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1 /* Renesas / SuperH SH specific support for 32-bit ELF
2 Copyright (C) 1996-2018 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 static bfd_reloc_status_type sh_elf_reloc
34 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
35 static bfd_reloc_status_type sh_elf_ignore_reloc
36 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 static bfd_boolean sh_elf_relax_delete_bytes
38 (bfd *, asection *, bfd_vma, int);
39 static bfd_boolean sh_elf_align_loads
40 (bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_boolean *);
41 static bfd_boolean sh_elf_swap_insns
42 (bfd *, asection *, void *, bfd_byte *, bfd_vma);
43 static int sh_elf_optimized_tls_reloc
44 (struct bfd_link_info *, int, int);
45 static bfd_vma dtpoff_base
46 (struct bfd_link_info *);
47 static bfd_vma tpoff
48 (struct bfd_link_info *, bfd_vma);
49
50 /* The name of the dynamic interpreter. This is put in the .interp
51 section. */
52
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
54
55 /* FDPIC binaries have a default 128K stack. */
56 #define DEFAULT_STACK_SIZE 0x20000
57
58 #define MINUS_ONE ((bfd_vma) 0 - 1)
59
60 /* Decide whether a reference to a symbol can be resolved locally or
61 not. If the symbol is protected, we want the local address, but
62 its function descriptor must be assigned by the dynamic linker. */
63 #define SYMBOL_FUNCDESC_LOCAL(INFO, H) \
64 (SYMBOL_REFERENCES_LOCAL (INFO, H) \
65 || ! elf_hash_table (INFO)->dynamic_sections_created)
66 \f
67 #define SH_PARTIAL32 TRUE
68 #define SH_SRC_MASK32 0xffffffff
69 #define SH_ELF_RELOC sh_elf_reloc
70 static reloc_howto_type sh_elf_howto_table[] =
71 {
72 #include "elf32-sh-relocs.h"
73 };
74
75 #define SH_PARTIAL32 FALSE
76 #define SH_SRC_MASK32 0
77 #define SH_ELF_RELOC bfd_elf_generic_reloc
78 static reloc_howto_type sh_vxworks_howto_table[] =
79 {
80 #include "elf32-sh-relocs.h"
81 };
82 \f
83 /* Return true if OUTPUT_BFD is a VxWorks object. */
84
85 static bfd_boolean
86 vxworks_object_p (bfd *abfd ATTRIBUTE_UNUSED)
87 {
88 #if !defined SH_TARGET_ALREADY_DEFINED
89 extern const bfd_target sh_elf32_vxworks_le_vec;
90 extern const bfd_target sh_elf32_vxworks_vec;
91
92 return (abfd->xvec == &sh_elf32_vxworks_le_vec
93 || abfd->xvec == &sh_elf32_vxworks_vec);
94 #else
95 return FALSE;
96 #endif
97 }
98
99 /* Return true if OUTPUT_BFD is an FDPIC object. */
100
101 static bfd_boolean
102 fdpic_object_p (bfd *abfd ATTRIBUTE_UNUSED)
103 {
104 #if !defined SH_TARGET_ALREADY_DEFINED
105 extern const bfd_target sh_elf32_fdpic_le_vec;
106 extern const bfd_target sh_elf32_fdpic_be_vec;
107
108 return (abfd->xvec == &sh_elf32_fdpic_le_vec
109 || abfd->xvec == &sh_elf32_fdpic_be_vec);
110 #else
111 return FALSE;
112 #endif
113 }
114
115 /* Return the howto table for ABFD. */
116
117 static reloc_howto_type *
118 get_howto_table (bfd *abfd)
119 {
120 if (vxworks_object_p (abfd))
121 return sh_vxworks_howto_table;
122 return sh_elf_howto_table;
123 }
124
125 static bfd_reloc_status_type
126 sh_elf_reloc_loop (int r_type ATTRIBUTE_UNUSED, bfd *input_bfd,
127 asection *input_section, bfd_byte *contents,
128 bfd_vma addr, asection *symbol_section,
129 bfd_vma start, bfd_vma end)
130 {
131 static bfd_vma last_addr;
132 static asection *last_symbol_section;
133 bfd_byte *start_ptr, *ptr, *last_ptr;
134 int diff, cum_diff;
135 bfd_signed_vma x;
136 int insn;
137
138 /* Sanity check the address. */
139 if (addr > bfd_get_section_limit (input_bfd, input_section))
140 return bfd_reloc_outofrange;
141
142 /* We require the start and end relocations to be processed consecutively -
143 although we allow then to be processed forwards or backwards. */
144 if (! last_addr)
145 {
146 last_addr = addr;
147 last_symbol_section = symbol_section;
148 return bfd_reloc_ok;
149 }
150 if (last_addr != addr)
151 abort ();
152 last_addr = 0;
153
154 if (! symbol_section || last_symbol_section != symbol_section || end < start)
155 return bfd_reloc_outofrange;
156
157 /* Get the symbol_section contents. */
158 if (symbol_section != input_section)
159 {
160 if (elf_section_data (symbol_section)->this_hdr.contents != NULL)
161 contents = elf_section_data (symbol_section)->this_hdr.contents;
162 else
163 {
164 if (!bfd_malloc_and_get_section (input_bfd, symbol_section,
165 &contents))
166 {
167 if (contents != NULL)
168 free (contents);
169 return bfd_reloc_outofrange;
170 }
171 }
172 }
173 #define IS_PPI(PTR) ((bfd_get_16 (input_bfd, (PTR)) & 0xfc00) == 0xf800)
174 start_ptr = contents + start;
175 for (cum_diff = -6, ptr = contents + end; cum_diff < 0 && ptr > start_ptr;)
176 {
177 for (last_ptr = ptr, ptr -= 4; ptr >= start_ptr && IS_PPI (ptr);)
178 ptr -= 2;
179 ptr += 2;
180 diff = (last_ptr - ptr) >> 1;
181 cum_diff += diff & 1;
182 cum_diff += diff;
183 }
184 /* Calculate the start / end values to load into rs / re minus four -
185 so that will cancel out the four we would otherwise have to add to
186 addr to get the value to subtract in order to get relative addressing. */
187 if (cum_diff >= 0)
188 {
189 start -= 4;
190 end = (ptr + cum_diff * 2) - contents;
191 }
192 else
193 {
194 bfd_vma start0 = start - 4;
195
196 while (start0 && IS_PPI (contents + start0))
197 start0 -= 2;
198 start0 = start - 2 - ((start - start0) & 2);
199 start = start0 - cum_diff - 2;
200 end = start0;
201 }
202
203 if (contents != NULL
204 && elf_section_data (symbol_section)->this_hdr.contents != contents)
205 free (contents);
206
207 insn = bfd_get_16 (input_bfd, contents + addr);
208
209 x = (insn & 0x200 ? end : start) - addr;
210 if (input_section != symbol_section)
211 x += ((symbol_section->output_section->vma + symbol_section->output_offset)
212 - (input_section->output_section->vma
213 + input_section->output_offset));
214 x >>= 1;
215 if (x < -128 || x > 127)
216 return bfd_reloc_overflow;
217
218 x = (insn & ~0xff) | (x & 0xff);
219 bfd_put_16 (input_bfd, (bfd_vma) x, contents + addr);
220
221 return bfd_reloc_ok;
222 }
223
224 /* This function is used for normal relocs. This used to be like the COFF
225 function, and is almost certainly incorrect for other ELF targets. */
226
227 static bfd_reloc_status_type
228 sh_elf_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol_in,
229 void *data, asection *input_section, bfd *output_bfd,
230 char **error_message ATTRIBUTE_UNUSED)
231 {
232 unsigned long insn;
233 bfd_vma sym_value;
234 enum elf_sh_reloc_type r_type;
235 bfd_vma addr = reloc_entry->address;
236 bfd_byte *hit_data = addr + (bfd_byte *) data;
237
238 r_type = (enum elf_sh_reloc_type) reloc_entry->howto->type;
239
240 if (output_bfd != NULL)
241 {
242 /* Partial linking--do nothing. */
243 reloc_entry->address += input_section->output_offset;
244 return bfd_reloc_ok;
245 }
246
247 /* Almost all relocs have to do with relaxing. If any work must be
248 done for them, it has been done in sh_relax_section. */
249 if (r_type == R_SH_IND12W && (symbol_in->flags & BSF_LOCAL) != 0)
250 return bfd_reloc_ok;
251
252 if (symbol_in != NULL
253 && bfd_is_und_section (symbol_in->section))
254 return bfd_reloc_undefined;
255
256 /* PR 17512: file: 9891ca98. */
257 if (addr * bfd_octets_per_byte (abfd) + bfd_get_reloc_size (reloc_entry->howto)
258 > bfd_get_section_limit_octets (abfd, input_section))
259 return bfd_reloc_outofrange;
260
261 if (bfd_is_com_section (symbol_in->section))
262 sym_value = 0;
263 else
264 sym_value = (symbol_in->value +
265 symbol_in->section->output_section->vma +
266 symbol_in->section->output_offset);
267
268 switch (r_type)
269 {
270 case R_SH_DIR32:
271 insn = bfd_get_32 (abfd, hit_data);
272 insn += sym_value + reloc_entry->addend;
273 bfd_put_32 (abfd, (bfd_vma) insn, hit_data);
274 break;
275 case R_SH_IND12W:
276 insn = bfd_get_16 (abfd, hit_data);
277 sym_value += reloc_entry->addend;
278 sym_value -= (input_section->output_section->vma
279 + input_section->output_offset
280 + addr
281 + 4);
282 sym_value += (insn & 0xfff) << 1;
283 if (insn & 0x800)
284 sym_value -= 0x1000;
285 insn = (insn & 0xf000) | (sym_value & 0xfff);
286 bfd_put_16 (abfd, (bfd_vma) insn, hit_data);
287 if (sym_value < (bfd_vma) -0x1000 || sym_value >= 0x1000)
288 return bfd_reloc_overflow;
289 break;
290 default:
291 abort ();
292 break;
293 }
294
295 return bfd_reloc_ok;
296 }
297
298 /* This function is used for relocs which are only used for relaxing,
299 which the linker should otherwise ignore. */
300
301 static bfd_reloc_status_type
302 sh_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
303 asymbol *symbol ATTRIBUTE_UNUSED,
304 void *data ATTRIBUTE_UNUSED, asection *input_section,
305 bfd *output_bfd,
306 char **error_message ATTRIBUTE_UNUSED)
307 {
308 if (output_bfd != NULL)
309 reloc_entry->address += input_section->output_offset;
310 return bfd_reloc_ok;
311 }
312
313 /* This structure is used to map BFD reloc codes to SH ELF relocs. */
314
315 struct elf_reloc_map
316 {
317 bfd_reloc_code_real_type bfd_reloc_val;
318 unsigned char elf_reloc_val;
319 };
320
321 /* An array mapping BFD reloc codes to SH ELF relocs. */
322
323 static const struct elf_reloc_map sh_reloc_map[] =
324 {
325 { BFD_RELOC_NONE, R_SH_NONE },
326 { BFD_RELOC_32, R_SH_DIR32 },
327 { BFD_RELOC_16, R_SH_DIR16 },
328 { BFD_RELOC_8, R_SH_DIR8 },
329 { BFD_RELOC_CTOR, R_SH_DIR32 },
330 { BFD_RELOC_32_PCREL, R_SH_REL32 },
331 { BFD_RELOC_SH_PCDISP8BY2, R_SH_DIR8WPN },
332 { BFD_RELOC_SH_PCDISP12BY2, R_SH_IND12W },
333 { BFD_RELOC_SH_PCRELIMM8BY2, R_SH_DIR8WPZ },
334 { BFD_RELOC_SH_PCRELIMM8BY4, R_SH_DIR8WPL },
335 { BFD_RELOC_8_PCREL, R_SH_SWITCH8 },
336 { BFD_RELOC_SH_SWITCH16, R_SH_SWITCH16 },
337 { BFD_RELOC_SH_SWITCH32, R_SH_SWITCH32 },
338 { BFD_RELOC_SH_USES, R_SH_USES },
339 { BFD_RELOC_SH_COUNT, R_SH_COUNT },
340 { BFD_RELOC_SH_ALIGN, R_SH_ALIGN },
341 { BFD_RELOC_SH_CODE, R_SH_CODE },
342 { BFD_RELOC_SH_DATA, R_SH_DATA },
343 { BFD_RELOC_SH_LABEL, R_SH_LABEL },
344 { BFD_RELOC_VTABLE_INHERIT, R_SH_GNU_VTINHERIT },
345 { BFD_RELOC_VTABLE_ENTRY, R_SH_GNU_VTENTRY },
346 { BFD_RELOC_SH_LOOP_START, R_SH_LOOP_START },
347 { BFD_RELOC_SH_LOOP_END, R_SH_LOOP_END },
348 { BFD_RELOC_SH_TLS_GD_32, R_SH_TLS_GD_32 },
349 { BFD_RELOC_SH_TLS_LD_32, R_SH_TLS_LD_32 },
350 { BFD_RELOC_SH_TLS_LDO_32, R_SH_TLS_LDO_32 },
351 { BFD_RELOC_SH_TLS_IE_32, R_SH_TLS_IE_32 },
352 { BFD_RELOC_SH_TLS_LE_32, R_SH_TLS_LE_32 },
353 { BFD_RELOC_SH_TLS_DTPMOD32, R_SH_TLS_DTPMOD32 },
354 { BFD_RELOC_SH_TLS_DTPOFF32, R_SH_TLS_DTPOFF32 },
355 { BFD_RELOC_SH_TLS_TPOFF32, R_SH_TLS_TPOFF32 },
356 { BFD_RELOC_32_GOT_PCREL, R_SH_GOT32 },
357 { BFD_RELOC_32_PLT_PCREL, R_SH_PLT32 },
358 { BFD_RELOC_SH_COPY, R_SH_COPY },
359 { BFD_RELOC_SH_GLOB_DAT, R_SH_GLOB_DAT },
360 { BFD_RELOC_SH_JMP_SLOT, R_SH_JMP_SLOT },
361 { BFD_RELOC_SH_RELATIVE, R_SH_RELATIVE },
362 { BFD_RELOC_32_GOTOFF, R_SH_GOTOFF },
363 { BFD_RELOC_SH_GOTPC, R_SH_GOTPC },
364 { BFD_RELOC_SH_GOTPLT32, R_SH_GOTPLT32 },
365 { BFD_RELOC_SH_GOT20, R_SH_GOT20 },
366 { BFD_RELOC_SH_GOTOFF20, R_SH_GOTOFF20 },
367 { BFD_RELOC_SH_GOTFUNCDESC, R_SH_GOTFUNCDESC },
368 { BFD_RELOC_SH_GOTFUNCDESC20, R_SH_GOTFUNCDESC20 },
369 { BFD_RELOC_SH_GOTOFFFUNCDESC, R_SH_GOTOFFFUNCDESC },
370 { BFD_RELOC_SH_GOTOFFFUNCDESC20, R_SH_GOTOFFFUNCDESC20 },
371 { BFD_RELOC_SH_FUNCDESC, R_SH_FUNCDESC },
372 };
373
374 /* Given a BFD reloc code, return the howto structure for the
375 corresponding SH ELF reloc. */
376
377 static reloc_howto_type *
378 sh_elf_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code)
379 {
380 unsigned int i;
381
382 for (i = 0; i < sizeof (sh_reloc_map) / sizeof (struct elf_reloc_map); i++)
383 {
384 if (sh_reloc_map[i].bfd_reloc_val == code)
385 return get_howto_table (abfd) + (int) sh_reloc_map[i].elf_reloc_val;
386 }
387
388 return NULL;
389 }
390
391 static reloc_howto_type *
392 sh_elf_reloc_name_lookup (bfd *abfd, const char *r_name)
393 {
394 unsigned int i;
395
396 if (vxworks_object_p (abfd))
397 {
398 for (i = 0;
399 i < (sizeof (sh_vxworks_howto_table)
400 / sizeof (sh_vxworks_howto_table[0]));
401 i++)
402 if (sh_vxworks_howto_table[i].name != NULL
403 && strcasecmp (sh_vxworks_howto_table[i].name, r_name) == 0)
404 return &sh_vxworks_howto_table[i];
405 }
406 else
407 {
408 for (i = 0;
409 i < (sizeof (sh_elf_howto_table)
410 / sizeof (sh_elf_howto_table[0]));
411 i++)
412 if (sh_elf_howto_table[i].name != NULL
413 && strcasecmp (sh_elf_howto_table[i].name, r_name) == 0)
414 return &sh_elf_howto_table[i];
415 }
416
417 return NULL;
418 }
419
420 /* Given an ELF reloc, fill in the howto field of a relent. */
421
422 static bfd_boolean
423 sh_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
424 {
425 unsigned int r;
426
427 r = ELF32_R_TYPE (dst->r_info);
428
429 if (r >= R_SH_max
430 || (r >= R_SH_FIRST_INVALID_RELOC && r <= R_SH_LAST_INVALID_RELOC)
431 || (r >= R_SH_FIRST_INVALID_RELOC_2 && r <= R_SH_LAST_INVALID_RELOC_2)
432 || (r >= R_SH_FIRST_INVALID_RELOC_3 && r <= R_SH_LAST_INVALID_RELOC_3)
433 || (r >= R_SH_FIRST_INVALID_RELOC_4 && r <= R_SH_LAST_INVALID_RELOC_4)
434 || (r >= R_SH_FIRST_INVALID_RELOC_5 && r <= R_SH_LAST_INVALID_RELOC_5)
435 || (r >= R_SH_FIRST_INVALID_RELOC_6 && r <= R_SH_LAST_INVALID_RELOC_6))
436 {
437 /* xgettext:c-format */
438 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
439 abfd, r);
440 bfd_set_error (bfd_error_bad_value);
441 return FALSE;
442 }
443
444 cache_ptr->howto = get_howto_table (abfd) + r;
445 return TRUE;
446 }
447 \f
448 /* This function handles relaxing for SH ELF. See the corresponding
449 function in coff-sh.c for a description of what this does. FIXME:
450 There is a lot of duplication here between this code and the COFF
451 specific code. The format of relocs and symbols is wound deeply
452 into this code, but it would still be better if the duplication
453 could be eliminated somehow. Note in particular that although both
454 functions use symbols like R_SH_CODE, those symbols have different
455 values; in coff-sh.c they come from include/coff/sh.h, whereas here
456 they come from enum elf_sh_reloc_type in include/elf/sh.h. */
457
458 static bfd_boolean
459 sh_elf_relax_section (bfd *abfd, asection *sec,
460 struct bfd_link_info *link_info, bfd_boolean *again)
461 {
462 Elf_Internal_Shdr *symtab_hdr;
463 Elf_Internal_Rela *internal_relocs;
464 bfd_boolean have_code;
465 Elf_Internal_Rela *irel, *irelend;
466 bfd_byte *contents = NULL;
467 Elf_Internal_Sym *isymbuf = NULL;
468
469 *again = FALSE;
470
471 if (bfd_link_relocatable (link_info)
472 || (sec->flags & SEC_RELOC) == 0
473 || sec->reloc_count == 0)
474 return TRUE;
475
476 symtab_hdr = &elf_symtab_hdr (abfd);
477
478 internal_relocs = (_bfd_elf_link_read_relocs
479 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
480 link_info->keep_memory));
481 if (internal_relocs == NULL)
482 goto error_return;
483
484 have_code = FALSE;
485
486 irelend = internal_relocs + sec->reloc_count;
487 for (irel = internal_relocs; irel < irelend; irel++)
488 {
489 bfd_vma laddr, paddr, symval;
490 unsigned short insn;
491 Elf_Internal_Rela *irelfn, *irelscan, *irelcount;
492 bfd_signed_vma foff;
493
494 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_CODE)
495 have_code = TRUE;
496
497 if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_USES)
498 continue;
499
500 /* Get the section contents. */
501 if (contents == NULL)
502 {
503 if (elf_section_data (sec)->this_hdr.contents != NULL)
504 contents = elf_section_data (sec)->this_hdr.contents;
505 else
506 {
507 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
508 goto error_return;
509 }
510 }
511
512 /* The r_addend field of the R_SH_USES reloc will point us to
513 the register load. The 4 is because the r_addend field is
514 computed as though it were a jump offset, which are based
515 from 4 bytes after the jump instruction. */
516 laddr = irel->r_offset + 4 + irel->r_addend;
517 if (laddr >= sec->size)
518 {
519 /* xgettext:c-format */
520 _bfd_error_handler
521 (_("%pB: %#" PRIx64 ": warning: bad R_SH_USES offset"),
522 abfd, (uint64_t) irel->r_offset);
523 continue;
524 }
525 insn = bfd_get_16 (abfd, contents + laddr);
526
527 /* If the instruction is not mov.l NN,rN, we don't know what to
528 do. */
529 if ((insn & 0xf000) != 0xd000)
530 {
531 _bfd_error_handler
532 /* xgettext:c-format */
533 (_("%pB: %#" PRIx64 ": warning: "
534 "R_SH_USES points to unrecognized insn 0x%x"),
535 abfd, (uint64_t) irel->r_offset, insn);
536 continue;
537 }
538
539 /* Get the address from which the register is being loaded. The
540 displacement in the mov.l instruction is quadrupled. It is a
541 displacement from four bytes after the movl instruction, but,
542 before adding in the PC address, two least significant bits
543 of the PC are cleared. We assume that the section is aligned
544 on a four byte boundary. */
545 paddr = insn & 0xff;
546 paddr *= 4;
547 paddr += (laddr + 4) &~ (bfd_vma) 3;
548 if (paddr >= sec->size)
549 {
550 _bfd_error_handler
551 /* xgettext:c-format */
552 (_("%pB: %#" PRIx64 ": warning: bad R_SH_USES load offset"),
553 abfd, (uint64_t) irel->r_offset);
554 continue;
555 }
556
557 /* Get the reloc for the address from which the register is
558 being loaded. This reloc will tell us which function is
559 actually being called. */
560 for (irelfn = internal_relocs; irelfn < irelend; irelfn++)
561 if (irelfn->r_offset == paddr
562 && ELF32_R_TYPE (irelfn->r_info) == (int) R_SH_DIR32)
563 break;
564 if (irelfn >= irelend)
565 {
566 _bfd_error_handler
567 /* xgettext:c-format */
568 (_("%pB: %#" PRIx64 ": warning: could not find expected reloc"),
569 abfd, (uint64_t) paddr);
570 continue;
571 }
572
573 /* Read this BFD's symbols if we haven't done so already. */
574 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
575 {
576 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
577 if (isymbuf == NULL)
578 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
579 symtab_hdr->sh_info, 0,
580 NULL, NULL, NULL);
581 if (isymbuf == NULL)
582 goto error_return;
583 }
584
585 /* Get the value of the symbol referred to by the reloc. */
586 if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info)
587 {
588 /* A local symbol. */
589 Elf_Internal_Sym *isym;
590
591 isym = isymbuf + ELF32_R_SYM (irelfn->r_info);
592 if (isym->st_shndx
593 != (unsigned int) _bfd_elf_section_from_bfd_section (abfd, sec))
594 {
595 _bfd_error_handler
596 /* xgettext:c-format */
597 (_("%pB: %#" PRIx64 ": warning: symbol in unexpected section"),
598 abfd, (uint64_t) paddr);
599 continue;
600 }
601
602 symval = (isym->st_value
603 + sec->output_section->vma
604 + sec->output_offset);
605 }
606 else
607 {
608 unsigned long indx;
609 struct elf_link_hash_entry *h;
610
611 indx = ELF32_R_SYM (irelfn->r_info) - symtab_hdr->sh_info;
612 h = elf_sym_hashes (abfd)[indx];
613 BFD_ASSERT (h != NULL);
614 if (h->root.type != bfd_link_hash_defined
615 && h->root.type != bfd_link_hash_defweak)
616 {
617 /* This appears to be a reference to an undefined
618 symbol. Just ignore it--it will be caught by the
619 regular reloc processing. */
620 continue;
621 }
622
623 symval = (h->root.u.def.value
624 + h->root.u.def.section->output_section->vma
625 + h->root.u.def.section->output_offset);
626 }
627
628 if (get_howto_table (abfd)[R_SH_DIR32].partial_inplace)
629 symval += bfd_get_32 (abfd, contents + paddr);
630 else
631 symval += irelfn->r_addend;
632
633 /* See if this function call can be shortened. */
634 foff = (symval
635 - (irel->r_offset
636 + sec->output_section->vma
637 + sec->output_offset
638 + 4));
639 /* A branch to an address beyond ours might be increased by an
640 .align that doesn't move when bytes behind us are deleted.
641 So, we add some slop in this calculation to allow for
642 that. */
643 if (foff < -0x1000 || foff >= 0x1000 - 8)
644 {
645 /* After all that work, we can't shorten this function call. */
646 continue;
647 }
648
649 /* Shorten the function call. */
650
651 /* For simplicity of coding, we are going to modify the section
652 contents, the section relocs, and the BFD symbol table. We
653 must tell the rest of the code not to free up this
654 information. It would be possible to instead create a table
655 of changes which have to be made, as is done in coff-mips.c;
656 that would be more work, but would require less memory when
657 the linker is run. */
658
659 elf_section_data (sec)->relocs = internal_relocs;
660 elf_section_data (sec)->this_hdr.contents = contents;
661 symtab_hdr->contents = (unsigned char *) isymbuf;
662
663 /* Replace the jmp/jsr with a bra/bsr. */
664
665 /* Change the R_SH_USES reloc into an R_SH_IND12W reloc, and
666 replace the jmp/jsr with a bra/bsr. */
667 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irelfn->r_info), R_SH_IND12W);
668 /* We used to test (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info)
669 here, but that only checks if the symbol is an external symbol,
670 not if the symbol is in a different section. Besides, we need
671 a consistent meaning for the relocation, so we just assume here that
672 the value of the symbol is not available. */
673
674 /* We can't fully resolve this yet, because the external
675 symbol value may be changed by future relaxing. We let
676 the final link phase handle it. */
677 if (bfd_get_16 (abfd, contents + irel->r_offset) & 0x0020)
678 bfd_put_16 (abfd, (bfd_vma) 0xa000, contents + irel->r_offset);
679 else
680 bfd_put_16 (abfd, (bfd_vma) 0xb000, contents + irel->r_offset);
681
682 irel->r_addend = -4;
683
684 /* When we calculated the symbol "value" we had an offset in the
685 DIR32's word in memory (we read and add it above). However,
686 the jsr we create does NOT have this offset encoded, so we
687 have to add it to the addend to preserve it. */
688 irel->r_addend += bfd_get_32 (abfd, contents + paddr);
689
690 /* See if there is another R_SH_USES reloc referring to the same
691 register load. */
692 for (irelscan = internal_relocs; irelscan < irelend; irelscan++)
693 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_USES
694 && laddr == irelscan->r_offset + 4 + irelscan->r_addend)
695 break;
696 if (irelscan < irelend)
697 {
698 /* Some other function call depends upon this register load,
699 and we have not yet converted that function call.
700 Indeed, we may never be able to convert it. There is
701 nothing else we can do at this point. */
702 continue;
703 }
704
705 /* Look for a R_SH_COUNT reloc on the location where the
706 function address is stored. Do this before deleting any
707 bytes, to avoid confusion about the address. */
708 for (irelcount = internal_relocs; irelcount < irelend; irelcount++)
709 if (irelcount->r_offset == paddr
710 && ELF32_R_TYPE (irelcount->r_info) == (int) R_SH_COUNT)
711 break;
712
713 /* Delete the register load. */
714 if (! sh_elf_relax_delete_bytes (abfd, sec, laddr, 2))
715 goto error_return;
716
717 /* That will change things, so, just in case it permits some
718 other function call to come within range, we should relax
719 again. Note that this is not required, and it may be slow. */
720 *again = TRUE;
721
722 /* Now check whether we got a COUNT reloc. */
723 if (irelcount >= irelend)
724 {
725 _bfd_error_handler
726 /* xgettext:c-format */
727 (_("%pB: %#" PRIx64 ": warning: "
728 "could not find expected COUNT reloc"),
729 abfd, (uint64_t) paddr);
730 continue;
731 }
732
733 /* The number of uses is stored in the r_addend field. We've
734 just deleted one. */
735 if (irelcount->r_addend == 0)
736 {
737 /* xgettext:c-format */
738 _bfd_error_handler (_("%pB: %#" PRIx64 ": warning: bad count"),
739 abfd, (uint64_t) paddr);
740 continue;
741 }
742
743 --irelcount->r_addend;
744
745 /* If there are no more uses, we can delete the address. Reload
746 the address from irelfn, in case it was changed by the
747 previous call to sh_elf_relax_delete_bytes. */
748 if (irelcount->r_addend == 0)
749 {
750 if (! sh_elf_relax_delete_bytes (abfd, sec, irelfn->r_offset, 4))
751 goto error_return;
752 }
753
754 /* We've done all we can with that function call. */
755 }
756
757 /* Look for load and store instructions that we can align on four
758 byte boundaries. */
759 if ((elf_elfheader (abfd)->e_flags & EF_SH_MACH_MASK) != EF_SH4
760 && have_code)
761 {
762 bfd_boolean swapped;
763
764 /* Get the section contents. */
765 if (contents == NULL)
766 {
767 if (elf_section_data (sec)->this_hdr.contents != NULL)
768 contents = elf_section_data (sec)->this_hdr.contents;
769 else
770 {
771 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
772 goto error_return;
773 }
774 }
775
776 if (! sh_elf_align_loads (abfd, sec, internal_relocs, contents,
777 &swapped))
778 goto error_return;
779
780 if (swapped)
781 {
782 elf_section_data (sec)->relocs = internal_relocs;
783 elf_section_data (sec)->this_hdr.contents = contents;
784 symtab_hdr->contents = (unsigned char *) isymbuf;
785 }
786 }
787
788 if (isymbuf != NULL
789 && symtab_hdr->contents != (unsigned char *) isymbuf)
790 {
791 if (! link_info->keep_memory)
792 free (isymbuf);
793 else
794 {
795 /* Cache the symbols for elf_link_input_bfd. */
796 symtab_hdr->contents = (unsigned char *) isymbuf;
797 }
798 }
799
800 if (contents != NULL
801 && elf_section_data (sec)->this_hdr.contents != contents)
802 {
803 if (! link_info->keep_memory)
804 free (contents);
805 else
806 {
807 /* Cache the section contents for elf_link_input_bfd. */
808 elf_section_data (sec)->this_hdr.contents = contents;
809 }
810 }
811
812 if (internal_relocs != NULL
813 && elf_section_data (sec)->relocs != internal_relocs)
814 free (internal_relocs);
815
816 return TRUE;
817
818 error_return:
819 if (isymbuf != NULL
820 && symtab_hdr->contents != (unsigned char *) isymbuf)
821 free (isymbuf);
822 if (contents != NULL
823 && elf_section_data (sec)->this_hdr.contents != contents)
824 free (contents);
825 if (internal_relocs != NULL
826 && elf_section_data (sec)->relocs != internal_relocs)
827 free (internal_relocs);
828
829 return FALSE;
830 }
831
832 /* Delete some bytes from a section while relaxing. FIXME: There is a
833 lot of duplication between this function and sh_relax_delete_bytes
834 in coff-sh.c. */
835
836 static bfd_boolean
837 sh_elf_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr,
838 int count)
839 {
840 Elf_Internal_Shdr *symtab_hdr;
841 unsigned int sec_shndx;
842 bfd_byte *contents;
843 Elf_Internal_Rela *irel, *irelend;
844 Elf_Internal_Rela *irelalign;
845 bfd_vma toaddr;
846 Elf_Internal_Sym *isymbuf, *isym, *isymend;
847 struct elf_link_hash_entry **sym_hashes;
848 struct elf_link_hash_entry **end_hashes;
849 unsigned int symcount;
850 asection *o;
851
852 symtab_hdr = &elf_symtab_hdr (abfd);
853 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
854
855 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
856
857 contents = elf_section_data (sec)->this_hdr.contents;
858
859 /* The deletion must stop at the next ALIGN reloc for an alignment
860 power larger than the number of bytes we are deleting. */
861
862 irelalign = NULL;
863 toaddr = sec->size;
864
865 irel = elf_section_data (sec)->relocs;
866 irelend = irel + sec->reloc_count;
867 for (; irel < irelend; irel++)
868 {
869 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN
870 && irel->r_offset > addr
871 && count < (1 << irel->r_addend))
872 {
873 irelalign = irel;
874 toaddr = irel->r_offset;
875 break;
876 }
877 }
878
879 /* Actually delete the bytes. */
880 memmove (contents + addr, contents + addr + count,
881 (size_t) (toaddr - addr - count));
882 if (irelalign == NULL)
883 sec->size -= count;
884 else
885 {
886 int i;
887
888 #define NOP_OPCODE (0x0009)
889
890 BFD_ASSERT ((count & 1) == 0);
891 for (i = 0; i < count; i += 2)
892 bfd_put_16 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i);
893 }
894
895 /* Adjust all the relocs. */
896 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
897 {
898 bfd_vma nraddr, stop;
899 bfd_vma start = 0;
900 int insn = 0;
901 int off, adjust, oinsn;
902 bfd_signed_vma voff = 0;
903 bfd_boolean overflow;
904
905 /* Get the new reloc address. */
906 nraddr = irel->r_offset;
907 if ((irel->r_offset > addr
908 && irel->r_offset < toaddr)
909 || (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN
910 && irel->r_offset == toaddr))
911 nraddr -= count;
912
913 /* See if this reloc was for the bytes we have deleted, in which
914 case we no longer care about it. Don't delete relocs which
915 represent addresses, though. */
916 if (irel->r_offset >= addr
917 && irel->r_offset < addr + count
918 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_ALIGN
919 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE
920 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_DATA
921 && ELF32_R_TYPE (irel->r_info) != (int) R_SH_LABEL)
922 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
923 (int) R_SH_NONE);
924
925 /* If this is a PC relative reloc, see if the range it covers
926 includes the bytes we have deleted. */
927 switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
928 {
929 default:
930 break;
931
932 case R_SH_DIR8WPN:
933 case R_SH_IND12W:
934 case R_SH_DIR8WPZ:
935 case R_SH_DIR8WPL:
936 start = irel->r_offset;
937 insn = bfd_get_16 (abfd, contents + nraddr);
938 break;
939 }
940
941 switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
942 {
943 default:
944 start = stop = addr;
945 break;
946
947 case R_SH_DIR32:
948 /* If this reloc is against a symbol defined in this
949 section, and the symbol will not be adjusted below, we
950 must check the addend to see it will put the value in
951 range to be adjusted, and hence must be changed. */
952 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
953 {
954 isym = isymbuf + ELF32_R_SYM (irel->r_info);
955 if (isym->st_shndx == sec_shndx
956 && (isym->st_value <= addr
957 || isym->st_value >= toaddr))
958 {
959 bfd_vma val;
960
961 if (get_howto_table (abfd)[R_SH_DIR32].partial_inplace)
962 {
963 val = bfd_get_32 (abfd, contents + nraddr);
964 val += isym->st_value;
965 if (val > addr && val < toaddr)
966 bfd_put_32 (abfd, val - count, contents + nraddr);
967 }
968 else
969 {
970 val = isym->st_value + irel->r_addend;
971 if (val > addr && val < toaddr)
972 irel->r_addend -= count;
973 }
974 }
975 }
976 start = stop = addr;
977 break;
978
979 case R_SH_DIR8WPN:
980 off = insn & 0xff;
981 if (off & 0x80)
982 off -= 0x100;
983 stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
984 break;
985
986 case R_SH_IND12W:
987 off = insn & 0xfff;
988 if (! off)
989 {
990 /* This has been made by previous relaxation. Since the
991 relocation will be against an external symbol, the
992 final relocation will just do the right thing. */
993 start = stop = addr;
994 }
995 else
996 {
997 if (off & 0x800)
998 off -= 0x1000;
999 stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
1000
1001 /* The addend will be against the section symbol, thus
1002 for adjusting the addend, the relevant start is the
1003 start of the section.
1004 N.B. If we want to abandon in-place changes here and
1005 test directly using symbol + addend, we have to take into
1006 account that the addend has already been adjusted by -4. */
1007 if (stop > addr && stop < toaddr)
1008 irel->r_addend -= count;
1009 }
1010 break;
1011
1012 case R_SH_DIR8WPZ:
1013 off = insn & 0xff;
1014 stop = start + 4 + off * 2;
1015 break;
1016
1017 case R_SH_DIR8WPL:
1018 off = insn & 0xff;
1019 stop = (start & ~(bfd_vma) 3) + 4 + off * 4;
1020 break;
1021
1022 case R_SH_SWITCH8:
1023 case R_SH_SWITCH16:
1024 case R_SH_SWITCH32:
1025 /* These relocs types represent
1026 .word L2-L1
1027 The r_addend field holds the difference between the reloc
1028 address and L1. That is the start of the reloc, and
1029 adding in the contents gives us the top. We must adjust
1030 both the r_offset field and the section contents.
1031 N.B. in gas / coff bfd, the elf bfd r_addend is called r_offset,
1032 and the elf bfd r_offset is called r_vaddr. */
1033
1034 stop = irel->r_offset;
1035 start = (bfd_vma) ((bfd_signed_vma) stop - (long) irel->r_addend);
1036
1037 if (start > addr
1038 && start < toaddr
1039 && (stop <= addr || stop >= toaddr))
1040 irel->r_addend += count;
1041 else if (stop > addr
1042 && stop < toaddr
1043 && (start <= addr || start >= toaddr))
1044 irel->r_addend -= count;
1045
1046 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH16)
1047 voff = bfd_get_signed_16 (abfd, contents + nraddr);
1048 else if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH8)
1049 voff = bfd_get_8 (abfd, contents + nraddr);
1050 else
1051 voff = bfd_get_signed_32 (abfd, contents + nraddr);
1052 stop = (bfd_vma) ((bfd_signed_vma) start + voff);
1053
1054 break;
1055
1056 case R_SH_USES:
1057 start = irel->r_offset;
1058 stop = (bfd_vma) ((bfd_signed_vma) start
1059 + (long) irel->r_addend
1060 + 4);
1061 break;
1062 }
1063
1064 if (start > addr
1065 && start < toaddr
1066 && (stop <= addr || stop >= toaddr))
1067 adjust = count;
1068 else if (stop > addr
1069 && stop < toaddr
1070 && (start <= addr || start >= toaddr))
1071 adjust = - count;
1072 else
1073 adjust = 0;
1074
1075 if (adjust != 0)
1076 {
1077 oinsn = insn;
1078 overflow = FALSE;
1079 switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
1080 {
1081 default:
1082 abort ();
1083 break;
1084
1085 case R_SH_DIR8WPN:
1086 case R_SH_DIR8WPZ:
1087 insn += adjust / 2;
1088 if ((oinsn & 0xff00) != (insn & 0xff00))
1089 overflow = TRUE;
1090 bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
1091 break;
1092
1093 case R_SH_IND12W:
1094 insn += adjust / 2;
1095 if ((oinsn & 0xf000) != (insn & 0xf000))
1096 overflow = TRUE;
1097 bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
1098 break;
1099
1100 case R_SH_DIR8WPL:
1101 BFD_ASSERT (adjust == count || count >= 4);
1102 if (count >= 4)
1103 insn += adjust / 4;
1104 else
1105 {
1106 if ((irel->r_offset & 3) == 0)
1107 ++insn;
1108 }
1109 if ((oinsn & 0xff00) != (insn & 0xff00))
1110 overflow = TRUE;
1111 bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
1112 break;
1113
1114 case R_SH_SWITCH8:
1115 voff += adjust;
1116 if (voff < 0 || voff >= 0xff)
1117 overflow = TRUE;
1118 bfd_put_8 (abfd, voff, contents + nraddr);
1119 break;
1120
1121 case R_SH_SWITCH16:
1122 voff += adjust;
1123 if (voff < - 0x8000 || voff >= 0x8000)
1124 overflow = TRUE;
1125 bfd_put_signed_16 (abfd, (bfd_vma) voff, contents + nraddr);
1126 break;
1127
1128 case R_SH_SWITCH32:
1129 voff += adjust;
1130 bfd_put_signed_32 (abfd, (bfd_vma) voff, contents + nraddr);
1131 break;
1132
1133 case R_SH_USES:
1134 irel->r_addend += adjust;
1135 break;
1136 }
1137
1138 if (overflow)
1139 {
1140 _bfd_error_handler
1141 /* xgettext:c-format */
1142 (_("%pB: %#" PRIx64 ": fatal: reloc overflow while relaxing"),
1143 abfd, (uint64_t) irel->r_offset);
1144 bfd_set_error (bfd_error_bad_value);
1145 return FALSE;
1146 }
1147 }
1148
1149 irel->r_offset = nraddr;
1150 }
1151
1152 /* Look through all the other sections. If there contain any IMM32
1153 relocs against internal symbols which we are not going to adjust
1154 below, we may need to adjust the addends. */
1155 for (o = abfd->sections; o != NULL; o = o->next)
1156 {
1157 Elf_Internal_Rela *internal_relocs;
1158 Elf_Internal_Rela *irelscan, *irelscanend;
1159 bfd_byte *ocontents;
1160
1161 if (o == sec
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 if (ocontents != NULL)
1197 free (ocontents);
1198 return FALSE;
1199 }
1200
1201 elf_section_data (o)->this_hdr.contents = ocontents;
1202 }
1203 }
1204
1205 stop = irelscan->r_offset;
1206 start
1207 = (bfd_vma) ((bfd_signed_vma) stop - (long) irelscan->r_addend);
1208
1209 /* STOP is in a different section, so it won't change. */
1210 if (start > addr && start < toaddr)
1211 irelscan->r_addend += count;
1212
1213 voff = bfd_get_signed_32 (abfd, ocontents + irelscan->r_offset);
1214 stop = (bfd_vma) ((bfd_signed_vma) start + voff);
1215
1216 if (start > addr
1217 && start < toaddr
1218 && (stop <= addr || stop >= toaddr))
1219 bfd_put_signed_32 (abfd, (bfd_vma) voff + count,
1220 ocontents + irelscan->r_offset);
1221 else if (stop > addr
1222 && stop < toaddr
1223 && (start <= addr || start >= toaddr))
1224 bfd_put_signed_32 (abfd, (bfd_vma) voff - count,
1225 ocontents + irelscan->r_offset);
1226 }
1227
1228 if (ELF32_R_TYPE (irelscan->r_info) != (int) R_SH_DIR32)
1229 continue;
1230
1231 if (ELF32_R_SYM (irelscan->r_info) >= symtab_hdr->sh_info)
1232 continue;
1233
1234
1235 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1236 if (isym->st_shndx == sec_shndx
1237 && (isym->st_value <= addr
1238 || isym->st_value >= toaddr))
1239 {
1240 bfd_vma val;
1241
1242 if (ocontents == NULL)
1243 {
1244 if (elf_section_data (o)->this_hdr.contents != NULL)
1245 ocontents = elf_section_data (o)->this_hdr.contents;
1246 else
1247 {
1248 /* We always cache the section contents.
1249 Perhaps, if info->keep_memory is FALSE, we
1250 should free them, if we are permitted to,
1251 when we leave sh_coff_relax_section. */
1252 if (!bfd_malloc_and_get_section (abfd, o, &ocontents))
1253 {
1254 if (ocontents != NULL)
1255 free (ocontents);
1256 return FALSE;
1257 }
1258
1259 elf_section_data (o)->this_hdr.contents = ocontents;
1260 }
1261 }
1262
1263 val = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
1264 val += isym->st_value;
1265 if (val > addr && val < toaddr)
1266 bfd_put_32 (abfd, val - count,
1267 ocontents + irelscan->r_offset);
1268 }
1269 }
1270 }
1271
1272 /* Adjust the local symbols defined in this section. */
1273 isymend = isymbuf + symtab_hdr->sh_info;
1274 for (isym = isymbuf; isym < isymend; isym++)
1275 {
1276 if (isym->st_shndx == sec_shndx
1277 && isym->st_value > addr
1278 && isym->st_value < toaddr)
1279 isym->st_value -= count;
1280 }
1281
1282 /* Now adjust the global symbols defined in this section. */
1283 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1284 - symtab_hdr->sh_info);
1285 sym_hashes = elf_sym_hashes (abfd);
1286 end_hashes = sym_hashes + symcount;
1287 for (; sym_hashes < end_hashes; sym_hashes++)
1288 {
1289 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1290 if ((sym_hash->root.type == bfd_link_hash_defined
1291 || sym_hash->root.type == bfd_link_hash_defweak)
1292 && sym_hash->root.u.def.section == sec
1293 && sym_hash->root.u.def.value > addr
1294 && sym_hash->root.u.def.value < toaddr)
1295 {
1296 sym_hash->root.u.def.value -= count;
1297 }
1298 }
1299
1300 /* See if we can move the ALIGN reloc forward. We have adjusted
1301 r_offset for it already. */
1302 if (irelalign != NULL)
1303 {
1304 bfd_vma alignto, alignaddr;
1305
1306 alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend);
1307 alignaddr = BFD_ALIGN (irelalign->r_offset,
1308 1 << irelalign->r_addend);
1309 if (alignto != alignaddr)
1310 {
1311 /* Tail recursion. */
1312 return sh_elf_relax_delete_bytes (abfd, sec, alignaddr,
1313 (int) (alignto - alignaddr));
1314 }
1315 }
1316
1317 return TRUE;
1318 }
1319
1320 /* Look for loads and stores which we can align to four byte
1321 boundaries. This is like sh_align_loads in coff-sh.c. */
1322
1323 static bfd_boolean
1324 sh_elf_align_loads (bfd *abfd ATTRIBUTE_UNUSED, asection *sec,
1325 Elf_Internal_Rela *internal_relocs,
1326 bfd_byte *contents ATTRIBUTE_UNUSED,
1327 bfd_boolean *pswapped)
1328 {
1329 Elf_Internal_Rela *irel, *irelend;
1330 bfd_vma *labels = NULL;
1331 bfd_vma *label, *label_end;
1332 bfd_size_type amt;
1333
1334 *pswapped = FALSE;
1335
1336 irelend = internal_relocs + sec->reloc_count;
1337
1338 /* Get all the addresses with labels on them. */
1339 amt = sec->reloc_count;
1340 amt *= sizeof (bfd_vma);
1341 labels = (bfd_vma *) bfd_malloc (amt);
1342 if (labels == NULL)
1343 goto error_return;
1344 label_end = labels;
1345 for (irel = internal_relocs; irel < irelend; irel++)
1346 {
1347 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_LABEL)
1348 {
1349 *label_end = irel->r_offset;
1350 ++label_end;
1351 }
1352 }
1353
1354 /* Note that the assembler currently always outputs relocs in
1355 address order. If that ever changes, this code will need to sort
1356 the label values and the relocs. */
1357
1358 label = labels;
1359
1360 for (irel = internal_relocs; irel < irelend; irel++)
1361 {
1362 bfd_vma start, stop;
1363
1364 if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE)
1365 continue;
1366
1367 start = irel->r_offset;
1368
1369 for (irel++; irel < irelend; irel++)
1370 if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_DATA)
1371 break;
1372 if (irel < irelend)
1373 stop = irel->r_offset;
1374 else
1375 stop = sec->size;
1376
1377 if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_elf_swap_insns,
1378 internal_relocs, &label,
1379 label_end, start, stop, pswapped))
1380 goto error_return;
1381 }
1382
1383 free (labels);
1384
1385 return TRUE;
1386
1387 error_return:
1388 if (labels != NULL)
1389 free (labels);
1390 return FALSE;
1391 }
1392
1393 /* Swap two SH instructions. This is like sh_swap_insns in coff-sh.c. */
1394
1395 static bfd_boolean
1396 sh_elf_swap_insns (bfd *abfd, asection *sec, void *relocs,
1397 bfd_byte *contents, bfd_vma addr)
1398 {
1399 Elf_Internal_Rela *internal_relocs = (Elf_Internal_Rela *) relocs;
1400 unsigned short i1, i2;
1401 Elf_Internal_Rela *irel, *irelend;
1402
1403 /* Swap the instructions themselves. */
1404 i1 = bfd_get_16 (abfd, contents + addr);
1405 i2 = bfd_get_16 (abfd, contents + addr + 2);
1406 bfd_put_16 (abfd, (bfd_vma) i2, contents + addr);
1407 bfd_put_16 (abfd, (bfd_vma) i1, contents + addr + 2);
1408
1409 /* Adjust all reloc addresses. */
1410 irelend = internal_relocs + sec->reloc_count;
1411 for (irel = internal_relocs; irel < irelend; irel++)
1412 {
1413 enum elf_sh_reloc_type type;
1414 int add;
1415
1416 /* There are a few special types of relocs that we don't want to
1417 adjust. These relocs do not apply to the instruction itself,
1418 but are only associated with the address. */
1419 type = (enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info);
1420 if (type == R_SH_ALIGN
1421 || type == R_SH_CODE
1422 || type == R_SH_DATA
1423 || type == R_SH_LABEL)
1424 continue;
1425
1426 /* If an R_SH_USES reloc points to one of the addresses being
1427 swapped, we must adjust it. It would be incorrect to do this
1428 for a jump, though, since we want to execute both
1429 instructions after the jump. (We have avoided swapping
1430 around a label, so the jump will not wind up executing an
1431 instruction it shouldn't). */
1432 if (type == R_SH_USES)
1433 {
1434 bfd_vma off;
1435
1436 off = irel->r_offset + 4 + irel->r_addend;
1437 if (off == addr)
1438 irel->r_offset += 2;
1439 else if (off == addr + 2)
1440 irel->r_offset -= 2;
1441 }
1442
1443 if (irel->r_offset == addr)
1444 {
1445 irel->r_offset += 2;
1446 add = -2;
1447 }
1448 else if (irel->r_offset == addr + 2)
1449 {
1450 irel->r_offset -= 2;
1451 add = 2;
1452 }
1453 else
1454 add = 0;
1455
1456 if (add != 0)
1457 {
1458 bfd_byte *loc;
1459 unsigned short insn, oinsn;
1460 bfd_boolean overflow;
1461
1462 loc = contents + irel->r_offset;
1463 overflow = FALSE;
1464 switch (type)
1465 {
1466 default:
1467 break;
1468
1469 case R_SH_DIR8WPN:
1470 case R_SH_DIR8WPZ:
1471 insn = bfd_get_16 (abfd, loc);
1472 oinsn = insn;
1473 insn += add / 2;
1474 if ((oinsn & 0xff00) != (insn & 0xff00))
1475 overflow = TRUE;
1476 bfd_put_16 (abfd, (bfd_vma) insn, loc);
1477 break;
1478
1479 case R_SH_IND12W:
1480 insn = bfd_get_16 (abfd, loc);
1481 oinsn = insn;
1482 insn += add / 2;
1483 if ((oinsn & 0xf000) != (insn & 0xf000))
1484 overflow = TRUE;
1485 bfd_put_16 (abfd, (bfd_vma) insn, loc);
1486 break;
1487
1488 case R_SH_DIR8WPL:
1489 /* This reloc ignores the least significant 3 bits of
1490 the program counter before adding in the offset.
1491 This means that if ADDR is at an even address, the
1492 swap will not affect the offset. If ADDR is an at an
1493 odd address, then the instruction will be crossing a
1494 four byte boundary, and must be adjusted. */
1495 if ((addr & 3) != 0)
1496 {
1497 insn = bfd_get_16 (abfd, loc);
1498 oinsn = insn;
1499 insn += add / 2;
1500 if ((oinsn & 0xff00) != (insn & 0xff00))
1501 overflow = TRUE;
1502 bfd_put_16 (abfd, (bfd_vma) insn, loc);
1503 }
1504
1505 break;
1506 }
1507
1508 if (overflow)
1509 {
1510 _bfd_error_handler
1511 /* xgettext:c-format */
1512 (_("%pB: %#" PRIx64 ": fatal: reloc overflow while relaxing"),
1513 abfd, (uint64_t) irel->r_offset);
1514 bfd_set_error (bfd_error_bad_value);
1515 return FALSE;
1516 }
1517 }
1518 }
1519
1520 return TRUE;
1521 }
1522 \f
1523 /* Describes one of the various PLT styles. */
1524
1525 struct elf_sh_plt_info
1526 {
1527 /* The template for the first PLT entry, or NULL if there is no special
1528 first entry. */
1529 const bfd_byte *plt0_entry;
1530
1531 /* The size of PLT0_ENTRY in bytes, or 0 if PLT0_ENTRY is NULL. */
1532 bfd_vma plt0_entry_size;
1533
1534 /* Index I is the offset into PLT0_ENTRY of a pointer to
1535 _GLOBAL_OFFSET_TABLE_ + I * 4. The value is MINUS_ONE
1536 if there is no such pointer. */
1537 bfd_vma plt0_got_fields[3];
1538
1539 /* The template for a symbol's PLT entry. */
1540 const bfd_byte *symbol_entry;
1541
1542 /* The size of SYMBOL_ENTRY in bytes. */
1543 bfd_vma symbol_entry_size;
1544
1545 /* Byte offsets of fields in SYMBOL_ENTRY. Not all fields are used
1546 on all targets. The comments by each member indicate the value
1547 that the field must hold. */
1548 struct {
1549 bfd_vma got_entry; /* the address of the symbol's .got.plt entry */
1550 bfd_vma plt; /* .plt (or a branch to .plt on VxWorks) */
1551 bfd_vma reloc_offset; /* the offset of the symbol's JMP_SLOT reloc */
1552 bfd_boolean got20; /* TRUE if got_entry points to a movi20
1553 instruction (instead of a constant pool
1554 entry). */
1555 } symbol_fields;
1556
1557 /* The offset of the resolver stub from the start of SYMBOL_ENTRY. */
1558 bfd_vma symbol_resolve_offset;
1559
1560 /* A different PLT layout which can be used for the first
1561 MAX_SHORT_PLT entries. It must share the same plt0. NULL in
1562 other cases. */
1563 const struct elf_sh_plt_info *short_plt;
1564 };
1565
1566 /* The size in bytes of an entry in the procedure linkage table. */
1567
1568 #define ELF_PLT_ENTRY_SIZE 28
1569
1570 /* First entry in an absolute procedure linkage table look like this. */
1571
1572 /* Note - this code has been "optimised" not to use r2. r2 is used by
1573 GCC to return the address of large structures, so it should not be
1574 corrupted here. This does mean however, that this PLT does not conform
1575 to the SH PIC ABI. That spec says that r0 contains the type of the PLT
1576 and r2 contains the GOT id. This version stores the GOT id in r0 and
1577 ignores the type. Loaders can easily detect this difference however,
1578 since the type will always be 0 or 8, and the GOT ids will always be
1579 greater than or equal to 12. */
1580 static const bfd_byte elf_sh_plt0_entry_be[ELF_PLT_ENTRY_SIZE] =
1581 {
1582 0xd0, 0x05, /* mov.l 2f,r0 */
1583 0x60, 0x02, /* mov.l @r0,r0 */
1584 0x2f, 0x06, /* mov.l r0,@-r15 */
1585 0xd0, 0x03, /* mov.l 1f,r0 */
1586 0x60, 0x02, /* mov.l @r0,r0 */
1587 0x40, 0x2b, /* jmp @r0 */
1588 0x60, 0xf6, /* mov.l @r15+,r0 */
1589 0x00, 0x09, /* nop */
1590 0x00, 0x09, /* nop */
1591 0x00, 0x09, /* nop */
1592 0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
1593 0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
1594 };
1595
1596 static const bfd_byte elf_sh_plt0_entry_le[ELF_PLT_ENTRY_SIZE] =
1597 {
1598 0x05, 0xd0, /* mov.l 2f,r0 */
1599 0x02, 0x60, /* mov.l @r0,r0 */
1600 0x06, 0x2f, /* mov.l r0,@-r15 */
1601 0x03, 0xd0, /* mov.l 1f,r0 */
1602 0x02, 0x60, /* mov.l @r0,r0 */
1603 0x2b, 0x40, /* jmp @r0 */
1604 0xf6, 0x60, /* mov.l @r15+,r0 */
1605 0x09, 0x00, /* nop */
1606 0x09, 0x00, /* nop */
1607 0x09, 0x00, /* nop */
1608 0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
1609 0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
1610 };
1611
1612 /* Sebsequent entries in an absolute procedure linkage table look like
1613 this. */
1614
1615 static const bfd_byte elf_sh_plt_entry_be[ELF_PLT_ENTRY_SIZE] =
1616 {
1617 0xd0, 0x04, /* mov.l 1f,r0 */
1618 0x60, 0x02, /* mov.l @(r0,r12),r0 */
1619 0xd1, 0x02, /* mov.l 0f,r1 */
1620 0x40, 0x2b, /* jmp @r0 */
1621 0x60, 0x13, /* mov r1,r0 */
1622 0xd1, 0x03, /* mov.l 2f,r1 */
1623 0x40, 0x2b, /* jmp @r0 */
1624 0x00, 0x09, /* nop */
1625 0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
1626 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1627 0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
1628 };
1629
1630 static const bfd_byte elf_sh_plt_entry_le[ELF_PLT_ENTRY_SIZE] =
1631 {
1632 0x04, 0xd0, /* mov.l 1f,r0 */
1633 0x02, 0x60, /* mov.l @r0,r0 */
1634 0x02, 0xd1, /* mov.l 0f,r1 */
1635 0x2b, 0x40, /* jmp @r0 */
1636 0x13, 0x60, /* mov r1,r0 */
1637 0x03, 0xd1, /* mov.l 2f,r1 */
1638 0x2b, 0x40, /* jmp @r0 */
1639 0x09, 0x00, /* nop */
1640 0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
1641 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1642 0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
1643 };
1644
1645 /* Entries in a PIC procedure linkage table look like this. */
1646
1647 static const bfd_byte elf_sh_pic_plt_entry_be[ELF_PLT_ENTRY_SIZE] =
1648 {
1649 0xd0, 0x04, /* mov.l 1f,r0 */
1650 0x00, 0xce, /* mov.l @(r0,r12),r0 */
1651 0x40, 0x2b, /* jmp @r0 */
1652 0x00, 0x09, /* nop */
1653 0x50, 0xc2, /* mov.l @(8,r12),r0 */
1654 0xd1, 0x03, /* mov.l 2f,r1 */
1655 0x40, 0x2b, /* jmp @r0 */
1656 0x50, 0xc1, /* mov.l @(4,r12),r0 */
1657 0x00, 0x09, /* nop */
1658 0x00, 0x09, /* nop */
1659 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1660 0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
1661 };
1662
1663 static const bfd_byte elf_sh_pic_plt_entry_le[ELF_PLT_ENTRY_SIZE] =
1664 {
1665 0x04, 0xd0, /* mov.l 1f,r0 */
1666 0xce, 0x00, /* mov.l @(r0,r12),r0 */
1667 0x2b, 0x40, /* jmp @r0 */
1668 0x09, 0x00, /* nop */
1669 0xc2, 0x50, /* mov.l @(8,r12),r0 */
1670 0x03, 0xd1, /* mov.l 2f,r1 */
1671 0x2b, 0x40, /* jmp @r0 */
1672 0xc1, 0x50, /* mov.l @(4,r12),r0 */
1673 0x09, 0x00, /* nop */
1674 0x09, 0x00, /* nop */
1675 0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
1676 0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
1677 };
1678
1679 static const struct elf_sh_plt_info elf_sh_plts[2][2] = {
1680 {
1681 {
1682 /* Big-endian non-PIC. */
1683 elf_sh_plt0_entry_be,
1684 ELF_PLT_ENTRY_SIZE,
1685 { MINUS_ONE, 24, 20 },
1686 elf_sh_plt_entry_be,
1687 ELF_PLT_ENTRY_SIZE,
1688 { 20, 16, 24, FALSE },
1689 8,
1690 NULL
1691 },
1692 {
1693 /* Little-endian non-PIC. */
1694 elf_sh_plt0_entry_le,
1695 ELF_PLT_ENTRY_SIZE,
1696 { MINUS_ONE, 24, 20 },
1697 elf_sh_plt_entry_le,
1698 ELF_PLT_ENTRY_SIZE,
1699 { 20, 16, 24, FALSE },
1700 8,
1701 NULL
1702 },
1703 },
1704 {
1705 {
1706 /* Big-endian PIC. */
1707 elf_sh_plt0_entry_be,
1708 ELF_PLT_ENTRY_SIZE,
1709 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1710 elf_sh_pic_plt_entry_be,
1711 ELF_PLT_ENTRY_SIZE,
1712 { 20, MINUS_ONE, 24, FALSE },
1713 8,
1714 NULL
1715 },
1716 {
1717 /* Little-endian PIC. */
1718 elf_sh_plt0_entry_le,
1719 ELF_PLT_ENTRY_SIZE,
1720 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1721 elf_sh_pic_plt_entry_le,
1722 ELF_PLT_ENTRY_SIZE,
1723 { 20, MINUS_ONE, 24, FALSE },
1724 8,
1725 NULL
1726 },
1727 }
1728 };
1729
1730 #define VXWORKS_PLT_HEADER_SIZE 12
1731 #define VXWORKS_PLT_ENTRY_SIZE 24
1732
1733 static const bfd_byte vxworks_sh_plt0_entry_be[VXWORKS_PLT_HEADER_SIZE] =
1734 {
1735 0xd1, 0x01, /* mov.l @(8,pc),r1 */
1736 0x61, 0x12, /* mov.l @r1,r1 */
1737 0x41, 0x2b, /* jmp @r1 */
1738 0x00, 0x09, /* nop */
1739 0, 0, 0, 0 /* 0: replaced with _GLOBAL_OFFSET_TABLE+8. */
1740 };
1741
1742 static const bfd_byte vxworks_sh_plt0_entry_le[VXWORKS_PLT_HEADER_SIZE] =
1743 {
1744 0x01, 0xd1, /* mov.l @(8,pc),r1 */
1745 0x12, 0x61, /* mov.l @r1,r1 */
1746 0x2b, 0x41, /* jmp @r1 */
1747 0x09, 0x00, /* nop */
1748 0, 0, 0, 0 /* 0: replaced with _GLOBAL_OFFSET_TABLE+8. */
1749 };
1750
1751 static const bfd_byte vxworks_sh_plt_entry_be[VXWORKS_PLT_ENTRY_SIZE] =
1752 {
1753 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1754 0x60, 0x02, /* mov.l @r0,r0 */
1755 0x40, 0x2b, /* jmp @r0 */
1756 0x00, 0x09, /* nop */
1757 0, 0, 0, 0, /* 0: replaced with address of this symbol in .got. */
1758 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1759 0xa0, 0x00, /* bra PLT (We need to fix the offset.) */
1760 0x00, 0x09, /* nop */
1761 0x00, 0x09, /* nop */
1762 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1763 };
1764
1765 static const bfd_byte vxworks_sh_plt_entry_le[VXWORKS_PLT_ENTRY_SIZE] =
1766 {
1767 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1768 0x02, 0x60, /* mov.l @r0,r0 */
1769 0x2b, 0x40, /* jmp @r0 */
1770 0x09, 0x00, /* nop */
1771 0, 0, 0, 0, /* 0: replaced with address of this symbol in .got. */
1772 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1773 0x00, 0xa0, /* bra PLT (We need to fix the offset.) */
1774 0x09, 0x00, /* nop */
1775 0x09, 0x00, /* nop */
1776 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1777 };
1778
1779 static const bfd_byte vxworks_sh_pic_plt_entry_be[VXWORKS_PLT_ENTRY_SIZE] =
1780 {
1781 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1782 0x00, 0xce, /* mov.l @(r0,r12),r0 */
1783 0x40, 0x2b, /* jmp @r0 */
1784 0x00, 0x09, /* nop */
1785 0, 0, 0, 0, /* 0: replaced with offset of this symbol in .got. */
1786 0xd0, 0x01, /* mov.l @(8,pc),r0 */
1787 0x51, 0xc2, /* mov.l @(8,r12),r1 */
1788 0x41, 0x2b, /* jmp @r1 */
1789 0x00, 0x09, /* nop */
1790 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1791 };
1792
1793 static const bfd_byte vxworks_sh_pic_plt_entry_le[VXWORKS_PLT_ENTRY_SIZE] =
1794 {
1795 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1796 0xce, 0x00, /* mov.l @(r0,r12),r0 */
1797 0x2b, 0x40, /* jmp @r0 */
1798 0x09, 0x00, /* nop */
1799 0, 0, 0, 0, /* 0: replaced with offset of this symbol in .got. */
1800 0x01, 0xd0, /* mov.l @(8,pc),r0 */
1801 0xc2, 0x51, /* mov.l @(8,r12),r1 */
1802 0x2b, 0x41, /* jmp @r1 */
1803 0x09, 0x00, /* nop */
1804 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1805 };
1806
1807 static const struct elf_sh_plt_info vxworks_sh_plts[2][2] = {
1808 {
1809 {
1810 /* Big-endian non-PIC. */
1811 vxworks_sh_plt0_entry_be,
1812 VXWORKS_PLT_HEADER_SIZE,
1813 { MINUS_ONE, MINUS_ONE, 8 },
1814 vxworks_sh_plt_entry_be,
1815 VXWORKS_PLT_ENTRY_SIZE,
1816 { 8, 14, 20, FALSE },
1817 12,
1818 NULL
1819 },
1820 {
1821 /* Little-endian non-PIC. */
1822 vxworks_sh_plt0_entry_le,
1823 VXWORKS_PLT_HEADER_SIZE,
1824 { MINUS_ONE, MINUS_ONE, 8 },
1825 vxworks_sh_plt_entry_le,
1826 VXWORKS_PLT_ENTRY_SIZE,
1827 { 8, 14, 20, FALSE },
1828 12,
1829 NULL
1830 },
1831 },
1832 {
1833 {
1834 /* Big-endian PIC. */
1835 NULL,
1836 0,
1837 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1838 vxworks_sh_pic_plt_entry_be,
1839 VXWORKS_PLT_ENTRY_SIZE,
1840 { 8, MINUS_ONE, 20, FALSE },
1841 12,
1842 NULL
1843 },
1844 {
1845 /* Little-endian PIC. */
1846 NULL,
1847 0,
1848 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1849 vxworks_sh_pic_plt_entry_le,
1850 VXWORKS_PLT_ENTRY_SIZE,
1851 { 8, MINUS_ONE, 20, FALSE },
1852 12,
1853 NULL
1854 },
1855 }
1856 };
1857
1858 /* FDPIC PLT entries. Two unimplemented optimizations for lazy
1859 binding are to omit the lazy binding stub when linking with -z now
1860 and to move lazy binding stubs into a separate region for better
1861 cache behavior. */
1862
1863 #define FDPIC_PLT_ENTRY_SIZE 28
1864 #define FDPIC_PLT_LAZY_OFFSET 20
1865
1866 /* FIXME: The lazy binding stub requires a plt0 - which may need to be
1867 duplicated if it is out of range, or which can be inlined. So
1868 right now it is always inlined, which wastes a word per stub. It
1869 might be easier to handle the duplication if we put the lazy
1870 stubs separately. */
1871
1872 static const bfd_byte fdpic_sh_plt_entry_be[FDPIC_PLT_ENTRY_SIZE] =
1873 {
1874 0xd0, 0x02, /* mov.l @(12,pc),r0 */
1875 0x01, 0xce, /* mov.l @(r0,r12),r1 */
1876 0x70, 0x04, /* add #4, r0 */
1877 0x41, 0x2b, /* jmp @r1 */
1878 0x0c, 0xce, /* mov.l @(r0,r12),r12 */
1879 0x00, 0x09, /* nop */
1880 0, 0, 0, 0, /* 0: replaced with offset of this symbol's funcdesc */
1881 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1882 0x60, 0xc2, /* mov.l @r12,r0 */
1883 0x40, 0x2b, /* jmp @r0 */
1884 0x53, 0xc1, /* mov.l @(4,r12),r3 */
1885 0x00, 0x09, /* nop */
1886 };
1887
1888 static const bfd_byte fdpic_sh_plt_entry_le[FDPIC_PLT_ENTRY_SIZE] =
1889 {
1890 0x02, 0xd0, /* mov.l @(12,pc),r0 */
1891 0xce, 0x01, /* mov.l @(r0,r12),r1 */
1892 0x04, 0x70, /* add #4, r0 */
1893 0x2b, 0x41, /* jmp @r1 */
1894 0xce, 0x0c, /* mov.l @(r0,r12),r12 */
1895 0x09, 0x00, /* nop */
1896 0, 0, 0, 0, /* 0: replaced with offset of this symbol's funcdesc */
1897 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1898 0xc2, 0x60, /* mov.l @r12,r0 */
1899 0x2b, 0x40, /* jmp @r0 */
1900 0xc1, 0x53, /* mov.l @(4,r12),r3 */
1901 0x09, 0x00, /* nop */
1902 };
1903
1904 static const struct elf_sh_plt_info fdpic_sh_plts[2] = {
1905 {
1906 /* Big-endian PIC. */
1907 NULL,
1908 0,
1909 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1910 fdpic_sh_plt_entry_be,
1911 FDPIC_PLT_ENTRY_SIZE,
1912 { 12, MINUS_ONE, 16, FALSE },
1913 FDPIC_PLT_LAZY_OFFSET,
1914 NULL
1915 },
1916 {
1917 /* Little-endian PIC. */
1918 NULL,
1919 0,
1920 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1921 fdpic_sh_plt_entry_le,
1922 FDPIC_PLT_ENTRY_SIZE,
1923 { 12, MINUS_ONE, 16, FALSE },
1924 FDPIC_PLT_LAZY_OFFSET,
1925 NULL
1926 },
1927 };
1928
1929 /* On SH2A, we can use the movi20 instruction to generate shorter PLT
1930 entries for the first 64K slots. We use the normal FDPIC PLT entry
1931 past that point; we could also use movi20s, which might be faster,
1932 but would not be any smaller. */
1933
1934 #define FDPIC_SH2A_PLT_ENTRY_SIZE 24
1935 #define FDPIC_SH2A_PLT_LAZY_OFFSET 16
1936
1937 static const bfd_byte fdpic_sh2a_plt_entry_be[FDPIC_SH2A_PLT_ENTRY_SIZE] =
1938 {
1939 0, 0, 0, 0, /* movi20 #gotofffuncdesc,r0 */
1940 0x01, 0xce, /* mov.l @(r0,r12),r1 */
1941 0x70, 0x04, /* add #4, r0 */
1942 0x41, 0x2b, /* jmp @r1 */
1943 0x0c, 0xce, /* mov.l @(r0,r12),r12 */
1944 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1945 0x60, 0xc2, /* mov.l @r12,r0 */
1946 0x40, 0x2b, /* jmp @r0 */
1947 0x53, 0xc1, /* mov.l @(4,r12),r3 */
1948 0x00, 0x09, /* nop */
1949 };
1950
1951 static const bfd_byte fdpic_sh2a_plt_entry_le[FDPIC_SH2A_PLT_ENTRY_SIZE] =
1952 {
1953 0, 0, 0, 0, /* movi20 #gotofffuncdesc,r0 */
1954 0xce, 0x01, /* mov.l @(r0,r12),r1 */
1955 0x04, 0x70, /* add #4, r0 */
1956 0x2b, 0x41, /* jmp @r1 */
1957 0xce, 0x0c, /* mov.l @(r0,r12),r12 */
1958 0, 0, 0, 0, /* 1: replaced with offset into relocation table. */
1959 0xc2, 0x60, /* mov.l @r12,r0 */
1960 0x2b, 0x40, /* jmp @r0 */
1961 0xc1, 0x53, /* mov.l @(4,r12),r3 */
1962 0x09, 0x00, /* nop */
1963 };
1964
1965 static const struct elf_sh_plt_info fdpic_sh2a_short_plt_be = {
1966 /* Big-endian FDPIC, max index 64K. */
1967 NULL,
1968 0,
1969 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1970 fdpic_sh2a_plt_entry_be,
1971 FDPIC_SH2A_PLT_ENTRY_SIZE,
1972 { 0, MINUS_ONE, 12, TRUE },
1973 FDPIC_SH2A_PLT_LAZY_OFFSET,
1974 NULL
1975 };
1976
1977 static const struct elf_sh_plt_info fdpic_sh2a_short_plt_le = {
1978 /* Little-endian FDPIC, max index 64K. */
1979 NULL,
1980 0,
1981 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1982 fdpic_sh2a_plt_entry_le,
1983 FDPIC_SH2A_PLT_ENTRY_SIZE,
1984 { 0, MINUS_ONE, 12, TRUE },
1985 FDPIC_SH2A_PLT_LAZY_OFFSET,
1986 NULL
1987 };
1988
1989 static const struct elf_sh_plt_info fdpic_sh2a_plts[2] = {
1990 {
1991 /* Big-endian PIC. */
1992 NULL,
1993 0,
1994 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
1995 fdpic_sh_plt_entry_be,
1996 FDPIC_PLT_ENTRY_SIZE,
1997 { 12, MINUS_ONE, 16, FALSE },
1998 FDPIC_PLT_LAZY_OFFSET,
1999 &fdpic_sh2a_short_plt_be
2000 },
2001 {
2002 /* Little-endian PIC. */
2003 NULL,
2004 0,
2005 { MINUS_ONE, MINUS_ONE, MINUS_ONE },
2006 fdpic_sh_plt_entry_le,
2007 FDPIC_PLT_ENTRY_SIZE,
2008 { 12, MINUS_ONE, 16, FALSE },
2009 FDPIC_PLT_LAZY_OFFSET,
2010 &fdpic_sh2a_short_plt_le
2011 },
2012 };
2013
2014 /* Return the type of PLT associated with ABFD. PIC_P is true if
2015 the object is position-independent. */
2016
2017 static const struct elf_sh_plt_info *
2018 get_plt_info (bfd *abfd, bfd_boolean pic_p)
2019 {
2020 if (fdpic_object_p (abfd))
2021 {
2022 /* If any input file requires SH2A we can use a shorter PLT
2023 sequence. */
2024 if (sh_get_arch_from_bfd_mach (bfd_get_mach (abfd)) & arch_sh2a_base)
2025 return &fdpic_sh2a_plts[!bfd_big_endian (abfd)];
2026 else
2027 return &fdpic_sh_plts[!bfd_big_endian (abfd)];
2028 }
2029 if (vxworks_object_p (abfd))
2030 return &vxworks_sh_plts[pic_p][!bfd_big_endian (abfd)];
2031 return &elf_sh_plts[pic_p][!bfd_big_endian (abfd)];
2032 }
2033
2034 /* Install a 32-bit PLT field starting at ADDR, which occurs in OUTPUT_BFD.
2035 VALUE is the field's value and CODE_P is true if VALUE refers to code,
2036 not data. */
2037
2038 inline static void
2039 install_plt_field (bfd *output_bfd, bfd_boolean code_p ATTRIBUTE_UNUSED,
2040 unsigned long value, bfd_byte *addr)
2041 {
2042 bfd_put_32 (output_bfd, value, addr);
2043 }
2044
2045 /* The number of PLT entries which can use a shorter PLT, if any.
2046 Currently always 64K, since only SH-2A FDPIC uses this; a
2047 20-bit movi20 can address that many function descriptors below
2048 _GLOBAL_OFFSET_TABLE_. */
2049 #define MAX_SHORT_PLT 65536
2050
2051 /* Return the index of the PLT entry at byte offset OFFSET. */
2052
2053 static bfd_vma
2054 get_plt_index (const struct elf_sh_plt_info *info, bfd_vma offset)
2055 {
2056 bfd_vma plt_index = 0;
2057
2058 offset -= info->plt0_entry_size;
2059 if (info->short_plt != NULL)
2060 {
2061 if (offset > MAX_SHORT_PLT * info->short_plt->symbol_entry_size)
2062 {
2063 plt_index = MAX_SHORT_PLT;
2064 offset -= MAX_SHORT_PLT * info->short_plt->symbol_entry_size;
2065 }
2066 else
2067 info = info->short_plt;
2068 }
2069 return plt_index + offset / info->symbol_entry_size;
2070 }
2071
2072 /* Do the inverse operation. */
2073
2074 static bfd_vma
2075 get_plt_offset (const struct elf_sh_plt_info *info, bfd_vma plt_index)
2076 {
2077 bfd_vma offset = 0;
2078
2079 if (info->short_plt != NULL)
2080 {
2081 if (plt_index > MAX_SHORT_PLT)
2082 {
2083 offset = MAX_SHORT_PLT * info->short_plt->symbol_entry_size;
2084 plt_index -= MAX_SHORT_PLT;
2085 }
2086 else
2087 info = info->short_plt;
2088 }
2089 return (offset + info->plt0_entry_size
2090 + (plt_index * info->symbol_entry_size));
2091 }
2092
2093 union gotref
2094 {
2095 bfd_signed_vma refcount;
2096 bfd_vma offset;
2097 };
2098
2099 /* sh ELF linker hash entry. */
2100
2101 struct elf_sh_link_hash_entry
2102 {
2103 struct elf_link_hash_entry root;
2104
2105 /* Track dynamic relocs copied for this symbol. */
2106 struct elf_dyn_relocs *dyn_relocs;
2107
2108 bfd_signed_vma gotplt_refcount;
2109
2110 /* A local function descriptor, for FDPIC. The refcount counts
2111 R_SH_FUNCDESC, R_SH_GOTOFFFUNCDESC, and R_SH_GOTOFFFUNCDESC20
2112 relocations; the PLT and GOT entry are accounted
2113 for separately. After adjust_dynamic_symbol, the offset is
2114 MINUS_ONE if there is no local descriptor (dynamic linker
2115 managed and no PLT entry, or undefined weak non-dynamic).
2116 During check_relocs we do not yet know whether the local
2117 descriptor will be canonical. */
2118 union gotref funcdesc;
2119
2120 /* How many of the above refcounted relocations were R_SH_FUNCDESC,
2121 and thus require fixups or relocations. */
2122 bfd_signed_vma abs_funcdesc_refcount;
2123
2124 enum got_type {
2125 GOT_UNKNOWN = 0, GOT_NORMAL, GOT_TLS_GD, GOT_TLS_IE, GOT_FUNCDESC
2126 } got_type;
2127 };
2128
2129 #define sh_elf_hash_entry(ent) ((struct elf_sh_link_hash_entry *)(ent))
2130
2131 struct sh_elf_obj_tdata
2132 {
2133 struct elf_obj_tdata root;
2134
2135 /* got_type for each local got entry. */
2136 char *local_got_type;
2137
2138 /* Function descriptor refcount and offset for each local symbol. */
2139 union gotref *local_funcdesc;
2140 };
2141
2142 #define sh_elf_tdata(abfd) \
2143 ((struct sh_elf_obj_tdata *) (abfd)->tdata.any)
2144
2145 #define sh_elf_local_got_type(abfd) \
2146 (sh_elf_tdata (abfd)->local_got_type)
2147
2148 #define sh_elf_local_funcdesc(abfd) \
2149 (sh_elf_tdata (abfd)->local_funcdesc)
2150
2151 #define is_sh_elf(bfd) \
2152 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2153 && elf_tdata (bfd) != NULL \
2154 && elf_object_id (bfd) == SH_ELF_DATA)
2155
2156 /* Override the generic function because we need to store sh_elf_obj_tdata
2157 as the specific tdata. */
2158
2159 static bfd_boolean
2160 sh_elf_mkobject (bfd *abfd)
2161 {
2162 return bfd_elf_allocate_object (abfd, sizeof (struct sh_elf_obj_tdata),
2163 SH_ELF_DATA);
2164 }
2165
2166 /* sh ELF linker hash table. */
2167
2168 struct elf_sh_link_hash_table
2169 {
2170 struct elf_link_hash_table root;
2171
2172 /* Short-cuts to get to dynamic linker sections. */
2173 asection *sdynbss;
2174 asection *srelbss;
2175 asection *sfuncdesc;
2176 asection *srelfuncdesc;
2177 asection *srofixup;
2178
2179 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2180 asection *srelplt2;
2181
2182 /* Small local sym cache. */
2183 struct sym_cache sym_cache;
2184
2185 /* A counter or offset to track a TLS got entry. */
2186 union
2187 {
2188 bfd_signed_vma refcount;
2189 bfd_vma offset;
2190 } tls_ldm_got;
2191
2192 /* The type of PLT to use. */
2193 const struct elf_sh_plt_info *plt_info;
2194
2195 /* True if the target system is VxWorks. */
2196 bfd_boolean vxworks_p;
2197
2198 /* True if the target system uses FDPIC. */
2199 bfd_boolean fdpic_p;
2200 };
2201
2202 /* Traverse an sh ELF linker hash table. */
2203
2204 #define sh_elf_link_hash_traverse(table, func, info) \
2205 (elf_link_hash_traverse \
2206 (&(table)->root, \
2207 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2208 (info)))
2209
2210 /* Get the sh ELF linker hash table from a link_info structure. */
2211
2212 #define sh_elf_hash_table(p) \
2213 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2214 == SH_ELF_DATA ? ((struct elf_sh_link_hash_table *) ((p)->hash)) : NULL)
2215
2216 /* Create an entry in an sh ELF linker hash table. */
2217
2218 static struct bfd_hash_entry *
2219 sh_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2220 struct bfd_hash_table *table,
2221 const char *string)
2222 {
2223 struct elf_sh_link_hash_entry *ret =
2224 (struct elf_sh_link_hash_entry *) entry;
2225
2226 /* Allocate the structure if it has not already been allocated by a
2227 subclass. */
2228 if (ret == (struct elf_sh_link_hash_entry *) NULL)
2229 ret = ((struct elf_sh_link_hash_entry *)
2230 bfd_hash_allocate (table,
2231 sizeof (struct elf_sh_link_hash_entry)));
2232 if (ret == (struct elf_sh_link_hash_entry *) NULL)
2233 return (struct bfd_hash_entry *) ret;
2234
2235 /* Call the allocation method of the superclass. */
2236 ret = ((struct elf_sh_link_hash_entry *)
2237 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2238 table, string));
2239 if (ret != (struct elf_sh_link_hash_entry *) NULL)
2240 {
2241 ret->dyn_relocs = NULL;
2242 ret->gotplt_refcount = 0;
2243 ret->funcdesc.refcount = 0;
2244 ret->abs_funcdesc_refcount = 0;
2245 ret->got_type = GOT_UNKNOWN;
2246 }
2247
2248 return (struct bfd_hash_entry *) ret;
2249 }
2250
2251 /* Create an sh ELF linker hash table. */
2252
2253 static struct bfd_link_hash_table *
2254 sh_elf_link_hash_table_create (bfd *abfd)
2255 {
2256 struct elf_sh_link_hash_table *ret;
2257 bfd_size_type amt = sizeof (struct elf_sh_link_hash_table);
2258
2259 ret = (struct elf_sh_link_hash_table *) bfd_zmalloc (amt);
2260 if (ret == (struct elf_sh_link_hash_table *) NULL)
2261 return NULL;
2262
2263 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
2264 sh_elf_link_hash_newfunc,
2265 sizeof (struct elf_sh_link_hash_entry),
2266 SH_ELF_DATA))
2267 {
2268 free (ret);
2269 return NULL;
2270 }
2271
2272 ret->vxworks_p = vxworks_object_p (abfd);
2273 ret->fdpic_p = fdpic_object_p (abfd);
2274
2275 return &ret->root.root;
2276 }
2277
2278 static bfd_boolean
2279 sh_elf_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
2280 struct bfd_link_info *info, asection *p)
2281 {
2282 struct elf_sh_link_hash_table *htab = sh_elf_hash_table (info);
2283
2284 /* Non-FDPIC binaries do not need dynamic symbols for sections. */
2285 if (!htab->fdpic_p)
2286 return TRUE;
2287
2288 /* We need dynamic symbols for every section, since segments can
2289 relocate independently. */
2290 switch (elf_section_data (p)->this_hdr.sh_type)
2291 {
2292 case SHT_PROGBITS:
2293 case SHT_NOBITS:
2294 /* If sh_type is yet undecided, assume it could be
2295 SHT_PROGBITS/SHT_NOBITS. */
2296 case SHT_NULL:
2297 return FALSE;
2298
2299 /* There shouldn't be section relative relocations
2300 against any other section. */
2301 default:
2302 return TRUE;
2303 }
2304 }
2305
2306 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2307 shortcuts to them in our hash table. */
2308
2309 static bfd_boolean
2310 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2311 {
2312 struct elf_sh_link_hash_table *htab;
2313
2314 if (! _bfd_elf_create_got_section (dynobj, info))
2315 return FALSE;
2316
2317 htab = sh_elf_hash_table (info);
2318 if (htab == NULL)
2319 return FALSE;
2320
2321 htab->sfuncdesc = bfd_make_section_anyway_with_flags (dynobj, ".got.funcdesc",
2322 (SEC_ALLOC | SEC_LOAD
2323 | SEC_HAS_CONTENTS
2324 | SEC_IN_MEMORY
2325 | SEC_LINKER_CREATED));
2326 if (htab->sfuncdesc == NULL
2327 || ! bfd_set_section_alignment (dynobj, htab->sfuncdesc, 2))
2328 return FALSE;
2329
2330 htab->srelfuncdesc = bfd_make_section_anyway_with_flags (dynobj,
2331 ".rela.got.funcdesc",
2332 (SEC_ALLOC | SEC_LOAD
2333 | SEC_HAS_CONTENTS
2334 | SEC_IN_MEMORY
2335 | SEC_LINKER_CREATED
2336 | SEC_READONLY));
2337 if (htab->srelfuncdesc == NULL
2338 || ! bfd_set_section_alignment (dynobj, htab->srelfuncdesc, 2))
2339 return FALSE;
2340
2341 /* Also create .rofixup. */
2342 htab->srofixup = bfd_make_section_anyway_with_flags (dynobj, ".rofixup",
2343 (SEC_ALLOC | SEC_LOAD
2344 | SEC_HAS_CONTENTS
2345 | SEC_IN_MEMORY
2346 | SEC_LINKER_CREATED
2347 | SEC_READONLY));
2348 if (htab->srofixup == NULL
2349 || ! bfd_set_section_alignment (dynobj, htab->srofixup, 2))
2350 return FALSE;
2351
2352 return TRUE;
2353 }
2354
2355 /* Create dynamic sections when linking against a dynamic object. */
2356
2357 static bfd_boolean
2358 sh_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2359 {
2360 struct elf_sh_link_hash_table *htab;
2361 flagword flags, pltflags;
2362 asection *s;
2363 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2364 int ptralign = 0;
2365
2366 switch (bed->s->arch_size)
2367 {
2368 case 32:
2369 ptralign = 2;
2370 break;
2371
2372 case 64:
2373 ptralign = 3;
2374 break;
2375
2376 default:
2377 bfd_set_error (bfd_error_bad_value);
2378 return FALSE;
2379 }
2380
2381 htab = sh_elf_hash_table (info);
2382 if (htab == NULL)
2383 return FALSE;
2384
2385 if (htab->root.dynamic_sections_created)
2386 return TRUE;
2387
2388 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2389 .rel[a].bss sections. */
2390
2391 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2392 | SEC_LINKER_CREATED);
2393
2394 pltflags = flags;
2395 pltflags |= SEC_CODE;
2396 if (bed->plt_not_loaded)
2397 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
2398 if (bed->plt_readonly)
2399 pltflags |= SEC_READONLY;
2400
2401 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
2402 htab->root.splt = s;
2403 if (s == NULL
2404 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
2405 return FALSE;
2406
2407 if (bed->want_plt_sym)
2408 {
2409 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2410 .plt section. */
2411 struct elf_link_hash_entry *h;
2412 struct bfd_link_hash_entry *bh = NULL;
2413
2414 if (! (_bfd_generic_link_add_one_symbol
2415 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2416 (bfd_vma) 0, (const char *) NULL, FALSE,
2417 get_elf_backend_data (abfd)->collect, &bh)))
2418 return FALSE;
2419
2420 h = (struct elf_link_hash_entry *) bh;
2421 h->def_regular = 1;
2422 h->type = STT_OBJECT;
2423 htab->root.hplt = h;
2424
2425 if (bfd_link_pic (info)
2426 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2427 return FALSE;
2428 }
2429
2430 s = bfd_make_section_anyway_with_flags (abfd,
2431 bed->default_use_rela_p
2432 ? ".rela.plt" : ".rel.plt",
2433 flags | SEC_READONLY);
2434 htab->root.srelplt = s;
2435 if (s == NULL
2436 || ! bfd_set_section_alignment (abfd, s, ptralign))
2437 return FALSE;
2438
2439 if (htab->root.sgot == NULL
2440 && !create_got_section (abfd, info))
2441 return FALSE;
2442
2443 if (bed->want_dynbss)
2444 {
2445 /* The .dynbss section is a place to put symbols which are defined
2446 by dynamic objects, are referenced by regular objects, and are
2447 not functions. We must allocate space for them in the process
2448 image and use a R_*_COPY reloc to tell the dynamic linker to
2449 initialize them at run time. The linker script puts the .dynbss
2450 section into the .bss section of the final image. */
2451 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
2452 SEC_ALLOC | SEC_LINKER_CREATED);
2453 htab->sdynbss = s;
2454 if (s == NULL)
2455 return FALSE;
2456
2457 /* The .rel[a].bss section holds copy relocs. This section is not
2458 normally needed. We need to create it here, though, so that the
2459 linker will map it to an output section. We can't just create it
2460 only if we need it, because we will not know whether we need it
2461 until we have seen all the input files, and the first time the
2462 main linker code calls BFD after examining all the input files
2463 (size_dynamic_sections) the input sections have already been
2464 mapped to the output sections. If the section turns out not to
2465 be needed, we can discard it later. We will never need this
2466 section when generating a shared object, since they do not use
2467 copy relocs. */
2468 if (! bfd_link_pic (info))
2469 {
2470 s = bfd_make_section_anyway_with_flags (abfd,
2471 (bed->default_use_rela_p
2472 ? ".rela.bss" : ".rel.bss"),
2473 flags | SEC_READONLY);
2474 htab->srelbss = s;
2475 if (s == NULL
2476 || ! bfd_set_section_alignment (abfd, s, ptralign))
2477 return FALSE;
2478 }
2479 }
2480
2481 if (htab->vxworks_p)
2482 {
2483 if (!elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2484 return FALSE;
2485 }
2486
2487 return TRUE;
2488 }
2489 \f
2490 /* Find dynamic relocs for H that apply to read-only sections. */
2491
2492 static asection *
2493 readonly_dynrelocs (struct elf_link_hash_entry *h)
2494 {
2495 struct elf_dyn_relocs *p;
2496
2497 for (p = sh_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
2498 {
2499 asection *s = p->sec->output_section;
2500
2501 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2502 return p->sec;
2503 }
2504 return NULL;
2505 }
2506
2507 /* Adjust a symbol defined by a dynamic object and referenced by a
2508 regular object. The current definition is in some section of the
2509 dynamic object, but we're not including those sections. We have to
2510 change the definition to something the rest of the link can
2511 understand. */
2512
2513 static bfd_boolean
2514 sh_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2515 struct elf_link_hash_entry *h)
2516 {
2517 struct elf_sh_link_hash_table *htab;
2518 asection *s;
2519
2520 htab = sh_elf_hash_table (info);
2521 if (htab == NULL)
2522 return FALSE;
2523
2524 /* Make sure we know what is going on here. */
2525 BFD_ASSERT (htab->root.dynobj != NULL
2526 && (h->needs_plt
2527 || h->is_weakalias
2528 || (h->def_dynamic
2529 && h->ref_regular
2530 && !h->def_regular)));
2531
2532 /* If this is a function, put it in the procedure linkage table. We
2533 will fill in the contents of the procedure linkage table later,
2534 when we know the address of the .got section. */
2535 if (h->type == STT_FUNC
2536 || h->needs_plt)
2537 {
2538 if (h->plt.refcount <= 0
2539 || SYMBOL_CALLS_LOCAL (info, h)
2540 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2541 && h->root.type == bfd_link_hash_undefweak))
2542 {
2543 /* This case can occur if we saw a PLT reloc in an input
2544 file, but the symbol was never referred to by a dynamic
2545 object. In such a case, we don't actually need to build
2546 a procedure linkage table, and we can just do a REL32
2547 reloc instead. */
2548 h->plt.offset = (bfd_vma) -1;
2549 h->needs_plt = 0;
2550 }
2551
2552 return TRUE;
2553 }
2554 else
2555 h->plt.offset = (bfd_vma) -1;
2556
2557 /* If this is a weak symbol, and there is a real definition, the
2558 processor independent code will have arranged for us to see the
2559 real definition first, and we can just use the same value. */
2560 if (h->is_weakalias)
2561 {
2562 struct elf_link_hash_entry *def = weakdef (h);
2563 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2564 h->root.u.def.section = def->root.u.def.section;
2565 h->root.u.def.value = def->root.u.def.value;
2566 if (info->nocopyreloc)
2567 h->non_got_ref = def->non_got_ref;
2568 return TRUE;
2569 }
2570
2571 /* This is a reference to a symbol defined by a dynamic object which
2572 is not a function. */
2573
2574 /* If we are creating a shared library, we must presume that the
2575 only references to the symbol are via the global offset table.
2576 For such cases we need not do anything here; the relocations will
2577 be handled correctly by relocate_section. */
2578 if (bfd_link_pic (info))
2579 return TRUE;
2580
2581 /* If there are no references to this symbol that do not use the
2582 GOT, we don't need to generate a copy reloc. */
2583 if (!h->non_got_ref)
2584 return TRUE;
2585
2586 /* If -z nocopyreloc was given, we won't generate them either. */
2587 if (0 && info->nocopyreloc)
2588 {
2589 h->non_got_ref = 0;
2590 return TRUE;
2591 }
2592
2593 /* If we don't find any dynamic relocs in read-only sections, then
2594 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2595 if (0 && !readonly_dynrelocs (h))
2596 {
2597 h->non_got_ref = 0;
2598 return TRUE;
2599 }
2600
2601 /* We must allocate the symbol in our .dynbss section, which will
2602 become part of the .bss section of the executable. There will be
2603 an entry for this symbol in the .dynsym section. The dynamic
2604 object will contain position independent code, so all references
2605 from the dynamic object to this symbol will go through the global
2606 offset table. The dynamic linker will use the .dynsym entry to
2607 determine the address it must put in the global offset table, so
2608 both the dynamic object and the regular object will refer to the
2609 same memory location for the variable. */
2610
2611 s = htab->sdynbss;
2612 BFD_ASSERT (s != NULL);
2613
2614 /* We must generate a R_SH_COPY reloc to tell the dynamic linker to
2615 copy the initial value out of the dynamic object and into the
2616 runtime process image. We need to remember the offset into the
2617 .rela.bss section we are going to use. */
2618 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2619 {
2620 asection *srel;
2621
2622 srel = htab->srelbss;
2623 BFD_ASSERT (srel != NULL);
2624 srel->size += sizeof (Elf32_External_Rela);
2625 h->needs_copy = 1;
2626 }
2627
2628 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2629 }
2630
2631 /* Allocate space in .plt, .got and associated reloc sections for
2632 dynamic relocs. */
2633
2634 static bfd_boolean
2635 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2636 {
2637 struct bfd_link_info *info;
2638 struct elf_sh_link_hash_table *htab;
2639 struct elf_sh_link_hash_entry *eh;
2640 struct elf_dyn_relocs *p;
2641
2642 if (h->root.type == bfd_link_hash_indirect)
2643 return TRUE;
2644
2645 info = (struct bfd_link_info *) inf;
2646 htab = sh_elf_hash_table (info);
2647 if (htab == NULL)
2648 return FALSE;
2649
2650 eh = (struct elf_sh_link_hash_entry *) h;
2651 if ((h->got.refcount > 0
2652 || h->forced_local)
2653 && eh->gotplt_refcount > 0)
2654 {
2655 /* The symbol has been forced local, or we have some direct got refs,
2656 so treat all the gotplt refs as got refs. */
2657 h->got.refcount += eh->gotplt_refcount;
2658 if (h->plt.refcount >= eh->gotplt_refcount)
2659 h->plt.refcount -= eh->gotplt_refcount;
2660 }
2661
2662 if (htab->root.dynamic_sections_created
2663 && h->plt.refcount > 0
2664 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2665 || h->root.type != bfd_link_hash_undefweak))
2666 {
2667 /* Make sure this symbol is output as a dynamic symbol.
2668 Undefined weak syms won't yet be marked as dynamic. */
2669 if (h->dynindx == -1
2670 && !h->forced_local)
2671 {
2672 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2673 return FALSE;
2674 }
2675
2676 if (bfd_link_pic (info)
2677 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2678 {
2679 asection *s = htab->root.splt;
2680 const struct elf_sh_plt_info *plt_info;
2681
2682 /* If this is the first .plt entry, make room for the special
2683 first entry. */
2684 if (s->size == 0)
2685 s->size += htab->plt_info->plt0_entry_size;
2686
2687 h->plt.offset = s->size;
2688
2689 /* If this symbol is not defined in a regular file, and we are
2690 not generating a shared library, then set the symbol to this
2691 location in the .plt. This is required to make function
2692 pointers compare as equal between the normal executable and
2693 the shared library. Skip this for FDPIC, since the
2694 function's address will be the address of the canonical
2695 function descriptor. */
2696 if (!htab->fdpic_p && !bfd_link_pic (info) && !h->def_regular)
2697 {
2698 h->root.u.def.section = s;
2699 h->root.u.def.value = h->plt.offset;
2700 }
2701
2702 /* Make room for this entry. */
2703 plt_info = htab->plt_info;
2704 if (plt_info->short_plt != NULL
2705 && (get_plt_index (plt_info->short_plt, s->size) < MAX_SHORT_PLT))
2706 plt_info = plt_info->short_plt;
2707 s->size += plt_info->symbol_entry_size;
2708
2709 /* We also need to make an entry in the .got.plt section, which
2710 will be placed in the .got section by the linker script. */
2711 if (!htab->fdpic_p)
2712 htab->root.sgotplt->size += 4;
2713 else
2714 htab->root.sgotplt->size += 8;
2715
2716 /* We also need to make an entry in the .rel.plt section. */
2717 htab->root.srelplt->size += sizeof (Elf32_External_Rela);
2718
2719 if (htab->vxworks_p && !bfd_link_pic (info))
2720 {
2721 /* VxWorks executables have a second set of relocations
2722 for each PLT entry. They go in a separate relocation
2723 section, which is processed by the kernel loader. */
2724
2725 /* There is a relocation for the initial PLT entry:
2726 an R_SH_DIR32 relocation for _GLOBAL_OFFSET_TABLE_. */
2727 if (h->plt.offset == htab->plt_info->plt0_entry_size)
2728 htab->srelplt2->size += sizeof (Elf32_External_Rela);
2729
2730 /* There are two extra relocations for each subsequent
2731 PLT entry: an R_SH_DIR32 relocation for the GOT entry,
2732 and an R_SH_DIR32 relocation for the PLT entry. */
2733 htab->srelplt2->size += sizeof (Elf32_External_Rela) * 2;
2734 }
2735 }
2736 else
2737 {
2738 h->plt.offset = (bfd_vma) -1;
2739 h->needs_plt = 0;
2740 }
2741 }
2742 else
2743 {
2744 h->plt.offset = (bfd_vma) -1;
2745 h->needs_plt = 0;
2746 }
2747
2748 if (h->got.refcount > 0)
2749 {
2750 asection *s;
2751 bfd_boolean dyn;
2752 enum got_type got_type = sh_elf_hash_entry (h)->got_type;
2753
2754 /* Make sure this symbol is output as a dynamic symbol.
2755 Undefined weak syms won't yet be marked as dynamic. */
2756 if (h->dynindx == -1
2757 && !h->forced_local)
2758 {
2759 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2760 return FALSE;
2761 }
2762
2763 s = htab->root.sgot;
2764 h->got.offset = s->size;
2765 s->size += 4;
2766 /* R_SH_TLS_GD needs 2 consecutive GOT slots. */
2767 if (got_type == GOT_TLS_GD)
2768 s->size += 4;
2769 dyn = htab->root.dynamic_sections_created;
2770 if (!dyn)
2771 {
2772 /* No dynamic relocations required. */
2773 if (htab->fdpic_p && !bfd_link_pic (info)
2774 && h->root.type != bfd_link_hash_undefweak
2775 && (got_type == GOT_NORMAL || got_type == GOT_FUNCDESC))
2776 htab->srofixup->size += 4;
2777 }
2778 /* No dynamic relocations required when IE->LE conversion happens. */
2779 else if (got_type == GOT_TLS_IE
2780 && !h->def_dynamic
2781 && !bfd_link_pic (info))
2782 ;
2783 /* R_SH_TLS_IE_32 needs one dynamic relocation if dynamic,
2784 R_SH_TLS_GD needs one if local symbol and two if global. */
2785 else if ((got_type == GOT_TLS_GD && h->dynindx == -1)
2786 || got_type == GOT_TLS_IE)
2787 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
2788 else if (got_type == GOT_TLS_GD)
2789 htab->root.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2790 else if (got_type == GOT_FUNCDESC)
2791 {
2792 if (!bfd_link_pic (info) && SYMBOL_FUNCDESC_LOCAL (info, h))
2793 htab->srofixup->size += 4;
2794 else
2795 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
2796 }
2797 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2798 || h->root.type != bfd_link_hash_undefweak)
2799 && (bfd_link_pic (info)
2800 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2801 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
2802 else if (htab->fdpic_p
2803 && !bfd_link_pic (info)
2804 && got_type == GOT_NORMAL
2805 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2806 || h->root.type != bfd_link_hash_undefweak))
2807 htab->srofixup->size += 4;
2808 }
2809 else
2810 h->got.offset = (bfd_vma) -1;
2811
2812 /* Allocate space for any dynamic relocations to function
2813 descriptors, canonical or otherwise. We need to relocate the
2814 reference unless it resolves to zero, which only happens for
2815 undefined weak symbols (either non-default visibility, or when
2816 static linking). Any GOT slot is accounted for elsewhere. */
2817 if (eh->abs_funcdesc_refcount > 0
2818 && (h->root.type != bfd_link_hash_undefweak
2819 || (htab->root.dynamic_sections_created
2820 && ! SYMBOL_CALLS_LOCAL (info, h))))
2821 {
2822 if (!bfd_link_pic (info) && SYMBOL_FUNCDESC_LOCAL (info, h))
2823 htab->srofixup->size += eh->abs_funcdesc_refcount * 4;
2824 else
2825 htab->root.srelgot->size
2826 += eh->abs_funcdesc_refcount * sizeof (Elf32_External_Rela);
2827 }
2828
2829 /* We must allocate a function descriptor if there are references to
2830 a canonical descriptor (R_SH_GOTFUNCDESC or R_SH_FUNCDESC) and
2831 the dynamic linker isn't going to allocate it. None of this
2832 applies if we already created one in .got.plt, but if the
2833 canonical function descriptor can be in this object, there
2834 won't be a PLT entry at all. */
2835 if ((eh->funcdesc.refcount > 0
2836 || (h->got.offset != MINUS_ONE && eh->got_type == GOT_FUNCDESC))
2837 && h->root.type != bfd_link_hash_undefweak
2838 && SYMBOL_FUNCDESC_LOCAL (info, h))
2839 {
2840 /* Make room for this function descriptor. */
2841 eh->funcdesc.offset = htab->sfuncdesc->size;
2842 htab->sfuncdesc->size += 8;
2843
2844 /* We will need a relocation or two fixups to initialize the
2845 function descriptor, so allocate those too. */
2846 if (!bfd_link_pic (info) && SYMBOL_CALLS_LOCAL (info, h))
2847 htab->srofixup->size += 8;
2848 else
2849 htab->srelfuncdesc->size += sizeof (Elf32_External_Rela);
2850 }
2851
2852 if (eh->dyn_relocs == NULL)
2853 return TRUE;
2854
2855 /* In the shared -Bsymbolic case, discard space allocated for
2856 dynamic pc-relative relocs against symbols which turn out to be
2857 defined in regular objects. For the normal shared case, discard
2858 space for pc-relative relocs that have become local due to symbol
2859 visibility changes. */
2860
2861 if (bfd_link_pic (info))
2862 {
2863 if (SYMBOL_CALLS_LOCAL (info, h))
2864 {
2865 struct elf_dyn_relocs **pp;
2866
2867 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2868 {
2869 p->count -= p->pc_count;
2870 p->pc_count = 0;
2871 if (p->count == 0)
2872 *pp = p->next;
2873 else
2874 pp = &p->next;
2875 }
2876 }
2877
2878 if (htab->vxworks_p)
2879 {
2880 struct elf_dyn_relocs **pp;
2881
2882 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2883 {
2884 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2885 *pp = p->next;
2886 else
2887 pp = &p->next;
2888 }
2889 }
2890
2891 /* Also discard relocs on undefined weak syms with non-default
2892 visibility. */
2893 if (eh->dyn_relocs != NULL
2894 && h->root.type == bfd_link_hash_undefweak)
2895 {
2896 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2897 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2898 eh->dyn_relocs = NULL;
2899
2900 /* Make sure undefined weak symbols are output as a dynamic
2901 symbol in PIEs. */
2902 else if (h->dynindx == -1
2903 && !h->forced_local)
2904 {
2905 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2906 return FALSE;
2907 }
2908 }
2909 }
2910 else
2911 {
2912 /* For the non-shared case, discard space for relocs against
2913 symbols which turn out to need copy relocs or are not
2914 dynamic. */
2915
2916 if (!h->non_got_ref
2917 && ((h->def_dynamic
2918 && !h->def_regular)
2919 || (htab->root.dynamic_sections_created
2920 && (h->root.type == bfd_link_hash_undefweak
2921 || h->root.type == bfd_link_hash_undefined))))
2922 {
2923 /* Make sure this symbol is output as a dynamic symbol.
2924 Undefined weak syms won't yet be marked as dynamic. */
2925 if (h->dynindx == -1
2926 && !h->forced_local)
2927 {
2928 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2929 return FALSE;
2930 }
2931
2932 /* If that succeeded, we know we'll be keeping all the
2933 relocs. */
2934 if (h->dynindx != -1)
2935 goto keep;
2936 }
2937
2938 eh->dyn_relocs = NULL;
2939
2940 keep: ;
2941 }
2942
2943 /* Finally, allocate space. */
2944 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2945 {
2946 asection *sreloc = elf_section_data (p->sec)->sreloc;
2947 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2948
2949 /* If we need relocations, we do not need fixups. */
2950 if (htab->fdpic_p && !bfd_link_pic (info))
2951 htab->srofixup->size -= 4 * (p->count - p->pc_count);
2952 }
2953
2954 return TRUE;
2955 }
2956
2957 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
2958 read-only sections. */
2959
2960 static bfd_boolean
2961 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
2962 {
2963 asection *sec;
2964
2965 if (h->root.type == bfd_link_hash_indirect)
2966 return TRUE;
2967
2968 sec = readonly_dynrelocs (h);
2969 if (sec != NULL)
2970 {
2971 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
2972
2973 info->flags |= DF_TEXTREL;
2974 info->callbacks->minfo
2975 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
2976 sec->owner, h->root.root.string, sec);
2977
2978 /* Not an error, just cut short the traversal. */
2979 return FALSE;
2980 }
2981 return TRUE;
2982 }
2983
2984 /* This function is called after all the input files have been read,
2985 and the input sections have been assigned to output sections.
2986 It's a convenient place to determine the PLT style. */
2987
2988 static bfd_boolean
2989 sh_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
2990 {
2991 sh_elf_hash_table (info)->plt_info = get_plt_info (output_bfd,
2992 bfd_link_pic (info));
2993
2994 if (sh_elf_hash_table (info)->fdpic_p && !bfd_link_relocatable (info)
2995 && !bfd_elf_stack_segment_size (output_bfd, info,
2996 "__stacksize", DEFAULT_STACK_SIZE))
2997 return FALSE;
2998 return TRUE;
2999 }
3000
3001 /* Set the sizes of the dynamic sections. */
3002
3003 static bfd_boolean
3004 sh_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3005 struct bfd_link_info *info)
3006 {
3007 struct elf_sh_link_hash_table *htab;
3008 bfd *dynobj;
3009 asection *s;
3010 bfd_boolean relocs;
3011 bfd *ibfd;
3012
3013 htab = sh_elf_hash_table (info);
3014 if (htab == NULL)
3015 return FALSE;
3016
3017 dynobj = htab->root.dynobj;
3018 BFD_ASSERT (dynobj != NULL);
3019
3020 if (htab->root.dynamic_sections_created)
3021 {
3022 /* Set the contents of the .interp section to the interpreter. */
3023 if (bfd_link_executable (info) && !info->nointerp)
3024 {
3025 s = bfd_get_linker_section (dynobj, ".interp");
3026 BFD_ASSERT (s != NULL);
3027 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3028 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3029 }
3030 }
3031
3032 /* Set up .got offsets for local syms, and space for local dynamic
3033 relocs. */
3034 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3035 {
3036 bfd_signed_vma *local_got;
3037 bfd_signed_vma *end_local_got;
3038 union gotref *local_funcdesc, *end_local_funcdesc;
3039 char *local_got_type;
3040 bfd_size_type locsymcount;
3041 Elf_Internal_Shdr *symtab_hdr;
3042 asection *srel;
3043
3044 if (! is_sh_elf (ibfd))
3045 continue;
3046
3047 for (s = ibfd->sections; s != NULL; s = s->next)
3048 {
3049 struct elf_dyn_relocs *p;
3050
3051 for (p = ((struct elf_dyn_relocs *)
3052 elf_section_data (s)->local_dynrel);
3053 p != NULL;
3054 p = p->next)
3055 {
3056 if (! bfd_is_abs_section (p->sec)
3057 && bfd_is_abs_section (p->sec->output_section))
3058 {
3059 /* Input section has been discarded, either because
3060 it is a copy of a linkonce section or due to
3061 linker script /DISCARD/, so we'll be discarding
3062 the relocs too. */
3063 }
3064 else if (htab->vxworks_p
3065 && strcmp (p->sec->output_section->name,
3066 ".tls_vars") == 0)
3067 {
3068 /* Relocations in vxworks .tls_vars sections are
3069 handled specially by the loader. */
3070 }
3071 else if (p->count != 0)
3072 {
3073 srel = elf_section_data (p->sec)->sreloc;
3074 srel->size += p->count * sizeof (Elf32_External_Rela);
3075 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
3076 {
3077 info->flags |= DF_TEXTREL;
3078 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
3079 p->sec->owner, p->sec);
3080 }
3081
3082 /* If we need relocations, we do not need fixups. */
3083 if (htab->fdpic_p && !bfd_link_pic (info))
3084 htab->srofixup->size -= 4 * (p->count - p->pc_count);
3085 }
3086 }
3087 }
3088
3089 symtab_hdr = &elf_symtab_hdr (ibfd);
3090 locsymcount = symtab_hdr->sh_info;
3091 s = htab->root.sgot;
3092 srel = htab->root.srelgot;
3093
3094 local_got = elf_local_got_refcounts (ibfd);
3095 if (local_got)
3096 {
3097 end_local_got = local_got + locsymcount;
3098 local_got_type = sh_elf_local_got_type (ibfd);
3099 local_funcdesc = sh_elf_local_funcdesc (ibfd);
3100 for (; local_got < end_local_got; ++local_got)
3101 {
3102 if (*local_got > 0)
3103 {
3104 *local_got = s->size;
3105 s->size += 4;
3106 if (*local_got_type == GOT_TLS_GD)
3107 s->size += 4;
3108 if (bfd_link_pic (info))
3109 srel->size += sizeof (Elf32_External_Rela);
3110 else
3111 htab->srofixup->size += 4;
3112
3113 if (*local_got_type == GOT_FUNCDESC)
3114 {
3115 if (local_funcdesc == NULL)
3116 {
3117 bfd_size_type size;
3118
3119 size = locsymcount * sizeof (union gotref);
3120 local_funcdesc = (union gotref *) bfd_zalloc (ibfd,
3121 size);
3122 if (local_funcdesc == NULL)
3123 return FALSE;
3124 sh_elf_local_funcdesc (ibfd) = local_funcdesc;
3125 local_funcdesc += (local_got
3126 - elf_local_got_refcounts (ibfd));
3127 }
3128 local_funcdesc->refcount++;
3129 ++local_funcdesc;
3130 }
3131 }
3132 else
3133 *local_got = (bfd_vma) -1;
3134 ++local_got_type;
3135 }
3136 }
3137
3138 local_funcdesc = sh_elf_local_funcdesc (ibfd);
3139 if (local_funcdesc)
3140 {
3141 end_local_funcdesc = local_funcdesc + locsymcount;
3142
3143 for (; local_funcdesc < end_local_funcdesc; ++local_funcdesc)
3144 {
3145 if (local_funcdesc->refcount > 0)
3146 {
3147 local_funcdesc->offset = htab->sfuncdesc->size;
3148 htab->sfuncdesc->size += 8;
3149 if (!bfd_link_pic (info))
3150 htab->srofixup->size += 8;
3151 else
3152 htab->srelfuncdesc->size += sizeof (Elf32_External_Rela);
3153 }
3154 else
3155 local_funcdesc->offset = MINUS_ONE;
3156 }
3157 }
3158
3159 }
3160
3161 if (htab->tls_ldm_got.refcount > 0)
3162 {
3163 /* Allocate 2 got entries and 1 dynamic reloc for R_SH_TLS_LD_32
3164 relocs. */
3165 htab->tls_ldm_got.offset = htab->root.sgot->size;
3166 htab->root.sgot->size += 8;
3167 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
3168 }
3169 else
3170 htab->tls_ldm_got.offset = -1;
3171
3172 /* Only the reserved entries should be present. For FDPIC, they go at
3173 the end of .got.plt. */
3174 if (htab->fdpic_p)
3175 {
3176 BFD_ASSERT (htab->root.sgotplt && htab->root.sgotplt->size == 12);
3177 htab->root.sgotplt->size = 0;
3178 }
3179
3180 /* Allocate global sym .plt and .got entries, and space for global
3181 sym dynamic relocs. */
3182 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
3183
3184 /* Move the reserved entries and the _GLOBAL_OFFSET_TABLE_ symbol to the
3185 end of the FDPIC .got.plt. */
3186 if (htab->fdpic_p)
3187 {
3188 htab->root.hgot->root.u.def.value = htab->root.sgotplt->size;
3189 htab->root.sgotplt->size += 12;
3190 }
3191
3192 /* At the very end of the .rofixup section is a pointer to the GOT. */
3193 if (htab->fdpic_p && htab->srofixup != NULL)
3194 htab->srofixup->size += 4;
3195
3196 /* We now have determined the sizes of the various dynamic sections.
3197 Allocate memory for them. */
3198 relocs = FALSE;
3199 for (s = dynobj->sections; s != NULL; s = s->next)
3200 {
3201 if ((s->flags & SEC_LINKER_CREATED) == 0)
3202 continue;
3203
3204 if (s == htab->root.splt
3205 || s == htab->root.sgot
3206 || s == htab->root.sgotplt
3207 || s == htab->sfuncdesc
3208 || s == htab->srofixup
3209 || s == htab->sdynbss)
3210 {
3211 /* Strip this section if we don't need it; see the
3212 comment below. */
3213 }
3214 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3215 {
3216 if (s->size != 0 && s != htab->root.srelplt && s != htab->srelplt2)
3217 relocs = TRUE;
3218
3219 /* We use the reloc_count field as a counter if we need
3220 to copy relocs into the output file. */
3221 s->reloc_count = 0;
3222 }
3223 else
3224 {
3225 /* It's not one of our sections, so don't allocate space. */
3226 continue;
3227 }
3228
3229 if (s->size == 0)
3230 {
3231 /* If we don't need this section, strip it from the
3232 output file. This is mostly to handle .rela.bss and
3233 .rela.plt. We must create both sections in
3234 create_dynamic_sections, because they must be created
3235 before the linker maps input sections to output
3236 sections. The linker does that before
3237 adjust_dynamic_symbol is called, and it is that
3238 function which decides whether anything needs to go
3239 into these sections. */
3240
3241 s->flags |= SEC_EXCLUDE;
3242 continue;
3243 }
3244
3245 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3246 continue;
3247
3248 /* Allocate memory for the section contents. We use bfd_zalloc
3249 here in case unused entries are not reclaimed before the
3250 section's contents are written out. This should not happen,
3251 but this way if it does, we get a R_SH_NONE reloc instead
3252 of garbage. */
3253 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3254 if (s->contents == NULL)
3255 return FALSE;
3256 }
3257
3258 if (htab->root.dynamic_sections_created)
3259 {
3260 /* Add some entries to the .dynamic section. We fill in the
3261 values later, in sh_elf_finish_dynamic_sections, but we
3262 must add the entries now so that we get the correct size for
3263 the .dynamic section. The DT_DEBUG entry is filled in by the
3264 dynamic linker and used by the debugger. */
3265 #define add_dynamic_entry(TAG, VAL) \
3266 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3267
3268 if (bfd_link_executable (info))
3269 {
3270 if (! add_dynamic_entry (DT_DEBUG, 0))
3271 return FALSE;
3272 }
3273
3274 if (htab->root.splt->size != 0)
3275 {
3276 if (! add_dynamic_entry (DT_PLTGOT, 0)
3277 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
3278 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
3279 || ! add_dynamic_entry (DT_JMPREL, 0))
3280 return FALSE;
3281 }
3282 else if ((elf_elfheader (output_bfd)->e_flags & EF_SH_FDPIC))
3283 {
3284 if (! add_dynamic_entry (DT_PLTGOT, 0))
3285 return FALSE;
3286 }
3287
3288 if (relocs)
3289 {
3290 if (! add_dynamic_entry (DT_RELA, 0)
3291 || ! add_dynamic_entry (DT_RELASZ, 0)
3292 || ! add_dynamic_entry (DT_RELAENT,
3293 sizeof (Elf32_External_Rela)))
3294 return FALSE;
3295
3296 /* If any dynamic relocs apply to a read-only section,
3297 then we need a DT_TEXTREL entry. */
3298 if ((info->flags & DF_TEXTREL) == 0)
3299 elf_link_hash_traverse (&htab->root, maybe_set_textrel, info);
3300
3301 if ((info->flags & DF_TEXTREL) != 0)
3302 {
3303 if (! add_dynamic_entry (DT_TEXTREL, 0))
3304 return FALSE;
3305 }
3306 }
3307 if (htab->vxworks_p
3308 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3309 return FALSE;
3310 }
3311 #undef add_dynamic_entry
3312
3313 return TRUE;
3314 }
3315 \f
3316 /* Add a dynamic relocation to the SRELOC section. */
3317
3318 inline static bfd_vma
3319 sh_elf_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
3320 int reloc_type, long dynindx, bfd_vma addend)
3321 {
3322 Elf_Internal_Rela outrel;
3323 bfd_vma reloc_offset;
3324
3325 outrel.r_offset = offset;
3326 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
3327 outrel.r_addend = addend;
3328
3329 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rela);
3330 BFD_ASSERT (reloc_offset < sreloc->size);
3331 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3332 sreloc->contents + reloc_offset);
3333 sreloc->reloc_count++;
3334
3335 return reloc_offset;
3336 }
3337
3338 /* Add an FDPIC read-only fixup. */
3339
3340 inline static void
3341 sh_elf_add_rofixup (bfd *output_bfd, asection *srofixup, bfd_vma offset)
3342 {
3343 bfd_vma fixup_offset;
3344
3345 fixup_offset = srofixup->reloc_count++ * 4;
3346 BFD_ASSERT (fixup_offset < srofixup->size);
3347 bfd_put_32 (output_bfd, offset, srofixup->contents + fixup_offset);
3348 }
3349
3350 /* Return the offset of the generated .got section from the
3351 _GLOBAL_OFFSET_TABLE_ symbol. */
3352
3353 static bfd_signed_vma
3354 sh_elf_got_offset (struct elf_sh_link_hash_table *htab)
3355 {
3356 return (htab->root.sgot->output_offset - htab->root.sgotplt->output_offset
3357 - htab->root.hgot->root.u.def.value);
3358 }
3359
3360 /* Find the segment number in which OSEC, and output section, is
3361 located. */
3362
3363 static unsigned
3364 sh_elf_osec_to_segment (bfd *output_bfd, asection *osec)
3365 {
3366 Elf_Internal_Phdr *p = NULL;
3367
3368 if (output_bfd->xvec->flavour == bfd_target_elf_flavour
3369 /* PR ld/17110: Do not look for output segments in an input bfd. */
3370 && output_bfd->direction != read_direction)
3371 p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
3372
3373 /* FIXME: Nothing ever says what this index is relative to. The kernel
3374 supplies data in terms of the number of load segments but this is
3375 a phdr index and the first phdr may not be a load segment. */
3376 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
3377 }
3378
3379 static bfd_boolean
3380 sh_elf_osec_readonly_p (bfd *output_bfd, asection *osec)
3381 {
3382 unsigned seg = sh_elf_osec_to_segment (output_bfd, osec);
3383
3384 return (seg != (unsigned) -1
3385 && ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W));
3386 }
3387
3388 /* Generate the initial contents of a local function descriptor, along
3389 with any relocations or fixups required. */
3390 static bfd_boolean
3391 sh_elf_initialize_funcdesc (bfd *output_bfd,
3392 struct bfd_link_info *info,
3393 struct elf_link_hash_entry *h,
3394 bfd_vma offset,
3395 asection *section,
3396 bfd_vma value)
3397 {
3398 struct elf_sh_link_hash_table *htab;
3399 int dynindx;
3400 bfd_vma addr, seg;
3401
3402 htab = sh_elf_hash_table (info);
3403
3404 /* FIXME: The ABI says that the offset to the function goes in the
3405 descriptor, along with the segment index. We're RELA, so it could
3406 go in the reloc instead... */
3407
3408 if (h != NULL && SYMBOL_CALLS_LOCAL (info, h))
3409 {
3410 section = h->root.u.def.section;
3411 value = h->root.u.def.value;
3412 }
3413
3414 if (h == NULL || SYMBOL_CALLS_LOCAL (info, h))
3415 {
3416 dynindx = elf_section_data (section->output_section)->dynindx;
3417 addr = value + section->output_offset;
3418 seg = sh_elf_osec_to_segment (output_bfd, section->output_section);
3419 }
3420 else
3421 {
3422 BFD_ASSERT (h->dynindx != -1);
3423 dynindx = h->dynindx;
3424 addr = seg = 0;
3425 }
3426
3427 if (!bfd_link_pic (info) && SYMBOL_CALLS_LOCAL (info, h))
3428 {
3429 if (h == NULL || h->root.type != bfd_link_hash_undefweak)
3430 {
3431 sh_elf_add_rofixup (output_bfd, htab->srofixup,
3432 offset
3433 + htab->sfuncdesc->output_section->vma
3434 + htab->sfuncdesc->output_offset);
3435 sh_elf_add_rofixup (output_bfd, htab->srofixup,
3436 offset + 4
3437 + htab->sfuncdesc->output_section->vma
3438 + htab->sfuncdesc->output_offset);
3439 }
3440
3441 /* There are no dynamic relocations so fill in the final
3442 address and gp value (barring fixups). */
3443 addr += section->output_section->vma;
3444 seg = htab->root.hgot->root.u.def.value
3445 + htab->root.hgot->root.u.def.section->output_section->vma
3446 + htab->root.hgot->root.u.def.section->output_offset;
3447 }
3448 else
3449 sh_elf_add_dyn_reloc (output_bfd, htab->srelfuncdesc,
3450 offset
3451 + htab->sfuncdesc->output_section->vma
3452 + htab->sfuncdesc->output_offset,
3453 R_SH_FUNCDESC_VALUE, dynindx, 0);
3454
3455 bfd_put_32 (output_bfd, addr, htab->sfuncdesc->contents + offset);
3456 bfd_put_32 (output_bfd, seg, htab->sfuncdesc->contents + offset + 4);
3457
3458 return TRUE;
3459 }
3460
3461 /* Install a 20-bit movi20 field starting at ADDR, which occurs in OUTPUT_BFD.
3462 VALUE is the field's value. Return bfd_reloc_ok if successful or an error
3463 otherwise. */
3464
3465 static bfd_reloc_status_type
3466 install_movi20_field (bfd *output_bfd, unsigned long relocation,
3467 bfd *input_bfd, asection *input_section,
3468 bfd_byte *contents, bfd_vma offset)
3469 {
3470 unsigned long cur_val;
3471 bfd_byte *addr;
3472 bfd_reloc_status_type r;
3473
3474 if (offset > bfd_get_section_limit (input_bfd, input_section))
3475 return bfd_reloc_outofrange;
3476
3477 r = bfd_check_overflow (complain_overflow_signed, 20, 0,
3478 bfd_arch_bits_per_address (input_bfd), relocation);
3479 if (r != bfd_reloc_ok)
3480 return r;
3481
3482 addr = contents + offset;
3483 cur_val = bfd_get_16 (output_bfd, addr);
3484 bfd_put_16 (output_bfd, cur_val | ((relocation & 0xf0000) >> 12), addr);
3485 bfd_put_16 (output_bfd, relocation & 0xffff, addr + 2);
3486
3487 return bfd_reloc_ok;
3488 }
3489
3490 /* Relocate an SH ELF section. */
3491
3492 static bfd_boolean
3493 sh_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
3494 bfd *input_bfd, asection *input_section,
3495 bfd_byte *contents, Elf_Internal_Rela *relocs,
3496 Elf_Internal_Sym *local_syms,
3497 asection **local_sections)
3498 {
3499 struct elf_sh_link_hash_table *htab;
3500 Elf_Internal_Shdr *symtab_hdr;
3501 struct elf_link_hash_entry **sym_hashes;
3502 Elf_Internal_Rela *rel, *relend;
3503 bfd_vma *local_got_offsets;
3504 asection *sgot = NULL;
3505 asection *sgotplt = NULL;
3506 asection *splt = NULL;
3507 asection *sreloc = NULL;
3508 asection *srelgot = NULL;
3509 bfd_boolean is_vxworks_tls;
3510 unsigned isec_segment, got_segment, plt_segment, check_segment[2];
3511 bfd_boolean fdpic_p = FALSE;
3512
3513 BFD_ASSERT (is_sh_elf (input_bfd));
3514
3515 htab = sh_elf_hash_table (info);
3516 if (htab != NULL)
3517 {
3518 sgot = htab->root.sgot;
3519 sgotplt = htab->root.sgotplt;
3520 srelgot = htab->root.srelgot;
3521 splt = htab->root.splt;
3522 fdpic_p = htab->fdpic_p;
3523 }
3524 symtab_hdr = &elf_symtab_hdr (input_bfd);
3525 sym_hashes = elf_sym_hashes (input_bfd);
3526 local_got_offsets = elf_local_got_offsets (input_bfd);
3527
3528 isec_segment = sh_elf_osec_to_segment (output_bfd,
3529 input_section->output_section);
3530 if (fdpic_p && sgot)
3531 got_segment = sh_elf_osec_to_segment (output_bfd,
3532 sgot->output_section);
3533 else
3534 got_segment = -1;
3535 if (fdpic_p && splt)
3536 plt_segment = sh_elf_osec_to_segment (output_bfd,
3537 splt->output_section);
3538 else
3539 plt_segment = -1;
3540
3541 /* We have to handle relocations in vxworks .tls_vars sections
3542 specially, because the dynamic loader is 'weird'. */
3543 is_vxworks_tls = (htab && htab->vxworks_p && bfd_link_pic (info)
3544 && !strcmp (input_section->output_section->name,
3545 ".tls_vars"));
3546
3547 rel = relocs;
3548 relend = relocs + input_section->reloc_count;
3549 for (; rel < relend; rel++)
3550 {
3551 int r_type;
3552 reloc_howto_type *howto;
3553 unsigned long r_symndx;
3554 Elf_Internal_Sym *sym;
3555 asection *sec;
3556 struct elf_link_hash_entry *h;
3557 bfd_vma relocation;
3558 bfd_vma addend = (bfd_vma) 0;
3559 bfd_reloc_status_type r;
3560 int seen_stt_datalabel = 0;
3561 bfd_vma off;
3562 enum got_type got_type;
3563 const char *symname = NULL;
3564 bfd_boolean resolved_to_zero;
3565
3566 r_symndx = ELF32_R_SYM (rel->r_info);
3567
3568 r_type = ELF32_R_TYPE (rel->r_info);
3569
3570 /* Many of the relocs are only used for relaxing, and are
3571 handled entirely by the relaxation code. */
3572 if (r_type >= (int) R_SH_GNU_VTINHERIT
3573 && r_type <= (int) R_SH_LABEL)
3574 continue;
3575 if (r_type == (int) R_SH_NONE)
3576 continue;
3577
3578 if (r_type < 0
3579 || r_type >= R_SH_max
3580 || (r_type >= (int) R_SH_FIRST_INVALID_RELOC
3581 && r_type <= (int) R_SH_LAST_INVALID_RELOC)
3582 || (r_type >= (int) R_SH_FIRST_INVALID_RELOC_2
3583 && r_type <= (int) R_SH_LAST_INVALID_RELOC_2)
3584 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_3
3585 && r_type <= (int) R_SH_LAST_INVALID_RELOC_3)
3586 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_4
3587 && r_type <= (int) R_SH_LAST_INVALID_RELOC_4)
3588 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_5
3589 && r_type <= (int) R_SH_LAST_INVALID_RELOC_5)
3590 || ( r_type >= (int) R_SH_FIRST_INVALID_RELOC_6
3591 && r_type <= (int) R_SH_LAST_INVALID_RELOC_6))
3592 {
3593 bfd_set_error (bfd_error_bad_value);
3594 return FALSE;
3595 }
3596
3597 howto = get_howto_table (output_bfd) + r_type;
3598
3599 /* For relocs that aren't partial_inplace, we get the addend from
3600 the relocation. */
3601 if (! howto->partial_inplace)
3602 addend = rel->r_addend;
3603
3604 resolved_to_zero = FALSE;
3605 h = NULL;
3606 sym = NULL;
3607 sec = NULL;
3608 check_segment[0] = -1;
3609 check_segment[1] = -1;
3610 if (r_symndx < symtab_hdr->sh_info)
3611 {
3612 sym = local_syms + r_symndx;
3613 sec = local_sections[r_symndx];
3614
3615 symname = bfd_elf_string_from_elf_section
3616 (input_bfd, symtab_hdr->sh_link, sym->st_name);
3617 if (symname == NULL || *symname == '\0')
3618 symname = bfd_section_name (input_bfd, sec);
3619
3620 relocation = (sec->output_section->vma
3621 + sec->output_offset
3622 + sym->st_value);
3623 /* A local symbol never has STO_SH5_ISA32, so we don't need
3624 datalabel processing here. Make sure this does not change
3625 without notice. */
3626 if ((sym->st_other & STO_SH5_ISA32) != 0)
3627 (*info->callbacks->reloc_dangerous)
3628 (info,
3629 _("unexpected STO_SH5_ISA32 on local symbol is not handled"),
3630 input_bfd, input_section, rel->r_offset);
3631
3632 if (sec != NULL && discarded_section (sec))
3633 /* Handled below. */
3634 ;
3635 else if (bfd_link_relocatable (info))
3636 {
3637 /* This is a relocatable link. We don't have to change
3638 anything, unless the reloc is against a section symbol,
3639 in which case we have to adjust according to where the
3640 section symbol winds up in the output section. */
3641 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3642 {
3643 if (! howto->partial_inplace)
3644 {
3645 /* For relocations with the addend in the
3646 relocation, we need just to update the addend.
3647 All real relocs are of type partial_inplace; this
3648 code is mostly for completeness. */
3649 rel->r_addend += sec->output_offset;
3650
3651 continue;
3652 }
3653
3654 /* Relocs of type partial_inplace need to pick up the
3655 contents in the contents and add the offset resulting
3656 from the changed location of the section symbol.
3657 Using _bfd_final_link_relocate (e.g. goto
3658 final_link_relocate) here would be wrong, because
3659 relocations marked pc_relative would get the current
3660 location subtracted, and we must only do that at the
3661 final link. */
3662 r = _bfd_relocate_contents (howto, input_bfd,
3663 sec->output_offset
3664 + sym->st_value,
3665 contents + rel->r_offset);
3666 goto relocation_done;
3667 }
3668
3669 continue;
3670 }
3671 else if (! howto->partial_inplace)
3672 {
3673 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3674 addend = rel->r_addend;
3675 }
3676 else if ((sec->flags & SEC_MERGE)
3677 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3678 {
3679 asection *msec;
3680
3681 if (howto->rightshift || howto->src_mask != 0xffffffff)
3682 {
3683 _bfd_error_handler
3684 /* xgettext:c-format */
3685 (_("%pB(%pA+%#" PRIx64 "): "
3686 "%s relocation against SEC_MERGE section"),
3687 input_bfd, input_section,
3688 (uint64_t) rel->r_offset, howto->name);
3689 return FALSE;
3690 }
3691
3692 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3693 msec = sec;
3694 addend =
3695 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3696 - relocation;
3697 addend += msec->output_section->vma + msec->output_offset;
3698 bfd_put_32 (input_bfd, addend, contents + rel->r_offset);
3699 addend = 0;
3700 }
3701 }
3702 else
3703 {
3704 /* FIXME: Ought to make use of the RELOC_FOR_GLOBAL_SYMBOL macro. */
3705
3706 relocation = 0;
3707 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3708 symname = h->root.root.string;
3709 while (h->root.type == bfd_link_hash_indirect
3710 || h->root.type == bfd_link_hash_warning)
3711 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3712 if (h->root.type == bfd_link_hash_defined
3713 || h->root.type == bfd_link_hash_defweak)
3714 {
3715 bfd_boolean dyn;
3716
3717 dyn = htab ? htab->root.dynamic_sections_created : FALSE;
3718 sec = h->root.u.def.section;
3719 /* In these cases, we don't need the relocation value.
3720 We check specially because in some obscure cases
3721 sec->output_section will be NULL. */
3722 if (r_type == R_SH_GOTPC
3723 || r_type == R_SH_GOTPC_LOW16
3724 || r_type == R_SH_GOTPC_MEDLOW16
3725 || r_type == R_SH_GOTPC_MEDHI16
3726 || r_type == R_SH_GOTPC_HI16
3727 || ((r_type == R_SH_PLT32
3728 || r_type == R_SH_PLT_LOW16
3729 || r_type == R_SH_PLT_MEDLOW16
3730 || r_type == R_SH_PLT_MEDHI16
3731 || r_type == R_SH_PLT_HI16)
3732 && h->plt.offset != (bfd_vma) -1)
3733 || ((r_type == R_SH_GOT32
3734 || r_type == R_SH_GOT20
3735 || r_type == R_SH_GOTFUNCDESC
3736 || r_type == R_SH_GOTFUNCDESC20
3737 || r_type == R_SH_GOTOFFFUNCDESC
3738 || r_type == R_SH_GOTOFFFUNCDESC20
3739 || r_type == R_SH_FUNCDESC
3740 || r_type == R_SH_GOT_LOW16
3741 || r_type == R_SH_GOT_MEDLOW16
3742 || r_type == R_SH_GOT_MEDHI16
3743 || r_type == R_SH_GOT_HI16)
3744 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3745 bfd_link_pic (info),
3746 h)
3747 && (! bfd_link_pic (info)
3748 || (! info->symbolic && h->dynindx != -1)
3749 || !h->def_regular))
3750 /* The cases above are those in which relocation is
3751 overwritten in the switch block below. The cases
3752 below are those in which we must defer relocation
3753 to run-time, because we can't resolve absolute
3754 addresses when creating a shared library. */
3755 || (bfd_link_pic (info)
3756 && ((! info->symbolic && h->dynindx != -1)
3757 || !h->def_regular)
3758 && ((r_type == R_SH_DIR32
3759 && !h->forced_local)
3760 || (r_type == R_SH_REL32
3761 && !SYMBOL_CALLS_LOCAL (info, h)))
3762 && ((input_section->flags & SEC_ALLOC) != 0
3763 /* DWARF will emit R_SH_DIR32 relocations in its
3764 sections against symbols defined externally
3765 in shared libraries. We can't do anything
3766 with them here. */
3767 || ((input_section->flags & SEC_DEBUGGING) != 0
3768 && h->def_dynamic)))
3769 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3770 sections because such sections are not SEC_ALLOC and
3771 thus ld.so will not process them. */
3772 || (sec->output_section == NULL
3773 && ((input_section->flags & SEC_DEBUGGING) != 0
3774 && h->def_dynamic))
3775 || (sec->output_section == NULL
3776 && (sh_elf_hash_entry (h)->got_type == GOT_TLS_IE
3777 || sh_elf_hash_entry (h)->got_type == GOT_TLS_GD)))
3778 ;
3779 else if (sec->output_section != NULL)
3780 relocation = ((h->root.u.def.value
3781 + sec->output_section->vma
3782 + sec->output_offset)
3783 /* A STO_SH5_ISA32 causes a "bitor 1" to the
3784 symbol value, unless we've seen
3785 STT_DATALABEL on the way to it. */
3786 | ((h->other & STO_SH5_ISA32) != 0
3787 && ! seen_stt_datalabel));
3788 else if (!bfd_link_relocatable (info)
3789 && (_bfd_elf_section_offset (output_bfd, info,
3790 input_section,
3791 rel->r_offset)
3792 != (bfd_vma) -1))
3793 {
3794 _bfd_error_handler
3795 /* xgettext:c-format */
3796 (_("%pB(%pA+%#" PRIx64 "): "
3797 "unresolvable %s relocation against symbol `%s'"),
3798 input_bfd,
3799 input_section,
3800 (uint64_t) rel->r_offset,
3801 howto->name,
3802 h->root.root.string);
3803 return FALSE;
3804 }
3805 }
3806 else if (h->root.type == bfd_link_hash_undefweak)
3807 resolved_to_zero = UNDEFWEAK_NO_DYNAMIC_RELOC (info, h);
3808 else if (info->unresolved_syms_in_objects == RM_IGNORE
3809 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3810 ;
3811 else if (!bfd_link_relocatable (info))
3812 (*info->callbacks->undefined_symbol)
3813 (info, h->root.root.string, input_bfd,
3814 input_section, rel->r_offset,
3815 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
3816 || ELF_ST_VISIBILITY (h->other)));
3817 }
3818
3819 if (sec != NULL && discarded_section (sec))
3820 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3821 rel, 1, relend, howto, 0, contents);
3822
3823 if (bfd_link_relocatable (info))
3824 continue;
3825
3826 /* Check for inter-segment relocations in FDPIC files. Most
3827 relocations connect the relocation site to the location of
3828 the target symbol, but there are some exceptions below. */
3829 check_segment[0] = isec_segment;
3830 if (sec != NULL)
3831 check_segment[1] = sh_elf_osec_to_segment (output_bfd,
3832 sec->output_section);
3833 else
3834 check_segment[1] = -1;
3835
3836 switch ((int) r_type)
3837 {
3838 final_link_relocate:
3839 /* COFF relocs don't use the addend. The addend is used for
3840 R_SH_DIR32 to be compatible with other compilers. */
3841 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3842 contents, rel->r_offset,
3843 relocation, addend);
3844 break;
3845
3846 case R_SH_IND12W:
3847 goto final_link_relocate;
3848
3849 case R_SH_DIR8WPN:
3850 case R_SH_DIR8WPZ:
3851 case R_SH_DIR8WPL:
3852 /* If the reloc is against the start of this section, then
3853 the assembler has already taken care of it and the reloc
3854 is here only to assist in relaxing. If the reloc is not
3855 against the start of this section, then it's against an
3856 external symbol and we must deal with it ourselves. */
3857 if (input_section->output_section->vma + input_section->output_offset
3858 != relocation)
3859 {
3860 int disp = (relocation
3861 - input_section->output_section->vma
3862 - input_section->output_offset
3863 - rel->r_offset);
3864 int mask = 0;
3865 switch (r_type)
3866 {
3867 case R_SH_DIR8WPN:
3868 case R_SH_DIR8WPZ: mask = 1; break;
3869 case R_SH_DIR8WPL: mask = 3; break;
3870 default: mask = 0; break;
3871 }
3872 if (disp & mask)
3873 {
3874 _bfd_error_handler
3875 /* xgettext:c-format */
3876 (_("%pB: %#" PRIx64 ": fatal: "
3877 "unaligned branch target for relax-support relocation"),
3878 input_section->owner,
3879 (uint64_t) rel->r_offset);
3880 bfd_set_error (bfd_error_bad_value);
3881 return FALSE;
3882 }
3883 relocation -= 4;
3884 goto final_link_relocate;
3885 }
3886 r = bfd_reloc_ok;
3887 break;
3888
3889 default:
3890 bfd_set_error (bfd_error_bad_value);
3891 return FALSE;
3892
3893 case R_SH_DIR16:
3894 case R_SH_DIR8:
3895 case R_SH_DIR8U:
3896 case R_SH_DIR8S:
3897 case R_SH_DIR4U:
3898 goto final_link_relocate;
3899
3900 case R_SH_DIR8UL:
3901 case R_SH_DIR4UL:
3902 if (relocation & 3)
3903 {
3904 _bfd_error_handler
3905 /* xgettext:c-format */
3906 (_("%pB: %#" PRIx64 ": fatal: "
3907 "unaligned %s relocation %#" PRIx64),
3908 input_section->owner, (uint64_t) rel->r_offset,
3909 howto->name, (uint64_t) relocation);
3910 bfd_set_error (bfd_error_bad_value);
3911 return FALSE;
3912 }
3913 goto final_link_relocate;
3914
3915 case R_SH_DIR8UW:
3916 case R_SH_DIR8SW:
3917 case R_SH_DIR4UW:
3918 if (relocation & 1)
3919 {
3920 _bfd_error_handler
3921 /* xgettext:c-format */
3922 (_("%pB: %#" PRIx64 ": fatal: "
3923 "unaligned %s relocation %#" PRIx64 ""),
3924 input_section->owner,
3925 (uint64_t) rel->r_offset, howto->name,
3926 (uint64_t) relocation);
3927 bfd_set_error (bfd_error_bad_value);
3928 return FALSE;
3929 }
3930 goto final_link_relocate;
3931
3932 case R_SH_PSHA:
3933 if ((signed int)relocation < -32
3934 || (signed int)relocation > 32)
3935 {
3936 _bfd_error_handler
3937 /* xgettext:c-format */
3938 (_("%pB: %#" PRIx64 ": fatal: R_SH_PSHA relocation %" PRId64
3939 " not in range -32..32"),
3940 input_section->owner,
3941 (uint64_t) rel->r_offset,
3942 (int64_t) relocation);
3943 bfd_set_error (bfd_error_bad_value);
3944 return FALSE;
3945 }
3946 goto final_link_relocate;
3947
3948 case R_SH_PSHL:
3949 if ((signed int)relocation < -16
3950 || (signed int)relocation > 16)
3951 {
3952 _bfd_error_handler
3953 /* xgettext:c-format */
3954 (_("%pB: %#" PRIx64 ": fatal: R_SH_PSHL relocation %" PRId64
3955 " not in range -32..32"),
3956 input_section->owner,
3957 (uint64_t) rel->r_offset,
3958 (int64_t) relocation);
3959 bfd_set_error (bfd_error_bad_value);
3960 return FALSE;
3961 }
3962 goto final_link_relocate;
3963
3964 case R_SH_DIR32:
3965 case R_SH_REL32:
3966 if (bfd_link_pic (info)
3967 && (h == NULL
3968 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3969 && !resolved_to_zero)
3970 || h->root.type != bfd_link_hash_undefweak)
3971 && r_symndx != STN_UNDEF
3972 && (input_section->flags & SEC_ALLOC) != 0
3973 && !is_vxworks_tls
3974 && (r_type == R_SH_DIR32
3975 || !SYMBOL_CALLS_LOCAL (info, h)))
3976 {
3977 Elf_Internal_Rela outrel;
3978 bfd_byte *loc;
3979 bfd_boolean skip, relocate;
3980
3981 /* When generating a shared object, these relocations
3982 are copied into the output file to be resolved at run
3983 time. */
3984
3985 if (sreloc == NULL)
3986 {
3987 sreloc = _bfd_elf_get_dynamic_reloc_section
3988 (input_bfd, input_section, /*rela?*/ TRUE);
3989 if (sreloc == NULL)
3990 return FALSE;
3991 }
3992
3993 skip = FALSE;
3994 relocate = FALSE;
3995
3996 outrel.r_offset =
3997 _bfd_elf_section_offset (output_bfd, info, input_section,
3998 rel->r_offset);
3999 if (outrel.r_offset == (bfd_vma) -1)
4000 skip = TRUE;
4001 else if (outrel.r_offset == (bfd_vma) -2)
4002 skip = TRUE, relocate = TRUE;
4003 outrel.r_offset += (input_section->output_section->vma
4004 + input_section->output_offset);
4005
4006 if (skip)
4007 memset (&outrel, 0, sizeof outrel);
4008 else if (r_type == R_SH_REL32)
4009 {
4010 BFD_ASSERT (h != NULL && h->dynindx != -1);
4011 outrel.r_info = ELF32_R_INFO (h->dynindx, R_SH_REL32);
4012 outrel.r_addend
4013 = (howto->partial_inplace
4014 ? bfd_get_32 (input_bfd, contents + rel->r_offset)
4015 : addend);
4016 }
4017 else if (fdpic_p
4018 && (h == NULL
4019 || ((info->symbolic || h->dynindx == -1)
4020 && h->def_regular)))
4021 {
4022 int dynindx;
4023
4024 BFD_ASSERT (sec != NULL);
4025 BFD_ASSERT (sec->output_section != NULL);
4026 dynindx = elf_section_data (sec->output_section)->dynindx;
4027 outrel.r_info = ELF32_R_INFO (dynindx, R_SH_DIR32);
4028 outrel.r_addend = relocation;
4029 outrel.r_addend
4030 += (howto->partial_inplace
4031 ? bfd_get_32 (input_bfd, contents + rel->r_offset)
4032 : addend);
4033 outrel.r_addend -= sec->output_section->vma;
4034 }
4035 else
4036 {
4037 /* h->dynindx may be -1 if this symbol was marked to
4038 become local. */
4039 if (h == NULL
4040 || ((info->symbolic || h->dynindx == -1)
4041 && h->def_regular))
4042 {
4043 relocate = howto->partial_inplace;
4044 outrel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
4045 }
4046 else
4047 {
4048 BFD_ASSERT (h->dynindx != -1);
4049 outrel.r_info = ELF32_R_INFO (h->dynindx, R_SH_DIR32);
4050 }
4051 outrel.r_addend = relocation;
4052 outrel.r_addend
4053 += (howto->partial_inplace
4054 ? bfd_get_32 (input_bfd, contents + rel->r_offset)
4055 : addend);
4056 }
4057
4058 loc = sreloc->contents;
4059 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4060 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4061
4062 check_segment[0] = check_segment[1] = -1;
4063
4064 /* If this reloc is against an external symbol, we do
4065 not want to fiddle with the addend. Otherwise, we
4066 need to include the symbol value so that it becomes
4067 an addend for the dynamic reloc. */
4068 if (! relocate)
4069 continue;
4070 }
4071 else if (fdpic_p && !bfd_link_pic (info)
4072 && r_type == R_SH_DIR32
4073 && (input_section->flags & SEC_ALLOC) != 0)
4074 {
4075 bfd_vma offset;
4076
4077 BFD_ASSERT (htab);
4078
4079 if (sh_elf_osec_readonly_p (output_bfd,
4080 input_section->output_section))
4081 {
4082 _bfd_error_handler
4083 /* xgettext:c-format */
4084 (_("%pB(%pA+%#" PRIx64 "): "
4085 "cannot emit fixup to `%s' in read-only section"),
4086 input_bfd,
4087 input_section,
4088 (uint64_t) rel->r_offset,
4089 symname);
4090 return FALSE;
4091 }
4092
4093 offset = _bfd_elf_section_offset (output_bfd, info,
4094 input_section, rel->r_offset);
4095 if (offset != (bfd_vma)-1)
4096 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4097 input_section->output_section->vma
4098 + input_section->output_offset
4099 + rel->r_offset);
4100
4101 check_segment[0] = check_segment[1] = -1;
4102 }
4103 /* We don't want warnings for non-NULL tests on undefined weak
4104 symbols. */
4105 else if (r_type == R_SH_REL32
4106 && h
4107 && h->root.type == bfd_link_hash_undefweak)
4108 check_segment[0] = check_segment[1] = -1;
4109 goto final_link_relocate;
4110
4111 case R_SH_GOTPLT32:
4112 /* Relocation is to the entry for this symbol in the
4113 procedure linkage table. */
4114
4115 if (h == NULL
4116 || h->forced_local
4117 || ! bfd_link_pic (info)
4118 || info->symbolic
4119 || h->dynindx == -1
4120 || h->plt.offset == (bfd_vma) -1
4121 || h->got.offset != (bfd_vma) -1)
4122 goto force_got;
4123
4124 /* Relocation is to the entry for this symbol in the global
4125 offset table extension for the procedure linkage table. */
4126
4127 BFD_ASSERT (htab);
4128 BFD_ASSERT (sgotplt != NULL);
4129 relocation = (sgotplt->output_offset
4130 + (get_plt_index (htab->plt_info, h->plt.offset)
4131 + 3) * 4);
4132
4133 #ifdef GOT_BIAS
4134 relocation -= GOT_BIAS;
4135 #endif
4136
4137 goto final_link_relocate;
4138
4139 force_got:
4140 case R_SH_GOT32:
4141 case R_SH_GOT20:
4142 /* Relocation is to the entry for this symbol in the global
4143 offset table. */
4144
4145 BFD_ASSERT (htab);
4146 BFD_ASSERT (sgot != NULL);
4147 check_segment[0] = check_segment[1] = -1;
4148
4149 if (h != NULL)
4150 {
4151 bfd_boolean dyn;
4152
4153 off = h->got.offset;
4154 BFD_ASSERT (off != (bfd_vma) -1);
4155
4156 dyn = htab->root.dynamic_sections_created;
4157 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4158 bfd_link_pic (info),
4159 h)
4160 || (bfd_link_pic (info)
4161 && SYMBOL_REFERENCES_LOCAL (info, h))
4162 || ((ELF_ST_VISIBILITY (h->other)
4163 || resolved_to_zero)
4164 && h->root.type == bfd_link_hash_undefweak))
4165 {
4166 /* This is actually a static link, or it is a
4167 -Bsymbolic link and the symbol is defined
4168 locally, or the symbol was forced to be local
4169 because of a version file. We must initialize
4170 this entry in the global offset table. Since the
4171 offset must always be a multiple of 4, we use the
4172 least significant bit to record whether we have
4173 initialized it already.
4174
4175 When doing a dynamic link, we create a .rela.got
4176 relocation entry to initialize the value. This
4177 is done in the finish_dynamic_symbol routine. */
4178 if ((off & 1) != 0)
4179 off &= ~1;
4180 else
4181 {
4182 bfd_put_32 (output_bfd, relocation,
4183 sgot->contents + off);
4184 h->got.offset |= 1;
4185
4186 /* If we initialize the GOT entry here with a valid
4187 symbol address, also add a fixup. */
4188 if (fdpic_p && !bfd_link_pic (info)
4189 && sh_elf_hash_entry (h)->got_type == GOT_NORMAL
4190 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4191 || h->root.type != bfd_link_hash_undefweak))
4192 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4193 sgot->output_section->vma
4194 + sgot->output_offset
4195 + off);
4196 }
4197 }
4198
4199 relocation = sh_elf_got_offset (htab) + off;
4200 }
4201 else
4202 {
4203 BFD_ASSERT (local_got_offsets != NULL
4204 && local_got_offsets[r_symndx] != (bfd_vma) -1);
4205
4206 off = local_got_offsets[r_symndx];
4207
4208 /* The offset must always be a multiple of 4. We use
4209 the least significant bit to record whether we have
4210 already generated the necessary reloc. */
4211 if ((off & 1) != 0)
4212 off &= ~1;
4213 else
4214 {
4215 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
4216
4217 if (bfd_link_pic (info))
4218 {
4219 Elf_Internal_Rela outrel;
4220 bfd_byte *loc;
4221
4222 outrel.r_offset = (sgot->output_section->vma
4223 + sgot->output_offset
4224 + off);
4225 if (fdpic_p)
4226 {
4227 int dynindx
4228 = elf_section_data (sec->output_section)->dynindx;
4229 outrel.r_info = ELF32_R_INFO (dynindx, R_SH_DIR32);
4230 outrel.r_addend = relocation;
4231 outrel.r_addend -= sec->output_section->vma;
4232 }
4233 else
4234 {
4235 outrel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
4236 outrel.r_addend = relocation;
4237 }
4238 loc = srelgot->contents;
4239 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4240 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4241 }
4242 else if (fdpic_p
4243 && (sh_elf_local_got_type (input_bfd) [r_symndx]
4244 == GOT_NORMAL))
4245 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4246 sgot->output_section->vma
4247 + sgot->output_offset
4248 + off);
4249
4250 local_got_offsets[r_symndx] |= 1;
4251 }
4252
4253 relocation = sh_elf_got_offset (htab) + off;
4254 }
4255
4256 #ifdef GOT_BIAS
4257 relocation -= GOT_BIAS;
4258 #endif
4259
4260 if (r_type == R_SH_GOT20)
4261 {
4262 r = install_movi20_field (output_bfd, relocation + addend,
4263 input_bfd, input_section, contents,
4264 rel->r_offset);
4265 break;
4266 }
4267 else
4268 goto final_link_relocate;
4269
4270 case R_SH_GOTOFF:
4271 case R_SH_GOTOFF20:
4272 /* GOTOFF relocations are relative to _GLOBAL_OFFSET_TABLE_, which
4273 we place at the start of the .got.plt section. This is the same
4274 as the start of the output .got section, unless there are function
4275 descriptors in front of it. */
4276 BFD_ASSERT (htab);
4277 BFD_ASSERT (sgotplt != NULL);
4278 check_segment[0] = got_segment;
4279 relocation -= sgotplt->output_section->vma + sgotplt->output_offset
4280 + htab->root.hgot->root.u.def.value;
4281
4282 #ifdef GOT_BIAS
4283 relocation -= GOT_BIAS;
4284 #endif
4285
4286 addend = rel->r_addend;
4287
4288 if (r_type == R_SH_GOTOFF20)
4289 {
4290 r = install_movi20_field (output_bfd, relocation + addend,
4291 input_bfd, input_section, contents,
4292 rel->r_offset);
4293 break;
4294 }
4295 else
4296 goto final_link_relocate;
4297
4298 case R_SH_GOTPC:
4299 /* Use global offset table as symbol value. */
4300
4301 BFD_ASSERT (sgotplt != NULL);
4302 relocation = sgotplt->output_section->vma + sgotplt->output_offset;
4303
4304 #ifdef GOT_BIAS
4305 relocation += GOT_BIAS;
4306 #endif
4307
4308 addend = rel->r_addend;
4309
4310 goto final_link_relocate;
4311
4312 case R_SH_PLT32:
4313 /* Relocation is to the entry for this symbol in the
4314 procedure linkage table. */
4315
4316 /* Resolve a PLT reloc against a local symbol directly,
4317 without using the procedure linkage table. */
4318 if (h == NULL)
4319 goto final_link_relocate;
4320
4321 /* We don't want to warn on calls to undefined weak symbols,
4322 as calls to them must be protected by non-NULL tests
4323 anyway, and unprotected calls would invoke undefined
4324 behavior. */
4325 if (h->root.type == bfd_link_hash_undefweak)
4326 check_segment[0] = check_segment[1] = -1;
4327
4328 if (h->forced_local)
4329 goto final_link_relocate;
4330
4331 if (h->plt.offset == (bfd_vma) -1)
4332 {
4333 /* We didn't make a PLT entry for this symbol. This
4334 happens when statically linking PIC code, or when
4335 using -Bsymbolic. */
4336 goto final_link_relocate;
4337 }
4338
4339 BFD_ASSERT (splt != NULL);
4340 check_segment[1] = plt_segment;
4341 relocation = (splt->output_section->vma
4342 + splt->output_offset
4343 + h->plt.offset);
4344
4345 addend = rel->r_addend;
4346
4347 goto final_link_relocate;
4348
4349 /* Relocation is to the canonical function descriptor for this
4350 symbol, possibly via the GOT. Initialize the GOT
4351 entry and function descriptor if necessary. */
4352 case R_SH_GOTFUNCDESC:
4353 case R_SH_GOTFUNCDESC20:
4354 case R_SH_FUNCDESC:
4355 {
4356 int dynindx = -1;
4357 asection *reloc_section;
4358 bfd_vma reloc_offset;
4359 int reloc_type = R_SH_FUNCDESC;
4360
4361 BFD_ASSERT (htab);
4362
4363 check_segment[0] = check_segment[1] = -1;
4364
4365 /* FIXME: See what FRV does for global symbols in the
4366 executable, with --export-dynamic. Do they need ld.so
4367 to allocate official descriptors? See what this code
4368 does. */
4369
4370 relocation = 0;
4371 addend = 0;
4372
4373 if (r_type == R_SH_FUNCDESC)
4374 {
4375 reloc_section = input_section;
4376 reloc_offset = rel->r_offset;
4377 }
4378 else
4379 {
4380 reloc_section = sgot;
4381
4382 if (h != NULL)
4383 reloc_offset = h->got.offset;
4384 else
4385 {
4386 BFD_ASSERT (local_got_offsets != NULL);
4387 reloc_offset = local_got_offsets[r_symndx];
4388 }
4389 BFD_ASSERT (reloc_offset != MINUS_ONE);
4390
4391 if (reloc_offset & 1)
4392 {
4393 reloc_offset &= ~1;
4394 goto funcdesc_done_got;
4395 }
4396 }
4397
4398 if (h && h->root.type == bfd_link_hash_undefweak
4399 && (SYMBOL_CALLS_LOCAL (info, h)
4400 || !htab->root.dynamic_sections_created))
4401 /* Undefined weak symbol which will not be dynamically
4402 resolved later; leave it at zero. */
4403 goto funcdesc_leave_zero;
4404 else if (SYMBOL_CALLS_LOCAL (info, h)
4405 && ! SYMBOL_FUNCDESC_LOCAL (info, h))
4406 {
4407 /* If the symbol needs a non-local function descriptor
4408 but binds locally (i.e., its visibility is
4409 protected), emit a dynamic relocation decayed to
4410 section+offset. This is an optimization; the dynamic
4411 linker would resolve our function descriptor request
4412 to our copy of the function anyway. */
4413 dynindx = elf_section_data (h->root.u.def.section
4414 ->output_section)->dynindx;
4415 relocation += h->root.u.def.section->output_offset
4416 + h->root.u.def.value;
4417 }
4418 else if (! SYMBOL_FUNCDESC_LOCAL (info, h))
4419 {
4420 /* If the symbol is dynamic and there will be dynamic
4421 symbol resolution because we are or are linked with a
4422 shared library, emit a FUNCDESC relocation such that
4423 the dynamic linker will allocate the function
4424 descriptor. */
4425 BFD_ASSERT (h->dynindx != -1);
4426 dynindx = h->dynindx;
4427 }
4428 else
4429 {
4430 bfd_vma offset;
4431
4432 /* Otherwise, we know we have a private function
4433 descriptor, so reference it directly. */
4434 reloc_type = R_SH_DIR32;
4435 dynindx = elf_section_data (htab->sfuncdesc
4436 ->output_section)->dynindx;
4437
4438 if (h)
4439 {
4440 offset = sh_elf_hash_entry (h)->funcdesc.offset;
4441 BFD_ASSERT (offset != MINUS_ONE);
4442 if ((offset & 1) == 0)
4443 {
4444 if (!sh_elf_initialize_funcdesc (output_bfd, info, h,
4445 offset, NULL, 0))
4446 return FALSE;
4447 sh_elf_hash_entry (h)->funcdesc.offset |= 1;
4448 }
4449 }
4450 else
4451 {
4452 union gotref *local_funcdesc;
4453
4454 local_funcdesc = sh_elf_local_funcdesc (input_bfd);
4455 offset = local_funcdesc[r_symndx].offset;
4456 BFD_ASSERT (offset != MINUS_ONE);
4457 if ((offset & 1) == 0)
4458 {
4459 if (!sh_elf_initialize_funcdesc (output_bfd, info, NULL,
4460 offset, sec,
4461 sym->st_value))
4462 return FALSE;
4463 local_funcdesc[r_symndx].offset |= 1;
4464 }
4465 }
4466
4467 relocation = htab->sfuncdesc->output_offset + (offset & ~1);
4468 }
4469
4470 if (!bfd_link_pic (info) && SYMBOL_FUNCDESC_LOCAL (info, h))
4471 {
4472 bfd_vma offset;
4473
4474 if (sh_elf_osec_readonly_p (output_bfd,
4475 reloc_section->output_section))
4476 {
4477 _bfd_error_handler
4478 /* xgettext:c-format */
4479 (_("%pB(%pA+%#" PRIx64 "): "
4480 "cannot emit fixup to `%s' in read-only section"),
4481 input_bfd,
4482 input_section,
4483 (uint64_t) rel->r_offset,
4484 symname);
4485 return FALSE;
4486 }
4487
4488 offset = _bfd_elf_section_offset (output_bfd, info,
4489 reloc_section, reloc_offset);
4490
4491 if (offset != (bfd_vma)-1)
4492 sh_elf_add_rofixup (output_bfd, htab->srofixup,
4493 offset
4494 + reloc_section->output_section->vma
4495 + reloc_section->output_offset);
4496 }
4497 else if ((reloc_section->output_section->flags
4498 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
4499 {
4500 bfd_vma offset;
4501
4502 if (sh_elf_osec_readonly_p (output_bfd,
4503 reloc_section->output_section))
4504 {
4505 info->callbacks->warning
4506 (info,
4507 _("cannot emit dynamic relocations in read-only section"),
4508 symname, input_bfd, reloc_section, reloc_offset);
4509 return FALSE;
4510 }
4511
4512 offset = _bfd_elf_section_offset (output_bfd, info,
4513 reloc_section, reloc_offset);
4514
4515 if (offset != (bfd_vma)-1)
4516 sh_elf_add_dyn_reloc (output_bfd, srelgot,
4517 offset
4518 + reloc_section->output_section->vma
4519 + reloc_section->output_offset,
4520 reloc_type, dynindx, relocation);
4521
4522 if (r_type == R_SH_FUNCDESC)
4523 {
4524 r = bfd_reloc_ok;
4525 break;
4526 }
4527 else
4528 {
4529 relocation = 0;
4530 goto funcdesc_leave_zero;
4531 }
4532 }
4533
4534 if (SYMBOL_FUNCDESC_LOCAL (info, h))
4535 relocation += htab->sfuncdesc->output_section->vma;
4536 funcdesc_leave_zero:
4537 if (r_type != R_SH_FUNCDESC)
4538 {
4539 bfd_put_32 (output_bfd, relocation,
4540 reloc_section->contents + reloc_offset);
4541 if (h != NULL)
4542 h->got.offset |= 1;
4543 else
4544 local_got_offsets[r_symndx] |= 1;
4545
4546 funcdesc_done_got:
4547
4548 relocation = sh_elf_got_offset (htab) + reloc_offset;
4549 #ifdef GOT_BIAS
4550 relocation -= GOT_BIAS;
4551 #endif
4552 }
4553 if (r_type == R_SH_GOTFUNCDESC20)
4554 {
4555 r = install_movi20_field (output_bfd, relocation + addend,
4556 input_bfd, input_section, contents,
4557 rel->r_offset);
4558 break;
4559 }
4560 else
4561 goto final_link_relocate;
4562 }
4563 break;
4564
4565 case R_SH_GOTOFFFUNCDESC:
4566 case R_SH_GOTOFFFUNCDESC20:
4567 /* FIXME: See R_SH_FUNCDESC comment about global symbols in the
4568 executable and --export-dynamic. If such symbols get
4569 ld.so-allocated descriptors we can not use R_SH_GOTOFFFUNCDESC
4570 for them. */
4571 BFD_ASSERT (htab);
4572
4573 check_segment[0] = check_segment[1] = -1;
4574 relocation = 0;
4575 addend = rel->r_addend;
4576
4577 if (h && (h->root.type == bfd_link_hash_undefweak
4578 || !SYMBOL_FUNCDESC_LOCAL (info, h)))
4579 {
4580 _bfd_error_handler
4581 /* xgettext:c-format */
4582 (_("%pB(%pA+%#" PRIx64 "): "
4583 "%s relocation against external symbol \"%s\""),
4584 input_bfd, input_section, (uint64_t) rel->r_offset,
4585 howto->name, h->root.root.string);
4586 return FALSE;
4587 }
4588 else
4589 {
4590 bfd_vma offset;
4591
4592 /* Otherwise, we know we have a private function
4593 descriptor, so reference it directly. */
4594 if (h)
4595 {
4596 offset = sh_elf_hash_entry (h)->funcdesc.offset;
4597 BFD_ASSERT (offset != MINUS_ONE);
4598 if ((offset & 1) == 0)
4599 {
4600 if (!sh_elf_initialize_funcdesc (output_bfd, info, h,
4601 offset, NULL, 0))
4602 return FALSE;
4603 sh_elf_hash_entry (h)->funcdesc.offset |= 1;
4604 }
4605 }
4606 else
4607 {
4608 union gotref *local_funcdesc;
4609
4610 local_funcdesc = sh_elf_local_funcdesc (input_bfd);
4611 offset = local_funcdesc[r_symndx].offset;
4612 BFD_ASSERT (offset != MINUS_ONE);
4613 if ((offset & 1) == 0)
4614 {
4615 if (!sh_elf_initialize_funcdesc (output_bfd, info, NULL,
4616 offset, sec,
4617 sym->st_value))
4618 return FALSE;
4619 local_funcdesc[r_symndx].offset |= 1;
4620 }
4621 }
4622
4623 relocation = htab->sfuncdesc->output_offset + (offset & ~1);
4624 }
4625
4626 relocation -= (htab->root.hgot->root.u.def.value
4627 + sgotplt->output_offset);
4628 #ifdef GOT_BIAS
4629 relocation -= GOT_BIAS;
4630 #endif
4631
4632 if (r_type == R_SH_GOTOFFFUNCDESC20)
4633 {
4634 r = install_movi20_field (output_bfd, relocation + addend,
4635 input_bfd, input_section, contents,
4636 rel->r_offset);
4637 break;
4638 }
4639 else
4640 goto final_link_relocate;
4641
4642 case R_SH_LOOP_START:
4643 {
4644 static bfd_vma start, end;
4645
4646 start = (relocation + rel->r_addend
4647 - (sec->output_section->vma + sec->output_offset));
4648 r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents,
4649 rel->r_offset, sec, start, end);
4650 break;
4651
4652 case R_SH_LOOP_END:
4653 end = (relocation + rel->r_addend
4654 - (sec->output_section->vma + sec->output_offset));
4655 r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents,
4656 rel->r_offset, sec, start, end);
4657 break;
4658 }
4659
4660 case R_SH_TLS_GD_32:
4661 case R_SH_TLS_IE_32:
4662 BFD_ASSERT (htab);
4663 check_segment[0] = check_segment[1] = -1;
4664 r_type = sh_elf_optimized_tls_reloc (info, r_type, h == NULL);
4665 got_type = GOT_UNKNOWN;
4666 if (h == NULL && local_got_offsets)
4667 got_type = sh_elf_local_got_type (input_bfd) [r_symndx];
4668 else if (h != NULL)
4669 {
4670 got_type = sh_elf_hash_entry (h)->got_type;
4671 if (! bfd_link_pic (info)
4672 && (h->dynindx == -1
4673 || h->def_regular))
4674 r_type = R_SH_TLS_LE_32;
4675 }
4676
4677 if (r_type == R_SH_TLS_GD_32 && got_type == GOT_TLS_IE)
4678 r_type = R_SH_TLS_IE_32;
4679
4680 if (r_type == R_SH_TLS_LE_32)
4681 {
4682 bfd_vma offset;
4683 unsigned short insn;
4684
4685 if (ELF32_R_TYPE (rel->r_info) == R_SH_TLS_GD_32)
4686 {
4687 /* GD->LE transition:
4688 mov.l 1f,r4; mova 2f,r0; mov.l 2f,r1; add r0,r1;
4689 jsr @r1; add r12,r4; bra 3f; nop; .align 2;
4690 1: .long x$TLSGD; 2: .long __tls_get_addr@PLT; 3:
4691 We change it into:
4692 mov.l 1f,r4; stc gbr,r0; add r4,r0; nop;
4693 nop; nop; ...
4694 1: .long x@TPOFF; 2: .long __tls_get_addr@PLT; 3:. */
4695
4696 offset = rel->r_offset;
4697 BFD_ASSERT (offset >= 16);
4698 /* Size of GD instructions is 16 or 18. */
4699 offset -= 16;
4700 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4701 if ((insn & 0xff00) == 0xc700)
4702 {
4703 BFD_ASSERT (offset >= 2);
4704 offset -= 2;
4705 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4706 }
4707
4708 BFD_ASSERT ((insn & 0xff00) == 0xd400);
4709 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4710 BFD_ASSERT ((insn & 0xff00) == 0xc700);
4711 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4712 BFD_ASSERT ((insn & 0xff00) == 0xd100);
4713 insn = bfd_get_16 (input_bfd, contents + offset + 6);
4714 BFD_ASSERT (insn == 0x310c);
4715 insn = bfd_get_16 (input_bfd, contents + offset + 8);
4716 BFD_ASSERT (insn == 0x410b);
4717 insn = bfd_get_16 (input_bfd, contents + offset + 10);
4718 BFD_ASSERT (insn == 0x34cc);
4719
4720 bfd_put_16 (output_bfd, 0x0012, contents + offset + 2);
4721 bfd_put_16 (output_bfd, 0x304c, contents + offset + 4);
4722 bfd_put_16 (output_bfd, 0x0009, contents + offset + 6);
4723 bfd_put_16 (output_bfd, 0x0009, contents + offset + 8);
4724 bfd_put_16 (output_bfd, 0x0009, contents + offset + 10);
4725 }
4726 else
4727 {
4728 int target;
4729
4730 /* IE->LE transition:
4731 mov.l 1f,r0; stc gbr,rN; mov.l @(r0,r12),rM;
4732 bra 2f; add ...; .align 2; 1: x@GOTTPOFF; 2:
4733 We change it into:
4734 mov.l .Ln,rM; stc gbr,rN; nop; ...;
4735 1: x@TPOFF; 2:. */
4736
4737 offset = rel->r_offset;
4738 BFD_ASSERT (offset >= 16);
4739 /* Size of IE instructions is 10 or 12. */
4740 offset -= 10;
4741 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4742 if ((insn & 0xf0ff) == 0x0012)
4743 {
4744 BFD_ASSERT (offset >= 2);
4745 offset -= 2;
4746 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4747 }
4748
4749 BFD_ASSERT ((insn & 0xff00) == 0xd000);
4750 target = insn & 0x00ff;
4751 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4752 BFD_ASSERT ((insn & 0xf0ff) == 0x0012);
4753 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4754 BFD_ASSERT ((insn & 0xf0ff) == 0x00ce);
4755 insn = 0xd000 | (insn & 0x0f00) | target;
4756 bfd_put_16 (output_bfd, insn, contents + offset + 0);
4757 bfd_put_16 (output_bfd, 0x0009, contents + offset + 4);
4758 }
4759
4760 bfd_put_32 (output_bfd, tpoff (info, relocation),
4761 contents + rel->r_offset);
4762 continue;
4763 }
4764
4765 if (sgot == NULL || sgotplt == NULL)
4766 abort ();
4767
4768 if (h != NULL)
4769 off = h->got.offset;
4770 else
4771 {
4772 if (local_got_offsets == NULL)
4773 abort ();
4774
4775 off = local_got_offsets[r_symndx];
4776 }
4777
4778 /* Relocate R_SH_TLS_IE_32 directly when statically linking. */
4779 if (r_type == R_SH_TLS_IE_32
4780 && ! htab->root.dynamic_sections_created)
4781 {
4782 off &= ~1;
4783 bfd_put_32 (output_bfd, tpoff (info, relocation),
4784 sgot->contents + off);
4785 bfd_put_32 (output_bfd, sh_elf_got_offset (htab) + off,
4786 contents + rel->r_offset);
4787 continue;
4788 }
4789
4790 if ((off & 1) != 0)
4791 off &= ~1;
4792 else
4793 {
4794 Elf_Internal_Rela outrel;
4795 bfd_byte *loc;
4796 int dr_type, indx;
4797
4798 outrel.r_offset = (sgot->output_section->vma
4799 + sgot->output_offset + off);
4800
4801 if (h == NULL || h->dynindx == -1)
4802 indx = 0;
4803 else
4804 indx = h->dynindx;
4805
4806 dr_type = (r_type == R_SH_TLS_GD_32 ? R_SH_TLS_DTPMOD32 :
4807 R_SH_TLS_TPOFF32);
4808 if (dr_type == R_SH_TLS_TPOFF32 && indx == 0)
4809 outrel.r_addend = relocation - dtpoff_base (info);
4810 else
4811 outrel.r_addend = 0;
4812 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4813 loc = srelgot->contents;
4814 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4815 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4816
4817 if (r_type == R_SH_TLS_GD_32)
4818 {
4819 if (indx == 0)
4820 {
4821 bfd_put_32 (output_bfd,
4822 relocation - dtpoff_base (info),
4823 sgot->contents + off + 4);
4824 }
4825 else
4826 {
4827 outrel.r_info = ELF32_R_INFO (indx,
4828 R_SH_TLS_DTPOFF32);
4829 outrel.r_offset += 4;
4830 outrel.r_addend = 0;
4831 srelgot->reloc_count++;
4832 loc += sizeof (Elf32_External_Rela);
4833 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4834 }
4835 }
4836
4837 if (h != NULL)
4838 h->got.offset |= 1;
4839 else
4840 local_got_offsets[r_symndx] |= 1;
4841 }
4842
4843 if (off >= (bfd_vma) -2)
4844 abort ();
4845
4846 if (r_type == (int) ELF32_R_TYPE (rel->r_info))
4847 relocation = sh_elf_got_offset (htab) + off;
4848 else
4849 {
4850 bfd_vma offset;
4851 unsigned short insn;
4852
4853 /* GD->IE transition:
4854 mov.l 1f,r4; mova 2f,r0; mov.l 2f,r1; add r0,r1;
4855 jsr @r1; add r12,r4; bra 3f; nop; .align 2;
4856 1: .long x$TLSGD; 2: .long __tls_get_addr@PLT; 3:
4857 We change it into:
4858 mov.l 1f,r0; stc gbr,r4; mov.l @(r0,r12),r0; add r4,r0;
4859 nop; nop; bra 3f; nop; .align 2;
4860 1: .long x@TPOFF; 2:...; 3:. */
4861
4862 offset = rel->r_offset;
4863 BFD_ASSERT (offset >= 16);
4864 /* Size of GD instructions is 16 or 18. */
4865 offset -= 16;
4866 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4867 if ((insn & 0xff00) == 0xc700)
4868 {
4869 BFD_ASSERT (offset >= 2);
4870 offset -= 2;
4871 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4872 }
4873
4874 BFD_ASSERT ((insn & 0xff00) == 0xd400);
4875
4876 /* Replace mov.l 1f,R4 with mov.l 1f,r0. */
4877 bfd_put_16 (output_bfd, insn & 0xf0ff, contents + offset);
4878
4879 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4880 BFD_ASSERT ((insn & 0xff00) == 0xc700);
4881 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4882 BFD_ASSERT ((insn & 0xff00) == 0xd100);
4883 insn = bfd_get_16 (input_bfd, contents + offset + 6);
4884 BFD_ASSERT (insn == 0x310c);
4885 insn = bfd_get_16 (input_bfd, contents + offset + 8);
4886 BFD_ASSERT (insn == 0x410b);
4887 insn = bfd_get_16 (input_bfd, contents + offset + 10);
4888 BFD_ASSERT (insn == 0x34cc);
4889
4890 bfd_put_16 (output_bfd, 0x0412, contents + offset + 2);
4891 bfd_put_16 (output_bfd, 0x00ce, contents + offset + 4);
4892 bfd_put_16 (output_bfd, 0x304c, contents + offset + 6);
4893 bfd_put_16 (output_bfd, 0x0009, contents + offset + 8);
4894 bfd_put_16 (output_bfd, 0x0009, contents + offset + 10);
4895
4896 bfd_put_32 (output_bfd, sh_elf_got_offset (htab) + off,
4897 contents + rel->r_offset);
4898
4899 continue;
4900 }
4901
4902 addend = rel->r_addend;
4903
4904 goto final_link_relocate;
4905
4906 case R_SH_TLS_LD_32:
4907 BFD_ASSERT (htab);
4908 check_segment[0] = check_segment[1] = -1;
4909 if (! bfd_link_pic (info))
4910 {
4911 bfd_vma offset;
4912 unsigned short insn;
4913
4914 /* LD->LE transition:
4915 mov.l 1f,r4; mova 2f,r0; mov.l 2f,r1; add r0,r1;
4916 jsr @r1; add r12,r4; bra 3f; nop; .align 2;
4917 1: .long x$TLSLD; 2: .long __tls_get_addr@PLT; 3:
4918 We change it into:
4919 stc gbr,r0; nop; nop; nop;
4920 nop; nop; bra 3f; ...; 3:. */
4921
4922 offset = rel->r_offset;
4923 BFD_ASSERT (offset >= 16);
4924 /* Size of LD instructions is 16 or 18. */
4925 offset -= 16;
4926 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4927 if ((insn & 0xff00) == 0xc700)
4928 {
4929 BFD_ASSERT (offset >= 2);
4930 offset -= 2;
4931 insn = bfd_get_16 (input_bfd, contents + offset + 0);
4932 }
4933
4934 BFD_ASSERT ((insn & 0xff00) == 0xd400);
4935 insn = bfd_get_16 (input_bfd, contents + offset + 2);
4936 BFD_ASSERT ((insn & 0xff00) == 0xc700);
4937 insn = bfd_get_16 (input_bfd, contents + offset + 4);
4938 BFD_ASSERT ((insn & 0xff00) == 0xd100);
4939 insn = bfd_get_16 (input_bfd, contents + offset + 6);
4940 BFD_ASSERT (insn == 0x310c);
4941 insn = bfd_get_16 (input_bfd, contents + offset + 8);
4942 BFD_ASSERT (insn == 0x410b);
4943 insn = bfd_get_16 (input_bfd, contents + offset + 10);
4944 BFD_ASSERT (insn == 0x34cc);
4945
4946 bfd_put_16 (output_bfd, 0x0012, contents + offset + 0);
4947 bfd_put_16 (output_bfd, 0x0009, contents + offset + 2);
4948 bfd_put_16 (output_bfd, 0x0009, contents + offset + 4);
4949 bfd_put_16 (output_bfd, 0x0009, contents + offset + 6);
4950 bfd_put_16 (output_bfd, 0x0009, contents + offset + 8);
4951 bfd_put_16 (output_bfd, 0x0009, contents + offset + 10);
4952
4953 continue;
4954 }
4955
4956 if (sgot == NULL || sgotplt == NULL)
4957 abort ();
4958
4959 off = htab->tls_ldm_got.offset;
4960 if (off & 1)
4961 off &= ~1;
4962 else
4963 {
4964 Elf_Internal_Rela outrel;
4965 bfd_byte *loc;
4966
4967 outrel.r_offset = (sgot->output_section->vma
4968 + sgot->output_offset + off);
4969 outrel.r_addend = 0;
4970 outrel.r_info = ELF32_R_INFO (0, R_SH_TLS_DTPMOD32);
4971 loc = srelgot->contents;
4972 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4973 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4974 htab->tls_ldm_got.offset |= 1;
4975 }
4976
4977 relocation = sh_elf_got_offset (htab) + off;
4978 addend = rel->r_addend;
4979
4980 goto final_link_relocate;
4981
4982 case R_SH_TLS_LDO_32:
4983 check_segment[0] = check_segment[1] = -1;
4984 if (! bfd_link_pic (info))
4985 relocation = tpoff (info, relocation);
4986 else
4987 relocation -= dtpoff_base (info);
4988
4989 addend = rel->r_addend;
4990 goto final_link_relocate;
4991
4992 case R_SH_TLS_LE_32:
4993 {
4994 int indx;
4995 Elf_Internal_Rela outrel;
4996 bfd_byte *loc;
4997
4998 check_segment[0] = check_segment[1] = -1;
4999
5000 if (!bfd_link_dll (info))
5001 {
5002 relocation = tpoff (info, relocation);
5003 addend = rel->r_addend;
5004 goto final_link_relocate;
5005 }
5006
5007 if (sreloc == NULL)
5008 {
5009 sreloc = _bfd_elf_get_dynamic_reloc_section
5010 (input_bfd, input_section, /*rela?*/ TRUE);
5011 if (sreloc == NULL)
5012 return FALSE;
5013 }
5014
5015 if (h == NULL || h->dynindx == -1)
5016 indx = 0;
5017 else
5018 indx = h->dynindx;
5019
5020 outrel.r_offset = (input_section->output_section->vma
5021 + input_section->output_offset
5022 + rel->r_offset);
5023 outrel.r_info = ELF32_R_INFO (indx, R_SH_TLS_TPOFF32);
5024 if (indx == 0)
5025 outrel.r_addend = relocation - dtpoff_base (info);
5026 else
5027 outrel.r_addend = 0;
5028
5029 loc = sreloc->contents;
5030 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5031 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5032 continue;
5033 }
5034 }
5035
5036 relocation_done:
5037 if (fdpic_p && check_segment[0] != (unsigned) -1
5038 && check_segment[0] != check_segment[1])
5039 {
5040 /* We don't want duplicate errors for undefined symbols. */
5041 if (!h || h->root.type != bfd_link_hash_undefined)
5042 {
5043 if (bfd_link_pic (info))
5044 {
5045 info->callbacks->einfo
5046 /* xgettext:c-format */
5047 (_("%X%C: relocation to \"%s\" references a different segment\n"),
5048 input_bfd, input_section, rel->r_offset, symname);
5049 return FALSE;
5050 }
5051 else
5052 info->callbacks->einfo
5053 /* xgettext:c-format */
5054 (_("%C: warning: relocation to \"%s\" references a different segment\n"),
5055 input_bfd, input_section, rel->r_offset, symname);
5056 }
5057
5058 elf_elfheader (output_bfd)->e_flags |= EF_SH_PIC;
5059 }
5060
5061 if (r != bfd_reloc_ok)
5062 {
5063 switch (r)
5064 {
5065 default:
5066 case bfd_reloc_outofrange:
5067 abort ();
5068 case bfd_reloc_overflow:
5069 {
5070 const char *name;
5071
5072 if (h != NULL)
5073 name = NULL;
5074 else
5075 {
5076 name = (bfd_elf_string_from_elf_section
5077 (input_bfd, symtab_hdr->sh_link, sym->st_name));
5078 if (name == NULL)
5079 return FALSE;
5080 if (*name == '\0')
5081 name = bfd_section_name (input_bfd, sec);
5082 }
5083 (*info->callbacks->reloc_overflow)
5084 (info, (h ? &h->root : NULL), name, howto->name,
5085 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5086 }
5087 break;
5088 }
5089 }
5090 }
5091
5092 return TRUE;
5093 }
5094
5095 /* This is a version of bfd_generic_get_relocated_section_contents
5096 which uses sh_elf_relocate_section. */
5097
5098 static bfd_byte *
5099 sh_elf_get_relocated_section_contents (bfd *output_bfd,
5100 struct bfd_link_info *link_info,
5101 struct bfd_link_order *link_order,
5102 bfd_byte *data,
5103 bfd_boolean relocatable,
5104 asymbol **symbols)
5105 {
5106 Elf_Internal_Shdr *symtab_hdr;
5107 asection *input_section = link_order->u.indirect.section;
5108 bfd *input_bfd = input_section->owner;
5109 asection **sections = NULL;
5110 Elf_Internal_Rela *internal_relocs = NULL;
5111 Elf_Internal_Sym *isymbuf = NULL;
5112
5113 /* We only need to handle the case of relaxing, or of having a
5114 particular set of section contents, specially. */
5115 if (relocatable
5116 || elf_section_data (input_section)->this_hdr.contents == NULL)
5117 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
5118 link_order, data,
5119 relocatable,
5120 symbols);
5121
5122 symtab_hdr = &elf_symtab_hdr (input_bfd);
5123
5124 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
5125 (size_t) input_section->size);
5126
5127 if ((input_section->flags & SEC_RELOC) != 0
5128 && input_section->reloc_count > 0)
5129 {
5130 asection **secpp;
5131 Elf_Internal_Sym *isym, *isymend;
5132 bfd_size_type amt;
5133
5134 internal_relocs = (_bfd_elf_link_read_relocs
5135 (input_bfd, input_section, NULL,
5136 (Elf_Internal_Rela *) NULL, FALSE));
5137 if (internal_relocs == NULL)
5138 goto error_return;
5139
5140 if (symtab_hdr->sh_info != 0)
5141 {
5142 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5143 if (isymbuf == NULL)
5144 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
5145 symtab_hdr->sh_info, 0,
5146 NULL, NULL, NULL);
5147 if (isymbuf == NULL)
5148 goto error_return;
5149 }
5150
5151 amt = symtab_hdr->sh_info;
5152 amt *= sizeof (asection *);
5153 sections = (asection **) bfd_malloc (amt);
5154 if (sections == NULL && amt != 0)
5155 goto error_return;
5156
5157 isymend = isymbuf + symtab_hdr->sh_info;
5158 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
5159 {
5160 asection *isec;
5161
5162 if (isym->st_shndx == SHN_UNDEF)
5163 isec = bfd_und_section_ptr;
5164 else if (isym->st_shndx == SHN_ABS)
5165 isec = bfd_abs_section_ptr;
5166 else if (isym->st_shndx == SHN_COMMON)
5167 isec = bfd_com_section_ptr;
5168 else
5169 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
5170
5171 *secpp = isec;
5172 }
5173
5174 if (! sh_elf_relocate_section (output_bfd, link_info, input_bfd,
5175 input_section, data, internal_relocs,
5176 isymbuf, sections))
5177 goto error_return;
5178
5179 if (sections != NULL)
5180 free (sections);
5181 if (isymbuf != NULL
5182 && symtab_hdr->contents != (unsigned char *) isymbuf)
5183 free (isymbuf);
5184 if (elf_section_data (input_section)->relocs != internal_relocs)
5185 free (internal_relocs);
5186 }
5187
5188 return data;
5189
5190 error_return:
5191 if (sections != NULL)
5192 free (sections);
5193 if (isymbuf != NULL
5194 && symtab_hdr->contents != (unsigned char *) isymbuf)
5195 free (isymbuf);
5196 if (internal_relocs != NULL
5197 && elf_section_data (input_section)->relocs != internal_relocs)
5198 free (internal_relocs);
5199 return NULL;
5200 }
5201
5202 /* Return the base VMA address which should be subtracted from real addresses
5203 when resolving @dtpoff relocation.
5204 This is PT_TLS segment p_vaddr. */
5205
5206 static bfd_vma
5207 dtpoff_base (struct bfd_link_info *info)
5208 {
5209 /* If tls_sec is NULL, we should have signalled an error already. */
5210 if (elf_hash_table (info)->tls_sec == NULL)
5211 return 0;
5212 return elf_hash_table (info)->tls_sec->vma;
5213 }
5214
5215 /* Return the relocation value for R_SH_TLS_TPOFF32.. */
5216
5217 static bfd_vma
5218 tpoff (struct bfd_link_info *info, bfd_vma address)
5219 {
5220 /* If tls_sec is NULL, we should have signalled an error already. */
5221 if (elf_hash_table (info)->tls_sec == NULL)
5222 return 0;
5223 /* SH TLS ABI is variant I and static TLS block start just after tcbhead
5224 structure which has 2 pointer fields. */
5225 return (address - elf_hash_table (info)->tls_sec->vma
5226 + align_power ((bfd_vma) 8,
5227 elf_hash_table (info)->tls_sec->alignment_power));
5228 }
5229
5230 static asection *
5231 sh_elf_gc_mark_hook (asection *sec,
5232 struct bfd_link_info *info,
5233 Elf_Internal_Rela *rel,
5234 struct elf_link_hash_entry *h,
5235 Elf_Internal_Sym *sym)
5236 {
5237 if (h != NULL)
5238 switch (ELF32_R_TYPE (rel->r_info))
5239 {
5240 case R_SH_GNU_VTINHERIT:
5241 case R_SH_GNU_VTENTRY:
5242 return NULL;
5243 }
5244
5245 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5246 }
5247
5248 /* Copy the extra info we tack onto an elf_link_hash_entry. */
5249
5250 static void
5251 sh_elf_copy_indirect_symbol (struct bfd_link_info *info,
5252 struct elf_link_hash_entry *dir,
5253 struct elf_link_hash_entry *ind)
5254 {
5255 struct elf_sh_link_hash_entry *edir, *eind;
5256
5257 edir = (struct elf_sh_link_hash_entry *) dir;
5258 eind = (struct elf_sh_link_hash_entry *) ind;
5259
5260 if (eind->dyn_relocs != NULL)
5261 {
5262 if (edir->dyn_relocs != NULL)
5263 {
5264 struct elf_dyn_relocs **pp;
5265 struct elf_dyn_relocs *p;
5266
5267 /* Add reloc counts against the indirect sym to the direct sym
5268 list. Merge any entries against the same section. */
5269 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
5270 {
5271 struct elf_dyn_relocs *q;
5272
5273 for (q = edir->dyn_relocs; q != NULL; q = q->next)
5274 if (q->sec == p->sec)
5275 {
5276 q->pc_count += p->pc_count;
5277 q->count += p->count;
5278 *pp = p->next;
5279 break;
5280 }
5281 if (q == NULL)
5282 pp = &p->next;
5283 }
5284 *pp = edir->dyn_relocs;
5285 }
5286
5287 edir->dyn_relocs = eind->dyn_relocs;
5288 eind->dyn_relocs = NULL;
5289 }
5290 edir->gotplt_refcount = eind->gotplt_refcount;
5291 eind->gotplt_refcount = 0;
5292 edir->funcdesc.refcount += eind->funcdesc.refcount;
5293 eind->funcdesc.refcount = 0;
5294 edir->abs_funcdesc_refcount += eind->abs_funcdesc_refcount;
5295 eind->abs_funcdesc_refcount = 0;
5296
5297 if (ind->root.type == bfd_link_hash_indirect
5298 && dir->got.refcount <= 0)
5299 {
5300 edir->got_type = eind->got_type;
5301 eind->got_type = GOT_UNKNOWN;
5302 }
5303
5304 if (ind->root.type != bfd_link_hash_indirect
5305 && dir->dynamic_adjusted)
5306 {
5307 /* If called to transfer flags for a weakdef during processing
5308 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
5309 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
5310 if (dir->versioned != versioned_hidden)
5311 dir->ref_dynamic |= ind->ref_dynamic;
5312 dir->ref_regular |= ind->ref_regular;
5313 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
5314 dir->needs_plt |= ind->needs_plt;
5315 }
5316 else
5317 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
5318 }
5319
5320 static int
5321 sh_elf_optimized_tls_reloc (struct bfd_link_info *info, int r_type,
5322 int is_local)
5323 {
5324 if (bfd_link_pic (info))
5325 return r_type;
5326
5327 switch (r_type)
5328 {
5329 case R_SH_TLS_GD_32:
5330 case R_SH_TLS_IE_32:
5331 if (is_local)
5332 return R_SH_TLS_LE_32;
5333 return R_SH_TLS_IE_32;
5334 case R_SH_TLS_LD_32:
5335 return R_SH_TLS_LE_32;
5336 }
5337
5338 return r_type;
5339 }
5340
5341 /* Look through the relocs for a section during the first phase.
5342 Since we don't do .gots or .plts, we just need to consider the
5343 virtual table relocs for gc. */
5344
5345 static bfd_boolean
5346 sh_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
5347 const Elf_Internal_Rela *relocs)
5348 {
5349 Elf_Internal_Shdr *symtab_hdr;
5350 struct elf_link_hash_entry **sym_hashes;
5351 struct elf_sh_link_hash_table *htab;
5352 const Elf_Internal_Rela *rel;
5353 const Elf_Internal_Rela *rel_end;
5354 asection *sreloc;
5355 unsigned int r_type;
5356 enum got_type got_type, old_got_type;
5357
5358 sreloc = NULL;
5359
5360 if (bfd_link_relocatable (info))
5361 return TRUE;
5362
5363 /* Don't do anything special with non-loaded, non-alloced sections.
5364 In particular, any relocs in such sections should not affect GOT
5365 and PLT reference counting (ie. we don't allow them to create GOT
5366 or PLT entries), there's no possibility or desire to optimize TLS
5367 relocs, and there's not much point in propagating relocs to shared
5368 libs that the dynamic linker won't relocate. */
5369 if ((sec->flags & SEC_ALLOC) == 0)
5370 return TRUE;
5371
5372 BFD_ASSERT (is_sh_elf (abfd));
5373
5374 symtab_hdr = &elf_symtab_hdr (abfd);
5375 sym_hashes = elf_sym_hashes (abfd);
5376
5377 htab = sh_elf_hash_table (info);
5378 if (htab == NULL)
5379 return FALSE;
5380
5381 rel_end = relocs + sec->reloc_count;
5382 for (rel = relocs; rel < rel_end; rel++)
5383 {
5384 struct elf_link_hash_entry *h;
5385 unsigned long r_symndx;
5386
5387 r_symndx = ELF32_R_SYM (rel->r_info);
5388 r_type = ELF32_R_TYPE (rel->r_info);
5389
5390 if (r_symndx < symtab_hdr->sh_info)
5391 h = NULL;
5392 else
5393 {
5394 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5395 while (h->root.type == bfd_link_hash_indirect
5396 || h->root.type == bfd_link_hash_warning)
5397 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5398 }
5399
5400 r_type = sh_elf_optimized_tls_reloc (info, r_type, h == NULL);
5401 if (! bfd_link_pic (info)
5402 && r_type == R_SH_TLS_IE_32
5403 && h != NULL
5404 && h->root.type != bfd_link_hash_undefined
5405 && h->root.type != bfd_link_hash_undefweak
5406 && (h->dynindx == -1
5407 || h->def_regular))
5408 r_type = R_SH_TLS_LE_32;
5409
5410 if (htab->fdpic_p)
5411 switch (r_type)
5412 {
5413 case R_SH_GOTOFFFUNCDESC:
5414 case R_SH_GOTOFFFUNCDESC20:
5415 case R_SH_FUNCDESC:
5416 case R_SH_GOTFUNCDESC:
5417 case R_SH_GOTFUNCDESC20:
5418 if (h != NULL)
5419 {
5420 if (h->dynindx == -1)
5421 switch (ELF_ST_VISIBILITY (h->other))
5422 {
5423 case STV_INTERNAL:
5424 case STV_HIDDEN:
5425 break;
5426 default:
5427 bfd_elf_link_record_dynamic_symbol (info, h);
5428 break;
5429 }
5430 }
5431 break;
5432 }
5433
5434 /* Some relocs require a global offset table. */
5435 if (htab->root.sgot == NULL)
5436 {
5437 switch (r_type)
5438 {
5439 case R_SH_DIR32:
5440 /* This may require an rofixup. */
5441 if (!htab->fdpic_p)
5442 break;
5443 /* Fall through. */
5444 case R_SH_GOTPLT32:
5445 case R_SH_GOT32:
5446 case R_SH_GOT20:
5447 case R_SH_GOTOFF:
5448 case R_SH_GOTOFF20:
5449 case R_SH_FUNCDESC:
5450 case R_SH_GOTFUNCDESC:
5451 case R_SH_GOTFUNCDESC20:
5452 case R_SH_GOTOFFFUNCDESC:
5453 case R_SH_GOTOFFFUNCDESC20:
5454 case R_SH_GOTPC:
5455 case R_SH_TLS_GD_32:
5456 case R_SH_TLS_LD_32:
5457 case R_SH_TLS_IE_32:
5458 if (htab->root.dynobj == NULL)
5459 htab->root.dynobj = abfd;
5460 if (!create_got_section (htab->root.dynobj, info))
5461 return FALSE;
5462 break;
5463
5464 default:
5465 break;
5466 }
5467 }
5468
5469 switch (r_type)
5470 {
5471 /* This relocation describes the C++ object vtable hierarchy.
5472 Reconstruct it for later use during GC. */
5473 case R_SH_GNU_VTINHERIT:
5474 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5475 return FALSE;
5476 break;
5477
5478 /* This relocation describes which C++ vtable entries are actually
5479 used. Record for later use during GC. */
5480 case R_SH_GNU_VTENTRY:
5481 BFD_ASSERT (h != NULL);
5482 if (h != NULL
5483 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5484 return FALSE;
5485 break;
5486
5487 case R_SH_TLS_IE_32:
5488 if (bfd_link_pic (info))
5489 info->flags |= DF_STATIC_TLS;
5490
5491 /* FALLTHROUGH */
5492 force_got:
5493 case R_SH_TLS_GD_32:
5494 case R_SH_GOT32:
5495 case R_SH_GOT20:
5496 case R_SH_GOTFUNCDESC:
5497 case R_SH_GOTFUNCDESC20:
5498 switch (r_type)
5499 {
5500 default:
5501 got_type = GOT_NORMAL;
5502 break;
5503 case R_SH_TLS_GD_32:
5504 got_type = GOT_TLS_GD;
5505 break;
5506 case R_SH_TLS_IE_32:
5507 got_type = GOT_TLS_IE;
5508 break;
5509 case R_SH_GOTFUNCDESC:
5510 case R_SH_GOTFUNCDESC20:
5511 got_type = GOT_FUNCDESC;
5512 break;
5513 }
5514
5515 if (h != NULL)
5516 {
5517 h->got.refcount += 1;
5518 old_got_type = sh_elf_hash_entry (h)->got_type;
5519 }
5520 else
5521 {
5522 bfd_signed_vma *local_got_refcounts;
5523
5524 /* This is a global offset table entry for a local
5525 symbol. */
5526 local_got_refcounts = elf_local_got_refcounts (abfd);
5527 if (local_got_refcounts == NULL)
5528 {
5529 bfd_size_type size;
5530
5531 size = symtab_hdr->sh_info;
5532 size *= sizeof (bfd_signed_vma);
5533 size += symtab_hdr->sh_info;
5534 local_got_refcounts = ((bfd_signed_vma *)
5535 bfd_zalloc (abfd, size));
5536 if (local_got_refcounts == NULL)
5537 return FALSE;
5538 elf_local_got_refcounts (abfd) = local_got_refcounts;
5539 sh_elf_local_got_type (abfd)
5540 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
5541 }
5542 local_got_refcounts[r_symndx] += 1;
5543 old_got_type = sh_elf_local_got_type (abfd) [r_symndx];
5544 }
5545
5546 /* If a TLS symbol is accessed using IE at least once,
5547 there is no point to use dynamic model for it. */
5548 if (old_got_type != got_type && old_got_type != GOT_UNKNOWN
5549 && (old_got_type != GOT_TLS_GD || got_type != GOT_TLS_IE))
5550 {
5551 if (old_got_type == GOT_TLS_IE && got_type == GOT_TLS_GD)
5552 got_type = GOT_TLS_IE;
5553 else
5554 {
5555 if ((old_got_type == GOT_FUNCDESC || got_type == GOT_FUNCDESC)
5556 && (old_got_type == GOT_NORMAL || got_type == GOT_NORMAL))
5557 _bfd_error_handler
5558 /* xgettext:c-format */
5559 (_("%pB: `%s' accessed both as normal and FDPIC symbol"),
5560 abfd, h->root.root.string);
5561 else if (old_got_type == GOT_FUNCDESC
5562 || got_type == GOT_FUNCDESC)
5563 _bfd_error_handler
5564 /* xgettext:c-format */
5565 (_("%pB: `%s' accessed both as FDPIC and thread local symbol"),
5566 abfd, h->root.root.string);
5567 else
5568 _bfd_error_handler
5569 /* xgettext:c-format */
5570 (_("%pB: `%s' accessed both as normal and thread local symbol"),
5571 abfd, h->root.root.string);
5572 return FALSE;
5573 }
5574 }
5575
5576 if (old_got_type != got_type)
5577 {
5578 if (h != NULL)
5579 sh_elf_hash_entry (h)->got_type = got_type;
5580 else
5581 sh_elf_local_got_type (abfd) [r_symndx] = got_type;
5582 }
5583
5584 break;
5585
5586 case R_SH_TLS_LD_32:
5587 sh_elf_hash_table(info)->tls_ldm_got.refcount += 1;
5588 break;
5589
5590 case R_SH_FUNCDESC:
5591 case R_SH_GOTOFFFUNCDESC:
5592 case R_SH_GOTOFFFUNCDESC20:
5593 if (rel->r_addend)
5594 {
5595 _bfd_error_handler
5596 (_("%pB: Function descriptor relocation with non-zero addend"),
5597 abfd);
5598 return FALSE;
5599 }
5600
5601 if (h == NULL)
5602 {
5603 union gotref *local_funcdesc;
5604
5605 /* We need a function descriptor for a local symbol. */
5606 local_funcdesc = sh_elf_local_funcdesc (abfd);
5607 if (local_funcdesc == NULL)
5608 {
5609 bfd_size_type size;
5610
5611 size = symtab_hdr->sh_info * sizeof (union gotref);
5612 local_funcdesc = (union gotref *) bfd_zalloc (abfd, size);
5613 if (local_funcdesc == NULL)
5614 return FALSE;
5615 sh_elf_local_funcdesc (abfd) = local_funcdesc;
5616 }
5617 local_funcdesc[r_symndx].refcount += 1;
5618
5619 if (r_type == R_SH_FUNCDESC)
5620 {
5621 if (!bfd_link_pic (info))
5622 htab->srofixup->size += 4;
5623 else
5624 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5625 }
5626 }
5627 else
5628 {
5629 sh_elf_hash_entry (h)->funcdesc.refcount++;
5630 if (r_type == R_SH_FUNCDESC)
5631 sh_elf_hash_entry (h)->abs_funcdesc_refcount++;
5632
5633 /* If there is a function descriptor reference, then
5634 there should not be any non-FDPIC references. */
5635 old_got_type = sh_elf_hash_entry (h)->got_type;
5636 if (old_got_type != GOT_FUNCDESC && old_got_type != GOT_UNKNOWN)
5637 {
5638 if (old_got_type == GOT_NORMAL)
5639 _bfd_error_handler
5640 /* xgettext:c-format */
5641 (_("%pB: `%s' accessed both as normal and FDPIC symbol"),
5642 abfd, h->root.root.string);
5643 else
5644 _bfd_error_handler
5645 /* xgettext:c-format */
5646 (_("%pB: `%s' accessed both as FDPIC and thread local symbol"),
5647 abfd, h->root.root.string);
5648 }
5649 }
5650 break;
5651
5652 case R_SH_GOTPLT32:
5653 /* If this is a local symbol, we resolve it directly without
5654 creating a procedure linkage table entry. */
5655
5656 if (h == NULL
5657 || h->forced_local
5658 || ! bfd_link_pic (info)
5659 || info->symbolic
5660 || h->dynindx == -1)
5661 goto force_got;
5662
5663 h->needs_plt = 1;
5664 h->plt.refcount += 1;
5665 ((struct elf_sh_link_hash_entry *) h)->gotplt_refcount += 1;
5666
5667 break;
5668
5669 case R_SH_PLT32:
5670 /* This symbol requires a procedure linkage table entry. We
5671 actually build the entry in adjust_dynamic_symbol,
5672 because this might be a case of linking PIC code which is
5673 never referenced by a dynamic object, in which case we
5674 don't need to generate a procedure linkage table entry
5675 after all. */
5676
5677 /* If this is a local symbol, we resolve it directly without
5678 creating a procedure linkage table entry. */
5679 if (h == NULL)
5680 continue;
5681
5682 if (h->forced_local)
5683 break;
5684
5685 h->needs_plt = 1;
5686 h->plt.refcount += 1;
5687 break;
5688
5689 case R_SH_DIR32:
5690 case R_SH_REL32:
5691 if (h != NULL && ! bfd_link_pic (info))
5692 {
5693 h->non_got_ref = 1;
5694 h->plt.refcount += 1;
5695 }
5696
5697 /* If we are creating a shared library, and this is a reloc
5698 against a global symbol, or a non PC relative reloc
5699 against a local symbol, then we need to copy the reloc
5700 into the shared library. However, if we are linking with
5701 -Bsymbolic, we do not need to copy a reloc against a
5702 global symbol which is defined in an object we are
5703 including in the link (i.e., DEF_REGULAR is set). At
5704 this point we have not seen all the input files, so it is
5705 possible that DEF_REGULAR is not set now but will be set
5706 later (it is never cleared). We account for that
5707 possibility below by storing information in the
5708 dyn_relocs field of the hash table entry. A similar
5709 situation occurs when creating shared libraries and symbol
5710 visibility changes render the symbol local.
5711
5712 If on the other hand, we are creating an executable, we
5713 may need to keep relocations for symbols satisfied by a
5714 dynamic library if we manage to avoid copy relocs for the
5715 symbol. */
5716 if ((bfd_link_pic (info)
5717 && (sec->flags & SEC_ALLOC) != 0
5718 && (r_type != R_SH_REL32
5719 || (h != NULL
5720 && (! info->symbolic
5721 || h->root.type == bfd_link_hash_defweak
5722 || !h->def_regular))))
5723 || (! bfd_link_pic (info)
5724 && (sec->flags & SEC_ALLOC) != 0
5725 && h != NULL
5726 && (h->root.type == bfd_link_hash_defweak
5727 || !h->def_regular)))
5728 {
5729 struct elf_dyn_relocs *p;
5730 struct elf_dyn_relocs **head;
5731
5732 if (htab->root.dynobj == NULL)
5733 htab->root.dynobj = abfd;
5734
5735 /* When creating a shared object, we must copy these
5736 reloc types into the output file. We create a reloc
5737 section in dynobj and make room for this reloc. */
5738 if (sreloc == NULL)
5739 {
5740 sreloc = _bfd_elf_make_dynamic_reloc_section
5741 (sec, htab->root.dynobj, 2, abfd, /*rela?*/ TRUE);
5742
5743 if (sreloc == NULL)
5744 return FALSE;
5745 }
5746
5747 /* If this is a global symbol, we count the number of
5748 relocations we need for this symbol. */
5749 if (h != NULL)
5750 head = &((struct elf_sh_link_hash_entry *) h)->dyn_relocs;
5751 else
5752 {
5753 /* Track dynamic relocs needed for local syms too. */
5754 asection *s;
5755 void *vpp;
5756 Elf_Internal_Sym *isym;
5757
5758 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5759 abfd, r_symndx);
5760 if (isym == NULL)
5761 return FALSE;
5762
5763 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5764 if (s == NULL)
5765 s = sec;
5766
5767 vpp = &elf_section_data (s)->local_dynrel;
5768 head = (struct elf_dyn_relocs **) vpp;
5769 }
5770
5771 p = *head;
5772 if (p == NULL || p->sec != sec)
5773 {
5774 bfd_size_type amt = sizeof (*p);
5775 p = bfd_alloc (htab->root.dynobj, amt);
5776 if (p == NULL)
5777 return FALSE;
5778 p->next = *head;
5779 *head = p;
5780 p->sec = sec;
5781 p->count = 0;
5782 p->pc_count = 0;
5783 }
5784
5785 p->count += 1;
5786 if (r_type == R_SH_REL32)
5787 p->pc_count += 1;
5788 }
5789
5790 /* Allocate the fixup regardless of whether we need a relocation.
5791 If we end up generating the relocation, we'll unallocate the
5792 fixup. */
5793 if (htab->fdpic_p && !bfd_link_pic (info)
5794 && r_type == R_SH_DIR32
5795 && (sec->flags & SEC_ALLOC) != 0)
5796 htab->srofixup->size += 4;
5797 break;
5798
5799 case R_SH_TLS_LE_32:
5800 if (bfd_link_dll (info))
5801 {
5802 _bfd_error_handler
5803 (_("%pB: TLS local exec code cannot be linked into shared objects"),
5804 abfd);
5805 return FALSE;
5806 }
5807
5808 break;
5809
5810 case R_SH_TLS_LDO_32:
5811 /* Nothing to do. */
5812 break;
5813
5814 default:
5815 break;
5816 }
5817 }
5818
5819 return TRUE;
5820 }
5821
5822 #ifndef sh_elf_set_mach_from_flags
5823 static unsigned int sh_ef_bfd_table[] = { EF_SH_BFD_TABLE };
5824
5825 static bfd_boolean
5826 sh_elf_set_mach_from_flags (bfd *abfd)
5827 {
5828 flagword flags = elf_elfheader (abfd)->e_flags & EF_SH_MACH_MASK;
5829
5830 if (flags >= ARRAY_SIZE (sh_ef_bfd_table))
5831 return FALSE;
5832
5833 if (sh_ef_bfd_table[flags] == 0)
5834 return FALSE;
5835
5836 bfd_default_set_arch_mach (abfd, bfd_arch_sh, sh_ef_bfd_table[flags]);
5837
5838 return TRUE;
5839 }
5840
5841
5842 /* Reverse table lookup for sh_ef_bfd_table[].
5843 Given a bfd MACH value from archures.c
5844 return the equivalent ELF flags from the table.
5845 Return -1 if no match is found. */
5846
5847 int
5848 sh_elf_get_flags_from_mach (unsigned long mach)
5849 {
5850 int i = ARRAY_SIZE (sh_ef_bfd_table) - 1;
5851
5852 for (; i>0; i--)
5853 if (sh_ef_bfd_table[i] == mach)
5854 return i;
5855
5856 /* shouldn't get here */
5857 BFD_FAIL();
5858
5859 return -1;
5860 }
5861 #endif /* not sh_elf_set_mach_from_flags */
5862
5863 #ifndef sh_elf_copy_private_data
5864 /* Copy backend specific data from one object module to another */
5865
5866 static bfd_boolean
5867 sh_elf_copy_private_data (bfd * ibfd, bfd * obfd)
5868 {
5869 if (! is_sh_elf (ibfd) || ! is_sh_elf (obfd))
5870 return TRUE;
5871
5872 if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd))
5873 return FALSE;
5874
5875 return sh_elf_set_mach_from_flags (obfd);
5876 }
5877 #endif /* not sh_elf_copy_private_data */
5878
5879 #ifndef sh_elf_merge_private_data
5880
5881 /* This function returns the ELF architecture number that
5882 corresponds to the given arch_sh* flags. */
5883
5884 int
5885 sh_find_elf_flags (unsigned int arch_set)
5886 {
5887 extern unsigned long sh_get_bfd_mach_from_arch_set (unsigned int);
5888 unsigned long bfd_mach = sh_get_bfd_mach_from_arch_set (arch_set);
5889
5890 return sh_elf_get_flags_from_mach (bfd_mach);
5891 }
5892
5893 /* Merge the architecture type of two BFD files, such that the
5894 resultant architecture supports all the features required
5895 by the two input BFDs.
5896 If the input BFDs are multually incompatible - i.e. one uses
5897 DSP while the other uses FPU - or there is no known architecture
5898 that fits the requirements then an error is emitted. */
5899
5900 static bfd_boolean
5901 sh_merge_bfd_arch (bfd *ibfd, struct bfd_link_info *info)
5902 {
5903 bfd *obfd = info->output_bfd;
5904 unsigned int old_arch, new_arch, merged_arch;
5905
5906 if (! _bfd_generic_verify_endian_match (ibfd, info))
5907 return FALSE;
5908
5909 old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
5910 new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
5911
5912 merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
5913
5914 if (!SH_VALID_CO_ARCH_SET (merged_arch))
5915 {
5916 _bfd_error_handler
5917 /* xgettext:c-format */
5918 (_("%pB: uses %s instructions while previous modules "
5919 "use %s instructions"),
5920 ibfd,
5921 SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
5922 SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
5923 bfd_set_error (bfd_error_bad_value);
5924 return FALSE;
5925 }
5926 else if (!SH_VALID_ARCH_SET (merged_arch))
5927 {
5928 _bfd_error_handler
5929 /* xgettext:c-format */
5930 (_("internal error: merge of architecture '%s' with "
5931 "architecture '%s' produced unknown architecture"),
5932 bfd_printable_name (obfd),
5933 bfd_printable_name (ibfd));
5934 bfd_set_error (bfd_error_bad_value);
5935 return FALSE;
5936 }
5937
5938 bfd_default_set_arch_mach (obfd, bfd_arch_sh,
5939 sh_get_bfd_mach_from_arch_set (merged_arch));
5940
5941 return TRUE;
5942 }
5943
5944 /* This routine initialises the elf flags when required and
5945 calls sh_merge_bfd_arch() to check dsp/fpu compatibility. */
5946
5947 static bfd_boolean
5948 sh_elf_merge_private_data (bfd *ibfd, struct bfd_link_info *info)
5949 {
5950 bfd *obfd = info->output_bfd;
5951
5952 if (! is_sh_elf (ibfd) || ! is_sh_elf (obfd))
5953 return TRUE;
5954
5955 if (! elf_flags_init (obfd))
5956 {
5957 /* This happens when ld starts out with a 'blank' output file. */
5958 elf_flags_init (obfd) = TRUE;
5959 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
5960 sh_elf_set_mach_from_flags (obfd);
5961 if (elf_elfheader (obfd)->e_flags & EF_SH_FDPIC)
5962 elf_elfheader (obfd)->e_flags &= ~EF_SH_PIC;
5963 }
5964
5965 if (! sh_merge_bfd_arch (ibfd, info))
5966 {
5967 _bfd_error_handler (_("%pB: uses instructions which are incompatible "
5968 "with instructions used in previous modules"),
5969 ibfd);
5970 bfd_set_error (bfd_error_bad_value);
5971 return FALSE;
5972 }
5973
5974 elf_elfheader (obfd)->e_flags &= ~EF_SH_MACH_MASK;
5975 elf_elfheader (obfd)->e_flags |=
5976 sh_elf_get_flags_from_mach (bfd_get_mach (obfd));
5977
5978 if (fdpic_object_p (ibfd) != fdpic_object_p (obfd))
5979 {
5980 _bfd_error_handler (_("%pB: attempt to mix FDPIC and non-FDPIC objects"),
5981 ibfd);
5982 bfd_set_error (bfd_error_bad_value);
5983 return FALSE;
5984 }
5985
5986 return TRUE;
5987 }
5988 #endif /* not sh_elf_merge_private_data */
5989
5990 /* Override the generic function because we need to store sh_elf_obj_tdata
5991 as the specific tdata. We set also the machine architecture from flags
5992 here. */
5993
5994 static bfd_boolean
5995 sh_elf_object_p (bfd *abfd)
5996 {
5997 if (! sh_elf_set_mach_from_flags (abfd))
5998 return FALSE;
5999
6000 return (((elf_elfheader (abfd)->e_flags & EF_SH_FDPIC) != 0)
6001 == fdpic_object_p (abfd));
6002 }
6003
6004 /* Finish up dynamic symbol handling. We set the contents of various
6005 dynamic sections here. */
6006
6007 static bfd_boolean
6008 sh_elf_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
6009 struct elf_link_hash_entry *h,
6010 Elf_Internal_Sym *sym)
6011 {
6012 struct elf_sh_link_hash_table *htab;
6013
6014 htab = sh_elf_hash_table (info);
6015 if (htab == NULL)
6016 return FALSE;
6017
6018 if (h->plt.offset != (bfd_vma) -1)
6019 {
6020 asection *splt;
6021 asection *sgotplt;
6022 asection *srelplt;
6023
6024 bfd_vma plt_index;
6025 bfd_vma got_offset;
6026 Elf_Internal_Rela rel;
6027 bfd_byte *loc;
6028 const struct elf_sh_plt_info *plt_info;
6029
6030 /* This symbol has an entry in the procedure linkage table. Set
6031 it up. */
6032
6033 BFD_ASSERT (h->dynindx != -1);
6034
6035 splt = htab->root.splt;
6036 sgotplt = htab->root.sgotplt;
6037 srelplt = htab->root.srelplt;
6038 BFD_ASSERT (splt != NULL && sgotplt != NULL && srelplt != NULL);
6039
6040 /* Get the index in the procedure linkage table which
6041 corresponds to this symbol. This is the index of this symbol
6042 in all the symbols for which we are making plt entries. The
6043 first entry in the procedure linkage table is reserved. */
6044 plt_index = get_plt_index (htab->plt_info, h->plt.offset);
6045
6046 plt_info = htab->plt_info;
6047 if (plt_info->short_plt != NULL && plt_index <= MAX_SHORT_PLT)
6048 plt_info = plt_info->short_plt;
6049
6050 /* Get the offset into the .got table of the entry that
6051 corresponds to this function. */
6052 if (htab->fdpic_p)
6053 /* The offset must be relative to the GOT symbol, twelve bytes
6054 before the end of .got.plt. Each descriptor is eight
6055 bytes. */
6056 got_offset = plt_index * 8 + 12 - sgotplt->size;
6057 else
6058 /* Each .got entry is 4 bytes. The first three are
6059 reserved. */
6060 got_offset = (plt_index + 3) * 4;
6061
6062 #ifdef GOT_BIAS
6063 if (bfd_link_pic (info))
6064 got_offset -= GOT_BIAS;
6065 #endif
6066
6067 /* Fill in the entry in the procedure linkage table. */
6068 memcpy (splt->contents + h->plt.offset,
6069 plt_info->symbol_entry,
6070 plt_info->symbol_entry_size);
6071
6072 if (bfd_link_pic (info) || htab->fdpic_p)
6073 {
6074 if (plt_info->symbol_fields.got20)
6075 {
6076 bfd_reloc_status_type r;
6077 r = install_movi20_field (output_bfd, got_offset,
6078 splt->owner, splt, splt->contents,
6079 h->plt.offset
6080 + plt_info->symbol_fields.got_entry);
6081 BFD_ASSERT (r == bfd_reloc_ok);
6082 }
6083 else
6084 install_plt_field (output_bfd, FALSE, got_offset,
6085 (splt->contents
6086 + h->plt.offset
6087 + plt_info->symbol_fields.got_entry));
6088 }
6089 else
6090 {
6091 BFD_ASSERT (!plt_info->symbol_fields.got20);
6092
6093 install_plt_field (output_bfd, FALSE,
6094 (sgotplt->output_section->vma
6095 + sgotplt->output_offset
6096 + got_offset),
6097 (splt->contents
6098 + h->plt.offset
6099 + plt_info->symbol_fields.got_entry));
6100 if (htab->vxworks_p)
6101 {
6102 unsigned int reachable_plts, plts_per_4k;
6103 int distance;
6104
6105 /* Divide the PLT into groups. The first group contains
6106 REACHABLE_PLTS entries and the other groups contain
6107 PLTS_PER_4K entries. Entries in the first group can
6108 branch directly to .plt; those in later groups branch
6109 to the last element of the previous group. */
6110 /* ??? It would be better to create multiple copies of
6111 the common resolver stub. */
6112 reachable_plts = ((4096
6113 - plt_info->plt0_entry_size
6114 - (plt_info->symbol_fields.plt + 4))
6115 / plt_info->symbol_entry_size) + 1;
6116 plts_per_4k = (4096 / plt_info->symbol_entry_size);
6117 if (plt_index < reachable_plts)
6118 distance = -(h->plt.offset
6119 + plt_info->symbol_fields.plt);
6120 else
6121 distance = -(((plt_index - reachable_plts) % plts_per_4k + 1)
6122 * plt_info->symbol_entry_size);
6123
6124 /* Install the 'bra' with this offset. */
6125 bfd_put_16 (output_bfd,
6126 0xa000 | (0x0fff & ((distance - 4) / 2)),
6127 (splt->contents
6128 + h->plt.offset
6129 + plt_info->symbol_fields.plt));
6130 }
6131 else
6132 install_plt_field (output_bfd, TRUE,
6133 splt->output_section->vma + splt->output_offset,
6134 (splt->contents
6135 + h->plt.offset
6136 + plt_info->symbol_fields.plt));
6137 }
6138
6139 /* Make got_offset relative to the start of .got.plt. */
6140 #ifdef GOT_BIAS
6141 if (bfd_link_pic (info))
6142 got_offset += GOT_BIAS;
6143 #endif
6144 if (htab->fdpic_p)
6145 got_offset = plt_index * 8;
6146
6147 if (plt_info->symbol_fields.reloc_offset != MINUS_ONE)
6148 install_plt_field (output_bfd, FALSE,
6149 plt_index * sizeof (Elf32_External_Rela),
6150 (splt->contents
6151 + h->plt.offset
6152 + plt_info->symbol_fields.reloc_offset));
6153
6154 /* Fill in the entry in the global offset table. */
6155 bfd_put_32 (output_bfd,
6156 (splt->output_section->vma
6157 + splt->output_offset
6158 + h->plt.offset
6159 + plt_info->symbol_resolve_offset),
6160 sgotplt->contents + got_offset);
6161 if (htab->fdpic_p)
6162 bfd_put_32 (output_bfd,
6163 sh_elf_osec_to_segment (output_bfd, splt->output_section),
6164 sgotplt->contents + got_offset + 4);
6165
6166 /* Fill in the entry in the .rela.plt section. */
6167 rel.r_offset = (sgotplt->output_section->vma
6168 + sgotplt->output_offset
6169 + got_offset);
6170 if (htab->fdpic_p)
6171 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_FUNCDESC_VALUE);
6172 else
6173 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_JMP_SLOT);
6174 rel.r_addend = 0;
6175 #ifdef GOT_BIAS
6176 rel.r_addend = GOT_BIAS;
6177 #endif
6178 loc = srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
6179 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6180
6181 if (htab->vxworks_p && !bfd_link_pic (info))
6182 {
6183 /* Create the .rela.plt.unloaded relocations for this PLT entry.
6184 Begin by pointing LOC to the first such relocation. */
6185 loc = (htab->srelplt2->contents
6186 + (plt_index * 2 + 1) * sizeof (Elf32_External_Rela));
6187
6188 /* Create a .rela.plt.unloaded R_SH_DIR32 relocation
6189 for the PLT entry's pointer to the .got.plt entry. */
6190 rel.r_offset = (splt->output_section->vma
6191 + splt->output_offset
6192 + h->plt.offset
6193 + plt_info->symbol_fields.got_entry);
6194 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_SH_DIR32);
6195 rel.r_addend = got_offset;
6196 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6197 loc += sizeof (Elf32_External_Rela);
6198
6199 /* Create a .rela.plt.unloaded R_SH_DIR32 relocation for
6200 the .got.plt entry, which initially points to .plt. */
6201 rel.r_offset = (sgotplt->output_section->vma
6202 + sgotplt->output_offset
6203 + got_offset);
6204 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_SH_DIR32);
6205 rel.r_addend = 0;
6206 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6207 }
6208
6209 if (!h->def_regular)
6210 {
6211 /* Mark the symbol as undefined, rather than as defined in
6212 the .plt section. Leave the value alone. */
6213 sym->st_shndx = SHN_UNDEF;
6214 }
6215 }
6216
6217 if (h->got.offset != (bfd_vma) -1
6218 && sh_elf_hash_entry (h)->got_type != GOT_TLS_GD
6219 && sh_elf_hash_entry (h)->got_type != GOT_TLS_IE
6220 && sh_elf_hash_entry (h)->got_type != GOT_FUNCDESC)
6221 {
6222 asection *sgot;
6223 asection *srelgot;
6224 Elf_Internal_Rela rel;
6225 bfd_byte *loc;
6226
6227 /* This symbol has an entry in the global offset table. Set it
6228 up. */
6229
6230 sgot = htab->root.sgot;
6231 srelgot = htab->root.srelgot;
6232 BFD_ASSERT (sgot != NULL && srelgot != NULL);
6233
6234 rel.r_offset = (sgot->output_section->vma
6235 + sgot->output_offset
6236 + (h->got.offset &~ (bfd_vma) 1));
6237
6238 /* If this is a static link, or it is a -Bsymbolic link and the
6239 symbol is defined locally or was forced to be local because
6240 of a version file, we just want to emit a RELATIVE reloc.
6241 The entry in the global offset table will already have been
6242 initialized in the relocate_section function. */
6243 if (bfd_link_pic (info)
6244 && SYMBOL_REFERENCES_LOCAL (info, h))
6245 {
6246 if (htab->fdpic_p)
6247 {
6248 asection *sec = h->root.u.def.section;
6249 int dynindx
6250 = elf_section_data (sec->output_section)->dynindx;
6251
6252 rel.r_info = ELF32_R_INFO (dynindx, R_SH_DIR32);
6253 rel.r_addend = (h->root.u.def.value
6254 + h->root.u.def.section->output_offset);
6255 }
6256 else
6257 {
6258 rel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
6259 rel.r_addend = (h->root.u.def.value
6260 + h->root.u.def.section->output_section->vma
6261 + h->root.u.def.section->output_offset);
6262 }
6263 }
6264 else
6265 {
6266 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
6267 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_GLOB_DAT);
6268 rel.r_addend = 0;
6269 }
6270
6271 loc = srelgot->contents;
6272 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
6273 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6274 }
6275
6276 if (h->needs_copy)
6277 {
6278 asection *s;
6279 Elf_Internal_Rela rel;
6280 bfd_byte *loc;
6281
6282 /* This symbol needs a copy reloc. Set it up. */
6283
6284 BFD_ASSERT (h->dynindx != -1
6285 && (h->root.type == bfd_link_hash_defined
6286 || h->root.type == bfd_link_hash_defweak));
6287
6288 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss");
6289 BFD_ASSERT (s != NULL);
6290
6291 rel.r_offset = (h->root.u.def.value
6292 + h->root.u.def.section->output_section->vma
6293 + h->root.u.def.section->output_offset);
6294 rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_COPY);
6295 rel.r_addend = 0;
6296 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
6297 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6298 }
6299
6300 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
6301 _GLOBAL_OFFSET_TABLE_ is not absolute: it is relative to the
6302 ".got" section. */
6303 if (h == htab->root.hdynamic
6304 || (!htab->vxworks_p && h == htab->root.hgot))
6305 sym->st_shndx = SHN_ABS;
6306
6307 return TRUE;
6308 }
6309
6310 /* Finish up the dynamic sections. */
6311
6312 static bfd_boolean
6313 sh_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
6314 {
6315 struct elf_sh_link_hash_table *htab;
6316 asection *sgotplt;
6317 asection *sdyn;
6318
6319 htab = sh_elf_hash_table (info);
6320 if (htab == NULL)
6321 return FALSE;
6322
6323 sgotplt = htab->root.sgotplt;
6324 sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic");
6325
6326 if (htab->root.dynamic_sections_created)
6327 {
6328 asection *splt;
6329 Elf32_External_Dyn *dyncon, *dynconend;
6330
6331 BFD_ASSERT (sgotplt != NULL && sdyn != NULL);
6332
6333 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6334 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6335 for (; dyncon < dynconend; dyncon++)
6336 {
6337 Elf_Internal_Dyn dyn;
6338 asection *s;
6339
6340 bfd_elf32_swap_dyn_in (htab->root.dynobj, dyncon, &dyn);
6341
6342 switch (dyn.d_tag)
6343 {
6344 default:
6345 if (htab->vxworks_p
6346 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
6347 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6348 break;
6349
6350 case DT_PLTGOT:
6351 BFD_ASSERT (htab->root.hgot != NULL);
6352 s = htab->root.hgot->root.u.def.section;
6353 dyn.d_un.d_ptr = htab->root.hgot->root.u.def.value
6354 + s->output_section->vma + s->output_offset;
6355 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6356 break;
6357
6358 case DT_JMPREL:
6359 s = htab->root.srelplt->output_section;
6360 BFD_ASSERT (s != NULL);
6361 dyn.d_un.d_ptr = s->vma;
6362 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6363 break;
6364
6365 case DT_PLTRELSZ:
6366 s = htab->root.srelplt->output_section;
6367 BFD_ASSERT (s != NULL);
6368 dyn.d_un.d_val = s->size;
6369 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6370 break;
6371 }
6372 }
6373
6374 /* Fill in the first entry in the procedure linkage table. */
6375 splt = htab->root.splt;
6376 if (splt && splt->size > 0 && htab->plt_info->plt0_entry)
6377 {
6378 unsigned int i;
6379
6380 memcpy (splt->contents,
6381 htab->plt_info->plt0_entry,
6382 htab->plt_info->plt0_entry_size);
6383 for (i = 0; i < ARRAY_SIZE (htab->plt_info->plt0_got_fields); i++)
6384 if (htab->plt_info->plt0_got_fields[i] != MINUS_ONE)
6385 install_plt_field (output_bfd, FALSE,
6386 (sgotplt->output_section->vma
6387 + sgotplt->output_offset
6388 + (i * 4)),
6389 (splt->contents
6390 + htab->plt_info->plt0_got_fields[i]));
6391
6392 if (htab->vxworks_p)
6393 {
6394 /* Finalize the .rela.plt.unloaded contents. */
6395 Elf_Internal_Rela rel;
6396 bfd_byte *loc;
6397
6398 /* Create a .rela.plt.unloaded R_SH_DIR32 relocation for the
6399 first PLT entry's pointer to _GLOBAL_OFFSET_TABLE_ + 8. */
6400 loc = htab->srelplt2->contents;
6401 rel.r_offset = (splt->output_section->vma
6402 + splt->output_offset
6403 + htab->plt_info->plt0_got_fields[2]);
6404 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_SH_DIR32);
6405 rel.r_addend = 8;
6406 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
6407 loc += sizeof (Elf32_External_Rela);
6408
6409 /* Fix up the remaining .rela.plt.unloaded relocations.
6410 They may have the wrong symbol index for _G_O_T_ or
6411 _P_L_T_ depending on the order in which symbols were
6412 output. */
6413 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
6414 {
6415 /* The PLT entry's pointer to the .got.plt slot. */
6416 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
6417 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx,
6418 R_SH_DIR32);
6419 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6420 loc += sizeof (Elf32_External_Rela);
6421
6422 /* The .got.plt slot's pointer to .plt. */
6423 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
6424 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx,
6425 R_SH_DIR32);
6426 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6427 loc += sizeof (Elf32_External_Rela);
6428 }
6429 }
6430
6431 /* UnixWare sets the entsize of .plt to 4, although that doesn't
6432 really seem like the right value. */
6433 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
6434 }
6435 }
6436
6437 /* Fill in the first three entries in the global offset table. */
6438 if (sgotplt && sgotplt->size > 0 && !htab->fdpic_p)
6439 {
6440 if (sdyn == NULL)
6441 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents);
6442 else
6443 bfd_put_32 (output_bfd,
6444 sdyn->output_section->vma + sdyn->output_offset,
6445 sgotplt->contents);
6446 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4);
6447 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8);
6448 }
6449
6450 if (sgotplt && sgotplt->size > 0)
6451 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4;
6452
6453 /* At the very end of the .rofixup section is a pointer to the GOT. */
6454 if (htab->fdpic_p && htab->srofixup != NULL)
6455 {
6456 struct elf_link_hash_entry *hgot = htab->root.hgot;
6457 bfd_vma got_value = hgot->root.u.def.value
6458 + hgot->root.u.def.section->output_section->vma
6459 + hgot->root.u.def.section->output_offset;
6460
6461 sh_elf_add_rofixup (output_bfd, htab->srofixup, got_value);
6462
6463 /* Make sure we allocated and generated the same number of fixups. */
6464 BFD_ASSERT (htab->srofixup->reloc_count * 4 == htab->srofixup->size);
6465 }
6466
6467 if (htab->srelfuncdesc)
6468 BFD_ASSERT (htab->srelfuncdesc->reloc_count * sizeof (Elf32_External_Rela)
6469 == htab->srelfuncdesc->size);
6470
6471 if (htab->root.srelgot)
6472 BFD_ASSERT (htab->root.srelgot->reloc_count * sizeof (Elf32_External_Rela)
6473 == htab->root.srelgot->size);
6474
6475 return TRUE;
6476 }
6477
6478 static enum elf_reloc_type_class
6479 sh_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6480 const asection *rel_sec ATTRIBUTE_UNUSED,
6481 const Elf_Internal_Rela *rela)
6482 {
6483 switch ((int) ELF32_R_TYPE (rela->r_info))
6484 {
6485 case R_SH_RELATIVE:
6486 return reloc_class_relative;
6487 case R_SH_JMP_SLOT:
6488 return reloc_class_plt;
6489 case R_SH_COPY:
6490 return reloc_class_copy;
6491 default:
6492 return reloc_class_normal;
6493 }
6494 }
6495
6496 #if !defined SH_TARGET_ALREADY_DEFINED
6497 /* Support for Linux core dump NOTE sections. */
6498
6499 static bfd_boolean
6500 elf32_shlin_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6501 {
6502 int offset;
6503 unsigned int size;
6504
6505 switch (note->descsz)
6506 {
6507 default:
6508 return FALSE;
6509
6510 case 168: /* Linux/SH */
6511 /* pr_cursig */
6512 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
6513
6514 /* pr_pid */
6515 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
6516
6517 /* pr_reg */
6518 offset = 72;
6519 size = 92;
6520
6521 break;
6522 }
6523
6524 /* Make a ".reg/999" section. */
6525 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6526 size, note->descpos + offset);
6527 }
6528
6529 static bfd_boolean
6530 elf32_shlin_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6531 {
6532 switch (note->descsz)
6533 {
6534 default:
6535 return FALSE;
6536
6537 case 124: /* Linux/SH elf_prpsinfo */
6538 elf_tdata (abfd)->core->program
6539 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
6540 elf_tdata (abfd)->core->command
6541 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
6542 }
6543
6544 /* Note that for some reason, a spurious space is tacked
6545 onto the end of the args in some (at least one anyway)
6546 implementations, so strip it off if it exists. */
6547
6548 {
6549 char *command = elf_tdata (abfd)->core->command;
6550 int n = strlen (command);
6551
6552 if (0 < n && command[n - 1] == ' ')
6553 command[n - 1] = '\0';
6554 }
6555
6556 return TRUE;
6557 }
6558 #endif /* not SH_TARGET_ALREADY_DEFINED */
6559
6560
6561 /* Return address for Ith PLT stub in section PLT, for relocation REL
6562 or (bfd_vma) -1 if it should not be included. */
6563
6564 static bfd_vma
6565 sh_elf_plt_sym_val (bfd_vma i, const asection *plt,
6566 const arelent *rel ATTRIBUTE_UNUSED)
6567 {
6568 const struct elf_sh_plt_info *plt_info;
6569
6570 plt_info = get_plt_info (plt->owner, (plt->owner->flags & DYNAMIC) != 0);
6571 return plt->vma + get_plt_offset (plt_info, i);
6572 }
6573
6574 /* Decide whether to attempt to turn absptr or lsda encodings in
6575 shared libraries into pcrel within the given input section. */
6576
6577 static bfd_boolean
6578 sh_elf_use_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED,
6579 struct bfd_link_info *info,
6580 asection *eh_frame_section ATTRIBUTE_UNUSED)
6581 {
6582 struct elf_sh_link_hash_table *htab = sh_elf_hash_table (info);
6583
6584 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6585 if (htab->fdpic_p)
6586 return FALSE;
6587
6588 return TRUE;
6589 }
6590
6591 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6592
6593 static bfd_byte
6594 sh_elf_encode_eh_address (bfd *abfd,
6595 struct bfd_link_info *info,
6596 asection *osec, bfd_vma offset,
6597 asection *loc_sec, bfd_vma loc_offset,
6598 bfd_vma *encoded)
6599 {
6600 struct elf_sh_link_hash_table *htab = sh_elf_hash_table (info);
6601 struct elf_link_hash_entry *h;
6602
6603 if (!htab->fdpic_p)
6604 return _bfd_elf_encode_eh_address (abfd, info, osec, offset, loc_sec,
6605 loc_offset, encoded);
6606
6607 h = htab->root.hgot;
6608 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
6609
6610 if (! h || (sh_elf_osec_to_segment (abfd, osec)
6611 == sh_elf_osec_to_segment (abfd, loc_sec->output_section)))
6612 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
6613 loc_sec, loc_offset, encoded);
6614
6615 BFD_ASSERT (sh_elf_osec_to_segment (abfd, osec)
6616 == (sh_elf_osec_to_segment
6617 (abfd, h->root.u.def.section->output_section)));
6618
6619 *encoded = osec->vma + offset
6620 - (h->root.u.def.value
6621 + h->root.u.def.section->output_section->vma
6622 + h->root.u.def.section->output_offset);
6623
6624 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
6625 }
6626
6627 #if !defined SH_TARGET_ALREADY_DEFINED
6628 #define TARGET_BIG_SYM sh_elf32_vec
6629 #define TARGET_BIG_NAME "elf32-sh"
6630 #define TARGET_LITTLE_SYM sh_elf32_le_vec
6631 #define TARGET_LITTLE_NAME "elf32-shl"
6632 #endif
6633
6634 #define ELF_ARCH bfd_arch_sh
6635 #define ELF_TARGET_ID SH_ELF_DATA
6636 #define ELF_MACHINE_CODE EM_SH
6637 #ifdef __QNXTARGET__
6638 #define ELF_MAXPAGESIZE 0x1000
6639 #else
6640 #define ELF_MAXPAGESIZE 0x80
6641 #endif
6642
6643 #define elf_symbol_leading_char '_'
6644
6645 #define bfd_elf32_bfd_reloc_type_lookup sh_elf_reloc_type_lookup
6646 #define bfd_elf32_bfd_reloc_name_lookup \
6647 sh_elf_reloc_name_lookup
6648 #define elf_info_to_howto sh_elf_info_to_howto
6649 #define bfd_elf32_bfd_relax_section sh_elf_relax_section
6650 #define elf_backend_relocate_section sh_elf_relocate_section
6651 #define bfd_elf32_bfd_get_relocated_section_contents \
6652 sh_elf_get_relocated_section_contents
6653 #define bfd_elf32_mkobject sh_elf_mkobject
6654 #define elf_backend_object_p sh_elf_object_p
6655 #define bfd_elf32_bfd_copy_private_bfd_data \
6656 sh_elf_copy_private_data
6657 #define bfd_elf32_bfd_merge_private_bfd_data \
6658 sh_elf_merge_private_data
6659
6660 #define elf_backend_gc_mark_hook sh_elf_gc_mark_hook
6661 #define elf_backend_check_relocs sh_elf_check_relocs
6662 #define elf_backend_copy_indirect_symbol \
6663 sh_elf_copy_indirect_symbol
6664 #define elf_backend_create_dynamic_sections \
6665 sh_elf_create_dynamic_sections
6666 #define bfd_elf32_bfd_link_hash_table_create \
6667 sh_elf_link_hash_table_create
6668 #define elf_backend_adjust_dynamic_symbol \
6669 sh_elf_adjust_dynamic_symbol
6670 #define elf_backend_always_size_sections \
6671 sh_elf_always_size_sections
6672 #define elf_backend_size_dynamic_sections \
6673 sh_elf_size_dynamic_sections
6674 #define elf_backend_omit_section_dynsym sh_elf_omit_section_dynsym
6675 #define elf_backend_finish_dynamic_symbol \
6676 sh_elf_finish_dynamic_symbol
6677 #define elf_backend_finish_dynamic_sections \
6678 sh_elf_finish_dynamic_sections
6679 #define elf_backend_reloc_type_class sh_elf_reloc_type_class
6680 #define elf_backend_plt_sym_val sh_elf_plt_sym_val
6681 #define elf_backend_can_make_relative_eh_frame \
6682 sh_elf_use_relative_eh_frame
6683 #define elf_backend_can_make_lsda_relative_eh_frame \
6684 sh_elf_use_relative_eh_frame
6685 #define elf_backend_encode_eh_address \
6686 sh_elf_encode_eh_address
6687
6688 #define elf_backend_stack_align 8
6689 #define elf_backend_can_gc_sections 1
6690 #define elf_backend_can_refcount 1
6691 #define elf_backend_want_got_plt 1
6692 #define elf_backend_plt_readonly 1
6693 #define elf_backend_want_plt_sym 0
6694 #define elf_backend_got_header_size 12
6695 #define elf_backend_dtrel_excludes_plt 1
6696
6697 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
6698
6699 #if !defined SH_TARGET_ALREADY_DEFINED
6700
6701 #include "elf32-target.h"
6702
6703 /* NetBSD support. */
6704 #undef TARGET_BIG_SYM
6705 #define TARGET_BIG_SYM sh_elf32_nbsd_vec
6706 #undef TARGET_BIG_NAME
6707 #define TARGET_BIG_NAME "elf32-sh-nbsd"
6708 #undef TARGET_LITTLE_SYM
6709 #define TARGET_LITTLE_SYM sh_elf32_nbsd_le_vec
6710 #undef TARGET_LITTLE_NAME
6711 #define TARGET_LITTLE_NAME "elf32-shl-nbsd"
6712 #undef ELF_MAXPAGESIZE
6713 #define ELF_MAXPAGESIZE 0x10000
6714 #undef ELF_COMMONPAGESIZE
6715 #undef elf_symbol_leading_char
6716 #define elf_symbol_leading_char 0
6717 #undef elf32_bed
6718 #define elf32_bed elf32_sh_nbsd_bed
6719
6720 #include "elf32-target.h"
6721
6722
6723 /* Linux support. */
6724 #undef TARGET_BIG_SYM
6725 #define TARGET_BIG_SYM sh_elf32_linux_be_vec
6726 #undef TARGET_BIG_NAME
6727 #define TARGET_BIG_NAME "elf32-shbig-linux"
6728 #undef TARGET_LITTLE_SYM
6729 #define TARGET_LITTLE_SYM sh_elf32_linux_vec
6730 #undef TARGET_LITTLE_NAME
6731 #define TARGET_LITTLE_NAME "elf32-sh-linux"
6732 #undef ELF_COMMONPAGESIZE
6733 #define ELF_COMMONPAGESIZE 0x1000
6734
6735 #undef elf_backend_grok_prstatus
6736 #define elf_backend_grok_prstatus elf32_shlin_grok_prstatus
6737 #undef elf_backend_grok_psinfo
6738 #define elf_backend_grok_psinfo elf32_shlin_grok_psinfo
6739 #undef elf32_bed
6740 #define elf32_bed elf32_sh_lin_bed
6741
6742 #include "elf32-target.h"
6743
6744
6745 /* FDPIC support. */
6746 #undef TARGET_BIG_SYM
6747 #define TARGET_BIG_SYM sh_elf32_fdpic_be_vec
6748 #undef TARGET_BIG_NAME
6749 #define TARGET_BIG_NAME "elf32-shbig-fdpic"
6750 #undef TARGET_LITTLE_SYM
6751 #define TARGET_LITTLE_SYM sh_elf32_fdpic_le_vec
6752 #undef TARGET_LITTLE_NAME
6753 #define TARGET_LITTLE_NAME "elf32-sh-fdpic"
6754
6755 #undef elf32_bed
6756 #define elf32_bed elf32_sh_fd_bed
6757
6758 #include "elf32-target.h"
6759
6760 #undef elf_backend_modify_program_headers
6761
6762 /* VxWorks support. */
6763 #undef TARGET_BIG_SYM
6764 #define TARGET_BIG_SYM sh_elf32_vxworks_vec
6765 #undef TARGET_BIG_NAME
6766 #define TARGET_BIG_NAME "elf32-sh-vxworks"
6767 #undef TARGET_LITTLE_SYM
6768 #define TARGET_LITTLE_SYM sh_elf32_vxworks_le_vec
6769 #undef TARGET_LITTLE_NAME
6770 #define TARGET_LITTLE_NAME "elf32-shl-vxworks"
6771 #undef elf32_bed
6772 #define elf32_bed elf32_sh_vxworks_bed
6773
6774 #undef elf_backend_want_plt_sym
6775 #define elf_backend_want_plt_sym 1
6776 #undef elf_symbol_leading_char
6777 #define elf_symbol_leading_char '_'
6778 #define elf_backend_want_got_underscore 1
6779 #undef elf_backend_grok_prstatus
6780 #undef elf_backend_grok_psinfo
6781 #undef elf_backend_add_symbol_hook
6782 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
6783 #undef elf_backend_link_output_symbol_hook
6784 #define elf_backend_link_output_symbol_hook \
6785 elf_vxworks_link_output_symbol_hook
6786 #undef elf_backend_emit_relocs
6787 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6788 #undef elf_backend_final_write_processing
6789 #define elf_backend_final_write_processing \
6790 elf_vxworks_final_write_processing
6791 #undef ELF_MAXPAGESIZE
6792 #define ELF_MAXPAGESIZE 0x1000
6793 #undef ELF_COMMONPAGESIZE
6794
6795 #include "elf32-target.h"
6796
6797 #endif /* not SH_TARGET_ALREADY_DEFINED */