elf32-m68k.c revision 1.1.1.9 1 1.1 christos /* Motorola 68k series support for 32-bit ELF
2 1.1.1.9 christos Copyright (C) 1993-2020 Free Software Foundation, Inc.
3 1.1 christos
4 1.1 christos This file is part of BFD, the Binary File Descriptor library.
5 1.1 christos
6 1.1 christos This program is free software; you can redistribute it and/or modify
7 1.1 christos it under the terms of the GNU General Public License as published by
8 1.1 christos the Free Software Foundation; either version 3 of the License, or
9 1.1 christos (at your option) any later version.
10 1.1 christos
11 1.1 christos This program is distributed in the hope that it will be useful,
12 1.1 christos but WITHOUT ANY WARRANTY; without even the implied warranty of
13 1.1 christos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 1.1 christos GNU General Public License for more details.
15 1.1 christos
16 1.1 christos You should have received a copy of the GNU General Public License
17 1.1 christos along with this program; if not, write to the Free Software
18 1.1 christos Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 1.1 christos MA 02110-1301, USA. */
20 1.1 christos
21 1.1 christos #include "sysdep.h"
22 1.1 christos #include "bfd.h"
23 1.1 christos #include "bfdlink.h"
24 1.1 christos #include "libbfd.h"
25 1.1 christos #include "elf-bfd.h"
26 1.1 christos #include "elf/m68k.h"
27 1.1 christos #include "opcode/m68k.h"
28 1.1.1.9 christos #include "cpu-m68k.h"
29 1.1.1.9 christos #include "elf32-m68k.h"
30 1.1 christos
31 1.1.1.2 christos static bfd_boolean
32 1.1.1.2 christos elf_m68k_discard_copies (struct elf_link_hash_entry *, void *);
33 1.1 christos
34 1.1.1.2 christos static reloc_howto_type howto_table[] =
35 1.1.1.2 christos {
36 1.1.1.8 christos HOWTO(R_68K_NONE, 0, 3, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE),
37 1.1.1.8 christos HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE),
38 1.1.1.8 christos HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE),
39 1.1.1.8 christos HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE),
40 1.1.1.8 christos HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE),
41 1.1.1.8 christos HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE),
42 1.1.1.8 christos HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE),
43 1.1.1.8 christos HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE),
44 1.1.1.8 christos HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE),
45 1.1.1.8 christos HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE),
46 1.1.1.8 christos HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE),
47 1.1.1.8 christos HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE),
48 1.1.1.8 christos HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE),
49 1.1.1.8 christos HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE),
50 1.1.1.8 christos HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE),
51 1.1.1.8 christos HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE),
52 1.1.1.8 christos HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE),
53 1.1.1.8 christos HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE),
54 1.1.1.8 christos HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE),
55 1.1.1.8 christos HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE),
56 1.1.1.8 christos 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),
57 1.1.1.8 christos 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),
58 1.1.1.8 christos HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE),
59 1.1 christos /* GNU extension to record C++ vtable hierarchy. */
60 1.1 christos HOWTO (R_68K_GNU_VTINHERIT, /* type */
61 1.1 christos 0, /* rightshift */
62 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
63 1.1 christos 0, /* bitsize */
64 1.1 christos FALSE, /* pc_relative */
65 1.1 christos 0, /* bitpos */
66 1.1 christos complain_overflow_dont, /* complain_on_overflow */
67 1.1 christos NULL, /* special_function */
68 1.1 christos "R_68K_GNU_VTINHERIT", /* name */
69 1.1 christos FALSE, /* partial_inplace */
70 1.1 christos 0, /* src_mask */
71 1.1 christos 0, /* dst_mask */
72 1.1 christos FALSE),
73 1.1 christos /* GNU extension to record C++ vtable member usage. */
74 1.1 christos HOWTO (R_68K_GNU_VTENTRY, /* type */
75 1.1 christos 0, /* rightshift */
76 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
77 1.1 christos 0, /* bitsize */
78 1.1 christos FALSE, /* pc_relative */
79 1.1 christos 0, /* bitpos */
80 1.1 christos complain_overflow_dont, /* complain_on_overflow */
81 1.1 christos _bfd_elf_rel_vtable_reloc_fn, /* special_function */
82 1.1 christos "R_68K_GNU_VTENTRY", /* name */
83 1.1 christos FALSE, /* partial_inplace */
84 1.1 christos 0, /* src_mask */
85 1.1 christos 0, /* dst_mask */
86 1.1 christos FALSE),
87 1.1 christos
88 1.1 christos /* TLS general dynamic variable reference. */
89 1.1 christos HOWTO (R_68K_TLS_GD32, /* type */
90 1.1 christos 0, /* rightshift */
91 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
92 1.1 christos 32, /* bitsize */
93 1.1 christos FALSE, /* pc_relative */
94 1.1 christos 0, /* bitpos */
95 1.1 christos complain_overflow_bitfield, /* complain_on_overflow */
96 1.1 christos bfd_elf_generic_reloc, /* special_function */
97 1.1 christos "R_68K_TLS_GD32", /* name */
98 1.1 christos FALSE, /* partial_inplace */
99 1.1 christos 0, /* src_mask */
100 1.1 christos 0xffffffff, /* dst_mask */
101 1.1 christos FALSE), /* pcrel_offset */
102 1.1 christos
103 1.1 christos HOWTO (R_68K_TLS_GD16, /* type */
104 1.1 christos 0, /* rightshift */
105 1.1 christos 1, /* size (0 = byte, 1 = short, 2 = long) */
106 1.1 christos 16, /* bitsize */
107 1.1 christos FALSE, /* pc_relative */
108 1.1 christos 0, /* bitpos */
109 1.1 christos complain_overflow_signed, /* complain_on_overflow */
110 1.1 christos bfd_elf_generic_reloc, /* special_function */
111 1.1 christos "R_68K_TLS_GD16", /* name */
112 1.1 christos FALSE, /* partial_inplace */
113 1.1 christos 0, /* src_mask */
114 1.1 christos 0x0000ffff, /* dst_mask */
115 1.1 christos FALSE), /* pcrel_offset */
116 1.1 christos
117 1.1 christos HOWTO (R_68K_TLS_GD8, /* type */
118 1.1 christos 0, /* rightshift */
119 1.1 christos 0, /* size (0 = byte, 1 = short, 2 = long) */
120 1.1 christos 8, /* bitsize */
121 1.1 christos FALSE, /* pc_relative */
122 1.1 christos 0, /* bitpos */
123 1.1 christos complain_overflow_signed, /* complain_on_overflow */
124 1.1 christos bfd_elf_generic_reloc, /* special_function */
125 1.1 christos "R_68K_TLS_GD8", /* name */
126 1.1 christos FALSE, /* partial_inplace */
127 1.1 christos 0, /* src_mask */
128 1.1 christos 0x000000ff, /* dst_mask */
129 1.1 christos FALSE), /* pcrel_offset */
130 1.1 christos
131 1.1 christos /* TLS local dynamic variable reference. */
132 1.1 christos HOWTO (R_68K_TLS_LDM32, /* type */
133 1.1 christos 0, /* rightshift */
134 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
135 1.1 christos 32, /* bitsize */
136 1.1 christos FALSE, /* pc_relative */
137 1.1 christos 0, /* bitpos */
138 1.1 christos complain_overflow_bitfield, /* complain_on_overflow */
139 1.1 christos bfd_elf_generic_reloc, /* special_function */
140 1.1 christos "R_68K_TLS_LDM32", /* name */
141 1.1 christos FALSE, /* partial_inplace */
142 1.1 christos 0, /* src_mask */
143 1.1 christos 0xffffffff, /* dst_mask */
144 1.1 christos FALSE), /* pcrel_offset */
145 1.1 christos
146 1.1 christos HOWTO (R_68K_TLS_LDM16, /* type */
147 1.1 christos 0, /* rightshift */
148 1.1 christos 1, /* size (0 = byte, 1 = short, 2 = long) */
149 1.1 christos 16, /* bitsize */
150 1.1 christos FALSE, /* pc_relative */
151 1.1 christos 0, /* bitpos */
152 1.1 christos complain_overflow_signed, /* complain_on_overflow */
153 1.1 christos bfd_elf_generic_reloc, /* special_function */
154 1.1 christos "R_68K_TLS_LDM16", /* name */
155 1.1 christos FALSE, /* partial_inplace */
156 1.1 christos 0, /* src_mask */
157 1.1 christos 0x0000ffff, /* dst_mask */
158 1.1 christos FALSE), /* pcrel_offset */
159 1.1 christos
160 1.1 christos HOWTO (R_68K_TLS_LDM8, /* type */
161 1.1 christos 0, /* rightshift */
162 1.1 christos 0, /* size (0 = byte, 1 = short, 2 = long) */
163 1.1 christos 8, /* bitsize */
164 1.1 christos FALSE, /* pc_relative */
165 1.1 christos 0, /* bitpos */
166 1.1 christos complain_overflow_signed, /* complain_on_overflow */
167 1.1 christos bfd_elf_generic_reloc, /* special_function */
168 1.1 christos "R_68K_TLS_LDM8", /* name */
169 1.1 christos FALSE, /* partial_inplace */
170 1.1 christos 0, /* src_mask */
171 1.1 christos 0x000000ff, /* dst_mask */
172 1.1 christos FALSE), /* pcrel_offset */
173 1.1 christos
174 1.1 christos HOWTO (R_68K_TLS_LDO32, /* type */
175 1.1 christos 0, /* rightshift */
176 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
177 1.1 christos 32, /* bitsize */
178 1.1 christos FALSE, /* pc_relative */
179 1.1 christos 0, /* bitpos */
180 1.1 christos complain_overflow_bitfield, /* complain_on_overflow */
181 1.1 christos bfd_elf_generic_reloc, /* special_function */
182 1.1 christos "R_68K_TLS_LDO32", /* name */
183 1.1 christos FALSE, /* partial_inplace */
184 1.1 christos 0, /* src_mask */
185 1.1 christos 0xffffffff, /* dst_mask */
186 1.1 christos FALSE), /* pcrel_offset */
187 1.1 christos
188 1.1 christos HOWTO (R_68K_TLS_LDO16, /* type */
189 1.1 christos 0, /* rightshift */
190 1.1 christos 1, /* size (0 = byte, 1 = short, 2 = long) */
191 1.1 christos 16, /* bitsize */
192 1.1 christos FALSE, /* pc_relative */
193 1.1 christos 0, /* bitpos */
194 1.1 christos complain_overflow_signed, /* complain_on_overflow */
195 1.1 christos bfd_elf_generic_reloc, /* special_function */
196 1.1 christos "R_68K_TLS_LDO16", /* name */
197 1.1 christos FALSE, /* partial_inplace */
198 1.1 christos 0, /* src_mask */
199 1.1 christos 0x0000ffff, /* dst_mask */
200 1.1 christos FALSE), /* pcrel_offset */
201 1.1 christos
202 1.1 christos HOWTO (R_68K_TLS_LDO8, /* type */
203 1.1 christos 0, /* rightshift */
204 1.1 christos 0, /* size (0 = byte, 1 = short, 2 = long) */
205 1.1 christos 8, /* bitsize */
206 1.1 christos FALSE, /* pc_relative */
207 1.1 christos 0, /* bitpos */
208 1.1 christos complain_overflow_signed, /* complain_on_overflow */
209 1.1 christos bfd_elf_generic_reloc, /* special_function */
210 1.1 christos "R_68K_TLS_LDO8", /* name */
211 1.1 christos FALSE, /* partial_inplace */
212 1.1 christos 0, /* src_mask */
213 1.1 christos 0x000000ff, /* dst_mask */
214 1.1 christos FALSE), /* pcrel_offset */
215 1.1 christos
216 1.1 christos /* TLS initial execution variable reference. */
217 1.1 christos HOWTO (R_68K_TLS_IE32, /* type */
218 1.1 christos 0, /* rightshift */
219 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
220 1.1 christos 32, /* bitsize */
221 1.1 christos FALSE, /* pc_relative */
222 1.1 christos 0, /* bitpos */
223 1.1 christos complain_overflow_bitfield, /* complain_on_overflow */
224 1.1 christos bfd_elf_generic_reloc, /* special_function */
225 1.1 christos "R_68K_TLS_IE32", /* name */
226 1.1 christos FALSE, /* partial_inplace */
227 1.1 christos 0, /* src_mask */
228 1.1 christos 0xffffffff, /* dst_mask */
229 1.1 christos FALSE), /* pcrel_offset */
230 1.1 christos
231 1.1 christos HOWTO (R_68K_TLS_IE16, /* type */
232 1.1 christos 0, /* rightshift */
233 1.1 christos 1, /* size (0 = byte, 1 = short, 2 = long) */
234 1.1 christos 16, /* bitsize */
235 1.1 christos FALSE, /* pc_relative */
236 1.1 christos 0, /* bitpos */
237 1.1 christos complain_overflow_signed, /* complain_on_overflow */
238 1.1 christos bfd_elf_generic_reloc, /* special_function */
239 1.1 christos "R_68K_TLS_IE16", /* name */
240 1.1 christos FALSE, /* partial_inplace */
241 1.1 christos 0, /* src_mask */
242 1.1 christos 0x0000ffff, /* dst_mask */
243 1.1 christos FALSE), /* pcrel_offset */
244 1.1 christos
245 1.1 christos HOWTO (R_68K_TLS_IE8, /* type */
246 1.1 christos 0, /* rightshift */
247 1.1 christos 0, /* size (0 = byte, 1 = short, 2 = long) */
248 1.1 christos 8, /* bitsize */
249 1.1 christos FALSE, /* pc_relative */
250 1.1 christos 0, /* bitpos */
251 1.1 christos complain_overflow_signed, /* complain_on_overflow */
252 1.1 christos bfd_elf_generic_reloc, /* special_function */
253 1.1 christos "R_68K_TLS_IE8", /* name */
254 1.1 christos FALSE, /* partial_inplace */
255 1.1 christos 0, /* src_mask */
256 1.1 christos 0x000000ff, /* dst_mask */
257 1.1 christos FALSE), /* pcrel_offset */
258 1.1 christos
259 1.1 christos /* TLS local execution variable reference. */
260 1.1 christos HOWTO (R_68K_TLS_LE32, /* type */
261 1.1 christos 0, /* rightshift */
262 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
263 1.1 christos 32, /* bitsize */
264 1.1 christos FALSE, /* pc_relative */
265 1.1 christos 0, /* bitpos */
266 1.1 christos complain_overflow_bitfield, /* complain_on_overflow */
267 1.1 christos bfd_elf_generic_reloc, /* special_function */
268 1.1 christos "R_68K_TLS_LE32", /* name */
269 1.1 christos FALSE, /* partial_inplace */
270 1.1 christos 0, /* src_mask */
271 1.1 christos 0xffffffff, /* dst_mask */
272 1.1 christos FALSE), /* pcrel_offset */
273 1.1 christos
274 1.1 christos HOWTO (R_68K_TLS_LE16, /* type */
275 1.1 christos 0, /* rightshift */
276 1.1 christos 1, /* size (0 = byte, 1 = short, 2 = long) */
277 1.1 christos 16, /* bitsize */
278 1.1 christos FALSE, /* pc_relative */
279 1.1 christos 0, /* bitpos */
280 1.1 christos complain_overflow_signed, /* complain_on_overflow */
281 1.1 christos bfd_elf_generic_reloc, /* special_function */
282 1.1 christos "R_68K_TLS_LE16", /* name */
283 1.1 christos FALSE, /* partial_inplace */
284 1.1 christos 0, /* src_mask */
285 1.1 christos 0x0000ffff, /* dst_mask */
286 1.1 christos FALSE), /* pcrel_offset */
287 1.1 christos
288 1.1 christos HOWTO (R_68K_TLS_LE8, /* type */
289 1.1 christos 0, /* rightshift */
290 1.1 christos 0, /* size (0 = byte, 1 = short, 2 = long) */
291 1.1 christos 8, /* bitsize */
292 1.1 christos FALSE, /* pc_relative */
293 1.1 christos 0, /* bitpos */
294 1.1 christos complain_overflow_signed, /* complain_on_overflow */
295 1.1 christos bfd_elf_generic_reloc, /* special_function */
296 1.1 christos "R_68K_TLS_LE8", /* name */
297 1.1 christos FALSE, /* partial_inplace */
298 1.1 christos 0, /* src_mask */
299 1.1 christos 0x000000ff, /* dst_mask */
300 1.1 christos FALSE), /* pcrel_offset */
301 1.1 christos
302 1.1 christos /* TLS GD/LD dynamic relocations. */
303 1.1 christos HOWTO (R_68K_TLS_DTPMOD32, /* type */
304 1.1 christos 0, /* rightshift */
305 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
306 1.1 christos 32, /* bitsize */
307 1.1 christos FALSE, /* pc_relative */
308 1.1 christos 0, /* bitpos */
309 1.1 christos complain_overflow_dont, /* complain_on_overflow */
310 1.1 christos bfd_elf_generic_reloc, /* special_function */
311 1.1 christos "R_68K_TLS_DTPMOD32", /* name */
312 1.1 christos FALSE, /* partial_inplace */
313 1.1 christos 0, /* src_mask */
314 1.1 christos 0xffffffff, /* dst_mask */
315 1.1 christos FALSE), /* pcrel_offset */
316 1.1 christos
317 1.1 christos HOWTO (R_68K_TLS_DTPREL32, /* type */
318 1.1 christos 0, /* rightshift */
319 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
320 1.1 christos 32, /* bitsize */
321 1.1 christos FALSE, /* pc_relative */
322 1.1 christos 0, /* bitpos */
323 1.1 christos complain_overflow_dont, /* complain_on_overflow */
324 1.1 christos bfd_elf_generic_reloc, /* special_function */
325 1.1 christos "R_68K_TLS_DTPREL32", /* name */
326 1.1 christos FALSE, /* partial_inplace */
327 1.1 christos 0, /* src_mask */
328 1.1 christos 0xffffffff, /* dst_mask */
329 1.1 christos FALSE), /* pcrel_offset */
330 1.1 christos
331 1.1 christos HOWTO (R_68K_TLS_TPREL32, /* type */
332 1.1 christos 0, /* rightshift */
333 1.1 christos 2, /* size (0 = byte, 1 = short, 2 = long) */
334 1.1 christos 32, /* bitsize */
335 1.1 christos FALSE, /* pc_relative */
336 1.1 christos 0, /* bitpos */
337 1.1 christos complain_overflow_dont, /* complain_on_overflow */
338 1.1 christos bfd_elf_generic_reloc, /* special_function */
339 1.1 christos "R_68K_TLS_TPREL32", /* name */
340 1.1 christos FALSE, /* partial_inplace */
341 1.1 christos 0, /* src_mask */
342 1.1 christos 0xffffffff, /* dst_mask */
343 1.1 christos FALSE), /* pcrel_offset */
344 1.1 christos };
345 1.1 christos
346 1.1.1.8 christos static bfd_boolean
347 1.1 christos rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
348 1.1 christos {
349 1.1 christos unsigned int indx = ELF32_R_TYPE (dst->r_info);
350 1.1 christos
351 1.1 christos if (indx >= (unsigned int) R_68K_max)
352 1.1 christos {
353 1.1.1.7 christos /* xgettext:c-format */
354 1.1.1.8 christos _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
355 1.1.1.8 christos abfd, indx);
356 1.1.1.8 christos bfd_set_error (bfd_error_bad_value);
357 1.1.1.8 christos return FALSE;
358 1.1 christos }
359 1.1 christos cache_ptr->howto = &howto_table[indx];
360 1.1.1.8 christos return TRUE;
361 1.1 christos }
362 1.1 christos
363 1.1 christos #define elf_info_to_howto rtype_to_howto
364 1.1 christos
365 1.1 christos static const struct
366 1.1 christos {
367 1.1 christos bfd_reloc_code_real_type bfd_val;
368 1.1 christos int elf_val;
369 1.1 christos }
370 1.1 christos reloc_map[] =
371 1.1 christos {
372 1.1 christos { BFD_RELOC_NONE, R_68K_NONE },
373 1.1 christos { BFD_RELOC_32, R_68K_32 },
374 1.1 christos { BFD_RELOC_16, R_68K_16 },
375 1.1 christos { BFD_RELOC_8, R_68K_8 },
376 1.1 christos { BFD_RELOC_32_PCREL, R_68K_PC32 },
377 1.1 christos { BFD_RELOC_16_PCREL, R_68K_PC16 },
378 1.1 christos { BFD_RELOC_8_PCREL, R_68K_PC8 },
379 1.1 christos { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
380 1.1 christos { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
381 1.1 christos { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
382 1.1 christos { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
383 1.1 christos { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
384 1.1 christos { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
385 1.1 christos { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
386 1.1 christos { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
387 1.1 christos { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
388 1.1 christos { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
389 1.1 christos { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
390 1.1 christos { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
391 1.1 christos { BFD_RELOC_NONE, R_68K_COPY },
392 1.1 christos { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
393 1.1 christos { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
394 1.1 christos { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
395 1.1 christos { BFD_RELOC_CTOR, R_68K_32 },
396 1.1 christos { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
397 1.1 christos { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
398 1.1 christos { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 },
399 1.1 christos { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 },
400 1.1 christos { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 },
401 1.1 christos { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 },
402 1.1 christos { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 },
403 1.1 christos { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 },
404 1.1 christos { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 },
405 1.1 christos { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 },
406 1.1 christos { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 },
407 1.1 christos { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 },
408 1.1 christos { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 },
409 1.1 christos { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 },
410 1.1 christos { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 },
411 1.1 christos { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 },
412 1.1 christos { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 },
413 1.1 christos };
414 1.1 christos
415 1.1 christos static reloc_howto_type *
416 1.1.1.2 christos reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
417 1.1.1.2 christos bfd_reloc_code_real_type code)
418 1.1 christos {
419 1.1 christos unsigned int i;
420 1.1 christos for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
421 1.1 christos {
422 1.1 christos if (reloc_map[i].bfd_val == code)
423 1.1 christos return &howto_table[reloc_map[i].elf_val];
424 1.1 christos }
425 1.1 christos return 0;
426 1.1 christos }
427 1.1 christos
428 1.1 christos static reloc_howto_type *
429 1.1 christos reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
430 1.1 christos {
431 1.1 christos unsigned int i;
432 1.1 christos
433 1.1 christos for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
434 1.1 christos if (howto_table[i].name != NULL
435 1.1 christos && strcasecmp (howto_table[i].name, r_name) == 0)
436 1.1 christos return &howto_table[i];
437 1.1 christos
438 1.1 christos return NULL;
439 1.1 christos }
440 1.1 christos
441 1.1 christos #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
442 1.1 christos #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
443 1.1 christos #define ELF_ARCH bfd_arch_m68k
444 1.1 christos #define ELF_TARGET_ID M68K_ELF_DATA
445 1.1 christos
446 1.1 christos /* Functions for the m68k ELF linker. */
448 1.1 christos
449 1.1 christos /* The name of the dynamic interpreter. This is put in the .interp
450 1.1 christos section. */
451 1.1 christos
452 1.1 christos #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
453 1.1 christos
454 1.1 christos /* Describes one of the various PLT styles. */
455 1.1 christos
456 1.1 christos struct elf_m68k_plt_info
457 1.1 christos {
458 1.1 christos /* The size of each PLT entry. */
459 1.1 christos bfd_vma size;
460 1.1 christos
461 1.1 christos /* The template for the first PLT entry. */
462 1.1 christos const bfd_byte *plt0_entry;
463 1.1 christos
464 1.1 christos /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations.
465 1.1 christos The comments by each member indicate the value that the relocation
466 1.1 christos is against. */
467 1.1 christos struct {
468 1.1 christos unsigned int got4; /* .got + 4 */
469 1.1 christos unsigned int got8; /* .got + 8 */
470 1.1 christos } plt0_relocs;
471 1.1 christos
472 1.1 christos /* The template for a symbol's PLT entry. */
473 1.1 christos const bfd_byte *symbol_entry;
474 1.1 christos
475 1.1 christos /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations.
476 1.1 christos The comments by each member indicate the value that the relocation
477 1.1 christos is against. */
478 1.1 christos struct {
479 1.1 christos unsigned int got; /* the symbol's .got.plt entry */
480 1.1 christos unsigned int plt; /* .plt */
481 1.1 christos } symbol_relocs;
482 1.1 christos
483 1.1 christos /* The offset of the resolver stub from the start of SYMBOL_ENTRY.
484 1.1 christos The stub starts with "move.l #relocoffset,%d0". */
485 1.1 christos bfd_vma symbol_resolve_entry;
486 1.1 christos };
487 1.1 christos
488 1.1 christos /* The size in bytes of an entry in the procedure linkage table. */
489 1.1 christos
490 1.1 christos #define PLT_ENTRY_SIZE 20
491 1.1 christos
492 1.1 christos /* The first entry in a procedure linkage table looks like this. See
493 1.1 christos the SVR4 ABI m68k supplement to see how this works. */
494 1.1 christos
495 1.1 christos static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
496 1.1 christos {
497 1.1 christos 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
498 1.1 christos 0, 0, 0, 2, /* + (.got + 4) - . */
499 1.1 christos 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
500 1.1 christos 0, 0, 0, 2, /* + (.got + 8) - . */
501 1.1 christos 0, 0, 0, 0 /* pad out to 20 bytes. */
502 1.1 christos };
503 1.1 christos
504 1.1 christos /* Subsequent entries in a procedure linkage table look like this. */
505 1.1 christos
506 1.1 christos static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
507 1.1 christos {
508 1.1 christos 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
509 1.1 christos 0, 0, 0, 2, /* + (.got.plt entry) - . */
510 1.1 christos 0x2f, 0x3c, /* move.l #offset,-(%sp) */
511 1.1 christos 0, 0, 0, 0, /* + reloc index */
512 1.1 christos 0x60, 0xff, /* bra.l .plt */
513 1.1 christos 0, 0, 0, 0 /* + .plt - . */
514 1.1 christos };
515 1.1.1.7 christos
516 1.1.1.7 christos static const struct elf_m68k_plt_info elf_m68k_plt_info =
517 1.1 christos {
518 1.1 christos PLT_ENTRY_SIZE,
519 1.1 christos elf_m68k_plt0_entry, { 4, 12 },
520 1.1 christos elf_m68k_plt_entry, { 4, 16 }, 8
521 1.1 christos };
522 1.1 christos
523 1.1 christos #define ISAB_PLT_ENTRY_SIZE 24
524 1.1 christos
525 1.1 christos static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] =
526 1.1.1.8 christos {
527 1.1.1.8 christos 0x20, 0x3c, /* move.l #offset,%d0 */
528 1.1 christos 0, 0, 0, 0, /* + (.got + 4) - . */
529 1.1.1.8 christos 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */
530 1.1.1.8 christos 0x20, 0x3c, /* move.l #offset,%d0 */
531 1.1 christos 0, 0, 0, 0, /* + (.got + 8) - . */
532 1.1.1.8 christos 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
533 1.1 christos 0x4e, 0xd0, /* jmp (%a0) */
534 1.1 christos 0x4e, 0x71 /* nop */
535 1.1 christos };
536 1.1 christos
537 1.1 christos /* Subsequent entries in a procedure linkage table look like this. */
538 1.1 christos
539 1.1 christos static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] =
540 1.1.1.8 christos {
541 1.1.1.8 christos 0x20, 0x3c, /* move.l #offset,%d0 */
542 1.1 christos 0, 0, 0, 0, /* + (.got.plt entry) - . */
543 1.1.1.8 christos 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
544 1.1.1.8 christos 0x4e, 0xd0, /* jmp (%a0) */
545 1.1.1.8 christos 0x2f, 0x3c, /* move.l #offset,-(%sp) */
546 1.1.1.8 christos 0, 0, 0, 0, /* + reloc index */
547 1.1.1.8 christos 0x60, 0xff, /* bra.l .plt */
548 1.1 christos 0, 0, 0, 0 /* + .plt - . */
549 1.1 christos };
550 1.1.1.7 christos
551 1.1.1.7 christos static const struct elf_m68k_plt_info elf_isab_plt_info =
552 1.1 christos {
553 1.1 christos ISAB_PLT_ENTRY_SIZE,
554 1.1 christos elf_isab_plt0_entry, { 2, 12 },
555 1.1 christos elf_isab_plt_entry, { 2, 20 }, 12
556 1.1 christos };
557 1.1 christos
558 1.1 christos #define ISAC_PLT_ENTRY_SIZE 24
559 1.1 christos
560 1.1 christos static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] =
561 1.1 christos {
562 1.1 christos 0x20, 0x3c, /* move.l #offset,%d0 */
563 1.1 christos 0, 0, 0, 0, /* replaced with .got + 4 - . */
564 1.1 christos 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
565 1.1 christos 0x20, 0x3c, /* move.l #offset,%d0 */
566 1.1 christos 0, 0, 0, 0, /* replaced with .got + 8 - . */
567 1.1 christos 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
568 1.1 christos 0x4e, 0xd0, /* jmp (%a0) */
569 1.1 christos 0x4e, 0x71 /* nop */
570 1.1 christos };
571 1.1 christos
572 1.1 christos /* Subsequent entries in a procedure linkage table look like this. */
573 1.1 christos
574 1.1 christos static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] =
575 1.1 christos {
576 1.1 christos 0x20, 0x3c, /* move.l #offset,%d0 */
577 1.1 christos 0, 0, 0, 0, /* replaced with (.got entry) - . */
578 1.1 christos 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
579 1.1 christos 0x4e, 0xd0, /* jmp (%a0) */
580 1.1 christos 0x2f, 0x3c, /* move.l #offset,-(%sp) */
581 1.1 christos 0, 0, 0, 0, /* replaced with offset into relocation table */
582 1.1.1.8 christos 0x61, 0xff, /* bsr.l .plt */
583 1.1 christos 0, 0, 0, 0 /* replaced with .plt - . */
584 1.1 christos };
585 1.1.1.7 christos
586 1.1.1.7 christos static const struct elf_m68k_plt_info elf_isac_plt_info =
587 1.1 christos {
588 1.1 christos ISAC_PLT_ENTRY_SIZE,
589 1.1 christos elf_isac_plt0_entry, { 2, 12},
590 1.1 christos elf_isac_plt_entry, { 2, 20 }, 12
591 1.1 christos };
592 1.1 christos
593 1.1 christos #define CPU32_PLT_ENTRY_SIZE 24
594 1.1 christos /* Procedure linkage table entries for the cpu32 */
595 1.1 christos static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] =
596 1.1 christos {
597 1.1.1.8 christos 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
598 1.1 christos 0, 0, 0, 2, /* + (.got + 4) - . */
599 1.1.1.8 christos 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
600 1.1.1.8 christos 0, 0, 0, 2, /* + (.got + 8) - . */
601 1.1.1.8 christos 0x4e, 0xd1, /* jmp %a1@ */
602 1.1 christos 0, 0, 0, 0, /* pad out to 24 bytes. */
603 1.1 christos 0, 0
604 1.1 christos };
605 1.1 christos
606 1.1 christos static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] =
607 1.1 christos {
608 1.1.1.8 christos 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
609 1.1.1.8 christos 0, 0, 0, 2, /* + (.got.plt entry) - . */
610 1.1.1.8 christos 0x4e, 0xd1, /* jmp %a1@ */
611 1.1.1.8 christos 0x2f, 0x3c, /* move.l #offset,-(%sp) */
612 1.1.1.8 christos 0, 0, 0, 0, /* + reloc index */
613 1.1.1.8 christos 0x60, 0xff, /* bra.l .plt */
614 1.1 christos 0, 0, 0, 0, /* + .plt - . */
615 1.1 christos 0, 0
616 1.1 christos };
617 1.1.1.7 christos
618 1.1.1.7 christos static const struct elf_m68k_plt_info elf_cpu32_plt_info =
619 1.1 christos {
620 1.1 christos CPU32_PLT_ENTRY_SIZE,
621 1.1 christos elf_cpu32_plt0_entry, { 4, 12 },
622 1.1 christos elf_cpu32_plt_entry, { 4, 18 }, 10
623 1.1 christos };
624 1.1 christos
625 1.1 christos /* The m68k linker needs to keep track of the number of relocs that it
626 1.1 christos decides to copy in check_relocs for each symbol. This is so that it
627 1.1 christos can discard PC relative relocs if it doesn't need them when linking
628 1.1 christos with -Bsymbolic. We store the information in a field extending the
629 1.1 christos regular ELF linker hash table. */
630 1.1 christos
631 1.1 christos /* This structure keeps track of the number of PC relative relocs we have
632 1.1 christos copied for a given symbol. */
633 1.1 christos
634 1.1 christos struct elf_m68k_pcrel_relocs_copied
635 1.1 christos {
636 1.1 christos /* Next section. */
637 1.1 christos struct elf_m68k_pcrel_relocs_copied *next;
638 1.1 christos /* A section in dynobj. */
639 1.1 christos asection *section;
640 1.1 christos /* Number of relocs copied in this section. */
641 1.1 christos bfd_size_type count;
642 1.1 christos };
643 1.1 christos
644 1.1 christos /* Forward declaration. */
645 1.1 christos struct elf_m68k_got_entry;
646 1.1 christos
647 1.1 christos /* m68k ELF linker hash entry. */
648 1.1 christos
649 1.1 christos struct elf_m68k_link_hash_entry
650 1.1 christos {
651 1.1 christos struct elf_link_hash_entry root;
652 1.1 christos
653 1.1 christos /* Number of PC relative relocs copied for this symbol. */
654 1.1 christos struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
655 1.1 christos
656 1.1 christos /* Key to got_entries. */
657 1.1 christos unsigned long got_entry_key;
658 1.1 christos
659 1.1 christos /* List of GOT entries for this symbol. This list is build during
660 1.1 christos offset finalization and is used within elf_m68k_finish_dynamic_symbol
661 1.1 christos to traverse all GOT entries for a particular symbol.
662 1.1 christos
663 1.1 christos ??? We could've used root.got.glist field instead, but having
664 1.1 christos a separate field is cleaner. */
665 1.1 christos struct elf_m68k_got_entry *glist;
666 1.1 christos };
667 1.1 christos
668 1.1 christos #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
669 1.1 christos
670 1.1 christos /* Key part of GOT entry in hashtable. */
671 1.1 christos struct elf_m68k_got_entry_key
672 1.1 christos {
673 1.1 christos /* BFD in which this symbol was defined. NULL for global symbols. */
674 1.1 christos const bfd *bfd;
675 1.1 christos
676 1.1 christos /* Symbol index. Either local symbol index or h->got_entry_key. */
677 1.1 christos unsigned long symndx;
678 1.1 christos
679 1.1 christos /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32},
680 1.1 christos R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}.
681 1.1 christos
682 1.1 christos From perspective of hashtable key, only elf_m68k_got_reloc_type (type)
683 1.1 christos matters. That is, we distinguish between, say, R_68K_GOT16O
684 1.1 christos and R_68K_GOT32O when allocating offsets, but they are considered to be
685 1.1 christos the same when searching got->entries. */
686 1.1 christos enum elf_m68k_reloc_type type;
687 1.1 christos };
688 1.1 christos
689 1.1 christos /* Size of the GOT offset suitable for relocation. */
690 1.1 christos enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST };
691 1.1 christos
692 1.1 christos /* Entry of the GOT. */
693 1.1 christos struct elf_m68k_got_entry
694 1.1 christos {
695 1.1 christos /* GOT entries are put into a got->entries hashtable. This is the key. */
696 1.1 christos struct elf_m68k_got_entry_key key_;
697 1.1 christos
698 1.1 christos /* GOT entry data. We need s1 before offset finalization and s2 after. */
699 1.1 christos union
700 1.1 christos {
701 1.1 christos struct
702 1.1.1.8 christos {
703 1.1 christos /* Number of times this entry is referenced. */
704 1.1 christos bfd_vma refcount;
705 1.1 christos } s1;
706 1.1 christos
707 1.1 christos struct
708 1.1 christos {
709 1.1.1.8 christos /* Offset from the start of .got section. To calculate offset relative
710 1.1 christos to GOT pointer one should subtract got->offset from this value. */
711 1.1 christos bfd_vma offset;
712 1.1 christos
713 1.1 christos /* Pointer to the next GOT entry for this global symbol.
714 1.1 christos Symbols have at most one entry in one GOT, but might
715 1.1 christos have entries in more than one GOT.
716 1.1 christos Root of this list is h->glist.
717 1.1 christos NULL for local symbols. */
718 1.1 christos struct elf_m68k_got_entry *next;
719 1.1 christos } s2;
720 1.1 christos } u;
721 1.1 christos };
722 1.1 christos
723 1.1 christos /* Return representative type for relocation R_TYPE.
724 1.1 christos This is used to avoid enumerating many relocations in comparisons,
725 1.1 christos switches etc. */
726 1.1 christos
727 1.1 christos static enum elf_m68k_reloc_type
728 1.1 christos elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type)
729 1.1 christos {
730 1.1 christos switch (r_type)
731 1.1 christos {
732 1.1 christos /* In most cases R_68K_GOTx relocations require the very same
733 1.1 christos handling as R_68K_GOT32O relocation. In cases when we need
734 1.1 christos to distinguish between the two, we use explicitly compare against
735 1.1 christos r_type. */
736 1.1 christos case R_68K_GOT32:
737 1.1 christos case R_68K_GOT16:
738 1.1 christos case R_68K_GOT8:
739 1.1 christos case R_68K_GOT32O:
740 1.1 christos case R_68K_GOT16O:
741 1.1 christos case R_68K_GOT8O:
742 1.1 christos return R_68K_GOT32O;
743 1.1 christos
744 1.1 christos case R_68K_TLS_GD32:
745 1.1 christos case R_68K_TLS_GD16:
746 1.1 christos case R_68K_TLS_GD8:
747 1.1 christos return R_68K_TLS_GD32;
748 1.1 christos
749 1.1 christos case R_68K_TLS_LDM32:
750 1.1 christos case R_68K_TLS_LDM16:
751 1.1 christos case R_68K_TLS_LDM8:
752 1.1 christos return R_68K_TLS_LDM32;
753 1.1 christos
754 1.1 christos case R_68K_TLS_IE32:
755 1.1 christos case R_68K_TLS_IE16:
756 1.1 christos case R_68K_TLS_IE8:
757 1.1 christos return R_68K_TLS_IE32;
758 1.1 christos
759 1.1 christos default:
760 1.1 christos BFD_ASSERT (FALSE);
761 1.1 christos return 0;
762 1.1 christos }
763 1.1 christos }
764 1.1 christos
765 1.1 christos /* Return size of the GOT entry offset for relocation R_TYPE. */
766 1.1 christos
767 1.1 christos static enum elf_m68k_got_offset_size
768 1.1 christos elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type)
769 1.1 christos {
770 1.1 christos switch (r_type)
771 1.1 christos {
772 1.1 christos case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8:
773 1.1 christos case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32:
774 1.1 christos case R_68K_TLS_IE32:
775 1.1 christos return R_32;
776 1.1 christos
777 1.1 christos case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16:
778 1.1 christos case R_68K_TLS_IE16:
779 1.1 christos return R_16;
780 1.1 christos
781 1.1 christos case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8:
782 1.1 christos case R_68K_TLS_IE8:
783 1.1 christos return R_8;
784 1.1 christos
785 1.1 christos default:
786 1.1 christos BFD_ASSERT (FALSE);
787 1.1 christos return 0;
788 1.1 christos }
789 1.1 christos }
790 1.1 christos
791 1.1 christos /* Return number of GOT entries we need to allocate in GOT for
792 1.1 christos relocation R_TYPE. */
793 1.1 christos
794 1.1 christos static bfd_vma
795 1.1 christos elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type)
796 1.1 christos {
797 1.1 christos switch (elf_m68k_reloc_got_type (r_type))
798 1.1 christos {
799 1.1 christos case R_68K_GOT32O:
800 1.1 christos case R_68K_TLS_IE32:
801 1.1 christos return 1;
802 1.1 christos
803 1.1 christos case R_68K_TLS_GD32:
804 1.1 christos case R_68K_TLS_LDM32:
805 1.1 christos return 2;
806 1.1 christos
807 1.1 christos default:
808 1.1 christos BFD_ASSERT (FALSE);
809 1.1 christos return 0;
810 1.1 christos }
811 1.1 christos }
812 1.1 christos
813 1.1 christos /* Return TRUE if relocation R_TYPE is a TLS one. */
814 1.1 christos
815 1.1 christos static bfd_boolean
816 1.1 christos elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type)
817 1.1 christos {
818 1.1 christos switch (r_type)
819 1.1 christos {
820 1.1 christos case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8:
821 1.1 christos case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8:
822 1.1 christos case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8:
823 1.1 christos case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8:
824 1.1 christos case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8:
825 1.1 christos case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32:
826 1.1 christos return TRUE;
827 1.1 christos
828 1.1 christos default:
829 1.1 christos return FALSE;
830 1.1 christos }
831 1.1 christos }
832 1.1 christos
833 1.1 christos /* Data structure representing a single GOT. */
834 1.1 christos struct elf_m68k_got
835 1.1 christos {
836 1.1 christos /* Hashtable of 'struct elf_m68k_got_entry's.
837 1.1 christos Starting size of this table is the maximum number of
838 1.1 christos R_68K_GOT8O entries. */
839 1.1 christos htab_t entries;
840 1.1 christos
841 1.1 christos /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require
842 1.1 christos several GOT slots.
843 1.1 christos
844 1.1 christos n_slots[R_8] is the count of R_8 slots in this GOT.
845 1.1 christos n_slots[R_16] is the cumulative count of R_8 and R_16 slots
846 1.1 christos in this GOT.
847 1.1 christos n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots
848 1.1 christos in this GOT. This is the total number of slots. */
849 1.1 christos bfd_vma n_slots[R_LAST];
850 1.1 christos
851 1.1 christos /* Number of local (entry->key_.h == NULL) slots in this GOT.
852 1.1 christos This is only used to properly calculate size of .rela.got section;
853 1.1 christos see elf_m68k_partition_multi_got. */
854 1.1 christos bfd_vma local_n_slots;
855 1.1 christos
856 1.1 christos /* Offset of this GOT relative to beginning of .got section. */
857 1.1 christos bfd_vma offset;
858 1.1 christos };
859 1.1 christos
860 1.1 christos /* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */
861 1.1 christos struct elf_m68k_bfd2got_entry
862 1.1 christos {
863 1.1 christos /* BFD. */
864 1.1 christos const bfd *bfd;
865 1.1 christos
866 1.1 christos /* Assigned GOT. Before partitioning multi-GOT each BFD has its own
867 1.1 christos GOT structure. After partitioning several BFD's might [and often do]
868 1.1 christos share a single GOT. */
869 1.1 christos struct elf_m68k_got *got;
870 1.1 christos };
871 1.1 christos
872 1.1 christos /* The main data structure holding all the pieces. */
873 1.1 christos struct elf_m68k_multi_got
874 1.1 christos {
875 1.1 christos /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry
876 1.1 christos here, then it doesn't need a GOT (this includes the case of a BFD
877 1.1 christos having an empty GOT).
878 1.1 christos
879 1.1 christos ??? This hashtable can be replaced by an array indexed by bfd->id. */
880 1.1 christos htab_t bfd2got;
881 1.1 christos
882 1.1 christos /* Next symndx to assign a global symbol.
883 1.1 christos h->got_entry_key is initialized from this counter. */
884 1.1 christos unsigned long global_symndx;
885 1.1 christos };
886 1.1 christos
887 1.1 christos /* m68k ELF linker hash table. */
888 1.1 christos
889 1.1 christos struct elf_m68k_link_hash_table
890 1.1 christos {
891 1.1 christos struct elf_link_hash_table root;
892 1.1 christos
893 1.1 christos /* The PLT format used by this link, or NULL if the format has not
894 1.1 christos yet been chosen. */
895 1.1 christos const struct elf_m68k_plt_info *plt_info;
896 1.1 christos
897 1.1 christos /* True, if GP is loaded within each function which uses it.
898 1.1 christos Set to TRUE when GOT negative offsets or multi-GOT is enabled. */
899 1.1 christos bfd_boolean local_gp_p;
900 1.1 christos
901 1.1 christos /* Switch controlling use of negative offsets to double the size of GOTs. */
902 1.1 christos bfd_boolean use_neg_got_offsets_p;
903 1.1 christos
904 1.1 christos /* Switch controlling generation of multiple GOTs. */
905 1.1 christos bfd_boolean allow_multigot_p;
906 1.1 christos
907 1.1 christos /* Multi-GOT data structure. */
908 1.1 christos struct elf_m68k_multi_got multi_got_;
909 1.1 christos };
910 1.1 christos
911 1.1 christos /* Get the m68k ELF linker hash table from a link_info structure. */
912 1.1 christos
913 1.1.1.9 christos #define elf_m68k_hash_table(p) \
914 1.1.1.9 christos ((is_elf_hash_table ((p)->hash) \
915 1.1.1.9 christos && elf_hash_table_id (elf_hash_table (p)) == M68K_ELF_DATA) \
916 1.1 christos ? (struct elf_m68k_link_hash_table *) (p)->hash : NULL)
917 1.1 christos
918 1.1 christos /* Shortcut to multi-GOT data. */
919 1.1 christos #define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_)
920 1.1 christos
921 1.1 christos /* Create an entry in an m68k ELF linker hash table. */
922 1.1 christos
923 1.1 christos static struct bfd_hash_entry *
924 1.1 christos elf_m68k_link_hash_newfunc (struct bfd_hash_entry *entry,
925 1.1 christos struct bfd_hash_table *table,
926 1.1 christos const char *string)
927 1.1 christos {
928 1.1 christos struct bfd_hash_entry *ret = entry;
929 1.1 christos
930 1.1 christos /* Allocate the structure if it has not already been allocated by a
931 1.1 christos subclass. */
932 1.1 christos if (ret == NULL)
933 1.1 christos ret = bfd_hash_allocate (table,
934 1.1 christos sizeof (struct elf_m68k_link_hash_entry));
935 1.1 christos if (ret == NULL)
936 1.1 christos return ret;
937 1.1 christos
938 1.1 christos /* Call the allocation method of the superclass. */
939 1.1 christos ret = _bfd_elf_link_hash_newfunc (ret, table, string);
940 1.1 christos if (ret != NULL)
941 1.1 christos {
942 1.1 christos elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL;
943 1.1 christos elf_m68k_hash_entry (ret)->got_entry_key = 0;
944 1.1 christos elf_m68k_hash_entry (ret)->glist = NULL;
945 1.1 christos }
946 1.1 christos
947 1.1 christos return ret;
948 1.1 christos }
949 1.1.1.4 christos
950 1.1.1.4 christos /* Destroy an m68k ELF linker hash table. */
951 1.1.1.4 christos
952 1.1.1.4 christos static void
953 1.1.1.4 christos elf_m68k_link_hash_table_free (bfd *obfd)
954 1.1.1.4 christos {
955 1.1.1.4 christos struct elf_m68k_link_hash_table *htab;
956 1.1.1.4 christos
957 1.1.1.4 christos htab = (struct elf_m68k_link_hash_table *) obfd->link.hash;
958 1.1.1.4 christos
959 1.1.1.4 christos if (htab->multi_got_.bfd2got != NULL)
960 1.1.1.4 christos {
961 1.1.1.4 christos htab_delete (htab->multi_got_.bfd2got);
962 1.1.1.4 christos htab->multi_got_.bfd2got = NULL;
963 1.1.1.4 christos }
964 1.1.1.4 christos _bfd_elf_link_hash_table_free (obfd);
965 1.1.1.4 christos }
966 1.1 christos
967 1.1 christos /* Create an m68k ELF linker hash table. */
968 1.1 christos
969 1.1 christos static struct bfd_link_hash_table *
970 1.1 christos elf_m68k_link_hash_table_create (bfd *abfd)
971 1.1 christos {
972 1.1.1.9 christos struct elf_m68k_link_hash_table *ret;
973 1.1 christos size_t amt = sizeof (struct elf_m68k_link_hash_table);
974 1.1.1.2 christos
975 1.1 christos ret = (struct elf_m68k_link_hash_table *) bfd_zmalloc (amt);
976 1.1 christos if (ret == (struct elf_m68k_link_hash_table *) NULL)
977 1.1 christos return NULL;
978 1.1 christos
979 1.1 christos if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
980 1.1 christos elf_m68k_link_hash_newfunc,
981 1.1 christos sizeof (struct elf_m68k_link_hash_entry),
982 1.1 christos M68K_ELF_DATA))
983 1.1 christos {
984 1.1 christos free (ret);
985 1.1 christos return NULL;
986 1.1.1.4 christos }
987 1.1 christos ret->root.root.hash_table_free = elf_m68k_link_hash_table_free;
988 1.1 christos
989 1.1 christos ret->multi_got_.global_symndx = 1;
990 1.1 christos
991 1.1 christos return &ret->root.root;
992 1.1 christos }
993 1.1 christos
994 1.1 christos /* Set the right machine number. */
995 1.1 christos
996 1.1 christos static bfd_boolean
997 1.1 christos elf32_m68k_object_p (bfd *abfd)
998 1.1 christos {
999 1.1 christos unsigned int mach = 0;
1000 1.1 christos unsigned features = 0;
1001 1.1 christos flagword eflags = elf_elfheader (abfd)->e_flags;
1002 1.1 christos
1003 1.1 christos if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1004 1.1 christos features |= m68000;
1005 1.1 christos else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1006 1.1 christos features |= cpu32;
1007 1.1 christos else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1008 1.1 christos features |= fido_a;
1009 1.1 christos else
1010 1.1 christos {
1011 1.1 christos switch (eflags & EF_M68K_CF_ISA_MASK)
1012 1.1 christos {
1013 1.1 christos case EF_M68K_CF_ISA_A_NODIV:
1014 1.1 christos features |= mcfisa_a;
1015 1.1 christos break;
1016 1.1 christos case EF_M68K_CF_ISA_A:
1017 1.1 christos features |= mcfisa_a|mcfhwdiv;
1018 1.1 christos break;
1019 1.1 christos case EF_M68K_CF_ISA_A_PLUS:
1020 1.1 christos features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp;
1021 1.1 christos break;
1022 1.1 christos case EF_M68K_CF_ISA_B_NOUSP:
1023 1.1 christos features |= mcfisa_a|mcfisa_b|mcfhwdiv;
1024 1.1 christos break;
1025 1.1 christos case EF_M68K_CF_ISA_B:
1026 1.1 christos features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp;
1027 1.1 christos break;
1028 1.1 christos case EF_M68K_CF_ISA_C:
1029 1.1 christos features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp;
1030 1.1 christos break;
1031 1.1 christos case EF_M68K_CF_ISA_C_NODIV:
1032 1.1 christos features |= mcfisa_a|mcfisa_c|mcfusp;
1033 1.1 christos break;
1034 1.1 christos }
1035 1.1 christos switch (eflags & EF_M68K_CF_MAC_MASK)
1036 1.1 christos {
1037 1.1 christos case EF_M68K_CF_MAC:
1038 1.1 christos features |= mcfmac;
1039 1.1 christos break;
1040 1.1 christos case EF_M68K_CF_EMAC:
1041 1.1 christos features |= mcfemac;
1042 1.1 christos break;
1043 1.1 christos }
1044 1.1 christos if (eflags & EF_M68K_CF_FLOAT)
1045 1.1 christos features |= cfloat;
1046 1.1 christos }
1047 1.1 christos
1048 1.1 christos mach = bfd_m68k_features_to_mach (features);
1049 1.1 christos bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach);
1050 1.1 christos
1051 1.1 christos return TRUE;
1052 1.1 christos }
1053 1.1 christos
1054 1.1 christos /* Somewhat reverse of elf32_m68k_object_p, this sets the e_flag
1055 1.1 christos field based on the machine number. */
1056 1.1.1.9 christos
1057 1.1.1.9 christos static bfd_boolean
1058 1.1 christos elf_m68k_final_write_processing (bfd *abfd)
1059 1.1 christos {
1060 1.1 christos int mach = bfd_get_mach (abfd);
1061 1.1 christos unsigned long e_flags = elf_elfheader (abfd)->e_flags;
1062 1.1 christos
1063 1.1 christos if (!e_flags)
1064 1.1 christos {
1065 1.1 christos unsigned int arch_mask;
1066 1.1 christos
1067 1.1 christos arch_mask = bfd_m68k_mach_to_features (mach);
1068 1.1 christos
1069 1.1 christos if (arch_mask & m68000)
1070 1.1 christos e_flags = EF_M68K_M68000;
1071 1.1 christos else if (arch_mask & cpu32)
1072 1.1 christos e_flags = EF_M68K_CPU32;
1073 1.1 christos else if (arch_mask & fido_a)
1074 1.1 christos e_flags = EF_M68K_FIDO;
1075 1.1 christos else
1076 1.1 christos {
1077 1.1 christos switch (arch_mask
1078 1.1 christos & (mcfisa_a | mcfisa_aa | mcfisa_b | mcfisa_c | mcfhwdiv | mcfusp))
1079 1.1 christos {
1080 1.1 christos case mcfisa_a:
1081 1.1 christos e_flags |= EF_M68K_CF_ISA_A_NODIV;
1082 1.1 christos break;
1083 1.1 christos case mcfisa_a | mcfhwdiv:
1084 1.1 christos e_flags |= EF_M68K_CF_ISA_A;
1085 1.1 christos break;
1086 1.1 christos case mcfisa_a | mcfisa_aa | mcfhwdiv | mcfusp:
1087 1.1 christos e_flags |= EF_M68K_CF_ISA_A_PLUS;
1088 1.1 christos break;
1089 1.1 christos case mcfisa_a | mcfisa_b | mcfhwdiv:
1090 1.1 christos e_flags |= EF_M68K_CF_ISA_B_NOUSP;
1091 1.1 christos break;
1092 1.1 christos case mcfisa_a | mcfisa_b | mcfhwdiv | mcfusp:
1093 1.1 christos e_flags |= EF_M68K_CF_ISA_B;
1094 1.1 christos break;
1095 1.1 christos case mcfisa_a | mcfisa_c | mcfhwdiv | mcfusp:
1096 1.1 christos e_flags |= EF_M68K_CF_ISA_C;
1097 1.1 christos break;
1098 1.1 christos case mcfisa_a | mcfisa_c | mcfusp:
1099 1.1 christos e_flags |= EF_M68K_CF_ISA_C_NODIV;
1100 1.1 christos break;
1101 1.1 christos }
1102 1.1 christos if (arch_mask & mcfmac)
1103 1.1 christos e_flags |= EF_M68K_CF_MAC;
1104 1.1 christos else if (arch_mask & mcfemac)
1105 1.1 christos e_flags |= EF_M68K_CF_EMAC;
1106 1.1 christos if (arch_mask & cfloat)
1107 1.1 christos e_flags |= EF_M68K_CF_FLOAT | EF_M68K_CFV4E;
1108 1.1 christos }
1109 1.1 christos elf_elfheader (abfd)->e_flags = e_flags;
1110 1.1.1.9 christos }
1111 1.1 christos return _bfd_elf_final_write_processing (abfd);
1112 1.1 christos }
1113 1.1 christos
1114 1.1 christos /* Keep m68k-specific flags in the ELF header. */
1115 1.1 christos
1116 1.1.1.2 christos static bfd_boolean
1117 1.1 christos elf32_m68k_set_private_flags (bfd *abfd, flagword flags)
1118 1.1 christos {
1119 1.1 christos elf_elfheader (abfd)->e_flags = flags;
1120 1.1 christos elf_flags_init (abfd) = TRUE;
1121 1.1 christos return TRUE;
1122 1.1 christos }
1123 1.1.1.9 christos
1124 1.1.1.9 christos /* Merge object attributes from IBFD into OBFD. Warn if
1125 1.1.1.9 christos there are conflicting attributes. */
1126 1.1.1.9 christos static bfd_boolean
1127 1.1.1.9 christos m68k_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
1128 1.1.1.9 christos {
1129 1.1.1.9 christos bfd *obfd = info->output_bfd;
1130 1.1.1.9 christos obj_attribute *in_attr, *in_attrs;
1131 1.1.1.9 christos obj_attribute *out_attr, *out_attrs;
1132 1.1.1.9 christos bfd_boolean ret = TRUE;
1133 1.1.1.9 christos
1134 1.1.1.9 christos in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
1135 1.1.1.9 christos out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
1136 1.1.1.9 christos
1137 1.1.1.9 christos in_attr = &in_attrs[Tag_GNU_M68K_ABI_FP];
1138 1.1.1.9 christos out_attr = &out_attrs[Tag_GNU_M68K_ABI_FP];
1139 1.1.1.9 christos
1140 1.1.1.9 christos if (in_attr->i != out_attr->i)
1141 1.1.1.9 christos {
1142 1.1.1.9 christos int in_fp = in_attr->i & 3;
1143 1.1.1.9 christos int out_fp = out_attr->i & 3;
1144 1.1.1.9 christos static bfd *last_fp;
1145 1.1.1.9 christos
1146 1.1.1.9 christos if (in_fp == 0)
1147 1.1.1.9 christos ;
1148 1.1.1.9 christos else if (out_fp == 0)
1149 1.1.1.9 christos {
1150 1.1.1.9 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
1151 1.1.1.9 christos out_attr->i ^= in_fp;
1152 1.1.1.9 christos last_fp = ibfd;
1153 1.1.1.9 christos }
1154 1.1.1.9 christos else if (out_fp == 1 && in_fp == 2)
1155 1.1.1.9 christos {
1156 1.1.1.9 christos _bfd_error_handler
1157 1.1.1.9 christos /* xgettext:c-format */
1158 1.1.1.9 christos (_("%pB uses hard float, %pB uses soft float"),
1159 1.1.1.9 christos last_fp, ibfd);
1160 1.1.1.9 christos ret = FALSE;
1161 1.1.1.9 christos }
1162 1.1.1.9 christos else if (out_fp == 2 && in_fp == 1)
1163 1.1.1.9 christos {
1164 1.1.1.9 christos _bfd_error_handler
1165 1.1.1.9 christos /* xgettext:c-format */
1166 1.1.1.9 christos (_("%pB uses hard float, %pB uses soft float"),
1167 1.1.1.9 christos ibfd, last_fp);
1168 1.1.1.9 christos ret = FALSE;
1169 1.1.1.9 christos }
1170 1.1.1.9 christos }
1171 1.1.1.9 christos
1172 1.1.1.9 christos if (!ret)
1173 1.1.1.9 christos {
1174 1.1.1.9 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
1175 1.1.1.9 christos bfd_set_error (bfd_error_bad_value);
1176 1.1.1.9 christos return FALSE;
1177 1.1.1.9 christos }
1178 1.1.1.9 christos
1179 1.1.1.9 christos /* Merge Tag_compatibility attributes and any common GNU ones. */
1180 1.1.1.9 christos return _bfd_elf_merge_object_attributes (ibfd, info);
1181 1.1.1.9 christos }
1182 1.1 christos
1183 1.1 christos /* Merge backend specific data from an object file to the output
1184 1.1 christos object file when linking. */
1185 1.1.1.7 christos static bfd_boolean
1186 1.1 christos elf32_m68k_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
1187 1.1.1.7 christos {
1188 1.1 christos bfd *obfd = info->output_bfd;
1189 1.1 christos flagword out_flags;
1190 1.1 christos flagword in_flags;
1191 1.1 christos flagword out_isa;
1192 1.1 christos flagword in_isa;
1193 1.1 christos const bfd_arch_info_type *arch_info;
1194 1.1.1.9 christos
1195 1.1 christos if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1196 1.1.1.9 christos || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1197 1.1.1.9 christos /* PR 24523: For non-ELF files do not try to merge any private
1198 1.1.1.9 christos data, but also do not prevent the link from succeeding. */
1199 1.1 christos return TRUE;
1200 1.1 christos
1201 1.1 christos /* Get the merged machine. This checks for incompatibility between
1202 1.1 christos Coldfire & non-Coldfire flags, incompability between different
1203 1.1 christos Coldfire ISAs, and incompability between different MAC types. */
1204 1.1 christos arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE);
1205 1.1 christos if (!arch_info)
1206 1.1 christos return FALSE;
1207 1.1 christos
1208 1.1 christos bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach);
1209 1.1.1.9 christos
1210 1.1.1.9 christos if (!m68k_elf_merge_obj_attributes (ibfd, info))
1211 1.1.1.9 christos return FALSE;
1212 1.1 christos
1213 1.1 christos in_flags = elf_elfheader (ibfd)->e_flags;
1214 1.1 christos if (!elf_flags_init (obfd))
1215 1.1 christos {
1216 1.1 christos elf_flags_init (obfd) = TRUE;
1217 1.1 christos out_flags = in_flags;
1218 1.1 christos }
1219 1.1 christos else
1220 1.1 christos {
1221 1.1 christos out_flags = elf_elfheader (obfd)->e_flags;
1222 1.1 christos unsigned int variant_mask;
1223 1.1 christos
1224 1.1 christos if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1225 1.1 christos variant_mask = 0;
1226 1.1 christos else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1227 1.1 christos variant_mask = 0;
1228 1.1 christos else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1229 1.1 christos variant_mask = 0;
1230 1.1 christos else
1231 1.1 christos variant_mask = EF_M68K_CF_ISA_MASK;
1232 1.1 christos
1233 1.1 christos in_isa = (in_flags & variant_mask);
1234 1.1 christos out_isa = (out_flags & variant_mask);
1235 1.1 christos if (in_isa > out_isa)
1236 1.1 christos out_flags ^= in_isa ^ out_isa;
1237 1.1 christos if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32
1238 1.1 christos && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1239 1.1 christos || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO
1240 1.1 christos && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32))
1241 1.1 christos out_flags = EF_M68K_FIDO;
1242 1.1 christos else
1243 1.1 christos out_flags |= in_flags ^ in_isa;
1244 1.1 christos }
1245 1.1 christos elf_elfheader (obfd)->e_flags = out_flags;
1246 1.1 christos
1247 1.1 christos return TRUE;
1248 1.1 christos }
1249 1.1 christos
1250 1.1 christos /* Display the flags field. */
1251 1.1 christos
1252 1.1 christos static bfd_boolean
1253 1.1 christos elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr)
1254 1.1 christos {
1255 1.1 christos FILE *file = (FILE *) ptr;
1256 1.1 christos flagword eflags = elf_elfheader (abfd)->e_flags;
1257 1.1 christos
1258 1.1 christos BFD_ASSERT (abfd != NULL && ptr != NULL);
1259 1.1 christos
1260 1.1 christos /* Print normal ELF private data. */
1261 1.1 christos _bfd_elf_print_private_bfd_data (abfd, ptr);
1262 1.1 christos
1263 1.1 christos /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
1264 1.1 christos
1265 1.1 christos /* xgettext:c-format */
1266 1.1 christos fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
1267 1.1 christos
1268 1.1 christos if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1269 1.1 christos fprintf (file, " [m68000]");
1270 1.1 christos else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1271 1.1 christos fprintf (file, " [cpu32]");
1272 1.1 christos else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1273 1.1 christos fprintf (file, " [fido]");
1274 1.1 christos else
1275 1.1 christos {
1276 1.1 christos if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E)
1277 1.1 christos fprintf (file, " [cfv4e]");
1278 1.1 christos
1279 1.1 christos if (eflags & EF_M68K_CF_ISA_MASK)
1280 1.1 christos {
1281 1.1 christos char const *isa = _("unknown");
1282 1.1 christos char const *mac = _("unknown");
1283 1.1 christos char const *additional = "";
1284 1.1 christos
1285 1.1 christos switch (eflags & EF_M68K_CF_ISA_MASK)
1286 1.1 christos {
1287 1.1 christos case EF_M68K_CF_ISA_A_NODIV:
1288 1.1 christos isa = "A";
1289 1.1 christos additional = " [nodiv]";
1290 1.1 christos break;
1291 1.1 christos case EF_M68K_CF_ISA_A:
1292 1.1 christos isa = "A";
1293 1.1 christos break;
1294 1.1 christos case EF_M68K_CF_ISA_A_PLUS:
1295 1.1 christos isa = "A+";
1296 1.1 christos break;
1297 1.1 christos case EF_M68K_CF_ISA_B_NOUSP:
1298 1.1 christos isa = "B";
1299 1.1 christos additional = " [nousp]";
1300 1.1 christos break;
1301 1.1 christos case EF_M68K_CF_ISA_B:
1302 1.1 christos isa = "B";
1303 1.1 christos break;
1304 1.1 christos case EF_M68K_CF_ISA_C:
1305 1.1 christos isa = "C";
1306 1.1 christos break;
1307 1.1 christos case EF_M68K_CF_ISA_C_NODIV:
1308 1.1 christos isa = "C";
1309 1.1 christos additional = " [nodiv]";
1310 1.1 christos break;
1311 1.1 christos }
1312 1.1 christos fprintf (file, " [isa %s]%s", isa, additional);
1313 1.1 christos
1314 1.1 christos if (eflags & EF_M68K_CF_FLOAT)
1315 1.1 christos fprintf (file, " [float]");
1316 1.1 christos
1317 1.1 christos switch (eflags & EF_M68K_CF_MAC_MASK)
1318 1.1 christos {
1319 1.1 christos case 0:
1320 1.1 christos mac = NULL;
1321 1.1 christos break;
1322 1.1 christos case EF_M68K_CF_MAC:
1323 1.1 christos mac = "mac";
1324 1.1 christos break;
1325 1.1 christos case EF_M68K_CF_EMAC:
1326 1.1 christos mac = "emac";
1327 1.1 christos break;
1328 1.1 christos case EF_M68K_CF_EMAC_B:
1329 1.1 christos mac = "emac_b";
1330 1.1 christos break;
1331 1.1 christos }
1332 1.1 christos if (mac)
1333 1.1 christos fprintf (file, " [%s]", mac);
1334 1.1 christos }
1335 1.1 christos }
1336 1.1 christos
1337 1.1 christos fputc ('\n', file);
1338 1.1 christos
1339 1.1 christos return TRUE;
1340 1.1 christos }
1341 1.1 christos
1342 1.1 christos /* Multi-GOT support implementation design:
1343 1.1 christos
1344 1.1 christos Multi-GOT starts in check_relocs hook. There we scan all
1345 1.1 christos relocations of a BFD and build a local GOT (struct elf_m68k_got)
1346 1.1 christos for it. If a single BFD appears to require too many GOT slots with
1347 1.1 christos R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification
1348 1.1 christos to user.
1349 1.1 christos After check_relocs has been invoked for each input BFD, we have
1350 1.1 christos constructed a GOT for each input BFD.
1351 1.1 christos
1352 1.1 christos To minimize total number of GOTs required for a particular output BFD
1353 1.1 christos (as some environments support only 1 GOT per output object) we try
1354 1.1 christos to merge some of the GOTs to share an offset space. Ideally [and in most
1355 1.1 christos cases] we end up with a single GOT. In cases when there are too many
1356 1.1 christos restricted relocations (e.g., R_68K_GOT16O relocations) we end up with
1357 1.1 christos several GOTs, assuming the environment can handle them.
1358 1.1 christos
1359 1.1 christos Partitioning is done in elf_m68k_partition_multi_got. We start with
1360 1.1 christos an empty GOT and traverse bfd2got hashtable putting got_entries from
1361 1.1 christos local GOTs to the new 'big' one. We do that by constructing an
1362 1.1 christos intermediate GOT holding all the entries the local GOT has and the big
1363 1.1 christos GOT lacks. Then we check if there is room in the big GOT to accomodate
1364 1.1 christos all the entries from diff. On success we add those entries to the big
1365 1.1 christos GOT; on failure we start the new 'big' GOT and retry the adding of
1366 1.1 christos entries from the local GOT. Note that this retry will always succeed as
1367 1.1 christos each local GOT doesn't overflow the limits. After partitioning we
1368 1.1 christos end up with each bfd assigned one of the big GOTs. GOT entries in the
1369 1.1 christos big GOTs are initialized with GOT offsets. Note that big GOTs are
1370 1.1 christos positioned consequently in program space and represent a single huge GOT
1371 1.1 christos to the outside world.
1372 1.1 christos
1373 1.1 christos After that we get to elf_m68k_relocate_section. There we
1374 1.1 christos adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol
1375 1.1 christos relocations to refer to appropriate [assigned to current input_bfd]
1376 1.1 christos big GOT.
1377 1.1 christos
1378 1.1 christos Notes:
1379 1.1 christos
1380 1.1 christos GOT entry type: We have several types of GOT entries.
1381 1.1 christos * R_8 type is used in entries for symbols that have at least one
1382 1.1 christos R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40
1383 1.1 christos such entries in one GOT.
1384 1.1 christos * R_16 type is used in entries for symbols that have at least one
1385 1.1 christos R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations.
1386 1.1 christos We can have at most 0x4000 such entries in one GOT.
1387 1.1 christos * R_32 type is used in all other cases. We can have as many
1388 1.1 christos such entries in one GOT as we'd like.
1389 1.1 christos When counting relocations we have to include the count of the smaller
1390 1.1 christos ranged relocations in the counts of the larger ranged ones in order
1391 1.1 christos to correctly detect overflow.
1392 1.1 christos
1393 1.1 christos Sorting the GOT: In each GOT starting offsets are assigned to
1394 1.1 christos R_8 entries, which are followed by R_16 entries, and
1395 1.1 christos R_32 entries go at the end. See finalize_got_offsets for details.
1396 1.1 christos
1397 1.1 christos Negative GOT offsets: To double usable offset range of GOTs we use
1398 1.1 christos negative offsets. As we assign entries with GOT offsets relative to
1399 1.1 christos start of .got section, the offset values are positive. They become
1400 1.1 christos negative only in relocate_section where got->offset value is
1401 1.1 christos subtracted from them.
1402 1.1 christos
1403 1.1 christos 3 special GOT entries: There are 3 special GOT entries used internally
1404 1.1 christos by loader. These entries happen to be placed to .got.plt section,
1405 1.1 christos so we don't do anything about them in multi-GOT support.
1406 1.1 christos
1407 1.1 christos Memory management: All data except for hashtables
1408 1.1 christos multi_got->bfd2got and got->entries are allocated on
1409 1.1 christos elf_hash_table (info)->dynobj bfd (for this reason we pass 'info'
1410 1.1 christos to most functions), so we don't need to care to free them. At the
1411 1.1 christos moment of allocation hashtables are being linked into main data
1412 1.1 christos structure (multi_got), all pieces of which are reachable from
1413 1.1 christos elf_m68k_multi_got (info). We deallocate them in
1414 1.1 christos elf_m68k_link_hash_table_free. */
1415 1.1 christos
1416 1.1 christos /* Initialize GOT. */
1417 1.1 christos
1418 1.1 christos static void
1419 1.1 christos elf_m68k_init_got (struct elf_m68k_got *got)
1420 1.1 christos {
1421 1.1 christos got->entries = NULL;
1422 1.1 christos got->n_slots[R_8] = 0;
1423 1.1 christos got->n_slots[R_16] = 0;
1424 1.1 christos got->n_slots[R_32] = 0;
1425 1.1 christos got->local_n_slots = 0;
1426 1.1 christos got->offset = (bfd_vma) -1;
1427 1.1 christos }
1428 1.1 christos
1429 1.1 christos /* Destruct GOT. */
1430 1.1 christos
1431 1.1 christos static void
1432 1.1 christos elf_m68k_clear_got (struct elf_m68k_got *got)
1433 1.1 christos {
1434 1.1 christos if (got->entries != NULL)
1435 1.1 christos {
1436 1.1 christos htab_delete (got->entries);
1437 1.1 christos got->entries = NULL;
1438 1.1 christos }
1439 1.1 christos }
1440 1.1 christos
1441 1.1 christos /* Create and empty GOT structure. INFO is the context where memory
1442 1.1 christos should be allocated. */
1443 1.1 christos
1444 1.1 christos static struct elf_m68k_got *
1445 1.1 christos elf_m68k_create_empty_got (struct bfd_link_info *info)
1446 1.1 christos {
1447 1.1 christos struct elf_m68k_got *got;
1448 1.1 christos
1449 1.1 christos got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got));
1450 1.1 christos if (got == NULL)
1451 1.1 christos return NULL;
1452 1.1 christos
1453 1.1 christos elf_m68k_init_got (got);
1454 1.1 christos
1455 1.1 christos return got;
1456 1.1 christos }
1457 1.1 christos
1458 1.1 christos /* Initialize KEY. */
1459 1.1 christos
1460 1.1 christos static void
1461 1.1 christos elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key,
1462 1.1 christos struct elf_link_hash_entry *h,
1463 1.1 christos const bfd *abfd, unsigned long symndx,
1464 1.1 christos enum elf_m68k_reloc_type reloc_type)
1465 1.1 christos {
1466 1.1 christos if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32)
1467 1.1 christos /* All TLS_LDM relocations share a single GOT entry. */
1468 1.1 christos {
1469 1.1 christos key->bfd = NULL;
1470 1.1 christos key->symndx = 0;
1471 1.1 christos }
1472 1.1 christos else if (h != NULL)
1473 1.1 christos /* Global symbols are identified with their got_entry_key. */
1474 1.1 christos {
1475 1.1 christos key->bfd = NULL;
1476 1.1 christos key->symndx = elf_m68k_hash_entry (h)->got_entry_key;
1477 1.1 christos BFD_ASSERT (key->symndx != 0);
1478 1.1 christos }
1479 1.1 christos else
1480 1.1 christos /* Local symbols are identified by BFD they appear in and symndx. */
1481 1.1 christos {
1482 1.1 christos key->bfd = abfd;
1483 1.1 christos key->symndx = symndx;
1484 1.1 christos }
1485 1.1 christos
1486 1.1 christos key->type = reloc_type;
1487 1.1 christos }
1488 1.1 christos
1489 1.1 christos /* Calculate hash of got_entry.
1490 1.1 christos ??? Is it good? */
1491 1.1 christos
1492 1.1 christos static hashval_t
1493 1.1 christos elf_m68k_got_entry_hash (const void *_entry)
1494 1.1 christos {
1495 1.1 christos const struct elf_m68k_got_entry_key *key;
1496 1.1 christos
1497 1.1 christos key = &((const struct elf_m68k_got_entry *) _entry)->key_;
1498 1.1 christos
1499 1.1 christos return (key->symndx
1500 1.1 christos + (key->bfd != NULL ? (int) key->bfd->id : -1)
1501 1.1 christos + elf_m68k_reloc_got_type (key->type));
1502 1.1 christos }
1503 1.1 christos
1504 1.1 christos /* Check if two got entries are equal. */
1505 1.1 christos
1506 1.1 christos static int
1507 1.1 christos elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2)
1508 1.1 christos {
1509 1.1 christos const struct elf_m68k_got_entry_key *key1;
1510 1.1 christos const struct elf_m68k_got_entry_key *key2;
1511 1.1 christos
1512 1.1 christos key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_;
1513 1.1 christos key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_;
1514 1.1 christos
1515 1.1 christos return (key1->bfd == key2->bfd
1516 1.1 christos && key1->symndx == key2->symndx
1517 1.1 christos && (elf_m68k_reloc_got_type (key1->type)
1518 1.1 christos == elf_m68k_reloc_got_type (key2->type)));
1519 1.1 christos }
1520 1.1 christos
1521 1.1 christos /* When using negative offsets, we allocate one extra R_8, one extra R_16
1522 1.1 christos and one extra R_32 slots to simplify handling of 2-slot entries during
1523 1.1 christos offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */
1524 1.1 christos
1525 1.1 christos /* Maximal number of R_8 slots in a single GOT. */
1526 1.1 christos #define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \
1527 1.1 christos (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1528 1.1 christos ? (0x40 - 1) \
1529 1.1 christos : 0x20)
1530 1.1 christos
1531 1.1 christos /* Maximal number of R_8 and R_16 slots in a single GOT. */
1532 1.1 christos #define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \
1533 1.1 christos (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1534 1.1 christos ? (0x4000 - 2) \
1535 1.1 christos : 0x2000)
1536 1.1 christos
1537 1.1 christos /* SEARCH - simply search the hashtable, don't insert new entries or fail when
1538 1.1 christos the entry cannot be found.
1539 1.1 christos FIND_OR_CREATE - search for an existing entry, but create new if there's
1540 1.1 christos no such.
1541 1.1 christos MUST_FIND - search for an existing entry and assert that it exist.
1542 1.1 christos MUST_CREATE - assert that there's no such entry and create new one. */
1543 1.1 christos enum elf_m68k_get_entry_howto
1544 1.1 christos {
1545 1.1 christos SEARCH,
1546 1.1 christos FIND_OR_CREATE,
1547 1.1 christos MUST_FIND,
1548 1.1 christos MUST_CREATE
1549 1.1 christos };
1550 1.1 christos
1551 1.1 christos /* Get or create (depending on HOWTO) entry with KEY in GOT.
1552 1.1 christos INFO is context in which memory should be allocated (can be NULL if
1553 1.1 christos HOWTO is SEARCH or MUST_FIND). */
1554 1.1 christos
1555 1.1 christos static struct elf_m68k_got_entry *
1556 1.1 christos elf_m68k_get_got_entry (struct elf_m68k_got *got,
1557 1.1 christos const struct elf_m68k_got_entry_key *key,
1558 1.1 christos enum elf_m68k_get_entry_howto howto,
1559 1.1 christos struct bfd_link_info *info)
1560 1.1 christos {
1561 1.1 christos struct elf_m68k_got_entry entry_;
1562 1.1 christos struct elf_m68k_got_entry *entry;
1563 1.1 christos void **ptr;
1564 1.1 christos
1565 1.1 christos BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1566 1.1 christos
1567 1.1 christos if (got->entries == NULL)
1568 1.1 christos /* This is the first entry in ABFD. Initialize hashtable. */
1569 1.1 christos {
1570 1.1 christos if (howto == SEARCH)
1571 1.1 christos return NULL;
1572 1.1 christos
1573 1.1 christos got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT
1574 1.1 christos (info),
1575 1.1 christos elf_m68k_got_entry_hash,
1576 1.1 christos elf_m68k_got_entry_eq, NULL);
1577 1.1 christos if (got->entries == NULL)
1578 1.1 christos {
1579 1.1 christos bfd_set_error (bfd_error_no_memory);
1580 1.1 christos return NULL;
1581 1.1 christos }
1582 1.1 christos }
1583 1.1 christos
1584 1.1.1.9 christos entry_.key_ = *key;
1585 1.1.1.9 christos ptr = htab_find_slot (got->entries, &entry_,
1586 1.1.1.9 christos (howto == SEARCH || howto == MUST_FIND ? NO_INSERT
1587 1.1 christos : INSERT));
1588 1.1 christos if (ptr == NULL)
1589 1.1 christos {
1590 1.1 christos if (howto == SEARCH)
1591 1.1 christos /* Entry not found. */
1592 1.1 christos return NULL;
1593 1.1.1.9 christos
1594 1.1.1.9 christos if (howto == MUST_FIND)
1595 1.1.1.9 christos abort ();
1596 1.1 christos
1597 1.1 christos /* We're out of memory. */
1598 1.1 christos bfd_set_error (bfd_error_no_memory);
1599 1.1 christos return NULL;
1600 1.1 christos }
1601 1.1 christos
1602 1.1 christos if (*ptr == NULL)
1603 1.1 christos /* We didn't find the entry and we're asked to create a new one. */
1604 1.1.1.9 christos {
1605 1.1.1.9 christos if (howto == MUST_FIND)
1606 1.1.1.9 christos abort ();
1607 1.1.1.9 christos
1608 1.1 christos BFD_ASSERT (howto != SEARCH);
1609 1.1 christos
1610 1.1 christos entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry));
1611 1.1 christos if (entry == NULL)
1612 1.1 christos return NULL;
1613 1.1 christos
1614 1.1 christos /* Initialize new entry. */
1615 1.1 christos entry->key_ = *key;
1616 1.1 christos
1617 1.1 christos entry->u.s1.refcount = 0;
1618 1.1 christos
1619 1.1 christos /* Mark the entry as not initialized. */
1620 1.1 christos entry->key_.type = R_68K_max;
1621 1.1 christos
1622 1.1 christos *ptr = entry;
1623 1.1 christos }
1624 1.1 christos else
1625 1.1 christos /* We found the entry. */
1626 1.1 christos {
1627 1.1 christos BFD_ASSERT (howto != MUST_CREATE);
1628 1.1 christos
1629 1.1 christos entry = *ptr;
1630 1.1 christos }
1631 1.1 christos
1632 1.1 christos return entry;
1633 1.1 christos }
1634 1.1 christos
1635 1.1 christos /* Update GOT counters when merging entry of WAS type with entry of NEW type.
1636 1.1 christos Return the value to which ENTRY's type should be set. */
1637 1.1 christos
1638 1.1 christos static enum elf_m68k_reloc_type
1639 1.1 christos elf_m68k_update_got_entry_type (struct elf_m68k_got *got,
1640 1.1 christos enum elf_m68k_reloc_type was,
1641 1.1 christos enum elf_m68k_reloc_type new_reloc)
1642 1.1 christos {
1643 1.1 christos enum elf_m68k_got_offset_size was_size;
1644 1.1 christos enum elf_m68k_got_offset_size new_size;
1645 1.1 christos bfd_vma n_slots;
1646 1.1 christos
1647 1.1 christos if (was == R_68K_max)
1648 1.1 christos /* The type of the entry is not initialized yet. */
1649 1.1 christos {
1650 1.1 christos /* Update all got->n_slots counters, including n_slots[R_32]. */
1651 1.1 christos was_size = R_LAST;
1652 1.1 christos
1653 1.1 christos was = new_reloc;
1654 1.1 christos }
1655 1.1 christos else
1656 1.1 christos {
1657 1.1 christos /* !!! We, probably, should emit an error rather then fail on assert
1658 1.1 christos in such a case. */
1659 1.1 christos BFD_ASSERT (elf_m68k_reloc_got_type (was)
1660 1.1 christos == elf_m68k_reloc_got_type (new_reloc));
1661 1.1 christos
1662 1.1 christos was_size = elf_m68k_reloc_got_offset_size (was);
1663 1.1 christos }
1664 1.1 christos
1665 1.1 christos new_size = elf_m68k_reloc_got_offset_size (new_reloc);
1666 1.1 christos n_slots = elf_m68k_reloc_got_n_slots (new_reloc);
1667 1.1 christos
1668 1.1 christos while (was_size > new_size)
1669 1.1 christos {
1670 1.1 christos --was_size;
1671 1.1 christos got->n_slots[was_size] += n_slots;
1672 1.1 christos }
1673 1.1 christos
1674 1.1 christos if (new_reloc > was)
1675 1.1 christos /* Relocations are ordered from bigger got offset size to lesser,
1676 1.1 christos so choose the relocation type with lesser offset size. */
1677 1.1 christos was = new_reloc;
1678 1.1 christos
1679 1.1 christos return was;
1680 1.1 christos }
1681 1.1 christos
1682 1.1 christos /* Add new or update existing entry to GOT.
1683 1.1 christos H, ABFD, TYPE and SYMNDX is data for the entry.
1684 1.1 christos INFO is a context where memory should be allocated. */
1685 1.1 christos
1686 1.1 christos static struct elf_m68k_got_entry *
1687 1.1 christos elf_m68k_add_entry_to_got (struct elf_m68k_got *got,
1688 1.1 christos struct elf_link_hash_entry *h,
1689 1.1 christos const bfd *abfd,
1690 1.1 christos enum elf_m68k_reloc_type reloc_type,
1691 1.1 christos unsigned long symndx,
1692 1.1 christos struct bfd_link_info *info)
1693 1.1 christos {
1694 1.1 christos struct elf_m68k_got_entry_key key_;
1695 1.1 christos struct elf_m68k_got_entry *entry;
1696 1.1 christos
1697 1.1 christos if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0)
1698 1.1 christos elf_m68k_hash_entry (h)->got_entry_key
1699 1.1 christos = elf_m68k_multi_got (info)->global_symndx++;
1700 1.1 christos
1701 1.1 christos elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type);
1702 1.1 christos
1703 1.1 christos entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info);
1704 1.1 christos if (entry == NULL)
1705 1.1 christos return NULL;
1706 1.1 christos
1707 1.1 christos /* Determine entry's type and update got->n_slots counters. */
1708 1.1 christos entry->key_.type = elf_m68k_update_got_entry_type (got,
1709 1.1 christos entry->key_.type,
1710 1.1 christos reloc_type);
1711 1.1 christos
1712 1.1 christos /* Update refcount. */
1713 1.1 christos ++entry->u.s1.refcount;
1714 1.1 christos
1715 1.1 christos if (entry->u.s1.refcount == 1)
1716 1.1 christos /* We see this entry for the first time. */
1717 1.1 christos {
1718 1.1 christos if (entry->key_.bfd != NULL)
1719 1.1 christos got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type);
1720 1.1 christos }
1721 1.1 christos
1722 1.1 christos BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
1723 1.1 christos
1724 1.1 christos if ((got->n_slots[R_8]
1725 1.1 christos > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1726 1.1 christos || (got->n_slots[R_16]
1727 1.1 christos > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1728 1.1 christos /* This BFD has too many relocation. */
1729 1.1 christos {
1730 1.1.1.7 christos if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1731 1.1.1.8 christos /* xgettext:c-format */
1732 1.1.1.8 christos _bfd_error_handler (_("%pB: GOT overflow: "
1733 1.1.1.7 christos "number of relocations with 8-bit "
1734 1.1.1.7 christos "offset > %d"),
1735 1.1.1.7 christos abfd,
1736 1.1 christos ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info));
1737 1.1.1.7 christos else
1738 1.1.1.8 christos /* xgettext:c-format */
1739 1.1.1.8 christos _bfd_error_handler (_("%pB: GOT overflow: "
1740 1.1.1.7 christos "number of relocations with 8- or 16-bit "
1741 1.1.1.7 christos "offset > %d"),
1742 1.1.1.7 christos abfd,
1743 1.1 christos ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info));
1744 1.1 christos
1745 1.1 christos return NULL;
1746 1.1 christos }
1747 1.1 christos
1748 1.1 christos return entry;
1749 1.1 christos }
1750 1.1 christos
1751 1.1 christos /* Compute the hash value of the bfd in a bfd2got hash entry. */
1752 1.1 christos
1753 1.1 christos static hashval_t
1754 1.1 christos elf_m68k_bfd2got_entry_hash (const void *entry)
1755 1.1 christos {
1756 1.1 christos const struct elf_m68k_bfd2got_entry *e;
1757 1.1 christos
1758 1.1 christos e = (const struct elf_m68k_bfd2got_entry *) entry;
1759 1.1 christos
1760 1.1 christos return e->bfd->id;
1761 1.1 christos }
1762 1.1 christos
1763 1.1 christos /* Check whether two hash entries have the same bfd. */
1764 1.1 christos
1765 1.1 christos static int
1766 1.1 christos elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2)
1767 1.1 christos {
1768 1.1 christos const struct elf_m68k_bfd2got_entry *e1;
1769 1.1 christos const struct elf_m68k_bfd2got_entry *e2;
1770 1.1 christos
1771 1.1 christos e1 = (const struct elf_m68k_bfd2got_entry *) entry1;
1772 1.1 christos e2 = (const struct elf_m68k_bfd2got_entry *) entry2;
1773 1.1 christos
1774 1.1 christos return e1->bfd == e2->bfd;
1775 1.1 christos }
1776 1.1 christos
1777 1.1 christos /* Destruct a bfd2got entry. */
1778 1.1 christos
1779 1.1 christos static void
1780 1.1 christos elf_m68k_bfd2got_entry_del (void *_entry)
1781 1.1 christos {
1782 1.1 christos struct elf_m68k_bfd2got_entry *entry;
1783 1.1 christos
1784 1.1 christos entry = (struct elf_m68k_bfd2got_entry *) _entry;
1785 1.1 christos
1786 1.1 christos BFD_ASSERT (entry->got != NULL);
1787 1.1 christos elf_m68k_clear_got (entry->got);
1788 1.1 christos }
1789 1.1 christos
1790 1.1 christos /* Find existing or create new (depending on HOWTO) bfd2got entry in
1791 1.1 christos MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where
1792 1.1 christos memory should be allocated. */
1793 1.1 christos
1794 1.1 christos static struct elf_m68k_bfd2got_entry *
1795 1.1 christos elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got,
1796 1.1 christos const bfd *abfd,
1797 1.1 christos enum elf_m68k_get_entry_howto howto,
1798 1.1 christos struct bfd_link_info *info)
1799 1.1 christos {
1800 1.1 christos struct elf_m68k_bfd2got_entry entry_;
1801 1.1 christos void **ptr;
1802 1.1 christos struct elf_m68k_bfd2got_entry *entry;
1803 1.1 christos
1804 1.1 christos BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1805 1.1 christos
1806 1.1 christos if (multi_got->bfd2got == NULL)
1807 1.1 christos /* This is the first GOT. Initialize bfd2got. */
1808 1.1 christos {
1809 1.1 christos if (howto == SEARCH)
1810 1.1 christos return NULL;
1811 1.1 christos
1812 1.1 christos multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash,
1813 1.1 christos elf_m68k_bfd2got_entry_eq,
1814 1.1 christos elf_m68k_bfd2got_entry_del);
1815 1.1 christos if (multi_got->bfd2got == NULL)
1816 1.1 christos {
1817 1.1 christos bfd_set_error (bfd_error_no_memory);
1818 1.1 christos return NULL;
1819 1.1 christos }
1820 1.1 christos }
1821 1.1 christos
1822 1.1.1.9 christos entry_.bfd = abfd;
1823 1.1.1.9 christos ptr = htab_find_slot (multi_got->bfd2got, &entry_,
1824 1.1.1.9 christos (howto == SEARCH || howto == MUST_FIND ? NO_INSERT
1825 1.1 christos : INSERT));
1826 1.1 christos if (ptr == NULL)
1827 1.1 christos {
1828 1.1 christos if (howto == SEARCH)
1829 1.1 christos /* Entry not found. */
1830 1.1 christos return NULL;
1831 1.1.1.9 christos
1832 1.1.1.9 christos if (howto == MUST_FIND)
1833 1.1.1.9 christos abort ();
1834 1.1 christos
1835 1.1 christos /* We're out of memory. */
1836 1.1 christos bfd_set_error (bfd_error_no_memory);
1837 1.1 christos return NULL;
1838 1.1 christos }
1839 1.1 christos
1840 1.1 christos if (*ptr == NULL)
1841 1.1 christos /* Entry was not found. Create new one. */
1842 1.1.1.9 christos {
1843 1.1.1.9 christos if (howto == MUST_FIND)
1844 1.1.1.9 christos abort ();
1845 1.1.1.9 christos
1846 1.1 christos BFD_ASSERT (howto != SEARCH);
1847 1.1 christos
1848 1.1 christos entry = ((struct elf_m68k_bfd2got_entry *)
1849 1.1 christos bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)));
1850 1.1 christos if (entry == NULL)
1851 1.1 christos return NULL;
1852 1.1 christos
1853 1.1 christos entry->bfd = abfd;
1854 1.1 christos
1855 1.1 christos entry->got = elf_m68k_create_empty_got (info);
1856 1.1 christos if (entry->got == NULL)
1857 1.1 christos return NULL;
1858 1.1 christos
1859 1.1 christos *ptr = entry;
1860 1.1 christos }
1861 1.1 christos else
1862 1.1 christos {
1863 1.1 christos BFD_ASSERT (howto != MUST_CREATE);
1864 1.1 christos
1865 1.1 christos /* Return existing entry. */
1866 1.1 christos entry = *ptr;
1867 1.1 christos }
1868 1.1 christos
1869 1.1 christos return entry;
1870 1.1 christos }
1871 1.1 christos
1872 1.1 christos struct elf_m68k_can_merge_gots_arg
1873 1.1 christos {
1874 1.1 christos /* A current_got that we constructing a DIFF against. */
1875 1.1 christos struct elf_m68k_got *big;
1876 1.1 christos
1877 1.1 christos /* GOT holding entries not present or that should be changed in
1878 1.1 christos BIG. */
1879 1.1 christos struct elf_m68k_got *diff;
1880 1.1 christos
1881 1.1 christos /* Context where to allocate memory. */
1882 1.1 christos struct bfd_link_info *info;
1883 1.1 christos
1884 1.1 christos /* Error flag. */
1885 1.1 christos bfd_boolean error_p;
1886 1.1 christos };
1887 1.1 christos
1888 1.1 christos /* Process a single entry from the small GOT to see if it should be added
1889 1.1 christos or updated in the big GOT. */
1890 1.1 christos
1891 1.1 christos static int
1892 1.1 christos elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg)
1893 1.1 christos {
1894 1.1 christos const struct elf_m68k_got_entry *entry1;
1895 1.1 christos struct elf_m68k_can_merge_gots_arg *arg;
1896 1.1 christos const struct elf_m68k_got_entry *entry2;
1897 1.1 christos enum elf_m68k_reloc_type type;
1898 1.1 christos
1899 1.1 christos entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr;
1900 1.1 christos arg = (struct elf_m68k_can_merge_gots_arg *) _arg;
1901 1.1 christos
1902 1.1 christos entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL);
1903 1.1 christos
1904 1.1 christos if (entry2 != NULL)
1905 1.1 christos /* We found an existing entry. Check if we should update it. */
1906 1.1 christos {
1907 1.1 christos type = elf_m68k_update_got_entry_type (arg->diff,
1908 1.1 christos entry2->key_.type,
1909 1.1 christos entry1->key_.type);
1910 1.1 christos
1911 1.1 christos if (type == entry2->key_.type)
1912 1.1 christos /* ENTRY1 doesn't update data in ENTRY2. Skip it.
1913 1.1 christos To skip creation of difference entry we use the type,
1914 1.1 christos which we won't see in GOT entries for sure. */
1915 1.1 christos type = R_68K_max;
1916 1.1 christos }
1917 1.1 christos else
1918 1.1 christos /* We didn't find the entry. Add entry1 to DIFF. */
1919 1.1 christos {
1920 1.1 christos BFD_ASSERT (entry1->key_.type != R_68K_max);
1921 1.1 christos
1922 1.1 christos type = elf_m68k_update_got_entry_type (arg->diff,
1923 1.1 christos R_68K_max, entry1->key_.type);
1924 1.1 christos
1925 1.1 christos if (entry1->key_.bfd != NULL)
1926 1.1 christos arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type);
1927 1.1 christos }
1928 1.1 christos
1929 1.1 christos if (type != R_68K_max)
1930 1.1 christos /* Create an entry in DIFF. */
1931 1.1 christos {
1932 1.1 christos struct elf_m68k_got_entry *entry;
1933 1.1 christos
1934 1.1 christos entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE,
1935 1.1 christos arg->info);
1936 1.1 christos if (entry == NULL)
1937 1.1 christos {
1938 1.1 christos arg->error_p = TRUE;
1939 1.1 christos return 0;
1940 1.1 christos }
1941 1.1 christos
1942 1.1 christos entry->key_.type = type;
1943 1.1 christos }
1944 1.1 christos
1945 1.1 christos return 1;
1946 1.1 christos }
1947 1.1 christos
1948 1.1 christos /* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it.
1949 1.1 christos Construct DIFF GOT holding the entries which should be added or updated
1950 1.1 christos in BIG GOT to accumulate information from SMALL.
1951 1.1 christos INFO is the context where memory should be allocated. */
1952 1.1 christos
1953 1.1 christos static bfd_boolean
1954 1.1 christos elf_m68k_can_merge_gots (struct elf_m68k_got *big,
1955 1.1 christos const struct elf_m68k_got *small,
1956 1.1 christos struct bfd_link_info *info,
1957 1.1 christos struct elf_m68k_got *diff)
1958 1.1 christos {
1959 1.1 christos struct elf_m68k_can_merge_gots_arg arg_;
1960 1.1 christos
1961 1.1 christos BFD_ASSERT (small->offset == (bfd_vma) -1);
1962 1.1 christos
1963 1.1 christos arg_.big = big;
1964 1.1 christos arg_.diff = diff;
1965 1.1 christos arg_.info = info;
1966 1.1 christos arg_.error_p = FALSE;
1967 1.1 christos htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_);
1968 1.1 christos if (arg_.error_p)
1969 1.1 christos {
1970 1.1 christos diff->offset = 0;
1971 1.1 christos return FALSE;
1972 1.1 christos }
1973 1.1 christos
1974 1.1 christos /* Check for overflow. */
1975 1.1 christos if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8]
1976 1.1 christos > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1977 1.1 christos || (big->n_slots[R_16] + arg_.diff->n_slots[R_16]
1978 1.1 christos > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1979 1.1 christos return FALSE;
1980 1.1 christos
1981 1.1 christos return TRUE;
1982 1.1 christos }
1983 1.1 christos
1984 1.1 christos struct elf_m68k_merge_gots_arg
1985 1.1 christos {
1986 1.1 christos /* The BIG got. */
1987 1.1 christos struct elf_m68k_got *big;
1988 1.1 christos
1989 1.1 christos /* Context where memory should be allocated. */
1990 1.1 christos struct bfd_link_info *info;
1991 1.1 christos
1992 1.1 christos /* Error flag. */
1993 1.1 christos bfd_boolean error_p;
1994 1.1 christos };
1995 1.1 christos
1996 1.1 christos /* Process a single entry from DIFF got. Add or update corresponding
1997 1.1 christos entry in the BIG got. */
1998 1.1 christos
1999 1.1 christos static int
2000 1.1 christos elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg)
2001 1.1 christos {
2002 1.1 christos const struct elf_m68k_got_entry *from;
2003 1.1 christos struct elf_m68k_merge_gots_arg *arg;
2004 1.1 christos struct elf_m68k_got_entry *to;
2005 1.1 christos
2006 1.1 christos from = (const struct elf_m68k_got_entry *) *entry_ptr;
2007 1.1 christos arg = (struct elf_m68k_merge_gots_arg *) _arg;
2008 1.1 christos
2009 1.1 christos to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE,
2010 1.1 christos arg->info);
2011 1.1 christos if (to == NULL)
2012 1.1 christos {
2013 1.1 christos arg->error_p = TRUE;
2014 1.1 christos return 0;
2015 1.1 christos }
2016 1.1 christos
2017 1.1 christos BFD_ASSERT (to->u.s1.refcount == 0);
2018 1.1 christos /* All we need to merge is TYPE. */
2019 1.1 christos to->key_.type = from->key_.type;
2020 1.1 christos
2021 1.1 christos return 1;
2022 1.1 christos }
2023 1.1 christos
2024 1.1 christos /* Merge data from DIFF to BIG. INFO is context where memory should be
2025 1.1 christos allocated. */
2026 1.1 christos
2027 1.1 christos static bfd_boolean
2028 1.1 christos elf_m68k_merge_gots (struct elf_m68k_got *big,
2029 1.1 christos struct elf_m68k_got *diff,
2030 1.1 christos struct bfd_link_info *info)
2031 1.1 christos {
2032 1.1 christos if (diff->entries != NULL)
2033 1.1 christos /* DIFF is not empty. Merge it into BIG GOT. */
2034 1.1 christos {
2035 1.1 christos struct elf_m68k_merge_gots_arg arg_;
2036 1.1 christos
2037 1.1 christos /* Merge entries. */
2038 1.1 christos arg_.big = big;
2039 1.1 christos arg_.info = info;
2040 1.1 christos arg_.error_p = FALSE;
2041 1.1 christos htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_);
2042 1.1 christos if (arg_.error_p)
2043 1.1 christos return FALSE;
2044 1.1 christos
2045 1.1 christos /* Merge counters. */
2046 1.1 christos big->n_slots[R_8] += diff->n_slots[R_8];
2047 1.1 christos big->n_slots[R_16] += diff->n_slots[R_16];
2048 1.1 christos big->n_slots[R_32] += diff->n_slots[R_32];
2049 1.1 christos big->local_n_slots += diff->local_n_slots;
2050 1.1 christos }
2051 1.1 christos else
2052 1.1 christos /* DIFF is empty. */
2053 1.1 christos {
2054 1.1 christos BFD_ASSERT (diff->n_slots[R_8] == 0);
2055 1.1 christos BFD_ASSERT (diff->n_slots[R_16] == 0);
2056 1.1 christos BFD_ASSERT (diff->n_slots[R_32] == 0);
2057 1.1 christos BFD_ASSERT (diff->local_n_slots == 0);
2058 1.1 christos }
2059 1.1 christos
2060 1.1 christos BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p
2061 1.1 christos || ((big->n_slots[R_8]
2062 1.1 christos <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
2063 1.1 christos && (big->n_slots[R_16]
2064 1.1 christos <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))));
2065 1.1 christos
2066 1.1 christos return TRUE;
2067 1.1 christos }
2068 1.1 christos
2069 1.1 christos struct elf_m68k_finalize_got_offsets_arg
2070 1.1 christos {
2071 1.1 christos /* Ranges of the offsets for GOT entries.
2072 1.1 christos R_x entries receive offsets between offset1[R_x] and offset2[R_x].
2073 1.1 christos R_x is R_8, R_16 and R_32. */
2074 1.1 christos bfd_vma *offset1;
2075 1.1 christos bfd_vma *offset2;
2076 1.1 christos
2077 1.1 christos /* Mapping from global symndx to global symbols.
2078 1.1 christos This is used to build lists of got entries for global symbols. */
2079 1.1 christos struct elf_m68k_link_hash_entry **symndx2h;
2080 1.1 christos
2081 1.1 christos bfd_vma n_ldm_entries;
2082 1.1 christos };
2083 1.1 christos
2084 1.1 christos /* Assign ENTRY an offset. Build list of GOT entries for global symbols
2085 1.1 christos along the way. */
2086 1.1 christos
2087 1.1 christos static int
2088 1.1 christos elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg)
2089 1.1 christos {
2090 1.1 christos struct elf_m68k_got_entry *entry;
2091 1.1 christos struct elf_m68k_finalize_got_offsets_arg *arg;
2092 1.1 christos
2093 1.1 christos enum elf_m68k_got_offset_size got_offset_size;
2094 1.1 christos bfd_vma entry_size;
2095 1.1 christos
2096 1.1 christos entry = (struct elf_m68k_got_entry *) *entry_ptr;
2097 1.1 christos arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg;
2098 1.1 christos
2099 1.1 christos /* This should be a fresh entry created in elf_m68k_can_merge_gots. */
2100 1.1 christos BFD_ASSERT (entry->u.s1.refcount == 0);
2101 1.1 christos
2102 1.1 christos /* Get GOT offset size for the entry . */
2103 1.1 christos got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type);
2104 1.1 christos
2105 1.1 christos /* Calculate entry size in bytes. */
2106 1.1 christos entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type);
2107 1.1 christos
2108 1.1 christos /* Check if we should switch to negative range of the offsets. */
2109 1.1 christos if (arg->offset1[got_offset_size] + entry_size
2110 1.1 christos > arg->offset2[got_offset_size])
2111 1.1 christos {
2112 1.1 christos /* Verify that this is the only switch to negative range for
2113 1.1 christos got_offset_size. If this assertion fails, then we've miscalculated
2114 1.1 christos range for got_offset_size entries in
2115 1.1 christos elf_m68k_finalize_got_offsets. */
2116 1.1 christos BFD_ASSERT (arg->offset2[got_offset_size]
2117 1.1 christos != arg->offset2[-(int) got_offset_size - 1]);
2118 1.1 christos
2119 1.1 christos /* Switch. */
2120 1.1 christos arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1];
2121 1.1 christos arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1];
2122 1.1 christos
2123 1.1 christos /* Verify that now we have enough room for the entry. */
2124 1.1 christos BFD_ASSERT (arg->offset1[got_offset_size] + entry_size
2125 1.1 christos <= arg->offset2[got_offset_size]);
2126 1.1 christos }
2127 1.1 christos
2128 1.1 christos /* Assign offset to entry. */
2129 1.1 christos entry->u.s2.offset = arg->offset1[got_offset_size];
2130 1.1 christos arg->offset1[got_offset_size] += entry_size;
2131 1.1 christos
2132 1.1 christos if (entry->key_.bfd == NULL)
2133 1.1 christos /* Hook up this entry into the list of got_entries of H. */
2134 1.1 christos {
2135 1.1 christos struct elf_m68k_link_hash_entry *h;
2136 1.1 christos
2137 1.1 christos h = arg->symndx2h[entry->key_.symndx];
2138 1.1 christos if (h != NULL)
2139 1.1 christos {
2140 1.1 christos entry->u.s2.next = h->glist;
2141 1.1 christos h->glist = entry;
2142 1.1 christos }
2143 1.1 christos else
2144 1.1 christos /* This should be the entry for TLS_LDM relocation then. */
2145 1.1 christos {
2146 1.1 christos BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type)
2147 1.1 christos == R_68K_TLS_LDM32)
2148 1.1 christos && entry->key_.symndx == 0);
2149 1.1 christos
2150 1.1 christos ++arg->n_ldm_entries;
2151 1.1 christos }
2152 1.1 christos }
2153 1.1 christos else
2154 1.1 christos /* This entry is for local symbol. */
2155 1.1 christos entry->u.s2.next = NULL;
2156 1.1 christos
2157 1.1 christos return 1;
2158 1.1 christos }
2159 1.1 christos
2160 1.1 christos /* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we
2161 1.1 christos should use negative offsets.
2162 1.1 christos Build list of GOT entries for global symbols along the way.
2163 1.1 christos SYMNDX2H is mapping from global symbol indices to actual
2164 1.1 christos global symbols.
2165 1.1 christos Return offset at which next GOT should start. */
2166 1.1 christos
2167 1.1 christos static void
2168 1.1 christos elf_m68k_finalize_got_offsets (struct elf_m68k_got *got,
2169 1.1 christos bfd_boolean use_neg_got_offsets_p,
2170 1.1 christos struct elf_m68k_link_hash_entry **symndx2h,
2171 1.1 christos bfd_vma *final_offset, bfd_vma *n_ldm_entries)
2172 1.1 christos {
2173 1.1 christos struct elf_m68k_finalize_got_offsets_arg arg_;
2174 1.1 christos bfd_vma offset1_[2 * R_LAST];
2175 1.1 christos bfd_vma offset2_[2 * R_LAST];
2176 1.1 christos int i;
2177 1.1 christos bfd_vma start_offset;
2178 1.1 christos
2179 1.1 christos BFD_ASSERT (got->offset != (bfd_vma) -1);
2180 1.1 christos
2181 1.1 christos /* We set entry offsets relative to the .got section (and not the
2182 1.1 christos start of a particular GOT), so that we can use them in
2183 1.1 christos finish_dynamic_symbol without needing to know the GOT which they come
2184 1.1 christos from. */
2185 1.1 christos
2186 1.1 christos /* Put offset1 in the middle of offset1_, same for offset2. */
2187 1.1 christos arg_.offset1 = offset1_ + R_LAST;
2188 1.1 christos arg_.offset2 = offset2_ + R_LAST;
2189 1.1 christos
2190 1.1 christos start_offset = got->offset;
2191 1.1 christos
2192 1.1 christos if (use_neg_got_offsets_p)
2193 1.1 christos /* Setup both negative and positive ranges for R_8, R_16 and R_32. */
2194 1.1 christos i = -(int) R_32 - 1;
2195 1.1 christos else
2196 1.1 christos /* Setup positives ranges for R_8, R_16 and R_32. */
2197 1.1 christos i = (int) R_8;
2198 1.1 christos
2199 1.1 christos for (; i <= (int) R_32; ++i)
2200 1.1 christos {
2201 1.1 christos int j;
2202 1.1 christos size_t n;
2203 1.1 christos
2204 1.1 christos /* Set beginning of the range of offsets I. */
2205 1.1 christos arg_.offset1[i] = start_offset;
2206 1.1 christos
2207 1.1 christos /* Calculate number of slots that require I offsets. */
2208 1.1 christos j = (i >= 0) ? i : -i - 1;
2209 1.1 christos n = (j >= 1) ? got->n_slots[j - 1] : 0;
2210 1.1 christos n = got->n_slots[j] - n;
2211 1.1 christos
2212 1.1 christos if (use_neg_got_offsets_p && n != 0)
2213 1.1 christos {
2214 1.1 christos if (i < 0)
2215 1.1 christos /* We first fill the positive side of the range, so we might
2216 1.1 christos end up with one empty slot at that side when we can't fit
2217 1.1 christos whole 2-slot entry. Account for that at negative side of
2218 1.1 christos the interval with one additional entry. */
2219 1.1 christos n = n / 2 + 1;
2220 1.1 christos else
2221 1.1 christos /* When the number of slots is odd, make positive side of the
2222 1.1 christos range one entry bigger. */
2223 1.1 christos n = (n + 1) / 2;
2224 1.1 christos }
2225 1.1 christos
2226 1.1 christos /* N is the number of slots that require I offsets.
2227 1.1 christos Calculate length of the range for I offsets. */
2228 1.1 christos n = 4 * n;
2229 1.1 christos
2230 1.1 christos /* Set end of the range. */
2231 1.1 christos arg_.offset2[i] = start_offset + n;
2232 1.1 christos
2233 1.1 christos start_offset = arg_.offset2[i];
2234 1.1 christos }
2235 1.1 christos
2236 1.1 christos if (!use_neg_got_offsets_p)
2237 1.1 christos /* Make sure that if we try to switch to negative offsets in
2238 1.1 christos elf_m68k_finalize_got_offsets_1, the assert therein will catch
2239 1.1 christos the bug. */
2240 1.1 christos for (i = R_8; i <= R_32; ++i)
2241 1.1 christos arg_.offset2[-i - 1] = arg_.offset2[i];
2242 1.1 christos
2243 1.1 christos /* Setup got->offset. offset1[R_8] is either in the middle or at the
2244 1.1 christos beginning of GOT depending on use_neg_got_offsets_p. */
2245 1.1 christos got->offset = arg_.offset1[R_8];
2246 1.1 christos
2247 1.1 christos arg_.symndx2h = symndx2h;
2248 1.1 christos arg_.n_ldm_entries = 0;
2249 1.1 christos
2250 1.1 christos /* Assign offsets. */
2251 1.1 christos htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_);
2252 1.1 christos
2253 1.1 christos /* Check offset ranges we have actually assigned. */
2254 1.1 christos for (i = (int) R_8; i <= (int) R_32; ++i)
2255 1.1 christos BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4);
2256 1.1 christos
2257 1.1 christos *final_offset = start_offset;
2258 1.1 christos *n_ldm_entries = arg_.n_ldm_entries;
2259 1.1 christos }
2260 1.1 christos
2261 1.1 christos struct elf_m68k_partition_multi_got_arg
2262 1.1 christos {
2263 1.1 christos /* The GOT we are adding entries to. Aka big got. */
2264 1.1 christos struct elf_m68k_got *current_got;
2265 1.1 christos
2266 1.1 christos /* Offset to assign the next CURRENT_GOT. */
2267 1.1 christos bfd_vma offset;
2268 1.1 christos
2269 1.1 christos /* Context where memory should be allocated. */
2270 1.1 christos struct bfd_link_info *info;
2271 1.1 christos
2272 1.1 christos /* Total number of slots in the .got section.
2273 1.1 christos This is used to calculate size of the .got and .rela.got sections. */
2274 1.1 christos bfd_vma n_slots;
2275 1.1 christos
2276 1.1 christos /* Difference in numbers of allocated slots in the .got section
2277 1.1 christos and necessary relocations in the .rela.got section.
2278 1.1 christos This is used to calculate size of the .rela.got section. */
2279 1.1 christos bfd_vma slots_relas_diff;
2280 1.1 christos
2281 1.1 christos /* Error flag. */
2282 1.1 christos bfd_boolean error_p;
2283 1.1 christos
2284 1.1 christos /* Mapping from global symndx to global symbols.
2285 1.1 christos This is used to build lists of got entries for global symbols. */
2286 1.1 christos struct elf_m68k_link_hash_entry **symndx2h;
2287 1.1 christos };
2288 1.1 christos
2289 1.1 christos static void
2290 1.1 christos elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg)
2291 1.1 christos {
2292 1.1 christos bfd_vma n_ldm_entries;
2293 1.1 christos
2294 1.1 christos elf_m68k_finalize_got_offsets (arg->current_got,
2295 1.1 christos (elf_m68k_hash_table (arg->info)
2296 1.1 christos ->use_neg_got_offsets_p),
2297 1.1 christos arg->symndx2h,
2298 1.1 christos &arg->offset, &n_ldm_entries);
2299 1.1 christos
2300 1.1 christos arg->n_slots += arg->current_got->n_slots[R_32];
2301 1.1.1.6 christos
2302 1.1 christos if (!bfd_link_pic (arg->info))
2303 1.1 christos /* If we are generating a shared object, we need to
2304 1.1 christos output a R_68K_RELATIVE reloc so that the dynamic
2305 1.1 christos linker can adjust this GOT entry. Overwise we
2306 1.1 christos don't need space in .rela.got for local symbols. */
2307 1.1 christos arg->slots_relas_diff += arg->current_got->local_n_slots;
2308 1.1 christos
2309 1.1 christos /* @LDM relocations require a 2-slot GOT entry, but only
2310 1.1 christos one relocation. Account for that. */
2311 1.1 christos arg->slots_relas_diff += n_ldm_entries;
2312 1.1 christos
2313 1.1 christos BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots);
2314 1.1 christos }
2315 1.1 christos
2316 1.1 christos
2317 1.1 christos /* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT
2318 1.1 christos or start a new CURRENT_GOT. */
2319 1.1 christos
2320 1.1 christos static int
2321 1.1 christos elf_m68k_partition_multi_got_1 (void **_entry, void *_arg)
2322 1.1 christos {
2323 1.1 christos struct elf_m68k_bfd2got_entry *entry;
2324 1.1 christos struct elf_m68k_partition_multi_got_arg *arg;
2325 1.1 christos struct elf_m68k_got *got;
2326 1.1 christos struct elf_m68k_got diff_;
2327 1.1 christos struct elf_m68k_got *diff;
2328 1.1 christos
2329 1.1 christos entry = (struct elf_m68k_bfd2got_entry *) *_entry;
2330 1.1 christos arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2331 1.1 christos
2332 1.1 christos got = entry->got;
2333 1.1 christos BFD_ASSERT (got != NULL);
2334 1.1 christos BFD_ASSERT (got->offset == (bfd_vma) -1);
2335 1.1 christos
2336 1.1 christos diff = NULL;
2337 1.1 christos
2338 1.1 christos if (arg->current_got != NULL)
2339 1.1 christos /* Construct diff. */
2340 1.1 christos {
2341 1.1 christos diff = &diff_;
2342 1.1 christos elf_m68k_init_got (diff);
2343 1.1 christos
2344 1.1 christos if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff))
2345 1.1 christos {
2346 1.1 christos if (diff->offset == 0)
2347 1.1 christos /* Offset set to 0 in the diff_ indicates an error. */
2348 1.1 christos {
2349 1.1 christos arg->error_p = TRUE;
2350 1.1 christos goto final_return;
2351 1.1 christos }
2352 1.1 christos
2353 1.1 christos if (elf_m68k_hash_table (arg->info)->allow_multigot_p)
2354 1.1 christos {
2355 1.1 christos elf_m68k_clear_got (diff);
2356 1.1 christos /* Schedule to finish up current_got and start new one. */
2357 1.1 christos diff = NULL;
2358 1.1 christos }
2359 1.1 christos /* else
2360 1.1 christos Merge GOTs no matter what. If big GOT overflows,
2361 1.1 christos we'll fail in relocate_section due to truncated relocations.
2362 1.1 christos
2363 1.1 christos ??? May be fail earlier? E.g., in can_merge_gots. */
2364 1.1 christos }
2365 1.1 christos }
2366 1.1 christos else
2367 1.1 christos /* Diff of got against empty current_got is got itself. */
2368 1.1 christos {
2369 1.1 christos /* Create empty current_got to put subsequent GOTs to. */
2370 1.1 christos arg->current_got = elf_m68k_create_empty_got (arg->info);
2371 1.1 christos if (arg->current_got == NULL)
2372 1.1 christos {
2373 1.1 christos arg->error_p = TRUE;
2374 1.1 christos goto final_return;
2375 1.1 christos }
2376 1.1 christos
2377 1.1 christos arg->current_got->offset = arg->offset;
2378 1.1 christos
2379 1.1 christos diff = got;
2380 1.1 christos }
2381 1.1 christos
2382 1.1 christos if (diff != NULL)
2383 1.1 christos {
2384 1.1 christos if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info))
2385 1.1 christos {
2386 1.1 christos arg->error_p = TRUE;
2387 1.1 christos goto final_return;
2388 1.1 christos }
2389 1.1 christos
2390 1.1 christos /* Now we can free GOT. */
2391 1.1 christos elf_m68k_clear_got (got);
2392 1.1 christos
2393 1.1 christos entry->got = arg->current_got;
2394 1.1 christos }
2395 1.1 christos else
2396 1.1 christos {
2397 1.1 christos /* Finish up current_got. */
2398 1.1 christos elf_m68k_partition_multi_got_2 (arg);
2399 1.1 christos
2400 1.1 christos /* Schedule to start a new current_got. */
2401 1.1 christos arg->current_got = NULL;
2402 1.1 christos
2403 1.1 christos /* Retry. */
2404 1.1 christos if (!elf_m68k_partition_multi_got_1 (_entry, _arg))
2405 1.1 christos {
2406 1.1 christos BFD_ASSERT (arg->error_p);
2407 1.1 christos goto final_return;
2408 1.1 christos }
2409 1.1 christos }
2410 1.1 christos
2411 1.1 christos final_return:
2412 1.1 christos if (diff != NULL)
2413 1.1 christos elf_m68k_clear_got (diff);
2414 1.1.1.8 christos
2415 1.1 christos return !arg->error_p;
2416 1.1 christos }
2417 1.1 christos
2418 1.1 christos /* Helper function to build symndx2h mapping. */
2419 1.1 christos
2420 1.1 christos static bfd_boolean
2421 1.1 christos elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h,
2422 1.1 christos void *_arg)
2423 1.1 christos {
2424 1.1 christos struct elf_m68k_link_hash_entry *h;
2425 1.1 christos
2426 1.1 christos h = elf_m68k_hash_entry (_h);
2427 1.1 christos
2428 1.1 christos if (h->got_entry_key != 0)
2429 1.1 christos /* H has at least one entry in the GOT. */
2430 1.1 christos {
2431 1.1 christos struct elf_m68k_partition_multi_got_arg *arg;
2432 1.1 christos
2433 1.1 christos arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2434 1.1 christos
2435 1.1 christos BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL);
2436 1.1 christos arg->symndx2h[h->got_entry_key] = h;
2437 1.1 christos }
2438 1.1 christos
2439 1.1 christos return TRUE;
2440 1.1 christos }
2441 1.1 christos
2442 1.1 christos /* Merge GOTs of some BFDs, assign offsets to GOT entries and build
2443 1.1 christos lists of GOT entries for global symbols.
2444 1.1 christos Calculate sizes of .got and .rela.got sections. */
2445 1.1 christos
2446 1.1 christos static bfd_boolean
2447 1.1 christos elf_m68k_partition_multi_got (struct bfd_link_info *info)
2448 1.1 christos {
2449 1.1 christos struct elf_m68k_multi_got *multi_got;
2450 1.1 christos struct elf_m68k_partition_multi_got_arg arg_;
2451 1.1 christos
2452 1.1 christos multi_got = elf_m68k_multi_got (info);
2453 1.1 christos
2454 1.1 christos arg_.current_got = NULL;
2455 1.1 christos arg_.offset = 0;
2456 1.1 christos arg_.info = info;
2457 1.1 christos arg_.n_slots = 0;
2458 1.1 christos arg_.slots_relas_diff = 0;
2459 1.1 christos arg_.error_p = FALSE;
2460 1.1 christos
2461 1.1 christos if (multi_got->bfd2got != NULL)
2462 1.1 christos {
2463 1.1 christos /* Initialize symndx2h mapping. */
2464 1.1 christos {
2465 1.1 christos arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx
2466 1.1 christos * sizeof (*arg_.symndx2h));
2467 1.1 christos if (arg_.symndx2h == NULL)
2468 1.1 christos return FALSE;
2469 1.1 christos
2470 1.1 christos elf_link_hash_traverse (elf_hash_table (info),
2471 1.1 christos elf_m68k_init_symndx2h_1, &arg_);
2472 1.1 christos }
2473 1.1 christos
2474 1.1 christos /* Partition. */
2475 1.1 christos htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1,
2476 1.1 christos &arg_);
2477 1.1 christos if (arg_.error_p)
2478 1.1 christos {
2479 1.1 christos free (arg_.symndx2h);
2480 1.1 christos arg_.symndx2h = NULL;
2481 1.1 christos
2482 1.1 christos return FALSE;
2483 1.1 christos }
2484 1.1 christos
2485 1.1 christos /* Finish up last current_got. */
2486 1.1 christos elf_m68k_partition_multi_got_2 (&arg_);
2487 1.1 christos
2488 1.1 christos free (arg_.symndx2h);
2489 1.1 christos }
2490 1.1 christos
2491 1.1 christos if (elf_hash_table (info)->dynobj != NULL)
2492 1.1 christos /* Set sizes of .got and .rela.got sections. */
2493 1.1 christos {
2494 1.1 christos asection *s;
2495 1.1.1.7 christos
2496 1.1 christos s = elf_hash_table (info)->sgot;
2497 1.1 christos if (s != NULL)
2498 1.1 christos s->size = arg_.offset;
2499 1.1 christos else
2500 1.1 christos BFD_ASSERT (arg_.offset == 0);
2501 1.1 christos
2502 1.1 christos BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots);
2503 1.1 christos arg_.n_slots -= arg_.slots_relas_diff;
2504 1.1.1.7 christos
2505 1.1 christos s = elf_hash_table (info)->srelgot;
2506 1.1 christos if (s != NULL)
2507 1.1 christos s->size = arg_.n_slots * sizeof (Elf32_External_Rela);
2508 1.1 christos else
2509 1.1 christos BFD_ASSERT (arg_.n_slots == 0);
2510 1.1 christos }
2511 1.1 christos else
2512 1.1 christos BFD_ASSERT (multi_got->bfd2got == NULL);
2513 1.1 christos
2514 1.1 christos return TRUE;
2515 1.1 christos }
2516 1.1 christos
2517 1.1 christos /* Copy any information related to dynamic linking from a pre-existing
2518 1.1 christos symbol to a newly created symbol. Also called to copy flags and
2519 1.1 christos other back-end info to a weakdef, in which case the symbol is not
2520 1.1 christos newly created and plt/got refcounts and dynamic indices should not
2521 1.1 christos be copied. */
2522 1.1 christos
2523 1.1 christos static void
2524 1.1 christos elf_m68k_copy_indirect_symbol (struct bfd_link_info *info,
2525 1.1 christos struct elf_link_hash_entry *_dir,
2526 1.1 christos struct elf_link_hash_entry *_ind)
2527 1.1 christos {
2528 1.1 christos struct elf_m68k_link_hash_entry *dir;
2529 1.1 christos struct elf_m68k_link_hash_entry *ind;
2530 1.1 christos
2531 1.1 christos _bfd_elf_link_hash_copy_indirect (info, _dir, _ind);
2532 1.1 christos
2533 1.1 christos if (_ind->root.type != bfd_link_hash_indirect)
2534 1.1 christos return;
2535 1.1 christos
2536 1.1 christos dir = elf_m68k_hash_entry (_dir);
2537 1.1 christos ind = elf_m68k_hash_entry (_ind);
2538 1.1 christos
2539 1.1 christos /* Any absolute non-dynamic relocations against an indirect or weak
2540 1.1 christos definition will be against the target symbol. */
2541 1.1 christos _dir->non_got_ref |= _ind->non_got_ref;
2542 1.1 christos
2543 1.1 christos /* We might have a direct symbol already having entries in the GOTs.
2544 1.1 christos Update its key only in case indirect symbol has GOT entries and
2545 1.1 christos assert that both indirect and direct symbols don't have GOT entries
2546 1.1 christos at the same time. */
2547 1.1 christos if (ind->got_entry_key != 0)
2548 1.1 christos {
2549 1.1 christos BFD_ASSERT (dir->got_entry_key == 0);
2550 1.1 christos /* Assert that GOTs aren't partioned yet. */
2551 1.1 christos BFD_ASSERT (ind->glist == NULL);
2552 1.1 christos
2553 1.1 christos dir->got_entry_key = ind->got_entry_key;
2554 1.1 christos ind->got_entry_key = 0;
2555 1.1 christos }
2556 1.1 christos }
2557 1.1 christos
2558 1.1 christos /* Look through the relocs for a section during the first phase, and
2559 1.1 christos allocate space in the global offset table or procedure linkage
2560 1.1 christos table. */
2561 1.1 christos
2562 1.1.1.2 christos static bfd_boolean
2563 1.1.1.2 christos elf_m68k_check_relocs (bfd *abfd,
2564 1.1.1.2 christos struct bfd_link_info *info,
2565 1.1.1.2 christos asection *sec,
2566 1.1 christos const Elf_Internal_Rela *relocs)
2567 1.1 christos {
2568 1.1 christos bfd *dynobj;
2569 1.1 christos Elf_Internal_Shdr *symtab_hdr;
2570 1.1 christos struct elf_link_hash_entry **sym_hashes;
2571 1.1 christos const Elf_Internal_Rela *rel;
2572 1.1 christos const Elf_Internal_Rela *rel_end;
2573 1.1 christos asection *sreloc;
2574 1.1 christos struct elf_m68k_got *got;
2575 1.1.1.6 christos
2576 1.1 christos if (bfd_link_relocatable (info))
2577 1.1 christos return TRUE;
2578 1.1 christos
2579 1.1 christos dynobj = elf_hash_table (info)->dynobj;
2580 1.1 christos symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2581 1.1 christos sym_hashes = elf_sym_hashes (abfd);
2582 1.1 christos
2583 1.1 christos sreloc = NULL;
2584 1.1 christos
2585 1.1 christos got = NULL;
2586 1.1 christos
2587 1.1 christos rel_end = relocs + sec->reloc_count;
2588 1.1 christos for (rel = relocs; rel < rel_end; rel++)
2589 1.1 christos {
2590 1.1 christos unsigned long r_symndx;
2591 1.1 christos struct elf_link_hash_entry *h;
2592 1.1 christos
2593 1.1 christos r_symndx = ELF32_R_SYM (rel->r_info);
2594 1.1 christos
2595 1.1 christos if (r_symndx < symtab_hdr->sh_info)
2596 1.1 christos h = NULL;
2597 1.1 christos else
2598 1.1 christos {
2599 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2600 1.1 christos while (h->root.type == bfd_link_hash_indirect
2601 1.1 christos || h->root.type == bfd_link_hash_warning)
2602 1.1 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
2603 1.1 christos }
2604 1.1 christos
2605 1.1 christos switch (ELF32_R_TYPE (rel->r_info))
2606 1.1 christos {
2607 1.1 christos case R_68K_GOT8:
2608 1.1 christos case R_68K_GOT16:
2609 1.1 christos case R_68K_GOT32:
2610 1.1 christos if (h != NULL
2611 1.1 christos && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2612 1.1 christos break;
2613 1.1 christos /* Fall through. */
2614 1.1 christos
2615 1.1 christos /* Relative GOT relocations. */
2616 1.1 christos case R_68K_GOT8O:
2617 1.1 christos case R_68K_GOT16O:
2618 1.1 christos case R_68K_GOT32O:
2619 1.1 christos /* Fall through. */
2620 1.1 christos
2621 1.1 christos /* TLS relocations. */
2622 1.1 christos case R_68K_TLS_GD8:
2623 1.1 christos case R_68K_TLS_GD16:
2624 1.1 christos case R_68K_TLS_GD32:
2625 1.1 christos case R_68K_TLS_LDM8:
2626 1.1 christos case R_68K_TLS_LDM16:
2627 1.1 christos case R_68K_TLS_LDM32:
2628 1.1 christos case R_68K_TLS_IE8:
2629 1.1 christos case R_68K_TLS_IE16:
2630 1.1 christos case R_68K_TLS_IE32:
2631 1.1 christos
2632 1.1 christos case R_68K_TLS_TPREL32:
2633 1.1 christos case R_68K_TLS_DTPREL32:
2634 1.1 christos
2635 1.1.1.6 christos if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32
2636 1.1 christos && bfd_link_pic (info))
2637 1.1 christos /* Do the special chorus for libraries with static TLS. */
2638 1.1 christos info->flags |= DF_STATIC_TLS;
2639 1.1 christos
2640 1.1 christos /* This symbol requires a global offset table entry. */
2641 1.1 christos
2642 1.1 christos if (dynobj == NULL)
2643 1.1 christos {
2644 1.1 christos /* Create the .got section. */
2645 1.1 christos elf_hash_table (info)->dynobj = dynobj = abfd;
2646 1.1 christos if (!_bfd_elf_create_got_section (dynobj, info))
2647 1.1 christos return FALSE;
2648 1.1 christos }
2649 1.1 christos
2650 1.1 christos if (got == NULL)
2651 1.1 christos {
2652 1.1 christos struct elf_m68k_bfd2got_entry *bfd2got_entry;
2653 1.1 christos
2654 1.1 christos bfd2got_entry
2655 1.1 christos = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2656 1.1 christos abfd, FIND_OR_CREATE, info);
2657 1.1 christos if (bfd2got_entry == NULL)
2658 1.1 christos return FALSE;
2659 1.1 christos
2660 1.1 christos got = bfd2got_entry->got;
2661 1.1 christos BFD_ASSERT (got != NULL);
2662 1.1 christos }
2663 1.1 christos
2664 1.1 christos {
2665 1.1 christos struct elf_m68k_got_entry *got_entry;
2666 1.1 christos
2667 1.1 christos /* Add entry to got. */
2668 1.1 christos got_entry = elf_m68k_add_entry_to_got (got, h, abfd,
2669 1.1 christos ELF32_R_TYPE (rel->r_info),
2670 1.1 christos r_symndx, info);
2671 1.1 christos if (got_entry == NULL)
2672 1.1 christos return FALSE;
2673 1.1 christos
2674 1.1 christos if (got_entry->u.s1.refcount == 1)
2675 1.1 christos {
2676 1.1 christos /* Make sure this symbol is output as a dynamic symbol. */
2677 1.1 christos if (h != NULL
2678 1.1 christos && h->dynindx == -1
2679 1.1 christos && !h->forced_local)
2680 1.1 christos {
2681 1.1 christos if (!bfd_elf_link_record_dynamic_symbol (info, h))
2682 1.1 christos return FALSE;
2683 1.1 christos }
2684 1.1 christos }
2685 1.1 christos }
2686 1.1 christos
2687 1.1 christos break;
2688 1.1 christos
2689 1.1 christos case R_68K_PLT8:
2690 1.1 christos case R_68K_PLT16:
2691 1.1 christos case R_68K_PLT32:
2692 1.1 christos /* This symbol requires a procedure linkage table entry. We
2693 1.1.1.8 christos actually build the entry in adjust_dynamic_symbol,
2694 1.1.1.8 christos because this might be a case of linking PIC code which is
2695 1.1.1.8 christos never referenced by a dynamic object, in which case we
2696 1.1.1.8 christos don't need to generate a procedure linkage table entry
2697 1.1 christos after all. */
2698 1.1 christos
2699 1.1 christos /* If this is a local symbol, we resolve it directly without
2700 1.1 christos creating a procedure linkage table entry. */
2701 1.1 christos if (h == NULL)
2702 1.1 christos continue;
2703 1.1 christos
2704 1.1 christos h->needs_plt = 1;
2705 1.1 christos h->plt.refcount++;
2706 1.1 christos break;
2707 1.1 christos
2708 1.1 christos case R_68K_PLT8O:
2709 1.1 christos case R_68K_PLT16O:
2710 1.1 christos case R_68K_PLT32O:
2711 1.1 christos /* This symbol requires a procedure linkage table entry. */
2712 1.1 christos
2713 1.1 christos if (h == NULL)
2714 1.1 christos {
2715 1.1 christos /* It does not make sense to have this relocation for a
2716 1.1 christos local symbol. FIXME: does it? How to handle it if
2717 1.1 christos it does make sense? */
2718 1.1 christos bfd_set_error (bfd_error_bad_value);
2719 1.1 christos return FALSE;
2720 1.1 christos }
2721 1.1 christos
2722 1.1 christos /* Make sure this symbol is output as a dynamic symbol. */
2723 1.1 christos if (h->dynindx == -1
2724 1.1 christos && !h->forced_local)
2725 1.1 christos {
2726 1.1 christos if (!bfd_elf_link_record_dynamic_symbol (info, h))
2727 1.1 christos return FALSE;
2728 1.1 christos }
2729 1.1 christos
2730 1.1 christos h->needs_plt = 1;
2731 1.1 christos h->plt.refcount++;
2732 1.1 christos break;
2733 1.1 christos
2734 1.1 christos case R_68K_PC8:
2735 1.1 christos case R_68K_PC16:
2736 1.1 christos case R_68K_PC32:
2737 1.1 christos /* If we are creating a shared library and this is not a local
2738 1.1 christos symbol, we need to copy the reloc into the shared library.
2739 1.1 christos However when linking with -Bsymbolic and this is a global
2740 1.1 christos symbol which is defined in an object we are including in the
2741 1.1 christos link (i.e., DEF_REGULAR is set), then we can resolve the
2742 1.1 christos reloc directly. At this point we have not seen all the input
2743 1.1 christos files, so it is possible that DEF_REGULAR is not set now but
2744 1.1 christos will be set later (it is never cleared). We account for that
2745 1.1 christos possibility below by storing information in the
2746 1.1.1.6 christos pcrel_relocs_copied field of the hash table entry. */
2747 1.1 christos if (!(bfd_link_pic (info)
2748 1.1 christos && (sec->flags & SEC_ALLOC) != 0
2749 1.1.1.6 christos && h != NULL
2750 1.1 christos && (!SYMBOLIC_BIND (info, h)
2751 1.1 christos || h->root.type == bfd_link_hash_defweak
2752 1.1 christos || !h->def_regular)))
2753 1.1 christos {
2754 1.1 christos if (h != NULL)
2755 1.1 christos {
2756 1.1 christos /* Make sure a plt entry is created for this symbol if
2757 1.1 christos it turns out to be a function defined by a dynamic
2758 1.1 christos object. */
2759 1.1 christos h->plt.refcount++;
2760 1.1 christos }
2761 1.1 christos break;
2762 1.1 christos }
2763 1.1 christos /* Fall through. */
2764 1.1 christos case R_68K_8:
2765 1.1 christos case R_68K_16:
2766 1.1.1.2 christos case R_68K_32:
2767 1.1.1.2 christos /* We don't need to handle relocs into sections not going into
2768 1.1.1.2 christos the "real" output. */
2769 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
2770 1.1.1.2 christos break;
2771 1.1 christos
2772 1.1 christos if (h != NULL)
2773 1.1 christos {
2774 1.1 christos /* Make sure a plt entry is created for this symbol if it
2775 1.1 christos turns out to be a function defined by a dynamic object. */
2776 1.1 christos h->plt.refcount++;
2777 1.1.1.6 christos
2778 1.1 christos if (bfd_link_executable (info))
2779 1.1 christos /* This symbol needs a non-GOT reference. */
2780 1.1 christos h->non_got_ref = 1;
2781 1.1 christos }
2782 1.1 christos
2783 1.1 christos /* If we are creating a shared library, we need to copy the
2784 1.1.1.8 christos reloc into the shared library. */
2785 1.1.1.8 christos if (bfd_link_pic (info)
2786 1.1.1.8 christos && (h == NULL
2787 1.1 christos || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
2788 1.1 christos {
2789 1.1 christos /* When creating a shared object, we must copy these
2790 1.1 christos reloc types into the output file. We create a reloc
2791 1.1 christos section in dynobj and make room for this reloc. */
2792 1.1 christos if (sreloc == NULL)
2793 1.1 christos {
2794 1.1 christos sreloc = _bfd_elf_make_dynamic_reloc_section
2795 1.1 christos (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
2796 1.1 christos
2797 1.1 christos if (sreloc == NULL)
2798 1.1 christos return FALSE;
2799 1.1 christos }
2800 1.1 christos
2801 1.1 christos if (sec->flags & SEC_READONLY
2802 1.1 christos /* Don't set DF_TEXTREL yet for PC relative
2803 1.1 christos relocations, they might be discarded later. */
2804 1.1 christos && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2805 1.1 christos || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2806 1.1 christos || ELF32_R_TYPE (rel->r_info) == R_68K_PC32))
2807 1.1 christos info->flags |= DF_TEXTREL;
2808 1.1 christos
2809 1.1 christos sreloc->size += sizeof (Elf32_External_Rela);
2810 1.1 christos
2811 1.1 christos /* We count the number of PC relative relocations we have
2812 1.1 christos entered for this symbol, so that we can discard them
2813 1.1 christos again if, in the -Bsymbolic case, the symbol is later
2814 1.1 christos defined by a regular object, or, in the normal shared
2815 1.1 christos case, the symbol is forced to be local. Note that this
2816 1.1 christos function is only called if we are using an m68kelf linker
2817 1.1 christos hash table, which means that h is really a pointer to an
2818 1.1 christos elf_m68k_link_hash_entry. */
2819 1.1 christos if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2820 1.1 christos || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2821 1.1 christos || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
2822 1.1 christos {
2823 1.1 christos struct elf_m68k_pcrel_relocs_copied *p;
2824 1.1 christos struct elf_m68k_pcrel_relocs_copied **head;
2825 1.1 christos
2826 1.1 christos if (h != NULL)
2827 1.1 christos {
2828 1.1 christos struct elf_m68k_link_hash_entry *eh
2829 1.1 christos = elf_m68k_hash_entry (h);
2830 1.1 christos head = &eh->pcrel_relocs_copied;
2831 1.1 christos }
2832 1.1 christos else
2833 1.1 christos {
2834 1.1 christos asection *s;
2835 1.1 christos void *vpp;
2836 1.1 christos Elf_Internal_Sym *isym;
2837 1.1.1.9 christos
2838 1.1 christos isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->root.sym_cache,
2839 1.1 christos abfd, r_symndx);
2840 1.1 christos if (isym == NULL)
2841 1.1 christos return FALSE;
2842 1.1 christos
2843 1.1 christos s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2844 1.1 christos if (s == NULL)
2845 1.1 christos s = sec;
2846 1.1 christos
2847 1.1 christos vpp = &elf_section_data (s)->local_dynrel;
2848 1.1 christos head = (struct elf_m68k_pcrel_relocs_copied **) vpp;
2849 1.1 christos }
2850 1.1 christos
2851 1.1 christos for (p = *head; p != NULL; p = p->next)
2852 1.1 christos if (p->section == sreloc)
2853 1.1 christos break;
2854 1.1 christos
2855 1.1 christos if (p == NULL)
2856 1.1 christos {
2857 1.1 christos p = ((struct elf_m68k_pcrel_relocs_copied *)
2858 1.1 christos bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2859 1.1 christos if (p == NULL)
2860 1.1 christos return FALSE;
2861 1.1 christos p->next = *head;
2862 1.1 christos *head = p;
2863 1.1 christos p->section = sreloc;
2864 1.1 christos p->count = 0;
2865 1.1 christos }
2866 1.1 christos
2867 1.1 christos ++p->count;
2868 1.1 christos }
2869 1.1 christos }
2870 1.1 christos
2871 1.1 christos break;
2872 1.1 christos
2873 1.1 christos /* This relocation describes the C++ object vtable hierarchy.
2874 1.1 christos Reconstruct it for later use during GC. */
2875 1.1 christos case R_68K_GNU_VTINHERIT:
2876 1.1 christos if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2877 1.1 christos return FALSE;
2878 1.1 christos break;
2879 1.1 christos
2880 1.1 christos /* This relocation describes which C++ vtable entries are actually
2881 1.1 christos used. Record for later use during GC. */
2882 1.1.1.9 christos case R_68K_GNU_VTENTRY:
2883 1.1 christos if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2884 1.1 christos return FALSE;
2885 1.1 christos break;
2886 1.1 christos
2887 1.1 christos default:
2888 1.1 christos break;
2889 1.1 christos }
2890 1.1 christos }
2891 1.1 christos
2892 1.1 christos return TRUE;
2893 1.1 christos }
2894 1.1 christos
2895 1.1 christos /* Return the section that should be marked against GC for a given
2896 1.1 christos relocation. */
2897 1.1 christos
2898 1.1 christos static asection *
2899 1.1 christos elf_m68k_gc_mark_hook (asection *sec,
2900 1.1 christos struct bfd_link_info *info,
2901 1.1 christos Elf_Internal_Rela *rel,
2902 1.1 christos struct elf_link_hash_entry *h,
2903 1.1 christos Elf_Internal_Sym *sym)
2904 1.1 christos {
2905 1.1 christos if (h != NULL)
2906 1.1 christos switch (ELF32_R_TYPE (rel->r_info))
2907 1.1 christos {
2908 1.1 christos case R_68K_GNU_VTINHERIT:
2909 1.1 christos case R_68K_GNU_VTENTRY:
2910 1.1 christos return NULL;
2911 1.1 christos }
2912 1.1 christos
2913 1.1 christos return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2914 1.1 christos }
2915 1.1 christos
2916 1.1 christos /* Return the type of PLT associated with OUTPUT_BFD. */
2918 1.1 christos
2919 1.1 christos static const struct elf_m68k_plt_info *
2920 1.1 christos elf_m68k_get_plt_info (bfd *output_bfd)
2921 1.1 christos {
2922 1.1 christos unsigned int features;
2923 1.1 christos
2924 1.1 christos features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd));
2925 1.1 christos if (features & cpu32)
2926 1.1 christos return &elf_cpu32_plt_info;
2927 1.1 christos if (features & mcfisa_b)
2928 1.1 christos return &elf_isab_plt_info;
2929 1.1 christos if (features & mcfisa_c)
2930 1.1 christos return &elf_isac_plt_info;
2931 1.1 christos return &elf_m68k_plt_info;
2932 1.1 christos }
2933 1.1 christos
2934 1.1 christos /* This function is called after all the input files have been read,
2935 1.1 christos and the input sections have been assigned to output sections.
2936 1.1 christos It's a convenient place to determine the PLT style. */
2937 1.1 christos
2938 1.1 christos static bfd_boolean
2939 1.1 christos elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
2940 1.1 christos {
2941 1.1 christos /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got
2942 1.1 christos sections. */
2943 1.1 christos if (!elf_m68k_partition_multi_got (info))
2944 1.1 christos return FALSE;
2945 1.1 christos
2946 1.1 christos elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd);
2947 1.1 christos return TRUE;
2948 1.1 christos }
2949 1.1 christos
2950 1.1 christos /* Adjust a symbol defined by a dynamic object and referenced by a
2951 1.1 christos regular object. The current definition is in some section of the
2952 1.1 christos dynamic object, but we're not including those sections. We have to
2953 1.1 christos change the definition to something the rest of the link can
2954 1.1 christos understand. */
2955 1.1.1.2 christos
2956 1.1.1.2 christos static bfd_boolean
2957 1.1 christos elf_m68k_adjust_dynamic_symbol (struct bfd_link_info *info,
2958 1.1 christos struct elf_link_hash_entry *h)
2959 1.1 christos {
2960 1.1 christos struct elf_m68k_link_hash_table *htab;
2961 1.1 christos bfd *dynobj;
2962 1.1 christos asection *s;
2963 1.1.1.7 christos
2964 1.1 christos htab = elf_m68k_hash_table (info);
2965 1.1 christos dynobj = htab->root.dynobj;
2966 1.1 christos
2967 1.1 christos /* Make sure we know what is going on here. */
2968 1.1.1.8 christos BFD_ASSERT (dynobj != NULL
2969 1.1 christos && (h->needs_plt
2970 1.1 christos || h->is_weakalias
2971 1.1 christos || (h->def_dynamic
2972 1.1 christos && h->ref_regular
2973 1.1 christos && !h->def_regular)));
2974 1.1 christos
2975 1.1 christos /* If this is a function, put it in the procedure linkage table. We
2976 1.1 christos will fill in the contents of the procedure linkage table later,
2977 1.1 christos when we know the address of the .got section. */
2978 1.1 christos if (h->type == STT_FUNC
2979 1.1 christos || h->needs_plt)
2980 1.1.1.8 christos {
2981 1.1.1.8 christos if ((h->plt.refcount <= 0
2982 1.1.1.8 christos || SYMBOL_CALLS_LOCAL (info, h)
2983 1.1 christos || ((ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2984 1.1 christos || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2985 1.1 christos && h->root.type == bfd_link_hash_undefweak))
2986 1.1 christos /* We must always create the plt entry if it was referenced
2987 1.1 christos by a PLTxxO relocation. In this case we already recorded
2988 1.1 christos it as a dynamic symbol. */
2989 1.1 christos && h->dynindx == -1)
2990 1.1 christos {
2991 1.1 christos /* This case can occur if we saw a PLTxx reloc in an input
2992 1.1 christos file, but the symbol was never referred to by a dynamic
2993 1.1 christos object, or if all references were garbage collected. In
2994 1.1 christos such a case, we don't actually need to build a procedure
2995 1.1 christos linkage table, and we can just do a PCxx reloc instead. */
2996 1.1 christos h->plt.offset = (bfd_vma) -1;
2997 1.1 christos h->needs_plt = 0;
2998 1.1 christos return TRUE;
2999 1.1 christos }
3000 1.1 christos
3001 1.1 christos /* Make sure this symbol is output as a dynamic symbol. */
3002 1.1 christos if (h->dynindx == -1
3003 1.1 christos && !h->forced_local)
3004 1.1 christos {
3005 1.1 christos if (! bfd_elf_link_record_dynamic_symbol (info, h))
3006 1.1 christos return FALSE;
3007 1.1.1.7 christos }
3008 1.1 christos
3009 1.1 christos s = htab->root.splt;
3010 1.1 christos BFD_ASSERT (s != NULL);
3011 1.1 christos
3012 1.1 christos /* If this is the first .plt entry, make room for the special
3013 1.1 christos first entry. */
3014 1.1 christos if (s->size == 0)
3015 1.1 christos s->size = htab->plt_info->size;
3016 1.1 christos
3017 1.1 christos /* If this symbol is not defined in a regular file, and we are
3018 1.1 christos not generating a shared library, then set the symbol to this
3019 1.1 christos location in the .plt. This is required to make function
3020 1.1.1.6 christos pointers compare as equal between the normal executable and
3021 1.1 christos the shared library. */
3022 1.1 christos if (!bfd_link_pic (info)
3023 1.1 christos && !h->def_regular)
3024 1.1 christos {
3025 1.1 christos h->root.u.def.section = s;
3026 1.1 christos h->root.u.def.value = s->size;
3027 1.1 christos }
3028 1.1 christos
3029 1.1 christos h->plt.offset = s->size;
3030 1.1 christos
3031 1.1 christos /* Make room for this entry. */
3032 1.1 christos s->size += htab->plt_info->size;
3033 1.1 christos
3034 1.1.1.7 christos /* We also need to make an entry in the .got.plt section, which
3035 1.1 christos will be placed in the .got section by the linker script. */
3036 1.1 christos s = htab->root.sgotplt;
3037 1.1 christos BFD_ASSERT (s != NULL);
3038 1.1 christos s->size += 4;
3039 1.1.1.7 christos
3040 1.1 christos /* We also need to make an entry in the .rela.plt section. */
3041 1.1 christos s = htab->root.srelplt;
3042 1.1 christos BFD_ASSERT (s != NULL);
3043 1.1 christos s->size += sizeof (Elf32_External_Rela);
3044 1.1 christos
3045 1.1 christos return TRUE;
3046 1.1 christos }
3047 1.1 christos
3048 1.1 christos /* Reinitialize the plt offset now that it is not used as a reference
3049 1.1 christos count any more. */
3050 1.1 christos h->plt.offset = (bfd_vma) -1;
3051 1.1 christos
3052 1.1 christos /* If this is a weak symbol, and there is a real definition, the
3053 1.1.1.8 christos processor independent code will have arranged for us to see the
3054 1.1 christos real definition first, and we can just use the same value. */
3055 1.1.1.8 christos if (h->is_weakalias)
3056 1.1.1.8 christos {
3057 1.1.1.8 christos struct elf_link_hash_entry *def = weakdef (h);
3058 1.1.1.8 christos BFD_ASSERT (def->root.type == bfd_link_hash_defined);
3059 1.1 christos h->root.u.def.section = def->root.u.def.section;
3060 1.1 christos h->root.u.def.value = def->root.u.def.value;
3061 1.1 christos return TRUE;
3062 1.1 christos }
3063 1.1 christos
3064 1.1 christos /* This is a reference to a symbol defined by a dynamic object which
3065 1.1 christos is not a function. */
3066 1.1 christos
3067 1.1 christos /* If we are creating a shared library, we must presume that the
3068 1.1 christos only references to the symbol are via the global offset table.
3069 1.1.1.6 christos For such cases we need not do anything here; the relocations will
3070 1.1 christos be handled correctly by relocate_section. */
3071 1.1 christos if (bfd_link_pic (info))
3072 1.1 christos return TRUE;
3073 1.1 christos
3074 1.1 christos /* If there are no references to this symbol that do not use the
3075 1.1 christos GOT, we don't need to generate a copy reloc. */
3076 1.1 christos if (!h->non_got_ref)
3077 1.1 christos return TRUE;
3078 1.1 christos
3079 1.1 christos /* We must allocate the symbol in our .dynbss section, which will
3080 1.1 christos become part of the .bss section of the executable. There will be
3081 1.1 christos an entry for this symbol in the .dynsym section. The dynamic
3082 1.1 christos object will contain position independent code, so all references
3083 1.1 christos from the dynamic object to this symbol will go through the global
3084 1.1 christos offset table. The dynamic linker will use the .dynsym entry to
3085 1.1 christos determine the address it must put in the global offset table, so
3086 1.1 christos both the dynamic object and the regular object will refer to the
3087 1.1.1.2 christos same memory location for the variable. */
3088 1.1 christos
3089 1.1 christos s = bfd_get_linker_section (dynobj, ".dynbss");
3090 1.1 christos BFD_ASSERT (s != NULL);
3091 1.1 christos
3092 1.1 christos /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
3093 1.1 christos copy the initial value out of the dynamic object and into the
3094 1.1.1.2 christos runtime process image. We need to remember the offset into the
3095 1.1 christos .rela.bss section we are going to use. */
3096 1.1 christos if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3097 1.1 christos {
3098 1.1.1.2 christos asection *srel;
3099 1.1 christos
3100 1.1 christos srel = bfd_get_linker_section (dynobj, ".rela.bss");
3101 1.1 christos BFD_ASSERT (srel != NULL);
3102 1.1 christos srel->size += sizeof (Elf32_External_Rela);
3103 1.1 christos h->needs_copy = 1;
3104 1.1.1.4 christos }
3105 1.1 christos
3106 1.1 christos return _bfd_elf_adjust_dynamic_copy (info, h, s);
3107 1.1 christos }
3108 1.1 christos
3109 1.1 christos /* Set the sizes of the dynamic sections. */
3110 1.1.1.2 christos
3111 1.1.1.2 christos static bfd_boolean
3112 1.1 christos elf_m68k_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3113 1.1 christos struct bfd_link_info *info)
3114 1.1 christos {
3115 1.1 christos bfd *dynobj;
3116 1.1 christos asection *s;
3117 1.1 christos bfd_boolean relocs;
3118 1.1 christos
3119 1.1 christos dynobj = elf_hash_table (info)->dynobj;
3120 1.1 christos BFD_ASSERT (dynobj != NULL);
3121 1.1 christos
3122 1.1 christos if (elf_hash_table (info)->dynamic_sections_created)
3123 1.1.1.6 christos {
3124 1.1 christos /* Set the contents of the .interp section to the interpreter. */
3125 1.1.1.2 christos if (bfd_link_executable (info) && !info->nointerp)
3126 1.1 christos {
3127 1.1 christos s = bfd_get_linker_section (dynobj, ".interp");
3128 1.1 christos BFD_ASSERT (s != NULL);
3129 1.1 christos s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3130 1.1 christos s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3131 1.1 christos }
3132 1.1 christos }
3133 1.1 christos else
3134 1.1 christos {
3135 1.1 christos /* We may have created entries in the .rela.got section.
3136 1.1 christos However, if we are not creating the dynamic sections, we will
3137 1.1 christos not actually use these entries. Reset the size of .rela.got,
3138 1.1.1.7 christos which will cause it to get stripped from the output file
3139 1.1 christos below. */
3140 1.1 christos s = elf_hash_table (info)->srelgot;
3141 1.1 christos if (s != NULL)
3142 1.1 christos s->size = 0;
3143 1.1 christos }
3144 1.1 christos
3145 1.1 christos /* If this is a -Bsymbolic shared link, then we need to discard all
3146 1.1 christos PC relative relocs against symbols defined in a regular object.
3147 1.1 christos For the normal shared case we discard the PC relative relocs
3148 1.1 christos against symbols that have become local due to visibility changes.
3149 1.1.1.6 christos We allocated space for them in the check_relocs routine, but we
3150 1.1 christos will not fill them in in the relocate_section routine. */
3151 1.1 christos if (bfd_link_pic (info))
3152 1.1.1.2 christos elf_link_hash_traverse (elf_hash_table (info),
3153 1.1 christos elf_m68k_discard_copies,
3154 1.1 christos info);
3155 1.1 christos
3156 1.1 christos /* The check_relocs and adjust_dynamic_symbol entry points have
3157 1.1 christos determined the sizes of the various dynamic sections. Allocate
3158 1.1 christos memory for them. */
3159 1.1 christos relocs = FALSE;
3160 1.1 christos for (s = dynobj->sections; s != NULL; s = s->next)
3161 1.1 christos {
3162 1.1 christos const char *name;
3163 1.1 christos
3164 1.1 christos if ((s->flags & SEC_LINKER_CREATED) == 0)
3165 1.1 christos continue;
3166 1.1 christos
3167 1.1.1.9 christos /* It's OK to base decisions on the section name, because none
3168 1.1 christos of the dynobj section names depend upon the input files. */
3169 1.1 christos name = bfd_section_name (s);
3170 1.1 christos
3171 1.1 christos if (strcmp (name, ".plt") == 0)
3172 1.1.1.9 christos {
3173 1.1 christos /* Remember whether there is a PLT. */
3174 1.1 christos ;
3175 1.1 christos }
3176 1.1 christos else if (CONST_STRNEQ (name, ".rela"))
3177 1.1 christos {
3178 1.1 christos if (s->size != 0)
3179 1.1 christos {
3180 1.1 christos relocs = TRUE;
3181 1.1 christos
3182 1.1 christos /* We use the reloc_count field as a counter if we need
3183 1.1 christos to copy relocs into the output file. */
3184 1.1 christos s->reloc_count = 0;
3185 1.1 christos }
3186 1.1 christos }
3187 1.1 christos else if (! CONST_STRNEQ (name, ".got")
3188 1.1 christos && strcmp (name, ".dynbss") != 0)
3189 1.1 christos {
3190 1.1 christos /* It's not one of our sections, so don't allocate space. */
3191 1.1 christos continue;
3192 1.1 christos }
3193 1.1 christos
3194 1.1 christos if (s->size == 0)
3195 1.1 christos {
3196 1.1 christos /* If we don't need this section, strip it from the
3197 1.1 christos output file. This is mostly to handle .rela.bss and
3198 1.1 christos .rela.plt. We must create both sections in
3199 1.1 christos create_dynamic_sections, because they must be created
3200 1.1 christos before the linker maps input sections to output
3201 1.1 christos sections. The linker does that before
3202 1.1 christos adjust_dynamic_symbol is called, and it is that
3203 1.1 christos function which decides whether anything needs to go
3204 1.1 christos into these sections. */
3205 1.1 christos s->flags |= SEC_EXCLUDE;
3206 1.1 christos continue;
3207 1.1 christos }
3208 1.1 christos
3209 1.1 christos if ((s->flags & SEC_HAS_CONTENTS) == 0)
3210 1.1 christos continue;
3211 1.1 christos
3212 1.1 christos /* Allocate memory for the section contents. */
3213 1.1 christos /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3214 1.1 christos Unused entries should be reclaimed before the section's contents
3215 1.1 christos are written out, but at the moment this does not happen. Thus in
3216 1.1 christos order to prevent writing out garbage, we initialise the section's
3217 1.1 christos contents to zero. */
3218 1.1 christos s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3219 1.1 christos if (s->contents == NULL)
3220 1.1 christos return FALSE;
3221 1.1.1.9 christos }
3222 1.1 christos
3223 1.1 christos return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
3224 1.1 christos }
3225 1.1 christos
3226 1.1 christos /* This function is called via elf_link_hash_traverse if we are
3227 1.1 christos creating a shared object. In the -Bsymbolic case it discards the
3228 1.1 christos space allocated to copy PC relative relocs against symbols which
3229 1.1 christos are defined in regular objects. For the normal shared case, it
3230 1.1 christos discards space for pc-relative relocs that have become local due to
3231 1.1 christos symbol visibility changes. We allocated space for them in the
3232 1.1 christos check_relocs routine, but we won't fill them in in the
3233 1.1 christos relocate_section routine.
3234 1.1 christos
3235 1.1 christos We also check whether any of the remaining relocations apply
3236 1.1 christos against a readonly section, and set the DF_TEXTREL flag in this
3237 1.1 christos case. */
3238 1.1.1.2 christos
3239 1.1.1.2 christos static bfd_boolean
3240 1.1 christos elf_m68k_discard_copies (struct elf_link_hash_entry *h,
3241 1.1 christos void * inf)
3242 1.1 christos {
3243 1.1 christos struct bfd_link_info *info = (struct bfd_link_info *) inf;
3244 1.1 christos struct elf_m68k_pcrel_relocs_copied *s;
3245 1.1 christos
3246 1.1 christos if (!SYMBOL_CALLS_LOCAL (info, h))
3247 1.1 christos {
3248 1.1 christos if ((info->flags & DF_TEXTREL) == 0)
3249 1.1 christos {
3250 1.1 christos /* Look for relocations against read-only sections. */
3251 1.1 christos for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3252 1.1 christos s != NULL;
3253 1.1 christos s = s->next)
3254 1.1 christos if ((s->section->flags & SEC_READONLY) != 0)
3255 1.1 christos {
3256 1.1 christos info->flags |= DF_TEXTREL;
3257 1.1 christos break;
3258 1.1 christos }
3259 1.1.1.2 christos }
3260 1.1.1.2 christos
3261 1.1.1.2 christos /* Make sure undefined weak symbols are output as a dynamic symbol
3262 1.1.1.2 christos in PIEs. */
3263 1.1.1.2 christos if (h->non_got_ref
3264 1.1.1.2 christos && h->root.type == bfd_link_hash_undefweak
3265 1.1.1.2 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3266 1.1.1.2 christos && h->dynindx == -1
3267 1.1.1.2 christos && !h->forced_local)
3268 1.1.1.2 christos {
3269 1.1.1.2 christos if (! bfd_elf_link_record_dynamic_symbol (info, h))
3270 1.1.1.2 christos return FALSE;
3271 1.1 christos }
3272 1.1 christos
3273 1.1 christos return TRUE;
3274 1.1 christos }
3275 1.1 christos
3276 1.1 christos for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3277 1.1 christos s != NULL;
3278 1.1 christos s = s->next)
3279 1.1 christos s->section->size -= s->count * sizeof (Elf32_External_Rela);
3280 1.1 christos
3281 1.1 christos return TRUE;
3282 1.1 christos }
3283 1.1 christos
3284 1.1 christos
3285 1.1 christos /* Install relocation RELA. */
3286 1.1 christos
3287 1.1 christos static void
3288 1.1 christos elf_m68k_install_rela (bfd *output_bfd,
3289 1.1 christos asection *srela,
3290 1.1 christos Elf_Internal_Rela *rela)
3291 1.1 christos {
3292 1.1 christos bfd_byte *loc;
3293 1.1 christos
3294 1.1 christos loc = srela->contents;
3295 1.1 christos loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
3296 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, rela, loc);
3297 1.1 christos }
3298 1.1 christos
3299 1.1 christos /* Find the base offsets for thread-local storage in this object,
3300 1.1 christos for GD/LD and IE/LE respectively. */
3301 1.1 christos
3302 1.1 christos #define DTP_OFFSET 0x8000
3303 1.1 christos #define TP_OFFSET 0x7000
3304 1.1 christos
3305 1.1 christos static bfd_vma
3306 1.1 christos dtpoff_base (struct bfd_link_info *info)
3307 1.1 christos {
3308 1.1 christos /* If tls_sec is NULL, we should have signalled an error already. */
3309 1.1 christos if (elf_hash_table (info)->tls_sec == NULL)
3310 1.1 christos return 0;
3311 1.1 christos return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET;
3312 1.1 christos }
3313 1.1 christos
3314 1.1 christos static bfd_vma
3315 1.1 christos tpoff_base (struct bfd_link_info *info)
3316 1.1 christos {
3317 1.1 christos /* If tls_sec is NULL, we should have signalled an error already. */
3318 1.1 christos if (elf_hash_table (info)->tls_sec == NULL)
3319 1.1 christos return 0;
3320 1.1 christos return elf_hash_table (info)->tls_sec->vma + TP_OFFSET;
3321 1.1 christos }
3322 1.1 christos
3323 1.1 christos /* Output necessary relocation to handle a symbol during static link.
3324 1.1 christos This function is called from elf_m68k_relocate_section. */
3325 1.1 christos
3326 1.1 christos static void
3327 1.1 christos elf_m68k_init_got_entry_static (struct bfd_link_info *info,
3328 1.1 christos bfd *output_bfd,
3329 1.1 christos enum elf_m68k_reloc_type r_type,
3330 1.1 christos asection *sgot,
3331 1.1 christos bfd_vma got_entry_offset,
3332 1.1 christos bfd_vma relocation)
3333 1.1 christos {
3334 1.1 christos switch (elf_m68k_reloc_got_type (r_type))
3335 1.1 christos {
3336 1.1 christos case R_68K_GOT32O:
3337 1.1 christos bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset);
3338 1.1 christos break;
3339 1.1 christos
3340 1.1 christos case R_68K_TLS_GD32:
3341 1.1 christos /* We know the offset within the module,
3342 1.1 christos put it into the second GOT slot. */
3343 1.1 christos bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3344 1.1 christos sgot->contents + got_entry_offset + 4);
3345 1.1 christos /* FALLTHRU */
3346 1.1 christos
3347 1.1 christos case R_68K_TLS_LDM32:
3348 1.1 christos /* Mark it as belonging to module 1, the executable. */
3349 1.1 christos bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset);
3350 1.1 christos break;
3351 1.1 christos
3352 1.1 christos case R_68K_TLS_IE32:
3353 1.1 christos bfd_put_32 (output_bfd, relocation - tpoff_base (info),
3354 1.1 christos sgot->contents + got_entry_offset);
3355 1.1 christos break;
3356 1.1 christos
3357 1.1 christos default:
3358 1.1 christos BFD_ASSERT (FALSE);
3359 1.1 christos }
3360 1.1 christos }
3361 1.1 christos
3362 1.1 christos /* Output necessary relocation to handle a local symbol
3363 1.1 christos during dynamic link.
3364 1.1 christos This function is called either from elf_m68k_relocate_section
3365 1.1 christos or from elf_m68k_finish_dynamic_symbol. */
3366 1.1 christos
3367 1.1 christos static void
3368 1.1 christos elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info,
3369 1.1 christos bfd *output_bfd,
3370 1.1 christos enum elf_m68k_reloc_type r_type,
3371 1.1 christos asection *sgot,
3372 1.1 christos bfd_vma got_entry_offset,
3373 1.1 christos bfd_vma relocation,
3374 1.1 christos asection *srela)
3375 1.1 christos {
3376 1.1 christos Elf_Internal_Rela outrel;
3377 1.1 christos
3378 1.1 christos switch (elf_m68k_reloc_got_type (r_type))
3379 1.1 christos {
3380 1.1 christos case R_68K_GOT32O:
3381 1.1 christos /* Emit RELATIVE relocation to initialize GOT slot
3382 1.1 christos at run-time. */
3383 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
3384 1.1 christos outrel.r_addend = relocation;
3385 1.1 christos break;
3386 1.1 christos
3387 1.1 christos case R_68K_TLS_GD32:
3388 1.1 christos /* We know the offset within the module,
3389 1.1 christos put it into the second GOT slot. */
3390 1.1 christos bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3391 1.1 christos sgot->contents + got_entry_offset + 4);
3392 1.1 christos /* FALLTHRU */
3393 1.1 christos
3394 1.1 christos case R_68K_TLS_LDM32:
3395 1.1 christos /* We don't know the module number,
3396 1.1 christos create a relocation for it. */
3397 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32);
3398 1.1 christos outrel.r_addend = 0;
3399 1.1 christos break;
3400 1.1 christos
3401 1.1 christos case R_68K_TLS_IE32:
3402 1.1 christos /* Emit TPREL relocation to initialize GOT slot
3403 1.1 christos at run-time. */
3404 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32);
3405 1.1 christos outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma;
3406 1.1 christos break;
3407 1.1 christos
3408 1.1 christos default:
3409 1.1 christos BFD_ASSERT (FALSE);
3410 1.1 christos }
3411 1.1 christos
3412 1.1 christos /* Offset of the GOT entry. */
3413 1.1 christos outrel.r_offset = (sgot->output_section->vma
3414 1.1 christos + sgot->output_offset
3415 1.1 christos + got_entry_offset);
3416 1.1 christos
3417 1.1 christos /* Install one of the above relocations. */
3418 1.1 christos elf_m68k_install_rela (output_bfd, srela, &outrel);
3419 1.1 christos
3420 1.1 christos bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset);
3421 1.1 christos }
3422 1.1 christos
3423 1.1 christos /* Relocate an M68K ELF section. */
3424 1.1.1.2 christos
3425 1.1.1.2 christos static bfd_boolean
3426 1.1.1.2 christos elf_m68k_relocate_section (bfd *output_bfd,
3427 1.1.1.2 christos struct bfd_link_info *info,
3428 1.1.1.2 christos bfd *input_bfd,
3429 1.1.1.2 christos asection *input_section,
3430 1.1.1.2 christos bfd_byte *contents,
3431 1.1.1.2 christos Elf_Internal_Rela *relocs,
3432 1.1 christos Elf_Internal_Sym *local_syms,
3433 1.1 christos asection **local_sections)
3434 1.1 christos {
3435 1.1 christos Elf_Internal_Shdr *symtab_hdr;
3436 1.1 christos struct elf_link_hash_entry **sym_hashes;
3437 1.1 christos asection *sgot;
3438 1.1 christos asection *splt;
3439 1.1 christos asection *sreloc;
3440 1.1 christos asection *srela;
3441 1.1 christos struct elf_m68k_got *got;
3442 1.1 christos Elf_Internal_Rela *rel;
3443 1.1 christos Elf_Internal_Rela *relend;
3444 1.1 christos
3445 1.1 christos symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3446 1.1 christos sym_hashes = elf_sym_hashes (input_bfd);
3447 1.1 christos
3448 1.1 christos sgot = NULL;
3449 1.1 christos splt = NULL;
3450 1.1 christos sreloc = NULL;
3451 1.1 christos srela = NULL;
3452 1.1 christos
3453 1.1 christos got = NULL;
3454 1.1 christos
3455 1.1 christos rel = relocs;
3456 1.1 christos relend = relocs + input_section->reloc_count;
3457 1.1 christos for (; rel < relend; rel++)
3458 1.1 christos {
3459 1.1 christos int r_type;
3460 1.1 christos reloc_howto_type *howto;
3461 1.1 christos unsigned long r_symndx;
3462 1.1 christos struct elf_link_hash_entry *h;
3463 1.1 christos Elf_Internal_Sym *sym;
3464 1.1 christos asection *sec;
3465 1.1 christos bfd_vma relocation;
3466 1.1.1.8 christos bfd_boolean unresolved_reloc;
3467 1.1 christos bfd_reloc_status_type r;
3468 1.1 christos bfd_boolean resolved_to_zero;
3469 1.1 christos
3470 1.1 christos r_type = ELF32_R_TYPE (rel->r_info);
3471 1.1 christos if (r_type < 0 || r_type >= (int) R_68K_max)
3472 1.1 christos {
3473 1.1 christos bfd_set_error (bfd_error_bad_value);
3474 1.1 christos return FALSE;
3475 1.1 christos }
3476 1.1 christos howto = howto_table + r_type;
3477 1.1 christos
3478 1.1 christos r_symndx = ELF32_R_SYM (rel->r_info);
3479 1.1 christos
3480 1.1 christos h = NULL;
3481 1.1 christos sym = NULL;
3482 1.1 christos sec = NULL;
3483 1.1 christos unresolved_reloc = FALSE;
3484 1.1 christos
3485 1.1 christos if (r_symndx < symtab_hdr->sh_info)
3486 1.1 christos {
3487 1.1 christos sym = local_syms + r_symndx;
3488 1.1 christos sec = local_sections[r_symndx];
3489 1.1 christos relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3490 1.1 christos }
3491 1.1.1.3 christos else
3492 1.1 christos {
3493 1.1 christos bfd_boolean warned, ignored;
3494 1.1 christos
3495 1.1 christos RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3496 1.1.1.3 christos r_symndx, symtab_hdr, sym_hashes,
3497 1.1 christos h, sec, relocation,
3498 1.1 christos unresolved_reloc, warned, ignored);
3499 1.1.1.2 christos }
3500 1.1 christos
3501 1.1.1.2 christos if (sec != NULL && discarded_section (sec))
3502 1.1 christos RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3503 1.1.1.6 christos rel, 1, relend, howto, 0, contents);
3504 1.1 christos
3505 1.1 christos if (bfd_link_relocatable (info))
3506 1.1.1.8 christos continue;
3507 1.1.1.8 christos
3508 1.1.1.8 christos resolved_to_zero = (h != NULL
3509 1.1 christos && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
3510 1.1 christos
3511 1.1 christos switch (r_type)
3512 1.1 christos {
3513 1.1 christos case R_68K_GOT8:
3514 1.1 christos case R_68K_GOT16:
3515 1.1 christos case R_68K_GOT32:
3516 1.1 christos /* Relocation is to the address of the entry for this symbol
3517 1.1 christos in the global offset table. */
3518 1.1 christos if (h != NULL
3519 1.1 christos && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3520 1.1 christos {
3521 1.1 christos if (elf_m68k_hash_table (info)->local_gp_p)
3522 1.1 christos {
3523 1.1 christos bfd_vma sgot_output_offset;
3524 1.1.1.7 christos bfd_vma got_offset;
3525 1.1 christos
3526 1.1.1.7 christos sgot = elf_hash_table (info)->sgot;
3527 1.1 christos
3528 1.1.1.7 christos if (sgot != NULL)
3529 1.1.1.7 christos sgot_output_offset = sgot->output_offset;
3530 1.1.1.7 christos else
3531 1.1.1.7 christos /* In this case we have a reference to
3532 1.1.1.7 christos _GLOBAL_OFFSET_TABLE_, but the GOT itself is
3533 1.1.1.7 christos empty.
3534 1.1 christos ??? Issue a warning? */
3535 1.1 christos sgot_output_offset = 0;
3536 1.1 christos
3537 1.1 christos if (got == NULL)
3538 1.1 christos {
3539 1.1 christos struct elf_m68k_bfd2got_entry *bfd2got_entry;
3540 1.1 christos
3541 1.1 christos bfd2got_entry
3542 1.1 christos = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3543 1.1 christos input_bfd, SEARCH, NULL);
3544 1.1 christos
3545 1.1 christos if (bfd2got_entry != NULL)
3546 1.1 christos {
3547 1.1 christos got = bfd2got_entry->got;
3548 1.1 christos BFD_ASSERT (got != NULL);
3549 1.1 christos
3550 1.1 christos got_offset = got->offset;
3551 1.1 christos }
3552 1.1 christos else
3553 1.1 christos /* In this case we have a reference to
3554 1.1 christos _GLOBAL_OFFSET_TABLE_, but no other references
3555 1.1 christos accessing any GOT entries.
3556 1.1 christos ??? Issue a warning? */
3557 1.1 christos got_offset = 0;
3558 1.1 christos }
3559 1.1 christos else
3560 1.1 christos got_offset = got->offset;
3561 1.1 christos
3562 1.1 christos /* Adjust GOT pointer to point to the GOT
3563 1.1 christos assigned to input_bfd. */
3564 1.1 christos rel->r_addend += sgot_output_offset + got_offset;
3565 1.1 christos }
3566 1.1 christos else
3567 1.1 christos BFD_ASSERT (got == NULL || got->offset == 0);
3568 1.1 christos
3569 1.1 christos break;
3570 1.1 christos }
3571 1.1 christos /* Fall through. */
3572 1.1 christos case R_68K_GOT8O:
3573 1.1 christos case R_68K_GOT16O:
3574 1.1 christos case R_68K_GOT32O:
3575 1.1 christos
3576 1.1 christos case R_68K_TLS_LDM32:
3577 1.1 christos case R_68K_TLS_LDM16:
3578 1.1 christos case R_68K_TLS_LDM8:
3579 1.1 christos
3580 1.1 christos case R_68K_TLS_GD8:
3581 1.1 christos case R_68K_TLS_GD16:
3582 1.1 christos case R_68K_TLS_GD32:
3583 1.1 christos
3584 1.1 christos case R_68K_TLS_IE8:
3585 1.1 christos case R_68K_TLS_IE16:
3586 1.1 christos case R_68K_TLS_IE32:
3587 1.1 christos
3588 1.1 christos /* Relocation is the offset of the entry for this symbol in
3589 1.1 christos the global offset table. */
3590 1.1 christos
3591 1.1 christos {
3592 1.1 christos struct elf_m68k_got_entry_key key_;
3593 1.1 christos bfd_vma *off_ptr;
3594 1.1.1.7 christos bfd_vma off;
3595 1.1.1.7 christos
3596 1.1 christos sgot = elf_hash_table (info)->sgot;
3597 1.1 christos BFD_ASSERT (sgot != NULL);
3598 1.1.1.9 christos
3599 1.1.1.9 christos if (got == NULL)
3600 1.1.1.9 christos got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3601 1.1 christos input_bfd, MUST_FIND,
3602 1.1 christos NULL)->got;
3603 1.1 christos
3604 1.1 christos /* Get GOT offset for this symbol. */
3605 1.1 christos elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx,
3606 1.1 christos r_type);
3607 1.1 christos off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND,
3608 1.1 christos NULL)->u.s2.offset;
3609 1.1 christos off = *off_ptr;
3610 1.1 christos
3611 1.1 christos /* The offset must always be a multiple of 4. We use
3612 1.1 christos the least significant bit to record whether we have
3613 1.1 christos already generated the necessary reloc. */
3614 1.1 christos if ((off & 1) != 0)
3615 1.1 christos off &= ~1;
3616 1.1 christos else
3617 1.1 christos {
3618 1.1 christos if (h != NULL
3619 1.1 christos /* @TLSLDM relocations are bounded to the module, in
3620 1.1 christos which the symbol is defined -- not to the symbol
3621 1.1 christos itself. */
3622 1.1 christos && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32)
3623 1.1 christos {
3624 1.1 christos bfd_boolean dyn;
3625 1.1.1.6 christos
3626 1.1.1.6 christos dyn = elf_hash_table (info)->dynamic_sections_created;
3627 1.1.1.6 christos if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3628 1.1.1.6 christos bfd_link_pic (info),
3629 1.1 christos h)
3630 1.1.1.8 christos || (bfd_link_pic (info)
3631 1.1.1.8 christos && SYMBOL_REFERENCES_LOCAL (info, h))
3632 1.1 christos || ((ELF_ST_VISIBILITY (h->other)
3633 1.1 christos || resolved_to_zero)
3634 1.1 christos && h->root.type == bfd_link_hash_undefweak))
3635 1.1 christos {
3636 1.1 christos /* This is actually a static link, or it is a
3637 1.1 christos -Bsymbolic link and the symbol is defined
3638 1.1 christos locally, or the symbol was forced to be local
3639 1.1 christos because of a version file. We must initialize
3640 1.1 christos this entry in the global offset table. Since
3641 1.1 christos the offset must always be a multiple of 4, we
3642 1.1 christos use the least significant bit to record whether
3643 1.1 christos we have initialized it already.
3644 1.1 christos
3645 1.1 christos When doing a dynamic link, we create a .rela.got
3646 1.1 christos relocation entry to initialize the value. This
3647 1.1 christos is done in the finish_dynamic_symbol routine. */
3648 1.1 christos
3649 1.1 christos elf_m68k_init_got_entry_static (info,
3650 1.1 christos output_bfd,
3651 1.1 christos r_type,
3652 1.1 christos sgot,
3653 1.1 christos off,
3654 1.1 christos relocation);
3655 1.1 christos
3656 1.1 christos *off_ptr |= 1;
3657 1.1 christos }
3658 1.1 christos else
3659 1.1.1.6 christos unresolved_reloc = FALSE;
3660 1.1 christos }
3661 1.1 christos else if (bfd_link_pic (info)) /* && h == NULL */
3662 1.1.1.7 christos /* Process local symbol during dynamic link. */
3663 1.1.1.7 christos {
3664 1.1 christos srela = elf_hash_table (info)->srelgot;
3665 1.1 christos BFD_ASSERT (srela != NULL);
3666 1.1 christos
3667 1.1 christos elf_m68k_init_got_entry_local_shared (info,
3668 1.1 christos output_bfd,
3669 1.1 christos r_type,
3670 1.1 christos sgot,
3671 1.1 christos off,
3672 1.1 christos relocation,
3673 1.1 christos srela);
3674 1.1 christos
3675 1.1.1.6 christos *off_ptr |= 1;
3676 1.1 christos }
3677 1.1 christos else /* h == NULL && !bfd_link_pic (info) */
3678 1.1 christos {
3679 1.1 christos elf_m68k_init_got_entry_static (info,
3680 1.1 christos output_bfd,
3681 1.1 christos r_type,
3682 1.1 christos sgot,
3683 1.1 christos off,
3684 1.1 christos relocation);
3685 1.1 christos
3686 1.1 christos *off_ptr |= 1;
3687 1.1 christos }
3688 1.1 christos }
3689 1.1 christos
3690 1.1 christos /* We don't use elf_m68k_reloc_got_type in the condition below
3691 1.1 christos because this is the only place where difference between
3692 1.1 christos R_68K_GOTx and R_68K_GOTxO relocations matters. */
3693 1.1 christos if (r_type == R_68K_GOT32O
3694 1.1 christos || r_type == R_68K_GOT16O
3695 1.1 christos || r_type == R_68K_GOT8O
3696 1.1 christos || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32
3697 1.1 christos || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32
3698 1.1 christos || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32)
3699 1.1 christos {
3700 1.1 christos /* GOT pointer is adjusted to point to the start/middle
3701 1.1 christos of local GOT. Adjust the offset accordingly. */
3702 1.1 christos BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p
3703 1.1 christos || off >= got->offset);
3704 1.1 christos
3705 1.1 christos if (elf_m68k_hash_table (info)->local_gp_p)
3706 1.1 christos relocation = off - got->offset;
3707 1.1 christos else
3708 1.1 christos {
3709 1.1 christos BFD_ASSERT (got->offset == 0);
3710 1.1 christos relocation = sgot->output_offset + off;
3711 1.1 christos }
3712 1.1 christos
3713 1.1 christos /* This relocation does not use the addend. */
3714 1.1 christos rel->r_addend = 0;
3715 1.1 christos }
3716 1.1 christos else
3717 1.1 christos relocation = (sgot->output_section->vma + sgot->output_offset
3718 1.1 christos + off);
3719 1.1 christos }
3720 1.1 christos break;
3721 1.1 christos
3722 1.1 christos case R_68K_TLS_LDO32:
3723 1.1 christos case R_68K_TLS_LDO16:
3724 1.1 christos case R_68K_TLS_LDO8:
3725 1.1 christos relocation -= dtpoff_base (info);
3726 1.1 christos break;
3727 1.1 christos
3728 1.1 christos case R_68K_TLS_LE32:
3729 1.1.1.6 christos case R_68K_TLS_LE16:
3730 1.1 christos case R_68K_TLS_LE8:
3731 1.1.1.7 christos if (bfd_link_dll (info))
3732 1.1.1.7 christos {
3733 1.1.1.8 christos _bfd_error_handler
3734 1.1.1.8 christos /* xgettext:c-format */
3735 1.1.1.8 christos (_("%pB(%pA+%#" PRIx64 "): "
3736 1.1.1.8 christos "%s relocation not permitted in shared object"),
3737 1.1 christos input_bfd, input_section, (uint64_t) rel->r_offset,
3738 1.1 christos howto->name);
3739 1.1 christos
3740 1.1 christos return FALSE;
3741 1.1 christos }
3742 1.1 christos else
3743 1.1 christos relocation -= tpoff_base (info);
3744 1.1 christos
3745 1.1 christos break;
3746 1.1 christos
3747 1.1 christos case R_68K_PLT8:
3748 1.1 christos case R_68K_PLT16:
3749 1.1 christos case R_68K_PLT32:
3750 1.1 christos /* Relocation is to the entry for this symbol in the
3751 1.1 christos procedure linkage table. */
3752 1.1 christos
3753 1.1 christos /* Resolve a PLTxx reloc against a local symbol directly,
3754 1.1 christos without using the procedure linkage table. */
3755 1.1 christos if (h == NULL)
3756 1.1 christos break;
3757 1.1 christos
3758 1.1 christos if (h->plt.offset == (bfd_vma) -1
3759 1.1 christos || !elf_hash_table (info)->dynamic_sections_created)
3760 1.1 christos {
3761 1.1 christos /* We didn't make a PLT entry for this symbol. This
3762 1.1 christos happens when statically linking PIC code, or when
3763 1.1 christos using -Bsymbolic. */
3764 1.1 christos break;
3765 1.1.1.7 christos }
3766 1.1.1.7 christos
3767 1.1 christos splt = elf_hash_table (info)->splt;
3768 1.1 christos BFD_ASSERT (splt != NULL);
3769 1.1 christos
3770 1.1 christos relocation = (splt->output_section->vma
3771 1.1 christos + splt->output_offset
3772 1.1 christos + h->plt.offset);
3773 1.1 christos unresolved_reloc = FALSE;
3774 1.1 christos break;
3775 1.1 christos
3776 1.1 christos case R_68K_PLT8O:
3777 1.1 christos case R_68K_PLT16O:
3778 1.1 christos case R_68K_PLT32O:
3779 1.1 christos /* Relocation is the offset of the entry for this symbol in
3780 1.1 christos the procedure linkage table. */
3781 1.1.1.7 christos BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
3782 1.1.1.7 christos
3783 1.1 christos splt = elf_hash_table (info)->splt;
3784 1.1 christos BFD_ASSERT (splt != NULL);
3785 1.1 christos
3786 1.1 christos relocation = h->plt.offset;
3787 1.1 christos unresolved_reloc = FALSE;
3788 1.1 christos
3789 1.1 christos /* This relocation does not use the addend. */
3790 1.1 christos rel->r_addend = 0;
3791 1.1 christos
3792 1.1 christos break;
3793 1.1 christos
3794 1.1 christos case R_68K_8:
3795 1.1 christos case R_68K_16:
3796 1.1 christos case R_68K_32:
3797 1.1 christos case R_68K_PC8:
3798 1.1.1.6 christos case R_68K_PC16:
3799 1.1 christos case R_68K_PC32:
3800 1.1 christos if (bfd_link_pic (info)
3801 1.1 christos && r_symndx != STN_UNDEF
3802 1.1.1.8 christos && (input_section->flags & SEC_ALLOC) != 0
3803 1.1.1.8 christos && (h == NULL
3804 1.1 christos || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3805 1.1 christos && !resolved_to_zero)
3806 1.1 christos || h->root.type != bfd_link_hash_undefweak)
3807 1.1 christos && ((r_type != R_68K_PC8
3808 1.1 christos && r_type != R_68K_PC16
3809 1.1 christos && r_type != R_68K_PC32)
3810 1.1 christos || !SYMBOL_CALLS_LOCAL (info, h)))
3811 1.1 christos {
3812 1.1 christos Elf_Internal_Rela outrel;
3813 1.1 christos bfd_byte *loc;
3814 1.1 christos bfd_boolean skip, relocate;
3815 1.1 christos
3816 1.1 christos /* When generating a shared object, these relocations
3817 1.1 christos are copied into the output file to be resolved at run
3818 1.1 christos time. */
3819 1.1 christos
3820 1.1 christos skip = FALSE;
3821 1.1 christos relocate = FALSE;
3822 1.1 christos
3823 1.1 christos outrel.r_offset =
3824 1.1 christos _bfd_elf_section_offset (output_bfd, info, input_section,
3825 1.1 christos rel->r_offset);
3826 1.1 christos if (outrel.r_offset == (bfd_vma) -1)
3827 1.1 christos skip = TRUE;
3828 1.1 christos else if (outrel.r_offset == (bfd_vma) -2)
3829 1.1 christos skip = TRUE, relocate = TRUE;
3830 1.1 christos outrel.r_offset += (input_section->output_section->vma
3831 1.1 christos + input_section->output_offset);
3832 1.1 christos
3833 1.1 christos if (skip)
3834 1.1 christos memset (&outrel, 0, sizeof outrel);
3835 1.1 christos else if (h != NULL
3836 1.1 christos && h->dynindx != -1
3837 1.1 christos && (r_type == R_68K_PC8
3838 1.1.1.6 christos || r_type == R_68K_PC16
3839 1.1.1.6 christos || r_type == R_68K_PC32
3840 1.1 christos || !bfd_link_pic (info)
3841 1.1 christos || !SYMBOLIC_BIND (info, h)
3842 1.1 christos || !h->def_regular))
3843 1.1 christos {
3844 1.1 christos outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3845 1.1 christos outrel.r_addend = rel->r_addend;
3846 1.1 christos }
3847 1.1 christos else
3848 1.1 christos {
3849 1.1 christos /* This symbol is local, or marked to become local. */
3850 1.1 christos outrel.r_addend = relocation + rel->r_addend;
3851 1.1 christos
3852 1.1 christos if (r_type == R_68K_32)
3853 1.1 christos {
3854 1.1 christos relocate = TRUE;
3855 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
3856 1.1 christos }
3857 1.1 christos else
3858 1.1 christos {
3859 1.1 christos long indx;
3860 1.1 christos
3861 1.1 christos if (bfd_is_abs_section (sec))
3862 1.1 christos indx = 0;
3863 1.1 christos else if (sec == NULL || sec->owner == NULL)
3864 1.1 christos {
3865 1.1 christos bfd_set_error (bfd_error_bad_value);
3866 1.1 christos return FALSE;
3867 1.1 christos }
3868 1.1 christos else
3869 1.1 christos {
3870 1.1 christos asection *osec;
3871 1.1 christos
3872 1.1 christos /* We are turning this relocation into one
3873 1.1 christos against a section symbol. It would be
3874 1.1 christos proper to subtract the symbol's value,
3875 1.1 christos osec->vma, from the emitted reloc addend,
3876 1.1 christos but ld.so expects buggy relocs. */
3877 1.1 christos osec = sec->output_section;
3878 1.1 christos indx = elf_section_data (osec)->dynindx;
3879 1.1 christos if (indx == 0)
3880 1.1 christos {
3881 1.1 christos struct elf_link_hash_table *htab;
3882 1.1 christos htab = elf_hash_table (info);
3883 1.1 christos osec = htab->text_index_section;
3884 1.1 christos indx = elf_section_data (osec)->dynindx;
3885 1.1 christos }
3886 1.1 christos BFD_ASSERT (indx != 0);
3887 1.1 christos }
3888 1.1 christos
3889 1.1 christos outrel.r_info = ELF32_R_INFO (indx, r_type);
3890 1.1 christos }
3891 1.1 christos }
3892 1.1 christos
3893 1.1 christos sreloc = elf_section_data (input_section)->sreloc;
3894 1.1 christos if (sreloc == NULL)
3895 1.1 christos abort ();
3896 1.1 christos
3897 1.1 christos loc = sreloc->contents;
3898 1.1 christos loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3899 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3900 1.1.1.8 christos
3901 1.1.1.8 christos /* This reloc will be computed at runtime, so there's no
3902 1.1.1.8 christos need to do anything now, except for R_68K_32
3903 1.1 christos relocations that have been turned into
3904 1.1 christos R_68K_RELATIVE. */
3905 1.1 christos if (!relocate)
3906 1.1 christos continue;
3907 1.1 christos }
3908 1.1 christos
3909 1.1 christos break;
3910 1.1 christos
3911 1.1 christos case R_68K_GNU_VTINHERIT:
3912 1.1 christos case R_68K_GNU_VTENTRY:
3913 1.1 christos /* These are no-ops in the end. */
3914 1.1 christos continue;
3915 1.1 christos
3916 1.1 christos default:
3917 1.1 christos break;
3918 1.1 christos }
3919 1.1 christos
3920 1.1 christos /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3921 1.1 christos because such sections are not SEC_ALLOC and thus ld.so will
3922 1.1 christos not process them. */
3923 1.1.1.2 christos if (unresolved_reloc
3924 1.1.1.2 christos && !((input_section->flags & SEC_DEBUGGING) != 0
3925 1.1.1.2 christos && h->def_dynamic)
3926 1.1 christos && _bfd_elf_section_offset (output_bfd, info, input_section,
3927 1.1.1.7 christos rel->r_offset) != (bfd_vma) -1)
3928 1.1.1.7 christos {
3929 1.1.1.8 christos _bfd_error_handler
3930 1.1.1.8 christos /* xgettext:c-format */
3931 1.1 christos (_("%pB(%pA+%#" PRIx64 "): "
3932 1.1 christos "unresolvable %s relocation against symbol `%s'"),
3933 1.1.1.8 christos input_bfd,
3934 1.1 christos input_section,
3935 1.1 christos (uint64_t) rel->r_offset,
3936 1.1 christos howto->name,
3937 1.1 christos h->root.root.string);
3938 1.1 christos return FALSE;
3939 1.1 christos }
3940 1.1 christos
3941 1.1 christos if (r_symndx != STN_UNDEF
3942 1.1 christos && r_type != R_68K_NONE
3943 1.1 christos && (h == NULL
3944 1.1 christos || h->root.type == bfd_link_hash_defined
3945 1.1 christos || h->root.type == bfd_link_hash_defweak))
3946 1.1 christos {
3947 1.1 christos char sym_type;
3948 1.1 christos
3949 1.1 christos sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type;
3950 1.1 christos
3951 1.1 christos if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS))
3952 1.1 christos {
3953 1.1 christos const char *name;
3954 1.1 christos
3955 1.1 christos if (h != NULL)
3956 1.1 christos name = h->root.root.string;
3957 1.1 christos else
3958 1.1 christos {
3959 1.1 christos name = (bfd_elf_string_from_elf_section
3960 1.1.1.9 christos (input_bfd, symtab_hdr->sh_link, sym->st_name));
3961 1.1 christos if (name == NULL || *name == '\0')
3962 1.1 christos name = bfd_section_name (sec);
3963 1.1.1.7 christos }
3964 1.1 christos
3965 1.1.1.7 christos _bfd_error_handler
3966 1.1.1.8 christos ((sym_type == STT_TLS
3967 1.1.1.7 christos /* xgettext:c-format */
3968 1.1.1.8 christos ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s")
3969 1.1 christos /* xgettext:c-format */
3970 1.1 christos : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")),
3971 1.1.1.8 christos input_bfd,
3972 1.1 christos input_section,
3973 1.1 christos (uint64_t) rel->r_offset,
3974 1.1 christos howto->name,
3975 1.1 christos name);
3976 1.1 christos }
3977 1.1 christos }
3978 1.1 christos
3979 1.1 christos r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3980 1.1 christos contents, rel->r_offset,
3981 1.1 christos relocation, rel->r_addend);
3982 1.1 christos
3983 1.1 christos if (r != bfd_reloc_ok)
3984 1.1 christos {
3985 1.1 christos const char *name;
3986 1.1 christos
3987 1.1 christos if (h != NULL)
3988 1.1 christos name = h->root.root.string;
3989 1.1 christos else
3990 1.1 christos {
3991 1.1 christos name = bfd_elf_string_from_elf_section (input_bfd,
3992 1.1 christos symtab_hdr->sh_link,
3993 1.1 christos sym->st_name);
3994 1.1 christos if (name == NULL)
3995 1.1.1.9 christos return FALSE;
3996 1.1 christos if (*name == '\0')
3997 1.1 christos name = bfd_section_name (sec);
3998 1.1 christos }
3999 1.1.1.6 christos
4000 1.1.1.6 christos if (r == bfd_reloc_overflow)
4001 1.1.1.6 christos (*info->callbacks->reloc_overflow)
4002 1.1 christos (info, (h ? &h->root : NULL), name, howto->name,
4003 1.1 christos (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4004 1.1.1.7 christos else
4005 1.1.1.7 christos {
4006 1.1.1.8 christos _bfd_error_handler
4007 1.1 christos /* xgettext:c-format */
4008 1.1.1.8 christos (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
4009 1.1 christos input_bfd, input_section,
4010 1.1 christos (uint64_t) rel->r_offset, name, (int) r);
4011 1.1 christos return FALSE;
4012 1.1 christos }
4013 1.1 christos }
4014 1.1 christos }
4015 1.1 christos
4016 1.1 christos return TRUE;
4017 1.1 christos }
4018 1.1 christos
4019 1.1 christos /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET
4020 1.1 christos into section SEC. */
4021 1.1 christos
4022 1.1 christos static void
4023 1.1 christos elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value)
4024 1.1 christos {
4025 1.1 christos /* Make VALUE PC-relative. */
4026 1.1 christos value -= sec->output_section->vma + offset;
4027 1.1 christos
4028 1.1 christos /* Apply any in-place addend. */
4029 1.1 christos value += bfd_get_32 (sec->owner, sec->contents + offset);
4030 1.1 christos
4031 1.1 christos bfd_put_32 (sec->owner, value, sec->contents + offset);
4032 1.1 christos }
4033 1.1 christos
4034 1.1 christos /* Finish up dynamic symbol handling. We set the contents of various
4035 1.1 christos dynamic sections here. */
4036 1.1.1.2 christos
4037 1.1.1.2 christos static bfd_boolean
4038 1.1.1.2 christos elf_m68k_finish_dynamic_symbol (bfd *output_bfd,
4039 1.1.1.2 christos struct bfd_link_info *info,
4040 1.1 christos struct elf_link_hash_entry *h,
4041 1.1 christos Elf_Internal_Sym *sym)
4042 1.1 christos {
4043 1.1 christos bfd *dynobj;
4044 1.1 christos
4045 1.1 christos dynobj = elf_hash_table (info)->dynobj;
4046 1.1 christos
4047 1.1 christos if (h->plt.offset != (bfd_vma) -1)
4048 1.1 christos {
4049 1.1 christos const struct elf_m68k_plt_info *plt_info;
4050 1.1 christos asection *splt;
4051 1.1 christos asection *sgot;
4052 1.1 christos asection *srela;
4053 1.1 christos bfd_vma plt_index;
4054 1.1 christos bfd_vma got_offset;
4055 1.1 christos Elf_Internal_Rela rela;
4056 1.1 christos bfd_byte *loc;
4057 1.1 christos
4058 1.1 christos /* This symbol has an entry in the procedure linkage table. Set
4059 1.1 christos it up. */
4060 1.1 christos
4061 1.1 christos BFD_ASSERT (h->dynindx != -1);
4062 1.1.1.7 christos
4063 1.1.1.7 christos plt_info = elf_m68k_hash_table (info)->plt_info;
4064 1.1.1.7 christos splt = elf_hash_table (info)->splt;
4065 1.1 christos sgot = elf_hash_table (info)->sgotplt;
4066 1.1 christos srela = elf_hash_table (info)->srelplt;
4067 1.1 christos BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
4068 1.1 christos
4069 1.1 christos /* Get the index in the procedure linkage table which
4070 1.1 christos corresponds to this symbol. This is the index of this symbol
4071 1.1 christos in all the symbols for which we are making plt entries. The
4072 1.1 christos first entry in the procedure linkage table is reserved. */
4073 1.1 christos plt_index = (h->plt.offset / plt_info->size) - 1;
4074 1.1 christos
4075 1.1 christos /* Get the offset into the .got table of the entry that
4076 1.1 christos corresponds to this function. Each .got entry is 4 bytes.
4077 1.1 christos The first three are reserved. */
4078 1.1 christos got_offset = (plt_index + 3) * 4;
4079 1.1 christos
4080 1.1 christos memcpy (splt->contents + h->plt.offset,
4081 1.1 christos plt_info->symbol_entry,
4082 1.1 christos plt_info->size);
4083 1.1 christos
4084 1.1 christos elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got,
4085 1.1 christos (sgot->output_section->vma
4086 1.1 christos + sgot->output_offset
4087 1.1 christos + got_offset));
4088 1.1 christos
4089 1.1 christos bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4090 1.1 christos splt->contents
4091 1.1 christos + h->plt.offset
4092 1.1 christos + plt_info->symbol_resolve_entry + 2);
4093 1.1 christos
4094 1.1 christos elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt,
4095 1.1 christos splt->output_section->vma);
4096 1.1 christos
4097 1.1 christos /* Fill in the entry in the global offset table. */
4098 1.1 christos bfd_put_32 (output_bfd,
4099 1.1 christos (splt->output_section->vma
4100 1.1 christos + splt->output_offset
4101 1.1 christos + h->plt.offset
4102 1.1 christos + plt_info->symbol_resolve_entry),
4103 1.1 christos sgot->contents + got_offset);
4104 1.1 christos
4105 1.1 christos /* Fill in the entry in the .rela.plt section. */
4106 1.1 christos rela.r_offset = (sgot->output_section->vma
4107 1.1 christos + sgot->output_offset
4108 1.1 christos + got_offset);
4109 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
4110 1.1 christos rela.r_addend = 0;
4111 1.1 christos loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
4112 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4113 1.1 christos
4114 1.1 christos if (!h->def_regular)
4115 1.1 christos {
4116 1.1 christos /* Mark the symbol as undefined, rather than as defined in
4117 1.1 christos the .plt section. Leave the value alone. */
4118 1.1 christos sym->st_shndx = SHN_UNDEF;
4119 1.1 christos }
4120 1.1 christos }
4121 1.1 christos
4122 1.1 christos if (elf_m68k_hash_entry (h)->glist != NULL)
4123 1.1 christos {
4124 1.1 christos asection *sgot;
4125 1.1 christos asection *srela;
4126 1.1 christos struct elf_m68k_got_entry *got_entry;
4127 1.1 christos
4128 1.1 christos /* This symbol has an entry in the global offset table. Set it
4129 1.1.1.7 christos up. */
4130 1.1.1.7 christos
4131 1.1 christos sgot = elf_hash_table (info)->sgot;
4132 1.1 christos srela = elf_hash_table (info)->srelgot;
4133 1.1 christos BFD_ASSERT (sgot != NULL && srela != NULL);
4134 1.1 christos
4135 1.1 christos got_entry = elf_m68k_hash_entry (h)->glist;
4136 1.1 christos
4137 1.1 christos while (got_entry != NULL)
4138 1.1 christos {
4139 1.1 christos enum elf_m68k_reloc_type r_type;
4140 1.1 christos bfd_vma got_entry_offset;
4141 1.1 christos
4142 1.1 christos r_type = got_entry->key_.type;
4143 1.1 christos got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1;
4144 1.1 christos
4145 1.1 christos /* If this is a -Bsymbolic link, and the symbol is defined
4146 1.1 christos locally, we just want to emit a RELATIVE reloc. Likewise if
4147 1.1 christos the symbol was forced to be local because of a version file.
4148 1.1.1.6 christos The entry in the global offset table already have been
4149 1.1 christos initialized in the relocate_section function. */
4150 1.1 christos if (bfd_link_pic (info)
4151 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))
4152 1.1 christos {
4153 1.1 christos bfd_vma relocation;
4154 1.1 christos
4155 1.1 christos relocation = bfd_get_signed_32 (output_bfd,
4156 1.1 christos (sgot->contents
4157 1.1 christos + got_entry_offset));
4158 1.1 christos
4159 1.1 christos /* Undo TP bias. */
4160 1.1 christos switch (elf_m68k_reloc_got_type (r_type))
4161 1.1 christos {
4162 1.1 christos case R_68K_GOT32O:
4163 1.1 christos case R_68K_TLS_LDM32:
4164 1.1 christos break;
4165 1.1 christos
4166 1.1 christos case R_68K_TLS_GD32:
4167 1.1 christos /* The value for this relocation is actually put in
4168 1.1 christos the second GOT slot. */
4169 1.1 christos relocation = bfd_get_signed_32 (output_bfd,
4170 1.1 christos (sgot->contents
4171 1.1 christos + got_entry_offset + 4));
4172 1.1 christos relocation += dtpoff_base (info);
4173 1.1 christos break;
4174 1.1 christos
4175 1.1 christos case R_68K_TLS_IE32:
4176 1.1 christos relocation += tpoff_base (info);
4177 1.1 christos break;
4178 1.1 christos
4179 1.1 christos default:
4180 1.1 christos BFD_ASSERT (FALSE);
4181 1.1 christos }
4182 1.1 christos
4183 1.1 christos elf_m68k_init_got_entry_local_shared (info,
4184 1.1 christos output_bfd,
4185 1.1 christos r_type,
4186 1.1 christos sgot,
4187 1.1 christos got_entry_offset,
4188 1.1 christos relocation,
4189 1.1 christos srela);
4190 1.1 christos }
4191 1.1 christos else
4192 1.1 christos {
4193 1.1 christos Elf_Internal_Rela rela;
4194 1.1 christos
4195 1.1 christos /* Put zeros to GOT slots that will be initialized
4196 1.1 christos at run-time. */
4197 1.1 christos {
4198 1.1 christos bfd_vma n_slots;
4199 1.1 christos
4200 1.1 christos n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type);
4201 1.1 christos while (n_slots--)
4202 1.1 christos bfd_put_32 (output_bfd, (bfd_vma) 0,
4203 1.1 christos (sgot->contents + got_entry_offset
4204 1.1 christos + 4 * n_slots));
4205 1.1 christos }
4206 1.1 christos
4207 1.1 christos rela.r_addend = 0;
4208 1.1 christos rela.r_offset = (sgot->output_section->vma
4209 1.1 christos + sgot->output_offset
4210 1.1 christos + got_entry_offset);
4211 1.1 christos
4212 1.1 christos switch (elf_m68k_reloc_got_type (r_type))
4213 1.1 christos {
4214 1.1 christos case R_68K_GOT32O:
4215 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
4216 1.1 christos elf_m68k_install_rela (output_bfd, srela, &rela);
4217 1.1 christos break;
4218 1.1 christos
4219 1.1 christos case R_68K_TLS_GD32:
4220 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32);
4221 1.1 christos elf_m68k_install_rela (output_bfd, srela, &rela);
4222 1.1 christos
4223 1.1 christos rela.r_offset += 4;
4224 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32);
4225 1.1 christos elf_m68k_install_rela (output_bfd, srela, &rela);
4226 1.1 christos break;
4227 1.1 christos
4228 1.1 christos case R_68K_TLS_IE32:
4229 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32);
4230 1.1 christos elf_m68k_install_rela (output_bfd, srela, &rela);
4231 1.1 christos break;
4232 1.1 christos
4233 1.1 christos default:
4234 1.1 christos BFD_ASSERT (FALSE);
4235 1.1 christos break;
4236 1.1 christos }
4237 1.1 christos }
4238 1.1 christos
4239 1.1 christos got_entry = got_entry->u.s2.next;
4240 1.1 christos }
4241 1.1 christos }
4242 1.1 christos
4243 1.1 christos if (h->needs_copy)
4244 1.1 christos {
4245 1.1 christos asection *s;
4246 1.1 christos Elf_Internal_Rela rela;
4247 1.1 christos bfd_byte *loc;
4248 1.1 christos
4249 1.1 christos /* This symbol needs a copy reloc. Set it up. */
4250 1.1 christos
4251 1.1 christos BFD_ASSERT (h->dynindx != -1
4252 1.1 christos && (h->root.type == bfd_link_hash_defined
4253 1.1.1.2 christos || h->root.type == bfd_link_hash_defweak));
4254 1.1 christos
4255 1.1 christos s = bfd_get_linker_section (dynobj, ".rela.bss");
4256 1.1 christos BFD_ASSERT (s != NULL);
4257 1.1 christos
4258 1.1 christos rela.r_offset = (h->root.u.def.value
4259 1.1 christos + h->root.u.def.section->output_section->vma
4260 1.1 christos + h->root.u.def.section->output_offset);
4261 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
4262 1.1 christos rela.r_addend = 0;
4263 1.1 christos loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4264 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4265 1.1 christos }
4266 1.1 christos
4267 1.1 christos return TRUE;
4268 1.1 christos }
4269 1.1 christos
4270 1.1 christos /* Finish up the dynamic sections. */
4271 1.1.1.2 christos
4272 1.1 christos static bfd_boolean
4273 1.1 christos elf_m68k_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
4274 1.1 christos {
4275 1.1 christos bfd *dynobj;
4276 1.1 christos asection *sgot;
4277 1.1 christos asection *sdyn;
4278 1.1 christos
4279 1.1.1.7 christos dynobj = elf_hash_table (info)->dynobj;
4280 1.1 christos
4281 1.1.1.2 christos sgot = elf_hash_table (info)->sgotplt;
4282 1.1 christos BFD_ASSERT (sgot != NULL);
4283 1.1 christos sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4284 1.1 christos
4285 1.1 christos if (elf_hash_table (info)->dynamic_sections_created)
4286 1.1 christos {
4287 1.1 christos asection *splt;
4288 1.1.1.7 christos Elf32_External_Dyn *dyncon, *dynconend;
4289 1.1 christos
4290 1.1 christos splt = elf_hash_table (info)->splt;
4291 1.1 christos BFD_ASSERT (splt != NULL && sdyn != NULL);
4292 1.1 christos
4293 1.1 christos dyncon = (Elf32_External_Dyn *) sdyn->contents;
4294 1.1 christos dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4295 1.1 christos for (; dyncon < dynconend; dyncon++)
4296 1.1 christos {
4297 1.1 christos Elf_Internal_Dyn dyn;
4298 1.1 christos asection *s;
4299 1.1 christos
4300 1.1 christos bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4301 1.1 christos
4302 1.1 christos switch (dyn.d_tag)
4303 1.1 christos {
4304 1.1 christos default:
4305 1.1 christos break;
4306 1.1.1.7 christos
4307 1.1 christos case DT_PLTGOT:
4308 1.1 christos s = elf_hash_table (info)->sgotplt;
4309 1.1.1.7 christos goto get_vma;
4310 1.1 christos case DT_JMPREL:
4311 1.1.1.6 christos s = elf_hash_table (info)->srelplt;
4312 1.1 christos get_vma:
4313 1.1 christos dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4314 1.1 christos bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4315 1.1 christos break;
4316 1.1.1.7 christos
4317 1.1 christos case DT_PLTRELSZ:
4318 1.1 christos s = elf_hash_table (info)->srelplt;
4319 1.1 christos dyn.d_un.d_val = s->size;
4320 1.1 christos bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4321 1.1 christos break;
4322 1.1 christos }
4323 1.1 christos }
4324 1.1 christos
4325 1.1 christos /* Fill in the first entry in the procedure linkage table. */
4326 1.1 christos if (splt->size > 0)
4327 1.1 christos {
4328 1.1 christos const struct elf_m68k_plt_info *plt_info;
4329 1.1 christos
4330 1.1 christos plt_info = elf_m68k_hash_table (info)->plt_info;
4331 1.1 christos memcpy (splt->contents, plt_info->plt0_entry, plt_info->size);
4332 1.1 christos
4333 1.1 christos elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4,
4334 1.1 christos (sgot->output_section->vma
4335 1.1 christos + sgot->output_offset
4336 1.1 christos + 4));
4337 1.1 christos
4338 1.1 christos elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8,
4339 1.1 christos (sgot->output_section->vma
4340 1.1 christos + sgot->output_offset
4341 1.1 christos + 8));
4342 1.1 christos
4343 1.1 christos elf_section_data (splt->output_section)->this_hdr.sh_entsize
4344 1.1 christos = plt_info->size;
4345 1.1 christos }
4346 1.1 christos }
4347 1.1 christos
4348 1.1 christos /* Fill in the first three entries in the global offset table. */
4349 1.1 christos if (sgot->size > 0)
4350 1.1 christos {
4351 1.1 christos if (sdyn == NULL)
4352 1.1 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4353 1.1 christos else
4354 1.1 christos bfd_put_32 (output_bfd,
4355 1.1 christos sdyn->output_section->vma + sdyn->output_offset,
4356 1.1 christos sgot->contents);
4357 1.1 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4358 1.1 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4359 1.1 christos }
4360 1.1 christos
4361 1.1 christos elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4362 1.1 christos
4363 1.1 christos return TRUE;
4364 1.1 christos }
4365 1.1 christos
4366 1.1 christos /* Given a .data section and a .emreloc in-memory section, store
4367 1.1 christos relocation information into the .emreloc section which can be
4368 1.1 christos used at runtime to relocate the section. This is called by the
4369 1.1 christos linker when the --embedded-relocs switch is used. This is called
4370 1.1 christos after the add_symbols entry point has been called for all the
4371 1.1 christos objects, and before the final_link entry point is called. */
4372 1.1.1.6 christos
4373 1.1.1.6 christos bfd_boolean
4374 1.1.1.6 christos bfd_m68k_elf32_create_embedded_relocs (bfd *abfd, struct bfd_link_info *info,
4375 1.1 christos asection *datasec, asection *relsec,
4376 1.1 christos char **errmsg)
4377 1.1 christos {
4378 1.1 christos Elf_Internal_Shdr *symtab_hdr;
4379 1.1 christos Elf_Internal_Sym *isymbuf = NULL;
4380 1.1 christos Elf_Internal_Rela *internal_relocs = NULL;
4381 1.1 christos Elf_Internal_Rela *irel, *irelend;
4382 1.1 christos bfd_byte *p;
4383 1.1.1.6 christos bfd_size_type amt;
4384 1.1 christos
4385 1.1 christos BFD_ASSERT (! bfd_link_relocatable (info));
4386 1.1 christos
4387 1.1 christos *errmsg = NULL;
4388 1.1 christos
4389 1.1 christos if (datasec->reloc_count == 0)
4390 1.1 christos return TRUE;
4391 1.1 christos
4392 1.1 christos symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4393 1.1 christos
4394 1.1.1.2 christos /* Get a copy of the native relocations. */
4395 1.1 christos internal_relocs = (_bfd_elf_link_read_relocs
4396 1.1 christos (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
4397 1.1 christos info->keep_memory));
4398 1.1 christos if (internal_relocs == NULL)
4399 1.1 christos goto error_return;
4400 1.1 christos
4401 1.1 christos amt = (bfd_size_type) datasec->reloc_count * 12;
4402 1.1 christos relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
4403 1.1 christos if (relsec->contents == NULL)
4404 1.1 christos goto error_return;
4405 1.1 christos
4406 1.1 christos p = relsec->contents;
4407 1.1 christos
4408 1.1 christos irelend = internal_relocs + datasec->reloc_count;
4409 1.1 christos for (irel = internal_relocs; irel < irelend; irel++, p += 12)
4410 1.1 christos {
4411 1.1 christos asection *targetsec;
4412 1.1 christos
4413 1.1 christos /* We are going to write a four byte longword into the runtime
4414 1.1 christos reloc section. The longword will be the address in the data
4415 1.1 christos section which must be relocated. It is followed by the name
4416 1.1 christos of the target section NUL-padded or truncated to 8
4417 1.1 christos characters. */
4418 1.1 christos
4419 1.1 christos /* We can only relocate absolute longword relocs at run time. */
4420 1.1.1.8 christos if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32)
4421 1.1 christos {
4422 1.1 christos *errmsg = _("unsupported relocation type");
4423 1.1 christos bfd_set_error (bfd_error_bad_value);
4424 1.1 christos goto error_return;
4425 1.1 christos }
4426 1.1 christos
4427 1.1 christos /* Get the target section referred to by the reloc. */
4428 1.1 christos if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4429 1.1 christos {
4430 1.1 christos /* A local symbol. */
4431 1.1 christos Elf_Internal_Sym *isym;
4432 1.1 christos
4433 1.1 christos /* Read this BFD's local symbols if we haven't done so already. */
4434 1.1 christos if (isymbuf == NULL)
4435 1.1 christos {
4436 1.1 christos isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4437 1.1 christos if (isymbuf == NULL)
4438 1.1 christos isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4439 1.1 christos symtab_hdr->sh_info, 0,
4440 1.1 christos NULL, NULL, NULL);
4441 1.1 christos if (isymbuf == NULL)
4442 1.1 christos goto error_return;
4443 1.1 christos }
4444 1.1 christos
4445 1.1 christos isym = isymbuf + ELF32_R_SYM (irel->r_info);
4446 1.1 christos targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4447 1.1 christos }
4448 1.1 christos else
4449 1.1 christos {
4450 1.1 christos unsigned long indx;
4451 1.1 christos struct elf_link_hash_entry *h;
4452 1.1 christos
4453 1.1 christos /* An external symbol. */
4454 1.1 christos indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4455 1.1 christos h = elf_sym_hashes (abfd)[indx];
4456 1.1 christos BFD_ASSERT (h != NULL);
4457 1.1 christos if (h->root.type == bfd_link_hash_defined
4458 1.1 christos || h->root.type == bfd_link_hash_defweak)
4459 1.1 christos targetsec = h->root.u.def.section;
4460 1.1 christos else
4461 1.1 christos targetsec = NULL;
4462 1.1 christos }
4463 1.1 christos
4464 1.1 christos bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
4465 1.1 christos memset (p + 4, 0, 8);
4466 1.1 christos if (targetsec != NULL)
4467 1.1 christos strncpy ((char *) p + 4, targetsec->output_section->name, 8);
4468 1.1.1.9 christos }
4469 1.1 christos
4470 1.1.1.9 christos if (symtab_hdr->contents != (unsigned char *) isymbuf)
4471 1.1 christos free (isymbuf);
4472 1.1 christos if (elf_section_data (datasec)->relocs != internal_relocs)
4473 1.1 christos free (internal_relocs);
4474 1.1.1.9 christos return TRUE;
4475 1.1.1.9 christos
4476 1.1 christos error_return:
4477 1.1.1.9 christos if (symtab_hdr->contents != (unsigned char *) isymbuf)
4478 1.1 christos free (isymbuf);
4479 1.1 christos if (elf_section_data (datasec)->relocs != internal_relocs)
4480 1.1 christos free (internal_relocs);
4481 1.1 christos return FALSE;
4482 1.1 christos }
4483 1.1 christos
4484 1.1 christos /* Set target options. */
4485 1.1 christos
4486 1.1 christos void
4487 1.1 christos bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling)
4488 1.1 christos {
4489 1.1 christos struct elf_m68k_link_hash_table *htab;
4490 1.1 christos bfd_boolean use_neg_got_offsets_p;
4491 1.1 christos bfd_boolean allow_multigot_p;
4492 1.1 christos bfd_boolean local_gp_p;
4493 1.1 christos
4494 1.1 christos switch (got_handling)
4495 1.1 christos {
4496 1.1 christos case 0:
4497 1.1 christos /* --got=single. */
4498 1.1 christos local_gp_p = FALSE;
4499 1.1 christos use_neg_got_offsets_p = FALSE;
4500 1.1 christos allow_multigot_p = FALSE;
4501 1.1 christos break;
4502 1.1 christos
4503 1.1 christos case 1:
4504 1.1 christos /* --got=negative. */
4505 1.1 christos local_gp_p = TRUE;
4506 1.1 christos use_neg_got_offsets_p = TRUE;
4507 1.1 christos allow_multigot_p = FALSE;
4508 1.1 christos break;
4509 1.1 christos
4510 1.1 christos case 2:
4511 1.1 christos /* --got=multigot. */
4512 1.1 christos local_gp_p = TRUE;
4513 1.1 christos use_neg_got_offsets_p = TRUE;
4514 1.1 christos allow_multigot_p = TRUE;
4515 1.1 christos break;
4516 1.1 christos
4517 1.1 christos default:
4518 1.1 christos BFD_ASSERT (FALSE);
4519 1.1 christos return;
4520 1.1 christos }
4521 1.1 christos
4522 1.1 christos htab = elf_m68k_hash_table (info);
4523 1.1 christos if (htab != NULL)
4524 1.1 christos {
4525 1.1 christos htab->local_gp_p = local_gp_p;
4526 1.1 christos htab->use_neg_got_offsets_p = use_neg_got_offsets_p;
4527 1.1 christos htab->allow_multigot_p = allow_multigot_p;
4528 1.1 christos }
4529 1.1 christos }
4530 1.1.1.3 christos
4531 1.1.1.3 christos static enum elf_reloc_type_class
4532 1.1.1.3 christos elf32_m68k_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4533 1.1 christos const asection *rel_sec ATTRIBUTE_UNUSED,
4534 1.1 christos const Elf_Internal_Rela *rela)
4535 1.1 christos {
4536 1.1 christos switch ((int) ELF32_R_TYPE (rela->r_info))
4537 1.1 christos {
4538 1.1 christos case R_68K_RELATIVE:
4539 1.1 christos return reloc_class_relative;
4540 1.1 christos case R_68K_JMP_SLOT:
4541 1.1 christos return reloc_class_plt;
4542 1.1 christos case R_68K_COPY:
4543 1.1 christos return reloc_class_copy;
4544 1.1 christos default:
4545 1.1 christos return reloc_class_normal;
4546 1.1 christos }
4547 1.1 christos }
4548 1.1 christos
4549 1.1 christos /* Return address for Ith PLT stub in section PLT, for relocation REL
4550 1.1 christos or (bfd_vma) -1 if it should not be included. */
4551 1.1 christos
4552 1.1 christos static bfd_vma
4553 1.1 christos elf_m68k_plt_sym_val (bfd_vma i, const asection *plt,
4554 1.1 christos const arelent *rel ATTRIBUTE_UNUSED)
4555 1.1 christos {
4556 1.1 christos return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size;
4557 1.1.1.2 christos }
4558 1.1.1.2 christos
4559 1.1.1.2 christos /* Support for core dump NOTE sections. */
4560 1.1.1.2 christos
4561 1.1.1.2 christos static bfd_boolean
4562 1.1.1.2 christos elf_m68k_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
4563 1.1.1.2 christos {
4564 1.1.1.2 christos int offset;
4565 1.1.1.2 christos size_t size;
4566 1.1.1.2 christos
4567 1.1.1.2 christos switch (note->descsz)
4568 1.1.1.2 christos {
4569 1.1.1.2 christos default:
4570 1.1.1.2 christos return FALSE;
4571 1.1.1.2 christos
4572 1.1.1.2 christos case 154: /* Linux/m68k */
4573 1.1.1.2 christos /* pr_cursig */
4574 1.1.1.2 christos elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4575 1.1.1.2 christos
4576 1.1.1.2 christos /* pr_pid */
4577 1.1.1.2 christos elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
4578 1.1.1.2 christos
4579 1.1.1.2 christos /* pr_reg */
4580 1.1.1.2 christos offset = 70;
4581 1.1.1.2 christos size = 80;
4582 1.1.1.2 christos
4583 1.1.1.2 christos break;
4584 1.1.1.2 christos }
4585 1.1.1.2 christos
4586 1.1.1.2 christos /* Make a ".reg/999" section. */
4587 1.1.1.2 christos return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4588 1.1.1.2 christos size, note->descpos + offset);
4589 1.1.1.2 christos }
4590 1.1.1.2 christos
4591 1.1.1.2 christos static bfd_boolean
4592 1.1.1.2 christos elf_m68k_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4593 1.1.1.2 christos {
4594 1.1.1.2 christos switch (note->descsz)
4595 1.1.1.2 christos {
4596 1.1.1.2 christos default:
4597 1.1.1.2 christos return FALSE;
4598 1.1.1.2 christos
4599 1.1.1.2 christos case 124: /* Linux/m68k elf_prpsinfo. */
4600 1.1.1.2 christos elf_tdata (abfd)->core->pid
4601 1.1.1.2 christos = bfd_get_32 (abfd, note->descdata + 12);
4602 1.1.1.2 christos elf_tdata (abfd)->core->program
4603 1.1.1.2 christos = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4604 1.1.1.2 christos elf_tdata (abfd)->core->command
4605 1.1.1.2 christos = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4606 1.1.1.2 christos }
4607 1.1.1.2 christos
4608 1.1.1.2 christos /* Note that for some reason, a spurious space is tacked
4609 1.1.1.2 christos onto the end of the args in some (at least one anyway)
4610 1.1.1.2 christos implementations, so strip it off if it exists. */
4611 1.1.1.2 christos {
4612 1.1.1.2 christos char *command = elf_tdata (abfd)->core->command;
4613 1.1.1.2 christos int n = strlen (command);
4614 1.1.1.2 christos
4615 1.1.1.2 christos if (n > 0 && command[n - 1] == ' ')
4616 1.1.1.2 christos command[n - 1] = '\0';
4617 1.1.1.2 christos }
4618 1.1.1.2 christos
4619 1.1.1.2 christos return TRUE;
4620 1.1.1.4 christos }
4621 1.1 christos
4622 1.1 christos #define TARGET_BIG_SYM m68k_elf32_vec
4623 1.1 christos #define TARGET_BIG_NAME "elf32-m68k"
4624 1.1 christos #define ELF_MACHINE_CODE EM_68K
4625 1.1 christos #define ELF_MAXPAGESIZE 0x2000
4626 1.1 christos #define elf_backend_create_dynamic_sections \
4627 1.1 christos _bfd_elf_create_dynamic_sections
4628 1.1 christos #define bfd_elf32_bfd_link_hash_table_create \
4629 1.1 christos elf_m68k_link_hash_table_create
4630 1.1 christos #define bfd_elf32_bfd_final_link bfd_elf_final_link
4631 1.1 christos
4632 1.1 christos #define elf_backend_check_relocs elf_m68k_check_relocs
4633 1.1 christos #define elf_backend_always_size_sections \
4634 1.1 christos elf_m68k_always_size_sections
4635 1.1 christos #define elf_backend_adjust_dynamic_symbol \
4636 1.1 christos elf_m68k_adjust_dynamic_symbol
4637 1.1 christos #define elf_backend_size_dynamic_sections \
4638 1.1 christos elf_m68k_size_dynamic_sections
4639 1.1 christos #define elf_backend_final_write_processing elf_m68k_final_write_processing
4640 1.1 christos #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4641 1.1 christos #define elf_backend_relocate_section elf_m68k_relocate_section
4642 1.1 christos #define elf_backend_finish_dynamic_symbol \
4643 1.1 christos elf_m68k_finish_dynamic_symbol
4644 1.1 christos #define elf_backend_finish_dynamic_sections \
4645 1.1 christos elf_m68k_finish_dynamic_sections
4646 1.1 christos #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
4647 1.1.1.8 christos #define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol
4648 1.1 christos #define bfd_elf32_bfd_merge_private_bfd_data \
4649 1.1.1.8 christos elf32_m68k_merge_private_bfd_data
4650 1.1 christos #define bfd_elf32_bfd_set_private_flags \
4651 1.1.1.8 christos elf32_m68k_set_private_flags
4652 1.1 christos #define bfd_elf32_bfd_print_private_bfd_data \
4653 1.1 christos elf32_m68k_print_private_bfd_data
4654 1.1 christos #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class
4655 1.1.1.2 christos #define elf_backend_plt_sym_val elf_m68k_plt_sym_val
4656 1.1.1.2 christos #define elf_backend_object_p elf32_m68k_object_p
4657 1.1 christos #define elf_backend_grok_prstatus elf_m68k_grok_prstatus
4658 1.1 christos #define elf_backend_grok_psinfo elf_m68k_grok_psinfo
4659 1.1 christos
4660 1.1 christos #define elf_backend_can_gc_sections 1
4661 1.1 christos #define elf_backend_can_refcount 1
4662 1.1 christos #define elf_backend_want_got_plt 1
4663 1.1 christos #define elf_backend_plt_readonly 1
4664 1.1 christos #define elf_backend_want_plt_sym 0
4665 1.1.1.7 christos #define elf_backend_got_header_size 12
4666 1.1 christos #define elf_backend_rela_normal 1
4667 1.1.1.8 christos #define elf_backend_dtrel_excludes_plt 1
4668 1.1.1.8 christos
4669 1.1 christos #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4670
4671 #include "elf32-target.h"
4672