1 /* M32R-specific support for 32-bit ELF.
2 Copyright (C) 1996-2014 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/m32r.h"
26
27 #define NOP_INSN 0x7000
28 #define MAKE_PARALLEL(insn) ((insn) | 0x8000)
29
30 /* Use REL instead of RELA to save space.
31 This only saves space in libraries and object files, but perhaps
32 relocs will be put in ROM? All in all though, REL relocs are a pain
33 to work with. */
34 /* #define USE_REL 1
35
36 #ifndef USE_REL
37 #define USE_REL 0
38 #endif */
39 /* Use RELA. But use REL to link old objects for backwords compatibility. */
40
41 /* Functions for the M32R ELF linker. */
42
43 /* The name of the dynamic interpreter. This is put in the .interp
44 section. */
45
46 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
47
48 /* The nop opcode we use. */
49
50 #define M32R_NOP 0x7000f000
51
52 #define PLT_EMPTY 0x10101010 /* RIE -> RIE */
53
54 /* The size in bytes of an entry in the procedure linkage table. */
55
56 #define PLT_ENTRY_SIZE 20
57 #define PLT_HEADER_SIZE 20
58
59 /* The first one entries in a procedure linkage table are reserved,
60 and the initial contents are unimportant (we zero them out).
61 Subsequent entries look like this. */
62
63 #define PLT0_ENTRY_WORD0 0xd6c00000 /* seth r6, #high(.got+4) */
64 #define PLT0_ENTRY_WORD1 0x86e60000 /* or3 r6, r6, #low(.got)+4) */
65 #define PLT0_ENTRY_WORD2 0x24e626c6 /* ld r4, @r6+ -> ld r6, @r6 */
66 #define PLT0_ENTRY_WORD3 0x1fc6f000 /* jmp r6 || pnop */
67 #define PLT0_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */
68
69 #define PLT0_PIC_ENTRY_WORD0 0xa4cc0004 /* ld r4, @(4,r12) */
70 #define PLT0_PIC_ENTRY_WORD1 0xa6cc0008 /* ld r6, @(8,r12) */
71 #define PLT0_PIC_ENTRY_WORD2 0x1fc6f000 /* jmp r6 || nop */
72 #define PLT0_PIC_ENTRY_WORD3 PLT_EMPTY /* RIE -> RIE */
73 #define PLT0_PIC_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */
74
75 #define PLT_ENTRY_WORD0 0xe6000000 /* ld24 r6, .name_in_GOT */
76 #define PLT_ENTRY_WORD1 0x06acf000 /* add r6, r12 || nop */
77 #define PLT_ENTRY_WORD0b 0xd6c00000 /* seth r6, #high(.name_in_GOT) */
78 #define PLT_ENTRY_WORD1b 0x86e60000 /* or3 r6, r6, #low(.name_in_GOT) */
79 #define PLT_ENTRY_WORD2 0x26c61fc6 /* ld r6, @r6 -> jmp r6 */
80 #define PLT_ENTRY_WORD3 0xe5000000 /* ld24 r5, $offset */
81 #define PLT_ENTRY_WORD4 0xff000000 /* bra .plt0. */
82
83
84 /* Utility to actually perform an R_M32R_10_PCREL reloc. */
85
86 static bfd_reloc_status_type
m32r_elf_do_10_pcrel_reloc(bfd * abfd,reloc_howto_type * howto,asection * input_section,bfd_byte * data,bfd_vma offset,asection * symbol_section ATTRIBUTE_UNUSED,bfd_vma symbol_value,bfd_vma addend)87 m32r_elf_do_10_pcrel_reloc (bfd *abfd,
88 reloc_howto_type *howto,
89 asection *input_section,
90 bfd_byte *data,
91 bfd_vma offset,
92 asection *symbol_section ATTRIBUTE_UNUSED,
93 bfd_vma symbol_value,
94 bfd_vma addend)
95 {
96 bfd_signed_vma relocation;
97 unsigned long x;
98 bfd_reloc_status_type status;
99
100 /* Sanity check the address (offset in section). */
101 if (offset > bfd_get_section_limit (abfd, input_section))
102 return bfd_reloc_outofrange;
103
104 relocation = symbol_value + addend;
105 /* Make it pc relative. */
106 relocation -= (input_section->output_section->vma
107 + input_section->output_offset);
108 /* These jumps mask off the lower two bits of the current address
109 before doing pcrel calculations. */
110 relocation -= (offset & -(bfd_vma) 4);
111
112 if (relocation < -0x200 || relocation > 0x1ff)
113 status = bfd_reloc_overflow;
114 else
115 status = bfd_reloc_ok;
116
117 x = bfd_get_16 (abfd, data + offset);
118 relocation >>= howto->rightshift;
119 relocation <<= howto->bitpos;
120 x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask);
121 bfd_put_16 (abfd, (bfd_vma) x, data + offset);
122
123 return status;
124 }
125
126 /* Handle the R_M32R_10_PCREL reloc. */
127
128 static bfd_reloc_status_type
m32r_elf_10_pcrel_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)129 m32r_elf_10_pcrel_reloc (bfd * abfd,
130 arelent * reloc_entry,
131 asymbol * symbol,
132 void * data,
133 asection * input_section,
134 bfd * output_bfd,
135 char ** error_message ATTRIBUTE_UNUSED)
136 {
137 /* This part is from bfd_elf_generic_reloc. */
138 if (output_bfd != NULL
139 && (symbol->flags & BSF_SECTION_SYM) == 0
140 && (! reloc_entry->howto->partial_inplace
141 || reloc_entry->addend == 0))
142 {
143 reloc_entry->address += input_section->output_offset;
144 return bfd_reloc_ok;
145 }
146
147 if (output_bfd != NULL)
148 /* FIXME: See bfd_perform_relocation. Is this right? */
149 return bfd_reloc_continue;
150
151 return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto,
152 input_section,
153 data, reloc_entry->address,
154 symbol->section,
155 (symbol->value
156 + symbol->section->output_section->vma
157 + symbol->section->output_offset),
158 reloc_entry->addend);
159 }
160
161 /* Do generic partial_inplace relocation.
162 This is a local replacement for bfd_elf_generic_reloc. */
163
164 static bfd_reloc_status_type
m32r_elf_generic_reloc(bfd * input_bfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)165 m32r_elf_generic_reloc (bfd *input_bfd,
166 arelent *reloc_entry,
167 asymbol *symbol,
168 void * data,
169 asection *input_section,
170 bfd *output_bfd,
171 char **error_message ATTRIBUTE_UNUSED)
172 {
173 bfd_reloc_status_type ret;
174 bfd_vma relocation;
175 bfd_byte *inplace_address;
176
177 /* This part is from bfd_elf_generic_reloc.
178 If we're relocating, and this an external symbol, we don't want
179 to change anything. */
180 if (output_bfd != NULL
181 && (symbol->flags & BSF_SECTION_SYM) == 0
182 && reloc_entry->addend == 0)
183 {
184 reloc_entry->address += input_section->output_offset;
185 return bfd_reloc_ok;
186 }
187
188 /* Now do the reloc in the usual way.
189 ??? It would be nice to call bfd_elf_generic_reloc here,
190 but we have partial_inplace set. bfd_elf_generic_reloc will
191 pass the handling back to bfd_install_relocation which will install
192 a section relative addend which is wrong. */
193
194 /* Sanity check the address (offset in section). */
195 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section))
196 return bfd_reloc_outofrange;
197
198 ret = bfd_reloc_ok;
199 if (bfd_is_und_section (symbol->section)
200 && output_bfd == NULL)
201 ret = bfd_reloc_undefined;
202
203 if (bfd_is_com_section (symbol->section)
204 || output_bfd != NULL)
205 relocation = 0;
206 else
207 relocation = symbol->value;
208
209 /* Only do this for a final link. */
210 if (output_bfd == NULL)
211 {
212 relocation += symbol->section->output_section->vma;
213 relocation += symbol->section->output_offset;
214 }
215
216 relocation += reloc_entry->addend;
217 inplace_address = (bfd_byte *) data + reloc_entry->address;
218
219 #define DOIT(x) \
220 x = ( (x & ~reloc_entry->howto->dst_mask) | \
221 (((x & reloc_entry->howto->src_mask) + relocation) & \
222 reloc_entry->howto->dst_mask))
223
224 switch (reloc_entry->howto->size)
225 {
226 case 1:
227 {
228 short x = bfd_get_16 (input_bfd, inplace_address);
229 DOIT (x);
230 bfd_put_16 (input_bfd, (bfd_vma) x, inplace_address);
231 }
232 break;
233 case 2:
234 {
235 unsigned long x = bfd_get_32 (input_bfd, inplace_address);
236 DOIT (x);
237 bfd_put_32 (input_bfd, (bfd_vma)x , inplace_address);
238 }
239 break;
240 default:
241 BFD_ASSERT (0);
242 }
243
244 if (output_bfd != NULL)
245 reloc_entry->address += input_section->output_offset;
246
247 return ret;
248 }
249
250 /* Handle the R_M32R_SDA16 reloc.
251 This reloc is used to compute the address of objects in the small data area
252 and to perform loads and stores from that area.
253 The lower 16 bits are sign extended and added to the register specified
254 in the instruction, which is assumed to point to _SDA_BASE_. */
255
256 static bfd_reloc_status_type
m32r_elf_sda16_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)257 m32r_elf_sda16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
258 arelent *reloc_entry,
259 asymbol *symbol,
260 void * data ATTRIBUTE_UNUSED,
261 asection *input_section,
262 bfd *output_bfd,
263 char **error_message ATTRIBUTE_UNUSED)
264 {
265 /* This part is from bfd_elf_generic_reloc. */
266 if (output_bfd != NULL
267 && (symbol->flags & BSF_SECTION_SYM) == 0
268 && (! reloc_entry->howto->partial_inplace
269 || reloc_entry->addend == 0))
270 {
271 reloc_entry->address += input_section->output_offset;
272 return bfd_reloc_ok;
273 }
274
275 if (output_bfd != NULL)
276 /* FIXME: See bfd_perform_relocation. Is this right? */
277 return bfd_reloc_continue;
278
279 /* FIXME: not sure what to do here yet. But then again, the linker
280 may never call us. */
281 abort ();
282 }
283
284
285 /* Handle the R_M32R_HI16_[SU]LO relocs.
286 HI16_SLO is for the add3 and load/store with displacement instructions.
287 HI16_ULO is for the or3 instruction.
288 For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to
289 the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then
290 we must add one to the high 16 bytes (which will get subtracted off when
291 the low 16 bits are added).
292 These relocs have to be done in combination with an R_M32R_LO16 reloc
293 because there is a carry from the LO16 to the HI16. Here we just save
294 the information we need; we do the actual relocation when we see the LO16.
295 This code is copied from the elf32-mips.c. We also support an arbitrary
296 number of HI16 relocs to be associated with a single LO16 reloc. The
297 assembler sorts the relocs to ensure each HI16 immediately precedes its
298 LO16. However if there are multiple copies, the assembler may not find
299 the real LO16 so it picks the first one it finds. */
300
301 struct m32r_hi16
302 {
303 struct m32r_hi16 *next;
304 bfd_byte *addr;
305 bfd_vma addend;
306 };
307
308 /* FIXME: This should not be a static variable. */
309
310 static struct m32r_hi16 *m32r_hi16_list;
311
312 static bfd_reloc_status_type
m32r_elf_hi16_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)313 m32r_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
314 arelent *reloc_entry,
315 asymbol *symbol,
316 void * data,
317 asection *input_section,
318 bfd *output_bfd,
319 char **error_message ATTRIBUTE_UNUSED)
320 {
321 bfd_reloc_status_type ret;
322 bfd_vma relocation;
323 struct m32r_hi16 *n;
324
325 /* This part is from bfd_elf_generic_reloc.
326 If we're relocating, and this an external symbol, we don't want
327 to change anything. */
328 if (output_bfd != NULL
329 && (symbol->flags & BSF_SECTION_SYM) == 0
330 && reloc_entry->addend == 0)
331 {
332 reloc_entry->address += input_section->output_offset;
333 return bfd_reloc_ok;
334 }
335
336 /* Sanity check the address (offset in section). */
337 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
338 return bfd_reloc_outofrange;
339
340 ret = bfd_reloc_ok;
341 if (bfd_is_und_section (symbol->section)
342 && output_bfd == NULL)
343 ret = bfd_reloc_undefined;
344
345 if (bfd_is_com_section (symbol->section))
346 relocation = 0;
347 else
348 relocation = symbol->value;
349
350 relocation += symbol->section->output_section->vma;
351 relocation += symbol->section->output_offset;
352 relocation += reloc_entry->addend;
353
354 /* Save the information, and let LO16 do the actual relocation. */
355 n = bfd_malloc ((bfd_size_type) sizeof *n);
356 if (n == NULL)
357 return bfd_reloc_outofrange;
358 n->addr = (bfd_byte *) data + reloc_entry->address;
359 n->addend = relocation;
360 n->next = m32r_hi16_list;
361 m32r_hi16_list = n;
362
363 if (output_bfd != NULL)
364 reloc_entry->address += input_section->output_offset;
365
366 return ret;
367 }
368
369 /* Handle an M32R ELF HI16 reloc. */
370
371 static void
m32r_elf_relocate_hi16(bfd * input_bfd,int type,Elf_Internal_Rela * relhi,Elf_Internal_Rela * rello,bfd_byte * contents,bfd_vma addend)372 m32r_elf_relocate_hi16 (bfd *input_bfd,
373 int type,
374 Elf_Internal_Rela *relhi,
375 Elf_Internal_Rela *rello,
376 bfd_byte *contents,
377 bfd_vma addend)
378 {
379 unsigned long insn;
380 bfd_vma addlo;
381
382 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
383
384 addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
385 if (type == R_M32R_HI16_SLO)
386 addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000;
387 else
388 addlo &= 0xffff;
389
390 addend += ((insn & 0xffff) << 16) + addlo;
391
392 /* Reaccount for sign extension of low part. */
393 if (type == R_M32R_HI16_SLO
394 && (addend & 0x8000) != 0)
395 addend += 0x10000;
396
397 bfd_put_32 (input_bfd,
398 (insn & 0xffff0000) | ((addend >> 16) & 0xffff),
399 contents + relhi->r_offset);
400 }
401
402 /* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit
403 inplace relocation; this function exists in order to do the
404 R_M32R_HI16_[SU]LO relocation described above. */
405
406 static bfd_reloc_status_type
m32r_elf_lo16_reloc(bfd * input_bfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)407 m32r_elf_lo16_reloc (bfd *input_bfd,
408 arelent *reloc_entry,
409 asymbol *symbol,
410 void * data,
411 asection *input_section,
412 bfd *output_bfd,
413 char **error_message)
414 {
415 /* This part is from bfd_elf_generic_reloc.
416 If we're relocating, and this an external symbol, we don't want
417 to change anything. */
418 if (output_bfd != NULL
419 && (symbol->flags & BSF_SECTION_SYM) == 0
420 && reloc_entry->addend == 0)
421 {
422 reloc_entry->address += input_section->output_offset;
423 return bfd_reloc_ok;
424 }
425
426 if (m32r_hi16_list != NULL)
427 {
428 struct m32r_hi16 *l;
429
430 l = m32r_hi16_list;
431 while (l != NULL)
432 {
433 unsigned long insn;
434 unsigned long val;
435 unsigned long vallo;
436 struct m32r_hi16 *next;
437
438 /* Do the HI16 relocation. Note that we actually don't need
439 to know anything about the LO16 itself, except where to
440 find the low 16 bits of the addend needed by the LO16. */
441 insn = bfd_get_32 (input_bfd, l->addr);
442 vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address)
443 & 0xffff) ^ 0x8000) - 0x8000;
444 val = ((insn & 0xffff) << 16) + vallo;
445 val += l->addend;
446
447 /* Reaccount for sign extension of low part. */
448 if ((val & 0x8000) != 0)
449 val += 0x10000;
450
451 insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff);
452 bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr);
453
454 next = l->next;
455 free (l);
456 l = next;
457 }
458
459 m32r_hi16_list = NULL;
460 }
461
462 /* Now do the LO16 reloc in the usual way.
463 ??? It would be nice to call bfd_elf_generic_reloc here,
464 but we have partial_inplace set. bfd_elf_generic_reloc will
465 pass the handling back to bfd_install_relocation which will install
466 a section relative addend which is wrong. */
467 return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data,
468 input_section, output_bfd, error_message);
469 }
470
471
472 static reloc_howto_type m32r_elf_howto_table[] =
473 {
474 /* This reloc does nothing. */
475 HOWTO (R_M32R_NONE, /* type */
476 0, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 32, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_bitfield, /* complain_on_overflow */
482 bfd_elf_generic_reloc, /* special_function */
483 "R_M32R_NONE", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* A 16 bit absolute relocation. */
490 HOWTO (R_M32R_16, /* type */
491 0, /* rightshift */
492 1, /* size (0 = byte, 1 = short, 2 = long) */
493 16, /* bitsize */
494 FALSE, /* pc_relative */
495 0, /* bitpos */
496 complain_overflow_bitfield, /* complain_on_overflow */
497 m32r_elf_generic_reloc,/* special_function */
498 "R_M32R_16", /* name */
499 TRUE, /* partial_inplace */
500 0xffff, /* src_mask */
501 0xffff, /* dst_mask */
502 FALSE), /* pcrel_offset */
503
504 /* A 32 bit absolute relocation. */
505 HOWTO (R_M32R_32, /* type */
506 0, /* rightshift */
507 2, /* size (0 = byte, 1 = short, 2 = long) */
508 32, /* bitsize */
509 FALSE, /* pc_relative */
510 0, /* bitpos */
511 complain_overflow_bitfield, /* complain_on_overflow */
512 m32r_elf_generic_reloc,/* special_function */
513 "R_M32R_32", /* name */
514 TRUE, /* partial_inplace */
515 0xffffffff, /* src_mask */
516 0xffffffff, /* dst_mask */
517 FALSE), /* pcrel_offset */
518
519 /* A 24 bit address. */
520 HOWTO (R_M32R_24, /* type */
521 0, /* rightshift */
522 2, /* size (0 = byte, 1 = short, 2 = long) */
523 24, /* bitsize */
524 FALSE, /* pc_relative */
525 0, /* bitpos */
526 complain_overflow_unsigned, /* complain_on_overflow */
527 m32r_elf_generic_reloc,/* special_function */
528 "R_M32R_24", /* name */
529 TRUE, /* partial_inplace */
530 0xffffff, /* src_mask */
531 0xffffff, /* dst_mask */
532 FALSE), /* pcrel_offset */
533
534 /* An PC Relative 10-bit relocation, shifted by 2.
535 This reloc is complicated because relocations are relative to pc & -4.
536 i.e. branches in the right insn slot use the address of the left insn
537 slot for pc. */
538 /* ??? It's not clear whether this should have partial_inplace set or not.
539 Branch relaxing in the assembler can store the addend in the insn,
540 and if bfd_install_relocation gets called the addend may get added
541 again. */
542 HOWTO (R_M32R_10_PCREL, /* type */
543 2, /* rightshift */
544 1, /* size (0 = byte, 1 = short, 2 = long) */
545 10, /* bitsize */
546 TRUE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_signed, /* complain_on_overflow */
549 m32r_elf_10_pcrel_reloc, /* special_function */
550 "R_M32R_10_PCREL", /* name */
551 FALSE, /* partial_inplace */
552 0xff, /* src_mask */
553 0xff, /* dst_mask */
554 TRUE), /* pcrel_offset */
555
556 /* A relative 18 bit relocation, right shifted by 2. */
557 HOWTO (R_M32R_18_PCREL, /* type */
558 2, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_M32R_18_PCREL", /* name */
566 FALSE, /* partial_inplace */
567 0xffff, /* src_mask */
568 0xffff, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* A relative 26 bit relocation, right shifted by 2. */
572 /* ??? It's not clear whether this should have partial_inplace set or not.
573 Branch relaxing in the assembler can store the addend in the insn,
574 and if bfd_install_relocation gets called the addend may get added
575 again. */
576 HOWTO (R_M32R_26_PCREL, /* type */
577 2, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 26, /* bitsize */
580 TRUE, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_signed, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_M32R_26_PCREL", /* name */
585 FALSE, /* partial_inplace */
586 0xffffff, /* src_mask */
587 0xffffff, /* dst_mask */
588 TRUE), /* pcrel_offset */
589
590 /* High 16 bits of address when lower 16 is or'd in. */
591 HOWTO (R_M32R_HI16_ULO, /* type */
592 16, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 16, /* bitsize */
595 FALSE, /* pc_relative */
596 0, /* bitpos */
597 complain_overflow_dont, /* complain_on_overflow */
598 m32r_elf_hi16_reloc, /* special_function */
599 "R_M32R_HI16_ULO", /* name */
600 TRUE, /* partial_inplace */
601 0x0000ffff, /* src_mask */
602 0x0000ffff, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 /* High 16 bits of address when lower 16 is added in. */
606 HOWTO (R_M32R_HI16_SLO, /* type */
607 16, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 16, /* bitsize */
610 FALSE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_dont, /* complain_on_overflow */
613 m32r_elf_hi16_reloc, /* special_function */
614 "R_M32R_HI16_SLO", /* name */
615 TRUE, /* partial_inplace */
616 0x0000ffff, /* src_mask */
617 0x0000ffff, /* dst_mask */
618 FALSE), /* pcrel_offset */
619
620 /* Lower 16 bits of address. */
621 HOWTO (R_M32R_LO16, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 16, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_dont, /* complain_on_overflow */
628 m32r_elf_lo16_reloc, /* special_function */
629 "R_M32R_LO16", /* name */
630 TRUE, /* partial_inplace */
631 0x0000ffff, /* src_mask */
632 0x0000ffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* Small data area 16 bits offset. */
636 HOWTO (R_M32R_SDA16, /* type */
637 0, /* rightshift */
638 2, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_signed, /* complain_on_overflow */
643 m32r_elf_sda16_reloc, /* special_function */
644 "R_M32R_SDA16", /* name */
645 TRUE, /* partial_inplace */ /* FIXME: correct? */
646 0x0000ffff, /* src_mask */
647 0x0000ffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* GNU extension to record C++ vtable hierarchy. */
651 HOWTO (R_M32R_GNU_VTINHERIT, /* type */
652 0, /* rightshift */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
654 0, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 NULL, /* special_function */
659 "R_M32R_GNU_VTINHERIT", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* GNU extension to record C++ vtable member usage. */
666 HOWTO (R_M32R_GNU_VTENTRY, /* type */
667 0, /* rightshift */
668 2, /* size (0 = byte, 1 = short, 2 = long) */
669 0, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
674 "R_M32R_GNU_VTENTRY", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 EMPTY_HOWTO (13),
681 EMPTY_HOWTO (14),
682 EMPTY_HOWTO (15),
683 EMPTY_HOWTO (16),
684 EMPTY_HOWTO (17),
685 EMPTY_HOWTO (18),
686 EMPTY_HOWTO (19),
687 EMPTY_HOWTO (20),
688 EMPTY_HOWTO (21),
689 EMPTY_HOWTO (22),
690 EMPTY_HOWTO (23),
691 EMPTY_HOWTO (24),
692 EMPTY_HOWTO (25),
693 EMPTY_HOWTO (26),
694 EMPTY_HOWTO (27),
695 EMPTY_HOWTO (28),
696 EMPTY_HOWTO (29),
697 EMPTY_HOWTO (30),
698 EMPTY_HOWTO (31),
699 EMPTY_HOWTO (32),
700
701 /* A 16 bit absolute relocation. */
702 HOWTO (R_M32R_16_RELA, /* type */
703 0, /* rightshift */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
705 16, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_bitfield, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_M32R_16_RELA", /* name */
711 FALSE, /* partial_inplace */
712 0xffff, /* src_mask */
713 0xffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* A 32 bit absolute relocation. */
717 HOWTO (R_M32R_32_RELA, /* type */
718 0, /* rightshift */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
720 32, /* bitsize */
721 FALSE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_bitfield, /* complain_on_overflow */
724 bfd_elf_generic_reloc,/* special_function */
725 "R_M32R_32_RELA", /* name */
726 FALSE, /* partial_inplace */
727 0xffffffff, /* src_mask */
728 0xffffffff, /* dst_mask */
729 FALSE), /* pcrel_offset */
730
731 /* A 24 bit address. */
732 HOWTO (R_M32R_24_RELA, /* type */
733 0, /* rightshift */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
735 24, /* bitsize */
736 FALSE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_unsigned, /* complain_on_overflow */
739 bfd_elf_generic_reloc,/* special_function */
740 "R_M32R_24_RELA", /* name */
741 FALSE, /* partial_inplace */
742 0xffffff, /* src_mask */
743 0xffffff, /* dst_mask */
744 FALSE), /* pcrel_offset */
745
746 HOWTO (R_M32R_10_PCREL_RELA, /* type */
747 2, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 10, /* bitsize */
750 TRUE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 m32r_elf_10_pcrel_reloc, /* special_function */
754 "R_M32R_10_PCREL_RELA",/* name */
755 FALSE, /* partial_inplace */
756 0xff, /* src_mask */
757 0xff, /* dst_mask */
758 TRUE), /* pcrel_offset */
759
760 /* A relative 18 bit relocation, right shifted by 2. */
761 HOWTO (R_M32R_18_PCREL_RELA, /* type */
762 2, /* rightshift */
763 2, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 TRUE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_signed, /* complain_on_overflow */
768 bfd_elf_generic_reloc, /* special_function */
769 "R_M32R_18_PCREL_RELA",/* name */
770 FALSE, /* partial_inplace */
771 0xffff, /* src_mask */
772 0xffff, /* dst_mask */
773 TRUE), /* pcrel_offset */
774
775 /* A relative 26 bit relocation, right shifted by 2. */
776 HOWTO (R_M32R_26_PCREL_RELA, /* type */
777 2, /* rightshift */
778 2, /* size (0 = byte, 1 = short, 2 = long) */
779 26, /* bitsize */
780 TRUE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 bfd_elf_generic_reloc, /* special_function */
784 "R_M32R_26_PCREL_RELA",/* name */
785 FALSE, /* partial_inplace */
786 0xffffff, /* src_mask */
787 0xffffff, /* dst_mask */
788 TRUE), /* pcrel_offset */
789
790 /* High 16 bits of address when lower 16 is or'd in. */
791 HOWTO (R_M32R_HI16_ULO_RELA, /* type */
792 16, /* rightshift */
793 2, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_M32R_HI16_ULO_RELA",/* name */
800 FALSE, /* partial_inplace */
801 0x0000ffff, /* src_mask */
802 0x0000ffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* High 16 bits of address when lower 16 is added in. */
806 HOWTO (R_M32R_HI16_SLO_RELA, /* type */
807 16, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_M32R_HI16_SLO_RELA",/* name */
815 FALSE, /* partial_inplace */
816 0x0000ffff, /* src_mask */
817 0x0000ffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* Lower 16 bits of address. */
821 HOWTO (R_M32R_LO16_RELA, /* type */
822 0, /* rightshift */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
824 16, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_M32R_LO16_RELA", /* name */
830 FALSE, /* partial_inplace */
831 0x0000ffff, /* src_mask */
832 0x0000ffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* Small data area 16 bits offset. */
836 HOWTO (R_M32R_SDA16_RELA, /* type */
837 0, /* rightshift */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_signed, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_M32R_SDA16_RELA", /* name */
845 TRUE, /* partial_inplace */ /* FIXME: correct? */
846 0x0000ffff, /* src_mask */
847 0x0000ffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* GNU extension to record C++ vtable hierarchy. */
851 HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */
852 0, /* rightshift */
853 2, /* size (0 = byte, 1 = short, 2 = long) */
854 0, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 NULL, /* special_function */
859 "R_M32R_RELA_GNU_VTINHERIT", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 0, /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* GNU extension to record C++ vtable member usage. */
866 HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */
867 0, /* rightshift */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
869 0, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
874 "R_M32R_RELA_GNU_VTENTRY", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 0, /* dst_mask */
878 FALSE), /* pcrel_offset */
879
880 /* A 32 bit PC relative relocation. */
881 HOWTO (R_M32R_REL32, /* type */
882 0, /* rightshift */
883 2, /* size (0 = byte, 1 = short, 2 = long) */
884 32, /* bitsize */
885 TRUE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_bitfield, /* complain_on_overflow */
888 bfd_elf_generic_reloc,/* special_function */
889 "R_M32R_REL32", /* name */
890 FALSE, /* partial_inplace */
891 0xffffffff, /* src_mask */
892 0xffffffff, /* dst_mask */
893 TRUE), /* pcrel_offset */
894
895 EMPTY_HOWTO (46),
896 EMPTY_HOWTO (47),
897
898 /* Like R_M32R_24, but referring to the GOT table entry for
899 the symbol. */
900 HOWTO (R_M32R_GOT24, /* type */
901 0, /* rightshift */
902 2, /* size (0 = byte, 1 = short, 2 = long) */
903 24, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_unsigned, /* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_M32R_GOT24", /* name */
909 FALSE, /* partial_inplace */
910 0xffffff, /* src_mask */
911 0xffffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* Like R_M32R_PCREL, but referring to the procedure linkage table
915 entry for the symbol. */
916 HOWTO (R_M32R_26_PLTREL, /* type */
917 2, /* rightshift */
918 2, /* size (0 = byte, 1 = short, 2 = long) */
919 24, /* bitsize */
920 TRUE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_signed, /* complain_on_overflow */
923 bfd_elf_generic_reloc, /* special_function */
924 "R_M32R_26_PLTREL", /* name */
925 FALSE, /* partial_inplace */
926 0xffffff, /* src_mask */
927 0xffffff, /* dst_mask */
928 TRUE), /* pcrel_offset */
929
930 /* This is used only by the dynamic linker. The symbol should exist
931 both in the object being run and in some shared library. The
932 dynamic linker copies the data addressed by the symbol from the
933 shared library into the object, because the object being
934 run has to have the data at some particular address. */
935 HOWTO (R_M32R_COPY, /* type */
936 0, /* rightshift */
937 2, /* size (0 = byte, 1 = short, 2 = long) */
938 32, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_bitfield, /* complain_on_overflow */
942 bfd_elf_generic_reloc, /* special_function */
943 "R_M32R_COPY", /* name */
944 FALSE, /* partial_inplace */
945 0xffffffff, /* src_mask */
946 0xffffffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like R_M32R_24, but used when setting global offset table
950 entries. */
951 HOWTO (R_M32R_GLOB_DAT, /* type */
952 0, /* rightshift */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
954 32, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_bitfield, /* complain_on_overflow */
958 bfd_elf_generic_reloc, /* special_function */
959 "R_M32R_GLOB_DAT", /* name */
960 FALSE, /* partial_inplace */
961 0xffffffff, /* src_mask */
962 0xffffffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* Marks a procedure linkage table entry for a symbol. */
966 HOWTO (R_M32R_JMP_SLOT, /* type */
967 0, /* rightshift */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
969 32, /* bitsize */
970 FALSE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_bitfield, /* complain_on_overflow */
973 bfd_elf_generic_reloc, /* special_function */
974 "R_M32R_JMP_SLOT", /* name */
975 FALSE, /* partial_inplace */
976 0xffffffff, /* src_mask */
977 0xffffffff, /* dst_mask */
978 FALSE), /* pcrel_offset */
979
980 /* Used only by the dynamic linker. When the object is run, this
981 longword is set to the load address of the object, plus the
982 addend. */
983 HOWTO (R_M32R_RELATIVE, /* type */
984 0, /* rightshift */
985 2, /* size (0 = byte, 1 = short, 2 = long) */
986 32, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_bitfield, /* complain_on_overflow */
990 bfd_elf_generic_reloc, /* special_function */
991 "R_M32R_RELATIVE", /* name */
992 FALSE, /* partial_inplace */
993 0xffffffff, /* src_mask */
994 0xffffffff, /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 HOWTO (R_M32R_GOTOFF, /* type */
998 0, /* rightshift */
999 2, /* size (0 = byte, 1 = short, 2 = long) */
1000 24, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_bitfield, /* complain_on_overflow */
1004 bfd_elf_generic_reloc, /* special_function */
1005 "R_M32R_GOTOFF", /* name */
1006 FALSE, /* partial_inplace */
1007 0xffffff, /* src_mask */
1008 0xffffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* An PC Relative 24-bit relocation used when setting PIC offset
1012 table register. */
1013 HOWTO (R_M32R_GOTPC24, /* type */
1014 0, /* rightshift */
1015 2, /* size (0 = byte, 1 = short, 2 = long) */
1016 24, /* bitsize */
1017 TRUE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_unsigned, /* complain_on_overflow */
1020 bfd_elf_generic_reloc, /* special_function */
1021 "R_M32R_GOTPC24", /* name */
1022 FALSE, /* partial_inplace */
1023 0xffffff, /* src_mask */
1024 0xffffff, /* dst_mask */
1025 TRUE), /* pcrel_offset */
1026
1027 /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for
1028 the symbol. */
1029 HOWTO (R_M32R_GOT16_HI_ULO, /* type */
1030 16, /* rightshift */
1031 2, /* size (0 = byte, 1 = short, 2 = long) */
1032 16, /* bitsize */
1033 FALSE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont, /* complain_on_overflow */
1036 bfd_elf_generic_reloc, /* special_function */
1037 "R_M32R_GOT16_HI_ULO", /* name */
1038 FALSE, /* partial_inplace */
1039 0x0000ffff, /* src_mask */
1040 0x0000ffff, /* dst_mask */
1041 FALSE), /* pcrel_offset */
1042
1043 /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for
1044 the symbol. */
1045 HOWTO (R_M32R_GOT16_HI_SLO, /* type */
1046 16, /* rightshift */
1047 2, /* size (0 = byte, 1 = short, 2 = long) */
1048 16, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_dont, /* complain_on_overflow */
1052 bfd_elf_generic_reloc, /* special_function */
1053 "R_M32R_GOT16_HI_SLO", /* name */
1054 FALSE, /* partial_inplace */
1055 0x0000ffff, /* src_mask */
1056 0x0000ffff, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* Like R_M32R_LO16, but referring to the GOT table entry for
1060 the symbol. */
1061 HOWTO (R_M32R_GOT16_LO, /* type */
1062 0, /* rightshift */
1063 2, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_dont, /* complain_on_overflow */
1068 bfd_elf_generic_reloc, /* special_function */
1069 "R_M32R_GOT16_LO", /* name */
1070 FALSE, /* partial_inplace */
1071 0x0000ffff, /* src_mask */
1072 0x0000ffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* An PC Relative relocation used when setting PIC offset table register.
1076 Like R_M32R_HI16_ULO, but referring to the GOT table entry for
1077 the symbol. */
1078 HOWTO (R_M32R_GOTPC_HI_ULO, /* type */
1079 16, /* rightshift */
1080 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 bfd_elf_generic_reloc, /* special_function */
1086 "R_M32R_GOTPC_HI_ULO", /* name */
1087 FALSE, /* partial_inplace */
1088 0x0000ffff, /* src_mask */
1089 0x0000ffff, /* dst_mask */
1090 TRUE), /* pcrel_offset */
1091
1092 /* An PC Relative relocation used when setting PIC offset table register.
1093 Like R_M32R_HI16_SLO, but referring to the GOT table entry for
1094 the symbol. */
1095 HOWTO (R_M32R_GOTPC_HI_SLO, /* type */
1096 16, /* rightshift */
1097 2, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 bfd_elf_generic_reloc, /* special_function */
1103 "R_M32R_GOTPC_HI_SLO", /* name */
1104 FALSE, /* partial_inplace */
1105 0x0000ffff, /* src_mask */
1106 0x0000ffff, /* dst_mask */
1107 TRUE), /* pcrel_offset */
1108
1109 /* An PC Relative relocation used when setting PIC offset table register.
1110 Like R_M32R_LO16, but referring to the GOT table entry for
1111 the symbol. */
1112 HOWTO (R_M32R_GOTPC_LO, /* type */
1113 0, /* rightshift */
1114 2, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_dont, /* complain_on_overflow */
1119 bfd_elf_generic_reloc, /* special_function */
1120 "R_M32R_GOTPC_LO", /* name */
1121 FALSE, /* partial_inplace */
1122 0x0000ffff, /* src_mask */
1123 0x0000ffff, /* dst_mask */
1124 TRUE), /* pcrel_offset */
1125
1126 HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */
1127 16, /* rightshift */
1128 2, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 bfd_elf_generic_reloc, /* special_function */
1134 "R_M32R_GOTOFF_HI_ULO",/* name */
1135 FALSE, /* partial_inplace */
1136 0x0000ffff, /* src_mask */
1137 0x0000ffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */
1141 16, /* rightshift */
1142 2, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 FALSE, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 bfd_elf_generic_reloc, /* special_function */
1148 "R_M32R_GOTOFF_HI_SLO",/* name */
1149 FALSE, /* partial_inplace */
1150 0x0000ffff, /* src_mask */
1151 0x0000ffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 HOWTO (R_M32R_GOTOFF_LO, /* type */
1155 0, /* rightshift */
1156 2, /* size (0 = byte, 1 = short, 2 = long) */
1157 16, /* bitsize */
1158 FALSE, /* pc_relative */
1159 0, /* bitpos */
1160 complain_overflow_dont, /* complain_on_overflow */
1161 bfd_elf_generic_reloc, /* special_function */
1162 "R_M32R_GOTOFF_LO", /* name */
1163 FALSE, /* partial_inplace */
1164 0x0000ffff, /* src_mask */
1165 0x0000ffff, /* dst_mask */
1166 FALSE), /* pcrel_offset */
1167 };
1168
1169 /* Map BFD reloc types to M32R ELF reloc types. */
1170
1171 struct m32r_reloc_map
1172 {
1173 bfd_reloc_code_real_type bfd_reloc_val;
1174 unsigned char elf_reloc_val;
1175 };
1176
1177 #ifdef USE_M32R_OLD_RELOC
1178 static const struct m32r_reloc_map m32r_reloc_map_old[] =
1179 {
1180 { BFD_RELOC_NONE, R_M32R_NONE },
1181 { BFD_RELOC_16, R_M32R_16 },
1182 { BFD_RELOC_32, R_M32R_32 },
1183 { BFD_RELOC_M32R_24, R_M32R_24 },
1184 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL },
1185 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL },
1186 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL },
1187 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO },
1188 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO },
1189 { BFD_RELOC_M32R_LO16, R_M32R_LO16 },
1190 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 },
1191 { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT },
1192 { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY },
1193 };
1194 #else
1195 static const struct m32r_reloc_map m32r_reloc_map[] =
1196 {
1197 { BFD_RELOC_NONE, R_M32R_NONE },
1198 { BFD_RELOC_16, R_M32R_16_RELA },
1199 { BFD_RELOC_32, R_M32R_32_RELA },
1200 { BFD_RELOC_M32R_24, R_M32R_24_RELA },
1201 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA },
1202 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA },
1203 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA },
1204 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA },
1205 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA },
1206 { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA },
1207 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA },
1208 { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT },
1209 { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY },
1210 { BFD_RELOC_32_PCREL, R_M32R_REL32 },
1211
1212 { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 },
1213 { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL },
1214 { BFD_RELOC_M32R_COPY, R_M32R_COPY },
1215 { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT },
1216 { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT },
1217 { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE },
1218 { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF },
1219 { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 },
1220 { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO },
1221 { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO },
1222 { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO },
1223 { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO },
1224 { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO },
1225 { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO },
1226 { BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO },
1227 { BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO },
1228 { BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO },
1229 };
1230 #endif
1231
1232 static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)1233 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1234 bfd_reloc_code_real_type code)
1235 {
1236 unsigned int i;
1237
1238 #ifdef USE_M32R_OLD_RELOC
1239 for (i = 0;
1240 i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map);
1241 i++)
1242 if (m32r_reloc_map_old[i].bfd_reloc_val == code)
1243 return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val];
1244
1245 #else /* ! USE_M32R_OLD_RELOC */
1246
1247 for (i = 0;
1248 i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map);
1249 i++)
1250 if (m32r_reloc_map[i].bfd_reloc_val == code)
1251 return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val];
1252 #endif
1253
1254 return NULL;
1255 }
1256
1257 static reloc_howto_type *
bfd_elf32_bfd_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)1258 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1259 const char *r_name)
1260 {
1261 unsigned int i;
1262
1263 for (i = 0;
1264 i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]);
1265 i++)
1266 if (m32r_elf_howto_table[i].name != NULL
1267 && strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0)
1268 return &m32r_elf_howto_table[i];
1269
1270 return NULL;
1271 }
1272
1273 /* Set the howto pointer for an M32R ELF reloc. */
1274
1275 static void
m32r_info_to_howto_rel(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)1276 m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
1277 arelent *cache_ptr,
1278 Elf_Internal_Rela *dst)
1279 {
1280 unsigned int r_type;
1281
1282 r_type = ELF32_R_TYPE (dst->r_info);
1283 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) <= (unsigned int) R_M32R_GNU_VTENTRY);
1284 cache_ptr->howto = &m32r_elf_howto_table[r_type];
1285 }
1286
1287 static void
m32r_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)1288 m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1289 arelent *cache_ptr,
1290 Elf_Internal_Rela *dst)
1291 {
1292 BFD_ASSERT ((ELF32_R_TYPE(dst->r_info) == (unsigned int) R_M32R_NONE)
1293 || ((ELF32_R_TYPE(dst->r_info) > (unsigned int) R_M32R_GNU_VTENTRY)
1294 && (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_M32R_max)));
1295 cache_ptr->howto = &m32r_elf_howto_table[ELF32_R_TYPE(dst->r_info)];
1296 }
1297
1298
1299 /* Given a BFD section, try to locate the corresponding ELF section
1300 index. */
1301
1302 static bfd_boolean
_bfd_m32r_elf_section_from_bfd_section(bfd * abfd ATTRIBUTE_UNUSED,asection * sec,int * retval)1303 _bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
1304 asection *sec,
1305 int *retval)
1306 {
1307 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
1308 {
1309 *retval = SHN_M32R_SCOMMON;
1310 return TRUE;
1311 }
1312 return FALSE;
1313 }
1314
1315 /* M32R ELF uses two common sections. One is the usual one, and the other
1316 is for small objects. All the small objects are kept together, and then
1317 referenced via one register, which yields faster assembler code. It is
1318 up to the compiler to emit an instruction to load the register with
1319 _SDA_BASE. This is what we use for the small common section. This
1320 approach is copied from elf32-mips.c. */
1321 static asection m32r_elf_scom_section;
1322 static asymbol m32r_elf_scom_symbol;
1323 static asymbol *m32r_elf_scom_symbol_ptr;
1324
1325 /* Handle the special M32R section numbers that a symbol may use. */
1326
1327 static void
_bfd_m32r_elf_symbol_processing(bfd * abfd ATTRIBUTE_UNUSED,asymbol * asym)1328 _bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
1329 {
1330 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
1331
1332 switch (elfsym->internal_elf_sym.st_shndx)
1333 {
1334 case SHN_M32R_SCOMMON:
1335 if (m32r_elf_scom_section.name == NULL)
1336 {
1337 /* Initialize the small common section. */
1338 m32r_elf_scom_section.name = ".scommon";
1339 m32r_elf_scom_section.flags = SEC_IS_COMMON;
1340 m32r_elf_scom_section.output_section = &m32r_elf_scom_section;
1341 m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol;
1342 m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr;
1343 m32r_elf_scom_symbol.name = ".scommon";
1344 m32r_elf_scom_symbol.flags = BSF_SECTION_SYM;
1345 m32r_elf_scom_symbol.section = &m32r_elf_scom_section;
1346 m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol;
1347 }
1348 asym->section = &m32r_elf_scom_section;
1349 asym->value = elfsym->internal_elf_sym.st_size;
1350 break;
1351 }
1352 }
1353
1354 /* Hook called by the linker routine which adds symbols from an object
1355 file. We must handle the special M32R section numbers here.
1356 We also keep watching for whether we need to create the sdata special
1357 linker sections. */
1358
1359 static bfd_boolean
m32r_elf_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)1360 m32r_elf_add_symbol_hook (bfd *abfd,
1361 struct bfd_link_info *info,
1362 Elf_Internal_Sym *sym,
1363 const char **namep,
1364 flagword *flagsp ATTRIBUTE_UNUSED,
1365 asection **secp,
1366 bfd_vma *valp)
1367 {
1368 if (! info->relocatable
1369 && (*namep)[0] == '_' && (*namep)[1] == 'S'
1370 && strcmp (*namep, "_SDA_BASE_") == 0
1371 && is_elf_hash_table (info->hash))
1372 {
1373 /* This is simpler than using _bfd_elf_create_linker_section
1374 (our needs are simpler than ppc's needs). Also
1375 _bfd_elf_create_linker_section currently has a bug where if a .sdata
1376 section already exists a new one is created that follows it which
1377 screws of _SDA_BASE_ address calcs because output_offset != 0. */
1378 struct elf_link_hash_entry *h;
1379 struct bfd_link_hash_entry *bh;
1380 asection *s = bfd_get_section_by_name (abfd, ".sdata");
1381
1382 /* The following code was cobbled from elf32-ppc.c and elflink.c. */
1383 if (s == NULL)
1384 {
1385 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1386 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1387
1388 s = bfd_make_section_anyway_with_flags (abfd, ".sdata",
1389 flags);
1390 if (s == NULL)
1391 return FALSE;
1392 if (! bfd_set_section_alignment (abfd, s, 2))
1393 return FALSE;
1394 }
1395
1396 bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_",
1397 FALSE, FALSE, FALSE);
1398
1399 if ((bh == NULL || bh->type == bfd_link_hash_undefined)
1400 && !(_bfd_generic_link_add_one_symbol (info,
1401 abfd,
1402 "_SDA_BASE_",
1403 BSF_GLOBAL,
1404 s,
1405 (bfd_vma) 32768,
1406 NULL,
1407 FALSE,
1408 get_elf_backend_data (abfd)->collect,
1409 &bh)))
1410 return FALSE;
1411 h = (struct elf_link_hash_entry *) bh;
1412 h->type = STT_OBJECT;
1413 }
1414
1415 switch (sym->st_shndx)
1416 {
1417 case SHN_M32R_SCOMMON:
1418 *secp = bfd_make_section_old_way (abfd, ".scommon");
1419 (*secp)->flags |= SEC_IS_COMMON;
1420 *valp = sym->st_size;
1421 break;
1422 }
1423
1424 return TRUE;
1425 }
1426
1427 /* We have to figure out the SDA_BASE value, so that we can adjust the
1428 symbol value correctly. We look up the symbol _SDA_BASE_ in the output
1429 BFD. If we can't find it, we're stuck. We cache it in the ELF
1430 target data. We don't need to adjust the symbol value for an
1431 external symbol if we are producing relocatable output. */
1432
1433 static bfd_reloc_status_type
m32r_elf_final_sda_base(bfd * output_bfd,struct bfd_link_info * info,const char ** error_message,bfd_vma * psb)1434 m32r_elf_final_sda_base (bfd *output_bfd,
1435 struct bfd_link_info *info,
1436 const char **error_message,
1437 bfd_vma *psb)
1438 {
1439 if (elf_gp (output_bfd) == 0)
1440 {
1441 struct bfd_link_hash_entry *h;
1442
1443 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", FALSE, FALSE, TRUE);
1444 if (h != NULL && h->type == bfd_link_hash_defined)
1445 elf_gp (output_bfd) = (h->u.def.value
1446 + h->u.def.section->output_section->vma
1447 + h->u.def.section->output_offset);
1448 else
1449 {
1450 /* Only get the error once. */
1451 *psb = elf_gp (output_bfd) = 4;
1452 *error_message =
1453 (const char *) _("SDA relocation when _SDA_BASE_ not defined");
1454 return bfd_reloc_dangerous;
1455 }
1456 }
1457 *psb = elf_gp (output_bfd);
1458 return bfd_reloc_ok;
1459 }
1460
1461 /* Return size of a PLT entry. */
1462 #define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE
1463
1464 /* The m32r linker needs to keep track of the number of relocs that it
1465 decides to copy in check_relocs for each symbol. This is so that
1466 it can discard PC relative relocs if it doesn't need them when
1467 linking with -Bsymbolic. We store the information in a field
1468 extending the regular ELF linker hash table. */
1469
1470 /* This structure keeps track of the number of PC relative relocs we
1471 have copied for a given symbol. */
1472
1473 struct elf_m32r_pcrel_relocs_copied
1474 {
1475 /* Next section. */
1476 struct elf_m32r_pcrel_relocs_copied *next;
1477 /* A section in dynobj. */
1478 asection *section;
1479 /* Number of relocs copied in this section. */
1480 bfd_size_type count;
1481 };
1482
1483 /* The sh linker needs to keep track of the number of relocs that it
1484 decides to copy as dynamic relocs in check_relocs for each symbol.
1485 This is so that it can later discard them if they are found to be
1486 unnecessary. We store the information in a field extending the
1487 regular ELF linker hash table. */
1488
1489 struct elf_m32r_dyn_relocs
1490 {
1491 struct elf_m32r_dyn_relocs *next;
1492
1493 /* The input section of the reloc. */
1494 asection *sec;
1495
1496 /* Total number of relocs copied for the input section. */
1497 bfd_size_type count;
1498
1499 /* Number of pc-relative relocs copied for the input section. */
1500 bfd_size_type pc_count;
1501 };
1502
1503
1504 /* m32r ELF linker hash entry. */
1505
1506 struct elf_m32r_link_hash_entry
1507 {
1508 struct elf_link_hash_entry root;
1509
1510 /* Track dynamic relocs copied for this symbol. */
1511 struct elf_m32r_dyn_relocs *dyn_relocs;
1512 };
1513
1514 /* m32r ELF linker hash table. */
1515
1516 struct elf_m32r_link_hash_table
1517 {
1518 struct elf_link_hash_table root;
1519
1520 /* Short-cuts to get to dynamic linker sections. */
1521 asection *sgot;
1522 asection *sgotplt;
1523 asection *srelgot;
1524 asection *splt;
1525 asection *srelplt;
1526 asection *sdynbss;
1527 asection *srelbss;
1528
1529 /* Small local sym cache. */
1530 struct sym_cache sym_cache;
1531 };
1532
1533 /* Traverse an m32r ELF linker hash table. */
1534
1535 #define m32r_elf_link_hash_traverse(table, func, info) \
1536 (elf_link_hash_traverse \
1537 (&(table)->root, \
1538 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1539 (info)))
1540
1541 /* Get the m32r ELF linker hash table from a link_info structure. */
1542
1543 #define m32r_elf_hash_table(p) \
1544 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1545 == M32R_ELF_DATA ? ((struct elf_m32r_link_hash_table *) ((p)->hash)) : NULL)
1546
1547 /* Create an entry in an m32r ELF linker hash table. */
1548
1549 static struct bfd_hash_entry *
m32r_elf_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)1550 m32r_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1551 struct bfd_hash_table *table,
1552 const char *string)
1553 {
1554 struct elf_m32r_link_hash_entry *ret =
1555 (struct elf_m32r_link_hash_entry *) entry;
1556
1557 /* Allocate the structure if it has not already been allocated by a
1558 subclass. */
1559 if (ret == NULL)
1560 ret = bfd_hash_allocate (table,
1561 sizeof (struct elf_m32r_link_hash_entry));
1562 if (ret == NULL)
1563 return NULL;
1564
1565 /* Call the allocation method of the superclass. */
1566 ret = ((struct elf_m32r_link_hash_entry *)
1567 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1568 table, string));
1569 if (ret != NULL)
1570 {
1571 struct elf_m32r_link_hash_entry *eh;
1572
1573 eh = (struct elf_m32r_link_hash_entry *) ret;
1574 eh->dyn_relocs = NULL;
1575 }
1576
1577 return (struct bfd_hash_entry *) ret;
1578 }
1579
1580 /* Create an m32r ELF linker hash table. */
1581
1582 static struct bfd_link_hash_table *
m32r_elf_link_hash_table_create(bfd * abfd)1583 m32r_elf_link_hash_table_create (bfd *abfd)
1584 {
1585 struct elf_m32r_link_hash_table *ret;
1586 bfd_size_type amt = sizeof (struct elf_m32r_link_hash_table);
1587
1588 ret = bfd_zmalloc (amt);
1589 if (ret == NULL)
1590 return NULL;
1591
1592 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
1593 m32r_elf_link_hash_newfunc,
1594 sizeof (struct elf_m32r_link_hash_entry),
1595 M32R_ELF_DATA))
1596 {
1597 free (ret);
1598 return NULL;
1599 }
1600
1601 return &ret->root.root;
1602 }
1603
1604 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
1605 shortcuts to them in our hash table. */
1606
1607 static bfd_boolean
create_got_section(bfd * dynobj,struct bfd_link_info * info)1608 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1609 {
1610 struct elf_m32r_link_hash_table *htab;
1611
1612 if (! _bfd_elf_create_got_section (dynobj, info))
1613 return FALSE;
1614
1615 htab = m32r_elf_hash_table (info);
1616 if (htab == NULL)
1617 return FALSE;
1618
1619 htab->sgot = bfd_get_linker_section (dynobj, ".got");
1620 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1621 htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1622 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
1623 abort ();
1624
1625 return TRUE;
1626 }
1627
1628 /* Create dynamic sections when linking against a dynamic object. */
1629
1630 static bfd_boolean
m32r_elf_create_dynamic_sections(bfd * abfd,struct bfd_link_info * info)1631 m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
1632 {
1633 struct elf_m32r_link_hash_table *htab;
1634 flagword flags, pltflags;
1635 asection *s;
1636 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1637 int ptralign = 2; /* 32bit */
1638
1639 htab = m32r_elf_hash_table (info);
1640 if (htab == NULL)
1641 return FALSE;
1642
1643 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
1644 .rel[a].bss sections. */
1645 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1646 | SEC_LINKER_CREATED);
1647
1648 pltflags = flags;
1649 pltflags |= SEC_CODE;
1650 if (bed->plt_not_loaded)
1651 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
1652 if (bed->plt_readonly)
1653 pltflags |= SEC_READONLY;
1654
1655 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
1656 htab->splt = s;
1657 if (s == NULL
1658 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
1659 return FALSE;
1660
1661 if (bed->want_plt_sym)
1662 {
1663 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1664 .plt section. */
1665 struct bfd_link_hash_entry *bh = NULL;
1666 struct elf_link_hash_entry *h;
1667
1668 if (! (_bfd_generic_link_add_one_symbol
1669 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
1670 (bfd_vma) 0, NULL, FALSE,
1671 get_elf_backend_data (abfd)->collect, &bh)))
1672 return FALSE;
1673 h = (struct elf_link_hash_entry *) bh;
1674 h->def_regular = 1;
1675 h->type = STT_OBJECT;
1676 htab->root.hplt = h;
1677
1678 if (info->shared
1679 && ! bfd_elf_link_record_dynamic_symbol (info, h))
1680 return FALSE;
1681 }
1682
1683 s = bfd_make_section_anyway_with_flags (abfd,
1684 bed->default_use_rela_p
1685 ? ".rela.plt" : ".rel.plt",
1686 flags | SEC_READONLY);
1687 htab->srelplt = s;
1688 if (s == NULL
1689 || ! bfd_set_section_alignment (abfd, s, ptralign))
1690 return FALSE;
1691
1692 if (htab->sgot == NULL
1693 && ! create_got_section (abfd, info))
1694 return FALSE;
1695
1696 if (bed->want_dynbss)
1697 {
1698 /* The .dynbss section is a place to put symbols which are defined
1699 by dynamic objects, are referenced by regular objects, and are
1700 not functions. We must allocate space for them in the process
1701 image and use a R_*_COPY reloc to tell the dynamic linker to
1702 initialize them at run time. The linker script puts the .dynbss
1703 section into the .bss section of the final image. */
1704 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
1705 SEC_ALLOC | SEC_LINKER_CREATED);
1706 htab->sdynbss = s;
1707 if (s == NULL)
1708 return FALSE;
1709 /* The .rel[a].bss section holds copy relocs. This section is not
1710 normally needed. We need to create it here, though, so that the
1711 linker will map it to an output section. We can't just create it
1712 only if we need it, because we will not know whether we need it
1713 until we have seen all the input files, and the first time the
1714 main linker code calls BFD after examining all the input files
1715 (size_dynamic_sections) the input sections have already been
1716 mapped to the output sections. If the section turns out not to
1717 be needed, we can discard it later. We will never need this
1718 section when generating a shared object, since they do not use
1719 copy relocs. */
1720 if (! info->shared)
1721 {
1722 s = bfd_make_section_anyway_with_flags (abfd,
1723 (bed->default_use_rela_p
1724 ? ".rela.bss" : ".rel.bss"),
1725 flags | SEC_READONLY);
1726 htab->srelbss = s;
1727 if (s == NULL
1728 || ! bfd_set_section_alignment (abfd, s, ptralign))
1729 return FALSE;
1730 }
1731 }
1732
1733 return TRUE;
1734 }
1735
1736 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1737
1738 static void
m32r_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)1739 m32r_elf_copy_indirect_symbol (struct bfd_link_info *info,
1740 struct elf_link_hash_entry *dir,
1741 struct elf_link_hash_entry *ind)
1742 {
1743 struct elf_m32r_link_hash_entry * edir;
1744 struct elf_m32r_link_hash_entry * eind;
1745
1746 edir = (struct elf_m32r_link_hash_entry *) dir;
1747 eind = (struct elf_m32r_link_hash_entry *) ind;
1748
1749 if (eind->dyn_relocs != NULL)
1750 {
1751 if (edir->dyn_relocs != NULL)
1752 {
1753 struct elf_m32r_dyn_relocs **pp;
1754 struct elf_m32r_dyn_relocs *p;
1755
1756 /* Add reloc counts against the indirect sym to the direct sym
1757 list. Merge any entries against the same section. */
1758 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
1759 {
1760 struct elf_m32r_dyn_relocs *q;
1761
1762 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1763 if (q->sec == p->sec)
1764 {
1765 q->pc_count += p->pc_count;
1766 q->count += p->count;
1767 *pp = p->next;
1768 break;
1769 }
1770 if (q == NULL)
1771 pp = &p->next;
1772 }
1773 *pp = edir->dyn_relocs;
1774 }
1775
1776 edir->dyn_relocs = eind->dyn_relocs;
1777 eind->dyn_relocs = NULL;
1778 }
1779
1780 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1781 }
1782
1783
1784 /* Adjust a symbol defined by a dynamic object and referenced by a
1785 regular object. The current definition is in some section of the
1786 dynamic object, but we're not including those sections. We have to
1787 change the definition to something the rest of the link can
1788 understand. */
1789
1790 static bfd_boolean
m32r_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)1791 m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
1792 struct elf_link_hash_entry *h)
1793 {
1794 struct elf_m32r_link_hash_table *htab;
1795 struct elf_m32r_link_hash_entry *eh;
1796 struct elf_m32r_dyn_relocs *p;
1797 bfd *dynobj;
1798 asection *s;
1799
1800 #ifdef DEBUG_PIC
1801 printf ("m32r_elf_adjust_dynamic_symbol()\n");
1802 #endif
1803
1804 dynobj = elf_hash_table (info)->dynobj;
1805
1806 /* Make sure we know what is going on here. */
1807 BFD_ASSERT (dynobj != NULL
1808 && (h->needs_plt
1809 || h->u.weakdef != NULL
1810 || (h->def_dynamic
1811 && h->ref_regular
1812 && !h->def_regular)));
1813
1814 /* If this is a function, put it in the procedure linkage table. We
1815 will fill in the contents of the procedure linkage table later,
1816 when we know the address of the .got section. */
1817 if (h->type == STT_FUNC
1818 || h->needs_plt)
1819 {
1820 if (! info->shared
1821 && !h->def_dynamic
1822 && !h->ref_dynamic
1823 && h->root.type != bfd_link_hash_undefweak
1824 && h->root.type != bfd_link_hash_undefined)
1825 {
1826 /* This case can occur if we saw a PLT reloc in an input
1827 file, but the symbol was never referred to by a dynamic
1828 object. In such a case, we don't actually need to build
1829 a procedure linkage table, and we can just do a PCREL
1830 reloc instead. */
1831 h->plt.offset = (bfd_vma) -1;
1832 h->needs_plt = 0;
1833 }
1834
1835 return TRUE;
1836 }
1837 else
1838 h->plt.offset = (bfd_vma) -1;
1839
1840 /* If this is a weak symbol, and there is a real definition, the
1841 processor independent code will have arranged for us to see the
1842 real definition first, and we can just use the same value. */
1843 if (h->u.weakdef != NULL)
1844 {
1845 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1846 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1847 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1848 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1849 return TRUE;
1850 }
1851
1852 /* This is a reference to a symbol defined by a dynamic object which
1853 is not a function. */
1854
1855 /* If we are creating a shared library, we must presume that the
1856 only references to the symbol are via the global offset table.
1857 For such cases we need not do anything here; the relocations will
1858 be handled correctly by relocate_section. */
1859 if (info->shared)
1860 return TRUE;
1861
1862 /* If there are no references to this symbol that do not use the
1863 GOT, we don't need to generate a copy reloc. */
1864 if (!h->non_got_ref)
1865 return TRUE;
1866
1867 /* If -z nocopyreloc was given, we won't generate them either. */
1868 if (info->nocopyreloc)
1869 {
1870 h->non_got_ref = 0;
1871 return TRUE;
1872 }
1873
1874 eh = (struct elf_m32r_link_hash_entry *) h;
1875 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1876 {
1877 s = p->sec->output_section;
1878 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
1879 break;
1880 }
1881
1882 /* If we didn't find any dynamic relocs in sections which needs the
1883 copy reloc, then we'll be keeping the dynamic relocs and avoiding
1884 the copy reloc. */
1885 if (p == NULL)
1886 {
1887 h->non_got_ref = 0;
1888 return TRUE;
1889 }
1890
1891 /* We must allocate the symbol in our .dynbss section, which will
1892 become part of the .bss section of the executable. There will be
1893 an entry for this symbol in the .dynsym section. The dynamic
1894 object will contain position independent code, so all references
1895 from the dynamic object to this symbol will go through the global
1896 offset table. The dynamic linker will use the .dynsym entry to
1897 determine the address it must put in the global offset table, so
1898 both the dynamic object and the regular object will refer to the
1899 same memory location for the variable. */
1900
1901 htab = m32r_elf_hash_table (info);
1902 if (htab == NULL)
1903 return FALSE;
1904
1905 s = htab->sdynbss;
1906 BFD_ASSERT (s != NULL);
1907
1908 /* We must generate a R_M32R_COPY reloc to tell the dynamic linker
1909 to copy the initial value out of the dynamic object and into the
1910 runtime process image. We need to remember the offset into the
1911 .rela.bss section we are going to use. */
1912 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1913 {
1914 asection *srel;
1915
1916 srel = htab->srelbss;
1917 BFD_ASSERT (srel != NULL);
1918 srel->size += sizeof (Elf32_External_Rela);
1919 h->needs_copy = 1;
1920 }
1921
1922 return _bfd_elf_adjust_dynamic_copy (h, s);
1923 }
1924
1925 /* Allocate space in .plt, .got and associated reloc sections for
1926 dynamic relocs. */
1927
1928 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)1929 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1930 {
1931 struct bfd_link_info *info;
1932 struct elf_m32r_link_hash_table *htab;
1933 struct elf_m32r_link_hash_entry *eh;
1934 struct elf_m32r_dyn_relocs *p;
1935
1936 if (h->root.type == bfd_link_hash_indirect)
1937 return TRUE;
1938
1939 info = (struct bfd_link_info *) inf;
1940 htab = m32r_elf_hash_table (info);
1941 if (htab == NULL)
1942 return FALSE;
1943
1944 eh = (struct elf_m32r_link_hash_entry *) h;
1945
1946 if (htab->root.dynamic_sections_created
1947 && h->plt.refcount > 0)
1948 {
1949 /* Make sure this symbol is output as a dynamic symbol.
1950 Undefined weak syms won't yet be marked as dynamic. */
1951 if (h->dynindx == -1
1952 && !h->forced_local)
1953 {
1954 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1955 return FALSE;
1956 }
1957
1958 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
1959 {
1960 asection *s = htab->splt;
1961
1962 /* If this is the first .plt entry, make room for the special
1963 first entry. */
1964 if (s->size == 0)
1965 s->size += PLT_ENTRY_SIZE;
1966
1967 h->plt.offset = s->size;
1968
1969 /* If this symbol is not defined in a regular file, and we are
1970 not generating a shared library, then set the symbol to this
1971 location in the .plt. This is required to make function
1972 pointers compare as equal between the normal executable and
1973 the shared library. */
1974 if (! info->shared
1975 && !h->def_regular)
1976 {
1977 h->root.u.def.section = s;
1978 h->root.u.def.value = h->plt.offset;
1979 }
1980
1981 /* Make room for this entry. */
1982 s->size += PLT_ENTRY_SIZE;
1983
1984 /* We also need to make an entry in the .got.plt section, which
1985 will be placed in the .got section by the linker script. */
1986 htab->sgotplt->size += 4;
1987
1988 /* We also need to make an entry in the .rel.plt section. */
1989 htab->srelplt->size += sizeof (Elf32_External_Rela);
1990 }
1991 else
1992 {
1993 h->plt.offset = (bfd_vma) -1;
1994 h->needs_plt = 0;
1995 }
1996 }
1997 else
1998 {
1999 h->plt.offset = (bfd_vma) -1;
2000 h->needs_plt = 0;
2001 }
2002
2003 if (h->got.refcount > 0)
2004 {
2005 asection *s;
2006 bfd_boolean dyn;
2007
2008 /* Make sure this symbol is output as a dynamic symbol.
2009 Undefined weak syms won't yet be marked as dynamic. */
2010 if (h->dynindx == -1
2011 && !h->forced_local)
2012 {
2013 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2014 return FALSE;
2015 }
2016
2017 s = htab->sgot;
2018
2019 h->got.offset = s->size;
2020 s->size += 4;
2021 dyn = htab->root.dynamic_sections_created;
2022 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
2023 htab->srelgot->size += sizeof (Elf32_External_Rela);
2024 }
2025 else
2026 h->got.offset = (bfd_vma) -1;
2027
2028 if (eh->dyn_relocs == NULL)
2029 return TRUE;
2030
2031 /* In the shared -Bsymbolic case, discard space allocated for
2032 dynamic pc-relative relocs against symbols which turn out to be
2033 defined in regular objects. For the normal shared case, discard
2034 space for pc-relative relocs that have become local due to symbol
2035 visibility changes. */
2036
2037 if (info->shared)
2038 {
2039 if (h->def_regular
2040 && (h->forced_local
2041 || info->symbolic))
2042 {
2043 struct elf_m32r_dyn_relocs **pp;
2044
2045 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2046 {
2047 p->count -= p->pc_count;
2048 p->pc_count = 0;
2049 if (p->count == 0)
2050 *pp = p->next;
2051 else
2052 pp = &p->next;
2053 }
2054 }
2055
2056 /* Also discard relocs on undefined weak syms with non-default
2057 visibility. */
2058 if (eh->dyn_relocs != NULL
2059 && h->root.type == bfd_link_hash_undefweak)
2060 {
2061 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2062 eh->dyn_relocs = NULL;
2063
2064 /* Make sure undefined weak symbols are output as a dynamic
2065 symbol in PIEs. */
2066 else if (h->dynindx == -1
2067 && !h->forced_local)
2068 {
2069 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2070 return FALSE;
2071 }
2072 }
2073 }
2074 else
2075 {
2076 /* For the non-shared case, discard space for relocs against
2077 symbols which turn out to need copy relocs or are not
2078 dynamic. */
2079
2080 if (!h->non_got_ref
2081 && ((h->def_dynamic
2082 && !h->def_regular)
2083 || (htab->root.dynamic_sections_created
2084 && (h->root.type == bfd_link_hash_undefweak
2085 || h->root.type == bfd_link_hash_undefined))))
2086 {
2087 /* Make sure this symbol is output as a dynamic symbol.
2088 Undefined weak syms won't yet be marked as dynamic. */
2089 if (h->dynindx == -1
2090 && !h->forced_local)
2091 {
2092 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2093 return FALSE;
2094 }
2095
2096 /* If that succeeded, we know we'll be keeping all the
2097 relocs. */
2098 if (h->dynindx != -1)
2099 goto keep;
2100 }
2101
2102 eh->dyn_relocs = NULL;
2103
2104 keep: ;
2105 }
2106
2107 /* Finally, allocate space. */
2108 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2109 {
2110 asection *sreloc = elf_section_data (p->sec)->sreloc;
2111 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2112 }
2113
2114 return TRUE;
2115 }
2116
2117 /* Find any dynamic relocs that apply to read-only sections. */
2118
2119 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h,void * inf)2120 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2121 {
2122 struct elf_m32r_link_hash_entry *eh;
2123 struct elf_m32r_dyn_relocs *p;
2124
2125 eh = (struct elf_m32r_link_hash_entry *) h;
2126 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2127 {
2128 asection *s = p->sec->output_section;
2129
2130 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2131 {
2132 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2133
2134 info->flags |= DF_TEXTREL;
2135
2136 /* Not an error, just cut short the traversal. */
2137 return FALSE;
2138 }
2139 }
2140 return TRUE;
2141 }
2142
2143 /* Set the sizes of the dynamic sections. */
2144
2145 static bfd_boolean
m32r_elf_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)2146 m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2147 struct bfd_link_info *info)
2148 {
2149 struct elf_m32r_link_hash_table *htab;
2150 bfd *dynobj;
2151 asection *s;
2152 bfd_boolean relocs;
2153 bfd *ibfd;
2154
2155 #ifdef DEBUG_PIC
2156 printf ("m32r_elf_size_dynamic_sections()\n");
2157 #endif
2158
2159 htab = m32r_elf_hash_table (info);
2160 if (htab == NULL)
2161 return FALSE;
2162
2163 dynobj = htab->root.dynobj;
2164 BFD_ASSERT (dynobj != NULL);
2165
2166 if (htab->root.dynamic_sections_created)
2167 {
2168 /* Set the contents of the .interp section to the interpreter. */
2169 if (info->executable)
2170 {
2171 s = bfd_get_linker_section (dynobj, ".interp");
2172 BFD_ASSERT (s != NULL);
2173 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2174 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2175 }
2176 }
2177
2178 /* Set up .got offsets for local syms, and space for local dynamic
2179 relocs. */
2180 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2181 {
2182 bfd_signed_vma *local_got;
2183 bfd_signed_vma *end_local_got;
2184 bfd_size_type locsymcount;
2185 Elf_Internal_Shdr *symtab_hdr;
2186 asection *srel;
2187
2188 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2189 continue;
2190
2191 for (s = ibfd->sections; s != NULL; s = s->next)
2192 {
2193 struct elf_m32r_dyn_relocs *p;
2194
2195 for (p = ((struct elf_m32r_dyn_relocs *)
2196 elf_section_data (s)->local_dynrel);
2197 p != NULL;
2198 p = p->next)
2199 {
2200 if (! bfd_is_abs_section (p->sec)
2201 && bfd_is_abs_section (p->sec->output_section))
2202 {
2203 /* Input section has been discarded, either because
2204 it is a copy of a linkonce section or due to
2205 linker script /DISCARD/, so we'll be discarding
2206 the relocs too. */
2207 }
2208 else if (p->count != 0)
2209 {
2210 srel = elf_section_data (p->sec)->sreloc;
2211 srel->size += p->count * sizeof (Elf32_External_Rela);
2212 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2213 info->flags |= DF_TEXTREL;
2214 }
2215 }
2216 }
2217
2218 local_got = elf_local_got_refcounts (ibfd);
2219 if (!local_got)
2220 continue;
2221
2222 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2223 locsymcount = symtab_hdr->sh_info;
2224 end_local_got = local_got + locsymcount;
2225 s = htab->sgot;
2226 srel = htab->srelgot;
2227 for (; local_got < end_local_got; ++local_got)
2228 {
2229 if (*local_got > 0)
2230 {
2231 *local_got = s->size;
2232 s->size += 4;
2233 if (info->shared)
2234 srel->size += sizeof (Elf32_External_Rela);
2235 }
2236 else
2237 *local_got = (bfd_vma) -1;
2238 }
2239 }
2240
2241 /* Allocate global sym .plt and .got entries, and space for global
2242 sym dynamic relocs. */
2243 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2244
2245 /* We now have determined the sizes of the various dynamic sections.
2246 Allocate memory for them. */
2247 relocs = FALSE;
2248 for (s = dynobj->sections; s != NULL; s = s->next)
2249 {
2250 if ((s->flags & SEC_LINKER_CREATED) == 0)
2251 continue;
2252
2253 if (s == htab->splt
2254 || s == htab->sgot
2255 || s == htab->sgotplt
2256 || s == htab->sdynbss)
2257 {
2258 /* Strip this section if we don't need it; see the
2259 comment below. */
2260 }
2261 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2262 {
2263 if (s->size != 0 && s != htab->srelplt)
2264 relocs = TRUE;
2265
2266 /* We use the reloc_count field as a counter if we need
2267 to copy relocs into the output file. */
2268 s->reloc_count = 0;
2269 }
2270 else
2271 /* It's not one of our sections, so don't allocate space. */
2272 continue;
2273
2274 if (s->size == 0)
2275 {
2276 /* If we don't need this section, strip it from the
2277 output file. This is mostly to handle .rela.bss and
2278 .rela.plt. We must create both sections in
2279 create_dynamic_sections, because they must be created
2280 before the linker maps input sections to output
2281 sections. The linker does that before
2282 adjust_dynamic_symbol is called, and it is that
2283 function which decides whether anything needs to go
2284 into these sections. */
2285 s->flags |= SEC_EXCLUDE;
2286 continue;
2287 }
2288
2289 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2290 continue;
2291
2292 /* Allocate memory for the section contents. We use bfd_zalloc
2293 here in case unused entries are not reclaimed before the
2294 section's contents are written out. This should not happen,
2295 but this way if it does, we get a R_M32R_NONE reloc instead
2296 of garbage. */
2297 s->contents = bfd_zalloc (dynobj, s->size);
2298 if (s->contents == NULL)
2299 return FALSE;
2300 }
2301
2302 if (htab->root.dynamic_sections_created)
2303 {
2304 /* Add some entries to the .dynamic section. We fill in the
2305 values later, in m32r_elf_finish_dynamic_sections, but we
2306 must add the entries now so that we get the correct size for
2307 the .dynamic section. The DT_DEBUG entry is filled in by the
2308 dynamic linker and used by the debugger. */
2309 #define add_dynamic_entry(TAG, VAL) \
2310 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2311
2312 if (info->executable)
2313 {
2314 if (! add_dynamic_entry (DT_DEBUG, 0))
2315 return FALSE;
2316 }
2317
2318 if (htab->splt->size != 0)
2319 {
2320 if (! add_dynamic_entry (DT_PLTGOT, 0)
2321 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2322 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2323 || ! add_dynamic_entry (DT_JMPREL, 0))
2324 return FALSE;
2325 }
2326
2327 if (relocs)
2328 {
2329 if (! add_dynamic_entry (DT_RELA, 0)
2330 || ! add_dynamic_entry (DT_RELASZ, 0)
2331 || ! add_dynamic_entry (DT_RELAENT,
2332 sizeof (Elf32_External_Rela)))
2333 return FALSE;
2334
2335 /* If any dynamic relocs apply to a read-only section,
2336 then we need a DT_TEXTREL entry. */
2337 if ((info->flags & DF_TEXTREL) == 0)
2338 elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2339 info);
2340
2341 if ((info->flags & DF_TEXTREL) != 0)
2342 {
2343 if (! add_dynamic_entry (DT_TEXTREL, 0))
2344 return FALSE;
2345 }
2346 }
2347 }
2348 #undef add_dynamic_entry
2349
2350 return TRUE;
2351 }
2352
2353 /* Relocate an M32R/D ELF section.
2354 There is some attempt to make this function usable for many architectures,
2355 both for RELA and REL type relocs, if only to serve as a learning tool.
2356
2357 The RELOCATE_SECTION function is called by the new ELF backend linker
2358 to handle the relocations for a section.
2359
2360 The relocs are always passed as Rela structures; if the section
2361 actually uses Rel structures, the r_addend field will always be
2362 zero.
2363
2364 This function is responsible for adjust the section contents as
2365 necessary, and (if using Rela relocs and generating a
2366 relocatable output file) adjusting the reloc addend as
2367 necessary.
2368
2369 This function does not have to worry about setting the reloc
2370 address or the reloc symbol index.
2371
2372 LOCAL_SYMS is a pointer to the swapped in local symbols.
2373
2374 LOCAL_SECTIONS is an array giving the section in the input file
2375 corresponding to the st_shndx field of each local symbol.
2376
2377 The global hash table entry for the global symbols can be found
2378 via elf_sym_hashes (input_bfd).
2379
2380 When generating relocatable output, this function must handle
2381 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2382 going to be the section symbol corresponding to the output
2383 section, which means that the addend must be adjusted
2384 accordingly. */
2385
2386 static bfd_boolean
m32r_elf_relocate_section(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)2387 m32r_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
2388 struct bfd_link_info *info,
2389 bfd *input_bfd,
2390 asection *input_section,
2391 bfd_byte *contents,
2392 Elf_Internal_Rela *relocs,
2393 Elf_Internal_Sym *local_syms,
2394 asection **local_sections)
2395 {
2396 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2397 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
2398 Elf_Internal_Rela *rel, *relend;
2399 /* Assume success. */
2400 bfd_boolean ret = TRUE;
2401 struct elf_m32r_link_hash_table *htab = m32r_elf_hash_table (info);
2402 bfd *dynobj;
2403 bfd_vma *local_got_offsets;
2404 asection *sgot, *splt, *sreloc;
2405 bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section);
2406
2407 if (htab == NULL)
2408 return FALSE;
2409
2410 dynobj = htab->root.dynobj;
2411 local_got_offsets = elf_local_got_offsets (input_bfd);
2412
2413 sgot = htab->sgot;
2414 splt = htab->splt;
2415 sreloc = NULL;
2416
2417 rel = relocs;
2418 relend = relocs + input_section->reloc_count;
2419 for (; rel < relend; rel++)
2420 {
2421 int r_type;
2422 reloc_howto_type *howto;
2423 unsigned long r_symndx;
2424 struct elf_link_hash_entry *h;
2425 /* We can't modify r_addend here as elf_link_input_bfd has an assert to
2426 ensure it's zero (we use REL relocs, not RELA). Therefore this
2427 should be assigning zero to `addend', but for clarity we use
2428 `r_addend'. */
2429 bfd_vma addend = rel->r_addend;
2430 bfd_vma offset = rel->r_offset;
2431 bfd_vma relocation;
2432 Elf_Internal_Sym *sym;
2433 asection *sec;
2434 const char *sym_name;
2435 bfd_reloc_status_type r;
2436 const char *errmsg = NULL;
2437 bfd_boolean use_rel = FALSE;
2438
2439 h = NULL;
2440 r_type = ELF32_R_TYPE (rel->r_info);
2441 if (r_type < 0 || r_type >= (int) R_M32R_max)
2442 {
2443 (*_bfd_error_handler) (_("%B: unknown relocation type %d"),
2444 input_bfd,
2445 (int) r_type);
2446 bfd_set_error (bfd_error_bad_value);
2447 ret = FALSE;
2448 continue;
2449 }
2450
2451 if ( r_type == R_M32R_GNU_VTENTRY
2452 || r_type == R_M32R_GNU_VTINHERIT
2453 || r_type == R_M32R_NONE
2454 || r_type == R_M32R_RELA_GNU_VTENTRY
2455 || r_type == R_M32R_RELA_GNU_VTINHERIT)
2456 continue;
2457
2458 if (r_type <= R_M32R_GNU_VTENTRY)
2459 use_rel = TRUE;
2460
2461 howto = m32r_elf_howto_table + r_type;
2462 r_symndx = ELF32_R_SYM (rel->r_info);
2463
2464 sym = NULL;
2465 sec = NULL;
2466 h = NULL;
2467
2468 if (r_symndx < symtab_hdr->sh_info)
2469 {
2470 /* Local symbol. */
2471 sym = local_syms + r_symndx;
2472 sec = local_sections[r_symndx];
2473 sym_name = "<local symbol>";
2474
2475 if (!use_rel)
2476 {
2477 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2478 addend = rel->r_addend;
2479 }
2480 else
2481 {
2482 relocation = (sec->output_section->vma
2483 + sec->output_offset
2484 + sym->st_value);
2485 }
2486 }
2487 else
2488 {
2489 /* External symbol. */
2490 relocation = 0;
2491
2492 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2493
2494 if (info->wrap_hash != NULL
2495 && (input_section->flags & SEC_DEBUGGING) != 0)
2496 h = ((struct elf_link_hash_entry *)
2497 unwrap_hash_lookup (info, input_bfd, &h->root));
2498
2499 while (h->root.type == bfd_link_hash_indirect
2500 || h->root.type == bfd_link_hash_warning)
2501 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2502 sym_name = h->root.root.string;
2503
2504 if (h->root.type == bfd_link_hash_defined
2505 || h->root.type == bfd_link_hash_defweak)
2506 {
2507 bfd_boolean dyn;
2508 sec = h->root.u.def.section;
2509
2510 dyn = htab->root.dynamic_sections_created;
2511 sec = h->root.u.def.section;
2512 if (r_type == R_M32R_GOTPC24
2513 || (r_type == R_M32R_GOTPC_HI_ULO
2514 || r_type == R_M32R_GOTPC_HI_SLO
2515 || r_type == R_M32R_GOTPC_LO)
2516 || (r_type == R_M32R_26_PLTREL
2517 && h->plt.offset != (bfd_vma) -1)
2518 || ((r_type == R_M32R_GOT24
2519 || r_type == R_M32R_GOT16_HI_ULO
2520 || r_type == R_M32R_GOT16_HI_SLO
2521 || r_type == R_M32R_GOT16_LO)
2522 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2523 info->shared, h)
2524 && (! info->shared
2525 || (! info->symbolic && h->dynindx != -1)
2526 || !h->def_regular))
2527 || (info->shared
2528 && ((! info->symbolic && h->dynindx != -1)
2529 || !h->def_regular)
2530 && (((r_type == R_M32R_16_RELA
2531 || r_type == R_M32R_32_RELA
2532 || r_type == R_M32R_24_RELA
2533 || r_type == R_M32R_HI16_ULO_RELA
2534 || r_type == R_M32R_HI16_SLO_RELA
2535 || r_type == R_M32R_LO16_RELA)
2536 && !h->forced_local)
2537 || r_type == R_M32R_REL32
2538 || r_type == R_M32R_10_PCREL_RELA
2539 || r_type == R_M32R_18_PCREL_RELA
2540 || r_type == R_M32R_26_PCREL_RELA)
2541 && ((input_section->flags & SEC_ALLOC) != 0
2542 /* DWARF will emit R_M32R_16(24,32) relocations
2543 in its sections against symbols defined
2544 externally in shared libraries. We can't do
2545 anything with them here. */
2546 || ((input_section->flags & SEC_DEBUGGING) != 0
2547 && h->def_dynamic))))
2548 {
2549 /* In these cases, we don't need the relocation
2550 value. We check specially because in some
2551 obscure cases sec->output_section will be NULL. */
2552 }
2553 else if (sec->output_section != NULL)
2554 relocation = (h->root.u.def.value
2555 + sec->output_section->vma
2556 + sec->output_offset);
2557 else if (!info->relocatable
2558 && (_bfd_elf_section_offset (output_bfd, info,
2559 input_section,
2560 rel->r_offset)
2561 != (bfd_vma) -1))
2562 {
2563 (*_bfd_error_handler)
2564 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2565 input_bfd,
2566 input_section,
2567 (long) rel->r_offset,
2568 howto->name,
2569 h->root.root.string);
2570 }
2571 }
2572 else if (h->root.type == bfd_link_hash_undefweak)
2573 ;
2574 else if (info->unresolved_syms_in_objects == RM_IGNORE
2575 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2576 ;
2577 else if (!info->relocatable)
2578 {
2579 if (! ((*info->callbacks->undefined_symbol)
2580 (info, h->root.root.string, input_bfd,
2581 input_section, offset,
2582 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
2583 || ELF_ST_VISIBILITY (h->other)))))
2584 return FALSE;
2585 }
2586 }
2587
2588 if (sec != NULL && discarded_section (sec))
2589 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2590 rel, 1, relend, howto, 0, contents);
2591
2592 if (info->relocatable && !use_rel)
2593 {
2594 /* This is a relocatable link. We don't have to change
2595 anything, unless the reloc is against a section symbol,
2596 in which case we have to adjust according to where the
2597 section symbol winds up in the output section. */
2598 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2599 rel->r_addend += sec->output_offset;
2600 continue;
2601 }
2602
2603 if (info->relocatable && use_rel)
2604 {
2605 /* This is a relocatable link. We don't have to change
2606 anything, unless the reloc is against a section symbol,
2607 in which case we have to adjust according to where the
2608 section symbol winds up in the output section. */
2609 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2610 continue;
2611
2612 addend += sec->output_offset;
2613
2614 /* If partial_inplace, we need to store any additional addend
2615 back in the section. */
2616 if (! howto->partial_inplace)
2617 continue;
2618 /* ??? Here is a nice place to call a special_function
2619 like handler. */
2620 if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO)
2621 r = _bfd_relocate_contents (howto, input_bfd,
2622 addend, contents + offset);
2623 else
2624 {
2625 Elf_Internal_Rela *lorel;
2626
2627 /* We allow an arbitrary number of HI16 relocs before the
2628 LO16 reloc. This permits gcc to emit the HI and LO relocs
2629 itself. */
2630 for (lorel = rel + 1;
2631 (lorel < relend
2632 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
2633 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
2634 lorel++)
2635 continue;
2636 if (lorel < relend
2637 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
2638 {
2639 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
2640 contents, addend);
2641 r = bfd_reloc_ok;
2642 }
2643 else
2644 r = _bfd_relocate_contents (howto, input_bfd,
2645 addend, contents + offset);
2646 }
2647 }
2648 else
2649 {
2650 /* Sanity check the address. */
2651 if (offset > high_address)
2652 {
2653 r = bfd_reloc_outofrange;
2654 goto check_reloc;
2655 }
2656
2657 switch ((int) r_type)
2658 {
2659 case R_M32R_GOTOFF:
2660 /* Relocation is relative to the start of the global offset
2661 table (for ld24 rx, #uimm24). eg access at label+addend
2662
2663 ld24 rx. #label@GOTOFF + addend
2664 sub rx, r12. */
2665
2666 BFD_ASSERT (sgot != NULL);
2667
2668 relocation = -(relocation - sgot->output_section->vma);
2669 rel->r_addend = -rel->r_addend;
2670 break;
2671
2672 case R_M32R_GOTOFF_HI_ULO:
2673 case R_M32R_GOTOFF_HI_SLO:
2674 case R_M32R_GOTOFF_LO:
2675 BFD_ASSERT (sgot != NULL);
2676
2677 relocation -= sgot->output_section->vma;
2678
2679 if ((r_type == R_M32R_GOTOFF_HI_SLO)
2680 && ((relocation + rel->r_addend) & 0x8000))
2681 rel->r_addend += 0x10000;
2682 break;
2683
2684 case R_M32R_GOTPC24:
2685 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation
2686 ld24 rx,#_GLOBAL_OFFSET_TABLE_
2687 */
2688 relocation = sgot->output_section->vma;
2689 break;
2690
2691 case R_M32R_GOTPC_HI_ULO:
2692 case R_M32R_GOTPC_HI_SLO:
2693 case R_M32R_GOTPC_LO:
2694 {
2695 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation
2696 bl .+4
2697 seth rx,#high(_GLOBAL_OFFSET_TABLE_)
2698 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4)
2699 or
2700 bl .+4
2701 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_)
2702 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4)
2703 */
2704 relocation = sgot->output_section->vma;
2705 relocation -= (input_section->output_section->vma
2706 + input_section->output_offset
2707 + rel->r_offset);
2708 if ((r_type == R_M32R_GOTPC_HI_SLO)
2709 && ((relocation + rel->r_addend) & 0x8000))
2710 rel->r_addend += 0x10000;
2711
2712 break;
2713 }
2714 case R_M32R_GOT16_HI_ULO:
2715 case R_M32R_GOT16_HI_SLO:
2716 case R_M32R_GOT16_LO:
2717 /* Fall through. */
2718 case R_M32R_GOT24:
2719 /* Relocation is to the entry for this symbol in the global
2720 offset table. */
2721 BFD_ASSERT (sgot != NULL);
2722
2723 if (h != NULL)
2724 {
2725 bfd_boolean dyn;
2726 bfd_vma off;
2727
2728 off = h->got.offset;
2729 BFD_ASSERT (off != (bfd_vma) -1);
2730
2731 dyn = htab->root.dynamic_sections_created;
2732 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2733 || (info->shared
2734 && (info->symbolic
2735 || h->dynindx == -1
2736 || h->forced_local)
2737 && h->def_regular))
2738 {
2739 /* This is actually a static link, or it is a
2740 -Bsymbolic link and the symbol is defined
2741 locally, or the symbol was forced to be local
2742 because of a version file. We must initialize
2743 this entry in the global offset table. Since the
2744 offset must always be a multiple of 4, we use the
2745 least significant bit to record whether we have
2746 initialized it already.
2747
2748 When doing a dynamic link, we create a .rela.got
2749 relocation entry to initialize the value. This
2750 is done in the finish_dynamic_symbol routine. */
2751 if ((off & 1) != 0)
2752 off &= ~1;
2753 else
2754 {
2755 bfd_put_32 (output_bfd, relocation,
2756 sgot->contents + off);
2757 h->got.offset |= 1;
2758 }
2759 }
2760
2761 relocation = sgot->output_offset + off;
2762 }
2763 else
2764 {
2765 bfd_vma off;
2766 bfd_byte *loc;
2767
2768 BFD_ASSERT (local_got_offsets != NULL
2769 && local_got_offsets[r_symndx] != (bfd_vma) -1);
2770
2771 off = local_got_offsets[r_symndx];
2772
2773 /* The offset must always be a multiple of 4. We use
2774 the least significant bit to record whether we have
2775 already processed this entry. */
2776 if ((off & 1) != 0)
2777 off &= ~1;
2778 else
2779 {
2780 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
2781
2782 if (info->shared)
2783 {
2784 asection *srelgot;
2785 Elf_Internal_Rela outrel;
2786
2787 /* We need to generate a R_M32R_RELATIVE reloc
2788 for the dynamic linker. */
2789 srelgot = bfd_get_linker_section (dynobj,
2790 ".rela.got");
2791 BFD_ASSERT (srelgot != NULL);
2792
2793 outrel.r_offset = (sgot->output_section->vma
2794 + sgot->output_offset
2795 + off);
2796 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE);
2797 outrel.r_addend = relocation;
2798 loc = srelgot->contents;
2799 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
2800 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
2801 ++srelgot->reloc_count;
2802 }
2803
2804 local_got_offsets[r_symndx] |= 1;
2805 }
2806
2807 relocation = sgot->output_offset + off;
2808 }
2809 if ((r_type == R_M32R_GOT16_HI_SLO)
2810 && ((relocation + rel->r_addend) & 0x8000))
2811 rel->r_addend += 0x10000;
2812
2813 break;
2814
2815 case R_M32R_26_PLTREL:
2816 /* Relocation is to the entry for this symbol in the
2817 procedure linkage table. */
2818
2819 /* The native assembler will generate a 26_PLTREL reloc
2820 for a local symbol if you assemble a call from one
2821 section to another when using -K pic. */
2822 if (h == NULL)
2823 break;
2824
2825 if (h->forced_local)
2826 break;
2827
2828 if (h->plt.offset == (bfd_vma) -1)
2829 /* We didn't make a PLT entry for this symbol. This
2830 happens when statically linking PIC code, or when
2831 using -Bsymbolic. */
2832 break;
2833
2834 relocation = (splt->output_section->vma
2835 + splt->output_offset
2836 + h->plt.offset);
2837 break;
2838
2839 case R_M32R_HI16_SLO_RELA:
2840 if ((relocation + rel->r_addend) & 0x8000)
2841 rel->r_addend += 0x10000;
2842 /* Fall through. */
2843
2844 case R_M32R_16_RELA:
2845 case R_M32R_24_RELA:
2846 case R_M32R_32_RELA:
2847 case R_M32R_REL32:
2848 case R_M32R_10_PCREL_RELA:
2849 case R_M32R_18_PCREL_RELA:
2850 case R_M32R_26_PCREL_RELA:
2851 case R_M32R_HI16_ULO_RELA:
2852 case R_M32R_LO16_RELA:
2853 if (info->shared
2854 && r_symndx != STN_UNDEF
2855 && (input_section->flags & SEC_ALLOC) != 0
2856 && (( r_type != R_M32R_10_PCREL_RELA
2857 && r_type != R_M32R_18_PCREL_RELA
2858 && r_type != R_M32R_26_PCREL_RELA
2859 && r_type != R_M32R_REL32)
2860 || (h != NULL
2861 && h->dynindx != -1
2862 && (! info->symbolic
2863 || !h->def_regular))))
2864 {
2865 Elf_Internal_Rela outrel;
2866 bfd_boolean skip, relocate;
2867 bfd_byte *loc;
2868
2869 /* When generating a shared object, these relocations
2870 are copied into the output file to be resolved at run
2871 time. */
2872 if (sreloc == NULL)
2873 {
2874 sreloc = _bfd_elf_get_dynamic_reloc_section
2875 (input_bfd, input_section, /*rela?*/ TRUE);
2876 if (sreloc == NULL)
2877 return FALSE;
2878 }
2879
2880 skip = FALSE;
2881 relocate = FALSE;
2882
2883 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2884 info,
2885 input_section,
2886 rel->r_offset);
2887 if (outrel.r_offset == (bfd_vma) -1)
2888 skip = TRUE;
2889 else if (outrel.r_offset == (bfd_vma) -2)
2890 skip = relocate = TRUE;
2891 outrel.r_offset += (input_section->output_section->vma
2892 + input_section->output_offset);
2893
2894 if (skip)
2895 memset (&outrel, 0, sizeof outrel);
2896 else if ( r_type == R_M32R_10_PCREL_RELA
2897 || r_type == R_M32R_18_PCREL_RELA
2898 || r_type == R_M32R_26_PCREL_RELA
2899 || r_type == R_M32R_REL32)
2900 {
2901 BFD_ASSERT (h != NULL && h->dynindx != -1);
2902 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2903 outrel.r_addend = rel->r_addend;
2904 }
2905 else
2906 {
2907 /* h->dynindx may be -1 if this symbol was marked to
2908 become local. */
2909 if (h == NULL
2910 || ((info->symbolic || h->dynindx == -1)
2911 && h->def_regular))
2912 {
2913 relocate = TRUE;
2914 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE);
2915 outrel.r_addend = relocation + rel->r_addend;
2916 }
2917 else
2918 {
2919 BFD_ASSERT (h->dynindx != -1);
2920 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2921 outrel.r_addend = relocation + rel->r_addend;
2922 }
2923 }
2924
2925 loc = sreloc->contents;
2926 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela);
2927 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
2928 ++sreloc->reloc_count;
2929
2930 /* If this reloc is against an external symbol, we do
2931 not want to fiddle with the addend. Otherwise, we
2932 need to include the symbol value so that it becomes
2933 an addend for the dynamic reloc. */
2934 if (! relocate)
2935 continue;
2936 break;
2937 }
2938 else if (r_type != R_M32R_10_PCREL_RELA)
2939 break;
2940 /* Fall through. */
2941
2942 case (int) R_M32R_10_PCREL :
2943 r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section,
2944 contents, offset,
2945 sec, relocation, addend);
2946 goto check_reloc;
2947
2948 case (int) R_M32R_HI16_SLO :
2949 case (int) R_M32R_HI16_ULO :
2950 {
2951 Elf_Internal_Rela *lorel;
2952
2953 /* We allow an arbitrary number of HI16 relocs before the
2954 LO16 reloc. This permits gcc to emit the HI and LO relocs
2955 itself. */
2956 for (lorel = rel + 1;
2957 (lorel < relend
2958 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
2959 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
2960 lorel++)
2961 continue;
2962 if (lorel < relend
2963 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
2964 {
2965 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
2966 contents, relocation + addend);
2967 r = bfd_reloc_ok;
2968 }
2969 else
2970 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2971 contents, offset,
2972 relocation, addend);
2973 }
2974
2975 goto check_reloc;
2976
2977 case (int) R_M32R_SDA16_RELA:
2978 case (int) R_M32R_SDA16 :
2979 {
2980 const char *name;
2981
2982 BFD_ASSERT (sec != NULL);
2983 name = bfd_get_section_name (sec->owner, sec);
2984
2985 if ( strcmp (name, ".sdata") == 0
2986 || strcmp (name, ".sbss") == 0
2987 || strcmp (name, ".scommon") == 0)
2988 {
2989 bfd_vma sda_base;
2990 bfd *out_bfd = sec->output_section->owner;
2991
2992 r = m32r_elf_final_sda_base (out_bfd, info,
2993 &errmsg,
2994 &sda_base);
2995 if (r != bfd_reloc_ok)
2996 {
2997 ret = FALSE;
2998 goto check_reloc;
2999 }
3000
3001 /* At this point `relocation' contains the object's
3002 address. */
3003 relocation -= sda_base;
3004 /* Now it contains the offset from _SDA_BASE_. */
3005 }
3006 else
3007 {
3008 (*_bfd_error_handler)
3009 (_("%B: The target (%s) of an %s relocation is in the wrong section (%A)"),
3010 input_bfd,
3011 sec,
3012 sym_name,
3013 m32r_elf_howto_table[(int) r_type].name);
3014 /*bfd_set_error (bfd_error_bad_value); ??? why? */
3015 ret = FALSE;
3016 continue;
3017 }
3018 }
3019 /* Fall through. */
3020
3021 default : /* OLD_M32R_RELOC */
3022
3023 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3024 contents, offset,
3025 relocation, addend);
3026 goto check_reloc;
3027 }
3028
3029 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3030 contents, rel->r_offset,
3031 relocation, rel->r_addend);
3032
3033 }
3034
3035 check_reloc:
3036
3037 if (r != bfd_reloc_ok)
3038 {
3039 /* FIXME: This should be generic enough to go in a utility. */
3040 const char *name;
3041
3042 if (h != NULL)
3043 name = h->root.root.string;
3044 else
3045 {
3046 name = (bfd_elf_string_from_elf_section
3047 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3048 if (name == NULL || *name == '\0')
3049 name = bfd_section_name (input_bfd, sec);
3050 }
3051
3052 if (errmsg != NULL)
3053 goto common_error;
3054
3055 switch (r)
3056 {
3057 case bfd_reloc_overflow:
3058 if (! ((*info->callbacks->reloc_overflow)
3059 (info, (h ? &h->root : NULL), name, howto->name,
3060 (bfd_vma) 0, input_bfd, input_section, offset)))
3061 return FALSE;
3062 break;
3063
3064 case bfd_reloc_undefined:
3065 if (! ((*info->callbacks->undefined_symbol)
3066 (info, name, input_bfd, input_section,
3067 offset, TRUE)))
3068 return FALSE;
3069 break;
3070
3071 case bfd_reloc_outofrange:
3072 errmsg = _("internal error: out of range error");
3073 goto common_error;
3074
3075 case bfd_reloc_notsupported:
3076 errmsg = _("internal error: unsupported relocation error");
3077 goto common_error;
3078
3079 case bfd_reloc_dangerous:
3080 errmsg = _("internal error: dangerous error");
3081 goto common_error;
3082
3083 default:
3084 errmsg = _("internal error: unknown error");
3085 /* fall through */
3086
3087 common_error:
3088 if (!((*info->callbacks->warning)
3089 (info, errmsg, name, input_bfd, input_section,
3090 offset)))
3091 return FALSE;
3092 break;
3093 }
3094 }
3095 }
3096
3097 return ret;
3098 }
3099
3100 /* Finish up dynamic symbol handling. We set the contents of various
3101 dynamic sections here. */
3102
3103 static bfd_boolean
m32r_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3104 m32r_elf_finish_dynamic_symbol (bfd *output_bfd,
3105 struct bfd_link_info *info,
3106 struct elf_link_hash_entry *h,
3107 Elf_Internal_Sym *sym)
3108 {
3109 struct elf_m32r_link_hash_table *htab;
3110 bfd_byte *loc;
3111
3112 #ifdef DEBUG_PIC
3113 printf ("m32r_elf_finish_dynamic_symbol()\n");
3114 #endif
3115
3116 htab = m32r_elf_hash_table (info);
3117 if (htab == NULL)
3118 return FALSE;
3119
3120 if (h->plt.offset != (bfd_vma) -1)
3121 {
3122 asection *splt;
3123 asection *sgot;
3124 asection *srela;
3125
3126 bfd_vma plt_index;
3127 bfd_vma got_offset;
3128 Elf_Internal_Rela rela;
3129
3130 /* This symbol has an entry in the procedure linkage table. Set
3131 it up. */
3132
3133 BFD_ASSERT (h->dynindx != -1);
3134
3135 splt = htab->splt;
3136 sgot = htab->sgotplt;
3137 srela = htab->srelplt;
3138 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3139
3140 /* Get the index in the procedure linkage table which
3141 corresponds to this symbol. This is the index of this symbol
3142 in all the symbols for which we are making plt entries. The
3143 first entry in the procedure linkage table is reserved. */
3144 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3145
3146 /* Get the offset into the .got table of the entry that
3147 corresponds to this function. Each .got entry is 4 bytes.
3148 The first three are reserved. */
3149 got_offset = (plt_index + 3) * 4;
3150
3151 /* Fill in the entry in the procedure linkage table. */
3152 if (! info->shared)
3153 {
3154 bfd_put_32 (output_bfd,
3155 (PLT_ENTRY_WORD0b
3156 + (((sgot->output_section->vma
3157 + sgot->output_offset
3158 + got_offset) >> 16) & 0xffff)),
3159 splt->contents + h->plt.offset);
3160 bfd_put_32 (output_bfd,
3161 (PLT_ENTRY_WORD1b
3162 + ((sgot->output_section->vma
3163 + sgot->output_offset
3164 + got_offset) & 0xffff)),
3165 splt->contents + h->plt.offset + 4);
3166 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
3167 splt->contents + h->plt.offset + 8);
3168 bfd_put_32 (output_bfd,
3169 (PLT_ENTRY_WORD3
3170 + plt_index * sizeof (Elf32_External_Rela)),
3171 splt->contents + h->plt.offset + 12);
3172 bfd_put_32 (output_bfd,
3173 (PLT_ENTRY_WORD4
3174 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)),
3175 splt->contents + h->plt.offset + 16);
3176 }
3177 else
3178 {
3179 bfd_put_32 (output_bfd,
3180 PLT_ENTRY_WORD0 + got_offset,
3181 splt->contents + h->plt.offset);
3182 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1,
3183 splt->contents + h->plt.offset + 4);
3184 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
3185 splt->contents + h->plt.offset + 8);
3186 bfd_put_32 (output_bfd,
3187 (PLT_ENTRY_WORD3
3188 + plt_index * sizeof (Elf32_External_Rela)),
3189 splt->contents + h->plt.offset + 12);
3190 bfd_put_32 (output_bfd,
3191 (PLT_ENTRY_WORD4
3192 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)),
3193 splt->contents + h->plt.offset + 16);
3194 }
3195
3196 /* Fill in the entry in the global offset table. */
3197 bfd_put_32 (output_bfd,
3198 (splt->output_section->vma
3199 + splt->output_offset
3200 + h->plt.offset
3201 + 12), /* same offset */
3202 sgot->contents + got_offset);
3203
3204 /* Fill in the entry in the .rela.plt section. */
3205 rela.r_offset = (sgot->output_section->vma
3206 + sgot->output_offset
3207 + got_offset);
3208 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT);
3209 rela.r_addend = 0;
3210 loc = srela->contents;
3211 loc += plt_index * sizeof (Elf32_External_Rela);
3212 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3213
3214 if (!h->def_regular)
3215 {
3216 /* Mark the symbol as undefined, rather than as defined in
3217 the .plt section. Leave the value alone. */
3218 sym->st_shndx = SHN_UNDEF;
3219 }
3220 }
3221
3222 if (h->got.offset != (bfd_vma) -1)
3223 {
3224 asection *sgot;
3225 asection *srela;
3226 Elf_Internal_Rela rela;
3227
3228 /* This symbol has an entry in the global offset table. Set it
3229 up. */
3230
3231 sgot = htab->sgot;
3232 srela = htab->srelgot;
3233 BFD_ASSERT (sgot != NULL && srela != NULL);
3234
3235 rela.r_offset = (sgot->output_section->vma
3236 + sgot->output_offset
3237 + (h->got.offset &~ 1));
3238
3239 /* If this is a -Bsymbolic link, and the symbol is defined
3240 locally, we just want to emit a RELATIVE reloc. Likewise if
3241 the symbol was forced to be local because of a version file.
3242 The entry in the global offset table will already have been
3243 initialized in the relocate_section function. */
3244 if (info->shared
3245 && (info->symbolic
3246 || h->dynindx == -1
3247 || h->forced_local)
3248 && h->def_regular)
3249 {
3250 rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE);
3251 rela.r_addend = (h->root.u.def.value
3252 + h->root.u.def.section->output_section->vma
3253 + h->root.u.def.section->output_offset);
3254 }
3255 else
3256 {
3257 BFD_ASSERT ((h->got.offset & 1) == 0);
3258 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3259 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT);
3260 rela.r_addend = 0;
3261 }
3262
3263 loc = srela->contents;
3264 loc += srela->reloc_count * sizeof (Elf32_External_Rela);
3265 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3266 ++srela->reloc_count;
3267 }
3268
3269 if (h->needs_copy)
3270 {
3271 asection *s;
3272 Elf_Internal_Rela rela;
3273
3274 /* This symbols needs a copy reloc. Set it up. */
3275
3276 BFD_ASSERT (h->dynindx != -1
3277 && (h->root.type == bfd_link_hash_defined
3278 || h->root.type == bfd_link_hash_defweak));
3279
3280 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss");
3281 BFD_ASSERT (s != NULL);
3282
3283 rela.r_offset = (h->root.u.def.value
3284 + h->root.u.def.section->output_section->vma
3285 + h->root.u.def.section->output_offset);
3286 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY);
3287 rela.r_addend = 0;
3288 loc = s->contents;
3289 loc += s->reloc_count * sizeof (Elf32_External_Rela);
3290 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3291 ++s->reloc_count;
3292 }
3293
3294 /* Mark some specially defined symbols as absolute. */
3295 if (h == htab->root.hdynamic || h == htab->root.hgot)
3296 sym->st_shndx = SHN_ABS;
3297
3298 return TRUE;
3299 }
3300
3301
3302 /* Finish up the dynamic sections. */
3303
3304 static bfd_boolean
m32r_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)3305 m32r_elf_finish_dynamic_sections (bfd *output_bfd,
3306 struct bfd_link_info *info)
3307 {
3308 struct elf_m32r_link_hash_table *htab;
3309 bfd *dynobj;
3310 asection *sdyn;
3311 asection *sgot;
3312
3313 #ifdef DEBUG_PIC
3314 printf ("m32r_elf_finish_dynamic_sections()\n");
3315 #endif
3316
3317 htab = m32r_elf_hash_table (info);
3318 if (htab == NULL)
3319 return FALSE;
3320
3321 dynobj = htab->root.dynobj;
3322
3323 sgot = htab->sgotplt;
3324 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3325
3326 if (htab->root.dynamic_sections_created)
3327 {
3328 asection *splt;
3329 Elf32_External_Dyn *dyncon, *dynconend;
3330
3331 BFD_ASSERT (sgot != NULL && sdyn != NULL);
3332
3333 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3334 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3335
3336 for (; dyncon < dynconend; dyncon++)
3337 {
3338 Elf_Internal_Dyn dyn;
3339 asection *s;
3340
3341 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3342
3343 switch (dyn.d_tag)
3344 {
3345 default:
3346 break;
3347
3348 case DT_PLTGOT:
3349 s = htab->sgot->output_section;
3350 goto get_vma;
3351 case DT_JMPREL:
3352 s = htab->srelplt->output_section;
3353 get_vma:
3354 BFD_ASSERT (s != NULL);
3355 dyn.d_un.d_ptr = s->vma;
3356 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3357 break;
3358
3359 case DT_PLTRELSZ:
3360 s = htab->srelplt->output_section;
3361 BFD_ASSERT (s != NULL);
3362 dyn.d_un.d_val = s->size;
3363 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3364 break;
3365
3366 case DT_RELASZ:
3367 /* My reading of the SVR4 ABI indicates that the
3368 procedure linkage table relocs (DT_JMPREL) should be
3369 included in the overall relocs (DT_RELA). This is
3370 what Solaris does. However, UnixWare can not handle
3371 that case. Therefore, we override the DT_RELASZ entry
3372 here to make it not include the JMPREL relocs. Since
3373 the linker script arranges for .rela.plt to follow all
3374 other relocation sections, we don't have to worry
3375 about changing the DT_RELA entry. */
3376 if (htab->srelplt != NULL)
3377 {
3378 s = htab->srelplt->output_section;
3379 dyn.d_un.d_val -= s->size;
3380 }
3381 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3382 break;
3383 }
3384 }
3385
3386 /* Fill in the first entry in the procedure linkage table. */
3387 splt = htab->splt;
3388 if (splt && splt->size > 0)
3389 {
3390 if (info->shared)
3391 {
3392 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
3393 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
3394 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
3395 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
3396 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
3397 }
3398 else
3399 {
3400 unsigned long addr;
3401 /* addr = .got + 4 */
3402 addr = sgot->output_section->vma + sgot->output_offset + 4;
3403 bfd_put_32 (output_bfd,
3404 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
3405 splt->contents);
3406 bfd_put_32 (output_bfd,
3407 PLT0_ENTRY_WORD1 | (addr & 0xffff),
3408 splt->contents + 4);
3409 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
3410 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
3411 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
3412 }
3413
3414 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3415 PLT_ENTRY_SIZE;
3416 }
3417 }
3418
3419 /* Fill in the first three entries in the global offset table. */
3420 if (sgot && sgot->size > 0)
3421 {
3422 if (sdyn == NULL)
3423 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3424 else
3425 bfd_put_32 (output_bfd,
3426 sdyn->output_section->vma + sdyn->output_offset,
3427 sgot->contents);
3428 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3429 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3430
3431 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3432 }
3433
3434 return TRUE;
3435 }
3436
3437
3438 /* Set the right machine number. */
3439
3440 static bfd_boolean
m32r_elf_object_p(bfd * abfd)3441 m32r_elf_object_p (bfd *abfd)
3442 {
3443 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
3444 {
3445 default:
3446 case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break;
3447 case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break;
3448 case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break;
3449 }
3450 return TRUE;
3451 }
3452
3453 /* Store the machine number in the flags field. */
3454
3455 static void
m32r_elf_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)3456 m32r_elf_final_write_processing (bfd *abfd,
3457 bfd_boolean linker ATTRIBUTE_UNUSED)
3458 {
3459 unsigned long val;
3460
3461 switch (bfd_get_mach (abfd))
3462 {
3463 default:
3464 case bfd_mach_m32r: val = E_M32R_ARCH; break;
3465 case bfd_mach_m32rx: val = E_M32RX_ARCH; break;
3466 case bfd_mach_m32r2: val = E_M32R2_ARCH; break;
3467 }
3468
3469 elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH;
3470 elf_elfheader (abfd)->e_flags |= val;
3471 }
3472
3473 /* Function to keep M32R specific file flags. */
3474
3475 static bfd_boolean
m32r_elf_set_private_flags(bfd * abfd,flagword flags)3476 m32r_elf_set_private_flags (bfd *abfd, flagword flags)
3477 {
3478 BFD_ASSERT (!elf_flags_init (abfd)
3479 || elf_elfheader (abfd)->e_flags == flags);
3480
3481 elf_elfheader (abfd)->e_flags = flags;
3482 elf_flags_init (abfd) = TRUE;
3483 return TRUE;
3484 }
3485
3486 /* Merge backend specific data from an object file to the output
3487 object file when linking. */
3488
3489 static bfd_boolean
m32r_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)3490 m32r_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3491 {
3492 flagword out_flags;
3493 flagword in_flags;
3494
3495 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3496 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3497 return TRUE;
3498
3499 in_flags = elf_elfheader (ibfd)->e_flags;
3500 out_flags = elf_elfheader (obfd)->e_flags;
3501
3502 if (! elf_flags_init (obfd))
3503 {
3504 /* If the input is the default architecture then do not
3505 bother setting the flags for the output architecture,
3506 instead allow future merges to do this. If no future
3507 merges ever set these flags then they will retain their
3508 unitialised values, which surprise surprise, correspond
3509 to the default values. */
3510 if (bfd_get_arch_info (ibfd)->the_default)
3511 return TRUE;
3512
3513 elf_flags_init (obfd) = TRUE;
3514 elf_elfheader (obfd)->e_flags = in_flags;
3515
3516 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3517 && bfd_get_arch_info (obfd)->the_default)
3518 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3519 bfd_get_mach (ibfd));
3520
3521 return TRUE;
3522 }
3523
3524 /* Check flag compatibility. */
3525 if (in_flags == out_flags)
3526 return TRUE;
3527
3528 if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH))
3529 {
3530 if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH)
3531 || ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH)
3532 || ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH))
3533 {
3534 (*_bfd_error_handler)
3535 (_("%B: Instruction set mismatch with previous modules"), ibfd);
3536
3537 bfd_set_error (bfd_error_bad_value);
3538 return FALSE;
3539 }
3540 }
3541
3542 return TRUE;
3543 }
3544
3545 /* Display the flags field. */
3546
3547 static bfd_boolean
m32r_elf_print_private_bfd_data(bfd * abfd,void * ptr)3548 m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr)
3549 {
3550 FILE * file = (FILE *) ptr;
3551
3552 BFD_ASSERT (abfd != NULL && ptr != NULL);
3553
3554 _bfd_elf_print_private_bfd_data (abfd, ptr);
3555
3556 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags);
3557
3558 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
3559 {
3560 default:
3561 case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break;
3562 case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break;
3563 case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break;
3564 }
3565
3566 fputc ('\n', file);
3567
3568 return TRUE;
3569 }
3570
3571 static asection *
m32r_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3572 m32r_elf_gc_mark_hook (asection *sec,
3573 struct bfd_link_info *info,
3574 Elf_Internal_Rela *rel,
3575 struct elf_link_hash_entry *h,
3576 Elf_Internal_Sym *sym)
3577 {
3578 if (h != NULL)
3579 switch (ELF32_R_TYPE (rel->r_info))
3580 {
3581 case R_M32R_GNU_VTINHERIT:
3582 case R_M32R_GNU_VTENTRY:
3583 case R_M32R_RELA_GNU_VTINHERIT:
3584 case R_M32R_RELA_GNU_VTENTRY:
3585 return NULL;
3586 }
3587
3588 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3589 }
3590
3591 static bfd_boolean
m32r_elf_gc_sweep_hook(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,asection * sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)3592 m32r_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3593 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3594 asection *sec ATTRIBUTE_UNUSED,
3595 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3596 {
3597 /* Update the got entry reference counts for the section being removed. */
3598 Elf_Internal_Shdr *symtab_hdr;
3599 struct elf_link_hash_entry **sym_hashes;
3600 bfd_signed_vma *local_got_refcounts;
3601 const Elf_Internal_Rela *rel, *relend;
3602
3603 if (info->relocatable)
3604 return TRUE;
3605
3606 elf_section_data (sec)->local_dynrel = NULL;
3607
3608 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3609 sym_hashes = elf_sym_hashes (abfd);
3610 local_got_refcounts = elf_local_got_refcounts (abfd);
3611
3612 relend = relocs + sec->reloc_count;
3613 for (rel = relocs; rel < relend; rel++)
3614 {
3615 unsigned long r_symndx;
3616 struct elf_link_hash_entry *h = NULL;
3617
3618 r_symndx = ELF32_R_SYM (rel->r_info);
3619 if (r_symndx >= symtab_hdr->sh_info)
3620 {
3621 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3622 while (h->root.type == bfd_link_hash_indirect
3623 || h->root.type == bfd_link_hash_warning)
3624 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3625 }
3626
3627 switch (ELF32_R_TYPE (rel->r_info))
3628 {
3629 case R_M32R_GOT16_HI_ULO:
3630 case R_M32R_GOT16_HI_SLO:
3631 case R_M32R_GOT16_LO:
3632 case R_M32R_GOTOFF:
3633 case R_M32R_GOTOFF_HI_ULO:
3634 case R_M32R_GOTOFF_HI_SLO:
3635 case R_M32R_GOTOFF_LO:
3636 case R_M32R_GOT24:
3637 case R_M32R_GOTPC_HI_ULO:
3638 case R_M32R_GOTPC_HI_SLO:
3639 case R_M32R_GOTPC_LO:
3640 case R_M32R_GOTPC24:
3641 if (h != NULL)
3642 {
3643 if (h->got.refcount > 0)
3644 h->got.refcount--;
3645 }
3646 else
3647 {
3648 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
3649 local_got_refcounts[r_symndx]--;
3650 }
3651 break;
3652
3653 case R_M32R_16_RELA:
3654 case R_M32R_24_RELA:
3655 case R_M32R_32_RELA:
3656 case R_M32R_REL32:
3657 case R_M32R_HI16_ULO_RELA:
3658 case R_M32R_HI16_SLO_RELA:
3659 case R_M32R_LO16_RELA:
3660 case R_M32R_SDA16_RELA:
3661 case R_M32R_10_PCREL_RELA:
3662 case R_M32R_18_PCREL_RELA:
3663 case R_M32R_26_PCREL_RELA:
3664 if (h != NULL)
3665 {
3666 struct elf_m32r_link_hash_entry *eh;
3667 struct elf_m32r_dyn_relocs **pp;
3668 struct elf_m32r_dyn_relocs *p;
3669
3670 if (!info->shared && h->plt.refcount > 0)
3671 h->plt.refcount -= 1;
3672
3673 eh = (struct elf_m32r_link_hash_entry *) h;
3674
3675 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3676 if (p->sec == sec)
3677 {
3678 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA
3679 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA
3680 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA
3681 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32)
3682 p->pc_count -= 1;
3683 p->count -= 1;
3684 if (p->count == 0)
3685 *pp = p->next;
3686 break;
3687 }
3688 }
3689 break;
3690
3691 case R_M32R_26_PLTREL:
3692 if (h != NULL)
3693 {
3694 if (h->plt.refcount > 0)
3695 h->plt.refcount--;
3696 }
3697 break;
3698
3699 default:
3700 break;
3701 }
3702 }
3703
3704 return TRUE;
3705 }
3706
3707 /* Look through the relocs for a section during the first phase.
3708 Since we don't do .gots or .plts, we just need to consider the
3709 virtual table relocs for gc. */
3710
3711 static bfd_boolean
m32r_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3712 m32r_elf_check_relocs (bfd *abfd,
3713 struct bfd_link_info *info,
3714 asection *sec,
3715 const Elf_Internal_Rela *relocs)
3716 {
3717 Elf_Internal_Shdr *symtab_hdr;
3718 struct elf_link_hash_entry **sym_hashes;
3719 const Elf_Internal_Rela *rel;
3720 const Elf_Internal_Rela *rel_end;
3721 struct elf_m32r_link_hash_table *htab;
3722 bfd *dynobj;
3723 asection *sreloc;
3724
3725 if (info->relocatable)
3726 return TRUE;
3727
3728 sreloc = NULL;
3729 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3730 sym_hashes = elf_sym_hashes (abfd);
3731
3732 htab = m32r_elf_hash_table (info);
3733 if (htab == NULL)
3734 return FALSE;
3735
3736 dynobj = htab->root.dynobj;
3737
3738 rel_end = relocs + sec->reloc_count;
3739 for (rel = relocs; rel < rel_end; rel++)
3740 {
3741 int r_type;
3742 struct elf_link_hash_entry *h;
3743 unsigned long r_symndx;
3744
3745 r_symndx = ELF32_R_SYM (rel->r_info);
3746 r_type = ELF32_R_TYPE (rel->r_info);
3747 if (r_symndx < symtab_hdr->sh_info)
3748 h = NULL;
3749 else
3750 {
3751 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3752 while (h->root.type == bfd_link_hash_indirect
3753 || h->root.type == bfd_link_hash_warning)
3754 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3755
3756 /* PR15323, ref flags aren't set for references in the same
3757 object. */
3758 h->root.non_ir_ref = 1;
3759 }
3760
3761 /* Some relocs require a global offset table. */
3762 if (htab->sgot == NULL)
3763 {
3764 switch (r_type)
3765 {
3766 case R_M32R_GOT16_HI_ULO:
3767 case R_M32R_GOT16_HI_SLO:
3768 case R_M32R_GOTOFF:
3769 case R_M32R_GOTOFF_HI_ULO:
3770 case R_M32R_GOTOFF_HI_SLO:
3771 case R_M32R_GOTOFF_LO:
3772 case R_M32R_GOT16_LO:
3773 case R_M32R_GOTPC24:
3774 case R_M32R_GOTPC_HI_ULO:
3775 case R_M32R_GOTPC_HI_SLO:
3776 case R_M32R_GOTPC_LO:
3777 case R_M32R_GOT24:
3778 if (dynobj == NULL)
3779 htab->root.dynobj = dynobj = abfd;
3780 if (! create_got_section (dynobj, info))
3781 return FALSE;
3782 break;
3783
3784 default:
3785 break;
3786 }
3787 }
3788
3789 switch (r_type)
3790 {
3791 case R_M32R_GOT16_HI_ULO:
3792 case R_M32R_GOT16_HI_SLO:
3793 case R_M32R_GOT16_LO:
3794 case R_M32R_GOT24:
3795
3796 if (h != NULL)
3797 h->got.refcount += 1;
3798 else
3799 {
3800 bfd_signed_vma *local_got_refcounts;
3801
3802 /* This is a global offset table entry for a local
3803 symbol. */
3804 local_got_refcounts = elf_local_got_refcounts (abfd);
3805 if (local_got_refcounts == NULL)
3806 {
3807 bfd_size_type size;
3808
3809 size = symtab_hdr->sh_info;
3810 size *= sizeof (bfd_signed_vma);
3811 local_got_refcounts = bfd_zalloc (abfd, size);
3812 if (local_got_refcounts == NULL)
3813 return FALSE;
3814 elf_local_got_refcounts (abfd) = local_got_refcounts;
3815 }
3816 local_got_refcounts[r_symndx] += 1;
3817 }
3818 break;
3819
3820 case R_M32R_26_PLTREL:
3821 /* This symbol requires a procedure linkage table entry. We
3822 actually build the entry in adjust_dynamic_symbol,
3823 because this might be a case of linking PIC code without
3824 linking in any dynamic objects, in which case we don't
3825 need to generate a procedure linkage table after all. */
3826
3827 /* If this is a local symbol, we resolve it directly without
3828 creating a procedure linkage table entry. */
3829 if (h == NULL)
3830 continue;
3831
3832 if (h->forced_local)
3833 break;
3834
3835 h->needs_plt = 1;
3836 h->plt.refcount += 1;
3837 break;
3838
3839 case R_M32R_16_RELA:
3840 case R_M32R_24_RELA:
3841 case R_M32R_32_RELA:
3842 case R_M32R_REL32:
3843 case R_M32R_HI16_ULO_RELA:
3844 case R_M32R_HI16_SLO_RELA:
3845 case R_M32R_LO16_RELA:
3846 case R_M32R_SDA16_RELA:
3847 case R_M32R_10_PCREL_RELA:
3848 case R_M32R_18_PCREL_RELA:
3849 case R_M32R_26_PCREL_RELA:
3850
3851 if (h != NULL && !info->shared)
3852 {
3853 h->non_got_ref = 1;
3854 h->plt.refcount += 1;
3855 }
3856
3857 /* If we are creating a shared library, and this is a reloc
3858 against a global symbol, or a non PC relative reloc
3859 against a local symbol, then we need to copy the reloc
3860 into the shared library. However, if we are linking with
3861 -Bsymbolic, we do not need to copy a reloc against a
3862 global symbol which is defined in an object we are
3863 including in the link (i.e., DEF_REGULAR is set). At
3864 this point we have not seen all the input files, so it is
3865 possible that DEF_REGULAR is not set now but will be set
3866 later (it is never cleared). We account for that
3867 possibility below by storing information in the
3868 dyn_relocs field of the hash table entry. A similar
3869 situation occurs when creating shared libraries and symbol
3870 visibility changes render the symbol local.
3871
3872 If on the other hand, we are creating an executable, we
3873 may need to keep relocations for symbols satisfied by a
3874 dynamic library if we manage to avoid copy relocs for the
3875 symbol. */
3876 if ((info->shared
3877 && (sec->flags & SEC_ALLOC) != 0
3878 && (( r_type != R_M32R_26_PCREL_RELA
3879 && r_type != R_M32R_18_PCREL_RELA
3880 && r_type != R_M32R_10_PCREL_RELA
3881 && r_type != R_M32R_REL32)
3882 || (h != NULL
3883 && (! info->symbolic
3884 || h->root.type == bfd_link_hash_defweak
3885 || !h->def_regular))))
3886 || (!info->shared
3887 && (sec->flags & SEC_ALLOC) != 0
3888 && h != NULL
3889 && (h->root.type == bfd_link_hash_defweak
3890 || !h->def_regular)))
3891 {
3892 struct elf_m32r_dyn_relocs *p;
3893 struct elf_m32r_dyn_relocs **head;
3894
3895 if (dynobj == NULL)
3896 htab->root.dynobj = dynobj = abfd;
3897
3898 /* When creating a shared object, we must copy these
3899 relocs into the output file. We create a reloc
3900 section in dynobj and make room for the reloc. */
3901 if (sreloc == NULL)
3902 {
3903 sreloc = _bfd_elf_make_dynamic_reloc_section
3904 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3905
3906 if (sreloc == NULL)
3907 return FALSE;
3908 }
3909
3910 /* If this is a global symbol, we count the number of
3911 relocations we need for this symbol. */
3912 if (h != NULL)
3913 head = &((struct elf_m32r_link_hash_entry *) h)->dyn_relocs;
3914 else
3915 {
3916 /* Track dynamic relocs needed for local syms too. */
3917 asection *s;
3918 void *vpp;
3919 Elf_Internal_Sym *isym;
3920
3921 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3922 abfd, r_symndx);
3923 if (isym == NULL)
3924 return FALSE;
3925
3926 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3927 if (s == NULL)
3928 s = sec;
3929
3930 vpp = &elf_section_data (s)->local_dynrel;
3931 head = (struct elf_m32r_dyn_relocs **) vpp;
3932 }
3933
3934 p = *head;
3935 if (p == NULL || p->sec != sec)
3936 {
3937 bfd_size_type amt = sizeof (*p);
3938
3939 p = bfd_alloc (dynobj, amt);
3940 if (p == NULL)
3941 return FALSE;
3942 p->next = *head;
3943 *head = p;
3944 p->sec = sec;
3945 p->count = 0;
3946 p->pc_count = 0;
3947 }
3948
3949 p->count += 1;
3950 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA
3951 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA
3952 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA
3953 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32)
3954 p->pc_count += 1;
3955 }
3956 break;
3957
3958 /* This relocation describes the C++ object vtable hierarchy.
3959 Reconstruct it for later use during GC. */
3960 case R_M32R_RELA_GNU_VTINHERIT:
3961 case R_M32R_GNU_VTINHERIT:
3962 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3963 return FALSE;
3964 break;
3965
3966 /* This relocation describes which C++ vtable entries are actually
3967 used. Record for later use during GC. */
3968 case R_M32R_GNU_VTENTRY:
3969 BFD_ASSERT (h != NULL);
3970 if (h != NULL
3971 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
3972 return FALSE;
3973 break;
3974 case R_M32R_RELA_GNU_VTENTRY:
3975 BFD_ASSERT (h != NULL);
3976 if (h != NULL
3977 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3978 return FALSE;
3979 break;
3980 }
3981 }
3982
3983 return TRUE;
3984 }
3985
3986 static const struct bfd_elf_special_section m32r_elf_special_sections[] =
3987 {
3988 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3989 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3990 { NULL, 0, 0, 0, 0 }
3991 };
3992
3993 static enum elf_reloc_type_class
m32r_elf_reloc_type_class(const struct bfd_link_info * info ATTRIBUTE_UNUSED,const asection * rel_sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * rela)3994 m32r_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3995 const asection *rel_sec ATTRIBUTE_UNUSED,
3996 const Elf_Internal_Rela *rela)
3997 {
3998 switch ((int) ELF32_R_TYPE (rela->r_info))
3999 {
4000 case R_M32R_RELATIVE: return reloc_class_relative;
4001 case R_M32R_JMP_SLOT: return reloc_class_plt;
4002 case R_M32R_COPY: return reloc_class_copy;
4003 default: return reloc_class_normal;
4004 }
4005 }
4006
4007 #define ELF_ARCH bfd_arch_m32r
4008 #define ELF_TARGET_ID M32R_ELF_DATA
4009 #define ELF_MACHINE_CODE EM_M32R
4010 #define ELF_MACHINE_ALT1 EM_CYGNUS_M32R
4011 #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */
4012
4013 #define TARGET_BIG_SYM m32r_elf32_vec
4014 #define TARGET_BIG_NAME "elf32-m32r"
4015 #define TARGET_LITTLE_SYM m32r_elf32_le_vec
4016 #define TARGET_LITTLE_NAME "elf32-m32rle"
4017
4018 #define elf_info_to_howto m32r_info_to_howto
4019 #define elf_info_to_howto_rel m32r_info_to_howto_rel
4020 #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section
4021 #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing
4022 #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook
4023 #define elf_backend_relocate_section m32r_elf_relocate_section
4024 #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook
4025 #define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook
4026 #define elf_backend_check_relocs m32r_elf_check_relocs
4027
4028 #define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections
4029 #define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create
4030 #define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections
4031 #define elf_backend_omit_section_dynsym \
4032 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4033 #define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections
4034 #define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol
4035 #define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol
4036 #define elf_backend_reloc_type_class m32r_elf_reloc_type_class
4037 #define elf_backend_copy_indirect_symbol m32r_elf_copy_indirect_symbol
4038
4039 #define elf_backend_can_gc_sections 1
4040 /*#if !USE_REL
4041 #define elf_backend_rela_normal 1
4042 #endif*/
4043 #define elf_backend_can_refcount 1
4044 #define elf_backend_want_got_plt 1
4045 #define elf_backend_plt_readonly 1
4046 #define elf_backend_want_plt_sym 0
4047 #define elf_backend_got_header_size 12
4048
4049 #define elf_backend_may_use_rel_p 1
4050 #ifdef USE_M32R_OLD_RELOC
4051 #define elf_backend_default_use_rela_p 0
4052 #define elf_backend_may_use_rela_p 0
4053 #else
4054 #define elf_backend_default_use_rela_p 1
4055 #define elf_backend_may_use_rela_p 1
4056 #endif
4057
4058 #define elf_backend_object_p m32r_elf_object_p
4059 #define elf_backend_final_write_processing m32r_elf_final_write_processing
4060 #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data
4061 #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags
4062 #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data
4063 #define elf_backend_special_sections m32r_elf_special_sections
4064
4065 #include "elf32-target.h"
4066
4067 #undef ELF_MAXPAGESIZE
4068 #define ELF_MAXPAGESIZE 0x1000
4069
4070 #undef TARGET_BIG_SYM
4071 #define TARGET_BIG_SYM m32r_elf32_linux_vec
4072 #undef TARGET_BIG_NAME
4073 #define TARGET_BIG_NAME "elf32-m32r-linux"
4074 #undef TARGET_LITTLE_SYM
4075 #define TARGET_LITTLE_SYM m32r_elf32_linux_le_vec
4076 #undef TARGET_LITTLE_NAME
4077 #define TARGET_LITTLE_NAME "elf32-m32rle-linux"
4078 #undef elf32_bed
4079 #define elf32_bed elf32_m32r_lin_bed
4080
4081 #include "elf32-target.h"
4082
4083