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252b5132 RH |
1 | /* V850-specific support for 32-bit ELF |
2 | Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | ||
21 | ||
22 | /* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char | |
23 | dependencies. As is the gas & simulator code or the v850. */ | |
24 | ||
25 | ||
26 | #include "bfd.h" | |
27 | #include "sysdep.h" | |
28 | #include "bfdlink.h" | |
29 | #include "libbfd.h" | |
30 | #include "elf-bfd.h" | |
31 | #include "elf/v850.h" | |
32 | ||
33 | /* sign-extend a 24-bit number */ | |
34 | #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000) | |
35 | ||
36 | static reloc_howto_type *v850_elf_reloc_type_lookup | |
37 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
38 | static void v850_elf_info_to_howto_rel | |
39 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
40 | static void v850_elf_info_to_howto_rela | |
41 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
42 | static bfd_reloc_status_type v850_elf_reloc | |
43 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
44 | static boolean v850_elf_is_local_label_name | |
45 | PARAMS ((bfd *, const char *)); | |
46 | static boolean v850_elf_relocate_section | |
47 | PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
48 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
49 | static bfd_reloc_status_type v850_elf_perform_relocation | |
50 | PARAMS ((bfd *, int, bfd_vma, bfd_byte *)); | |
51 | static boolean v850_elf_check_relocs | |
52 | PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); | |
53 | static void remember_hi16s_reloc | |
54 | PARAMS ((bfd *, bfd_vma, bfd_byte *)); | |
55 | static bfd_byte * find_remembered_hi16s_reloc | |
56 | PARAMS ((bfd_vma, boolean *)); | |
57 | static bfd_reloc_status_type v850_elf_final_link_relocate | |
58 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, bfd_vma, | |
59 | bfd_vma, bfd_vma, struct bfd_link_info *, asection *, int)); | |
60 | static boolean v850_elf_object_p | |
61 | PARAMS ((bfd *)); | |
62 | static boolean v850_elf_fake_sections | |
63 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); | |
64 | static void v850_elf_final_write_processing | |
65 | PARAMS ((bfd *, boolean)); | |
66 | static boolean v850_elf_set_private_flags | |
67 | PARAMS ((bfd *, flagword)); | |
68 | static boolean v850_elf_copy_private_bfd_data | |
69 | PARAMS ((bfd *, bfd *)); | |
70 | static boolean v850_elf_merge_private_bfd_data | |
71 | PARAMS ((bfd *, bfd *)); | |
72 | static boolean v850_elf_print_private_bfd_data | |
73 | PARAMS ((bfd *, PTR)); | |
74 | static boolean v850_elf_section_from_bfd_section | |
75 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *)); | |
76 | static void v850_elf_symbol_processing | |
77 | PARAMS ((bfd *, asymbol *)); | |
78 | static boolean v850_elf_add_symbol_hook | |
79 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
80 | const char **, flagword *, asection **, bfd_vma *)); | |
81 | static boolean v850_elf_link_output_symbol_hook | |
82 | PARAMS ((bfd *, struct bfd_link_info *, const char *, | |
83 | Elf_Internal_Sym *, asection *)); | |
84 | static boolean v850_elf_section_from_shdr | |
85 | PARAMS ((bfd *, Elf_Internal_Shdr *, char *)); | |
86 | ||
87 | /* Note: It is REQUIRED that the 'type' value of each entry in this array | |
88 | match the index of the entry in the array. */ | |
89 | static reloc_howto_type v850_elf_howto_table[] = | |
90 | { | |
91 | /* This reloc does nothing. */ | |
92 | HOWTO (R_V850_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_V850_NONE", /* name */ | |
101 | false, /* partial_inplace */ | |
102 | 0, /* src_mask */ | |
103 | 0, /* dst_mask */ | |
104 | false), /* pcrel_offset */ | |
105 | ||
106 | /* A PC relative 9 bit branch. */ | |
107 | HOWTO (R_V850_9_PCREL, /* type */ | |
108 | 2, /* rightshift */ | |
109 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
110 | 26, /* bitsize */ | |
111 | true, /* pc_relative */ | |
112 | 0, /* bitpos */ | |
113 | complain_overflow_bitfield, /* complain_on_overflow */ | |
114 | v850_elf_reloc, /* special_function */ | |
115 | "R_V850_9_PCREL", /* name */ | |
116 | false, /* partial_inplace */ | |
117 | 0x00ffffff, /* src_mask */ | |
118 | 0x00ffffff, /* dst_mask */ | |
119 | true), /* pcrel_offset */ | |
120 | ||
121 | /* A PC relative 22 bit branch. */ | |
122 | HOWTO (R_V850_22_PCREL, /* type */ | |
123 | 2, /* rightshift */ | |
124 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
125 | 22, /* bitsize */ | |
126 | true, /* pc_relative */ | |
127 | 7, /* bitpos */ | |
128 | complain_overflow_signed, /* complain_on_overflow */ | |
129 | v850_elf_reloc, /* special_function */ | |
130 | "R_V850_22_PCREL", /* name */ | |
131 | false, /* partial_inplace */ | |
132 | 0x07ffff80, /* src_mask */ | |
133 | 0x07ffff80, /* dst_mask */ | |
134 | true), /* pcrel_offset */ | |
135 | ||
136 | /* High 16 bits of symbol value. */ | |
137 | HOWTO (R_V850_HI16_S, /* type */ | |
138 | 0, /* rightshift */ | |
139 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
140 | 16, /* bitsize */ | |
141 | false, /* pc_relative */ | |
142 | 0, /* bitpos */ | |
143 | complain_overflow_dont, /* complain_on_overflow */ | |
144 | v850_elf_reloc, /* special_function */ | |
145 | "R_V850_HI16_S", /* name */ | |
146 | true, /* partial_inplace */ | |
147 | 0xffff, /* src_mask */ | |
148 | 0xffff, /* dst_mask */ | |
149 | false), /* pcrel_offset */ | |
150 | ||
151 | /* High 16 bits of symbol value. */ | |
152 | HOWTO (R_V850_HI16, /* type */ | |
153 | 0, /* rightshift */ | |
154 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 16, /* bitsize */ | |
156 | false, /* pc_relative */ | |
157 | 0, /* bitpos */ | |
158 | complain_overflow_dont, /* complain_on_overflow */ | |
159 | v850_elf_reloc, /* special_function */ | |
160 | "R_V850_HI16", /* name */ | |
161 | true, /* partial_inplace */ | |
162 | 0xffff, /* src_mask */ | |
163 | 0xffff, /* dst_mask */ | |
164 | false), /* pcrel_offset */ | |
165 | ||
166 | /* Low 16 bits of symbol value. */ | |
167 | HOWTO (R_V850_LO16, /* type */ | |
168 | 0, /* rightshift */ | |
169 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
170 | 16, /* bitsize */ | |
171 | false, /* pc_relative */ | |
172 | 0, /* bitpos */ | |
173 | complain_overflow_dont, /* complain_on_overflow */ | |
174 | v850_elf_reloc, /* special_function */ | |
175 | "R_V850_LO16", /* name */ | |
176 | true, /* partial_inplace */ | |
177 | 0xffff, /* src_mask */ | |
178 | 0xffff, /* dst_mask */ | |
179 | false), /* pcrel_offset */ | |
180 | ||
181 | /* Simple 32bit reloc. */ | |
182 | HOWTO (R_V850_32, /* type */ | |
183 | 0, /* rightshift */ | |
184 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
185 | 32, /* bitsize */ | |
186 | false, /* pc_relative */ | |
187 | 0, /* bitpos */ | |
188 | complain_overflow_dont, /* complain_on_overflow */ | |
189 | v850_elf_reloc, /* special_function */ | |
190 | "R_V850_32", /* name */ | |
191 | true, /* partial_inplace */ | |
192 | 0xffffffff, /* src_mask */ | |
193 | 0xffffffff, /* dst_mask */ | |
194 | false), /* pcrel_offset */ | |
195 | ||
196 | /* Simple 16bit reloc. */ | |
197 | HOWTO (R_V850_16, /* type */ | |
198 | 0, /* rightshift */ | |
199 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
200 | 16, /* bitsize */ | |
201 | false, /* pc_relative */ | |
202 | 0, /* bitpos */ | |
203 | complain_overflow_dont, /* complain_on_overflow */ | |
204 | bfd_elf_generic_reloc, /* special_function */ | |
205 | "R_V850_16", /* name */ | |
206 | true, /* partial_inplace */ | |
207 | 0xffff, /* src_mask */ | |
208 | 0xffff, /* dst_mask */ | |
209 | false), /* pcrel_offset */ | |
210 | ||
211 | /* Simple 8bit reloc. */ | |
212 | HOWTO (R_V850_8, /* type */ | |
213 | 0, /* rightshift */ | |
214 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
215 | 8, /* bitsize */ | |
216 | false, /* pc_relative */ | |
217 | 0, /* bitpos */ | |
218 | complain_overflow_dont, /* complain_on_overflow */ | |
219 | bfd_elf_generic_reloc, /* special_function */ | |
220 | "R_V850_8", /* name */ | |
221 | true, /* partial_inplace */ | |
222 | 0xff, /* src_mask */ | |
223 | 0xff, /* dst_mask */ | |
224 | false), /* pcrel_offset */ | |
225 | ||
226 | /* 16 bit offset from the short data area pointer. */ | |
227 | HOWTO (R_V850_SDA_16_16_OFFSET, /* type */ | |
228 | 0, /* rightshift */ | |
229 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
230 | 16, /* bitsize */ | |
231 | false, /* pc_relative */ | |
232 | 0, /* bitpos */ | |
233 | complain_overflow_dont, /* complain_on_overflow */ | |
234 | v850_elf_reloc, /* special_function */ | |
235 | "R_V850_SDA_16_16_OFFSET", /* name */ | |
236 | false, /* partial_inplace */ | |
237 | 0xffff, /* src_mask */ | |
238 | 0xffff, /* dst_mask */ | |
239 | false), /* pcrel_offset */ | |
240 | ||
241 | /* 15 bit offset from the short data area pointer. */ | |
242 | HOWTO (R_V850_SDA_15_16_OFFSET, /* type */ | |
243 | 1, /* rightshift */ | |
244 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
245 | 16, /* bitsize */ | |
246 | false, /* pc_relative */ | |
247 | 1, /* bitpos */ | |
248 | complain_overflow_dont, /* complain_on_overflow */ | |
249 | v850_elf_reloc, /* special_function */ | |
250 | "R_V850_SDA_15_16_OFFSET", /* name */ | |
251 | false, /* partial_inplace */ | |
252 | 0xfffe, /* src_mask */ | |
253 | 0xfffe, /* dst_mask */ | |
254 | false), /* pcrel_offset */ | |
255 | ||
256 | /* 16 bit offset from the zero data area pointer. */ | |
257 | HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */ | |
258 | 0, /* rightshift */ | |
259 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
260 | 16, /* bitsize */ | |
261 | false, /* pc_relative */ | |
262 | 0, /* bitpos */ | |
263 | complain_overflow_dont, /* complain_on_overflow */ | |
264 | v850_elf_reloc, /* special_function */ | |
265 | "R_V850_ZDA_16_16_OFFSET", /* name */ | |
266 | false, /* partial_inplace */ | |
267 | 0xffff, /* src_mask */ | |
268 | 0xffff, /* dst_mask */ | |
269 | false), /* pcrel_offset */ | |
270 | ||
271 | /* 15 bit offset from the zero data area pointer. */ | |
272 | HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */ | |
273 | 1, /* rightshift */ | |
274 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
275 | 16, /* bitsize */ | |
276 | false, /* pc_relative */ | |
277 | 1, /* bitpos */ | |
278 | complain_overflow_dont, /* complain_on_overflow */ | |
279 | v850_elf_reloc, /* special_function */ | |
280 | "R_V850_ZDA_15_16_OFFSET", /* name */ | |
281 | false, /* partial_inplace */ | |
282 | 0xfffe, /* src_mask */ | |
283 | 0xfffe, /* dst_mask */ | |
284 | false), /* pcrel_offset */ | |
285 | ||
286 | /* 6 bit offset from the tiny data area pointer. */ | |
287 | HOWTO (R_V850_TDA_6_8_OFFSET, /* type */ | |
288 | 2, /* rightshift */ | |
289 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
290 | 8, /* bitsize */ | |
291 | false, /* pc_relative */ | |
292 | 1, /* bitpos */ | |
293 | complain_overflow_dont, /* complain_on_overflow */ | |
294 | v850_elf_reloc, /* special_function */ | |
295 | "R_V850_TDA_6_8_OFFSET", /* name */ | |
296 | false, /* partial_inplace */ | |
297 | 0x7e, /* src_mask */ | |
298 | 0x7e, /* dst_mask */ | |
299 | false), /* pcrel_offset */ | |
300 | ||
301 | /* 8 bit offset from the tiny data area pointer. */ | |
302 | HOWTO (R_V850_TDA_7_8_OFFSET, /* type */ | |
303 | 1, /* rightshift */ | |
304 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
305 | 8, /* bitsize */ | |
306 | false, /* pc_relative */ | |
307 | 0, /* bitpos */ | |
308 | complain_overflow_dont, /* complain_on_overflow */ | |
309 | v850_elf_reloc, /* special_function */ | |
310 | "R_V850_TDA_7_8_OFFSET", /* name */ | |
311 | false, /* partial_inplace */ | |
312 | 0x7f, /* src_mask */ | |
313 | 0x7f, /* dst_mask */ | |
314 | false), /* pcrel_offset */ | |
315 | ||
316 | /* 7 bit offset from the tiny data area pointer. */ | |
317 | HOWTO (R_V850_TDA_7_7_OFFSET, /* type */ | |
318 | 0, /* rightshift */ | |
319 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
320 | 7, /* bitsize */ | |
321 | false, /* pc_relative */ | |
322 | 0, /* bitpos */ | |
323 | complain_overflow_dont, /* complain_on_overflow */ | |
324 | v850_elf_reloc, /* special_function */ | |
325 | "R_V850_TDA_7_7_OFFSET", /* name */ | |
326 | false, /* partial_inplace */ | |
327 | 0x7f, /* src_mask */ | |
328 | 0x7f, /* dst_mask */ | |
329 | false), /* pcrel_offset */ | |
330 | ||
331 | /* 16 bit offset from the tiny data area pointer! */ | |
332 | HOWTO (R_V850_TDA_16_16_OFFSET, /* type */ | |
333 | 0, /* rightshift */ | |
334 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
335 | 16, /* bitsize */ | |
336 | false, /* pc_relative */ | |
337 | 0, /* bitpos */ | |
338 | complain_overflow_dont, /* complain_on_overflow */ | |
339 | v850_elf_reloc, /* special_function */ | |
340 | "R_V850_TDA_16_16_OFFSET", /* name */ | |
341 | false, /* partial_inplace */ | |
342 | 0xffff, /* src_mask */ | |
343 | 0xfff, /* dst_mask */ | |
344 | false), /* pcrel_offset */ | |
345 | ||
346 | /* 5 bit offset from the tiny data area pointer. */ | |
347 | HOWTO (R_V850_TDA_4_5_OFFSET, /* type */ | |
348 | 1, /* rightshift */ | |
349 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
350 | 5, /* bitsize */ | |
351 | false, /* pc_relative */ | |
352 | 0, /* bitpos */ | |
353 | complain_overflow_dont, /* complain_on_overflow */ | |
354 | v850_elf_reloc, /* special_function */ | |
355 | "R_V850_TDA_4_5_OFFSET", /* name */ | |
356 | false, /* partial_inplace */ | |
357 | 0x0f, /* src_mask */ | |
358 | 0x0f, /* dst_mask */ | |
359 | false), /* pcrel_offset */ | |
360 | ||
361 | /* 4 bit offset from the tiny data area pointer. */ | |
362 | HOWTO (R_V850_TDA_4_4_OFFSET, /* type */ | |
363 | 0, /* rightshift */ | |
364 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
365 | 4, /* bitsize */ | |
366 | false, /* pc_relative */ | |
367 | 0, /* bitpos */ | |
368 | complain_overflow_dont, /* complain_on_overflow */ | |
369 | v850_elf_reloc, /* special_function */ | |
370 | "R_V850_TDA_4_4_OFFSET", /* name */ | |
371 | false, /* partial_inplace */ | |
372 | 0x0f, /* src_mask */ | |
373 | 0x0f, /* dst_mask */ | |
374 | false), /* pcrel_offset */ | |
375 | ||
376 | /* 16 bit offset from the short data area pointer. */ | |
377 | HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */ | |
378 | 0, /* rightshift */ | |
379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
380 | 16, /* bitsize */ | |
381 | false, /* pc_relative */ | |
382 | 0, /* bitpos */ | |
383 | complain_overflow_dont, /* complain_on_overflow */ | |
384 | v850_elf_reloc, /* special_function */ | |
385 | "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */ | |
386 | false, /* partial_inplace */ | |
387 | 0xfffe0020, /* src_mask */ | |
388 | 0xfffe0020, /* dst_mask */ | |
389 | false), /* pcrel_offset */ | |
390 | ||
391 | /* 16 bit offset from the zero data area pointer. */ | |
392 | HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */ | |
393 | 0, /* rightshift */ | |
394 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
395 | 16, /* bitsize */ | |
396 | false, /* pc_relative */ | |
397 | 0, /* bitpos */ | |
398 | complain_overflow_dont, /* complain_on_overflow */ | |
399 | v850_elf_reloc, /* special_function */ | |
400 | "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */ | |
401 | false, /* partial_inplace */ | |
402 | 0xfffe0020, /* src_mask */ | |
403 | 0xfffe0020, /* dst_mask */ | |
404 | false), /* pcrel_offset */ | |
405 | ||
406 | /* 6 bit offset from the call table base pointer. */ | |
407 | HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */ | |
408 | 0, /* rightshift */ | |
409 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
410 | 7, /* bitsize */ | |
411 | false, /* pc_relative */ | |
412 | 0, /* bitpos */ | |
413 | complain_overflow_dont, /* complain_on_overflow */ | |
414 | v850_elf_reloc, /* special_function */ | |
415 | "R_V850_CALLT_6_7_OFFSET", /* name */ | |
416 | false, /* partial_inplace */ | |
417 | 0x3f, /* src_mask */ | |
418 | 0x3f, /* dst_mask */ | |
419 | false), /* pcrel_offset */ | |
420 | ||
421 | /* 16 bit offset from the call table base pointer. */ | |
422 | HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */ | |
423 | 0, /* rightshift */ | |
424 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
425 | 16, /* bitsize */ | |
426 | false, /* pc_relative */ | |
427 | 0, /* bitpos */ | |
428 | complain_overflow_dont, /* complain_on_overflow */ | |
429 | v850_elf_reloc, /* special_function */ | |
430 | "R_V850_CALLT_16_16_OFFSET", /* name */ | |
431 | false, /* partial_inplace */ | |
432 | 0xffff, /* src_mask */ | |
433 | 0xffff, /* dst_mask */ | |
434 | false), /* pcrel_offset */ | |
435 | ||
436 | /* GNU extension to record C++ vtable hierarchy */ | |
437 | HOWTO (R_V850_GNU_VTINHERIT, /* type */ | |
438 | 0, /* rightshift */ | |
439 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
440 | 0, /* bitsize */ | |
441 | false, /* pc_relative */ | |
442 | 0, /* bitpos */ | |
443 | complain_overflow_dont, /* complain_on_overflow */ | |
444 | NULL, /* special_function */ | |
445 | "R_V850_GNU_VTINHERIT", /* name */ | |
446 | false, /* partial_inplace */ | |
447 | 0, /* src_mask */ | |
448 | 0, /* dst_mask */ | |
449 | false), /* pcrel_offset */ | |
450 | ||
451 | /* GNU extension to record C++ vtable member usage */ | |
452 | HOWTO (R_V850_GNU_VTENTRY, /* type */ | |
453 | 0, /* rightshift */ | |
454 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
455 | 0, /* bitsize */ | |
456 | false, /* pc_relative */ | |
457 | 0, /* bitpos */ | |
458 | complain_overflow_dont, /* complain_on_overflow */ | |
459 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
460 | "R_V850_GNU_VTENTRY", /* name */ | |
461 | false, /* partial_inplace */ | |
462 | 0, /* src_mask */ | |
463 | 0, /* dst_mask */ | |
464 | false), /* pcrel_offset */ | |
465 | ||
466 | }; | |
467 | ||
468 | /* Map BFD reloc types to V850 ELF reloc types. */ | |
469 | ||
470 | struct v850_elf_reloc_map | |
471 | { | |
472 | /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an | |
473 | unsigned char. */ | |
474 | bfd_reloc_code_real_type bfd_reloc_val; | |
475 | unsigned char elf_reloc_val; | |
476 | }; | |
477 | ||
478 | static const struct v850_elf_reloc_map v850_elf_reloc_map[] = | |
479 | { | |
480 | { BFD_RELOC_NONE, R_V850_NONE }, | |
481 | { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL }, | |
482 | { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL }, | |
483 | { BFD_RELOC_HI16_S, R_V850_HI16_S }, | |
484 | { BFD_RELOC_HI16, R_V850_HI16 }, | |
485 | { BFD_RELOC_LO16, R_V850_LO16 }, | |
486 | { BFD_RELOC_32, R_V850_32 }, | |
487 | { BFD_RELOC_16, R_V850_16 }, | |
488 | { BFD_RELOC_8, R_V850_8 }, | |
489 | { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET }, | |
490 | { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET }, | |
491 | { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET }, | |
492 | { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET }, | |
493 | { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET }, | |
494 | { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET }, | |
495 | { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET }, | |
496 | { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET }, | |
497 | { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET }, | |
498 | { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET }, | |
499 | { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET }, | |
500 | { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET }, | |
501 | { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET }, | |
502 | { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET }, | |
503 | { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT }, | |
504 | { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY }, | |
505 | ||
506 | }; | |
507 | ||
508 | \f | |
509 | /* Map a bfd relocation into the appropriate howto structure */ | |
510 | static reloc_howto_type * | |
511 | v850_elf_reloc_type_lookup (abfd, code) | |
512 | bfd * abfd; | |
513 | bfd_reloc_code_real_type code; | |
514 | { | |
515 | unsigned int i; | |
516 | ||
517 | for (i = 0; | |
518 | i < sizeof (v850_elf_reloc_map) / sizeof (struct v850_elf_reloc_map); | |
519 | i++) | |
520 | { | |
521 | if (v850_elf_reloc_map[i].bfd_reloc_val == code) | |
522 | { | |
523 | BFD_ASSERT (v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val].type == v850_elf_reloc_map[i].elf_reloc_val); | |
524 | ||
525 | return & v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val]; | |
526 | } | |
527 | } | |
528 | ||
529 | return NULL; | |
530 | } | |
531 | ||
532 | \f | |
533 | /* Set the howto pointer for an V850 ELF reloc. */ | |
534 | static void | |
535 | v850_elf_info_to_howto_rel (abfd, cache_ptr, dst) | |
536 | bfd * abfd; | |
537 | arelent * cache_ptr; | |
538 | Elf32_Internal_Rel * dst; | |
539 | { | |
540 | unsigned int r_type; | |
541 | ||
542 | r_type = ELF32_R_TYPE (dst->r_info); | |
543 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); | |
544 | cache_ptr->howto = &v850_elf_howto_table[r_type]; | |
545 | } | |
546 | ||
547 | /* Set the howto pointer for a V850 ELF reloc (type RELA). */ | |
548 | static void | |
549 | v850_elf_info_to_howto_rela (abfd, cache_ptr, dst) | |
550 | bfd * abfd; | |
551 | arelent * cache_ptr; | |
552 | Elf32_Internal_Rela *dst; | |
553 | { | |
554 | unsigned int r_type; | |
555 | ||
556 | r_type = ELF32_R_TYPE (dst->r_info); | |
557 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); | |
558 | cache_ptr->howto = &v850_elf_howto_table[r_type]; | |
559 | } | |
560 | ||
561 | \f | |
562 | /* Look through the relocs for a section during the first phase, and | |
563 | allocate space in the global offset table or procedure linkage | |
564 | table. */ | |
565 | ||
566 | static boolean | |
567 | v850_elf_check_relocs (abfd, info, sec, relocs) | |
568 | bfd * abfd; | |
569 | struct bfd_link_info * info; | |
570 | asection * sec; | |
571 | const Elf_Internal_Rela * relocs; | |
572 | { | |
573 | boolean ret = true; | |
574 | bfd *dynobj; | |
575 | Elf_Internal_Shdr *symtab_hdr; | |
576 | struct elf_link_hash_entry **sym_hashes; | |
577 | const Elf_Internal_Rela *rel; | |
578 | const Elf_Internal_Rela *rel_end; | |
579 | asection *sreloc; | |
580 | enum v850_reloc_type r_type; | |
581 | int other = 0; | |
582 | const char *common = (const char *)0; | |
583 | ||
584 | if (info->relocateable) | |
585 | return true; | |
586 | ||
587 | #ifdef DEBUG | |
588 | fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n", | |
589 | bfd_get_section_name (abfd, sec), | |
590 | bfd_get_filename (abfd)); | |
591 | #endif | |
592 | ||
593 | dynobj = elf_hash_table (info)->dynobj; | |
594 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
595 | sym_hashes = elf_sym_hashes (abfd); | |
596 | sreloc = NULL; | |
597 | ||
598 | rel_end = relocs + sec->reloc_count; | |
599 | for (rel = relocs; rel < rel_end; rel++) | |
600 | { | |
601 | unsigned long r_symndx; | |
602 | struct elf_link_hash_entry *h; | |
603 | ||
604 | r_symndx = ELF32_R_SYM (rel->r_info); | |
605 | if (r_symndx < symtab_hdr->sh_info) | |
606 | h = NULL; | |
607 | else | |
608 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
609 | ||
610 | r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info); | |
611 | switch (r_type) | |
612 | { | |
613 | default: | |
614 | case R_V850_NONE: | |
615 | case R_V850_9_PCREL: | |
616 | case R_V850_22_PCREL: | |
617 | case R_V850_HI16_S: | |
618 | case R_V850_HI16: | |
619 | case R_V850_LO16: | |
620 | case R_V850_32: | |
621 | case R_V850_16: | |
622 | case R_V850_8: | |
623 | case R_V850_CALLT_6_7_OFFSET: | |
624 | case R_V850_CALLT_16_16_OFFSET: | |
625 | break; | |
626 | ||
627 | /* This relocation describes the C++ object vtable hierarchy. | |
628 | Reconstruct it for later use during GC. */ | |
629 | case R_V850_GNU_VTINHERIT: | |
630 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
631 | return false; | |
632 | break; | |
633 | ||
634 | /* This relocation describes which C++ vtable entries are actually | |
635 | used. Record for later use during GC. */ | |
636 | case R_V850_GNU_VTENTRY: | |
637 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
638 | return false; | |
639 | break; | |
640 | ||
641 | case R_V850_SDA_16_16_SPLIT_OFFSET: | |
642 | case R_V850_SDA_16_16_OFFSET: | |
643 | case R_V850_SDA_15_16_OFFSET: | |
644 | other = V850_OTHER_SDA; | |
645 | common = ".scommon"; | |
646 | goto small_data_common; | |
647 | ||
648 | case R_V850_ZDA_16_16_SPLIT_OFFSET: | |
649 | case R_V850_ZDA_16_16_OFFSET: | |
650 | case R_V850_ZDA_15_16_OFFSET: | |
651 | other = V850_OTHER_ZDA; | |
652 | common = ".zcommon"; | |
653 | goto small_data_common; | |
654 | ||
655 | case R_V850_TDA_4_5_OFFSET: | |
656 | case R_V850_TDA_4_4_OFFSET: | |
657 | case R_V850_TDA_6_8_OFFSET: | |
658 | case R_V850_TDA_7_8_OFFSET: | |
659 | case R_V850_TDA_7_7_OFFSET: | |
660 | case R_V850_TDA_16_16_OFFSET: | |
661 | other = V850_OTHER_TDA; | |
662 | common = ".tcommon"; | |
663 | /* fall through */ | |
664 | ||
665 | #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA) | |
666 | ||
667 | small_data_common: | |
668 | if (h) | |
669 | { | |
670 | h->other |= other; /* flag which type of relocation was used */ | |
671 | if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK) | |
672 | && (h->other & V850_OTHER_ERROR) == 0) | |
673 | { | |
674 | const char * msg; | |
675 | static char buff[200]; /* XXX */ | |
676 | ||
677 | switch (h->other & V850_OTHER_MASK) | |
678 | { | |
679 | default: | |
680 | msg = _("Variable `%s' cannot occupy in multiple small data regions"); | |
681 | break; | |
682 | case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA: | |
683 | msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions"); | |
684 | break; | |
685 | case V850_OTHER_SDA | V850_OTHER_ZDA: | |
686 | msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously"); | |
687 | break; | |
688 | case V850_OTHER_SDA | V850_OTHER_TDA: | |
689 | msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously"); | |
690 | break; | |
691 | case V850_OTHER_ZDA | V850_OTHER_TDA: | |
692 | msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously"); | |
693 | break; | |
694 | } | |
695 | ||
696 | sprintf (buff, msg, h->root.root.string); | |
697 | info->callbacks->warning (info, buff, h->root.root.string, | |
698 | abfd, h->root.u.def.section, 0); | |
699 | ||
700 | bfd_set_error (bfd_error_bad_value); | |
701 | h->other |= V850_OTHER_ERROR; | |
702 | ret = false; | |
703 | } | |
704 | } | |
705 | ||
706 | if (h && h->root.type == bfd_link_hash_common | |
707 | && h->root.u.c.p | |
708 | && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON")) | |
709 | { | |
710 | asection *section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common); | |
711 | section->flags |= SEC_IS_COMMON; | |
712 | } | |
713 | ||
714 | #ifdef DEBUG | |
715 | fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n", | |
716 | v850_elf_howto_table[ (int)r_type ].name, | |
717 | (h && h->root.root.string) ? h->root.root.string : "<unknown>", | |
718 | (h->root.type == bfd_link_hash_common) ? ", symbol is common" : ""); | |
719 | #endif | |
720 | break; | |
721 | } | |
722 | } | |
723 | ||
724 | return ret; | |
725 | } | |
726 | ||
727 | /* | |
728 | * In the old version, when an entry was checked out from the table, | |
729 | * it was deleted. This produced an error if the entry was needed | |
730 | * more than once, as the second attempted retry failed. | |
731 | * | |
732 | * In the current version, the entry is not deleted, instead we set | |
733 | * the field 'found' to true. If a second lookup matches the same | |
734 | * entry, then we know that the hi16s reloc has already been updated | |
735 | * and does not need to be updated a second time. | |
736 | * | |
737 | * TODO - TOFIX: If it is possible that we need to restore 2 different | |
738 | * addresses from the same table entry, where the first generates an | |
739 | * overflow, whilst the second do not, then this code will fail. | |
740 | */ | |
741 | ||
742 | typedef struct hi16s_location | |
743 | { | |
744 | bfd_vma addend; | |
745 | bfd_byte * address; | |
746 | unsigned long counter; | |
747 | boolean found; | |
748 | struct hi16s_location * next; | |
749 | } | |
750 | hi16s_location; | |
751 | ||
752 | static hi16s_location * previous_hi16s; | |
753 | static hi16s_location * free_hi16s; | |
754 | static unsigned long hi16s_counter; | |
755 | ||
756 | static void | |
757 | remember_hi16s_reloc (abfd, addend, address) | |
758 | bfd * abfd; | |
759 | bfd_vma addend; | |
760 | bfd_byte * address; | |
761 | { | |
762 | hi16s_location * entry = NULL; | |
763 | ||
764 | /* Find a free structure. */ | |
765 | if (free_hi16s == NULL) | |
766 | free_hi16s = (hi16s_location *) bfd_zalloc (abfd, sizeof (* free_hi16s)); | |
767 | ||
768 | entry = free_hi16s; | |
769 | free_hi16s = free_hi16s->next; | |
770 | ||
771 | entry->addend = addend; | |
772 | entry->address = address; | |
773 | entry->counter = hi16s_counter ++; | |
774 | entry->found = false; | |
775 | entry->next = previous_hi16s; | |
776 | previous_hi16s = entry; | |
777 | ||
778 | /* Cope with wrap around of our counter. */ | |
779 | if (hi16s_counter == 0) | |
780 | { | |
781 | /* XXX - Assume that all counter entries differ only in their low 16 bits. */ | |
782 | for (entry = previous_hi16s; entry != NULL; entry = entry->next) | |
783 | entry->counter &= 0xffff; | |
784 | ||
785 | hi16s_counter = 0x10000; | |
786 | } | |
787 | ||
788 | return; | |
789 | } | |
790 | ||
791 | static bfd_byte * | |
792 | find_remembered_hi16s_reloc (addend, already_found) | |
793 | bfd_vma addend; | |
794 | boolean * already_found; | |
795 | { | |
796 | hi16s_location * match = NULL; | |
797 | hi16s_location * entry; | |
798 | hi16s_location * previous = NULL; | |
799 | hi16s_location * prev; | |
800 | int i; | |
801 | bfd_byte * addr; | |
802 | ||
803 | /* Search the table. Record the most recent entry that matches. */ | |
804 | for (entry = previous_hi16s; entry; entry = entry->next) | |
805 | { | |
806 | if (entry->addend == addend | |
807 | && (match == NULL || match->counter < entry->counter)) | |
808 | { | |
809 | previous = prev; | |
810 | match = entry; | |
811 | } | |
812 | ||
813 | prev = entry; | |
814 | } | |
815 | ||
816 | if (match == NULL) | |
817 | return NULL; | |
818 | ||
819 | /* Extract the address. */ | |
820 | addr = match->address; | |
821 | ||
822 | /* Remeber if this entry has already been used before. */ | |
823 | if (already_found) | |
824 | * already_found = match->found; | |
825 | ||
826 | /* Note that this entry has now been used. */ | |
827 | match->found = true; | |
828 | ||
829 | return addr; | |
830 | } | |
831 | ||
832 | /* FIXME: The code here probably ought to be removed and the code in reloc.c | |
833 | allowed to do its stuff instead. At least for most of the relocs, anwyay. */ | |
834 | static bfd_reloc_status_type | |
835 | v850_elf_perform_relocation (abfd, r_type, addend, address) | |
836 | bfd * abfd; | |
837 | int r_type; | |
838 | bfd_vma addend; | |
839 | bfd_byte * address; | |
840 | { | |
841 | unsigned long insn; | |
842 | bfd_signed_vma saddend = (bfd_signed_vma) addend; | |
843 | ||
844 | switch (r_type) | |
845 | { | |
846 | default: | |
847 | /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */ | |
848 | return bfd_reloc_notsupported; | |
849 | ||
850 | case R_V850_32: | |
851 | bfd_put_32 (abfd, addend, address); | |
852 | return bfd_reloc_ok; | |
853 | ||
854 | case R_V850_22_PCREL: | |
855 | if (saddend > 0x1fffff || saddend < -0x200000) | |
856 | return bfd_reloc_overflow; | |
857 | ||
858 | if ((addend % 2) != 0) | |
859 | return bfd_reloc_dangerous; | |
860 | ||
861 | insn = bfd_get_32 (abfd, address); | |
862 | insn &= ~0xfffe003f; | |
863 | insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16)); | |
864 | bfd_put_32 (abfd, insn, address); | |
865 | return bfd_reloc_ok; | |
866 | ||
867 | case R_V850_9_PCREL: | |
868 | if (saddend > 0xff || saddend < -0x100) | |
869 | return bfd_reloc_overflow; | |
870 | ||
871 | if ((addend % 2) != 0) | |
872 | return bfd_reloc_dangerous; | |
873 | ||
874 | insn = bfd_get_16 (abfd, address); | |
875 | insn &= ~ 0xf870; | |
876 | insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3); | |
877 | break; | |
878 | ||
879 | case R_V850_HI16: | |
880 | addend += (bfd_get_16 (abfd, address) << 16); | |
881 | addend = (addend >> 16); | |
882 | insn = addend; | |
883 | break; | |
884 | ||
885 | case R_V850_HI16_S: | |
886 | /* Remember where this relocation took place. */ | |
887 | remember_hi16s_reloc (abfd, addend, address); | |
888 | ||
889 | addend += (bfd_get_16 (abfd, address) << 16); | |
890 | addend = (addend >> 16) + ((addend & 0x8000) != 0); | |
891 | ||
892 | /* This relocation cannot overflow. */ | |
893 | if (addend > 0x7fff) | |
894 | addend = 0; | |
895 | ||
896 | insn = addend; | |
897 | break; | |
898 | ||
899 | case R_V850_LO16: | |
900 | /* Calculate the sum of the value stored in the instruction and the | |
901 | addend and check for overflow from the low 16 bits into the high | |
902 | 16 bits. The assembler has already done some of this: If the | |
903 | value stored in the instruction has its 15th bit set, (counting | |
904 | from zero) then the assembler will have added 1 to the value | |
905 | stored in the associated HI16S reloc. So for example, these | |
906 | relocations: | |
907 | ||
908 | movhi hi( fred ), r0, r1 | |
909 | movea lo( fred ), r1, r1 | |
910 | ||
911 | will store 0 in the value fields for the MOVHI and MOVEA instructions | |
912 | and addend will be the address of fred, but for these instructions: | |
913 | ||
914 | movhi hi( fred + 0x123456), r0, r1 | |
915 | movea lo( fred + 0x123456), r1, r1 | |
916 | ||
917 | the value stored in the MOVHI instruction will be 0x12 and the value | |
918 | stored in the MOVEA instruction will be 0x3456. If however the | |
919 | instructions were: | |
920 | ||
921 | movhi hi( fred + 0x10ffff), r0, r1 | |
922 | movea lo( fred + 0x10ffff), r1, r1 | |
923 | ||
924 | then the value stored in the MOVHI instruction would be 0x11 (not | |
925 | 0x10) and the value stored in the MOVEA instruction would be 0xffff. | |
926 | Thus (assuming for the moment that the addend is 0), at run time the | |
927 | MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction | |
928 | adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if | |
929 | the instructions were: | |
930 | ||
931 | movhi hi( fred - 1), r0, r1 | |
932 | movea lo( fred - 1), r1, r1 | |
933 | ||
934 | then 0 is stored in the MOVHI instruction and -1 is stored in the | |
935 | MOVEA instruction. | |
936 | ||
937 | Overflow can occur if the addition of the value stored in the | |
938 | instruction plus the addend sets the 15th bit when before it was clear. | |
939 | This is because the 15th bit will be sign extended into the high part, | |
940 | thus reducing its value by one, but since the 15th bit was originally | |
941 | clear, the assembler will not have added 1 to the previous HI16S reloc | |
942 | to compensate for this effect. For example: | |
943 | ||
944 | movhi hi( fred + 0x123456), r0, r1 | |
945 | movea lo( fred + 0x123456), r1, r1 | |
946 | ||
947 | The value stored in HI16S reloc is 0x12, the value stored in the LO16 | |
948 | reloc is 0x3456. If we assume that the address of fred is 0x00007000 | |
949 | then the relocations become: | |
950 | ||
951 | HI16S: 0x0012 + (0x00007000 >> 16) = 0x12 | |
952 | LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456 | |
953 | ||
954 | but when the instructions are executed, the MOVEA instruction's value | |
955 | is signed extended, so the sum becomes: | |
956 | ||
957 | 0x00120000 | |
958 | + 0xffffa456 | |
959 | ------------ | |
960 | 0x0011a456 but 'fred + 0x123456' = 0x0012a456 | |
961 | ||
962 | Note that if the 15th bit was set in the value stored in the LO16 | |
963 | reloc, then we do not have to do anything: | |
964 | ||
965 | movhi hi( fred + 0x10ffff), r0, r1 | |
966 | movea lo( fred + 0x10ffff), r1, r1 | |
967 | ||
968 | HI16S: 0x0011 + (0x00007000 >> 16) = 0x11 | |
969 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff | |
970 | ||
971 | 0x00110000 | |
972 | + 0x00006fff | |
973 | ------------ | |
974 | 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff | |
975 | ||
976 | ||
977 | Overflow can also occur if the computation carries into the 16th bit | |
978 | and it also results in the 15th bit having the same value as the 15th | |
979 | bit of the original value. What happens is that the HI16S reloc | |
980 | will have already examined the 15th bit of the original value and | |
981 | added 1 to the high part if the bit is set. This compensates for the | |
982 | sign extension of 15th bit of the result of the computation. But now | |
983 | there is a carry into the 16th bit, and this has not been allowed for. | |
984 | ||
985 | So, for example if fred is at address 0xf000: | |
986 | ||
987 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] | |
988 | movea lo( fred + 0xffff), r1, r1 | |
989 | ||
990 | HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001 | |
991 | LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost) | |
992 | ||
993 | 0x00010000 | |
994 | + 0xffffefff | |
995 | ------------ | |
996 | 0x0000efff but 'fred + 0xffff' = 0x0001efff | |
997 | ||
998 | Similarly, if the 15th bit remains clear, but overflow occurs into | |
999 | the 16th bit then (assuming the address of fred is 0xf000): | |
1000 | ||
1001 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] | |
1002 | movea lo( fred + 0x7000), r1, r1 | |
1003 | ||
1004 | HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000 | |
1005 | LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost) | |
1006 | ||
1007 | 0x00000000 | |
1008 | + 0x00006fff | |
1009 | ------------ | |
1010 | 0x00006fff but 'fred + 0x7000' = 0x00016fff | |
1011 | ||
1012 | Note - there is no need to change anything if a carry occurs, and the | |
1013 | 15th bit changes its value from being set to being clear, as the HI16S | |
1014 | reloc will have already added in 1 to the high part for us: | |
1015 | ||
1016 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] | |
1017 | movea lo( fred + 0xffff), r1, r1 | |
1018 | ||
1019 | HI16S: 0x0001 + (0x00007000 >> 16) | |
1020 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost) | |
1021 | ||
1022 | 0x00010000 | |
1023 | + 0x00006fff (bit 15 not set, so the top half is zero) | |
1024 | ------------ | |
1025 | 0x00016fff which is right (assuming that fred is at 0x7000) | |
1026 | ||
1027 | but if the 15th bit goes from being clear to being set, then we must | |
1028 | once again handle overflow: | |
1029 | ||
1030 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] | |
1031 | movea lo( fred + 0x7000), r1, r1 | |
1032 | ||
1033 | HI16S: 0x0000 + (0x0000ffff >> 16) | |
1034 | LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16) | |
1035 | ||
1036 | 0x00000000 | |
1037 | + 0x00006fff (bit 15 not set, so the top half is zero) | |
1038 | ------------ | |
1039 | 0x00006fff which is wrong (assuming that fred is at 0xffff) | |
1040 | */ | |
1041 | ||
1042 | { | |
1043 | long result; | |
1044 | ||
1045 | insn = bfd_get_16 (abfd, address); | |
1046 | result = insn + addend; | |
1047 | ||
1048 | #define BIT15_SET(x) ((x) & 0x8000) | |
1049 | #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff) | |
1050 | ||
1051 | if ((BIT15_SET (result) && ! BIT15_SET (addend)) | |
1052 | || (OVERFLOWS (addend, insn) | |
1053 | && ((! BIT15_SET (insn)) || (BIT15_SET (addend))))) | |
1054 | { | |
1055 | boolean already_updated; | |
1056 | bfd_byte * hi16s_address = find_remembered_hi16s_reloc | |
1057 | (addend, & already_updated); | |
1058 | ||
1059 | /* Amend the matching HI16_S relocation. */ | |
1060 | if (hi16s_address != NULL) | |
1061 | { | |
1062 | if (! already_updated) | |
1063 | { | |
1064 | insn = bfd_get_16 (abfd, hi16s_address); | |
1065 | insn += 1; | |
1066 | bfd_put_16 (abfd, insn, hi16s_address); | |
1067 | } | |
1068 | } | |
1069 | else | |
1070 | { | |
1071 | fprintf (stderr, _("FAILED to find previous HI16 reloc\n")); | |
1072 | return bfd_reloc_overflow; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | /* Do not complain if value has top bit set, as this has been anticipated. */ | |
1077 | insn = result & 0xffff; | |
1078 | break; | |
1079 | } | |
1080 | ||
1081 | case R_V850_8: | |
1082 | addend += (char) bfd_get_8 (abfd, address); | |
1083 | ||
1084 | saddend = (bfd_signed_vma) addend; | |
1085 | ||
1086 | if (saddend > 0x7f || saddend < -0x80) | |
1087 | return bfd_reloc_overflow; | |
1088 | ||
1089 | bfd_put_8 (abfd, addend, address); | |
1090 | return bfd_reloc_ok; | |
1091 | ||
1092 | case R_V850_CALLT_16_16_OFFSET: | |
1093 | addend += bfd_get_16 (abfd, address); | |
1094 | ||
1095 | saddend = (bfd_signed_vma) addend; | |
1096 | ||
1097 | if (saddend > 0xffff || saddend < 0) | |
1098 | return bfd_reloc_overflow; | |
1099 | ||
1100 | insn = addend; | |
1101 | break; | |
1102 | ||
1103 | case R_V850_16: | |
1104 | ||
1105 | /* drop through */ | |
1106 | case R_V850_SDA_16_16_OFFSET: | |
1107 | case R_V850_ZDA_16_16_OFFSET: | |
1108 | case R_V850_TDA_16_16_OFFSET: | |
1109 | addend += bfd_get_16 (abfd, address); | |
1110 | ||
1111 | saddend = (bfd_signed_vma) addend; | |
1112 | ||
1113 | if (saddend > 0x7fff || saddend < -0x8000) | |
1114 | return bfd_reloc_overflow; | |
1115 | ||
1116 | insn = addend; | |
1117 | break; | |
1118 | ||
1119 | case R_V850_SDA_15_16_OFFSET: | |
1120 | case R_V850_ZDA_15_16_OFFSET: | |
1121 | insn = bfd_get_16 (abfd, address); | |
1122 | addend += (insn & 0xfffe); | |
1123 | ||
1124 | saddend = (bfd_signed_vma) addend; | |
1125 | ||
1126 | if (saddend > 0x7ffe || saddend < -0x8000) | |
1127 | return bfd_reloc_overflow; | |
1128 | ||
1129 | if (addend & 1) | |
1130 | return bfd_reloc_dangerous; | |
1131 | ||
1132 | insn = (addend & ~1) | (insn & 1); | |
1133 | break; | |
1134 | ||
1135 | case R_V850_TDA_6_8_OFFSET: | |
1136 | insn = bfd_get_16 (abfd, address); | |
1137 | addend += ((insn & 0x7e) << 1); | |
1138 | ||
1139 | saddend = (bfd_signed_vma) addend; | |
1140 | ||
1141 | if (saddend > 0xfc || saddend < 0) | |
1142 | return bfd_reloc_overflow; | |
1143 | ||
1144 | if (addend & 3) | |
1145 | return bfd_reloc_dangerous; | |
1146 | ||
1147 | insn &= 0xff81; | |
1148 | insn |= (addend >> 1); | |
1149 | break; | |
1150 | ||
1151 | case R_V850_TDA_7_8_OFFSET: | |
1152 | insn = bfd_get_16 (abfd, address); | |
1153 | addend += ((insn & 0x7f) << 1); | |
1154 | ||
1155 | saddend = (bfd_signed_vma) addend; | |
1156 | ||
1157 | if (saddend > 0xfe || saddend < 0) | |
1158 | return bfd_reloc_overflow; | |
1159 | ||
1160 | if (addend & 1) | |
1161 | return bfd_reloc_dangerous; | |
1162 | ||
1163 | insn &= 0xff80; | |
1164 | insn |= (addend >> 1); | |
1165 | break; | |
1166 | ||
1167 | case R_V850_TDA_7_7_OFFSET: | |
1168 | insn = bfd_get_16 (abfd, address); | |
1169 | addend += insn & 0x7f; | |
1170 | ||
1171 | saddend = (bfd_signed_vma) addend; | |
1172 | ||
1173 | if (saddend > 0x7f || saddend < 0) | |
1174 | return bfd_reloc_overflow; | |
1175 | ||
1176 | insn &= 0xff80; | |
1177 | insn |= addend; | |
1178 | break; | |
1179 | ||
1180 | case R_V850_TDA_4_5_OFFSET: | |
1181 | insn = bfd_get_16 (abfd, address); | |
1182 | addend += ((insn & 0xf) << 1); | |
1183 | ||
1184 | saddend = (bfd_signed_vma) addend; | |
1185 | ||
1186 | if (saddend > 0x1e || saddend < 0) | |
1187 | return bfd_reloc_overflow; | |
1188 | ||
1189 | if (addend & 1) | |
1190 | return bfd_reloc_dangerous; | |
1191 | ||
1192 | insn &= 0xfff0; | |
1193 | insn |= (addend >> 1); | |
1194 | break; | |
1195 | ||
1196 | case R_V850_TDA_4_4_OFFSET: | |
1197 | insn = bfd_get_16 (abfd, address); | |
1198 | addend += insn & 0xf; | |
1199 | ||
1200 | saddend = (bfd_signed_vma) addend; | |
1201 | ||
1202 | if (saddend > 0xf || saddend < 0) | |
1203 | return bfd_reloc_overflow; | |
1204 | ||
1205 | insn &= 0xfff0; | |
1206 | insn |= addend; | |
1207 | break; | |
1208 | ||
1209 | case R_V850_ZDA_16_16_SPLIT_OFFSET: | |
1210 | case R_V850_SDA_16_16_SPLIT_OFFSET: | |
1211 | insn = bfd_get_32 (abfd, address); | |
1212 | addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5); | |
1213 | ||
1214 | saddend = (bfd_signed_vma) addend; | |
1215 | ||
1216 | if (saddend > 0x7fff || saddend < -0x8000) | |
1217 | return bfd_reloc_overflow; | |
1218 | ||
1219 | insn &= 0x0001ffdf; | |
1220 | insn |= (addend & 1) << 5; | |
1221 | insn |= (addend & ~1) << 16; | |
1222 | ||
1223 | bfd_put_32 (abfd, insn, address); | |
1224 | return bfd_reloc_ok; | |
1225 | ||
1226 | case R_V850_CALLT_6_7_OFFSET: | |
1227 | insn = bfd_get_16 (abfd, address); | |
1228 | addend += ((insn & 0x3f) << 1); | |
1229 | ||
1230 | saddend = (bfd_signed_vma) addend; | |
1231 | ||
1232 | if (saddend > 0x7e || saddend < 0) | |
1233 | return bfd_reloc_overflow; | |
1234 | ||
1235 | if (addend & 1) | |
1236 | return bfd_reloc_dangerous; | |
1237 | ||
1238 | insn &= 0xff80; | |
1239 | insn |= (addend >> 1); | |
1240 | break; | |
1241 | ||
1242 | case R_V850_GNU_VTINHERIT: | |
1243 | case R_V850_GNU_VTENTRY: | |
1244 | return bfd_reloc_ok; | |
1245 | ||
1246 | } | |
1247 | ||
1248 | bfd_put_16 (abfd, insn, address); | |
1249 | return bfd_reloc_ok; | |
1250 | } | |
1251 | ||
1252 | \f | |
1253 | /* Insert the addend into the instruction. */ | |
1254 | static bfd_reloc_status_type | |
1255 | v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err) | |
1256 | bfd * abfd; | |
1257 | arelent * reloc; | |
1258 | asymbol * symbol; | |
1259 | PTR data; | |
1260 | asection * isection; | |
1261 | bfd * obfd; | |
1262 | char ** err; | |
1263 | { | |
1264 | long relocation; | |
1265 | ||
1266 | /* If there is an output BFD, | |
1267 | and the symbol is not a section name (which is only defined at final link time), | |
1268 | and either we are not putting the addend into the instruction | |
1269 | or the addend is zero, so there is nothing to add into the instruction | |
1270 | then just fixup the address and return. */ | |
1271 | if (obfd != (bfd *) NULL | |
1272 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1273 | && (! reloc->howto->partial_inplace | |
1274 | || reloc->addend == 0)) | |
1275 | { | |
1276 | reloc->address += isection->output_offset; | |
1277 | return bfd_reloc_ok; | |
1278 | } | |
1279 | #if 0 | |
1280 | else if (obfd != NULL) | |
1281 | { | |
1282 | return bfd_reloc_continue; | |
1283 | } | |
1284 | #endif | |
1285 | ||
1286 | /* Catch relocs involving undefined symbols. */ | |
1287 | if (bfd_is_und_section (symbol->section) | |
1288 | && (symbol->flags & BSF_WEAK) == 0 | |
1289 | && obfd == NULL) | |
1290 | return bfd_reloc_undefined; | |
1291 | ||
1292 | /* We handle final linking of some relocs ourselves. */ | |
1293 | ||
1294 | /* Is the address of the relocation really within the section? */ | |
1295 | if (reloc->address > isection->_cooked_size) | |
1296 | return bfd_reloc_outofrange; | |
1297 | ||
1298 | /* Work out which section the relocation is targetted at and the | |
1299 | initial relocation command value. */ | |
1300 | ||
1301 | /* Get symbol value. (Common symbols are special.) */ | |
1302 | if (bfd_is_com_section (symbol->section)) | |
1303 | relocation = 0; | |
1304 | else | |
1305 | relocation = symbol->value; | |
1306 | ||
1307 | /* Convert input-section-relative symbol value to absolute + addend. */ | |
1308 | relocation += symbol->section->output_section->vma; | |
1309 | relocation += symbol->section->output_offset; | |
1310 | relocation += reloc->addend; | |
1311 | ||
1312 | if (reloc->howto->pc_relative == true) | |
1313 | { | |
1314 | /* Here the variable relocation holds the final address of the | |
1315 | symbol we are relocating against, plus any addend. */ | |
1316 | relocation -= isection->output_section->vma + isection->output_offset; | |
1317 | ||
1318 | /* Deal with pcrel_offset */ | |
1319 | relocation -= reloc->address; | |
1320 | } | |
1321 | ||
1322 | reloc->addend = relocation; | |
1323 | return bfd_reloc_ok; | |
1324 | } | |
1325 | ||
1326 | \f | |
1327 | /*ARGSUSED*/ | |
1328 | static boolean | |
1329 | v850_elf_is_local_label_name (abfd, name) | |
1330 | bfd * abfd; | |
1331 | const char * name; | |
1332 | { | |
1333 | return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.')) | |
1334 | || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')); | |
1335 | } | |
1336 | ||
1337 | \f | |
1338 | /* Perform a relocation as part of a final link. */ | |
1339 | static bfd_reloc_status_type | |
1340 | v850_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
1341 | input_section, contents, offset, value, | |
1342 | addend, info, sym_sec, is_local) | |
1343 | reloc_howto_type * howto; | |
1344 | bfd * input_bfd; | |
1345 | bfd * output_bfd; | |
1346 | asection * input_section; | |
1347 | bfd_byte * contents; | |
1348 | bfd_vma offset; | |
1349 | bfd_vma value; | |
1350 | bfd_vma addend; | |
1351 | struct bfd_link_info * info; | |
1352 | asection * sym_sec; | |
1353 | int is_local; | |
1354 | { | |
1355 | unsigned long r_type = howto->type; | |
1356 | bfd_byte * hit_data = contents + offset; | |
1357 | ||
1358 | /* Adjust the value according to the relocation. */ | |
1359 | switch (r_type) | |
1360 | { | |
1361 | case R_V850_9_PCREL: | |
1362 | value -= (input_section->output_section->vma | |
1363 | + input_section->output_offset); | |
1364 | value -= offset; | |
1365 | break; | |
1366 | ||
1367 | case R_V850_22_PCREL: | |
1368 | value -= (input_section->output_section->vma | |
1369 | + input_section->output_offset | |
1370 | + offset); | |
1371 | ||
1372 | value = SEXT24 (value); /* Only the bottom 24 bits of the PC are valid */ | |
1373 | break; | |
1374 | ||
1375 | case R_V850_HI16_S: | |
1376 | case R_V850_HI16: | |
1377 | case R_V850_LO16: | |
1378 | case R_V850_16: | |
1379 | case R_V850_32: | |
1380 | case R_V850_8: | |
1381 | break; | |
1382 | ||
1383 | case R_V850_ZDA_15_16_OFFSET: | |
1384 | case R_V850_ZDA_16_16_OFFSET: | |
1385 | case R_V850_ZDA_16_16_SPLIT_OFFSET: | |
1386 | if (sym_sec == NULL) | |
1387 | return bfd_reloc_undefined; | |
1388 | ||
1389 | value -= sym_sec->output_section->vma; | |
1390 | break; | |
1391 | ||
1392 | case R_V850_SDA_15_16_OFFSET: | |
1393 | case R_V850_SDA_16_16_OFFSET: | |
1394 | case R_V850_SDA_16_16_SPLIT_OFFSET: | |
1395 | { | |
1396 | unsigned long gp; | |
1397 | struct bfd_link_hash_entry * h; | |
1398 | ||
1399 | if (sym_sec == NULL) | |
1400 | return bfd_reloc_undefined; | |
1401 | ||
1402 | /* Get the value of __gp. */ | |
1403 | h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true); | |
1404 | if (h == (struct bfd_link_hash_entry *) NULL | |
1405 | || h->type != bfd_link_hash_defined) | |
1406 | return bfd_reloc_other; | |
1407 | ||
1408 | gp = (h->u.def.value | |
1409 | + h->u.def.section->output_section->vma | |
1410 | + h->u.def.section->output_offset); | |
1411 | ||
1412 | value -= sym_sec->output_section->vma; | |
1413 | value -= (gp - sym_sec->output_section->vma); | |
1414 | } | |
1415 | break; | |
1416 | ||
1417 | case R_V850_TDA_4_4_OFFSET: | |
1418 | case R_V850_TDA_4_5_OFFSET: | |
1419 | case R_V850_TDA_16_16_OFFSET: | |
1420 | case R_V850_TDA_7_7_OFFSET: | |
1421 | case R_V850_TDA_7_8_OFFSET: | |
1422 | case R_V850_TDA_6_8_OFFSET: | |
1423 | { | |
1424 | unsigned long ep; | |
1425 | struct bfd_link_hash_entry * h; | |
1426 | ||
1427 | /* Get the value of __ep. */ | |
1428 | h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true); | |
1429 | if (h == (struct bfd_link_hash_entry *) NULL | |
1430 | || h->type != bfd_link_hash_defined) | |
1431 | return bfd_reloc_continue; /* Actually this indicates that __ep could not be found. */ | |
1432 | ||
1433 | ep = (h->u.def.value | |
1434 | + h->u.def.section->output_section->vma | |
1435 | + h->u.def.section->output_offset); | |
1436 | ||
1437 | value -= ep; | |
1438 | } | |
1439 | break; | |
1440 | ||
1441 | case R_V850_CALLT_6_7_OFFSET: | |
1442 | { | |
1443 | unsigned long ctbp; | |
1444 | struct bfd_link_hash_entry * h; | |
1445 | ||
1446 | /* Get the value of __ctbp. */ | |
1447 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); | |
1448 | if (h == (struct bfd_link_hash_entry *) NULL | |
1449 | || h->type != bfd_link_hash_defined) | |
1450 | return (bfd_reloc_dangerous + 1); /* Actually this indicates that __ctbp could not be found. */ | |
1451 | ||
1452 | ctbp = (h->u.def.value | |
1453 | + h->u.def.section->output_section->vma | |
1454 | + h->u.def.section->output_offset); | |
1455 | value -= ctbp; | |
1456 | } | |
1457 | break; | |
1458 | ||
1459 | case R_V850_CALLT_16_16_OFFSET: | |
1460 | { | |
1461 | unsigned long ctbp; | |
1462 | struct bfd_link_hash_entry * h; | |
1463 | ||
1464 | if (sym_sec == NULL) | |
1465 | return bfd_reloc_undefined; | |
1466 | ||
1467 | /* Get the value of __ctbp. */ | |
1468 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); | |
1469 | if (h == (struct bfd_link_hash_entry *) NULL | |
1470 | || h->type != bfd_link_hash_defined) | |
1471 | return (bfd_reloc_dangerous + 1); | |
1472 | ||
1473 | ctbp = (h->u.def.value | |
1474 | + h->u.def.section->output_section->vma | |
1475 | + h->u.def.section->output_offset); | |
1476 | ||
1477 | value -= sym_sec->output_section->vma; | |
1478 | value -= (ctbp - sym_sec->output_section->vma); | |
1479 | } | |
1480 | break; | |
1481 | ||
1482 | case R_V850_NONE: | |
1483 | case R_V850_GNU_VTINHERIT: | |
1484 | case R_V850_GNU_VTENTRY: | |
1485 | return bfd_reloc_ok; | |
1486 | ||
1487 | default: | |
1488 | return bfd_reloc_notsupported; | |
1489 | } | |
1490 | ||
1491 | /* Perform the relocation. */ | |
1492 | return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data); | |
1493 | } | |
1494 | ||
1495 | \f | |
1496 | /* Relocate an V850 ELF section. */ | |
1497 | static boolean | |
1498 | v850_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
1499 | contents, relocs, local_syms, local_sections) | |
1500 | bfd * output_bfd; | |
1501 | struct bfd_link_info * info; | |
1502 | bfd * input_bfd; | |
1503 | asection * input_section; | |
1504 | bfd_byte * contents; | |
1505 | Elf_Internal_Rela * relocs; | |
1506 | Elf_Internal_Sym * local_syms; | |
1507 | asection ** local_sections; | |
1508 | { | |
1509 | Elf_Internal_Shdr * symtab_hdr; | |
1510 | struct elf_link_hash_entry ** sym_hashes; | |
1511 | Elf_Internal_Rela * rel; | |
1512 | Elf_Internal_Rela * relend; | |
1513 | ||
1514 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1515 | sym_hashes = elf_sym_hashes (input_bfd); | |
1516 | ||
1517 | if (sym_hashes == NULL) | |
1518 | { | |
1519 | info->callbacks->warning | |
1520 | (info, "no hash table available", NULL, input_bfd, input_section, 0); | |
1521 | ||
1522 | return false; | |
1523 | } | |
1524 | ||
1525 | /* Reset the list of remembered HI16S relocs to empty. */ | |
1526 | free_hi16s = previous_hi16s; | |
1527 | previous_hi16s = NULL; | |
1528 | hi16s_counter = 0; | |
1529 | ||
1530 | rel = relocs; | |
1531 | relend = relocs + input_section->reloc_count; | |
1532 | for (; rel < relend; rel++) | |
1533 | { | |
1534 | int r_type; | |
1535 | reloc_howto_type * howto; | |
1536 | unsigned long r_symndx; | |
1537 | Elf_Internal_Sym * sym; | |
1538 | asection * sec; | |
1539 | struct elf_link_hash_entry * h; | |
1540 | bfd_vma relocation; | |
1541 | bfd_reloc_status_type r; | |
1542 | ||
1543 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1544 | r_type = ELF32_R_TYPE (rel->r_info); | |
1545 | ||
1546 | if (r_type == R_V850_GNU_VTENTRY | |
1547 | || r_type == R_V850_GNU_VTINHERIT) | |
1548 | continue; | |
1549 | ||
1550 | howto = v850_elf_howto_table + r_type; | |
1551 | ||
1552 | if (info->relocateable) | |
1553 | { | |
1554 | /* This is a relocateable link. We don't have to change | |
1555 | anything, unless the reloc is against a section symbol, | |
1556 | in which case we have to adjust according to where the | |
1557 | section symbol winds up in the output section. */ | |
1558 | if (r_symndx < symtab_hdr->sh_info) | |
1559 | { | |
1560 | sym = local_syms + r_symndx; | |
1561 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1562 | { | |
1563 | sec = local_sections[r_symndx]; | |
1564 | rel->r_addend += sec->output_offset + sym->st_value; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | continue; | |
1569 | } | |
1570 | ||
1571 | /* This is a final link. */ | |
1572 | h = NULL; | |
1573 | sym = NULL; | |
1574 | sec = NULL; | |
1575 | if (r_symndx < symtab_hdr->sh_info) | |
1576 | { | |
1577 | sym = local_syms + r_symndx; | |
1578 | sec = local_sections[r_symndx]; | |
1579 | relocation = (sec->output_section->vma | |
1580 | + sec->output_offset | |
1581 | + sym->st_value); | |
1582 | #if 0 | |
1583 | { | |
1584 | char * name; | |
1585 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
1586 | name = (name == NULL) ? "<none>" : name; | |
1587 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", | |
1588 | sec->name, name, sym->st_name, | |
1589 | sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend); | |
1590 | } | |
1591 | #endif | |
1592 | } | |
1593 | else | |
1594 | { | |
1595 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1596 | ||
1597 | while (h->root.type == bfd_link_hash_indirect | |
1598 | || h->root.type == bfd_link_hash_warning) | |
1599 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1600 | ||
1601 | if (h->root.type == bfd_link_hash_defined | |
1602 | || h->root.type == bfd_link_hash_defweak) | |
1603 | { | |
1604 | sec = h->root.u.def.section; | |
1605 | relocation = (h->root.u.def.value | |
1606 | + sec->output_section->vma | |
1607 | + sec->output_offset); | |
1608 | #if 0 | |
1609 | fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", | |
1610 | sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation); | |
1611 | #endif | |
1612 | } | |
1613 | else if (h->root.type == bfd_link_hash_undefweak) | |
1614 | { | |
1615 | #if 0 | |
1616 | fprintf (stderr, "undefined: sec: %s, name: %s\n", | |
1617 | sec->name, h->root.root.string); | |
1618 | #endif | |
1619 | relocation = 0; | |
1620 | } | |
1621 | else | |
1622 | { | |
1623 | if (! ((*info->callbacks->undefined_symbol) | |
1624 | (info, h->root.root.string, input_bfd, | |
1625 | input_section, rel->r_offset))) | |
1626 | return false; | |
1627 | #if 0 | |
1628 | fprintf (stderr, "unknown: name: %s\n", h->root.root.string); | |
1629 | #endif | |
1630 | relocation = 0; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | /* FIXME: We should use the addend, but the COFF relocations | |
1635 | don't. */ | |
1636 | r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
1637 | input_section, | |
1638 | contents, rel->r_offset, | |
1639 | relocation, rel->r_addend, | |
1640 | info, sec, h == NULL); | |
1641 | ||
1642 | if (r != bfd_reloc_ok) | |
1643 | { | |
1644 | const char * name; | |
1645 | const char * msg = (const char *)0; | |
1646 | ||
1647 | if (h != NULL) | |
1648 | name = h->root.root.string; | |
1649 | else | |
1650 | { | |
1651 | name = (bfd_elf_string_from_elf_section | |
1652 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1653 | if (name == NULL || *name == '\0') | |
1654 | name = bfd_section_name (input_bfd, sec); | |
1655 | } | |
1656 | ||
1657 | switch (r) | |
1658 | { | |
1659 | case bfd_reloc_overflow: | |
1660 | if (! ((*info->callbacks->reloc_overflow) | |
1661 | (info, name, howto->name, (bfd_vma) 0, | |
1662 | input_bfd, input_section, rel->r_offset))) | |
1663 | return false; | |
1664 | break; | |
1665 | ||
1666 | case bfd_reloc_undefined: | |
1667 | if (! ((*info->callbacks->undefined_symbol) | |
1668 | (info, name, input_bfd, input_section, | |
1669 | rel->r_offset))) | |
1670 | return false; | |
1671 | break; | |
1672 | ||
1673 | case bfd_reloc_outofrange: | |
1674 | msg = _("internal error: out of range error"); | |
1675 | goto common_error; | |
1676 | ||
1677 | case bfd_reloc_notsupported: | |
1678 | msg = _("internal error: unsupported relocation error"); | |
1679 | goto common_error; | |
1680 | ||
1681 | case bfd_reloc_dangerous: | |
1682 | msg = _("internal error: dangerous relocation"); | |
1683 | goto common_error; | |
1684 | ||
1685 | case bfd_reloc_other: | |
1686 | msg = _("could not locate special linker symbol __gp"); | |
1687 | goto common_error; | |
1688 | ||
1689 | case bfd_reloc_continue: | |
1690 | msg = _("could not locate special linker symbol __ep"); | |
1691 | goto common_error; | |
1692 | ||
1693 | case (bfd_reloc_dangerous + 1): | |
1694 | msg = _("could not locate special linker symbol __ctbp"); | |
1695 | goto common_error; | |
1696 | ||
1697 | default: | |
1698 | msg = _("internal error: unknown error"); | |
1699 | /* fall through */ | |
1700 | ||
1701 | common_error: | |
1702 | if (!((*info->callbacks->warning) | |
1703 | (info, msg, name, input_bfd, input_section, | |
1704 | rel->r_offset))) | |
1705 | return false; | |
1706 | break; | |
1707 | } | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | return true; | |
1712 | } | |
1713 | ||
1714 | static boolean | |
1715 | v850_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
1716 | bfd *abfd; | |
1717 | struct bfd_link_info *info; | |
1718 | asection *sec; | |
1719 | const Elf_Internal_Rela *relocs; | |
1720 | { | |
1721 | /* No got and plt entries for v850-elf */ | |
1722 | return true; | |
1723 | } | |
1724 | ||
1725 | static asection * | |
1726 | v850_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
1727 | bfd *abfd; | |
1728 | struct bfd_link_info *info; | |
1729 | Elf_Internal_Rela *rel; | |
1730 | struct elf_link_hash_entry *h; | |
1731 | Elf_Internal_Sym *sym; | |
1732 | { | |
1733 | if (h != NULL) | |
1734 | { | |
1735 | switch (ELF32_R_TYPE (rel->r_info)) | |
1736 | { | |
1737 | case R_V850_GNU_VTINHERIT: | |
1738 | case R_V850_GNU_VTENTRY: | |
1739 | break; | |
1740 | ||
1741 | default: | |
1742 | switch (h->root.type) | |
1743 | { | |
1744 | case bfd_link_hash_defined: | |
1745 | case bfd_link_hash_defweak: | |
1746 | return h->root.u.def.section; | |
1747 | ||
1748 | case bfd_link_hash_common: | |
1749 | return h->root.u.c.p->section; | |
1750 | } | |
1751 | } | |
1752 | } | |
1753 | else | |
1754 | { | |
1755 | if (!(elf_bad_symtab (abfd) | |
1756 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
1757 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
1758 | && sym->st_shndx != SHN_COMMON)) | |
1759 | { | |
1760 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
1761 | } | |
1762 | } | |
1763 | return NULL; | |
1764 | } | |
1765 | /* Set the right machine number. */ | |
1766 | static boolean | |
1767 | v850_elf_object_p (abfd) | |
1768 | bfd *abfd; | |
1769 | { | |
1770 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) | |
1771 | { | |
1772 | default: | |
1773 | case E_V850_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, 0); break; | |
1774 | case E_V850E_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e); break; | |
1775 | case E_V850EA_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850ea); break; | |
1776 | } | |
1777 | return true; | |
1778 | } | |
1779 | ||
1780 | /* Store the machine number in the flags field. */ | |
1781 | static void | |
1782 | v850_elf_final_write_processing (abfd, linker) | |
1783 | bfd * abfd; | |
1784 | boolean linker; | |
1785 | { | |
1786 | unsigned long val; | |
1787 | ||
1788 | switch (bfd_get_mach (abfd)) | |
1789 | { | |
1790 | default: | |
1791 | case 0: val = E_V850_ARCH; break; | |
1792 | case bfd_mach_v850e: val = E_V850E_ARCH; break; | |
1793 | case bfd_mach_v850ea: val = E_V850EA_ARCH; break; | |
1794 | } | |
1795 | ||
1796 | elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH; | |
1797 | elf_elfheader (abfd)->e_flags |= val; | |
1798 | } | |
1799 | ||
1800 | /* Function to keep V850 specific file flags. */ | |
1801 | static boolean | |
1802 | v850_elf_set_private_flags (abfd, flags) | |
1803 | bfd * abfd; | |
1804 | flagword flags; | |
1805 | { | |
1806 | BFD_ASSERT (!elf_flags_init (abfd) | |
1807 | || elf_elfheader (abfd)->e_flags == flags); | |
1808 | ||
1809 | elf_elfheader (abfd)->e_flags = flags; | |
1810 | elf_flags_init (abfd) = true; | |
1811 | return true; | |
1812 | } | |
1813 | ||
1814 | /* Copy backend specific data from one object module to another */ | |
1815 | static boolean | |
1816 | v850_elf_copy_private_bfd_data (ibfd, obfd) | |
1817 | bfd * ibfd; | |
1818 | bfd * obfd; | |
1819 | { | |
1820 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1821 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1822 | return true; | |
1823 | ||
1824 | BFD_ASSERT (!elf_flags_init (obfd) | |
1825 | || (elf_elfheader (obfd)->e_flags | |
1826 | == elf_elfheader (ibfd)->e_flags)); | |
1827 | ||
1828 | elf_gp (obfd) = elf_gp (ibfd); | |
1829 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
1830 | elf_flags_init (obfd) = true; | |
1831 | return true; | |
1832 | } | |
1833 | ||
1834 | /* Merge backend specific data from an object file to the output | |
1835 | object file when linking. */ | |
1836 | static boolean | |
1837 | v850_elf_merge_private_bfd_data (ibfd, obfd) | |
1838 | bfd * ibfd; | |
1839 | bfd * obfd; | |
1840 | { | |
1841 | flagword out_flags; | |
1842 | flagword in_flags; | |
1843 | ||
1844 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1845 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1846 | return true; | |
1847 | ||
1848 | in_flags = elf_elfheader (ibfd)->e_flags; | |
1849 | out_flags = elf_elfheader (obfd)->e_flags; | |
1850 | ||
1851 | if (! elf_flags_init (obfd)) | |
1852 | { | |
1853 | /* If the input is the default architecture then do not | |
1854 | bother setting the flags for the output architecture, | |
1855 | instead allow future merges to do this. If no future | |
1856 | merges ever set these flags then they will retain their | |
1857 | unitialised values, which surprise surprise, correspond | |
1858 | to the default values. */ | |
1859 | if (bfd_get_arch_info (ibfd)->the_default) | |
1860 | return true; | |
1861 | ||
1862 | elf_flags_init (obfd) = true; | |
1863 | elf_elfheader (obfd)->e_flags = in_flags; | |
1864 | ||
1865 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1866 | && bfd_get_arch_info (obfd)->the_default) | |
1867 | { | |
1868 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
1869 | } | |
1870 | ||
1871 | return true; | |
1872 | } | |
1873 | ||
1874 | /* Check flag compatibility. */ | |
1875 | if (in_flags == out_flags) | |
1876 | return true; | |
1877 | ||
1878 | if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH) | |
1879 | && (in_flags & EF_V850_ARCH) != E_V850_ARCH) | |
1880 | _bfd_error_handler (_("%s: Architecture mismatch with previous modules"), | |
1881 | bfd_get_filename (ibfd)); | |
1882 | ||
1883 | return true; | |
1884 | } | |
1885 | /* Display the flags field */ | |
1886 | ||
1887 | static boolean | |
1888 | v850_elf_print_private_bfd_data (abfd, ptr) | |
1889 | bfd * abfd; | |
1890 | PTR ptr; | |
1891 | { | |
1892 | FILE * file = (FILE *) ptr; | |
1893 | ||
1894 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1895 | ||
1896 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1897 | ||
1898 | /* xgettext:c-format */ | |
1899 | fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags); | |
1900 | ||
1901 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) | |
1902 | { | |
1903 | default: | |
1904 | case E_V850_ARCH: fprintf (file, _("v850 architecture")); break; | |
1905 | case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break; | |
1906 | case E_V850EA_ARCH: fprintf (file, _("v850ea architecture")); break; | |
1907 | } | |
1908 | ||
1909 | fputc ('\n', file); | |
1910 | ||
1911 | return true; | |
1912 | } | |
1913 | ||
1914 | /* V850 ELF uses four common sections. One is the usual one, and the | |
1915 | others are for (small) objects in one of the special data areas: | |
1916 | small, tiny and zero. All the objects are kept together, and then | |
1917 | referenced via the gp register, the ep register or the r0 register | |
1918 | respectively, which yields smaller, faster assembler code. This | |
1919 | approach is copied from elf32-mips.c. */ | |
1920 | ||
1921 | static asection v850_elf_scom_section; | |
1922 | static asymbol v850_elf_scom_symbol; | |
1923 | static asymbol * v850_elf_scom_symbol_ptr; | |
1924 | static asection v850_elf_tcom_section; | |
1925 | static asymbol v850_elf_tcom_symbol; | |
1926 | static asymbol * v850_elf_tcom_symbol_ptr; | |
1927 | static asection v850_elf_zcom_section; | |
1928 | static asymbol v850_elf_zcom_symbol; | |
1929 | static asymbol * v850_elf_zcom_symbol_ptr; | |
1930 | ||
1931 | ||
1932 | /* Given a BFD section, try to locate the corresponding ELF section | |
1933 | index. */ | |
1934 | ||
1935 | static boolean | |
1936 | v850_elf_section_from_bfd_section (abfd, hdr, sec, retval) | |
1937 | bfd * abfd; | |
1938 | Elf32_Internal_Shdr * hdr; | |
1939 | asection * sec; | |
1940 | int * retval; | |
1941 | { | |
1942 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) | |
1943 | *retval = SHN_V850_SCOMMON; | |
1944 | else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0) | |
1945 | *retval = SHN_V850_TCOMMON; | |
1946 | else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0) | |
1947 | *retval = SHN_V850_ZCOMMON; | |
1948 | else | |
1949 | return false; | |
1950 | ||
1951 | return true; | |
1952 | } | |
1953 | ||
1954 | /* Handle the special V850 section numbers that a symbol may use. */ | |
1955 | ||
1956 | static void | |
1957 | v850_elf_symbol_processing (abfd, asym) | |
1958 | bfd * abfd; | |
1959 | asymbol * asym; | |
1960 | { | |
1961 | elf_symbol_type * elfsym = (elf_symbol_type *) asym; | |
1962 | unsigned short index; | |
1963 | ||
1964 | index = elfsym->internal_elf_sym.st_shndx; | |
1965 | ||
1966 | /* If the section index is an "ordinary" index, then it may | |
1967 | refer to a v850 specific section created by the assembler. | |
1968 | Check the section's type and change the index it matches. | |
1969 | ||
1970 | FIXME: Should we alter the st_shndx field as well ? */ | |
1971 | ||
1972 | if (index < elf_elfheader(abfd)[0].e_shnum) | |
1973 | switch (elf_elfsections(abfd)[index]->sh_type) | |
1974 | { | |
1975 | case SHT_V850_SCOMMON: | |
1976 | index = SHN_V850_SCOMMON; | |
1977 | break; | |
1978 | ||
1979 | case SHT_V850_TCOMMON: | |
1980 | index = SHN_V850_TCOMMON; | |
1981 | break; | |
1982 | ||
1983 | case SHT_V850_ZCOMMON: | |
1984 | index = SHN_V850_ZCOMMON; | |
1985 | break; | |
1986 | ||
1987 | default: | |
1988 | break; | |
1989 | } | |
1990 | ||
1991 | switch (index) | |
1992 | { | |
1993 | case SHN_V850_SCOMMON: | |
1994 | if (v850_elf_scom_section.name == NULL) | |
1995 | { | |
1996 | /* Initialize the small common section. */ | |
1997 | v850_elf_scom_section.name = ".scommon"; | |
1998 | v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA; | |
1999 | v850_elf_scom_section.output_section = & v850_elf_scom_section; | |
2000 | v850_elf_scom_section.symbol = & v850_elf_scom_symbol; | |
2001 | v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr; | |
2002 | v850_elf_scom_symbol.name = ".scommon"; | |
2003 | v850_elf_scom_symbol.flags = BSF_SECTION_SYM; | |
2004 | v850_elf_scom_symbol.section = & v850_elf_scom_section; | |
2005 | v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol; | |
2006 | } | |
2007 | asym->section = & v850_elf_scom_section; | |
2008 | asym->value = elfsym->internal_elf_sym.st_size; | |
2009 | break; | |
2010 | ||
2011 | case SHN_V850_TCOMMON: | |
2012 | if (v850_elf_tcom_section.name == NULL) | |
2013 | { | |
2014 | /* Initialize the tcommon section. */ | |
2015 | v850_elf_tcom_section.name = ".tcommon"; | |
2016 | v850_elf_tcom_section.flags = SEC_IS_COMMON; | |
2017 | v850_elf_tcom_section.output_section = & v850_elf_tcom_section; | |
2018 | v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol; | |
2019 | v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr; | |
2020 | v850_elf_tcom_symbol.name = ".tcommon"; | |
2021 | v850_elf_tcom_symbol.flags = BSF_SECTION_SYM; | |
2022 | v850_elf_tcom_symbol.section = & v850_elf_tcom_section; | |
2023 | v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol; | |
2024 | } | |
2025 | asym->section = & v850_elf_tcom_section; | |
2026 | asym->value = elfsym->internal_elf_sym.st_size; | |
2027 | break; | |
2028 | ||
2029 | case SHN_V850_ZCOMMON: | |
2030 | if (v850_elf_zcom_section.name == NULL) | |
2031 | { | |
2032 | /* Initialize the zcommon section. */ | |
2033 | v850_elf_zcom_section.name = ".zcommon"; | |
2034 | v850_elf_zcom_section.flags = SEC_IS_COMMON; | |
2035 | v850_elf_zcom_section.output_section = & v850_elf_zcom_section; | |
2036 | v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol; | |
2037 | v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr; | |
2038 | v850_elf_zcom_symbol.name = ".zcommon"; | |
2039 | v850_elf_zcom_symbol.flags = BSF_SECTION_SYM; | |
2040 | v850_elf_zcom_symbol.section = & v850_elf_zcom_section; | |
2041 | v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol; | |
2042 | } | |
2043 | asym->section = & v850_elf_zcom_section; | |
2044 | asym->value = elfsym->internal_elf_sym.st_size; | |
2045 | break; | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | /* Hook called by the linker routine which adds symbols from an object | |
2050 | file. We must handle the special v850 section numbers here. */ | |
2051 | ||
2052 | /*ARGSUSED*/ | |
2053 | static boolean | |
2054 | v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
2055 | bfd * abfd; | |
2056 | struct bfd_link_info * info; | |
2057 | const Elf_Internal_Sym * sym; | |
2058 | const char ** namep; | |
2059 | flagword * flagsp; | |
2060 | asection ** secp; | |
2061 | bfd_vma * valp; | |
2062 | { | |
2063 | int index = sym->st_shndx; | |
2064 | ||
2065 | /* If the section index is an "ordinary" index, then it may | |
2066 | refer to a v850 specific section created by the assembler. | |
2067 | Check the section's type and change the index it matches. | |
2068 | ||
2069 | FIXME: Should we alter the st_shndx field as well ? */ | |
2070 | ||
2071 | if (index < elf_elfheader(abfd)[0].e_shnum) | |
2072 | switch (elf_elfsections(abfd)[index]->sh_type) | |
2073 | { | |
2074 | case SHT_V850_SCOMMON: | |
2075 | index = SHN_V850_SCOMMON; | |
2076 | break; | |
2077 | ||
2078 | case SHT_V850_TCOMMON: | |
2079 | index = SHN_V850_TCOMMON; | |
2080 | break; | |
2081 | ||
2082 | case SHT_V850_ZCOMMON: | |
2083 | index = SHN_V850_ZCOMMON; | |
2084 | break; | |
2085 | ||
2086 | default: | |
2087 | break; | |
2088 | } | |
2089 | ||
2090 | switch (index) | |
2091 | { | |
2092 | case SHN_V850_SCOMMON: | |
2093 | *secp = bfd_make_section_old_way (abfd, ".scommon"); | |
2094 | (*secp)->flags |= SEC_IS_COMMON; | |
2095 | *valp = sym->st_size; | |
2096 | break; | |
2097 | ||
2098 | case SHN_V850_TCOMMON: | |
2099 | *secp = bfd_make_section_old_way (abfd, ".tcommon"); | |
2100 | (*secp)->flags |= SEC_IS_COMMON; | |
2101 | *valp = sym->st_size; | |
2102 | break; | |
2103 | ||
2104 | case SHN_V850_ZCOMMON: | |
2105 | *secp = bfd_make_section_old_way (abfd, ".zcommon"); | |
2106 | (*secp)->flags |= SEC_IS_COMMON; | |
2107 | *valp = sym->st_size; | |
2108 | break; | |
2109 | } | |
2110 | ||
2111 | return true; | |
2112 | } | |
2113 | ||
2114 | /*ARGSIGNORED*/ | |
2115 | static boolean | |
2116 | v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec) | |
2117 | bfd * abfd; | |
2118 | struct bfd_link_info * info; | |
2119 | const char * name; | |
2120 | Elf_Internal_Sym * sym; | |
2121 | asection * input_sec; | |
2122 | { | |
2123 | /* If we see a common symbol, which implies a relocatable link, then | |
2124 | if a symbol was in a special common section in an input file, mark | |
2125 | it as a special common in the output file. */ | |
2126 | ||
2127 | if (sym->st_shndx == SHN_COMMON) | |
2128 | { | |
2129 | if (strcmp (input_sec->name, ".scommon") == 0) | |
2130 | sym->st_shndx = SHN_V850_SCOMMON; | |
2131 | else if (strcmp (input_sec->name, ".tcommon") == 0) | |
2132 | sym->st_shndx = SHN_V850_TCOMMON; | |
2133 | else if (strcmp (input_sec->name, ".zcommon") == 0) | |
2134 | sym->st_shndx = SHN_V850_ZCOMMON; | |
2135 | } | |
2136 | ||
2137 | return true; | |
2138 | } | |
2139 | ||
2140 | static boolean | |
2141 | v850_elf_section_from_shdr (abfd, hdr, name) | |
2142 | bfd * abfd; | |
2143 | Elf_Internal_Shdr * hdr; | |
2144 | char * name; | |
2145 | { | |
2146 | /* There ought to be a place to keep ELF backend specific flags, but | |
2147 | at the moment there isn't one. We just keep track of the | |
2148 | sections by their name, instead. */ | |
2149 | ||
2150 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
2151 | return false; | |
2152 | ||
2153 | switch (hdr->sh_type) | |
2154 | { | |
2155 | case SHT_V850_SCOMMON: | |
2156 | case SHT_V850_TCOMMON: | |
2157 | case SHT_V850_ZCOMMON: | |
2158 | if (! bfd_set_section_flags (abfd, hdr->bfd_section, | |
2159 | (bfd_get_section_flags (abfd, | |
2160 | hdr->bfd_section) | |
2161 | | SEC_IS_COMMON))) | |
2162 | return false; | |
2163 | } | |
2164 | ||
2165 | return true; | |
2166 | } | |
2167 | ||
2168 | /* Set the correct type for a V850 ELF section. We do this by the | |
2169 | section name, which is a hack, but ought to work. */ | |
2170 | static boolean | |
2171 | v850_elf_fake_sections (abfd, hdr, sec) | |
2172 | bfd * abfd; | |
2173 | Elf32_Internal_Shdr * hdr; | |
2174 | asection * sec; | |
2175 | { | |
2176 | register const char * name; | |
2177 | ||
2178 | name = bfd_get_section_name (abfd, sec); | |
2179 | ||
2180 | if (strcmp (name, ".scommon") == 0) | |
2181 | { | |
2182 | hdr->sh_type = SHT_V850_SCOMMON; | |
2183 | } | |
2184 | else if (strcmp (name, ".tcommon") == 0) | |
2185 | { | |
2186 | hdr->sh_type = SHT_V850_TCOMMON; | |
2187 | } | |
2188 | else if (strcmp (name, ".zcommon") == 0) | |
2189 | hdr->sh_type = SHT_V850_ZCOMMON; | |
2190 | ||
2191 | return true; | |
2192 | } | |
2193 | ||
2194 | ||
2195 | \f | |
2196 | #define TARGET_LITTLE_SYM bfd_elf32_v850_vec | |
2197 | #define TARGET_LITTLE_NAME "elf32-v850" | |
2198 | #define ELF_ARCH bfd_arch_v850 | |
2199 | #define ELF_MACHINE_CODE EM_CYGNUS_V850 | |
2200 | #define ELF_MAXPAGESIZE 0x1000 | |
2201 | ||
2202 | #define elf_info_to_howto v850_elf_info_to_howto_rela | |
2203 | #define elf_info_to_howto_rel v850_elf_info_to_howto_rel | |
2204 | ||
2205 | #define elf_backend_check_relocs v850_elf_check_relocs | |
2206 | #define elf_backend_relocate_section v850_elf_relocate_section | |
2207 | #define elf_backend_object_p v850_elf_object_p | |
2208 | #define elf_backend_final_write_processing v850_elf_final_write_processing | |
2209 | #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section | |
2210 | #define elf_backend_symbol_processing v850_elf_symbol_processing | |
2211 | #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook | |
2212 | #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook | |
2213 | #define elf_backend_section_from_shdr v850_elf_section_from_shdr | |
2214 | #define elf_backend_fake_sections v850_elf_fake_sections | |
2215 | #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook | |
2216 | #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook | |
2217 | ||
2218 | #define elf_backend_can_gc_sections 1 | |
2219 | ||
2220 | ||
2221 | #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name | |
2222 | #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup | |
2223 | #define bfd_elf32_bfd_copy_private_bfd_data v850_elf_copy_private_bfd_data | |
2224 | #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data | |
2225 | #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags | |
2226 | #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data | |
2227 | ||
2228 | #define elf_symbol_leading_char '_' | |
2229 | ||
2230 | #include "elf32-target.h" |