Commit | Line | Data |
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a75473eb | 1 | /* IQ2000-specific support for 32-bit ELF. |
b2a8e766 | 2 | Copyright (C) 2003, 2004 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 | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 | |
237 | /* Map BFD reloc types to IQ2000 ELF reloc types. */ | |
238 | ||
239 | struct iq2000_reloc_map | |
240 | { | |
241 | bfd_reloc_code_real_type bfd_reloc_val; | |
242 | unsigned int iq2000_reloc_val; | |
243 | }; | |
244 | ||
245 | static const struct iq2000_reloc_map iq2000_reloc_map [] = | |
246 | { | |
247 | { BFD_RELOC_NONE, R_IQ2000_NONE }, | |
248 | { BFD_RELOC_16, R_IQ2000_16 }, | |
249 | { BFD_RELOC_32, R_IQ2000_32 }, | |
250 | { BFD_RELOC_MIPS_JMP, R_IQ2000_26 }, | |
251 | { BFD_RELOC_16_PCREL_S2, R_IQ2000_PC16 }, | |
252 | { BFD_RELOC_HI16, R_IQ2000_HI16 }, | |
253 | { BFD_RELOC_LO16, R_IQ2000_LO16 }, | |
254 | { BFD_RELOC_IQ2000_OFFSET_16,R_IQ2000_OFFSET_16 }, | |
255 | { BFD_RELOC_IQ2000_OFFSET_21,R_IQ2000_OFFSET_21 }, | |
256 | { BFD_RELOC_IQ2000_UHI16, R_IQ2000_UHI16 }, | |
257 | { BFD_RELOC_VTABLE_INHERIT, R_IQ2000_GNU_VTINHERIT }, | |
258 | { BFD_RELOC_VTABLE_ENTRY, R_IQ2000_GNU_VTENTRY }, | |
259 | }; | |
260 | ||
261 | static bfd_reloc_status_type | |
58852c27 NC |
262 | iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
263 | arelent *reloc_entry, | |
264 | asymbol *symbol, | |
265 | void * data, | |
266 | asection *input_section, | |
267 | bfd *output_bfd, | |
268 | char **error_message ATTRIBUTE_UNUSED) | |
a75473eb SC |
269 | { |
270 | bfd_reloc_status_type ret; | |
271 | bfd_vma relocation; | |
272 | ||
58852c27 NC |
273 | /* If we're relocating and this an external symbol, |
274 | we don't want to change anything. */ | |
a75473eb SC |
275 | if (output_bfd != (bfd *) NULL |
276 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
277 | && reloc_entry->addend == 0) | |
278 | { | |
279 | reloc_entry->address += input_section->output_offset; | |
280 | return bfd_reloc_ok; | |
281 | } | |
282 | ||
283 | if (bfd_is_com_section (symbol->section)) | |
284 | relocation = 0; | |
285 | else | |
286 | relocation = symbol->value; | |
287 | ||
288 | relocation += symbol->section->output_section->vma; | |
289 | relocation += symbol->section->output_offset; | |
290 | relocation += reloc_entry->addend; | |
291 | ||
58852c27 | 292 | /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */ |
a75473eb SC |
293 | if (relocation & 0x8000) |
294 | reloc_entry->addend += 0x10000; | |
295 | ||
296 | /* Now do the reloc in the usual way. */ | |
297 | ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
298 | input_section, output_bfd, error_message); | |
299 | ||
58852c27 | 300 | /* Put it back the way it was. */ |
a75473eb SC |
301 | if (relocation & 0x8000) |
302 | reloc_entry->addend -= 0x10000; | |
303 | ||
304 | return ret; | |
305 | } | |
306 | ||
307 | static bfd_reloc_status_type | |
58852c27 NC |
308 | iq2000_elf_relocate_hi16 (bfd *input_bfd, |
309 | Elf_Internal_Rela *relhi, | |
310 | bfd_byte *contents, | |
311 | bfd_vma value) | |
a75473eb SC |
312 | { |
313 | bfd_vma insn; | |
314 | ||
315 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); | |
316 | ||
317 | value += relhi->r_addend; | |
58852c27 | 318 | value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */ |
a75473eb | 319 | |
58852c27 NC |
320 | /* If top-bit of %lo value is on, this means that %lo will |
321 | sign-propagate and so we compensate by adding 1 to %hi value. */ | |
a75473eb SC |
322 | if (value & 0x8000) |
323 | value += 0x10000; | |
324 | ||
325 | value >>= 16; | |
326 | insn = ((insn & ~0xFFFF) | value); | |
327 | ||
328 | bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); | |
329 | return bfd_reloc_ok; | |
330 | } | |
331 | ||
332 | static reloc_howto_type * | |
de52dba4 AM |
333 | iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
334 | bfd_reloc_code_real_type code) | |
a75473eb SC |
335 | { |
336 | /* Note that the iq2000_elf_howto_table is indxed by the R_ | |
337 | constants. Thus, the order that the howto records appear in the | |
338 | table *must* match the order of the relocation types defined in | |
339 | include/elf/iq2000.h. */ | |
340 | ||
341 | switch (code) | |
342 | { | |
343 | case BFD_RELOC_NONE: | |
344 | return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE]; | |
345 | case BFD_RELOC_16: | |
346 | return &iq2000_elf_howto_table[ (int) R_IQ2000_16]; | |
347 | case BFD_RELOC_32: | |
348 | return &iq2000_elf_howto_table[ (int) R_IQ2000_32]; | |
349 | case BFD_RELOC_MIPS_JMP: | |
350 | return &iq2000_elf_howto_table[ (int) R_IQ2000_26]; | |
351 | case BFD_RELOC_IQ2000_OFFSET_16: | |
352 | return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16]; | |
353 | case BFD_RELOC_IQ2000_OFFSET_21: | |
354 | return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21]; | |
355 | case BFD_RELOC_16_PCREL_S2: | |
356 | return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16]; | |
357 | case BFD_RELOC_HI16: | |
358 | return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16]; | |
359 | case BFD_RELOC_IQ2000_UHI16: | |
360 | return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16]; | |
361 | case BFD_RELOC_LO16: | |
362 | return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16]; | |
363 | case BFD_RELOC_VTABLE_INHERIT: | |
364 | return &iq2000_elf_vtinherit_howto; | |
365 | case BFD_RELOC_VTABLE_ENTRY: | |
366 | return &iq2000_elf_vtentry_howto; | |
367 | default: | |
368 | /* Pacify gcc -Wall. */ | |
369 | return NULL; | |
370 | } | |
371 | return NULL; | |
372 | } | |
373 | ||
374 | \f | |
375 | /* Perform a single relocation. By default we use the standard BFD | |
376 | routines. */ | |
377 | ||
378 | static bfd_reloc_status_type | |
58852c27 NC |
379 | iq2000_final_link_relocate (reloc_howto_type * howto, |
380 | bfd * input_bfd, | |
381 | asection * input_section, | |
382 | bfd_byte * contents, | |
383 | Elf_Internal_Rela * rel, | |
384 | bfd_vma relocation) | |
a75473eb SC |
385 | { |
386 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
387 | contents, rel->r_offset, | |
388 | relocation, rel->r_addend); | |
389 | } | |
390 | \f | |
391 | /* Set the howto pointer for a IQ2000 ELF reloc. */ | |
392 | ||
393 | static void | |
58852c27 NC |
394 | iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, |
395 | arelent * cache_ptr, | |
396 | Elf_Internal_Rela * dst) | |
a75473eb SC |
397 | { |
398 | unsigned int r_type; | |
399 | ||
400 | r_type = ELF32_R_TYPE (dst->r_info); | |
401 | switch (r_type) | |
402 | { | |
403 | case R_IQ2000_GNU_VTINHERIT: | |
404 | cache_ptr->howto = & iq2000_elf_vtinherit_howto; | |
405 | break; | |
406 | ||
407 | case R_IQ2000_GNU_VTENTRY: | |
408 | cache_ptr->howto = & iq2000_elf_vtentry_howto; | |
409 | break; | |
410 | ||
411 | default: | |
412 | cache_ptr->howto = & iq2000_elf_howto_table [r_type]; | |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
417 | /* Look through the relocs for a section during the first phase. | |
418 | Since we don't do .gots or .plts, we just need to consider the | |
419 | virtual table relocs for gc. */ | |
420 | ||
421 | static bfd_boolean | |
58852c27 NC |
422 | iq2000_elf_check_relocs (bfd *abfd, |
423 | struct bfd_link_info *info, | |
424 | asection *sec, | |
425 | const Elf_Internal_Rela *relocs) | |
a75473eb SC |
426 | { |
427 | Elf_Internal_Shdr *symtab_hdr; | |
428 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
60d8b524 AM |
429 | const Elf_Internal_Rela *rel; |
430 | const Elf_Internal_Rela *rel_end; | |
431 | bfd_boolean changed = FALSE; | |
a75473eb | 432 | |
1049f94e | 433 | if (info->relocatable) |
a75473eb SC |
434 | return TRUE; |
435 | ||
436 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
437 | sym_hashes = elf_sym_hashes (abfd); | |
58852c27 | 438 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
a75473eb SC |
439 | if (!elf_bad_symtab (abfd)) |
440 | sym_hashes_end -= symtab_hdr->sh_info; | |
441 | ||
442 | rel_end = relocs + sec->reloc_count; | |
443 | for (rel = relocs; rel < rel_end; rel++) | |
444 | { | |
445 | struct elf_link_hash_entry *h; | |
446 | unsigned long r_symndx; | |
447 | ||
448 | r_symndx = ELF32_R_SYM (rel->r_info); | |
449 | if (r_symndx < symtab_hdr->sh_info) | |
450 | h = NULL; | |
451 | else | |
452 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
453 | ||
454 | switch (ELF32_R_TYPE (rel->r_info)) | |
455 | { | |
58852c27 NC |
456 | /* This relocation describes the C++ object vtable |
457 | hierarchy. Reconstruct it for later use during GC. */ | |
a75473eb | 458 | case R_IQ2000_GNU_VTINHERIT: |
c152c796 | 459 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
a75473eb SC |
460 | return FALSE; |
461 | break; | |
462 | ||
58852c27 NC |
463 | /* This relocation describes which C++ vtable entries |
464 | are actually used. Record for later use during GC. */ | |
a75473eb | 465 | case R_IQ2000_GNU_VTENTRY: |
c152c796 | 466 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
a75473eb SC |
467 | return FALSE; |
468 | break; | |
469 | ||
470 | case R_IQ2000_32: | |
58852c27 | 471 | /* For debug section, change to special harvard-aware relocations. */ |
a75473eb SC |
472 | if (memcmp (sec->name, ".debug", 6) == 0 |
473 | || memcmp (sec->name, ".stab", 5) == 0 | |
474 | || memcmp (sec->name, ".eh_frame", 9) == 0) | |
60d8b524 AM |
475 | { |
476 | ((Elf_Internal_Rela *) rel)->r_info | |
477 | = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); | |
478 | changed = TRUE; | |
479 | } | |
a75473eb SC |
480 | break; |
481 | } | |
482 | } | |
60d8b524 AM |
483 | |
484 | if (changed) | |
485 | /* Note that we've changed relocs, otherwise if !info->keep_memory | |
486 | we'll free the relocs and lose our changes. */ | |
d5cb4bb8 | 487 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; |
60d8b524 | 488 | |
a75473eb SC |
489 | return TRUE; |
490 | } | |
491 | ||
492 | \f | |
493 | /* Relocate a IQ2000 ELF section. | |
494 | There is some attempt to make this function usable for many architectures, | |
495 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
496 | if only to serve as a learning tool. | |
497 | ||
498 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
499 | to handle the relocations for a section. | |
500 | ||
501 | The relocs are always passed as Rela structures; if the section | |
502 | actually uses Rel structures, the r_addend field will always be | |
503 | zero. | |
504 | ||
505 | This function is responsible for adjusting the section contents as | |
1049f94e | 506 | necessary, and (if using Rela relocs and generating a relocatable |
a75473eb SC |
507 | output file) adjusting the reloc addend as necessary. |
508 | ||
509 | This function does not have to worry about setting the reloc | |
510 | address or the reloc symbol index. | |
511 | ||
512 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
513 | ||
514 | LOCAL_SECTIONS is an array giving the section in the input file | |
515 | corresponding to the st_shndx field of each local symbol. | |
516 | ||
517 | The global hash table entry for the global symbols can be found | |
518 | via elf_sym_hashes (input_bfd). | |
519 | ||
1049f94e | 520 | When generating relocatable output, this function must handle |
a75473eb SC |
521 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
522 | going to be the section symbol corresponding to the output | |
523 | section, which means that the addend must be adjusted | |
524 | accordingly. */ | |
525 | ||
526 | static bfd_boolean | |
58852c27 NC |
527 | iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, |
528 | struct bfd_link_info * info, | |
529 | bfd * input_bfd, | |
530 | asection * input_section, | |
531 | bfd_byte * contents, | |
532 | Elf_Internal_Rela * relocs, | |
533 | Elf_Internal_Sym * local_syms, | |
534 | asection ** local_sections) | |
a75473eb SC |
535 | { |
536 | Elf_Internal_Shdr * symtab_hdr; | |
537 | struct elf_link_hash_entry ** sym_hashes; | |
538 | Elf_Internal_Rela * rel; | |
539 | Elf_Internal_Rela * relend; | |
540 | ||
d5cb4bb8 NC |
541 | if (info->relocatable) |
542 | return TRUE; | |
543 | ||
a75473eb SC |
544 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
545 | sym_hashes = elf_sym_hashes (input_bfd); | |
546 | relend = relocs + input_section->reloc_count; | |
547 | ||
548 | for (rel = relocs; rel < relend; rel ++) | |
549 | { | |
550 | reloc_howto_type * howto; | |
551 | unsigned long r_symndx; | |
552 | Elf_Internal_Sym * sym; | |
553 | asection * sec; | |
554 | struct elf_link_hash_entry * h; | |
555 | bfd_vma relocation; | |
556 | bfd_reloc_status_type r; | |
557 | const char * name = NULL; | |
558 | int r_type; | |
559 | ||
560 | r_type = ELF32_R_TYPE (rel->r_info); | |
561 | ||
562 | if ( r_type == R_IQ2000_GNU_VTINHERIT | |
563 | || r_type == R_IQ2000_GNU_VTENTRY) | |
564 | continue; | |
565 | ||
566 | r_symndx = ELF32_R_SYM (rel->r_info); | |
567 | ||
568 | /* This is a final link. */ | |
569 | howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
570 | h = NULL; | |
571 | sym = NULL; | |
572 | sec = NULL; | |
573 | ||
574 | if (r_symndx < symtab_hdr->sh_info) | |
575 | { | |
576 | sym = local_syms + r_symndx; | |
577 | sec = local_sections [r_symndx]; | |
578 | relocation = (sec->output_section->vma | |
579 | + sec->output_offset | |
580 | + sym->st_value); | |
581 | ||
582 | name = bfd_elf_string_from_elf_section | |
583 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
584 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
a75473eb SC |
585 | } |
586 | else | |
587 | { | |
560e09e9 NC |
588 | bfd_boolean unresolved_reloc; |
589 | bfd_boolean warned; | |
590 | ||
b2a8e766 AM |
591 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
592 | r_symndx, symtab_hdr, sym_hashes, | |
593 | h, sec, relocation, | |
594 | unresolved_reloc, warned); | |
a75473eb SC |
595 | |
596 | name = h->root.root.string; | |
a75473eb SC |
597 | } |
598 | ||
599 | switch (r_type) | |
600 | { | |
601 | case R_IQ2000_HI16: | |
602 | r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); | |
603 | break; | |
604 | ||
605 | case R_IQ2000_PC16: | |
606 | rel->r_addend -= 4; | |
607 | /* Fall through. */ | |
608 | ||
609 | default: | |
610 | r = iq2000_final_link_relocate (howto, input_bfd, input_section, | |
611 | contents, rel, relocation); | |
612 | break; | |
613 | } | |
614 | ||
615 | if (r != bfd_reloc_ok) | |
616 | { | |
617 | const char * msg = (const char *) NULL; | |
618 | ||
619 | switch (r) | |
620 | { | |
621 | case bfd_reloc_overflow: | |
622 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
623 | (info, (h ? &h->root : NULL), name, howto->name, |
624 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
a75473eb SC |
625 | break; |
626 | ||
627 | case bfd_reloc_undefined: | |
628 | r = info->callbacks->undefined_symbol | |
629 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
630 | break; | |
631 | ||
632 | case bfd_reloc_outofrange: | |
633 | msg = _("internal error: out of range error"); | |
634 | break; | |
635 | ||
636 | case bfd_reloc_notsupported: | |
637 | msg = _("internal error: unsupported relocation error"); | |
638 | break; | |
639 | ||
640 | case bfd_reloc_dangerous: | |
641 | msg = _("internal error: dangerous relocation"); | |
642 | break; | |
643 | ||
644 | default: | |
645 | msg = _("internal error: unknown error"); | |
646 | break; | |
647 | } | |
648 | ||
649 | if (msg) | |
650 | r = info->callbacks->warning | |
651 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
652 | ||
653 | if (! r) | |
654 | return FALSE; | |
655 | } | |
656 | } | |
657 | ||
658 | return TRUE; | |
659 | } | |
660 | \f | |
661 | ||
662 | /* Update the got entry reference counts for the section being | |
663 | removed. */ | |
664 | ||
665 | static bfd_boolean | |
58852c27 NC |
666 | iq2000_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED, |
667 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
668 | asection * sec ATTRIBUTE_UNUSED, | |
669 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED) | |
a75473eb SC |
670 | { |
671 | return TRUE; | |
672 | } | |
673 | ||
674 | /* Return the section that should be marked against GC for a given | |
675 | relocation. */ | |
676 | ||
677 | static asection * | |
58852c27 NC |
678 | iq2000_elf_gc_mark_hook (asection * sec, |
679 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
680 | Elf_Internal_Rela * rel, | |
681 | struct elf_link_hash_entry * h, | |
682 | Elf_Internal_Sym * sym) | |
a75473eb | 683 | { |
58852c27 NC |
684 | if (h == NULL) |
685 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
686 | ||
687 | switch (ELF32_R_TYPE (rel->r_info)) | |
a75473eb | 688 | { |
58852c27 NC |
689 | case R_IQ2000_GNU_VTINHERIT: |
690 | case R_IQ2000_GNU_VTENTRY: | |
691 | break; | |
a75473eb | 692 | |
58852c27 NC |
693 | default: |
694 | switch (h->root.type) | |
695 | { | |
696 | case bfd_link_hash_defined: | |
697 | case bfd_link_hash_defweak: | |
698 | return h->root.u.def.section; | |
a75473eb | 699 | |
58852c27 NC |
700 | case bfd_link_hash_common: |
701 | return h->root.u.c.p->section; | |
a75473eb | 702 | |
58852c27 NC |
703 | default: |
704 | break; | |
a75473eb SC |
705 | } |
706 | } | |
a75473eb SC |
707 | |
708 | return NULL; | |
709 | } | |
710 | ||
711 | \f | |
712 | /* Return the MACH for an e_flags value. */ | |
713 | ||
714 | static int | |
58852c27 | 715 | elf32_iq2000_machine (bfd *abfd) |
a75473eb SC |
716 | { |
717 | switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) | |
718 | { | |
58852c27 NC |
719 | case EF_IQ2000_CPU_IQ10: |
720 | return bfd_mach_iq10; | |
a75473eb | 721 | |
58852c27 NC |
722 | case EF_IQ2000_CPU_IQ2000: |
723 | default: | |
724 | return bfd_mach_iq2000; | |
725 | } | |
a75473eb SC |
726 | } |
727 | ||
728 | \f | |
729 | /* Function to set the ELF flag bits. */ | |
730 | ||
731 | static bfd_boolean | |
58852c27 | 732 | iq2000_elf_set_private_flags (bfd *abfd, flagword flags) |
a75473eb SC |
733 | { |
734 | elf_elfheader (abfd)->e_flags = flags; | |
735 | elf_flags_init (abfd) = TRUE; | |
736 | return TRUE; | |
737 | } | |
738 | ||
739 | /* Copy backend specific data from one object module to another. */ | |
740 | ||
741 | static bfd_boolean | |
58852c27 | 742 | iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
a75473eb SC |
743 | { |
744 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
745 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
746 | return TRUE; | |
747 | ||
748 | BFD_ASSERT (!elf_flags_init (obfd) | |
749 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
750 | ||
751 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
752 | elf_flags_init (obfd) = TRUE; | |
753 | return TRUE; | |
754 | } | |
755 | ||
58852c27 NC |
756 | /* Merge backend specific data from an object |
757 | file to the output object file when linking. */ | |
a75473eb SC |
758 | |
759 | static bfd_boolean | |
58852c27 | 760 | iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
a75473eb SC |
761 | { |
762 | flagword old_flags, old_partial; | |
763 | flagword new_flags, new_partial; | |
764 | bfd_boolean error = FALSE; | |
765 | char new_opt[80]; | |
766 | char old_opt[80]; | |
767 | ||
768 | new_opt[0] = old_opt[0] = '\0'; | |
769 | new_flags = elf_elfheader (ibfd)->e_flags; | |
770 | old_flags = elf_elfheader (obfd)->e_flags; | |
771 | ||
a75473eb SC |
772 | if (!elf_flags_init (obfd)) |
773 | { | |
774 | /* First call, no flags set. */ | |
775 | elf_flags_init (obfd) = TRUE; | |
776 | elf_elfheader (obfd)->e_flags = new_flags; | |
777 | } | |
778 | ||
58852c27 | 779 | else if (new_flags != old_flags) |
a75473eb | 780 | { |
58852c27 NC |
781 | /* Warn if different cpu is used, but allow a |
782 | specific cpu to override the generic cpu. */ | |
a75473eb SC |
783 | new_partial = (new_flags & EF_IQ2000_CPU_MASK); |
784 | old_partial = (old_flags & EF_IQ2000_CPU_MASK); | |
a75473eb | 785 | |
58852c27 | 786 | if (new_partial != old_partial) |
a75473eb SC |
787 | { |
788 | switch (new_partial) | |
789 | { | |
58852c27 NC |
790 | case EF_IQ2000_CPU_IQ10: |
791 | strcat (new_opt, " -m10"); | |
792 | break; | |
793 | ||
794 | default: | |
795 | case EF_IQ2000_CPU_IQ2000: | |
796 | strcat (new_opt, " -m2000"); | |
797 | break; | |
a75473eb SC |
798 | } |
799 | ||
800 | switch (old_partial) | |
801 | { | |
58852c27 NC |
802 | case EF_IQ2000_CPU_IQ10: |
803 | strcat (old_opt, " -m10"); | |
804 | break; | |
805 | ||
806 | default: | |
807 | case EF_IQ2000_CPU_IQ2000: | |
808 | strcat (old_opt, " -m2000"); | |
809 | break; | |
a75473eb SC |
810 | } |
811 | } | |
812 | ||
813 | /* Print out any mismatches from above. */ | |
814 | if (new_opt[0]) | |
815 | { | |
816 | error = TRUE; | |
58852c27 | 817 | _bfd_error_handler |
a75473eb SC |
818 | (_("%s: compiled with %s and linked with modules compiled with %s"), |
819 | bfd_get_filename (ibfd), new_opt, old_opt); | |
820 | } | |
821 | ||
822 | new_flags &= ~ EF_IQ2000_ALL_FLAGS; | |
823 | old_flags &= ~ EF_IQ2000_ALL_FLAGS; | |
824 | ||
825 | /* Warn about any other mismatches. */ | |
826 | if (new_flags != old_flags) | |
827 | { | |
828 | error = TRUE; | |
58852c27 NC |
829 | |
830 | _bfd_error_handler | |
a75473eb SC |
831 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
832 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); | |
833 | } | |
834 | } | |
835 | ||
836 | if (error) | |
837 | bfd_set_error (bfd_error_bad_value); | |
838 | ||
839 | return !error; | |
840 | } | |
841 | ||
842 | \f | |
843 | static bfd_boolean | |
58852c27 | 844 | iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr) |
a75473eb SC |
845 | { |
846 | FILE *file = (FILE *) ptr; | |
847 | flagword flags; | |
848 | ||
849 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
850 | ||
851 | /* Print normal ELF private data. */ | |
852 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
853 | ||
854 | flags = elf_elfheader (abfd)->e_flags; | |
855 | fprintf (file, _("private flags = 0x%lx:"), (long)flags); | |
856 | ||
857 | switch (flags & EF_IQ2000_CPU_MASK) | |
858 | { | |
58852c27 NC |
859 | case EF_IQ2000_CPU_IQ10: |
860 | fprintf (file, " -m10"); | |
861 | break; | |
862 | case EF_IQ2000_CPU_IQ2000: | |
863 | fprintf (file, " -m2000"); | |
864 | break; | |
865 | default: | |
866 | break; | |
a75473eb SC |
867 | } |
868 | ||
869 | fputc ('\n', file); | |
60d8b524 | 870 | return TRUE; |
a75473eb SC |
871 | } |
872 | ||
873 | static | |
874 | bfd_boolean | |
58852c27 | 875 | iq2000_elf_object_p (bfd *abfd) |
a75473eb | 876 | { |
a75473eb SC |
877 | bfd_default_set_arch_mach (abfd, bfd_arch_iq2000, |
878 | elf32_iq2000_machine (abfd)); | |
879 | return TRUE; | |
880 | } | |
881 | ||
882 | \f | |
883 | #define ELF_ARCH bfd_arch_iq2000 | |
884 | #define ELF_MACHINE_CODE EM_IQ2000 | |
885 | #define ELF_MAXPAGESIZE 0x1000 | |
886 | ||
887 | #define TARGET_BIG_SYM bfd_elf32_iq2000_vec | |
888 | #define TARGET_BIG_NAME "elf32-iq2000" | |
889 | ||
890 | #define elf_info_to_howto_rel NULL | |
891 | #define elf_info_to_howto iq2000_info_to_howto_rela | |
892 | #define elf_backend_relocate_section iq2000_elf_relocate_section | |
893 | #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook | |
894 | #define elf_backend_gc_sweep_hook iq2000_elf_gc_sweep_hook | |
895 | #define elf_backend_check_relocs iq2000_elf_check_relocs | |
896 | #define elf_backend_object_p iq2000_elf_object_p | |
897 | #define elf_backend_rela_normal 1 | |
898 | ||
899 | #define elf_backend_can_gc_sections 1 | |
900 | ||
901 | #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup | |
902 | #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags | |
903 | #define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data | |
904 | #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data | |
905 | #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data | |
906 | ||
907 | #include "elf32-target.h" |