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2004-05-10 John Paul Wallington <jpw@gnu.org>
[binutils.git] / bfd / elf32-dlx.c
blob7fb6d0c19e24a5ff837cb34914a2e657efc69b92
1 /* DLX specific support for 32-bit ELF
2 Copyright 2002, 2003 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20 #include "bfd.h"
21 #include "sysdep.h"
22 #include "libbfd.h"
23 #include "elf-bfd.h"
24 #include "elf/dlx.h"
25
26 int set_dlx_skip_hi16_flag PARAMS ((int));
27
28 static bfd_boolean elf32_dlx_check_relocs
29 PARAMS ((bfd *, struct bfd_link_info *, asection *,
30 const Elf_Internal_Rela *));
31 static void elf32_dlx_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static void elf32_dlx_info_to_howto_rel
34 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
35 static bfd_reloc_status_type elf32_dlx_relocate16
36 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
37 static bfd_reloc_status_type elf32_dlx_relocate26
38 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
39 static reloc_howto_type *elf32_dlx_reloc_type_lookup
40 PARAMS ((bfd *, bfd_reloc_code_real_type));
41 static bfd_reloc_status_type _bfd_dlx_elf_hi16_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static reloc_howto_type * dlx_rtype_to_howto
44 PARAMS ((unsigned int));
45
46
47 #define USE_REL 1
48
49 #define bfd_elf32_bfd_reloc_type_lookup elf32_dlx_reloc_type_lookup
50 #define elf_info_to_howto elf32_dlx_info_to_howto
51 #define elf_info_to_howto_rel elf32_dlx_info_to_howto_rel
52 #define elf_backend_check_relocs elf32_dlx_check_relocs
53
54 static reloc_howto_type dlx_elf_howto_table[]=
55 {
56 /* No relocation. */
57 HOWTO (R_DLX_NONE, /* type */
58 0, /* rightshift */
59 0, /* size (0 = byte, 1 = short, 2 = long) */
60 0, /* bitsize */
61 FALSE, /* pc_relative */
62 0, /* bitpos */
63 complain_overflow_dont,/* complain_on_overflow */
64 bfd_elf_generic_reloc, /* special_function */
65 "R_DLX_NONE", /* name */
66 FALSE, /* partial_inplace */
67 0, /* src_mask */
68 0, /* dst_mask */
69 FALSE), /* pcrel_offset */
70
71 /* 8 bit relocation. */
72 HOWTO (R_DLX_RELOC_8, /* type */
73 0, /* rightshift */
74 0, /* size (0 = byte, 1 = short, 2 = long) */
75 8, /* bitsize */
76 FALSE, /* pc_relative */
77 0, /* bitpos */
78 complain_overflow_dont,/* complain_on_overflow */
79 bfd_elf_generic_reloc, /* special_function */
80 "R_DLX_RELOC_8", /* name */
81 TRUE, /* partial_inplace */
82 0xff, /* src_mask */
83 0xff, /* dst_mask */
84 FALSE), /* pcrel_offset */
85
86 /* 16 bit relocation. */
87 HOWTO (R_DLX_RELOC_16, /* type */
88 0, /* rightshift */
89 1, /* size (0 = byte, 1 = short, 2 = long) */
90 16, /* bitsize */
91 FALSE, /* pc_relative */
92 0, /* bitpos */
93 complain_overflow_dont,/* complain_on_overflow */
94 bfd_elf_generic_reloc, /* special_function */
95 "R_DLX_RELOC_16", /* name */
96 TRUE, /* partial_inplace */
97 0xffff, /* src_mask */
98 0xffff, /* dst_mask */
99 FALSE), /* pcrel_offset */
100
101 #if 0
102 /* 26 bit jump address. */
103 HOWTO (R_DLX_RELOC_26, /* type */
104 0, /* rightshift */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
106 26, /* bitsize */
107 FALSE, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_dont,/* complain_on_overflow */
110 /* This needs complex overflow detection, because the upper four
111 bits must match the PC + 4. */
112 bfd_elf_generic_reloc, /* special_function */
113 "R_DLX_RELOC_26", /* name */
114 TRUE, /* partial_inplace */
115 0x3ffffff, /* src_mask */
116 0x3ffffff, /* dst_mask */
117 FALSE), /* pcrel_offset */
118 #endif
119
120 /* 32 bit relocation. */
121 HOWTO (R_DLX_RELOC_32, /* type */
122 0, /* rightshift */
123 2, /* size (0 = byte, 1 = short, 2 = long) */
124 32, /* bitsize */
125 FALSE, /* pc_relative */
126 0, /* bitpos */
127 complain_overflow_dont,/* complain_on_overflow */
128 bfd_elf_generic_reloc, /* special_function */
129 "R_DLX_RELOC_32", /* name */
130 TRUE, /* partial_inplace */
131 0xffffffff, /* src_mask */
132 0xffffffff, /* dst_mask */
133 FALSE), /* pcrel_offset */
134
135 /* GNU extension to record C++ vtable hierarchy */
136 HOWTO (R_DLX_GNU_VTINHERIT, /* type */
137 0, /* rightshift */
138 2, /* size (0 = byte, 1 = short, 2 = long) */
139 0, /* bitsize */
140 FALSE, /* pc_relative */
141 0, /* bitpos */
142 complain_overflow_dont,/* complain_on_overflow */
143 NULL, /* special_function */
144 "R_DLX_GNU_VTINHERIT", /* name */
145 FALSE, /* partial_inplace */
146 0, /* src_mask */
147 0, /* dst_mask */
148 FALSE), /* pcrel_offset */
149
150 /* GNU extension to record C++ vtable member usage */
151 HOWTO (R_DLX_GNU_VTENTRY, /* type */
152 0, /* rightshift */
153 2, /* size (0 = byte, 1 = short, 2 = long) */
154 0, /* bitsize */
155 FALSE, /* pc_relative */
156 0, /* bitpos */
157 complain_overflow_dont,/* complain_on_overflow */
158 _bfd_elf_rel_vtable_reloc_fn,/* special_function */
159 "R_DLX_GNU_VTENTRY", /* name */
160 FALSE, /* partial_inplace */
161 0, /* src_mask */
162 0, /* dst_mask */
163 FALSE) /* pcrel_offset */
164 };
165
166 /* 16 bit offset for pc-relative branches. */
167 static reloc_howto_type elf_dlx_gnu_rel16_s2 =
168 HOWTO (R_DLX_RELOC_16_PCREL, /* type */
169 0, /* rightshift */
170 1, /* size (0 = byte, 1 = short, 2 = long) */
171 16, /* bitsize */
172 TRUE, /* pc_relative */
173 0, /* bitpos */
174 complain_overflow_signed, /* complain_on_overflow */
175 elf32_dlx_relocate16, /* special_function */
176 "R_DLX_RELOC_16_PCREL",/* name */
177 TRUE, /* partial_inplace */
178 0xffff, /* src_mask */
179 0xffff, /* dst_mask */
180 TRUE); /* pcrel_offset */
181
182 /* 26 bit offset for pc-relative branches. */
183 static reloc_howto_type elf_dlx_gnu_rel26_s2 =
184 HOWTO (R_DLX_RELOC_26_PCREL, /* type */
185 0, /* rightshift */
186 2, /* size (0 = byte, 1 = short, 2 = long) */
187 26, /* bitsize */
188 TRUE, /* pc_relative */
189 0, /* bitpos */
190 complain_overflow_dont,/* complain_on_overflow */
191 elf32_dlx_relocate26, /* special_function */
192 "R_DLX_RELOC_26_PCREL",/* name */
193 TRUE, /* partial_inplace */
194 0xffff, /* src_mask */
195 0xffff, /* dst_mask */
196 TRUE); /* pcrel_offset */
197
198 /* High 16 bits of symbol value. */
199 static reloc_howto_type elf_dlx_reloc_16_hi =
200 HOWTO (R_DLX_RELOC_16_HI, /* type */
201 16, /* rightshift */
202 2, /* size (0 = byte, 1 = short, 2 = long) */
203 32, /* bitsize */
204 FALSE, /* pc_relative */
205 0, /* bitpos */
206 complain_overflow_dont, /* complain_on_overflow */
207 _bfd_dlx_elf_hi16_reloc,/* special_function */
208 "R_DLX_RELOC_16_HI", /* name */
209 TRUE, /* partial_inplace */
210 0xFFFF, /* src_mask */
211 0xffff, /* dst_mask */
212 FALSE); /* pcrel_offset */
213
214 /* Low 16 bits of symbol value. */
215 static reloc_howto_type elf_dlx_reloc_16_lo =
216 HOWTO (R_DLX_RELOC_16_LO, /* type */
217 0, /* rightshift */
218 1, /* size (0 = byte, 1 = short, 2 = long) */
219 16, /* bitsize */
220 FALSE, /* pc_relative */
221 0, /* bitpos */
222 complain_overflow_dont,/* complain_on_overflow */
223 bfd_elf_generic_reloc, /* special_function */
224 "R_DLX_RELOC_16_LO", /* name */
225 TRUE, /* partial_inplace */
226 0xffff, /* src_mask */
227 0xffff, /* dst_mask */
228 FALSE); /* pcrel_offset */
229
230
231 /* The gas default behavior is not to preform the %hi modifier so that the
232 GNU assembler can have the lower 16 bits offset placed in the insn, BUT
233 we do like the gas to indicate it is %hi reloc type so when we in the link
234 loader phase we can have the corrected hi16 vale replace the buggous lo16
235 value that was placed there by gas. */
236
237 static int skip_dlx_elf_hi16_reloc = 0;
238
239 int
240 set_dlx_skip_hi16_flag (flag)
241 int flag;
242 {
243 skip_dlx_elf_hi16_reloc = flag;
244 return flag;
245 }
246
247 static bfd_reloc_status_type
248 _bfd_dlx_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
249 input_section, output_bfd, error_message)
250 bfd *abfd;
251 arelent *reloc_entry;
252 asymbol *symbol;
253 PTR data;
254 asection *input_section;
255 bfd *output_bfd;
256 char **error_message;
257 {
258 bfd_reloc_status_type ret;
259 bfd_vma relocation;
260
261 /* If the skip flag is set then we simply do the generic relocating, this
262 is more of a hack for dlx gas/gld, so we do not need to do the %hi/%lo
263 fixup like mips gld did. */
264 #if 0
265 printf ("DEBUG: skip_dlx_elf_hi16_reloc = 0x%08x\n", skip_dlx_elf_hi16_reloc);
266 #endif
267 if (skip_dlx_elf_hi16_reloc)
268 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
269 input_section, output_bfd, error_message);
270
271 /* If we're relocating, and this an external symbol, we don't want
272 to change anything. */
273 if (output_bfd != (bfd *) NULL
274 && (symbol->flags & BSF_SECTION_SYM) == 0
275 && reloc_entry->addend == 0)
276 {
277 reloc_entry->address += input_section->output_offset;
278 return bfd_reloc_ok;
279 }
280
281 ret = bfd_reloc_ok;
282
283 if (bfd_is_und_section (symbol->section)
284 && output_bfd == (bfd *) NULL)
285 ret = bfd_reloc_undefined;
286
287 #if 0
288 {
289 unsigned long vallo, val;
290
291 vallo = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address);
292 printf ("DEBUG: The relocation address = 0x%08x\n", reloc_entry->address);
293 printf ("DEBUG: The symbol = 0x%08x\n", vallo);
294 printf ("DEBUG: The symbol name = %s\n", bfd_asymbol_name (symbol));
295 printf ("DEBUG: The symbol->value = 0x%08x\n", symbol->value);
296 printf ("DEBUG: The vma = 0x%08x\n", symbol->section->output_section->vma);
297 printf ("DEBUG: The output_offset = 0x%08x\n", symbol->section->output_offset);
298 printf ("DEBUG: The input_offset = 0x%08x\n", input_section->output_offset);
299 printf ("DEBUG: The input_vma = 0x%08x\n", input_section->vma);
300 printf ("DEBUG: The addend = 0x%08x\n", reloc_entry->addend);
301 }
302 #endif
303
304 relocation = (bfd_is_com_section (symbol->section)) ? 0 : symbol->value;
305 relocation += symbol->section->output_section->vma;
306 relocation += symbol->section->output_offset;
307 relocation += reloc_entry->addend;
308 relocation += bfd_get_16 (abfd, (bfd_byte *)data + reloc_entry->address);
309
310 if (reloc_entry->address > input_section->_cooked_size)
311 return bfd_reloc_outofrange;
312
313 #if 0
314 printf ("DEBUG: The finial relocation value = 0x%08x\n", relocation);
315 #endif
316
317 bfd_put_16 (abfd, (short)((relocation >> 16) & 0xFFFF),
318 (bfd_byte *)data + reloc_entry->address);
319
320 return ret;
321 }
322
323 /* ELF relocs are against symbols. If we are producing relocatable
324 output, and the reloc is against an external symbol, and nothing
325 has given us any additional addend, the resulting reloc will also
326 be against the same symbol. In such a case, we don't want to
327 change anything about the way the reloc is handled, since it will
328 all be done at final link time. Rather than put special case code
329 into bfd_perform_relocation, all the reloc types use this howto
330 function. It just short circuits the reloc if producing
331 relocatable output against an external symbol. */
332
333 static bfd_reloc_status_type
334 elf32_dlx_relocate16 (abfd, reloc_entry, symbol, data,
335 input_section, output_bfd, error_message)
336 bfd *abfd;
337 arelent *reloc_entry;
338 asymbol *symbol;
339 PTR data;
340 asection *input_section;
341 bfd *output_bfd;
342 char **error_message ATTRIBUTE_UNUSED;
343 {
344 unsigned long insn, vallo, allignment;
345 int val;
346
347 /* HACK: I think this first condition is necessary when producing
348 relocatable output. After the end of HACK, the code is identical
349 to bfd_elf_generic_reloc(). I would _guess_ the first change
350 belongs there rather than here. martindo 1998-10-23. */
351
352 if (skip_dlx_elf_hi16_reloc)
353 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
354 input_section, output_bfd, error_message);
355
356 /* Check undefined section and undefined symbols */
357 if (bfd_is_und_section (symbol->section)
358 && output_bfd == (bfd *) NULL)
359 return bfd_reloc_undefined;
360
361 /* Can not support a long jump to sections other then .text */
362 if (strcmp (input_section->name, symbol->section->output_section->name) != 0)
363 {
364 fprintf (stderr,
365 "BFD Link Error: branch (PC rel16) to section (%s) not supported\n",
366 symbol->section->output_section->name);
367 return bfd_reloc_undefined;
368 }
369
370 insn = bfd_get_32 (abfd, (bfd_byte *)data + reloc_entry->address);
371 allignment = 1 << (input_section->output_section->alignment_power - 1);
372 vallo = insn & 0x0000FFFF;
373
374 if (vallo & 0x8000)
375 vallo = ~(vallo | 0xFFFF0000) + 1;
376
377 /* vallo points to the vma of next instruction. */
378 vallo += (((unsigned long)(input_section->output_section->vma +
379 input_section->output_offset) +
380 allignment) & ~allignment);
381
382 /* val is the displacement (PC relative to next instruction). */
383 val = (symbol->section->output_offset +
384 symbol->section->output_section->vma +
385 symbol->value) - vallo;
386 #if 0
387 printf ("DEBUG elf32_dlx_relocate: We are here\n");
388 printf ("DEBUG: The insn = 0x%08x\n", insn);
389 printf ("DEBUG: The vallo = 0x%08x\n", vallo);
390 printf ("DEBUG: The val = 0x%08x\n", val);
391 printf ("DEBUG: The symbol name = %s\n", bfd_asymbol_name (symbol));
392 printf ("DEBUG: The symbol->value = 0x%08x\n", symbol->value);
393 printf ("DEBUG: The vma = 0x%08x\n", symbol->section->output_section->vma);
394 printf ("DEBUG: The lma = 0x%08x\n", symbol->section->output_section->lma);
395 printf ("DEBUG: The alignment_power = 0x%08x\n", symbol->section->output_section->alignment_power);
396 printf ("DEBUG: The output_offset = 0x%08x\n", symbol->section->output_offset);
397 printf ("DEBUG: The addend = 0x%08x\n", reloc_entry->addend);
398 #endif
399
400 if (abs ((int) val) > 0x00007FFF)
401 return bfd_reloc_outofrange;
402
403 insn = (insn & 0xFFFF0000) | (val & 0x0000FFFF);
404
405 bfd_put_32 (abfd, insn,
406 (bfd_byte *) data + reloc_entry->address);
407
408 return bfd_reloc_ok;
409 }
410
411 static bfd_reloc_status_type
412 elf32_dlx_relocate26 (abfd, reloc_entry, symbol, data,
413 input_section, output_bfd, error_message)
414 bfd *abfd;
415 arelent *reloc_entry;
416 asymbol *symbol;
417 PTR data;
418 asection *input_section;
419 bfd *output_bfd;
420 char **error_message ATTRIBUTE_UNUSED;
421 {
422 unsigned long insn, vallo, allignment;
423 int val;
424
425 /* HACK: I think this first condition is necessary when producing
426 relocatable output. After the end of HACK, the code is identical
427 to bfd_elf_generic_reloc(). I would _guess_ the first change
428 belongs there rather than here. martindo 1998-10-23. */
429
430 if (skip_dlx_elf_hi16_reloc)
431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
432 input_section, output_bfd, error_message);
433
434 /* Check undefined section and undefined symbols. */
435 if (bfd_is_und_section (symbol->section)
436 && output_bfd == (bfd *) NULL)
437 return bfd_reloc_undefined;
438
439 /* Can not support a long jump to sections other then .text */
440 if (strcmp (input_section->name, symbol->section->output_section->name) != 0)
441 {
442 fprintf (stderr,
443 "BFD Link Error: jump (PC rel26) to section (%s) not supported\n",
444 symbol->section->output_section->name);
445 return bfd_reloc_undefined;
446 }
447
448 insn = bfd_get_32 (abfd, (bfd_byte *)data + reloc_entry->address);
449 allignment = 1 << (input_section->output_section->alignment_power - 1);
450 vallo = insn & 0x03FFFFFF;
451
452 if (vallo & 0x03000000)
453 vallo = ~(vallo | 0xFC000000) + 1;
454
455 /* vallo is the vma for the next instruction. */
456 vallo += (((unsigned long) (input_section->output_section->vma +
457 input_section->output_offset) +
458 allignment) & ~allignment);
459
460 /* val is the displacement (PC relative to next instruction). */
461 val = (symbol->section->output_offset +
462 symbol->section->output_section->vma + symbol->value)
463 - vallo;
464 #if 0
465 printf ("DEBUG elf32_dlx_relocate26: We are here\n");
466 printf ("DEBUG: The insn = 0x%08x\n", insn);
467 printf ("DEBUG: The vallo = 0x%08x\n", vallo);
468 printf ("DEBUG: The val = 0x%08x\n", val);
469 printf ("DEBUG: The abs(val) = 0x%08x\n", abs (val));
470 printf ("DEBUG: The symbol name = %s\n", bfd_asymbol_name (symbol));
471 printf ("DEBUG: The symbol->value = 0x%08x\n", symbol->value);
472 printf ("DEBUG: The vma = 0x%08x\n", symbol->section->output_section->vma);
473 printf ("DEBUG: The output_offset = 0x%08x\n", symbol->section->output_offset);
474 printf ("DEBUG: The input_vma = 0x%08x\n", input_section->output_section->vma);
475 printf ("DEBUG: The input_offset = 0x%08x\n", input_section->output_offset);
476 printf ("DEBUG: The input_name = %s\n", input_section->name);
477 printf ("DEBUG: The addend = 0x%08x\n", reloc_entry->addend);
478 #endif
479
480 if (abs ((int) val) > 0x01FFFFFF)
481 return bfd_reloc_outofrange;
482
483 insn = (insn & 0xFC000000) | (val & 0x03FFFFFF);
484 bfd_put_32 (abfd, insn,
485 (bfd_byte *) data + reloc_entry->address);
486
487 return bfd_reloc_ok;
488 }
489
490 /* A mapping from BFD reloc types to DLX ELF reloc types.
491 Stolen from elf32-mips.c.
492
493 More about this table - for dlx elf relocation we do not really
494 need this table, if we have a rtype defined in this table will
495 caused tc_gen_relocate confused and die on us, but if we remove
496 this table it will caused more problem, so for now simple solution
497 is to remove those entries which may cause problem. */
498 struct elf_reloc_map
499 {
500 bfd_reloc_code_real_type bfd_reloc_val;
501 enum elf_dlx_reloc_type elf_reloc_val;
502 };
503
504 static const struct elf_reloc_map dlx_reloc_map[] =
505 {
506 { BFD_RELOC_NONE, R_DLX_NONE },
507 { BFD_RELOC_16, R_DLX_RELOC_16 },
508 #if 0
509 { BFD_RELOC_DLX_JMP26, R_DLX_RELOC_26_PCREL },
510 #endif
511 { BFD_RELOC_32, R_DLX_RELOC_32 },
512 { BFD_RELOC_DLX_HI16_S, R_DLX_RELOC_16_HI },
513 { BFD_RELOC_DLX_LO16, R_DLX_RELOC_16_LO },
514 { BFD_RELOC_VTABLE_INHERIT, R_DLX_GNU_VTINHERIT },
515 { BFD_RELOC_VTABLE_ENTRY, R_DLX_GNU_VTENTRY }
516 };
517
518
519 /* Look through the relocs for a section during the first phase.
520 Since we don't do .gots or .plts, we just need to consider the
521 virtual table relocs for gc. */
522
523 static bfd_boolean
524 elf32_dlx_check_relocs (abfd, info, sec, relocs)
525 bfd *abfd;
526 struct bfd_link_info *info;
527 asection *sec;
528 const Elf_Internal_Rela *relocs;
529 {
530 Elf_Internal_Shdr *symtab_hdr;
531 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
532 const Elf_Internal_Rela *rel;
533 const Elf_Internal_Rela *rel_end;
534
535 if (info->relocatable)
536 return TRUE;
537
538 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
539 sym_hashes = elf_sym_hashes (abfd);
540 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
541 if (!elf_bad_symtab (abfd))
542 sym_hashes_end -= symtab_hdr->sh_info;
543
544 rel_end = relocs + sec->reloc_count;
545 for (rel = relocs; rel < rel_end; rel++)
546 {
547 struct elf_link_hash_entry *h;
548 unsigned long r_symndx;
549
550 r_symndx = ELF32_R_SYM (rel->r_info);
551 if (r_symndx < symtab_hdr->sh_info)
552 h = NULL;
553 else
554 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
555
556 switch (ELF32_R_TYPE (rel->r_info))
557 {
558 /* This relocation describes the C++ object vtable hierarchy.
559 Reconstruct it for later use during GC. */
560 case R_DLX_GNU_VTINHERIT:
561 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
562 return FALSE;
563 break;
564
565 /* This relocation describes which C++ vtable entries are actually
566 used. Record for later use during GC. */
567 case R_DLX_GNU_VTENTRY:
568 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
569 return FALSE;
570 break;
571 }
572 }
573
574 return TRUE;
575 }
576
577 /* Given a BFD reloc type, return a howto structure. */
578
579 static reloc_howto_type *
580 elf32_dlx_reloc_type_lookup (abfd, code)
581 bfd *abfd ATTRIBUTE_UNUSED;
582 bfd_reloc_code_real_type code;
583 {
584 unsigned int i;
585
586 for (i = 0; i < sizeof (dlx_reloc_map) / sizeof (struct elf_reloc_map); i++)
587 if (dlx_reloc_map[i].bfd_reloc_val == code)
588 return &dlx_elf_howto_table[(int) dlx_reloc_map[i].elf_reloc_val];
589
590 switch (code)
591 {
592 default:
593 bfd_set_error (bfd_error_bad_value);
594 return NULL;
595 case BFD_RELOC_16_PCREL_S2:
596 return &elf_dlx_gnu_rel16_s2;
597 case BFD_RELOC_DLX_JMP26:
598 return &elf_dlx_gnu_rel26_s2;
599 case BFD_RELOC_HI16_S:
600 return &elf_dlx_reloc_16_hi;
601 case BFD_RELOC_LO16:
602 return &elf_dlx_reloc_16_lo;
603 }
604 }
605
606 static reloc_howto_type *
607 dlx_rtype_to_howto (r_type)
608 unsigned int r_type;
609 {
610 switch (r_type)
611 {
612 case R_DLX_RELOC_16_PCREL:
613 return & elf_dlx_gnu_rel16_s2;
614 break;
615 case R_DLX_RELOC_26_PCREL:
616 return & elf_dlx_gnu_rel26_s2;
617 break;
618 case R_DLX_RELOC_16_HI:
619 return & elf_dlx_reloc_16_hi;
620 break;
621 case R_DLX_RELOC_16_LO:
622 return & elf_dlx_reloc_16_lo;
623 break;
624
625 default:
626 BFD_ASSERT (r_type < (unsigned int) R_DLX_max);
627 return & dlx_elf_howto_table[r_type];
628 break;
629 }
630 }
631
632 static void
633 elf32_dlx_info_to_howto (abfd, cache_ptr, dst)
634 bfd * abfd ATTRIBUTE_UNUSED;
635 arelent * cache_ptr ATTRIBUTE_UNUSED;
636 Elf_Internal_Rela * dst ATTRIBUTE_UNUSED;
637 {
638 abort ();
639 }
640
641 static void
642 elf32_dlx_info_to_howto_rel (abfd, cache_ptr, dst)
643 bfd *abfd ATTRIBUTE_UNUSED;
644 arelent *cache_ptr;
645 Elf_Internal_Rela *dst;
646 {
647 unsigned int r_type;
648
649 r_type = ELF32_R_TYPE (dst->r_info);
650 cache_ptr->howto = dlx_rtype_to_howto (r_type);
651 return;
652 }
653
654 #define TARGET_BIG_SYM bfd_elf32_dlx_big_vec
655 #define TARGET_BIG_NAME "elf32-dlx"
656 #define ELF_ARCH bfd_arch_dlx
657 #define ELF_MACHINE_CODE EM_DLX
658 #define ELF_MAXPAGESIZE 1 /* FIXME: This number is wrong, It should be the page size in bytes. */
659
660 #include "elf32-target.h"
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