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" | |
48d502e1 BS |
26 | #include "elf/dwarf2.h" |
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$. */ | |
1124 | static bfd_boolean | |
1125 | bfin_is_local_label_name ( | |
1126 | bfd *abfd ATTRIBUTE_UNUSED, | |
1127 | const char *label) | |
1128 | { | |
1129 | if (label[0] == 'L' && label[1] == '$' ) | |
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 BS |
1152 | asection *srelgot; |
1153 | asection *sreloc; | |
1154 | if (info->relocatable) | |
1155 | return TRUE; | |
48d502e1 | 1156 | |
c96a8570 BS |
1157 | dynobj = elf_hash_table (info)->dynobj; |
1158 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1159 | sym_hashes = elf_sym_hashes (abfd); | |
1160 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
48d502e1 | 1161 | |
c96a8570 BS |
1162 | sgot = NULL; |
1163 | srelgot = NULL; | |
1164 | sreloc = NULL; | |
48d502e1 | 1165 | |
c96a8570 BS |
1166 | rel_end = relocs + sec->reloc_count; |
1167 | for (rel = relocs; rel < rel_end; rel++) | |
48d502e1 | 1168 | { |
c96a8570 BS |
1169 | unsigned long r_symndx; |
1170 | struct elf_link_hash_entry *h; | |
48d502e1 | 1171 | |
c96a8570 BS |
1172 | r_symndx = ELF32_R_SYM (rel->r_info); |
1173 | if (r_symndx < symtab_hdr->sh_info) | |
1174 | h = NULL; | |
1175 | else | |
1176 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
48d502e1 | 1177 | |
c96a8570 BS |
1178 | switch (ELF32_R_TYPE (rel->r_info)) |
1179 | { | |
1180 | /* This relocation describes the C++ object vtable hierarchy. | |
1181 | Reconstruct it for later use during GC. */ | |
1182 | case R_BFIN_GNU_VTINHERIT: | |
1183 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1184 | return FALSE; | |
1185 | break; | |
48d502e1 | 1186 | |
c96a8570 BS |
1187 | /* This relocation describes which C++ vtable entries |
1188 | are actually used. Record for later use during GC. */ | |
1189 | case R_BFIN_GNU_VTENTRY: | |
1190 | BFD_ASSERT (h != NULL); | |
1191 | if (h != NULL | |
1192 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1193 | return FALSE; | |
1194 | break; | |
48d502e1 | 1195 | |
c96a8570 BS |
1196 | case R_got: |
1197 | if (h != NULL | |
1198 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) | |
1199 | break; | |
1200 | /* Fall through. */ | |
48d502e1 | 1201 | |
c96a8570 BS |
1202 | if (dynobj == NULL) |
1203 | { | |
1204 | /* Create the .got section. */ | |
1205 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
1206 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
1207 | return FALSE; | |
1208 | } | |
48d502e1 | 1209 | |
c96a8570 BS |
1210 | if (sgot == NULL) |
1211 | { | |
1212 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1213 | BFD_ASSERT (sgot != NULL); | |
1214 | } | |
48d502e1 | 1215 | |
c96a8570 BS |
1216 | if (srelgot == NULL && (h != NULL || info->shared)) |
1217 | { | |
1218 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1219 | if (srelgot == NULL) | |
1220 | { | |
1221 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1222 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
1223 | | SEC_READONLY); | |
1224 | srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", | |
1225 | flags); | |
1226 | if (srelgot == NULL | |
1227 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
1228 | return FALSE; | |
1229 | } | |
1230 | } | |
48d502e1 | 1231 | |
c96a8570 BS |
1232 | if (h != NULL) |
1233 | { | |
1234 | if (h->got.refcount == 0) | |
1235 | { | |
1236 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1237 | if (h->dynindx == -1 && !h->forced_local) | |
1238 | { | |
1239 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
1240 | return FALSE; | |
1241 | } | |
48d502e1 | 1242 | |
c96a8570 BS |
1243 | /* Allocate space in the .got section. */ |
1244 | sgot->size += 4; | |
1245 | /* Allocate relocation space. */ | |
1246 | srelgot->size += sizeof (Elf32_External_Rela); | |
1247 | } | |
1248 | h->got.refcount++; | |
1249 | } | |
1250 | else | |
1251 | { | |
1252 | /* This is a global offset table entry for a local symbol. */ | |
1253 | if (local_got_refcounts == NULL) | |
1254 | { | |
1255 | bfd_size_type size; | |
48d502e1 | 1256 | |
c96a8570 BS |
1257 | size = symtab_hdr->sh_info; |
1258 | size *= sizeof (bfd_signed_vma); | |
1259 | local_got_refcounts = ((bfd_signed_vma *) | |
1260 | bfd_zalloc (abfd, size)); | |
1261 | if (local_got_refcounts == NULL) | |
1262 | return FALSE; | |
1263 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
1264 | } | |
1265 | if (local_got_refcounts[r_symndx] == 0) | |
1266 | { | |
1267 | sgot->size += 4; | |
1268 | if (info->shared) | |
1269 | { | |
1270 | /* If we are generating a shared object, we need to | |
1271 | output a R_68K_RELATIVE reloc so that the dynamic | |
1272 | linker can adjust this GOT entry. */ | |
1273 | srelgot->size += sizeof (Elf32_External_Rela); | |
1274 | } | |
1275 | } | |
1276 | local_got_refcounts[r_symndx]++; | |
1277 | } | |
1278 | break; | |
48d502e1 | 1279 | |
c96a8570 BS |
1280 | default: |
1281 | break; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | return TRUE; | |
48d502e1 BS |
1286 | } |
1287 | ||
c96a8570 BS |
1288 | static enum elf_reloc_type_class |
1289 | elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela) | |
48d502e1 | 1290 | { |
c96a8570 BS |
1291 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
1292 | { | |
1293 | default: | |
1294 | return reloc_class_normal; | |
1295 | } | |
1296 | } | |
1297 | \f | |
1298 | static bfd_reloc_status_type | |
1299 | bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto, | |
1300 | bfd *input_bfd, asection *input_section, | |
1301 | bfd_byte *contents, bfd_vma address, | |
1302 | bfd_vma value, bfd_vma addend) | |
1303 | { | |
1304 | int r_type = ELF32_R_TYPE (rel->r_info); | |
48d502e1 | 1305 | |
c96a8570 BS |
1306 | if (r_type == R_pcrel24 || r_type == R_pcrel24_jump_l) |
1307 | { | |
1308 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1309 | bfd_vma x; | |
48d502e1 | 1310 | |
c96a8570 BS |
1311 | if (address > bfd_get_section_limit (input_bfd, input_section)) |
1312 | return bfd_reloc_outofrange; | |
48d502e1 | 1313 | |
c96a8570 | 1314 | value += addend; |
48d502e1 | 1315 | |
c96a8570 BS |
1316 | /* Perform usual pc-relative correction. */ |
1317 | value -= input_section->output_section->vma + input_section->output_offset; | |
1318 | value -= address; | |
48d502e1 | 1319 | |
c96a8570 BS |
1320 | /* We are getting reloc_entry->address 2 byte off from |
1321 | the start of instruction. Assuming absolute postion | |
1322 | of the reloc data. But, following code had been written assuming | |
1323 | reloc address is starting at begining of instruction. | |
1324 | To compensate that I have increased the value of | |
1325 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ | |
48d502e1 | 1326 | |
c96a8570 BS |
1327 | value += 2; |
1328 | address -= 2; | |
48d502e1 | 1329 | |
c96a8570 BS |
1330 | if ((value & 0xFF000000) != 0 |
1331 | && (value & 0xFF000000) != 0xFF000000) | |
1332 | r = bfd_reloc_overflow; | |
48d502e1 | 1333 | |
c96a8570 | 1334 | value >>= 1; |
48d502e1 | 1335 | |
c96a8570 BS |
1336 | x = bfd_get_16 (input_bfd, contents + address); |
1337 | x = (x & 0xff00) | ((value >> 16) & 0xff); | |
1338 | bfd_put_16 (input_bfd, x, contents + address); | |
48d502e1 | 1339 | |
c96a8570 BS |
1340 | x = bfd_get_16 (input_bfd, contents + address + 2); |
1341 | x = value & 0xFFFF; | |
1342 | bfd_put_16 (input_bfd, x, contents + address + 2); | |
1343 | return r; | |
1344 | } | |
48d502e1 | 1345 | |
c96a8570 BS |
1346 | return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, |
1347 | rel->r_offset, value, addend); | |
48d502e1 | 1348 | |
48d502e1 BS |
1349 | } |
1350 | ||
c96a8570 BS |
1351 | static bfd_boolean |
1352 | bfin_relocate_section (bfd * output_bfd, | |
1353 | struct bfd_link_info *info, | |
1354 | bfd * input_bfd, | |
1355 | asection * input_section, | |
1356 | bfd_byte * contents, | |
1357 | Elf_Internal_Rela * relocs, | |
1358 | Elf_Internal_Sym * local_syms, | |
1359 | asection ** local_sections) | |
48d502e1 | 1360 | { |
c96a8570 BS |
1361 | bfd *dynobj; |
1362 | Elf_Internal_Shdr *symtab_hdr; | |
1363 | struct elf_link_hash_entry **sym_hashes; | |
1364 | bfd_vma *local_got_offsets; | |
1365 | asection *sgot; | |
1366 | asection *sreloc; | |
1367 | Elf_Internal_Rela *rel; | |
1368 | Elf_Internal_Rela *relend; | |
1369 | int i = 0; | |
48d502e1 | 1370 | |
c96a8570 BS |
1371 | dynobj = elf_hash_table (info)->dynobj; |
1372 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1373 | sym_hashes = elf_sym_hashes (input_bfd); | |
1374 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
48d502e1 | 1375 | |
c96a8570 BS |
1376 | sgot = NULL; |
1377 | sreloc = NULL; | |
48d502e1 | 1378 | |
c96a8570 BS |
1379 | rel = relocs; |
1380 | relend = relocs + input_section->reloc_count; | |
1381 | for (; rel < relend; rel++, i++) | |
1382 | { | |
1383 | int r_type; | |
1384 | reloc_howto_type *howto; | |
1385 | unsigned long r_symndx; | |
1386 | struct elf_link_hash_entry *h; | |
1387 | Elf_Internal_Sym *sym; | |
1388 | asection *sec; | |
1389 | bfd_vma relocation = 0; | |
1390 | bfd_boolean unresolved_reloc; | |
1391 | bfd_reloc_status_type r; | |
1392 | bfd_vma address; | |
48d502e1 | 1393 | |
c96a8570 BS |
1394 | r_type = ELF32_R_TYPE (rel->r_info); |
1395 | if (r_type < 0 || r_type >= 243) | |
1396 | { | |
1397 | bfd_set_error (bfd_error_bad_value); | |
1398 | return FALSE; | |
1399 | } | |
48d502e1 | 1400 | |
c96a8570 BS |
1401 | if (r_type == R_BFIN_GNU_VTENTRY |
1402 | || r_type == R_BFIN_GNU_VTINHERIT) | |
1403 | continue; | |
48d502e1 | 1404 | |
c96a8570 BS |
1405 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
1406 | if (howto == NULL) | |
1407 | { | |
1408 | bfd_set_error (bfd_error_bad_value); | |
1409 | return FALSE; | |
1410 | } | |
1411 | r_symndx = ELF32_R_SYM (rel->r_info); | |
48d502e1 | 1412 | |
c96a8570 BS |
1413 | h = NULL; |
1414 | sym = NULL; | |
1415 | sec = NULL; | |
1416 | unresolved_reloc = FALSE; | |
48d502e1 | 1417 | |
c96a8570 BS |
1418 | if (r_symndx < symtab_hdr->sh_info) |
1419 | { | |
1420 | sym = local_syms + r_symndx; | |
1421 | sec = local_sections[r_symndx]; | |
1422 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1423 | } | |
1424 | else | |
1425 | { | |
1426 | bfd_boolean warned; | |
48d502e1 | 1427 | |
c96a8570 BS |
1428 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1429 | r_symndx, symtab_hdr, sym_hashes, | |
1430 | h, sec, relocation, | |
1431 | unresolved_reloc, warned); | |
1432 | } | |
48d502e1 | 1433 | |
c96a8570 BS |
1434 | if (sec != NULL && elf_discarded_section (sec)) |
1435 | { | |
1436 | /* For relocs against symbols from removed linkonce sections, | |
1437 | or sections discarded by a linker script, we just want the | |
1438 | section contents zeroed. Avoid any special processing. */ | |
1439 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1440 | rel->r_info = 0; | |
1441 | rel->r_addend = 0; | |
1442 | continue; | |
1443 | } | |
48d502e1 | 1444 | |
c96a8570 BS |
1445 | if (info->relocatable) |
1446 | continue; | |
48d502e1 | 1447 | |
c96a8570 | 1448 | address = rel->r_offset; |
48d502e1 | 1449 | |
c96a8570 BS |
1450 | /* Then, process normally. */ |
1451 | switch (r_type) | |
1452 | { | |
1453 | case R_BFIN_GNU_VTINHERIT: | |
1454 | case R_BFIN_GNU_VTENTRY: | |
1455 | return bfd_reloc_ok; | |
48d502e1 | 1456 | |
c96a8570 BS |
1457 | case R_got: |
1458 | /* Relocation is to the address of the entry for this symbol | |
1459 | in the global offset table. */ | |
1460 | if (h != NULL | |
1461 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) | |
1462 | goto do_default; | |
1463 | /* Fall through. */ | |
1464 | /* Relocation is the offset of the entry for this symbol in | |
1465 | the global offset table. */ | |
48d502e1 | 1466 | |
c96a8570 BS |
1467 | { |
1468 | bfd_vma off; | |
48d502e1 | 1469 | |
c96a8570 BS |
1470 | if (dynobj == NULL) |
1471 | { | |
1472 | /* Create the .got section. */ | |
1473 | elf_hash_table (info)->dynobj = dynobj = output_bfd; | |
1474 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
1475 | return FALSE; | |
1476 | } | |
48d502e1 | 1477 | |
c96a8570 BS |
1478 | if (sgot == NULL) |
1479 | { | |
1480 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1481 | BFD_ASSERT (sgot != NULL); | |
1482 | } | |
48d502e1 | 1483 | |
c96a8570 BS |
1484 | if (h != NULL) |
1485 | { | |
1486 | bfd_boolean dyn; | |
48d502e1 | 1487 | |
c96a8570 BS |
1488 | off = h->got.offset; |
1489 | BFD_ASSERT (off != (bfd_vma) - 1); | |
1490 | dyn = elf_hash_table (info)->dynamic_sections_created; | |
48d502e1 | 1491 | |
c96a8570 BS |
1492 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
1493 | || (info->shared | |
1494 | && (info->symbolic | |
1495 | || h->dynindx == -1 | |
1496 | || h->forced_local) | |
1497 | && h->def_regular)) | |
1498 | { | |
1499 | /* This is actually a static link, or it is a | |
1500 | -Bsymbolic link and the symbol is defined | |
1501 | locally, or the symbol was forced to be local | |
1502 | because of a version file.. We must initialize | |
1503 | this entry in the global offset table. Since | |
1504 | the offset must always be a multiple of 4, we | |
1505 | use the least significant bit to record whether | |
1506 | we have initialized it already. | |
48d502e1 | 1507 | |
c96a8570 BS |
1508 | When doing a dynamic link, we create a .rela.got |
1509 | relocation entry to initialize the value. This | |
1510 | is done in the finish_dynamic_symbol routine. */ | |
1511 | if ((off & 1) != 0) | |
1512 | off &= ~1; | |
1513 | else | |
1514 | { | |
1515 | bfd_put_32 (output_bfd, relocation, | |
1516 | sgot->contents + off); | |
1517 | h->got.offset |= 1; | |
1518 | } | |
1519 | } | |
1520 | else | |
1521 | unresolved_reloc = FALSE; | |
1522 | } | |
1523 | else | |
1524 | { | |
1525 | BFD_ASSERT (local_got_offsets != NULL); | |
1526 | off = local_got_offsets[r_symndx]; | |
1527 | BFD_ASSERT (off != (bfd_vma) - 1); | |
48d502e1 | 1528 | |
c96a8570 BS |
1529 | /* The offset must always be a multiple of 4. We use |
1530 | the least significant bit to record whether we have | |
1531 | already generated the necessary reloc. */ | |
1532 | if ((off & 1) != 0) | |
1533 | off &= ~1; | |
1534 | else | |
1535 | { | |
1536 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
48d502e1 | 1537 | |
c96a8570 BS |
1538 | if (info->shared) |
1539 | { | |
1540 | asection *s; | |
1541 | Elf_Internal_Rela outrel; | |
1542 | bfd_byte *loc; | |
48d502e1 | 1543 | |
c96a8570 BS |
1544 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1545 | BFD_ASSERT (s != NULL); | |
48d502e1 | 1546 | |
c96a8570 BS |
1547 | outrel.r_offset = (sgot->output_section->vma |
1548 | + sgot->output_offset + off); | |
1549 | outrel.r_info = | |
1550 | ELF32_R_INFO (0, R_pcrel24); | |
1551 | outrel.r_addend = relocation; | |
1552 | loc = s->contents; | |
1553 | loc += | |
1554 | s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1555 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1556 | } | |
48d502e1 | 1557 | |
c96a8570 BS |
1558 | local_got_offsets[r_symndx] |= 1; |
1559 | } | |
1560 | } | |
48d502e1 | 1561 | |
c96a8570 BS |
1562 | relocation = sgot->output_offset + off; |
1563 | rel->r_addend = 0; | |
1564 | /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ | |
1565 | relocation /= 4; | |
1566 | } | |
1567 | goto do_default; | |
1568 | ||
1569 | default: | |
1570 | do_default: | |
1571 | r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, | |
1572 | contents, address, | |
1573 | relocation, rel->r_addend); | |
1574 | ||
1575 | break; | |
48d502e1 BS |
1576 | } |
1577 | ||
c96a8570 BS |
1578 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
1579 | because such sections are not SEC_ALLOC and thus ld.so will | |
1580 | not process them. */ | |
1581 | if (unresolved_reloc | |
1582 | && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)) | |
48d502e1 | 1583 | { |
c96a8570 BS |
1584 | (*_bfd_error_handler) |
1585 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), | |
1586 | input_bfd, | |
1587 | input_section, (long) rel->r_offset, h->root.root.string); | |
1588 | return FALSE; | |
48d502e1 | 1589 | } |
48d502e1 | 1590 | |
c96a8570 | 1591 | if (r != bfd_reloc_ok) |
48d502e1 | 1592 | { |
c96a8570 BS |
1593 | const char *name; |
1594 | ||
1595 | if (h != NULL) | |
1596 | name = h->root.root.string; | |
1597 | else | |
48d502e1 | 1598 | { |
c96a8570 BS |
1599 | name = bfd_elf_string_from_elf_section (input_bfd, |
1600 | symtab_hdr->sh_link, | |
1601 | sym->st_name); | |
1602 | if (name == NULL) | |
1603 | return FALSE; | |
1604 | if (*name == '\0') | |
1605 | name = bfd_section_name (input_bfd, sec); | |
48d502e1 | 1606 | } |
c96a8570 BS |
1607 | |
1608 | if (r == bfd_reloc_overflow) | |
48d502e1 | 1609 | { |
c96a8570 BS |
1610 | if (!(info->callbacks->reloc_overflow |
1611 | (info, (h ? &h->root : NULL), name, howto->name, | |
1612 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) | |
48d502e1 BS |
1613 | return FALSE; |
1614 | } | |
1615 | else | |
1616 | { | |
c96a8570 BS |
1617 | (*_bfd_error_handler) |
1618 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), | |
1619 | input_bfd, input_section, | |
1620 | (long) rel->r_offset, name, (int) r); | |
1621 | return FALSE; | |
48d502e1 | 1622 | } |
48d502e1 | 1623 | } |
48d502e1 BS |
1624 | } |
1625 | ||
c96a8570 BS |
1626 | return TRUE; |
1627 | } | |
48d502e1 | 1628 | |
c96a8570 BS |
1629 | static asection * |
1630 | bfin_gc_mark_hook (asection * sec, | |
1631 | struct bfd_link_info *info, | |
1632 | Elf_Internal_Rela * rel, | |
1633 | struct elf_link_hash_entry *h, | |
1634 | Elf_Internal_Sym * sym) | |
1635 | { | |
1636 | if (h != NULL) | |
1637 | switch (ELF32_R_TYPE (rel->r_info)) | |
1638 | { | |
1639 | case R_BFIN_GNU_VTINHERIT: | |
1640 | case R_BFIN_GNU_VTENTRY: | |
1641 | return NULL; | |
1642 | } | |
48d502e1 | 1643 | |
c96a8570 BS |
1644 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
1645 | } | |
48d502e1 | 1646 | |
c96a8570 | 1647 | /* Update the got entry reference counts for the section being removed. */ |
48d502e1 | 1648 | |
c96a8570 BS |
1649 | static bfd_boolean |
1650 | bfin_gc_sweep_hook (bfd * abfd, | |
1651 | struct bfd_link_info *info, | |
1652 | asection * sec, | |
1653 | const Elf_Internal_Rela * relocs) | |
1654 | { | |
1655 | Elf_Internal_Shdr *symtab_hdr; | |
1656 | struct elf_link_hash_entry **sym_hashes; | |
1657 | bfd_signed_vma *local_got_refcounts; | |
1658 | const Elf_Internal_Rela *rel, *relend; | |
1659 | bfd *dynobj; | |
1660 | asection *sgot; | |
1661 | asection *srelgot; | |
48d502e1 | 1662 | |
c96a8570 BS |
1663 | dynobj = elf_hash_table (info)->dynobj; |
1664 | if (dynobj == NULL) | |
0f64bb02 CM |
1665 | return TRUE; |
1666 | ||
0f64bb02 CM |
1667 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1668 | sym_hashes = elf_sym_hashes (abfd); | |
1669 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1670 | ||
c96a8570 BS |
1671 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
1672 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
0f64bb02 | 1673 | |
c96a8570 BS |
1674 | relend = relocs + sec->reloc_count; |
1675 | for (rel = relocs; rel < relend; rel++) | |
0f64bb02 CM |
1676 | { |
1677 | unsigned long r_symndx; | |
1678 | struct elf_link_hash_entry *h; | |
1679 | ||
0f64bb02 CM |
1680 | switch (ELF32_R_TYPE (rel->r_info)) |
1681 | { | |
0f64bb02 | 1682 | case R_got: |
c96a8570 BS |
1683 | r_symndx = ELF32_R_SYM (rel->r_info); |
1684 | if (r_symndx >= symtab_hdr->sh_info) | |
0f64bb02 | 1685 | { |
c96a8570 BS |
1686 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1687 | if (h->got.refcount > 0) | |
0f64bb02 | 1688 | { |
c96a8570 BS |
1689 | --h->got.refcount; |
1690 | if (h->got.refcount == 0) | |
0f64bb02 | 1691 | { |
c96a8570 BS |
1692 | /* We don't need the .got entry any more. */ |
1693 | sgot->size -= 4; | |
1694 | srelgot->size -= sizeof (Elf32_External_Rela); | |
0f64bb02 | 1695 | } |
0f64bb02 | 1696 | } |
0f64bb02 | 1697 | } |
c96a8570 | 1698 | else if (local_got_refcounts != NULL) |
0f64bb02 | 1699 | { |
c96a8570 | 1700 | if (local_got_refcounts[r_symndx] > 0) |
0f64bb02 | 1701 | { |
c96a8570 BS |
1702 | --local_got_refcounts[r_symndx]; |
1703 | if (local_got_refcounts[r_symndx] == 0) | |
0f64bb02 | 1704 | { |
c96a8570 BS |
1705 | /* We don't need the .got entry any more. */ |
1706 | sgot->size -= 4; | |
1707 | if (info->shared) | |
1708 | srelgot->size -= sizeof (Elf32_External_Rela); | |
0f64bb02 CM |
1709 | } |
1710 | } | |
0f64bb02 CM |
1711 | } |
1712 | break; | |
0f64bb02 CM |
1713 | default: |
1714 | break; | |
1715 | } | |
1716 | } | |
0f64bb02 CM |
1717 | return TRUE; |
1718 | } | |
c96a8570 BS |
1719 | \f |
1720 | extern const bfd_target bfd_elf32_bfinfdpic_vec; | |
1721 | #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec) | |
0f64bb02 | 1722 | |
c96a8570 BS |
1723 | /* An extension of the elf hash table data structure, containing some |
1724 | additional Blackfin-specific data. */ | |
1725 | struct bfinfdpic_elf_link_hash_table | |
c35e54f4 | 1726 | { |
c96a8570 | 1727 | struct elf_link_hash_table elf; |
c35e54f4 | 1728 | |
c96a8570 BS |
1729 | /* A pointer to the .got section. */ |
1730 | asection *sgot; | |
1731 | /* A pointer to the .rel.got section. */ | |
1732 | asection *sgotrel; | |
1733 | /* A pointer to the .rofixup section. */ | |
1734 | asection *sgotfixup; | |
1735 | /* A pointer to the .plt section. */ | |
1736 | asection *splt; | |
1737 | /* A pointer to the .rel.plt section. */ | |
1738 | asection *spltrel; | |
1739 | /* GOT base offset. */ | |
1740 | bfd_vma got0; | |
1741 | /* Location of the first non-lazy PLT entry, i.e., the number of | |
1742 | bytes taken by lazy PLT entries. */ | |
1743 | bfd_vma plt0; | |
1744 | /* A hash table holding information about which symbols were | |
1745 | referenced with which PIC-related relocations. */ | |
1746 | struct htab *relocs_info; | |
1747 | }; | |
c35e54f4 | 1748 | |
c96a8570 | 1749 | /* Get the Blackfin ELF linker hash table from a link_info structure. */ |
c35e54f4 | 1750 | |
c96a8570 BS |
1751 | #define bfinfdpic_hash_table(info) \ |
1752 | ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) | |
c35e54f4 | 1753 | |
c96a8570 BS |
1754 | #define bfinfdpic_got_section(info) \ |
1755 | (bfinfdpic_hash_table (info)->sgot) | |
1756 | #define bfinfdpic_gotrel_section(info) \ | |
1757 | (bfinfdpic_hash_table (info)->sgotrel) | |
1758 | #define bfinfdpic_gotfixup_section(info) \ | |
1759 | (bfinfdpic_hash_table (info)->sgotfixup) | |
1760 | #define bfinfdpic_plt_section(info) \ | |
1761 | (bfinfdpic_hash_table (info)->splt) | |
1762 | #define bfinfdpic_pltrel_section(info) \ | |
1763 | (bfinfdpic_hash_table (info)->spltrel) | |
1764 | #define bfinfdpic_relocs_info(info) \ | |
1765 | (bfinfdpic_hash_table (info)->relocs_info) | |
1766 | #define bfinfdpic_got_initial_offset(info) \ | |
1767 | (bfinfdpic_hash_table (info)->got0) | |
1768 | #define bfinfdpic_plt_initial_offset(info) \ | |
1769 | (bfinfdpic_hash_table (info)->plt0) | |
c35e54f4 | 1770 | |
c96a8570 BS |
1771 | /* The name of the dynamic interpreter. This is put in the .interp |
1772 | section. */ | |
c35e54f4 | 1773 | |
c96a8570 | 1774 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
c35e54f4 | 1775 | |
c96a8570 | 1776 | #define DEFAULT_STACK_SIZE 0x20000 |
c35e54f4 | 1777 | |
c96a8570 BS |
1778 | /* This structure is used to collect the number of entries present in |
1779 | each addressable range of the got. */ | |
1780 | struct _bfinfdpic_dynamic_got_info | |
1781 | { | |
1782 | /* Several bits of information about the current link. */ | |
1783 | struct bfd_link_info *info; | |
1784 | /* Total size needed for GOT entries within the 18- or 32-bit | |
1785 | ranges. */ | |
1786 | bfd_vma got17m4, gothilo; | |
1787 | /* Total size needed for function descriptor entries within the 18- | |
1788 | or 32-bit ranges. */ | |
1789 | bfd_vma fd17m4, fdhilo; | |
1790 | /* Total size needed function descriptor entries referenced in PLT | |
1791 | entries, that would be profitable to place in offsets close to | |
1792 | the PIC register. */ | |
1793 | bfd_vma fdplt; | |
1794 | /* Total size needed by lazy PLT entries. */ | |
1795 | bfd_vma lzplt; | |
1796 | /* Number of relocations carried over from input object files. */ | |
1797 | unsigned long relocs; | |
1798 | /* Number of fixups introduced by relocations in input object files. */ | |
1799 | unsigned long fixups; | |
1800 | }; | |
c35e54f4 | 1801 | |
c96a8570 | 1802 | /* Create a Blackfin ELF linker hash table. */ |
c35e54f4 | 1803 | |
c96a8570 BS |
1804 | static struct bfd_link_hash_table * |
1805 | bfinfdpic_elf_link_hash_table_create (bfd *abfd) | |
1806 | { | |
1807 | struct bfinfdpic_elf_link_hash_table *ret; | |
1808 | bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table); | |
c35e54f4 | 1809 | |
c96a8570 BS |
1810 | ret = bfd_zalloc (abfd, amt); |
1811 | if (ret == NULL) | |
1812 | return NULL; | |
c35e54f4 | 1813 | |
c96a8570 BS |
1814 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1815 | _bfd_elf_link_hash_newfunc, | |
1816 | sizeof (struct elf_link_hash_entry))) | |
1817 | { | |
1818 | free (ret); | |
1819 | return NULL; | |
1820 | } | |
c35e54f4 | 1821 | |
c96a8570 BS |
1822 | return &ret->elf.root; |
1823 | } | |
48d502e1 | 1824 | |
c96a8570 BS |
1825 | /* Decide whether a reference to a symbol can be resolved locally or |
1826 | not. If the symbol is protected, we want the local address, but | |
1827 | its function descriptor must be assigned by the dynamic linker. */ | |
1828 | #define BFINFDPIC_SYM_LOCAL(INFO, H) \ | |
1829 | (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \ | |
1830 | || ! elf_hash_table (INFO)->dynamic_sections_created) | |
1831 | #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \ | |
1832 | ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created) | |
48d502e1 | 1833 | |
c96a8570 BS |
1834 | /* This structure collects information on what kind of GOT, PLT or |
1835 | function descriptors are required by relocations that reference a | |
1836 | certain symbol. */ | |
1837 | struct bfinfdpic_relocs_info | |
1838 | { | |
1839 | /* The index of the symbol, as stored in the relocation r_info, if | |
1840 | we have a local symbol; -1 otherwise. */ | |
1841 | long symndx; | |
1842 | union | |
1843 | { | |
1844 | /* The input bfd in which the symbol is defined, if it's a local | |
1845 | symbol. */ | |
1846 | bfd *abfd; | |
1847 | /* If symndx == -1, the hash table entry corresponding to a global | |
1848 | symbol (even if it turns out to bind locally, in which case it | |
1849 | should ideally be replaced with section's symndx + addend). */ | |
1850 | struct elf_link_hash_entry *h; | |
1851 | } d; | |
1852 | /* The addend of the relocation that references the symbol. */ | |
1853 | bfd_vma addend; | |
48d502e1 | 1854 | |
c96a8570 BS |
1855 | /* The fields above are used to identify an entry. The fields below |
1856 | contain information on how an entry is used and, later on, which | |
1857 | locations it was assigned. */ | |
1858 | /* The following 2 fields record whether the symbol+addend above was | |
1859 | ever referenced with a GOT relocation. The 17M4 suffix indicates a | |
1860 | GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */ | |
1861 | unsigned got17m4; | |
1862 | unsigned gothilo; | |
1863 | /* Whether a FUNCDESC relocation references symbol+addend. */ | |
1864 | unsigned fd; | |
1865 | /* Whether a FUNCDESC_GOT relocation references symbol+addend. */ | |
1866 | unsigned fdgot17m4; | |
1867 | unsigned fdgothilo; | |
1868 | /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */ | |
1869 | unsigned fdgoff17m4; | |
1870 | unsigned fdgoffhilo; | |
1871 | /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or | |
1872 | GOTOFFHI relocations. The addend doesn't really matter, since we | |
1873 | envision that this will only be used to check whether the symbol | |
1874 | is mapped to the same segment as the got. */ | |
1875 | unsigned gotoff; | |
1876 | /* Whether symbol+addend is referenced by a LABEL24 relocation. */ | |
1877 | unsigned call; | |
1878 | /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE | |
1879 | relocation. */ | |
1880 | unsigned sym; | |
1881 | /* Whether we need a PLT entry for a symbol. Should be implied by | |
1882 | something like: | |
1883 | (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */ | |
1884 | unsigned plt:1; | |
1885 | /* Whether a function descriptor should be created in this link unit | |
1886 | for symbol+addend. Should be implied by something like: | |
1887 | (plt || fdgotoff17m4 || fdgotofflohi | |
1888 | || ((fd || fdgot17m4 || fdgothilo) | |
1889 | && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */ | |
1890 | unsigned privfd:1; | |
1891 | /* Whether a lazy PLT entry is needed for this symbol+addend. | |
1892 | Should be implied by something like: | |
1893 | (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h) | |
1894 | && ! (info->flags & DF_BIND_NOW)) */ | |
1895 | unsigned lazyplt:1; | |
1896 | /* Whether we've already emitted GOT relocations and PLT entries as | |
1897 | needed for this symbol. */ | |
1898 | unsigned done:1; | |
48d502e1 | 1899 | |
c96a8570 BS |
1900 | /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE |
1901 | relocations referencing the symbol. */ | |
1902 | unsigned relocs32, relocsfd, relocsfdv; | |
48d502e1 | 1903 | |
c96a8570 BS |
1904 | /* The number of .rofixups entries and dynamic relocations allocated |
1905 | for this symbol, minus any that might have already been used. */ | |
1906 | unsigned fixups, dynrelocs; | |
48d502e1 | 1907 | |
c96a8570 BS |
1908 | /* The offsets of the GOT entries assigned to symbol+addend, to the |
1909 | function descriptor's address, and to a function descriptor, | |
1910 | respectively. Should be zero if unassigned. The offsets are | |
1911 | counted from the value that will be assigned to the PIC register, | |
1912 | not from the beginning of the .got section. */ | |
1913 | bfd_signed_vma got_entry, fdgot_entry, fd_entry; | |
1914 | /* The offsets of the PLT entries assigned to symbol+addend, | |
1915 | non-lazy and lazy, respectively. If unassigned, should be | |
1916 | (bfd_vma)-1. */ | |
1917 | bfd_vma plt_entry, lzplt_entry; | |
1918 | }; | |
48d502e1 | 1919 | |
c96a8570 BS |
1920 | /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */ |
1921 | static hashval_t | |
1922 | bfinfdpic_relocs_info_hash (const void *entry_) | |
1923 | { | |
1924 | const struct bfinfdpic_relocs_info *entry = entry_; | |
48d502e1 | 1925 | |
c96a8570 BS |
1926 | return (entry->symndx == -1 |
1927 | ? (long) entry->d.h->root.root.hash | |
1928 | : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend; | |
1929 | } | |
f4707595 | 1930 | |
c96a8570 BS |
1931 | /* Test whether the key fields of two bfinfdpic_relocs_info entries are |
1932 | identical. */ | |
1933 | static int | |
1934 | bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2) | |
0f64bb02 | 1935 | { |
c96a8570 BS |
1936 | const struct bfinfdpic_relocs_info *e1 = entry1; |
1937 | const struct bfinfdpic_relocs_info *e2 = entry2; | |
0f64bb02 | 1938 | |
c96a8570 BS |
1939 | return e1->symndx == e2->symndx && e1->addend == e2->addend |
1940 | && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd); | |
1941 | } | |
48d502e1 | 1942 | |
c96a8570 BS |
1943 | /* Find or create an entry in a hash table HT that matches the key |
1944 | fields of the given ENTRY. If it's not found, memory for a new | |
1945 | entry is allocated in ABFD's obstack. */ | |
1946 | static struct bfinfdpic_relocs_info * | |
1947 | bfinfdpic_relocs_info_find (struct htab *ht, | |
1948 | bfd *abfd, | |
1949 | const struct bfinfdpic_relocs_info *entry, | |
1950 | enum insert_option insert) | |
1951 | { | |
1952 | struct bfinfdpic_relocs_info **loc = | |
1953 | (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert); | |
0f64bb02 | 1954 | |
c96a8570 BS |
1955 | if (! loc) |
1956 | return NULL; | |
0f64bb02 | 1957 | |
c96a8570 BS |
1958 | if (*loc) |
1959 | return *loc; | |
0f64bb02 | 1960 | |
c96a8570 | 1961 | *loc = bfd_zalloc (abfd, sizeof (**loc)); |
0f64bb02 | 1962 | |
c96a8570 BS |
1963 | if (! *loc) |
1964 | return *loc; | |
0f64bb02 | 1965 | |
c96a8570 BS |
1966 | (*loc)->symndx = entry->symndx; |
1967 | (*loc)->d = entry->d; | |
1968 | (*loc)->addend = entry->addend; | |
1969 | (*loc)->plt_entry = (bfd_vma)-1; | |
1970 | (*loc)->lzplt_entry = (bfd_vma)-1; | |
0f64bb02 | 1971 | |
c96a8570 BS |
1972 | return *loc; |
1973 | } | |
48d502e1 | 1974 | |
c96a8570 BS |
1975 | /* Obtain the address of the entry in HT associated with H's symbol + |
1976 | addend, creating a new entry if none existed. ABFD is only used | |
1977 | for memory allocation purposes. */ | |
1978 | inline static struct bfinfdpic_relocs_info * | |
1979 | bfinfdpic_relocs_info_for_global (struct htab *ht, | |
1980 | bfd *abfd, | |
1981 | struct elf_link_hash_entry *h, | |
1982 | bfd_vma addend, | |
1983 | enum insert_option insert) | |
1984 | { | |
1985 | struct bfinfdpic_relocs_info entry; | |
0f64bb02 | 1986 | |
c96a8570 BS |
1987 | entry.symndx = -1; |
1988 | entry.d.h = h; | |
1989 | entry.addend = addend; | |
f4707595 | 1990 | |
c96a8570 BS |
1991 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
1992 | } | |
48d502e1 | 1993 | |
c96a8570 BS |
1994 | /* Obtain the address of the entry in HT associated with the SYMNDXth |
1995 | local symbol of the input bfd ABFD, plus the addend, creating a new | |
1996 | entry if none existed. */ | |
1997 | inline static struct bfinfdpic_relocs_info * | |
1998 | bfinfdpic_relocs_info_for_local (struct htab *ht, | |
1999 | bfd *abfd, | |
2000 | long symndx, | |
2001 | bfd_vma addend, | |
2002 | enum insert_option insert) | |
2003 | { | |
2004 | struct bfinfdpic_relocs_info entry; | |
ab96bf03 | 2005 | |
c96a8570 BS |
2006 | entry.symndx = symndx; |
2007 | entry.d.abfd = abfd; | |
2008 | entry.addend = addend; | |
48d502e1 | 2009 | |
c96a8570 BS |
2010 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
2011 | } | |
48d502e1 | 2012 | |
c96a8570 BS |
2013 | /* Merge fields set by check_relocs() of two entries that end up being |
2014 | mapped to the same (presumably global) symbol. */ | |
0f64bb02 | 2015 | |
c96a8570 BS |
2016 | inline static void |
2017 | bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2, | |
2018 | struct bfinfdpic_relocs_info const *e1) | |
2019 | { | |
2020 | e2->got17m4 |= e1->got17m4; | |
2021 | e2->gothilo |= e1->gothilo; | |
2022 | e2->fd |= e1->fd; | |
2023 | e2->fdgot17m4 |= e1->fdgot17m4; | |
2024 | e2->fdgothilo |= e1->fdgothilo; | |
2025 | e2->fdgoff17m4 |= e1->fdgoff17m4; | |
2026 | e2->fdgoffhilo |= e1->fdgoffhilo; | |
2027 | e2->gotoff |= e1->gotoff; | |
2028 | e2->call |= e1->call; | |
2029 | e2->sym |= e1->sym; | |
2030 | } | |
48d502e1 | 2031 | |
c96a8570 BS |
2032 | /* Every block of 65535 lazy PLT entries shares a single call to the |
2033 | resolver, inserted in the 32768th lazy PLT entry (i.e., entry # | |
2034 | 32767, counting from 0). All other lazy PLT entries branch to it | |
2035 | in a single instruction. */ | |
48d502e1 | 2036 | |
c96a8570 BS |
2037 | #define LZPLT_RESOLVER_EXTRA 10 |
2038 | #define LZPLT_NORMAL_SIZE 6 | |
2039 | #define LZPLT_ENTRIES 1362 | |
48d502e1 | 2040 | |
c96a8570 BS |
2041 | #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA) |
2042 | #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2) | |
48d502e1 | 2043 | |
c96a8570 | 2044 | /* Add a dynamic relocation to the SRELOC section. */ |
48d502e1 | 2045 | |
c96a8570 BS |
2046 | inline static bfd_vma |
2047 | _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset, | |
2048 | int reloc_type, long dynindx, bfd_vma addend, | |
2049 | struct bfinfdpic_relocs_info *entry) | |
2050 | { | |
2051 | Elf_Internal_Rela outrel; | |
2052 | bfd_vma reloc_offset; | |
0f64bb02 | 2053 | |
c96a8570 BS |
2054 | outrel.r_offset = offset; |
2055 | outrel.r_info = ELF32_R_INFO (dynindx, reloc_type); | |
2056 | outrel.r_addend = addend; | |
48d502e1 | 2057 | |
c96a8570 BS |
2058 | reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel); |
2059 | BFD_ASSERT (reloc_offset < sreloc->size); | |
2060 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
2061 | sreloc->contents + reloc_offset); | |
2062 | sreloc->reloc_count++; | |
48d502e1 | 2063 | |
c96a8570 BS |
2064 | /* If the entry's index is zero, this relocation was probably to a |
2065 | linkonce section that got discarded. We reserved a dynamic | |
2066 | relocation, but it was for another entry than the one we got at | |
2067 | the time of emitting the relocation. Unfortunately there's no | |
2068 | simple way for us to catch this situation, since the relocation | |
2069 | is cleared right before calling relocate_section, at which point | |
2070 | we no longer know what the relocation used to point to. */ | |
2071 | if (entry->symndx) | |
2072 | { | |
2073 | BFD_ASSERT (entry->dynrelocs > 0); | |
2074 | entry->dynrelocs--; | |
2075 | } | |
48d502e1 | 2076 | |
c96a8570 BS |
2077 | return reloc_offset; |
2078 | } | |
0f64bb02 | 2079 | |
c96a8570 | 2080 | /* Add a fixup to the ROFIXUP section. */ |
48d502e1 | 2081 | |
c96a8570 BS |
2082 | static bfd_vma |
2083 | _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset, | |
2084 | struct bfinfdpic_relocs_info *entry) | |
2085 | { | |
2086 | bfd_vma fixup_offset; | |
8aafe8b4 | 2087 | |
c96a8570 BS |
2088 | if (rofixup->flags & SEC_EXCLUDE) |
2089 | return -1; | |
0f64bb02 | 2090 | |
c96a8570 BS |
2091 | fixup_offset = rofixup->reloc_count * 4; |
2092 | if (rofixup->contents) | |
2093 | { | |
2094 | BFD_ASSERT (fixup_offset < rofixup->size); | |
2095 | bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset); | |
2096 | } | |
2097 | rofixup->reloc_count++; | |
0f64bb02 | 2098 | |
c96a8570 BS |
2099 | if (entry && entry->symndx) |
2100 | { | |
2101 | /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc | |
2102 | above. */ | |
2103 | BFD_ASSERT (entry->fixups > 0); | |
2104 | entry->fixups--; | |
2105 | } | |
f4707595 | 2106 | |
c96a8570 BS |
2107 | return fixup_offset; |
2108 | } | |
0f64bb02 | 2109 | |
c96a8570 BS |
2110 | /* Find the segment number in which OSEC, and output section, is |
2111 | located. */ | |
ca889129 | 2112 | |
c96a8570 BS |
2113 | static unsigned |
2114 | _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec) | |
2115 | { | |
2116 | Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec); | |
0f64bb02 | 2117 | |
c96a8570 BS |
2118 | return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1; |
2119 | } | |
2120 | ||
2121 | inline static bfd_boolean | |
2122 | _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec) | |
2123 | { | |
2124 | unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec); | |
2125 | ||
2126 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); | |
2127 | } | |
2128 | ||
2129 | /* Generate relocations for GOT entries, function descriptors, and | |
2130 | code for PLT and lazy PLT entries. */ | |
2131 | ||
2132 | inline static bfd_boolean | |
2133 | _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry, | |
2134 | bfd *output_bfd, | |
2135 | struct bfd_link_info *info, | |
2136 | asection *sec, | |
2137 | Elf_Internal_Sym *sym, | |
2138 | bfd_vma addend) | |
2139 | ||
2140 | { | |
2141 | bfd_vma fd_lazy_rel_offset = (bfd_vma)-1; | |
2142 | int dynindx = -1; | |
2143 | ||
2144 | if (entry->done) | |
2145 | return TRUE; | |
2146 | entry->done = 1; | |
2147 | ||
2148 | if (entry->got_entry || entry->fdgot_entry || entry->fd_entry) | |
2149 | { | |
2150 | /* If the symbol is dynamic, consider it for dynamic | |
2151 | relocations, otherwise decay to section + offset. */ | |
2152 | if (entry->symndx == -1 && entry->d.h->dynindx != -1) | |
2153 | dynindx = entry->d.h->dynindx; | |
2154 | else | |
2155 | { | |
2156 | if (sec->output_section | |
2157 | && ! bfd_is_abs_section (sec->output_section) | |
2158 | && ! bfd_is_und_section (sec->output_section)) | |
2159 | dynindx = elf_section_data (sec->output_section)->dynindx; | |
2160 | else | |
2161 | dynindx = 0; | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | /* Generate relocation for GOT entry pointing to the symbol. */ | |
2166 | if (entry->got_entry) | |
2167 | { | |
2168 | int idx = dynindx; | |
2169 | bfd_vma ad = addend; | |
2170 | ||
2171 | /* If the symbol is dynamic but binds locally, use | |
2172 | section+offset. */ | |
2173 | if (sec && (entry->symndx != -1 | |
2174 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2175 | { | |
2176 | if (entry->symndx == -1) | |
2177 | ad += entry->d.h->root.u.def.value; | |
2178 | else | |
2179 | ad += sym->st_value; | |
2180 | ad += sec->output_offset; | |
2181 | if (sec->output_section && elf_section_data (sec->output_section)) | |
2182 | idx = elf_section_data (sec->output_section)->dynindx; | |
2183 | else | |
2184 | idx = 0; | |
2185 | } | |
2186 | ||
2187 | /* If we're linking an executable at a fixed address, we can | |
2188 | omit the dynamic relocation as long as the symbol is local to | |
2189 | this module. */ | |
2190 | if (info->executable && !info->pie | |
2191 | && (entry->symndx != -1 | |
2192 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2193 | { | |
2194 | if (sec) | |
2195 | ad += sec->output_section->vma; | |
2196 | if (entry->symndx != -1 | |
2197 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
2198 | _bfinfdpic_add_rofixup (output_bfd, | |
2199 | bfinfdpic_gotfixup_section (info), | |
2200 | bfinfdpic_got_section (info)->output_section | |
2201 | ->vma | |
2202 | + bfinfdpic_got_section (info)->output_offset | |
2203 | + bfinfdpic_got_initial_offset (info) | |
2204 | + entry->got_entry, entry); | |
2205 | } | |
2206 | else | |
2207 | _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info), | |
2208 | _bfd_elf_section_offset | |
2209 | (output_bfd, info, | |
2210 | bfinfdpic_got_section (info), | |
2211 | bfinfdpic_got_initial_offset (info) | |
2212 | + entry->got_entry) | |
2213 | + bfinfdpic_got_section (info) | |
2214 | ->output_section->vma | |
2215 | + bfinfdpic_got_section (info)->output_offset, | |
2216 | R_byte4_data, idx, ad, entry); | |
2217 | ||
2218 | bfd_put_32 (output_bfd, ad, | |
2219 | bfinfdpic_got_section (info)->contents | |
2220 | + bfinfdpic_got_initial_offset (info) | |
2221 | + entry->got_entry); | |
2222 | } | |
2223 | ||
2224 | /* Generate relocation for GOT entry pointing to a canonical | |
2225 | function descriptor. */ | |
2226 | if (entry->fdgot_entry) | |
2227 | { | |
2228 | int reloc, idx; | |
2229 | bfd_vma ad = 0; | |
2230 | ||
2231 | if (! (entry->symndx == -1 | |
2232 | && entry->d.h->root.type == bfd_link_hash_undefweak | |
2233 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2234 | { | |
2235 | /* If the symbol is dynamic and there may be dynamic symbol | |
2236 | resolution because we are, or are linked with, a shared | |
2237 | library, emit a FUNCDESC relocation such that the dynamic | |
2238 | linker will allocate the function descriptor. If the | |
2239 | symbol needs a non-local function descriptor but binds | |
2240 | locally (e.g., its visibility is protected, emit a | |
2241 | dynamic relocation decayed to section+offset. */ | |
2242 | if (entry->symndx == -1 | |
2243 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h) | |
2244 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h) | |
2245 | && !(info->executable && !info->pie)) | |
2246 | { | |
2247 | reloc = R_BFIN_FUNCDESC; | |
2248 | idx = elf_section_data (entry->d.h->root.u.def.section | |
2249 | ->output_section)->dynindx; | |
2250 | ad = entry->d.h->root.u.def.section->output_offset | |
2251 | + entry->d.h->root.u.def.value; | |
2252 | } | |
2253 | else if (entry->symndx == -1 | |
2254 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)) | |
2255 | { | |
2256 | reloc = R_BFIN_FUNCDESC; | |
2257 | idx = dynindx; | |
2258 | ad = addend; | |
2259 | if (ad) | |
2260 | return FALSE; | |
2261 | } | |
2262 | else | |
2263 | { | |
2264 | /* Otherwise, we know we have a private function descriptor, | |
2265 | so reference it directly. */ | |
2266 | if (elf_hash_table (info)->dynamic_sections_created) | |
2267 | BFD_ASSERT (entry->privfd); | |
2268 | reloc = R_byte4_data; | |
2269 | idx = elf_section_data (bfinfdpic_got_section (info) | |
2270 | ->output_section)->dynindx; | |
2271 | ad = bfinfdpic_got_section (info)->output_offset | |
2272 | + bfinfdpic_got_initial_offset (info) + entry->fd_entry; | |
2273 | } | |
2274 | ||
2275 | /* If there is room for dynamic symbol resolution, emit the | |
2276 | dynamic relocation. However, if we're linking an | |
2277 | executable at a fixed location, we won't have emitted a | |
2278 | dynamic symbol entry for the got section, so idx will be | |
2279 | zero, which means we can and should compute the address | |
2280 | of the private descriptor ourselves. */ | |
2281 | if (info->executable && !info->pie | |
2282 | && (entry->symndx != -1 | |
2283 | || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))) | |
2284 | { | |
2285 | ad += bfinfdpic_got_section (info)->output_section->vma; | |
2286 | _bfinfdpic_add_rofixup (output_bfd, | |
2287 | bfinfdpic_gotfixup_section (info), | |
2288 | bfinfdpic_got_section (info) | |
2289 | ->output_section->vma | |
2290 | + bfinfdpic_got_section (info) | |
2291 | ->output_offset | |
2292 | + bfinfdpic_got_initial_offset (info) | |
2293 | + entry->fdgot_entry, entry); | |
2294 | } | |
2295 | else | |
2296 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
2297 | bfinfdpic_gotrel_section (info), | |
2298 | _bfd_elf_section_offset | |
2299 | (output_bfd, info, | |
2300 | bfinfdpic_got_section (info), | |
2301 | bfinfdpic_got_initial_offset (info) | |
2302 | + entry->fdgot_entry) | |
2303 | + bfinfdpic_got_section (info) | |
2304 | ->output_section->vma | |
2305 | + bfinfdpic_got_section (info) | |
2306 | ->output_offset, | |
2307 | reloc, idx, ad, entry); | |
2308 | } | |
f4707595 | 2309 | |
c96a8570 BS |
2310 | bfd_put_32 (output_bfd, ad, |
2311 | bfinfdpic_got_section (info)->contents | |
2312 | + bfinfdpic_got_initial_offset (info) | |
2313 | + entry->fdgot_entry); | |
2314 | } | |
2315 | ||
2316 | /* Generate relocation to fill in a private function descriptor in | |
2317 | the GOT. */ | |
2318 | if (entry->fd_entry) | |
2319 | { | |
2320 | int idx = dynindx; | |
2321 | bfd_vma ad = addend; | |
2322 | bfd_vma ofst; | |
2323 | long lowword, highword; | |
2324 | ||
2325 | /* If the symbol is dynamic but binds locally, use | |
2326 | section+offset. */ | |
2327 | if (sec && (entry->symndx != -1 | |
2328 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
2329 | { | |
2330 | if (entry->symndx == -1) | |
2331 | ad += entry->d.h->root.u.def.value; | |
2332 | else | |
2333 | ad += sym->st_value; | |
2334 | ad += sec->output_offset; | |
2335 | if (sec->output_section && elf_section_data (sec->output_section)) | |
2336 | idx = elf_section_data (sec->output_section)->dynindx; | |
2337 | else | |
2338 | idx = 0; | |
48d502e1 | 2339 | } |
f4707595 | 2340 | |
c96a8570 BS |
2341 | /* If we're linking an executable at a fixed address, we can |
2342 | omit the dynamic relocation as long as the symbol is local to | |
2343 | this module. */ | |
2344 | if (info->executable && !info->pie | |
2345 | && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) | |
48d502e1 | 2346 | { |
c96a8570 BS |
2347 | if (sec) |
2348 | ad += sec->output_section->vma; | |
2349 | ofst = 0; | |
2350 | if (entry->symndx != -1 | |
2351 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
2352 | { | |
2353 | _bfinfdpic_add_rofixup (output_bfd, | |
2354 | bfinfdpic_gotfixup_section (info), | |
2355 | bfinfdpic_got_section (info) | |
2356 | ->output_section->vma | |
2357 | + bfinfdpic_got_section (info) | |
2358 | ->output_offset | |
2359 | + bfinfdpic_got_initial_offset (info) | |
2360 | + entry->fd_entry, entry); | |
2361 | _bfinfdpic_add_rofixup (output_bfd, | |
2362 | bfinfdpic_gotfixup_section (info), | |
2363 | bfinfdpic_got_section (info) | |
2364 | ->output_section->vma | |
2365 | + bfinfdpic_got_section (info) | |
2366 | ->output_offset | |
2367 | + bfinfdpic_got_initial_offset (info) | |
2368 | + entry->fd_entry + 4, entry); | |
2369 | } | |
2370 | } | |
2371 | else | |
2372 | { | |
2373 | ofst | |
2374 | = _bfinfdpic_add_dyn_reloc (output_bfd, | |
2375 | entry->lazyplt | |
2376 | ? bfinfdpic_pltrel_section (info) | |
2377 | : bfinfdpic_gotrel_section (info), | |
2378 | _bfd_elf_section_offset | |
2379 | (output_bfd, info, | |
2380 | bfinfdpic_got_section (info), | |
2381 | bfinfdpic_got_initial_offset (info) | |
2382 | + entry->fd_entry) | |
2383 | + bfinfdpic_got_section (info) | |
2384 | ->output_section->vma | |
2385 | + bfinfdpic_got_section (info) | |
2386 | ->output_offset, | |
2387 | R_BFIN_FUNCDESC_VALUE, idx, ad, entry); | |
48d502e1 | 2388 | } |
f4707595 | 2389 | |
c96a8570 BS |
2390 | /* If we've omitted the dynamic relocation, just emit the fixed |
2391 | addresses of the symbol and of the local GOT base offset. */ | |
2392 | if (info->executable && !info->pie && sec && sec->output_section) | |
48d502e1 | 2393 | { |
c96a8570 BS |
2394 | lowword = ad; |
2395 | highword = bfinfdpic_got_section (info)->output_section->vma | |
2396 | + bfinfdpic_got_section (info)->output_offset | |
2397 | + bfinfdpic_got_initial_offset (info); | |
2398 | } | |
2399 | else if (entry->lazyplt) | |
2400 | { | |
2401 | if (ad) | |
2402 | return FALSE; | |
f4707595 | 2403 | |
c96a8570 | 2404 | fd_lazy_rel_offset = ofst; |
f4707595 | 2405 | |
c96a8570 BS |
2406 | /* A function descriptor used for lazy or local resolving is |
2407 | initialized such that its high word contains the output | |
2408 | section index in which the PLT entries are located, and | |
2409 | the low word contains the address of the lazy PLT entry | |
2410 | entry point, that must be within the memory region | |
2411 | assigned to that section. */ | |
2412 | lowword = entry->lzplt_entry + 4 | |
2413 | + bfinfdpic_plt_section (info)->output_offset | |
2414 | + bfinfdpic_plt_section (info)->output_section->vma; | |
2415 | highword = _bfinfdpic_osec_to_segment | |
2416 | (output_bfd, bfinfdpic_plt_section (info)->output_section); | |
2417 | } | |
2418 | else | |
2419 | { | |
2420 | /* A function descriptor for a local function gets the index | |
2421 | of the section. For a non-local function, it's | |
2422 | disregarded. */ | |
2423 | lowword = ad; | |
2424 | if (entry->symndx == -1 && entry->d.h->dynindx != -1 | |
2425 | && entry->d.h->dynindx == idx) | |
2426 | highword = 0; | |
2427 | else | |
2428 | highword = _bfinfdpic_osec_to_segment | |
2429 | (output_bfd, sec->output_section); | |
48d502e1 | 2430 | } |
f4707595 | 2431 | |
c96a8570 BS |
2432 | bfd_put_32 (output_bfd, lowword, |
2433 | bfinfdpic_got_section (info)->contents | |
2434 | + bfinfdpic_got_initial_offset (info) | |
2435 | + entry->fd_entry); | |
2436 | bfd_put_32 (output_bfd, highword, | |
2437 | bfinfdpic_got_section (info)->contents | |
2438 | + bfinfdpic_got_initial_offset (info) | |
2439 | + entry->fd_entry + 4); | |
2440 | } | |
2441 | ||
2442 | /* Generate code for the PLT entry. */ | |
2443 | if (entry->plt_entry != (bfd_vma) -1) | |
2444 | { | |
2445 | bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents | |
2446 | + entry->plt_entry; | |
2447 | ||
2448 | BFD_ASSERT (entry->fd_entry); | |
2449 | ||
2450 | /* Figure out what kind of PLT entry we need, depending on the | |
2451 | location of the function descriptor within the GOT. */ | |
2452 | if (entry->fd_entry >= -(1 << (18 - 1)) | |
2453 | && entry->fd_entry + 4 < (1 << (18 - 1))) | |
48d502e1 | 2454 | { |
c96a8570 BS |
2455 | /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */ |
2456 | bfd_put_32 (output_bfd, | |
2457 | 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000), | |
2458 | plt_code); | |
2459 | bfd_put_32 (output_bfd, | |
2460 | 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000), | |
2461 | plt_code + 4); | |
2462 | plt_code += 8; | |
2463 | } | |
2464 | else | |
2465 | { | |
2466 | /* P1.L = fd_entry; P1.H = fd_entry; | |
2467 | P3 = P3 + P1; | |
2468 | P1 = [P3]; | |
2469 | P3 = [P3 + 4]; */ | |
2470 | bfd_put_32 (output_bfd, | |
2471 | 0xe109 | (entry->fd_entry << 16), | |
2472 | plt_code); | |
2473 | bfd_put_32 (output_bfd, | |
2474 | 0xe149 | (entry->fd_entry & 0xFFFF0000), | |
2475 | plt_code + 4); | |
2476 | bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8); | |
2477 | bfd_put_16 (output_bfd, 0x9159, plt_code + 10); | |
2478 | bfd_put_16 (output_bfd, 0xac5b, plt_code + 12); | |
2479 | plt_code += 14; | |
2480 | } | |
2481 | /* JUMP (P1) */ | |
2482 | bfd_put_16 (output_bfd, 0x0051, plt_code); | |
2483 | } | |
f4707595 | 2484 | |
c96a8570 BS |
2485 | /* Generate code for the lazy PLT entry. */ |
2486 | if (entry->lzplt_entry != (bfd_vma) -1) | |
2487 | { | |
2488 | bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents | |
2489 | + entry->lzplt_entry; | |
2490 | bfd_vma resolverStub_addr; | |
0f64bb02 | 2491 | |
c96a8570 BS |
2492 | bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code); |
2493 | lzplt_code += 4; | |
0f64bb02 | 2494 | |
c96a8570 BS |
2495 | resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE |
2496 | * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC; | |
2497 | if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info)) | |
2498 | resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA; | |
0f64bb02 | 2499 | |
c96a8570 | 2500 | if (entry->lzplt_entry == resolverStub_addr) |
0f64bb02 | 2501 | { |
c96a8570 BS |
2502 | /* This is a lazy PLT entry that includes a resolver call. |
2503 | P2 = [P3]; | |
2504 | R3 = [P3 + 4]; | |
2505 | JUMP (P2); */ | |
2506 | bfd_put_32 (output_bfd, | |
2507 | 0xa05b915a, | |
2508 | lzplt_code); | |
2509 | bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4); | |
2510 | } | |
2511 | else | |
2512 | { | |
2513 | /* JUMP.S resolverStub */ | |
2514 | bfd_put_16 (output_bfd, | |
2515 | 0x2000 | |
2516 | | (((resolverStub_addr - entry->lzplt_entry) | |
2517 | / 2) & (((bfd_vma)1 << 12) - 1)), | |
2518 | lzplt_code); | |
2519 | } | |
2520 | } | |
0f64bb02 | 2521 | |
c96a8570 BS |
2522 | return TRUE; |
2523 | } | |
2524 | \f | |
2525 | /* Relocate an Blackfin ELF section. | |
48d502e1 | 2526 | |
c96a8570 BS |
2527 | The RELOCATE_SECTION function is called by the new ELF backend linker |
2528 | to handle the relocations for a section. | |
48d502e1 | 2529 | |
c96a8570 BS |
2530 | The relocs are always passed as Rela structures; if the section |
2531 | actually uses Rel structures, the r_addend field will always be | |
2532 | zero. | |
48d502e1 | 2533 | |
c96a8570 BS |
2534 | This function is responsible for adjusting the section contents as |
2535 | necessary, and (if using Rela relocs and generating a relocatable | |
2536 | output file) adjusting the reloc addend as necessary. | |
48d502e1 | 2537 | |
c96a8570 BS |
2538 | This function does not have to worry about setting the reloc |
2539 | address or the reloc symbol index. | |
48d502e1 | 2540 | |
c96a8570 | 2541 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
48d502e1 | 2542 | |
c96a8570 BS |
2543 | LOCAL_SECTIONS is an array giving the section in the input file |
2544 | corresponding to the st_shndx field of each local symbol. | |
48d502e1 | 2545 | |
c96a8570 BS |
2546 | The global hash table entry for the global symbols can be found |
2547 | via elf_sym_hashes (input_bfd). | |
48d502e1 | 2548 | |
c96a8570 BS |
2549 | When generating relocatable output, this function must handle |
2550 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
2551 | going to be the section symbol corresponding to the output | |
2552 | section, which means that the addend must be adjusted | |
2553 | accordingly. */ | |
48d502e1 BS |
2554 | |
2555 | static bfd_boolean | |
c96a8570 BS |
2556 | bfinfdpic_relocate_section (bfd * output_bfd, |
2557 | struct bfd_link_info *info, | |
2558 | bfd * input_bfd, | |
2559 | asection * input_section, | |
2560 | bfd_byte * contents, | |
2561 | Elf_Internal_Rela * relocs, | |
2562 | Elf_Internal_Sym * local_syms, | |
2563 | asection ** local_sections) | |
48d502e1 | 2564 | { |
48d502e1 BS |
2565 | Elf_Internal_Shdr *symtab_hdr; |
2566 | struct elf_link_hash_entry **sym_hashes; | |
48d502e1 BS |
2567 | Elf_Internal_Rela *rel; |
2568 | Elf_Internal_Rela *relend; | |
c96a8570 BS |
2569 | unsigned isec_segment, got_segment, plt_segment, |
2570 | check_segment[2]; | |
2571 | int silence_segment_error = !(info->shared || info->pie); | |
48d502e1 | 2572 | |
c96a8570 | 2573 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
48d502e1 | 2574 | sym_hashes = elf_sym_hashes (input_bfd); |
c96a8570 | 2575 | relend = relocs + input_section->reloc_count; |
48d502e1 | 2576 | |
c96a8570 BS |
2577 | isec_segment = _bfinfdpic_osec_to_segment (output_bfd, |
2578 | input_section->output_section); | |
2579 | if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info)) | |
2580 | got_segment = _bfinfdpic_osec_to_segment (output_bfd, | |
2581 | bfinfdpic_got_section (info) | |
2582 | ->output_section); | |
2583 | else | |
2584 | got_segment = -1; | |
2585 | if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created) | |
2586 | plt_segment = _bfinfdpic_osec_to_segment (output_bfd, | |
2587 | bfinfdpic_plt_section (info) | |
2588 | ->output_section); | |
2589 | else | |
2590 | plt_segment = -1; | |
48d502e1 | 2591 | |
c96a8570 | 2592 | for (rel = relocs; rel < relend; rel ++) |
48d502e1 | 2593 | { |
48d502e1 BS |
2594 | reloc_howto_type *howto; |
2595 | unsigned long r_symndx; | |
48d502e1 BS |
2596 | Elf_Internal_Sym *sym; |
2597 | asection *sec; | |
c96a8570 BS |
2598 | struct elf_link_hash_entry *h; |
2599 | bfd_vma relocation; | |
48d502e1 | 2600 | bfd_reloc_status_type r; |
c96a8570 BS |
2601 | const char * name = NULL; |
2602 | int r_type; | |
2603 | asection *osec; | |
2604 | struct bfinfdpic_relocs_info *picrel; | |
2605 | bfd_vma orig_addend = rel->r_addend; | |
48d502e1 BS |
2606 | |
2607 | r_type = ELF32_R_TYPE (rel->r_info); | |
48d502e1 | 2608 | |
c96a8570 BS |
2609 | if (r_type == R_BFIN_GNU_VTINHERIT |
2610 | || r_type == R_BFIN_GNU_VTENTRY) | |
48d502e1 BS |
2611 | continue; |
2612 | ||
c96a8570 | 2613 | r_symndx = ELF32_R_SYM (rel->r_info); |
48d502e1 BS |
2614 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
2615 | if (howto == NULL) | |
2616 | { | |
2617 | bfd_set_error (bfd_error_bad_value); | |
2618 | return FALSE; | |
2619 | } | |
48d502e1 | 2620 | |
c96a8570 BS |
2621 | h = NULL; |
2622 | sym = NULL; | |
2623 | sec = NULL; | |
2624 | ||
2625 | if (r_symndx < symtab_hdr->sh_info) | |
2626 | { | |
2627 | sym = local_syms + r_symndx; | |
2628 | osec = sec = local_sections [r_symndx]; | |
2629 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2630 | ||
2631 | name = bfd_elf_string_from_elf_section | |
2632 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
2633 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
2634 | } | |
2635 | else | |
2636 | { | |
2637 | bfd_boolean warned; | |
2638 | bfd_boolean unresolved_reloc; | |
2639 | ||
2640 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2641 | r_symndx, symtab_hdr, sym_hashes, | |
2642 | h, sec, relocation, | |
2643 | unresolved_reloc, warned); | |
2644 | osec = sec; | |
2645 | } | |
2646 | ||
2647 | if (sec != NULL && elf_discarded_section (sec)) | |
2648 | { | |
2649 | /* For relocs against symbols from removed linkonce sections, | |
2650 | or sections discarded by a linker script, we just want the | |
2651 | section contents zeroed. Avoid any special processing. */ | |
2652 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2653 | rel->r_info = 0; | |
2654 | rel->r_addend = 0; | |
2655 | continue; | |
2656 | } | |
2657 | ||
2658 | if (info->relocatable) | |
2659 | continue; | |
2660 | ||
2661 | if (h != NULL | |
2662 | && (h->root.type == bfd_link_hash_defined | |
2663 | || h->root.type == bfd_link_hash_defweak) | |
2664 | && !BFINFDPIC_SYM_LOCAL (info, h)) | |
2665 | { | |
2666 | osec = sec = NULL; | |
2667 | relocation = 0; | |
2668 | } | |
2669 | ||
2670 | switch (r_type) | |
2671 | { | |
2672 | case R_pcrel24: | |
2673 | case R_pcrel24_jump_l: | |
2674 | case R_byte4_data: | |
2675 | if (! IS_FDPIC (output_bfd)) | |
2676 | goto non_fdpic; | |
2677 | ||
2678 | case R_BFIN_GOT17M4: | |
2679 | case R_BFIN_GOTHI: | |
2680 | case R_BFIN_GOTLO: | |
2681 | case R_BFIN_FUNCDESC_GOT17M4: | |
2682 | case R_BFIN_FUNCDESC_GOTHI: | |
2683 | case R_BFIN_FUNCDESC_GOTLO: | |
2684 | case R_BFIN_GOTOFF17M4: | |
2685 | case R_BFIN_GOTOFFHI: | |
2686 | case R_BFIN_GOTOFFLO: | |
2687 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
2688 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
2689 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
2690 | case R_BFIN_FUNCDESC: | |
2691 | case R_BFIN_FUNCDESC_VALUE: | |
2692 | if (h != NULL) | |
2693 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info | |
2694 | (info), input_bfd, h, | |
2695 | orig_addend, INSERT); | |
2696 | else | |
2697 | /* In order to find the entry we created before, we must | |
2698 | use the original addend, not the one that may have been | |
2699 | modified by _bfd_elf_rela_local_sym(). */ | |
2700 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info | |
2701 | (info), input_bfd, r_symndx, | |
2702 | orig_addend, INSERT); | |
2703 | if (! picrel) | |
2704 | return FALSE; | |
2705 | ||
2706 | if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info, | |
2707 | osec, sym, | |
2708 | rel->r_addend)) | |
2709 | { | |
2710 | (*_bfd_error_handler) | |
2711 | (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"), | |
2712 | input_bfd, input_section, rel->r_offset, name); | |
2713 | return FALSE; | |
2714 | ||
2715 | } | |
48d502e1 | 2716 | |
c96a8570 | 2717 | break; |
ab96bf03 | 2718 | |
c96a8570 BS |
2719 | default: |
2720 | non_fdpic: | |
2721 | picrel = NULL; | |
2722 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) | |
2723 | { | |
2724 | info->callbacks->warning | |
2725 | (info, _("relocation references symbol not defined in the module"), | |
2726 | name, input_bfd, input_section, rel->r_offset); | |
2727 | return FALSE; | |
2728 | } | |
2729 | break; | |
48d502e1 BS |
2730 | } |
2731 | ||
c96a8570 | 2732 | switch (r_type) |
ab96bf03 | 2733 | { |
c96a8570 BS |
2734 | case R_pcrel24: |
2735 | case R_pcrel24_jump_l: | |
2736 | check_segment[0] = isec_segment; | |
2737 | if (! IS_FDPIC (output_bfd)) | |
2738 | check_segment[1] = isec_segment; | |
2739 | else if (picrel->plt) | |
2740 | { | |
2741 | relocation = bfinfdpic_plt_section (info)->output_section->vma | |
2742 | + bfinfdpic_plt_section (info)->output_offset | |
2743 | + picrel->plt_entry; | |
2744 | check_segment[1] = plt_segment; | |
2745 | } | |
2746 | /* We don't want to warn on calls to undefined weak symbols, | |
2747 | as calls to them must be protected by non-NULL tests | |
2748 | anyway, and unprotected calls would invoke undefined | |
2749 | behavior. */ | |
2750 | else if (picrel->symndx == -1 | |
2751 | && picrel->d.h->root.type == bfd_link_hash_undefweak) | |
2752 | check_segment[1] = check_segment[0]; | |
2753 | else | |
2754 | check_segment[1] = sec | |
2755 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) | |
2756 | : (unsigned)-1; | |
2757 | break; | |
ab96bf03 | 2758 | |
c96a8570 BS |
2759 | case R_BFIN_GOT17M4: |
2760 | case R_BFIN_GOTHI: | |
2761 | case R_BFIN_GOTLO: | |
2762 | relocation = picrel->got_entry; | |
2763 | check_segment[0] = check_segment[1] = got_segment; | |
2764 | break; | |
ab96bf03 | 2765 | |
c96a8570 BS |
2766 | case R_BFIN_FUNCDESC_GOT17M4: |
2767 | case R_BFIN_FUNCDESC_GOTHI: | |
2768 | case R_BFIN_FUNCDESC_GOTLO: | |
2769 | relocation = picrel->fdgot_entry; | |
2770 | check_segment[0] = check_segment[1] = got_segment; | |
2771 | break; | |
48d502e1 | 2772 | |
c96a8570 BS |
2773 | case R_BFIN_GOTOFFHI: |
2774 | case R_BFIN_GOTOFF17M4: | |
2775 | case R_BFIN_GOTOFFLO: | |
2776 | relocation -= bfinfdpic_got_section (info)->output_section->vma | |
2777 | + bfinfdpic_got_section (info)->output_offset | |
2778 | + bfinfdpic_got_initial_offset (info); | |
2779 | check_segment[0] = got_segment; | |
2780 | check_segment[1] = sec | |
2781 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) | |
2782 | : (unsigned)-1; | |
2783 | break; | |
48d502e1 | 2784 | |
c96a8570 BS |
2785 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
2786 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
2787 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
2788 | relocation = picrel->fd_entry; | |
2789 | check_segment[0] = check_segment[1] = got_segment; | |
2790 | break; | |
48d502e1 | 2791 | |
c96a8570 | 2792 | case R_BFIN_FUNCDESC: |
48d502e1 | 2793 | { |
c96a8570 BS |
2794 | int dynindx; |
2795 | bfd_vma addend = rel->r_addend; | |
48d502e1 | 2796 | |
c96a8570 BS |
2797 | if (! (h && h->root.type == bfd_link_hash_undefweak |
2798 | && BFINFDPIC_SYM_LOCAL (info, h))) | |
2799 | { | |
2800 | /* If the symbol is dynamic and there may be dynamic | |
2801 | symbol resolution because we are or are linked with a | |
2802 | shared library, emit a FUNCDESC relocation such that | |
2803 | the dynamic linker will allocate the function | |
2804 | descriptor. If the symbol needs a non-local function | |
2805 | descriptor but binds locally (e.g., its visibility is | |
2806 | protected, emit a dynamic relocation decayed to | |
2807 | section+offset. */ | |
2808 | if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h) | |
2809 | && BFINFDPIC_SYM_LOCAL (info, h) | |
2810 | && !(info->executable && !info->pie)) | |
2811 | { | |
2812 | dynindx = elf_section_data (h->root.u.def.section | |
2813 | ->output_section)->dynindx; | |
2814 | addend += h->root.u.def.section->output_offset | |
2815 | + h->root.u.def.value; | |
2816 | } | |
2817 | else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)) | |
2818 | { | |
2819 | if (addend) | |
2820 | { | |
2821 | info->callbacks->warning | |
2822 | (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"), | |
2823 | name, input_bfd, input_section, rel->r_offset); | |
2824 | return FALSE; | |
2825 | } | |
2826 | dynindx = h->dynindx; | |
2827 | } | |
2828 | else | |
2829 | { | |
2830 | /* Otherwise, we know we have a private function | |
2831 | descriptor, so reference it directly. */ | |
2832 | BFD_ASSERT (picrel->privfd); | |
2833 | r_type = R_byte4_data; | |
2834 | dynindx = elf_section_data (bfinfdpic_got_section (info) | |
2835 | ->output_section)->dynindx; | |
2836 | addend = bfinfdpic_got_section (info)->output_offset | |
2837 | + bfinfdpic_got_initial_offset (info) | |
2838 | + picrel->fd_entry; | |
2839 | } | |
2840 | ||
2841 | /* If there is room for dynamic symbol resolution, emit | |
2842 | the dynamic relocation. However, if we're linking an | |
2843 | executable at a fixed location, we won't have emitted a | |
2844 | dynamic symbol entry for the got section, so idx will | |
2845 | be zero, which means we can and should compute the | |
2846 | address of the private descriptor ourselves. */ | |
2847 | if (info->executable && !info->pie | |
2848 | && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h))) | |
2849 | { | |
2850 | addend += bfinfdpic_got_section (info)->output_section->vma; | |
2851 | if ((bfd_get_section_flags (output_bfd, | |
2852 | input_section->output_section) | |
2853 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
2854 | { | |
2855 | if (_bfinfdpic_osec_readonly_p (output_bfd, | |
2856 | input_section | |
2857 | ->output_section)) | |
2858 | { | |
2859 | info->callbacks->warning | |
2860 | (info, | |
2861 | _("cannot emit fixups in read-only section"), | |
2862 | name, input_bfd, input_section, rel->r_offset); | |
2863 | return FALSE; | |
2864 | } | |
2865 | _bfinfdpic_add_rofixup (output_bfd, | |
2866 | bfinfdpic_gotfixup_section | |
2867 | (info), | |
2868 | _bfd_elf_section_offset | |
2869 | (output_bfd, info, | |
2870 | input_section, rel->r_offset) | |
2871 | + input_section | |
2872 | ->output_section->vma | |
2873 | + input_section->output_offset, | |
2874 | picrel); | |
2875 | } | |
2876 | } | |
2877 | else if ((bfd_get_section_flags (output_bfd, | |
2878 | input_section->output_section) | |
2879 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
2880 | { | |
2881 | bfd_vma offset; | |
2882 | ||
2883 | if (_bfinfdpic_osec_readonly_p (output_bfd, | |
2884 | input_section | |
2885 | ->output_section)) | |
2886 | { | |
2887 | info->callbacks->warning | |
2888 | (info, | |
2889 | _("cannot emit dynamic relocations in read-only section"), | |
2890 | name, input_bfd, input_section, rel->r_offset); | |
2891 | return FALSE; | |
2892 | } | |
2893 | offset = _bfd_elf_section_offset (output_bfd, info, | |
2894 | input_section, rel->r_offset); | |
2895 | /* Only output a reloc for a not deleted entry. */ | |
2896 | if (offset >= (bfd_vma) -2) | |
2897 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
2898 | bfinfdpic_gotrel_section (info), | |
2899 | 0, | |
2900 | R_unused0, | |
2901 | dynindx, addend, picrel); | |
2902 | else | |
2903 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
2904 | bfinfdpic_gotrel_section (info), | |
2905 | offset + input_section | |
2906 | ->output_section->vma | |
2907 | + input_section->output_offset, | |
2908 | r_type, | |
2909 | dynindx, addend, picrel); | |
2910 | } | |
2911 | else | |
2912 | addend += bfinfdpic_got_section (info)->output_section->vma; | |
2913 | } | |
2914 | ||
2915 | /* We want the addend in-place because dynamic | |
2916 | relocations are REL. Setting relocation to it should | |
2917 | arrange for it to be installed. */ | |
2918 | relocation = addend - rel->r_addend; | |
2919 | } | |
2920 | check_segment[0] = check_segment[1] = got_segment; | |
2921 | break; | |
2922 | ||
2923 | case R_byte4_data: | |
2924 | if (! IS_FDPIC (output_bfd)) | |
7a84e3da | 2925 | { |
c96a8570 BS |
2926 | check_segment[0] = check_segment[1] = -1; |
2927 | break; | |
7a84e3da | 2928 | } |
c96a8570 BS |
2929 | /* Fall through. */ |
2930 | case R_BFIN_FUNCDESC_VALUE: | |
2931 | { | |
2932 | int dynindx; | |
2933 | bfd_vma addend = rel->r_addend; | |
2934 | bfd_vma offset; | |
2935 | offset = _bfd_elf_section_offset (output_bfd, info, | |
2936 | input_section, rel->r_offset); | |
7a84e3da | 2937 | |
c96a8570 BS |
2938 | /* If the symbol is dynamic but binds locally, use |
2939 | section+offset. */ | |
2940 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) | |
48d502e1 | 2941 | { |
c96a8570 BS |
2942 | if (addend && r_type == R_BFIN_FUNCDESC_VALUE) |
2943 | { | |
2944 | info->callbacks->warning | |
2945 | (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"), | |
2946 | name, input_bfd, input_section, rel->r_offset); | |
2947 | return FALSE; | |
2948 | } | |
2949 | dynindx = h->dynindx; | |
48d502e1 | 2950 | } |
c96a8570 | 2951 | else |
48d502e1 | 2952 | { |
c96a8570 BS |
2953 | if (h) |
2954 | addend += h->root.u.def.value; | |
2955 | else | |
2956 | addend += sym->st_value; | |
2957 | if (osec) | |
2958 | addend += osec->output_offset; | |
2959 | if (osec && osec->output_section | |
2960 | && ! bfd_is_abs_section (osec->output_section) | |
2961 | && ! bfd_is_und_section (osec->output_section)) | |
2962 | dynindx = elf_section_data (osec->output_section)->dynindx; | |
2963 | else | |
2964 | dynindx = 0; | |
2965 | } | |
48d502e1 | 2966 | |
c96a8570 BS |
2967 | /* If we're linking an executable at a fixed address, we |
2968 | can omit the dynamic relocation as long as the symbol | |
2969 | is defined in the current link unit (which is implied | |
2970 | by its output section not being NULL). */ | |
2971 | if (info->executable && !info->pie | |
2972 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) | |
2973 | { | |
2974 | if (osec) | |
2975 | addend += osec->output_section->vma; | |
2976 | if (IS_FDPIC (input_bfd) | |
2977 | && (bfd_get_section_flags (output_bfd, | |
2978 | input_section->output_section) | |
2979 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
48d502e1 | 2980 | { |
c96a8570 BS |
2981 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
2982 | input_section | |
2983 | ->output_section)) | |
48d502e1 | 2984 | { |
c96a8570 BS |
2985 | info->callbacks->warning |
2986 | (info, | |
2987 | _("cannot emit fixups in read-only section"), | |
2988 | name, input_bfd, input_section, rel->r_offset); | |
2989 | return FALSE; | |
2990 | } | |
2991 | if (!h || h->root.type != bfd_link_hash_undefweak) | |
2992 | { | |
2993 | /* Only output a reloc for a not deleted entry. */ | |
2994 | if (offset >= (bfd_vma)-2) | |
2995 | _bfinfdpic_add_rofixup (output_bfd, | |
2996 | bfinfdpic_gotfixup_section | |
2997 | (info), -1, picrel); | |
2998 | else | |
2999 | _bfinfdpic_add_rofixup (output_bfd, | |
3000 | bfinfdpic_gotfixup_section | |
3001 | (info), | |
3002 | offset + input_section | |
3003 | ->output_section->vma | |
3004 | + input_section->output_offset, | |
3005 | picrel); | |
3006 | ||
3007 | if (r_type == R_BFIN_FUNCDESC_VALUE) | |
3008 | { | |
3009 | if (offset >= (bfd_vma)-2) | |
3010 | _bfinfdpic_add_rofixup | |
3011 | (output_bfd, | |
3012 | bfinfdpic_gotfixup_section (info), | |
3013 | -1, picrel); | |
3014 | else | |
3015 | _bfinfdpic_add_rofixup | |
3016 | (output_bfd, | |
3017 | bfinfdpic_gotfixup_section (info), | |
3018 | offset + input_section->output_section->vma | |
3019 | + input_section->output_offset + 4, picrel); | |
3020 | } | |
48d502e1 BS |
3021 | } |
3022 | } | |
48d502e1 BS |
3023 | } |
3024 | else | |
3025 | { | |
c96a8570 BS |
3026 | if ((bfd_get_section_flags (output_bfd, |
3027 | input_section->output_section) | |
3028 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
48d502e1 | 3029 | { |
c96a8570 BS |
3030 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
3031 | input_section | |
3032 | ->output_section)) | |
48d502e1 | 3033 | { |
c96a8570 BS |
3034 | info->callbacks->warning |
3035 | (info, | |
3036 | _("cannot emit dynamic relocations in read-only section"), | |
3037 | name, input_bfd, input_section, rel->r_offset); | |
3038 | return FALSE; | |
48d502e1 | 3039 | } |
c96a8570 BS |
3040 | /* Only output a reloc for a not deleted entry. */ |
3041 | if (offset >= (bfd_vma)-2) | |
3042 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
3043 | bfinfdpic_gotrel_section (info), | |
3044 | 0, R_unused0, dynindx, addend, picrel); | |
3045 | else | |
3046 | _bfinfdpic_add_dyn_reloc (output_bfd, | |
3047 | bfinfdpic_gotrel_section (info), | |
3048 | offset | |
3049 | + input_section | |
3050 | ->output_section->vma | |
3051 | + input_section->output_offset, | |
3052 | r_type, dynindx, addend, picrel); | |
48d502e1 | 3053 | } |
c96a8570 BS |
3054 | else if (osec) |
3055 | addend += osec->output_section->vma; | |
3056 | /* We want the addend in-place because dynamic | |
3057 | relocations are REL. Setting relocation to it | |
3058 | should arrange for it to be installed. */ | |
3059 | relocation = addend - rel->r_addend; | |
3060 | } | |
3061 | ||
3062 | if (r_type == R_BFIN_FUNCDESC_VALUE && offset < (bfd_vma)-2) | |
3063 | { | |
3064 | /* If we've omitted the dynamic relocation, just emit | |
3065 | the fixed addresses of the symbol and of the local | |
3066 | GOT base offset. */ | |
3067 | if (info->executable && !info->pie | |
3068 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) | |
3069 | bfd_put_32 (output_bfd, | |
3070 | bfinfdpic_got_section (info)->output_section->vma | |
3071 | + bfinfdpic_got_section (info)->output_offset | |
3072 | + bfinfdpic_got_initial_offset (info), | |
3073 | contents + rel->r_offset + 4); | |
3074 | else | |
3075 | /* A function descriptor used for lazy or local | |
3076 | resolving is initialized such that its high word | |
3077 | contains the output section index in which the | |
3078 | PLT entries are located, and the low word | |
3079 | contains the offset of the lazy PLT entry entry | |
3080 | point into that section. */ | |
3081 | bfd_put_32 (output_bfd, | |
3082 | h && ! BFINFDPIC_SYM_LOCAL (info, h) | |
3083 | ? 0 | |
3084 | : _bfinfdpic_osec_to_segment (output_bfd, | |
3085 | sec | |
3086 | ->output_section), | |
3087 | contents + rel->r_offset + 4); | |
48d502e1 | 3088 | } |
c96a8570 BS |
3089 | } |
3090 | check_segment[0] = check_segment[1] = got_segment; | |
3091 | break; | |
3092 | ||
3093 | default: | |
3094 | check_segment[0] = isec_segment; | |
3095 | check_segment[1] = sec | |
3096 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) | |
3097 | : (unsigned)-1; | |
3098 | break; | |
3099 | } | |
3100 | ||
3101 | if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd)) | |
3102 | { | |
3103 | #if 1 /* If you take this out, remove the #error from fdpic-static-6.d | |
3104 | in the ld testsuite. */ | |
3105 | /* This helps catch problems in GCC while we can't do more | |
3106 | than static linking. The idea is to test whether the | |
3107 | input file basename is crt0.o only once. */ | |
3108 | if (silence_segment_error == 1) | |
3109 | silence_segment_error = | |
3110 | (strlen (input_bfd->filename) == 6 | |
3111 | && strcmp (input_bfd->filename, "crt0.o") == 0) | |
3112 | || (strlen (input_bfd->filename) > 6 | |
3113 | && strcmp (input_bfd->filename | |
3114 | + strlen (input_bfd->filename) - 7, | |
3115 | "/crt0.o") == 0) | |
3116 | ? -1 : 0; | |
3117 | #endif | |
3118 | if (!silence_segment_error | |
3119 | /* We don't want duplicate errors for undefined | |
3120 | symbols. */ | |
3121 | && !(picrel && picrel->symndx == -1 | |
3122 | && picrel->d.h->root.type == bfd_link_hash_undefined)) | |
3123 | info->callbacks->warning | |
3124 | (info, | |
3125 | (info->shared || info->pie) | |
3126 | ? _("relocations between different segments are not supported") | |
3127 | : _("warning: relocation references a different segment"), | |
3128 | name, input_bfd, input_section, rel->r_offset); | |
3129 | if (!silence_segment_error && (info->shared || info->pie)) | |
3130 | return FALSE; | |
3131 | elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC; | |
3132 | } | |
3133 | ||
3134 | switch (r_type) | |
3135 | { | |
3136 | case R_BFIN_GOTOFFHI: | |
3137 | /* We need the addend to be applied before we shift the | |
3138 | value right. */ | |
3139 | relocation += rel->r_addend; | |
3140 | /* Fall through. */ | |
3141 | case R_BFIN_GOTHI: | |
3142 | case R_BFIN_FUNCDESC_GOTHI: | |
3143 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
3144 | relocation >>= 16; | |
3145 | /* Fall through. */ | |
48d502e1 | 3146 | |
c96a8570 BS |
3147 | case R_BFIN_GOTLO: |
3148 | case R_BFIN_FUNCDESC_GOTLO: | |
3149 | case R_BFIN_GOTOFFLO: | |
3150 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
3151 | relocation &= 0xffff; | |
3152 | break; | |
48d502e1 | 3153 | |
48d502e1 | 3154 | default: |
48d502e1 BS |
3155 | break; |
3156 | } | |
3157 | ||
c96a8570 | 3158 | switch (r_type) |
48d502e1 | 3159 | { |
c96a8570 BS |
3160 | case R_pcrel24: |
3161 | case R_pcrel24_jump_l: | |
3162 | if (! IS_FDPIC (output_bfd) || ! picrel->plt) | |
3163 | break; | |
3164 | /* Fall through. */ | |
3165 | ||
3166 | /* When referencing a GOT entry, a function descriptor or a | |
3167 | PLT, we don't want the addend to apply to the reference, | |
3168 | but rather to the referenced symbol. The actual entry | |
3169 | will have already been created taking the addend into | |
3170 | account, so cancel it out here. */ | |
3171 | case R_BFIN_GOT17M4: | |
3172 | case R_BFIN_GOTHI: | |
3173 | case R_BFIN_GOTLO: | |
3174 | case R_BFIN_FUNCDESC_GOT17M4: | |
3175 | case R_BFIN_FUNCDESC_GOTHI: | |
3176 | case R_BFIN_FUNCDESC_GOTLO: | |
3177 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
3178 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
3179 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
3180 | /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4 | |
3181 | here, since we do want to apply the addend to the others. | |
3182 | Note that we've applied the addend to GOTOFFHI before we | |
3183 | shifted it right. */ | |
3184 | case R_BFIN_GOTOFFHI: | |
3185 | relocation -= rel->r_addend; | |
3186 | break; | |
3187 | ||
3188 | default: | |
3189 | break; | |
48d502e1 BS |
3190 | } |
3191 | ||
c96a8570 BS |
3192 | r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, |
3193 | contents, rel->r_offset, | |
3194 | relocation, rel->r_addend); | |
3195 | ||
48d502e1 BS |
3196 | if (r != bfd_reloc_ok) |
3197 | { | |
c96a8570 | 3198 | const char * msg = (const char *) NULL; |
48d502e1 | 3199 | |
c96a8570 | 3200 | switch (r) |
48d502e1 | 3201 | { |
c96a8570 BS |
3202 | case bfd_reloc_overflow: |
3203 | r = info->callbacks->reloc_overflow | |
3204 | (info, (h ? &h->root : NULL), name, howto->name, | |
3205 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3206 | break; | |
0f64bb02 | 3207 | |
c96a8570 BS |
3208 | case bfd_reloc_undefined: |
3209 | r = info->callbacks->undefined_symbol | |
3210 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
3211 | break; | |
3212 | ||
3213 | case bfd_reloc_outofrange: | |
3214 | msg = _("internal error: out of range error"); | |
3215 | break; | |
3216 | ||
3217 | case bfd_reloc_notsupported: | |
3218 | msg = _("internal error: unsupported relocation error"); | |
3219 | break; | |
3220 | ||
3221 | case bfd_reloc_dangerous: | |
3222 | msg = _("internal error: dangerous relocation"); | |
3223 | break; | |
3224 | ||
3225 | default: | |
3226 | msg = _("internal error: unknown error"); | |
3227 | break; | |
48d502e1 | 3228 | } |
c96a8570 BS |
3229 | |
3230 | if (msg) | |
3231 | r = info->callbacks->warning | |
3232 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
3233 | ||
3234 | if (! r) | |
3235 | return FALSE; | |
48d502e1 BS |
3236 | } |
3237 | } | |
3238 | ||
3239 | return TRUE; | |
3240 | } | |
3241 | ||
2774f1a6 BS |
3242 | /* Update the relocation information for the relocations of the section |
3243 | being removed. */ | |
3244 | ||
3245 | static bfd_boolean | |
3246 | bfinfdpic_gc_sweep_hook (bfd *abfd, | |
3247 | struct bfd_link_info *info, | |
3248 | asection *sec, | |
3249 | const Elf_Internal_Rela *relocs) | |
3250 | { | |
3251 | Elf_Internal_Shdr *symtab_hdr; | |
3252 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
3253 | const Elf_Internal_Rela *rel; | |
3254 | const Elf_Internal_Rela *rel_end; | |
3255 | struct bfinfdpic_relocs_info *picrel; | |
3256 | ||
3257 | BFD_ASSERT (IS_FDPIC (abfd)); | |
3258 | ||
3259 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3260 | sym_hashes = elf_sym_hashes (abfd); | |
3261 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); | |
3262 | if (!elf_bad_symtab (abfd)) | |
3263 | sym_hashes_end -= symtab_hdr->sh_info; | |
3264 | ||
3265 | rel_end = relocs + sec->reloc_count; | |
3266 | for (rel = relocs; rel < rel_end; rel++) | |
3267 | { | |
3268 | struct elf_link_hash_entry *h; | |
3269 | unsigned long r_symndx; | |
3270 | ||
3271 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3272 | if (r_symndx < symtab_hdr->sh_info) | |
3273 | h = NULL; | |
3274 | else | |
3275 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
3276 | ||
3277 | if (h != NULL) | |
3278 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), | |
3279 | abfd, h, | |
3280 | rel->r_addend, NO_INSERT); | |
3281 | else | |
3282 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info | |
3283 | (info), abfd, r_symndx, | |
3284 | rel->r_addend, NO_INSERT); | |
3285 | ||
3286 | if (!picrel) | |
3287 | return TRUE; | |
3288 | ||
3289 | switch (ELF32_R_TYPE (rel->r_info)) | |
3290 | { | |
3291 | case R_pcrel24: | |
3292 | case R_pcrel24_jump_l: | |
3293 | picrel->call--; | |
3294 | break; | |
3295 | ||
3296 | case R_BFIN_FUNCDESC_VALUE: | |
3297 | picrel->relocsfdv--; | |
3298 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) | |
3299 | picrel->relocs32++; | |
3300 | /* Fall through. */ | |
3301 | ||
3302 | case R_byte4_data: | |
3303 | picrel->sym--; | |
3304 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) | |
3305 | picrel->relocs32--; | |
3306 | break; | |
3307 | ||
3308 | case R_BFIN_GOT17M4: | |
3309 | picrel->got17m4--; | |
3310 | break; | |
3311 | ||
3312 | case R_BFIN_GOTHI: | |
3313 | case R_BFIN_GOTLO: | |
3314 | picrel->gothilo--; | |
3315 | break; | |
3316 | ||
3317 | case R_BFIN_FUNCDESC_GOT17M4: | |
3318 | picrel->fdgot17m4--; | |
3319 | break; | |
3320 | ||
3321 | case R_BFIN_FUNCDESC_GOTHI: | |
3322 | case R_BFIN_FUNCDESC_GOTLO: | |
3323 | picrel->fdgothilo--; | |
3324 | break; | |
3325 | ||
3326 | case R_BFIN_GOTOFF17M4: | |
3327 | case R_BFIN_GOTOFFHI: | |
3328 | case R_BFIN_GOTOFFLO: | |
3329 | picrel->gotoff--; | |
3330 | break; | |
3331 | ||
3332 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
3333 | picrel->fdgoff17m4--; | |
3334 | break; | |
3335 | ||
3336 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
3337 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
3338 | picrel->fdgoffhilo--; | |
3339 | break; | |
3340 | ||
3341 | case R_BFIN_FUNCDESC: | |
3342 | picrel->fd--; | |
3343 | picrel->relocsfd--; | |
3344 | break; | |
3345 | ||
3346 | default: | |
3347 | break; | |
3348 | } | |
3349 | } | |
3350 | ||
3351 | return TRUE; | |
3352 | } | |
3353 | ||
48d502e1 BS |
3354 | /* We need dynamic symbols for every section, since segments can |
3355 | relocate independently. */ | |
3356 | static bfd_boolean | |
3357 | _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
3358 | struct bfd_link_info *info | |
3359 | ATTRIBUTE_UNUSED, | |
3360 | asection *p ATTRIBUTE_UNUSED) | |
3361 | { | |
3362 | switch (elf_section_data (p)->this_hdr.sh_type) | |
3363 | { | |
3364 | case SHT_PROGBITS: | |
3365 | case SHT_NOBITS: | |
3366 | /* If sh_type is yet undecided, assume it could be | |
3367 | SHT_PROGBITS/SHT_NOBITS. */ | |
3368 | case SHT_NULL: | |
3369 | return FALSE; | |
3370 | ||
3371 | /* There shouldn't be section relative relocations | |
3372 | against any other section. */ | |
3373 | default: | |
3374 | return TRUE; | |
3375 | } | |
3376 | } | |
3377 | ||
3378 | /* Create a .got section, as well as its additional info field. This | |
3379 | is almost entirely copied from | |
3380 | elflink.c:_bfd_elf_create_got_section(). */ | |
3381 | ||
3382 | static bfd_boolean | |
3383 | _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info) | |
3384 | { | |
3385 | flagword flags, pltflags; | |
3386 | asection *s; | |
3387 | struct elf_link_hash_entry *h; | |
48d502e1 BS |
3388 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
3389 | int ptralign; | |
3390 | int offset; | |
3391 | ||
3392 | /* This function may be called more than once. */ | |
3393 | s = bfd_get_section_by_name (abfd, ".got"); | |
3394 | if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) | |
3395 | return TRUE; | |
3396 | ||
3397 | /* Machine specific: although pointers are 32-bits wide, we want the | |
3398 | GOT to be aligned to a 64-bit boundary, such that function | |
3399 | descriptors in it can be accessed with 64-bit loads and | |
3400 | stores. */ | |
3401 | ptralign = 3; | |
3402 | ||
3403 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
3404 | | SEC_LINKER_CREATED); | |
3405 | pltflags = flags; | |
3406 | ||
3407 | s = bfd_make_section_with_flags (abfd, ".got", flags); | |
3408 | if (s == NULL | |
3409 | || !bfd_set_section_alignment (abfd, s, ptralign)) | |
3410 | return FALSE; | |
3411 | ||
3412 | if (bed->want_got_plt) | |
3413 | { | |
3414 | s = bfd_make_section_with_flags (abfd, ".got.plt", flags); | |
3415 | if (s == NULL | |
3416 | || !bfd_set_section_alignment (abfd, s, ptralign)) | |
3417 | return FALSE; | |
3418 | } | |
3419 | ||
3420 | if (bed->want_got_sym) | |
3421 | { | |
3422 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
3423 | (or .got.plt) section. We don't do this in the linker script | |
3424 | because we don't want to define the symbol if we are not creating | |
3425 | a global offset table. */ | |
5592d7ec | 3426 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_"); |
48d502e1 BS |
3427 | elf_hash_table (info)->hgot = h; |
3428 | if (h == NULL) | |
3429 | return FALSE; | |
3430 | ||
3431 | /* Machine-specific: we want the symbol for executables as | |
3432 | well. */ | |
3433 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3434 | return FALSE; | |
3435 | } | |
3436 | ||
3437 | /* The first bit of the global offset table is the header. */ | |
3438 | s->size += bed->got_header_size; | |
3439 | ||
3440 | /* This is the machine-specific part. Create and initialize section | |
3441 | data for the got. */ | |
3442 | if (IS_FDPIC (abfd)) | |
3443 | { | |
3444 | bfinfdpic_got_section (info) = s; | |
3445 | bfinfdpic_relocs_info (info) = htab_try_create (1, | |
3446 | bfinfdpic_relocs_info_hash, | |
3447 | bfinfdpic_relocs_info_eq, | |
3448 | (htab_del) NULL); | |
3449 | if (! bfinfdpic_relocs_info (info)) | |
3450 | return FALSE; | |
3451 | ||
3452 | s = bfd_make_section_with_flags (abfd, ".rel.got", | |
3453 | (flags | SEC_READONLY)); | |
3454 | if (s == NULL | |
3455 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
3456 | return FALSE; | |
3457 | ||
3458 | bfinfdpic_gotrel_section (info) = s; | |
3459 | ||
3460 | /* Machine-specific. */ | |
3461 | s = bfd_make_section_with_flags (abfd, ".rofixup", | |
3462 | (flags | SEC_READONLY)); | |
3463 | if (s == NULL | |
3464 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
3465 | return FALSE; | |
3466 | ||
3467 | bfinfdpic_gotfixup_section (info) = s; | |
3468 | offset = -2048; | |
3469 | flags = BSF_GLOBAL; | |
3470 | } | |
3471 | else | |
3472 | { | |
3473 | offset = 2048; | |
3474 | flags = BSF_GLOBAL | BSF_WEAK; | |
3475 | } | |
3476 | ||
48d502e1 BS |
3477 | return TRUE; |
3478 | } | |
3479 | ||
3480 | /* Make sure the got and plt sections exist, and that our pointers in | |
3481 | the link hash table point to them. */ | |
3482 | ||
3483 | static bfd_boolean | |
3484 | elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) | |
3485 | { | |
3486 | /* This is mostly copied from | |
3487 | elflink.c:_bfd_elf_create_dynamic_sections(). */ | |
3488 | flagword flags, pltflags; | |
3489 | asection *s; | |
3490 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3491 | ||
3492 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and | |
3493 | .rel[a].bss sections. */ | |
3494 | ||
3495 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
3496 | | SEC_LINKER_CREATED); | |
3497 | ||
3498 | pltflags = flags; | |
3499 | pltflags |= SEC_CODE; | |
3500 | if (bed->plt_not_loaded) | |
3501 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); | |
3502 | if (bed->plt_readonly) | |
3503 | pltflags |= SEC_READONLY; | |
3504 | ||
117ed4f8 | 3505 | s = bfd_make_section_with_flags (abfd, ".plt", pltflags); |
48d502e1 | 3506 | if (s == NULL |
48d502e1 BS |
3507 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
3508 | return FALSE; | |
3509 | /* Blackfin-specific: remember it. */ | |
3510 | bfinfdpic_plt_section (info) = s; | |
3511 | ||
3512 | if (bed->want_plt_sym) | |
3513 | { | |
3514 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the | |
3515 | .plt section. */ | |
3516 | struct elf_link_hash_entry *h; | |
3517 | struct bfd_link_hash_entry *bh = NULL; | |
3518 | ||
3519 | if (! (_bfd_generic_link_add_one_symbol | |
5592d7ec | 3520 | (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL, |
48d502e1 BS |
3521 | FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
3522 | return FALSE; | |
3523 | h = (struct elf_link_hash_entry *) bh; | |
3524 | h->def_regular = 1; | |
3525 | h->type = STT_OBJECT; | |
3526 | ||
3527 | if (! info->executable | |
3528 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3529 | return FALSE; | |
3530 | } | |
3531 | ||
3532 | /* Blackfin-specific: we want rel relocations for the plt. */ | |
117ed4f8 | 3533 | s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY); |
48d502e1 | 3534 | if (s == NULL |
48d502e1 BS |
3535 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
3536 | return FALSE; | |
3537 | /* Blackfin-specific: remember it. */ | |
3538 | bfinfdpic_pltrel_section (info) = s; | |
3539 | ||
3540 | /* Blackfin-specific: we want to create the GOT in the Blackfin way. */ | |
3541 | if (! _bfin_create_got_section (abfd, info)) | |
3542 | return FALSE; | |
3543 | ||
3544 | /* Blackfin-specific: make sure we created everything we wanted. */ | |
3545 | BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info) | |
3546 | /* && bfinfdpic_gotfixup_section (info) */ | |
3547 | && bfinfdpic_plt_section (info) | |
3548 | && bfinfdpic_pltrel_section (info)); | |
3549 | ||
3550 | if (bed->want_dynbss) | |
3551 | { | |
3552 | /* The .dynbss section is a place to put symbols which are defined | |
3553 | by dynamic objects, are referenced by regular objects, and are | |
3554 | not functions. We must allocate space for them in the process | |
3555 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
3556 | initialize them at run time. The linker script puts the .dynbss | |
3557 | section into the .bss section of the final image. */ | |
117ed4f8 AM |
3558 | s = bfd_make_section_with_flags (abfd, ".dynbss", |
3559 | SEC_ALLOC | SEC_LINKER_CREATED); | |
3560 | if (s == NULL) | |
48d502e1 BS |
3561 | return FALSE; |
3562 | ||
3563 | /* The .rel[a].bss section holds copy relocs. This section is not | |
3564 | normally needed. We need to create it here, though, so that the | |
3565 | linker will map it to an output section. We can't just create it | |
3566 | only if we need it, because we will not know whether we need it | |
3567 | until we have seen all the input files, and the first time the | |
3568 | main linker code calls BFD after examining all the input files | |
3569 | (size_dynamic_sections) the input sections have already been | |
3570 | mapped to the output sections. If the section turns out not to | |
3571 | be needed, we can discard it later. We will never need this | |
3572 | section when generating a shared object, since they do not use | |
3573 | copy relocs. */ | |
3574 | if (! info->shared) | |
3575 | { | |
117ed4f8 AM |
3576 | s = bfd_make_section_with_flags (abfd, |
3577 | (bed->default_use_rela_p | |
3578 | ? ".rela.bss" : ".rel.bss"), | |
3579 | flags | SEC_READONLY); | |
48d502e1 | 3580 | if (s == NULL |
48d502e1 BS |
3581 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
3582 | return FALSE; | |
3583 | } | |
3584 | } | |
3585 | ||
3586 | return TRUE; | |
3587 | } | |
3588 | ||
48d502e1 BS |
3589 | /* Compute the total GOT size required by each symbol in each range. |
3590 | Symbols may require up to 4 words in the GOT: an entry pointing to | |
3591 | the symbol, an entry pointing to its function descriptor, and a | |
3592 | private function descriptors taking two words. */ | |
3593 | ||
3594 | static int | |
3595 | _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_) | |
3596 | { | |
3597 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3598 | struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_; | |
3599 | unsigned relocs = 0, fixups = 0; | |
3600 | ||
3601 | /* Allocate space for a GOT entry pointing to the symbol. */ | |
3602 | if (entry->got17m4) | |
3603 | dinfo->got17m4 += 4; | |
3604 | else if (entry->gothilo) | |
3605 | dinfo->gothilo += 4; | |
3606 | else | |
3607 | entry->relocs32--; | |
3608 | entry->relocs32++; | |
3609 | ||
3610 | /* Allocate space for a GOT entry pointing to the function | |
3611 | descriptor. */ | |
3612 | if (entry->fdgot17m4) | |
3613 | dinfo->got17m4 += 4; | |
3614 | else if (entry->fdgothilo) | |
3615 | dinfo->gothilo += 4; | |
3616 | else | |
3617 | entry->relocsfd--; | |
3618 | entry->relocsfd++; | |
3619 | ||
3620 | /* Decide whether we need a PLT entry, a function descriptor in the | |
3621 | GOT, and a lazy PLT entry for this symbol. */ | |
3622 | entry->plt = entry->call | |
3623 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) | |
3624 | && elf_hash_table (dinfo->info)->dynamic_sections_created; | |
3625 | entry->privfd = entry->plt | |
3626 | || entry->fdgoff17m4 || entry->fdgoffhilo | |
3627 | || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo) | |
3628 | && (entry->symndx != -1 | |
3629 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))); | |
3630 | entry->lazyplt = entry->privfd | |
3631 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) | |
3632 | && ! (dinfo->info->flags & DF_BIND_NOW) | |
3633 | && elf_hash_table (dinfo->info)->dynamic_sections_created; | |
3634 | ||
3635 | /* Allocate space for a function descriptor. */ | |
3636 | if (entry->fdgoff17m4) | |
3637 | dinfo->fd17m4 += 8; | |
3638 | else if (entry->privfd && entry->plt) | |
3639 | dinfo->fdplt += 8; | |
3640 | else if (entry->privfd) | |
3641 | dinfo->fdhilo += 8; | |
3642 | else | |
3643 | entry->relocsfdv--; | |
3644 | entry->relocsfdv++; | |
3645 | ||
3646 | if (entry->lazyplt) | |
3647 | dinfo->lzplt += LZPLT_NORMAL_SIZE; | |
3648 | ||
3649 | if (!dinfo->info->executable || dinfo->info->pie) | |
3650 | relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv; | |
3651 | else | |
3652 | { | |
3653 | if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)) | |
3654 | { | |
3655 | if (entry->symndx != -1 | |
3656 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
3657 | fixups += entry->relocs32 + 2 * entry->relocsfdv; | |
3658 | } | |
3659 | else | |
3660 | relocs += entry->relocs32 + entry->relocsfdv; | |
3661 | ||
3662 | if (entry->symndx != -1 | |
3663 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)) | |
3664 | { | |
3665 | if (entry->symndx != -1 | |
3666 | || entry->d.h->root.type != bfd_link_hash_undefweak) | |
3667 | fixups += entry->relocsfd; | |
3668 | } | |
3669 | else | |
3670 | relocs += entry->relocsfd; | |
3671 | } | |
3672 | ||
3673 | entry->dynrelocs += relocs; | |
3674 | entry->fixups += fixups; | |
3675 | dinfo->relocs += relocs; | |
3676 | dinfo->fixups += fixups; | |
3677 | ||
3678 | return 1; | |
3679 | } | |
3680 | ||
3681 | /* This structure is used to assign offsets to got entries, function | |
3682 | descriptors, plt entries and lazy plt entries. */ | |
3683 | ||
3684 | struct _bfinfdpic_dynamic_got_plt_info | |
3685 | { | |
3686 | /* Summary information collected with _bfinfdpic_count_got_plt_entries. */ | |
3687 | struct _bfinfdpic_dynamic_got_info g; | |
3688 | ||
3689 | /* For each addressable range, we record a MAX (positive) and MIN | |
3690 | (negative) value. CUR is used to assign got entries, and it's | |
3691 | incremented from an initial positive value to MAX, then from MIN | |
3692 | to FDCUR (unless FDCUR wraps around first). FDCUR is used to | |
3693 | assign function descriptors, and it's decreased from an initial | |
3694 | non-positive value to MIN, then from MAX down to CUR (unless CUR | |
3695 | wraps around first). All of MIN, MAX, CUR and FDCUR always point | |
3696 | to even words. ODD, if non-zero, indicates an odd word to be | |
3697 | used for the next got entry, otherwise CUR is used and | |
3698 | incremented by a pair of words, wrapping around when it reaches | |
3699 | MAX. FDCUR is decremented (and wrapped) before the next function | |
3700 | descriptor is chosen. FDPLT indicates the number of remaining | |
3701 | slots that can be used for function descriptors used only by PLT | |
3702 | entries. */ | |
3703 | struct _bfinfdpic_dynamic_got_alloc_data | |
3704 | { | |
3705 | bfd_signed_vma max, cur, odd, fdcur, min; | |
3706 | bfd_vma fdplt; | |
3707 | } got17m4, gothilo; | |
3708 | }; | |
3709 | ||
3710 | /* Determine the positive and negative ranges to be used by each | |
3711 | offset range in the GOT. FDCUR and CUR, that must be aligned to a | |
3712 | double-word boundary, are the minimum (negative) and maximum | |
3713 | (positive) GOT offsets already used by previous ranges, except for | |
3714 | an ODD entry that may have been left behind. GOT and FD indicate | |
3715 | the size of GOT entries and function descriptors that must be | |
3716 | placed within the range from -WRAP to WRAP. If there's room left, | |
3717 | up to FDPLT bytes should be reserved for additional function | |
3718 | descriptors. */ | |
3719 | ||
3720 | inline static bfd_signed_vma | |
3721 | _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad, | |
3722 | bfd_signed_vma fdcur, | |
3723 | bfd_signed_vma odd, | |
3724 | bfd_signed_vma cur, | |
3725 | bfd_vma got, | |
3726 | bfd_vma fd, | |
3727 | bfd_vma fdplt, | |
3728 | bfd_vma wrap) | |
3729 | { | |
3730 | bfd_signed_vma wrapmin = -wrap; | |
3731 | ||
3732 | /* Start at the given initial points. */ | |
3733 | gad->fdcur = fdcur; | |
3734 | gad->cur = cur; | |
3735 | ||
3736 | /* If we had an incoming odd word and we have any got entries that | |
3737 | are going to use it, consume it, otherwise leave gad->odd at | |
3738 | zero. We might force gad->odd to zero and return the incoming | |
3739 | odd such that it is used by the next range, but then GOT entries | |
3740 | might appear to be out of order and we wouldn't be able to | |
3741 | shorten the GOT by one word if it turns out to end with an | |
3742 | unpaired GOT entry. */ | |
3743 | if (odd && got) | |
3744 | { | |
3745 | gad->odd = odd; | |
3746 | got -= 4; | |
3747 | odd = 0; | |
3748 | } | |
3749 | else | |
3750 | gad->odd = 0; | |
3751 | ||
3752 | /* If we're left with an unpaired GOT entry, compute its location | |
3753 | such that we can return it. Otherwise, if got doesn't require an | |
3754 | odd number of words here, either odd was already zero in the | |
3755 | block above, or it was set to zero because got was non-zero, or | |
3756 | got was already zero. In the latter case, we want the value of | |
3757 | odd to carry over to the return statement, so we don't want to | |
3758 | reset odd unless the condition below is true. */ | |
3759 | if (got & 4) | |
3760 | { | |
3761 | odd = cur + got; | |
3762 | got += 4; | |
3763 | } | |
3764 | ||
3765 | /* Compute the tentative boundaries of this range. */ | |
3766 | gad->max = cur + got; | |
3767 | gad->min = fdcur - fd; | |
3768 | gad->fdplt = 0; | |
3769 | ||
3770 | /* If function descriptors took too much space, wrap some of them | |
3771 | around. */ | |
3772 | if (gad->min < wrapmin) | |
3773 | { | |
3774 | gad->max += wrapmin - gad->min; | |
3775 | gad->min = wrapmin; | |
3776 | } | |
3777 | /* If there is space left and we have function descriptors | |
3778 | referenced in PLT entries that could take advantage of shorter | |
3779 | offsets, place them here. */ | |
3780 | else if (fdplt && gad->min > wrapmin) | |
3781 | { | |
3782 | bfd_vma fds; | |
3783 | if ((bfd_vma) (gad->min - wrapmin) < fdplt) | |
3784 | fds = gad->min - wrapmin; | |
3785 | else | |
3786 | fds = fdplt; | |
3787 | ||
3788 | fdplt -= fds; | |
3789 | gad->min -= fds; | |
3790 | gad->fdplt += fds; | |
3791 | } | |
3792 | ||
3793 | /* If GOT entries took too much space, wrap some of them around. | |
3794 | This may well cause gad->min to become lower than wrapmin. This | |
3795 | will cause a relocation overflow later on, so we don't have to | |
3796 | report it here . */ | |
3797 | if ((bfd_vma) gad->max > wrap) | |
3798 | { | |
3799 | gad->min -= gad->max - wrap; | |
3800 | gad->max = wrap; | |
3801 | } | |
3802 | /* If there is more space left, try to place some more function | |
3803 | descriptors for PLT entries. */ | |
3804 | else if (fdplt && (bfd_vma) gad->max < wrap) | |
3805 | { | |
3806 | bfd_vma fds; | |
3807 | if ((bfd_vma) (wrap - gad->max) < fdplt) | |
3808 | fds = wrap - gad->max; | |
3809 | else | |
3810 | fds = fdplt; | |
3811 | ||
3812 | fdplt -= fds; | |
3813 | gad->max += fds; | |
3814 | gad->fdplt += fds; | |
3815 | } | |
3816 | ||
3817 | /* If odd was initially computed as an offset past the wrap point, | |
3818 | wrap it around. */ | |
3819 | if (odd > gad->max) | |
3820 | odd = gad->min + odd - gad->max; | |
3821 | ||
3822 | /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed | |
3823 | before returning, so do it here too. This guarantees that, | |
3824 | should cur and fdcur meet at the wrap point, they'll both be | |
3825 | equal to min. */ | |
3826 | if (gad->cur == gad->max) | |
3827 | gad->cur = gad->min; | |
3828 | ||
3829 | return odd; | |
3830 | } | |
3831 | ||
3832 | /* Compute the location of the next GOT entry, given the allocation | |
3833 | data for a range. */ | |
3834 | ||
3835 | inline static bfd_signed_vma | |
3836 | _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) | |
3837 | { | |
3838 | bfd_signed_vma ret; | |
3839 | ||
3840 | if (gad->odd) | |
3841 | { | |
3842 | /* If there was an odd word left behind, use it. */ | |
3843 | ret = gad->odd; | |
3844 | gad->odd = 0; | |
3845 | } | |
3846 | else | |
3847 | { | |
3848 | /* Otherwise, use the word pointed to by cur, reserve the next | |
3849 | as an odd word, and skip to the next pair of words, possibly | |
3850 | wrapping around. */ | |
3851 | ret = gad->cur; | |
3852 | gad->odd = gad->cur + 4; | |
3853 | gad->cur += 8; | |
3854 | if (gad->cur == gad->max) | |
3855 | gad->cur = gad->min; | |
3856 | } | |
3857 | ||
3858 | return ret; | |
3859 | } | |
3860 | ||
3861 | /* Compute the location of the next function descriptor entry in the | |
3862 | GOT, given the allocation data for a range. */ | |
3863 | ||
3864 | inline static bfd_signed_vma | |
3865 | _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) | |
3866 | { | |
3867 | /* If we're at the bottom, wrap around, and only then allocate the | |
3868 | next pair of words. */ | |
3869 | if (gad->fdcur == gad->min) | |
3870 | gad->fdcur = gad->max; | |
3871 | return gad->fdcur -= 8; | |
3872 | } | |
3873 | ||
3874 | /* Assign GOT offsets for every GOT entry and function descriptor. | |
3875 | Doing everything in a single pass is tricky. */ | |
3876 | ||
3877 | static int | |
3878 | _bfinfdpic_assign_got_entries (void **entryp, void *info_) | |
3879 | { | |
3880 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3881 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; | |
3882 | ||
3883 | if (entry->got17m4) | |
3884 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); | |
3885 | else if (entry->gothilo) | |
3886 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); | |
3887 | ||
3888 | if (entry->fdgot17m4) | |
3889 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); | |
3890 | else if (entry->fdgothilo) | |
3891 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); | |
3892 | ||
3893 | if (entry->fdgoff17m4) | |
3894 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); | |
3895 | else if (entry->plt && dinfo->got17m4.fdplt) | |
3896 | { | |
3897 | dinfo->got17m4.fdplt -= 8; | |
3898 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); | |
3899 | } | |
3900 | else if (entry->plt) | |
3901 | { | |
3902 | dinfo->gothilo.fdplt -= 8; | |
3903 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); | |
3904 | } | |
3905 | else if (entry->privfd) | |
3906 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); | |
3907 | ||
3908 | return 1; | |
3909 | } | |
3910 | ||
3911 | /* Assign GOT offsets to private function descriptors used by PLT | |
3912 | entries (or referenced by 32-bit offsets), as well as PLT entries | |
3913 | and lazy PLT entries. */ | |
3914 | ||
3915 | static int | |
3916 | _bfinfdpic_assign_plt_entries (void **entryp, void *info_) | |
3917 | { | |
3918 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3919 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; | |
3920 | ||
3921 | /* If this symbol requires a local function descriptor, allocate | |
3922 | one. */ | |
3923 | if (entry->privfd && entry->fd_entry == 0) | |
3924 | { | |
3925 | if (dinfo->got17m4.fdplt) | |
3926 | { | |
3927 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); | |
3928 | dinfo->got17m4.fdplt -= 8; | |
3929 | } | |
3930 | else | |
3931 | { | |
3932 | BFD_ASSERT (dinfo->gothilo.fdplt); | |
3933 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); | |
3934 | dinfo->gothilo.fdplt -= 8; | |
3935 | } | |
3936 | } | |
3937 | ||
3938 | if (entry->plt) | |
3939 | { | |
3940 | int size; | |
3941 | ||
3942 | /* We use the section's raw size to mark the location of the | |
3943 | next PLT entry. */ | |
3944 | entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size; | |
3945 | ||
3946 | /* Figure out the length of this PLT entry based on the | |
3947 | addressing mode we need to reach the function descriptor. */ | |
3948 | BFD_ASSERT (entry->fd_entry); | |
3949 | if (entry->fd_entry >= -(1 << (18 - 1)) | |
3950 | && entry->fd_entry + 4 < (1 << (18 - 1))) | |
3951 | size = 10; | |
3952 | else | |
3953 | size = 16; | |
3954 | ||
3955 | bfinfdpic_plt_section (dinfo->g.info)->size += size; | |
3956 | } | |
3957 | ||
3958 | if (entry->lazyplt) | |
3959 | { | |
3960 | entry->lzplt_entry = dinfo->g.lzplt; | |
3961 | dinfo->g.lzplt += LZPLT_NORMAL_SIZE; | |
3962 | /* If this entry is the one that gets the resolver stub, account | |
3963 | for the additional instruction. */ | |
3964 | if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE | |
3965 | == BFINFDPIC_LZPLT_RESOLV_LOC) | |
3966 | dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA; | |
3967 | } | |
3968 | ||
3969 | return 1; | |
3970 | } | |
3971 | ||
3972 | /* Follow indirect and warning hash entries so that each got entry | |
3973 | points to the final symbol definition. P must point to a pointer | |
3974 | to the hash table we're traversing. Since this traversal may | |
3975 | modify the hash table, we set this pointer to NULL to indicate | |
3976 | we've made a potentially-destructive change to the hash table, so | |
3977 | the traversal must be restarted. */ | |
3978 | static int | |
3979 | _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p) | |
3980 | { | |
3981 | struct bfinfdpic_relocs_info *entry = *entryp; | |
3982 | htab_t *htab = p; | |
3983 | ||
3984 | if (entry->symndx == -1) | |
3985 | { | |
3986 | struct elf_link_hash_entry *h = entry->d.h; | |
3987 | struct bfinfdpic_relocs_info *oentry; | |
3988 | ||
3989 | while (h->root.type == bfd_link_hash_indirect | |
3990 | || h->root.type == bfd_link_hash_warning) | |
3991 | h = (struct elf_link_hash_entry *)h->root.u.i.link; | |
3992 | ||
3993 | if (entry->d.h == h) | |
3994 | return 1; | |
3995 | ||
3996 | oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend, | |
3997 | NO_INSERT); | |
3998 | ||
3999 | if (oentry) | |
4000 | { | |
4001 | /* Merge the two entries. */ | |
4002 | bfinfdpic_pic_merge_early_relocs_info (oentry, entry); | |
4003 | htab_clear_slot (*htab, entryp); | |
4004 | return 1; | |
4005 | } | |
4006 | ||
4007 | entry->d.h = h; | |
4008 | ||
4009 | /* If we can't find this entry with the new bfd hash, re-insert | |
4010 | it, and get the traversal restarted. */ | |
4011 | if (! htab_find (*htab, entry)) | |
4012 | { | |
4013 | htab_clear_slot (*htab, entryp); | |
4014 | entryp = htab_find_slot (*htab, entry, INSERT); | |
4015 | if (! *entryp) | |
4016 | *entryp = entry; | |
4017 | /* Abort the traversal, since the whole table may have | |
4018 | moved, and leave it up to the parent to restart the | |
4019 | process. */ | |
4020 | *(htab_t *)p = NULL; | |
4021 | return 0; | |
4022 | } | |
4023 | } | |
4024 | ||
4025 | return 1; | |
4026 | } | |
4027 | ||
4028 | /* Set the sizes of the dynamic sections. */ | |
4029 | ||
4030 | static bfd_boolean | |
4031 | elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd, | |
4032 | struct bfd_link_info *info) | |
4033 | { | |
4034 | bfd *dynobj; | |
4035 | asection *s; | |
4036 | struct _bfinfdpic_dynamic_got_plt_info gpinfo; | |
4037 | bfd_signed_vma odd; | |
4038 | bfd_vma limit; | |
4039 | ||
4040 | dynobj = elf_hash_table (info)->dynobj; | |
4041 | BFD_ASSERT (dynobj != NULL); | |
4042 | ||
4043 | if (elf_hash_table (info)->dynamic_sections_created) | |
4044 | { | |
4045 | /* Set the contents of the .interp section to the interpreter. */ | |
4046 | if (info->executable) | |
4047 | { | |
4048 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
4049 | BFD_ASSERT (s != NULL); | |
4050 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
4051 | s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; | |
4052 | } | |
4053 | } | |
4054 | ||
4055 | memset (&gpinfo, 0, sizeof (gpinfo)); | |
4056 | gpinfo.g.info = info; | |
4057 | ||
4058 | for (;;) | |
4059 | { | |
4060 | htab_t relocs = bfinfdpic_relocs_info (info); | |
4061 | ||
4062 | htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs); | |
4063 | ||
4064 | if (relocs == bfinfdpic_relocs_info (info)) | |
4065 | break; | |
4066 | } | |
4067 | ||
4068 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries, | |
4069 | &gpinfo.g); | |
4070 | ||
4071 | odd = 12; | |
4072 | /* Compute the total size taken by entries in the 18-bit range, | |
4073 | to tell how many PLT function descriptors we can bring into it | |
4074 | without causing it to overflow. */ | |
4075 | limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4; | |
4076 | if (limit < (bfd_vma)1 << 18) | |
4077 | limit = ((bfd_vma)1 << 18) - limit; | |
4078 | else | |
4079 | limit = 0; | |
4080 | if (gpinfo.g.fdplt < limit) | |
4081 | limit = gpinfo.g.fdplt; | |
4082 | ||
4083 | /* Determine the ranges of GOT offsets that we can use for each | |
4084 | range of addressing modes. */ | |
4085 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4, | |
4086 | 0, | |
4087 | odd, | |
4088 | 16, | |
4089 | gpinfo.g.got17m4, | |
4090 | gpinfo.g.fd17m4, | |
4091 | limit, | |
4092 | (bfd_vma)1 << (18-1)); | |
4093 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo, | |
4094 | gpinfo.got17m4.min, | |
4095 | odd, | |
4096 | gpinfo.got17m4.max, | |
4097 | gpinfo.g.gothilo, | |
4098 | gpinfo.g.fdhilo, | |
4099 | gpinfo.g.fdplt - gpinfo.got17m4.fdplt, | |
4100 | (bfd_vma)1 << (32-1)); | |
4101 | ||
4102 | /* Now assign (most) GOT offsets. */ | |
4103 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries, | |
4104 | &gpinfo); | |
4105 | ||
4106 | bfinfdpic_got_section (info)->size = gpinfo.gothilo.max | |
4107 | - gpinfo.gothilo.min | |
4108 | /* If an odd word is the last word of the GOT, we don't need this | |
4109 | word to be part of the GOT. */ | |
4110 | - (odd + 4 == gpinfo.gothilo.max ? 4 : 0); | |
4111 | if (bfinfdpic_got_section (info)->size == 0) | |
4112 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; | |
4113 | else if (bfinfdpic_got_section (info)->size == 12 | |
4114 | && ! elf_hash_table (info)->dynamic_sections_created) | |
4115 | { | |
4116 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; | |
4117 | bfinfdpic_got_section (info)->size = 0; | |
4118 | } | |
4119 | else | |
4120 | { | |
4121 | bfinfdpic_got_section (info)->contents = | |
4122 | (bfd_byte *) bfd_zalloc (dynobj, | |
4123 | bfinfdpic_got_section (info)->size); | |
4124 | if (bfinfdpic_got_section (info)->contents == NULL) | |
4125 | return FALSE; | |
4126 | } | |
4127 | ||
4128 | if (elf_hash_table (info)->dynamic_sections_created) | |
4129 | /* Subtract the number of lzplt entries, since those will generate | |
4130 | relocations in the pltrel section. */ | |
4131 | bfinfdpic_gotrel_section (info)->size = | |
4132 | (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE) | |
4133 | * get_elf_backend_data (output_bfd)->s->sizeof_rel; | |
4134 | else | |
4135 | BFD_ASSERT (gpinfo.g.relocs == 0); | |
4136 | if (bfinfdpic_gotrel_section (info)->size == 0) | |
4137 | bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE; | |
4138 | else | |
4139 | { | |
4140 | bfinfdpic_gotrel_section (info)->contents = | |
4141 | (bfd_byte *) bfd_zalloc (dynobj, | |
4142 | bfinfdpic_gotrel_section (info)->size); | |
4143 | if (bfinfdpic_gotrel_section (info)->contents == NULL) | |
4144 | return FALSE; | |
4145 | } | |
4146 | ||
4147 | bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4; | |
4148 | if (bfinfdpic_gotfixup_section (info)->size == 0) | |
4149 | bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE; | |
4150 | else | |
4151 | { | |
4152 | bfinfdpic_gotfixup_section (info)->contents = | |
4153 | (bfd_byte *) bfd_zalloc (dynobj, | |
4154 | bfinfdpic_gotfixup_section (info)->size); | |
4155 | if (bfinfdpic_gotfixup_section (info)->contents == NULL) | |
4156 | return FALSE; | |
4157 | } | |
4158 | ||
4159 | if (elf_hash_table (info)->dynamic_sections_created) | |
4160 | { | |
4161 | bfinfdpic_pltrel_section (info)->size = | |
4162 | gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel; | |
4163 | if (bfinfdpic_pltrel_section (info)->size == 0) | |
4164 | bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE; | |
4165 | else | |
4166 | { | |
4167 | bfinfdpic_pltrel_section (info)->contents = | |
4168 | (bfd_byte *) bfd_zalloc (dynobj, | |
4169 | bfinfdpic_pltrel_section (info)->size); | |
4170 | if (bfinfdpic_pltrel_section (info)->contents == NULL) | |
4171 | return FALSE; | |
4172 | } | |
4173 | } | |
4174 | ||
4175 | /* Add 4 bytes for every block of at most 65535 lazy PLT entries, | |
4176 | such that there's room for the additional instruction needed to | |
4177 | call the resolver. Since _bfinfdpic_assign_got_entries didn't | |
4178 | account for them, our block size is 4 bytes smaller than the real | |
4179 | block size. */ | |
4180 | if (elf_hash_table (info)->dynamic_sections_created) | |
4181 | { | |
4182 | bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt | |
4183 | + ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE) | |
4184 | / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA); | |
4185 | } | |
4186 | ||
4187 | /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to | |
4188 | actually assign lazy PLT entries addresses. */ | |
4189 | gpinfo.g.lzplt = 0; | |
4190 | ||
4191 | /* Save information that we're going to need to generate GOT and PLT | |
4192 | entries. */ | |
4193 | bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min; | |
4194 | ||
4195 | if (get_elf_backend_data (output_bfd)->want_got_sym) | |
4196 | elf_hash_table (info)->hgot->root.u.def.value | |
4197 | += bfinfdpic_got_initial_offset (info); | |
4198 | ||
4199 | if (elf_hash_table (info)->dynamic_sections_created) | |
4200 | bfinfdpic_plt_initial_offset (info) = | |
4201 | bfinfdpic_plt_section (info)->size; | |
4202 | ||
4203 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries, | |
4204 | &gpinfo); | |
4205 | ||
4206 | /* Allocate the PLT section contents only after | |
4207 | _bfinfdpic_assign_plt_entries has a chance to add the size of the | |
4208 | non-lazy PLT entries. */ | |
4209 | if (elf_hash_table (info)->dynamic_sections_created) | |
4210 | { | |
4211 | if (bfinfdpic_plt_section (info)->size == 0) | |
4212 | bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE; | |
4213 | else | |
4214 | { | |
4215 | bfinfdpic_plt_section (info)->contents = | |
4216 | (bfd_byte *) bfd_zalloc (dynobj, | |
4217 | bfinfdpic_plt_section (info)->size); | |
4218 | if (bfinfdpic_plt_section (info)->contents == NULL) | |
4219 | return FALSE; | |
4220 | } | |
4221 | } | |
4222 | ||
4223 | if (elf_hash_table (info)->dynamic_sections_created) | |
4224 | { | |
4225 | if (bfinfdpic_got_section (info)->size) | |
4226 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)) | |
4227 | return FALSE; | |
4228 | ||
4229 | if (bfinfdpic_pltrel_section (info)->size) | |
4230 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
4231 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL) | |
4232 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) | |
4233 | return FALSE; | |
4234 | ||
4235 | if (bfinfdpic_gotrel_section (info)->size) | |
4236 | if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0) | |
4237 | || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0) | |
4238 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, | |
4239 | sizeof (Elf32_External_Rel))) | |
4240 | return FALSE; | |
4241 | } | |
4242 | ||
4243 | return TRUE; | |
4244 | } | |
4245 | ||
4246 | static bfd_boolean | |
4247 | elf32_bfinfdpic_always_size_sections (bfd *output_bfd, | |
4248 | struct bfd_link_info *info) | |
4249 | { | |
4250 | if (!info->relocatable) | |
4251 | { | |
4252 | struct elf_link_hash_entry *h; | |
48d502e1 BS |
4253 | |
4254 | /* Force a PT_GNU_STACK segment to be created. */ | |
4255 | if (! elf_tdata (output_bfd)->stack_flags) | |
4256 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; | |
4257 | ||
4258 | /* Define __stacksize if it's not defined yet. */ | |
4259 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", | |
4260 | FALSE, FALSE, FALSE); | |
4261 | if (! h || h->root.type != bfd_link_hash_defined | |
4262 | || h->type != STT_OBJECT | |
4263 | || !h->def_regular) | |
4264 | { | |
4265 | struct bfd_link_hash_entry *bh = NULL; | |
4266 | ||
4267 | if (!(_bfd_generic_link_add_one_symbol | |
4268 | (info, output_bfd, "__stacksize", | |
4269 | BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE, | |
4270 | (const char *) NULL, FALSE, | |
4271 | get_elf_backend_data (output_bfd)->collect, &bh))) | |
4272 | return FALSE; | |
4273 | ||
4274 | h = (struct elf_link_hash_entry *) bh; | |
4275 | h->def_regular = 1; | |
4276 | h->type = STT_OBJECT; | |
4277 | } | |
48d502e1 BS |
4278 | } |
4279 | ||
4280 | return TRUE; | |
4281 | } | |
4282 | ||
4283 | static bfd_boolean | |
e36284ab AM |
4284 | elf32_bfinfdpic_modify_program_headers (bfd *output_bfd, |
4285 | struct bfd_link_info *info) | |
48d502e1 | 4286 | { |
e36284ab | 4287 | struct elf_obj_tdata *tdata = elf_tdata (output_bfd); |
48d502e1 | 4288 | struct elf_segment_map *m; |
e36284ab | 4289 | Elf_Internal_Phdr *p; |
48d502e1 BS |
4290 | |
4291 | /* objcopy and strip preserve what's already there using | |
4292 | elf32_bfinfdpic_copy_private_bfd_data (). */ | |
4293 | if (! info) | |
4294 | return TRUE; | |
4295 | ||
e36284ab | 4296 | for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++) |
48d502e1 BS |
4297 | if (m->p_type == PT_GNU_STACK) |
4298 | break; | |
4299 | ||
4300 | if (m) | |
4301 | { | |
48d502e1 BS |
4302 | struct elf_link_hash_entry *h; |
4303 | ||
e36284ab AM |
4304 | /* Obtain the pointer to the __stacksize symbol. */ |
4305 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", | |
4306 | FALSE, FALSE, FALSE); | |
4307 | if (h) | |
48d502e1 | 4308 | { |
48d502e1 BS |
4309 | while (h->root.type == bfd_link_hash_indirect |
4310 | || h->root.type == bfd_link_hash_warning) | |
e36284ab | 4311 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
48d502e1 | 4312 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
e36284ab | 4313 | } |
48d502e1 | 4314 | |
e36284ab AM |
4315 | /* Set the header p_memsz from the symbol value. We |
4316 | intentionally ignore the symbol section. */ | |
4317 | if (h && h->root.type == bfd_link_hash_defined) | |
4318 | p->p_memsz = h->root.u.def.value; | |
4319 | else | |
4320 | p->p_memsz = DEFAULT_STACK_SIZE; | |
48d502e1 | 4321 | |
e36284ab | 4322 | p->p_align = 8; |
48d502e1 BS |
4323 | } |
4324 | ||
4325 | return TRUE; | |
4326 | } | |
4327 | ||
4328 | static bfd_boolean | |
4329 | elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd, | |
4330 | struct bfd_link_info *info) | |
4331 | { | |
4332 | bfd *dynobj; | |
4333 | asection *sdyn; | |
4334 | ||
4335 | dynobj = elf_hash_table (info)->dynobj; | |
4336 | ||
4337 | if (bfinfdpic_got_section (info)) | |
4338 | { | |
4339 | BFD_ASSERT (bfinfdpic_gotrel_section (info)->size | |
4340 | == (bfinfdpic_gotrel_section (info)->reloc_count | |
4341 | * sizeof (Elf32_External_Rel))); | |
4342 | ||
4343 | if (bfinfdpic_gotfixup_section (info)) | |
4344 | { | |
4345 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; | |
4346 | bfd_vma got_value = hgot->root.u.def.value | |
4347 | + hgot->root.u.def.section->output_section->vma | |
4348 | + hgot->root.u.def.section->output_offset; | |
4349 | ||
4350 | _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info), | |
4351 | got_value, 0); | |
4352 | ||
4353 | if (bfinfdpic_gotfixup_section (info)->size | |
4354 | != (bfinfdpic_gotfixup_section (info)->reloc_count * 4)) | |
0f64bb02 CM |
4355 | { |
4356 | (*_bfd_error_handler) | |
48d502e1 | 4357 | ("LINKER BUG: .rofixup section size mismatch"); |
0f64bb02 CM |
4358 | return FALSE; |
4359 | } | |
4360 | } | |
4361 | } | |
48d502e1 BS |
4362 | if (elf_hash_table (info)->dynamic_sections_created) |
4363 | { | |
4364 | BFD_ASSERT (bfinfdpic_pltrel_section (info)->size | |
4365 | == (bfinfdpic_pltrel_section (info)->reloc_count | |
4366 | * sizeof (Elf32_External_Rel))); | |
4367 | } | |
4368 | ||
4369 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4370 | ||
4371 | if (elf_hash_table (info)->dynamic_sections_created) | |
4372 | { | |
4373 | Elf32_External_Dyn * dyncon; | |
4374 | Elf32_External_Dyn * dynconend; | |
4375 | ||
4376 | BFD_ASSERT (sdyn != NULL); | |
4377 | ||
4378 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
4379 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
4380 | ||
4381 | for (; dyncon < dynconend; dyncon++) | |
4382 | { | |
4383 | Elf_Internal_Dyn dyn; | |
4384 | ||
4385 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4386 | ||
4387 | switch (dyn.d_tag) | |
4388 | { | |
4389 | default: | |
4390 | break; | |
4391 | ||
4392 | case DT_PLTGOT: | |
4393 | dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma | |
4394 | + bfinfdpic_got_section (info)->output_offset | |
4395 | + bfinfdpic_got_initial_offset (info); | |
4396 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4397 | break; | |
4398 | ||
4399 | case DT_JMPREL: | |
4400 | dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info) | |
4401 | ->output_section->vma | |
4402 | + bfinfdpic_pltrel_section (info)->output_offset; | |
4403 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4404 | break; | |
4405 | ||
4406 | case DT_PLTRELSZ: | |
4407 | dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size; | |
4408 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4409 | break; | |
4410 | } | |
4411 | } | |
4412 | } | |
4413 | ||
4414 | return TRUE; | |
4415 | } | |
4416 | ||
4417 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
4418 | regular object. */ | |
4419 | ||
4420 | static bfd_boolean | |
4421 | elf32_bfinfdpic_adjust_dynamic_symbol | |
4422 | (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4423 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) | |
4424 | { | |
4425 | bfd * dynobj; | |
4426 | ||
4427 | dynobj = elf_hash_table (info)->dynobj; | |
4428 | ||
4429 | /* Make sure we know what is going on here. */ | |
4430 | BFD_ASSERT (dynobj != NULL | |
4431 | && (h->u.weakdef != NULL | |
4432 | || (h->def_dynamic | |
4433 | && h->ref_regular | |
4434 | && !h->def_regular))); | |
4435 | ||
4436 | /* If this is a weak symbol, and there is a real definition, the | |
4437 | processor independent code will have arranged for us to see the | |
4438 | real definition first, and we can just use the same value. */ | |
4439 | if (h->u.weakdef != NULL) | |
4440 | { | |
4441 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
4442 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
4443 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
4444 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
4445 | } | |
0f64bb02 CM |
4446 | |
4447 | return TRUE; | |
4448 | } | |
4449 | ||
48d502e1 BS |
4450 | /* Perform any actions needed for dynamic symbols. */ |
4451 | ||
4452 | static bfd_boolean | |
4453 | elf32_bfinfdpic_finish_dynamic_symbol | |
4454 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4455 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4456 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
4457 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) | |
0f64bb02 | 4458 | { |
48d502e1 BS |
4459 | return TRUE; |
4460 | } | |
0f64bb02 | 4461 | |
48d502e1 BS |
4462 | /* Decide whether to attempt to turn absptr or lsda encodings in |
4463 | shared libraries into pcrel within the given input section. */ | |
0f64bb02 | 4464 | |
48d502e1 BS |
4465 | static bfd_boolean |
4466 | bfinfdpic_elf_use_relative_eh_frame | |
4467 | (bfd *input_bfd ATTRIBUTE_UNUSED, | |
4468 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4469 | asection *eh_frame_section ATTRIBUTE_UNUSED) | |
4470 | { | |
4471 | /* We can't use PC-relative encodings in FDPIC binaries, in general. */ | |
4472 | return FALSE; | |
4473 | } | |
0f64bb02 | 4474 | |
48d502e1 | 4475 | /* Adjust the contents of an eh_frame_hdr section before they're output. */ |
0f64bb02 | 4476 | |
48d502e1 BS |
4477 | static bfd_byte |
4478 | bfinfdpic_elf_encode_eh_address (bfd *abfd, | |
4479 | struct bfd_link_info *info, | |
4480 | asection *osec, bfd_vma offset, | |
4481 | asection *loc_sec, bfd_vma loc_offset, | |
4482 | bfd_vma *encoded) | |
4483 | { | |
4484 | struct elf_link_hash_entry *h; | |
0f64bb02 | 4485 | |
48d502e1 BS |
4486 | h = elf_hash_table (info)->hgot; |
4487 | BFD_ASSERT (h && h->root.type == bfd_link_hash_defined); | |
4488 | ||
4489 | if (! h || (_bfinfdpic_osec_to_segment (abfd, osec) | |
4490 | == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section))) | |
4491 | return _bfd_elf_encode_eh_address (abfd, info, osec, offset, | |
4492 | loc_sec, loc_offset, encoded); | |
4493 | ||
4494 | BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec) | |
4495 | == (_bfinfdpic_osec_to_segment | |
4496 | (abfd, h->root.u.def.section->output_section))); | |
4497 | ||
4498 | *encoded = osec->vma + offset | |
4499 | - (h->root.u.def.value | |
4500 | + h->root.u.def.section->output_section->vma | |
4501 | + h->root.u.def.section->output_offset); | |
4502 | ||
4503 | return DW_EH_PE_datarel | DW_EH_PE_sdata4; | |
0f64bb02 CM |
4504 | } |
4505 | ||
4506 | ||
48d502e1 BS |
4507 | |
4508 | /* Look through the relocs for a section during the first phase. | |
4509 | ||
4510 | Besides handling virtual table relocs for gc, we have to deal with | |
4511 | all sorts of PIC-related relocations. We describe below the | |
4512 | general plan on how to handle such relocations, even though we only | |
4513 | collect information at this point, storing them in hash tables for | |
4514 | perusal of later passes. | |
4515 | ||
4516 | 32 relocations are propagated to the linker output when creating | |
4517 | position-independent output. LO16 and HI16 relocations are not | |
4518 | supposed to be encountered in this case. | |
4519 | ||
4520 | LABEL16 should always be resolvable by the linker, since it's only | |
4521 | used by branches. | |
4522 | ||
4523 | LABEL24, on the other hand, is used by calls. If it turns out that | |
4524 | the target of a call is a dynamic symbol, a PLT entry must be | |
4525 | created for it, which triggers the creation of a private function | |
4526 | descriptor and, unless lazy binding is disabled, a lazy PLT entry. | |
4527 | ||
4528 | GPREL relocations require the referenced symbol to be in the same | |
4529 | segment as _gp, but this can only be checked later. | |
4530 | ||
4531 | All GOT, GOTOFF and FUNCDESC relocations require a .got section to | |
4532 | exist. LABEL24 might as well, since it may require a PLT entry, | |
4533 | that will require a got. | |
4534 | ||
4535 | Non-FUNCDESC GOT relocations require a GOT entry to be created | |
4536 | regardless of whether the symbol is dynamic. However, since a | |
4537 | global symbol that turns out to not be exported may have the same | |
4538 | address of a non-dynamic symbol, we don't assign GOT entries at | |
4539 | this point, such that we can share them in this case. A relocation | |
4540 | for the GOT entry always has to be created, be it to offset a | |
4541 | private symbol by the section load address, be it to get the symbol | |
4542 | resolved dynamically. | |
4543 | ||
4544 | FUNCDESC GOT relocations require a GOT entry to be created, and | |
4545 | handled as if a FUNCDESC relocation was applied to the GOT entry in | |
4546 | an object file. | |
4547 | ||
4548 | FUNCDESC relocations referencing a symbol that turns out to NOT be | |
4549 | dynamic cause a private function descriptor to be created. The | |
4550 | FUNCDESC relocation then decays to a 32 relocation that points at | |
4551 | the private descriptor. If the symbol is dynamic, the FUNCDESC | |
4552 | relocation is propagated to the linker output, such that the | |
4553 | dynamic linker creates the canonical descriptor, pointing to the | |
4554 | dynamically-resolved definition of the function. | |
4555 | ||
4556 | Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic | |
4557 | symbols that are assigned to the same segment as the GOT, but we | |
4558 | can only check this later, after we know the complete set of | |
4559 | symbols defined and/or exported. | |
4560 | ||
4561 | FUNCDESC GOTOFF relocations require a function descriptor to be | |
4562 | created and, unless lazy binding is disabled or the symbol is not | |
4563 | dynamic, a lazy PLT entry. Since we can't tell at this point | |
4564 | whether a symbol is going to be dynamic, we have to decide later | |
4565 | whether to create a lazy PLT entry or bind the descriptor directly | |
4566 | to the private function. | |
4567 | ||
4568 | FUNCDESC_VALUE relocations are not supposed to be present in object | |
4569 | files, but they may very well be simply propagated to the linker | |
4570 | output, since they have no side effect. | |
4571 | ||
4572 | ||
4573 | A function descriptor always requires a FUNCDESC_VALUE relocation. | |
4574 | Whether it's in .plt.rel or not depends on whether lazy binding is | |
4575 | enabled and on whether the referenced symbol is dynamic. | |
4576 | ||
4577 | The existence of a lazy PLT requires the resolverStub lazy PLT | |
4578 | entry to be present. | |
4579 | ||
4580 | ||
4581 | As for assignment of GOT, PLT and lazy PLT entries, and private | |
4582 | descriptors, we might do them all sequentially, but we can do | |
4583 | better than that. For example, we can place GOT entries and | |
4584 | private function descriptors referenced using 12-bit operands | |
4585 | closer to the PIC register value, such that these relocations don't | |
4586 | overflow. Those that are only referenced with LO16 relocations | |
4587 | could come next, but we may as well place PLT-required function | |
4588 | descriptors in the 12-bit range to make them shorter. Symbols | |
4589 | referenced with LO16/HI16 may come next, but we may place | |
4590 | additional function descriptors in the 16-bit range if we can | |
4591 | reliably tell that we've already placed entries that are ever | |
4592 | referenced with only LO16. PLT entries are therefore generated as | |
4593 | small as possible, while not introducing relocation overflows in | |
4594 | GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be | |
4595 | generated before or after PLT entries, but not intermingled with | |
4596 | them, such that we can have more lazy PLT entries in range for a | |
4597 | branch to the resolverStub. The resolverStub should be emitted at | |
4598 | the most distant location from the first lazy PLT entry such that | |
4599 | it's still in range for a branch, or closer, if there isn't a need | |
4600 | for so many lazy PLT entries. Additional lazy PLT entries may be | |
4601 | emitted after the resolverStub, as long as branches are still in | |
4602 | range. If the branch goes out of range, longer lazy PLT entries | |
4603 | are emitted. | |
4604 | ||
4605 | We could further optimize PLT and lazy PLT entries by giving them | |
4606 | priority in assignment to closer-to-gr17 locations depending on the | |
4607 | number of occurrences of references to them (assuming a function | |
4608 | that's called more often is more important for performance, so its | |
4609 | PLT entry should be faster), or taking hints from the compiler. | |
4610 | Given infinite time and money... :-) */ | |
0f64bb02 CM |
4611 | |
4612 | static bfd_boolean | |
48d502e1 BS |
4613 | bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info, |
4614 | asection *sec, const Elf_Internal_Rela *relocs) | |
0f64bb02 CM |
4615 | { |
4616 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 4617 | struct elf_link_hash_entry **sym_hashes; |
48d502e1 BS |
4618 | const Elf_Internal_Rela *rel; |
4619 | const Elf_Internal_Rela *rel_end; | |
0f64bb02 | 4620 | bfd *dynobj; |
48d502e1 | 4621 | struct bfinfdpic_relocs_info *picrel; |
0f64bb02 | 4622 | |
48d502e1 | 4623 | if (info->relocatable) |
0f64bb02 CM |
4624 | return TRUE; |
4625 | ||
4626 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
4627 | sym_hashes = elf_sym_hashes (abfd); | |
0f64bb02 | 4628 | |
48d502e1 BS |
4629 | dynobj = elf_hash_table (info)->dynobj; |
4630 | rel_end = relocs + sec->reloc_count; | |
4631 | for (rel = relocs; rel < rel_end; rel++) | |
0f64bb02 | 4632 | { |
0f64bb02 | 4633 | struct elf_link_hash_entry *h; |
48d502e1 BS |
4634 | unsigned long r_symndx; |
4635 | ||
4636 | r_symndx = ELF32_R_SYM (rel->r_info); | |
4637 | if (r_symndx < symtab_hdr->sh_info) | |
4638 | h = NULL; | |
4639 | else | |
4640 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
0f64bb02 CM |
4641 | |
4642 | switch (ELF32_R_TYPE (rel->r_info)) | |
4643 | { | |
48d502e1 BS |
4644 | case R_BFIN_GOT17M4: |
4645 | case R_BFIN_GOTHI: | |
4646 | case R_BFIN_GOTLO: | |
4647 | case R_BFIN_FUNCDESC_GOT17M4: | |
4648 | case R_BFIN_FUNCDESC_GOTHI: | |
4649 | case R_BFIN_FUNCDESC_GOTLO: | |
4650 | case R_BFIN_GOTOFF17M4: | |
4651 | case R_BFIN_GOTOFFHI: | |
4652 | case R_BFIN_GOTOFFLO: | |
4653 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
4654 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
4655 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
4656 | case R_BFIN_FUNCDESC: | |
4657 | case R_BFIN_FUNCDESC_VALUE: | |
4658 | if (! IS_FDPIC (abfd)) | |
4659 | goto bad_reloc; | |
4660 | /* Fall through. */ | |
4661 | case R_pcrel24: | |
4662 | case R_pcrel24_jump_l: | |
4663 | case R_byte4_data: | |
4664 | if (IS_FDPIC (abfd) && ! dynobj) | |
0f64bb02 | 4665 | { |
48d502e1 BS |
4666 | elf_hash_table (info)->dynobj = dynobj = abfd; |
4667 | if (! _bfin_create_got_section (abfd, info)) | |
4668 | return FALSE; | |
0f64bb02 | 4669 | } |
48d502e1 | 4670 | if (! IS_FDPIC (abfd)) |
0f64bb02 | 4671 | { |
48d502e1 BS |
4672 | picrel = NULL; |
4673 | break; | |
4674 | } | |
4675 | if (h != NULL) | |
4676 | { | |
4677 | if (h->dynindx == -1) | |
4678 | switch (ELF_ST_VISIBILITY (h->other)) | |
4679 | { | |
4680 | case STV_INTERNAL: | |
4681 | case STV_HIDDEN: | |
4682 | break; | |
4683 | default: | |
4684 | bfd_elf_link_record_dynamic_symbol (info, h); | |
4685 | break; | |
4686 | } | |
4687 | picrel | |
4688 | = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), | |
4689 | abfd, h, | |
4690 | rel->r_addend, INSERT); | |
0f64bb02 | 4691 | } |
48d502e1 BS |
4692 | else |
4693 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info | |
4694 | (info), abfd, r_symndx, | |
4695 | rel->r_addend, INSERT); | |
4696 | if (! picrel) | |
4697 | return FALSE; | |
0f64bb02 | 4698 | break; |
48d502e1 | 4699 | |
0f64bb02 | 4700 | default: |
48d502e1 | 4701 | picrel = NULL; |
0f64bb02 CM |
4702 | break; |
4703 | } | |
48d502e1 BS |
4704 | |
4705 | switch (ELF32_R_TYPE (rel->r_info)) | |
4706 | { | |
4707 | case R_pcrel24: | |
4708 | case R_pcrel24_jump_l: | |
4709 | if (IS_FDPIC (abfd)) | |
2774f1a6 | 4710 | picrel->call++; |
48d502e1 BS |
4711 | break; |
4712 | ||
4713 | case R_BFIN_FUNCDESC_VALUE: | |
4714 | picrel->relocsfdv++; | |
4715 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) | |
4716 | picrel->relocs32--; | |
4717 | /* Fall through. */ | |
4718 | ||
4719 | case R_byte4_data: | |
4720 | if (! IS_FDPIC (abfd)) | |
4721 | break; | |
4722 | ||
2774f1a6 | 4723 | picrel->sym++; |
48d502e1 BS |
4724 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
4725 | picrel->relocs32++; | |
4726 | break; | |
4727 | ||
4728 | case R_BFIN_GOT17M4: | |
2774f1a6 | 4729 | picrel->got17m4++; |
48d502e1 BS |
4730 | break; |
4731 | ||
4732 | case R_BFIN_GOTHI: | |
4733 | case R_BFIN_GOTLO: | |
2774f1a6 | 4734 | picrel->gothilo++; |
48d502e1 BS |
4735 | break; |
4736 | ||
4737 | case R_BFIN_FUNCDESC_GOT17M4: | |
2774f1a6 | 4738 | picrel->fdgot17m4++; |
48d502e1 BS |
4739 | break; |
4740 | ||
4741 | case R_BFIN_FUNCDESC_GOTHI: | |
4742 | case R_BFIN_FUNCDESC_GOTLO: | |
2774f1a6 | 4743 | picrel->fdgothilo++; |
48d502e1 BS |
4744 | break; |
4745 | ||
4746 | case R_BFIN_GOTOFF17M4: | |
4747 | case R_BFIN_GOTOFFHI: | |
4748 | case R_BFIN_GOTOFFLO: | |
2774f1a6 | 4749 | picrel->gotoff++; |
48d502e1 BS |
4750 | break; |
4751 | ||
4752 | case R_BFIN_FUNCDESC_GOTOFF17M4: | |
2774f1a6 | 4753 | picrel->fdgoff17m4++; |
48d502e1 BS |
4754 | break; |
4755 | ||
4756 | case R_BFIN_FUNCDESC_GOTOFFHI: | |
4757 | case R_BFIN_FUNCDESC_GOTOFFLO: | |
2774f1a6 | 4758 | picrel->fdgoffhilo++; |
48d502e1 BS |
4759 | break; |
4760 | ||
4761 | case R_BFIN_FUNCDESC: | |
2774f1a6 | 4762 | picrel->fd++; |
48d502e1 BS |
4763 | picrel->relocsfd++; |
4764 | break; | |
4765 | ||
4766 | /* This relocation describes the C++ object vtable hierarchy. | |
4767 | Reconstruct it for later use during GC. */ | |
4768 | case R_BFIN_GNU_VTINHERIT: | |
4769 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
4770 | return FALSE; | |
4771 | break; | |
4772 | ||
4773 | /* This relocation describes which C++ vtable entries are actually | |
4774 | used. Record for later use during GC. */ | |
4775 | case R_BFIN_GNU_VTENTRY: | |
d17e0c6e JB |
4776 | BFD_ASSERT (h != NULL); |
4777 | if (h != NULL | |
4778 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
48d502e1 BS |
4779 | return FALSE; |
4780 | break; | |
4781 | ||
4782 | case R_huimm16: | |
4783 | case R_luimm16: | |
4784 | case R_pcrel12_jump_s: | |
4785 | case R_pcrel10: | |
4786 | break; | |
4787 | ||
4788 | default: | |
4789 | bad_reloc: | |
4790 | (*_bfd_error_handler) | |
4791 | (_("%B: unsupported relocation type %i"), | |
4792 | abfd, ELF32_R_TYPE (rel->r_info)); | |
4793 | return FALSE; | |
4794 | } | |
0f64bb02 CM |
4795 | } |
4796 | ||
4797 | return TRUE; | |
4798 | } | |
4799 | ||
48d502e1 BS |
4800 | /* Set the right machine number for a Blackfin ELF file. */ |
4801 | ||
4802 | static bfd_boolean | |
4803 | elf32_bfin_object_p (bfd *abfd) | |
4804 | { | |
4805 | bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0); | |
4806 | return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0) | |
4807 | == (IS_FDPIC (abfd))); | |
4808 | } | |
0f64bb02 | 4809 | |
0f64bb02 | 4810 | static bfd_boolean |
48d502e1 | 4811 | elf32_bfin_set_private_flags (bfd * abfd, flagword flags) |
0f64bb02 | 4812 | { |
48d502e1 BS |
4813 | elf_elfheader (abfd)->e_flags = flags; |
4814 | elf_flags_init (abfd) = TRUE; | |
4815 | return TRUE; | |
4816 | } | |
0f64bb02 | 4817 | |
48d502e1 BS |
4818 | /* Copy backend specific data from one object module to another. */ |
4819 | ||
4820 | static bfd_boolean | |
4821 | bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
4822 | { | |
0f64bb02 CM |
4823 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
4824 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
4825 | return TRUE; | |
4826 | ||
48d502e1 BS |
4827 | BFD_ASSERT (!elf_flags_init (obfd) |
4828 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
0f64bb02 | 4829 | |
48d502e1 BS |
4830 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
4831 | elf_flags_init (obfd) = TRUE; | |
104d59d1 JM |
4832 | |
4833 | /* Copy object attributes. */ | |
4834 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
4835 | ||
0f64bb02 CM |
4836 | return TRUE; |
4837 | } | |
4838 | ||
0f64bb02 | 4839 | static bfd_boolean |
48d502e1 | 4840 | elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
0f64bb02 | 4841 | { |
48d502e1 BS |
4842 | unsigned i; |
4843 | ||
4844 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
4845 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
4846 | return TRUE; | |
4847 | ||
4848 | if (! bfin_elf_copy_private_bfd_data (ibfd, obfd)) | |
4849 | return FALSE; | |
4850 | ||
4851 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr | |
4852 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) | |
4853 | return TRUE; | |
4854 | ||
4855 | /* Copy the stack size. */ | |
4856 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) | |
4857 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) | |
4858 | { | |
4859 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; | |
4860 | ||
4861 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) | |
4862 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) | |
4863 | { | |
4864 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); | |
4865 | ||
4866 | /* Rewrite the phdrs, since we're only called after they | |
4867 | were first written. */ | |
4868 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) | |
4869 | ->s->sizeof_ehdr, SEEK_SET) != 0 | |
4870 | || get_elf_backend_data (obfd)->s | |
4871 | ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, | |
4872 | elf_elfheader (obfd)->e_phnum) != 0) | |
4873 | return FALSE; | |
4874 | break; | |
4875 | } | |
4876 | ||
4877 | break; | |
4878 | } | |
4879 | ||
0f64bb02 CM |
4880 | return TRUE; |
4881 | } | |
4882 | ||
4883 | ||
4884 | /* Display the flags field. */ | |
4885 | static bfd_boolean | |
4886 | elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr) | |
4887 | { | |
4888 | FILE *file = (FILE *) ptr; | |
48d502e1 | 4889 | flagword flags; |
0f64bb02 CM |
4890 | |
4891 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
4892 | ||
4893 | /* Print normal ELF private data. */ | |
4894 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
4895 | ||
48d502e1 | 4896 | flags = elf_elfheader (abfd)->e_flags; |
0f64bb02 CM |
4897 | |
4898 | /* xgettext:c-format */ | |
4899 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
4900 | ||
48d502e1 BS |
4901 | if (flags & EF_BFIN_PIC) |
4902 | fprintf (file, " -fpic"); | |
4903 | ||
4904 | if (flags & EF_BFIN_FDPIC) | |
4905 | fprintf (file, " -mfdpic"); | |
4906 | ||
0f64bb02 CM |
4907 | fputc ('\n', file); |
4908 | ||
4909 | return TRUE; | |
4910 | } | |
4911 | ||
48d502e1 BS |
4912 | /* Merge backend specific data from an object file to the output |
4913 | object file when linking. */ | |
4914 | ||
4915 | static bfd_boolean | |
4916 | elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
4917 | { | |
7a84e3da | 4918 | flagword old_flags, new_flags; |
48d502e1 BS |
4919 | bfd_boolean error = FALSE; |
4920 | ||
4921 | new_flags = elf_elfheader (ibfd)->e_flags; | |
4922 | old_flags = elf_elfheader (obfd)->e_flags; | |
4923 | ||
4924 | if (new_flags & EF_BFIN_FDPIC) | |
4925 | new_flags &= ~EF_BFIN_PIC; | |
4926 | ||
4927 | #ifdef DEBUG | |
4928 | (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s", | |
4929 | old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", | |
4930 | bfd_get_filename (ibfd)); | |
4931 | #endif | |
4932 | ||
4933 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
4934 | { | |
4935 | elf_flags_init (obfd) = TRUE; | |
7a84e3da | 4936 | elf_elfheader (obfd)->e_flags = new_flags; |
48d502e1 BS |
4937 | } |
4938 | ||
7a84e3da | 4939 | if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd))) |
48d502e1 BS |
4940 | { |
4941 | error = TRUE; | |
4942 | if (IS_FDPIC (obfd)) | |
4943 | (*_bfd_error_handler) | |
4944 | (_("%s: cannot link non-fdpic object file into fdpic executable"), | |
4945 | bfd_get_filename (ibfd)); | |
4946 | else | |
4947 | (*_bfd_error_handler) | |
4948 | (_("%s: cannot link fdpic object file into non-fdpic executable"), | |
4949 | bfd_get_filename (ibfd)); | |
4950 | } | |
4951 | ||
4952 | if (error) | |
4953 | bfd_set_error (bfd_error_bad_value); | |
4954 | ||
4955 | return !error; | |
4956 | } | |
4957 | \f | |
0f64bb02 CM |
4958 | /* bfin ELF linker hash entry. */ |
4959 | ||
4960 | struct bfin_link_hash_entry | |
4961 | { | |
4962 | struct elf_link_hash_entry root; | |
4963 | ||
4964 | /* Number of PC relative relocs copied for this symbol. */ | |
4965 | struct bfin_pcrel_relocs_copied *pcrel_relocs_copied; | |
4966 | }; | |
4967 | ||
4968 | /* bfin ELF linker hash table. */ | |
4969 | ||
4970 | struct bfin_link_hash_table | |
4971 | { | |
4972 | struct elf_link_hash_table root; | |
4973 | ||
4974 | /* Small local sym to section mapping cache. */ | |
4975 | struct sym_sec_cache sym_sec; | |
4976 | }; | |
4977 | ||
4978 | #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent)) | |
4979 | ||
4980 | static struct bfd_hash_entry * | |
4981 | bfin_link_hash_newfunc (struct bfd_hash_entry *entry, | |
48d502e1 | 4982 | struct bfd_hash_table *table, const char *string) |
0f64bb02 CM |
4983 | { |
4984 | struct bfd_hash_entry *ret = entry; | |
4985 | ||
4986 | /* Allocate the structure if it has not already been allocated by a | |
4987 | subclass. */ | |
4988 | if (ret == NULL) | |
4989 | ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry)); | |
4990 | if (ret == NULL) | |
4991 | return ret; | |
4992 | ||
4993 | /* Call the allocation method of the superclass. */ | |
4994 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); | |
4995 | if (ret != NULL) | |
4996 | bfin_hash_entry (ret)->pcrel_relocs_copied = NULL; | |
4997 | ||
4998 | return ret; | |
4999 | } | |
5000 | ||
5001 | /* Create an bfin ELF linker hash table. */ | |
5002 | ||
5003 | static struct bfd_link_hash_table * | |
5004 | bfin_link_hash_table_create (bfd * abfd) | |
5005 | { | |
5006 | struct bfin_link_hash_table *ret; | |
5007 | bfd_size_type amt = sizeof (struct bfin_link_hash_table); | |
5008 | ||
48d502e1 BS |
5009 | ret = bfd_zalloc (abfd, amt); |
5010 | if (ret == NULL) | |
0f64bb02 CM |
5011 | return NULL; |
5012 | ||
5013 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
66eb6687 | 5014 | bfin_link_hash_newfunc, |
48d502e1 | 5015 | sizeof (struct elf_link_hash_entry))) |
0f64bb02 CM |
5016 | { |
5017 | free (ret); | |
5018 | return NULL; | |
5019 | } | |
5020 | ||
5021 | ret->sym_sec.abfd = NULL; | |
5022 | ||
5023 | return &ret->root.root; | |
5024 | } | |
5025 | ||
5026 | /* The size in bytes of an entry in the procedure linkage table. */ | |
5027 | ||
5028 | /* Finish up the dynamic sections. */ | |
5029 | ||
5030 | static bfd_boolean | |
5031 | bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, | |
5032 | struct bfd_link_info *info) | |
5033 | { | |
5034 | bfd *dynobj; | |
5035 | asection *sdyn; | |
5036 | ||
5037 | dynobj = elf_hash_table (info)->dynobj; | |
5038 | ||
5039 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5040 | ||
5041 | if (elf_hash_table (info)->dynamic_sections_created) | |
5042 | { | |
5043 | Elf32_External_Dyn *dyncon, *dynconend; | |
5044 | ||
5045 | BFD_ASSERT (sdyn != NULL); | |
5046 | ||
5047 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
5048 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
5049 | for (; dyncon < dynconend; dyncon++) | |
5050 | { | |
5051 | Elf_Internal_Dyn dyn; | |
5052 | ||
5053 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5054 | ||
5055 | } | |
5056 | ||
5057 | } | |
5058 | return TRUE; | |
5059 | } | |
5060 | ||
5061 | /* Finish up dynamic symbol handling. We set the contents of various | |
5062 | dynamic sections here. */ | |
5063 | ||
5064 | static bfd_boolean | |
5065 | bfin_finish_dynamic_symbol (bfd * output_bfd, | |
5066 | struct bfd_link_info *info, | |
5067 | struct elf_link_hash_entry *h, | |
5068 | Elf_Internal_Sym * sym) | |
5069 | { | |
5070 | bfd *dynobj; | |
5071 | ||
5072 | dynobj = elf_hash_table (info)->dynobj; | |
5073 | ||
5074 | if (h->got.offset != (bfd_vma) - 1) | |
5075 | { | |
5076 | asection *sgot; | |
5077 | asection *srela; | |
5078 | Elf_Internal_Rela rela; | |
5079 | bfd_byte *loc; | |
5080 | ||
5081 | /* This symbol has an entry in the global offset table. | |
5082 | Set it up. */ | |
5083 | ||
5084 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
5085 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
5086 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
5087 | ||
5088 | rela.r_offset = (sgot->output_section->vma | |
5089 | + sgot->output_offset | |
5090 | + (h->got.offset & ~(bfd_vma) 1)); | |
5091 | ||
5092 | /* If this is a -Bsymbolic link, and the symbol is defined | |
5093 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
5094 | the symbol was forced to be local because of a version file. | |
5095 | The entry in the global offset table will already have been | |
5096 | initialized in the relocate_section function. */ | |
5097 | if (info->shared | |
5098 | && (info->symbolic | |
5099 | || h->dynindx == -1 || h->forced_local) && h->def_regular) | |
5100 | { | |
5592d7ec | 5101 | fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__); |
0f64bb02 CM |
5102 | rela.r_info = ELF32_R_INFO (0, R_pcrel24); |
5103 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
5104 | (sgot->contents | |
5105 | + | |
5106 | (h->got. | |
5107 | offset & ~(bfd_vma) 1))); | |
5108 | } | |
5109 | else | |
5110 | { | |
5111 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
5112 | sgot->contents + (h->got.offset & ~(bfd_vma) 1)); | |
5113 | rela.r_info = ELF32_R_INFO (h->dynindx, R_got); | |
5114 | rela.r_addend = 0; | |
5115 | } | |
5116 | ||
5117 | loc = srela->contents; | |
5118 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
5119 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
5120 | } | |
5121 | ||
5122 | if (h->needs_copy) | |
5123 | { | |
5124 | BFD_ASSERT (0); | |
5125 | } | |
5126 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
5592d7ec | 5127 | if (strcmp (h->root.root.string, "__DYNAMIC") == 0 |
22edb2f1 | 5128 | || h == elf_hash_table (info)->hgot) |
0f64bb02 CM |
5129 | sym->st_shndx = SHN_ABS; |
5130 | ||
5131 | return TRUE; | |
5132 | } | |
5133 | ||
5134 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
5135 | regular object. The current definition is in some section of the | |
5136 | dynamic object, but we're not including those sections. We have to | |
5137 | change the definition to something the rest of the link can | |
5138 | understand. */ | |
5139 | ||
5140 | static bfd_boolean | |
5141 | bfin_adjust_dynamic_symbol (struct bfd_link_info *info, | |
5142 | struct elf_link_hash_entry *h) | |
5143 | { | |
5144 | bfd *dynobj; | |
5145 | asection *s; | |
5146 | unsigned int power_of_two; | |
5147 | ||
5148 | dynobj = elf_hash_table (info)->dynobj; | |
5149 | ||
5150 | /* Make sure we know what is going on here. */ | |
5151 | BFD_ASSERT (dynobj != NULL | |
5152 | && (h->needs_plt | |
5153 | || h->u.weakdef != NULL | |
5154 | || (h->def_dynamic && h->ref_regular && !h->def_regular))); | |
5155 | ||
5156 | /* If this is a function, put it in the procedure linkage table. We | |
5157 | will fill in the contents of the procedure linkage table later, | |
5158 | when we know the address of the .got section. */ | |
5159 | if (h->type == STT_FUNC || h->needs_plt) | |
5160 | { | |
5161 | BFD_ASSERT(0); | |
5162 | } | |
5163 | ||
5164 | /* If this is a weak symbol, and there is a real definition, the | |
5165 | processor independent code will have arranged for us to see the | |
5166 | real definition first, and we can just use the same value. */ | |
5167 | if (h->u.weakdef != NULL) | |
5168 | { | |
5169 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
5170 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
5171 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
5172 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
5173 | return TRUE; | |
5174 | } | |
5175 | ||
5176 | /* This is a reference to a symbol defined by a dynamic object which | |
5177 | is not a function. */ | |
5178 | ||
5179 | /* If we are creating a shared library, we must presume that the | |
5180 | only references to the symbol are via the global offset table. | |
5181 | For such cases we need not do anything here; the relocations will | |
5182 | be handled correctly by relocate_section. */ | |
5183 | if (info->shared) | |
5184 | return TRUE; | |
5185 | ||
5186 | /* We must allocate the symbol in our .dynbss section, which will | |
5187 | become part of the .bss section of the executable. There will be | |
5188 | an entry for this symbol in the .dynsym section. The dynamic | |
5189 | object will contain position independent code, so all references | |
5190 | from the dynamic object to this symbol will go through the global | |
5191 | offset table. The dynamic linker will use the .dynsym entry to | |
5192 | determine the address it must put in the global offset table, so | |
5193 | both the dynamic object and the regular object will refer to the | |
5194 | same memory location for the variable. */ | |
5195 | ||
5196 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
5197 | BFD_ASSERT (s != NULL); | |
5198 | ||
5199 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
5200 | copy the initial value out of the dynamic object and into the | |
5201 | runtime process image. We need to remember the offset into the | |
5202 | .rela.bss section we are going to use. */ | |
5203 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
5204 | { | |
5205 | asection *srel; | |
5206 | ||
5207 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
5208 | BFD_ASSERT (srel != NULL); | |
5209 | srel->size += sizeof (Elf32_External_Rela); | |
5210 | h->needs_copy = 1; | |
5211 | } | |
5212 | ||
5213 | /* We need to figure out the alignment required for this symbol. I | |
5214 | have no idea how ELF linkers handle this. */ | |
5215 | power_of_two = bfd_log2 (h->size); | |
5216 | if (power_of_two > 3) | |
5217 | power_of_two = 3; | |
5218 | ||
5219 | /* Apply the required alignment. */ | |
5220 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); | |
5221 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
5222 | { | |
5223 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
5224 | return FALSE; | |
5225 | } | |
5226 | ||
5227 | /* Define the symbol as being at this point in the section. */ | |
5228 | h->root.u.def.section = s; | |
5229 | h->root.u.def.value = s->size; | |
5230 | ||
5231 | /* Increment the section size to make room for the symbol. */ | |
5232 | s->size += h->size; | |
5233 | ||
5234 | return TRUE; | |
5235 | } | |
5236 | ||
5237 | /* The bfin linker needs to keep track of the number of relocs that it | |
5238 | decides to copy in check_relocs for each symbol. This is so that it | |
5239 | can discard PC relative relocs if it doesn't need them when linking | |
5240 | with -Bsymbolic. We store the information in a field extending the | |
5241 | regular ELF linker hash table. */ | |
5242 | ||
5243 | /* This structure keeps track of the number of PC relative relocs we have | |
5244 | copied for a given symbol. */ | |
5245 | ||
5246 | struct bfin_pcrel_relocs_copied | |
5247 | { | |
5248 | /* Next section. */ | |
5249 | struct bfin_pcrel_relocs_copied *next; | |
5250 | /* A section in dynobj. */ | |
5251 | asection *section; | |
5252 | /* Number of relocs copied in this section. */ | |
5253 | bfd_size_type count; | |
5254 | }; | |
5255 | ||
5256 | /* This function is called via elf_link_hash_traverse if we are | |
5257 | creating a shared object. In the -Bsymbolic case it discards the | |
5258 | space allocated to copy PC relative relocs against symbols which | |
5259 | are defined in regular objects. For the normal shared case, it | |
5260 | discards space for pc-relative relocs that have become local due to | |
5261 | symbol visibility changes. We allocated space for them in the | |
5262 | check_relocs routine, but we won't fill them in in the | |
5263 | relocate_section routine. | |
5264 | ||
5265 | We also check whether any of the remaining relocations apply | |
5266 | against a readonly section, and set the DF_TEXTREL flag in this | |
5267 | case. */ | |
5268 | ||
5269 | static bfd_boolean | |
5270 | bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf) | |
5271 | { | |
5272 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5273 | struct bfin_pcrel_relocs_copied *s; | |
5274 | ||
5275 | if (h->root.type == bfd_link_hash_warning) | |
5276 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5277 | ||
5278 | if (!h->def_regular || (!info->symbolic && !h->forced_local)) | |
5279 | { | |
5280 | if ((info->flags & DF_TEXTREL) == 0) | |
5281 | { | |
5282 | /* Look for relocations against read-only sections. */ | |
5283 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; | |
5284 | s != NULL; s = s->next) | |
5285 | if ((s->section->flags & SEC_READONLY) != 0) | |
5286 | { | |
5287 | info->flags |= DF_TEXTREL; | |
5288 | break; | |
5289 | } | |
5290 | } | |
5291 | ||
5292 | return TRUE; | |
5293 | } | |
5294 | ||
5295 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; | |
5296 | s != NULL; s = s->next) | |
5297 | s->section->size -= s->count * sizeof (Elf32_External_Rela); | |
5298 | ||
5299 | return TRUE; | |
5300 | } | |
5301 | ||
0f64bb02 CM |
5302 | static bfd_boolean |
5303 | bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, | |
5304 | struct bfd_link_info *info) | |
5305 | { | |
5306 | bfd *dynobj; | |
5307 | asection *s; | |
5308 | bfd_boolean relocs; | |
5309 | ||
5310 | dynobj = elf_hash_table (info)->dynobj; | |
5311 | BFD_ASSERT (dynobj != NULL); | |
5312 | ||
5313 | if (elf_hash_table (info)->dynamic_sections_created) | |
5314 | { | |
5315 | /* Set the contents of the .interp section to the interpreter. */ | |
5316 | if (info->executable) | |
5317 | { | |
5318 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
5319 | BFD_ASSERT (s != NULL); | |
5320 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
5321 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
5322 | } | |
5323 | } | |
5324 | else | |
5325 | { | |
5326 | /* We may have created entries in the .rela.got section. | |
5327 | However, if we are not creating the dynamic sections, we will | |
5328 | not actually use these entries. Reset the size of .rela.got, | |
5329 | which will cause it to get stripped from the output file | |
5330 | below. */ | |
5331 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
5332 | if (s != NULL) | |
5333 | s->size = 0; | |
5334 | } | |
5335 | ||
5336 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
5337 | PC relative relocs against symbols defined in a regular object. | |
5338 | For the normal shared case we discard the PC relative relocs | |
5339 | against symbols that have become local due to visibility changes. | |
5340 | We allocated space for them in the check_relocs routine, but we | |
5341 | will not fill them in in the relocate_section routine. */ | |
5342 | if (info->shared) | |
5343 | elf_link_hash_traverse (elf_hash_table (info), | |
5344 | bfin_discard_copies, (PTR) info); | |
5345 | ||
5346 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
5347 | determined the sizes of the various dynamic sections. Allocate | |
5348 | memory for them. */ | |
5349 | relocs = FALSE; | |
5350 | for (s = dynobj->sections; s != NULL; s = s->next) | |
5351 | { | |
5352 | const char *name; | |
5353 | bfd_boolean strip; | |
5354 | ||
5355 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
5356 | continue; | |
5357 | ||
5358 | /* It's OK to base decisions on the section name, because none | |
5359 | of the dynobj section names depend upon the input files. */ | |
5360 | name = bfd_get_section_name (dynobj, s); | |
5361 | ||
5362 | strip = FALSE; | |
5363 | ||
0112cd26 | 5364 | if (CONST_STRNEQ (name, ".rela")) |
0f64bb02 CM |
5365 | { |
5366 | if (s->size == 0) | |
5367 | { | |
5368 | /* If we don't need this section, strip it from the | |
5369 | output file. This is mostly to handle .rela.bss and | |
5370 | .rela.plt. We must create both sections in | |
5371 | create_dynamic_sections, because they must be created | |
5372 | before the linker maps input sections to output | |
5373 | sections. The linker does that before | |
5374 | adjust_dynamic_symbol is called, and it is that | |
5375 | function which decides whether anything needs to go | |
5376 | into these sections. */ | |
5377 | strip = TRUE; | |
5378 | } | |
5379 | else | |
5380 | { | |
5381 | relocs = TRUE; | |
5382 | ||
5383 | /* We use the reloc_count field as a counter if we need | |
5384 | to copy relocs into the output file. */ | |
5385 | s->reloc_count = 0; | |
5386 | } | |
5387 | } | |
0112cd26 | 5388 | else if (! CONST_STRNEQ (name, ".got")) |
0f64bb02 CM |
5389 | { |
5390 | /* It's not one of our sections, so don't allocate space. */ | |
5391 | continue; | |
5392 | } | |
5393 | ||
5394 | if (strip) | |
5395 | { | |
5396 | s->flags |= SEC_EXCLUDE; | |
5397 | continue; | |
5398 | } | |
5399 | ||
5400 | /* Allocate memory for the section contents. */ | |
5401 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. | |
5402 | Unused entries should be reclaimed before the section's contents | |
5403 | are written out, but at the moment this does not happen. Thus in | |
5404 | order to prevent writing out garbage, we initialise the section's | |
5405 | contents to zero. */ | |
5406 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
5407 | if (s->contents == NULL && s->size != 0) | |
5408 | return FALSE; | |
5409 | } | |
5410 | ||
5411 | if (elf_hash_table (info)->dynamic_sections_created) | |
5412 | { | |
5413 | /* Add some entries to the .dynamic section. We fill in the | |
5414 | values later, in bfin_finish_dynamic_sections, but we | |
5415 | must add the entries now so that we get the correct size for | |
5416 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
5417 | dynamic linker and used by the debugger. */ | |
5418 | #define add_dynamic_entry(TAG, VAL) \ | |
5419 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
5420 | ||
5421 | if (!info->shared) | |
5422 | { | |
5423 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
5424 | return FALSE; | |
5425 | } | |
5426 | ||
5427 | ||
5428 | if (relocs) | |
5429 | { | |
5430 | if (!add_dynamic_entry (DT_RELA, 0) | |
5431 | || !add_dynamic_entry (DT_RELASZ, 0) | |
5432 | || !add_dynamic_entry (DT_RELAENT, | |
5433 | sizeof (Elf32_External_Rela))) | |
5434 | return FALSE; | |
5435 | } | |
5436 | ||
5437 | if ((info->flags & DF_TEXTREL) != 0) | |
5438 | { | |
5439 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
5440 | return FALSE; | |
5441 | } | |
5442 | } | |
5443 | #undef add_dynamic_entry | |
5444 | ||
5445 | return TRUE; | |
5446 | } | |
48d502e1 | 5447 | \f |
0f64bb02 CM |
5448 | /* Given a .data section and a .emreloc in-memory section, store |
5449 | relocation information into the .emreloc section which can be | |
5450 | used at runtime to relocate the section. This is called by the | |
5451 | linker when the --embedded-relocs switch is used. This is called | |
5452 | after the add_symbols entry point has been called for all the | |
5453 | objects, and before the final_link entry point is called. */ | |
5454 | ||
3b55e94a BS |
5455 | bfd_boolean bfd_bfin_elf32_create_embedded_relocs |
5456 | PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **)); | |
5457 | ||
0f64bb02 CM |
5458 | bfd_boolean |
5459 | bfd_bfin_elf32_create_embedded_relocs ( | |
5460 | bfd *abfd, | |
5461 | struct bfd_link_info *info, | |
5462 | asection *datasec, | |
5463 | asection *relsec, | |
5464 | char **errmsg) | |
5465 | { | |
5466 | Elf_Internal_Shdr *symtab_hdr; | |
5467 | Elf_Internal_Sym *isymbuf = NULL; | |
5468 | Elf_Internal_Rela *internal_relocs = NULL; | |
5469 | Elf_Internal_Rela *irel, *irelend; | |
5470 | bfd_byte *p; | |
5471 | bfd_size_type amt; | |
5472 | ||
5473 | BFD_ASSERT (! info->relocatable); | |
5474 | ||
5475 | *errmsg = NULL; | |
5476 | ||
5477 | if (datasec->reloc_count == 0) | |
5478 | return TRUE; | |
5479 | ||
5480 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5481 | ||
5482 | /* Get a copy of the native relocations. */ | |
5483 | internal_relocs = (_bfd_elf_link_read_relocs | |
5484 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
5485 | info->keep_memory)); | |
5486 | if (internal_relocs == NULL) | |
5487 | goto error_return; | |
5488 | ||
5489 | amt = (bfd_size_type) datasec->reloc_count * 12; | |
5490 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
5491 | if (relsec->contents == NULL) | |
5492 | goto error_return; | |
5493 | ||
5494 | p = relsec->contents; | |
5495 | ||
5496 | irelend = internal_relocs + datasec->reloc_count; | |
5497 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
5498 | { | |
5499 | asection *targetsec; | |
5500 | ||
5501 | /* We are going to write a four byte longword into the runtime | |
5502 | reloc section. The longword will be the address in the data | |
5503 | section which must be relocated. It is followed by the name | |
5504 | of the target section NUL-padded or truncated to 8 | |
5505 | characters. */ | |
5506 | ||
5507 | /* We can only relocate absolute longword relocs at run time. */ | |
5508 | if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data) | |
5509 | { | |
5510 | *errmsg = _("unsupported reloc type"); | |
5511 | bfd_set_error (bfd_error_bad_value); | |
5512 | goto error_return; | |
5513 | } | |
5514 | ||
5515 | /* Get the target section referred to by the reloc. */ | |
5516 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
5517 | { | |
5518 | /* A local symbol. */ | |
5519 | Elf_Internal_Sym *isym; | |
5520 | ||
5521 | /* Read this BFD's local symbols if we haven't done so already. */ | |
5522 | if (isymbuf == NULL) | |
5523 | { | |
5524 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
5525 | if (isymbuf == NULL) | |
5526 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
5527 | symtab_hdr->sh_info, 0, | |
5528 | NULL, NULL, NULL); | |
5529 | if (isymbuf == NULL) | |
5530 | goto error_return; | |
5531 | } | |
5532 | ||
5533 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
5534 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
5535 | } | |
5536 | else | |
5537 | { | |
5538 | unsigned long indx; | |
5539 | struct elf_link_hash_entry *h; | |
5540 | ||
5541 | /* An external symbol. */ | |
5542 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
5543 | h = elf_sym_hashes (abfd)[indx]; | |
5544 | BFD_ASSERT (h != NULL); | |
5545 | if (h->root.type == bfd_link_hash_defined | |
5546 | || h->root.type == bfd_link_hash_defweak) | |
5547 | targetsec = h->root.u.def.section; | |
5548 | else | |
5549 | targetsec = NULL; | |
5550 | } | |
5551 | ||
5552 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
5553 | memset (p + 4, 0, 8); | |
5554 | if (targetsec != NULL) | |
9ba4c445 | 5555 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
0f64bb02 CM |
5556 | } |
5557 | ||
5558 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
5559 | free (isymbuf); | |
5560 | if (internal_relocs != NULL | |
5561 | && elf_section_data (datasec)->relocs != internal_relocs) | |
5562 | free (internal_relocs); | |
5563 | return TRUE; | |
5564 | ||
5565 | error_return: | |
5566 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
5567 | free (isymbuf); | |
5568 | if (internal_relocs != NULL | |
5569 | && elf_section_data (datasec)->relocs != internal_relocs) | |
5570 | free (internal_relocs); | |
5571 | return FALSE; | |
5572 | } | |
b0a0b978 JZ |
5573 | |
5574 | struct bfd_elf_special_section const elf32_bfin_special_sections[] = | |
5575 | { | |
5576 | { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
5577 | { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
5578 | { NULL, 0, 0, 0, 0 } | |
5579 | }; | |
5580 | ||
48d502e1 | 5581 | \f |
0f64bb02 CM |
5582 | #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec |
5583 | #define TARGET_LITTLE_NAME "elf32-bfin" | |
5584 | #define ELF_ARCH bfd_arch_bfin | |
3b55e94a | 5585 | #define ELF_MACHINE_CODE EM_BLACKFIN |
0f64bb02 CM |
5586 | #define ELF_MAXPAGESIZE 0x1000 |
5587 | #define elf_symbol_leading_char '_' | |
5588 | ||
5589 | #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup | |
157090f7 AM |
5590 | #define bfd_elf32_bfd_reloc_name_lookup \ |
5591 | bfin_bfd_reloc_name_lookup | |
0f64bb02 CM |
5592 | #define elf_info_to_howto bfin_info_to_howto |
5593 | #define elf_info_to_howto_rel 0 | |
48d502e1 | 5594 | #define elf_backend_object_p elf32_bfin_object_p |
0f64bb02 CM |
5595 | |
5596 | #define bfd_elf32_bfd_is_local_label_name \ | |
5597 | bfin_is_local_label_name | |
5598 | #define bfin_hash_table(p) \ | |
5599 | ((struct bfin_link_hash_table *) (p)->hash) | |
5600 | ||
5601 | ||
5602 | ||
5603 | #define elf_backend_create_dynamic_sections \ | |
5604 | _bfd_elf_create_dynamic_sections | |
5605 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5606 | bfin_link_hash_table_create | |
5607 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link | |
5608 | ||
48d502e1 | 5609 | #define elf_backend_check_relocs bfin_check_relocs |
0f64bb02 CM |
5610 | #define elf_backend_adjust_dynamic_symbol \ |
5611 | bfin_adjust_dynamic_symbol | |
5612 | #define elf_backend_size_dynamic_sections \ | |
5613 | bfin_size_dynamic_sections | |
5614 | #define elf_backend_relocate_section bfin_relocate_section | |
5615 | #define elf_backend_finish_dynamic_symbol \ | |
5616 | bfin_finish_dynamic_symbol | |
5617 | #define elf_backend_finish_dynamic_sections \ | |
5618 | bfin_finish_dynamic_sections | |
5619 | #define elf_backend_gc_mark_hook bfin_gc_mark_hook | |
5620 | #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook | |
5621 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
5622 | elf32_bfin_merge_private_bfd_data | |
5623 | #define bfd_elf32_bfd_set_private_flags \ | |
5624 | elf32_bfin_set_private_flags | |
5625 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
5626 | elf32_bfin_print_private_bfd_data | |
5627 | #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class | |
5628 | #define elf_backend_can_gc_sections 1 | |
b0a0b978 | 5629 | #define elf_backend_special_sections elf32_bfin_special_sections |
0f64bb02 CM |
5630 | #define elf_backend_can_refcount 1 |
5631 | #define elf_backend_want_got_plt 0 | |
5632 | #define elf_backend_plt_readonly 1 | |
5633 | #define elf_backend_want_plt_sym 0 | |
5634 | #define elf_backend_got_header_size 12 | |
5635 | #define elf_backend_rela_normal 1 | |
5636 | ||
48d502e1 BS |
5637 | #include "elf32-target.h" |
5638 | ||
5639 | #undef TARGET_LITTLE_SYM | |
5640 | #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec | |
5641 | #undef TARGET_LITTLE_NAME | |
5642 | #define TARGET_LITTLE_NAME "elf32-bfinfdpic" | |
5643 | #undef elf32_bed | |
5644 | #define elf32_bed elf32_bfinfdpic_bed | |
5645 | ||
5646 | #undef elf_backend_gc_sweep_hook | |
2774f1a6 | 5647 | #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook |
48d502e1 BS |
5648 | |
5649 | #undef elf_backend_got_header_size | |
5650 | #define elf_backend_got_header_size 0 | |
5651 | ||
5652 | #undef elf_backend_relocate_section | |
5653 | #define elf_backend_relocate_section bfinfdpic_relocate_section | |
5654 | #undef elf_backend_check_relocs | |
5655 | #define elf_backend_check_relocs bfinfdpic_check_relocs | |
5656 | ||
5657 | #undef bfd_elf32_bfd_link_hash_table_create | |
5658 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5659 | bfinfdpic_elf_link_hash_table_create | |
5660 | #undef elf_backend_always_size_sections | |
5661 | #define elf_backend_always_size_sections \ | |
5662 | elf32_bfinfdpic_always_size_sections | |
e36284ab AM |
5663 | #undef elf_backend_modify_program_headers |
5664 | #define elf_backend_modify_program_headers \ | |
5665 | elf32_bfinfdpic_modify_program_headers | |
48d502e1 BS |
5666 | #undef bfd_elf32_bfd_copy_private_bfd_data |
5667 | #define bfd_elf32_bfd_copy_private_bfd_data \ | |
5668 | elf32_bfinfdpic_copy_private_bfd_data | |
5669 | ||
5670 | #undef elf_backend_create_dynamic_sections | |
5671 | #define elf_backend_create_dynamic_sections \ | |
5672 | elf32_bfinfdpic_create_dynamic_sections | |
5673 | #undef elf_backend_adjust_dynamic_symbol | |
5674 | #define elf_backend_adjust_dynamic_symbol \ | |
5675 | elf32_bfinfdpic_adjust_dynamic_symbol | |
5676 | #undef elf_backend_size_dynamic_sections | |
5677 | #define elf_backend_size_dynamic_sections \ | |
5678 | elf32_bfinfdpic_size_dynamic_sections | |
5679 | #undef elf_backend_finish_dynamic_symbol | |
5680 | #define elf_backend_finish_dynamic_symbol \ | |
5681 | elf32_bfinfdpic_finish_dynamic_symbol | |
5682 | #undef elf_backend_finish_dynamic_sections | |
5683 | #define elf_backend_finish_dynamic_sections \ | |
5684 | elf32_bfinfdpic_finish_dynamic_sections | |
5685 | ||
5686 | #undef elf_backend_can_make_relative_eh_frame | |
5687 | #define elf_backend_can_make_relative_eh_frame \ | |
5688 | bfinfdpic_elf_use_relative_eh_frame | |
5689 | #undef elf_backend_can_make_lsda_relative_eh_frame | |
5690 | #define elf_backend_can_make_lsda_relative_eh_frame \ | |
5691 | bfinfdpic_elf_use_relative_eh_frame | |
5692 | #undef elf_backend_encode_eh_address | |
5693 | #define elf_backend_encode_eh_address \ | |
5694 | bfinfdpic_elf_encode_eh_address | |
5695 | ||
5696 | #undef elf_backend_may_use_rel_p | |
5697 | #define elf_backend_may_use_rel_p 1 | |
5698 | #undef elf_backend_may_use_rela_p | |
5699 | #define elf_backend_may_use_rela_p 1 | |
5700 | /* We use REL for dynamic relocations only. */ | |
5701 | #undef elf_backend_default_use_rela_p | |
5702 | #define elf_backend_default_use_rela_p 1 | |
5703 | ||
5704 | #undef elf_backend_omit_section_dynsym | |
5705 | #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym | |
0f64bb02 CM |
5706 | |
5707 | #include "elf32-target.h" |