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* bfd/elf32-arm.h (arm_print_private_bfd_data): Add EABI v3.
[binutils.git] / bfd / elf32-m68k.c
blobf1bdd1a8f1bcf621c9fa76b3c1b857b8140f459e
1 /* Motorola 68k series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "bfdlink.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf/m68k.h"
27
28 static reloc_howto_type *reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30 static void rtype_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32 static struct bfd_hash_entry *elf_m68k_link_hash_newfunc
33 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
34 static struct bfd_link_hash_table *elf_m68k_link_hash_table_create
35 PARAMS ((bfd *));
36 static bfd_boolean elf_m68k_check_relocs
37 PARAMS ((bfd *, struct bfd_link_info *, asection *,
38 const Elf_Internal_Rela *));
39 static asection *elf_m68k_gc_mark_hook
40 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
41 struct elf_link_hash_entry *, Elf_Internal_Sym *));
42 static bfd_boolean elf_m68k_gc_sweep_hook
43 PARAMS ((bfd *, struct bfd_link_info *, asection *,
44 const Elf_Internal_Rela *));
45 static bfd_boolean elf_m68k_adjust_dynamic_symbol
46 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
47 static bfd_boolean elf_m68k_size_dynamic_sections
48 PARAMS ((bfd *, struct bfd_link_info *));
49 static bfd_boolean elf_m68k_discard_copies
50 PARAMS ((struct elf_link_hash_entry *, PTR));
51 static bfd_boolean elf_m68k_relocate_section
52 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
53 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
54 static bfd_boolean elf_m68k_finish_dynamic_symbol
55 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
56 Elf_Internal_Sym *));
57 static bfd_boolean elf_m68k_finish_dynamic_sections
58 PARAMS ((bfd *, struct bfd_link_info *));
59
60 static bfd_boolean elf32_m68k_set_private_flags
61 PARAMS ((bfd *, flagword));
62 static bfd_boolean elf32_m68k_merge_private_bfd_data
63 PARAMS ((bfd *, bfd *));
64 static bfd_boolean elf32_m68k_print_private_bfd_data
65 PARAMS ((bfd *, PTR));
66 static enum elf_reloc_type_class elf32_m68k_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68
69 static reloc_howto_type howto_table[] = {
70 HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE),
71 HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE),
72 HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE),
73 HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE),
74 HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE),
75 HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE),
76 HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE),
77 HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE),
78 HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE),
79 HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE),
80 HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE),
81 HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE),
82 HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE),
83 HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE),
84 HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE),
85 HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE),
86 HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE),
87 HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE),
88 HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE),
89 HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE),
90 HOWTO(R_68K_GLOB_DAT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", FALSE, 0, 0xffffffff,FALSE),
91 HOWTO(R_68K_JMP_SLOT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", FALSE, 0, 0xffffffff,FALSE),
92 HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE),
93 /* GNU extension to record C++ vtable hierarchy. */
94 HOWTO (R_68K_GNU_VTINHERIT, /* type */
95 0, /* rightshift */
96 2, /* size (0 = byte, 1 = short, 2 = long) */
97 0, /* bitsize */
98 FALSE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_dont, /* complain_on_overflow */
101 NULL, /* special_function */
102 "R_68K_GNU_VTINHERIT", /* name */
103 FALSE, /* partial_inplace */
104 0, /* src_mask */
105 0, /* dst_mask */
106 FALSE),
107 /* GNU extension to record C++ vtable member usage. */
108 HOWTO (R_68K_GNU_VTENTRY, /* type */
109 0, /* rightshift */
110 2, /* size (0 = byte, 1 = short, 2 = long) */
111 0, /* bitsize */
112 FALSE, /* pc_relative */
113 0, /* bitpos */
114 complain_overflow_dont, /* complain_on_overflow */
115 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
116 "R_68K_GNU_VTENTRY", /* name */
117 FALSE, /* partial_inplace */
118 0, /* src_mask */
119 0, /* dst_mask */
120 FALSE),
121 };
122
123 static void
124 rtype_to_howto (abfd, cache_ptr, dst)
125 bfd *abfd ATTRIBUTE_UNUSED;
126 arelent *cache_ptr;
127 Elf_Internal_Rela *dst;
128 {
129 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max);
130 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
131 }
132
133 #define elf_info_to_howto rtype_to_howto
134
135 static const struct
136 {
137 bfd_reloc_code_real_type bfd_val;
138 int elf_val;
139 } reloc_map[] = {
140 { BFD_RELOC_NONE, R_68K_NONE },
141 { BFD_RELOC_32, R_68K_32 },
142 { BFD_RELOC_16, R_68K_16 },
143 { BFD_RELOC_8, R_68K_8 },
144 { BFD_RELOC_32_PCREL, R_68K_PC32 },
145 { BFD_RELOC_16_PCREL, R_68K_PC16 },
146 { BFD_RELOC_8_PCREL, R_68K_PC8 },
147 { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
148 { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
149 { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
150 { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
151 { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
152 { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
153 { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
154 { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
155 { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
156 { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
157 { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
158 { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
159 { BFD_RELOC_NONE, R_68K_COPY },
160 { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
161 { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
162 { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
163 { BFD_RELOC_CTOR, R_68K_32 },
164 { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
165 { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
166 };
167
168 static reloc_howto_type *
169 reloc_type_lookup (abfd, code)
170 bfd *abfd ATTRIBUTE_UNUSED;
171 bfd_reloc_code_real_type code;
172 {
173 unsigned int i;
174 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
175 {
176 if (reloc_map[i].bfd_val == code)
177 return &howto_table[reloc_map[i].elf_val];
178 }
179 return 0;
180 }
181
182 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
183 #define ELF_ARCH bfd_arch_m68k
184 \f
185 /* Functions for the m68k ELF linker. */
186
187 /* The name of the dynamic interpreter. This is put in the .interp
188 section. */
189
190 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
191
192 /* The size in bytes of an entry in the procedure linkage table. */
193
194 #define PLT_ENTRY_SIZE 20
195
196 /* The first entry in a procedure linkage table looks like this. See
197 the SVR4 ABI m68k supplement to see how this works. */
198
199 static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
200 {
201 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
202 0, 0, 0, 0, /* replaced with offset to .got + 4. */
203 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
204 0, 0, 0, 0, /* replaced with offset to .got + 8. */
205 0, 0, 0, 0 /* pad out to 20 bytes. */
206 };
207
208 /* Subsequent entries in a procedure linkage table look like this. */
209
210 static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
211 {
212 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
213 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */
214 0x2f, 0x3c, /* move.l #offset,-(%sp) */
215 0, 0, 0, 0, /* replaced with offset into relocation table. */
216 0x60, 0xff, /* bra.l .plt */
217 0, 0, 0, 0 /* replaced with offset to start of .plt. */
218 };
219
220 #define CPU32_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CPU32)
221
222 #define PLT_CPU32_ENTRY_SIZE 24
223 /* Procedure linkage table entries for the cpu32 */
224 static const bfd_byte elf_cpu32_plt0_entry[PLT_CPU32_ENTRY_SIZE] =
225 {
226 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
227 0, 0, 0, 0, /* replaced with offset to .got + 4. */
228 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
229 0, 0, 0, 0, /* replace with offset to .got +8. */
230 0x4e, 0xd1, /* jmp %a1@ */
231 0, 0, 0, 0, /* pad out to 24 bytes. */
232 0, 0
233 };
234
235 static const bfd_byte elf_cpu32_plt_entry[PLT_CPU32_ENTRY_SIZE] =
236 {
237 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
238 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */
239 0x4e, 0xd1, /* jmp %a1@ */
240 0x2f, 0x3c, /* move.l #offset,-(%sp) */
241 0, 0, 0, 0, /* replaced with offset into relocation table. */
242 0x60, 0xff, /* bra.l .plt */
243 0, 0, 0, 0, /* replaced with offset to start of .plt. */
244 0, 0
245 };
246
247 /* The m68k linker needs to keep track of the number of relocs that it
248 decides to copy in check_relocs for each symbol. This is so that it
249 can discard PC relative relocs if it doesn't need them when linking
250 with -Bsymbolic. We store the information in a field extending the
251 regular ELF linker hash table. */
252
253 /* This structure keeps track of the number of PC relative relocs we have
254 copied for a given symbol. */
255
256 struct elf_m68k_pcrel_relocs_copied
257 {
258 /* Next section. */
259 struct elf_m68k_pcrel_relocs_copied *next;
260 /* A section in dynobj. */
261 asection *section;
262 /* Number of relocs copied in this section. */
263 bfd_size_type count;
264 };
265
266 /* m68k ELF linker hash entry. */
267
268 struct elf_m68k_link_hash_entry
269 {
270 struct elf_link_hash_entry root;
271
272 /* Number of PC relative relocs copied for this symbol. */
273 struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
274 };
275
276 #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
277
278 /* m68k ELF linker hash table. */
279
280 struct elf_m68k_link_hash_table
281 {
282 struct elf_link_hash_table root;
283
284 /* Small local sym to section mapping cache. */
285 struct sym_sec_cache sym_sec;
286 };
287
288 /* Get the m68k ELF linker hash table from a link_info structure. */
289
290 #define elf_m68k_hash_table(p) \
291 ((struct elf_m68k_link_hash_table *) (p)->hash)
292
293 /* Create an entry in an m68k ELF linker hash table. */
294
295 static struct bfd_hash_entry *
296 elf_m68k_link_hash_newfunc (entry, table, string)
297 struct bfd_hash_entry *entry;
298 struct bfd_hash_table *table;
299 const char *string;
300 {
301 struct bfd_hash_entry *ret = entry;
302
303 /* Allocate the structure if it has not already been allocated by a
304 subclass. */
305 if (ret == NULL)
306 ret = bfd_hash_allocate (table,
307 sizeof (struct elf_m68k_link_hash_entry));
308 if (ret == NULL)
309 return ret;
310
311 /* Call the allocation method of the superclass. */
312 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
313 if (ret != NULL)
314 elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL;
315
316 return ret;
317 }
318
319 /* Create an m68k ELF linker hash table. */
320
321 static struct bfd_link_hash_table *
322 elf_m68k_link_hash_table_create (abfd)
323 bfd *abfd;
324 {
325 struct elf_m68k_link_hash_table *ret;
326 bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table);
327
328 ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt);
329 if (ret == (struct elf_m68k_link_hash_table *) NULL)
330 return NULL;
331
332 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
333 elf_m68k_link_hash_newfunc))
334 {
335 free (ret);
336 return NULL;
337 }
338
339 ret->sym_sec.abfd = NULL;
340
341 return &ret->root.root;
342 }
343
344 /* Keep m68k-specific flags in the ELF header. */
345 static bfd_boolean
346 elf32_m68k_set_private_flags (abfd, flags)
347 bfd *abfd;
348 flagword flags;
349 {
350 elf_elfheader (abfd)->e_flags = flags;
351 elf_flags_init (abfd) = TRUE;
352 return TRUE;
353 }
354
355 /* Merge backend specific data from an object file to the output
356 object file when linking. */
357 static bfd_boolean
358 elf32_m68k_merge_private_bfd_data (ibfd, obfd)
359 bfd *ibfd;
360 bfd *obfd;
361 {
362 flagword out_flags;
363 flagword in_flags;
364
365 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
366 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
367 return TRUE;
368
369 in_flags = elf_elfheader (ibfd)->e_flags;
370 out_flags = elf_elfheader (obfd)->e_flags;
371
372 if (!elf_flags_init (obfd))
373 {
374 elf_flags_init (obfd) = TRUE;
375 elf_elfheader (obfd)->e_flags = in_flags;
376 }
377
378 return TRUE;
379 }
380
381 /* Display the flags field. */
382 static bfd_boolean
383 elf32_m68k_print_private_bfd_data (abfd, ptr)
384 bfd *abfd;
385 PTR ptr;
386 {
387 FILE *file = (FILE *) ptr;
388
389 BFD_ASSERT (abfd != NULL && ptr != NULL);
390
391 /* Print normal ELF private data. */
392 _bfd_elf_print_private_bfd_data (abfd, ptr);
393
394 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
395
396 /* xgettext:c-format */
397 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
398
399 if (elf_elfheader (abfd)->e_flags & EF_CPU32)
400 fprintf (file, _(" [cpu32]"));
401
402 if (elf_elfheader (abfd)->e_flags & EF_M68000)
403 fprintf (file, _(" [m68000]"));
404
405 fputc ('\n', file);
406
407 return TRUE;
408 }
409 /* Look through the relocs for a section during the first phase, and
410 allocate space in the global offset table or procedure linkage
411 table. */
412
413 static bfd_boolean
414 elf_m68k_check_relocs (abfd, info, sec, relocs)
415 bfd *abfd;
416 struct bfd_link_info *info;
417 asection *sec;
418 const Elf_Internal_Rela *relocs;
419 {
420 bfd *dynobj;
421 Elf_Internal_Shdr *symtab_hdr;
422 struct elf_link_hash_entry **sym_hashes;
423 bfd_signed_vma *local_got_refcounts;
424 const Elf_Internal_Rela *rel;
425 const Elf_Internal_Rela *rel_end;
426 asection *sgot;
427 asection *srelgot;
428 asection *sreloc;
429
430 if (info->relocatable)
431 return TRUE;
432
433 dynobj = elf_hash_table (info)->dynobj;
434 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
435 sym_hashes = elf_sym_hashes (abfd);
436 local_got_refcounts = elf_local_got_refcounts (abfd);
437
438 sgot = NULL;
439 srelgot = NULL;
440 sreloc = NULL;
441
442 rel_end = relocs + sec->reloc_count;
443 for (rel = relocs; rel < rel_end; rel++)
444 {
445 unsigned long r_symndx;
446 struct elf_link_hash_entry *h;
447
448 r_symndx = ELF32_R_SYM (rel->r_info);
449
450 if (r_symndx < symtab_hdr->sh_info)
451 h = NULL;
452 else
453 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
454
455 switch (ELF32_R_TYPE (rel->r_info))
456 {
457 case R_68K_GOT8:
458 case R_68K_GOT16:
459 case R_68K_GOT32:
460 if (h != NULL
461 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
462 break;
463 /* Fall through. */
464 case R_68K_GOT8O:
465 case R_68K_GOT16O:
466 case R_68K_GOT32O:
467 /* This symbol requires a global offset table entry. */
468
469 if (dynobj == NULL)
470 {
471 /* Create the .got section. */
472 elf_hash_table (info)->dynobj = dynobj = abfd;
473 if (!_bfd_elf_create_got_section (dynobj, info))
474 return FALSE;
475 }
476
477 if (sgot == NULL)
478 {
479 sgot = bfd_get_section_by_name (dynobj, ".got");
480 BFD_ASSERT (sgot != NULL);
481 }
482
483 if (srelgot == NULL
484 && (h != NULL || info->shared))
485 {
486 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
487 if (srelgot == NULL)
488 {
489 srelgot = bfd_make_section (dynobj, ".rela.got");
490 if (srelgot == NULL
491 || !bfd_set_section_flags (dynobj, srelgot,
492 (SEC_ALLOC
493 | SEC_LOAD
494 | SEC_HAS_CONTENTS
495 | SEC_IN_MEMORY
496 | SEC_LINKER_CREATED
497 | SEC_READONLY))
498 || !bfd_set_section_alignment (dynobj, srelgot, 2))
499 return FALSE;
500 }
501 }
502
503 if (h != NULL)
504 {
505 if (h->got.refcount == 0)
506 {
507 /* Make sure this symbol is output as a dynamic symbol. */
508 if (h->dynindx == -1
509 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
510 {
511 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
512 return FALSE;
513 }
514
515 /* Allocate space in the .got section. */
516 sgot->_raw_size += 4;
517 /* Allocate relocation space. */
518 srelgot->_raw_size += sizeof (Elf32_External_Rela);
519 }
520 h->got.refcount++;
521 }
522 else
523 {
524 /* This is a global offset table entry for a local symbol. */
525 if (local_got_refcounts == NULL)
526 {
527 bfd_size_type size;
528
529 size = symtab_hdr->sh_info;
530 size *= sizeof (bfd_signed_vma);
531 local_got_refcounts = ((bfd_signed_vma *)
532 bfd_zalloc (abfd, size));
533 if (local_got_refcounts == NULL)
534 return FALSE;
535 elf_local_got_refcounts (abfd) = local_got_refcounts;
536 }
537 if (local_got_refcounts[r_symndx] == 0)
538 {
539 sgot->_raw_size += 4;
540 if (info->shared)
541 {
542 /* If we are generating a shared object, we need to
543 output a R_68K_RELATIVE reloc so that the dynamic
544 linker can adjust this GOT entry. */
545 srelgot->_raw_size += sizeof (Elf32_External_Rela);
546 }
547 }
548 local_got_refcounts[r_symndx]++;
549 }
550 break;
551
552 case R_68K_PLT8:
553 case R_68K_PLT16:
554 case R_68K_PLT32:
555 /* This symbol requires a procedure linkage table entry. We
556 actually build the entry in adjust_dynamic_symbol,
557 because this might be a case of linking PIC code which is
558 never referenced by a dynamic object, in which case we
559 don't need to generate a procedure linkage table entry
560 after all. */
561
562 /* If this is a local symbol, we resolve it directly without
563 creating a procedure linkage table entry. */
564 if (h == NULL)
565 continue;
566
567 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
568 h->plt.refcount++;
569 break;
570
571 case R_68K_PLT8O:
572 case R_68K_PLT16O:
573 case R_68K_PLT32O:
574 /* This symbol requires a procedure linkage table entry. */
575
576 if (h == NULL)
577 {
578 /* It does not make sense to have this relocation for a
579 local symbol. FIXME: does it? How to handle it if
580 it does make sense? */
581 bfd_set_error (bfd_error_bad_value);
582 return FALSE;
583 }
584
585 /* Make sure this symbol is output as a dynamic symbol. */
586 if (h->dynindx == -1
587 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
588 {
589 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
590 return FALSE;
591 }
592
593 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
594 h->plt.refcount++;
595 break;
596
597 case R_68K_PC8:
598 case R_68K_PC16:
599 case R_68K_PC32:
600 /* If we are creating a shared library and this is not a local
601 symbol, we need to copy the reloc into the shared library.
602 However when linking with -Bsymbolic and this is a global
603 symbol which is defined in an object we are including in the
604 link (i.e., DEF_REGULAR is set), then we can resolve the
605 reloc directly. At this point we have not seen all the input
606 files, so it is possible that DEF_REGULAR is not set now but
607 will be set later (it is never cleared). We account for that
608 possibility below by storing information in the
609 pcrel_relocs_copied field of the hash table entry. */
610 if (!(info->shared
611 && (sec->flags & SEC_ALLOC) != 0
612 && h != NULL
613 && (!info->symbolic
614 || h->root.type == bfd_link_hash_defweak
615 || (h->elf_link_hash_flags
616 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
617 {
618 if (h != NULL)
619 {
620 /* Make sure a plt entry is created for this symbol if
621 it turns out to be a function defined by a dynamic
622 object. */
623 h->plt.refcount++;
624 }
625 break;
626 }
627 /* Fall through. */
628 case R_68K_8:
629 case R_68K_16:
630 case R_68K_32:
631 if (h != NULL)
632 {
633 /* Make sure a plt entry is created for this symbol if it
634 turns out to be a function defined by a dynamic object. */
635 h->plt.refcount++;
636 }
637
638 /* If we are creating a shared library, we need to copy the
639 reloc into the shared library. */
640 if (info->shared
641 && (sec->flags & SEC_ALLOC) != 0)
642 {
643 /* When creating a shared object, we must copy these
644 reloc types into the output file. We create a reloc
645 section in dynobj and make room for this reloc. */
646 if (sreloc == NULL)
647 {
648 const char *name;
649
650 name = (bfd_elf_string_from_elf_section
651 (abfd,
652 elf_elfheader (abfd)->e_shstrndx,
653 elf_section_data (sec)->rel_hdr.sh_name));
654 if (name == NULL)
655 return FALSE;
656
657 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
658 && strcmp (bfd_get_section_name (abfd, sec),
659 name + 5) == 0);
660
661 sreloc = bfd_get_section_by_name (dynobj, name);
662 if (sreloc == NULL)
663 {
664 sreloc = bfd_make_section (dynobj, name);
665 if (sreloc == NULL
666 || !bfd_set_section_flags (dynobj, sreloc,
667 (SEC_ALLOC
668 | SEC_LOAD
669 | SEC_HAS_CONTENTS
670 | SEC_IN_MEMORY
671 | SEC_LINKER_CREATED
672 | SEC_READONLY))
673 || !bfd_set_section_alignment (dynobj, sreloc, 2))
674 return FALSE;
675 }
676 elf_section_data (sec)->sreloc = sreloc;
677 }
678
679 if (sec->flags & SEC_READONLY
680 /* Don't set DF_TEXTREL yet for PC relative
681 relocations, they might be discarded later. */
682 && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8
683 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
684 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32))
685 info->flags |= DF_TEXTREL;
686
687 sreloc->_raw_size += sizeof (Elf32_External_Rela);
688
689 /* We count the number of PC relative relocations we have
690 entered for this symbol, so that we can discard them
691 again if, in the -Bsymbolic case, the symbol is later
692 defined by a regular object, or, in the normal shared
693 case, the symbol is forced to be local. Note that this
694 function is only called if we are using an m68kelf linker
695 hash table, which means that h is really a pointer to an
696 elf_m68k_link_hash_entry. */
697 if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8
698 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
699 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
700 {
701 struct elf_m68k_pcrel_relocs_copied *p;
702 struct elf_m68k_pcrel_relocs_copied **head;
703
704 if (h != NULL)
705 {
706 struct elf_m68k_link_hash_entry *eh
707 = elf_m68k_hash_entry (h);
708 head = &eh->pcrel_relocs_copied;
709 }
710 else
711 {
712 asection *s;
713 s = (bfd_section_from_r_symndx
714 (abfd, &elf_m68k_hash_table (info)->sym_sec,
715 sec, r_symndx));
716 if (s == NULL)
717 return FALSE;
718
719 head = ((struct elf_m68k_pcrel_relocs_copied **)
720 &elf_section_data (s)->local_dynrel);
721 }
722
723 for (p = *head; p != NULL; p = p->next)
724 if (p->section == sreloc)
725 break;
726
727 if (p == NULL)
728 {
729 p = ((struct elf_m68k_pcrel_relocs_copied *)
730 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
731 if (p == NULL)
732 return FALSE;
733 p->next = *head;
734 *head = p;
735 p->section = sreloc;
736 p->count = 0;
737 }
738
739 ++p->count;
740 }
741 }
742
743 break;
744
745 /* This relocation describes the C++ object vtable hierarchy.
746 Reconstruct it for later use during GC. */
747 case R_68K_GNU_VTINHERIT:
748 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
749 return FALSE;
750 break;
751
752 /* This relocation describes which C++ vtable entries are actually
753 used. Record for later use during GC. */
754 case R_68K_GNU_VTENTRY:
755 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
756 return FALSE;
757 break;
758
759 default:
760 break;
761 }
762 }
763
764 return TRUE;
765 }
766
767 /* Return the section that should be marked against GC for a given
768 relocation. */
769
770 static asection *
771 elf_m68k_gc_mark_hook (sec, info, rel, h, sym)
772 asection *sec;
773 struct bfd_link_info *info ATTRIBUTE_UNUSED;
774 Elf_Internal_Rela *rel;
775 struct elf_link_hash_entry *h;
776 Elf_Internal_Sym *sym;
777 {
778 if (h != NULL)
779 {
780 switch (ELF32_R_TYPE (rel->r_info))
781 {
782 case R_68K_GNU_VTINHERIT:
783 case R_68K_GNU_VTENTRY:
784 break;
785
786 default:
787 switch (h->root.type)
788 {
789 default:
790 break;
791
792 case bfd_link_hash_defined:
793 case bfd_link_hash_defweak:
794 return h->root.u.def.section;
795
796 case bfd_link_hash_common:
797 return h->root.u.c.p->section;
798 }
799 }
800 }
801 else
802 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
803
804 return NULL;
805 }
806
807 /* Update the got entry reference counts for the section being removed. */
808
809 static bfd_boolean
810 elf_m68k_gc_sweep_hook (abfd, info, sec, relocs)
811 bfd *abfd;
812 struct bfd_link_info *info;
813 asection *sec;
814 const Elf_Internal_Rela *relocs;
815 {
816 Elf_Internal_Shdr *symtab_hdr;
817 struct elf_link_hash_entry **sym_hashes;
818 bfd_signed_vma *local_got_refcounts;
819 const Elf_Internal_Rela *rel, *relend;
820 bfd *dynobj;
821 asection *sgot;
822 asection *srelgot;
823
824 dynobj = elf_hash_table (info)->dynobj;
825 if (dynobj == NULL)
826 return TRUE;
827
828 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
829 sym_hashes = elf_sym_hashes (abfd);
830 local_got_refcounts = elf_local_got_refcounts (abfd);
831
832 sgot = bfd_get_section_by_name (dynobj, ".got");
833 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
834
835 relend = relocs + sec->reloc_count;
836 for (rel = relocs; rel < relend; rel++)
837 {
838 unsigned long r_symndx;
839 struct elf_link_hash_entry *h;
840
841 switch (ELF32_R_TYPE (rel->r_info))
842 {
843 case R_68K_GOT8:
844 case R_68K_GOT16:
845 case R_68K_GOT32:
846 case R_68K_GOT8O:
847 case R_68K_GOT16O:
848 case R_68K_GOT32O:
849 r_symndx = ELF32_R_SYM (rel->r_info);
850 if (r_symndx >= symtab_hdr->sh_info)
851 {
852 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
853 if (h->got.refcount > 0)
854 {
855 --h->got.refcount;
856 if (h->got.refcount == 0)
857 {
858 /* We don't need the .got entry any more. */
859 sgot->_raw_size -= 4;
860 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
861 }
862 }
863 }
864 else if (local_got_refcounts != NULL)
865 {
866 if (local_got_refcounts[r_symndx] > 0)
867 {
868 --local_got_refcounts[r_symndx];
869 if (local_got_refcounts[r_symndx] == 0)
870 {
871 /* We don't need the .got entry any more. */
872 sgot->_raw_size -= 4;
873 if (info->shared)
874 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
875 }
876 }
877 }
878 break;
879
880 case R_68K_PLT8:
881 case R_68K_PLT16:
882 case R_68K_PLT32:
883 case R_68K_PLT8O:
884 case R_68K_PLT16O:
885 case R_68K_PLT32O:
886 case R_68K_PC8:
887 case R_68K_PC16:
888 case R_68K_PC32:
889 case R_68K_8:
890 case R_68K_16:
891 case R_68K_32:
892 r_symndx = ELF32_R_SYM (rel->r_info);
893 if (r_symndx >= symtab_hdr->sh_info)
894 {
895 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
896 if (h->plt.refcount > 0)
897 --h->plt.refcount;
898 }
899 break;
900
901 default:
902 break;
903 }
904 }
905
906 return TRUE;
907 }
908
909 /* Adjust a symbol defined by a dynamic object and referenced by a
910 regular object. The current definition is in some section of the
911 dynamic object, but we're not including those sections. We have to
912 change the definition to something the rest of the link can
913 understand. */
914
915 static bfd_boolean
916 elf_m68k_adjust_dynamic_symbol (info, h)
917 struct bfd_link_info *info;
918 struct elf_link_hash_entry *h;
919 {
920 bfd *dynobj;
921 asection *s;
922 unsigned int power_of_two;
923
924 dynobj = elf_hash_table (info)->dynobj;
925
926 /* Make sure we know what is going on here. */
927 BFD_ASSERT (dynobj != NULL
928 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
929 || h->weakdef != NULL
930 || ((h->elf_link_hash_flags
931 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
932 && (h->elf_link_hash_flags
933 & ELF_LINK_HASH_REF_REGULAR) != 0
934 && (h->elf_link_hash_flags
935 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
936
937 /* If this is a function, put it in the procedure linkage table. We
938 will fill in the contents of the procedure linkage table later,
939 when we know the address of the .got section. */
940 if (h->type == STT_FUNC
941 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
942 {
943 if (! info->shared
944 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
945 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
946 /* We must always create the plt entry if it was referenced
947 by a PLTxxO relocation. In this case we already recorded
948 it as a dynamic symbol. */
949 && h->dynindx == -1)
950 {
951 /* This case can occur if we saw a PLTxx reloc in an input
952 file, but the symbol was never referred to by a dynamic
953 object. In such a case, we don't actually need to build
954 a procedure linkage table, and we can just do a PCxx
955 reloc instead. */
956 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
957 h->plt.offset = (bfd_vma) -1;
958 return TRUE;
959 }
960
961 /* GC may have rendered this entry unused. */
962 if (h->plt.refcount <= 0)
963 {
964 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
965 h->plt.offset = (bfd_vma) -1;
966 return TRUE;
967 }
968
969 /* Make sure this symbol is output as a dynamic symbol. */
970 if (h->dynindx == -1
971 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
972 {
973 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
974 return FALSE;
975 }
976
977 s = bfd_get_section_by_name (dynobj, ".plt");
978 BFD_ASSERT (s != NULL);
979
980 /* If this is the first .plt entry, make room for the special
981 first entry. */
982 if (s->_raw_size == 0)
983 {
984 if (CPU32_FLAG (dynobj))
985 s->_raw_size += PLT_CPU32_ENTRY_SIZE;
986 else
987 s->_raw_size += PLT_ENTRY_SIZE;
988 }
989
990 /* If this symbol is not defined in a regular file, and we are
991 not generating a shared library, then set the symbol to this
992 location in the .plt. This is required to make function
993 pointers compare as equal between the normal executable and
994 the shared library. */
995 if (!info->shared
996 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
997 {
998 h->root.u.def.section = s;
999 h->root.u.def.value = s->_raw_size;
1000 }
1001
1002 h->plt.offset = s->_raw_size;
1003
1004 /* Make room for this entry. */
1005 if (CPU32_FLAG (dynobj))
1006 s->_raw_size += PLT_CPU32_ENTRY_SIZE;
1007 else
1008 s->_raw_size += PLT_ENTRY_SIZE;
1009
1010 /* We also need to make an entry in the .got.plt section, which
1011 will be placed in the .got section by the linker script. */
1012 s = bfd_get_section_by_name (dynobj, ".got.plt");
1013 BFD_ASSERT (s != NULL);
1014 s->_raw_size += 4;
1015
1016 /* We also need to make an entry in the .rela.plt section. */
1017 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1018 BFD_ASSERT (s != NULL);
1019 s->_raw_size += sizeof (Elf32_External_Rela);
1020
1021 return TRUE;
1022 }
1023
1024 /* Reinitialize the plt offset now that it is not used as a reference
1025 count any more. */
1026 h->plt.offset = (bfd_vma) -1;
1027
1028 /* If this is a weak symbol, and there is a real definition, the
1029 processor independent code will have arranged for us to see the
1030 real definition first, and we can just use the same value. */
1031 if (h->weakdef != NULL)
1032 {
1033 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1034 || h->weakdef->root.type == bfd_link_hash_defweak);
1035 h->root.u.def.section = h->weakdef->root.u.def.section;
1036 h->root.u.def.value = h->weakdef->root.u.def.value;
1037 return TRUE;
1038 }
1039
1040 /* This is a reference to a symbol defined by a dynamic object which
1041 is not a function. */
1042
1043 /* If we are creating a shared library, we must presume that the
1044 only references to the symbol are via the global offset table.
1045 For such cases we need not do anything here; the relocations will
1046 be handled correctly by relocate_section. */
1047 if (info->shared)
1048 return TRUE;
1049
1050 /* We must allocate the symbol in our .dynbss section, which will
1051 become part of the .bss section of the executable. There will be
1052 an entry for this symbol in the .dynsym section. The dynamic
1053 object will contain position independent code, so all references
1054 from the dynamic object to this symbol will go through the global
1055 offset table. The dynamic linker will use the .dynsym entry to
1056 determine the address it must put in the global offset table, so
1057 both the dynamic object and the regular object will refer to the
1058 same memory location for the variable. */
1059
1060 s = bfd_get_section_by_name (dynobj, ".dynbss");
1061 BFD_ASSERT (s != NULL);
1062
1063 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
1064 copy the initial value out of the dynamic object and into the
1065 runtime process image. We need to remember the offset into the
1066 .rela.bss section we are going to use. */
1067 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1068 {
1069 asection *srel;
1070
1071 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1072 BFD_ASSERT (srel != NULL);
1073 srel->_raw_size += sizeof (Elf32_External_Rela);
1074 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1075 }
1076
1077 /* We need to figure out the alignment required for this symbol. I
1078 have no idea how ELF linkers handle this. */
1079 power_of_two = bfd_log2 (h->size);
1080 if (power_of_two > 3)
1081 power_of_two = 3;
1082
1083 /* Apply the required alignment. */
1084 s->_raw_size = BFD_ALIGN (s->_raw_size,
1085 (bfd_size_type) (1 << power_of_two));
1086 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1087 {
1088 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1089 return FALSE;
1090 }
1091
1092 /* Define the symbol as being at this point in the section. */
1093 h->root.u.def.section = s;
1094 h->root.u.def.value = s->_raw_size;
1095
1096 /* Increment the section size to make room for the symbol. */
1097 s->_raw_size += h->size;
1098
1099 return TRUE;
1100 }
1101
1102 /* This is the condition under which elf_m68k_finish_dynamic_symbol
1103 will be called from elflink.h. If elflink.h doesn't call our
1104 finish_dynamic_symbol routine, we'll need to do something about
1105 initializing any .plt and .got entries in elf_m68k_relocate_section. */
1106 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1107 ((DYN) \
1108 && ((SHARED) \
1109 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1110 && ((H)->dynindx != -1 \
1111 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1112
1113 /* Set the sizes of the dynamic sections. */
1114
1115 static bfd_boolean
1116 elf_m68k_size_dynamic_sections (output_bfd, info)
1117 bfd *output_bfd ATTRIBUTE_UNUSED;
1118 struct bfd_link_info *info;
1119 {
1120 bfd *dynobj;
1121 asection *s;
1122 bfd_boolean plt;
1123 bfd_boolean relocs;
1124
1125 dynobj = elf_hash_table (info)->dynobj;
1126 BFD_ASSERT (dynobj != NULL);
1127
1128 if (elf_hash_table (info)->dynamic_sections_created)
1129 {
1130 /* Set the contents of the .interp section to the interpreter. */
1131 if (info->executable)
1132 {
1133 s = bfd_get_section_by_name (dynobj, ".interp");
1134 BFD_ASSERT (s != NULL);
1135 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1136 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1137 }
1138 }
1139 else
1140 {
1141 /* We may have created entries in the .rela.got section.
1142 However, if we are not creating the dynamic sections, we will
1143 not actually use these entries. Reset the size of .rela.got,
1144 which will cause it to get stripped from the output file
1145 below. */
1146 s = bfd_get_section_by_name (dynobj, ".rela.got");
1147 if (s != NULL)
1148 s->_raw_size = 0;
1149 }
1150
1151 /* If this is a -Bsymbolic shared link, then we need to discard all
1152 PC relative relocs against symbols defined in a regular object.
1153 For the normal shared case we discard the PC relative relocs
1154 against symbols that have become local due to visibility changes.
1155 We allocated space for them in the check_relocs routine, but we
1156 will not fill them in in the relocate_section routine. */
1157 if (info->shared)
1158 elf_link_hash_traverse (elf_hash_table (info),
1159 elf_m68k_discard_copies,
1160 (PTR) info);
1161
1162 /* The check_relocs and adjust_dynamic_symbol entry points have
1163 determined the sizes of the various dynamic sections. Allocate
1164 memory for them. */
1165 plt = FALSE;
1166 relocs = FALSE;
1167 for (s = dynobj->sections; s != NULL; s = s->next)
1168 {
1169 const char *name;
1170 bfd_boolean strip;
1171
1172 if ((s->flags & SEC_LINKER_CREATED) == 0)
1173 continue;
1174
1175 /* It's OK to base decisions on the section name, because none
1176 of the dynobj section names depend upon the input files. */
1177 name = bfd_get_section_name (dynobj, s);
1178
1179 strip = FALSE;
1180
1181 if (strcmp (name, ".plt") == 0)
1182 {
1183 if (s->_raw_size == 0)
1184 {
1185 /* Strip this section if we don't need it; see the
1186 comment below. */
1187 strip = TRUE;
1188 }
1189 else
1190 {
1191 /* Remember whether there is a PLT. */
1192 plt = TRUE;
1193 }
1194 }
1195 else if (strncmp (name, ".rela", 5) == 0)
1196 {
1197 if (s->_raw_size == 0)
1198 {
1199 /* If we don't need this section, strip it from the
1200 output file. This is mostly to handle .rela.bss and
1201 .rela.plt. We must create both sections in
1202 create_dynamic_sections, because they must be created
1203 before the linker maps input sections to output
1204 sections. The linker does that before
1205 adjust_dynamic_symbol is called, and it is that
1206 function which decides whether anything needs to go
1207 into these sections. */
1208 strip = TRUE;
1209 }
1210 else
1211 {
1212 relocs = TRUE;
1213
1214 /* We use the reloc_count field as a counter if we need
1215 to copy relocs into the output file. */
1216 s->reloc_count = 0;
1217 }
1218 }
1219 else if (strncmp (name, ".got", 4) != 0)
1220 {
1221 /* It's not one of our sections, so don't allocate space. */
1222 continue;
1223 }
1224
1225 if (strip)
1226 {
1227 _bfd_strip_section_from_output (info, s);
1228 continue;
1229 }
1230
1231 /* Allocate memory for the section contents. */
1232 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
1233 Unused entries should be reclaimed before the section's contents
1234 are written out, but at the moment this does not happen. Thus in
1235 order to prevent writing out garbage, we initialise the section's
1236 contents to zero. */
1237 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1238 if (s->contents == NULL && s->_raw_size != 0)
1239 return FALSE;
1240 }
1241
1242 if (elf_hash_table (info)->dynamic_sections_created)
1243 {
1244 /* Add some entries to the .dynamic section. We fill in the
1245 values later, in elf_m68k_finish_dynamic_sections, but we
1246 must add the entries now so that we get the correct size for
1247 the .dynamic section. The DT_DEBUG entry is filled in by the
1248 dynamic linker and used by the debugger. */
1249 #define add_dynamic_entry(TAG, VAL) \
1250 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1251
1252 if (!info->shared)
1253 {
1254 if (!add_dynamic_entry (DT_DEBUG, 0))
1255 return FALSE;
1256 }
1257
1258 if (plt)
1259 {
1260 if (!add_dynamic_entry (DT_PLTGOT, 0)
1261 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1262 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1263 || !add_dynamic_entry (DT_JMPREL, 0))
1264 return FALSE;
1265 }
1266
1267 if (relocs)
1268 {
1269 if (!add_dynamic_entry (DT_RELA, 0)
1270 || !add_dynamic_entry (DT_RELASZ, 0)
1271 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1272 return FALSE;
1273 }
1274
1275 if ((info->flags & DF_TEXTREL) != 0)
1276 {
1277 if (!add_dynamic_entry (DT_TEXTREL, 0))
1278 return FALSE;
1279 }
1280 }
1281 #undef add_dynamic_entry
1282
1283 return TRUE;
1284 }
1285
1286 /* This function is called via elf_link_hash_traverse if we are
1287 creating a shared object. In the -Bsymbolic case it discards the
1288 space allocated to copy PC relative relocs against symbols which
1289 are defined in regular objects. For the normal shared case, it
1290 discards space for pc-relative relocs that have become local due to
1291 symbol visibility changes. We allocated space for them in the
1292 check_relocs routine, but we won't fill them in in the
1293 relocate_section routine.
1294
1295 We also check whether any of the remaining relocations apply
1296 against a readonly section, and set the DF_TEXTREL flag in this
1297 case. */
1298
1299 static bfd_boolean
1300 elf_m68k_discard_copies (h, inf)
1301 struct elf_link_hash_entry *h;
1302 PTR inf;
1303 {
1304 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1305 struct elf_m68k_pcrel_relocs_copied *s;
1306
1307 if (h->root.type == bfd_link_hash_warning)
1308 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1309
1310 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1311 || (!info->symbolic
1312 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0))
1313 {
1314 if ((info->flags & DF_TEXTREL) == 0)
1315 {
1316 /* Look for relocations against read-only sections. */
1317 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
1318 s != NULL;
1319 s = s->next)
1320 if ((s->section->flags & SEC_READONLY) != 0)
1321 {
1322 info->flags |= DF_TEXTREL;
1323 break;
1324 }
1325 }
1326
1327 return TRUE;
1328 }
1329
1330 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
1331 s != NULL;
1332 s = s->next)
1333 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
1334
1335 return TRUE;
1336 }
1337
1338 /* Relocate an M68K ELF section. */
1339
1340 static bfd_boolean
1341 elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
1342 contents, relocs, local_syms, local_sections)
1343 bfd *output_bfd;
1344 struct bfd_link_info *info;
1345 bfd *input_bfd;
1346 asection *input_section;
1347 bfd_byte *contents;
1348 Elf_Internal_Rela *relocs;
1349 Elf_Internal_Sym *local_syms;
1350 asection **local_sections;
1351 {
1352 bfd *dynobj;
1353 Elf_Internal_Shdr *symtab_hdr;
1354 struct elf_link_hash_entry **sym_hashes;
1355 bfd_vma *local_got_offsets;
1356 asection *sgot;
1357 asection *splt;
1358 asection *sreloc;
1359 Elf_Internal_Rela *rel;
1360 Elf_Internal_Rela *relend;
1361
1362 if (info->relocatable)
1363 return TRUE;
1364
1365 dynobj = elf_hash_table (info)->dynobj;
1366 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1367 sym_hashes = elf_sym_hashes (input_bfd);
1368 local_got_offsets = elf_local_got_offsets (input_bfd);
1369
1370 sgot = NULL;
1371 splt = NULL;
1372 sreloc = NULL;
1373
1374 rel = relocs;
1375 relend = relocs + input_section->reloc_count;
1376 for (; rel < relend; rel++)
1377 {
1378 int r_type;
1379 reloc_howto_type *howto;
1380 unsigned long r_symndx;
1381 struct elf_link_hash_entry *h;
1382 Elf_Internal_Sym *sym;
1383 asection *sec;
1384 bfd_vma relocation;
1385 bfd_boolean unresolved_reloc;
1386 bfd_reloc_status_type r;
1387
1388 r_type = ELF32_R_TYPE (rel->r_info);
1389 if (r_type < 0 || r_type >= (int) R_68K_max)
1390 {
1391 bfd_set_error (bfd_error_bad_value);
1392 return FALSE;
1393 }
1394 howto = howto_table + r_type;
1395
1396 r_symndx = ELF32_R_SYM (rel->r_info);
1397
1398 h = NULL;
1399 sym = NULL;
1400 sec = NULL;
1401 unresolved_reloc = FALSE;
1402
1403 if (r_symndx < symtab_hdr->sh_info)
1404 {
1405 sym = local_syms + r_symndx;
1406 sec = local_sections[r_symndx];
1407 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1408 }
1409 else
1410 {
1411 bfd_boolean warned;
1412
1413 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1414 r_symndx, symtab_hdr, sym_hashes,
1415 h, sec, relocation,
1416 unresolved_reloc, warned);
1417 }
1418
1419 switch (r_type)
1420 {
1421 case R_68K_GOT8:
1422 case R_68K_GOT16:
1423 case R_68K_GOT32:
1424 /* Relocation is to the address of the entry for this symbol
1425 in the global offset table. */
1426 if (h != NULL
1427 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1428 break;
1429 /* Fall through. */
1430 case R_68K_GOT8O:
1431 case R_68K_GOT16O:
1432 case R_68K_GOT32O:
1433 /* Relocation is the offset of the entry for this symbol in
1434 the global offset table. */
1435
1436 {
1437 bfd_vma off;
1438
1439 if (sgot == NULL)
1440 {
1441 sgot = bfd_get_section_by_name (dynobj, ".got");
1442 BFD_ASSERT (sgot != NULL);
1443 }
1444
1445 if (h != NULL)
1446 {
1447 bfd_boolean dyn;
1448
1449 off = h->got.offset;
1450 BFD_ASSERT (off != (bfd_vma) -1);
1451
1452 dyn = elf_hash_table (info)->dynamic_sections_created;
1453 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1454 || (info->shared
1455 && (info->symbolic
1456 || h->dynindx == -1
1457 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
1458 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) != 0)
1459 {
1460 /* This is actually a static link, or it is a
1461 -Bsymbolic link and the symbol is defined
1462 locally, or the symbol was forced to be local
1463 because of a version file.. We must initialize
1464 this entry in the global offset table. Since
1465 the offset must always be a multiple of 4, we
1466 use the least significant bit to record whether
1467 we have initialized it already.
1468
1469 When doing a dynamic link, we create a .rela.got
1470 relocation entry to initialize the value. This
1471 is done in the finish_dynamic_symbol routine. */
1472 if ((off & 1) != 0)
1473 off &= ~1;
1474 else
1475 {
1476 bfd_put_32 (output_bfd, relocation,
1477 sgot->contents + off);
1478 h->got.offset |= 1;
1479 }
1480 }
1481 else
1482 unresolved_reloc = FALSE;
1483 }
1484 else
1485 {
1486 BFD_ASSERT (local_got_offsets != NULL
1487 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1488
1489 off = local_got_offsets[r_symndx];
1490
1491 /* The offset must always be a multiple of 4. We use
1492 the least significant bit to record whether we have
1493 already generated the necessary reloc. */
1494 if ((off & 1) != 0)
1495 off &= ~1;
1496 else
1497 {
1498 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1499
1500 if (info->shared)
1501 {
1502 asection *s;
1503 Elf_Internal_Rela outrel;
1504 bfd_byte *loc;
1505
1506 s = bfd_get_section_by_name (dynobj, ".rela.got");
1507 BFD_ASSERT (s != NULL);
1508
1509 outrel.r_offset = (sgot->output_section->vma
1510 + sgot->output_offset
1511 + off);
1512 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
1513 outrel.r_addend = relocation;
1514 loc = s->contents;
1515 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1516 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1517 }
1518
1519 local_got_offsets[r_symndx] |= 1;
1520 }
1521 }
1522
1523 relocation = sgot->output_offset + off;
1524 if (r_type == R_68K_GOT8O
1525 || r_type == R_68K_GOT16O
1526 || r_type == R_68K_GOT32O)
1527 {
1528 /* This relocation does not use the addend. */
1529 rel->r_addend = 0;
1530 }
1531 else
1532 relocation += sgot->output_section->vma;
1533 }
1534 break;
1535
1536 case R_68K_PLT8:
1537 case R_68K_PLT16:
1538 case R_68K_PLT32:
1539 /* Relocation is to the entry for this symbol in the
1540 procedure linkage table. */
1541
1542 /* Resolve a PLTxx reloc against a local symbol directly,
1543 without using the procedure linkage table. */
1544 if (h == NULL)
1545 break;
1546
1547 if (h->plt.offset == (bfd_vma) -1
1548 || !elf_hash_table (info)->dynamic_sections_created)
1549 {
1550 /* We didn't make a PLT entry for this symbol. This
1551 happens when statically linking PIC code, or when
1552 using -Bsymbolic. */
1553 break;
1554 }
1555
1556 if (splt == NULL)
1557 {
1558 splt = bfd_get_section_by_name (dynobj, ".plt");
1559 BFD_ASSERT (splt != NULL);
1560 }
1561
1562 relocation = (splt->output_section->vma
1563 + splt->output_offset
1564 + h->plt.offset);
1565 unresolved_reloc = FALSE;
1566 break;
1567
1568 case R_68K_PLT8O:
1569 case R_68K_PLT16O:
1570 case R_68K_PLT32O:
1571 /* Relocation is the offset of the entry for this symbol in
1572 the procedure linkage table. */
1573 BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
1574
1575 if (splt == NULL)
1576 {
1577 splt = bfd_get_section_by_name (dynobj, ".plt");
1578 BFD_ASSERT (splt != NULL);
1579 }
1580
1581 relocation = h->plt.offset;
1582 unresolved_reloc = FALSE;
1583
1584 /* This relocation does not use the addend. */
1585 rel->r_addend = 0;
1586
1587 break;
1588
1589 case R_68K_PC8:
1590 case R_68K_PC16:
1591 case R_68K_PC32:
1592 if (h == NULL
1593 || (info->shared
1594 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1595 break;
1596 /* Fall through. */
1597 case R_68K_8:
1598 case R_68K_16:
1599 case R_68K_32:
1600 if (info->shared
1601 && r_symndx != 0
1602 && (input_section->flags & SEC_ALLOC) != 0
1603 && (h == NULL
1604 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1605 || h->root.type != bfd_link_hash_undefweak)
1606 && ((r_type != R_68K_PC8
1607 && r_type != R_68K_PC16
1608 && r_type != R_68K_PC32)
1609 || (h != NULL
1610 && h->dynindx != -1
1611 && (!info->symbolic
1612 || (h->elf_link_hash_flags
1613 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1614 {
1615 Elf_Internal_Rela outrel;
1616 bfd_byte *loc;
1617 bfd_boolean skip, relocate;
1618
1619 /* When generating a shared object, these relocations
1620 are copied into the output file to be resolved at run
1621 time. */
1622
1623 skip = FALSE;
1624 relocate = FALSE;
1625
1626 outrel.r_offset =
1627 _bfd_elf_section_offset (output_bfd, info, input_section,
1628 rel->r_offset);
1629 if (outrel.r_offset == (bfd_vma) -1)
1630 skip = TRUE;
1631 else if (outrel.r_offset == (bfd_vma) -2)
1632 skip = TRUE, relocate = TRUE;
1633 outrel.r_offset += (input_section->output_section->vma
1634 + input_section->output_offset);
1635
1636 if (skip)
1637 memset (&outrel, 0, sizeof outrel);
1638 else if (h != NULL
1639 && h->dynindx != -1
1640 && (r_type == R_68K_PC8
1641 || r_type == R_68K_PC16
1642 || r_type == R_68K_PC32
1643 || !info->shared
1644 || !info->symbolic
1645 || (h->elf_link_hash_flags
1646 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1647 {
1648 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1649 outrel.r_addend = rel->r_addend;
1650 }
1651 else
1652 {
1653 /* This symbol is local, or marked to become local. */
1654 if (r_type == R_68K_32)
1655 {
1656 relocate = TRUE;
1657 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
1658 outrel.r_addend = relocation + rel->r_addend;
1659 }
1660 else
1661 {
1662 long indx;
1663
1664 if (bfd_is_abs_section (sec))
1665 indx = 0;
1666 else if (sec == NULL || sec->owner == NULL)
1667 {
1668 bfd_set_error (bfd_error_bad_value);
1669 return FALSE;
1670 }
1671 else
1672 {
1673 asection *osec;
1674
1675 osec = sec->output_section;
1676 indx = elf_section_data (osec)->dynindx;
1677 BFD_ASSERT (indx > 0);
1678 }
1679
1680 outrel.r_info = ELF32_R_INFO (indx, r_type);
1681 outrel.r_addend = relocation + rel->r_addend;
1682 }
1683 }
1684
1685 sreloc = elf_section_data (input_section)->sreloc;
1686 if (sreloc == NULL)
1687 abort ();
1688
1689 loc = sreloc->contents;
1690 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1691 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1692
1693 /* This reloc will be computed at runtime, so there's no
1694 need to do anything now, except for R_68K_32
1695 relocations that have been turned into
1696 R_68K_RELATIVE. */
1697 if (!relocate)
1698 continue;
1699 }
1700
1701 break;
1702
1703 case R_68K_GNU_VTINHERIT:
1704 case R_68K_GNU_VTENTRY:
1705 /* These are no-ops in the end. */
1706 continue;
1707
1708 default:
1709 break;
1710 }
1711
1712 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1713 because such sections are not SEC_ALLOC and thus ld.so will
1714 not process them. */
1715 if (unresolved_reloc
1716 && !((input_section->flags & SEC_DEBUGGING) != 0
1717 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1718 {
1719 (*_bfd_error_handler)
1720 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
1721 bfd_archive_filename (input_bfd),
1722 bfd_get_section_name (input_bfd, input_section),
1723 (long) rel->r_offset,
1724 h->root.root.string);
1725 return FALSE;
1726 }
1727
1728 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1729 contents, rel->r_offset,
1730 relocation, rel->r_addend);
1731
1732 if (r != bfd_reloc_ok)
1733 {
1734 const char *name;
1735
1736 if (h != NULL)
1737 name = h->root.root.string;
1738 else
1739 {
1740 name = bfd_elf_string_from_elf_section (input_bfd,
1741 symtab_hdr->sh_link,
1742 sym->st_name);
1743 if (name == NULL)
1744 return FALSE;
1745 if (*name == '\0')
1746 name = bfd_section_name (input_bfd, sec);
1747 }
1748
1749 if (r == bfd_reloc_overflow)
1750 {
1751 if (!(info->callbacks->reloc_overflow
1752 (info, name, howto->name, (bfd_vma) 0,
1753 input_bfd, input_section, rel->r_offset)))
1754 return FALSE;
1755 }
1756 else
1757 {
1758 (*_bfd_error_handler)
1759 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
1760 bfd_archive_filename (input_bfd),
1761 bfd_get_section_name (input_bfd, input_section),
1762 (long) rel->r_offset, name, (int) r);
1763 return FALSE;
1764 }
1765 }
1766 }
1767
1768 return TRUE;
1769 }
1770
1771 /* Finish up dynamic symbol handling. We set the contents of various
1772 dynamic sections here. */
1773
1774 static bfd_boolean
1775 elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
1776 bfd *output_bfd;
1777 struct bfd_link_info *info;
1778 struct elf_link_hash_entry *h;
1779 Elf_Internal_Sym *sym;
1780 {
1781 bfd *dynobj;
1782 int plt_off1, plt_off2, plt_off3;
1783
1784 dynobj = elf_hash_table (info)->dynobj;
1785
1786 if (h->plt.offset != (bfd_vma) -1)
1787 {
1788 asection *splt;
1789 asection *sgot;
1790 asection *srela;
1791 bfd_vma plt_index;
1792 bfd_vma got_offset;
1793 Elf_Internal_Rela rela;
1794 bfd_byte *loc;
1795
1796 /* This symbol has an entry in the procedure linkage table. Set
1797 it up. */
1798
1799 BFD_ASSERT (h->dynindx != -1);
1800
1801 splt = bfd_get_section_by_name (dynobj, ".plt");
1802 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1803 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1804 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1805
1806 /* Get the index in the procedure linkage table which
1807 corresponds to this symbol. This is the index of this symbol
1808 in all the symbols for which we are making plt entries. The
1809 first entry in the procedure linkage table is reserved. */
1810 if ( CPU32_FLAG (output_bfd))
1811 plt_index = h->plt.offset / PLT_CPU32_ENTRY_SIZE - 1;
1812 else
1813 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1814
1815 /* Get the offset into the .got table of the entry that
1816 corresponds to this function. Each .got entry is 4 bytes.
1817 The first three are reserved. */
1818 got_offset = (plt_index + 3) * 4;
1819
1820 if ( CPU32_FLAG (output_bfd))
1821 {
1822 /* Fill in the entry in the procedure linkage table. */
1823 memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry,
1824 PLT_CPU32_ENTRY_SIZE);
1825 plt_off1 = 4;
1826 plt_off2 = 12;
1827 plt_off3 = 18;
1828 }
1829 else
1830 {
1831 /* Fill in the entry in the procedure linkage table. */
1832 memcpy (splt->contents + h->plt.offset, elf_m68k_plt_entry,
1833 PLT_ENTRY_SIZE);
1834 plt_off1 = 4;
1835 plt_off2 = 10;
1836 plt_off3 = 16;
1837 }
1838
1839 /* The offset is relative to the first extension word. */
1840 bfd_put_32 (output_bfd,
1841 (sgot->output_section->vma
1842 + sgot->output_offset
1843 + got_offset
1844 - (splt->output_section->vma
1845 + h->plt.offset + 2)),
1846 splt->contents + h->plt.offset + plt_off1);
1847
1848 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1849 splt->contents + h->plt.offset + plt_off2);
1850 bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3),
1851 splt->contents + h->plt.offset + plt_off3);
1852
1853 /* Fill in the entry in the global offset table. */
1854 bfd_put_32 (output_bfd,
1855 (splt->output_section->vma
1856 + splt->output_offset
1857 + h->plt.offset
1858 + 8),
1859 sgot->contents + got_offset);
1860
1861 /* Fill in the entry in the .rela.plt section. */
1862 rela.r_offset = (sgot->output_section->vma
1863 + sgot->output_offset
1864 + got_offset);
1865 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
1866 rela.r_addend = 0;
1867 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1868 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1869
1870 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1871 {
1872 /* Mark the symbol as undefined, rather than as defined in
1873 the .plt section. Leave the value alone. */
1874 sym->st_shndx = SHN_UNDEF;
1875 }
1876 }
1877
1878 if (h->got.offset != (bfd_vma) -1)
1879 {
1880 asection *sgot;
1881 asection *srela;
1882 Elf_Internal_Rela rela;
1883 bfd_byte *loc;
1884
1885 /* This symbol has an entry in the global offset table. Set it
1886 up. */
1887
1888 sgot = bfd_get_section_by_name (dynobj, ".got");
1889 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1890 BFD_ASSERT (sgot != NULL && srela != NULL);
1891
1892 rela.r_offset = (sgot->output_section->vma
1893 + sgot->output_offset
1894 + (h->got.offset &~ (bfd_vma) 1));
1895
1896 /* If this is a -Bsymbolic link, and the symbol is defined
1897 locally, we just want to emit a RELATIVE reloc. Likewise if
1898 the symbol was forced to be local because of a version file.
1899 The entry in the global offset table will already have been
1900 initialized in the relocate_section function. */
1901 if (info->shared
1902 && (info->symbolic
1903 || h->dynindx == -1
1904 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
1905 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1906 {
1907 rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
1908 rela.r_addend = bfd_get_signed_32 (output_bfd,
1909 (sgot->contents
1910 + (h->got.offset &~ (bfd_vma) 1)));
1911 }
1912 else
1913 {
1914 bfd_put_32 (output_bfd, (bfd_vma) 0,
1915 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
1916 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
1917 rela.r_addend = 0;
1918 }
1919
1920 loc = srela->contents;
1921 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1922 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1923 }
1924
1925 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
1926 {
1927 asection *s;
1928 Elf_Internal_Rela rela;
1929 bfd_byte *loc;
1930
1931 /* This symbol needs a copy reloc. Set it up. */
1932
1933 BFD_ASSERT (h->dynindx != -1
1934 && (h->root.type == bfd_link_hash_defined
1935 || h->root.type == bfd_link_hash_defweak));
1936
1937 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1938 ".rela.bss");
1939 BFD_ASSERT (s != NULL);
1940
1941 rela.r_offset = (h->root.u.def.value
1942 + h->root.u.def.section->output_section->vma
1943 + h->root.u.def.section->output_offset);
1944 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
1945 rela.r_addend = 0;
1946 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1947 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1948 }
1949
1950 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1951 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1952 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1953 sym->st_shndx = SHN_ABS;
1954
1955 return TRUE;
1956 }
1957
1958 /* Finish up the dynamic sections. */
1959
1960 static bfd_boolean
1961 elf_m68k_finish_dynamic_sections (output_bfd, info)
1962 bfd *output_bfd;
1963 struct bfd_link_info *info;
1964 {
1965 bfd *dynobj;
1966 asection *sgot;
1967 asection *sdyn;
1968
1969 dynobj = elf_hash_table (info)->dynobj;
1970
1971 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1972 BFD_ASSERT (sgot != NULL);
1973 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1974
1975 if (elf_hash_table (info)->dynamic_sections_created)
1976 {
1977 asection *splt;
1978 Elf32_External_Dyn *dyncon, *dynconend;
1979
1980 splt = bfd_get_section_by_name (dynobj, ".plt");
1981 BFD_ASSERT (splt != NULL && sdyn != NULL);
1982
1983 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1984 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
1985 for (; dyncon < dynconend; dyncon++)
1986 {
1987 Elf_Internal_Dyn dyn;
1988 const char *name;
1989 asection *s;
1990
1991 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1992
1993 switch (dyn.d_tag)
1994 {
1995 default:
1996 break;
1997
1998 case DT_PLTGOT:
1999 name = ".got";
2000 goto get_vma;
2001 case DT_JMPREL:
2002 name = ".rela.plt";
2003 get_vma:
2004 s = bfd_get_section_by_name (output_bfd, name);
2005 BFD_ASSERT (s != NULL);
2006 dyn.d_un.d_ptr = s->vma;
2007 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2008 break;
2009
2010 case DT_PLTRELSZ:
2011 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2012 BFD_ASSERT (s != NULL);
2013 if (s->_cooked_size != 0)
2014 dyn.d_un.d_val = s->_cooked_size;
2015 else
2016 dyn.d_un.d_val = s->_raw_size;
2017 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2018 break;
2019
2020 case DT_RELASZ:
2021 /* The procedure linkage table relocs (DT_JMPREL) should
2022 not be included in the overall relocs (DT_RELA).
2023 Therefore, we override the DT_RELASZ entry here to
2024 make it not include the JMPREL relocs. Since the
2025 linker script arranges for .rela.plt to follow all
2026 other relocation sections, we don't have to worry
2027 about changing the DT_RELA entry. */
2028 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2029 if (s != NULL)
2030 {
2031 if (s->_cooked_size != 0)
2032 dyn.d_un.d_val -= s->_cooked_size;
2033 else
2034 dyn.d_un.d_val -= s->_raw_size;
2035 }
2036 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2037 break;
2038 }
2039 }
2040
2041 /* Fill in the first entry in the procedure linkage table. */
2042 if (splt->_raw_size > 0)
2043 {
2044 if (!CPU32_FLAG (output_bfd))
2045 {
2046 memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE);
2047 bfd_put_32 (output_bfd,
2048 (sgot->output_section->vma
2049 + sgot->output_offset + 4
2050 - (splt->output_section->vma + 2)),
2051 splt->contents + 4);
2052 bfd_put_32 (output_bfd,
2053 (sgot->output_section->vma
2054 + sgot->output_offset + 8
2055 - (splt->output_section->vma + 10)),
2056 splt->contents + 12);
2057 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2058 = PLT_ENTRY_SIZE;
2059 }
2060 else /* cpu32 */
2061 {
2062 memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE);
2063 bfd_put_32 (output_bfd,
2064 (sgot->output_section->vma
2065 + sgot->output_offset + 4
2066 - (splt->output_section->vma + 2)),
2067 splt->contents + 4);
2068 bfd_put_32 (output_bfd,
2069 (sgot->output_section->vma
2070 + sgot->output_offset + 8
2071 - (splt->output_section->vma + 10)),
2072 splt->contents + 12);
2073 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2074 = PLT_CPU32_ENTRY_SIZE;
2075 }
2076 }
2077 }
2078
2079 /* Fill in the first three entries in the global offset table. */
2080 if (sgot->_raw_size > 0)
2081 {
2082 if (sdyn == NULL)
2083 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2084 else
2085 bfd_put_32 (output_bfd,
2086 sdyn->output_section->vma + sdyn->output_offset,
2087 sgot->contents);
2088 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2089 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2090 }
2091
2092 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2093
2094 return TRUE;
2095 }
2096
2097 /* Given a .data section and a .emreloc in-memory section, store
2098 relocation information into the .emreloc section which can be
2099 used at runtime to relocate the section. This is called by the
2100 linker when the --embedded-relocs switch is used. This is called
2101 after the add_symbols entry point has been called for all the
2102 objects, and before the final_link entry point is called. */
2103
2104 bfd_boolean
2105 bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg)
2106 bfd *abfd;
2107 struct bfd_link_info *info;
2108 asection *datasec;
2109 asection *relsec;
2110 char **errmsg;
2111 {
2112 Elf_Internal_Shdr *symtab_hdr;
2113 Elf_Internal_Sym *isymbuf = NULL;
2114 Elf_Internal_Rela *internal_relocs = NULL;
2115 Elf_Internal_Rela *irel, *irelend;
2116 bfd_byte *p;
2117 bfd_size_type amt;
2118
2119 BFD_ASSERT (! info->relocatable);
2120
2121 *errmsg = NULL;
2122
2123 if (datasec->reloc_count == 0)
2124 return TRUE;
2125
2126 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2127
2128 /* Get a copy of the native relocations. */
2129 internal_relocs = (_bfd_elf_link_read_relocs
2130 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2131 info->keep_memory));
2132 if (internal_relocs == NULL)
2133 goto error_return;
2134
2135 amt = (bfd_size_type) datasec->reloc_count * 12;
2136 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
2137 if (relsec->contents == NULL)
2138 goto error_return;
2139
2140 p = relsec->contents;
2141
2142 irelend = internal_relocs + datasec->reloc_count;
2143 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
2144 {
2145 asection *targetsec;
2146
2147 /* We are going to write a four byte longword into the runtime
2148 reloc section. The longword will be the address in the data
2149 section which must be relocated. It is followed by the name
2150 of the target section NUL-padded or truncated to 8
2151 characters. */
2152
2153 /* We can only relocate absolute longword relocs at run time. */
2154 if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32)
2155 {
2156 *errmsg = _("unsupported reloc type");
2157 bfd_set_error (bfd_error_bad_value);
2158 goto error_return;
2159 }
2160
2161 /* Get the target section referred to by the reloc. */
2162 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2163 {
2164 /* A local symbol. */
2165 Elf_Internal_Sym *isym;
2166
2167 /* Read this BFD's local symbols if we haven't done so already. */
2168 if (isymbuf == NULL)
2169 {
2170 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2171 if (isymbuf == NULL)
2172 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2173 symtab_hdr->sh_info, 0,
2174 NULL, NULL, NULL);
2175 if (isymbuf == NULL)
2176 goto error_return;
2177 }
2178
2179 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2180 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2181 }
2182 else
2183 {
2184 unsigned long indx;
2185 struct elf_link_hash_entry *h;
2186
2187 /* An external symbol. */
2188 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2189 h = elf_sym_hashes (abfd)[indx];
2190 BFD_ASSERT (h != NULL);
2191 if (h->root.type == bfd_link_hash_defined
2192 || h->root.type == bfd_link_hash_defweak)
2193 targetsec = h->root.u.def.section;
2194 else
2195 targetsec = NULL;
2196 }
2197
2198 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
2199 memset (p + 4, 0, 8);
2200 if (targetsec != NULL)
2201 strncpy (p + 4, targetsec->output_section->name, 8);
2202 }
2203
2204 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2205 free (isymbuf);
2206 if (internal_relocs != NULL
2207 && elf_section_data (datasec)->relocs != internal_relocs)
2208 free (internal_relocs);
2209 return TRUE;
2210
2211 error_return:
2212 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2213 free (isymbuf);
2214 if (internal_relocs != NULL
2215 && elf_section_data (datasec)->relocs != internal_relocs)
2216 free (internal_relocs);
2217 return FALSE;
2218 }
2219
2220 static enum elf_reloc_type_class
2221 elf32_m68k_reloc_type_class (rela)
2222 const Elf_Internal_Rela *rela;
2223 {
2224 switch ((int) ELF32_R_TYPE (rela->r_info))
2225 {
2226 case R_68K_RELATIVE:
2227 return reloc_class_relative;
2228 case R_68K_JMP_SLOT:
2229 return reloc_class_plt;
2230 case R_68K_COPY:
2231 return reloc_class_copy;
2232 default:
2233 return reloc_class_normal;
2234 }
2235 }
2236
2237 #define TARGET_BIG_SYM bfd_elf32_m68k_vec
2238 #define TARGET_BIG_NAME "elf32-m68k"
2239 #define ELF_MACHINE_CODE EM_68K
2240 #define ELF_MAXPAGESIZE 0x2000
2241 #define elf_backend_create_dynamic_sections \
2242 _bfd_elf_create_dynamic_sections
2243 #define bfd_elf32_bfd_link_hash_table_create \
2244 elf_m68k_link_hash_table_create
2245 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
2246
2247 #define elf_backend_check_relocs elf_m68k_check_relocs
2248 #define elf_backend_adjust_dynamic_symbol \
2249 elf_m68k_adjust_dynamic_symbol
2250 #define elf_backend_size_dynamic_sections \
2251 elf_m68k_size_dynamic_sections
2252 #define elf_backend_relocate_section elf_m68k_relocate_section
2253 #define elf_backend_finish_dynamic_symbol \
2254 elf_m68k_finish_dynamic_symbol
2255 #define elf_backend_finish_dynamic_sections \
2256 elf_m68k_finish_dynamic_sections
2257 #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
2258 #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook
2259 #define bfd_elf32_bfd_merge_private_bfd_data \
2260 elf32_m68k_merge_private_bfd_data
2261 #define bfd_elf32_bfd_set_private_flags \
2262 elf32_m68k_set_private_flags
2263 #define bfd_elf32_bfd_print_private_bfd_data \
2264 elf32_m68k_print_private_bfd_data
2265 #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class
2266
2267 #define elf_backend_can_gc_sections 1
2268 #define elf_backend_can_refcount 1
2269 #define elf_backend_want_got_plt 1
2270 #define elf_backend_plt_readonly 1
2271 #define elf_backend_want_plt_sym 0
2272 #define elf_backend_got_header_size 12
2273 #define elf_backend_rela_normal 1
2274
2275 #include "elf32-target.h"
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