Commit | Line | Data |
---|---|---|
a75473eb | 1 | /* IQ2000-specific support for 32-bit ELF. |
9553c638 | 2 | Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. |
a75473eb | 3 | |
58852c27 | 4 | This file is part of BFD, the Binary File Descriptor library. |
a75473eb | 5 | |
58852c27 NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
a75473eb | 10 | |
58852c27 NC |
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. | |
a75473eb | 15 | |
58852c27 NC |
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 | |
3e110533 | 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
a75473eb SC |
19 | |
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "libbfd.h" | |
23 | #include "elf-bfd.h" | |
24 | #include "elf/iq2000.h" | |
25 | ||
26 | /* Forward declarations. */ | |
27 | ||
58852c27 | 28 | static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
a75473eb SC |
29 | |
30 | \f | |
31 | static reloc_howto_type iq2000_elf_howto_table [] = | |
32 | { | |
33 | /* This reloc does nothing. */ | |
34 | ||
35 | HOWTO (R_IQ2000_NONE, /* type */ | |
36 | 0, /* rightshift */ | |
37 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
38 | 32, /* bitsize */ | |
39 | FALSE, /* pc_relative */ | |
40 | 0, /* bitpos */ | |
41 | complain_overflow_bitfield, /* complain_on_overflow */ | |
42 | bfd_elf_generic_reloc, /* special_function */ | |
43 | "R_IQ2000_NONE", /* name */ | |
44 | FALSE, /* partial_inplace */ | |
45 | 0, /* src_mask */ | |
46 | 0, /* dst_mask */ | |
47 | FALSE), /* pcrel_offset */ | |
48 | ||
49 | /* A 16 bit absolute relocation. */ | |
50 | HOWTO (R_IQ2000_16, /* type */ | |
51 | 0, /* rightshift */ | |
52 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
53 | 16, /* bitsize */ | |
54 | FALSE, /* pc_relative */ | |
55 | 0, /* bitpos */ | |
56 | complain_overflow_bitfield, /* complain_on_overflow */ | |
57 | bfd_elf_generic_reloc, /* special_function */ | |
58 | "R_IQ2000_16", /* name */ | |
59 | FALSE, /* partial_inplace */ | |
60 | 0x0000, /* src_mask */ | |
61 | 0xffff, /* dst_mask */ | |
62 | FALSE), /* pcrel_offset */ | |
63 | ||
64 | /* A 32 bit absolute relocation. */ | |
65 | HOWTO (R_IQ2000_32, /* type */ | |
66 | 0, /* rightshift */ | |
67 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
68 | 31, /* bitsize */ | |
69 | FALSE, /* pc_relative */ | |
70 | 0, /* bitpos */ | |
71 | complain_overflow_bitfield, /* complain_on_overflow */ | |
72 | bfd_elf_generic_reloc, /* special_function */ | |
73 | "R_IQ2000_32", /* name */ | |
74 | FALSE, /* partial_inplace */ | |
75 | 0x00000000, /* src_mask */ | |
76 | 0x7fffffff, /* dst_mask */ | |
77 | FALSE), /* pcrel_offset */ | |
78 | ||
79 | /* 26 bit branch address. */ | |
80 | HOWTO (R_IQ2000_26, /* type */ | |
81 | 2, /* rightshift */ | |
82 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
83 | 26, /* bitsize */ | |
84 | FALSE, /* pc_relative */ | |
85 | 0, /* bitpos */ | |
86 | complain_overflow_dont, /* complain_on_overflow */ | |
87 | /* This needs complex overflow | |
88 | detection, because the upper four | |
89 | bits must match the PC. */ | |
90 | bfd_elf_generic_reloc, /* special_function */ | |
91 | "R_IQ2000_26", /* name */ | |
92 | FALSE, /* partial_inplace */ | |
93 | 0x00000000, /* src_mask */ | |
94 | 0x03ffffff, /* dst_mask */ | |
95 | FALSE), /* pcrel_offset */ | |
96 | ||
97 | /* 16 bit PC relative reference. */ | |
98 | HOWTO (R_IQ2000_PC16, /* type */ | |
99 | 2, /* rightshift */ | |
100 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
101 | 16, /* bitsize */ | |
102 | TRUE, /* pc_relative */ | |
103 | 0, /* bitpos */ | |
104 | complain_overflow_signed, /* complain_on_overflow */ | |
105 | bfd_elf_generic_reloc, /* special_function */ | |
106 | "R_IQ2000_PC16", /* name */ | |
107 | FALSE, /* partial_inplace */ | |
108 | 0x0000, /* src_mask */ | |
109 | 0xffff, /* dst_mask */ | |
110 | TRUE), /* pcrel_offset */ | |
111 | ||
112 | /* high 16 bits of symbol value. */ | |
113 | HOWTO (R_IQ2000_HI16, /* type */ | |
114 | 16, /* rightshift */ | |
115 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
116 | 15, /* bitsize */ | |
117 | FALSE, /* pc_relative */ | |
118 | 0, /* bitpos */ | |
119 | complain_overflow_dont, /* complain_on_overflow */ | |
120 | iq2000_elf_howto_hi16_reloc, /* special_function */ | |
121 | "R_IQ2000_HI16", /* name */ | |
122 | FALSE, /* partial_inplace */ | |
123 | 0x0000, /* src_mask */ | |
124 | 0x7fff, /* dst_mask */ | |
125 | FALSE), /* pcrel_offset */ | |
126 | ||
127 | /* Low 16 bits of symbol value. */ | |
128 | HOWTO (R_IQ2000_LO16, /* type */ | |
129 | 0, /* rightshift */ | |
130 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
131 | 16, /* bitsize */ | |
132 | FALSE, /* pc_relative */ | |
133 | 0, /* bitpos */ | |
134 | complain_overflow_dont, /* complain_on_overflow */ | |
135 | bfd_elf_generic_reloc, /* special_function */ | |
136 | "R_IQ2000_LO16", /* name */ | |
137 | FALSE, /* partial_inplace */ | |
138 | 0x0000, /* src_mask */ | |
139 | 0xffff, /* dst_mask */ | |
140 | FALSE), /* pcrel_offset */ | |
141 | ||
142 | /* 16-bit jump offset. */ | |
143 | HOWTO (R_IQ2000_OFFSET_16, /* type */ | |
144 | 2, /* rightshift */ | |
145 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
146 | 16, /* bitsize */ | |
147 | FALSE, /* pc_relative */ | |
148 | 0, /* bitpos */ | |
149 | complain_overflow_dont, /* complain_on_overflow */ | |
150 | bfd_elf_generic_reloc, /* special_function */ | |
151 | "R_IQ2000_OFFSET_16", /* name */ | |
152 | FALSE, /* partial_inplace */ | |
153 | 0x0000, /* src_mask */ | |
154 | 0xffff, /* dst_mask */ | |
155 | FALSE), /* pcrel_offset */ | |
156 | ||
157 | /* 21-bit jump offset. */ | |
158 | HOWTO (R_IQ2000_OFFSET_21, /* type */ | |
159 | 2, /* rightshift */ | |
160 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
161 | 21, /* bitsize */ | |
162 | FALSE, /* pc_relative */ | |
163 | 0, /* bitpos */ | |
164 | complain_overflow_dont, /* complain_on_overflow */ | |
165 | bfd_elf_generic_reloc, /* special_function */ | |
166 | "R_IQ2000_OFFSET_21", /* name */ | |
167 | FALSE, /* partial_inplace */ | |
168 | 0x000000, /* src_mask */ | |
169 | 0x1fffff, /* dst_mask */ | |
170 | FALSE), /* pcrel_offset */ | |
171 | ||
172 | /* unsigned high 16 bits of value. */ | |
173 | HOWTO (R_IQ2000_OFFSET_21, /* type */ | |
174 | 16, /* rightshift */ | |
175 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
176 | 16, /* bitsize */ | |
177 | FALSE, /* pc_relative */ | |
178 | 0, /* bitpos */ | |
179 | complain_overflow_dont, /* complain_on_overflow */ | |
180 | bfd_elf_generic_reloc, /* special_function */ | |
181 | "R_IQ2000_UHI16", /* name */ | |
182 | FALSE, /* partial_inplace */ | |
183 | 0x0000, /* src_mask */ | |
184 | 0x7fff, /* dst_mask */ | |
185 | FALSE), /* pcrel_offset */ | |
186 | ||
187 | /* A 32 bit absolute debug relocation. */ | |
188 | HOWTO (R_IQ2000_32_DEBUG, /* type */ | |
189 | 0, /* rightshift */ | |
190 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
191 | 32, /* bitsize */ | |
192 | FALSE, /* pc_relative */ | |
193 | 0, /* bitpos */ | |
194 | complain_overflow_bitfield, /* complain_on_overflow */ | |
195 | bfd_elf_generic_reloc, /* special_function */ | |
196 | "R_IQ2000_32", /* name */ | |
197 | FALSE, /* partial_inplace */ | |
198 | 0x00000000, /* src_mask */ | |
199 | 0xffffffff, /* dst_mask */ | |
200 | FALSE), /* pcrel_offset */ | |
201 | ||
202 | }; | |
203 | ||
204 | /* GNU extension to record C++ vtable hierarchy. */ | |
205 | static reloc_howto_type iq2000_elf_vtinherit_howto = | |
206 | HOWTO (R_IQ2000_GNU_VTINHERIT, /* type */ | |
207 | 0, /* rightshift */ | |
208 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
209 | 0, /* bitsize */ | |
210 | FALSE, /* pc_relative */ | |
211 | 0, /* bitpos */ | |
212 | complain_overflow_dont, /* complain_on_overflow */ | |
213 | NULL, /* special_function */ | |
214 | "R_IQ2000_GNU_VTINHERIT", /* name */ | |
215 | FALSE, /* partial_inplace */ | |
216 | 0, /* src_mask */ | |
217 | 0, /* dst_mask */ | |
218 | FALSE); /* pcrel_offset */ | |
219 | ||
220 | /* GNU extension to record C++ vtable member usage. */ | |
221 | static reloc_howto_type iq2000_elf_vtentry_howto = | |
222 | HOWTO (R_IQ2000_GNU_VTENTRY, /* type */ | |
223 | 0, /* rightshift */ | |
224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
225 | 0, /* bitsize */ | |
226 | FALSE, /* pc_relative */ | |
227 | 0, /* bitpos */ | |
228 | complain_overflow_dont, /* complain_on_overflow */ | |
229 | NULL, /* special_function */ | |
230 | "R_IQ2000_GNU_VTENTRY", /* name */ | |
231 | FALSE, /* partial_inplace */ | |
232 | 0, /* src_mask */ | |
233 | 0, /* dst_mask */ | |
234 | FALSE); /* pcrel_offset */ | |
235 | ||
236 | \f | |
a75473eb | 237 | static bfd_reloc_status_type |
58852c27 NC |
238 | iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
239 | arelent *reloc_entry, | |
240 | asymbol *symbol, | |
241 | void * data, | |
242 | asection *input_section, | |
243 | bfd *output_bfd, | |
244 | char **error_message ATTRIBUTE_UNUSED) | |
a75473eb SC |
245 | { |
246 | bfd_reloc_status_type ret; | |
247 | bfd_vma relocation; | |
248 | ||
58852c27 NC |
249 | /* If we're relocating and this an external symbol, |
250 | we don't want to change anything. */ | |
a75473eb SC |
251 | if (output_bfd != (bfd *) NULL |
252 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
253 | && reloc_entry->addend == 0) | |
254 | { | |
255 | reloc_entry->address += input_section->output_offset; | |
256 | return bfd_reloc_ok; | |
257 | } | |
258 | ||
259 | if (bfd_is_com_section (symbol->section)) | |
260 | relocation = 0; | |
261 | else | |
262 | relocation = symbol->value; | |
263 | ||
264 | relocation += symbol->section->output_section->vma; | |
265 | relocation += symbol->section->output_offset; | |
266 | relocation += reloc_entry->addend; | |
267 | ||
58852c27 | 268 | /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */ |
a75473eb SC |
269 | if (relocation & 0x8000) |
270 | reloc_entry->addend += 0x10000; | |
271 | ||
272 | /* Now do the reloc in the usual way. */ | |
273 | ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
274 | input_section, output_bfd, error_message); | |
275 | ||
58852c27 | 276 | /* Put it back the way it was. */ |
a75473eb SC |
277 | if (relocation & 0x8000) |
278 | reloc_entry->addend -= 0x10000; | |
279 | ||
280 | return ret; | |
281 | } | |
282 | ||
283 | static bfd_reloc_status_type | |
58852c27 NC |
284 | iq2000_elf_relocate_hi16 (bfd *input_bfd, |
285 | Elf_Internal_Rela *relhi, | |
286 | bfd_byte *contents, | |
287 | bfd_vma value) | |
a75473eb SC |
288 | { |
289 | bfd_vma insn; | |
290 | ||
291 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); | |
292 | ||
293 | value += relhi->r_addend; | |
58852c27 | 294 | value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */ |
a75473eb | 295 | |
58852c27 NC |
296 | /* If top-bit of %lo value is on, this means that %lo will |
297 | sign-propagate and so we compensate by adding 1 to %hi value. */ | |
a75473eb SC |
298 | if (value & 0x8000) |
299 | value += 0x10000; | |
300 | ||
301 | value >>= 16; | |
302 | insn = ((insn & ~0xFFFF) | value); | |
303 | ||
304 | bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); | |
305 | return bfd_reloc_ok; | |
306 | } | |
307 | ||
6c408f53 NC |
308 | /* Map BFD reloc types to IQ2000 ELF reloc types. */ |
309 | ||
a75473eb | 310 | static reloc_howto_type * |
de52dba4 AM |
311 | iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
312 | bfd_reloc_code_real_type code) | |
a75473eb SC |
313 | { |
314 | /* Note that the iq2000_elf_howto_table is indxed by the R_ | |
315 | constants. Thus, the order that the howto records appear in the | |
316 | table *must* match the order of the relocation types defined in | |
317 | include/elf/iq2000.h. */ | |
318 | ||
319 | switch (code) | |
320 | { | |
321 | case BFD_RELOC_NONE: | |
322 | return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE]; | |
323 | case BFD_RELOC_16: | |
324 | return &iq2000_elf_howto_table[ (int) R_IQ2000_16]; | |
325 | case BFD_RELOC_32: | |
326 | return &iq2000_elf_howto_table[ (int) R_IQ2000_32]; | |
327 | case BFD_RELOC_MIPS_JMP: | |
328 | return &iq2000_elf_howto_table[ (int) R_IQ2000_26]; | |
329 | case BFD_RELOC_IQ2000_OFFSET_16: | |
330 | return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16]; | |
331 | case BFD_RELOC_IQ2000_OFFSET_21: | |
332 | return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21]; | |
333 | case BFD_RELOC_16_PCREL_S2: | |
334 | return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16]; | |
335 | case BFD_RELOC_HI16: | |
336 | return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16]; | |
337 | case BFD_RELOC_IQ2000_UHI16: | |
338 | return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16]; | |
339 | case BFD_RELOC_LO16: | |
340 | return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16]; | |
341 | case BFD_RELOC_VTABLE_INHERIT: | |
342 | return &iq2000_elf_vtinherit_howto; | |
343 | case BFD_RELOC_VTABLE_ENTRY: | |
344 | return &iq2000_elf_vtentry_howto; | |
345 | default: | |
346 | /* Pacify gcc -Wall. */ | |
347 | return NULL; | |
348 | } | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | \f | |
353 | /* Perform a single relocation. By default we use the standard BFD | |
354 | routines. */ | |
355 | ||
356 | static bfd_reloc_status_type | |
58852c27 NC |
357 | iq2000_final_link_relocate (reloc_howto_type * howto, |
358 | bfd * input_bfd, | |
359 | asection * input_section, | |
360 | bfd_byte * contents, | |
361 | Elf_Internal_Rela * rel, | |
362 | bfd_vma relocation) | |
a75473eb SC |
363 | { |
364 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
365 | contents, rel->r_offset, | |
366 | relocation, rel->r_addend); | |
367 | } | |
368 | \f | |
369 | /* Set the howto pointer for a IQ2000 ELF reloc. */ | |
370 | ||
371 | static void | |
58852c27 NC |
372 | iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, |
373 | arelent * cache_ptr, | |
374 | Elf_Internal_Rela * dst) | |
a75473eb SC |
375 | { |
376 | unsigned int r_type; | |
377 | ||
378 | r_type = ELF32_R_TYPE (dst->r_info); | |
379 | switch (r_type) | |
380 | { | |
381 | case R_IQ2000_GNU_VTINHERIT: | |
382 | cache_ptr->howto = & iq2000_elf_vtinherit_howto; | |
383 | break; | |
384 | ||
385 | case R_IQ2000_GNU_VTENTRY: | |
386 | cache_ptr->howto = & iq2000_elf_vtentry_howto; | |
387 | break; | |
388 | ||
389 | default: | |
390 | cache_ptr->howto = & iq2000_elf_howto_table [r_type]; | |
391 | break; | |
392 | } | |
393 | } | |
394 | ||
395 | /* Look through the relocs for a section during the first phase. | |
396 | Since we don't do .gots or .plts, we just need to consider the | |
397 | virtual table relocs for gc. */ | |
398 | ||
399 | static bfd_boolean | |
58852c27 NC |
400 | iq2000_elf_check_relocs (bfd *abfd, |
401 | struct bfd_link_info *info, | |
402 | asection *sec, | |
403 | const Elf_Internal_Rela *relocs) | |
a75473eb SC |
404 | { |
405 | Elf_Internal_Shdr *symtab_hdr; | |
406 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
60d8b524 AM |
407 | const Elf_Internal_Rela *rel; |
408 | const Elf_Internal_Rela *rel_end; | |
409 | bfd_boolean changed = FALSE; | |
a75473eb | 410 | |
1049f94e | 411 | if (info->relocatable) |
a75473eb SC |
412 | return TRUE; |
413 | ||
414 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
415 | sym_hashes = elf_sym_hashes (abfd); | |
58852c27 | 416 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
a75473eb SC |
417 | if (!elf_bad_symtab (abfd)) |
418 | sym_hashes_end -= symtab_hdr->sh_info; | |
419 | ||
420 | rel_end = relocs + sec->reloc_count; | |
421 | for (rel = relocs; rel < rel_end; rel++) | |
422 | { | |
423 | struct elf_link_hash_entry *h; | |
424 | unsigned long r_symndx; | |
425 | ||
426 | r_symndx = ELF32_R_SYM (rel->r_info); | |
427 | if (r_symndx < symtab_hdr->sh_info) | |
428 | h = NULL; | |
429 | else | |
430 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
431 | ||
432 | switch (ELF32_R_TYPE (rel->r_info)) | |
433 | { | |
58852c27 NC |
434 | /* This relocation describes the C++ object vtable |
435 | hierarchy. Reconstruct it for later use during GC. */ | |
a75473eb | 436 | case R_IQ2000_GNU_VTINHERIT: |
c152c796 | 437 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
a75473eb SC |
438 | return FALSE; |
439 | break; | |
440 | ||
58852c27 NC |
441 | /* This relocation describes which C++ vtable entries |
442 | are actually used. Record for later use during GC. */ | |
a75473eb | 443 | case R_IQ2000_GNU_VTENTRY: |
c152c796 | 444 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
a75473eb SC |
445 | return FALSE; |
446 | break; | |
447 | ||
448 | case R_IQ2000_32: | |
58852c27 | 449 | /* For debug section, change to special harvard-aware relocations. */ |
a75473eb SC |
450 | if (memcmp (sec->name, ".debug", 6) == 0 |
451 | || memcmp (sec->name, ".stab", 5) == 0 | |
452 | || memcmp (sec->name, ".eh_frame", 9) == 0) | |
60d8b524 AM |
453 | { |
454 | ((Elf_Internal_Rela *) rel)->r_info | |
455 | = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); | |
456 | changed = TRUE; | |
457 | } | |
a75473eb SC |
458 | break; |
459 | } | |
460 | } | |
60d8b524 AM |
461 | |
462 | if (changed) | |
463 | /* Note that we've changed relocs, otherwise if !info->keep_memory | |
464 | we'll free the relocs and lose our changes. */ | |
d5cb4bb8 | 465 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; |
60d8b524 | 466 | |
a75473eb SC |
467 | return TRUE; |
468 | } | |
469 | ||
470 | \f | |
471 | /* Relocate a IQ2000 ELF section. | |
472 | There is some attempt to make this function usable for many architectures, | |
473 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
474 | if only to serve as a learning tool. | |
475 | ||
476 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
477 | to handle the relocations for a section. | |
478 | ||
479 | The relocs are always passed as Rela structures; if the section | |
480 | actually uses Rel structures, the r_addend field will always be | |
481 | zero. | |
482 | ||
483 | This function is responsible for adjusting the section contents as | |
1049f94e | 484 | necessary, and (if using Rela relocs and generating a relocatable |
a75473eb SC |
485 | output file) adjusting the reloc addend as necessary. |
486 | ||
487 | This function does not have to worry about setting the reloc | |
488 | address or the reloc symbol index. | |
489 | ||
490 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
491 | ||
492 | LOCAL_SECTIONS is an array giving the section in the input file | |
493 | corresponding to the st_shndx field of each local symbol. | |
494 | ||
495 | The global hash table entry for the global symbols can be found | |
496 | via elf_sym_hashes (input_bfd). | |
497 | ||
1049f94e | 498 | When generating relocatable output, this function must handle |
a75473eb SC |
499 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
500 | going to be the section symbol corresponding to the output | |
501 | section, which means that the addend must be adjusted | |
502 | accordingly. */ | |
503 | ||
504 | static bfd_boolean | |
58852c27 NC |
505 | iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, |
506 | struct bfd_link_info * info, | |
507 | bfd * input_bfd, | |
508 | asection * input_section, | |
509 | bfd_byte * contents, | |
510 | Elf_Internal_Rela * relocs, | |
511 | Elf_Internal_Sym * local_syms, | |
512 | asection ** local_sections) | |
a75473eb SC |
513 | { |
514 | Elf_Internal_Shdr * symtab_hdr; | |
515 | struct elf_link_hash_entry ** sym_hashes; | |
516 | Elf_Internal_Rela * rel; | |
517 | Elf_Internal_Rela * relend; | |
518 | ||
d5cb4bb8 NC |
519 | if (info->relocatable) |
520 | return TRUE; | |
521 | ||
a75473eb SC |
522 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
523 | sym_hashes = elf_sym_hashes (input_bfd); | |
524 | relend = relocs + input_section->reloc_count; | |
525 | ||
526 | for (rel = relocs; rel < relend; rel ++) | |
527 | { | |
528 | reloc_howto_type * howto; | |
529 | unsigned long r_symndx; | |
530 | Elf_Internal_Sym * sym; | |
531 | asection * sec; | |
532 | struct elf_link_hash_entry * h; | |
533 | bfd_vma relocation; | |
534 | bfd_reloc_status_type r; | |
535 | const char * name = NULL; | |
536 | int r_type; | |
537 | ||
538 | r_type = ELF32_R_TYPE (rel->r_info); | |
539 | ||
540 | if ( r_type == R_IQ2000_GNU_VTINHERIT | |
541 | || r_type == R_IQ2000_GNU_VTENTRY) | |
542 | continue; | |
543 | ||
544 | r_symndx = ELF32_R_SYM (rel->r_info); | |
545 | ||
546 | /* This is a final link. */ | |
547 | howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
548 | h = NULL; | |
549 | sym = NULL; | |
550 | sec = NULL; | |
551 | ||
552 | if (r_symndx < symtab_hdr->sh_info) | |
553 | { | |
554 | sym = local_syms + r_symndx; | |
555 | sec = local_sections [r_symndx]; | |
556 | relocation = (sec->output_section->vma | |
557 | + sec->output_offset | |
558 | + sym->st_value); | |
559 | ||
560 | name = bfd_elf_string_from_elf_section | |
561 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
562 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
a75473eb SC |
563 | } |
564 | else | |
565 | { | |
560e09e9 NC |
566 | bfd_boolean unresolved_reloc; |
567 | bfd_boolean warned; | |
568 | ||
b2a8e766 AM |
569 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
570 | r_symndx, symtab_hdr, sym_hashes, | |
571 | h, sec, relocation, | |
572 | unresolved_reloc, warned); | |
a75473eb SC |
573 | |
574 | name = h->root.root.string; | |
a75473eb SC |
575 | } |
576 | ||
577 | switch (r_type) | |
578 | { | |
579 | case R_IQ2000_HI16: | |
580 | r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); | |
581 | break; | |
582 | ||
583 | case R_IQ2000_PC16: | |
584 | rel->r_addend -= 4; | |
585 | /* Fall through. */ | |
586 | ||
587 | default: | |
588 | r = iq2000_final_link_relocate (howto, input_bfd, input_section, | |
589 | contents, rel, relocation); | |
590 | break; | |
591 | } | |
592 | ||
593 | if (r != bfd_reloc_ok) | |
594 | { | |
595 | const char * msg = (const char *) NULL; | |
596 | ||
597 | switch (r) | |
598 | { | |
599 | case bfd_reloc_overflow: | |
600 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
601 | (info, (h ? &h->root : NULL), name, howto->name, |
602 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
a75473eb SC |
603 | break; |
604 | ||
605 | case bfd_reloc_undefined: | |
606 | r = info->callbacks->undefined_symbol | |
607 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
608 | break; | |
609 | ||
610 | case bfd_reloc_outofrange: | |
611 | msg = _("internal error: out of range error"); | |
612 | break; | |
613 | ||
614 | case bfd_reloc_notsupported: | |
615 | msg = _("internal error: unsupported relocation error"); | |
616 | break; | |
617 | ||
618 | case bfd_reloc_dangerous: | |
619 | msg = _("internal error: dangerous relocation"); | |
620 | break; | |
621 | ||
622 | default: | |
623 | msg = _("internal error: unknown error"); | |
624 | break; | |
625 | } | |
626 | ||
627 | if (msg) | |
628 | r = info->callbacks->warning | |
629 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
630 | ||
631 | if (! r) | |
632 | return FALSE; | |
633 | } | |
634 | } | |
635 | ||
636 | return TRUE; | |
637 | } | |
638 | \f | |
639 | ||
640 | /* Update the got entry reference counts for the section being | |
641 | removed. */ | |
642 | ||
643 | static bfd_boolean | |
58852c27 NC |
644 | iq2000_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED, |
645 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
646 | asection * sec ATTRIBUTE_UNUSED, | |
647 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED) | |
a75473eb SC |
648 | { |
649 | return TRUE; | |
650 | } | |
651 | ||
652 | /* Return the section that should be marked against GC for a given | |
653 | relocation. */ | |
654 | ||
655 | static asection * | |
58852c27 NC |
656 | iq2000_elf_gc_mark_hook (asection * sec, |
657 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
658 | Elf_Internal_Rela * rel, | |
659 | struct elf_link_hash_entry * h, | |
660 | Elf_Internal_Sym * sym) | |
a75473eb | 661 | { |
58852c27 NC |
662 | if (h == NULL) |
663 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
664 | ||
665 | switch (ELF32_R_TYPE (rel->r_info)) | |
a75473eb | 666 | { |
58852c27 NC |
667 | case R_IQ2000_GNU_VTINHERIT: |
668 | case R_IQ2000_GNU_VTENTRY: | |
669 | break; | |
a75473eb | 670 | |
58852c27 NC |
671 | default: |
672 | switch (h->root.type) | |
673 | { | |
674 | case bfd_link_hash_defined: | |
675 | case bfd_link_hash_defweak: | |
676 | return h->root.u.def.section; | |
a75473eb | 677 | |
58852c27 NC |
678 | case bfd_link_hash_common: |
679 | return h->root.u.c.p->section; | |
a75473eb | 680 | |
58852c27 NC |
681 | default: |
682 | break; | |
a75473eb SC |
683 | } |
684 | } | |
a75473eb SC |
685 | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | \f | |
690 | /* Return the MACH for an e_flags value. */ | |
691 | ||
692 | static int | |
58852c27 | 693 | elf32_iq2000_machine (bfd *abfd) |
a75473eb SC |
694 | { |
695 | switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) | |
696 | { | |
58852c27 NC |
697 | case EF_IQ2000_CPU_IQ10: |
698 | return bfd_mach_iq10; | |
a75473eb | 699 | |
58852c27 NC |
700 | case EF_IQ2000_CPU_IQ2000: |
701 | default: | |
702 | return bfd_mach_iq2000; | |
703 | } | |
a75473eb SC |
704 | } |
705 | ||
706 | \f | |
707 | /* Function to set the ELF flag bits. */ | |
708 | ||
709 | static bfd_boolean | |
58852c27 | 710 | iq2000_elf_set_private_flags (bfd *abfd, flagword flags) |
a75473eb SC |
711 | { |
712 | elf_elfheader (abfd)->e_flags = flags; | |
713 | elf_flags_init (abfd) = TRUE; | |
714 | return TRUE; | |
715 | } | |
716 | ||
717 | /* Copy backend specific data from one object module to another. */ | |
718 | ||
719 | static bfd_boolean | |
58852c27 | 720 | iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
a75473eb SC |
721 | { |
722 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
723 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
724 | return TRUE; | |
725 | ||
726 | BFD_ASSERT (!elf_flags_init (obfd) | |
727 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
728 | ||
729 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
730 | elf_flags_init (obfd) = TRUE; | |
731 | return TRUE; | |
732 | } | |
733 | ||
58852c27 NC |
734 | /* Merge backend specific data from an object |
735 | file to the output object file when linking. */ | |
a75473eb SC |
736 | |
737 | static bfd_boolean | |
58852c27 | 738 | iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
a75473eb SC |
739 | { |
740 | flagword old_flags, old_partial; | |
741 | flagword new_flags, new_partial; | |
742 | bfd_boolean error = FALSE; | |
743 | char new_opt[80]; | |
744 | char old_opt[80]; | |
745 | ||
746 | new_opt[0] = old_opt[0] = '\0'; | |
747 | new_flags = elf_elfheader (ibfd)->e_flags; | |
748 | old_flags = elf_elfheader (obfd)->e_flags; | |
749 | ||
a75473eb SC |
750 | if (!elf_flags_init (obfd)) |
751 | { | |
752 | /* First call, no flags set. */ | |
753 | elf_flags_init (obfd) = TRUE; | |
754 | elf_elfheader (obfd)->e_flags = new_flags; | |
755 | } | |
756 | ||
58852c27 | 757 | else if (new_flags != old_flags) |
a75473eb | 758 | { |
58852c27 NC |
759 | /* Warn if different cpu is used, but allow a |
760 | specific cpu to override the generic cpu. */ | |
a75473eb SC |
761 | new_partial = (new_flags & EF_IQ2000_CPU_MASK); |
762 | old_partial = (old_flags & EF_IQ2000_CPU_MASK); | |
a75473eb | 763 | |
58852c27 | 764 | if (new_partial != old_partial) |
a75473eb SC |
765 | { |
766 | switch (new_partial) | |
767 | { | |
58852c27 NC |
768 | case EF_IQ2000_CPU_IQ10: |
769 | strcat (new_opt, " -m10"); | |
770 | break; | |
771 | ||
772 | default: | |
773 | case EF_IQ2000_CPU_IQ2000: | |
774 | strcat (new_opt, " -m2000"); | |
775 | break; | |
a75473eb SC |
776 | } |
777 | ||
778 | switch (old_partial) | |
779 | { | |
58852c27 NC |
780 | case EF_IQ2000_CPU_IQ10: |
781 | strcat (old_opt, " -m10"); | |
782 | break; | |
783 | ||
784 | default: | |
785 | case EF_IQ2000_CPU_IQ2000: | |
786 | strcat (old_opt, " -m2000"); | |
787 | break; | |
a75473eb SC |
788 | } |
789 | } | |
790 | ||
791 | /* Print out any mismatches from above. */ | |
792 | if (new_opt[0]) | |
793 | { | |
794 | error = TRUE; | |
58852c27 | 795 | _bfd_error_handler |
a75473eb SC |
796 | (_("%s: compiled with %s and linked with modules compiled with %s"), |
797 | bfd_get_filename (ibfd), new_opt, old_opt); | |
798 | } | |
799 | ||
800 | new_flags &= ~ EF_IQ2000_ALL_FLAGS; | |
801 | old_flags &= ~ EF_IQ2000_ALL_FLAGS; | |
802 | ||
803 | /* Warn about any other mismatches. */ | |
804 | if (new_flags != old_flags) | |
805 | { | |
806 | error = TRUE; | |
58852c27 NC |
807 | |
808 | _bfd_error_handler | |
a75473eb SC |
809 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
810 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); | |
811 | } | |
812 | } | |
813 | ||
814 | if (error) | |
815 | bfd_set_error (bfd_error_bad_value); | |
816 | ||
817 | return !error; | |
818 | } | |
819 | ||
820 | \f | |
821 | static bfd_boolean | |
58852c27 | 822 | iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr) |
a75473eb SC |
823 | { |
824 | FILE *file = (FILE *) ptr; | |
825 | flagword flags; | |
826 | ||
827 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
828 | ||
829 | /* Print normal ELF private data. */ | |
830 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
831 | ||
832 | flags = elf_elfheader (abfd)->e_flags; | |
833 | fprintf (file, _("private flags = 0x%lx:"), (long)flags); | |
834 | ||
835 | switch (flags & EF_IQ2000_CPU_MASK) | |
836 | { | |
58852c27 NC |
837 | case EF_IQ2000_CPU_IQ10: |
838 | fprintf (file, " -m10"); | |
839 | break; | |
840 | case EF_IQ2000_CPU_IQ2000: | |
841 | fprintf (file, " -m2000"); | |
842 | break; | |
843 | default: | |
844 | break; | |
a75473eb SC |
845 | } |
846 | ||
847 | fputc ('\n', file); | |
60d8b524 | 848 | return TRUE; |
a75473eb SC |
849 | } |
850 | ||
851 | static | |
852 | bfd_boolean | |
58852c27 | 853 | iq2000_elf_object_p (bfd *abfd) |
a75473eb | 854 | { |
a75473eb SC |
855 | bfd_default_set_arch_mach (abfd, bfd_arch_iq2000, |
856 | elf32_iq2000_machine (abfd)); | |
857 | return TRUE; | |
858 | } | |
859 | ||
860 | \f | |
861 | #define ELF_ARCH bfd_arch_iq2000 | |
862 | #define ELF_MACHINE_CODE EM_IQ2000 | |
863 | #define ELF_MAXPAGESIZE 0x1000 | |
864 | ||
865 | #define TARGET_BIG_SYM bfd_elf32_iq2000_vec | |
866 | #define TARGET_BIG_NAME "elf32-iq2000" | |
867 | ||
868 | #define elf_info_to_howto_rel NULL | |
869 | #define elf_info_to_howto iq2000_info_to_howto_rela | |
870 | #define elf_backend_relocate_section iq2000_elf_relocate_section | |
871 | #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook | |
872 | #define elf_backend_gc_sweep_hook iq2000_elf_gc_sweep_hook | |
873 | #define elf_backend_check_relocs iq2000_elf_check_relocs | |
874 | #define elf_backend_object_p iq2000_elf_object_p | |
875 | #define elf_backend_rela_normal 1 | |
876 | ||
877 | #define elf_backend_can_gc_sections 1 | |
878 | ||
879 | #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup | |
880 | #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags | |
881 | #define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data | |
882 | #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data | |
883 | #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data | |
884 | ||
885 | #include "elf32-target.h" |