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252b5132 | 1 | /* Hitachi SH specific support for 32-bit ELF |
d4845d57 | 2 | Copyright 1996, 97, 98, 1999, 2000 Free Software Foundation, Inc. |
252b5132 RH |
3 | Contributed by Ian Lance Taylor, Cygnus Support. |
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 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/sh.h" | |
27 | ||
28 | static bfd_reloc_status_type sh_elf_reloc | |
29 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
30 | static bfd_reloc_status_type sh_elf_ignore_reloc | |
31 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
32 | static reloc_howto_type *sh_elf_reloc_type_lookup | |
33 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
34 | static void sh_elf_info_to_howto | |
35 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
d4845d57 JR |
36 | static boolean sh_elf_set_private_flags |
37 | PARAMS ((bfd *, flagword)); | |
38 | static boolean sh_elf_copy_private_data | |
39 | PARAMS ((bfd *, bfd *)); | |
40 | static boolean sh_elf_merge_private_data | |
41 | PARAMS ((bfd *, bfd *)); | |
1630fd2b | 42 | static boolean sh_elf_set_mach_from_flags |
d4845d57 | 43 | PARAMS ((bfd *)); |
252b5132 RH |
44 | static boolean sh_elf_relax_section |
45 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); | |
46 | static boolean sh_elf_relax_delete_bytes | |
47 | PARAMS ((bfd *, asection *, bfd_vma, int)); | |
48 | static boolean sh_elf_align_loads | |
49 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, boolean *)); | |
50 | static boolean sh_elf_swap_insns | |
51 | PARAMS ((bfd *, asection *, PTR, bfd_byte *, bfd_vma)); | |
52 | static boolean sh_elf_relocate_section | |
53 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
54 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
55 | static bfd_byte *sh_elf_get_relocated_section_contents | |
56 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
57 | bfd_byte *, boolean, asymbol **)); | |
58 | ||
59 | static reloc_howto_type sh_elf_howto_table[] = | |
60 | { | |
61 | /* No relocation. */ | |
62 | HOWTO (R_SH_NONE, /* type */ | |
63 | 0, /* rightshift */ | |
64 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
65 | 0, /* bitsize */ | |
66 | false, /* pc_relative */ | |
67 | 0, /* bitpos */ | |
68 | complain_overflow_dont, /* complain_on_overflow */ | |
015551fc | 69 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
70 | "R_SH_NONE", /* name */ |
71 | false, /* partial_inplace */ | |
72 | 0, /* src_mask */ | |
73 | 0, /* dst_mask */ | |
74 | false), /* pcrel_offset */ | |
75 | ||
76 | /* 32 bit absolute relocation. Setting partial_inplace to true and | |
77 | src_mask to a non-zero value is similar to the COFF toolchain. */ | |
78 | HOWTO (R_SH_DIR32, /* type */ | |
79 | 0, /* rightshift */ | |
80 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
81 | 32, /* bitsize */ | |
82 | false, /* pc_relative */ | |
83 | 0, /* bitpos */ | |
84 | complain_overflow_bitfield, /* complain_on_overflow */ | |
85 | sh_elf_reloc, /* special_function */ | |
86 | "R_SH_DIR32", /* name */ | |
87 | true, /* partial_inplace */ | |
88 | 0xffffffff, /* src_mask */ | |
89 | 0xffffffff, /* dst_mask */ | |
90 | false), /* pcrel_offset */ | |
91 | ||
92 | /* 32 bit PC relative relocation. */ | |
93 | HOWTO (R_SH_REL32, /* type */ | |
94 | 0, /* rightshift */ | |
95 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
96 | 32, /* bitsize */ | |
97 | true, /* pc_relative */ | |
98 | 0, /* bitpos */ | |
99 | complain_overflow_signed, /* complain_on_overflow */ | |
015551fc | 100 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
101 | "R_SH_REL32", /* name */ |
102 | false, /* partial_inplace */ | |
103 | 0, /* src_mask */ | |
104 | 0xffffffff, /* dst_mask */ | |
105 | true), /* pcrel_offset */ | |
106 | ||
107 | /* 8 bit PC relative branch divided by 2. */ | |
108 | HOWTO (R_SH_DIR8WPN, /* type */ | |
109 | 1, /* rightshift */ | |
110 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
111 | 8, /* bitsize */ | |
112 | true, /* pc_relative */ | |
113 | 0, /* bitpos */ | |
114 | complain_overflow_signed, /* complain_on_overflow */ | |
015551fc | 115 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
116 | "R_SH_DIR8WPN", /* name */ |
117 | true, /* partial_inplace */ | |
118 | 0xff, /* src_mask */ | |
119 | 0xff, /* dst_mask */ | |
120 | true), /* pcrel_offset */ | |
121 | ||
122 | /* 12 bit PC relative branch divided by 2. */ | |
123 | HOWTO (R_SH_IND12W, /* type */ | |
124 | 1, /* rightshift */ | |
125 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
126 | 12, /* bitsize */ | |
127 | true, /* pc_relative */ | |
128 | 0, /* bitpos */ | |
129 | complain_overflow_signed, /* complain_on_overflow */ | |
130 | sh_elf_reloc, /* special_function */ | |
131 | "R_SH_IND12W", /* name */ | |
132 | true, /* partial_inplace */ | |
133 | 0xfff, /* src_mask */ | |
134 | 0xfff, /* dst_mask */ | |
135 | true), /* pcrel_offset */ | |
136 | ||
137 | /* 8 bit unsigned PC relative divided by 4. */ | |
138 | HOWTO (R_SH_DIR8WPL, /* type */ | |
139 | 2, /* rightshift */ | |
140 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
141 | 8, /* bitsize */ | |
142 | true, /* pc_relative */ | |
143 | 0, /* bitpos */ | |
144 | complain_overflow_unsigned, /* complain_on_overflow */ | |
015551fc | 145 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
146 | "R_SH_DIR8WPL", /* name */ |
147 | true, /* partial_inplace */ | |
148 | 0xff, /* src_mask */ | |
149 | 0xff, /* dst_mask */ | |
150 | true), /* pcrel_offset */ | |
151 | ||
152 | /* 8 bit unsigned PC relative divided by 2. */ | |
153 | HOWTO (R_SH_DIR8WPZ, /* type */ | |
154 | 1, /* rightshift */ | |
155 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
156 | 8, /* bitsize */ | |
157 | true, /* pc_relative */ | |
158 | 0, /* bitpos */ | |
159 | complain_overflow_unsigned, /* complain_on_overflow */ | |
015551fc | 160 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
161 | "R_SH_DIR8WPZ", /* name */ |
162 | true, /* partial_inplace */ | |
163 | 0xff, /* src_mask */ | |
164 | 0xff, /* dst_mask */ | |
165 | true), /* pcrel_offset */ | |
166 | ||
167 | /* 8 bit GBR relative. FIXME: This only makes sense if we have some | |
168 | special symbol for the GBR relative area, and that is not | |
169 | implemented. */ | |
170 | HOWTO (R_SH_DIR8BP, /* type */ | |
171 | 0, /* rightshift */ | |
172 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
173 | 8, /* bitsize */ | |
174 | false, /* pc_relative */ | |
175 | 0, /* bitpos */ | |
176 | complain_overflow_unsigned, /* complain_on_overflow */ | |
015551fc | 177 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
178 | "R_SH_DIR8BP", /* name */ |
179 | false, /* partial_inplace */ | |
180 | 0, /* src_mask */ | |
181 | 0xff, /* dst_mask */ | |
182 | true), /* pcrel_offset */ | |
183 | ||
184 | /* 8 bit GBR relative divided by 2. FIXME: This only makes sense if | |
185 | we have some special symbol for the GBR relative area, and that | |
186 | is not implemented. */ | |
187 | HOWTO (R_SH_DIR8W, /* type */ | |
188 | 1, /* rightshift */ | |
189 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
190 | 8, /* bitsize */ | |
191 | false, /* pc_relative */ | |
192 | 0, /* bitpos */ | |
193 | complain_overflow_unsigned, /* complain_on_overflow */ | |
015551fc | 194 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
195 | "R_SH_DIR8W", /* name */ |
196 | false, /* partial_inplace */ | |
197 | 0, /* src_mask */ | |
198 | 0xff, /* dst_mask */ | |
199 | true), /* pcrel_offset */ | |
200 | ||
201 | /* 8 bit GBR relative divided by 4. FIXME: This only makes sense if | |
202 | we have some special symbol for the GBR relative area, and that | |
203 | is not implemented. */ | |
204 | HOWTO (R_SH_DIR8L, /* type */ | |
205 | 2, /* rightshift */ | |
206 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
207 | 8, /* bitsize */ | |
208 | false, /* pc_relative */ | |
209 | 0, /* bitpos */ | |
210 | complain_overflow_unsigned, /* complain_on_overflow */ | |
015551fc | 211 | sh_elf_ignore_reloc, /* special_function */ |
252b5132 RH |
212 | "R_SH_DIR8L", /* name */ |
213 | false, /* partial_inplace */ | |
214 | 0, /* src_mask */ | |
215 | 0xff, /* dst_mask */ | |
216 | true), /* pcrel_offset */ | |
217 | ||
5f771d47 ILT |
218 | EMPTY_HOWTO (10), |
219 | EMPTY_HOWTO (11), | |
220 | EMPTY_HOWTO (12), | |
221 | EMPTY_HOWTO (13), | |
222 | EMPTY_HOWTO (14), | |
223 | EMPTY_HOWTO (15), | |
224 | EMPTY_HOWTO (16), | |
225 | EMPTY_HOWTO (17), | |
226 | EMPTY_HOWTO (18), | |
227 | EMPTY_HOWTO (19), | |
228 | EMPTY_HOWTO (20), | |
229 | EMPTY_HOWTO (21), | |
230 | EMPTY_HOWTO (22), | |
231 | EMPTY_HOWTO (23), | |
232 | EMPTY_HOWTO (24), | |
252b5132 RH |
233 | |
234 | /* The remaining relocs are a GNU extension used for relaxing. The | |
235 | final pass of the linker never needs to do anything with any of | |
236 | these relocs. Any required operations are handled by the | |
237 | relaxation code. */ | |
238 | ||
239 | /* A 16 bit switch table entry. This is generated for an expression | |
240 | such as ``.word L1 - L2''. The offset holds the difference | |
241 | between the reloc address and L2. */ | |
242 | HOWTO (R_SH_SWITCH16, /* type */ | |
243 | 0, /* rightshift */ | |
244 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
245 | 16, /* bitsize */ | |
246 | false, /* pc_relative */ | |
247 | 0, /* bitpos */ | |
248 | complain_overflow_unsigned, /* complain_on_overflow */ | |
249 | sh_elf_ignore_reloc, /* special_function */ | |
250 | "R_SH_SWITCH16", /* name */ | |
251 | false, /* partial_inplace */ | |
252 | 0, /* src_mask */ | |
253 | 0, /* dst_mask */ | |
254 | true), /* pcrel_offset */ | |
255 | ||
256 | /* A 32 bit switch table entry. This is generated for an expression | |
257 | such as ``.long L1 - L2''. The offset holds the difference | |
258 | between the reloc address and L2. */ | |
259 | HOWTO (R_SH_SWITCH32, /* type */ | |
260 | 0, /* rightshift */ | |
261 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
262 | 32, /* bitsize */ | |
263 | false, /* pc_relative */ | |
264 | 0, /* bitpos */ | |
265 | complain_overflow_unsigned, /* complain_on_overflow */ | |
266 | sh_elf_ignore_reloc, /* special_function */ | |
267 | "R_SH_SWITCH32", /* name */ | |
268 | false, /* partial_inplace */ | |
269 | 0, /* src_mask */ | |
270 | 0, /* dst_mask */ | |
271 | true), /* pcrel_offset */ | |
272 | ||
273 | /* Indicates a .uses pseudo-op. The compiler will generate .uses | |
274 | pseudo-ops when it finds a function call which can be relaxed. | |
275 | The offset field holds the PC relative offset to the instruction | |
276 | which loads the register used in the function call. */ | |
277 | HOWTO (R_SH_USES, /* type */ | |
278 | 0, /* rightshift */ | |
279 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
280 | 0, /* bitsize */ | |
281 | false, /* pc_relative */ | |
282 | 0, /* bitpos */ | |
283 | complain_overflow_unsigned, /* complain_on_overflow */ | |
284 | sh_elf_ignore_reloc, /* special_function */ | |
285 | "R_SH_USES", /* name */ | |
286 | false, /* partial_inplace */ | |
287 | 0, /* src_mask */ | |
288 | 0, /* dst_mask */ | |
289 | true), /* pcrel_offset */ | |
290 | ||
291 | /* The assembler will generate this reloc for addresses referred to | |
292 | by the register loads associated with USES relocs. The offset | |
293 | field holds the number of times the address is referenced in the | |
294 | object file. */ | |
295 | HOWTO (R_SH_COUNT, /* type */ | |
296 | 0, /* rightshift */ | |
297 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
298 | 0, /* bitsize */ | |
299 | false, /* pc_relative */ | |
300 | 0, /* bitpos */ | |
301 | complain_overflow_unsigned, /* complain_on_overflow */ | |
302 | sh_elf_ignore_reloc, /* special_function */ | |
303 | "R_SH_COUNT", /* name */ | |
304 | false, /* partial_inplace */ | |
305 | 0, /* src_mask */ | |
306 | 0, /* dst_mask */ | |
307 | true), /* pcrel_offset */ | |
308 | ||
309 | /* Indicates an alignment statement. The offset field is the power | |
310 | of 2 to which subsequent portions of the object file must be | |
311 | aligned. */ | |
312 | HOWTO (R_SH_ALIGN, /* type */ | |
313 | 0, /* rightshift */ | |
314 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
315 | 0, /* bitsize */ | |
316 | false, /* pc_relative */ | |
317 | 0, /* bitpos */ | |
318 | complain_overflow_unsigned, /* complain_on_overflow */ | |
319 | sh_elf_ignore_reloc, /* special_function */ | |
320 | "R_SH_ALIGN", /* name */ | |
321 | false, /* partial_inplace */ | |
322 | 0, /* src_mask */ | |
323 | 0, /* dst_mask */ | |
324 | true), /* pcrel_offset */ | |
325 | ||
326 | /* The assembler will generate this reloc before a block of | |
327 | instructions. A section should be processed as assumining it | |
328 | contains data, unless this reloc is seen. */ | |
329 | HOWTO (R_SH_CODE, /* type */ | |
330 | 0, /* rightshift */ | |
331 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 0, /* bitsize */ | |
333 | false, /* pc_relative */ | |
334 | 0, /* bitpos */ | |
335 | complain_overflow_unsigned, /* complain_on_overflow */ | |
336 | sh_elf_ignore_reloc, /* special_function */ | |
337 | "R_SH_CODE", /* name */ | |
338 | false, /* partial_inplace */ | |
339 | 0, /* src_mask */ | |
340 | 0, /* dst_mask */ | |
341 | true), /* pcrel_offset */ | |
342 | ||
343 | /* The assembler will generate this reloc after a block of | |
344 | instructions when it sees data that is not instructions. */ | |
345 | HOWTO (R_SH_DATA, /* type */ | |
346 | 0, /* rightshift */ | |
347 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 0, /* bitsize */ | |
349 | false, /* pc_relative */ | |
350 | 0, /* bitpos */ | |
351 | complain_overflow_unsigned, /* complain_on_overflow */ | |
352 | sh_elf_ignore_reloc, /* special_function */ | |
353 | "R_SH_DATA", /* name */ | |
354 | false, /* partial_inplace */ | |
355 | 0, /* src_mask */ | |
356 | 0, /* dst_mask */ | |
357 | true), /* pcrel_offset */ | |
358 | ||
359 | /* The assembler generates this reloc for each label within a block | |
360 | of instructions. This permits the linker to avoid swapping | |
361 | instructions which are the targets of branches. */ | |
362 | HOWTO (R_SH_LABEL, /* type */ | |
363 | 0, /* rightshift */ | |
364 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
365 | 0, /* bitsize */ | |
366 | false, /* pc_relative */ | |
367 | 0, /* bitpos */ | |
368 | complain_overflow_unsigned, /* complain_on_overflow */ | |
369 | sh_elf_ignore_reloc, /* special_function */ | |
370 | "R_SH_LABEL", /* name */ | |
371 | false, /* partial_inplace */ | |
372 | 0, /* src_mask */ | |
373 | 0, /* dst_mask */ | |
374 | true), /* pcrel_offset */ | |
375 | ||
376 | /* An 8 bit switch table entry. This is generated for an expression | |
377 | such as ``.word L1 - L2''. The offset holds the difference | |
378 | between the reloc address and L2. */ | |
379 | HOWTO (R_SH_SWITCH8, /* type */ | |
380 | 0, /* rightshift */ | |
381 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
382 | 8, /* bitsize */ | |
383 | false, /* pc_relative */ | |
384 | 0, /* bitpos */ | |
385 | complain_overflow_unsigned, /* complain_on_overflow */ | |
386 | sh_elf_ignore_reloc, /* special_function */ | |
387 | "R_SH_SWITCH8", /* name */ | |
388 | false, /* partial_inplace */ | |
389 | 0, /* src_mask */ | |
390 | 0, /* dst_mask */ | |
391 | true), /* pcrel_offset */ | |
392 | ||
393 | /* GNU extension to record C++ vtable hierarchy */ | |
394 | HOWTO (R_SH_GNU_VTINHERIT, /* type */ | |
395 | 0, /* rightshift */ | |
396 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
397 | 0, /* bitsize */ | |
398 | false, /* pc_relative */ | |
399 | 0, /* bitpos */ | |
400 | complain_overflow_dont, /* complain_on_overflow */ | |
401 | NULL, /* special_function */ | |
402 | "R_SH_GNU_VTINHERIT", /* name */ | |
403 | false, /* partial_inplace */ | |
404 | 0, /* src_mask */ | |
405 | 0, /* dst_mask */ | |
406 | false), /* pcrel_offset */ | |
407 | ||
408 | /* GNU extension to record C++ vtable member usage */ | |
409 | HOWTO (R_SH_GNU_VTENTRY, /* type */ | |
410 | 0, /* rightshift */ | |
411 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
412 | 0, /* bitsize */ | |
413 | false, /* pc_relative */ | |
414 | 0, /* bitpos */ | |
415 | complain_overflow_dont, /* complain_on_overflow */ | |
416 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
417 | "R_SH_GNU_VTENTRY", /* name */ | |
418 | false, /* partial_inplace */ | |
419 | 0, /* src_mask */ | |
420 | 0, /* dst_mask */ | |
421 | false), /* pcrel_offset */ | |
422 | ||
015551fc JR |
423 | /* 8 bit PC relative divided by 2 - but specified in a very odd way. */ |
424 | HOWTO (R_SH_LOOP_START, /* type */ | |
425 | 1, /* rightshift */ | |
426 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
427 | 8, /* bitsize */ | |
428 | false, /* pc_relative */ | |
429 | 0, /* bitpos */ | |
430 | complain_overflow_signed, /* complain_on_overflow */ | |
431 | sh_elf_ignore_reloc, /* special_function */ | |
432 | "R_SH_LOOP_START", /* name */ | |
433 | true, /* partial_inplace */ | |
434 | 0xff, /* src_mask */ | |
435 | 0xff, /* dst_mask */ | |
436 | true), /* pcrel_offset */ | |
437 | ||
438 | /* 8 bit PC relative divided by 2 - but specified in a very odd way. */ | |
439 | HOWTO (R_SH_LOOP_END, /* type */ | |
440 | 1, /* rightshift */ | |
441 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
442 | 8, /* bitsize */ | |
443 | false, /* pc_relative */ | |
444 | 0, /* bitpos */ | |
445 | complain_overflow_signed, /* complain_on_overflow */ | |
446 | sh_elf_ignore_reloc, /* special_function */ | |
447 | "R_SH_LOOP_END", /* name */ | |
448 | true, /* partial_inplace */ | |
449 | 0xff, /* src_mask */ | |
450 | 0xff, /* dst_mask */ | |
451 | true), /* pcrel_offset */ | |
452 | ||
252b5132 RH |
453 | }; |
454 | ||
015551fc JR |
455 | static bfd_reloc_status_type |
456 | sh_elf_reloc_loop (r_type, input_bfd, input_section, contents, addr, | |
457 | symbol_section, start, end) | |
61ff1804 | 458 | int r_type ATTRIBUTE_UNUSED; |
015551fc JR |
459 | bfd *input_bfd; |
460 | asection *input_section; | |
461 | bfd_byte *contents; | |
462 | bfd_vma addr; | |
463 | asection *symbol_section; | |
464 | bfd_vma start, end; | |
465 | { | |
466 | static bfd_vma last_addr; | |
00fdaf47 | 467 | static asection *last_symbol_section; |
015551fc JR |
468 | bfd_byte *free_contents = NULL; |
469 | bfd_byte *start_ptr, *ptr, *last_ptr; | |
470 | int diff, cum_diff; | |
471 | bfd_signed_vma x; | |
472 | int insn; | |
473 | ||
474 | /* Sanity check the address. */ | |
475 | if (addr > input_section->_raw_size) | |
476 | return bfd_reloc_outofrange; | |
477 | ||
478 | /* We require the start and end relocations to be processed consecutively - | |
479 | although we allow then to be processed forwards or backwards. */ | |
480 | if (! last_addr) | |
481 | { | |
482 | last_addr = addr; | |
483 | last_symbol_section = symbol_section; | |
484 | return bfd_reloc_ok; | |
485 | } | |
486 | if (last_addr != addr) | |
487 | abort (); | |
488 | last_addr = 0; | |
489 | ||
490 | if (! symbol_section || last_symbol_section != symbol_section || end < start) | |
491 | return bfd_reloc_outofrange; | |
492 | ||
493 | /* Get the symbol_section contents. */ | |
494 | if (symbol_section != input_section) | |
495 | { | |
496 | if (elf_section_data (symbol_section)->this_hdr.contents != NULL) | |
497 | contents = elf_section_data (symbol_section)->this_hdr.contents; | |
498 | else | |
499 | { | |
500 | free_contents = contents | |
501 | = (bfd_byte *) bfd_malloc (symbol_section->_raw_size); | |
502 | if (contents == NULL) | |
503 | return bfd_reloc_outofrange; | |
504 | if (! bfd_get_section_contents (input_bfd, symbol_section, contents, | |
505 | (file_ptr) 0, | |
506 | symbol_section->_raw_size)) | |
507 | { | |
508 | free (contents); | |
509 | return bfd_reloc_outofrange; | |
510 | } | |
511 | } | |
512 | } | |
513 | #define IS_PPI(PTR) ((bfd_get_16 (input_bfd, (PTR)) & 0xfc00) == 0xf800) | |
514 | start_ptr = contents + start; | |
515 | for (cum_diff = -6, ptr = contents + end; cum_diff < 0 && ptr > start_ptr;) | |
516 | { | |
517 | for (last_ptr = ptr, ptr -= 4; ptr >= start_ptr && IS_PPI (ptr);) | |
518 | ptr -= 2; | |
519 | ptr += 2; | |
61ff1804 | 520 | diff = (last_ptr - ptr) >> 1; |
015551fc JR |
521 | cum_diff += diff & 1; |
522 | cum_diff += diff; | |
523 | } | |
524 | /* Calculate the start / end values to load into rs / re minus four - | |
525 | so that will cancel out the four we would otherwise have to add to | |
526 | addr to get the value to subtract in order to get relative addressing. */ | |
527 | if (cum_diff >= 0) | |
528 | { | |
529 | start -= 4; | |
530 | end = (ptr + cum_diff * 2) - contents; | |
531 | } | |
532 | else | |
533 | { | |
534 | bfd_vma start0 = start - 4; | |
535 | ||
536 | while (start0 >= 0 && IS_PPI (contents + start0)) | |
537 | start0 -= 2; | |
538 | start0 = start - 2 - ((start - start0) & 2); | |
539 | start = start0 - cum_diff - 2; | |
540 | end = start0; | |
541 | } | |
542 | ||
543 | if (free_contents) | |
544 | free (free_contents); | |
545 | ||
546 | insn = bfd_get_16 (input_bfd, contents + addr); | |
547 | ||
548 | x = (insn & 0x200 ? end : start) - addr; | |
549 | if (input_section != symbol_section) | |
550 | x += ((symbol_section->output_section->vma + symbol_section->output_offset) | |
551 | - (input_section->output_section->vma | |
552 | + input_section->output_offset)); | |
553 | x >>= 1; | |
554 | if (x < -128 || x > 127) | |
555 | return bfd_reloc_overflow; | |
556 | ||
61ff1804 | 557 | x = (insn & ~0xff) | (x & 0xff); |
015551fc JR |
558 | bfd_put_16 (input_bfd, x, contents + addr); |
559 | ||
560 | return bfd_reloc_ok; | |
561 | } | |
562 | ||
563 | /* This function is used for normal relocs. This used to be like the COFF | |
252b5132 RH |
564 | function, and is almost certainly incorrect for other ELF targets. */ |
565 | ||
566 | static bfd_reloc_status_type | |
567 | sh_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, | |
568 | error_message) | |
569 | bfd *abfd; | |
570 | arelent *reloc_entry; | |
571 | asymbol *symbol_in; | |
572 | PTR data; | |
573 | asection *input_section; | |
574 | bfd *output_bfd; | |
5f771d47 | 575 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
576 | { |
577 | unsigned long insn; | |
578 | bfd_vma sym_value; | |
579 | enum elf_sh_reloc_type r_type; | |
580 | bfd_vma addr = reloc_entry->address; | |
581 | bfd_byte *hit_data = addr + (bfd_byte *) data; | |
582 | ||
583 | r_type = (enum elf_sh_reloc_type) reloc_entry->howto->type; | |
584 | ||
585 | if (output_bfd != NULL) | |
586 | { | |
587 | /* Partial linking--do nothing. */ | |
588 | reloc_entry->address += input_section->output_offset; | |
589 | return bfd_reloc_ok; | |
590 | } | |
591 | ||
592 | /* Almost all relocs have to do with relaxing. If any work must be | |
593 | done for them, it has been done in sh_relax_section. */ | |
015551fc | 594 | if (r_type == R_SH_IND12W && (symbol_in->flags & BSF_LOCAL) != 0) |
252b5132 RH |
595 | return bfd_reloc_ok; |
596 | ||
597 | if (symbol_in != NULL | |
598 | && bfd_is_und_section (symbol_in->section)) | |
599 | return bfd_reloc_undefined; | |
600 | ||
601 | if (bfd_is_com_section (symbol_in->section)) | |
602 | sym_value = 0; | |
603 | else | |
604 | sym_value = (symbol_in->value + | |
605 | symbol_in->section->output_section->vma + | |
606 | symbol_in->section->output_offset); | |
607 | ||
608 | switch (r_type) | |
609 | { | |
610 | case R_SH_DIR32: | |
611 | insn = bfd_get_32 (abfd, hit_data); | |
612 | insn += sym_value + reloc_entry->addend; | |
613 | bfd_put_32 (abfd, insn, hit_data); | |
614 | break; | |
615 | case R_SH_IND12W: | |
616 | insn = bfd_get_16 (abfd, hit_data); | |
617 | sym_value += reloc_entry->addend; | |
618 | sym_value -= (input_section->output_section->vma | |
619 | + input_section->output_offset | |
620 | + addr | |
621 | + 4); | |
622 | sym_value += (insn & 0xfff) << 1; | |
623 | if (insn & 0x800) | |
624 | sym_value -= 0x1000; | |
625 | insn = (insn & 0xf000) | (sym_value & 0xfff); | |
626 | bfd_put_16 (abfd, insn, hit_data); | |
627 | if (sym_value < (bfd_vma) -0x1000 || sym_value >= 0x1000) | |
628 | return bfd_reloc_overflow; | |
629 | break; | |
630 | default: | |
631 | abort (); | |
632 | break; | |
633 | } | |
634 | ||
635 | return bfd_reloc_ok; | |
636 | } | |
637 | ||
638 | /* This function is used for relocs which are only used for relaxing, | |
639 | which the linker should otherwise ignore. */ | |
640 | ||
641 | static bfd_reloc_status_type | |
642 | sh_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, | |
643 | output_bfd, error_message) | |
5f771d47 | 644 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 645 | arelent *reloc_entry; |
5f771d47 ILT |
646 | asymbol *symbol ATTRIBUTE_UNUSED; |
647 | PTR data ATTRIBUTE_UNUSED; | |
252b5132 RH |
648 | asection *input_section; |
649 | bfd *output_bfd; | |
5f771d47 | 650 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
651 | { |
652 | if (output_bfd != NULL) | |
653 | reloc_entry->address += input_section->output_offset; | |
654 | return bfd_reloc_ok; | |
655 | } | |
656 | ||
657 | /* This structure is used to map BFD reloc codes to SH ELF relocs. */ | |
658 | ||
659 | struct elf_reloc_map | |
660 | { | |
661 | bfd_reloc_code_real_type bfd_reloc_val; | |
662 | unsigned char elf_reloc_val; | |
663 | }; | |
664 | ||
665 | /* An array mapping BFD reloc codes to SH ELF relocs. */ | |
666 | ||
667 | static const struct elf_reloc_map sh_reloc_map[] = | |
668 | { | |
669 | { BFD_RELOC_NONE, R_SH_NONE }, | |
670 | { BFD_RELOC_32, R_SH_DIR32 }, | |
671 | { BFD_RELOC_CTOR, R_SH_DIR32 }, | |
672 | { BFD_RELOC_32_PCREL, R_SH_REL32 }, | |
673 | { BFD_RELOC_SH_PCDISP8BY2, R_SH_DIR8WPN }, | |
674 | { BFD_RELOC_SH_PCDISP12BY2, R_SH_IND12W }, | |
675 | { BFD_RELOC_SH_PCRELIMM8BY2, R_SH_DIR8WPZ }, | |
676 | { BFD_RELOC_SH_PCRELIMM8BY4, R_SH_DIR8WPL }, | |
677 | { BFD_RELOC_8_PCREL, R_SH_SWITCH8 }, | |
678 | { BFD_RELOC_SH_SWITCH16, R_SH_SWITCH16 }, | |
679 | { BFD_RELOC_SH_SWITCH32, R_SH_SWITCH32 }, | |
680 | { BFD_RELOC_SH_USES, R_SH_USES }, | |
681 | { BFD_RELOC_SH_COUNT, R_SH_COUNT }, | |
682 | { BFD_RELOC_SH_ALIGN, R_SH_ALIGN }, | |
683 | { BFD_RELOC_SH_CODE, R_SH_CODE }, | |
684 | { BFD_RELOC_SH_DATA, R_SH_DATA }, | |
685 | { BFD_RELOC_SH_LABEL, R_SH_LABEL }, | |
686 | { BFD_RELOC_VTABLE_INHERIT, R_SH_GNU_VTINHERIT }, | |
687 | { BFD_RELOC_VTABLE_ENTRY, R_SH_GNU_VTENTRY }, | |
015551fc JR |
688 | { BFD_RELOC_SH_LOOP_START, R_SH_LOOP_START }, |
689 | { BFD_RELOC_SH_LOOP_END, R_SH_LOOP_END }, | |
252b5132 RH |
690 | }; |
691 | ||
692 | /* Given a BFD reloc code, return the howto structure for the | |
693 | corresponding SH ELf reloc. */ | |
694 | ||
695 | static reloc_howto_type * | |
696 | sh_elf_reloc_type_lookup (abfd, code) | |
5f771d47 | 697 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
698 | bfd_reloc_code_real_type code; |
699 | { | |
700 | unsigned int i; | |
701 | ||
702 | for (i = 0; i < sizeof (sh_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
703 | { | |
704 | if (sh_reloc_map[i].bfd_reloc_val == code) | |
705 | return &sh_elf_howto_table[(int) sh_reloc_map[i].elf_reloc_val]; | |
706 | } | |
707 | ||
708 | return NULL; | |
709 | } | |
710 | ||
711 | /* Given an ELF reloc, fill in the howto field of a relent. */ | |
712 | ||
713 | static void | |
714 | sh_elf_info_to_howto (abfd, cache_ptr, dst) | |
5f771d47 | 715 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
716 | arelent *cache_ptr; |
717 | Elf_Internal_Rela *dst; | |
718 | { | |
719 | unsigned int r; | |
720 | ||
721 | r = ELF32_R_TYPE (dst->r_info); | |
722 | ||
723 | BFD_ASSERT (r < (unsigned int) R_SH_max); | |
724 | BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC || r > R_SH_LAST_INVALID_RELOC); | |
725 | ||
726 | cache_ptr->howto = &sh_elf_howto_table[r]; | |
727 | } | |
728 | \f | |
729 | /* This function handles relaxing for SH ELF. See the corresponding | |
730 | function in coff-sh.c for a description of what this does. FIXME: | |
731 | There is a lot of duplication here between this code and the COFF | |
732 | specific code. The format of relocs and symbols is wound deeply | |
733 | into this code, but it would still be better if the duplication | |
734 | could be eliminated somehow. Note in particular that although both | |
735 | functions use symbols like R_SH_CODE, those symbols have different | |
736 | values; in coff-sh.c they come from include/coff/sh.h, whereas here | |
737 | they come from enum elf_sh_reloc_type in include/elf/sh.h. */ | |
738 | ||
739 | static boolean | |
740 | sh_elf_relax_section (abfd, sec, link_info, again) | |
741 | bfd *abfd; | |
742 | asection *sec; | |
743 | struct bfd_link_info *link_info; | |
744 | boolean *again; | |
745 | { | |
746 | Elf_Internal_Shdr *symtab_hdr; | |
747 | Elf_Internal_Rela *internal_relocs; | |
748 | Elf_Internal_Rela *free_relocs = NULL; | |
749 | boolean have_code; | |
750 | Elf_Internal_Rela *irel, *irelend; | |
751 | bfd_byte *contents = NULL; | |
752 | bfd_byte *free_contents = NULL; | |
753 | Elf32_External_Sym *extsyms = NULL; | |
754 | Elf32_External_Sym *free_extsyms = NULL; | |
755 | ||
756 | *again = false; | |
757 | ||
758 | if (link_info->relocateable | |
759 | || (sec->flags & SEC_RELOC) == 0 | |
760 | || sec->reloc_count == 0) | |
761 | return true; | |
762 | ||
763 | /* If this is the first time we have been called for this section, | |
764 | initialize the cooked size. */ | |
765 | if (sec->_cooked_size == 0) | |
766 | sec->_cooked_size = sec->_raw_size; | |
767 | ||
768 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
769 | ||
770 | internal_relocs = (_bfd_elf32_link_read_relocs | |
771 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
772 | link_info->keep_memory)); | |
773 | if (internal_relocs == NULL) | |
774 | goto error_return; | |
775 | if (! link_info->keep_memory) | |
776 | free_relocs = internal_relocs; | |
777 | ||
778 | have_code = false; | |
779 | ||
780 | irelend = internal_relocs + sec->reloc_count; | |
781 | for (irel = internal_relocs; irel < irelend; irel++) | |
782 | { | |
783 | bfd_vma laddr, paddr, symval; | |
784 | unsigned short insn; | |
785 | Elf_Internal_Rela *irelfn, *irelscan, *irelcount; | |
786 | bfd_signed_vma foff; | |
787 | ||
788 | if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_CODE) | |
789 | have_code = true; | |
790 | ||
791 | if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_USES) | |
792 | continue; | |
793 | ||
794 | /* Get the section contents. */ | |
795 | if (contents == NULL) | |
796 | { | |
797 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
798 | contents = elf_section_data (sec)->this_hdr.contents; | |
799 | else | |
800 | { | |
801 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
802 | if (contents == NULL) | |
803 | goto error_return; | |
804 | free_contents = contents; | |
805 | ||
806 | if (! bfd_get_section_contents (abfd, sec, contents, | |
807 | (file_ptr) 0, sec->_raw_size)) | |
808 | goto error_return; | |
809 | } | |
810 | } | |
811 | ||
812 | /* The r_addend field of the R_SH_USES reloc will point us to | |
813 | the register load. The 4 is because the r_addend field is | |
814 | computed as though it were a jump offset, which are based | |
815 | from 4 bytes after the jump instruction. */ | |
816 | laddr = irel->r_offset + 4 + irel->r_addend; | |
817 | if (laddr >= sec->_raw_size) | |
818 | { | |
819 | (*_bfd_error_handler) (_("%s: 0x%lx: warning: bad R_SH_USES offset"), | |
820 | bfd_get_filename (abfd), | |
821 | (unsigned long) irel->r_offset); | |
822 | continue; | |
823 | } | |
824 | insn = bfd_get_16 (abfd, contents + laddr); | |
825 | ||
826 | /* If the instruction is not mov.l NN,rN, we don't know what to | |
827 | do. */ | |
828 | if ((insn & 0xf000) != 0xd000) | |
829 | { | |
830 | ((*_bfd_error_handler) | |
831 | (_("%s: 0x%lx: warning: R_SH_USES points to unrecognized insn 0x%x"), | |
832 | bfd_get_filename (abfd), (unsigned long) irel->r_offset, insn)); | |
833 | continue; | |
834 | } | |
835 | ||
836 | /* Get the address from which the register is being loaded. The | |
837 | displacement in the mov.l instruction is quadrupled. It is a | |
838 | displacement from four bytes after the movl instruction, but, | |
839 | before adding in the PC address, two least significant bits | |
840 | of the PC are cleared. We assume that the section is aligned | |
841 | on a four byte boundary. */ | |
842 | paddr = insn & 0xff; | |
843 | paddr *= 4; | |
844 | paddr += (laddr + 4) &~ 3; | |
845 | if (paddr >= sec->_raw_size) | |
846 | { | |
847 | ((*_bfd_error_handler) | |
848 | (_("%s: 0x%lx: warning: bad R_SH_USES load offset"), | |
849 | bfd_get_filename (abfd), (unsigned long) irel->r_offset)); | |
850 | continue; | |
851 | } | |
852 | ||
853 | /* Get the reloc for the address from which the register is | |
854 | being loaded. This reloc will tell us which function is | |
855 | actually being called. */ | |
856 | for (irelfn = internal_relocs; irelfn < irelend; irelfn++) | |
857 | if (irelfn->r_offset == paddr | |
858 | && ELF32_R_TYPE (irelfn->r_info) == (int) R_SH_DIR32) | |
859 | break; | |
860 | if (irelfn >= irelend) | |
861 | { | |
862 | ((*_bfd_error_handler) | |
863 | (_("%s: 0x%lx: warning: could not find expected reloc"), | |
864 | bfd_get_filename (abfd), (unsigned long) paddr)); | |
865 | continue; | |
866 | } | |
867 | ||
868 | /* Read this BFD's symbols if we haven't done so already. */ | |
869 | if (extsyms == NULL) | |
870 | { | |
871 | if (symtab_hdr->contents != NULL) | |
872 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
873 | else | |
874 | { | |
875 | extsyms = ((Elf32_External_Sym *) | |
876 | bfd_malloc (symtab_hdr->sh_size)); | |
877 | if (extsyms == NULL) | |
878 | goto error_return; | |
879 | free_extsyms = extsyms; | |
880 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
881 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) | |
882 | != symtab_hdr->sh_size)) | |
883 | goto error_return; | |
884 | } | |
885 | } | |
886 | ||
887 | /* Get the value of the symbol referred to by the reloc. */ | |
888 | if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info) | |
889 | { | |
890 | Elf_Internal_Sym isym; | |
891 | ||
892 | /* A local symbol. */ | |
893 | bfd_elf32_swap_symbol_in (abfd, | |
894 | extsyms + ELF32_R_SYM (irelfn->r_info), | |
895 | &isym); | |
896 | ||
897 | if (isym.st_shndx != _bfd_elf_section_from_bfd_section (abfd, sec)) | |
898 | { | |
899 | ((*_bfd_error_handler) | |
900 | (_("%s: 0x%lx: warning: symbol in unexpected section"), | |
901 | bfd_get_filename (abfd), (unsigned long) paddr)); | |
902 | continue; | |
903 | } | |
904 | ||
905 | symval = (isym.st_value | |
906 | + sec->output_section->vma | |
907 | + sec->output_offset); | |
908 | } | |
909 | else | |
910 | { | |
911 | unsigned long indx; | |
912 | struct elf_link_hash_entry *h; | |
913 | ||
914 | indx = ELF32_R_SYM (irelfn->r_info) - symtab_hdr->sh_info; | |
915 | h = elf_sym_hashes (abfd)[indx]; | |
916 | BFD_ASSERT (h != NULL); | |
917 | if (h->root.type != bfd_link_hash_defined | |
918 | && h->root.type != bfd_link_hash_defweak) | |
919 | { | |
920 | /* This appears to be a reference to an undefined | |
921 | symbol. Just ignore it--it will be caught by the | |
922 | regular reloc processing. */ | |
923 | continue; | |
924 | } | |
925 | ||
926 | symval = (h->root.u.def.value | |
927 | + h->root.u.def.section->output_section->vma | |
928 | + h->root.u.def.section->output_offset); | |
929 | } | |
930 | ||
931 | symval += bfd_get_32 (abfd, contents + paddr); | |
932 | ||
933 | /* See if this function call can be shortened. */ | |
934 | foff = (symval | |
935 | - (irel->r_offset | |
936 | + sec->output_section->vma | |
937 | + sec->output_offset | |
938 | + 4)); | |
939 | if (foff < -0x1000 || foff >= 0x1000) | |
940 | { | |
941 | /* After all that work, we can't shorten this function call. */ | |
942 | continue; | |
943 | } | |
944 | ||
945 | /* Shorten the function call. */ | |
946 | ||
947 | /* For simplicity of coding, we are going to modify the section | |
948 | contents, the section relocs, and the BFD symbol table. We | |
949 | must tell the rest of the code not to free up this | |
950 | information. It would be possible to instead create a table | |
951 | of changes which have to be made, as is done in coff-mips.c; | |
952 | that would be more work, but would require less memory when | |
953 | the linker is run. */ | |
954 | ||
955 | elf_section_data (sec)->relocs = internal_relocs; | |
956 | free_relocs = NULL; | |
957 | ||
958 | elf_section_data (sec)->this_hdr.contents = contents; | |
959 | free_contents = NULL; | |
960 | ||
961 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
962 | free_extsyms = NULL; | |
963 | ||
964 | /* Replace the jsr with a bsr. */ | |
965 | ||
966 | /* Change the R_SH_USES reloc into an R_SH_IND12W reloc, and | |
967 | replace the jsr with a bsr. */ | |
968 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irelfn->r_info), R_SH_IND12W); | |
969 | if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info) | |
970 | { | |
971 | /* If this needs to be changed because of future relaxing, | |
972 | it will be handled here like other internal IND12W | |
973 | relocs. */ | |
974 | bfd_put_16 (abfd, | |
975 | 0xb000 | ((foff >> 1) & 0xfff), | |
976 | contents + irel->r_offset); | |
977 | } | |
978 | else | |
979 | { | |
980 | /* We can't fully resolve this yet, because the external | |
981 | symbol value may be changed by future relaxing. We let | |
982 | the final link phase handle it. */ | |
983 | bfd_put_16 (abfd, 0xb000, contents + irel->r_offset); | |
984 | } | |
985 | ||
986 | /* See if there is another R_SH_USES reloc referring to the same | |
987 | register load. */ | |
988 | for (irelscan = internal_relocs; irelscan < irelend; irelscan++) | |
989 | if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_USES | |
990 | && laddr == irelscan->r_offset + 4 + irelscan->r_addend) | |
991 | break; | |
992 | if (irelscan < irelend) | |
993 | { | |
994 | /* Some other function call depends upon this register load, | |
995 | and we have not yet converted that function call. | |
996 | Indeed, we may never be able to convert it. There is | |
997 | nothing else we can do at this point. */ | |
998 | continue; | |
999 | } | |
1000 | ||
1001 | /* Look for a R_SH_COUNT reloc on the location where the | |
1002 | function address is stored. Do this before deleting any | |
1003 | bytes, to avoid confusion about the address. */ | |
1004 | for (irelcount = internal_relocs; irelcount < irelend; irelcount++) | |
1005 | if (irelcount->r_offset == paddr | |
1006 | && ELF32_R_TYPE (irelcount->r_info) == (int) R_SH_COUNT) | |
1007 | break; | |
1008 | ||
1009 | /* Delete the register load. */ | |
1010 | if (! sh_elf_relax_delete_bytes (abfd, sec, laddr, 2)) | |
1011 | goto error_return; | |
1012 | ||
1013 | /* That will change things, so, just in case it permits some | |
1014 | other function call to come within range, we should relax | |
1015 | again. Note that this is not required, and it may be slow. */ | |
1016 | *again = true; | |
1017 | ||
1018 | /* Now check whether we got a COUNT reloc. */ | |
1019 | if (irelcount >= irelend) | |
1020 | { | |
1021 | ((*_bfd_error_handler) | |
1022 | (_("%s: 0x%lx: warning: could not find expected COUNT reloc"), | |
1023 | bfd_get_filename (abfd), (unsigned long) paddr)); | |
1024 | continue; | |
1025 | } | |
1026 | ||
1027 | /* The number of uses is stored in the r_addend field. We've | |
1028 | just deleted one. */ | |
1029 | if (irelcount->r_addend == 0) | |
1030 | { | |
1031 | ((*_bfd_error_handler) (_("%s: 0x%lx: warning: bad count"), | |
1032 | bfd_get_filename (abfd), | |
1033 | (unsigned long) paddr)); | |
1034 | continue; | |
1035 | } | |
1036 | ||
1037 | --irelcount->r_addend; | |
1038 | ||
1039 | /* If there are no more uses, we can delete the address. Reload | |
1040 | the address from irelfn, in case it was changed by the | |
1041 | previous call to sh_elf_relax_delete_bytes. */ | |
1042 | if (irelcount->r_addend == 0) | |
1043 | { | |
1044 | if (! sh_elf_relax_delete_bytes (abfd, sec, irelfn->r_offset, 4)) | |
1045 | goto error_return; | |
1046 | } | |
1047 | ||
1048 | /* We've done all we can with that function call. */ | |
1049 | } | |
1050 | ||
1051 | /* Look for load and store instructions that we can align on four | |
1052 | byte boundaries. */ | |
1053 | if (have_code) | |
1054 | { | |
1055 | boolean swapped; | |
1056 | ||
1057 | /* Get the section contents. */ | |
1058 | if (contents == NULL) | |
1059 | { | |
1060 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1061 | contents = elf_section_data (sec)->this_hdr.contents; | |
1062 | else | |
1063 | { | |
1064 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
1065 | if (contents == NULL) | |
1066 | goto error_return; | |
1067 | free_contents = contents; | |
1068 | ||
1069 | if (! bfd_get_section_contents (abfd, sec, contents, | |
1070 | (file_ptr) 0, sec->_raw_size)) | |
1071 | goto error_return; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (! sh_elf_align_loads (abfd, sec, internal_relocs, contents, | |
1076 | &swapped)) | |
1077 | goto error_return; | |
1078 | ||
1079 | if (swapped) | |
1080 | { | |
1081 | elf_section_data (sec)->relocs = internal_relocs; | |
1082 | free_relocs = NULL; | |
1083 | ||
1084 | elf_section_data (sec)->this_hdr.contents = contents; | |
1085 | free_contents = NULL; | |
1086 | ||
1087 | symtab_hdr->contents = (bfd_byte *) extsyms; | |
1088 | free_extsyms = NULL; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | if (free_relocs != NULL) | |
1093 | { | |
1094 | free (free_relocs); | |
1095 | free_relocs = NULL; | |
1096 | } | |
1097 | ||
1098 | if (free_contents != NULL) | |
1099 | { | |
1100 | if (! link_info->keep_memory) | |
1101 | free (free_contents); | |
1102 | else | |
1103 | { | |
1104 | /* Cache the section contents for elf_link_input_bfd. */ | |
1105 | elf_section_data (sec)->this_hdr.contents = contents; | |
1106 | } | |
1107 | free_contents = NULL; | |
1108 | } | |
1109 | ||
1110 | if (free_extsyms != NULL) | |
1111 | { | |
1112 | if (! link_info->keep_memory) | |
1113 | free (free_extsyms); | |
1114 | else | |
1115 | { | |
1116 | /* Cache the symbols for elf_link_input_bfd. */ | |
1117 | symtab_hdr->contents = extsyms; | |
1118 | } | |
1119 | free_extsyms = NULL; | |
1120 | } | |
1121 | ||
1122 | return true; | |
1123 | ||
1124 | error_return: | |
1125 | if (free_relocs != NULL) | |
1126 | free (free_relocs); | |
1127 | if (free_contents != NULL) | |
1128 | free (free_contents); | |
1129 | if (free_extsyms != NULL) | |
1130 | free (free_extsyms); | |
1131 | return false; | |
1132 | } | |
1133 | ||
1134 | /* Delete some bytes from a section while relaxing. FIXME: There is a | |
1135 | lot of duplication between this function and sh_relax_delete_bytes | |
1136 | in coff-sh.c. */ | |
1137 | ||
1138 | static boolean | |
1139 | sh_elf_relax_delete_bytes (abfd, sec, addr, count) | |
1140 | bfd *abfd; | |
1141 | asection *sec; | |
1142 | bfd_vma addr; | |
1143 | int count; | |
1144 | { | |
1145 | Elf_Internal_Shdr *symtab_hdr; | |
1146 | Elf32_External_Sym *extsyms; | |
1147 | int shndx, index; | |
1148 | bfd_byte *contents; | |
1149 | Elf_Internal_Rela *irel, *irelend; | |
1150 | Elf_Internal_Rela *irelalign; | |
1151 | bfd_vma toaddr; | |
1152 | Elf32_External_Sym *esym, *esymend; | |
1153 | struct elf_link_hash_entry *sym_hash; | |
1154 | asection *o; | |
1155 | ||
1156 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1157 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
1158 | ||
1159 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1160 | ||
1161 | contents = elf_section_data (sec)->this_hdr.contents; | |
1162 | ||
1163 | /* The deletion must stop at the next ALIGN reloc for an aligment | |
1164 | power larger than the number of bytes we are deleting. */ | |
1165 | ||
1166 | irelalign = NULL; | |
1167 | toaddr = sec->_cooked_size; | |
1168 | ||
1169 | irel = elf_section_data (sec)->relocs; | |
1170 | irelend = irel + sec->reloc_count; | |
1171 | for (; irel < irelend; irel++) | |
1172 | { | |
1173 | if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN | |
1174 | && irel->r_offset > addr | |
1175 | && count < (1 << irel->r_addend)) | |
1176 | { | |
1177 | irelalign = irel; | |
1178 | toaddr = irel->r_offset; | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | /* Actually delete the bytes. */ | |
1184 | memmove (contents + addr, contents + addr + count, toaddr - addr - count); | |
1185 | if (irelalign == NULL) | |
1186 | sec->_cooked_size -= count; | |
1187 | else | |
1188 | { | |
1189 | int i; | |
1190 | ||
1191 | #define NOP_OPCODE (0x0009) | |
1192 | ||
1193 | BFD_ASSERT ((count & 1) == 0); | |
1194 | for (i = 0; i < count; i += 2) | |
1195 | bfd_put_16 (abfd, NOP_OPCODE, contents + toaddr - count + i); | |
1196 | } | |
1197 | ||
1198 | /* Adjust all the relocs. */ | |
1199 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) | |
1200 | { | |
1201 | bfd_vma nraddr, stop; | |
1202 | bfd_vma start = 0; | |
1203 | int insn = 0; | |
1204 | Elf_Internal_Sym sym; | |
1205 | int off, adjust, oinsn; | |
1206 | bfd_signed_vma voff = 0; | |
1207 | boolean overflow; | |
1208 | ||
1209 | /* Get the new reloc address. */ | |
1210 | nraddr = irel->r_offset; | |
1211 | if ((irel->r_offset > addr | |
1212 | && irel->r_offset < toaddr) | |
1213 | || (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN | |
1214 | && irel->r_offset == toaddr)) | |
1215 | nraddr -= count; | |
1216 | ||
1217 | /* See if this reloc was for the bytes we have deleted, in which | |
1218 | case we no longer care about it. Don't delete relocs which | |
1219 | represent addresses, though. */ | |
1220 | if (irel->r_offset >= addr | |
1221 | && irel->r_offset < addr + count | |
1222 | && ELF32_R_TYPE (irel->r_info) != (int) R_SH_ALIGN | |
1223 | && ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE | |
1224 | && ELF32_R_TYPE (irel->r_info) != (int) R_SH_DATA | |
1225 | && ELF32_R_TYPE (irel->r_info) != (int) R_SH_LABEL) | |
1226 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1227 | (int) R_SH_NONE); | |
1228 | ||
1229 | /* If this is a PC relative reloc, see if the range it covers | |
1230 | includes the bytes we have deleted. */ | |
1231 | switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info)) | |
1232 | { | |
1233 | default: | |
1234 | break; | |
1235 | ||
1236 | case R_SH_DIR8WPN: | |
1237 | case R_SH_IND12W: | |
1238 | case R_SH_DIR8WPZ: | |
1239 | case R_SH_DIR8WPL: | |
1240 | start = irel->r_offset; | |
1241 | insn = bfd_get_16 (abfd, contents + nraddr); | |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info)) | |
1246 | { | |
1247 | default: | |
1248 | start = stop = addr; | |
1249 | break; | |
1250 | ||
1251 | case R_SH_DIR32: | |
1252 | /* If this reloc is against a symbol defined in this | |
1253 | section, and the symbol will not be adjusted below, we | |
1254 | must check the addend to see it will put the value in | |
1255 | range to be adjusted, and hence must be changed. */ | |
1256 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1257 | { | |
1258 | bfd_elf32_swap_symbol_in (abfd, | |
1259 | extsyms + ELF32_R_SYM (irel->r_info), | |
1260 | &sym); | |
1261 | if (sym.st_shndx == shndx | |
1262 | && (sym.st_value <= addr | |
1263 | || sym.st_value >= toaddr)) | |
1264 | { | |
1265 | bfd_vma val; | |
1266 | ||
1267 | val = bfd_get_32 (abfd, contents + nraddr); | |
1268 | val += sym.st_value; | |
1269 | if (val > addr && val < toaddr) | |
1270 | bfd_put_32 (abfd, val - count, contents + nraddr); | |
1271 | } | |
1272 | } | |
1273 | start = stop = addr; | |
1274 | break; | |
1275 | ||
1276 | case R_SH_DIR8WPN: | |
1277 | off = insn & 0xff; | |
1278 | if (off & 0x80) | |
1279 | off -= 0x100; | |
1280 | stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); | |
1281 | break; | |
1282 | ||
1283 | case R_SH_IND12W: | |
1284 | if (ELF32_R_SYM (irel->r_info) >= symtab_hdr->sh_info) | |
1285 | start = stop = addr; | |
1286 | else | |
1287 | { | |
1288 | off = insn & 0xfff; | |
1289 | if (off & 0x800) | |
1290 | off -= 0x1000; | |
1291 | stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); | |
1292 | } | |
1293 | break; | |
1294 | ||
1295 | case R_SH_DIR8WPZ: | |
1296 | off = insn & 0xff; | |
1297 | stop = start + 4 + off * 2; | |
1298 | break; | |
1299 | ||
1300 | case R_SH_DIR8WPL: | |
1301 | off = insn & 0xff; | |
1302 | stop = (start &~ (bfd_vma) 3) + 4 + off * 4; | |
1303 | break; | |
1304 | ||
1305 | case R_SH_SWITCH8: | |
1306 | case R_SH_SWITCH16: | |
1307 | case R_SH_SWITCH32: | |
1308 | /* These relocs types represent | |
1309 | .word L2-L1 | |
06e1ba78 | 1310 | The r_addend field holds the difference between the reloc |
252b5132 RH |
1311 | address and L1. That is the start of the reloc, and |
1312 | adding in the contents gives us the top. We must adjust | |
06e1ba78 JR |
1313 | both the r_offset field and the section contents. |
1314 | N.B. in gas / coff bfd, the elf bfd r_addend is called r_offset, | |
1315 | and the elf bfd r_offset is called r_vaddr. */ | |
252b5132 | 1316 | |
06e1ba78 JR |
1317 | stop = irel->r_offset; |
1318 | start = (bfd_vma) ((bfd_signed_vma) stop - (long) irel->r_addend); | |
252b5132 RH |
1319 | |
1320 | if (start > addr | |
1321 | && start < toaddr | |
1322 | && (stop <= addr || stop >= toaddr)) | |
1323 | irel->r_addend += count; | |
1324 | else if (stop > addr | |
1325 | && stop < toaddr | |
1326 | && (start <= addr || start >= toaddr)) | |
1327 | irel->r_addend -= count; | |
1328 | ||
252b5132 RH |
1329 | if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH16) |
1330 | voff = bfd_get_signed_16 (abfd, contents + nraddr); | |
1331 | else if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH8) | |
1332 | voff = bfd_get_8 (abfd, contents + nraddr); | |
1333 | else | |
1334 | voff = bfd_get_signed_32 (abfd, contents + nraddr); | |
1335 | stop = (bfd_vma) ((bfd_signed_vma) start + voff); | |
1336 | ||
1337 | break; | |
1338 | ||
1339 | case R_SH_USES: | |
1340 | start = irel->r_offset; | |
1341 | stop = (bfd_vma) ((bfd_signed_vma) start | |
1342 | + (long) irel->r_addend | |
1343 | + 4); | |
1344 | break; | |
1345 | } | |
1346 | ||
1347 | if (start > addr | |
1348 | && start < toaddr | |
1349 | && (stop <= addr || stop >= toaddr)) | |
1350 | adjust = count; | |
1351 | else if (stop > addr | |
1352 | && stop < toaddr | |
1353 | && (start <= addr || start >= toaddr)) | |
1354 | adjust = - count; | |
1355 | else | |
1356 | adjust = 0; | |
1357 | ||
1358 | if (adjust != 0) | |
1359 | { | |
1360 | oinsn = insn; | |
1361 | overflow = false; | |
1362 | switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info)) | |
1363 | { | |
1364 | default: | |
1365 | abort (); | |
1366 | break; | |
1367 | ||
1368 | case R_SH_DIR8WPN: | |
1369 | case R_SH_DIR8WPZ: | |
1370 | insn += adjust / 2; | |
1371 | if ((oinsn & 0xff00) != (insn & 0xff00)) | |
1372 | overflow = true; | |
1373 | bfd_put_16 (abfd, insn, contents + nraddr); | |
1374 | break; | |
1375 | ||
1376 | case R_SH_IND12W: | |
1377 | insn += adjust / 2; | |
1378 | if ((oinsn & 0xf000) != (insn & 0xf000)) | |
1379 | overflow = true; | |
1380 | bfd_put_16 (abfd, insn, contents + nraddr); | |
1381 | break; | |
1382 | ||
1383 | case R_SH_DIR8WPL: | |
1384 | BFD_ASSERT (adjust == count || count >= 4); | |
1385 | if (count >= 4) | |
1386 | insn += adjust / 4; | |
1387 | else | |
1388 | { | |
1389 | if ((irel->r_offset & 3) == 0) | |
1390 | ++insn; | |
1391 | } | |
1392 | if ((oinsn & 0xff00) != (insn & 0xff00)) | |
1393 | overflow = true; | |
1394 | bfd_put_16 (abfd, insn, contents + nraddr); | |
1395 | break; | |
1396 | ||
851cde10 JR |
1397 | case R_SH_SWITCH8: |
1398 | voff += adjust; | |
1399 | if (voff < 0 || voff >= 0xff) | |
1400 | overflow = true; | |
1401 | bfd_put_8 (abfd, voff, contents + nraddr); | |
1402 | break; | |
1403 | ||
252b5132 RH |
1404 | case R_SH_SWITCH16: |
1405 | voff += adjust; | |
1406 | if (voff < - 0x8000 || voff >= 0x8000) | |
1407 | overflow = true; | |
1408 | bfd_put_signed_16 (abfd, voff, contents + nraddr); | |
1409 | break; | |
1410 | ||
1411 | case R_SH_SWITCH32: | |
1412 | voff += adjust; | |
1413 | bfd_put_signed_32 (abfd, voff, contents + nraddr); | |
1414 | break; | |
1415 | ||
1416 | case R_SH_USES: | |
1417 | irel->r_addend += adjust; | |
1418 | break; | |
1419 | } | |
1420 | ||
1421 | if (overflow) | |
1422 | { | |
1423 | ((*_bfd_error_handler) | |
1424 | (_("%s: 0x%lx: fatal: reloc overflow while relaxing"), | |
1425 | bfd_get_filename (abfd), (unsigned long) irel->r_offset)); | |
1426 | bfd_set_error (bfd_error_bad_value); | |
1427 | return false; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | irel->r_offset = nraddr; | |
1432 | } | |
1433 | ||
1434 | /* Look through all the other sections. If there contain any IMM32 | |
1435 | relocs against internal symbols which we are not going to adjust | |
1436 | below, we may need to adjust the addends. */ | |
1437 | for (o = abfd->sections; o != NULL; o = o->next) | |
1438 | { | |
1439 | Elf_Internal_Rela *internal_relocs; | |
1440 | Elf_Internal_Rela *irelscan, *irelscanend; | |
1441 | bfd_byte *ocontents; | |
1442 | ||
1443 | if (o == sec | |
1444 | || (o->flags & SEC_RELOC) == 0 | |
1445 | || o->reloc_count == 0) | |
1446 | continue; | |
1447 | ||
1448 | /* We always cache the relocs. Perhaps, if info->keep_memory is | |
1449 | false, we should free them, if we are permitted to, when we | |
1450 | leave sh_coff_relax_section. */ | |
1451 | internal_relocs = (_bfd_elf32_link_read_relocs | |
1452 | (abfd, o, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
1453 | true)); | |
1454 | if (internal_relocs == NULL) | |
1455 | return false; | |
1456 | ||
1457 | ocontents = NULL; | |
1458 | irelscanend = internal_relocs + o->reloc_count; | |
1459 | for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++) | |
1460 | { | |
1461 | Elf_Internal_Sym sym; | |
1462 | ||
084aa3aa JR |
1463 | /* Dwarf line numbers use R_SH_SWITCH32 relocs. */ |
1464 | if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_SWITCH32) | |
1465 | { | |
1466 | bfd_vma start, stop; | |
1467 | bfd_signed_vma voff; | |
1468 | ||
1469 | if (ocontents == NULL) | |
1470 | { | |
1471 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
1472 | ocontents = elf_section_data (o)->this_hdr.contents; | |
1473 | else | |
1474 | { | |
1475 | /* We always cache the section contents. | |
1476 | Perhaps, if info->keep_memory is false, we | |
1477 | should free them, if we are permitted to, | |
1478 | when we leave sh_coff_relax_section. */ | |
1479 | ocontents = (bfd_byte *) bfd_malloc (o->_raw_size); | |
1480 | if (ocontents == NULL) | |
1481 | return false; | |
1482 | if (! bfd_get_section_contents (abfd, o, ocontents, | |
1483 | (file_ptr) 0, | |
1484 | o->_raw_size)) | |
1485 | return false; | |
1486 | elf_section_data (o)->this_hdr.contents = ocontents; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | stop = irelscan->r_offset; | |
1491 | start | |
1492 | = (bfd_vma) ((bfd_signed_vma) stop - (long) irelscan->r_addend); | |
1493 | ||
1494 | /* STOP is in a different section, so it won't change. */ | |
1495 | if (start > addr && start < toaddr) | |
1496 | irelscan->r_addend += count; | |
1497 | ||
1498 | voff = bfd_get_signed_32 (abfd, ocontents + irelscan->r_offset); | |
1499 | stop = (bfd_vma) ((bfd_signed_vma) start + voff); | |
1500 | ||
1501 | if (start > addr | |
1502 | && start < toaddr | |
1503 | && (stop <= addr || stop >= toaddr)) | |
1504 | bfd_put_signed_32 (abfd, voff + count, | |
1505 | ocontents + irelscan->r_offset); | |
1506 | else if (stop > addr | |
1507 | && stop < toaddr | |
1508 | && (start <= addr || start >= toaddr)) | |
1509 | bfd_put_signed_32 (abfd, voff - count, | |
1510 | ocontents + irelscan->r_offset); | |
1511 | } | |
1512 | ||
252b5132 RH |
1513 | if (ELF32_R_TYPE (irelscan->r_info) != (int) R_SH_DIR32) |
1514 | continue; | |
1515 | ||
1516 | if (ELF32_R_SYM (irelscan->r_info) >= symtab_hdr->sh_info) | |
1517 | continue; | |
1518 | ||
1519 | bfd_elf32_swap_symbol_in (abfd, | |
1520 | extsyms + ELF32_R_SYM (irelscan->r_info), | |
1521 | &sym); | |
1522 | ||
1523 | if (sym.st_shndx == shndx | |
1524 | && (sym.st_value <= addr | |
1525 | || sym.st_value >= toaddr)) | |
1526 | { | |
1527 | bfd_vma val; | |
1528 | ||
1529 | if (ocontents == NULL) | |
1530 | { | |
1531 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
1532 | ocontents = elf_section_data (o)->this_hdr.contents; | |
1533 | else | |
1534 | { | |
1535 | /* We always cache the section contents. | |
1536 | Perhaps, if info->keep_memory is false, we | |
1537 | should free them, if we are permitted to, | |
1538 | when we leave sh_coff_relax_section. */ | |
1539 | ocontents = (bfd_byte *) bfd_malloc (o->_raw_size); | |
1540 | if (ocontents == NULL) | |
1541 | return false; | |
1542 | if (! bfd_get_section_contents (abfd, o, ocontents, | |
1543 | (file_ptr) 0, | |
1544 | o->_raw_size)) | |
1545 | return false; | |
1546 | elf_section_data (o)->this_hdr.contents = ocontents; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | val = bfd_get_32 (abfd, ocontents + irelscan->r_offset); | |
1551 | val += sym.st_value; | |
1552 | if (val > addr && val < toaddr) | |
1553 | bfd_put_32 (abfd, val - count, | |
1554 | ocontents + irelscan->r_offset); | |
1555 | } | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | /* Adjust the local symbols defined in this section. */ | |
1560 | esym = extsyms; | |
1561 | esymend = esym + symtab_hdr->sh_info; | |
1562 | for (; esym < esymend; esym++) | |
1563 | { | |
1564 | Elf_Internal_Sym isym; | |
1565 | ||
1566 | bfd_elf32_swap_symbol_in (abfd, esym, &isym); | |
1567 | ||
1568 | if (isym.st_shndx == shndx | |
1569 | && isym.st_value > addr | |
1570 | && isym.st_value < toaddr) | |
1571 | { | |
1572 | isym.st_value -= count; | |
1573 | bfd_elf32_swap_symbol_out (abfd, &isym, esym); | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | /* Now adjust the global symbols defined in this section. */ | |
1578 | esym = extsyms + symtab_hdr->sh_info; | |
1579 | esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); | |
1580 | for (index = 0; esym < esymend; esym++, index++) | |
1581 | { | |
1582 | Elf_Internal_Sym isym; | |
1583 | ||
1584 | bfd_elf32_swap_symbol_in (abfd, esym, &isym); | |
1585 | sym_hash = elf_sym_hashes (abfd)[index]; | |
1586 | if (isym.st_shndx == shndx | |
1587 | && ((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 | && (sym_hash)->root.u.def.value < toaddr) | |
1592 | { | |
1593 | (sym_hash)->root.u.def.value -= count; | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | /* See if we can move the ALIGN reloc forward. We have adjusted | |
1598 | r_offset for it already. */ | |
1599 | if (irelalign != NULL) | |
1600 | { | |
1601 | bfd_vma alignto, alignaddr; | |
1602 | ||
1603 | alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend); | |
1604 | alignaddr = BFD_ALIGN (irelalign->r_offset, | |
1605 | 1 << irelalign->r_addend); | |
1606 | if (alignto != alignaddr) | |
1607 | { | |
1608 | /* Tail recursion. */ | |
1609 | return sh_elf_relax_delete_bytes (abfd, sec, alignaddr, | |
1610 | alignto - alignaddr); | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | return true; | |
1615 | } | |
1616 | ||
1617 | /* Look for loads and stores which we can align to four byte | |
1618 | boundaries. This is like sh_align_loads in coff-sh.c. */ | |
1619 | ||
1620 | static boolean | |
1621 | sh_elf_align_loads (abfd, sec, internal_relocs, contents, pswapped) | |
1622 | bfd *abfd; | |
1623 | asection *sec; | |
1624 | Elf_Internal_Rela *internal_relocs; | |
1625 | bfd_byte *contents; | |
1626 | boolean *pswapped; | |
1627 | { | |
1628 | Elf_Internal_Rela *irel, *irelend; | |
1629 | bfd_vma *labels = NULL; | |
1630 | bfd_vma *label, *label_end; | |
1631 | ||
1632 | *pswapped = false; | |
1633 | ||
1634 | irelend = internal_relocs + sec->reloc_count; | |
1635 | ||
1636 | /* Get all the addresses with labels on them. */ | |
1637 | labels = (bfd_vma *) bfd_malloc (sec->reloc_count * sizeof (bfd_vma)); | |
1638 | if (labels == NULL) | |
1639 | goto error_return; | |
1640 | label_end = labels; | |
1641 | for (irel = internal_relocs; irel < irelend; irel++) | |
1642 | { | |
1643 | if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_LABEL) | |
1644 | { | |
1645 | *label_end = irel->r_offset; | |
1646 | ++label_end; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | /* Note that the assembler currently always outputs relocs in | |
1651 | address order. If that ever changes, this code will need to sort | |
1652 | the label values and the relocs. */ | |
1653 | ||
1654 | label = labels; | |
1655 | ||
1656 | for (irel = internal_relocs; irel < irelend; irel++) | |
1657 | { | |
1658 | bfd_vma start, stop; | |
1659 | ||
1660 | if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE) | |
1661 | continue; | |
1662 | ||
1663 | start = irel->r_offset; | |
1664 | ||
1665 | for (irel++; irel < irelend; irel++) | |
1666 | if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_DATA) | |
1667 | break; | |
1668 | if (irel < irelend) | |
1669 | stop = irel->r_offset; | |
1670 | else | |
1671 | stop = sec->_cooked_size; | |
1672 | ||
1673 | if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_elf_swap_insns, | |
1674 | (PTR) internal_relocs, &label, | |
1675 | label_end, start, stop, pswapped)) | |
1676 | goto error_return; | |
1677 | } | |
1678 | ||
1679 | free (labels); | |
1680 | ||
1681 | return true; | |
1682 | ||
1683 | error_return: | |
1684 | if (labels != NULL) | |
1685 | free (labels); | |
1686 | return false; | |
1687 | } | |
1688 | ||
1689 | /* Swap two SH instructions. This is like sh_swap_insns in coff-sh.c. */ | |
1690 | ||
1691 | static boolean | |
1692 | sh_elf_swap_insns (abfd, sec, relocs, contents, addr) | |
1693 | bfd *abfd; | |
1694 | asection *sec; | |
1695 | PTR relocs; | |
1696 | bfd_byte *contents; | |
1697 | bfd_vma addr; | |
1698 | { | |
1699 | Elf_Internal_Rela *internal_relocs = (Elf_Internal_Rela *) relocs; | |
1700 | unsigned short i1, i2; | |
1701 | Elf_Internal_Rela *irel, *irelend; | |
1702 | ||
1703 | /* Swap the instructions themselves. */ | |
1704 | i1 = bfd_get_16 (abfd, contents + addr); | |
1705 | i2 = bfd_get_16 (abfd, contents + addr + 2); | |
1706 | bfd_put_16 (abfd, i2, contents + addr); | |
1707 | bfd_put_16 (abfd, i1, contents + addr + 2); | |
1708 | ||
1709 | /* Adjust all reloc addresses. */ | |
1710 | irelend = internal_relocs + sec->reloc_count; | |
1711 | for (irel = internal_relocs; irel < irelend; irel++) | |
1712 | { | |
1713 | enum elf_sh_reloc_type type; | |
1714 | int add; | |
1715 | ||
1716 | /* There are a few special types of relocs that we don't want to | |
1717 | adjust. These relocs do not apply to the instruction itself, | |
1718 | but are only associated with the address. */ | |
1719 | type = (enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info); | |
1720 | if (type == R_SH_ALIGN | |
1721 | || type == R_SH_CODE | |
1722 | || type == R_SH_DATA | |
1723 | || type == R_SH_LABEL) | |
1724 | continue; | |
1725 | ||
1726 | /* If an R_SH_USES reloc points to one of the addresses being | |
1727 | swapped, we must adjust it. It would be incorrect to do this | |
1728 | for a jump, though, since we want to execute both | |
1729 | instructions after the jump. (We have avoided swapping | |
1730 | around a label, so the jump will not wind up executing an | |
1731 | instruction it shouldn't). */ | |
1732 | if (type == R_SH_USES) | |
1733 | { | |
1734 | bfd_vma off; | |
1735 | ||
1736 | off = irel->r_offset + 4 + irel->r_addend; | |
1737 | if (off == addr) | |
1738 | irel->r_offset += 2; | |
1739 | else if (off == addr + 2) | |
1740 | irel->r_offset -= 2; | |
1741 | } | |
1742 | ||
1743 | if (irel->r_offset == addr) | |
1744 | { | |
1745 | irel->r_offset += 2; | |
1746 | add = -2; | |
1747 | } | |
1748 | else if (irel->r_offset == addr + 2) | |
1749 | { | |
1750 | irel->r_offset -= 2; | |
1751 | add = 2; | |
1752 | } | |
1753 | else | |
1754 | add = 0; | |
1755 | ||
1756 | if (add != 0) | |
1757 | { | |
1758 | bfd_byte *loc; | |
1759 | unsigned short insn, oinsn; | |
1760 | boolean overflow; | |
1761 | ||
1762 | loc = contents + irel->r_offset; | |
1763 | overflow = false; | |
1764 | switch (type) | |
1765 | { | |
1766 | default: | |
1767 | break; | |
1768 | ||
1769 | case R_SH_DIR8WPN: | |
1770 | case R_SH_DIR8WPZ: | |
1771 | insn = bfd_get_16 (abfd, loc); | |
1772 | oinsn = insn; | |
1773 | insn += add / 2; | |
1774 | if ((oinsn & 0xff00) != (insn & 0xff00)) | |
1775 | overflow = true; | |
1776 | bfd_put_16 (abfd, insn, loc); | |
1777 | break; | |
1778 | ||
1779 | case R_SH_IND12W: | |
1780 | insn = bfd_get_16 (abfd, loc); | |
1781 | oinsn = insn; | |
1782 | insn += add / 2; | |
1783 | if ((oinsn & 0xf000) != (insn & 0xf000)) | |
1784 | overflow = true; | |
1785 | bfd_put_16 (abfd, insn, loc); | |
1786 | break; | |
1787 | ||
1788 | case R_SH_DIR8WPL: | |
1789 | /* This reloc ignores the least significant 3 bits of | |
1790 | the program counter before adding in the offset. | |
1791 | This means that if ADDR is at an even address, the | |
1792 | swap will not affect the offset. If ADDR is an at an | |
1793 | odd address, then the instruction will be crossing a | |
1794 | four byte boundary, and must be adjusted. */ | |
1795 | if ((addr & 3) != 0) | |
1796 | { | |
1797 | insn = bfd_get_16 (abfd, loc); | |
1798 | oinsn = insn; | |
1799 | insn += add / 2; | |
1800 | if ((oinsn & 0xff00) != (insn & 0xff00)) | |
1801 | overflow = true; | |
1802 | bfd_put_16 (abfd, insn, loc); | |
1803 | } | |
1804 | ||
1805 | break; | |
1806 | } | |
1807 | ||
1808 | if (overflow) | |
1809 | { | |
1810 | ((*_bfd_error_handler) | |
1811 | (_("%s: 0x%lx: fatal: reloc overflow while relaxing"), | |
1812 | bfd_get_filename (abfd), (unsigned long) irel->r_offset)); | |
1813 | bfd_set_error (bfd_error_bad_value); | |
1814 | return false; | |
1815 | } | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | return true; | |
1820 | } | |
1821 | \f | |
1822 | /* Relocate an SH ELF section. */ | |
1823 | ||
1824 | static boolean | |
1825 | sh_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
1826 | contents, relocs, local_syms, local_sections) | |
5f771d47 | 1827 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1828 | struct bfd_link_info *info; |
1829 | bfd *input_bfd; | |
1830 | asection *input_section; | |
1831 | bfd_byte *contents; | |
1832 | Elf_Internal_Rela *relocs; | |
1833 | Elf_Internal_Sym *local_syms; | |
1834 | asection **local_sections; | |
1835 | { | |
1836 | Elf_Internal_Shdr *symtab_hdr; | |
1837 | struct elf_link_hash_entry **sym_hashes; | |
1838 | Elf_Internal_Rela *rel, *relend; | |
1839 | ||
1840 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1841 | sym_hashes = elf_sym_hashes (input_bfd); | |
1842 | ||
1843 | rel = relocs; | |
1844 | relend = relocs + input_section->reloc_count; | |
1845 | for (; rel < relend; rel++) | |
1846 | { | |
1847 | int r_type; | |
1848 | reloc_howto_type *howto; | |
1849 | unsigned long r_symndx; | |
1850 | Elf_Internal_Sym *sym; | |
1851 | asection *sec; | |
1852 | struct elf_link_hash_entry *h; | |
1853 | bfd_vma relocation; | |
1854 | bfd_vma addend = (bfd_vma)0; | |
1855 | bfd_reloc_status_type r; | |
1856 | ||
1857 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1858 | ||
1859 | if (info->relocateable) | |
1860 | { | |
1861 | /* This is a relocateable link. We don't have to change | |
1862 | anything, unless the reloc is against a section symbol, | |
1863 | in which case we have to adjust according to where the | |
1864 | section symbol winds up in the output section. */ | |
1865 | if (r_symndx < symtab_hdr->sh_info) | |
1866 | { | |
1867 | sym = local_syms + r_symndx; | |
1868 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1869 | { | |
1870 | sec = local_sections[r_symndx]; | |
1871 | rel->r_addend += sec->output_offset + sym->st_value; | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | continue; | |
1876 | } | |
1877 | ||
1878 | r_type = ELF32_R_TYPE (rel->r_info); | |
1879 | ||
1880 | /* Many of the relocs are only used for relaxing, and are | |
1881 | handled entirely by the relaxation code. */ | |
015551fc JR |
1882 | if (r_type > (int) R_SH_LAST_INVALID_RELOC |
1883 | && r_type < (int) R_SH_LOOP_START) | |
252b5132 RH |
1884 | continue; |
1885 | ||
1886 | if (r_type < 0 | |
9bdafcce | 1887 | || r_type >= R_SH_max |
015551fc JR |
1888 | || (r_type >= (int) R_SH_FIRST_INVALID_RELOC |
1889 | && r_type <= (int) R_SH_LAST_INVALID_RELOC)) | |
252b5132 RH |
1890 | { |
1891 | bfd_set_error (bfd_error_bad_value); | |
1892 | return false; | |
1893 | } | |
1894 | ||
252b5132 RH |
1895 | howto = sh_elf_howto_table + r_type; |
1896 | ||
1897 | /* This is a final link. */ | |
1898 | h = NULL; | |
1899 | sym = NULL; | |
1900 | sec = NULL; | |
1901 | if (r_symndx < symtab_hdr->sh_info) | |
1902 | { | |
252b5132 RH |
1903 | sym = local_syms + r_symndx; |
1904 | sec = local_sections[r_symndx]; | |
1905 | relocation = (sec->output_section->vma | |
1906 | + sec->output_offset | |
1907 | + sym->st_value); | |
1908 | } | |
1909 | else | |
1910 | { | |
1911 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1912 | while (h->root.type == bfd_link_hash_indirect | |
1913 | || h->root.type == bfd_link_hash_warning) | |
1914 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1915 | if (h->root.type == bfd_link_hash_defined | |
1916 | || h->root.type == bfd_link_hash_defweak) | |
1917 | { | |
1918 | sec = h->root.u.def.section; | |
1919 | relocation = (h->root.u.def.value | |
1920 | + sec->output_section->vma | |
1921 | + sec->output_offset); | |
1922 | } | |
1923 | else if (h->root.type == bfd_link_hash_undefweak) | |
1924 | relocation = 0; | |
1925 | else | |
1926 | { | |
1927 | if (! ((*info->callbacks->undefined_symbol) | |
1928 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1929 | input_section, rel->r_offset, true))) |
252b5132 RH |
1930 | return false; |
1931 | relocation = 0; | |
1932 | } | |
1933 | } | |
1934 | ||
252b5132 RH |
1935 | switch ((int)r_type) |
1936 | { | |
9bdafcce | 1937 | final_link_relocate: |
015551fc JR |
1938 | /* COFF relocs don't use the addend. The addend is used for |
1939 | R_SH_DIR32 to be compatible with other compilers. */ | |
1940 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1941 | contents, rel->r_offset, | |
1942 | relocation, addend); | |
252b5132 | 1943 | break; |
9bdafcce AO |
1944 | |
1945 | case R_SH_IND12W: | |
1946 | case R_SH_DIR8WPN: | |
1947 | case R_SH_DIR8WPZ: | |
1948 | case R_SH_DIR8WPL: | |
1949 | /* These should normally be handled by the assembler, but at | |
1950 | least IND12W is generated by ourselves, so we must deal | |
1951 | with it. */ | |
1952 | relocation -= 4; | |
1953 | goto final_link_relocate; | |
1954 | ||
1955 | default: | |
1956 | bfd_set_error (bfd_error_bad_value); | |
1957 | return false; | |
1958 | ||
1959 | case R_SH_DIR32: | |
1960 | addend = rel->r_addend; | |
1961 | goto final_link_relocate; | |
1962 | ||
015551fc JR |
1963 | case R_SH_LOOP_START: |
1964 | { | |
1965 | static bfd_vma start, end; | |
1966 | ||
1967 | start = (relocation + rel->r_addend | |
1968 | - (sec->output_section->vma + sec->output_offset)); | |
1969 | r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents, | |
1970 | rel->r_offset, sec, start, end); | |
1971 | break; | |
9bdafcce | 1972 | |
015551fc JR |
1973 | case R_SH_LOOP_END: |
1974 | end = (relocation + rel->r_addend | |
1975 | - (sec->output_section->vma + sec->output_offset)); | |
1976 | r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents, | |
1977 | rel->r_offset, sec, start, end); | |
1978 | break; | |
1979 | } | |
252b5132 RH |
1980 | } |
1981 | ||
252b5132 RH |
1982 | if (r != bfd_reloc_ok) |
1983 | { | |
1984 | switch (r) | |
1985 | { | |
1986 | default: | |
1987 | case bfd_reloc_outofrange: | |
1988 | abort (); | |
1989 | case bfd_reloc_overflow: | |
1990 | { | |
1991 | const char *name; | |
1992 | ||
1993 | if (h != NULL) | |
1994 | name = h->root.root.string; | |
1995 | else | |
1996 | { | |
1997 | name = (bfd_elf_string_from_elf_section | |
1998 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1999 | if (name == NULL) | |
2000 | return false; | |
2001 | if (*name == '\0') | |
2002 | name = bfd_section_name (input_bfd, sec); | |
2003 | } | |
2004 | if (! ((*info->callbacks->reloc_overflow) | |
2005 | (info, name, howto->name, (bfd_vma) 0, | |
2006 | input_bfd, input_section, rel->r_offset))) | |
2007 | return false; | |
2008 | } | |
2009 | break; | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | return true; | |
2015 | } | |
2016 | ||
2017 | /* This is a version of bfd_generic_get_relocated_section_contents | |
2018 | which uses sh_elf_relocate_section. */ | |
2019 | ||
2020 | static bfd_byte * | |
2021 | sh_elf_get_relocated_section_contents (output_bfd, link_info, link_order, | |
2022 | data, relocateable, symbols) | |
2023 | bfd *output_bfd; | |
2024 | struct bfd_link_info *link_info; | |
2025 | struct bfd_link_order *link_order; | |
2026 | bfd_byte *data; | |
2027 | boolean relocateable; | |
2028 | asymbol **symbols; | |
2029 | { | |
2030 | Elf_Internal_Shdr *symtab_hdr; | |
2031 | asection *input_section = link_order->u.indirect.section; | |
2032 | bfd *input_bfd = input_section->owner; | |
2033 | asection **sections = NULL; | |
2034 | Elf_Internal_Rela *internal_relocs = NULL; | |
2035 | Elf32_External_Sym *external_syms = NULL; | |
2036 | Elf_Internal_Sym *internal_syms = NULL; | |
2037 | ||
2038 | /* We only need to handle the case of relaxing, or of having a | |
2039 | particular set of section contents, specially. */ | |
2040 | if (relocateable | |
2041 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2042 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2043 | link_order, data, | |
2044 | relocateable, | |
2045 | symbols); | |
2046 | ||
2047 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2048 | ||
2049 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
2050 | input_section->_raw_size); | |
2051 | ||
2052 | if ((input_section->flags & SEC_RELOC) != 0 | |
2053 | && input_section->reloc_count > 0) | |
2054 | { | |
2055 | Elf_Internal_Sym *isymp; | |
2056 | asection **secpp; | |
2057 | Elf32_External_Sym *esym, *esymend; | |
2058 | ||
2059 | if (symtab_hdr->contents != NULL) | |
2060 | external_syms = (Elf32_External_Sym *) symtab_hdr->contents; | |
2061 | else | |
2062 | { | |
2063 | external_syms = ((Elf32_External_Sym *) | |
2064 | bfd_malloc (symtab_hdr->sh_info | |
2065 | * sizeof (Elf32_External_Sym))); | |
2066 | if (external_syms == NULL && symtab_hdr->sh_info > 0) | |
2067 | goto error_return; | |
2068 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
2069 | || (bfd_read (external_syms, sizeof (Elf32_External_Sym), | |
2070 | symtab_hdr->sh_info, input_bfd) | |
2071 | != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))) | |
2072 | goto error_return; | |
2073 | } | |
2074 | ||
2075 | internal_relocs = (_bfd_elf32_link_read_relocs | |
2076 | (input_bfd, input_section, (PTR) NULL, | |
2077 | (Elf_Internal_Rela *) NULL, false)); | |
2078 | if (internal_relocs == NULL) | |
2079 | goto error_return; | |
2080 | ||
2081 | internal_syms = ((Elf_Internal_Sym *) | |
2082 | bfd_malloc (symtab_hdr->sh_info | |
2083 | * sizeof (Elf_Internal_Sym))); | |
2084 | if (internal_syms == NULL && symtab_hdr->sh_info > 0) | |
2085 | goto error_return; | |
2086 | ||
2087 | sections = (asection **) bfd_malloc (symtab_hdr->sh_info | |
2088 | * sizeof (asection *)); | |
2089 | if (sections == NULL && symtab_hdr->sh_info > 0) | |
2090 | goto error_return; | |
2091 | ||
2092 | isymp = internal_syms; | |
2093 | secpp = sections; | |
2094 | esym = external_syms; | |
2095 | esymend = esym + symtab_hdr->sh_info; | |
2096 | for (; esym < esymend; ++esym, ++isymp, ++secpp) | |
2097 | { | |
2098 | asection *isec; | |
2099 | ||
2100 | bfd_elf32_swap_symbol_in (input_bfd, esym, isymp); | |
2101 | ||
2102 | if (isymp->st_shndx == SHN_UNDEF) | |
2103 | isec = bfd_und_section_ptr; | |
2104 | else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE) | |
2105 | isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx); | |
2106 | else if (isymp->st_shndx == SHN_ABS) | |
2107 | isec = bfd_abs_section_ptr; | |
2108 | else if (isymp->st_shndx == SHN_COMMON) | |
2109 | isec = bfd_com_section_ptr; | |
2110 | else | |
2111 | { | |
2112 | /* Who knows? */ | |
2113 | isec = NULL; | |
2114 | } | |
2115 | ||
2116 | *secpp = isec; | |
2117 | } | |
2118 | ||
2119 | if (! sh_elf_relocate_section (output_bfd, link_info, input_bfd, | |
2120 | input_section, data, internal_relocs, | |
2121 | internal_syms, sections)) | |
2122 | goto error_return; | |
2123 | ||
2124 | if (sections != NULL) | |
2125 | free (sections); | |
2126 | sections = NULL; | |
2127 | if (internal_syms != NULL) | |
2128 | free (internal_syms); | |
2129 | internal_syms = NULL; | |
2130 | if (external_syms != NULL && symtab_hdr->contents == NULL) | |
2131 | free (external_syms); | |
2132 | external_syms = NULL; | |
2133 | if (internal_relocs != elf_section_data (input_section)->relocs) | |
2134 | free (internal_relocs); | |
2135 | internal_relocs = NULL; | |
2136 | } | |
2137 | ||
2138 | return data; | |
2139 | ||
2140 | error_return: | |
2141 | if (internal_relocs != NULL | |
2142 | && internal_relocs != elf_section_data (input_section)->relocs) | |
2143 | free (internal_relocs); | |
2144 | if (external_syms != NULL && symtab_hdr->contents == NULL) | |
2145 | free (external_syms); | |
2146 | if (internal_syms != NULL) | |
2147 | free (internal_syms); | |
2148 | if (sections != NULL) | |
2149 | free (sections); | |
2150 | return NULL; | |
2151 | } | |
2152 | static asection * | |
2153 | sh_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
2154 | bfd *abfd; | |
5f771d47 | 2155 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
2156 | Elf_Internal_Rela *rel; |
2157 | struct elf_link_hash_entry *h; | |
2158 | Elf_Internal_Sym *sym; | |
2159 | { | |
2160 | if (h != NULL) | |
2161 | { | |
2162 | switch (ELF32_R_TYPE (rel->r_info)) | |
2163 | { | |
2164 | case R_SH_GNU_VTINHERIT: | |
2165 | case R_SH_GNU_VTENTRY: | |
2166 | break; | |
2167 | ||
2168 | default: | |
2169 | switch (h->root.type) | |
2170 | { | |
2171 | case bfd_link_hash_defined: | |
2172 | case bfd_link_hash_defweak: | |
2173 | return h->root.u.def.section; | |
2174 | ||
2175 | case bfd_link_hash_common: | |
2176 | return h->root.u.c.p->section; | |
e049a0de ILT |
2177 | |
2178 | default: | |
2179 | break; | |
252b5132 RH |
2180 | } |
2181 | } | |
2182 | } | |
2183 | else | |
2184 | { | |
2185 | if (!(elf_bad_symtab (abfd) | |
2186 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
2187 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
2188 | && sym->st_shndx != SHN_COMMON)) | |
2189 | { | |
2190 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
2191 | } | |
2192 | } | |
2193 | return NULL; | |
2194 | } | |
2195 | ||
2196 | static boolean | |
2197 | sh_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
2198 | bfd *abfd ATTRIBUTE_UNUSED; |
2199 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2200 | asection *sec ATTRIBUTE_UNUSED; | |
2201 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 RH |
2202 | { |
2203 | /* we don't use got and plt entries for sh. */ | |
2204 | return true; | |
2205 | } | |
2206 | ||
2207 | /* Look through the relocs for a section during the first phase. | |
2208 | Since we don't do .gots or .plts, we just need to consider the | |
2209 | virtual table relocs for gc. */ | |
2210 | ||
2211 | static boolean | |
2212 | sh_elf_check_relocs (abfd, info, sec, relocs) | |
2213 | bfd *abfd; | |
2214 | struct bfd_link_info *info; | |
2215 | asection *sec; | |
2216 | const Elf_Internal_Rela *relocs; | |
2217 | { | |
2218 | Elf_Internal_Shdr *symtab_hdr; | |
2219 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
2220 | const Elf_Internal_Rela *rel; | |
2221 | const Elf_Internal_Rela *rel_end; | |
2222 | ||
2223 | if (info->relocateable) | |
2224 | return true; | |
2225 | ||
2226 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2227 | sym_hashes = elf_sym_hashes (abfd); | |
2228 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); | |
2229 | if (!elf_bad_symtab (abfd)) | |
2230 | sym_hashes_end -= symtab_hdr->sh_info; | |
2231 | ||
2232 | rel_end = relocs + sec->reloc_count; | |
2233 | for (rel = relocs; rel < rel_end; rel++) | |
2234 | { | |
2235 | struct elf_link_hash_entry *h; | |
2236 | unsigned long r_symndx; | |
2237 | ||
2238 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2239 | if (r_symndx < symtab_hdr->sh_info) | |
2240 | h = NULL; | |
2241 | else | |
2242 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2243 | ||
2244 | switch (ELF32_R_TYPE (rel->r_info)) | |
2245 | { | |
2246 | /* This relocation describes the C++ object vtable hierarchy. | |
2247 | Reconstruct it for later use during GC. */ | |
2248 | case R_SH_GNU_VTINHERIT: | |
2249 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2250 | return false; | |
2251 | break; | |
2252 | ||
2253 | /* This relocation describes which C++ vtable entries are actually | |
2254 | used. Record for later use during GC. */ | |
2255 | case R_SH_GNU_VTENTRY: | |
2256 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
2257 | return false; | |
2258 | break; | |
2259 | } | |
2260 | } | |
2261 | ||
2262 | return true; | |
2263 | } | |
2264 | ||
1630fd2b | 2265 | static boolean |
d4845d57 JR |
2266 | sh_elf_set_mach_from_flags (abfd) |
2267 | bfd * abfd; | |
2268 | { | |
2269 | flagword flags = elf_elfheader (abfd)->e_flags; | |
2270 | ||
86033394 | 2271 | switch (flags & EF_SH_MACH_MASK) |
d4845d57 JR |
2272 | { |
2273 | case EF_SH1: | |
2274 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh); | |
2275 | break; | |
2276 | case EF_SH2: | |
2277 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh2); | |
2278 | break; | |
2279 | case EF_SH_DSP: | |
2280 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh_dsp); | |
2281 | break; | |
2282 | case EF_SH3: | |
2283 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh3); | |
2284 | break; | |
2285 | case EF_SH3_DSP: | |
2286 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh3_dsp); | |
2287 | break; | |
2288 | case EF_SH3E: | |
2289 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh3e); | |
2290 | break; | |
2291 | case EF_SH_UNKNOWN: | |
2292 | case EF_SH4: | |
2293 | bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh4); | |
2294 | break; | |
2295 | default: | |
2296 | return false; | |
2297 | } | |
2298 | return true; | |
2299 | } | |
2300 | ||
2301 | /* Function to keep SH specific file flags. */ | |
2302 | static boolean | |
2303 | sh_elf_set_private_flags (abfd, flags) | |
2304 | bfd * abfd; | |
2305 | flagword flags; | |
2306 | { | |
2307 | BFD_ASSERT (! elf_flags_init (abfd) | |
2308 | || elf_elfheader (abfd)->e_flags == flags); | |
2309 | ||
2310 | elf_elfheader (abfd)->e_flags = flags; | |
2311 | elf_flags_init (abfd) = true; | |
2312 | return sh_elf_set_mach_from_flags (abfd); | |
2313 | } | |
2314 | ||
2315 | /* Copy backend specific data from one object module to another */ | |
2316 | static boolean | |
2317 | sh_elf_copy_private_data (ibfd, obfd) | |
2318 | bfd * ibfd; | |
2319 | bfd * obfd; | |
2320 | { | |
2321 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2322 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2323 | return true; | |
2324 | ||
2325 | return sh_elf_set_private_flags (obfd, elf_elfheader (ibfd)->e_flags); | |
2326 | } | |
2327 | ||
2328 | /* This routine checks for linking big and little endian objects | |
2329 | together, and for linking sh-dsp with sh3e / sh4 objects. */ | |
2330 | ||
2331 | static boolean | |
2332 | sh_elf_merge_private_data (ibfd, obfd) | |
2333 | bfd *ibfd; | |
2334 | bfd *obfd; | |
2335 | { | |
2336 | flagword old_flags, new_flags; | |
2337 | ||
2338 | if (_bfd_generic_verify_endian_match (ibfd, obfd) == false) | |
2339 | return false; | |
2340 | ||
2341 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2342 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2343 | return true; | |
2344 | ||
2345 | if (! elf_flags_init (obfd)) | |
2346 | { | |
2347 | elf_flags_init (obfd) = true; | |
2348 | elf_elfheader (obfd)->e_flags = 0; | |
2349 | } | |
2350 | old_flags = elf_elfheader (obfd)->e_flags; | |
2351 | new_flags = elf_elfheader (ibfd)->e_flags; | |
2352 | if ((EF_SH_HAS_DSP (old_flags) && EF_SH_HAS_FP (new_flags)) | |
2353 | || (EF_SH_HAS_DSP (new_flags) && EF_SH_HAS_FP (old_flags))) | |
2354 | { | |
2355 | (*_bfd_error_handler) | |
2356 | ("%s: uses %s instructions while previous modules use %s instructions", | |
2357 | bfd_get_filename (ibfd), | |
2358 | EF_SH_HAS_DSP (new_flags) ? "dsp" : "floating point", | |
2359 | EF_SH_HAS_DSP (new_flags) ? "floating point" : "dsp"); | |
2360 | bfd_set_error (bfd_error_bad_value); | |
2361 | return false; | |
2362 | } | |
2363 | elf_elfheader (obfd)->e_flags = EF_SH_MERGE_MACH (old_flags, new_flags); | |
2364 | ||
2365 | return sh_elf_set_mach_from_flags (obfd); | |
2366 | } | |
2367 | ||
252b5132 RH |
2368 | #define TARGET_BIG_SYM bfd_elf32_sh_vec |
2369 | #define TARGET_BIG_NAME "elf32-sh" | |
2370 | #define TARGET_LITTLE_SYM bfd_elf32_shl_vec | |
2371 | #define TARGET_LITTLE_NAME "elf32-shl" | |
2372 | #define ELF_ARCH bfd_arch_sh | |
2373 | #define ELF_MACHINE_CODE EM_SH | |
2374 | #define ELF_MAXPAGESIZE 0x1 | |
2375 | ||
2376 | #define elf_symbol_leading_char '_' | |
2377 | ||
2378 | #define bfd_elf32_bfd_reloc_type_lookup sh_elf_reloc_type_lookup | |
2379 | #define elf_info_to_howto sh_elf_info_to_howto | |
2380 | #define bfd_elf32_bfd_relax_section sh_elf_relax_section | |
2381 | #define elf_backend_relocate_section sh_elf_relocate_section | |
2382 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
2383 | sh_elf_get_relocated_section_contents | |
d4845d57 JR |
2384 | #define elf_backend_object_p sh_elf_set_mach_from_flags |
2385 | #define bfd_elf32_bfd_set_private_bfd_flags \ | |
2386 | sh_elf_set_private_flags | |
2387 | #define bfd_elf32_bfd_copy_private_bfd_data \ | |
2388 | sh_elf_copy_private_data | |
875f7f69 | 2389 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
d4845d57 | 2390 | sh_elf_merge_private_data |
252b5132 RH |
2391 | |
2392 | #define elf_backend_gc_mark_hook sh_elf_gc_mark_hook | |
2393 | #define elf_backend_gc_sweep_hook sh_elf_gc_sweep_hook | |
2394 | #define elf_backend_check_relocs sh_elf_check_relocs | |
2395 | ||
2396 | #define elf_backend_can_gc_sections 1 | |
2397 | #include "elf32-target.h" |