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06c15ad7 | 1 | /* CRIS-specific support for 32-bit ELF. |
915e5146 | 2 | Copyright 2000, 2001 Free Software Foundation, Inc. |
06c15ad7 HPN |
3 | Contributed by Axis Communications AB. |
4 | Written by Hans-Peter Nilsson, based on elf32-fr30.c | |
915e5146 | 5 | PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c. |
06c15ad7 HPN |
6 | |
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/cris.h" | |
28 | ||
29 | /* Forward declarations. */ | |
30 | static reloc_howto_type * cris_reloc_type_lookup | |
31 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
32 | ||
a7c10850 | 33 | static void cris_info_to_howto_rela |
06c15ad7 HPN |
34 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); |
35 | ||
a7c10850 | 36 | static boolean cris_elf_relocate_section |
06c15ad7 HPN |
37 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
38 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
39 | ||
40 | static bfd_reloc_status_type cris_final_link_relocate | |
41 | PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, | |
42 | Elf_Internal_Rela *, bfd_vma)); | |
43 | ||
44 | static boolean cris_elf_gc_sweep_hook | |
45 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
46 | const Elf_Internal_Rela *)); | |
47 | ||
48 | static asection * cris_elf_gc_mark_hook | |
49 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, | |
50 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
51 | ||
4da81684 HPN |
52 | static boolean cris_elf_object_p PARAMS ((bfd *)); |
53 | ||
54 | static void cris_elf_final_write_processing PARAMS ((bfd *, boolean)); | |
55 | ||
56 | static boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR)); | |
57 | ||
58 | static boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); | |
59 | ||
915e5146 | 60 | struct elf_cris_link_hash_entry; |
4d96d128 HPN |
61 | static boolean elf_cris_discard_excess_dso_dynamics |
62 | PARAMS ((struct elf_cris_link_hash_entry *, PTR)); | |
63 | static boolean elf_cris_discard_excess_program_dynamics | |
915e5146 HPN |
64 | PARAMS ((struct elf_cris_link_hash_entry *, PTR)); |
65 | static boolean elf_cris_adjust_gotplt_to_got | |
66 | PARAMS ((struct elf_cris_link_hash_entry *, PTR)); | |
67 | static boolean elf_cris_try_fold_plt_to_got | |
68 | PARAMS ((struct elf_cris_link_hash_entry *, PTR)); | |
69 | static struct bfd_hash_entry *elf_cris_link_hash_newfunc | |
70 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
71 | static struct bfd_link_hash_table *elf_cris_link_hash_table_create | |
72 | PARAMS ((bfd *)); | |
73 | static boolean elf_cris_adjust_dynamic_symbol | |
74 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
99c79b2e AJ |
75 | static boolean cris_elf_check_relocs |
76 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
77 | const Elf_Internal_Rela *)); | |
78 | ||
915e5146 HPN |
79 | static boolean elf_cris_size_dynamic_sections |
80 | PARAMS ((bfd *, struct bfd_link_info *)); | |
81 | static boolean elf_cris_finish_dynamic_symbol | |
82 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
83 | Elf_Internal_Sym *)); | |
84 | static boolean elf_cris_finish_dynamic_sections | |
85 | PARAMS ((bfd *, struct bfd_link_info *)); | |
86 | static void elf_cris_hide_symbol | |
87 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
88 | ||
06c15ad7 HPN |
89 | static reloc_howto_type cris_elf_howto_table [] = |
90 | { | |
91 | /* This reloc does nothing. */ | |
92 | HOWTO (R_CRIS_NONE, /* type */ | |
93 | 0, /* rightshift */ | |
94 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
95 | 32, /* bitsize */ | |
96 | false, /* pc_relative */ | |
97 | 0, /* bitpos */ | |
98 | complain_overflow_bitfield, /* complain_on_overflow */ | |
99 | bfd_elf_generic_reloc, /* special_function */ | |
100 | "R_CRIS_NONE", /* name */ | |
101 | false, /* partial_inplace */ | |
102 | 0, /* src_mask */ | |
103 | 0, /* dst_mask */ | |
104 | false), /* pcrel_offset */ | |
105 | ||
106 | /* An 8 bit absolute relocation. */ | |
107 | HOWTO (R_CRIS_8, /* type */ | |
108 | 0, /* rightshift */ | |
109 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
110 | 8, /* bitsize */ | |
111 | false, /* pc_relative */ | |
112 | 0, /* bitpos */ | |
113 | complain_overflow_bitfield, /* complain_on_overflow */ | |
114 | bfd_elf_generic_reloc, /* special_function */ | |
115 | "R_CRIS_8", /* name */ | |
116 | false, /* partial_inplace */ | |
117 | 0x0000, /* src_mask */ | |
118 | 0x00ff, /* dst_mask */ | |
119 | false), /* pcrel_offset */ | |
120 | ||
121 | /* A 16 bit absolute relocation. */ | |
122 | HOWTO (R_CRIS_16, /* type */ | |
123 | 0, /* rightshift */ | |
124 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
125 | 16, /* bitsize */ | |
126 | false, /* pc_relative */ | |
127 | 0, /* bitpos */ | |
128 | complain_overflow_bitfield, /* complain_on_overflow */ | |
129 | bfd_elf_generic_reloc, /* special_function */ | |
130 | "R_CRIS_16", /* name */ | |
131 | false, /* partial_inplace */ | |
132 | 0x00000000, /* src_mask */ | |
133 | 0x0000ffff, /* dst_mask */ | |
134 | false), /* pcrel_offset */ | |
135 | ||
136 | /* A 32 bit absolute relocation. */ | |
137 | HOWTO (R_CRIS_32, /* type */ | |
138 | 0, /* rightshift */ | |
139 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
140 | 32, /* bitsize */ | |
141 | false, /* pc_relative */ | |
142 | 0, /* bitpos */ | |
143 | complain_overflow_bitfield, /* complain_on_overflow */ | |
144 | bfd_elf_generic_reloc, /* special_function */ | |
145 | "R_CRIS_32", /* name */ | |
146 | false, /* partial_inplace */ | |
147 | 0x00000000, /* src_mask */ | |
148 | 0xffffffff, /* dst_mask */ | |
149 | false), /* pcrel_offset */ | |
150 | ||
915e5146 | 151 | /* An 8 bit PC-relative relocation. */ |
06c15ad7 HPN |
152 | HOWTO (R_CRIS_8_PCREL, /* type */ |
153 | 0, /* rightshift */ | |
154 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 8, /* bitsize */ | |
156 | true, /* pc_relative */ | |
157 | 0, /* bitpos */ | |
158 | complain_overflow_bitfield, /* complain_on_overflow */ | |
159 | bfd_elf_generic_reloc, /* special_function */ | |
160 | "R_CRIS_8_PCREL", /* name */ | |
161 | false, /* partial_inplace */ | |
162 | 0x0000, /* src_mask */ | |
163 | 0x00ff, /* dst_mask */ | |
915e5146 | 164 | true), /* pcrel_offset */ |
06c15ad7 | 165 | |
915e5146 | 166 | /* A 16 bit PC-relative relocation. */ |
06c15ad7 HPN |
167 | HOWTO (R_CRIS_16_PCREL, /* type */ |
168 | 0, /* rightshift */ | |
169 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
170 | 16, /* bitsize */ | |
171 | true, /* pc_relative */ | |
172 | 0, /* bitpos */ | |
173 | complain_overflow_bitfield, /* complain_on_overflow */ | |
174 | bfd_elf_generic_reloc, /* special_function */ | |
175 | "R_CRIS_16", /* name */ | |
176 | false, /* partial_inplace */ | |
177 | 0x00000000, /* src_mask */ | |
178 | 0x0000ffff, /* dst_mask */ | |
915e5146 | 179 | true), /* pcrel_offset */ |
06c15ad7 | 180 | |
915e5146 | 181 | /* A 32 bit PC-relative relocation. */ |
06c15ad7 HPN |
182 | HOWTO (R_CRIS_32_PCREL, /* type */ |
183 | 0, /* rightshift */ | |
184 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
185 | 32, /* bitsize */ | |
186 | true, /* pc_relative */ | |
187 | 0, /* bitpos */ | |
188 | complain_overflow_bitfield, /* complain_on_overflow */ | |
189 | bfd_elf_generic_reloc, /* special_function */ | |
190 | "R_CRIS_32", /* name */ | |
191 | false, /* partial_inplace */ | |
192 | 0x00000000, /* src_mask */ | |
193 | 0xffffffff, /* dst_mask */ | |
915e5146 | 194 | true), /* pcrel_offset */ |
06c15ad7 | 195 | |
915e5146 HPN |
196 | /* GNU extension to record C++ vtable hierarchy. */ |
197 | HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ | |
06c15ad7 HPN |
198 | 0, /* rightshift */ |
199 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
200 | 0, /* bitsize */ | |
201 | false, /* pc_relative */ | |
202 | 0, /* bitpos */ | |
203 | complain_overflow_dont, /* complain_on_overflow */ | |
204 | NULL, /* special_function */ | |
205 | "R_CRIS_GNU_VTINHERIT", /* name */ | |
206 | false, /* partial_inplace */ | |
207 | 0, /* src_mask */ | |
208 | 0, /* dst_mask */ | |
209 | false), /* pcrel_offset */ | |
210 | ||
915e5146 HPN |
211 | /* GNU extension to record C++ vtable member usage. */ |
212 | HOWTO (R_CRIS_GNU_VTENTRY, /* type */ | |
06c15ad7 HPN |
213 | 0, /* rightshift */ |
214 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
215 | 0, /* bitsize */ | |
216 | false, /* pc_relative */ | |
217 | 0, /* bitpos */ | |
218 | complain_overflow_dont, /* complain_on_overflow */ | |
219 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
220 | "R_CRIS_GNU_VTENTRY", /* name */ | |
221 | false, /* partial_inplace */ | |
222 | 0, /* src_mask */ | |
223 | 0, /* dst_mask */ | |
915e5146 HPN |
224 | false), /* pcrel_offset */ |
225 | ||
226 | /* This is used only by the dynamic linker. The symbol should exist | |
227 | both in the object being run and in some shared library. The | |
228 | dynamic linker copies the data addressed by the symbol from the | |
229 | shared library into the object, because the object being | |
230 | run has to have the data at some particular address. */ | |
231 | HOWTO (R_CRIS_COPY, /* type */ | |
232 | 0, /* rightshift */ | |
233 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
234 | 32, /* bitsize */ | |
235 | false, /* pc_relative */ | |
236 | 0, /* bitpos */ | |
237 | complain_overflow_bitfield, /* complain_on_overflow */ | |
238 | bfd_elf_generic_reloc, /* special_function */ | |
239 | "R_CRIS_COPY", /* name */ | |
240 | false, /* partial_inplace */ | |
241 | 0, /* src_mask */ | |
242 | 0, /* dst_mask */ | |
243 | false), /* pcrel_offset */ | |
244 | ||
245 | /* Like R_CRIS_32, but used when setting global offset table entries. */ | |
246 | HOWTO (R_CRIS_GLOB_DAT, /* type */ | |
247 | 0, /* rightshift */ | |
248 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
249 | 32, /* bitsize */ | |
250 | false, /* pc_relative */ | |
251 | 0, /* bitpos */ | |
252 | complain_overflow_bitfield, /* complain_on_overflow */ | |
253 | bfd_elf_generic_reloc, /* special_function */ | |
254 | "R_CRIS_GLOB_DAT", /* name */ | |
255 | false, /* partial_inplace */ | |
256 | 0, /* src_mask */ | |
257 | 0xffffffff, /* dst_mask */ | |
258 | false), /* pcrel_offset */ | |
259 | ||
260 | /* Marks a procedure linkage table entry for a symbol. */ | |
261 | HOWTO (R_CRIS_JUMP_SLOT, /* type */ | |
262 | 0, /* rightshift */ | |
263 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
264 | 32, /* bitsize */ | |
265 | false, /* pc_relative */ | |
266 | 0, /* bitpos */ | |
267 | complain_overflow_bitfield, /* complain_on_overflow */ | |
268 | bfd_elf_generic_reloc, /* special_function */ | |
269 | "R_CRIS_JUMP_SLOT", /* name */ | |
270 | false, /* partial_inplace */ | |
271 | 0, /* src_mask */ | |
272 | 0, /* dst_mask */ | |
273 | false), /* pcrel_offset */ | |
274 | ||
275 | /* Used only by the dynamic linker. When the object is run, this | |
276 | longword is set to the load address of the object, plus the | |
277 | addend. */ | |
278 | HOWTO (R_CRIS_RELATIVE, /* type */ | |
279 | 0, /* rightshift */ | |
280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
281 | 32, /* bitsize */ | |
282 | false, /* pc_relative */ | |
283 | 0, /* bitpos */ | |
284 | complain_overflow_bitfield, /* complain_on_overflow */ | |
285 | bfd_elf_generic_reloc, /* special_function */ | |
286 | "R_CRIS_RELATIVE", /* name */ | |
287 | false, /* partial_inplace */ | |
288 | 0, /* src_mask */ | |
289 | 0xffffffff, /* dst_mask */ | |
290 | false), /* pcrel_offset */ | |
291 | ||
292 | /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */ | |
293 | HOWTO (R_CRIS_16_GOT, /* type */ | |
294 | 0, /* rightshift */ | |
295 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
296 | 16, /* bitsize */ | |
297 | false, /* pc_relative */ | |
298 | 0, /* bitpos */ | |
299 | complain_overflow_bitfield, /* complain_on_overflow */ | |
300 | bfd_elf_generic_reloc, /* special_function */ | |
301 | "R_CRIS_16_GOT", /* name */ | |
302 | false, /* partial_inplace */ | |
303 | 0, /* src_mask */ | |
304 | 0xffff, /* dst_mask */ | |
305 | false), /* pcrel_offset */ | |
306 | ||
307 | HOWTO (R_CRIS_32_GOT, /* type */ | |
308 | 0, /* rightshift */ | |
309 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
310 | 32, /* bitsize */ | |
311 | false, /* pc_relative */ | |
312 | 0, /* bitpos */ | |
313 | complain_overflow_bitfield, /* complain_on_overflow */ | |
314 | bfd_elf_generic_reloc, /* special_function */ | |
315 | "R_CRIS_32_GOT", /* name */ | |
316 | false, /* partial_inplace */ | |
317 | 0, /* src_mask */ | |
318 | 0xffffffff, /* dst_mask */ | |
319 | false), /* pcrel_offset */ | |
320 | ||
321 | /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of | |
322 | the GOT table for the symbol. */ | |
323 | HOWTO (R_CRIS_16_GOTPLT, /* type */ | |
324 | 0, /* rightshift */ | |
325 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
326 | 16, /* bitsize */ | |
327 | false, /* pc_relative */ | |
328 | 0, /* bitpos */ | |
329 | complain_overflow_bitfield, /* complain_on_overflow */ | |
330 | bfd_elf_generic_reloc, /* special_function */ | |
331 | "R_CRIS_16_GOTPLT", /* name */ | |
332 | false, /* partial_inplace */ | |
333 | 0, /* src_mask */ | |
334 | 0xffff, /* dst_mask */ | |
335 | false), /* pcrel_offset */ | |
336 | ||
337 | HOWTO (R_CRIS_32_GOTPLT, /* type */ | |
338 | 0, /* rightshift */ | |
339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
340 | 32, /* bitsize */ | |
341 | false, /* pc_relative */ | |
342 | 0, /* bitpos */ | |
343 | complain_overflow_bitfield, /* complain_on_overflow */ | |
344 | bfd_elf_generic_reloc, /* special_function */ | |
345 | "R_CRIS_32_GOTPLT", /* name */ | |
346 | false, /* partial_inplace */ | |
347 | 0, /* src_mask */ | |
348 | 0xffffffff, /* dst_mask */ | |
349 | false), /* pcrel_offset */ | |
350 | ||
351 | /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should | |
352 | be necessary. */ | |
353 | HOWTO (R_CRIS_32_GOTREL, /* type */ | |
354 | 0, /* rightshift */ | |
355 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
356 | 32, /* bitsize */ | |
357 | false, /* pc_relative */ | |
358 | 0, /* bitpos */ | |
359 | complain_overflow_bitfield, /* complain_on_overflow */ | |
360 | bfd_elf_generic_reloc, /* special_function */ | |
361 | "R_CRIS_32_GOTREL", /* name */ | |
362 | false, /* partial_inplace */ | |
363 | 0, /* src_mask */ | |
364 | 0xffffffff, /* dst_mask */ | |
365 | false), /* pcrel_offset */ | |
366 | ||
367 | /* A 32-bit offset from GOT to entry for this symbol in PLT and request | |
368 | to create PLT entry for symbol. */ | |
369 | HOWTO (R_CRIS_32_PLT_GOTREL, /* type */ | |
370 | 0, /* rightshift */ | |
371 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
372 | 32, /* bitsize */ | |
373 | false, /* pc_relative */ | |
374 | 0, /* bitpos */ | |
375 | complain_overflow_bitfield, /* complain_on_overflow */ | |
376 | bfd_elf_generic_reloc, /* special_function */ | |
377 | "R_CRIS_32_PLT_GOTREL", /* name */ | |
378 | false, /* partial_inplace */ | |
379 | 0, /* src_mask */ | |
380 | 0xffffffff, /* dst_mask */ | |
381 | false), /* pcrel_offset */ | |
382 | ||
383 | /* A 32-bit offset from PC (location after the relocation) + addend to | |
384 | entry for this symbol in PLT and request to create PLT entry for | |
385 | symbol. */ | |
386 | HOWTO (R_CRIS_32_PLT_PCREL, /* type */ | |
387 | 0, /* rightshift */ | |
388 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
389 | 32, /* bitsize */ | |
390 | true, /* pc_relative */ | |
391 | 0, /* bitpos */ | |
392 | complain_overflow_bitfield, /* complain_on_overflow */ | |
393 | bfd_elf_generic_reloc, /* special_function */ | |
394 | "R_CRIS_32_PLT_PCREL", /* name */ | |
395 | false, /* partial_inplace */ | |
396 | 0, /* src_mask */ | |
397 | 0xffffffff, /* dst_mask */ | |
398 | true) /* pcrel_offset */ | |
06c15ad7 HPN |
399 | }; |
400 | \f | |
401 | /* Map BFD reloc types to CRIS ELF reloc types. */ | |
402 | ||
403 | struct cris_reloc_map | |
404 | { | |
405 | bfd_reloc_code_real_type bfd_reloc_val; | |
406 | unsigned int cris_reloc_val; | |
407 | }; | |
408 | ||
409 | static const struct cris_reloc_map cris_reloc_map [] = | |
410 | { | |
411 | { BFD_RELOC_NONE, R_CRIS_NONE }, | |
412 | { BFD_RELOC_8, R_CRIS_8 }, | |
413 | { BFD_RELOC_16, R_CRIS_16 }, | |
414 | { BFD_RELOC_32, R_CRIS_32 }, | |
415 | { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL }, | |
416 | { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL }, | |
417 | { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL }, | |
418 | { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT }, | |
915e5146 HPN |
419 | { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY }, |
420 | { BFD_RELOC_CRIS_COPY, R_CRIS_COPY }, | |
421 | { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT }, | |
422 | { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT }, | |
423 | { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE }, | |
424 | { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT }, | |
425 | { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT }, | |
426 | { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT }, | |
427 | { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT }, | |
428 | { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL }, | |
429 | { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL }, | |
430 | { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL } | |
06c15ad7 HPN |
431 | }; |
432 | ||
433 | static reloc_howto_type * | |
434 | cris_reloc_type_lookup (abfd, code) | |
435 | bfd * abfd ATTRIBUTE_UNUSED; | |
436 | bfd_reloc_code_real_type code; | |
437 | { | |
438 | unsigned int i; | |
439 | ||
440 | for (i = sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); | |
441 | --i;) | |
442 | if (cris_reloc_map [i].bfd_reloc_val == code) | |
443 | return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val]; | |
a7c10850 | 444 | |
06c15ad7 HPN |
445 | return NULL; |
446 | } | |
447 | ||
448 | /* Set the howto pointer for an CRIS ELF reloc. */ | |
449 | ||
450 | static void | |
451 | cris_info_to_howto_rela (abfd, cache_ptr, dst) | |
452 | bfd * abfd ATTRIBUTE_UNUSED; | |
453 | arelent * cache_ptr; | |
454 | Elf32_Internal_Rela * dst; | |
455 | { | |
456 | unsigned int r_type; | |
457 | ||
458 | r_type = ELF32_R_TYPE (dst->r_info); | |
459 | BFD_ASSERT (r_type < (unsigned int) R_CRIS_max); | |
460 | cache_ptr->howto = & cris_elf_howto_table [r_type]; | |
461 | } | |
462 | \f | |
915e5146 HPN |
463 | /* The name of the dynamic interpreter. This is put in the .interp |
464 | section. */ | |
465 | ||
466 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
467 | ||
468 | /* The size in bytes of an entry in the procedure linkage table. */ | |
469 | ||
470 | #define PLT_ENTRY_SIZE 20 | |
471 | ||
472 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
473 | ||
474 | static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] = | |
475 | { | |
476 | 0xfc, 0xe1, | |
477 | 0x7e, 0x7e, /* push mof. */ | |
478 | 0x7f, 0x0d, /* (dip [pc+]) */ | |
479 | 0, 0, 0, 0, /* Replaced with address of .got + 4. */ | |
480 | 0x30, 0x7a, /* move [...],mof */ | |
481 | 0x7f, 0x0d, /* (dip [pc+]) */ | |
482 | 0, 0, 0, 0, /* Replaced with address of .got + 8. */ | |
483 | 0x30, 0x09, /* jump [...] */ | |
484 | }; | |
485 | ||
486 | /* Subsequent entries in an absolute procedure linkage table look like | |
487 | this. */ | |
488 | ||
489 | static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] = | |
490 | { | |
491 | 0x7f, 0x0d, /* (dip [pc+]) */ | |
492 | 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ | |
493 | 0x30, 0x09, /* jump [...] */ | |
494 | 0x3f, 0x7e, /* move [pc+],mof */ | |
495 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ | |
496 | 0x2f, 0xfe, /* add.d [pc+],pc */ | |
497 | 0xec, 0xff, | |
498 | 0xff, 0xff /* Replaced with offset to start of .plt. */ | |
499 | }; | |
500 | ||
501 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
502 | ||
503 | static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] = | |
504 | { | |
505 | 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */ | |
506 | 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */ | |
507 | 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */ | |
508 | 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */ | |
509 | }; | |
510 | ||
511 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
512 | ||
513 | static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] = | |
514 | { | |
515 | 0x6f, 0x0d, /* (bdap [pc+].d,r0) */ | |
516 | 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ | |
517 | 0x30, 0x09, /* jump [...] */ | |
518 | 0x3f, 0x7e, /* move [pc+],mof */ | |
519 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ | |
520 | 0x2f, 0xfe, /* add.d [pc+],pc */ | |
521 | 0xec, 0xff, /* Replaced with offset to start of .plt. */ | |
522 | 0xff, 0xff | |
523 | }; | |
524 | \f | |
525 | /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits | |
526 | (and most other PIC/shlib stuff). Check that we don't drift away | |
527 | without reason. | |
528 | ||
529 | The CRIS linker, like the m68k and i386 linkers (and probably the rest | |
530 | too) needs to keep track of the number of relocs that it decides to | |
531 | copy in check_relocs for each symbol. This is so that it can discard | |
532 | PC relative relocs if it doesn't need them when linking with | |
533 | -Bsymbolic. We store the information in a field extending the regular | |
534 | ELF linker hash table. */ | |
535 | ||
536 | /* This structure keeps track of the number of PC relative relocs we have | |
537 | copied for a given symbol. */ | |
538 | ||
539 | struct elf_cris_pcrel_relocs_copied | |
540 | { | |
541 | /* Next section. */ | |
542 | struct elf_cris_pcrel_relocs_copied *next; | |
543 | /* A section in dynobj. */ | |
544 | asection *section; | |
545 | /* Number of relocs copied in this section. */ | |
546 | bfd_size_type count; | |
547 | }; | |
548 | ||
549 | /* CRIS ELF linker hash entry. */ | |
550 | ||
551 | struct elf_cris_link_hash_entry | |
552 | { | |
553 | struct elf_link_hash_entry root; | |
554 | ||
555 | /* Number of PC relative relocs copied for this symbol. */ | |
556 | struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied; | |
557 | ||
558 | /* The GOTPLT references are CRIS-specific; the goal is to avoid having | |
559 | both a general GOT and a PLT-specific GOT entry for the same symbol, | |
560 | when it is referenced both as a function and as a function pointer. | |
561 | ||
562 | Number of GOTPLT references for a function. */ | |
563 | bfd_signed_vma gotplt_refcount; | |
564 | ||
565 | /* Actual GOTPLT index for this symbol, if applicable, or zero if not | |
566 | (zero is never used as an index). FIXME: We should be able to fold | |
567 | this with gotplt_refcount in a union, like the got and plt unions in | |
568 | elf_link_hash_entry. */ | |
569 | bfd_size_type gotplt_offset; | |
570 | }; | |
571 | ||
572 | /* CRIS ELF linker hash table. */ | |
573 | ||
574 | struct elf_cris_link_hash_table | |
575 | { | |
576 | struct elf_link_hash_table root; | |
577 | ||
578 | /* We can't use the PLT offset and calculate to get the GOTPLT offset, | |
579 | since we try and avoid creating GOTPLT:s when there's already a GOT. | |
580 | Instead, we keep and update the next available index here. */ | |
581 | bfd_size_type next_gotplt_entry; | |
582 | }; | |
583 | ||
584 | /* Traverse a CRIS ELF linker hash table. */ | |
585 | ||
586 | #define elf_cris_link_hash_traverse(table, func, info) \ | |
587 | (elf_link_hash_traverse \ | |
588 | (&(table)->root, \ | |
589 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
590 | (info))) | |
591 | ||
592 | /* Get the CRIS ELF linker hash table from a link_info structure. */ | |
593 | ||
594 | #define elf_cris_hash_table(p) \ | |
595 | ((struct elf_cris_link_hash_table *) (p)->hash) | |
596 | ||
597 | /* Create an entry in a CRIS ELF linker hash table. */ | |
598 | ||
599 | static struct bfd_hash_entry * | |
600 | elf_cris_link_hash_newfunc (entry, table, string) | |
601 | struct bfd_hash_entry *entry; | |
602 | struct bfd_hash_table *table; | |
603 | const char *string; | |
604 | { | |
605 | struct elf_cris_link_hash_entry *ret = | |
606 | (struct elf_cris_link_hash_entry *) entry; | |
607 | ||
608 | /* Allocate the structure if it has not already been allocated by a | |
609 | subclass. */ | |
610 | if (ret == (struct elf_cris_link_hash_entry *) NULL) | |
611 | ret = ((struct elf_cris_link_hash_entry *) | |
612 | bfd_hash_allocate (table, | |
613 | sizeof (struct elf_cris_link_hash_entry))); | |
614 | if (ret == (struct elf_cris_link_hash_entry *) NULL) | |
615 | return (struct bfd_hash_entry *) ret; | |
616 | ||
617 | /* Call the allocation method of the superclass. */ | |
618 | ret = ((struct elf_cris_link_hash_entry *) | |
619 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
620 | table, string)); | |
621 | if (ret != (struct elf_cris_link_hash_entry *) NULL) | |
622 | { | |
623 | ret->pcrel_relocs_copied = NULL; | |
624 | ret->gotplt_refcount = 0; | |
625 | ret->gotplt_offset = 0; | |
626 | } | |
627 | ||
628 | return (struct bfd_hash_entry *) ret; | |
629 | } | |
630 | ||
631 | /* Create a CRIS ELF linker hash table. */ | |
632 | ||
633 | static struct bfd_link_hash_table * | |
634 | elf_cris_link_hash_table_create (abfd) | |
635 | bfd *abfd; | |
636 | { | |
637 | struct elf_cris_link_hash_table *ret; | |
638 | ||
639 | ret = ((struct elf_cris_link_hash_table *) | |
640 | bfd_alloc (abfd, sizeof (struct elf_cris_link_hash_table))); | |
641 | if (ret == (struct elf_cris_link_hash_table *) NULL) | |
642 | return NULL; | |
643 | ||
644 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
645 | elf_cris_link_hash_newfunc)) | |
646 | { | |
647 | bfd_release (abfd, ret); | |
648 | return NULL; | |
649 | } | |
650 | ||
651 | /* Initialize to skip over the first three entries in the gotplt; they | |
652 | are used for run-time symbol evaluation. */ | |
653 | ret->next_gotplt_entry = 12; | |
654 | ||
655 | return &ret->root.root; | |
656 | } | |
657 | \f | |
06c15ad7 | 658 | /* Perform a single relocation. By default we use the standard BFD |
915e5146 | 659 | routines, with a few tweaks. */ |
06c15ad7 HPN |
660 | |
661 | static bfd_reloc_status_type | |
662 | cris_final_link_relocate (howto, input_bfd, input_section, contents, rel, | |
663 | relocation) | |
664 | reloc_howto_type * howto; | |
665 | bfd * input_bfd; | |
666 | asection * input_section; | |
667 | bfd_byte * contents; | |
668 | Elf_Internal_Rela * rel; | |
669 | bfd_vma relocation; | |
670 | { | |
915e5146 HPN |
671 | bfd_reloc_status_type r; |
672 | ||
673 | /* PC-relative relocations are relative to the position *after* | |
674 | the reloc. Note that for R_CRIS_8_PCREL the adjustment is | |
675 | not a single byte, since PC must be 16-bit-aligned. */ | |
676 | switch (ELF32_R_TYPE (rel->r_info)) | |
677 | { | |
678 | /* Check that the 16-bit GOT relocs are positive. */ | |
679 | case R_CRIS_16_GOTPLT: | |
680 | case R_CRIS_16_GOT: | |
681 | if ((bfd_signed_vma) relocation < 0) | |
682 | return bfd_reloc_overflow; | |
683 | break; | |
684 | ||
685 | case R_CRIS_32_PLT_PCREL: | |
686 | case R_CRIS_32_PCREL: | |
687 | relocation -= 2; | |
688 | /* Fall through. */ | |
689 | case R_CRIS_8_PCREL: | |
690 | case R_CRIS_16_PCREL: | |
691 | relocation -= 2; | |
692 | break; | |
693 | ||
694 | default: | |
695 | break; | |
696 | } | |
697 | ||
698 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
06c15ad7 HPN |
699 | contents, rel->r_offset, |
700 | relocation, rel->r_addend); | |
701 | return r; | |
702 | } | |
703 | \f | |
704 | /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was | |
705 | copied, for further comments. */ | |
706 | ||
707 | static boolean | |
708 | cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
709 | contents, relocs, local_syms, local_sections) | |
710 | bfd * output_bfd ATTRIBUTE_UNUSED; | |
711 | struct bfd_link_info * info; | |
712 | bfd * input_bfd; | |
713 | asection * input_section; | |
714 | bfd_byte * contents; | |
715 | Elf_Internal_Rela * relocs; | |
716 | Elf_Internal_Sym * local_syms; | |
717 | asection ** local_sections; | |
718 | { | |
915e5146 | 719 | bfd *dynobj; |
06c15ad7 HPN |
720 | Elf_Internal_Shdr * symtab_hdr; |
721 | struct elf_link_hash_entry ** sym_hashes; | |
915e5146 HPN |
722 | bfd_vma *local_got_offsets; |
723 | asection *sgot; | |
724 | asection *splt; | |
725 | asection *sreloc; | |
06c15ad7 HPN |
726 | Elf_Internal_Rela * rel; |
727 | Elf_Internal_Rela * relend; | |
728 | ||
915e5146 HPN |
729 | dynobj = elf_hash_table (info)->dynobj; |
730 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
06c15ad7 HPN |
731 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
732 | sym_hashes = elf_sym_hashes (input_bfd); | |
733 | relend = relocs + input_section->reloc_count; | |
734 | ||
735 | /* It seems this can happen with erroneous or unsupported input (mixing | |
736 | a.out and elf in an archive, for example.) */ | |
737 | if (sym_hashes == NULL) | |
738 | return false; | |
739 | ||
915e5146 HPN |
740 | sgot = NULL; |
741 | splt = NULL; | |
742 | sreloc = NULL; | |
743 | ||
744 | if (dynobj != NULL) | |
745 | { | |
746 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
747 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
748 | } | |
749 | ||
06c15ad7 HPN |
750 | for (rel = relocs; rel < relend; rel ++) |
751 | { | |
752 | reloc_howto_type * howto; | |
753 | unsigned long r_symndx; | |
754 | Elf_Internal_Sym * sym; | |
755 | asection * sec; | |
756 | struct elf_link_hash_entry * h; | |
757 | bfd_vma relocation; | |
758 | bfd_reloc_status_type r; | |
759 | const char * name = NULL; | |
760 | int r_type; | |
a7c10850 | 761 | |
06c15ad7 | 762 | r_type = ELF32_R_TYPE (rel->r_info); |
a7c10850 | 763 | |
06c15ad7 HPN |
764 | if ( r_type == R_CRIS_GNU_VTINHERIT |
765 | || r_type == R_CRIS_GNU_VTENTRY) | |
766 | continue; | |
a7c10850 | 767 | |
06c15ad7 HPN |
768 | r_symndx = ELF32_R_SYM (rel->r_info); |
769 | ||
770 | if (info->relocateable) | |
771 | { | |
772 | /* This is a relocateable link. We don't have to change | |
773 | anything, unless the reloc is against a section symbol, | |
774 | in which case we have to adjust according to where the | |
775 | section symbol winds up in the output section. */ | |
776 | if (r_symndx < symtab_hdr->sh_info) | |
777 | { | |
778 | sym = local_syms + r_symndx; | |
a7c10850 | 779 | |
06c15ad7 HPN |
780 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
781 | { | |
782 | sec = local_sections [r_symndx]; | |
783 | rel->r_addend += sec->output_offset + sym->st_value; | |
784 | } | |
785 | } | |
786 | ||
787 | continue; | |
788 | } | |
789 | ||
790 | /* This is a final link. */ | |
915e5146 | 791 | howto = cris_elf_howto_table + r_type; |
06c15ad7 HPN |
792 | h = NULL; |
793 | sym = NULL; | |
794 | sec = NULL; | |
a7c10850 | 795 | |
06c15ad7 HPN |
796 | if (r_symndx < symtab_hdr->sh_info) |
797 | { | |
798 | sym = local_syms + r_symndx; | |
799 | sec = local_sections [r_symndx]; | |
800 | relocation = (sec->output_section->vma | |
801 | + sec->output_offset | |
802 | + sym->st_value); | |
a7c10850 | 803 | |
06c15ad7 HPN |
804 | name = bfd_elf_string_from_elf_section |
805 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
806 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
06c15ad7 HPN |
807 | } |
808 | else | |
809 | { | |
810 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
a7c10850 | 811 | |
06c15ad7 HPN |
812 | while (h->root.type == bfd_link_hash_indirect |
813 | || h->root.type == bfd_link_hash_warning) | |
814 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
815 | ||
816 | name = h->root.root.string; | |
a7c10850 | 817 | |
06c15ad7 HPN |
818 | if (h->root.type == bfd_link_hash_defined |
819 | || h->root.type == bfd_link_hash_defweak) | |
820 | { | |
821 | sec = h->root.u.def.section; | |
915e5146 HPN |
822 | |
823 | /* Perhaps we should detect the cases that | |
824 | sec->output_section is expected to be NULL like i386 and | |
825 | m68k, but apparently (and according to elfxx-ia64.c) all | |
826 | valid cases are where the symbol is defined in a shared | |
827 | object which we link dynamically against. This includes | |
828 | PLT relocs for which we've created a PLT entry and other | |
829 | relocs for which we're prepared to create dynamic | |
830 | relocations. | |
831 | ||
832 | For now, new situations cause us to just err when | |
833 | sec->output_offset is NULL but the object with the symbol | |
834 | is *not* dynamically linked against. Thus this will | |
835 | automatically remind us so we can see if there are other | |
836 | valid cases we need to revisit. */ | |
837 | if ((sec->output_section == NULL | |
838 | && (sec->owner->flags & DYNAMIC) != 0) | |
839 | ||
840 | /* Here follow the cases where the relocation value must | |
841 | be zero (or when further handling is simplified when | |
842 | zero). I can't claim to understand the various | |
843 | conditions and they weren't described in the files | |
844 | where I copied them from (elf32-m68k.c and | |
845 | elf32-i386.c), but let's mention examples of where | |
846 | they happen. FIXME: Perhaps define and use a | |
847 | dynamic_symbol_p function like ia64. | |
848 | ||
849 | - When creating a shared library, we can have an | |
850 | ordinary relocation for a symbol defined in a shared | |
851 | library (perhaps the one we create). We then make | |
852 | the relocation value zero, as the value seen now will | |
853 | be added into the relocation addend in this shared | |
854 | library, but must be handled only at dynamic-link | |
855 | time. FIXME: Not sure this example covers the | |
856 | h->elf_link_hash_flags test, though it's there in | |
857 | other targets. */ | |
858 | || (info->shared | |
859 | && ((! info->symbolic && h->dynindx != -1) | |
860 | || (h->elf_link_hash_flags | |
861 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
862 | && (input_section->flags & SEC_ALLOC) != 0 | |
863 | && (r_type == R_CRIS_8 | |
864 | || r_type == R_CRIS_16 | |
865 | || r_type == R_CRIS_32 | |
866 | || r_type == R_CRIS_8_PCREL | |
867 | || r_type == R_CRIS_16_PCREL | |
868 | || r_type == R_CRIS_32_PCREL))) | |
869 | relocation = 0; | |
870 | else if (sec->output_section != NULL) | |
871 | relocation = (h->root.u.def.value | |
872 | + sec->output_section->vma | |
873 | + sec->output_offset); | |
874 | else | |
875 | { | |
876 | if (input_bfd->my_archive) | |
877 | (*_bfd_error_handler) | |
878 | (_("%s(%s): unresolvable relocation %s against symbol `%s' from %s section"), | |
879 | bfd_get_filename (bfd_my_archive (input_bfd)), | |
880 | bfd_get_filename (input_bfd), | |
881 | cris_elf_howto_table[r_type].name, | |
882 | name, | |
883 | bfd_get_section_name (input_bfd, input_section)); | |
884 | else | |
885 | (*_bfd_error_handler) | |
886 | (_("%s: unresolvable relocation %s against symbol `%s' from %s section"), | |
887 | bfd_get_filename (input_bfd), | |
888 | cris_elf_howto_table[r_type].name, | |
889 | name, | |
890 | bfd_get_section_name (input_bfd, input_section)); | |
891 | bfd_set_error (bfd_error_bad_value); | |
892 | return false; | |
893 | } | |
06c15ad7 HPN |
894 | } |
895 | else if (h->root.type == bfd_link_hash_undefweak) | |
915e5146 | 896 | relocation = 0; |
06c15ad7 | 897 | else if (info->shared |
915e5146 HPN |
898 | && !info->symbolic |
899 | && !info->no_undefined | |
06c15ad7 HPN |
900 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
901 | relocation = 0; | |
902 | else | |
903 | { | |
915e5146 HPN |
904 | if (!(info->callbacks->undefined_symbol |
905 | (info, name, input_bfd, | |
906 | input_section, rel->r_offset, | |
907 | (!info->shared || info->no_undefined | |
908 | || ELF_ST_VISIBILITY (h->other))))) | |
06c15ad7 | 909 | return false; |
06c15ad7 HPN |
910 | relocation = 0; |
911 | } | |
912 | } | |
a7c10850 | 913 | |
915e5146 | 914 | switch (r_type) |
06c15ad7 | 915 | { |
915e5146 HPN |
916 | case R_CRIS_16_GOTPLT: |
917 | case R_CRIS_32_GOTPLT: | |
918 | /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT, | |
919 | but we require a PLT, and the PLT handling will take care of | |
920 | filling in the PLT-specific GOT entry. For the GOT offset, | |
921 | calculate it as we do when filling it in for the .got.plt | |
922 | section. If we don't have a PLT, punt to GOT handling. */ | |
923 | if (h != NULL | |
924 | && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0) | |
06c15ad7 | 925 | { |
915e5146 HPN |
926 | asection *sgotplt |
927 | = bfd_get_section_by_name (dynobj, ".got.plt"); | |
928 | bfd_vma got_offset; | |
a7c10850 | 929 | |
915e5146 HPN |
930 | BFD_ASSERT (h->dynindx != -1); |
931 | BFD_ASSERT (sgotplt != NULL); | |
a7c10850 | 932 | |
915e5146 HPN |
933 | got_offset |
934 | = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; | |
06c15ad7 | 935 | |
915e5146 | 936 | relocation = got_offset; |
06c15ad7 | 937 | break; |
915e5146 | 938 | } |
06c15ad7 | 939 | |
4d96d128 | 940 | /* We didn't make a PLT entry for this symbol. Maybe everything is |
915e5146 HPN |
941 | folded into the GOT. Other than folding, this happens when |
942 | statically linking PIC code, or when using -Bsymbolic. Check | |
943 | that we instead have a GOT entry as done for us by | |
944 | elf_cris_adjust_dynamic_symbol, and drop through into the | |
945 | ordinary GOT cases. */ | |
946 | if (h != NULL && h->got.offset == (bfd_vma) -1) | |
947 | { | |
948 | (*_bfd_error_handler) | |
949 | (_("%s: No PLT nor GOT for relocation %s against symbol `%s' from %s section"), | |
950 | bfd_get_filename (input_bfd), | |
951 | cris_elf_howto_table[r_type].name, | |
952 | name[0] != '\0' ? name : _("[whose name is lost]"), | |
953 | bfd_get_section_name (input_bfd, input_section)); | |
954 | ||
955 | /* FIXME: Perhaps blaming input is not the right thing to | |
956 | do; this is probably an internal error. But it is true | |
957 | that we didn't like that particular input. */ | |
958 | bfd_set_error (bfd_error_bad_value); | |
959 | return false; | |
960 | } | |
961 | /* Fall through. */ | |
962 | ||
963 | /* The size of the actual relocation is not used here; we only | |
964 | fill in the GOT table here. */ | |
965 | case R_CRIS_16_GOT: | |
966 | case R_CRIS_32_GOT: | |
967 | { | |
968 | bfd_vma off; | |
969 | ||
970 | /* Note that despite using RELA relocations, the .got contents | |
971 | is always filled in with the link-relative relocation | |
972 | value; the addend. */ | |
973 | ||
974 | if (h != NULL) | |
975 | { | |
976 | off = h->got.offset; | |
977 | BFD_ASSERT (off != (bfd_vma) -1); | |
978 | ||
979 | if (!elf_hash_table (info)->dynamic_sections_created | |
4d96d128 | 980 | || (! info->shared && h->dynindx == -1) |
915e5146 HPN |
981 | || (info->shared |
982 | && (info->symbolic || h->dynindx == -1) | |
983 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
984 | { | |
4d96d128 HPN |
985 | /* This wasn't checked above for ! info->shared, but |
986 | must hold there if we get here; the symbol must not | |
987 | be used in, or defined by a DSO. (Note that | |
988 | checking for ELF_LINK_HASH_DEF_REGULAR doesn't | |
989 | catch all cases.) */ | |
990 | BFD_ASSERT (info->shared | |
991 | || (h->elf_link_hash_flags | |
992 | & (ELF_LINK_HASH_REF_DYNAMIC | |
993 | | ELF_LINK_HASH_DEF_DYNAMIC)) == 0); | |
994 | ||
915e5146 HPN |
995 | /* This is actually a static link, or it is a |
996 | -Bsymbolic link and the symbol is defined | |
997 | locally, or the symbol was forced to be local | |
4d96d128 HPN |
998 | because of a version file, or we're not creating a |
999 | dynamic object and the symbol isn't referred to by | |
1000 | a dynamic object. We must initialize | |
915e5146 HPN |
1001 | this entry in the global offset table. Since |
1002 | the offset must always be a multiple of 4, we | |
1003 | use the least significant bit to record whether | |
1004 | we have initialized it already. | |
1005 | ||
1006 | When doing a dynamic link, we create a .rela.got | |
1007 | relocation entry to initialize the value. This | |
1008 | is done in the finish_dynamic_symbol routine. */ | |
1009 | if ((off & 1) != 0) | |
1010 | off &= ~1; | |
1011 | else | |
1012 | { | |
1013 | bfd_put_32 (output_bfd, relocation, | |
1014 | sgot->contents + off); | |
1015 | h->got.offset |= 1; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | else | |
1020 | { | |
1021 | BFD_ASSERT (local_got_offsets != NULL | |
1022 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1023 | ||
1024 | off = local_got_offsets[r_symndx]; | |
1025 | ||
1026 | /* The offset must always be a multiple of 4. We use | |
1027 | the least significant bit to record whether we have | |
1028 | already generated the necessary reloc. */ | |
1029 | if ((off & 1) != 0) | |
1030 | off &= ~1; | |
1031 | else | |
1032 | { | |
1033 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1034 | ||
1035 | if (info->shared) | |
1036 | { | |
1037 | asection *srelgot; | |
1038 | Elf_Internal_Rela outrel; | |
1039 | ||
1040 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1041 | BFD_ASSERT (srelgot != NULL); | |
1042 | ||
1043 | outrel.r_offset = (sgot->output_section->vma | |
1044 | + sgot->output_offset | |
1045 | + off); | |
1046 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); | |
1047 | outrel.r_addend = relocation; | |
1048 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1049 | (((Elf32_External_Rela *) | |
1050 | srelgot->contents) | |
1051 | + srelgot->reloc_count)); | |
1052 | ++srelgot->reloc_count; | |
1053 | } | |
1054 | ||
1055 | local_got_offsets[r_symndx] |= 1; | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | relocation = sgot->output_offset + off; | |
1060 | if (rel->r_addend != 0) | |
1061 | { | |
1062 | /* We can't do anything for a relocation which is against | |
1063 | a symbol *plus offset*. GOT holds relocations for | |
1064 | symbols. Make this an error; the compiler isn't | |
1065 | allowed to pass us these kinds of things. */ | |
1066 | if (h == NULL) | |
1067 | (*_bfd_error_handler) | |
1068 | (_("%s: relocation %s with non-zero addend %d against local symbol from %s section"), | |
1069 | bfd_get_filename (input_bfd), | |
1070 | cris_elf_howto_table[r_type].name, | |
1071 | rel->r_addend, | |
1072 | bfd_get_section_name (input_bfd, input_section)); | |
1073 | else | |
1074 | (*_bfd_error_handler) | |
1075 | (_("%s: relocation %s with non-zero addend %d against symbol `%s' from %s section"), | |
1076 | bfd_get_filename (input_bfd), | |
1077 | cris_elf_howto_table[r_type].name, | |
1078 | rel->r_addend, | |
1079 | name[0] != '\0' ? name : _("[whose name is lost]"), | |
1080 | bfd_get_section_name (input_bfd, input_section)); | |
1081 | ||
1082 | bfd_set_error (bfd_error_bad_value); | |
1083 | return false; | |
1084 | } | |
1085 | } | |
1086 | break; | |
06c15ad7 | 1087 | |
915e5146 HPN |
1088 | case R_CRIS_32_GOTREL: |
1089 | /* This relocation must only be performed against local symbols. */ | |
1090 | if (h != NULL) | |
1091 | { | |
1092 | (*_bfd_error_handler) | |
1093 | (_("%s: relocation %s is not allowed for global symbol: `%s' from %s section"), | |
1094 | bfd_get_filename (input_bfd), | |
1095 | cris_elf_howto_table[r_type].name, | |
1096 | name, | |
1097 | bfd_get_section_name (input_bfd, input_section)); | |
1098 | bfd_set_error (bfd_error_bad_value); | |
1099 | return false; | |
06c15ad7 HPN |
1100 | } |
1101 | ||
915e5146 HPN |
1102 | /* This relocation is like a PC-relative one, except the |
1103 | reference point is the location of GOT. Note that | |
1104 | sgot->output_offset is not involved in this calculation. We | |
1105 | always want the start of entire .got section, not the | |
1106 | position after the reserved header. */ | |
1107 | relocation -= sgot->output_section->vma; | |
1108 | break; | |
06c15ad7 | 1109 | |
915e5146 HPN |
1110 | case R_CRIS_32_PLT_PCREL: |
1111 | /* Relocation is to the entry for this symbol in the | |
1112 | procedure linkage table. */ | |
06c15ad7 | 1113 | |
915e5146 HPN |
1114 | /* Resolve a PLT_PCREL reloc against a local symbol directly, |
1115 | without using the procedure linkage table. */ | |
1116 | if (h == NULL) | |
1117 | break; | |
1118 | ||
1119 | if (h->plt.offset == (bfd_vma) -1 | |
1120 | || splt == NULL) | |
1121 | { | |
1122 | /* We didn't make a PLT entry for this symbol. This | |
1123 | happens when statically linking PIC code, or when | |
1124 | using -Bsymbolic. */ | |
1125 | break; | |
1126 | } | |
1127 | ||
1128 | relocation = (splt->output_section->vma | |
1129 | + splt->output_offset | |
1130 | + h->plt.offset); | |
1131 | break; | |
1132 | ||
1133 | case R_CRIS_32_PLT_GOTREL: | |
1134 | /* Like R_CRIS_32_PLT_PCREL, but the reference point is the | |
1135 | start of the .got section. See also comment at | |
1136 | R_CRIS_32_GOT. */ | |
1137 | relocation -= sgot->output_section->vma; | |
1138 | ||
1139 | /* Resolve a PLT_GOTREL reloc against a local symbol directly, | |
1140 | without using the procedure linkage table. */ | |
1141 | if (h == NULL) | |
1142 | break; | |
1143 | ||
1144 | if (h->plt.offset == (bfd_vma) -1 | |
1145 | || splt == NULL) | |
1146 | { | |
1147 | /* We didn't make a PLT entry for this symbol. This | |
1148 | happens when statically linking PIC code, or when | |
1149 | using -Bsymbolic. */ | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | relocation = (splt->output_section->vma | |
1154 | + splt->output_offset | |
1155 | + h->plt.offset | |
1156 | - sgot->output_section->vma); | |
1157 | break; | |
1158 | ||
1159 | case R_CRIS_8_PCREL: | |
1160 | case R_CRIS_16_PCREL: | |
1161 | case R_CRIS_32_PCREL: | |
1162 | /* If the symbol was local, we need no shlib-specific handling. */ | |
1163 | if (h == NULL) | |
1164 | break; | |
1165 | ||
1166 | /* Fall through. */ | |
1167 | case R_CRIS_8: | |
1168 | case R_CRIS_16: | |
1169 | case R_CRIS_32: | |
1170 | if (info->shared | |
1171 | && (input_section->flags & SEC_ALLOC) != 0 | |
1172 | && ((r_type != R_CRIS_8_PCREL | |
1173 | && r_type != R_CRIS_16_PCREL | |
1174 | && r_type != R_CRIS_32_PCREL) | |
1175 | || (!info->symbolic | |
1176 | || (h->elf_link_hash_flags | |
1177 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
1178 | { | |
1179 | Elf_Internal_Rela outrel; | |
1180 | boolean skip, relocate; | |
1181 | ||
1182 | /* When generating a shared object, these relocations | |
1183 | are copied into the output file to be resolved at run | |
1184 | time. */ | |
1185 | ||
1186 | if (sreloc == NULL) | |
1187 | { | |
1188 | const char *name; | |
1189 | ||
1190 | name = (bfd_elf_string_from_elf_section | |
1191 | (input_bfd, | |
1192 | elf_elfheader (input_bfd)->e_shstrndx, | |
1193 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1194 | if (name == NULL) | |
1195 | return false; | |
1196 | ||
1197 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1198 | && strcmp (bfd_get_section_name (input_bfd, | |
1199 | input_section), | |
1200 | name + 5) == 0); | |
1201 | ||
1202 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1203 | ||
1204 | /* That section should have been created in | |
1205 | cris_elf_check_relocs, but that function will not be | |
1206 | called for objects which fail in | |
1207 | cris_elf_merge_private_bfd_data. */ | |
1208 | if (sreloc == NULL) | |
1209 | { | |
1210 | (*_bfd_error_handler) | |
1211 | (_("%s: Internal inconsistency; no relocation section %s"), | |
1212 | bfd_get_filename (input_bfd), | |
1213 | name); | |
1214 | ||
1215 | bfd_set_error (bfd_error_bad_value); | |
1216 | return false; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | skip = false; | |
1221 | ||
1222 | if (elf_section_data (input_section)->stab_info == NULL) | |
1223 | outrel.r_offset = rel->r_offset; | |
1224 | else | |
1225 | { | |
1226 | bfd_vma off; | |
1227 | ||
1228 | off = (_bfd_stab_section_offset | |
1229 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1230 | input_section, | |
1231 | &elf_section_data (input_section)->stab_info, | |
1232 | rel->r_offset)); | |
1233 | if (off == (bfd_vma) -1) | |
1234 | skip = true; | |
1235 | outrel.r_offset = off; | |
1236 | } | |
1237 | ||
1238 | outrel.r_offset += (input_section->output_section->vma | |
1239 | + input_section->output_offset); | |
1240 | ||
1241 | if (skip) | |
1242 | { | |
1243 | memset (&outrel, 0, sizeof outrel); | |
1244 | relocate = false; | |
1245 | } | |
1246 | /* h->dynindx may be -1 if the symbol was marked to | |
1247 | become local. */ | |
1248 | else if (h != NULL | |
1249 | && ((! info->symbolic && h->dynindx != -1) | |
1250 | || (h->elf_link_hash_flags | |
1251 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1252 | { | |
1253 | BFD_ASSERT (h->dynindx != -1); | |
1254 | relocate = false; | |
1255 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
1256 | outrel.r_addend = relocation + rel->r_addend; | |
1257 | } | |
1258 | else | |
1259 | { | |
1260 | if (r_type == R_CRIS_32) | |
1261 | { | |
1262 | relocate = true; | |
1263 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); | |
1264 | outrel.r_addend = relocation + rel->r_addend; | |
1265 | } | |
1266 | else | |
1267 | { | |
1268 | long indx; | |
1269 | ||
1270 | if (h == NULL) | |
1271 | sec = local_sections[r_symndx]; | |
1272 | else | |
1273 | { | |
1274 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1275 | || (h->root.type | |
1276 | == bfd_link_hash_defweak)); | |
1277 | sec = h->root.u.def.section; | |
1278 | } | |
1279 | if (sec != NULL && bfd_is_abs_section (sec)) | |
1280 | indx = 0; | |
1281 | else if (sec == NULL || sec->owner == NULL) | |
1282 | { | |
1283 | bfd_set_error (bfd_error_bad_value); | |
1284 | return false; | |
1285 | } | |
1286 | else | |
1287 | { | |
1288 | asection *osec; | |
1289 | ||
1290 | osec = sec->output_section; | |
1291 | indx = elf_section_data (osec)->dynindx; | |
1292 | BFD_ASSERT (indx > 0); | |
1293 | } | |
1294 | ||
1295 | relocate = false; | |
1296 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
1297 | outrel.r_addend = relocation + rel->r_addend; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1302 | (((Elf32_External_Rela *) | |
1303 | sreloc->contents) | |
1304 | + sreloc->reloc_count)); | |
1305 | ++sreloc->reloc_count; | |
1306 | ||
1307 | /* This reloc will be computed at runtime, so there's no | |
1308 | need to do anything now, except for R_CRIS_32 relocations | |
1309 | that have been turned into R_CRIS_RELATIVE. */ | |
1310 | if (!relocate) | |
1311 | continue; | |
1312 | } | |
1313 | ||
1314 | break; | |
1315 | } | |
1316 | ||
1317 | r = cris_final_link_relocate (howto, input_bfd, input_section, | |
1318 | contents, rel, relocation); | |
1319 | ||
1320 | if (r != bfd_reloc_ok) | |
1321 | { | |
1322 | const char * msg = (const char *) NULL; | |
1323 | ||
1324 | switch (r) | |
1325 | { | |
1326 | case bfd_reloc_overflow: | |
1327 | r = info->callbacks->reloc_overflow | |
1328 | (info, name, howto->name, (bfd_vma) 0, | |
1329 | input_bfd, input_section, rel->r_offset); | |
1330 | break; | |
1331 | ||
1332 | case bfd_reloc_undefined: | |
1333 | r = info->callbacks->undefined_symbol | |
1334 | (info, name, input_bfd, input_section, rel->r_offset, | |
1335 | true); | |
1336 | break; | |
1337 | ||
1338 | case bfd_reloc_outofrange: | |
1339 | msg = _("internal error: out of range error"); | |
1340 | break; | |
1341 | ||
1342 | case bfd_reloc_notsupported: | |
1343 | msg = _("internal error: unsupported relocation error"); | |
1344 | break; | |
1345 | ||
1346 | case bfd_reloc_dangerous: | |
1347 | msg = _("internal error: dangerous relocation"); | |
1348 | break; | |
1349 | ||
1350 | default: | |
1351 | msg = _("internal error: unknown error"); | |
1352 | break; | |
1353 | } | |
1354 | ||
1355 | if (msg) | |
1356 | r = info->callbacks->warning | |
1357 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1358 | ||
1359 | if (! r) | |
1360 | return false; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | return true; | |
1365 | } | |
1366 | \f | |
1367 | /* Finish up dynamic symbol handling. We set the contents of various | |
1368 | dynamic sections here. */ | |
1369 | ||
1370 | static boolean | |
1371 | elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1372 | bfd *output_bfd; | |
1373 | struct bfd_link_info *info; | |
1374 | struct elf_link_hash_entry *h; | |
1375 | Elf_Internal_Sym *sym; | |
1376 | { | |
1377 | bfd *dynobj; | |
1378 | int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16; | |
1379 | ||
1380 | dynobj = elf_hash_table (info)->dynobj; | |
1381 | ||
1382 | if (h->plt.offset != (bfd_vma) -1) | |
1383 | { | |
1384 | asection *splt; | |
1385 | asection *sgotplt; | |
1386 | asection *sgot; | |
1387 | asection *srela; | |
1388 | bfd_vma got_base; | |
1389 | ||
1390 | bfd_vma gotplt_offset | |
1391 | = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; | |
1392 | Elf_Internal_Rela rela; | |
1393 | boolean has_gotplt = gotplt_offset != 0; | |
1394 | ||
1395 | /* Get the index in the procedure linkage table which | |
1396 | corresponds to this symbol. This is the index of this symbol | |
1397 | in all the symbols for which we are making plt entries. The | |
1398 | first entry in the procedure linkage table is reserved. */ | |
1399 | /* We have to count backwards here, and the result is only valid as | |
1400 | an index into .got.plt and its relocations. FIXME: Constants... */ | |
1401 | bfd_vma gotplt_index = gotplt_offset/4 - 3; | |
1402 | ||
1403 | /* Get the offset into the .got table of the entry that corresponds | |
1404 | to this function. Note that we embed knowledge that "incoming" | |
1405 | .got goes after .got.plt in the output without padding (pointer | |
1406 | aligned). However, that knowledge is present in several other | |
1407 | places too, here and in elflink.h at least. */ | |
1408 | bfd_vma got_offset | |
1409 | = (has_gotplt | |
1410 | ? gotplt_offset | |
1411 | : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry); | |
1412 | ||
1413 | /* This symbol has an entry in the procedure linkage table. Set it | |
1414 | up. */ | |
1415 | ||
1416 | BFD_ASSERT (h->dynindx != -1); | |
1417 | ||
1418 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1419 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1420 | sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1421 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1422 | BFD_ASSERT (splt != NULL && sgotplt != NULL | |
1423 | && (! has_gotplt || srela != NULL)); | |
1424 | ||
1425 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; | |
1426 | ||
1427 | /* Fill in the entry in the procedure linkage table. */ | |
1428 | if (! info->shared) | |
1429 | { | |
1430 | memcpy (splt->contents + h->plt.offset, elf_cris_plt_entry, | |
1431 | PLT_ENTRY_SIZE); | |
1432 | ||
1433 | /* We need to enter the absolute address of the GOT entry here. */ | |
1434 | bfd_put_32 (output_bfd, got_base + got_offset, | |
1435 | splt->contents + h->plt.offset + plt_off1); | |
1436 | } | |
1437 | else | |
1438 | { | |
1439 | memcpy (splt->contents + h->plt.offset, elf_cris_pic_plt_entry, | |
1440 | PLT_ENTRY_SIZE); | |
1441 | bfd_put_32 (output_bfd, got_offset, | |
1442 | splt->contents + h->plt.offset + plt_off1); | |
1443 | } | |
1444 | ||
1445 | /* Fill in the plt entry and make a relocation, if this is a "real" | |
1446 | PLT entry. */ | |
1447 | if (has_gotplt) | |
1448 | { | |
1449 | /* Fill in the offset into the reloc table. */ | |
1450 | bfd_put_32 (output_bfd, | |
1451 | gotplt_index * sizeof (Elf32_External_Rela), | |
1452 | splt->contents + h->plt.offset + plt_off2); | |
1453 | ||
1454 | /* Fill in the offset to the first PLT entry, where to "jump". */ | |
1455 | bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3 + 4), | |
1456 | splt->contents + h->plt.offset + plt_off3); | |
1457 | ||
1458 | /* Fill in the entry in the global offset table with the address of | |
1459 | the relocating stub. */ | |
1460 | bfd_put_32 (output_bfd, | |
1461 | (splt->output_section->vma | |
1462 | + splt->output_offset | |
1463 | + h->plt.offset | |
1464 | + 8), | |
1465 | sgotplt->contents + got_offset); | |
1466 | ||
1467 | /* Fill in the entry in the .rela.plt section. */ | |
1468 | rela.r_offset = (sgotplt->output_section->vma | |
1469 | + sgotplt->output_offset | |
1470 | + got_offset); | |
1471 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT); | |
1472 | rela.r_addend = 0; | |
1473 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1474 | ((Elf32_External_Rela *) srela->contents | |
1475 | + gotplt_index)); | |
1476 | } | |
1477 | ||
1478 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1479 | { | |
1480 | /* Mark the symbol as undefined, rather than as defined in | |
1481 | the .plt section. Leave the value alone. */ | |
1482 | sym->st_shndx = SHN_UNDEF; | |
1483 | ||
1484 | /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't | |
1485 | know whether resetting the value is significant; if it really | |
1486 | is, rather than a quirk or bug in the sparc port, then I | |
1487 | believe we'd see this elsewhere. */ | |
1488 | /* If the symbol is weak, we do need to clear the value. | |
1489 | Otherwise, the PLT entry would provide a definition for | |
1490 | the symbol even if the symbol wasn't defined anywhere, | |
1491 | and so the symbol would never be NULL. */ | |
1492 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
1493 | == 0) | |
1494 | sym->st_value = 0; | |
1495 | } | |
1496 | } | |
1497 | ||
4d96d128 HPN |
1498 | /* We don't emit .got relocs for symbols that aren't in the |
1499 | dynamic-symbols table for an ordinary program. */ | |
1500 | if (h->got.offset != (bfd_vma) -1 | |
1501 | && (info->shared || h->dynindx != -1)) | |
915e5146 HPN |
1502 | { |
1503 | asection *sgot; | |
1504 | asection *srela; | |
1505 | Elf_Internal_Rela rela; | |
1506 | ||
1507 | /* This symbol has an entry in the global offset table. Set it up. */ | |
1508 | ||
1509 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1510 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1511 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1512 | ||
1513 | rela.r_offset = (sgot->output_section->vma | |
1514 | + sgot->output_offset | |
1515 | + (h->got.offset &~ 1)); | |
1516 | ||
1517 | /* If this is a static link, or it is a -Bsymbolic link and the | |
1518 | symbol is defined locally or was forced to be local because | |
1519 | of a version file, we just want to emit a RELATIVE reloc. | |
1520 | The entry in the global offset table will already have been | |
1521 | initialized in the relocate_section function. */ | |
1522 | if (! elf_hash_table (info)->dynamic_sections_created | |
1523 | || (info->shared | |
1524 | && (info->symbolic || h->dynindx == -1) | |
1525 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1526 | { | |
1527 | rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); | |
1528 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
1529 | (sgot->contents | |
1530 | + (h->got.offset & ~1))); | |
1531 | } | |
1532 | else | |
1533 | { | |
1534 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
1535 | sgot->contents + (h->got.offset & ~1)); | |
1536 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT); | |
1537 | rela.r_addend = 0; | |
1538 | } | |
1539 | ||
1540 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1541 | ((Elf32_External_Rela *) srela->contents | |
1542 | + srela->reloc_count)); | |
1543 | ++srela->reloc_count; | |
1544 | } | |
1545 | ||
1546 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1547 | { | |
1548 | asection *s; | |
1549 | Elf_Internal_Rela rela; | |
1550 | ||
1551 | /* This symbol needs a copy reloc. Set it up. */ | |
1552 | ||
1553 | BFD_ASSERT (h->dynindx != -1 | |
1554 | && (h->root.type == bfd_link_hash_defined | |
1555 | || h->root.type == bfd_link_hash_defweak)); | |
1556 | ||
1557 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1558 | ".rela.bss"); | |
1559 | BFD_ASSERT (s != NULL); | |
1560 | ||
1561 | rela.r_offset = (h->root.u.def.value | |
1562 | + h->root.u.def.section->output_section->vma | |
1563 | + h->root.u.def.section->output_offset); | |
1564 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY); | |
1565 | rela.r_addend = 0; | |
1566 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1567 | ((Elf32_External_Rela *) s->contents | |
1568 | + s->reloc_count)); | |
1569 | ++s->reloc_count; | |
1570 | } | |
1571 | ||
1572 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1573 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1574 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1575 | sym->st_shndx = SHN_ABS; | |
1576 | ||
1577 | return true; | |
1578 | } | |
1579 | \f | |
1580 | /* Finish up the dynamic sections. */ | |
1581 | ||
1582 | static boolean | |
1583 | elf_cris_finish_dynamic_sections (output_bfd, info) | |
1584 | bfd *output_bfd; | |
1585 | struct bfd_link_info *info; | |
1586 | { | |
1587 | bfd *dynobj; | |
1588 | asection *sgot; | |
1589 | asection *sdyn; | |
1590 | ||
1591 | dynobj = elf_hash_table (info)->dynobj; | |
1592 | ||
1593 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1594 | BFD_ASSERT (sgot != NULL); | |
1595 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1596 | ||
1597 | if (elf_hash_table (info)->dynamic_sections_created) | |
1598 | { | |
1599 | asection *splt; | |
1600 | Elf32_External_Dyn *dyncon, *dynconend; | |
1601 | ||
1602 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1603 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
1604 | ||
1605 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
1606 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1607 | for (; dyncon < dynconend; dyncon++) | |
1608 | { | |
1609 | Elf_Internal_Dyn dyn; | |
1610 | asection *s; | |
1611 | ||
1612 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
1613 | ||
1614 | switch (dyn.d_tag) | |
1615 | { | |
1616 | default: | |
1617 | break; | |
1618 | ||
1619 | case DT_PLTGOT: | |
1620 | s = bfd_get_section_by_name (output_bfd, ".got"); | |
1621 | BFD_ASSERT (s != NULL); | |
1622 | dyn.d_un.d_ptr = s->vma; | |
1623 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1624 | break; | |
1625 | ||
1626 | case DT_JMPREL: | |
1627 | /* Yes, we *can* have a .plt and no .plt.rela, for instance | |
1628 | if all symbols are found in the .got (not .got.plt). */ | |
1629 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1630 | dyn.d_un.d_ptr = s != NULL ? s->vma : 0; | |
1631 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1632 | break; | |
1633 | ||
1634 | case DT_PLTRELSZ: | |
1635 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1636 | if (s == NULL) | |
1637 | dyn.d_un.d_val = 0; | |
1638 | else if (s->_cooked_size != 0) | |
1639 | dyn.d_un.d_val = s->_cooked_size; | |
1640 | else | |
1641 | dyn.d_un.d_val = s->_raw_size; | |
1642 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1643 | break; | |
1644 | ||
1645 | case DT_RELASZ: | |
1646 | /* The procedure linkage table relocs (DT_JMPREL) should | |
1647 | not be included in the overall relocs (DT_RELA). | |
1648 | Therefore, we override the DT_RELASZ entry here to | |
1649 | make it not include the JMPREL relocs. Since the | |
1650 | linker script arranges for .rela.plt to follow all | |
1651 | other relocation sections, we don't have to worry | |
1652 | about changing the DT_RELA entry. */ | |
1653 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1654 | if (s != NULL) | |
1655 | { | |
1656 | if (s->_cooked_size != 0) | |
1657 | dyn.d_un.d_val -= s->_cooked_size; | |
1658 | else | |
1659 | dyn.d_un.d_val -= s->_raw_size; | |
1660 | } | |
1661 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1662 | break; | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | /* Fill in the first entry in the procedure linkage table. */ | |
1667 | if (splt->_raw_size > 0) | |
1668 | { | |
1669 | if (info->shared) | |
1670 | memcpy (splt->contents, elf_cris_pic_plt0_entry, PLT_ENTRY_SIZE); | |
1671 | else | |
1672 | { | |
1673 | memcpy (splt->contents, elf_cris_plt0_entry, PLT_ENTRY_SIZE); | |
1674 | bfd_put_32 (output_bfd, | |
1675 | sgot->output_section->vma + sgot->output_offset + 4, | |
1676 | splt->contents + 6); | |
1677 | bfd_put_32 (output_bfd, | |
1678 | sgot->output_section->vma + sgot->output_offset + 8, | |
1679 | splt->contents + 14); | |
1680 | ||
1681 | elf_section_data (splt->output_section)->this_hdr.sh_entsize | |
1682 | = PLT_ENTRY_SIZE; | |
1683 | } | |
1684 | } | |
1685 | } | |
1686 | ||
1687 | /* Fill in the first three entries in the global offset table. */ | |
1688 | if (sgot->_raw_size > 0) | |
1689 | { | |
1690 | if (sdyn == NULL) | |
1691 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
1692 | else | |
1693 | bfd_put_32 (output_bfd, | |
1694 | sdyn->output_section->vma + sdyn->output_offset, | |
1695 | sgot->contents); | |
1696 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
1697 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
1698 | } | |
1699 | ||
1700 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
1701 | ||
1702 | return true; | |
06c15ad7 HPN |
1703 | } |
1704 | \f | |
1705 | /* Return the section that should be marked against GC for a given | |
1706 | relocation. */ | |
1707 | ||
1708 | static asection * | |
1709 | cris_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
1710 | bfd * abfd; | |
1711 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
1712 | Elf_Internal_Rela * rel; | |
1713 | struct elf_link_hash_entry * h; | |
1714 | Elf_Internal_Sym * sym; | |
1715 | { | |
1716 | if (h != NULL) | |
1717 | { | |
1718 | switch (ELF32_R_TYPE (rel->r_info)) | |
1719 | { | |
1720 | case R_CRIS_GNU_VTINHERIT: | |
1721 | case R_CRIS_GNU_VTENTRY: | |
1722 | break; | |
1723 | ||
1724 | default: | |
1725 | switch (h->root.type) | |
1726 | { | |
1727 | case bfd_link_hash_defined: | |
1728 | case bfd_link_hash_defweak: | |
1729 | return h->root.u.def.section; | |
1730 | ||
1731 | case bfd_link_hash_common: | |
1732 | return h->root.u.c.p->section; | |
1733 | ||
1734 | default: | |
1735 | break; | |
1736 | } | |
1737 | } | |
1738 | } | |
1739 | else | |
1740 | { | |
1741 | if (!(elf_bad_symtab (abfd) | |
1742 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
1743 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
1744 | && sym->st_shndx != SHN_COMMON)) | |
1745 | { | |
1746 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | return NULL; | |
1751 | } | |
1752 | ||
1753 | /* Update the got entry reference counts for the section being removed. */ | |
1754 | ||
1755 | static boolean | |
1756 | cris_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
1757 | bfd * abfd ATTRIBUTE_UNUSED; | |
1758 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
1759 | asection * sec ATTRIBUTE_UNUSED; | |
1760 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; | |
1761 | { | |
915e5146 HPN |
1762 | Elf_Internal_Shdr *symtab_hdr; |
1763 | struct elf_link_hash_entry **sym_hashes; | |
1764 | bfd_signed_vma *local_got_refcounts; | |
1765 | const Elf_Internal_Rela *rel, *relend; | |
1766 | unsigned long r_symndx; | |
1767 | struct elf_link_hash_entry *h; | |
1768 | bfd *dynobj; | |
1769 | asection *sgot; | |
1770 | asection *srelgot; | |
1771 | ||
1772 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1773 | sym_hashes = elf_sym_hashes (abfd); | |
1774 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1775 | ||
1776 | dynobj = elf_hash_table (info)->dynobj; | |
1777 | if (dynobj == NULL) | |
1778 | return true; | |
1779 | ||
1780 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1781 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1782 | ||
1783 | relend = relocs + sec->reloc_count; | |
1784 | for (rel = relocs; rel < relend; rel++) | |
1785 | { | |
1786 | switch (ELF32_R_TYPE (rel->r_info)) | |
1787 | { | |
1788 | case R_CRIS_16_GOT: | |
1789 | case R_CRIS_32_GOT: | |
1790 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1791 | if (r_symndx >= symtab_hdr->sh_info) | |
1792 | { | |
1793 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1794 | if (h->got.refcount > 0) | |
1795 | { | |
1796 | --h->got.refcount; | |
1797 | if (h->got.refcount == 0) | |
1798 | { | |
1799 | /* We don't need the .got entry any more. */ | |
1800 | sgot->_raw_size -= 4; | |
1801 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
1802 | } | |
1803 | } | |
1804 | break; | |
1805 | } | |
1806 | ||
1807 | local_got_reloc: | |
1808 | if (local_got_refcounts != NULL) | |
1809 | { | |
1810 | if (local_got_refcounts[r_symndx] > 0) | |
1811 | { | |
1812 | --local_got_refcounts[r_symndx]; | |
1813 | if (local_got_refcounts[r_symndx] == 0) | |
1814 | { | |
1815 | /* We don't need the .got entry any more. */ | |
1816 | sgot->_raw_size -= 4; | |
1817 | if (info->shared) | |
1818 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
1819 | } | |
1820 | } | |
1821 | } | |
1822 | break; | |
1823 | ||
1824 | case R_CRIS_16_GOTPLT: | |
1825 | case R_CRIS_32_GOTPLT: | |
1826 | /* For local symbols, treat these like GOT relocs. */ | |
1827 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1828 | if (r_symndx < symtab_hdr->sh_info) | |
1829 | goto local_got_reloc; | |
1830 | ||
1831 | case R_CRIS_32_PLT_GOTREL: | |
1832 | /* FIXME: We don't garbage-collect away the .got section. */ | |
1833 | if (local_got_refcounts != NULL) | |
1834 | local_got_refcounts[-1]--; | |
1835 | /* Fall through. */ | |
1836 | ||
1837 | case R_CRIS_8_PCREL: | |
1838 | case R_CRIS_16_PCREL: | |
1839 | case R_CRIS_32_PCREL: | |
1840 | case R_CRIS_32_PLT_PCREL: | |
1841 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1842 | if (r_symndx >= symtab_hdr->sh_info) | |
1843 | { | |
1844 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1845 | if (h->plt.refcount > 0) | |
1846 | --h->plt.refcount; | |
1847 | } | |
1848 | break; | |
1849 | ||
1850 | default: | |
1851 | break; | |
1852 | } | |
1853 | } | |
1854 | ||
06c15ad7 HPN |
1855 | return true; |
1856 | } | |
1857 | ||
915e5146 HPN |
1858 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1859 | entry but we found we will not create any. Called when we find we will | |
4d96d128 HPN |
1860 | not have any PLT for this symbol, by for example |
1861 | elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1862 | or elf_cris_size_dynamic_sections if no dynamic sections will be | |
1863 | created (we're only linking static objects). */ | |
915e5146 HPN |
1864 | |
1865 | static boolean | |
1866 | elf_cris_adjust_gotplt_to_got (h, p) | |
1867 | struct elf_cris_link_hash_entry *h; | |
1868 | PTR p; | |
1869 | { | |
1870 | struct bfd_link_info *info = (struct bfd_link_info *) p; | |
1871 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
1872 | ||
1873 | BFD_ASSERT (dynobj != NULL); | |
1874 | ||
1875 | /* If nobody wanted a GOTPLT with this symbol, we're done. */ | |
1876 | if (h->gotplt_refcount <= 0) | |
1877 | return true; | |
1878 | ||
1879 | if (h->root.got.refcount > 0) | |
1880 | { | |
1881 | /* There's a GOT entry for this symbol. Just adjust the refcount. | |
1882 | Probably not necessary at this stage, but keeping it accurate | |
1883 | helps avoiding surprises later. */ | |
1884 | h->root.got.refcount += h->gotplt_refcount; | |
1885 | h->gotplt_refcount = -1; | |
1886 | } | |
1887 | else | |
1888 | { | |
4d96d128 | 1889 | /* No GOT entry for this symbol. We need to create one. */ |
915e5146 HPN |
1890 | asection *sgot = bfd_get_section_by_name (dynobj, ".got"); |
1891 | asection *srelgot | |
1892 | = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1893 | ||
1894 | /* Put an accurate refcount there. */ | |
1895 | h->root.got.refcount = h->gotplt_refcount; | |
1896 | ||
1897 | h->gotplt_refcount = -1; | |
1898 | ||
1899 | /* We always have a .got section when there are dynamic | |
1900 | relocs. */ | |
1901 | BFD_ASSERT (sgot != NULL /* Surely have .got section. */); | |
1902 | ||
1903 | /* We might have had a PLT but with no GOT entry and | |
1904 | further no GOT reloc section at all needed before. | |
1905 | Add it. */ | |
1906 | if (srelgot == NULL) | |
1907 | { | |
1908 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
1909 | ||
1910 | if (srelgot == NULL | |
1911 | || !bfd_set_section_flags (dynobj, srelgot, | |
1912 | (SEC_ALLOC | |
1913 | | SEC_LOAD | |
1914 | | SEC_HAS_CONTENTS | |
1915 | | SEC_IN_MEMORY | |
1916 | | SEC_LINKER_CREATED | |
1917 | | SEC_READONLY)) | |
1918 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
1919 | return false; | |
1920 | } | |
1921 | ||
1922 | /* Allocate space in the .got section. */ | |
1923 | sgot->_raw_size += 4; | |
1924 | ||
1925 | /* Allocate relocation space. */ | |
1926 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
1927 | } | |
1928 | ||
1929 | return true; | |
1930 | } | |
1931 | ||
1932 | /* Try to fold PLT entries with GOT entries. There are two cases when we | |
1933 | want to do this: | |
1934 | ||
1935 | - When all PLT references are GOTPLT references, and there are GOT | |
1936 | references. We don't have to generate a PLT at all. | |
1937 | ||
1938 | - When there are both (ordinary) PLT references and GOT references. | |
1939 | We want to make the PLT reference use the ordinary GOT entry rather | |
1940 | than a run-time dynamically resolved GOTPLT entry (since the GOT | |
1941 | entry will have to be resolved at startup anyway). | |
1942 | ||
1943 | Though the latter case is handled when room for the PLT is allocated, | |
1944 | not here. | |
1945 | ||
1946 | Note that this function is called before symbols are forced local by | |
1947 | version scripts. The differing cases are handled by | |
1948 | elf_cris_hide_symbol. */ | |
1949 | ||
1950 | static boolean | |
1951 | elf_cris_try_fold_plt_to_got (h, p) | |
1952 | struct elf_cris_link_hash_entry *h; | |
1953 | PTR p; | |
1954 | { | |
1955 | struct bfd_link_info *info = (struct bfd_link_info *) p; | |
1956 | ||
1957 | /* If there are no GOT references for this symbol, we can't fold any | |
1958 | other reference so there's nothing to do. Likewise if there are no | |
1959 | PLT references; GOTPLT references included. */ | |
1960 | if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0) | |
1961 | return true; | |
1962 | ||
1963 | /* GOTPLT relocs are supposed to be included into the PLT refcount. */ | |
1964 | BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount); | |
1965 | ||
1966 | if (h->gotplt_refcount == h->root.plt.refcount) | |
1967 | { | |
4d96d128 | 1968 | /* The only PLT references are GOTPLT references, and there are GOT |
915e5146 HPN |
1969 | references. Convert PLT to GOT references. */ |
1970 | if (! elf_cris_adjust_gotplt_to_got (h, info)) | |
1971 | return false; | |
1972 | ||
1973 | /* Clear the PLT references, so no PLT will be created. */ | |
1974 | h->root.plt.offset = (bfd_vma) -1; | |
1975 | } | |
1976 | ||
1977 | return true; | |
1978 | } | |
1979 | ||
1980 | /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc | |
1981 | to use a GOT entry (and create one) rather than requiring a GOTPLT | |
1982 | entry. */ | |
1983 | ||
1984 | static void | |
1985 | elf_cris_hide_symbol (info, h) | |
1986 | struct bfd_link_info *info; | |
1987 | struct elf_link_hash_entry *h; | |
1988 | { | |
1989 | elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info); | |
1990 | ||
1991 | _bfd_elf_link_hash_hide_symbol (info, h); | |
1992 | } | |
1993 | ||
1994 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1995 | regular object. The current definition is in some section of the | |
1996 | dynamic object, but we're not including those sections. We have to | |
1997 | change the definition to something the rest of the link can | |
1998 | understand. */ | |
1999 | ||
2000 | static boolean | |
2001 | elf_cris_adjust_dynamic_symbol (info, h) | |
2002 | struct bfd_link_info *info; | |
2003 | struct elf_link_hash_entry *h; | |
2004 | { | |
2005 | bfd *dynobj; | |
2006 | asection *s; | |
2007 | unsigned int power_of_two; | |
2008 | ||
2009 | dynobj = elf_hash_table (info)->dynobj; | |
2010 | ||
2011 | /* Make sure we know what is going on here. */ | |
2012 | BFD_ASSERT (dynobj != NULL | |
2013 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
2014 | || h->weakdef != NULL | |
2015 | || ((h->elf_link_hash_flags | |
2016 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2017 | && (h->elf_link_hash_flags | |
2018 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2019 | && (h->elf_link_hash_flags | |
2020 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
2021 | ||
2022 | /* If this is a function, put it in the procedure linkage table. We | |
2023 | will fill in the contents of the procedure linkage table later, | |
2024 | when we know the address of the .got section. */ | |
2025 | if (h->type == STT_FUNC | |
2026 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
2027 | { | |
2028 | if (! info->shared | |
2029 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
2030 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 | |
2031 | /* We must always create the plt entry if it was referenced by a | |
2032 | PLT relocation. In this case we already recorded it as a | |
2033 | dynamic symbol. */ | |
2034 | /* FIXME: m68k and i386 differ here, for unclear reasons. */ | |
2035 | && h->dynindx == -1) | |
2036 | { | |
2037 | /* This case can occur if we saw a PLT reloc in an input file, | |
2038 | but the symbol was never referred to by a dynamic object. In | |
2039 | such a case, we don't actually need to build a procedure | |
4d96d128 HPN |
2040 | linkage table, and we can just do a PC reloc instead, or |
2041 | change a .got.plt index to a .got index for GOTPLT relocs. */ | |
915e5146 HPN |
2042 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
2043 | h->plt.offset = (bfd_vma) -1; | |
2044 | ||
2045 | return | |
2046 | elf_cris_adjust_gotplt_to_got ((struct | |
2047 | elf_cris_link_hash_entry *) h, | |
2048 | info); | |
2049 | } | |
2050 | ||
2051 | /* If there are only GOT references and GOTPLT references to this | |
2052 | PLT entry, get rid of the PLT. */ | |
2053 | if (! elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry *) | |
2054 | h, info)) | |
2055 | return false; | |
2056 | ||
2057 | /* GC or folding may have rendered this entry unused. */ | |
2058 | if (h->plt.refcount <= 0) | |
2059 | { | |
2060 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
2061 | h->plt.offset = (bfd_vma) -1; | |
2062 | return true; | |
2063 | } | |
2064 | ||
2065 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2066 | if (h->dynindx == -1) | |
2067 | { | |
2068 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2069 | return false; | |
2070 | } | |
2071 | ||
2072 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
2073 | BFD_ASSERT (s != NULL); | |
2074 | ||
2075 | /* If this is the first .plt entry, make room for the special | |
2076 | first entry. */ | |
2077 | if (s->_raw_size == 0) | |
2078 | s->_raw_size += PLT_ENTRY_SIZE; | |
2079 | ||
2080 | /* If this symbol is not defined in a regular file, and we are | |
2081 | not generating a shared library, then set the symbol to this | |
2082 | location in the .plt. This is required to make function | |
2083 | pointers compare as equal between the normal executable and | |
2084 | the shared library. */ | |
2085 | if (!info->shared | |
2086 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2087 | { | |
2088 | h->root.u.def.section = s; | |
2089 | h->root.u.def.value = s->_raw_size; | |
2090 | } | |
2091 | ||
4d96d128 HPN |
2092 | /* If there's already a GOT entry, use that, not a .got.plt. A |
2093 | GOT field still has a reference count when we get here; it's | |
2094 | not yet changed to an offset. */ | |
915e5146 HPN |
2095 | if (h->got.refcount > 0) |
2096 | { | |
2097 | h->got.refcount += h->plt.refcount; | |
2098 | ||
2099 | /* Mark the PLT offset to use the GOT entry by setting the low | |
2100 | bit in the plt offset; it is always a multiple of | |
2101 | pointer-size. */ | |
2102 | BFD_ASSERT ((s->_raw_size & 3) == 0); | |
2103 | ||
2104 | /* Change the PLT refcount to an offset. */ | |
2105 | h->plt.offset = s->_raw_size; | |
2106 | ||
2107 | /* By not setting gotplt_offset (i.e. it remains at 0), we signal | |
2108 | that the got entry should be used instead. */ | |
2109 | BFD_ASSERT (((struct elf_cris_link_hash_entry *) | |
2110 | h)->gotplt_offset == 0); | |
2111 | ||
2112 | /* Make room for this entry. */ | |
2113 | s->_raw_size += PLT_ENTRY_SIZE; | |
2114 | ||
2115 | return true; | |
2116 | } | |
2117 | ||
2118 | /* No GOT reference for this symbol; prepare for an ordinary PLT. */ | |
2119 | h->plt.offset = s->_raw_size; | |
2120 | ||
2121 | /* Make room for this entry. */ | |
2122 | s->_raw_size += PLT_ENTRY_SIZE; | |
2123 | ||
2124 | /* We also need to make an entry in the .got.plt section, which | |
2125 | will be placed in the .got section by the linker script. */ | |
2126 | ((struct elf_cris_link_hash_entry *) h)->gotplt_offset | |
2127 | = elf_cris_hash_table (info)->next_gotplt_entry; | |
2128 | elf_cris_hash_table (info)->next_gotplt_entry += 4; | |
2129 | ||
2130 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2131 | BFD_ASSERT (s != NULL); | |
2132 | s->_raw_size += 4; | |
2133 | ||
2134 | /* We also need to make an entry in the .rela.plt section. */ | |
2135 | ||
2136 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
2137 | BFD_ASSERT (s != NULL); | |
2138 | s->_raw_size += sizeof (Elf32_External_Rela); | |
2139 | ||
2140 | return true; | |
2141 | } | |
2142 | ||
2143 | /* Reinitialize the plt offset now that it is not used as a reference | |
2144 | count any more. */ | |
2145 | h->plt.offset = (bfd_vma) -1; | |
2146 | ||
2147 | /* If this is a weak symbol, and there is a real definition, the | |
2148 | processor independent code will have arranged for us to see the | |
2149 | real definition first, and we can just use the same value. */ | |
2150 | if (h->weakdef != NULL) | |
2151 | { | |
2152 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
2153 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
2154 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
2155 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
2156 | return true; | |
2157 | } | |
2158 | ||
2159 | /* This is a reference to a symbol defined by a dynamic object which | |
2160 | is not a function. */ | |
2161 | ||
2162 | /* If we are creating a shared library, we must presume that the | |
2163 | only references to the symbol are via the global offset table. | |
2164 | For such cases we need not do anything here; the relocations will | |
2165 | be handled correctly by relocate_section. */ | |
2166 | if (info->shared) | |
2167 | return true; | |
2168 | ||
2169 | /* If there are no references to this symbol that do not use the | |
2170 | GOT, we don't need to generate a copy reloc. */ | |
2171 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
2172 | return true; | |
2173 | ||
2174 | /* We must allocate the symbol in our .dynbss section, which will | |
2175 | become part of the .bss section of the executable. There will be | |
2176 | an entry for this symbol in the .dynsym section. The dynamic | |
2177 | object will contain position independent code, so all references | |
2178 | from the dynamic object to this symbol will go through the global | |
2179 | offset table. The dynamic linker will use the .dynsym entry to | |
2180 | determine the address it must put in the global offset table, so | |
2181 | both the dynamic object and the regular object will refer to the | |
2182 | same memory location for the variable. */ | |
2183 | ||
2184 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
2185 | BFD_ASSERT (s != NULL); | |
2186 | ||
2187 | /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to | |
2188 | copy the initial value out of the dynamic object and into the | |
2189 | runtime process image. We need to remember the offset into the | |
2190 | .rela.bss section we are going to use. */ | |
2191 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2192 | { | |
2193 | asection *srel; | |
2194 | ||
2195 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
2196 | BFD_ASSERT (srel != NULL); | |
2197 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
2198 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
2199 | } | |
2200 | ||
2201 | /* Historic precedent: m68k and i386 allow max 8-byte alignment for the | |
2202 | thing to copy; so do we. */ | |
2203 | ||
2204 | /* We need to figure out the alignment required for this symbol. I | |
2205 | have no idea how ELF linkers handle this. */ | |
2206 | power_of_two = bfd_log2 (h->size); | |
2207 | if (power_of_two > 3) | |
2208 | power_of_two = 3; | |
2209 | ||
2210 | /* Apply the required alignment. */ | |
2211 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
2212 | (bfd_size_type) (1 << power_of_two)); | |
2213 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
2214 | { | |
2215 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
2216 | return false; | |
2217 | } | |
2218 | ||
2219 | /* Define the symbol as being at this point in the section. */ | |
2220 | h->root.u.def.section = s; | |
2221 | h->root.u.def.value = s->_raw_size; | |
2222 | ||
2223 | /* Increment the section size to make room for the symbol. */ | |
2224 | s->_raw_size += h->size; | |
2225 | ||
2226 | return true; | |
2227 | } | |
2228 | ||
2229 | /* Look through the relocs for a section during the first phase. */ | |
a7c10850 | 2230 | |
06c15ad7 HPN |
2231 | static boolean |
2232 | cris_elf_check_relocs (abfd, info, sec, relocs) | |
2233 | bfd *abfd; | |
2234 | struct bfd_link_info *info; | |
2235 | asection *sec; | |
2236 | const Elf_Internal_Rela *relocs; | |
2237 | { | |
915e5146 | 2238 | bfd *dynobj; |
06c15ad7 HPN |
2239 | Elf_Internal_Shdr *symtab_hdr; |
2240 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
915e5146 | 2241 | bfd_signed_vma *local_got_refcounts; |
06c15ad7 HPN |
2242 | const Elf_Internal_Rela *rel; |
2243 | const Elf_Internal_Rela *rel_end; | |
915e5146 HPN |
2244 | asection *sgot; |
2245 | asection *srelgot; | |
2246 | asection *sreloc; | |
a7c10850 | 2247 | |
06c15ad7 HPN |
2248 | if (info->relocateable) |
2249 | return true; | |
a7c10850 | 2250 | |
915e5146 | 2251 | dynobj = elf_hash_table (info)->dynobj; |
06c15ad7 HPN |
2252 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2253 | sym_hashes = elf_sym_hashes (abfd); | |
a7c10850 | 2254 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
915e5146 HPN |
2255 | local_got_refcounts = elf_local_got_refcounts (abfd); |
2256 | ||
2257 | sgot = NULL; | |
2258 | srelgot = NULL; | |
2259 | sreloc = NULL; | |
2260 | ||
06c15ad7 HPN |
2261 | if (!elf_bad_symtab (abfd)) |
2262 | sym_hashes_end -= symtab_hdr->sh_info; | |
a7c10850 | 2263 | |
06c15ad7 HPN |
2264 | rel_end = relocs + sec->reloc_count; |
2265 | for (rel = relocs; rel < rel_end; rel++) | |
2266 | { | |
2267 | struct elf_link_hash_entry *h; | |
2268 | unsigned long r_symndx; | |
915e5146 | 2269 | enum elf_cris_reloc_type r_type; |
a7c10850 | 2270 | |
06c15ad7 HPN |
2271 | r_symndx = ELF32_R_SYM (rel->r_info); |
2272 | if (r_symndx < symtab_hdr->sh_info) | |
2273 | h = NULL; | |
2274 | else | |
2275 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
a7c10850 | 2276 | |
915e5146 HPN |
2277 | r_type = ELF32_R_TYPE (rel->r_info); |
2278 | ||
2279 | /* Some relocs require linker-created sections; we need to hang them | |
2280 | on the first input bfd we found that contained dynamic relocs. */ | |
2281 | switch (r_type) | |
2282 | { | |
2283 | case R_CRIS_16_GOT: | |
2284 | case R_CRIS_32_GOT: | |
2285 | case R_CRIS_32_GOTREL: | |
2286 | case R_CRIS_32_PLT_GOTREL: | |
2287 | case R_CRIS_32_PLT_PCREL: | |
2288 | case R_CRIS_16_GOTPLT: | |
2289 | case R_CRIS_32_GOTPLT: | |
2290 | if (dynobj == NULL) | |
2291 | { | |
2292 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
2293 | ||
2294 | /* Create the .got section, so we can assume it's always | |
2295 | present whenever there's a dynobj. */ | |
2296 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
2297 | return false; | |
2298 | } | |
2299 | break; | |
2300 | ||
2301 | default: | |
2302 | break; | |
2303 | } | |
2304 | ||
2305 | /* Some relocs require a global offset table (but perhaps not a | |
2306 | specific GOT entry). */ | |
4d96d128 | 2307 | switch (r_type) |
915e5146 HPN |
2308 | { |
2309 | case R_CRIS_16_GOT: | |
2310 | case R_CRIS_32_GOT: | |
2311 | case R_CRIS_32_GOTREL: | |
2312 | case R_CRIS_32_PLT_GOTREL: | |
2313 | if (sgot == NULL) | |
2314 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2315 | ||
2316 | if (local_got_refcounts == NULL) | |
2317 | { | |
2318 | size_t size; | |
2319 | ||
2320 | /* We use index local_got_refcounts[-1] to count all | |
2321 | GOT-relative relocations that do not have explicit | |
2322 | GOT entries. */ | |
2323 | size = (symtab_hdr->sh_info + 1) * sizeof (bfd_signed_vma); | |
2324 | local_got_refcounts = ((bfd_signed_vma *) | |
2325 | bfd_alloc (abfd, size)); | |
2326 | if (local_got_refcounts == NULL) | |
2327 | return false; | |
2328 | memset (local_got_refcounts, -1, size); | |
2329 | ||
2330 | local_got_refcounts++; | |
2331 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
2332 | } | |
2333 | break; | |
2334 | ||
2335 | default: | |
2336 | break; | |
2337 | } | |
2338 | ||
4d96d128 | 2339 | switch (r_type) |
06c15ad7 | 2340 | { |
915e5146 HPN |
2341 | case R_CRIS_16_GOTPLT: |
2342 | case R_CRIS_32_GOTPLT: | |
2343 | /* Mark that we need a GOT entry if the PLT entry (and its GOT | |
2344 | entry) is eliminated. We can only do this for a non-local | |
2345 | symbol. */ | |
2346 | if (h != NULL) | |
2347 | { | |
2348 | ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++; | |
2349 | goto handle_gotplt_reloc; | |
2350 | } | |
2351 | /* If h is NULL then this is a local symbol, and we must make a | |
2352 | GOT entry for it, so handle it like a GOT reloc. */ | |
2353 | /* Fall through. */ | |
2354 | ||
2355 | case R_CRIS_16_GOT: | |
2356 | case R_CRIS_32_GOT: | |
2357 | /* This symbol requires a global offset table entry. */ | |
2358 | ||
2359 | if (srelgot == NULL | |
2360 | && (h != NULL || info->shared)) | |
2361 | { | |
2362 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
2363 | if (srelgot == NULL) | |
2364 | { | |
2365 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
2366 | if (srelgot == NULL | |
2367 | || !bfd_set_section_flags (dynobj, srelgot, | |
2368 | (SEC_ALLOC | |
2369 | | SEC_LOAD | |
2370 | | SEC_HAS_CONTENTS | |
2371 | | SEC_IN_MEMORY | |
2372 | | SEC_LINKER_CREATED | |
2373 | | SEC_READONLY)) | |
2374 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
2375 | return false; | |
2376 | } | |
2377 | } | |
2378 | ||
2379 | if (h != NULL) | |
2380 | { | |
2381 | if (h->got.refcount == -1) | |
2382 | { | |
2383 | h->got.refcount = 1; | |
2384 | ||
2385 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2386 | if (h->dynindx == -1) | |
2387 | { | |
2388 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2389 | return false; | |
2390 | } | |
2391 | ||
2392 | /* Allocate space in the .got section. */ | |
2393 | sgot->_raw_size += 4; | |
2394 | /* Allocate relocation space. */ | |
2395 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
2396 | } | |
2397 | else | |
2398 | h->got.refcount++; | |
2399 | } | |
2400 | else | |
2401 | { | |
2402 | /* This is a global offset table entry for a local symbol. */ | |
2403 | if (local_got_refcounts[r_symndx] == -1) | |
2404 | { | |
2405 | local_got_refcounts[r_symndx] = 1; | |
2406 | ||
2407 | sgot->_raw_size += 4; | |
2408 | if (info->shared) | |
2409 | { | |
2410 | /* If we are generating a shared object, we need to | |
2411 | output a R_CRIS_RELATIVE reloc so that the dynamic | |
2412 | linker can adjust this GOT entry. */ | |
2413 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
2414 | } | |
2415 | } | |
2416 | else | |
2417 | local_got_refcounts[r_symndx]++; | |
2418 | } | |
2419 | break; | |
2420 | ||
2421 | case R_CRIS_32_GOTREL: | |
2422 | /* This reference requires a global offset table. | |
2423 | FIXME: The actual refcount isn't used currently; the .got | |
2424 | section can't be removed if there were any references in the | |
2425 | input. */ | |
2426 | local_got_refcounts[-1]++; | |
2427 | break; | |
2428 | ||
2429 | handle_gotplt_reloc: | |
2430 | ||
2431 | case R_CRIS_32_PLT_GOTREL: | |
2432 | /* This reference requires a global offset table. */ | |
2433 | local_got_refcounts[-1]++; | |
2434 | /* Fall through. */ | |
2435 | ||
2436 | case R_CRIS_32_PLT_PCREL: | |
2437 | /* This symbol requires a procedure linkage table entry. We | |
2438 | actually build the entry in adjust_dynamic_symbol, | |
2439 | because this might be a case of linking PIC code which is | |
2440 | never referenced by a dynamic object, in which case we | |
2441 | don't need to generate a procedure linkage table entry | |
2442 | after all. */ | |
2443 | ||
2444 | /* If this is a local symbol, we resolve it directly without | |
2445 | creating a procedure linkage table entry. */ | |
2446 | if (h == NULL) | |
2447 | continue; | |
2448 | ||
2449 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2450 | if (h->plt.refcount == -1) | |
2451 | h->plt.refcount = 1; | |
2452 | else | |
2453 | h->plt.refcount++; | |
2454 | break; | |
2455 | ||
2456 | case R_CRIS_8: | |
2457 | case R_CRIS_16: | |
2458 | case R_CRIS_32: | |
2459 | /* Let's help debug shared library creation. Any of these | |
2460 | relocs can be used in shared libs, but pages containing them | |
2461 | cannot be shared. Don't warn for sections we don't care | |
2462 | about, such as debug sections or non-constant sections. We | |
2463 | can't help tables of (global) function pointers, for example, | |
2464 | though they must be emitted in a data section to avoid having | |
2465 | impure text sections. */ | |
2466 | if (info->shared | |
2467 | && (sec->flags & SEC_ALLOC) != 0 | |
2468 | && (sec->flags & SEC_READONLY) != 0) | |
2469 | { | |
2470 | /* FIXME: How do we make this optionally a warning only? */ | |
2471 | if (abfd->my_archive) | |
2472 | (*_bfd_error_handler) | |
2473 | (_("%s(%s), section %s:\n relocation %s should not be used in a shared object; recompile with -fPIC"), | |
2474 | bfd_get_filename (bfd_my_archive (abfd)), | |
2475 | bfd_get_filename (abfd), | |
2476 | sec->name, | |
4d96d128 | 2477 | cris_elf_howto_table[r_type].name); |
915e5146 HPN |
2478 | else |
2479 | (*_bfd_error_handler) | |
2480 | (_("%s, section %s:\n relocation %s should not be used in a shared object; recompile with -fPIC"), | |
2481 | bfd_get_filename (abfd), | |
2482 | sec->name, | |
4d96d128 | 2483 | cris_elf_howto_table[r_type].name); |
915e5146 HPN |
2484 | } |
2485 | /* Fall through. */ | |
2486 | ||
2487 | case R_CRIS_8_PCREL: | |
2488 | case R_CRIS_16_PCREL: | |
2489 | case R_CRIS_32_PCREL: | |
2490 | if (h != NULL) | |
2491 | { | |
2492 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
2493 | ||
2494 | /* Make sure a plt entry is created for this symbol if it | |
2495 | turns out to be a function defined by a dynamic object. */ | |
2496 | if (h->plt.refcount == -1) | |
2497 | h->plt.refcount = 1; | |
2498 | else | |
2499 | h->plt.refcount++; | |
2500 | } | |
2501 | ||
2502 | /* If we are creating a shared library and this is not a local | |
2503 | symbol, we need to copy the reloc into the shared library. | |
2504 | However when linking with -Bsymbolic and this is a global | |
2505 | symbol which is defined in an object we are including in the | |
2506 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
2507 | reloc directly. At this point we have not seen all the input | |
2508 | files, so it is possible that DEF_REGULAR is not set now but | |
2509 | will be set later (it is never cleared). In case of a weak | |
2510 | definition, DEF_REGULAR may be cleared later by a strong | |
2511 | definition in a shared library. We account for that | |
2512 | possibility below by storing information in the relocs_copied | |
2513 | field of the hash table entry. A similar situation occurs | |
2514 | when creating shared libraries and symbol visibility changes | |
2515 | render the symbol local. */ | |
2516 | ||
2517 | /* No need to do anything if we're not creating a shared object. */ | |
2518 | if (! info->shared) | |
2519 | break; | |
2520 | ||
2521 | /* We don't need to handle relocs into sections not going into | |
2522 | the "real" output. */ | |
2523 | if ((sec->flags & SEC_ALLOC) == 0) | |
2524 | break; | |
2525 | ||
2526 | /* We can only eliminate PC-relative relocs. */ | |
2527 | if (r_type == R_CRIS_8_PCREL | |
2528 | || r_type == R_CRIS_16_PCREL | |
2529 | || r_type == R_CRIS_32_PCREL) | |
2530 | { | |
2531 | /* If the symbol is local, then we can eliminate the reloc. */ | |
2532 | if (h == NULL) | |
2533 | break; | |
2534 | ||
2535 | /* If this is with -Bsymbolic and the symbol isn't weak, and | |
2536 | is defined by an ordinary object (the ones we include in | |
2537 | this shared library) then we can also eliminate the | |
2538 | reloc. See comment above for more eliminable cases which | |
2539 | we can't identify at this time. */ | |
2540 | if (info->symbolic | |
2541 | && h->root.type != bfd_link_hash_defweak | |
2542 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2543 | break; | |
2544 | } | |
2545 | ||
2546 | /* We create a reloc section in dynobj and make room for this | |
2547 | reloc. */ | |
2548 | if (sreloc == NULL) | |
2549 | { | |
2550 | const char *name; | |
2551 | ||
2552 | name = (bfd_elf_string_from_elf_section | |
2553 | (abfd, | |
2554 | elf_elfheader (abfd)->e_shstrndx, | |
2555 | elf_section_data (sec)->rel_hdr.sh_name)); | |
2556 | if (name == NULL) | |
2557 | return false; | |
2558 | ||
2559 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
2560 | && strcmp (bfd_get_section_name (abfd, sec), | |
2561 | name + 5) == 0); | |
2562 | ||
2563 | sreloc = bfd_get_section_by_name (dynobj, name); | |
2564 | if (sreloc == NULL) | |
2565 | { | |
2566 | sreloc = bfd_make_section (dynobj, name); | |
2567 | if (sreloc == NULL | |
2568 | || !bfd_set_section_flags (dynobj, sreloc, | |
2569 | (SEC_ALLOC | |
2570 | | SEC_LOAD | |
2571 | | SEC_HAS_CONTENTS | |
2572 | | SEC_IN_MEMORY | |
2573 | | SEC_LINKER_CREATED | |
2574 | | SEC_READONLY)) | |
2575 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) | |
2576 | return false; | |
2577 | } | |
2578 | } | |
2579 | ||
2580 | sreloc->_raw_size += sizeof (Elf32_External_Rela); | |
2581 | ||
2582 | /* If we are linking with -Bsymbolic, we count the number of PC | |
2583 | relative relocations we have entered for this symbol, so that | |
2584 | we can discard them again if the symbol is later defined by a | |
2585 | regular object. We know that h is really a pointer to an | |
2586 | elf_cris_link_hash_entry. */ | |
4d96d128 HPN |
2587 | if ((r_type == R_CRIS_8_PCREL |
2588 | || r_type == R_CRIS_16_PCREL | |
2589 | || r_type == R_CRIS_32_PCREL) | |
915e5146 HPN |
2590 | && info->symbolic) |
2591 | { | |
2592 | struct elf_cris_link_hash_entry *eh; | |
2593 | struct elf_cris_pcrel_relocs_copied *p; | |
2594 | ||
2595 | eh = (struct elf_cris_link_hash_entry *) h; | |
2596 | ||
2597 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
2598 | if (p->section == sreloc) | |
2599 | break; | |
2600 | ||
2601 | if (p == NULL) | |
2602 | { | |
2603 | p = ((struct elf_cris_pcrel_relocs_copied *) | |
2604 | bfd_alloc (dynobj, sizeof *p)); | |
2605 | if (p == NULL) | |
2606 | return false; | |
2607 | p->next = eh->pcrel_relocs_copied; | |
2608 | eh->pcrel_relocs_copied = p; | |
2609 | p->section = sreloc; | |
2610 | p->count = 0; | |
2611 | } | |
2612 | ||
2613 | ++p->count; | |
2614 | } | |
2615 | break; | |
2616 | ||
06c15ad7 HPN |
2617 | /* This relocation describes the C++ object vtable hierarchy. |
2618 | Reconstruct it for later use during GC. */ | |
2619 | case R_CRIS_GNU_VTINHERIT: | |
2620 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2621 | return false; | |
2622 | break; | |
a7c10850 | 2623 | |
06c15ad7 HPN |
2624 | /* This relocation describes which C++ vtable entries are actually |
2625 | used. Record for later use during GC. */ | |
2626 | case R_CRIS_GNU_VTENTRY: | |
2627 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
2628 | return false; | |
2629 | break; | |
4d96d128 HPN |
2630 | |
2631 | default: | |
2632 | /* Other relocs do not appear here. */ | |
2633 | bfd_set_error (bfd_error_bad_value); | |
2634 | return false; | |
06c15ad7 HPN |
2635 | } |
2636 | } | |
a7c10850 | 2637 | |
06c15ad7 HPN |
2638 | return true; |
2639 | } | |
4da81684 | 2640 | |
915e5146 HPN |
2641 | /* Set the sizes of the dynamic sections. */ |
2642 | ||
2643 | static boolean | |
2644 | elf_cris_size_dynamic_sections (output_bfd, info) | |
2645 | bfd *output_bfd; | |
2646 | struct bfd_link_info *info; | |
2647 | { | |
2648 | bfd *dynobj; | |
2649 | asection *s; | |
2650 | boolean plt; | |
2651 | boolean relocs; | |
2652 | boolean reltext; | |
2653 | ||
2654 | dynobj = elf_hash_table (info)->dynobj; | |
2655 | BFD_ASSERT (dynobj != NULL); | |
2656 | ||
2657 | if (elf_hash_table (info)->dynamic_sections_created) | |
2658 | { | |
2659 | /* Set the contents of the .interp section to the interpreter. */ | |
2660 | if (!info->shared) | |
2661 | { | |
2662 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2663 | BFD_ASSERT (s != NULL); | |
2664 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
2665 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2666 | } | |
2667 | } | |
2668 | else | |
2669 | { | |
2670 | /* Adjust all expected GOTPLT uses to use a GOT entry instead. */ | |
2671 | elf_cris_link_hash_traverse (elf_cris_hash_table (info), | |
2672 | elf_cris_adjust_gotplt_to_got, | |
2673 | (PTR) info); | |
2674 | ||
2675 | /* We may have created entries in the .rela.got section. | |
2676 | However, if we are not creating the dynamic sections, we will | |
2677 | not actually use these entries. Reset the size of .rela.got, | |
2678 | which will cause it to get stripped from the output file | |
2679 | below. */ | |
2680 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
2681 | if (s != NULL) | |
2682 | s->_raw_size = 0; | |
2683 | } | |
2684 | ||
2685 | /* If this is a -Bsymbolic shared link, then we need to discard all PC | |
2686 | relative relocs against symbols defined in a regular object. We | |
2687 | allocated space for them in the check_relocs routine, but we will not | |
2688 | fill them in in the relocate_section routine. We also discard space | |
2689 | for relocs that have become for local symbols due to symbol | |
4d96d128 HPN |
2690 | visibility changes. For programs, we discard space for relocs for |
2691 | symbols not referenced by any dynamic object. */ | |
915e5146 HPN |
2692 | if (info->shared) |
2693 | elf_cris_link_hash_traverse (elf_cris_hash_table (info), | |
4d96d128 HPN |
2694 | elf_cris_discard_excess_dso_dynamics, |
2695 | (PTR) info); | |
2696 | else | |
2697 | elf_cris_link_hash_traverse (elf_cris_hash_table (info), | |
2698 | elf_cris_discard_excess_program_dynamics, | |
915e5146 HPN |
2699 | (PTR) info); |
2700 | ||
2701 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
2702 | determined the sizes of the various dynamic sections. Allocate | |
2703 | memory for them. */ | |
2704 | plt = false; | |
2705 | relocs = false; | |
2706 | reltext = false; | |
2707 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2708 | { | |
2709 | const char *name; | |
2710 | boolean strip; | |
2711 | ||
2712 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2713 | continue; | |
2714 | ||
2715 | /* It's OK to base decisions on the section name, because none | |
2716 | of the dynobj section names depend upon the input files. */ | |
2717 | name = bfd_get_section_name (dynobj, s); | |
2718 | ||
2719 | strip = false; | |
2720 | ||
2721 | if (strcmp (name, ".plt") == 0) | |
2722 | { | |
2723 | if (s->_raw_size == 0) | |
2724 | { | |
2725 | /* Strip this section if we don't need it; see the | |
2726 | comment below. */ | |
2727 | strip = true; | |
2728 | } | |
2729 | else | |
2730 | { | |
2731 | /* Remember whether there is a PLT. */ | |
2732 | plt = true; | |
2733 | } | |
2734 | } | |
2735 | else if (strncmp (name, ".rela", 5) == 0) | |
2736 | { | |
2737 | if (s->_raw_size == 0) | |
2738 | { | |
2739 | /* If we don't need this section, strip it from the | |
2740 | output file. This is mostly to handle .rela.bss and | |
2741 | .rela.plt. We must create both sections in | |
2742 | create_dynamic_sections, because they must be created | |
2743 | before the linker maps input sections to output | |
2744 | sections. The linker does that before | |
2745 | adjust_dynamic_symbol is called, and it is that | |
2746 | function which decides whether anything needs to go | |
2747 | into these sections. */ | |
2748 | strip = true; | |
2749 | } | |
2750 | else | |
2751 | { | |
2752 | asection *target; | |
2753 | ||
2754 | /* Remember whether there are any reloc sections other | |
2755 | than .rela.plt. */ | |
2756 | if (strcmp (name, ".rela.plt") != 0) | |
2757 | { | |
2758 | const char *outname; | |
2759 | ||
2760 | relocs = true; | |
2761 | ||
2762 | /* If this relocation section applies to a read only | |
2763 | section, then we probably need a DT_TEXTREL entry. | |
2764 | The entries in the .rela.plt section are actually | |
2765 | associated with .got.plt, which we created ourselves | |
2766 | and so know is not readonly. */ | |
2767 | outname = bfd_get_section_name (output_bfd, | |
2768 | s->output_section); | |
2769 | target | |
2770 | = bfd_get_section_by_name (output_bfd, | |
2771 | outname + strlen (".rela")); | |
2772 | ||
2773 | /* We have to test the .text section by name, becase for | |
2774 | some reason it does not have SEC_READONLY set at this | |
2775 | time. That flag is actually set in ldmain.c:main | |
2776 | specifically for ".text" at a time long after this | |
2777 | function is called. FIXME: This might be due to a | |
2778 | general bug. FIXME: Have testcase for this. */ | |
2779 | if (target != NULL | |
2780 | && (target->flags & SEC_ALLOC) != 0 | |
2781 | && ((target->flags & SEC_READONLY) != 0 | |
2782 | || strcmp (outname + strlen (".rela"), | |
2783 | ".text") == 0)) | |
2784 | reltext = true; | |
2785 | } | |
2786 | ||
2787 | /* We use the reloc_count field as a counter if we need | |
2788 | to copy relocs into the output file. */ | |
2789 | s->reloc_count = 0; | |
2790 | } | |
2791 | } | |
2792 | else if (strncmp (name, ".got", 4) != 0) | |
2793 | { | |
2794 | /* It's not one of our sections, so don't allocate space. */ | |
2795 | continue; | |
2796 | } | |
2797 | ||
2798 | if (strip) | |
2799 | { | |
2800 | _bfd_strip_section_from_output (info, s); | |
2801 | continue; | |
2802 | } | |
2803 | ||
2804 | /* Allocate memory for the section contents. We use bfd_zalloc here | |
2805 | in case unused entries are not reclaimed before the section's | |
2806 | contents are written out. This should not happen, but this way | |
2807 | if it does, we will not write out garbage. For reloc sections, | |
2808 | this will make entries have the type R_CRIS_NONE. */ | |
2809 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2810 | if (s->contents == NULL && s->_raw_size != 0) | |
2811 | return false; | |
2812 | } | |
2813 | ||
2814 | if (elf_hash_table (info)->dynamic_sections_created) | |
2815 | { | |
2816 | /* Add some entries to the .dynamic section. We fill in the | |
2817 | values later, in elf_cris_finish_dynamic_sections, but we | |
2818 | must add the entries now so that we get the correct size for | |
2819 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2820 | dynamic linker and used by the debugger. */ | |
2821 | if (!info->shared) | |
2822 | { | |
2823 | if (!bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2824 | return false; | |
2825 | } | |
2826 | ||
2827 | if (plt) | |
2828 | { | |
2829 | if (!bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
2830 | || !bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2831 | || !bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2832 | || !bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
2833 | return false; | |
2834 | } | |
2835 | ||
2836 | if (relocs) | |
2837 | { | |
2838 | if (!bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) | |
2839 | || !bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) | |
2840 | || !bfd_elf32_add_dynamic_entry (info, DT_RELAENT, | |
2841 | sizeof (Elf32_External_Rela))) | |
2842 | return false; | |
2843 | } | |
2844 | ||
2845 | if (reltext) | |
2846 | { | |
2847 | if (!bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2848 | return false; | |
2849 | info->flags |= DF_TEXTREL; | |
2850 | } | |
2851 | } | |
2852 | ||
2853 | return true; | |
2854 | } | |
2855 | ||
2856 | /* This function is called via elf_cris_link_hash_traverse if we are | |
2857 | creating a shared object. In the -Bsymbolic case, it discards the | |
2858 | space allocated to copy PC relative relocs against symbols which | |
2859 | are defined in regular objects. For the normal non-symbolic case, | |
2860 | we also discard space for relocs that have become local due to | |
2861 | symbol visibility changes. We allocated space for them in the | |
2862 | check_relocs routine, but we won't fill them in in the | |
2863 | relocate_section routine. */ | |
2864 | ||
2865 | static boolean | |
4d96d128 | 2866 | elf_cris_discard_excess_dso_dynamics (h, inf) |
915e5146 HPN |
2867 | struct elf_cris_link_hash_entry *h; |
2868 | PTR inf; | |
2869 | { | |
2870 | struct elf_cris_pcrel_relocs_copied *s; | |
2871 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2872 | ||
2873 | /* If a symbol has been forced local or we have found a regular | |
2874 | definition for the symbolic link case, then we won't be needing | |
2875 | any relocs. */ | |
2876 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
2877 | && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
2878 | || info->symbolic)) | |
2879 | { | |
2880 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
4d96d128 HPN |
2881 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela); |
2882 | } | |
2883 | ||
2884 | return true; | |
2885 | } | |
2886 | ||
2887 | /* This function is called via elf_cris_link_hash_traverse if we are *not* | |
2888 | creating a shared object. We discard space for relocs for symbols put | |
2889 | in the .got, but which we found we do not have to resolve at run-time. */ | |
2890 | ||
2891 | static boolean | |
2892 | elf_cris_discard_excess_program_dynamics (h, inf) | |
2893 | struct elf_cris_link_hash_entry *h; | |
2894 | PTR inf; | |
2895 | { | |
2896 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2897 | ||
2898 | /* If we're not creating a shared library and have a symbol which is | |
2899 | referred to by .got references, but the symbol is defined locally, | |
2900 | (or rather, not referred to by a DSO and not defined by a DSO) then | |
2901 | lose the reloc for the .got (don't allocate room for it). */ | |
2902 | if ((h->root.elf_link_hash_flags | |
2903 | & (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_DEF_DYNAMIC)) == 0) | |
2904 | { | |
2905 | if (h->root.got.refcount > 0 | |
2906 | /* The size of this section is only valid and in sync with the | |
2907 | various reference counts if we do dynamic; don't decrement it | |
2908 | otherwise. */ | |
2909 | && elf_hash_table (info)->dynamic_sections_created) | |
2910 | { | |
2911 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
2912 | asection *srelgot; | |
2913 | ||
2914 | BFD_ASSERT (dynobj != NULL); | |
99c79b2e | 2915 | |
4d96d128 HPN |
2916 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
2917 | ||
2918 | BFD_ASSERT (srelgot != NULL); | |
2919 | ||
2920 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
2921 | } | |
2922 | ||
2923 | /* If the locally-defined symbol isn't used by a DSO, then we don't | |
2924 | have to export it as a dynamic symbol. This was already done for | |
2925 | functions; doing this for all symbols would presumably not | |
2926 | introduce new problems. */ | |
2927 | h->root.dynindx = -1; | |
915e5146 HPN |
2928 | } |
2929 | ||
2930 | return true; | |
2931 | } | |
2932 | ||
2933 | /* Reject a file depending on presence and expectation of prefixed | |
2934 | underscores on symbols. */ | |
4da81684 HPN |
2935 | |
2936 | static boolean | |
2937 | cris_elf_object_p (abfd) | |
2938 | bfd *abfd; | |
2939 | { | |
2940 | if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)) | |
2941 | return (bfd_get_symbol_leading_char (abfd) == '_'); | |
2942 | else | |
2943 | return (bfd_get_symbol_leading_char (abfd) == 0); | |
2944 | } | |
2945 | ||
2946 | /* Mark presence or absence of leading underscore. */ | |
2947 | ||
2948 | static void | |
2949 | cris_elf_final_write_processing (abfd, linker) | |
2950 | bfd *abfd; | |
2951 | boolean linker ATTRIBUTE_UNUSED; | |
2952 | { | |
2953 | if (bfd_get_symbol_leading_char (abfd) == '_') | |
2954 | elf_elfheader (abfd)->e_flags |= EF_CRIS_UNDERSCORE; | |
2955 | else | |
2956 | elf_elfheader (abfd)->e_flags &= ~EF_CRIS_UNDERSCORE; | |
2957 | } | |
2958 | ||
2959 | /* Display the flags field. */ | |
2960 | ||
2961 | static boolean | |
2962 | cris_elf_print_private_bfd_data (abfd, ptr) | |
2963 | bfd *abfd; | |
2964 | PTR ptr; | |
2965 | { | |
2966 | FILE *file = (FILE *) ptr; | |
2967 | ||
2968 | BFD_ASSERT (abfd != NULL && ptr != NULL) | |
2969 | ||
2970 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
2971 | ||
2972 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
2973 | ||
2974 | if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE) | |
2975 | fprintf (file, _(" [symbols have a _ prefix]")); | |
2976 | ||
2977 | fputc ('\n', file); | |
2978 | return true; | |
2979 | } | |
2980 | ||
2981 | /* Don't mix files with and without a leading underscore. */ | |
2982 | ||
2983 | static boolean | |
2984 | cris_elf_merge_private_bfd_data (ibfd, obfd) | |
2985 | bfd *ibfd; | |
2986 | bfd *obfd; | |
2987 | { | |
2988 | flagword old_flags, new_flags; | |
2989 | ||
2990 | if (_bfd_generic_verify_endian_match (ibfd, obfd) == false) | |
2991 | return false; | |
2992 | ||
2993 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2994 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2995 | return true; | |
2996 | ||
2997 | if (! elf_flags_init (obfd)) | |
2998 | { | |
2999 | /* This happens when ld starts out with a 'blank' output file. */ | |
3000 | elf_flags_init (obfd) = true; | |
3001 | ||
3002 | /* Set flags according to current bfd_target. */ | |
3003 | cris_elf_final_write_processing (obfd, false); | |
3004 | } | |
3005 | ||
3006 | old_flags = elf_elfheader (obfd)->e_flags; | |
3007 | new_flags = elf_elfheader (ibfd)->e_flags; | |
3008 | ||
3009 | /* Is this good or bad? We'll follow with other excluding flags. */ | |
3010 | if ((old_flags & EF_CRIS_UNDERSCORE) != (new_flags & EF_CRIS_UNDERSCORE)) | |
3011 | { | |
3012 | (*_bfd_error_handler) | |
3013 | ((new_flags & EF_CRIS_UNDERSCORE) | |
3014 | ? _("%s: uses _-prefixed symbols, but writing file with non-prefixed symbols") | |
3015 | : _("%s: uses non-prefixed symbols, but writing file with _-prefixed symbols"), | |
3016 | bfd_get_filename (ibfd)); | |
3017 | bfd_set_error (bfd_error_bad_value); | |
3018 | return false; | |
3019 | } | |
3020 | ||
3021 | return true; | |
3022 | } | |
06c15ad7 HPN |
3023 | \f |
3024 | #define ELF_ARCH bfd_arch_cris | |
3025 | #define ELF_MACHINE_CODE EM_CRIS | |
3026 | #define ELF_MAXPAGESIZE 0x2000 | |
3027 | ||
3028 | #define TARGET_LITTLE_SYM bfd_elf32_cris_vec | |
3029 | #define TARGET_LITTLE_NAME "elf32-cris" | |
4da81684 | 3030 | #define elf_symbol_leading_char 0 |
06c15ad7 HPN |
3031 | |
3032 | #define elf_info_to_howto_rel NULL | |
3033 | #define elf_info_to_howto cris_info_to_howto_rela | |
3034 | #define elf_backend_relocate_section cris_elf_relocate_section | |
3035 | #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook | |
3036 | #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook | |
3037 | #define elf_backend_check_relocs cris_elf_check_relocs | |
3038 | ||
3039 | #define elf_backend_can_gc_sections 1 | |
3040 | ||
4da81684 HPN |
3041 | #define elf_backend_object_p cris_elf_object_p |
3042 | #define elf_backend_final_write_processing \ | |
3043 | cris_elf_final_write_processing | |
3044 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
3045 | cris_elf_print_private_bfd_data | |
3046 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
3047 | cris_elf_merge_private_bfd_data | |
3048 | ||
06c15ad7 HPN |
3049 | #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup |
3050 | ||
915e5146 HPN |
3051 | #define bfd_elf32_bfd_link_hash_table_create \ |
3052 | elf_cris_link_hash_table_create | |
3053 | #define elf_backend_adjust_dynamic_symbol \ | |
3054 | elf_cris_adjust_dynamic_symbol | |
3055 | #define elf_backend_size_dynamic_sections \ | |
3056 | elf_cris_size_dynamic_sections | |
3057 | #define elf_backend_finish_dynamic_symbol \ | |
3058 | elf_cris_finish_dynamic_symbol | |
3059 | #define elf_backend_finish_dynamic_sections \ | |
3060 | elf_cris_finish_dynamic_sections | |
3061 | #define elf_backend_create_dynamic_sections \ | |
3062 | _bfd_elf_create_dynamic_sections | |
3063 | #define bfd_elf32_bfd_final_link \ | |
3064 | _bfd_elf32_gc_common_final_link | |
3065 | #define elf_backend_hide_symbol elf_cris_hide_symbol | |
3066 | ||
3067 | #define elf_backend_want_got_plt 1 | |
3068 | #define elf_backend_plt_readonly 1 | |
3069 | #define elf_backend_want_plt_sym 0 | |
3070 | #define elf_backend_got_header_size 12 | |
3071 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
3072 | ||
06c15ad7 HPN |
3073 | /* Later, we my want to optimize RELA entries into REL entries for dynamic |
3074 | linking and libraries (if it's a win of any significance). Until then, | |
3075 | take the easy route. */ | |
3076 | #define elf_backend_may_use_rel_p 0 | |
3077 | #define elf_backend_may_use_rela_p 1 | |
3078 | ||
3079 | #include "elf32-target.h" | |
4da81684 HPN |
3080 | |
3081 | #define INCLUDED_TARGET_FILE | |
3082 | ||
3083 | #undef TARGET_LITTLE_SYM | |
3084 | #undef TARGET_LITTLE_NAME | |
3085 | #undef elf_symbol_leading_char | |
3086 | ||
3087 | #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec | |
3088 | #define TARGET_LITTLE_NAME "elf32-us-cris" | |
3089 | #define elf_symbol_leading_char '_' | |
3090 | ||
3091 | #include "elf32-target.h" |