elf32-sh.c revision 1.1.1.10 1 /* Renesas / SuperH SH specific support for 32-bit ELF
2 Copyright (C) 1996-2024 Free Software Foundation, Inc.
3 Contributed by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf-vxworks.h"
28 #include "elf/sh.h"
29 #include "dwarf2.h"
30 #include "libiberty.h"
31 #include "../opcodes/sh-opc.h"
32
33 /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
34 #define OCTETS_PER_BYTE(ABFD, SEC) 1
35
36 static bfd_reloc_status_type sh_elf_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type sh_elf_ignore_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bool sh_elf_relax_delete_bytes
41 (bfd *, asection *, bfd_vma, int);
42 static bool sh_elf_align_loads
43 (bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bool *);
44 static bool sh_elf_swap_insns
45 (bfd *, asection *, void *, bfd_byte *, bfd_vma);
46 static int sh_elf_optimized_tls_reloc
47 (struct bfd_link_info *, int, int);
48 static bfd_vma dtpoff_base
49 (struct bfd_link_info *);
50 static bfd_vma tpoff
51 (struct bfd_link_info *, bfd_vma);
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55
56 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
57
58 /* FDPIC binaries have a default 128K stack. */
59 #define DEFAULT_STACK_SIZE 0x20000
60
61 #define MINUS_ONE ((bfd_vma) 0 - 1)
62
63 /* Decide whether a reference to a symbol can be resolved locally or
64 not. If the symbol is protected, we want the local address, but
65 its function descriptor must be assigned by the dynamic linker. */
66 #define SYMBOL_FUNCDESC_LOCAL(INFO, H) \
67 (SYMBOL_REFERENCES_LOCAL (INFO, H) \
68 || ! elf_hash_table (INFO)->dynamic_sections_created)
69
70 #define SH_PARTIAL32 true
72 #define SH_SRC_MASK32 0xffffffff
73 #define SH_ELF_RELOC sh_elf_reloc
74 static reloc_howto_type sh_elf_howto_table[] =
75 {
76 #include "elf32-sh-relocs.h"
77 };
78
79 #define SH_PARTIAL32 false
80 #define SH_SRC_MASK32 0
81 #define SH_ELF_RELOC bfd_elf_generic_reloc
82 static reloc_howto_type sh_vxworks_howto_table[] =
83 {
84 #include "elf32-sh-relocs.h"
85 };
86
87 /* Return true if OUTPUT_BFD is a VxWorks object. */
89
90 static bool
91 vxworks_object_p (bfd *abfd ATTRIBUTE_UNUSED)
92 {
93 #if !defined SH_TARGET_ALREADY_DEFINED
94 extern const bfd_target sh_elf32_vxworks_le_vec;
95 extern const bfd_target sh_elf32_vxworks_vec;
96
97 return (abfd->xvec == &sh_elf32_vxworks_le_vec
98 || abfd->xvec == &sh_elf32_vxworks_vec);
99 #else
100 return false;
101 #endif
102 }
103
104 /* Return true if OUTPUT_BFD is an FDPIC object. */
105
106 static bool
107 fdpic_object_p (bfd *abfd ATTRIBUTE_UNUSED)
108 {
109 #if !defined SH_TARGET_ALREADY_DEFINED
110 extern const bfd_target sh_elf32_fdpic_le_vec;
111 extern const bfd_target sh_elf32_fdpic_be_vec;
112
113 return (abfd->xvec == &sh_elf32_fdpic_le_vec
114 || abfd->xvec == &sh_elf32_fdpic_be_vec);
115 #else
116 return false;
117 #endif
118 }
119
120 /* Return the howto table for ABFD. */
121
122 static reloc_howto_type *
123 get_howto_table (bfd *abfd)
124 {
125 if (vxworks_object_p (abfd))
126 return sh_vxworks_howto_table;
127 return sh_elf_howto_table;
128 }
129
130 static bfd_reloc_status_type
131 sh_elf_reloc_loop (int r_type ATTRIBUTE_UNUSED, bfd *input_bfd,
132 asection *input_section, bfd_byte *contents,
133 bfd_vma addr, asection *symbol_section,
134 bfd_vma start, bfd_vma end)
135 {
136 static bfd_vma last_addr;
137 static asection *last_symbol_section;
138 bfd_byte *start_ptr, *ptr, *last_ptr;
139 int diff, cum_diff;
140 bfd_signed_vma x;
141 int insn;
142
143 /* Sanity check the address. */
144 if (addr > bfd_get_section_limit (input_bfd, input_section))
145 return bfd_reloc_outofrange;
146
147 /* We require the start and end relocations to be processed consecutively -
148 although we allow then to be processed forwards or backwards. */
149 if (! last_addr)
150 {
151 last_addr = addr;
152 last_symbol_section = symbol_section;
153 return bfd_reloc_ok;
154 }
155 if (last_addr != addr)
156 abort ();
157 last_addr = 0;
158
159 if (! symbol_section || last_symbol_section != symbol_section || end < start)
160 return bfd_reloc_outofrange;
161
162 /* Get the symbol_section contents. */
163 if (symbol_section != input_section)
164 {
165 if (elf_section_data (symbol_section)->this_hdr.contents != NULL)
166 contents = elf_section_data (symbol_section)->this_hdr.contents;
167 else
168 {
169 if (!bfd_malloc_and_get_section (input_bfd, symbol_section,
170 &contents))
171 {
172 free (contents);
173 return bfd_reloc_outofrange;
174 }
175 }
176 }
177 #define IS_PPI(PTR) ((bfd_get_16 (input_bfd, (PTR)) & 0xfc00) == 0xf800)
178 start_ptr = contents + start;
179 for (cum_diff = -6, ptr = contents + end; cum_diff < 0 && ptr > start_ptr;)
180 {
181 for (last_ptr = ptr, ptr -= 4; ptr >= start_ptr && IS_PPI (ptr);)
182 ptr -= 2;
183 ptr += 2;
184 diff = (last_ptr - ptr) >> 1;
185 cum_diff += diff & 1;
186 cum_diff += diff;
187 }
188 /* Calculate the start / end values to load into rs / re minus four -
189 so that will cancel out the four we would otherwise have to add to
190 addr to get the value to subtract in order to get relative addressing. */
191 if (cum_diff >= 0)
192 {
193 start -= 4;
194 end = (ptr + cum_diff * 2) - contents;
195 }
196 else
197 {
198 bfd_vma start0 = start - 4;
199
200 while (start0 && IS_PPI (contents + start0))
201 start0 -= 2;
202 start0 = start - 2 - ((start - start0) & 2);
203 start = start0 - cum_diff - 2;
204 end = start0;
205 }
206
207 if (elf_section_data (symbol_section)->this_hdr.contents != contents)
208 free (contents);
209
210 insn = bfd_get_16 (input_bfd, contents + addr);
211
212 x = (insn & 0x200 ? end : start) - addr;
213 if (input_section != symbol_section)
214 x += ((symbol_section->output_section->vma + symbol_section->output_offset)
215 - (input_section->output_section->vma
216 + input_section->output_offset));
217 x >>= 1;
218 if (x < -128 || x > 127)
219 return bfd_reloc_overflow;
220
221 x = (insn & ~0xff) | (x & 0xff);
222 bfd_put_16 (input_bfd, (bfd_vma) x, contents + addr);
223
224 return bfd_reloc_ok;
225 }
226
227 /* This function is used for normal relocs. This used to be like the COFF
228 function, and is almost certainly incorrect for other ELF targets. */
229
230 static bfd_reloc_status_type
231 sh_elf_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol_in,
232 void *data, asection *input_section, bfd *output_bfd,
233 char **error_message ATTRIBUTE_UNUSED)
234 {
235 bfd_vma insn;
236 bfd_vma sym_value;
237 enum elf_sh_reloc_type r_type;
238 bfd_vma addr = reloc_entry->address;
239 bfd_size_type octets = addr * OCTETS_PER_BYTE (abfd, input_section);
240 bfd_byte *hit_data = (bfd_byte *) data + octets;
241
242 r_type = (enum elf_sh_reloc_type) reloc_entry->howto->type;
243
244 if (output_bfd != NULL)
245 {
246 /* Partial linking--do nothing. */
247 reloc_entry->address += input_section->output_offset;
248 return bfd_reloc_ok;
249 }
250
251 /* Almost all relocs have to do with relaxing. If any work must be
252 done for them, it has been done in sh_relax_section. */
253 if (r_type == R_SH_IND12W && (symbol_in->flags & BSF_LOCAL) != 0)
254 return bfd_reloc_ok;
255
256 if (symbol_in != NULL
257 && bfd_is_und_section (symbol_in->section))
258 return bfd_reloc_undefined;
259
260 /* PR 17512: file: 9891ca98. */
261 if (octets + bfd_get_reloc_size (reloc_entry->howto)
262 > bfd_get_section_limit_octets (abfd, input_section))
263 return bfd_reloc_outofrange;
264
265 if (bfd_is_com_section (symbol_in->section))
266 sym_value = 0;
267 else
268 sym_value = (symbol_in->value +
269 symbol_in->section->output_section->vma +
270 symbol_in->section->output_offset);
271
272 switch (r_type)
273 {
274 case R_SH_DIR32:
275 insn = bfd_get_32 (abfd, hit_data);
276 insn += sym_value + reloc_entry->addend;
277 bfd_put_32 (abfd, insn, hit_data);
278 break;
279 case R_SH_IND12W:
280 insn = bfd_get_16 (abfd, hit_data);
281 sym_value += reloc_entry->addend;
282 sym_value -= (input_section->output_section->vma
283 + input_section->output_offset
284 + addr
285 + 4);
286 sym_value += (((insn & 0xfff) ^ 0x800) - 0x800) << 1;
287 insn = (insn & 0xf000) | ((sym_value >> 1) & 0xfff);
288 bfd_put_16 (abfd, insn, hit_data);
289 if (sym_value + 0x1000 >= 0x2000 || (sym_value & 1) != 0)
290 return bfd_reloc_overflow;
291 break;
292 default:
293 abort ();
294 break;
295 }
296
297 return bfd_reloc_ok;
298 }
299
300 /* This function is used for relocs which are only used for relaxing,
301 which the linker should otherwise ignore. */
302
303 static bfd_reloc_status_type
304 sh_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
305 asymbol *symbol ATTRIBUTE_UNUSED,
306 void *data ATTRIBUTE_UNUSED, asection *input_section,
307 bfd *output_bfd,
308 char **error_message ATTRIBUTE_UNUSED)
309 {
310 if (output_bfd != NULL)
311 reloc_entry->address += input_section->output_offset;
312 return bfd_reloc_ok;
313 }
314
315 /* This structure is used to map BFD reloc codes to SH ELF relocs. */
316
317 struct elf_reloc_map
318 {
319 bfd_reloc_code_real_type bfd_reloc_val;
320 unsigned char elf_reloc_val;
321 };
322
323 /* An array mapping BFD reloc codes to SH ELF relocs. */
324
325 static const struct elf_reloc_map sh_reloc_map[] =
326 {
327 { BFD_RELOC_NONE, R_SH_NONE },
328 { BFD_RELOC_32, R_SH_DIR32 },
329 { BFD_RELOC_16, R_SH_DIR16 },
330 { BFD_RELOC_8, R_SH_DIR8 },
331 { BFD_RELOC_CTOR, R_SH_DIR32 },
332 { BFD_RELOC_32_PCREL, R_SH_REL32 },
333 { BFD_RELOC_SH_PCDISP8BY2, R_SH_DIR8WPN },
334 { BFD_RELOC_SH_PCDISP12BY2, R_SH_IND12W },
335 { BFD_RELOC_SH_PCRELIMM8BY2, R_SH_DIR8WPZ },
336 { BFD_RELOC_SH_PCRELIMM8BY4, R_SH_DIR8WPL },
337 { BFD_RELOC_8_PCREL, R_SH_SWITCH8 },
338 { BFD_RELOC_SH_SWITCH16, R_SH_SWITCH16 },
339 { BFD_RELOC_SH_SWITCH32, R_SH_SWITCH32 },
340 { BFD_RELOC_SH_USES, R_SH_USES },
341 { BFD_RELOC_SH_COUNT, R_SH_COUNT },
342 { BFD_RELOC_SH_ALIGN, R_SH_ALIGN },
343 { BFD_RELOC_SH_CODE, R_SH_CODE },
344 { BFD_RELOC_SH_DATA, R_SH_DATA },
345 { BFD_RELOC_SH_LABEL, R_SH_LABEL },
346 { BFD_RELOC_VTABLE_INHERIT, R_SH_GNU_VTINHERIT },
347 { BFD_RELOC_VTABLE_ENTRY, R_SH_GNU_VTENTRY },
348 { BFD_RELOC_SH_LOOP_START, R_SH_LOOP_START },
349 { BFD_RELOC_SH_LOOP_END, R_SH_LOOP_END },
350 { BFD_RELOC_SH_TLS_GD_32, R_SH_TLS_GD_32 },
351 { BFD_RELOC_SH_TLS_LD_32, R_SH_TLS_LD_32 },
352 { BFD_RELOC_SH_TLS_LDO_32, R_SH_TLS_LDO_32 },
353 { BFD_RELOC_SH_TLS_IE_32, R_SH_TLS_IE_32 },
354 { BFD_RELOC_SH_TLS_LE_32, R_SH_TLS_LE_32 },
355 { BFD_RELOC_SH_TLS_DTPMOD32, R_SH_TLS_DTPMOD32 },
356 { BFD_RELOC_SH_TLS_DTPOFF32, R_SH_TLS_DTPOFF32 },
357 { BFD_RELOC_SH_TLS_TPOFF32, R_SH_TLS_TPOFF32 },
358 { BFD_RELOC_32_GOT_PCREL, R_SH_GOT32 },
359 { BFD_RELOC_32_PLT_PCREL, R_SH_PLT32 },
360 { BFD_RELOC_SH_COPY, R_SH_COPY },
361 { BFD_RELOC_SH_GLOB_DAT, R_SH_GLOB_DAT },
362 { BFD_RELOC_SH_JMP_SLOT, R_SH_JMP_SLOT },
363 { BFD_RELOC_SH_RELATIVE, R_SH_RELATIVE },
364 { BFD_RELOC_32_GOTOFF, R_SH_GOTOFF },
365 { BFD_RELOC_SH_GOTPC, R_SH_GOTPC },
366 { BFD_RELOC_SH_GOTPLT32, R_SH_GOTPLT32 },
367 { BFD_RELOC_SH_GOT20, R_SH_GOT20 },
368 { BFD_RELOC_SH_GOTOFF20, R_SH_GOTOFF20 },
369 { BFD_RELOC_SH_GOTFUNCDESC, R_SH_GOTFUNCDESC },
370 { BFD_RELOC_SH_GOTFUNCDESC20, R_SH_GOTFUNCDESC20 },
371 { BFD_RELOC_SH_GOTOFFFUNCDESC, R_SH_GOTOFFFUNCDESC },
372 { BFD_RELOC_SH_GOTOFFFUNCDESC20, R_SH_GOTOFFFUNCDESC20 },
373 { BFD_RELOC_SH_FUNCDESC, R_SH_FUNCDESC },
374 };
375
376 /* Given a BFD reloc code, return the howto structure for the
377 corresponding SH ELF reloc. */
378
379 static reloc_howto_type *
380 sh_elf_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code)
381 {
382 unsigned int i;
383
384 for (i = 0; i < sizeof (sh_reloc_map) / sizeof (struct elf_reloc_map); i++)
385 {
386 if (sh_reloc_map[i].bfd_reloc_val == code)
387 return get_howto_table (abfd) + (int) sh_reloc_map[i].elf_reloc_val;
388 }
389
390 return NULL;
391 }
392
393 static reloc_howto_type *
394 sh_elf_reloc_name_lookup (bfd *abfd, const char *r_name)
395 {
396 unsigned int i;
397
398 if (vxworks_object_p (abfd))
399 {
400 for (i = 0;
401 i < (sizeof (sh_vxworks_howto_table)
402 / sizeof (sh_vxworks_howto_table[0]));
403 i++)
404 if (sh_vxworks_howto_table[i].name != NULL
405 && strcasecmp (sh_vxworks_howto_table[i].name, r_name) == 0)
406 return &sh_vxworks_howto_table[i];
407 }
408 else
409 {
410 for (i = 0;
411 i < (sizeof (sh_elf_howto_table)
412 / sizeof (sh_elf_howto_table[0]));
413 i++)
414 if (sh_elf_howto_table[i].name != NULL
415 && strcasecmp (sh_elf_howto_table[i].name, r_name) == 0)
416 return &sh_elf_howto_table[i];
417 }
418
419 return NULL;
420 }
421
422 /* Given an ELF reloc, fill in the howto field of a relent. */
423
424 static bool
425 sh_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
426 {
427 unsigned int r;
428
429 r = ELF32_R_TYPE (dst->r_info);
430
431 if (r >= R_SH_FIRST_INVALID_RELOC_6
432 || (r >= R_SH_FIRST_INVALID_RELOC && r <= R_SH_LAST_INVALID_RELOC)
433 || (r >= R_SH_FIRST_INVALID_RELOC_2 && r <= R_SH_LAST_INVALID_RELOC_2)
434 || (r >= R_SH_FIRST_INVALID_RELOC_3 && r <= R_SH_LAST_INVALID_RELOC_3)
435 || (r >= R_SH_FIRST_INVALID_RELOC_4 && r <= R_SH_LAST_INVALID_RELOC_4)
436 || (r >= R_SH_FIRST_INVALID_RELOC_5 && r <= R_SH_LAST_INVALID_RELOC_5))
437 {
438 /* xgettext:c-format */
439 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
440 abfd, r);
441 bfd_set_error (bfd_error_bad_value);
442 return false;
443 }
444
445 cache_ptr->howto = get_howto_table (abfd) + r;
446 return true;
447 }
448
449 /* This function handles relaxing for SH ELF. See the corresponding
451 function in coff-sh.c for a description of what this does. FIXME:
452 There is a lot of duplication here between this code and the COFF
453 specific code. The format of relocs and symbols is wound deeply
454 into this code, but it would still be better if the duplication
455 could be eliminated somehow. Note in particular that although both
456 functions use symbols like R_SH_CODE, those symbols have different
457 values; in coff-sh.c they come from include/coff/sh.h, whereas here
458 they come from enum elf_sh_reloc_type in include/elf/sh.h. */
459
460 static bool
461 sh_elf_relax_section (bfd *abfd, asection *sec,
462 struct bfd_link_info *link_info, bool *again)
463 {
464 Elf_Internal_Shdr *symtab_hdr;
465 Elf_Internal_Rela *internal_relocs;
466 bool have_code;
467 Elf_Internal_Rela *irel, *irelend;
468 bfd_byte *contents = NULL;
469 Elf_Internal_Sym *isymbuf = NULL;
470
471 *again = false;
472
473 if (bfd_link_relocatable (link_info)
474 || (sec->flags & SEC_HAS_CONTENTS) == 0
475 || (sec->flags & SEC_RELOC) == 0
476 || sec->reloc_count == 0)
477 return true;
478
479 symtab_hdr = &elf_symtab_hdr (abfd);
480
481 internal_relocs = (_bfd_elf_link_read_relocs
482 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
483 link_info->keep_memory));
484 if (internal_relocs == NULL)
485 goto error_return;
486
487 have_code = false;
488
489 irelend = internal_relocs + sec->reloc_count;
490 for (irel = internal_relocs; irel < irelend; irel++)
491 {
492 bfd_vma laddr, paddr, symval;
493 unsigned short insn;
494 Elf_Internal_Rela *irelfn, *irelscan, *irelcount;
495 bfd_signed_vma foff;
496
497 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_CODE)
498 have_code = true;
499
500 if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_USES)
501 continue;
502
503 /* Get the section contents. */
504 if (contents == NULL)
505 {
506 if (elf_section_data (sec)->this_hdr.contents != NULL)
507 contents = elf_section_data (sec)->this_hdr.contents;
508 else
509 {
510 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
511 goto error_return;
512 }
513 }
514
515 /* The r_addend field of the R_SH_USES reloc will point us to
516 the register load. The 4 is because the r_addend field is
517 computed as though it were a jump offset, which are based
518 from 4 bytes after the jump instruction. */
519 laddr = irel->r_offset + 4 + irel->r_addend;
520 if (laddr >= sec->size)
521 {
522 /* xgettext:c-format */
523 _bfd_error_handler
524 (_("%pB: %#" PRIx64 ": warning: bad R_SH_USES offset"),
525 abfd, (uint64_t) irel->r_offset);
526 continue;
527 }
528 insn = bfd_get_16 (abfd, contents + laddr);
529
530 /* If the instruction is not mov.l NN,rN, we don't know what to
531 do. */
532 if ((insn & 0xf000) != 0xd000)
533 {
534 _bfd_error_handler
535 /* xgettext:c-format */
536 (_("%pB: %#" PRIx64 ": warning: "
537 "R_SH_USES points to unrecognized insn 0x%x"),
538 abfd, (uint64_t) irel->r_offset, insn);
539 continue;
540 }
541
542 /* Get the address from which the register is being loaded. The
543 displacement in the mov.l instruction is quadrupled. It is a
544 displacement from four bytes after the movl instruction, but,
545 before adding in the PC address, two least significant bits
546 of the PC are cleared. We assume that the section is aligned
547 on a four byte boundary. */
548 paddr = insn & 0xff;
549 paddr *= 4;
550 paddr += (laddr + 4) &~ (bfd_vma) 3;
551 if (paddr >= sec->size)
552 {
553 _bfd_error_handler
554 /* xgettext:c-format */
555 (_("%pB: %#" PRIx64 ": warning: bad R_SH_USES load offset"),
556 abfd, (uint64_t) irel->r_offset);
557 continue;
558 }
559
560 /* Get the reloc for the address from which the register is
561 being loaded. This reloc will tell us which function is
562 actually being called. */
563 for (irelfn = internal_relocs; irelfn < irelend; irelfn++)
564 if (irelfn->r_offset == paddr
565 && ELF32_R_TYPE (irelfn->r_info) == (int) R_SH_DIR32)
566 break;
567 if (irelfn >= irelend)
568 {
569 _bfd_error_handler
570 /* xgettext:c-format */
571 (_("%pB: %#" PRIx64 ": warning: could not find expected reloc"),
572 abfd, (uint64_t) paddr);
573 continue;
574 }
575
576 /* Read this BFD's symbols if we haven't done so already. */
577 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
578 {
579 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
580 if (isymbuf == NULL)
581 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
582 symtab_hdr->sh_info, 0,
583 NULL, NULL, NULL);
584 if (isymbuf == NULL)
585 goto error_return;
586 }
587
588 /* Get the value of the symbol referred to by the reloc. */
589 if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info)
590 {
591 /* A local symbol. */
592 Elf_Internal_Sym *isym;
593
594 isym = isymbuf + ELF32_R_SYM (irelfn->r_info);
595 if (isym->st_shndx
596 != (unsigned int) _bfd_elf_section_from_bfd_section (abfd, sec))
597 {
598 _bfd_error_handler
599 /* xgettext:c-format */
600 (_("%pB: %#" PRIx64 ": warning: symbol in unexpected section"),
601 abfd, (uint64_t) paddr);
602 continue;
603 }
604
605 symval = (isym->st_value
606 + sec->output_section->vma
607 + sec->output_offset);
608 }
609 else
610 {
611 unsigned long indx;
612 struct elf_link_hash_entry *h;
613
614 indx = ELF32_R_SYM (irelfn->r_info) - symtab_hdr->sh_info;
615 h = elf_sym_hashes (abfd)[indx];
616 BFD_ASSERT (h != NULL);
617 if (h->root.type != bfd_link_hash_defined
618 && h->root.type != bfd_link_hash_defweak)
619 {
620 /* This appears to be a reference to an undefined
621 symbol. Just ignore it--it will be caught by the
622 regular reloc processing. */
623 continue;
624 }
625
626 symval = (h->root.u.def.value
627 + h->root.u.def.section->output_section->vma
628 + h->root.u.def.section->output_offset);
629 }
630
631 if (get_howto_table (abfd)[R_SH_DIR32].partial_inplace)
632 symval += bfd_get_32 (abfd, contents + paddr);
633 else
634 symval += irelfn->r_addend;
635
636 /* See if this function call can be shortened. */
637 foff = (symval
638 - (irel->r_offset
639 + sec->output_section->vma
640 + sec->output_offset
641 + 4));
642 /* A branch to an address beyond ours might be increased by an
643 .align that doesn't move when bytes behind us are deleted.
644 So, we add some slop in this calculation to allow for
645 that. */
646 if (foff < -0x1000 || foff >= 0x1000 - 8)
647 {
648 /* After all that work, we can't shorten this function call. */
649 continue;
650 }
651
652 /* Shorten the function call. */
653
654 /* For simplicity of coding, we are going to modify the section
655 contents, the section relocs, and the BFD symbol table. We
656 must tell the rest of the code not to free up this
657 information. It would be possible to instead create a table
658 of changes which have to be made, as is done in coff-mips.c;
659 that would be more work, but would require less memory when
660 the linker is run. */
661
662 elf_section_data (sec)->relocs = internal_relocs;
663 elf_section_data (sec)->this_hdr.contents = contents;
664 symtab_hdr->contents = (unsigned char *) isymbuf;
665
666 /* Replace the jmp/jsr with a bra/bsr. */
667
668 /* Change the R_SH_USES reloc into an R_SH_IND12W reloc, and
669 replace the jmp/jsr with a bra/bsr. */
670 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irelfn->r_info), R_SH_IND12W);
671 /* We used to test (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info)
672 here, but that only checks if the symbol is an external symbol,
673 not if the symbol is in a different section. Besides, we need
674 a consistent meaning for the relocation, so we just assume here that
675 the value of the symbol is not available. */
676
677 /* We can't fully resolve this yet, because the external
678 symbol value may be changed by future relaxing. We let
679 the final link phase handle it. */
680 if (bfd_get_16 (abfd, contents + irel->r_offset) & 0x0020)
681 bfd_put_16 (abfd, (bfd_vma) 0xa000, contents + irel->r_offset);
682 else
683 bfd_put_16 (abfd, (bfd_vma) 0xb000, contents + irel->r_offset);
684
685 irel->r_addend = -4;
686
687 /* When we calculated the symbol "value" we had an offset in the
688 DIR32's word in memory (we read and add it above). However,
689 the jsr we create does NOT have this offset encoded, so we
690 have to add it to the addend to preserve it. */
691 irel->r_addend += bfd_get_32 (abfd, contents + paddr);
692
693 /* See if there is another R_SH_USES reloc referring to the same
694 register load. */
695 for (irelscan = internal_relocs; irelscan < irelend; irelscan++)
696 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_USES
697 && laddr == irelscan->r_offset + 4 + irelscan->r_addend)
698 break;
699 if (irelscan < irelend)
700 {
701 /* Some other function call depends upon this register load,
702 and we have not yet converted that function call.
703 Indeed, we may never be able to convert it. There is
704 nothing else we can do at this point. */
705 continue;
706 }
707
708 /* Look for a R_SH_COUNT reloc on the location where the
709 function address is stored. Do this before deleting any
710 bytes, to avoid confusion about the address. */
711 for (irelcount = internal_relocs; irelcount < irelend; irelcount++)
712 if (irelcount->r_offset == paddr
713 && ELF32_R_TYPE (irelcount->r_info) == (int) R_SH_COUNT)
714 break;
715
716 /* Delete the register load. */
717 if (! sh_elf_relax_delete_bytes (abfd, sec, laddr, 2))
718 goto error_return;
719
720 /* That will change things, so, just in case it permits some
721 other function call to come within range, we should relax
722 again. Note that this is not required, and it may be slow. */
723 *again = true;
724
725 /* Now check whether we got a COUNT reloc. */
726 if (irelcount >= irelend)
727 {
728 _bfd_error_handler
729 /* xgettext:c-format */
730 (_("%pB: %#" PRIx64 ": warning: "
731 "could not find expected COUNT reloc"),
732 abfd, (uint64_t) paddr);
733 continue;
734 }
735
736 /* The number of uses is stored in the r_addend field. We've
737 just deleted one. */
738 if (irelcount->r_addend == 0)
739 {
740 /* xgettext:c-format */
741 _bfd_error_handler (_("%pB: %#" PRIx64 ": warning: bad count"),
742 abfd, (uint64_t) paddr);
743 continue;
744 }
745
746 --irelcount->r_addend;
747
748 /* If there are no more uses, we can delete the address. Reload
749 the address from irelfn, in case it was changed by the
750 previous call to sh_elf_relax_delete_bytes. */
751 if (irelcount->r_addend == 0)
752 {
753 if (! sh_elf_relax_delete_bytes (abfd, sec, irelfn->r_offset, 4))
754 goto error_return;
755 }
756
757 /* We've done all we can with that function call. */
758 }
759
760 /* Look for load and store instructions that we can align on four
761 byte boundaries. */
762 if ((elf_elfheader (abfd)->e_flags & EF_SH_MACH_MASK) != EF_SH4
763 && have_code)
764 {
765 bool swapped;
766
767 /* Get the section contents. */
768 if (contents == NULL)
769 {
770 if (elf_section_data (sec)->this_hdr.contents != NULL)
771 contents = elf_section_data (sec)->this_hdr.contents;
772 else
773 {
774 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
775 goto error_return;
776 }
777 }
778
779 if (! sh_elf_align_loads (abfd, sec, internal_relocs, contents,
780 &swapped))
781 goto error_return;
782
783 if (swapped)
784 {
785 elf_section_data (sec)->relocs = internal_relocs;
786 elf_section_data (sec)->this_hdr.contents = contents;
787 symtab_hdr->contents = (unsigned char *) isymbuf;
788 }
789 }
790
791 if (isymbuf != NULL
792 && symtab_hdr->contents != (unsigned char *) isymbuf)
793 {
794 if (! link_info->keep_memory)
795 free (isymbuf);
796 else
797 {
798 /* Cache the symbols for elf_link_input_bfd. */
799 symtab_hdr->contents = (unsigned char *) isymbuf;
800 }
801 }
802
803 if (contents != NULL
804 && elf_section_data (sec)->this_hdr.contents != contents)
805 {
806 if (! link_info->keep_memory)
807 free (contents);
808 else
809 {
810 /* Cache the section contents for elf_link_input_bfd. */
811 elf_section_data (sec)->this_hdr.contents = contents;
812 }
813 }
814
815 if (elf_section_data (sec)->relocs != internal_relocs)
816 free (internal_relocs);
817
818 return true;
819
820 error_return:
821 if (symtab_hdr->contents != (unsigned char *) isymbuf)
822 free (isymbuf);
823 if (elf_section_data (sec)->this_hdr.contents != contents)
824 free (contents);
825 if (elf_section_data (sec)->relocs != internal_relocs)
826 free (internal_relocs);
827
828 return false;
829 }
830
831 /* Delete some bytes from a section while relaxing. FIXME: There is a
832 lot of duplication between this function and sh_relax_delete_bytes
833 in coff-sh.c. */
834
835 static bool
836 sh_elf_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr,
837 int count)
838 {
839 Elf_Internal_Shdr *symtab_hdr;
840 unsigned int sec_shndx;
841 bfd_byte *contents;
842 Elf_Internal_Rela *irel, *irelend;
843 Elf_Internal_Rela *irelalign;
844 bfd_vma toaddr;
845 Elf_Internal_Sym *isymbuf, *isym, *isymend;
846 struct elf_link_hash_entry **sym_hashes;
847 struct elf_link_hash_entry **end_hashes;
848 unsigned int symcount;
849 asection *o;
850
851 symtab_hdr = &elf_symtab_hdr (abfd);
852 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
853
854 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
855
856 contents = elf_section_data (sec)->this_hdr.contents;
857
858 /* The deletion must stop at the next ALIGN reloc for an alignment
859 power larger than the number of bytes we are deleting. */
860
861 irelalign = NULL;
862 toaddr = sec->size;
863
864 irel = elf_section_data (sec)->relocs;
865 irelend = irel + sec->reloc_count;
866 for (; irel < irelend; irel++)
867 {
868 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN
869 && irel->r_offset > addr
870 && count < (1 << irel->r_addend))
871 {
872 irelalign = irel;
873 toaddr = irel->r_offset;
874 break;
875 }
876 }
877
878 /* Actually delete the bytes. */
879 memmove (contents + addr, contents + addr + count,
880 (size_t) (toaddr - addr - count));
881 if (irelalign == NULL)
882 sec->size -= count;
883 else
884 {
885 int i;
886
887 #define NOP_OPCODE (0x0009)
888
889 BFD_ASSERT ((count & 1) == 0);
890 for (i = 0; i < count; i += 2)
891 bfd_put_16 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i);
892 }
893
894 /* Adjust all the relocs. */
895 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
896 {
897 bfd_vma nraddr, stop;
898 bfd_vma start = 0;
899 int insn = 0;
900 int off, adjust, oinsn;
901 bfd_signed_vma voff = 0;
902 bool overflow;
903
904 /* Get the new reloc address. */
905 nraddr = irel->r_offset;
906 if ((irel->r_offset > addr
907 && irel->r_offset < toaddr)
908 || (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN
909 && irel->r_offset == toaddr))
910 nraddr -= count;
911
912 /* See if this reloc was for the bytes we have deleted, in which
913 case we no longer care about it. Don't delete relocs which
914 represent addresses, though. */
915 if (irel->r_offset >= addr
916 && irel->r_offset < addr + count
917 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_ALIGN
918 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE
919 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_DATA
920 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_LABEL)
921 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
922 (int) R_SH_NONE);
923
924 /* If this is a PC relative reloc, see if the range it covers
925 includes the bytes we have deleted. */
926 switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
927 {
928 default:
929 break;
930
931 case R_SH_DIR8WPN:
932 case R_SH_IND12W:
933 case R_SH_DIR8WPZ:
934 case R_SH_DIR8WPL:
935 start = irel->r_offset;
936 insn = bfd_get_16 (abfd, contents + nraddr);
937 break;
938 }
939
940 switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
941 {
942 default:
943 start = stop = addr;
944 break;
945
946 case R_SH_DIR32:
947 /* If this reloc is against a symbol defined in this
948 section, and the symbol will not be adjusted below, we
949 must check the addend to see it will put the value in
950 range to be adjusted, and hence must be changed. */
951 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
952 {
953 isym = isymbuf + ELF32_R_SYM (irel->r_info);
954 if (isym->st_shndx == sec_shndx
955 && (isym->st_value <= addr
956 || isym->st_value >= toaddr))
957 {
958 bfd_vma val;
959
960 if (get_howto_table (abfd)[R_SH_DIR32].partial_inplace)
961 {
962 val = bfd_get_32 (abfd, contents + nraddr);
963 val += isym->st_value;
964 if (val > addr && val < toaddr)
965 bfd_put_32 (abfd, val - count, contents + nraddr);
966 }
967 else
968 {
969 val = isym->st_value + irel->r_addend;
970 if (val > addr && val < toaddr)
971 irel->r_addend -= count;
972 }
973 }
974 }
975 start = stop = addr;
976 break;
977
978 case R_SH_DIR8WPN:
979 off = insn & 0xff;
980 if (off & 0x80)
981 off -= 0x100;
982 stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
983 break;
984
985 case R_SH_IND12W:
986 off = insn & 0xfff;
987 if (! off)
988 {
989 /* This has been made by previous relaxation. Since the
990 relocation will be against an external symbol, the
991 final relocation will just do the right thing. */
992 start = stop = addr;
993 }
994 else
995 {
996 if (off & 0x800)
997 off -= 0x1000;
998 stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
999
1000 /* The addend will be against the section symbol, thus
1001 for adjusting the addend, the relevant start is the
1002 start of the section.
1003 N.B. If we want to abandon in-place changes here and
1004 test directly using symbol + addend, we have to take into
1005 account that the addend has already been adjusted by -4. */
1006 if (stop > addr && stop < toaddr)
1007 irel->r_addend -= count;
1008 }
1009 break;
1010
1011 case R_SH_DIR8WPZ:
1012 off = insn & 0xff;
1013 stop = start + 4 + off * 2;
1014 break;
1015
1016 case R_SH_DIR8WPL:
1017 off = insn & 0xff;
1018 stop = (start & ~(bfd_vma) 3) + 4 + off * 4;
1019 break;
1020
1021 case R_SH_SWITCH8:
1022 case R_SH_SWITCH16:
1023 case R_SH_SWITCH32:
1024 /* These relocs types represent
1025 .word L2-L1
1026 The r_addend field holds the difference between the reloc
1027 address and L1. That is the start of the reloc, and
1028 adding in the contents gives us the top. We must adjust
1029 both the r_offset field and the section contents.
1030 N.B. in gas / coff bfd, the elf bfd r_addend is called r_offset,
1031 and the elf bfd r_offset is called r_vaddr. */
1032
1033 stop = irel->r_offset;
1034 start = (bfd_vma) ((bfd_signed_vma) stop - (long) irel->r_addend);
1035
1036 if (start > addr
1037 && start < toaddr
1038 && (stop <= addr || stop >= toaddr))
1039 irel->r_addend += count;
1040 else if (stop > addr
1041 && stop < toaddr
1042 && (start <= addr || start >= toaddr))
1043 irel->r_addend -= count;
1044
1045 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH16)
1046 voff = bfd_get_signed_16 (abfd, contents + nraddr);
1047 else if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH8)
1048 voff = bfd_get_8 (abfd, contents + nraddr);
1049 else
1050 voff = bfd_get_signed_32 (abfd, contents + nraddr);
1051 stop = (bfd_vma) ((bfd_signed_vma) start + voff);
1052
1053 break;
1054
1055 case R_SH_USES:
1056 start = irel->r_offset;
1057 stop = (bfd_vma) ((bfd_signed_vma) start
1058 + (long) irel->r_addend
1059 + 4);
1060 break;
1061 }
1062
1063 if (start > addr
1064 && start < toaddr
1065 && (stop <= addr || stop >= toaddr))
1066 adjust = count;
1067 else if (stop > addr
1068 && stop < toaddr
1069 && (start <= addr || start >= toaddr))
1070 adjust = - count;
1071 else
1072 adjust = 0;
1073
1074 if (adjust != 0)
1075 {
1076 oinsn = insn;
1077 overflow = false;
1078 switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
1079 {
1080 default:
1081 abort ();
1082 break;
1083
1084 case R_SH_DIR8WPN:
1085 case R_SH_DIR8WPZ:
1086 insn += adjust / 2;
1087 if ((oinsn & 0xff00) != (insn & 0xff00))
1088 overflow = true;
1089 bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
1090 break;
1091
1092 case R_SH_IND12W:
1093 insn += adjust / 2;
1094 if ((oinsn & 0xf000) != (insn & 0xf000))
1095 overflow = true;
1096 bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
1097 break;
1098
1099 case R_SH_DIR8WPL:
1100 BFD_ASSERT (adjust == count || count >= 4);
1101 if (count >= 4)
1102 insn += adjust / 4;
1103 else
1104 {
1105 if ((irel->r_offset & 3) == 0)
1106 ++insn;
1107 }
1108 if ((oinsn & 0xff00) != (insn & 0xff00))
1109 overflow = true;
1110 bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
1111 break;
1112
1113 case R_SH_SWITCH8:
1114 voff += adjust;
1115 if (voff < 0 || voff >= 0xff)
1116 overflow = true;
1117 bfd_put_8 (abfd, voff, contents + nraddr);
1118 break;
1119
1120 case R_SH_SWITCH16:
1121 voff += adjust;
1122 if (voff < - 0x8000 || voff >= 0x8000)
1123 overflow = true;
1124 bfd_put_signed_16 (abfd, (bfd_vma) voff, contents + nraddr);
1125 break;
1126
1127 case R_SH_SWITCH32:
1128 voff += adjust;
1129 bfd_put_signed_32 (abfd, (bfd_vma) voff, contents + nraddr);
1130 break;
1131
1132 case R_SH_USES:
1133 irel->r_addend += adjust;
1134 break;
1135 }
1136
1137 if (overflow)
1138 {
1139 _bfd_error_handler
1140 /* xgettext:c-format */
1141 (_("%pB: %#" PRIx64 ": fatal: reloc overflow while relaxing"),
1142 abfd, (uint64_t) irel->r_offset);
1143 bfd_set_error (bfd_error_bad_value);
1144 return false;
1145 }
1146 }
1147
1148 irel->r_offset = nraddr;
1149 }
1150
1151 /* Look through all the other sections. If there contain any IMM32
1152 relocs against internal symbols which we are not going to adjust
1153 below, we may need to adjust the addends. */
1154 for (o = abfd->sections; o != NULL; o = o->next)
1155 {
1156 Elf_Internal_Rela *internal_relocs;
1157 Elf_Internal_Rela *irelscan, *irelscanend;
1158 bfd_byte *ocontents;
1159
1160 if (o == sec
1161 || (o->flags & SEC_HAS_CONTENTS) == 0
1162 || (o->flags & SEC_RELOC) == 0
1163 || o->reloc_count == 0)
1164 continue;
1165
1166 /* We always cache the relocs. Perhaps, if info->keep_memory is
1167 FALSE, we should free them, if we are permitted to, when we
1168 leave sh_coff_relax_section. */
1169 internal_relocs = (_bfd_elf_link_read_relocs
1170 (abfd, o, NULL, (Elf_Internal_Rela *) NULL, true));
1171 if (internal_relocs == NULL)
1172 return false;
1173
1174 ocontents = NULL;
1175 irelscanend = internal_relocs + o->reloc_count;
1176 for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++)
1177 {
1178 /* Dwarf line numbers use R_SH_SWITCH32 relocs. */
1179 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_SWITCH32)
1180 {
1181 bfd_vma start, stop;
1182 bfd_signed_vma voff;
1183
1184 if (ocontents == NULL)
1185 {
1186 if (elf_section_data (o)->this_hdr.contents != NULL)
1187 ocontents = elf_section_data (o)->this_hdr.contents;
1188 else
1189 {
1190 /* We always cache the section contents.
1191 Perhaps, if info->keep_memory is FALSE, we
1192 should free them, if we are permitted to,
1193 when we leave sh_coff_relax_section. */
1194 if (!bfd_malloc_and_get_section (abfd, o, &ocontents))
1195 {
1196 free (ocontents);
1197 return false;
1198 }
1199
1200 elf_section_data (o)->this_hdr.contents = ocontents;
1201 }
1202 }
1203
1204 stop = irelscan->r_offset;
1205 start
1206 = (bfd_vma) ((bfd_signed_vma) stop - (long) irelscan->r_addend);
1207
1208 /* STOP is in a different section, so it won't change. */
1209 if (start > addr && start < toaddr)
1210 irelscan->r_addend += count;
1211
1212 voff = bfd_get_signed_32 (abfd, ocontents + irelscan->r_offset);
1213 stop = (bfd_vma) ((bfd_signed_vma) start + voff);
1214
1215 if (start > addr
1216 && start < toaddr
1217 && (stop <= addr || stop >= toaddr))
1218 bfd_put_signed_32 (abfd, (bfd_vma) voff + count,
1219 ocontents + irelscan->r_offset);
1220 else if (stop > addr
1221 && stop < toaddr
1222 && (start <= addr || start >= toaddr))
1223 bfd_put_signed_32 (abfd, (bfd_vma) voff - count,
1224 ocontents + irelscan->r_offset);
1225 }
1226
1227 if (ELF32_R_TYPE (irelscan->r_info) != (int) R_SH_DIR32)
1228 continue;
1229
1230 if (ELF32_R_SYM (irelscan->r_info) >= symtab_hdr->sh_info)
1231 continue;
1232
1233
1234 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1235 if (isym->st_shndx == sec_shndx
1236 && (isym->st_value <= addr
1237 || isym->st_value >= toaddr))
1238 {
1239 bfd_vma val;
1240
1241 if (ocontents == NULL)
1242 {
1243 if (elf_section_data (o)->this_hdr.contents != NULL)
1244 ocontents = elf_section_data (o)->this_hdr.contents;
1245 else
1246 {
1247 /* We always cache the section contents.
1248 Perhaps, if info->keep_memory is FALSE, we
1249 should free them, if we are permitted to,
1250 when we leave sh_coff_relax_section. */
1251 if (!bfd_malloc_and_get_section (abfd, o, &ocontents))
1252 {
1253 free (ocontents);
1254 return false;
1255 }
1256
1257 elf_section_data (o)->this_hdr.contents = ocontents;
1258 }
1259 }
1260
1261 val = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
1262 val += isym->st_value;
1263 if (val > addr && val < toaddr)
1264 bfd_put_32 (abfd, val - count,
1265 ocontents + irelscan->r_offset);
1266 }
1267 }
1268 }
1269
1270 /* Adjust the local symbols defined in this section. */
1271 isymend = isymbuf + symtab_hdr->sh_info;
1272 for (isym = isymbuf; isym < isymend; isym++)
1273 {
1274 if (isym->st_shndx == sec_shndx
1275 && isym->st_value > addr
1276 && isym->st_value < toaddr)
1277 isym->st_value -= count;
1278 }
1279
1280 /* Now adjust the global symbols defined in this section. */
1281 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1282 - symtab_hdr->sh_info);
1283 sym_hashes = elf_sym_hashes (abfd);
1284 end_hashes = sym_hashes + symcount;
1285 for (; sym_hashes < end_hashes; sym_hashes++)
1286 {
1287 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1288 if ((sym_hash->root.type == bfd_link_hash_defined
1289 || sym_hash->root.type == bfd_link_hash_defweak)
1290 && sym_hash->root.u.def.section == sec
1291 && sym_hash->root.u.def.value > addr
1292 && sym_hash->root.u.def.value < toaddr)
1293 {
1294 sym_hash->root.u.def.value -= count;
1295 }
1296 }
1297
1298 /* See if we can move the ALIGN reloc forward. We have adjusted
1299 r_offset for it already. */
1300 if (irelalign != NULL)
1301 {
1302 bfd_vma alignto, alignaddr;
1303
1304 alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend);
1305 alignaddr = BFD_ALIGN (irelalign->r_offset,
1306 1 << irelalign->r_addend);
1307 if (alignto != alignaddr)
1308 {
1309 /* Tail recursion. */
1310 return sh_elf_relax_delete_bytes (abfd, sec, alignaddr,
1311 (int) (alignto - alignaddr));
1312 }
1313 }
1314
1315 return true;
1316 }
1317
1318 /* Look for loads and stores which we can align to four byte
1319 boundaries. This is like sh_align_loads in coff-sh.c. */
1320
1321 static bool
1322 sh_elf_align_loads (bfd *abfd ATTRIBUTE_UNUSED, asection *sec,
1323 Elf_Internal_Rela *internal_relocs,
1324 bfd_byte *contents ATTRIBUTE_UNUSED,
1325 bool *pswapped)
1326 {
1327 Elf_Internal_Rela *irel, *irelend;
1328 bfd_vma *labels = NULL;
1329 bfd_vma *label, *label_end;
1330 bfd_size_type amt;
1331
1332 *pswapped = false;
1333
1334 irelend = internal_relocs + sec->reloc_count;
1335
1336 /* Get all the addresses with labels on them. */
1337 amt = sec->reloc_count;
1338 amt *= sizeof (bfd_vma);
1339 labels = (bfd_vma *) bfd_malloc (amt);
1340 if (labels == NULL)
1341 goto error_return;
1342 label_end = labels;
1343 for (irel = internal_relocs; irel < irelend; irel++)
1344 {
1345 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_LABEL)
1346 {
1347 *label_end = irel->r_offset;
1348 ++label_end;
1349 }
1350 }
1351
1352 /* Note that the assembler currently always outputs relocs in
1353 address order. If that ever changes, this code will need to sort
1354 the label values and the relocs. */
1355
1356 label = labels;
1357
1358 for (irel = internal_relocs; irel < irelend; irel++)
1359 {
1360 bfd_vma start, stop;
1361
1362 if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE)
1363 continue;
1364
1365 start = irel->r_offset;
1366
1367 for (irel++; irel < irelend; irel++)
1368 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_DATA)
1369 break;
1370 if (irel < irelend)
1371 stop = irel->r_offset;
1372 else
1373 stop = sec->size;
1374
1375 if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_elf_swap_insns,
1376 internal_relocs, &label,
1377 label_end, start, stop, pswapped))
1378 goto error_return;
1379 }
1380
1381 free (labels);
1382
1383 return true;
1384
1385 error_return:
1386 free (labels);
1387 return false;
1388 }
1389
1390 /* Swap two SH instructions. This is like sh_swap_insns in coff-sh.c. */
1391
1392 static bool
1393 sh_elf_swap_insns (bfd *abfd, asection *sec, void *relocs,
1394 bfd_byte *contents, bfd_vma addr)
1395 {
1396 Elf_Internal_Rela *internal_relocs = (Elf_Internal_Rela *) relocs;
1397 unsigned short i1, i2;
1398 Elf_Internal_Rela *irel, *irelend;
1399
1400 /* Swap the instructions themselves. */
1401 i1 = bfd_get_16 (abfd, contents + addr);
1402 i2 = bfd_get_16 (abfd, contents + addr + 2);
1403 bfd_put_16 (abfd, (bfd_vma) i2, contents + addr);
1404 bfd_put_16 (abfd, (bfd_vma) i1, contents + addr + 2);
1405
1406 /* Adjust all reloc addresses. */
1407 irelend = internal_relocs + sec->reloc_count;
1408 for (irel = internal_relocs; irel < irelend; irel++)
1409 {
1410 enum elf_sh_reloc_type type;
1411 int add;
1412
1413 /* There are a few special types of relocs that we don't want to
1414 adjust. These relocs do not apply to the instruction itself,
1415 but are only associated with the address. */
1416 type = (enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info);
1417 if (type == R_SH_ALIGN
1418 || type == R_SH_CODE
1419 || type == R_SH_DATA
1420 || type == R_SH_LABEL)
1421 continue;
1422
1423 /* If an R_SH_USES reloc points to one of the addresses being
1424 swapped, we must adjust it. It would be incorrect to do this
1425 for a jump, though, since we want to execute both
1426 instructions after the jump. (We have avoided swapping
1427 around a label, so the jump will not wind up executing an
1428 instruction it shouldn't). */
1429 if (type == R_SH_USES)
1430 {
1431 bfd_vma off;
1432
1433 off = irel->r_offset + 4 + irel->r_addend;
1434 if (off == addr)
1435 irel->r_offset += 2;
1436 else if (off == addr + 2)
1437 irel->r_offset -= 2;
1438 }
1439
1440 if (irel->r_offset == addr)
1441 {
1442 irel->r_offset += 2;
1443 add = -2;
1444 }
1445 else if (irel->r_offset == addr + 2)
1446 {
1447 irel->r_offset -= 2;
1448 add = 2;
1449 }
1450 else
1451 add = 0;
1452
1453 if (add != 0)
1454 {
1455 bfd_byte *loc;
1456 unsigned short insn, oinsn;
1457 bool overflow;
1458
1459 loc = contents + irel->r_offset;
1460 overflow = false;
1461 switch (type)
1462 {
1463 default:
1464 break;
1465
1466 case R_SH_DIR8WPN:
1467 case R_SH_DIR8WPZ:
1468 insn = bfd_get_16 (abfd, loc);
1469 oinsn = insn;
1470 insn += add / 2;
1471 if ((oinsn & 0xff00) != (insn & 0xff00))
1472 overflow = true;
1473 bfd_put_16 (abfd, (bfd_vma) insn, loc);
1474 break;
1475
1476 case R_SH_IND12W:
1477 insn = bfd_get_16 (abfd, loc);
1478 oinsn = insn;
1479 insn += add / 2;
1480 if ((oinsn & 0xf000) != (insn & 0xf000))
1481 overflow = true;
1482 bfd_put_16 (abfd, (bfd_vma) insn, loc);
1483 break;
1484
1485 case R_SH_DIR8WPL:
1486 /* This reloc ignores the least significant 3 bits of
1487 the program counter before adding in the offset.
1488 This means that if ADDR is at an even address, the
1489 swap will not affect the offset. If ADDR is an at an
1490 odd address, then the instruction will be crossing a
1491 four byte boundary, and must be adjusted. */
1492 if ((addr & 3) != 0)
1493 {
1494 insn = bfd_get_16 (abfd, loc);
1495 oinsn = insn;
1496 insn += add / 2;
1497 if ((oinsn & 0xff00) != (insn & 0xff00))
1498 overflow = true;
1499 bfd_put_16 (abfd, (bfd_vma) insn, loc);
1500 }
1501
1502 break;
1503 }
1504
1505 if (overflow)
1506 {
1507 _bfd_error_handler
1508 /* xgettext:c-format */
1509 (_("%pB: %#" PRIx64 ": fatal: reloc overflow while relaxing"),
1510 abfd, (uint64_t) irel->r_offset);
1511 bfd_set_error (bfd_error_bad_value);
1512 return false;
1513 }
1514 }
1515 }
1516
1517 return true;
1518 }
1519
1520 /* Describes one of the various PLT styles. */
1522
1523 struct elf_sh_plt_info
1524 {
1525 /* The template for the first PLT entry, or NULL if there is no special
1526 first entry. */
1527 const bfd_byte *plt0_entry;
1528
1529 /* The size of PLT0_ENTRY in bytes, or 0 if PLT0_ENTRY is NULL. */
1530 bfd_vma plt0_entry_size;
1531
1532 /* Index I is the offset into PLT0_ENTRY of a pointer to
1533 _GLOBAL_OFFSET_TABLE_ + I * 4. The value is MINUS_ONE
1534 if there is no such pointer. */
1535 bfd_vma plt0_got_fields[3];
1536
1537 /* The template for a symbol's PLT entry. */
1538 const bfd_byte *symbol_entry;
1539
1540 /* The size of SYMBOL_ENTRY in bytes. */
1541 bfd_vma symbol_entry_size;
1542
1543 /* Byte offsets of fields in SYMBOL_ENTRY. Not all fields are used
1544 on all targets. The comments by each member indicate the value
1545 that the field must hold. */
1546 struct {
1547 bfd_vma got_entry; /* the address of the symbol's .got.plt entry */
1548 bfd_vma plt; /* .plt (or a branch to .plt on VxWorks) */
1549 bfd_vma reloc_offset; /* the offset of the symbol's JMP_SLOT reloc */
1550 bool got20; /* TRUE if got_entry points to a movi20 instruction
1551 (instead of a constant pool entry). */
1552 } symbol_fields;
1553
1554 /* The offset of the resolver stub from the start of SYMBOL_ENTRY. */
1555 bfd_vma symbol_resolve_offset;
1556
1557 /* A different PLT layout which can be used for the first
1558 MAX_SHORT_PLT entries. It must share the same plt0. NULL in
1559 other cases. */
1560 const struct elf_sh_plt_info *short_plt;
1561 };
1562
1563 /* The size in bytes of an entry in the procedure linkage table. */
1564
1565 #define ELF_PLT_ENTRY_SIZE 28
1566
1567 /* First entry in an absolute procedure linkage table look like this. */
1568
1569 /* Note - this code has been "optimised" not to use r2. r2 is used by
1570 GCC to return the address of large structures, so it should not be
1571 corrupted here. This does mean however, that this PLT does not conform
1572 to the SH PIC ABI. That spec says that r0 contains the type of the PLT
1573 and r2 contains the GOT id. This version stores the GOT id in r0 and
1574 ignores the type. Loaders can easily detect this difference however,
1575 since the type will always be 0 or 8, and the GOT ids will always be
1576 greater than or equal to 12. */
1577 static const bfd_byte elf_sh_plt0_entry_be[ELF_PLT_ENTRY_SIZE] =
1578 {
1579 0xd0, 0x05, /* mov.l 2f,r0 */
1580 0x60, 0x02, /* mov.l @r0,r0 */
1581 0x2f, 0x06, /* mov.l r0,@-r15 */
1582 0xd0, 0x03, /* mov.l 1f,r0 */
1583 0x60, 0x02, /* mov.l @r0,r0 */
1584 0x40, 0x2b, /* jmp @r0 */
1585 0x60, 0xf6, /* mov.l @r15+,r0 */
1586 0x00, 0x09, /* nop */
1587 0x00, 0x09, /* nop */
1588 0x00, 0x09, /* nop */
1589 0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
1590 0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
1591 };
1592
1593 static const bfd_byte elf_sh_plt0_entry_le[ELF_PLT_ENTRY_SIZE] =
1594 {
1595 0x05, 0xd0, /* mov.l 2f,r0 */
1596 0x02, 0x60, /* mov.l @r0,r0 */
1597 0x06, 0x2f, /* mov.l r0,@-r15 */
1598 0x03, 0xd0, /* mov.l 1f,r0 */
1599 0x02, 0x60, /* mov.l @r0,r0 */
1600 0x2b, 0x40, /* jmp @r0 */
1601 0xf6, 0x60, /* mov.l @r15+,r0 */
1602 0x09, 0x00, /* nop */
1603 0x09, 0x00, /* nop */
1604 0x09, 0x00, /* nop */
1605 0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
1606 0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
1607 };
1608
1609 /* Sebsequent entries in an absolute procedure linkage table look like
1610 this. */
1611
1612 static const bfd_byte elf_sh_plt_entry_be[ELF_PLT_ENTRY_SIZE] =
1613 {
1614 0xd0, 0x04, /* mov.l 1f,r0 */
1615 0x60, 0x02, /* mov.l @(r0,r12),r0 */
1616 0xd1, 0x02, /* mov.l 0f,r1 */
1617 0x40, 0x2b, /* jmp @r0 */
1618 0x60, 0x13, /* mov r1,r0 */
1619 0xd1, 0x03, /* mov.l 2f,r1 */
1620 0x40, 0x2b, /* jmp @r0 */
1621 0x00, 0x09, /* nop */
1622 0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
1623 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1624 0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
1625 };
1626
1627 static const bfd_byte elf_sh_plt_entry_le[ELF_PLT_ENTRY_SIZE] =
1628 {
1629 0x04, 0xd0, /* mov.l 1f,r0 */
1630 0x02, 0x60, /* mov.l @r0,r0 */
1631 0x02, 0xd1, /* mov.l 0f,r1 */
1632 0x2b, 0x40, /* jmp @r0 */
1633 0x13, 0x60, /* mov r1,r0 */
1634 0x03, 0xd1, /* mov.l 2f,r1 */
1635 0x2b, 0x40, /* jmp @r0 */
1636 0x09, 0x00, /* nop */
1637 0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
1638 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1639 0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
1640 };
1641
1642 /* Entries in a PIC procedure linkage table look like this. */
1643
1644 static const bfd_byte elf_sh_pic_plt_entry_be[ELF_PLT_ENTRY_SIZE] =
1645 {
1646 0xd0, 0x04, /* mov.l 1f,r0 */
1647 0x00, 0xce, /* mov.l @(r0,r12),r0 */
1648 0x40, 0x2b, /* jmp @r0 */
1649 0x00, 0x09, /* nop */
1650 0x50, 0xc2, /* mov.l @(8,r12),r0 */
1651 0xd1, 0x03, /* mov.l 2f,r1 */
1652 0x40, 0x2b, /* jmp @r0 */
1653 0x50, 0xc1, /* mov.l @(4,r12),r0 */
1654 0x00, 0x09, /* nop */
1655 0x00, 0x09, /* nop */
1656 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1657 0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
1658 };
1659
1660 static const bfd_byte elf_sh_pic_plt_entry_le[ELF_PLT_ENTRY_SIZE] =
1661 {
1662 0x04, 0xd0, /* mov.l 1f,r0 */
1663 0xce, 0x00, /* mov.l @(r0,r12),r0 */
1664 0x2b, 0x40, /* jmp @r0 */
1665 0x09, 0x00, /* nop */
1666 0xc2, 0x50, /* mov.l @(8,r12),r0 */
1667 0x03, 0xd1, /* mov.l 2f,r1 */
1668 0x2b, 0x40, /* jmp @r0 */
1669 0xc1, 0x50, /* mov.l @(4,r12),r0 */
1670 0x09, 0x00, /* nop */
1671 0x09, 0x00, /* nop */
1672 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1673 0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
1674 };
1675
1676 static const struct elf_sh_plt_info elf_sh_plts[2][2] = {
1677 {
1678 {
1679 /* Big-endian non-PIC. */
1680 elf_sh_plt0_entry_be,
1681 ELF_PLT_ENTRY_SIZE,
1682 { MINUS_ONE, 24, 20 },
1683 elf_sh_plt_entry_be,
1684 ELF_PLT_ENTRY_SIZE,
1685 { 20, 16, 24, false },
1686 8,
1687 NULL
1688 },
1689 {
1690 /* Little-endian non-PIC. */
1691 elf_sh_plt0_entry_le,
1692 ELF_PLT_ENTRY_SIZE,
1693 { MINUS_ONE, 24, 20 },
1694 elf_sh_plt_entry_le,
1695 ELF_PLT_ENTRY_SIZE,
1696 { 20, 16, 24, false },
1697 8,
1698 NULL
1699 },
1700 },
1701 {
1702 {
1703 /* Big-endian PIC. */
1704 elf_sh_plt0_entry_be,
1705 ELF_PLT_ENTRY_SIZE,
1706 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1707 elf_sh_pic_plt_entry_be,
1708 ELF_PLT_ENTRY_SIZE,
1709 { 20, MINUS_ONE, 24, false },
1710 8,
1711 NULL
1712 },
1713 {
1714 /* Little-endian PIC. */
1715 elf_sh_plt0_entry_le,
1716 ELF_PLT_ENTRY_SIZE,
1717 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1718 elf_sh_pic_plt_entry_le,
1719 ELF_PLT_ENTRY_SIZE,
1720 { 20, MINUS_ONE, 24, false },
1721 8,
1722 NULL
1723 },
1724 }
1725 };
1726
1727 #define VXWORKS_PLT_HEADER_SIZE 12
1728 #define VXWORKS_PLT_ENTRY_SIZE 24
1729
1730 static const bfd_byte vxworks_sh_plt0_entry_be[VXWORKS_PLT_HEADER_SIZE] =
1731 {
1732 0xd1, 0x01, /* mov.l @(8,pc),r1 */
1733 0x61, 0x12, /* mov.l @r1,r1 */
1734 0x41, 0x2b, /* jmp @r1 */
1735 0x00, 0x09, /* nop */
1736 0, 0, 0, 0 /* 0: replaced with _GLOBAL_OFFSET_TABLE+8. */
1737 };
1738
1739 static const bfd_byte vxworks_sh_plt0_entry_le[VXWORKS_PLT_HEADER_SIZE] =
1740 {
1741 0x01, 0xd1, /* mov.l @(8,pc),r1 */
1742 0x12, 0x61, /* mov.l @r1,r1 */
1743 0x2b, 0x41, /* jmp @r1 */
1744 0x09, 0x00, /* nop */
1745 0, 0, 0, 0 /* 0: replaced with _GLOBAL_OFFSET_TABLE+8. */
1746 };
1747
1748 static const bfd_byte vxworks_sh_plt_entry_be[VXWORKS_PLT_ENTRY_SIZE] =
1749 {
1750 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1751 0x60, 0x02, /* mov.l @r0,r0 */
1752 0x40, 0x2b, /* jmp @r0 */
1753 0x00, 0x09, /* nop */
1754 0, 0, 0, 0, /* 0: replaced with address of this symbol in .got. */
1755 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1756 0xa0, 0x00, /* bra PLT (We need to fix the offset.) */
1757 0x00, 0x09, /* nop */
1758 0x00, 0x09, /* nop */
1759 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1760 };
1761
1762 static const bfd_byte vxworks_sh_plt_entry_le[VXWORKS_PLT_ENTRY_SIZE] =
1763 {
1764 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1765 0x02, 0x60, /* mov.l @r0,r0 */
1766 0x2b, 0x40, /* jmp @r0 */
1767 0x09, 0x00, /* nop */
1768 0, 0, 0, 0, /* 0: replaced with address of this symbol in .got. */
1769 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1770 0x00, 0xa0, /* bra PLT (We need to fix the offset.) */
1771 0x09, 0x00, /* nop */
1772 0x09, 0x00, /* nop */
1773 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1774 };
1775
1776 static const bfd_byte vxworks_sh_pic_plt_entry_be[VXWORKS_PLT_ENTRY_SIZE] =
1777 {
1778 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1779 0x00, 0xce, /* mov.l @(r0,r12),r0 */
1780 0x40, 0x2b, /* jmp @r0 */
1781 0x00, 0x09, /* nop */
1782 0, 0, 0, 0, /* 0: replaced with offset of this symbol in .got. */
1783 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1784 0x51, 0xc2, /* mov.l @(8,r12),r1 */
1785 0x41, 0x2b, /* jmp @r1 */
1786 0x00, 0x09, /* nop */
1787 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1788 };
1789
1790 static const bfd_byte vxworks_sh_pic_plt_entry_le[VXWORKS_PLT_ENTRY_SIZE] =
1791 {
1792 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1793 0xce, 0x00, /* mov.l @(r0,r12),r0 */
1794 0x2b, 0x40, /* jmp @r0 */
1795 0x09, 0x00, /* nop */
1796 0, 0, 0, 0, /* 0: replaced with offset of this symbol in .got. */
1797 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1798 0xc2, 0x51, /* mov.l @(8,r12),r1 */
1799 0x2b, 0x41, /* jmp @r1 */
1800 0x09, 0x00, /* nop */
1801 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1802 };
1803
1804 static const struct elf_sh_plt_info vxworks_sh_plts[2][2] = {
1805 {
1806 {
1807 /* Big-endian non-PIC. */
1808 vxworks_sh_plt0_entry_be,
1809 VXWORKS_PLT_HEADER_SIZE,
1810 { MINUS_ONE, MINUS_ONE, 8 },
1811 vxworks_sh_plt_entry_be,
1812 VXWORKS_PLT_ENTRY_SIZE,
1813 { 8, 14, 20, false },
1814 12,
1815 NULL
1816 },
1817 {
1818 /* Little-endian non-PIC. */
1819 vxworks_sh_plt0_entry_le,
1820 VXWORKS_PLT_HEADER_SIZE,
1821 { MINUS_ONE, MINUS_ONE, 8 },
1822 vxworks_sh_plt_entry_le,
1823 VXWORKS_PLT_ENTRY_SIZE,
1824 { 8, 14, 20, false },
1825 12,
1826 NULL
1827 },
1828 },
1829 {
1830 {
1831 /* Big-endian PIC. */
1832 NULL,
1833 0,
1834 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1835 vxworks_sh_pic_plt_entry_be,
1836 VXWORKS_PLT_ENTRY_SIZE,
1837 { 8, MINUS_ONE, 20, false },
1838 12,
1839 NULL
1840 },
1841 {
1842 /* Little-endian PIC. */
1843 NULL,
1844 0,
1845 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1846 vxworks_sh_pic_plt_entry_le,
1847 VXWORKS_PLT_ENTRY_SIZE,
1848 { 8, MINUS_ONE, 20, false },
1849 12,
1850 NULL
1851 },
1852 }
1853 };
1854
1855 /* FDPIC PLT entries. Two unimplemented optimizations for lazy
1856 binding are to omit the lazy binding stub when linking with -z now
1857 and to move lazy binding stubs into a separate region for better
1858 cache behavior. */
1859
1860 #define FDPIC_PLT_ENTRY_SIZE 28
1861 #define FDPIC_PLT_LAZY_OFFSET 20
1862
1863 /* FIXME: The lazy binding stub requires a plt0 - which may need to be
1864 duplicated if it is out of range, or which can be inlined. So
1865 right now it is always inlined, which wastes a word per stub. It
1866 might be easier to handle the duplication if we put the lazy
1867 stubs separately. */
1868
1869 static const bfd_byte fdpic_sh_plt_entry_be[FDPIC_PLT_ENTRY_SIZE] =
1870 {
1871 0xd0, 0x02, /* mov.l @(12,pc),r0 */
1872 0x01, 0xce, /* mov.l @(r0,r12),r1 */
1873 0x70, 0x04, /* add #4, r0 */
1874 0x41, 0x2b, /* jmp @r1 */
1875 0x0c, 0xce, /* mov.l @(r0,r12),r12 */
1876 0x00, 0x09, /* nop */
1877 0, 0, 0, 0, /* 0: replaced with offset of this symbol's funcdesc */
1878 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1879 0x60, 0xc2, /* mov.l @r12,r0 */
1880 0x40, 0x2b, /* jmp @r0 */
1881 0x53, 0xc1, /* mov.l @(4,r12),r3 */
1882 0x00, 0x09, /* nop */
1883 };
1884
1885 static const bfd_byte fdpic_sh_plt_entry_le[FDPIC_PLT_ENTRY_SIZE] =
1886 {
1887 0x02, 0xd0, /* mov.l @(12,pc),r0 */
1888 0xce, 0x01, /* mov.l @(r0,r12),r1 */
1889 0x04, 0x70, /* add #4, r0 */
1890 0x2b, 0x41, /* jmp @r1 */
1891 0xce, 0x0c, /* mov.l @(r0,r12),r12 */
1892 0x09, 0x00, /* nop */
1893 0, 0, 0, 0, /* 0: replaced with offset of this symbol's funcdesc */
1894 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1895 0xc2, 0x60, /* mov.l @r12,r0 */
1896 0x2b, 0x40, /* jmp @r0 */
1897 0xc1, 0x53, /* mov.l @(4,r12),r3 */
1898 0x09, 0x00, /* nop */
1899 };
1900
1901 static const struct elf_sh_plt_info fdpic_sh_plts[2] = {
1902 {
1903 /* Big-endian PIC. */
1904 NULL,
1905 0,
1906 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1907 fdpic_sh_plt_entry_be,
1908 FDPIC_PLT_ENTRY_SIZE,
1909 { 12, MINUS_ONE, 16, false },
1910 FDPIC_PLT_LAZY_OFFSET,
1911 NULL
1912 },
1913 {
1914 /* Little-endian PIC. */
1915 NULL,
1916 0,
1917 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1918 fdpic_sh_plt_entry_le,
1919 FDPIC_PLT_ENTRY_SIZE,
1920 { 12, MINUS_ONE, 16, false },
1921 FDPIC_PLT_LAZY_OFFSET,
1922 NULL
1923 },
1924 };
1925
1926 /* On SH2A, we can use the movi20 instruction to generate shorter PLT
1927 entries for the first 64K slots. We use the normal FDPIC PLT entry
1928 past that point; we could also use movi20s, which might be faster,
1929 but would not be any smaller. */
1930
1931 #define FDPIC_SH2A_PLT_ENTRY_SIZE 24
1932 #define FDPIC_SH2A_PLT_LAZY_OFFSET 16
1933
1934 static const bfd_byte fdpic_sh2a_plt_entry_be[FDPIC_SH2A_PLT_ENTRY_SIZE] =
1935 {
1936 0, 0, 0, 0, /* movi20 #gotofffuncdesc,r0 */
1937 0x01, 0xce, /* mov.l @(r0,r12),r1 */
1938 0x70, 0x04, /* add #4, r0 */
1939 0x41, 0x2b, /* jmp @r1 */
1940 0x0c, 0xce, /* mov.l @(r0,r12),r12 */
1941 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1942 0x60, 0xc2, /* mov.l @r12,r0 */
1943 0x40, 0x2b, /* jmp @r0 */
1944 0x53, 0xc1, /* mov.l @(4,r12),r3 */
1945 0x00, 0x09, /* nop */
1946 };
1947
1948 static const bfd_byte fdpic_sh2a_plt_entry_le[FDPIC_SH2A_PLT_ENTRY_SIZE] =
1949 {
1950 0, 0, 0, 0, /* movi20 #gotofffuncdesc,r0 */
1951 0xce, 0x01, /* mov.l @(r0,r12),r1 */
1952 0x04, 0x70, /* add #4, r0 */
1953 0x2b, 0x41, /* jmp @r1 */
1954 0xce, 0x0c, /* mov.l @(r0,r12),r12 */
1955 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1956 0xc2, 0x60, /* mov.l @r12,r0 */
1957 0x2b, 0x40, /* jmp @r0 */
1958 0xc1, 0x53, /* mov.l @(4,r12),r3 */
1959 0x09, 0x00, /* nop */
1960 };
1961
1962 static const struct elf_sh_plt_info fdpic_sh2a_short_plt_be = {
1963 /* Big-endian FDPIC, max index 64K. */
1964 NULL,
1965 0,
1966 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1967 fdpic_sh2a_plt_entry_be,
1968 FDPIC_SH2A_PLT_ENTRY_SIZE,
1969 { 0, MINUS_ONE, 12, true },
1970 FDPIC_SH2A_PLT_LAZY_OFFSET,
1971 NULL
1972 };
1973
1974 static const struct elf_sh_plt_info fdpic_sh2a_short_plt_le = {
1975 /* Little-endian FDPIC, max index 64K. */
1976 NULL,
1977 0,
1978 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1979 fdpic_sh2a_plt_entry_le,
1980 FDPIC_SH2A_PLT_ENTRY_SIZE,
1981 { 0, MINUS_ONE, 12, true },
1982 FDPIC_SH2A_PLT_LAZY_OFFSET,
1983 NULL
1984 };
1985
1986 static const struct elf_sh_plt_info fdpic_sh2a_plts[2] = {
1987 {
1988 /* Big-endian PIC. */
1989 NULL,
1990 0,
1991 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1992 fdpic_sh_plt_entry_be,
1993 FDPIC_PLT_ENTRY_SIZE,
1994 { 12, MINUS_ONE, 16, false },
1995 FDPIC_PLT_LAZY_OFFSET,
1996 &fdpic_sh2a_short_plt_be
1997 },
1998 {
1999 /* Little-endian PIC. */
2000 NULL,
2001 0,
2002 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
2003 fdpic_sh_plt_entry_le,
2004 FDPIC_PLT_ENTRY_SIZE,
2005 { 12, MINUS_ONE, 16, false },
2006 FDPIC_PLT_LAZY_OFFSET,
2007 &fdpic_sh2a_short_plt_le
2008 },
2009 };
2010
2011 /* Return the type of PLT associated with ABFD. PIC_P is true if
2012 the object is position-independent. */
2013
2014 static const struct elf_sh_plt_info *
2015 get_plt_info (bfd *abfd, bool pic_p)
2016 {
2017 if (fdpic_object_p (abfd))
2018 {
2019 /* If any input file requires SH2A we can use a shorter PLT
2020 sequence. */
2021 if (sh_get_arch_from_bfd_mach (bfd_get_mach (abfd)) & arch_sh2a_base)
2022 return &fdpic_sh2a_plts[!bfd_big_endian (abfd)];
2023 else
2024 return &fdpic_sh_plts[!bfd_big_endian (abfd)];
2025 }
2026 if (vxworks_object_p (abfd))
2027 return &vxworks_sh_plts[pic_p][!bfd_big_endian (abfd)];
2028 return &elf_sh_plts[pic_p][!bfd_big_endian (abfd)];
2029 }
2030
2031 /* Install a 32-bit PLT field starting at ADDR, which occurs in OUTPUT_BFD.
2032 VALUE is the field's value and CODE_P is true if VALUE refers to code,
2033 not data. */
2034
2035 inline static void
2036 install_plt_field (bfd *output_bfd, bool code_p ATTRIBUTE_UNUSED,
2037 unsigned long value, bfd_byte *addr)
2038 {
2039 bfd_put_32 (output_bfd, value, addr);
2040 }
2041
2042 /* The number of PLT entries which can use a shorter PLT, if any.
2043 Currently always 64K, since only SH-2A FDPIC uses this; a
2044 20-bit movi20 can address that many function descriptors below
2045 _GLOBAL_OFFSET_TABLE_. */
2046 #define MAX_SHORT_PLT 65536
2047
2048 /* Return the index of the PLT entry at byte offset OFFSET. */
2049
2050 static bfd_vma
2051 get_plt_index (const struct elf_sh_plt_info *info, bfd_vma offset)
2052 {
2053 bfd_vma plt_index = 0;
2054
2055 offset -= info->plt0_entry_size;
2056 if (info->short_plt != NULL)
2057 {
2058 if (offset > MAX_SHORT_PLT * info->short_plt->symbol_entry_size)
2059 {
2060 plt_index = MAX_SHORT_PLT;
2061 offset -= MAX_SHORT_PLT * info->short_plt->symbol_entry_size;
2062 }
2063 else
2064 info = info->short_plt;
2065 }
2066 return plt_index + offset / info->symbol_entry_size;
2067 }
2068
2069 /* Do the inverse operation. */
2070
2071 static bfd_vma
2072 get_plt_offset (const struct elf_sh_plt_info *info, bfd_vma plt_index)
2073 {
2074 bfd_vma offset = 0;
2075
2076 if (info->short_plt != NULL)
2077 {
2078 if (plt_index > MAX_SHORT_PLT)
2079 {
2080 offset = MAX_SHORT_PLT * info->short_plt->symbol_entry_size;
2081 plt_index -= MAX_SHORT_PLT;
2082 }
2083 else
2084 info = info->short_plt;
2085 }
2086 return (offset + info->plt0_entry_size
2087 + (plt_index * info->symbol_entry_size));
2088 }
2089
2090 union gotref
2091 {
2092 bfd_signed_vma refcount;
2093 bfd_vma offset;
2094 };
2095
2096 /* sh ELF linker hash entry. */
2097
2098 struct elf_sh_link_hash_entry
2099 {
2100 struct elf_link_hash_entry root;
2101
2102 bfd_signed_vma gotplt_refcount;
2103
2104 /* A local function descriptor, for FDPIC. The refcount counts
2105 R_SH_FUNCDESC, R_SH_GOTOFFFUNCDESC, and R_SH_GOTOFFFUNCDESC20
2106 relocations; the PLT and GOT entry are accounted
2107 for separately. After adjust_dynamic_symbol, the offset is
2108 MINUS_ONE if there is no local descriptor (dynamic linker
2109 managed and no PLT entry, or undefined weak non-dynamic).
2110 During check_relocs we do not yet know whether the local
2111 descriptor will be canonical. */
2112 union gotref funcdesc;
2113
2114 /* How many of the above refcounted relocations were R_SH_FUNCDESC,
2115 and thus require fixups or relocations. */
2116 bfd_signed_vma abs_funcdesc_refcount;
2117
2118 enum got_type {
2119 GOT_UNKNOWN = 0, GOT_NORMAL, GOT_TLS_GD, GOT_TLS_IE, GOT_FUNCDESC
2120 } got_type;
2121 };
2122
2123 #define sh_elf_hash_entry(ent) ((struct elf_sh_link_hash_entry *)(ent))
2124
2125 struct sh_elf_obj_tdata
2126 {
2127 struct elf_obj_tdata root;
2128
2129 /* got_type for each local got entry. */
2130 char *local_got_type;
2131
2132 /* Function descriptor refcount and offset for each local symbol. */
2133 union gotref *local_funcdesc;
2134 };
2135
2136 #define sh_elf_tdata(abfd) \
2137 ((struct sh_elf_obj_tdata *) (abfd)->tdata.any)
2138
2139 #define sh_elf_local_got_type(abfd) \
2140 (sh_elf_tdata (abfd)->local_got_type)
2141
2142 #define sh_elf_local_funcdesc(abfd) \
2143 (sh_elf_tdata (abfd)->local_funcdesc)
2144
2145 #define is_sh_elf(bfd) \
2146 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2147 && elf_tdata (bfd) != NULL \
2148 && elf_object_id (bfd) == SH_ELF_DATA)
2149
2150 /* Override the generic function because we need to store sh_elf_obj_tdata
2151 as the specific tdata. */
2152
2153 static bool
2154 sh_elf_mkobject (bfd *abfd)
2155 {
2156 return bfd_elf_allocate_object (abfd, sizeof (struct sh_elf_obj_tdata),
2157 SH_ELF_DATA);
2158 }
2159
2160 /* sh ELF linker hash table. */
2161
2162 struct elf_sh_link_hash_table
2163 {
2164 struct elf_link_hash_table root;
2165
2166 /* Short-cuts to get to dynamic linker sections. */
2167 asection *sfuncdesc;
2168 asection *srelfuncdesc;
2169 asection *srofixup;
2170
2171 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2172 asection *srelplt2;
2173
2174 /* A counter or offset to track a TLS got entry. */
2175 union
2176 {
2177 bfd_signed_vma refcount;
2178 bfd_vma offset;
2179 } tls_ldm_got;
2180
2181 /* The type of PLT to use. */
2182 const struct elf_sh_plt_info *plt_info;
2183
2184 /* True if the target system uses FDPIC. */
2185 bool fdpic_p;
2186 };
2187
2188 /* Traverse an sh ELF linker hash table. */
2189
2190 #define sh_elf_link_hash_traverse(table, func, info) \
2191 (elf_link_hash_traverse \
2192 (&(table)->root, \
2193 (bool (*) (struct elf_link_hash_entry *, void *)) (func), \
2194 (info)))
2195
2196 /* Get the sh ELF linker hash table from a link_info structure. */
2197
2198 #define sh_elf_hash_table(p) \
2199 ((is_elf_hash_table ((p)->hash) \
2200 && elf_hash_table_id (elf_hash_table (p)) == SH_ELF_DATA) \
2201 ? (struct elf_sh_link_hash_table *) (p)->hash : NULL)
2202
2203 /* Create an entry in an sh ELF linker hash table. */
2204
2205 static struct bfd_hash_entry *
2206 sh_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2207 struct bfd_hash_table *table,
2208 const char *string)
2209 {
2210 struct elf_sh_link_hash_entry *ret =
2211 (struct elf_sh_link_hash_entry *) entry;
2212
2213 /* Allocate the structure if it has not already been allocated by a
2214 subclass. */
2215 if (ret == (struct elf_sh_link_hash_entry *) NULL)
2216 ret = ((struct elf_sh_link_hash_entry *)
2217 bfd_hash_allocate (table,
2218 sizeof (struct elf_sh_link_hash_entry)));
2219 if (ret == (struct elf_sh_link_hash_entry *) NULL)
2220 return (struct bfd_hash_entry *) ret;
2221
2222 /* Call the allocation method of the superclass. */
2223 ret = ((struct elf_sh_link_hash_entry *)
2224 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2225 table, string));
2226 if (ret != (struct elf_sh_link_hash_entry *) NULL)
2227 {
2228 ret->gotplt_refcount = 0;
2229 ret->funcdesc.refcount = 0;
2230 ret->abs_funcdesc_refcount = 0;
2231 ret->got_type = GOT_UNKNOWN;
2232 }
2233
2234 return (struct bfd_hash_entry *) ret;
2235 }
2236
2237 /* Create an sh ELF linker hash table. */
2238
2239 static struct bfd_link_hash_table *
2240 sh_elf_link_hash_table_create (bfd *abfd)
2241 {
2242 struct elf_sh_link_hash_table *ret;
2243 size_t amt = sizeof (struct elf_sh_link_hash_table);
2244
2245 ret = (struct elf_sh_link_hash_table *) bfd_zmalloc (amt);
2246 if (ret == (struct elf_sh_link_hash_table *) NULL)
2247 return NULL;
2248
2249 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
2250 sh_elf_link_hash_newfunc,
2251 sizeof (struct elf_sh_link_hash_entry),
2252 SH_ELF_DATA))
2253 {
2254 free (ret);
2255 return NULL;
2256 }
2257
2258 if (fdpic_object_p (abfd))
2259 {
2260 ret->root.dt_pltgot_required = true;
2261 ret->fdpic_p = true;
2262 }
2263
2264 return &ret->root.root;
2265 }
2266
2267 static bool
2268 sh_elf_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
2269 struct bfd_link_info *info, asection *p)
2270 {
2271 struct elf_sh_link_hash_table *htab = sh_elf_hash_table (info);
2272
2273 /* Non-FDPIC binaries do not need dynamic symbols for sections. */
2274 if (!htab->fdpic_p)
2275 return true;
2276
2277 /* We need dynamic symbols for every section, since segments can
2278 relocate independently. */
2279 switch (elf_section_data (p)->this_hdr.sh_type)
2280 {
2281 case SHT_PROGBITS:
2282 case SHT_NOBITS:
2283 /* If sh_type is yet undecided, assume it could be
2284 SHT_PROGBITS/SHT_NOBITS. */
2285 case SHT_NULL:
2286 return false;
2287
2288 /* There shouldn't be section relative relocations
2289 against any other section. */
2290 default:
2291 return true;
2292 }
2293 }
2294
2295 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2296 shortcuts to them in our hash table. */
2297
2298 static bool
2299 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2300 {
2301 struct elf_sh_link_hash_table *htab;
2302
2303 if (! _bfd_elf_create_got_section (dynobj, info))
2304 return false;
2305
2306 htab = sh_elf_hash_table (info);
2307 if (htab == NULL)
2308 return false;
2309
2310 htab->sfuncdesc = bfd_make_section_anyway_with_flags (dynobj, ".got.funcdesc",
2311 (SEC_ALLOC | SEC_LOAD
2312 | SEC_HAS_CONTENTS
2313 | SEC_IN_MEMORY
2314 | SEC_LINKER_CREATED));
2315 if (htab->sfuncdesc == NULL
2316 || !bfd_set_section_alignment (htab->sfuncdesc, 2))
2317 return false;
2318
2319 htab->srelfuncdesc = bfd_make_section_anyway_with_flags (dynobj,
2320 ".rela.got.funcdesc",
2321 (SEC_ALLOC | SEC_LOAD
2322 | SEC_HAS_CONTENTS
2323 | SEC_IN_MEMORY
2324 | SEC_LINKER_CREATED
2325 | SEC_READONLY));
2326 if (htab->srelfuncdesc == NULL
2327 || !bfd_set_section_alignment (htab->srelfuncdesc, 2))
2328 return false;
2329
2330 /* Also create .rofixup. */
2331 htab->srofixup = bfd_make_section_anyway_with_flags (dynobj, ".rofixup",
2332 (SEC_ALLOC | SEC_LOAD
2333 | SEC_HAS_CONTENTS
2334 | SEC_IN_MEMORY
2335 | SEC_LINKER_CREATED
2336 | SEC_READONLY));
2337 if (htab->srofixup == NULL
2338 || !bfd_set_section_alignment (htab->srofixup, 2))
2339 return false;
2340
2341 return true;
2342 }
2343
2344 /* Create dynamic sections when linking against a dynamic object. */
2345
2346 static bool
2347 sh_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2348 {
2349 struct elf_sh_link_hash_table *htab;
2350 flagword flags, pltflags;
2351 asection *s;
2352 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2353 int ptralign = 0;
2354
2355 switch (bed->s->arch_size)
2356 {
2357 case 32:
2358 ptralign = 2;
2359 break;
2360
2361 case 64:
2362 ptralign = 3;
2363 break;
2364
2365 default:
2366 bfd_set_error (bfd_error_bad_value);
2367 return false;
2368 }
2369
2370 htab = sh_elf_hash_table (info);
2371 if (htab == NULL)
2372 return false;
2373
2374 if (htab->root.dynamic_sections_created)
2375 return true;
2376
2377 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2378 .rel[a].bss sections. */
2379
2380 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2381 | SEC_LINKER_CREATED);
2382
2383 pltflags = flags;
2384 pltflags |= SEC_CODE;
2385 if (bed->plt_not_loaded)
2386 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
2387 if (bed->plt_readonly)
2388 pltflags |= SEC_READONLY;
2389
2390 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
2391 htab->root.splt = s;
2392 if (s == NULL
2393 || !bfd_set_section_alignment (s, bed->plt_alignment))
2394 return false;
2395
2396 if (bed->want_plt_sym)
2397 {
2398 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2399 .plt section. */
2400 struct elf_link_hash_entry *h;
2401 struct bfd_link_hash_entry *bh = NULL;
2402
2403 if (! (_bfd_generic_link_add_one_symbol
2404 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2405 (bfd_vma) 0, (const char *) NULL, false,
2406 get_elf_backend_data (abfd)->collect, &bh)))
2407 return false;
2408
2409 h = (struct elf_link_hash_entry *) bh;
2410 h->def_regular = 1;
2411 h->type = STT_OBJECT;
2412 htab->root.hplt = h;
2413
2414 if (bfd_link_pic (info)
2415 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2416 return false;
2417 }
2418
2419 s = bfd_make_section_anyway_with_flags (abfd,
2420 bed->default_use_rela_p
2421 ? ".rela.plt" : ".rel.plt",
2422 flags | SEC_READONLY);
2423 htab->root.srelplt = s;
2424 if (s == NULL
2425 || !bfd_set_section_alignment (s, ptralign))
2426 return false;
2427
2428 if (htab->root.sgot == NULL
2429 && !create_got_section (abfd, info))
2430 return false;
2431
2432 if (bed->want_dynbss)
2433 {
2434 /* The .dynbss section is a place to put symbols which are defined
2435 by dynamic objects, are referenced by regular objects, and are
2436 not functions. We must allocate space for them in the process
2437 image and use a R_*_COPY reloc to tell the dynamic linker to
2438 initialize them at run time. The linker script puts the .dynbss
2439 section into the .bss section of the final image. */
2440 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
2441 SEC_ALLOC | SEC_LINKER_CREATED);
2442 htab->root.sdynbss = s;
2443 if (s == NULL)
2444 return false;
2445
2446 /* The .rel[a].bss section holds copy relocs. This section is not
2447 normally needed. We need to create it here, though, so that the
2448 linker will map it to an output section. We can't just create it
2449 only if we need it, because we will not know whether we need it
2450 until we have seen all the input files, and the first time the
2451 main linker code calls BFD after examining all the input files
2452 (size_dynamic_sections) the input sections have already been
2453 mapped to the output sections. If the section turns out not to
2454 be needed, we can discard it later. We will never need this
2455 section when generating a shared object, since they do not use
2456 copy relocs. */
2457 if (! bfd_link_pic (info))
2458 {
2459 s = bfd_make_section_anyway_with_flags (abfd,
2460 (bed->default_use_rela_p
2461 ? ".rela.bss" : ".rel.bss"),
2462 flags | SEC_READONLY);
2463 htab->root.srelbss = s;
2464 if (s == NULL
2465 || !bfd_set_section_alignment (s, ptralign))
2466 return false;
2467 }
2468 }
2469
2470 if (htab->root.target_os == is_vxworks)
2471 {
2472 if (!elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2473 return false;
2474 }
2475
2476 return true;
2477 }
2478
2479 /* Adjust a symbol defined by a dynamic object and referenced by a
2481 regular object. The current definition is in some section of the
2482 dynamic object, but we're not including those sections. We have to
2483 change the definition to something the rest of the link can
2484 understand. */
2485
2486 static bool
2487 sh_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2488 struct elf_link_hash_entry *h)
2489 {
2490 struct elf_sh_link_hash_table *htab;
2491 asection *s;
2492
2493 htab = sh_elf_hash_table (info);
2494 if (htab == NULL)
2495 return false;
2496
2497 /* Make sure we know what is going on here. */
2498 BFD_ASSERT (htab->root.dynobj != NULL
2499 && (h->needs_plt
2500 || h->is_weakalias
2501 || (h->def_dynamic
2502 && h->ref_regular
2503 && !h->def_regular)));
2504
2505 /* If this is a function, put it in the procedure linkage table. We
2506 will fill in the contents of the procedure linkage table later,
2507 when we know the address of the .got section. */
2508 if (h->type == STT_FUNC
2509 || h->needs_plt)
2510 {
2511 if (h->plt.refcount <= 0
2512 || SYMBOL_CALLS_LOCAL (info, h)
2513 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2514 && h->root.type == bfd_link_hash_undefweak))
2515 {
2516 /* This case can occur if we saw a PLT reloc in an input
2517 file, but the symbol was never referred to by a dynamic
2518 object. In such a case, we don't actually need to build
2519 a procedure linkage table, and we can just do a REL32
2520 reloc instead. */
2521 h->plt.offset = (bfd_vma) -1;
2522 h->needs_plt = 0;
2523 }
2524
2525 return true;
2526 }
2527 else
2528 h->plt.offset = (bfd_vma) -1;
2529
2530 /* If this is a weak symbol, and there is a real definition, the
2531 processor independent code will have arranged for us to see the
2532 real definition first, and we can just use the same value. */
2533 if (h->is_weakalias)
2534 {
2535 struct elf_link_hash_entry *def = weakdef (h);
2536 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2537 h->root.u.def.section = def->root.u.def.section;
2538 h->root.u.def.value = def->root.u.def.value;
2539 if (info->nocopyreloc)
2540 h->non_got_ref = def->non_got_ref;
2541 return true;
2542 }
2543
2544 /* This is a reference to a symbol defined by a dynamic object which
2545 is not a function. */
2546
2547 /* If we are creating a shared library, we must presume that the
2548 only references to the symbol are via the global offset table.
2549 For such cases we need not do anything here; the relocations will
2550 be handled correctly by relocate_section. */
2551 if (bfd_link_pic (info))
2552 return true;
2553
2554 /* If there are no references to this symbol that do not use the
2555 GOT, we don't need to generate a copy reloc. */
2556 if (!h->non_got_ref)
2557 return true;
2558
2559 /* If -z nocopyreloc was given, we won't generate them either. */
2560 if (0 && info->nocopyreloc)
2561 {
2562 h->non_got_ref = 0;
2563 return true;
2564 }
2565
2566 /* If we don't find any dynamic relocs in read-only sections, then
2567 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2568 if (0 && !_bfd_elf_readonly_dynrelocs (h))
2569 {
2570 h->non_got_ref = 0;
2571 return true;
2572 }
2573
2574 /* We must allocate the symbol in our .dynbss section, which will
2575 become part of the .bss section of the executable. There will be
2576 an entry for this symbol in the .dynsym section. The dynamic
2577 object will contain position independent code, so all references
2578 from the dynamic object to this symbol will go through the global
2579 offset table. The dynamic linker will use the .dynsym entry to
2580 determine the address it must put in the global offset table, so
2581 both the dynamic object and the regular object will refer to the
2582 same memory location for the variable. */
2583
2584 s = htab->root.sdynbss;
2585 BFD_ASSERT (s != NULL);
2586
2587 /* We must generate a R_SH_COPY reloc to tell the dynamic linker to
2588 copy the initial value out of the dynamic object and into the
2589 runtime process image. We need to remember the offset into the
2590 .rela.bss section we are going to use. */
2591 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2592 {
2593 asection *srel;
2594
2595 srel = htab->root.srelbss;
2596 BFD_ASSERT (srel != NULL);
2597 srel->size += sizeof (Elf32_External_Rela);
2598 h->needs_copy = 1;
2599 }
2600
2601 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2602 }
2603
2604 /* Allocate space in .plt, .got and associated reloc sections for
2605 dynamic relocs. */
2606
2607 static bool
2608 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2609 {
2610 struct bfd_link_info *info;
2611 struct elf_sh_link_hash_table *htab;
2612 struct elf_sh_link_hash_entry *eh;
2613 struct elf_dyn_relocs *p;
2614
2615 if (h->root.type == bfd_link_hash_indirect)
2616 return true;
2617
2618 info = (struct bfd_link_info *) inf;
2619 htab = sh_elf_hash_table (info);
2620 if (htab == NULL)
2621 return false;
2622
2623 eh = (struct elf_sh_link_hash_entry *) h;
2624 if ((h->got.refcount > 0
2625 || h->forced_local)
2626 && eh->gotplt_refcount > 0)
2627 {
2628 /* The symbol has been forced local, or we have some direct got refs,
2629 so treat all the gotplt refs as got refs. */
2630 h->got.refcount += eh->gotplt_refcount;
2631 if (h->plt.refcount >= eh->gotplt_refcount)
2632 h->plt.refcount -= eh->gotplt_refcount;
2633 }
2634
2635 if (htab->root.dynamic_sections_created
2636 && h->plt.refcount > 0
2637 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2638 || h->root.type != bfd_link_hash_undefweak))
2639 {
2640 /* Make sure this symbol is output as a dynamic symbol.
2641 Undefined weak syms won't yet be marked as dynamic. */
2642 if (h->dynindx == -1
2643 && !h->forced_local)
2644 {
2645 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2646 return false;
2647 }
2648
2649 if (bfd_link_pic (info)
2650 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2651 {
2652 asection *s = htab->root.splt;
2653 const struct elf_sh_plt_info *plt_info;
2654
2655 /* If this is the first .plt entry, make room for the special
2656 first entry. */
2657 if (s->size == 0)
2658 s->size += htab->plt_info->plt0_entry_size;
2659
2660 h->plt.offset = s->size;
2661
2662 /* If this symbol is not defined in a regular file, and we are
2663 not generating a shared library, then set the symbol to this
2664 location in the .plt. This is required to make function
2665 pointers compare as equal between the normal executable and
2666 the shared library. Skip this for FDPIC, since the
2667 function's address will be the address of the canonical
2668 function descriptor. */
2669 if (!htab->fdpic_p && !bfd_link_pic (info) && !h->def_regular)
2670 {
2671 h->root.u.def.section = s;
2672 h->root.u.def.value = h->plt.offset;
2673 }
2674
2675 /* Make room for this entry. */
2676 plt_info = htab->plt_info;
2677 if (plt_info->short_plt != NULL
2678 && (get_plt_index (plt_info->short_plt, s->size) < MAX_SHORT_PLT))
2679 plt_info = plt_info->short_plt;
2680 s->size += plt_info->symbol_entry_size;
2681
2682 /* We also need to make an entry in the .got.plt section, which
2683 will be placed in the .got section by the linker script. */
2684 if (!htab->fdpic_p)
2685 htab->root.sgotplt->size += 4;
2686 else
2687 htab->root.sgotplt->size += 8;
2688
2689 /* We also need to make an entry in the .rel.plt section. */
2690 htab->root.srelplt->size += sizeof (Elf32_External_Rela);
2691
2692 if (htab->root.target_os == is_vxworks && !bfd_link_pic (info))
2693 {
2694 /* VxWorks executables have a second set of relocations
2695 for each PLT entry. They go in a separate relocation
2696 section, which is processed by the kernel loader. */
2697
2698 /* There is a relocation for the initial PLT entry:
2699 an R_SH_DIR32 relocation for _GLOBAL_OFFSET_TABLE_. */
2700 if (h->plt.offset == htab->plt_info->plt0_entry_size)
2701 htab->srelplt2->size += sizeof (Elf32_External_Rela);
2702
2703 /* There are two extra relocations for each subsequent
2704 PLT entry: an R_SH_DIR32 relocation for the GOT entry,
2705 and an R_SH_DIR32 relocation for the PLT entry. */
2706 htab->srelplt2->size += sizeof (Elf32_External_Rela) * 2;
2707 }
2708 }
2709 else
2710 {
2711 h->plt.offset = (bfd_vma) -1;
2712 h->needs_plt = 0;
2713 }
2714 }
2715 else
2716 {
2717 h->plt.offset = (bfd_vma) -1;
2718 h->needs_plt = 0;
2719 }
2720
2721 if (h->got.refcount > 0)
2722 {
2723 asection *s;
2724 bool dyn;
2725 enum got_type got_type = sh_elf_hash_entry (h)->got_type;
2726
2727 /* Make sure this symbol is output as a dynamic symbol.
2728 Undefined weak syms won't yet be marked as dynamic. */
2729 if (h->dynindx == -1
2730 && !h->forced_local)
2731 {
2732 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2733 return false;
2734 }
2735
2736 s = htab->root.sgot;
2737 h->got.offset = s->size;
2738 s->size += 4;
2739 /* R_SH_TLS_GD needs 2 consecutive GOT slots. */
2740 if (got_type == GOT_TLS_GD)
2741 s->size += 4;
2742 dyn = htab->root.dynamic_sections_created;
2743 if (!dyn)
2744 {
2745 /* No dynamic relocations required. */
2746 if (htab->fdpic_p && !bfd_link_pic (info)
2747 && h->root.type != bfd_link_hash_undefweak
2748 && (got_type == GOT_NORMAL || got_type == GOT_FUNCDESC))
2749 htab->srofixup->size += 4;
2750 }
2751 /* No dynamic relocations required when IE->LE conversion happens. */
2752 else if (got_type == GOT_TLS_IE
2753 && !h->def_dynamic
2754 && !bfd_link_pic (info))
2755 ;
2756 /* R_SH_TLS_IE_32 needs one dynamic relocation if dynamic,
2757 R_SH_TLS_GD needs one if local symbol and two if global. */
2758 else if ((got_type == GOT_TLS_GD && h->dynindx == -1)
2759 || got_type == GOT_TLS_IE)
2760 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
2761 else if (got_type == GOT_TLS_GD)
2762 htab->root.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2763 else if (got_type == GOT_FUNCDESC)
2764 {
2765 if (!bfd_link_pic (info) && SYMBOL_FUNCDESC_LOCAL (info, h))
2766 htab->srofixup->size += 4;
2767 else
2768 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
2769 }
2770 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2771 || h->root.type != bfd_link_hash_undefweak)
2772 && (bfd_link_pic (info)
2773 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2774 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
2775 else if (htab->fdpic_p
2776 && !bfd_link_pic (info)
2777 && got_type == GOT_NORMAL
2778 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2779 || h->root.type != bfd_link_hash_undefweak))
2780 htab->srofixup->size += 4;
2781 }
2782 else
2783 h->got.offset = (bfd_vma) -1;
2784
2785 /* Allocate space for any dynamic relocations to function
2786 descriptors, canonical or otherwise. We need to relocate the
2787 reference unless it resolves to zero, which only happens for
2788 undefined weak symbols (either non-default visibility, or when
2789 static linking). Any GOT slot is accounted for elsewhere. */
2790 if (eh->abs_funcdesc_refcount > 0
2791 && (h->root.type != bfd_link_hash_undefweak
2792 || (htab->root.dynamic_sections_created
2793 && ! SYMBOL_CALLS_LOCAL (info, h))))
2794 {
2795 if (!bfd_link_pic (info) && SYMBOL_FUNCDESC_LOCAL (info, h))
2796 htab->srofixup->size += eh->abs_funcdesc_refcount * 4;
2797 else
2798 htab->root.srelgot->size
2799 += eh->abs_funcdesc_refcount * sizeof (Elf32_External_Rela);
2800 }
2801
2802 /* We must allocate a function descriptor if there are references to
2803 a canonical descriptor (R_SH_GOTFUNCDESC or R_SH_FUNCDESC) and
2804 the dynamic linker isn't going to allocate it. None of this
2805 applies if we already created one in .got.plt, but if the
2806 canonical function descriptor can be in this object, there
2807 won't be a PLT entry at all. */
2808 if ((eh->funcdesc.refcount > 0
2809 || (h->got.offset != MINUS_ONE && eh->got_type == GOT_FUNCDESC))
2810 && h->root.type != bfd_link_hash_undefweak
2811 && SYMBOL_FUNCDESC_LOCAL (info, h))
2812 {
2813 /* Make room for this function descriptor. */
2814 eh->funcdesc.offset = htab->sfuncdesc->size;
2815 htab->sfuncdesc->size += 8;
2816
2817 /* We will need a relocation or two fixups to initialize the
2818 function descriptor, so allocate those too. */
2819 if (!bfd_link_pic (info) && SYMBOL_CALLS_LOCAL (info, h))
2820 htab->srofixup->size += 8;
2821 else
2822 htab->srelfuncdesc->size += sizeof (Elf32_External_Rela);
2823 }
2824
2825 if (h->dyn_relocs == NULL)
2826 return true;
2827
2828 /* In the shared -Bsymbolic case, discard space allocated for
2829 dynamic pc-relative relocs against symbols which turn out to be
2830 defined in regular objects. For the normal shared case, discard
2831 space for pc-relative relocs that have become local due to symbol
2832 visibility changes. */
2833
2834 if (bfd_link_pic (info))
2835 {
2836 if (SYMBOL_CALLS_LOCAL (info, h))
2837 {
2838 struct elf_dyn_relocs **pp;
2839
2840 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
2841 {
2842 p->count -= p->pc_count;
2843 p->pc_count = 0;
2844 if (p->count == 0)
2845 *pp = p->next;
2846 else
2847 pp = &p->next;
2848 }
2849 }
2850
2851 if (htab->root.target_os == is_vxworks)
2852 {
2853 struct elf_dyn_relocs **pp;
2854
2855 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
2856 {
2857 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2858 *pp = p->next;
2859 else
2860 pp = &p->next;
2861 }
2862 }
2863
2864 /* Also discard relocs on undefined weak syms with non-default
2865 visibility. */
2866 if (h->dyn_relocs != NULL
2867 && h->root.type == bfd_link_hash_undefweak)
2868 {
2869 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2870 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2871 h->dyn_relocs = NULL;
2872
2873 /* Make sure undefined weak symbols are output as a dynamic
2874 symbol in PIEs. */
2875 else if (h->dynindx == -1
2876 && !h->forced_local)
2877 {
2878 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2879 return false;
2880 }
2881 }
2882 }
2883 else
2884 {
2885 /* For the non-shared case, discard space for relocs against
2886 symbols which turn out to need copy relocs or are not
2887 dynamic. */
2888
2889 if (!h->non_got_ref
2890 && ((h->def_dynamic
2891 && !h->def_regular)
2892 || (htab->root.dynamic_sections_created
2893 && (h->root.type == bfd_link_hash_undefweak
2894 || h->root.type == bfd_link_hash_undefined))))
2895 {
2896 /* Make sure this symbol is output as a dynamic symbol.
2897 Undefined weak syms won't yet be marked as dynamic. */
2898 if (h->dynindx == -1
2899 && !h->forced_local)
2900 {
2901 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2902 return false;
2903 }
2904
2905 /* If that succeeded, we know we'll be keeping all the
2906 relocs. */
2907 if (h->dynindx != -1)
2908 goto keep;
2909 }
2910
2911 h->dyn_relocs = NULL;
2912
2913 keep: ;
2914 }
2915
2916 /* Finally, allocate space. */
2917 for (p = h->dyn_relocs; p != NULL; p = p->next)
2918 {
2919 asection *sreloc = elf_section_data (p->sec)->sreloc;
2920 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2921
2922 /* If we need relocations, we do not need fixups. */
2923 if (htab->fdpic_p && !bfd_link_pic (info))
2924 htab->srofixup->size -= 4 * (p->count - p->pc_count);
2925 }
2926
2927 return true;
2928 }
2929
2930 /* This function is called after all the input files have been read,
2931 and the input sections have been assigned to output sections.
2932 It's a convenient place to determine the PLT style. */
2933
2934 static bool
2935 sh_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
2936 {
2937 sh_elf_hash_table (info)->plt_info = get_plt_info (output_bfd,
2938 bfd_link_pic (info));
2939
2940 if (sh_elf_hash_table (info)->fdpic_p && !bfd_link_relocatable (info)
2941 && !bfd_elf_stack_segment_size (output_bfd, info,
2942 "__stacksize", DEFAULT_STACK_SIZE))
2943 return false;
2944 return true;
2945 }
2946
2947 /* Set the sizes of the dynamic sections. */
2948
2949 static bool
2950 sh_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2951 struct bfd_link_info *info)
2952 {
2953 struct elf_sh_link_hash_table *htab;
2954 bfd *dynobj;
2955 asection *s;
2956 bool relocs;
2957 bfd *ibfd;
2958
2959 htab = sh_elf_hash_table (info);
2960 if (htab == NULL)
2961 return false;
2962
2963 dynobj = htab->root.dynobj;
2964 BFD_ASSERT (dynobj != NULL);
2965
2966 if (htab->root.dynamic_sections_created)
2967 {
2968 /* Set the contents of the .interp section to the interpreter. */
2969 if (bfd_link_executable (info) && !info->nointerp)
2970 {
2971 s = bfd_get_linker_section (dynobj, ".interp");
2972 BFD_ASSERT (s != NULL);
2973 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2974 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2975 }
2976 }
2977
2978 /* Set up .got offsets for local syms, and space for local dynamic
2979 relocs. */
2980 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2981 {
2982 bfd_signed_vma *local_got;
2983 bfd_signed_vma *end_local_got;
2984 union gotref *local_funcdesc, *end_local_funcdesc;
2985 char *local_got_type;
2986 bfd_size_type locsymcount;
2987 Elf_Internal_Shdr *symtab_hdr;
2988 asection *srel;
2989
2990 if (! is_sh_elf (ibfd))
2991 continue;
2992
2993 for (s = ibfd->sections; s != NULL; s = s->next)
2994 {
2995 struct elf_dyn_relocs *p;
2996
2997 for (p = ((struct elf_dyn_relocs *)
2998 elf_section_data (s)->local_dynrel);
2999 p != NULL;
3000 p = p->next)
3001 {
3002 if (! bfd_is_abs_section (p->sec)
3003 && bfd_is_abs_section (p->sec->output_section))
3004 {
3005 /* Input section has been discarded, either because
3006 it is a copy of a linkonce section or due to
3007 linker script /DISCARD/, so we'll be discarding
3008 the relocs too. */
3009 }
3010 else if (htab->root.target_os == is_vxworks
3011 && strcmp (p->sec->output_section->name,
3012 ".tls_vars") == 0)
3013 {
3014 /* Relocations in vxworks .tls_vars sections are
3015 handled specially by the loader. */
3016 }
3017 else if (p->count != 0)
3018 {
3019 srel = elf_section_data (p->sec)->sreloc;
3020 srel->size += p->count * sizeof (Elf32_External_Rela);
3021 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
3022 {
3023 info->flags |= DF_TEXTREL;
3024 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
3025 p->sec->owner, p->sec);
3026 }
3027
3028 /* If we need relocations, we do not need fixups. */
3029 if (htab->fdpic_p && !bfd_link_pic (info))
3030 htab->srofixup->size -= 4 * (p->count - p->pc_count);
3031 }
3032 }
3033 }
3034
3035 symtab_hdr = &elf_symtab_hdr (ibfd);
3036 locsymcount = symtab_hdr->sh_info;
3037 s = htab->root.sgot;
3038 srel = htab->root.srelgot;
3039
3040 local_got = elf_local_got_refcounts (ibfd);
3041 if (local_got)
3042 {
3043 end_local_got = local_got + locsymcount;
3044 local_got_type = sh_elf_local_got_type (ibfd);
3045 local_funcdesc = sh_elf_local_funcdesc (ibfd);
3046 for (; local_got < end_local_got; ++local_got)
3047 {
3048 if (*local_got > 0)
3049 {
3050 *local_got = s->size;
3051 s->size += 4;
3052 if (*local_got_type == GOT_TLS_GD)
3053 s->size += 4;
3054 if (bfd_link_pic (info))
3055 srel->size += sizeof (Elf32_External_Rela);
3056 else
3057 htab->srofixup->size += 4;
3058
3059 if (*local_got_type == GOT_FUNCDESC)
3060 {
3061 if (local_funcdesc == NULL)
3062 {
3063 bfd_size_type size;
3064
3065 size = locsymcount * sizeof (union gotref);
3066 local_funcdesc = (union gotref *) bfd_zalloc (ibfd,
3067 size);
3068 if (local_funcdesc == NULL)
3069 return false;
3070 sh_elf_local_funcdesc (ibfd) = local_funcdesc;
3071 local_funcdesc += (local_got
3072 - elf_local_got_refcounts (ibfd));
3073 }
3074 local_funcdesc->refcount++;
3075 ++local_funcdesc;
3076 }
3077 }
3078 else
3079 *local_got = (bfd_vma) -1;
3080 ++local_got_type;
3081 }
3082 }
3083
3084 local_funcdesc = sh_elf_local_funcdesc (ibfd);
3085 if (local_funcdesc)
3086 {
3087 end_local_funcdesc = local_funcdesc + locsymcount;
3088
3089 for (; local_funcdesc < end_local_funcdesc; ++local_funcdesc)
3090 {
3091 if (local_funcdesc->refcount > 0)
3092 {
3093 local_funcdesc->offset = htab->sfuncdesc->size;
3094 htab->sfuncdesc->size += 8;
3095 if (!bfd_link_pic (info))
3096 htab->srofixup->size += 8;
3097 else
3098 htab->srelfuncdesc->size += sizeof (Elf32_External_Rela);
3099 }
3100 else
3101 local_funcdesc->offset = MINUS_ONE;
3102 }
3103 }
3104
3105 }
3106
3107 if (htab->tls_ldm_got.refcount > 0)
3108 {
3109 /* Allocate 2 got entries and 1 dynamic reloc for R_SH_TLS_LD_32
3110 relocs. */
3111 htab->tls_ldm_got.offset = htab->root.sgot->size;
3112 htab->root.sgot->size += 8;
3113 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
3114 }
3115 else
3116 htab->tls_ldm_got.offset = -1;
3117
3118 /* Only the reserved entries should be present. For FDPIC, they go at
3119 the end of .got.plt. */
3120 if (htab->fdpic_p)
3121 {
3122 BFD_ASSERT (htab->root.sgotplt && htab->root.sgotplt->size == 12);
3123 htab->root.sgotplt->size = 0;
3124 }
3125
3126 /* Allocate global sym .plt and .got entries, and space for global
3127 sym dynamic relocs. */
3128 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
3129
3130 /* Move the reserved entries and the _GLOBAL_OFFSET_TABLE_ symbol to the
3131 end of the FDPIC .got.plt. */
3132 if (htab->fdpic_p)
3133 {
3134 htab->root.hgot->root.u.def.value = htab->root.sgotplt->size;
3135 htab->root.sgotplt->size += 12;
3136 }
3137
3138 /* At the very end of the .rofixup section is a pointer to the GOT. */
3139 if (htab->fdpic_p && htab->srofixup != NULL)
3140 htab->srofixup->size += 4;
3141
3142 /* We now have determined the sizes of the various dynamic sections.
3143 Allocate memory for them. */
3144 relocs = false;
3145 for (s = dynobj->sections; s != NULL; s = s->next)
3146 {
3147 if ((s->flags & SEC_LINKER_CREATED) == 0)
3148 continue;
3149
3150 if (s == htab->root.splt
3151 || s == htab->root.sgot
3152 || s == htab->root.sgotplt
3153 || s == htab->sfuncdesc
3154 || s == htab->srofixup
3155 || s == htab->root.sdynbss)
3156 {
3157 /* Strip this section if we don't need it; see the
3158 comment below. */
3159 }
3160 else if (startswith (bfd_section_name (s), ".rela"))
3161 {
3162 if (s->size != 0 && s != htab->root.srelplt && s != htab->srelplt2)
3163 relocs = true;
3164
3165 /* We use the reloc_count field as a counter if we need
3166 to copy relocs into the output file. */
3167 s->reloc_count = 0;
3168 }
3169 else
3170 {
3171 /* It's not one of our sections, so don't allocate space. */
3172 continue;
3173 }
3174
3175 if (s->size == 0)
3176 {
3177 /* If we don't need this section, strip it from the
3178 output file. This is mostly to handle .rela.bss and
3179 .rela.plt. We must create both sections in
3180 create_dynamic_sections, because they must be created
3181 before the linker maps input sections to output
3182 sections. The linker does that before
3183 adjust_dynamic_symbol is called, and it is that
3184 function which decides whether anything needs to go
3185 into these sections. */
3186
3187 s->flags |= SEC_EXCLUDE;
3188 continue;
3189 }
3190
3191 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3192 continue;
3193
3194 /* Allocate memory for the section contents. We use bfd_zalloc
3195 here in case unused entries are not reclaimed before the
3196 section's contents are written out. This should not happen,
3197 but this way if it does, we get a R_SH_NONE reloc instead
3198 of garbage. */
3199 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3200 if (s->contents == NULL)
3201 return false;
3202 }
3203
3204 return _bfd_elf_maybe_vxworks_add_dynamic_tags (output_bfd, info,
3205 relocs);
3206 }
3207
3208 /* Add a dynamic relocation to the SRELOC section. */
3210
3211 inline static bfd_vma
3212 sh_elf_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
3213 int reloc_type, long dynindx, bfd_vma addend)
3214 {
3215 Elf_Internal_Rela outrel;
3216 bfd_vma reloc_offset;
3217
3218 outrel.r_offset = offset;
3219 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
3220 outrel.r_addend = addend;
3221
3222 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rela);
3223 BFD_ASSERT (reloc_offset < sreloc->size);
3224 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3225 sreloc->contents + reloc_offset);
3226 sreloc->reloc_count++;
3227
3228 return reloc_offset;
3229 }
3230
3231 /* Add an FDPIC read-only fixup. */
3232
3233 inline static void
3234 sh_elf_add_rofixup (bfd *output_bfd, asection *srofixup, bfd_vma offset)
3235 {
3236 bfd_vma fixup_offset;
3237
3238 fixup_offset = srofixup->reloc_count++ * 4;
3239 BFD_ASSERT (fixup_offset < srofixup->size);
3240 bfd_put_32 (output_bfd, offset, srofixup->contents + fixup_offset);
3241 }
3242
3243 /* Return the offset of the generated .got section from the
3244 _GLOBAL_OFFSET_TABLE_ symbol. */
3245
3246 static bfd_signed_vma
3247 sh_elf_got_offset (struct elf_sh_link_hash_table *htab)
3248 {
3249 return (htab->root.sgot->output_offset - htab->root.sgotplt->output_offset
3250 - htab->root.hgot->root.u.def.value);
3251 }
3252
3253 /* Find the segment number in which OSEC, and output section, is
3254 located. */
3255
3256 static unsigned
3257 sh_elf_osec_to_segment (bfd *output_bfd, asection *osec)
3258 {
3259 Elf_Internal_Phdr *p = NULL;
3260
3261 if (output_bfd->xvec->flavour == bfd_target_elf_flavour
3262 /* PR ld/17110: Do not look for output segments in an input bfd. */
3263 && output_bfd->direction != read_direction)
3264 p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
3265
3266 /* FIXME: Nothing ever says what this index is relative to. The kernel
3267 supplies data in terms of the number of load segments but this is
3268 a phdr index and the first phdr may not be a load segment. */
3269 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
3270 }
3271
3272 static bool
3273 sh_elf_osec_readonly_p (bfd *output_bfd, asection *osec)
3274 {
3275 unsigned seg = sh_elf_osec_to_segment (output_bfd, osec);
3276
3277 return (seg != (unsigned) -1
3278 && ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W));
3279 }
3280
3281 /* Generate the initial contents of a local function descriptor, along
3282 with any relocations or fixups required. */
3283 static bool
3284 sh_elf_initialize_funcdesc (bfd *output_bfd,
3285 struct bfd_link_info *info,
3286 struct elf_link_hash_entry *h,
3287 bfd_vma offset,
3288 asection *section,
3289 bfd_vma value)
3290 {
3291 struct elf_sh_link_hash_table *htab;
3292 int dynindx;
3293 bfd_vma addr, seg;
3294
3295 htab = sh_elf_hash_table (info);
3296
3297 /* FIXME: The ABI says that the offset to the function goes in the
3298 descriptor, along with the segment index. We're RELA, so it could
3299 go in the reloc instead... */
3300
3301 if (h != NULL && SYMBOL_CALLS_LOCAL (info, h))
3302 {
3303 section = h->root.u.def.section;
3304 value = h->root.u.def.value;
3305 }
3306
3307 if (h == NULL || SYMBOL_CALLS_LOCAL (info, h))
3308 {
3309 dynindx = elf_section_data (section->output_section)->dynindx;
3310 addr = value + section->output_offset;
3311 seg = sh_elf_osec_to_segment (output_bfd, section->output_section);
3312 }
3313 else
3314 {
3315 BFD_ASSERT (h->dynindx != -1);
3316 dynindx = h->dynindx;
3317 addr = seg = 0;
3318 }
3319
3320 if (!bfd_link_pic (info) && SYMBOL_CALLS_LOCAL (info, h))
3321 {
3322 if (h == NULL || h->root.type != bfd_link_hash_undefweak)
3323 {
3324 sh_elf_add_rofixup (output_bfd, htab->srofixup,
3325 offset
3326 + htab->sfuncdesc->output_section->vma
3327 + htab->sfuncdesc->output_offset);
3328 sh_elf_add_rofixup (output_bfd, htab->srofixup,
3329 offset + 4
3330 + htab->sfuncdesc->output_section->vma
3331 + htab->sfuncdesc->output_offset);
3332 }
3333
3334 /* There are no dynamic relocations so fill in the final
3335 address and gp value (barring fixups). */
3336 addr += section->output_section->vma;
3337 seg = htab->root.hgot->root.u.def.value
3338 + htab->root.hgot->root.u.def.section->output_section->vma
3339 + htab->root.hgot->root.u.def.section->output_offset;
3340 }
3341 else
3342 sh_elf_add_dyn_reloc (output_bfd, htab->srelfuncdesc,
3343 offset
3344 + htab->sfuncdesc->output_section->vma
3345 + htab->sfuncdesc->output_offset,
3346 R_SH_FUNCDESC_VALUE, dynindx, 0);
3347
3348 bfd_put_32 (output_bfd, addr, htab->sfuncdesc->contents + offset);
3349 bfd_put_32 (output_bfd, seg, htab->sfuncdesc->contents + offset + 4);
3350
3351 return true;
3352 }
3353
3354 /* Install a 20-bit movi20 field starting at ADDR, which occurs in OUTPUT_BFD.
3355 VALUE is the field's value. Return bfd_reloc_ok if successful or an error
3356 otherwise. */
3357
3358 static bfd_reloc_status_type
3359 install_movi20_field (bfd *output_bfd, unsigned long relocation,
3360 bfd *input_bfd, asection *input_section,
3361 bfd_byte *contents, bfd_vma offset)
3362 {
3363 unsigned long cur_val;
3364 bfd_byte *addr;
3365 bfd_reloc_status_type r;
3366
3367 if (offset > bfd_get_section_limit (input_bfd, input_section))
3368 return bfd_reloc_outofrange;
3369
3370 r = bfd_check_overflow (complain_overflow_signed, 20, 0,
3371 bfd_arch_bits_per_address (input_bfd), relocation);
3372 if (r != bfd_reloc_ok)
3373 return r;
3374
3375 addr = contents + offset;
3376 cur_val = bfd_get_16 (output_bfd, addr);
3377 bfd_put_16 (output_bfd, cur_val | ((relocation & 0xf0000) >> 12), addr);
3378 bfd_put_16 (output_bfd, relocation & 0xffff, addr + 2);
3379
3380 return bfd_reloc_ok;
3381 }
3382
3383 /* Relocate an SH ELF section. */
3384
3385 static int
3386 sh_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
3387 bfd *input_bfd, asection *input_section,
3388 bfd_byte *contents, Elf_Internal_Rela *relocs,
3389 Elf_Internal_Sym *local_syms,
3390 asection **local_sections)
3391 {
3392 struct elf_sh_link_hash_table *htab;
3393 Elf_Internal_Shdr *symtab_hdr;
3394 struct elf_link_hash_entry **sym_hashes;
3395 Elf_Internal_Rela *rel, *relend;
3396 bfd_vma *local_got_offsets;
3397 asection *sgot = NULL;
3398 asection *sgotplt = NULL;
3399 asection *splt = NULL;
3400 asection *sreloc = NULL;
3401 asection *srelgot = NULL;
3402 bool is_vxworks_tls;
3403 unsigned isec_segment, got_segment, plt_segment, check_segment[2];
3404 bool fdpic_p = false;
3405
3406 if (!is_sh_elf (input_bfd))
3407 {
3408 bfd_set_error (bfd_error_wrong_format);
3409 return false;
3410 }
3411
3412 htab = sh_elf_hash_table (info);
3413 if (htab != NULL)
3414 {
3415 sgot = htab->root.sgot;
3416 sgotplt = htab->root.sgotplt;
3417 srelgot = htab->root.srelgot;
3418 splt = htab->root.splt;
3419 fdpic_p = htab->fdpic_p;
3420 }
3421 symtab_hdr = &elf_symtab_hdr (input_bfd);
3422 sym_hashes = elf_sym_hashes (input_bfd);
3423 local_got_offsets = elf_local_got_offsets (input_bfd);
3424
3425 isec_segment = sh_elf_osec_to_segment (output_bfd,
3426 input_section->output_section);
3427 if (fdpic_p && sgot)
3428 got_segment = sh_elf_osec_to_segment (output_bfd,
3429 sgot->output_section);
3430 else
3431 got_segment = -1;
3432 if (fdpic_p && splt)
3433 plt_segment = sh_elf_osec_to_segment (output_bfd,
3434 splt->output_section);
3435 else
3436 plt_segment = -1;
3437
3438 /* We have to handle relocations in vxworks .tls_vars sections
3439 specially, because the dynamic loader is 'weird'. */
3440 is_vxworks_tls = (htab && htab->root.target_os == is_vxworks && bfd_link_pic (info)
3441 && !strcmp (input_section->output_section->name,
3442 ".tls_vars"));
3443
3444 rel = relocs;
3445 relend = relocs + input_section->reloc_count;
3446 for (; rel < relend; rel++)
3447 {
3448 int r_type;
3449 reloc_howto_type *howto;
3450 unsigned long r_symndx;
3451 Elf_Internal_Sym *sym;
3452 asection *sec;
3453 struct elf_link_hash_entry *h;
3454 bfd_vma relocation;
3455 bfd_vma addend = (bfd_vma) 0;
3456 bfd_reloc_status_type r;
3457 bfd_vma off;
3458 enum got_type got_type;
3459 const char *symname = NULL;
3460 bool resolved_to_zero;
3461
3462 r_symndx = ELF32_R_SYM (rel->r_info);
3463
3464 r_type = ELF32_R_TYPE (rel->r_info);
3465
3466 /* Many of the relocs are only used for relaxing, and are
3467 handled entirely by the relaxation code. */
3468 if (r_type >= (int) R_SH_GNU_VTINHERIT
3469 && r_type <= (int) R_SH_LABEL)
3470 continue;
3471 if (r_type == (int) R_SH_NONE)
3472 continue;
3473
3474 if (r_type < 0
3475 || r_type >= R_SH_max
3476 || (r_type >= (int) R_SH_FIRST_INVALID_RELOC
3477 && r_type <= (int) R_SH_LAST_INVALID_RELOC)
3478 || (r_type >= (int) R_SH_FIRST_INVALID_RELOC_2
3479 && r_type <= (int) R_SH_LAST_INVALID_RELOC_2)
3480 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_3
3481 && r_type <= (int) R_SH_LAST_INVALID_RELOC_3)
3482 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_4
3483 && r_type <= (int) R_SH_LAST_INVALID_RELOC_4)
3484 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_5
3485 && r_type <= (int) R_SH_LAST_INVALID_RELOC_5)
3486 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_6
3487 && r_type <= (int) R_SH_LAST_INVALID_RELOC_6))
3488 {
3489 bfd_set_error (bfd_error_bad_value);
3490 return false;
3491 }
3492
3493 howto = get_howto_table (output_bfd) + r_type;
3494
3495 /* For relocs that aren't partial_inplace, we get the addend from
3496 the relocation. */
3497 if (! howto->partial_inplace)
3498 addend = rel->r_addend;
3499
3500 resolved_to_zero = false;
3501 h = NULL;
3502 sym = NULL;
3503 sec = NULL;
3504 check_segment[0] = -1;
3505 check_segment[1] = -1;
3506 if (r_symndx < symtab_hdr->sh_info)
3507 {
3508 sym = local_syms + r_symndx;
3509 sec = local_sections[r_symndx];
3510
3511 symname = bfd_elf_string_from_elf_section
3512 (input_bfd, symtab_hdr->sh_link, sym->st_name);
3513 if (symname == NULL || *symname == '\0')
3514 symname = bfd_section_name (sec);
3515
3516 relocation = (sec->output_section->vma
3517 + sec->output_offset
3518 + sym->st_value);
3519
3520 if (sec != NULL && discarded_section (sec))
3521 /* Handled below. */
3522 ;
3523 else if (bfd_link_relocatable (info))
3524 {
3525 /* This is a relocatable link. We don't have to change
3526 anything, unless the reloc is against a section symbol,
3527 in which case we have to adjust according to where the
3528 section symbol winds up in the output section. */
3529 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3530 {
3531 if (! howto->partial_inplace)
3532 {
3533 /* For relocations with the addend in the
3534 relocation, we need just to update the addend.
3535 All real relocs are of type partial_inplace; this
3536 code is mostly for completeness. */
3537 rel->r_addend += sec->output_offset;
3538
3539 continue;
3540 }
3541
3542 /* Relocs of type partial_inplace need to pick up the
3543 contents in the contents and add the offset resulting
3544 from the changed location of the section symbol.
3545 Using _bfd_final_link_relocate (e.g. goto
3546 final_link_relocate) here would be wrong, because
3547 relocations marked pc_relative would get the current
3548 location subtracted, and we must only do that at the
3549 final link. */
3550 r = _bfd_relocate_contents (howto, input_bfd,
3551 sec->output_offset
3552 + sym->st_value,
3553 contents + rel->r_offset);
3554 goto relocation_done;
3555 }
3556
3557 continue;
3558 }
3559 else if (! howto->partial_inplace)
3560 {
3561 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3562 addend = rel->r_addend;
3563 }
3564 else if ((sec->flags & SEC_MERGE)
3565 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3566 {
3567 asection *msec;
3568
3569 if (howto->rightshift || howto->src_mask != 0xffffffff)
3570 {
3571 _bfd_error_handler
3572 /* xgettext:c-format */
3573 (_("%pB(%pA+%#" PRIx64 "): "
3574 "%s relocation against SEC_MERGE section"),
3575 input_bfd, input_section,
3576 (uint64_t) rel->r_offset, howto->name);
3577 return false;
3578 }
3579
3580 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3581 msec = sec;
3582 addend =
3583 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3584 - relocation;
3585 addend += msec->output_section->vma + msec->output_offset;
3586 bfd_put_32 (input_bfd, addend, contents + rel->r_offset);
3587 addend = 0;
3588 }
3589 }
3590 else
3591 {
3592 /* FIXME: Ought to make use of the RELOC_FOR_GLOBAL_SYMBOL macro. */
3593
3594 relocation = 0;
3595 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3596 symname = h->root.root.string;
3597 while (h->root.type == bfd_link_hash_indirect
3598 || h->root.type == bfd_link_hash_warning)
3599 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3600 if (h->root.type == bfd_link_hash_defined
3601 || h->root.type == bfd_link_hash_defweak)
3602 {
3603 bool dyn;
3604
3605 dyn = htab ? htab->root.dynamic_sections_created : false;
3606 sec = h->root.u.def.section;
3607 /* In these cases, we don't need the relocation value.
3608 We check specially because in some obscure cases
3609 sec->output_section will be NULL. */
3610 if (r_type == R_SH_GOTPC
3611 || r_type == R_SH_GOTPC_LOW16
3612 || r_type == R_SH_GOTPC_MEDLOW16
3613 || r_type == R_SH_GOTPC_MEDHI16
3614 || r_type == R_SH_GOTPC_HI16
3615 || ((r_type == R_SH_PLT32
3616 || r_type == R_SH_PLT_LOW16
3617 || r_type == R_SH_PLT_MEDLOW16
3618 || r_type == R_SH_PLT_MEDHI16
3619 || r_type == R_SH_PLT_HI16)
3620 && h->plt.offset != (bfd_vma) -1)
3621 || ((r_type == R_SH_GOT32
3622 || r_type == R_SH_GOT20
3623 || r_type == R_SH_GOTFUNCDESC
3624 || r_type == R_SH_GOTFUNCDESC20
3625 || r_type == R_SH_GOTOFFFUNCDESC
3626 || r_type == R_SH_GOTOFFFUNCDESC20
3627 || r_type == R_SH_FUNCDESC
3628 || r_type == R_SH_GOT_LOW16
3629 || r_type == R_SH_GOT_MEDLOW16
3630 || r_type == R_SH_GOT_MEDHI16
3631 || r_type == R_SH_GOT_HI16)
3632 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3633 bfd_link_pic (info),
3634 h)
3635 && (! bfd_link_pic (info)
3636 || (! info->symbolic && h->dynindx != -1)
3637 || !h->def_regular))
3638 /* The cases above are those in which relocation is
3639 overwritten in the switch block below. The cases
3640 below are those in which we must defer relocation
3641 to run-time, because we can't resolve absolute
3642 addresses when creating a shared library. */
3643 || (bfd_link_pic (info)
3644 && ((! info->symbolic && h->dynindx != -1)
3645 || !h->def_regular)
3646 && ((r_type == R_SH_DIR32
3647 && !h->forced_local)
3648 || (r_type == R_SH_REL32
3649 && !SYMBOL_CALLS_LOCAL (info, h)))
3650 && ((input_section->flags & SEC_ALLOC) != 0
3651 /* DWARF will emit R_SH_DIR32 relocations in its
3652 sections against symbols defined externally
3653 in shared libraries. We can't do anything
3654 with them here. */
3655 || ((input_section->flags & SEC_DEBUGGING) != 0
3656 && h->def_dynamic)))
3657 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3658 sections because such sections are not SEC_ALLOC and
3659 thus ld.so will not process them. */
3660 || (sec->output_section == NULL
3661 && ((input_section->flags & SEC_DEBUGGING) != 0
3662 && h->def_dynamic))
3663 || (sec->output_section == NULL
3664 && (sh_elf_hash_entry (h)->got_type == GOT_TLS_IE
3665 || sh_elf_hash_entry (h)->got_type == GOT_TLS_GD)))
3666 ;
3667 else if (sec->output_section != NULL)
3668 relocation = (h->root.u.def.value
3669 + sec->output_section->vma
3670 + sec->output_offset);
3671 else if (!bfd_link_relocatable (info)
3672 && (_bfd_elf_section_offset (output_bfd, info,
3673 input_section,
3674 rel->r_offset)
3675 != (bfd_vma) -1))
3676 {
3677 _bfd_error_handler
3678 /* xgettext:c-format */
3679 (_("%pB(%pA+%#" PRIx64 "): "
3680 "unresolvable %s relocation against symbol `%s'"),
3681 input_bfd,
3682 input_section,
3683 (uint64_t) rel->r_offset,
3684 howto->name,
3685 h->root.root.string);
3686 return false;
3687 }
3688 }
3689 else if (h->root.type == bfd_link_hash_undefweak)
3690 resolved_to_zero = UNDEFWEAK_NO_DYNAMIC_RELOC (info, h);
3691 else if (info->unresolved_syms_in_objects == RM_IGNORE
3692 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3693 ;
3694 else if (!bfd_link_relocatable (info))
3695 info->callbacks->undefined_symbol
3696 (info, h->root.root.string, input_bfd, input_section,
3697 rel->r_offset,
3698 (info->unresolved_syms_in_objects == RM_DIAGNOSE
3699 && !info->warn_unresolved_syms)
3700 || ELF_ST_VISIBILITY (h->other));
3701 }
3702
3703 if (sec != NULL && discarded_section (sec))
3704 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3705 rel, 1, relend, howto, 0, contents);
3706
3707 if (bfd_link_relocatable (info))
3708 continue;
3709
3710 /* Check for inter-segment relocations in FDPIC files. Most
3711 relocations connect the relocation site to the location of
3712 the target symbol, but there are some exceptions below. */
3713 check_segment[0] = isec_segment;
3714 if (sec != NULL)
3715 check_segment[1] = sh_elf_osec_to_segment (output_bfd,
3716 sec->output_section);
3717 else
3718 check_segment[1] = -1;
3719
3720 switch ((int) r_type)
3721 {
3722 final_link_relocate:
3723 /* COFF relocs don't use the addend. The addend is used for
3724 R_SH_DIR32 to be compatible with other compilers. */
3725 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3726 contents, rel->r_offset,
3727 relocation, addend);
3728 break;
3729
3730 case R_SH_IND12W:
3731 goto final_link_relocate;
3732
3733 case R_SH_DIR8WPN:
3734 case R_SH_DIR8WPZ:
3735 case R_SH_DIR8WPL:
3736 /* If the reloc is against the start of this section, then
3737 the assembler has already taken care of it and the reloc
3738 is here only to assist in relaxing. If the reloc is not
3739 against the start of this section, then it's against an
3740 external symbol and we must deal with it ourselves. */
3741 if (input_section->output_section->vma + input_section->output_offset
3742 != relocation)
3743 {
3744 int disp = (relocation
3745 - input_section->output_section->vma
3746 - input_section->output_offset
3747 - rel->r_offset);
3748 int mask = 0;
3749 switch (r_type)
3750 {
3751 case R_SH_DIR8WPN:
3752 case R_SH_DIR8WPZ: mask = 1; break;
3753 case R_SH_DIR8WPL: mask = 3; break;
3754 default: mask = 0; break;
3755 }
3756 if (disp & mask)
3757 {
3758 _bfd_error_handler
3759 /* xgettext:c-format */
3760 (_("%pB: %#" PRIx64 ": fatal: "
3761 "unaligned branch target for relax-support relocation"),
3762 input_section->owner,
3763 (uint64_t) rel->r_offset);
3764 bfd_set_error (bfd_error_bad_value);
3765 return false;
3766 }
3767 relocation -= 4;
3768 goto final_link_relocate;
3769 }
3770 r = bfd_reloc_ok;
3771 break;
3772
3773 default:
3774 bfd_set_error (bfd_error_bad_value);
3775 return false;
3776
3777 case R_SH_DIR16:
3778 case R_SH_DIR8:
3779 case R_SH_DIR8U:
3780 case R_SH_DIR8S:
3781 case R_SH_DIR4U:
3782 goto final_link_relocate;
3783
3784 case R_SH_DIR8UL:
3785 case R_SH_DIR4UL:
3786 if (relocation & 3)
3787 {
3788 _bfd_error_handler
3789 /* xgettext:c-format */
3790 (_("%pB: %#" PRIx64 ": fatal: "
3791 "unaligned %s relocation %#" PRIx64),
3792 input_section->owner, (uint64_t) rel->r_offset,
3793 howto->name, (uint64_t) relocation);
3794 bfd_set_error (bfd_error_bad_value);
3795 return false;
3796 }
3797 goto final_link_relocate;
3798
3799 case R_SH_DIR8UW:
3800 case R_SH_DIR8SW:
3801 case R_SH_DIR4UW:
3802 if (relocation & 1)
3803 {
3804 _bfd_error_handler
3805 /* xgettext:c-format */
3806 (_("%pB: %#" PRIx64 ": fatal: "
3807 "unaligned %s relocation %#" PRIx64 ""),
3808 input_section->owner,
3809 (uint64_t) rel->r_offset, howto->name,
3810 (uint64_t) relocation);
3811 bfd_set_error (bfd_error_bad_value);
3812 return false;
3813 }
3814 goto final_link_relocate;
3815
3816 case R_SH_PSHA:
3817 if ((signed int)relocation < -32
3818 || (signed int)relocation > 32)
3819 {
3820 _bfd_error_handler
3821 /* xgettext:c-format */
3822 (_("%pB: %#" PRIx64 ": fatal: R_SH_PSHA relocation %" PRId64
3823 " not in range -32..32"),
3824 input_section->owner,
3825 (uint64_t) rel->r_offset,
3826 (int64_t) relocation);
3827 bfd_set_error (bfd_error_bad_value);
3828 return false;
3829 }
3830 goto final_link_relocate;
3831
3832 case R_SH_PSHL:
3833 if ((signed int)relocation < -16
3834 || (signed int)relocation > 16)
3835 {
3836 _bfd_error_handler
3837 /* xgettext:c-format */
3838 (_("%pB: %#" PRIx64 ": fatal: R_SH_PSHL relocation %" PRId64
3839 " not in range -32..32"),
3840 input_section->owner,
3841 (uint64_t) rel->r_offset,
3842 (int64_t) relocation);
3843 bfd_set_error (bfd_error_bad_value);
3844 return false;
3845 }
3846 goto final_link_relocate;
3847
3848 case R_SH_DIR32:
3849 case R_SH_REL32:
3850 if (bfd_link_pic (info)
3851 && (h == NULL
3852 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3853 && !resolved_to_zero)
3854 || h->root.type != bfd_link_hash_undefweak)
3855 && r_symndx != STN_UNDEF
3856 && (input_section->flags & SEC_ALLOC) != 0
3857 && !is_vxworks_tls
3858 && (r_type == R_SH_DIR32
3859 || !SYMBOL_CALLS_LOCAL (info, h)))
3860 {
3861 Elf_Internal_Rela outrel;
3862 bfd_byte *loc;
3863 bool skip, relocate;
3864
3865 /* When generating a shared object, these relocations
3866 are copied into the output file to be resolved at run
3867 time. */
3868
3869 if (sreloc == NULL)
3870 {
3871 sreloc = _bfd_elf_get_dynamic_reloc_section
3872 (input_bfd, input_section, /*rela?*/ true);
3873 if (sreloc == NULL)
3874 return false;
3875 }
3876
3877 skip = false;
3878 relocate = false;
3879
3880 outrel.r_offset =
3881 _bfd_elf_section_offset (output_bfd, info, input_section,
3882 rel->r_offset);
3883 if (outrel.r_offset == (bfd_vma) -1)
3884 skip = true;
3885 else if (outrel.r_offset == (bfd_vma) -2)
3886 skip = true, relocate = true;
3887 outrel.r_offset += (input_section->output_section->vma
3888 + input_section->output_offset);
3889
3890 if (skip)
3891 memset (&outrel, 0, sizeof outrel);
3892 else if (r_type == R_SH_REL32)
3893 {
3894 BFD_ASSERT (h != NULL && h->dynindx != -1);
3895 outrel.r_info = ELF32_R_INFO (h->dynindx, R_SH_REL32);
3896 outrel.r_addend
3897 = (howto->partial_inplace
3898 ? bfd_get_32 (input_bfd, contents + rel->r_offset)
3899 : addend);
3900 }
3901 else if (fdpic_p
3902 && (h == NULL
3903 || ((info->symbolic || h->dynindx == -1)
3904 && h->def_regular)))
3905 {
3906 int dynindx;
3907
3908 BFD_ASSERT (sec != NULL);
3909 BFD_ASSERT (sec->output_section != NULL);
3910 dynindx = elf_section_data (sec->output_section)->dynindx;
3911 outrel.r_info = ELF32_R_INFO (dynindx, R_SH_DIR32);
3912 outrel.r_addend = relocation;
3913 outrel.r_addend
3914 += (howto->partial_inplace
3915 ? bfd_get_32 (input_bfd, contents + rel->r_offset)
3916 : addend);
3917 outrel.r_addend -= sec->output_section->vma;
3918 }
3919 else
3920 {
3921 /* h->dynindx may be -1 if this symbol was marked to
3922 become local. */
3923 if (h == NULL
3924 || ((info->symbolic || h->dynindx == -1)
3925 && h->def_regular))
3926 {
3927 relocate = howto->partial_inplace;
3928 outrel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
3929 }
3930 else
3931 {
3932 BFD_ASSERT (h->dynindx != -1);
3933 outrel.r_info = ELF32_R_INFO (h->dynindx, R_SH_DIR32);
3934 }
3935 outrel.r_addend = relocation;
3936 outrel.r_addend
3937 += (howto->partial_inplace
3938 ? bfd_get_32 (input_bfd, contents + rel->r_offset)
3939 : addend);
3940 }
3941
3942 loc = sreloc->contents;
3943 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3944 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3945
3946 check_segment[0] = check_segment[1] = -1;
3947
3948 /* If this reloc is against an external symbol, we do
3949 not want to fiddle with the addend. Otherwise, we
3950 need to include the symbol value so that it becomes
3951 an addend for the dynamic reloc. */
3952 if (! relocate)
3953 continue;
3954 }
3955 else if (fdpic_p && !bfd_link_pic (info)
3956 && r_type == R_SH_DIR32
3957 && (input_section->flags & SEC_ALLOC) != 0)
3958 {
3959 bfd_vma offset;
3960
3961 BFD_ASSERT (htab);
3962
3963 if (sh_elf_osec_readonly_p (output_bfd,
3964 input_section->output_section))
3965 {
3966 _bfd_error_handler
3967 /* xgettext:c-format */
3968 (_("%pB(%pA+%#" PRIx64 "): "
3969 "cannot emit fixup to `%s' in read-only section"),
3970 input_bfd,
3971 input_section,
3972 (uint64_t) rel->r_offset,
3973 symname);
3974 return false;
3975 }
3976
3977 offset = _bfd_elf_section_offset (output_bfd, info,
3978 input_section, rel->r_offset);
3979 if (offset != (bfd_vma)-1)
3980 sh_elf_add_rofixup (output_bfd, htab->srofixup,
3981 input_section->output_section->vma
3982 + input_section->output_offset
3983 + rel->r_offset);
3984
3985 check_segment[0] = check_segment[1] = -1;
3986 }
3987 /* We don't want warnings for non-NULL tests on undefined weak
3988 symbols. */
3989 else if (r_type == R_SH_REL32
3990 && h
3991 && h->root.type == bfd_link_hash_undefweak)
3992 check_segment[0] = check_segment[1] = -1;
3993 goto final_link_relocate;
3994
3995 case R_SH_GOTPLT32:
3996 /* Relocation is to the entry for this symbol in the
3997 procedure linkage table. */
3998
3999 if (h == NULL
4000 || h->forced_local
4001 || ! bfd_link_pic (info)
4002 || info->symbolic
4003 || h->dynindx == -1
4004 || h->plt.offset == (bfd_vma) -1
4005 || h->got.offset != (bfd_vma) -1)
4006 goto force_got;
4007
4008 /* Relocation is to the entry for this symbol in the global
4009 offset table extension for the procedure linkage table. */
4010
4011 BFD_ASSERT (htab);
4012 BFD_ASSERT (sgotplt != NULL);
4013 relocation = (sgotplt->output_offset
4014 + (get_plt_index (htab->plt_info, h->plt.offset)
4015 + 3) * 4);
4016
4017 #ifdef GOT_BIAS
4018 relocation -= GOT_BIAS;
4019 #endif
4020
4021 goto final_link_relocate;
4022
4023 force_got:
4024 case R_SH_GOT32:
4025 case R_SH_GOT20:
4026 /* Relocation is to the entry for this symbol in the global
4027 offset table. */
4028
4029 BFD_ASSERT (htab);
4030 BFD_ASSERT (sgot != NULL);
4031 check_segment[0] = check_segment[1] = -1;
4032
4033 if (h != NULL)
4034 {
4035 bool dyn;
4036
4037 off = h->got.offset;
4038 BFD_ASSERT (off != (bfd_vma) -1);
4039
4040 dyn = htab->root.dynamic_sections_created;
4041 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4042 bfd_link_pic (info),
4043 h)
4044 || (bfd_link_pic (info)
4045 && SYMBOL_REFERENCES_LOCAL (info, h))
4046 || ((ELF_ST_VISIBILITY (h->other)
4047 || resolved_to_zero)
4048 && h->root.type == bfd_link_hash_undefweak))
4049 {
4050 /* This is actually a static link, or it is a
4051 -Bsymbolic link and the symbol is defined
4052 locally, or the symbol was forced to be local
4053 because of a version file. We must initialize
4054 this entry in the global offset table. Since the
4055 offset must always be a multiple of 4, we use the
4056 least significant bit to record whether we have
4057 initialized it already.
4058
4059 When doing a dynamic link, we create a .rela.got
4060 relocation entry to initialize the value. This
4061 is done in the finish_dynamic_symbol routine. */
4062 if ((off & 1) != 0)
4063 off &= ~1;
4064 else
4065 {
4066 bfd_put_32 (output_bfd, relocation,
4067 sgot->contents + off);
4068 h->got.offset |= 1;
4069
4070 /* If we initialize the GOT entry here with a valid
4071 symbol address, also add a fixup. */
4072 if (fdpic_p && !bfd_link_pic (info)
4073 && sh_elf_hash_entry (h)->got_type == GOT_NORMAL
4074 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4075 || h->root.type != bfd_link_hash_undefweak))
4076 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4077 sgot->output_section->vma
4078 + sgot->output_offset
4079 + off);
4080 }
4081 }
4082
4083 relocation = sh_elf_got_offset (htab) + off;
4084 }
4085 else
4086 {
4087 BFD_ASSERT (local_got_offsets != NULL
4088 && local_got_offsets[r_symndx] != (bfd_vma) -1);
4089
4090 off = local_got_offsets[r_symndx];
4091
4092 /* The offset must always be a multiple of 4. We use
4093 the least significant bit to record whether we have
4094 already generated the necessary reloc. */
4095 if ((off & 1) != 0)
4096 off &= ~1;
4097 else
4098 {
4099 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
4100
4101 if (bfd_link_pic (info))
4102 {
4103 Elf_Internal_Rela outrel;
4104 bfd_byte *loc;
4105
4106 outrel.r_offset = (sgot->output_section->vma
4107 + sgot->output_offset
4108 + off);
4109 if (fdpic_p)
4110 {
4111 int dynindx
4112 = elf_section_data (sec->output_section)->dynindx;
4113 outrel.r_info = ELF32_R_INFO (dynindx, R_SH_DIR32);
4114 outrel.r_addend = relocation;
4115 outrel.r_addend -= sec->output_section->vma;
4116 }
4117 else
4118 {
4119 outrel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
4120 outrel.r_addend = relocation;
4121 }
4122 loc = srelgot->contents;
4123 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4124 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4125 }
4126 else if (fdpic_p
4127 && (sh_elf_local_got_type (input_bfd) [r_symndx]
4128 == GOT_NORMAL))
4129 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4130 sgot->output_section->vma
4131 + sgot->output_offset
4132 + off);
4133
4134 local_got_offsets[r_symndx] |= 1;
4135 }
4136
4137 relocation = sh_elf_got_offset (htab) + off;
4138 }
4139
4140 #ifdef GOT_BIAS
4141 relocation -= GOT_BIAS;
4142 #endif
4143
4144 if (r_type == R_SH_GOT20)
4145 {
4146 r = install_movi20_field (output_bfd, relocation + addend,
4147 input_bfd, input_section, contents,
4148 rel->r_offset);
4149 break;
4150 }
4151 else
4152 goto final_link_relocate;
4153
4154 case R_SH_GOTOFF:
4155 case R_SH_GOTOFF20:
4156 /* GOTOFF relocations are relative to _GLOBAL_OFFSET_TABLE_, which
4157 we place at the start of the .got.plt section. This is the same
4158 as the start of the output .got section, unless there are function
4159 descriptors in front of it. */
4160 BFD_ASSERT (htab);
4161 BFD_ASSERT (sgotplt != NULL);
4162 check_segment[0] = got_segment;
4163 relocation -= sgotplt->output_section->vma + sgotplt->output_offset
4164 + htab->root.hgot->root.u.def.value;
4165
4166 #ifdef GOT_BIAS
4167 relocation -= GOT_BIAS;
4168 #endif
4169
4170 addend = rel->r_addend;
4171
4172 if (r_type == R_SH_GOTOFF20)
4173 {
4174 r = install_movi20_field (output_bfd, relocation + addend,
4175 input_bfd, input_section, contents,
4176 rel->r_offset);
4177 break;
4178 }
4179 else
4180 goto final_link_relocate;
4181
4182 case R_SH_GOTPC:
4183 /* Use global offset table as symbol value. */
4184
4185 BFD_ASSERT (sgotplt != NULL);
4186 relocation = sgotplt->output_section->vma + sgotplt->output_offset;
4187
4188 #ifdef GOT_BIAS
4189 relocation += GOT_BIAS;
4190 #endif
4191
4192 addend = rel->r_addend;
4193
4194 goto final_link_relocate;
4195
4196 case R_SH_PLT32:
4197 /* Relocation is to the entry for this symbol in the
4198 procedure linkage table. */
4199
4200 /* Resolve a PLT reloc against a local symbol directly,
4201 without using the procedure linkage table. */
4202 if (h == NULL)
4203 goto final_link_relocate;
4204
4205 /* We don't want to warn on calls to undefined weak symbols,
4206 as calls to them must be protected by non-NULL tests
4207 anyway, and unprotected calls would invoke undefined
4208 behavior. */
4209 if (h->root.type == bfd_link_hash_undefweak)
4210 check_segment[0] = check_segment[1] = -1;
4211
4212 if (h->forced_local)
4213 goto final_link_relocate;
4214
4215 if (h->plt.offset == (bfd_vma) -1)
4216 {
4217 /* We didn't make a PLT entry for this symbol. This
4218 happens when statically linking PIC code, or when
4219 using -Bsymbolic. */
4220 goto final_link_relocate;
4221 }
4222
4223 BFD_ASSERT (splt != NULL);
4224 check_segment[1] = plt_segment;
4225 relocation = (splt->output_section->vma
4226 + splt->output_offset
4227 + h->plt.offset);
4228
4229 addend = rel->r_addend;
4230
4231 goto final_link_relocate;
4232
4233 /* Relocation is to the canonical function descriptor for this
4234 symbol, possibly via the GOT. Initialize the GOT
4235 entry and function descriptor if necessary. */
4236 case R_SH_GOTFUNCDESC:
4237 case R_SH_GOTFUNCDESC20:
4238 case R_SH_FUNCDESC:
4239 {
4240 int dynindx = -1;
4241 asection *reloc_section;
4242 bfd_vma reloc_offset;
4243 int reloc_type = R_SH_FUNCDESC;
4244
4245 BFD_ASSERT (htab);
4246
4247 check_segment[0] = check_segment[1] = -1;
4248
4249 /* FIXME: See what FRV does for global symbols in the
4250 executable, with --export-dynamic. Do they need ld.so
4251 to allocate official descriptors? See what this code
4252 does. */
4253
4254 relocation = 0;
4255 addend = 0;
4256
4257 if (r_type == R_SH_FUNCDESC)
4258 {
4259 reloc_section = input_section;
4260 reloc_offset = rel->r_offset;
4261 }
4262 else
4263 {
4264 reloc_section = sgot;
4265
4266 if (h != NULL)
4267 reloc_offset = h->got.offset;
4268 else
4269 {
4270 BFD_ASSERT (local_got_offsets != NULL);
4271 reloc_offset = local_got_offsets[r_symndx];
4272 }
4273 BFD_ASSERT (reloc_offset != MINUS_ONE);
4274
4275 if (reloc_offset & 1)
4276 {
4277 reloc_offset &= ~1;
4278 goto funcdesc_done_got;
4279 }
4280 }
4281
4282 if (h && h->root.type == bfd_link_hash_undefweak
4283 && (SYMBOL_CALLS_LOCAL (info, h)
4284 || !htab->root.dynamic_sections_created))
4285 /* Undefined weak symbol which will not be dynamically
4286 resolved later; leave it at zero. */
4287 goto funcdesc_leave_zero;
4288 else if (SYMBOL_CALLS_LOCAL (info, h)
4289 && ! SYMBOL_FUNCDESC_LOCAL (info, h))
4290 {
4291 /* If the symbol needs a non-local function descriptor
4292 but binds locally (i.e., its visibility is
4293 protected), emit a dynamic relocation decayed to
4294 section+offset. This is an optimization; the dynamic
4295 linker would resolve our function descriptor request
4296 to our copy of the function anyway. */
4297 dynindx = elf_section_data (h->root.u.def.section
4298 ->output_section)->dynindx;
4299 relocation += h->root.u.def.section->output_offset
4300 + h->root.u.def.value;
4301 }
4302 else if (! SYMBOL_FUNCDESC_LOCAL (info, h))
4303 {
4304 /* If the symbol is dynamic and there will be dynamic
4305 symbol resolution because we are or are linked with a
4306 shared library, emit a FUNCDESC relocation such that
4307 the dynamic linker will allocate the function
4308 descriptor. */
4309 BFD_ASSERT (h->dynindx != -1);
4310 dynindx = h->dynindx;
4311 }
4312 else
4313 {
4314 bfd_vma offset;
4315
4316 /* Otherwise, we know we have a private function
4317 descriptor, so reference it directly. */
4318 reloc_type = R_SH_DIR32;
4319 dynindx = elf_section_data (htab->sfuncdesc
4320 ->output_section)->dynindx;
4321
4322 if (h)
4323 {
4324 offset = sh_elf_hash_entry (h)->funcdesc.offset;
4325 BFD_ASSERT (offset != MINUS_ONE);
4326 if ((offset & 1) == 0)
4327 {
4328 if (!sh_elf_initialize_funcdesc (output_bfd, info, h,
4329 offset, NULL, 0))
4330 return false;
4331 sh_elf_hash_entry (h)->funcdesc.offset |= 1;
4332 }
4333 }
4334 else
4335 {
4336 union gotref *local_funcdesc;
4337
4338 local_funcdesc = sh_elf_local_funcdesc (input_bfd);
4339 offset = local_funcdesc[r_symndx].offset;
4340 BFD_ASSERT (offset != MINUS_ONE);
4341 if ((offset & 1) == 0)
4342 {
4343 if (!sh_elf_initialize_funcdesc (output_bfd, info, NULL,
4344 offset, sec,
4345 sym->st_value))
4346 return false;
4347 local_funcdesc[r_symndx].offset |= 1;
4348 }
4349 }
4350
4351 relocation = htab->sfuncdesc->output_offset + (offset & ~1);
4352 }
4353
4354 if (!bfd_link_pic (info) && SYMBOL_FUNCDESC_LOCAL (info, h))
4355 {
4356 bfd_vma offset;
4357
4358 if (sh_elf_osec_readonly_p (output_bfd,
4359 reloc_section->output_section))
4360 {
4361 _bfd_error_handler
4362 /* xgettext:c-format */
4363 (_("%pB(%pA+%#" PRIx64 "): "
4364 "cannot emit fixup to `%s' in read-only section"),
4365 input_bfd,
4366 input_section,
4367 (uint64_t) rel->r_offset,
4368 symname);
4369 return false;
4370 }
4371
4372 offset = _bfd_elf_section_offset (output_bfd, info,
4373 reloc_section, reloc_offset);
4374
4375 if (offset != (bfd_vma)-1)
4376 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4377 offset
4378 + reloc_section->output_section->vma
4379 + reloc_section->output_offset);
4380 }
4381 else if ((reloc_section->output_section->flags
4382 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
4383 {
4384 bfd_vma offset;
4385
4386 if (sh_elf_osec_readonly_p (output_bfd,
4387 reloc_section->output_section))
4388 {
4389 info->callbacks->warning
4390 (info,
4391 _("cannot emit dynamic relocations in read-only section"),
4392 symname, input_bfd, reloc_section, reloc_offset);
4393 return false;
4394 }
4395
4396 offset = _bfd_elf_section_offset (output_bfd, info,
4397 reloc_section, reloc_offset);
4398
4399 if (offset != (bfd_vma)-1)
4400 sh_elf_add_dyn_reloc (output_bfd, srelgot,
4401 offset
4402 + reloc_section->output_section->vma
4403 + reloc_section->output_offset,
4404 reloc_type, dynindx, relocation);
4405
4406 if (r_type == R_SH_FUNCDESC)
4407 {
4408 r = bfd_reloc_ok;
4409 break;
4410 }
4411 else
4412 {
4413 relocation = 0;
4414 goto funcdesc_leave_zero;
4415 }
4416 }
4417
4418 if (SYMBOL_FUNCDESC_LOCAL (info, h))
4419 relocation += htab->sfuncdesc->output_section->vma;
4420 funcdesc_leave_zero:
4421 if (r_type != R_SH_FUNCDESC)
4422 {
4423 bfd_put_32 (output_bfd, relocation,
4424 reloc_section->contents + reloc_offset);
4425 if (h != NULL)
4426 h->got.offset |= 1;
4427 else
4428 local_got_offsets[r_symndx] |= 1;
4429
4430 funcdesc_done_got:
4431
4432 relocation = sh_elf_got_offset (htab) + reloc_offset;
4433 #ifdef GOT_BIAS
4434 relocation -= GOT_BIAS;
4435 #endif
4436 }
4437 if (r_type == R_SH_GOTFUNCDESC20)
4438 {
4439 r = install_movi20_field (output_bfd, relocation + addend,
4440 input_bfd, input_section, contents,
4441 rel->r_offset);
4442 break;
4443 }
4444 else
4445 goto final_link_relocate;
4446 }
4447 break;
4448
4449 case R_SH_GOTOFFFUNCDESC:
4450 case R_SH_GOTOFFFUNCDESC20:
4451 /* FIXME: See R_SH_FUNCDESC comment about global symbols in the
4452 executable and --export-dynamic. If such symbols get
4453 ld.so-allocated descriptors we can not use R_SH_GOTOFFFUNCDESC
4454 for them. */
4455 BFD_ASSERT (htab);
4456
4457 check_segment[0] = check_segment[1] = -1;
4458 relocation = 0;
4459 addend = rel->r_addend;
4460
4461 if (h && (h->root.type == bfd_link_hash_undefweak
4462 || !SYMBOL_FUNCDESC_LOCAL (info, h)))
4463 {
4464 _bfd_error_handler
4465 /* xgettext:c-format */
4466 (_("%pB(%pA+%#" PRIx64 "): "
4467 "%s relocation against external symbol \"%s\""),
4468 input_bfd, input_section, (uint64_t) rel->r_offset,
4469 howto->name, h->root.root.string);
4470 return false;
4471 }
4472 else
4473 {
4474 bfd_vma offset;
4475
4476 /* Otherwise, we know we have a private function
4477 descriptor, so reference it directly. */
4478 if (h)
4479 {
4480 offset = sh_elf_hash_entry (h)->funcdesc.offset;
4481 BFD_ASSERT (offset != MINUS_ONE);
4482 if ((offset & 1) == 0)
4483 {
4484 if (!sh_elf_initialize_funcdesc (output_bfd, info, h,
4485 offset, NULL, 0))
4486 return false;
4487 sh_elf_hash_entry (h)->funcdesc.offset |= 1;
4488 }
4489 }
4490 else
4491 {
4492 union gotref *local_funcdesc;
4493
4494 local_funcdesc = sh_elf_local_funcdesc (input_bfd);
4495 offset = local_funcdesc[r_symndx].offset;
4496 BFD_ASSERT (offset != MINUS_ONE);
4497 if ((offset & 1) == 0)
4498 {
4499 if (!sh_elf_initialize_funcdesc (output_bfd, info, NULL,
4500 offset, sec,
4501 sym->st_value))
4502 return false;
4503 local_funcdesc[r_symndx].offset |= 1;
4504 }
4505 }
4506
4507 relocation = htab->sfuncdesc->output_offset + (offset & ~1);
4508 }
4509
4510 relocation -= (htab->root.hgot->root.u.def.value
4511 + sgotplt->output_offset);
4512 #ifdef GOT_BIAS
4513 relocation -= GOT_BIAS;
4514 #endif
4515
4516 if (r_type == R_SH_GOTOFFFUNCDESC20)
4517 {
4518 r = install_movi20_field (output_bfd, relocation + addend,
4519 input_bfd, input_section, contents,
4520 rel->r_offset);
4521 break;
4522 }
4523 else
4524 goto final_link_relocate;
4525
4526 case R_SH_LOOP_START:
4527 {
4528 static bfd_vma start, end;
4529
4530 start = (relocation + rel->r_addend
4531 - (sec->output_section->vma + sec->output_offset));
4532 r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents,
4533 rel->r_offset, sec, start, end);
4534 break;
4535
4536 case R_SH_LOOP_END:
4537 end = (relocation + rel->r_addend
4538 - (sec->output_section->vma + sec->output_offset));
4539 r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents,
4540 rel->r_offset, sec, start, end);
4541 break;
4542 }
4543
4544 case R_SH_TLS_GD_32:
4545 case R_SH_TLS_IE_32:
4546 BFD_ASSERT (htab);
4547 check_segment[0] = check_segment[1] = -1;
4548 r_type = sh_elf_optimized_tls_reloc (info, r_type, h == NULL);
4549 got_type = GOT_UNKNOWN;
4550 if (h == NULL && local_got_offsets)
4551 got_type = sh_elf_local_got_type (input_bfd) [r_symndx];
4552 else if (h != NULL)
4553 {
4554 got_type = sh_elf_hash_entry (h)->got_type;
4555 if (! bfd_link_pic (info)
4556 && (h->dynindx == -1
4557 || h->def_regular))
4558 r_type = R_SH_TLS_LE_32;
4559 }
4560
4561 if (r_type == R_SH_TLS_GD_32 && got_type == GOT_TLS_IE)
4562 r_type = R_SH_TLS_IE_32;
4563
4564 if (r_type == R_SH_TLS_LE_32)
4565 {
4566 bfd_vma offset;
4567 unsigned short insn;
4568
4569 if (ELF32_R_TYPE (rel->r_info) == R_SH_TLS_GD_32)
4570 {
4571 /* GD->LE transition:
4572 mov.l 1f,r4; mova 2f,r0; mov.l 2f,r1; add r0,r1;
4573 jsr @r1; add r12,r4; bra 3f; nop; .align 2;
4574 1: .long x$TLSGD; 2: .long __tls_get_addr@PLT; 3:
4575 We change it into:
4576 mov.l 1f,r4; stc gbr,r0; add r4,r0; nop;
4577 nop; nop; ...
4578 1: .long x@TPOFF; 2: .long __tls_get_addr@PLT; 3:. */
4579
4580 offset = rel->r_offset;
4581 if (offset < 16)
4582 {
4583 _bfd_error_handler
4584 /* xgettext:c-format */
4585 (_("%pB(%pA): offset in relocation for GD->LE translation is too small: %#" PRIx64),
4586 input_bfd, input_section, (uint64_t) offset);
4587 return false;
4588 }
4589
4590 /* Size of GD instructions is 16 or 18. */
4591 offset -= 16;
4592 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4593 if ((insn & 0xff00) == 0xc700)
4594 {
4595 BFD_ASSERT (offset >= 2);
4596 offset -= 2;
4597 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4598 }
4599
4600 if ((insn & 0xff00) != 0xd400)
4601 _bfd_error_handler
4602 /* xgettext:c-format */ /* The backslash is to prevent bogus trigraph detection. */
4603 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0xd4?\?)"),
4604 input_bfd, input_section, (uint64_t) offset, (int) insn);
4605
4606 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4607
4608 if ((insn & 0xff00) != 0xc700)
4609 _bfd_error_handler
4610 /* xgettext:c-format */
4611 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0xc7?\?)"),
4612 input_bfd, input_section, (uint64_t) offset, (int) insn);
4613
4614 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4615 if ((insn & 0xff00) != 0xd100)
4616 _bfd_error_handler
4617 /* xgettext:c-format */
4618 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0xd1?\?)"),
4619 input_bfd, input_section, (uint64_t) offset, (int) insn);
4620
4621 insn = bfd_get_16 (input_bfd, contents + offset + 6);
4622 if (insn != 0x310c)
4623 _bfd_error_handler
4624 /* xgettext:c-format */
4625 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0x310c)"),
4626 input_bfd, input_section, (uint64_t) offset, (int) insn);
4627
4628 insn = bfd_get_16 (input_bfd, contents + offset + 8);
4629 if (insn != 0x410b)
4630 _bfd_error_handler
4631 /* xgettext:c-format */
4632 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0x410b)"),
4633 input_bfd, input_section, (uint64_t) offset, (int) insn);
4634
4635 insn = bfd_get_16 (input_bfd, contents + offset + 10);
4636 if (insn != 0x34cc)
4637 _bfd_error_handler
4638 /* xgettext:c-format */
4639 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0x34cc)"),
4640 input_bfd, input_section, (uint64_t) offset, (int) insn);
4641
4642 bfd_put_16 (output_bfd, 0x0012, contents + offset + 2);
4643 bfd_put_16 (output_bfd, 0x304c, contents + offset + 4);
4644 bfd_put_16 (output_bfd, 0x0009, contents + offset + 6);
4645 bfd_put_16 (output_bfd, 0x0009, contents + offset + 8);
4646 bfd_put_16 (output_bfd, 0x0009, contents + offset + 10);
4647 }
4648 else
4649 {
4650 int target;
4651
4652 /* IE->LE transition:
4653 mov.l 1f,r0;
4654 stc gbr,rN;
4655 mov.l @(r0,r12),rM;
4656 bra 2f;
4657 add ...;
4658 .align 2;
4659 1: x@GOTTPOFF;
4660 2:
4661 We change it into:
4662 mov.l .Ln,rM;
4663 stc gbr,rN;
4664 nop;
4665 ...;
4666 1: x@TPOFF;
4667 2:. */
4668
4669 offset = rel->r_offset;
4670 if (offset < 16)
4671 {
4672 _bfd_error_handler
4673 /* xgettext:c-format */
4674 (_("%pB(%pA): offset in relocation for IE->LE translation is too small: %#" PRIx64),
4675 input_bfd, input_section, (uint64_t) offset);
4676 return false;
4677 }
4678
4679 /* Size of IE instructions is 10 or 12. */
4680 offset -= 10;
4681 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4682 if ((insn & 0xf0ff) == 0x0012)
4683 {
4684 BFD_ASSERT (offset >= 2);
4685 offset -= 2;
4686 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4687 }
4688
4689 if ((insn & 0xff00) != 0xd000)
4690 _bfd_error_handler
4691 /* xgettext:c-format */
4692 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0xd0??: mov.l)"),
4693 input_bfd, input_section, (uint64_t) offset, (int) insn);
4694
4695 target = insn & 0x00ff;
4696
4697 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4698 if ((insn & 0xf0ff) != 0x0012)
4699 _bfd_error_handler
4700 /* xgettext:c-format */
4701 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0x0?12: stc)"),
4702 input_bfd, input_section, (uint64_t) (offset + 2), (int) insn);
4703
4704 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4705 if ((insn & 0xf0ff) != 0x00ce)
4706 _bfd_error_handler
4707 /* xgettext:c-format */
4708 (_("%pB(%pA+%#" PRIx64 "): unexpected instruction %#04X (expected 0x0?ce: mov.l)"),
4709 input_bfd, input_section, (uint64_t) (offset + 4), (int) insn);
4710
4711 insn = 0xd000 | (insn & 0x0f00) | target;
4712 bfd_put_16 (output_bfd, insn, contents + offset + 0);
4713 bfd_put_16 (output_bfd, 0x0009, contents + offset + 4);
4714 }
4715
4716 bfd_put_32 (output_bfd, tpoff (info, relocation),
4717 contents + rel->r_offset);
4718 continue;
4719 }
4720
4721 if (sgot == NULL || sgotplt == NULL)
4722 abort ();
4723
4724 if (h != NULL)
4725 off = h->got.offset;
4726 else
4727 {
4728 if (local_got_offsets == NULL)
4729 abort ();
4730
4731 off = local_got_offsets[r_symndx];
4732 }
4733
4734 /* Relocate R_SH_TLS_IE_32 directly when statically linking. */
4735 if (r_type == R_SH_TLS_IE_32
4736 && ! htab->root.dynamic_sections_created)
4737 {
4738 off &= ~1;
4739 bfd_put_32 (output_bfd, tpoff (info, relocation),
4740 sgot->contents + off);
4741 bfd_put_32 (output_bfd, sh_elf_got_offset (htab) + off,
4742 contents + rel->r_offset);
4743 continue;
4744 }
4745
4746 if ((off & 1) != 0)
4747 off &= ~1;
4748 else
4749 {
4750 Elf_Internal_Rela outrel;
4751 bfd_byte *loc;
4752 int dr_type, indx;
4753
4754 outrel.r_offset = (sgot->output_section->vma
4755 + sgot->output_offset + off);
4756
4757 if (h == NULL || h->dynindx == -1)
4758 indx = 0;
4759 else
4760 indx = h->dynindx;
4761
4762 dr_type = (r_type == R_SH_TLS_GD_32 ? R_SH_TLS_DTPMOD32 :
4763 R_SH_TLS_TPOFF32);
4764 if (dr_type == R_SH_TLS_TPOFF32 && indx == 0)
4765 outrel.r_addend = relocation - dtpoff_base (info);
4766 else
4767 outrel.r_addend = 0;
4768 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4769 loc = srelgot->contents;
4770 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4771 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4772
4773 if (r_type == R_SH_TLS_GD_32)
4774 {
4775 if (indx == 0)
4776 {
4777 bfd_put_32 (output_bfd,
4778 relocation - dtpoff_base (info),
4779 sgot->contents + off + 4);
4780 }
4781 else
4782 {
4783 outrel.r_info = ELF32_R_INFO (indx,
4784 R_SH_TLS_DTPOFF32);
4785 outrel.r_offset += 4;
4786 outrel.r_addend = 0;
4787 srelgot->reloc_count++;
4788 loc += sizeof (Elf32_External_Rela);
4789 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4790 }
4791 }
4792
4793 if (h != NULL)
4794 h->got.offset |= 1;
4795 else
4796 local_got_offsets[r_symndx] |= 1;
4797 }
4798
4799 if (off >= (bfd_vma) -2)
4800 abort ();
4801
4802 if (r_type == (int) ELF32_R_TYPE (rel->r_info))
4803 relocation = sh_elf_got_offset (htab) + off;
4804 else
4805 {
4806 bfd_vma offset;
4807 unsigned short insn;
4808
4809 /* GD->IE transition:
4810 mov.l 1f,r4; mova 2f,r0; mov.l 2f,r1; add r0,r1;
4811 jsr @r1; add r12,r4; bra 3f; nop; .align 2;
4812 1: .long x$TLSGD; 2: .long __tls_get_addr@PLT; 3:
4813 We change it into:
4814 mov.l 1f,r0; stc gbr,r4; mov.l @(r0,r12),r0; add r4,r0;
4815 nop; nop; bra 3f; nop; .align 2;
4816 1: .long x@TPOFF; 2:...; 3:. */
4817
4818 offset = rel->r_offset;
4819 if (offset < 16)
4820 {
4821 _bfd_error_handler
4822 /* xgettext:c-format */
4823 (_("%pB(%pA): offset in relocation for GD->IE translation is too small: %#" PRIx64),
4824 input_bfd, input_section, (uint64_t) offset);
4825 return false;
4826 }
4827
4828 /* Size of GD instructions is 16 or 18. */
4829 offset -= 16;
4830 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4831 if ((insn & 0xff00) == 0xc700)
4832 {
4833 BFD_ASSERT (offset >= 2);
4834 offset -= 2;
4835 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4836 }
4837
4838 BFD_ASSERT ((insn & 0xff00) == 0xd400);
4839
4840 /* Replace mov.l 1f,R4 with mov.l 1f,r0. */
4841 bfd_put_16 (output_bfd, insn & 0xf0ff, contents + offset);
4842
4843 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4844 BFD_ASSERT ((insn & 0xff00) == 0xc700);
4845 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4846 BFD_ASSERT ((insn & 0xff00) == 0xd100);
4847 insn = bfd_get_16 (input_bfd, contents + offset + 6);
4848 BFD_ASSERT (insn == 0x310c);
4849 insn = bfd_get_16 (input_bfd, contents + offset + 8);
4850 BFD_ASSERT (insn == 0x410b);
4851 insn = bfd_get_16 (input_bfd, contents + offset + 10);
4852 BFD_ASSERT (insn == 0x34cc);
4853
4854 bfd_put_16 (output_bfd, 0x0412, contents + offset + 2);
4855 bfd_put_16 (output_bfd, 0x00ce, contents + offset + 4);
4856 bfd_put_16 (output_bfd, 0x304c, contents + offset + 6);
4857 bfd_put_16 (output_bfd, 0x0009, contents + offset + 8);
4858 bfd_put_16 (output_bfd, 0x0009, contents + offset + 10);
4859
4860 bfd_put_32 (output_bfd, sh_elf_got_offset (htab) + off,
4861 contents + rel->r_offset);
4862
4863 continue;
4864 }
4865
4866 addend = rel->r_addend;
4867
4868 goto final_link_relocate;
4869
4870 case R_SH_TLS_LD_32:
4871 BFD_ASSERT (htab);
4872 check_segment[0] = check_segment[1] = -1;
4873 if (! bfd_link_pic (info))
4874 {
4875 bfd_vma offset;
4876 unsigned short insn;
4877
4878 /* LD->LE transition:
4879 mov.l 1f,r4; mova 2f,r0; mov.l 2f,r1; add r0,r1;
4880 jsr @r1; add r12,r4; bra 3f; nop; .align 2;
4881 1: .long x$TLSLD; 2: .long __tls_get_addr@PLT; 3:
4882 We change it into:
4883 stc gbr,r0; nop; nop; nop;
4884 nop; nop; bra 3f; ...; 3:. */
4885
4886 offset = rel->r_offset;
4887 if (offset < 16)
4888 {
4889 _bfd_error_handler
4890 /* xgettext:c-format */
4891 (_("%pB(%pA): offset in relocation for LD->LE translation is too small: %#" PRIx64),
4892 input_bfd, input_section, (uint64_t) offset);
4893 return false;
4894 }
4895
4896 /* Size of LD instructions is 16 or 18. */
4897 offset -= 16;
4898 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4899 if ((insn & 0xff00) == 0xc700)
4900 {
4901 BFD_ASSERT (offset >= 2);
4902 offset -= 2;
4903 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4904 }
4905
4906 BFD_ASSERT ((insn & 0xff00) == 0xd400);
4907 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4908 BFD_ASSERT ((insn & 0xff00) == 0xc700);
4909 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4910 BFD_ASSERT ((insn & 0xff00) == 0xd100);
4911 insn = bfd_get_16 (input_bfd, contents + offset + 6);
4912 BFD_ASSERT (insn == 0x310c);
4913 insn = bfd_get_16 (input_bfd, contents + offset + 8);
4914 BFD_ASSERT (insn == 0x410b);
4915 insn = bfd_get_16 (input_bfd, contents + offset + 10);
4916 BFD_ASSERT (insn == 0x34cc);
4917
4918 bfd_put_16 (output_bfd, 0x0012, contents + offset + 0);
4919 bfd_put_16 (output_bfd, 0x0009, contents + offset + 2);
4920 bfd_put_16 (output_bfd, 0x0009, contents + offset + 4);
4921 bfd_put_16 (output_bfd, 0x0009, contents + offset + 6);
4922 bfd_put_16 (output_bfd, 0x0009, contents + offset + 8);
4923 bfd_put_16 (output_bfd, 0x0009, contents + offset + 10);
4924
4925 continue;
4926 }
4927
4928 if (sgot == NULL || sgotplt == NULL)
4929 abort ();
4930
4931 off = htab->tls_ldm_got.offset;
4932 if (off & 1)
4933 off &= ~1;
4934 else
4935 {
4936 Elf_Internal_Rela outrel;
4937 bfd_byte *loc;
4938
4939 outrel.r_offset = (sgot->output_section->vma
4940 + sgot->output_offset + off);
4941 outrel.r_addend = 0;
4942 outrel.r_info = ELF32_R_INFO (0, R_SH_TLS_DTPMOD32);
4943 loc = srelgot->contents;
4944 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4945 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4946 htab->tls_ldm_got.offset |= 1;
4947 }
4948
4949 relocation = sh_elf_got_offset (htab) + off;
4950 addend = rel->r_addend;
4951
4952 goto final_link_relocate;
4953
4954 case R_SH_TLS_LDO_32:
4955 check_segment[0] = check_segment[1] = -1;
4956 if (! bfd_link_pic (info))
4957 relocation = tpoff (info, relocation);
4958 else
4959 relocation -= dtpoff_base (info);
4960
4961 addend = rel->r_addend;
4962 goto final_link_relocate;
4963
4964 case R_SH_TLS_LE_32:
4965 {
4966 int indx;
4967 Elf_Internal_Rela outrel;
4968 bfd_byte *loc;
4969
4970 check_segment[0] = check_segment[1] = -1;
4971
4972 if (!bfd_link_dll (info))
4973 {
4974 relocation = tpoff (info, relocation);
4975 addend = rel->r_addend;
4976 goto final_link_relocate;
4977 }
4978
4979 if (sreloc == NULL)
4980 {
4981 sreloc = _bfd_elf_get_dynamic_reloc_section
4982 (input_bfd, input_section, /*rela?*/ true);
4983 if (sreloc == NULL)
4984 return false;
4985 }
4986
4987 if (h == NULL || h->dynindx == -1)
4988 indx = 0;
4989 else
4990 indx = h->dynindx;
4991
4992 outrel.r_offset = (input_section->output_section->vma
4993 + input_section->output_offset
4994 + rel->r_offset);
4995 outrel.r_info = ELF32_R_INFO (indx, R_SH_TLS_TPOFF32);
4996 if (indx == 0)
4997 outrel.r_addend = relocation - dtpoff_base (info);
4998 else
4999 outrel.r_addend = 0;
5000
5001 loc = sreloc->contents;
5002 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5003 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5004 continue;
5005 }
5006 }
5007
5008 relocation_done:
5009 if (fdpic_p && check_segment[0] != (unsigned) -1
5010 && check_segment[0] != check_segment[1])
5011 {
5012 /* We don't want duplicate errors for undefined symbols. */
5013 if (!h || h->root.type != bfd_link_hash_undefined)
5014 {
5015 if (bfd_link_pic (info))
5016 {
5017 info->callbacks->einfo
5018 /* xgettext:c-format */
5019 (_("%X%H: relocation to \"%s\" references a different segment\n"),
5020 input_bfd, input_section, rel->r_offset, symname);
5021 return false;
5022 }
5023 else
5024 info->callbacks->einfo
5025 /* xgettext:c-format */
5026 (_("%H: warning: relocation to \"%s\" references a different segment\n"),
5027 input_bfd, input_section, rel->r_offset, symname);
5028 }
5029
5030 elf_elfheader (output_bfd)->e_flags |= EF_SH_PIC;
5031 }
5032
5033 if (r != bfd_reloc_ok)
5034 {
5035 switch (r)
5036 {
5037 default:
5038 case bfd_reloc_outofrange:
5039 abort ();
5040 case bfd_reloc_overflow:
5041 {
5042 const char *name;
5043
5044 if (h != NULL)
5045 name = NULL;
5046 else
5047 {
5048 name = (bfd_elf_string_from_elf_section
5049 (input_bfd, symtab_hdr->sh_link, sym->st_name));
5050 if (name == NULL)
5051 return false;
5052 if (*name == '\0')
5053 name = bfd_section_name (sec);
5054 }
5055 (*info->callbacks->reloc_overflow)
5056 (info, (h ? &h->root : NULL), name, howto->name,
5057 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5058 }
5059 break;
5060 }
5061 }
5062 }
5063
5064 return true;
5065 }
5066
5067 /* This is a version of bfd_generic_get_relocated_section_contents
5068 which uses sh_elf_relocate_section. */
5069
5070 static bfd_byte *
5071 sh_elf_get_relocated_section_contents (bfd *output_bfd,
5072 struct bfd_link_info *link_info,
5073 struct bfd_link_order *link_order,
5074 bfd_byte *data,
5075 bool relocatable,
5076 asymbol **symbols)
5077 {
5078 Elf_Internal_Shdr *symtab_hdr;
5079 asection *input_section = link_order->u.indirect.section;
5080 bfd *input_bfd = input_section->owner;
5081 asection **sections = NULL;
5082 Elf_Internal_Rela *internal_relocs = NULL;
5083 Elf_Internal_Sym *isymbuf = NULL;
5084
5085 /* We only need to handle the case of relaxing, or of having a
5086 particular set of section contents, specially. */
5087 if (relocatable
5088 || elf_section_data (input_section)->this_hdr.contents == NULL)
5089 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
5090 link_order, data,
5091 relocatable,
5092 symbols);
5093
5094 symtab_hdr = &elf_symtab_hdr (input_bfd);
5095
5096 bfd_byte *orig_data = data;
5097 if (data == NULL)
5098 {
5099 data = bfd_malloc (input_section->size);
5100 if (data == NULL)
5101 return NULL;
5102 }
5103 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
5104 (size_t) input_section->size);
5105
5106 if ((input_section->flags & SEC_RELOC) != 0
5107 && input_section->reloc_count > 0)
5108 {
5109 asection **secpp;
5110 Elf_Internal_Sym *isym, *isymend;
5111 bfd_size_type amt;
5112
5113 internal_relocs = (_bfd_elf_link_read_relocs
5114 (input_bfd, input_section, NULL,
5115 (Elf_Internal_Rela *) NULL, false));
5116 if (internal_relocs == NULL)
5117 goto error_return;
5118
5119 if (symtab_hdr->sh_info != 0)
5120 {
5121 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5122 if (isymbuf == NULL)
5123 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
5124 symtab_hdr->sh_info, 0,
5125 NULL, NULL, NULL);
5126 if (isymbuf == NULL)
5127 goto error_return;
5128 }
5129
5130 amt = symtab_hdr->sh_info;
5131 amt *= sizeof (asection *);
5132 sections = (asection **) bfd_malloc (amt);
5133 if (sections == NULL && amt != 0)
5134 goto error_return;
5135
5136 isymend = isymbuf + symtab_hdr->sh_info;
5137 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
5138 {
5139 asection *isec;
5140
5141 if (isym->st_shndx == SHN_UNDEF)
5142 isec = bfd_und_section_ptr;
5143 else if (isym->st_shndx == SHN_ABS)
5144 isec = bfd_abs_section_ptr;
5145 else if (isym->st_shndx == SHN_COMMON)
5146 isec = bfd_com_section_ptr;
5147 else
5148 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
5149
5150 *secpp = isec;
5151 }
5152
5153 if (! sh_elf_relocate_section (output_bfd, link_info, input_bfd,
5154 input_section, data, internal_relocs,
5155 isymbuf, sections))
5156 goto error_return;
5157
5158 free (sections);
5159 if (symtab_hdr->contents != (unsigned char *) isymbuf)
5160 free (isymbuf);
5161 if (elf_section_data (input_section)->relocs != internal_relocs)
5162 free (internal_relocs);
5163 }
5164
5165 return data;
5166
5167 error_return:
5168 free (sections);
5169 if (symtab_hdr->contents != (unsigned char *) isymbuf)
5170 free (isymbuf);
5171 if (elf_section_data (input_section)->relocs != internal_relocs)
5172 free (internal_relocs);
5173 if (orig_data == NULL)
5174 free (data);
5175 return NULL;
5176 }
5177
5178 /* Return the base VMA address which should be subtracted from real addresses
5179 when resolving @dtpoff relocation.
5180 This is PT_TLS segment p_vaddr. */
5181
5182 static bfd_vma
5183 dtpoff_base (struct bfd_link_info *info)
5184 {
5185 /* If tls_sec is NULL, we should have signalled an error already. */
5186 if (elf_hash_table (info)->tls_sec == NULL)
5187 return 0;
5188 return elf_hash_table (info)->tls_sec->vma;
5189 }
5190
5191 /* Return the relocation value for R_SH_TLS_TPOFF32.. */
5192
5193 static bfd_vma
5194 tpoff (struct bfd_link_info *info, bfd_vma address)
5195 {
5196 /* If tls_sec is NULL, we should have signalled an error already. */
5197 if (elf_hash_table (info)->tls_sec == NULL)
5198 return 0;
5199 /* SH TLS ABI is variant I and static TLS block start just after tcbhead
5200 structure which has 2 pointer fields. */
5201 return (address - elf_hash_table (info)->tls_sec->vma
5202 + align_power ((bfd_vma) 8,
5203 elf_hash_table (info)->tls_sec->alignment_power));
5204 }
5205
5206 static asection *
5207 sh_elf_gc_mark_hook (asection *sec,
5208 struct bfd_link_info *info,
5209 Elf_Internal_Rela *rel,
5210 struct elf_link_hash_entry *h,
5211 Elf_Internal_Sym *sym)
5212 {
5213 if (h != NULL)
5214 switch (ELF32_R_TYPE (rel->r_info))
5215 {
5216 case R_SH_GNU_VTINHERIT:
5217 case R_SH_GNU_VTENTRY:
5218 return NULL;
5219 }
5220
5221 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5222 }
5223
5224 /* Copy the extra info we tack onto an elf_link_hash_entry. */
5225
5226 static void
5227 sh_elf_copy_indirect_symbol (struct bfd_link_info *info,
5228 struct elf_link_hash_entry *dir,
5229 struct elf_link_hash_entry *ind)
5230 {
5231 struct elf_sh_link_hash_entry *edir, *eind;
5232
5233 edir = (struct elf_sh_link_hash_entry *) dir;
5234 eind = (struct elf_sh_link_hash_entry *) ind;
5235
5236 edir->gotplt_refcount = eind->gotplt_refcount;
5237 eind->gotplt_refcount = 0;
5238 edir->funcdesc.refcount += eind->funcdesc.refcount;
5239 eind->funcdesc.refcount = 0;
5240 edir->abs_funcdesc_refcount += eind->abs_funcdesc_refcount;
5241 eind->abs_funcdesc_refcount = 0;
5242
5243 if (ind->root.type == bfd_link_hash_indirect
5244 && dir->got.refcount <= 0)
5245 {
5246 edir->got_type = eind->got_type;
5247 eind->got_type = GOT_UNKNOWN;
5248 }
5249
5250 if (ind->root.type != bfd_link_hash_indirect
5251 && dir->dynamic_adjusted)
5252 {
5253 /* If called to transfer flags for a weakdef during processing
5254 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
5255 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
5256 if (dir->versioned != versioned_hidden)
5257 dir->ref_dynamic |= ind->ref_dynamic;
5258 dir->ref_regular |= ind->ref_regular;
5259 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
5260 dir->needs_plt |= ind->needs_plt;
5261 }
5262 else
5263 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
5264 }
5265
5266 static int
5267 sh_elf_optimized_tls_reloc (struct bfd_link_info *info, int r_type,
5268 int is_local)
5269 {
5270 if (bfd_link_pic (info))
5271 return r_type;
5272
5273 switch (r_type)
5274 {
5275 case R_SH_TLS_GD_32:
5276 case R_SH_TLS_IE_32:
5277 if (is_local)
5278 return R_SH_TLS_LE_32;
5279 return R_SH_TLS_IE_32;
5280 case R_SH_TLS_LD_32:
5281 return R_SH_TLS_LE_32;
5282 }
5283
5284 return r_type;
5285 }
5286
5287 /* Look through the relocs for a section during the first phase.
5288 Since we don't do .gots or .plts, we just need to consider the
5289 virtual table relocs for gc. */
5290
5291 static bool
5292 sh_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
5293 const Elf_Internal_Rela *relocs)
5294 {
5295 Elf_Internal_Shdr *symtab_hdr;
5296 struct elf_link_hash_entry **sym_hashes;
5297 struct elf_sh_link_hash_table *htab;
5298 const Elf_Internal_Rela *rel;
5299 const Elf_Internal_Rela *rel_end;
5300 asection *sreloc;
5301 unsigned int r_type;
5302 enum got_type got_type, old_got_type;
5303
5304 sreloc = NULL;
5305
5306 if (bfd_link_relocatable (info))
5307 return true;
5308
5309 BFD_ASSERT (is_sh_elf (abfd));
5310
5311 symtab_hdr = &elf_symtab_hdr (abfd);
5312 sym_hashes = elf_sym_hashes (abfd);
5313
5314 htab = sh_elf_hash_table (info);
5315 if (htab == NULL)
5316 return false;
5317
5318 rel_end = relocs + sec->reloc_count;
5319 for (rel = relocs; rel < rel_end; rel++)
5320 {
5321 struct elf_link_hash_entry *h;
5322 unsigned long r_symndx;
5323
5324 r_symndx = ELF32_R_SYM (rel->r_info);
5325 r_type = ELF32_R_TYPE (rel->r_info);
5326
5327 if (r_symndx < symtab_hdr->sh_info)
5328 h = NULL;
5329 else
5330 {
5331 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5332 while (h->root.type == bfd_link_hash_indirect
5333 || h->root.type == bfd_link_hash_warning)
5334 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5335 }
5336
5337 r_type = sh_elf_optimized_tls_reloc (info, r_type, h == NULL);
5338 if (! bfd_link_pic (info)
5339 && r_type == R_SH_TLS_IE_32
5340 && h != NULL
5341 && h->root.type != bfd_link_hash_undefined
5342 && h->root.type != bfd_link_hash_undefweak
5343 && (h->dynindx == -1
5344 || h->def_regular))
5345 r_type = R_SH_TLS_LE_32;
5346
5347 if (htab->fdpic_p)
5348 switch (r_type)
5349 {
5350 case R_SH_GOTOFFFUNCDESC:
5351 case R_SH_GOTOFFFUNCDESC20:
5352 case R_SH_FUNCDESC:
5353 case R_SH_GOTFUNCDESC:
5354 case R_SH_GOTFUNCDESC20:
5355 if (h != NULL)
5356 {
5357 if (h->dynindx == -1)
5358 switch (ELF_ST_VISIBILITY (h->other))
5359 {
5360 case STV_INTERNAL:
5361 case STV_HIDDEN:
5362 break;
5363 default:
5364 bfd_elf_link_record_dynamic_symbol (info, h);
5365 break;
5366 }
5367 }
5368 break;
5369 }
5370
5371 /* Some relocs require a global offset table. */
5372 if (htab->root.sgot == NULL)
5373 {
5374 switch (r_type)
5375 {
5376 case R_SH_DIR32:
5377 /* This may require an rofixup. */
5378 if (!htab->fdpic_p)
5379 break;
5380 /* Fall through. */
5381 case R_SH_GOTPLT32:
5382 case R_SH_GOT32:
5383 case R_SH_GOT20:
5384 case R_SH_GOTOFF:
5385 case R_SH_GOTOFF20:
5386 case R_SH_FUNCDESC:
5387 case R_SH_GOTFUNCDESC:
5388 case R_SH_GOTFUNCDESC20:
5389 case R_SH_GOTOFFFUNCDESC:
5390 case R_SH_GOTOFFFUNCDESC20:
5391 case R_SH_GOTPC:
5392 case R_SH_TLS_GD_32:
5393 case R_SH_TLS_LD_32:
5394 case R_SH_TLS_IE_32:
5395 if (htab->root.dynobj == NULL)
5396 htab->root.dynobj = abfd;
5397 if (!create_got_section (htab->root.dynobj, info))
5398 return false;
5399 break;
5400
5401 default:
5402 break;
5403 }
5404 }
5405
5406 switch (r_type)
5407 {
5408 /* This relocation describes the C++ object vtable hierarchy.
5409 Reconstruct it for later use during GC. */
5410 case R_SH_GNU_VTINHERIT:
5411 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5412 return false;
5413 break;
5414
5415 /* This relocation describes which C++ vtable entries are actually
5416 used. Record for later use during GC. */
5417 case R_SH_GNU_VTENTRY:
5418 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5419 return false;
5420 break;
5421
5422 case R_SH_TLS_IE_32:
5423 if (bfd_link_pic (info))
5424 info->flags |= DF_STATIC_TLS;
5425
5426 /* FALLTHROUGH */
5427 force_got:
5428 case R_SH_TLS_GD_32:
5429 case R_SH_GOT32:
5430 case R_SH_GOT20:
5431 case R_SH_GOTFUNCDESC:
5432 case R_SH_GOTFUNCDESC20:
5433 switch (r_type)
5434 {
5435 default:
5436 got_type = GOT_NORMAL;
5437 break;
5438 case R_SH_TLS_GD_32:
5439 got_type = GOT_TLS_GD;
5440 break;
5441 case R_SH_TLS_IE_32:
5442 got_type = GOT_TLS_IE;
5443 break;
5444 case R_SH_GOTFUNCDESC:
5445 case R_SH_GOTFUNCDESC20:
5446 got_type = GOT_FUNCDESC;
5447 break;
5448 }
5449
5450 if (h != NULL)
5451 {
5452 h->got.refcount += 1;
5453 old_got_type = sh_elf_hash_entry (h)->got_type;
5454 }
5455 else
5456 {
5457 bfd_signed_vma *local_got_refcounts;
5458
5459 /* This is a global offset table entry for a local
5460 symbol. */
5461 local_got_refcounts = elf_local_got_refcounts (abfd);
5462 if (local_got_refcounts == NULL)
5463 {
5464 bfd_size_type size;
5465
5466 size = symtab_hdr->sh_info;
5467 size *= sizeof (bfd_signed_vma);
5468 size += symtab_hdr->sh_info;
5469 local_got_refcounts = ((bfd_signed_vma *)
5470 bfd_zalloc (abfd, size));
5471 if (local_got_refcounts == NULL)
5472 return false;
5473 elf_local_got_refcounts (abfd) = local_got_refcounts;
5474 sh_elf_local_got_type (abfd)
5475 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
5476 }
5477 local_got_refcounts[r_symndx] += 1;
5478 old_got_type = sh_elf_local_got_type (abfd) [r_symndx];
5479 }
5480
5481 /* If a TLS symbol is accessed using IE at least once,
5482 there is no point to use dynamic model for it. */
5483 if (old_got_type != got_type && old_got_type != GOT_UNKNOWN
5484 && (old_got_type != GOT_TLS_GD || got_type != GOT_TLS_IE))
5485 {
5486 if (old_got_type == GOT_TLS_IE && got_type == GOT_TLS_GD)
5487 got_type = GOT_TLS_IE;
5488 else
5489 {
5490 if ((old_got_type == GOT_FUNCDESC || got_type == GOT_FUNCDESC)
5491 && (old_got_type == GOT_NORMAL || got_type == GOT_NORMAL))
5492 _bfd_error_handler
5493 /* xgettext:c-format */
5494 (_("%pB: `%s' accessed both as normal and FDPIC symbol"),
5495 abfd, h->root.root.string);
5496 else if (old_got_type == GOT_FUNCDESC
5497 || got_type == GOT_FUNCDESC)
5498 _bfd_error_handler
5499 /* xgettext:c-format */
5500 (_("%pB: `%s' accessed both as FDPIC and thread local symbol"),
5501 abfd, h->root.root.string);
5502 else
5503 _bfd_error_handler
5504 /* xgettext:c-format */
5505 (_("%pB: `%s' accessed both as normal and thread local symbol"),
5506 abfd, h->root.root.string);
5507 return false;
5508 }
5509 }
5510
5511 if (old_got_type != got_type)
5512 {
5513 if (h != NULL)
5514 sh_elf_hash_entry (h)->got_type = got_type;
5515 else
5516 sh_elf_local_got_type (abfd) [r_symndx] = got_type;
5517 }
5518
5519 break;
5520
5521 case R_SH_TLS_LD_32:
5522 sh_elf_hash_table(info)->tls_ldm_got.refcount += 1;
5523 break;
5524
5525 case R_SH_FUNCDESC:
5526 case R_SH_GOTOFFFUNCDESC:
5527 case R_SH_GOTOFFFUNCDESC20:
5528 if (rel->r_addend)
5529 {
5530 _bfd_error_handler
5531 (_("%pB: Function descriptor relocation with non-zero addend"),
5532 abfd);
5533 return false;
5534 }
5535
5536 if (h == NULL)
5537 {
5538 union gotref *local_funcdesc;
5539
5540 /* We need a function descriptor for a local symbol. */
5541 local_funcdesc = sh_elf_local_funcdesc (abfd);
5542 if (local_funcdesc == NULL)
5543 {
5544 bfd_size_type size;
5545
5546 size = symtab_hdr->sh_info * sizeof (union gotref);
5547 local_funcdesc = (union gotref *) bfd_zalloc (abfd, size);
5548 if (local_funcdesc == NULL)
5549 return false;
5550 sh_elf_local_funcdesc (abfd) = local_funcdesc;
5551 }
5552 local_funcdesc[r_symndx].refcount += 1;
5553
5554 if (r_type == R_SH_FUNCDESC)
5555 {
5556 if (!bfd_link_pic (info))
5557 htab->srofixup->size += 4;
5558 else
5559 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5560 }
5561 }
5562 else
5563 {
5564 sh_elf_hash_entry (h)->funcdesc.refcount++;
5565 if (r_type == R_SH_FUNCDESC)
5566 sh_elf_hash_entry (h)->abs_funcdesc_refcount++;
5567
5568 /* If there is a function descriptor reference, then
5569 there should not be any non-FDPIC references. */
5570 old_got_type = sh_elf_hash_entry (h)->got_type;
5571 if (old_got_type != GOT_FUNCDESC && old_got_type != GOT_UNKNOWN)
5572 {
5573 if (old_got_type == GOT_NORMAL)
5574 _bfd_error_handler
5575 /* xgettext:c-format */
5576 (_("%pB: `%s' accessed both as normal and FDPIC symbol"),
5577 abfd, h->root.root.string);
5578 else
5579 _bfd_error_handler
5580 /* xgettext:c-format */
5581 (_("%pB: `%s' accessed both as FDPIC and thread local symbol"),
5582 abfd, h->root.root.string);
5583 }
5584 }
5585 break;
5586
5587 case R_SH_GOTPLT32:
5588 /* If this is a local symbol, we resolve it directly without
5589 creating a procedure linkage table entry. */
5590
5591 if (h == NULL
5592 || h->forced_local
5593 || ! bfd_link_pic (info)
5594 || info->symbolic
5595 || h->dynindx == -1)
5596 goto force_got;
5597
5598 h->needs_plt = 1;
5599 h->plt.refcount += 1;
5600 ((struct elf_sh_link_hash_entry *) h)->gotplt_refcount += 1;
5601
5602 break;
5603
5604 case R_SH_PLT32:
5605 /* This symbol requires a procedure linkage table entry. We
5606 actually build the entry in adjust_dynamic_symbol,
5607 because this might be a case of linking PIC code which is
5608 never referenced by a dynamic object, in which case we
5609 don't need to generate a procedure linkage table entry
5610 after all. */
5611
5612 /* If this is a local symbol, we resolve it directly without
5613 creating a procedure linkage table entry. */
5614 if (h == NULL)
5615 continue;
5616
5617 if (h->forced_local)
5618 break;
5619
5620 h->needs_plt = 1;
5621 h->plt.refcount += 1;
5622 break;
5623
5624 case R_SH_DIR32:
5625 case R_SH_REL32:
5626 if (h != NULL && ! bfd_link_pic (info))
5627 {
5628 h->non_got_ref = 1;
5629 h->plt.refcount += 1;
5630 }
5631
5632 /* If we are creating a shared library, and this is a reloc
5633 against a global symbol, or a non PC relative reloc
5634 against a local symbol, then we need to copy the reloc
5635 into the shared library. However, if we are linking with
5636 -Bsymbolic, we do not need to copy a reloc against a
5637 global symbol which is defined in an object we are
5638 including in the link (i.e., DEF_REGULAR is set). At
5639 this point we have not seen all the input files, so it is
5640 possible that DEF_REGULAR is not set now but will be set
5641 later (it is never cleared). We account for that
5642 possibility below by storing information in the
5643 dyn_relocs field of the hash table entry. A similar
5644 situation occurs when creating shared libraries and symbol
5645 visibility changes render the symbol local.
5646
5647 If on the other hand, we are creating an executable, we
5648 may need to keep relocations for symbols satisfied by a
5649 dynamic library if we manage to avoid copy relocs for the
5650 symbol. */
5651 if ((bfd_link_pic (info)
5652 && (sec->flags & SEC_ALLOC) != 0
5653 && (r_type != R_SH_REL32
5654 || (h != NULL
5655 && (! info->symbolic
5656 || h->root.type == bfd_link_hash_defweak
5657 || !h->def_regular))))
5658 || (! bfd_link_pic (info)
5659 && (sec->flags & SEC_ALLOC) != 0
5660 && h != NULL
5661 && (h->root.type == bfd_link_hash_defweak
5662 || !h->def_regular)))
5663 {
5664 struct elf_dyn_relocs *p;
5665 struct elf_dyn_relocs **head;
5666
5667 if (htab->root.dynobj == NULL)
5668 htab->root.dynobj = abfd;
5669
5670 /* When creating a shared object, we must copy these
5671 reloc types into the output file. We create a reloc
5672 section in dynobj and make room for this reloc. */
5673 if (sreloc == NULL)
5674 {
5675 sreloc = _bfd_elf_make_dynamic_reloc_section
5676 (sec, htab->root.dynobj, 2, abfd, /*rela?*/ true);
5677
5678 if (sreloc == NULL)
5679 return false;
5680 }
5681
5682 /* If this is a global symbol, we count the number of
5683 relocations we need for this symbol. */
5684 if (h != NULL)
5685 head = &h->dyn_relocs;
5686 else
5687 {
5688 /* Track dynamic relocs needed for local syms too. */
5689 asection *s;
5690 void *vpp;
5691 Elf_Internal_Sym *isym;
5692
5693 isym = bfd_sym_from_r_symndx (&htab->root.sym_cache,
5694 abfd, r_symndx);
5695 if (isym == NULL)
5696 return false;
5697
5698 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5699 if (s == NULL)
5700 s = sec;
5701
5702 vpp = &elf_section_data (s)->local_dynrel;
5703 head = (struct elf_dyn_relocs **) vpp;
5704 }
5705
5706 p = *head;
5707 if (p == NULL || p->sec != sec)
5708 {
5709 size_t amt = sizeof (*p);
5710 p = bfd_alloc (htab->root.dynobj, amt);
5711 if (p == NULL)
5712 return false;
5713 p->next = *head;
5714 *head = p;
5715 p->sec = sec;
5716 p->count = 0;
5717 p->pc_count = 0;
5718 }
5719
5720 p->count += 1;
5721 if (r_type == R_SH_REL32)
5722 p->pc_count += 1;
5723 }
5724
5725 /* Allocate the fixup regardless of whether we need a relocation.
5726 If we end up generating the relocation, we'll unallocate the
5727 fixup. */
5728 if (htab->fdpic_p && !bfd_link_pic (info)
5729 && r_type == R_SH_DIR32
5730 && (sec->flags & SEC_ALLOC) != 0)
5731 htab->srofixup->size += 4;
5732 break;
5733
5734 case R_SH_TLS_LE_32:
5735 if (bfd_link_dll (info))
5736 {
5737 _bfd_error_handler
5738 (_("%pB: TLS local exec code cannot be linked into shared objects"),
5739 abfd);
5740 return false;
5741 }
5742
5743 break;
5744
5745 case R_SH_TLS_LDO_32:
5746 /* Nothing to do. */
5747 break;
5748
5749 default:
5750 break;
5751 }
5752 }
5753
5754 return true;
5755 }
5756
5757 #ifndef sh_elf_set_mach_from_flags
5758 static unsigned int sh_ef_bfd_table[] = { EF_SH_BFD_TABLE };
5759
5760 static bool
5761 sh_elf_set_mach_from_flags (bfd *abfd)
5762 {
5763 flagword flags = elf_elfheader (abfd)->e_flags & EF_SH_MACH_MASK;
5764
5765 if (flags >= ARRAY_SIZE (sh_ef_bfd_table))
5766 return false;
5767
5768 if (sh_ef_bfd_table[flags] == 0)
5769 return false;
5770
5771 bfd_default_set_arch_mach (abfd, bfd_arch_sh, sh_ef_bfd_table[flags]);
5772
5773 return true;
5774 }
5775
5776
5777 /* Reverse table lookup for sh_ef_bfd_table[].
5778 Given a bfd MACH value from archures.c
5779 return the equivalent ELF flags from the table.
5780 Return -1 if no match is found. */
5781
5782 int
5783 sh_elf_get_flags_from_mach (unsigned long mach)
5784 {
5785 int i = ARRAY_SIZE (sh_ef_bfd_table) - 1;
5786
5787 for (; i>0; i--)
5788 if (sh_ef_bfd_table[i] == mach)
5789 return i;
5790
5791 /* shouldn't get here */
5792 BFD_FAIL();
5793
5794 return -1;
5795 }
5796 #endif /* not sh_elf_set_mach_from_flags */
5797
5798 #ifndef sh_elf_copy_private_data
5799 /* Copy backend specific data from one object module to another */
5800
5801 static bool
5802 sh_elf_copy_private_data (bfd * ibfd, bfd * obfd)
5803 {
5804 if (! is_sh_elf (ibfd) || ! is_sh_elf (obfd))
5805 return true;
5806
5807 if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd))
5808 return false;
5809
5810 return sh_elf_set_mach_from_flags (obfd);
5811 }
5812 #endif /* not sh_elf_copy_private_data */
5813
5814 #ifndef sh_elf_merge_private_data
5815
5816 /* This function returns the ELF architecture number that
5817 corresponds to the given arch_sh* flags. */
5818
5819 int
5820 sh_find_elf_flags (unsigned int arch_set)
5821 {
5822 extern unsigned long sh_get_bfd_mach_from_arch_set (unsigned int);
5823 unsigned long bfd_mach = sh_get_bfd_mach_from_arch_set (arch_set);
5824
5825 return sh_elf_get_flags_from_mach (bfd_mach);
5826 }
5827
5828 /* Merge the architecture type of two BFD files, such that the
5829 resultant architecture supports all the features required
5830 by the two input BFDs.
5831 If the input BFDs are multually incompatible - i.e. one uses
5832 DSP while the other uses FPU - or there is no known architecture
5833 that fits the requirements then an error is emitted. */
5834
5835 static bool
5836 sh_merge_bfd_arch (bfd *ibfd, struct bfd_link_info *info)
5837 {
5838 bfd *obfd = info->output_bfd;
5839 unsigned int old_arch, new_arch, merged_arch;
5840
5841 if (! _bfd_generic_verify_endian_match (ibfd, info))
5842 return false;
5843
5844 old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
5845 new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
5846
5847 merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
5848
5849 if (!SH_VALID_CO_ARCH_SET (merged_arch))
5850 {
5851 _bfd_error_handler
5852 /* xgettext:c-format */
5853 (_("%pB: uses %s instructions while previous modules "
5854 "use %s instructions"),
5855 ibfd,
5856 SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
5857 SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
5858 bfd_set_error (bfd_error_bad_value);
5859 return false;
5860 }
5861 else if (!SH_VALID_ARCH_SET (merged_arch))
5862 {
5863 _bfd_error_handler
5864 /* xgettext:c-format */
5865 (_("internal error: merge of architecture '%s' with "
5866 "architecture '%s' produced unknown architecture"),
5867 bfd_printable_name (obfd),
5868 bfd_printable_name (ibfd));
5869 bfd_set_error (bfd_error_bad_value);
5870 return false;
5871 }
5872
5873 bfd_default_set_arch_mach (obfd, bfd_arch_sh,
5874 sh_get_bfd_mach_from_arch_set (merged_arch));
5875
5876 return true;
5877 }
5878
5879 /* This routine initialises the elf flags when required and
5880 calls sh_merge_bfd_arch() to check dsp/fpu compatibility. */
5881
5882 static bool
5883 sh_elf_merge_private_data (bfd *ibfd, struct bfd_link_info *info)
5884 {
5885 bfd *obfd = info->output_bfd;
5886
5887 /* FIXME: What should be checked when linking shared libraries? */
5888 if ((ibfd->flags & DYNAMIC) != 0)
5889 return true;
5890
5891 if (! is_sh_elf (ibfd) || ! is_sh_elf (obfd))
5892 return true;
5893
5894 if (! elf_flags_init (obfd))
5895 {
5896 /* This happens when ld starts out with a 'blank' output file. */
5897 elf_flags_init (obfd) = true;
5898 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
5899 sh_elf_set_mach_from_flags (obfd);
5900 if (elf_elfheader (obfd)->e_flags & EF_SH_FDPIC)
5901 elf_elfheader (obfd)->e_flags &= ~EF_SH_PIC;
5902 }
5903
5904 if (! sh_merge_bfd_arch (ibfd, info))
5905 {
5906 _bfd_error_handler (_("%pB: uses instructions which are incompatible "
5907 "with instructions used in previous modules"),
5908 ibfd);
5909 bfd_set_error (bfd_error_bad_value);
5910 return false;
5911 }
5912
5913 elf_elfheader (obfd)->e_flags &= ~EF_SH_MACH_MASK;
5914 elf_elfheader (obfd)->e_flags |=
5915 sh_elf_get_flags_from_mach (bfd_get_mach (obfd));
5916
5917 if (fdpic_object_p (ibfd) != fdpic_object_p (obfd))
5918 {
5919 _bfd_error_handler (_("%pB: attempt to mix FDPIC and non-FDPIC objects"),
5920 ibfd);
5921 bfd_set_error (bfd_error_bad_value);
5922 return false;
5923 }
5924
5925 return true;
5926 }
5927 #endif /* not sh_elf_merge_private_data */
5928
5929 /* Override the generic function because we need to store sh_elf_obj_tdata
5930 as the specific tdata. We set also the machine architecture from flags
5931 here. */
5932
5933 static bool
5934 sh_elf_object_p (bfd *abfd)
5935 {
5936 if (! sh_elf_set_mach_from_flags (abfd))
5937 return false;
5938
5939 return (((elf_elfheader (abfd)->e_flags & EF_SH_FDPIC) != 0)
5940 == fdpic_object_p (abfd));
5941 }
5942
5943 /* Finish up dynamic symbol handling. We set the contents of various
5944 dynamic sections here. */
5945
5946 static bool
5947 sh_elf_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
5948 struct elf_link_hash_entry *h,
5949 Elf_Internal_Sym *sym)
5950 {
5951 struct elf_sh_link_hash_table *htab;
5952
5953 htab = sh_elf_hash_table (info);
5954 if (htab == NULL)
5955 return false;
5956
5957 if (h->plt.offset != (bfd_vma) -1)
5958 {
5959 asection *splt;
5960 asection *sgotplt;
5961 asection *srelplt;
5962
5963 bfd_vma plt_index;
5964 bfd_vma got_offset;
5965 Elf_Internal_Rela rel;
5966 bfd_byte *loc;
5967 const struct elf_sh_plt_info *plt_info;
5968
5969 /* This symbol has an entry in the procedure linkage table. Set
5970 it up. */
5971
5972 BFD_ASSERT (h->dynindx != -1);
5973
5974 splt = htab->root.splt;
5975 sgotplt = htab->root.sgotplt;
5976 srelplt = htab->root.srelplt;
5977 BFD_ASSERT (splt != NULL && sgotplt != NULL && srelplt != NULL);
5978
5979 /* Get the index in the procedure linkage table which
5980 corresponds to this symbol. This is the index of this symbol
5981 in all the symbols for which we are making plt entries. The
5982 first entry in the procedure linkage table is reserved. */
5983 plt_index = get_plt_index (htab->plt_info, h->plt.offset);
5984
5985 plt_info = htab->plt_info;
5986 if (plt_info->short_plt != NULL && plt_index <= MAX_SHORT_PLT)
5987 plt_info = plt_info->short_plt;
5988
5989 /* Get the offset into the .got table of the entry that
5990 corresponds to this function. */
5991 if (htab->fdpic_p)
5992 /* The offset must be relative to the GOT symbol, twelve bytes
5993 before the end of .got.plt. Each descriptor is eight
5994 bytes. */
5995 got_offset = plt_index * 8 + 12 - sgotplt->size;
5996 else
5997 /* Each .got entry is 4 bytes. The first three are
5998 reserved. */
5999 got_offset = (plt_index + 3) * 4;
6000
6001 #ifdef GOT_BIAS
6002 if (bfd_link_pic (info))
6003 got_offset -= GOT_BIAS;
6004 #endif
6005
6006 /* Fill in the entry in the procedure linkage table. */
6007 memcpy (splt->contents + h->plt.offset,
6008 plt_info->symbol_entry,
6009 plt_info->symbol_entry_size);
6010
6011 if (bfd_link_pic (info) || htab->fdpic_p)
6012 {
6013 if (plt_info->symbol_fields.got20)
6014 {
6015 bfd_reloc_status_type r;
6016 r = install_movi20_field (output_bfd, got_offset,
6017 splt->owner, splt, splt->contents,
6018 h->plt.offset
6019 + plt_info->symbol_fields.got_entry);
6020 BFD_ASSERT (r == bfd_reloc_ok);
6021 }
6022 else
6023 install_plt_field (output_bfd, false, got_offset,
6024 (splt->contents
6025 + h->plt.offset
6026 + plt_info->symbol_fields.got_entry));
6027 }
6028 else
6029 {
6030 BFD_ASSERT (!plt_info->symbol_fields.got20);
6031
6032 install_plt_field (output_bfd, false,
6033 (sgotplt->output_section->vma
6034 + sgotplt->output_offset
6035 + got_offset),
6036 (splt->contents
6037 + h->plt.offset
6038 + plt_info->symbol_fields.got_entry));
6039 if (htab->root.target_os == is_vxworks)
6040 {
6041 unsigned int reachable_plts, plts_per_4k;
6042 int distance;
6043
6044 /* Divide the PLT into groups. The first group contains
6045 REACHABLE_PLTS entries and the other groups contain
6046 PLTS_PER_4K entries. Entries in the first group can
6047 branch directly to .plt; those in later groups branch
6048 to the last element of the previous group. */
6049 /* ??? It would be better to create multiple copies of
6050 the common resolver stub. */
6051 reachable_plts = ((4096
6052 - plt_info->plt0_entry_size
6053 - (plt_info->symbol_fields.plt + 4))
6054 / plt_info->symbol_entry_size) + 1;
6055 plts_per_4k = (4096 / plt_info->symbol_entry_size);
6056 if (plt_index < reachable_plts)
6057 distance = -(h->plt.offset
6058 + plt_info->symbol_fields.plt);
6059 else
6060 distance = -(((plt_index - reachable_plts) % plts_per_4k + 1)
6061 * plt_info->symbol_entry_size);
6062
6063 /* Install the 'bra' with this offset. */
6064 bfd_put_16 (output_bfd,
6065 0xa000 | (0x0fff & ((distance - 4) / 2)),
6066 (splt->contents
6067 + h->plt.offset
6068 + plt_info->symbol_fields.plt));
6069 }
6070 else
6071 install_plt_field (output_bfd, true,
6072 splt->output_section->vma + splt->output_offset,
6073 (splt->contents
6074 + h->plt.offset
6075 + plt_info->symbol_fields.plt));
6076 }
6077
6078 /* Make got_offset relative to the start of .got.plt. */
6079 #ifdef GOT_BIAS
6080 if (bfd_link_pic (info))
6081 got_offset += GOT_BIAS;
6082 #endif
6083 if (htab->fdpic_p)
6084 got_offset = plt_index * 8;
6085
6086 if (plt_info->symbol_fields.reloc_offset != MINUS_ONE)
6087 install_plt_field (output_bfd, false,
6088 plt_index * sizeof (Elf32_External_Rela),
6089 (splt->contents
6090 + h->plt.offset
6091 + plt_info->symbol_fields.reloc_offset));
6092
6093 /* Fill in the entry in the global offset table. */
6094 bfd_put_32 (output_bfd,
6095 (splt->output_section->vma
6096 + splt->output_offset
6097 + h->plt.offset
6098 + plt_info->symbol_resolve_offset),
6099 sgotplt->contents + got_offset);
6100 if (htab->fdpic_p)
6101 bfd_put_32 (output_bfd,
6102 sh_elf_osec_to_segment (output_bfd, splt->output_section),
6103 sgotplt->contents + got_offset + 4);
6104
6105 /* Fill in the entry in the .rela.plt section. */
6106 rel.r_offset = (sgotplt->output_section->vma
6107 + sgotplt->output_offset
6108 + got_offset);
6109 if (htab->fdpic_p)
6110 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_FUNCDESC_VALUE);
6111 else
6112 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_JMP_SLOT);
6113 rel.r_addend = 0;
6114 #ifdef GOT_BIAS
6115 rel.r_addend = GOT_BIAS;
6116 #endif
6117 loc = srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
6118 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6119
6120 if (htab->root.target_os == is_vxworks && !bfd_link_pic (info))
6121 {
6122 /* Create the .rela.plt.unloaded relocations for this PLT entry.
6123 Begin by pointing LOC to the first such relocation. */
6124 loc = (htab->srelplt2->contents
6125 + (plt_index * 2 + 1) * sizeof (Elf32_External_Rela));
6126
6127 /* Create a .rela.plt.unloaded R_SH_DIR32 relocation
6128 for the PLT entry's pointer to the .got.plt entry. */
6129 rel.r_offset = (splt->output_section->vma
6130 + splt->output_offset
6131 + h->plt.offset
6132 + plt_info->symbol_fields.got_entry);
6133 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_SH_DIR32);
6134 rel.r_addend = got_offset;
6135 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6136 loc += sizeof (Elf32_External_Rela);
6137
6138 /* Create a .rela.plt.unloaded R_SH_DIR32 relocation for
6139 the .got.plt entry, which initially points to .plt. */
6140 rel.r_offset = (sgotplt->output_section->vma
6141 + sgotplt->output_offset
6142 + got_offset);
6143 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_SH_DIR32);
6144 rel.r_addend = 0;
6145 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6146 }
6147
6148 if (!h->def_regular)
6149 {
6150 /* Mark the symbol as undefined, rather than as defined in
6151 the .plt section. Leave the value alone. */
6152 sym->st_shndx = SHN_UNDEF;
6153 }
6154 }
6155
6156 if (h->got.offset != (bfd_vma) -1
6157 && sh_elf_hash_entry (h)->got_type != GOT_TLS_GD
6158 && sh_elf_hash_entry (h)->got_type != GOT_TLS_IE
6159 && sh_elf_hash_entry (h)->got_type != GOT_FUNCDESC)
6160 {
6161 asection *sgot;
6162 asection *srelgot;
6163 Elf_Internal_Rela rel;
6164 bfd_byte *loc;
6165
6166 /* This symbol has an entry in the global offset table. Set it
6167 up. */
6168
6169 sgot = htab->root.sgot;
6170 srelgot = htab->root.srelgot;
6171 BFD_ASSERT (sgot != NULL && srelgot != NULL);
6172
6173 rel.r_offset = (sgot->output_section->vma
6174 + sgot->output_offset
6175 + (h->got.offset &~ (bfd_vma) 1));
6176
6177 /* If this is a static link, or it is a -Bsymbolic link and the
6178 symbol is defined locally or was forced to be local because
6179 of a version file, we just want to emit a RELATIVE reloc.
6180 The entry in the global offset table will already have been
6181 initialized in the relocate_section function. */
6182 if (bfd_link_pic (info)
6183 && (h->root.type == bfd_link_hash_defined
6184 || h->root.type == bfd_link_hash_defweak)
6185 && SYMBOL_REFERENCES_LOCAL (info, h))
6186 {
6187 if (htab->fdpic_p)
6188 {
6189 asection *sec = h->root.u.def.section;
6190 int dynindx
6191 = elf_section_data (sec->output_section)->dynindx;
6192
6193 rel.r_info = ELF32_R_INFO (dynindx, R_SH_DIR32);
6194 rel.r_addend = (h->root.u.def.value
6195 + h->root.u.def.section->output_offset);
6196 }
6197 else
6198 {
6199 rel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
6200 rel.r_addend = (h->root.u.def.value
6201 + h->root.u.def.section->output_section->vma
6202 + h->root.u.def.section->output_offset);
6203 }
6204 }
6205 else
6206 {
6207 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
6208 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_GLOB_DAT);
6209 rel.r_addend = 0;
6210 }
6211
6212 loc = srelgot->contents;
6213 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
6214 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6215 }
6216
6217 if (h->needs_copy)
6218 {
6219 asection *s;
6220 Elf_Internal_Rela rel;
6221 bfd_byte *loc;
6222
6223 /* This symbol needs a copy reloc. Set it up. */
6224
6225 BFD_ASSERT (h->dynindx != -1
6226 && (h->root.type == bfd_link_hash_defined
6227 || h->root.type == bfd_link_hash_defweak));
6228
6229 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss");
6230 BFD_ASSERT (s != NULL);
6231
6232 rel.r_offset = (h->root.u.def.value
6233 + h->root.u.def.section->output_section->vma
6234 + h->root.u.def.section->output_offset);
6235 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_COPY);
6236 rel.r_addend = 0;
6237 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
6238 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6239 }
6240
6241 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
6242 _GLOBAL_OFFSET_TABLE_ is not absolute: it is relative to the
6243 ".got" section. */
6244 if (h == htab->root.hdynamic
6245 || (htab->root.target_os != is_vxworks && h == htab->root.hgot))
6246 sym->st_shndx = SHN_ABS;
6247
6248 return true;
6249 }
6250
6251 /* Finish up the dynamic sections. */
6252
6253 static bool
6254 sh_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
6255 {
6256 struct elf_sh_link_hash_table *htab;
6257 asection *sgotplt;
6258 asection *sdyn;
6259
6260 htab = sh_elf_hash_table (info);
6261 if (htab == NULL)
6262 return false;
6263
6264 sgotplt = htab->root.sgotplt;
6265 sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic");
6266
6267 if (htab->root.dynamic_sections_created)
6268 {
6269 asection *splt;
6270 Elf32_External_Dyn *dyncon, *dynconend;
6271
6272 BFD_ASSERT (sgotplt != NULL && sdyn != NULL);
6273
6274 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6275 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6276 for (; dyncon < dynconend; dyncon++)
6277 {
6278 Elf_Internal_Dyn dyn;
6279 asection *s;
6280
6281 bfd_elf32_swap_dyn_in (htab->root.dynobj, dyncon, &dyn);
6282
6283 switch (dyn.d_tag)
6284 {
6285 default:
6286 if (htab->root.target_os == is_vxworks
6287 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
6288 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6289 break;
6290
6291 case DT_PLTGOT:
6292 BFD_ASSERT (htab->root.hgot != NULL);
6293 s = htab->root.hgot->root.u.def.section;
6294 dyn.d_un.d_ptr = htab->root.hgot->root.u.def.value
6295 + s->output_section->vma + s->output_offset;
6296 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6297 break;
6298
6299 case DT_JMPREL:
6300 s = htab->root.srelplt;
6301 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6302 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6303 break;
6304
6305 case DT_PLTRELSZ:
6306 s = htab->root.srelplt;
6307 dyn.d_un.d_val = s->size;
6308 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6309 break;
6310 }
6311 }
6312
6313 /* Fill in the first entry in the procedure linkage table. */
6314 splt = htab->root.splt;
6315 if (splt && splt->size > 0 && htab->plt_info->plt0_entry)
6316 {
6317 unsigned int i;
6318
6319 memcpy (splt->contents,
6320 htab->plt_info->plt0_entry,
6321 htab->plt_info->plt0_entry_size);
6322 for (i = 0; i < ARRAY_SIZE (htab->plt_info->plt0_got_fields); i++)
6323 if (htab->plt_info->plt0_got_fields[i] != MINUS_ONE)
6324 install_plt_field (output_bfd, false,
6325 (sgotplt->output_section->vma
6326 + sgotplt->output_offset
6327 + (i * 4)),
6328 (splt->contents
6329 + htab->plt_info->plt0_got_fields[i]));
6330
6331 if (htab->root.target_os == is_vxworks)
6332 {
6333 /* Finalize the .rela.plt.unloaded contents. */
6334 Elf_Internal_Rela rel;
6335 bfd_byte *loc;
6336
6337 /* Create a .rela.plt.unloaded R_SH_DIR32 relocation for the
6338 first PLT entry's pointer to _GLOBAL_OFFSET_TABLE_ + 8. */
6339 loc = htab->srelplt2->contents;
6340 rel.r_offset = (splt->output_section->vma
6341 + splt->output_offset
6342 + htab->plt_info->plt0_got_fields[2]);
6343 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_SH_DIR32);
6344 rel.r_addend = 8;
6345 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6346 loc += sizeof (Elf32_External_Rela);
6347
6348 /* Fix up the remaining .rela.plt.unloaded relocations.
6349 They may have the wrong symbol index for _G_O_T_ or
6350 _P_L_T_ depending on the order in which symbols were
6351 output. */
6352 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
6353 {
6354 /* The PLT entry's pointer to the .got.plt slot. */
6355 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
6356 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx,
6357 R_SH_DIR32);
6358 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6359 loc += sizeof (Elf32_External_Rela);
6360
6361 /* The .got.plt slot's pointer to .plt. */
6362 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
6363 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx,
6364 R_SH_DIR32);
6365 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6366 loc += sizeof (Elf32_External_Rela);
6367 }
6368 }
6369
6370 /* UnixWare sets the entsize of .plt to 4, although that doesn't
6371 really seem like the right value. */
6372 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
6373 }
6374 }
6375
6376 /* Fill in the first three entries in the global offset table. */
6377 if (sgotplt && sgotplt->size > 0 && !htab->fdpic_p)
6378 {
6379 if (sdyn == NULL)
6380 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents);
6381 else
6382 bfd_put_32 (output_bfd,
6383 sdyn->output_section->vma + sdyn->output_offset,
6384 sgotplt->contents);
6385 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4);
6386 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8);
6387 }
6388
6389 if (sgotplt && sgotplt->size > 0)
6390 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4;
6391
6392 /* At the very end of the .rofixup section is a pointer to the GOT. */
6393 if (htab->fdpic_p && htab->srofixup != NULL)
6394 {
6395 struct elf_link_hash_entry *hgot = htab->root.hgot;
6396 bfd_vma got_value = hgot->root.u.def.value
6397 + hgot->root.u.def.section->output_section->vma
6398 + hgot->root.u.def.section->output_offset;
6399
6400 sh_elf_add_rofixup (output_bfd, htab->srofixup, got_value);
6401
6402 /* Make sure we allocated and generated the same number of fixups. */
6403 BFD_ASSERT (htab->srofixup->reloc_count * 4 == htab->srofixup->size);
6404 }
6405
6406 if (htab->srelfuncdesc)
6407 BFD_ASSERT (htab->srelfuncdesc->reloc_count * sizeof (Elf32_External_Rela)
6408 == htab->srelfuncdesc->size);
6409
6410 if (htab->root.srelgot)
6411 BFD_ASSERT (htab->root.srelgot->reloc_count * sizeof (Elf32_External_Rela)
6412 == htab->root.srelgot->size);
6413
6414 return true;
6415 }
6416
6417 static enum elf_reloc_type_class
6418 sh_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6419 const asection *rel_sec ATTRIBUTE_UNUSED,
6420 const Elf_Internal_Rela *rela)
6421 {
6422 switch ((int) ELF32_R_TYPE (rela->r_info))
6423 {
6424 case R_SH_RELATIVE:
6425 return reloc_class_relative;
6426 case R_SH_JMP_SLOT:
6427 return reloc_class_plt;
6428 case R_SH_COPY:
6429 return reloc_class_copy;
6430 default:
6431 return reloc_class_normal;
6432 }
6433 }
6434
6435 #if !defined SH_TARGET_ALREADY_DEFINED
6436 /* Support for Linux core dump NOTE sections. */
6437
6438 static bool
6439 elf32_shlin_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6440 {
6441 int offset;
6442 unsigned int size;
6443
6444 switch (note->descsz)
6445 {
6446 default:
6447 return false;
6448
6449 case 168: /* Linux/SH */
6450 /* pr_cursig */
6451 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
6452
6453 /* pr_pid */
6454 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
6455
6456 /* pr_reg */
6457 offset = 72;
6458 size = 92;
6459
6460 break;
6461 }
6462
6463 /* Make a ".reg/999" section. */
6464 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6465 size, note->descpos + offset);
6466 }
6467
6468 static bool
6469 elf32_shlin_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6470 {
6471 switch (note->descsz)
6472 {
6473 default:
6474 return false;
6475
6476 case 124: /* Linux/SH elf_prpsinfo */
6477 elf_tdata (abfd)->core->program
6478 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
6479 elf_tdata (abfd)->core->command
6480 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
6481 }
6482
6483 /* Note that for some reason, a spurious space is tacked
6484 onto the end of the args in some (at least one anyway)
6485 implementations, so strip it off if it exists. */
6486
6487 {
6488 char *command = elf_tdata (abfd)->core->command;
6489 int n = strlen (command);
6490
6491 if (0 < n && command[n - 1] == ' ')
6492 command[n - 1] = '\0';
6493 }
6494
6495 return true;
6496 }
6497 #endif /* not SH_TARGET_ALREADY_DEFINED */
6498
6499
6500 /* Return address for Ith PLT stub in section PLT, for relocation REL
6501 or (bfd_vma) -1 if it should not be included. */
6502
6503 static bfd_vma
6504 sh_elf_plt_sym_val (bfd_vma i, const asection *plt,
6505 const arelent *rel ATTRIBUTE_UNUSED)
6506 {
6507 const struct elf_sh_plt_info *plt_info;
6508
6509 plt_info = get_plt_info (plt->owner, (plt->owner->flags & DYNAMIC) != 0);
6510 return plt->vma + get_plt_offset (plt_info, i);
6511 }
6512
6513 /* Decide whether to attempt to turn absptr or lsda encodings in
6514 shared libraries into pcrel within the given input section. */
6515
6516 static bool
6517 sh_elf_use_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED,
6518 struct bfd_link_info *info,
6519 asection *eh_frame_section ATTRIBUTE_UNUSED)
6520 {
6521 struct elf_sh_link_hash_table *htab = sh_elf_hash_table (info);
6522
6523 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6524 if (htab->fdpic_p)
6525 return false;
6526
6527 return true;
6528 }
6529
6530 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6531
6532 static bfd_byte
6533 sh_elf_encode_eh_address (bfd *abfd,
6534 struct bfd_link_info *info,
6535 asection *osec, bfd_vma offset,
6536 asection *loc_sec, bfd_vma loc_offset,
6537 bfd_vma *encoded)
6538 {
6539 struct elf_sh_link_hash_table *htab = sh_elf_hash_table (info);
6540 struct elf_link_hash_entry *h;
6541
6542 if (!htab->fdpic_p)
6543 return _bfd_elf_encode_eh_address (abfd, info, osec, offset, loc_sec,
6544 loc_offset, encoded);
6545
6546 h = htab->root.hgot;
6547 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
6548
6549 if (! h || (sh_elf_osec_to_segment (abfd, osec)
6550 == sh_elf_osec_to_segment (abfd, loc_sec->output_section)))
6551 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
6552 loc_sec, loc_offset, encoded);
6553
6554 BFD_ASSERT (sh_elf_osec_to_segment (abfd, osec)
6555 == (sh_elf_osec_to_segment
6556 (abfd, h->root.u.def.section->output_section)));
6557
6558 *encoded = osec->vma + offset
6559 - (h->root.u.def.value
6560 + h->root.u.def.section->output_section->vma
6561 + h->root.u.def.section->output_offset);
6562
6563 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
6564 }
6565
6566 #if !defined SH_TARGET_ALREADY_DEFINED
6567 #define TARGET_BIG_SYM sh_elf32_vec
6568 #define TARGET_BIG_NAME "elf32-sh"
6569 #define TARGET_LITTLE_SYM sh_elf32_le_vec
6570 #define TARGET_LITTLE_NAME "elf32-shl"
6571 #endif
6572
6573 #define ELF_ARCH bfd_arch_sh
6574 #define ELF_TARGET_ID SH_ELF_DATA
6575 #define ELF_MACHINE_CODE EM_SH
6576 #ifdef __QNXTARGET__
6577 #define ELF_MAXPAGESIZE 0x1000
6578 #else
6579 #define ELF_MAXPAGESIZE 0x80
6580 #endif
6581
6582 #define elf_symbol_leading_char '_'
6583
6584 #define bfd_elf32_bfd_reloc_type_lookup sh_elf_reloc_type_lookup
6585 #define bfd_elf32_bfd_reloc_name_lookup \
6586 sh_elf_reloc_name_lookup
6587 #define elf_info_to_howto sh_elf_info_to_howto
6588 #define bfd_elf32_bfd_relax_section sh_elf_relax_section
6589 #define elf_backend_relocate_section sh_elf_relocate_section
6590 #define bfd_elf32_bfd_get_relocated_section_contents \
6591 sh_elf_get_relocated_section_contents
6592 #define bfd_elf32_mkobject sh_elf_mkobject
6593 #define elf_backend_object_p sh_elf_object_p
6594 #define bfd_elf32_bfd_copy_private_bfd_data \
6595 sh_elf_copy_private_data
6596 #define bfd_elf32_bfd_merge_private_bfd_data \
6597 sh_elf_merge_private_data
6598
6599 #define elf_backend_gc_mark_hook sh_elf_gc_mark_hook
6600 #define elf_backend_check_relocs sh_elf_check_relocs
6601 #define elf_backend_copy_indirect_symbol \
6602 sh_elf_copy_indirect_symbol
6603 #define elf_backend_create_dynamic_sections \
6604 sh_elf_create_dynamic_sections
6605 #define bfd_elf32_bfd_link_hash_table_create \
6606 sh_elf_link_hash_table_create
6607 #define elf_backend_adjust_dynamic_symbol \
6608 sh_elf_adjust_dynamic_symbol
6609 #define elf_backend_always_size_sections \
6610 sh_elf_always_size_sections
6611 #define elf_backend_size_dynamic_sections \
6612 sh_elf_size_dynamic_sections
6613 #define elf_backend_omit_section_dynsym sh_elf_omit_section_dynsym
6614 #define elf_backend_finish_dynamic_symbol \
6615 sh_elf_finish_dynamic_symbol
6616 #define elf_backend_finish_dynamic_sections \
6617 sh_elf_finish_dynamic_sections
6618 #define elf_backend_reloc_type_class sh_elf_reloc_type_class
6619 #define elf_backend_plt_sym_val sh_elf_plt_sym_val
6620 #define elf_backend_can_make_relative_eh_frame \
6621 sh_elf_use_relative_eh_frame
6622 #define elf_backend_can_make_lsda_relative_eh_frame \
6623 sh_elf_use_relative_eh_frame
6624 #define elf_backend_encode_eh_address \
6625 sh_elf_encode_eh_address
6626
6627 #define elf_backend_stack_align 8
6628 #define elf_backend_can_gc_sections 1
6629 #define elf_backend_can_refcount 1
6630 #define elf_backend_want_got_plt 1
6631 #define elf_backend_plt_readonly 1
6632 #define elf_backend_want_plt_sym 0
6633 #define elf_backend_got_header_size 12
6634 #define elf_backend_dtrel_excludes_plt 1
6635
6636 #define elf_backend_linux_prpsinfo32_ugid16 true
6637
6638 #if !defined SH_TARGET_ALREADY_DEFINED
6639
6640 #include "elf32-target.h"
6641
6642 /* NetBSD support. */
6643 #undef TARGET_BIG_SYM
6644 #define TARGET_BIG_SYM sh_elf32_nbsd_vec
6645 #undef TARGET_BIG_NAME
6646 #define TARGET_BIG_NAME "elf32-sh-nbsd"
6647 #undef TARGET_LITTLE_SYM
6648 #define TARGET_LITTLE_SYM sh_elf32_nbsd_le_vec
6649 #undef TARGET_LITTLE_NAME
6650 #define TARGET_LITTLE_NAME "elf32-shl-nbsd"
6651 #undef ELF_MAXPAGESIZE
6652 #define ELF_MAXPAGESIZE 0x10000
6653 #undef ELF_COMMONPAGESIZE
6654 #undef elf_symbol_leading_char
6655 #define elf_symbol_leading_char 0
6656 #undef elf32_bed
6657 #define elf32_bed elf32_sh_nbsd_bed
6658
6659 #include "elf32-target.h"
6660
6661
6662 /* Linux support. */
6663 #undef TARGET_BIG_SYM
6664 #define TARGET_BIG_SYM sh_elf32_linux_be_vec
6665 #undef TARGET_BIG_NAME
6666 #define TARGET_BIG_NAME "elf32-shbig-linux"
6667 #undef TARGET_LITTLE_SYM
6668 #define TARGET_LITTLE_SYM sh_elf32_linux_vec
6669 #undef TARGET_LITTLE_NAME
6670 #define TARGET_LITTLE_NAME "elf32-sh-linux"
6671 #undef ELF_COMMONPAGESIZE
6672 #define ELF_COMMONPAGESIZE 0x1000
6673
6674 #undef elf_backend_grok_prstatus
6675 #define elf_backend_grok_prstatus elf32_shlin_grok_prstatus
6676 #undef elf_backend_grok_psinfo
6677 #define elf_backend_grok_psinfo elf32_shlin_grok_psinfo
6678 #undef elf32_bed
6679 #define elf32_bed elf32_sh_lin_bed
6680
6681 #include "elf32-target.h"
6682
6683
6684 /* FDPIC support. */
6685 #undef TARGET_BIG_SYM
6686 #define TARGET_BIG_SYM sh_elf32_fdpic_be_vec
6687 #undef TARGET_BIG_NAME
6688 #define TARGET_BIG_NAME "elf32-shbig-fdpic"
6689 #undef TARGET_LITTLE_SYM
6690 #define TARGET_LITTLE_SYM sh_elf32_fdpic_le_vec
6691 #undef TARGET_LITTLE_NAME
6692 #define TARGET_LITTLE_NAME "elf32-sh-fdpic"
6693
6694 #undef elf32_bed
6695 #define elf32_bed elf32_sh_fd_bed
6696
6697 #include "elf32-target.h"
6698
6699 /* VxWorks support. */
6700 #undef TARGET_BIG_SYM
6701 #define TARGET_BIG_SYM sh_elf32_vxworks_vec
6702 #undef TARGET_BIG_NAME
6703 #define TARGET_BIG_NAME "elf32-sh-vxworks"
6704 #undef TARGET_LITTLE_SYM
6705 #define TARGET_LITTLE_SYM sh_elf32_vxworks_le_vec
6706 #undef TARGET_LITTLE_NAME
6707 #define TARGET_LITTLE_NAME "elf32-shl-vxworks"
6708 #undef elf32_bed
6709 #define elf32_bed elf32_sh_vxworks_bed
6710
6711 #undef elf_backend_want_plt_sym
6712 #define elf_backend_want_plt_sym 1
6713 #undef elf_symbol_leading_char
6714 #define elf_symbol_leading_char '_'
6715 #define elf_backend_want_got_underscore 1
6716 #undef elf_backend_grok_prstatus
6717 #undef elf_backend_grok_psinfo
6718 #undef elf_backend_add_symbol_hook
6719 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
6720 #undef elf_backend_link_output_symbol_hook
6721 #define elf_backend_link_output_symbol_hook \
6722 elf_vxworks_link_output_symbol_hook
6723 #undef elf_backend_emit_relocs
6724 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6725 #undef elf_backend_final_write_processing
6726 #define elf_backend_final_write_processing \
6727 elf_vxworks_final_write_processing
6728 #undef ELF_MAXPAGESIZE
6729 #define ELF_MAXPAGESIZE 0x1000
6730 #undef ELF_COMMONPAGESIZE
6731
6732 #undef ELF_TARGET_OS
6733 #define ELF_TARGET_OS is_vxworks
6734
6735 #include "elf32-target.h"
6736
6737 #endif /* not SH_TARGET_ALREADY_DEFINED */
6738