Commit | Line | Data |
---|---|---|
30dc85f1 | 1 | /* Motorola 68k series support for 32-bit ELF |
6a1878c9 | 2 | Copyright 1993, 1995, 1996, 1997 Free Software Foundation, Inc. |
30dc85f1 ILT |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
943fbd5b | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
30dc85f1 ILT |
19 | |
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "bfdlink.h" | |
23 | #include "libbfd.h" | |
a0271667 | 24 | #include "elf-bfd.h" |
30dc85f1 ILT |
25 | |
26 | static reloc_howto_type *reloc_type_lookup | |
27 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
28 | static void rtype_to_howto | |
29 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
30 | static void rtype_to_howto_rel | |
31 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
6a1878c9 ILT |
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 *)); | |
30dc85f1 ILT |
36 | static boolean elf_m68k_check_relocs |
37 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
38 | const Elf_Internal_Rela *)); | |
39 | static boolean elf_m68k_adjust_dynamic_symbol | |
40 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
30dc85f1 ILT |
41 | static boolean elf_m68k_size_dynamic_sections |
42 | PARAMS ((bfd *, struct bfd_link_info *)); | |
43 | static boolean elf_m68k_relocate_section | |
44 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
45 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
46 | static boolean elf_m68k_finish_dynamic_symbol | |
47 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
48 | Elf_Internal_Sym *)); | |
49 | static boolean elf_m68k_finish_dynamic_sections | |
50 | PARAMS ((bfd *, struct bfd_link_info *)); | |
51 | ||
52 | /* elf32 m68k code, generated by elf.el */ | |
53 | enum reloc_type { | |
54 | R_68K_NONE = 0, | |
55 | R_68K_32 = 1, | |
56 | R_68K_16 = 2, | |
57 | R_68K_8 = 3, | |
58 | R_68K_PC32 = 4, | |
59 | R_68K_PC16 = 5, | |
60 | R_68K_PC8 = 6, | |
61 | R_68K_GOT32 = 7, | |
62 | R_68K_GOT16 = 8, | |
63 | R_68K_GOT8 = 9, | |
64 | R_68K_GOT32O = 10, | |
65 | R_68K_GOT16O = 11, | |
66 | R_68K_GOT8O = 12, | |
67 | R_68K_PLT32 = 13, | |
68 | R_68K_PLT16 = 14, | |
69 | R_68K_PLT8 = 15, | |
70 | R_68K_PLT32O = 16, | |
71 | R_68K_PLT16O = 17, | |
72 | R_68K_PLT8O = 18, | |
73 | R_68K_COPY = 19, | |
74 | R_68K_GLOB_DAT = 20, | |
75 | R_68K_JMP_SLOT = 21, | |
76 | R_68K_RELATIVE = 22, | |
77 | R_68K__max | |
78 | }; | |
79 | ||
80 | static reloc_howto_type howto_table[] = { | |
a0271667 ILT |
81 | HOWTO(R_68K_NONE, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", false, 0, 0x00000000,false), |
82 | HOWTO(R_68K_32, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", false, 0, 0xffffffff,false), | |
83 | HOWTO(R_68K_16, 0, 1,16, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", false, 0, 0x0000ffff,false), | |
84 | HOWTO(R_68K_8, 0, 0, 8, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", false, 0, 0x000000ff,false), | |
01da2d52 | 85 | HOWTO(R_68K_PC32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", false, 0, 0xffffffff,true), |
a0271667 ILT |
86 | HOWTO(R_68K_PC16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", false, 0, 0x0000ffff,true), |
87 | HOWTO(R_68K_PC8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", false, 0, 0x000000ff,true), | |
01da2d52 | 88 | HOWTO(R_68K_GOT32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", false, 0, 0xffffffff,true), |
a0271667 ILT |
89 | HOWTO(R_68K_GOT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", false, 0, 0x0000ffff,true), |
90 | HOWTO(R_68K_GOT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", false, 0, 0x000000ff,true), | |
01da2d52 | 91 | HOWTO(R_68K_GOT32O, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", false, 0, 0xffffffff,false), |
a0271667 ILT |
92 | HOWTO(R_68K_GOT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", false, 0, 0x0000ffff,false), |
93 | HOWTO(R_68K_GOT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", false, 0, 0x000000ff,false), | |
01da2d52 | 94 | HOWTO(R_68K_PLT32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", false, 0, 0xffffffff,true), |
a0271667 ILT |
95 | HOWTO(R_68K_PLT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", false, 0, 0x0000ffff,true), |
96 | HOWTO(R_68K_PLT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", false, 0, 0x000000ff,true), | |
01da2d52 | 97 | HOWTO(R_68K_PLT32O, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", false, 0, 0xffffffff,false), |
a0271667 ILT |
98 | HOWTO(R_68K_PLT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", false, 0, 0x0000ffff,false), |
99 | HOWTO(R_68K_PLT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", false, 0, 0x000000ff,false), | |
100 | HOWTO(R_68K_COPY, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", false, 0, 0xffffffff,false), | |
101 | 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), | |
102 | 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), | |
103 | HOWTO(R_68K_RELATIVE, 0, 2,32, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", false, 0, 0xffffffff,false), | |
30dc85f1 ILT |
104 | }; |
105 | ||
106 | static void | |
107 | rtype_to_howto (abfd, cache_ptr, dst) | |
108 | bfd *abfd; | |
109 | arelent *cache_ptr; | |
110 | Elf_Internal_Rela *dst; | |
111 | { | |
112 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K__max); | |
113 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
114 | } | |
115 | ||
116 | static void | |
117 | rtype_to_howto_rel (abfd, cache_ptr, dst) | |
118 | bfd *abfd; | |
119 | arelent *cache_ptr; | |
120 | Elf_Internal_Rel *dst; | |
121 | { | |
122 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K__max); | |
123 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
124 | } | |
125 | ||
126 | #define elf_info_to_howto rtype_to_howto | |
127 | #define elf_info_to_howto_rel rtype_to_howto_rel | |
128 | ||
129 | static const struct { unsigned char bfd_val, elf_val; } reloc_map[] = { | |
130 | { BFD_RELOC_NONE, R_68K_NONE }, | |
131 | { BFD_RELOC_32, R_68K_32 }, | |
132 | { BFD_RELOC_16, R_68K_16 }, | |
133 | { BFD_RELOC_8, R_68K_8 }, | |
134 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
135 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
136 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
137 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
138 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
139 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
140 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
141 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
142 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
143 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
144 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
145 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
146 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
147 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
148 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
149 | { BFD_RELOC_NONE, R_68K_COPY }, | |
150 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
151 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
152 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
153 | { BFD_RELOC_CTOR, R_68K_32 }, | |
154 | }; | |
155 | ||
156 | static reloc_howto_type * | |
157 | reloc_type_lookup (abfd, code) | |
158 | bfd *abfd; | |
159 | bfd_reloc_code_real_type code; | |
160 | { | |
a0271667 | 161 | unsigned int i; |
30dc85f1 ILT |
162 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) |
163 | { | |
164 | if (reloc_map[i].bfd_val == code) | |
165 | return &howto_table[(int) reloc_map[i].elf_val]; | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
170 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup | |
171 | #define ELF_ARCH bfd_arch_m68k | |
172 | /* end code generated by elf.el */ | |
173 | ||
174 | #define USE_RELA | |
175 | ||
176 | \f | |
177 | /* Functions for the m68k ELF linker. */ | |
178 | ||
179 | /* The name of the dynamic interpreter. This is put in the .interp | |
180 | section. */ | |
181 | ||
182 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
183 | ||
184 | /* The size in bytes of an entry in the procedure linkage table. */ | |
185 | ||
186 | #define PLT_ENTRY_SIZE 20 | |
187 | ||
188 | /* The first entry in a procedure linkage table looks like this. See | |
189 | the SVR4 ABI m68k supplement to see how this works. */ | |
190 | ||
191 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
192 | { | |
193 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
ff12f303 | 194 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ |
30dc85f1 | 195 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ |
ff12f303 | 196 | 0, 0, 0, 0, /* replaced with offset to .got + 8. */ |
30dc85f1 ILT |
197 | 0, 0, 0, 0 /* pad out to 20 bytes. */ |
198 | }; | |
199 | ||
200 | /* Subsequent entries in a procedure linkage table look like this. */ | |
201 | ||
202 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
203 | { | |
ff12f303 ILT |
204 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ |
205 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ | |
30dc85f1 ILT |
206 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
207 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
208 | 0x60, 0xff, /* bra.l .plt */ | |
209 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
210 | }; | |
211 | ||
6a1878c9 ILT |
212 | /* The m68k linker needs to keep track of the number of relocs that it |
213 | decides to copy in check_relocs for each symbol. This is so that it | |
214 | can discard PC relative relocs if it doesn't need them when linking | |
215 | with -Bsymbolic. We store the information in a field extending the | |
216 | regular ELF linker hash table. */ | |
217 | ||
218 | /* This structure keeps track of the number of PC relative relocs we have | |
219 | copied for a given symbol. */ | |
220 | ||
221 | struct elf_m68k_pcrel_relocs_copied | |
222 | { | |
223 | /* Next section. */ | |
224 | struct elf_m68k_pcrel_relocs_copied *next; | |
225 | /* A section in dynobj. */ | |
226 | asection *section; | |
227 | /* Number of relocs copied in this section. */ | |
228 | bfd_size_type count; | |
229 | }; | |
230 | ||
231 | /* m68k ELF linker hash entry. */ | |
232 | ||
233 | struct elf_m68k_link_hash_entry | |
234 | { | |
235 | struct elf_link_hash_entry root; | |
236 | ||
237 | /* Number of PC relative relocs copied for this symbol. */ | |
238 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
239 | }; | |
240 | ||
241 | /* m68k ELF linker hash table. */ | |
242 | ||
243 | struct elf_m68k_link_hash_table | |
244 | { | |
245 | struct elf_link_hash_table root; | |
246 | }; | |
247 | ||
248 | /* Declare this now that the above structures are defined. */ | |
249 | ||
250 | static boolean elf_m68k_discard_copies | |
251 | PARAMS ((struct elf_m68k_link_hash_entry *, PTR)); | |
252 | ||
253 | /* Traverse an m68k ELF linker hash table. */ | |
254 | ||
255 | #define elf_m68k_link_hash_traverse(table, func, info) \ | |
256 | (elf_link_hash_traverse \ | |
257 | (&(table)->root, \ | |
258 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
259 | (info))) | |
260 | ||
261 | /* Get the m68k ELF linker hash table from a link_info structure. */ | |
262 | ||
263 | #define elf_m68k_hash_table(p) \ | |
264 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
265 | ||
266 | /* Create an entry in an m68k ELF linker hash table. */ | |
267 | ||
268 | static struct bfd_hash_entry * | |
269 | elf_m68k_link_hash_newfunc (entry, table, string) | |
270 | struct bfd_hash_entry *entry; | |
271 | struct bfd_hash_table *table; | |
272 | const char *string; | |
273 | { | |
274 | struct elf_m68k_link_hash_entry *ret = | |
275 | (struct elf_m68k_link_hash_entry *) entry; | |
276 | ||
277 | /* Allocate the structure if it has not already been allocated by a | |
278 | subclass. */ | |
279 | if (ret == (struct elf_m68k_link_hash_entry *) NULL) | |
280 | ret = ((struct elf_m68k_link_hash_entry *) | |
281 | bfd_hash_allocate (table, | |
282 | sizeof (struct elf_m68k_link_hash_entry))); | |
283 | if (ret == (struct elf_m68k_link_hash_entry *) NULL) | |
284 | return (struct bfd_hash_entry *) ret; | |
285 | ||
286 | /* Call the allocation method of the superclass. */ | |
287 | ret = ((struct elf_m68k_link_hash_entry *) | |
288 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
289 | table, string)); | |
290 | if (ret != (struct elf_m68k_link_hash_entry *) NULL) | |
291 | { | |
292 | ret->pcrel_relocs_copied = NULL; | |
293 | } | |
294 | ||
295 | return (struct bfd_hash_entry *) ret; | |
296 | } | |
297 | ||
298 | /* Create an m68k ELF linker hash table. */ | |
299 | ||
300 | static struct bfd_link_hash_table * | |
301 | elf_m68k_link_hash_table_create (abfd) | |
302 | bfd *abfd; | |
303 | { | |
304 | struct elf_m68k_link_hash_table *ret; | |
305 | ||
306 | ret = ((struct elf_m68k_link_hash_table *) | |
307 | bfd_alloc (abfd, sizeof (struct elf_m68k_link_hash_table))); | |
308 | if (ret == (struct elf_m68k_link_hash_table *) NULL) | |
309 | return NULL; | |
310 | ||
311 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
312 | elf_m68k_link_hash_newfunc)) | |
313 | { | |
314 | bfd_release (abfd, ret); | |
315 | return NULL; | |
316 | } | |
317 | ||
318 | return &ret->root.root; | |
319 | } | |
320 | ||
30dc85f1 ILT |
321 | /* Look through the relocs for a section during the first phase, and |
322 | allocate space in the global offset table or procedure linkage | |
323 | table. */ | |
324 | ||
325 | static boolean | |
326 | elf_m68k_check_relocs (abfd, info, sec, relocs) | |
327 | bfd *abfd; | |
328 | struct bfd_link_info *info; | |
329 | asection *sec; | |
330 | const Elf_Internal_Rela *relocs; | |
331 | { | |
332 | bfd *dynobj; | |
333 | Elf_Internal_Shdr *symtab_hdr; | |
334 | struct elf_link_hash_entry **sym_hashes; | |
335 | bfd_vma *local_got_offsets; | |
336 | const Elf_Internal_Rela *rel; | |
337 | const Elf_Internal_Rela *rel_end; | |
338 | asection *sgot; | |
339 | asection *srelgot; | |
340 | asection *sreloc; | |
341 | ||
342 | if (info->relocateable) | |
343 | return true; | |
344 | ||
345 | dynobj = elf_hash_table (info)->dynobj; | |
346 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
347 | sym_hashes = elf_sym_hashes (abfd); | |
348 | local_got_offsets = elf_local_got_offsets (abfd); | |
349 | ||
350 | sgot = NULL; | |
351 | srelgot = NULL; | |
352 | sreloc = NULL; | |
353 | ||
354 | rel_end = relocs + sec->reloc_count; | |
355 | for (rel = relocs; rel < rel_end; rel++) | |
356 | { | |
a0271667 | 357 | unsigned long r_symndx; |
30dc85f1 ILT |
358 | struct elf_link_hash_entry *h; |
359 | ||
360 | r_symndx = ELF32_R_SYM (rel->r_info); | |
361 | ||
362 | if (r_symndx < symtab_hdr->sh_info) | |
363 | h = NULL; | |
364 | else | |
365 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
366 | ||
367 | switch (ELF32_R_TYPE (rel->r_info)) | |
368 | { | |
369 | case R_68K_GOT8: | |
370 | case R_68K_GOT16: | |
371 | case R_68K_GOT32: | |
ff12f303 ILT |
372 | if (h != NULL |
373 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
374 | break; | |
375 | /* Fall through. */ | |
30dc85f1 ILT |
376 | case R_68K_GOT8O: |
377 | case R_68K_GOT16O: | |
378 | case R_68K_GOT32O: | |
379 | /* This symbol requires a global offset table entry. */ | |
380 | ||
30dc85f1 ILT |
381 | if (dynobj == NULL) |
382 | { | |
383 | /* Create the .got section. */ | |
384 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
ede4eed4 | 385 | if (!_bfd_elf_create_got_section (dynobj, info)) |
30dc85f1 ILT |
386 | return false; |
387 | } | |
388 | ||
389 | if (sgot == NULL) | |
390 | { | |
391 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
392 | BFD_ASSERT (sgot != NULL); | |
393 | } | |
394 | ||
395 | if (srelgot == NULL | |
396 | && (h != NULL || info->shared)) | |
397 | { | |
398 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
399 | if (srelgot == NULL) | |
400 | { | |
401 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
402 | if (srelgot == NULL | |
403 | || !bfd_set_section_flags (dynobj, srelgot, | |
404 | (SEC_ALLOC | |
405 | | SEC_LOAD | |
406 | | SEC_HAS_CONTENTS | |
407 | | SEC_IN_MEMORY | |
ff12f303 | 408 | | SEC_LINKER_CREATED |
30dc85f1 ILT |
409 | | SEC_READONLY)) |
410 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
411 | return false; | |
412 | } | |
413 | } | |
414 | ||
415 | if (h != NULL) | |
416 | { | |
417 | if (h->got_offset != (bfd_vma) -1) | |
418 | { | |
419 | /* We have already allocated space in the .got. */ | |
420 | break; | |
421 | } | |
422 | h->got_offset = sgot->_raw_size; | |
423 | ||
424 | /* Make sure this symbol is output as a dynamic symbol. */ | |
425 | if (h->dynindx == -1) | |
426 | { | |
427 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
428 | return false; | |
429 | } | |
430 | ||
431 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
432 | } | |
433 | else | |
434 | { | |
435 | /* This is a global offset table entry for a local | |
436 | symbol. */ | |
437 | if (local_got_offsets == NULL) | |
438 | { | |
439 | size_t size; | |
a0271667 | 440 | register unsigned int i; |
30dc85f1 ILT |
441 | |
442 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
443 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
444 | if (local_got_offsets == NULL) | |
a0271667 | 445 | return false; |
30dc85f1 ILT |
446 | elf_local_got_offsets (abfd) = local_got_offsets; |
447 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
448 | local_got_offsets[i] = (bfd_vma) -1; | |
449 | } | |
450 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) | |
451 | { | |
452 | /* We have already allocated space in the .got. */ | |
453 | break; | |
454 | } | |
455 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
456 | ||
457 | if (info->shared) | |
458 | { | |
459 | /* If we are generating a shared object, we need to | |
460 | output a R_68K_RELATIVE reloc so that the dynamic | |
461 | linker can adjust this GOT entry. */ | |
462 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
463 | } | |
464 | } | |
465 | ||
466 | sgot->_raw_size += 4; | |
467 | break; | |
468 | ||
469 | case R_68K_PLT8: | |
470 | case R_68K_PLT16: | |
471 | case R_68K_PLT32: | |
30dc85f1 ILT |
472 | /* This symbol requires a procedure linkage table entry. We |
473 | actually build the entry in adjust_dynamic_symbol, | |
ff12f303 ILT |
474 | because this might be a case of linking PIC code which is |
475 | never referenced by a dynamic object, in which case we | |
476 | don't need to generate a procedure linkage table entry | |
477 | after all. */ | |
478 | ||
30dc85f1 ILT |
479 | /* If this is a local symbol, we resolve it directly without |
480 | creating a procedure linkage table entry. */ | |
481 | if (h == NULL) | |
482 | continue; | |
483 | ||
ff12f303 ILT |
484 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
485 | break; | |
486 | ||
487 | case R_68K_PLT8O: | |
488 | case R_68K_PLT16O: | |
489 | case R_68K_PLT32O: | |
490 | /* This symbol requires a procedure linkage table entry. */ | |
491 | ||
492 | if (h == NULL) | |
493 | { | |
494 | /* It does not make sense to have this relocation for a | |
495 | local symbol. FIXME: does it? How to handle it if | |
496 | it does make sense? */ | |
497 | bfd_set_error (bfd_error_bad_value); | |
498 | return false; | |
499 | } | |
500 | ||
30dc85f1 ILT |
501 | /* Make sure this symbol is output as a dynamic symbol. */ |
502 | if (h->dynindx == -1) | |
503 | { | |
504 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
505 | return false; | |
506 | } | |
507 | ||
508 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
509 | break; | |
510 | ||
30dc85f1 ILT |
511 | case R_68K_PC8: |
512 | case R_68K_PC16: | |
513 | case R_68K_PC32: | |
6a1878c9 ILT |
514 | /* If we are creating a shared library and this is not a local |
515 | symbol, we need to copy the reloc into the shared library. | |
516 | However when linking with -Bsymbolic and this is a global | |
517 | symbol which is defined in an object we are including in the | |
518 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
519 | reloc directly. At this point we have not seen all the input | |
520 | files, so it is possible that DEF_REGULAR is not set now but | |
521 | will be set later (it is never cleared). We account for that | |
522 | possibility below by storing information in the | |
523 | pcrel_relocs_copied field of the hash table entry. */ | |
524 | if (!(info->shared | |
525 | && (sec->flags & SEC_ALLOC) != 0 | |
526 | && h != NULL | |
527 | && (!info->symbolic | |
528 | || (h->elf_link_hash_flags | |
529 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a0271667 ILT |
530 | break; |
531 | /* Fall through. */ | |
532 | case R_68K_8: | |
533 | case R_68K_16: | |
534 | case R_68K_32: | |
6a1878c9 ILT |
535 | /* If we are creating a shared library, we need to copy the |
536 | reloc into the shared library. */ | |
30dc85f1 | 537 | if (info->shared |
6a1878c9 | 538 | && (sec->flags & SEC_ALLOC) != 0) |
30dc85f1 ILT |
539 | { |
540 | /* When creating a shared object, we must copy these | |
541 | reloc types into the output file. We create a reloc | |
542 | section in dynobj and make room for this reloc. */ | |
543 | if (sreloc == NULL) | |
544 | { | |
545 | const char *name; | |
546 | ||
ede4eed4 | 547 | name = (bfd_elf_string_from_elf_section |
30dc85f1 ILT |
548 | (abfd, |
549 | elf_elfheader (abfd)->e_shstrndx, | |
550 | elf_section_data (sec)->rel_hdr.sh_name)); | |
551 | if (name == NULL) | |
552 | return false; | |
553 | ||
554 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
555 | && strcmp (bfd_get_section_name (abfd, sec), | |
556 | name + 5) == 0); | |
557 | ||
558 | sreloc = bfd_get_section_by_name (dynobj, name); | |
559 | if (sreloc == NULL) | |
560 | { | |
561 | sreloc = bfd_make_section (dynobj, name); | |
562 | if (sreloc == NULL | |
563 | || !bfd_set_section_flags (dynobj, sreloc, | |
564 | (SEC_ALLOC | |
565 | | SEC_LOAD | |
566 | | SEC_HAS_CONTENTS | |
567 | | SEC_IN_MEMORY | |
ff12f303 | 568 | | SEC_LINKER_CREATED |
30dc85f1 ILT |
569 | | SEC_READONLY)) |
570 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) | |
571 | return false; | |
572 | } | |
573 | } | |
574 | ||
575 | sreloc->_raw_size += sizeof (Elf32_External_Rela); | |
6a1878c9 ILT |
576 | |
577 | /* If we are linking with -Bsymbolic, we count the number of | |
578 | PC relative relocations we have entered for this symbol, | |
579 | so that we can discard them again if the symbol is later | |
580 | defined by a regular object. Note that this function is | |
581 | only called if we are using an m68kelf linker hash table, | |
582 | which means that h is really a pointer to an | |
583 | elf_m68k_link_hash_entry. */ | |
584 | if ((ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
585 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
586 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
587 | && info->symbolic) | |
588 | { | |
589 | struct elf_m68k_link_hash_entry *eh; | |
590 | struct elf_m68k_pcrel_relocs_copied *p; | |
591 | ||
592 | eh = (struct elf_m68k_link_hash_entry *) h; | |
593 | ||
594 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
595 | if (p->section == sreloc) | |
596 | break; | |
597 | ||
598 | if (p == NULL) | |
599 | { | |
600 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
601 | bfd_alloc (dynobj, sizeof *p)); | |
602 | if (p == NULL) | |
603 | return false; | |
604 | p->next = eh->pcrel_relocs_copied; | |
605 | eh->pcrel_relocs_copied = p; | |
606 | p->section = sreloc; | |
607 | p->count = 0; | |
608 | } | |
609 | ||
610 | ++p->count; | |
611 | } | |
30dc85f1 ILT |
612 | } |
613 | ||
614 | break; | |
615 | ||
616 | default: | |
617 | break; | |
618 | } | |
619 | } | |
620 | ||
621 | return true; | |
622 | } | |
623 | ||
624 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
625 | regular object. The current definition is in some section of the | |
626 | dynamic object, but we're not including those sections. We have to | |
627 | change the definition to something the rest of the link can | |
628 | understand. */ | |
629 | ||
630 | static boolean | |
631 | elf_m68k_adjust_dynamic_symbol (info, h) | |
632 | struct bfd_link_info *info; | |
633 | struct elf_link_hash_entry *h; | |
634 | { | |
635 | bfd *dynobj; | |
636 | asection *s; | |
637 | unsigned int power_of_two; | |
638 | ||
639 | dynobj = elf_hash_table (info)->dynobj; | |
640 | ||
641 | /* Make sure we know what is going on here. */ | |
3004a68c ILT |
642 | BFD_ASSERT (dynobj != NULL |
643 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
a0271667 | 644 | || h->weakdef != NULL |
3004a68c ILT |
645 | || ((h->elf_link_hash_flags |
646 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
647 | && (h->elf_link_hash_flags | |
648 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
649 | && (h->elf_link_hash_flags | |
650 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
30dc85f1 ILT |
651 | |
652 | /* If this is a function, put it in the procedure linkage table. We | |
653 | will fill in the contents of the procedure linkage table later, | |
654 | when we know the address of the .got section. */ | |
655 | if (h->type == STT_FUNC | |
656 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
657 | { | |
ff12f303 ILT |
658 | if (! info->shared |
659 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
660 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 | |
661 | /* We must always create the plt entry if it was referenced | |
662 | by a PLTxxO relocation. In this case we already recorded | |
663 | it as a dynamic symbol. */ | |
664 | && h->dynindx == -1) | |
30dc85f1 | 665 | { |
ff12f303 ILT |
666 | /* This case can occur if we saw a PLTxx reloc in an input |
667 | file, but the symbol was never referred to by a dynamic | |
668 | object. In such a case, we don't actually need to build | |
669 | a procedure linkage table, and we can just do a PCxx | |
670 | reloc instead. */ | |
30dc85f1 ILT |
671 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
672 | return true; | |
673 | } | |
674 | ||
ff12f303 ILT |
675 | /* Make sure this symbol is output as a dynamic symbol. */ |
676 | if (h->dynindx == -1) | |
677 | { | |
678 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
679 | return false; | |
680 | } | |
681 | ||
30dc85f1 ILT |
682 | s = bfd_get_section_by_name (dynobj, ".plt"); |
683 | BFD_ASSERT (s != NULL); | |
684 | ||
685 | /* If this is the first .plt entry, make room for the special | |
686 | first entry. */ | |
687 | if (s->_raw_size == 0) | |
688 | s->_raw_size += PLT_ENTRY_SIZE; | |
689 | ||
690 | /* If this symbol is not defined in a regular file, and we are | |
691 | not generating a shared library, then set the symbol to this | |
692 | location in the .plt. This is required to make function | |
693 | pointers compare as equal between the normal executable and | |
694 | the shared library. */ | |
695 | if (!info->shared | |
696 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
697 | { | |
698 | h->root.u.def.section = s; | |
699 | h->root.u.def.value = s->_raw_size; | |
700 | } | |
701 | ||
702 | h->plt_offset = s->_raw_size; | |
703 | ||
704 | /* Make room for this entry. */ | |
705 | s->_raw_size += PLT_ENTRY_SIZE; | |
706 | ||
707 | /* We also need to make an entry in the .got.plt section, which | |
708 | will be placed in the .got section by the linker script. */ | |
709 | ||
710 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
711 | BFD_ASSERT (s != NULL); | |
712 | s->_raw_size += 4; | |
713 | ||
714 | /* We also need to make an entry in the .rela.plt section. */ | |
715 | ||
716 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
717 | BFD_ASSERT (s != NULL); | |
718 | s->_raw_size += sizeof (Elf32_External_Rela); | |
719 | ||
720 | return true; | |
721 | } | |
722 | ||
723 | /* If this is a weak symbol, and there is a real definition, the | |
724 | processor independent code will have arranged for us to see the | |
725 | real definition first, and we can just use the same value. */ | |
726 | if (h->weakdef != NULL) | |
727 | { | |
728 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
729 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
730 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
731 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
732 | return true; | |
733 | } | |
734 | ||
735 | /* This is a reference to a symbol defined by a dynamic object which | |
736 | is not a function. */ | |
737 | ||
738 | /* If we are creating a shared library, we must presume that the | |
739 | only references to the symbol are via the global offset table. | |
740 | For such cases we need not do anything here; the relocations will | |
741 | be handled correctly by relocate_section. */ | |
742 | if (info->shared) | |
743 | return true; | |
744 | ||
745 | /* We must allocate the symbol in our .dynbss section, which will | |
746 | become part of the .bss section of the executable. There will be | |
747 | an entry for this symbol in the .dynsym section. The dynamic | |
748 | object will contain position independent code, so all references | |
749 | from the dynamic object to this symbol will go through the global | |
750 | offset table. The dynamic linker will use the .dynsym entry to | |
751 | determine the address it must put in the global offset table, so | |
752 | both the dynamic object and the regular object will refer to the | |
753 | same memory location for the variable. */ | |
754 | ||
755 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
756 | BFD_ASSERT (s != NULL); | |
757 | ||
6a1878c9 ILT |
758 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to |
759 | copy the initial value out of the dynamic object and into the | |
760 | runtime process image. We need to remember the offset into the | |
761 | .rela.bss section we are going to use. */ | |
762 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
30dc85f1 ILT |
763 | { |
764 | asection *srel; | |
765 | ||
766 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
767 | BFD_ASSERT (srel != NULL); | |
768 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
769 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
770 | } | |
771 | ||
772 | /* We need to figure out the alignment required for this symbol. I | |
773 | have no idea how ELF linkers handle this. */ | |
774 | power_of_two = bfd_log2 (h->size); | |
775 | if (power_of_two > 3) | |
776 | power_of_two = 3; | |
777 | ||
778 | /* Apply the required alignment. */ | |
779 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
780 | (bfd_size_type) (1 << power_of_two)); | |
781 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
782 | { | |
783 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
784 | return false; | |
785 | } | |
786 | ||
787 | /* Define the symbol as being at this point in the section. */ | |
788 | h->root.u.def.section = s; | |
789 | h->root.u.def.value = s->_raw_size; | |
790 | ||
791 | /* Increment the section size to make room for the symbol. */ | |
792 | s->_raw_size += h->size; | |
793 | ||
794 | return true; | |
795 | } | |
796 | ||
797 | /* Set the sizes of the dynamic sections. */ | |
798 | ||
799 | static boolean | |
800 | elf_m68k_size_dynamic_sections (output_bfd, info) | |
801 | bfd *output_bfd; | |
802 | struct bfd_link_info *info; | |
803 | { | |
804 | bfd *dynobj; | |
805 | asection *s; | |
806 | boolean plt; | |
807 | boolean relocs; | |
808 | boolean reltext; | |
809 | ||
810 | dynobj = elf_hash_table (info)->dynobj; | |
811 | BFD_ASSERT (dynobj != NULL); | |
812 | ||
813 | if (elf_hash_table (info)->dynamic_sections_created) | |
814 | { | |
815 | /* Set the contents of the .interp section to the interpreter. */ | |
816 | if (!info->shared) | |
817 | { | |
818 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
819 | BFD_ASSERT (s != NULL); | |
820 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
821 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
822 | } | |
823 | } | |
824 | else | |
825 | { | |
826 | /* We may have created entries in the .rela.got section. | |
827 | However, if we are not creating the dynamic sections, we will | |
828 | not actually use these entries. Reset the size of .rela.got, | |
829 | which will cause it to get stripped from the output file | |
830 | below. */ | |
831 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
832 | if (s != NULL) | |
833 | s->_raw_size = 0; | |
834 | } | |
835 | ||
6a1878c9 ILT |
836 | /* If this is a -Bsymbolic shared link, then we need to discard all PC |
837 | relative relocs against symbols defined in a regular object. We | |
838 | allocated space for them in the check_relocs routine, but we will not | |
839 | fill them in in the relocate_section routine. */ | |
840 | if (info->shared && info->symbolic) | |
841 | elf_m68k_link_hash_traverse (elf_m68k_hash_table (info), | |
842 | elf_m68k_discard_copies, | |
843 | (PTR) NULL); | |
844 | ||
30dc85f1 ILT |
845 | /* The check_relocs and adjust_dynamic_symbol entry points have |
846 | determined the sizes of the various dynamic sections. Allocate | |
847 | memory for them. */ | |
848 | plt = false; | |
849 | relocs = false; | |
850 | reltext = false; | |
851 | for (s = dynobj->sections; s != NULL; s = s->next) | |
852 | { | |
853 | const char *name; | |
854 | boolean strip; | |
855 | ||
ff12f303 | 856 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
30dc85f1 ILT |
857 | continue; |
858 | ||
859 | /* It's OK to base decisions on the section name, because none | |
860 | of the dynobj section names depend upon the input files. */ | |
861 | name = bfd_get_section_name (dynobj, s); | |
862 | ||
863 | strip = false; | |
864 | ||
865 | if (strcmp (name, ".plt") == 0) | |
866 | { | |
867 | if (s->_raw_size == 0) | |
868 | { | |
869 | /* Strip this section if we don't need it; see the | |
870 | comment below. */ | |
871 | strip = true; | |
872 | } | |
873 | else | |
874 | { | |
875 | /* Remember whether there is a PLT. */ | |
876 | plt = true; | |
877 | } | |
878 | } | |
879 | else if (strncmp (name, ".rela", 5) == 0) | |
880 | { | |
881 | if (s->_raw_size == 0) | |
882 | { | |
883 | /* If we don't need this section, strip it from the | |
884 | output file. This is mostly to handle .rela.bss and | |
885 | .rela.plt. We must create both sections in | |
886 | create_dynamic_sections, because they must be created | |
887 | before the linker maps input sections to output | |
888 | sections. The linker does that before | |
889 | adjust_dynamic_symbol is called, and it is that | |
890 | function which decides whether anything needs to go | |
891 | into these sections. */ | |
892 | strip = true; | |
893 | } | |
894 | else | |
895 | { | |
896 | asection *target; | |
897 | ||
898 | /* Remember whether there are any reloc sections other | |
899 | than .rela.plt. */ | |
900 | if (strcmp (name, ".rela.plt") != 0) | |
901 | { | |
6a1878c9 ILT |
902 | const char *outname; |
903 | ||
30dc85f1 ILT |
904 | relocs = true; |
905 | ||
906 | /* If this relocation section applies to a read only | |
907 | section, then we probably need a DT_TEXTREL | |
908 | entry. .rela.plt is actually associated with | |
909 | .got.plt, which is never readonly. */ | |
6a1878c9 ILT |
910 | outname = bfd_get_section_name (output_bfd, |
911 | s->output_section); | |
912 | target = bfd_get_section_by_name (output_bfd, outname + 5); | |
30dc85f1 ILT |
913 | if (target != NULL |
914 | && (target->flags & SEC_READONLY) != 0) | |
915 | reltext = true; | |
916 | } | |
917 | ||
918 | /* We use the reloc_count field as a counter if we need | |
919 | to copy relocs into the output file. */ | |
920 | s->reloc_count = 0; | |
921 | } | |
922 | } | |
923 | else if (strncmp (name, ".got", 4) != 0) | |
924 | { | |
925 | /* It's not one of our sections, so don't allocate space. */ | |
926 | continue; | |
927 | } | |
928 | ||
929 | if (strip) | |
930 | { | |
931 | asection **spp; | |
932 | ||
933 | for (spp = &s->output_section->owner->sections; | |
934 | *spp != s->output_section; | |
935 | spp = &(*spp)->next) | |
936 | ; | |
937 | *spp = s->output_section->next; | |
938 | --s->output_section->owner->section_count; | |
939 | ||
940 | continue; | |
941 | } | |
942 | ||
943 | /* Allocate memory for the section contents. */ | |
944 | s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); | |
945 | if (s->contents == NULL && s->_raw_size != 0) | |
a0271667 | 946 | return false; |
30dc85f1 ILT |
947 | } |
948 | ||
949 | if (elf_hash_table (info)->dynamic_sections_created) | |
950 | { | |
951 | /* Add some entries to the .dynamic section. We fill in the | |
952 | values later, in elf_m68k_finish_dynamic_sections, but we | |
953 | must add the entries now so that we get the correct size for | |
954 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
955 | dynamic linker and used by the debugger. */ | |
956 | if (!info->shared) | |
957 | { | |
958 | if (!bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
959 | return false; | |
960 | } | |
961 | ||
962 | if (plt) | |
963 | { | |
964 | if (!bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
965 | || !bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
966 | || !bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
967 | || !bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
968 | return false; | |
969 | } | |
970 | ||
971 | if (relocs) | |
972 | { | |
973 | if (!bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) | |
974 | || !bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) | |
975 | || !bfd_elf32_add_dynamic_entry (info, DT_RELAENT, | |
976 | sizeof (Elf32_External_Rela))) | |
977 | return false; | |
978 | } | |
979 | ||
980 | if (reltext) | |
981 | { | |
982 | if (!bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
983 | return false; | |
984 | } | |
985 | } | |
986 | ||
30dc85f1 ILT |
987 | return true; |
988 | } | |
989 | ||
6a1878c9 ILT |
990 | /* This function is called via elf_m68k_link_hash_traverse if we are |
991 | creating a shared object with -Bsymbolic. It discards the space | |
992 | allocated to copy PC relative relocs against symbols which are defined | |
993 | in regular objects. We allocated space for them in the check_relocs | |
994 | routine, but we won't fill them in in the relocate_section routine. */ | |
995 | ||
996 | /*ARGSUSED*/ | |
997 | static boolean | |
998 | elf_m68k_discard_copies (h, ignore) | |
999 | struct elf_m68k_link_hash_entry *h; | |
1000 | PTR ignore; | |
1001 | { | |
1002 | struct elf_m68k_pcrel_relocs_copied *s; | |
1003 | ||
1004 | /* We only discard relocs for symbols defined in a regular object. */ | |
1005 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1006 | return true; | |
1007 | ||
1008 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1009 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela); | |
1010 | ||
1011 | return true; | |
1012 | } | |
1013 | ||
30dc85f1 ILT |
1014 | /* Relocate an M68K ELF section. */ |
1015 | ||
1016 | static boolean | |
1017 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, | |
1018 | contents, relocs, local_syms, local_sections) | |
1019 | bfd *output_bfd; | |
1020 | struct bfd_link_info *info; | |
1021 | bfd *input_bfd; | |
1022 | asection *input_section; | |
1023 | bfd_byte *contents; | |
1024 | Elf_Internal_Rela *relocs; | |
1025 | Elf_Internal_Sym *local_syms; | |
1026 | asection **local_sections; | |
1027 | { | |
1028 | bfd *dynobj; | |
1029 | Elf_Internal_Shdr *symtab_hdr; | |
1030 | struct elf_link_hash_entry **sym_hashes; | |
1031 | bfd_vma *local_got_offsets; | |
1032 | asection *sgot; | |
30dc85f1 ILT |
1033 | asection *splt; |
1034 | asection *sreloc; | |
1035 | Elf_Internal_Rela *rel; | |
1036 | Elf_Internal_Rela *relend; | |
1037 | ||
1038 | dynobj = elf_hash_table (info)->dynobj; | |
1039 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1040 | sym_hashes = elf_sym_hashes (input_bfd); | |
1041 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1042 | ||
1043 | sgot = NULL; | |
30dc85f1 ILT |
1044 | splt = NULL; |
1045 | sreloc = NULL; | |
1046 | ||
1047 | rel = relocs; | |
1048 | relend = relocs + input_section->reloc_count; | |
1049 | for (; rel < relend; rel++) | |
1050 | { | |
1051 | int r_type; | |
1052 | reloc_howto_type *howto; | |
a0271667 | 1053 | unsigned long r_symndx; |
30dc85f1 ILT |
1054 | struct elf_link_hash_entry *h; |
1055 | Elf_Internal_Sym *sym; | |
1056 | asection *sec; | |
1057 | bfd_vma relocation; | |
1058 | bfd_reloc_status_type r; | |
1059 | ||
1060 | r_type = ELF32_R_TYPE (rel->r_info); | |
1061 | if (r_type < 0 || r_type >= (int) R_68K__max) | |
1062 | { | |
1063 | bfd_set_error (bfd_error_bad_value); | |
1064 | return false; | |
1065 | } | |
1066 | howto = howto_table + r_type; | |
1067 | ||
1068 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1069 | ||
1070 | if (info->relocateable) | |
1071 | { | |
1072 | /* This is a relocateable link. We don't have to change | |
1073 | anything, unless the reloc is against a section symbol, | |
1074 | in which case we have to adjust according to where the | |
1075 | section symbol winds up in the output section. */ | |
1076 | if (r_symndx < symtab_hdr->sh_info) | |
1077 | { | |
1078 | sym = local_syms + r_symndx; | |
1079 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1080 | { | |
1081 | sec = local_sections[r_symndx]; | |
1082 | rel->r_addend += sec->output_offset + sym->st_value; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | continue; | |
1087 | } | |
1088 | ||
1089 | /* This is a final link. */ | |
1090 | h = NULL; | |
1091 | sym = NULL; | |
1092 | sec = NULL; | |
1093 | if (r_symndx < symtab_hdr->sh_info) | |
1094 | { | |
1095 | sym = local_syms + r_symndx; | |
1096 | sec = local_sections[r_symndx]; | |
1097 | relocation = (sec->output_section->vma | |
1098 | + sec->output_offset | |
1099 | + sym->st_value); | |
1100 | } | |
1101 | else | |
1102 | { | |
1103 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
cf5138e3 ILT |
1104 | while (h->root.type == bfd_link_hash_indirect |
1105 | || h->root.type == bfd_link_hash_warning) | |
1106 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
30dc85f1 ILT |
1107 | if (h->root.type == bfd_link_hash_defined |
1108 | || h->root.type == bfd_link_hash_defweak) | |
1109 | { | |
1110 | sec = h->root.u.def.section; | |
1111 | if (((r_type == R_68K_PLT8 | |
1112 | || r_type == R_68K_PLT16 | |
1113 | || r_type == R_68K_PLT32 | |
1114 | || r_type == R_68K_PLT8O | |
1115 | || r_type == R_68K_PLT16O | |
1116 | || r_type == R_68K_PLT32O) | |
1117 | && h->plt_offset != (bfd_vma) -1) | |
1118 | || ((r_type == R_68K_GOT8O | |
1119 | || r_type == R_68K_GOT16O | |
1120 | || r_type == R_68K_GOT32O | |
1121 | || ((r_type == R_68K_GOT8 | |
1122 | || r_type == R_68K_GOT16 | |
1123 | || r_type == R_68K_GOT32) | |
1124 | && strcmp (h->root.root.string, | |
1125 | "_GLOBAL_OFFSET_TABLE_") != 0)) | |
a0271667 ILT |
1126 | && elf_hash_table (info)->dynamic_sections_created |
1127 | && (! info->shared | |
8519ea21 | 1128 | || (! info->symbolic && h->dynindx != -1) |
a0271667 ILT |
1129 | || (h->elf_link_hash_flags |
1130 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
30dc85f1 | 1131 | || (info->shared |
6a1878c9 | 1132 | && ((! info->symbolic && h->dynindx != -1) |
53787b23 ILT |
1133 | || (h->elf_link_hash_flags |
1134 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
30dc85f1 ILT |
1135 | && (input_section->flags & SEC_ALLOC) != 0 |
1136 | && (r_type == R_68K_8 | |
1137 | || r_type == R_68K_16 | |
1138 | || r_type == R_68K_32 | |
1139 | || r_type == R_68K_PC8 | |
1140 | || r_type == R_68K_PC16 | |
1141 | || r_type == R_68K_PC32))) | |
1142 | { | |
1143 | /* In these cases, we don't need the relocation | |
1144 | value. We check specially because in some | |
1145 | obscure cases sec->output_section will be NULL. */ | |
1146 | relocation = 0; | |
1147 | } | |
1148 | else | |
1149 | relocation = (h->root.u.def.value | |
1150 | + sec->output_section->vma | |
1151 | + sec->output_offset); | |
1152 | } | |
1153 | else if (h->root.type == bfd_link_hash_undefweak) | |
1154 | relocation = 0; | |
a0271667 | 1155 | else if (info->shared && !info->symbolic) |
30dc85f1 ILT |
1156 | relocation = 0; |
1157 | else | |
1158 | { | |
1159 | if (!(info->callbacks->undefined_symbol | |
1160 | (info, h->root.root.string, input_bfd, | |
1161 | input_section, rel->r_offset))) | |
1162 | return false; | |
1163 | relocation = 0; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | switch (r_type) | |
1168 | { | |
1169 | case R_68K_GOT8: | |
1170 | case R_68K_GOT16: | |
1171 | case R_68K_GOT32: | |
ff12f303 ILT |
1172 | /* Relocation is to the address of the entry for this symbol |
1173 | in the global offset table. */ | |
30dc85f1 ILT |
1174 | if (h != NULL |
1175 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1176 | break; | |
1177 | /* Fall through. */ | |
1178 | case R_68K_GOT8O: | |
1179 | case R_68K_GOT16O: | |
1180 | case R_68K_GOT32O: | |
1181 | /* Relocation is the offset of the entry for this symbol in | |
1182 | the global offset table. */ | |
1183 | ||
ff12f303 ILT |
1184 | { |
1185 | bfd_vma off; | |
30dc85f1 | 1186 | |
ff12f303 ILT |
1187 | if (sgot == NULL) |
1188 | { | |
1189 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1190 | BFD_ASSERT (sgot != NULL); | |
1191 | } | |
30dc85f1 | 1192 | |
ff12f303 ILT |
1193 | if (h != NULL) |
1194 | { | |
1195 | off = h->got_offset; | |
1196 | BFD_ASSERT (off != (bfd_vma) -1); | |
30dc85f1 | 1197 | |
ff12f303 ILT |
1198 | if (!elf_hash_table (info)->dynamic_sections_created |
1199 | || (info->shared | |
8519ea21 | 1200 | && (info->symbolic || h->dynindx == -1) |
ff12f303 ILT |
1201 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
1202 | { | |
1203 | /* This is actually a static link, or it is a | |
1204 | -Bsymbolic link and the symbol is defined | |
8519ea21 ILT |
1205 | locally, or the symbol was forced to be local |
1206 | because of a version file.. We must initialize | |
1207 | this entry in the global offset table. Since | |
1208 | the offset must always be a multiple of 4, we | |
1209 | use the least significant bit to record whether | |
1210 | we have initialized it already. | |
ff12f303 ILT |
1211 | |
1212 | When doing a dynamic link, we create a .rela.got | |
1213 | relocation entry to initialize the value. This | |
1214 | is done in the finish_dynamic_symbol routine. */ | |
1215 | if ((off & 1) != 0) | |
1216 | off &= ~1; | |
1217 | else | |
1218 | { | |
1219 | bfd_put_32 (output_bfd, relocation, | |
1220 | sgot->contents + off); | |
1221 | h->got_offset |= 1; | |
1222 | } | |
1223 | } | |
1224 | } | |
1225 | else | |
1226 | { | |
1227 | BFD_ASSERT (local_got_offsets != NULL | |
1228 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
30dc85f1 | 1229 | |
ff12f303 | 1230 | off = local_got_offsets[r_symndx]; |
30dc85f1 | 1231 | |
ff12f303 ILT |
1232 | /* The offset must always be a multiple of 4. We use |
1233 | the least significant bit to record whether we have | |
1234 | already generated the necessary reloc. */ | |
1235 | if ((off & 1) != 0) | |
1236 | off &= ~1; | |
1237 | else | |
1238 | { | |
1239 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1240 | ||
1241 | if (info->shared) | |
1242 | { | |
1243 | asection *srelgot; | |
1244 | Elf_Internal_Rela outrel; | |
1245 | ||
1246 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1247 | BFD_ASSERT (srelgot != NULL); | |
1248 | ||
1249 | outrel.r_offset = (sgot->output_section->vma | |
1250 | + sgot->output_offset | |
1251 | + off); | |
1252 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1253 | outrel.r_addend = relocation; | |
1254 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1255 | (((Elf32_External_Rela *) | |
1256 | srelgot->contents) | |
1257 | + srelgot->reloc_count)); | |
1258 | ++srelgot->reloc_count; | |
1259 | } | |
1260 | ||
1261 | local_got_offsets[r_symndx] |= 1; | |
1262 | } | |
1263 | } | |
30dc85f1 | 1264 | |
ff12f303 ILT |
1265 | relocation = sgot->output_offset + off; |
1266 | if (r_type == R_68K_GOT8O | |
1267 | || r_type == R_68K_GOT16O | |
1268 | || r_type == R_68K_GOT32O) | |
1269 | { | |
1270 | /* This relocation does not use the addend. */ | |
1271 | rel->r_addend = 0; | |
1272 | } | |
1273 | else | |
1274 | relocation += sgot->output_section->vma; | |
1275 | } | |
30dc85f1 ILT |
1276 | break; |
1277 | ||
1278 | case R_68K_PLT8: | |
1279 | case R_68K_PLT16: | |
1280 | case R_68K_PLT32: | |
1281 | /* Relocation is to the entry for this symbol in the | |
1282 | procedure linkage table. */ | |
1283 | ||
ff12f303 | 1284 | /* Resolve a PLTxx reloc against a local symbol directly, |
30dc85f1 ILT |
1285 | without using the procedure linkage table. */ |
1286 | if (h == NULL) | |
1287 | break; | |
1288 | ||
1289 | if (h->plt_offset == (bfd_vma) -1) | |
1290 | { | |
1291 | /* We didn't make a PLT entry for this symbol. This | |
a0271667 ILT |
1292 | happens when statically linking PIC code, or when |
1293 | using -Bsymbolic. */ | |
30dc85f1 ILT |
1294 | break; |
1295 | } | |
1296 | ||
1297 | if (splt == NULL) | |
1298 | { | |
1299 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1300 | BFD_ASSERT (splt != NULL); | |
1301 | } | |
1302 | ||
1303 | relocation = (splt->output_section->vma | |
1304 | + splt->output_offset | |
1305 | + h->plt_offset); | |
1306 | break; | |
1307 | ||
1308 | case R_68K_PLT8O: | |
1309 | case R_68K_PLT16O: | |
1310 | case R_68K_PLT32O: | |
1311 | /* Relocation is the offset of the entry for this symbol in | |
1312 | the procedure linkage table. */ | |
ff12f303 | 1313 | BFD_ASSERT (h != NULL && h->plt_offset == (bfd_vma) -1); |
30dc85f1 ILT |
1314 | |
1315 | if (splt == NULL) | |
1316 | { | |
1317 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1318 | BFD_ASSERT (splt != NULL); | |
1319 | } | |
1320 | ||
1321 | relocation = h->plt_offset; | |
ff12f303 ILT |
1322 | |
1323 | /* This relocation does not use the addend. */ | |
1324 | rel->r_addend = 0; | |
1325 | ||
30dc85f1 ILT |
1326 | break; |
1327 | ||
30dc85f1 ILT |
1328 | case R_68K_PC8: |
1329 | case R_68K_PC16: | |
1330 | case R_68K_PC32: | |
a0271667 ILT |
1331 | if (h == NULL) |
1332 | break; | |
1333 | /* Fall through. */ | |
1334 | case R_68K_8: | |
1335 | case R_68K_16: | |
1336 | case R_68K_32: | |
30dc85f1 | 1337 | if (info->shared |
ff12f303 ILT |
1338 | && (input_section->flags & SEC_ALLOC) != 0 |
1339 | && ((r_type != R_68K_PC8 | |
1340 | && r_type != R_68K_PC16 | |
1341 | && r_type != R_68K_PC32) | |
1342 | || (!info->symbolic | |
1343 | || (h->elf_link_hash_flags | |
1344 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
30dc85f1 ILT |
1345 | { |
1346 | Elf_Internal_Rela outrel; | |
6a1878c9 | 1347 | boolean skip, relocate; |
30dc85f1 ILT |
1348 | |
1349 | /* When generating a shared object, these relocations | |
1350 | are copied into the output file to be resolved at run | |
1351 | time. */ | |
1352 | ||
1353 | if (sreloc == NULL) | |
1354 | { | |
1355 | const char *name; | |
1356 | ||
ede4eed4 | 1357 | name = (bfd_elf_string_from_elf_section |
30dc85f1 ILT |
1358 | (input_bfd, |
1359 | elf_elfheader (input_bfd)->e_shstrndx, | |
1360 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1361 | if (name == NULL) | |
1362 | return false; | |
1363 | ||
1364 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1365 | && strcmp (bfd_get_section_name (input_bfd, | |
1366 | input_section), | |
1367 | name + 5) == 0); | |
1368 | ||
1369 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1370 | BFD_ASSERT (sreloc != NULL); | |
1371 | } | |
1372 | ||
6a1878c9 ILT |
1373 | skip = false; |
1374 | ||
1375 | if (elf_section_data (input_section)->stab_info == NULL) | |
1376 | outrel.r_offset = rel->r_offset; | |
1377 | else | |
1378 | { | |
1379 | bfd_vma off; | |
1380 | ||
1381 | off = (_bfd_stab_section_offset | |
1382 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1383 | input_section, | |
1384 | &elf_section_data (input_section)->stab_info, | |
1385 | rel->r_offset)); | |
1386 | if (off == (bfd_vma) -1) | |
1387 | skip = true; | |
1388 | outrel.r_offset = off; | |
1389 | } | |
1390 | ||
1391 | outrel.r_offset += (input_section->output_section->vma | |
1392 | + input_section->output_offset); | |
1393 | ||
1394 | if (skip) | |
1395 | { | |
1396 | memset (&outrel, 0, sizeof outrel); | |
1397 | relocate = false; | |
1398 | } | |
1399 | /* h->dynindx may be -1 if the symbol was marked to | |
1400 | become local. */ | |
1401 | else if (h != NULL | |
1402 | && ((! info->symbolic && h->dynindx != -1) | |
1403 | || (h->elf_link_hash_flags | |
1404 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
30dc85f1 ILT |
1405 | { |
1406 | BFD_ASSERT (h->dynindx != -1); | |
ff12f303 | 1407 | relocate = false; |
30dc85f1 | 1408 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
ff12f303 | 1409 | outrel.r_addend = relocation + rel->r_addend; |
30dc85f1 ILT |
1410 | } |
1411 | else | |
1412 | { | |
1413 | if (r_type == R_68K_32) | |
1414 | { | |
ff12f303 | 1415 | relocate = true; |
30dc85f1 ILT |
1416 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
1417 | outrel.r_addend = relocation + rel->r_addend; | |
1418 | } | |
1419 | else | |
1420 | { | |
1421 | long indx; | |
1422 | ||
53787b23 ILT |
1423 | if (h == NULL) |
1424 | sec = local_sections[r_symndx]; | |
1425 | else | |
1426 | { | |
1427 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1428 | || (h->root.type | |
1429 | == bfd_link_hash_defweak)); | |
1430 | sec = h->root.u.def.section; | |
1431 | } | |
30dc85f1 ILT |
1432 | if (sec != NULL && bfd_is_abs_section (sec)) |
1433 | indx = 0; | |
1434 | else if (sec == NULL || sec->owner == NULL) | |
1435 | { | |
1436 | bfd_set_error (bfd_error_bad_value); | |
1437 | return false; | |
1438 | } | |
1439 | else | |
1440 | { | |
1441 | asection *osec; | |
1442 | ||
1443 | osec = sec->output_section; | |
1444 | indx = elf_section_data (osec)->dynindx; | |
1445 | if (indx == 0) | |
1446 | abort (); | |
1447 | } | |
1448 | ||
ff12f303 | 1449 | relocate = false; |
30dc85f1 ILT |
1450 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
1451 | outrel.r_addend = relocation + rel->r_addend; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1456 | (((Elf32_External_Rela *) | |
1457 | sreloc->contents) | |
1458 | + sreloc->reloc_count)); | |
1459 | ++sreloc->reloc_count; | |
1460 | ||
1461 | /* This reloc will be computed at runtime, so there's no | |
ff12f303 ILT |
1462 | need to do anything now, except for R_68K_32 |
1463 | relocations that have been turned into | |
1464 | R_68K_RELATIVE. */ | |
1465 | if (!relocate) | |
1466 | continue; | |
30dc85f1 ILT |
1467 | } |
1468 | ||
1469 | break; | |
1470 | ||
1471 | default: | |
1472 | break; | |
1473 | } | |
1474 | ||
1475 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1476 | contents, rel->r_offset, | |
1477 | relocation, rel->r_addend); | |
1478 | ||
1479 | if (r != bfd_reloc_ok) | |
1480 | { | |
1481 | switch (r) | |
1482 | { | |
1483 | default: | |
1484 | case bfd_reloc_outofrange: | |
1485 | abort (); | |
1486 | case bfd_reloc_overflow: | |
1487 | { | |
1488 | const char *name; | |
1489 | ||
1490 | if (h != NULL) | |
1491 | name = h->root.root.string; | |
1492 | else | |
1493 | { | |
ede4eed4 KR |
1494 | name = bfd_elf_string_from_elf_section (input_bfd, |
1495 | symtab_hdr->sh_link, | |
1496 | sym->st_name); | |
30dc85f1 ILT |
1497 | if (name == NULL) |
1498 | return false; | |
1499 | if (*name == '\0') | |
1500 | name = bfd_section_name (input_bfd, sec); | |
1501 | } | |
1502 | if (!(info->callbacks->reloc_overflow | |
1503 | (info, name, howto->name, (bfd_vma) 0, | |
1504 | input_bfd, input_section, rel->r_offset))) | |
1505 | return false; | |
1506 | } | |
1507 | break; | |
1508 | } | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | return true; | |
1513 | } | |
1514 | ||
1515 | /* Finish up dynamic symbol handling. We set the contents of various | |
1516 | dynamic sections here. */ | |
1517 | ||
1518 | static boolean | |
1519 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1520 | bfd *output_bfd; | |
1521 | struct bfd_link_info *info; | |
1522 | struct elf_link_hash_entry *h; | |
1523 | Elf_Internal_Sym *sym; | |
1524 | { | |
1525 | bfd *dynobj; | |
1526 | ||
1527 | dynobj = elf_hash_table (info)->dynobj; | |
1528 | ||
1529 | if (h->plt_offset != (bfd_vma) -1) | |
1530 | { | |
1531 | asection *splt; | |
1532 | asection *sgot; | |
1533 | asection *srela; | |
1534 | bfd_vma plt_index; | |
1535 | bfd_vma got_offset; | |
1536 | Elf_Internal_Rela rela; | |
1537 | ||
1538 | /* This symbol has an entry in the procedure linkage table. Set | |
1539 | it up. */ | |
1540 | ||
1541 | BFD_ASSERT (h->dynindx != -1); | |
1542 | ||
1543 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1544 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1545 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1546 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1547 | ||
1548 | /* Get the index in the procedure linkage table which | |
1549 | corresponds to this symbol. This is the index of this symbol | |
1550 | in all the symbols for which we are making plt entries. The | |
1551 | first entry in the procedure linkage table is reserved. */ | |
1552 | plt_index = h->plt_offset / PLT_ENTRY_SIZE - 1; | |
1553 | ||
1554 | /* Get the offset into the .got table of the entry that | |
1555 | corresponds to this function. Each .got entry is 4 bytes. | |
1556 | The first three are reserved. */ | |
1557 | got_offset = (plt_index + 3) * 4; | |
1558 | ||
1559 | /* Fill in the entry in the procedure linkage table. */ | |
1560 | memcpy (splt->contents + h->plt_offset, elf_m68k_plt_entry, | |
1561 | PLT_ENTRY_SIZE); | |
1562 | /* The offset is relative to the first extension word. */ | |
1563 | bfd_put_32 (output_bfd, | |
1564 | (sgot->output_section->vma | |
1565 | + sgot->output_offset | |
1566 | + got_offset | |
1567 | - (splt->output_section->vma | |
1568 | + h->plt_offset + 2)), | |
1569 | splt->contents + h->plt_offset + 4); | |
1570 | ||
1571 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
1572 | splt->contents + h->plt_offset + 10); | |
1573 | bfd_put_32 (output_bfd, - (h->plt_offset + 16), | |
1574 | splt->contents + h->plt_offset + 16); | |
1575 | ||
1576 | /* Fill in the entry in the global offset table. */ | |
1577 | bfd_put_32 (output_bfd, | |
1578 | (splt->output_section->vma | |
1579 | + splt->output_offset | |
1580 | + h->plt_offset | |
1581 | + 8), | |
1582 | sgot->contents + got_offset); | |
1583 | ||
1584 | /* Fill in the entry in the .rela.plt section. */ | |
1585 | rela.r_offset = (sgot->output_section->vma | |
1586 | + sgot->output_offset | |
1587 | + got_offset); | |
1588 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
1589 | rela.r_addend = 0; | |
1590 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1591 | ((Elf32_External_Rela *) srela->contents | |
1592 | + plt_index)); | |
1593 | ||
1594 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1595 | { | |
1596 | /* Mark the symbol as undefined, rather than as defined in | |
1597 | the .plt section. Leave the value alone. */ | |
1598 | sym->st_shndx = SHN_UNDEF; | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | if (h->got_offset != (bfd_vma) -1) | |
1603 | { | |
1604 | asection *sgot; | |
1605 | asection *srela; | |
1606 | Elf_Internal_Rela rela; | |
1607 | ||
1608 | /* This symbol has an entry in the global offset table. Set it | |
1609 | up. */ | |
ff12f303 | 1610 | |
30dc85f1 ILT |
1611 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
1612 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1613 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1614 | ||
30dc85f1 ILT |
1615 | rela.r_offset = (sgot->output_section->vma |
1616 | + sgot->output_offset | |
a0271667 ILT |
1617 | + (h->got_offset &~ 1)); |
1618 | ||
1619 | /* If this is a -Bsymbolic link, and the symbol is defined | |
8519ea21 ILT |
1620 | locally, we just want to emit a RELATIVE reloc. Likewise if |
1621 | the symbol was forced to be local because of a version file. | |
1622 | The entry in the global offset table will already have been | |
1623 | initialized in the relocate_section function. */ | |
a0271667 | 1624 | if (info->shared |
8519ea21 | 1625 | && (info->symbolic || h->dynindx == -1) |
a0271667 | 1626 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
ff12f303 ILT |
1627 | { |
1628 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
fdc944a7 ILT |
1629 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
1630 | (sgot->contents | |
1631 | + (h->got_offset & ~1))); | |
ff12f303 | 1632 | } |
a0271667 ILT |
1633 | else |
1634 | { | |
ff12f303 ILT |
1635 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
1636 | sgot->contents + (h->got_offset & ~1)); | |
a0271667 | 1637 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); |
ff12f303 | 1638 | rela.r_addend = 0; |
a0271667 ILT |
1639 | } |
1640 | ||
30dc85f1 ILT |
1641 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
1642 | ((Elf32_External_Rela *) srela->contents | |
1643 | + srela->reloc_count)); | |
1644 | ++srela->reloc_count; | |
1645 | } | |
1646 | ||
1647 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1648 | { | |
1649 | asection *s; | |
1650 | Elf_Internal_Rela rela; | |
1651 | ||
1652 | /* This symbol needs a copy reloc. Set it up. */ | |
1653 | ||
1654 | BFD_ASSERT (h->dynindx != -1 | |
1655 | && (h->root.type == bfd_link_hash_defined | |
1656 | || h->root.type == bfd_link_hash_defweak)); | |
1657 | ||
1658 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1659 | ".rela.bss"); | |
1660 | BFD_ASSERT (s != NULL); | |
1661 | ||
1662 | rela.r_offset = (h->root.u.def.value | |
1663 | + h->root.u.def.section->output_section->vma | |
1664 | + h->root.u.def.section->output_offset); | |
1665 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
1666 | rela.r_addend = 0; | |
1667 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1668 | ((Elf32_External_Rela *) s->contents | |
1669 | + s->reloc_count)); | |
1670 | ++s->reloc_count; | |
1671 | } | |
1672 | ||
1673 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1674 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1675 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1676 | sym->st_shndx = SHN_ABS; | |
1677 | ||
1678 | return true; | |
1679 | } | |
1680 | ||
1681 | /* Finish up the dynamic sections. */ | |
1682 | ||
1683 | static boolean | |
1684 | elf_m68k_finish_dynamic_sections (output_bfd, info) | |
1685 | bfd *output_bfd; | |
1686 | struct bfd_link_info *info; | |
1687 | { | |
1688 | bfd *dynobj; | |
1689 | asection *sgot; | |
1690 | asection *sdyn; | |
1691 | ||
1692 | dynobj = elf_hash_table (info)->dynobj; | |
1693 | ||
1694 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1695 | BFD_ASSERT (sgot != NULL); | |
1696 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1697 | ||
1698 | if (elf_hash_table (info)->dynamic_sections_created) | |
1699 | { | |
1700 | asection *splt; | |
1701 | Elf32_External_Dyn *dyncon, *dynconend; | |
1702 | ||
1703 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1704 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
1705 | ||
1706 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
1707 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1708 | for (; dyncon < dynconend; dyncon++) | |
1709 | { | |
1710 | Elf_Internal_Dyn dyn; | |
1711 | const char *name; | |
1712 | asection *s; | |
1713 | ||
1714 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
1715 | ||
1716 | switch (dyn.d_tag) | |
1717 | { | |
1718 | default: | |
1719 | break; | |
1720 | ||
1721 | case DT_PLTGOT: | |
1722 | name = ".got"; | |
1723 | goto get_vma; | |
1724 | case DT_JMPREL: | |
1725 | name = ".rela.plt"; | |
1726 | get_vma: | |
1727 | s = bfd_get_section_by_name (output_bfd, name); | |
1728 | BFD_ASSERT (s != NULL); | |
1729 | dyn.d_un.d_ptr = s->vma; | |
1730 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1731 | break; | |
1732 | ||
1733 | case DT_PLTRELSZ: | |
1734 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1735 | BFD_ASSERT (s != NULL); | |
1736 | if (s->_cooked_size != 0) | |
1737 | dyn.d_un.d_val = s->_cooked_size; | |
1738 | else | |
1739 | dyn.d_un.d_val = s->_raw_size; | |
1740 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1741 | break; | |
1742 | ||
1743 | case DT_RELASZ: | |
ff12f303 ILT |
1744 | /* The procedure linkage table relocs (DT_JMPREL) should |
1745 | not be included in the overall relocs (DT_RELA). | |
1746 | Therefore, we override the DT_RELASZ entry here to | |
1747 | make it not include the JMPREL relocs. Since the | |
1748 | linker script arranges for .rela.plt to follow all | |
30dc85f1 ILT |
1749 | other relocation sections, we don't have to worry |
1750 | about changing the DT_RELA entry. */ | |
30dc85f1 ILT |
1751 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
1752 | if (s != NULL) | |
1753 | { | |
1754 | if (s->_cooked_size != 0) | |
1755 | dyn.d_un.d_val -= s->_cooked_size; | |
1756 | else | |
1757 | dyn.d_un.d_val -= s->_raw_size; | |
1758 | } | |
1759 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1760 | break; | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | /* Fill in the first entry in the procedure linkage table. */ | |
1765 | if (splt->_raw_size > 0) | |
1766 | { | |
1767 | memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE); | |
1768 | bfd_put_32 (output_bfd, | |
1769 | (sgot->output_section->vma | |
1770 | + sgot->output_offset + 4 | |
1771 | - (splt->output_section->vma + 2)), | |
1772 | splt->contents + 4); | |
1773 | bfd_put_32 (output_bfd, | |
1774 | (sgot->output_section->vma | |
1775 | + sgot->output_offset + 8 | |
1776 | - (splt->output_section->vma + 10)), | |
1777 | splt->contents + 12); | |
1778 | } | |
1779 | ||
1780 | elf_section_data (splt->output_section)->this_hdr.sh_entsize | |
1781 | = PLT_ENTRY_SIZE; | |
1782 | } | |
1783 | ||
1784 | /* Fill in the first three entries in the global offset table. */ | |
1785 | if (sgot->_raw_size > 0) | |
1786 | { | |
1787 | if (sdyn == NULL) | |
1788 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
1789 | else | |
1790 | bfd_put_32 (output_bfd, | |
1791 | sdyn->output_section->vma + sdyn->output_offset, | |
1792 | sgot->contents); | |
1793 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
1794 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
1795 | } | |
1796 | ||
1797 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
1798 | ||
1799 | return true; | |
1800 | } | |
1801 | ||
1802 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec | |
1803 | #define TARGET_BIG_NAME "elf32-m68k" | |
1804 | #define ELF_MACHINE_CODE EM_68K | |
1805 | #define ELF_MAXPAGESIZE 0x2000 | |
1806 | #define elf_backend_create_dynamic_sections \ | |
ede4eed4 | 1807 | _bfd_elf_create_dynamic_sections |
6a1878c9 ILT |
1808 | #define bfd_elf32_bfd_link_hash_table_create \ |
1809 | elf_m68k_link_hash_table_create | |
30dc85f1 ILT |
1810 | #define elf_backend_check_relocs elf_m68k_check_relocs |
1811 | #define elf_backend_adjust_dynamic_symbol \ | |
1812 | elf_m68k_adjust_dynamic_symbol | |
1813 | #define elf_backend_size_dynamic_sections \ | |
1814 | elf_m68k_size_dynamic_sections | |
1815 | #define elf_backend_relocate_section elf_m68k_relocate_section | |
1816 | #define elf_backend_finish_dynamic_symbol \ | |
1817 | elf_m68k_finish_dynamic_symbol | |
1818 | #define elf_backend_finish_dynamic_sections \ | |
1819 | elf_m68k_finish_dynamic_sections | |
ede4eed4 KR |
1820 | #define elf_backend_want_got_plt 1 |
1821 | #define elf_backend_plt_readonly 1 | |
1822 | #define elf_backend_want_plt_sym 0 | |
30dc85f1 ILT |
1823 | |
1824 | #include "elf32-target.h" |