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* linker.c (bfd_link_hash_traverse): Follow warning symbol link.
[deliverable/binutils-gdb.git] / bfd / elf32-m68k.c
1 /* Motorola 68k series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/m68k.h"
29 #include "opcode/m68k.h"
30
31 static reloc_howto_type *reloc_type_lookup
32 PARAMS ((bfd *, bfd_reloc_code_real_type));
33 static void rtype_to_howto
34 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
35 static struct bfd_hash_entry *elf_m68k_link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_m68k_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean elf_m68k_check_relocs
40 PARAMS ((bfd *, struct bfd_link_info *, asection *,
41 const Elf_Internal_Rela *));
42 static bfd_boolean elf_m68k_adjust_dynamic_symbol
43 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
44 static bfd_boolean elf_m68k_size_dynamic_sections
45 PARAMS ((bfd *, struct bfd_link_info *));
46 static bfd_boolean elf_m68k_discard_copies
47 PARAMS ((struct elf_link_hash_entry *, PTR));
48 static bfd_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 bfd_boolean elf_m68k_finish_dynamic_symbol
52 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
53 Elf_Internal_Sym *));
54 static bfd_boolean elf_m68k_finish_dynamic_sections
55 PARAMS ((bfd *, struct bfd_link_info *));
56
57 static bfd_boolean elf32_m68k_set_private_flags
58 PARAMS ((bfd *, flagword));
59 static bfd_boolean elf32_m68k_merge_private_bfd_data
60 PARAMS ((bfd *, bfd *));
61 static bfd_boolean elf32_m68k_print_private_bfd_data
62 PARAMS ((bfd *, PTR));
63 static enum elf_reloc_type_class elf32_m68k_reloc_type_class
64 PARAMS ((const Elf_Internal_Rela *));
65
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 */
92 0, /* rightshift */
93 2, /* size (0 = byte, 1 = short, 2 = long) */
94 0, /* bitsize */
95 FALSE, /* pc_relative */
96 0, /* bitpos */
97 complain_overflow_dont, /* complain_on_overflow */
98 NULL, /* special_function */
99 "R_68K_GNU_VTINHERIT", /* name */
100 FALSE, /* partial_inplace */
101 0, /* src_mask */
102 0, /* dst_mask */
103 FALSE),
104 /* GNU extension to record C++ vtable member usage. */
105 HOWTO (R_68K_GNU_VTENTRY, /* type */
106 0, /* rightshift */
107 2, /* size (0 = byte, 1 = short, 2 = long) */
108 0, /* bitsize */
109 FALSE, /* pc_relative */
110 0, /* bitpos */
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 */
115 0, /* src_mask */
116 0, /* dst_mask */
117 FALSE),
118
119 /* TLS general dynamic variable reference. */
120 HOWTO (R_68K_TLS_GD32, /* type */
121 0, /* rightshift */
122 2, /* size (0 = byte, 1 = short, 2 = long) */
123 32, /* bitsize */
124 FALSE, /* pc_relative */
125 0, /* bitpos */
126 complain_overflow_bitfield, /* complain_on_overflow */
127 bfd_elf_generic_reloc, /* special_function */
128 "R_68K_TLS_GD32", /* name */
129 FALSE, /* partial_inplace */
130 0, /* src_mask */
131 0xffffffff, /* dst_mask */
132 FALSE), /* pcrel_offset */
133
134 HOWTO (R_68K_TLS_GD16, /* type */
135 0, /* rightshift */
136 1, /* size (0 = byte, 1 = short, 2 = long) */
137 16, /* bitsize */
138 FALSE, /* pc_relative */
139 0, /* bitpos */
140 complain_overflow_signed, /* complain_on_overflow */
141 bfd_elf_generic_reloc, /* special_function */
142 "R_68K_TLS_GD16", /* name */
143 FALSE, /* partial_inplace */
144 0, /* src_mask */
145 0x0000ffff, /* dst_mask */
146 FALSE), /* pcrel_offset */
147
148 HOWTO (R_68K_TLS_GD8, /* type */
149 0, /* rightshift */
150 0, /* size (0 = byte, 1 = short, 2 = long) */
151 8, /* bitsize */
152 FALSE, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_signed, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_68K_TLS_GD8", /* name */
157 FALSE, /* partial_inplace */
158 0, /* src_mask */
159 0x000000ff, /* dst_mask */
160 FALSE), /* pcrel_offset */
161
162 /* TLS local dynamic variable reference. */
163 HOWTO (R_68K_TLS_LDM32, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_68K_TLS_LDM32", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0xffffffff, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 HOWTO (R_68K_TLS_LDM16, /* type */
178 0, /* rightshift */
179 1, /* size (0 = byte, 1 = short, 2 = long) */
180 16, /* bitsize */
181 FALSE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_signed, /* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_68K_TLS_LDM16", /* name */
186 FALSE, /* partial_inplace */
187 0, /* src_mask */
188 0x0000ffff, /* dst_mask */
189 FALSE), /* pcrel_offset */
190
191 HOWTO (R_68K_TLS_LDM8, /* type */
192 0, /* rightshift */
193 0, /* size (0 = byte, 1 = short, 2 = long) */
194 8, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_signed, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_68K_TLS_LDM8", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0x000000ff, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 HOWTO (R_68K_TLS_LDO32, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_bitfield, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_68K_TLS_LDO32", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0xffffffff, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 HOWTO (R_68K_TLS_LDO16, /* type */
220 0, /* rightshift */
221 1, /* size (0 = byte, 1 = short, 2 = long) */
222 16, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_68K_TLS_LDO16", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x0000ffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 HOWTO (R_68K_TLS_LDO8, /* type */
234 0, /* rightshift */
235 0, /* size (0 = byte, 1 = short, 2 = long) */
236 8, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_signed, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_68K_TLS_LDO8", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0x000000ff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* TLS initial execution variable reference. */
248 HOWTO (R_68K_TLS_IE32, /* type */
249 0, /* rightshift */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
251 32, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_bitfield, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_68K_TLS_IE32", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffffffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 HOWTO (R_68K_TLS_IE16, /* type */
263 0, /* rightshift */
264 1, /* size (0 = byte, 1 = short, 2 = long) */
265 16, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_signed, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_68K_TLS_IE16", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0x0000ffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 HOWTO (R_68K_TLS_IE8, /* type */
277 0, /* rightshift */
278 0, /* size (0 = byte, 1 = short, 2 = long) */
279 8, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_signed, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_68K_TLS_IE8", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0x000000ff, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* TLS local execution variable reference. */
291 HOWTO (R_68K_TLS_LE32, /* type */
292 0, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 32, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_68K_TLS_LE32", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffffffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 HOWTO (R_68K_TLS_LE16, /* type */
306 0, /* rightshift */
307 1, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_signed, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_68K_TLS_LE16", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x0000ffff, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 HOWTO (R_68K_TLS_LE8, /* type */
320 0, /* rightshift */
321 0, /* size (0 = byte, 1 = short, 2 = long) */
322 8, /* bitsize */
323 FALSE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_signed, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* special_function */
327 "R_68K_TLS_LE8", /* name */
328 FALSE, /* partial_inplace */
329 0, /* src_mask */
330 0x000000ff, /* dst_mask */
331 FALSE), /* pcrel_offset */
332
333 /* TLS GD/LD dynamic relocations. */
334 HOWTO (R_68K_TLS_DTPMOD32, /* type */
335 0, /* rightshift */
336 2, /* size (0 = byte, 1 = short, 2 = long) */
337 32, /* bitsize */
338 FALSE, /* pc_relative */
339 0, /* bitpos */
340 complain_overflow_dont, /* complain_on_overflow */
341 bfd_elf_generic_reloc, /* special_function */
342 "R_68K_TLS_DTPMOD32", /* name */
343 FALSE, /* partial_inplace */
344 0, /* src_mask */
345 0xffffffff, /* dst_mask */
346 FALSE), /* pcrel_offset */
347
348 HOWTO (R_68K_TLS_DTPREL32, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 32, /* bitsize */
352 FALSE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_dont, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_68K_TLS_DTPREL32", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0xffffffff, /* dst_mask */
360 FALSE), /* pcrel_offset */
361
362 HOWTO (R_68K_TLS_TPREL32, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 32, /* bitsize */
366 FALSE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_dont, /* complain_on_overflow */
369 bfd_elf_generic_reloc, /* special_function */
370 "R_68K_TLS_TPREL32", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0xffffffff, /* dst_mask */
374 FALSE), /* pcrel_offset */
375 };
376
377 static void
378 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
379 {
380 unsigned int indx = ELF32_R_TYPE (dst->r_info);
381
382 if (indx >= (unsigned int) R_68K_max)
383 {
384 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
385 abfd, (int) indx);
386 indx = R_68K_NONE;
387 }
388 cache_ptr->howto = &howto_table[indx];
389 }
390
391 #define elf_info_to_howto rtype_to_howto
392
393 static const struct
394 {
395 bfd_reloc_code_real_type bfd_val;
396 int elf_val;
397 }
398 reloc_map[] =
399 {
400 { BFD_RELOC_NONE, R_68K_NONE },
401 { BFD_RELOC_32, R_68K_32 },
402 { BFD_RELOC_16, R_68K_16 },
403 { BFD_RELOC_8, R_68K_8 },
404 { BFD_RELOC_32_PCREL, R_68K_PC32 },
405 { BFD_RELOC_16_PCREL, R_68K_PC16 },
406 { BFD_RELOC_8_PCREL, R_68K_PC8 },
407 { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
408 { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
409 { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
410 { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
411 { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
412 { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
413 { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
414 { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
415 { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
416 { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
417 { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
418 { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
419 { BFD_RELOC_NONE, R_68K_COPY },
420 { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
421 { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
422 { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
423 { BFD_RELOC_CTOR, R_68K_32 },
424 { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
425 { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
426 { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 },
427 { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 },
428 { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 },
429 { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 },
430 { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 },
431 { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 },
432 { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 },
433 { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 },
434 { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 },
435 { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 },
436 { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 },
437 { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 },
438 { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 },
439 { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 },
440 { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 },
441 };
442
443 static reloc_howto_type *
444 reloc_type_lookup (abfd, code)
445 bfd *abfd ATTRIBUTE_UNUSED;
446 bfd_reloc_code_real_type code;
447 {
448 unsigned int i;
449 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
450 {
451 if (reloc_map[i].bfd_val == code)
452 return &howto_table[reloc_map[i].elf_val];
453 }
454 return 0;
455 }
456
457 static reloc_howto_type *
458 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
459 {
460 unsigned int i;
461
462 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
463 if (howto_table[i].name != NULL
464 && strcasecmp (howto_table[i].name, r_name) == 0)
465 return &howto_table[i];
466
467 return NULL;
468 }
469
470 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
471 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
472 #define ELF_ARCH bfd_arch_m68k
473 #define ELF_TARGET_ID M68K_ELF_DATA
474 \f
475 /* Functions for the m68k ELF linker. */
476
477 /* The name of the dynamic interpreter. This is put in the .interp
478 section. */
479
480 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
481
482 /* Describes one of the various PLT styles. */
483
484 struct elf_m68k_plt_info
485 {
486 /* The size of each PLT entry. */
487 bfd_vma size;
488
489 /* The template for the first PLT entry. */
490 const bfd_byte *plt0_entry;
491
492 /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations.
493 The comments by each member indicate the value that the relocation
494 is against. */
495 struct {
496 unsigned int got4; /* .got + 4 */
497 unsigned int got8; /* .got + 8 */
498 } plt0_relocs;
499
500 /* The template for a symbol's PLT entry. */
501 const bfd_byte *symbol_entry;
502
503 /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations.
504 The comments by each member indicate the value that the relocation
505 is against. */
506 struct {
507 unsigned int got; /* the symbol's .got.plt entry */
508 unsigned int plt; /* .plt */
509 } symbol_relocs;
510
511 /* The offset of the resolver stub from the start of SYMBOL_ENTRY.
512 The stub starts with "move.l #relocoffset,%d0". */
513 bfd_vma symbol_resolve_entry;
514 };
515
516 /* The size in bytes of an entry in the procedure linkage table. */
517
518 #define PLT_ENTRY_SIZE 20
519
520 /* The first entry in a procedure linkage table looks like this. See
521 the SVR4 ABI m68k supplement to see how this works. */
522
523 static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
524 {
525 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
526 0, 0, 0, 2, /* + (.got + 4) - . */
527 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
528 0, 0, 0, 2, /* + (.got + 8) - . */
529 0, 0, 0, 0 /* pad out to 20 bytes. */
530 };
531
532 /* Subsequent entries in a procedure linkage table look like this. */
533
534 static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
535 {
536 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
537 0, 0, 0, 2, /* + (.got.plt entry) - . */
538 0x2f, 0x3c, /* move.l #offset,-(%sp) */
539 0, 0, 0, 0, /* + reloc index */
540 0x60, 0xff, /* bra.l .plt */
541 0, 0, 0, 0 /* + .plt - . */
542 };
543
544 static const struct elf_m68k_plt_info elf_m68k_plt_info = {
545 PLT_ENTRY_SIZE,
546 elf_m68k_plt0_entry, { 4, 12 },
547 elf_m68k_plt_entry, { 4, 16 }, 8
548 };
549
550 #define ISAB_PLT_ENTRY_SIZE 24
551
552 static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] =
553 {
554 0x20, 0x3c, /* move.l #offset,%d0 */
555 0, 0, 0, 0, /* + (.got + 4) - . */
556 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */
557 0x20, 0x3c, /* move.l #offset,%d0 */
558 0, 0, 0, 0, /* + (.got + 8) - . */
559 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
560 0x4e, 0xd0, /* jmp (%a0) */
561 0x4e, 0x71 /* nop */
562 };
563
564 /* Subsequent entries in a procedure linkage table look like this. */
565
566 static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] =
567 {
568 0x20, 0x3c, /* move.l #offset,%d0 */
569 0, 0, 0, 0, /* + (.got.plt entry) - . */
570 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
571 0x4e, 0xd0, /* jmp (%a0) */
572 0x2f, 0x3c, /* move.l #offset,-(%sp) */
573 0, 0, 0, 0, /* + reloc index */
574 0x60, 0xff, /* bra.l .plt */
575 0, 0, 0, 0 /* + .plt - . */
576 };
577
578 static const struct elf_m68k_plt_info elf_isab_plt_info = {
579 ISAB_PLT_ENTRY_SIZE,
580 elf_isab_plt0_entry, { 2, 12 },
581 elf_isab_plt_entry, { 2, 20 }, 12
582 };
583
584 #define ISAC_PLT_ENTRY_SIZE 24
585
586 static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] =
587 {
588 0x20, 0x3c, /* move.l #offset,%d0 */
589 0, 0, 0, 0, /* replaced with .got + 4 - . */
590 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
591 0x20, 0x3c, /* move.l #offset,%d0 */
592 0, 0, 0, 0, /* replaced with .got + 8 - . */
593 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
594 0x4e, 0xd0, /* jmp (%a0) */
595 0x4e, 0x71 /* nop */
596 };
597
598 /* Subsequent entries in a procedure linkage table look like this. */
599
600 static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] =
601 {
602 0x20, 0x3c, /* move.l #offset,%d0 */
603 0, 0, 0, 0, /* replaced with (.got entry) - . */
604 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
605 0x4e, 0xd0, /* jmp (%a0) */
606 0x2f, 0x3c, /* move.l #offset,-(%sp) */
607 0, 0, 0, 0, /* replaced with offset into relocation table */
608 0x61, 0xff, /* bsr.l .plt */
609 0, 0, 0, 0 /* replaced with .plt - . */
610 };
611
612 static const struct elf_m68k_plt_info elf_isac_plt_info = {
613 ISAC_PLT_ENTRY_SIZE,
614 elf_isac_plt0_entry, { 2, 12},
615 elf_isac_plt_entry, { 2, 20 }, 12
616 };
617
618 #define CPU32_PLT_ENTRY_SIZE 24
619 /* Procedure linkage table entries for the cpu32 */
620 static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] =
621 {
622 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
623 0, 0, 0, 2, /* + (.got + 4) - . */
624 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
625 0, 0, 0, 2, /* + (.got + 8) - . */
626 0x4e, 0xd1, /* jmp %a1@ */
627 0, 0, 0, 0, /* pad out to 24 bytes. */
628 0, 0
629 };
630
631 static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] =
632 {
633 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
634 0, 0, 0, 2, /* + (.got.plt entry) - . */
635 0x4e, 0xd1, /* jmp %a1@ */
636 0x2f, 0x3c, /* move.l #offset,-(%sp) */
637 0, 0, 0, 0, /* + reloc index */
638 0x60, 0xff, /* bra.l .plt */
639 0, 0, 0, 0, /* + .plt - . */
640 0, 0
641 };
642
643 static const struct elf_m68k_plt_info elf_cpu32_plt_info = {
644 CPU32_PLT_ENTRY_SIZE,
645 elf_cpu32_plt0_entry, { 4, 12 },
646 elf_cpu32_plt_entry, { 4, 18 }, 10
647 };
648
649 /* The m68k linker needs to keep track of the number of relocs that it
650 decides to copy in check_relocs for each symbol. This is so that it
651 can discard PC relative relocs if it doesn't need them when linking
652 with -Bsymbolic. We store the information in a field extending the
653 regular ELF linker hash table. */
654
655 /* This structure keeps track of the number of PC relative relocs we have
656 copied for a given symbol. */
657
658 struct elf_m68k_pcrel_relocs_copied
659 {
660 /* Next section. */
661 struct elf_m68k_pcrel_relocs_copied *next;
662 /* A section in dynobj. */
663 asection *section;
664 /* Number of relocs copied in this section. */
665 bfd_size_type count;
666 };
667
668 /* Forward declaration. */
669 struct elf_m68k_got_entry;
670
671 /* m68k ELF linker hash entry. */
672
673 struct elf_m68k_link_hash_entry
674 {
675 struct elf_link_hash_entry root;
676
677 /* Number of PC relative relocs copied for this symbol. */
678 struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
679
680 /* Key to got_entries. */
681 unsigned long got_entry_key;
682
683 /* List of GOT entries for this symbol. This list is build during
684 offset finalization and is used within elf_m68k_finish_dynamic_symbol
685 to traverse all GOT entries for a particular symbol.
686
687 ??? We could've used root.got.glist field instead, but having
688 a separate field is cleaner. */
689 struct elf_m68k_got_entry *glist;
690 };
691
692 #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
693
694 /* Key part of GOT entry in hashtable. */
695 struct elf_m68k_got_entry_key
696 {
697 /* BFD in which this symbol was defined. NULL for global symbols. */
698 const bfd *bfd;
699
700 /* Symbol index. Either local symbol index or h->got_entry_key. */
701 unsigned long symndx;
702
703 /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32},
704 R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}.
705
706 From perspective of hashtable key, only elf_m68k_got_reloc_type (type)
707 matters. That is, we distinguish between, say, R_68K_GOT16O
708 and R_68K_GOT32O when allocating offsets, but they are considered to be
709 the same when searching got->entries. */
710 enum elf_m68k_reloc_type type;
711 };
712
713 /* Size of the GOT offset suitable for relocation. */
714 enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST };
715
716 /* Entry of the GOT. */
717 struct elf_m68k_got_entry
718 {
719 /* GOT entries are put into a got->entries hashtable. This is the key. */
720 struct elf_m68k_got_entry_key key_;
721
722 /* GOT entry data. We need s1 before offset finalization and s2 after. */
723 union
724 {
725 struct
726 {
727 /* Number of times this entry is referenced. It is used to
728 filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook. */
729 bfd_vma refcount;
730 } s1;
731
732 struct
733 {
734 /* Offset from the start of .got section. To calculate offset relative
735 to GOT pointer one should substract got->offset from this value. */
736 bfd_vma offset;
737
738 /* Pointer to the next GOT entry for this global symbol.
739 Symbols have at most one entry in one GOT, but might
740 have entries in more than one GOT.
741 Root of this list is h->glist.
742 NULL for local symbols. */
743 struct elf_m68k_got_entry *next;
744 } s2;
745 } u;
746 };
747
748 /* Return representative type for relocation R_TYPE.
749 This is used to avoid enumerating many relocations in comparisons,
750 switches etc. */
751
752 static enum elf_m68k_reloc_type
753 elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type)
754 {
755 switch (r_type)
756 {
757 /* In most cases R_68K_GOTx relocations require the very same
758 handling as R_68K_GOT32O relocation. In cases when we need
759 to distinguish between the two, we use explicitly compare against
760 r_type. */
761 case R_68K_GOT32:
762 case R_68K_GOT16:
763 case R_68K_GOT8:
764 case R_68K_GOT32O:
765 case R_68K_GOT16O:
766 case R_68K_GOT8O:
767 return R_68K_GOT32O;
768
769 case R_68K_TLS_GD32:
770 case R_68K_TLS_GD16:
771 case R_68K_TLS_GD8:
772 return R_68K_TLS_GD32;
773
774 case R_68K_TLS_LDM32:
775 case R_68K_TLS_LDM16:
776 case R_68K_TLS_LDM8:
777 return R_68K_TLS_LDM32;
778
779 case R_68K_TLS_IE32:
780 case R_68K_TLS_IE16:
781 case R_68K_TLS_IE8:
782 return R_68K_TLS_IE32;
783
784 default:
785 BFD_ASSERT (FALSE);
786 return 0;
787 }
788 }
789
790 /* Return size of the GOT entry offset for relocation R_TYPE. */
791
792 static enum elf_m68k_got_offset_size
793 elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type)
794 {
795 switch (r_type)
796 {
797 case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8:
798 case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32:
799 case R_68K_TLS_IE32:
800 return R_32;
801
802 case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16:
803 case R_68K_TLS_IE16:
804 return R_16;
805
806 case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8:
807 case R_68K_TLS_IE8:
808 return R_8;
809
810 default:
811 BFD_ASSERT (FALSE);
812 return 0;
813 }
814 }
815
816 /* Return number of GOT entries we need to allocate in GOT for
817 relocation R_TYPE. */
818
819 static bfd_vma
820 elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type)
821 {
822 switch (elf_m68k_reloc_got_type (r_type))
823 {
824 case R_68K_GOT32O:
825 case R_68K_TLS_IE32:
826 return 1;
827
828 case R_68K_TLS_GD32:
829 case R_68K_TLS_LDM32:
830 return 2;
831
832 default:
833 BFD_ASSERT (FALSE);
834 return 0;
835 }
836 }
837
838 /* Return TRUE if relocation R_TYPE is a TLS one. */
839
840 static bfd_boolean
841 elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type)
842 {
843 switch (r_type)
844 {
845 case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8:
846 case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8:
847 case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8:
848 case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8:
849 case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8:
850 case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32:
851 return TRUE;
852
853 default:
854 return FALSE;
855 }
856 }
857
858 /* Data structure representing a single GOT. */
859 struct elf_m68k_got
860 {
861 /* Hashtable of 'struct elf_m68k_got_entry's.
862 Starting size of this table is the maximum number of
863 R_68K_GOT8O entries. */
864 htab_t entries;
865
866 /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require
867 several GOT slots.
868
869 n_slots[R_8] is the count of R_8 slots in this GOT.
870 n_slots[R_16] is the cumulative count of R_8 and R_16 slots
871 in this GOT.
872 n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots
873 in this GOT. This is the total number of slots. */
874 bfd_vma n_slots[R_LAST];
875
876 /* Number of local (entry->key_.h == NULL) slots in this GOT.
877 This is only used to properly calculate size of .rela.got section;
878 see elf_m68k_partition_multi_got. */
879 bfd_vma local_n_slots;
880
881 /* Offset of this GOT relative to beginning of .got section. */
882 bfd_vma offset;
883 };
884
885 /* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */
886 struct elf_m68k_bfd2got_entry
887 {
888 /* BFD. */
889 const bfd *bfd;
890
891 /* Assigned GOT. Before partitioning multi-GOT each BFD has its own
892 GOT structure. After partitioning several BFD's might [and often do]
893 share a single GOT. */
894 struct elf_m68k_got *got;
895 };
896
897 /* The main data structure holding all the pieces. */
898 struct elf_m68k_multi_got
899 {
900 /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry
901 here, then it doesn't need a GOT (this includes the case of a BFD
902 having an empty GOT).
903
904 ??? This hashtable can be replaced by an array indexed by bfd->id. */
905 htab_t bfd2got;
906
907 /* Next symndx to assign a global symbol.
908 h->got_entry_key is initialized from this counter. */
909 unsigned long global_symndx;
910 };
911
912 /* m68k ELF linker hash table. */
913
914 struct elf_m68k_link_hash_table
915 {
916 struct elf_link_hash_table root;
917
918 /* Small local sym cache. */
919 struct sym_cache sym_cache;
920
921 /* The PLT format used by this link, or NULL if the format has not
922 yet been chosen. */
923 const struct elf_m68k_plt_info *plt_info;
924
925 /* True, if GP is loaded within each function which uses it.
926 Set to TRUE when GOT negative offsets or multi-GOT is enabled. */
927 bfd_boolean local_gp_p;
928
929 /* Switch controlling use of negative offsets to double the size of GOTs. */
930 bfd_boolean use_neg_got_offsets_p;
931
932 /* Switch controlling generation of multiple GOTs. */
933 bfd_boolean allow_multigot_p;
934
935 /* Multi-GOT data structure. */
936 struct elf_m68k_multi_got multi_got_;
937 };
938
939 /* Get the m68k ELF linker hash table from a link_info structure. */
940
941 #define elf_m68k_hash_table(p) \
942 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
943 == M68K_ELF_DATA ? ((struct elf_m68k_link_hash_table *) ((p)->hash)) : NULL)
944
945 /* Shortcut to multi-GOT data. */
946 #define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_)
947
948 /* Create an entry in an m68k ELF linker hash table. */
949
950 static struct bfd_hash_entry *
951 elf_m68k_link_hash_newfunc (struct bfd_hash_entry *entry,
952 struct bfd_hash_table *table,
953 const char *string)
954 {
955 struct bfd_hash_entry *ret = entry;
956
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (ret == NULL)
960 ret = bfd_hash_allocate (table,
961 sizeof (struct elf_m68k_link_hash_entry));
962 if (ret == NULL)
963 return ret;
964
965 /* Call the allocation method of the superclass. */
966 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
967 if (ret != NULL)
968 {
969 elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL;
970 elf_m68k_hash_entry (ret)->got_entry_key = 0;
971 elf_m68k_hash_entry (ret)->glist = NULL;
972 }
973
974 return ret;
975 }
976
977 /* Create an m68k ELF linker hash table. */
978
979 static struct bfd_link_hash_table *
980 elf_m68k_link_hash_table_create (bfd *abfd)
981 {
982 struct elf_m68k_link_hash_table *ret;
983 bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table);
984
985 ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt);
986 if (ret == (struct elf_m68k_link_hash_table *) NULL)
987 return NULL;
988
989 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
990 elf_m68k_link_hash_newfunc,
991 sizeof (struct elf_m68k_link_hash_entry),
992 M68K_ELF_DATA))
993 {
994 free (ret);
995 return NULL;
996 }
997
998 ret->sym_cache.abfd = NULL;
999 ret->plt_info = NULL;
1000 ret->local_gp_p = FALSE;
1001 ret->use_neg_got_offsets_p = FALSE;
1002 ret->allow_multigot_p = FALSE;
1003 ret->multi_got_.bfd2got = NULL;
1004 ret->multi_got_.global_symndx = 1;
1005
1006 return &ret->root.root;
1007 }
1008
1009 /* Destruct local data. */
1010
1011 static void
1012 elf_m68k_link_hash_table_free (struct bfd_link_hash_table *_htab)
1013 {
1014 struct elf_m68k_link_hash_table *htab;
1015
1016 htab = (struct elf_m68k_link_hash_table *) _htab;
1017
1018 if (htab->multi_got_.bfd2got != NULL)
1019 {
1020 htab_delete (htab->multi_got_.bfd2got);
1021 htab->multi_got_.bfd2got = NULL;
1022 }
1023 }
1024
1025 /* Set the right machine number. */
1026
1027 static bfd_boolean
1028 elf32_m68k_object_p (bfd *abfd)
1029 {
1030 unsigned int mach = 0;
1031 unsigned features = 0;
1032 flagword eflags = elf_elfheader (abfd)->e_flags;
1033
1034 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1035 features |= m68000;
1036 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1037 features |= cpu32;
1038 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1039 features |= fido_a;
1040 else
1041 {
1042 switch (eflags & EF_M68K_CF_ISA_MASK)
1043 {
1044 case EF_M68K_CF_ISA_A_NODIV:
1045 features |= mcfisa_a;
1046 break;
1047 case EF_M68K_CF_ISA_A:
1048 features |= mcfisa_a|mcfhwdiv;
1049 break;
1050 case EF_M68K_CF_ISA_A_PLUS:
1051 features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp;
1052 break;
1053 case EF_M68K_CF_ISA_B_NOUSP:
1054 features |= mcfisa_a|mcfisa_b|mcfhwdiv;
1055 break;
1056 case EF_M68K_CF_ISA_B:
1057 features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp;
1058 break;
1059 case EF_M68K_CF_ISA_C:
1060 features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp;
1061 break;
1062 case EF_M68K_CF_ISA_C_NODIV:
1063 features |= mcfisa_a|mcfisa_c|mcfusp;
1064 break;
1065 }
1066 switch (eflags & EF_M68K_CF_MAC_MASK)
1067 {
1068 case EF_M68K_CF_MAC:
1069 features |= mcfmac;
1070 break;
1071 case EF_M68K_CF_EMAC:
1072 features |= mcfemac;
1073 break;
1074 }
1075 if (eflags & EF_M68K_CF_FLOAT)
1076 features |= cfloat;
1077 }
1078
1079 mach = bfd_m68k_features_to_mach (features);
1080 bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach);
1081
1082 return TRUE;
1083 }
1084
1085 /* Somewhat reverse of elf32_m68k_object_p, this sets the e_flag
1086 field based on the machine number. */
1087
1088 static void
1089 elf_m68k_final_write_processing (bfd *abfd,
1090 bfd_boolean linker ATTRIBUTE_UNUSED)
1091 {
1092 int mach = bfd_get_mach (abfd);
1093 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
1094
1095 if (!e_flags)
1096 {
1097 unsigned int arch_mask;
1098
1099 arch_mask = bfd_m68k_mach_to_features (mach);
1100
1101 if (arch_mask & m68000)
1102 e_flags = EF_M68K_M68000;
1103 else if (arch_mask & cpu32)
1104 e_flags = EF_M68K_CPU32;
1105 else if (arch_mask & fido_a)
1106 e_flags = EF_M68K_FIDO;
1107 else
1108 {
1109 switch (arch_mask
1110 & (mcfisa_a | mcfisa_aa | mcfisa_b | mcfisa_c | mcfhwdiv | mcfusp))
1111 {
1112 case mcfisa_a:
1113 e_flags |= EF_M68K_CF_ISA_A_NODIV;
1114 break;
1115 case mcfisa_a | mcfhwdiv:
1116 e_flags |= EF_M68K_CF_ISA_A;
1117 break;
1118 case mcfisa_a | mcfisa_aa | mcfhwdiv | mcfusp:
1119 e_flags |= EF_M68K_CF_ISA_A_PLUS;
1120 break;
1121 case mcfisa_a | mcfisa_b | mcfhwdiv:
1122 e_flags |= EF_M68K_CF_ISA_B_NOUSP;
1123 break;
1124 case mcfisa_a | mcfisa_b | mcfhwdiv | mcfusp:
1125 e_flags |= EF_M68K_CF_ISA_B;
1126 break;
1127 case mcfisa_a | mcfisa_c | mcfhwdiv | mcfusp:
1128 e_flags |= EF_M68K_CF_ISA_C;
1129 break;
1130 case mcfisa_a | mcfisa_c | mcfusp:
1131 e_flags |= EF_M68K_CF_ISA_C_NODIV;
1132 break;
1133 }
1134 if (arch_mask & mcfmac)
1135 e_flags |= EF_M68K_CF_MAC;
1136 else if (arch_mask & mcfemac)
1137 e_flags |= EF_M68K_CF_EMAC;
1138 if (arch_mask & cfloat)
1139 e_flags |= EF_M68K_CF_FLOAT | EF_M68K_CFV4E;
1140 }
1141 elf_elfheader (abfd)->e_flags = e_flags;
1142 }
1143 }
1144
1145 /* Keep m68k-specific flags in the ELF header. */
1146
1147 static bfd_boolean
1148 elf32_m68k_set_private_flags (abfd, flags)
1149 bfd *abfd;
1150 flagword flags;
1151 {
1152 elf_elfheader (abfd)->e_flags = flags;
1153 elf_flags_init (abfd) = TRUE;
1154 return TRUE;
1155 }
1156
1157 /* Merge backend specific data from an object file to the output
1158 object file when linking. */
1159 static bfd_boolean
1160 elf32_m68k_merge_private_bfd_data (ibfd, obfd)
1161 bfd *ibfd;
1162 bfd *obfd;
1163 {
1164 flagword out_flags;
1165 flagword in_flags;
1166 flagword out_isa;
1167 flagword in_isa;
1168 const bfd_arch_info_type *arch_info;
1169
1170 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1171 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1172 return FALSE;
1173
1174 /* Get the merged machine. This checks for incompatibility between
1175 Coldfire & non-Coldfire flags, incompability between different
1176 Coldfire ISAs, and incompability between different MAC types. */
1177 arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE);
1178 if (!arch_info)
1179 return FALSE;
1180
1181 bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach);
1182
1183 in_flags = elf_elfheader (ibfd)->e_flags;
1184 if (!elf_flags_init (obfd))
1185 {
1186 elf_flags_init (obfd) = TRUE;
1187 out_flags = in_flags;
1188 }
1189 else
1190 {
1191 out_flags = elf_elfheader (obfd)->e_flags;
1192 unsigned int variant_mask;
1193
1194 if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1195 variant_mask = 0;
1196 else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1197 variant_mask = 0;
1198 else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1199 variant_mask = 0;
1200 else
1201 variant_mask = EF_M68K_CF_ISA_MASK;
1202
1203 in_isa = (in_flags & variant_mask);
1204 out_isa = (out_flags & variant_mask);
1205 if (in_isa > out_isa)
1206 out_flags ^= in_isa ^ out_isa;
1207 if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32
1208 && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1209 || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO
1210 && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32))
1211 out_flags = EF_M68K_FIDO;
1212 else
1213 out_flags |= in_flags ^ in_isa;
1214 }
1215 elf_elfheader (obfd)->e_flags = out_flags;
1216
1217 return TRUE;
1218 }
1219
1220 /* Display the flags field. */
1221
1222 static bfd_boolean
1223 elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr)
1224 {
1225 FILE *file = (FILE *) ptr;
1226 flagword eflags = elf_elfheader (abfd)->e_flags;
1227
1228 BFD_ASSERT (abfd != NULL && ptr != NULL);
1229
1230 /* Print normal ELF private data. */
1231 _bfd_elf_print_private_bfd_data (abfd, ptr);
1232
1233 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
1234
1235 /* xgettext:c-format */
1236 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
1237
1238 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1239 fprintf (file, " [m68000]");
1240 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1241 fprintf (file, " [cpu32]");
1242 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1243 fprintf (file, " [fido]");
1244 else
1245 {
1246 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E)
1247 fprintf (file, " [cfv4e]");
1248
1249 if (eflags & EF_M68K_CF_ISA_MASK)
1250 {
1251 char const *isa = _("unknown");
1252 char const *mac = _("unknown");
1253 char const *additional = "";
1254
1255 switch (eflags & EF_M68K_CF_ISA_MASK)
1256 {
1257 case EF_M68K_CF_ISA_A_NODIV:
1258 isa = "A";
1259 additional = " [nodiv]";
1260 break;
1261 case EF_M68K_CF_ISA_A:
1262 isa = "A";
1263 break;
1264 case EF_M68K_CF_ISA_A_PLUS:
1265 isa = "A+";
1266 break;
1267 case EF_M68K_CF_ISA_B_NOUSP:
1268 isa = "B";
1269 additional = " [nousp]";
1270 break;
1271 case EF_M68K_CF_ISA_B:
1272 isa = "B";
1273 break;
1274 case EF_M68K_CF_ISA_C:
1275 isa = "C";
1276 break;
1277 case EF_M68K_CF_ISA_C_NODIV:
1278 isa = "C";
1279 additional = " [nodiv]";
1280 break;
1281 }
1282 fprintf (file, " [isa %s]%s", isa, additional);
1283
1284 if (eflags & EF_M68K_CF_FLOAT)
1285 fprintf (file, " [float]");
1286
1287 switch (eflags & EF_M68K_CF_MAC_MASK)
1288 {
1289 case 0:
1290 mac = NULL;
1291 break;
1292 case EF_M68K_CF_MAC:
1293 mac = "mac";
1294 break;
1295 case EF_M68K_CF_EMAC:
1296 mac = "emac";
1297 break;
1298 case EF_M68K_CF_EMAC_B:
1299 mac = "emac_b";
1300 break;
1301 }
1302 if (mac)
1303 fprintf (file, " [%s]", mac);
1304 }
1305 }
1306
1307 fputc ('\n', file);
1308
1309 return TRUE;
1310 }
1311
1312 /* Multi-GOT support implementation design:
1313
1314 Multi-GOT starts in check_relocs hook. There we scan all
1315 relocations of a BFD and build a local GOT (struct elf_m68k_got)
1316 for it. If a single BFD appears to require too many GOT slots with
1317 R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification
1318 to user.
1319 After check_relocs has been invoked for each input BFD, we have
1320 constructed a GOT for each input BFD.
1321
1322 To minimize total number of GOTs required for a particular output BFD
1323 (as some environments support only 1 GOT per output object) we try
1324 to merge some of the GOTs to share an offset space. Ideally [and in most
1325 cases] we end up with a single GOT. In cases when there are too many
1326 restricted relocations (e.g., R_68K_GOT16O relocations) we end up with
1327 several GOTs, assuming the environment can handle them.
1328
1329 Partitioning is done in elf_m68k_partition_multi_got. We start with
1330 an empty GOT and traverse bfd2got hashtable putting got_entries from
1331 local GOTs to the new 'big' one. We do that by constructing an
1332 intermediate GOT holding all the entries the local GOT has and the big
1333 GOT lacks. Then we check if there is room in the big GOT to accomodate
1334 all the entries from diff. On success we add those entries to the big
1335 GOT; on failure we start the new 'big' GOT and retry the adding of
1336 entries from the local GOT. Note that this retry will always succeed as
1337 each local GOT doesn't overflow the limits. After partitioning we
1338 end up with each bfd assigned one of the big GOTs. GOT entries in the
1339 big GOTs are initialized with GOT offsets. Note that big GOTs are
1340 positioned consequently in program space and represent a single huge GOT
1341 to the outside world.
1342
1343 After that we get to elf_m68k_relocate_section. There we
1344 adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol
1345 relocations to refer to appropriate [assigned to current input_bfd]
1346 big GOT.
1347
1348 Notes:
1349
1350 GOT entry type: We have several types of GOT entries.
1351 * R_8 type is used in entries for symbols that have at least one
1352 R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40
1353 such entries in one GOT.
1354 * R_16 type is used in entries for symbols that have at least one
1355 R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations.
1356 We can have at most 0x4000 such entries in one GOT.
1357 * R_32 type is used in all other cases. We can have as many
1358 such entries in one GOT as we'd like.
1359 When counting relocations we have to include the count of the smaller
1360 ranged relocations in the counts of the larger ranged ones in order
1361 to correctly detect overflow.
1362
1363 Sorting the GOT: In each GOT starting offsets are assigned to
1364 R_8 entries, which are followed by R_16 entries, and
1365 R_32 entries go at the end. See finalize_got_offsets for details.
1366
1367 Negative GOT offsets: To double usable offset range of GOTs we use
1368 negative offsets. As we assign entries with GOT offsets relative to
1369 start of .got section, the offset values are positive. They become
1370 negative only in relocate_section where got->offset value is
1371 subtracted from them.
1372
1373 3 special GOT entries: There are 3 special GOT entries used internally
1374 by loader. These entries happen to be placed to .got.plt section,
1375 so we don't do anything about them in multi-GOT support.
1376
1377 Memory management: All data except for hashtables
1378 multi_got->bfd2got and got->entries are allocated on
1379 elf_hash_table (info)->dynobj bfd (for this reason we pass 'info'
1380 to most functions), so we don't need to care to free them. At the
1381 moment of allocation hashtables are being linked into main data
1382 structure (multi_got), all pieces of which are reachable from
1383 elf_m68k_multi_got (info). We deallocate them in
1384 elf_m68k_link_hash_table_free. */
1385
1386 /* Initialize GOT. */
1387
1388 static void
1389 elf_m68k_init_got (struct elf_m68k_got *got)
1390 {
1391 got->entries = NULL;
1392 got->n_slots[R_8] = 0;
1393 got->n_slots[R_16] = 0;
1394 got->n_slots[R_32] = 0;
1395 got->local_n_slots = 0;
1396 got->offset = (bfd_vma) -1;
1397 }
1398
1399 /* Destruct GOT. */
1400
1401 static void
1402 elf_m68k_clear_got (struct elf_m68k_got *got)
1403 {
1404 if (got->entries != NULL)
1405 {
1406 htab_delete (got->entries);
1407 got->entries = NULL;
1408 }
1409 }
1410
1411 /* Create and empty GOT structure. INFO is the context where memory
1412 should be allocated. */
1413
1414 static struct elf_m68k_got *
1415 elf_m68k_create_empty_got (struct bfd_link_info *info)
1416 {
1417 struct elf_m68k_got *got;
1418
1419 got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got));
1420 if (got == NULL)
1421 return NULL;
1422
1423 elf_m68k_init_got (got);
1424
1425 return got;
1426 }
1427
1428 /* Initialize KEY. */
1429
1430 static void
1431 elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key,
1432 struct elf_link_hash_entry *h,
1433 const bfd *abfd, unsigned long symndx,
1434 enum elf_m68k_reloc_type reloc_type)
1435 {
1436 if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32)
1437 /* All TLS_LDM relocations share a single GOT entry. */
1438 {
1439 key->bfd = NULL;
1440 key->symndx = 0;
1441 }
1442 else if (h != NULL)
1443 /* Global symbols are identified with their got_entry_key. */
1444 {
1445 key->bfd = NULL;
1446 key->symndx = elf_m68k_hash_entry (h)->got_entry_key;
1447 BFD_ASSERT (key->symndx != 0);
1448 }
1449 else
1450 /* Local symbols are identified by BFD they appear in and symndx. */
1451 {
1452 key->bfd = abfd;
1453 key->symndx = symndx;
1454 }
1455
1456 key->type = reloc_type;
1457 }
1458
1459 /* Calculate hash of got_entry.
1460 ??? Is it good? */
1461
1462 static hashval_t
1463 elf_m68k_got_entry_hash (const void *_entry)
1464 {
1465 const struct elf_m68k_got_entry_key *key;
1466
1467 key = &((const struct elf_m68k_got_entry *) _entry)->key_;
1468
1469 return (key->symndx
1470 + (key->bfd != NULL ? (int) key->bfd->id : -1)
1471 + elf_m68k_reloc_got_type (key->type));
1472 }
1473
1474 /* Check if two got entries are equal. */
1475
1476 static int
1477 elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2)
1478 {
1479 const struct elf_m68k_got_entry_key *key1;
1480 const struct elf_m68k_got_entry_key *key2;
1481
1482 key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_;
1483 key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_;
1484
1485 return (key1->bfd == key2->bfd
1486 && key1->symndx == key2->symndx
1487 && (elf_m68k_reloc_got_type (key1->type)
1488 == elf_m68k_reloc_got_type (key2->type)));
1489 }
1490
1491 /* When using negative offsets, we allocate one extra R_8, one extra R_16
1492 and one extra R_32 slots to simplify handling of 2-slot entries during
1493 offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */
1494
1495 /* Maximal number of R_8 slots in a single GOT. */
1496 #define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \
1497 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1498 ? (0x40 - 1) \
1499 : 0x20)
1500
1501 /* Maximal number of R_8 and R_16 slots in a single GOT. */
1502 #define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \
1503 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1504 ? (0x4000 - 2) \
1505 : 0x2000)
1506
1507 /* SEARCH - simply search the hashtable, don't insert new entries or fail when
1508 the entry cannot be found.
1509 FIND_OR_CREATE - search for an existing entry, but create new if there's
1510 no such.
1511 MUST_FIND - search for an existing entry and assert that it exist.
1512 MUST_CREATE - assert that there's no such entry and create new one. */
1513 enum elf_m68k_get_entry_howto
1514 {
1515 SEARCH,
1516 FIND_OR_CREATE,
1517 MUST_FIND,
1518 MUST_CREATE
1519 };
1520
1521 /* Get or create (depending on HOWTO) entry with KEY in GOT.
1522 INFO is context in which memory should be allocated (can be NULL if
1523 HOWTO is SEARCH or MUST_FIND). */
1524
1525 static struct elf_m68k_got_entry *
1526 elf_m68k_get_got_entry (struct elf_m68k_got *got,
1527 const struct elf_m68k_got_entry_key *key,
1528 enum elf_m68k_get_entry_howto howto,
1529 struct bfd_link_info *info)
1530 {
1531 struct elf_m68k_got_entry entry_;
1532 struct elf_m68k_got_entry *entry;
1533 void **ptr;
1534
1535 BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1536
1537 if (got->entries == NULL)
1538 /* This is the first entry in ABFD. Initialize hashtable. */
1539 {
1540 if (howto == SEARCH)
1541 return NULL;
1542
1543 got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT
1544 (info),
1545 elf_m68k_got_entry_hash,
1546 elf_m68k_got_entry_eq, NULL);
1547 if (got->entries == NULL)
1548 {
1549 bfd_set_error (bfd_error_no_memory);
1550 return NULL;
1551 }
1552 }
1553
1554 entry_.key_ = *key;
1555 ptr = htab_find_slot (got->entries, &entry_, (howto != SEARCH
1556 ? INSERT : NO_INSERT));
1557 if (ptr == NULL)
1558 {
1559 if (howto == SEARCH)
1560 /* Entry not found. */
1561 return NULL;
1562
1563 /* We're out of memory. */
1564 bfd_set_error (bfd_error_no_memory);
1565 return NULL;
1566 }
1567
1568 if (*ptr == NULL)
1569 /* We didn't find the entry and we're asked to create a new one. */
1570 {
1571 BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1572
1573 entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry));
1574 if (entry == NULL)
1575 return NULL;
1576
1577 /* Initialize new entry. */
1578 entry->key_ = *key;
1579
1580 entry->u.s1.refcount = 0;
1581
1582 /* Mark the entry as not initialized. */
1583 entry->key_.type = R_68K_max;
1584
1585 *ptr = entry;
1586 }
1587 else
1588 /* We found the entry. */
1589 {
1590 BFD_ASSERT (howto != MUST_CREATE);
1591
1592 entry = *ptr;
1593 }
1594
1595 return entry;
1596 }
1597
1598 /* Update GOT counters when merging entry of WAS type with entry of NEW type.
1599 Return the value to which ENTRY's type should be set. */
1600
1601 static enum elf_m68k_reloc_type
1602 elf_m68k_update_got_entry_type (struct elf_m68k_got *got,
1603 enum elf_m68k_reloc_type was,
1604 enum elf_m68k_reloc_type new_reloc)
1605 {
1606 enum elf_m68k_got_offset_size was_size;
1607 enum elf_m68k_got_offset_size new_size;
1608 bfd_vma n_slots;
1609
1610 if (was == R_68K_max)
1611 /* The type of the entry is not initialized yet. */
1612 {
1613 /* Update all got->n_slots counters, including n_slots[R_32]. */
1614 was_size = R_LAST;
1615
1616 was = new_reloc;
1617 }
1618 else
1619 {
1620 /* !!! We, probably, should emit an error rather then fail on assert
1621 in such a case. */
1622 BFD_ASSERT (elf_m68k_reloc_got_type (was)
1623 == elf_m68k_reloc_got_type (new_reloc));
1624
1625 was_size = elf_m68k_reloc_got_offset_size (was);
1626 }
1627
1628 new_size = elf_m68k_reloc_got_offset_size (new_reloc);
1629 n_slots = elf_m68k_reloc_got_n_slots (new_reloc);
1630
1631 while (was_size > new_size)
1632 {
1633 --was_size;
1634 got->n_slots[was_size] += n_slots;
1635 }
1636
1637 if (new_reloc > was)
1638 /* Relocations are ordered from bigger got offset size to lesser,
1639 so choose the relocation type with lesser offset size. */
1640 was = new_reloc;
1641
1642 return was;
1643 }
1644
1645 /* Update GOT counters when removing an entry of type TYPE. */
1646
1647 static void
1648 elf_m68k_remove_got_entry_type (struct elf_m68k_got *got,
1649 enum elf_m68k_reloc_type type)
1650 {
1651 enum elf_m68k_got_offset_size os;
1652 bfd_vma n_slots;
1653
1654 n_slots = elf_m68k_reloc_got_n_slots (type);
1655
1656 /* Decrese counter of slots with offset size corresponding to TYPE
1657 and all greater offset sizes. */
1658 for (os = elf_m68k_reloc_got_offset_size (type); os <= R_32; ++os)
1659 {
1660 BFD_ASSERT (got->n_slots[os] >= n_slots);
1661
1662 got->n_slots[os] -= n_slots;
1663 }
1664 }
1665
1666 /* Add new or update existing entry to GOT.
1667 H, ABFD, TYPE and SYMNDX is data for the entry.
1668 INFO is a context where memory should be allocated. */
1669
1670 static struct elf_m68k_got_entry *
1671 elf_m68k_add_entry_to_got (struct elf_m68k_got *got,
1672 struct elf_link_hash_entry *h,
1673 const bfd *abfd,
1674 enum elf_m68k_reloc_type reloc_type,
1675 unsigned long symndx,
1676 struct bfd_link_info *info)
1677 {
1678 struct elf_m68k_got_entry_key key_;
1679 struct elf_m68k_got_entry *entry;
1680
1681 if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0)
1682 elf_m68k_hash_entry (h)->got_entry_key
1683 = elf_m68k_multi_got (info)->global_symndx++;
1684
1685 elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type);
1686
1687 entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info);
1688 if (entry == NULL)
1689 return NULL;
1690
1691 /* Determine entry's type and update got->n_slots counters. */
1692 entry->key_.type = elf_m68k_update_got_entry_type (got,
1693 entry->key_.type,
1694 reloc_type);
1695
1696 /* Update refcount. */
1697 ++entry->u.s1.refcount;
1698
1699 if (entry->u.s1.refcount == 1)
1700 /* We see this entry for the first time. */
1701 {
1702 if (entry->key_.bfd != NULL)
1703 got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type);
1704 }
1705
1706 BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
1707
1708 if ((got->n_slots[R_8]
1709 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1710 || (got->n_slots[R_16]
1711 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1712 /* This BFD has too many relocation. */
1713 {
1714 if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1715 (*_bfd_error_handler) (_("%B: GOT overflow: "
1716 "Number of relocations with 8-bit "
1717 "offset > %d"),
1718 abfd,
1719 ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info));
1720 else
1721 (*_bfd_error_handler) (_("%B: GOT overflow: "
1722 "Number of relocations with 8- or 16-bit "
1723 "offset > %d"),
1724 abfd,
1725 ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info));
1726
1727 return NULL;
1728 }
1729
1730 return entry;
1731 }
1732
1733 /* Compute the hash value of the bfd in a bfd2got hash entry. */
1734
1735 static hashval_t
1736 elf_m68k_bfd2got_entry_hash (const void *entry)
1737 {
1738 const struct elf_m68k_bfd2got_entry *e;
1739
1740 e = (const struct elf_m68k_bfd2got_entry *) entry;
1741
1742 return e->bfd->id;
1743 }
1744
1745 /* Check whether two hash entries have the same bfd. */
1746
1747 static int
1748 elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2)
1749 {
1750 const struct elf_m68k_bfd2got_entry *e1;
1751 const struct elf_m68k_bfd2got_entry *e2;
1752
1753 e1 = (const struct elf_m68k_bfd2got_entry *) entry1;
1754 e2 = (const struct elf_m68k_bfd2got_entry *) entry2;
1755
1756 return e1->bfd == e2->bfd;
1757 }
1758
1759 /* Destruct a bfd2got entry. */
1760
1761 static void
1762 elf_m68k_bfd2got_entry_del (void *_entry)
1763 {
1764 struct elf_m68k_bfd2got_entry *entry;
1765
1766 entry = (struct elf_m68k_bfd2got_entry *) _entry;
1767
1768 BFD_ASSERT (entry->got != NULL);
1769 elf_m68k_clear_got (entry->got);
1770 }
1771
1772 /* Find existing or create new (depending on HOWTO) bfd2got entry in
1773 MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where
1774 memory should be allocated. */
1775
1776 static struct elf_m68k_bfd2got_entry *
1777 elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got,
1778 const bfd *abfd,
1779 enum elf_m68k_get_entry_howto howto,
1780 struct bfd_link_info *info)
1781 {
1782 struct elf_m68k_bfd2got_entry entry_;
1783 void **ptr;
1784 struct elf_m68k_bfd2got_entry *entry;
1785
1786 BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1787
1788 if (multi_got->bfd2got == NULL)
1789 /* This is the first GOT. Initialize bfd2got. */
1790 {
1791 if (howto == SEARCH)
1792 return NULL;
1793
1794 multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash,
1795 elf_m68k_bfd2got_entry_eq,
1796 elf_m68k_bfd2got_entry_del);
1797 if (multi_got->bfd2got == NULL)
1798 {
1799 bfd_set_error (bfd_error_no_memory);
1800 return NULL;
1801 }
1802 }
1803
1804 entry_.bfd = abfd;
1805 ptr = htab_find_slot (multi_got->bfd2got, &entry_, (howto != SEARCH
1806 ? INSERT : NO_INSERT));
1807 if (ptr == NULL)
1808 {
1809 if (howto == SEARCH)
1810 /* Entry not found. */
1811 return NULL;
1812
1813 /* We're out of memory. */
1814 bfd_set_error (bfd_error_no_memory);
1815 return NULL;
1816 }
1817
1818 if (*ptr == NULL)
1819 /* Entry was not found. Create new one. */
1820 {
1821 BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1822
1823 entry = ((struct elf_m68k_bfd2got_entry *)
1824 bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)));
1825 if (entry == NULL)
1826 return NULL;
1827
1828 entry->bfd = abfd;
1829
1830 entry->got = elf_m68k_create_empty_got (info);
1831 if (entry->got == NULL)
1832 return NULL;
1833
1834 *ptr = entry;
1835 }
1836 else
1837 {
1838 BFD_ASSERT (howto != MUST_CREATE);
1839
1840 /* Return existing entry. */
1841 entry = *ptr;
1842 }
1843
1844 return entry;
1845 }
1846
1847 struct elf_m68k_can_merge_gots_arg
1848 {
1849 /* A current_got that we constructing a DIFF against. */
1850 struct elf_m68k_got *big;
1851
1852 /* GOT holding entries not present or that should be changed in
1853 BIG. */
1854 struct elf_m68k_got *diff;
1855
1856 /* Context where to allocate memory. */
1857 struct bfd_link_info *info;
1858
1859 /* Error flag. */
1860 bfd_boolean error_p;
1861 };
1862
1863 /* Process a single entry from the small GOT to see if it should be added
1864 or updated in the big GOT. */
1865
1866 static int
1867 elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg)
1868 {
1869 const struct elf_m68k_got_entry *entry1;
1870 struct elf_m68k_can_merge_gots_arg *arg;
1871 const struct elf_m68k_got_entry *entry2;
1872 enum elf_m68k_reloc_type type;
1873
1874 entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr;
1875 arg = (struct elf_m68k_can_merge_gots_arg *) _arg;
1876
1877 entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL);
1878
1879 if (entry2 != NULL)
1880 /* We found an existing entry. Check if we should update it. */
1881 {
1882 type = elf_m68k_update_got_entry_type (arg->diff,
1883 entry2->key_.type,
1884 entry1->key_.type);
1885
1886 if (type == entry2->key_.type)
1887 /* ENTRY1 doesn't update data in ENTRY2. Skip it.
1888 To skip creation of difference entry we use the type,
1889 which we won't see in GOT entries for sure. */
1890 type = R_68K_max;
1891 }
1892 else
1893 /* We didn't find the entry. Add entry1 to DIFF. */
1894 {
1895 BFD_ASSERT (entry1->key_.type != R_68K_max);
1896
1897 type = elf_m68k_update_got_entry_type (arg->diff,
1898 R_68K_max, entry1->key_.type);
1899
1900 if (entry1->key_.bfd != NULL)
1901 arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type);
1902 }
1903
1904 if (type != R_68K_max)
1905 /* Create an entry in DIFF. */
1906 {
1907 struct elf_m68k_got_entry *entry;
1908
1909 entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE,
1910 arg->info);
1911 if (entry == NULL)
1912 {
1913 arg->error_p = TRUE;
1914 return 0;
1915 }
1916
1917 entry->key_.type = type;
1918 }
1919
1920 return 1;
1921 }
1922
1923 /* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it.
1924 Construct DIFF GOT holding the entries which should be added or updated
1925 in BIG GOT to accumulate information from SMALL.
1926 INFO is the context where memory should be allocated. */
1927
1928 static bfd_boolean
1929 elf_m68k_can_merge_gots (struct elf_m68k_got *big,
1930 const struct elf_m68k_got *small,
1931 struct bfd_link_info *info,
1932 struct elf_m68k_got *diff)
1933 {
1934 struct elf_m68k_can_merge_gots_arg arg_;
1935
1936 BFD_ASSERT (small->offset == (bfd_vma) -1);
1937
1938 arg_.big = big;
1939 arg_.diff = diff;
1940 arg_.info = info;
1941 arg_.error_p = FALSE;
1942 htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_);
1943 if (arg_.error_p)
1944 {
1945 diff->offset = 0;
1946 return FALSE;
1947 }
1948
1949 /* Check for overflow. */
1950 if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8]
1951 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1952 || (big->n_slots[R_16] + arg_.diff->n_slots[R_16]
1953 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1954 return FALSE;
1955
1956 return TRUE;
1957 }
1958
1959 struct elf_m68k_merge_gots_arg
1960 {
1961 /* The BIG got. */
1962 struct elf_m68k_got *big;
1963
1964 /* Context where memory should be allocated. */
1965 struct bfd_link_info *info;
1966
1967 /* Error flag. */
1968 bfd_boolean error_p;
1969 };
1970
1971 /* Process a single entry from DIFF got. Add or update corresponding
1972 entry in the BIG got. */
1973
1974 static int
1975 elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg)
1976 {
1977 const struct elf_m68k_got_entry *from;
1978 struct elf_m68k_merge_gots_arg *arg;
1979 struct elf_m68k_got_entry *to;
1980
1981 from = (const struct elf_m68k_got_entry *) *entry_ptr;
1982 arg = (struct elf_m68k_merge_gots_arg *) _arg;
1983
1984 to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE,
1985 arg->info);
1986 if (to == NULL)
1987 {
1988 arg->error_p = TRUE;
1989 return 0;
1990 }
1991
1992 BFD_ASSERT (to->u.s1.refcount == 0);
1993 /* All we need to merge is TYPE. */
1994 to->key_.type = from->key_.type;
1995
1996 return 1;
1997 }
1998
1999 /* Merge data from DIFF to BIG. INFO is context where memory should be
2000 allocated. */
2001
2002 static bfd_boolean
2003 elf_m68k_merge_gots (struct elf_m68k_got *big,
2004 struct elf_m68k_got *diff,
2005 struct bfd_link_info *info)
2006 {
2007 if (diff->entries != NULL)
2008 /* DIFF is not empty. Merge it into BIG GOT. */
2009 {
2010 struct elf_m68k_merge_gots_arg arg_;
2011
2012 /* Merge entries. */
2013 arg_.big = big;
2014 arg_.info = info;
2015 arg_.error_p = FALSE;
2016 htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_);
2017 if (arg_.error_p)
2018 return FALSE;
2019
2020 /* Merge counters. */
2021 big->n_slots[R_8] += diff->n_slots[R_8];
2022 big->n_slots[R_16] += diff->n_slots[R_16];
2023 big->n_slots[R_32] += diff->n_slots[R_32];
2024 big->local_n_slots += diff->local_n_slots;
2025 }
2026 else
2027 /* DIFF is empty. */
2028 {
2029 BFD_ASSERT (diff->n_slots[R_8] == 0);
2030 BFD_ASSERT (diff->n_slots[R_16] == 0);
2031 BFD_ASSERT (diff->n_slots[R_32] == 0);
2032 BFD_ASSERT (diff->local_n_slots == 0);
2033 }
2034
2035 BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p
2036 || ((big->n_slots[R_8]
2037 <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
2038 && (big->n_slots[R_16]
2039 <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))));
2040
2041 return TRUE;
2042 }
2043
2044 struct elf_m68k_finalize_got_offsets_arg
2045 {
2046 /* Ranges of the offsets for GOT entries.
2047 R_x entries receive offsets between offset1[R_x] and offset2[R_x].
2048 R_x is R_8, R_16 and R_32. */
2049 bfd_vma *offset1;
2050 bfd_vma *offset2;
2051
2052 /* Mapping from global symndx to global symbols.
2053 This is used to build lists of got entries for global symbols. */
2054 struct elf_m68k_link_hash_entry **symndx2h;
2055
2056 bfd_vma n_ldm_entries;
2057 };
2058
2059 /* Assign ENTRY an offset. Build list of GOT entries for global symbols
2060 along the way. */
2061
2062 static int
2063 elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg)
2064 {
2065 struct elf_m68k_got_entry *entry;
2066 struct elf_m68k_finalize_got_offsets_arg *arg;
2067
2068 enum elf_m68k_got_offset_size got_offset_size;
2069 bfd_vma entry_size;
2070
2071 entry = (struct elf_m68k_got_entry *) *entry_ptr;
2072 arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg;
2073
2074 /* This should be a fresh entry created in elf_m68k_can_merge_gots. */
2075 BFD_ASSERT (entry->u.s1.refcount == 0);
2076
2077 /* Get GOT offset size for the entry . */
2078 got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type);
2079
2080 /* Calculate entry size in bytes. */
2081 entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type);
2082
2083 /* Check if we should switch to negative range of the offsets. */
2084 if (arg->offset1[got_offset_size] + entry_size
2085 > arg->offset2[got_offset_size])
2086 {
2087 /* Verify that this is the only switch to negative range for
2088 got_offset_size. If this assertion fails, then we've miscalculated
2089 range for got_offset_size entries in
2090 elf_m68k_finalize_got_offsets. */
2091 BFD_ASSERT (arg->offset2[got_offset_size]
2092 != arg->offset2[-(int) got_offset_size - 1]);
2093
2094 /* Switch. */
2095 arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1];
2096 arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1];
2097
2098 /* Verify that now we have enough room for the entry. */
2099 BFD_ASSERT (arg->offset1[got_offset_size] + entry_size
2100 <= arg->offset2[got_offset_size]);
2101 }
2102
2103 /* Assign offset to entry. */
2104 entry->u.s2.offset = arg->offset1[got_offset_size];
2105 arg->offset1[got_offset_size] += entry_size;
2106
2107 if (entry->key_.bfd == NULL)
2108 /* Hook up this entry into the list of got_entries of H. */
2109 {
2110 struct elf_m68k_link_hash_entry *h;
2111
2112 h = arg->symndx2h[entry->key_.symndx];
2113 if (h != NULL)
2114 {
2115 entry->u.s2.next = h->glist;
2116 h->glist = entry;
2117 }
2118 else
2119 /* This should be the entry for TLS_LDM relocation then. */
2120 {
2121 BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type)
2122 == R_68K_TLS_LDM32)
2123 && entry->key_.symndx == 0);
2124
2125 ++arg->n_ldm_entries;
2126 }
2127 }
2128 else
2129 /* This entry is for local symbol. */
2130 entry->u.s2.next = NULL;
2131
2132 return 1;
2133 }
2134
2135 /* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we
2136 should use negative offsets.
2137 Build list of GOT entries for global symbols along the way.
2138 SYMNDX2H is mapping from global symbol indices to actual
2139 global symbols.
2140 Return offset at which next GOT should start. */
2141
2142 static void
2143 elf_m68k_finalize_got_offsets (struct elf_m68k_got *got,
2144 bfd_boolean use_neg_got_offsets_p,
2145 struct elf_m68k_link_hash_entry **symndx2h,
2146 bfd_vma *final_offset, bfd_vma *n_ldm_entries)
2147 {
2148 struct elf_m68k_finalize_got_offsets_arg arg_;
2149 bfd_vma offset1_[2 * R_LAST];
2150 bfd_vma offset2_[2 * R_LAST];
2151 int i;
2152 bfd_vma start_offset;
2153
2154 BFD_ASSERT (got->offset != (bfd_vma) -1);
2155
2156 /* We set entry offsets relative to the .got section (and not the
2157 start of a particular GOT), so that we can use them in
2158 finish_dynamic_symbol without needing to know the GOT which they come
2159 from. */
2160
2161 /* Put offset1 in the middle of offset1_, same for offset2. */
2162 arg_.offset1 = offset1_ + R_LAST;
2163 arg_.offset2 = offset2_ + R_LAST;
2164
2165 start_offset = got->offset;
2166
2167 if (use_neg_got_offsets_p)
2168 /* Setup both negative and positive ranges for R_8, R_16 and R_32. */
2169 i = -(int) R_32 - 1;
2170 else
2171 /* Setup positives ranges for R_8, R_16 and R_32. */
2172 i = (int) R_8;
2173
2174 for (; i <= (int) R_32; ++i)
2175 {
2176 int j;
2177 size_t n;
2178
2179 /* Set beginning of the range of offsets I. */
2180 arg_.offset1[i] = start_offset;
2181
2182 /* Calculate number of slots that require I offsets. */
2183 j = (i >= 0) ? i : -i - 1;
2184 n = (j >= 1) ? got->n_slots[j - 1] : 0;
2185 n = got->n_slots[j] - n;
2186
2187 if (use_neg_got_offsets_p && n != 0)
2188 {
2189 if (i < 0)
2190 /* We first fill the positive side of the range, so we might
2191 end up with one empty slot at that side when we can't fit
2192 whole 2-slot entry. Account for that at negative side of
2193 the interval with one additional entry. */
2194 n = n / 2 + 1;
2195 else
2196 /* When the number of slots is odd, make positive side of the
2197 range one entry bigger. */
2198 n = (n + 1) / 2;
2199 }
2200
2201 /* N is the number of slots that require I offsets.
2202 Calculate length of the range for I offsets. */
2203 n = 4 * n;
2204
2205 /* Set end of the range. */
2206 arg_.offset2[i] = start_offset + n;
2207
2208 start_offset = arg_.offset2[i];
2209 }
2210
2211 if (!use_neg_got_offsets_p)
2212 /* Make sure that if we try to switch to negative offsets in
2213 elf_m68k_finalize_got_offsets_1, the assert therein will catch
2214 the bug. */
2215 for (i = R_8; i <= R_32; ++i)
2216 arg_.offset2[-i - 1] = arg_.offset2[i];
2217
2218 /* Setup got->offset. offset1[R_8] is either in the middle or at the
2219 beginning of GOT depending on use_neg_got_offsets_p. */
2220 got->offset = arg_.offset1[R_8];
2221
2222 arg_.symndx2h = symndx2h;
2223 arg_.n_ldm_entries = 0;
2224
2225 /* Assign offsets. */
2226 htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_);
2227
2228 /* Check offset ranges we have actually assigned. */
2229 for (i = (int) R_8; i <= (int) R_32; ++i)
2230 BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4);
2231
2232 *final_offset = start_offset;
2233 *n_ldm_entries = arg_.n_ldm_entries;
2234 }
2235
2236 struct elf_m68k_partition_multi_got_arg
2237 {
2238 /* The GOT we are adding entries to. Aka big got. */
2239 struct elf_m68k_got *current_got;
2240
2241 /* Offset to assign the next CURRENT_GOT. */
2242 bfd_vma offset;
2243
2244 /* Context where memory should be allocated. */
2245 struct bfd_link_info *info;
2246
2247 /* Total number of slots in the .got section.
2248 This is used to calculate size of the .got and .rela.got sections. */
2249 bfd_vma n_slots;
2250
2251 /* Difference in numbers of allocated slots in the .got section
2252 and necessary relocations in the .rela.got section.
2253 This is used to calculate size of the .rela.got section. */
2254 bfd_vma slots_relas_diff;
2255
2256 /* Error flag. */
2257 bfd_boolean error_p;
2258
2259 /* Mapping from global symndx to global symbols.
2260 This is used to build lists of got entries for global symbols. */
2261 struct elf_m68k_link_hash_entry **symndx2h;
2262 };
2263
2264 static void
2265 elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg)
2266 {
2267 bfd_vma n_ldm_entries;
2268
2269 elf_m68k_finalize_got_offsets (arg->current_got,
2270 (elf_m68k_hash_table (arg->info)
2271 ->use_neg_got_offsets_p),
2272 arg->symndx2h,
2273 &arg->offset, &n_ldm_entries);
2274
2275 arg->n_slots += arg->current_got->n_slots[R_32];
2276
2277 if (!arg->info->shared)
2278 /* If we are generating a shared object, we need to
2279 output a R_68K_RELATIVE reloc so that the dynamic
2280 linker can adjust this GOT entry. Overwise we
2281 don't need space in .rela.got for local symbols. */
2282 arg->slots_relas_diff += arg->current_got->local_n_slots;
2283
2284 /* @LDM relocations require a 2-slot GOT entry, but only
2285 one relocation. Account for that. */
2286 arg->slots_relas_diff += n_ldm_entries;
2287
2288 BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots);
2289 }
2290
2291
2292 /* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT
2293 or start a new CURRENT_GOT. */
2294
2295 static int
2296 elf_m68k_partition_multi_got_1 (void **_entry, void *_arg)
2297 {
2298 struct elf_m68k_bfd2got_entry *entry;
2299 struct elf_m68k_partition_multi_got_arg *arg;
2300 struct elf_m68k_got *got;
2301 struct elf_m68k_got diff_;
2302 struct elf_m68k_got *diff;
2303
2304 entry = (struct elf_m68k_bfd2got_entry *) *_entry;
2305 arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2306
2307 got = entry->got;
2308 BFD_ASSERT (got != NULL);
2309 BFD_ASSERT (got->offset == (bfd_vma) -1);
2310
2311 diff = NULL;
2312
2313 if (arg->current_got != NULL)
2314 /* Construct diff. */
2315 {
2316 diff = &diff_;
2317 elf_m68k_init_got (diff);
2318
2319 if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff))
2320 {
2321 if (diff->offset == 0)
2322 /* Offset set to 0 in the diff_ indicates an error. */
2323 {
2324 arg->error_p = TRUE;
2325 goto final_return;
2326 }
2327
2328 if (elf_m68k_hash_table (arg->info)->allow_multigot_p)
2329 {
2330 elf_m68k_clear_got (diff);
2331 /* Schedule to finish up current_got and start new one. */
2332 diff = NULL;
2333 }
2334 /* else
2335 Merge GOTs no matter what. If big GOT overflows,
2336 we'll fail in relocate_section due to truncated relocations.
2337
2338 ??? May be fail earlier? E.g., in can_merge_gots. */
2339 }
2340 }
2341 else
2342 /* Diff of got against empty current_got is got itself. */
2343 {
2344 /* Create empty current_got to put subsequent GOTs to. */
2345 arg->current_got = elf_m68k_create_empty_got (arg->info);
2346 if (arg->current_got == NULL)
2347 {
2348 arg->error_p = TRUE;
2349 goto final_return;
2350 }
2351
2352 arg->current_got->offset = arg->offset;
2353
2354 diff = got;
2355 }
2356
2357 if (diff != NULL)
2358 {
2359 if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info))
2360 {
2361 arg->error_p = TRUE;
2362 goto final_return;
2363 }
2364
2365 /* Now we can free GOT. */
2366 elf_m68k_clear_got (got);
2367
2368 entry->got = arg->current_got;
2369 }
2370 else
2371 {
2372 /* Finish up current_got. */
2373 elf_m68k_partition_multi_got_2 (arg);
2374
2375 /* Schedule to start a new current_got. */
2376 arg->current_got = NULL;
2377
2378 /* Retry. */
2379 if (!elf_m68k_partition_multi_got_1 (_entry, _arg))
2380 {
2381 BFD_ASSERT (arg->error_p);
2382 goto final_return;
2383 }
2384 }
2385
2386 final_return:
2387 if (diff != NULL)
2388 elf_m68k_clear_got (diff);
2389
2390 return arg->error_p == FALSE ? 1 : 0;
2391 }
2392
2393 /* Helper function to build symndx2h mapping. */
2394
2395 static bfd_boolean
2396 elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h,
2397 void *_arg)
2398 {
2399 struct elf_m68k_link_hash_entry *h;
2400
2401 h = elf_m68k_hash_entry (_h);
2402
2403 if (h->got_entry_key != 0)
2404 /* H has at least one entry in the GOT. */
2405 {
2406 struct elf_m68k_partition_multi_got_arg *arg;
2407
2408 arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2409
2410 BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL);
2411 arg->symndx2h[h->got_entry_key] = h;
2412 }
2413
2414 return TRUE;
2415 }
2416
2417 /* Merge GOTs of some BFDs, assign offsets to GOT entries and build
2418 lists of GOT entries for global symbols.
2419 Calculate sizes of .got and .rela.got sections. */
2420
2421 static bfd_boolean
2422 elf_m68k_partition_multi_got (struct bfd_link_info *info)
2423 {
2424 struct elf_m68k_multi_got *multi_got;
2425 struct elf_m68k_partition_multi_got_arg arg_;
2426
2427 multi_got = elf_m68k_multi_got (info);
2428
2429 arg_.current_got = NULL;
2430 arg_.offset = 0;
2431 arg_.info = info;
2432 arg_.n_slots = 0;
2433 arg_.slots_relas_diff = 0;
2434 arg_.error_p = FALSE;
2435
2436 if (multi_got->bfd2got != NULL)
2437 {
2438 /* Initialize symndx2h mapping. */
2439 {
2440 arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx
2441 * sizeof (*arg_.symndx2h));
2442 if (arg_.symndx2h == NULL)
2443 return FALSE;
2444
2445 elf_link_hash_traverse (elf_hash_table (info),
2446 elf_m68k_init_symndx2h_1, &arg_);
2447 }
2448
2449 /* Partition. */
2450 htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1,
2451 &arg_);
2452 if (arg_.error_p)
2453 {
2454 free (arg_.symndx2h);
2455 arg_.symndx2h = NULL;
2456
2457 return FALSE;
2458 }
2459
2460 /* Finish up last current_got. */
2461 elf_m68k_partition_multi_got_2 (&arg_);
2462
2463 free (arg_.symndx2h);
2464 }
2465
2466 if (elf_hash_table (info)->dynobj != NULL)
2467 /* Set sizes of .got and .rela.got sections. */
2468 {
2469 asection *s;
2470
2471 s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".got");
2472 if (s != NULL)
2473 s->size = arg_.offset;
2474 else
2475 BFD_ASSERT (arg_.offset == 0);
2476
2477 BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots);
2478 arg_.n_slots -= arg_.slots_relas_diff;
2479
2480 s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".rela.got");
2481 if (s != NULL)
2482 s->size = arg_.n_slots * sizeof (Elf32_External_Rela);
2483 else
2484 BFD_ASSERT (arg_.n_slots == 0);
2485 }
2486 else
2487 BFD_ASSERT (multi_got->bfd2got == NULL);
2488
2489 return TRUE;
2490 }
2491
2492 /* Specialized version of elf_m68k_get_got_entry that returns pointer
2493 to hashtable slot, thus allowing removal of entry via
2494 elf_m68k_remove_got_entry. */
2495
2496 static struct elf_m68k_got_entry **
2497 elf_m68k_find_got_entry_ptr (struct elf_m68k_got *got,
2498 struct elf_m68k_got_entry_key *key)
2499 {
2500 void **ptr;
2501 struct elf_m68k_got_entry entry_;
2502 struct elf_m68k_got_entry **entry_ptr;
2503
2504 entry_.key_ = *key;
2505 ptr = htab_find_slot (got->entries, &entry_, NO_INSERT);
2506 BFD_ASSERT (ptr != NULL);
2507
2508 entry_ptr = (struct elf_m68k_got_entry **) ptr;
2509
2510 return entry_ptr;
2511 }
2512
2513 /* Remove entry pointed to by ENTRY_PTR from GOT. */
2514
2515 static void
2516 elf_m68k_remove_got_entry (struct elf_m68k_got *got,
2517 struct elf_m68k_got_entry **entry_ptr)
2518 {
2519 struct elf_m68k_got_entry *entry;
2520
2521 entry = *entry_ptr;
2522
2523 /* Check that offsets have not been finalized yet. */
2524 BFD_ASSERT (got->offset == (bfd_vma) -1);
2525 /* Check that this entry is indeed unused. */
2526 BFD_ASSERT (entry->u.s1.refcount == 0);
2527
2528 elf_m68k_remove_got_entry_type (got, entry->key_.type);
2529
2530 if (entry->key_.bfd != NULL)
2531 got->local_n_slots -= elf_m68k_reloc_got_n_slots (entry->key_.type);
2532
2533 BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
2534
2535 htab_clear_slot (got->entries, (void **) entry_ptr);
2536 }
2537
2538 /* Copy any information related to dynamic linking from a pre-existing
2539 symbol to a newly created symbol. Also called to copy flags and
2540 other back-end info to a weakdef, in which case the symbol is not
2541 newly created and plt/got refcounts and dynamic indices should not
2542 be copied. */
2543
2544 static void
2545 elf_m68k_copy_indirect_symbol (struct bfd_link_info *info,
2546 struct elf_link_hash_entry *_dir,
2547 struct elf_link_hash_entry *_ind)
2548 {
2549 struct elf_m68k_link_hash_entry *dir;
2550 struct elf_m68k_link_hash_entry *ind;
2551
2552 _bfd_elf_link_hash_copy_indirect (info, _dir, _ind);
2553
2554 if (_ind->root.type != bfd_link_hash_indirect)
2555 return;
2556
2557 dir = elf_m68k_hash_entry (_dir);
2558 ind = elf_m68k_hash_entry (_ind);
2559
2560 /* Any absolute non-dynamic relocations against an indirect or weak
2561 definition will be against the target symbol. */
2562 _dir->non_got_ref |= _ind->non_got_ref;
2563
2564 /* We might have a direct symbol already having entries in the GOTs.
2565 Update its key only in case indirect symbol has GOT entries and
2566 assert that both indirect and direct symbols don't have GOT entries
2567 at the same time. */
2568 if (ind->got_entry_key != 0)
2569 {
2570 BFD_ASSERT (dir->got_entry_key == 0);
2571 /* Assert that GOTs aren't partioned yet. */
2572 BFD_ASSERT (ind->glist == NULL);
2573
2574 dir->got_entry_key = ind->got_entry_key;
2575 ind->got_entry_key = 0;
2576 }
2577 }
2578
2579 /* Look through the relocs for a section during the first phase, and
2580 allocate space in the global offset table or procedure linkage
2581 table. */
2582
2583 static bfd_boolean
2584 elf_m68k_check_relocs (abfd, info, sec, relocs)
2585 bfd *abfd;
2586 struct bfd_link_info *info;
2587 asection *sec;
2588 const Elf_Internal_Rela *relocs;
2589 {
2590 bfd *dynobj;
2591 Elf_Internal_Shdr *symtab_hdr;
2592 struct elf_link_hash_entry **sym_hashes;
2593 const Elf_Internal_Rela *rel;
2594 const Elf_Internal_Rela *rel_end;
2595 asection *sgot;
2596 asection *srelgot;
2597 asection *sreloc;
2598 struct elf_m68k_got *got;
2599
2600 if (info->relocatable)
2601 return TRUE;
2602
2603 dynobj = elf_hash_table (info)->dynobj;
2604 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2605 sym_hashes = elf_sym_hashes (abfd);
2606
2607 sgot = NULL;
2608 srelgot = NULL;
2609 sreloc = NULL;
2610
2611 got = NULL;
2612
2613 rel_end = relocs + sec->reloc_count;
2614 for (rel = relocs; rel < rel_end; rel++)
2615 {
2616 unsigned long r_symndx;
2617 struct elf_link_hash_entry *h;
2618
2619 r_symndx = ELF32_R_SYM (rel->r_info);
2620
2621 if (r_symndx < symtab_hdr->sh_info)
2622 h = NULL;
2623 else
2624 {
2625 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2626 while (h->root.type == bfd_link_hash_indirect
2627 || h->root.type == bfd_link_hash_warning)
2628 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2629 }
2630
2631 switch (ELF32_R_TYPE (rel->r_info))
2632 {
2633 case R_68K_GOT8:
2634 case R_68K_GOT16:
2635 case R_68K_GOT32:
2636 if (h != NULL
2637 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2638 break;
2639 /* Fall through. */
2640
2641 /* Relative GOT relocations. */
2642 case R_68K_GOT8O:
2643 case R_68K_GOT16O:
2644 case R_68K_GOT32O:
2645 /* Fall through. */
2646
2647 /* TLS relocations. */
2648 case R_68K_TLS_GD8:
2649 case R_68K_TLS_GD16:
2650 case R_68K_TLS_GD32:
2651 case R_68K_TLS_LDM8:
2652 case R_68K_TLS_LDM16:
2653 case R_68K_TLS_LDM32:
2654 case R_68K_TLS_IE8:
2655 case R_68K_TLS_IE16:
2656 case R_68K_TLS_IE32:
2657
2658 case R_68K_TLS_TPREL32:
2659 case R_68K_TLS_DTPREL32:
2660
2661 if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32
2662 && info->shared)
2663 /* Do the special chorus for libraries with static TLS. */
2664 info->flags |= DF_STATIC_TLS;
2665
2666 /* This symbol requires a global offset table entry. */
2667
2668 if (dynobj == NULL)
2669 {
2670 /* Create the .got section. */
2671 elf_hash_table (info)->dynobj = dynobj = abfd;
2672 if (!_bfd_elf_create_got_section (dynobj, info))
2673 return FALSE;
2674 }
2675
2676 if (sgot == NULL)
2677 {
2678 sgot = bfd_get_section_by_name (dynobj, ".got");
2679 BFD_ASSERT (sgot != NULL);
2680 }
2681
2682 if (srelgot == NULL
2683 && (h != NULL || info->shared))
2684 {
2685 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2686 if (srelgot == NULL)
2687 {
2688 srelgot = bfd_make_section_with_flags (dynobj,
2689 ".rela.got",
2690 (SEC_ALLOC
2691 | SEC_LOAD
2692 | SEC_HAS_CONTENTS
2693 | SEC_IN_MEMORY
2694 | SEC_LINKER_CREATED
2695 | SEC_READONLY));
2696 if (srelgot == NULL
2697 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2698 return FALSE;
2699 }
2700 }
2701
2702 if (got == NULL)
2703 {
2704 struct elf_m68k_bfd2got_entry *bfd2got_entry;
2705
2706 bfd2got_entry
2707 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2708 abfd, FIND_OR_CREATE, info);
2709 if (bfd2got_entry == NULL)
2710 return FALSE;
2711
2712 got = bfd2got_entry->got;
2713 BFD_ASSERT (got != NULL);
2714 }
2715
2716 {
2717 struct elf_m68k_got_entry *got_entry;
2718
2719 /* Add entry to got. */
2720 got_entry = elf_m68k_add_entry_to_got (got, h, abfd,
2721 ELF32_R_TYPE (rel->r_info),
2722 r_symndx, info);
2723 if (got_entry == NULL)
2724 return FALSE;
2725
2726 if (got_entry->u.s1.refcount == 1)
2727 {
2728 /* Make sure this symbol is output as a dynamic symbol. */
2729 if (h != NULL
2730 && h->dynindx == -1
2731 && !h->forced_local)
2732 {
2733 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2734 return FALSE;
2735 }
2736 }
2737 }
2738
2739 break;
2740
2741 case R_68K_PLT8:
2742 case R_68K_PLT16:
2743 case R_68K_PLT32:
2744 /* This symbol requires a procedure linkage table entry. We
2745 actually build the entry in adjust_dynamic_symbol,
2746 because this might be a case of linking PIC code which is
2747 never referenced by a dynamic object, in which case we
2748 don't need to generate a procedure linkage table entry
2749 after all. */
2750
2751 /* If this is a local symbol, we resolve it directly without
2752 creating a procedure linkage table entry. */
2753 if (h == NULL)
2754 continue;
2755
2756 h->needs_plt = 1;
2757 h->plt.refcount++;
2758 break;
2759
2760 case R_68K_PLT8O:
2761 case R_68K_PLT16O:
2762 case R_68K_PLT32O:
2763 /* This symbol requires a procedure linkage table entry. */
2764
2765 if (h == NULL)
2766 {
2767 /* It does not make sense to have this relocation for a
2768 local symbol. FIXME: does it? How to handle it if
2769 it does make sense? */
2770 bfd_set_error (bfd_error_bad_value);
2771 return FALSE;
2772 }
2773
2774 /* Make sure this symbol is output as a dynamic symbol. */
2775 if (h->dynindx == -1
2776 && !h->forced_local)
2777 {
2778 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2779 return FALSE;
2780 }
2781
2782 h->needs_plt = 1;
2783 h->plt.refcount++;
2784 break;
2785
2786 case R_68K_PC8:
2787 case R_68K_PC16:
2788 case R_68K_PC32:
2789 /* If we are creating a shared library and this is not a local
2790 symbol, we need to copy the reloc into the shared library.
2791 However when linking with -Bsymbolic and this is a global
2792 symbol which is defined in an object we are including in the
2793 link (i.e., DEF_REGULAR is set), then we can resolve the
2794 reloc directly. At this point we have not seen all the input
2795 files, so it is possible that DEF_REGULAR is not set now but
2796 will be set later (it is never cleared). We account for that
2797 possibility below by storing information in the
2798 pcrel_relocs_copied field of the hash table entry. */
2799 if (!(info->shared
2800 && (sec->flags & SEC_ALLOC) != 0
2801 && h != NULL
2802 && (!info->symbolic
2803 || h->root.type == bfd_link_hash_defweak
2804 || !h->def_regular)))
2805 {
2806 if (h != NULL)
2807 {
2808 /* Make sure a plt entry is created for this symbol if
2809 it turns out to be a function defined by a dynamic
2810 object. */
2811 h->plt.refcount++;
2812 }
2813 break;
2814 }
2815 /* Fall through. */
2816 case R_68K_8:
2817 case R_68K_16:
2818 case R_68K_32:
2819 if (h != NULL)
2820 {
2821 /* Make sure a plt entry is created for this symbol if it
2822 turns out to be a function defined by a dynamic object. */
2823 h->plt.refcount++;
2824
2825 if (!info->shared)
2826 /* This symbol needs a non-GOT reference. */
2827 h->non_got_ref = 1;
2828 }
2829
2830 /* If we are creating a shared library, we need to copy the
2831 reloc into the shared library. */
2832 if (info->shared
2833 && (sec->flags & SEC_ALLOC) != 0)
2834 {
2835 /* When creating a shared object, we must copy these
2836 reloc types into the output file. We create a reloc
2837 section in dynobj and make room for this reloc. */
2838 if (sreloc == NULL)
2839 {
2840 sreloc = _bfd_elf_make_dynamic_reloc_section
2841 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
2842
2843 if (sreloc == NULL)
2844 return FALSE;
2845 }
2846
2847 if (sec->flags & SEC_READONLY
2848 /* Don't set DF_TEXTREL yet for PC relative
2849 relocations, they might be discarded later. */
2850 && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2851 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2852 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32))
2853 info->flags |= DF_TEXTREL;
2854
2855 sreloc->size += sizeof (Elf32_External_Rela);
2856
2857 /* We count the number of PC relative relocations we have
2858 entered for this symbol, so that we can discard them
2859 again if, in the -Bsymbolic case, the symbol is later
2860 defined by a regular object, or, in the normal shared
2861 case, the symbol is forced to be local. Note that this
2862 function is only called if we are using an m68kelf linker
2863 hash table, which means that h is really a pointer to an
2864 elf_m68k_link_hash_entry. */
2865 if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2866 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2867 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
2868 {
2869 struct elf_m68k_pcrel_relocs_copied *p;
2870 struct elf_m68k_pcrel_relocs_copied **head;
2871
2872 if (h != NULL)
2873 {
2874 struct elf_m68k_link_hash_entry *eh
2875 = elf_m68k_hash_entry (h);
2876 head = &eh->pcrel_relocs_copied;
2877 }
2878 else
2879 {
2880 asection *s;
2881 void *vpp;
2882 Elf_Internal_Sym *isym;
2883
2884 isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->sym_cache,
2885 abfd, r_symndx);
2886 if (isym == NULL)
2887 return FALSE;
2888
2889 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2890 if (s == NULL)
2891 s = sec;
2892
2893 vpp = &elf_section_data (s)->local_dynrel;
2894 head = (struct elf_m68k_pcrel_relocs_copied **) vpp;
2895 }
2896
2897 for (p = *head; p != NULL; p = p->next)
2898 if (p->section == sreloc)
2899 break;
2900
2901 if (p == NULL)
2902 {
2903 p = ((struct elf_m68k_pcrel_relocs_copied *)
2904 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2905 if (p == NULL)
2906 return FALSE;
2907 p->next = *head;
2908 *head = p;
2909 p->section = sreloc;
2910 p->count = 0;
2911 }
2912
2913 ++p->count;
2914 }
2915 }
2916
2917 break;
2918
2919 /* This relocation describes the C++ object vtable hierarchy.
2920 Reconstruct it for later use during GC. */
2921 case R_68K_GNU_VTINHERIT:
2922 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2923 return FALSE;
2924 break;
2925
2926 /* This relocation describes which C++ vtable entries are actually
2927 used. Record for later use during GC. */
2928 case R_68K_GNU_VTENTRY:
2929 BFD_ASSERT (h != NULL);
2930 if (h != NULL
2931 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2932 return FALSE;
2933 break;
2934
2935 default:
2936 break;
2937 }
2938 }
2939
2940 return TRUE;
2941 }
2942
2943 /* Return the section that should be marked against GC for a given
2944 relocation. */
2945
2946 static asection *
2947 elf_m68k_gc_mark_hook (asection *sec,
2948 struct bfd_link_info *info,
2949 Elf_Internal_Rela *rel,
2950 struct elf_link_hash_entry *h,
2951 Elf_Internal_Sym *sym)
2952 {
2953 if (h != NULL)
2954 switch (ELF32_R_TYPE (rel->r_info))
2955 {
2956 case R_68K_GNU_VTINHERIT:
2957 case R_68K_GNU_VTENTRY:
2958 return NULL;
2959 }
2960
2961 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2962 }
2963
2964 /* Update the got entry reference counts for the section being removed. */
2965
2966 static bfd_boolean
2967 elf_m68k_gc_sweep_hook (bfd *abfd,
2968 struct bfd_link_info *info,
2969 asection *sec,
2970 const Elf_Internal_Rela *relocs)
2971 {
2972 Elf_Internal_Shdr *symtab_hdr;
2973 struct elf_link_hash_entry **sym_hashes;
2974 const Elf_Internal_Rela *rel, *relend;
2975 bfd *dynobj;
2976 struct elf_m68k_got *got;
2977
2978 if (info->relocatable)
2979 return TRUE;
2980
2981 dynobj = elf_hash_table (info)->dynobj;
2982 if (dynobj == NULL)
2983 return TRUE;
2984
2985 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2986 sym_hashes = elf_sym_hashes (abfd);
2987 got = NULL;
2988
2989 relend = relocs + sec->reloc_count;
2990 for (rel = relocs; rel < relend; rel++)
2991 {
2992 unsigned long r_symndx;
2993 struct elf_link_hash_entry *h = NULL;
2994
2995 r_symndx = ELF32_R_SYM (rel->r_info);
2996 if (r_symndx >= symtab_hdr->sh_info)
2997 {
2998 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2999 while (h->root.type == bfd_link_hash_indirect
3000 || h->root.type == bfd_link_hash_warning)
3001 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3002 }
3003
3004 switch (ELF32_R_TYPE (rel->r_info))
3005 {
3006 case R_68K_GOT8:
3007 case R_68K_GOT16:
3008 case R_68K_GOT32:
3009 if (h != NULL
3010 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3011 break;
3012
3013 /* FALLTHRU */
3014 case R_68K_GOT8O:
3015 case R_68K_GOT16O:
3016 case R_68K_GOT32O:
3017 /* Fall through. */
3018
3019 /* TLS relocations. */
3020 case R_68K_TLS_GD8:
3021 case R_68K_TLS_GD16:
3022 case R_68K_TLS_GD32:
3023 case R_68K_TLS_LDM8:
3024 case R_68K_TLS_LDM16:
3025 case R_68K_TLS_LDM32:
3026 case R_68K_TLS_IE8:
3027 case R_68K_TLS_IE16:
3028 case R_68K_TLS_IE32:
3029
3030 case R_68K_TLS_TPREL32:
3031 case R_68K_TLS_DTPREL32:
3032
3033 if (got == NULL)
3034 {
3035 got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3036 abfd, MUST_FIND, NULL)->got;
3037 BFD_ASSERT (got != NULL);
3038 }
3039
3040 {
3041 struct elf_m68k_got_entry_key key_;
3042 struct elf_m68k_got_entry **got_entry_ptr;
3043 struct elf_m68k_got_entry *got_entry;
3044
3045 elf_m68k_init_got_entry_key (&key_, h, abfd, r_symndx,
3046 ELF32_R_TYPE (rel->r_info));
3047 got_entry_ptr = elf_m68k_find_got_entry_ptr (got, &key_);
3048
3049 got_entry = *got_entry_ptr;
3050
3051 if (got_entry->u.s1.refcount > 0)
3052 {
3053 --got_entry->u.s1.refcount;
3054
3055 if (got_entry->u.s1.refcount == 0)
3056 /* We don't need the .got entry any more. */
3057 elf_m68k_remove_got_entry (got, got_entry_ptr);
3058 }
3059 }
3060 break;
3061
3062 case R_68K_PLT8:
3063 case R_68K_PLT16:
3064 case R_68K_PLT32:
3065 case R_68K_PLT8O:
3066 case R_68K_PLT16O:
3067 case R_68K_PLT32O:
3068 case R_68K_PC8:
3069 case R_68K_PC16:
3070 case R_68K_PC32:
3071 case R_68K_8:
3072 case R_68K_16:
3073 case R_68K_32:
3074 if (h != NULL)
3075 {
3076 if (h->plt.refcount > 0)
3077 --h->plt.refcount;
3078 }
3079 break;
3080
3081 default:
3082 break;
3083 }
3084 }
3085
3086 return TRUE;
3087 }
3088 \f
3089 /* Return the type of PLT associated with OUTPUT_BFD. */
3090
3091 static const struct elf_m68k_plt_info *
3092 elf_m68k_get_plt_info (bfd *output_bfd)
3093 {
3094 unsigned int features;
3095
3096 features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd));
3097 if (features & cpu32)
3098 return &elf_cpu32_plt_info;
3099 if (features & mcfisa_b)
3100 return &elf_isab_plt_info;
3101 if (features & mcfisa_c)
3102 return &elf_isac_plt_info;
3103 return &elf_m68k_plt_info;
3104 }
3105
3106 /* This function is called after all the input files have been read,
3107 and the input sections have been assigned to output sections.
3108 It's a convenient place to determine the PLT style. */
3109
3110 static bfd_boolean
3111 elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
3112 {
3113 /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got
3114 sections. */
3115 if (!elf_m68k_partition_multi_got (info))
3116 return FALSE;
3117
3118 elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd);
3119 return TRUE;
3120 }
3121
3122 /* Adjust a symbol defined by a dynamic object and referenced by a
3123 regular object. The current definition is in some section of the
3124 dynamic object, but we're not including those sections. We have to
3125 change the definition to something the rest of the link can
3126 understand. */
3127
3128 static bfd_boolean
3129 elf_m68k_adjust_dynamic_symbol (info, h)
3130 struct bfd_link_info *info;
3131 struct elf_link_hash_entry *h;
3132 {
3133 struct elf_m68k_link_hash_table *htab;
3134 bfd *dynobj;
3135 asection *s;
3136
3137 htab = elf_m68k_hash_table (info);
3138 dynobj = elf_hash_table (info)->dynobj;
3139
3140 /* Make sure we know what is going on here. */
3141 BFD_ASSERT (dynobj != NULL
3142 && (h->needs_plt
3143 || h->u.weakdef != NULL
3144 || (h->def_dynamic
3145 && h->ref_regular
3146 && !h->def_regular)));
3147
3148 /* If this is a function, put it in the procedure linkage table. We
3149 will fill in the contents of the procedure linkage table later,
3150 when we know the address of the .got section. */
3151 if (h->type == STT_FUNC
3152 || h->needs_plt)
3153 {
3154 if ((h->plt.refcount <= 0
3155 || SYMBOL_CALLS_LOCAL (info, h)
3156 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3157 && h->root.type == bfd_link_hash_undefweak))
3158 /* We must always create the plt entry if it was referenced
3159 by a PLTxxO relocation. In this case we already recorded
3160 it as a dynamic symbol. */
3161 && h->dynindx == -1)
3162 {
3163 /* This case can occur if we saw a PLTxx reloc in an input
3164 file, but the symbol was never referred to by a dynamic
3165 object, or if all references were garbage collected. In
3166 such a case, we don't actually need to build a procedure
3167 linkage table, and we can just do a PCxx reloc instead. */
3168 h->plt.offset = (bfd_vma) -1;
3169 h->needs_plt = 0;
3170 return TRUE;
3171 }
3172
3173 /* Make sure this symbol is output as a dynamic symbol. */
3174 if (h->dynindx == -1
3175 && !h->forced_local)
3176 {
3177 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3178 return FALSE;
3179 }
3180
3181 s = bfd_get_section_by_name (dynobj, ".plt");
3182 BFD_ASSERT (s != NULL);
3183
3184 /* If this is the first .plt entry, make room for the special
3185 first entry. */
3186 if (s->size == 0)
3187 s->size = htab->plt_info->size;
3188
3189 /* If this symbol is not defined in a regular file, and we are
3190 not generating a shared library, then set the symbol to this
3191 location in the .plt. This is required to make function
3192 pointers compare as equal between the normal executable and
3193 the shared library. */
3194 if (!info->shared
3195 && !h->def_regular)
3196 {
3197 h->root.u.def.section = s;
3198 h->root.u.def.value = s->size;
3199 }
3200
3201 h->plt.offset = s->size;
3202
3203 /* Make room for this entry. */
3204 s->size += htab->plt_info->size;
3205
3206 /* We also need to make an entry in the .got.plt section, which
3207 will be placed in the .got section by the linker script. */
3208 s = bfd_get_section_by_name (dynobj, ".got.plt");
3209 BFD_ASSERT (s != NULL);
3210 s->size += 4;
3211
3212 /* We also need to make an entry in the .rela.plt section. */
3213 s = bfd_get_section_by_name (dynobj, ".rela.plt");
3214 BFD_ASSERT (s != NULL);
3215 s->size += sizeof (Elf32_External_Rela);
3216
3217 return TRUE;
3218 }
3219
3220 /* Reinitialize the plt offset now that it is not used as a reference
3221 count any more. */
3222 h->plt.offset = (bfd_vma) -1;
3223
3224 /* If this is a weak symbol, and there is a real definition, the
3225 processor independent code will have arranged for us to see the
3226 real definition first, and we can just use the same value. */
3227 if (h->u.weakdef != NULL)
3228 {
3229 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3230 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3231 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3232 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3233 return TRUE;
3234 }
3235
3236 /* This is a reference to a symbol defined by a dynamic object which
3237 is not a function. */
3238
3239 /* If we are creating a shared library, we must presume that the
3240 only references to the symbol are via the global offset table.
3241 For such cases we need not do anything here; the relocations will
3242 be handled correctly by relocate_section. */
3243 if (info->shared)
3244 return TRUE;
3245
3246 /* If there are no references to this symbol that do not use the
3247 GOT, we don't need to generate a copy reloc. */
3248 if (!h->non_got_ref)
3249 return TRUE;
3250
3251 if (h->size == 0)
3252 {
3253 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3254 h->root.root.string);
3255 return TRUE;
3256 }
3257
3258 /* We must allocate the symbol in our .dynbss section, which will
3259 become part of the .bss section of the executable. There will be
3260 an entry for this symbol in the .dynsym section. The dynamic
3261 object will contain position independent code, so all references
3262 from the dynamic object to this symbol will go through the global
3263 offset table. The dynamic linker will use the .dynsym entry to
3264 determine the address it must put in the global offset table, so
3265 both the dynamic object and the regular object will refer to the
3266 same memory location for the variable. */
3267
3268 s = bfd_get_section_by_name (dynobj, ".dynbss");
3269 BFD_ASSERT (s != NULL);
3270
3271 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
3272 copy the initial value out of the dynamic object and into the
3273 runtime process image. We need to remember the offset into the
3274 .rela.bss section we are going to use. */
3275 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3276 {
3277 asection *srel;
3278
3279 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3280 BFD_ASSERT (srel != NULL);
3281 srel->size += sizeof (Elf32_External_Rela);
3282 h->needs_copy = 1;
3283 }
3284
3285 return _bfd_elf_adjust_dynamic_copy (h, s);
3286 }
3287
3288 /* Set the sizes of the dynamic sections. */
3289
3290 static bfd_boolean
3291 elf_m68k_size_dynamic_sections (output_bfd, info)
3292 bfd *output_bfd ATTRIBUTE_UNUSED;
3293 struct bfd_link_info *info;
3294 {
3295 bfd *dynobj;
3296 asection *s;
3297 bfd_boolean plt;
3298 bfd_boolean relocs;
3299
3300 dynobj = elf_hash_table (info)->dynobj;
3301 BFD_ASSERT (dynobj != NULL);
3302
3303 if (elf_hash_table (info)->dynamic_sections_created)
3304 {
3305 /* Set the contents of the .interp section to the interpreter. */
3306 if (info->executable)
3307 {
3308 s = bfd_get_section_by_name (dynobj, ".interp");
3309 BFD_ASSERT (s != NULL);
3310 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3311 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3312 }
3313 }
3314 else
3315 {
3316 /* We may have created entries in the .rela.got section.
3317 However, if we are not creating the dynamic sections, we will
3318 not actually use these entries. Reset the size of .rela.got,
3319 which will cause it to get stripped from the output file
3320 below. */
3321 s = bfd_get_section_by_name (dynobj, ".rela.got");
3322 if (s != NULL)
3323 s->size = 0;
3324 }
3325
3326 /* If this is a -Bsymbolic shared link, then we need to discard all
3327 PC relative relocs against symbols defined in a regular object.
3328 For the normal shared case we discard the PC relative relocs
3329 against symbols that have become local due to visibility changes.
3330 We allocated space for them in the check_relocs routine, but we
3331 will not fill them in in the relocate_section routine. */
3332 if (info->shared)
3333 elf_link_hash_traverse (elf_hash_table (info),
3334 elf_m68k_discard_copies,
3335 (PTR) info);
3336
3337 /* The check_relocs and adjust_dynamic_symbol entry points have
3338 determined the sizes of the various dynamic sections. Allocate
3339 memory for them. */
3340 plt = FALSE;
3341 relocs = FALSE;
3342 for (s = dynobj->sections; s != NULL; s = s->next)
3343 {
3344 const char *name;
3345
3346 if ((s->flags & SEC_LINKER_CREATED) == 0)
3347 continue;
3348
3349 /* It's OK to base decisions on the section name, because none
3350 of the dynobj section names depend upon the input files. */
3351 name = bfd_get_section_name (dynobj, s);
3352
3353 if (strcmp (name, ".plt") == 0)
3354 {
3355 /* Remember whether there is a PLT. */
3356 plt = s->size != 0;
3357 }
3358 else if (CONST_STRNEQ (name, ".rela"))
3359 {
3360 if (s->size != 0)
3361 {
3362 relocs = TRUE;
3363
3364 /* We use the reloc_count field as a counter if we need
3365 to copy relocs into the output file. */
3366 s->reloc_count = 0;
3367 }
3368 }
3369 else if (! CONST_STRNEQ (name, ".got")
3370 && strcmp (name, ".dynbss") != 0)
3371 {
3372 /* It's not one of our sections, so don't allocate space. */
3373 continue;
3374 }
3375
3376 if (s->size == 0)
3377 {
3378 /* If we don't need this section, strip it from the
3379 output file. This is mostly to handle .rela.bss and
3380 .rela.plt. We must create both sections in
3381 create_dynamic_sections, because they must be created
3382 before the linker maps input sections to output
3383 sections. The linker does that before
3384 adjust_dynamic_symbol is called, and it is that
3385 function which decides whether anything needs to go
3386 into these sections. */
3387 s->flags |= SEC_EXCLUDE;
3388 continue;
3389 }
3390
3391 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3392 continue;
3393
3394 /* Allocate memory for the section contents. */
3395 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3396 Unused entries should be reclaimed before the section's contents
3397 are written out, but at the moment this does not happen. Thus in
3398 order to prevent writing out garbage, we initialise the section's
3399 contents to zero. */
3400 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3401 if (s->contents == NULL)
3402 return FALSE;
3403 }
3404
3405 if (elf_hash_table (info)->dynamic_sections_created)
3406 {
3407 /* Add some entries to the .dynamic section. We fill in the
3408 values later, in elf_m68k_finish_dynamic_sections, but we
3409 must add the entries now so that we get the correct size for
3410 the .dynamic section. The DT_DEBUG entry is filled in by the
3411 dynamic linker and used by the debugger. */
3412 #define add_dynamic_entry(TAG, VAL) \
3413 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3414
3415 if (!info->shared)
3416 {
3417 if (!add_dynamic_entry (DT_DEBUG, 0))
3418 return FALSE;
3419 }
3420
3421 if (plt)
3422 {
3423 if (!add_dynamic_entry (DT_PLTGOT, 0)
3424 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3425 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3426 || !add_dynamic_entry (DT_JMPREL, 0))
3427 return FALSE;
3428 }
3429
3430 if (relocs)
3431 {
3432 if (!add_dynamic_entry (DT_RELA, 0)
3433 || !add_dynamic_entry (DT_RELASZ, 0)
3434 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3435 return FALSE;
3436 }
3437
3438 if ((info->flags & DF_TEXTREL) != 0)
3439 {
3440 if (!add_dynamic_entry (DT_TEXTREL, 0))
3441 return FALSE;
3442 }
3443 }
3444 #undef add_dynamic_entry
3445
3446 return TRUE;
3447 }
3448
3449 /* This function is called via elf_link_hash_traverse if we are
3450 creating a shared object. In the -Bsymbolic case it discards the
3451 space allocated to copy PC relative relocs against symbols which
3452 are defined in regular objects. For the normal shared case, it
3453 discards space for pc-relative relocs that have become local due to
3454 symbol visibility changes. We allocated space for them in the
3455 check_relocs routine, but we won't fill them in in the
3456 relocate_section routine.
3457
3458 We also check whether any of the remaining relocations apply
3459 against a readonly section, and set the DF_TEXTREL flag in this
3460 case. */
3461
3462 static bfd_boolean
3463 elf_m68k_discard_copies (h, inf)
3464 struct elf_link_hash_entry *h;
3465 PTR inf;
3466 {
3467 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3468 struct elf_m68k_pcrel_relocs_copied *s;
3469
3470 if (!SYMBOL_CALLS_LOCAL (info, h))
3471 {
3472 if ((info->flags & DF_TEXTREL) == 0)
3473 {
3474 /* Look for relocations against read-only sections. */
3475 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3476 s != NULL;
3477 s = s->next)
3478 if ((s->section->flags & SEC_READONLY) != 0)
3479 {
3480 info->flags |= DF_TEXTREL;
3481 break;
3482 }
3483 }
3484
3485 return TRUE;
3486 }
3487
3488 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3489 s != NULL;
3490 s = s->next)
3491 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3492
3493 return TRUE;
3494 }
3495
3496
3497 /* Install relocation RELA. */
3498
3499 static void
3500 elf_m68k_install_rela (bfd *output_bfd,
3501 asection *srela,
3502 Elf_Internal_Rela *rela)
3503 {
3504 bfd_byte *loc;
3505
3506 loc = srela->contents;
3507 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
3508 bfd_elf32_swap_reloca_out (output_bfd, rela, loc);
3509 }
3510
3511 /* Find the base offsets for thread-local storage in this object,
3512 for GD/LD and IE/LE respectively. */
3513
3514 #define DTP_OFFSET 0x8000
3515 #define TP_OFFSET 0x7000
3516
3517 static bfd_vma
3518 dtpoff_base (struct bfd_link_info *info)
3519 {
3520 /* If tls_sec is NULL, we should have signalled an error already. */
3521 if (elf_hash_table (info)->tls_sec == NULL)
3522 return 0;
3523 return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET;
3524 }
3525
3526 static bfd_vma
3527 tpoff_base (struct bfd_link_info *info)
3528 {
3529 /* If tls_sec is NULL, we should have signalled an error already. */
3530 if (elf_hash_table (info)->tls_sec == NULL)
3531 return 0;
3532 return elf_hash_table (info)->tls_sec->vma + TP_OFFSET;
3533 }
3534
3535 /* Output necessary relocation to handle a symbol during static link.
3536 This function is called from elf_m68k_relocate_section. */
3537
3538 static void
3539 elf_m68k_init_got_entry_static (struct bfd_link_info *info,
3540 bfd *output_bfd,
3541 enum elf_m68k_reloc_type r_type,
3542 asection *sgot,
3543 bfd_vma got_entry_offset,
3544 bfd_vma relocation)
3545 {
3546 switch (elf_m68k_reloc_got_type (r_type))
3547 {
3548 case R_68K_GOT32O:
3549 bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset);
3550 break;
3551
3552 case R_68K_TLS_GD32:
3553 /* We know the offset within the module,
3554 put it into the second GOT slot. */
3555 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3556 sgot->contents + got_entry_offset + 4);
3557 /* FALLTHRU */
3558
3559 case R_68K_TLS_LDM32:
3560 /* Mark it as belonging to module 1, the executable. */
3561 bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset);
3562 break;
3563
3564 case R_68K_TLS_IE32:
3565 bfd_put_32 (output_bfd, relocation - tpoff_base (info),
3566 sgot->contents + got_entry_offset);
3567 break;
3568
3569 default:
3570 BFD_ASSERT (FALSE);
3571 }
3572 }
3573
3574 /* Output necessary relocation to handle a local symbol
3575 during dynamic link.
3576 This function is called either from elf_m68k_relocate_section
3577 or from elf_m68k_finish_dynamic_symbol. */
3578
3579 static void
3580 elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info,
3581 bfd *output_bfd,
3582 enum elf_m68k_reloc_type r_type,
3583 asection *sgot,
3584 bfd_vma got_entry_offset,
3585 bfd_vma relocation,
3586 asection *srela)
3587 {
3588 Elf_Internal_Rela outrel;
3589
3590 switch (elf_m68k_reloc_got_type (r_type))
3591 {
3592 case R_68K_GOT32O:
3593 /* Emit RELATIVE relocation to initialize GOT slot
3594 at run-time. */
3595 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
3596 outrel.r_addend = relocation;
3597 break;
3598
3599 case R_68K_TLS_GD32:
3600 /* We know the offset within the module,
3601 put it into the second GOT slot. */
3602 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3603 sgot->contents + got_entry_offset + 4);
3604 /* FALLTHRU */
3605
3606 case R_68K_TLS_LDM32:
3607 /* We don't know the module number,
3608 create a relocation for it. */
3609 outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32);
3610 outrel.r_addend = 0;
3611 break;
3612
3613 case R_68K_TLS_IE32:
3614 /* Emit TPREL relocation to initialize GOT slot
3615 at run-time. */
3616 outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32);
3617 outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma;
3618 break;
3619
3620 default:
3621 BFD_ASSERT (FALSE);
3622 }
3623
3624 /* Offset of the GOT entry. */
3625 outrel.r_offset = (sgot->output_section->vma
3626 + sgot->output_offset
3627 + got_entry_offset);
3628
3629 /* Install one of the above relocations. */
3630 elf_m68k_install_rela (output_bfd, srela, &outrel);
3631
3632 bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset);
3633 }
3634
3635 /* Relocate an M68K ELF section. */
3636
3637 static bfd_boolean
3638 elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
3639 contents, relocs, local_syms, local_sections)
3640 bfd *output_bfd;
3641 struct bfd_link_info *info;
3642 bfd *input_bfd;
3643 asection *input_section;
3644 bfd_byte *contents;
3645 Elf_Internal_Rela *relocs;
3646 Elf_Internal_Sym *local_syms;
3647 asection **local_sections;
3648 {
3649 bfd *dynobj;
3650 Elf_Internal_Shdr *symtab_hdr;
3651 struct elf_link_hash_entry **sym_hashes;
3652 asection *sgot;
3653 asection *splt;
3654 asection *sreloc;
3655 asection *srela;
3656 struct elf_m68k_got *got;
3657 Elf_Internal_Rela *rel;
3658 Elf_Internal_Rela *relend;
3659
3660 dynobj = elf_hash_table (info)->dynobj;
3661 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3662 sym_hashes = elf_sym_hashes (input_bfd);
3663
3664 sgot = NULL;
3665 splt = NULL;
3666 sreloc = NULL;
3667 srela = NULL;
3668
3669 got = NULL;
3670
3671 rel = relocs;
3672 relend = relocs + input_section->reloc_count;
3673 for (; rel < relend; rel++)
3674 {
3675 int r_type;
3676 reloc_howto_type *howto;
3677 unsigned long r_symndx;
3678 struct elf_link_hash_entry *h;
3679 Elf_Internal_Sym *sym;
3680 asection *sec;
3681 bfd_vma relocation;
3682 bfd_boolean unresolved_reloc;
3683 bfd_reloc_status_type r;
3684
3685 r_type = ELF32_R_TYPE (rel->r_info);
3686 if (r_type < 0 || r_type >= (int) R_68K_max)
3687 {
3688 bfd_set_error (bfd_error_bad_value);
3689 return FALSE;
3690 }
3691 howto = howto_table + r_type;
3692
3693 r_symndx = ELF32_R_SYM (rel->r_info);
3694
3695 h = NULL;
3696 sym = NULL;
3697 sec = NULL;
3698 unresolved_reloc = FALSE;
3699
3700 if (r_symndx < symtab_hdr->sh_info)
3701 {
3702 sym = local_syms + r_symndx;
3703 sec = local_sections[r_symndx];
3704 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3705 }
3706 else
3707 {
3708 bfd_boolean warned;
3709
3710 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3711 r_symndx, symtab_hdr, sym_hashes,
3712 h, sec, relocation,
3713 unresolved_reloc, warned);
3714 }
3715
3716 if (sec != NULL && elf_discarded_section (sec))
3717 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3718 rel, relend, howto, contents);
3719
3720 if (info->relocatable)
3721 continue;
3722
3723 switch (r_type)
3724 {
3725 case R_68K_GOT8:
3726 case R_68K_GOT16:
3727 case R_68K_GOT32:
3728 /* Relocation is to the address of the entry for this symbol
3729 in the global offset table. */
3730 if (h != NULL
3731 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3732 {
3733 if (elf_m68k_hash_table (info)->local_gp_p)
3734 {
3735 bfd_vma sgot_output_offset;
3736 bfd_vma got_offset;
3737
3738 if (sgot == NULL)
3739 {
3740 sgot = bfd_get_section_by_name (dynobj, ".got");
3741
3742 if (sgot != NULL)
3743 sgot_output_offset = sgot->output_offset;
3744 else
3745 /* In this case we have a reference to
3746 _GLOBAL_OFFSET_TABLE_, but the GOT itself is
3747 empty.
3748 ??? Issue a warning? */
3749 sgot_output_offset = 0;
3750 }
3751 else
3752 sgot_output_offset = sgot->output_offset;
3753
3754 if (got == NULL)
3755 {
3756 struct elf_m68k_bfd2got_entry *bfd2got_entry;
3757
3758 bfd2got_entry
3759 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3760 input_bfd, SEARCH, NULL);
3761
3762 if (bfd2got_entry != NULL)
3763 {
3764 got = bfd2got_entry->got;
3765 BFD_ASSERT (got != NULL);
3766
3767 got_offset = got->offset;
3768 }
3769 else
3770 /* In this case we have a reference to
3771 _GLOBAL_OFFSET_TABLE_, but no other references
3772 accessing any GOT entries.
3773 ??? Issue a warning? */
3774 got_offset = 0;
3775 }
3776 else
3777 got_offset = got->offset;
3778
3779 /* Adjust GOT pointer to point to the GOT
3780 assigned to input_bfd. */
3781 rel->r_addend += sgot_output_offset + got_offset;
3782 }
3783 else
3784 BFD_ASSERT (got == NULL || got->offset == 0);
3785
3786 break;
3787 }
3788 /* Fall through. */
3789 case R_68K_GOT8O:
3790 case R_68K_GOT16O:
3791 case R_68K_GOT32O:
3792
3793 case R_68K_TLS_LDM32:
3794 case R_68K_TLS_LDM16:
3795 case R_68K_TLS_LDM8:
3796
3797 case R_68K_TLS_GD8:
3798 case R_68K_TLS_GD16:
3799 case R_68K_TLS_GD32:
3800
3801 case R_68K_TLS_IE8:
3802 case R_68K_TLS_IE16:
3803 case R_68K_TLS_IE32:
3804
3805 /* Relocation is the offset of the entry for this symbol in
3806 the global offset table. */
3807
3808 {
3809 struct elf_m68k_got_entry_key key_;
3810 bfd_vma *off_ptr;
3811 bfd_vma off;
3812
3813 if (sgot == NULL)
3814 {
3815 sgot = bfd_get_section_by_name (dynobj, ".got");
3816 BFD_ASSERT (sgot != NULL);
3817 }
3818
3819 if (got == NULL)
3820 {
3821 got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3822 input_bfd, MUST_FIND,
3823 NULL)->got;
3824 BFD_ASSERT (got != NULL);
3825 }
3826
3827 /* Get GOT offset for this symbol. */
3828 elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx,
3829 r_type);
3830 off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND,
3831 NULL)->u.s2.offset;
3832 off = *off_ptr;
3833
3834 /* The offset must always be a multiple of 4. We use
3835 the least significant bit to record whether we have
3836 already generated the necessary reloc. */
3837 if ((off & 1) != 0)
3838 off &= ~1;
3839 else
3840 {
3841 if (h != NULL
3842 /* @TLSLDM relocations are bounded to the module, in
3843 which the symbol is defined -- not to the symbol
3844 itself. */
3845 && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32)
3846 {
3847 bfd_boolean dyn;
3848
3849 dyn = elf_hash_table (info)->dynamic_sections_created;
3850 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3851 || (info->shared
3852 && SYMBOL_REFERENCES_LOCAL (info, h))
3853 || (ELF_ST_VISIBILITY (h->other)
3854 && h->root.type == bfd_link_hash_undefweak))
3855 {
3856 /* This is actually a static link, or it is a
3857 -Bsymbolic link and the symbol is defined
3858 locally, or the symbol was forced to be local
3859 because of a version file. We must initialize
3860 this entry in the global offset table. Since
3861 the offset must always be a multiple of 4, we
3862 use the least significant bit to record whether
3863 we have initialized it already.
3864
3865 When doing a dynamic link, we create a .rela.got
3866 relocation entry to initialize the value. This
3867 is done in the finish_dynamic_symbol routine. */
3868
3869 elf_m68k_init_got_entry_static (info,
3870 output_bfd,
3871 r_type,
3872 sgot,
3873 off,
3874 relocation);
3875
3876 *off_ptr |= 1;
3877 }
3878 else
3879 unresolved_reloc = FALSE;
3880 }
3881 else if (info->shared) /* && h == NULL */
3882 /* Process local symbol during dynamic link. */
3883 {
3884 if (srela == NULL)
3885 {
3886 srela = bfd_get_section_by_name (dynobj, ".rela.got");
3887 BFD_ASSERT (srela != NULL);
3888 }
3889
3890 elf_m68k_init_got_entry_local_shared (info,
3891 output_bfd,
3892 r_type,
3893 sgot,
3894 off,
3895 relocation,
3896 srela);
3897
3898 *off_ptr |= 1;
3899 }
3900 else /* h == NULL && !info->shared */
3901 {
3902 elf_m68k_init_got_entry_static (info,
3903 output_bfd,
3904 r_type,
3905 sgot,
3906 off,
3907 relocation);
3908
3909 *off_ptr |= 1;
3910 }
3911 }
3912
3913 /* We don't use elf_m68k_reloc_got_type in the condition below
3914 because this is the only place where difference between
3915 R_68K_GOTx and R_68K_GOTxO relocations matters. */
3916 if (r_type == R_68K_GOT32O
3917 || r_type == R_68K_GOT16O
3918 || r_type == R_68K_GOT8O
3919 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32
3920 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32
3921 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32)
3922 {
3923 /* GOT pointer is adjusted to point to the start/middle
3924 of local GOT. Adjust the offset accordingly. */
3925 BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p
3926 || off >= got->offset);
3927
3928 if (elf_m68k_hash_table (info)->local_gp_p)
3929 relocation = off - got->offset;
3930 else
3931 {
3932 BFD_ASSERT (got->offset == 0);
3933 relocation = sgot->output_offset + off;
3934 }
3935
3936 /* This relocation does not use the addend. */
3937 rel->r_addend = 0;
3938 }
3939 else
3940 relocation = (sgot->output_section->vma + sgot->output_offset
3941 + off);
3942 }
3943 break;
3944
3945 case R_68K_TLS_LDO32:
3946 case R_68K_TLS_LDO16:
3947 case R_68K_TLS_LDO8:
3948 relocation -= dtpoff_base (info);
3949 break;
3950
3951 case R_68K_TLS_LE32:
3952 case R_68K_TLS_LE16:
3953 case R_68K_TLS_LE8:
3954 if (info->shared)
3955 {
3956 (*_bfd_error_handler)
3957 (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted "
3958 "in shared object"),
3959 input_bfd, input_section, (long) rel->r_offset, howto->name);
3960
3961 return FALSE;
3962 }
3963 else
3964 relocation -= tpoff_base (info);
3965
3966 break;
3967
3968 case R_68K_PLT8:
3969 case R_68K_PLT16:
3970 case R_68K_PLT32:
3971 /* Relocation is to the entry for this symbol in the
3972 procedure linkage table. */
3973
3974 /* Resolve a PLTxx reloc against a local symbol directly,
3975 without using the procedure linkage table. */
3976 if (h == NULL)
3977 break;
3978
3979 if (h->plt.offset == (bfd_vma) -1
3980 || !elf_hash_table (info)->dynamic_sections_created)
3981 {
3982 /* We didn't make a PLT entry for this symbol. This
3983 happens when statically linking PIC code, or when
3984 using -Bsymbolic. */
3985 break;
3986 }
3987
3988 if (splt == NULL)
3989 {
3990 splt = bfd_get_section_by_name (dynobj, ".plt");
3991 BFD_ASSERT (splt != NULL);
3992 }
3993
3994 relocation = (splt->output_section->vma
3995 + splt->output_offset
3996 + h->plt.offset);
3997 unresolved_reloc = FALSE;
3998 break;
3999
4000 case R_68K_PLT8O:
4001 case R_68K_PLT16O:
4002 case R_68K_PLT32O:
4003 /* Relocation is the offset of the entry for this symbol in
4004 the procedure linkage table. */
4005 BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
4006
4007 if (splt == NULL)
4008 {
4009 splt = bfd_get_section_by_name (dynobj, ".plt");
4010 BFD_ASSERT (splt != NULL);
4011 }
4012
4013 relocation = h->plt.offset;
4014 unresolved_reloc = FALSE;
4015
4016 /* This relocation does not use the addend. */
4017 rel->r_addend = 0;
4018
4019 break;
4020
4021 case R_68K_8:
4022 case R_68K_16:
4023 case R_68K_32:
4024 case R_68K_PC8:
4025 case R_68K_PC16:
4026 case R_68K_PC32:
4027 if (info->shared
4028 && r_symndx != STN_UNDEF
4029 && (input_section->flags & SEC_ALLOC) != 0
4030 && (h == NULL
4031 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4032 || h->root.type != bfd_link_hash_undefweak)
4033 && ((r_type != R_68K_PC8
4034 && r_type != R_68K_PC16
4035 && r_type != R_68K_PC32)
4036 || !SYMBOL_CALLS_LOCAL (info, h)))
4037 {
4038 Elf_Internal_Rela outrel;
4039 bfd_byte *loc;
4040 bfd_boolean skip, relocate;
4041
4042 /* When generating a shared object, these relocations
4043 are copied into the output file to be resolved at run
4044 time. */
4045
4046 skip = FALSE;
4047 relocate = FALSE;
4048
4049 outrel.r_offset =
4050 _bfd_elf_section_offset (output_bfd, info, input_section,
4051 rel->r_offset);
4052 if (outrel.r_offset == (bfd_vma) -1)
4053 skip = TRUE;
4054 else if (outrel.r_offset == (bfd_vma) -2)
4055 skip = TRUE, relocate = TRUE;
4056 outrel.r_offset += (input_section->output_section->vma
4057 + input_section->output_offset);
4058
4059 if (skip)
4060 memset (&outrel, 0, sizeof outrel);
4061 else if (h != NULL
4062 && h->dynindx != -1
4063 && (r_type == R_68K_PC8
4064 || r_type == R_68K_PC16
4065 || r_type == R_68K_PC32
4066 || !info->shared
4067 || !info->symbolic
4068 || !h->def_regular))
4069 {
4070 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4071 outrel.r_addend = rel->r_addend;
4072 }
4073 else
4074 {
4075 /* This symbol is local, or marked to become local. */
4076 outrel.r_addend = relocation + rel->r_addend;
4077
4078 if (r_type == R_68K_32)
4079 {
4080 relocate = TRUE;
4081 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
4082 }
4083 else
4084 {
4085 long indx;
4086
4087 if (bfd_is_abs_section (sec))
4088 indx = 0;
4089 else if (sec == NULL || sec->owner == NULL)
4090 {
4091 bfd_set_error (bfd_error_bad_value);
4092 return FALSE;
4093 }
4094 else
4095 {
4096 asection *osec;
4097
4098 /* We are turning this relocation into one
4099 against a section symbol. It would be
4100 proper to subtract the symbol's value,
4101 osec->vma, from the emitted reloc addend,
4102 but ld.so expects buggy relocs. */
4103 osec = sec->output_section;
4104 indx = elf_section_data (osec)->dynindx;
4105 if (indx == 0)
4106 {
4107 struct elf_link_hash_table *htab;
4108 htab = elf_hash_table (info);
4109 osec = htab->text_index_section;
4110 indx = elf_section_data (osec)->dynindx;
4111 }
4112 BFD_ASSERT (indx != 0);
4113 }
4114
4115 outrel.r_info = ELF32_R_INFO (indx, r_type);
4116 }
4117 }
4118
4119 sreloc = elf_section_data (input_section)->sreloc;
4120 if (sreloc == NULL)
4121 abort ();
4122
4123 loc = sreloc->contents;
4124 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4125 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4126
4127 /* This reloc will be computed at runtime, so there's no
4128 need to do anything now, except for R_68K_32
4129 relocations that have been turned into
4130 R_68K_RELATIVE. */
4131 if (!relocate)
4132 continue;
4133 }
4134
4135 break;
4136
4137 case R_68K_GNU_VTINHERIT:
4138 case R_68K_GNU_VTENTRY:
4139 /* These are no-ops in the end. */
4140 continue;
4141
4142 default:
4143 break;
4144 }
4145
4146 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4147 because such sections are not SEC_ALLOC and thus ld.so will
4148 not process them. */
4149 if (unresolved_reloc
4150 && !((input_section->flags & SEC_DEBUGGING) != 0
4151 && h->def_dynamic))
4152 {
4153 (*_bfd_error_handler)
4154 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4155 input_bfd,
4156 input_section,
4157 (long) rel->r_offset,
4158 howto->name,
4159 h->root.root.string);
4160 return FALSE;
4161 }
4162
4163 if (r_symndx != STN_UNDEF
4164 && r_type != R_68K_NONE
4165 && (h == NULL
4166 || h->root.type == bfd_link_hash_defined
4167 || h->root.type == bfd_link_hash_defweak))
4168 {
4169 char sym_type;
4170
4171 sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type;
4172
4173 if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS))
4174 {
4175 const char *name;
4176
4177 if (h != NULL)
4178 name = h->root.root.string;
4179 else
4180 {
4181 name = (bfd_elf_string_from_elf_section
4182 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4183 if (name == NULL || *name == '\0')
4184 name = bfd_section_name (input_bfd, sec);
4185 }
4186
4187 (*_bfd_error_handler)
4188 ((sym_type == STT_TLS
4189 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4190 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4191 input_bfd,
4192 input_section,
4193 (long) rel->r_offset,
4194 howto->name,
4195 name);
4196 }
4197 }
4198
4199 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4200 contents, rel->r_offset,
4201 relocation, rel->r_addend);
4202
4203 if (r != bfd_reloc_ok)
4204 {
4205 const char *name;
4206
4207 if (h != NULL)
4208 name = h->root.root.string;
4209 else
4210 {
4211 name = bfd_elf_string_from_elf_section (input_bfd,
4212 symtab_hdr->sh_link,
4213 sym->st_name);
4214 if (name == NULL)
4215 return FALSE;
4216 if (*name == '\0')
4217 name = bfd_section_name (input_bfd, sec);
4218 }
4219
4220 if (r == bfd_reloc_overflow)
4221 {
4222 if (!(info->callbacks->reloc_overflow
4223 (info, (h ? &h->root : NULL), name, howto->name,
4224 (bfd_vma) 0, input_bfd, input_section,
4225 rel->r_offset)))
4226 return FALSE;
4227 }
4228 else
4229 {
4230 (*_bfd_error_handler)
4231 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4232 input_bfd, input_section,
4233 (long) rel->r_offset, name, (int) r);
4234 return FALSE;
4235 }
4236 }
4237 }
4238
4239 return TRUE;
4240 }
4241
4242 /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET
4243 into section SEC. */
4244
4245 static void
4246 elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value)
4247 {
4248 /* Make VALUE PC-relative. */
4249 value -= sec->output_section->vma + offset;
4250
4251 /* Apply any in-place addend. */
4252 value += bfd_get_32 (sec->owner, sec->contents + offset);
4253
4254 bfd_put_32 (sec->owner, value, sec->contents + offset);
4255 }
4256
4257 /* Finish up dynamic symbol handling. We set the contents of various
4258 dynamic sections here. */
4259
4260 static bfd_boolean
4261 elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
4262 bfd *output_bfd;
4263 struct bfd_link_info *info;
4264 struct elf_link_hash_entry *h;
4265 Elf_Internal_Sym *sym;
4266 {
4267 bfd *dynobj;
4268
4269 dynobj = elf_hash_table (info)->dynobj;
4270
4271 if (h->plt.offset != (bfd_vma) -1)
4272 {
4273 const struct elf_m68k_plt_info *plt_info;
4274 asection *splt;
4275 asection *sgot;
4276 asection *srela;
4277 bfd_vma plt_index;
4278 bfd_vma got_offset;
4279 Elf_Internal_Rela rela;
4280 bfd_byte *loc;
4281
4282 /* This symbol has an entry in the procedure linkage table. Set
4283 it up. */
4284
4285 BFD_ASSERT (h->dynindx != -1);
4286
4287 plt_info = elf_m68k_hash_table (info)->plt_info;
4288 splt = bfd_get_section_by_name (dynobj, ".plt");
4289 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4290 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
4291 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
4292
4293 /* Get the index in the procedure linkage table which
4294 corresponds to this symbol. This is the index of this symbol
4295 in all the symbols for which we are making plt entries. The
4296 first entry in the procedure linkage table is reserved. */
4297 plt_index = (h->plt.offset / plt_info->size) - 1;
4298
4299 /* Get the offset into the .got table of the entry that
4300 corresponds to this function. Each .got entry is 4 bytes.
4301 The first three are reserved. */
4302 got_offset = (plt_index + 3) * 4;
4303
4304 memcpy (splt->contents + h->plt.offset,
4305 plt_info->symbol_entry,
4306 plt_info->size);
4307
4308 elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got,
4309 (sgot->output_section->vma
4310 + sgot->output_offset
4311 + got_offset));
4312
4313 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4314 splt->contents
4315 + h->plt.offset
4316 + plt_info->symbol_resolve_entry + 2);
4317
4318 elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt,
4319 splt->output_section->vma);
4320
4321 /* Fill in the entry in the global offset table. */
4322 bfd_put_32 (output_bfd,
4323 (splt->output_section->vma
4324 + splt->output_offset
4325 + h->plt.offset
4326 + plt_info->symbol_resolve_entry),
4327 sgot->contents + got_offset);
4328
4329 /* Fill in the entry in the .rela.plt section. */
4330 rela.r_offset = (sgot->output_section->vma
4331 + sgot->output_offset
4332 + got_offset);
4333 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
4334 rela.r_addend = 0;
4335 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
4336 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4337
4338 if (!h->def_regular)
4339 {
4340 /* Mark the symbol as undefined, rather than as defined in
4341 the .plt section. Leave the value alone. */
4342 sym->st_shndx = SHN_UNDEF;
4343 }
4344 }
4345
4346 if (elf_m68k_hash_entry (h)->glist != NULL)
4347 {
4348 asection *sgot;
4349 asection *srela;
4350 struct elf_m68k_got_entry *got_entry;
4351
4352 /* This symbol has an entry in the global offset table. Set it
4353 up. */
4354
4355 sgot = bfd_get_section_by_name (dynobj, ".got");
4356 srela = bfd_get_section_by_name (dynobj, ".rela.got");
4357 BFD_ASSERT (sgot != NULL && srela != NULL);
4358
4359 got_entry = elf_m68k_hash_entry (h)->glist;
4360
4361 while (got_entry != NULL)
4362 {
4363 enum elf_m68k_reloc_type r_type;
4364 bfd_vma got_entry_offset;
4365
4366 r_type = got_entry->key_.type;
4367 got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1;
4368
4369 /* If this is a -Bsymbolic link, and the symbol is defined
4370 locally, we just want to emit a RELATIVE reloc. Likewise if
4371 the symbol was forced to be local because of a version file.
4372 The entry in the global offset table already have been
4373 initialized in the relocate_section function. */
4374 if (info->shared
4375 && SYMBOL_REFERENCES_LOCAL (info, h))
4376 {
4377 bfd_vma relocation;
4378
4379 relocation = bfd_get_signed_32 (output_bfd,
4380 (sgot->contents
4381 + got_entry_offset));
4382
4383 /* Undo TP bias. */
4384 switch (elf_m68k_reloc_got_type (r_type))
4385 {
4386 case R_68K_GOT32O:
4387 case R_68K_TLS_LDM32:
4388 break;
4389
4390 case R_68K_TLS_GD32:
4391 /* The value for this relocation is actually put in
4392 the second GOT slot. */
4393 relocation = bfd_get_signed_32 (output_bfd,
4394 (sgot->contents
4395 + got_entry_offset + 4));
4396 relocation += dtpoff_base (info);
4397 break;
4398
4399 case R_68K_TLS_IE32:
4400 relocation += tpoff_base (info);
4401 break;
4402
4403 default:
4404 BFD_ASSERT (FALSE);
4405 }
4406
4407 elf_m68k_init_got_entry_local_shared (info,
4408 output_bfd,
4409 r_type,
4410 sgot,
4411 got_entry_offset,
4412 relocation,
4413 srela);
4414 }
4415 else
4416 {
4417 Elf_Internal_Rela rela;
4418
4419 /* Put zeros to GOT slots that will be initialized
4420 at run-time. */
4421 {
4422 bfd_vma n_slots;
4423
4424 n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type);
4425 while (n_slots--)
4426 bfd_put_32 (output_bfd, (bfd_vma) 0,
4427 (sgot->contents + got_entry_offset
4428 + 4 * n_slots));
4429 }
4430
4431 rela.r_addend = 0;
4432 rela.r_offset = (sgot->output_section->vma
4433 + sgot->output_offset
4434 + got_entry_offset);
4435
4436 switch (elf_m68k_reloc_got_type (r_type))
4437 {
4438 case R_68K_GOT32O:
4439 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
4440 elf_m68k_install_rela (output_bfd, srela, &rela);
4441 break;
4442
4443 case R_68K_TLS_GD32:
4444 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32);
4445 elf_m68k_install_rela (output_bfd, srela, &rela);
4446
4447 rela.r_offset += 4;
4448 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32);
4449 elf_m68k_install_rela (output_bfd, srela, &rela);
4450 break;
4451
4452 case R_68K_TLS_IE32:
4453 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32);
4454 elf_m68k_install_rela (output_bfd, srela, &rela);
4455 break;
4456
4457 default:
4458 BFD_ASSERT (FALSE);
4459 break;
4460 }
4461 }
4462
4463 got_entry = got_entry->u.s2.next;
4464 }
4465 }
4466
4467 if (h->needs_copy)
4468 {
4469 asection *s;
4470 Elf_Internal_Rela rela;
4471 bfd_byte *loc;
4472
4473 /* This symbol needs a copy reloc. Set it up. */
4474
4475 BFD_ASSERT (h->dynindx != -1
4476 && (h->root.type == bfd_link_hash_defined
4477 || h->root.type == bfd_link_hash_defweak));
4478
4479 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4480 ".rela.bss");
4481 BFD_ASSERT (s != NULL);
4482
4483 rela.r_offset = (h->root.u.def.value
4484 + h->root.u.def.section->output_section->vma
4485 + h->root.u.def.section->output_offset);
4486 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
4487 rela.r_addend = 0;
4488 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4489 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4490 }
4491
4492 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4493 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4494 || h == elf_hash_table (info)->hgot)
4495 sym->st_shndx = SHN_ABS;
4496
4497 return TRUE;
4498 }
4499
4500 /* Finish up the dynamic sections. */
4501
4502 static bfd_boolean
4503 elf_m68k_finish_dynamic_sections (output_bfd, info)
4504 bfd *output_bfd;
4505 struct bfd_link_info *info;
4506 {
4507 bfd *dynobj;
4508 asection *sgot;
4509 asection *sdyn;
4510
4511 dynobj = elf_hash_table (info)->dynobj;
4512
4513 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4514 BFD_ASSERT (sgot != NULL);
4515 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4516
4517 if (elf_hash_table (info)->dynamic_sections_created)
4518 {
4519 asection *splt;
4520 Elf32_External_Dyn *dyncon, *dynconend;
4521
4522 splt = bfd_get_section_by_name (dynobj, ".plt");
4523 BFD_ASSERT (splt != NULL && sdyn != NULL);
4524
4525 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4526 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4527 for (; dyncon < dynconend; dyncon++)
4528 {
4529 Elf_Internal_Dyn dyn;
4530 const char *name;
4531 asection *s;
4532
4533 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4534
4535 switch (dyn.d_tag)
4536 {
4537 default:
4538 break;
4539
4540 case DT_PLTGOT:
4541 name = ".got";
4542 goto get_vma;
4543 case DT_JMPREL:
4544 name = ".rela.plt";
4545 get_vma:
4546 s = bfd_get_section_by_name (output_bfd, name);
4547 BFD_ASSERT (s != NULL);
4548 dyn.d_un.d_ptr = s->vma;
4549 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4550 break;
4551
4552 case DT_PLTRELSZ:
4553 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4554 BFD_ASSERT (s != NULL);
4555 dyn.d_un.d_val = s->size;
4556 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4557 break;
4558
4559 case DT_RELASZ:
4560 /* The procedure linkage table relocs (DT_JMPREL) should
4561 not be included in the overall relocs (DT_RELA).
4562 Therefore, we override the DT_RELASZ entry here to
4563 make it not include the JMPREL relocs. Since the
4564 linker script arranges for .rela.plt to follow all
4565 other relocation sections, we don't have to worry
4566 about changing the DT_RELA entry. */
4567 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4568 if (s != NULL)
4569 dyn.d_un.d_val -= s->size;
4570 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4571 break;
4572 }
4573 }
4574
4575 /* Fill in the first entry in the procedure linkage table. */
4576 if (splt->size > 0)
4577 {
4578 const struct elf_m68k_plt_info *plt_info;
4579
4580 plt_info = elf_m68k_hash_table (info)->plt_info;
4581 memcpy (splt->contents, plt_info->plt0_entry, plt_info->size);
4582
4583 elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4,
4584 (sgot->output_section->vma
4585 + sgot->output_offset
4586 + 4));
4587
4588 elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8,
4589 (sgot->output_section->vma
4590 + sgot->output_offset
4591 + 8));
4592
4593 elf_section_data (splt->output_section)->this_hdr.sh_entsize
4594 = plt_info->size;
4595 }
4596 }
4597
4598 /* Fill in the first three entries in the global offset table. */
4599 if (sgot->size > 0)
4600 {
4601 if (sdyn == NULL)
4602 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4603 else
4604 bfd_put_32 (output_bfd,
4605 sdyn->output_section->vma + sdyn->output_offset,
4606 sgot->contents);
4607 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4608 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4609 }
4610
4611 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4612
4613 return TRUE;
4614 }
4615
4616 /* Given a .data section and a .emreloc in-memory section, store
4617 relocation information into the .emreloc section which can be
4618 used at runtime to relocate the section. This is called by the
4619 linker when the --embedded-relocs switch is used. This is called
4620 after the add_symbols entry point has been called for all the
4621 objects, and before the final_link entry point is called. */
4622
4623 bfd_boolean
4624 bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg)
4625 bfd *abfd;
4626 struct bfd_link_info *info;
4627 asection *datasec;
4628 asection *relsec;
4629 char **errmsg;
4630 {
4631 Elf_Internal_Shdr *symtab_hdr;
4632 Elf_Internal_Sym *isymbuf = NULL;
4633 Elf_Internal_Rela *internal_relocs = NULL;
4634 Elf_Internal_Rela *irel, *irelend;
4635 bfd_byte *p;
4636 bfd_size_type amt;
4637
4638 BFD_ASSERT (! info->relocatable);
4639
4640 *errmsg = NULL;
4641
4642 if (datasec->reloc_count == 0)
4643 return TRUE;
4644
4645 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4646
4647 /* Get a copy of the native relocations. */
4648 internal_relocs = (_bfd_elf_link_read_relocs
4649 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
4650 info->keep_memory));
4651 if (internal_relocs == NULL)
4652 goto error_return;
4653
4654 amt = (bfd_size_type) datasec->reloc_count * 12;
4655 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
4656 if (relsec->contents == NULL)
4657 goto error_return;
4658
4659 p = relsec->contents;
4660
4661 irelend = internal_relocs + datasec->reloc_count;
4662 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
4663 {
4664 asection *targetsec;
4665
4666 /* We are going to write a four byte longword into the runtime
4667 reloc section. The longword will be the address in the data
4668 section which must be relocated. It is followed by the name
4669 of the target section NUL-padded or truncated to 8
4670 characters. */
4671
4672 /* We can only relocate absolute longword relocs at run time. */
4673 if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32)
4674 {
4675 *errmsg = _("unsupported reloc type");
4676 bfd_set_error (bfd_error_bad_value);
4677 goto error_return;
4678 }
4679
4680 /* Get the target section referred to by the reloc. */
4681 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4682 {
4683 /* A local symbol. */
4684 Elf_Internal_Sym *isym;
4685
4686 /* Read this BFD's local symbols if we haven't done so already. */
4687 if (isymbuf == NULL)
4688 {
4689 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4690 if (isymbuf == NULL)
4691 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4692 symtab_hdr->sh_info, 0,
4693 NULL, NULL, NULL);
4694 if (isymbuf == NULL)
4695 goto error_return;
4696 }
4697
4698 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4699 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4700 }
4701 else
4702 {
4703 unsigned long indx;
4704 struct elf_link_hash_entry *h;
4705
4706 /* An external symbol. */
4707 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4708 h = elf_sym_hashes (abfd)[indx];
4709 BFD_ASSERT (h != NULL);
4710 if (h->root.type == bfd_link_hash_defined
4711 || h->root.type == bfd_link_hash_defweak)
4712 targetsec = h->root.u.def.section;
4713 else
4714 targetsec = NULL;
4715 }
4716
4717 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
4718 memset (p + 4, 0, 8);
4719 if (targetsec != NULL)
4720 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
4721 }
4722
4723 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4724 free (isymbuf);
4725 if (internal_relocs != NULL
4726 && elf_section_data (datasec)->relocs != internal_relocs)
4727 free (internal_relocs);
4728 return TRUE;
4729
4730 error_return:
4731 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4732 free (isymbuf);
4733 if (internal_relocs != NULL
4734 && elf_section_data (datasec)->relocs != internal_relocs)
4735 free (internal_relocs);
4736 return FALSE;
4737 }
4738
4739 /* Set target options. */
4740
4741 void
4742 bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling)
4743 {
4744 struct elf_m68k_link_hash_table *htab;
4745 bfd_boolean use_neg_got_offsets_p;
4746 bfd_boolean allow_multigot_p;
4747 bfd_boolean local_gp_p;
4748
4749 switch (got_handling)
4750 {
4751 case 0:
4752 /* --got=single. */
4753 local_gp_p = FALSE;
4754 use_neg_got_offsets_p = FALSE;
4755 allow_multigot_p = FALSE;
4756 break;
4757
4758 case 1:
4759 /* --got=negative. */
4760 local_gp_p = TRUE;
4761 use_neg_got_offsets_p = TRUE;
4762 allow_multigot_p = FALSE;
4763 break;
4764
4765 case 2:
4766 /* --got=multigot. */
4767 local_gp_p = TRUE;
4768 use_neg_got_offsets_p = TRUE;
4769 allow_multigot_p = TRUE;
4770 break;
4771
4772 default:
4773 BFD_ASSERT (FALSE);
4774 return;
4775 }
4776
4777 htab = elf_m68k_hash_table (info);
4778 if (htab != NULL)
4779 {
4780 htab->local_gp_p = local_gp_p;
4781 htab->use_neg_got_offsets_p = use_neg_got_offsets_p;
4782 htab->allow_multigot_p = allow_multigot_p;
4783 }
4784 }
4785
4786 static enum elf_reloc_type_class
4787 elf32_m68k_reloc_type_class (rela)
4788 const Elf_Internal_Rela *rela;
4789 {
4790 switch ((int) ELF32_R_TYPE (rela->r_info))
4791 {
4792 case R_68K_RELATIVE:
4793 return reloc_class_relative;
4794 case R_68K_JMP_SLOT:
4795 return reloc_class_plt;
4796 case R_68K_COPY:
4797 return reloc_class_copy;
4798 default:
4799 return reloc_class_normal;
4800 }
4801 }
4802
4803 /* Return address for Ith PLT stub in section PLT, for relocation REL
4804 or (bfd_vma) -1 if it should not be included. */
4805
4806 static bfd_vma
4807 elf_m68k_plt_sym_val (bfd_vma i, const asection *plt,
4808 const arelent *rel ATTRIBUTE_UNUSED)
4809 {
4810 return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size;
4811 }
4812
4813 #define TARGET_BIG_SYM bfd_elf32_m68k_vec
4814 #define TARGET_BIG_NAME "elf32-m68k"
4815 #define ELF_MACHINE_CODE EM_68K
4816 #define ELF_MAXPAGESIZE 0x2000
4817 #define elf_backend_create_dynamic_sections \
4818 _bfd_elf_create_dynamic_sections
4819 #define bfd_elf32_bfd_link_hash_table_create \
4820 elf_m68k_link_hash_table_create
4821 /* ??? Should it be this macro or bfd_elfNN_bfd_link_hash_table_create? */
4822 #define bfd_elf32_bfd_link_hash_table_free \
4823 elf_m68k_link_hash_table_free
4824 #define bfd_elf32_bfd_final_link bfd_elf_final_link
4825
4826 #define elf_backend_check_relocs elf_m68k_check_relocs
4827 #define elf_backend_always_size_sections \
4828 elf_m68k_always_size_sections
4829 #define elf_backend_adjust_dynamic_symbol \
4830 elf_m68k_adjust_dynamic_symbol
4831 #define elf_backend_size_dynamic_sections \
4832 elf_m68k_size_dynamic_sections
4833 #define elf_backend_final_write_processing elf_m68k_final_write_processing
4834 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4835 #define elf_backend_relocate_section elf_m68k_relocate_section
4836 #define elf_backend_finish_dynamic_symbol \
4837 elf_m68k_finish_dynamic_symbol
4838 #define elf_backend_finish_dynamic_sections \
4839 elf_m68k_finish_dynamic_sections
4840 #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
4841 #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook
4842 #define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol
4843 #define bfd_elf32_bfd_merge_private_bfd_data \
4844 elf32_m68k_merge_private_bfd_data
4845 #define bfd_elf32_bfd_set_private_flags \
4846 elf32_m68k_set_private_flags
4847 #define bfd_elf32_bfd_print_private_bfd_data \
4848 elf32_m68k_print_private_bfd_data
4849 #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class
4850 #define elf_backend_plt_sym_val elf_m68k_plt_sym_val
4851 #define elf_backend_object_p elf32_m68k_object_p
4852
4853 #define elf_backend_can_gc_sections 1
4854 #define elf_backend_can_refcount 1
4855 #define elf_backend_want_got_plt 1
4856 #define elf_backend_plt_readonly 1
4857 #define elf_backend_want_plt_sym 0
4858 #define elf_backend_got_header_size 12
4859 #define elf_backend_rela_normal 1
4860
4861 #include "elf32-target.h"
GDB Binutils - Deliverables
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