Commit | Line | Data |
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a75473eb | 1 | /* IQ2000-specific support for 32-bit ELF. |
219d1afa | 2 | Copyright (C) 2003-2018 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 | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
58852c27 | 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 | 19 | |
a75473eb | 20 | #include "sysdep.h" |
3db64b00 | 21 | #include "bfd.h" |
a75473eb SC |
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 */ | |
6346d5ca AM |
37 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
38 | 0, /* bitsize */ | |
a75473eb SC |
39 | FALSE, /* pc_relative */ |
40 | 0, /* bitpos */ | |
6346d5ca | 41 | complain_overflow_dont, /* complain_on_overflow */ |
a75473eb SC |
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); | |
68ffbac6 | 292 | |
a75473eb | 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 | ||
68ffbac6 | 301 | value >>= 16; |
a75473eb SC |
302 | insn = ((insn & ~0xFFFF) | value); |
303 | ||
304 | bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); | |
305 | return bfd_reloc_ok; | |
306 | } | |
307 | ||
f15557e4 DD |
308 | static bfd_reloc_status_type |
309 | iq2000_elf_relocate_offset16 (bfd *input_bfd, | |
310 | Elf_Internal_Rela *rel, | |
311 | bfd_byte *contents, | |
312 | bfd_vma value, | |
313 | bfd_vma location) | |
314 | { | |
315 | bfd_vma insn; | |
316 | bfd_vma jtarget; | |
317 | ||
318 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
319 | ||
320 | value += rel->r_addend; | |
321 | ||
322 | if (value & 3) | |
323 | return bfd_reloc_dangerous; | |
324 | ||
325 | jtarget = (value & 0x3fffc) | (location & 0xf0000000L); | |
326 | ||
327 | if (jtarget != value) | |
328 | return bfd_reloc_overflow; | |
329 | ||
330 | insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF); | |
331 | ||
332 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); | |
333 | return bfd_reloc_ok; | |
334 | } | |
335 | ||
6c408f53 NC |
336 | /* Map BFD reloc types to IQ2000 ELF reloc types. */ |
337 | ||
a75473eb | 338 | static reloc_howto_type * |
de52dba4 AM |
339 | iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
340 | bfd_reloc_code_real_type code) | |
a75473eb SC |
341 | { |
342 | /* Note that the iq2000_elf_howto_table is indxed by the R_ | |
343 | constants. Thus, the order that the howto records appear in the | |
344 | table *must* match the order of the relocation types defined in | |
345 | include/elf/iq2000.h. */ | |
346 | ||
347 | switch (code) | |
348 | { | |
349 | case BFD_RELOC_NONE: | |
350 | return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE]; | |
351 | case BFD_RELOC_16: | |
352 | return &iq2000_elf_howto_table[ (int) R_IQ2000_16]; | |
353 | case BFD_RELOC_32: | |
354 | return &iq2000_elf_howto_table[ (int) R_IQ2000_32]; | |
355 | case BFD_RELOC_MIPS_JMP: | |
356 | return &iq2000_elf_howto_table[ (int) R_IQ2000_26]; | |
357 | case BFD_RELOC_IQ2000_OFFSET_16: | |
358 | return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16]; | |
359 | case BFD_RELOC_IQ2000_OFFSET_21: | |
360 | return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21]; | |
361 | case BFD_RELOC_16_PCREL_S2: | |
362 | return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16]; | |
363 | case BFD_RELOC_HI16: | |
364 | return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16]; | |
365 | case BFD_RELOC_IQ2000_UHI16: | |
366 | return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16]; | |
367 | case BFD_RELOC_LO16: | |
368 | return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16]; | |
369 | case BFD_RELOC_VTABLE_INHERIT: | |
370 | return &iq2000_elf_vtinherit_howto; | |
371 | case BFD_RELOC_VTABLE_ENTRY: | |
372 | return &iq2000_elf_vtentry_howto; | |
373 | default: | |
374 | /* Pacify gcc -Wall. */ | |
375 | return NULL; | |
376 | } | |
377 | return NULL; | |
378 | } | |
379 | ||
157090f7 AM |
380 | static reloc_howto_type * |
381 | iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
382 | { | |
383 | unsigned int i; | |
384 | ||
385 | for (i = 0; | |
386 | i < (sizeof (iq2000_elf_howto_table) | |
387 | / sizeof (iq2000_elf_howto_table[0])); | |
388 | i++) | |
389 | if (iq2000_elf_howto_table[i].name != NULL | |
390 | && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0) | |
391 | return &iq2000_elf_howto_table[i]; | |
392 | ||
393 | if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0) | |
394 | return &iq2000_elf_vtinherit_howto; | |
395 | if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0) | |
396 | return &iq2000_elf_vtentry_howto; | |
397 | ||
398 | return NULL; | |
399 | } | |
a75473eb SC |
400 | \f |
401 | /* Perform a single relocation. By default we use the standard BFD | |
402 | routines. */ | |
403 | ||
404 | static bfd_reloc_status_type | |
58852c27 NC |
405 | iq2000_final_link_relocate (reloc_howto_type * howto, |
406 | bfd * input_bfd, | |
407 | asection * input_section, | |
408 | bfd_byte * contents, | |
409 | Elf_Internal_Rela * rel, | |
410 | bfd_vma relocation) | |
a75473eb SC |
411 | { |
412 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
413 | contents, rel->r_offset, | |
414 | relocation, rel->r_addend); | |
415 | } | |
416 | \f | |
417 | /* Set the howto pointer for a IQ2000 ELF reloc. */ | |
418 | ||
419 | static void | |
58852c27 NC |
420 | iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, |
421 | arelent * cache_ptr, | |
422 | Elf_Internal_Rela * dst) | |
a75473eb SC |
423 | { |
424 | unsigned int r_type; | |
425 | ||
426 | r_type = ELF32_R_TYPE (dst->r_info); | |
427 | switch (r_type) | |
428 | { | |
429 | case R_IQ2000_GNU_VTINHERIT: | |
430 | cache_ptr->howto = & iq2000_elf_vtinherit_howto; | |
431 | break; | |
432 | ||
433 | case R_IQ2000_GNU_VTENTRY: | |
434 | cache_ptr->howto = & iq2000_elf_vtentry_howto; | |
435 | break; | |
436 | ||
437 | default: | |
5860e3f8 NC |
438 | if (r_type >= (unsigned int) R_IQ2000_max) |
439 | { | |
695344c0 | 440 | /* xgettext:c-format */ |
64d29018 | 441 | _bfd_error_handler (_("%B: invalid IQ2000 reloc number: %d"), abfd, r_type); |
5860e3f8 NC |
442 | r_type = 0; |
443 | } | |
a75473eb SC |
444 | cache_ptr->howto = & iq2000_elf_howto_table [r_type]; |
445 | break; | |
446 | } | |
447 | } | |
448 | ||
449 | /* Look through the relocs for a section during the first phase. | |
450 | Since we don't do .gots or .plts, we just need to consider the | |
451 | virtual table relocs for gc. */ | |
68ffbac6 | 452 | |
a75473eb | 453 | static bfd_boolean |
58852c27 NC |
454 | iq2000_elf_check_relocs (bfd *abfd, |
455 | struct bfd_link_info *info, | |
456 | asection *sec, | |
457 | const Elf_Internal_Rela *relocs) | |
a75473eb SC |
458 | { |
459 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 460 | struct elf_link_hash_entry **sym_hashes; |
60d8b524 AM |
461 | const Elf_Internal_Rela *rel; |
462 | const Elf_Internal_Rela *rel_end; | |
463 | bfd_boolean changed = FALSE; | |
68ffbac6 | 464 | |
0e1862bb | 465 | if (bfd_link_relocatable (info)) |
a75473eb | 466 | return TRUE; |
68ffbac6 | 467 | |
a75473eb SC |
468 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
469 | sym_hashes = elf_sym_hashes (abfd); | |
68ffbac6 | 470 | |
a75473eb SC |
471 | rel_end = relocs + sec->reloc_count; |
472 | for (rel = relocs; rel < rel_end; rel++) | |
473 | { | |
474 | struct elf_link_hash_entry *h; | |
475 | unsigned long r_symndx; | |
68ffbac6 | 476 | |
a75473eb SC |
477 | r_symndx = ELF32_R_SYM (rel->r_info); |
478 | if (r_symndx < symtab_hdr->sh_info) | |
479 | h = NULL; | |
480 | else | |
973a3492 L |
481 | { |
482 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
483 | while (h->root.type == bfd_link_hash_indirect | |
484 | || h->root.type == bfd_link_hash_warning) | |
485 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
486 | } | |
68ffbac6 | 487 | |
a75473eb SC |
488 | switch (ELF32_R_TYPE (rel->r_info)) |
489 | { | |
58852c27 NC |
490 | /* This relocation describes the C++ object vtable |
491 | hierarchy. Reconstruct it for later use during GC. */ | |
a75473eb | 492 | case R_IQ2000_GNU_VTINHERIT: |
c152c796 | 493 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
a75473eb SC |
494 | return FALSE; |
495 | break; | |
68ffbac6 | 496 | |
58852c27 NC |
497 | /* This relocation describes which C++ vtable entries |
498 | are actually used. Record for later use during GC. */ | |
a75473eb | 499 | case R_IQ2000_GNU_VTENTRY: |
d17e0c6e JB |
500 | BFD_ASSERT (h != NULL); |
501 | if (h != NULL | |
502 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
a75473eb SC |
503 | return FALSE; |
504 | break; | |
505 | ||
506 | case R_IQ2000_32: | |
58852c27 | 507 | /* For debug section, change to special harvard-aware relocations. */ |
0112cd26 NC |
508 | if (CONST_STRNEQ (sec->name, ".debug") |
509 | || CONST_STRNEQ (sec->name, ".stab") | |
510 | || CONST_STRNEQ (sec->name, ".eh_frame")) | |
60d8b524 AM |
511 | { |
512 | ((Elf_Internal_Rela *) rel)->r_info | |
513 | = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); | |
514 | changed = TRUE; | |
515 | } | |
a75473eb SC |
516 | break; |
517 | } | |
518 | } | |
60d8b524 AM |
519 | |
520 | if (changed) | |
521 | /* Note that we've changed relocs, otherwise if !info->keep_memory | |
522 | we'll free the relocs and lose our changes. */ | |
d5cb4bb8 | 523 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; |
60d8b524 | 524 | |
a75473eb SC |
525 | return TRUE; |
526 | } | |
527 | ||
528 | \f | |
529 | /* Relocate a IQ2000 ELF section. | |
530 | There is some attempt to make this function usable for many architectures, | |
531 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
532 | if only to serve as a learning tool. | |
533 | ||
534 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
535 | to handle the relocations for a section. | |
536 | ||
537 | The relocs are always passed as Rela structures; if the section | |
538 | actually uses Rel structures, the r_addend field will always be | |
539 | zero. | |
540 | ||
541 | This function is responsible for adjusting the section contents as | |
1049f94e | 542 | necessary, and (if using Rela relocs and generating a relocatable |
a75473eb SC |
543 | output file) adjusting the reloc addend as necessary. |
544 | ||
545 | This function does not have to worry about setting the reloc | |
546 | address or the reloc symbol index. | |
547 | ||
548 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
549 | ||
550 | LOCAL_SECTIONS is an array giving the section in the input file | |
551 | corresponding to the st_shndx field of each local symbol. | |
552 | ||
553 | The global hash table entry for the global symbols can be found | |
554 | via elf_sym_hashes (input_bfd). | |
555 | ||
1049f94e | 556 | When generating relocatable output, this function must handle |
a75473eb SC |
557 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
558 | going to be the section symbol corresponding to the output | |
559 | section, which means that the addend must be adjusted | |
560 | accordingly. */ | |
561 | ||
562 | static bfd_boolean | |
58852c27 NC |
563 | iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, |
564 | struct bfd_link_info * info, | |
565 | bfd * input_bfd, | |
566 | asection * input_section, | |
567 | bfd_byte * contents, | |
568 | Elf_Internal_Rela * relocs, | |
569 | Elf_Internal_Sym * local_syms, | |
570 | asection ** local_sections) | |
a75473eb SC |
571 | { |
572 | Elf_Internal_Shdr * symtab_hdr; | |
573 | struct elf_link_hash_entry ** sym_hashes; | |
574 | Elf_Internal_Rela * rel; | |
575 | Elf_Internal_Rela * relend; | |
576 | ||
577 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
578 | sym_hashes = elf_sym_hashes (input_bfd); | |
579 | relend = relocs + input_section->reloc_count; | |
580 | ||
581 | for (rel = relocs; rel < relend; rel ++) | |
582 | { | |
583 | reloc_howto_type * howto; | |
584 | unsigned long r_symndx; | |
585 | Elf_Internal_Sym * sym; | |
586 | asection * sec; | |
587 | struct elf_link_hash_entry * h; | |
588 | bfd_vma relocation; | |
589 | bfd_reloc_status_type r; | |
590 | const char * name = NULL; | |
591 | int r_type; | |
68ffbac6 | 592 | |
a75473eb | 593 | r_type = ELF32_R_TYPE (rel->r_info); |
68ffbac6 | 594 | |
a75473eb SC |
595 | if ( r_type == R_IQ2000_GNU_VTINHERIT |
596 | || r_type == R_IQ2000_GNU_VTENTRY) | |
597 | continue; | |
68ffbac6 | 598 | |
a75473eb SC |
599 | r_symndx = ELF32_R_SYM (rel->r_info); |
600 | ||
a75473eb SC |
601 | howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
602 | h = NULL; | |
603 | sym = NULL; | |
604 | sec = NULL; | |
68ffbac6 | 605 | |
a75473eb SC |
606 | if (r_symndx < symtab_hdr->sh_info) |
607 | { | |
f15557e4 DD |
608 | asection *osec; |
609 | ||
a75473eb | 610 | sym = local_syms + r_symndx; |
f15557e4 DD |
611 | osec = sec = local_sections [r_symndx]; |
612 | if ((sec->flags & SEC_MERGE) | |
613 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
614 | /* This relocation is relative to a section symbol that is | |
615 | going to be merged. Change it so that it is relative | |
616 | to the merged section symbol. */ | |
617 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec, | |
618 | rel->r_addend); | |
619 | ||
a75473eb SC |
620 | relocation = (sec->output_section->vma |
621 | + sec->output_offset | |
622 | + sym->st_value); | |
68ffbac6 | 623 | |
a75473eb SC |
624 | name = bfd_elf_string_from_elf_section |
625 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
f15557e4 | 626 | name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name; |
a75473eb SC |
627 | } |
628 | else | |
629 | { | |
560e09e9 | 630 | bfd_boolean unresolved_reloc; |
62d887d4 | 631 | bfd_boolean warned, ignored; |
560e09e9 | 632 | |
b2a8e766 AM |
633 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
634 | r_symndx, symtab_hdr, sym_hashes, | |
635 | h, sec, relocation, | |
62d887d4 | 636 | unresolved_reloc, warned, ignored); |
a75473eb SC |
637 | |
638 | name = h->root.root.string; | |
a75473eb SC |
639 | } |
640 | ||
dbaa2011 | 641 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 642 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 643 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 644 | |
0e1862bb | 645 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
646 | continue; |
647 | ||
a75473eb SC |
648 | switch (r_type) |
649 | { | |
650 | case R_IQ2000_HI16: | |
651 | r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); | |
652 | break; | |
653 | ||
f15557e4 DD |
654 | case R_IQ2000_OFFSET_16: |
655 | r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation, | |
656 | input_section->output_section->vma | |
657 | + input_section->output_offset | |
658 | + rel->r_offset); | |
659 | break; | |
660 | ||
a75473eb SC |
661 | case R_IQ2000_PC16: |
662 | rel->r_addend -= 4; | |
663 | /* Fall through. */ | |
664 | ||
665 | default: | |
666 | r = iq2000_final_link_relocate (howto, input_bfd, input_section, | |
667 | contents, rel, relocation); | |
668 | break; | |
669 | } | |
670 | ||
671 | if (r != bfd_reloc_ok) | |
672 | { | |
673 | const char * msg = (const char *) NULL; | |
674 | ||
675 | switch (r) | |
676 | { | |
677 | case bfd_reloc_overflow: | |
1a72702b | 678 | (*info->callbacks->reloc_overflow) |
dfeffb9f L |
679 | (info, (h ? &h->root : NULL), name, howto->name, |
680 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
a75473eb | 681 | break; |
68ffbac6 | 682 | |
a75473eb | 683 | case bfd_reloc_undefined: |
1a72702b | 684 | (*info->callbacks->undefined_symbol) |
a75473eb SC |
685 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
686 | break; | |
68ffbac6 | 687 | |
a75473eb SC |
688 | case bfd_reloc_outofrange: |
689 | msg = _("internal error: out of range error"); | |
690 | break; | |
691 | ||
692 | case bfd_reloc_notsupported: | |
693 | msg = _("internal error: unsupported relocation error"); | |
694 | break; | |
695 | ||
696 | case bfd_reloc_dangerous: | |
697 | msg = _("internal error: dangerous relocation"); | |
698 | break; | |
699 | ||
700 | default: | |
701 | msg = _("internal error: unknown error"); | |
702 | break; | |
703 | } | |
704 | ||
705 | if (msg) | |
1a72702b AM |
706 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
707 | input_section, rel->r_offset); | |
a75473eb SC |
708 | } |
709 | } | |
710 | ||
711 | return TRUE; | |
712 | } | |
713 | \f | |
714 | ||
a75473eb SC |
715 | /* Return the section that should be marked against GC for a given |
716 | relocation. */ | |
717 | ||
718 | static asection * | |
07adf181 AM |
719 | iq2000_elf_gc_mark_hook (asection *sec, |
720 | struct bfd_link_info *info, | |
721 | Elf_Internal_Rela *rel, | |
722 | struct elf_link_hash_entry *h, | |
723 | Elf_Internal_Sym *sym) | |
a75473eb | 724 | { |
07adf181 AM |
725 | if (h != NULL) |
726 | switch (ELF32_R_TYPE (rel->r_info)) | |
727 | { | |
728 | case R_IQ2000_GNU_VTINHERIT: | |
729 | case R_IQ2000_GNU_VTENTRY: | |
730 | return NULL; | |
731 | } | |
732 | ||
733 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
a75473eb SC |
734 | } |
735 | ||
736 | \f | |
737 | /* Return the MACH for an e_flags value. */ | |
738 | ||
739 | static int | |
58852c27 | 740 | elf32_iq2000_machine (bfd *abfd) |
a75473eb SC |
741 | { |
742 | switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) | |
743 | { | |
58852c27 NC |
744 | case EF_IQ2000_CPU_IQ10: |
745 | return bfd_mach_iq10; | |
a75473eb | 746 | |
58852c27 NC |
747 | case EF_IQ2000_CPU_IQ2000: |
748 | default: | |
749 | return bfd_mach_iq2000; | |
750 | } | |
a75473eb SC |
751 | } |
752 | ||
753 | \f | |
754 | /* Function to set the ELF flag bits. */ | |
755 | ||
756 | static bfd_boolean | |
58852c27 | 757 | iq2000_elf_set_private_flags (bfd *abfd, flagword flags) |
a75473eb SC |
758 | { |
759 | elf_elfheader (abfd)->e_flags = flags; | |
760 | elf_flags_init (abfd) = TRUE; | |
761 | return TRUE; | |
762 | } | |
763 | ||
58852c27 NC |
764 | /* Merge backend specific data from an object |
765 | file to the output object file when linking. */ | |
a75473eb SC |
766 | |
767 | static bfd_boolean | |
50e03d47 | 768 | iq2000_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
a75473eb | 769 | { |
50e03d47 | 770 | bfd *obfd = info->output_bfd; |
a75473eb SC |
771 | flagword old_flags, old_partial; |
772 | flagword new_flags, new_partial; | |
773 | bfd_boolean error = FALSE; | |
774 | char new_opt[80]; | |
775 | char old_opt[80]; | |
776 | ||
777 | new_opt[0] = old_opt[0] = '\0'; | |
778 | new_flags = elf_elfheader (ibfd)->e_flags; | |
779 | old_flags = elf_elfheader (obfd)->e_flags; | |
780 | ||
a75473eb SC |
781 | if (!elf_flags_init (obfd)) |
782 | { | |
783 | /* First call, no flags set. */ | |
784 | elf_flags_init (obfd) = TRUE; | |
785 | elf_elfheader (obfd)->e_flags = new_flags; | |
786 | } | |
787 | ||
58852c27 | 788 | else if (new_flags != old_flags) |
a75473eb | 789 | { |
58852c27 NC |
790 | /* Warn if different cpu is used, but allow a |
791 | specific cpu to override the generic cpu. */ | |
a75473eb SC |
792 | new_partial = (new_flags & EF_IQ2000_CPU_MASK); |
793 | old_partial = (old_flags & EF_IQ2000_CPU_MASK); | |
a75473eb | 794 | |
58852c27 | 795 | if (new_partial != old_partial) |
a75473eb SC |
796 | { |
797 | switch (new_partial) | |
798 | { | |
58852c27 NC |
799 | case EF_IQ2000_CPU_IQ10: |
800 | strcat (new_opt, " -m10"); | |
801 | break; | |
802 | ||
803 | default: | |
804 | case EF_IQ2000_CPU_IQ2000: | |
805 | strcat (new_opt, " -m2000"); | |
806 | break; | |
a75473eb SC |
807 | } |
808 | ||
809 | switch (old_partial) | |
810 | { | |
58852c27 NC |
811 | case EF_IQ2000_CPU_IQ10: |
812 | strcat (old_opt, " -m10"); | |
813 | break; | |
814 | ||
815 | default: | |
816 | case EF_IQ2000_CPU_IQ2000: | |
817 | strcat (old_opt, " -m2000"); | |
818 | break; | |
a75473eb SC |
819 | } |
820 | } | |
68ffbac6 | 821 | |
a75473eb SC |
822 | /* Print out any mismatches from above. */ |
823 | if (new_opt[0]) | |
824 | { | |
825 | error = TRUE; | |
58852c27 | 826 | _bfd_error_handler |
695344c0 | 827 | /* xgettext:c-format */ |
dae82561 AM |
828 | (_("%B: compiled with %s and linked with modules compiled with %s"), |
829 | ibfd, new_opt, old_opt); | |
a75473eb SC |
830 | } |
831 | ||
832 | new_flags &= ~ EF_IQ2000_ALL_FLAGS; | |
833 | old_flags &= ~ EF_IQ2000_ALL_FLAGS; | |
834 | ||
835 | /* Warn about any other mismatches. */ | |
836 | if (new_flags != old_flags) | |
837 | { | |
838 | error = TRUE; | |
58852c27 NC |
839 | |
840 | _bfd_error_handler | |
695344c0 | 841 | /* xgettext:c-format */ |
d42c267e AM |
842 | (_("%B: uses different e_flags (%#x) fields than previous modules (%#x)"), |
843 | ibfd, new_flags, old_flags); | |
a75473eb SC |
844 | } |
845 | } | |
846 | ||
847 | if (error) | |
848 | bfd_set_error (bfd_error_bad_value); | |
849 | ||
850 | return !error; | |
851 | } | |
852 | ||
853 | \f | |
854 | static bfd_boolean | |
58852c27 | 855 | iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr) |
a75473eb SC |
856 | { |
857 | FILE *file = (FILE *) ptr; | |
858 | flagword flags; | |
859 | ||
860 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
861 | ||
862 | /* Print normal ELF private data. */ | |
863 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
864 | ||
865 | flags = elf_elfheader (abfd)->e_flags; | |
0af1713e | 866 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); |
a75473eb SC |
867 | |
868 | switch (flags & EF_IQ2000_CPU_MASK) | |
869 | { | |
58852c27 NC |
870 | case EF_IQ2000_CPU_IQ10: |
871 | fprintf (file, " -m10"); | |
872 | break; | |
873 | case EF_IQ2000_CPU_IQ2000: | |
874 | fprintf (file, " -m2000"); | |
875 | break; | |
876 | default: | |
877 | break; | |
a75473eb SC |
878 | } |
879 | ||
880 | fputc ('\n', file); | |
60d8b524 | 881 | return TRUE; |
a75473eb SC |
882 | } |
883 | ||
884 | static | |
885 | bfd_boolean | |
58852c27 | 886 | iq2000_elf_object_p (bfd *abfd) |
a75473eb | 887 | { |
a75473eb SC |
888 | bfd_default_set_arch_mach (abfd, bfd_arch_iq2000, |
889 | elf32_iq2000_machine (abfd)); | |
890 | return TRUE; | |
891 | } | |
892 | ||
893 | \f | |
894 | #define ELF_ARCH bfd_arch_iq2000 | |
895 | #define ELF_MACHINE_CODE EM_IQ2000 | |
896 | #define ELF_MAXPAGESIZE 0x1000 | |
897 | ||
6d00b590 | 898 | #define TARGET_BIG_SYM iq2000_elf32_vec |
a75473eb SC |
899 | #define TARGET_BIG_NAME "elf32-iq2000" |
900 | ||
901 | #define elf_info_to_howto_rel NULL | |
902 | #define elf_info_to_howto iq2000_info_to_howto_rela | |
903 | #define elf_backend_relocate_section iq2000_elf_relocate_section | |
904 | #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook | |
a75473eb SC |
905 | #define elf_backend_check_relocs iq2000_elf_check_relocs |
906 | #define elf_backend_object_p iq2000_elf_object_p | |
907 | #define elf_backend_rela_normal 1 | |
908 | ||
909 | #define elf_backend_can_gc_sections 1 | |
910 | ||
911 | #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup | |
157090f7 | 912 | #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup |
a75473eb | 913 | #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags |
a75473eb SC |
914 | #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data |
915 | #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data | |
916 | ||
917 | #include "elf32-target.h" |