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1 | /* BFD back-end for Renesas H8/300 ELF binaries. | |
2 | Copyright (C) 1993-2017 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 3 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., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | #include "sysdep.h" | |
22 | #include "bfd.h" | |
23 | #include "libbfd.h" | |
24 | #include "elf-bfd.h" | |
25 | #include "elf/h8.h" | |
26 | ||
27 | static reloc_howto_type *elf32_h8_reloc_type_lookup | |
28 | (bfd *abfd, bfd_reloc_code_real_type code); | |
29 | static void elf32_h8_info_to_howto | |
30 | (bfd *, arelent *, Elf_Internal_Rela *); | |
31 | static void elf32_h8_info_to_howto_rel | |
32 | (bfd *, arelent *, Elf_Internal_Rela *); | |
33 | static unsigned long elf32_h8_mach (flagword); | |
34 | static void elf32_h8_final_write_processing (bfd *, bfd_boolean); | |
35 | static bfd_boolean elf32_h8_object_p (bfd *); | |
36 | static bfd_boolean elf32_h8_merge_private_bfd_data | |
37 | (bfd *, struct bfd_link_info *); | |
38 | static bfd_boolean elf32_h8_relax_section | |
39 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); | |
40 | static bfd_boolean elf32_h8_relax_delete_bytes | |
41 | (bfd *, asection *, bfd_vma, int); | |
42 | static bfd_boolean elf32_h8_symbol_address_p (bfd *, asection *, bfd_vma); | |
43 | static bfd_byte *elf32_h8_get_relocated_section_contents | |
44 | (bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
45 | bfd_byte *, bfd_boolean, asymbol **); | |
46 | static bfd_reloc_status_type elf32_h8_final_link_relocate | |
47 | (unsigned long, bfd *, bfd *, asection *, | |
48 | bfd_byte *, bfd_vma, bfd_vma, bfd_vma, | |
49 | struct bfd_link_info *, asection *, int); | |
50 | static bfd_boolean elf32_h8_relocate_section | |
51 | (bfd *, struct bfd_link_info *, bfd *, asection *, | |
52 | bfd_byte *, Elf_Internal_Rela *, | |
53 | Elf_Internal_Sym *, asection **); | |
54 | static bfd_reloc_status_type special | |
55 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
56 | ||
57 | /* This does not include any relocation information, but should be | |
58 | good enough for GDB or objdump to read the file. */ | |
59 | ||
60 | static reloc_howto_type h8_elf_howto_table[] = | |
61 | { | |
62 | #define R_H8_NONE_X 0 | |
63 | HOWTO (R_H8_NONE, /* type */ | |
64 | 0, /* rightshift */ | |
65 | 3, /* size (0 = byte, 1 = short, 2 = long) */ | |
66 | 0, /* bitsize */ | |
67 | FALSE, /* pc_relative */ | |
68 | 0, /* bitpos */ | |
69 | complain_overflow_dont,/* complain_on_overflow */ | |
70 | special, /* special_function */ | |
71 | "R_H8_NONE", /* name */ | |
72 | FALSE, /* partial_inplace */ | |
73 | 0, /* src_mask */ | |
74 | 0, /* dst_mask */ | |
75 | FALSE), /* pcrel_offset */ | |
76 | #define R_H8_DIR32_X (R_H8_NONE_X + 1) | |
77 | HOWTO (R_H8_DIR32, /* type */ | |
78 | 0, /* rightshift */ | |
79 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
80 | 32, /* bitsize */ | |
81 | FALSE, /* pc_relative */ | |
82 | 0, /* bitpos */ | |
83 | complain_overflow_dont,/* complain_on_overflow */ | |
84 | special, /* special_function */ | |
85 | "R_H8_DIR32", /* name */ | |
86 | FALSE, /* partial_inplace */ | |
87 | 0, /* src_mask */ | |
88 | 0xffffffff, /* dst_mask */ | |
89 | FALSE), /* pcrel_offset */ | |
90 | #define R_H8_DIR16_X (R_H8_DIR32_X + 1) | |
91 | HOWTO (R_H8_DIR16, /* type */ | |
92 | 0, /* rightshift */ | |
93 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
94 | 16, /* bitsize */ | |
95 | FALSE, /* pc_relative */ | |
96 | 0, /* bitpos */ | |
97 | complain_overflow_dont,/* complain_on_overflow */ | |
98 | special, /* special_function */ | |
99 | "R_H8_DIR16", /* name */ | |
100 | FALSE, /* partial_inplace */ | |
101 | 0, /* src_mask */ | |
102 | 0x0000ffff, /* dst_mask */ | |
103 | FALSE), /* pcrel_offset */ | |
104 | #define R_H8_DIR8_X (R_H8_DIR16_X + 1) | |
105 | HOWTO (R_H8_DIR8, /* type */ | |
106 | 0, /* rightshift */ | |
107 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
108 | 8, /* bitsize */ | |
109 | FALSE, /* pc_relative */ | |
110 | 0, /* bitpos */ | |
111 | complain_overflow_dont,/* complain_on_overflow */ | |
112 | special, /* special_function */ | |
113 | "R_H8_DIR8", /* name */ | |
114 | FALSE, /* partial_inplace */ | |
115 | 0, /* src_mask */ | |
116 | 0x000000ff, /* dst_mask */ | |
117 | FALSE), /* pcrel_offset */ | |
118 | #define R_H8_DIR16A8_X (R_H8_DIR8_X + 1) | |
119 | HOWTO (R_H8_DIR16A8, /* type */ | |
120 | 0, /* rightshift */ | |
121 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
122 | 16, /* bitsize */ | |
123 | FALSE, /* pc_relative */ | |
124 | 0, /* bitpos */ | |
125 | complain_overflow_bitfield, /* complain_on_overflow */ | |
126 | special, /* special_function */ | |
127 | "R_H8_DIR16A8", /* name */ | |
128 | FALSE, /* partial_inplace */ | |
129 | 0, /* src_mask */ | |
130 | 0x0000ffff, /* dst_mask */ | |
131 | FALSE), /* pcrel_offset */ | |
132 | #define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1) | |
133 | HOWTO (R_H8_DIR16R8, /* type */ | |
134 | 0, /* rightshift */ | |
135 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
136 | 16, /* bitsize */ | |
137 | FALSE, /* pc_relative */ | |
138 | 0, /* bitpos */ | |
139 | complain_overflow_bitfield, /* complain_on_overflow */ | |
140 | special, /* special_function */ | |
141 | "R_H8_DIR16R8", /* name */ | |
142 | FALSE, /* partial_inplace */ | |
143 | 0, /* src_mask */ | |
144 | 0x0000ffff, /* dst_mask */ | |
145 | FALSE), /* pcrel_offset */ | |
146 | #define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1) | |
147 | HOWTO (R_H8_DIR24A8, /* type */ | |
148 | 0, /* rightshift */ | |
149 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
150 | 24, /* bitsize */ | |
151 | FALSE, /* pc_relative */ | |
152 | 0, /* bitpos */ | |
153 | complain_overflow_bitfield, /* complain_on_overflow */ | |
154 | special, /* special_function */ | |
155 | "R_H8_DIR24A8", /* name */ | |
156 | TRUE, /* partial_inplace */ | |
157 | 0xff000000, /* src_mask */ | |
158 | 0x00ffffff, /* dst_mask */ | |
159 | FALSE), /* pcrel_offset */ | |
160 | #define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1) | |
161 | HOWTO (R_H8_DIR24R8, /* type */ | |
162 | 0, /* rightshift */ | |
163 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
164 | 24, /* bitsize */ | |
165 | FALSE, /* pc_relative */ | |
166 | 0, /* bitpos */ | |
167 | complain_overflow_bitfield, /* complain_on_overflow */ | |
168 | special, /* special_function */ | |
169 | "R_H8_DIR24R8", /* name */ | |
170 | TRUE, /* partial_inplace */ | |
171 | 0xff000000, /* src_mask */ | |
172 | 0x00ffffff, /* dst_mask */ | |
173 | FALSE), /* pcrel_offset */ | |
174 | #define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1) | |
175 | HOWTO (R_H8_DIR32A16, /* type */ | |
176 | 0, /* rightshift */ | |
177 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
178 | 32, /* bitsize */ | |
179 | FALSE, /* pc_relative */ | |
180 | 0, /* bitpos */ | |
181 | complain_overflow_dont,/* complain_on_overflow */ | |
182 | special, /* special_function */ | |
183 | "R_H8_DIR32A16", /* name */ | |
184 | FALSE, /* partial_inplace */ | |
185 | 0, /* src_mask */ | |
186 | 0xffffffff, /* dst_mask */ | |
187 | FALSE), /* pcrel_offset */ | |
188 | #define R_H8_DISP32A16_X (R_H8_DIR32A16_X + 1) | |
189 | HOWTO (R_H8_DISP32A16, /* type */ | |
190 | 0, /* rightshift */ | |
191 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
192 | 32, /* bitsize */ | |
193 | FALSE, /* pc_relative */ | |
194 | 0, /* bitpos */ | |
195 | complain_overflow_dont,/* complain_on_overflow */ | |
196 | special, /* special_function */ | |
197 | "R_H8_DISP32A16", /* name */ | |
198 | FALSE, /* partial_inplace */ | |
199 | 0, /* src_mask */ | |
200 | 0xffffffff, /* dst_mask */ | |
201 | FALSE), /* pcrel_offset */ | |
202 | #define R_H8_PCREL16_X (R_H8_DISP32A16_X + 1) | |
203 | HOWTO (R_H8_PCREL16, /* type */ | |
204 | 0, /* rightshift */ | |
205 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
206 | 16, /* bitsize */ | |
207 | TRUE, /* pc_relative */ | |
208 | 0, /* bitpos */ | |
209 | complain_overflow_signed,/* complain_on_overflow */ | |
210 | special, /* special_function */ | |
211 | "R_H8_PCREL16", /* name */ | |
212 | FALSE, /* partial_inplace */ | |
213 | 0xffff, /* src_mask */ | |
214 | 0xffff, /* dst_mask */ | |
215 | TRUE), /* pcrel_offset */ | |
216 | #define R_H8_PCREL8_X (R_H8_PCREL16_X + 1) | |
217 | HOWTO (R_H8_PCREL8, /* type */ | |
218 | 0, /* rightshift */ | |
219 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
220 | 8, /* bitsize */ | |
221 | TRUE, /* pc_relative */ | |
222 | 0, /* bitpos */ | |
223 | complain_overflow_signed,/* complain_on_overflow */ | |
224 | special, /* special_function */ | |
225 | "R_H8_PCREL8", /* name */ | |
226 | FALSE, /* partial_inplace */ | |
227 | 0xff, /* src_mask */ | |
228 | 0xff, /* dst_mask */ | |
229 | TRUE), /* pcrel_offset */ | |
230 | }; | |
231 | ||
232 | /* This structure is used to map BFD reloc codes to H8 ELF relocs. */ | |
233 | ||
234 | struct elf_reloc_map { | |
235 | bfd_reloc_code_real_type bfd_reloc_val; | |
236 | unsigned char howto_index; | |
237 | }; | |
238 | ||
239 | /* An array mapping BFD reloc codes to H8 ELF relocs. */ | |
240 | ||
241 | static const struct elf_reloc_map h8_reloc_map[] = { | |
242 | { BFD_RELOC_NONE, R_H8_NONE_X }, | |
243 | { BFD_RELOC_32, R_H8_DIR32_X }, | |
244 | { BFD_RELOC_16, R_H8_DIR16_X }, | |
245 | { BFD_RELOC_8, R_H8_DIR8_X }, | |
246 | { BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X }, | |
247 | { BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X }, | |
248 | { BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X }, | |
249 | { BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X }, | |
250 | { BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X }, | |
251 | { BFD_RELOC_H8_DISP32A16, R_H8_DISP32A16_X }, | |
252 | { BFD_RELOC_16_PCREL, R_H8_PCREL16_X }, | |
253 | { BFD_RELOC_8_PCREL, R_H8_PCREL8_X }, | |
254 | }; | |
255 | ||
256 | ||
257 | static reloc_howto_type * | |
258 | elf32_h8_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
259 | bfd_reloc_code_real_type code) | |
260 | { | |
261 | unsigned int i; | |
262 | ||
263 | for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
264 | { | |
265 | if (h8_reloc_map[i].bfd_reloc_val == code) | |
266 | return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index]; | |
267 | } | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | static reloc_howto_type * | |
272 | elf32_h8_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
273 | const char *r_name) | |
274 | { | |
275 | unsigned int i; | |
276 | ||
277 | for (i = 0; | |
278 | i < sizeof (h8_elf_howto_table) / sizeof (h8_elf_howto_table[0]); | |
279 | i++) | |
280 | if (h8_elf_howto_table[i].name != NULL | |
281 | && strcasecmp (h8_elf_howto_table[i].name, r_name) == 0) | |
282 | return &h8_elf_howto_table[i]; | |
283 | ||
284 | return NULL; | |
285 | } | |
286 | ||
287 | static void | |
288 | elf32_h8_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, | |
289 | Elf_Internal_Rela *elf_reloc) | |
290 | { | |
291 | unsigned int r; | |
292 | unsigned int i; | |
293 | ||
294 | r = ELF32_R_TYPE (elf_reloc->r_info); | |
295 | for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++) | |
296 | if (h8_elf_howto_table[i].type == r) | |
297 | { | |
298 | bfd_reloc->howto = &h8_elf_howto_table[i]; | |
299 | return; | |
300 | } | |
301 | abort (); | |
302 | } | |
303 | ||
304 | static void | |
305 | elf32_h8_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, | |
306 | Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED) | |
307 | { | |
308 | unsigned int r; | |
309 | ||
310 | abort (); | |
311 | r = ELF32_R_TYPE (elf_reloc->r_info); | |
312 | bfd_reloc->howto = &h8_elf_howto_table[r]; | |
313 | } | |
314 | ||
315 | /* Special handling for H8/300 relocs. | |
316 | We only come here for pcrel stuff and return normally if not an -r link. | |
317 | When doing -r, we can't do any arithmetic for the pcrel stuff, because | |
318 | we support relaxing on the H8/300 series chips. */ | |
319 | static bfd_reloc_status_type | |
320 | special (bfd *abfd ATTRIBUTE_UNUSED, | |
321 | arelent *reloc_entry ATTRIBUTE_UNUSED, | |
322 | asymbol *symbol ATTRIBUTE_UNUSED, | |
323 | void * data ATTRIBUTE_UNUSED, | |
324 | asection *input_section ATTRIBUTE_UNUSED, | |
325 | bfd *output_bfd, | |
326 | char **error_message ATTRIBUTE_UNUSED) | |
327 | { | |
328 | if (output_bfd == (bfd *) NULL) | |
329 | return bfd_reloc_continue; | |
330 | ||
331 | /* Adjust the reloc address to that in the output section. */ | |
332 | reloc_entry->address += input_section->output_offset; | |
333 | return bfd_reloc_ok; | |
334 | } | |
335 | ||
336 | /* Perform a relocation as part of a final link. */ | |
337 | static bfd_reloc_status_type | |
338 | elf32_h8_final_link_relocate (unsigned long r_type, bfd *input_bfd, | |
339 | bfd *output_bfd ATTRIBUTE_UNUSED, | |
340 | asection *input_section ATTRIBUTE_UNUSED, | |
341 | bfd_byte *contents, bfd_vma offset, | |
342 | bfd_vma value, bfd_vma addend, | |
343 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
344 | asection *sym_sec ATTRIBUTE_UNUSED, | |
345 | int is_local ATTRIBUTE_UNUSED) | |
346 | { | |
347 | bfd_byte *hit_data = contents + offset; | |
348 | ||
349 | switch (r_type) | |
350 | { | |
351 | case R_H8_NONE: | |
352 | return bfd_reloc_ok; | |
353 | ||
354 | case R_H8_DIR32: | |
355 | case R_H8_DIR32A16: | |
356 | case R_H8_DISP32A16: | |
357 | case R_H8_DIR24A8: | |
358 | value += addend; | |
359 | bfd_put_32 (input_bfd, value, hit_data); | |
360 | return bfd_reloc_ok; | |
361 | ||
362 | case R_H8_DIR16: | |
363 | case R_H8_DIR16A8: | |
364 | case R_H8_DIR16R8: | |
365 | value += addend; | |
366 | bfd_put_16 (input_bfd, value, hit_data); | |
367 | return bfd_reloc_ok; | |
368 | ||
369 | /* AKA R_RELBYTE */ | |
370 | case R_H8_DIR8: | |
371 | value += addend; | |
372 | ||
373 | bfd_put_8 (input_bfd, value, hit_data); | |
374 | return bfd_reloc_ok; | |
375 | ||
376 | case R_H8_DIR24R8: | |
377 | value += addend; | |
378 | ||
379 | /* HIT_DATA is the address for the first byte for the relocated | |
380 | value. Subtract 1 so that we can manipulate the data in 32-bit | |
381 | hunks. */ | |
382 | hit_data--; | |
383 | ||
384 | /* Clear out the top byte in value. */ | |
385 | value &= 0xffffff; | |
386 | ||
387 | /* Retrieve the type byte for value from the section contents. */ | |
388 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); | |
389 | ||
390 | /* Now scribble it out in one 32-bit hunk. */ | |
391 | bfd_put_32 (input_bfd, value, hit_data); | |
392 | return bfd_reloc_ok; | |
393 | ||
394 | case R_H8_PCREL16: | |
395 | value -= (input_section->output_section->vma | |
396 | + input_section->output_offset); | |
397 | value -= offset; | |
398 | value += addend; | |
399 | ||
400 | /* The value is relative to the start of the instruction, | |
401 | not the relocation offset. Subtract 2 to account for | |
402 | this minor issue. */ | |
403 | value -= 2; | |
404 | ||
405 | bfd_put_16 (input_bfd, value, hit_data); | |
406 | return bfd_reloc_ok; | |
407 | ||
408 | case R_H8_PCREL8: | |
409 | value -= (input_section->output_section->vma | |
410 | + input_section->output_offset); | |
411 | value -= offset; | |
412 | value += addend; | |
413 | ||
414 | /* The value is relative to the start of the instruction, | |
415 | not the relocation offset. Subtract 1 to account for | |
416 | this minor issue. */ | |
417 | value -= 1; | |
418 | ||
419 | bfd_put_8 (input_bfd, value, hit_data); | |
420 | return bfd_reloc_ok; | |
421 | ||
422 | default: | |
423 | return bfd_reloc_notsupported; | |
424 | } | |
425 | } | |
426 | \f | |
427 | /* Relocate an H8 ELF section. */ | |
428 | static bfd_boolean | |
429 | elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, | |
430 | bfd *input_bfd, asection *input_section, | |
431 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
432 | Elf_Internal_Sym *local_syms, | |
433 | asection **local_sections) | |
434 | { | |
435 | Elf_Internal_Shdr *symtab_hdr; | |
436 | struct elf_link_hash_entry **sym_hashes; | |
437 | Elf_Internal_Rela *rel, *relend; | |
438 | ||
439 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
440 | sym_hashes = elf_sym_hashes (input_bfd); | |
441 | ||
442 | rel = relocs; | |
443 | relend = relocs + input_section->reloc_count; | |
444 | for (; rel < relend; rel++) | |
445 | { | |
446 | unsigned int r_type; | |
447 | unsigned long r_symndx; | |
448 | Elf_Internal_Sym *sym; | |
449 | asection *sec; | |
450 | struct elf_link_hash_entry *h; | |
451 | bfd_vma relocation; | |
452 | bfd_reloc_status_type r; | |
453 | arelent bfd_reloc; | |
454 | reloc_howto_type *howto; | |
455 | ||
456 | elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel); | |
457 | howto = bfd_reloc.howto; | |
458 | ||
459 | r_symndx = ELF32_R_SYM (rel->r_info); | |
460 | r_type = ELF32_R_TYPE (rel->r_info); | |
461 | h = NULL; | |
462 | sym = NULL; | |
463 | sec = NULL; | |
464 | if (r_symndx < symtab_hdr->sh_info) | |
465 | { | |
466 | sym = local_syms + r_symndx; | |
467 | sec = local_sections[r_symndx]; | |
468 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
469 | } | |
470 | else | |
471 | { | |
472 | bfd_boolean unresolved_reloc, warned, ignored; | |
473 | ||
474 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
475 | r_symndx, symtab_hdr, sym_hashes, | |
476 | h, sec, relocation, | |
477 | unresolved_reloc, warned, ignored); | |
478 | } | |
479 | ||
480 | if (sec != NULL && discarded_section (sec)) | |
481 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
482 | rel, 1, relend, howto, 0, contents); | |
483 | ||
484 | if (bfd_link_relocatable (info)) | |
485 | continue; | |
486 | ||
487 | r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd, | |
488 | input_section, | |
489 | contents, rel->r_offset, | |
490 | relocation, rel->r_addend, | |
491 | info, sec, h == NULL); | |
492 | ||
493 | if (r != bfd_reloc_ok) | |
494 | { | |
495 | const char *name; | |
496 | const char *msg = (const char *) 0; | |
497 | ||
498 | if (h != NULL) | |
499 | name = h->root.root.string; | |
500 | else | |
501 | { | |
502 | name = (bfd_elf_string_from_elf_section | |
503 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
504 | if (name == NULL || *name == '\0') | |
505 | name = bfd_section_name (input_bfd, sec); | |
506 | } | |
507 | ||
508 | switch (r) | |
509 | { | |
510 | case bfd_reloc_overflow: | |
511 | (*info->callbacks->reloc_overflow) | |
512 | (info, (h ? &h->root : NULL), name, howto->name, | |
513 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
514 | break; | |
515 | ||
516 | case bfd_reloc_undefined: | |
517 | (*info->callbacks->undefined_symbol) | |
518 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
519 | break; | |
520 | ||
521 | case bfd_reloc_outofrange: | |
522 | msg = _("internal error: out of range error"); | |
523 | goto common_error; | |
524 | ||
525 | case bfd_reloc_notsupported: | |
526 | msg = _("internal error: unsupported relocation error"); | |
527 | goto common_error; | |
528 | ||
529 | case bfd_reloc_dangerous: | |
530 | msg = _("internal error: dangerous error"); | |
531 | goto common_error; | |
532 | ||
533 | default: | |
534 | msg = _("internal error: unknown error"); | |
535 | /* fall through */ | |
536 | ||
537 | common_error: | |
538 | (*info->callbacks->warning) (info, msg, name, input_bfd, | |
539 | input_section, rel->r_offset); | |
540 | break; | |
541 | } | |
542 | } | |
543 | } | |
544 | ||
545 | return TRUE; | |
546 | } | |
547 | ||
548 | /* Object files encode the specific H8 model they were compiled | |
549 | for in the ELF flags field. | |
550 | ||
551 | Examine that field and return the proper BFD machine type for | |
552 | the object file. */ | |
553 | static unsigned long | |
554 | elf32_h8_mach (flagword flags) | |
555 | { | |
556 | switch (flags & EF_H8_MACH) | |
557 | { | |
558 | case E_H8_MACH_H8300: | |
559 | default: | |
560 | return bfd_mach_h8300; | |
561 | ||
562 | case E_H8_MACH_H8300H: | |
563 | return bfd_mach_h8300h; | |
564 | ||
565 | case E_H8_MACH_H8300S: | |
566 | return bfd_mach_h8300s; | |
567 | ||
568 | case E_H8_MACH_H8300HN: | |
569 | return bfd_mach_h8300hn; | |
570 | ||
571 | case E_H8_MACH_H8300SN: | |
572 | return bfd_mach_h8300sn; | |
573 | ||
574 | case E_H8_MACH_H8300SX: | |
575 | return bfd_mach_h8300sx; | |
576 | ||
577 | case E_H8_MACH_H8300SXN: | |
578 | return bfd_mach_h8300sxn; | |
579 | } | |
580 | } | |
581 | ||
582 | /* The final processing done just before writing out a H8 ELF object | |
583 | file. We use this opportunity to encode the BFD machine type | |
584 | into the flags field in the object file. */ | |
585 | ||
586 | static void | |
587 | elf32_h8_final_write_processing (bfd *abfd, | |
588 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
589 | { | |
590 | unsigned long val; | |
591 | ||
592 | switch (bfd_get_mach (abfd)) | |
593 | { | |
594 | default: | |
595 | case bfd_mach_h8300: | |
596 | val = E_H8_MACH_H8300; | |
597 | break; | |
598 | ||
599 | case bfd_mach_h8300h: | |
600 | val = E_H8_MACH_H8300H; | |
601 | break; | |
602 | ||
603 | case bfd_mach_h8300s: | |
604 | val = E_H8_MACH_H8300S; | |
605 | break; | |
606 | ||
607 | case bfd_mach_h8300hn: | |
608 | val = E_H8_MACH_H8300HN; | |
609 | break; | |
610 | ||
611 | case bfd_mach_h8300sn: | |
612 | val = E_H8_MACH_H8300SN; | |
613 | break; | |
614 | ||
615 | case bfd_mach_h8300sx: | |
616 | val = E_H8_MACH_H8300SX; | |
617 | break; | |
618 | ||
619 | case bfd_mach_h8300sxn: | |
620 | val = E_H8_MACH_H8300SXN; | |
621 | break; | |
622 | } | |
623 | ||
624 | elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH); | |
625 | elf_elfheader (abfd)->e_flags |= val; | |
626 | } | |
627 | ||
628 | /* Return nonzero if ABFD represents a valid H8 ELF object file; also | |
629 | record the encoded machine type found in the ELF flags. */ | |
630 | ||
631 | static bfd_boolean | |
632 | elf32_h8_object_p (bfd *abfd) | |
633 | { | |
634 | bfd_default_set_arch_mach (abfd, bfd_arch_h8300, | |
635 | elf32_h8_mach (elf_elfheader (abfd)->e_flags)); | |
636 | return TRUE; | |
637 | } | |
638 | ||
639 | /* Merge backend specific data from an object file to the output | |
640 | object file when linking. The only data we need to copy at this | |
641 | time is the architecture/machine information. */ | |
642 | ||
643 | static bfd_boolean | |
644 | elf32_h8_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) | |
645 | { | |
646 | bfd *obfd = info->output_bfd; | |
647 | ||
648 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
649 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
650 | return TRUE; | |
651 | ||
652 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
653 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
654 | { | |
655 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
656 | bfd_get_mach (ibfd))) | |
657 | return FALSE; | |
658 | } | |
659 | ||
660 | return TRUE; | |
661 | } | |
662 | ||
663 | /* This function handles relaxing for the H8.. | |
664 | ||
665 | There are a few relaxing opportunities available on the H8: | |
666 | ||
667 | jmp/jsr:24 -> bra/bsr:8 2 bytes | |
668 | The jmp may be completely eliminated if the previous insn is a | |
669 | conditional branch to the insn after the jump. In that case | |
670 | we invert the branch and delete the jump and save 4 bytes. | |
671 | ||
672 | bCC:16 -> bCC:8 2 bytes | |
673 | bsr:16 -> bsr:8 2 bytes | |
674 | ||
675 | bset:16 -> bset:8 2 bytes | |
676 | bset:24/32 -> bset:8 4 bytes | |
677 | (also applicable to other bit manipulation instructions) | |
678 | ||
679 | mov.b:16 -> mov.b:8 2 bytes | |
680 | mov.b:24/32 -> mov.b:8 4 bytes | |
681 | ||
682 | bset:24/32 -> bset:16 2 bytes | |
683 | (also applicable to other bit manipulation instructions) | |
684 | ||
685 | mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes | |
686 | ||
687 | mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes. */ | |
688 | ||
689 | static bfd_boolean | |
690 | elf32_h8_relax_section (bfd *abfd, asection *sec, | |
691 | struct bfd_link_info *link_info, bfd_boolean *again) | |
692 | { | |
693 | Elf_Internal_Shdr *symtab_hdr; | |
694 | Elf_Internal_Rela *internal_relocs; | |
695 | Elf_Internal_Rela *irel, *irelend; | |
696 | bfd_byte *contents = NULL; | |
697 | Elf_Internal_Sym *isymbuf = NULL; | |
698 | static asection *last_input_section = NULL; | |
699 | static Elf_Internal_Rela *last_reloc = NULL; | |
700 | ||
701 | /* Assume nothing changes. */ | |
702 | *again = FALSE; | |
703 | ||
704 | /* We don't have to do anything for a relocatable link, if | |
705 | this section does not have relocs, or if this is not a | |
706 | code section. */ | |
707 | if (bfd_link_relocatable (link_info) | |
708 | || (sec->flags & SEC_RELOC) == 0 | |
709 | || sec->reloc_count == 0 | |
710 | || (sec->flags & SEC_CODE) == 0) | |
711 | return TRUE; | |
712 | ||
713 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
714 | ||
715 | /* Get a copy of the native relocations. */ | |
716 | internal_relocs = (_bfd_elf_link_read_relocs | |
717 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
718 | link_info->keep_memory)); | |
719 | if (internal_relocs == NULL) | |
720 | goto error_return; | |
721 | ||
722 | if (sec != last_input_section) | |
723 | last_reloc = NULL; | |
724 | ||
725 | last_input_section = sec; | |
726 | ||
727 | /* Walk through the relocs looking for relaxing opportunities. */ | |
728 | irelend = internal_relocs + sec->reloc_count; | |
729 | for (irel = internal_relocs; irel < irelend; irel++) | |
730 | { | |
731 | bfd_vma symval; | |
732 | ||
733 | { | |
734 | arelent bfd_reloc; | |
735 | ||
736 | elf32_h8_info_to_howto (abfd, &bfd_reloc, irel); | |
737 | } | |
738 | /* Keep track of the previous reloc so that we can delete | |
739 | some long jumps created by the compiler. */ | |
740 | if (irel != internal_relocs) | |
741 | last_reloc = irel - 1; | |
742 | ||
743 | switch(ELF32_R_TYPE (irel->r_info)) | |
744 | { | |
745 | case R_H8_DIR24R8: | |
746 | case R_H8_PCREL16: | |
747 | case R_H8_DIR16A8: | |
748 | case R_H8_DIR24A8: | |
749 | case R_H8_DIR32A16: | |
750 | case R_H8_DISP32A16: | |
751 | break; | |
752 | default: | |
753 | continue; | |
754 | } | |
755 | ||
756 | /* Get the section contents if we haven't done so already. */ | |
757 | if (contents == NULL) | |
758 | { | |
759 | /* Get cached copy if it exists. */ | |
760 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
761 | contents = elf_section_data (sec)->this_hdr.contents; | |
762 | else | |
763 | { | |
764 | /* Go get them off disk. */ | |
765 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
766 | goto error_return; | |
767 | } | |
768 | } | |
769 | ||
770 | /* Read this BFD's local symbols if we haven't done so already. */ | |
771 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
772 | { | |
773 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
774 | if (isymbuf == NULL) | |
775 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
776 | symtab_hdr->sh_info, 0, | |
777 | NULL, NULL, NULL); | |
778 | if (isymbuf == NULL) | |
779 | goto error_return; | |
780 | } | |
781 | ||
782 | /* Get the value of the symbol referred to by the reloc. */ | |
783 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
784 | { | |
785 | /* A local symbol. */ | |
786 | Elf_Internal_Sym *isym; | |
787 | asection *sym_sec; | |
788 | ||
789 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
790 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
791 | symval = isym->st_value; | |
792 | /* If the reloc is absolute, it will not have | |
793 | a symbol or section associated with it. */ | |
794 | if (sym_sec) | |
795 | symval += sym_sec->output_section->vma | |
796 | + sym_sec->output_offset; | |
797 | } | |
798 | else | |
799 | { | |
800 | unsigned long indx; | |
801 | struct elf_link_hash_entry *h; | |
802 | ||
803 | /* An external symbol. */ | |
804 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
805 | h = elf_sym_hashes (abfd)[indx]; | |
806 | BFD_ASSERT (h != NULL); | |
807 | if (h->root.type != bfd_link_hash_defined | |
808 | && h->root.type != bfd_link_hash_defweak) | |
809 | { | |
810 | /* This appears to be a reference to an undefined | |
811 | symbol. Just ignore it--it will be caught by the | |
812 | regular reloc processing. */ | |
813 | continue; | |
814 | } | |
815 | ||
816 | symval = (h->root.u.def.value | |
817 | + h->root.u.def.section->output_section->vma | |
818 | + h->root.u.def.section->output_offset); | |
819 | } | |
820 | ||
821 | /* For simplicity of coding, we are going to modify the section | |
822 | contents, the section relocs, and the BFD symbol table. We | |
823 | must tell the rest of the code not to free up this | |
824 | information. It would be possible to instead create a table | |
825 | of changes which have to be made, as is done in coff-mips.c; | |
826 | that would be more work, but would require less memory when | |
827 | the linker is run. */ | |
828 | switch (ELF32_R_TYPE (irel->r_info)) | |
829 | { | |
830 | /* Try to turn a 24-bit absolute branch/call into an 8-bit | |
831 | pc-relative branch/call. */ | |
832 | case R_H8_DIR24R8: | |
833 | { | |
834 | bfd_vma value = symval + irel->r_addend; | |
835 | bfd_vma dot, gap; | |
836 | ||
837 | /* Get the address of this instruction. */ | |
838 | dot = (sec->output_section->vma | |
839 | + sec->output_offset + irel->r_offset - 1); | |
840 | ||
841 | /* Compute the distance from this insn to the branch target. */ | |
842 | gap = value - dot; | |
843 | ||
844 | /* If the distance is within -126..+130 inclusive, then we can | |
845 | relax this jump. +130 is valid since the target will move | |
846 | two bytes closer if we do relax this branch. */ | |
847 | if ((int) gap >= -126 && (int) gap <= 130) | |
848 | { | |
849 | unsigned char code; | |
850 | ||
851 | /* Note that we've changed the relocs, section contents, | |
852 | etc. */ | |
853 | elf_section_data (sec)->relocs = internal_relocs; | |
854 | elf_section_data (sec)->this_hdr.contents = contents; | |
855 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
856 | ||
857 | /* Get the instruction code being relaxed. */ | |
858 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
859 | ||
860 | /* If the previous instruction conditionally jumped around | |
861 | this instruction, we may be able to reverse the condition | |
862 | and redirect the previous instruction to the target of | |
863 | this instruction. | |
864 | ||
865 | Such sequences are used by the compiler to deal with | |
866 | long conditional branches. | |
867 | ||
868 | Only perform this optimisation for jumps (code 0x5a) not | |
869 | subroutine calls, as otherwise it could transform: | |
870 | ||
871 | mov.w r0,r0 | |
872 | beq .L1 | |
873 | jsr @_bar | |
874 | .L1: rts | |
875 | _bar: rts | |
876 | into: | |
877 | mov.w r0,r0 | |
878 | bne _bar | |
879 | rts | |
880 | _bar: rts | |
881 | ||
882 | which changes the call (jsr) into a branch (bne). */ | |
883 | if (code == 0x5a /* jmp24. */ | |
884 | && (int) gap <= 130 | |
885 | && (int) gap >= -128 | |
886 | && last_reloc | |
887 | && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8 | |
888 | && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info) | |
889 | { | |
890 | bfd_vma last_value; | |
891 | asection *last_sym_sec; | |
892 | Elf_Internal_Sym *last_sym; | |
893 | ||
894 | /* We will need to examine the symbol used by the | |
895 | previous relocation. */ | |
896 | ||
897 | last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info); | |
898 | last_sym_sec | |
899 | = bfd_section_from_elf_index (abfd, last_sym->st_shndx); | |
900 | last_value = (last_sym->st_value | |
901 | + last_sym_sec->output_section->vma | |
902 | + last_sym_sec->output_offset); | |
903 | ||
904 | /* Verify that the previous relocation was for a | |
905 | branch around this instruction and that no symbol | |
906 | exists at the current location. */ | |
907 | if (last_value == dot + 4 | |
908 | && last_reloc->r_offset + 2 == irel->r_offset | |
909 | && ! elf32_h8_symbol_address_p (abfd, sec, dot)) | |
910 | { | |
911 | /* We can eliminate this jump. Twiddle the | |
912 | previous relocation as necessary. */ | |
913 | irel->r_info | |
914 | = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
915 | ELF32_R_TYPE (R_H8_NONE)); | |
916 | ||
917 | last_reloc->r_info | |
918 | = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
919 | ELF32_R_TYPE (R_H8_PCREL8)); | |
920 | last_reloc->r_addend = irel->r_addend; | |
921 | ||
922 | code = bfd_get_8 (abfd, | |
923 | contents + last_reloc->r_offset - 1); | |
924 | code ^= 1; | |
925 | bfd_put_8 (abfd, | |
926 | code, | |
927 | contents + last_reloc->r_offset - 1); | |
928 | ||
929 | /* Delete four bytes of data. */ | |
930 | if (!elf32_h8_relax_delete_bytes (abfd, sec, | |
931 | irel->r_offset - 1, | |
932 | 4)) | |
933 | goto error_return; | |
934 | ||
935 | *again = TRUE; | |
936 | break; | |
937 | } | |
938 | } | |
939 | ||
940 | if (code == 0x5e) | |
941 | /* This is jsr24 */ | |
942 | bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); /* bsr8. */ | |
943 | else if (code == 0x5a) | |
944 | /* This is jmp24 */ | |
945 | bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); /* bra8. */ | |
946 | else | |
947 | abort (); | |
948 | ||
949 | /* Fix the relocation's type. */ | |
950 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
951 | R_H8_PCREL8); | |
952 | ||
953 | /* Delete two bytes of data. */ | |
954 | if (!elf32_h8_relax_delete_bytes (abfd, sec, | |
955 | irel->r_offset + 1, 2)) | |
956 | goto error_return; | |
957 | ||
958 | /* That will change things, so, we should relax again. | |
959 | Note that this is not required, and it may be slow. */ | |
960 | *again = TRUE; | |
961 | } | |
962 | break; | |
963 | } | |
964 | ||
965 | /* Try to turn a 16-bit pc-relative branch into a 8-bit pc-relative | |
966 | branch. */ | |
967 | case R_H8_PCREL16: | |
968 | { | |
969 | bfd_vma value = symval + irel->r_addend; | |
970 | bfd_vma dot; | |
971 | bfd_vma gap; | |
972 | ||
973 | /* Get the address of this instruction. */ | |
974 | dot = (sec->output_section->vma | |
975 | + sec->output_offset | |
976 | + irel->r_offset - 2); | |
977 | ||
978 | gap = value - dot; | |
979 | ||
980 | /* If the distance is within -126..+130 inclusive, then we can | |
981 | relax this jump. +130 is valid since the target will move | |
982 | two bytes closer if we do relax this branch. */ | |
983 | if ((int) gap >= -126 && (int) gap <= 130) | |
984 | { | |
985 | unsigned char code; | |
986 | ||
987 | /* Note that we've changed the relocs, section contents, | |
988 | etc. */ | |
989 | elf_section_data (sec)->relocs = internal_relocs; | |
990 | elf_section_data (sec)->this_hdr.contents = contents; | |
991 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
992 | ||
993 | /* Get the opcode. */ | |
994 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
995 | ||
996 | if (code == 0x58) | |
997 | { | |
998 | /* bCC:16 -> bCC:8 */ | |
999 | /* Get the second byte of the original insn, which | |
1000 | contains the condition code. */ | |
1001 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1002 | ||
1003 | /* Compute the first byte of the relaxed | |
1004 | instruction. The original sequence 0x58 0xX0 | |
1005 | is relaxed to 0x4X, where X represents the | |
1006 | condition code. */ | |
1007 | code &= 0xf0; | |
1008 | code >>= 4; | |
1009 | code |= 0x40; | |
1010 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); /* bCC:8. */ | |
1011 | } | |
1012 | else if (code == 0x5c) /* bsr16. */ | |
1013 | /* This is bsr. */ | |
1014 | bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); /* bsr8. */ | |
1015 | else | |
1016 | /* Might be MOVSD. */ | |
1017 | break; | |
1018 | ||
1019 | /* Fix the relocation's type. */ | |
1020 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1021 | R_H8_PCREL8); | |
1022 | irel->r_offset--; | |
1023 | ||
1024 | /* Delete two bytes of data. */ | |
1025 | if (!elf32_h8_relax_delete_bytes (abfd, sec, | |
1026 | irel->r_offset + 1, 2)) | |
1027 | goto error_return; | |
1028 | ||
1029 | /* That will change things, so, we should relax again. | |
1030 | Note that this is not required, and it may be slow. */ | |
1031 | *again = TRUE; | |
1032 | } | |
1033 | break; | |
1034 | } | |
1035 | ||
1036 | /* This is a 16-bit absolute address in one of the following | |
1037 | instructions: | |
1038 | ||
1039 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", | |
1040 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and | |
1041 | "mov.b" | |
1042 | ||
1043 | We may relax this into an 8-bit absolute address if it's in | |
1044 | the right range. */ | |
1045 | case R_H8_DIR16A8: | |
1046 | { | |
1047 | bfd_vma value; | |
1048 | ||
1049 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); | |
1050 | if (value >= 0xffffff00u) | |
1051 | { | |
1052 | unsigned char code; | |
1053 | unsigned char temp_code; | |
1054 | ||
1055 | /* Note that we've changed the relocs, section contents, | |
1056 | etc. */ | |
1057 | elf_section_data (sec)->relocs = internal_relocs; | |
1058 | elf_section_data (sec)->this_hdr.contents = contents; | |
1059 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1060 | ||
1061 | /* Get the opcode. */ | |
1062 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
1063 | ||
1064 | /* All instructions with R_H8_DIR16A8 start with | |
1065 | 0x6a. */ | |
1066 | if (code != 0x6a) | |
1067 | abort (); | |
1068 | ||
1069 | temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1070 | /* If this is a mov.b instruction, clear the lower | |
1071 | nibble, which contains the source/destination | |
1072 | register number. */ | |
1073 | if ((temp_code & 0x10) != 0x10) | |
1074 | temp_code &= 0xf0; | |
1075 | ||
1076 | switch (temp_code) | |
1077 | { | |
1078 | case 0x00: | |
1079 | /* This is mov.b @aa:16,Rd. */ | |
1080 | bfd_put_8 (abfd, (code & 0xf) | 0x20, | |
1081 | contents + irel->r_offset - 2); | |
1082 | break; | |
1083 | case 0x80: | |
1084 | /* This is mov.b Rs,@aa:16. */ | |
1085 | bfd_put_8 (abfd, (code & 0xf) | 0x30, | |
1086 | contents + irel->r_offset - 2); | |
1087 | break; | |
1088 | case 0x18: | |
1089 | /* This is a bit-maniputation instruction that | |
1090 | stores one bit into memory, one of "bclr", | |
1091 | "bist", "bnot", "bset", and "bst". */ | |
1092 | bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); | |
1093 | break; | |
1094 | case 0x10: | |
1095 | /* This is a bit-maniputation instruction that | |
1096 | loads one bit from memory, one of "band", | |
1097 | "biand", "bild", "bior", "bixor", "bld", "bor", | |
1098 | "btst", and "bxor". */ | |
1099 | bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); | |
1100 | break; | |
1101 | default: | |
1102 | abort (); | |
1103 | } | |
1104 | ||
1105 | /* Fix the relocation's type. */ | |
1106 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1107 | R_H8_DIR8); | |
1108 | ||
1109 | /* Move the relocation. */ | |
1110 | irel->r_offset--; | |
1111 | ||
1112 | /* Delete two bytes of data. */ | |
1113 | if (!elf32_h8_relax_delete_bytes (abfd, sec, | |
1114 | irel->r_offset + 1, 2)) | |
1115 | goto error_return; | |
1116 | ||
1117 | /* That will change things, so, we should relax again. | |
1118 | Note that this is not required, and it may be slow. */ | |
1119 | *again = TRUE; | |
1120 | } | |
1121 | break; | |
1122 | } | |
1123 | ||
1124 | /* This is a 24-bit absolute address in one of the following | |
1125 | instructions: | |
1126 | ||
1127 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", | |
1128 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and | |
1129 | "mov.b" | |
1130 | ||
1131 | We may relax this into an 8-bit absolute address if it's in | |
1132 | the right range. */ | |
1133 | case R_H8_DIR24A8: | |
1134 | { | |
1135 | bfd_vma value; | |
1136 | ||
1137 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); | |
1138 | if (value >= 0xffffff00u) | |
1139 | { | |
1140 | unsigned char code; | |
1141 | unsigned char temp_code; | |
1142 | ||
1143 | /* Note that we've changed the relocs, section contents, | |
1144 | etc. */ | |
1145 | elf_section_data (sec)->relocs = internal_relocs; | |
1146 | elf_section_data (sec)->this_hdr.contents = contents; | |
1147 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1148 | ||
1149 | /* Get the opcode. */ | |
1150 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
1151 | ||
1152 | /* All instructions with R_H8_DIR24A8 start with | |
1153 | 0x6a. */ | |
1154 | if (code != 0x6a) | |
1155 | abort (); | |
1156 | ||
1157 | temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1158 | ||
1159 | /* If this is a mov.b instruction, clear the lower | |
1160 | nibble, which contains the source/destination | |
1161 | register number. */ | |
1162 | if ((temp_code & 0x30) != 0x30) | |
1163 | temp_code &= 0xf0; | |
1164 | ||
1165 | switch (temp_code) | |
1166 | { | |
1167 | case 0x20: | |
1168 | /* This is mov.b @aa:24/32,Rd. */ | |
1169 | bfd_put_8 (abfd, (code & 0xf) | 0x20, | |
1170 | contents + irel->r_offset - 2); | |
1171 | break; | |
1172 | case 0xa0: | |
1173 | /* This is mov.b Rs,@aa:24/32. */ | |
1174 | bfd_put_8 (abfd, (code & 0xf) | 0x30, | |
1175 | contents + irel->r_offset - 2); | |
1176 | break; | |
1177 | case 0x38: | |
1178 | /* This is a bit-maniputation instruction that | |
1179 | stores one bit into memory, one of "bclr", | |
1180 | "bist", "bnot", "bset", and "bst". */ | |
1181 | bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); | |
1182 | break; | |
1183 | case 0x30: | |
1184 | /* This is a bit-maniputation instruction that | |
1185 | loads one bit from memory, one of "band", | |
1186 | "biand", "bild", "bior", "bixor", "bld", "bor", | |
1187 | "btst", and "bxor". */ | |
1188 | bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); | |
1189 | break; | |
1190 | default: | |
1191 | abort(); | |
1192 | } | |
1193 | ||
1194 | /* Fix the relocation's type. */ | |
1195 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1196 | R_H8_DIR8); | |
1197 | irel->r_offset--; | |
1198 | ||
1199 | /* Delete four bytes of data. */ | |
1200 | if (!elf32_h8_relax_delete_bytes (abfd, sec, | |
1201 | irel->r_offset + 1, 4)) | |
1202 | goto error_return; | |
1203 | ||
1204 | /* That will change things, so, we should relax again. | |
1205 | Note that this is not required, and it may be slow. */ | |
1206 | *again = TRUE; | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | /* Fall through. */ | |
1212 | ||
1213 | /* This is a 24-/32-bit absolute address in one of the | |
1214 | following instructions: | |
1215 | ||
1216 | "band", "bclr", "biand", "bild", "bior", "bist", | |
1217 | "bixor", "bld", "bnot", "bor", "bset", "bst", "btst", | |
1218 | "bxor", "ldc.w", "stc.w" and "mov.[bwl]" | |
1219 | ||
1220 | We may relax this into an 16-bit absolute address if it's | |
1221 | in the right range. */ | |
1222 | case R_H8_DIR32A16: | |
1223 | { | |
1224 | bfd_vma value; | |
1225 | ||
1226 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); | |
1227 | if (value <= 0x7fff || value >= 0xffff8000u) | |
1228 | { | |
1229 | unsigned char code; | |
1230 | unsigned char op0, op1, op2, op3; | |
1231 | unsigned char *op_ptr; | |
1232 | ||
1233 | /* Note that we've changed the relocs, section contents, | |
1234 | etc. */ | |
1235 | elf_section_data (sec)->relocs = internal_relocs; | |
1236 | elf_section_data (sec)->this_hdr.contents = contents; | |
1237 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1238 | ||
1239 | if (irel->r_offset >= 4) | |
1240 | { | |
1241 | /* Check for 4-byte MOVA relaxation (SH-specific). */ | |
1242 | int second_reloc = 0; | |
1243 | ||
1244 | op_ptr = contents + irel->r_offset - 4; | |
1245 | ||
1246 | if (last_reloc) | |
1247 | { | |
1248 | arelent bfd_reloc; | |
1249 | reloc_howto_type *h; | |
1250 | bfd_vma last_reloc_size; | |
1251 | ||
1252 | elf32_h8_info_to_howto (abfd, &bfd_reloc, last_reloc); | |
1253 | h = bfd_reloc.howto; | |
1254 | last_reloc_size = 1 << h->size; | |
1255 | if (last_reloc->r_offset + last_reloc_size | |
1256 | == irel->r_offset) | |
1257 | { | |
1258 | op_ptr -= last_reloc_size; | |
1259 | second_reloc = 1; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | if (irel + 1 < irelend) | |
1264 | { | |
1265 | Elf_Internal_Rela *next_reloc = irel + 1; | |
1266 | arelent bfd_reloc; | |
1267 | reloc_howto_type *h; | |
1268 | bfd_vma next_reloc_size; | |
1269 | ||
1270 | elf32_h8_info_to_howto (abfd, &bfd_reloc, next_reloc); | |
1271 | h = bfd_reloc.howto; | |
1272 | next_reloc_size = 1 << h->size; | |
1273 | if (next_reloc->r_offset + next_reloc_size | |
1274 | == irel->r_offset) | |
1275 | { | |
1276 | op_ptr -= next_reloc_size; | |
1277 | second_reloc = 1; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | op0 = bfd_get_8 (abfd, op_ptr + 0); | |
1282 | op1 = bfd_get_8 (abfd, op_ptr + 1); | |
1283 | op2 = bfd_get_8 (abfd, op_ptr + 2); | |
1284 | op3 = bfd_get_8 (abfd, op_ptr + 3); | |
1285 | ||
1286 | if (op0 == 0x01 | |
1287 | && (op1 & 0xdf) == 0x5f | |
1288 | && (op2 & 0x40) == 0x40 | |
1289 | && (op3 & 0x80) == 0x80) | |
1290 | { | |
1291 | if ((op2 & 0x08) == 0) | |
1292 | second_reloc = 1; | |
1293 | ||
1294 | if (second_reloc) | |
1295 | { | |
1296 | op3 &= ~0x08; | |
1297 | bfd_put_8 (abfd, op3, op_ptr + 3); | |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | op2 &= ~0x08; | |
1302 | bfd_put_8 (abfd, op2, op_ptr + 2); | |
1303 | } | |
1304 | goto r_h8_dir32a16_common; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | /* Now check for short version of MOVA. (SH-specific) */ | |
1309 | op_ptr = contents + irel->r_offset - 2; | |
1310 | op0 = bfd_get_8 (abfd, op_ptr + 0); | |
1311 | op1 = bfd_get_8 (abfd, op_ptr + 1); | |
1312 | ||
1313 | if (op0 == 0x7a | |
1314 | && (op1 & 0x88) == 0x80) | |
1315 | { | |
1316 | op1 |= 0x08; | |
1317 | bfd_put_8 (abfd, op1, op_ptr + 1); | |
1318 | goto r_h8_dir32a16_common; | |
1319 | } | |
1320 | ||
1321 | /* Get the opcode. */ | |
1322 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1323 | ||
1324 | /* Fix the opcode. For all the instructions that | |
1325 | belong to this relaxation, we simply need to turn | |
1326 | off bit 0x20 in the previous byte. */ | |
1327 | code &= ~0x20; | |
1328 | ||
1329 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); | |
1330 | ||
1331 | r_h8_dir32a16_common: | |
1332 | /* Fix the relocation's type. */ | |
1333 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1334 | R_H8_DIR16); | |
1335 | ||
1336 | /* Delete two bytes of data. */ | |
1337 | if (!elf32_h8_relax_delete_bytes (abfd, sec, | |
1338 | irel->r_offset + 1, 2)) | |
1339 | goto error_return; | |
1340 | ||
1341 | /* That will change things, so, we should relax again. | |
1342 | Note that this is not required, and it may be slow. */ | |
1343 | *again = TRUE; | |
1344 | } | |
1345 | break; /* case R_H8_DIR32A16 */ | |
1346 | } | |
1347 | ||
1348 | case R_H8_DISP32A16: | |
1349 | /* mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes | |
1350 | It is assured that instruction uses at least 4 bytes opcode before | |
1351 | reloc entry addressing mode "register indirect with displacement" | |
1352 | relaxing options (all saving 4 bytes): | |
1353 | 0x78 0sss0000 0x6A 0010dddd disp:32 mov.b @(d:32,ERs),Rd -> | |
1354 | 0x6E 0sssdddd disp:16 mov.b @(d:16,ERs),Rd | |
1355 | 0x78 0sss0000 0x6B 0010dddd disp:32 mov.w @(d:32,ERs),Rd -> | |
1356 | 0x6F 0sssdddd disp:16 mov.w @(d:16,ERs),Rd | |
1357 | 0x01 0x00 0x78 0sss0000 0x6B 00100ddd disp:32 mov.l @(d:32,ERs),ERd -> | |
1358 | 0x01 0x00 0x6F 0sss0ddd disp:16 mov.l @(d:16,ERs),ERd | |
1359 | ||
1360 | 0x78 0ddd0000 0x6A 1010ssss disp:32 mov.b Rs,@(d:32,ERd) -> | |
1361 | 0x6E 1dddssss disp:16 mov.b Rs,@(d:16,ERd) | |
1362 | 0x78 0ddd0000 0x6B 1010ssss disp:32 mov.w Rs,@(d:32,ERd) -> | |
1363 | 0x6F 1dddssss disp:16 mov.w Rs,@(d:16,ERd) | |
1364 | 0x01 0x00 0x78 xddd0000 0x6B 10100sss disp:32 mov.l ERs,@(d:32,ERd) -> | |
1365 | 0x01 0x00 0x6F 1ddd0sss disp:16 mov.l ERs,@(d:16,ERd) | |
1366 | mov.l prefix 0x01 0x00 can be left as is and mov.l handled same | |
1367 | as mov.w/ */ | |
1368 | { | |
1369 | bfd_vma value; | |
1370 | ||
1371 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); | |
1372 | if (value <= 0x7fff || value >= 0xffff8000u) | |
1373 | { | |
1374 | unsigned char op0, op1, op2, op3, op0n, op1n; | |
1375 | int relax = 0; | |
1376 | ||
1377 | /* Note that we've changed the relocs, section contents, | |
1378 | etc. */ | |
1379 | elf_section_data (sec)->relocs = internal_relocs; | |
1380 | elf_section_data (sec)->this_hdr.contents = contents; | |
1381 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1382 | ||
1383 | if (irel->r_offset >= 4) | |
1384 | { | |
1385 | op0 = bfd_get_8 (abfd, contents + irel->r_offset - 4); | |
1386 | op1 = bfd_get_8 (abfd, contents + irel->r_offset - 3); | |
1387 | op2 = bfd_get_8 (abfd, contents + irel->r_offset - 2); | |
1388 | op3 = bfd_get_8 (abfd, contents + irel->r_offset - 1); | |
1389 | ||
1390 | if (op0 == 0x78) | |
1391 | { | |
1392 | switch(op2) | |
1393 | { | |
1394 | case 0x6A: | |
1395 | if ((op1 & 0x8F) == 0x00 && (op3 & 0x70) == 0x20) | |
1396 | { | |
1397 | /* mov.b. */ | |
1398 | op0n = 0x6E; | |
1399 | relax = 1; | |
1400 | } | |
1401 | break; | |
1402 | case 0x6B: | |
1403 | if ((op1 & 0x0F) == 0x00 && (op3 & 0x70) == 0x20) | |
1404 | { | |
1405 | /* mov.w/l. */ | |
1406 | op0n = 0x6F; | |
1407 | relax = 1; | |
1408 | } | |
1409 | break; | |
1410 | default: | |
1411 | break; | |
1412 | } | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | if (relax) | |
1417 | { | |
1418 | op1n = (op3 & 0x8F) | (op1 & 0x70); | |
1419 | bfd_put_8 (abfd, op0n, contents + irel->r_offset - 4); | |
1420 | bfd_put_8 (abfd, op1n, contents + irel->r_offset - 3); | |
1421 | ||
1422 | /* Fix the relocation's type. */ | |
1423 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_H8_DIR16); | |
1424 | irel->r_offset -= 2; | |
1425 | ||
1426 | /* Delete four bytes of data. */ | |
1427 | if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset + 2, 4)) | |
1428 | goto error_return; | |
1429 | ||
1430 | /* That will change things, so, we should relax again. | |
1431 | Note that this is not required, and it may be slow. */ | |
1432 | *again = TRUE; | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | break; | |
1437 | ||
1438 | default: | |
1439 | break; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | if (isymbuf != NULL | |
1444 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1445 | { | |
1446 | if (! link_info->keep_memory) | |
1447 | free (isymbuf); | |
1448 | else | |
1449 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1450 | } | |
1451 | ||
1452 | if (contents != NULL | |
1453 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1454 | { | |
1455 | if (! link_info->keep_memory) | |
1456 | free (contents); | |
1457 | else | |
1458 | { | |
1459 | /* Cache the section contents for elf_link_input_bfd. */ | |
1460 | elf_section_data (sec)->this_hdr.contents = contents; | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | if (internal_relocs != NULL | |
1465 | && elf_section_data (sec)->relocs != internal_relocs) | |
1466 | free (internal_relocs); | |
1467 | ||
1468 | return TRUE; | |
1469 | ||
1470 | error_return: | |
1471 | if (isymbuf != NULL | |
1472 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1473 | free (isymbuf); | |
1474 | if (contents != NULL | |
1475 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1476 | free (contents); | |
1477 | if (internal_relocs != NULL | |
1478 | && elf_section_data (sec)->relocs != internal_relocs) | |
1479 | free (internal_relocs); | |
1480 | return FALSE; | |
1481 | } | |
1482 | ||
1483 | /* Delete some bytes from a section while relaxing. */ | |
1484 | ||
1485 | static bfd_boolean | |
1486 | elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) | |
1487 | { | |
1488 | Elf_Internal_Shdr *symtab_hdr; | |
1489 | unsigned int sec_shndx; | |
1490 | bfd_byte *contents; | |
1491 | Elf_Internal_Rela *irel, *irelend; | |
1492 | Elf_Internal_Sym *isym; | |
1493 | Elf_Internal_Sym *isymend; | |
1494 | bfd_vma toaddr; | |
1495 | struct elf_link_hash_entry **sym_hashes; | |
1496 | struct elf_link_hash_entry **end_hashes; | |
1497 | unsigned int symcount; | |
1498 | ||
1499 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1500 | ||
1501 | contents = elf_section_data (sec)->this_hdr.contents; | |
1502 | ||
1503 | toaddr = sec->size; | |
1504 | ||
1505 | irel = elf_section_data (sec)->relocs; | |
1506 | irelend = irel + sec->reloc_count; | |
1507 | ||
1508 | /* Actually delete the bytes. */ | |
1509 | memmove (contents + addr, contents + addr + count, | |
1510 | (size_t) (toaddr - addr - count)); | |
1511 | sec->size -= count; | |
1512 | ||
1513 | /* Adjust all the relocs. */ | |
1514 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) | |
1515 | { | |
1516 | /* Get the new reloc address. */ | |
1517 | if ((irel->r_offset > addr | |
1518 | && irel->r_offset <= toaddr)) | |
1519 | irel->r_offset -= count; | |
1520 | } | |
1521 | ||
1522 | /* Adjust the local symbols defined in this section. */ | |
1523 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1524 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1525 | isymend = isym + symtab_hdr->sh_info; | |
1526 | for (; isym < isymend; isym++) | |
1527 | { | |
1528 | if (isym->st_shndx == sec_shndx | |
1529 | && isym->st_value > addr | |
1530 | && isym->st_value <= toaddr) | |
1531 | isym->st_value -= count; | |
1532 | } | |
1533 | ||
1534 | /* Now adjust the global symbols defined in this section. */ | |
1535 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1536 | - symtab_hdr->sh_info); | |
1537 | sym_hashes = elf_sym_hashes (abfd); | |
1538 | end_hashes = sym_hashes + symcount; | |
1539 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1540 | { | |
1541 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1542 | ||
1543 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1544 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1545 | && sym_hash->root.u.def.section == sec | |
1546 | && sym_hash->root.u.def.value > addr | |
1547 | && sym_hash->root.u.def.value <= toaddr) | |
1548 | sym_hash->root.u.def.value -= count; | |
1549 | } | |
1550 | ||
1551 | return TRUE; | |
1552 | } | |
1553 | ||
1554 | /* Return TRUE if a symbol exists at the given address, else return | |
1555 | FALSE. */ | |
1556 | static bfd_boolean | |
1557 | elf32_h8_symbol_address_p (bfd *abfd, asection *sec, bfd_vma addr) | |
1558 | { | |
1559 | Elf_Internal_Shdr *symtab_hdr; | |
1560 | unsigned int sec_shndx; | |
1561 | Elf_Internal_Sym *isym; | |
1562 | Elf_Internal_Sym *isymend; | |
1563 | struct elf_link_hash_entry **sym_hashes; | |
1564 | struct elf_link_hash_entry **end_hashes; | |
1565 | unsigned int symcount; | |
1566 | ||
1567 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1568 | ||
1569 | /* Examine all the symbols. */ | |
1570 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1571 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1572 | isymend = isym + symtab_hdr->sh_info; | |
1573 | for (; isym < isymend; isym++) | |
1574 | { | |
1575 | if (isym->st_shndx == sec_shndx | |
1576 | && isym->st_value == addr) | |
1577 | return TRUE; | |
1578 | } | |
1579 | ||
1580 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1581 | - symtab_hdr->sh_info); | |
1582 | sym_hashes = elf_sym_hashes (abfd); | |
1583 | end_hashes = sym_hashes + symcount; | |
1584 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1585 | { | |
1586 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1587 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1588 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1589 | && sym_hash->root.u.def.section == sec | |
1590 | && sym_hash->root.u.def.value == addr) | |
1591 | return TRUE; | |
1592 | } | |
1593 | ||
1594 | return FALSE; | |
1595 | } | |
1596 | ||
1597 | /* This is a version of bfd_generic_get_relocated_section_contents | |
1598 | which uses elf32_h8_relocate_section. */ | |
1599 | ||
1600 | static bfd_byte * | |
1601 | elf32_h8_get_relocated_section_contents (bfd *output_bfd, | |
1602 | struct bfd_link_info *link_info, | |
1603 | struct bfd_link_order *link_order, | |
1604 | bfd_byte *data, | |
1605 | bfd_boolean relocatable, | |
1606 | asymbol **symbols) | |
1607 | { | |
1608 | Elf_Internal_Shdr *symtab_hdr; | |
1609 | asection *input_section = link_order->u.indirect.section; | |
1610 | bfd *input_bfd = input_section->owner; | |
1611 | asection **sections = NULL; | |
1612 | Elf_Internal_Rela *internal_relocs = NULL; | |
1613 | Elf_Internal_Sym *isymbuf = NULL; | |
1614 | ||
1615 | /* We only need to handle the case of relaxing, or of having a | |
1616 | particular set of section contents, specially. */ | |
1617 | if (relocatable | |
1618 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
1619 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
1620 | link_order, data, | |
1621 | relocatable, | |
1622 | symbols); | |
1623 | ||
1624 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1625 | ||
1626 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
1627 | (size_t) input_section->size); | |
1628 | ||
1629 | if ((input_section->flags & SEC_RELOC) != 0 | |
1630 | && input_section->reloc_count > 0) | |
1631 | { | |
1632 | asection **secpp; | |
1633 | Elf_Internal_Sym *isym, *isymend; | |
1634 | bfd_size_type amt; | |
1635 | ||
1636 | internal_relocs = (_bfd_elf_link_read_relocs | |
1637 | (input_bfd, input_section, NULL, | |
1638 | (Elf_Internal_Rela *) NULL, FALSE)); | |
1639 | if (internal_relocs == NULL) | |
1640 | goto error_return; | |
1641 | ||
1642 | if (symtab_hdr->sh_info != 0) | |
1643 | { | |
1644 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1645 | if (isymbuf == NULL) | |
1646 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
1647 | symtab_hdr->sh_info, 0, | |
1648 | NULL, NULL, NULL); | |
1649 | if (isymbuf == NULL) | |
1650 | goto error_return; | |
1651 | } | |
1652 | ||
1653 | amt = symtab_hdr->sh_info; | |
1654 | amt *= sizeof (asection *); | |
1655 | sections = (asection **) bfd_malloc (amt); | |
1656 | if (sections == NULL && amt != 0) | |
1657 | goto error_return; | |
1658 | ||
1659 | isymend = isymbuf + symtab_hdr->sh_info; | |
1660 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
1661 | { | |
1662 | asection *isec; | |
1663 | ||
1664 | if (isym->st_shndx == SHN_UNDEF) | |
1665 | isec = bfd_und_section_ptr; | |
1666 | else if (isym->st_shndx == SHN_ABS) | |
1667 | isec = bfd_abs_section_ptr; | |
1668 | else if (isym->st_shndx == SHN_COMMON) | |
1669 | isec = bfd_com_section_ptr; | |
1670 | else | |
1671 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); | |
1672 | ||
1673 | *secpp = isec; | |
1674 | } | |
1675 | ||
1676 | if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd, | |
1677 | input_section, data, internal_relocs, | |
1678 | isymbuf, sections)) | |
1679 | goto error_return; | |
1680 | ||
1681 | if (sections != NULL) | |
1682 | free (sections); | |
1683 | if (isymbuf != NULL | |
1684 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1685 | free (isymbuf); | |
1686 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
1687 | free (internal_relocs); | |
1688 | } | |
1689 | ||
1690 | return data; | |
1691 | ||
1692 | error_return: | |
1693 | if (sections != NULL) | |
1694 | free (sections); | |
1695 | if (isymbuf != NULL | |
1696 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1697 | free (isymbuf); | |
1698 | if (internal_relocs != NULL | |
1699 | && elf_section_data (input_section)->relocs != internal_relocs) | |
1700 | free (internal_relocs); | |
1701 | return NULL; | |
1702 | } | |
1703 | ||
1704 | ||
1705 | #define TARGET_BIG_SYM h8300_elf32_vec | |
1706 | #define TARGET_BIG_NAME "elf32-h8300" | |
1707 | #define ELF_ARCH bfd_arch_h8300 | |
1708 | #define ELF_MACHINE_CODE EM_H8_300 | |
1709 | #define ELF_MAXPAGESIZE 0x1 | |
1710 | #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup | |
1711 | #define bfd_elf32_bfd_reloc_name_lookup elf32_h8_reloc_name_lookup | |
1712 | #define elf_info_to_howto elf32_h8_info_to_howto | |
1713 | #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel | |
1714 | ||
1715 | /* So we can set/examine bits in e_flags to get the specific | |
1716 | H8 architecture in use. */ | |
1717 | #define elf_backend_final_write_processing \ | |
1718 | elf32_h8_final_write_processing | |
1719 | #define elf_backend_object_p \ | |
1720 | elf32_h8_object_p | |
1721 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
1722 | elf32_h8_merge_private_bfd_data | |
1723 | ||
1724 | /* ??? when elf_backend_relocate_section is not defined, elf32-target.h | |
1725 | defaults to using _bfd_generic_link_hash_table_create, but | |
1726 | bfd_elf_size_dynamic_sections uses | |
1727 | dynobj = elf_hash_table (info)->dynobj; | |
1728 | and thus requires an elf hash table. */ | |
1729 | #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create | |
1730 | ||
1731 | /* Use an H8 specific linker, not the ELF generic linker. */ | |
1732 | #define elf_backend_relocate_section elf32_h8_relocate_section | |
1733 | #define elf_backend_rela_normal 1 | |
1734 | #define elf_backend_can_gc_sections 1 | |
1735 | ||
1736 | /* And relaxing stuff. */ | |
1737 | #define bfd_elf32_bfd_relax_section elf32_h8_relax_section | |
1738 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
1739 | elf32_h8_get_relocated_section_contents | |
1740 | ||
1741 | #define elf_symbol_leading_char '_' | |
1742 | ||
1743 | #include "elf32-target.h" | |
1744 | ||
1745 | #undef TARGET_BIG_SYM | |
1746 | #define TARGET_BIG_SYM h8300_elf32_linux_vec | |
1747 | #undef TARGET_BIG_NAME | |
1748 | #define TARGET_BIG_NAME "elf32-h8300-linux" | |
1749 | #undef elf_symbol_leading_char | |
1750 | #define elf32_bed elf32_h8300_linux_bed | |
1751 | ||
1752 | #include "elf32-target.h" |