1 /* Motorola 68k series support for 32-bit ELF
2 Copyright 1993, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
9 (at your option) any later version.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 static reloc_howto_type *reloc_type_lookup
28 PARAMS ((bfd *, bfd_reloc_code_real_type));
29 static void rtype_to_howto
30 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
31 static struct bfd_hash_entry *elf_m68k_link_hash_newfunc
32 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
33 static struct bfd_link_hash_table *elf_m68k_link_hash_table_create
35 static boolean elf_m68k_check_relocs
36 PARAMS ((bfd *, struct bfd_link_info *, asection *,
37 const Elf_Internal_Rela *));
38 static asection *elf_m68k_gc_mark_hook
39 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
40 struct elf_link_hash_entry *, Elf_Internal_Sym *));
41 static boolean elf_m68k_gc_sweep_hook
42 PARAMS ((bfd *, struct bfd_link_info *, asection *,
43 const Elf_Internal_Rela *));
44 static boolean elf_m68k_adjust_dynamic_symbol
45 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
46 static boolean elf_m68k_size_dynamic_sections
47 PARAMS ((bfd *, struct bfd_link_info *));
48 static boolean elf_m68k_relocate_section
49 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51 static boolean elf_m68k_finish_dynamic_symbol
52 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
54 static boolean elf_m68k_finish_dynamic_sections
55 PARAMS ((bfd *, struct bfd_link_info *));
57 static boolean elf32_m68k_set_private_flags
58 PARAMS ((bfd *, flagword));
59 static boolean elf32_m68k_copy_private_bfd_data
60 PARAMS ((bfd *, bfd *));
61 static boolean elf32_m68k_merge_private_bfd_data
62 PARAMS ((bfd *, bfd *));
63 static boolean elf32_m68k_print_private_bfd_data
64 PARAMS ((bfd *, PTR));
66 static reloc_howto_type howto_table[] = {
67 HOWTO(R_68K_NONE, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", false, 0, 0x00000000,false),
68 HOWTO(R_68K_32, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", false, 0, 0xffffffff,false),
69 HOWTO(R_68K_16, 0, 1,16, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", false, 0, 0x0000ffff,false),
70 HOWTO(R_68K_8, 0, 0, 8, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", false, 0, 0x000000ff,false),
71 HOWTO(R_68K_PC32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", false, 0, 0xffffffff,true),
72 HOWTO(R_68K_PC16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", false, 0, 0x0000ffff,true),
73 HOWTO(R_68K_PC8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", false, 0, 0x000000ff,true),
74 HOWTO(R_68K_GOT32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", false, 0, 0xffffffff,true),
75 HOWTO(R_68K_GOT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", false, 0, 0x0000ffff,true),
76 HOWTO(R_68K_GOT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", false, 0, 0x000000ff,true),
77 HOWTO(R_68K_GOT32O, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", false, 0, 0xffffffff,false),
78 HOWTO(R_68K_GOT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", false, 0, 0x0000ffff,false),
79 HOWTO(R_68K_GOT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", false, 0, 0x000000ff,false),
80 HOWTO(R_68K_PLT32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", false, 0, 0xffffffff,true),
81 HOWTO(R_68K_PLT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", false, 0, 0x0000ffff,true),
82 HOWTO(R_68K_PLT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", false, 0, 0x000000ff,true),
83 HOWTO(R_68K_PLT32O, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", false, 0, 0xffffffff,false),
84 HOWTO(R_68K_PLT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", false, 0, 0x0000ffff,false),
85 HOWTO(R_68K_PLT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", false, 0, 0x000000ff,false),
86 HOWTO(R_68K_COPY, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", false, 0, 0xffffffff,false),
87 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),
88 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),
89 HOWTO(R_68K_RELATIVE, 0, 2,32, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", false, 0, 0xffffffff,false),
90 /* GNU extension to record C++ vtable hierarchy */
91 HOWTO (R_68K_GNU_VTINHERIT, /* type */
93 2, /* size (0 = byte, 1 = short, 2 = long) */
95 false, /* pc_relative */
97 complain_overflow_dont, /* complain_on_overflow */
98 NULL, /* special_function */
99 "R_68K_GNU_VTINHERIT", /* name */
100 false, /* partial_inplace */
104 /* GNU extension to record C++ vtable member usage */
105 HOWTO (R_68K_GNU_VTENTRY, /* type */
107 2, /* size (0 = byte, 1 = short, 2 = long) */
109 false, /* pc_relative */
111 complain_overflow_dont, /* complain_on_overflow */
112 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
113 "R_68K_GNU_VTENTRY", /* name */
114 false, /* partial_inplace */
121 rtype_to_howto (abfd, cache_ptr, dst)
122 bfd *abfd ATTRIBUTE_UNUSED;
124 Elf_Internal_Rela *dst;
126 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max);
127 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
130 #define elf_info_to_howto rtype_to_howto
134 bfd_reloc_code_real_type bfd_val;
137 { BFD_RELOC_NONE, R_68K_NONE },
138 { BFD_RELOC_32, R_68K_32 },
139 { BFD_RELOC_16, R_68K_16 },
140 { BFD_RELOC_8, R_68K_8 },
141 { BFD_RELOC_32_PCREL, R_68K_PC32 },
142 { BFD_RELOC_16_PCREL, R_68K_PC16 },
143 { BFD_RELOC_8_PCREL, R_68K_PC8 },
144 { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
145 { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
146 { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
147 { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
148 { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
149 { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
150 { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
151 { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
152 { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
153 { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
154 { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
155 { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
156 { BFD_RELOC_NONE, R_68K_COPY },
157 { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
158 { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
159 { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
160 { BFD_RELOC_CTOR, R_68K_32 },
161 { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
162 { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
165 static reloc_howto_type *
166 reloc_type_lookup (abfd, code)
167 bfd *abfd ATTRIBUTE_UNUSED;
168 bfd_reloc_code_real_type code;
171 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
173 if (reloc_map[i].bfd_val == code)
174 return &howto_table[reloc_map[i].elf_val];
179 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
180 #define ELF_ARCH bfd_arch_m68k
181 /* end code generated by elf.el */
186 /* Functions for the m68k ELF linker. */
188 /* The name of the dynamic interpreter. This is put in the .interp
191 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
193 /* The size in bytes of an entry in the procedure linkage table. */
195 #define PLT_ENTRY_SIZE 20
197 /* The first entry in a procedure linkage table looks like this. See
198 the SVR4 ABI m68k supplement to see how this works. */
200 static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
202 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
203 0, 0, 0, 0, /* replaced with offset to .got + 4. */
204 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
205 0, 0, 0, 0, /* replaced with offset to .got + 8. */
206 0, 0, 0, 0 /* pad out to 20 bytes. */
209 /* Subsequent entries in a procedure linkage table look like this. */
211 static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
213 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
214 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */
215 0x2f, 0x3c, /* move.l #offset,-(%sp) */
216 0, 0, 0, 0, /* replaced with offset into relocation table. */
217 0x60, 0xff, /* bra.l .plt */
218 0, 0, 0, 0 /* replaced with offset to start of .plt. */
221 #define CPU32_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CPU32)
223 #define PLT_CPU32_ENTRY_SIZE 24
224 /* Procedure linkage table entries for the cpu32 */
225 static const bfd_byte elf_cpu32_plt0_entry[PLT_CPU32_ENTRY_SIZE] =
227 0x20, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a0 */
228 0, 0, 0, 0, /* replaced with offset to .got + 4. */
229 0x4e, 0xd0, /* jmp %a0@ */
230 0, 0, 0, 0, /* replace with offset to .got +8. */
231 0, 0, 0, 0, /* pad out to 24 bytes. */
232 0, 0, 0, 0, /* pad out to 24 bytes. */
236 static const bfd_byte elf_cpu32_plt_entry[PLT_CPU32_ENTRY_SIZE] =
238 0x20, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a0 */
239 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */
240 0x4e, 0xd0, /* jmp %a0@ */
241 0x2f, 0x3c, /* move.l #offset,-(%sp) */
242 0, 0, 0, 0, /* replaced with offset into relocation table. */
243 0x60, 0xff, /* bra.l .plt */
244 0, 0, 0, 0, /* replaced with offset to start of .plt. */
248 /* The m68k linker needs to keep track of the number of relocs that it
249 decides to copy in check_relocs for each symbol. This is so that it
250 can discard PC relative relocs if it doesn't need them when linking
251 with -Bsymbolic. We store the information in a field extending the
252 regular ELF linker hash table. */
254 /* This structure keeps track of the number of PC relative relocs we have
255 copied for a given symbol. */
257 struct elf_m68k_pcrel_relocs_copied
260 struct elf_m68k_pcrel_relocs_copied *next;
261 /* A section in dynobj. */
263 /* Number of relocs copied in this section. */
267 /* m68k ELF linker hash entry. */
269 struct elf_m68k_link_hash_entry
271 struct elf_link_hash_entry root;
273 /* Number of PC relative relocs copied for this symbol. */
274 struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
277 /* m68k ELF linker hash table. */
279 struct elf_m68k_link_hash_table
281 struct elf_link_hash_table root;
284 /* Declare this now that the above structures are defined. */
286 static boolean elf_m68k_discard_copies
287 PARAMS ((struct elf_m68k_link_hash_entry *, PTR));
289 /* Traverse an m68k ELF linker hash table. */
291 #define elf_m68k_link_hash_traverse(table, func, info) \
292 (elf_link_hash_traverse \
294 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
297 /* Get the m68k ELF linker hash table from a link_info structure. */
299 #define elf_m68k_hash_table(p) \
300 ((struct elf_m68k_link_hash_table *) (p)->hash)
302 /* Create an entry in an m68k ELF linker hash table. */
304 static struct bfd_hash_entry *
305 elf_m68k_link_hash_newfunc (entry, table, string)
306 struct bfd_hash_entry *entry;
307 struct bfd_hash_table *table;
310 struct elf_m68k_link_hash_entry *ret =
311 (struct elf_m68k_link_hash_entry *) entry;
313 /* Allocate the structure if it has not already been allocated by a
315 if (ret == (struct elf_m68k_link_hash_entry *) NULL)
316 ret = ((struct elf_m68k_link_hash_entry *)
317 bfd_hash_allocate (table,
318 sizeof (struct elf_m68k_link_hash_entry)));
319 if (ret == (struct elf_m68k_link_hash_entry *) NULL)
320 return (struct bfd_hash_entry *) ret;
322 /* Call the allocation method of the superclass. */
323 ret = ((struct elf_m68k_link_hash_entry *)
324 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
326 if (ret != (struct elf_m68k_link_hash_entry *) NULL)
328 ret->pcrel_relocs_copied = NULL;
331 return (struct bfd_hash_entry *) ret;
334 /* Create an m68k ELF linker hash table. */
336 static struct bfd_link_hash_table *
337 elf_m68k_link_hash_table_create (abfd)
340 struct elf_m68k_link_hash_table *ret;
342 ret = ((struct elf_m68k_link_hash_table *)
343 bfd_alloc (abfd, sizeof (struct elf_m68k_link_hash_table)));
344 if (ret == (struct elf_m68k_link_hash_table *) NULL)
347 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
348 elf_m68k_link_hash_newfunc))
350 bfd_release (abfd, ret);
354 return &ret->root.root;
357 /* Keep m68k-specific flags in the ELF header */
359 elf32_m68k_set_private_flags (abfd, flags)
363 elf_elfheader (abfd)->e_flags = flags;
364 elf_flags_init (abfd) = true;
368 /* Copy m68k-specific data from one module to another */
370 elf32_m68k_copy_private_bfd_data (ibfd, obfd)
376 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
377 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
380 in_flags = elf_elfheader (ibfd)->e_flags;
382 elf_elfheader (obfd)->e_flags = in_flags;
383 elf_flags_init (obfd) = true;
388 /* Merge backend specific data from an object file to the output
389 object file when linking. */
391 elf32_m68k_merge_private_bfd_data (ibfd, obfd)
398 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
399 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
402 in_flags = elf_elfheader (ibfd)->e_flags;
403 out_flags = elf_elfheader (obfd)->e_flags;
405 if (!elf_flags_init (obfd))
407 elf_flags_init (obfd) = true;
408 elf_elfheader (obfd)->e_flags = in_flags;
414 /* Display the flags field */
416 elf32_m68k_print_private_bfd_data (abfd, ptr)
420 FILE *file = (FILE *) ptr;
422 BFD_ASSERT (abfd != NULL && ptr != NULL);
424 /* Print normal ELF private data. */
425 _bfd_elf_print_private_bfd_data (abfd, ptr);
427 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
429 /* xgettext:c-format */
430 fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
432 if (elf_elfheader (abfd)->e_flags & EF_CPU32)
433 fprintf (file, _ (" [cpu32]"));
439 /* Look through the relocs for a section during the first phase, and
440 allocate space in the global offset table or procedure linkage
444 elf_m68k_check_relocs (abfd, info, sec, relocs)
446 struct bfd_link_info *info;
448 const Elf_Internal_Rela *relocs;
451 Elf_Internal_Shdr *symtab_hdr;
452 struct elf_link_hash_entry **sym_hashes;
453 bfd_signed_vma *local_got_refcounts;
454 const Elf_Internal_Rela *rel;
455 const Elf_Internal_Rela *rel_end;
460 if (info->relocateable)
463 dynobj = elf_hash_table (info)->dynobj;
464 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
465 sym_hashes = elf_sym_hashes (abfd);
466 local_got_refcounts = elf_local_got_refcounts (abfd);
472 rel_end = relocs + sec->reloc_count;
473 for (rel = relocs; rel < rel_end; rel++)
475 unsigned long r_symndx;
476 struct elf_link_hash_entry *h;
478 r_symndx = ELF32_R_SYM (rel->r_info);
480 if (r_symndx < symtab_hdr->sh_info)
483 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
485 switch (ELF32_R_TYPE (rel->r_info))
491 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
497 /* This symbol requires a global offset table entry. */
501 /* Create the .got section. */
502 elf_hash_table (info)->dynobj = dynobj = abfd;
503 if (!_bfd_elf_create_got_section (dynobj, info))
509 sgot = bfd_get_section_by_name (dynobj, ".got");
510 BFD_ASSERT (sgot != NULL);
514 && (h != NULL || info->shared))
516 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
519 srelgot = bfd_make_section (dynobj, ".rela.got");
521 || !bfd_set_section_flags (dynobj, srelgot,
528 || !bfd_set_section_alignment (dynobj, srelgot, 2))
535 if (h->got.refcount == -1)
539 /* Make sure this symbol is output as a dynamic symbol. */
540 if (h->dynindx == -1)
542 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
546 /* Allocate space in the .got section. */
547 sgot->_raw_size += 4;
548 /* Allocate relocation space. */
549 srelgot->_raw_size += sizeof (Elf32_External_Rela);
556 /* This is a global offset table entry for a local symbol. */
557 if (local_got_refcounts == NULL)
561 size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
562 local_got_refcounts = ((bfd_signed_vma *)
563 bfd_alloc (abfd, size));
564 if (local_got_refcounts == NULL)
566 elf_local_got_refcounts (abfd) = local_got_refcounts;
567 memset (local_got_refcounts, -1, size);
569 if (local_got_refcounts[r_symndx] == -1)
571 local_got_refcounts[r_symndx] = 1;
573 sgot->_raw_size += 4;
576 /* If we are generating a shared object, we need to
577 output a R_68K_RELATIVE reloc so that the dynamic
578 linker can adjust this GOT entry. */
579 srelgot->_raw_size += sizeof (Elf32_External_Rela);
583 local_got_refcounts[r_symndx]++;
590 /* This symbol requires a procedure linkage table entry. We
591 actually build the entry in adjust_dynamic_symbol,
592 because this might be a case of linking PIC code which is
593 never referenced by a dynamic object, in which case we
594 don't need to generate a procedure linkage table entry
597 /* If this is a local symbol, we resolve it directly without
598 creating a procedure linkage table entry. */
602 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
603 if (h->plt.refcount == -1)
612 /* This symbol requires a procedure linkage table entry. */
616 /* It does not make sense to have this relocation for a
617 local symbol. FIXME: does it? How to handle it if
618 it does make sense? */
619 bfd_set_error (bfd_error_bad_value);
623 /* Make sure this symbol is output as a dynamic symbol. */
624 if (h->dynindx == -1)
626 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
630 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
631 if (h->plt.refcount == -1)
640 /* If we are creating a shared library and this is not a local
641 symbol, we need to copy the reloc into the shared library.
642 However when linking with -Bsymbolic and this is a global
643 symbol which is defined in an object we are including in the
644 link (i.e., DEF_REGULAR is set), then we can resolve the
645 reloc directly. At this point we have not seen all the input
646 files, so it is possible that DEF_REGULAR is not set now but
647 will be set later (it is never cleared). We account for that
648 possibility below by storing information in the
649 pcrel_relocs_copied field of the hash table entry. */
651 && (sec->flags & SEC_ALLOC) != 0
654 || (h->elf_link_hash_flags
655 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
659 /* Make sure a plt entry is created for this symbol if
660 it turns out to be a function defined by a dynamic
662 if (h->plt.refcount == -1)
675 /* Make sure a plt entry is created for this symbol if it
676 turns out to be a function defined by a dynamic object. */
677 if (h->plt.refcount == -1)
683 /* If we are creating a shared library, we need to copy the
684 reloc into the shared library. */
686 && (sec->flags & SEC_ALLOC) != 0)
688 /* When creating a shared object, we must copy these
689 reloc types into the output file. We create a reloc
690 section in dynobj and make room for this reloc. */
695 name = (bfd_elf_string_from_elf_section
697 elf_elfheader (abfd)->e_shstrndx,
698 elf_section_data (sec)->rel_hdr.sh_name));
702 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
703 && strcmp (bfd_get_section_name (abfd, sec),
706 sreloc = bfd_get_section_by_name (dynobj, name);
709 sreloc = bfd_make_section (dynobj, name);
711 || !bfd_set_section_flags (dynobj, sreloc,
718 || !bfd_set_section_alignment (dynobj, sreloc, 2))
723 sreloc->_raw_size += sizeof (Elf32_External_Rela);
725 /* If we are linking with -Bsymbolic, we count the number of
726 PC relative relocations we have entered for this symbol,
727 so that we can discard them again if the symbol is later
728 defined by a regular object. Note that this function is
729 only called if we are using an m68kelf linker hash table,
730 which means that h is really a pointer to an
731 elf_m68k_link_hash_entry. */
732 if ((ELF32_R_TYPE (rel->r_info) == R_68K_PC8
733 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
734 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
737 struct elf_m68k_link_hash_entry *eh;
738 struct elf_m68k_pcrel_relocs_copied *p;
740 eh = (struct elf_m68k_link_hash_entry *) h;
742 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
743 if (p->section == sreloc)
748 p = ((struct elf_m68k_pcrel_relocs_copied *)
749 bfd_alloc (dynobj, sizeof *p));
752 p->next = eh->pcrel_relocs_copied;
753 eh->pcrel_relocs_copied = p;
764 /* This relocation describes the C++ object vtable hierarchy.
765 Reconstruct it for later use during GC. */
766 case R_68K_GNU_VTINHERIT:
767 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
771 /* This relocation describes which C++ vtable entries are actually
772 used. Record for later use during GC. */
773 case R_68K_GNU_VTENTRY:
774 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
786 /* Return the section that should be marked against GC for a given
790 elf_m68k_gc_mark_hook (abfd, info, rel, h, sym)
792 struct bfd_link_info *info ATTRIBUTE_UNUSED;
793 Elf_Internal_Rela *rel;
794 struct elf_link_hash_entry *h;
795 Elf_Internal_Sym *sym;
799 switch (ELF32_R_TYPE (rel->r_info))
801 case R_68K_GNU_VTINHERIT:
802 case R_68K_GNU_VTENTRY:
806 switch (h->root.type)
811 case bfd_link_hash_defined:
812 case bfd_link_hash_defweak:
813 return h->root.u.def.section;
815 case bfd_link_hash_common:
816 return h->root.u.c.p->section;
822 if (!(elf_bad_symtab (abfd)
823 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
824 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
825 && sym->st_shndx != SHN_COMMON))
827 return bfd_section_from_elf_index (abfd, sym->st_shndx);
834 /* Update the got entry reference counts for the section being removed. */
837 elf_m68k_gc_sweep_hook (abfd, info, sec, relocs)
839 struct bfd_link_info *info;
841 const Elf_Internal_Rela *relocs;
843 Elf_Internal_Shdr *symtab_hdr;
844 struct elf_link_hash_entry **sym_hashes;
845 bfd_signed_vma *local_got_refcounts;
846 const Elf_Internal_Rela *rel, *relend;
847 unsigned long r_symndx;
848 struct elf_link_hash_entry *h;
853 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
854 sym_hashes = elf_sym_hashes (abfd);
855 local_got_refcounts = elf_local_got_refcounts (abfd);
857 dynobj = elf_hash_table (info)->dynobj;
860 sgot = bfd_get_section_by_name (dynobj, ".got");
861 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
864 relend = relocs + sec->reloc_count;
865 for (rel = relocs; rel < relend; rel++)
867 switch (ELF32_R_TYPE (rel->r_info))
875 r_symndx = ELF32_R_SYM (rel->r_info);
876 if (r_symndx >= symtab_hdr->sh_info)
878 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
879 if (h->got.refcount > 0)
882 if (h->got.refcount == 0)
884 /* We don't need the .got entry any more. */
885 sgot->_raw_size -= 4;
886 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
892 if (local_got_refcounts[r_symndx] > 0)
894 --local_got_refcounts[r_symndx];
895 if (local_got_refcounts[r_symndx] == 0)
897 /* We don't need the .got entry any more. */
898 sgot->_raw_size -= 4;
900 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
918 r_symndx = ELF32_R_SYM (rel->r_info);
919 if (r_symndx >= symtab_hdr->sh_info)
921 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
922 if (h->plt.refcount > 0)
936 /* Adjust a symbol defined by a dynamic object and referenced by a
937 regular object. The current definition is in some section of the
938 dynamic object, but we're not including those sections. We have to
939 change the definition to something the rest of the link can
943 elf_m68k_adjust_dynamic_symbol (info, h)
944 struct bfd_link_info *info;
945 struct elf_link_hash_entry *h;
949 unsigned int power_of_two;
951 dynobj = elf_hash_table (info)->dynobj;
953 /* Make sure we know what is going on here. */
954 BFD_ASSERT (dynobj != NULL
955 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
956 || h->weakdef != NULL
957 || ((h->elf_link_hash_flags
958 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
959 && (h->elf_link_hash_flags
960 & ELF_LINK_HASH_REF_REGULAR) != 0
961 && (h->elf_link_hash_flags
962 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
964 /* If this is a function, put it in the procedure linkage table. We
965 will fill in the contents of the procedure linkage table later,
966 when we know the address of the .got section. */
967 if (h->type == STT_FUNC
968 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
971 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
972 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
973 /* We must always create the plt entry if it was referenced
974 by a PLTxxO relocation. In this case we already recorded
975 it as a dynamic symbol. */
978 /* This case can occur if we saw a PLTxx reloc in an input
979 file, but the symbol was never referred to by a dynamic
980 object. In such a case, we don't actually need to build
981 a procedure linkage table, and we can just do a PCxx
983 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
984 h->plt.offset = (bfd_vma) -1;
988 /* GC may have rendered this entry unused. */
989 if (h->plt.refcount <= 0)
991 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
992 h->plt.offset = (bfd_vma) -1;
996 /* Make sure this symbol is output as a dynamic symbol. */
997 if (h->dynindx == -1)
999 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1003 s = bfd_get_section_by_name (dynobj, ".plt");
1004 BFD_ASSERT (s != NULL);
1006 /* If this is the first .plt entry, make room for the special
1008 if (s->_raw_size == 0)
1010 if (CPU32_FLAG (dynobj))
1011 s->_raw_size += PLT_CPU32_ENTRY_SIZE;
1013 s->_raw_size += PLT_ENTRY_SIZE;
1016 /* If this symbol is not defined in a regular file, and we are
1017 not generating a shared library, then set the symbol to this
1018 location in the .plt. This is required to make function
1019 pointers compare as equal between the normal executable and
1020 the shared library. */
1022 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1024 h->root.u.def.section = s;
1025 h->root.u.def.value = s->_raw_size;
1028 h->plt.offset = s->_raw_size;
1030 /* Make room for this entry. */
1031 if (CPU32_FLAG (dynobj))
1032 s->_raw_size += PLT_CPU32_ENTRY_SIZE;
1034 s->_raw_size += PLT_ENTRY_SIZE;
1036 /* We also need to make an entry in the .got.plt section, which
1037 will be placed in the .got section by the linker script. */
1039 s = bfd_get_section_by_name (dynobj, ".got.plt");
1040 BFD_ASSERT (s != NULL);
1043 /* We also need to make an entry in the .rela.plt section. */
1045 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1046 BFD_ASSERT (s != NULL);
1047 s->_raw_size += sizeof (Elf32_External_Rela);
1052 /* Reinitialize the plt offset now that it is not used as a reference
1054 h->plt.offset = (bfd_vma) -1;
1056 /* If this is a weak symbol, and there is a real definition, the
1057 processor independent code will have arranged for us to see the
1058 real definition first, and we can just use the same value. */
1059 if (h->weakdef != NULL)
1061 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1062 || h->weakdef->root.type == bfd_link_hash_defweak);
1063 h->root.u.def.section = h->weakdef->root.u.def.section;
1064 h->root.u.def.value = h->weakdef->root.u.def.value;
1068 /* This is a reference to a symbol defined by a dynamic object which
1069 is not a function. */
1071 /* If we are creating a shared library, we must presume that the
1072 only references to the symbol are via the global offset table.
1073 For such cases we need not do anything here; the relocations will
1074 be handled correctly by relocate_section. */
1078 /* We must allocate the symbol in our .dynbss section, which will
1079 become part of the .bss section of the executable. There will be
1080 an entry for this symbol in the .dynsym section. The dynamic
1081 object will contain position independent code, so all references
1082 from the dynamic object to this symbol will go through the global
1083 offset table. The dynamic linker will use the .dynsym entry to
1084 determine the address it must put in the global offset table, so
1085 both the dynamic object and the regular object will refer to the
1086 same memory location for the variable. */
1088 s = bfd_get_section_by_name (dynobj, ".dynbss");
1089 BFD_ASSERT (s != NULL);
1091 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
1092 copy the initial value out of the dynamic object and into the
1093 runtime process image. We need to remember the offset into the
1094 .rela.bss section we are going to use. */
1095 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1099 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1100 BFD_ASSERT (srel != NULL);
1101 srel->_raw_size += sizeof (Elf32_External_Rela);
1102 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1105 /* We need to figure out the alignment required for this symbol. I
1106 have no idea how ELF linkers handle this. */
1107 power_of_two = bfd_log2 (h->size);
1108 if (power_of_two > 3)
1111 /* Apply the required alignment. */
1112 s->_raw_size = BFD_ALIGN (s->_raw_size,
1113 (bfd_size_type) (1 << power_of_two));
1114 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1116 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1120 /* Define the symbol as being at this point in the section. */
1121 h->root.u.def.section = s;
1122 h->root.u.def.value = s->_raw_size;
1124 /* Increment the section size to make room for the symbol. */
1125 s->_raw_size += h->size;
1130 /* Set the sizes of the dynamic sections. */
1133 elf_m68k_size_dynamic_sections (output_bfd, info)
1135 struct bfd_link_info *info;
1143 dynobj = elf_hash_table (info)->dynobj;
1144 BFD_ASSERT (dynobj != NULL);
1146 if (elf_hash_table (info)->dynamic_sections_created)
1148 /* Set the contents of the .interp section to the interpreter. */
1151 s = bfd_get_section_by_name (dynobj, ".interp");
1152 BFD_ASSERT (s != NULL);
1153 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1154 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1159 /* We may have created entries in the .rela.got section.
1160 However, if we are not creating the dynamic sections, we will
1161 not actually use these entries. Reset the size of .rela.got,
1162 which will cause it to get stripped from the output file
1164 s = bfd_get_section_by_name (dynobj, ".rela.got");
1169 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1170 relative relocs against symbols defined in a regular object. We
1171 allocated space for them in the check_relocs routine, but we will not
1172 fill them in in the relocate_section routine. */
1173 if (info->shared && info->symbolic)
1174 elf_m68k_link_hash_traverse (elf_m68k_hash_table (info),
1175 elf_m68k_discard_copies,
1178 /* The check_relocs and adjust_dynamic_symbol entry points have
1179 determined the sizes of the various dynamic sections. Allocate
1184 for (s = dynobj->sections; s != NULL; s = s->next)
1189 if ((s->flags & SEC_LINKER_CREATED) == 0)
1192 /* It's OK to base decisions on the section name, because none
1193 of the dynobj section names depend upon the input files. */
1194 name = bfd_get_section_name (dynobj, s);
1198 if (strcmp (name, ".plt") == 0)
1200 if (s->_raw_size == 0)
1202 /* Strip this section if we don't need it; see the
1208 /* Remember whether there is a PLT. */
1212 else if (strncmp (name, ".rela", 5) == 0)
1214 if (s->_raw_size == 0)
1216 /* If we don't need this section, strip it from the
1217 output file. This is mostly to handle .rela.bss and
1218 .rela.plt. We must create both sections in
1219 create_dynamic_sections, because they must be created
1220 before the linker maps input sections to output
1221 sections. The linker does that before
1222 adjust_dynamic_symbol is called, and it is that
1223 function which decides whether anything needs to go
1224 into these sections. */
1231 /* Remember whether there are any reloc sections other
1233 if (strcmp (name, ".rela.plt") != 0)
1235 const char *outname;
1239 /* If this relocation section applies to a read only
1240 section, then we probably need a DT_TEXTREL
1241 entry. .rela.plt is actually associated with
1242 .got.plt, which is never readonly. */
1243 outname = bfd_get_section_name (output_bfd,
1245 target = bfd_get_section_by_name (output_bfd, outname + 5);
1247 && (target->flags & SEC_READONLY) != 0
1248 && (target->flags & SEC_ALLOC) != 0)
1252 /* We use the reloc_count field as a counter if we need
1253 to copy relocs into the output file. */
1257 else if (strncmp (name, ".got", 4) != 0)
1259 /* It's not one of our sections, so don't allocate space. */
1265 _bfd_strip_section_from_output (s);
1269 /* Allocate memory for the section contents. */
1270 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
1271 if (s->contents == NULL && s->_raw_size != 0)
1275 if (elf_hash_table (info)->dynamic_sections_created)
1277 /* Add some entries to the .dynamic section. We fill in the
1278 values later, in elf_m68k_finish_dynamic_sections, but we
1279 must add the entries now so that we get the correct size for
1280 the .dynamic section. The DT_DEBUG entry is filled in by the
1281 dynamic linker and used by the debugger. */
1284 if (!bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
1290 if (!bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
1291 || !bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
1292 || !bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
1293 || !bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
1299 if (!bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
1300 || !bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
1301 || !bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
1302 sizeof (Elf32_External_Rela)))
1308 if (!bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
1316 /* This function is called via elf_m68k_link_hash_traverse if we are
1317 creating a shared object with -Bsymbolic. It discards the space
1318 allocated to copy PC relative relocs against symbols which are defined
1319 in regular objects. We allocated space for them in the check_relocs
1320 routine, but we won't fill them in in the relocate_section routine. */
1324 elf_m68k_discard_copies (h, ignore)
1325 struct elf_m68k_link_hash_entry *h;
1326 PTR ignore ATTRIBUTE_UNUSED;
1328 struct elf_m68k_pcrel_relocs_copied *s;
1330 /* We only discard relocs for symbols defined in a regular object. */
1331 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1334 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1335 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
1340 /* Relocate an M68K ELF section. */
1343 elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
1344 contents, relocs, local_syms, local_sections)
1346 struct bfd_link_info *info;
1348 asection *input_section;
1350 Elf_Internal_Rela *relocs;
1351 Elf_Internal_Sym *local_syms;
1352 asection **local_sections;
1355 Elf_Internal_Shdr *symtab_hdr;
1356 struct elf_link_hash_entry **sym_hashes;
1357 bfd_vma *local_got_offsets;
1361 Elf_Internal_Rela *rel;
1362 Elf_Internal_Rela *relend;
1364 dynobj = elf_hash_table (info)->dynobj;
1365 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1366 sym_hashes = elf_sym_hashes (input_bfd);
1367 local_got_offsets = elf_local_got_offsets (input_bfd);
1374 relend = relocs + input_section->reloc_count;
1375 for (; rel < relend; rel++)
1378 reloc_howto_type *howto;
1379 unsigned long r_symndx;
1380 struct elf_link_hash_entry *h;
1381 Elf_Internal_Sym *sym;
1384 bfd_reloc_status_type r;
1386 r_type = ELF32_R_TYPE (rel->r_info);
1387 if (r_type < 0 || r_type >= (int) R_68K_max)
1389 bfd_set_error (bfd_error_bad_value);
1392 howto = howto_table + r_type;
1394 r_symndx = ELF32_R_SYM (rel->r_info);
1396 if (info->relocateable)
1398 /* This is a relocateable link. We don't have to change
1399 anything, unless the reloc is against a section symbol,
1400 in which case we have to adjust according to where the
1401 section symbol winds up in the output section. */
1402 if (r_symndx < symtab_hdr->sh_info)
1404 sym = local_syms + r_symndx;
1405 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1407 sec = local_sections[r_symndx];
1408 rel->r_addend += sec->output_offset + sym->st_value;
1415 /* This is a final link. */
1419 if (r_symndx < symtab_hdr->sh_info)
1421 sym = local_syms + r_symndx;
1422 sec = local_sections[r_symndx];
1423 relocation = (sec->output_section->vma
1424 + sec->output_offset
1429 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1430 while (h->root.type == bfd_link_hash_indirect
1431 || h->root.type == bfd_link_hash_warning)
1432 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1433 if (h->root.type == bfd_link_hash_defined
1434 || h->root.type == bfd_link_hash_defweak)
1436 sec = h->root.u.def.section;
1437 if (((r_type == R_68K_PLT8
1438 || r_type == R_68K_PLT16
1439 || r_type == R_68K_PLT32
1440 || r_type == R_68K_PLT8O
1441 || r_type == R_68K_PLT16O
1442 || r_type == R_68K_PLT32O)
1443 && h->plt.offset != (bfd_vma) -1
1444 && elf_hash_table (info)->dynamic_sections_created)
1445 || ((r_type == R_68K_GOT8O
1446 || r_type == R_68K_GOT16O
1447 || r_type == R_68K_GOT32O
1448 || ((r_type == R_68K_GOT8
1449 || r_type == R_68K_GOT16
1450 || r_type == R_68K_GOT32)
1451 && strcmp (h->root.root.string,
1452 "_GLOBAL_OFFSET_TABLE_") != 0))
1453 && elf_hash_table (info)->dynamic_sections_created
1455 || (! info->symbolic && h->dynindx != -1)
1456 || (h->elf_link_hash_flags
1457 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1459 && ((! info->symbolic && h->dynindx != -1)
1460 || (h->elf_link_hash_flags
1461 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1462 && (input_section->flags & SEC_ALLOC) != 0
1463 && (r_type == R_68K_8
1464 || r_type == R_68K_16
1465 || r_type == R_68K_32
1466 || r_type == R_68K_PC8
1467 || r_type == R_68K_PC16
1468 || r_type == R_68K_PC32)))
1470 /* In these cases, we don't need the relocation
1471 value. We check specially because in some
1472 obscure cases sec->output_section will be NULL. */
1476 relocation = (h->root.u.def.value
1477 + sec->output_section->vma
1478 + sec->output_offset);
1480 else if (h->root.type == bfd_link_hash_undefweak)
1482 else if (info->shared && !info->symbolic && !info->no_undefined)
1486 if (!(info->callbacks->undefined_symbol
1487 (info, h->root.root.string, input_bfd,
1488 input_section, rel->r_offset)))
1499 /* Relocation is to the address of the entry for this symbol
1500 in the global offset table. */
1502 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1508 /* Relocation is the offset of the entry for this symbol in
1509 the global offset table. */
1516 sgot = bfd_get_section_by_name (dynobj, ".got");
1517 BFD_ASSERT (sgot != NULL);
1522 off = h->got.offset;
1523 BFD_ASSERT (off != (bfd_vma) -1);
1525 if (!elf_hash_table (info)->dynamic_sections_created
1527 && (info->symbolic || h->dynindx == -1)
1528 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1530 /* This is actually a static link, or it is a
1531 -Bsymbolic link and the symbol is defined
1532 locally, or the symbol was forced to be local
1533 because of a version file.. We must initialize
1534 this entry in the global offset table. Since
1535 the offset must always be a multiple of 4, we
1536 use the least significant bit to record whether
1537 we have initialized it already.
1539 When doing a dynamic link, we create a .rela.got
1540 relocation entry to initialize the value. This
1541 is done in the finish_dynamic_symbol routine. */
1546 bfd_put_32 (output_bfd, relocation,
1547 sgot->contents + off);
1554 BFD_ASSERT (local_got_offsets != NULL
1555 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1557 off = local_got_offsets[r_symndx];
1559 /* The offset must always be a multiple of 4. We use
1560 the least significant bit to record whether we have
1561 already generated the necessary reloc. */
1566 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1571 Elf_Internal_Rela outrel;
1573 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1574 BFD_ASSERT (srelgot != NULL);
1576 outrel.r_offset = (sgot->output_section->vma
1577 + sgot->output_offset
1579 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
1580 outrel.r_addend = relocation;
1581 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1582 (((Elf32_External_Rela *)
1584 + srelgot->reloc_count));
1585 ++srelgot->reloc_count;
1588 local_got_offsets[r_symndx] |= 1;
1592 relocation = sgot->output_offset + off;
1593 if (r_type == R_68K_GOT8O
1594 || r_type == R_68K_GOT16O
1595 || r_type == R_68K_GOT32O)
1597 /* This relocation does not use the addend. */
1601 relocation += sgot->output_section->vma;
1608 /* Relocation is to the entry for this symbol in the
1609 procedure linkage table. */
1611 /* Resolve a PLTxx reloc against a local symbol directly,
1612 without using the procedure linkage table. */
1616 if (h->plt.offset == (bfd_vma) -1
1617 || !elf_hash_table (info)->dynamic_sections_created)
1619 /* We didn't make a PLT entry for this symbol. This
1620 happens when statically linking PIC code, or when
1621 using -Bsymbolic. */
1627 splt = bfd_get_section_by_name (dynobj, ".plt");
1628 BFD_ASSERT (splt != NULL);
1631 relocation = (splt->output_section->vma
1632 + splt->output_offset
1639 /* Relocation is the offset of the entry for this symbol in
1640 the procedure linkage table. */
1641 BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
1645 splt = bfd_get_section_by_name (dynobj, ".plt");
1646 BFD_ASSERT (splt != NULL);
1649 relocation = h->plt.offset;
1651 /* This relocation does not use the addend. */
1666 && (input_section->flags & SEC_ALLOC) != 0
1667 && ((r_type != R_68K_PC8
1668 && r_type != R_68K_PC16
1669 && r_type != R_68K_PC32)
1671 || (h->elf_link_hash_flags
1672 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1674 Elf_Internal_Rela outrel;
1675 boolean skip, relocate;
1677 /* When generating a shared object, these relocations
1678 are copied into the output file to be resolved at run
1685 name = (bfd_elf_string_from_elf_section
1687 elf_elfheader (input_bfd)->e_shstrndx,
1688 elf_section_data (input_section)->rel_hdr.sh_name));
1692 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1693 && strcmp (bfd_get_section_name (input_bfd,
1697 sreloc = bfd_get_section_by_name (dynobj, name);
1698 BFD_ASSERT (sreloc != NULL);
1703 if (elf_section_data (input_section)->stab_info == NULL)
1704 outrel.r_offset = rel->r_offset;
1709 off = (_bfd_stab_section_offset
1710 (output_bfd, &elf_hash_table (info)->stab_info,
1712 &elf_section_data (input_section)->stab_info,
1714 if (off == (bfd_vma) -1)
1716 outrel.r_offset = off;
1719 outrel.r_offset += (input_section->output_section->vma
1720 + input_section->output_offset);
1724 memset (&outrel, 0, sizeof outrel);
1727 /* h->dynindx may be -1 if the symbol was marked to
1730 && ((! info->symbolic && h->dynindx != -1)
1731 || (h->elf_link_hash_flags
1732 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1734 BFD_ASSERT (h->dynindx != -1);
1736 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1737 outrel.r_addend = relocation + rel->r_addend;
1741 if (r_type == R_68K_32)
1744 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
1745 outrel.r_addend = relocation + rel->r_addend;
1752 sec = local_sections[r_symndx];
1755 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1757 == bfd_link_hash_defweak));
1758 sec = h->root.u.def.section;
1760 if (sec != NULL && bfd_is_abs_section (sec))
1762 else if (sec == NULL || sec->owner == NULL)
1764 bfd_set_error (bfd_error_bad_value);
1771 osec = sec->output_section;
1772 indx = elf_section_data (osec)->dynindx;
1773 BFD_ASSERT (indx > 0);
1777 outrel.r_info = ELF32_R_INFO (indx, r_type);
1778 outrel.r_addend = relocation + rel->r_addend;
1782 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1783 (((Elf32_External_Rela *)
1785 + sreloc->reloc_count));
1786 ++sreloc->reloc_count;
1788 /* This reloc will be computed at runtime, so there's no
1789 need to do anything now, except for R_68K_32
1790 relocations that have been turned into
1798 case R_68K_GNU_VTINHERIT:
1799 case R_68K_GNU_VTENTRY:
1800 /* These are no-ops in the end. */
1807 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1808 contents, rel->r_offset,
1809 relocation, rel->r_addend);
1811 if (r != bfd_reloc_ok)
1816 case bfd_reloc_outofrange:
1818 case bfd_reloc_overflow:
1823 name = h->root.root.string;
1826 name = bfd_elf_string_from_elf_section (input_bfd,
1827 symtab_hdr->sh_link,
1832 name = bfd_section_name (input_bfd, sec);
1834 if (!(info->callbacks->reloc_overflow
1835 (info, name, howto->name, (bfd_vma) 0,
1836 input_bfd, input_section, rel->r_offset)))
1847 /* Finish up dynamic symbol handling. We set the contents of various
1848 dynamic sections here. */
1851 elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
1853 struct bfd_link_info *info;
1854 struct elf_link_hash_entry *h;
1855 Elf_Internal_Sym *sym;
1858 int plt_off1, plt_off2, plt_off3;
1860 dynobj = elf_hash_table (info)->dynobj;
1862 if (h->plt.offset != (bfd_vma) -1)
1869 Elf_Internal_Rela rela;
1871 /* This symbol has an entry in the procedure linkage table. Set
1874 BFD_ASSERT (h->dynindx != -1);
1876 splt = bfd_get_section_by_name (dynobj, ".plt");
1877 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1878 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1879 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1881 /* Get the index in the procedure linkage table which
1882 corresponds to this symbol. This is the index of this symbol
1883 in all the symbols for which we are making plt entries. The
1884 first entry in the procedure linkage table is reserved. */
1885 if ( CPU32_FLAG (output_bfd))
1886 plt_index = h->plt.offset / PLT_CPU32_ENTRY_SIZE - 1;
1888 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1890 /* Get the offset into the .got table of the entry that
1891 corresponds to this function. Each .got entry is 4 bytes.
1892 The first three are reserved. */
1893 got_offset = (plt_index + 3) * 4;
1895 if ( CPU32_FLAG (output_bfd))
1897 /* Fill in the entry in the procedure linkage table. */
1898 memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry,
1899 PLT_CPU32_ENTRY_SIZE);
1906 /* Fill in the entry in the procedure linkage table. */
1907 memcpy (splt->contents + h->plt.offset, elf_m68k_plt_entry,
1914 /* The offset is relative to the first extension word. */
1915 bfd_put_32 (output_bfd,
1916 (sgot->output_section->vma
1917 + sgot->output_offset
1919 - (splt->output_section->vma
1920 + h->plt.offset + 2)),
1921 splt->contents + h->plt.offset + plt_off1);
1923 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1924 splt->contents + h->plt.offset + plt_off2);
1925 bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3),
1926 splt->contents + h->plt.offset + plt_off3);
1928 /* Fill in the entry in the global offset table. */
1929 bfd_put_32 (output_bfd,
1930 (splt->output_section->vma
1931 + splt->output_offset
1934 sgot->contents + got_offset);
1936 /* Fill in the entry in the .rela.plt section. */
1937 rela.r_offset = (sgot->output_section->vma
1938 + sgot->output_offset
1940 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
1942 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1943 ((Elf32_External_Rela *) srela->contents
1946 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1948 /* Mark the symbol as undefined, rather than as defined in
1949 the .plt section. Leave the value alone. */
1950 sym->st_shndx = SHN_UNDEF;
1954 if (h->got.offset != (bfd_vma) -1)
1958 Elf_Internal_Rela rela;
1960 /* This symbol has an entry in the global offset table. Set it
1963 sgot = bfd_get_section_by_name (dynobj, ".got");
1964 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1965 BFD_ASSERT (sgot != NULL && srela != NULL);
1967 rela.r_offset = (sgot->output_section->vma
1968 + sgot->output_offset
1969 + (h->got.offset &~ 1));
1971 /* If this is a -Bsymbolic link, and the symbol is defined
1972 locally, we just want to emit a RELATIVE reloc. Likewise if
1973 the symbol was forced to be local because of a version file.
1974 The entry in the global offset table will already have been
1975 initialized in the relocate_section function. */
1977 && (info->symbolic || h->dynindx == -1)
1978 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1980 rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
1981 rela.r_addend = bfd_get_signed_32 (output_bfd,
1983 + (h->got.offset & ~1)));
1987 bfd_put_32 (output_bfd, (bfd_vma) 0,
1988 sgot->contents + (h->got.offset & ~1));
1989 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
1993 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1994 ((Elf32_External_Rela *) srela->contents
1995 + srela->reloc_count));
1996 ++srela->reloc_count;
1999 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2002 Elf_Internal_Rela rela;
2004 /* This symbol needs a copy reloc. Set it up. */
2006 BFD_ASSERT (h->dynindx != -1
2007 && (h->root.type == bfd_link_hash_defined
2008 || h->root.type == bfd_link_hash_defweak));
2010 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2012 BFD_ASSERT (s != NULL);
2014 rela.r_offset = (h->root.u.def.value
2015 + h->root.u.def.section->output_section->vma
2016 + h->root.u.def.section->output_offset);
2017 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
2019 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2020 ((Elf32_External_Rela *) s->contents
2025 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2026 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2027 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2028 sym->st_shndx = SHN_ABS;
2033 /* Finish up the dynamic sections. */
2036 elf_m68k_finish_dynamic_sections (output_bfd, info)
2038 struct bfd_link_info *info;
2044 dynobj = elf_hash_table (info)->dynobj;
2046 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2047 BFD_ASSERT (sgot != NULL);
2048 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2050 if (elf_hash_table (info)->dynamic_sections_created)
2053 Elf32_External_Dyn *dyncon, *dynconend;
2055 splt = bfd_get_section_by_name (dynobj, ".plt");
2056 BFD_ASSERT (splt != NULL && sdyn != NULL);
2058 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2059 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2060 for (; dyncon < dynconend; dyncon++)
2062 Elf_Internal_Dyn dyn;
2066 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2079 s = bfd_get_section_by_name (output_bfd, name);
2080 BFD_ASSERT (s != NULL);
2081 dyn.d_un.d_ptr = s->vma;
2082 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2086 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2087 BFD_ASSERT (s != NULL);
2088 if (s->_cooked_size != 0)
2089 dyn.d_un.d_val = s->_cooked_size;
2091 dyn.d_un.d_val = s->_raw_size;
2092 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2096 /* The procedure linkage table relocs (DT_JMPREL) should
2097 not be included in the overall relocs (DT_RELA).
2098 Therefore, we override the DT_RELASZ entry here to
2099 make it not include the JMPREL relocs. Since the
2100 linker script arranges for .rela.plt to follow all
2101 other relocation sections, we don't have to worry
2102 about changing the DT_RELA entry. */
2103 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2106 if (s->_cooked_size != 0)
2107 dyn.d_un.d_val -= s->_cooked_size;
2109 dyn.d_un.d_val -= s->_raw_size;
2111 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2116 /* Fill in the first entry in the procedure linkage table. */
2117 if (splt->_raw_size > 0)
2119 if (!CPU32_FLAG (output_bfd))
2121 memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE);
2122 bfd_put_32 (output_bfd,
2123 (sgot->output_section->vma
2124 + sgot->output_offset + 4
2125 - (splt->output_section->vma + 2)),
2126 splt->contents + 4);
2127 bfd_put_32 (output_bfd,
2128 (sgot->output_section->vma
2129 + sgot->output_offset + 8
2130 - (splt->output_section->vma + 10)),
2131 splt->contents + 12);
2132 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2137 memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE);
2138 bfd_put_32 (output_bfd,
2139 (sgot->output_section->vma
2140 + sgot->output_offset + 4
2141 - (splt->output_section->vma + 2)),
2142 splt->contents + 4);
2143 bfd_put_32 (output_bfd,
2144 (sgot->output_section->vma
2145 + sgot->output_offset + 8
2146 - (splt->output_section->vma + 10)),
2147 splt->contents + 10);
2148 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2149 = PLT_CPU32_ENTRY_SIZE;
2154 /* Fill in the first three entries in the global offset table. */
2155 if (sgot->_raw_size > 0)
2158 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2160 bfd_put_32 (output_bfd,
2161 sdyn->output_section->vma + sdyn->output_offset,
2163 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2164 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2167 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2172 #define TARGET_BIG_SYM bfd_elf32_m68k_vec
2173 #define TARGET_BIG_NAME "elf32-m68k"
2174 #define ELF_MACHINE_CODE EM_68K
2175 #define ELF_MAXPAGESIZE 0x2000
2176 #define elf_backend_create_dynamic_sections \
2177 _bfd_elf_create_dynamic_sections
2178 #define bfd_elf32_bfd_link_hash_table_create \
2179 elf_m68k_link_hash_table_create
2180 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
2182 #define elf_backend_check_relocs elf_m68k_check_relocs
2183 #define elf_backend_adjust_dynamic_symbol \
2184 elf_m68k_adjust_dynamic_symbol
2185 #define elf_backend_size_dynamic_sections \
2186 elf_m68k_size_dynamic_sections
2187 #define elf_backend_relocate_section elf_m68k_relocate_section
2188 #define elf_backend_finish_dynamic_symbol \
2189 elf_m68k_finish_dynamic_symbol
2190 #define elf_backend_finish_dynamic_sections \
2191 elf_m68k_finish_dynamic_sections
2192 #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
2193 #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook
2194 #define bfd_elf32_bfd_copy_private_bfd_data \
2195 elf32_m68k_copy_private_bfd_data
2196 #define bfd_elf32_bfd_merge_private_bfd_data \
2197 elf32_m68k_merge_private_bfd_data
2198 #define bfd_elf32_bfd_set_private_flags \
2199 elf32_m68k_set_private_flags
2200 #define bfd_elf32_bfd_print_private_bfd_data \
2201 elf32_m68k_print_private_bfd_data
2203 #define elf_backend_can_gc_sections 1
2204 #define elf_backend_want_got_plt 1
2205 #define elf_backend_plt_readonly 1
2206 #define elf_backend_want_plt_sym 0
2207 #define elf_backend_got_header_size 12
2209 #include "elf32-target.h"