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[deliverable/binutils-gdb.git] / bfd / elf32-m68k.c
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252b5132 1/* Motorola 68k series support for 32-bit ELF
b90efa5b 2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
252b5132 3
ae9a127f 4 This file is part of BFD, the Binary File Descriptor library.
252b5132 5
ae9a127f
NC		 6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
cd123cb7 8 the Free Software Foundation; either version 3 of the License, or
ae9a127f 9 (at your option) any later version.
252b5132 10
ae9a127f
NC		 11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
252b5132 15
ae9a127f
NC		 16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
cd123cb7
NC		 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
252b5132 20
252b5132 21#include "sysdep.h"
3db64b00 22#include "bfd.h"
252b5132
RH		 23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26#include "elf/m68k.h"
266abb8f 27#include "opcode/m68k.h"
252b5132 28
2c3fc389
NC		 29static bfd_boolean
30elf_m68k_discard_copies (struct elf_link_hash_entry *, void *);
31
32static reloc_howto_type howto_table[] =
33{
6346d5ca 34 HOWTO(R_68K_NONE, 0, 3, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE),
b34976b6
AM		 35 HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE),
36 HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE),
37 HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE),
38 HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE),
39 HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE),
40 HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE),
41 HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE),
42 HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE),
43 HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE),
44 HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE),
45 HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE),
46 HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE),
47 HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE),
48 HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE),
49 HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE),
50 HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE),
51 HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE),
52 HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE),
53 HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE),
54 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),
55 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),
56 HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE),
ae9a127f 57 /* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 58 HOWTO (R_68K_GNU_VTINHERIT, /* type */
59 0, /* rightshift */
60 2, /* size (0 = byte, 1 = short, 2 = long) */
61 0, /* bitsize */
b34976b6 62 FALSE, /* pc_relative */
252b5132
RH		 63 0, /* bitpos */
64 complain_overflow_dont, /* complain_on_overflow */
65 NULL, /* special_function */
66 "R_68K_GNU_VTINHERIT", /* name */
b34976b6 67 FALSE, /* partial_inplace */
252b5132
RH		 68 0, /* src_mask */
69 0, /* dst_mask */
b34976b6 70 FALSE),
ae9a127f 71 /* GNU extension to record C++ vtable member usage. */
252b5132
RH		 72 HOWTO (R_68K_GNU_VTENTRY, /* type */
73 0, /* rightshift */
74 2, /* size (0 = byte, 1 = short, 2 = long) */
75 0, /* bitsize */
b34976b6 76 FALSE, /* pc_relative */
252b5132
RH		 77 0, /* bitpos */
78 complain_overflow_dont, /* complain_on_overflow */
79 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
80 "R_68K_GNU_VTENTRY", /* name */
b34976b6 81 FALSE, /* partial_inplace */
252b5132
RH		 82 0, /* src_mask */
83 0, /* dst_mask */
b34976b6 84 FALSE),
cf869cce
NC		 85
86 /* TLS general dynamic variable reference. */
87 HOWTO (R_68K_TLS_GD32, /* type */
88 0, /* rightshift */
89 2, /* size (0 = byte, 1 = short, 2 = long) */
90 32, /* bitsize */
91 FALSE, /* pc_relative */
92 0, /* bitpos */
93 complain_overflow_bitfield, /* complain_on_overflow */
94 bfd_elf_generic_reloc, /* special_function */
95 "R_68K_TLS_GD32", /* name */
96 FALSE, /* partial_inplace */
97 0, /* src_mask */
98 0xffffffff, /* dst_mask */
99 FALSE), /* pcrel_offset */
100
101 HOWTO (R_68K_TLS_GD16, /* type */
102 0, /* rightshift */
103 1, /* size (0 = byte, 1 = short, 2 = long) */
104 16, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_signed, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_68K_TLS_GD16", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0x0000ffff, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO (R_68K_TLS_GD8, /* type */
116 0, /* rightshift */
117 0, /* size (0 = byte, 1 = short, 2 = long) */
118 8, /* bitsize */
119 FALSE, /* pc_relative */
120 0, /* bitpos */
121 complain_overflow_signed, /* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_68K_TLS_GD8", /* name */
124 FALSE, /* partial_inplace */
125 0, /* src_mask */
126 0x000000ff, /* dst_mask */
127 FALSE), /* pcrel_offset */
128
129 /* TLS local dynamic variable reference. */
130 HOWTO (R_68K_TLS_LDM32, /* type */
131 0, /* rightshift */
132 2, /* size (0 = byte, 1 = short, 2 = long) */
133 32, /* bitsize */
134 FALSE, /* pc_relative */
135 0, /* bitpos */
136 complain_overflow_bitfield, /* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_68K_TLS_LDM32", /* name */
139 FALSE, /* partial_inplace */
140 0, /* src_mask */
141 0xffffffff, /* dst_mask */
142 FALSE), /* pcrel_offset */
143
144 HOWTO (R_68K_TLS_LDM16, /* type */
145 0, /* rightshift */
146 1, /* size (0 = byte, 1 = short, 2 = long) */
147 16, /* bitsize */
148 FALSE, /* pc_relative */
149 0, /* bitpos */
150 complain_overflow_signed, /* complain_on_overflow */
151 bfd_elf_generic_reloc, /* special_function */
152 "R_68K_TLS_LDM16", /* name */
153 FALSE, /* partial_inplace */
154 0, /* src_mask */
155 0x0000ffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
157
158 HOWTO (R_68K_TLS_LDM8, /* type */
159 0, /* rightshift */
160 0, /* size (0 = byte, 1 = short, 2 = long) */
161 8, /* bitsize */
162 FALSE, /* pc_relative */
163 0, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_68K_TLS_LDM8", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x000000ff, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 HOWTO (R_68K_TLS_LDO32, /* type */
173 0, /* rightshift */
174 2, /* size (0 = byte, 1 = short, 2 = long) */
175 32, /* bitsize */
176 FALSE, /* pc_relative */
177 0, /* bitpos */
178 complain_overflow_bitfield, /* complain_on_overflow */
179 bfd_elf_generic_reloc, /* special_function */
180 "R_68K_TLS_LDO32", /* name */
181 FALSE, /* partial_inplace */
182 0, /* src_mask */
183 0xffffffff, /* dst_mask */
184 FALSE), /* pcrel_offset */
185
186 HOWTO (R_68K_TLS_LDO16, /* type */
187 0, /* rightshift */
188 1, /* size (0 = byte, 1 = short, 2 = long) */
189 16, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_signed, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_68K_TLS_LDO16", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0x0000ffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 HOWTO (R_68K_TLS_LDO8, /* type */
201 0, /* rightshift */
202 0, /* size (0 = byte, 1 = short, 2 = long) */
203 8, /* bitsize */
204 FALSE, /* pc_relative */
205 0, /* bitpos */
206 complain_overflow_signed, /* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_68K_TLS_LDO8", /* name */
209 FALSE, /* partial_inplace */
210 0, /* src_mask */
211 0x000000ff, /* dst_mask */
212 FALSE), /* pcrel_offset */
213
214 /* TLS initial execution variable reference. */
215 HOWTO (R_68K_TLS_IE32, /* type */
216 0, /* rightshift */
217 2, /* size (0 = byte, 1 = short, 2 = long) */
218 32, /* bitsize */
219 FALSE, /* pc_relative */
220 0, /* bitpos */
221 complain_overflow_bitfield, /* complain_on_overflow */
222 bfd_elf_generic_reloc, /* special_function */
223 "R_68K_TLS_IE32", /* name */
224 FALSE, /* partial_inplace */
225 0, /* src_mask */
226 0xffffffff, /* dst_mask */
227 FALSE), /* pcrel_offset */
228
229 HOWTO (R_68K_TLS_IE16, /* type */
230 0, /* rightshift */
231 1, /* size (0 = byte, 1 = short, 2 = long) */
232 16, /* bitsize */
233 FALSE, /* pc_relative */
234 0, /* bitpos */
235 complain_overflow_signed, /* complain_on_overflow */
236 bfd_elf_generic_reloc, /* special_function */
237 "R_68K_TLS_IE16", /* name */
238 FALSE, /* partial_inplace */
239 0, /* src_mask */
240 0x0000ffff, /* dst_mask */
241 FALSE), /* pcrel_offset */
242
243 HOWTO (R_68K_TLS_IE8, /* type */
244 0, /* rightshift */
245 0, /* size (0 = byte, 1 = short, 2 = long) */
246 8, /* bitsize */
247 FALSE, /* pc_relative */
248 0, /* bitpos */
249 complain_overflow_signed, /* complain_on_overflow */
250 bfd_elf_generic_reloc, /* special_function */
251 "R_68K_TLS_IE8", /* name */
252 FALSE, /* partial_inplace */
253 0, /* src_mask */
254 0x000000ff, /* dst_mask */
255 FALSE), /* pcrel_offset */
256
257 /* TLS local execution variable reference. */
258 HOWTO (R_68K_TLS_LE32, /* type */
259 0, /* rightshift */
260 2, /* size (0 = byte, 1 = short, 2 = long) */
261 32, /* bitsize */
262 FALSE, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_bitfield, /* complain_on_overflow */
265 bfd_elf_generic_reloc, /* special_function */
266 "R_68K_TLS_LE32", /* name */
267 FALSE, /* partial_inplace */
268 0, /* src_mask */
269 0xffffffff, /* dst_mask */
270 FALSE), /* pcrel_offset */
271
272 HOWTO (R_68K_TLS_LE16, /* type */
273 0, /* rightshift */
274 1, /* size (0 = byte, 1 = short, 2 = long) */
275 16, /* bitsize */
276 FALSE, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_signed, /* complain_on_overflow */
279 bfd_elf_generic_reloc, /* special_function */
280 "R_68K_TLS_LE16", /* name */
281 FALSE, /* partial_inplace */
282 0, /* src_mask */
283 0x0000ffff, /* dst_mask */
284 FALSE), /* pcrel_offset */
285
286 HOWTO (R_68K_TLS_LE8, /* type */
287 0, /* rightshift */
288 0, /* size (0 = byte, 1 = short, 2 = long) */
289 8, /* bitsize */
290 FALSE, /* pc_relative */
291 0, /* bitpos */
292 complain_overflow_signed, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_68K_TLS_LE8", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0x000000ff, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* TLS GD/LD dynamic relocations. */
301 HOWTO (R_68K_TLS_DTPMOD32, /* type */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 32, /* bitsize */
305 FALSE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_68K_TLS_DTPMOD32", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0xffffffff, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 HOWTO (R_68K_TLS_DTPREL32, /* type */
316 0, /* rightshift */
317 2, /* size (0 = byte, 1 = short, 2 = long) */
318 32, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_dont, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_68K_TLS_DTPREL32", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xffffffff, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 HOWTO (R_68K_TLS_TPREL32, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 32, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_dont, /* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_68K_TLS_TPREL32", /* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0xffffffff, /* dst_mask */
341 FALSE), /* pcrel_offset */
252b5132
RH		 342};
343
344static void
c86ad514 345rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
252b5132 346{
c86ad514
AS		 347 unsigned int indx = ELF32_R_TYPE (dst->r_info);
348
349 if (indx >= (unsigned int) R_68K_max)
350 {
351 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
352 abfd, (int) indx);
353 indx = R_68K_NONE;
354 }
355 cache_ptr->howto = &howto_table[indx];
252b5132
RH		 356}
357
358#define elf_info_to_howto rtype_to_howto
359
360static const struct
361{
362 bfd_reloc_code_real_type bfd_val;
363 int elf_val;
cf869cce
NC		 364}
365 reloc_map[] =
366{
252b5132
RH		 367 { BFD_RELOC_NONE, R_68K_NONE },
368 { BFD_RELOC_32, R_68K_32 },
369 { BFD_RELOC_16, R_68K_16 },
370 { BFD_RELOC_8, R_68K_8 },
371 { BFD_RELOC_32_PCREL, R_68K_PC32 },
372 { BFD_RELOC_16_PCREL, R_68K_PC16 },
373 { BFD_RELOC_8_PCREL, R_68K_PC8 },
374 { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
375 { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
376 { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
377 { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
378 { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
379 { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
380 { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
381 { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
382 { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
383 { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
384 { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
385 { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
386 { BFD_RELOC_NONE, R_68K_COPY },
387 { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
388 { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
389 { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
390 { BFD_RELOC_CTOR, R_68K_32 },
391 { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
392 { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
cf869cce
NC		 393 { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 },
394 { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 },
395 { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 },
396 { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 },
397 { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 },
398 { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 },
399 { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 },
400 { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 },
401 { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 },
402 { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 },
403 { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 },
404 { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 },
405 { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 },
406 { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 },
407 { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 },
252b5132
RH		 408};
409
410static reloc_howto_type *
2c3fc389
NC		 411reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
412 bfd_reloc_code_real_type code)
252b5132
RH		 413{
414 unsigned int i;
415 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
416 {
417 if (reloc_map[i].bfd_val == code)
418 return &howto_table[reloc_map[i].elf_val];
419 }
420 return 0;
421}
422
157090f7
AM		 423static reloc_howto_type *
424reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
425{
426 unsigned int i;
427
428 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
429 if (howto_table[i].name != NULL
430 && strcasecmp (howto_table[i].name, r_name) == 0)
431 return &howto_table[i];
432
433 return NULL;
434}
435
252b5132 436#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
157090f7 437#define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
252b5132 438#define ELF_ARCH bfd_arch_m68k
ae95ffa6 439#define ELF_TARGET_ID M68K_ELF_DATA
252b5132
RH		 440\f
441/* Functions for the m68k ELF linker. */
442
443/* The name of the dynamic interpreter. This is put in the .interp
444 section. */
445
446#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
447
cc3e26be
RS		 448/* Describes one of the various PLT styles. */
449
450struct elf_m68k_plt_info
451{
452 /* The size of each PLT entry. */
453 bfd_vma size;
454
455 /* The template for the first PLT entry. */
456 const bfd_byte *plt0_entry;
457
458 /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations.
459 The comments by each member indicate the value that the relocation
460 is against. */
461 struct {
462 unsigned int got4; /* .got + 4 */
463 unsigned int got8; /* .got + 8 */
464 } plt0_relocs;
465
466 /* The template for a symbol's PLT entry. */
467 const bfd_byte *symbol_entry;
468
469 /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations.
470 The comments by each member indicate the value that the relocation
471 is against. */
472 struct {
473 unsigned int got; /* the symbol's .got.plt entry */
474 unsigned int plt; /* .plt */
475 } symbol_relocs;
476
477 /* The offset of the resolver stub from the start of SYMBOL_ENTRY.
478 The stub starts with "move.l #relocoffset,%d0". */
479 bfd_vma symbol_resolve_entry;
480};
481
252b5132
RH		 482/* The size in bytes of an entry in the procedure linkage table. */
483
484#define PLT_ENTRY_SIZE 20
485
486/* The first entry in a procedure linkage table looks like this. See
487 the SVR4 ABI m68k supplement to see how this works. */
488
489static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
490{
491 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
cc3e26be 492 0, 0, 0, 2, /* + (.got + 4) - . */
252b5132 493 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
cc3e26be 494 0, 0, 0, 2, /* + (.got + 8) - . */
252b5132
RH		 495 0, 0, 0, 0 /* pad out to 20 bytes. */
496};
497
498/* Subsequent entries in a procedure linkage table look like this. */
499
500static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
501{
502 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
cc3e26be 503 0, 0, 0, 2, /* + (.got.plt entry) - . */
252b5132 504 0x2f, 0x3c, /* move.l #offset,-(%sp) */
cc3e26be 505 0, 0, 0, 0, /* + reloc index */
252b5132 506 0x60, 0xff, /* bra.l .plt */
cc3e26be 507 0, 0, 0, 0 /* + .plt - . */
252b5132
RH		 508};
509
cc3e26be
RS		 510static const struct elf_m68k_plt_info elf_m68k_plt_info = {
511 PLT_ENTRY_SIZE,
512 elf_m68k_plt0_entry, { 4, 12 },
513 elf_m68k_plt_entry, { 4, 16 }, 8
514};
238d258f 515
7fb9f789 516#define ISAB_PLT_ENTRY_SIZE 24
238d258f 517
cc3e26be 518static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] =
238d258f 519{
cc3e26be
RS		 520 0x20, 0x3c, /* move.l #offset,%d0 */
521 0, 0, 0, 0, /* + (.got + 4) - . */
522 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */
523 0x20, 0x3c, /* move.l #offset,%d0 */
524 0, 0, 0, 0, /* + (.got + 8) - . */
525 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
238d258f
NC		 526 0x4e, 0xd0, /* jmp (%a0) */
527 0x4e, 0x71 /* nop */
528};
529
530/* Subsequent entries in a procedure linkage table look like this. */
531
cc3e26be 532static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] =
238d258f 533{
cc3e26be
RS		 534 0x20, 0x3c, /* move.l #offset,%d0 */
535 0, 0, 0, 0, /* + (.got.plt entry) - . */
536 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
238d258f
NC		 537 0x4e, 0xd0, /* jmp (%a0) */
538 0x2f, 0x3c, /* move.l #offset,-(%sp) */
cc3e26be 539 0, 0, 0, 0, /* + reloc index */
238d258f 540 0x60, 0xff, /* bra.l .plt */
cc3e26be 541 0, 0, 0, 0 /* + .plt - . */
238d258f
NC		 542};
543
cc3e26be
RS		 544static const struct elf_m68k_plt_info elf_isab_plt_info = {
545 ISAB_PLT_ENTRY_SIZE,
546 elf_isab_plt0_entry, { 2, 12 },
547 elf_isab_plt_entry, { 2, 20 }, 12
548};
9e1281c7 549
7fb9f789 550#define ISAC_PLT_ENTRY_SIZE 24
9a2e615a
NS		 551
552static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] =
553{
554 0x20, 0x3c, /* move.l #offset,%d0 */
555 0, 0, 0, 0, /* replaced with .got + 4 - . */
556 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
557 0x20, 0x3c, /* move.l #offset,%d0 */
558 0, 0, 0, 0, /* replaced with .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
566static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] =
567{
568 0x20, 0x3c, /* move.l #offset,%d0 */
569 0, 0, 0, 0, /* replaced with (.got 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, /* replaced with offset into relocation table */
574 0x61, 0xff, /* bsr.l .plt */
575 0, 0, 0, 0 /* replaced with .plt - . */
576};
577
578static const struct elf_m68k_plt_info elf_isac_plt_info = {
579 ISAC_PLT_ENTRY_SIZE,
580 elf_isac_plt0_entry, { 2, 12},
581 elf_isac_plt_entry, { 2, 20 }, 12
582};
583
cc3e26be 584#define CPU32_PLT_ENTRY_SIZE 24
9e1281c7 585/* Procedure linkage table entries for the cpu32 */
cc3e26be 586static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] =
9e1281c7 587{
6091b433 588 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
cc3e26be 589 0, 0, 0, 2, /* + (.got + 4) - . */
6091b433 590 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
cc3e26be 591 0, 0, 0, 2, /* + (.got + 8) - . */
6091b433 592 0x4e, 0xd1, /* jmp %a1@ */
9e1281c7
CM		 593 0, 0, 0, 0, /* pad out to 24 bytes. */
594 0, 0
595};
596
cc3e26be 597static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] =
9e1281c7 598{
1ca42bad 599 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
cc3e26be 600 0, 0, 0, 2, /* + (.got.plt entry) - . */
1ca42bad 601 0x4e, 0xd1, /* jmp %a1@ */
9e1281c7 602 0x2f, 0x3c, /* move.l #offset,-(%sp) */
cc3e26be 603 0, 0, 0, 0, /* + reloc index */
9e1281c7 604 0x60, 0xff, /* bra.l .plt */
cc3e26be 605 0, 0, 0, 0, /* + .plt - . */
9e1281c7
CM		 606 0, 0
607};
608
cc3e26be
RS		 609static const struct elf_m68k_plt_info elf_cpu32_plt_info = {
610 CPU32_PLT_ENTRY_SIZE,
611 elf_cpu32_plt0_entry, { 4, 12 },
612 elf_cpu32_plt_entry, { 4, 18 }, 10
613};
614
252b5132
RH		 615/* The m68k linker needs to keep track of the number of relocs that it
616 decides to copy in check_relocs for each symbol. This is so that it
617 can discard PC relative relocs if it doesn't need them when linking
618 with -Bsymbolic. We store the information in a field extending the
619 regular ELF linker hash table. */
620
621/* This structure keeps track of the number of PC relative relocs we have
622 copied for a given symbol. */
623
624struct elf_m68k_pcrel_relocs_copied
625{
626 /* Next section. */
627 struct elf_m68k_pcrel_relocs_copied *next;
628 /* A section in dynobj. */
629 asection *section;
630 /* Number of relocs copied in this section. */
631 bfd_size_type count;
632};
633
7fb9f789
NC		 634/* Forward declaration. */
635struct elf_m68k_got_entry;
636
252b5132
RH		 637/* m68k ELF linker hash entry. */
638
639struct elf_m68k_link_hash_entry
640{
641 struct elf_link_hash_entry root;
642
643 /* Number of PC relative relocs copied for this symbol. */
644 struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
7fb9f789
NC		 645
646 /* Key to got_entries. */
647 unsigned long got_entry_key;
648
649 /* List of GOT entries for this symbol. This list is build during
650 offset finalization and is used within elf_m68k_finish_dynamic_symbol
651 to traverse all GOT entries for a particular symbol.
652
653 ??? We could've used root.got.glist field instead, but having
654 a separate field is cleaner. */
655 struct elf_m68k_got_entry *glist;
252b5132
RH		 656};
657
0cca5f05
AS		 658#define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
659
7fb9f789
NC		 660/* Key part of GOT entry in hashtable. */
661struct elf_m68k_got_entry_key
662{
663 /* BFD in which this symbol was defined. NULL for global symbols. */
664 const bfd *bfd;
665
666 /* Symbol index. Either local symbol index or h->got_entry_key. */
667 unsigned long symndx;
cf869cce
NC		 668
669 /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32},
670 R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}.
671
672 From perspective of hashtable key, only elf_m68k_got_reloc_type (type)
673 matters. That is, we distinguish between, say, R_68K_GOT16O
674 and R_68K_GOT32O when allocating offsets, but they are considered to be
675 the same when searching got->entries. */
676 enum elf_m68k_reloc_type type;
7fb9f789
NC		 677};
678
cf869cce
NC		 679/* Size of the GOT offset suitable for relocation. */
680enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST };
681
7fb9f789
NC		 682/* Entry of the GOT. */
683struct elf_m68k_got_entry
684{
685 /* GOT entries are put into a got->entries hashtable. This is the key. */
686 struct elf_m68k_got_entry_key key_;
687
688 /* GOT entry data. We need s1 before offset finalization and s2 after. */
689 union
690 {
691 struct
692 {
693 /* Number of times this entry is referenced. It is used to
694 filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook. */
695 bfd_vma refcount;
7fb9f789
NC		 696 } s1;
697
698 struct
699 {
700 /* Offset from the start of .got section. To calculate offset relative
701 to GOT pointer one should substract got->offset from this value. */
702 bfd_vma offset;
703
704 /* Pointer to the next GOT entry for this global symbol.
705 Symbols have at most one entry in one GOT, but might
706 have entries in more than one GOT.
707 Root of this list is h->glist.
708 NULL for local symbols. */
709 struct elf_m68k_got_entry *next;
710 } s2;
711 } u;
712};
713
cf869cce
NC		 714/* Return representative type for relocation R_TYPE.
715 This is used to avoid enumerating many relocations in comparisons,
716 switches etc. */
717
718static enum elf_m68k_reloc_type
719elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type)
720{
721 switch (r_type)
722 {
723 /* In most cases R_68K_GOTx relocations require the very same
724 handling as R_68K_GOT32O relocation. In cases when we need
725 to distinguish between the two, we use explicitly compare against
726 r_type. */
727 case R_68K_GOT32:
728 case R_68K_GOT16:
729 case R_68K_GOT8:
730 case R_68K_GOT32O:
731 case R_68K_GOT16O:
732 case R_68K_GOT8O:
733 return R_68K_GOT32O;
734
735 case R_68K_TLS_GD32:
736 case R_68K_TLS_GD16:
737 case R_68K_TLS_GD8:
738 return R_68K_TLS_GD32;
739
740 case R_68K_TLS_LDM32:
741 case R_68K_TLS_LDM16:
742 case R_68K_TLS_LDM8:
743 return R_68K_TLS_LDM32;
744
745 case R_68K_TLS_IE32:
746 case R_68K_TLS_IE16:
747 case R_68K_TLS_IE8:
748 return R_68K_TLS_IE32;
749
750 default:
751 BFD_ASSERT (FALSE);
752 return 0;
753 }
754}
755
756/* Return size of the GOT entry offset for relocation R_TYPE. */
757
758static enum elf_m68k_got_offset_size
759elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type)
760{
761 switch (r_type)
762 {
763 case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8:
764 case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32:
765 case R_68K_TLS_IE32:
766 return R_32;
767
768 case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16:
769 case R_68K_TLS_IE16:
770 return R_16;
771
772 case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8:
773 case R_68K_TLS_IE8:
774 return R_8;
775
776 default:
777 BFD_ASSERT (FALSE);
778 return 0;
779 }
780}
781
782/* Return number of GOT entries we need to allocate in GOT for
783 relocation R_TYPE. */
784
785static bfd_vma
786elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type)
787{
788 switch (elf_m68k_reloc_got_type (r_type))
789 {
790 case R_68K_GOT32O:
791 case R_68K_TLS_IE32:
792 return 1;
793
794 case R_68K_TLS_GD32:
795 case R_68K_TLS_LDM32:
796 return 2;
797
798 default:
799 BFD_ASSERT (FALSE);
800 return 0;
801 }
802}
803
804/* Return TRUE if relocation R_TYPE is a TLS one. */
805
806static bfd_boolean
807elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type)
808{
809 switch (r_type)
810 {
811 case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8:
812 case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8:
813 case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8:
814 case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8:
815 case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8:
816 case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32:
817 return TRUE;
818
819 default:
820 return FALSE;
821 }
822}
823
7fb9f789
NC		 824/* Data structure representing a single GOT. */
825struct elf_m68k_got
826{
827 /* Hashtable of 'struct elf_m68k_got_entry's.
828 Starting size of this table is the maximum number of
829 R_68K_GOT8O entries. */
830 htab_t entries;
831
cf869cce
NC		 832 /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require
833 several GOT slots.
7fb9f789 834
cf869cce
NC		 835 n_slots[R_8] is the count of R_8 slots in this GOT.
836 n_slots[R_16] is the cumulative count of R_8 and R_16 slots
837 in this GOT.
838 n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots
839 in this GOT. This is the total number of slots. */
840 bfd_vma n_slots[R_LAST];
7fb9f789 841
cf869cce 842 /* Number of local (entry->key_.h == NULL) slots in this GOT.
7fb9f789
NC		 843 This is only used to properly calculate size of .rela.got section;
844 see elf_m68k_partition_multi_got. */
cf869cce 845 bfd_vma local_n_slots;
7fb9f789
NC		 846
847 /* Offset of this GOT relative to beginning of .got section. */
848 bfd_vma offset;
849};
850
851/* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */
852struct elf_m68k_bfd2got_entry
853{
854 /* BFD. */
855 const bfd *bfd;
856
857 /* Assigned GOT. Before partitioning multi-GOT each BFD has its own
858 GOT structure. After partitioning several BFD's might [and often do]
859 share a single GOT. */
860 struct elf_m68k_got *got;
861};
862
863/* The main data structure holding all the pieces. */
864struct elf_m68k_multi_got
865{
866 /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry
867 here, then it doesn't need a GOT (this includes the case of a BFD
868 having an empty GOT).
869
870 ??? This hashtable can be replaced by an array indexed by bfd->id. */
871 htab_t bfd2got;
872
873 /* Next symndx to assign a global symbol.
874 h->got_entry_key is initialized from this counter. */
875 unsigned long global_symndx;
876};
877
252b5132
RH		 878/* m68k ELF linker hash table. */
879
880struct elf_m68k_link_hash_table
881{
882 struct elf_link_hash_table root;
b6152c34 883
87d72d41
AM		 884 /* Small local sym cache. */
885 struct sym_cache sym_cache;
cc3e26be
RS		 886
887 /* The PLT format used by this link, or NULL if the format has not
888 yet been chosen. */
889 const struct elf_m68k_plt_info *plt_info;
7fb9f789
NC		 890
891 /* True, if GP is loaded within each function which uses it.
892 Set to TRUE when GOT negative offsets or multi-GOT is enabled. */
893 bfd_boolean local_gp_p;
894
895 /* Switch controlling use of negative offsets to double the size of GOTs. */
896 bfd_boolean use_neg_got_offsets_p;
897
898 /* Switch controlling generation of multiple GOTs. */
899 bfd_boolean allow_multigot_p;
900
901 /* Multi-GOT data structure. */
902 struct elf_m68k_multi_got multi_got_;
252b5132
RH		 903};
904
252b5132
RH		 905/* Get the m68k ELF linker hash table from a link_info structure. */
906
907#define elf_m68k_hash_table(p) \
4dfe6ac6
NC		 908 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
909 == M68K_ELF_DATA ? ((struct elf_m68k_link_hash_table *) ((p)->hash)) : NULL)
252b5132 910
7fb9f789
NC		 911/* Shortcut to multi-GOT data. */
912#define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_)
913
252b5132
RH		 914/* Create an entry in an m68k ELF linker hash table. */
915
916static struct bfd_hash_entry *
4dfe6ac6
NC		 917elf_m68k_link_hash_newfunc (struct bfd_hash_entry *entry,
918 struct bfd_hash_table *table,
919 const char *string)
252b5132 920{
0cca5f05 921 struct bfd_hash_entry *ret = entry;
252b5132
RH		 922
923 /* Allocate the structure if it has not already been allocated by a
924 subclass. */
0cca5f05
AS		 925 if (ret == NULL)
926 ret = bfd_hash_allocate (table,
927 sizeof (struct elf_m68k_link_hash_entry));
928 if (ret == NULL)
929 return ret;
252b5132
RH		 930
931 /* Call the allocation method of the superclass. */
0cca5f05
AS		 932 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
933 if (ret != NULL)
7fb9f789
NC		 934 {
935 elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL;
936 elf_m68k_hash_entry (ret)->got_entry_key = 0;
937 elf_m68k_hash_entry (ret)->glist = NULL;
938 }
252b5132 939
0cca5f05 940 return ret;
252b5132
RH		 941}
942
68faa637
AM		 943/* Destroy an m68k ELF linker hash table. */
944
945static void
d495ab0d 946elf_m68k_link_hash_table_free (bfd *obfd)
68faa637
AM		 947{
948 struct elf_m68k_link_hash_table *htab;
949
d495ab0d 950 htab = (struct elf_m68k_link_hash_table *) obfd->link.hash;
68faa637
AM		 951
952 if (htab->multi_got_.bfd2got != NULL)
953 {
954 htab_delete (htab->multi_got_.bfd2got);
955 htab->multi_got_.bfd2got = NULL;
956 }
d495ab0d 957 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 958}
959
252b5132
RH		 960/* Create an m68k ELF linker hash table. */
961
962static struct bfd_link_hash_table *
4dfe6ac6 963elf_m68k_link_hash_table_create (bfd *abfd)
252b5132
RH		 964{
965 struct elf_m68k_link_hash_table *ret;
dc810e39 966 bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table);
252b5132 967
7bf52ea2 968 ret = (struct elf_m68k_link_hash_table *) bfd_zmalloc (amt);
252b5132
RH		 969 if (ret == (struct elf_m68k_link_hash_table *) NULL)
970 return NULL;
971
66eb6687
AM		 972 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
973 elf_m68k_link_hash_newfunc,
4dfe6ac6
NC		 974 sizeof (struct elf_m68k_link_hash_entry),
975 M68K_ELF_DATA))
252b5132 976 {
e2d34d7d 977 free (ret);
252b5132
RH		 978 return NULL;
979 }
d495ab0d 980 ret->root.root.hash_table_free = elf_m68k_link_hash_table_free;
252b5132 981
7fb9f789 982 ret->multi_got_.global_symndx = 1;
b6152c34 983
252b5132
RH		 984 return &ret->root.root;
985}
986
266abb8f
NS		 987/* Set the right machine number. */
988
989static bfd_boolean
990elf32_m68k_object_p (bfd *abfd)
991{
992 unsigned int mach = 0;
993 unsigned features = 0;
994 flagword eflags = elf_elfheader (abfd)->e_flags;
995
425c6cb0 996 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
266abb8f 997 features |= m68000;
425c6cb0 998 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
3bdcfdf4
KH		 999 features |= cpu32;
1000 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1001 features |= fido_a;
425c6cb0 1002 else
266abb8f 1003 {
c694fd50 1004 switch (eflags & EF_M68K_CF_ISA_MASK)
266abb8f 1005 {
c694fd50 1006 case EF_M68K_CF_ISA_A_NODIV:
266abb8f
NS		 1007 features |= mcfisa_a;
1008 break;
c694fd50 1009 case EF_M68K_CF_ISA_A:
0b2e31dc
NS		 1010 features |= mcfisa_a|mcfhwdiv;
1011 break;
c694fd50 1012 case EF_M68K_CF_ISA_A_PLUS:
0b2e31dc
NS		 1013 features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp;
1014 break;
c694fd50 1015 case EF_M68K_CF_ISA_B_NOUSP:
0b2e31dc
NS		 1016 features |= mcfisa_a|mcfisa_b|mcfhwdiv;
1017 break;
c694fd50 1018 case EF_M68K_CF_ISA_B:
0b2e31dc
NS		 1019 features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp;
1020 break;
9a2e615a
NS		 1021 case EF_M68K_CF_ISA_C:
1022 features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp;
1023 break;
8d100c32
KH		 1024 case EF_M68K_CF_ISA_C_NODIV:
1025 features |= mcfisa_a|mcfisa_c|mcfusp;
1026 break;
266abb8f 1027 }
c694fd50 1028 switch (eflags & EF_M68K_CF_MAC_MASK)
266abb8f 1029 {
c694fd50 1030 case EF_M68K_CF_MAC:
266abb8f
NS		 1031 features |= mcfmac;
1032 break;
c694fd50 1033 case EF_M68K_CF_EMAC:
266abb8f
NS		 1034 features |= mcfemac;
1035 break;
1036 }
c694fd50 1037 if (eflags & EF_M68K_CF_FLOAT)
266abb8f
NS		 1038 features |= cfloat;
1039 }
1040
1041 mach = bfd_m68k_features_to_mach (features);
1042 bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach);
1043
1044 return TRUE;
1045}
1046
fc9f1df9
NC		 1047/* Somewhat reverse of elf32_m68k_object_p, this sets the e_flag
1048 field based on the machine number. */
1049
1050static void
1051elf_m68k_final_write_processing (bfd *abfd,
1052 bfd_boolean linker ATTRIBUTE_UNUSED)
1053{
1054 int mach = bfd_get_mach (abfd);
1055 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
1056
1057 if (!e_flags)
1058 {
1059 unsigned int arch_mask;
1060
1061 arch_mask = bfd_m68k_mach_to_features (mach);
1062
1063 if (arch_mask & m68000)
1064 e_flags = EF_M68K_M68000;
1065 else if (arch_mask & cpu32)
1066 e_flags = EF_M68K_CPU32;
1067 else if (arch_mask & fido_a)
1068 e_flags = EF_M68K_FIDO;
1069 else
1070 {
1071 switch (arch_mask
1072 & (mcfisa_a | mcfisa_aa | mcfisa_b | mcfisa_c | mcfhwdiv | mcfusp))
1073 {
1074 case mcfisa_a:
1075 e_flags |= EF_M68K_CF_ISA_A_NODIV;
1076 break;
1077 case mcfisa_a | mcfhwdiv:
1078 e_flags |= EF_M68K_CF_ISA_A;
1079 break;
1080 case mcfisa_a | mcfisa_aa | mcfhwdiv | mcfusp:
1081 e_flags |= EF_M68K_CF_ISA_A_PLUS;
1082 break;
1083 case mcfisa_a | mcfisa_b | mcfhwdiv:
1084 e_flags |= EF_M68K_CF_ISA_B_NOUSP;
1085 break;
1086 case mcfisa_a | mcfisa_b | mcfhwdiv | mcfusp:
1087 e_flags |= EF_M68K_CF_ISA_B;
1088 break;
1089 case mcfisa_a | mcfisa_c | mcfhwdiv | mcfusp:
1090 e_flags |= EF_M68K_CF_ISA_C;
1091 break;
1092 case mcfisa_a | mcfisa_c | mcfusp:
1093 e_flags |= EF_M68K_CF_ISA_C_NODIV;
1094 break;
1095 }
1096 if (arch_mask & mcfmac)
1097 e_flags |= EF_M68K_CF_MAC;
1098 else if (arch_mask & mcfemac)
1099 e_flags |= EF_M68K_CF_EMAC;
1100 if (arch_mask & cfloat)
1101 e_flags |= EF_M68K_CF_FLOAT | EF_M68K_CFV4E;
1102 }
1103 elf_elfheader (abfd)->e_flags = e_flags;
1104 }
1105}
1106
ae9a127f 1107/* Keep m68k-specific flags in the ELF header. */
fc9f1df9 1108
b34976b6 1109static bfd_boolean
2c3fc389 1110elf32_m68k_set_private_flags (bfd *abfd, flagword flags)
9e1281c7
CM		 1111{
1112 elf_elfheader (abfd)->e_flags = flags;
b34976b6
AM		 1113 elf_flags_init (abfd) = TRUE;
1114 return TRUE;
9e1281c7
CM		 1115}
1116
9e1281c7
CM		 1117/* Merge backend specific data from an object file to the output
1118 object file when linking. */
b34976b6 1119static bfd_boolean
2c3fc389 1120elf32_m68k_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
9e1281c7
CM		 1121{
1122 flagword out_flags;
1123 flagword in_flags;
a9d34880
RS		 1124 flagword out_isa;
1125 flagword in_isa;
1126 const bfd_arch_info_type *arch_info;
7fb9f789 1127
9e1281c7
CM		 1128 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1129 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
266abb8f
NS		 1130 return FALSE;
1131
a9d34880
RS		 1132 /* Get the merged machine. This checks for incompatibility between
1133 Coldfire & non-Coldfire flags, incompability between different
1134 Coldfire ISAs, and incompability between different MAC types. */
1135 arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE);
1136 if (!arch_info)
1137 return FALSE;
9e1281c7 1138
7fb9f789
NC		 1139 bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach);
1140
1141 in_flags = elf_elfheader (ibfd)->e_flags;
1142 if (!elf_flags_init (obfd))
1143 {
1144 elf_flags_init (obfd) = TRUE;
1145 out_flags = in_flags;
1146 }
1147 else
1148 {
1149 out_flags = elf_elfheader (obfd)->e_flags;
1150 unsigned int variant_mask;
1151
1152 if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1153 variant_mask = 0;
1154 else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1155 variant_mask = 0;
1156 else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1157 variant_mask = 0;
1158 else
1159 variant_mask = EF_M68K_CF_ISA_MASK;
1160
1161 in_isa = (in_flags & variant_mask);
1162 out_isa = (out_flags & variant_mask);
1163 if (in_isa > out_isa)
1164 out_flags ^= in_isa ^ out_isa;
1165 if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32
1166 && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1167 || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO
1168 && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32))
1169 out_flags = EF_M68K_FIDO;
1170 else
1171 out_flags |= in_flags ^ in_isa;
1172 }
1173 elf_elfheader (obfd)->e_flags = out_flags;
1174
1175 return TRUE;
1176}
1177
1178/* Display the flags field. */
1179
1180static bfd_boolean
1181elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr)
1182{
1183 FILE *file = (FILE *) ptr;
1184 flagword eflags = elf_elfheader (abfd)->e_flags;
1185
1186 BFD_ASSERT (abfd != NULL && ptr != NULL);
1187
1188 /* Print normal ELF private data. */
1189 _bfd_elf_print_private_bfd_data (abfd, ptr);
1190
1191 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
1192
1193 /* xgettext:c-format */
1194 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
1195
1196 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1197 fprintf (file, " [m68000]");
1198 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1199 fprintf (file, " [cpu32]");
1200 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1201 fprintf (file, " [fido]");
1202 else
1203 {
1204 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E)
1205 fprintf (file, " [cfv4e]");
1206
1207 if (eflags & EF_M68K_CF_ISA_MASK)
1208 {
1209 char const *isa = _("unknown");
1210 char const *mac = _("unknown");
1211 char const *additional = "";
1212
1213 switch (eflags & EF_M68K_CF_ISA_MASK)
1214 {
1215 case EF_M68K_CF_ISA_A_NODIV:
1216 isa = "A";
1217 additional = " [nodiv]";
1218 break;
1219 case EF_M68K_CF_ISA_A:
1220 isa = "A";
1221 break;
1222 case EF_M68K_CF_ISA_A_PLUS:
1223 isa = "A+";
1224 break;
1225 case EF_M68K_CF_ISA_B_NOUSP:
1226 isa = "B";
1227 additional = " [nousp]";
1228 break;
1229 case EF_M68K_CF_ISA_B:
1230 isa = "B";
1231 break;
1232 case EF_M68K_CF_ISA_C:
1233 isa = "C";
1234 break;
1235 case EF_M68K_CF_ISA_C_NODIV:
1236 isa = "C";
1237 additional = " [nodiv]";
1238 break;
1239 }
1240 fprintf (file, " [isa %s]%s", isa, additional);
1241
1242 if (eflags & EF_M68K_CF_FLOAT)
1243 fprintf (file, " [float]");
1244
1245 switch (eflags & EF_M68K_CF_MAC_MASK)
1246 {
1247 case 0:
1248 mac = NULL;
1249 break;
1250 case EF_M68K_CF_MAC:
1251 mac = "mac";
1252 break;
1253 case EF_M68K_CF_EMAC:
1254 mac = "emac";
1255 break;
f608cd77
NS		 1256 case EF_M68K_CF_EMAC_B:
1257 mac = "emac_b";
1258 break;
7fb9f789
NC		 1259 }
1260 if (mac)
1261 fprintf (file, " [%s]", mac);
1262 }
1263 }
1264
1265 fputc ('\n', file);
1266
1267 return TRUE;
1268}
1269
1270/* Multi-GOT support implementation design:
1271
1272 Multi-GOT starts in check_relocs hook. There we scan all
1273 relocations of a BFD and build a local GOT (struct elf_m68k_got)
1274 for it. If a single BFD appears to require too many GOT slots with
1275 R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification
1276 to user.
1277 After check_relocs has been invoked for each input BFD, we have
1278 constructed a GOT for each input BFD.
1279
1280 To minimize total number of GOTs required for a particular output BFD
1281 (as some environments support only 1 GOT per output object) we try
1282 to merge some of the GOTs to share an offset space. Ideally [and in most
1283 cases] we end up with a single GOT. In cases when there are too many
1284 restricted relocations (e.g., R_68K_GOT16O relocations) we end up with
1285 several GOTs, assuming the environment can handle them.
1286
1287 Partitioning is done in elf_m68k_partition_multi_got. We start with
1288 an empty GOT and traverse bfd2got hashtable putting got_entries from
1289 local GOTs to the new 'big' one. We do that by constructing an
1290 intermediate GOT holding all the entries the local GOT has and the big
1291 GOT lacks. Then we check if there is room in the big GOT to accomodate
1292 all the entries from diff. On success we add those entries to the big
1293 GOT; on failure we start the new 'big' GOT and retry the adding of
1294 entries from the local GOT. Note that this retry will always succeed as
1295 each local GOT doesn't overflow the limits. After partitioning we
1296 end up with each bfd assigned one of the big GOTs. GOT entries in the
1297 big GOTs are initialized with GOT offsets. Note that big GOTs are
1298 positioned consequently in program space and represent a single huge GOT
1299 to the outside world.
1300
1301 After that we get to elf_m68k_relocate_section. There we
1302 adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol
1303 relocations to refer to appropriate [assigned to current input_bfd]
1304 big GOT.
1305
1306 Notes:
1307
cf869cce
NC		 1308 GOT entry type: We have several types of GOT entries.
1309 * R_8 type is used in entries for symbols that have at least one
1310 R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40
7fb9f789 1311 such entries in one GOT.
cf869cce
NC		 1312 * R_16 type is used in entries for symbols that have at least one
1313 R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations.
7fb9f789 1314 We can have at most 0x4000 such entries in one GOT.
cf869cce
NC		 1315 * R_32 type is used in all other cases. We can have as many
1316 such entries in one GOT as we'd like.
7fb9f789
NC		 1317 When counting relocations we have to include the count of the smaller
1318 ranged relocations in the counts of the larger ranged ones in order
1319 to correctly detect overflow.
1320
1321 Sorting the GOT: In each GOT starting offsets are assigned to
cf869cce
NC		 1322 R_8 entries, which are followed by R_16 entries, and
1323 R_32 entries go at the end. See finalize_got_offsets for details.
7fb9f789
NC		 1324
1325 Negative GOT offsets: To double usable offset range of GOTs we use
1326 negative offsets. As we assign entries with GOT offsets relative to
1327 start of .got section, the offset values are positive. They become
1328 negative only in relocate_section where got->offset value is
1329 subtracted from them.
1330
1331 3 special GOT entries: There are 3 special GOT entries used internally
1332 by loader. These entries happen to be placed to .got.plt section,
1333 so we don't do anything about them in multi-GOT support.
1334
1335 Memory management: All data except for hashtables
1336 multi_got->bfd2got and got->entries are allocated on
1337 elf_hash_table (info)->dynobj bfd (for this reason we pass 'info'
1338 to most functions), so we don't need to care to free them. At the
1339 moment of allocation hashtables are being linked into main data
1340 structure (multi_got), all pieces of which are reachable from
1341 elf_m68k_multi_got (info). We deallocate them in
1342 elf_m68k_link_hash_table_free. */
1343
1344/* Initialize GOT. */
1345
1346static void
cf869cce
NC		 1347elf_m68k_init_got (struct elf_m68k_got *got)
1348{
1349 got->entries = NULL;
1350 got->n_slots[R_8] = 0;
1351 got->n_slots[R_16] = 0;
1352 got->n_slots[R_32] = 0;
1353 got->local_n_slots = 0;
1354 got->offset = (bfd_vma) -1;
7fb9f789
NC		 1355}
1356
1357/* Destruct GOT. */
1358
1359static void
1360elf_m68k_clear_got (struct elf_m68k_got *got)
1361{
1362 if (got->entries != NULL)
1363 {
1364 htab_delete (got->entries);
1365 got->entries = NULL;
1366 }
1367}
1368
1369/* Create and empty GOT structure. INFO is the context where memory
1370 should be allocated. */
1371
1372static struct elf_m68k_got *
1373elf_m68k_create_empty_got (struct bfd_link_info *info)
1374{
1375 struct elf_m68k_got *got;
1376
1377 got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got));
1378 if (got == NULL)
1379 return NULL;
1380
cf869cce 1381 elf_m68k_init_got (got);
7fb9f789
NC		 1382
1383 return got;
1384}
1385
1386/* Initialize KEY. */
1387
1388static void
1389elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key,
1390 struct elf_link_hash_entry *h,
cf869cce
NC		 1391 const bfd *abfd, unsigned long symndx,
1392 enum elf_m68k_reloc_type reloc_type)
7fb9f789 1393{
cf869cce
NC		 1394 if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32)
1395 /* All TLS_LDM relocations share a single GOT entry. */
1396 {
1397 key->bfd = NULL;
1398 key->symndx = 0;
1399 }
1400 else if (h != NULL)
1401 /* Global symbols are identified with their got_entry_key. */
7fb9f789
NC		 1402 {
1403 key->bfd = NULL;
1404 key->symndx = elf_m68k_hash_entry (h)->got_entry_key;
1405 BFD_ASSERT (key->symndx != 0);
1406 }
1407 else
cf869cce 1408 /* Local symbols are identified by BFD they appear in and symndx. */
7fb9f789
NC		 1409 {
1410 key->bfd = abfd;
1411 key->symndx = symndx;
1412 }
cf869cce
NC		 1413
1414 key->type = reloc_type;
7fb9f789
NC		 1415}
1416
1417/* Calculate hash of got_entry.
1418 ??? Is it good? */
1419
1420static hashval_t
1421elf_m68k_got_entry_hash (const void *_entry)
1422{
1423 const struct elf_m68k_got_entry_key *key;
1424
1425 key = &((const struct elf_m68k_got_entry *) _entry)->key_;
1426
cf869cce
NC		 1427 return (key->symndx
1428 + (key->bfd != NULL ? (int) key->bfd->id : -1)
1429 + elf_m68k_reloc_got_type (key->type));
7fb9f789
NC		 1430}
1431
1432/* Check if two got entries are equal. */
1433
1434static int
1435elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2)
1436{
1437 const struct elf_m68k_got_entry_key *key1;
1438 const struct elf_m68k_got_entry_key *key2;
1439
1440 key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_;
1441 key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_;
1442
1443 return (key1->bfd == key2->bfd
cf869cce
NC		 1444 && key1->symndx == key2->symndx
1445 && (elf_m68k_reloc_got_type (key1->type)
1446 == elf_m68k_reloc_got_type (key2->type)));
7fb9f789
NC		 1447}
1448
cf869cce
NC		 1449/* When using negative offsets, we allocate one extra R_8, one extra R_16
1450 and one extra R_32 slots to simplify handling of 2-slot entries during
1451 offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */
1452
1453/* Maximal number of R_8 slots in a single GOT. */
1454#define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \
7fb9f789 1455 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
cf869cce 1456 ? (0x40 - 1) \
7fb9f789
NC		 1457 : 0x20)
1458
cf869cce
NC		 1459/* Maximal number of R_8 and R_16 slots in a single GOT. */
1460#define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \
7fb9f789 1461 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
cf869cce 1462 ? (0x4000 - 2) \
7fb9f789
NC		 1463 : 0x2000)
1464
1465/* SEARCH - simply search the hashtable, don't insert new entries or fail when
1466 the entry cannot be found.
1467 FIND_OR_CREATE - search for an existing entry, but create new if there's
1468 no such.
1469 MUST_FIND - search for an existing entry and assert that it exist.
1470 MUST_CREATE - assert that there's no such entry and create new one. */
1471enum elf_m68k_get_entry_howto
1472 {
1473 SEARCH,
1474 FIND_OR_CREATE,
1475 MUST_FIND,
1476 MUST_CREATE
1477 };
1478
1479/* Get or create (depending on HOWTO) entry with KEY in GOT.
1480 INFO is context in which memory should be allocated (can be NULL if
1481 HOWTO is SEARCH or MUST_FIND). */
1482
1483static struct elf_m68k_got_entry *
1484elf_m68k_get_got_entry (struct elf_m68k_got *got,
1485 const struct elf_m68k_got_entry_key *key,
1486 enum elf_m68k_get_entry_howto howto,
1487 struct bfd_link_info *info)
1488{
1489 struct elf_m68k_got_entry entry_;
1490 struct elf_m68k_got_entry *entry;
1491 void **ptr;
1492
1493 BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1494
1495 if (got->entries == NULL)
1496 /* This is the first entry in ABFD. Initialize hashtable. */
1497 {
1498 if (howto == SEARCH)
1499 return NULL;
1500
cf869cce 1501 got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT
7fb9f789
NC		 1502 (info),
1503 elf_m68k_got_entry_hash,
1504 elf_m68k_got_entry_eq, NULL);
1505 if (got->entries == NULL)
1506 {
1507 bfd_set_error (bfd_error_no_memory);
1508 return NULL;
1509 }
1510 }
1511
1512 entry_.key_ = *key;
1513 ptr = htab_find_slot (got->entries, &entry_, (howto != SEARCH
1514 ? INSERT : NO_INSERT));
1515 if (ptr == NULL)
1516 {
1517 if (howto == SEARCH)
1518 /* Entry not found. */
1519 return NULL;
1520
1521 /* We're out of memory. */
1522 bfd_set_error (bfd_error_no_memory);
1523 return NULL;
1524 }
1525
1526 if (*ptr == NULL)
1527 /* We didn't find the entry and we're asked to create a new one. */
1528 {
1529 BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1530
1531 entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry));
1532 if (entry == NULL)
1533 return NULL;
1534
1535 /* Initialize new entry. */
1536 entry->key_ = *key;
1537
1538 entry->u.s1.refcount = 0;
cf869cce
NC		 1539
1540 /* Mark the entry as not initialized. */
1541 entry->key_.type = R_68K_max;
7fb9f789
NC		 1542
1543 *ptr = entry;
1544 }
1545 else
1546 /* We found the entry. */
1547 {
1548 BFD_ASSERT (howto != MUST_CREATE);
1549
1550 entry = *ptr;
1551 }
1552
1553 return entry;
1554}
1555
1556/* Update GOT counters when merging entry of WAS type with entry of NEW type.
1557 Return the value to which ENTRY's type should be set. */
1558
cf869cce
NC		 1559static enum elf_m68k_reloc_type
1560elf_m68k_update_got_entry_type (struct elf_m68k_got *got,
1561 enum elf_m68k_reloc_type was,
d3ce72d0 1562 enum elf_m68k_reloc_type new_reloc)
7fb9f789 1563{
cf869cce
NC		 1564 enum elf_m68k_got_offset_size was_size;
1565 enum elf_m68k_got_offset_size new_size;
1566 bfd_vma n_slots;
1567
1568 if (was == R_68K_max)
1569 /* The type of the entry is not initialized yet. */
7fb9f789 1570 {
cf869cce
NC		 1571 /* Update all got->n_slots counters, including n_slots[R_32]. */
1572 was_size = R_LAST;
7fb9f789 1573
d3ce72d0 1574 was = new_reloc;
7fb9f789 1575 }
7fb9f789 1576 else
cf869cce
NC		 1577 {
1578 /* !!! We, probably, should emit an error rather then fail on assert
1579 in such a case. */
1580 BFD_ASSERT (elf_m68k_reloc_got_type (was)
d3ce72d0 1581 == elf_m68k_reloc_got_type (new_reloc));
cf869cce
NC		 1582
1583 was_size = elf_m68k_reloc_got_offset_size (was);
1584 }
1585
d3ce72d0
NC		 1586 new_size = elf_m68k_reloc_got_offset_size (new_reloc);
1587 n_slots = elf_m68k_reloc_got_n_slots (new_reloc);
cf869cce
NC		 1588
1589 while (was_size > new_size)
1590 {
1591 --was_size;
1592 got->n_slots[was_size] += n_slots;
1593 }
7fb9f789 1594
d3ce72d0 1595 if (new_reloc > was)
cf869cce
NC		 1596 /* Relocations are ordered from bigger got offset size to lesser,
1597 so choose the relocation type with lesser offset size. */
d3ce72d0 1598 was = new_reloc;
cf869cce
NC		 1599
1600 return was;
7fb9f789
NC		 1601}
1602
1603/* Update GOT counters when removing an entry of type TYPE. */
1604
1605static void
cf869cce
NC		 1606elf_m68k_remove_got_entry_type (struct elf_m68k_got *got,
1607 enum elf_m68k_reloc_type type)
7fb9f789 1608{
cf869cce
NC		 1609 enum elf_m68k_got_offset_size os;
1610 bfd_vma n_slots;
7fb9f789 1611
cf869cce 1612 n_slots = elf_m68k_reloc_got_n_slots (type);
7fb9f789 1613
cf869cce
NC		 1614 /* Decrese counter of slots with offset size corresponding to TYPE
1615 and all greater offset sizes. */
1616 for (os = elf_m68k_reloc_got_offset_size (type); os <= R_32; ++os)
1617 {
1618 BFD_ASSERT (got->n_slots[os] >= n_slots);
7fb9f789 1619
cf869cce 1620 got->n_slots[os] -= n_slots;
7fb9f789
NC		 1621 }
1622}
1623
1624/* Add new or update existing entry to GOT.
1625 H, ABFD, TYPE and SYMNDX is data for the entry.
1626 INFO is a context where memory should be allocated. */
1627
1628static struct elf_m68k_got_entry *
1629elf_m68k_add_entry_to_got (struct elf_m68k_got *got,
1630 struct elf_link_hash_entry *h,
1631 const bfd *abfd,
cf869cce
NC		 1632 enum elf_m68k_reloc_type reloc_type,
1633 unsigned long symndx,
7fb9f789
NC		 1634 struct bfd_link_info *info)
1635{
1636 struct elf_m68k_got_entry_key key_;
1637 struct elf_m68k_got_entry *entry;
1638
1639 if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0)
1640 elf_m68k_hash_entry (h)->got_entry_key
1641 = elf_m68k_multi_got (info)->global_symndx++;
1642
cf869cce 1643 elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type);
7fb9f789
NC		 1644
1645 entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info);
1646 if (entry == NULL)
1647 return NULL;
1648
cf869cce
NC		 1649 /* Determine entry's type and update got->n_slots counters. */
1650 entry->key_.type = elf_m68k_update_got_entry_type (got,
1651 entry->key_.type,
1652 reloc_type);
1653
7fb9f789
NC		 1654 /* Update refcount. */
1655 ++entry->u.s1.refcount;
1656
1657 if (entry->u.s1.refcount == 1)
1658 /* We see this entry for the first time. */
1659 {
1660 if (entry->key_.bfd != NULL)
cf869cce 1661 got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type);
7fb9f789
NC		 1662 }
1663
cf869cce 1664 BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
7fb9f789 1665
cf869cce
NC		 1666 if ((got->n_slots[R_8]
1667 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1668 || (got->n_slots[R_16]
1669 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
7fb9f789
NC		 1670 /* This BFD has too many relocation. */
1671 {
cf869cce 1672 if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
7fb9f789 1673 (*_bfd_error_handler) (_("%B: GOT overflow: "
cf869cce
NC		 1674 "Number of relocations with 8-bit "
1675 "offset > %d"),
7fb9f789 1676 abfd,
cf869cce 1677 ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info));
7fb9f789
NC		 1678 else
1679 (*_bfd_error_handler) (_("%B: GOT overflow: "
cf869cce
NC		 1680 "Number of relocations with 8- or 16-bit "
1681 "offset > %d"),
7fb9f789 1682 abfd,
cf869cce 1683 ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info));
7fb9f789
NC		 1684
1685 return NULL;
1686 }
1687
1688 return entry;
1689}
1690
1691/* Compute the hash value of the bfd in a bfd2got hash entry. */
1692
1693static hashval_t
1694elf_m68k_bfd2got_entry_hash (const void *entry)
1695{
1696 const struct elf_m68k_bfd2got_entry *e;
1697
1698 e = (const struct elf_m68k_bfd2got_entry *) entry;
1699
1700 return e->bfd->id;
1701}
1702
1703/* Check whether two hash entries have the same bfd. */
1704
1705static int
1706elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2)
1707{
1708 const struct elf_m68k_bfd2got_entry *e1;
1709 const struct elf_m68k_bfd2got_entry *e2;
1710
1711 e1 = (const struct elf_m68k_bfd2got_entry *) entry1;
1712 e2 = (const struct elf_m68k_bfd2got_entry *) entry2;
1713
1714 return e1->bfd == e2->bfd;
1715}
1716
1717/* Destruct a bfd2got entry. */
1718
1719static void
1720elf_m68k_bfd2got_entry_del (void *_entry)
1721{
1722 struct elf_m68k_bfd2got_entry *entry;
1723
1724 entry = (struct elf_m68k_bfd2got_entry *) _entry;
1725
1726 BFD_ASSERT (entry->got != NULL);
1727 elf_m68k_clear_got (entry->got);
1728}
1729
1730/* Find existing or create new (depending on HOWTO) bfd2got entry in
1731 MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where
1732 memory should be allocated. */
1733
1734static struct elf_m68k_bfd2got_entry *
1735elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got,
1736 const bfd *abfd,
1737 enum elf_m68k_get_entry_howto howto,
1738 struct bfd_link_info *info)
1739{
1740 struct elf_m68k_bfd2got_entry entry_;
1741 void **ptr;
1742 struct elf_m68k_bfd2got_entry *entry;
1743
1744 BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1745
1746 if (multi_got->bfd2got == NULL)
1747 /* This is the first GOT. Initialize bfd2got. */
1748 {
1749 if (howto == SEARCH)
1750 return NULL;
1751
1752 multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash,
1753 elf_m68k_bfd2got_entry_eq,
1754 elf_m68k_bfd2got_entry_del);
1755 if (multi_got->bfd2got == NULL)
1756 {
1757 bfd_set_error (bfd_error_no_memory);
1758 return NULL;
1759 }
1760 }
1761
1762 entry_.bfd = abfd;
1763 ptr = htab_find_slot (multi_got->bfd2got, &entry_, (howto != SEARCH
1764 ? INSERT : NO_INSERT));
1765 if (ptr == NULL)
1766 {
1767 if (howto == SEARCH)
1768 /* Entry not found. */
1769 return NULL;
1770
1771 /* We're out of memory. */
1772 bfd_set_error (bfd_error_no_memory);
1773 return NULL;
1774 }
1775
1776 if (*ptr == NULL)
1777 /* Entry was not found. Create new one. */
1778 {
1779 BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1780
1781 entry = ((struct elf_m68k_bfd2got_entry *)
1782 bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)));
1783 if (entry == NULL)
1784 return NULL;
1785
1786 entry->bfd = abfd;
1787
1788 entry->got = elf_m68k_create_empty_got (info);
1789 if (entry->got == NULL)
1790 return NULL;
1791
1792 *ptr = entry;
1793 }
1794 else
1795 {
1796 BFD_ASSERT (howto != MUST_CREATE);
1797
1798 /* Return existing entry. */
1799 entry = *ptr;
1800 }
1801
1802 return entry;
1803}
1804
1805struct elf_m68k_can_merge_gots_arg
1806{
1807 /* A current_got that we constructing a DIFF against. */
1808 struct elf_m68k_got *big;
1809
1810 /* GOT holding entries not present or that should be changed in
1811 BIG. */
1812 struct elf_m68k_got *diff;
1813
1814 /* Context where to allocate memory. */
1815 struct bfd_link_info *info;
1816
1817 /* Error flag. */
1818 bfd_boolean error_p;
1819};
1820
1821/* Process a single entry from the small GOT to see if it should be added
1822 or updated in the big GOT. */
1823
1824static int
1825elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg)
1826{
1827 const struct elf_m68k_got_entry *entry1;
1828 struct elf_m68k_can_merge_gots_arg *arg;
1829 const struct elf_m68k_got_entry *entry2;
cf869cce 1830 enum elf_m68k_reloc_type type;
7fb9f789
NC		 1831
1832 entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr;
1833 arg = (struct elf_m68k_can_merge_gots_arg *) _arg;
1834
1835 entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL);
1836
1837 if (entry2 != NULL)
cf869cce 1838 /* We found an existing entry. Check if we should update it. */
7fb9f789 1839 {
cf869cce
NC		 1840 type = elf_m68k_update_got_entry_type (arg->diff,
1841 entry2->key_.type,
1842 entry1->key_.type);
7fb9f789 1843
cf869cce 1844 if (type == entry2->key_.type)
7fb9f789
NC		 1845 /* ENTRY1 doesn't update data in ENTRY2. Skip it.
1846 To skip creation of difference entry we use the type,
1847 which we won't see in GOT entries for sure. */
cf869cce 1848 type = R_68K_max;
7fb9f789
NC		 1849 }
1850 else
cf869cce 1851 /* We didn't find the entry. Add entry1 to DIFF. */
7fb9f789 1852 {
cf869cce 1853 BFD_ASSERT (entry1->key_.type != R_68K_max);
7fb9f789 1854
cf869cce
NC		 1855 type = elf_m68k_update_got_entry_type (arg->diff,
1856 R_68K_max, entry1->key_.type);
7fb9f789 1857
7fb9f789 1858 if (entry1->key_.bfd != NULL)
cf869cce 1859 arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type);
7fb9f789
NC		 1860 }
1861
cf869cce 1862 if (type != R_68K_max)
7fb9f789
NC		 1863 /* Create an entry in DIFF. */
1864 {
1865 struct elf_m68k_got_entry *entry;
1866
1867 entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE,
1868 arg->info);
1869 if (entry == NULL)
1870 {
1871 arg->error_p = TRUE;
1872 return 0;
1873 }
1874
cf869cce 1875 entry->key_.type = type;
7fb9f789
NC		 1876 }
1877
1878 return 1;
1879}
1880
1881/* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it.
1882 Construct DIFF GOT holding the entries which should be added or updated
1883 in BIG GOT to accumulate information from SMALL.
1884 INFO is the context where memory should be allocated. */
1885
1886static bfd_boolean
1887elf_m68k_can_merge_gots (struct elf_m68k_got *big,
1888 const struct elf_m68k_got *small,
1889 struct bfd_link_info *info,
1890 struct elf_m68k_got *diff)
1891{
1892 struct elf_m68k_can_merge_gots_arg arg_;
1893
1894 BFD_ASSERT (small->offset == (bfd_vma) -1);
1895
1896 arg_.big = big;
1897 arg_.diff = diff;
1898 arg_.info = info;
1899 arg_.error_p = FALSE;
1900 htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_);
1901 if (arg_.error_p)
1902 {
1903 diff->offset = 0;
1904 return FALSE;
1905 }
1906
1907 /* Check for overflow. */
cf869cce
NC		 1908 if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8]
1909 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1910 || (big->n_slots[R_16] + arg_.diff->n_slots[R_16]
1911 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
7fb9f789
NC		 1912 return FALSE;
1913
1914 return TRUE;
1915}
1916
1917struct elf_m68k_merge_gots_arg
1918{
1919 /* The BIG got. */
1920 struct elf_m68k_got *big;
1921
1922 /* Context where memory should be allocated. */
1923 struct bfd_link_info *info;
1924
1925 /* Error flag. */
1926 bfd_boolean error_p;
1927};
1928
1929/* Process a single entry from DIFF got. Add or update corresponding
1930 entry in the BIG got. */
1931
1932static int
1933elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg)
1934{
1935 const struct elf_m68k_got_entry *from;
1936 struct elf_m68k_merge_gots_arg *arg;
1937 struct elf_m68k_got_entry *to;
1938
1939 from = (const struct elf_m68k_got_entry *) *entry_ptr;
1940 arg = (struct elf_m68k_merge_gots_arg *) _arg;
1941
1942 to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE,
1943 arg->info);
1944 if (to == NULL)
1945 {
1946 arg->error_p = TRUE;
1947 return 0;
1948 }
1949
1950 BFD_ASSERT (to->u.s1.refcount == 0);
1951 /* All we need to merge is TYPE. */
cf869cce 1952 to->key_.type = from->key_.type;
7fb9f789
NC		 1953
1954 return 1;
1955}
1956
1957/* Merge data from DIFF to BIG. INFO is context where memory should be
1958 allocated. */
1959
1960static bfd_boolean
1961elf_m68k_merge_gots (struct elf_m68k_got *big,
1962 struct elf_m68k_got *diff,
1963 struct bfd_link_info *info)
1964{
1965 if (diff->entries != NULL)
1966 /* DIFF is not empty. Merge it into BIG GOT. */
1967 {
1968 struct elf_m68k_merge_gots_arg arg_;
1969
1970 /* Merge entries. */
1971 arg_.big = big;
1972 arg_.info = info;
1973 arg_.error_p = FALSE;
1974 htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_);
1975 if (arg_.error_p)
1976 return FALSE;
1977
1978 /* Merge counters. */
cf869cce
NC		 1979 big->n_slots[R_8] += diff->n_slots[R_8];
1980 big->n_slots[R_16] += diff->n_slots[R_16];
1981 big->n_slots[R_32] += diff->n_slots[R_32];
1982 big->local_n_slots += diff->local_n_slots;
7fb9f789
NC		 1983 }
1984 else
1985 /* DIFF is empty. */
1986 {
cf869cce
NC		 1987 BFD_ASSERT (diff->n_slots[R_8] == 0);
1988 BFD_ASSERT (diff->n_slots[R_16] == 0);
1989 BFD_ASSERT (diff->n_slots[R_32] == 0);
1990 BFD_ASSERT (diff->local_n_slots == 0);
7fb9f789
NC		 1991 }
1992
1993 BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p
cf869cce
NC		 1994 || ((big->n_slots[R_8]
1995 <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1996 && (big->n_slots[R_16]
1997 <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))));
7fb9f789
NC		 1998
1999 return TRUE;
2000}
2001
2002struct elf_m68k_finalize_got_offsets_arg
2003{
cf869cce
NC		 2004 /* Ranges of the offsets for GOT entries.
2005 R_x entries receive offsets between offset1[R_x] and offset2[R_x].
2006 R_x is R_8, R_16 and R_32. */
2007 bfd_vma *offset1;
2008 bfd_vma *offset2;
7fb9f789
NC		 2009
2010 /* Mapping from global symndx to global symbols.
2011 This is used to build lists of got entries for global symbols. */
2012 struct elf_m68k_link_hash_entry **symndx2h;
cf869cce
NC		 2013
2014 bfd_vma n_ldm_entries;
7fb9f789
NC		 2015};
2016
2017/* Assign ENTRY an offset. Build list of GOT entries for global symbols
2018 along the way. */
2019
2020static int
2021elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg)
2022{
2023 struct elf_m68k_got_entry *entry;
2024 struct elf_m68k_finalize_got_offsets_arg *arg;
2025
cf869cce
NC		 2026 enum elf_m68k_got_offset_size got_offset_size;
2027 bfd_vma entry_size;
2028
7fb9f789
NC		 2029 entry = (struct elf_m68k_got_entry *) *entry_ptr;
2030 arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg;
2031
2032 /* This should be a fresh entry created in elf_m68k_can_merge_gots. */
2033 BFD_ASSERT (entry->u.s1.refcount == 0);
2034
cf869cce
NC		 2035 /* Get GOT offset size for the entry . */
2036 got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type);
7fb9f789 2037
cf869cce
NC		 2038 /* Calculate entry size in bytes. */
2039 entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type);
7fb9f789 2040
cf869cce
NC		 2041 /* Check if we should switch to negative range of the offsets. */
2042 if (arg->offset1[got_offset_size] + entry_size
2043 > arg->offset2[got_offset_size])
2044 {
2045 /* Verify that this is the only switch to negative range for
2046 got_offset_size. If this assertion fails, then we've miscalculated
2047 range for got_offset_size entries in
2048 elf_m68k_finalize_got_offsets. */
2049 BFD_ASSERT (arg->offset2[got_offset_size]
2050 != arg->offset2[-(int) got_offset_size - 1]);
2051
2052 /* Switch. */
2053 arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1];
2054 arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1];
2055
2056 /* Verify that now we have enough room for the entry. */
2057 BFD_ASSERT (arg->offset1[got_offset_size] + entry_size
2058 <= arg->offset2[got_offset_size]);
7fb9f789
NC		 2059 }
2060
cf869cce
NC		 2061 /* Assign offset to entry. */
2062 entry->u.s2.offset = arg->offset1[got_offset_size];
2063 arg->offset1[got_offset_size] += entry_size;
2064
7fb9f789
NC		 2065 if (entry->key_.bfd == NULL)
2066 /* Hook up this entry into the list of got_entries of H. */
2067 {
2068 struct elf_m68k_link_hash_entry *h;
2069
7fb9f789 2070 h = arg->symndx2h[entry->key_.symndx];
cf869cce
NC		 2071 if (h != NULL)
2072 {
2073 entry->u.s2.next = h->glist;
2074 h->glist = entry;
2075 }
2076 else
2077 /* This should be the entry for TLS_LDM relocation then. */
2078 {
2079 BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type)
2080 == R_68K_TLS_LDM32)
2081 && entry->key_.symndx == 0);
7fb9f789 2082
cf869cce
NC		 2083 ++arg->n_ldm_entries;
2084 }
7fb9f789
NC		 2085 }
2086 else
2087 /* This entry is for local symbol. */
2088 entry->u.s2.next = NULL;
2089
2090 return 1;
2091}
2092
2093/* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we
2094 should use negative offsets.
2095 Build list of GOT entries for global symbols along the way.
2096 SYMNDX2H is mapping from global symbol indices to actual
cf869cce
NC		 2097 global symbols.
2098 Return offset at which next GOT should start. */
7fb9f789
NC		 2099
2100static void
2101elf_m68k_finalize_got_offsets (struct elf_m68k_got *got,
2102 bfd_boolean use_neg_got_offsets_p,
cf869cce
NC		 2103 struct elf_m68k_link_hash_entry **symndx2h,
2104 bfd_vma *final_offset, bfd_vma *n_ldm_entries)
7fb9f789
NC		 2105{
2106 struct elf_m68k_finalize_got_offsets_arg arg_;
cf869cce
NC		 2107 bfd_vma offset1_[2 * R_LAST];
2108 bfd_vma offset2_[2 * R_LAST];
2109 int i;
2110 bfd_vma start_offset;
7fb9f789
NC		 2111
2112 BFD_ASSERT (got->offset != (bfd_vma) -1);
2113
2114 /* We set entry offsets relative to the .got section (and not the
2115 start of a particular GOT), so that we can use them in
cf869cce 2116 finish_dynamic_symbol without needing to know the GOT which they come
7fb9f789
NC		 2117 from. */
2118
cf869cce
NC		 2119 /* Put offset1 in the middle of offset1_, same for offset2. */
2120 arg_.offset1 = offset1_ + R_LAST;
2121 arg_.offset2 = offset2_ + R_LAST;
2122
2123 start_offset = got->offset;
2124
7fb9f789 2125 if (use_neg_got_offsets_p)
cf869cce
NC		 2126 /* Setup both negative and positive ranges for R_8, R_16 and R_32. */
2127 i = -(int) R_32 - 1;
2128 else
2129 /* Setup positives ranges for R_8, R_16 and R_32. */
2130 i = (int) R_8;
2131
2132 for (; i <= (int) R_32; ++i)
7fb9f789 2133 {
cf869cce 2134 int j;
7fb9f789
NC		 2135 size_t n;
2136
cf869cce
NC		 2137 /* Set beginning of the range of offsets I. */
2138 arg_.offset1[i] = start_offset;
7fb9f789 2139
cf869cce
NC		 2140 /* Calculate number of slots that require I offsets. */
2141 j = (i >= 0) ? i : -i - 1;
2142 n = (j >= 1) ? got->n_slots[j - 1] : 0;
2143 n = got->n_slots[j] - n;
7fb9f789 2144
cf869cce
NC		 2145 if (use_neg_got_offsets_p && n != 0)
2146 {
2147 if (i < 0)
2148 /* We first fill the positive side of the range, so we might
2149 end up with one empty slot at that side when we can't fit
2150 whole 2-slot entry. Account for that at negative side of
2151 the interval with one additional entry. */
2152 n = n / 2 + 1;
2153 else
2154 /* When the number of slots is odd, make positive side of the
2155 range one entry bigger. */
2156 n = (n + 1) / 2;
2157 }
2158
2159 /* N is the number of slots that require I offsets.
2160 Calculate length of the range for I offsets. */
2161 n = 4 * n;
7fb9f789 2162
cf869cce
NC		 2163 /* Set end of the range. */
2164 arg_.offset2[i] = start_offset + n;
7fb9f789 2165
cf869cce 2166 start_offset = arg_.offset2[i];
7fb9f789
NC		 2167 }
2168
cf869cce
NC		 2169 if (!use_neg_got_offsets_p)
2170 /* Make sure that if we try to switch to negative offsets in
2171 elf_m68k_finalize_got_offsets_1, the assert therein will catch
2172 the bug. */
2173 for (i = R_8; i <= R_32; ++i)
2174 arg_.offset2[-i - 1] = arg_.offset2[i];
7fb9f789 2175
cf869cce
NC		 2176 /* Setup got->offset. offset1[R_8] is either in the middle or at the
2177 beginning of GOT depending on use_neg_got_offsets_p. */
2178 got->offset = arg_.offset1[R_8];
7fb9f789 2179
cf869cce
NC		 2180 arg_.symndx2h = symndx2h;
2181 arg_.n_ldm_entries = 0;
7fb9f789 2182
cf869cce
NC		 2183 /* Assign offsets. */
2184 htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_);
7fb9f789 2185
cf869cce
NC		 2186 /* Check offset ranges we have actually assigned. */
2187 for (i = (int) R_8; i <= (int) R_32; ++i)
2188 BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4);
7fb9f789 2189
cf869cce
NC		 2190 *final_offset = start_offset;
2191 *n_ldm_entries = arg_.n_ldm_entries;
7fb9f789
NC		 2192}
2193
2194struct elf_m68k_partition_multi_got_arg
2195{
2196 /* The GOT we are adding entries to. Aka big got. */
2197 struct elf_m68k_got *current_got;
2198
2199 /* Offset to assign the next CURRENT_GOT. */
2200 bfd_vma offset;
2201
2202 /* Context where memory should be allocated. */
2203 struct bfd_link_info *info;
2204
cf869cce 2205 /* Total number of slots in the .got section.
7fb9f789 2206 This is used to calculate size of the .got and .rela.got sections. */
cf869cce 2207 bfd_vma n_slots;
7fb9f789 2208
cf869cce
NC		 2209 /* Difference in numbers of allocated slots in the .got section
2210 and necessary relocations in the .rela.got section.
7fb9f789 2211 This is used to calculate size of the .rela.got section. */
cf869cce 2212 bfd_vma slots_relas_diff;
7fb9f789
NC		 2213
2214 /* Error flag. */
2215 bfd_boolean error_p;
2216
2217 /* Mapping from global symndx to global symbols.
2218 This is used to build lists of got entries for global symbols. */
2219 struct elf_m68k_link_hash_entry **symndx2h;
2220};
2221
cf869cce
NC		 2222static void
2223elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg)
2224{
2225 bfd_vma n_ldm_entries;
2226
2227 elf_m68k_finalize_got_offsets (arg->current_got,
2228 (elf_m68k_hash_table (arg->info)
2229 ->use_neg_got_offsets_p),
2230 arg->symndx2h,
2231 &arg->offset, &n_ldm_entries);
2232
2233 arg->n_slots += arg->current_got->n_slots[R_32];
2234
0e1862bb 2235 if (!bfd_link_pic (arg->info))
cf869cce
NC		 2236 /* If we are generating a shared object, we need to
2237 output a R_68K_RELATIVE reloc so that the dynamic
2238 linker can adjust this GOT entry. Overwise we
2239 don't need space in .rela.got for local symbols. */
2240 arg->slots_relas_diff += arg->current_got->local_n_slots;
2241
2242 /* @LDM relocations require a 2-slot GOT entry, but only
2243 one relocation. Account for that. */
2244 arg->slots_relas_diff += n_ldm_entries;
2245
2246 BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots);
2247}
2248
2249
7fb9f789
NC		 2250/* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT
2251 or start a new CURRENT_GOT. */
2252
2253static int
2254elf_m68k_partition_multi_got_1 (void **_entry, void *_arg)
2255{
2256 struct elf_m68k_bfd2got_entry *entry;
2257 struct elf_m68k_partition_multi_got_arg *arg;
2258 struct elf_m68k_got *got;
7fb9f789
NC		 2259 struct elf_m68k_got diff_;
2260 struct elf_m68k_got *diff;
2261
2262 entry = (struct elf_m68k_bfd2got_entry *) *_entry;
2263 arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2264
2265 got = entry->got;
2266 BFD_ASSERT (got != NULL);
2267 BFD_ASSERT (got->offset == (bfd_vma) -1);
2268
2269 diff = NULL;
2270
2271 if (arg->current_got != NULL)
2272 /* Construct diff. */
2273 {
2274 diff = &diff_;
cf869cce 2275 elf_m68k_init_got (diff);
7fb9f789
NC		 2276
2277 if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff))
2278 {
2279 if (diff->offset == 0)
2280 /* Offset set to 0 in the diff_ indicates an error. */
2281 {
2282 arg->error_p = TRUE;
2283 goto final_return;
2284 }
2285
2286 if (elf_m68k_hash_table (arg->info)->allow_multigot_p)
2287 {
2288 elf_m68k_clear_got (diff);
cf869cce 2289 /* Schedule to finish up current_got and start new one. */
7fb9f789
NC		 2290 diff = NULL;
2291 }
2292 /* else
2293 Merge GOTs no matter what. If big GOT overflows,
2294 we'll fail in relocate_section due to truncated relocations.
2295
2296 ??? May be fail earlier? E.g., in can_merge_gots. */
2297 }
2298 }
2299 else
2300 /* Diff of got against empty current_got is got itself. */
2301 {
cf869cce 2302 /* Create empty current_got to put subsequent GOTs to. */
7fb9f789
NC		 2303 arg->current_got = elf_m68k_create_empty_got (arg->info);
2304 if (arg->current_got == NULL)
2305 {
2306 arg->error_p = TRUE;
2307 goto final_return;
2308 }
2309
2310 arg->current_got->offset = arg->offset;
2311
2312 diff = got;
2313 }
2314
7fb9f789
NC		 2315 if (diff != NULL)
2316 {
cf869cce 2317 if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info))
7fb9f789
NC		 2318 {
2319 arg->error_p = TRUE;
2320 goto final_return;
2321 }
2322
2323 /* Now we can free GOT. */
2324 elf_m68k_clear_got (got);
2325
cf869cce 2326 entry->got = arg->current_got;
7fb9f789
NC		 2327 }
2328 else
2329 {
7fb9f789 2330 /* Finish up current_got. */
cf869cce 2331 elf_m68k_partition_multi_got_2 (arg);
7fb9f789 2332
cf869cce
NC		 2333 /* Schedule to start a new current_got. */
2334 arg->current_got = NULL;
7fb9f789
NC		 2335
2336 /* Retry. */
2337 if (!elf_m68k_partition_multi_got_1 (_entry, _arg))
2338 {
2339 BFD_ASSERT (arg->error_p);
2340 goto final_return;
2341 }
2342 }
2343
2344 final_return:
2345 if (diff != NULL)
2346 elf_m68k_clear_got (diff);
2347
2348 return arg->error_p == FALSE ? 1 : 0;
2349}
2350
2351/* Helper function to build symndx2h mapping. */
2352
2353static bfd_boolean
2354elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h,
2355 void *_arg)
2356{
2357 struct elf_m68k_link_hash_entry *h;
2358
2359 h = elf_m68k_hash_entry (_h);
2360
2361 if (h->got_entry_key != 0)
2362 /* H has at least one entry in the GOT. */
2363 {
2364 struct elf_m68k_partition_multi_got_arg *arg;
2365
2366 arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2367
2368 BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL);
2369 arg->symndx2h[h->got_entry_key] = h;
2370 }
2371
2372 return TRUE;
2373}
2374
2375/* Merge GOTs of some BFDs, assign offsets to GOT entries and build
2376 lists of GOT entries for global symbols.
2377 Calculate sizes of .got and .rela.got sections. */
2378
2379static bfd_boolean
2380elf_m68k_partition_multi_got (struct bfd_link_info *info)
2381{
2382 struct elf_m68k_multi_got *multi_got;
2383 struct elf_m68k_partition_multi_got_arg arg_;
2384
2385 multi_got = elf_m68k_multi_got (info);
2386
2387 arg_.current_got = NULL;
2388 arg_.offset = 0;
2389 arg_.info = info;
cf869cce
NC		 2390 arg_.n_slots = 0;
2391 arg_.slots_relas_diff = 0;
7fb9f789
NC		 2392 arg_.error_p = FALSE;
2393
2394 if (multi_got->bfd2got != NULL)
2395 {
2396 /* Initialize symndx2h mapping. */
2397 {
2398 arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx
2399 * sizeof (*arg_.symndx2h));
2400 if (arg_.symndx2h == NULL)
2401 return FALSE;
2402
2403 elf_link_hash_traverse (elf_hash_table (info),
2404 elf_m68k_init_symndx2h_1, &arg_);
2405 }
2406
2407 /* Partition. */
2408 htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1,
2409 &arg_);
2410 if (arg_.error_p)
2411 {
2412 free (arg_.symndx2h);
2413 arg_.symndx2h = NULL;
2414
2415 return FALSE;
2416 }
2417
2418 /* Finish up last current_got. */
cf869cce 2419 elf_m68k_partition_multi_got_2 (&arg_);
7fb9f789
NC		 2420
2421 free (arg_.symndx2h);
266abb8f 2422 }
7fb9f789
NC		 2423
2424 if (elf_hash_table (info)->dynobj != NULL)
2425 /* Set sizes of .got and .rela.got sections. */
266abb8f 2426 {
7fb9f789 2427 asection *s;
425c6cb0 2428
3d4d4302 2429 s = bfd_get_linker_section (elf_hash_table (info)->dynobj, ".got");
7fb9f789 2430 if (s != NULL)
cf869cce 2431 s->size = arg_.offset;
425c6cb0 2432 else
cf869cce 2433 BFD_ASSERT (arg_.offset == 0);
425c6cb0 2434
cf869cce
NC		 2435 BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots);
2436 arg_.n_slots -= arg_.slots_relas_diff;
7fb9f789 2437
3d4d4302 2438 s = bfd_get_linker_section (elf_hash_table (info)->dynobj, ".rela.got");
7fb9f789 2439 if (s != NULL)
cf869cce 2440 s->size = arg_.n_slots * sizeof (Elf32_External_Rela);
3bdcfdf4 2441 else
cf869cce 2442 BFD_ASSERT (arg_.n_slots == 0);
9e1281c7 2443 }
7fb9f789
NC		 2444 else
2445 BFD_ASSERT (multi_got->bfd2got == NULL);
9e1281c7 2446
b34976b6 2447 return TRUE;
9e1281c7
CM		 2448}
2449
7fb9f789
NC		 2450/* Specialized version of elf_m68k_get_got_entry that returns pointer
2451 to hashtable slot, thus allowing removal of entry via
2452 elf_m68k_remove_got_entry. */
2453
2454static struct elf_m68k_got_entry **
2455elf_m68k_find_got_entry_ptr (struct elf_m68k_got *got,
2456 struct elf_m68k_got_entry_key *key)
9e1281c7 2457{
7fb9f789
NC		 2458 void **ptr;
2459 struct elf_m68k_got_entry entry_;
2460 struct elf_m68k_got_entry **entry_ptr;
9e1281c7 2461
7fb9f789
NC		 2462 entry_.key_ = *key;
2463 ptr = htab_find_slot (got->entries, &entry_, NO_INSERT);
2464 BFD_ASSERT (ptr != NULL);
9e1281c7 2465
7fb9f789 2466 entry_ptr = (struct elf_m68k_got_entry **) ptr;
9e1281c7 2467
7fb9f789
NC		 2468 return entry_ptr;
2469}
9e1281c7 2470
7fb9f789 2471/* Remove entry pointed to by ENTRY_PTR from GOT. */
9e1281c7 2472
7fb9f789
NC		 2473static void
2474elf_m68k_remove_got_entry (struct elf_m68k_got *got,
2475 struct elf_m68k_got_entry **entry_ptr)
2476{
2477 struct elf_m68k_got_entry *entry;
2478
2479 entry = *entry_ptr;
2480
2481 /* Check that offsets have not been finalized yet. */
2482 BFD_ASSERT (got->offset == (bfd_vma) -1);
2483 /* Check that this entry is indeed unused. */
2484 BFD_ASSERT (entry->u.s1.refcount == 0);
2485
cf869cce 2486 elf_m68k_remove_got_entry_type (got, entry->key_.type);
7fb9f789
NC		 2487
2488 if (entry->key_.bfd != NULL)
cf869cce
NC		 2489 got->local_n_slots -= elf_m68k_reloc_got_n_slots (entry->key_.type);
2490
2491 BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
7fb9f789
NC		 2492
2493 htab_clear_slot (got->entries, (void **) entry_ptr);
2494}
2495
2496/* Copy any information related to dynamic linking from a pre-existing
2497 symbol to a newly created symbol. Also called to copy flags and
2498 other back-end info to a weakdef, in which case the symbol is not
2499 newly created and plt/got refcounts and dynamic indices should not
2500 be copied. */
2501
2502static void
2503elf_m68k_copy_indirect_symbol (struct bfd_link_info *info,
2504 struct elf_link_hash_entry *_dir,
2505 struct elf_link_hash_entry *_ind)
2506{
2507 struct elf_m68k_link_hash_entry *dir;
2508 struct elf_m68k_link_hash_entry *ind;
2509
2510 _bfd_elf_link_hash_copy_indirect (info, _dir, _ind);
2511
2512 if (_ind->root.type != bfd_link_hash_indirect)
2513 return;
2514
2515 dir = elf_m68k_hash_entry (_dir);
2516 ind = elf_m68k_hash_entry (_ind);
2517
e5f2b1de
NC		 2518 /* Any absolute non-dynamic relocations against an indirect or weak
2519 definition will be against the target symbol. */
2520 _dir->non_got_ref |= _ind->non_got_ref;
2521
7fb9f789
NC		 2522 /* We might have a direct symbol already having entries in the GOTs.
2523 Update its key only in case indirect symbol has GOT entries and
2524 assert that both indirect and direct symbols don't have GOT entries
2525 at the same time. */
2526 if (ind->got_entry_key != 0)
266abb8f 2527 {
7fb9f789
NC		 2528 BFD_ASSERT (dir->got_entry_key == 0);
2529 /* Assert that GOTs aren't partioned yet. */
2530 BFD_ASSERT (ind->glist == NULL);
425c6cb0 2531
7fb9f789
NC		 2532 dir->got_entry_key = ind->got_entry_key;
2533 ind->got_entry_key = 0;
266abb8f 2534 }
9e1281c7 2535}
7fb9f789 2536
252b5132
RH		 2537/* Look through the relocs for a section during the first phase, and
2538 allocate space in the global offset table or procedure linkage
2539 table. */
2540
b34976b6 2541static bfd_boolean
2c3fc389
NC		 2542elf_m68k_check_relocs (bfd *abfd,
2543 struct bfd_link_info *info,
2544 asection *sec,
2545 const Elf_Internal_Rela *relocs)
252b5132
RH		 2546{
2547 bfd *dynobj;
2548 Elf_Internal_Shdr *symtab_hdr;
2549 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 2550 const Elf_Internal_Rela *rel;
2551 const Elf_Internal_Rela *rel_end;
2552 asection *sgot;
2553 asection *srelgot;
2554 asection *sreloc;
7fb9f789 2555 struct elf_m68k_got *got;
252b5132 2556
0e1862bb 2557 if (bfd_link_relocatable (info))
b34976b6 2558 return TRUE;
252b5132
RH		 2559
2560 dynobj = elf_hash_table (info)->dynobj;
2561 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2562 sym_hashes = elf_sym_hashes (abfd);
252b5132
RH		 2563
2564 sgot = NULL;
2565 srelgot = NULL;
2566 sreloc = NULL;
2567
7fb9f789
NC		 2568 got = NULL;
2569
252b5132
RH		 2570 rel_end = relocs + sec->reloc_count;
2571 for (rel = relocs; rel < rel_end; rel++)
2572 {
2573 unsigned long r_symndx;
2574 struct elf_link_hash_entry *h;
2575
2576 r_symndx = ELF32_R_SYM (rel->r_info);
2577
2578 if (r_symndx < symtab_hdr->sh_info)
2579 h = NULL;
2580 else
973a3492
L		 2581 {
2582 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2583 while (h->root.type == bfd_link_hash_indirect
2584 || h->root.type == bfd_link_hash_warning)
2585 h = (struct elf_link_hash_entry *) h->root.u.i.link;
81fbe831
AM		 2586
2587 /* PR15323, ref flags aren't set for references in the same
2588 object. */
2589 h->root.non_ir_ref = 1;
973a3492 2590 }
252b5132
RH		 2591
2592 switch (ELF32_R_TYPE (rel->r_info))
2593 {
2594 case R_68K_GOT8:
2595 case R_68K_GOT16:
2596 case R_68K_GOT32:
2597 if (h != NULL
2598 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2599 break;
2600 /* Fall through. */
cf869cce
NC		 2601
2602 /* Relative GOT relocations. */
252b5132
RH		 2603 case R_68K_GOT8O:
2604 case R_68K_GOT16O:
2605 case R_68K_GOT32O:
cf869cce
NC		 2606 /* Fall through. */
2607
2608 /* TLS relocations. */
2609 case R_68K_TLS_GD8:
2610 case R_68K_TLS_GD16:
2611 case R_68K_TLS_GD32:
2612 case R_68K_TLS_LDM8:
2613 case R_68K_TLS_LDM16:
2614 case R_68K_TLS_LDM32:
2615 case R_68K_TLS_IE8:
2616 case R_68K_TLS_IE16:
2617 case R_68K_TLS_IE32:
2618
e5f2b1de
NC		 2619 case R_68K_TLS_TPREL32:
2620 case R_68K_TLS_DTPREL32:
2621
2622 if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32
0e1862bb 2623 && bfd_link_pic (info))
e5f2b1de
NC		 2624 /* Do the special chorus for libraries with static TLS. */
2625 info->flags |= DF_STATIC_TLS;
2626
252b5132
RH		 2627 /* This symbol requires a global offset table entry. */
2628
2629 if (dynobj == NULL)
2630 {
2631 /* Create the .got section. */
2632 elf_hash_table (info)->dynobj = dynobj = abfd;
2633 if (!_bfd_elf_create_got_section (dynobj, info))
b34976b6 2634 return FALSE;
252b5132
RH		 2635 }
2636
2637 if (sgot == NULL)
2638 {
3d4d4302 2639 sgot = bfd_get_linker_section (dynobj, ".got");
252b5132
RH		 2640 BFD_ASSERT (sgot != NULL);
2641 }
2642
2643 if (srelgot == NULL
0e1862bb 2644 && (h != NULL || bfd_link_pic (info)))
252b5132 2645 {
3d4d4302 2646 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
252b5132
RH		 2647 if (srelgot == NULL)
2648 {
3d4d4302
AM		 2649 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2650 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2651 | SEC_READONLY);
2652 srelgot = bfd_make_section_anyway_with_flags (dynobj,
2653 ".rela.got",
2654 flags);
252b5132 2655 if (srelgot == NULL
252b5132 2656 || !bfd_set_section_alignment (dynobj, srelgot, 2))
b34976b6 2657 return FALSE;
252b5132
RH		 2658 }
2659 }
2660
7fb9f789 2661 if (got == NULL)
252b5132 2662 {
7fb9f789 2663 struct elf_m68k_bfd2got_entry *bfd2got_entry;
252b5132 2664
7fb9f789
NC		 2665 bfd2got_entry
2666 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2667 abfd, FIND_OR_CREATE, info);
2668 if (bfd2got_entry == NULL)
2669 return FALSE;
252b5132 2670
7fb9f789
NC		 2671 got = bfd2got_entry->got;
2672 BFD_ASSERT (got != NULL);
252b5132 2673 }
7fb9f789
NC		 2674
2675 {
2676 struct elf_m68k_got_entry *got_entry;
2677
2678 /* Add entry to got. */
2679 got_entry = elf_m68k_add_entry_to_got (got, h, abfd,
2680 ELF32_R_TYPE (rel->r_info),
2681 r_symndx, info);
2682 if (got_entry == NULL)
2683 return FALSE;
2684
2685 if (got_entry->u.s1.refcount == 1)
2686 {
2687 /* Make sure this symbol is output as a dynamic symbol. */
2688 if (h != NULL
2689 && h->dynindx == -1
2690 && !h->forced_local)
2691 {
2692 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2693 return FALSE;
2694 }
7fb9f789
NC		 2695 }
2696 }
2697
252b5132
RH		 2698 break;
2699
2700 case R_68K_PLT8:
2701 case R_68K_PLT16:
2702 case R_68K_PLT32:
2703 /* This symbol requires a procedure linkage table entry. We
2704 actually build the entry in adjust_dynamic_symbol,
2705 because this might be a case of linking PIC code which is
2706 never referenced by a dynamic object, in which case we
2707 don't need to generate a procedure linkage table entry
2708 after all. */
2709
2710 /* If this is a local symbol, we resolve it directly without
2711 creating a procedure linkage table entry. */
2712 if (h == NULL)
2713 continue;
2714
f5385ebf 2715 h->needs_plt = 1;
51b64d56 2716 h->plt.refcount++;
252b5132
RH		 2717 break;
2718
2719 case R_68K_PLT8O:
2720 case R_68K_PLT16O:
2721 case R_68K_PLT32O:
2722 /* This symbol requires a procedure linkage table entry. */
2723
2724 if (h == NULL)
2725 {
2726 /* It does not make sense to have this relocation for a
2727 local symbol. FIXME: does it? How to handle it if
2728 it does make sense? */
2729 bfd_set_error (bfd_error_bad_value);
b34976b6 2730 return FALSE;
252b5132
RH		 2731 }
2732
2733 /* Make sure this symbol is output as a dynamic symbol. */
b6152c34 2734 if (h->dynindx == -1
f5385ebf 2735 && !h->forced_local)
252b5132 2736 {
c152c796 2737 if (!bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2738 return FALSE;
252b5132
RH		 2739 }
2740
f5385ebf 2741 h->needs_plt = 1;
51b64d56 2742 h->plt.refcount++;
252b5132
RH		 2743 break;
2744
2745 case R_68K_PC8:
2746 case R_68K_PC16:
2747 case R_68K_PC32:
2748 /* If we are creating a shared library and this is not a local
2749 symbol, we need to copy the reloc into the shared library.
2750 However when linking with -Bsymbolic and this is a global
2751 symbol which is defined in an object we are including in the
2752 link (i.e., DEF_REGULAR is set), then we can resolve the
2753 reloc directly. At this point we have not seen all the input
2754 files, so it is possible that DEF_REGULAR is not set now but
2755 will be set later (it is never cleared). We account for that
2756 possibility below by storing information in the
2757 pcrel_relocs_copied field of the hash table entry. */
0e1862bb 2758 if (!(bfd_link_pic (info)
252b5132
RH		 2759 && (sec->flags & SEC_ALLOC) != 0
2760 && h != NULL
a496fbc8 2761 && (!SYMBOLIC_BIND (info, h)
b6152c34 2762 || h->root.type == bfd_link_hash_defweak
f5385ebf 2763 || !h->def_regular)))
252b5132
RH		 2764 {
2765 if (h != NULL)
2766 {
2767 /* Make sure a plt entry is created for this symbol if
2768 it turns out to be a function defined by a dynamic
2769 object. */
51b64d56 2770 h->plt.refcount++;
252b5132
RH		 2771 }
2772 break;
2773 }
2774 /* Fall through. */
2775 case R_68K_8:
2776 case R_68K_16:
2777 case R_68K_32:
810e6986
NC		 2778 /* We don't need to handle relocs into sections not going into
2779 the "real" output. */
2780 if ((sec->flags & SEC_ALLOC) == 0)
2781 break;
2782
252b5132
RH		 2783 if (h != NULL)
2784 {
2785 /* Make sure a plt entry is created for this symbol if it
2786 turns out to be a function defined by a dynamic object. */
51b64d56 2787 h->plt.refcount++;
e5f2b1de 2788
0e1862bb 2789 if (bfd_link_executable (info))
e5f2b1de
NC		 2790 /* This symbol needs a non-GOT reference. */
2791 h->non_got_ref = 1;
252b5132
RH		 2792 }
2793
2794 /* If we are creating a shared library, we need to copy the
2795 reloc into the shared library. */
0e1862bb 2796 if (bfd_link_pic (info))
252b5132
RH		 2797 {
2798 /* When creating a shared object, we must copy these
2799 reloc types into the output file. We create a reloc
2800 section in dynobj and make room for this reloc. */
2801 if (sreloc == NULL)
2802 {
83bac4b0
NC		 2803 sreloc = _bfd_elf_make_dynamic_reloc_section
2804 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
252b5132 2805
252b5132 2806 if (sreloc == NULL)
83bac4b0 2807 return FALSE;
252b5132
RH		 2808 }
2809
3e829b4a
AS		 2810 if (sec->flags & SEC_READONLY
2811 /* Don't set DF_TEXTREL yet for PC relative
2812 relocations, they might be discarded later. */
2813 && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2814 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2815 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32))
2816 info->flags |= DF_TEXTREL;
2817
eea6121a 2818 sreloc->size += sizeof (Elf32_External_Rela);
252b5132 2819
b6152c34
AS		 2820 /* We count the number of PC relative relocations we have
2821 entered for this symbol, so that we can discard them
2822 again if, in the -Bsymbolic case, the symbol is later
2823 defined by a regular object, or, in the normal shared
2824 case, the symbol is forced to be local. Note that this
2825 function is only called if we are using an m68kelf linker
2826 hash table, which means that h is really a pointer to an
252b5132 2827 elf_m68k_link_hash_entry. */
b6152c34
AS		 2828 if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2829 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2830 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
252b5132 2831 {
252b5132 2832 struct elf_m68k_pcrel_relocs_copied *p;
b6152c34
AS		 2833 struct elf_m68k_pcrel_relocs_copied **head;
2834
2835 if (h != NULL)
2836 {
2837 struct elf_m68k_link_hash_entry *eh
0cca5f05 2838 = elf_m68k_hash_entry (h);
b6152c34
AS		 2839 head = &eh->pcrel_relocs_copied;
2840 }
2841 else
2842 {
2843 asection *s;
6edfbbad 2844 void *vpp;
87d72d41 2845 Elf_Internal_Sym *isym;
6edfbbad 2846
87d72d41
AM		 2847 isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->sym_cache,
2848 abfd, r_symndx);
2849 if (isym == NULL)
b6152c34 2850 return FALSE;
252b5132 2851
87d72d41
AM		 2852 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2853 if (s == NULL)
2854 s = sec;
2855
6edfbbad
DJ		 2856 vpp = &elf_section_data (s)->local_dynrel;
2857 head = (struct elf_m68k_pcrel_relocs_copied **) vpp;
b6152c34 2858 }
252b5132 2859
b6152c34 2860 for (p = *head; p != NULL; p = p->next)
252b5132
RH		 2861 if (p->section == sreloc)
2862 break;
2863
2864 if (p == NULL)
2865 {
2866 p = ((struct elf_m68k_pcrel_relocs_copied *)
dc810e39 2867 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
252b5132 2868 if (p == NULL)
b34976b6 2869 return FALSE;
b6152c34
AS		 2870 p->next = *head;
2871 *head = p;
252b5132
RH		 2872 p->section = sreloc;
2873 p->count = 0;
2874 }
2875
2876 ++p->count;
2877 }
2878 }
2879
2880 break;
2881
2882 /* This relocation describes the C++ object vtable hierarchy.
2883 Reconstruct it for later use during GC. */
2884 case R_68K_GNU_VTINHERIT:
c152c796 2885 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 2886 return FALSE;
252b5132
RH		 2887 break;
2888
2889 /* This relocation describes which C++ vtable entries are actually
2890 used. Record for later use during GC. */
2891 case R_68K_GNU_VTENTRY:
d17e0c6e
JB		 2892 BFD_ASSERT (h != NULL);
2893 if (h != NULL
2894 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 2895 return FALSE;
252b5132
RH		 2896 break;
2897
2898 default:
2899 break;
2900 }
2901 }
2902
b34976b6 2903 return TRUE;
252b5132
RH		 2904}
2905
2906/* Return the section that should be marked against GC for a given
2907 relocation. */
2908
2909static asection *
07adf181
AM		 2910elf_m68k_gc_mark_hook (asection *sec,
2911 struct bfd_link_info *info,
2912 Elf_Internal_Rela *rel,
2913 struct elf_link_hash_entry *h,
2914 Elf_Internal_Sym *sym)
252b5132
RH		 2915{
2916 if (h != NULL)
07adf181
AM		 2917 switch (ELF32_R_TYPE (rel->r_info))
2918 {
2919 case R_68K_GNU_VTINHERIT:
2920 case R_68K_GNU_VTENTRY:
2921 return NULL;
2922 }
2923
2924 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 2925}
2926
2927/* Update the got entry reference counts for the section being removed. */
2928
b34976b6 2929static bfd_boolean
07adf181
AM		 2930elf_m68k_gc_sweep_hook (bfd *abfd,
2931 struct bfd_link_info *info,
2932 asection *sec,
2933 const Elf_Internal_Rela *relocs)
252b5132
RH		 2934{
2935 Elf_Internal_Shdr *symtab_hdr;
2936 struct elf_link_hash_entry **sym_hashes;
252b5132 2937 const Elf_Internal_Rela *rel, *relend;
252b5132 2938 bfd *dynobj;
7fb9f789 2939 struct elf_m68k_got *got;
252b5132 2940
0e1862bb 2941 if (bfd_link_relocatable (info))
7dda2462
TG		 2942 return TRUE;
2943
252b5132 2944 dynobj = elf_hash_table (info)->dynobj;
dd5724d5 2945 if (dynobj == NULL)
b34976b6 2946 return TRUE;
dd5724d5 2947
4f075348
KH		 2948 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2949 sym_hashes = elf_sym_hashes (abfd);
7fb9f789 2950 got = NULL;
252b5132
RH		 2951
2952 relend = relocs + sec->reloc_count;
2953 for (rel = relocs; rel < relend; rel++)
2954 {
4f075348 2955 unsigned long r_symndx;
3eb128b2
AM		 2956 struct elf_link_hash_entry *h = NULL;
2957
2958 r_symndx = ELF32_R_SYM (rel->r_info);
2959 if (r_symndx >= symtab_hdr->sh_info)
2960 {
2961 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2962 while (h->root.type == bfd_link_hash_indirect
2963 || h->root.type == bfd_link_hash_warning)
2964 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2965 }
4f075348 2966
252b5132
RH		 2967 switch (ELF32_R_TYPE (rel->r_info))
2968 {
2969 case R_68K_GOT8:
2970 case R_68K_GOT16:
2971 case R_68K_GOT32:
7fb9f789
NC		 2972 if (h != NULL
2973 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2974 break;
2975
2976 /* FALLTHRU */
252b5132
RH		 2977 case R_68K_GOT8O:
2978 case R_68K_GOT16O:
2979 case R_68K_GOT32O:
cf869cce
NC		 2980 /* Fall through. */
2981
2982 /* TLS relocations. */
2983 case R_68K_TLS_GD8:
2984 case R_68K_TLS_GD16:
2985 case R_68K_TLS_GD32:
2986 case R_68K_TLS_LDM8:
2987 case R_68K_TLS_LDM16:
2988 case R_68K_TLS_LDM32:
2989 case R_68K_TLS_IE8:
2990 case R_68K_TLS_IE16:
2991 case R_68K_TLS_IE32:
2992
e5f2b1de
NC		 2993 case R_68K_TLS_TPREL32:
2994 case R_68K_TLS_DTPREL32:
2995
7fb9f789 2996 if (got == NULL)
252b5132 2997 {
7fb9f789
NC		 2998 got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2999 abfd, MUST_FIND, NULL)->got;
3000 BFD_ASSERT (got != NULL);
252b5132 3001 }
7fb9f789
NC		 3002
3003 {
3004 struct elf_m68k_got_entry_key key_;
3005 struct elf_m68k_got_entry **got_entry_ptr;
3006 struct elf_m68k_got_entry *got_entry;
3007
cf869cce
NC		 3008 elf_m68k_init_got_entry_key (&key_, h, abfd, r_symndx,
3009 ELF32_R_TYPE (rel->r_info));
7fb9f789
NC		 3010 got_entry_ptr = elf_m68k_find_got_entry_ptr (got, &key_);
3011
3012 got_entry = *got_entry_ptr;
3013
3014 if (got_entry->u.s1.refcount > 0)
3015 {
3016 --got_entry->u.s1.refcount;
3017
3018 if (got_entry->u.s1.refcount == 0)
3019 /* We don't need the .got entry any more. */
3020 elf_m68k_remove_got_entry (got, got_entry_ptr);
3021 }
3022 }
252b5132
RH		 3023 break;
3024
3025 case R_68K_PLT8:
3026 case R_68K_PLT16:
3027 case R_68K_PLT32:
3028 case R_68K_PLT8O:
3029 case R_68K_PLT16O:
3030 case R_68K_PLT32O:
3031 case R_68K_PC8:
3032 case R_68K_PC16:
3033 case R_68K_PC32:
3034 case R_68K_8:
3035 case R_68K_16:
3036 case R_68K_32:
3eb128b2 3037 if (h != NULL)
252b5132 3038 {
252b5132
RH		 3039 if (h->plt.refcount > 0)
3040 --h->plt.refcount;
3041 }
3042 break;
3043
3044 default:
3045 break;
3046 }
3047 }
3048
b34976b6 3049 return TRUE;
252b5132 3050}
cc3e26be
RS		 3051\f
3052/* Return the type of PLT associated with OUTPUT_BFD. */
3053
3054static const struct elf_m68k_plt_info *
3055elf_m68k_get_plt_info (bfd *output_bfd)
3056{
3057 unsigned int features;
3058
3059 features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd));
3060 if (features & cpu32)
3061 return &elf_cpu32_plt_info;
3062 if (features & mcfisa_b)
3063 return &elf_isab_plt_info;
9a2e615a
NS		 3064 if (features & mcfisa_c)
3065 return &elf_isac_plt_info;
cc3e26be
RS		 3066 return &elf_m68k_plt_info;
3067}
3068
3069/* This function is called after all the input files have been read,
3070 and the input sections have been assigned to output sections.
3071 It's a convenient place to determine the PLT style. */
3072
3073static bfd_boolean
3074elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
3075{
7fb9f789
NC		 3076 /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got
3077 sections. */
3078 if (!elf_m68k_partition_multi_got (info))
3079 return FALSE;
3080
cc3e26be
RS		 3081 elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd);
3082 return TRUE;
3083}
252b5132 3084
252b5132
RH		 3085/* Adjust a symbol defined by a dynamic object and referenced by a
3086 regular object. The current definition is in some section of the
3087 dynamic object, but we're not including those sections. We have to
3088 change the definition to something the rest of the link can
3089 understand. */
3090
b34976b6 3091static bfd_boolean
2c3fc389
NC		 3092elf_m68k_adjust_dynamic_symbol (struct bfd_link_info *info,
3093 struct elf_link_hash_entry *h)
252b5132 3094{
cc3e26be 3095 struct elf_m68k_link_hash_table *htab;
252b5132
RH		 3096 bfd *dynobj;
3097 asection *s;
252b5132 3098
cc3e26be 3099 htab = elf_m68k_hash_table (info);
252b5132
RH		 3100 dynobj = elf_hash_table (info)->dynobj;
3101
3102 /* Make sure we know what is going on here. */
3103 BFD_ASSERT (dynobj != NULL
f5385ebf 3104 && (h->needs_plt
f6e332e6 3105 || h->u.weakdef != NULL
f5385ebf
AM		 3106 || (h->def_dynamic
3107 && h->ref_regular
3108 && !h->def_regular)));
252b5132
RH		 3109
3110 /* If this is a function, put it in the procedure linkage table. We
3111 will fill in the contents of the procedure linkage table later,
3112 when we know the address of the .got section. */
3113 if (h->type == STT_FUNC
f5385ebf 3114 || h->needs_plt)
252b5132 3115 {
9dfe8738
AS		 3116 if ((h->plt.refcount <= 0
3117 || SYMBOL_CALLS_LOCAL (info, h)
3118 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3119 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 3120 /* We must always create the plt entry if it was referenced
3121 by a PLTxxO relocation. In this case we already recorded
3122 it as a dynamic symbol. */
3123 && h->dynindx == -1)
3124 {
3125 /* This case can occur if we saw a PLTxx reloc in an input
3126 file, but the symbol was never referred to by a dynamic
9dfe8738
AS		 3127 object, or if all references were garbage collected. In
3128 such a case, we don't actually need to build a procedure
3129 linkage table, and we can just do a PCxx reloc instead. */
252b5132 3130 h->plt.offset = (bfd_vma) -1;
f5385ebf 3131 h->needs_plt = 0;
b34976b6 3132 return TRUE;
252b5132
RH		 3133 }
3134
3135 /* Make sure this symbol is output as a dynamic symbol. */
b6152c34 3136 if (h->dynindx == -1
f5385ebf 3137 && !h->forced_local)
252b5132 3138 {
c152c796 3139 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 3140 return FALSE;
252b5132
RH		 3141 }
3142
3d4d4302 3143 s = bfd_get_linker_section (dynobj, ".plt");
252b5132
RH		 3144 BFD_ASSERT (s != NULL);
3145
3146 /* If this is the first .plt entry, make room for the special
3147 first entry. */
eea6121a 3148 if (s->size == 0)
cc3e26be 3149 s->size = htab->plt_info->size;
252b5132
RH		 3150
3151 /* If this symbol is not defined in a regular file, and we are
3152 not generating a shared library, then set the symbol to this
3153 location in the .plt. This is required to make function
3154 pointers compare as equal between the normal executable and
3155 the shared library. */
0e1862bb 3156 if (!bfd_link_pic (info)
f5385ebf 3157 && !h->def_regular)
252b5132
RH		 3158 {
3159 h->root.u.def.section = s;
eea6121a 3160 h->root.u.def.value = s->size;
252b5132
RH		 3161 }
3162
eea6121a 3163 h->plt.offset = s->size;
252b5132
RH		 3164
3165 /* Make room for this entry. */
cc3e26be 3166 s->size += htab->plt_info->size;
252b5132
RH		 3167
3168 /* We also need to make an entry in the .got.plt section, which
3169 will be placed in the .got section by the linker script. */
3d4d4302 3170 s = bfd_get_linker_section (dynobj, ".got.plt");
252b5132 3171 BFD_ASSERT (s != NULL);
eea6121a 3172 s->size += 4;
252b5132
RH		 3173
3174 /* We also need to make an entry in the .rela.plt section. */
3d4d4302 3175 s = bfd_get_linker_section (dynobj, ".rela.plt");
252b5132 3176 BFD_ASSERT (s != NULL);
eea6121a 3177 s->size += sizeof (Elf32_External_Rela);
252b5132 3178
b34976b6 3179 return TRUE;
252b5132
RH		 3180 }
3181
3182 /* Reinitialize the plt offset now that it is not used as a reference
3183 count any more. */
3184 h->plt.offset = (bfd_vma) -1;
3185
3186 /* If this is a weak symbol, and there is a real definition, the
3187 processor independent code will have arranged for us to see the
3188 real definition first, and we can just use the same value. */
f6e332e6 3189 if (h->u.weakdef != NULL)
252b5132 3190 {
f6e332e6
AM		 3191 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3192 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3193 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3194 h->root.u.def.value = h->u.weakdef->root.u.def.value;
b34976b6 3195 return TRUE;
252b5132
RH		 3196 }
3197
3198 /* This is a reference to a symbol defined by a dynamic object which
3199 is not a function. */
3200
3201 /* If we are creating a shared library, we must presume that the
3202 only references to the symbol are via the global offset table.
3203 For such cases we need not do anything here; the relocations will
3204 be handled correctly by relocate_section. */
0e1862bb 3205 if (bfd_link_pic (info))
b34976b6 3206 return TRUE;
252b5132 3207
e5f2b1de
NC		 3208 /* If there are no references to this symbol that do not use the
3209 GOT, we don't need to generate a copy reloc. */
3210 if (!h->non_got_ref)
3211 return TRUE;
3212
252b5132
RH		 3213 /* We must allocate the symbol in our .dynbss section, which will
3214 become part of the .bss section of the executable. There will be
3215 an entry for this symbol in the .dynsym section. The dynamic
3216 object will contain position independent code, so all references
3217 from the dynamic object to this symbol will go through the global
3218 offset table. The dynamic linker will use the .dynsym entry to
3219 determine the address it must put in the global offset table, so
3220 both the dynamic object and the regular object will refer to the
3221 same memory location for the variable. */
3222
3d4d4302 3223 s = bfd_get_linker_section (dynobj, ".dynbss");
252b5132
RH		 3224 BFD_ASSERT (s != NULL);
3225
3226 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
3227 copy the initial value out of the dynamic object and into the
3228 runtime process image. We need to remember the offset into the
3229 .rela.bss section we are going to use. */
1d7e9d18 3230 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
252b5132
RH		 3231 {
3232 asection *srel;
3233
3d4d4302 3234 srel = bfd_get_linker_section (dynobj, ".rela.bss");
252b5132 3235 BFD_ASSERT (srel != NULL);
eea6121a 3236 srel->size += sizeof (Elf32_External_Rela);
f5385ebf 3237 h->needs_copy = 1;
252b5132
RH		 3238 }
3239
6cabe1ea 3240 return _bfd_elf_adjust_dynamic_copy (info, h, s);
252b5132
RH		 3241}
3242
3243/* Set the sizes of the dynamic sections. */
3244
b34976b6 3245static bfd_boolean
2c3fc389
NC		 3246elf_m68k_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3247 struct bfd_link_info *info)
252b5132
RH		 3248{
3249 bfd *dynobj;
3250 asection *s;
b34976b6
AM		 3251 bfd_boolean plt;
3252 bfd_boolean relocs;
252b5132
RH		 3253
3254 dynobj = elf_hash_table (info)->dynobj;
3255 BFD_ASSERT (dynobj != NULL);
3256
3257 if (elf_hash_table (info)->dynamic_sections_created)
3258 {
3259 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 3260 if (bfd_link_executable (info) && !info->nointerp)
252b5132 3261 {
3d4d4302 3262 s = bfd_get_linker_section (dynobj, ".interp");
252b5132 3263 BFD_ASSERT (s != NULL);
eea6121a 3264 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 3265 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3266 }
3267 }
3268 else
3269 {
3270 /* We may have created entries in the .rela.got section.
3271 However, if we are not creating the dynamic sections, we will
3272 not actually use these entries. Reset the size of .rela.got,
3273 which will cause it to get stripped from the output file
3274 below. */
3d4d4302 3275 s = bfd_get_linker_section (dynobj, ".rela.got");
252b5132 3276 if (s != NULL)
eea6121a 3277 s->size = 0;
252b5132
RH		 3278 }
3279
b6152c34
AS		 3280 /* If this is a -Bsymbolic shared link, then we need to discard all
3281 PC relative relocs against symbols defined in a regular object.
3282 For the normal shared case we discard the PC relative relocs
3283 against symbols that have become local due to visibility changes.
3284 We allocated space for them in the check_relocs routine, but we
3285 will not fill them in in the relocate_section routine. */
0e1862bb 3286 if (bfd_link_pic (info))
0cca5f05
AS		 3287 elf_link_hash_traverse (elf_hash_table (info),
3288 elf_m68k_discard_copies,
2c3fc389 3289 info);
252b5132
RH		 3290
3291 /* The check_relocs and adjust_dynamic_symbol entry points have
3292 determined the sizes of the various dynamic sections. Allocate
3293 memory for them. */
b34976b6
AM		 3294 plt = FALSE;
3295 relocs = FALSE;
252b5132
RH		 3296 for (s = dynobj->sections; s != NULL; s = s->next)
3297 {
3298 const char *name;
252b5132
RH		 3299
3300 if ((s->flags & SEC_LINKER_CREATED) == 0)
3301 continue;
3302
3303 /* It's OK to base decisions on the section name, because none
3304 of the dynobj section names depend upon the input files. */
3305 name = bfd_get_section_name (dynobj, s);
3306
252b5132
RH		 3307 if (strcmp (name, ".plt") == 0)
3308 {
c456f082
AM		 3309 /* Remember whether there is a PLT. */
3310 plt = s->size != 0;
252b5132 3311 }
0112cd26 3312 else if (CONST_STRNEQ (name, ".rela"))
252b5132 3313 {
c456f082 3314 if (s->size != 0)
252b5132 3315 {
b34976b6 3316 relocs = TRUE;
252b5132
RH		 3317
3318 /* We use the reloc_count field as a counter if we need
3319 to copy relocs into the output file. */
3320 s->reloc_count = 0;
3321 }
3322 }
0112cd26 3323 else if (! CONST_STRNEQ (name, ".got")
c456f082 3324 && strcmp (name, ".dynbss") != 0)
252b5132
RH		 3325 {
3326 /* It's not one of our sections, so don't allocate space. */
3327 continue;
3328 }
3329
c456f082 3330 if (s->size == 0)
252b5132 3331 {
c456f082
AM		 3332 /* If we don't need this section, strip it from the
3333 output file. This is mostly to handle .rela.bss and
3334 .rela.plt. We must create both sections in
3335 create_dynamic_sections, because they must be created
3336 before the linker maps input sections to output
3337 sections. The linker does that before
3338 adjust_dynamic_symbol is called, and it is that
3339 function which decides whether anything needs to go
3340 into these sections. */
8423293d 3341 s->flags |= SEC_EXCLUDE;
252b5132
RH		 3342 continue;
3343 }
3344
c456f082
AM		 3345 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3346 continue;
3347
252b5132 3348 /* Allocate memory for the section contents. */
7a9af8c4
NC		 3349 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3350 Unused entries should be reclaimed before the section's contents
3351 are written out, but at the moment this does not happen. Thus in
3352 order to prevent writing out garbage, we initialise the section's
3353 contents to zero. */
eea6121a 3354 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c456f082 3355 if (s->contents == NULL)
b34976b6 3356 return FALSE;
252b5132
RH		 3357 }
3358
3359 if (elf_hash_table (info)->dynamic_sections_created)
3360 {
3361 /* Add some entries to the .dynamic section. We fill in the
3362 values later, in elf_m68k_finish_dynamic_sections, but we
3363 must add the entries now so that we get the correct size for
3364 the .dynamic section. The DT_DEBUG entry is filled in by the
3365 dynamic linker and used by the debugger. */
dc810e39 3366#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3367 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3368
0e1862bb 3369 if (bfd_link_executable (info))
252b5132 3370 {
dc810e39 3371 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3372 return FALSE;
252b5132
RH		 3373 }
3374
3375 if (plt)
3376 {
dc810e39
AM		 3377 if (!add_dynamic_entry (DT_PLTGOT, 0)
3378 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3379 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3380 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3381 return FALSE;
252b5132
RH		 3382 }
3383
3384 if (relocs)
3385 {
dc810e39
AM		 3386 if (!add_dynamic_entry (DT_RELA, 0)
3387 || !add_dynamic_entry (DT_RELASZ, 0)
3388 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
b34976b6 3389 return FALSE;
252b5132
RH		 3390 }
3391
aa91b392 3392 if ((info->flags & DF_TEXTREL) != 0)
252b5132 3393 {
dc810e39 3394 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3395 return FALSE;
252b5132
RH		 3396 }
3397 }
dc810e39 3398#undef add_dynamic_entry
252b5132 3399
b34976b6 3400 return TRUE;
252b5132
RH		 3401}
3402
0cca5f05 3403/* This function is called via elf_link_hash_traverse if we are
b6152c34
AS		 3404 creating a shared object. In the -Bsymbolic case it discards the
3405 space allocated to copy PC relative relocs against symbols which
3e829b4a 3406 are defined in regular objects. For the normal shared case, it
b6152c34
AS		 3407 discards space for pc-relative relocs that have become local due to
3408 symbol visibility changes. We allocated space for them in the
3409 check_relocs routine, but we won't fill them in in the
3e829b4a
AS		 3410 relocate_section routine.
3411
3412 We also check whether any of the remaining relocations apply
3413 against a readonly section, and set the DF_TEXTREL flag in this
3414 case. */
252b5132 3415
b34976b6 3416static bfd_boolean
2c3fc389
NC		 3417elf_m68k_discard_copies (struct elf_link_hash_entry *h,
3418 void * inf)
252b5132 3419{
b6152c34 3420 struct bfd_link_info *info = (struct bfd_link_info *) inf;
252b5132
RH		 3421 struct elf_m68k_pcrel_relocs_copied *s;
3422
2516a1ee 3423 if (!SYMBOL_CALLS_LOCAL (info, h))
3e829b4a
AS		 3424 {
3425 if ((info->flags & DF_TEXTREL) == 0)
3426 {
3427 /* Look for relocations against read-only sections. */
0cca5f05
AS		 3428 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3429 s != NULL;
3430 s = s->next)
3e829b4a
AS		 3431 if ((s->section->flags & SEC_READONLY) != 0)
3432 {
3433 info->flags |= DF_TEXTREL;
3434 break;
3435 }
3436 }
0cca5f05 3437
cab0ad83
AS		 3438 /* Make sure undefined weak symbols are output as a dynamic symbol
3439 in PIEs. */
3440 if (h->non_got_ref
3441 && h->root.type == bfd_link_hash_undefweak
3442 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3443 && h->dynindx == -1
3444 && !h->forced_local)
3445 {
3446 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3447 return FALSE;
3448 }
3449
3e829b4a
AS		 3450 return TRUE;
3451 }
252b5132 3452
0cca5f05
AS		 3453 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3454 s != NULL;
3455 s = s->next)
eea6121a 3456 s->section->size -= s->count * sizeof (Elf32_External_Rela);
252b5132 3457
b34976b6 3458 return TRUE;
252b5132
RH		 3459}
3460
cf869cce
NC		 3461
3462/* Install relocation RELA. */
3463
3464static void
3465elf_m68k_install_rela (bfd *output_bfd,
3466 asection *srela,
3467 Elf_Internal_Rela *rela)
3468{
3469 bfd_byte *loc;
3470
3471 loc = srela->contents;
3472 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
3473 bfd_elf32_swap_reloca_out (output_bfd, rela, loc);
3474}
3475
325e58c7
NC		 3476/* Find the base offsets for thread-local storage in this object,
3477 for GD/LD and IE/LE respectively. */
3478
3479#define DTP_OFFSET 0x8000
3480#define TP_OFFSET 0x7000
cf869cce
NC		 3481
3482static bfd_vma
3483dtpoff_base (struct bfd_link_info *info)
3484{
3485 /* If tls_sec is NULL, we should have signalled an error already. */
3486 if (elf_hash_table (info)->tls_sec == NULL)
3487 return 0;
325e58c7 3488 return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET;
cf869cce
NC		 3489}
3490
cf869cce 3491static bfd_vma
325e58c7 3492tpoff_base (struct bfd_link_info *info)
cf869cce 3493{
cf869cce 3494 /* If tls_sec is NULL, we should have signalled an error already. */
325e58c7 3495 if (elf_hash_table (info)->tls_sec == NULL)
cf869cce 3496 return 0;
325e58c7
NC		 3497 return elf_hash_table (info)->tls_sec->vma + TP_OFFSET;
3498}
3499
3500/* Output necessary relocation to handle a symbol during static link.
3501 This function is called from elf_m68k_relocate_section. */
3502
3503static void
3504elf_m68k_init_got_entry_static (struct bfd_link_info *info,
3505 bfd *output_bfd,
3506 enum elf_m68k_reloc_type r_type,
3507 asection *sgot,
3508 bfd_vma got_entry_offset,
3509 bfd_vma relocation)
3510{
3511 switch (elf_m68k_reloc_got_type (r_type))
3512 {
3513 case R_68K_GOT32O:
3514 bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset);
3515 break;
3516
3517 case R_68K_TLS_GD32:
3518 /* We know the offset within the module,
3519 put it into the second GOT slot. */
3520 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3521 sgot->contents + got_entry_offset + 4);
3522 /* FALLTHRU */
3523
3524 case R_68K_TLS_LDM32:
3525 /* Mark it as belonging to module 1, the executable. */
3526 bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset);
3527 break;
3528
3529 case R_68K_TLS_IE32:
3530 bfd_put_32 (output_bfd, relocation - tpoff_base (info),
3531 sgot->contents + got_entry_offset);
3532 break;
3533
3534 default:
3535 BFD_ASSERT (FALSE);
3536 }
3537}
3538
3539/* Output necessary relocation to handle a local symbol
3540 during dynamic link.
3541 This function is called either from elf_m68k_relocate_section
3542 or from elf_m68k_finish_dynamic_symbol. */
3543
3544static void
3545elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info,
3546 bfd *output_bfd,
3547 enum elf_m68k_reloc_type r_type,
3548 asection *sgot,
3549 bfd_vma got_entry_offset,
3550 bfd_vma relocation,
3551 asection *srela)
3552{
3553 Elf_Internal_Rela outrel;
3554
3555 switch (elf_m68k_reloc_got_type (r_type))
3556 {
3557 case R_68K_GOT32O:
3558 /* Emit RELATIVE relocation to initialize GOT slot
3559 at run-time. */
3560 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
3561 outrel.r_addend = relocation;
3562 break;
3563
3564 case R_68K_TLS_GD32:
3565 /* We know the offset within the module,
3566 put it into the second GOT slot. */
3567 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3568 sgot->contents + got_entry_offset + 4);
3569 /* FALLTHRU */
3570
3571 case R_68K_TLS_LDM32:
3572 /* We don't know the module number,
3573 create a relocation for it. */
3574 outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32);
3575 outrel.r_addend = 0;
3576 break;
3577
3578 case R_68K_TLS_IE32:
3579 /* Emit TPREL relocation to initialize GOT slot
3580 at run-time. */
3581 outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32);
3582 outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma;
3583 break;
3584
3585 default:
3586 BFD_ASSERT (FALSE);
3587 }
3588
3589 /* Offset of the GOT entry. */
3590 outrel.r_offset = (sgot->output_section->vma
3591 + sgot->output_offset
3592 + got_entry_offset);
3593
3594 /* Install one of the above relocations. */
3595 elf_m68k_install_rela (output_bfd, srela, &outrel);
3596
3597 bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset);
cf869cce
NC		 3598}
3599
252b5132
RH		 3600/* Relocate an M68K ELF section. */
3601
b34976b6 3602static bfd_boolean
2c3fc389
NC		 3603elf_m68k_relocate_section (bfd *output_bfd,
3604 struct bfd_link_info *info,
3605 bfd *input_bfd,
3606 asection *input_section,
3607 bfd_byte *contents,
3608 Elf_Internal_Rela *relocs,
3609 Elf_Internal_Sym *local_syms,
3610 asection **local_sections)
252b5132
RH		 3611{
3612 bfd *dynobj;
3613 Elf_Internal_Shdr *symtab_hdr;
3614 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 3615 asection *sgot;
3616 asection *splt;
3617 asection *sreloc;
325e58c7 3618 asection *srela;
7fb9f789 3619 struct elf_m68k_got *got;
252b5132
RH		 3620 Elf_Internal_Rela *rel;
3621 Elf_Internal_Rela *relend;
3622
3623 dynobj = elf_hash_table (info)->dynobj;
3624 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3625 sym_hashes = elf_sym_hashes (input_bfd);
252b5132
RH		 3626
3627 sgot = NULL;
3628 splt = NULL;
3629 sreloc = NULL;
325e58c7 3630 srela = NULL;
252b5132 3631
7fb9f789
NC		 3632 got = NULL;
3633
252b5132
RH		 3634 rel = relocs;
3635 relend = relocs + input_section->reloc_count;
3636 for (; rel < relend; rel++)
3637 {
3638 int r_type;
3639 reloc_howto_type *howto;
3640 unsigned long r_symndx;
3641 struct elf_link_hash_entry *h;
3642 Elf_Internal_Sym *sym;
3643 asection *sec;
3644 bfd_vma relocation;
44f745a6 3645 bfd_boolean unresolved_reloc;
252b5132
RH		 3646 bfd_reloc_status_type r;
3647
3648 r_type = ELF32_R_TYPE (rel->r_info);
3649 if (r_type < 0 || r_type >= (int) R_68K_max)
3650 {
3651 bfd_set_error (bfd_error_bad_value);
b34976b6 3652 return FALSE;
252b5132
RH		 3653 }
3654 howto = howto_table + r_type;
3655
3656 r_symndx = ELF32_R_SYM (rel->r_info);
3657
252b5132
RH		 3658 h = NULL;
3659 sym = NULL;
3660 sec = NULL;
44f745a6 3661 unresolved_reloc = FALSE;
560e09e9 3662
252b5132
RH		 3663 if (r_symndx < symtab_hdr->sh_info)
3664 {
3665 sym = local_syms + r_symndx;
3666 sec = local_sections[r_symndx];
8517fae7 3667 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
252b5132
RH		 3668 }
3669 else
3670 {
62d887d4 3671 bfd_boolean warned, ignored;
560e09e9 3672
b2a8e766
AM		 3673 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3674 r_symndx, symtab_hdr, sym_hashes,
3675 h, sec, relocation,
62d887d4 3676 unresolved_reloc, warned, ignored);
252b5132
RH		 3677 }
3678
dbaa2011 3679 if (sec != NULL && discarded_section (sec))
e4067dbb 3680 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3681 rel, 1, relend, howto, 0, contents);
ab96bf03 3682
0e1862bb 3683 if (bfd_link_relocatable (info))
ab96bf03
AM		 3684 continue;
3685
252b5132
RH		 3686 switch (r_type)
3687 {
3688 case R_68K_GOT8:
3689 case R_68K_GOT16:
3690 case R_68K_GOT32:
3691 /* Relocation is to the address of the entry for this symbol
3692 in the global offset table. */
3693 if (h != NULL
3694 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
7fb9f789 3695 {
7fb9f789
NC		 3696 if (elf_m68k_hash_table (info)->local_gp_p)
3697 {
3698 bfd_vma sgot_output_offset;
3699 bfd_vma got_offset;
3700
3701 if (sgot == NULL)
3702 {
3d4d4302 3703 sgot = bfd_get_linker_section (dynobj, ".got");
7fb9f789
NC		 3704
3705 if (sgot != NULL)
3706 sgot_output_offset = sgot->output_offset;
3707 else
3708 /* In this case we have a reference to
3709 _GLOBAL_OFFSET_TABLE_, but the GOT itself is
3710 empty.
3711 ??? Issue a warning? */
3712 sgot_output_offset = 0;
3713 }
3714 else
3715 sgot_output_offset = sgot->output_offset;
3716
3717 if (got == NULL)
3718 {
3719 struct elf_m68k_bfd2got_entry *bfd2got_entry;
3720
3721 bfd2got_entry
3722 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3723 input_bfd, SEARCH, NULL);
3724
3725 if (bfd2got_entry != NULL)
3726 {
3727 got = bfd2got_entry->got;
3728 BFD_ASSERT (got != NULL);
3729
3730 got_offset = got->offset;
3731 }
3732 else
3733 /* In this case we have a reference to
3734 _GLOBAL_OFFSET_TABLE_, but no other references
3735 accessing any GOT entries.
3736 ??? Issue a warning? */
3737 got_offset = 0;
3738 }
3739 else
3740 got_offset = got->offset;
3741
3742 /* Adjust GOT pointer to point to the GOT
3743 assigned to input_bfd. */
f57718b4 3744 rel->r_addend += sgot_output_offset + got_offset;
7fb9f789
NC		 3745 }
3746 else
3747 BFD_ASSERT (got == NULL || got->offset == 0);
3748
3749 break;
3750 }
252b5132
RH		 3751 /* Fall through. */
3752 case R_68K_GOT8O:
3753 case R_68K_GOT16O:
3754 case R_68K_GOT32O:
cf869cce
NC		 3755
3756 case R_68K_TLS_LDM32:
3757 case R_68K_TLS_LDM16:
3758 case R_68K_TLS_LDM8:
3759
3760 case R_68K_TLS_GD8:
3761 case R_68K_TLS_GD16:
3762 case R_68K_TLS_GD32:
3763
3764 case R_68K_TLS_IE8:
3765 case R_68K_TLS_IE16:
3766 case R_68K_TLS_IE32:
3767
252b5132
RH		 3768 /* Relocation is the offset of the entry for this symbol in
3769 the global offset table. */
3770
3771 {
7fb9f789
NC		 3772 struct elf_m68k_got_entry_key key_;
3773 bfd_vma *off_ptr;
252b5132
RH		 3774 bfd_vma off;
3775
3776 if (sgot == NULL)
3777 {
3d4d4302 3778 sgot = bfd_get_linker_section (dynobj, ".got");
252b5132
RH		 3779 BFD_ASSERT (sgot != NULL);
3780 }
3781
7fb9f789
NC		 3782 if (got == NULL)
3783 {
3784 got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3785 input_bfd, MUST_FIND,
3786 NULL)->got;
3787 BFD_ASSERT (got != NULL);
3788 }
3789
3790 /* Get GOT offset for this symbol. */
cf869cce
NC		 3791 elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx,
3792 r_type);
7fb9f789
NC		 3793 off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND,
3794 NULL)->u.s2.offset;
3795 off = *off_ptr;
3796
cf869cce
NC		 3797 /* The offset must always be a multiple of 4. We use
3798 the least significant bit to record whether we have
3799 already generated the necessary reloc. */
3800 if ((off & 1) != 0)
3801 off &= ~1;
3802 else
252b5132 3803 {
cf869cce
NC		 3804 if (h != NULL
3805 /* @TLSLDM relocations are bounded to the module, in
3806 which the symbol is defined -- not to the symbol
3807 itself. */
3808 && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32)
252b5132 3809 {
cf869cce
NC		 3810 bfd_boolean dyn;
3811
3812 dyn = elf_hash_table (info)->dynamic_sections_created;
0e1862bb
L		 3813 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3814 bfd_link_pic (info),
3815 h)
3816 || (bfd_link_pic (info)
cf869cce
NC		 3817 && SYMBOL_REFERENCES_LOCAL (info, h))
3818 || (ELF_ST_VISIBILITY (h->other)
3819 && h->root.type == bfd_link_hash_undefweak))
252b5132 3820 {
cf869cce
NC		 3821 /* This is actually a static link, or it is a
3822 -Bsymbolic link and the symbol is defined
3823 locally, or the symbol was forced to be local
325e58c7 3824 because of a version file. We must initialize
cf869cce
NC		 3825 this entry in the global offset table. Since
3826 the offset must always be a multiple of 4, we
3827 use the least significant bit to record whether
3828 we have initialized it already.
3829
3830 When doing a dynamic link, we create a .rela.got
3831 relocation entry to initialize the value. This
3832 is done in the finish_dynamic_symbol routine. */
3833
325e58c7
NC		 3834 elf_m68k_init_got_entry_static (info,
3835 output_bfd,
3836 r_type,
3837 sgot,
3838 off,
3839 relocation);
cf869cce 3840
7fb9f789 3841 *off_ptr |= 1;
252b5132 3842 }
cf869cce
NC		 3843 else
3844 unresolved_reloc = FALSE;
252b5132 3845 }
0e1862bb 3846 else if (bfd_link_pic (info)) /* && h == NULL */
325e58c7 3847 /* Process local symbol during dynamic link. */
252b5132 3848 {
325e58c7 3849 if (srela == NULL)
252b5132 3850 {
3d4d4302 3851 srela = bfd_get_linker_section (dynobj, ".rela.got");
325e58c7 3852 BFD_ASSERT (srela != NULL);
cf869cce 3853 }
cf869cce 3854
325e58c7
NC		 3855 elf_m68k_init_got_entry_local_shared (info,
3856 output_bfd,
3857 r_type,
3858 sgot,
3859 off,
3860 relocation,
3861 srela);
cf869cce
NC		 3862
3863 *off_ptr |= 1;
3864 }
0e1862bb 3865 else /* h == NULL && !bfd_link_pic (info) */
cf869cce 3866 {
325e58c7
NC		 3867 elf_m68k_init_got_entry_static (info,
3868 output_bfd,
3869 r_type,
3870 sgot,
3871 off,
3872 relocation);
252b5132 3873
7fb9f789 3874 *off_ptr |= 1;
252b5132
RH		 3875 }
3876 }
3877
cf869cce
NC		 3878 /* We don't use elf_m68k_reloc_got_type in the condition below
3879 because this is the only place where difference between
3880 R_68K_GOTx and R_68K_GOTxO relocations matters. */
3881 if (r_type == R_68K_GOT32O
252b5132 3882 || r_type == R_68K_GOT16O
cf869cce
NC		 3883 || r_type == R_68K_GOT8O
3884 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32
3885 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32
3886 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32)
252b5132 3887 {
7fb9f789
NC		 3888 /* GOT pointer is adjusted to point to the start/middle
3889 of local GOT. Adjust the offset accordingly. */
3890 BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p
3891 || off >= got->offset);
3892
3893 if (elf_m68k_hash_table (info)->local_gp_p)
3894 relocation = off - got->offset;
3895 else
3896 {
3897 BFD_ASSERT (got->offset == 0);
3898 relocation = sgot->output_offset + off;
3899 }
3900
252b5132
RH		 3901 /* This relocation does not use the addend. */
3902 rel->r_addend = 0;
3903 }
3904 else
7fb9f789
NC		 3905 relocation = (sgot->output_section->vma + sgot->output_offset
3906 + off);
252b5132
RH		 3907 }
3908 break;
3909
cf869cce
NC		 3910 case R_68K_TLS_LDO32:
3911 case R_68K_TLS_LDO16:
3912 case R_68K_TLS_LDO8:
3913 relocation -= dtpoff_base (info);
3914 break;
3915
3916 case R_68K_TLS_LE32:
3917 case R_68K_TLS_LE16:
3918 case R_68K_TLS_LE8:
3cbc1e5e 3919 if (bfd_link_dll (info))
cf869cce
NC		 3920 {
3921 (*_bfd_error_handler)
3922 (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted "
3923 "in shared object"),
3924 input_bfd, input_section, (long) rel->r_offset, howto->name);
3925
3926 return FALSE;
3927 }
3928 else
325e58c7 3929 relocation -= tpoff_base (info);
cf869cce
NC		 3930
3931 break;
3932
252b5132
RH		 3933 case R_68K_PLT8:
3934 case R_68K_PLT16:
3935 case R_68K_PLT32:
3936 /* Relocation is to the entry for this symbol in the
3937 procedure linkage table. */
3938
3939 /* Resolve a PLTxx reloc against a local symbol directly,
3940 without using the procedure linkage table. */
3941 if (h == NULL)
3942 break;
3943
3944 if (h->plt.offset == (bfd_vma) -1
3945 || !elf_hash_table (info)->dynamic_sections_created)
3946 {
3947 /* We didn't make a PLT entry for this symbol. This
3948 happens when statically linking PIC code, or when
3949 using -Bsymbolic. */
3950 break;
3951 }
3952
3953 if (splt == NULL)
3954 {
3d4d4302 3955 splt = bfd_get_linker_section (dynobj, ".plt");
252b5132
RH		 3956 BFD_ASSERT (splt != NULL);
3957 }
3958
3959 relocation = (splt->output_section->vma
3960 + splt->output_offset
3961 + h->plt.offset);
44f745a6 3962 unresolved_reloc = FALSE;
252b5132
RH		 3963 break;
3964
3965 case R_68K_PLT8O:
3966 case R_68K_PLT16O:
3967 case R_68K_PLT32O:
3968 /* Relocation is the offset of the entry for this symbol in
3969 the procedure linkage table. */
3970 BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
3971
3972 if (splt == NULL)
3973 {
3d4d4302 3974 splt = bfd_get_linker_section (dynobj, ".plt");
252b5132
RH		 3975 BFD_ASSERT (splt != NULL);
3976 }
3977
3978 relocation = h->plt.offset;
44f745a6 3979 unresolved_reloc = FALSE;
252b5132
RH		 3980
3981 /* This relocation does not use the addend. */
3982 rel->r_addend = 0;
3983
3984 break;
3985
252b5132
RH		 3986 case R_68K_8:
3987 case R_68K_16:
3988 case R_68K_32:
2516a1ee
AS		 3989 case R_68K_PC8:
3990 case R_68K_PC16:
3991 case R_68K_PC32:
0e1862bb 3992 if (bfd_link_pic (info)
cf35638d 3993 && r_symndx != STN_UNDEF
252b5132 3994 && (input_section->flags & SEC_ALLOC) != 0
d2ff124f
AS		 3995 && (h == NULL
3996 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3997 || h->root.type != bfd_link_hash_undefweak)
252b5132
RH		 3998 && ((r_type != R_68K_PC8
3999 && r_type != R_68K_PC16
4000 && r_type != R_68K_PC32)
2516a1ee 4001 || !SYMBOL_CALLS_LOCAL (info, h)))
252b5132
RH		 4002 {
4003 Elf_Internal_Rela outrel;
947216bf 4004 bfd_byte *loc;
b34976b6 4005 bfd_boolean skip, relocate;
252b5132
RH		 4006
4007 /* When generating a shared object, these relocations
4008 are copied into the output file to be resolved at run
4009 time. */
4010
b34976b6
AM		 4011 skip = FALSE;
4012 relocate = FALSE;
252b5132 4013
c629eae0
JJ		 4014 outrel.r_offset =
4015 _bfd_elf_section_offset (output_bfd, info, input_section,
4016 rel->r_offset);
4017 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4018 skip = TRUE;
0bb2d96a 4019 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4020 skip = TRUE, relocate = TRUE;
252b5132
RH		 4021 outrel.r_offset += (input_section->output_section->vma
4022 + input_section->output_offset);
4023
4024 if (skip)
0bb2d96a 4025 memset (&outrel, 0, sizeof outrel);
252b5132 4026 else if (h != NULL
d2ff124f
AS		 4027 && h->dynindx != -1
4028 && (r_type == R_68K_PC8
4029 || r_type == R_68K_PC16
4030 || r_type == R_68K_PC32
0e1862bb 4031 || !bfd_link_pic (info)
a496fbc8 4032 || !SYMBOLIC_BIND (info, h)
f5385ebf 4033 || !h->def_regular))
252b5132 4034 {
252b5132 4035 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
d2ff124f 4036 outrel.r_addend = rel->r_addend;
252b5132
RH		 4037 }
4038 else
4039 {
d2ff124f 4040 /* This symbol is local, or marked to become local. */
74541ad4
AM		 4041 outrel.r_addend = relocation + rel->r_addend;
4042
252b5132
RH		 4043 if (r_type == R_68K_32)
4044 {
b34976b6 4045 relocate = TRUE;
252b5132 4046 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
252b5132
RH		 4047 }
4048 else
4049 {
4050 long indx;
4051
8517fae7 4052 if (bfd_is_abs_section (sec))
252b5132
RH		 4053 indx = 0;
4054 else if (sec == NULL || sec->owner == NULL)
4055 {
4056 bfd_set_error (bfd_error_bad_value);
b34976b6 4057 return FALSE;
252b5132
RH		 4058 }
4059 else
4060 {
4061 asection *osec;
4062
74541ad4
AM		 4063 /* We are turning this relocation into one
4064 against a section symbol. It would be
4065 proper to subtract the symbol's value,
4066 osec->vma, from the emitted reloc addend,
4067 but ld.so expects buggy relocs. */
252b5132
RH		 4068 osec = sec->output_section;
4069 indx = elf_section_data (osec)->dynindx;
74541ad4
AM		 4070 if (indx == 0)
4071 {
4072 struct elf_link_hash_table *htab;
4073 htab = elf_hash_table (info);
4074 osec = htab->text_index_section;
4075 indx = elf_section_data (osec)->dynindx;
4076 }
4077 BFD_ASSERT (indx != 0);
252b5132
RH		 4078 }
4079
252b5132 4080 outrel.r_info = ELF32_R_INFO (indx, r_type);
252b5132
RH		 4081 }
4082 }
4083
d2ff124f
AS		 4084 sreloc = elf_section_data (input_section)->sreloc;
4085 if (sreloc == NULL)
4086 abort ();
4087
947216bf
AM		 4088 loc = sreloc->contents;
4089 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4090 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
252b5132
RH		 4091
4092 /* This reloc will be computed at runtime, so there's no
4093 need to do anything now, except for R_68K_32
4094 relocations that have been turned into
4095 R_68K_RELATIVE. */
4096 if (!relocate)
4097 continue;
4098 }
4099
4100 break;
4101
4102 case R_68K_GNU_VTINHERIT:
4103 case R_68K_GNU_VTENTRY:
4104 /* These are no-ops in the end. */
4105 continue;
4106
4107 default:
4108 break;
4109 }
4110
44f745a6
AS		 4111 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4112 because such sections are not SEC_ALLOC and thus ld.so will
4113 not process them. */
4114 if (unresolved_reloc
4115 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4116 && h->def_dynamic)
4117 && _bfd_elf_section_offset (output_bfd, info, input_section,
4118 rel->r_offset) != (bfd_vma) -1)
44f745a6
AS		 4119 {
4120 (*_bfd_error_handler)
843fe662 4121 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 4122 input_bfd,
4123 input_section,
44f745a6 4124 (long) rel->r_offset,
843fe662 4125 howto->name,
44f745a6
AS		 4126 h->root.root.string);
4127 return FALSE;
4128 }
4129
cf35638d 4130 if (r_symndx != STN_UNDEF
cf869cce
NC		 4131 && r_type != R_68K_NONE
4132 && (h == NULL
4133 || h->root.type == bfd_link_hash_defined
4134 || h->root.type == bfd_link_hash_defweak))
4135 {
4136 char sym_type;
4137
4138 sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type;
4139
4140 if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS))
4141 {
4142 const char *name;
4143
4144 if (h != NULL)
4145 name = h->root.root.string;
4146 else
4147 {
4148 name = (bfd_elf_string_from_elf_section
4149 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4150 if (name == NULL || *name == '\0')
4151 name = bfd_section_name (input_bfd, sec);
4152 }
4153
4154 (*_bfd_error_handler)
4155 ((sym_type == STT_TLS
4156 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4157 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4158 input_bfd,
4159 input_section,
4160 (long) rel->r_offset,
4161 howto->name,
4162 name);
4163 }
4164 }
4165
252b5132
RH		 4166 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4167 contents, rel->r_offset,
4168 relocation, rel->r_addend);
4169
4170 if (r != bfd_reloc_ok)
4171 {
44f745a6
AS		 4172 const char *name;
4173
4174 if (h != NULL)
4175 name = h->root.root.string;
4176 else
252b5132 4177 {
44f745a6
AS		 4178 name = bfd_elf_string_from_elf_section (input_bfd,
4179 symtab_hdr->sh_link,
4180 sym->st_name);
4181 if (name == NULL)
4182 return FALSE;
4183 if (*name == '\0')
4184 name = bfd_section_name (input_bfd, sec);
4185 }
252b5132 4186
44f745a6
AS		 4187 if (r == bfd_reloc_overflow)
4188 {
4189 if (!(info->callbacks->reloc_overflow
dfeffb9f
L		 4190 (info, (h ? &h->root : NULL), name, howto->name,
4191 (bfd_vma) 0, input_bfd, input_section,
4192 rel->r_offset)))
44f745a6
AS		 4193 return FALSE;
4194 }
4195 else
4196 {
4197 (*_bfd_error_handler)
d003868e
AM		 4198 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4199 input_bfd, input_section,
44f745a6
AS		 4200 (long) rel->r_offset, name, (int) r);
4201 return FALSE;
252b5132
RH		 4202 }
4203 }
4204 }
4205
b34976b6 4206 return TRUE;
252b5132
RH		 4207}
4208
cc3e26be
RS		 4209/* Install an M_68K_PC32 relocation against VALUE at offset OFFSET
4210 into section SEC. */
4211
4212static void
4213elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value)
4214{
4215 /* Make VALUE PC-relative. */
4216 value -= sec->output_section->vma + offset;
4217
4218 /* Apply any in-place addend. */
4219 value += bfd_get_32 (sec->owner, sec->contents + offset);
4220
4221 bfd_put_32 (sec->owner, value, sec->contents + offset);
4222}
4223
252b5132
RH		 4224/* Finish up dynamic symbol handling. We set the contents of various
4225 dynamic sections here. */
4226
b34976b6 4227static bfd_boolean
2c3fc389
NC		 4228elf_m68k_finish_dynamic_symbol (bfd *output_bfd,
4229 struct bfd_link_info *info,
4230 struct elf_link_hash_entry *h,
4231 Elf_Internal_Sym *sym)
252b5132
RH		 4232{
4233 bfd *dynobj;
4234
4235 dynobj = elf_hash_table (info)->dynobj;
4236
4237 if (h->plt.offset != (bfd_vma) -1)
4238 {
cc3e26be 4239 const struct elf_m68k_plt_info *plt_info;
252b5132
RH		 4240 asection *splt;
4241 asection *sgot;
4242 asection *srela;
4243 bfd_vma plt_index;
4244 bfd_vma got_offset;
4245 Elf_Internal_Rela rela;
947216bf 4246 bfd_byte *loc;
252b5132
RH		 4247
4248 /* This symbol has an entry in the procedure linkage table. Set
4249 it up. */
4250
4251 BFD_ASSERT (h->dynindx != -1);
4252
cc3e26be 4253 plt_info = elf_m68k_hash_table (info)->plt_info;
3d4d4302
AM		 4254 splt = bfd_get_linker_section (dynobj, ".plt");
4255 sgot = bfd_get_linker_section (dynobj, ".got.plt");
4256 srela = bfd_get_linker_section (dynobj, ".rela.plt");
252b5132
RH		 4257 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
4258
4259 /* Get the index in the procedure linkage table which
4260 corresponds to this symbol. This is the index of this symbol
4261 in all the symbols for which we are making plt entries. The
4262 first entry in the procedure linkage table is reserved. */
cc3e26be 4263 plt_index = (h->plt.offset / plt_info->size) - 1;
252b5132
RH		 4264
4265 /* Get the offset into the .got table of the entry that
4266 corresponds to this function. Each .got entry is 4 bytes.
4267 The first three are reserved. */
4268 got_offset = (plt_index + 3) * 4;
4269
cc3e26be
RS		 4270 memcpy (splt->contents + h->plt.offset,
4271 plt_info->symbol_entry,
4272 plt_info->size);
4273
4274 elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got,
4275 (sgot->output_section->vma
4276 + sgot->output_offset
4277 + got_offset));
252b5132
RH		 4278
4279 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
cc3e26be
RS		 4280 splt->contents
4281 + h->plt.offset
4282 + plt_info->symbol_resolve_entry + 2);
4283
4284 elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt,
4285 splt->output_section->vma);
252b5132
RH		 4286
4287 /* Fill in the entry in the global offset table. */
4288 bfd_put_32 (output_bfd,
4289 (splt->output_section->vma
4290 + splt->output_offset
4291 + h->plt.offset
cc3e26be 4292 + plt_info->symbol_resolve_entry),
252b5132
RH		 4293 sgot->contents + got_offset);
4294
4295 /* Fill in the entry in the .rela.plt section. */
4296 rela.r_offset = (sgot->output_section->vma
4297 + sgot->output_offset
4298 + got_offset);
4299 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
4300 rela.r_addend = 0;
947216bf
AM		 4301 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
4302 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
252b5132 4303
f5385ebf 4304 if (!h->def_regular)
252b5132
RH		 4305 {
4306 /* Mark the symbol as undefined, rather than as defined in
4307 the .plt section. Leave the value alone. */
4308 sym->st_shndx = SHN_UNDEF;
4309 }
4310 }
4311
7fb9f789 4312 if (elf_m68k_hash_entry (h)->glist != NULL)
252b5132
RH		 4313 {
4314 asection *sgot;
4315 asection *srela;
7fb9f789 4316 struct elf_m68k_got_entry *got_entry;
252b5132
RH		 4317
4318 /* This symbol has an entry in the global offset table. Set it
4319 up. */
4320
3d4d4302
AM		 4321 sgot = bfd_get_linker_section (dynobj, ".got");
4322 srela = bfd_get_linker_section (dynobj, ".rela.got");
252b5132
RH		 4323 BFD_ASSERT (sgot != NULL && srela != NULL);
4324
7fb9f789
NC		 4325 got_entry = elf_m68k_hash_entry (h)->glist;
4326
4327 while (got_entry != NULL)
252b5132 4328 {
325e58c7 4329 enum elf_m68k_reloc_type r_type;
cf869cce
NC		 4330 bfd_vma got_entry_offset;
4331
325e58c7 4332 r_type = got_entry->key_.type;
cf869cce 4333 got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1;
7fb9f789 4334
7fb9f789
NC		 4335 /* If this is a -Bsymbolic link, and the symbol is defined
4336 locally, we just want to emit a RELATIVE reloc. Likewise if
4337 the symbol was forced to be local because of a version file.
cf869cce 4338 The entry in the global offset table already have been
7fb9f789 4339 initialized in the relocate_section function. */
0e1862bb 4340 if (bfd_link_pic (info)
2516a1ee 4341 && SYMBOL_REFERENCES_LOCAL (info, h))
7fb9f789 4342 {
325e58c7 4343 bfd_vma relocation;
cf869cce 4344
325e58c7
NC		 4345 relocation = bfd_get_signed_32 (output_bfd,
4346 (sgot->contents
4347 + got_entry_offset));
4348
4349 /* Undo TP bias. */
4350 switch (elf_m68k_reloc_got_type (r_type))
cf869cce
NC		 4351 {
4352 case R_68K_GOT32O:
325e58c7 4353 case R_68K_TLS_LDM32:
cf869cce
NC		 4354 break;
4355
4356 case R_68K_TLS_GD32:
93b3ac75
AS		 4357 /* The value for this relocation is actually put in
4358 the second GOT slot. */
4359 relocation = bfd_get_signed_32 (output_bfd,
4360 (sgot->contents
4361 + got_entry_offset + 4));
325e58c7 4362 relocation += dtpoff_base (info);
cf869cce
NC		 4363 break;
4364
4365 case R_68K_TLS_IE32:
325e58c7 4366 relocation += tpoff_base (info);
cf869cce
NC		 4367 break;
4368
4369 default:
4370 BFD_ASSERT (FALSE);
cf869cce
NC		 4371 }
4372
325e58c7
NC		 4373 elf_m68k_init_got_entry_local_shared (info,
4374 output_bfd,
4375 r_type,
4376 sgot,
4377 got_entry_offset,
4378 relocation,
4379 srela);
7fb9f789
NC		 4380 }
4381 else
4382 {
325e58c7
NC		 4383 Elf_Internal_Rela rela;
4384
cf869cce
NC		 4385 /* Put zeros to GOT slots that will be initialized
4386 at run-time. */
4387 {
4388 bfd_vma n_slots;
4389
4390 n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type);
4391 while (n_slots--)
4392 bfd_put_32 (output_bfd, (bfd_vma) 0,
4393 (sgot->contents + got_entry_offset
4394 + 4 * n_slots));
4395 }
4396
7fb9f789 4397 rela.r_addend = 0;
325e58c7
NC		 4398 rela.r_offset = (sgot->output_section->vma
4399 + sgot->output_offset
4400 + got_entry_offset);
252b5132 4401
325e58c7 4402 switch (elf_m68k_reloc_got_type (r_type))
cf869cce
NC		 4403 {
4404 case R_68K_GOT32O:
4405 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
4406 elf_m68k_install_rela (output_bfd, srela, &rela);
4407 break;
4408
4409 case R_68K_TLS_GD32:
4410 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32);
4411 elf_m68k_install_rela (output_bfd, srela, &rela);
4412
4413 rela.r_offset += 4;
4414 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32);
4415 elf_m68k_install_rela (output_bfd, srela, &rela);
4416 break;
4417
4418 case R_68K_TLS_IE32:
4419 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32);
4420 elf_m68k_install_rela (output_bfd, srela, &rela);
4421 break;
4422
4423 default:
4424 BFD_ASSERT (FALSE);
4425 break;
4426 }
4427 }
7fb9f789
NC		 4428
4429 got_entry = got_entry->u.s2.next;
4430 }
252b5132
RH		 4431 }
4432
f5385ebf 4433 if (h->needs_copy)
252b5132
RH		 4434 {
4435 asection *s;
4436 Elf_Internal_Rela rela;
947216bf 4437 bfd_byte *loc;
252b5132
RH		 4438
4439 /* This symbol needs a copy reloc. Set it up. */
4440
4441 BFD_ASSERT (h->dynindx != -1
4442 && (h->root.type == bfd_link_hash_defined
4443 || h->root.type == bfd_link_hash_defweak));
4444
3d4d4302 4445 s = bfd_get_linker_section (dynobj, ".rela.bss");
252b5132
RH		 4446 BFD_ASSERT (s != NULL);
4447
4448 rela.r_offset = (h->root.u.def.value
4449 + h->root.u.def.section->output_section->vma
4450 + h->root.u.def.section->output_offset);
4451 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
4452 rela.r_addend = 0;
947216bf
AM		 4453 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4454 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
252b5132
RH		 4455 }
4456
b34976b6 4457 return TRUE;
252b5132
RH		 4458}
4459
4460/* Finish up the dynamic sections. */
4461
b34976b6 4462static bfd_boolean
2c3fc389 4463elf_m68k_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132
RH		 4464{
4465 bfd *dynobj;
4466 asection *sgot;
4467 asection *sdyn;
4468
4469 dynobj = elf_hash_table (info)->dynobj;
4470
3d4d4302 4471 sgot = bfd_get_linker_section (dynobj, ".got.plt");
252b5132 4472 BFD_ASSERT (sgot != NULL);
3d4d4302 4473 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
252b5132
RH		 4474
4475 if (elf_hash_table (info)->dynamic_sections_created)
4476 {
4477 asection *splt;
4478 Elf32_External_Dyn *dyncon, *dynconend;
4479
3d4d4302 4480 splt = bfd_get_linker_section (dynobj, ".plt");
252b5132
RH		 4481 BFD_ASSERT (splt != NULL && sdyn != NULL);
4482
4483 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 4484 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 4485 for (; dyncon < dynconend; dyncon++)
4486 {
4487 Elf_Internal_Dyn dyn;
4488 const char *name;
4489 asection *s;
4490
4491 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4492
4493 switch (dyn.d_tag)
4494 {
4495 default:
4496 break;
4497
4498 case DT_PLTGOT:
4499 name = ".got";
4500 goto get_vma;
4501 case DT_JMPREL:
4502 name = ".rela.plt";
4503 get_vma:
4504 s = bfd_get_section_by_name (output_bfd, name);
4505 BFD_ASSERT (s != NULL);
4506 dyn.d_un.d_ptr = s->vma;
4507 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4508 break;
4509
4510 case DT_PLTRELSZ:
4511 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4512 BFD_ASSERT (s != NULL);
eea6121a 4513 dyn.d_un.d_val = s->size;
252b5132
RH		 4514 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4515 break;
4516
4517 case DT_RELASZ:
4518 /* The procedure linkage table relocs (DT_JMPREL) should
4519 not be included in the overall relocs (DT_RELA).
4520 Therefore, we override the DT_RELASZ entry here to
4521 make it not include the JMPREL relocs. Since the
4522 linker script arranges for .rela.plt to follow all
4523 other relocation sections, we don't have to worry
4524 about changing the DT_RELA entry. */
4525 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4526 if (s != NULL)
eea6121a 4527 dyn.d_un.d_val -= s->size;
252b5132
RH		 4528 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4529 break;
4530 }
4531 }
4532
4533 /* Fill in the first entry in the procedure linkage table. */
eea6121a 4534 if (splt->size > 0)
252b5132 4535 {
cc3e26be
RS		 4536 const struct elf_m68k_plt_info *plt_info;
4537
4538 plt_info = elf_m68k_hash_table (info)->plt_info;
4539 memcpy (splt->contents, plt_info->plt0_entry, plt_info->size);
4540
4541 elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4,
4542 (sgot->output_section->vma
4543 + sgot->output_offset
4544 + 4));
4545
4546 elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8,
4547 (sgot->output_section->vma
4548 + sgot->output_offset
4549 + 8));
4550
4551 elf_section_data (splt->output_section)->this_hdr.sh_entsize
4552 = plt_info->size;
252b5132 4553 }
252b5132
RH		 4554 }
4555
4556 /* Fill in the first three entries in the global offset table. */
eea6121a 4557 if (sgot->size > 0)
252b5132
RH		 4558 {
4559 if (sdyn == NULL)
4560 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4561 else
4562 bfd_put_32 (output_bfd,
4563 sdyn->output_section->vma + sdyn->output_offset,
4564 sgot->contents);
4565 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4566 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4567 }
4568
4569 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4570
b34976b6 4571 return TRUE;
252b5132
RH		 4572}
4573
0752970e
NC		 4574/* Given a .data section and a .emreloc in-memory section, store
4575 relocation information into the .emreloc section which can be
4576 used at runtime to relocate the section. This is called by the
4577 linker when the --embedded-relocs switch is used. This is called
4578 after the add_symbols entry point has been called for all the
4579 objects, and before the final_link entry point is called. */
4580
b34976b6 4581bfd_boolean
0752970e
NC		 4582bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg)
4583 bfd *abfd;
4584 struct bfd_link_info *info;
4585 asection *datasec;
4586 asection *relsec;
4587 char **errmsg;
4588{
4589 Elf_Internal_Shdr *symtab_hdr;
6cdc0ccc
AM		 4590 Elf_Internal_Sym *isymbuf = NULL;
4591 Elf_Internal_Rela *internal_relocs = NULL;
0752970e
NC		 4592 Elf_Internal_Rela *irel, *irelend;
4593 bfd_byte *p;
dc810e39 4594 bfd_size_type amt;
0752970e 4595
0e1862bb 4596 BFD_ASSERT (! bfd_link_relocatable (info));
0752970e
NC		 4597
4598 *errmsg = NULL;
4599
4600 if (datasec->reloc_count == 0)
b34976b6 4601 return TRUE;
0752970e
NC		 4602
4603 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
9ad5cbcf 4604
0752970e 4605 /* Get a copy of the native relocations. */
45d6a902 4606 internal_relocs = (_bfd_elf_link_read_relocs
2c3fc389 4607 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
0752970e
NC		 4608 info->keep_memory));
4609 if (internal_relocs == NULL)
4610 goto error_return;
0752970e 4611
dc810e39
AM		 4612 amt = (bfd_size_type) datasec->reloc_count * 12;
4613 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
0752970e
NC		 4614 if (relsec->contents == NULL)
4615 goto error_return;
4616
4617 p = relsec->contents;
4618
4619 irelend = internal_relocs + datasec->reloc_count;
4620 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
4621 {
4622 asection *targetsec;
4623
4624 /* We are going to write a four byte longword into the runtime
4625 reloc section. The longword will be the address in the data
4626 section which must be relocated. It is followed by the name
4627 of the target section NUL-padded or truncated to 8
4628 characters. */
4629
4630 /* We can only relocate absolute longword relocs at run time. */
4631 if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32)
4632 {
4633 *errmsg = _("unsupported reloc type");
4634 bfd_set_error (bfd_error_bad_value);
4635 goto error_return;
4636 }
4637
4638 /* Get the target section referred to by the reloc. */
4639 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4640 {
0752970e 4641 /* A local symbol. */
6cdc0ccc
AM		 4642 Elf_Internal_Sym *isym;
4643
4644 /* Read this BFD's local symbols if we haven't done so already. */
4645 if (isymbuf == NULL)
4646 {
4647 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4648 if (isymbuf == NULL)
4649 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4650 symtab_hdr->sh_info, 0,
4651 NULL, NULL, NULL);
4652 if (isymbuf == NULL)
4653 goto error_return;
4654 }
0752970e 4655
6cdc0ccc
AM		 4656 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4657 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
0752970e
NC		 4658 }
4659 else
4660 {
4661 unsigned long indx;
4662 struct elf_link_hash_entry *h;
4663
4664 /* An external symbol. */
4665 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4666 h = elf_sym_hashes (abfd)[indx];
4667 BFD_ASSERT (h != NULL);
4668 if (h->root.type == bfd_link_hash_defined
4669 || h->root.type == bfd_link_hash_defweak)
4670 targetsec = h->root.u.def.section;
4671 else
4672 targetsec = NULL;
4673 }
4674
4675 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
4676 memset (p + 4, 0, 8);
4677 if (targetsec != NULL)
f075ee0c 4678 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
0752970e 4679 }
c3668558 4680
6cdc0ccc
AM		 4681 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4682 free (isymbuf);
4683 if (internal_relocs != NULL
4684 && elf_section_data (datasec)->relocs != internal_relocs)
4685 free (internal_relocs);
b34976b6 4686 return TRUE;
0752970e
NC		 4687
4688error_return:
6cdc0ccc
AM		 4689 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4690 free (isymbuf);
4691 if (internal_relocs != NULL
4692 && elf_section_data (datasec)->relocs != internal_relocs)
4693 free (internal_relocs);
b34976b6 4694 return FALSE;
0752970e
NC		 4695}
4696
7fb9f789
NC		 4697/* Set target options. */
4698
4699void
4700bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling)
4701{
4702 struct elf_m68k_link_hash_table *htab;
b1345da3
MR		 4703 bfd_boolean use_neg_got_offsets_p;
4704 bfd_boolean allow_multigot_p;
4705 bfd_boolean local_gp_p;
7fb9f789
NC		 4706
4707 switch (got_handling)
4708 {
4709 case 0:
4710 /* --got=single. */
b1345da3
MR		 4711 local_gp_p = FALSE;
4712 use_neg_got_offsets_p = FALSE;
4713 allow_multigot_p = FALSE;
7fb9f789
NC		 4714 break;
4715
4716 case 1:
4717 /* --got=negative. */
b1345da3
MR		 4718 local_gp_p = TRUE;
4719 use_neg_got_offsets_p = TRUE;
4720 allow_multigot_p = FALSE;
7fb9f789
NC		 4721 break;
4722
4723 case 2:
4724 /* --got=multigot. */
b1345da3
MR		 4725 local_gp_p = TRUE;
4726 use_neg_got_offsets_p = TRUE;
4727 allow_multigot_p = TRUE;
7fb9f789
NC		 4728 break;
4729
4730 default:
4731 BFD_ASSERT (FALSE);
b1345da3
MR		 4732 return;
4733 }
4734
4735 htab = elf_m68k_hash_table (info);
4736 if (htab != NULL)
4737 {
4738 htab->local_gp_p = local_gp_p;
4739 htab->use_neg_got_offsets_p = use_neg_got_offsets_p;
4740 htab->allow_multigot_p = allow_multigot_p;
7fb9f789
NC		 4741 }
4742}
4743
aa91b392 4744static enum elf_reloc_type_class
7e612e98
AM		 4745elf32_m68k_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4746 const asection *rel_sec ATTRIBUTE_UNUSED,
4747 const Elf_Internal_Rela *rela)
aa91b392 4748{
f51e552e 4749 switch ((int) ELF32_R_TYPE (rela->r_info))
aa91b392
AS		 4750 {
4751 case R_68K_RELATIVE:
4752 return reloc_class_relative;
4753 case R_68K_JMP_SLOT:
4754 return reloc_class_plt;
4755 case R_68K_COPY:
4756 return reloc_class_copy;
4757 default:
4758 return reloc_class_normal;
4759 }
4760}
4761
1715e0e3
AS		 4762/* Return address for Ith PLT stub in section PLT, for relocation REL
4763 or (bfd_vma) -1 if it should not be included. */
4764
4765static bfd_vma
4766elf_m68k_plt_sym_val (bfd_vma i, const asection *plt,
4767 const arelent *rel ATTRIBUTE_UNUSED)
4768{
cc3e26be 4769 return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size;
1715e0e3
AS		 4770}
4771
8bbeae90
AS		 4772/* Support for core dump NOTE sections. */
4773
4774static bfd_boolean
4775elf_m68k_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
4776{
4777 int offset;
4778 size_t size;
4779
4780 switch (note->descsz)
4781 {
4782 default:
4783 return FALSE;
4784
4785 case 154: /* Linux/m68k */
4786 /* pr_cursig */
228e534f 4787 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
8bbeae90
AS		 4788
4789 /* pr_pid */
228e534f 4790 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
8bbeae90
AS		 4791
4792 /* pr_reg */
4793 offset = 70;
4794 size = 80;
4795
4796 break;
4797 }
4798
4799 /* Make a ".reg/999" section. */
4800 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4801 size, note->descpos + offset);
4802}
4803
4804static bfd_boolean
4805elf_m68k_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4806{
4807 switch (note->descsz)
4808 {
4809 default:
4810 return FALSE;
4811
4812 case 124: /* Linux/m68k elf_prpsinfo. */
228e534f 4813 elf_tdata (abfd)->core->pid
8bbeae90 4814 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 4815 elf_tdata (abfd)->core->program
8bbeae90 4816 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 4817 elf_tdata (abfd)->core->command
8bbeae90
AS		 4818 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4819 }
4820
4821 /* Note that for some reason, a spurious space is tacked
4822 onto the end of the args in some (at least one anyway)
4823 implementations, so strip it off if it exists. */
4824 {
228e534f 4825 char *command = elf_tdata (abfd)->core->command;
8bbeae90
AS		 4826 int n = strlen (command);
4827
4828 if (n > 0 && command[n - 1] == ' ')
4829 command[n - 1] = '\0';
4830 }
4831
4832 return TRUE;
4833}
4834
f6ec89e7
AS		 4835/* Hook called by the linker routine which adds symbols from an object
4836 file. */
4837
4838static bfd_boolean
4839elf_m68k_add_symbol_hook (bfd *abfd,
4840 struct bfd_link_info *info,
4841 Elf_Internal_Sym *sym,
4842 const char **namep ATTRIBUTE_UNUSED,
4843 flagword *flagsp ATTRIBUTE_UNUSED,
4844 asection **secp ATTRIBUTE_UNUSED,
4845 bfd_vma *valp ATTRIBUTE_UNUSED)
4846{
f1885d1e
AM		 4847 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4848 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
4849 && (abfd->flags & DYNAMIC) == 0
4850 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
13a2df29 4851 elf_tdata (info->output_bfd)->has_gnu_symbols = elf_gnu_symbol_any;
f6ec89e7
AS		 4852
4853 return TRUE;
4854}
4855
6d00b590 4856#define TARGET_BIG_SYM m68k_elf32_vec
252b5132
RH		 4857#define TARGET_BIG_NAME "elf32-m68k"
4858#define ELF_MACHINE_CODE EM_68K
4859#define ELF_MAXPAGESIZE 0x2000
4860#define elf_backend_create_dynamic_sections \
4861 _bfd_elf_create_dynamic_sections
4862#define bfd_elf32_bfd_link_hash_table_create \
4863 elf_m68k_link_hash_table_create
7fb9f789 4864#define bfd_elf32_bfd_final_link bfd_elf_final_link
252b5132
RH		 4865
4866#define elf_backend_check_relocs elf_m68k_check_relocs
cc3e26be
RS		 4867#define elf_backend_always_size_sections \
4868 elf_m68k_always_size_sections
252b5132
RH		 4869#define elf_backend_adjust_dynamic_symbol \
4870 elf_m68k_adjust_dynamic_symbol
4871#define elf_backend_size_dynamic_sections \
4872 elf_m68k_size_dynamic_sections
fc9f1df9 4873#define elf_backend_final_write_processing elf_m68k_final_write_processing
74541ad4 4874#define elf_backend_init_index_section _bfd_elf_init_1_index_section
252b5132
RH		 4875#define elf_backend_relocate_section elf_m68k_relocate_section
4876#define elf_backend_finish_dynamic_symbol \
4877 elf_m68k_finish_dynamic_symbol
4878#define elf_backend_finish_dynamic_sections \
4879 elf_m68k_finish_dynamic_sections
4880#define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
4881#define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook
7fb9f789 4882#define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol
9e1281c7
CM		 4883#define bfd_elf32_bfd_merge_private_bfd_data \
4884 elf32_m68k_merge_private_bfd_data
4885#define bfd_elf32_bfd_set_private_flags \
4886 elf32_m68k_set_private_flags
4887#define bfd_elf32_bfd_print_private_bfd_data \
4888 elf32_m68k_print_private_bfd_data
aa91b392 4889#define elf_backend_reloc_type_class elf32_m68k_reloc_type_class
1715e0e3 4890#define elf_backend_plt_sym_val elf_m68k_plt_sym_val
266abb8f 4891#define elf_backend_object_p elf32_m68k_object_p
8bbeae90
AS		 4892#define elf_backend_grok_prstatus elf_m68k_grok_prstatus
4893#define elf_backend_grok_psinfo elf_m68k_grok_psinfo
f6ec89e7 4894#define elf_backend_add_symbol_hook elf_m68k_add_symbol_hook
9e1281c7 4895
252b5132 4896#define elf_backend_can_gc_sections 1
51b64d56 4897#define elf_backend_can_refcount 1
252b5132
RH		 4898#define elf_backend_want_got_plt 1
4899#define elf_backend_plt_readonly 1
4900#define elf_backend_want_plt_sym 0
4901#define elf_backend_got_header_size 12
b491616a 4902#define elf_backend_rela_normal 1
252b5132
RH		 4903
4904#include "elf32-target.h"
GDB Binutils - Deliverables
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