Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* V850-specific support for 32-bit ELF |
7898deda NC |
2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
252b5132 RH |
21 | /* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char |
22 | dependencies. As is the gas & simulator code or the v850. */ | |
23 | ||
252b5132 RH |
24 | #include "bfd.h" |
25 | #include "sysdep.h" | |
26 | #include "bfdlink.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "elf/v850.h" | |
e12dd2ea | 30 | #include "libiberty.h" |
252b5132 | 31 | |
e12dd2ea | 32 | /* Sign-extend a 24-bit number. */ |
dc810e39 | 33 | #define SEXT24(x) ((((x) & 0xffffff) ^ 0x800000) - 0x800000) |
435b1e90 | 34 | |
252b5132 RH |
35 | static reloc_howto_type *v850_elf_reloc_type_lookup |
36 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
37 | static void v850_elf_info_to_howto_rel | |
38 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
39 | static void v850_elf_info_to_howto_rela | |
40 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
41 | static bfd_reloc_status_type v850_elf_reloc | |
42 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
43 | static boolean v850_elf_is_local_label_name | |
44 | PARAMS ((bfd *, const char *)); | |
45 | static boolean v850_elf_relocate_section | |
46 | PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
47 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
48 | static bfd_reloc_status_type v850_elf_perform_relocation | |
dc810e39 | 49 | PARAMS ((bfd *, unsigned int, bfd_vma, bfd_byte *)); |
252b5132 RH |
50 | static boolean v850_elf_check_relocs |
51 | PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); | |
52 | static void remember_hi16s_reloc | |
53 | PARAMS ((bfd *, bfd_vma, bfd_byte *)); | |
54 | static bfd_byte * find_remembered_hi16s_reloc | |
55 | PARAMS ((bfd_vma, boolean *)); | |
56 | static bfd_reloc_status_type v850_elf_final_link_relocate | |
57 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, bfd_vma, | |
58 | bfd_vma, bfd_vma, struct bfd_link_info *, asection *, int)); | |
59 | static boolean v850_elf_object_p | |
60 | PARAMS ((bfd *)); | |
61 | static boolean v850_elf_fake_sections | |
62 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); | |
63 | static void v850_elf_final_write_processing | |
64 | PARAMS ((bfd *, boolean)); | |
65 | static boolean v850_elf_set_private_flags | |
66 | PARAMS ((bfd *, flagword)); | |
67 | static boolean v850_elf_copy_private_bfd_data | |
68 | PARAMS ((bfd *, bfd *)); | |
69 | static boolean v850_elf_merge_private_bfd_data | |
70 | PARAMS ((bfd *, bfd *)); | |
71 | static boolean v850_elf_print_private_bfd_data | |
72 | PARAMS ((bfd *, PTR)); | |
73 | static boolean v850_elf_section_from_bfd_section | |
74 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *)); | |
75 | static void v850_elf_symbol_processing | |
76 | PARAMS ((bfd *, asymbol *)); | |
77 | static boolean v850_elf_add_symbol_hook | |
78 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
79 | const char **, flagword *, asection **, bfd_vma *)); | |
80 | static boolean v850_elf_link_output_symbol_hook | |
81 | PARAMS ((bfd *, struct bfd_link_info *, const char *, | |
82 | Elf_Internal_Sym *, asection *)); | |
83 | static boolean v850_elf_section_from_shdr | |
84 | PARAMS ((bfd *, Elf_Internal_Shdr *, char *)); | |
e12dd2ea NC |
85 | static boolean v850_elf_gc_sweep_hook |
86 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
87 | const Elf_Internal_Rela *)); | |
88 | static asection * v850_elf_gc_mark_hook | |
89 | PARAMS ((bfd *, struct bfd_link_info *, | |
90 | Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
91 | Elf_Internal_Sym *)); | |
92 | ||
93 | /* Note: It is REQUIRED that the 'type' value of each entry | |
94 | in this array match the index of the entry in the array. */ | |
252b5132 RH |
95 | static reloc_howto_type v850_elf_howto_table[] = |
96 | { | |
97 | /* This reloc does nothing. */ | |
98 | HOWTO (R_V850_NONE, /* type */ | |
99 | 0, /* rightshift */ | |
100 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
101 | 32, /* bitsize */ | |
102 | false, /* pc_relative */ | |
103 | 0, /* bitpos */ | |
104 | complain_overflow_bitfield, /* complain_on_overflow */ | |
105 | bfd_elf_generic_reloc, /* special_function */ | |
106 | "R_V850_NONE", /* name */ | |
107 | false, /* partial_inplace */ | |
108 | 0, /* src_mask */ | |
109 | 0, /* dst_mask */ | |
110 | false), /* pcrel_offset */ | |
111 | ||
435b1e90 | 112 | /* A PC relative 9 bit branch. */ |
252b5132 RH |
113 | HOWTO (R_V850_9_PCREL, /* type */ |
114 | 2, /* rightshift */ | |
115 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
116 | 26, /* bitsize */ | |
117 | true, /* pc_relative */ | |
118 | 0, /* bitpos */ | |
119 | complain_overflow_bitfield, /* complain_on_overflow */ | |
120 | v850_elf_reloc, /* special_function */ | |
121 | "R_V850_9_PCREL", /* name */ | |
122 | false, /* partial_inplace */ | |
123 | 0x00ffffff, /* src_mask */ | |
124 | 0x00ffffff, /* dst_mask */ | |
125 | true), /* pcrel_offset */ | |
126 | ||
435b1e90 | 127 | /* A PC relative 22 bit branch. */ |
252b5132 RH |
128 | HOWTO (R_V850_22_PCREL, /* type */ |
129 | 2, /* rightshift */ | |
130 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
131 | 22, /* bitsize */ | |
132 | true, /* pc_relative */ | |
133 | 7, /* bitpos */ | |
134 | complain_overflow_signed, /* complain_on_overflow */ | |
135 | v850_elf_reloc, /* special_function */ | |
136 | "R_V850_22_PCREL", /* name */ | |
137 | false, /* partial_inplace */ | |
138 | 0x07ffff80, /* src_mask */ | |
139 | 0x07ffff80, /* dst_mask */ | |
140 | true), /* pcrel_offset */ | |
141 | ||
142 | /* High 16 bits of symbol value. */ | |
143 | HOWTO (R_V850_HI16_S, /* type */ | |
144 | 0, /* rightshift */ | |
145 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
146 | 16, /* bitsize */ | |
147 | false, /* pc_relative */ | |
148 | 0, /* bitpos */ | |
149 | complain_overflow_dont, /* complain_on_overflow */ | |
150 | v850_elf_reloc, /* special_function */ | |
151 | "R_V850_HI16_S", /* name */ | |
5c746d90 | 152 | false, /* partial_inplace */ |
252b5132 RH |
153 | 0xffff, /* src_mask */ |
154 | 0xffff, /* dst_mask */ | |
155 | false), /* pcrel_offset */ | |
156 | ||
157 | /* High 16 bits of symbol value. */ | |
158 | HOWTO (R_V850_HI16, /* type */ | |
159 | 0, /* rightshift */ | |
160 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
161 | 16, /* bitsize */ | |
162 | false, /* pc_relative */ | |
163 | 0, /* bitpos */ | |
164 | complain_overflow_dont, /* complain_on_overflow */ | |
165 | v850_elf_reloc, /* special_function */ | |
166 | "R_V850_HI16", /* name */ | |
5c746d90 | 167 | false, /* partial_inplace */ |
252b5132 RH |
168 | 0xffff, /* src_mask */ |
169 | 0xffff, /* dst_mask */ | |
170 | false), /* pcrel_offset */ | |
171 | ||
172 | /* Low 16 bits of symbol value. */ | |
173 | HOWTO (R_V850_LO16, /* type */ | |
174 | 0, /* rightshift */ | |
175 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
176 | 16, /* bitsize */ | |
177 | false, /* pc_relative */ | |
178 | 0, /* bitpos */ | |
179 | complain_overflow_dont, /* complain_on_overflow */ | |
180 | v850_elf_reloc, /* special_function */ | |
181 | "R_V850_LO16", /* name */ | |
5c746d90 | 182 | false, /* partial_inplace */ |
252b5132 RH |
183 | 0xffff, /* src_mask */ |
184 | 0xffff, /* dst_mask */ | |
185 | false), /* pcrel_offset */ | |
186 | ||
187 | /* Simple 32bit reloc. */ | |
188 | HOWTO (R_V850_32, /* type */ | |
189 | 0, /* rightshift */ | |
190 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
191 | 32, /* bitsize */ | |
192 | false, /* pc_relative */ | |
193 | 0, /* bitpos */ | |
194 | complain_overflow_dont, /* complain_on_overflow */ | |
195 | v850_elf_reloc, /* special_function */ | |
196 | "R_V850_32", /* name */ | |
5c746d90 | 197 | false, /* partial_inplace */ |
252b5132 RH |
198 | 0xffffffff, /* src_mask */ |
199 | 0xffffffff, /* dst_mask */ | |
200 | false), /* pcrel_offset */ | |
201 | ||
202 | /* Simple 16bit reloc. */ | |
203 | HOWTO (R_V850_16, /* type */ | |
204 | 0, /* rightshift */ | |
205 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
206 | 16, /* bitsize */ | |
207 | false, /* pc_relative */ | |
208 | 0, /* bitpos */ | |
209 | complain_overflow_dont, /* complain_on_overflow */ | |
210 | bfd_elf_generic_reloc, /* special_function */ | |
211 | "R_V850_16", /* name */ | |
5c746d90 | 212 | false, /* partial_inplace */ |
252b5132 RH |
213 | 0xffff, /* src_mask */ |
214 | 0xffff, /* dst_mask */ | |
215 | false), /* pcrel_offset */ | |
216 | ||
217 | /* Simple 8bit reloc. */ | |
218 | HOWTO (R_V850_8, /* type */ | |
219 | 0, /* rightshift */ | |
220 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
221 | 8, /* bitsize */ | |
222 | false, /* pc_relative */ | |
223 | 0, /* bitpos */ | |
224 | complain_overflow_dont, /* complain_on_overflow */ | |
225 | bfd_elf_generic_reloc, /* special_function */ | |
226 | "R_V850_8", /* name */ | |
5c746d90 | 227 | false, /* partial_inplace */ |
252b5132 RH |
228 | 0xff, /* src_mask */ |
229 | 0xff, /* dst_mask */ | |
230 | false), /* pcrel_offset */ | |
231 | ||
232 | /* 16 bit offset from the short data area pointer. */ | |
233 | HOWTO (R_V850_SDA_16_16_OFFSET, /* type */ | |
234 | 0, /* rightshift */ | |
235 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
236 | 16, /* bitsize */ | |
237 | false, /* pc_relative */ | |
238 | 0, /* bitpos */ | |
239 | complain_overflow_dont, /* complain_on_overflow */ | |
240 | v850_elf_reloc, /* special_function */ | |
241 | "R_V850_SDA_16_16_OFFSET", /* name */ | |
242 | false, /* partial_inplace */ | |
243 | 0xffff, /* src_mask */ | |
244 | 0xffff, /* dst_mask */ | |
245 | false), /* pcrel_offset */ | |
246 | ||
247 | /* 15 bit offset from the short data area pointer. */ | |
248 | HOWTO (R_V850_SDA_15_16_OFFSET, /* type */ | |
249 | 1, /* rightshift */ | |
250 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
251 | 16, /* bitsize */ | |
252 | false, /* pc_relative */ | |
253 | 1, /* bitpos */ | |
254 | complain_overflow_dont, /* complain_on_overflow */ | |
255 | v850_elf_reloc, /* special_function */ | |
256 | "R_V850_SDA_15_16_OFFSET", /* name */ | |
257 | false, /* partial_inplace */ | |
258 | 0xfffe, /* src_mask */ | |
259 | 0xfffe, /* dst_mask */ | |
260 | false), /* pcrel_offset */ | |
261 | ||
262 | /* 16 bit offset from the zero data area pointer. */ | |
263 | HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */ | |
264 | 0, /* rightshift */ | |
265 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
266 | 16, /* bitsize */ | |
267 | false, /* pc_relative */ | |
268 | 0, /* bitpos */ | |
269 | complain_overflow_dont, /* complain_on_overflow */ | |
270 | v850_elf_reloc, /* special_function */ | |
271 | "R_V850_ZDA_16_16_OFFSET", /* name */ | |
272 | false, /* partial_inplace */ | |
273 | 0xffff, /* src_mask */ | |
274 | 0xffff, /* dst_mask */ | |
275 | false), /* pcrel_offset */ | |
276 | ||
277 | /* 15 bit offset from the zero data area pointer. */ | |
278 | HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */ | |
279 | 1, /* rightshift */ | |
280 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
281 | 16, /* bitsize */ | |
282 | false, /* pc_relative */ | |
283 | 1, /* bitpos */ | |
284 | complain_overflow_dont, /* complain_on_overflow */ | |
285 | v850_elf_reloc, /* special_function */ | |
286 | "R_V850_ZDA_15_16_OFFSET", /* name */ | |
287 | false, /* partial_inplace */ | |
288 | 0xfffe, /* src_mask */ | |
289 | 0xfffe, /* dst_mask */ | |
290 | false), /* pcrel_offset */ | |
291 | ||
292 | /* 6 bit offset from the tiny data area pointer. */ | |
293 | HOWTO (R_V850_TDA_6_8_OFFSET, /* type */ | |
294 | 2, /* rightshift */ | |
295 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
296 | 8, /* bitsize */ | |
297 | false, /* pc_relative */ | |
298 | 1, /* bitpos */ | |
299 | complain_overflow_dont, /* complain_on_overflow */ | |
300 | v850_elf_reloc, /* special_function */ | |
301 | "R_V850_TDA_6_8_OFFSET", /* name */ | |
302 | false, /* partial_inplace */ | |
303 | 0x7e, /* src_mask */ | |
304 | 0x7e, /* dst_mask */ | |
305 | false), /* pcrel_offset */ | |
306 | ||
307 | /* 8 bit offset from the tiny data area pointer. */ | |
308 | HOWTO (R_V850_TDA_7_8_OFFSET, /* type */ | |
309 | 1, /* rightshift */ | |
310 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
311 | 8, /* bitsize */ | |
312 | false, /* pc_relative */ | |
313 | 0, /* bitpos */ | |
314 | complain_overflow_dont, /* complain_on_overflow */ | |
315 | v850_elf_reloc, /* special_function */ | |
316 | "R_V850_TDA_7_8_OFFSET", /* name */ | |
317 | false, /* partial_inplace */ | |
318 | 0x7f, /* src_mask */ | |
319 | 0x7f, /* dst_mask */ | |
320 | false), /* pcrel_offset */ | |
435b1e90 | 321 | |
252b5132 RH |
322 | /* 7 bit offset from the tiny data area pointer. */ |
323 | HOWTO (R_V850_TDA_7_7_OFFSET, /* type */ | |
324 | 0, /* rightshift */ | |
325 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
326 | 7, /* bitsize */ | |
327 | false, /* pc_relative */ | |
328 | 0, /* bitpos */ | |
329 | complain_overflow_dont, /* complain_on_overflow */ | |
330 | v850_elf_reloc, /* special_function */ | |
331 | "R_V850_TDA_7_7_OFFSET", /* name */ | |
332 | false, /* partial_inplace */ | |
333 | 0x7f, /* src_mask */ | |
334 | 0x7f, /* dst_mask */ | |
335 | false), /* pcrel_offset */ | |
336 | ||
337 | /* 16 bit offset from the tiny data area pointer! */ | |
338 | HOWTO (R_V850_TDA_16_16_OFFSET, /* type */ | |
339 | 0, /* rightshift */ | |
340 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
341 | 16, /* bitsize */ | |
342 | false, /* pc_relative */ | |
343 | 0, /* bitpos */ | |
344 | complain_overflow_dont, /* complain_on_overflow */ | |
345 | v850_elf_reloc, /* special_function */ | |
346 | "R_V850_TDA_16_16_OFFSET", /* name */ | |
347 | false, /* partial_inplace */ | |
348 | 0xffff, /* src_mask */ | |
349 | 0xfff, /* dst_mask */ | |
350 | false), /* pcrel_offset */ | |
351 | ||
352 | /* 5 bit offset from the tiny data area pointer. */ | |
353 | HOWTO (R_V850_TDA_4_5_OFFSET, /* type */ | |
354 | 1, /* rightshift */ | |
355 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
356 | 5, /* bitsize */ | |
357 | false, /* pc_relative */ | |
358 | 0, /* bitpos */ | |
359 | complain_overflow_dont, /* complain_on_overflow */ | |
360 | v850_elf_reloc, /* special_function */ | |
361 | "R_V850_TDA_4_5_OFFSET", /* name */ | |
362 | false, /* partial_inplace */ | |
363 | 0x0f, /* src_mask */ | |
364 | 0x0f, /* dst_mask */ | |
365 | false), /* pcrel_offset */ | |
366 | ||
367 | /* 4 bit offset from the tiny data area pointer. */ | |
368 | HOWTO (R_V850_TDA_4_4_OFFSET, /* type */ | |
369 | 0, /* rightshift */ | |
370 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
371 | 4, /* bitsize */ | |
372 | false, /* pc_relative */ | |
373 | 0, /* bitpos */ | |
374 | complain_overflow_dont, /* complain_on_overflow */ | |
375 | v850_elf_reloc, /* special_function */ | |
376 | "R_V850_TDA_4_4_OFFSET", /* name */ | |
377 | false, /* partial_inplace */ | |
378 | 0x0f, /* src_mask */ | |
379 | 0x0f, /* dst_mask */ | |
380 | false), /* pcrel_offset */ | |
381 | ||
382 | /* 16 bit offset from the short data area pointer. */ | |
383 | HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */ | |
384 | 0, /* rightshift */ | |
385 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
386 | 16, /* bitsize */ | |
387 | false, /* pc_relative */ | |
388 | 0, /* bitpos */ | |
389 | complain_overflow_dont, /* complain_on_overflow */ | |
390 | v850_elf_reloc, /* special_function */ | |
391 | "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */ | |
392 | false, /* partial_inplace */ | |
393 | 0xfffe0020, /* src_mask */ | |
394 | 0xfffe0020, /* dst_mask */ | |
395 | false), /* pcrel_offset */ | |
396 | ||
397 | /* 16 bit offset from the zero data area pointer. */ | |
398 | HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */ | |
399 | 0, /* rightshift */ | |
400 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
401 | 16, /* bitsize */ | |
402 | false, /* pc_relative */ | |
403 | 0, /* bitpos */ | |
404 | complain_overflow_dont, /* complain_on_overflow */ | |
405 | v850_elf_reloc, /* special_function */ | |
406 | "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */ | |
407 | false, /* partial_inplace */ | |
408 | 0xfffe0020, /* src_mask */ | |
409 | 0xfffe0020, /* dst_mask */ | |
410 | false), /* pcrel_offset */ | |
411 | ||
412 | /* 6 bit offset from the call table base pointer. */ | |
413 | HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */ | |
414 | 0, /* rightshift */ | |
415 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
416 | 7, /* bitsize */ | |
417 | false, /* pc_relative */ | |
418 | 0, /* bitpos */ | |
419 | complain_overflow_dont, /* complain_on_overflow */ | |
420 | v850_elf_reloc, /* special_function */ | |
421 | "R_V850_CALLT_6_7_OFFSET", /* name */ | |
422 | false, /* partial_inplace */ | |
423 | 0x3f, /* src_mask */ | |
424 | 0x3f, /* dst_mask */ | |
425 | false), /* pcrel_offset */ | |
426 | ||
427 | /* 16 bit offset from the call table base pointer. */ | |
428 | HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */ | |
429 | 0, /* rightshift */ | |
430 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
431 | 16, /* bitsize */ | |
432 | false, /* pc_relative */ | |
433 | 0, /* bitpos */ | |
434 | complain_overflow_dont, /* complain_on_overflow */ | |
435 | v850_elf_reloc, /* special_function */ | |
436 | "R_V850_CALLT_16_16_OFFSET", /* name */ | |
437 | false, /* partial_inplace */ | |
438 | 0xffff, /* src_mask */ | |
439 | 0xffff, /* dst_mask */ | |
440 | false), /* pcrel_offset */ | |
441 | ||
442 | /* GNU extension to record C++ vtable hierarchy */ | |
443 | HOWTO (R_V850_GNU_VTINHERIT, /* type */ | |
444 | 0, /* rightshift */ | |
445 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
446 | 0, /* bitsize */ | |
447 | false, /* pc_relative */ | |
448 | 0, /* bitpos */ | |
449 | complain_overflow_dont, /* complain_on_overflow */ | |
450 | NULL, /* special_function */ | |
451 | "R_V850_GNU_VTINHERIT", /* name */ | |
452 | false, /* partial_inplace */ | |
453 | 0, /* src_mask */ | |
454 | 0, /* dst_mask */ | |
455 | false), /* pcrel_offset */ | |
456 | ||
457 | /* GNU extension to record C++ vtable member usage */ | |
458 | HOWTO (R_V850_GNU_VTENTRY, /* type */ | |
459 | 0, /* rightshift */ | |
460 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
461 | 0, /* bitsize */ | |
462 | false, /* pc_relative */ | |
463 | 0, /* bitpos */ | |
464 | complain_overflow_dont, /* complain_on_overflow */ | |
465 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
466 | "R_V850_GNU_VTENTRY", /* name */ | |
467 | false, /* partial_inplace */ | |
468 | 0, /* src_mask */ | |
469 | 0, /* dst_mask */ | |
470 | false), /* pcrel_offset */ | |
435b1e90 | 471 | |
252b5132 RH |
472 | }; |
473 | ||
474 | /* Map BFD reloc types to V850 ELF reloc types. */ | |
475 | ||
476 | struct v850_elf_reloc_map | |
477 | { | |
478 | /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an | |
479 | unsigned char. */ | |
480 | bfd_reloc_code_real_type bfd_reloc_val; | |
917583ad | 481 | unsigned int elf_reloc_val; |
252b5132 RH |
482 | }; |
483 | ||
484 | static const struct v850_elf_reloc_map v850_elf_reloc_map[] = | |
485 | { | |
486 | { BFD_RELOC_NONE, R_V850_NONE }, | |
487 | { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL }, | |
488 | { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL }, | |
489 | { BFD_RELOC_HI16_S, R_V850_HI16_S }, | |
490 | { BFD_RELOC_HI16, R_V850_HI16 }, | |
491 | { BFD_RELOC_LO16, R_V850_LO16 }, | |
492 | { BFD_RELOC_32, R_V850_32 }, | |
493 | { BFD_RELOC_16, R_V850_16 }, | |
494 | { BFD_RELOC_8, R_V850_8 }, | |
495 | { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET }, | |
496 | { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET }, | |
497 | { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET }, | |
498 | { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET }, | |
499 | { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET }, | |
500 | { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET }, | |
501 | { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET }, | |
502 | { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET }, | |
503 | { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET }, | |
504 | { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET }, | |
505 | { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET }, | |
506 | { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET }, | |
507 | { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET }, | |
508 | { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET }, | |
509 | { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT }, | |
510 | { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY }, | |
511 | ||
512 | }; | |
252b5132 | 513 | \f |
e12dd2ea NC |
514 | /* Map a bfd relocation into the appropriate howto structure. */ |
515 | ||
252b5132 RH |
516 | static reloc_howto_type * |
517 | v850_elf_reloc_type_lookup (abfd, code) | |
5f771d47 | 518 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
519 | bfd_reloc_code_real_type code; |
520 | { | |
521 | unsigned int i; | |
522 | ||
e12dd2ea NC |
523 | for (i = ARRAY_SIZE (v850_elf_reloc_map); i --;) |
524 | if (v850_elf_reloc_map[i].bfd_reloc_val == code) | |
525 | { | |
917583ad | 526 | unsigned int elf_reloc_val = v850_elf_reloc_map[i].elf_reloc_val; |
dc810e39 | 527 | |
fbad9a25 | 528 | BFD_ASSERT (v850_elf_howto_table[elf_reloc_val].type == elf_reloc_val); |
435b1e90 | 529 | |
fbad9a25 | 530 | return v850_elf_howto_table + elf_reloc_val; |
e12dd2ea | 531 | } |
252b5132 RH |
532 | |
533 | return NULL; | |
534 | } | |
252b5132 RH |
535 | \f |
536 | /* Set the howto pointer for an V850 ELF reloc. */ | |
e12dd2ea | 537 | |
252b5132 RH |
538 | static void |
539 | v850_elf_info_to_howto_rel (abfd, cache_ptr, dst) | |
5f771d47 | 540 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
541 | arelent * cache_ptr; |
542 | Elf32_Internal_Rel * dst; | |
543 | { | |
544 | unsigned int r_type; | |
545 | ||
546 | r_type = ELF32_R_TYPE (dst->r_info); | |
547 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); | |
548 | cache_ptr->howto = &v850_elf_howto_table[r_type]; | |
549 | } | |
550 | ||
435b1e90 | 551 | /* Set the howto pointer for a V850 ELF reloc (type RELA). */ |
252b5132 RH |
552 | static void |
553 | v850_elf_info_to_howto_rela (abfd, cache_ptr, dst) | |
5f771d47 | 554 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
555 | arelent * cache_ptr; |
556 | Elf32_Internal_Rela *dst; | |
557 | { | |
558 | unsigned int r_type; | |
559 | ||
560 | r_type = ELF32_R_TYPE (dst->r_info); | |
561 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); | |
562 | cache_ptr->howto = &v850_elf_howto_table[r_type]; | |
563 | } | |
252b5132 RH |
564 | \f |
565 | /* Look through the relocs for a section during the first phase, and | |
566 | allocate space in the global offset table or procedure linkage | |
567 | table. */ | |
568 | ||
569 | static boolean | |
570 | v850_elf_check_relocs (abfd, info, sec, relocs) | |
571 | bfd * abfd; | |
572 | struct bfd_link_info * info; | |
573 | asection * sec; | |
574 | const Elf_Internal_Rela * relocs; | |
575 | { | |
576 | boolean ret = true; | |
577 | bfd *dynobj; | |
578 | Elf_Internal_Shdr *symtab_hdr; | |
579 | struct elf_link_hash_entry **sym_hashes; | |
580 | const Elf_Internal_Rela *rel; | |
581 | const Elf_Internal_Rela *rel_end; | |
582 | asection *sreloc; | |
583 | enum v850_reloc_type r_type; | |
584 | int other = 0; | |
585 | const char *common = (const char *)0; | |
586 | ||
587 | if (info->relocateable) | |
588 | return true; | |
589 | ||
590 | #ifdef DEBUG | |
591 | fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n", | |
592 | bfd_get_section_name (abfd, sec), | |
593 | bfd_get_filename (abfd)); | |
594 | #endif | |
595 | ||
596 | dynobj = elf_hash_table (info)->dynobj; | |
597 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
598 | sym_hashes = elf_sym_hashes (abfd); | |
599 | sreloc = NULL; | |
600 | ||
601 | rel_end = relocs + sec->reloc_count; | |
602 | for (rel = relocs; rel < rel_end; rel++) | |
603 | { | |
604 | unsigned long r_symndx; | |
605 | struct elf_link_hash_entry *h; | |
606 | ||
607 | r_symndx = ELF32_R_SYM (rel->r_info); | |
608 | if (r_symndx < symtab_hdr->sh_info) | |
609 | h = NULL; | |
610 | else | |
611 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
612 | ||
613 | r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info); | |
614 | switch (r_type) | |
615 | { | |
616 | default: | |
617 | case R_V850_NONE: | |
618 | case R_V850_9_PCREL: | |
619 | case R_V850_22_PCREL: | |
620 | case R_V850_HI16_S: | |
621 | case R_V850_HI16: | |
622 | case R_V850_LO16: | |
623 | case R_V850_32: | |
624 | case R_V850_16: | |
625 | case R_V850_8: | |
626 | case R_V850_CALLT_6_7_OFFSET: | |
627 | case R_V850_CALLT_16_16_OFFSET: | |
628 | break; | |
629 | ||
630 | /* This relocation describes the C++ object vtable hierarchy. | |
631 | Reconstruct it for later use during GC. */ | |
632 | case R_V850_GNU_VTINHERIT: | |
633 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
634 | return false; | |
635 | break; | |
636 | ||
e12dd2ea NC |
637 | /* This relocation describes which C++ vtable entries |
638 | are actually used. Record for later use during GC. */ | |
252b5132 RH |
639 | case R_V850_GNU_VTENTRY: |
640 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
641 | return false; | |
642 | break; | |
643 | ||
644 | case R_V850_SDA_16_16_SPLIT_OFFSET: | |
645 | case R_V850_SDA_16_16_OFFSET: | |
646 | case R_V850_SDA_15_16_OFFSET: | |
647 | other = V850_OTHER_SDA; | |
648 | common = ".scommon"; | |
649 | goto small_data_common; | |
435b1e90 | 650 | |
252b5132 RH |
651 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
652 | case R_V850_ZDA_16_16_OFFSET: | |
653 | case R_V850_ZDA_15_16_OFFSET: | |
654 | other = V850_OTHER_ZDA; | |
655 | common = ".zcommon"; | |
656 | goto small_data_common; | |
435b1e90 | 657 | |
252b5132 RH |
658 | case R_V850_TDA_4_5_OFFSET: |
659 | case R_V850_TDA_4_4_OFFSET: | |
660 | case R_V850_TDA_6_8_OFFSET: | |
661 | case R_V850_TDA_7_8_OFFSET: | |
662 | case R_V850_TDA_7_7_OFFSET: | |
663 | case R_V850_TDA_16_16_OFFSET: | |
664 | other = V850_OTHER_TDA; | |
665 | common = ".tcommon"; | |
666 | /* fall through */ | |
667 | ||
668 | #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA) | |
669 | ||
670 | small_data_common: | |
671 | if (h) | |
672 | { | |
e12dd2ea NC |
673 | /* Flag which type of relocation was used. */ |
674 | h->other |= other; | |
252b5132 RH |
675 | if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK) |
676 | && (h->other & V850_OTHER_ERROR) == 0) | |
677 | { | |
678 | const char * msg; | |
679 | static char buff[200]; /* XXX */ | |
680 | ||
681 | switch (h->other & V850_OTHER_MASK) | |
682 | { | |
683 | default: | |
684 | msg = _("Variable `%s' cannot occupy in multiple small data regions"); | |
685 | break; | |
686 | case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA: | |
687 | msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions"); | |
688 | break; | |
689 | case V850_OTHER_SDA | V850_OTHER_ZDA: | |
690 | msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously"); | |
691 | break; | |
692 | case V850_OTHER_SDA | V850_OTHER_TDA: | |
693 | msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously"); | |
694 | break; | |
695 | case V850_OTHER_ZDA | V850_OTHER_TDA: | |
696 | msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously"); | |
697 | break; | |
698 | } | |
699 | ||
700 | sprintf (buff, msg, h->root.root.string); | |
701 | info->callbacks->warning (info, buff, h->root.root.string, | |
dc810e39 AM |
702 | abfd, h->root.u.def.section, |
703 | (bfd_vma) 0); | |
252b5132 RH |
704 | |
705 | bfd_set_error (bfd_error_bad_value); | |
706 | h->other |= V850_OTHER_ERROR; | |
707 | ret = false; | |
708 | } | |
709 | } | |
710 | ||
711 | if (h && h->root.type == bfd_link_hash_common | |
712 | && h->root.u.c.p | |
713 | && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON")) | |
714 | { | |
e12dd2ea NC |
715 | asection * section; |
716 | ||
717 | section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common); | |
252b5132 RH |
718 | section->flags |= SEC_IS_COMMON; |
719 | } | |
720 | ||
721 | #ifdef DEBUG | |
722 | fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n", | |
723 | v850_elf_howto_table[ (int)r_type ].name, | |
724 | (h && h->root.root.string) ? h->root.root.string : "<unknown>", | |
725 | (h->root.type == bfd_link_hash_common) ? ", symbol is common" : ""); | |
726 | #endif | |
727 | break; | |
728 | } | |
729 | } | |
730 | ||
731 | return ret; | |
732 | } | |
733 | ||
e12dd2ea NC |
734 | /* In the old version, when an entry was checked out from the table, |
735 | it was deleted. This produced an error if the entry was needed | |
736 | more than once, as the second attempted retry failed. | |
737 | ||
738 | In the current version, the entry is not deleted, instead we set | |
739 | the field 'found' to true. If a second lookup matches the same | |
740 | entry, then we know that the hi16s reloc has already been updated | |
741 | and does not need to be updated a second time. | |
742 | ||
743 | TODO - TOFIX: If it is possible that we need to restore 2 different | |
744 | addresses from the same table entry, where the first generates an | |
745 | overflow, whilst the second do not, then this code will fail. */ | |
252b5132 RH |
746 | |
747 | typedef struct hi16s_location | |
748 | { | |
749 | bfd_vma addend; | |
750 | bfd_byte * address; | |
751 | unsigned long counter; | |
752 | boolean found; | |
753 | struct hi16s_location * next; | |
754 | } | |
755 | hi16s_location; | |
756 | ||
757 | static hi16s_location * previous_hi16s; | |
758 | static hi16s_location * free_hi16s; | |
759 | static unsigned long hi16s_counter; | |
760 | ||
761 | static void | |
762 | remember_hi16s_reloc (abfd, addend, address) | |
763 | bfd * abfd; | |
764 | bfd_vma addend; | |
765 | bfd_byte * address; | |
766 | { | |
767 | hi16s_location * entry = NULL; | |
dc810e39 | 768 | bfd_size_type amt = sizeof (* free_hi16s); |
435b1e90 | 769 | |
252b5132 RH |
770 | /* Find a free structure. */ |
771 | if (free_hi16s == NULL) | |
dc810e39 | 772 | free_hi16s = (hi16s_location *) bfd_zalloc (abfd, amt); |
252b5132 RH |
773 | |
774 | entry = free_hi16s; | |
775 | free_hi16s = free_hi16s->next; | |
435b1e90 | 776 | |
252b5132 RH |
777 | entry->addend = addend; |
778 | entry->address = address; | |
779 | entry->counter = hi16s_counter ++; | |
780 | entry->found = false; | |
781 | entry->next = previous_hi16s; | |
782 | previous_hi16s = entry; | |
435b1e90 | 783 | |
252b5132 RH |
784 | /* Cope with wrap around of our counter. */ |
785 | if (hi16s_counter == 0) | |
786 | { | |
787 | /* XXX - Assume that all counter entries differ only in their low 16 bits. */ | |
788 | for (entry = previous_hi16s; entry != NULL; entry = entry->next) | |
789 | entry->counter &= 0xffff; | |
790 | ||
791 | hi16s_counter = 0x10000; | |
792 | } | |
435b1e90 | 793 | |
252b5132 RH |
794 | return; |
795 | } | |
796 | ||
797 | static bfd_byte * | |
798 | find_remembered_hi16s_reloc (addend, already_found) | |
799 | bfd_vma addend; | |
800 | boolean * already_found; | |
801 | { | |
802 | hi16s_location * match = NULL; | |
803 | hi16s_location * entry; | |
804 | hi16s_location * previous = NULL; | |
805 | hi16s_location * prev; | |
252b5132 | 806 | bfd_byte * addr; |
435b1e90 | 807 | |
252b5132 RH |
808 | /* Search the table. Record the most recent entry that matches. */ |
809 | for (entry = previous_hi16s; entry; entry = entry->next) | |
810 | { | |
811 | if (entry->addend == addend | |
812 | && (match == NULL || match->counter < entry->counter)) | |
813 | { | |
814 | previous = prev; | |
815 | match = entry; | |
816 | } | |
435b1e90 | 817 | |
252b5132 RH |
818 | prev = entry; |
819 | } | |
820 | ||
821 | if (match == NULL) | |
822 | return NULL; | |
823 | ||
824 | /* Extract the address. */ | |
825 | addr = match->address; | |
826 | ||
827 | /* Remeber if this entry has already been used before. */ | |
828 | if (already_found) | |
829 | * already_found = match->found; | |
830 | ||
831 | /* Note that this entry has now been used. */ | |
832 | match->found = true; | |
435b1e90 | 833 | |
252b5132 | 834 | return addr; |
435b1e90 | 835 | } |
252b5132 RH |
836 | |
837 | /* FIXME: The code here probably ought to be removed and the code in reloc.c | |
838 | allowed to do its stuff instead. At least for most of the relocs, anwyay. */ | |
e12dd2ea | 839 | |
252b5132 RH |
840 | static bfd_reloc_status_type |
841 | v850_elf_perform_relocation (abfd, r_type, addend, address) | |
dc810e39 AM |
842 | bfd *abfd; |
843 | unsigned int r_type; | |
844 | bfd_vma addend; | |
845 | bfd_byte *address; | |
252b5132 RH |
846 | { |
847 | unsigned long insn; | |
848 | bfd_signed_vma saddend = (bfd_signed_vma) addend; | |
435b1e90 | 849 | |
252b5132 RH |
850 | switch (r_type) |
851 | { | |
852 | default: | |
853 | /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */ | |
854 | return bfd_reloc_notsupported; | |
435b1e90 | 855 | |
252b5132 RH |
856 | case R_V850_32: |
857 | bfd_put_32 (abfd, addend, address); | |
858 | return bfd_reloc_ok; | |
435b1e90 | 859 | |
252b5132 RH |
860 | case R_V850_22_PCREL: |
861 | if (saddend > 0x1fffff || saddend < -0x200000) | |
862 | return bfd_reloc_overflow; | |
435b1e90 | 863 | |
252b5132 RH |
864 | if ((addend % 2) != 0) |
865 | return bfd_reloc_dangerous; | |
435b1e90 | 866 | |
252b5132 RH |
867 | insn = bfd_get_32 (abfd, address); |
868 | insn &= ~0xfffe003f; | |
869 | insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16)); | |
dc810e39 | 870 | bfd_put_32 (abfd, (bfd_vma) insn, address); |
252b5132 | 871 | return bfd_reloc_ok; |
435b1e90 | 872 | |
252b5132 RH |
873 | case R_V850_9_PCREL: |
874 | if (saddend > 0xff || saddend < -0x100) | |
875 | return bfd_reloc_overflow; | |
435b1e90 | 876 | |
252b5132 RH |
877 | if ((addend % 2) != 0) |
878 | return bfd_reloc_dangerous; | |
435b1e90 | 879 | |
252b5132 RH |
880 | insn = bfd_get_16 (abfd, address); |
881 | insn &= ~ 0xf870; | |
882 | insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3); | |
883 | break; | |
435b1e90 | 884 | |
252b5132 RH |
885 | case R_V850_HI16: |
886 | addend += (bfd_get_16 (abfd, address) << 16); | |
887 | addend = (addend >> 16); | |
888 | insn = addend; | |
889 | break; | |
435b1e90 | 890 | |
252b5132 RH |
891 | case R_V850_HI16_S: |
892 | /* Remember where this relocation took place. */ | |
893 | remember_hi16s_reloc (abfd, addend, address); | |
894 | ||
895 | addend += (bfd_get_16 (abfd, address) << 16); | |
896 | addend = (addend >> 16) + ((addend & 0x8000) != 0); | |
435b1e90 KH |
897 | |
898 | /* This relocation cannot overflow. */ | |
252b5132 RH |
899 | if (addend > 0x7fff) |
900 | addend = 0; | |
435b1e90 | 901 | |
252b5132 RH |
902 | insn = addend; |
903 | break; | |
435b1e90 | 904 | |
252b5132 RH |
905 | case R_V850_LO16: |
906 | /* Calculate the sum of the value stored in the instruction and the | |
907 | addend and check for overflow from the low 16 bits into the high | |
908 | 16 bits. The assembler has already done some of this: If the | |
909 | value stored in the instruction has its 15th bit set, (counting | |
910 | from zero) then the assembler will have added 1 to the value | |
911 | stored in the associated HI16S reloc. So for example, these | |
912 | relocations: | |
913 | ||
914 | movhi hi( fred ), r0, r1 | |
915 | movea lo( fred ), r1, r1 | |
916 | ||
917 | will store 0 in the value fields for the MOVHI and MOVEA instructions | |
918 | and addend will be the address of fred, but for these instructions: | |
919 | ||
920 | movhi hi( fred + 0x123456), r0, r1 | |
921 | movea lo( fred + 0x123456), r1, r1 | |
922 | ||
923 | the value stored in the MOVHI instruction will be 0x12 and the value | |
924 | stored in the MOVEA instruction will be 0x3456. If however the | |
925 | instructions were: | |
926 | ||
927 | movhi hi( fred + 0x10ffff), r0, r1 | |
928 | movea lo( fred + 0x10ffff), r1, r1 | |
929 | ||
930 | then the value stored in the MOVHI instruction would be 0x11 (not | |
931 | 0x10) and the value stored in the MOVEA instruction would be 0xffff. | |
932 | Thus (assuming for the moment that the addend is 0), at run time the | |
933 | MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction | |
934 | adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if | |
935 | the instructions were: | |
936 | ||
937 | movhi hi( fred - 1), r0, r1 | |
938 | movea lo( fred - 1), r1, r1 | |
939 | ||
940 | then 0 is stored in the MOVHI instruction and -1 is stored in the | |
941 | MOVEA instruction. | |
942 | ||
943 | Overflow can occur if the addition of the value stored in the | |
944 | instruction plus the addend sets the 15th bit when before it was clear. | |
945 | This is because the 15th bit will be sign extended into the high part, | |
946 | thus reducing its value by one, but since the 15th bit was originally | |
947 | clear, the assembler will not have added 1 to the previous HI16S reloc | |
948 | to compensate for this effect. For example: | |
949 | ||
950 | movhi hi( fred + 0x123456), r0, r1 | |
951 | movea lo( fred + 0x123456), r1, r1 | |
952 | ||
953 | The value stored in HI16S reloc is 0x12, the value stored in the LO16 | |
954 | reloc is 0x3456. If we assume that the address of fred is 0x00007000 | |
955 | then the relocations become: | |
956 | ||
957 | HI16S: 0x0012 + (0x00007000 >> 16) = 0x12 | |
958 | LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456 | |
959 | ||
960 | but when the instructions are executed, the MOVEA instruction's value | |
961 | is signed extended, so the sum becomes: | |
962 | ||
963 | 0x00120000 | |
964 | + 0xffffa456 | |
965 | ------------ | |
966 | 0x0011a456 but 'fred + 0x123456' = 0x0012a456 | |
967 | ||
968 | Note that if the 15th bit was set in the value stored in the LO16 | |
969 | reloc, then we do not have to do anything: | |
970 | ||
971 | movhi hi( fred + 0x10ffff), r0, r1 | |
972 | movea lo( fred + 0x10ffff), r1, r1 | |
973 | ||
974 | HI16S: 0x0011 + (0x00007000 >> 16) = 0x11 | |
975 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff | |
976 | ||
977 | 0x00110000 | |
978 | + 0x00006fff | |
979 | ------------ | |
980 | 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff | |
981 | ||
252b5132 RH |
982 | Overflow can also occur if the computation carries into the 16th bit |
983 | and it also results in the 15th bit having the same value as the 15th | |
984 | bit of the original value. What happens is that the HI16S reloc | |
985 | will have already examined the 15th bit of the original value and | |
986 | added 1 to the high part if the bit is set. This compensates for the | |
987 | sign extension of 15th bit of the result of the computation. But now | |
988 | there is a carry into the 16th bit, and this has not been allowed for. | |
989 | ||
990 | So, for example if fred is at address 0xf000: | |
991 | ||
992 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] | |
993 | movea lo( fred + 0xffff), r1, r1 | |
994 | ||
995 | HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001 | |
996 | LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost) | |
997 | ||
998 | 0x00010000 | |
999 | + 0xffffefff | |
1000 | ------------ | |
1001 | 0x0000efff but 'fred + 0xffff' = 0x0001efff | |
1002 | ||
1003 | Similarly, if the 15th bit remains clear, but overflow occurs into | |
1004 | the 16th bit then (assuming the address of fred is 0xf000): | |
1005 | ||
1006 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] | |
1007 | movea lo( fred + 0x7000), r1, r1 | |
1008 | ||
1009 | HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000 | |
1010 | LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost) | |
1011 | ||
1012 | 0x00000000 | |
1013 | + 0x00006fff | |
1014 | ------------ | |
1015 | 0x00006fff but 'fred + 0x7000' = 0x00016fff | |
435b1e90 | 1016 | |
252b5132 RH |
1017 | Note - there is no need to change anything if a carry occurs, and the |
1018 | 15th bit changes its value from being set to being clear, as the HI16S | |
1019 | reloc will have already added in 1 to the high part for us: | |
1020 | ||
1021 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] | |
1022 | movea lo( fred + 0xffff), r1, r1 | |
1023 | ||
1024 | HI16S: 0x0001 + (0x00007000 >> 16) | |
1025 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost) | |
1026 | ||
1027 | 0x00010000 | |
1028 | + 0x00006fff (bit 15 not set, so the top half is zero) | |
1029 | ------------ | |
1030 | 0x00016fff which is right (assuming that fred is at 0x7000) | |
1031 | ||
1032 | but if the 15th bit goes from being clear to being set, then we must | |
1033 | once again handle overflow: | |
1034 | ||
1035 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] | |
1036 | movea lo( fred + 0x7000), r1, r1 | |
1037 | ||
1038 | HI16S: 0x0000 + (0x0000ffff >> 16) | |
1039 | LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16) | |
1040 | ||
1041 | 0x00000000 | |
1042 | + 0x00006fff (bit 15 not set, so the top half is zero) | |
1043 | ------------ | |
e12dd2ea | 1044 | 0x00006fff which is wrong (assuming that fred is at 0xffff). */ |
252b5132 RH |
1045 | { |
1046 | long result; | |
1047 | ||
1048 | insn = bfd_get_16 (abfd, address); | |
1049 | result = insn + addend; | |
1050 | ||
1051 | #define BIT15_SET(x) ((x) & 0x8000) | |
1052 | #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff) | |
435b1e90 | 1053 | |
252b5132 RH |
1054 | if ((BIT15_SET (result) && ! BIT15_SET (addend)) |
1055 | || (OVERFLOWS (addend, insn) | |
1056 | && ((! BIT15_SET (insn)) || (BIT15_SET (addend))))) | |
1057 | { | |
1058 | boolean already_updated; | |
1059 | bfd_byte * hi16s_address = find_remembered_hi16s_reloc | |
1060 | (addend, & already_updated); | |
435b1e90 | 1061 | |
252b5132 RH |
1062 | /* Amend the matching HI16_S relocation. */ |
1063 | if (hi16s_address != NULL) | |
1064 | { | |
1065 | if (! already_updated) | |
1066 | { | |
1067 | insn = bfd_get_16 (abfd, hi16s_address); | |
1068 | insn += 1; | |
dc810e39 | 1069 | bfd_put_16 (abfd, (bfd_vma) insn, hi16s_address); |
252b5132 RH |
1070 | } |
1071 | } | |
1072 | else | |
1073 | { | |
1074 | fprintf (stderr, _("FAILED to find previous HI16 reloc\n")); | |
1075 | return bfd_reloc_overflow; | |
1076 | } | |
1077 | } | |
435b1e90 | 1078 | |
252b5132 RH |
1079 | /* Do not complain if value has top bit set, as this has been anticipated. */ |
1080 | insn = result & 0xffff; | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | case R_V850_8: | |
1085 | addend += (char) bfd_get_8 (abfd, address); | |
1086 | ||
1087 | saddend = (bfd_signed_vma) addend; | |
435b1e90 | 1088 | |
252b5132 RH |
1089 | if (saddend > 0x7f || saddend < -0x80) |
1090 | return bfd_reloc_overflow; | |
1091 | ||
1092 | bfd_put_8 (abfd, addend, address); | |
1093 | return bfd_reloc_ok; | |
1094 | ||
1095 | case R_V850_CALLT_16_16_OFFSET: | |
1096 | addend += bfd_get_16 (abfd, address); | |
435b1e90 | 1097 | |
252b5132 | 1098 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1099 | |
252b5132 RH |
1100 | if (saddend > 0xffff || saddend < 0) |
1101 | return bfd_reloc_overflow; | |
1102 | ||
1103 | insn = addend; | |
1104 | break; | |
435b1e90 | 1105 | |
252b5132 RH |
1106 | case R_V850_16: |
1107 | ||
435b1e90 | 1108 | /* drop through */ |
252b5132 RH |
1109 | case R_V850_SDA_16_16_OFFSET: |
1110 | case R_V850_ZDA_16_16_OFFSET: | |
1111 | case R_V850_TDA_16_16_OFFSET: | |
1112 | addend += bfd_get_16 (abfd, address); | |
435b1e90 | 1113 | |
252b5132 | 1114 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1115 | |
252b5132 RH |
1116 | if (saddend > 0x7fff || saddend < -0x8000) |
1117 | return bfd_reloc_overflow; | |
1118 | ||
1119 | insn = addend; | |
1120 | break; | |
435b1e90 | 1121 | |
252b5132 RH |
1122 | case R_V850_SDA_15_16_OFFSET: |
1123 | case R_V850_ZDA_15_16_OFFSET: | |
1124 | insn = bfd_get_16 (abfd, address); | |
1125 | addend += (insn & 0xfffe); | |
435b1e90 | 1126 | |
252b5132 | 1127 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1128 | |
252b5132 RH |
1129 | if (saddend > 0x7ffe || saddend < -0x8000) |
1130 | return bfd_reloc_overflow; | |
435b1e90 | 1131 | |
252b5132 RH |
1132 | if (addend & 1) |
1133 | return bfd_reloc_dangerous; | |
435b1e90 | 1134 | |
dc810e39 | 1135 | insn = (addend &~ (bfd_vma) 1) | (insn & 1); |
252b5132 | 1136 | break; |
435b1e90 | 1137 | |
252b5132 RH |
1138 | case R_V850_TDA_6_8_OFFSET: |
1139 | insn = bfd_get_16 (abfd, address); | |
1140 | addend += ((insn & 0x7e) << 1); | |
435b1e90 | 1141 | |
252b5132 | 1142 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1143 | |
252b5132 RH |
1144 | if (saddend > 0xfc || saddend < 0) |
1145 | return bfd_reloc_overflow; | |
435b1e90 | 1146 | |
252b5132 RH |
1147 | if (addend & 3) |
1148 | return bfd_reloc_dangerous; | |
435b1e90 | 1149 | |
252b5132 RH |
1150 | insn &= 0xff81; |
1151 | insn |= (addend >> 1); | |
1152 | break; | |
435b1e90 | 1153 | |
252b5132 RH |
1154 | case R_V850_TDA_7_8_OFFSET: |
1155 | insn = bfd_get_16 (abfd, address); | |
1156 | addend += ((insn & 0x7f) << 1); | |
435b1e90 | 1157 | |
252b5132 | 1158 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1159 | |
252b5132 RH |
1160 | if (saddend > 0xfe || saddend < 0) |
1161 | return bfd_reloc_overflow; | |
435b1e90 | 1162 | |
252b5132 RH |
1163 | if (addend & 1) |
1164 | return bfd_reloc_dangerous; | |
435b1e90 | 1165 | |
252b5132 RH |
1166 | insn &= 0xff80; |
1167 | insn |= (addend >> 1); | |
1168 | break; | |
435b1e90 | 1169 | |
252b5132 RH |
1170 | case R_V850_TDA_7_7_OFFSET: |
1171 | insn = bfd_get_16 (abfd, address); | |
1172 | addend += insn & 0x7f; | |
435b1e90 | 1173 | |
252b5132 | 1174 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1175 | |
252b5132 RH |
1176 | if (saddend > 0x7f || saddend < 0) |
1177 | return bfd_reloc_overflow; | |
435b1e90 | 1178 | |
252b5132 RH |
1179 | insn &= 0xff80; |
1180 | insn |= addend; | |
1181 | break; | |
435b1e90 | 1182 | |
252b5132 RH |
1183 | case R_V850_TDA_4_5_OFFSET: |
1184 | insn = bfd_get_16 (abfd, address); | |
1185 | addend += ((insn & 0xf) << 1); | |
435b1e90 | 1186 | |
252b5132 | 1187 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1188 | |
252b5132 RH |
1189 | if (saddend > 0x1e || saddend < 0) |
1190 | return bfd_reloc_overflow; | |
435b1e90 | 1191 | |
252b5132 RH |
1192 | if (addend & 1) |
1193 | return bfd_reloc_dangerous; | |
435b1e90 | 1194 | |
252b5132 RH |
1195 | insn &= 0xfff0; |
1196 | insn |= (addend >> 1); | |
1197 | break; | |
435b1e90 | 1198 | |
252b5132 RH |
1199 | case R_V850_TDA_4_4_OFFSET: |
1200 | insn = bfd_get_16 (abfd, address); | |
1201 | addend += insn & 0xf; | |
435b1e90 | 1202 | |
252b5132 | 1203 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1204 | |
252b5132 RH |
1205 | if (saddend > 0xf || saddend < 0) |
1206 | return bfd_reloc_overflow; | |
435b1e90 | 1207 | |
252b5132 RH |
1208 | insn &= 0xfff0; |
1209 | insn |= addend; | |
1210 | break; | |
435b1e90 | 1211 | |
252b5132 RH |
1212 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
1213 | case R_V850_SDA_16_16_SPLIT_OFFSET: | |
1214 | insn = bfd_get_32 (abfd, address); | |
1215 | addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5); | |
435b1e90 | 1216 | |
252b5132 | 1217 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1218 | |
252b5132 RH |
1219 | if (saddend > 0x7fff || saddend < -0x8000) |
1220 | return bfd_reloc_overflow; | |
435b1e90 | 1221 | |
252b5132 RH |
1222 | insn &= 0x0001ffdf; |
1223 | insn |= (addend & 1) << 5; | |
dc810e39 | 1224 | insn |= (addend &~ (bfd_vma) 1) << 16; |
435b1e90 | 1225 | |
dc810e39 | 1226 | bfd_put_32 (abfd, (bfd_vma) insn, address); |
252b5132 | 1227 | return bfd_reloc_ok; |
435b1e90 | 1228 | |
252b5132 RH |
1229 | case R_V850_CALLT_6_7_OFFSET: |
1230 | insn = bfd_get_16 (abfd, address); | |
1231 | addend += ((insn & 0x3f) << 1); | |
435b1e90 | 1232 | |
252b5132 | 1233 | saddend = (bfd_signed_vma) addend; |
435b1e90 | 1234 | |
252b5132 RH |
1235 | if (saddend > 0x7e || saddend < 0) |
1236 | return bfd_reloc_overflow; | |
435b1e90 | 1237 | |
252b5132 RH |
1238 | if (addend & 1) |
1239 | return bfd_reloc_dangerous; | |
435b1e90 | 1240 | |
252b5132 RH |
1241 | insn &= 0xff80; |
1242 | insn |= (addend >> 1); | |
1243 | break; | |
1244 | ||
1245 | case R_V850_GNU_VTINHERIT: | |
1246 | case R_V850_GNU_VTENTRY: | |
1247 | return bfd_reloc_ok; | |
1248 | ||
1249 | } | |
1250 | ||
dc810e39 | 1251 | bfd_put_16 (abfd, (bfd_vma) insn, address); |
252b5132 RH |
1252 | return bfd_reloc_ok; |
1253 | } | |
252b5132 RH |
1254 | \f |
1255 | /* Insert the addend into the instruction. */ | |
e12dd2ea | 1256 | |
252b5132 RH |
1257 | static bfd_reloc_status_type |
1258 | v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err) | |
5f771d47 | 1259 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1260 | arelent * reloc; |
1261 | asymbol * symbol; | |
5f771d47 | 1262 | PTR data ATTRIBUTE_UNUSED; |
252b5132 RH |
1263 | asection * isection; |
1264 | bfd * obfd; | |
5f771d47 | 1265 | char ** err ATTRIBUTE_UNUSED; |
252b5132 RH |
1266 | { |
1267 | long relocation; | |
435b1e90 | 1268 | |
252b5132 RH |
1269 | /* If there is an output BFD, |
1270 | and the symbol is not a section name (which is only defined at final link time), | |
1271 | and either we are not putting the addend into the instruction | |
e12dd2ea | 1272 | or the addend is zero, so there is nothing to add into the instruction |
252b5132 RH |
1273 | then just fixup the address and return. */ |
1274 | if (obfd != (bfd *) NULL | |
1275 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1276 | && (! reloc->howto->partial_inplace | |
1277 | || reloc->addend == 0)) | |
1278 | { | |
1279 | reloc->address += isection->output_offset; | |
1280 | return bfd_reloc_ok; | |
1281 | } | |
435b1e90 | 1282 | #if 0 |
252b5132 | 1283 | else if (obfd != NULL) |
e12dd2ea | 1284 | return bfd_reloc_continue; |
252b5132 | 1285 | #endif |
435b1e90 | 1286 | |
252b5132 RH |
1287 | /* Catch relocs involving undefined symbols. */ |
1288 | if (bfd_is_und_section (symbol->section) | |
1289 | && (symbol->flags & BSF_WEAK) == 0 | |
1290 | && obfd == NULL) | |
1291 | return bfd_reloc_undefined; | |
1292 | ||
1293 | /* We handle final linking of some relocs ourselves. */ | |
1294 | ||
1295 | /* Is the address of the relocation really within the section? */ | |
1296 | if (reloc->address > isection->_cooked_size) | |
1297 | return bfd_reloc_outofrange; | |
435b1e90 | 1298 | |
252b5132 RH |
1299 | /* Work out which section the relocation is targetted at and the |
1300 | initial relocation command value. */ | |
435b1e90 | 1301 | |
252b5132 RH |
1302 | /* Get symbol value. (Common symbols are special.) */ |
1303 | if (bfd_is_com_section (symbol->section)) | |
1304 | relocation = 0; | |
1305 | else | |
1306 | relocation = symbol->value; | |
435b1e90 | 1307 | |
252b5132 RH |
1308 | /* Convert input-section-relative symbol value to absolute + addend. */ |
1309 | relocation += symbol->section->output_section->vma; | |
1310 | relocation += symbol->section->output_offset; | |
1311 | relocation += reloc->addend; | |
435b1e90 | 1312 | |
a0f2e916 NC |
1313 | #if 0 /* Since this reloc is going to be processed later on, we should |
1314 | not make it pc-relative here. To test this, try assembling and | |
1315 | linking this program: | |
1316 | ||
1317 | .text | |
1318 | .globl _start | |
1319 | nop | |
dc810e39 | 1320 | _start: |
a0f2e916 NC |
1321 | jr foo |
1322 | ||
1323 | .section ".foo","ax" | |
1324 | nop | |
1325 | foo: | |
e12dd2ea | 1326 | nop */ |
252b5132 RH |
1327 | if (reloc->howto->pc_relative == true) |
1328 | { | |
1329 | /* Here the variable relocation holds the final address of the | |
1330 | symbol we are relocating against, plus any addend. */ | |
1331 | relocation -= isection->output_section->vma + isection->output_offset; | |
435b1e90 | 1332 | |
e12dd2ea | 1333 | /* Deal with pcrel_offset. */ |
252b5132 RH |
1334 | relocation -= reloc->address; |
1335 | } | |
a0f2e916 | 1336 | #endif |
435b1e90 | 1337 | reloc->addend = relocation; |
252b5132 RH |
1338 | return bfd_reloc_ok; |
1339 | } | |
252b5132 | 1340 | \f |
252b5132 RH |
1341 | static boolean |
1342 | v850_elf_is_local_label_name (abfd, name) | |
5f771d47 | 1343 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1344 | const char * name; |
1345 | { | |
1346 | return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.')) | |
1347 | || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')); | |
1348 | } | |
252b5132 RH |
1349 | \f |
1350 | /* Perform a relocation as part of a final link. */ | |
e12dd2ea | 1351 | |
252b5132 RH |
1352 | static bfd_reloc_status_type |
1353 | v850_elf_final_link_relocate (howto, input_bfd, output_bfd, | |
1354 | input_section, contents, offset, value, | |
1355 | addend, info, sym_sec, is_local) | |
1356 | reloc_howto_type * howto; | |
1357 | bfd * input_bfd; | |
5f771d47 | 1358 | bfd * output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1359 | asection * input_section; |
1360 | bfd_byte * contents; | |
1361 | bfd_vma offset; | |
1362 | bfd_vma value; | |
1363 | bfd_vma addend; | |
1364 | struct bfd_link_info * info; | |
1365 | asection * sym_sec; | |
5f771d47 | 1366 | int is_local ATTRIBUTE_UNUSED; |
252b5132 | 1367 | { |
dc810e39 | 1368 | unsigned int r_type = howto->type; |
252b5132 RH |
1369 | bfd_byte * hit_data = contents + offset; |
1370 | ||
1371 | /* Adjust the value according to the relocation. */ | |
1372 | switch (r_type) | |
1373 | { | |
1374 | case R_V850_9_PCREL: | |
1375 | value -= (input_section->output_section->vma | |
1376 | + input_section->output_offset); | |
1377 | value -= offset; | |
1378 | break; | |
435b1e90 | 1379 | |
252b5132 RH |
1380 | case R_V850_22_PCREL: |
1381 | value -= (input_section->output_section->vma | |
1382 | + input_section->output_offset | |
1383 | + offset); | |
1384 | ||
232fb1a3 NC |
1385 | /* If the sign extension will corrupt the value then we have overflowed. */ |
1386 | if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000)) | |
1387 | return bfd_reloc_overflow; | |
435b1e90 | 1388 | |
e12dd2ea NC |
1389 | /* Only the bottom 24 bits of the PC are valid */ |
1390 | value = SEXT24 (value); | |
252b5132 | 1391 | break; |
435b1e90 | 1392 | |
252b5132 RH |
1393 | case R_V850_HI16_S: |
1394 | case R_V850_HI16: | |
1395 | case R_V850_LO16: | |
1396 | case R_V850_16: | |
1397 | case R_V850_32: | |
1398 | case R_V850_8: | |
1399 | break; | |
1400 | ||
435b1e90 | 1401 | case R_V850_ZDA_15_16_OFFSET: |
252b5132 RH |
1402 | case R_V850_ZDA_16_16_OFFSET: |
1403 | case R_V850_ZDA_16_16_SPLIT_OFFSET: | |
1404 | if (sym_sec == NULL) | |
1405 | return bfd_reloc_undefined; | |
435b1e90 | 1406 | |
252b5132 RH |
1407 | value -= sym_sec->output_section->vma; |
1408 | break; | |
1409 | ||
1410 | case R_V850_SDA_15_16_OFFSET: | |
1411 | case R_V850_SDA_16_16_OFFSET: | |
1412 | case R_V850_SDA_16_16_SPLIT_OFFSET: | |
1413 | { | |
1414 | unsigned long gp; | |
1415 | struct bfd_link_hash_entry * h; | |
1416 | ||
1417 | if (sym_sec == NULL) | |
1418 | return bfd_reloc_undefined; | |
435b1e90 | 1419 | |
252b5132 RH |
1420 | /* Get the value of __gp. */ |
1421 | h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true); | |
1422 | if (h == (struct bfd_link_hash_entry *) NULL | |
1423 | || h->type != bfd_link_hash_defined) | |
1424 | return bfd_reloc_other; | |
1425 | ||
1426 | gp = (h->u.def.value | |
1427 | + h->u.def.section->output_section->vma | |
1428 | + h->u.def.section->output_offset); | |
1429 | ||
1430 | value -= sym_sec->output_section->vma; | |
1431 | value -= (gp - sym_sec->output_section->vma); | |
1432 | } | |
1433 | break; | |
1434 | ||
1435 | case R_V850_TDA_4_4_OFFSET: | |
1436 | case R_V850_TDA_4_5_OFFSET: | |
1437 | case R_V850_TDA_16_16_OFFSET: | |
1438 | case R_V850_TDA_7_7_OFFSET: | |
1439 | case R_V850_TDA_7_8_OFFSET: | |
1440 | case R_V850_TDA_6_8_OFFSET: | |
1441 | { | |
1442 | unsigned long ep; | |
1443 | struct bfd_link_hash_entry * h; | |
435b1e90 | 1444 | |
252b5132 RH |
1445 | /* Get the value of __ep. */ |
1446 | h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true); | |
1447 | if (h == (struct bfd_link_hash_entry *) NULL | |
1448 | || h->type != bfd_link_hash_defined) | |
e12dd2ea NC |
1449 | /* Actually this indicates that __ep could not be found. */ |
1450 | return bfd_reloc_continue; | |
252b5132 RH |
1451 | |
1452 | ep = (h->u.def.value | |
1453 | + h->u.def.section->output_section->vma | |
1454 | + h->u.def.section->output_offset); | |
1455 | ||
1456 | value -= ep; | |
1457 | } | |
1458 | break; | |
435b1e90 | 1459 | |
252b5132 RH |
1460 | case R_V850_CALLT_6_7_OFFSET: |
1461 | { | |
1462 | unsigned long ctbp; | |
1463 | struct bfd_link_hash_entry * h; | |
435b1e90 | 1464 | |
252b5132 RH |
1465 | /* Get the value of __ctbp. */ |
1466 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); | |
1467 | if (h == (struct bfd_link_hash_entry *) NULL | |
1468 | || h->type != bfd_link_hash_defined) | |
e12dd2ea NC |
1469 | /* Actually this indicates that __ctbp could not be found. */ |
1470 | return bfd_reloc_dangerous + 1; | |
252b5132 RH |
1471 | |
1472 | ctbp = (h->u.def.value | |
1473 | + h->u.def.section->output_section->vma | |
1474 | + h->u.def.section->output_offset); | |
1475 | value -= ctbp; | |
1476 | } | |
1477 | break; | |
435b1e90 | 1478 | |
252b5132 RH |
1479 | case R_V850_CALLT_16_16_OFFSET: |
1480 | { | |
1481 | unsigned long ctbp; | |
1482 | struct bfd_link_hash_entry * h; | |
1483 | ||
1484 | if (sym_sec == NULL) | |
1485 | return bfd_reloc_undefined; | |
435b1e90 | 1486 | |
252b5132 RH |
1487 | /* Get the value of __ctbp. */ |
1488 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); | |
1489 | if (h == (struct bfd_link_hash_entry *) NULL | |
1490 | || h->type != bfd_link_hash_defined) | |
1491 | return (bfd_reloc_dangerous + 1); | |
1492 | ||
1493 | ctbp = (h->u.def.value | |
1494 | + h->u.def.section->output_section->vma | |
1495 | + h->u.def.section->output_offset); | |
1496 | ||
1497 | value -= sym_sec->output_section->vma; | |
1498 | value -= (ctbp - sym_sec->output_section->vma); | |
1499 | } | |
1500 | break; | |
435b1e90 | 1501 | |
252b5132 RH |
1502 | case R_V850_NONE: |
1503 | case R_V850_GNU_VTINHERIT: | |
1504 | case R_V850_GNU_VTENTRY: | |
1505 | return bfd_reloc_ok; | |
1506 | ||
1507 | default: | |
1508 | return bfd_reloc_notsupported; | |
1509 | } | |
1510 | ||
1511 | /* Perform the relocation. */ | |
435b1e90 | 1512 | return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data); |
252b5132 | 1513 | } |
252b5132 RH |
1514 | \f |
1515 | /* Relocate an V850 ELF section. */ | |
e12dd2ea | 1516 | |
252b5132 RH |
1517 | static boolean |
1518 | v850_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
1519 | contents, relocs, local_syms, local_sections) | |
1520 | bfd * output_bfd; | |
1521 | struct bfd_link_info * info; | |
1522 | bfd * input_bfd; | |
1523 | asection * input_section; | |
1524 | bfd_byte * contents; | |
1525 | Elf_Internal_Rela * relocs; | |
1526 | Elf_Internal_Sym * local_syms; | |
1527 | asection ** local_sections; | |
1528 | { | |
1529 | Elf_Internal_Shdr * symtab_hdr; | |
1530 | struct elf_link_hash_entry ** sym_hashes; | |
1531 | Elf_Internal_Rela * rel; | |
1532 | Elf_Internal_Rela * relend; | |
1533 | ||
1534 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1535 | sym_hashes = elf_sym_hashes (input_bfd); | |
1536 | ||
1537 | if (sym_hashes == NULL) | |
1538 | { | |
1539 | info->callbacks->warning | |
dc810e39 AM |
1540 | (info, "no hash table available", |
1541 | NULL, input_bfd, input_section, (bfd_vma) 0); | |
252b5132 RH |
1542 | |
1543 | return false; | |
1544 | } | |
435b1e90 | 1545 | |
252b5132 RH |
1546 | /* Reset the list of remembered HI16S relocs to empty. */ |
1547 | free_hi16s = previous_hi16s; | |
1548 | previous_hi16s = NULL; | |
1549 | hi16s_counter = 0; | |
435b1e90 | 1550 | |
252b5132 RH |
1551 | rel = relocs; |
1552 | relend = relocs + input_section->reloc_count; | |
1553 | for (; rel < relend; rel++) | |
1554 | { | |
1555 | int r_type; | |
1556 | reloc_howto_type * howto; | |
1557 | unsigned long r_symndx; | |
1558 | Elf_Internal_Sym * sym; | |
1559 | asection * sec; | |
1560 | struct elf_link_hash_entry * h; | |
1561 | bfd_vma relocation; | |
1562 | bfd_reloc_status_type r; | |
1563 | ||
1564 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1565 | r_type = ELF32_R_TYPE (rel->r_info); | |
1566 | ||
1567 | if (r_type == R_V850_GNU_VTENTRY | |
1568 | || r_type == R_V850_GNU_VTINHERIT) | |
1569 | continue; | |
1570 | ||
1571 | howto = v850_elf_howto_table + r_type; | |
1572 | ||
1573 | if (info->relocateable) | |
1574 | { | |
1575 | /* This is a relocateable link. We don't have to change | |
1576 | anything, unless the reloc is against a section symbol, | |
1577 | in which case we have to adjust according to where the | |
1578 | section symbol winds up in the output section. */ | |
1579 | if (r_symndx < symtab_hdr->sh_info) | |
1580 | { | |
1581 | sym = local_syms + r_symndx; | |
1582 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1583 | { | |
1584 | sec = local_sections[r_symndx]; | |
1585 | rel->r_addend += sec->output_offset + sym->st_value; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | continue; | |
1590 | } | |
1591 | ||
1592 | /* This is a final link. */ | |
1593 | h = NULL; | |
1594 | sym = NULL; | |
1595 | sec = NULL; | |
1596 | if (r_symndx < symtab_hdr->sh_info) | |
1597 | { | |
1598 | sym = local_syms + r_symndx; | |
1599 | sec = local_sections[r_symndx]; | |
1600 | relocation = (sec->output_section->vma | |
1601 | + sec->output_offset | |
1602 | + sym->st_value); | |
1603 | #if 0 | |
1604 | { | |
1605 | char * name; | |
e12dd2ea | 1606 | |
252b5132 RH |
1607 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name); |
1608 | name = (name == NULL) ? "<none>" : name; | |
e12dd2ea NC |
1609 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", |
1610 | sec->name, name, sym->st_name, | |
1611 | sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend); | |
252b5132 RH |
1612 | } |
1613 | #endif | |
1614 | } | |
1615 | else | |
1616 | { | |
1617 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
435b1e90 | 1618 | |
252b5132 RH |
1619 | while (h->root.type == bfd_link_hash_indirect |
1620 | || h->root.type == bfd_link_hash_warning) | |
1621 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
435b1e90 | 1622 | |
252b5132 RH |
1623 | if (h->root.type == bfd_link_hash_defined |
1624 | || h->root.type == bfd_link_hash_defweak) | |
1625 | { | |
1626 | sec = h->root.u.def.section; | |
1627 | relocation = (h->root.u.def.value | |
1628 | + sec->output_section->vma | |
1629 | + sec->output_offset); | |
1630 | #if 0 | |
e12dd2ea NC |
1631 | fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", |
1632 | sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation); | |
252b5132 RH |
1633 | #endif |
1634 | } | |
1635 | else if (h->root.type == bfd_link_hash_undefweak) | |
1636 | { | |
1637 | #if 0 | |
e12dd2ea NC |
1638 | fprintf (stderr, "undefined: sec: %s, name: %s\n", |
1639 | sec->name, h->root.root.string); | |
252b5132 RH |
1640 | #endif |
1641 | relocation = 0; | |
1642 | } | |
1643 | else | |
1644 | { | |
1645 | if (! ((*info->callbacks->undefined_symbol) | |
1646 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1647 | input_section, rel->r_offset, true))) |
252b5132 RH |
1648 | return false; |
1649 | #if 0 | |
e12dd2ea | 1650 | fprintf (stderr, "unknown: name: %s\n", h->root.root.string); |
252b5132 RH |
1651 | #endif |
1652 | relocation = 0; | |
1653 | } | |
1654 | } | |
1655 | ||
e12dd2ea | 1656 | /* FIXME: We should use the addend, but the COFF relocations don't. */ |
252b5132 RH |
1657 | r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd, |
1658 | input_section, | |
1659 | contents, rel->r_offset, | |
1660 | relocation, rel->r_addend, | |
1661 | info, sec, h == NULL); | |
1662 | ||
1663 | if (r != bfd_reloc_ok) | |
1664 | { | |
1665 | const char * name; | |
1666 | const char * msg = (const char *)0; | |
1667 | ||
1668 | if (h != NULL) | |
1669 | name = h->root.root.string; | |
1670 | else | |
1671 | { | |
1672 | name = (bfd_elf_string_from_elf_section | |
1673 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1674 | if (name == NULL || *name == '\0') | |
1675 | name = bfd_section_name (input_bfd, sec); | |
1676 | } | |
1677 | ||
1678 | switch (r) | |
1679 | { | |
1680 | case bfd_reloc_overflow: | |
1681 | if (! ((*info->callbacks->reloc_overflow) | |
1682 | (info, name, howto->name, (bfd_vma) 0, | |
1683 | input_bfd, input_section, rel->r_offset))) | |
1684 | return false; | |
1685 | break; | |
1686 | ||
1687 | case bfd_reloc_undefined: | |
1688 | if (! ((*info->callbacks->undefined_symbol) | |
1689 | (info, name, input_bfd, input_section, | |
5cc7c785 | 1690 | rel->r_offset, true))) |
252b5132 RH |
1691 | return false; |
1692 | break; | |
1693 | ||
1694 | case bfd_reloc_outofrange: | |
1695 | msg = _("internal error: out of range error"); | |
1696 | goto common_error; | |
1697 | ||
1698 | case bfd_reloc_notsupported: | |
1699 | msg = _("internal error: unsupported relocation error"); | |
1700 | goto common_error; | |
1701 | ||
1702 | case bfd_reloc_dangerous: | |
1703 | msg = _("internal error: dangerous relocation"); | |
1704 | goto common_error; | |
1705 | ||
1706 | case bfd_reloc_other: | |
1707 | msg = _("could not locate special linker symbol __gp"); | |
1708 | goto common_error; | |
1709 | ||
1710 | case bfd_reloc_continue: | |
1711 | msg = _("could not locate special linker symbol __ep"); | |
1712 | goto common_error; | |
1713 | ||
1714 | case (bfd_reloc_dangerous + 1): | |
1715 | msg = _("could not locate special linker symbol __ctbp"); | |
1716 | goto common_error; | |
435b1e90 | 1717 | |
252b5132 RH |
1718 | default: |
1719 | msg = _("internal error: unknown error"); | |
1720 | /* fall through */ | |
1721 | ||
1722 | common_error: | |
1723 | if (!((*info->callbacks->warning) | |
1724 | (info, msg, name, input_bfd, input_section, | |
1725 | rel->r_offset))) | |
1726 | return false; | |
1727 | break; | |
1728 | } | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | return true; | |
1733 | } | |
1734 | ||
1735 | static boolean | |
1736 | v850_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
1737 | bfd *abfd ATTRIBUTE_UNUSED; |
1738 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
1739 | asection *sec ATTRIBUTE_UNUSED; | |
1740 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 | 1741 | { |
e12dd2ea | 1742 | /* No got and plt entries for v850-elf. */ |
252b5132 RH |
1743 | return true; |
1744 | } | |
1745 | ||
1746 | static asection * | |
1747 | v850_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
1748 | bfd *abfd; | |
5f771d47 | 1749 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1750 | Elf_Internal_Rela *rel; |
1751 | struct elf_link_hash_entry *h; | |
1752 | Elf_Internal_Sym *sym; | |
1753 | { | |
1754 | if (h != NULL) | |
1755 | { | |
1756 | switch (ELF32_R_TYPE (rel->r_info)) | |
1757 | { | |
1758 | case R_V850_GNU_VTINHERIT: | |
1759 | case R_V850_GNU_VTENTRY: | |
1760 | break; | |
1761 | ||
1762 | default: | |
1763 | switch (h->root.type) | |
1764 | { | |
1765 | case bfd_link_hash_defined: | |
1766 | case bfd_link_hash_defweak: | |
1767 | return h->root.u.def.section; | |
1768 | ||
1769 | case bfd_link_hash_common: | |
1770 | return h->root.u.c.p->section; | |
e049a0de ILT |
1771 | |
1772 | default: | |
1773 | break; | |
252b5132 RH |
1774 | } |
1775 | } | |
1776 | } | |
1777 | else | |
1778 | { | |
1779 | if (!(elf_bad_symtab (abfd) | |
1780 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
1781 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
1782 | && sym->st_shndx != SHN_COMMON)) | |
1783 | { | |
1784 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
1785 | } | |
1786 | } | |
1787 | return NULL; | |
1788 | } | |
e12dd2ea | 1789 | |
252b5132 | 1790 | /* Set the right machine number. */ |
e12dd2ea | 1791 | |
252b5132 RH |
1792 | static boolean |
1793 | v850_elf_object_p (abfd) | |
1794 | bfd *abfd; | |
1795 | { | |
1796 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) | |
1797 | { | |
1798 | default: | |
1799 | case E_V850_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, 0); break; | |
1800 | case E_V850E_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e); break; | |
1801 | case E_V850EA_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850ea); break; | |
1802 | } | |
1803 | return true; | |
1804 | } | |
1805 | ||
1806 | /* Store the machine number in the flags field. */ | |
e12dd2ea | 1807 | |
252b5132 RH |
1808 | static void |
1809 | v850_elf_final_write_processing (abfd, linker) | |
1810 | bfd * abfd; | |
5f771d47 | 1811 | boolean linker ATTRIBUTE_UNUSED; |
252b5132 RH |
1812 | { |
1813 | unsigned long val; | |
1814 | ||
1815 | switch (bfd_get_mach (abfd)) | |
1816 | { | |
1817 | default: | |
1818 | case 0: val = E_V850_ARCH; break; | |
1819 | case bfd_mach_v850e: val = E_V850E_ARCH; break; | |
1820 | case bfd_mach_v850ea: val = E_V850EA_ARCH; break; | |
1821 | } | |
1822 | ||
1823 | elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH; | |
1824 | elf_elfheader (abfd)->e_flags |= val; | |
1825 | } | |
1826 | ||
435b1e90 | 1827 | /* Function to keep V850 specific file flags. */ |
e12dd2ea | 1828 | |
252b5132 RH |
1829 | static boolean |
1830 | v850_elf_set_private_flags (abfd, flags) | |
1831 | bfd * abfd; | |
1832 | flagword flags; | |
1833 | { | |
1834 | BFD_ASSERT (!elf_flags_init (abfd) | |
1835 | || elf_elfheader (abfd)->e_flags == flags); | |
1836 | ||
1837 | elf_elfheader (abfd)->e_flags = flags; | |
1838 | elf_flags_init (abfd) = true; | |
1839 | return true; | |
1840 | } | |
1841 | ||
e12dd2ea NC |
1842 | /* Copy backend specific data from one object module to another. */ |
1843 | ||
252b5132 RH |
1844 | static boolean |
1845 | v850_elf_copy_private_bfd_data (ibfd, obfd) | |
1846 | bfd * ibfd; | |
1847 | bfd * obfd; | |
1848 | { | |
1849 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1850 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1851 | return true; | |
1852 | ||
1853 | BFD_ASSERT (!elf_flags_init (obfd) | |
1854 | || (elf_elfheader (obfd)->e_flags | |
1855 | == elf_elfheader (ibfd)->e_flags)); | |
1856 | ||
1857 | elf_gp (obfd) = elf_gp (ibfd); | |
1858 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
1859 | elf_flags_init (obfd) = true; | |
e12dd2ea | 1860 | |
252b5132 RH |
1861 | return true; |
1862 | } | |
1863 | ||
e12dd2ea NC |
1864 | /* Merge backend specific data from an object file |
1865 | to the output object file when linking. */ | |
252b5132 RH |
1866 | static boolean |
1867 | v850_elf_merge_private_bfd_data (ibfd, obfd) | |
1868 | bfd * ibfd; | |
1869 | bfd * obfd; | |
1870 | { | |
1871 | flagword out_flags; | |
1872 | flagword in_flags; | |
1873 | ||
1874 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1875 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1876 | return true; | |
1877 | ||
1878 | in_flags = elf_elfheader (ibfd)->e_flags; | |
1879 | out_flags = elf_elfheader (obfd)->e_flags; | |
1880 | ||
1881 | if (! elf_flags_init (obfd)) | |
1882 | { | |
1883 | /* If the input is the default architecture then do not | |
1884 | bother setting the flags for the output architecture, | |
1885 | instead allow future merges to do this. If no future | |
1886 | merges ever set these flags then they will retain their | |
1887 | unitialised values, which surprise surprise, correspond | |
1888 | to the default values. */ | |
1889 | if (bfd_get_arch_info (ibfd)->the_default) | |
1890 | return true; | |
435b1e90 | 1891 | |
252b5132 RH |
1892 | elf_flags_init (obfd) = true; |
1893 | elf_elfheader (obfd)->e_flags = in_flags; | |
1894 | ||
1895 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1896 | && bfd_get_arch_info (obfd)->the_default) | |
e12dd2ea | 1897 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
252b5132 RH |
1898 | |
1899 | return true; | |
1900 | } | |
1901 | ||
1902 | /* Check flag compatibility. */ | |
1903 | if (in_flags == out_flags) | |
1904 | return true; | |
1905 | ||
1906 | if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH) | |
1907 | && (in_flags & EF_V850_ARCH) != E_V850_ARCH) | |
1908 | _bfd_error_handler (_("%s: Architecture mismatch with previous modules"), | |
1909 | bfd_get_filename (ibfd)); | |
1910 | ||
1911 | return true; | |
1912 | } | |
e12dd2ea NC |
1913 | |
1914 | /* Display the flags field. */ | |
252b5132 RH |
1915 | |
1916 | static boolean | |
1917 | v850_elf_print_private_bfd_data (abfd, ptr) | |
1918 | bfd * abfd; | |
1919 | PTR ptr; | |
1920 | { | |
1921 | FILE * file = (FILE *) ptr; | |
435b1e90 | 1922 | |
252b5132 | 1923 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
435b1e90 | 1924 | |
252b5132 | 1925 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
435b1e90 | 1926 | |
252b5132 RH |
1927 | /* xgettext:c-format */ |
1928 | fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags); | |
435b1e90 | 1929 | |
252b5132 RH |
1930 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) |
1931 | { | |
1932 | default: | |
1933 | case E_V850_ARCH: fprintf (file, _("v850 architecture")); break; | |
1934 | case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break; | |
1935 | case E_V850EA_ARCH: fprintf (file, _("v850ea architecture")); break; | |
1936 | } | |
435b1e90 | 1937 | |
252b5132 | 1938 | fputc ('\n', file); |
435b1e90 | 1939 | |
252b5132 RH |
1940 | return true; |
1941 | } | |
1942 | ||
1943 | /* V850 ELF uses four common sections. One is the usual one, and the | |
1944 | others are for (small) objects in one of the special data areas: | |
1945 | small, tiny and zero. All the objects are kept together, and then | |
1946 | referenced via the gp register, the ep register or the r0 register | |
1947 | respectively, which yields smaller, faster assembler code. This | |
1948 | approach is copied from elf32-mips.c. */ | |
1949 | ||
1950 | static asection v850_elf_scom_section; | |
1951 | static asymbol v850_elf_scom_symbol; | |
1952 | static asymbol * v850_elf_scom_symbol_ptr; | |
1953 | static asection v850_elf_tcom_section; | |
1954 | static asymbol v850_elf_tcom_symbol; | |
1955 | static asymbol * v850_elf_tcom_symbol_ptr; | |
1956 | static asection v850_elf_zcom_section; | |
1957 | static asymbol v850_elf_zcom_symbol; | |
1958 | static asymbol * v850_elf_zcom_symbol_ptr; | |
1959 | ||
e12dd2ea NC |
1960 | /* Given a BFD section, try to locate the |
1961 | corresponding ELF section index. */ | |
252b5132 RH |
1962 | |
1963 | static boolean | |
1964 | v850_elf_section_from_bfd_section (abfd, hdr, sec, retval) | |
5f771d47 ILT |
1965 | bfd * abfd ATTRIBUTE_UNUSED; |
1966 | Elf32_Internal_Shdr * hdr ATTRIBUTE_UNUSED; | |
252b5132 RH |
1967 | asection * sec; |
1968 | int * retval; | |
1969 | { | |
1970 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) | |
1971 | *retval = SHN_V850_SCOMMON; | |
1972 | else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0) | |
1973 | *retval = SHN_V850_TCOMMON; | |
1974 | else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0) | |
1975 | *retval = SHN_V850_ZCOMMON; | |
1976 | else | |
1977 | return false; | |
435b1e90 | 1978 | |
252b5132 RH |
1979 | return true; |
1980 | } | |
1981 | ||
1982 | /* Handle the special V850 section numbers that a symbol may use. */ | |
1983 | ||
1984 | static void | |
1985 | v850_elf_symbol_processing (abfd, asym) | |
1986 | bfd * abfd; | |
1987 | asymbol * asym; | |
1988 | { | |
1989 | elf_symbol_type * elfsym = (elf_symbol_type *) asym; | |
1990 | unsigned short index; | |
435b1e90 | 1991 | |
252b5132 RH |
1992 | index = elfsym->internal_elf_sym.st_shndx; |
1993 | ||
1994 | /* If the section index is an "ordinary" index, then it may | |
1995 | refer to a v850 specific section created by the assembler. | |
1996 | Check the section's type and change the index it matches. | |
435b1e90 | 1997 | |
252b5132 | 1998 | FIXME: Should we alter the st_shndx field as well ? */ |
435b1e90 | 1999 | |
252b5132 RH |
2000 | if (index < elf_elfheader(abfd)[0].e_shnum) |
2001 | switch (elf_elfsections(abfd)[index]->sh_type) | |
2002 | { | |
2003 | case SHT_V850_SCOMMON: | |
2004 | index = SHN_V850_SCOMMON; | |
2005 | break; | |
435b1e90 | 2006 | |
252b5132 RH |
2007 | case SHT_V850_TCOMMON: |
2008 | index = SHN_V850_TCOMMON; | |
2009 | break; | |
435b1e90 | 2010 | |
252b5132 RH |
2011 | case SHT_V850_ZCOMMON: |
2012 | index = SHN_V850_ZCOMMON; | |
2013 | break; | |
435b1e90 | 2014 | |
252b5132 RH |
2015 | default: |
2016 | break; | |
2017 | } | |
435b1e90 | 2018 | |
252b5132 RH |
2019 | switch (index) |
2020 | { | |
2021 | case SHN_V850_SCOMMON: | |
2022 | if (v850_elf_scom_section.name == NULL) | |
2023 | { | |
2024 | /* Initialize the small common section. */ | |
2025 | v850_elf_scom_section.name = ".scommon"; | |
2026 | v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA; | |
2027 | v850_elf_scom_section.output_section = & v850_elf_scom_section; | |
2028 | v850_elf_scom_section.symbol = & v850_elf_scom_symbol; | |
2029 | v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr; | |
2030 | v850_elf_scom_symbol.name = ".scommon"; | |
2031 | v850_elf_scom_symbol.flags = BSF_SECTION_SYM; | |
2032 | v850_elf_scom_symbol.section = & v850_elf_scom_section; | |
2033 | v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol; | |
2034 | } | |
2035 | asym->section = & v850_elf_scom_section; | |
2036 | asym->value = elfsym->internal_elf_sym.st_size; | |
2037 | break; | |
435b1e90 | 2038 | |
252b5132 RH |
2039 | case SHN_V850_TCOMMON: |
2040 | if (v850_elf_tcom_section.name == NULL) | |
2041 | { | |
2042 | /* Initialize the tcommon section. */ | |
2043 | v850_elf_tcom_section.name = ".tcommon"; | |
2044 | v850_elf_tcom_section.flags = SEC_IS_COMMON; | |
2045 | v850_elf_tcom_section.output_section = & v850_elf_tcom_section; | |
2046 | v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol; | |
2047 | v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr; | |
2048 | v850_elf_tcom_symbol.name = ".tcommon"; | |
2049 | v850_elf_tcom_symbol.flags = BSF_SECTION_SYM; | |
2050 | v850_elf_tcom_symbol.section = & v850_elf_tcom_section; | |
2051 | v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol; | |
2052 | } | |
2053 | asym->section = & v850_elf_tcom_section; | |
2054 | asym->value = elfsym->internal_elf_sym.st_size; | |
2055 | break; | |
2056 | ||
2057 | case SHN_V850_ZCOMMON: | |
2058 | if (v850_elf_zcom_section.name == NULL) | |
2059 | { | |
2060 | /* Initialize the zcommon section. */ | |
2061 | v850_elf_zcom_section.name = ".zcommon"; | |
2062 | v850_elf_zcom_section.flags = SEC_IS_COMMON; | |
2063 | v850_elf_zcom_section.output_section = & v850_elf_zcom_section; | |
2064 | v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol; | |
2065 | v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr; | |
2066 | v850_elf_zcom_symbol.name = ".zcommon"; | |
2067 | v850_elf_zcom_symbol.flags = BSF_SECTION_SYM; | |
2068 | v850_elf_zcom_symbol.section = & v850_elf_zcom_section; | |
2069 | v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol; | |
2070 | } | |
2071 | asym->section = & v850_elf_zcom_section; | |
2072 | asym->value = elfsym->internal_elf_sym.st_size; | |
2073 | break; | |
2074 | } | |
2075 | } | |
2076 | ||
2077 | /* Hook called by the linker routine which adds symbols from an object | |
2078 | file. We must handle the special v850 section numbers here. */ | |
2079 | ||
252b5132 RH |
2080 | static boolean |
2081 | v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
2082 | bfd * abfd; | |
5f771d47 | 2083 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
252b5132 | 2084 | const Elf_Internal_Sym * sym; |
5f771d47 ILT |
2085 | const char ** namep ATTRIBUTE_UNUSED; |
2086 | flagword * flagsp ATTRIBUTE_UNUSED; | |
252b5132 RH |
2087 | asection ** secp; |
2088 | bfd_vma * valp; | |
2089 | { | |
2090 | int index = sym->st_shndx; | |
435b1e90 | 2091 | |
252b5132 RH |
2092 | /* If the section index is an "ordinary" index, then it may |
2093 | refer to a v850 specific section created by the assembler. | |
2094 | Check the section's type and change the index it matches. | |
435b1e90 | 2095 | |
252b5132 | 2096 | FIXME: Should we alter the st_shndx field as well ? */ |
435b1e90 | 2097 | |
252b5132 RH |
2098 | if (index < elf_elfheader(abfd)[0].e_shnum) |
2099 | switch (elf_elfsections(abfd)[index]->sh_type) | |
2100 | { | |
2101 | case SHT_V850_SCOMMON: | |
2102 | index = SHN_V850_SCOMMON; | |
2103 | break; | |
435b1e90 | 2104 | |
252b5132 RH |
2105 | case SHT_V850_TCOMMON: |
2106 | index = SHN_V850_TCOMMON; | |
2107 | break; | |
435b1e90 | 2108 | |
252b5132 RH |
2109 | case SHT_V850_ZCOMMON: |
2110 | index = SHN_V850_ZCOMMON; | |
2111 | break; | |
435b1e90 | 2112 | |
252b5132 RH |
2113 | default: |
2114 | break; | |
2115 | } | |
435b1e90 | 2116 | |
252b5132 RH |
2117 | switch (index) |
2118 | { | |
2119 | case SHN_V850_SCOMMON: | |
2120 | *secp = bfd_make_section_old_way (abfd, ".scommon"); | |
2121 | (*secp)->flags |= SEC_IS_COMMON; | |
2122 | *valp = sym->st_size; | |
2123 | break; | |
435b1e90 | 2124 | |
252b5132 RH |
2125 | case SHN_V850_TCOMMON: |
2126 | *secp = bfd_make_section_old_way (abfd, ".tcommon"); | |
2127 | (*secp)->flags |= SEC_IS_COMMON; | |
2128 | *valp = sym->st_size; | |
2129 | break; | |
435b1e90 | 2130 | |
252b5132 RH |
2131 | case SHN_V850_ZCOMMON: |
2132 | *secp = bfd_make_section_old_way (abfd, ".zcommon"); | |
2133 | (*secp)->flags |= SEC_IS_COMMON; | |
2134 | *valp = sym->st_size; | |
2135 | break; | |
2136 | } | |
2137 | ||
2138 | return true; | |
2139 | } | |
2140 | ||
252b5132 RH |
2141 | static boolean |
2142 | v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec) | |
5f771d47 ILT |
2143 | bfd * abfd ATTRIBUTE_UNUSED; |
2144 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
2145 | const char * name ATTRIBUTE_UNUSED; | |
252b5132 RH |
2146 | Elf_Internal_Sym * sym; |
2147 | asection * input_sec; | |
2148 | { | |
2149 | /* If we see a common symbol, which implies a relocatable link, then | |
2150 | if a symbol was in a special common section in an input file, mark | |
2151 | it as a special common in the output file. */ | |
435b1e90 | 2152 | |
252b5132 RH |
2153 | if (sym->st_shndx == SHN_COMMON) |
2154 | { | |
2155 | if (strcmp (input_sec->name, ".scommon") == 0) | |
2156 | sym->st_shndx = SHN_V850_SCOMMON; | |
2157 | else if (strcmp (input_sec->name, ".tcommon") == 0) | |
2158 | sym->st_shndx = SHN_V850_TCOMMON; | |
2159 | else if (strcmp (input_sec->name, ".zcommon") == 0) | |
2160 | sym->st_shndx = SHN_V850_ZCOMMON; | |
2161 | } | |
2162 | ||
2163 | return true; | |
2164 | } | |
2165 | ||
2166 | static boolean | |
2167 | v850_elf_section_from_shdr (abfd, hdr, name) | |
2168 | bfd * abfd; | |
2169 | Elf_Internal_Shdr * hdr; | |
2170 | char * name; | |
2171 | { | |
2172 | /* There ought to be a place to keep ELF backend specific flags, but | |
2173 | at the moment there isn't one. We just keep track of the | |
2174 | sections by their name, instead. */ | |
2175 | ||
2176 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
2177 | return false; | |
2178 | ||
2179 | switch (hdr->sh_type) | |
2180 | { | |
2181 | case SHT_V850_SCOMMON: | |
2182 | case SHT_V850_TCOMMON: | |
2183 | case SHT_V850_ZCOMMON: | |
2184 | if (! bfd_set_section_flags (abfd, hdr->bfd_section, | |
2185 | (bfd_get_section_flags (abfd, | |
2186 | hdr->bfd_section) | |
2187 | | SEC_IS_COMMON))) | |
2188 | return false; | |
2189 | } | |
2190 | ||
2191 | return true; | |
2192 | } | |
2193 | ||
e12dd2ea NC |
2194 | /* Set the correct type for a V850 ELF section. We do this |
2195 | by the section name, which is a hack, but ought to work. */ | |
2196 | ||
252b5132 RH |
2197 | static boolean |
2198 | v850_elf_fake_sections (abfd, hdr, sec) | |
5f771d47 | 2199 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2200 | Elf32_Internal_Shdr * hdr; |
2201 | asection * sec; | |
2202 | { | |
2203 | register const char * name; | |
2204 | ||
2205 | name = bfd_get_section_name (abfd, sec); | |
2206 | ||
2207 | if (strcmp (name, ".scommon") == 0) | |
2208 | { | |
2209 | hdr->sh_type = SHT_V850_SCOMMON; | |
2210 | } | |
2211 | else if (strcmp (name, ".tcommon") == 0) | |
2212 | { | |
2213 | hdr->sh_type = SHT_V850_TCOMMON; | |
2214 | } | |
2215 | else if (strcmp (name, ".zcommon") == 0) | |
2216 | hdr->sh_type = SHT_V850_ZCOMMON; | |
435b1e90 | 2217 | |
252b5132 RH |
2218 | return true; |
2219 | } | |
252b5132 RH |
2220 | \f |
2221 | #define TARGET_LITTLE_SYM bfd_elf32_v850_vec | |
2222 | #define TARGET_LITTLE_NAME "elf32-v850" | |
2223 | #define ELF_ARCH bfd_arch_v850 | |
aa4f99bb AO |
2224 | #define ELF_MACHINE_CODE EM_V850 |
2225 | #define ELF_MACHINE_ALT1 EM_CYGNUS_V850 | |
252b5132 | 2226 | #define ELF_MAXPAGESIZE 0x1000 |
435b1e90 | 2227 | |
252b5132 RH |
2228 | #define elf_info_to_howto v850_elf_info_to_howto_rela |
2229 | #define elf_info_to_howto_rel v850_elf_info_to_howto_rel | |
2230 | ||
2231 | #define elf_backend_check_relocs v850_elf_check_relocs | |
2232 | #define elf_backend_relocate_section v850_elf_relocate_section | |
2233 | #define elf_backend_object_p v850_elf_object_p | |
2234 | #define elf_backend_final_write_processing v850_elf_final_write_processing | |
2235 | #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section | |
2236 | #define elf_backend_symbol_processing v850_elf_symbol_processing | |
2237 | #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook | |
2238 | #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook | |
2239 | #define elf_backend_section_from_shdr v850_elf_section_from_shdr | |
2240 | #define elf_backend_fake_sections v850_elf_fake_sections | |
2241 | #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook | |
2242 | #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook | |
2243 | ||
2244 | #define elf_backend_can_gc_sections 1 | |
2245 | ||
252b5132 RH |
2246 | #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name |
2247 | #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup | |
2248 | #define bfd_elf32_bfd_copy_private_bfd_data v850_elf_copy_private_bfd_data | |
2249 | #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data | |
2250 | #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags | |
2251 | #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data | |
2252 | ||
2253 | #define elf_symbol_leading_char '_' | |
2254 | ||
2255 | #include "elf32-target.h" |