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2004-10-21 H.J. Lu <hongjiu.lu@intel.com>
[deliverable/binutils-gdb.git] / bfd / elf32-v850.c
CommitLineData
252b5132 1/* V850-specific support for 32-bit ELF
b2a8e766 2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
7898deda 3 Free Software Foundation, Inc.
252b5132 4
86aba9db 5 This file is part of BFD, the Binary File Descriptor library.
252b5132 6
86aba9db
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
252b5132 11
86aba9db
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
252b5132 16
86aba9db
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
252b5132 20
252b5132 21/* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char
86aba9db 22 dependencies. As is the gas & simulator code for the v850. */
252b5132 23
252b5132
RH		 24#include "bfd.h"
25#include "sysdep.h"
26#include "bfdlink.h"
27#include "libbfd.h"
28#include "elf-bfd.h"
29#include "elf/v850.h"
e12dd2ea 30#include "libiberty.h"
252b5132 31
e12dd2ea 32/* Sign-extend a 24-bit number. */
dc810e39 33#define SEXT24(x) ((((x) & 0xffffff) ^ 0x800000) - 0x800000)
435b1e90 34
252b5132
RH		 35static reloc_howto_type *v850_elf_reloc_type_lookup
36 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
37static void v850_elf_info_to_howto_rel
947216bf 38 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
252b5132 39static void v850_elf_info_to_howto_rela
947216bf 40 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
252b5132
RH		 41static bfd_reloc_status_type v850_elf_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
b34976b6 43static bfd_boolean v850_elf_is_local_label_name
252b5132 44 PARAMS ((bfd *, const char *));
b34976b6 45static bfd_boolean v850_elf_relocate_section
252b5132
RH		 46 PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
47 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
48static bfd_reloc_status_type v850_elf_perform_relocation
dc810e39 49 PARAMS ((bfd *, unsigned int, bfd_vma, bfd_byte *));
b34976b6 50static bfd_boolean v850_elf_check_relocs
252b5132
RH		 51 PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
52static void remember_hi16s_reloc
53 PARAMS ((bfd *, bfd_vma, bfd_byte *));
54static bfd_byte * find_remembered_hi16s_reloc
b34976b6 55 PARAMS ((bfd_vma, bfd_boolean *));
252b5132
RH		 56static bfd_reloc_status_type v850_elf_final_link_relocate
57 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, bfd_vma,
58 bfd_vma, bfd_vma, struct bfd_link_info *, asection *, int));
b34976b6 59static bfd_boolean v850_elf_object_p
252b5132 60 PARAMS ((bfd *));
b34976b6 61static bfd_boolean v850_elf_fake_sections
947216bf 62 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
252b5132 63static void v850_elf_final_write_processing
b34976b6
AM		 64 PARAMS ((bfd *, bfd_boolean));
65static bfd_boolean v850_elf_set_private_flags
252b5132 66 PARAMS ((bfd *, flagword));
b34976b6 67static bfd_boolean v850_elf_merge_private_bfd_data
252b5132 68 PARAMS ((bfd *, bfd *));
b34976b6 69static bfd_boolean v850_elf_print_private_bfd_data
252b5132 70 PARAMS ((bfd *, PTR));
b34976b6 71static bfd_boolean v850_elf_section_from_bfd_section
af746e92 72 PARAMS ((bfd *, asection *, int *));
252b5132
RH		 73static void v850_elf_symbol_processing
74 PARAMS ((bfd *, asymbol *));
b34976b6 75static bfd_boolean v850_elf_add_symbol_hook
555cd476 76 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
252b5132 77 const char **, flagword *, asection **, bfd_vma *));
b34976b6 78static bfd_boolean v850_elf_link_output_symbol_hook
754021d0
AM		 79 PARAMS ((struct bfd_link_info *, const char *, Elf_Internal_Sym *,
80 asection *, struct elf_link_hash_entry *));
b34976b6 81static bfd_boolean v850_elf_section_from_shdr
90937f86 82 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
b34976b6 83static bfd_boolean v850_elf_gc_sweep_hook
e12dd2ea
NC		 84 PARAMS ((bfd *, struct bfd_link_info *, asection *,
85 const Elf_Internal_Rela *));
86static asection * v850_elf_gc_mark_hook
1e2f5b6e 87 PARAMS ((asection *, struct bfd_link_info *,
e12dd2ea
NC		 88 Elf_Internal_Rela *, struct elf_link_hash_entry *,
89 Elf_Internal_Sym *));
86aba9db
NC		 90static bfd_reloc_status_type v850_elf_ignore_reloc
91 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
b34976b6 92static bfd_boolean v850_elf_relax_delete_bytes
86aba9db 93 PARAMS ((bfd *, asection *, bfd_vma, bfd_vma, int));
b34976b6
AM		 94static bfd_boolean v850_elf_relax_section
95 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
e12dd2ea
NC		 96
97/* Note: It is REQUIRED that the 'type' value of each entry
98 in this array match the index of the entry in the array. */
252b5132
RH		 99static reloc_howto_type v850_elf_howto_table[] =
100{
101 /* This reloc does nothing. */
102 HOWTO (R_V850_NONE, /* type */
103 0, /* rightshift */
104 2, /* size (0 = byte, 1 = short, 2 = long) */
105 32, /* bitsize */
b34976b6 106 FALSE, /* pc_relative */
252b5132
RH		 107 0, /* bitpos */
108 complain_overflow_bitfield, /* complain_on_overflow */
109 bfd_elf_generic_reloc, /* special_function */
110 "R_V850_NONE", /* name */
b34976b6 111 FALSE, /* partial_inplace */
252b5132
RH		 112 0, /* src_mask */
113 0, /* dst_mask */
b34976b6 114 FALSE), /* pcrel_offset */
252b5132 115
435b1e90 116 /* A PC relative 9 bit branch. */
252b5132
RH		 117 HOWTO (R_V850_9_PCREL, /* type */
118 2, /* rightshift */
119 2, /* size (0 = byte, 1 = short, 2 = long) */
120 26, /* bitsize */
b34976b6 121 TRUE, /* pc_relative */
252b5132
RH		 122 0, /* bitpos */
123 complain_overflow_bitfield, /* complain_on_overflow */
124 v850_elf_reloc, /* special_function */
125 "R_V850_9_PCREL", /* name */
b34976b6 126 FALSE, /* partial_inplace */
252b5132
RH		 127 0x00ffffff, /* src_mask */
128 0x00ffffff, /* dst_mask */
b34976b6 129 TRUE), /* pcrel_offset */
252b5132 130
435b1e90 131 /* A PC relative 22 bit branch. */
252b5132
RH		 132 HOWTO (R_V850_22_PCREL, /* type */
133 2, /* rightshift */
134 2, /* size (0 = byte, 1 = short, 2 = long) */
135 22, /* bitsize */
b34976b6 136 TRUE, /* pc_relative */
252b5132
RH		 137 7, /* bitpos */
138 complain_overflow_signed, /* complain_on_overflow */
139 v850_elf_reloc, /* special_function */
140 "R_V850_22_PCREL", /* name */
b34976b6 141 FALSE, /* partial_inplace */
252b5132
RH		 142 0x07ffff80, /* src_mask */
143 0x07ffff80, /* dst_mask */
b34976b6 144 TRUE), /* pcrel_offset */
252b5132
RH		 145
146 /* High 16 bits of symbol value. */
147 HOWTO (R_V850_HI16_S, /* type */
148 0, /* rightshift */
149 1, /* size (0 = byte, 1 = short, 2 = long) */
150 16, /* bitsize */
b34976b6 151 FALSE, /* pc_relative */
252b5132
RH		 152 0, /* bitpos */
153 complain_overflow_dont, /* complain_on_overflow */
154 v850_elf_reloc, /* special_function */
155 "R_V850_HI16_S", /* name */
b34976b6 156 FALSE, /* partial_inplace */
252b5132
RH		 157 0xffff, /* src_mask */
158 0xffff, /* dst_mask */
b34976b6 159 FALSE), /* pcrel_offset */
252b5132
RH		 160
161 /* High 16 bits of symbol value. */
162 HOWTO (R_V850_HI16, /* type */
163 0, /* rightshift */
164 1, /* size (0 = byte, 1 = short, 2 = long) */
165 16, /* bitsize */
b34976b6 166 FALSE, /* pc_relative */
252b5132
RH		 167 0, /* bitpos */
168 complain_overflow_dont, /* complain_on_overflow */
169 v850_elf_reloc, /* special_function */
170 "R_V850_HI16", /* name */
b34976b6 171 FALSE, /* partial_inplace */
252b5132
RH		 172 0xffff, /* src_mask */
173 0xffff, /* dst_mask */
b34976b6 174 FALSE), /* pcrel_offset */
252b5132
RH		 175
176 /* Low 16 bits of symbol value. */
177 HOWTO (R_V850_LO16, /* type */
178 0, /* rightshift */
179 1, /* size (0 = byte, 1 = short, 2 = long) */
180 16, /* bitsize */
b34976b6 181 FALSE, /* pc_relative */
252b5132
RH		 182 0, /* bitpos */
183 complain_overflow_dont, /* complain_on_overflow */
184 v850_elf_reloc, /* special_function */
185 "R_V850_LO16", /* name */
b34976b6 186 FALSE, /* partial_inplace */
252b5132
RH		 187 0xffff, /* src_mask */
188 0xffff, /* dst_mask */
b34976b6 189 FALSE), /* pcrel_offset */
252b5132
RH		 190
191 /* Simple 32bit reloc. */
e30ddb24 192 HOWTO (R_V850_ABS32, /* type */
252b5132
RH		 193 0, /* rightshift */
194 2, /* size (0 = byte, 1 = short, 2 = long) */
195 32, /* bitsize */
b34976b6 196 FALSE, /* pc_relative */
252b5132
RH		 197 0, /* bitpos */
198 complain_overflow_dont, /* complain_on_overflow */
199 v850_elf_reloc, /* special_function */
e30ddb24 200 "R_V850_ABS32", /* name */
b34976b6 201 FALSE, /* partial_inplace */
252b5132
RH		 202 0xffffffff, /* src_mask */
203 0xffffffff, /* dst_mask */
b34976b6 204 FALSE), /* pcrel_offset */
252b5132
RH		 205
206 /* Simple 16bit reloc. */
207 HOWTO (R_V850_16, /* type */
208 0, /* rightshift */
209 1, /* size (0 = byte, 1 = short, 2 = long) */
210 16, /* bitsize */
b34976b6 211 FALSE, /* pc_relative */
252b5132
RH		 212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_V850_16", /* name */
b34976b6 216 FALSE, /* partial_inplace */
252b5132
RH		 217 0xffff, /* src_mask */
218 0xffff, /* dst_mask */
b34976b6 219 FALSE), /* pcrel_offset */
252b5132
RH		 220
221 /* Simple 8bit reloc. */
222 HOWTO (R_V850_8, /* type */
223 0, /* rightshift */
224 0, /* size (0 = byte, 1 = short, 2 = long) */
225 8, /* bitsize */
b34976b6 226 FALSE, /* pc_relative */
252b5132
RH		 227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_V850_8", /* name */
b34976b6 231 FALSE, /* partial_inplace */
252b5132
RH		 232 0xff, /* src_mask */
233 0xff, /* dst_mask */
b34976b6 234 FALSE), /* pcrel_offset */
252b5132
RH		 235
236 /* 16 bit offset from the short data area pointer. */
237 HOWTO (R_V850_SDA_16_16_OFFSET, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
b34976b6 241 FALSE, /* pc_relative */
252b5132
RH		 242 0, /* bitpos */
243 complain_overflow_dont, /* complain_on_overflow */
244 v850_elf_reloc, /* special_function */
245 "R_V850_SDA_16_16_OFFSET", /* name */
b34976b6 246 FALSE, /* partial_inplace */
252b5132
RH		 247 0xffff, /* src_mask */
248 0xffff, /* dst_mask */
b34976b6 249 FALSE), /* pcrel_offset */
252b5132
RH		 250
251 /* 15 bit offset from the short data area pointer. */
252 HOWTO (R_V850_SDA_15_16_OFFSET, /* type */
253 1, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
b34976b6 256 FALSE, /* pc_relative */
252b5132
RH		 257 1, /* bitpos */
258 complain_overflow_dont, /* complain_on_overflow */
259 v850_elf_reloc, /* special_function */
260 "R_V850_SDA_15_16_OFFSET", /* name */
b34976b6 261 FALSE, /* partial_inplace */
252b5132
RH		 262 0xfffe, /* src_mask */
263 0xfffe, /* dst_mask */
b34976b6 264 FALSE), /* pcrel_offset */
252b5132
RH		 265
266 /* 16 bit offset from the zero data area pointer. */
267 HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */
268 0, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
b34976b6 271 FALSE, /* pc_relative */
252b5132
RH		 272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 v850_elf_reloc, /* special_function */
275 "R_V850_ZDA_16_16_OFFSET", /* name */
b34976b6 276 FALSE, /* partial_inplace */
252b5132
RH		 277 0xffff, /* src_mask */
278 0xffff, /* dst_mask */
b34976b6 279 FALSE), /* pcrel_offset */
252b5132
RH		 280
281 /* 15 bit offset from the zero data area pointer. */
282 HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */
283 1, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
b34976b6 286 FALSE, /* pc_relative */
252b5132
RH		 287 1, /* bitpos */
288 complain_overflow_dont, /* complain_on_overflow */
289 v850_elf_reloc, /* special_function */
290 "R_V850_ZDA_15_16_OFFSET", /* name */
b34976b6 291 FALSE, /* partial_inplace */
252b5132
RH		 292 0xfffe, /* src_mask */
293 0xfffe, /* dst_mask */
b34976b6 294 FALSE), /* pcrel_offset */
252b5132
RH		 295
296 /* 6 bit offset from the tiny data area pointer. */
297 HOWTO (R_V850_TDA_6_8_OFFSET, /* type */
298 2, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 8, /* bitsize */
b34976b6 301 FALSE, /* pc_relative */
252b5132
RH		 302 1, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 v850_elf_reloc, /* special_function */
305 "R_V850_TDA_6_8_OFFSET", /* name */
b34976b6 306 FALSE, /* partial_inplace */
252b5132
RH		 307 0x7e, /* src_mask */
308 0x7e, /* dst_mask */
b34976b6 309 FALSE), /* pcrel_offset */
252b5132
RH		 310
311 /* 8 bit offset from the tiny data area pointer. */
312 HOWTO (R_V850_TDA_7_8_OFFSET, /* type */
313 1, /* rightshift */
314 1, /* size (0 = byte, 1 = short, 2 = long) */
315 8, /* bitsize */
b34976b6 316 FALSE, /* pc_relative */
252b5132
RH		 317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 v850_elf_reloc, /* special_function */
320 "R_V850_TDA_7_8_OFFSET", /* name */
b34976b6 321 FALSE, /* partial_inplace */
252b5132
RH		 322 0x7f, /* src_mask */
323 0x7f, /* dst_mask */
b34976b6 324 FALSE), /* pcrel_offset */
435b1e90 325
252b5132
RH		 326 /* 7 bit offset from the tiny data area pointer. */
327 HOWTO (R_V850_TDA_7_7_OFFSET, /* type */
328 0, /* rightshift */
329 1, /* size (0 = byte, 1 = short, 2 = long) */
330 7, /* bitsize */
b34976b6 331 FALSE, /* pc_relative */
252b5132
RH		 332 0, /* bitpos */
333 complain_overflow_dont, /* complain_on_overflow */
334 v850_elf_reloc, /* special_function */
335 "R_V850_TDA_7_7_OFFSET", /* name */
b34976b6 336 FALSE, /* partial_inplace */
252b5132
RH		 337 0x7f, /* src_mask */
338 0x7f, /* dst_mask */
b34976b6 339 FALSE), /* pcrel_offset */
252b5132
RH		 340
341 /* 16 bit offset from the tiny data area pointer! */
342 HOWTO (R_V850_TDA_16_16_OFFSET, /* type */
343 0, /* rightshift */
344 1, /* size (0 = byte, 1 = short, 2 = long) */
345 16, /* bitsize */
b34976b6 346 FALSE, /* pc_relative */
252b5132
RH		 347 0, /* bitpos */
348 complain_overflow_dont, /* complain_on_overflow */
349 v850_elf_reloc, /* special_function */
350 "R_V850_TDA_16_16_OFFSET", /* name */
b34976b6 351 FALSE, /* partial_inplace */
252b5132
RH		 352 0xffff, /* src_mask */
353 0xfff, /* dst_mask */
b34976b6 354 FALSE), /* pcrel_offset */
252b5132
RH		 355
356 /* 5 bit offset from the tiny data area pointer. */
357 HOWTO (R_V850_TDA_4_5_OFFSET, /* type */
358 1, /* rightshift */
359 1, /* size (0 = byte, 1 = short, 2 = long) */
360 5, /* bitsize */
b34976b6 361 FALSE, /* pc_relative */
252b5132
RH		 362 0, /* bitpos */
363 complain_overflow_dont, /* complain_on_overflow */
364 v850_elf_reloc, /* special_function */
365 "R_V850_TDA_4_5_OFFSET", /* name */
b34976b6 366 FALSE, /* partial_inplace */
252b5132
RH		 367 0x0f, /* src_mask */
368 0x0f, /* dst_mask */
b34976b6 369 FALSE), /* pcrel_offset */
252b5132
RH		 370
371 /* 4 bit offset from the tiny data area pointer. */
372 HOWTO (R_V850_TDA_4_4_OFFSET, /* type */
373 0, /* rightshift */
374 1, /* size (0 = byte, 1 = short, 2 = long) */
375 4, /* bitsize */
b34976b6 376 FALSE, /* pc_relative */
252b5132
RH		 377 0, /* bitpos */
378 complain_overflow_dont, /* complain_on_overflow */
379 v850_elf_reloc, /* special_function */
380 "R_V850_TDA_4_4_OFFSET", /* name */
b34976b6 381 FALSE, /* partial_inplace */
252b5132
RH		 382 0x0f, /* src_mask */
383 0x0f, /* dst_mask */
b34976b6 384 FALSE), /* pcrel_offset */
252b5132
RH		 385
386 /* 16 bit offset from the short data area pointer. */
387 HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
b34976b6 391 FALSE, /* pc_relative */
252b5132
RH		 392 0, /* bitpos */
393 complain_overflow_dont, /* complain_on_overflow */
394 v850_elf_reloc, /* special_function */
395 "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */
b34976b6 396 FALSE, /* partial_inplace */
252b5132
RH		 397 0xfffe0020, /* src_mask */
398 0xfffe0020, /* dst_mask */
b34976b6 399 FALSE), /* pcrel_offset */
252b5132
RH		 400
401 /* 16 bit offset from the zero data area pointer. */
402 HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */
403 0, /* rightshift */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
b34976b6 406 FALSE, /* pc_relative */
252b5132
RH		 407 0, /* bitpos */
408 complain_overflow_dont, /* complain_on_overflow */
409 v850_elf_reloc, /* special_function */
410 "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */
b34976b6 411 FALSE, /* partial_inplace */
252b5132
RH		 412 0xfffe0020, /* src_mask */
413 0xfffe0020, /* dst_mask */
b34976b6 414 FALSE), /* pcrel_offset */
252b5132
RH		 415
416 /* 6 bit offset from the call table base pointer. */
417 HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */
418 0, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 7, /* bitsize */
b34976b6 421 FALSE, /* pc_relative */
252b5132
RH		 422 0, /* bitpos */
423 complain_overflow_dont, /* complain_on_overflow */
424 v850_elf_reloc, /* special_function */
425 "R_V850_CALLT_6_7_OFFSET", /* name */
b34976b6 426 FALSE, /* partial_inplace */
252b5132
RH		 427 0x3f, /* src_mask */
428 0x3f, /* dst_mask */
b34976b6 429 FALSE), /* pcrel_offset */
252b5132
RH		 430
431 /* 16 bit offset from the call table base pointer. */
432 HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */
433 0, /* rightshift */
434 1, /* size (0 = byte, 1 = short, 2 = long) */
435 16, /* bitsize */
b34976b6 436 FALSE, /* pc_relative */
252b5132
RH		 437 0, /* bitpos */
438 complain_overflow_dont, /* complain_on_overflow */
439 v850_elf_reloc, /* special_function */
440 "R_V850_CALLT_16_16_OFFSET", /* name */
b34976b6 441 FALSE, /* partial_inplace */
252b5132
RH		 442 0xffff, /* src_mask */
443 0xffff, /* dst_mask */
b34976b6 444 FALSE), /* pcrel_offset */
252b5132
RH		 445
446 /* GNU extension to record C++ vtable hierarchy */
447 HOWTO (R_V850_GNU_VTINHERIT, /* type */
448 0, /* rightshift */
449 2, /* size (0 = byte, 1 = short, 2 = long) */
450 0, /* bitsize */
b34976b6 451 FALSE, /* pc_relative */
252b5132
RH		 452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 NULL, /* special_function */
455 "R_V850_GNU_VTINHERIT", /* name */
b34976b6 456 FALSE, /* partial_inplace */
252b5132
RH		 457 0, /* src_mask */
458 0, /* dst_mask */
b34976b6 459 FALSE), /* pcrel_offset */
252b5132
RH		 460
461 /* GNU extension to record C++ vtable member usage */
462 HOWTO (R_V850_GNU_VTENTRY, /* type */
463 0, /* rightshift */
464 2, /* size (0 = byte, 1 = short, 2 = long) */
465 0, /* bitsize */
b34976b6 466 FALSE, /* pc_relative */
252b5132
RH		 467 0, /* bitpos */
468 complain_overflow_dont, /* complain_on_overflow */
469 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
470 "R_V850_GNU_VTENTRY", /* name */
b34976b6 471 FALSE, /* partial_inplace */
252b5132
RH		 472 0, /* src_mask */
473 0, /* dst_mask */
b34976b6 474 FALSE), /* pcrel_offset */
435b1e90 475
86aba9db
NC		 476 /* Indicates a .longcall pseudo-op. The compiler will generate a .longcall
477 pseudo-op when it finds a function call which can be relaxed. */
478 HOWTO (R_V850_LONGCALL, /* type */
479 0, /* rightshift */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
481 32, /* bitsize */
b34976b6 482 TRUE, /* pc_relative */
86aba9db
NC		 483 0, /* bitpos */
484 complain_overflow_signed, /* complain_on_overflow */
485 v850_elf_ignore_reloc, /* special_function */
486 "R_V850_LONGCALL", /* name */
b34976b6 487 FALSE, /* partial_inplace */
86aba9db
NC		 488 0, /* src_mask */
489 0, /* dst_mask */
b34976b6 490 TRUE), /* pcrel_offset */
86aba9db
NC		 491
492 /* Indicates a .longjump pseudo-op. The compiler will generate a
493 .longjump pseudo-op when it finds a branch which can be relaxed. */
494 HOWTO (R_V850_LONGJUMP, /* type */
495 0, /* rightshift */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
497 32, /* bitsize */
b34976b6 498 TRUE, /* pc_relative */
86aba9db
NC		 499 0, /* bitpos */
500 complain_overflow_signed, /* complain_on_overflow */
501 v850_elf_ignore_reloc, /* special_function */
502 "R_V850_LONGJUMP", /* name */
b34976b6 503 FALSE, /* partial_inplace */
86aba9db
NC		 504 0, /* src_mask */
505 0, /* dst_mask */
b34976b6 506 TRUE), /* pcrel_offset */
86aba9db
NC		 507
508 HOWTO (R_V850_ALIGN, /* type */
509 0, /* rightshift */
510 1, /* size (0 = byte, 1 = short, 2 = long) */
511 0, /* bitsize */
b34976b6 512 FALSE, /* pc_relative */
86aba9db
NC		 513 0, /* bitpos */
514 complain_overflow_unsigned, /* complain_on_overflow */
515 v850_elf_ignore_reloc, /* special_function */
516 "R_V850_ALIGN", /* name */
b34976b6 517 FALSE, /* partial_inplace */
86aba9db
NC		 518 0, /* src_mask */
519 0, /* dst_mask */
b34976b6 520 TRUE), /* pcrel_offset */
e30ddb24
NC		 521
522 /* Simple pc-relative 32bit reloc. */
523 HOWTO (R_V850_REL32, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 TRUE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 v850_elf_reloc, /* special_function */
531 "R_V850_REL32", /* name */
532 FALSE, /* partial_inplace */
533 0xffffffff, /* src_mask */
534 0xffffffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
252b5132
RH		 536};
537
538/* Map BFD reloc types to V850 ELF reloc types. */
539
540struct v850_elf_reloc_map
541{
542 /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an
543 unsigned char. */
544 bfd_reloc_code_real_type bfd_reloc_val;
917583ad 545 unsigned int elf_reloc_val;
252b5132
RH		 546};
547
548static const struct v850_elf_reloc_map v850_elf_reloc_map[] =
549{
86aba9db
NC		 550 { BFD_RELOC_NONE, R_V850_NONE },
551 { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL },
552 { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL },
553 { BFD_RELOC_HI16_S, R_V850_HI16_S },
554 { BFD_RELOC_HI16, R_V850_HI16 },
555 { BFD_RELOC_LO16, R_V850_LO16 },
e30ddb24
NC		 556 { BFD_RELOC_32, R_V850_ABS32 },
557 { BFD_RELOC_32_PCREL, R_V850_REL32 },
86aba9db
NC		 558 { BFD_RELOC_16, R_V850_16 },
559 { BFD_RELOC_8, R_V850_8 },
560 { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET },
561 { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET },
562 { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET },
563 { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET },
564 { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET },
565 { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET },
566 { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET },
567 { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET },
252b5132
RH		 568 { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET },
569 { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET },
570 { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET },
571 { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET },
572 { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET },
573 { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET },
86aba9db
NC		 574 { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT },
575 { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY },
576 { BFD_RELOC_V850_LONGCALL, R_V850_LONGCALL },
577 { BFD_RELOC_V850_LONGJUMP, R_V850_LONGJUMP },
578 { BFD_RELOC_V850_ALIGN, R_V850_ALIGN },
252b5132
RH		 579
580};
252b5132 581\f
e12dd2ea
NC		 582/* Map a bfd relocation into the appropriate howto structure. */
583
252b5132
RH		 584static reloc_howto_type *
585v850_elf_reloc_type_lookup (abfd, code)
b34976b6
AM		 586 bfd *abfd ATTRIBUTE_UNUSED;
587 bfd_reloc_code_real_type code;
252b5132
RH		 588{
589 unsigned int i;
590
e12dd2ea
NC		 591 for (i = ARRAY_SIZE (v850_elf_reloc_map); i --;)
592 if (v850_elf_reloc_map[i].bfd_reloc_val == code)
593 {
917583ad 594 unsigned int elf_reloc_val = v850_elf_reloc_map[i].elf_reloc_val;
dc810e39 595
fbad9a25 596 BFD_ASSERT (v850_elf_howto_table[elf_reloc_val].type == elf_reloc_val);
435b1e90 597
fbad9a25 598 return v850_elf_howto_table + elf_reloc_val;
e12dd2ea 599 }
252b5132
RH		 600
601 return NULL;
602}
252b5132
RH		 603\f
604/* Set the howto pointer for an V850 ELF reloc. */
e12dd2ea 605
252b5132
RH		 606static void
607v850_elf_info_to_howto_rel (abfd, cache_ptr, dst)
b34976b6
AM		 608 bfd *abfd ATTRIBUTE_UNUSED;
609 arelent *cache_ptr;
610 Elf_Internal_Rela *dst;
252b5132
RH		 611{
612 unsigned int r_type;
613
614 r_type = ELF32_R_TYPE (dst->r_info);
615 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
616 cache_ptr->howto = &v850_elf_howto_table[r_type];
617}
618
435b1e90 619/* Set the howto pointer for a V850 ELF reloc (type RELA). */
252b5132
RH		 620static void
621v850_elf_info_to_howto_rela (abfd, cache_ptr, dst)
b34976b6
AM		 622 bfd *abfd ATTRIBUTE_UNUSED;
623 arelent * cache_ptr;
624 Elf_Internal_Rela *dst;
252b5132
RH		 625{
626 unsigned int r_type;
627
628 r_type = ELF32_R_TYPE (dst->r_info);
629 BFD_ASSERT (r_type < (unsigned int) R_V850_max);
630 cache_ptr->howto = &v850_elf_howto_table[r_type];
631}
252b5132
RH		 632\f
633/* Look through the relocs for a section during the first phase, and
634 allocate space in the global offset table or procedure linkage
635 table. */
636
b34976b6 637static bfd_boolean
252b5132 638v850_elf_check_relocs (abfd, info, sec, relocs)
b34976b6
AM		 639 bfd *abfd;
640 struct bfd_link_info *info;
641 asection *sec;
642 const Elf_Internal_Rela *relocs;
252b5132 643{
b34976b6 644 bfd_boolean ret = TRUE;
252b5132
RH		 645 bfd *dynobj;
646 Elf_Internal_Shdr *symtab_hdr;
647 struct elf_link_hash_entry **sym_hashes;
648 const Elf_Internal_Rela *rel;
649 const Elf_Internal_Rela *rel_end;
650 asection *sreloc;
651 enum v850_reloc_type r_type;
652 int other = 0;
653 const char *common = (const char *)0;
654
1049f94e 655 if (info->relocatable)
b34976b6 656 return TRUE;
252b5132
RH		 657
658#ifdef DEBUG
d003868e
AM		 659 _bfd_error_handler ("v850_elf_check_relocs called for section %A in %B",
660 sec, abfd);
252b5132
RH		 661#endif
662
663 dynobj = elf_hash_table (info)->dynobj;
664 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
665 sym_hashes = elf_sym_hashes (abfd);
666 sreloc = NULL;
667
668 rel_end = relocs + sec->reloc_count;
669 for (rel = relocs; rel < rel_end; rel++)
670 {
671 unsigned long r_symndx;
672 struct elf_link_hash_entry *h;
673
674 r_symndx = ELF32_R_SYM (rel->r_info);
675 if (r_symndx < symtab_hdr->sh_info)
676 h = NULL;
677 else
678 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
679
680 r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info);
681 switch (r_type)
682 {
683 default:
684 case R_V850_NONE:
685 case R_V850_9_PCREL:
686 case R_V850_22_PCREL:
687 case R_V850_HI16_S:
688 case R_V850_HI16:
689 case R_V850_LO16:
e30ddb24
NC		 690 case R_V850_ABS32:
691 case R_V850_REL32:
252b5132
RH		 692 case R_V850_16:
693 case R_V850_8:
694 case R_V850_CALLT_6_7_OFFSET:
695 case R_V850_CALLT_16_16_OFFSET:
696 break;
697
698 /* This relocation describes the C++ object vtable hierarchy.
699 Reconstruct it for later use during GC. */
700 case R_V850_GNU_VTINHERIT:
c152c796 701 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 702 return FALSE;
252b5132
RH		 703 break;
704
e12dd2ea
NC		 705 /* This relocation describes which C++ vtable entries
706 are actually used. Record for later use during GC. */
252b5132 707 case R_V850_GNU_VTENTRY:
c152c796 708 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 709 return FALSE;
252b5132
RH		 710 break;
711
712 case R_V850_SDA_16_16_SPLIT_OFFSET:
713 case R_V850_SDA_16_16_OFFSET:
714 case R_V850_SDA_15_16_OFFSET:
715 other = V850_OTHER_SDA;
716 common = ".scommon";
717 goto small_data_common;
435b1e90 718
252b5132
RH		 719 case R_V850_ZDA_16_16_SPLIT_OFFSET:
720 case R_V850_ZDA_16_16_OFFSET:
721 case R_V850_ZDA_15_16_OFFSET:
722 other = V850_OTHER_ZDA;
723 common = ".zcommon";
724 goto small_data_common;
435b1e90 725
252b5132
RH		 726 case R_V850_TDA_4_5_OFFSET:
727 case R_V850_TDA_4_4_OFFSET:
728 case R_V850_TDA_6_8_OFFSET:
729 case R_V850_TDA_7_8_OFFSET:
730 case R_V850_TDA_7_7_OFFSET:
731 case R_V850_TDA_16_16_OFFSET:
732 other = V850_OTHER_TDA;
733 common = ".tcommon";
734 /* fall through */
735
736#define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA)
737
738 small_data_common:
739 if (h)
740 {
e12dd2ea
NC		 741 /* Flag which type of relocation was used. */
742 h->other |= other;
252b5132
RH		 743 if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK)
744 && (h->other & V850_OTHER_ERROR) == 0)
745 {
746 const char * msg;
747 static char buff[200]; /* XXX */
748
749 switch (h->other & V850_OTHER_MASK)
750 {
751 default:
752 msg = _("Variable `%s' cannot occupy in multiple small data regions");
753 break;
754 case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA:
755 msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions");
756 break;
757 case V850_OTHER_SDA | V850_OTHER_ZDA:
758 msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously");
759 break;
760 case V850_OTHER_SDA | V850_OTHER_TDA:
761 msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously");
762 break;
763 case V850_OTHER_ZDA | V850_OTHER_TDA:
764 msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously");
765 break;
766 }
767
768 sprintf (buff, msg, h->root.root.string);
769 info->callbacks->warning (info, buff, h->root.root.string,
dc810e39
AM		 770 abfd, h->root.u.def.section,
771 (bfd_vma) 0);
252b5132
RH		 772
773 bfd_set_error (bfd_error_bad_value);
774 h->other |= V850_OTHER_ERROR;
b34976b6 775 ret = FALSE;
252b5132
RH		 776 }
777 }
778
779 if (h && h->root.type == bfd_link_hash_common
780 && h->root.u.c.p
781 && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON"))
782 {
e12dd2ea
NC		 783 asection * section;
784
785 section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common);
252b5132
RH		 786 section->flags |= SEC_IS_COMMON;
787 }
788
789#ifdef DEBUG
790 fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n",
791 v850_elf_howto_table[ (int)r_type ].name,
792 (h && h->root.root.string) ? h->root.root.string : "<unknown>",
793 (h->root.type == bfd_link_hash_common) ? ", symbol is common" : "");
794#endif
795 break;
796 }
797 }
798
799 return ret;
800}
801
e12dd2ea
NC		 802/* In the old version, when an entry was checked out from the table,
803 it was deleted. This produced an error if the entry was needed
804 more than once, as the second attempted retry failed.
805
806 In the current version, the entry is not deleted, instead we set
b34976b6 807 the field 'found' to TRUE. If a second lookup matches the same
e12dd2ea
NC		 808 entry, then we know that the hi16s reloc has already been updated
809 and does not need to be updated a second time.
810
811 TODO - TOFIX: If it is possible that we need to restore 2 different
812 addresses from the same table entry, where the first generates an
813 overflow, whilst the second do not, then this code will fail. */
252b5132
RH		 814
815typedef struct hi16s_location
816{
b34976b6
AM		 817 bfd_vma addend;
818 bfd_byte *address;
252b5132 819 unsigned long counter;
b34976b6
AM		 820 bfd_boolean found;
821 struct hi16s_location *next;
252b5132
RH		 822}
823hi16s_location;
824
b34976b6
AM		 825static hi16s_location *previous_hi16s;
826static hi16s_location *free_hi16s;
827static unsigned long hi16s_counter;
252b5132
RH		 828
829static void
830remember_hi16s_reloc (abfd, addend, address)
b34976b6
AM		 831 bfd *abfd;
832 bfd_vma addend;
833 bfd_byte *address;
252b5132
RH		 834{
835 hi16s_location * entry = NULL;
dc810e39 836 bfd_size_type amt = sizeof (* free_hi16s);
435b1e90 837
252b5132
RH		 838 /* Find a free structure. */
839 if (free_hi16s == NULL)
dc810e39 840 free_hi16s = (hi16s_location *) bfd_zalloc (abfd, amt);
252b5132
RH		 841
842 entry = free_hi16s;
843 free_hi16s = free_hi16s->next;
435b1e90 844
252b5132
RH		 845 entry->addend = addend;
846 entry->address = address;
847 entry->counter = hi16s_counter ++;
b34976b6 848 entry->found = FALSE;
252b5132
RH		 849 entry->next = previous_hi16s;
850 previous_hi16s = entry;
435b1e90 851
252b5132
RH		 852 /* Cope with wrap around of our counter. */
853 if (hi16s_counter == 0)
854 {
855 /* XXX - Assume that all counter entries differ only in their low 16 bits. */
856 for (entry = previous_hi16s; entry != NULL; entry = entry->next)
857 entry->counter &= 0xffff;
858
859 hi16s_counter = 0x10000;
860 }
435b1e90 861
252b5132
RH		 862 return;
863}
864
865static bfd_byte *
866find_remembered_hi16s_reloc (addend, already_found)
b34976b6
AM		 867 bfd_vma addend;
868 bfd_boolean *already_found;
252b5132 869{
b34976b6
AM		 870 hi16s_location *match = NULL;
871 hi16s_location *entry;
872 hi16s_location *previous = NULL;
873 hi16s_location *prev;
874 bfd_byte *addr;
435b1e90 875
252b5132
RH		 876 /* Search the table. Record the most recent entry that matches. */
877 for (entry = previous_hi16s; entry; entry = entry->next)
878 {
879 if (entry->addend == addend
880 && (match == NULL || match->counter < entry->counter))
881 {
882 previous = prev;
883 match = entry;
884 }
435b1e90 885
252b5132
RH		 886 prev = entry;
887 }
888
889 if (match == NULL)
890 return NULL;
891
892 /* Extract the address. */
893 addr = match->address;
894
4cc11e76 895 /* Remember if this entry has already been used before. */
252b5132
RH		 896 if (already_found)
897 * already_found = match->found;
898
899 /* Note that this entry has now been used. */
b34976b6 900 match->found = TRUE;
435b1e90 901
252b5132 902 return addr;
435b1e90 903}
252b5132
RH		 904
905/* FIXME: The code here probably ought to be removed and the code in reloc.c
4cc11e76 906 allowed to do its stuff instead. At least for most of the relocs, anyway. */
e12dd2ea 907
252b5132
RH		 908static bfd_reloc_status_type
909v850_elf_perform_relocation (abfd, r_type, addend, address)
dc810e39
AM		 910 bfd *abfd;
911 unsigned int r_type;
912 bfd_vma addend;
913 bfd_byte *address;
252b5132
RH		 914{
915 unsigned long insn;
916 bfd_signed_vma saddend = (bfd_signed_vma) addend;
435b1e90 917
252b5132
RH		 918 switch (r_type)
919 {
920 default:
921 /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */
922 return bfd_reloc_notsupported;
435b1e90 923
e30ddb24
NC		 924 case R_V850_REL32:
925 case R_V850_ABS32:
252b5132
RH		 926 bfd_put_32 (abfd, addend, address);
927 return bfd_reloc_ok;
435b1e90 928
252b5132
RH		 929 case R_V850_22_PCREL:
930 if (saddend > 0x1fffff || saddend < -0x200000)
931 return bfd_reloc_overflow;
435b1e90 932
252b5132
RH		 933 if ((addend % 2) != 0)
934 return bfd_reloc_dangerous;
435b1e90 935
252b5132
RH		 936 insn = bfd_get_32 (abfd, address);
937 insn &= ~0xfffe003f;
938 insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16));
dc810e39 939 bfd_put_32 (abfd, (bfd_vma) insn, address);
252b5132 940 return bfd_reloc_ok;
435b1e90 941
252b5132
RH		 942 case R_V850_9_PCREL:
943 if (saddend > 0xff || saddend < -0x100)
944 return bfd_reloc_overflow;
435b1e90 945
252b5132
RH		 946 if ((addend % 2) != 0)
947 return bfd_reloc_dangerous;
435b1e90 948
252b5132
RH		 949 insn = bfd_get_16 (abfd, address);
950 insn &= ~ 0xf870;
951 insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3);
952 break;
435b1e90 953
252b5132
RH		 954 case R_V850_HI16:
955 addend += (bfd_get_16 (abfd, address) << 16);
956 addend = (addend >> 16);
957 insn = addend;
958 break;
435b1e90 959
252b5132
RH		 960 case R_V850_HI16_S:
961 /* Remember where this relocation took place. */
962 remember_hi16s_reloc (abfd, addend, address);
963
964 addend += (bfd_get_16 (abfd, address) << 16);
965 addend = (addend >> 16) + ((addend & 0x8000) != 0);
435b1e90
KH		 966
967 /* This relocation cannot overflow. */
252b5132
RH		 968 if (addend > 0x7fff)
969 addend = 0;
435b1e90 970
252b5132
RH		 971 insn = addend;
972 break;
435b1e90 973
252b5132
RH		 974 case R_V850_LO16:
975 /* Calculate the sum of the value stored in the instruction and the
976 addend and check for overflow from the low 16 bits into the high
977 16 bits. The assembler has already done some of this: If the
978 value stored in the instruction has its 15th bit set, (counting
979 from zero) then the assembler will have added 1 to the value
980 stored in the associated HI16S reloc. So for example, these
981 relocations:
982
983 movhi hi( fred ), r0, r1
984 movea lo( fred ), r1, r1
985
986 will store 0 in the value fields for the MOVHI and MOVEA instructions
987 and addend will be the address of fred, but for these instructions:
988
989 movhi hi( fred + 0x123456), r0, r1
990 movea lo( fred + 0x123456), r1, r1
991
992 the value stored in the MOVHI instruction will be 0x12 and the value
993 stored in the MOVEA instruction will be 0x3456. If however the
994 instructions were:
995
996 movhi hi( fred + 0x10ffff), r0, r1
997 movea lo( fred + 0x10ffff), r1, r1
998
999 then the value stored in the MOVHI instruction would be 0x11 (not
1000 0x10) and the value stored in the MOVEA instruction would be 0xffff.
1001 Thus (assuming for the moment that the addend is 0), at run time the
1002 MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction
1003 adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if
1004 the instructions were:
1005
1006 movhi hi( fred - 1), r0, r1
1007 movea lo( fred - 1), r1, r1
1008
1009 then 0 is stored in the MOVHI instruction and -1 is stored in the
1010 MOVEA instruction.
1011
1012 Overflow can occur if the addition of the value stored in the
1013 instruction plus the addend sets the 15th bit when before it was clear.
1014 This is because the 15th bit will be sign extended into the high part,
1015 thus reducing its value by one, but since the 15th bit was originally
1016 clear, the assembler will not have added 1 to the previous HI16S reloc
1017 to compensate for this effect. For example:
1018
1019 movhi hi( fred + 0x123456), r0, r1
1020 movea lo( fred + 0x123456), r1, r1
1021
1022 The value stored in HI16S reloc is 0x12, the value stored in the LO16
1023 reloc is 0x3456. If we assume that the address of fred is 0x00007000
1024 then the relocations become:
1025
1026 HI16S: 0x0012 + (0x00007000 >> 16) = 0x12
1027 LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456
1028
1029 but when the instructions are executed, the MOVEA instruction's value
1030 is signed extended, so the sum becomes:
1031
1032 0x00120000
1033 + 0xffffa456
1034 ------------
1035 0x0011a456 but 'fred + 0x123456' = 0x0012a456
1036
1037 Note that if the 15th bit was set in the value stored in the LO16
1038 reloc, then we do not have to do anything:
1039
1040 movhi hi( fred + 0x10ffff), r0, r1
1041 movea lo( fred + 0x10ffff), r1, r1
1042
1043 HI16S: 0x0011 + (0x00007000 >> 16) = 0x11
1044 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff
1045
1046 0x00110000
1047 + 0x00006fff
1048 ------------
1049 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff
1050
252b5132
RH		 1051 Overflow can also occur if the computation carries into the 16th bit
1052 and it also results in the 15th bit having the same value as the 15th
1053 bit of the original value. What happens is that the HI16S reloc
1054 will have already examined the 15th bit of the original value and
1055 added 1 to the high part if the bit is set. This compensates for the
1056 sign extension of 15th bit of the result of the computation. But now
1057 there is a carry into the 16th bit, and this has not been allowed for.
1058
1059 So, for example if fred is at address 0xf000:
1060
1061 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1062 movea lo( fred + 0xffff), r1, r1
1063
1064 HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001
1065 LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost)
1066
1067 0x00010000
1068 + 0xffffefff
1069 ------------
1070 0x0000efff but 'fred + 0xffff' = 0x0001efff
1071
1072 Similarly, if the 15th bit remains clear, but overflow occurs into
1073 the 16th bit then (assuming the address of fred is 0xf000):
1074
1075 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1076 movea lo( fred + 0x7000), r1, r1
1077
1078 HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000
1079 LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1080
1081 0x00000000
1082 + 0x00006fff
1083 ------------
1084 0x00006fff but 'fred + 0x7000' = 0x00016fff
435b1e90 1085
252b5132
RH		 1086 Note - there is no need to change anything if a carry occurs, and the
1087 15th bit changes its value from being set to being clear, as the HI16S
1088 reloc will have already added in 1 to the high part for us:
1089
1090 movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set]
1091 movea lo( fred + 0xffff), r1, r1
1092
1093 HI16S: 0x0001 + (0x00007000 >> 16)
1094 LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost)
1095
1096 0x00010000
1097 + 0x00006fff (bit 15 not set, so the top half is zero)
1098 ------------
1099 0x00016fff which is right (assuming that fred is at 0x7000)
1100
1101 but if the 15th bit goes from being clear to being set, then we must
1102 once again handle overflow:
1103
1104 movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear]
1105 movea lo( fred + 0x7000), r1, r1
1106
1107 HI16S: 0x0000 + (0x0000ffff >> 16)
1108 LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16)
1109
1110 0x00000000
1111 + 0x00006fff (bit 15 not set, so the top half is zero)
1112 ------------
e12dd2ea 1113 0x00006fff which is wrong (assuming that fred is at 0xffff). */
252b5132
RH		 1114 {
1115 long result;
1116
1117 insn = bfd_get_16 (abfd, address);
1118 result = insn + addend;
1119
1120#define BIT15_SET(x) ((x) & 0x8000)
1121#define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff)
435b1e90 1122
252b5132
RH		 1123 if ((BIT15_SET (result) && ! BIT15_SET (addend))
1124 || (OVERFLOWS (addend, insn)
1125 && ((! BIT15_SET (insn)) || (BIT15_SET (addend)))))
1126 {
b34976b6
AM		 1127 bfd_boolean already_updated;
1128 bfd_byte *hi16s_address = find_remembered_hi16s_reloc
252b5132 1129 (addend, & already_updated);
435b1e90 1130
252b5132
RH		 1131 /* Amend the matching HI16_S relocation. */
1132 if (hi16s_address != NULL)
1133 {
1134 if (! already_updated)
1135 {
1136 insn = bfd_get_16 (abfd, hi16s_address);
1137 insn += 1;
dc810e39 1138 bfd_put_16 (abfd, (bfd_vma) insn, hi16s_address);
252b5132
RH		 1139 }
1140 }
1141 else
1142 {
1143 fprintf (stderr, _("FAILED to find previous HI16 reloc\n"));
1144 return bfd_reloc_overflow;
1145 }
1146 }
435b1e90 1147
252b5132
RH		 1148 /* Do not complain if value has top bit set, as this has been anticipated. */
1149 insn = result & 0xffff;
1150 break;
1151 }
1152
1153 case R_V850_8:
1154 addend += (char) bfd_get_8 (abfd, address);
1155
1156 saddend = (bfd_signed_vma) addend;
435b1e90 1157
252b5132
RH		 1158 if (saddend > 0x7f || saddend < -0x80)
1159 return bfd_reloc_overflow;
1160
1161 bfd_put_8 (abfd, addend, address);
1162 return bfd_reloc_ok;
1163
1164 case R_V850_CALLT_16_16_OFFSET:
1165 addend += bfd_get_16 (abfd, address);
435b1e90 1166
252b5132 1167 saddend = (bfd_signed_vma) addend;
435b1e90 1168
252b5132
RH		 1169 if (saddend > 0xffff || saddend < 0)
1170 return bfd_reloc_overflow;
1171
1172 insn = addend;
1173 break;
435b1e90 1174
252b5132
RH		 1175 case R_V850_16:
1176
435b1e90 1177 /* drop through */
252b5132
RH		 1178 case R_V850_SDA_16_16_OFFSET:
1179 case R_V850_ZDA_16_16_OFFSET:
1180 case R_V850_TDA_16_16_OFFSET:
1181 addend += bfd_get_16 (abfd, address);
435b1e90 1182
252b5132 1183 saddend = (bfd_signed_vma) addend;
435b1e90 1184
252b5132
RH		 1185 if (saddend > 0x7fff || saddend < -0x8000)
1186 return bfd_reloc_overflow;
1187
1188 insn = addend;
1189 break;
435b1e90 1190
252b5132
RH		 1191 case R_V850_SDA_15_16_OFFSET:
1192 case R_V850_ZDA_15_16_OFFSET:
1193 insn = bfd_get_16 (abfd, address);
1194 addend += (insn & 0xfffe);
435b1e90 1195
252b5132 1196 saddend = (bfd_signed_vma) addend;
435b1e90 1197
252b5132
RH		 1198 if (saddend > 0x7ffe || saddend < -0x8000)
1199 return bfd_reloc_overflow;
435b1e90 1200
252b5132
RH		 1201 if (addend & 1)
1202 return bfd_reloc_dangerous;
435b1e90 1203
dc810e39 1204 insn = (addend &~ (bfd_vma) 1) | (insn & 1);
252b5132 1205 break;
435b1e90 1206
252b5132
RH		 1207 case R_V850_TDA_6_8_OFFSET:
1208 insn = bfd_get_16 (abfd, address);
1209 addend += ((insn & 0x7e) << 1);
435b1e90 1210
252b5132 1211 saddend = (bfd_signed_vma) addend;
435b1e90 1212
252b5132
RH		 1213 if (saddend > 0xfc || saddend < 0)
1214 return bfd_reloc_overflow;
435b1e90 1215
252b5132
RH		 1216 if (addend & 3)
1217 return bfd_reloc_dangerous;
435b1e90 1218
252b5132
RH		 1219 insn &= 0xff81;
1220 insn |= (addend >> 1);
1221 break;
435b1e90 1222
252b5132
RH		 1223 case R_V850_TDA_7_8_OFFSET:
1224 insn = bfd_get_16 (abfd, address);
1225 addend += ((insn & 0x7f) << 1);
435b1e90 1226
252b5132 1227 saddend = (bfd_signed_vma) addend;
435b1e90 1228
252b5132
RH		 1229 if (saddend > 0xfe || saddend < 0)
1230 return bfd_reloc_overflow;
435b1e90 1231
252b5132
RH		 1232 if (addend & 1)
1233 return bfd_reloc_dangerous;
435b1e90 1234
252b5132
RH		 1235 insn &= 0xff80;
1236 insn |= (addend >> 1);
1237 break;
435b1e90 1238
252b5132
RH		 1239 case R_V850_TDA_7_7_OFFSET:
1240 insn = bfd_get_16 (abfd, address);
1241 addend += insn & 0x7f;
435b1e90 1242
252b5132 1243 saddend = (bfd_signed_vma) addend;
435b1e90 1244
252b5132
RH		 1245 if (saddend > 0x7f || saddend < 0)
1246 return bfd_reloc_overflow;
435b1e90 1247
252b5132
RH		 1248 insn &= 0xff80;
1249 insn |= addend;
1250 break;
435b1e90 1251
252b5132
RH		 1252 case R_V850_TDA_4_5_OFFSET:
1253 insn = bfd_get_16 (abfd, address);
1254 addend += ((insn & 0xf) << 1);
435b1e90 1255
252b5132 1256 saddend = (bfd_signed_vma) addend;
435b1e90 1257
252b5132
RH		 1258 if (saddend > 0x1e || saddend < 0)
1259 return bfd_reloc_overflow;
435b1e90 1260
252b5132
RH		 1261 if (addend & 1)
1262 return bfd_reloc_dangerous;
435b1e90 1263
252b5132
RH		 1264 insn &= 0xfff0;
1265 insn |= (addend >> 1);
1266 break;
435b1e90 1267
252b5132
RH		 1268 case R_V850_TDA_4_4_OFFSET:
1269 insn = bfd_get_16 (abfd, address);
1270 addend += insn & 0xf;
435b1e90 1271
252b5132 1272 saddend = (bfd_signed_vma) addend;
435b1e90 1273
252b5132
RH		 1274 if (saddend > 0xf || saddend < 0)
1275 return bfd_reloc_overflow;
435b1e90 1276
252b5132
RH		 1277 insn &= 0xfff0;
1278 insn |= addend;
1279 break;
435b1e90 1280
252b5132
RH		 1281 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1282 case R_V850_SDA_16_16_SPLIT_OFFSET:
1283 insn = bfd_get_32 (abfd, address);
1284 addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5);
435b1e90 1285
252b5132 1286 saddend = (bfd_signed_vma) addend;
435b1e90 1287
252b5132
RH		 1288 if (saddend > 0x7fff || saddend < -0x8000)
1289 return bfd_reloc_overflow;
435b1e90 1290
252b5132
RH		 1291 insn &= 0x0001ffdf;
1292 insn |= (addend & 1) << 5;
dc810e39 1293 insn |= (addend &~ (bfd_vma) 1) << 16;
435b1e90 1294
dc810e39 1295 bfd_put_32 (abfd, (bfd_vma) insn, address);
252b5132 1296 return bfd_reloc_ok;
435b1e90 1297
252b5132
RH		 1298 case R_V850_CALLT_6_7_OFFSET:
1299 insn = bfd_get_16 (abfd, address);
1300 addend += ((insn & 0x3f) << 1);
435b1e90 1301
252b5132 1302 saddend = (bfd_signed_vma) addend;
435b1e90 1303
252b5132
RH		 1304 if (saddend > 0x7e || saddend < 0)
1305 return bfd_reloc_overflow;
435b1e90 1306
252b5132
RH		 1307 if (addend & 1)
1308 return bfd_reloc_dangerous;
435b1e90 1309
252b5132
RH		 1310 insn &= 0xff80;
1311 insn |= (addend >> 1);
1312 break;
1313
1314 case R_V850_GNU_VTINHERIT:
1315 case R_V850_GNU_VTENTRY:
1316 return bfd_reloc_ok;
1317
1318 }
1319
dc810e39 1320 bfd_put_16 (abfd, (bfd_vma) insn, address);
252b5132
RH		 1321 return bfd_reloc_ok;
1322}
252b5132
RH		 1323\f
1324/* Insert the addend into the instruction. */
e12dd2ea 1325
252b5132
RH		 1326static bfd_reloc_status_type
1327v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err)
b34976b6
AM		 1328 bfd *abfd ATTRIBUTE_UNUSED;
1329 arelent *reloc;
1330 asymbol *symbol;
1331 PTR data ATTRIBUTE_UNUSED;
1332 asection *isection;
1333 bfd *obfd;
1334 char **err ATTRIBUTE_UNUSED;
252b5132
RH		 1335{
1336 long relocation;
435b1e90 1337
252b5132
RH		 1338 /* If there is an output BFD,
1339 and the symbol is not a section name (which is only defined at final link time),
1340 and either we are not putting the addend into the instruction
e12dd2ea 1341 or the addend is zero, so there is nothing to add into the instruction
252b5132
RH		 1342 then just fixup the address and return. */
1343 if (obfd != (bfd *) NULL
1344 && (symbol->flags & BSF_SECTION_SYM) == 0
1345 && (! reloc->howto->partial_inplace
1346 || reloc->addend == 0))
1347 {
1348 reloc->address += isection->output_offset;
1349 return bfd_reloc_ok;
1350 }
435b1e90 1351
252b5132
RH		 1352 /* Catch relocs involving undefined symbols. */
1353 if (bfd_is_und_section (symbol->section)
1354 && (symbol->flags & BSF_WEAK) == 0
1355 && obfd == NULL)
1356 return bfd_reloc_undefined;
1357
1358 /* We handle final linking of some relocs ourselves. */
1359
1360 /* Is the address of the relocation really within the section? */
07515404 1361 if (reloc->address > bfd_get_section_limit (abfd, isection))
252b5132 1362 return bfd_reloc_outofrange;
435b1e90 1363
4cc11e76 1364 /* Work out which section the relocation is targeted at and the
252b5132 1365 initial relocation command value. */
435b1e90 1366
b34976b6 1367 if (reloc->howto->pc_relative)
86aba9db
NC		 1368 return bfd_reloc_ok;
1369
252b5132
RH		 1370 /* Get symbol value. (Common symbols are special.) */
1371 if (bfd_is_com_section (symbol->section))
1372 relocation = 0;
1373 else
1374 relocation = symbol->value;
435b1e90 1375
252b5132
RH		 1376 /* Convert input-section-relative symbol value to absolute + addend. */
1377 relocation += symbol->section->output_section->vma;
1378 relocation += symbol->section->output_offset;
1379 relocation += reloc->addend;
435b1e90 1380
a0f2e916
NC		 1381#if 0 /* Since this reloc is going to be processed later on, we should
1382 not make it pc-relative here. To test this, try assembling and
1383 linking this program:
1384
1385 .text
1386 .globl _start
1387 nop
dc810e39 1388 _start:
a0f2e916
NC		 1389 jr foo
1390
1391 .section ".foo","ax"
1392 nop
1393 foo:
e12dd2ea 1394 nop */
82e51918 1395 if (reloc->howto->pc_relative)
252b5132
RH		 1396 {
1397 /* Here the variable relocation holds the final address of the
1398 symbol we are relocating against, plus any addend. */
1399 relocation -= isection->output_section->vma + isection->output_offset;
435b1e90 1400
e12dd2ea 1401 /* Deal with pcrel_offset. */
252b5132
RH		 1402 relocation -= reloc->address;
1403 }
a0f2e916 1404#endif
435b1e90 1405 reloc->addend = relocation;
252b5132
RH		 1406 return bfd_reloc_ok;
1407}
86aba9db
NC		 1408
1409/* This function is used for relocs which are only used
1410 for relaxing, which the linker should otherwise ignore. */
1411
1412static bfd_reloc_status_type
1413v850_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
1414 output_bfd, error_message)
b34976b6
AM		 1415 bfd *abfd ATTRIBUTE_UNUSED;
1416 arelent *reloc_entry;
1417 asymbol *symbol ATTRIBUTE_UNUSED;
1418 PTR data ATTRIBUTE_UNUSED;
1419 asection *input_section;
1420 bfd *output_bfd;
1421 char **error_message ATTRIBUTE_UNUSED;
86aba9db
NC		 1422{
1423 if (output_bfd != NULL)
1424 reloc_entry->address += input_section->output_offset;
1425
1426 return bfd_reloc_ok;
1427}
252b5132 1428\f
b34976b6 1429static bfd_boolean
252b5132 1430v850_elf_is_local_label_name (abfd, name)
b34976b6
AM		 1431 bfd *abfd ATTRIBUTE_UNUSED;
1432 const char *name;
252b5132
RH		 1433{
1434 return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
1435 || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_'));
1436}
252b5132 1437\f
5cec6941
NC		 1438/* We overload some of the bfd_reloc error codes for own purposes. */
1439#define bfd_reloc_gp_not_found bfd_reloc_other
1440#define bfd_reloc_ep_not_found bfd_reloc_continue
1441#define bfd_reloc_ctbp_not_found (bfd_reloc_dangerous + 1)
1442
252b5132 1443/* Perform a relocation as part of a final link. */
e12dd2ea 1444
252b5132
RH		 1445static bfd_reloc_status_type
1446v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
86aba9db
NC		 1447 input_section, contents, offset, value,
1448 addend, info, sym_sec, is_local)
b34976b6
AM		 1449 reloc_howto_type *howto;
1450 bfd *input_bfd;
1451 bfd *output_bfd ATTRIBUTE_UNUSED;
1452 asection *input_section;
1453 bfd_byte *contents;
1454 bfd_vma offset;
1455 bfd_vma value;
1456 bfd_vma addend;
1457 struct bfd_link_info *info;
1458 asection *sym_sec;
1459 int is_local ATTRIBUTE_UNUSED;
252b5132 1460{
b34976b6
AM		 1461 unsigned int r_type = howto->type;
1462 bfd_byte *hit_data = contents + offset;
252b5132
RH		 1463
1464 /* Adjust the value according to the relocation. */
1465 switch (r_type)
1466 {
1467 case R_V850_9_PCREL:
1468 value -= (input_section->output_section->vma
1469 + input_section->output_offset);
1470 value -= offset;
1471 break;
435b1e90 1472
252b5132
RH		 1473 case R_V850_22_PCREL:
1474 value -= (input_section->output_section->vma
1475 + input_section->output_offset
1476 + offset);
1477
232fb1a3
NC		 1478 /* If the sign extension will corrupt the value then we have overflowed. */
1479 if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000))
1480 return bfd_reloc_overflow;
435b1e90 1481
e12dd2ea
NC		 1482 /* Only the bottom 24 bits of the PC are valid */
1483 value = SEXT24 (value);
252b5132 1484 break;
435b1e90 1485
e30ddb24
NC		 1486 case R_V850_REL32:
1487 value -= (input_section->output_section->vma
1488 + input_section->output_offset
1489 + offset);
1490 break;
1491
252b5132
RH		 1492 case R_V850_HI16_S:
1493 case R_V850_HI16:
1494 case R_V850_LO16:
1495 case R_V850_16:
e30ddb24 1496 case R_V850_ABS32:
252b5132
RH		 1497 case R_V850_8:
1498 break;
1499
435b1e90 1500 case R_V850_ZDA_15_16_OFFSET:
252b5132
RH		 1501 case R_V850_ZDA_16_16_OFFSET:
1502 case R_V850_ZDA_16_16_SPLIT_OFFSET:
1503 if (sym_sec == NULL)
1504 return bfd_reloc_undefined;
435b1e90 1505
252b5132
RH		 1506 value -= sym_sec->output_section->vma;
1507 break;
1508
1509 case R_V850_SDA_15_16_OFFSET:
1510 case R_V850_SDA_16_16_OFFSET:
1511 case R_V850_SDA_16_16_SPLIT_OFFSET:
1512 {
1513 unsigned long gp;
1514 struct bfd_link_hash_entry * h;
1515
1516 if (sym_sec == NULL)
1517 return bfd_reloc_undefined;
435b1e90 1518
252b5132 1519 /* Get the value of __gp. */
b34976b6 1520 h = bfd_link_hash_lookup (info->hash, "__gp", FALSE, FALSE, TRUE);
252b5132
RH		 1521 if (h == (struct bfd_link_hash_entry *) NULL
1522 || h->type != bfd_link_hash_defined)
5cec6941 1523 return bfd_reloc_gp_not_found;
252b5132
RH		 1524
1525 gp = (h->u.def.value
1526 + h->u.def.section->output_section->vma
1527 + h->u.def.section->output_offset);
1528
1529 value -= sym_sec->output_section->vma;
1530 value -= (gp - sym_sec->output_section->vma);
1531 }
1532 break;
1533
1534 case R_V850_TDA_4_4_OFFSET:
1535 case R_V850_TDA_4_5_OFFSET:
1536 case R_V850_TDA_16_16_OFFSET:
1537 case R_V850_TDA_7_7_OFFSET:
1538 case R_V850_TDA_7_8_OFFSET:
1539 case R_V850_TDA_6_8_OFFSET:
1540 {
1541 unsigned long ep;
1542 struct bfd_link_hash_entry * h;
435b1e90 1543
252b5132 1544 /* Get the value of __ep. */
b34976b6 1545 h = bfd_link_hash_lookup (info->hash, "__ep", FALSE, FALSE, TRUE);
252b5132
RH		 1546 if (h == (struct bfd_link_hash_entry *) NULL
1547 || h->type != bfd_link_hash_defined)
5cec6941 1548 return bfd_reloc_ep_not_found;
252b5132
RH		 1549
1550 ep = (h->u.def.value
1551 + h->u.def.section->output_section->vma
1552 + h->u.def.section->output_offset);
1553
1554 value -= ep;
1555 }
1556 break;
435b1e90 1557
252b5132
RH		 1558 case R_V850_CALLT_6_7_OFFSET:
1559 {
1560 unsigned long ctbp;
1561 struct bfd_link_hash_entry * h;
435b1e90 1562
252b5132 1563 /* Get the value of __ctbp. */
b34976b6 1564 h = bfd_link_hash_lookup (info->hash, "__ctbp", FALSE, FALSE, TRUE);
252b5132
RH		 1565 if (h == (struct bfd_link_hash_entry *) NULL
1566 || h->type != bfd_link_hash_defined)
5cec6941 1567 return bfd_reloc_ctbp_not_found;
252b5132
RH		 1568
1569 ctbp = (h->u.def.value
1570 + h->u.def.section->output_section->vma
1571 + h->u.def.section->output_offset);
1572 value -= ctbp;
1573 }
1574 break;
435b1e90 1575
252b5132
RH		 1576 case R_V850_CALLT_16_16_OFFSET:
1577 {
1578 unsigned long ctbp;
1579 struct bfd_link_hash_entry * h;
1580
1581 if (sym_sec == NULL)
1582 return bfd_reloc_undefined;
435b1e90 1583
252b5132 1584 /* Get the value of __ctbp. */
b34976b6 1585 h = bfd_link_hash_lookup (info->hash, "__ctbp", FALSE, FALSE, TRUE);
252b5132
RH		 1586 if (h == (struct bfd_link_hash_entry *) NULL
1587 || h->type != bfd_link_hash_defined)
5cec6941 1588 return bfd_reloc_ctbp_not_found;
252b5132
RH		 1589
1590 ctbp = (h->u.def.value
1591 + h->u.def.section->output_section->vma
1592 + h->u.def.section->output_offset);
1593
1594 value -= sym_sec->output_section->vma;
1595 value -= (ctbp - sym_sec->output_section->vma);
1596 }
1597 break;
435b1e90 1598
252b5132
RH		 1599 case R_V850_NONE:
1600 case R_V850_GNU_VTINHERIT:
1601 case R_V850_GNU_VTENTRY:
86aba9db
NC		 1602 case R_V850_LONGCALL:
1603 case R_V850_LONGJUMP:
1604 case R_V850_ALIGN:
252b5132
RH		 1605 return bfd_reloc_ok;
1606
1607 default:
1608 return bfd_reloc_notsupported;
1609 }
1610
1611 /* Perform the relocation. */
435b1e90 1612 return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data);
252b5132 1613}
252b5132
RH		 1614\f
1615/* Relocate an V850 ELF section. */
e12dd2ea 1616
b34976b6 1617static bfd_boolean
252b5132
RH		 1618v850_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1619 contents, relocs, local_syms, local_sections)
b34976b6
AM		 1620 bfd *output_bfd;
1621 struct bfd_link_info *info;
1622 bfd *input_bfd;
1623 asection *input_section;
1624 bfd_byte *contents;
1625 Elf_Internal_Rela *relocs;
1626 Elf_Internal_Sym *local_syms;
1627 asection **local_sections;
252b5132 1628{
b34976b6
AM		 1629 Elf_Internal_Shdr *symtab_hdr;
1630 struct elf_link_hash_entry **sym_hashes;
1631 Elf_Internal_Rela *rel;
1632 Elf_Internal_Rela *relend;
252b5132 1633
1049f94e 1634 if (info->relocatable)
b34976b6 1635 return TRUE;
f0fe0e16 1636
252b5132
RH		 1637 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1638 sym_hashes = elf_sym_hashes (input_bfd);
1639
1640 if (sym_hashes == NULL)
1641 {
1642 info->callbacks->warning
dc810e39
AM		 1643 (info, "no hash table available",
1644 NULL, input_bfd, input_section, (bfd_vma) 0);
252b5132 1645
b34976b6 1646 return FALSE;
252b5132 1647 }
435b1e90 1648
252b5132
RH		 1649 /* Reset the list of remembered HI16S relocs to empty. */
1650 free_hi16s = previous_hi16s;
1651 previous_hi16s = NULL;
1652 hi16s_counter = 0;
435b1e90 1653
252b5132
RH		 1654 rel = relocs;
1655 relend = relocs + input_section->reloc_count;
1656 for (; rel < relend; rel++)
1657 {
b34976b6
AM		 1658 int r_type;
1659 reloc_howto_type *howto;
1660 unsigned long r_symndx;
1661 Elf_Internal_Sym *sym;
1662 asection *sec;
1663 struct elf_link_hash_entry *h;
1664 bfd_vma relocation;
1665 bfd_reloc_status_type r;
252b5132
RH		 1666
1667 r_symndx = ELF32_R_SYM (rel->r_info);
1668 r_type = ELF32_R_TYPE (rel->r_info);
1669
1670 if (r_type == R_V850_GNU_VTENTRY
1671 || r_type == R_V850_GNU_VTINHERIT)
1672 continue;
1673
252b5132 1674 /* This is a final link. */
f0fe0e16 1675 howto = v850_elf_howto_table + r_type;
252b5132
RH		 1676 h = NULL;
1677 sym = NULL;
1678 sec = NULL;
1679 if (r_symndx < symtab_hdr->sh_info)
1680 {
1681 sym = local_syms + r_symndx;
1682 sec = local_sections[r_symndx];
8517fae7 1683 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
252b5132
RH		 1684#if 0
1685 {
1686 char * name;
e12dd2ea 1687
252b5132
RH		 1688 name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name);
1689 name = (name == NULL) ? "<none>" : name;
e12dd2ea
NC		 1690 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
1691 sec->name, name, sym->st_name,
1692 sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend);
252b5132
RH		 1693 }
1694#endif
1695 }
1696 else
1697 {
59c2e50f 1698 bfd_boolean unresolved_reloc, warned;
435b1e90 1699
b2a8e766
AM		 1700 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1701 r_symndx, symtab_hdr, sym_hashes,
1702 h, sec, relocation,
1703 unresolved_reloc, warned);
252b5132
RH		 1704 }
1705
e12dd2ea 1706 /* FIXME: We should use the addend, but the COFF relocations don't. */
252b5132
RH		 1707 r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
1708 input_section,
1709 contents, rel->r_offset,
1710 relocation, rel->r_addend,
1711 info, sec, h == NULL);
1712
1713 if (r != bfd_reloc_ok)
1714 {
1715 const char * name;
1716 const char * msg = (const char *)0;
1717
1718 if (h != NULL)
1719 name = h->root.root.string;
1720 else
1721 {
1722 name = (bfd_elf_string_from_elf_section
1723 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1724 if (name == NULL || *name == '\0')
1725 name = bfd_section_name (input_bfd, sec);
1726 }
1727
1728 switch (r)
1729 {
1730 case bfd_reloc_overflow:
1731 if (! ((*info->callbacks->reloc_overflow)
1732 (info, name, howto->name, (bfd_vma) 0,
1733 input_bfd, input_section, rel->r_offset)))
b34976b6 1734 return FALSE;
252b5132
RH		 1735 break;
1736
1737 case bfd_reloc_undefined:
1738 if (! ((*info->callbacks->undefined_symbol)
1739 (info, name, input_bfd, input_section,
b34976b6
AM		 1740 rel->r_offset, TRUE)))
1741 return FALSE;
252b5132
RH		 1742 break;
1743
1744 case bfd_reloc_outofrange:
1745 msg = _("internal error: out of range error");
1746 goto common_error;
1747
1748 case bfd_reloc_notsupported:
1749 msg = _("internal error: unsupported relocation error");
1750 goto common_error;
1751
1752 case bfd_reloc_dangerous:
1753 msg = _("internal error: dangerous relocation");
1754 goto common_error;
1755
5cec6941 1756 case bfd_reloc_gp_not_found:
252b5132
RH		 1757 msg = _("could not locate special linker symbol __gp");
1758 goto common_error;
1759
5cec6941 1760 case bfd_reloc_ep_not_found:
252b5132
RH		 1761 msg = _("could not locate special linker symbol __ep");
1762 goto common_error;
1763
5cec6941 1764 case bfd_reloc_ctbp_not_found:
252b5132
RH		 1765 msg = _("could not locate special linker symbol __ctbp");
1766 goto common_error;
435b1e90 1767
252b5132
RH		 1768 default:
1769 msg = _("internal error: unknown error");
1770 /* fall through */
1771
1772 common_error:
1773 if (!((*info->callbacks->warning)
1774 (info, msg, name, input_bfd, input_section,
1775 rel->r_offset)))
b34976b6 1776 return FALSE;
252b5132
RH		 1777 break;
1778 }
1779 }
1780 }
1781
b34976b6 1782 return TRUE;
252b5132
RH		 1783}
1784
b34976b6 1785static bfd_boolean
252b5132 1786v850_elf_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 1787 bfd *abfd ATTRIBUTE_UNUSED;
1788 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1789 asection *sec ATTRIBUTE_UNUSED;
1790 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 1791{
e12dd2ea 1792 /* No got and plt entries for v850-elf. */
b34976b6 1793 return TRUE;
252b5132
RH		 1794}
1795
1796static asection *
1e2f5b6e
AM		 1797v850_elf_gc_mark_hook (sec, info, rel, h, sym)
1798 asection *sec;
5f771d47 1799 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 1800 Elf_Internal_Rela *rel;
1801 struct elf_link_hash_entry *h;
1802 Elf_Internal_Sym *sym;
1803{
1804 if (h != NULL)
1805 {
1806 switch (ELF32_R_TYPE (rel->r_info))
1807 {
1808 case R_V850_GNU_VTINHERIT:
1809 case R_V850_GNU_VTENTRY:
1810 break;
1811
1812 default:
1813 switch (h->root.type)
1814 {
1815 case bfd_link_hash_defined:
1816 case bfd_link_hash_defweak:
1817 return h->root.u.def.section;
1818
1819 case bfd_link_hash_common:
1820 return h->root.u.c.p->section;
e049a0de
ILT		 1821
1822 default:
1823 break;
252b5132
RH		 1824 }
1825 }
1826 }
1827 else
1e2f5b6e 1828 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
9ad5cbcf 1829
252b5132
RH		 1830 return NULL;
1831}
e12dd2ea 1832
252b5132 1833/* Set the right machine number. */
e12dd2ea 1834
b34976b6 1835static bfd_boolean
252b5132
RH		 1836v850_elf_object_p (abfd)
1837 bfd *abfd;
1838{
1839 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1840 {
1841 default:
250d94fd
AM		 1842 case E_V850_ARCH:
1843 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850);
1844 break;
1845 case E_V850E_ARCH:
1846 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e);
1847 break;
8ad30312
NC		 1848 case E_V850E1_ARCH:
1849 bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e1);
1850 break;
252b5132 1851 }
b34976b6 1852 return TRUE;
252b5132
RH		 1853}
1854
1855/* Store the machine number in the flags field. */
e12dd2ea 1856
252b5132
RH		 1857static void
1858v850_elf_final_write_processing (abfd, linker)
b34976b6
AM		 1859 bfd *abfd;
1860 bfd_boolean linker ATTRIBUTE_UNUSED;
252b5132
RH		 1861{
1862 unsigned long val;
1863
1864 switch (bfd_get_mach (abfd))
1865 {
b34976b6 1866 default:
250d94fd
AM		 1867 case bfd_mach_v850: val = E_V850_ARCH; break;
1868 case bfd_mach_v850e: val = E_V850E_ARCH; break;
8ad30312 1869 case bfd_mach_v850e1: val = E_V850E1_ARCH; break;
252b5132
RH		 1870 }
1871
1872 elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
1873 elf_elfheader (abfd)->e_flags |= val;
1874}
1875
435b1e90 1876/* Function to keep V850 specific file flags. */
e12dd2ea 1877
b34976b6 1878static bfd_boolean
252b5132 1879v850_elf_set_private_flags (abfd, flags)
b34976b6 1880 bfd *abfd;
252b5132
RH		 1881 flagword flags;
1882{
1883 BFD_ASSERT (!elf_flags_init (abfd)
1884 || elf_elfheader (abfd)->e_flags == flags);
1885
1886 elf_elfheader (abfd)->e_flags = flags;
b34976b6
AM		 1887 elf_flags_init (abfd) = TRUE;
1888 return TRUE;
252b5132
RH		 1889}
1890
e12dd2ea
NC		 1891/* Merge backend specific data from an object file
1892 to the output object file when linking. */
b34976b6 1893static bfd_boolean
252b5132 1894v850_elf_merge_private_bfd_data (ibfd, obfd)
b34976b6
AM		 1895 bfd *ibfd;
1896 bfd *obfd;
252b5132
RH		 1897{
1898 flagword out_flags;
1899 flagword in_flags;
1900
1901 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1902 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 1903 return TRUE;
252b5132
RH		 1904
1905 in_flags = elf_elfheader (ibfd)->e_flags;
1906 out_flags = elf_elfheader (obfd)->e_flags;
1907
1908 if (! elf_flags_init (obfd))
1909 {
1910 /* If the input is the default architecture then do not
1911 bother setting the flags for the output architecture,
1912 instead allow future merges to do this. If no future
1913 merges ever set these flags then they will retain their
1914 unitialised values, which surprise surprise, correspond
1915 to the default values. */
1916 if (bfd_get_arch_info (ibfd)->the_default)
b34976b6 1917 return TRUE;
435b1e90 1918
b34976b6 1919 elf_flags_init (obfd) = TRUE;
252b5132
RH		 1920 elf_elfheader (obfd)->e_flags = in_flags;
1921
1922 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1923 && bfd_get_arch_info (obfd)->the_default)
e12dd2ea 1924 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
252b5132 1925
b34976b6 1926 return TRUE;
252b5132
RH		 1927 }
1928
1929 /* Check flag compatibility. */
1930 if (in_flags == out_flags)
b34976b6 1931 return TRUE;
252b5132
RH		 1932
1933 if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH)
1934 && (in_flags & EF_V850_ARCH) != E_V850_ARCH)
8ad30312
NC		 1935 {
1936 /* Allow v850e1 binaries to be linked with v850e binaries.
1937 Set the output binary to v850e. */
1938 if ((in_flags & EF_V850_ARCH) == E_V850E1_ARCH
1939 && (out_flags & EF_V850_ARCH) == E_V850E_ARCH)
1940 return TRUE;
1941
1942 if ((in_flags & EF_V850_ARCH) == E_V850E_ARCH
1943 && (out_flags & EF_V850_ARCH) == E_V850E1_ARCH)
1944 {
1945 elf_elfheader (obfd)->e_flags =
1946 ((out_flags & ~ EF_V850_ARCH) | E_V850E_ARCH);
1947 return TRUE;
1948 }
1949
d003868e
AM		 1950 _bfd_error_handler (_("%B: Architecture mismatch with previous modules"),
1951 ibfd);
8ad30312 1952 }
252b5132 1953
b34976b6 1954 return TRUE;
252b5132 1955}
e12dd2ea
NC		 1956
1957/* Display the flags field. */
252b5132 1958
b34976b6 1959static bfd_boolean
252b5132 1960v850_elf_print_private_bfd_data (abfd, ptr)
b34976b6
AM		 1961 bfd *abfd;
1962 PTR ptr;
252b5132
RH		 1963{
1964 FILE * file = (FILE *) ptr;
435b1e90 1965
252b5132 1966 BFD_ASSERT (abfd != NULL && ptr != NULL);
435b1e90 1967
252b5132 1968 _bfd_elf_print_private_bfd_data (abfd, ptr);
435b1e90 1969
252b5132
RH		 1970 /* xgettext:c-format */
1971 fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags);
435b1e90 1972
252b5132
RH		 1973 switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
1974 {
1975 default:
1976 case E_V850_ARCH: fprintf (file, _("v850 architecture")); break;
1977 case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break;
8ad30312 1978 case E_V850E1_ARCH: fprintf (file, _("v850e1 architecture")); break;
252b5132 1979 }
435b1e90 1980
252b5132 1981 fputc ('\n', file);
435b1e90 1982
b34976b6 1983 return TRUE;
252b5132
RH		 1984}
1985
1986/* V850 ELF uses four common sections. One is the usual one, and the
1987 others are for (small) objects in one of the special data areas:
1988 small, tiny and zero. All the objects are kept together, and then
1989 referenced via the gp register, the ep register or the r0 register
1990 respectively, which yields smaller, faster assembler code. This
1991 approach is copied from elf32-mips.c. */
1992
1993static asection v850_elf_scom_section;
1994static asymbol v850_elf_scom_symbol;
1995static asymbol * v850_elf_scom_symbol_ptr;
1996static asection v850_elf_tcom_section;
1997static asymbol v850_elf_tcom_symbol;
1998static asymbol * v850_elf_tcom_symbol_ptr;
1999static asection v850_elf_zcom_section;
2000static asymbol v850_elf_zcom_symbol;
2001static asymbol * v850_elf_zcom_symbol_ptr;
2002
e12dd2ea
NC		 2003/* Given a BFD section, try to locate the
2004 corresponding ELF section index. */
252b5132 2005
b34976b6 2006static bfd_boolean
af746e92 2007v850_elf_section_from_bfd_section (abfd, sec, retval)
b34976b6
AM		 2008 bfd *abfd ATTRIBUTE_UNUSED;
2009 asection *sec;
2010 int *retval;
252b5132
RH		 2011{
2012 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
2013 *retval = SHN_V850_SCOMMON;
2014 else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0)
2015 *retval = SHN_V850_TCOMMON;
2016 else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0)
2017 *retval = SHN_V850_ZCOMMON;
2018 else
b34976b6 2019 return FALSE;
435b1e90 2020
b34976b6 2021 return TRUE;
252b5132
RH		 2022}
2023
2024/* Handle the special V850 section numbers that a symbol may use. */
2025
2026static void
2027v850_elf_symbol_processing (abfd, asym)
b34976b6
AM		 2028 bfd *abfd;
2029 asymbol *asym;
252b5132
RH		 2030{
2031 elf_symbol_type * elfsym = (elf_symbol_type *) asym;
9ad5cbcf 2032 unsigned int indx;
435b1e90 2033
9ad5cbcf 2034 indx = elfsym->internal_elf_sym.st_shndx;
252b5132
RH		 2035
2036 /* If the section index is an "ordinary" index, then it may
2037 refer to a v850 specific section created by the assembler.
2038 Check the section's type and change the index it matches.
435b1e90 2039
252b5132 2040 FIXME: Should we alter the st_shndx field as well ? */
435b1e90 2041
9ad5cbcf
AM		 2042 if (indx < elf_numsections (abfd))
2043 switch (elf_elfsections(abfd)[indx]->sh_type)
252b5132
RH		 2044 {
2045 case SHT_V850_SCOMMON:
9ad5cbcf 2046 indx = SHN_V850_SCOMMON;
252b5132 2047 break;
435b1e90 2048
252b5132 2049 case SHT_V850_TCOMMON:
9ad5cbcf 2050 indx = SHN_V850_TCOMMON;
252b5132 2051 break;
435b1e90 2052
252b5132 2053 case SHT_V850_ZCOMMON:
9ad5cbcf 2054 indx = SHN_V850_ZCOMMON;
252b5132 2055 break;
435b1e90 2056
252b5132
RH		 2057 default:
2058 break;
2059 }
435b1e90 2060
9ad5cbcf 2061 switch (indx)
252b5132
RH		 2062 {
2063 case SHN_V850_SCOMMON:
2064 if (v850_elf_scom_section.name == NULL)
2065 {
2066 /* Initialize the small common section. */
2067 v850_elf_scom_section.name = ".scommon";
2068 v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA;
2069 v850_elf_scom_section.output_section = & v850_elf_scom_section;
2070 v850_elf_scom_section.symbol = & v850_elf_scom_symbol;
2071 v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr;
2072 v850_elf_scom_symbol.name = ".scommon";
2073 v850_elf_scom_symbol.flags = BSF_SECTION_SYM;
2074 v850_elf_scom_symbol.section = & v850_elf_scom_section;
2075 v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol;
2076 }
2077 asym->section = & v850_elf_scom_section;
2078 asym->value = elfsym->internal_elf_sym.st_size;
2079 break;
435b1e90 2080
252b5132
RH		 2081 case SHN_V850_TCOMMON:
2082 if (v850_elf_tcom_section.name == NULL)
2083 {
2084 /* Initialize the tcommon section. */
2085 v850_elf_tcom_section.name = ".tcommon";
2086 v850_elf_tcom_section.flags = SEC_IS_COMMON;
2087 v850_elf_tcom_section.output_section = & v850_elf_tcom_section;
2088 v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol;
2089 v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr;
2090 v850_elf_tcom_symbol.name = ".tcommon";
2091 v850_elf_tcom_symbol.flags = BSF_SECTION_SYM;
2092 v850_elf_tcom_symbol.section = & v850_elf_tcom_section;
2093 v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol;
2094 }
2095 asym->section = & v850_elf_tcom_section;
2096 asym->value = elfsym->internal_elf_sym.st_size;
2097 break;
2098
2099 case SHN_V850_ZCOMMON:
2100 if (v850_elf_zcom_section.name == NULL)
2101 {
2102 /* Initialize the zcommon section. */
2103 v850_elf_zcom_section.name = ".zcommon";
2104 v850_elf_zcom_section.flags = SEC_IS_COMMON;
2105 v850_elf_zcom_section.output_section = & v850_elf_zcom_section;
2106 v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol;
2107 v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr;
2108 v850_elf_zcom_symbol.name = ".zcommon";
2109 v850_elf_zcom_symbol.flags = BSF_SECTION_SYM;
2110 v850_elf_zcom_symbol.section = & v850_elf_zcom_section;
2111 v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol;
2112 }
2113 asym->section = & v850_elf_zcom_section;
2114 asym->value = elfsym->internal_elf_sym.st_size;
2115 break;
2116 }
2117}
2118
2119/* Hook called by the linker routine which adds symbols from an object
2120 file. We must handle the special v850 section numbers here. */
2121
b34976b6 2122static bfd_boolean
252b5132 2123v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
b34976b6
AM		 2124 bfd *abfd;
2125 struct bfd_link_info *info ATTRIBUTE_UNUSED;
555cd476 2126 Elf_Internal_Sym *sym;
b34976b6
AM		 2127 const char **namep ATTRIBUTE_UNUSED;
2128 flagword *flagsp ATTRIBUTE_UNUSED;
2129 asection **secp;
2130 bfd_vma *valp;
252b5132 2131{
9ad5cbcf 2132 unsigned int indx = sym->st_shndx;
435b1e90 2133
252b5132
RH		 2134 /* If the section index is an "ordinary" index, then it may
2135 refer to a v850 specific section created by the assembler.
2136 Check the section's type and change the index it matches.
435b1e90 2137
252b5132 2138 FIXME: Should we alter the st_shndx field as well ? */
435b1e90 2139
9ad5cbcf
AM		 2140 if (indx < elf_numsections (abfd))
2141 switch (elf_elfsections(abfd)[indx]->sh_type)
252b5132
RH		 2142 {
2143 case SHT_V850_SCOMMON:
9ad5cbcf 2144 indx = SHN_V850_SCOMMON;
252b5132 2145 break;
435b1e90 2146
252b5132 2147 case SHT_V850_TCOMMON:
9ad5cbcf 2148 indx = SHN_V850_TCOMMON;
252b5132 2149 break;
435b1e90 2150
252b5132 2151 case SHT_V850_ZCOMMON:
9ad5cbcf 2152 indx = SHN_V850_ZCOMMON;
252b5132 2153 break;
435b1e90 2154
252b5132
RH		 2155 default:
2156 break;
2157 }
435b1e90 2158
9ad5cbcf 2159 switch (indx)
252b5132
RH		 2160 {
2161 case SHN_V850_SCOMMON:
2162 *secp = bfd_make_section_old_way (abfd, ".scommon");
2163 (*secp)->flags |= SEC_IS_COMMON;
2164 *valp = sym->st_size;
2165 break;
435b1e90 2166
252b5132
RH		 2167 case SHN_V850_TCOMMON:
2168 *secp = bfd_make_section_old_way (abfd, ".tcommon");
2169 (*secp)->flags |= SEC_IS_COMMON;
2170 *valp = sym->st_size;
2171 break;
435b1e90 2172
252b5132
RH		 2173 case SHN_V850_ZCOMMON:
2174 *secp = bfd_make_section_old_way (abfd, ".zcommon");
2175 (*secp)->flags |= SEC_IS_COMMON;
2176 *valp = sym->st_size;
2177 break;
2178 }
2179
b34976b6 2180 return TRUE;
252b5132
RH		 2181}
2182
b34976b6 2183static bfd_boolean
754021d0 2184v850_elf_link_output_symbol_hook (info, name, sym, input_sec, h)
b34976b6
AM		 2185 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2186 const char *name ATTRIBUTE_UNUSED;
2187 Elf_Internal_Sym *sym;
2188 asection *input_sec;
754021d0 2189 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED;
252b5132
RH		 2190{
2191 /* If we see a common symbol, which implies a relocatable link, then
2192 if a symbol was in a special common section in an input file, mark
2193 it as a special common in the output file. */
435b1e90 2194
252b5132
RH		 2195 if (sym->st_shndx == SHN_COMMON)
2196 {
2197 if (strcmp (input_sec->name, ".scommon") == 0)
2198 sym->st_shndx = SHN_V850_SCOMMON;
2199 else if (strcmp (input_sec->name, ".tcommon") == 0)
2200 sym->st_shndx = SHN_V850_TCOMMON;
2201 else if (strcmp (input_sec->name, ".zcommon") == 0)
2202 sym->st_shndx = SHN_V850_ZCOMMON;
2203 }
2204
b34976b6 2205 return TRUE;
252b5132
RH		 2206}
2207
b34976b6 2208static bfd_boolean
252b5132 2209v850_elf_section_from_shdr (abfd, hdr, name)
b34976b6
AM		 2210 bfd *abfd;
2211 Elf_Internal_Shdr *hdr;
2212 const char *name;
252b5132
RH		 2213{
2214 /* There ought to be a place to keep ELF backend specific flags, but
2215 at the moment there isn't one. We just keep track of the
2216 sections by their name, instead. */
2217
2218 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
b34976b6 2219 return FALSE;
252b5132
RH		 2220
2221 switch (hdr->sh_type)
2222 {
2223 case SHT_V850_SCOMMON:
2224 case SHT_V850_TCOMMON:
2225 case SHT_V850_ZCOMMON:
2226 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2227 (bfd_get_section_flags (abfd,
2228 hdr->bfd_section)
2229 | SEC_IS_COMMON)))
b34976b6 2230 return FALSE;
252b5132
RH		 2231 }
2232
b34976b6 2233 return TRUE;
252b5132
RH		 2234}
2235
e12dd2ea
NC		 2236/* Set the correct type for a V850 ELF section. We do this
2237 by the section name, which is a hack, but ought to work. */
2238
b34976b6 2239static bfd_boolean
252b5132 2240v850_elf_fake_sections (abfd, hdr, sec)
b34976b6
AM		 2241 bfd *abfd ATTRIBUTE_UNUSED;
2242 Elf_Internal_Shdr *hdr;
2243 asection *sec;
252b5132
RH		 2244{
2245 register const char * name;
2246
2247 name = bfd_get_section_name (abfd, sec);
2248
2249 if (strcmp (name, ".scommon") == 0)
2250 {
2251 hdr->sh_type = SHT_V850_SCOMMON;
2252 }
2253 else if (strcmp (name, ".tcommon") == 0)
2254 {
2255 hdr->sh_type = SHT_V850_TCOMMON;
2256 }
2257 else if (strcmp (name, ".zcommon") == 0)
2258 hdr->sh_type = SHT_V850_ZCOMMON;
435b1e90 2259
b34976b6 2260 return TRUE;
252b5132 2261}
86aba9db
NC		 2262
2263/* Delete some bytes from a section while relaxing. */
2264
b34976b6 2265static bfd_boolean
86aba9db 2266v850_elf_relax_delete_bytes (abfd, sec, addr, toaddr, count)
b34976b6
AM		 2267 bfd *abfd;
2268 asection *sec;
2269 bfd_vma addr;
2270 bfd_vma toaddr;
2271 int count;
86aba9db 2272{
b34976b6
AM		 2273 Elf_Internal_Shdr *symtab_hdr;
2274 Elf32_External_Sym *extsyms;
2275 Elf32_External_Sym *esym;
2276 Elf32_External_Sym *esymend;
2277 int index;
2278 unsigned int sec_shndx;
2279 bfd_byte *contents;
2280 Elf_Internal_Rela *irel;
2281 Elf_Internal_Rela *irelend;
2282 struct elf_link_hash_entry *sym_hash;
2283 Elf_Internal_Shdr *shndx_hdr;
2284 Elf_External_Sym_Shndx *shndx;
86aba9db
NC		 2285
2286 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2287 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
2288
2289 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2290
2291 contents = elf_section_data (sec)->this_hdr.contents;
2292
2293 /* The deletion must stop at the next ALIGN reloc for an alignment
2294 power larger than the number of bytes we are deleting. */
2295
2296 /* Actually delete the bytes. */
2297#if (DEBUG_RELAX & 2)
2298 fprintf (stderr, "relax_delete: contents: sec: %s %p .. %p %x\n",
2299 sec->name, addr, toaddr, count );
2300#endif
2301 memmove (contents + addr, contents + addr + count,
2302 toaddr - addr - count);
2303 memset (contents + toaddr-count, 0, count);
2304
2305 /* Adjust all the relocs. */
2306 irel = elf_section_data (sec)->relocs;
2307 irelend = irel + sec->reloc_count;
2308 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
2309 shndx = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
2310
2311 for (; irel < irelend; irel++)
2312 {
2313 bfd_vma raddr, paddr, symval;
2314 Elf_Internal_Sym isym;
2315
2316 /* Get the new reloc address. */
2317 raddr = irel->r_offset;
2318 if ((raddr >= (addr + count) && raddr < toaddr))
b34976b6 2319 irel->r_offset -= count;
86aba9db
NC		 2320
2321 if (raddr >= addr && raddr < addr + count)
2322 {
2323 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2324 (int) R_V850_NONE);
2325 continue;
2326 }
b34976b6 2327
86aba9db
NC		 2328 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN)
2329 continue;
2330
2331 bfd_elf32_swap_symbol_in (abfd,
2332 extsyms + ELF32_R_SYM (irel->r_info),
2333 shndx ? shndx + ELF32_R_SYM (irel->r_info) : NULL,
2334 & isym);
b34976b6 2335
86aba9db
NC		 2336 if (isym.st_shndx != sec_shndx)
2337 continue;
2338
2339 /* Get the value of the symbol referred to by the reloc. */
2340 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2341 {
2342 symval = isym.st_value;
2343#if (DEBUG_RELAX & 2)
2344 {
2345 char * name = bfd_elf_string_from_elf_section
2346 (abfd, symtab_hdr->sh_link, isym.st_name);
2347 fprintf (stderr,
2348 "relax_delete: local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
2349 sec->name, name, isym.st_name,
2350 sec->output_section->vma, sec->output_offset,
2351 isym.st_value, irel->r_addend);
2352 }
2353#endif
2354 }
2355 else
2356 {
2357 unsigned long indx;
2358 struct elf_link_hash_entry * h;
2359
2360 /* An external symbol. */
2361 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2362
2363 h = elf_sym_hashes (abfd) [indx];
2364 BFD_ASSERT (h != NULL);
2365
2366 symval = h->root.u.def.value;
2367#if (DEBUG_RELAX & 2)
2368 fprintf (stderr,
2369 "relax_delete: defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n",
2370 sec->name, h->root.root.string, h->root.u.def.value,
2371 sec->output_section->vma, sec->output_offset, irel->r_addend);
2372#endif
2373 }
b34976b6 2374
86aba9db 2375 paddr = symval + irel->r_addend;
b34976b6 2376
86aba9db
NC		 2377 if ( (symval >= addr + count && symval < toaddr)
2378 && (paddr < addr + count || paddr >= toaddr))
2379 irel->r_addend += count;
2380 else if ( (symval < addr + count || symval >= toaddr)
2381 && (paddr >= addr + count && paddr < toaddr))
2382 irel->r_addend -= count;
2383 }
2384
2385 /* Adjust the local symbols defined in this section. */
2386 esym = extsyms;
2387 esymend = esym + symtab_hdr->sh_info;
2388
2389 for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
2390 {
2391 Elf_Internal_Sym isym;
2392
2393 bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym);
2394
2395 if (isym.st_shndx == sec_shndx
2396 && isym.st_value >= addr + count
2397 && isym.st_value < toaddr)
2398 {
2399 isym.st_value -= count;
2400
2401 if (isym.st_value + isym.st_size >= toaddr)
b34976b6
AM		 2402 isym.st_size += count;
2403
63a23799 2404 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
86aba9db
NC		 2405 }
2406 else if (isym.st_shndx == sec_shndx
2407 && isym.st_value < addr + count)
2408 {
2409 if (isym.st_value+isym.st_size >= addr + count
2410 && isym.st_value+isym.st_size < toaddr)
2411 isym.st_size -= count;
2412
2413 if (isym.st_value >= addr
2414 && isym.st_value < addr + count)
2415 isym.st_value = addr;
2416
63a23799 2417 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
86aba9db
NC		 2418 }
2419 }
2420
2421 /* Now adjust the global symbols defined in this section. */
2422 esym = extsyms + symtab_hdr->sh_info;
2423 esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
2424
2425 for (index = 0; esym < esymend; esym ++, index ++)
2426 {
2427 Elf_Internal_Sym isym;
2428
2429 bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym);
2430 sym_hash = elf_sym_hashes (abfd) [index];
2431
2432 if (isym.st_shndx == sec_shndx
2433 && ((sym_hash)->root.type == bfd_link_hash_defined
2434 || (sym_hash)->root.type == bfd_link_hash_defweak)
2435 && (sym_hash)->root.u.def.section == sec
2436 && (sym_hash)->root.u.def.value >= addr + count
2437 && (sym_hash)->root.u.def.value < toaddr)
2438 {
2439 if ((sym_hash)->root.u.def.value + isym.st_size >= toaddr)
2440 {
2441 isym.st_size += count;
63a23799 2442 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
86aba9db
NC		 2443 }
2444
2445 (sym_hash)->root.u.def.value -= count;
2446 }
2447 else if (isym.st_shndx == sec_shndx
2448 && ((sym_hash)->root.type == bfd_link_hash_defined
2449 || (sym_hash)->root.type == bfd_link_hash_defweak)
2450 && (sym_hash)->root.u.def.section == sec
2451 && (sym_hash)->root.u.def.value < addr + count)
2452 {
2453 if ((sym_hash)->root.u.def.value+isym.st_size >= addr + count
2454 && (sym_hash)->root.u.def.value+isym.st_size < toaddr)
2455 isym.st_size -= count;
2456
2457 if ((sym_hash)->root.u.def.value >= addr
2458 && (sym_hash)->root.u.def.value < addr + count)
2459 (sym_hash)->root.u.def.value = addr;
2460
63a23799 2461 bfd_elf32_swap_symbol_out (abfd, & isym, esym, shndx);
86aba9db
NC		 2462 }
2463
2464 if (shndx)
2465 ++ shndx;
2466 }
2467
b34976b6 2468 return TRUE;
86aba9db
NC		 2469}
2470
2471#define NOP_OPCODE (0x0000)
b34976b6 2472#define MOVHI 0x0640 /* 4byte */
86aba9db 2473#define MOVHI_MASK 0x07e0
b34976b6 2474#define MOVHI_R1(insn) ((insn) & 0x1f) /* 4byte */
86aba9db
NC		 2475#define MOVHI_R2(insn) ((insn) >> 11)
2476#define MOVEA 0x0620 /* 2byte */
2477#define MOVEA_MASK 0x07e0
2478#define MOVEA_R1(insn) ((insn) & 0x1f)
2479#define MOVEA_R2(insn) ((insn) >> 11)
2480#define JARL_4 0x00040780 /* 4byte */
2481#define JARL_4_MASK 0xFFFF07FF
2482#define JARL_R2(insn) (int)(((insn) & (~JARL_4_MASK)) >> 11)
2483#define ADD_I 0x0240 /* 2byte */
2484#define ADD_I_MASK 0x07e0
2485#define ADD_I5(insn) ((((insn) & 0x001f) << 11) >> 11) /* 2byte */
2486#define ADD_R2(insn) ((insn) >> 11)
2487#define JMP_R 0x0060 /* 2byte */
2488#define JMP_R_MASK 0xFFE0
2489#define JMP_R1(insn) ((insn) & 0x1f)
2490
b34976b6 2491static bfd_boolean
86aba9db 2492v850_elf_relax_section (abfd, sec, link_info, again)
b34976b6
AM		 2493 bfd *abfd;
2494 asection *sec;
2495 struct bfd_link_info *link_info;
2496 bfd_boolean *again;
86aba9db 2497{
b34976b6
AM		 2498 Elf_Internal_Shdr *symtab_hdr;
2499 Elf_Internal_Rela *internal_relocs;
2500 Elf_Internal_Rela *irel;
2501 Elf_Internal_Rela *irelend;
2502 Elf_Internal_Rela *irelalign = NULL;
2503 Elf_Internal_Sym *isymbuf = NULL;
2504 bfd_byte *contents = NULL;
2505 bfd_vma addr = 0;
2506 bfd_vma toaddr;
2507 int align_pad_size = 0;
2508 bfd_boolean result = TRUE;
2509
2510 *again = FALSE;
86aba9db 2511
1049f94e 2512 if (link_info->relocatable
86aba9db
NC		 2513 || (sec->flags & SEC_RELOC) == 0
2514 || sec->reloc_count == 0)
b34976b6 2515 return TRUE;
86aba9db 2516
86aba9db
NC		 2517 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2518
45d6a902 2519 internal_relocs = (_bfd_elf_link_read_relocs
86aba9db
NC		 2520 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2521 link_info->keep_memory));
2522 if (internal_relocs == NULL)
2523 goto error_return;
86aba9db
NC		 2524
2525 irelend = internal_relocs + sec->reloc_count;
b34976b6 2526
eea6121a 2527 while (addr < sec->size)
86aba9db 2528 {
eea6121a 2529 toaddr = sec->size;
86aba9db
NC		 2530
2531 for (irel = internal_relocs; irel < irelend; irel ++)
2532 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN
2533 && irel->r_offset > addr
2534 && irel->r_offset < toaddr)
2535 toaddr = irel->r_offset;
b34976b6 2536
86aba9db
NC		 2537#ifdef DEBUG_RELAX
2538 fprintf (stderr, "relax region 0x%x to 0x%x align pad %d\n",
2539 addr, toaddr, align_pad_size);
2540#endif
2541 if (irelalign)
2542 {
2543 bfd_vma alignto;
2544 bfd_vma alignmoveto;
2545
2546 alignmoveto = BFD_ALIGN (addr - align_pad_size, 1 << irelalign->r_addend);
2547 alignto = BFD_ALIGN (addr, 1 << irelalign->r_addend);
2548
2549 if (alignmoveto < alignto)
2550 {
2551 unsigned int i;
2552
2553 align_pad_size = alignto - alignmoveto;
2554#ifdef DEBUG_RELAX
2555 fprintf (stderr, "relax move region 0x%x to 0x%x delete size 0x%x\n",
2556 alignmoveto, toaddr, align_pad_size);
2557#endif
2558 if (!v850_elf_relax_delete_bytes (abfd, sec, alignmoveto,
2559 toaddr, align_pad_size))
b34976b6 2560 goto error_return;
86aba9db
NC		 2561
2562 for (i = BFD_ALIGN (toaddr - align_pad_size, 1);
2563 (i + 1) < toaddr; i += 2)
2564 bfd_put_16 (abfd, NOP_OPCODE, contents + i);
2565
2566 addr = alignmoveto;
2567 }
2568 else
2569 align_pad_size = 0;
2570 }
2571
2572 for (irel = internal_relocs; irel < irelend; irel++)
2573 {
b34976b6
AM		 2574 bfd_vma laddr;
2575 bfd_vma addend;
2576 bfd_vma symval;
2577 int insn[5];
2578 int no_match = -1;
2579 Elf_Internal_Rela *hi_irelfn;
2580 Elf_Internal_Rela *lo_irelfn;
2581 Elf_Internal_Rela *irelcall;
2582 bfd_signed_vma foff;
86aba9db
NC		 2583
2584 if (! (irel->r_offset >= addr && irel->r_offset < toaddr
2585 && (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL
2586 || ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP)))
2587 continue;
2588
2589#ifdef DEBUG_RELAX
2590 fprintf (stderr, "relax check r_info 0x%x r_offset 0x%x r_addend 0x%x\n",
2591 irel->r_info,
2592 irel->r_offset,
2593 irel->r_addend );
2594#endif
2595
2596 /* Get the section contents. */
2597 if (contents == NULL)
2598 {
2599 if (elf_section_data (sec)->this_hdr.contents != NULL)
2600 contents = elf_section_data (sec)->this_hdr.contents;
2601 else
2602 {
eea6121a 2603 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
86aba9db
NC		 2604 goto error_return;
2605 }
2606 }
2607
5cec6941
NC		 2608 /* Read this BFD's local symbols if we haven't done so already. */
2609 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
86aba9db 2610 {
5cec6941
NC		 2611 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2612 if (isymbuf == NULL)
2613 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2614 symtab_hdr->sh_info, 0,
2615 NULL, NULL, NULL);
2616 if (isymbuf == NULL)
2617 goto error_return;
86aba9db
NC		 2618 }
2619
2620 laddr = irel->r_offset;
2621
2622 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL)
2623 {
2624 /* Check code for -mlong-calls output. */
eea6121a 2625 if (laddr + 16 <= (bfd_vma) sec->size)
86aba9db
NC		 2626 {
2627 insn[0] = bfd_get_16 (abfd, contents + laddr);
2628 insn[1] = bfd_get_16 (abfd, contents + laddr + 4);
2629 insn[2] = bfd_get_32 (abfd, contents + laddr + 8);
2630 insn[3] = bfd_get_16 (abfd, contents + laddr + 12);
2631 insn[4] = bfd_get_16 (abfd, contents + laddr + 14);
b34976b6 2632
86aba9db
NC		 2633 if ((insn[0] & MOVHI_MASK) != MOVHI
2634 || MOVHI_R1 (insn[0]) != 0)
2635 no_match = 0;
2636
2637 if (no_match < 0
2638 && ((insn[1] & MOVEA_MASK) != MOVEA
2639 || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1])))
2640 no_match = 1;
2641
2642 if (no_match < 0
2643 && (insn[2] & JARL_4_MASK) != JARL_4)
2644 no_match = 2;
2645
2646 if (no_match < 0
2647 && ((insn[3] & ADD_I_MASK) != ADD_I
2648 || ADD_I5 (insn[3]) != 4
2649 || JARL_R2 (insn[2]) != ADD_R2 (insn[3])))
2650 no_match = 3;
2651
2652 if (no_match < 0
2653 && ((insn[4] & JMP_R_MASK) != JMP_R
2654 || MOVEA_R2 (insn[1]) != JMP_R1 (insn[4])))
2655 no_match = 4;
2656 }
2657 else
2658 {
2659 ((*_bfd_error_handler)
2660 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insns",
2661 bfd_get_filename (abfd), (unsigned long) irel->r_offset));
2662
2663 continue;
2664 }
2665
2666 if (no_match >= 0)
2667 {
2668 ((*_bfd_error_handler)
2669 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insn 0x%x",
2670 bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match]));
2671
2672 continue;
b34976b6 2673 }
86aba9db
NC		 2674
2675 /* Get the reloc for the address from which the register is
2676 being loaded. This reloc will tell us which function is
2677 actually being called. */
2678 for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++)
2679 if (hi_irelfn->r_offset == laddr + 2
b34976b6 2680 && ELF32_R_TYPE (hi_irelfn->r_info)
86aba9db
NC		 2681 == (int) R_V850_HI16_S)
2682 break;
2683
2684 for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++)
2685 if (lo_irelfn->r_offset == laddr + 6
2686 && ELF32_R_TYPE (lo_irelfn->r_info)
2687 == (int) R_V850_LO16)
2688 break;
2689
2690 for (irelcall = internal_relocs; irelcall < irelend; irelcall ++)
2691 if (irelcall->r_offset == laddr + 8
2692 && ELF32_R_TYPE (irelcall->r_info)
2693 == (int) R_V850_22_PCREL)
2694 break;
2695
2696 if ( hi_irelfn == irelend
2697 || lo_irelfn == irelend
2698 || irelcall == irelend)
2699 {
2700 ((*_bfd_error_handler)
2701 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc",
2702 bfd_get_filename (abfd), (unsigned long) irel->r_offset ));
2703
2704 continue;
2705 }
b34976b6 2706
86aba9db
NC		 2707 if (ELF32_R_SYM (irelcall->r_info) < symtab_hdr->sh_info)
2708 {
5cec6941 2709 Elf_Internal_Sym * isym;
86aba9db
NC		 2710
2711 /* A local symbol. */
5cec6941 2712 isym = isymbuf + ELF32_R_SYM (irelcall->r_info);
86aba9db 2713
5cec6941 2714 symval = isym->st_value;
86aba9db
NC		 2715 }
2716 else
2717 {
2718 unsigned long indx;
2719 struct elf_link_hash_entry * h;
2720
2721 /* An external symbol. */
2722 indx = ELF32_R_SYM (irelcall->r_info) - symtab_hdr->sh_info;
2723 h = elf_sym_hashes (abfd)[indx];
2724 BFD_ASSERT (h != NULL);
2725
2726 if ( h->root.type != bfd_link_hash_defined
2727 && h->root.type != bfd_link_hash_defweak)
2728 /* This appears to be a reference to an undefined
2729 symbol. Just ignore it--it will be caught by the
2730 regular reloc processing. */
2731 continue;
2732
2733 symval = h->root.u.def.value;
2734 }
2735
2736 if (symval + irelcall->r_addend != irelcall->r_offset + 4)
2737 {
2738 ((*_bfd_error_handler)
2739 ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc 0x%lx",
2740 bfd_get_filename (abfd), (unsigned long) irel->r_offset, irelcall->r_offset ));
2741
2742 continue;
2743 }
2744
2745 /* Get the value of the symbol referred to by the reloc. */
2746 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2747 {
b34976b6
AM		 2748 Elf_Internal_Sym *isym;
2749 asection *sym_sec;
86aba9db
NC		 2750
2751 /* A local symbol. */
5cec6941 2752 isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info);
b34976b6 2753
5cec6941 2754 if (isym->st_shndx == SHN_UNDEF)
86aba9db 2755 sym_sec = bfd_und_section_ptr;
5cec6941 2756 else if (isym->st_shndx == SHN_ABS)
86aba9db 2757 sym_sec = bfd_abs_section_ptr;
5cec6941 2758 else if (isym->st_shndx == SHN_COMMON)
86aba9db
NC		 2759 sym_sec = bfd_com_section_ptr;
2760 else
5cec6941
NC		 2761 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2762 symval = (isym->st_value
86aba9db
NC		 2763 + sym_sec->output_section->vma
2764 + sym_sec->output_offset);
2765 }
2766 else
2767 {
2768 unsigned long indx;
b34976b6 2769 struct elf_link_hash_entry *h;
86aba9db
NC		 2770
2771 /* An external symbol. */
5cec6941 2772 indx = ELF32_R_SYM (hi_irelfn->r_info) - symtab_hdr->sh_info;
86aba9db
NC		 2773 h = elf_sym_hashes (abfd)[indx];
2774 BFD_ASSERT (h != NULL);
2775
2776 if ( h->root.type != bfd_link_hash_defined
2777 && h->root.type != bfd_link_hash_defweak)
2778 /* This appears to be a reference to an undefined
2779 symbol. Just ignore it--it will be caught by the
2780 regular reloc processing. */
2781 continue;
2782
2783 symval = (h->root.u.def.value
2784 + h->root.u.def.section->output_section->vma
2785 + h->root.u.def.section->output_offset);
2786 }
2787
2788 addend = irel->r_addend;
2789
2790 foff = (symval + addend
2791 - (irel->r_offset
2792 + sec->output_section->vma
2793 + sec->output_offset
2794 + 4));
2795#ifdef DEBUG_RELAX
2796 fprintf (stderr, "relax longcall r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n",
2797 irel->r_offset,
2798 (irel->r_offset
2799 + sec->output_section->vma
2800 + sec->output_offset),
2801 symval, addend, foff);
2802#endif
2803
2804 if (foff < -0x100000 || foff >= 0x100000)
2805 /* After all that work, we can't shorten this function call. */
2806 continue;
2807
2808 /* For simplicity of coding, we are going to modify the section
2809 contents, the section relocs, and the BFD symbol table. We
2810 must tell the rest of the code not to free up this
2811 information. It would be possible to instead create a table
2812 of changes which have to be made, as is done in coff-mips.c;
2813 that would be more work, but would require less memory when
2814 the linker is run. */
2815 elf_section_data (sec)->relocs = internal_relocs;
86aba9db 2816 elf_section_data (sec)->this_hdr.contents = contents;
5cec6941 2817 symtab_hdr->contents = (bfd_byte *) isymbuf;
b34976b6 2818
86aba9db
NC		 2819 /* Replace the long call with a jarl. */
2820 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_22_PCREL);
2821
2822 addend = 0;
2823
2824 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2825 /* If this needs to be changed because of future relaxing,
2826 it will be handled here like other internal IND12W
2827 relocs. */
2828 bfd_put_32 (abfd,
2829 0x00000780 | (JARL_R2 (insn[2])<<11) | ((addend << 16) & 0xffff) | ((addend >> 16) & 0xf),
2830 contents + irel->r_offset);
2831 else
2832 /* We can't fully resolve this yet, because the external
2833 symbol value may be changed by future relaxing.
2834 We let the final link phase handle it. */
2835 bfd_put_32 (abfd, 0x00000780 | (JARL_R2 (insn[2])<<11),
2836 contents + irel->r_offset);
2837
b34976b6 2838 hi_irelfn->r_info =
86aba9db
NC		 2839 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
2840 lo_irelfn->r_info =
2841 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
2842 irelcall->r_info =
2843 ELF32_R_INFO (ELF32_R_SYM (irelcall->r_info), R_V850_NONE);
2844
2845 if (! v850_elf_relax_delete_bytes (abfd, sec,
2846 irel->r_offset + 4, toaddr, 12))
2847 goto error_return;
2848
2849 align_pad_size += 12;
2850 }
2851 else if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP)
2852 {
2853 /* Check code for -mlong-jumps output. */
eea6121a 2854 if (laddr + 10 <= (bfd_vma) sec->size)
86aba9db
NC		 2855 {
2856 insn[0] = bfd_get_16 (abfd, contents + laddr);
2857 insn[1] = bfd_get_16 (abfd, contents + laddr + 4);
2858 insn[2] = bfd_get_16 (abfd, contents + laddr + 8);
2859
2860 if ((insn[0] & MOVHI_MASK) != MOVHI
2861 || MOVHI_R1 (insn[0]) != 0)
2862 no_match = 0;
2863
2864 if (no_match < 0
2865 && ((insn[1] & MOVEA_MASK) != MOVEA
2866 || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1])))
2867 no_match = 1;
2868
2869 if (no_match < 0
2870 && ((insn[2] & JMP_R_MASK) != JMP_R
2871 || MOVEA_R2 (insn[1]) != JMP_R1 (insn[2])))
2872 no_match = 4;
2873 }
2874 else
2875 {
2876 ((*_bfd_error_handler)
2877 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insns",
2878 bfd_get_filename (abfd), (unsigned long) irel->r_offset));
2879
2880 continue;
2881 }
2882
2883 if (no_match >= 0)
2884 {
2885 ((*_bfd_error_handler)
2886 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insn 0x%x",
2887 bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match]));
2888
2889 continue;
2890 }
2891
2892 /* Get the reloc for the address from which the register is
2893 being loaded. This reloc will tell us which function is
2894 actually being called. */
2895 for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++)
2896 if (hi_irelfn->r_offset == laddr + 2
b34976b6 2897 && ELF32_R_TYPE (hi_irelfn->r_info) == (int) R_V850_HI16_S)
86aba9db
NC		 2898 break;
2899
2900 for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++)
2901 if (lo_irelfn->r_offset == laddr + 6
2902 && ELF32_R_TYPE (lo_irelfn->r_info) == (int) R_V850_LO16)
2903 break;
2904
2905 if ( hi_irelfn == irelend
2906 || lo_irelfn == irelend)
2907 {
2908 ((*_bfd_error_handler)
2909 ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized reloc",
2910 bfd_get_filename (abfd), (unsigned long) irel->r_offset ));
2911
2912 continue;
2913 }
b34976b6 2914
86aba9db
NC		 2915 /* Get the value of the symbol referred to by the reloc. */
2916 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
2917 {
5cec6941
NC		 2918 Elf_Internal_Sym * isym;
2919 asection * sym_sec;
86aba9db
NC		 2920
2921 /* A local symbol. */
5cec6941
NC		 2922 isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info);
2923
2924 if (isym->st_shndx == SHN_UNDEF)
86aba9db 2925 sym_sec = bfd_und_section_ptr;
5cec6941 2926 else if (isym->st_shndx == SHN_ABS)
86aba9db 2927 sym_sec = bfd_abs_section_ptr;
5cec6941 2928 else if (isym->st_shndx == SHN_COMMON)
86aba9db
NC		 2929 sym_sec = bfd_com_section_ptr;
2930 else
5cec6941
NC		 2931 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2932 symval = (isym->st_value
86aba9db
NC		 2933 + sym_sec->output_section->vma
2934 + sym_sec->output_offset);
2935#ifdef DEBUG_RELAX
2936 {
2937 char * name = bfd_elf_string_from_elf_section
5cec6941 2938 (abfd, symtab_hdr->sh_link, isym->st_name);
86aba9db
NC		 2939
2940 fprintf (stderr, "relax long jump local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
5cec6941
NC		 2941 sym_sec->name, name, isym->st_name,
2942 sym_sec->output_section->vma,
2943 sym_sec->output_offset,
2944 isym->st_value, irel->r_addend);
86aba9db
NC		 2945 }
2946#endif
2947 }
2948 else
2949 {
2950 unsigned long indx;
2951 struct elf_link_hash_entry * h;
2952
2953 /* An external symbol. */
2954 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2955 h = elf_sym_hashes (abfd)[indx];
2956 BFD_ASSERT (h != NULL);
2957
2958 if ( h->root.type != bfd_link_hash_defined
2959 && h->root.type != bfd_link_hash_defweak)
2960 /* This appears to be a reference to an undefined
2961 symbol. Just ignore it--it will be caught by the
2962 regular reloc processing. */
2963 continue;
2964
2965 symval = (h->root.u.def.value
2966 + h->root.u.def.section->output_section->vma
2967 + h->root.u.def.section->output_offset);
2968#ifdef DEBUG_RELAX
2969 fprintf (stderr,
2970 "relax longjump defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n",
2971 sec->name, h->root.root.string, h->root.u.def.value,
2972 sec->output_section->vma, sec->output_offset, irel->r_addend);
2973#endif
2974 }
2975
2976 addend = irel->r_addend;
2977
2978 foff = (symval + addend
2979 - (irel->r_offset
2980 + sec->output_section->vma
2981 + sec->output_offset
2982 + 4));
2983#ifdef DEBUG_RELAX
2984 fprintf (stderr, "relax longjump r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n",
2985 irel->r_offset,
2986 (irel->r_offset
2987 + sec->output_section->vma
2988 + sec->output_offset),
2989 symval, addend, foff);
2990#endif
2991 if (foff < -0x100000 || foff >= 0x100000)
2992 /* After all that work, we can't shorten this function call. */
2993 continue;
2994
2995 /* For simplicity of coding, we are going to modify the section
2996 contents, the section relocs, and the BFD symbol table. We
2997 must tell the rest of the code not to free up this
2998 information. It would be possible to instead create a table
2999 of changes which have to be made, as is done in coff-mips.c;
3000 that would be more work, but would require less memory when
3001 the linker is run. */
3002 elf_section_data (sec)->relocs = internal_relocs;
86aba9db 3003 elf_section_data (sec)->this_hdr.contents = contents;
5cec6941 3004 symtab_hdr->contents = (bfd_byte *) isymbuf;
86aba9db
NC		 3005
3006 if (foff < -0x100 || foff >= 0x100)
3007 {
3008 /* Replace the long jump with a jr. */
3009
3010 irel->r_info =
b34976b6
AM		 3011 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_22_PCREL);
3012
86aba9db
NC		 3013 irel->r_addend = addend;
3014 addend = 0;
3015
3016 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
3017 /* If this needs to be changed because of future relaxing,
3018 it will be handled here like other internal IND12W
3019 relocs. */
3020 bfd_put_32 (abfd,
3021 0x00000780 | ((addend << 15) & 0xffff0000) | ((addend >> 17) & 0xf),
3022 contents + irel->r_offset);
3023 else
3024 /* We can't fully resolve this yet, because the external
3025 symbol value may be changed by future relaxing.
3026 We let the final link phase handle it. */
3027 bfd_put_32 (abfd, 0x00000780, contents + irel->r_offset);
3028
3029 hi_irelfn->r_info =
3030 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
3031 lo_irelfn->r_info =
3032 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
3033 if (!v850_elf_relax_delete_bytes (abfd, sec,
3034 irel->r_offset + 4, toaddr, 6))
3035 goto error_return;
3036
3037 align_pad_size += 6;
3038 }
3039 else
3040 {
3041 /* Replace the long jump with a br. */
3042
3043 irel->r_info =
3044 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_9_PCREL);
3045
3046 irel->r_addend = addend;
3047 addend = 0;
3048
3049 if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info)
3050 /* If this needs to be changed because of future relaxing,
3051 it will be handled here like other internal IND12W
3052 relocs. */
3053 bfd_put_16 (abfd,
3054 0x0585 | ((addend << 10) & 0xf800) | ((addend << 3) & 0x0070),
3055 contents + irel->r_offset);
3056 else
3057 /* We can't fully resolve this yet, because the external
3058 symbol value may be changed by future relaxing.
3059 We let the final link phase handle it. */
3060 bfd_put_16 (abfd, 0x0585, contents + irel->r_offset);
3061
3062 hi_irelfn->r_info =
3063 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE);
3064 lo_irelfn->r_info =
3065 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE);
3066 if (!v850_elf_relax_delete_bytes (abfd, sec,
3067 irel->r_offset + 2, toaddr, 8))
3068 goto error_return;
3069
3070 align_pad_size += 8;
3071 }
3072 }
3073 }
3074
3075 irelalign = NULL;
3076 for (irel = internal_relocs; irel < irelend; irel++)
3077 {
3078 if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN
3079 && irel->r_offset == toaddr)
3080 {
3081 irel->r_offset -= align_pad_size;
3082
3083 if (irelalign == NULL || irelalign->r_addend > irel->r_addend)
3084 irelalign = irel;
3085 }
3086 }
3087
3088 addr = toaddr;
3089 }
3090
3091 if (!irelalign)
3092 {
3093#ifdef DEBUG_RELAX
3094 fprintf (stderr, "relax pad %d shorten %d -> %d\n",
3095 align_pad_size,
eea6121a
AM		 3096 sec->size,
3097 sec->size - align_pad_size);
86aba9db 3098#endif
eea6121a 3099 sec->size -= align_pad_size;
86aba9db
NC		 3100 }
3101
5cec6941
NC		 3102 finish:
3103 if (internal_relocs != NULL
3104 && elf_section_data (sec)->relocs != internal_relocs)
3105 free (internal_relocs);
86aba9db 3106
5cec6941
NC		 3107 if (contents != NULL
3108 && elf_section_data (sec)->this_hdr.contents != (unsigned char *) contents)
3109 free (contents);
86aba9db 3110
5cec6941
NC		 3111 if (isymbuf != NULL
3112 && symtab_hdr->contents != (bfd_byte *) isymbuf)
3113 free (isymbuf);
86aba9db 3114
5cec6941 3115 return result;
86aba9db 3116
5cec6941 3117 error_return:
b34976b6 3118 result = FALSE;
5cec6941 3119 goto finish;
86aba9db 3120}
2f89ff8d
L		 3121
3122static struct bfd_elf_special_section const v850_elf_special_sections[]=
3123{
7dcb9820
AM		 3124 { ".sdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3125 + SHF_V850_GPREL) },
3126 { ".rosdata", 8, -2, SHT_PROGBITS, (SHF_ALLOC
3127 + SHF_V850_GPREL) },
3128 { ".sbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3129 + SHF_V850_GPREL) },
3130 { ".scommon", 8, -2, SHT_V850_SCOMMON, (SHF_ALLOC + SHF_WRITE
3131 + SHF_V850_GPREL) },
3132 { ".tdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3133 + SHF_V850_EPREL) },
3134 { ".tbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3135 + SHF_V850_EPREL) },
3136 { ".tcommon", 8, -2, SHT_V850_TCOMMON, (SHF_ALLOC + SHF_WRITE
3137 + SHF_V850_R0REL) },
3138 { ".zdata", 6, -2, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3139 + SHF_V850_R0REL) },
3140 { ".rozdata", 8, -2, SHT_PROGBITS, (SHF_ALLOC
3141 + SHF_V850_R0REL) },
3142 { ".zbss", 5, -2, SHT_NOBITS, (SHF_ALLOC + SHF_WRITE
3143 + SHF_V850_R0REL) },
3144 { ".zcommon", 8, -2, SHT_V850_ZCOMMON, (SHF_ALLOC + SHF_WRITE
3145 + SHF_V850_R0REL) },
3146 { ".call_table_data", 16, 0, SHT_PROGBITS, (SHF_ALLOC
3147 + SHF_WRITE) },
3148 { ".call_table_text", 16, 0, SHT_PROGBITS, (SHF_ALLOC + SHF_WRITE
3149 + SHF_EXECINSTR) },
3150 { NULL, 0, 0, 0, 0 }
2f89ff8d 3151};
252b5132
RH		 3152\f
3153#define TARGET_LITTLE_SYM bfd_elf32_v850_vec
3154#define TARGET_LITTLE_NAME "elf32-v850"
3155#define ELF_ARCH bfd_arch_v850
aa4f99bb
AO		 3156#define ELF_MACHINE_CODE EM_V850
3157#define ELF_MACHINE_ALT1 EM_CYGNUS_V850
252b5132 3158#define ELF_MAXPAGESIZE 0x1000
435b1e90 3159
252b5132
RH		 3160#define elf_info_to_howto v850_elf_info_to_howto_rela
3161#define elf_info_to_howto_rel v850_elf_info_to_howto_rel
3162
3163#define elf_backend_check_relocs v850_elf_check_relocs
3164#define elf_backend_relocate_section v850_elf_relocate_section
3165#define elf_backend_object_p v850_elf_object_p
3166#define elf_backend_final_write_processing v850_elf_final_write_processing
3167#define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section
3168#define elf_backend_symbol_processing v850_elf_symbol_processing
3169#define elf_backend_add_symbol_hook v850_elf_add_symbol_hook
3170#define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook
3171#define elf_backend_section_from_shdr v850_elf_section_from_shdr
3172#define elf_backend_fake_sections v850_elf_fake_sections
3173#define elf_backend_gc_mark_hook v850_elf_gc_mark_hook
3174#define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook
2f89ff8d 3175#define elf_backend_special_sections v850_elf_special_sections
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RH		 3176
3177#define elf_backend_can_gc_sections 1
f0fe0e16 3178#define elf_backend_rela_normal 1
252b5132 3179
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RH		 3180#define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name
3181#define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup
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RH		 3182#define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data
3183#define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags
3184#define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data
86aba9db 3185#define bfd_elf32_bfd_relax_section v850_elf_relax_section
252b5132
RH		 3186
3187#define elf_symbol_leading_char '_'
3188
3189#include "elf32-target.h"
GDB Binutils - Deliverables
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