elf32-cris.c revision 1.1.1.4 1 1.1 skrll /* CRIS-specific support for 32-bit ELF.
2 1.1.1.4 christos Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 1.1 skrll Contributed by Axis Communications AB.
4 1.1 skrll Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 1.1 skrll PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
6 1.1 skrll
7 1.1 skrll This file is part of BFD, the Binary File Descriptor library.
8 1.1 skrll
9 1.1 skrll This program is free software; you can redistribute it and/or modify
10 1.1 skrll it under the terms of the GNU General Public License as published by
11 1.1 skrll the Free Software Foundation; either version 3 of the License, or
12 1.1 skrll (at your option) any later version.
13 1.1 skrll
14 1.1 skrll This program is distributed in the hope that it will be useful,
15 1.1 skrll but WITHOUT ANY WARRANTY; without even the implied warranty of
16 1.1 skrll MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 1.1 skrll GNU General Public License for more details.
18 1.1 skrll
19 1.1 skrll You should have received a copy of the GNU General Public License
20 1.1 skrll along with this program; if not, write to the Free Software
21 1.1 skrll Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 1.1 skrll MA 02110-1301, USA. */
23 1.1 skrll
24 1.1 skrll #include "sysdep.h"
25 1.1 skrll #include "bfd.h"
26 1.1 skrll #include "libbfd.h"
27 1.1 skrll #include "elf-bfd.h"
28 1.1 skrll #include "elf/cris.h"
29 1.1.1.2 christos #include <limits.h>
30 1.1 skrll
31 1.1.1.3 christos bfd_reloc_status_type
32 1.1.1.3 christos cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
33 1.1.1.3 christos asection *, bfd *, char **);
34 1.1.1.3 christos static bfd_boolean
35 1.1.1.3 christos cris_elf_set_mach_from_flags (bfd *, unsigned long);
36 1.1 skrll
37 1.1.1.3 christos /* Forward declarations. */
38 1.1 skrll static reloc_howto_type cris_elf_howto_table [] =
39 1.1 skrll {
40 1.1 skrll /* This reloc does nothing. */
41 1.1 skrll HOWTO (R_CRIS_NONE, /* type */
42 1.1 skrll 0, /* rightshift */
43 1.1.1.4 christos 3, /* size (0 = byte, 1 = short, 2 = long) */
44 1.1.1.4 christos 0, /* bitsize */
45 1.1 skrll FALSE, /* pc_relative */
46 1.1 skrll 0, /* bitpos */
47 1.1.1.4 christos complain_overflow_dont, /* complain_on_overflow */
48 1.1 skrll bfd_elf_generic_reloc, /* special_function */
49 1.1 skrll "R_CRIS_NONE", /* name */
50 1.1 skrll FALSE, /* partial_inplace */
51 1.1 skrll 0, /* src_mask */
52 1.1 skrll 0, /* dst_mask */
53 1.1 skrll FALSE), /* pcrel_offset */
54 1.1 skrll
55 1.1 skrll /* An 8 bit absolute relocation. */
56 1.1 skrll HOWTO (R_CRIS_8, /* type */
57 1.1 skrll 0, /* rightshift */
58 1.1 skrll 0, /* size (0 = byte, 1 = short, 2 = long) */
59 1.1 skrll 8, /* bitsize */
60 1.1 skrll FALSE, /* pc_relative */
61 1.1 skrll 0, /* bitpos */
62 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
63 1.1 skrll bfd_elf_generic_reloc, /* special_function */
64 1.1 skrll "R_CRIS_8", /* name */
65 1.1 skrll FALSE, /* partial_inplace */
66 1.1 skrll 0x0000, /* src_mask */
67 1.1 skrll 0x00ff, /* dst_mask */
68 1.1 skrll FALSE), /* pcrel_offset */
69 1.1 skrll
70 1.1 skrll /* A 16 bit absolute relocation. */
71 1.1 skrll HOWTO (R_CRIS_16, /* type */
72 1.1 skrll 0, /* rightshift */
73 1.1 skrll 1, /* size (0 = byte, 1 = short, 2 = long) */
74 1.1 skrll 16, /* bitsize */
75 1.1 skrll FALSE, /* pc_relative */
76 1.1 skrll 0, /* bitpos */
77 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
78 1.1 skrll bfd_elf_generic_reloc, /* special_function */
79 1.1 skrll "R_CRIS_16", /* name */
80 1.1 skrll FALSE, /* partial_inplace */
81 1.1 skrll 0x00000000, /* src_mask */
82 1.1 skrll 0x0000ffff, /* dst_mask */
83 1.1 skrll FALSE), /* pcrel_offset */
84 1.1 skrll
85 1.1 skrll /* A 32 bit absolute relocation. */
86 1.1 skrll HOWTO (R_CRIS_32, /* type */
87 1.1 skrll 0, /* rightshift */
88 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
89 1.1 skrll 32, /* bitsize */
90 1.1 skrll FALSE, /* pc_relative */
91 1.1 skrll 0, /* bitpos */
92 1.1 skrll /* We don't want overflow complaints for 64-bit vma builds
93 1.1 skrll for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 1.1 skrll 32-bit ELF) where sym=0xc0001234.
95 1.1 skrll Don't do this for the PIC relocs, as we don't expect to
96 1.1 skrll see them with large offsets. */
97 1.1 skrll complain_overflow_dont, /* complain_on_overflow */
98 1.1 skrll bfd_elf_generic_reloc, /* special_function */
99 1.1 skrll "R_CRIS_32", /* name */
100 1.1 skrll FALSE, /* partial_inplace */
101 1.1 skrll 0x00000000, /* src_mask */
102 1.1 skrll 0xffffffff, /* dst_mask */
103 1.1 skrll FALSE), /* pcrel_offset */
104 1.1 skrll
105 1.1 skrll /* An 8 bit PC-relative relocation. */
106 1.1 skrll HOWTO (R_CRIS_8_PCREL, /* type */
107 1.1 skrll 0, /* rightshift */
108 1.1 skrll 0, /* size (0 = byte, 1 = short, 2 = long) */
109 1.1 skrll 8, /* bitsize */
110 1.1 skrll TRUE, /* pc_relative */
111 1.1 skrll 0, /* bitpos */
112 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
113 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
114 1.1 skrll "R_CRIS_8_PCREL", /* name */
115 1.1 skrll FALSE, /* partial_inplace */
116 1.1 skrll 0x0000, /* src_mask */
117 1.1 skrll 0x00ff, /* dst_mask */
118 1.1 skrll TRUE), /* pcrel_offset */
119 1.1 skrll
120 1.1 skrll /* A 16 bit PC-relative relocation. */
121 1.1 skrll HOWTO (R_CRIS_16_PCREL, /* type */
122 1.1 skrll 0, /* rightshift */
123 1.1 skrll 1, /* size (0 = byte, 1 = short, 2 = long) */
124 1.1 skrll 16, /* bitsize */
125 1.1 skrll TRUE, /* pc_relative */
126 1.1 skrll 0, /* bitpos */
127 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
128 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
129 1.1 skrll "R_CRIS_16_PCREL", /* name */
130 1.1 skrll FALSE, /* partial_inplace */
131 1.1 skrll 0x00000000, /* src_mask */
132 1.1 skrll 0x0000ffff, /* dst_mask */
133 1.1 skrll TRUE), /* pcrel_offset */
134 1.1 skrll
135 1.1 skrll /* A 32 bit PC-relative relocation. */
136 1.1 skrll HOWTO (R_CRIS_32_PCREL, /* type */
137 1.1 skrll 0, /* rightshift */
138 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
139 1.1 skrll 32, /* bitsize */
140 1.1 skrll TRUE, /* pc_relative */
141 1.1 skrll 0, /* bitpos */
142 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
143 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
144 1.1 skrll "R_CRIS_32_PCREL", /* name */
145 1.1 skrll FALSE, /* partial_inplace */
146 1.1 skrll 0x00000000, /* src_mask */
147 1.1 skrll 0xffffffff, /* dst_mask */
148 1.1 skrll TRUE), /* pcrel_offset */
149 1.1 skrll
150 1.1 skrll /* GNU extension to record C++ vtable hierarchy. */
151 1.1 skrll HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
152 1.1 skrll 0, /* rightshift */
153 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
154 1.1 skrll 0, /* bitsize */
155 1.1 skrll FALSE, /* pc_relative */
156 1.1 skrll 0, /* bitpos */
157 1.1 skrll complain_overflow_dont, /* complain_on_overflow */
158 1.1 skrll NULL, /* special_function */
159 1.1 skrll "R_CRIS_GNU_VTINHERIT", /* name */
160 1.1 skrll FALSE, /* partial_inplace */
161 1.1 skrll 0, /* src_mask */
162 1.1 skrll 0, /* dst_mask */
163 1.1 skrll FALSE), /* pcrel_offset */
164 1.1 skrll
165 1.1 skrll /* GNU extension to record C++ vtable member usage. */
166 1.1 skrll HOWTO (R_CRIS_GNU_VTENTRY, /* type */
167 1.1 skrll 0, /* rightshift */
168 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
169 1.1 skrll 0, /* bitsize */
170 1.1 skrll FALSE, /* pc_relative */
171 1.1 skrll 0, /* bitpos */
172 1.1 skrll complain_overflow_dont, /* complain_on_overflow */
173 1.1 skrll _bfd_elf_rel_vtable_reloc_fn, /* special_function */
174 1.1 skrll "R_CRIS_GNU_VTENTRY", /* name */
175 1.1 skrll FALSE, /* partial_inplace */
176 1.1 skrll 0, /* src_mask */
177 1.1 skrll 0, /* dst_mask */
178 1.1 skrll FALSE), /* pcrel_offset */
179 1.1 skrll
180 1.1 skrll /* This is used only by the dynamic linker. The symbol should exist
181 1.1 skrll both in the object being run and in some shared library. The
182 1.1 skrll dynamic linker copies the data addressed by the symbol from the
183 1.1 skrll shared library into the object, because the object being
184 1.1 skrll run has to have the data at some particular address. */
185 1.1 skrll HOWTO (R_CRIS_COPY, /* type */
186 1.1 skrll 0, /* rightshift */
187 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
188 1.1 skrll 32, /* bitsize */
189 1.1 skrll FALSE, /* pc_relative */
190 1.1 skrll 0, /* bitpos */
191 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
192 1.1 skrll bfd_elf_generic_reloc, /* special_function */
193 1.1 skrll "R_CRIS_COPY", /* name */
194 1.1 skrll FALSE, /* partial_inplace */
195 1.1 skrll 0, /* src_mask */
196 1.1 skrll 0, /* dst_mask */
197 1.1 skrll FALSE), /* pcrel_offset */
198 1.1 skrll
199 1.1 skrll /* Like R_CRIS_32, but used when setting global offset table entries. */
200 1.1 skrll HOWTO (R_CRIS_GLOB_DAT, /* type */
201 1.1 skrll 0, /* rightshift */
202 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
203 1.1 skrll 32, /* bitsize */
204 1.1 skrll FALSE, /* pc_relative */
205 1.1 skrll 0, /* bitpos */
206 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
207 1.1 skrll bfd_elf_generic_reloc, /* special_function */
208 1.1 skrll "R_CRIS_GLOB_DAT", /* name */
209 1.1 skrll FALSE, /* partial_inplace */
210 1.1 skrll 0, /* src_mask */
211 1.1 skrll 0xffffffff, /* dst_mask */
212 1.1 skrll FALSE), /* pcrel_offset */
213 1.1 skrll
214 1.1 skrll /* Marks a procedure linkage table entry for a symbol. */
215 1.1 skrll HOWTO (R_CRIS_JUMP_SLOT, /* type */
216 1.1 skrll 0, /* rightshift */
217 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
218 1.1 skrll 32, /* bitsize */
219 1.1 skrll FALSE, /* pc_relative */
220 1.1 skrll 0, /* bitpos */
221 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
222 1.1 skrll bfd_elf_generic_reloc, /* special_function */
223 1.1 skrll "R_CRIS_JUMP_SLOT", /* name */
224 1.1 skrll FALSE, /* partial_inplace */
225 1.1 skrll 0, /* src_mask */
226 1.1 skrll 0, /* dst_mask */
227 1.1 skrll FALSE), /* pcrel_offset */
228 1.1 skrll
229 1.1 skrll /* Used only by the dynamic linker. When the object is run, this
230 1.1 skrll longword is set to the load address of the object, plus the
231 1.1 skrll addend. */
232 1.1 skrll HOWTO (R_CRIS_RELATIVE, /* type */
233 1.1 skrll 0, /* rightshift */
234 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
235 1.1 skrll 32, /* bitsize */
236 1.1 skrll FALSE, /* pc_relative */
237 1.1 skrll 0, /* bitpos */
238 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
239 1.1 skrll bfd_elf_generic_reloc, /* special_function */
240 1.1 skrll "R_CRIS_RELATIVE", /* name */
241 1.1 skrll FALSE, /* partial_inplace */
242 1.1 skrll 0, /* src_mask */
243 1.1 skrll 0xffffffff, /* dst_mask */
244 1.1 skrll FALSE), /* pcrel_offset */
245 1.1 skrll
246 1.1 skrll /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
247 1.1 skrll HOWTO (R_CRIS_16_GOT, /* type */
248 1.1 skrll 0, /* rightshift */
249 1.1 skrll 1, /* size (0 = byte, 1 = short, 2 = long) */
250 1.1 skrll 16, /* bitsize */
251 1.1 skrll FALSE, /* pc_relative */
252 1.1 skrll 0, /* bitpos */
253 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
254 1.1 skrll bfd_elf_generic_reloc, /* special_function */
255 1.1 skrll "R_CRIS_16_GOT", /* name */
256 1.1 skrll FALSE, /* partial_inplace */
257 1.1 skrll 0, /* src_mask */
258 1.1 skrll 0xffff, /* dst_mask */
259 1.1 skrll FALSE), /* pcrel_offset */
260 1.1 skrll
261 1.1 skrll HOWTO (R_CRIS_32_GOT, /* type */
262 1.1 skrll 0, /* rightshift */
263 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
264 1.1 skrll 32, /* bitsize */
265 1.1 skrll FALSE, /* pc_relative */
266 1.1 skrll 0, /* bitpos */
267 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
268 1.1 skrll bfd_elf_generic_reloc, /* special_function */
269 1.1 skrll "R_CRIS_32_GOT", /* name */
270 1.1 skrll FALSE, /* partial_inplace */
271 1.1 skrll 0, /* src_mask */
272 1.1 skrll 0xffffffff, /* dst_mask */
273 1.1 skrll FALSE), /* pcrel_offset */
274 1.1 skrll
275 1.1 skrll /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276 1.1 skrll the GOT table for the symbol. */
277 1.1 skrll HOWTO (R_CRIS_16_GOTPLT, /* type */
278 1.1 skrll 0, /* rightshift */
279 1.1 skrll 1, /* size (0 = byte, 1 = short, 2 = long) */
280 1.1 skrll 16, /* bitsize */
281 1.1 skrll FALSE, /* pc_relative */
282 1.1 skrll 0, /* bitpos */
283 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
284 1.1 skrll bfd_elf_generic_reloc, /* special_function */
285 1.1 skrll "R_CRIS_16_GOTPLT", /* name */
286 1.1 skrll FALSE, /* partial_inplace */
287 1.1 skrll 0, /* src_mask */
288 1.1 skrll 0xffff, /* dst_mask */
289 1.1 skrll FALSE), /* pcrel_offset */
290 1.1 skrll
291 1.1 skrll HOWTO (R_CRIS_32_GOTPLT, /* type */
292 1.1 skrll 0, /* rightshift */
293 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
294 1.1 skrll 32, /* bitsize */
295 1.1 skrll FALSE, /* pc_relative */
296 1.1 skrll 0, /* bitpos */
297 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
298 1.1 skrll bfd_elf_generic_reloc, /* special_function */
299 1.1 skrll "R_CRIS_32_GOTPLT", /* name */
300 1.1 skrll FALSE, /* partial_inplace */
301 1.1 skrll 0, /* src_mask */
302 1.1 skrll 0xffffffff, /* dst_mask */
303 1.1 skrll FALSE), /* pcrel_offset */
304 1.1 skrll
305 1.1 skrll /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
306 1.1 skrll be necessary. */
307 1.1 skrll HOWTO (R_CRIS_32_GOTREL, /* type */
308 1.1 skrll 0, /* rightshift */
309 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
310 1.1 skrll 32, /* bitsize */
311 1.1 skrll FALSE, /* pc_relative */
312 1.1 skrll 0, /* bitpos */
313 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
314 1.1 skrll bfd_elf_generic_reloc, /* special_function */
315 1.1 skrll "R_CRIS_32_GOTREL", /* name */
316 1.1 skrll FALSE, /* partial_inplace */
317 1.1 skrll 0, /* src_mask */
318 1.1 skrll 0xffffffff, /* dst_mask */
319 1.1 skrll FALSE), /* pcrel_offset */
320 1.1 skrll
321 1.1 skrll /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322 1.1 skrll to create PLT entry for symbol. */
323 1.1 skrll HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
324 1.1 skrll 0, /* rightshift */
325 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
326 1.1 skrll 32, /* bitsize */
327 1.1 skrll FALSE, /* pc_relative */
328 1.1 skrll 0, /* bitpos */
329 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
330 1.1 skrll bfd_elf_generic_reloc, /* special_function */
331 1.1 skrll "R_CRIS_32_PLT_GOTREL", /* name */
332 1.1 skrll FALSE, /* partial_inplace */
333 1.1 skrll 0, /* src_mask */
334 1.1 skrll 0xffffffff, /* dst_mask */
335 1.1 skrll FALSE), /* pcrel_offset */
336 1.1 skrll
337 1.1 skrll /* A 32-bit offset from PC (location after the relocation) + addend to
338 1.1 skrll entry for this symbol in PLT and request to create PLT entry for
339 1.1 skrll symbol. */
340 1.1 skrll HOWTO (R_CRIS_32_PLT_PCREL, /* type */
341 1.1 skrll 0, /* rightshift */
342 1.1 skrll 2, /* size (0 = byte, 1 = short, 2 = long) */
343 1.1 skrll 32, /* bitsize */
344 1.1 skrll TRUE, /* pc_relative */
345 1.1 skrll 0, /* bitpos */
346 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
347 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
348 1.1 skrll "R_CRIS_32_PLT_PCREL", /* name */
349 1.1 skrll FALSE, /* partial_inplace */
350 1.1 skrll 0, /* src_mask */
351 1.1 skrll 0xffffffff, /* dst_mask */
352 1.1.1.2 christos TRUE), /* pcrel_offset */
353 1.1.1.2 christos
354 1.1.1.2 christos /* We don't handle these in any special manner and cross-format
355 1.1.1.2 christos linking is not supported; just recognize them enough to pass them
356 1.1.1.2 christos around. FIXME: do the same for most PIC relocs and add sanity
357 1.1.1.2 christos tests to actually refuse gracefully to handle these and PIC
358 1.1.1.2 christos relocs for cross-format linking. */
359 1.1.1.2 christos #define TLSHOWTO32(name) \
360 1.1.1.2 christos HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
361 1.1.1.2 christos bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
362 1.1.1.2 christos #define TLSHOWTO16X(name, X) \
363 1.1.1.2 christos HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
364 1.1.1.2 christos bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
365 1.1.1.2 christos #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 1.1.1.2 christos #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
367 1.1.1.2 christos
368 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_GOT_GD),
369 1.1.1.2 christos TLSHOWTO16 (R_CRIS_16_GOT_GD),
370 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_GD),
371 1.1.1.2 christos TLSHOWTO32 (R_CRIS_DTP),
372 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_DTPREL),
373 1.1.1.2 christos TLSHOWTO16S (R_CRIS_16_DTPREL),
374 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
375 1.1.1.2 christos TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
376 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_TPREL),
377 1.1.1.2 christos TLSHOWTO16S (R_CRIS_16_TPREL),
378 1.1.1.2 christos TLSHOWTO32 (R_CRIS_DTPMOD),
379 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_IE)
380 1.1 skrll };
381 1.1 skrll
382 1.1 skrll /* Map BFD reloc types to CRIS ELF reloc types. */
384 1.1 skrll
385 1.1 skrll struct cris_reloc_map
386 1.1 skrll {
387 1.1 skrll bfd_reloc_code_real_type bfd_reloc_val;
388 1.1 skrll unsigned int cris_reloc_val;
389 1.1 skrll };
390 1.1 skrll
391 1.1 skrll static const struct cris_reloc_map cris_reloc_map [] =
392 1.1 skrll {
393 1.1 skrll { BFD_RELOC_NONE, R_CRIS_NONE },
394 1.1 skrll { BFD_RELOC_8, R_CRIS_8 },
395 1.1 skrll { BFD_RELOC_16, R_CRIS_16 },
396 1.1 skrll { BFD_RELOC_32, R_CRIS_32 },
397 1.1 skrll { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
398 1.1 skrll { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
399 1.1 skrll { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
400 1.1 skrll { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
401 1.1 skrll { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
402 1.1 skrll { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
403 1.1 skrll { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
404 1.1 skrll { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
405 1.1 skrll { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
406 1.1 skrll { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
407 1.1 skrll { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
408 1.1 skrll { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
409 1.1 skrll { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
410 1.1 skrll { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
411 1.1.1.2 christos { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
412 1.1.1.2 christos { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
413 1.1.1.2 christos { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
414 1.1.1.2 christos { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
415 1.1.1.2 christos { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
416 1.1.1.2 christos { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
417 1.1.1.2 christos { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
418 1.1.1.2 christos { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
419 1.1.1.2 christos { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
420 1.1.1.2 christos { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
421 1.1.1.2 christos { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
422 1.1.1.2 christos { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
423 1.1.1.2 christos { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
424 1.1 skrll { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
425 1.1 skrll };
426 1.1 skrll
427 1.1.1.3 christos static reloc_howto_type *
428 1.1.1.3 christos cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
429 1.1 skrll bfd_reloc_code_real_type code)
430 1.1 skrll {
431 1.1 skrll unsigned int i;
432 1.1 skrll
433 1.1 skrll for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
434 1.1 skrll if (cris_reloc_map [i].bfd_reloc_val == code)
435 1.1 skrll return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
436 1.1 skrll
437 1.1 skrll return NULL;
438 1.1 skrll }
439 1.1 skrll
440 1.1 skrll static reloc_howto_type *
441 1.1 skrll cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
442 1.1 skrll {
443 1.1 skrll unsigned int i;
444 1.1 skrll
445 1.1 skrll for (i = 0;
446 1.1 skrll i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
447 1.1 skrll i++)
448 1.1 skrll if (cris_elf_howto_table[i].name != NULL
449 1.1 skrll && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
450 1.1 skrll return &cris_elf_howto_table[i];
451 1.1 skrll
452 1.1 skrll return NULL;
453 1.1 skrll }
454 1.1 skrll
455 1.1 skrll /* Set the howto pointer for an CRIS ELF reloc. */
456 1.1 skrll
457 1.1.1.3 christos static void
458 1.1.1.3 christos cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
459 1.1.1.3 christos arelent * cache_ptr,
460 1.1 skrll Elf_Internal_Rela * dst)
461 1.1.1.2 christos {
462 1.1 skrll enum elf_cris_reloc_type r_type;
463 1.1 skrll
464 1.1.1.4 christos r_type = ELF32_R_TYPE (dst->r_info);
465 1.1.1.4 christos if (r_type >= R_CRIS_max)
466 1.1.1.4 christos {
467 1.1.1.4 christos _bfd_error_handler (_("%B: invalid CRIS reloc number: %d"), abfd, r_type);
468 1.1.1.4 christos r_type = 0;
469 1.1 skrll }
470 1.1 skrll cache_ptr->howto = & cris_elf_howto_table [r_type];
471 1.1 skrll }
472 1.1 skrll
473 1.1.1.3 christos bfd_reloc_status_type
474 1.1.1.3 christos cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
475 1.1.1.3 christos arelent *reloc_entry,
476 1.1.1.3 christos asymbol *symbol,
477 1.1.1.3 christos void * data ATTRIBUTE_UNUSED,
478 1.1.1.3 christos asection *input_section,
479 1.1.1.3 christos bfd *output_bfd,
480 1.1 skrll char **error_message ATTRIBUTE_UNUSED)
481 1.1 skrll {
482 1.1 skrll /* By default (using only bfd_elf_generic_reloc when linking to
483 1.1 skrll non-ELF formats) PC-relative relocs are relative to the beginning
484 1.1 skrll of the reloc. CRIS PC-relative relocs are relative to the position
485 1.1 skrll *after* the reloc because that's what pre-CRISv32 PC points to
486 1.1 skrll after reading an insn field with that reloc. (For CRISv32, PC is
487 1.1 skrll actually relative to the start of the insn, but we keep the old
488 1.1 skrll definition.) Still, we use as much generic machinery as we can.
489 1.1 skrll
490 1.1 skrll Only adjust when doing a final link. */
491 1.1 skrll if (output_bfd == (bfd *) NULL)
492 1.1 skrll reloc_entry->addend -= 1 << reloc_entry->howto->size;
493 1.1 skrll
494 1.1 skrll return
495 1.1 skrll bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
496 1.1 skrll input_section, output_bfd, error_message);
497 1.1 skrll }
498 1.1 skrll
499 1.1 skrll /* Support for core dump NOTE sections.
501 1.1 skrll The slightly unintuitive code layout is an attempt to keep at least
502 1.1 skrll some similarities with other ports, hoping to simplify general
503 1.1 skrll changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
504 1.1.1.3 christos
505 1.1 skrll static bfd_boolean
506 1.1 skrll cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
507 1.1 skrll {
508 1.1 skrll int offset;
509 1.1 skrll size_t size;
510 1.1 skrll
511 1.1 skrll if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
512 1.1 skrll switch (note->descsz)
513 1.1 skrll {
514 1.1 skrll default:
515 1.1 skrll return FALSE;
516 1.1 skrll
517 1.1.1.4 christos case 202: /* Linux/CRISv32 */
518 1.1 skrll /* pr_cursig */
519 1.1 skrll elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
520 1.1.1.4 christos
521 1.1 skrll /* pr_pid */
522 1.1 skrll elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
523 1.1 skrll
524 1.1 skrll /* pr_reg */
525 1.1 skrll offset = 70;
526 1.1 skrll size = 128;
527 1.1 skrll
528 1.1 skrll break;
529 1.1 skrll }
530 1.1 skrll else
531 1.1 skrll switch (note->descsz)
532 1.1 skrll {
533 1.1 skrll default:
534 1.1 skrll return FALSE;
535 1.1 skrll
536 1.1.1.4 christos case 214: /* Linux/CRIS */
537 1.1 skrll /* pr_cursig */
538 1.1 skrll elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
539 1.1.1.4 christos
540 1.1 skrll /* pr_pid */
541 1.1 skrll elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
542 1.1 skrll
543 1.1 skrll /* pr_reg */
544 1.1 skrll offset = 70;
545 1.1 skrll size = 140;
546 1.1 skrll
547 1.1 skrll break;
548 1.1 skrll }
549 1.1 skrll
550 1.1 skrll /* Make a ".reg/999" section. */
551 1.1 skrll return _bfd_elfcore_make_pseudosection (abfd, ".reg",
552 1.1 skrll size, note->descpos + offset);
553 1.1 skrll }
554 1.1.1.3 christos
555 1.1 skrll static bfd_boolean
556 1.1 skrll cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
557 1.1 skrll {
558 1.1 skrll if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
559 1.1 skrll switch (note->descsz)
560 1.1 skrll {
561 1.1 skrll default:
562 1.1 skrll return FALSE;
563 1.1.1.4 christos
564 1.1 skrll case 124: /* Linux/CRISv32 elf_prpsinfo */
565 1.1.1.4 christos elf_tdata (abfd)->core->program
566 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
567 1.1 skrll elf_tdata (abfd)->core->command
568 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
569 1.1 skrll }
570 1.1 skrll else
571 1.1 skrll switch (note->descsz)
572 1.1 skrll {
573 1.1 skrll default:
574 1.1 skrll return FALSE;
575 1.1.1.4 christos
576 1.1 skrll case 124: /* Linux/CRIS elf_prpsinfo */
577 1.1.1.4 christos elf_tdata (abfd)->core->program
578 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
579 1.1 skrll elf_tdata (abfd)->core->command
580 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
581 1.1 skrll }
582 1.1 skrll
583 1.1 skrll /* Note that for some reason, a spurious space is tacked
584 1.1 skrll onto the end of the args in some (at least one anyway)
585 1.1 skrll implementations, so strip it off if it exists. */
586 1.1.1.4 christos
587 1.1 skrll {
588 1.1 skrll char *command = elf_tdata (abfd)->core->command;
589 1.1 skrll int n = strlen (command);
590 1.1 skrll
591 1.1 skrll if (0 < n && command[n - 1] == ' ')
592 1.1 skrll command[n - 1] = '\0';
593 1.1 skrll }
594 1.1 skrll
595 1.1 skrll return TRUE;
596 1.1 skrll }
597 1.1 skrll
598 1.1 skrll /* The name of the dynamic interpreter. This is put in the .interp
600 1.1 skrll section. */
601 1.1 skrll
602 1.1 skrll #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
603 1.1 skrll
604 1.1 skrll /* The size in bytes of an entry in the procedure linkage table. */
605 1.1 skrll
606 1.1 skrll #define PLT_ENTRY_SIZE 20
607 1.1 skrll #define PLT_ENTRY_SIZE_V32 26
608 1.1 skrll
609 1.1 skrll /* The first entry in an absolute procedure linkage table looks like this. */
610 1.1 skrll
611 1.1 skrll static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
612 1.1 skrll {
613 1.1 skrll 0xfc, 0xe1,
614 1.1 skrll 0x7e, 0x7e, /* push mof. */
615 1.1 skrll 0x7f, 0x0d, /* (dip [pc+]) */
616 1.1 skrll 0, 0, 0, 0, /* Replaced with address of .got + 4. */
617 1.1 skrll 0x30, 0x7a, /* move [...],mof */
618 1.1 skrll 0x7f, 0x0d, /* (dip [pc+]) */
619 1.1 skrll 0, 0, 0, 0, /* Replaced with address of .got + 8. */
620 1.1 skrll 0x30, 0x09 /* jump [...] */
621 1.1 skrll };
622 1.1 skrll
623 1.1 skrll static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
624 1.1 skrll {
625 1.1 skrll 0x84, 0xe2, /* subq 4,$sp */
626 1.1 skrll 0x6f, 0xfe, /* move.d 0,$acr */
627 1.1 skrll 0, 0, 0, 0, /* Replaced by address of .got + 4. */
628 1.1 skrll 0x7e, 0x7a, /* move $mof,[$sp] */
629 1.1 skrll 0x3f, 0x7a, /* move [$acr],$mof */
630 1.1 skrll 0x04, 0xf2, /* addq 4,acr */
631 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
632 1.1 skrll 0xbf, 0x09, /* jump $acr */
633 1.1 skrll 0xb0, 0x05, /* nop */
634 1.1 skrll 0, 0 /* Pad out to 26 bytes. */
635 1.1 skrll };
636 1.1 skrll
637 1.1 skrll /* Subsequent entries in an absolute procedure linkage table look like
638 1.1 skrll this. */
639 1.1 skrll
640 1.1 skrll static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
641 1.1 skrll {
642 1.1 skrll 0x7f, 0x0d, /* (dip [pc+]) */
643 1.1 skrll 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
644 1.1 skrll 0x30, 0x09, /* jump [...] */
645 1.1 skrll 0x3f, 0x7e, /* move [pc+],mof */
646 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
647 1.1 skrll 0x2f, 0xfe, /* add.d [pc+],pc */
648 1.1 skrll 0xec, 0xff,
649 1.1 skrll 0xff, 0xff /* Replaced with offset to start of .plt. */
650 1.1 skrll };
651 1.1 skrll
652 1.1 skrll static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
653 1.1 skrll {
654 1.1 skrll 0x6f, 0xfe, /* move.d 0,$acr */
655 1.1 skrll 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
656 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
657 1.1 skrll 0xbf, 0x09, /* jump $acr */
658 1.1 skrll 0xb0, 0x05, /* nop */
659 1.1 skrll 0x3f, 0x7e, /* move 0,mof */
660 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
661 1.1 skrll 0xbf, 0x0e, /* ba start_of_plt0_entry */
662 1.1 skrll 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
663 1.1 skrll 0xb0, 0x05 /* nop */
664 1.1 skrll };
665 1.1 skrll
666 1.1 skrll /* The first entry in a PIC procedure linkage table looks like this. */
667 1.1 skrll
668 1.1 skrll static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
669 1.1 skrll {
670 1.1 skrll 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
671 1.1 skrll 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
672 1.1 skrll 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
673 1.1 skrll 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
674 1.1 skrll };
675 1.1 skrll
676 1.1 skrll static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
677 1.1 skrll {
678 1.1 skrll 0x84, 0xe2, /* subq 4,$sp */
679 1.1 skrll 0x04, 0x01, /* addoq 4,$r0,$acr */
680 1.1 skrll 0x7e, 0x7a, /* move $mof,[$sp] */
681 1.1 skrll 0x3f, 0x7a, /* move [$acr],$mof */
682 1.1 skrll 0x04, 0xf2, /* addq 4,$acr */
683 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
684 1.1 skrll 0xbf, 0x09, /* jump $acr */
685 1.1 skrll 0xb0, 0x05, /* nop */
686 1.1 skrll 0, 0, /* Pad out to 26 bytes. */
687 1.1 skrll 0, 0, 0, 0,
688 1.1 skrll 0, 0, 0, 0
689 1.1 skrll };
690 1.1 skrll
691 1.1 skrll /* Subsequent entries in a PIC procedure linkage table look like this. */
692 1.1 skrll
693 1.1 skrll static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
694 1.1 skrll {
695 1.1 skrll 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
696 1.1 skrll 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
697 1.1 skrll 0x30, 0x09, /* jump [...] */
698 1.1 skrll 0x3f, 0x7e, /* move [pc+],mof */
699 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
700 1.1 skrll 0x2f, 0xfe, /* add.d [pc+],pc */
701 1.1 skrll 0xec, 0xff, /* Replaced with offset to start of .plt. */
702 1.1 skrll 0xff, 0xff
703 1.1 skrll };
704 1.1 skrll
705 1.1 skrll static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
706 1.1 skrll {
707 1.1 skrll 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
708 1.1 skrll 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
709 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
710 1.1 skrll 0xbf, 0x09, /* jump $acr */
711 1.1 skrll 0xb0, 0x05, /* nop */
712 1.1 skrll 0x3f, 0x7e, /* move relocoffs,$mof */
713 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
714 1.1 skrll 0xbf, 0x0e, /* ba start_of_plt */
715 1.1 skrll 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
716 1.1 skrll 0xb0, 0x05 /* nop */
717 1.1 skrll };
718 1.1 skrll
719 1.1 skrll /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
721 1.1 skrll (and most other PIC/shlib stuff). Check that we don't drift away
722 1.1 skrll without reason.
723 1.1 skrll
724 1.1 skrll The CRIS linker, like the m68k and i386 linkers (and probably the rest
725 1.1 skrll too) needs to keep track of the number of relocs that it decides to
726 1.1 skrll copy in check_relocs for each symbol. This is so that it can discard
727 1.1 skrll PC relative relocs if it doesn't need them when linking with
728 1.1 skrll -Bsymbolic. We store the information in a field extending the regular
729 1.1 skrll ELF linker hash table. */
730 1.1 skrll
731 1.1 skrll /* This structure keeps track of the number of PC relative relocs we have
732 1.1 skrll copied for a given symbol. */
733 1.1 skrll
734 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied
735 1.1 skrll {
736 1.1 skrll /* Next section. */
737 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *next;
738 1.1 skrll
739 1.1 skrll /* A section in dynobj. */
740 1.1.1.2 christos asection *section;
741 1.1.1.2 christos
742 1.1.1.2 christos /* Number of relocs copied in this section. */
743 1.1 skrll bfd_size_type count;
744 1.1 skrll
745 1.1 skrll /* Example of reloc being copied, for message. */
746 1.1 skrll enum elf_cris_reloc_type r_type;
747 1.1 skrll };
748 1.1 skrll
749 1.1 skrll /* CRIS ELF linker hash entry. */
750 1.1 skrll
751 1.1 skrll struct elf_cris_link_hash_entry
752 1.1 skrll {
753 1.1 skrll struct elf_link_hash_entry root;
754 1.1 skrll
755 1.1 skrll /* Number of PC relative relocs copied for this symbol. */
756 1.1 skrll struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
757 1.1 skrll
758 1.1 skrll /* The GOTPLT references are CRIS-specific; the goal is to avoid having
759 1.1 skrll both a general GOT and a PLT-specific GOT entry for the same symbol,
760 1.1 skrll when it is referenced both as a function and as a function pointer.
761 1.1 skrll
762 1.1 skrll Number of GOTPLT references for a function. */
763 1.1 skrll bfd_signed_vma gotplt_refcount;
764 1.1 skrll
765 1.1 skrll /* Actual GOTPLT index for this symbol, if applicable, or zero if not
766 1.1.1.2 christos (zero is never used as an index). FIXME: We should be able to fold
767 1.1.1.2 christos this with gotplt_refcount in a union, like the got and plt unions in
768 1.1.1.2 christos elf_link_hash_entry. */
769 1.1.1.2 christos bfd_size_type gotplt_offset;
770 1.1.1.2 christos
771 1.1.1.2 christos /* The root.got.refcount is the sum of the regular reference counts
772 1.1.1.2 christos (this) and those members below. We have to keep a separate count
773 1.1.1.2 christos to track when we've found the first (or last) reference to a
774 1.1.1.2 christos regular got entry. The offset is in root.got.offset. */
775 1.1.1.2 christos bfd_signed_vma reg_got_refcount;
776 1.1.1.2 christos
777 1.1.1.2 christos /* Similar to the above, the number of reloc references to this
778 1.1.1.2 christos symbols that need a R_CRIS_32_TPREL slot. The offset is in
779 1.1.1.2 christos root.got.offset, because this and .dtp_refcount can't validly
780 1.1.1.2 christos happen when there's also a regular GOT entry; that's invalid
781 1.1.1.2 christos input for which an error is emitted. */
782 1.1.1.2 christos bfd_signed_vma tprel_refcount;
783 1.1.1.2 christos
784 1.1 skrll /* Similar to the above, the number of reloc references to this
785 1.1 skrll symbols that need a R_CRIS_DTP slot. The offset is in
786 1.1.1.3 christos root.got.offset; plus 4 if .tprel_refcount > 0. */
787 1.1.1.3 christos bfd_signed_vma dtp_refcount;
788 1.1.1.3 christos };
789 1.1.1.3 christos
790 1.1.1.3 christos static bfd_boolean
791 1.1.1.3 christos elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
792 1.1.1.3 christos void * );
793 1.1.1.2 christos static bfd_boolean
794 1.1.1.2 christos elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
795 1.1.1.2 christos void *);
796 1.1.1.2 christos
797 1.1.1.2 christos /* The local_got_refcounts and local_got_offsets are a multiple of
798 1.1.1.2 christos LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
799 1.1.1.2 christos refcount for GOT itself, see code), with the summary / group offset
800 1.1.1.2 christos for local symbols located at offset N, reference counts for
801 1.1.1.2 christos ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
802 1.1.1.2 christos relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
803 1.1.1.2 christos 3*LSNUM. */
804 1.1.1.2 christos
805 1.1.1.2 christos #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
806 1.1 skrll #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
807 1.1 skrll #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
808 1.1 skrll #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
809 1.1 skrll
810 1.1 skrll /* CRIS ELF linker hash table. */
811 1.1 skrll
812 1.1 skrll struct elf_cris_link_hash_table
813 1.1 skrll {
814 1.1 skrll struct elf_link_hash_table root;
815 1.1 skrll
816 1.1.1.2 christos /* We can't use the PLT offset and calculate to get the GOTPLT offset,
817 1.1.1.2 christos since we try and avoid creating GOTPLT:s when there's already a GOT.
818 1.1.1.2 christos Instead, we keep and update the next available index here. */
819 1.1.1.2 christos bfd_size_type next_gotplt_entry;
820 1.1.1.2 christos
821 1.1.1.2 christos /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
822 1.1.1.2 christos been seen for any input; if != 0, then the constant-offset
823 1.1 skrll R_CRIS_DTPMOD is needed for this DSO/executable. This turns
824 1.1 skrll negative at relocation, so that we don't need an extra flag for
825 1.1 skrll when the reloc is output. */
826 1.1 skrll bfd_signed_vma dtpmod_refcount;
827 1.1 skrll };
828 1.1 skrll
829 1.1 skrll /* Traverse a CRIS ELF linker hash table. */
830 1.1.1.2 christos
831 1.1 skrll #define elf_cris_link_hash_traverse(table, func, info) \
832 1.1 skrll (elf_link_hash_traverse \
833 1.1 skrll (&(table)->root, \
834 1.1 skrll (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
835 1.1 skrll (info)))
836 1.1.1.2 christos
837 1.1.1.2 christos /* Get the CRIS ELF linker hash table from a link_info structure. */
838 1.1.1.2 christos
839 1.1.1.2 christos #define elf_cris_hash_table(p) \
840 1.1.1.2 christos (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
841 1.1.1.2 christos == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
842 1.1.1.2 christos
843 1.1.1.2 christos /* Get the CRIS ELF linker hash entry from a regular hash entry (the
844 1.1.1.2 christos "parent class"). The .root reference is just a simple type
845 1.1 skrll check on the argument. */
846 1.1 skrll
847 1.1 skrll #define elf_cris_hash_entry(p) \
848 1.1 skrll ((struct elf_cris_link_hash_entry *) (&(p)->root))
849 1.1.1.2 christos
850 1.1.1.2 christos /* Create an entry in a CRIS ELF linker hash table. */
851 1.1.1.2 christos
852 1.1 skrll static struct bfd_hash_entry *
853 1.1 skrll elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
854 1.1 skrll struct bfd_hash_table *table,
855 1.1 skrll const char *string)
856 1.1 skrll {
857 1.1 skrll struct elf_cris_link_hash_entry *ret =
858 1.1 skrll (struct elf_cris_link_hash_entry *) entry;
859 1.1 skrll
860 1.1 skrll /* Allocate the structure if it has not already been allocated by a
861 1.1 skrll subclass. */
862 1.1 skrll if (ret == (struct elf_cris_link_hash_entry *) NULL)
863 1.1 skrll ret = ((struct elf_cris_link_hash_entry *)
864 1.1 skrll bfd_hash_allocate (table,
865 1.1 skrll sizeof (struct elf_cris_link_hash_entry)));
866 1.1 skrll if (ret == (struct elf_cris_link_hash_entry *) NULL)
867 1.1 skrll return (struct bfd_hash_entry *) ret;
868 1.1 skrll
869 1.1 skrll /* Call the allocation method of the superclass. */
870 1.1 skrll ret = ((struct elf_cris_link_hash_entry *)
871 1.1 skrll _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
872 1.1 skrll table, string));
873 1.1 skrll if (ret != (struct elf_cris_link_hash_entry *) NULL)
874 1.1.1.2 christos {
875 1.1.1.2 christos ret->pcrel_relocs_copied = NULL;
876 1.1.1.2 christos ret->gotplt_refcount = 0;
877 1.1 skrll ret->gotplt_offset = 0;
878 1.1 skrll ret->dtp_refcount = 0;
879 1.1 skrll ret->tprel_refcount = 0;
880 1.1 skrll ret->reg_got_refcount = 0;
881 1.1 skrll }
882 1.1 skrll
883 1.1 skrll return (struct bfd_hash_entry *) ret;
884 1.1 skrll }
885 1.1.1.2 christos
886 1.1 skrll /* Create a CRIS ELF linker hash table. */
887 1.1 skrll
888 1.1 skrll static struct bfd_link_hash_table *
889 1.1 skrll elf_cris_link_hash_table_create (bfd *abfd)
890 1.1.1.4 christos {
891 1.1 skrll struct elf_cris_link_hash_table *ret;
892 1.1 skrll bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
893 1.1 skrll
894 1.1 skrll ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
895 1.1 skrll if (ret == (struct elf_cris_link_hash_table *) NULL)
896 1.1.1.2 christos return NULL;
897 1.1.1.2 christos
898 1.1 skrll if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
899 1.1 skrll elf_cris_link_hash_newfunc,
900 1.1 skrll sizeof (struct elf_cris_link_hash_entry),
901 1.1 skrll CRIS_ELF_DATA))
902 1.1 skrll {
903 1.1 skrll free (ret);
904 1.1 skrll return NULL;
905 1.1 skrll }
906 1.1 skrll
907 1.1 skrll /* Initialize to skip over the first three entries in the gotplt; they
908 1.1 skrll are used for run-time symbol evaluation. */
909 1.1 skrll ret->next_gotplt_entry = 12;
910 1.1 skrll
911 1.1 skrll return &ret->root.root;
912 1.1 skrll }
913 1.1 skrll
914 1.1.1.3 christos /* Perform a single relocation. By default we use the standard BFD
916 1.1.1.3 christos routines, with a few tweaks. */
917 1.1.1.3 christos
918 1.1.1.3 christos static bfd_reloc_status_type
919 1.1.1.3 christos cris_final_link_relocate (reloc_howto_type * howto,
920 1.1 skrll bfd * input_bfd,
921 1.1 skrll asection * input_section,
922 1.1.1.2 christos bfd_byte * contents,
923 1.1 skrll Elf_Internal_Rela * rel,
924 1.1 skrll bfd_vma relocation)
925 1.1 skrll {
926 1.1 skrll bfd_reloc_status_type r;
927 1.1.1.2 christos enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
928 1.1 skrll
929 1.1 skrll /* PC-relative relocations are relative to the position *after*
930 1.1 skrll the reloc. Note that for R_CRIS_8_PCREL the adjustment is
931 1.1 skrll not a single byte, since PC must be 16-bit-aligned. */
932 1.1 skrll switch (r_type)
933 1.1 skrll {
934 1.1 skrll /* Check that the 16-bit GOT relocs are positive. */
935 1.1 skrll case R_CRIS_16_GOTPLT:
936 1.1 skrll case R_CRIS_16_GOT:
937 1.1 skrll if ((bfd_signed_vma) relocation < 0)
938 1.1 skrll return bfd_reloc_overflow;
939 1.1 skrll break;
940 1.1 skrll
941 1.1 skrll case R_CRIS_32_PLT_PCREL:
942 1.1 skrll case R_CRIS_32_PCREL:
943 1.1 skrll relocation -= 2;
944 1.1 skrll /* Fall through. */
945 1.1 skrll case R_CRIS_8_PCREL:
946 1.1 skrll case R_CRIS_16_PCREL:
947 1.1 skrll relocation -= 2;
948 1.1 skrll break;
949 1.1 skrll
950 1.1 skrll default:
951 1.1 skrll break;
952 1.1 skrll }
953 1.1 skrll
954 1.1 skrll r = _bfd_final_link_relocate (howto, input_bfd, input_section,
955 1.1.1.2 christos contents, rel->r_offset,
956 1.1.1.2 christos relocation, rel->r_addend);
957 1.1.1.2 christos return r;
958 1.1.1.2 christos }
959 1.1.1.2 christos
960 1.1.1.2 christos
962 1.1.1.2 christos /* The number of errors left before we stop outputting reloc-specific
963 1.1 skrll explanatory messages. By coincidence, this works nicely together
964 1.1 skrll with the default number of messages you'll get from LD about
965 1.1 skrll "relocation truncated to fit" messages before you get an
966 1.1 skrll "additional relocation overflows omitted from the output". */
967 1.1.1.2 christos static int additional_relocation_error_msg_count = 10;
968 1.1.1.2 christos
969 1.1.1.2 christos /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
970 1.1.1.2 christos copied, for further comments. */
971 1.1.1.2 christos
972 1.1.1.2 christos static bfd_boolean
973 1.1.1.2 christos cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
974 1.1.1.2 christos struct bfd_link_info *info,
975 1.1 skrll bfd *input_bfd,
976 1.1.1.2 christos asection *input_section,
977 1.1 skrll bfd_byte *contents,
978 1.1 skrll Elf_Internal_Rela *relocs,
979 1.1 skrll Elf_Internal_Sym *local_syms,
980 1.1 skrll asection **local_sections)
981 1.1 skrll {
982 1.1 skrll struct elf_cris_link_hash_table * htab;
983 1.1 skrll bfd *dynobj;
984 1.1 skrll Elf_Internal_Shdr *symtab_hdr;
985 1.1 skrll struct elf_link_hash_entry **sym_hashes;
986 1.1.1.2 christos bfd_vma *local_got_offsets;
987 1.1.1.2 christos asection *sgot;
988 1.1.1.2 christos asection *splt;
989 1.1.1.2 christos asection *sreloc;
990 1.1.1.2 christos Elf_Internal_Rela *rel;
991 1.1 skrll Elf_Internal_Rela *relend;
992 1.1 skrll asection *srelgot;
993 1.1 skrll
994 1.1 skrll htab = elf_cris_hash_table (info);
995 1.1 skrll if (htab == NULL)
996 1.1 skrll return FALSE;
997 1.1 skrll
998 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
999 1.1 skrll local_got_offsets = elf_local_got_offsets (input_bfd);
1000 1.1 skrll symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1001 1.1.1.2 christos sym_hashes = elf_sym_hashes (input_bfd);
1002 1.1 skrll relend = relocs + input_section->reloc_count;
1003 1.1 skrll
1004 1.1 skrll sgot = NULL;
1005 1.1.1.3 christos splt = NULL;
1006 1.1.1.3 christos sreloc = NULL;
1007 1.1 skrll srelgot = NULL;
1008 1.1 skrll
1009 1.1 skrll if (dynobj != NULL)
1010 1.1 skrll {
1011 1.1 skrll splt = bfd_get_linker_section (dynobj, ".plt");
1012 1.1 skrll sgot = bfd_get_linker_section (dynobj, ".got");
1013 1.1 skrll }
1014 1.1 skrll
1015 1.1 skrll for (rel = relocs; rel < relend; rel ++)
1016 1.1 skrll {
1017 1.1 skrll reloc_howto_type *howto;
1018 1.1 skrll unsigned long r_symndx;
1019 1.1.1.2 christos Elf_Internal_Sym *sym;
1020 1.1 skrll asection *sec;
1021 1.1 skrll struct elf_link_hash_entry *h;
1022 1.1 skrll bfd_vma relocation;
1023 1.1 skrll bfd_reloc_status_type r;
1024 1.1 skrll const char *symname = NULL;
1025 1.1 skrll enum elf_cris_reloc_type r_type;
1026 1.1 skrll
1027 1.1 skrll r_type = ELF32_R_TYPE (rel->r_info);
1028 1.1 skrll
1029 1.1 skrll if ( r_type == R_CRIS_GNU_VTINHERIT
1030 1.1 skrll || r_type == R_CRIS_GNU_VTENTRY)
1031 1.1 skrll continue;
1032 1.1 skrll
1033 1.1 skrll r_symndx = ELF32_R_SYM (rel->r_info);
1034 1.1 skrll howto = cris_elf_howto_table + r_type;
1035 1.1 skrll h = NULL;
1036 1.1 skrll sym = NULL;
1037 1.1 skrll sec = NULL;
1038 1.1 skrll
1039 1.1 skrll if (r_symndx < symtab_hdr->sh_info)
1040 1.1 skrll {
1041 1.1 skrll sym = local_syms + r_symndx;
1042 1.1 skrll sec = local_sections [r_symndx];
1043 1.1 skrll relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1044 1.1 skrll
1045 1.1 skrll symname = (bfd_elf_string_from_elf_section
1046 1.1.1.4 christos (input_bfd, symtab_hdr->sh_link, sym->st_name));
1047 1.1 skrll if (symname == NULL)
1048 1.1 skrll symname = bfd_section_name (input_bfd, sec);
1049 1.1 skrll }
1050 1.1 skrll else
1051 1.1 skrll {
1052 1.1.1.4 christos bfd_boolean warned, ignored;
1053 1.1 skrll bfd_boolean unresolved_reloc;
1054 1.1.1.2 christos
1055 1.1.1.2 christos RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1056 1.1 skrll r_symndx, symtab_hdr, sym_hashes,
1057 1.1 skrll h, sec, relocation,
1058 1.1 skrll unresolved_reloc, warned, ignored);
1059 1.1 skrll
1060 1.1 skrll symname = h->root.root.string;
1061 1.1 skrll
1062 1.1 skrll if (unresolved_reloc
1063 1.1 skrll /* Perhaps we should detect the cases that
1064 1.1 skrll sec->output_section is expected to be NULL like i386 and
1065 1.1 skrll m68k, but apparently (and according to elfxx-ia64.c) all
1066 1.1 skrll valid cases are where the symbol is defined in a shared
1067 1.1 skrll object which we link dynamically against. This includes
1068 1.1 skrll PLT relocs for which we've created a PLT entry and other
1069 1.1 skrll relocs for which we're prepared to create dynamic
1070 1.1 skrll relocations.
1071 1.1 skrll
1072 1.1 skrll For now, new situations cause us to just err when
1073 1.1 skrll sec->output_offset is NULL but the object with the symbol
1074 1.1 skrll is *not* dynamically linked against. Thus this will
1075 1.1 skrll automatically remind us so we can see if there are other
1076 1.1 skrll valid cases we need to revisit. */
1077 1.1 skrll && (sec->owner->flags & DYNAMIC) != 0)
1078 1.1 skrll relocation = 0;
1079 1.1 skrll
1080 1.1 skrll else if (h->root.type == bfd_link_hash_defined
1081 1.1 skrll || h->root.type == bfd_link_hash_defweak)
1082 1.1 skrll {
1083 1.1 skrll /* Here follow the cases where the relocation value must
1084 1.1 skrll be zero (or when further handling is simplified when
1085 1.1 skrll zero). I can't claim to understand the various
1086 1.1 skrll conditions and they weren't described in the files
1087 1.1 skrll where I copied them from (elf32-m68k.c and
1088 1.1 skrll elf32-i386.c), but let's mention examples of where
1089 1.1 skrll they happen. FIXME: Perhaps define and use a
1090 1.1 skrll dynamic_symbol_p function like ia64.
1091 1.1 skrll
1092 1.1 skrll - When creating a shared library, we can have an
1093 1.1 skrll ordinary relocation for a symbol defined in a shared
1094 1.1 skrll library (perhaps the one we create). We then make
1095 1.1.1.4 christos the relocation value zero, as the value seen now will
1096 1.1.1.4 christos be added into the relocation addend in this shared
1097 1.1 skrll library, but must be handled only at dynamic-link
1098 1.1 skrll time. FIXME: Not sure this example covers the
1099 1.1 skrll h->elf_link_hash_flags test, though it's there in
1100 1.1 skrll other targets. */
1101 1.1 skrll if (bfd_link_pic (info)
1102 1.1 skrll && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1103 1.1 skrll || !h->def_regular)
1104 1.1 skrll && (input_section->flags & SEC_ALLOC) != 0
1105 1.1 skrll && (r_type == R_CRIS_8
1106 1.1.1.4 christos || r_type == R_CRIS_16
1107 1.1.1.3 christos || r_type == R_CRIS_32
1108 1.1.1.3 christos || r_type == R_CRIS_8_PCREL
1109 1.1.1.3 christos || r_type == R_CRIS_16_PCREL
1110 1.1.1.3 christos || r_type == R_CRIS_32_PCREL))
1111 1.1 skrll relocation = 0;
1112 1.1 skrll else if (!bfd_link_relocatable (info) && unresolved_reloc
1113 1.1 skrll && (_bfd_elf_section_offset (output_bfd, info,
1114 1.1 skrll input_section,
1115 1.1 skrll rel->r_offset)
1116 1.1 skrll != (bfd_vma) -1))
1117 1.1 skrll {
1118 1.1 skrll _bfd_error_handler
1119 1.1 skrll (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1120 1.1 skrll input_bfd,
1121 1.1 skrll input_section,
1122 1.1 skrll cris_elf_howto_table[r_type].name,
1123 1.1 skrll symname);
1124 1.1.1.3 christos bfd_set_error (bfd_error_bad_value);
1125 1.1.1.2 christos return FALSE;
1126 1.1.1.3 christos }
1127 1.1 skrll }
1128 1.1.1.4 christos }
1129 1.1 skrll
1130 1.1 skrll if (sec != NULL && discarded_section (sec))
1131 1.1 skrll RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1132 1.1 skrll rel, 1, relend, howto, 0, contents);
1133 1.1 skrll
1134 1.1 skrll if (bfd_link_relocatable (info))
1135 1.1 skrll continue;
1136 1.1 skrll
1137 1.1 skrll switch (r_type)
1138 1.1 skrll {
1139 1.1 skrll case R_CRIS_16_GOTPLT:
1140 1.1 skrll case R_CRIS_32_GOTPLT:
1141 1.1 skrll /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1142 1.1 skrll but we require a PLT, and the PLT handling will take care of
1143 1.1 skrll filling in the PLT-specific GOT entry. For the GOT offset,
1144 1.1.1.3 christos calculate it as we do when filling it in for the .got.plt
1145 1.1 skrll section. If we don't have a PLT, punt to GOT handling. */
1146 1.1 skrll if (h != NULL
1147 1.1 skrll && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1148 1.1 skrll {
1149 1.1 skrll asection *sgotplt
1150 1.1 skrll = bfd_get_linker_section (dynobj, ".got.plt");
1151 1.1 skrll bfd_vma got_offset;
1152 1.1 skrll
1153 1.1 skrll BFD_ASSERT (h->dynindx != -1);
1154 1.1 skrll BFD_ASSERT (sgotplt != NULL);
1155 1.1 skrll
1156 1.1 skrll got_offset
1157 1.1 skrll = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1158 1.1 skrll
1159 1.1 skrll relocation = got_offset;
1160 1.1 skrll break;
1161 1.1 skrll }
1162 1.1 skrll
1163 1.1 skrll /* We didn't make a PLT entry for this symbol. Maybe everything is
1164 1.1 skrll folded into the GOT. Other than folding, this happens when
1165 1.1 skrll statically linking PIC code, or when using -Bsymbolic. Check
1166 1.1 skrll that we instead have a GOT entry as done for us by
1167 1.1 skrll elf_cris_adjust_dynamic_symbol, and drop through into the
1168 1.1.1.4 christos ordinary GOT cases. This must not happen for the
1169 1.1 skrll executable, because any reference it does to a function
1170 1.1 skrll that is satisfied by a DSO must generate a PLT. We assume
1171 1.1 skrll these call-specific relocs don't address non-functions. */
1172 1.1 skrll if (h != NULL
1173 1.1 skrll && (h->got.offset == (bfd_vma) -1
1174 1.1 skrll || (!bfd_link_pic (info)
1175 1.1 skrll && !(h->def_regular
1176 1.1 skrll || (!h->def_dynamic
1177 1.1 skrll && h->root.type == bfd_link_hash_undefweak)))))
1178 1.1 skrll {
1179 1.1 skrll (*_bfd_error_handler)
1180 1.1 skrll ((h->got.offset == (bfd_vma) -1)
1181 1.1 skrll ? _("%B, section %A: No PLT nor GOT for relocation %s"
1182 1.1 skrll " against symbol `%s'")
1183 1.1 skrll : _("%B, section %A: No PLT for relocation %s"
1184 1.1 skrll " against symbol `%s'"),
1185 1.1 skrll input_bfd,
1186 1.1 skrll input_section,
1187 1.1 skrll cris_elf_howto_table[r_type].name,
1188 1.1 skrll (symname != NULL && symname[0] != '\0'
1189 1.1 skrll ? symname : _("[whose name is lost]")));
1190 1.1 skrll
1191 1.1 skrll /* FIXME: Perhaps blaming input is not the right thing to
1192 1.1 skrll do; this is probably an internal error. But it is true
1193 1.1 skrll that we didn't like that particular input. */
1194 1.1 skrll bfd_set_error (bfd_error_bad_value);
1195 1.1 skrll return FALSE;
1196 1.1 skrll }
1197 1.1 skrll /* Fall through. */
1198 1.1 skrll
1199 1.1 skrll /* The size of the actual relocation is not used here; we only
1200 1.1 skrll fill in the GOT table here. */
1201 1.1 skrll case R_CRIS_16_GOT:
1202 1.1 skrll case R_CRIS_32_GOT:
1203 1.1 skrll {
1204 1.1 skrll bfd_vma off;
1205 1.1 skrll
1206 1.1 skrll /* Note that despite using RELA relocations, the .got contents
1207 1.1 skrll is always filled in with the link-relative relocation
1208 1.1 skrll value; the addend. */
1209 1.1 skrll
1210 1.1.1.4 christos if (h != NULL)
1211 1.1 skrll {
1212 1.1 skrll off = h->got.offset;
1213 1.1 skrll BFD_ASSERT (off != (bfd_vma) -1);
1214 1.1.1.4 christos
1215 1.1.1.4 christos if (!elf_hash_table (info)->dynamic_sections_created
1216 1.1 skrll || (! bfd_link_pic (info)
1217 1.1 skrll && (h->def_regular
1218 1.1.1.4 christos || h->type == STT_FUNC
1219 1.1 skrll || h->needs_plt))
1220 1.1 skrll || (bfd_link_pic (info)
1221 1.1 skrll && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1222 1.1 skrll && h->def_regular))
1223 1.1.1.4 christos {
1224 1.1 skrll /* This wasn't checked above for ! bfd_link_pic (info), but
1225 1.1 skrll must hold there if we get here; the symbol must
1226 1.1 skrll be defined in the regular program or be undefweak
1227 1.1 skrll or be a function or otherwise need a PLT. */
1228 1.1 skrll BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1229 1.1 skrll || bfd_link_pic (info)
1230 1.1 skrll || h->def_regular
1231 1.1 skrll || h->type == STT_FUNC
1232 1.1 skrll || h->needs_plt
1233 1.1 skrll || h->root.type == bfd_link_hash_undefweak);
1234 1.1 skrll
1235 1.1 skrll /* This is actually a static link, or it is a
1236 1.1 skrll -Bsymbolic link and the symbol is defined locally,
1237 1.1 skrll or is undefweak, or the symbol was forced to be
1238 1.1 skrll local because of a version file, or we're not
1239 1.1 skrll creating a dynamic object. We must initialize this
1240 1.1 skrll entry in the global offset table. Since the offset
1241 1.1 skrll must always be a multiple of 4, we use the least
1242 1.1 skrll significant bit to record whether we have
1243 1.1 skrll initialized it already.
1244 1.1 skrll
1245 1.1 skrll If this GOT entry should be runtime-initialized, we
1246 1.1 skrll will create a .rela.got relocation entry to
1247 1.1 skrll initialize the value. This is done in the
1248 1.1 skrll finish_dynamic_symbol routine. */
1249 1.1 skrll if ((off & 1) != 0)
1250 1.1 skrll off &= ~1;
1251 1.1 skrll else
1252 1.1 skrll {
1253 1.1 skrll bfd_put_32 (output_bfd, relocation,
1254 1.1 skrll sgot->contents + off);
1255 1.1 skrll h->got.offset |= 1;
1256 1.1 skrll }
1257 1.1 skrll }
1258 1.1 skrll }
1259 1.1 skrll else
1260 1.1 skrll {
1261 1.1 skrll BFD_ASSERT (local_got_offsets != NULL
1262 1.1 skrll && local_got_offsets[r_symndx] != (bfd_vma) -1);
1263 1.1 skrll
1264 1.1 skrll off = local_got_offsets[r_symndx];
1265 1.1 skrll
1266 1.1 skrll /* The offset must always be a multiple of 4. We use
1267 1.1 skrll the least significant bit to record whether we have
1268 1.1 skrll already generated the necessary reloc. */
1269 1.1.1.4 christos if ((off & 1) != 0)
1270 1.1 skrll off &= ~1;
1271 1.1 skrll else
1272 1.1 skrll {
1273 1.1 skrll bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1274 1.1.1.2 christos
1275 1.1.1.2 christos if (bfd_link_pic (info))
1276 1.1.1.3 christos {
1277 1.1.1.2 christos Elf_Internal_Rela outrel;
1278 1.1 skrll bfd_byte *loc;
1279 1.1 skrll
1280 1.1 skrll if (srelgot == NULL)
1281 1.1 skrll srelgot
1282 1.1 skrll = bfd_get_linker_section (dynobj, ".rela.got");
1283 1.1 skrll BFD_ASSERT (srelgot != NULL);
1284 1.1.1.2 christos
1285 1.1.1.2 christos outrel.r_offset = (sgot->output_section->vma
1286 1.1 skrll + sgot->output_offset
1287 1.1 skrll + off);
1288 1.1 skrll outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1289 1.1 skrll outrel.r_addend = relocation;
1290 1.1 skrll loc = srelgot->contents;
1291 1.1 skrll loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1292 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1293 1.1 skrll }
1294 1.1 skrll
1295 1.1 skrll local_got_offsets[r_symndx] |= 1;
1296 1.1 skrll }
1297 1.1 skrll }
1298 1.1 skrll
1299 1.1 skrll relocation = sgot->output_offset + off;
1300 1.1 skrll if (rel->r_addend != 0)
1301 1.1 skrll {
1302 1.1 skrll /* We can't do anything for a relocation which is against
1303 1.1 skrll a symbol *plus offset*. GOT holds relocations for
1304 1.1 skrll symbols. Make this an error; the compiler isn't
1305 1.1 skrll allowed to pass us these kinds of things. */
1306 1.1 skrll if (h == NULL)
1307 1.1 skrll (*_bfd_error_handler)
1308 1.1 skrll (_("%B, section %A: relocation %s with non-zero addend %d"
1309 1.1 skrll " against local symbol"),
1310 1.1 skrll input_bfd,
1311 1.1 skrll input_section,
1312 1.1 skrll cris_elf_howto_table[r_type].name,
1313 1.1 skrll rel->r_addend);
1314 1.1 skrll else
1315 1.1 skrll (*_bfd_error_handler)
1316 1.1 skrll (_("%B, section %A: relocation %s with non-zero addend %d"
1317 1.1 skrll " against symbol `%s'"),
1318 1.1 skrll input_bfd,
1319 1.1 skrll input_section,
1320 1.1 skrll cris_elf_howto_table[r_type].name,
1321 1.1 skrll rel->r_addend,
1322 1.1 skrll symname[0] != '\0' ? symname : _("[whose name is lost]"));
1323 1.1 skrll
1324 1.1 skrll bfd_set_error (bfd_error_bad_value);
1325 1.1 skrll return FALSE;
1326 1.1 skrll }
1327 1.1 skrll }
1328 1.1 skrll break;
1329 1.1 skrll
1330 1.1.1.4 christos case R_CRIS_32_GOTREL:
1331 1.1 skrll /* This relocation must only be performed against local symbols.
1332 1.1 skrll It's also ok when we link a program and the symbol is either
1333 1.1 skrll defined in an ordinary (non-DSO) object or is undefined weak. */
1334 1.1 skrll if (h != NULL
1335 1.1 skrll && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1336 1.1 skrll && !(!bfd_link_pic (info)
1337 1.1 skrll && (h->def_regular
1338 1.1 skrll || (!h->def_dynamic
1339 1.1 skrll && h->root.type == bfd_link_hash_undefweak))))
1340 1.1 skrll {
1341 1.1 skrll (*_bfd_error_handler)
1342 1.1 skrll (_("%B, section %A: relocation %s is"
1343 1.1 skrll " not allowed for global symbol: `%s'"),
1344 1.1 skrll input_bfd,
1345 1.1 skrll input_section,
1346 1.1 skrll cris_elf_howto_table[r_type].name,
1347 1.1 skrll symname);
1348 1.1 skrll bfd_set_error (bfd_error_bad_value);
1349 1.1 skrll return FALSE;
1350 1.1 skrll }
1351 1.1 skrll
1352 1.1 skrll /* This can happen if we get a link error with the input ELF
1353 1.1 skrll variant mismatching the output variant. Emit an error so
1354 1.1 skrll it's noticed if it happens elsewhere. */
1355 1.1 skrll if (sgot == NULL)
1356 1.1 skrll {
1357 1.1 skrll (*_bfd_error_handler)
1358 1.1 skrll (_("%B, section %A: relocation %s with no GOT created"),
1359 1.1 skrll input_bfd,
1360 1.1 skrll input_section,
1361 1.1 skrll cris_elf_howto_table[r_type].name);
1362 1.1 skrll bfd_set_error (bfd_error_bad_value);
1363 1.1 skrll return FALSE;
1364 1.1 skrll }
1365 1.1 skrll
1366 1.1 skrll /* This relocation is like a PC-relative one, except the
1367 1.1 skrll reference point is the location of GOT. Note that
1368 1.1 skrll sgot->output_offset is not involved in this calculation. We
1369 1.1 skrll always want the start of entire .got section, not the
1370 1.1 skrll position after the reserved header. */
1371 1.1 skrll relocation -= sgot->output_section->vma;
1372 1.1 skrll break;
1373 1.1 skrll
1374 1.1 skrll case R_CRIS_32_PLT_PCREL:
1375 1.1 skrll /* Relocation is to the entry for this symbol in the
1376 1.1 skrll procedure linkage table. */
1377 1.1 skrll
1378 1.1 skrll /* Resolve a PLT_PCREL reloc against a local symbol directly,
1379 1.1 skrll without using the procedure linkage table. */
1380 1.1 skrll if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1381 1.1 skrll break;
1382 1.1 skrll
1383 1.1 skrll if (h->plt.offset == (bfd_vma) -1
1384 1.1 skrll || splt == NULL)
1385 1.1 skrll {
1386 1.1 skrll /* We didn't make a PLT entry for this symbol. This
1387 1.1 skrll happens when statically linking PIC code, or when
1388 1.1 skrll using -Bsymbolic. */
1389 1.1 skrll break;
1390 1.1 skrll }
1391 1.1 skrll
1392 1.1 skrll relocation = (splt->output_section->vma
1393 1.1 skrll + splt->output_offset
1394 1.1 skrll + h->plt.offset);
1395 1.1 skrll break;
1396 1.1 skrll
1397 1.1 skrll case R_CRIS_32_PLT_GOTREL:
1398 1.1 skrll /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1399 1.1 skrll start of the .got section. See also comment at
1400 1.1 skrll R_CRIS_32_GOT. */
1401 1.1 skrll relocation -= sgot->output_section->vma;
1402 1.1 skrll
1403 1.1 skrll /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1404 1.1 skrll without using the procedure linkage table. */
1405 1.1 skrll if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1406 1.1 skrll break;
1407 1.1 skrll
1408 1.1 skrll if (h->plt.offset == (bfd_vma) -1
1409 1.1 skrll || splt == NULL)
1410 1.1 skrll {
1411 1.1 skrll /* We didn't make a PLT entry for this symbol. This
1412 1.1 skrll happens when statically linking PIC code, or when
1413 1.1 skrll using -Bsymbolic. */
1414 1.1 skrll break;
1415 1.1 skrll }
1416 1.1 skrll
1417 1.1 skrll relocation = (splt->output_section->vma
1418 1.1 skrll + splt->output_offset
1419 1.1 skrll + h->plt.offset
1420 1.1 skrll - sgot->output_section->vma);
1421 1.1.1.2 christos break;
1422 1.1.1.2 christos
1423 1.1 skrll case R_CRIS_8_PCREL:
1424 1.1 skrll case R_CRIS_16_PCREL:
1425 1.1 skrll case R_CRIS_32_PCREL:
1426 1.1 skrll /* If the symbol was local, we need no shlib-specific handling. */
1427 1.1 skrll if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1428 1.1 skrll || h->dynindx == -1)
1429 1.1.1.4 christos break;
1430 1.1.1.2 christos
1431 1.1 skrll /* Fall through. */
1432 1.1 skrll case R_CRIS_8:
1433 1.1 skrll case R_CRIS_16:
1434 1.1 skrll case R_CRIS_32:
1435 1.1.1.4 christos if (bfd_link_pic (info)
1436 1.1.1.2 christos && r_symndx != STN_UNDEF
1437 1.1 skrll && (input_section->flags & SEC_ALLOC) != 0
1438 1.1 skrll && ((r_type != R_CRIS_8_PCREL
1439 1.1 skrll && r_type != R_CRIS_16_PCREL
1440 1.1 skrll && r_type != R_CRIS_32_PCREL)
1441 1.1 skrll || (!SYMBOLIC_BIND (info, h)
1442 1.1 skrll || (h != NULL && !h->def_regular))))
1443 1.1 skrll {
1444 1.1 skrll Elf_Internal_Rela outrel;
1445 1.1 skrll bfd_byte *loc;
1446 1.1 skrll bfd_boolean skip, relocate;
1447 1.1 skrll
1448 1.1.1.2 christos /* When generating a shared object, these relocations
1449 1.1.1.2 christos are copied into the output file to be resolved at run
1450 1.1.1.2 christos time. */
1451 1.1.1.2 christos
1452 1.1 skrll if (sreloc == NULL)
1453 1.1 skrll {
1454 1.1 skrll sreloc = _bfd_elf_get_dynamic_reloc_section
1455 1.1 skrll (dynobj, input_section, /*rela?*/ TRUE);
1456 1.1 skrll /* The section should have been created in cris_elf_check_relocs,
1457 1.1 skrll but that function will not be called for objects which fail in
1458 1.1 skrll cris_elf_merge_private_bfd_data. */
1459 1.1 skrll if (sreloc == NULL)
1460 1.1 skrll {
1461 1.1 skrll bfd_set_error (bfd_error_bad_value);
1462 1.1 skrll return FALSE;
1463 1.1 skrll }
1464 1.1 skrll }
1465 1.1 skrll
1466 1.1 skrll skip = FALSE;
1467 1.1 skrll relocate = FALSE;
1468 1.1.1.2 christos
1469 1.1.1.2 christos outrel.r_offset =
1470 1.1.1.2 christos _bfd_elf_section_offset (output_bfd, info, input_section,
1471 1.1.1.2 christos rel->r_offset);
1472 1.1.1.2 christos if (outrel.r_offset == (bfd_vma) -1)
1473 1.1.1.2 christos skip = TRUE;
1474 1.1.1.2 christos else if (outrel.r_offset == (bfd_vma) -2
1475 1.1.1.2 christos /* For now, undefined weak symbols with non-default
1476 1.1.1.2 christos visibility (yielding 0), like exception info for
1477 1.1.1.2 christos discarded sections, will get a R_CRIS_NONE
1478 1.1 skrll relocation rather than no relocation, because we
1479 1.1 skrll notice too late that the symbol doesn't need a
1480 1.1 skrll relocation. */
1481 1.1 skrll || (h != NULL
1482 1.1 skrll && h->root.type == bfd_link_hash_undefweak
1483 1.1 skrll && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1484 1.1 skrll skip = TRUE, relocate = TRUE;
1485 1.1 skrll outrel.r_offset += (input_section->output_section->vma
1486 1.1 skrll + input_section->output_offset);
1487 1.1.1.4 christos
1488 1.1 skrll if (skip)
1489 1.1 skrll memset (&outrel, 0, sizeof outrel);
1490 1.1 skrll /* h->dynindx may be -1 if the symbol was marked to
1491 1.1 skrll become local. */
1492 1.1 skrll else if (h != NULL
1493 1.1 skrll && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1494 1.1 skrll || !h->def_regular))
1495 1.1 skrll {
1496 1.1 skrll BFD_ASSERT (h->dynindx != -1);
1497 1.1 skrll outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1498 1.1 skrll outrel.r_addend = relocation + rel->r_addend;
1499 1.1 skrll }
1500 1.1 skrll else
1501 1.1 skrll {
1502 1.1 skrll outrel.r_addend = relocation + rel->r_addend;
1503 1.1 skrll
1504 1.1 skrll if (r_type == R_CRIS_32)
1505 1.1 skrll {
1506 1.1 skrll relocate = TRUE;
1507 1.1 skrll outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1508 1.1 skrll }
1509 1.1 skrll else
1510 1.1 skrll {
1511 1.1 skrll long indx;
1512 1.1 skrll
1513 1.1 skrll if (bfd_is_abs_section (sec))
1514 1.1 skrll indx = 0;
1515 1.1 skrll else if (sec == NULL || sec->owner == NULL)
1516 1.1 skrll {
1517 1.1 skrll bfd_set_error (bfd_error_bad_value);
1518 1.1 skrll return FALSE;
1519 1.1 skrll }
1520 1.1 skrll else
1521 1.1 skrll {
1522 1.1 skrll asection *osec;
1523 1.1 skrll
1524 1.1 skrll /* We are turning this relocation into one
1525 1.1 skrll against a section symbol. It would be
1526 1.1 skrll proper to subtract the symbol's value,
1527 1.1 skrll osec->vma, from the emitted reloc addend,
1528 1.1 skrll but ld.so expects buggy relocs. */
1529 1.1 skrll osec = sec->output_section;
1530 1.1 skrll indx = elf_section_data (osec)->dynindx;
1531 1.1 skrll if (indx == 0)
1532 1.1 skrll {
1533 1.1 skrll osec = htab->root.text_index_section;
1534 1.1 skrll indx = elf_section_data (osec)->dynindx;
1535 1.1 skrll }
1536 1.1 skrll BFD_ASSERT (indx != 0);
1537 1.1 skrll }
1538 1.1 skrll
1539 1.1 skrll outrel.r_info = ELF32_R_INFO (indx, r_type);
1540 1.1 skrll }
1541 1.1 skrll }
1542 1.1 skrll
1543 1.1 skrll loc = sreloc->contents;
1544 1.1 skrll loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1545 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1546 1.1 skrll
1547 1.1 skrll /* This reloc will be computed at runtime, so there's no
1548 1.1 skrll need to do anything now, except for R_CRIS_32 relocations
1549 1.1.1.2 christos that have been turned into R_CRIS_RELATIVE. */
1550 1.1.1.2 christos if (!relocate)
1551 1.1.1.2 christos continue;
1552 1.1.1.2 christos }
1553 1.1.1.2 christos
1554 1.1.1.2 christos break;
1555 1.1.1.2 christos
1556 1.1.1.2 christos case R_CRIS_16_DTPREL:
1557 1.1.1.2 christos case R_CRIS_32_DTPREL:
1558 1.1.1.2 christos /* This relocation must only be performed against local
1559 1.1.1.2 christos symbols, or to sections that are not loadable. It's also
1560 1.1.1.4 christos ok when we link a program and the symbol is defined in an
1561 1.1.1.2 christos ordinary (non-DSO) object (if it's undefined there, we've
1562 1.1.1.2 christos already seen an error). */
1563 1.1.1.2 christos if (h != NULL
1564 1.1.1.2 christos && (input_section->flags & SEC_ALLOC) != 0
1565 1.1.1.2 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1566 1.1.1.2 christos && (bfd_link_pic (info)
1567 1.1.1.2 christos || (!h->def_regular
1568 1.1.1.2 christos && h->root.type != bfd_link_hash_undefined)))
1569 1.1.1.2 christos {
1570 1.1.1.2 christos (*_bfd_error_handler)
1571 1.1.1.2 christos ((h->root.type == bfd_link_hash_undefined)
1572 1.1.1.2 christos /* We shouldn't get here for GCC-emitted code. */
1573 1.1.1.2 christos ? _("%B, section %A: relocation %s has an undefined"
1574 1.1.1.2 christos " reference to `%s', perhaps a declaration mixup?")
1575 1.1.1.2 christos : ("%B, section %A: relocation %s is"
1576 1.1.1.2 christos " not allowed for `%s', a global symbol with default"
1577 1.1.1.2 christos " visibility, perhaps a declaration mixup?"),
1578 1.1.1.2 christos input_bfd,
1579 1.1.1.2 christos input_section,
1580 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1581 1.1.1.2 christos symname != NULL && symname[0] != '\0'
1582 1.1.1.2 christos ? symname : _("[whose name is lost]"));
1583 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1584 1.1.1.2 christos return FALSE;
1585 1.1.1.2 christos }
1586 1.1.1.2 christos
1587 1.1.1.2 christos BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1588 1.1.1.2 christos || htab->dtpmod_refcount != 0);
1589 1.1.1.2 christos
1590 1.1.1.2 christos /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1591 1.1.1.2 christos already done so. Note that we do this in .got.plt, not
1592 1.1.1.3 christos in .got, as .got.plt contains the first part, still the
1593 1.1.1.2 christos reloc is against .got, because the linker script directs
1594 1.1.1.2 christos (is required to direct) them both into .got. */
1595 1.1.1.4 christos if (htab->dtpmod_refcount > 0
1596 1.1.1.2 christos && (input_section->flags & SEC_ALLOC) != 0)
1597 1.1.1.2 christos {
1598 1.1.1.2 christos asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1599 1.1.1.2 christos BFD_ASSERT (sgotplt != NULL);
1600 1.1.1.2 christos
1601 1.1.1.3 christos if (bfd_link_pic (info))
1602 1.1.1.2 christos {
1603 1.1.1.2 christos Elf_Internal_Rela outrel;
1604 1.1.1.2 christos bfd_byte *loc;
1605 1.1.1.2 christos
1606 1.1.1.2 christos if (srelgot == NULL)
1607 1.1.1.2 christos srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1608 1.1.1.2 christos BFD_ASSERT (srelgot != NULL);
1609 1.1.1.2 christos loc = srelgot->contents;
1610 1.1.1.2 christos loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1611 1.1.1.2 christos
1612 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1613 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1614 1.1.1.2 christos outrel.r_offset = (sgotplt->output_section->vma
1615 1.1.1.2 christos + sgotplt->output_offset
1616 1.1.1.2 christos + 12);
1617 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1618 1.1.1.2 christos outrel.r_addend = 0;
1619 1.1.1.2 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1620 1.1.1.2 christos }
1621 1.1.1.2 christos else
1622 1.1.1.2 christos {
1623 1.1.1.2 christos /* For an executable, the GOT entry contents is known. */
1624 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1625 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1626 1.1.1.2 christos }
1627 1.1.1.2 christos
1628 1.1.1.2 christos /* Reverse the sign to mark that we've emitted the
1629 1.1.1.2 christos required GOT entry. */
1630 1.1.1.2 christos htab->dtpmod_refcount = - htab->dtpmod_refcount;
1631 1.1.1.2 christos }
1632 1.1.1.2 christos
1633 1.1.1.2 christos /* The relocation is the offset from the start of the module
1634 1.1.1.4 christos TLS block to the (local) symbol. */
1635 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1636 1.1.1.2 christos ? 0 : elf_hash_table (info)->tls_sec->vma;
1637 1.1.1.2 christos break;
1638 1.1.1.2 christos
1639 1.1.1.2 christos case R_CRIS_32_GD:
1640 1.1.1.2 christos if (bfd_link_pic (info))
1641 1.1.1.2 christos {
1642 1.1.1.2 christos bfd_set_error (bfd_error_invalid_operation);
1643 1.1.1.2 christos
1644 1.1.1.2 christos /* We've already informed in cris_elf_check_relocs that
1645 1.1.1.2 christos this is an error. */
1646 1.1.1.2 christos return FALSE;
1647 1.1.1.2 christos }
1648 1.1.1.2 christos /* Fall through. */
1649 1.1.1.2 christos
1650 1.1.1.2 christos case R_CRIS_16_GOT_GD:
1651 1.1.1.2 christos case R_CRIS_32_GOT_GD:
1652 1.1.1.2 christos if (rel->r_addend != 0)
1653 1.1.1.2 christos {
1654 1.1.1.2 christos /* We can't do anything for a relocation which is against a
1655 1.1.1.2 christos symbol *plus offset*. The GOT holds relocations for
1656 1.1.1.2 christos symbols. Make this an error; the compiler isn't allowed
1657 1.1.1.2 christos to pass us these kinds of things. */
1658 1.1.1.2 christos (*_bfd_error_handler)
1659 1.1.1.2 christos (_("%B, section %A: relocation %s with non-zero addend %d"
1660 1.1.1.2 christos " against symbol `%s'"),
1661 1.1.1.2 christos input_bfd,
1662 1.1.1.2 christos input_section,
1663 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1664 1.1.1.2 christos rel->r_addend,
1665 1.1.1.4 christos symname[0] != '\0' ? symname : _("[whose name is lost]"));
1666 1.1.1.2 christos
1667 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1668 1.1.1.2 christos return FALSE;
1669 1.1.1.2 christos }
1670 1.1.1.2 christos
1671 1.1.1.2 christos if (!bfd_link_pic (info)
1672 1.1.1.2 christos && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1673 1.1.1.2 christos {
1674 1.1.1.2 christos /* Known contents of the GOT. */
1675 1.1.1.2 christos bfd_vma off;
1676 1.1.1.2 christos
1677 1.1.1.2 christos /* The symbol is defined in the program, so just write
1678 1.1.1.2 christos (1, known_tpoffset) into the GOT. */
1679 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec->vma;
1680 1.1.1.2 christos
1681 1.1.1.2 christos if (h != NULL)
1682 1.1.1.2 christos {
1683 1.1.1.2 christos off = elf_cris_hash_entry (h)->tprel_refcount > 0
1684 1.1.1.2 christos ? h->got.offset + 4 : h->got.offset;
1685 1.1.1.2 christos }
1686 1.1.1.2 christos else
1687 1.1.1.2 christos {
1688 1.1.1.2 christos off = local_got_offsets[r_symndx];
1689 1.1.1.2 christos if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1690 1.1.1.2 christos off += 4;
1691 1.1.1.2 christos }
1692 1.1.1.2 christos
1693 1.1.1.2 christos /* We use bit 1 of the offset as a flag for GOT entry with
1694 1.1.1.2 christos the R_CRIS_DTP reloc, setting it when we've emitted the
1695 1.1.1.2 christos GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1696 1.1.1.2 christos relocs. */
1697 1.1.1.2 christos if ((off & 2) == 0)
1698 1.1.1.2 christos {
1699 1.1.1.2 christos off &= ~3;
1700 1.1.1.2 christos
1701 1.1.1.2 christos if (h != NULL)
1702 1.1.1.2 christos h->got.offset |= 2;
1703 1.1.1.2 christos else
1704 1.1.1.2 christos local_got_offsets[r_symndx] |= 2;
1705 1.1.1.2 christos
1706 1.1.1.2 christos bfd_put_32 (output_bfd, 1, sgot->contents + off);
1707 1.1.1.2 christos bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1708 1.1.1.2 christos }
1709 1.1.1.2 christos else
1710 1.1.1.2 christos off &= ~3;
1711 1.1.1.2 christos
1712 1.1.1.2 christos relocation = sgot->output_offset + off
1713 1.1.1.2 christos + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1714 1.1.1.2 christos }
1715 1.1.1.2 christos else
1716 1.1.1.2 christos {
1717 1.1.1.2 christos /* Not all parts of the GOT entry are known; emit a real
1718 1.1.1.2 christos relocation. */
1719 1.1.1.2 christos bfd_vma off;
1720 1.1.1.2 christos
1721 1.1.1.2 christos if (h != NULL)
1722 1.1.1.2 christos off = elf_cris_hash_entry (h)->tprel_refcount > 0
1723 1.1.1.2 christos ? h->got.offset + 4 : h->got.offset;
1724 1.1.1.2 christos else
1725 1.1.1.2 christos {
1726 1.1.1.2 christos off = local_got_offsets[r_symndx];
1727 1.1.1.2 christos if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1728 1.1.1.2 christos off += 4;
1729 1.1.1.2 christos }
1730 1.1.1.2 christos
1731 1.1.1.2 christos /* See above re bit 1 and bit 0 usage. */
1732 1.1.1.2 christos if ((off & 2) == 0)
1733 1.1.1.2 christos {
1734 1.1.1.2 christos Elf_Internal_Rela outrel;
1735 1.1.1.2 christos bfd_byte *loc;
1736 1.1.1.2 christos
1737 1.1.1.2 christos off &= ~3;
1738 1.1.1.2 christos
1739 1.1.1.2 christos if (h != NULL)
1740 1.1.1.2 christos h->got.offset |= 2;
1741 1.1.1.2 christos else
1742 1.1.1.2 christos local_got_offsets[r_symndx] |= 2;
1743 1.1.1.2 christos
1744 1.1.1.2 christos /* Clear the target contents of the GOT (just as a
1745 1.1.1.3 christos gesture; it's already cleared on allocation): this
1746 1.1.1.2 christos relocation is not like the other dynrelocs. */
1747 1.1.1.2 christos bfd_put_32 (output_bfd, 0, sgot->contents + off);
1748 1.1.1.2 christos bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1749 1.1.1.2 christos
1750 1.1.1.2 christos if (srelgot == NULL)
1751 1.1.1.2 christos srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1752 1.1.1.2 christos BFD_ASSERT (srelgot != NULL);
1753 1.1.1.2 christos
1754 1.1.1.2 christos if (h != NULL && h->dynindx != -1)
1755 1.1.1.2 christos {
1756 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1757 1.1.1.2 christos relocation = 0;
1758 1.1.1.2 christos }
1759 1.1.1.2 christos else
1760 1.1.1.2 christos {
1761 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1762 1.1.1.2 christos
1763 1.1.1.2 christos /* NULL if we had an error. */
1764 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1765 1.1.1.2 christos ? 0 : elf_hash_table (info)->tls_sec->vma;
1766 1.1.1.2 christos }
1767 1.1.1.2 christos
1768 1.1.1.2 christos outrel.r_offset = (sgot->output_section->vma
1769 1.1.1.2 christos + sgot->output_offset
1770 1.1.1.2 christos + off);
1771 1.1.1.2 christos outrel.r_addend = relocation;
1772 1.1.1.2 christos loc = srelgot->contents;
1773 1.1.1.2 christos loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1774 1.1.1.2 christos
1775 1.1.1.2 christos /* NULL if we had an error. */
1776 1.1.1.2 christos if (srelgot->contents != NULL)
1777 1.1.1.2 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1778 1.1.1.2 christos }
1779 1.1.1.2 christos else
1780 1.1.1.2 christos off &= ~3;
1781 1.1.1.2 christos
1782 1.1.1.2 christos relocation = sgot->output_offset + off
1783 1.1.1.2 christos + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1784 1.1.1.2 christos }
1785 1.1.1.2 christos
1786 1.1.1.4 christos /* The GOT-relative offset to the GOT entry is the
1787 1.1.1.2 christos relocation, or for R_CRIS_32_GD, the actual address of
1788 1.1.1.2 christos the GOT entry. */
1789 1.1.1.2 christos break;
1790 1.1.1.2 christos
1791 1.1.1.2 christos case R_CRIS_32_IE:
1792 1.1.1.2 christos if (bfd_link_pic (info))
1793 1.1.1.2 christos {
1794 1.1.1.2 christos bfd_set_error (bfd_error_invalid_operation);
1795 1.1.1.2 christos
1796 1.1.1.2 christos /* We've already informed in cris_elf_check_relocs that
1797 1.1.1.2 christos this is an error. */
1798 1.1.1.2 christos return FALSE;
1799 1.1.1.2 christos }
1800 1.1.1.2 christos /* Fall through. */
1801 1.1.1.2 christos
1802 1.1.1.2 christos case R_CRIS_32_GOT_TPREL:
1803 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
1804 1.1.1.2 christos if (rel->r_addend != 0)
1805 1.1.1.2 christos {
1806 1.1.1.2 christos /* We can't do anything for a relocation which is
1807 1.1.1.2 christos against a symbol *plus offset*. GOT holds
1808 1.1.1.2 christos relocations for symbols. Make this an error; the
1809 1.1.1.2 christos compiler isn't allowed to pass us these kinds of
1810 1.1.1.2 christos things. */
1811 1.1.1.2 christos (*_bfd_error_handler)
1812 1.1.1.2 christos (_("%B, section %A: relocation %s with non-zero addend %d"
1813 1.1.1.2 christos " against symbol `%s'"),
1814 1.1.1.2 christos input_bfd,
1815 1.1.1.2 christos input_section,
1816 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1817 1.1.1.4 christos rel->r_addend,
1818 1.1.1.3 christos symname[0] != '\0' ? symname : _("[whose name is lost]"));
1819 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1820 1.1.1.2 christos return FALSE;
1821 1.1.1.2 christos }
1822 1.1.1.2 christos
1823 1.1.1.2 christos if (!bfd_link_pic (info)
1824 1.1.1.2 christos && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1825 1.1.1.2 christos {
1826 1.1.1.2 christos /* Known contents of the GOT. */
1827 1.1.1.2 christos bfd_vma off;
1828 1.1.1.2 christos
1829 1.1.1.2 christos /* The symbol is defined in the program, so just write
1830 1.1.1.2 christos the -prog_tls_size+known_tpoffset into the GOT. */
1831 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec->vma;
1832 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_size;
1833 1.1.1.2 christos
1834 1.1.1.2 christos if (h != NULL)
1835 1.1.1.2 christos off = h->got.offset;
1836 1.1.1.2 christos else
1837 1.1.1.2 christos off = local_got_offsets[r_symndx];
1838 1.1.1.2 christos
1839 1.1.1.2 christos /* Bit 0 is used to mark whether we've emitted the required
1840 1.1.1.2 christos entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1841 1.1.1.2 christos is used similarly for R_CRIS_DTP, see above. */
1842 1.1.1.2 christos if ((off & 1) == 0)
1843 1.1.1.2 christos {
1844 1.1.1.2 christos off &= ~3;
1845 1.1.1.2 christos
1846 1.1.1.2 christos if (h != NULL)
1847 1.1.1.2 christos h->got.offset |= 1;
1848 1.1.1.2 christos else
1849 1.1.1.2 christos local_got_offsets[r_symndx] |= 1;
1850 1.1.1.2 christos
1851 1.1.1.2 christos bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1852 1.1.1.2 christos }
1853 1.1.1.2 christos else
1854 1.1.1.2 christos off &= ~3;
1855 1.1.1.2 christos
1856 1.1.1.2 christos relocation = sgot->output_offset + off
1857 1.1.1.2 christos + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1858 1.1.1.2 christos }
1859 1.1.1.2 christos else
1860 1.1.1.2 christos {
1861 1.1.1.2 christos /* Emit a real relocation. */
1862 1.1.1.2 christos bfd_vma off;
1863 1.1.1.2 christos
1864 1.1.1.2 christos if (h != NULL)
1865 1.1.1.2 christos off = h->got.offset;
1866 1.1.1.2 christos else
1867 1.1.1.2 christos off = local_got_offsets[r_symndx];
1868 1.1.1.2 christos
1869 1.1.1.2 christos /* See above re usage of bit 0 and 1. */
1870 1.1.1.2 christos if ((off & 1) == 0)
1871 1.1.1.2 christos {
1872 1.1.1.2 christos Elf_Internal_Rela outrel;
1873 1.1.1.2 christos bfd_byte *loc;
1874 1.1.1.2 christos
1875 1.1.1.2 christos off &= ~3;
1876 1.1.1.2 christos
1877 1.1.1.3 christos if (h != NULL)
1878 1.1.1.2 christos h->got.offset |= 1;
1879 1.1.1.2 christos else
1880 1.1.1.2 christos local_got_offsets[r_symndx] |= 1;
1881 1.1.1.2 christos
1882 1.1.1.2 christos if (srelgot == NULL)
1883 1.1.1.2 christos srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1884 1.1.1.2 christos BFD_ASSERT (srelgot != NULL);
1885 1.1.1.2 christos
1886 1.1.1.2 christos if (h != NULL && h->dynindx != -1)
1887 1.1.1.2 christos {
1888 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1889 1.1.1.2 christos relocation = 0;
1890 1.1.1.2 christos }
1891 1.1.1.2 christos else
1892 1.1.1.2 christos {
1893 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1894 1.1.1.2 christos
1895 1.1.1.2 christos /* NULL if we had an error. */
1896 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1897 1.1.1.2 christos ? 0 : elf_hash_table (info)->tls_sec->vma;
1898 1.1.1.2 christos }
1899 1.1.1.2 christos
1900 1.1.1.2 christos /* Just "define" the initial contents in some
1901 1.1.1.2 christos semi-logical way. */
1902 1.1.1.2 christos bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1903 1.1.1.2 christos
1904 1.1.1.2 christos outrel.r_offset = (sgot->output_section->vma
1905 1.1.1.2 christos + sgot->output_offset
1906 1.1.1.2 christos + off);
1907 1.1.1.2 christos outrel.r_addend = relocation;
1908 1.1.1.2 christos loc = srelgot->contents;
1909 1.1.1.2 christos loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1910 1.1.1.2 christos /* NULL if we had an error. */
1911 1.1.1.2 christos if (srelgot->contents != NULL)
1912 1.1.1.2 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1913 1.1.1.2 christos }
1914 1.1.1.2 christos else
1915 1.1.1.2 christos off &= ~3;
1916 1.1.1.2 christos
1917 1.1.1.2 christos relocation = sgot->output_offset + off
1918 1.1.1.2 christos + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1919 1.1.1.2 christos }
1920 1.1.1.2 christos
1921 1.1.1.2 christos /* The GOT-relative offset to the GOT entry is the relocation,
1922 1.1.1.2 christos or for R_CRIS_32_GD, the actual address of the GOT entry. */
1923 1.1.1.4 christos break;
1924 1.1.1.2 christos
1925 1.1.1.2 christos case R_CRIS_16_TPREL:
1926 1.1.1.2 christos case R_CRIS_32_TPREL:
1927 1.1.1.2 christos /* This relocation must only be performed against symbols
1928 1.1.1.2 christos defined in an ordinary (non-DSO) object. */
1929 1.1.1.2 christos if (bfd_link_pic (info))
1930 1.1.1.2 christos {
1931 1.1.1.2 christos bfd_set_error (bfd_error_invalid_operation);
1932 1.1.1.2 christos
1933 1.1.1.2 christos /* We've already informed in cris_elf_check_relocs that
1934 1.1.1.2 christos this is an error. */
1935 1.1.1.2 christos return FALSE;
1936 1.1.1.2 christos }
1937 1.1.1.2 christos
1938 1.1.1.2 christos if (h != NULL
1939 1.1.1.2 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1940 1.1.1.2 christos && !(h->def_regular || ELF_COMMON_DEF_P (h))
1941 1.1.1.2 christos /* If it's undefined, then an error message has already
1942 1.1.1.2 christos been emitted. */
1943 1.1.1.2 christos && h->root.type != bfd_link_hash_undefined)
1944 1.1.1.2 christos {
1945 1.1.1.2 christos (*_bfd_error_handler)
1946 1.1.1.2 christos (_("%B, section %A: relocation %s is"
1947 1.1.1.2 christos " not allowed for symbol: `%s'"
1948 1.1.1.2 christos " which is defined outside the program,"
1949 1.1.1.2 christos " perhaps a declaration mixup?"),
1950 1.1.1.2 christos input_bfd,
1951 1.1.1.2 christos input_section,
1952 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1953 1.1.1.2 christos symname);
1954 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1955 1.1.1.2 christos return FALSE;
1956 1.1.1.2 christos }
1957 1.1.1.2 christos
1958 1.1.1.2 christos /* NULL if we had an error. */
1959 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1960 1.1.1.2 christos ? 0
1961 1.1.1.2 christos : (elf_hash_table (info)->tls_sec->vma
1962 1.1.1.2 christos + elf_hash_table (info)->tls_size);
1963 1.1.1.2 christos
1964 1.1 skrll /* The TLS-relative offset is the relocation. */
1965 1.1 skrll break;
1966 1.1 skrll
1967 1.1 skrll default:
1968 1.1 skrll BFD_FAIL ();
1969 1.1 skrll return FALSE;
1970 1.1 skrll }
1971 1.1 skrll
1972 1.1 skrll r = cris_final_link_relocate (howto, input_bfd, input_section,
1973 1.1 skrll contents, rel, relocation);
1974 1.1 skrll
1975 1.1 skrll if (r != bfd_reloc_ok)
1976 1.1 skrll {
1977 1.1 skrll const char * msg = (const char *) NULL;
1978 1.1 skrll
1979 1.1.1.2 christos switch (r)
1980 1.1.1.2 christos {
1981 1.1.1.2 christos case bfd_reloc_overflow:
1982 1.1.1.2 christos r = info->callbacks->reloc_overflow
1983 1.1.1.2 christos (info, (h ? &h->root : NULL), symname, howto->name,
1984 1.1.1.2 christos (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1985 1.1.1.2 christos if (additional_relocation_error_msg_count > 0)
1986 1.1.1.2 christos {
1987 1.1.1.2 christos additional_relocation_error_msg_count--;
1988 1.1.1.2 christos switch (r_type)
1989 1.1.1.2 christos {
1990 1.1.1.2 christos case R_CRIS_16_GOTPLT:
1991 1.1.1.2 christos case R_CRIS_16_GOT:
1992 1.1.1.2 christos
1993 1.1.1.2 christos /* Not just TLS is involved here, so we make
1994 1.1.1.2 christos generation and message depend on -fPIC/-fpic
1995 1.1.1.2 christos only. */
1996 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
1997 1.1.1.2 christos case R_CRIS_16_GOT_GD:
1998 1.1.1.2 christos (*_bfd_error_handler)
1999 1.1.1.2 christos (_("(too many global variables for -fpic:"
2000 1.1.1.2 christos " recompile with -fPIC)"));
2001 1.1.1.2 christos break;
2002 1.1.1.2 christos
2003 1.1.1.2 christos case R_CRIS_16_TPREL:
2004 1.1.1.2 christos case R_CRIS_16_DTPREL:
2005 1.1.1.2 christos (*_bfd_error_handler)
2006 1.1.1.2 christos (_("(thread-local data too big for -fpic or"
2007 1.1.1.2 christos " -msmall-tls: recompile with -fPIC or"
2008 1.1.1.2 christos " -mno-small-tls)"));
2009 1.1.1.2 christos break;
2010 1.1 skrll
2011 1.1 skrll /* No known cause for overflow for other relocs. */
2012 1.1 skrll default:
2013 1.1 skrll break;
2014 1.1 skrll }
2015 1.1 skrll }
2016 1.1 skrll break;
2017 1.1 skrll
2018 1.1 skrll case bfd_reloc_undefined:
2019 1.1 skrll r = info->callbacks->undefined_symbol
2020 1.1 skrll (info, symname, input_bfd, input_section, rel->r_offset,
2021 1.1 skrll TRUE);
2022 1.1 skrll break;
2023 1.1 skrll
2024 1.1 skrll case bfd_reloc_outofrange:
2025 1.1 skrll msg = _("internal error: out of range error");
2026 1.1 skrll break;
2027 1.1 skrll
2028 1.1 skrll case bfd_reloc_notsupported:
2029 1.1 skrll msg = _("internal error: unsupported relocation error");
2030 1.1 skrll break;
2031 1.1 skrll
2032 1.1 skrll case bfd_reloc_dangerous:
2033 1.1 skrll msg = _("internal error: dangerous relocation");
2034 1.1 skrll break;
2035 1.1 skrll
2036 1.1 skrll default:
2037 1.1 skrll msg = _("internal error: unknown error");
2038 1.1 skrll break;
2039 1.1 skrll }
2040 1.1 skrll
2041 1.1 skrll if (msg)
2042 1.1 skrll r = info->callbacks->warning
2043 1.1 skrll (info, msg, symname, input_bfd, input_section, rel->r_offset);
2044 1.1 skrll
2045 1.1 skrll if (! r)
2046 1.1 skrll return FALSE;
2047 1.1 skrll }
2048 1.1 skrll }
2049 1.1 skrll
2050 1.1 skrll return TRUE;
2051 1.1.1.2 christos }
2052 1.1.1.2 christos
2053 1.1.1.2 christos /* Finish up dynamic symbol handling. We set the contents of various
2055 1.1 skrll dynamic sections here. */
2056 1.1.1.2 christos
2057 1.1 skrll static bfd_boolean
2058 1.1 skrll elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2059 1.1 skrll struct bfd_link_info *info,
2060 1.1 skrll struct elf_link_hash_entry *h,
2061 1.1 skrll Elf_Internal_Sym *sym)
2062 1.1 skrll {
2063 1.1 skrll struct elf_cris_link_hash_table * htab;
2064 1.1 skrll bfd *dynobj;
2065 1.1 skrll
2066 1.1 skrll /* Where in the plt entry to put values. */
2067 1.1 skrll int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2068 1.1 skrll
2069 1.1 skrll /* What offset to add to the distance to the first PLT entry for the
2070 1.1 skrll value at plt_off3. */
2071 1.1 skrll int plt_off3_value_bias = 4;
2072 1.1 skrll
2073 1.1.1.2 christos /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2074 1.1.1.2 christos for PIC and non-PIC for v32 and pre-v32). */
2075 1.1.1.2 christos int plt_stub_offset = 8;
2076 1.1.1.2 christos int plt_entry_size = PLT_ENTRY_SIZE;
2077 1.1 skrll const bfd_byte *plt_entry = elf_cris_plt_entry;
2078 1.1 skrll const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2079 1.1 skrll
2080 1.1 skrll htab = elf_cris_hash_table (info);
2081 1.1 skrll if (htab == NULL)
2082 1.1 skrll return FALSE;
2083 1.1 skrll
2084 1.1 skrll /* Adjust the various PLT entry offsets. */
2085 1.1 skrll if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2086 1.1 skrll {
2087 1.1 skrll plt_off2 = 14;
2088 1.1 skrll plt_off3 = 20;
2089 1.1 skrll plt_off3_value_bias = -2;
2090 1.1 skrll plt_stub_offset = 12;
2091 1.1 skrll plt_entry_size = PLT_ENTRY_SIZE_V32;
2092 1.1 skrll plt_entry = elf_cris_plt_entry_v32;
2093 1.1 skrll plt_pic_entry = elf_cris_pic_plt_entry_v32;
2094 1.1 skrll }
2095 1.1 skrll
2096 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
2097 1.1 skrll
2098 1.1 skrll if (h->plt.offset != (bfd_vma) -1)
2099 1.1.1.2 christos {
2100 1.1 skrll asection *splt;
2101 1.1 skrll asection *sgotplt;
2102 1.1 skrll asection *srela;
2103 1.1 skrll bfd_vma got_base;
2104 1.1.1.2 christos
2105 1.1.1.2 christos bfd_vma gotplt_offset
2106 1.1.1.2 christos = elf_cris_hash_entry (h)->gotplt_offset;
2107 1.1.1.2 christos Elf_Internal_Rela rela;
2108 1.1.1.2 christos bfd_byte *loc;
2109 1.1.1.2 christos bfd_boolean has_gotplt = gotplt_offset != 0;
2110 1.1.1.2 christos
2111 1.1.1.2 christos /* Get the index in the .rela.plt relocations for the .got.plt
2112 1.1.1.2 christos entry that corresponds to this symbol.
2113 1.1.1.2 christos We have to count backwards here, and the result is only valid
2114 1.1.1.2 christos as an index into .rela.plt. We also have to undo the effect
2115 1.1.1.2 christos of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2116 1.1.1.2 christos .got.plt) for which gotplt_offset is adjusted, because while
2117 1.1 skrll that entry goes into .got.plt, its relocation goes into
2118 1.1 skrll .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2119 1.1 skrll processed as part of the runtime lazy .rela.plt relocation).
2120 1.1 skrll FIXME: There be literal constants here... */
2121 1.1 skrll bfd_vma rela_plt_index
2122 1.1 skrll = (htab->dtpmod_refcount != 0
2123 1.1 skrll ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2124 1.1 skrll
2125 1.1 skrll /* Get the offset into the .got table of the entry that corresponds
2126 1.1.1.2 christos to this function. Note that we embed knowledge that "incoming"
2127 1.1 skrll .got goes after .got.plt in the output without padding (pointer
2128 1.1 skrll aligned). However, that knowledge is present in several other
2129 1.1 skrll places too. */
2130 1.1 skrll bfd_vma got_offset
2131 1.1 skrll = (has_gotplt
2132 1.1 skrll ? gotplt_offset
2133 1.1.1.3 christos : h->got.offset + htab->next_gotplt_entry);
2134 1.1.1.3 christos
2135 1.1.1.3 christos /* This symbol has an entry in the procedure linkage table. Set it
2136 1.1 skrll up. */
2137 1.1 skrll
2138 1.1 skrll BFD_ASSERT (h->dynindx != -1);
2139 1.1 skrll
2140 1.1 skrll splt = bfd_get_linker_section (dynobj, ".plt");
2141 1.1 skrll sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2142 1.1.1.4 christos srela = bfd_get_linker_section (dynobj, ".rela.plt");
2143 1.1 skrll BFD_ASSERT (splt != NULL && sgotplt != NULL
2144 1.1 skrll && (! has_gotplt || srela != NULL));
2145 1.1 skrll
2146 1.1 skrll got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2147 1.1 skrll
2148 1.1 skrll /* Fill in the entry in the procedure linkage table. */
2149 1.1 skrll if (! bfd_link_pic (info))
2150 1.1 skrll {
2151 1.1 skrll memcpy (splt->contents + h->plt.offset, plt_entry,
2152 1.1 skrll plt_entry_size);
2153 1.1 skrll
2154 1.1 skrll /* We need to enter the absolute address of the GOT entry here. */
2155 1.1 skrll bfd_put_32 (output_bfd, got_base + got_offset,
2156 1.1 skrll splt->contents + h->plt.offset + plt_off1);
2157 1.1 skrll }
2158 1.1 skrll else
2159 1.1 skrll {
2160 1.1 skrll memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2161 1.1 skrll plt_entry_size);
2162 1.1 skrll bfd_put_32 (output_bfd, got_offset,
2163 1.1 skrll splt->contents + h->plt.offset + plt_off1);
2164 1.1 skrll }
2165 1.1.1.2 christos
2166 1.1 skrll /* Fill in the plt entry and make a relocation, if this is a "real"
2167 1.1 skrll PLT entry. */
2168 1.1 skrll if (has_gotplt)
2169 1.1 skrll {
2170 1.1 skrll /* Fill in the offset to the reloc table. */
2171 1.1 skrll bfd_put_32 (output_bfd,
2172 1.1 skrll rela_plt_index * sizeof (Elf32_External_Rela),
2173 1.1 skrll splt->contents + h->plt.offset + plt_off2);
2174 1.1 skrll
2175 1.1 skrll /* Fill in the offset to the first PLT entry, where to "jump". */
2176 1.1 skrll bfd_put_32 (output_bfd,
2177 1.1 skrll - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2178 1.1 skrll splt->contents + h->plt.offset + plt_off3);
2179 1.1 skrll
2180 1.1 skrll /* Fill in the entry in the global offset table with the address of
2181 1.1 skrll the relocating stub. */
2182 1.1 skrll bfd_put_32 (output_bfd,
2183 1.1 skrll (splt->output_section->vma
2184 1.1 skrll + splt->output_offset
2185 1.1 skrll + h->plt.offset
2186 1.1 skrll + plt_stub_offset),
2187 1.1 skrll sgotplt->contents + got_offset);
2188 1.1.1.2 christos
2189 1.1 skrll /* Fill in the entry in the .rela.plt section. */
2190 1.1 skrll rela.r_offset = (sgotplt->output_section->vma
2191 1.1 skrll + sgotplt->output_offset
2192 1.1 skrll + got_offset);
2193 1.1 skrll rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2194 1.1 skrll rela.r_addend = 0;
2195 1.1 skrll loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2196 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2197 1.1 skrll }
2198 1.1 skrll
2199 1.1 skrll if (!h->def_regular)
2200 1.1 skrll {
2201 1.1 skrll /* Mark the symbol as undefined, rather than as defined in
2202 1.1 skrll the .plt section. Leave the value alone. */
2203 1.1 skrll sym->st_shndx = SHN_UNDEF;
2204 1.1 skrll
2205 1.1 skrll /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2206 1.1 skrll know whether resetting the value is significant; if it really
2207 1.1 skrll is, rather than a quirk or bug in the sparc port, then I
2208 1.1 skrll believe we'd see this elsewhere. */
2209 1.1 skrll /* If the symbol is weak, we do need to clear the value.
2210 1.1 skrll Otherwise, the PLT entry would provide a definition for
2211 1.1 skrll the symbol even if the symbol wasn't defined anywhere,
2212 1.1 skrll and so the symbol would never be NULL. */
2213 1.1 skrll if (!h->ref_regular_nonweak)
2214 1.1 skrll sym->st_value = 0;
2215 1.1 skrll }
2216 1.1 skrll }
2217 1.1.1.2 christos
2218 1.1.1.4 christos /* For an ordinary program, we emit .got relocs only for symbols that
2219 1.1 skrll are in the dynamic-symbols table and are either defined by the
2220 1.1 skrll program or are undefined weak symbols, or are function symbols
2221 1.1 skrll where we do not output a PLT: the PLT reloc was output above and all
2222 1.1 skrll references to the function symbol are redirected to the PLT. */
2223 1.1 skrll if (h->got.offset != (bfd_vma) -1
2224 1.1 skrll && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2225 1.1 skrll && (bfd_link_pic (info)
2226 1.1 skrll || (h->dynindx != -1
2227 1.1 skrll && h->plt.offset == (bfd_vma) -1
2228 1.1 skrll && !h->def_regular
2229 1.1 skrll && h->root.type != bfd_link_hash_undefweak)))
2230 1.1 skrll {
2231 1.1 skrll asection *sgot;
2232 1.1.1.3 christos asection *srela;
2233 1.1.1.3 christos Elf_Internal_Rela rela;
2234 1.1 skrll bfd_byte *loc;
2235 1.1 skrll bfd_byte *where;
2236 1.1 skrll
2237 1.1 skrll /* This symbol has an entry in the global offset table. Set it up. */
2238 1.1 skrll
2239 1.1 skrll sgot = bfd_get_linker_section (dynobj, ".got");
2240 1.1 skrll srela = bfd_get_linker_section (dynobj, ".rela.got");
2241 1.1 skrll BFD_ASSERT (sgot != NULL && srela != NULL);
2242 1.1 skrll
2243 1.1 skrll rela.r_offset = (sgot->output_section->vma
2244 1.1 skrll + sgot->output_offset
2245 1.1 skrll + (h->got.offset &~ (bfd_vma) 1));
2246 1.1 skrll
2247 1.1.1.4 christos /* If this is a static link, or it is a -Bsymbolic link and the
2248 1.1.1.4 christos symbol is defined locally or was forced to be local because
2249 1.1 skrll of a version file, we just want to emit a RELATIVE reloc.
2250 1.1 skrll The entry in the global offset table will already have been
2251 1.1 skrll initialized in the relocate_section function. */
2252 1.1 skrll where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2253 1.1 skrll if (! elf_hash_table (info)->dynamic_sections_created
2254 1.1 skrll || (bfd_link_pic (info)
2255 1.1 skrll && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2256 1.1 skrll && h->def_regular))
2257 1.1 skrll {
2258 1.1 skrll rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2259 1.1 skrll rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2260 1.1 skrll }
2261 1.1 skrll else
2262 1.1 skrll {
2263 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2264 1.1 skrll rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2265 1.1 skrll rela.r_addend = 0;
2266 1.1 skrll }
2267 1.1 skrll
2268 1.1 skrll loc = srela->contents;
2269 1.1 skrll loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2270 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2271 1.1 skrll }
2272 1.1 skrll
2273 1.1 skrll if (h->needs_copy)
2274 1.1 skrll {
2275 1.1 skrll asection *s;
2276 1.1 skrll Elf_Internal_Rela rela;
2277 1.1 skrll bfd_byte *loc;
2278 1.1.1.3 christos
2279 1.1 skrll /* This symbol needs a copy reloc. Set it up. */
2280 1.1 skrll
2281 1.1 skrll BFD_ASSERT (h->dynindx != -1
2282 1.1 skrll && (h->root.type == bfd_link_hash_defined
2283 1.1 skrll || h->root.type == bfd_link_hash_defweak));
2284 1.1 skrll
2285 1.1 skrll s = bfd_get_linker_section (dynobj, ".rela.bss");
2286 1.1 skrll BFD_ASSERT (s != NULL);
2287 1.1 skrll
2288 1.1 skrll rela.r_offset = (h->root.u.def.value
2289 1.1 skrll + h->root.u.def.section->output_section->vma
2290 1.1 skrll + h->root.u.def.section->output_offset);
2291 1.1.1.4 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2292 1.1 skrll rela.r_addend = 0;
2293 1.1 skrll loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2294 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2295 1.1 skrll }
2296 1.1 skrll
2297 1.1 skrll /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2298 1.1.1.2 christos if (h == elf_hash_table (info)->hdynamic
2299 1.1.1.2 christos || h == elf_hash_table (info)->hgot)
2300 1.1.1.2 christos sym->st_shndx = SHN_ABS;
2301 1.1 skrll
2302 1.1 skrll return TRUE;
2303 1.1.1.3 christos }
2304 1.1.1.3 christos
2305 1.1 skrll /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2307 1.1 skrll offsets were changed, as part of -z combreloc handling, from those we
2308 1.1 skrll computed. */
2309 1.1 skrll
2310 1.1 skrll static bfd_boolean
2311 1.1 skrll elf_cris_finish_dynamic_sections (bfd *output_bfd,
2312 1.1.1.3 christos struct bfd_link_info *info)
2313 1.1 skrll {
2314 1.1.1.3 christos bfd *dynobj;
2315 1.1 skrll asection *sgot;
2316 1.1 skrll asection *sdyn;
2317 1.1 skrll
2318 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
2319 1.1 skrll
2320 1.1 skrll sgot = bfd_get_linker_section (dynobj, ".got.plt");
2321 1.1.1.3 christos BFD_ASSERT (sgot != NULL);
2322 1.1 skrll sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2323 1.1 skrll
2324 1.1 skrll if (elf_hash_table (info)->dynamic_sections_created)
2325 1.1 skrll {
2326 1.1 skrll asection *splt;
2327 1.1 skrll Elf32_External_Dyn *dyncon, *dynconend;
2328 1.1 skrll
2329 1.1 skrll splt = bfd_get_linker_section (dynobj, ".plt");
2330 1.1 skrll BFD_ASSERT (splt != NULL && sdyn != NULL);
2331 1.1 skrll
2332 1.1 skrll dyncon = (Elf32_External_Dyn *) sdyn->contents;
2333 1.1 skrll dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2334 1.1 skrll for (; dyncon < dynconend; dyncon++)
2335 1.1 skrll {
2336 1.1 skrll Elf_Internal_Dyn dyn;
2337 1.1 skrll asection *s;
2338 1.1 skrll
2339 1.1 skrll bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2340 1.1 skrll
2341 1.1 skrll switch (dyn.d_tag)
2342 1.1 skrll {
2343 1.1 skrll default:
2344 1.1 skrll break;
2345 1.1 skrll
2346 1.1 skrll case DT_PLTGOT:
2347 1.1 skrll s = bfd_get_section_by_name (output_bfd, ".got");
2348 1.1 skrll BFD_ASSERT (s != NULL);
2349 1.1 skrll dyn.d_un.d_ptr = s->vma;
2350 1.1 skrll bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2351 1.1 skrll break;
2352 1.1 skrll
2353 1.1 skrll case DT_JMPREL:
2354 1.1 skrll /* Yes, we *can* have a .plt and no .plt.rela, for instance
2355 1.1 skrll if all symbols are found in the .got (not .got.plt). */
2356 1.1 skrll s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2357 1.1 skrll dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2358 1.1 skrll bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2359 1.1 skrll break;
2360 1.1 skrll
2361 1.1 skrll case DT_PLTRELSZ:
2362 1.1 skrll s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2363 1.1 skrll if (s == NULL)
2364 1.1 skrll dyn.d_un.d_val = 0;
2365 1.1 skrll else
2366 1.1 skrll dyn.d_un.d_val = s->size;
2367 1.1 skrll bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2368 1.1 skrll break;
2369 1.1 skrll
2370 1.1 skrll case DT_RELASZ:
2371 1.1 skrll /* The procedure linkage table relocs (DT_JMPREL) should
2372 1.1 skrll not be included in the overall relocs (DT_RELA).
2373 1.1 skrll Therefore, we override the DT_RELASZ entry here to
2374 1.1 skrll make it not include the JMPREL relocs. Since the
2375 1.1 skrll linker script arranges for .rela.plt to follow all
2376 1.1 skrll other relocation sections, we don't have to worry
2377 1.1 skrll about changing the DT_RELA entry. */
2378 1.1 skrll s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2379 1.1 skrll if (s != NULL)
2380 1.1 skrll dyn.d_un.d_val -= s->size;
2381 1.1 skrll bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2382 1.1 skrll break;
2383 1.1.1.4 christos }
2384 1.1 skrll }
2385 1.1 skrll
2386 1.1 skrll /* Fill in the first entry in the procedure linkage table. */
2387 1.1 skrll if (splt->size > 0)
2388 1.1 skrll {
2389 1.1 skrll if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2390 1.1 skrll {
2391 1.1 skrll if (bfd_link_pic (info))
2392 1.1 skrll memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2393 1.1 skrll PLT_ENTRY_SIZE_V32);
2394 1.1 skrll else
2395 1.1 skrll {
2396 1.1 skrll memcpy (splt->contents, elf_cris_plt0_entry_v32,
2397 1.1 skrll PLT_ENTRY_SIZE_V32);
2398 1.1 skrll bfd_put_32 (output_bfd,
2399 1.1 skrll sgot->output_section->vma
2400 1.1 skrll + sgot->output_offset + 4,
2401 1.1.1.4 christos splt->contents + 4);
2402 1.1 skrll
2403 1.1 skrll elf_section_data (splt->output_section)->this_hdr.sh_entsize
2404 1.1 skrll = PLT_ENTRY_SIZE_V32;
2405 1.1 skrll }
2406 1.1 skrll }
2407 1.1 skrll else
2408 1.1 skrll {
2409 1.1 skrll if (bfd_link_pic (info))
2410 1.1 skrll memcpy (splt->contents, elf_cris_pic_plt0_entry,
2411 1.1 skrll PLT_ENTRY_SIZE);
2412 1.1 skrll else
2413 1.1 skrll {
2414 1.1 skrll memcpy (splt->contents, elf_cris_plt0_entry,
2415 1.1 skrll PLT_ENTRY_SIZE);
2416 1.1 skrll bfd_put_32 (output_bfd,
2417 1.1 skrll sgot->output_section->vma
2418 1.1 skrll + sgot->output_offset + 4,
2419 1.1 skrll splt->contents + 6);
2420 1.1 skrll bfd_put_32 (output_bfd,
2421 1.1 skrll sgot->output_section->vma
2422 1.1 skrll + sgot->output_offset + 8,
2423 1.1 skrll splt->contents + 14);
2424 1.1 skrll
2425 1.1 skrll elf_section_data (splt->output_section)->this_hdr.sh_entsize
2426 1.1 skrll = PLT_ENTRY_SIZE;
2427 1.1 skrll }
2428 1.1 skrll }
2429 1.1 skrll }
2430 1.1 skrll }
2431 1.1 skrll
2432 1.1 skrll /* Fill in the first three entries in the global offset table. */
2433 1.1 skrll if (sgot->size > 0)
2434 1.1 skrll {
2435 1.1 skrll if (sdyn == NULL)
2436 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2437 1.1 skrll else
2438 1.1 skrll bfd_put_32 (output_bfd,
2439 1.1 skrll sdyn->output_section->vma + sdyn->output_offset,
2440 1.1 skrll sgot->contents);
2441 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2442 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2443 1.1 skrll }
2444 1.1 skrll
2445 1.1 skrll elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2446 1.1 skrll
2447 1.1 skrll return TRUE;
2448 1.1 skrll }
2449 1.1 skrll
2450 1.1 skrll /* Return the section that should be marked against GC for a given
2452 1.1.1.2 christos relocation. */
2453 1.1 skrll
2454 1.1.1.2 christos static asection *
2455 1.1 skrll cris_elf_gc_mark_hook (asection *sec,
2456 1.1 skrll struct bfd_link_info *info,
2457 1.1 skrll Elf_Internal_Rela *rel,
2458 1.1 skrll struct elf_link_hash_entry *h,
2459 1.1.1.2 christos Elf_Internal_Sym *sym)
2460 1.1.1.2 christos {
2461 1.1.1.2 christos enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2462 1.1 skrll if (h != NULL)
2463 1.1 skrll switch (r_type)
2464 1.1 skrll {
2465 1.1 skrll case R_CRIS_GNU_VTINHERIT:
2466 1.1 skrll case R_CRIS_GNU_VTENTRY:
2467 1.1 skrll return NULL;
2468 1.1 skrll
2469 1.1 skrll default:
2470 1.1 skrll break;
2471 1.1 skrll }
2472 1.1 skrll
2473 1.1 skrll return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2474 1.1 skrll }
2475 1.1.1.2 christos
2476 1.1 skrll /* Update the got entry reference counts for the section being removed. */
2477 1.1 skrll
2478 1.1 skrll static bfd_boolean
2479 1.1 skrll cris_elf_gc_sweep_hook (bfd *abfd,
2480 1.1 skrll struct bfd_link_info *info,
2481 1.1 skrll asection *sec,
2482 1.1 skrll const Elf_Internal_Rela *relocs)
2483 1.1 skrll {
2484 1.1.1.4 christos struct elf_cris_link_hash_table * htab;
2485 1.1 skrll Elf_Internal_Shdr *symtab_hdr;
2486 1.1 skrll struct elf_link_hash_entry **sym_hashes;
2487 1.1 skrll bfd_signed_vma *local_got_refcounts;
2488 1.1 skrll const Elf_Internal_Rela *rel, *relend;
2489 1.1 skrll bfd *dynobj;
2490 1.1 skrll asection *sgot;
2491 1.1.1.2 christos asection *srelgot;
2492 1.1.1.2 christos
2493 1.1.1.2 christos if (bfd_link_relocatable (info))
2494 1.1.1.2 christos return TRUE;
2495 1.1 skrll
2496 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
2497 1.1 skrll if (dynobj == NULL)
2498 1.1 skrll return TRUE;
2499 1.1.1.3 christos
2500 1.1.1.3 christos htab = elf_cris_hash_table (info);
2501 1.1 skrll if (htab == NULL)
2502 1.1 skrll return FALSE;
2503 1.1 skrll
2504 1.1 skrll symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2505 1.1 skrll sym_hashes = elf_sym_hashes (abfd);
2506 1.1 skrll local_got_refcounts = elf_local_got_refcounts (abfd);
2507 1.1.1.2 christos
2508 1.1.1.2 christos sgot = bfd_get_linker_section (dynobj, ".got");
2509 1.1.1.2 christos srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2510 1.1 skrll
2511 1.1 skrll relend = relocs + sec->reloc_count;
2512 1.1 skrll for (rel = relocs; rel < relend; rel++)
2513 1.1 skrll {
2514 1.1 skrll unsigned long r_symndx;
2515 1.1 skrll struct elf_link_hash_entry *h = NULL;
2516 1.1 skrll bfd_signed_vma got_element_size = 4;
2517 1.1 skrll bfd_signed_vma *specific_refcount = NULL;
2518 1.1 skrll enum elf_cris_reloc_type r_type;
2519 1.1 skrll
2520 1.1.1.2 christos r_symndx = ELF32_R_SYM (rel->r_info);
2521 1.1.1.2 christos if (r_symndx >= symtab_hdr->sh_info)
2522 1.1.1.2 christos {
2523 1.1.1.2 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2524 1.1.1.2 christos while (h->root.type == bfd_link_hash_indirect
2525 1.1.1.2 christos || h->root.type == bfd_link_hash_warning)
2526 1.1.1.2 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
2527 1.1.1.2 christos }
2528 1.1.1.2 christos
2529 1.1.1.2 christos r_type = ELF32_R_TYPE (rel->r_info);
2530 1.1.1.2 christos switch (r_type)
2531 1.1.1.2 christos {
2532 1.1.1.2 christos case R_CRIS_32_GOT:
2533 1.1.1.2 christos case R_CRIS_16_GOT:
2534 1.1.1.2 christos case R_CRIS_16_GOTPLT:
2535 1.1.1.2 christos case R_CRIS_32_GOTPLT:
2536 1.1.1.2 christos specific_refcount = h != NULL
2537 1.1.1.2 christos ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2538 1.1.1.2 christos : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2539 1.1.1.2 christos break;
2540 1.1.1.2 christos
2541 1.1.1.2 christos case R_CRIS_32_GD:
2542 1.1.1.2 christos case R_CRIS_32_GOT_GD:
2543 1.1.1.2 christos case R_CRIS_16_GOT_GD:
2544 1.1.1.2 christos got_element_size = 8;
2545 1.1.1.2 christos specific_refcount = h != NULL
2546 1.1.1.2 christos ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2547 1.1.1.2 christos : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2548 1.1.1.2 christos break;
2549 1.1.1.2 christos
2550 1.1.1.2 christos case R_CRIS_32_IE:
2551 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
2552 1.1.1.2 christos case R_CRIS_32_GOT_TPREL:
2553 1.1.1.2 christos specific_refcount = h != NULL
2554 1.1 skrll ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2555 1.1.1.2 christos : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2556 1.1.1.2 christos break;
2557 1.1.1.2 christos
2558 1.1.1.2 christos default:
2559 1.1.1.2 christos break;
2560 1.1.1.2 christos }
2561 1.1 skrll
2562 1.1 skrll switch (r_type)
2563 1.1 skrll {
2564 1.1 skrll case R_CRIS_32_IE:
2565 1.1.1.2 christos case R_CRIS_32_GD:
2566 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
2567 1.1.1.2 christos case R_CRIS_32_GOT_TPREL:
2568 1.1.1.2 christos case R_CRIS_32_GOT_GD:
2569 1.1.1.2 christos case R_CRIS_16_GOT_GD:
2570 1.1.1.2 christos case R_CRIS_16_GOT:
2571 1.1.1.2 christos case R_CRIS_32_GOT:
2572 1.1.1.2 christos if (h != NULL)
2573 1.1 skrll {
2574 1.1.1.2 christos /* If the counters are 0 when we got here, we've
2575 1.1.1.2 christos miscounted somehow somewhere, an internal error. */
2576 1.1.1.2 christos BFD_ASSERT (h->got.refcount > 0);
2577 1.1 skrll --h->got.refcount;
2578 1.1 skrll
2579 1.1 skrll BFD_ASSERT (*specific_refcount > 0);
2580 1.1 skrll --*specific_refcount;
2581 1.1 skrll if (*specific_refcount == 0)
2582 1.1 skrll {
2583 1.1 skrll /* We don't need the .got entry any more. */
2584 1.1.1.2 christos sgot->size -= got_element_size;
2585 1.1.1.2 christos srelgot->size -= sizeof (Elf32_External_Rela);
2586 1.1.1.2 christos }
2587 1.1.1.2 christos break;
2588 1.1.1.2 christos }
2589 1.1.1.2 christos
2590 1.1.1.2 christos local_got_reloc:
2591 1.1.1.2 christos if (local_got_refcounts != NULL)
2592 1.1 skrll {
2593 1.1.1.2 christos /* If the counters are 0 when we got here, we've
2594 1.1.1.2 christos miscounted somehow somewhere, an internal error. */
2595 1.1.1.4 christos BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2596 1.1.1.2 christos --local_got_refcounts[r_symndx];
2597 1.1 skrll
2598 1.1 skrll BFD_ASSERT (*specific_refcount > 0);
2599 1.1 skrll --*specific_refcount;
2600 1.1 skrll if (*specific_refcount == 0)
2601 1.1 skrll {
2602 1.1 skrll /* We don't need the .got entry any more. */
2603 1.1 skrll sgot->size -= got_element_size;
2604 1.1 skrll if (bfd_link_pic (info))
2605 1.1 skrll srelgot->size -= sizeof (Elf32_External_Rela);
2606 1.1.1.3 christos }
2607 1.1.1.3 christos }
2608 1.1.1.3 christos break;
2609 1.1 skrll
2610 1.1 skrll case R_CRIS_16_GOTPLT:
2611 1.1 skrll case R_CRIS_32_GOTPLT:
2612 1.1 skrll /* For local symbols, treat these like GOT relocs. */
2613 1.1 skrll if (h == NULL)
2614 1.1 skrll goto local_got_reloc;
2615 1.1 skrll else
2616 1.1 skrll /* For global symbols, adjust the reloc-specific refcount. */
2617 1.1.1.3 christos elf_cris_hash_entry (h)->gotplt_refcount--;
2618 1.1.1.3 christos /* Fall through. */
2619 1.1.1.3 christos
2620 1.1 skrll case R_CRIS_32_PLT_GOTREL:
2621 1.1 skrll /* FIXME: We don't garbage-collect away the .got section. */
2622 1.1 skrll if (local_got_refcounts != NULL)
2623 1.1 skrll local_got_refcounts[-1]--;
2624 1.1.1.3 christos /* Fall through. */
2625 1.1 skrll
2626 1.1 skrll case R_CRIS_8:
2627 1.1 skrll case R_CRIS_16:
2628 1.1 skrll case R_CRIS_32:
2629 1.1 skrll case R_CRIS_8_PCREL:
2630 1.1 skrll case R_CRIS_16_PCREL:
2631 1.1 skrll case R_CRIS_32_PCREL:
2632 1.1 skrll case R_CRIS_32_PLT_PCREL:
2633 1.1.1.2 christos /* Negate the increment we did in cris_elf_check_relocs. */
2634 1.1.1.2 christos if (h != NULL)
2635 1.1.1.2 christos {
2636 1.1.1.2 christos if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2637 1.1.1.2 christos && h->plt.refcount > 0)
2638 1.1.1.2 christos --h->plt.refcount;
2639 1.1.1.2 christos }
2640 1.1.1.2 christos break;
2641 1.1.1.2 christos
2642 1.1.1.2 christos case R_CRIS_32_DTPREL:
2643 1.1.1.2 christos /* This'd be a .dtpreld entry in e.g. debug info. */
2644 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
2645 1.1.1.2 christos break;
2646 1.1 skrll /* Fall through. */
2647 1.1 skrll case R_CRIS_16_DTPREL:
2648 1.1 skrll htab->dtpmod_refcount--;
2649 1.1 skrll if (htab->dtpmod_refcount == 0)
2650 1.1 skrll htab->next_gotplt_entry -= 8;
2651 1.1 skrll BFD_ASSERT (local_got_refcounts != NULL);
2652 1.1 skrll local_got_refcounts[-1]--;
2653 1.1 skrll break;
2654 1.1.1.2 christos
2655 1.1.1.2 christos default:
2656 1.1.1.2 christos break;
2657 1.1.1.3 christos }
2658 1.1.1.3 christos }
2659 1.1.1.2 christos
2660 1.1.1.2 christos return TRUE;
2661 1.1.1.3 christos }
2662 1.1.1.3 christos
2663 1.1.1.3 christos /* The elf_backend_plt_sym_val hook function. */
2664 1.1.1.3 christos
2665 1.1.1.3 christos static bfd_vma
2666 1.1.1.3 christos cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2667 1.1.1.3 christos const arelent *rel)
2668 1.1.1.3 christos {
2669 1.1.1.3 christos bfd_size_type plt_entry_size;
2670 1.1.1.3 christos bfd_size_type pltoffs;
2671 1.1.1.3 christos bfd *abfd = plt->owner;
2672 1.1.1.3 christos
2673 1.1.1.3 christos /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2674 1.1.1.2 christos bfd_size_type plt_entry_got_offset = 2;
2675 1.1.1.3 christos bfd_size_type plt_sec_size;
2676 1.1.1.2 christos bfd_size_type got_vma_for_dyn;
2677 1.1.1.3 christos asection *got;
2678 1.1.1.2 christos
2679 1.1.1.2 christos /* FIXME: the .got section should be readily available also when
2680 1.1.1.3 christos we're not linking. */
2681 1.1.1.3 christos if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2682 1.1.1.3 christos return (bfd_vma) -1;
2683 1.1.1.3 christos
2684 1.1.1.3 christos plt_sec_size = bfd_section_size (plt->owner, plt);
2685 1.1.1.3 christos plt_entry_size
2686 1.1.1.3 christos = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2687 1.1.1.3 christos ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2688 1.1.1.3 christos
2689 1.1.1.3 christos /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2690 1.1.1.3 christos got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2691 1.1.1.3 christos
2692 1.1.1.3 christos /* Because we can have merged GOT entries; a single .got entry for
2693 1.1.1.3 christos both GOT and the PLT part of the GOT (.got.plt), the index of the
2694 1.1.1.3 christos reloc in .rela.plt is not the same as the index in the PLT.
2695 1.1.1.3 christos Instead, we have to hunt down the GOT offset in the PLT that
2696 1.1.1.3 christos corresponds to that of this reloc. Unfortunately, we will only
2697 1.1.1.3 christos be called for the .rela.plt relocs, so we'll miss synthetic
2698 1.1.1.3 christos symbols for .plt entries with merged GOT entries. (FIXME:
2699 1.1.1.3 christos fixable by providing our own bfd_elf32_get_synthetic_symtab.
2700 1.1.1.3 christos Doesn't seem worthwile at time of this writing.) FIXME: we've
2701 1.1.1.4 christos gone from O(1) to O(N) (N number of PLT entries) for finding each
2702 1.1.1.3 christos PLT address. Shouldn't matter in practice though. */
2703 1.1.1.3 christos
2704 1.1.1.3 christos for (pltoffs = plt_entry_size;
2705 1.1.1.3 christos pltoffs < plt_sec_size;
2706 1.1.1.3 christos pltoffs += plt_entry_size)
2707 1.1.1.3 christos {
2708 1.1.1.3 christos bfd_size_type got_offset;
2709 1.1.1.3 christos bfd_byte gotoffs_raw[4];
2710 1.1.1.3 christos
2711 1.1.1.3 christos if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2712 1.1.1.3 christos pltoffs + plt_entry_got_offset,
2713 1.1.1.3 christos sizeof (gotoffs_raw)))
2714 1.1.1.3 christos return (bfd_vma) -1;
2715 1.1.1.2 christos
2716 1.1.1.2 christos got_offset = bfd_get_32 (abfd, gotoffs_raw);
2717 1.1 skrll if (got_offset + got_vma_for_dyn == rel->address)
2718 1.1 skrll return plt->vma + pltoffs;
2719 1.1 skrll }
2720 1.1 skrll
2721 1.1 skrll /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2722 1.1 skrll that'd not be graceful behavior for invalid input. */
2723 1.1 skrll return (bfd_vma) -1;
2724 1.1 skrll }
2725 1.1.1.3 christos
2726 1.1 skrll /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2727 1.1 skrll entry but we found we will not create any. Called when we find we will
2728 1.1 skrll not have any PLT for this symbol, by for example
2729 1.1.1.3 christos elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2730 1.1.1.3 christos or elf_cris_size_dynamic_sections if no dynamic sections will be
2731 1.1.1.3 christos created (we're only linking static objects). */
2732 1.1.1.3 christos
2733 1.1 skrll static bfd_boolean
2734 1.1 skrll elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2735 1.1 skrll {
2736 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) p;
2737 1.1 skrll
2738 1.1.1.2 christos /* A GOTPLT reloc, when activated, is supposed to be included into
2739 1.1 skrll the PLT refcount. */
2740 1.1.1.2 christos BFD_ASSERT (h->gotplt_refcount == 0
2741 1.1.1.2 christos || h->gotplt_refcount <= h->root.plt.refcount);
2742 1.1 skrll
2743 1.1 skrll /* If nobody wanted a GOTPLT with this symbol, we're done. */
2744 1.1.1.2 christos if (h->gotplt_refcount <= 0)
2745 1.1 skrll return TRUE;
2746 1.1 skrll
2747 1.1 skrll if (h->reg_got_refcount > 0)
2748 1.1 skrll {
2749 1.1 skrll /* There's a GOT entry for this symbol. Just adjust the refcounts.
2750 1.1 skrll Probably not necessary at this stage, but keeping them accurate
2751 1.1 skrll helps avoiding surprises later. */
2752 1.1 skrll h->root.got.refcount += h->gotplt_refcount;
2753 1.1 skrll h->reg_got_refcount += h->gotplt_refcount;
2754 1.1 skrll h->gotplt_refcount = 0;
2755 1.1.1.3 christos }
2756 1.1.1.3 christos else
2757 1.1 skrll {
2758 1.1.1.2 christos /* No GOT entry for this symbol. We need to create one. */
2759 1.1.1.2 christos bfd *dynobj = elf_hash_table (info)->dynobj;
2760 1.1.1.2 christos asection *sgot;
2761 1.1 skrll asection *srelgot;
2762 1.1 skrll
2763 1.1 skrll BFD_ASSERT (dynobj != NULL);
2764 1.1 skrll sgot = bfd_get_linker_section (dynobj, ".got");
2765 1.1 skrll srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2766 1.1 skrll
2767 1.1 skrll /* Put accurate refcounts there. */
2768 1.1 skrll h->root.got.refcount += h->gotplt_refcount;
2769 1.1 skrll h->reg_got_refcount = h->gotplt_refcount;
2770 1.1 skrll
2771 1.1 skrll h->gotplt_refcount = 0;
2772 1.1 skrll
2773 1.1 skrll /* We always have a .got and a .rela.got section if there were
2774 1.1 skrll GOTPLT relocs in input. */
2775 1.1 skrll BFD_ASSERT (sgot != NULL && srelgot != NULL);
2776 1.1 skrll
2777 1.1 skrll /* Allocate space in the .got section. */
2778 1.1 skrll sgot->size += 4;
2779 1.1 skrll
2780 1.1 skrll /* Allocate relocation space. */
2781 1.1 skrll srelgot->size += sizeof (Elf32_External_Rela);
2782 1.1 skrll }
2783 1.1 skrll
2784 1.1 skrll return TRUE;
2785 1.1 skrll }
2786 1.1 skrll
2787 1.1 skrll /* Try to fold PLT entries with GOT entries. There are two cases when we
2788 1.1 skrll want to do this:
2789 1.1 skrll
2790 1.1 skrll - When all PLT references are GOTPLT references, and there are GOT
2791 1.1 skrll references, and this is not the executable. We don't have to
2792 1.1 skrll generate a PLT at all.
2793 1.1 skrll
2794 1.1 skrll - When there are both (ordinary) PLT references and GOT references,
2795 1.1 skrll and this isn't the executable.
2796 1.1 skrll We want to make the PLT reference use the ordinary GOT entry rather
2797 1.1 skrll than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2798 1.1 skrll since the GOT entry will have to be resolved at startup anyway.
2799 1.1 skrll
2800 1.1 skrll Though the latter case is handled when room for the PLT is allocated,
2801 1.1 skrll not here.
2802 1.1 skrll
2803 1.1.1.3 christos By folding into the GOT, we may need a round-trip to a PLT in the
2804 1.1 skrll executable for calls, a loss in performance. Still, losing a
2805 1.1 skrll reloc is a win in size and at least in start-up time.
2806 1.1 skrll
2807 1.1 skrll Note that this function is called before symbols are forced local by
2808 1.1 skrll version scripts. The differing cases are handled by
2809 1.1 skrll elf_cris_hide_symbol. */
2810 1.1 skrll
2811 1.1 skrll static bfd_boolean
2812 1.1 skrll elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2813 1.1 skrll {
2814 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) p;
2815 1.1 skrll
2816 1.1 skrll /* If there are no GOT references for this symbol, we can't fold any
2817 1.1 skrll other reference so there's nothing to do. Likewise if there are no
2818 1.1 skrll PLT references; GOTPLT references included. */
2819 1.1 skrll if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2820 1.1 skrll return TRUE;
2821 1.1 skrll
2822 1.1 skrll /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2823 1.1 skrll BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2824 1.1 skrll
2825 1.1 skrll if (h->gotplt_refcount == h->root.plt.refcount)
2826 1.1 skrll {
2827 1.1 skrll /* The only PLT references are GOTPLT references, and there are GOT
2828 1.1 skrll references. Convert PLT to GOT references. */
2829 1.1 skrll if (! elf_cris_adjust_gotplt_to_got (h, info))
2830 1.1 skrll return FALSE;
2831 1.1 skrll
2832 1.1 skrll /* Clear the PLT references, so no PLT will be created. */
2833 1.1 skrll h->root.plt.offset = (bfd_vma) -1;
2834 1.1 skrll }
2835 1.1.1.3 christos
2836 1.1.1.3 christos return TRUE;
2837 1.1.1.3 christos }
2838 1.1 skrll
2839 1.1 skrll /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2840 1.1 skrll to use a GOT entry (and create one) rather than requiring a GOTPLT
2841 1.1 skrll entry. */
2842 1.1 skrll
2843 1.1 skrll static void
2844 1.1 skrll elf_cris_hide_symbol (struct bfd_link_info *info,
2845 1.1 skrll struct elf_link_hash_entry *h,
2846 1.1 skrll bfd_boolean force_local)
2847 1.1 skrll {
2848 1.1 skrll elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2849 1.1 skrll
2850 1.1 skrll _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2851 1.1.1.2 christos }
2852 1.1.1.2 christos
2853 1.1 skrll /* Adjust a symbol defined by a dynamic object and referenced by a
2854 1.1.1.2 christos regular object. The current definition is in some section of the
2855 1.1 skrll dynamic object, but we're not including those sections. We have to
2856 1.1 skrll change the definition to something the rest of the link can
2857 1.1 skrll understand. */
2858 1.1 skrll
2859 1.1.1.2 christos static bfd_boolean
2860 1.1.1.2 christos elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2861 1.1.1.2 christos struct elf_link_hash_entry *h)
2862 1.1.1.2 christos {
2863 1.1 skrll struct elf_cris_link_hash_table * htab;
2864 1.1 skrll bfd *dynobj;
2865 1.1 skrll asection *s;
2866 1.1 skrll bfd_size_type plt_entry_size;
2867 1.1 skrll
2868 1.1 skrll htab = elf_cris_hash_table (info);
2869 1.1 skrll if (htab == NULL)
2870 1.1 skrll return FALSE;
2871 1.1 skrll
2872 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
2873 1.1 skrll
2874 1.1 skrll /* Make sure we know what is going on here. */
2875 1.1 skrll BFD_ASSERT (dynobj != NULL
2876 1.1 skrll && (h->needs_plt
2877 1.1 skrll || h->u.weakdef != NULL
2878 1.1 skrll || (h->def_dynamic
2879 1.1 skrll && h->ref_regular
2880 1.1 skrll && !h->def_regular)));
2881 1.1 skrll
2882 1.1 skrll plt_entry_size
2883 1.1 skrll = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2884 1.1 skrll ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2885 1.1 skrll
2886 1.1 skrll /* If this is a function, put it in the procedure linkage table. We
2887 1.1 skrll will fill in the contents of the procedure linkage table later,
2888 1.1 skrll when we know the address of the .got section. */
2889 1.1.1.4 christos if (h->type == STT_FUNC
2890 1.1 skrll || h->needs_plt)
2891 1.1 skrll {
2892 1.1 skrll /* If we link a program (not a DSO), we'll get rid of unnecessary
2893 1.1 skrll PLT entries; we point to the actual symbols -- even for pic
2894 1.1 skrll relocs, because a program built with -fpic should have the same
2895 1.1 skrll result as one built without -fpic, specifically considering weak
2896 1.1 skrll symbols.
2897 1.1 skrll FIXME: m68k and i386 differ here, for unclear reasons. */
2898 1.1 skrll if (! bfd_link_pic (info)
2899 1.1 skrll && !h->def_dynamic)
2900 1.1 skrll {
2901 1.1 skrll /* This case can occur if we saw a PLT reloc in an input file,
2902 1.1 skrll but the symbol was not defined by a dynamic object. In such
2903 1.1 skrll a case, we don't actually need to build a procedure linkage
2904 1.1 skrll table, and we can just do an absolute or PC reloc instead, or
2905 1.1 skrll change a .got.plt index to a .got index for GOTPLT relocs. */
2906 1.1 skrll BFD_ASSERT (h->needs_plt);
2907 1.1 skrll h->needs_plt = 0;
2908 1.1 skrll h->plt.offset = (bfd_vma) -1;
2909 1.1 skrll return
2910 1.1 skrll elf_cris_adjust_gotplt_to_got ((struct
2911 1.1.1.4 christos elf_cris_link_hash_entry *) h,
2912 1.1 skrll info);
2913 1.1 skrll }
2914 1.1 skrll
2915 1.1 skrll /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2916 1.1 skrll where a pointer-equivalent symbol was unimportant (i.e. more
2917 1.1 skrll like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2918 1.1 skrll of the PLT. We can't for the executable, because the GOT
2919 1.1 skrll entries will point to the PLT there (and be constant). */
2920 1.1 skrll if (bfd_link_pic (info)
2921 1.1 skrll && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2922 1.1 skrll h, info))
2923 1.1 skrll return FALSE;
2924 1.1 skrll
2925 1.1 skrll /* GC or folding may have rendered this entry unused. */
2926 1.1 skrll if (h->plt.refcount <= 0)
2927 1.1 skrll {
2928 1.1 skrll h->needs_plt = 0;
2929 1.1 skrll h->plt.offset = (bfd_vma) -1;
2930 1.1 skrll return TRUE;
2931 1.1.1.3 christos }
2932 1.1 skrll
2933 1.1 skrll /* Make sure this symbol is output as a dynamic symbol. */
2934 1.1 skrll if (h->dynindx == -1)
2935 1.1 skrll {
2936 1.1 skrll if (! bfd_elf_link_record_dynamic_symbol (info, h))
2937 1.1 skrll return FALSE;
2938 1.1 skrll }
2939 1.1 skrll
2940 1.1 skrll s = bfd_get_linker_section (dynobj, ".plt");
2941 1.1 skrll BFD_ASSERT (s != NULL);
2942 1.1.1.4 christos
2943 1.1 skrll /* If this is the first .plt entry, make room for the special
2944 1.1 skrll first entry. */
2945 1.1 skrll if (s->size == 0)
2946 1.1 skrll s->size += plt_entry_size;
2947 1.1 skrll
2948 1.1 skrll /* If this symbol is not defined in a regular file, and we are
2949 1.1 skrll not generating a shared library, then set the symbol to this
2950 1.1 skrll location in the .plt. */
2951 1.1 skrll if (!bfd_link_pic (info)
2952 1.1 skrll && !h->def_regular)
2953 1.1 skrll {
2954 1.1 skrll h->root.u.def.section = s;
2955 1.1.1.4 christos h->root.u.def.value = s->size;
2956 1.1 skrll }
2957 1.1 skrll
2958 1.1 skrll /* If there's already a GOT entry, use that, not a .got.plt. A
2959 1.1 skrll GOT field still has a reference count when we get here; it's
2960 1.1 skrll not yet changed to an offset. We can't do this for an
2961 1.1 skrll executable, because then the reloc associated with the PLT
2962 1.1 skrll would get a non-PLT reloc pointing to the PLT. FIXME: Move
2963 1.1 skrll this to elf_cris_try_fold_plt_to_got. */
2964 1.1 skrll if (bfd_link_pic (info) && h->got.refcount > 0)
2965 1.1 skrll {
2966 1.1 skrll h->got.refcount += h->plt.refcount;
2967 1.1 skrll
2968 1.1 skrll /* Mark the PLT offset to use the GOT entry by setting the low
2969 1.1 skrll bit in the plt offset; it is always a multiple of
2970 1.1 skrll plt_entry_size (which is at least a multiple of 2). */
2971 1.1 skrll BFD_ASSERT ((s->size % plt_entry_size) == 0);
2972 1.1 skrll
2973 1.1 skrll /* Change the PLT refcount to an offset. */
2974 1.1 skrll h->plt.offset = s->size;
2975 1.1 skrll
2976 1.1 skrll /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2977 1.1 skrll that the got entry should be used instead. */
2978 1.1 skrll BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2979 1.1 skrll h)->gotplt_offset == 0);
2980 1.1 skrll
2981 1.1 skrll /* Make room for this entry. */
2982 1.1 skrll s->size += plt_entry_size;
2983 1.1 skrll
2984 1.1 skrll return TRUE;
2985 1.1 skrll }
2986 1.1 skrll
2987 1.1.1.2 christos /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2988 1.1.1.2 christos h->plt.offset = s->size;
2989 1.1 skrll
2990 1.1.1.3 christos /* Make room for this entry. */
2991 1.1 skrll s->size += plt_entry_size;
2992 1.1 skrll
2993 1.1 skrll /* We also need to make an entry in the .got.plt section, which
2994 1.1 skrll will be placed in the .got section by the linker script. */
2995 1.1 skrll ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2996 1.1.1.3 christos = htab->next_gotplt_entry;
2997 1.1 skrll htab->next_gotplt_entry += 4;
2998 1.1 skrll
2999 1.1 skrll s = bfd_get_linker_section (dynobj, ".got.plt");
3000 1.1 skrll BFD_ASSERT (s != NULL);
3001 1.1 skrll s->size += 4;
3002 1.1 skrll
3003 1.1 skrll /* We also need to make an entry in the .rela.plt section. */
3004 1.1 skrll
3005 1.1 skrll s = bfd_get_linker_section (dynobj, ".rela.plt");
3006 1.1 skrll BFD_ASSERT (s != NULL);
3007 1.1 skrll s->size += sizeof (Elf32_External_Rela);
3008 1.1 skrll
3009 1.1 skrll return TRUE;
3010 1.1 skrll }
3011 1.1 skrll
3012 1.1 skrll /* Reinitialize the plt offset now that it is not used as a reference
3013 1.1 skrll count any more. */
3014 1.1 skrll h->plt.offset = (bfd_vma) -1;
3015 1.1 skrll
3016 1.1 skrll /* If this is a weak symbol, and there is a real definition, the
3017 1.1 skrll processor independent code will have arranged for us to see the
3018 1.1 skrll real definition first, and we can just use the same value. */
3019 1.1 skrll if (h->u.weakdef != NULL)
3020 1.1 skrll {
3021 1.1 skrll BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3022 1.1 skrll || h->u.weakdef->root.type == bfd_link_hash_defweak);
3023 1.1 skrll h->root.u.def.section = h->u.weakdef->root.u.def.section;
3024 1.1 skrll h->root.u.def.value = h->u.weakdef->root.u.def.value;
3025 1.1 skrll return TRUE;
3026 1.1.1.4 christos }
3027 1.1 skrll
3028 1.1 skrll /* This is a reference to a symbol defined by a dynamic object which
3029 1.1 skrll is not a function. */
3030 1.1 skrll
3031 1.1 skrll /* If we are creating a shared library, we must presume that the
3032 1.1 skrll only references to the symbol are via the global offset table.
3033 1.1 skrll For such cases we need not do anything here; the relocations will
3034 1.1 skrll be handled correctly by relocate_section. */
3035 1.1 skrll if (bfd_link_pic (info))
3036 1.1 skrll return TRUE;
3037 1.1 skrll
3038 1.1 skrll /* If there are no references to this symbol that do not use the
3039 1.1 skrll GOT, we don't need to generate a copy reloc. */
3040 1.1 skrll if (!h->non_got_ref)
3041 1.1 skrll return TRUE;
3042 1.1 skrll
3043 1.1 skrll /* We must allocate the symbol in our .dynbss section, which will
3044 1.1.1.3 christos become part of the .bss section of the executable. There will be
3045 1.1 skrll an entry for this symbol in the .dynsym section. The dynamic
3046 1.1 skrll object will contain position independent code, so all references
3047 1.1 skrll from the dynamic object to this symbol will go through the global
3048 1.1 skrll offset table. The dynamic linker will use the .dynsym entry to
3049 1.1 skrll determine the address it must put in the global offset table, so
3050 1.1 skrll both the dynamic object and the regular object will refer to the
3051 1.1.1.3 christos same memory location for the variable. */
3052 1.1 skrll
3053 1.1 skrll s = bfd_get_linker_section (dynobj, ".dynbss");
3054 1.1 skrll BFD_ASSERT (s != NULL);
3055 1.1.1.3 christos
3056 1.1 skrll /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3057 1.1 skrll copy the initial value out of the dynamic object and into the
3058 1.1 skrll runtime process image. We need to remember the offset into the
3059 1.1 skrll .rela.bss section we are going to use. */
3060 1.1 skrll if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3061 1.1.1.4 christos {
3062 1.1 skrll asection *srel;
3063 1.1 skrll
3064 1.1.1.2 christos srel = bfd_get_linker_section (dynobj, ".rela.bss");
3065 1.1.1.2 christos BFD_ASSERT (srel != NULL);
3066 1.1.1.2 christos srel->size += sizeof (Elf32_External_Rela);
3067 1.1.1.2 christos h->needs_copy = 1;
3068 1.1.1.2 christos }
3069 1.1.1.2 christos
3070 1.1.1.2 christos return _bfd_elf_adjust_dynamic_copy (info, h, s);
3071 1.1.1.2 christos }
3072 1.1.1.2 christos
3073 1.1.1.2 christos /* Adjust our "subclass" elements for an indirect symbol. */
3074 1.1.1.2 christos
3075 1.1.1.2 christos static void
3076 1.1.1.2 christos elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3077 1.1.1.2 christos struct elf_link_hash_entry *dir,
3078 1.1.1.2 christos struct elf_link_hash_entry *ind)
3079 1.1.1.2 christos {
3080 1.1.1.2 christos struct elf_cris_link_hash_entry *edir, *eind;
3081 1.1.1.2 christos
3082 1.1.1.2 christos edir = (struct elf_cris_link_hash_entry *) dir;
3083 1.1.1.2 christos eind = (struct elf_cris_link_hash_entry *) ind;
3084 1.1.1.2 christos
3085 1.1.1.2 christos /* Only indirect symbols are replaced; we're not interested in
3086 1.1.1.2 christos updating any of EIND's fields for other symbols. */
3087 1.1.1.2 christos if (eind->root.root.type != bfd_link_hash_indirect)
3088 1.1.1.2 christos {
3089 1.1.1.2 christos /* Still, we need to copy flags for e.g. weak definitions. */
3090 1.1.1.2 christos _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3091 1.1.1.2 christos return;
3092 1.1.1.2 christos }
3093 1.1.1.2 christos
3094 1.1.1.2 christos BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3095 1.1.1.2 christos
3096 1.1.1.2 christos #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3097 1.1.1.2 christos #define XMOVE(F) XMOVOPZ (F, +=, 0)
3098 1.1.1.2 christos if (eind->pcrel_relocs_copied != NULL)
3099 1.1.1.2 christos {
3100 1.1.1.2 christos if (edir->pcrel_relocs_copied != NULL)
3101 1.1.1.2 christos {
3102 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied **pp;
3103 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *p;
3104 1.1.1.2 christos
3105 1.1.1.2 christos /* Add reloc counts against the indirect sym to the direct sym
3106 1.1.1.2 christos list. Merge any entries against the same section. */
3107 1.1.1.2 christos for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3108 1.1.1.2 christos {
3109 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *q;
3110 1.1.1.2 christos p = *pp;
3111 1.1.1.2 christos for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3112 1.1.1.2 christos if (q->section == p->section)
3113 1.1.1.2 christos {
3114 1.1.1.2 christos q->count += p->count;
3115 1.1.1.2 christos *pp = p->next;
3116 1.1.1.2 christos break;
3117 1.1.1.2 christos }
3118 1.1.1.2 christos if (q == NULL)
3119 1.1.1.2 christos pp = &p->next;
3120 1.1.1.2 christos }
3121 1.1.1.2 christos *pp = edir->pcrel_relocs_copied;
3122 1.1.1.2 christos }
3123 1.1.1.2 christos XMOVOPZ (pcrel_relocs_copied, =, NULL);
3124 1.1.1.2 christos }
3125 1.1.1.2 christos XMOVE (gotplt_refcount);
3126 1.1.1.2 christos XMOVE (gotplt_offset);
3127 1.1 skrll XMOVE (reg_got_refcount);
3128 1.1 skrll XMOVE (tprel_refcount);
3129 1.1 skrll XMOVE (dtp_refcount);
3130 1.1.1.2 christos #undef XMOVE
3131 1.1.1.2 christos #undef XMOVOPZ
3132 1.1.1.2 christos
3133 1.1.1.2 christos _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3134 1.1 skrll }
3135 1.1.1.2 christos
3136 1.1 skrll /* Look through the relocs for a section during the first phase. */
3137 1.1 skrll
3138 1.1 skrll static bfd_boolean
3139 1.1 skrll cris_elf_check_relocs (bfd *abfd,
3140 1.1 skrll struct bfd_link_info *info,
3141 1.1 skrll asection *sec,
3142 1.1 skrll const Elf_Internal_Rela *relocs)
3143 1.1 skrll {
3144 1.1 skrll struct elf_cris_link_hash_table * htab;
3145 1.1 skrll bfd *dynobj;
3146 1.1.1.4 christos Elf_Internal_Shdr *symtab_hdr;
3147 1.1 skrll struct elf_link_hash_entry **sym_hashes;
3148 1.1 skrll bfd_signed_vma *local_got_refcounts;
3149 1.1.1.2 christos const Elf_Internal_Rela *rel;
3150 1.1.1.2 christos const Elf_Internal_Rela *rel_end;
3151 1.1.1.2 christos asection *sgot;
3152 1.1.1.2 christos asection *srelgot;
3153 1.1 skrll asection *sreloc;
3154 1.1 skrll
3155 1.1 skrll if (bfd_link_relocatable (info))
3156 1.1 skrll return TRUE;
3157 1.1 skrll
3158 1.1 skrll htab = elf_cris_hash_table (info);
3159 1.1 skrll if (htab == NULL)
3160 1.1 skrll return FALSE;
3161 1.1 skrll
3162 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
3163 1.1 skrll symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3164 1.1 skrll sym_hashes = elf_sym_hashes (abfd);
3165 1.1 skrll local_got_refcounts = elf_local_got_refcounts (abfd);
3166 1.1 skrll
3167 1.1 skrll sgot = NULL;
3168 1.1.1.2 christos srelgot = NULL;
3169 1.1.1.2 christos sreloc = NULL;
3170 1.1 skrll
3171 1.1 skrll rel_end = relocs + sec->reloc_count;
3172 1.1 skrll for (rel = relocs; rel < rel_end; rel++)
3173 1.1.1.2 christos {
3174 1.1.1.2 christos struct elf_link_hash_entry *h;
3175 1.1.1.2 christos unsigned long r_symndx;
3176 1.1.1.2 christos enum elf_cris_reloc_type r_type;
3177 1.1 skrll bfd_signed_vma got_element_size = 4;
3178 1.1 skrll unsigned long r_symndx_lgot = INT_MAX;
3179 1.1 skrll
3180 1.1 skrll r_symndx = ELF32_R_SYM (rel->r_info);
3181 1.1 skrll if (r_symndx < symtab_hdr->sh_info)
3182 1.1 skrll {
3183 1.1.1.4 christos h = NULL;
3184 1.1.1.4 christos r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3185 1.1.1.4 christos }
3186 1.1.1.4 christos else
3187 1.1 skrll {
3188 1.1 skrll h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3189 1.1 skrll while (h->root.type == bfd_link_hash_indirect
3190 1.1 skrll || h->root.type == bfd_link_hash_warning)
3191 1.1 skrll h = (struct elf_link_hash_entry *) h->root.u.i.link;
3192 1.1 skrll
3193 1.1 skrll /* PR15323, ref flags aren't set for references in the same
3194 1.1 skrll object. */
3195 1.1.1.2 christos h->root.non_ir_ref = 1;
3196 1.1.1.2 christos }
3197 1.1.1.2 christos
3198 1.1.1.2 christos r_type = ELF32_R_TYPE (rel->r_info);
3199 1.1.1.2 christos
3200 1.1.1.2 christos /* Some relocs require linker-created sections; we need to hang them
3201 1.1.1.2 christos on the first input bfd we found that contained dynamic relocs. */
3202 1.1.1.2 christos switch (r_type)
3203 1.1.1.2 christos {
3204 1.1.1.2 christos case R_CRIS_32_DTPREL:
3205 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
3206 1.1.1.2 christos /* This'd be a .dtpreld entry in e.g. debug info. We have
3207 1.1.1.2 christos several different switch statements below, but none of
3208 1.1.1.2 christos that is needed; we need no preparations for resolving
3209 1.1.1.2 christos R_CRIS_32_DTPREL into a non-allocated section (debug
3210 1.1.1.2 christos info), so let's just move on to the next
3211 1.1.1.2 christos relocation. */
3212 1.1.1.2 christos continue;
3213 1.1.1.2 christos /* Fall through. */
3214 1.1.1.2 christos case R_CRIS_16_DTPREL:
3215 1.1.1.2 christos /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3216 1.1.1.2 christos entry at index 3. */
3217 1.1.1.2 christos if (htab->dtpmod_refcount == 0)
3218 1.1.1.2 christos htab->next_gotplt_entry += 8;
3219 1.1.1.2 christos
3220 1.1 skrll htab->dtpmod_refcount++;
3221 1.1 skrll /* Fall through. */
3222 1.1 skrll
3223 1.1 skrll case R_CRIS_32_IE:
3224 1.1 skrll case R_CRIS_32_GD:
3225 1.1 skrll case R_CRIS_16_GOT_GD:
3226 1.1 skrll case R_CRIS_32_GOT_GD:
3227 1.1 skrll case R_CRIS_32_GOT_TPREL:
3228 1.1 skrll case R_CRIS_16_GOT_TPREL:
3229 1.1 skrll case R_CRIS_16_GOT:
3230 1.1 skrll case R_CRIS_32_GOT:
3231 1.1 skrll case R_CRIS_32_GOTREL:
3232 1.1 skrll case R_CRIS_32_PLT_GOTREL:
3233 1.1 skrll case R_CRIS_32_PLT_PCREL:
3234 1.1 skrll case R_CRIS_16_GOTPLT:
3235 1.1 skrll case R_CRIS_32_GOTPLT:
3236 1.1 skrll if (dynobj == NULL)
3237 1.1 skrll {
3238 1.1 skrll elf_hash_table (info)->dynobj = dynobj = abfd;
3239 1.1 skrll
3240 1.1 skrll /* We could handle this if we can get a handle on the
3241 1.1 skrll output bfd in elf_cris_adjust_dynamic_symbol. Failing
3242 1.1.1.4 christos that, we must insist on dynobj being a specific mach. */
3243 1.1 skrll if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3244 1.1.1.4 christos {
3245 1.1.1.4 christos (*_bfd_error_handler)
3246 1.1.1.4 christos (_("%B, section %A:\n v10/v32 compatible object %s"
3247 1.1.1.4 christos " must not contain a PIC relocation"),
3248 1.1.1.4 christos abfd, sec);
3249 1.1.1.4 christos return FALSE;
3250 1.1.1.4 christos }
3251 1.1 skrll }
3252 1.1 skrll
3253 1.1.1.2 christos if (sgot == NULL)
3254 1.1.1.4 christos {
3255 1.1.1.4 christos /* We may have a dynobj but no .got section, if machine-
3256 1.1.1.2 christos independent parts of the linker found a reason to create
3257 1.1.1.2 christos a dynobj. We want to create the .got section now, so we
3258 1.1.1.2 christos can assume it's always present whenever there's a dynobj.
3259 1.1.1.2 christos It's ok to call this function more than once. */
3260 1.1.1.2 christos if (!_bfd_elf_create_got_section (dynobj, info))
3261 1.1.1.2 christos return FALSE;
3262 1.1.1.2 christos
3263 1.1.1.2 christos sgot = bfd_get_linker_section (dynobj, ".got");
3264 1.1.1.2 christos }
3265 1.1.1.2 christos
3266 1.1.1.2 christos if (local_got_refcounts == NULL)
3267 1.1.1.2 christos {
3268 1.1.1.2 christos bfd_size_type amt;
3269 1.1.1.2 christos
3270 1.1.1.2 christos /* We use index local_got_refcounts[-1] to count all
3271 1.1.1.2 christos GOT-relative relocations that do not have explicit
3272 1.1.1.2 christos GOT entries. */
3273 1.1 skrll amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3274 1.1 skrll amt *= sizeof (bfd_signed_vma);
3275 1.1 skrll local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3276 1.1 skrll if (local_got_refcounts == NULL)
3277 1.1 skrll return FALSE;
3278 1.1 skrll
3279 1.1 skrll local_got_refcounts++;
3280 1.1 skrll elf_local_got_refcounts (abfd) = local_got_refcounts;
3281 1.1 skrll }
3282 1.1 skrll break;
3283 1.1.1.2 christos
3284 1.1.1.2 christos default:
3285 1.1.1.2 christos break;
3286 1.1.1.2 christos }
3287 1.1.1.2 christos
3288 1.1.1.2 christos /* Some relocs require a global offset table (but perhaps not a
3289 1.1.1.4 christos specific GOT entry). */
3290 1.1.1.2 christos switch (r_type)
3291 1.1.1.2 christos {
3292 1.1.1.2 christos case R_CRIS_16_DTPREL:
3293 1.1.1.2 christos case R_CRIS_32_DTPREL:
3294 1.1.1.2 christos /* Not requesting .got.rela for an executable: the contents
3295 1.1.1.2 christos of the first entry is constant there. For a shared
3296 1.1.1.2 christos library, we need .got.rela for the R_CRIS_DTPMOD
3297 1.1.1.2 christos relocation at index 3. */
3298 1.1.1.2 christos if (!bfd_link_pic (info))
3299 1.1.1.2 christos break;
3300 1.1.1.2 christos /* Fall through. */
3301 1.1 skrll
3302 1.1 skrll case R_CRIS_32_IE:
3303 1.1 skrll case R_CRIS_32_GD:
3304 1.1 skrll case R_CRIS_16_GOT_GD:
3305 1.1 skrll case R_CRIS_32_GOT_GD:
3306 1.1 skrll case R_CRIS_32_GOT_TPREL:
3307 1.1 skrll case R_CRIS_16_GOT_TPREL:
3308 1.1 skrll /* Fall through. */
3309 1.1 skrll
3310 1.1 skrll /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3311 1.1 skrll entry only for local symbols. Unfortunately, we don't know
3312 1.1 skrll until later on if there's a version script that forces the
3313 1.1.1.4 christos symbol local. We must have the .rela.got section in place
3314 1.1 skrll before we know if the symbol looks global now, so we need
3315 1.1.1.3 christos to treat the reloc just like for R_CRIS_16_GOT and
3316 1.1 skrll R_CRIS_32_GOT. */
3317 1.1 skrll case R_CRIS_16_GOTPLT:
3318 1.1.1.3 christos case R_CRIS_32_GOTPLT:
3319 1.1.1.3 christos case R_CRIS_16_GOT:
3320 1.1.1.3 christos case R_CRIS_32_GOT:
3321 1.1.1.3 christos if (srelgot == NULL
3322 1.1.1.3 christos && (h != NULL || bfd_link_pic (info)))
3323 1.1.1.3 christos {
3324 1.1 skrll srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3325 1.1 skrll if (srelgot == NULL)
3326 1.1 skrll {
3327 1.1 skrll flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3328 1.1 skrll | SEC_IN_MEMORY | SEC_LINKER_CREATED
3329 1.1.1.2 christos | SEC_READONLY);
3330 1.1 skrll srelgot = bfd_make_section_anyway_with_flags (dynobj,
3331 1.1.1.2 christos ".rela.got",
3332 1.1.1.2 christos flags);
3333 1.1.1.2 christos if (srelgot == NULL
3334 1.1 skrll || !bfd_set_section_alignment (dynobj, srelgot, 2))
3335 1.1.1.2 christos return FALSE;
3336 1.1.1.2 christos }
3337 1.1.1.2 christos }
3338 1.1.1.2 christos break;
3339 1.1.1.2 christos
3340 1.1.1.2 christos default:
3341 1.1.1.2 christos break;
3342 1.1.1.4 christos }
3343 1.1 skrll
3344 1.1.1.2 christos /* Warn and error for invalid input. */
3345 1.1.1.2 christos switch (r_type)
3346 1.1.1.2 christos {
3347 1.1.1.2 christos case R_CRIS_32_IE:
3348 1.1.1.2 christos case R_CRIS_32_TPREL:
3349 1.1.1.2 christos case R_CRIS_16_TPREL:
3350 1.1.1.2 christos case R_CRIS_32_GD:
3351 1.1.1.2 christos if (bfd_link_pic (info))
3352 1.1.1.2 christos {
3353 1.1.1.2 christos (*_bfd_error_handler)
3354 1.1.1.2 christos (_("%B, section %A:\n relocation %s not valid"
3355 1.1.1.2 christos " in a shared object;"
3356 1.1.1.2 christos " typically an option mixup, recompile with -fPIC"),
3357 1.1.1.2 christos abfd,
3358 1.1 skrll sec,
3359 1.1.1.2 christos cris_elf_howto_table[r_type].name);
3360 1.1.1.2 christos /* Don't return FALSE here; we want messages for all of
3361 1.1.1.2 christos these and the error behavior is ungraceful
3362 1.1.1.2 christos anyway. */
3363 1.1.1.2 christos }
3364 1.1.1.2 christos default:
3365 1.1.1.2 christos break;
3366 1.1.1.2 christos }
3367 1.1.1.2 christos
3368 1.1 skrll switch (r_type)
3369 1.1.1.2 christos {
3370 1.1.1.2 christos case R_CRIS_32_GD:
3371 1.1.1.2 christos case R_CRIS_16_GOT_GD:
3372 1.1.1.2 christos case R_CRIS_32_GOT_GD:
3373 1.1.1.2 christos /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3374 1.1.1.2 christos got_element_size = 8;
3375 1.1.1.2 christos r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3376 1.1.1.2 christos break;
3377 1.1.1.2 christos
3378 1.1.1.2 christos case R_CRIS_16_DTPREL:
3379 1.1.1.2 christos case R_CRIS_32_DTPREL:
3380 1.1.1.2 christos /* These two just request for the constant-index
3381 1.1.1.2 christos module-local tls_index-sized GOT entry, which we add
3382 1.1.1.2 christos elsewhere. */
3383 1.1.1.2 christos break;
3384 1.1.1.4 christos
3385 1.1.1.2 christos case R_CRIS_32_IE:
3386 1.1 skrll case R_CRIS_32_GOT_TPREL:
3387 1.1 skrll case R_CRIS_16_GOT_TPREL:
3388 1.1.1.2 christos r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3389 1.1.1.2 christos
3390 1.1.1.2 christos /* Those relocs also require that a DSO is of type
3391 1.1.1.2 christos Initial Exec. Like other targets, we don't reset this
3392 1.1 skrll flag even if the relocs are GC:ed away. */
3393 1.1 skrll if (bfd_link_pic (info))
3394 1.1 skrll info->flags |= DF_STATIC_TLS;
3395 1.1 skrll break;
3396 1.1 skrll
3397 1.1 skrll /* Let's list the other assembler-generated TLS-relocs too,
3398 1.1 skrll just to show that they're not forgotten. */
3399 1.1 skrll case R_CRIS_16_TPREL:
3400 1.1 skrll case R_CRIS_32_TPREL:
3401 1.1 skrll default:
3402 1.1 skrll break;
3403 1.1 skrll }
3404 1.1 skrll
3405 1.1.1.2 christos switch (r_type)
3406 1.1 skrll {
3407 1.1 skrll case R_CRIS_16_GOTPLT:
3408 1.1 skrll case R_CRIS_32_GOTPLT:
3409 1.1 skrll /* Mark that we need a GOT entry if the PLT entry (and its GOT
3410 1.1 skrll entry) is eliminated. We can only do this for a non-local
3411 1.1 skrll symbol. */
3412 1.1.1.2 christos if (h != NULL)
3413 1.1.1.2 christos {
3414 1.1.1.2 christos elf_cris_hash_entry (h)->gotplt_refcount++;
3415 1.1.1.2 christos goto handle_gotplt_reloc;
3416 1.1.1.2 christos }
3417 1.1.1.2 christos /* If h is NULL then this is a local symbol, and we must make a
3418 1.1 skrll GOT entry for it, so handle it like a GOT reloc. */
3419 1.1 skrll /* Fall through. */
3420 1.1 skrll
3421 1.1 skrll case R_CRIS_32_IE:
3422 1.1 skrll case R_CRIS_32_GD:
3423 1.1 skrll case R_CRIS_16_GOT_GD:
3424 1.1 skrll case R_CRIS_32_GOT_GD:
3425 1.1 skrll case R_CRIS_32_GOT_TPREL:
3426 1.1 skrll case R_CRIS_16_GOT_TPREL:
3427 1.1 skrll case R_CRIS_16_GOT:
3428 1.1 skrll case R_CRIS_32_GOT:
3429 1.1 skrll /* This symbol requires a global offset table entry. */
3430 1.1 skrll if (h != NULL)
3431 1.1 skrll {
3432 1.1.1.2 christos if (h->got.refcount == 0)
3433 1.1.1.2 christos {
3434 1.1 skrll /* Make sure this symbol is output as a dynamic symbol. */
3435 1.1.1.2 christos if (h->dynindx == -1)
3436 1.1.1.2 christos {
3437 1.1.1.2 christos if (!bfd_elf_link_record_dynamic_symbol (info, h))
3438 1.1.1.2 christos return FALSE;
3439 1.1.1.2 christos }
3440 1.1.1.2 christos }
3441 1.1.1.2 christos
3442 1.1.1.2 christos /* Update the sum of reloc counts for this symbol. */
3443 1.1.1.2 christos h->got.refcount++;
3444 1.1.1.2 christos
3445 1.1.1.2 christos switch (r_type)
3446 1.1.1.2 christos {
3447 1.1.1.2 christos case R_CRIS_16_GOT:
3448 1.1.1.2 christos case R_CRIS_32_GOT:
3449 1.1.1.2 christos if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3450 1.1.1.2 christos {
3451 1.1.1.2 christos /* Allocate space in the .got section. */
3452 1.1.1.2 christos sgot->size += got_element_size;
3453 1.1.1.2 christos /* Allocate relocation space. */
3454 1.1.1.2 christos srelgot->size += sizeof (Elf32_External_Rela);
3455 1.1.1.2 christos }
3456 1.1.1.2 christos elf_cris_hash_entry (h)->reg_got_refcount++;
3457 1.1.1.2 christos break;
3458 1.1.1.2 christos
3459 1.1.1.2 christos case R_CRIS_32_GD:
3460 1.1.1.2 christos case R_CRIS_16_GOT_GD:
3461 1.1.1.2 christos case R_CRIS_32_GOT_GD:
3462 1.1.1.2 christos if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3463 1.1.1.2 christos {
3464 1.1.1.2 christos /* Allocate space in the .got section. */
3465 1.1.1.2 christos sgot->size += got_element_size;
3466 1.1.1.2 christos /* Allocate relocation space. */
3467 1.1.1.2 christos srelgot->size += sizeof (Elf32_External_Rela);
3468 1.1.1.2 christos }
3469 1.1.1.2 christos elf_cris_hash_entry (h)->dtp_refcount++;
3470 1.1.1.2 christos break;
3471 1.1.1.2 christos
3472 1.1.1.2 christos case R_CRIS_32_IE:
3473 1.1.1.2 christos case R_CRIS_32_GOT_TPREL:
3474 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
3475 1.1.1.2 christos if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3476 1.1.1.2 christos {
3477 1.1.1.2 christos /* Allocate space in the .got section. */
3478 1.1.1.2 christos sgot->size += got_element_size;
3479 1.1.1.2 christos /* Allocate relocation space. */
3480 1.1 skrll srelgot->size += sizeof (Elf32_External_Rela);
3481 1.1 skrll }
3482 1.1 skrll elf_cris_hash_entry (h)->tprel_refcount++;
3483 1.1 skrll break;
3484 1.1.1.2 christos
3485 1.1 skrll default:
3486 1.1.1.2 christos BFD_FAIL ();
3487 1.1.1.4 christos break;
3488 1.1 skrll }
3489 1.1.1.2 christos }
3490 1.1.1.2 christos else
3491 1.1.1.2 christos {
3492 1.1.1.2 christos /* This is a global offset table entry for a local symbol. */
3493 1.1 skrll if (local_got_refcounts[r_symndx_lgot] == 0)
3494 1.1 skrll {
3495 1.1 skrll sgot->size += got_element_size;
3496 1.1.1.2 christos if (bfd_link_pic (info))
3497 1.1.1.2 christos {
3498 1.1.1.2 christos /* If we are generating a shared object, we need
3499 1.1.1.2 christos to output a R_CRIS_RELATIVE reloc so that the
3500 1.1 skrll dynamic linker can adjust this GOT entry.
3501 1.1 skrll Similarly for non-regular got entries. */
3502 1.1 skrll srelgot->size += sizeof (Elf32_External_Rela);
3503 1.1 skrll }
3504 1.1.1.2 christos }
3505 1.1.1.2 christos /* Update the reloc-specific count. */
3506 1.1 skrll local_got_refcounts[r_symndx_lgot]++;
3507 1.1 skrll
3508 1.1 skrll /* This one is the sum of all the others. */
3509 1.1 skrll local_got_refcounts[r_symndx]++;
3510 1.1 skrll }
3511 1.1 skrll break;
3512 1.1 skrll
3513 1.1 skrll case R_CRIS_16_DTPREL:
3514 1.1 skrll case R_CRIS_32_DTPREL:
3515 1.1 skrll case R_CRIS_32_GOTREL:
3516 1.1 skrll /* This reference requires a global offset table.
3517 1.1 skrll FIXME: The actual refcount isn't used currently; the .got
3518 1.1 skrll section can't be removed if there were any references in the
3519 1.1 skrll input. */
3520 1.1 skrll local_got_refcounts[-1]++;
3521 1.1 skrll break;
3522 1.1 skrll
3523 1.1 skrll handle_gotplt_reloc:
3524 1.1 skrll
3525 1.1 skrll case R_CRIS_32_PLT_GOTREL:
3526 1.1 skrll /* This reference requires a global offset table. */
3527 1.1 skrll local_got_refcounts[-1]++;
3528 1.1 skrll /* Fall through. */
3529 1.1 skrll
3530 1.1 skrll case R_CRIS_32_PLT_PCREL:
3531 1.1 skrll /* This symbol requires a procedure linkage table entry. We
3532 1.1 skrll actually build the entry in adjust_dynamic_symbol,
3533 1.1 skrll because this might be a case of linking PIC code which is
3534 1.1 skrll never referenced by a dynamic object, in which case we
3535 1.1 skrll don't need to generate a procedure linkage table entry
3536 1.1 skrll after all. */
3537 1.1 skrll
3538 1.1 skrll /* Beware: if we'd check for visibility of the symbol here
3539 1.1 skrll (and not marking the need for a PLT when non-visible), we'd
3540 1.1 skrll get into trouble with keeping handling consistent with
3541 1.1 skrll regards to relocs found before definition and GOTPLT
3542 1.1 skrll handling. Eliminable PLT entries will be dealt with later
3543 1.1 skrll anyway. */
3544 1.1 skrll if (h == NULL)
3545 1.1 skrll continue;
3546 1.1.1.2 christos
3547 1.1.1.2 christos h->needs_plt = 1;
3548 1.1.1.2 christos h->plt.refcount++;
3549 1.1.1.2 christos break;
3550 1.1.1.2 christos
3551 1.1.1.2 christos case R_CRIS_8:
3552 1.1.1.2 christos case R_CRIS_16:
3553 1.1.1.4 christos case R_CRIS_32:
3554 1.1 skrll /* Let's help debug shared library creation. Any of these
3555 1.1 skrll relocs *can* be used in shared libs, but pages containing
3556 1.1 skrll them cannot be shared, so they're not appropriate for
3557 1.1 skrll common use. Don't warn for sections we don't care about,
3558 1.1 skrll such as debug sections or non-constant sections. We
3559 1.1 skrll can't help tables of (global) function pointers, for
3560 1.1 skrll example, though they must be emitted in a (writable) data
3561 1.1 skrll section to avoid having impure text sections. */
3562 1.1 skrll if (bfd_link_pic (info)
3563 1.1 skrll && (sec->flags & SEC_ALLOC) != 0
3564 1.1 skrll && (sec->flags & SEC_READONLY) != 0)
3565 1.1.1.3 christos {
3566 1.1.1.3 christos /* FIXME: How do we make this optionally a warning only? */
3567 1.1.1.3 christos (*_bfd_error_handler)
3568 1.1.1.3 christos (_("%B, section %A:\n relocation %s should not"
3569 1.1.1.3 christos " be used in a shared object; recompile with -fPIC"),
3570 1.1.1.3 christos abfd,
3571 1.1.1.2 christos sec,
3572 1.1.1.2 christos cris_elf_howto_table[r_type].name);
3573 1.1.1.2 christos }
3574 1.1.1.2 christos
3575 1.1.1.2 christos /* We don't need to handle relocs into sections not going into
3576 1.1.1.2 christos the "real" output. */
3577 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
3578 1.1.1.2 christos break;
3579 1.1.1.2 christos
3580 1.1.1.2 christos if (h != NULL)
3581 1.1.1.2 christos {
3582 1.1.1.2 christos h->non_got_ref = 1;
3583 1.1.1.2 christos
3584 1.1.1.2 christos /* Make sure a plt entry is created for this symbol if it
3585 1.1.1.2 christos turns out to be a function defined by a dynamic object. */
3586 1.1.1.2 christos if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3587 1.1.1.2 christos h->plt.refcount++;
3588 1.1.1.2 christos }
3589 1.1.1.2 christos
3590 1.1.1.2 christos /* If we are creating a shared library and this is not a local
3591 1.1.1.2 christos symbol, we need to copy the reloc into the shared library.
3592 1.1.1.2 christos However when linking with -Bsymbolic and this is a global
3593 1.1.1.2 christos symbol which is defined in an object we are including in the
3594 1.1.1.2 christos link (i.e., DEF_REGULAR is set), then we can resolve the
3595 1.1.1.2 christos reloc directly. At this point we have not seen all the input
3596 1.1.1.2 christos files, so it is possible that DEF_REGULAR is not set now but
3597 1.1.1.4 christos will be set later (it is never cleared). In case of a weak
3598 1.1.1.2 christos definition, DEF_REGULAR may be cleared later by a strong
3599 1.1.1.2 christos definition in a shared library. We account for that
3600 1.1.1.2 christos possibility below by storing information in the relocs_copied
3601 1.1.1.2 christos field of the hash table entry. A similar situation occurs
3602 1.1.1.2 christos when creating shared libraries and symbol visibility changes
3603 1.1.1.2 christos render the symbol local. */
3604 1.1.1.2 christos
3605 1.1.1.2 christos /* No need to do anything if we're not creating a shared object. */
3606 1.1.1.2 christos if (! bfd_link_pic (info))
3607 1.1.1.2 christos break;
3608 1.1.1.2 christos
3609 1.1.1.2 christos /* We may need to create a reloc section in the dynobj and made room
3610 1.1.1.2 christos for this reloc. */
3611 1.1.1.2 christos if (sreloc == NULL)
3612 1.1.1.2 christos {
3613 1.1.1.2 christos sreloc = _bfd_elf_make_dynamic_reloc_section
3614 1.1.1.2 christos (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3615 1.1.1.2 christos
3616 1.1 skrll if (sreloc == NULL)
3617 1.1 skrll return FALSE;
3618 1.1 skrll }
3619 1.1 skrll
3620 1.1 skrll if (sec->flags & SEC_READONLY)
3621 1.1 skrll info->flags |= DF_TEXTREL;
3622 1.1 skrll
3623 1.1 skrll sreloc->size += sizeof (Elf32_External_Rela);
3624 1.1 skrll break;
3625 1.1 skrll
3626 1.1 skrll case R_CRIS_8_PCREL:
3627 1.1 skrll case R_CRIS_16_PCREL:
3628 1.1 skrll case R_CRIS_32_PCREL:
3629 1.1 skrll if (h != NULL)
3630 1.1 skrll {
3631 1.1 skrll h->non_got_ref = 1;
3632 1.1 skrll
3633 1.1 skrll /* Make sure a plt entry is created for this symbol if it
3634 1.1 skrll turns out to be a function defined by a dynamic object. */
3635 1.1 skrll if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3636 1.1 skrll h->plt.refcount++;
3637 1.1 skrll }
3638 1.1 skrll
3639 1.1 skrll /* If we are creating a shared library and this is not a local
3640 1.1 skrll symbol, we need to copy the reloc into the shared library.
3641 1.1 skrll However when linking with -Bsymbolic and this is a global
3642 1.1 skrll symbol which is defined in an object we are including in the
3643 1.1 skrll link (i.e., DEF_REGULAR is set), then we can resolve the
3644 1.1 skrll reloc directly. At this point we have not seen all the input
3645 1.1 skrll files, so it is possible that DEF_REGULAR is not set now but
3646 1.1.1.4 christos will be set later (it is never cleared). In case of a weak
3647 1.1 skrll definition, DEF_REGULAR may be cleared later by a strong
3648 1.1 skrll definition in a shared library. We account for that
3649 1.1 skrll possibility below by storing information in the relocs_copied
3650 1.1 skrll field of the hash table entry. A similar situation occurs
3651 1.1 skrll when creating shared libraries and symbol visibility changes
3652 1.1 skrll render the symbol local. */
3653 1.1 skrll
3654 1.1.1.2 christos /* No need to do anything if we're not creating a shared object. */
3655 1.1.1.2 christos if (! bfd_link_pic (info))
3656 1.1.1.2 christos break;
3657 1.1.1.2 christos
3658 1.1 skrll /* We don't need to handle relocs into sections not going into
3659 1.1.1.2 christos the "real" output. */
3660 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
3661 1.1.1.2 christos break;
3662 1.1.1.2 christos
3663 1.1.1.2 christos /* If the symbol is local, then we know already we can
3664 1.1.1.4 christos eliminate the reloc. */
3665 1.1.1.2 christos if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3666 1.1.1.2 christos break;
3667 1.1.1.2 christos
3668 1.1 skrll /* If this is with -Bsymbolic and the symbol isn't weak, and
3669 1.1.1.2 christos is defined by an ordinary object (the ones we include in
3670 1.1.1.2 christos this shared library) then we can also eliminate the
3671 1.1 skrll reloc. See comment above for more eliminable cases which
3672 1.1 skrll we can't identify at this time. */
3673 1.1.1.2 christos if (SYMBOLIC_BIND (info, h)
3674 1.1.1.2 christos && h->root.type != bfd_link_hash_defweak
3675 1.1 skrll && h->def_regular)
3676 1.1 skrll break;
3677 1.1.1.2 christos
3678 1.1 skrll /* We may need to create a reloc section in the dynobj and made room
3679 1.1 skrll for this reloc. */
3680 1.1 skrll if (sreloc == NULL)
3681 1.1 skrll {
3682 1.1.1.2 christos sreloc = _bfd_elf_make_dynamic_reloc_section
3683 1.1.1.2 christos (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3684 1.1.1.2 christos
3685 1.1.1.2 christos if (sreloc == NULL)
3686 1.1 skrll return FALSE;
3687 1.1.1.2 christos }
3688 1.1.1.2 christos
3689 1.1.1.2 christos sreloc->size += sizeof (Elf32_External_Rela);
3690 1.1 skrll
3691 1.1.1.2 christos /* We count the number of PC relative relocations we have
3692 1.1 skrll entered for this symbol, so that we can discard them
3693 1.1.1.2 christos again if the symbol is later defined by a regular object.
3694 1.1.1.2 christos We know that h is really a pointer to an
3695 1.1.1.2 christos elf_cris_link_hash_entry. */
3696 1.1 skrll {
3697 1.1.1.2 christos struct elf_cris_link_hash_entry *eh;
3698 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *p;
3699 1.1.1.2 christos
3700 1.1.1.2 christos eh = elf_cris_hash_entry (h);
3701 1.1.1.2 christos
3702 1.1.1.2 christos for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3703 1.1.1.2 christos if (p->section == sec)
3704 1.1.1.2 christos break;
3705 1.1.1.2 christos
3706 1.1.1.2 christos if (p == NULL)
3707 1.1.1.2 christos {
3708 1.1.1.2 christos p = ((struct elf_cris_pcrel_relocs_copied *)
3709 1.1 skrll bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3710 1.1.1.2 christos if (p == NULL)
3711 1.1.1.2 christos return FALSE;
3712 1.1 skrll p->next = eh->pcrel_relocs_copied;
3713 1.1 skrll eh->pcrel_relocs_copied = p;
3714 1.1 skrll p->section = sec;
3715 1.1 skrll p->count = 0;
3716 1.1 skrll p->r_type = r_type;
3717 1.1 skrll }
3718 1.1 skrll
3719 1.1 skrll ++p->count;
3720 1.1 skrll }
3721 1.1 skrll break;
3722 1.1 skrll
3723 1.1 skrll /* This relocation describes the C++ object vtable hierarchy.
3724 1.1 skrll Reconstruct it for later use during GC. */
3725 1.1 skrll case R_CRIS_GNU_VTINHERIT:
3726 1.1 skrll if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3727 1.1 skrll return FALSE;
3728 1.1 skrll break;
3729 1.1 skrll
3730 1.1.1.2 christos /* This relocation describes which C++ vtable entries are actually
3731 1.1.1.2 christos used. Record for later use during GC. */
3732 1.1.1.2 christos case R_CRIS_GNU_VTENTRY:
3733 1.1.1.2 christos BFD_ASSERT (h != NULL);
3734 1.1.1.2 christos if (h != NULL
3735 1.1 skrll && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3736 1.1 skrll return FALSE;
3737 1.1 skrll break;
3738 1.1 skrll
3739 1.1 skrll case R_CRIS_16_TPREL:
3740 1.1 skrll case R_CRIS_32_TPREL:
3741 1.1 skrll /* Already warned above, when necessary. */
3742 1.1 skrll break;
3743 1.1 skrll
3744 1.1 skrll default:
3745 1.1 skrll /* Other relocs do not appear here. */
3746 1.1 skrll bfd_set_error (bfd_error_bad_value);
3747 1.1 skrll return FALSE;
3748 1.1.1.2 christos }
3749 1.1.1.2 christos }
3750 1.1 skrll
3751 1.1.1.2 christos return TRUE;
3752 1.1 skrll }
3753 1.1 skrll
3754 1.1 skrll /* Set the sizes of the dynamic sections. */
3755 1.1 skrll
3756 1.1 skrll static bfd_boolean
3757 1.1.1.2 christos elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3758 1.1.1.2 christos struct bfd_link_info *info)
3759 1.1.1.2 christos {
3760 1.1.1.2 christos struct elf_cris_link_hash_table * htab;
3761 1.1 skrll bfd *dynobj;
3762 1.1 skrll asection *s;
3763 1.1 skrll bfd_boolean plt;
3764 1.1 skrll bfd_boolean relocs;
3765 1.1 skrll
3766 1.1 skrll htab = elf_cris_hash_table (info);
3767 1.1.1.4 christos if (htab == NULL)
3768 1.1 skrll return FALSE;
3769 1.1.1.3 christos
3770 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
3771 1.1 skrll BFD_ASSERT (dynobj != NULL);
3772 1.1 skrll
3773 1.1 skrll if (elf_hash_table (info)->dynamic_sections_created)
3774 1.1 skrll {
3775 1.1 skrll /* Set the contents of the .interp section to the interpreter. */
3776 1.1 skrll if (bfd_link_executable (info) && !info->nointerp)
3777 1.1 skrll {
3778 1.1.1.2 christos s = bfd_get_linker_section (dynobj, ".interp");
3779 1.1.1.2 christos BFD_ASSERT (s != NULL);
3780 1.1 skrll s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3781 1.1 skrll s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3782 1.1 skrll }
3783 1.1 skrll }
3784 1.1 skrll else
3785 1.1 skrll {
3786 1.1.1.3 christos /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3787 1.1 skrll elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3788 1.1 skrll info);
3789 1.1 skrll
3790 1.1 skrll /* We may have created entries in the .rela.got section.
3791 1.1 skrll However, if we are not creating the dynamic sections, we will
3792 1.1 skrll not actually use these entries. Reset the size of .rela.got,
3793 1.1 skrll which will cause it to get stripped from the output file
3794 1.1 skrll below. */
3795 1.1 skrll s = bfd_get_linker_section (dynobj, ".rela.got");
3796 1.1 skrll if (s != NULL)
3797 1.1 skrll s->size = 0;
3798 1.1.1.4 christos }
3799 1.1.1.2 christos
3800 1.1 skrll /* If this is a -Bsymbolic shared link, then we need to discard all PC
3801 1.1.1.2 christos relative relocs against symbols defined in a regular object. We
3802 1.1 skrll allocated space for them in the check_relocs routine, but we will not
3803 1.1.1.2 christos fill them in in the relocate_section routine. We also discard space
3804 1.1 skrll for relocs that have become for local symbols due to symbol
3805 1.1.1.2 christos visibility changes. For programs, we discard space for relocs for
3806 1.1 skrll symbols not referenced by any dynamic object. */
3807 1.1 skrll if (bfd_link_pic (info))
3808 1.1 skrll elf_cris_link_hash_traverse (htab,
3809 1.1 skrll elf_cris_discard_excess_dso_dynamics,
3810 1.1 skrll info);
3811 1.1 skrll else
3812 1.1 skrll elf_cris_link_hash_traverse (htab,
3813 1.1 skrll elf_cris_discard_excess_program_dynamics,
3814 1.1 skrll info);
3815 1.1 skrll
3816 1.1 skrll /* The check_relocs and adjust_dynamic_symbol entry points have
3817 1.1 skrll determined the sizes of the various dynamic sections. Allocate
3818 1.1 skrll memory for them. */
3819 1.1 skrll plt = FALSE;
3820 1.1 skrll relocs = FALSE;
3821 1.1 skrll for (s = dynobj->sections; s != NULL; s = s->next)
3822 1.1 skrll {
3823 1.1 skrll const char *name;
3824 1.1 skrll
3825 1.1 skrll if ((s->flags & SEC_LINKER_CREATED) == 0)
3826 1.1 skrll continue;
3827 1.1 skrll
3828 1.1.1.2 christos /* It's OK to base decisions on the section name, because none
3829 1.1.1.2 christos of the dynobj section names depend upon the input files. */
3830 1.1.1.2 christos name = bfd_get_section_name (dynobj, s);
3831 1.1.1.2 christos
3832 1.1.1.2 christos if (strcmp (name, ".plt") == 0)
3833 1.1.1.2 christos {
3834 1.1.1.2 christos /* Remember whether there is a PLT. */
3835 1.1.1.2 christos plt = s->size != 0;
3836 1.1 skrll }
3837 1.1 skrll else if (strcmp (name, ".got.plt") == 0)
3838 1.1.1.2 christos {
3839 1.1.1.2 christos /* The .got.plt contains the .got header as well as the
3840 1.1.1.4 christos actual .got.plt contents. The .got header may contain a
3841 1.1.1.2 christos R_CRIS_DTPMOD entry at index 3. */
3842 1.1.1.2 christos s->size += htab->dtpmod_refcount != 0
3843 1.1 skrll ? 8 : 0;
3844 1.1 skrll }
3845 1.1 skrll else if (CONST_STRNEQ (name, ".rela"))
3846 1.1 skrll {
3847 1.1 skrll if (strcmp (name, ".rela.got") == 0
3848 1.1 skrll && htab->dtpmod_refcount != 0
3849 1.1 skrll && bfd_link_pic (info))
3850 1.1 skrll s->size += sizeof (Elf32_External_Rela);
3851 1.1 skrll
3852 1.1 skrll if (s->size != 0)
3853 1.1 skrll {
3854 1.1 skrll /* Remember whether there are any reloc sections other
3855 1.1 skrll than .rela.plt. */
3856 1.1 skrll if (strcmp (name, ".rela.plt") != 0)
3857 1.1 skrll relocs = TRUE;
3858 1.1 skrll
3859 1.1 skrll /* We use the reloc_count field as a counter if we need
3860 1.1 skrll to copy relocs into the output file. */
3861 1.1 skrll s->reloc_count = 0;
3862 1.1 skrll }
3863 1.1 skrll }
3864 1.1 skrll else if (! CONST_STRNEQ (name, ".got")
3865 1.1 skrll && strcmp (name, ".dynbss") != 0)
3866 1.1 skrll {
3867 1.1 skrll /* It's not one of our sections, so don't allocate space. */
3868 1.1 skrll continue;
3869 1.1 skrll }
3870 1.1 skrll
3871 1.1 skrll if (s->size == 0)
3872 1.1 skrll {
3873 1.1 skrll /* If we don't need this section, strip it from the
3874 1.1 skrll output file. This is mostly to handle .rela.bss and
3875 1.1 skrll .rela.plt. We must create both sections in
3876 1.1 skrll create_dynamic_sections, because they must be created
3877 1.1 skrll before the linker maps input sections to output
3878 1.1 skrll sections. The linker does that before
3879 1.1 skrll adjust_dynamic_symbol is called, and it is that
3880 1.1 skrll function which decides whether anything needs to go
3881 1.1 skrll into these sections. */
3882 1.1 skrll s->flags |= SEC_EXCLUDE;
3883 1.1 skrll continue;
3884 1.1 skrll }
3885 1.1 skrll
3886 1.1 skrll if ((s->flags & SEC_HAS_CONTENTS) == 0)
3887 1.1 skrll continue;
3888 1.1 skrll
3889 1.1 skrll /* Allocate memory for the section contents. We use bfd_zalloc here
3890 1.1 skrll in case unused entries are not reclaimed before the section's
3891 1.1 skrll contents are written out. This should not happen, but this way
3892 1.1 skrll if it does, we will not write out garbage. For reloc sections,
3893 1.1 skrll this will make entries have the type R_CRIS_NONE. */
3894 1.1 skrll s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3895 1.1 skrll if (s->contents == NULL)
3896 1.1 skrll return FALSE;
3897 1.1 skrll }
3898 1.1 skrll
3899 1.1 skrll if (elf_hash_table (info)->dynamic_sections_created)
3900 1.1.1.4 christos {
3901 1.1 skrll /* Add some entries to the .dynamic section. We fill in the
3902 1.1 skrll values later, in elf_cris_finish_dynamic_sections, but we
3903 1.1 skrll must add the entries now so that we get the correct size for
3904 1.1 skrll the .dynamic section. The DT_DEBUG entry is filled in by the
3905 1.1 skrll dynamic linker and used by the debugger. */
3906 1.1 skrll #define add_dynamic_entry(TAG, VAL) \
3907 1.1 skrll _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3908 1.1 skrll
3909 1.1 skrll if (!bfd_link_pic (info))
3910 1.1 skrll {
3911 1.1 skrll if (!add_dynamic_entry (DT_DEBUG, 0))
3912 1.1 skrll return FALSE;
3913 1.1 skrll }
3914 1.1 skrll
3915 1.1 skrll if (plt)
3916 1.1 skrll {
3917 1.1 skrll if (!add_dynamic_entry (DT_PLTGOT, 0)
3918 1.1 skrll || !add_dynamic_entry (DT_PLTRELSZ, 0)
3919 1.1 skrll || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3920 1.1 skrll || !add_dynamic_entry (DT_JMPREL, 0))
3921 1.1 skrll return FALSE;
3922 1.1 skrll }
3923 1.1 skrll
3924 1.1 skrll if (relocs)
3925 1.1 skrll {
3926 1.1 skrll if (!add_dynamic_entry (DT_RELA, 0)
3927 1.1 skrll || !add_dynamic_entry (DT_RELASZ, 0)
3928 1.1 skrll || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3929 1.1 skrll return FALSE;
3930 1.1 skrll }
3931 1.1 skrll
3932 1.1 skrll if ((info->flags & DF_TEXTREL) != 0)
3933 1.1 skrll {
3934 1.1 skrll if (!add_dynamic_entry (DT_TEXTREL, 0))
3935 1.1 skrll return FALSE;
3936 1.1 skrll info->flags |= DF_TEXTREL;
3937 1.1 skrll }
3938 1.1 skrll }
3939 1.1 skrll #undef add_dynamic_entry
3940 1.1 skrll
3941 1.1 skrll return TRUE;
3942 1.1 skrll }
3943 1.1 skrll
3944 1.1 skrll /* This function is called via elf_cris_link_hash_traverse if we are
3945 1.1.1.3 christos creating a shared object. In the -Bsymbolic case, it discards the
3946 1.1.1.3 christos space allocated to copy PC relative relocs against symbols which
3947 1.1 skrll are defined in regular objects. For the normal non-symbolic case,
3948 1.1 skrll we also discard space for relocs that have become local due to
3949 1.1 skrll symbol visibility changes. We allocated space for them in the
3950 1.1 skrll check_relocs routine, but we won't fill them in in the
3951 1.1 skrll relocate_section routine. */
3952 1.1 skrll
3953 1.1 skrll static bfd_boolean
3954 1.1 skrll elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3955 1.1 skrll void * inf)
3956 1.1.1.4 christos {
3957 1.1 skrll struct elf_cris_pcrel_relocs_copied *s;
3958 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) inf;
3959 1.1.1.2 christos
3960 1.1.1.2 christos /* If a symbol has been forced local or we have found a regular
3961 1.1.1.2 christos definition for the symbolic link case, then we won't be needing
3962 1.1.1.2 christos any relocs. */
3963 1.1.1.2 christos if (h->root.def_regular
3964 1.1.1.2 christos && (h->root.forced_local
3965 1.1.1.2 christos || SYMBOLIC_BIND (info, &h->root)))
3966 1.1.1.2 christos {
3967 1.1.1.2 christos for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3968 1.1 skrll {
3969 1.1 skrll asection *sreloc
3970 1.1.1.2 christos = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3971 1.1.1.2 christos ->dynobj,
3972 1.1.1.2 christos s->section,
3973 1.1.1.2 christos /*rela?*/ TRUE);
3974 1.1.1.2 christos sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3975 1.1.1.2 christos }
3976 1.1.1.2 christos return TRUE;
3977 1.1.1.2 christos }
3978 1.1.1.2 christos
3979 1.1.1.2 christos /* If we have accounted for PC-relative relocs for read-only
3980 1.1.1.2 christos sections, now is the time to warn for them. We can't do it in
3981 1.1.1.2 christos cris_elf_check_relocs, because we don't know the status of all
3982 1.1.1.2 christos symbols at that time (and it's common to force symbols local
3983 1.1.1.2 christos late). */
3984 1.1.1.2 christos
3985 1.1.1.2 christos for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3986 1.1.1.2 christos if ((s->section->flags & SEC_READONLY) != 0)
3987 1.1.1.2 christos {
3988 1.1.1.2 christos /* FIXME: How do we make this optionally a warning only? */
3989 1.1.1.2 christos (*_bfd_error_handler)
3990 1.1.1.2 christos (_("%B, section `%A', to symbol `%s':\n"
3991 1.1.1.2 christos " relocation %s should not be used"
3992 1.1 skrll " in a shared object; recompile with -fPIC"),
3993 1.1 skrll s->section->owner,
3994 1.1 skrll s->section,
3995 1.1 skrll h->root.root.root.string,
3996 1.1 skrll cris_elf_howto_table[s->r_type].name);
3997 1.1 skrll
3998 1.1 skrll info->flags |= DF_TEXTREL;
3999 1.1 skrll }
4000 1.1.1.3 christos
4001 1.1.1.3 christos return TRUE;
4002 1.1 skrll }
4003 1.1 skrll
4004 1.1 skrll /* This function is called via elf_cris_link_hash_traverse if we are *not*
4005 1.1 skrll creating a shared object. We discard space for relocs for symbols put
4006 1.1 skrll in the .got, but which we found we do not have to resolve at run-time. */
4007 1.1 skrll
4008 1.1 skrll static bfd_boolean
4009 1.1 skrll elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
4010 1.1 skrll void * inf)
4011 1.1 skrll {
4012 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) inf;
4013 1.1.1.2 christos
4014 1.1 skrll /* If we're not creating a shared library and have a symbol which is
4015 1.1 skrll referred to by .got references, but the symbol is defined locally,
4016 1.1 skrll (or rather, not defined by a DSO) then lose the reloc for the .got
4017 1.1 skrll (don't allocate room for it). Likewise for relocs for something
4018 1.1 skrll for which we create a PLT. */
4019 1.1 skrll if (!h->root.def_dynamic
4020 1.1 skrll || h->root.plt.refcount > 0)
4021 1.1 skrll {
4022 1.1 skrll if (h->reg_got_refcount > 0
4023 1.1 skrll /* The size of this section is only valid and in sync with the
4024 1.1.1.3 christos various reference counts if we do dynamic; don't decrement it
4025 1.1 skrll otherwise. */
4026 1.1 skrll && elf_hash_table (info)->dynamic_sections_created)
4027 1.1 skrll {
4028 1.1 skrll bfd *dynobj = elf_hash_table (info)->dynobj;
4029 1.1 skrll asection *srelgot;
4030 1.1 skrll
4031 1.1 skrll BFD_ASSERT (dynobj != NULL);
4032 1.1 skrll
4033 1.1 skrll srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4034 1.1 skrll
4035 1.1 skrll BFD_ASSERT (srelgot != NULL);
4036 1.1 skrll
4037 1.1 skrll srelgot->size -= sizeof (Elf32_External_Rela);
4038 1.1 skrll }
4039 1.1 skrll
4040 1.1 skrll /* If the locally-defined symbol isn't used by a DSO, then we don't
4041 1.1 skrll have to export it as a dynamic symbol. This was already done for
4042 1.1 skrll functions; doing this for all symbols would presumably not
4043 1.1 skrll introduce new problems. Of course we don't do this if we're
4044 1.1 skrll exporting all dynamic symbols. */
4045 1.1 skrll if (! info->export_dynamic
4046 1.1 skrll && h->root.dynindx != -1
4047 1.1 skrll && !h->root.def_dynamic
4048 1.1 skrll && !h->root.ref_dynamic)
4049 1.1 skrll {
4050 1.1 skrll h->root.dynindx = -1;
4051 1.1 skrll _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4052 1.1 skrll h->root.dynstr_index);
4053 1.1 skrll }
4054 1.1.1.3 christos }
4055 1.1 skrll
4056 1.1 skrll return TRUE;
4057 1.1 skrll }
4058 1.1 skrll
4059 1.1 skrll /* Reject a file depending on presence and expectation of prefixed
4060 1.1 skrll underscores on symbols. */
4061 1.1 skrll
4062 1.1 skrll static bfd_boolean
4063 1.1 skrll cris_elf_object_p (bfd *abfd)
4064 1.1 skrll {
4065 1.1 skrll if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4066 1.1 skrll return FALSE;
4067 1.1 skrll
4068 1.1 skrll if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4069 1.1.1.3 christos return (bfd_get_symbol_leading_char (abfd) == '_');
4070 1.1.1.3 christos else
4071 1.1 skrll return (bfd_get_symbol_leading_char (abfd) == 0);
4072 1.1 skrll }
4073 1.1 skrll
4074 1.1 skrll /* Mark presence or absence of leading underscore. Set machine type
4075 1.1 skrll flags from mach type. */
4076 1.1 skrll
4077 1.1 skrll static void
4078 1.1 skrll cris_elf_final_write_processing (bfd *abfd,
4079 1.1 skrll bfd_boolean linker ATTRIBUTE_UNUSED)
4080 1.1 skrll {
4081 1.1 skrll unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4082 1.1 skrll
4083 1.1 skrll e_flags &= ~EF_CRIS_UNDERSCORE;
4084 1.1 skrll if (bfd_get_symbol_leading_char (abfd) == '_')
4085 1.1 skrll e_flags |= EF_CRIS_UNDERSCORE;
4086 1.1 skrll
4087 1.1 skrll switch (bfd_get_mach (abfd))
4088 1.1 skrll {
4089 1.1 skrll case bfd_mach_cris_v0_v10:
4090 1.1 skrll e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4091 1.1 skrll break;
4092 1.1 skrll
4093 1.1 skrll case bfd_mach_cris_v10_v32:
4094 1.1 skrll e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4095 1.1 skrll break;
4096 1.1 skrll
4097 1.1 skrll case bfd_mach_cris_v32:
4098 1.1 skrll e_flags |= EF_CRIS_VARIANT_V32;
4099 1.1 skrll break;
4100 1.1 skrll
4101 1.1 skrll default:
4102 1.1 skrll _bfd_abort (__FILE__, __LINE__,
4103 1.1.1.3 christos _("Unexpected machine number"));
4104 1.1.1.3 christos }
4105 1.1 skrll
4106 1.1 skrll elf_elfheader (abfd)->e_flags = e_flags;
4107 1.1 skrll }
4108 1.1 skrll
4109 1.1 skrll /* Set the mach type from e_flags value. */
4110 1.1 skrll
4111 1.1 skrll static bfd_boolean
4112 1.1 skrll cris_elf_set_mach_from_flags (bfd *abfd,
4113 1.1 skrll unsigned long flags)
4114 1.1 skrll {
4115 1.1 skrll switch (flags & EF_CRIS_VARIANT_MASK)
4116 1.1 skrll {
4117 1.1 skrll case EF_CRIS_VARIANT_ANY_V0_V10:
4118 1.1 skrll bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4119 1.1 skrll break;
4120 1.1 skrll
4121 1.1 skrll case EF_CRIS_VARIANT_V32:
4122 1.1 skrll bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4123 1.1 skrll break;
4124 1.1 skrll
4125 1.1 skrll case EF_CRIS_VARIANT_COMMON_V10_V32:
4126 1.1 skrll bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4127 1.1 skrll break;
4128 1.1 skrll
4129 1.1 skrll default:
4130 1.1 skrll /* Since we don't recognize them, we obviously can't support them
4131 1.1 skrll with this code; we'd have to require that all future handling
4132 1.1 skrll would be optional. */
4133 1.1 skrll bfd_set_error (bfd_error_wrong_format);
4134 1.1.1.3 christos return FALSE;
4135 1.1 skrll }
4136 1.1 skrll
4137 1.1 skrll return TRUE;
4138 1.1 skrll }
4139 1.1 skrll
4140 1.1 skrll /* Display the flags field. */
4141 1.1 skrll
4142 1.1 skrll static bfd_boolean
4143 1.1 skrll cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
4144 1.1 skrll {
4145 1.1 skrll FILE *file = (FILE *) ptr;
4146 1.1 skrll
4147 1.1 skrll BFD_ASSERT (abfd != NULL && ptr != NULL);
4148 1.1 skrll
4149 1.1 skrll _bfd_elf_print_private_bfd_data (abfd, ptr);
4150 1.1 skrll
4151 1.1 skrll fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4152 1.1 skrll
4153 1.1 skrll if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4154 1.1 skrll fprintf (file, _(" [symbols have a _ prefix]"));
4155 1.1 skrll if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4156 1.1 skrll == EF_CRIS_VARIANT_COMMON_V10_V32)
4157 1.1 skrll fprintf (file, _(" [v10 and v32]"));
4158 1.1 skrll if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4159 1.1 skrll == EF_CRIS_VARIANT_V32)
4160 1.1.1.3 christos fprintf (file, _(" [v32]"));
4161 1.1 skrll
4162 1.1 skrll fputc ('\n', file);
4163 1.1 skrll return TRUE;
4164 1.1 skrll }
4165 1.1 skrll
4166 1.1 skrll /* Don't mix files with and without a leading underscore. */
4167 1.1 skrll
4168 1.1 skrll static bfd_boolean
4169 1.1 skrll cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4170 1.1 skrll {
4171 1.1 skrll int imach, omach;
4172 1.1 skrll
4173 1.1 skrll if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4174 1.1 skrll return FALSE;
4175 1.1 skrll
4176 1.1 skrll if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4177 1.1 skrll || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4178 1.1 skrll return TRUE;
4179 1.1 skrll
4180 1.1 skrll imach = bfd_get_mach (ibfd);
4181 1.1 skrll
4182 1.1 skrll if (! elf_flags_init (obfd))
4183 1.1 skrll {
4184 1.1 skrll /* This happens when ld starts out with a 'blank' output file. */
4185 1.1 skrll elf_flags_init (obfd) = TRUE;
4186 1.1 skrll
4187 1.1 skrll /* We ignore the linker-set mach, and instead set it according to
4188 1.1 skrll the first input file. This would also happen if we could
4189 1.1 skrll somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4190 1.1 skrll This allows us to keep the same linker config across
4191 1.1 skrll cris(v0..v10) and crisv32. The drawback is that we can't force
4192 1.1 skrll the output type, which might be a sane thing to do for a
4193 1.1 skrll v10+v32 compatibility object. */
4194 1.1 skrll if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4195 1.1 skrll return FALSE;
4196 1.1 skrll }
4197 1.1 skrll
4198 1.1 skrll if (bfd_get_symbol_leading_char (ibfd)
4199 1.1 skrll != bfd_get_symbol_leading_char (obfd))
4200 1.1 skrll {
4201 1.1 skrll (*_bfd_error_handler)
4202 1.1 skrll (bfd_get_symbol_leading_char (ibfd) == '_'
4203 1.1 skrll ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4204 1.1 skrll : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4205 1.1 skrll ibfd);
4206 1.1 skrll bfd_set_error (bfd_error_bad_value);
4207 1.1 skrll return FALSE;
4208 1.1 skrll }
4209 1.1 skrll
4210 1.1 skrll omach = bfd_get_mach (obfd);
4211 1.1 skrll
4212 1.1 skrll if (imach != omach)
4213 1.1 skrll {
4214 1.1 skrll /* We can get an incompatible combination only if either is
4215 1.1 skrll bfd_mach_cris_v32, and the other one isn't compatible. */
4216 1.1 skrll if ((imach == bfd_mach_cris_v32
4217 1.1 skrll && omach != bfd_mach_cris_v10_v32)
4218 1.1 skrll || (omach == bfd_mach_cris_v32
4219 1.1 skrll && imach != bfd_mach_cris_v10_v32))
4220 1.1 skrll {
4221 1.1 skrll (*_bfd_error_handler)
4222 1.1 skrll ((imach == bfd_mach_cris_v32)
4223 1.1 skrll ? _("%B contains CRIS v32 code, incompatible"
4224 1.1 skrll " with previous objects")
4225 1.1 skrll : _("%B contains non-CRIS-v32 code, incompatible"
4226 1.1 skrll " with previous objects"),
4227 1.1 skrll ibfd);
4228 1.1 skrll bfd_set_error (bfd_error_bad_value);
4229 1.1 skrll return FALSE;
4230 1.1 skrll }
4231 1.1 skrll
4232 1.1 skrll /* We don't have to check the case where the input is compatible
4233 1.1 skrll with v10 and v32, because the output is already known to be set
4234 1.1 skrll to the other (compatible) mach. */
4235 1.1 skrll if (omach == bfd_mach_cris_v10_v32
4236 1.1 skrll && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4237 1.1.1.3 christos return FALSE;
4238 1.1 skrll }
4239 1.1 skrll
4240 1.1 skrll return TRUE;
4241 1.1 skrll }
4242 1.1 skrll
4243 1.1 skrll /* Do side-effects of e_flags copying to obfd. */
4244 1.1 skrll
4245 1.1 skrll static bfd_boolean
4246 1.1 skrll cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4247 1.1 skrll {
4248 1.1 skrll /* Call the base function. */
4249 1.1 skrll if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4250 1.1 skrll return FALSE;
4251 1.1 skrll
4252 1.1 skrll /* If output is big-endian for some obscure reason, stop here. */
4253 1.1 skrll if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4254 1.1 skrll return FALSE;
4255 1.1 skrll
4256 1.1.1.4 christos if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4257 1.1.1.4 christos || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4258 1.1.1.4 christos return TRUE;
4259 1.1 skrll
4260 1.1.1.2 christos /* Do what we really came here for. */
4261 1.1.1.2 christos return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4262 1.1 skrll }
4263 1.1 skrll
4264 1.1 skrll static enum elf_reloc_type_class
4265 1.1 skrll elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4266 1.1 skrll const asection *rel_sec ATTRIBUTE_UNUSED,
4267 1.1 skrll const Elf_Internal_Rela *rela)
4268 1.1 skrll {
4269 1.1 skrll enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4270 1.1 skrll switch (r_type)
4271 1.1 skrll {
4272 1.1 skrll case R_CRIS_RELATIVE:
4273 1.1.1.2 christos return reloc_class_relative;
4274 1.1.1.2 christos case R_CRIS_JUMP_SLOT:
4275 1.1.1.2 christos return reloc_class_plt;
4276 1.1.1.2 christos case R_CRIS_COPY:
4277 1.1.1.2 christos return reloc_class_copy;
4278 1.1.1.2 christos default:
4279 1.1.1.2 christos return reloc_class_normal;
4280 1.1.1.2 christos }
4281 1.1.1.2 christos }
4282 1.1.1.2 christos
4283 1.1.1.2 christos /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4284 1.1.1.2 christos two GOT entries from three types with two different sizes. We handle
4285 1.1.1.2 christos it as a single entry, so we can use the regular offset-calculation
4286 1.1.1.2 christos machinery. */
4287 1.1.1.2 christos
4288 1.1.1.2 christos static bfd_vma
4289 1.1.1.2 christos elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4290 1.1.1.2 christos struct bfd_link_info *info ATTRIBUTE_UNUSED,
4291 1.1.1.2 christos struct elf_link_hash_entry *hr,
4292 1.1.1.2 christos bfd *ibfd,
4293 1.1.1.2 christos unsigned long symndx)
4294 1.1.1.2 christos {
4295 1.1.1.2 christos struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4296 1.1.1.2 christos bfd_vma eltsiz = 0;
4297 1.1.1.2 christos
4298 1.1.1.2 christos /* We may have one regular GOT entry or up to two TLS GOT
4299 1.1.1.2 christos entries. */
4300 1.1.1.2 christos if (h == NULL)
4301 1.1.1.2 christos {
4302 1.1.1.2 christos Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4303 1.1.1.2 christos bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4304 1.1.1.2 christos
4305 1.1.1.2 christos BFD_ASSERT (local_got_refcounts != NULL);
4306 1.1.1.2 christos
4307 1.1.1.2 christos if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4308 1.1.1.2 christos {
4309 1.1.1.2 christos /* We can't have a variable referred to both as a regular
4310 1.1.1.2 christos variable and through TLS relocs. */
4311 1.1.1.2 christos BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4312 1.1.1.2 christos && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4313 1.1.1.2 christos return 4;
4314 1.1.1.2 christos }
4315 1.1.1.2 christos
4316 1.1.1.2 christos if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4317 1.1.1.2 christos eltsiz += 8;
4318 1.1.1.2 christos
4319 1.1.1.2 christos if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4320 1.1.1.2 christos eltsiz += 4;
4321 1.1.1.2 christos }
4322 1.1.1.2 christos else
4323 1.1.1.2 christos {
4324 1.1.1.2 christos struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4325 1.1.1.2 christos if (hh->reg_got_refcount > 0)
4326 1.1.1.2 christos {
4327 1.1.1.2 christos /* The actual error-on-input is emitted elsewhere. */
4328 1.1.1.2 christos BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4329 1.1.1.2 christos return 4;
4330 1.1.1.2 christos }
4331 1.1.1.2 christos
4332 1.1.1.2 christos if (hh->dtp_refcount > 0)
4333 1.1.1.2 christos eltsiz += 8;
4334 1.1.1.2 christos
4335 1.1 skrll if (hh->tprel_refcount > 0)
4336 1.1 skrll eltsiz += 4;
4337 1.1.1.2 christos }
4338 1.1 skrll
4339 1.1 skrll /* We're only called when h->got.refcount is non-zero, so we must
4340 1.1 skrll have a non-zero size. */
4341 1.1.1.4 christos BFD_ASSERT (eltsiz != 0);
4342 1.1 skrll return eltsiz;
4343 1.1 skrll }
4344 1.1 skrll
4345 1.1 skrll #define ELF_ARCH bfd_arch_cris
4347 1.1 skrll #define ELF_TARGET_ID CRIS_ELF_DATA
4348 1.1 skrll #define ELF_MACHINE_CODE EM_CRIS
4349 1.1 skrll #define ELF_MAXPAGESIZE 0x2000
4350 1.1.1.2 christos
4351 1.1 skrll #define TARGET_LITTLE_SYM cris_elf32_vec
4352 1.1 skrll #define TARGET_LITTLE_NAME "elf32-cris"
4353 1.1 skrll #define elf_symbol_leading_char 0
4354 1.1 skrll
4355 1.1 skrll #define elf_info_to_howto_rel NULL
4356 1.1 skrll #define elf_info_to_howto cris_info_to_howto_rela
4357 1.1 skrll #define elf_backend_relocate_section cris_elf_relocate_section
4358 1.1 skrll #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4359 1.1 skrll #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4360 1.1 skrll #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4361 1.1 skrll #define elf_backend_check_relocs cris_elf_check_relocs
4362 1.1 skrll #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4363 1.1 skrll #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4364 1.1 skrll
4365 1.1 skrll #define elf_backend_can_gc_sections 1
4366 1.1 skrll #define elf_backend_can_refcount 1
4367 1.1 skrll
4368 1.1 skrll #define elf_backend_object_p cris_elf_object_p
4369 1.1 skrll #define elf_backend_final_write_processing \
4370 1.1 skrll cris_elf_final_write_processing
4371 1.1 skrll #define bfd_elf32_bfd_print_private_bfd_data \
4372 1.1 skrll cris_elf_print_private_bfd_data
4373 1.1 skrll #define bfd_elf32_bfd_merge_private_bfd_data \
4374 1.1 skrll cris_elf_merge_private_bfd_data
4375 1.1.1.2 christos #define bfd_elf32_bfd_copy_private_bfd_data \
4376 1.1.1.2 christos cris_elf_copy_private_bfd_data
4377 1.1 skrll
4378 1.1 skrll #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4379 1.1 skrll #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4380 1.1 skrll
4381 1.1 skrll #define bfd_elf32_bfd_link_hash_table_create \
4382 1.1 skrll elf_cris_link_hash_table_create
4383 1.1 skrll #define elf_backend_adjust_dynamic_symbol \
4384 1.1 skrll elf_cris_adjust_dynamic_symbol
4385 1.1 skrll #define elf_backend_copy_indirect_symbol \
4386 1.1 skrll elf_cris_copy_indirect_symbol
4387 1.1 skrll #define elf_backend_size_dynamic_sections \
4388 1.1 skrll elf_cris_size_dynamic_sections
4389 1.1 skrll #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4390 1.1 skrll #define elf_backend_finish_dynamic_symbol \
4391 1.1 skrll elf_cris_finish_dynamic_symbol
4392 1.1 skrll #define elf_backend_finish_dynamic_sections \
4393 1.1 skrll elf_cris_finish_dynamic_sections
4394 1.1 skrll #define elf_backend_create_dynamic_sections \
4395 1.1.1.2 christos _bfd_elf_create_dynamic_sections
4396 1.1 skrll #define bfd_elf32_bfd_final_link \
4397 1.1 skrll bfd_elf_gc_common_final_link
4398 1.1 skrll #define elf_backend_hide_symbol elf_cris_hide_symbol
4399 1.1 skrll #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4400 1.1 skrll
4401 1.1 skrll #define elf_backend_want_got_plt 1
4402 1.1 skrll #define elf_backend_plt_readonly 1
4403 1.1 skrll #define elf_backend_want_plt_sym 0
4404 1.1 skrll #define elf_backend_got_header_size 12
4405 1.1 skrll #define elf_backend_got_elt_size elf_cris_got_elt_size
4406 1.1 skrll
4407 1.1 skrll /* Later, we my want to optimize RELA entries into REL entries for dynamic
4408 1.1 skrll linking and libraries (if it's a win of any significance). Until then,
4409 1.1 skrll take the easy route. */
4410 1.1.1.4 christos #define elf_backend_may_use_rel_p 0
4411 1.1 skrll #define elf_backend_may_use_rela_p 1
4412 1.1 skrll #define elf_backend_rela_normal 1
4413 1.1 skrll
4414 1.1 skrll #include "elf32-target.h"
4415 1.1 skrll
4416 1.1 skrll #undef TARGET_LITTLE_SYM
4417 #undef TARGET_LITTLE_NAME
4418 #undef elf_symbol_leading_char
4419
4420 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4421 #define TARGET_LITTLE_NAME "elf32-us-cris"
4422 #define elf_symbol_leading_char '_'
4423 #undef elf32_bed
4424 #define elf32_bed elf32_us_cris_bed
4425
4426 #include "elf32-target.h"
4427