Commit | Line | Data |
---|---|---|
3b55e94a | 1 | /* ADI Blackfin BFD support for 32-bit ELF. |
ab96bf03 | 2 | Copyright 2005, 2006, 2007 Free Software Foundation, Inc. |
0f64bb02 CM |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
0f64bb02 CM |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
0f64bb02 | 20 | |
0f64bb02 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
0f64bb02 CM |
23 | #include "libbfd.h" |
24 | #include "elf-bfd.h" | |
25 | #include "elf/bfin.h" | |
fa8f86ff | 26 | #include "dwarf2.h" |
48d502e1 | 27 | #include "hashtab.h" |
0f64bb02 | 28 | |
0f64bb02 CM |
29 | /* FUNCTION : bfin_pltpc_reloc |
30 | ABSTRACT : TODO : figure out how to handle pltpc relocs. */ | |
31 | static bfd_reloc_status_type | |
32 | bfin_pltpc_reloc ( | |
33 | bfd *abfd ATTRIBUTE_UNUSED, | |
34 | arelent *reloc_entry ATTRIBUTE_UNUSED, | |
35 | asymbol *symbol ATTRIBUTE_UNUSED, | |
36 | PTR data ATTRIBUTE_UNUSED, | |
37 | asection *input_section ATTRIBUTE_UNUSED, | |
38 | bfd *output_bfd ATTRIBUTE_UNUSED, | |
3b55e94a | 39 | char **error_message ATTRIBUTE_UNUSED) |
0f64bb02 CM |
40 | { |
41 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
3b55e94a | 42 | return flag; |
0f64bb02 CM |
43 | } |
44 | \f | |
45 | ||
46 | static bfd_reloc_status_type | |
47 | bfin_pcrel24_reloc (bfd *abfd, | |
48 | arelent *reloc_entry, | |
49 | asymbol *symbol, | |
50 | PTR data, | |
51 | asection *input_section, | |
52 | bfd *output_bfd, | |
53 | char **error_message ATTRIBUTE_UNUSED) | |
54 | { | |
55 | bfd_vma relocation; | |
56 | bfd_size_type addr = reloc_entry->address; | |
57 | bfd_vma output_base = 0; | |
58 | reloc_howto_type *howto = reloc_entry->howto; | |
59 | asection *output_section; | |
60 | bfd_boolean relocatable = (output_bfd != NULL); | |
61 | ||
62 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
63 | return bfd_reloc_outofrange; | |
64 | ||
3b55e94a BS |
65 | if (bfd_is_und_section (symbol->section) |
66 | && (symbol->flags & BSF_WEAK) == 0 | |
67 | && !relocatable) | |
68 | return bfd_reloc_undefined; | |
69 | ||
70 | if (bfd_is_com_section (symbol->section)) | |
71 | relocation = 0; | |
0f64bb02 | 72 | else |
3b55e94a | 73 | relocation = symbol->value; |
0f64bb02 | 74 | |
3b55e94a BS |
75 | output_section = symbol->section->output_section; |
76 | ||
77 | if (relocatable) | |
78 | output_base = 0; | |
79 | else | |
80 | output_base = output_section->vma; | |
81 | ||
82 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) | |
83 | relocation += output_base + symbol->section->output_offset; | |
0f64bb02 | 84 | |
3b55e94a BS |
85 | if (!relocatable && !strcmp (symbol->name, symbol->section->name)) |
86 | relocation += reloc_entry->addend; | |
0f64bb02 | 87 | |
0f64bb02 CM |
88 | relocation -= input_section->output_section->vma + input_section->output_offset; |
89 | relocation -= reloc_entry->address; | |
90 | ||
91 | if (howto->complain_on_overflow != complain_overflow_dont) | |
92 | { | |
93 | bfd_reloc_status_type status; | |
3b55e94a BS |
94 | status = bfd_check_overflow (howto->complain_on_overflow, |
95 | howto->bitsize, | |
96 | howto->rightshift, | |
97 | bfd_arch_bits_per_address(abfd), | |
98 | relocation); | |
0f64bb02 CM |
99 | if (status != bfd_reloc_ok) |
100 | return status; | |
101 | } | |
3b55e94a | 102 | |
0f64bb02 CM |
103 | /* if rightshift is 1 and the number odd, return error. */ |
104 | if (howto->rightshift && (relocation & 0x01)) | |
105 | { | |
106 | fprintf(stderr, "relocation should be even number\n"); | |
107 | return bfd_reloc_overflow; | |
108 | } | |
109 | ||
110 | relocation >>= (bfd_vma) howto->rightshift; | |
111 | /* Shift everything up to where it's going to be used. */ | |
112 | ||
113 | relocation <<= (bfd_vma) howto->bitpos; | |
114 | ||
115 | if (relocatable) | |
116 | { | |
117 | reloc_entry->address += input_section->output_offset; | |
118 | reloc_entry->addend += symbol->section->output_offset; | |
119 | } | |
120 | ||
121 | { | |
122 | short x; | |
123 | ||
124 | /* We are getting reloc_entry->address 2 byte off from | |
3b55e94a BS |
125 | the start of instruction. Assuming absolute postion |
126 | of the reloc data. But, following code had been written assuming | |
127 | reloc address is starting at begining of instruction. | |
128 | To compensate that I have increased the value of | |
129 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ | |
0f64bb02 CM |
130 | |
131 | relocation += 1; | |
132 | x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2); | |
133 | x = (x & 0xff00) | ((relocation >> 16) & 0xff); | |
134 | bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2); | |
135 | ||
136 | x = bfd_get_16 (abfd, (bfd_byte *) data + addr); | |
137 | x = relocation & 0xFFFF; | |
138 | bfd_put_16 (abfd, x, (unsigned char *) data + addr ); | |
139 | } | |
140 | return bfd_reloc_ok; | |
141 | } | |
142 | ||
143 | static bfd_reloc_status_type | |
3b55e94a BS |
144 | bfin_imm16_reloc (bfd *abfd, |
145 | arelent *reloc_entry, | |
146 | asymbol *symbol, | |
147 | PTR data, | |
148 | asection *input_section, | |
149 | bfd *output_bfd, | |
150 | char **error_message ATTRIBUTE_UNUSED) | |
0f64bb02 | 151 | { |
3b55e94a BS |
152 | bfd_vma relocation, x; |
153 | bfd_size_type reloc_addr = reloc_entry->address; | |
0f64bb02 | 154 | bfd_vma output_base = 0; |
3b55e94a | 155 | reloc_howto_type *howto = reloc_entry->howto; |
0f64bb02 CM |
156 | asection *output_section; |
157 | bfd_boolean relocatable = (output_bfd != NULL); | |
158 | ||
3b55e94a BS |
159 | /* Is the address of the relocation really within the section? */ |
160 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
161 | return bfd_reloc_outofrange; | |
162 | ||
0f64bb02 CM |
163 | if (bfd_is_und_section (symbol->section) |
164 | && (symbol->flags & BSF_WEAK) == 0 | |
165 | && !relocatable) | |
166 | return bfd_reloc_undefined; | |
167 | ||
0f64bb02 | 168 | output_section = symbol->section->output_section; |
3b55e94a | 169 | relocation = symbol->value; |
0f64bb02 CM |
170 | |
171 | /* Convert input-section-relative symbol value to absolute. */ | |
172 | if (relocatable) | |
173 | output_base = 0; | |
174 | else | |
175 | output_base = output_section->vma; | |
176 | ||
3b55e94a | 177 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
0f64bb02 CM |
178 | relocation += output_base + symbol->section->output_offset; |
179 | ||
180 | /* Add in supplied addend. */ | |
181 | relocation += reloc_entry->addend; | |
182 | ||
183 | if (relocatable) | |
184 | { | |
185 | reloc_entry->address += input_section->output_offset; | |
186 | reloc_entry->addend += symbol->section->output_offset; | |
187 | } | |
0f64bb02 CM |
188 | else |
189 | { | |
190 | reloc_entry->addend = 0; | |
191 | } | |
192 | ||
193 | if (howto->complain_on_overflow != complain_overflow_dont) | |
194 | { | |
195 | bfd_reloc_status_type flag; | |
196 | flag = bfd_check_overflow (howto->complain_on_overflow, | |
3b55e94a BS |
197 | howto->bitsize, |
198 | howto->rightshift, | |
199 | bfd_arch_bits_per_address(abfd), | |
200 | relocation); | |
0f64bb02 | 201 | if (flag != bfd_reloc_ok) |
3b55e94a | 202 | return flag; |
0f64bb02 CM |
203 | } |
204 | ||
0f64bb02 CM |
205 | /* Here the variable relocation holds the final address of the |
206 | symbol we are relocating against, plus any addend. */ | |
207 | ||
0f64bb02 CM |
208 | relocation >>= (bfd_vma) howto->rightshift; |
209 | x = relocation; | |
210 | bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr); | |
211 | return bfd_reloc_ok; | |
212 | } | |
213 | ||
214 | ||
215 | static bfd_reloc_status_type | |
216 | bfin_byte4_reloc (bfd *abfd, | |
217 | arelent *reloc_entry, | |
218 | asymbol *symbol, | |
219 | PTR data, | |
220 | asection *input_section, | |
221 | bfd *output_bfd, | |
3b55e94a | 222 | char **error_message ATTRIBUTE_UNUSED) |
0f64bb02 CM |
223 | { |
224 | bfd_vma relocation, x; | |
225 | bfd_size_type addr = reloc_entry->address; | |
226 | bfd_vma output_base = 0; | |
227 | asection *output_section; | |
228 | bfd_boolean relocatable = (output_bfd != NULL); | |
229 | ||
230 | /* Is the address of the relocation really within the section? */ | |
231 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
232 | return bfd_reloc_outofrange; | |
233 | ||
3b55e94a BS |
234 | if (bfd_is_und_section (symbol->section) |
235 | && (symbol->flags & BSF_WEAK) == 0 | |
236 | && !relocatable) | |
237 | return bfd_reloc_undefined; | |
0f64bb02 | 238 | |
3b55e94a BS |
239 | output_section = symbol->section->output_section; |
240 | relocation = symbol->value; | |
241 | /* Convert input-section-relative symbol value to absolute. */ | |
242 | if (relocatable) | |
243 | output_base = 0; | |
0f64bb02 | 244 | else |
3b55e94a BS |
245 | output_base = output_section->vma; |
246 | ||
247 | if ((symbol->name | |
248 | && symbol->section->name | |
249 | && !strcmp (symbol->name, symbol->section->name)) | |
250 | || !relocatable) | |
0f64bb02 | 251 | { |
3b55e94a | 252 | relocation += output_base + symbol->section->output_offset; |
0f64bb02 CM |
253 | } |
254 | ||
3b55e94a BS |
255 | relocation += reloc_entry->addend; |
256 | ||
0f64bb02 | 257 | if (relocatable) |
3b55e94a | 258 | { |
0f64bb02 CM |
259 | /* This output will be relocatable ... like ld -r. */ |
260 | reloc_entry->address += input_section->output_offset; | |
261 | reloc_entry->addend += symbol->section->output_offset; | |
262 | } | |
263 | else | |
264 | { | |
265 | reloc_entry->addend = 0; | |
266 | } | |
267 | ||
268 | /* Here the variable relocation holds the final address of the | |
269 | symbol we are relocating against, plus any addend. */ | |
270 | x = relocation & 0xFFFF0000; | |
271 | x >>=16; | |
272 | bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2); | |
3b55e94a | 273 | |
0f64bb02 CM |
274 | x = relocation & 0x0000FFFF; |
275 | bfd_put_16 (abfd, x, (unsigned char *) data + addr); | |
276 | return bfd_reloc_ok; | |
277 | } | |
278 | ||
279 | /* bfin_bfd_reloc handles the blackfin arithmetic relocations. | |
280 | Use this instead of bfd_perform_relocation. */ | |
281 | static bfd_reloc_status_type | |
282 | bfin_bfd_reloc (bfd *abfd, | |
283 | arelent *reloc_entry, | |
284 | asymbol *symbol, | |
285 | PTR data, | |
286 | asection *input_section, | |
287 | bfd *output_bfd, | |
288 | char **error_message ATTRIBUTE_UNUSED) | |
289 | { | |
290 | bfd_vma relocation; | |
291 | bfd_size_type addr = reloc_entry->address; | |
292 | bfd_vma output_base = 0; | |
293 | reloc_howto_type *howto = reloc_entry->howto; | |
294 | asection *output_section; | |
295 | bfd_boolean relocatable = (output_bfd != NULL); | |
296 | ||
297 | /* Is the address of the relocation really within the section? */ | |
298 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
299 | return bfd_reloc_outofrange; | |
300 | ||
3b55e94a BS |
301 | if (bfd_is_und_section (symbol->section) |
302 | && (symbol->flags & BSF_WEAK) == 0 | |
303 | && !relocatable) | |
304 | return bfd_reloc_undefined; | |
305 | ||
306 | /* Get symbol value. (Common symbols are special.) */ | |
307 | if (bfd_is_com_section (symbol->section)) | |
308 | relocation = 0; | |
0f64bb02 | 309 | else |
3b55e94a BS |
310 | relocation = symbol->value; |
311 | ||
312 | output_section = symbol->section->output_section; | |
313 | ||
314 | /* Convert input-section-relative symbol value to absolute. */ | |
315 | if (relocatable) | |
316 | output_base = 0; | |
317 | else | |
318 | output_base = output_section->vma; | |
319 | ||
320 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) | |
321 | relocation += output_base + symbol->section->output_offset; | |
322 | ||
323 | if (!relocatable && !strcmp (symbol->name, symbol->section->name)) | |
0f64bb02 | 324 | { |
3b55e94a BS |
325 | /* Add in supplied addend. */ |
326 | relocation += reloc_entry->addend; | |
0f64bb02 | 327 | } |
3b55e94a | 328 | |
0f64bb02 CM |
329 | /* Here the variable relocation holds the final address of the |
330 | symbol we are relocating against, plus any addend. */ | |
331 | ||
332 | if (howto->pc_relative == TRUE) | |
333 | { | |
334 | relocation -= input_section->output_section->vma + input_section->output_offset; | |
335 | ||
336 | if (howto->pcrel_offset == TRUE) | |
337 | relocation -= reloc_entry->address; | |
338 | } | |
339 | ||
340 | if (relocatable) | |
341 | { | |
342 | reloc_entry->address += input_section->output_offset; | |
343 | reloc_entry->addend += symbol->section->output_offset; | |
344 | } | |
345 | ||
346 | if (howto->complain_on_overflow != complain_overflow_dont) | |
347 | { | |
348 | bfd_reloc_status_type status; | |
349 | ||
3b55e94a | 350 | status = bfd_check_overflow (howto->complain_on_overflow, |
0f64bb02 | 351 | howto->bitsize, |
3b55e94a | 352 | howto->rightshift, |
0f64bb02 CM |
353 | bfd_arch_bits_per_address(abfd), |
354 | relocation); | |
355 | if (status != bfd_reloc_ok) | |
356 | return status; | |
357 | } | |
3b55e94a | 358 | |
0f64bb02 CM |
359 | /* If rightshift is 1 and the number odd, return error. */ |
360 | if (howto->rightshift && (relocation & 0x01)) | |
361 | { | |
362 | fprintf(stderr, "relocation should be even number\n"); | |
363 | return bfd_reloc_overflow; | |
364 | } | |
365 | ||
366 | relocation >>= (bfd_vma) howto->rightshift; | |
367 | ||
368 | /* Shift everything up to where it's going to be used. */ | |
369 | ||
370 | relocation <<= (bfd_vma) howto->bitpos; | |
371 | ||
3b55e94a | 372 | #define DOIT(x) \ |
0f64bb02 CM |
373 | x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask)) |
374 | ||
375 | /* handle 8 and 16 bit relocations here. */ | |
376 | switch (howto->size) | |
377 | { | |
378 | case 0: | |
379 | { | |
380 | char x = bfd_get_8 (abfd, (char *) data + addr); | |
381 | DOIT (x); | |
382 | bfd_put_8 (abfd, x, (unsigned char *) data + addr); | |
383 | } | |
384 | break; | |
385 | ||
386 | case 1: | |
387 | { | |
388 | unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr); | |
389 | DOIT (x); | |
390 | bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr); | |
391 | } | |
392 | break; | |
393 | ||
394 | default: | |
395 | return bfd_reloc_other; | |
396 | } | |
397 | ||
3b55e94a | 398 | return bfd_reloc_ok; |
0f64bb02 CM |
399 | } |
400 | ||
0f64bb02 CM |
401 | /* HOWTO Table for blackfin. |
402 | Blackfin relocations are fairly complicated. | |
403 | Some of the salient features are | |
404 | a. Even numbered offsets. A number of (not all) relocations are | |
405 | even numbered. This means that the rightmost bit is not stored. | |
406 | Needs to right shift by 1 and check to see if value is not odd | |
407 | b. A relocation can be an expression. An expression takes on | |
408 | a variety of relocations arranged in a stack. | |
409 | As a result, we cannot use the standard generic function as special | |
410 | function. We will have our own, which is very similar to the standard | |
411 | generic function except that it understands how to get the value from | |
412 | the relocation stack. . */ | |
413 | ||
414 | #define BFIN_RELOC_MIN 0 | |
48d502e1 | 415 | #define BFIN_RELOC_MAX 0x21 |
0f64bb02 CM |
416 | #define BFIN_GNUEXT_RELOC_MIN 0x40 |
417 | #define BFIN_GNUEXT_RELOC_MAX 0x43 | |
418 | #define BFIN_ARELOC_MIN 0xE0 | |
419 | #define BFIN_ARELOC_MAX 0xF3 | |
420 | ||
421 | static reloc_howto_type bfin_howto_table [] = | |
422 | { | |
423 | /* This reloc does nothing. . */ | |
424 | HOWTO (R_unused0, /* type. */ | |
425 | 0, /* rightshift. */ | |
426 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
427 | 32, /* bitsize. */ | |
428 | FALSE, /* pc_relative. */ | |
429 | 0, /* bitpos. */ | |
430 | complain_overflow_bitfield, /* complain_on_overflow. */ | |
431 | bfd_elf_generic_reloc, /* special_function. */ | |
432 | "R_unused0", /* name. */ | |
433 | FALSE, /* partial_inplace. */ | |
434 | 0, /* src_mask. */ | |
435 | 0, /* dst_mask. */ | |
436 | FALSE), /* pcrel_offset. */ | |
437 | ||
438 | HOWTO (R_pcrel5m2, /* type. */ | |
439 | 1, /* rightshift. */ | |
440 | 1, /* size (0 = byte, 1 = short, 2 = long).. */ | |
441 | 4, /* bitsize. */ | |
442 | TRUE, /* pc_relative. */ | |
443 | 0, /* bitpos. */ | |
444 | complain_overflow_unsigned, /* complain_on_overflow. */ | |
445 | bfin_bfd_reloc, /* special_function. */ | |
446 | "R_pcrel5m2", /* name. */ | |
447 | FALSE, /* partial_inplace. */ | |
f4707595 | 448 | 0, /* src_mask. */ |
0f64bb02 CM |
449 | 0x0000000F, /* dst_mask. */ |
450 | FALSE), /* pcrel_offset. */ | |
451 | ||
452 | HOWTO (R_unused1, /* type. */ | |
453 | 0, /* rightshift. */ | |
454 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
455 | 32, /* bitsize. */ | |
456 | FALSE, /* pc_relative. */ | |
457 | 0, /* bitpos. */ | |
458 | complain_overflow_bitfield, /* complain_on_overflow. */ | |
459 | bfd_elf_generic_reloc, /* special_function. */ | |
460 | "R_unused1", /* name. */ | |
461 | FALSE, /* partial_inplace. */ | |
462 | 0, /* src_mask. */ | |
463 | 0, /* dst_mask. */ | |
464 | FALSE), /* pcrel_offset. */ | |
465 | ||
466 | HOWTO (R_pcrel10, /* type. */ | |
467 | 1, /* rightshift. */ | |
468 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
469 | 10, /* bitsize. */ | |
470 | TRUE, /* pc_relative. */ | |
471 | 0, /* bitpos. */ | |
472 | complain_overflow_signed, /* complain_on_overflow. */ | |
473 | bfin_bfd_reloc, /* special_function. */ | |
474 | "R_pcrel10", /* name. */ | |
475 | FALSE, /* partial_inplace. */ | |
f4707595 | 476 | 0, /* src_mask. */ |
0f64bb02 CM |
477 | 0x000003FF, /* dst_mask. */ |
478 | TRUE), /* pcrel_offset. */ | |
3b55e94a | 479 | |
0f64bb02 CM |
480 | HOWTO (R_pcrel12_jump, /* type. */ |
481 | 1, /* rightshift. */ | |
482 | /* the offset is actually 13 bit | |
483 | aligned on a word boundary so | |
484 | only 12 bits have to be used. | |
485 | Right shift the rightmost bit.. */ | |
486 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
487 | 12, /* bitsize. */ | |
488 | TRUE, /* pc_relative. */ | |
489 | 0, /* bitpos. */ | |
490 | complain_overflow_signed, /* complain_on_overflow. */ | |
491 | bfin_bfd_reloc, /* special_function. */ | |
492 | "R_pcrel12_jump", /* name. */ | |
493 | FALSE, /* partial_inplace. */ | |
f4707595 | 494 | 0, /* src_mask. */ |
0f64bb02 CM |
495 | 0x0FFF, /* dst_mask. */ |
496 | TRUE), /* pcrel_offset. */ | |
497 | ||
498 | HOWTO (R_rimm16, /* type. */ | |
499 | 0, /* rightshift. */ | |
500 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
501 | 16, /* bitsize. */ | |
502 | FALSE, /* pc_relative. */ | |
503 | 0, /* bitpos. */ | |
504 | complain_overflow_signed, /* complain_on_overflow. */ | |
505 | bfin_imm16_reloc, /* special_function. */ | |
506 | "R_rimm16", /* name. */ | |
507 | FALSE, /* partial_inplace. */ | |
f4707595 | 508 | 0, /* src_mask. */ |
0f64bb02 CM |
509 | 0x0000FFFF, /* dst_mask. */ |
510 | TRUE), /* pcrel_offset. */ | |
511 | ||
512 | HOWTO (R_luimm16, /* type. */ | |
513 | 0, /* rightshift. */ | |
514 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
515 | 16, /* bitsize. */ | |
516 | FALSE, /* pc_relative. */ | |
517 | 0, /* bitpos. */ | |
518 | complain_overflow_dont, /* complain_on_overflow. */ | |
519 | bfin_imm16_reloc, /* special_function. */ | |
520 | "R_luimm16", /* name. */ | |
521 | FALSE, /* partial_inplace. */ | |
f4707595 | 522 | 0, /* src_mask. */ |
0f64bb02 CM |
523 | 0x0000FFFF, /* dst_mask. */ |
524 | TRUE), /* pcrel_offset. */ | |
3b55e94a | 525 | |
0f64bb02 CM |
526 | HOWTO (R_huimm16, /* type. */ |
527 | 16, /* rightshift. */ | |
528 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
529 | 16, /* bitsize. */ | |
530 | FALSE, /* pc_relative. */ | |
531 | 0, /* bitpos. */ | |
532 | complain_overflow_unsigned, /* complain_on_overflow. */ | |
533 | bfin_imm16_reloc, /* special_function. */ | |
534 | "R_huimm16", /* name. */ | |
535 | FALSE, /* partial_inplace. */ | |
f4707595 | 536 | 0, /* src_mask. */ |
0f64bb02 CM |
537 | 0x0000FFFF, /* dst_mask. */ |
538 | TRUE), /* pcrel_offset. */ | |
539 | ||
540 | HOWTO (R_pcrel12_jump_s, /* type. */ | |
541 | 1, /* rightshift. */ | |
542 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
543 | 12, /* bitsize. */ | |
544 | TRUE, /* pc_relative. */ | |
545 | 0, /* bitpos. */ | |
546 | complain_overflow_signed, /* complain_on_overflow. */ | |
547 | bfin_bfd_reloc, /* special_function. */ | |
548 | "R_pcrel12_jump_s", /* name. */ | |
549 | FALSE, /* partial_inplace. */ | |
f4707595 | 550 | 0, /* src_mask. */ |
0f64bb02 CM |
551 | 0x00000FFF, /* dst_mask. */ |
552 | TRUE), /* pcrel_offset. */ | |
553 | ||
554 | HOWTO (R_pcrel24_jump_x, /* type. */ | |
555 | 1, /* rightshift. */ | |
556 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
557 | 24, /* bitsize. */ | |
558 | TRUE, /* pc_relative. */ | |
559 | 0, /* bitpos. */ | |
560 | complain_overflow_signed, /* complain_on_overflow. */ | |
561 | bfin_pcrel24_reloc, /* special_function. */ | |
562 | "R_pcrel24_jump_x", /* name. */ | |
563 | FALSE, /* partial_inplace. */ | |
f4707595 | 564 | 0, /* src_mask. */ |
0f64bb02 CM |
565 | 0x00FFFFFF, /* dst_mask. */ |
566 | TRUE), /* pcrel_offset. */ | |
567 | ||
568 | HOWTO (R_pcrel24, /* type. */ | |
569 | 1, /* rightshift. */ | |
570 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
571 | 24, /* bitsize. */ | |
572 | TRUE, /* pc_relative. */ | |
573 | 0, /* bitpos. */ | |
574 | complain_overflow_signed, /* complain_on_overflow. */ | |
575 | bfin_pcrel24_reloc, /* special_function. */ | |
576 | "R_pcrel24", /* name. */ | |
577 | FALSE, /* partial_inplace. */ | |
f4707595 | 578 | 0, /* src_mask. */ |
0f64bb02 CM |
579 | 0x00FFFFFF, /* dst_mask. */ |
580 | TRUE), /* pcrel_offset. */ | |
581 | ||
582 | HOWTO (R_unusedb, /* type. */ | |
583 | 0, /* rightshift. */ | |
584 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
585 | 32, /* bitsize. */ | |
586 | FALSE, /* pc_relative. */ | |
587 | 0, /* bitpos. */ | |
588 | complain_overflow_dont, /* complain_on_overflow. */ | |
589 | bfd_elf_generic_reloc, /* special_function. */ | |
590 | "R_unusedb", /* name. */ | |
591 | FALSE, /* partial_inplace. */ | |
592 | 0, /* src_mask. */ | |
593 | 0, /* dst_mask. */ | |
594 | FALSE), /* pcrel_offset. */ | |
595 | ||
596 | HOWTO (R_unusedc, /* type. */ | |
597 | 0, /* rightshift. */ | |
598 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
599 | 32, /* bitsize. */ | |
600 | FALSE, /* pc_relative. */ | |
601 | 0, /* bitpos. */ | |
602 | complain_overflow_dont, /* complain_on_overflow. */ | |
603 | bfd_elf_generic_reloc, /* special_function. */ | |
604 | "R_unusedc", /* name. */ | |
605 | FALSE, /* partial_inplace. */ | |
606 | 0, /* src_mask. */ | |
607 | 0, /* dst_mask. */ | |
608 | FALSE), /* pcrel_offset. */ | |
609 | ||
610 | HOWTO (R_pcrel24_jump_l, /* type. */ | |
611 | 1, /* rightshift. */ | |
612 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
613 | 24, /* bitsize. */ | |
614 | TRUE, /* pc_relative. */ | |
615 | 0, /* bitpos. */ | |
616 | complain_overflow_signed, /* complain_on_overflow. */ | |
617 | bfin_pcrel24_reloc, /* special_function. */ | |
618 | "R_pcrel24_jump_l", /* name. */ | |
619 | FALSE, /* partial_inplace. */ | |
f4707595 | 620 | 0, /* src_mask. */ |
0f64bb02 CM |
621 | 0x00FFFFFF, /* dst_mask. */ |
622 | TRUE), /* pcrel_offset. */ | |
623 | ||
624 | HOWTO (R_pcrel24_call_x, /* type. */ | |
625 | 1, /* rightshift. */ | |
626 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
627 | 24, /* bitsize. */ | |
628 | TRUE, /* pc_relative. */ | |
629 | 0, /* bitpos. */ | |
630 | complain_overflow_signed, /* complain_on_overflow. */ | |
631 | bfin_pcrel24_reloc, /* special_function. */ | |
632 | "R_pcrel24_call_x", /* name. */ | |
633 | FALSE, /* partial_inplace. */ | |
f4707595 | 634 | 0, /* src_mask. */ |
0f64bb02 CM |
635 | 0x00FFFFFF, /* dst_mask. */ |
636 | TRUE), /* pcrel_offset. */ | |
637 | ||
638 | HOWTO (R_var_eq_symb, /* type. */ | |
639 | 0, /* rightshift. */ | |
640 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
641 | 32, /* bitsize. */ | |
642 | FALSE, /* pc_relative. */ | |
643 | 0, /* bitpos. */ | |
644 | complain_overflow_bitfield, /* complain_on_overflow. */ | |
645 | bfin_bfd_reloc, /* special_function. */ | |
646 | "R_var_eq_symb", /* name. */ | |
647 | FALSE, /* partial_inplace. */ | |
648 | 0, /* src_mask. */ | |
649 | 0, /* dst_mask. */ | |
650 | FALSE), /* pcrel_offset. */ | |
651 | ||
652 | HOWTO (R_byte_data, /* type. */ | |
653 | 0, /* rightshift. */ | |
654 | 0, /* size (0 = byte, 1 = short, 2 = long). */ | |
655 | 8, /* bitsize. */ | |
656 | FALSE, /* pc_relative. */ | |
657 | 0, /* bitpos. */ | |
658 | complain_overflow_unsigned, /* complain_on_overflow. */ | |
659 | bfin_bfd_reloc, /* special_function. */ | |
660 | "R_byte_data", /* name. */ | |
661 | FALSE, /* partial_inplace. */ | |
f4707595 | 662 | 0, /* src_mask. */ |
0f64bb02 CM |
663 | 0xFF, /* dst_mask. */ |
664 | TRUE), /* pcrel_offset. */ | |
665 | ||
666 | HOWTO (R_byte2_data, /* type. */ | |
667 | 0, /* rightshift. */ | |
668 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
669 | 16, /* bitsize. */ | |
670 | FALSE, /* pc_relative. */ | |
671 | 0, /* bitpos. */ | |
672 | complain_overflow_signed, /* complain_on_overflow. */ | |
673 | bfin_bfd_reloc, /* special_function. */ | |
674 | "R_byte2_data", /* name. */ | |
675 | FALSE, /* partial_inplace. */ | |
f4707595 | 676 | 0, /* src_mask. */ |
0f64bb02 CM |
677 | 0xFFFF, /* dst_mask. */ |
678 | TRUE), /* pcrel_offset. */ | |
679 | ||
680 | HOWTO (R_byte4_data, /* type. */ | |
681 | 0, /* rightshift. */ | |
682 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
683 | 32, /* bitsize. */ | |
684 | FALSE, /* pc_relative. */ | |
685 | 0, /* bitpos. */ | |
686 | complain_overflow_unsigned, /* complain_on_overflow. */ | |
687 | bfin_byte4_reloc, /* special_function. */ | |
688 | "R_byte4_data", /* name. */ | |
689 | FALSE, /* partial_inplace. */ | |
f4707595 | 690 | 0, /* src_mask. */ |
0f64bb02 CM |
691 | 0xFFFFFFFF, /* dst_mask. */ |
692 | TRUE), /* pcrel_offset. */ | |
693 | ||
694 | HOWTO (R_pcrel11, /* type. */ | |
695 | 1, /* rightshift. */ | |
696 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
697 | 10, /* bitsize. */ | |
698 | TRUE, /* pc_relative. */ | |
699 | 0, /* bitpos. */ | |
700 | complain_overflow_unsigned, /* complain_on_overflow. */ | |
701 | bfin_bfd_reloc, /* special_function. */ | |
702 | "R_pcrel11", /* name. */ | |
703 | FALSE, /* partial_inplace. */ | |
f4707595 | 704 | 0, /* src_mask. */ |
0f64bb02 CM |
705 | 0x000003FF, /* dst_mask. */ |
706 | FALSE), /* pcrel_offset. */ | |
48d502e1 BS |
707 | |
708 | ||
709 | /* A 18-bit signed operand with the GOT offset for the address of | |
710 | the symbol. */ | |
711 | HOWTO (R_BFIN_GOT17M4, /* type */ | |
712 | 2, /* rightshift */ | |
713 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
714 | 16, /* bitsize */ | |
715 | FALSE, /* pc_relative */ | |
716 | 0, /* bitpos */ | |
717 | complain_overflow_signed, /* complain_on_overflow */ | |
718 | bfd_elf_generic_reloc, /* special_function */ | |
5dff4664 | 719 | "R_BFIN_GOT17M4", /* name */ |
48d502e1 BS |
720 | FALSE, /* partial_inplace */ |
721 | 0xffff, /* src_mask */ | |
722 | 0xffff, /* dst_mask */ | |
723 | FALSE), /* pcrel_offset */ | |
724 | ||
725 | /* The upper 16 bits of the GOT offset for the address of the | |
726 | symbol. */ | |
727 | HOWTO (R_BFIN_GOTHI, /* type */ | |
728 | 0, /* rightshift */ | |
729 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
730 | 16, /* bitsize */ | |
731 | FALSE, /* pc_relative */ | |
732 | 0, /* bitpos */ | |
733 | complain_overflow_dont, /* complain_on_overflow */ | |
734 | bfd_elf_generic_reloc, /* special_function */ | |
735 | "R_BFIN_GOTHI", /* name */ | |
736 | FALSE, /* partial_inplace */ | |
737 | 0xffff, /* src_mask */ | |
738 | 0xffff, /* dst_mask */ | |
739 | FALSE), /* pcrel_offset */ | |
740 | ||
741 | /* The lower 16 bits of the GOT offset for the address of the | |
742 | symbol. */ | |
743 | HOWTO (R_BFIN_GOTLO, /* type */ | |
744 | 0, /* rightshift */ | |
745 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
746 | 16, /* bitsize */ | |
747 | FALSE, /* pc_relative */ | |
748 | 0, /* bitpos */ | |
749 | complain_overflow_dont, /* complain_on_overflow */ | |
750 | bfd_elf_generic_reloc, /* special_function */ | |
751 | "R_BFIN_GOTLO", /* name */ | |
752 | FALSE, /* partial_inplace */ | |
753 | 0xffff, /* src_mask */ | |
754 | 0xffff, /* dst_mask */ | |
755 | FALSE), /* pcrel_offset */ | |
756 | ||
757 | /* The 32-bit address of the canonical descriptor of a function. */ | |
758 | HOWTO (R_BFIN_FUNCDESC, /* type */ | |
759 | 0, /* rightshift */ | |
760 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
761 | 32, /* bitsize */ | |
762 | FALSE, /* pc_relative */ | |
763 | 0, /* bitpos */ | |
764 | complain_overflow_bitfield, /* complain_on_overflow */ | |
765 | bfd_elf_generic_reloc, /* special_function */ | |
766 | "R_BFIN_FUNCDESC", /* name */ | |
767 | FALSE, /* partial_inplace */ | |
768 | 0xffffffff, /* src_mask */ | |
769 | 0xffffffff, /* dst_mask */ | |
770 | FALSE), /* pcrel_offset */ | |
771 | ||
772 | /* A 12-bit signed operand with the GOT offset for the address of | |
773 | canonical descriptor of a function. */ | |
774 | HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */ | |
775 | 2, /* rightshift */ | |
776 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
777 | 16, /* bitsize */ | |
778 | FALSE, /* pc_relative */ | |
779 | 0, /* bitpos */ | |
780 | complain_overflow_signed, /* complain_on_overflow */ | |
781 | bfd_elf_generic_reloc, /* special_function */ | |
782 | "R_BFIN_FUNCDESC_GOT17M4", /* name */ | |
783 | FALSE, /* partial_inplace */ | |
784 | 0xffff, /* src_mask */ | |
785 | 0xffff, /* dst_mask */ | |
786 | FALSE), /* pcrel_offset */ | |
787 | ||
788 | /* The upper 16 bits of the GOT offset for the address of the | |
789 | canonical descriptor of a function. */ | |
790 | HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */ | |
791 | 0, /* rightshift */ | |
792 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
793 | 16, /* bitsize */ | |
794 | FALSE, /* pc_relative */ | |
795 | 0, /* bitpos */ | |
796 | complain_overflow_dont, /* complain_on_overflow */ | |
797 | bfd_elf_generic_reloc, /* special_function */ | |
798 | "R_BFIN_FUNCDESC_GOTHI", /* name */ | |
799 | FALSE, /* partial_inplace */ | |
800 | 0xffff, /* src_mask */ | |
801 | 0xffff, /* dst_mask */ | |
802 | FALSE), /* pcrel_offset */ | |
803 | ||
804 | /* The lower 16 bits of the GOT offset for the address of the | |
805 | canonical descriptor of a function. */ | |
806 | HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */ | |
807 | 0, /* rightshift */ | |
808 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
809 | 16, /* bitsize */ | |
810 | FALSE, /* pc_relative */ | |
811 | 0, /* bitpos */ | |
812 | complain_overflow_dont, /* complain_on_overflow */ | |
813 | bfd_elf_generic_reloc, /* special_function */ | |
814 | "R_BFIN_FUNCDESC_GOTLO", /* name */ | |
815 | FALSE, /* partial_inplace */ | |
816 | 0xffff, /* src_mask */ | |
817 | 0xffff, /* dst_mask */ | |
818 | FALSE), /* pcrel_offset */ | |
819 | ||
820 | /* The 32-bit address of the canonical descriptor of a function. */ | |
821 | HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */ | |
822 | 0, /* rightshift */ | |
823 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
824 | 64, /* bitsize */ | |
825 | FALSE, /* pc_relative */ | |
826 | 0, /* bitpos */ | |
827 | complain_overflow_bitfield, /* complain_on_overflow */ | |
828 | bfd_elf_generic_reloc, /* special_function */ | |
829 | "R_BFIN_FUNCDESC_VALUE", /* name */ | |
830 | FALSE, /* partial_inplace */ | |
831 | 0xffffffff, /* src_mask */ | |
832 | 0xffffffff, /* dst_mask */ | |
833 | FALSE), /* pcrel_offset */ | |
834 | ||
835 | /* A 12-bit signed operand with the GOT offset for the address of | |
836 | canonical descriptor of a function. */ | |
837 | HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */ | |
838 | 2, /* rightshift */ | |
839 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
840 | 16, /* bitsize */ | |
841 | FALSE, /* pc_relative */ | |
842 | 0, /* bitpos */ | |
843 | complain_overflow_signed, /* complain_on_overflow */ | |
844 | bfd_elf_generic_reloc, /* special_function */ | |
845 | "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */ | |
846 | FALSE, /* partial_inplace */ | |
847 | 0xffff, /* src_mask */ | |
848 | 0xffff, /* dst_mask */ | |
849 | FALSE), /* pcrel_offset */ | |
850 | ||
851 | /* The upper 16 bits of the GOT offset for the address of the | |
852 | canonical descriptor of a function. */ | |
853 | HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */ | |
854 | 0, /* rightshift */ | |
855 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
856 | 16, /* bitsize */ | |
857 | FALSE, /* pc_relative */ | |
858 | 0, /* bitpos */ | |
859 | complain_overflow_dont, /* complain_on_overflow */ | |
860 | bfd_elf_generic_reloc, /* special_function */ | |
861 | "R_BFIN_FUNCDESC_GOTOFFHI", /* name */ | |
862 | FALSE, /* partial_inplace */ | |
863 | 0xffff, /* src_mask */ | |
864 | 0xffff, /* dst_mask */ | |
865 | FALSE), /* pcrel_offset */ | |
866 | ||
867 | /* The lower 16 bits of the GOT offset for the address of the | |
868 | canonical descriptor of a function. */ | |
869 | HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */ | |
870 | 0, /* rightshift */ | |
871 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
872 | 16, /* bitsize */ | |
873 | FALSE, /* pc_relative */ | |
874 | 0, /* bitpos */ | |
875 | complain_overflow_dont, /* complain_on_overflow */ | |
876 | bfd_elf_generic_reloc, /* special_function */ | |
877 | "R_BFIN_FUNCDESC_GOTOFFLO", /* name */ | |
878 | FALSE, /* partial_inplace */ | |
879 | 0xffff, /* src_mask */ | |
880 | 0xffff, /* dst_mask */ | |
881 | FALSE), /* pcrel_offset */ | |
882 | ||
883 | /* A 12-bit signed operand with the GOT offset for the address of | |
884 | the symbol. */ | |
885 | HOWTO (R_BFIN_GOTOFF17M4, /* type */ | |
886 | 2, /* rightshift */ | |
887 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
888 | 16, /* bitsize */ | |
889 | FALSE, /* pc_relative */ | |
890 | 0, /* bitpos */ | |
891 | complain_overflow_signed, /* complain_on_overflow */ | |
892 | bfd_elf_generic_reloc, /* special_function */ | |
893 | "R_BFIN_GOTOFF17M4", /* name */ | |
894 | FALSE, /* partial_inplace */ | |
895 | 0xffff, /* src_mask */ | |
896 | 0xffff, /* dst_mask */ | |
897 | FALSE), /* pcrel_offset */ | |
898 | ||
899 | /* The upper 16 bits of the GOT offset for the address of the | |
900 | symbol. */ | |
901 | HOWTO (R_BFIN_GOTOFFHI, /* type */ | |
902 | 0, /* rightshift */ | |
903 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
904 | 16, /* bitsize */ | |
905 | FALSE, /* pc_relative */ | |
906 | 0, /* bitpos */ | |
907 | complain_overflow_dont, /* complain_on_overflow */ | |
908 | bfd_elf_generic_reloc, /* special_function */ | |
909 | "R_BFIN_GOTOFFHI", /* name */ | |
910 | FALSE, /* partial_inplace */ | |
911 | 0xffff, /* src_mask */ | |
912 | 0xffff, /* dst_mask */ | |
913 | FALSE), /* pcrel_offset */ | |
914 | ||
915 | /* The lower 16 bits of the GOT offset for the address of the | |
916 | symbol. */ | |
917 | HOWTO (R_BFIN_GOTOFFLO, /* type */ | |
918 | 0, /* rightshift */ | |
919 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
920 | 16, /* bitsize */ | |
921 | FALSE, /* pc_relative */ | |
922 | 0, /* bitpos */ | |
923 | complain_overflow_dont, /* complain_on_overflow */ | |
924 | bfd_elf_generic_reloc, /* special_function */ | |
925 | "R_BFIN_GOTOFFLO", /* name */ | |
926 | FALSE, /* partial_inplace */ | |
927 | 0xffff, /* src_mask */ | |
928 | 0xffff, /* dst_mask */ | |
929 | FALSE), /* pcrel_offset */ | |
0f64bb02 CM |
930 | }; |
931 | ||
0f64bb02 CM |
932 | static reloc_howto_type bfin_gnuext_howto_table [] = |
933 | { | |
934 | HOWTO (R_pltpc, /* type. */ | |
935 | 0, /* rightshift. */ | |
936 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
937 | 16, /* bitsize. */ | |
938 | FALSE, /* pc_relative. */ | |
939 | 0, /* bitpos. */ | |
940 | complain_overflow_bitfield, /* complain_on_overflow. */ | |
941 | bfin_pltpc_reloc, /* special_function. */ | |
942 | "R_pltpc", /* name. */ | |
943 | FALSE, /* partial_inplace. */ | |
944 | 0xffff, /* src_mask. */ | |
945 | 0xffff, /* dst_mask. */ | |
946 | FALSE), /* pcrel_offset. */ | |
947 | ||
948 | HOWTO (R_got, /* type. */ | |
949 | 0, /* rightshift. */ | |
950 | 1, /* size (0 = byte, 1 = short, 2 = long). */ | |
951 | 16, /* bitsize. */ | |
952 | FALSE, /* pc_relative. */ | |
953 | 0, /* bitpos. */ | |
954 | complain_overflow_bitfield, /* complain_on_overflow. */ | |
955 | bfd_elf_generic_reloc, /* special_function. */ | |
956 | "R_got", /* name. */ | |
957 | FALSE, /* partial_inplace. */ | |
958 | 0x7fff, /* src_mask. */ | |
959 | 0x7fff, /* dst_mask. */ | |
960 | FALSE), /* pcrel_offset. */ | |
961 | ||
962 | /* GNU extension to record C++ vtable hierarchy. */ | |
963 | HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */ | |
964 | 0, /* rightshift. */ | |
965 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
966 | 0, /* bitsize. */ | |
967 | FALSE, /* pc_relative. */ | |
968 | 0, /* bitpos. */ | |
969 | complain_overflow_dont, /* complain_on_overflow. */ | |
970 | NULL, /* special_function. */ | |
971 | "R_BFIN_GNU_VTINHERIT", /* name. */ | |
972 | FALSE, /* partial_inplace. */ | |
973 | 0, /* src_mask. */ | |
974 | 0, /* dst_mask. */ | |
975 | FALSE), /* pcrel_offset. */ | |
976 | ||
977 | /* GNU extension to record C++ vtable member usage. */ | |
978 | HOWTO (R_BFIN_GNU_VTENTRY, /* type. */ | |
979 | 0, /* rightshift. */ | |
980 | 2, /* size (0 = byte, 1 = short, 2 = long). */ | |
981 | 0, /* bitsize. */ | |
982 | FALSE, /* pc_relative. */ | |
983 | 0, /* bitpos. */ | |
984 | complain_overflow_dont, /* complain_on_overflow. */ | |
985 | _bfd_elf_rel_vtable_reloc_fn, /* special_function. */ | |
986 | "R_BFIN_GNU_VTENTRY", /* name. */ | |
987 | FALSE, /* partial_inplace. */ | |
988 | 0, /* src_mask. */ | |
989 | 0, /* dst_mask. */ | |
990 | FALSE) /* pcrel_offset. */ | |
991 | }; | |
992 | ||
993 | struct bfin_reloc_map | |
994 | { | |
995 | bfd_reloc_code_real_type bfd_reloc_val; | |
996 | unsigned int bfin_reloc_val; | |
997 | }; | |
998 | ||
999 | static const struct bfin_reloc_map bfin_reloc_map [] = | |
1000 | { | |
1001 | { BFD_RELOC_NONE, R_unused0 }, | |
1002 | { BFD_RELOC_BFIN_5_PCREL, R_pcrel5m2 }, | |
1003 | { BFD_RELOC_NONE, R_unused1 }, | |
1004 | { BFD_RELOC_BFIN_10_PCREL, R_pcrel10 }, | |
1005 | { BFD_RELOC_BFIN_12_PCREL_JUMP, R_pcrel12_jump }, | |
1006 | { BFD_RELOC_BFIN_16_IMM, R_rimm16 }, | |
1007 | { BFD_RELOC_BFIN_16_LOW, R_luimm16 }, | |
1008 | { BFD_RELOC_BFIN_16_HIGH, R_huimm16 }, | |
1009 | { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_pcrel12_jump_s }, | |
1010 | { BFD_RELOC_24_PCREL, R_pcrel24 }, | |
1011 | { BFD_RELOC_24_PCREL, R_pcrel24 }, | |
1012 | { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_pcrel24_jump_l }, | |
1013 | { BFD_RELOC_NONE, R_unusedb }, | |
1014 | { BFD_RELOC_NONE, R_unusedc }, | |
1015 | { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_pcrel24_call_x }, | |
1016 | { BFD_RELOC_8, R_byte_data }, | |
1017 | { BFD_RELOC_16, R_byte2_data }, | |
1018 | { BFD_RELOC_32, R_byte4_data }, | |
1019 | { BFD_RELOC_BFIN_11_PCREL, R_pcrel11 }, | |
1020 | { BFD_RELOC_BFIN_GOT, R_got }, | |
1021 | { BFD_RELOC_BFIN_PLTPC, R_pltpc }, | |
48d502e1 BS |
1022 | |
1023 | { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 }, | |
1024 | { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI }, | |
1025 | { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO }, | |
1026 | { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC }, | |
1027 | { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 }, | |
1028 | { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI }, | |
1029 | { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO }, | |
1030 | { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE }, | |
1031 | { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 }, | |
1032 | { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI }, | |
1033 | { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO }, | |
1034 | { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 }, | |
1035 | { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI }, | |
1036 | { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO }, | |
1037 | ||
0f64bb02 CM |
1038 | { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT }, |
1039 | { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY }, | |
0f64bb02 CM |
1040 | }; |
1041 | ||
1042 | ||
1043 | static void | |
1044 | bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, | |
1045 | arelent *cache_ptr, | |
1046 | Elf_Internal_Rela *dst) | |
1047 | { | |
1048 | unsigned int r_type; | |
1049 | ||
1050 | r_type = ELF32_R_TYPE (dst->r_info); | |
1051 | ||
1052 | if (r_type <= BFIN_RELOC_MAX) | |
1053 | cache_ptr->howto = &bfin_howto_table [r_type]; | |
1054 | ||
0f64bb02 CM |
1055 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
1056 | cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; | |
1057 | ||
1058 | else | |
1059 | cache_ptr->howto = (reloc_howto_type *) NULL; | |
0f64bb02 | 1060 | } |
157090f7 | 1061 | |
0f64bb02 CM |
1062 | /* Given a BFD reloc type, return the howto. */ |
1063 | static reloc_howto_type * | |
1064 | bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, | |
1065 | bfd_reloc_code_real_type code) | |
1066 | { | |
1067 | unsigned int i; | |
1068 | unsigned int r_type = BFIN_RELOC_MIN; | |
1069 | ||
1070 | for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;) | |
1071 | if (bfin_reloc_map[i].bfd_reloc_val == code) | |
1072 | r_type = bfin_reloc_map[i].bfin_reloc_val; | |
1073 | ||
1074 | if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN) | |
1075 | return &bfin_howto_table [r_type]; | |
1076 | ||
0f64bb02 CM |
1077 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
1078 | return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; | |
1079 | ||
1080 | return (reloc_howto_type *) NULL; | |
157090f7 | 1081 | } |
0f64bb02 | 1082 | |
157090f7 AM |
1083 | static reloc_howto_type * |
1084 | bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1085 | const char *r_name) | |
1086 | { | |
1087 | unsigned int i; | |
1088 | ||
1089 | for (i = 0; | |
1090 | i < (sizeof (bfin_howto_table) | |
1091 | / sizeof (bfin_howto_table[0])); | |
1092 | i++) | |
1093 | if (bfin_howto_table[i].name != NULL | |
1094 | && strcasecmp (bfin_howto_table[i].name, r_name) == 0) | |
1095 | return &bfin_howto_table[i]; | |
1096 | ||
1097 | for (i = 0; | |
1098 | i < (sizeof (bfin_gnuext_howto_table) | |
1099 | / sizeof (bfin_gnuext_howto_table[0])); | |
1100 | i++) | |
1101 | if (bfin_gnuext_howto_table[i].name != NULL | |
1102 | && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0) | |
1103 | return &bfin_gnuext_howto_table[i]; | |
1104 | ||
1105 | return NULL; | |
0f64bb02 | 1106 | } |
157090f7 | 1107 | |
0f64bb02 CM |
1108 | /* Given a bfin relocation type, return the howto. */ |
1109 | static reloc_howto_type * | |
1110 | bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, | |
1111 | unsigned int r_type) | |
1112 | { | |
1113 | if (r_type <= BFIN_RELOC_MAX) | |
1114 | return &bfin_howto_table [r_type]; | |
1115 | ||
0f64bb02 CM |
1116 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
1117 | return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; | |
1118 | ||
1119 | return (reloc_howto_type *) NULL; | |
0f64bb02 CM |
1120 | } |
1121 | ||
1122 | /* Return TRUE if the name is a local label. | |
1123 | bfin local labels begin with L$. */ | |
1124 | static bfd_boolean | |
1125 | bfin_is_local_label_name ( | |
51408ec2 | 1126 | bfd *abfd, |
0f64bb02 CM |
1127 | const char *label) |
1128 | { | |
1129 | if (label[0] == 'L' && label[1] == '$' ) | |
1130 | return TRUE; | |
1131 | ||
1132 | return _bfd_elf_is_local_label_name (abfd, label); | |
1133 | } | |
c96a8570 BS |
1134 | \f |
1135 | /* Look through the relocs for a section during the first phase, and | |
1136 | allocate space in the global offset table or procedure linkage | |
1137 | table. */ | |
0f64bb02 | 1138 | |
c96a8570 BS |
1139 | static bfd_boolean |
1140 | bfin_check_relocs (bfd * abfd, | |
1141 | struct bfd_link_info *info, | |
1142 | asection *sec, | |
1143 | const Elf_Internal_Rela *relocs) | |
48d502e1 | 1144 | { |
c96a8570 BS |
1145 | bfd *dynobj; |
1146 | Elf_Internal_Shdr *symtab_hdr; | |
1147 | struct elf_link_hash_entry **sym_hashes; | |
1148 | bfd_signed_vma *local_got_refcounts; | |
1149 | const Elf_Internal_Rela *rel; | |
1150 | const Elf_Internal_Rela *rel_end; | |
48d502e1 | 1151 | asection *sgot; |
c96a8570 | 1152 | asection *srelgot; |
c96a8570 BS |
1153 | if (info->relocatable) |
1154 | return TRUE; | |
48d502e1 | 1155 | |
c96a8570 BS |
1156 | dynobj = elf_hash_table (info)->dynobj; |
1157 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1158 | sym_hashes = elf_sym_hashes (abfd); | |
1159 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
48d502e1 | 1160 | |
c96a8570 BS |
1161 | sgot = NULL; |
1162 | srelgot = NULL; | |
48d502e1 | 1163 | |
c96a8570 BS |
1164 | rel_end = relocs + sec->reloc_count; |
1165 | for (rel = relocs; rel < rel_end; rel++) | |
48d502e1 | 1166 | { |
c96a8570 BS |
1167 | unsigned long r_symndx; |
1168 | struct elf_link_hash_entry *h; | |
48d502e1 | 1169 | |
c96a8570 BS |
1170 | r_symndx = ELF32_R_SYM (rel->r_info); |
1171 | if (r_symndx < symtab_hdr->sh_info) | |
1172 | h = NULL; | |
1173 | else | |
1174 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
48d502e1 | 1175 | |
c96a8570 BS |
1176 | switch (ELF32_R_TYPE (rel->r_info)) |
1177 | { | |
1178 | /* This relocation describes the C++ object vtable hierarchy. | |
1179 | Reconstruct it for later use during GC. */ | |
1180 | case R_BFIN_GNU_VTINHERIT: | |
1181 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1182 | return FALSE; | |
1183 | break; | |
48d502e1 | 1184 | |
c96a8570 BS |
1185 | /* This relocation describes which C++ vtable entries |
1186 | are actually used. Record for later use during GC. */ | |
1187 | case R_BFIN_GNU_VTENTRY: | |
1188 | BFD_ASSERT (h != NULL); | |
1189 | if (h != NULL | |
1190 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1191 | return FALSE; | |
1192 | break; | |
48d502e1 | 1193 | |
c96a8570 BS |
1194 | case R_got: |
1195 | if (h != NULL | |
1196 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) | |
1197 | break; | |
1198 | /* Fall through. */ | |
48d502e1 | 1199 | |
c96a8570 BS |
1200 | if (dynobj == NULL) |
1201 | { | |
1202 | /* Create the .got section. */ | |
1203 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
1204 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
1205 | return FALSE; | |
1206 | } | |
48d502e1 | 1207 | |
c96a8570 BS |
1208 | if (sgot == NULL) |
1209 | { | |
1210 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1211 | BFD_ASSERT (sgot != NULL); | |
1212 | } | |
48d502e1 | 1213 | |
c96a8570 BS |
1214 | if (srelgot == NULL && (h != NULL || info->shared)) |
1215 | { | |
1216 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1217 | if (srelgot == NULL) | |
1218 | { | |
1219 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1220 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
1221 | | SEC_READONLY); | |
1222 | srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", | |
1223 | flags); | |
1224 | if (srelgot == NULL | |
1225 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
1226 | return FALSE; | |
1227 | } | |
1228 | } | |
48d502e1 | 1229 | |
c96a8570 BS |
1230 | if (h != NULL) |
1231 | { | |
1232 | if (h->got.refcount == 0) | |
1233 | { | |
1234 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1235 | if (h->dynindx == -1 && !h->forced_local) | |
1236 | { | |
1237 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
1238 | return FALSE; | |
1239 | } | |
48d502e1 | 1240 | |
c96a8570 BS |
1241 | /* Allocate space in the .got section. */ |
1242 | sgot->size += 4; | |
1243 | /* Allocate relocation space. */ | |
1244 | srelgot->size += sizeof (Elf32_External_Rela); | |
1245 | } | |
1246 | h->got.refcount++; | |
1247 | } | |
1248 | else | |
1249 | { | |
1250 | /* This is a global offset table entry for a local symbol. */ | |
1251 | if (local_got_refcounts == NULL) | |
1252 | { | |
1253 | bfd_size_type size; | |
48d502e1 | 1254 | |
c96a8570 BS |
1255 | size = symtab_hdr->sh_info; |
1256 | size *= sizeof (bfd_signed_vma); | |
1257 | local_got_refcounts = ((bfd_signed_vma *) | |
1258 | bfd_zalloc (abfd, size)); | |
1259 | if (local_got_refcounts == NULL) | |
1260 | return FALSE; | |
1261 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
1262 | } | |
1263 | if (local_got_refcounts[r_symndx] == 0) | |
1264 | { | |
1265 | sgot->size += 4; | |
1266 | if (info->shared) | |
1267 | { | |
1268 | /* If we are generating a shared object, we need to | |
1269 | output a R_68K_RELATIVE reloc so that the dynamic | |
1270 | linker can adjust this GOT entry. */ | |
1271 | srelgot->size += sizeof (Elf32_External_Rela); | |
1272 | } | |
1273 | } | |
1274 | local_got_refcounts[r_symndx]++; | |
1275 | } | |
1276 | break; | |
48d502e1 | 1277 | |
c96a8570 BS |
1278 | default: |
1279 | break; | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | return TRUE; | |
48d502e1 BS |
1284 | } |
1285 | ||
c96a8570 BS |
1286 | static enum elf_reloc_type_class |
1287 | elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela) | |
48d502e1 | 1288 | { |
c96a8570 BS |
1289 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
1290 | { | |
1291 | default: | |
1292 | return reloc_class_normal; | |
1293 | } | |
1294 | } | |
1295 | \f | |
1296 | static bfd_reloc_status_type | |
1297 | bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto, | |
1298 | bfd *input_bfd, asection *input_section, | |
1299 | bfd_byte *contents, bfd_vma address, | |
1300 | bfd_vma value, bfd_vma addend) | |
1301 | { | |
1302 | int r_type = ELF32_R_TYPE (rel->r_info); | |
48d502e1 | 1303 | |
c96a8570 BS |
1304 | if (r_type == R_pcrel24 || r_type == R_pcrel24_jump_l) |
1305 | { | |
1306 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1307 | bfd_vma x; | |
48d502e1 | 1308 | |
c96a8570 BS |
1309 | if (address > bfd_get_section_limit (input_bfd, input_section)) |
1310 | return bfd_reloc_outofrange; | |
48d502e1 | 1311 | |
c96a8570 | 1312 | value += addend; |
48d502e1 | 1313 | |
c96a8570 BS |
1314 | /* Perform usual pc-relative correction. */ |
1315 | value -= input_section->output_section->vma + input_section->output_offset; | |
1316 | value -= address; | |
48d502e1 | 1317 | |
c96a8570 BS |
1318 | /* We are getting reloc_entry->address 2 byte off from |
1319 | the start of instruction. Assuming absolute postion | |
1320 | of the reloc data. But, following code had been written assuming | |
1321 | reloc address is starting at begining of instruction. | |
1322 | To compensate that I have increased the value of | |
1323 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ | |
48d502e1 | 1324 | |
c96a8570 BS |
1325 | value += 2; |
1326 | address -= 2; | |
48d502e1 | 1327 | |
c96a8570 BS |
1328 | if ((value & 0xFF000000) != 0 |
1329 | && (value & 0xFF000000) != 0xFF000000) | |
1330 | r = bfd_reloc_overflow; | |
48d502e1 | 1331 | |
c96a8570 | 1332 | value >>= 1; |
48d502e1 | 1333 | |
c96a8570 BS |
1334 | x = bfd_get_16 (input_bfd, contents + address); |
1335 | x = (x & 0xff00) | ((value >> 16) & 0xff); | |
1336 | bfd_put_16 (input_bfd, x, contents + address); | |
48d502e1 | 1337 | |
c96a8570 BS |
1338 | x = bfd_get_16 (input_bfd, contents + address + 2); |
1339 | x = value & 0xFFFF; | |
1340 | bfd_put_16 (input_bfd, x, contents + address + 2); | |
1341 | return r; | |
1342 | } | |
48d502e1 | 1343 | |
c96a8570 BS |
1344 | return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, |
1345 | rel->r_offset, value, addend); | |
48d502e1 | 1346 | |
48d502e1 BS |
1347 | } |
1348 | ||
c96a8570 BS |
1349 | static bfd_boolean |
1350 | bfin_relocate_section (bfd * output_bfd, | |
1351 | struct bfd_link_info *info, | |
1352 | bfd * input_bfd, | |
1353 | asection * input_section, | |
1354 | bfd_byte * contents, | |
1355 | Elf_Internal_Rela * relocs, | |
1356 | Elf_Internal_Sym * local_syms, | |
1357 | asection ** local_sections) | |
48d502e1 | 1358 | { |
c96a8570 BS |
1359 | bfd *dynobj; |
1360 | Elf_Internal_Shdr *symtab_hdr; | |
1361 | struct elf_link_hash_entry **sym_hashes; | |
1362 | bfd_vma *local_got_offsets; | |
1363 | asection *sgot; | |
c96a8570 BS |
1364 | Elf_Internal_Rela *rel; |
1365 | Elf_Internal_Rela *relend; | |
1366 | int i = 0; | |
48d502e1 | 1367 | |
c96a8570 BS |
1368 | dynobj = elf_hash_table (info)->dynobj; |
1369 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1370 | sym_hashes = elf_sym_hashes (input_bfd); | |
1371 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
48d502e1 | 1372 | |
c96a8570 | 1373 | sgot = NULL; |
48d502e1 | 1374 | |
c96a8570 BS |
1375 | rel = relocs; |
1376 | relend = relocs + input_section->reloc_count; | |
1377 | for (; rel < relend; rel++, i++) | |
1378 | { | |
1379 | int r_type; | |
1380 | reloc_howto_type *howto; | |
1381 | unsigned long r_symndx; | |
1382 | struct elf_link_hash_entry *h; | |
1383 | Elf_Internal_Sym *sym; | |
1384 | asection *sec; | |
1385 | bfd_vma relocation = 0; | |
1386 | bfd_boolean unresolved_reloc; | |
1387 | bfd_reloc_status_type r; | |
1388 | bfd_vma address; | |
48d502e1 | 1389 | |
c96a8570 BS |
1390 | r_type = ELF32_R_TYPE (rel->r_info); |
1391 | if (r_type < 0 || r_type >= 243) | |
1392 | { | |
1393 | bfd_set_error (bfd_error_bad_value); | |
1394 | return FALSE; | |
1395 | } | |
48d502e1 | 1396 | |
c96a8570 BS |
1397 | if (r_type == R_BFIN_GNU_VTENTRY |
1398 | || r_type == R_BFIN_GNU_VTINHERIT) | |
1399 | continue; | |
48d502e1 | 1400 | |
c96a8570 BS |
1401 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
1402 | if (howto == NULL) | |
1403 | { | |
1404 | bfd_set_error (bfd_error_bad_value); | |
1405 | return FALSE; | |
1406 | } | |
1407 | r_symndx = ELF32_R_SYM (rel->r_info); | |
48d502e1 | 1408 | |
c96a8570 BS |
1409 | h = NULL; |
1410 | sym = NULL; | |
1411 | sec = NULL; | |
1412 | unresolved_reloc = FALSE; | |
48d502e1 | 1413 | |
c96a8570 BS |
1414 | if (r_symndx < symtab_hdr->sh_info) |
1415 | { | |
1416 | sym = local_syms + r_symndx; | |
1417 | sec = local_sections[r_symndx]; | |
1418 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1419 | } | |
1420 | else | |
1421 | { | |
1422 | bfd_boolean warned; | |
48d502e1 | 1423 | |
c96a8570 BS |
1424 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1425 | r_symndx, symtab_hdr, sym_hashes, | |
1426 | h, sec, relocation, | |
1427 | unresolved_reloc, warned); | |
1428 | } | |
48d502e1 | 1429 | |
c96a8570 BS |
1430 | if (sec != NULL && elf_discarded_section (sec)) |
1431 | { | |
1432 | /* For relocs against symbols from removed linkonce sections, | |
1433 | or sections discarded by a linker script, we just want the | |
1434 | section contents zeroed. Avoid any special processing. */ | |
1435 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1436 | rel->r_info = 0; | |
1437 | rel->r_addend = 0; | |
1438 | continue; | |
1439 | } | |
48d502e1 | 1440 | |
c96a8570 BS |
1441 | if (info->relocatable) |
1442 | continue; | |
48d502e1 | 1443 | |
c96a8570 | 1444 | address = rel->r_offset; |
48d502e1 | 1445 | |
c96a8570 BS |
1446 | /* Then, process normally. */ |
1447 | switch (r_type) | |
1448 | { | |
1449 | case R_BFIN_GNU_VTINHERIT: | |
1450 | case R_BFIN_GNU_VTENTRY: | |
1451 | return bfd_reloc_ok; | |
48d502e1 | 1452 | |
c96a8570 BS |
1453 | case R_got: |
1454 | /* Relocation is to the address of the entry for this symbol | |
1455 | in the global offset table. */ | |
1456 | if (h != NULL | |
1457 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) | |
1458 | goto do_default; | |
1459 | /* Fall through. */ | |
1460 | /* Relocation is the offset of the entry for this symbol in | |
1461 | the global offset table. */ | |
48d502e1 | 1462 | |
c96a8570 BS |
1463 | { |
1464 | bfd_vma off; | |
48d502e1 | 1465 | |
c96a8570 BS |
1466 | if (dynobj == NULL) |
1467 | { | |
1468 | /* Create the .got section. */ | |
1469 | elf_hash_table (info)->dynobj = dynobj = output_bfd; | |
1470 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
1471 | return FALSE; | |
1472 | } | |
48d502e1 | 1473 | |
c96a8570 BS |
1474 | if (sgot == NULL) |
1475 | { | |
1476 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1477 | BFD_ASSERT (sgot != NULL); | |
1478 | } | |
48d502e1 | 1479 | |
c96a8570 BS |
1480 | if (h != NULL) |
1481 | { | |
1482 | bfd_boolean dyn; | |
48d502e1 | 1483 | |
c96a8570 BS |
1484 | off = h->got.offset; |
1485 | BFD_ASSERT (off != (bfd_vma) - 1); | |
1486 | dyn = elf_hash_table (info)->dynamic_sections_created; | |
48d502e1 | 1487 | |
c96a8570 BS |
1488 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
1489 | || (info->shared | |
1490 | && (info->symbolic | |
1491 | || h->dynindx == -1 | |
1492 | || h->forced_local) | |
1493 | && h->def_regular)) | |
1494 | { | |
1495 | /* This is actually a static link, or it is a | |
1496 | -Bsymbolic link and the symbol is defined | |
1497 | locally, or the symbol was forced to be local | |
1498 | because of a version file.. We must initialize | |
1499 | this entry in the global offset table. Since | |
1500 | the offset must always be a multiple of 4, we | |
1501 | use the least significant bit to record whether | |
1502 | we have initialized it already. | |
48d502e1 | 1503 | |
c96a8570 BS |
1504 | When doing a dynamic link, we create a .rela.got |
1505 | relocation entry to initialize the value. This | |
1506 | is done in the finish_dynamic_symbol routine. */ | |
1507 | if ((off & 1) != 0) | |
1508 | off &= ~1; | |
1509 | else | |
1510 | { | |
1511 | bfd_put_32 (output_bfd, relocation, | |
1512 | sgot->contents + off); | |
1513 | h->got.offset |= 1; | |
1514 | } | |
1515 | } | |
1516 | else | |
1517 | unresolved_reloc = FALSE; | |
1518 | } | |
1519 | else | |
1520 | { | |
1521 | BFD_ASSERT (local_got_offsets != NULL); | |
1522 | off = local_got_offsets[r_symndx]; | |
1523 | BFD_ASSERT (off != (bfd_vma) - 1); | |
48d502e1 | 1524 | |
c96a8570 BS |
1525 | /* The offset must always be a multiple of 4. We use |
1526 | the least significant bit to record whether we have | |
1527 | already generated the necessary reloc. */ | |
1528 | if ((off & 1) != 0) | |
1529 | off &= ~1; | |
1530 | else | |
1531 | { | |
1532 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
48d502e1 | 1533 | |
c96a8570 BS |
1534 | if (info->shared) |
1535 | { | |
1536 | asection *s; | |
1537 | Elf_Internal_Rela outrel; | |
1538 | bfd_byte *loc; | |
48d502e1 | 1539 | |
c96a8570 BS |
1540 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1541 | BFD_ASSERT (s != NULL); | |
48d502e1 | 1542 | |
c96a8570 BS |
1543 | outrel.r_offset = (sgot->output_section->vma |
1544 | + sgot->output_offset + off); | |
1545 | outrel.r_info = | |
1546 | ELF32_R_INFO (0, R_pcrel24); | |
1547 | outrel.r_addend = relocation; | |
1548 | loc = s->contents; | |
1549 | loc += | |
1550 | s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1551 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1552 | } | |
48d502e1 | 1553 | |
c96a8570 BS |
1554 | local_got_offsets[r_symndx] |= 1; |
1555 | } | |
1556 | } | |
48d502e1 | 1557 | |
c96a8570 BS |
1558 | relocation = sgot->output_offset + off; |
1559 | rel->r_addend = 0; | |
1560 | /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ | |
1561 | relocation /= 4; | |
1562 | } | |
1563 | goto do_default; | |
1564 | ||
1565 | default: | |
1566 | do_default: | |
1567 | r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, | |
1568 | contents, address, | |
1569 | relocation, rel->r_addend); | |
1570 | ||
1571 | break; | |
48d502e1 BS |
1572 | } |
1573 | ||
c96a8570 BS |
1574 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
1575 | because such sections are not SEC_ALLOC and thus ld.so will | |
1576 | not process them. */ | |
1577 | if (unresolved_reloc | |
1578 | && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)) | |
48d502e1 | 1579 | { |
c96a8570 BS |
1580 | (*_bfd_error_handler) |
1581 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), | |
1582 | input_bfd, | |
1583 | input_section, (long) rel->r_offset, h->root.root.string); | |
1584 | return FALSE; | |
48d502e1 | 1585 | } |
48d502e1 | 1586 | |
c96a8570 | 1587 | if (r != bfd_reloc_ok) |
48d502e1 | 1588 | { |
c96a8570 BS |
1589 | const char *name; |
1590 | ||
1591 | if (h != NULL) | |
1592 | name = h->root.root.string; | |
1593 | else | |
48d502e1 | 1594 | { |
c96a8570 BS |
1595 | name = bfd_elf_string_from_elf_section (input_bfd, |
1596 | symtab_hdr->sh_link, | |
1597 | sym->st_name); | |
1598 | if (name == NULL) | |
1599 | return FALSE; | |
1600 | if (*name == '\0') | |
1601 | name = bfd_section_name (input_bfd, sec); | |
48d502e1 | 1602 | } |
c96a8570 BS |
1603 | |
1604 | if (r == bfd_reloc_overflow) | |
48d502e1 | 1605 | { |
c96a8570 BS |
1606 | if (!(info->callbacks->reloc_overflow |
1607 | (info, (h ? &h->root : NULL), name, howto->name, | |
1608 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) | |
48d502e1 BS |
1609 | return FALSE; |
1610 | } | |
1611 | else | |
1612 | { | |
c96a8570 BS |
1613 | (*_bfd_error_handler) |
1614 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), | |
1615 | input_bfd, input_section, | |
1616 | (long) rel->r_offset, name, (int) r); | |
1617 | return FALSE; | |
48d502e1 | 1618 | } |
48d502e1 | 1619 | } |
48d502e1 BS |
1620 | } |
1621 | ||
c96a8570 BS |
1622 | return TRUE; |
1623 | } | |
48d502e1 | 1624 | |
c96a8570 BS |
1625 | static asection * |
1626 | bfin_gc_mark_hook (asection * sec, | |
1627 | struct bfd_link_info *info, | |
1628 | Elf_Internal_Rela * rel, | |
1629 | struct elf_link_hash_entry *h, | |
1630 | Elf_Internal_Sym * sym) | |
1631 | { | |
1632 | if (h != NULL) | |
1633 | switch (ELF32_R_TYPE (rel->r_info)) | |
1634 | { | |
1635 | case R_BFIN_GNU_VTINHERIT: | |
1636 | case R_BFIN_GNU_VTENTRY: | |
1637 | return NULL; | |
1638 | } | |
48d502e1 | 1639 | |
c96a8570 BS |
1640 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
1641 | } | |
48d502e1 | 1642 | |
c96a8570 | 1643 | /* Update the got entry reference counts for the section being removed. */ |
48d502e1 | 1644 | |
c96a8570 BS |
1645 | static bfd_boolean |
1646 | bfin_gc_sweep_hook (bfd * abfd, | |
1647 | struct bfd_link_info *info, | |
1648 | asection * sec, | |
1649 | const Elf_Internal_Rela * relocs) | |
1650 | { | |
1651 | Elf_Internal_Shdr *symtab_hdr; | |
1652 | struct elf_link_hash_entry **sym_hashes; | |
1653 | bfd_signed_vma *local_got_refcounts; | |
1654 | const Elf_Internal_Rela *rel, *relend; | |
1655 | bfd *dynobj; | |
1656 | asection *sgot; | |
1657 | asection *srelgot; | |
48d502e1 | 1658 | |
c96a8570 BS |
1659 | dynobj = elf_hash_table (info)->dynobj; |
1660 | if (dynobj == NULL) | |
0f64bb02 CM |
1661 | return TRUE; |
1662 | ||
0f64bb02 CM |
1663 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1664 | sym_hashes = elf_sym_hashes (abfd); | |
1665 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1666 | ||
c96a8570 BS |
1667 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
1668 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
0f64bb02 | 1669 | |
c96a8570 BS |
1670 | relend = relocs + sec->reloc_count; |
1671 | for (rel = relocs; rel < relend; rel++) | |
0f64bb02 CM |
1672 | { |
1673 | unsigned long r_symndx; | |
1674 | struct elf_link_hash_entry *h; | |
1675 | ||
0f64bb02 CM |
1676 | switch (ELF32_R_TYPE (rel->r_info)) |
1677 | { | |
0f64bb02 | 1678 | case R_got: |
c96a8570 BS |
1679 | r_symndx = ELF32_R_SYM (rel->r_info); |
1680 | if (r_symndx >= symtab_hdr->sh_info) | |
0f64bb02 | 1681 | { |
c96a8570 BS |
1682 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1683 | if (h->got.refcount > 0) | |
0f64bb02 | 1684 | { |
c96a8570 BS |
1685 | --h->got.refcount; |
1686 | if (h->got.refcount == 0) | |
0f64bb02 | 1687 | { |
c96a8570 BS |
1688 | /* We don't need the .got entry any more. */ |
1689 | sgot->size -= 4; | |
1690 | srelgot->size -= sizeof (Elf32_External_Rela); | |
0f64bb02 | 1691 | } |
0f64bb02 | 1692 | } |
0f64bb02 | 1693 | } |
c96a8570 | 1694 | else if (local_got_refcounts != NULL) |
0f64bb02 | 1695 | { |
c96a8570 | 1696 | if (local_got_refcounts[r_symndx] > 0) |
0f64bb02 | 1697 | { |
c96a8570 BS |
1698 | --local_got_refcounts[r_symndx]; |
1699 | if (local_got_refcounts[r_symndx] == 0) | |
0f64bb02 | 1700 | { |
c96a8570 BS |
1701 | /* We don't need the .got entry any more. */ |
1702 | sgot->size -= 4; | |
1703 | if (info->shared) | |
1704 | srelgot->size -= sizeof (Elf32_External_Rela); | |
0f64bb02 CM |
1705 | } |
1706 | } | |
0f64bb02 CM |
1707 | } |
1708 | break; | |
0f64bb02 CM |
1709 | default: |
1710 | break; | |
1711 | } | |
1712 | } | |
0f64bb02 CM |
1713 | return TRUE; |
1714 | } | |
c96a8570 BS |
1715 | \f |
1716 | extern const bfd_target bfd_elf32_bfinfdpic_vec; | |
1717 | #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec) | |
0f64bb02 | 1718 | |
c96a8570 BS |
1719 | /* An extension of the elf hash table data structure, containing some |
1720 | additional Blackfin-specific data. */ | |
1721 | struct bfinfdpic_elf_link_hash_table | |
c35e54f4 | 1722 | { |
c96a8570 | 1723 | struct elf_link_hash_table elf; |
c35e54f4 | 1724 | |
c96a8570 BS |
1725 | /* A pointer to the .got section. */ |
1726 | asection *sgot; | |
1727 | /* A pointer to the .rel.got section. */ | |
1728 | asection *sgotrel; | |
1729 | /* A pointer to the .rofixup section. */ | |
1730 | asection *sgotfixup; | |
1731 | /* A pointer to the .plt section. */ | |
1732 | asection *splt; | |
1733 | /* A pointer to the .rel.plt section. */ | |
1734 | asection *spltrel; | |
1735 | /* GOT base offset. */ | |
1736 | bfd_vma got0; | |
1737 | /* Location of the first non-lazy PLT entry, i.e., the number of | |
1738 | bytes taken by lazy PLT entries. */ | |
1739 | bfd_vma plt0; | |
1740 | /* A hash table holding information about which symbols were | |
1741 | referenced with which PIC-related relocations. */ | |
1742 | struct htab *relocs_info; | |
1743 | }; | |
c35e54f4 | 1744 | |
c96a8570 | 1745 | /* Get the Blackfin ELF linker hash table from a link_info structure. */ |
c35e54f4 | 1746 | |
c96a8570 BS |
1747 | #define bfinfdpic_hash_table(info) \ |
1748 | ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) | |
c35e54f4 | 1749 | |
c96a8570 BS |
1750 | #define bfinfdpic_got_section(info) \ |
1751 | (bfinfdpic_hash_table (info)->sgot) | |
1752 | #define bfinfdpic_gotrel_section(info) \ | |
1753 | (bfinfdpic_hash_table (info)->sgotrel) | |
1754 | #define bfinfdpic_gotfixup_section(info) \ | |
1755 | (bfinfdpic_hash_table (info)->sgotfixup) | |
1756 | #define bfinfdpic_plt_section(info) \ | |
1757 | (bfinfdpic_hash_table (info)->splt) | |
1758 | #define bfinfdpic_pltrel_section(info) \ | |
1759 | (bfinfdpic_hash_table (info)->spltrel) | |
1760 | #define bfinfdpic_relocs_info(info) \ | |
1761 | (bfinfdpic_hash_table (info)->relocs_info) | |
1762 | #define bfinfdpic_got_initial_offset(info) \ | |
1763 | (bfinfdpic_hash_table (info)->got0) | |
1764 | #define bfinfdpic_plt_initial_offset(info) \ | |
1765 | (bfinfdpic_hash_table (info)->plt0) | |
c35e54f4 | 1766 | |
c96a8570 BS |
1767 | /* The name of the dynamic interpreter. This is put in the .interp |
1768 | section. */ | |
c35e54f4 | 1769 | |
c96a8570 | 1770 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
c35e54f4 | 1771 | |
c96a8570 | 1772 | #define DEFAULT_STACK_SIZE 0x20000 |
c35e54f4 | 1773 | |
c96a8570 BS |
1774 | /* This structure is used to collect the number of entries present in |
1775 | each addressable range of the got. */ | |
1776 | struct _bfinfdpic_dynamic_got_info | |
1777 | { | |
1778 | /* Several bits of information about the current link. */ | |
1779 | struct bfd_link_info *info; | |
1780 | /* Total size needed for GOT entries within the 18- or 32-bit | |
1781 | ranges. */ | |
1782 | bfd_vma got17m4, gothilo; | |
1783 | /* Total size needed for function descriptor entries within the 18- | |
1784 | or 32-bit ranges. */ | |
1785 | bfd_vma fd17m4, fdhilo; | |
1786 | /* Total size needed function descriptor entries referenced in PLT | |
1787 | entries, that would be profitable to place in offsets close to | |
1788 | the PIC register. */ | |
1789 | bfd_vma fdplt; | |
1790 | /* Total size needed by lazy PLT entries. */ | |
1791 | bfd_vma lzplt; | |
1792 | /* Number of relocations carried over from input object files. */ | |
1793 | unsigned long relocs; | |
1794 | /* Number of fixups introduced by relocations in input object files. */ | |
1795 | unsigned long fixups; | |
1796 | }; | |
c35e54f4 | 1797 | |
c96a8570 | 1798 | /* Create a Blackfin ELF linker hash table. */ |
c35e54f4 | 1799 | |
c96a8570 BS |
1800 | static struct bfd_link_hash_table * |
1801 | bfinfdpic_elf_link_hash_table_create (bfd *abfd) | |
1802 | { | |
1803 | struct bfinfdpic_elf_link_hash_table *ret; | |
1804 | bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table); | |
c35e54f4 | 1805 | |
c96a8570 BS |
1806 | ret = bfd_zalloc (abfd, amt); |
1807 | if (ret == NULL) | |
1808 | return NULL; | |
c35e54f4 | 1809 | |
c96a8570 BS |
1810 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1811 | _bfd_elf_link_hash_newfunc, | |
1812 | sizeof (struct elf_link_hash_entry))) | |
1813 | { | |
1814 | free (ret); | |
1815 | return NULL; | |
1816 | } | |
c35e54f4 | 1817 | |
c96a8570 BS |
1818 | return &ret->elf.root; |
1819 | } | |
48d502e1 | 1820 | |
c96a8570 BS |
1821 | /* Decide whether a reference to a symbol can be resolved locally or |
1822 | not. If the symbol is protected, we want the local address, but | |
1823 | its function descriptor must be assigned by the dynamic linker. */ | |
1824 | #define BFINFDPIC_SYM_LOCAL(INFO, H) \ | |
1825 | (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \ | |
1826 | || ! elf_hash_table (INFO)->dynamic_sections_created) | |
1827 | #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \ | |
1828 | ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created) | |
48d502e1 | 1829 | |
c96a8570 BS |
1830 | /* This structure collects information on what kind of GOT, PLT or |
1831 | function descriptors are required by relocations that reference a | |
1832 | certain symbol. */ | |
1833 | struct bfinfdpic_relocs_info | |
1834 | { | |
1835 | /* The index of the symbol, as stored in the relocation r_info, if | |
1836 | we have a local symbol; -1 otherwise. */ | |
1837 | long symndx; | |
1838 | union | |
1839 | { | |
1840 | /* The input bfd in which the symbol is defined, if it's a local | |
1841 | symbol. */ | |
1842 | bfd *abfd; | |
1843 | /* If symndx == -1, the hash table entry corresponding to a global | |
1844 | symbol (even if it turns out to bind locally, in which case it | |
1845 | should ideally be replaced with section's symndx + addend). */ | |
1846 | struct elf_link_hash_entry *h; | |
1847 | } d; | |
1848 | /* The addend of the relocation that references the symbol. */ | |
1849 | bfd_vma addend; | |
48d502e1 | 1850 | |
c96a8570 BS |
1851 | /* The fields above are used to identify an entry. The fields below |
1852 | contain information on how an entry is used and, later on, which | |
1853 | locations it was assigned. */ | |
1854 | /* The following 2 fields record whether the symbol+addend above was | |
1855 | ever referenced with a GOT relocation. The 17M4 suffix indicates a | |
1856 | GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */ | |
1857 | unsigned got17m4; | |
1858 | unsigned gothilo; | |
1859 | /* Whether a FUNCDESC relocation references symbol+addend. */ | |
1860 | unsigned fd; | |
1861 | /* Whether a FUNCDESC_GOT relocation references symbol+addend. */ | |
1862 | unsigned fdgot17m4; | |
1863 | unsigned fdgothilo; | |
1864 | /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */ | |
1865 | unsigned fdgoff17m4; | |
1866 | unsigned fdgoffhilo; | |
1867 | /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or | |
1868 | GOTOFFHI relocations. The addend doesn't really matter, since we | |
1869 | envision that this will only be used to check whether the symbol | |
1870 | is mapped to the same segment as the got. */ | |
1871 | unsigned gotoff; | |
1872 | /* Whether symbol+addend is referenced by a LABEL24 relocation. */ | |
1873 | unsigned call; | |
1874 | /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE | |
1875 | relocation. */ | |
1876 | unsigned sym; | |
1877 | /* Whether we need a PLT entry for a symbol. Should be implied by | |
1878 | something like: | |
1879 | (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */ | |
1880 | unsigned plt:1; | |
1881 | /* Whether a function descriptor should be created in this link unit | |
1882 | for symbol+addend. Should be implied by something like: | |
1883 | (plt || fdgotoff17m4 || fdgotofflohi | |
1884 | || ((fd || fdgot17m4 || fdgothilo) | |
1885 | && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */ | |
1886 | unsigned privfd:1; | |
1887 | /* Whether a lazy PLT entry is needed for this symbol+addend. | |
1888 | Should be implied by something like: | |
1889 | (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h) | |
1890 | && ! (info->flags & DF_BIND_NOW)) */ | |
1891 | unsigned lazyplt:1; | |
1892 | /* Whether we've already emitted GOT relocations and PLT entries as | |
1893 | needed for this symbol. */ | |
1894 | unsigned done:1; | |
48d502e1 | 1895 | |
c96a8570 BS |
1896 | /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE |
1897 | relocations referencing the symbol. */ | |
1898 | unsigned relocs32, relocsfd, relocsfdv; | |
48d502e1 | 1899 | |
c96a8570 BS |
1900 | /* The number of .rofixups entries and dynamic relocations allocated |
1901 | for this symbol, minus any that might have already been used. */ | |
1902 | unsigned fixups, dynrelocs; | |
48d502e1 | 1903 | |
c96a8570 BS |
1904 | /* The offsets of the GOT entries assigned to symbol+addend, to the |
1905 | function descriptor's address, and to a function descriptor, | |
1906 | respectively. Should be zero if unassigned. The offsets are | |
1907 | counted from the value that will be assigned to the PIC register, | |
1908 | not from the beginning of the .got section. */ | |
1909 | bfd_signed_vma got_entry, fdgot_entry, fd_entry; | |
1910 | /* The offsets of the PLT entries assigned to symbol+addend, | |
1911 | non-lazy and lazy, respectively. If unassigned, should be | |
1912 | (bfd_vma)-1. */ | |
1913 | bfd_vma plt_entry, lzplt_entry; | |
1914 | }; | |
48d502e1 | 1915 | |
c96a8570 BS |
1916 | /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */ |
1917 | static hashval_t | |
1918 | bfinfdpic_relocs_info_hash (const void *entry_) | |
1919 | { | |
1920 | const struct bfinfdpic_relocs_info *entry = entry_; | |
48d502e1 | 1921 | |
c96a8570 BS |
1922 | return (entry->symndx == -1 |
1923 | ? (long) entry->d.h->root.root.hash | |
1924 | : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend; | |
1925 | } | |
f4707595 | 1926 | |
c96a8570 BS |
1927 | /* Test whether the key fields of two bfinfdpic_relocs_info entries are |
1928 | identical. */ | |
1929 | static int | |
1930 | bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2) | |
0f64bb02 | 1931 | { |
c96a8570 BS |
1932 | const struct bfinfdpic_relocs_info *e1 = entry1; |
1933 | const struct bfinfdpic_relocs_info *e2 = entry2; | |
0f64bb02 | 1934 | |
c96a8570 BS |
1935 | return e1->symndx == e2->symndx && e1->addend == e2->addend |
1936 | && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd); | |
1937 | } | |
48d502e1 | 1938 | |
c96a8570 BS |
1939 | /* Find or create an entry in a hash table HT that matches the key |
1940 | fields of the given ENTRY. If it's not found, memory for a new | |
1941 | entry is allocated in ABFD's obstack. */ | |
1942 | static struct bfinfdpic_relocs_info * | |
1943 | bfinfdpic_relocs_info_find (struct htab *ht, | |
1944 | bfd *abfd, | |
1945 | const struct bfinfdpic_relocs_info *entry, | |
1946 | enum insert_option insert) | |
1947 | { | |
1948 | struct bfinfdpic_relocs_info **loc = | |
1949 | (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert); | |
0f64bb02 | 1950 | |
c96a8570 BS |
1951 | if (! loc) |
1952 | return NULL; | |
0f64bb02 | 1953 | |
c96a8570 BS |
1954 | if (*loc) |
1955 | return *loc; | |
0f64bb02 | 1956 | |
c96a8570 | 1957 | *loc = bfd_zalloc (abfd, sizeof (**loc)); |
0f64bb02 | 1958 | |
c96a8570 BS |
1959 | if (! *loc) |
1960 | return *loc; | |
0f64bb02 | 1961 | |
c96a8570 BS |
1962 | (*loc)->symndx = entry->symndx; |
1963 | (*loc)->d = entry->d; | |
1964 | (*loc)->addend = entry->addend; | |
1965 | (*loc)->plt_entry = (bfd_vma)-1; | |
1966 | (*loc)->lzplt_entry = (bfd_vma)-1; | |
0f64bb02 | 1967 | |
c96a8570 BS |
1968 | return *loc; |
1969 | } | |
48d502e1 | 1970 | |
c96a8570 BS |
1971 | /* Obtain the address of the entry in HT associated with H's symbol + |
1972 | addend, creating a new entry if none existed. ABFD is only used | |
1973 | for memory allocation purposes. */ | |
1974 | inline static struct bfinfdpic_relocs_info * | |
1975 | bfinfdpic_relocs_info_for_global (struct htab *ht, | |
1976 | bfd *abfd, | |
1977 | struct elf_link_hash_entry *h, | |
1978 | bfd_vma addend, | |
1979 | enum insert_option insert) | |
1980 | { | |
1981 | struct bfinfdpic_relocs_info entry; | |
0f64bb02 | 1982 | |
c96a8570 BS |
1983 | entry.symndx = -1; |
1984 | entry.d.h = h; | |
1985 | entry.addend = addend; | |
f4707595 | 1986 | |
c96a8570 BS |
1987 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
1988 | } | |
48d502e1 | 1989 | |
c96a8570 BS |
1990 | /* Obtain the address of the entry in HT associated with the SYMNDXth |
1991 | local symbol of the input bfd ABFD, plus the addend, creating a new | |
1992 | entry if none existed. */ | |
1993 | inline static struct bfinfdpic_relocs_info * | |
1994 | bfinfdpic_relocs_info_for_local (struct htab *ht, | |
1995 | bfd *abfd, | |
1996 | long symndx, | |
1997 | bfd_vma addend, | |
1998 | enum insert_option insert) | |
1999 | { | |
2000 | struct bfinfdpic_relocs_info entry; | |
ab96bf03 | 2001 | |
c96a8570 BS |
2002 | entry.symndx = symndx; |
2003 | entry.d.abfd = abfd; | |
2004 | entry.addend = addend; | |
48d502e1 | 2005 | |
c96a8570 BS |
2006 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
2007 | } | |
48d502e1 | 2008 | |
c96a8570 BS |
2009 | /* Merge fields set by check_relocs() of two entries that end up being |
2010 | mapped to the same (presumably global) symbol. */ | |
0f64bb02 | 2011 | |
c96a8570 BS |
2012 | inline static void |
2013 | bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2, | |
2014 | struct bfinfdpic_relocs_info const *e1) | |
2015 | { | |
2016 | e2->got17m4 |= e1->got17m4; | |
2017 | e2->gothilo |= e1->gothilo; | |
2018 | e2->fd |= e1->fd; | |
2019 | e2->fdgot17m4 |= e1->fdgot17m4; | |
2020 | e2->fdgothilo |= e1->fdgothilo; | |
2021 | e2->fdgoff17m4 |= e1->fdgoff17m4; | |
2022 | e2->fdgoffhilo |= e1->fdgoffhilo; | |
2023 | e2->gotoff |= e1->gotoff; | |
2024 | e2->call |= e1->call; | |
2025 | e2->sym |= e1->sym; | |
2026 | } | |
48d502e1 | 2027 | |
c96a8570 BS |
2028 | /* Every block of 65535 lazy PLT entries shares a single call to the |
2029 | resolver, inserted in the 32768th lazy PLT entry (i.e., entry # | |
2030 | 32767, counting from 0). All other lazy PLT entries branch to it | |
2031 | in a single instruction. */ | |
48d502e1 | 2032 | |
c96a8570 BS |
2033 | #define LZPLT_RESOLVER_EXTRA 10 |
2034 | #define LZPLT_NORMAL_SIZE 6 | |
2035 | #define LZPLT_ENTRIES 1362 | |
48d502e1 | 2036 | |
c96a8570 BS |
2037 | #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA) |
2038 | #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2) | |
48d502e1 | 2039 | |
c96a8570 | 2040 | /* Add a dynamic relocation to the SRELOC section. */ |
48d502e1 | 2041 | |
c96a8570 BS |
2042 | inline static bfd_vma |
2043 | _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset, | |
2044 | int reloc_type, long dynindx, bfd_vma addend, | |
2045 | struct bfinfdpic_relocs_info *entry) | |
2046 | { | |
2047 | Elf_Internal_Rela outrel; | |
2048 | bfd_vma reloc_offset; | |
0f64bb02 | 2049 | |
c96a8570 BS |
2050 | outrel.r_offset = offset; |
2051 | outrel.r_info = ELF32_R_INFO (dynindx, reloc_type); | |
2052 | outrel.r_addend = addend; | |
48d502e1 | 2053 | |
c96a8570 BS |
2054 | reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel); |
2055 | BFD_ASSERT (reloc_offset < sreloc->size); | |
2056 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
2057 | sreloc->contents + reloc_offset); | |
2058 | sreloc->reloc_count++; | |
48d502e1 | 2059 | |
c96a8570 BS |
2060 | /* If the entry's index is zero, this relocation was probably to a |
2061 | linkonce section that got discarded. We reserved a dynamic | |
2062 | relocation, but it was for another entry than the one we got at | |
2063 | the time of emitting the relocation. Unfortunately there's no | |
2064 | simple way for us to catch this situation, since the relocation | |
2065 | is cleared right before calling relocate_section, at which point | |
2066 | we no longer know what the relocation used to point to. */ | |
2067 | if (entry->symndx) | |
2068 | { | |
2069 | BFD_ASSERT (entry->dynrelocs > 0); | |
2070 | entry->dynrelocs--; | |
2071 | } | |
48d502e1 | 2072 | |
c96a8570 BS |
2073 | return reloc_offset; |
2074 | } | |
0f64bb02 | 2075 | |
c96a8570 | 2076 | /* Add a fixup to the ROFIXUP section. */ |
48d502e1 | 2077 | |
c96a8570 BS |
2078 | static bfd_vma |
2079 | _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset, | |
2080 | struct bfinfdpic_relocs_info *entry) | |
2081 | { | |
2082 | bfd_vma fixup_offset; | |
8aafe8b4 | 2083 | |
c96a8570 BS |
2084 | if (rofixup->flags & SEC_EXCLUDE) |
2085 | return -1; | |
0f64bb02 | 2086 | |
c96a8570 BS |
2087 | fixup_offset = rofixup->reloc_count * 4; |
2088 | if (rofixup->contents) | |
2089 | { | |
2090 | BFD_ASSERT (fixup_offset < rofixup->size); | |
2091 | bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset); | |
2092 | } | |
2093 | rofixup->reloc_count++; | |
0f64bb02 | 2094 | |
c96a8570 BS |
2095 | if (entry && entry->symndx) |
2096 | { | |
2097 | /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc | |
2098 | above. */ | |
2099 | BFD_ASSERT (entry->fixups > 0); | |
2100 | entry->fixups--; | |
2101 | } | |
f4707595 | 2102 | |
c96a8570 BS |
2103 | return fixup_offset; |
2104 | } | |
0f64bb02 | 2105 | |
c96a8570 BS |
2106 | /* Find the segment number in which OSEC, and output section, is |
2107 | located. */ | |
ca889129 | 2108 | |
c96a8570 BS |
2109 | static unsigned |
2110 | _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec) | |
2111 | { | |
2112 | Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec); | |
0f64bb02 | 2113 | |
c96a8570 BS |
2114 | return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1; |
2115 | } | |
2116 | ||
2117 | inline static bfd_boolean | |
2118 | _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec) | |
2119 | { | |
2120 | unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec); | |
2121 | ||
2122 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); | |
2123 | } | |
2124 | ||
2125 | /* Generate relocations for GOT entries, function descriptors, and | |
2126 | code for PLT and lazy PLT entries. */ | |
2127 | ||
2128 | inline static bfd_boolean | |
2129 | _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry, | |
2130 | bfd *output_bfd, | |
2131 | struct bfd_link_info *info, | |
2132 | asection *sec, | |
2133 | Elf_Internal_Sym *sym, | |
2134 | bfd_vma addend) | |
2135 | ||
2136 | { | |
2137 | bfd_vma fd_lazy_rel_offset = (bfd_vma)-1; | |
2138 | int dynindx = -1; | |
2139 | ||
2140 | if (entry->done) | |
2141 | return TRUE; | |
2142 | entry->done = 1; | |
2143 | ||
2144 | if (entry->got_entry || entry->fdgot_entry || entry->fd_entry) | |
2145 | { | |
2146 | /* If the symbol is dynamic, consider it for dynamic | |
2147 | relocations, otherwise decay to section + offset. */ | |
2148 | if (entry->symndx == -1 && entry->d.h->dynindx != -1) | |
2149 | dynindx = entry->d.h->dynindx; | |
2150 | else | |
2151 | { | |
2152 | if (sec->output_section | |
2153 | && ! bfd_is_abs_section (sec->output_section) | |
2154 | && ! bfd_is_und_section (sec->output_section)) | |
2155 | dynindx = elf_section_data (sec->output_section)->dynindx; | |
2156 | else | |
2157 | dynindx = 0; | |
2158 | } | |
2159 | } | |
2160 | ||
2161 | /* Generate relocation for GOT entry pointing to the symbol. */ | |
2162 | if (entry->got_entry) | |
2163 | { | |
2164 | int idx = dynindx; | |
2165 | bfd_vma ad = addend; | |
2166 | ||
2167 | /* If the symbol is dynamic but binds locally, use | |
2168 | section+offset. */ | |
2169 | if (sec && (entry->symndx != -1 | |
2170 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2171 | { | |
2172 | if (entry->symndx == -1) | |
2173 | ad += entry->d.h->root.u.def.value; | |
2174 | else | |
2175 | ad += sym->st_value; | |
2176 | ad += sec->output_offset; | |
2177 | if (sec->output_section && elf_section_data (sec->output_section)) | |
2178 | idx = elf_section_data (sec->output_section)->dynindx; | |
2179 | else | |
2180 | idx = 0; | |
2181 | } | |
2182 | ||
2183 | /* If we're linking an executable at a fixed address, we can | |
2184 | omit the dynamic relocation as long as the symbol is local to | |
2185 | this module. */ | |
2186 | if (info->executable && !info->pie | |
2187 | && (entry->symndx != -1 | |
2188 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2189 | { | |
2190 | if (sec) | |
2191 | ad += sec->output_section->vma; | |
2192 | if (entry->symndx != -1 | |
2193 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
2194 | _bfinfdpic_add_rofixup (output_bfd, | |
2195 | bfinfdpic_gotfixup_section (info), | |
2196 | bfinfdpic_got_section (info)->output_section | |
2197 | ->vma | |
2198 | + bfinfdpic_got_section (info)->output_offset | |
2199 | + bfinfdpic_got_initial_offset (info) | |
2200 | + entry->got_entry, entry); | |
2201 | } | |
2202 | else | |
2203 | _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info), | |
2204 | _bfd_elf_section_offset | |
2205 | (output_bfd, info, | |
2206 | bfinfdpic_got_section (info), | |
2207 | bfinfdpic_got_initial_offset (info) | |
2208 | + entry->got_entry) | |
2209 | + bfinfdpic_got_section (info) | |
2210 | ->output_section->vma | |
2211 | + bfinfdpic_got_section (info)->output_offset, | |
2212 | R_byte4_data, idx, ad, entry); | |
2213 | ||
2214 | bfd_put_32 (output_bfd, ad, | |
2215 | bfinfdpic_got_section (info)->contents | |
2216 | + bfinfdpic_got_initial_offset (info) | |
2217 | + entry->got_entry); | |
2218 | } | |
2219 | ||
2220 | /* Generate relocation for GOT entry pointing to a canonical | |
2221 | function descriptor. */ | |
2222 | if (entry->fdgot_entry) | |
2223 | { | |
2224 | int reloc, idx; | |
2225 | bfd_vma ad = 0; | |
2226 | ||
2227 | if (! (entry->symndx == -1 | |
2228 | && entry->d.h->root.type == bfd_link_hash_undefweak | |
2229 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2230 | { | |
2231 | /* If the symbol is dynamic and there may be dynamic symbol | |
2232 | resolution because we are, or are linked with, a shared | |
2233 | library, emit a FUNCDESC relocation such that the dynamic | |
2234 | linker will allocate the function descriptor. If the | |
2235 | symbol needs a non-local function descriptor but binds | |
2236 | locally (e.g., its visibility is protected, emit a | |
2237 | dynamic relocation decayed to section+offset. */ | |
2238 | if (entry->symndx == -1 | |
2239 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h) | |
2240 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h) | |
2241 | && !(info->executable && !info->pie)) | |
2242 | { | |
2243 | reloc = R_BFIN_FUNCDESC; | |
2244 | idx = elf_section_data (entry->d.h->root.u.def.section | |
2245 | ->output_section)->dynindx; | |
2246 | ad = entry->d.h->root.u.def.section->output_offset | |
2247 | + entry->d.h->root.u.def.value; | |
2248 | } | |
2249 | else if (entry->symndx == -1 | |
2250 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)) | |
2251 | { | |
2252 | reloc = R_BFIN_FUNCDESC; | |
2253 | idx = dynindx; | |
2254 | ad = addend; | |
2255 | if (ad) | |
2256 | return FALSE; | |
2257 | } | |
2258 | else | |
2259 | { | |
2260 | /* Otherwise, we know we have a private function descriptor, | |
2261 | so reference it directly. */ | |
2262 | if (elf_hash_table (info)->dynamic_sections_created) | |
2263 | BFD_ASSERT (entry->privfd); | |
2264 | reloc = R_byte4_data; | |
2265 | idx = elf_section_data (bfinfdpic_got_section (info) | |
2266 | ->output_section)->dynindx; | |
2267 | ad = bfinfdpic_got_section (info)->output_offset | |
2268 | + bfinfdpic_got_initial_offset (info) + entry->fd_entry; | |
2269 | } | |
2270 | ||
2271 | /* If there is room for dynamic symbol resolution, emit the | |
2272 | dynamic relocation. However, if we're linking an | |
2273 | executable at a fixed location, we won't have emitted a | |
2274 | dynamic symbol entry for the got section, so idx will be | |
2275 | zero, which means we can and should compute the address | |
2276 | of the private descriptor ourselves. */ | |
2277 | if (info->executable && !info->pie | |
2278 | && (entry->symndx != -1 | |
2279 | || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))) | |
2280 | { | |
2281 | ad += bfinfdpic_got_section (info)->output_section->vma; | |
2282 | _bfinfdpic_add_rofixup (output_bfd, | |
2283 | bfinfdpic_gotfixup_section (info), | |
2284 | bfinfdpic_got_section (info) | |
2285 | ->output_section->vma | |
2286 | + bfinfdpic_got_section (info) | |
2287 | ->output_offset | |
2288 | + bfinfdpic_got_initial_offset (info) | |
2289 | + entry->fdgot_entry, entry); | |
2290 | } | |
2291 | else | |
2292 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
2293 | bfinfdpic_gotrel_section (info), | |
2294 | _bfd_elf_section_offset | |
2295 | (output_bfd, info, | |
2296 | bfinfdpic_got_section (info), | |
2297 | bfinfdpic_got_initial_offset (info) | |
2298 | + entry->fdgot_entry) | |
2299 | + bfinfdpic_got_section (info) | |
2300 | ->output_section->vma | |
2301 | + bfinfdpic_got_section (info) | |
2302 | ->output_offset, | |
2303 | reloc, idx, ad, entry); | |
2304 | } | |
f4707595 | 2305 | |
c96a8570 BS |
2306 | bfd_put_32 (output_bfd, ad, |
2307 | bfinfdpic_got_section (info)->contents | |
2308 | + bfinfdpic_got_initial_offset (info) | |
2309 | + entry->fdgot_entry); | |
2310 | } | |
2311 | ||
2312 | /* Generate relocation to fill in a private function descriptor in | |
2313 | the GOT. */ | |
2314 | if (entry->fd_entry) | |
2315 | { | |
2316 | int idx = dynindx; | |
2317 | bfd_vma ad = addend; | |
2318 | bfd_vma ofst; | |
2319 | long lowword, highword; | |
2320 | ||
2321 | /* If the symbol is dynamic but binds locally, use | |
2322 | section+offset. */ | |
2323 | if (sec && (entry->symndx != -1 | |
2324 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2325 | { | |
2326 | if (entry->symndx == -1) | |
2327 | ad += entry->d.h->root.u.def.value; | |
2328 | else | |
2329 | ad += sym->st_value; | |
2330 | ad += sec->output_offset; | |
2331 | if (sec->output_section && elf_section_data (sec->output_section)) | |
2332 | idx = elf_section_data (sec->output_section)->dynindx; | |
2333 | else | |
2334 | idx = 0; | |
48d502e1 | 2335 | } |
f4707595 | 2336 | |
c96a8570 BS |
2337 | /* If we're linking an executable at a fixed address, we can |
2338 | omit the dynamic relocation as long as the symbol is local to | |
2339 | this module. */ | |
2340 | if (info->executable && !info->pie | |
2341 | && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
48d502e1 | 2342 | { |
c96a8570 BS |
2343 | if (sec) |
2344 | ad += sec->output_section->vma; | |
2345 | ofst = 0; | |
2346 | if (entry->symndx != -1 | |
2347 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
2348 | { | |
2349 | _bfinfdpic_add_rofixup (output_bfd, | |
2350 | bfinfdpic_gotfixup_section (info), | |
2351 | bfinfdpic_got_section (info) | |
2352 | ->output_section->vma | |
2353 | + bfinfdpic_got_section (info) | |
2354 | ->output_offset | |
2355 | + bfinfdpic_got_initial_offset (info) | |
2356 | + entry->fd_entry, entry); | |
2357 | _bfinfdpic_add_rofixup (output_bfd, | |
2358 | bfinfdpic_gotfixup_section (info), | |
2359 | bfinfdpic_got_section (info) | |
2360 | ->output_section->vma | |
2361 | + bfinfdpic_got_section (info) | |
2362 | ->output_offset | |
2363 | + bfinfdpic_got_initial_offset (info) | |
2364 | + entry->fd_entry + 4, entry); | |
2365 | } | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | ofst | |
2370 | = _bfinfdpic_add_dyn_reloc (output_bfd, | |
2371 | entry->lazyplt | |
2372 | ? bfinfdpic_pltrel_section (info) | |
2373 | : bfinfdpic_gotrel_section (info), | |
2374 | _bfd_elf_section_offset | |
2375 | (output_bfd, info, | |
2376 | bfinfdpic_got_section (info), | |
2377 | bfinfdpic_got_initial_offset (info) | |
2378 | + entry->fd_entry) | |
2379 | + bfinfdpic_got_section (info) | |
2380 | ->output_section->vma | |
2381 | + bfinfdpic_got_section (info) | |
2382 | ->output_offset, | |
2383 | R_BFIN_FUNCDESC_VALUE, idx, ad, entry); | |
48d502e1 | 2384 | } |
f4707595 | 2385 | |
c96a8570 BS |
2386 | /* If we've omitted the dynamic relocation, just emit the fixed |
2387 | addresses of the symbol and of the local GOT base offset. */ | |
2388 | if (info->executable && !info->pie && sec && sec->output_section) | |
48d502e1 | 2389 | { |
c96a8570 BS |
2390 | lowword = ad; |
2391 | highword = bfinfdpic_got_section (info)->output_section->vma | |
2392 | + bfinfdpic_got_section (info)->output_offset | |
2393 | + bfinfdpic_got_initial_offset (info); | |
2394 | } | |
2395 | else if (entry->lazyplt) | |
2396 | { | |
2397 | if (ad) | |
2398 | return FALSE; | |
f4707595 | 2399 | |
c96a8570 | 2400 | fd_lazy_rel_offset = ofst; |
f4707595 | 2401 | |
c96a8570 BS |
2402 | /* A function descriptor used for lazy or local resolving is |
2403 | initialized such that its high word contains the output | |
2404 | section index in which the PLT entries are located, and | |
2405 | the low word contains the address of the lazy PLT entry | |
2406 | entry point, that must be within the memory region | |
2407 | assigned to that section. */ | |
2408 | lowword = entry->lzplt_entry + 4 | |
2409 | + bfinfdpic_plt_section (info)->output_offset | |
2410 | + bfinfdpic_plt_section (info)->output_section->vma; | |
2411 | highword = _bfinfdpic_osec_to_segment | |
2412 | (output_bfd, bfinfdpic_plt_section (info)->output_section); | |
2413 | } | |
2414 | else | |
2415 | { | |
2416 | /* A function descriptor for a local function gets the index | |
2417 | of the section. For a non-local function, it's | |
2418 | disregarded. */ | |
2419 | lowword = ad; | |
2420 | if (entry->symndx == -1 && entry->d.h->dynindx != -1 | |
2421 | && entry->d.h->dynindx == idx) | |
2422 | highword = 0; | |
2423 | else | |
2424 | highword = _bfinfdpic_osec_to_segment | |
2425 | (output_bfd, sec->output_section); | |
48d502e1 | 2426 | } |
f4707595 | 2427 | |
c96a8570 BS |
2428 | bfd_put_32 (output_bfd, lowword, |
2429 | bfinfdpic_got_section (info)->contents | |
2430 | + bfinfdpic_got_initial_offset (info) | |
2431 | + entry->fd_entry); | |
2432 | bfd_put_32 (output_bfd, highword, | |
2433 | bfinfdpic_got_section (info)->contents | |
2434 | + bfinfdpic_got_initial_offset (info) | |
2435 | + entry->fd_entry + 4); | |
2436 | } | |
2437 | ||
2438 | /* Generate code for the PLT entry. */ | |
2439 | if (entry->plt_entry != (bfd_vma) -1) | |
2440 | { | |
2441 | bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents | |
2442 | + entry->plt_entry; | |
2443 | ||
2444 | BFD_ASSERT (entry->fd_entry); | |
2445 | ||
2446 | /* Figure out what kind of PLT entry we need, depending on the | |
2447 | location of the function descriptor within the GOT. */ | |
2448 | if (entry->fd_entry >= -(1 << (18 - 1)) | |
2449 | && entry->fd_entry + 4 < (1 << (18 - 1))) | |
48d502e1 | 2450 | { |
c96a8570 BS |
2451 | /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */ |
2452 | bfd_put_32 (output_bfd, | |
2453 | 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000), | |
2454 | plt_code); | |
2455 | bfd_put_32 (output_bfd, | |
2456 | 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000), | |
2457 | plt_code + 4); | |
2458 | plt_code += 8; | |
2459 | } | |
2460 | else | |
2461 | { | |
2462 | /* P1.L = fd_entry; P1.H = fd_entry; | |
2463 | P3 = P3 + P1; | |
2464 | P1 = [P3]; | |
2465 | P3 = [P3 + 4]; */ | |
2466 | bfd_put_32 (output_bfd, | |
2467 | 0xe109 | (entry->fd_entry << 16), | |
2468 | plt_code); | |
2469 | bfd_put_32 (output_bfd, | |
2470 | 0xe149 | (entry->fd_entry & 0xFFFF0000), | |
2471 | plt_code + 4); | |
2472 | bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8); | |
2473 | bfd_put_16 (output_bfd, 0x9159, plt_code + 10); | |
2474 | bfd_put_16 (output_bfd, 0xac5b, plt_code + 12); | |
2475 | plt_code += 14; | |
2476 | } | |
2477 | /* JUMP (P1) */ | |
2478 | bfd_put_16 (output_bfd, 0x0051, plt_code); | |
2479 | } | |
f4707595 | 2480 | |
c96a8570 BS |
2481 | /* Generate code for the lazy PLT entry. */ |
2482 | if (entry->lzplt_entry != (bfd_vma) -1) | |
2483 | { | |
2484 | bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents | |
2485 | + entry->lzplt_entry; | |
2486 | bfd_vma resolverStub_addr; | |
0f64bb02 | 2487 | |
c96a8570 BS |
2488 | bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code); |
2489 | lzplt_code += 4; | |
0f64bb02 | 2490 | |
c96a8570 BS |
2491 | resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE |
2492 | * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC; | |
2493 | if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info)) | |
2494 | resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA; | |
0f64bb02 | 2495 | |
c96a8570 | 2496 | if (entry->lzplt_entry == resolverStub_addr) |
0f64bb02 | 2497 | { |
c96a8570 BS |
2498 | /* This is a lazy PLT entry that includes a resolver call. |
2499 | P2 = [P3]; | |
2500 | R3 = [P3 + 4]; | |
2501 | JUMP (P2); */ | |
2502 | bfd_put_32 (output_bfd, | |
2503 | 0xa05b915a, | |
2504 | lzplt_code); | |
2505 | bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4); | |
2506 | } | |
2507 | else | |
2508 | { | |
2509 | /* JUMP.S resolverStub */ | |
2510 | bfd_put_16 (output_bfd, | |
2511 | 0x2000 | |
2512 | | (((resolverStub_addr - entry->lzplt_entry) | |
2513 | / 2) & (((bfd_vma)1 << 12) - 1)), | |
2514 | lzplt_code); | |
2515 | } | |
2516 | } | |
0f64bb02 | 2517 | |
c96a8570 BS |
2518 | return TRUE; |
2519 | } | |
2520 | \f | |
2521 | /* Relocate an Blackfin ELF section. | |
48d502e1 | 2522 | |
c96a8570 BS |
2523 | The RELOCATE_SECTION function is called by the new ELF backend linker |
2524 | to handle the relocations for a section. | |
48d502e1 | 2525 | |
c96a8570 BS |
2526 | The relocs are always passed as Rela structures; if the section |
2527 | actually uses Rel structures, the r_addend field will always be | |
2528 | zero. | |
48d502e1 | 2529 | |
c96a8570 BS |
2530 | This function is responsible for adjusting the section contents as |
2531 | necessary, and (if using Rela relocs and generating a relocatable | |
2532 | output file) adjusting the reloc addend as necessary. | |
48d502e1 | 2533 | |
c96a8570 BS |
2534 | This function does not have to worry about setting the reloc |
2535 | address or the reloc symbol index. | |
48d502e1 | 2536 | |
c96a8570 | 2537 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
48d502e1 | 2538 | |
c96a8570 BS |
2539 | LOCAL_SECTIONS is an array giving the section in the input file |
2540 | corresponding to the st_shndx field of each local symbol. | |
48d502e1 | 2541 | |
c96a8570 BS |
2542 | The global hash table entry for the global symbols can be found |
2543 | via elf_sym_hashes (input_bfd). | |
48d502e1 | 2544 | |
c96a8570 BS |
2545 | When generating relocatable output, this function must handle |
2546 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
2547 | going to be the section symbol corresponding to the output | |
2548 | section, which means that the addend must be adjusted | |
2549 | accordingly. */ | |
48d502e1 BS |
2550 | |
2551 | static bfd_boolean | |
c96a8570 BS |
2552 | bfinfdpic_relocate_section (bfd * output_bfd, |
2553 | struct bfd_link_info *info, | |
2554 | bfd * input_bfd, | |
2555 | asection * input_section, | |
2556 | bfd_byte * contents, | |
2557 | Elf_Internal_Rela * relocs, | |
2558 | Elf_Internal_Sym * local_syms, | |
2559 | asection ** local_sections) | |
48d502e1 | 2560 | { |
48d502e1 BS |
2561 | Elf_Internal_Shdr *symtab_hdr; |
2562 | struct elf_link_hash_entry **sym_hashes; | |
48d502e1 BS |
2563 | Elf_Internal_Rela *rel; |
2564 | Elf_Internal_Rela *relend; | |
c96a8570 BS |
2565 | unsigned isec_segment, got_segment, plt_segment, |
2566 | check_segment[2]; | |
2567 | int silence_segment_error = !(info->shared || info->pie); | |
48d502e1 | 2568 | |
c96a8570 | 2569 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
48d502e1 | 2570 | sym_hashes = elf_sym_hashes (input_bfd); |
c96a8570 | 2571 | relend = relocs + input_section->reloc_count; |
48d502e1 | 2572 | |
c96a8570 BS |
2573 | isec_segment = _bfinfdpic_osec_to_segment (output_bfd, |
2574 | input_section->output_section); | |
2575 | if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info)) | |
2576 | got_segment = _bfinfdpic_osec_to_segment (output_bfd, | |
2577 | bfinfdpic_got_section (info) | |
2578 | ->output_section); | |
2579 | else | |
2580 | got_segment = -1; | |
2581 | if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created) | |
2582 | plt_segment = _bfinfdpic_osec_to_segment (output_bfd, | |
2583 | bfinfdpic_plt_section (info) | |
2584 | ->output_section); | |
2585 | else | |
2586 | plt_segment = -1; | |
48d502e1 | 2587 | |
c96a8570 | 2588 | for (rel = relocs; rel < relend; rel ++) |
48d502e1 | 2589 | { |
48d502e1 BS |
2590 | reloc_howto_type *howto; |
2591 | unsigned long r_symndx; | |
48d502e1 BS |
2592 | Elf_Internal_Sym *sym; |
2593 | asection *sec; | |
c96a8570 BS |
2594 | struct elf_link_hash_entry *h; |
2595 | bfd_vma relocation; | |
48d502e1 | 2596 | bfd_reloc_status_type r; |
c96a8570 BS |
2597 | const char * name = NULL; |
2598 | int r_type; | |
2599 | asection *osec; | |
2600 | struct bfinfdpic_relocs_info *picrel; | |
2601 | bfd_vma orig_addend = rel->r_addend; | |
48d502e1 BS |
2602 | |
2603 | r_type = ELF32_R_TYPE (rel->r_info); | |
48d502e1 | 2604 | |
c96a8570 BS |
2605 | if (r_type == R_BFIN_GNU_VTINHERIT |
2606 | || r_type == R_BFIN_GNU_VTENTRY) | |
48d502e1 BS |
2607 | continue; |
2608 | ||
c96a8570 | 2609 | r_symndx = ELF32_R_SYM (rel->r_info); |
48d502e1 BS |
2610 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
2611 | if (howto == NULL) | |
2612 | { | |
2613 | bfd_set_error (bfd_error_bad_value); | |
2614 | return FALSE; | |
2615 | } | |
48d502e1 | 2616 | |
c96a8570 BS |
2617 | h = NULL; |
2618 | sym = NULL; | |
2619 | sec = NULL; | |
2620 | ||
2621 | if (r_symndx < symtab_hdr->sh_info) | |
2622 | { | |
2623 | sym = local_syms + r_symndx; | |
2624 | osec = sec = local_sections [r_symndx]; | |
2625 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2626 | ||
2627 | name = bfd_elf_string_from_elf_section | |
2628 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
2629 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
2630 | } | |
2631 | else | |
2632 | { | |
2633 | bfd_boolean warned; | |
2634 | bfd_boolean unresolved_reloc; | |
2635 | ||
2636 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2637 | r_symndx, symtab_hdr, sym_hashes, | |
2638 | h, sec, relocation, | |
2639 | unresolved_reloc, warned); | |
2640 | osec = sec; | |
2641 | } | |
2642 | ||
2643 | if (sec != NULL && elf_discarded_section (sec)) | |
2644 | { | |
2645 | /* For relocs against symbols from removed linkonce sections, | |
2646 | or sections discarded by a linker script, we just want the | |
2647 | section contents zeroed. Avoid any special processing. */ | |
2648 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2649 | rel->r_info = 0; | |
2650 | rel->r_addend = 0; | |
2651 | continue; | |
2652 | } | |
2653 | ||
2654 | if (info->relocatable) | |
2655 | continue; | |
2656 | ||
2657 | if (h != NULL | |
2658 | && (h->root.type == bfd_link_hash_defined | |
2659 | || h->root.type == bfd_link_hash_defweak) | |
2660 | && !BFINFDPIC_SYM_LOCAL (info, h)) | |
2661 | { | |
2662 | osec = sec = NULL; | |
2663 | relocation = 0; | |
2664 | } | |
2665 | ||
2666 | switch (r_type) | |
2667 | { | |
2668 | case R_pcrel24: | |
2669 | case R_pcrel24_jump_l: | |
2670 | case R_byte4_data: | |
2671 | if (! IS_FDPIC (output_bfd)) | |
2672 | goto non_fdpic; | |
2673 | ||
2674 | case R_BFIN_GOT17M4: | |
2675 | case R_BFIN_GOTHI: | |
2676 | case R_BFIN_GOTLO: | |
2677 | case R_BFIN_FUNCDESC_GOT17M4: | |
2678 | case R_BFIN_FUNCDESC_GOTHI: | |
2679 | case R_BFIN_FUNCDESC_GOTLO: | |
2680 | case R_BFIN_GOTOFF17M4: | |
2681 | case R_BFIN_GOTOFFHI: | |
2682 | case R_BFIN_GOTOFFLO: | |
2683 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
2684 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
2685 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
2686 | case R_BFIN_FUNCDESC: | |
2687 | case R_BFIN_FUNCDESC_VALUE: | |
2688 | if (h != NULL) | |
2689 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info | |
2690 | (info), input_bfd, h, | |
2691 | orig_addend, INSERT); | |
2692 | else | |
2693 | /* In order to find the entry we created before, we must | |
2694 | use the original addend, not the one that may have been | |
2695 | modified by _bfd_elf_rela_local_sym(). */ | |
2696 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info | |
2697 | (info), input_bfd, r_symndx, | |
2698 | orig_addend, INSERT); | |
2699 | if (! picrel) | |
2700 | return FALSE; | |
2701 | ||
2702 | if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info, | |
2703 | osec, sym, | |
2704 | rel->r_addend)) | |
2705 | { | |
2706 | (*_bfd_error_handler) | |
2707 | (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"), | |
2708 | input_bfd, input_section, rel->r_offset, name); | |
2709 | return FALSE; | |
2710 | ||
2711 | } | |
48d502e1 | 2712 | |
c96a8570 | 2713 | break; |
ab96bf03 | 2714 | |
c96a8570 BS |
2715 | default: |
2716 | non_fdpic: | |
2717 | picrel = NULL; | |
2718 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) | |
2719 | { | |
2720 | info->callbacks->warning | |
2721 | (info, _("relocation references symbol not defined in the module"), | |
2722 | name, input_bfd, input_section, rel->r_offset); | |
2723 | return FALSE; | |
2724 | } | |
2725 | break; | |
48d502e1 BS |
2726 | } |
2727 | ||
c96a8570 | 2728 | switch (r_type) |
ab96bf03 | 2729 | { |
c96a8570 BS |
2730 | case R_pcrel24: |
2731 | case R_pcrel24_jump_l: | |
2732 | check_segment[0] = isec_segment; | |
2733 | if (! IS_FDPIC (output_bfd)) | |
2734 | check_segment[1] = isec_segment; | |
2735 | else if (picrel->plt) | |
2736 | { | |
2737 | relocation = bfinfdpic_plt_section (info)->output_section->vma | |
2738 | + bfinfdpic_plt_section (info)->output_offset | |
2739 | + picrel->plt_entry; | |
2740 | check_segment[1] = plt_segment; | |
2741 | } | |
2742 | /* We don't want to warn on calls to undefined weak symbols, | |
2743 | as calls to them must be protected by non-NULL tests | |
2744 | anyway, and unprotected calls would invoke undefined | |
2745 | behavior. */ | |
2746 | else if (picrel->symndx == -1 | |
2747 | && picrel->d.h->root.type == bfd_link_hash_undefweak) | |
2748 | check_segment[1] = check_segment[0]; | |
2749 | else | |
2750 | check_segment[1] = sec | |
2751 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) | |
2752 | : (unsigned)-1; | |
2753 | break; | |
ab96bf03 | 2754 | |
c96a8570 BS |
2755 | case R_BFIN_GOT17M4: |
2756 | case R_BFIN_GOTHI: | |
2757 | case R_BFIN_GOTLO: | |
2758 | relocation = picrel->got_entry; | |
2759 | check_segment[0] = check_segment[1] = got_segment; | |
2760 | break; | |
ab96bf03 | 2761 | |
c96a8570 BS |
2762 | case R_BFIN_FUNCDESC_GOT17M4: |
2763 | case R_BFIN_FUNCDESC_GOTHI: | |
2764 | case R_BFIN_FUNCDESC_GOTLO: | |
2765 | relocation = picrel->fdgot_entry; | |
2766 | check_segment[0] = check_segment[1] = got_segment; | |
2767 | break; | |
48d502e1 | 2768 | |
c96a8570 BS |
2769 | case R_BFIN_GOTOFFHI: |
2770 | case R_BFIN_GOTOFF17M4: | |
2771 | case R_BFIN_GOTOFFLO: | |
2772 | relocation -= bfinfdpic_got_section (info)->output_section->vma | |
2773 | + bfinfdpic_got_section (info)->output_offset | |
2774 | + bfinfdpic_got_initial_offset (info); | |
2775 | check_segment[0] = got_segment; | |
2776 | check_segment[1] = sec | |
2777 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) | |
2778 | : (unsigned)-1; | |
2779 | break; | |
48d502e1 | 2780 | |
c96a8570 BS |
2781 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
2782 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
2783 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
2784 | relocation = picrel->fd_entry; | |
2785 | check_segment[0] = check_segment[1] = got_segment; | |
2786 | break; | |
48d502e1 | 2787 | |
c96a8570 | 2788 | case R_BFIN_FUNCDESC: |
48d502e1 | 2789 | { |
c96a8570 BS |
2790 | int dynindx; |
2791 | bfd_vma addend = rel->r_addend; | |
48d502e1 | 2792 | |
c96a8570 BS |
2793 | if (! (h && h->root.type == bfd_link_hash_undefweak |
2794 | && BFINFDPIC_SYM_LOCAL (info, h))) | |
2795 | { | |
2796 | /* If the symbol is dynamic and there may be dynamic | |
2797 | symbol resolution because we are or are linked with a | |
2798 | shared library, emit a FUNCDESC relocation such that | |
2799 | the dynamic linker will allocate the function | |
2800 | descriptor. If the symbol needs a non-local function | |
2801 | descriptor but binds locally (e.g., its visibility is | |
2802 | protected, emit a dynamic relocation decayed to | |
2803 | section+offset. */ | |
2804 | if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h) | |
2805 | && BFINFDPIC_SYM_LOCAL (info, h) | |
2806 | && !(info->executable && !info->pie)) | |
2807 | { | |
2808 | dynindx = elf_section_data (h->root.u.def.section | |
2809 | ->output_section)->dynindx; | |
2810 | addend += h->root.u.def.section->output_offset | |
2811 | + h->root.u.def.value; | |
2812 | } | |
2813 | else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)) | |
2814 | { | |
2815 | if (addend) | |
2816 | { | |
2817 | info->callbacks->warning | |
2818 | (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"), | |
2819 | name, input_bfd, input_section, rel->r_offset); | |
2820 | return FALSE; | |
2821 | } | |
2822 | dynindx = h->dynindx; | |
2823 | } | |
2824 | else | |
2825 | { | |
2826 | /* Otherwise, we know we have a private function | |
2827 | descriptor, so reference it directly. */ | |
2828 | BFD_ASSERT (picrel->privfd); | |
2829 | r_type = R_byte4_data; | |
2830 | dynindx = elf_section_data (bfinfdpic_got_section (info) | |
2831 | ->output_section)->dynindx; | |
2832 | addend = bfinfdpic_got_section (info)->output_offset | |
2833 | + bfinfdpic_got_initial_offset (info) | |
2834 | + picrel->fd_entry; | |
2835 | } | |
2836 | ||
2837 | /* If there is room for dynamic symbol resolution, emit | |
2838 | the dynamic relocation. However, if we're linking an | |
2839 | executable at a fixed location, we won't have emitted a | |
2840 | dynamic symbol entry for the got section, so idx will | |
2841 | be zero, which means we can and should compute the | |
2842 | address of the private descriptor ourselves. */ | |
2843 | if (info->executable && !info->pie | |
2844 | && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h))) | |
2845 | { | |
2846 | addend += bfinfdpic_got_section (info)->output_section->vma; | |
2847 | if ((bfd_get_section_flags (output_bfd, | |
2848 | input_section->output_section) | |
2849 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
2850 | { | |
2851 | if (_bfinfdpic_osec_readonly_p (output_bfd, | |
2852 | input_section | |
2853 | ->output_section)) | |
2854 | { | |
2855 | info->callbacks->warning | |
2856 | (info, | |
2857 | _("cannot emit fixups in read-only section"), | |
2858 | name, input_bfd, input_section, rel->r_offset); | |
2859 | return FALSE; | |
2860 | } | |
2861 | _bfinfdpic_add_rofixup (output_bfd, | |
2862 | bfinfdpic_gotfixup_section | |
2863 | (info), | |
2864 | _bfd_elf_section_offset | |
2865 | (output_bfd, info, | |
2866 | input_section, rel->r_offset) | |
2867 | + input_section | |
2868 | ->output_section->vma | |
2869 | + input_section->output_offset, | |
2870 | picrel); | |
2871 | } | |
2872 | } | |
2873 | else if ((bfd_get_section_flags (output_bfd, | |
2874 | input_section->output_section) | |
2875 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
2876 | { | |
2877 | bfd_vma offset; | |
2878 | ||
2879 | if (_bfinfdpic_osec_readonly_p (output_bfd, | |
2880 | input_section | |
2881 | ->output_section)) | |
2882 | { | |
2883 | info->callbacks->warning | |
2884 | (info, | |
2885 | _("cannot emit dynamic relocations in read-only section"), | |
2886 | name, input_bfd, input_section, rel->r_offset); | |
2887 | return FALSE; | |
2888 | } | |
2889 | offset = _bfd_elf_section_offset (output_bfd, info, | |
2890 | input_section, rel->r_offset); | |
2891 | /* Only output a reloc for a not deleted entry. */ | |
2892 | if (offset >= (bfd_vma) -2) | |
2893 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
2894 | bfinfdpic_gotrel_section (info), | |
2895 | 0, | |
2896 | R_unused0, | |
2897 | dynindx, addend, picrel); | |
2898 | else | |
2899 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
2900 | bfinfdpic_gotrel_section (info), | |
2901 | offset + input_section | |
2902 | ->output_section->vma | |
2903 | + input_section->output_offset, | |
2904 | r_type, | |
2905 | dynindx, addend, picrel); | |
2906 | } | |
2907 | else | |
2908 | addend += bfinfdpic_got_section (info)->output_section->vma; | |
2909 | } | |
2910 | ||
2911 | /* We want the addend in-place because dynamic | |
2912 | relocations are REL. Setting relocation to it should | |
2913 | arrange for it to be installed. */ | |
2914 | relocation = addend - rel->r_addend; | |
2915 | } | |
2916 | check_segment[0] = check_segment[1] = got_segment; | |
2917 | break; | |
2918 | ||
2919 | case R_byte4_data: | |
2920 | if (! IS_FDPIC (output_bfd)) | |
7a84e3da | 2921 | { |
c96a8570 BS |
2922 | check_segment[0] = check_segment[1] = -1; |
2923 | break; | |
7a84e3da | 2924 | } |
c96a8570 BS |
2925 | /* Fall through. */ |
2926 | case R_BFIN_FUNCDESC_VALUE: | |
2927 | { | |
2928 | int dynindx; | |
2929 | bfd_vma addend = rel->r_addend; | |
2930 | bfd_vma offset; | |
2931 | offset = _bfd_elf_section_offset (output_bfd, info, | |
2932 | input_section, rel->r_offset); | |
7a84e3da | 2933 | |
c96a8570 BS |
2934 | /* If the symbol is dynamic but binds locally, use |
2935 | section+offset. */ | |
2936 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) | |
48d502e1 | 2937 | { |
c96a8570 BS |
2938 | if (addend && r_type == R_BFIN_FUNCDESC_VALUE) |
2939 | { | |
2940 | info->callbacks->warning | |
2941 | (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"), | |
2942 | name, input_bfd, input_section, rel->r_offset); | |
2943 | return FALSE; | |
2944 | } | |
2945 | dynindx = h->dynindx; | |
48d502e1 | 2946 | } |
c96a8570 | 2947 | else |
48d502e1 | 2948 | { |
c96a8570 BS |
2949 | if (h) |
2950 | addend += h->root.u.def.value; | |
2951 | else | |
2952 | addend += sym->st_value; | |
2953 | if (osec) | |
2954 | addend += osec->output_offset; | |
2955 | if (osec && osec->output_section | |
2956 | && ! bfd_is_abs_section (osec->output_section) | |
2957 | && ! bfd_is_und_section (osec->output_section)) | |
2958 | dynindx = elf_section_data (osec->output_section)->dynindx; | |
2959 | else | |
2960 | dynindx = 0; | |
2961 | } | |
48d502e1 | 2962 | |
c96a8570 BS |
2963 | /* If we're linking an executable at a fixed address, we |
2964 | can omit the dynamic relocation as long as the symbol | |
2965 | is defined in the current link unit (which is implied | |
2966 | by its output section not being NULL). */ | |
2967 | if (info->executable && !info->pie | |
2968 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) | |
2969 | { | |
2970 | if (osec) | |
2971 | addend += osec->output_section->vma; | |
2972 | if (IS_FDPIC (input_bfd) | |
2973 | && (bfd_get_section_flags (output_bfd, | |
2974 | input_section->output_section) | |
2975 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
48d502e1 | 2976 | { |
c96a8570 BS |
2977 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
2978 | input_section | |
2979 | ->output_section)) | |
48d502e1 | 2980 | { |
c96a8570 BS |
2981 | info->callbacks->warning |
2982 | (info, | |
2983 | _("cannot emit fixups in read-only section"), | |
2984 | name, input_bfd, input_section, rel->r_offset); | |
2985 | return FALSE; | |
2986 | } | |
2987 | if (!h || h->root.type != bfd_link_hash_undefweak) | |
2988 | { | |
2989 | /* Only output a reloc for a not deleted entry. */ | |
2990 | if (offset >= (bfd_vma)-2) | |
2991 | _bfinfdpic_add_rofixup (output_bfd, | |
2992 | bfinfdpic_gotfixup_section | |
2993 | (info), -1, picrel); | |
2994 | else | |
2995 | _bfinfdpic_add_rofixup (output_bfd, | |
2996 | bfinfdpic_gotfixup_section | |
2997 | (info), | |
2998 | offset + input_section | |
2999 | ->output_section->vma | |
3000 | + input_section->output_offset, | |
3001 | picrel); | |
3002 | ||
3003 | if (r_type == R_BFIN_FUNCDESC_VALUE) | |
3004 | { | |
3005 | if (offset >= (bfd_vma)-2) | |
3006 | _bfinfdpic_add_rofixup | |
3007 | (output_bfd, | |
3008 | bfinfdpic_gotfixup_section (info), | |
3009 | -1, picrel); | |
3010 | else | |
3011 | _bfinfdpic_add_rofixup | |
3012 | (output_bfd, | |
3013 | bfinfdpic_gotfixup_section (info), | |
3014 | offset + input_section->output_section->vma | |
3015 | + input_section->output_offset + 4, picrel); | |
3016 | } | |
48d502e1 BS |
3017 | } |
3018 | } | |
48d502e1 BS |
3019 | } |
3020 | else | |
3021 | { | |
c96a8570 BS |
3022 | if ((bfd_get_section_flags (output_bfd, |
3023 | input_section->output_section) | |
3024 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
48d502e1 | 3025 | { |
c96a8570 BS |
3026 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
3027 | input_section | |
3028 | ->output_section)) | |
48d502e1 | 3029 | { |
c96a8570 BS |
3030 | info->callbacks->warning |
3031 | (info, | |
3032 | _("cannot emit dynamic relocations in read-only section"), | |
3033 | name, input_bfd, input_section, rel->r_offset); | |
3034 | return FALSE; | |
48d502e1 | 3035 | } |
c96a8570 BS |
3036 | /* Only output a reloc for a not deleted entry. */ |
3037 | if (offset >= (bfd_vma)-2) | |
3038 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
3039 | bfinfdpic_gotrel_section (info), | |
3040 | 0, R_unused0, dynindx, addend, picrel); | |
3041 | else | |
3042 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
3043 | bfinfdpic_gotrel_section (info), | |
3044 | offset | |
3045 | + input_section | |
3046 | ->output_section->vma | |
3047 | + input_section->output_offset, | |
3048 | r_type, dynindx, addend, picrel); | |
48d502e1 | 3049 | } |
c96a8570 BS |
3050 | else if (osec) |
3051 | addend += osec->output_section->vma; | |
3052 | /* We want the addend in-place because dynamic | |
3053 | relocations are REL. Setting relocation to it | |
3054 | should arrange for it to be installed. */ | |
3055 | relocation = addend - rel->r_addend; | |
3056 | } | |
3057 | ||
3058 | if (r_type == R_BFIN_FUNCDESC_VALUE && offset < (bfd_vma)-2) | |
3059 | { | |
3060 | /* If we've omitted the dynamic relocation, just emit | |
3061 | the fixed addresses of the symbol and of the local | |
3062 | GOT base offset. */ | |
3063 | if (info->executable && !info->pie | |
3064 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) | |
3065 | bfd_put_32 (output_bfd, | |
3066 | bfinfdpic_got_section (info)->output_section->vma | |
3067 | + bfinfdpic_got_section (info)->output_offset | |
3068 | + bfinfdpic_got_initial_offset (info), | |
3069 | contents + rel->r_offset + 4); | |
3070 | else | |
3071 | /* A function descriptor used for lazy or local | |
3072 | resolving is initialized such that its high word | |
3073 | contains the output section index in which the | |
3074 | PLT entries are located, and the low word | |
3075 | contains the offset of the lazy PLT entry entry | |
3076 | point into that section. */ | |
3077 | bfd_put_32 (output_bfd, | |
3078 | h && ! BFINFDPIC_SYM_LOCAL (info, h) | |
3079 | ? 0 | |
3080 | : _bfinfdpic_osec_to_segment (output_bfd, | |
3081 | sec | |
3082 | ->output_section), | |
3083 | contents + rel->r_offset + 4); | |
48d502e1 | 3084 | } |
c96a8570 BS |
3085 | } |
3086 | check_segment[0] = check_segment[1] = got_segment; | |
3087 | break; | |
3088 | ||
3089 | default: | |
3090 | check_segment[0] = isec_segment; | |
3091 | check_segment[1] = sec | |
3092 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) | |
3093 | : (unsigned)-1; | |
3094 | break; | |
3095 | } | |
3096 | ||
3097 | if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd)) | |
3098 | { | |
3099 | #if 1 /* If you take this out, remove the #error from fdpic-static-6.d | |
3100 | in the ld testsuite. */ | |
3101 | /* This helps catch problems in GCC while we can't do more | |
3102 | than static linking. The idea is to test whether the | |
3103 | input file basename is crt0.o only once. */ | |
3104 | if (silence_segment_error == 1) | |
3105 | silence_segment_error = | |
3106 | (strlen (input_bfd->filename) == 6 | |
3107 | && strcmp (input_bfd->filename, "crt0.o") == 0) | |
3108 | || (strlen (input_bfd->filename) > 6 | |
3109 | && strcmp (input_bfd->filename | |
3110 | + strlen (input_bfd->filename) - 7, | |
3111 | "/crt0.o") == 0) | |
3112 | ? -1 : 0; | |
3113 | #endif | |
3114 | if (!silence_segment_error | |
3115 | /* We don't want duplicate errors for undefined | |
3116 | symbols. */ | |
3117 | && !(picrel && picrel->symndx == -1 | |
3118 | && picrel->d.h->root.type == bfd_link_hash_undefined)) | |
3119 | info->callbacks->warning | |
3120 | (info, | |
3121 | (info->shared || info->pie) | |
3122 | ? _("relocations between different segments are not supported") | |
3123 | : _("warning: relocation references a different segment"), | |
3124 | name, input_bfd, input_section, rel->r_offset); | |
3125 | if (!silence_segment_error && (info->shared || info->pie)) | |
3126 | return FALSE; | |
3127 | elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC; | |
3128 | } | |
3129 | ||
3130 | switch (r_type) | |
3131 | { | |
3132 | case R_BFIN_GOTOFFHI: | |
3133 | /* We need the addend to be applied before we shift the | |
3134 | value right. */ | |
3135 | relocation += rel->r_addend; | |
3136 | /* Fall through. */ | |
3137 | case R_BFIN_GOTHI: | |
3138 | case R_BFIN_FUNCDESC_GOTHI: | |
3139 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
3140 | relocation >>= 16; | |
3141 | /* Fall through. */ | |
48d502e1 | 3142 | |
c96a8570 BS |
3143 | case R_BFIN_GOTLO: |
3144 | case R_BFIN_FUNCDESC_GOTLO: | |
3145 | case R_BFIN_GOTOFFLO: | |
3146 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
3147 | relocation &= 0xffff; | |
3148 | break; | |
48d502e1 | 3149 | |
48d502e1 | 3150 | default: |
48d502e1 BS |
3151 | break; |
3152 | } | |
3153 | ||
c96a8570 | 3154 | switch (r_type) |
48d502e1 | 3155 | { |
c96a8570 BS |
3156 | case R_pcrel24: |
3157 | case R_pcrel24_jump_l: | |
3158 | if (! IS_FDPIC (output_bfd) || ! picrel->plt) | |
3159 | break; | |
3160 | /* Fall through. */ | |
3161 | ||
3162 | /* When referencing a GOT entry, a function descriptor or a | |
3163 | PLT, we don't want the addend to apply to the reference, | |
3164 | but rather to the referenced symbol. The actual entry | |
3165 | will have already been created taking the addend into | |
3166 | account, so cancel it out here. */ | |
3167 | case R_BFIN_GOT17M4: | |
3168 | case R_BFIN_GOTHI: | |
3169 | case R_BFIN_GOTLO: | |
3170 | case R_BFIN_FUNCDESC_GOT17M4: | |
3171 | case R_BFIN_FUNCDESC_GOTHI: | |
3172 | case R_BFIN_FUNCDESC_GOTLO: | |
3173 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
3174 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
3175 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
3176 | /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4 | |
3177 | here, since we do want to apply the addend to the others. | |
3178 | Note that we've applied the addend to GOTOFFHI before we | |
3179 | shifted it right. */ | |
3180 | case R_BFIN_GOTOFFHI: | |
3181 | relocation -= rel->r_addend; | |
3182 | break; | |
3183 | ||
3184 | default: | |
3185 | break; | |
48d502e1 BS |
3186 | } |
3187 | ||
c96a8570 BS |
3188 | r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, |
3189 | contents, rel->r_offset, | |
3190 | relocation, rel->r_addend); | |
3191 | ||
48d502e1 BS |
3192 | if (r != bfd_reloc_ok) |
3193 | { | |
c96a8570 | 3194 | const char * msg = (const char *) NULL; |
48d502e1 | 3195 | |
c96a8570 | 3196 | switch (r) |
48d502e1 | 3197 | { |
c96a8570 BS |
3198 | case bfd_reloc_overflow: |
3199 | r = info->callbacks->reloc_overflow | |
3200 | (info, (h ? &h->root : NULL), name, howto->name, | |
3201 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3202 | break; | |
0f64bb02 | 3203 | |
c96a8570 BS |
3204 | case bfd_reloc_undefined: |
3205 | r = info->callbacks->undefined_symbol | |
3206 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
3207 | break; | |
3208 | ||
3209 | case bfd_reloc_outofrange: | |
3210 | msg = _("internal error: out of range error"); | |
3211 | break; | |
3212 | ||
3213 | case bfd_reloc_notsupported: | |
3214 | msg = _("internal error: unsupported relocation error"); | |
3215 | break; | |
3216 | ||
3217 | case bfd_reloc_dangerous: | |
3218 | msg = _("internal error: dangerous relocation"); | |
3219 | break; | |
3220 | ||
3221 | default: | |
3222 | msg = _("internal error: unknown error"); | |
3223 | break; | |
48d502e1 | 3224 | } |
c96a8570 BS |
3225 | |
3226 | if (msg) | |
3227 | r = info->callbacks->warning | |
3228 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
3229 | ||
3230 | if (! r) | |
3231 | return FALSE; | |
48d502e1 BS |
3232 | } |
3233 | } | |
3234 | ||
3235 | return TRUE; | |
3236 | } | |
3237 | ||
2774f1a6 BS |
3238 | /* Update the relocation information for the relocations of the section |
3239 | being removed. */ | |
3240 | ||
3241 | static bfd_boolean | |
3242 | bfinfdpic_gc_sweep_hook (bfd *abfd, | |
3243 | struct bfd_link_info *info, | |
3244 | asection *sec, | |
3245 | const Elf_Internal_Rela *relocs) | |
3246 | { | |
3247 | Elf_Internal_Shdr *symtab_hdr; | |
3248 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
3249 | const Elf_Internal_Rela *rel; | |
3250 | const Elf_Internal_Rela *rel_end; | |
3251 | struct bfinfdpic_relocs_info *picrel; | |
3252 | ||
3253 | BFD_ASSERT (IS_FDPIC (abfd)); | |
3254 | ||
3255 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3256 | sym_hashes = elf_sym_hashes (abfd); | |
3257 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); | |
3258 | if (!elf_bad_symtab (abfd)) | |
3259 | sym_hashes_end -= symtab_hdr->sh_info; | |
3260 | ||
3261 | rel_end = relocs + sec->reloc_count; | |
3262 | for (rel = relocs; rel < rel_end; rel++) | |
3263 | { | |
3264 | struct elf_link_hash_entry *h; | |
3265 | unsigned long r_symndx; | |
3266 | ||
3267 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3268 | if (r_symndx < symtab_hdr->sh_info) | |
3269 | h = NULL; | |
3270 | else | |
3271 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
3272 | ||
3273 | if (h != NULL) | |
3274 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), | |
3275 | abfd, h, | |
3276 | rel->r_addend, NO_INSERT); | |
3277 | else | |
3278 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info | |
3279 | (info), abfd, r_symndx, | |
3280 | rel->r_addend, NO_INSERT); | |
3281 | ||
3282 | if (!picrel) | |
3283 | return TRUE; | |
3284 | ||
3285 | switch (ELF32_R_TYPE (rel->r_info)) | |
3286 | { | |
3287 | case R_pcrel24: | |
3288 | case R_pcrel24_jump_l: | |
3289 | picrel->call--; | |
3290 | break; | |
3291 | ||
3292 | case R_BFIN_FUNCDESC_VALUE: | |
3293 | picrel->relocsfdv--; | |
3294 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) | |
3295 | picrel->relocs32++; | |
3296 | /* Fall through. */ | |
3297 | ||
3298 | case R_byte4_data: | |
3299 | picrel->sym--; | |
3300 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) | |
3301 | picrel->relocs32--; | |
3302 | break; | |
3303 | ||
3304 | case R_BFIN_GOT17M4: | |
3305 | picrel->got17m4--; | |
3306 | break; | |
3307 | ||
3308 | case R_BFIN_GOTHI: | |
3309 | case R_BFIN_GOTLO: | |
3310 | picrel->gothilo--; | |
3311 | break; | |
3312 | ||
3313 | case R_BFIN_FUNCDESC_GOT17M4: | |
3314 | picrel->fdgot17m4--; | |
3315 | break; | |
3316 | ||
3317 | case R_BFIN_FUNCDESC_GOTHI: | |
3318 | case R_BFIN_FUNCDESC_GOTLO: | |
3319 | picrel->fdgothilo--; | |
3320 | break; | |
3321 | ||
3322 | case R_BFIN_GOTOFF17M4: | |
3323 | case R_BFIN_GOTOFFHI: | |
3324 | case R_BFIN_GOTOFFLO: | |
3325 | picrel->gotoff--; | |
3326 | break; | |
3327 | ||
3328 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
3329 | picrel->fdgoff17m4--; | |
3330 | break; | |
3331 | ||
3332 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
3333 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
3334 | picrel->fdgoffhilo--; | |
3335 | break; | |
3336 | ||
3337 | case R_BFIN_FUNCDESC: | |
3338 | picrel->fd--; | |
3339 | picrel->relocsfd--; | |
3340 | break; | |
3341 | ||
3342 | default: | |
3343 | break; | |
3344 | } | |
3345 | } | |
3346 | ||
3347 | return TRUE; | |
3348 | } | |
3349 | ||
48d502e1 BS |
3350 | /* We need dynamic symbols for every section, since segments can |
3351 | relocate independently. */ | |
3352 | static bfd_boolean | |
3353 | _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
51408ec2 AM |
3354 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
3355 | asection *p) | |
48d502e1 BS |
3356 | { |
3357 | switch (elf_section_data (p)->this_hdr.sh_type) | |
3358 | { | |
3359 | case SHT_PROGBITS: | |
3360 | case SHT_NOBITS: | |
3361 | /* If sh_type is yet undecided, assume it could be | |
3362 | SHT_PROGBITS/SHT_NOBITS. */ | |
3363 | case SHT_NULL: | |
3364 | return FALSE; | |
3365 | ||
3366 | /* There shouldn't be section relative relocations | |
3367 | against any other section. */ | |
3368 | default: | |
3369 | return TRUE; | |
3370 | } | |
3371 | } | |
3372 | ||
3373 | /* Create a .got section, as well as its additional info field. This | |
3374 | is almost entirely copied from | |
3375 | elflink.c:_bfd_elf_create_got_section(). */ | |
3376 | ||
3377 | static bfd_boolean | |
3378 | _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info) | |
3379 | { | |
3380 | flagword flags, pltflags; | |
3381 | asection *s; | |
3382 | struct elf_link_hash_entry *h; | |
48d502e1 BS |
3383 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
3384 | int ptralign; | |
3385 | int offset; | |
3386 | ||
3387 | /* This function may be called more than once. */ | |
3388 | s = bfd_get_section_by_name (abfd, ".got"); | |
3389 | if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) | |
3390 | return TRUE; | |
3391 | ||
3392 | /* Machine specific: although pointers are 32-bits wide, we want the | |
3393 | GOT to be aligned to a 64-bit boundary, such that function | |
3394 | descriptors in it can be accessed with 64-bit loads and | |
3395 | stores. */ | |
3396 | ptralign = 3; | |
3397 | ||
3398 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
3399 | | SEC_LINKER_CREATED); | |
3400 | pltflags = flags; | |
3401 | ||
3402 | s = bfd_make_section_with_flags (abfd, ".got", flags); | |
3403 | if (s == NULL | |
3404 | || !bfd_set_section_alignment (abfd, s, ptralign)) | |
3405 | return FALSE; | |
3406 | ||
3407 | if (bed->want_got_plt) | |
3408 | { | |
3409 | s = bfd_make_section_with_flags (abfd, ".got.plt", flags); | |
3410 | if (s == NULL | |
3411 | || !bfd_set_section_alignment (abfd, s, ptralign)) | |
3412 | return FALSE; | |
3413 | } | |
3414 | ||
3415 | if (bed->want_got_sym) | |
3416 | { | |
3417 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
3418 | (or .got.plt) section. We don't do this in the linker script | |
3419 | because we don't want to define the symbol if we are not creating | |
3420 | a global offset table. */ | |
5592d7ec | 3421 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_"); |
48d502e1 BS |
3422 | elf_hash_table (info)->hgot = h; |
3423 | if (h == NULL) | |
3424 | return FALSE; | |
3425 | ||
3426 | /* Machine-specific: we want the symbol for executables as | |
3427 | well. */ | |
3428 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3429 | return FALSE; | |
3430 | } | |
3431 | ||
3432 | /* The first bit of the global offset table is the header. */ | |
3433 | s->size += bed->got_header_size; | |
3434 | ||
3435 | /* This is the machine-specific part. Create and initialize section | |
3436 | data for the got. */ | |
3437 | if (IS_FDPIC (abfd)) | |
3438 | { | |
3439 | bfinfdpic_got_section (info) = s; | |
3440 | bfinfdpic_relocs_info (info) = htab_try_create (1, | |
3441 | bfinfdpic_relocs_info_hash, | |
3442 | bfinfdpic_relocs_info_eq, | |
3443 | (htab_del) NULL); | |
3444 | if (! bfinfdpic_relocs_info (info)) | |
3445 | return FALSE; | |
3446 | ||
3447 | s = bfd_make_section_with_flags (abfd, ".rel.got", | |
3448 | (flags | SEC_READONLY)); | |
3449 | if (s == NULL | |
3450 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
3451 | return FALSE; | |
3452 | ||
3453 | bfinfdpic_gotrel_section (info) = s; | |
3454 | ||
3455 | /* Machine-specific. */ | |
3456 | s = bfd_make_section_with_flags (abfd, ".rofixup", | |
3457 | (flags | SEC_READONLY)); | |
3458 | if (s == NULL | |
3459 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
3460 | return FALSE; | |
3461 | ||
3462 | bfinfdpic_gotfixup_section (info) = s; | |
3463 | offset = -2048; | |
3464 | flags = BSF_GLOBAL; | |
3465 | } | |
3466 | else | |
3467 | { | |
3468 | offset = 2048; | |
3469 | flags = BSF_GLOBAL | BSF_WEAK; | |
3470 | } | |
3471 | ||
48d502e1 BS |
3472 | return TRUE; |
3473 | } | |
3474 | ||
3475 | /* Make sure the got and plt sections exist, and that our pointers in | |
3476 | the link hash table point to them. */ | |
3477 | ||
3478 | static bfd_boolean | |
3479 | elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) | |
3480 | { | |
3481 | /* This is mostly copied from | |
3482 | elflink.c:_bfd_elf_create_dynamic_sections(). */ | |
3483 | flagword flags, pltflags; | |
3484 | asection *s; | |
3485 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3486 | ||
3487 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and | |
3488 | .rel[a].bss sections. */ | |
3489 | ||
3490 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
3491 | | SEC_LINKER_CREATED); | |
3492 | ||
3493 | pltflags = flags; | |
3494 | pltflags |= SEC_CODE; | |
3495 | if (bed->plt_not_loaded) | |
3496 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); | |
3497 | if (bed->plt_readonly) | |
3498 | pltflags |= SEC_READONLY; | |
3499 | ||
117ed4f8 | 3500 | s = bfd_make_section_with_flags (abfd, ".plt", pltflags); |
48d502e1 | 3501 | if (s == NULL |
48d502e1 BS |
3502 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
3503 | return FALSE; | |
3504 | /* Blackfin-specific: remember it. */ | |
3505 | bfinfdpic_plt_section (info) = s; | |
3506 | ||
3507 | if (bed->want_plt_sym) | |
3508 | { | |
3509 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the | |
3510 | .plt section. */ | |
3511 | struct elf_link_hash_entry *h; | |
3512 | struct bfd_link_hash_entry *bh = NULL; | |
3513 | ||
3514 | if (! (_bfd_generic_link_add_one_symbol | |
5592d7ec | 3515 | (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL, |
48d502e1 BS |
3516 | FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
3517 | return FALSE; | |
3518 | h = (struct elf_link_hash_entry *) bh; | |
3519 | h->def_regular = 1; | |
3520 | h->type = STT_OBJECT; | |
3521 | ||
3522 | if (! info->executable | |
3523 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3524 | return FALSE; | |
3525 | } | |
3526 | ||
3527 | /* Blackfin-specific: we want rel relocations for the plt. */ | |
117ed4f8 | 3528 | s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY); |
48d502e1 | 3529 | if (s == NULL |
48d502e1 BS |
3530 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
3531 | return FALSE; | |
3532 | /* Blackfin-specific: remember it. */ | |
3533 | bfinfdpic_pltrel_section (info) = s; | |
3534 | ||
3535 | /* Blackfin-specific: we want to create the GOT in the Blackfin way. */ | |
3536 | if (! _bfin_create_got_section (abfd, info)) | |
3537 | return FALSE; | |
3538 | ||
3539 | /* Blackfin-specific: make sure we created everything we wanted. */ | |
3540 | BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info) | |
3541 | /* && bfinfdpic_gotfixup_section (info) */ | |
3542 | && bfinfdpic_plt_section (info) | |
3543 | && bfinfdpic_pltrel_section (info)); | |
3544 | ||
3545 | if (bed->want_dynbss) | |
3546 | { | |
3547 | /* The .dynbss section is a place to put symbols which are defined | |
3548 | by dynamic objects, are referenced by regular objects, and are | |
3549 | not functions. We must allocate space for them in the process | |
3550 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
3551 | initialize them at run time. The linker script puts the .dynbss | |
3552 | section into the .bss section of the final image. */ | |
117ed4f8 AM |
3553 | s = bfd_make_section_with_flags (abfd, ".dynbss", |
3554 | SEC_ALLOC | SEC_LINKER_CREATED); | |
3555 | if (s == NULL) | |
48d502e1 BS |
3556 | return FALSE; |
3557 | ||
3558 | /* The .rel[a].bss section holds copy relocs. This section is not | |
3559 | normally needed. We need to create it here, though, so that the | |
3560 | linker will map it to an output section. We can't just create it | |
3561 | only if we need it, because we will not know whether we need it | |
3562 | until we have seen all the input files, and the first time the | |
3563 | main linker code calls BFD after examining all the input files | |
3564 | (size_dynamic_sections) the input sections have already been | |
3565 | mapped to the output sections. If the section turns out not to | |
3566 | be needed, we can discard it later. We will never need this | |
3567 | section when generating a shared object, since they do not use | |
3568 | copy relocs. */ | |
3569 | if (! info->shared) | |
3570 | { | |
117ed4f8 AM |
3571 | s = bfd_make_section_with_flags (abfd, |
3572 | (bed->default_use_rela_p | |
3573 | ? ".rela.bss" : ".rel.bss"), | |
3574 | flags | SEC_READONLY); | |
48d502e1 | 3575 | if (s == NULL |
48d502e1 BS |
3576 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
3577 | return FALSE; | |
3578 | } | |
3579 | } | |
3580 | ||
3581 | return TRUE; | |
3582 | } | |
3583 | ||
48d502e1 BS |
3584 | /* Compute the total GOT size required by each symbol in each range. |
3585 | Symbols may require up to 4 words in the GOT: an entry pointing to | |
3586 | the symbol, an entry pointing to its function descriptor, and a | |
3587 | private function descriptors taking two words. */ | |
3588 | ||
3589 | static int | |
3590 | _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_) | |
3591 | { | |
3592 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3593 | struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_; | |
3594 | unsigned relocs = 0, fixups = 0; | |
3595 | ||
3596 | /* Allocate space for a GOT entry pointing to the symbol. */ | |
3597 | if (entry->got17m4) | |
3598 | dinfo->got17m4 += 4; | |
3599 | else if (entry->gothilo) | |
3600 | dinfo->gothilo += 4; | |
3601 | else | |
3602 | entry->relocs32--; | |
3603 | entry->relocs32++; | |
3604 | ||
3605 | /* Allocate space for a GOT entry pointing to the function | |
3606 | descriptor. */ | |
3607 | if (entry->fdgot17m4) | |
3608 | dinfo->got17m4 += 4; | |
3609 | else if (entry->fdgothilo) | |
3610 | dinfo->gothilo += 4; | |
3611 | else | |
3612 | entry->relocsfd--; | |
3613 | entry->relocsfd++; | |
3614 | ||
3615 | /* Decide whether we need a PLT entry, a function descriptor in the | |
3616 | GOT, and a lazy PLT entry for this symbol. */ | |
3617 | entry->plt = entry->call | |
3618 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) | |
3619 | && elf_hash_table (dinfo->info)->dynamic_sections_created; | |
3620 | entry->privfd = entry->plt | |
3621 | || entry->fdgoff17m4 || entry->fdgoffhilo | |
3622 | || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo) | |
3623 | && (entry->symndx != -1 | |
3624 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))); | |
3625 | entry->lazyplt = entry->privfd | |
3626 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) | |
3627 | && ! (dinfo->info->flags & DF_BIND_NOW) | |
3628 | && elf_hash_table (dinfo->info)->dynamic_sections_created; | |
3629 | ||
3630 | /* Allocate space for a function descriptor. */ | |
3631 | if (entry->fdgoff17m4) | |
3632 | dinfo->fd17m4 += 8; | |
3633 | else if (entry->privfd && entry->plt) | |
3634 | dinfo->fdplt += 8; | |
3635 | else if (entry->privfd) | |
3636 | dinfo->fdhilo += 8; | |
3637 | else | |
3638 | entry->relocsfdv--; | |
3639 | entry->relocsfdv++; | |
3640 | ||
3641 | if (entry->lazyplt) | |
3642 | dinfo->lzplt += LZPLT_NORMAL_SIZE; | |
3643 | ||
3644 | if (!dinfo->info->executable || dinfo->info->pie) | |
3645 | relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv; | |
3646 | else | |
3647 | { | |
3648 | if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)) | |
3649 | { | |
3650 | if (entry->symndx != -1 | |
3651 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
3652 | fixups += entry->relocs32 + 2 * entry->relocsfdv; | |
3653 | } | |
3654 | else | |
3655 | relocs += entry->relocs32 + entry->relocsfdv; | |
3656 | ||
3657 | if (entry->symndx != -1 | |
3658 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)) | |
3659 | { | |
3660 | if (entry->symndx != -1 | |
3661 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
3662 | fixups += entry->relocsfd; | |
3663 | } | |
3664 | else | |
3665 | relocs += entry->relocsfd; | |
3666 | } | |
3667 | ||
3668 | entry->dynrelocs += relocs; | |
3669 | entry->fixups += fixups; | |
3670 | dinfo->relocs += relocs; | |
3671 | dinfo->fixups += fixups; | |
3672 | ||
3673 | return 1; | |
3674 | } | |
3675 | ||
3676 | /* This structure is used to assign offsets to got entries, function | |
3677 | descriptors, plt entries and lazy plt entries. */ | |
3678 | ||
3679 | struct _bfinfdpic_dynamic_got_plt_info | |
3680 | { | |
3681 | /* Summary information collected with _bfinfdpic_count_got_plt_entries. */ | |
3682 | struct _bfinfdpic_dynamic_got_info g; | |
3683 | ||
3684 | /* For each addressable range, we record a MAX (positive) and MIN | |
3685 | (negative) value. CUR is used to assign got entries, and it's | |
3686 | incremented from an initial positive value to MAX, then from MIN | |
3687 | to FDCUR (unless FDCUR wraps around first). FDCUR is used to | |
3688 | assign function descriptors, and it's decreased from an initial | |
3689 | non-positive value to MIN, then from MAX down to CUR (unless CUR | |
3690 | wraps around first). All of MIN, MAX, CUR and FDCUR always point | |
3691 | to even words. ODD, if non-zero, indicates an odd word to be | |
3692 | used for the next got entry, otherwise CUR is used and | |
3693 | incremented by a pair of words, wrapping around when it reaches | |
3694 | MAX. FDCUR is decremented (and wrapped) before the next function | |
3695 | descriptor is chosen. FDPLT indicates the number of remaining | |
3696 | slots that can be used for function descriptors used only by PLT | |
3697 | entries. */ | |
3698 | struct _bfinfdpic_dynamic_got_alloc_data | |
3699 | { | |
3700 | bfd_signed_vma max, cur, odd, fdcur, min; | |
3701 | bfd_vma fdplt; | |
3702 | } got17m4, gothilo; | |
3703 | }; | |
3704 | ||
3705 | /* Determine the positive and negative ranges to be used by each | |
3706 | offset range in the GOT. FDCUR and CUR, that must be aligned to a | |
3707 | double-word boundary, are the minimum (negative) and maximum | |
3708 | (positive) GOT offsets already used by previous ranges, except for | |
3709 | an ODD entry that may have been left behind. GOT and FD indicate | |
3710 | the size of GOT entries and function descriptors that must be | |
3711 | placed within the range from -WRAP to WRAP. If there's room left, | |
3712 | up to FDPLT bytes should be reserved for additional function | |
3713 | descriptors. */ | |
3714 | ||
3715 | inline static bfd_signed_vma | |
3716 | _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad, | |
3717 | bfd_signed_vma fdcur, | |
3718 | bfd_signed_vma odd, | |
3719 | bfd_signed_vma cur, | |
3720 | bfd_vma got, | |
3721 | bfd_vma fd, | |
3722 | bfd_vma fdplt, | |
3723 | bfd_vma wrap) | |
3724 | { | |
3725 | bfd_signed_vma wrapmin = -wrap; | |
3726 | ||
3727 | /* Start at the given initial points. */ | |
3728 | gad->fdcur = fdcur; | |
3729 | gad->cur = cur; | |
3730 | ||
3731 | /* If we had an incoming odd word and we have any got entries that | |
3732 | are going to use it, consume it, otherwise leave gad->odd at | |
3733 | zero. We might force gad->odd to zero and return the incoming | |
3734 | odd such that it is used by the next range, but then GOT entries | |
3735 | might appear to be out of order and we wouldn't be able to | |
3736 | shorten the GOT by one word if it turns out to end with an | |
3737 | unpaired GOT entry. */ | |
3738 | if (odd && got) | |
3739 | { | |
3740 | gad->odd = odd; | |
3741 | got -= 4; | |
3742 | odd = 0; | |
3743 | } | |
3744 | else | |
3745 | gad->odd = 0; | |
3746 | ||
3747 | /* If we're left with an unpaired GOT entry, compute its location | |
3748 | such that we can return it. Otherwise, if got doesn't require an | |
3749 | odd number of words here, either odd was already zero in the | |
3750 | block above, or it was set to zero because got was non-zero, or | |
3751 | got was already zero. In the latter case, we want the value of | |
3752 | odd to carry over to the return statement, so we don't want to | |
3753 | reset odd unless the condition below is true. */ | |
3754 | if (got & 4) | |
3755 | { | |
3756 | odd = cur + got; | |
3757 | got += 4; | |
3758 | } | |
3759 | ||
3760 | /* Compute the tentative boundaries of this range. */ | |
3761 | gad->max = cur + got; | |
3762 | gad->min = fdcur - fd; | |
3763 | gad->fdplt = 0; | |
3764 | ||
3765 | /* If function descriptors took too much space, wrap some of them | |
3766 | around. */ | |
3767 | if (gad->min < wrapmin) | |
3768 | { | |
3769 | gad->max += wrapmin - gad->min; | |
3770 | gad->min = wrapmin; | |
3771 | } | |
3772 | /* If there is space left and we have function descriptors | |
3773 | referenced in PLT entries that could take advantage of shorter | |
3774 | offsets, place them here. */ | |
3775 | else if (fdplt && gad->min > wrapmin) | |
3776 | { | |
3777 | bfd_vma fds; | |
3778 | if ((bfd_vma) (gad->min - wrapmin) < fdplt) | |
3779 | fds = gad->min - wrapmin; | |
3780 | else | |
3781 | fds = fdplt; | |
3782 | ||
3783 | fdplt -= fds; | |
3784 | gad->min -= fds; | |
3785 | gad->fdplt += fds; | |
3786 | } | |
3787 | ||
3788 | /* If GOT entries took too much space, wrap some of them around. | |
3789 | This may well cause gad->min to become lower than wrapmin. This | |
3790 | will cause a relocation overflow later on, so we don't have to | |
3791 | report it here . */ | |
3792 | if ((bfd_vma) gad->max > wrap) | |
3793 | { | |
3794 | gad->min -= gad->max - wrap; | |
3795 | gad->max = wrap; | |
3796 | } | |
3797 | /* If there is more space left, try to place some more function | |
3798 | descriptors for PLT entries. */ | |
3799 | else if (fdplt && (bfd_vma) gad->max < wrap) | |
3800 | { | |
3801 | bfd_vma fds; | |
3802 | if ((bfd_vma) (wrap - gad->max) < fdplt) | |
3803 | fds = wrap - gad->max; | |
3804 | else | |
3805 | fds = fdplt; | |
3806 | ||
3807 | fdplt -= fds; | |
3808 | gad->max += fds; | |
3809 | gad->fdplt += fds; | |
3810 | } | |
3811 | ||
3812 | /* If odd was initially computed as an offset past the wrap point, | |
3813 | wrap it around. */ | |
3814 | if (odd > gad->max) | |
3815 | odd = gad->min + odd - gad->max; | |
3816 | ||
3817 | /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed | |
3818 | before returning, so do it here too. This guarantees that, | |
3819 | should cur and fdcur meet at the wrap point, they'll both be | |
3820 | equal to min. */ | |
3821 | if (gad->cur == gad->max) | |
3822 | gad->cur = gad->min; | |
3823 | ||
3824 | return odd; | |
3825 | } | |
3826 | ||
3827 | /* Compute the location of the next GOT entry, given the allocation | |
3828 | data for a range. */ | |
3829 | ||
3830 | inline static bfd_signed_vma | |
3831 | _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) | |
3832 | { | |
3833 | bfd_signed_vma ret; | |
3834 | ||
3835 | if (gad->odd) | |
3836 | { | |
3837 | /* If there was an odd word left behind, use it. */ | |
3838 | ret = gad->odd; | |
3839 | gad->odd = 0; | |
3840 | } | |
3841 | else | |
3842 | { | |
3843 | /* Otherwise, use the word pointed to by cur, reserve the next | |
3844 | as an odd word, and skip to the next pair of words, possibly | |
3845 | wrapping around. */ | |
3846 | ret = gad->cur; | |
3847 | gad->odd = gad->cur + 4; | |
3848 | gad->cur += 8; | |
3849 | if (gad->cur == gad->max) | |
3850 | gad->cur = gad->min; | |
3851 | } | |
3852 | ||
3853 | return ret; | |
3854 | } | |
3855 | ||
3856 | /* Compute the location of the next function descriptor entry in the | |
3857 | GOT, given the allocation data for a range. */ | |
3858 | ||
3859 | inline static bfd_signed_vma | |
3860 | _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) | |
3861 | { | |
3862 | /* If we're at the bottom, wrap around, and only then allocate the | |
3863 | next pair of words. */ | |
3864 | if (gad->fdcur == gad->min) | |
3865 | gad->fdcur = gad->max; | |
3866 | return gad->fdcur -= 8; | |
3867 | } | |
3868 | ||
3869 | /* Assign GOT offsets for every GOT entry and function descriptor. | |
3870 | Doing everything in a single pass is tricky. */ | |
3871 | ||
3872 | static int | |
3873 | _bfinfdpic_assign_got_entries (void **entryp, void *info_) | |
3874 | { | |
3875 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3876 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; | |
3877 | ||
3878 | if (entry->got17m4) | |
3879 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); | |
3880 | else if (entry->gothilo) | |
3881 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); | |
3882 | ||
3883 | if (entry->fdgot17m4) | |
3884 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); | |
3885 | else if (entry->fdgothilo) | |
3886 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); | |
3887 | ||
3888 | if (entry->fdgoff17m4) | |
3889 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); | |
3890 | else if (entry->plt && dinfo->got17m4.fdplt) | |
3891 | { | |
3892 | dinfo->got17m4.fdplt -= 8; | |
3893 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); | |
3894 | } | |
3895 | else if (entry->plt) | |
3896 | { | |
3897 | dinfo->gothilo.fdplt -= 8; | |
3898 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); | |
3899 | } | |
3900 | else if (entry->privfd) | |
3901 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); | |
3902 | ||
3903 | return 1; | |
3904 | } | |
3905 | ||
3906 | /* Assign GOT offsets to private function descriptors used by PLT | |
3907 | entries (or referenced by 32-bit offsets), as well as PLT entries | |
3908 | and lazy PLT entries. */ | |
3909 | ||
3910 | static int | |
3911 | _bfinfdpic_assign_plt_entries (void **entryp, void *info_) | |
3912 | { | |
3913 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3914 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; | |
3915 | ||
3916 | /* If this symbol requires a local function descriptor, allocate | |
3917 | one. */ | |
3918 | if (entry->privfd && entry->fd_entry == 0) | |
3919 | { | |
3920 | if (dinfo->got17m4.fdplt) | |
3921 | { | |
3922 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); | |
3923 | dinfo->got17m4.fdplt -= 8; | |
3924 | } | |
3925 | else | |
3926 | { | |
3927 | BFD_ASSERT (dinfo->gothilo.fdplt); | |
3928 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); | |
3929 | dinfo->gothilo.fdplt -= 8; | |
3930 | } | |
3931 | } | |
3932 | ||
3933 | if (entry->plt) | |
3934 | { | |
3935 | int size; | |
3936 | ||
3937 | /* We use the section's raw size to mark the location of the | |
3938 | next PLT entry. */ | |
3939 | entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size; | |
3940 | ||
3941 | /* Figure out the length of this PLT entry based on the | |
3942 | addressing mode we need to reach the function descriptor. */ | |
3943 | BFD_ASSERT (entry->fd_entry); | |
3944 | if (entry->fd_entry >= -(1 << (18 - 1)) | |
3945 | && entry->fd_entry + 4 < (1 << (18 - 1))) | |
3946 | size = 10; | |
3947 | else | |
3948 | size = 16; | |
3949 | ||
3950 | bfinfdpic_plt_section (dinfo->g.info)->size += size; | |
3951 | } | |
3952 | ||
3953 | if (entry->lazyplt) | |
3954 | { | |
3955 | entry->lzplt_entry = dinfo->g.lzplt; | |
3956 | dinfo->g.lzplt += LZPLT_NORMAL_SIZE; | |
3957 | /* If this entry is the one that gets the resolver stub, account | |
3958 | for the additional instruction. */ | |
3959 | if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE | |
3960 | == BFINFDPIC_LZPLT_RESOLV_LOC) | |
3961 | dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA; | |
3962 | } | |
3963 | ||
3964 | return 1; | |
3965 | } | |
3966 | ||
3967 | /* Follow indirect and warning hash entries so that each got entry | |
3968 | points to the final symbol definition. P must point to a pointer | |
3969 | to the hash table we're traversing. Since this traversal may | |
3970 | modify the hash table, we set this pointer to NULL to indicate | |
3971 | we've made a potentially-destructive change to the hash table, so | |
3972 | the traversal must be restarted. */ | |
3973 | static int | |
3974 | _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p) | |
3975 | { | |
3976 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3977 | htab_t *htab = p; | |
3978 | ||
3979 | if (entry->symndx == -1) | |
3980 | { | |
3981 | struct elf_link_hash_entry *h = entry->d.h; | |
3982 | struct bfinfdpic_relocs_info *oentry; | |
3983 | ||
3984 | while (h->root.type == bfd_link_hash_indirect | |
3985 | || h->root.type == bfd_link_hash_warning) | |
3986 | h = (struct elf_link_hash_entry *)h->root.u.i.link; | |
3987 | ||
3988 | if (entry->d.h == h) | |
3989 | return 1; | |
3990 | ||
3991 | oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend, | |
3992 | NO_INSERT); | |
3993 | ||
3994 | if (oentry) | |
3995 | { | |
3996 | /* Merge the two entries. */ | |
3997 | bfinfdpic_pic_merge_early_relocs_info (oentry, entry); | |
3998 | htab_clear_slot (*htab, entryp); | |
3999 | return 1; | |
4000 | } | |
4001 | ||
4002 | entry->d.h = h; | |
4003 | ||
4004 | /* If we can't find this entry with the new bfd hash, re-insert | |
4005 | it, and get the traversal restarted. */ | |
4006 | if (! htab_find (*htab, entry)) | |
4007 | { | |
4008 | htab_clear_slot (*htab, entryp); | |
4009 | entryp = htab_find_slot (*htab, entry, INSERT); | |
4010 | if (! *entryp) | |
4011 | *entryp = entry; | |
4012 | /* Abort the traversal, since the whole table may have | |
4013 | moved, and leave it up to the parent to restart the | |
4014 | process. */ | |
4015 | *(htab_t *)p = NULL; | |
4016 | return 0; | |
4017 | } | |
4018 | } | |
4019 | ||
4020 | return 1; | |
4021 | } | |
4022 | ||
4023 | /* Set the sizes of the dynamic sections. */ | |
4024 | ||
4025 | static bfd_boolean | |
4026 | elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd, | |
4027 | struct bfd_link_info *info) | |
4028 | { | |
4029 | bfd *dynobj; | |
4030 | asection *s; | |
4031 | struct _bfinfdpic_dynamic_got_plt_info gpinfo; | |
4032 | bfd_signed_vma odd; | |
4033 | bfd_vma limit; | |
4034 | ||
4035 | dynobj = elf_hash_table (info)->dynobj; | |
4036 | BFD_ASSERT (dynobj != NULL); | |
4037 | ||
4038 | if (elf_hash_table (info)->dynamic_sections_created) | |
4039 | { | |
4040 | /* Set the contents of the .interp section to the interpreter. */ | |
4041 | if (info->executable) | |
4042 | { | |
4043 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
4044 | BFD_ASSERT (s != NULL); | |
4045 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
4046 | s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; | |
4047 | } | |
4048 | } | |
4049 | ||
4050 | memset (&gpinfo, 0, sizeof (gpinfo)); | |
4051 | gpinfo.g.info = info; | |
4052 | ||
4053 | for (;;) | |
4054 | { | |
4055 | htab_t relocs = bfinfdpic_relocs_info (info); | |
4056 | ||
4057 | htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs); | |
4058 | ||
4059 | if (relocs == bfinfdpic_relocs_info (info)) | |
4060 | break; | |
4061 | } | |
4062 | ||
4063 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries, | |
4064 | &gpinfo.g); | |
4065 | ||
4066 | odd = 12; | |
4067 | /* Compute the total size taken by entries in the 18-bit range, | |
4068 | to tell how many PLT function descriptors we can bring into it | |
4069 | without causing it to overflow. */ | |
4070 | limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4; | |
4071 | if (limit < (bfd_vma)1 << 18) | |
4072 | limit = ((bfd_vma)1 << 18) - limit; | |
4073 | else | |
4074 | limit = 0; | |
4075 | if (gpinfo.g.fdplt < limit) | |
4076 | limit = gpinfo.g.fdplt; | |
4077 | ||
4078 | /* Determine the ranges of GOT offsets that we can use for each | |
4079 | range of addressing modes. */ | |
4080 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4, | |
4081 | 0, | |
4082 | odd, | |
4083 | 16, | |
4084 | gpinfo.g.got17m4, | |
4085 | gpinfo.g.fd17m4, | |
4086 | limit, | |
4087 | (bfd_vma)1 << (18-1)); | |
4088 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo, | |
4089 | gpinfo.got17m4.min, | |
4090 | odd, | |
4091 | gpinfo.got17m4.max, | |
4092 | gpinfo.g.gothilo, | |
4093 | gpinfo.g.fdhilo, | |
4094 | gpinfo.g.fdplt - gpinfo.got17m4.fdplt, | |
4095 | (bfd_vma)1 << (32-1)); | |
4096 | ||
4097 | /* Now assign (most) GOT offsets. */ | |
4098 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries, | |
4099 | &gpinfo); | |
4100 | ||
4101 | bfinfdpic_got_section (info)->size = gpinfo.gothilo.max | |
4102 | - gpinfo.gothilo.min | |
4103 | /* If an odd word is the last word of the GOT, we don't need this | |
4104 | word to be part of the GOT. */ | |
4105 | - (odd + 4 == gpinfo.gothilo.max ? 4 : 0); | |
4106 | if (bfinfdpic_got_section (info)->size == 0) | |
4107 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; | |
4108 | else if (bfinfdpic_got_section (info)->size == 12 | |
4109 | && ! elf_hash_table (info)->dynamic_sections_created) | |
4110 | { | |
4111 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; | |
4112 | bfinfdpic_got_section (info)->size = 0; | |
4113 | } | |
4114 | else | |
4115 | { | |
4116 | bfinfdpic_got_section (info)->contents = | |
4117 | (bfd_byte *) bfd_zalloc (dynobj, | |
4118 | bfinfdpic_got_section (info)->size); | |
4119 | if (bfinfdpic_got_section (info)->contents == NULL) | |
4120 | return FALSE; | |
4121 | } | |
4122 | ||
4123 | if (elf_hash_table (info)->dynamic_sections_created) | |
4124 | /* Subtract the number of lzplt entries, since those will generate | |
4125 | relocations in the pltrel section. */ | |
4126 | bfinfdpic_gotrel_section (info)->size = | |
4127 | (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE) | |
4128 | * get_elf_backend_data (output_bfd)->s->sizeof_rel; | |
4129 | else | |
4130 | BFD_ASSERT (gpinfo.g.relocs == 0); | |
4131 | if (bfinfdpic_gotrel_section (info)->size == 0) | |
4132 | bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE; | |
4133 | else | |
4134 | { | |
4135 | bfinfdpic_gotrel_section (info)->contents = | |
4136 | (bfd_byte *) bfd_zalloc (dynobj, | |
4137 | bfinfdpic_gotrel_section (info)->size); | |
4138 | if (bfinfdpic_gotrel_section (info)->contents == NULL) | |
4139 | return FALSE; | |
4140 | } | |
4141 | ||
4142 | bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4; | |
4143 | if (bfinfdpic_gotfixup_section (info)->size == 0) | |
4144 | bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE; | |
4145 | else | |
4146 | { | |
4147 | bfinfdpic_gotfixup_section (info)->contents = | |
4148 | (bfd_byte *) bfd_zalloc (dynobj, | |
4149 | bfinfdpic_gotfixup_section (info)->size); | |
4150 | if (bfinfdpic_gotfixup_section (info)->contents == NULL) | |
4151 | return FALSE; | |
4152 | } | |
4153 | ||
4154 | if (elf_hash_table (info)->dynamic_sections_created) | |
4155 | { | |
4156 | bfinfdpic_pltrel_section (info)->size = | |
4157 | gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel; | |
4158 | if (bfinfdpic_pltrel_section (info)->size == 0) | |
4159 | bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE; | |
4160 | else | |
4161 | { | |
4162 | bfinfdpic_pltrel_section (info)->contents = | |
4163 | (bfd_byte *) bfd_zalloc (dynobj, | |
4164 | bfinfdpic_pltrel_section (info)->size); | |
4165 | if (bfinfdpic_pltrel_section (info)->contents == NULL) | |
4166 | return FALSE; | |
4167 | } | |
4168 | } | |
4169 | ||
4170 | /* Add 4 bytes for every block of at most 65535 lazy PLT entries, | |
4171 | such that there's room for the additional instruction needed to | |
4172 | call the resolver. Since _bfinfdpic_assign_got_entries didn't | |
4173 | account for them, our block size is 4 bytes smaller than the real | |
4174 | block size. */ | |
4175 | if (elf_hash_table (info)->dynamic_sections_created) | |
4176 | { | |
4177 | bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt | |
4178 | + ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE) | |
4179 | / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA); | |
4180 | } | |
4181 | ||
4182 | /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to | |
4183 | actually assign lazy PLT entries addresses. */ | |
4184 | gpinfo.g.lzplt = 0; | |
4185 | ||
4186 | /* Save information that we're going to need to generate GOT and PLT | |
4187 | entries. */ | |
4188 | bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min; | |
4189 | ||
4190 | if (get_elf_backend_data (output_bfd)->want_got_sym) | |
4191 | elf_hash_table (info)->hgot->root.u.def.value | |
4192 | += bfinfdpic_got_initial_offset (info); | |
4193 | ||
4194 | if (elf_hash_table (info)->dynamic_sections_created) | |
4195 | bfinfdpic_plt_initial_offset (info) = | |
4196 | bfinfdpic_plt_section (info)->size; | |
4197 | ||
4198 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries, | |
4199 | &gpinfo); | |
4200 | ||
4201 | /* Allocate the PLT section contents only after | |
4202 | _bfinfdpic_assign_plt_entries has a chance to add the size of the | |
4203 | non-lazy PLT entries. */ | |
4204 | if (elf_hash_table (info)->dynamic_sections_created) | |
4205 | { | |
4206 | if (bfinfdpic_plt_section (info)->size == 0) | |
4207 | bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE; | |
4208 | else | |
4209 | { | |
4210 | bfinfdpic_plt_section (info)->contents = | |
4211 | (bfd_byte *) bfd_zalloc (dynobj, | |
4212 | bfinfdpic_plt_section (info)->size); | |
4213 | if (bfinfdpic_plt_section (info)->contents == NULL) | |
4214 | return FALSE; | |
4215 | } | |
4216 | } | |
4217 | ||
4218 | if (elf_hash_table (info)->dynamic_sections_created) | |
4219 | { | |
4220 | if (bfinfdpic_got_section (info)->size) | |
4221 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)) | |
4222 | return FALSE; | |
4223 | ||
4224 | if (bfinfdpic_pltrel_section (info)->size) | |
4225 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
4226 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL) | |
4227 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) | |
4228 | return FALSE; | |
4229 | ||
4230 | if (bfinfdpic_gotrel_section (info)->size) | |
4231 | if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0) | |
4232 | || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0) | |
4233 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, | |
4234 | sizeof (Elf32_External_Rel))) | |
4235 | return FALSE; | |
4236 | } | |
4237 | ||
4238 | return TRUE; | |
4239 | } | |
4240 | ||
4241 | static bfd_boolean | |
4242 | elf32_bfinfdpic_always_size_sections (bfd *output_bfd, | |
4243 | struct bfd_link_info *info) | |
4244 | { | |
4245 | if (!info->relocatable) | |
4246 | { | |
4247 | struct elf_link_hash_entry *h; | |
48d502e1 BS |
4248 | |
4249 | /* Force a PT_GNU_STACK segment to be created. */ | |
4250 | if (! elf_tdata (output_bfd)->stack_flags) | |
4251 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; | |
4252 | ||
4253 | /* Define __stacksize if it's not defined yet. */ | |
4254 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", | |
4255 | FALSE, FALSE, FALSE); | |
4256 | if (! h || h->root.type != bfd_link_hash_defined | |
4257 | || h->type != STT_OBJECT | |
4258 | || !h->def_regular) | |
4259 | { | |
4260 | struct bfd_link_hash_entry *bh = NULL; | |
4261 | ||
4262 | if (!(_bfd_generic_link_add_one_symbol | |
4263 | (info, output_bfd, "__stacksize", | |
4264 | BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE, | |
4265 | (const char *) NULL, FALSE, | |
4266 | get_elf_backend_data (output_bfd)->collect, &bh))) | |
4267 | return FALSE; | |
4268 | ||
4269 | h = (struct elf_link_hash_entry *) bh; | |
4270 | h->def_regular = 1; | |
4271 | h->type = STT_OBJECT; | |
4272 | } | |
48d502e1 BS |
4273 | } |
4274 | ||
4275 | return TRUE; | |
4276 | } | |
4277 | ||
4278 | static bfd_boolean | |
e36284ab AM |
4279 | elf32_bfinfdpic_modify_program_headers (bfd *output_bfd, |
4280 | struct bfd_link_info *info) | |
48d502e1 | 4281 | { |
e36284ab | 4282 | struct elf_obj_tdata *tdata = elf_tdata (output_bfd); |
48d502e1 | 4283 | struct elf_segment_map *m; |
e36284ab | 4284 | Elf_Internal_Phdr *p; |
48d502e1 BS |
4285 | |
4286 | /* objcopy and strip preserve what's already there using | |
4287 | elf32_bfinfdpic_copy_private_bfd_data (). */ | |
4288 | if (! info) | |
4289 | return TRUE; | |
4290 | ||
e36284ab | 4291 | for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++) |
48d502e1 BS |
4292 | if (m->p_type == PT_GNU_STACK) |
4293 | break; | |
4294 | ||
4295 | if (m) | |
4296 | { | |
48d502e1 BS |
4297 | struct elf_link_hash_entry *h; |
4298 | ||
e36284ab AM |
4299 | /* Obtain the pointer to the __stacksize symbol. */ |
4300 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", | |
4301 | FALSE, FALSE, FALSE); | |
4302 | if (h) | |
48d502e1 | 4303 | { |
48d502e1 BS |
4304 | while (h->root.type == bfd_link_hash_indirect |
4305 | || h->root.type == bfd_link_hash_warning) | |
e36284ab | 4306 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
48d502e1 | 4307 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
e36284ab | 4308 | } |
48d502e1 | 4309 | |
e36284ab AM |
4310 | /* Set the header p_memsz from the symbol value. We |
4311 | intentionally ignore the symbol section. */ | |
4312 | if (h && h->root.type == bfd_link_hash_defined) | |
4313 | p->p_memsz = h->root.u.def.value; | |
4314 | else | |
4315 | p->p_memsz = DEFAULT_STACK_SIZE; | |
48d502e1 | 4316 | |
e36284ab | 4317 | p->p_align = 8; |
48d502e1 BS |
4318 | } |
4319 | ||
4320 | return TRUE; | |
4321 | } | |
4322 | ||
4323 | static bfd_boolean | |
4324 | elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd, | |
4325 | struct bfd_link_info *info) | |
4326 | { | |
4327 | bfd *dynobj; | |
4328 | asection *sdyn; | |
4329 | ||
4330 | dynobj = elf_hash_table (info)->dynobj; | |
4331 | ||
4332 | if (bfinfdpic_got_section (info)) | |
4333 | { | |
4334 | BFD_ASSERT (bfinfdpic_gotrel_section (info)->size | |
4335 | == (bfinfdpic_gotrel_section (info)->reloc_count | |
4336 | * sizeof (Elf32_External_Rel))); | |
4337 | ||
4338 | if (bfinfdpic_gotfixup_section (info)) | |
4339 | { | |
4340 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; | |
4341 | bfd_vma got_value = hgot->root.u.def.value | |
4342 | + hgot->root.u.def.section->output_section->vma | |
4343 | + hgot->root.u.def.section->output_offset; | |
4344 | ||
4345 | _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info), | |
4346 | got_value, 0); | |
4347 | ||
4348 | if (bfinfdpic_gotfixup_section (info)->size | |
4349 | != (bfinfdpic_gotfixup_section (info)->reloc_count * 4)) | |
0f64bb02 CM |
4350 | { |
4351 | (*_bfd_error_handler) | |
48d502e1 | 4352 | ("LINKER BUG: .rofixup section size mismatch"); |
0f64bb02 CM |
4353 | return FALSE; |
4354 | } | |
4355 | } | |
4356 | } | |
48d502e1 BS |
4357 | if (elf_hash_table (info)->dynamic_sections_created) |
4358 | { | |
4359 | BFD_ASSERT (bfinfdpic_pltrel_section (info)->size | |
4360 | == (bfinfdpic_pltrel_section (info)->reloc_count | |
4361 | * sizeof (Elf32_External_Rel))); | |
4362 | } | |
4363 | ||
4364 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4365 | ||
4366 | if (elf_hash_table (info)->dynamic_sections_created) | |
4367 | { | |
4368 | Elf32_External_Dyn * dyncon; | |
4369 | Elf32_External_Dyn * dynconend; | |
4370 | ||
4371 | BFD_ASSERT (sdyn != NULL); | |
4372 | ||
4373 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
4374 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
4375 | ||
4376 | for (; dyncon < dynconend; dyncon++) | |
4377 | { | |
4378 | Elf_Internal_Dyn dyn; | |
4379 | ||
4380 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4381 | ||
4382 | switch (dyn.d_tag) | |
4383 | { | |
4384 | default: | |
4385 | break; | |
4386 | ||
4387 | case DT_PLTGOT: | |
4388 | dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma | |
4389 | + bfinfdpic_got_section (info)->output_offset | |
4390 | + bfinfdpic_got_initial_offset (info); | |
4391 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4392 | break; | |
4393 | ||
4394 | case DT_JMPREL: | |
4395 | dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info) | |
4396 | ->output_section->vma | |
4397 | + bfinfdpic_pltrel_section (info)->output_offset; | |
4398 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4399 | break; | |
4400 | ||
4401 | case DT_PLTRELSZ: | |
4402 | dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size; | |
4403 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4404 | break; | |
4405 | } | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | return TRUE; | |
4410 | } | |
4411 | ||
4412 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
4413 | regular object. */ | |
4414 | ||
4415 | static bfd_boolean | |
4416 | elf32_bfinfdpic_adjust_dynamic_symbol | |
51408ec2 AM |
4417 | (struct bfd_link_info *info, |
4418 | struct elf_link_hash_entry *h) | |
48d502e1 BS |
4419 | { |
4420 | bfd * dynobj; | |
4421 | ||
4422 | dynobj = elf_hash_table (info)->dynobj; | |
4423 | ||
4424 | /* Make sure we know what is going on here. */ | |
4425 | BFD_ASSERT (dynobj != NULL | |
4426 | && (h->u.weakdef != NULL | |
4427 | || (h->def_dynamic | |
4428 | && h->ref_regular | |
4429 | && !h->def_regular))); | |
4430 | ||
4431 | /* If this is a weak symbol, and there is a real definition, the | |
4432 | processor independent code will have arranged for us to see the | |
4433 | real definition first, and we can just use the same value. */ | |
4434 | if (h->u.weakdef != NULL) | |
4435 | { | |
4436 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
4437 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
4438 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
4439 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
4440 | } | |
0f64bb02 CM |
4441 | |
4442 | return TRUE; | |
4443 | } | |
4444 | ||
48d502e1 BS |
4445 | /* Perform any actions needed for dynamic symbols. */ |
4446 | ||
4447 | static bfd_boolean | |
4448 | elf32_bfinfdpic_finish_dynamic_symbol | |
4449 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4450 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4451 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
4452 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) | |
0f64bb02 | 4453 | { |
48d502e1 BS |
4454 | return TRUE; |
4455 | } | |
0f64bb02 | 4456 | |
48d502e1 BS |
4457 | /* Decide whether to attempt to turn absptr or lsda encodings in |
4458 | shared libraries into pcrel within the given input section. */ | |
0f64bb02 | 4459 | |
48d502e1 BS |
4460 | static bfd_boolean |
4461 | bfinfdpic_elf_use_relative_eh_frame | |
4462 | (bfd *input_bfd ATTRIBUTE_UNUSED, | |
4463 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4464 | asection *eh_frame_section ATTRIBUTE_UNUSED) | |
4465 | { | |
4466 | /* We can't use PC-relative encodings in FDPIC binaries, in general. */ | |
4467 | return FALSE; | |
4468 | } | |
0f64bb02 | 4469 | |
48d502e1 | 4470 | /* Adjust the contents of an eh_frame_hdr section before they're output. */ |
0f64bb02 | 4471 | |
48d502e1 BS |
4472 | static bfd_byte |
4473 | bfinfdpic_elf_encode_eh_address (bfd *abfd, | |
4474 | struct bfd_link_info *info, | |
4475 | asection *osec, bfd_vma offset, | |
4476 | asection *loc_sec, bfd_vma loc_offset, | |
4477 | bfd_vma *encoded) | |
4478 | { | |
4479 | struct elf_link_hash_entry *h; | |
0f64bb02 | 4480 | |
48d502e1 BS |
4481 | h = elf_hash_table (info)->hgot; |
4482 | BFD_ASSERT (h && h->root.type == bfd_link_hash_defined); | |
4483 | ||
4484 | if (! h || (_bfinfdpic_osec_to_segment (abfd, osec) | |
4485 | == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section))) | |
4486 | return _bfd_elf_encode_eh_address (abfd, info, osec, offset, | |
4487 | loc_sec, loc_offset, encoded); | |
4488 | ||
4489 | BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec) | |
4490 | == (_bfinfdpic_osec_to_segment | |
4491 | (abfd, h->root.u.def.section->output_section))); | |
4492 | ||
4493 | *encoded = osec->vma + offset | |
4494 | - (h->root.u.def.value | |
4495 | + h->root.u.def.section->output_section->vma | |
4496 | + h->root.u.def.section->output_offset); | |
4497 | ||
4498 | return DW_EH_PE_datarel | DW_EH_PE_sdata4; | |
0f64bb02 CM |
4499 | } |
4500 | ||
4501 | ||
48d502e1 BS |
4502 | |
4503 | /* Look through the relocs for a section during the first phase. | |
4504 | ||
4505 | Besides handling virtual table relocs for gc, we have to deal with | |
4506 | all sorts of PIC-related relocations. We describe below the | |
4507 | general plan on how to handle such relocations, even though we only | |
4508 | collect information at this point, storing them in hash tables for | |
4509 | perusal of later passes. | |
4510 | ||
4511 | 32 relocations are propagated to the linker output when creating | |
4512 | position-independent output. LO16 and HI16 relocations are not | |
4513 | supposed to be encountered in this case. | |
4514 | ||
4515 | LABEL16 should always be resolvable by the linker, since it's only | |
4516 | used by branches. | |
4517 | ||
4518 | LABEL24, on the other hand, is used by calls. If it turns out that | |
4519 | the target of a call is a dynamic symbol, a PLT entry must be | |
4520 | created for it, which triggers the creation of a private function | |
4521 | descriptor and, unless lazy binding is disabled, a lazy PLT entry. | |
4522 | ||
4523 | GPREL relocations require the referenced symbol to be in the same | |
4524 | segment as _gp, but this can only be checked later. | |
4525 | ||
4526 | All GOT, GOTOFF and FUNCDESC relocations require a .got section to | |
4527 | exist. LABEL24 might as well, since it may require a PLT entry, | |
4528 | that will require a got. | |
4529 | ||
4530 | Non-FUNCDESC GOT relocations require a GOT entry to be created | |
4531 | regardless of whether the symbol is dynamic. However, since a | |
4532 | global symbol that turns out to not be exported may have the same | |
4533 | address of a non-dynamic symbol, we don't assign GOT entries at | |
4534 | this point, such that we can share them in this case. A relocation | |
4535 | for the GOT entry always has to be created, be it to offset a | |
4536 | private symbol by the section load address, be it to get the symbol | |
4537 | resolved dynamically. | |
4538 | ||
4539 | FUNCDESC GOT relocations require a GOT entry to be created, and | |
4540 | handled as if a FUNCDESC relocation was applied to the GOT entry in | |
4541 | an object file. | |
4542 | ||
4543 | FUNCDESC relocations referencing a symbol that turns out to NOT be | |
4544 | dynamic cause a private function descriptor to be created. The | |
4545 | FUNCDESC relocation then decays to a 32 relocation that points at | |
4546 | the private descriptor. If the symbol is dynamic, the FUNCDESC | |
4547 | relocation is propagated to the linker output, such that the | |
4548 | dynamic linker creates the canonical descriptor, pointing to the | |
4549 | dynamically-resolved definition of the function. | |
4550 | ||
4551 | Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic | |
4552 | symbols that are assigned to the same segment as the GOT, but we | |
4553 | can only check this later, after we know the complete set of | |
4554 | symbols defined and/or exported. | |
4555 | ||
4556 | FUNCDESC GOTOFF relocations require a function descriptor to be | |
4557 | created and, unless lazy binding is disabled or the symbol is not | |
4558 | dynamic, a lazy PLT entry. Since we can't tell at this point | |
4559 | whether a symbol is going to be dynamic, we have to decide later | |
4560 | whether to create a lazy PLT entry or bind the descriptor directly | |
4561 | to the private function. | |
4562 | ||
4563 | FUNCDESC_VALUE relocations are not supposed to be present in object | |
4564 | files, but they may very well be simply propagated to the linker | |
4565 | output, since they have no side effect. | |
4566 | ||
4567 | ||
4568 | A function descriptor always requires a FUNCDESC_VALUE relocation. | |
4569 | Whether it's in .plt.rel or not depends on whether lazy binding is | |
4570 | enabled and on whether the referenced symbol is dynamic. | |
4571 | ||
4572 | The existence of a lazy PLT requires the resolverStub lazy PLT | |
4573 | entry to be present. | |
4574 | ||
4575 | ||
4576 | As for assignment of GOT, PLT and lazy PLT entries, and private | |
4577 | descriptors, we might do them all sequentially, but we can do | |
4578 | better than that. For example, we can place GOT entries and | |
4579 | private function descriptors referenced using 12-bit operands | |
4580 | closer to the PIC register value, such that these relocations don't | |
4581 | overflow. Those that are only referenced with LO16 relocations | |
4582 | could come next, but we may as well place PLT-required function | |
4583 | descriptors in the 12-bit range to make them shorter. Symbols | |
4584 | referenced with LO16/HI16 may come next, but we may place | |
4585 | additional function descriptors in the 16-bit range if we can | |
4586 | reliably tell that we've already placed entries that are ever | |
4587 | referenced with only LO16. PLT entries are therefore generated as | |
4588 | small as possible, while not introducing relocation overflows in | |
4589 | GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be | |
4590 | generated before or after PLT entries, but not intermingled with | |
4591 | them, such that we can have more lazy PLT entries in range for a | |
4592 | branch to the resolverStub. The resolverStub should be emitted at | |
4593 | the most distant location from the first lazy PLT entry such that | |
4594 | it's still in range for a branch, or closer, if there isn't a need | |
4595 | for so many lazy PLT entries. Additional lazy PLT entries may be | |
4596 | emitted after the resolverStub, as long as branches are still in | |
4597 | range. If the branch goes out of range, longer lazy PLT entries | |
4598 | are emitted. | |
4599 | ||
4600 | We could further optimize PLT and lazy PLT entries by giving them | |
4601 | priority in assignment to closer-to-gr17 locations depending on the | |
4602 | number of occurrences of references to them (assuming a function | |
4603 | that's called more often is more important for performance, so its | |
4604 | PLT entry should be faster), or taking hints from the compiler. | |
4605 | Given infinite time and money... :-) */ | |
0f64bb02 CM |
4606 | |
4607 | static bfd_boolean | |
48d502e1 BS |
4608 | bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info, |
4609 | asection *sec, const Elf_Internal_Rela *relocs) | |
0f64bb02 CM |
4610 | { |
4611 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 4612 | struct elf_link_hash_entry **sym_hashes; |
48d502e1 BS |
4613 | const Elf_Internal_Rela *rel; |
4614 | const Elf_Internal_Rela *rel_end; | |
0f64bb02 | 4615 | bfd *dynobj; |
48d502e1 | 4616 | struct bfinfdpic_relocs_info *picrel; |
0f64bb02 | 4617 | |
48d502e1 | 4618 | if (info->relocatable) |
0f64bb02 CM |
4619 | return TRUE; |
4620 | ||
4621 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
4622 | sym_hashes = elf_sym_hashes (abfd); | |
0f64bb02 | 4623 | |
48d502e1 BS |
4624 | dynobj = elf_hash_table (info)->dynobj; |
4625 | rel_end = relocs + sec->reloc_count; | |
4626 | for (rel = relocs; rel < rel_end; rel++) | |
0f64bb02 | 4627 | { |
0f64bb02 | 4628 | struct elf_link_hash_entry *h; |
48d502e1 BS |
4629 | unsigned long r_symndx; |
4630 | ||
4631 | r_symndx = ELF32_R_SYM (rel->r_info); | |
4632 | if (r_symndx < symtab_hdr->sh_info) | |
4633 | h = NULL; | |
4634 | else | |
4635 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
0f64bb02 CM |
4636 | |
4637 | switch (ELF32_R_TYPE (rel->r_info)) | |
4638 | { | |
48d502e1 BS |
4639 | case R_BFIN_GOT17M4: |
4640 | case R_BFIN_GOTHI: | |
4641 | case R_BFIN_GOTLO: | |
4642 | case R_BFIN_FUNCDESC_GOT17M4: | |
4643 | case R_BFIN_FUNCDESC_GOTHI: | |
4644 | case R_BFIN_FUNCDESC_GOTLO: | |
4645 | case R_BFIN_GOTOFF17M4: | |
4646 | case R_BFIN_GOTOFFHI: | |
4647 | case R_BFIN_GOTOFFLO: | |
4648 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
4649 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
4650 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
4651 | case R_BFIN_FUNCDESC: | |
4652 | case R_BFIN_FUNCDESC_VALUE: | |
4653 | if (! IS_FDPIC (abfd)) | |
4654 | goto bad_reloc; | |
4655 | /* Fall through. */ | |
4656 | case R_pcrel24: | |
4657 | case R_pcrel24_jump_l: | |
4658 | case R_byte4_data: | |
4659 | if (IS_FDPIC (abfd) && ! dynobj) | |
0f64bb02 | 4660 | { |
48d502e1 BS |
4661 | elf_hash_table (info)->dynobj = dynobj = abfd; |
4662 | if (! _bfin_create_got_section (abfd, info)) | |
4663 | return FALSE; | |
0f64bb02 | 4664 | } |
48d502e1 | 4665 | if (! IS_FDPIC (abfd)) |
0f64bb02 | 4666 | { |
48d502e1 BS |
4667 | picrel = NULL; |
4668 | break; | |
4669 | } | |
4670 | if (h != NULL) | |
4671 | { | |
4672 | if (h->dynindx == -1) | |
4673 | switch (ELF_ST_VISIBILITY (h->other)) | |
4674 | { | |
4675 | case STV_INTERNAL: | |
4676 | case STV_HIDDEN: | |
4677 | break; | |
4678 | default: | |
4679 | bfd_elf_link_record_dynamic_symbol (info, h); | |
4680 | break; | |
4681 | } | |
4682 | picrel | |
4683 | = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), | |
4684 | abfd, h, | |
4685 | rel->r_addend, INSERT); | |
0f64bb02 | 4686 | } |
48d502e1 BS |
4687 | else |
4688 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info | |
4689 | (info), abfd, r_symndx, | |
4690 | rel->r_addend, INSERT); | |
4691 | if (! picrel) | |
4692 | return FALSE; | |
0f64bb02 | 4693 | break; |
48d502e1 | 4694 | |
0f64bb02 | 4695 | default: |
48d502e1 | 4696 | picrel = NULL; |
0f64bb02 CM |
4697 | break; |
4698 | } | |
48d502e1 BS |
4699 | |
4700 | switch (ELF32_R_TYPE (rel->r_info)) | |
4701 | { | |
4702 | case R_pcrel24: | |
4703 | case R_pcrel24_jump_l: | |
4704 | if (IS_FDPIC (abfd)) | |
2774f1a6 | 4705 | picrel->call++; |
48d502e1 BS |
4706 | break; |
4707 | ||
4708 | case R_BFIN_FUNCDESC_VALUE: | |
4709 | picrel->relocsfdv++; | |
4710 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) | |
4711 | picrel->relocs32--; | |
4712 | /* Fall through. */ | |
4713 | ||
4714 | case R_byte4_data: | |
4715 | if (! IS_FDPIC (abfd)) | |
4716 | break; | |
4717 | ||
2774f1a6 | 4718 | picrel->sym++; |
48d502e1 BS |
4719 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
4720 | picrel->relocs32++; | |
4721 | break; | |
4722 | ||
4723 | case R_BFIN_GOT17M4: | |
2774f1a6 | 4724 | picrel->got17m4++; |
48d502e1 BS |
4725 | break; |
4726 | ||
4727 | case R_BFIN_GOTHI: | |
4728 | case R_BFIN_GOTLO: | |
2774f1a6 | 4729 | picrel->gothilo++; |
48d502e1 BS |
4730 | break; |
4731 | ||
4732 | case R_BFIN_FUNCDESC_GOT17M4: | |
2774f1a6 | 4733 | picrel->fdgot17m4++; |
48d502e1 BS |
4734 | break; |
4735 | ||
4736 | case R_BFIN_FUNCDESC_GOTHI: | |
4737 | case R_BFIN_FUNCDESC_GOTLO: | |
2774f1a6 | 4738 | picrel->fdgothilo++; |
48d502e1 BS |
4739 | break; |
4740 | ||
4741 | case R_BFIN_GOTOFF17M4: | |
4742 | case R_BFIN_GOTOFFHI: | |
4743 | case R_BFIN_GOTOFFLO: | |
2774f1a6 | 4744 | picrel->gotoff++; |
48d502e1 BS |
4745 | break; |
4746 | ||
4747 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
2774f1a6 | 4748 | picrel->fdgoff17m4++; |
48d502e1 BS |
4749 | break; |
4750 | ||
4751 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
4752 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
2774f1a6 | 4753 | picrel->fdgoffhilo++; |
48d502e1 BS |
4754 | break; |
4755 | ||
4756 | case R_BFIN_FUNCDESC: | |
2774f1a6 | 4757 | picrel->fd++; |
48d502e1 BS |
4758 | picrel->relocsfd++; |
4759 | break; | |
4760 | ||
4761 | /* This relocation describes the C++ object vtable hierarchy. | |
4762 | Reconstruct it for later use during GC. */ | |
4763 | case R_BFIN_GNU_VTINHERIT: | |
4764 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
4765 | return FALSE; | |
4766 | break; | |
4767 | ||
4768 | /* This relocation describes which C++ vtable entries are actually | |
4769 | used. Record for later use during GC. */ | |
4770 | case R_BFIN_GNU_VTENTRY: | |
d17e0c6e JB |
4771 | BFD_ASSERT (h != NULL); |
4772 | if (h != NULL | |
4773 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
48d502e1 BS |
4774 | return FALSE; |
4775 | break; | |
4776 | ||
4777 | case R_huimm16: | |
4778 | case R_luimm16: | |
4779 | case R_pcrel12_jump_s: | |
4780 | case R_pcrel10: | |
4781 | break; | |
4782 | ||
4783 | default: | |
4784 | bad_reloc: | |
4785 | (*_bfd_error_handler) | |
4786 | (_("%B: unsupported relocation type %i"), | |
4787 | abfd, ELF32_R_TYPE (rel->r_info)); | |
4788 | return FALSE; | |
4789 | } | |
0f64bb02 CM |
4790 | } |
4791 | ||
4792 | return TRUE; | |
4793 | } | |
4794 | ||
48d502e1 BS |
4795 | /* Set the right machine number for a Blackfin ELF file. */ |
4796 | ||
4797 | static bfd_boolean | |
4798 | elf32_bfin_object_p (bfd *abfd) | |
4799 | { | |
4800 | bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0); | |
4801 | return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0) | |
4802 | == (IS_FDPIC (abfd))); | |
4803 | } | |
0f64bb02 | 4804 | |
0f64bb02 | 4805 | static bfd_boolean |
48d502e1 | 4806 | elf32_bfin_set_private_flags (bfd * abfd, flagword flags) |
0f64bb02 | 4807 | { |
48d502e1 BS |
4808 | elf_elfheader (abfd)->e_flags = flags; |
4809 | elf_flags_init (abfd) = TRUE; | |
4810 | return TRUE; | |
4811 | } | |
0f64bb02 | 4812 | |
48d502e1 BS |
4813 | /* Copy backend specific data from one object module to another. */ |
4814 | ||
4815 | static bfd_boolean | |
4816 | bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
4817 | { | |
0f64bb02 CM |
4818 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
4819 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
4820 | return TRUE; | |
4821 | ||
48d502e1 BS |
4822 | BFD_ASSERT (!elf_flags_init (obfd) |
4823 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
0f64bb02 | 4824 | |
48d502e1 BS |
4825 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
4826 | elf_flags_init (obfd) = TRUE; | |
104d59d1 JM |
4827 | |
4828 | /* Copy object attributes. */ | |
4829 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
4830 | ||
0f64bb02 CM |
4831 | return TRUE; |
4832 | } | |
4833 | ||
0f64bb02 | 4834 | static bfd_boolean |
48d502e1 | 4835 | elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
0f64bb02 | 4836 | { |
48d502e1 BS |
4837 | unsigned i; |
4838 | ||
4839 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
4840 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
4841 | return TRUE; | |
4842 | ||
4843 | if (! bfin_elf_copy_private_bfd_data (ibfd, obfd)) | |
4844 | return FALSE; | |
4845 | ||
4846 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr | |
4847 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) | |
4848 | return TRUE; | |
4849 | ||
4850 | /* Copy the stack size. */ | |
4851 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) | |
4852 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) | |
4853 | { | |
4854 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; | |
4855 | ||
4856 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) | |
4857 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) | |
4858 | { | |
4859 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); | |
4860 | ||
4861 | /* Rewrite the phdrs, since we're only called after they | |
4862 | were first written. */ | |
4863 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) | |
4864 | ->s->sizeof_ehdr, SEEK_SET) != 0 | |
4865 | || get_elf_backend_data (obfd)->s | |
4866 | ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, | |
4867 | elf_elfheader (obfd)->e_phnum) != 0) | |
4868 | return FALSE; | |
4869 | break; | |
4870 | } | |
4871 | ||
4872 | break; | |
4873 | } | |
4874 | ||
0f64bb02 CM |
4875 | return TRUE; |
4876 | } | |
4877 | ||
4878 | ||
4879 | /* Display the flags field. */ | |
4880 | static bfd_boolean | |
4881 | elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr) | |
4882 | { | |
4883 | FILE *file = (FILE *) ptr; | |
48d502e1 | 4884 | flagword flags; |
0f64bb02 CM |
4885 | |
4886 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
4887 | ||
4888 | /* Print normal ELF private data. */ | |
4889 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
4890 | ||
48d502e1 | 4891 | flags = elf_elfheader (abfd)->e_flags; |
0f64bb02 CM |
4892 | |
4893 | /* xgettext:c-format */ | |
4894 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
4895 | ||
48d502e1 BS |
4896 | if (flags & EF_BFIN_PIC) |
4897 | fprintf (file, " -fpic"); | |
4898 | ||
4899 | if (flags & EF_BFIN_FDPIC) | |
4900 | fprintf (file, " -mfdpic"); | |
4901 | ||
0f64bb02 CM |
4902 | fputc ('\n', file); |
4903 | ||
4904 | return TRUE; | |
4905 | } | |
4906 | ||
48d502e1 BS |
4907 | /* Merge backend specific data from an object file to the output |
4908 | object file when linking. */ | |
4909 | ||
4910 | static bfd_boolean | |
4911 | elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
4912 | { | |
7a84e3da | 4913 | flagword old_flags, new_flags; |
48d502e1 BS |
4914 | bfd_boolean error = FALSE; |
4915 | ||
4916 | new_flags = elf_elfheader (ibfd)->e_flags; | |
4917 | old_flags = elf_elfheader (obfd)->e_flags; | |
4918 | ||
4919 | if (new_flags & EF_BFIN_FDPIC) | |
4920 | new_flags &= ~EF_BFIN_PIC; | |
4921 | ||
4922 | #ifdef DEBUG | |
4923 | (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s", | |
4924 | old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", | |
4925 | bfd_get_filename (ibfd)); | |
4926 | #endif | |
4927 | ||
4928 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
4929 | { | |
4930 | elf_flags_init (obfd) = TRUE; | |
7a84e3da | 4931 | elf_elfheader (obfd)->e_flags = new_flags; |
48d502e1 BS |
4932 | } |
4933 | ||
7a84e3da | 4934 | if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd))) |
48d502e1 BS |
4935 | { |
4936 | error = TRUE; | |
4937 | if (IS_FDPIC (obfd)) | |
4938 | (*_bfd_error_handler) | |
4939 | (_("%s: cannot link non-fdpic object file into fdpic executable"), | |
4940 | bfd_get_filename (ibfd)); | |
4941 | else | |
4942 | (*_bfd_error_handler) | |
4943 | (_("%s: cannot link fdpic object file into non-fdpic executable"), | |
4944 | bfd_get_filename (ibfd)); | |
4945 | } | |
4946 | ||
4947 | if (error) | |
4948 | bfd_set_error (bfd_error_bad_value); | |
4949 | ||
4950 | return !error; | |
4951 | } | |
4952 | \f | |
0f64bb02 CM |
4953 | /* bfin ELF linker hash entry. */ |
4954 | ||
4955 | struct bfin_link_hash_entry | |
4956 | { | |
4957 | struct elf_link_hash_entry root; | |
4958 | ||
4959 | /* Number of PC relative relocs copied for this symbol. */ | |
4960 | struct bfin_pcrel_relocs_copied *pcrel_relocs_copied; | |
4961 | }; | |
4962 | ||
4963 | /* bfin ELF linker hash table. */ | |
4964 | ||
4965 | struct bfin_link_hash_table | |
4966 | { | |
4967 | struct elf_link_hash_table root; | |
4968 | ||
87d72d41 AM |
4969 | /* Small local sym cache. */ |
4970 | struct sym_cache sym_cache; | |
0f64bb02 CM |
4971 | }; |
4972 | ||
4973 | #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent)) | |
4974 | ||
4975 | static struct bfd_hash_entry * | |
4976 | bfin_link_hash_newfunc (struct bfd_hash_entry *entry, | |
48d502e1 | 4977 | struct bfd_hash_table *table, const char *string) |
0f64bb02 CM |
4978 | { |
4979 | struct bfd_hash_entry *ret = entry; | |
4980 | ||
4981 | /* Allocate the structure if it has not already been allocated by a | |
4982 | subclass. */ | |
4983 | if (ret == NULL) | |
4984 | ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry)); | |
4985 | if (ret == NULL) | |
4986 | return ret; | |
4987 | ||
4988 | /* Call the allocation method of the superclass. */ | |
4989 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); | |
4990 | if (ret != NULL) | |
4991 | bfin_hash_entry (ret)->pcrel_relocs_copied = NULL; | |
4992 | ||
4993 | return ret; | |
4994 | } | |
4995 | ||
4996 | /* Create an bfin ELF linker hash table. */ | |
4997 | ||
4998 | static struct bfd_link_hash_table * | |
4999 | bfin_link_hash_table_create (bfd * abfd) | |
5000 | { | |
5001 | struct bfin_link_hash_table *ret; | |
5002 | bfd_size_type amt = sizeof (struct bfin_link_hash_table); | |
5003 | ||
48d502e1 BS |
5004 | ret = bfd_zalloc (abfd, amt); |
5005 | if (ret == NULL) | |
0f64bb02 CM |
5006 | return NULL; |
5007 | ||
5008 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
66eb6687 | 5009 | bfin_link_hash_newfunc, |
48d502e1 | 5010 | sizeof (struct elf_link_hash_entry))) |
0f64bb02 CM |
5011 | { |
5012 | free (ret); | |
5013 | return NULL; | |
5014 | } | |
5015 | ||
87d72d41 | 5016 | ret->sym_cache.abfd = NULL; |
0f64bb02 CM |
5017 | |
5018 | return &ret->root.root; | |
5019 | } | |
5020 | ||
5021 | /* The size in bytes of an entry in the procedure linkage table. */ | |
5022 | ||
5023 | /* Finish up the dynamic sections. */ | |
5024 | ||
5025 | static bfd_boolean | |
5026 | bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, | |
5027 | struct bfd_link_info *info) | |
5028 | { | |
5029 | bfd *dynobj; | |
5030 | asection *sdyn; | |
5031 | ||
5032 | dynobj = elf_hash_table (info)->dynobj; | |
5033 | ||
5034 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5035 | ||
5036 | if (elf_hash_table (info)->dynamic_sections_created) | |
5037 | { | |
5038 | Elf32_External_Dyn *dyncon, *dynconend; | |
5039 | ||
5040 | BFD_ASSERT (sdyn != NULL); | |
5041 | ||
5042 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
5043 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
5044 | for (; dyncon < dynconend; dyncon++) | |
5045 | { | |
5046 | Elf_Internal_Dyn dyn; | |
5047 | ||
5048 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5049 | ||
5050 | } | |
5051 | ||
5052 | } | |
5053 | return TRUE; | |
5054 | } | |
5055 | ||
5056 | /* Finish up dynamic symbol handling. We set the contents of various | |
5057 | dynamic sections here. */ | |
5058 | ||
5059 | static bfd_boolean | |
5060 | bfin_finish_dynamic_symbol (bfd * output_bfd, | |
5061 | struct bfd_link_info *info, | |
5062 | struct elf_link_hash_entry *h, | |
5063 | Elf_Internal_Sym * sym) | |
5064 | { | |
5065 | bfd *dynobj; | |
5066 | ||
5067 | dynobj = elf_hash_table (info)->dynobj; | |
5068 | ||
5069 | if (h->got.offset != (bfd_vma) - 1) | |
5070 | { | |
5071 | asection *sgot; | |
5072 | asection *srela; | |
5073 | Elf_Internal_Rela rela; | |
5074 | bfd_byte *loc; | |
5075 | ||
5076 | /* This symbol has an entry in the global offset table. | |
5077 | Set it up. */ | |
5078 | ||
5079 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
5080 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
5081 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
5082 | ||
5083 | rela.r_offset = (sgot->output_section->vma | |
5084 | + sgot->output_offset | |
5085 | + (h->got.offset & ~(bfd_vma) 1)); | |
5086 | ||
5087 | /* If this is a -Bsymbolic link, and the symbol is defined | |
5088 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
5089 | the symbol was forced to be local because of a version file. | |
5090 | The entry in the global offset table will already have been | |
5091 | initialized in the relocate_section function. */ | |
5092 | if (info->shared | |
5093 | && (info->symbolic | |
5094 | || h->dynindx == -1 || h->forced_local) && h->def_regular) | |
5095 | { | |
5592d7ec | 5096 | fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__); |
0f64bb02 CM |
5097 | rela.r_info = ELF32_R_INFO (0, R_pcrel24); |
5098 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
5099 | (sgot->contents | |
5100 | + | |
5101 | (h->got. | |
5102 | offset & ~(bfd_vma) 1))); | |
5103 | } | |
5104 | else | |
5105 | { | |
5106 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
5107 | sgot->contents + (h->got.offset & ~(bfd_vma) 1)); | |
5108 | rela.r_info = ELF32_R_INFO (h->dynindx, R_got); | |
5109 | rela.r_addend = 0; | |
5110 | } | |
5111 | ||
5112 | loc = srela->contents; | |
5113 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
5114 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
5115 | } | |
5116 | ||
5117 | if (h->needs_copy) | |
5118 | { | |
5119 | BFD_ASSERT (0); | |
5120 | } | |
5121 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
5592d7ec | 5122 | if (strcmp (h->root.root.string, "__DYNAMIC") == 0 |
22edb2f1 | 5123 | || h == elf_hash_table (info)->hgot) |
0f64bb02 CM |
5124 | sym->st_shndx = SHN_ABS; |
5125 | ||
5126 | return TRUE; | |
5127 | } | |
5128 | ||
5129 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
5130 | regular object. The current definition is in some section of the | |
5131 | dynamic object, but we're not including those sections. We have to | |
5132 | change the definition to something the rest of the link can | |
5133 | understand. */ | |
5134 | ||
5135 | static bfd_boolean | |
5136 | bfin_adjust_dynamic_symbol (struct bfd_link_info *info, | |
5137 | struct elf_link_hash_entry *h) | |
5138 | { | |
5139 | bfd *dynobj; | |
5140 | asection *s; | |
5141 | unsigned int power_of_two; | |
5142 | ||
5143 | dynobj = elf_hash_table (info)->dynobj; | |
5144 | ||
5145 | /* Make sure we know what is going on here. */ | |
5146 | BFD_ASSERT (dynobj != NULL | |
5147 | && (h->needs_plt | |
5148 | || h->u.weakdef != NULL | |
5149 | || (h->def_dynamic && h->ref_regular && !h->def_regular))); | |
5150 | ||
5151 | /* If this is a function, put it in the procedure linkage table. We | |
5152 | will fill in the contents of the procedure linkage table later, | |
5153 | when we know the address of the .got section. */ | |
5154 | if (h->type == STT_FUNC || h->needs_plt) | |
5155 | { | |
5156 | BFD_ASSERT(0); | |
5157 | } | |
5158 | ||
5159 | /* If this is a weak symbol, and there is a real definition, the | |
5160 | processor independent code will have arranged for us to see the | |
5161 | real definition first, and we can just use the same value. */ | |
5162 | if (h->u.weakdef != NULL) | |
5163 | { | |
5164 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
5165 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
5166 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
5167 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
5168 | return TRUE; | |
5169 | } | |
5170 | ||
5171 | /* This is a reference to a symbol defined by a dynamic object which | |
5172 | is not a function. */ | |
5173 | ||
5174 | /* If we are creating a shared library, we must presume that the | |
5175 | only references to the symbol are via the global offset table. | |
5176 | For such cases we need not do anything here; the relocations will | |
5177 | be handled correctly by relocate_section. */ | |
5178 | if (info->shared) | |
5179 | return TRUE; | |
5180 | ||
5181 | /* We must allocate the symbol in our .dynbss section, which will | |
5182 | become part of the .bss section of the executable. There will be | |
5183 | an entry for this symbol in the .dynsym section. The dynamic | |
5184 | object will contain position independent code, so all references | |
5185 | from the dynamic object to this symbol will go through the global | |
5186 | offset table. The dynamic linker will use the .dynsym entry to | |
5187 | determine the address it must put in the global offset table, so | |
5188 | both the dynamic object and the regular object will refer to the | |
5189 | same memory location for the variable. */ | |
5190 | ||
5191 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
5192 | BFD_ASSERT (s != NULL); | |
5193 | ||
5194 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
5195 | copy the initial value out of the dynamic object and into the | |
5196 | runtime process image. We need to remember the offset into the | |
5197 | .rela.bss section we are going to use. */ | |
5198 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
5199 | { | |
5200 | asection *srel; | |
5201 | ||
5202 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
5203 | BFD_ASSERT (srel != NULL); | |
5204 | srel->size += sizeof (Elf32_External_Rela); | |
5205 | h->needs_copy = 1; | |
5206 | } | |
5207 | ||
5208 | /* We need to figure out the alignment required for this symbol. I | |
5209 | have no idea how ELF linkers handle this. */ | |
5210 | power_of_two = bfd_log2 (h->size); | |
5211 | if (power_of_two > 3) | |
5212 | power_of_two = 3; | |
5213 | ||
5214 | /* Apply the required alignment. */ | |
5215 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); | |
5216 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
5217 | { | |
5218 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
5219 | return FALSE; | |
5220 | } | |
5221 | ||
5222 | /* Define the symbol as being at this point in the section. */ | |
5223 | h->root.u.def.section = s; | |
5224 | h->root.u.def.value = s->size; | |
5225 | ||
5226 | /* Increment the section size to make room for the symbol. */ | |
5227 | s->size += h->size; | |
5228 | ||
5229 | return TRUE; | |
5230 | } | |
5231 | ||
5232 | /* The bfin linker needs to keep track of the number of relocs that it | |
5233 | decides to copy in check_relocs for each symbol. This is so that it | |
5234 | can discard PC relative relocs if it doesn't need them when linking | |
5235 | with -Bsymbolic. We store the information in a field extending the | |
5236 | regular ELF linker hash table. */ | |
5237 | ||
5238 | /* This structure keeps track of the number of PC relative relocs we have | |
5239 | copied for a given symbol. */ | |
5240 | ||
5241 | struct bfin_pcrel_relocs_copied | |
5242 | { | |
5243 | /* Next section. */ | |
5244 | struct bfin_pcrel_relocs_copied *next; | |
5245 | /* A section in dynobj. */ | |
5246 | asection *section; | |
5247 | /* Number of relocs copied in this section. */ | |
5248 | bfd_size_type count; | |
5249 | }; | |
5250 | ||
5251 | /* This function is called via elf_link_hash_traverse if we are | |
5252 | creating a shared object. In the -Bsymbolic case it discards the | |
5253 | space allocated to copy PC relative relocs against symbols which | |
5254 | are defined in regular objects. For the normal shared case, it | |
5255 | discards space for pc-relative relocs that have become local due to | |
5256 | symbol visibility changes. We allocated space for them in the | |
5257 | check_relocs routine, but we won't fill them in in the | |
5258 | relocate_section routine. | |
5259 | ||
5260 | We also check whether any of the remaining relocations apply | |
5261 | against a readonly section, and set the DF_TEXTREL flag in this | |
5262 | case. */ | |
5263 | ||
5264 | static bfd_boolean | |
5265 | bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf) | |
5266 | { | |
5267 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5268 | struct bfin_pcrel_relocs_copied *s; | |
5269 | ||
5270 | if (h->root.type == bfd_link_hash_warning) | |
5271 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5272 | ||
5273 | if (!h->def_regular || (!info->symbolic && !h->forced_local)) | |
5274 | { | |
5275 | if ((info->flags & DF_TEXTREL) == 0) | |
5276 | { | |
5277 | /* Look for relocations against read-only sections. */ | |
5278 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; | |
5279 | s != NULL; s = s->next) | |
5280 | if ((s->section->flags & SEC_READONLY) != 0) | |
5281 | { | |
5282 | info->flags |= DF_TEXTREL; | |
5283 | break; | |
5284 | } | |
5285 | } | |
5286 | ||
5287 | return TRUE; | |
5288 | } | |
5289 | ||
5290 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; | |
5291 | s != NULL; s = s->next) | |
5292 | s->section->size -= s->count * sizeof (Elf32_External_Rela); | |
5293 | ||
5294 | return TRUE; | |
5295 | } | |
5296 | ||
0f64bb02 CM |
5297 | static bfd_boolean |
5298 | bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, | |
5299 | struct bfd_link_info *info) | |
5300 | { | |
5301 | bfd *dynobj; | |
5302 | asection *s; | |
5303 | bfd_boolean relocs; | |
5304 | ||
5305 | dynobj = elf_hash_table (info)->dynobj; | |
5306 | BFD_ASSERT (dynobj != NULL); | |
5307 | ||
5308 | if (elf_hash_table (info)->dynamic_sections_created) | |
5309 | { | |
5310 | /* Set the contents of the .interp section to the interpreter. */ | |
5311 | if (info->executable) | |
5312 | { | |
5313 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
5314 | BFD_ASSERT (s != NULL); | |
5315 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
5316 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
5317 | } | |
5318 | } | |
5319 | else | |
5320 | { | |
5321 | /* We may have created entries in the .rela.got section. | |
5322 | However, if we are not creating the dynamic sections, we will | |
5323 | not actually use these entries. Reset the size of .rela.got, | |
5324 | which will cause it to get stripped from the output file | |
5325 | below. */ | |
5326 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
5327 | if (s != NULL) | |
5328 | s->size = 0; | |
5329 | } | |
5330 | ||
5331 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
5332 | PC relative relocs against symbols defined in a regular object. | |
5333 | For the normal shared case we discard the PC relative relocs | |
5334 | against symbols that have become local due to visibility changes. | |
5335 | We allocated space for them in the check_relocs routine, but we | |
5336 | will not fill them in in the relocate_section routine. */ | |
5337 | if (info->shared) | |
5338 | elf_link_hash_traverse (elf_hash_table (info), | |
5339 | bfin_discard_copies, (PTR) info); | |
5340 | ||
5341 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
5342 | determined the sizes of the various dynamic sections. Allocate | |
5343 | memory for them. */ | |
5344 | relocs = FALSE; | |
5345 | for (s = dynobj->sections; s != NULL; s = s->next) | |
5346 | { | |
5347 | const char *name; | |
5348 | bfd_boolean strip; | |
5349 | ||
5350 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
5351 | continue; | |
5352 | ||
5353 | /* It's OK to base decisions on the section name, because none | |
5354 | of the dynobj section names depend upon the input files. */ | |
5355 | name = bfd_get_section_name (dynobj, s); | |
5356 | ||
5357 | strip = FALSE; | |
5358 | ||
0112cd26 | 5359 | if (CONST_STRNEQ (name, ".rela")) |
0f64bb02 CM |
5360 | { |
5361 | if (s->size == 0) | |
5362 | { | |
5363 | /* If we don't need this section, strip it from the | |
5364 | output file. This is mostly to handle .rela.bss and | |
5365 | .rela.plt. We must create both sections in | |
5366 | create_dynamic_sections, because they must be created | |
5367 | before the linker maps input sections to output | |
5368 | sections. The linker does that before | |
5369 | adjust_dynamic_symbol is called, and it is that | |
5370 | function which decides whether anything needs to go | |
5371 | into these sections. */ | |
5372 | strip = TRUE; | |
5373 | } | |
5374 | else | |
5375 | { | |
5376 | relocs = TRUE; | |
5377 | ||
5378 | /* We use the reloc_count field as a counter if we need | |
5379 | to copy relocs into the output file. */ | |
5380 | s->reloc_count = 0; | |
5381 | } | |
5382 | } | |
0112cd26 | 5383 | else if (! CONST_STRNEQ (name, ".got")) |
0f64bb02 CM |
5384 | { |
5385 | /* It's not one of our sections, so don't allocate space. */ | |
5386 | continue; | |
5387 | } | |
5388 | ||
5389 | if (strip) | |
5390 | { | |
5391 | s->flags |= SEC_EXCLUDE; | |
5392 | continue; | |
5393 | } | |
5394 | ||
5395 | /* Allocate memory for the section contents. */ | |
5396 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. | |
5397 | Unused entries should be reclaimed before the section's contents | |
5398 | are written out, but at the moment this does not happen. Thus in | |
5399 | order to prevent writing out garbage, we initialise the section's | |
5400 | contents to zero. */ | |
5401 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
5402 | if (s->contents == NULL && s->size != 0) | |
5403 | return FALSE; | |
5404 | } | |
5405 | ||
5406 | if (elf_hash_table (info)->dynamic_sections_created) | |
5407 | { | |
5408 | /* Add some entries to the .dynamic section. We fill in the | |
5409 | values later, in bfin_finish_dynamic_sections, but we | |
5410 | must add the entries now so that we get the correct size for | |
5411 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
5412 | dynamic linker and used by the debugger. */ | |
5413 | #define add_dynamic_entry(TAG, VAL) \ | |
5414 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
5415 | ||
5416 | if (!info->shared) | |
5417 | { | |
5418 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
5419 | return FALSE; | |
5420 | } | |
5421 | ||
5422 | ||
5423 | if (relocs) | |
5424 | { | |
5425 | if (!add_dynamic_entry (DT_RELA, 0) | |
5426 | || !add_dynamic_entry (DT_RELASZ, 0) | |
5427 | || !add_dynamic_entry (DT_RELAENT, | |
5428 | sizeof (Elf32_External_Rela))) | |
5429 | return FALSE; | |
5430 | } | |
5431 | ||
5432 | if ((info->flags & DF_TEXTREL) != 0) | |
5433 | { | |
5434 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
5435 | return FALSE; | |
5436 | } | |
5437 | } | |
5438 | #undef add_dynamic_entry | |
5439 | ||
5440 | return TRUE; | |
5441 | } | |
48d502e1 | 5442 | \f |
0f64bb02 CM |
5443 | /* Given a .data section and a .emreloc in-memory section, store |
5444 | relocation information into the .emreloc section which can be | |
5445 | used at runtime to relocate the section. This is called by the | |
5446 | linker when the --embedded-relocs switch is used. This is called | |
5447 | after the add_symbols entry point has been called for all the | |
5448 | objects, and before the final_link entry point is called. */ | |
5449 | ||
3b55e94a BS |
5450 | bfd_boolean bfd_bfin_elf32_create_embedded_relocs |
5451 | PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **)); | |
5452 | ||
0f64bb02 CM |
5453 | bfd_boolean |
5454 | bfd_bfin_elf32_create_embedded_relocs ( | |
5455 | bfd *abfd, | |
5456 | struct bfd_link_info *info, | |
5457 | asection *datasec, | |
5458 | asection *relsec, | |
5459 | char **errmsg) | |
5460 | { | |
5461 | Elf_Internal_Shdr *symtab_hdr; | |
5462 | Elf_Internal_Sym *isymbuf = NULL; | |
5463 | Elf_Internal_Rela *internal_relocs = NULL; | |
5464 | Elf_Internal_Rela *irel, *irelend; | |
5465 | bfd_byte *p; | |
5466 | bfd_size_type amt; | |
5467 | ||
5468 | BFD_ASSERT (! info->relocatable); | |
5469 | ||
5470 | *errmsg = NULL; | |
5471 | ||
5472 | if (datasec->reloc_count == 0) | |
5473 | return TRUE; | |
5474 | ||
5475 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5476 | ||
5477 | /* Get a copy of the native relocations. */ | |
5478 | internal_relocs = (_bfd_elf_link_read_relocs | |
5479 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
5480 | info->keep_memory)); | |
5481 | if (internal_relocs == NULL) | |
5482 | goto error_return; | |
5483 | ||
5484 | amt = (bfd_size_type) datasec->reloc_count * 12; | |
5485 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
5486 | if (relsec->contents == NULL) | |
5487 | goto error_return; | |
5488 | ||
5489 | p = relsec->contents; | |
5490 | ||
5491 | irelend = internal_relocs + datasec->reloc_count; | |
5492 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
5493 | { | |
5494 | asection *targetsec; | |
5495 | ||
5496 | /* We are going to write a four byte longword into the runtime | |
5497 | reloc section. The longword will be the address in the data | |
5498 | section which must be relocated. It is followed by the name | |
5499 | of the target section NUL-padded or truncated to 8 | |
5500 | characters. */ | |
5501 | ||
5502 | /* We can only relocate absolute longword relocs at run time. */ | |
5503 | if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data) | |
5504 | { | |
5505 | *errmsg = _("unsupported reloc type"); | |
5506 | bfd_set_error (bfd_error_bad_value); | |
5507 | goto error_return; | |
5508 | } | |
5509 | ||
5510 | /* Get the target section referred to by the reloc. */ | |
5511 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
5512 | { | |
5513 | /* A local symbol. */ | |
5514 | Elf_Internal_Sym *isym; | |
5515 | ||
5516 | /* Read this BFD's local symbols if we haven't done so already. */ | |
5517 | if (isymbuf == NULL) | |
5518 | { | |
5519 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
5520 | if (isymbuf == NULL) | |
5521 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
5522 | symtab_hdr->sh_info, 0, | |
5523 | NULL, NULL, NULL); | |
5524 | if (isymbuf == NULL) | |
5525 | goto error_return; | |
5526 | } | |
5527 | ||
5528 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
5529 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
5530 | } | |
5531 | else | |
5532 | { | |
5533 | unsigned long indx; | |
5534 | struct elf_link_hash_entry *h; | |
5535 | ||
5536 | /* An external symbol. */ | |
5537 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
5538 | h = elf_sym_hashes (abfd)[indx]; | |
5539 | BFD_ASSERT (h != NULL); | |
5540 | if (h->root.type == bfd_link_hash_defined | |
5541 | || h->root.type == bfd_link_hash_defweak) | |
5542 | targetsec = h->root.u.def.section; | |
5543 | else | |
5544 | targetsec = NULL; | |
5545 | } | |
5546 | ||
5547 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
5548 | memset (p + 4, 0, 8); | |
5549 | if (targetsec != NULL) | |
9ba4c445 | 5550 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
0f64bb02 CM |
5551 | } |
5552 | ||
5553 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
5554 | free (isymbuf); | |
5555 | if (internal_relocs != NULL | |
5556 | && elf_section_data (datasec)->relocs != internal_relocs) | |
5557 | free (internal_relocs); | |
5558 | return TRUE; | |
5559 | ||
5560 | error_return: | |
5561 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
5562 | free (isymbuf); | |
5563 | if (internal_relocs != NULL | |
5564 | && elf_section_data (datasec)->relocs != internal_relocs) | |
5565 | free (internal_relocs); | |
5566 | return FALSE; | |
5567 | } | |
b0a0b978 JZ |
5568 | |
5569 | struct bfd_elf_special_section const elf32_bfin_special_sections[] = | |
5570 | { | |
5571 | { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
5572 | { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
5573 | { NULL, 0, 0, 0, 0 } | |
5574 | }; | |
5575 | ||
48d502e1 | 5576 | \f |
0f64bb02 CM |
5577 | #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec |
5578 | #define TARGET_LITTLE_NAME "elf32-bfin" | |
5579 | #define ELF_ARCH bfd_arch_bfin | |
3b55e94a | 5580 | #define ELF_MACHINE_CODE EM_BLACKFIN |
0f64bb02 CM |
5581 | #define ELF_MAXPAGESIZE 0x1000 |
5582 | #define elf_symbol_leading_char '_' | |
5583 | ||
5584 | #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup | |
157090f7 AM |
5585 | #define bfd_elf32_bfd_reloc_name_lookup \ |
5586 | bfin_bfd_reloc_name_lookup | |
0f64bb02 CM |
5587 | #define elf_info_to_howto bfin_info_to_howto |
5588 | #define elf_info_to_howto_rel 0 | |
48d502e1 | 5589 | #define elf_backend_object_p elf32_bfin_object_p |
0f64bb02 CM |
5590 | |
5591 | #define bfd_elf32_bfd_is_local_label_name \ | |
5592 | bfin_is_local_label_name | |
5593 | #define bfin_hash_table(p) \ | |
5594 | ((struct bfin_link_hash_table *) (p)->hash) | |
5595 | ||
5596 | ||
5597 | ||
5598 | #define elf_backend_create_dynamic_sections \ | |
5599 | _bfd_elf_create_dynamic_sections | |
5600 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5601 | bfin_link_hash_table_create | |
5602 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link | |
5603 | ||
48d502e1 | 5604 | #define elf_backend_check_relocs bfin_check_relocs |
0f64bb02 CM |
5605 | #define elf_backend_adjust_dynamic_symbol \ |
5606 | bfin_adjust_dynamic_symbol | |
5607 | #define elf_backend_size_dynamic_sections \ | |
5608 | bfin_size_dynamic_sections | |
5609 | #define elf_backend_relocate_section bfin_relocate_section | |
5610 | #define elf_backend_finish_dynamic_symbol \ | |
5611 | bfin_finish_dynamic_symbol | |
5612 | #define elf_backend_finish_dynamic_sections \ | |
5613 | bfin_finish_dynamic_sections | |
5614 | #define elf_backend_gc_mark_hook bfin_gc_mark_hook | |
5615 | #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook | |
5616 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
5617 | elf32_bfin_merge_private_bfd_data | |
5618 | #define bfd_elf32_bfd_set_private_flags \ | |
5619 | elf32_bfin_set_private_flags | |
5620 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
5621 | elf32_bfin_print_private_bfd_data | |
5622 | #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class | |
5623 | #define elf_backend_can_gc_sections 1 | |
b0a0b978 | 5624 | #define elf_backend_special_sections elf32_bfin_special_sections |
0f64bb02 CM |
5625 | #define elf_backend_can_refcount 1 |
5626 | #define elf_backend_want_got_plt 0 | |
5627 | #define elf_backend_plt_readonly 1 | |
5628 | #define elf_backend_want_plt_sym 0 | |
5629 | #define elf_backend_got_header_size 12 | |
5630 | #define elf_backend_rela_normal 1 | |
5631 | ||
48d502e1 BS |
5632 | #include "elf32-target.h" |
5633 | ||
5634 | #undef TARGET_LITTLE_SYM | |
5635 | #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec | |
5636 | #undef TARGET_LITTLE_NAME | |
5637 | #define TARGET_LITTLE_NAME "elf32-bfinfdpic" | |
5638 | #undef elf32_bed | |
5639 | #define elf32_bed elf32_bfinfdpic_bed | |
5640 | ||
5641 | #undef elf_backend_gc_sweep_hook | |
2774f1a6 | 5642 | #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook |
48d502e1 BS |
5643 | |
5644 | #undef elf_backend_got_header_size | |
5645 | #define elf_backend_got_header_size 0 | |
5646 | ||
5647 | #undef elf_backend_relocate_section | |
5648 | #define elf_backend_relocate_section bfinfdpic_relocate_section | |
5649 | #undef elf_backend_check_relocs | |
5650 | #define elf_backend_check_relocs bfinfdpic_check_relocs | |
5651 | ||
5652 | #undef bfd_elf32_bfd_link_hash_table_create | |
5653 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5654 | bfinfdpic_elf_link_hash_table_create | |
5655 | #undef elf_backend_always_size_sections | |
5656 | #define elf_backend_always_size_sections \ | |
5657 | elf32_bfinfdpic_always_size_sections | |
e36284ab AM |
5658 | #undef elf_backend_modify_program_headers |
5659 | #define elf_backend_modify_program_headers \ | |
5660 | elf32_bfinfdpic_modify_program_headers | |
48d502e1 BS |
5661 | #undef bfd_elf32_bfd_copy_private_bfd_data |
5662 | #define bfd_elf32_bfd_copy_private_bfd_data \ | |
5663 | elf32_bfinfdpic_copy_private_bfd_data | |
5664 | ||
5665 | #undef elf_backend_create_dynamic_sections | |
5666 | #define elf_backend_create_dynamic_sections \ | |
5667 | elf32_bfinfdpic_create_dynamic_sections | |
5668 | #undef elf_backend_adjust_dynamic_symbol | |
5669 | #define elf_backend_adjust_dynamic_symbol \ | |
5670 | elf32_bfinfdpic_adjust_dynamic_symbol | |
5671 | #undef elf_backend_size_dynamic_sections | |
5672 | #define elf_backend_size_dynamic_sections \ | |
5673 | elf32_bfinfdpic_size_dynamic_sections | |
5674 | #undef elf_backend_finish_dynamic_symbol | |
5675 | #define elf_backend_finish_dynamic_symbol \ | |
5676 | elf32_bfinfdpic_finish_dynamic_symbol | |
5677 | #undef elf_backend_finish_dynamic_sections | |
5678 | #define elf_backend_finish_dynamic_sections \ | |
5679 | elf32_bfinfdpic_finish_dynamic_sections | |
5680 | ||
5681 | #undef elf_backend_can_make_relative_eh_frame | |
5682 | #define elf_backend_can_make_relative_eh_frame \ | |
5683 | bfinfdpic_elf_use_relative_eh_frame | |
5684 | #undef elf_backend_can_make_lsda_relative_eh_frame | |
5685 | #define elf_backend_can_make_lsda_relative_eh_frame \ | |
5686 | bfinfdpic_elf_use_relative_eh_frame | |
5687 | #undef elf_backend_encode_eh_address | |
5688 | #define elf_backend_encode_eh_address \ | |
5689 | bfinfdpic_elf_encode_eh_address | |
5690 | ||
5691 | #undef elf_backend_may_use_rel_p | |
5692 | #define elf_backend_may_use_rel_p 1 | |
5693 | #undef elf_backend_may_use_rela_p | |
5694 | #define elf_backend_may_use_rela_p 1 | |
5695 | /* We use REL for dynamic relocations only. */ | |
5696 | #undef elf_backend_default_use_rela_p | |
5697 | #define elf_backend_default_use_rela_p 1 | |
5698 | ||
5699 | #undef elf_backend_omit_section_dynsym | |
5700 | #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym | |
0f64bb02 CM |
5701 | |
5702 | #include "elf32-target.h" |