| 1 | /* V850-specific support for 32-bit ELF |
| 2 | Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | |
| 21 | |
| 22 | /* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char |
| 23 | dependencies. As is the gas & simulator code or the v850. */ |
| 24 | |
| 25 | |
| 26 | #include "bfd.h" |
| 27 | #include "sysdep.h" |
| 28 | #include "bfdlink.h" |
| 29 | #include "libbfd.h" |
| 30 | #include "elf-bfd.h" |
| 31 | #include "elf/v850.h" |
| 32 | |
| 33 | /* sign-extend a 24-bit number */ |
| 34 | #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000) |
| 35 | |
| 36 | static reloc_howto_type *v850_elf_reloc_type_lookup |
| 37 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 38 | static void v850_elf_info_to_howto_rel |
| 39 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
| 40 | static void v850_elf_info_to_howto_rela |
| 41 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); |
| 42 | static bfd_reloc_status_type v850_elf_reloc |
| 43 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 44 | static boolean v850_elf_is_local_label_name |
| 45 | PARAMS ((bfd *, const char *)); |
| 46 | static boolean v850_elf_relocate_section |
| 47 | PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 48 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 49 | static bfd_reloc_status_type v850_elf_perform_relocation |
| 50 | PARAMS ((bfd *, int, bfd_vma, bfd_byte *)); |
| 51 | static boolean v850_elf_check_relocs |
| 52 | PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); |
| 53 | static void remember_hi16s_reloc |
| 54 | PARAMS ((bfd *, bfd_vma, bfd_byte *)); |
| 55 | static bfd_byte * find_remembered_hi16s_reloc |
| 56 | PARAMS ((bfd_vma, boolean *)); |
| 57 | static bfd_reloc_status_type v850_elf_final_link_relocate |
| 58 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, bfd_vma, |
| 59 | bfd_vma, bfd_vma, struct bfd_link_info *, asection *, int)); |
| 60 | static boolean v850_elf_object_p |
| 61 | PARAMS ((bfd *)); |
| 62 | static boolean v850_elf_fake_sections |
| 63 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); |
| 64 | static void v850_elf_final_write_processing |
| 65 | PARAMS ((bfd *, boolean)); |
| 66 | static boolean v850_elf_set_private_flags |
| 67 | PARAMS ((bfd *, flagword)); |
| 68 | static boolean v850_elf_copy_private_bfd_data |
| 69 | PARAMS ((bfd *, bfd *)); |
| 70 | static boolean v850_elf_merge_private_bfd_data |
| 71 | PARAMS ((bfd *, bfd *)); |
| 72 | static boolean v850_elf_print_private_bfd_data |
| 73 | PARAMS ((bfd *, PTR)); |
| 74 | static boolean v850_elf_section_from_bfd_section |
| 75 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *)); |
| 76 | static void v850_elf_symbol_processing |
| 77 | PARAMS ((bfd *, asymbol *)); |
| 78 | static boolean v850_elf_add_symbol_hook |
| 79 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 80 | const char **, flagword *, asection **, bfd_vma *)); |
| 81 | static boolean v850_elf_link_output_symbol_hook |
| 82 | PARAMS ((bfd *, struct bfd_link_info *, const char *, |
| 83 | Elf_Internal_Sym *, asection *)); |
| 84 | static boolean v850_elf_section_from_shdr |
| 85 | PARAMS ((bfd *, Elf_Internal_Shdr *, char *)); |
| 86 | |
| 87 | /* Note: It is REQUIRED that the 'type' value of each entry in this array |
| 88 | match the index of the entry in the array. */ |
| 89 | static reloc_howto_type v850_elf_howto_table[] = |
| 90 | { |
| 91 | /* This reloc does nothing. */ |
| 92 | HOWTO (R_V850_NONE, /* type */ |
| 93 | 0, /* rightshift */ |
| 94 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 95 | 32, /* bitsize */ |
| 96 | false, /* pc_relative */ |
| 97 | 0, /* bitpos */ |
| 98 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 99 | bfd_elf_generic_reloc, /* special_function */ |
| 100 | "R_V850_NONE", /* name */ |
| 101 | false, /* partial_inplace */ |
| 102 | 0, /* src_mask */ |
| 103 | 0, /* dst_mask */ |
| 104 | false), /* pcrel_offset */ |
| 105 | |
| 106 | /* A PC relative 9 bit branch. */ |
| 107 | HOWTO (R_V850_9_PCREL, /* type */ |
| 108 | 2, /* rightshift */ |
| 109 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 110 | 26, /* bitsize */ |
| 111 | true, /* pc_relative */ |
| 112 | 0, /* bitpos */ |
| 113 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 114 | v850_elf_reloc, /* special_function */ |
| 115 | "R_V850_9_PCREL", /* name */ |
| 116 | false, /* partial_inplace */ |
| 117 | 0x00ffffff, /* src_mask */ |
| 118 | 0x00ffffff, /* dst_mask */ |
| 119 | true), /* pcrel_offset */ |
| 120 | |
| 121 | /* A PC relative 22 bit branch. */ |
| 122 | HOWTO (R_V850_22_PCREL, /* type */ |
| 123 | 2, /* rightshift */ |
| 124 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 125 | 22, /* bitsize */ |
| 126 | true, /* pc_relative */ |
| 127 | 7, /* bitpos */ |
| 128 | complain_overflow_signed, /* complain_on_overflow */ |
| 129 | v850_elf_reloc, /* special_function */ |
| 130 | "R_V850_22_PCREL", /* name */ |
| 131 | false, /* partial_inplace */ |
| 132 | 0x07ffff80, /* src_mask */ |
| 133 | 0x07ffff80, /* dst_mask */ |
| 134 | true), /* pcrel_offset */ |
| 135 | |
| 136 | /* High 16 bits of symbol value. */ |
| 137 | HOWTO (R_V850_HI16_S, /* type */ |
| 138 | 0, /* rightshift */ |
| 139 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 140 | 16, /* bitsize */ |
| 141 | false, /* pc_relative */ |
| 142 | 0, /* bitpos */ |
| 143 | complain_overflow_dont, /* complain_on_overflow */ |
| 144 | v850_elf_reloc, /* special_function */ |
| 145 | "R_V850_HI16_S", /* name */ |
| 146 | false, /* partial_inplace */ |
| 147 | 0xffff, /* src_mask */ |
| 148 | 0xffff, /* dst_mask */ |
| 149 | false), /* pcrel_offset */ |
| 150 | |
| 151 | /* High 16 bits of symbol value. */ |
| 152 | HOWTO (R_V850_HI16, /* type */ |
| 153 | 0, /* rightshift */ |
| 154 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 155 | 16, /* bitsize */ |
| 156 | false, /* pc_relative */ |
| 157 | 0, /* bitpos */ |
| 158 | complain_overflow_dont, /* complain_on_overflow */ |
| 159 | v850_elf_reloc, /* special_function */ |
| 160 | "R_V850_HI16", /* name */ |
| 161 | false, /* partial_inplace */ |
| 162 | 0xffff, /* src_mask */ |
| 163 | 0xffff, /* dst_mask */ |
| 164 | false), /* pcrel_offset */ |
| 165 | |
| 166 | /* Low 16 bits of symbol value. */ |
| 167 | HOWTO (R_V850_LO16, /* type */ |
| 168 | 0, /* rightshift */ |
| 169 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 170 | 16, /* bitsize */ |
| 171 | false, /* pc_relative */ |
| 172 | 0, /* bitpos */ |
| 173 | complain_overflow_dont, /* complain_on_overflow */ |
| 174 | v850_elf_reloc, /* special_function */ |
| 175 | "R_V850_LO16", /* name */ |
| 176 | false, /* partial_inplace */ |
| 177 | 0xffff, /* src_mask */ |
| 178 | 0xffff, /* dst_mask */ |
| 179 | false), /* pcrel_offset */ |
| 180 | |
| 181 | /* Simple 32bit reloc. */ |
| 182 | HOWTO (R_V850_32, /* type */ |
| 183 | 0, /* rightshift */ |
| 184 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 185 | 32, /* bitsize */ |
| 186 | false, /* pc_relative */ |
| 187 | 0, /* bitpos */ |
| 188 | complain_overflow_dont, /* complain_on_overflow */ |
| 189 | v850_elf_reloc, /* special_function */ |
| 190 | "R_V850_32", /* name */ |
| 191 | false, /* partial_inplace */ |
| 192 | 0xffffffff, /* src_mask */ |
| 193 | 0xffffffff, /* dst_mask */ |
| 194 | false), /* pcrel_offset */ |
| 195 | |
| 196 | /* Simple 16bit reloc. */ |
| 197 | HOWTO (R_V850_16, /* type */ |
| 198 | 0, /* rightshift */ |
| 199 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 200 | 16, /* bitsize */ |
| 201 | false, /* pc_relative */ |
| 202 | 0, /* bitpos */ |
| 203 | complain_overflow_dont, /* complain_on_overflow */ |
| 204 | bfd_elf_generic_reloc, /* special_function */ |
| 205 | "R_V850_16", /* name */ |
| 206 | false, /* partial_inplace */ |
| 207 | 0xffff, /* src_mask */ |
| 208 | 0xffff, /* dst_mask */ |
| 209 | false), /* pcrel_offset */ |
| 210 | |
| 211 | /* Simple 8bit reloc. */ |
| 212 | HOWTO (R_V850_8, /* type */ |
| 213 | 0, /* rightshift */ |
| 214 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 215 | 8, /* bitsize */ |
| 216 | false, /* pc_relative */ |
| 217 | 0, /* bitpos */ |
| 218 | complain_overflow_dont, /* complain_on_overflow */ |
| 219 | bfd_elf_generic_reloc, /* special_function */ |
| 220 | "R_V850_8", /* name */ |
| 221 | false, /* partial_inplace */ |
| 222 | 0xff, /* src_mask */ |
| 223 | 0xff, /* dst_mask */ |
| 224 | false), /* pcrel_offset */ |
| 225 | |
| 226 | /* 16 bit offset from the short data area pointer. */ |
| 227 | HOWTO (R_V850_SDA_16_16_OFFSET, /* type */ |
| 228 | 0, /* rightshift */ |
| 229 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 230 | 16, /* bitsize */ |
| 231 | false, /* pc_relative */ |
| 232 | 0, /* bitpos */ |
| 233 | complain_overflow_dont, /* complain_on_overflow */ |
| 234 | v850_elf_reloc, /* special_function */ |
| 235 | "R_V850_SDA_16_16_OFFSET", /* name */ |
| 236 | false, /* partial_inplace */ |
| 237 | 0xffff, /* src_mask */ |
| 238 | 0xffff, /* dst_mask */ |
| 239 | false), /* pcrel_offset */ |
| 240 | |
| 241 | /* 15 bit offset from the short data area pointer. */ |
| 242 | HOWTO (R_V850_SDA_15_16_OFFSET, /* type */ |
| 243 | 1, /* rightshift */ |
| 244 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 245 | 16, /* bitsize */ |
| 246 | false, /* pc_relative */ |
| 247 | 1, /* bitpos */ |
| 248 | complain_overflow_dont, /* complain_on_overflow */ |
| 249 | v850_elf_reloc, /* special_function */ |
| 250 | "R_V850_SDA_15_16_OFFSET", /* name */ |
| 251 | false, /* partial_inplace */ |
| 252 | 0xfffe, /* src_mask */ |
| 253 | 0xfffe, /* dst_mask */ |
| 254 | false), /* pcrel_offset */ |
| 255 | |
| 256 | /* 16 bit offset from the zero data area pointer. */ |
| 257 | HOWTO (R_V850_ZDA_16_16_OFFSET, /* type */ |
| 258 | 0, /* rightshift */ |
| 259 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 260 | 16, /* bitsize */ |
| 261 | false, /* pc_relative */ |
| 262 | 0, /* bitpos */ |
| 263 | complain_overflow_dont, /* complain_on_overflow */ |
| 264 | v850_elf_reloc, /* special_function */ |
| 265 | "R_V850_ZDA_16_16_OFFSET", /* name */ |
| 266 | false, /* partial_inplace */ |
| 267 | 0xffff, /* src_mask */ |
| 268 | 0xffff, /* dst_mask */ |
| 269 | false), /* pcrel_offset */ |
| 270 | |
| 271 | /* 15 bit offset from the zero data area pointer. */ |
| 272 | HOWTO (R_V850_ZDA_15_16_OFFSET, /* type */ |
| 273 | 1, /* rightshift */ |
| 274 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 275 | 16, /* bitsize */ |
| 276 | false, /* pc_relative */ |
| 277 | 1, /* bitpos */ |
| 278 | complain_overflow_dont, /* complain_on_overflow */ |
| 279 | v850_elf_reloc, /* special_function */ |
| 280 | "R_V850_ZDA_15_16_OFFSET", /* name */ |
| 281 | false, /* partial_inplace */ |
| 282 | 0xfffe, /* src_mask */ |
| 283 | 0xfffe, /* dst_mask */ |
| 284 | false), /* pcrel_offset */ |
| 285 | |
| 286 | /* 6 bit offset from the tiny data area pointer. */ |
| 287 | HOWTO (R_V850_TDA_6_8_OFFSET, /* type */ |
| 288 | 2, /* rightshift */ |
| 289 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 290 | 8, /* bitsize */ |
| 291 | false, /* pc_relative */ |
| 292 | 1, /* bitpos */ |
| 293 | complain_overflow_dont, /* complain_on_overflow */ |
| 294 | v850_elf_reloc, /* special_function */ |
| 295 | "R_V850_TDA_6_8_OFFSET", /* name */ |
| 296 | false, /* partial_inplace */ |
| 297 | 0x7e, /* src_mask */ |
| 298 | 0x7e, /* dst_mask */ |
| 299 | false), /* pcrel_offset */ |
| 300 | |
| 301 | /* 8 bit offset from the tiny data area pointer. */ |
| 302 | HOWTO (R_V850_TDA_7_8_OFFSET, /* type */ |
| 303 | 1, /* rightshift */ |
| 304 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 305 | 8, /* bitsize */ |
| 306 | false, /* pc_relative */ |
| 307 | 0, /* bitpos */ |
| 308 | complain_overflow_dont, /* complain_on_overflow */ |
| 309 | v850_elf_reloc, /* special_function */ |
| 310 | "R_V850_TDA_7_8_OFFSET", /* name */ |
| 311 | false, /* partial_inplace */ |
| 312 | 0x7f, /* src_mask */ |
| 313 | 0x7f, /* dst_mask */ |
| 314 | false), /* pcrel_offset */ |
| 315 | |
| 316 | /* 7 bit offset from the tiny data area pointer. */ |
| 317 | HOWTO (R_V850_TDA_7_7_OFFSET, /* type */ |
| 318 | 0, /* rightshift */ |
| 319 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 320 | 7, /* bitsize */ |
| 321 | false, /* pc_relative */ |
| 322 | 0, /* bitpos */ |
| 323 | complain_overflow_dont, /* complain_on_overflow */ |
| 324 | v850_elf_reloc, /* special_function */ |
| 325 | "R_V850_TDA_7_7_OFFSET", /* name */ |
| 326 | false, /* partial_inplace */ |
| 327 | 0x7f, /* src_mask */ |
| 328 | 0x7f, /* dst_mask */ |
| 329 | false), /* pcrel_offset */ |
| 330 | |
| 331 | /* 16 bit offset from the tiny data area pointer! */ |
| 332 | HOWTO (R_V850_TDA_16_16_OFFSET, /* type */ |
| 333 | 0, /* rightshift */ |
| 334 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 335 | 16, /* bitsize */ |
| 336 | false, /* pc_relative */ |
| 337 | 0, /* bitpos */ |
| 338 | complain_overflow_dont, /* complain_on_overflow */ |
| 339 | v850_elf_reloc, /* special_function */ |
| 340 | "R_V850_TDA_16_16_OFFSET", /* name */ |
| 341 | false, /* partial_inplace */ |
| 342 | 0xffff, /* src_mask */ |
| 343 | 0xfff, /* dst_mask */ |
| 344 | false), /* pcrel_offset */ |
| 345 | |
| 346 | /* 5 bit offset from the tiny data area pointer. */ |
| 347 | HOWTO (R_V850_TDA_4_5_OFFSET, /* type */ |
| 348 | 1, /* rightshift */ |
| 349 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 350 | 5, /* bitsize */ |
| 351 | false, /* pc_relative */ |
| 352 | 0, /* bitpos */ |
| 353 | complain_overflow_dont, /* complain_on_overflow */ |
| 354 | v850_elf_reloc, /* special_function */ |
| 355 | "R_V850_TDA_4_5_OFFSET", /* name */ |
| 356 | false, /* partial_inplace */ |
| 357 | 0x0f, /* src_mask */ |
| 358 | 0x0f, /* dst_mask */ |
| 359 | false), /* pcrel_offset */ |
| 360 | |
| 361 | /* 4 bit offset from the tiny data area pointer. */ |
| 362 | HOWTO (R_V850_TDA_4_4_OFFSET, /* type */ |
| 363 | 0, /* rightshift */ |
| 364 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 365 | 4, /* bitsize */ |
| 366 | false, /* pc_relative */ |
| 367 | 0, /* bitpos */ |
| 368 | complain_overflow_dont, /* complain_on_overflow */ |
| 369 | v850_elf_reloc, /* special_function */ |
| 370 | "R_V850_TDA_4_4_OFFSET", /* name */ |
| 371 | false, /* partial_inplace */ |
| 372 | 0x0f, /* src_mask */ |
| 373 | 0x0f, /* dst_mask */ |
| 374 | false), /* pcrel_offset */ |
| 375 | |
| 376 | /* 16 bit offset from the short data area pointer. */ |
| 377 | HOWTO (R_V850_SDA_16_16_SPLIT_OFFSET, /* type */ |
| 378 | 0, /* rightshift */ |
| 379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 380 | 16, /* bitsize */ |
| 381 | false, /* pc_relative */ |
| 382 | 0, /* bitpos */ |
| 383 | complain_overflow_dont, /* complain_on_overflow */ |
| 384 | v850_elf_reloc, /* special_function */ |
| 385 | "R_V850_SDA_16_16_SPLIT_OFFSET",/* name */ |
| 386 | false, /* partial_inplace */ |
| 387 | 0xfffe0020, /* src_mask */ |
| 388 | 0xfffe0020, /* dst_mask */ |
| 389 | false), /* pcrel_offset */ |
| 390 | |
| 391 | /* 16 bit offset from the zero data area pointer. */ |
| 392 | HOWTO (R_V850_ZDA_16_16_SPLIT_OFFSET, /* type */ |
| 393 | 0, /* rightshift */ |
| 394 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 395 | 16, /* bitsize */ |
| 396 | false, /* pc_relative */ |
| 397 | 0, /* bitpos */ |
| 398 | complain_overflow_dont, /* complain_on_overflow */ |
| 399 | v850_elf_reloc, /* special_function */ |
| 400 | "R_V850_ZDA_16_16_SPLIT_OFFSET",/* name */ |
| 401 | false, /* partial_inplace */ |
| 402 | 0xfffe0020, /* src_mask */ |
| 403 | 0xfffe0020, /* dst_mask */ |
| 404 | false), /* pcrel_offset */ |
| 405 | |
| 406 | /* 6 bit offset from the call table base pointer. */ |
| 407 | HOWTO (R_V850_CALLT_6_7_OFFSET, /* type */ |
| 408 | 0, /* rightshift */ |
| 409 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 410 | 7, /* bitsize */ |
| 411 | false, /* pc_relative */ |
| 412 | 0, /* bitpos */ |
| 413 | complain_overflow_dont, /* complain_on_overflow */ |
| 414 | v850_elf_reloc, /* special_function */ |
| 415 | "R_V850_CALLT_6_7_OFFSET", /* name */ |
| 416 | false, /* partial_inplace */ |
| 417 | 0x3f, /* src_mask */ |
| 418 | 0x3f, /* dst_mask */ |
| 419 | false), /* pcrel_offset */ |
| 420 | |
| 421 | /* 16 bit offset from the call table base pointer. */ |
| 422 | HOWTO (R_V850_CALLT_16_16_OFFSET, /* type */ |
| 423 | 0, /* rightshift */ |
| 424 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 425 | 16, /* bitsize */ |
| 426 | false, /* pc_relative */ |
| 427 | 0, /* bitpos */ |
| 428 | complain_overflow_dont, /* complain_on_overflow */ |
| 429 | v850_elf_reloc, /* special_function */ |
| 430 | "R_V850_CALLT_16_16_OFFSET", /* name */ |
| 431 | false, /* partial_inplace */ |
| 432 | 0xffff, /* src_mask */ |
| 433 | 0xffff, /* dst_mask */ |
| 434 | false), /* pcrel_offset */ |
| 435 | |
| 436 | /* GNU extension to record C++ vtable hierarchy */ |
| 437 | HOWTO (R_V850_GNU_VTINHERIT, /* type */ |
| 438 | 0, /* rightshift */ |
| 439 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 440 | 0, /* bitsize */ |
| 441 | false, /* pc_relative */ |
| 442 | 0, /* bitpos */ |
| 443 | complain_overflow_dont, /* complain_on_overflow */ |
| 444 | NULL, /* special_function */ |
| 445 | "R_V850_GNU_VTINHERIT", /* name */ |
| 446 | false, /* partial_inplace */ |
| 447 | 0, /* src_mask */ |
| 448 | 0, /* dst_mask */ |
| 449 | false), /* pcrel_offset */ |
| 450 | |
| 451 | /* GNU extension to record C++ vtable member usage */ |
| 452 | HOWTO (R_V850_GNU_VTENTRY, /* type */ |
| 453 | 0, /* rightshift */ |
| 454 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 455 | 0, /* bitsize */ |
| 456 | false, /* pc_relative */ |
| 457 | 0, /* bitpos */ |
| 458 | complain_overflow_dont, /* complain_on_overflow */ |
| 459 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 460 | "R_V850_GNU_VTENTRY", /* name */ |
| 461 | false, /* partial_inplace */ |
| 462 | 0, /* src_mask */ |
| 463 | 0, /* dst_mask */ |
| 464 | false), /* pcrel_offset */ |
| 465 | |
| 466 | }; |
| 467 | |
| 468 | /* Map BFD reloc types to V850 ELF reloc types. */ |
| 469 | |
| 470 | struct v850_elf_reloc_map |
| 471 | { |
| 472 | /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an |
| 473 | unsigned char. */ |
| 474 | bfd_reloc_code_real_type bfd_reloc_val; |
| 475 | unsigned char elf_reloc_val; |
| 476 | }; |
| 477 | |
| 478 | static const struct v850_elf_reloc_map v850_elf_reloc_map[] = |
| 479 | { |
| 480 | { BFD_RELOC_NONE, R_V850_NONE }, |
| 481 | { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL }, |
| 482 | { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL }, |
| 483 | { BFD_RELOC_HI16_S, R_V850_HI16_S }, |
| 484 | { BFD_RELOC_HI16, R_V850_HI16 }, |
| 485 | { BFD_RELOC_LO16, R_V850_LO16 }, |
| 486 | { BFD_RELOC_32, R_V850_32 }, |
| 487 | { BFD_RELOC_16, R_V850_16 }, |
| 488 | { BFD_RELOC_8, R_V850_8 }, |
| 489 | { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET }, |
| 490 | { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET }, |
| 491 | { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET }, |
| 492 | { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET }, |
| 493 | { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET }, |
| 494 | { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET }, |
| 495 | { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET }, |
| 496 | { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET }, |
| 497 | { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET }, |
| 498 | { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET }, |
| 499 | { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET }, |
| 500 | { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET }, |
| 501 | { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET }, |
| 502 | { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET }, |
| 503 | { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT }, |
| 504 | { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY }, |
| 505 | |
| 506 | }; |
| 507 | |
| 508 | \f |
| 509 | /* Map a bfd relocation into the appropriate howto structure */ |
| 510 | static reloc_howto_type * |
| 511 | v850_elf_reloc_type_lookup (abfd, code) |
| 512 | bfd * abfd ATTRIBUTE_UNUSED; |
| 513 | bfd_reloc_code_real_type code; |
| 514 | { |
| 515 | unsigned int i; |
| 516 | |
| 517 | for (i = 0; |
| 518 | i < sizeof (v850_elf_reloc_map) / sizeof (struct v850_elf_reloc_map); |
| 519 | i++) |
| 520 | { |
| 521 | if (v850_elf_reloc_map[i].bfd_reloc_val == code) |
| 522 | { |
| 523 | BFD_ASSERT (v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val].type == v850_elf_reloc_map[i].elf_reloc_val); |
| 524 | |
| 525 | return & v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val]; |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | return NULL; |
| 530 | } |
| 531 | |
| 532 | \f |
| 533 | /* Set the howto pointer for an V850 ELF reloc. */ |
| 534 | static void |
| 535 | v850_elf_info_to_howto_rel (abfd, cache_ptr, dst) |
| 536 | bfd * abfd ATTRIBUTE_UNUSED; |
| 537 | arelent * cache_ptr; |
| 538 | Elf32_Internal_Rel * dst; |
| 539 | { |
| 540 | unsigned int r_type; |
| 541 | |
| 542 | r_type = ELF32_R_TYPE (dst->r_info); |
| 543 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); |
| 544 | cache_ptr->howto = &v850_elf_howto_table[r_type]; |
| 545 | } |
| 546 | |
| 547 | /* Set the howto pointer for a V850 ELF reloc (type RELA). */ |
| 548 | static void |
| 549 | v850_elf_info_to_howto_rela (abfd, cache_ptr, dst) |
| 550 | bfd * abfd ATTRIBUTE_UNUSED; |
| 551 | arelent * cache_ptr; |
| 552 | Elf32_Internal_Rela *dst; |
| 553 | { |
| 554 | unsigned int r_type; |
| 555 | |
| 556 | r_type = ELF32_R_TYPE (dst->r_info); |
| 557 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); |
| 558 | cache_ptr->howto = &v850_elf_howto_table[r_type]; |
| 559 | } |
| 560 | |
| 561 | \f |
| 562 | /* Look through the relocs for a section during the first phase, and |
| 563 | allocate space in the global offset table or procedure linkage |
| 564 | table. */ |
| 565 | |
| 566 | static boolean |
| 567 | v850_elf_check_relocs (abfd, info, sec, relocs) |
| 568 | bfd * abfd; |
| 569 | struct bfd_link_info * info; |
| 570 | asection * sec; |
| 571 | const Elf_Internal_Rela * relocs; |
| 572 | { |
| 573 | boolean ret = true; |
| 574 | bfd *dynobj; |
| 575 | Elf_Internal_Shdr *symtab_hdr; |
| 576 | struct elf_link_hash_entry **sym_hashes; |
| 577 | const Elf_Internal_Rela *rel; |
| 578 | const Elf_Internal_Rela *rel_end; |
| 579 | asection *sreloc; |
| 580 | enum v850_reloc_type r_type; |
| 581 | int other = 0; |
| 582 | const char *common = (const char *)0; |
| 583 | |
| 584 | if (info->relocateable) |
| 585 | return true; |
| 586 | |
| 587 | #ifdef DEBUG |
| 588 | fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n", |
| 589 | bfd_get_section_name (abfd, sec), |
| 590 | bfd_get_filename (abfd)); |
| 591 | #endif |
| 592 | |
| 593 | dynobj = elf_hash_table (info)->dynobj; |
| 594 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 595 | sym_hashes = elf_sym_hashes (abfd); |
| 596 | sreloc = NULL; |
| 597 | |
| 598 | rel_end = relocs + sec->reloc_count; |
| 599 | for (rel = relocs; rel < rel_end; rel++) |
| 600 | { |
| 601 | unsigned long r_symndx; |
| 602 | struct elf_link_hash_entry *h; |
| 603 | |
| 604 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 605 | if (r_symndx < symtab_hdr->sh_info) |
| 606 | h = NULL; |
| 607 | else |
| 608 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 609 | |
| 610 | r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info); |
| 611 | switch (r_type) |
| 612 | { |
| 613 | default: |
| 614 | case R_V850_NONE: |
| 615 | case R_V850_9_PCREL: |
| 616 | case R_V850_22_PCREL: |
| 617 | case R_V850_HI16_S: |
| 618 | case R_V850_HI16: |
| 619 | case R_V850_LO16: |
| 620 | case R_V850_32: |
| 621 | case R_V850_16: |
| 622 | case R_V850_8: |
| 623 | case R_V850_CALLT_6_7_OFFSET: |
| 624 | case R_V850_CALLT_16_16_OFFSET: |
| 625 | break; |
| 626 | |
| 627 | /* This relocation describes the C++ object vtable hierarchy. |
| 628 | Reconstruct it for later use during GC. */ |
| 629 | case R_V850_GNU_VTINHERIT: |
| 630 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 631 | return false; |
| 632 | break; |
| 633 | |
| 634 | /* This relocation describes which C++ vtable entries are actually |
| 635 | used. Record for later use during GC. */ |
| 636 | case R_V850_GNU_VTENTRY: |
| 637 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 638 | return false; |
| 639 | break; |
| 640 | |
| 641 | case R_V850_SDA_16_16_SPLIT_OFFSET: |
| 642 | case R_V850_SDA_16_16_OFFSET: |
| 643 | case R_V850_SDA_15_16_OFFSET: |
| 644 | other = V850_OTHER_SDA; |
| 645 | common = ".scommon"; |
| 646 | goto small_data_common; |
| 647 | |
| 648 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
| 649 | case R_V850_ZDA_16_16_OFFSET: |
| 650 | case R_V850_ZDA_15_16_OFFSET: |
| 651 | other = V850_OTHER_ZDA; |
| 652 | common = ".zcommon"; |
| 653 | goto small_data_common; |
| 654 | |
| 655 | case R_V850_TDA_4_5_OFFSET: |
| 656 | case R_V850_TDA_4_4_OFFSET: |
| 657 | case R_V850_TDA_6_8_OFFSET: |
| 658 | case R_V850_TDA_7_8_OFFSET: |
| 659 | case R_V850_TDA_7_7_OFFSET: |
| 660 | case R_V850_TDA_16_16_OFFSET: |
| 661 | other = V850_OTHER_TDA; |
| 662 | common = ".tcommon"; |
| 663 | /* fall through */ |
| 664 | |
| 665 | #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA) |
| 666 | |
| 667 | small_data_common: |
| 668 | if (h) |
| 669 | { |
| 670 | h->other |= other; /* flag which type of relocation was used */ |
| 671 | if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK) |
| 672 | && (h->other & V850_OTHER_ERROR) == 0) |
| 673 | { |
| 674 | const char * msg; |
| 675 | static char buff[200]; /* XXX */ |
| 676 | |
| 677 | switch (h->other & V850_OTHER_MASK) |
| 678 | { |
| 679 | default: |
| 680 | msg = _("Variable `%s' cannot occupy in multiple small data regions"); |
| 681 | break; |
| 682 | case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA: |
| 683 | msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions"); |
| 684 | break; |
| 685 | case V850_OTHER_SDA | V850_OTHER_ZDA: |
| 686 | msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously"); |
| 687 | break; |
| 688 | case V850_OTHER_SDA | V850_OTHER_TDA: |
| 689 | msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously"); |
| 690 | break; |
| 691 | case V850_OTHER_ZDA | V850_OTHER_TDA: |
| 692 | msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously"); |
| 693 | break; |
| 694 | } |
| 695 | |
| 696 | sprintf (buff, msg, h->root.root.string); |
| 697 | info->callbacks->warning (info, buff, h->root.root.string, |
| 698 | abfd, h->root.u.def.section, 0); |
| 699 | |
| 700 | bfd_set_error (bfd_error_bad_value); |
| 701 | h->other |= V850_OTHER_ERROR; |
| 702 | ret = false; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | if (h && h->root.type == bfd_link_hash_common |
| 707 | && h->root.u.c.p |
| 708 | && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON")) |
| 709 | { |
| 710 | asection *section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common); |
| 711 | section->flags |= SEC_IS_COMMON; |
| 712 | } |
| 713 | |
| 714 | #ifdef DEBUG |
| 715 | fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n", |
| 716 | v850_elf_howto_table[ (int)r_type ].name, |
| 717 | (h && h->root.root.string) ? h->root.root.string : "<unknown>", |
| 718 | (h->root.type == bfd_link_hash_common) ? ", symbol is common" : ""); |
| 719 | #endif |
| 720 | break; |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | return ret; |
| 725 | } |
| 726 | |
| 727 | /* |
| 728 | * In the old version, when an entry was checked out from the table, |
| 729 | * it was deleted. This produced an error if the entry was needed |
| 730 | * more than once, as the second attempted retry failed. |
| 731 | * |
| 732 | * In the current version, the entry is not deleted, instead we set |
| 733 | * the field 'found' to true. If a second lookup matches the same |
| 734 | * entry, then we know that the hi16s reloc has already been updated |
| 735 | * and does not need to be updated a second time. |
| 736 | * |
| 737 | * TODO - TOFIX: If it is possible that we need to restore 2 different |
| 738 | * addresses from the same table entry, where the first generates an |
| 739 | * overflow, whilst the second do not, then this code will fail. |
| 740 | */ |
| 741 | |
| 742 | typedef struct hi16s_location |
| 743 | { |
| 744 | bfd_vma addend; |
| 745 | bfd_byte * address; |
| 746 | unsigned long counter; |
| 747 | boolean found; |
| 748 | struct hi16s_location * next; |
| 749 | } |
| 750 | hi16s_location; |
| 751 | |
| 752 | static hi16s_location * previous_hi16s; |
| 753 | static hi16s_location * free_hi16s; |
| 754 | static unsigned long hi16s_counter; |
| 755 | |
| 756 | static void |
| 757 | remember_hi16s_reloc (abfd, addend, address) |
| 758 | bfd * abfd; |
| 759 | bfd_vma addend; |
| 760 | bfd_byte * address; |
| 761 | { |
| 762 | hi16s_location * entry = NULL; |
| 763 | |
| 764 | /* Find a free structure. */ |
| 765 | if (free_hi16s == NULL) |
| 766 | free_hi16s = (hi16s_location *) bfd_zalloc (abfd, sizeof (* free_hi16s)); |
| 767 | |
| 768 | entry = free_hi16s; |
| 769 | free_hi16s = free_hi16s->next; |
| 770 | |
| 771 | entry->addend = addend; |
| 772 | entry->address = address; |
| 773 | entry->counter = hi16s_counter ++; |
| 774 | entry->found = false; |
| 775 | entry->next = previous_hi16s; |
| 776 | previous_hi16s = entry; |
| 777 | |
| 778 | /* Cope with wrap around of our counter. */ |
| 779 | if (hi16s_counter == 0) |
| 780 | { |
| 781 | /* XXX - Assume that all counter entries differ only in their low 16 bits. */ |
| 782 | for (entry = previous_hi16s; entry != NULL; entry = entry->next) |
| 783 | entry->counter &= 0xffff; |
| 784 | |
| 785 | hi16s_counter = 0x10000; |
| 786 | } |
| 787 | |
| 788 | return; |
| 789 | } |
| 790 | |
| 791 | static bfd_byte * |
| 792 | find_remembered_hi16s_reloc (addend, already_found) |
| 793 | bfd_vma addend; |
| 794 | boolean * already_found; |
| 795 | { |
| 796 | hi16s_location * match = NULL; |
| 797 | hi16s_location * entry; |
| 798 | hi16s_location * previous = NULL; |
| 799 | hi16s_location * prev; |
| 800 | bfd_byte * addr; |
| 801 | |
| 802 | /* Search the table. Record the most recent entry that matches. */ |
| 803 | for (entry = previous_hi16s; entry; entry = entry->next) |
| 804 | { |
| 805 | if (entry->addend == addend |
| 806 | && (match == NULL || match->counter < entry->counter)) |
| 807 | { |
| 808 | previous = prev; |
| 809 | match = entry; |
| 810 | } |
| 811 | |
| 812 | prev = entry; |
| 813 | } |
| 814 | |
| 815 | if (match == NULL) |
| 816 | return NULL; |
| 817 | |
| 818 | /* Extract the address. */ |
| 819 | addr = match->address; |
| 820 | |
| 821 | /* Remeber if this entry has already been used before. */ |
| 822 | if (already_found) |
| 823 | * already_found = match->found; |
| 824 | |
| 825 | /* Note that this entry has now been used. */ |
| 826 | match->found = true; |
| 827 | |
| 828 | return addr; |
| 829 | } |
| 830 | |
| 831 | /* FIXME: The code here probably ought to be removed and the code in reloc.c |
| 832 | allowed to do its stuff instead. At least for most of the relocs, anwyay. */ |
| 833 | static bfd_reloc_status_type |
| 834 | v850_elf_perform_relocation (abfd, r_type, addend, address) |
| 835 | bfd * abfd; |
| 836 | int r_type; |
| 837 | bfd_vma addend; |
| 838 | bfd_byte * address; |
| 839 | { |
| 840 | unsigned long insn; |
| 841 | bfd_signed_vma saddend = (bfd_signed_vma) addend; |
| 842 | |
| 843 | switch (r_type) |
| 844 | { |
| 845 | default: |
| 846 | /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */ |
| 847 | return bfd_reloc_notsupported; |
| 848 | |
| 849 | case R_V850_32: |
| 850 | bfd_put_32 (abfd, addend, address); |
| 851 | return bfd_reloc_ok; |
| 852 | |
| 853 | case R_V850_22_PCREL: |
| 854 | if (saddend > 0x1fffff || saddend < -0x200000) |
| 855 | return bfd_reloc_overflow; |
| 856 | |
| 857 | if ((addend % 2) != 0) |
| 858 | return bfd_reloc_dangerous; |
| 859 | |
| 860 | insn = bfd_get_32 (abfd, address); |
| 861 | insn &= ~0xfffe003f; |
| 862 | insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16)); |
| 863 | bfd_put_32 (abfd, insn, address); |
| 864 | return bfd_reloc_ok; |
| 865 | |
| 866 | case R_V850_9_PCREL: |
| 867 | if (saddend > 0xff || saddend < -0x100) |
| 868 | return bfd_reloc_overflow; |
| 869 | |
| 870 | if ((addend % 2) != 0) |
| 871 | return bfd_reloc_dangerous; |
| 872 | |
| 873 | insn = bfd_get_16 (abfd, address); |
| 874 | insn &= ~ 0xf870; |
| 875 | insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3); |
| 876 | break; |
| 877 | |
| 878 | case R_V850_HI16: |
| 879 | addend += (bfd_get_16 (abfd, address) << 16); |
| 880 | addend = (addend >> 16); |
| 881 | insn = addend; |
| 882 | break; |
| 883 | |
| 884 | case R_V850_HI16_S: |
| 885 | /* Remember where this relocation took place. */ |
| 886 | remember_hi16s_reloc (abfd, addend, address); |
| 887 | |
| 888 | addend += (bfd_get_16 (abfd, address) << 16); |
| 889 | addend = (addend >> 16) + ((addend & 0x8000) != 0); |
| 890 | |
| 891 | /* This relocation cannot overflow. */ |
| 892 | if (addend > 0x7fff) |
| 893 | addend = 0; |
| 894 | |
| 895 | insn = addend; |
| 896 | break; |
| 897 | |
| 898 | case R_V850_LO16: |
| 899 | /* Calculate the sum of the value stored in the instruction and the |
| 900 | addend and check for overflow from the low 16 bits into the high |
| 901 | 16 bits. The assembler has already done some of this: If the |
| 902 | value stored in the instruction has its 15th bit set, (counting |
| 903 | from zero) then the assembler will have added 1 to the value |
| 904 | stored in the associated HI16S reloc. So for example, these |
| 905 | relocations: |
| 906 | |
| 907 | movhi hi( fred ), r0, r1 |
| 908 | movea lo( fred ), r1, r1 |
| 909 | |
| 910 | will store 0 in the value fields for the MOVHI and MOVEA instructions |
| 911 | and addend will be the address of fred, but for these instructions: |
| 912 | |
| 913 | movhi hi( fred + 0x123456), r0, r1 |
| 914 | movea lo( fred + 0x123456), r1, r1 |
| 915 | |
| 916 | the value stored in the MOVHI instruction will be 0x12 and the value |
| 917 | stored in the MOVEA instruction will be 0x3456. If however the |
| 918 | instructions were: |
| 919 | |
| 920 | movhi hi( fred + 0x10ffff), r0, r1 |
| 921 | movea lo( fred + 0x10ffff), r1, r1 |
| 922 | |
| 923 | then the value stored in the MOVHI instruction would be 0x11 (not |
| 924 | 0x10) and the value stored in the MOVEA instruction would be 0xffff. |
| 925 | Thus (assuming for the moment that the addend is 0), at run time the |
| 926 | MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction |
| 927 | adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if |
| 928 | the instructions were: |
| 929 | |
| 930 | movhi hi( fred - 1), r0, r1 |
| 931 | movea lo( fred - 1), r1, r1 |
| 932 | |
| 933 | then 0 is stored in the MOVHI instruction and -1 is stored in the |
| 934 | MOVEA instruction. |
| 935 | |
| 936 | Overflow can occur if the addition of the value stored in the |
| 937 | instruction plus the addend sets the 15th bit when before it was clear. |
| 938 | This is because the 15th bit will be sign extended into the high part, |
| 939 | thus reducing its value by one, but since the 15th bit was originally |
| 940 | clear, the assembler will not have added 1 to the previous HI16S reloc |
| 941 | to compensate for this effect. For example: |
| 942 | |
| 943 | movhi hi( fred + 0x123456), r0, r1 |
| 944 | movea lo( fred + 0x123456), r1, r1 |
| 945 | |
| 946 | The value stored in HI16S reloc is 0x12, the value stored in the LO16 |
| 947 | reloc is 0x3456. If we assume that the address of fred is 0x00007000 |
| 948 | then the relocations become: |
| 949 | |
| 950 | HI16S: 0x0012 + (0x00007000 >> 16) = 0x12 |
| 951 | LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456 |
| 952 | |
| 953 | but when the instructions are executed, the MOVEA instruction's value |
| 954 | is signed extended, so the sum becomes: |
| 955 | |
| 956 | 0x00120000 |
| 957 | + 0xffffa456 |
| 958 | ------------ |
| 959 | 0x0011a456 but 'fred + 0x123456' = 0x0012a456 |
| 960 | |
| 961 | Note that if the 15th bit was set in the value stored in the LO16 |
| 962 | reloc, then we do not have to do anything: |
| 963 | |
| 964 | movhi hi( fred + 0x10ffff), r0, r1 |
| 965 | movea lo( fred + 0x10ffff), r1, r1 |
| 966 | |
| 967 | HI16S: 0x0011 + (0x00007000 >> 16) = 0x11 |
| 968 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff |
| 969 | |
| 970 | 0x00110000 |
| 971 | + 0x00006fff |
| 972 | ------------ |
| 973 | 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff |
| 974 | |
| 975 | |
| 976 | Overflow can also occur if the computation carries into the 16th bit |
| 977 | and it also results in the 15th bit having the same value as the 15th |
| 978 | bit of the original value. What happens is that the HI16S reloc |
| 979 | will have already examined the 15th bit of the original value and |
| 980 | added 1 to the high part if the bit is set. This compensates for the |
| 981 | sign extension of 15th bit of the result of the computation. But now |
| 982 | there is a carry into the 16th bit, and this has not been allowed for. |
| 983 | |
| 984 | So, for example if fred is at address 0xf000: |
| 985 | |
| 986 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] |
| 987 | movea lo( fred + 0xffff), r1, r1 |
| 988 | |
| 989 | HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001 |
| 990 | LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost) |
| 991 | |
| 992 | 0x00010000 |
| 993 | + 0xffffefff |
| 994 | ------------ |
| 995 | 0x0000efff but 'fred + 0xffff' = 0x0001efff |
| 996 | |
| 997 | Similarly, if the 15th bit remains clear, but overflow occurs into |
| 998 | the 16th bit then (assuming the address of fred is 0xf000): |
| 999 | |
| 1000 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] |
| 1001 | movea lo( fred + 0x7000), r1, r1 |
| 1002 | |
| 1003 | HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000 |
| 1004 | LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost) |
| 1005 | |
| 1006 | 0x00000000 |
| 1007 | + 0x00006fff |
| 1008 | ------------ |
| 1009 | 0x00006fff but 'fred + 0x7000' = 0x00016fff |
| 1010 | |
| 1011 | Note - there is no need to change anything if a carry occurs, and the |
| 1012 | 15th bit changes its value from being set to being clear, as the HI16S |
| 1013 | reloc will have already added in 1 to the high part for us: |
| 1014 | |
| 1015 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] |
| 1016 | movea lo( fred + 0xffff), r1, r1 |
| 1017 | |
| 1018 | HI16S: 0x0001 + (0x00007000 >> 16) |
| 1019 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost) |
| 1020 | |
| 1021 | 0x00010000 |
| 1022 | + 0x00006fff (bit 15 not set, so the top half is zero) |
| 1023 | ------------ |
| 1024 | 0x00016fff which is right (assuming that fred is at 0x7000) |
| 1025 | |
| 1026 | but if the 15th bit goes from being clear to being set, then we must |
| 1027 | once again handle overflow: |
| 1028 | |
| 1029 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] |
| 1030 | movea lo( fred + 0x7000), r1, r1 |
| 1031 | |
| 1032 | HI16S: 0x0000 + (0x0000ffff >> 16) |
| 1033 | LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16) |
| 1034 | |
| 1035 | 0x00000000 |
| 1036 | + 0x00006fff (bit 15 not set, so the top half is zero) |
| 1037 | ------------ |
| 1038 | 0x00006fff which is wrong (assuming that fred is at 0xffff) |
| 1039 | */ |
| 1040 | |
| 1041 | { |
| 1042 | long result; |
| 1043 | |
| 1044 | insn = bfd_get_16 (abfd, address); |
| 1045 | result = insn + addend; |
| 1046 | |
| 1047 | #define BIT15_SET(x) ((x) & 0x8000) |
| 1048 | #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff) |
| 1049 | |
| 1050 | if ((BIT15_SET (result) && ! BIT15_SET (addend)) |
| 1051 | || (OVERFLOWS (addend, insn) |
| 1052 | && ((! BIT15_SET (insn)) || (BIT15_SET (addend))))) |
| 1053 | { |
| 1054 | boolean already_updated; |
| 1055 | bfd_byte * hi16s_address = find_remembered_hi16s_reloc |
| 1056 | (addend, & already_updated); |
| 1057 | |
| 1058 | /* Amend the matching HI16_S relocation. */ |
| 1059 | if (hi16s_address != NULL) |
| 1060 | { |
| 1061 | if (! already_updated) |
| 1062 | { |
| 1063 | insn = bfd_get_16 (abfd, hi16s_address); |
| 1064 | insn += 1; |
| 1065 | bfd_put_16 (abfd, insn, hi16s_address); |
| 1066 | } |
| 1067 | } |
| 1068 | else |
| 1069 | { |
| 1070 | fprintf (stderr, _("FAILED to find previous HI16 reloc\n")); |
| 1071 | return bfd_reloc_overflow; |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | /* Do not complain if value has top bit set, as this has been anticipated. */ |
| 1076 | insn = result & 0xffff; |
| 1077 | break; |
| 1078 | } |
| 1079 | |
| 1080 | case R_V850_8: |
| 1081 | addend += (char) bfd_get_8 (abfd, address); |
| 1082 | |
| 1083 | saddend = (bfd_signed_vma) addend; |
| 1084 | |
| 1085 | if (saddend > 0x7f || saddend < -0x80) |
| 1086 | return bfd_reloc_overflow; |
| 1087 | |
| 1088 | bfd_put_8 (abfd, addend, address); |
| 1089 | return bfd_reloc_ok; |
| 1090 | |
| 1091 | case R_V850_CALLT_16_16_OFFSET: |
| 1092 | addend += bfd_get_16 (abfd, address); |
| 1093 | |
| 1094 | saddend = (bfd_signed_vma) addend; |
| 1095 | |
| 1096 | if (saddend > 0xffff || saddend < 0) |
| 1097 | return bfd_reloc_overflow; |
| 1098 | |
| 1099 | insn = addend; |
| 1100 | break; |
| 1101 | |
| 1102 | case R_V850_16: |
| 1103 | |
| 1104 | /* drop through */ |
| 1105 | case R_V850_SDA_16_16_OFFSET: |
| 1106 | case R_V850_ZDA_16_16_OFFSET: |
| 1107 | case R_V850_TDA_16_16_OFFSET: |
| 1108 | addend += bfd_get_16 (abfd, address); |
| 1109 | |
| 1110 | saddend = (bfd_signed_vma) addend; |
| 1111 | |
| 1112 | if (saddend > 0x7fff || saddend < -0x8000) |
| 1113 | return bfd_reloc_overflow; |
| 1114 | |
| 1115 | insn = addend; |
| 1116 | break; |
| 1117 | |
| 1118 | case R_V850_SDA_15_16_OFFSET: |
| 1119 | case R_V850_ZDA_15_16_OFFSET: |
| 1120 | insn = bfd_get_16 (abfd, address); |
| 1121 | addend += (insn & 0xfffe); |
| 1122 | |
| 1123 | saddend = (bfd_signed_vma) addend; |
| 1124 | |
| 1125 | if (saddend > 0x7ffe || saddend < -0x8000) |
| 1126 | return bfd_reloc_overflow; |
| 1127 | |
| 1128 | if (addend & 1) |
| 1129 | return bfd_reloc_dangerous; |
| 1130 | |
| 1131 | insn = (addend & ~1) | (insn & 1); |
| 1132 | break; |
| 1133 | |
| 1134 | case R_V850_TDA_6_8_OFFSET: |
| 1135 | insn = bfd_get_16 (abfd, address); |
| 1136 | addend += ((insn & 0x7e) << 1); |
| 1137 | |
| 1138 | saddend = (bfd_signed_vma) addend; |
| 1139 | |
| 1140 | if (saddend > 0xfc || saddend < 0) |
| 1141 | return bfd_reloc_overflow; |
| 1142 | |
| 1143 | if (addend & 3) |
| 1144 | return bfd_reloc_dangerous; |
| 1145 | |
| 1146 | insn &= 0xff81; |
| 1147 | insn |= (addend >> 1); |
| 1148 | break; |
| 1149 | |
| 1150 | case R_V850_TDA_7_8_OFFSET: |
| 1151 | insn = bfd_get_16 (abfd, address); |
| 1152 | addend += ((insn & 0x7f) << 1); |
| 1153 | |
| 1154 | saddend = (bfd_signed_vma) addend; |
| 1155 | |
| 1156 | if (saddend > 0xfe || saddend < 0) |
| 1157 | return bfd_reloc_overflow; |
| 1158 | |
| 1159 | if (addend & 1) |
| 1160 | return bfd_reloc_dangerous; |
| 1161 | |
| 1162 | insn &= 0xff80; |
| 1163 | insn |= (addend >> 1); |
| 1164 | break; |
| 1165 | |
| 1166 | case R_V850_TDA_7_7_OFFSET: |
| 1167 | insn = bfd_get_16 (abfd, address); |
| 1168 | addend += insn & 0x7f; |
| 1169 | |
| 1170 | saddend = (bfd_signed_vma) addend; |
| 1171 | |
| 1172 | if (saddend > 0x7f || saddend < 0) |
| 1173 | return bfd_reloc_overflow; |
| 1174 | |
| 1175 | insn &= 0xff80; |
| 1176 | insn |= addend; |
| 1177 | break; |
| 1178 | |
| 1179 | case R_V850_TDA_4_5_OFFSET: |
| 1180 | insn = bfd_get_16 (abfd, address); |
| 1181 | addend += ((insn & 0xf) << 1); |
| 1182 | |
| 1183 | saddend = (bfd_signed_vma) addend; |
| 1184 | |
| 1185 | if (saddend > 0x1e || saddend < 0) |
| 1186 | return bfd_reloc_overflow; |
| 1187 | |
| 1188 | if (addend & 1) |
| 1189 | return bfd_reloc_dangerous; |
| 1190 | |
| 1191 | insn &= 0xfff0; |
| 1192 | insn |= (addend >> 1); |
| 1193 | break; |
| 1194 | |
| 1195 | case R_V850_TDA_4_4_OFFSET: |
| 1196 | insn = bfd_get_16 (abfd, address); |
| 1197 | addend += insn & 0xf; |
| 1198 | |
| 1199 | saddend = (bfd_signed_vma) addend; |
| 1200 | |
| 1201 | if (saddend > 0xf || saddend < 0) |
| 1202 | return bfd_reloc_overflow; |
| 1203 | |
| 1204 | insn &= 0xfff0; |
| 1205 | insn |= addend; |
| 1206 | break; |
| 1207 | |
| 1208 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
| 1209 | case R_V850_SDA_16_16_SPLIT_OFFSET: |
| 1210 | insn = bfd_get_32 (abfd, address); |
| 1211 | addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5); |
| 1212 | |
| 1213 | saddend = (bfd_signed_vma) addend; |
| 1214 | |
| 1215 | if (saddend > 0x7fff || saddend < -0x8000) |
| 1216 | return bfd_reloc_overflow; |
| 1217 | |
| 1218 | insn &= 0x0001ffdf; |
| 1219 | insn |= (addend & 1) << 5; |
| 1220 | insn |= (addend & ~1) << 16; |
| 1221 | |
| 1222 | bfd_put_32 (abfd, insn, address); |
| 1223 | return bfd_reloc_ok; |
| 1224 | |
| 1225 | case R_V850_CALLT_6_7_OFFSET: |
| 1226 | insn = bfd_get_16 (abfd, address); |
| 1227 | addend += ((insn & 0x3f) << 1); |
| 1228 | |
| 1229 | saddend = (bfd_signed_vma) addend; |
| 1230 | |
| 1231 | if (saddend > 0x7e || saddend < 0) |
| 1232 | return bfd_reloc_overflow; |
| 1233 | |
| 1234 | if (addend & 1) |
| 1235 | return bfd_reloc_dangerous; |
| 1236 | |
| 1237 | insn &= 0xff80; |
| 1238 | insn |= (addend >> 1); |
| 1239 | break; |
| 1240 | |
| 1241 | case R_V850_GNU_VTINHERIT: |
| 1242 | case R_V850_GNU_VTENTRY: |
| 1243 | return bfd_reloc_ok; |
| 1244 | |
| 1245 | } |
| 1246 | |
| 1247 | bfd_put_16 (abfd, insn, address); |
| 1248 | return bfd_reloc_ok; |
| 1249 | } |
| 1250 | |
| 1251 | \f |
| 1252 | /* Insert the addend into the instruction. */ |
| 1253 | static bfd_reloc_status_type |
| 1254 | v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err) |
| 1255 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1256 | arelent * reloc; |
| 1257 | asymbol * symbol; |
| 1258 | PTR data ATTRIBUTE_UNUSED; |
| 1259 | asection * isection; |
| 1260 | bfd * obfd; |
| 1261 | char ** err ATTRIBUTE_UNUSED; |
| 1262 | { |
| 1263 | long relocation; |
| 1264 | |
| 1265 | /* If there is an output BFD, |
| 1266 | and the symbol is not a section name (which is only defined at final link time), |
| 1267 | and either we are not putting the addend into the instruction |
| 1268 | or the addend is zero, so there is nothing to add into the instruction |
| 1269 | then just fixup the address and return. */ |
| 1270 | if (obfd != (bfd *) NULL |
| 1271 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1272 | && (! reloc->howto->partial_inplace |
| 1273 | || reloc->addend == 0)) |
| 1274 | { |
| 1275 | reloc->address += isection->output_offset; |
| 1276 | return bfd_reloc_ok; |
| 1277 | } |
| 1278 | #if 0 |
| 1279 | else if (obfd != NULL) |
| 1280 | { |
| 1281 | return bfd_reloc_continue; |
| 1282 | } |
| 1283 | #endif |
| 1284 | |
| 1285 | /* Catch relocs involving undefined symbols. */ |
| 1286 | if (bfd_is_und_section (symbol->section) |
| 1287 | && (symbol->flags & BSF_WEAK) == 0 |
| 1288 | && obfd == NULL) |
| 1289 | return bfd_reloc_undefined; |
| 1290 | |
| 1291 | /* We handle final linking of some relocs ourselves. */ |
| 1292 | |
| 1293 | /* Is the address of the relocation really within the section? */ |
| 1294 | if (reloc->address > isection->_cooked_size) |
| 1295 | return bfd_reloc_outofrange; |
| 1296 | |
| 1297 | /* Work out which section the relocation is targetted at and the |
| 1298 | initial relocation command value. */ |
| 1299 | |
| 1300 | /* Get symbol value. (Common symbols are special.) */ |
| 1301 | if (bfd_is_com_section (symbol->section)) |
| 1302 | relocation = 0; |
| 1303 | else |
| 1304 | relocation = symbol->value; |
| 1305 | |
| 1306 | /* Convert input-section-relative symbol value to absolute + addend. */ |
| 1307 | relocation += symbol->section->output_section->vma; |
| 1308 | relocation += symbol->section->output_offset; |
| 1309 | relocation += reloc->addend; |
| 1310 | |
| 1311 | if (reloc->howto->pc_relative == true) |
| 1312 | { |
| 1313 | /* Here the variable relocation holds the final address of the |
| 1314 | symbol we are relocating against, plus any addend. */ |
| 1315 | relocation -= isection->output_section->vma + isection->output_offset; |
| 1316 | |
| 1317 | /* Deal with pcrel_offset */ |
| 1318 | relocation -= reloc->address; |
| 1319 | } |
| 1320 | |
| 1321 | reloc->addend = relocation; |
| 1322 | return bfd_reloc_ok; |
| 1323 | } |
| 1324 | |
| 1325 | \f |
| 1326 | /*ARGSUSED*/ |
| 1327 | static boolean |
| 1328 | v850_elf_is_local_label_name (abfd, name) |
| 1329 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1330 | const char * name; |
| 1331 | { |
| 1332 | return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.')) |
| 1333 | || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')); |
| 1334 | } |
| 1335 | |
| 1336 | \f |
| 1337 | /* Perform a relocation as part of a final link. */ |
| 1338 | static bfd_reloc_status_type |
| 1339 | v850_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1340 | input_section, contents, offset, value, |
| 1341 | addend, info, sym_sec, is_local) |
| 1342 | reloc_howto_type * howto; |
| 1343 | bfd * input_bfd; |
| 1344 | bfd * output_bfd ATTRIBUTE_UNUSED; |
| 1345 | asection * input_section; |
| 1346 | bfd_byte * contents; |
| 1347 | bfd_vma offset; |
| 1348 | bfd_vma value; |
| 1349 | bfd_vma addend; |
| 1350 | struct bfd_link_info * info; |
| 1351 | asection * sym_sec; |
| 1352 | int is_local ATTRIBUTE_UNUSED; |
| 1353 | { |
| 1354 | unsigned long r_type = howto->type; |
| 1355 | bfd_byte * hit_data = contents + offset; |
| 1356 | |
| 1357 | /* Adjust the value according to the relocation. */ |
| 1358 | switch (r_type) |
| 1359 | { |
| 1360 | case R_V850_9_PCREL: |
| 1361 | value -= (input_section->output_section->vma |
| 1362 | + input_section->output_offset); |
| 1363 | value -= offset; |
| 1364 | break; |
| 1365 | |
| 1366 | case R_V850_22_PCREL: |
| 1367 | value -= (input_section->output_section->vma |
| 1368 | + input_section->output_offset |
| 1369 | + offset); |
| 1370 | |
| 1371 | /* If the sign extension will corrupt the value then we have overflowed. */ |
| 1372 | if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000)) |
| 1373 | return bfd_reloc_overflow; |
| 1374 | |
| 1375 | value = SEXT24 (value); /* Only the bottom 24 bits of the PC are valid */ |
| 1376 | break; |
| 1377 | |
| 1378 | case R_V850_HI16_S: |
| 1379 | case R_V850_HI16: |
| 1380 | case R_V850_LO16: |
| 1381 | case R_V850_16: |
| 1382 | case R_V850_32: |
| 1383 | case R_V850_8: |
| 1384 | break; |
| 1385 | |
| 1386 | case R_V850_ZDA_15_16_OFFSET: |
| 1387 | case R_V850_ZDA_16_16_OFFSET: |
| 1388 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
| 1389 | if (sym_sec == NULL) |
| 1390 | return bfd_reloc_undefined; |
| 1391 | |
| 1392 | value -= sym_sec->output_section->vma; |
| 1393 | break; |
| 1394 | |
| 1395 | case R_V850_SDA_15_16_OFFSET: |
| 1396 | case R_V850_SDA_16_16_OFFSET: |
| 1397 | case R_V850_SDA_16_16_SPLIT_OFFSET: |
| 1398 | { |
| 1399 | unsigned long gp; |
| 1400 | struct bfd_link_hash_entry * h; |
| 1401 | |
| 1402 | if (sym_sec == NULL) |
| 1403 | return bfd_reloc_undefined; |
| 1404 | |
| 1405 | /* Get the value of __gp. */ |
| 1406 | h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true); |
| 1407 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1408 | || h->type != bfd_link_hash_defined) |
| 1409 | return bfd_reloc_other; |
| 1410 | |
| 1411 | gp = (h->u.def.value |
| 1412 | + h->u.def.section->output_section->vma |
| 1413 | + h->u.def.section->output_offset); |
| 1414 | |
| 1415 | value -= sym_sec->output_section->vma; |
| 1416 | value -= (gp - sym_sec->output_section->vma); |
| 1417 | } |
| 1418 | break; |
| 1419 | |
| 1420 | case R_V850_TDA_4_4_OFFSET: |
| 1421 | case R_V850_TDA_4_5_OFFSET: |
| 1422 | case R_V850_TDA_16_16_OFFSET: |
| 1423 | case R_V850_TDA_7_7_OFFSET: |
| 1424 | case R_V850_TDA_7_8_OFFSET: |
| 1425 | case R_V850_TDA_6_8_OFFSET: |
| 1426 | { |
| 1427 | unsigned long ep; |
| 1428 | struct bfd_link_hash_entry * h; |
| 1429 | |
| 1430 | /* Get the value of __ep. */ |
| 1431 | h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true); |
| 1432 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1433 | || h->type != bfd_link_hash_defined) |
| 1434 | return bfd_reloc_continue; /* Actually this indicates that __ep could not be found. */ |
| 1435 | |
| 1436 | ep = (h->u.def.value |
| 1437 | + h->u.def.section->output_section->vma |
| 1438 | + h->u.def.section->output_offset); |
| 1439 | |
| 1440 | value -= ep; |
| 1441 | } |
| 1442 | break; |
| 1443 | |
| 1444 | case R_V850_CALLT_6_7_OFFSET: |
| 1445 | { |
| 1446 | unsigned long ctbp; |
| 1447 | struct bfd_link_hash_entry * h; |
| 1448 | |
| 1449 | /* Get the value of __ctbp. */ |
| 1450 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); |
| 1451 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1452 | || h->type != bfd_link_hash_defined) |
| 1453 | return (bfd_reloc_dangerous + 1); /* Actually this indicates that __ctbp could not be found. */ |
| 1454 | |
| 1455 | ctbp = (h->u.def.value |
| 1456 | + h->u.def.section->output_section->vma |
| 1457 | + h->u.def.section->output_offset); |
| 1458 | value -= ctbp; |
| 1459 | } |
| 1460 | break; |
| 1461 | |
| 1462 | case R_V850_CALLT_16_16_OFFSET: |
| 1463 | { |
| 1464 | unsigned long ctbp; |
| 1465 | struct bfd_link_hash_entry * h; |
| 1466 | |
| 1467 | if (sym_sec == NULL) |
| 1468 | return bfd_reloc_undefined; |
| 1469 | |
| 1470 | /* Get the value of __ctbp. */ |
| 1471 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); |
| 1472 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1473 | || h->type != bfd_link_hash_defined) |
| 1474 | return (bfd_reloc_dangerous + 1); |
| 1475 | |
| 1476 | ctbp = (h->u.def.value |
| 1477 | + h->u.def.section->output_section->vma |
| 1478 | + h->u.def.section->output_offset); |
| 1479 | |
| 1480 | value -= sym_sec->output_section->vma; |
| 1481 | value -= (ctbp - sym_sec->output_section->vma); |
| 1482 | } |
| 1483 | break; |
| 1484 | |
| 1485 | case R_V850_NONE: |
| 1486 | case R_V850_GNU_VTINHERIT: |
| 1487 | case R_V850_GNU_VTENTRY: |
| 1488 | return bfd_reloc_ok; |
| 1489 | |
| 1490 | default: |
| 1491 | return bfd_reloc_notsupported; |
| 1492 | } |
| 1493 | |
| 1494 | /* Perform the relocation. */ |
| 1495 | return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data); |
| 1496 | } |
| 1497 | |
| 1498 | \f |
| 1499 | /* Relocate an V850 ELF section. */ |
| 1500 | static boolean |
| 1501 | v850_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1502 | contents, relocs, local_syms, local_sections) |
| 1503 | bfd * output_bfd; |
| 1504 | struct bfd_link_info * info; |
| 1505 | bfd * input_bfd; |
| 1506 | asection * input_section; |
| 1507 | bfd_byte * contents; |
| 1508 | Elf_Internal_Rela * relocs; |
| 1509 | Elf_Internal_Sym * local_syms; |
| 1510 | asection ** local_sections; |
| 1511 | { |
| 1512 | Elf_Internal_Shdr * symtab_hdr; |
| 1513 | struct elf_link_hash_entry ** sym_hashes; |
| 1514 | Elf_Internal_Rela * rel; |
| 1515 | Elf_Internal_Rela * relend; |
| 1516 | |
| 1517 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 1518 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1519 | |
| 1520 | if (sym_hashes == NULL) |
| 1521 | { |
| 1522 | info->callbacks->warning |
| 1523 | (info, "no hash table available", NULL, input_bfd, input_section, 0); |
| 1524 | |
| 1525 | return false; |
| 1526 | } |
| 1527 | |
| 1528 | /* Reset the list of remembered HI16S relocs to empty. */ |
| 1529 | free_hi16s = previous_hi16s; |
| 1530 | previous_hi16s = NULL; |
| 1531 | hi16s_counter = 0; |
| 1532 | |
| 1533 | rel = relocs; |
| 1534 | relend = relocs + input_section->reloc_count; |
| 1535 | for (; rel < relend; rel++) |
| 1536 | { |
| 1537 | int r_type; |
| 1538 | reloc_howto_type * howto; |
| 1539 | unsigned long r_symndx; |
| 1540 | Elf_Internal_Sym * sym; |
| 1541 | asection * sec; |
| 1542 | struct elf_link_hash_entry * h; |
| 1543 | bfd_vma relocation; |
| 1544 | bfd_reloc_status_type r; |
| 1545 | |
| 1546 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1547 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1548 | |
| 1549 | if (r_type == R_V850_GNU_VTENTRY |
| 1550 | || r_type == R_V850_GNU_VTINHERIT) |
| 1551 | continue; |
| 1552 | |
| 1553 | howto = v850_elf_howto_table + r_type; |
| 1554 | |
| 1555 | if (info->relocateable) |
| 1556 | { |
| 1557 | /* This is a relocateable link. We don't have to change |
| 1558 | anything, unless the reloc is against a section symbol, |
| 1559 | in which case we have to adjust according to where the |
| 1560 | section symbol winds up in the output section. */ |
| 1561 | if (r_symndx < symtab_hdr->sh_info) |
| 1562 | { |
| 1563 | sym = local_syms + r_symndx; |
| 1564 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 1565 | { |
| 1566 | sec = local_sections[r_symndx]; |
| 1567 | rel->r_addend += sec->output_offset + sym->st_value; |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | continue; |
| 1572 | } |
| 1573 | |
| 1574 | /* This is a final link. */ |
| 1575 | h = NULL; |
| 1576 | sym = NULL; |
| 1577 | sec = NULL; |
| 1578 | if (r_symndx < symtab_hdr->sh_info) |
| 1579 | { |
| 1580 | sym = local_syms + r_symndx; |
| 1581 | sec = local_sections[r_symndx]; |
| 1582 | relocation = (sec->output_section->vma |
| 1583 | + sec->output_offset |
| 1584 | + sym->st_value); |
| 1585 | #if 0 |
| 1586 | { |
| 1587 | char * name; |
| 1588 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 1589 | name = (name == NULL) ? "<none>" : name; |
| 1590 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", |
| 1591 | sec->name, name, sym->st_name, |
| 1592 | sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend); |
| 1593 | } |
| 1594 | #endif |
| 1595 | } |
| 1596 | else |
| 1597 | { |
| 1598 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1599 | |
| 1600 | while (h->root.type == bfd_link_hash_indirect |
| 1601 | || h->root.type == bfd_link_hash_warning) |
| 1602 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1603 | |
| 1604 | if (h->root.type == bfd_link_hash_defined |
| 1605 | || h->root.type == bfd_link_hash_defweak) |
| 1606 | { |
| 1607 | sec = h->root.u.def.section; |
| 1608 | relocation = (h->root.u.def.value |
| 1609 | + sec->output_section->vma |
| 1610 | + sec->output_offset); |
| 1611 | #if 0 |
| 1612 | fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", |
| 1613 | sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation); |
| 1614 | #endif |
| 1615 | } |
| 1616 | else if (h->root.type == bfd_link_hash_undefweak) |
| 1617 | { |
| 1618 | #if 0 |
| 1619 | fprintf (stderr, "undefined: sec: %s, name: %s\n", |
| 1620 | sec->name, h->root.root.string); |
| 1621 | #endif |
| 1622 | relocation = 0; |
| 1623 | } |
| 1624 | else |
| 1625 | { |
| 1626 | if (! ((*info->callbacks->undefined_symbol) |
| 1627 | (info, h->root.root.string, input_bfd, |
| 1628 | input_section, rel->r_offset, true))) |
| 1629 | return false; |
| 1630 | #if 0 |
| 1631 | fprintf (stderr, "unknown: name: %s\n", h->root.root.string); |
| 1632 | #endif |
| 1633 | relocation = 0; |
| 1634 | } |
| 1635 | } |
| 1636 | |
| 1637 | /* FIXME: We should use the addend, but the COFF relocations |
| 1638 | don't. */ |
| 1639 | r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1640 | input_section, |
| 1641 | contents, rel->r_offset, |
| 1642 | relocation, rel->r_addend, |
| 1643 | info, sec, h == NULL); |
| 1644 | |
| 1645 | if (r != bfd_reloc_ok) |
| 1646 | { |
| 1647 | const char * name; |
| 1648 | const char * msg = (const char *)0; |
| 1649 | |
| 1650 | if (h != NULL) |
| 1651 | name = h->root.root.string; |
| 1652 | else |
| 1653 | { |
| 1654 | name = (bfd_elf_string_from_elf_section |
| 1655 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1656 | if (name == NULL || *name == '\0') |
| 1657 | name = bfd_section_name (input_bfd, sec); |
| 1658 | } |
| 1659 | |
| 1660 | switch (r) |
| 1661 | { |
| 1662 | case bfd_reloc_overflow: |
| 1663 | if (! ((*info->callbacks->reloc_overflow) |
| 1664 | (info, name, howto->name, (bfd_vma) 0, |
| 1665 | input_bfd, input_section, rel->r_offset))) |
| 1666 | return false; |
| 1667 | break; |
| 1668 | |
| 1669 | case bfd_reloc_undefined: |
| 1670 | if (! ((*info->callbacks->undefined_symbol) |
| 1671 | (info, name, input_bfd, input_section, |
| 1672 | rel->r_offset, true))) |
| 1673 | return false; |
| 1674 | break; |
| 1675 | |
| 1676 | case bfd_reloc_outofrange: |
| 1677 | msg = _("internal error: out of range error"); |
| 1678 | goto common_error; |
| 1679 | |
| 1680 | case bfd_reloc_notsupported: |
| 1681 | msg = _("internal error: unsupported relocation error"); |
| 1682 | goto common_error; |
| 1683 | |
| 1684 | case bfd_reloc_dangerous: |
| 1685 | msg = _("internal error: dangerous relocation"); |
| 1686 | goto common_error; |
| 1687 | |
| 1688 | case bfd_reloc_other: |
| 1689 | msg = _("could not locate special linker symbol __gp"); |
| 1690 | goto common_error; |
| 1691 | |
| 1692 | case bfd_reloc_continue: |
| 1693 | msg = _("could not locate special linker symbol __ep"); |
| 1694 | goto common_error; |
| 1695 | |
| 1696 | case (bfd_reloc_dangerous + 1): |
| 1697 | msg = _("could not locate special linker symbol __ctbp"); |
| 1698 | goto common_error; |
| 1699 | |
| 1700 | default: |
| 1701 | msg = _("internal error: unknown error"); |
| 1702 | /* fall through */ |
| 1703 | |
| 1704 | common_error: |
| 1705 | if (!((*info->callbacks->warning) |
| 1706 | (info, msg, name, input_bfd, input_section, |
| 1707 | rel->r_offset))) |
| 1708 | return false; |
| 1709 | break; |
| 1710 | } |
| 1711 | } |
| 1712 | } |
| 1713 | |
| 1714 | return true; |
| 1715 | } |
| 1716 | |
| 1717 | static boolean |
| 1718 | v850_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| 1719 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1720 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1721 | asection *sec ATTRIBUTE_UNUSED; |
| 1722 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; |
| 1723 | { |
| 1724 | /* No got and plt entries for v850-elf */ |
| 1725 | return true; |
| 1726 | } |
| 1727 | |
| 1728 | static asection * |
| 1729 | v850_elf_gc_mark_hook (abfd, info, rel, h, sym) |
| 1730 | bfd *abfd; |
| 1731 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1732 | Elf_Internal_Rela *rel; |
| 1733 | struct elf_link_hash_entry *h; |
| 1734 | Elf_Internal_Sym *sym; |
| 1735 | { |
| 1736 | if (h != NULL) |
| 1737 | { |
| 1738 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1739 | { |
| 1740 | case R_V850_GNU_VTINHERIT: |
| 1741 | case R_V850_GNU_VTENTRY: |
| 1742 | break; |
| 1743 | |
| 1744 | default: |
| 1745 | switch (h->root.type) |
| 1746 | { |
| 1747 | case bfd_link_hash_defined: |
| 1748 | case bfd_link_hash_defweak: |
| 1749 | return h->root.u.def.section; |
| 1750 | |
| 1751 | case bfd_link_hash_common: |
| 1752 | return h->root.u.c.p->section; |
| 1753 | |
| 1754 | default: |
| 1755 | break; |
| 1756 | } |
| 1757 | } |
| 1758 | } |
| 1759 | else |
| 1760 | { |
| 1761 | if (!(elf_bad_symtab (abfd) |
| 1762 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| 1763 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| 1764 | && sym->st_shndx != SHN_COMMON)) |
| 1765 | { |
| 1766 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| 1767 | } |
| 1768 | } |
| 1769 | return NULL; |
| 1770 | } |
| 1771 | /* Set the right machine number. */ |
| 1772 | static boolean |
| 1773 | v850_elf_object_p (abfd) |
| 1774 | bfd *abfd; |
| 1775 | { |
| 1776 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) |
| 1777 | { |
| 1778 | default: |
| 1779 | case E_V850_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, 0); break; |
| 1780 | case E_V850E_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e); break; |
| 1781 | case E_V850EA_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850ea); break; |
| 1782 | } |
| 1783 | return true; |
| 1784 | } |
| 1785 | |
| 1786 | /* Store the machine number in the flags field. */ |
| 1787 | static void |
| 1788 | v850_elf_final_write_processing (abfd, linker) |
| 1789 | bfd * abfd; |
| 1790 | boolean linker ATTRIBUTE_UNUSED; |
| 1791 | { |
| 1792 | unsigned long val; |
| 1793 | |
| 1794 | switch (bfd_get_mach (abfd)) |
| 1795 | { |
| 1796 | default: |
| 1797 | case 0: val = E_V850_ARCH; break; |
| 1798 | case bfd_mach_v850e: val = E_V850E_ARCH; break; |
| 1799 | case bfd_mach_v850ea: val = E_V850EA_ARCH; break; |
| 1800 | } |
| 1801 | |
| 1802 | elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH; |
| 1803 | elf_elfheader (abfd)->e_flags |= val; |
| 1804 | } |
| 1805 | |
| 1806 | /* Function to keep V850 specific file flags. */ |
| 1807 | static boolean |
| 1808 | v850_elf_set_private_flags (abfd, flags) |
| 1809 | bfd * abfd; |
| 1810 | flagword flags; |
| 1811 | { |
| 1812 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1813 | || elf_elfheader (abfd)->e_flags == flags); |
| 1814 | |
| 1815 | elf_elfheader (abfd)->e_flags = flags; |
| 1816 | elf_flags_init (abfd) = true; |
| 1817 | return true; |
| 1818 | } |
| 1819 | |
| 1820 | /* Copy backend specific data from one object module to another */ |
| 1821 | static boolean |
| 1822 | v850_elf_copy_private_bfd_data (ibfd, obfd) |
| 1823 | bfd * ibfd; |
| 1824 | bfd * obfd; |
| 1825 | { |
| 1826 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1827 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1828 | return true; |
| 1829 | |
| 1830 | BFD_ASSERT (!elf_flags_init (obfd) |
| 1831 | || (elf_elfheader (obfd)->e_flags |
| 1832 | == elf_elfheader (ibfd)->e_flags)); |
| 1833 | |
| 1834 | elf_gp (obfd) = elf_gp (ibfd); |
| 1835 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 1836 | elf_flags_init (obfd) = true; |
| 1837 | return true; |
| 1838 | } |
| 1839 | |
| 1840 | /* Merge backend specific data from an object file to the output |
| 1841 | object file when linking. */ |
| 1842 | static boolean |
| 1843 | v850_elf_merge_private_bfd_data (ibfd, obfd) |
| 1844 | bfd * ibfd; |
| 1845 | bfd * obfd; |
| 1846 | { |
| 1847 | flagword out_flags; |
| 1848 | flagword in_flags; |
| 1849 | |
| 1850 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1851 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1852 | return true; |
| 1853 | |
| 1854 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 1855 | out_flags = elf_elfheader (obfd)->e_flags; |
| 1856 | |
| 1857 | if (! elf_flags_init (obfd)) |
| 1858 | { |
| 1859 | /* If the input is the default architecture then do not |
| 1860 | bother setting the flags for the output architecture, |
| 1861 | instead allow future merges to do this. If no future |
| 1862 | merges ever set these flags then they will retain their |
| 1863 | unitialised values, which surprise surprise, correspond |
| 1864 | to the default values. */ |
| 1865 | if (bfd_get_arch_info (ibfd)->the_default) |
| 1866 | return true; |
| 1867 | |
| 1868 | elf_flags_init (obfd) = true; |
| 1869 | elf_elfheader (obfd)->e_flags = in_flags; |
| 1870 | |
| 1871 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 1872 | && bfd_get_arch_info (obfd)->the_default) |
| 1873 | { |
| 1874 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| 1875 | } |
| 1876 | |
| 1877 | return true; |
| 1878 | } |
| 1879 | |
| 1880 | /* Check flag compatibility. */ |
| 1881 | if (in_flags == out_flags) |
| 1882 | return true; |
| 1883 | |
| 1884 | if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH) |
| 1885 | && (in_flags & EF_V850_ARCH) != E_V850_ARCH) |
| 1886 | _bfd_error_handler (_("%s: Architecture mismatch with previous modules"), |
| 1887 | bfd_get_filename (ibfd)); |
| 1888 | |
| 1889 | return true; |
| 1890 | } |
| 1891 | /* Display the flags field */ |
| 1892 | |
| 1893 | static boolean |
| 1894 | v850_elf_print_private_bfd_data (abfd, ptr) |
| 1895 | bfd * abfd; |
| 1896 | PTR ptr; |
| 1897 | { |
| 1898 | FILE * file = (FILE *) ptr; |
| 1899 | |
| 1900 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 1901 | |
| 1902 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 1903 | |
| 1904 | /* xgettext:c-format */ |
| 1905 | fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags); |
| 1906 | |
| 1907 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) |
| 1908 | { |
| 1909 | default: |
| 1910 | case E_V850_ARCH: fprintf (file, _("v850 architecture")); break; |
| 1911 | case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break; |
| 1912 | case E_V850EA_ARCH: fprintf (file, _("v850ea architecture")); break; |
| 1913 | } |
| 1914 | |
| 1915 | fputc ('\n', file); |
| 1916 | |
| 1917 | return true; |
| 1918 | } |
| 1919 | |
| 1920 | /* V850 ELF uses four common sections. One is the usual one, and the |
| 1921 | others are for (small) objects in one of the special data areas: |
| 1922 | small, tiny and zero. All the objects are kept together, and then |
| 1923 | referenced via the gp register, the ep register or the r0 register |
| 1924 | respectively, which yields smaller, faster assembler code. This |
| 1925 | approach is copied from elf32-mips.c. */ |
| 1926 | |
| 1927 | static asection v850_elf_scom_section; |
| 1928 | static asymbol v850_elf_scom_symbol; |
| 1929 | static asymbol * v850_elf_scom_symbol_ptr; |
| 1930 | static asection v850_elf_tcom_section; |
| 1931 | static asymbol v850_elf_tcom_symbol; |
| 1932 | static asymbol * v850_elf_tcom_symbol_ptr; |
| 1933 | static asection v850_elf_zcom_section; |
| 1934 | static asymbol v850_elf_zcom_symbol; |
| 1935 | static asymbol * v850_elf_zcom_symbol_ptr; |
| 1936 | |
| 1937 | |
| 1938 | /* Given a BFD section, try to locate the corresponding ELF section |
| 1939 | index. */ |
| 1940 | |
| 1941 | static boolean |
| 1942 | v850_elf_section_from_bfd_section (abfd, hdr, sec, retval) |
| 1943 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1944 | Elf32_Internal_Shdr * hdr ATTRIBUTE_UNUSED; |
| 1945 | asection * sec; |
| 1946 | int * retval; |
| 1947 | { |
| 1948 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) |
| 1949 | *retval = SHN_V850_SCOMMON; |
| 1950 | else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0) |
| 1951 | *retval = SHN_V850_TCOMMON; |
| 1952 | else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0) |
| 1953 | *retval = SHN_V850_ZCOMMON; |
| 1954 | else |
| 1955 | return false; |
| 1956 | |
| 1957 | return true; |
| 1958 | } |
| 1959 | |
| 1960 | /* Handle the special V850 section numbers that a symbol may use. */ |
| 1961 | |
| 1962 | static void |
| 1963 | v850_elf_symbol_processing (abfd, asym) |
| 1964 | bfd * abfd; |
| 1965 | asymbol * asym; |
| 1966 | { |
| 1967 | elf_symbol_type * elfsym = (elf_symbol_type *) asym; |
| 1968 | unsigned short index; |
| 1969 | |
| 1970 | index = elfsym->internal_elf_sym.st_shndx; |
| 1971 | |
| 1972 | /* If the section index is an "ordinary" index, then it may |
| 1973 | refer to a v850 specific section created by the assembler. |
| 1974 | Check the section's type and change the index it matches. |
| 1975 | |
| 1976 | FIXME: Should we alter the st_shndx field as well ? */ |
| 1977 | |
| 1978 | if (index < elf_elfheader(abfd)[0].e_shnum) |
| 1979 | switch (elf_elfsections(abfd)[index]->sh_type) |
| 1980 | { |
| 1981 | case SHT_V850_SCOMMON: |
| 1982 | index = SHN_V850_SCOMMON; |
| 1983 | break; |
| 1984 | |
| 1985 | case SHT_V850_TCOMMON: |
| 1986 | index = SHN_V850_TCOMMON; |
| 1987 | break; |
| 1988 | |
| 1989 | case SHT_V850_ZCOMMON: |
| 1990 | index = SHN_V850_ZCOMMON; |
| 1991 | break; |
| 1992 | |
| 1993 | default: |
| 1994 | break; |
| 1995 | } |
| 1996 | |
| 1997 | switch (index) |
| 1998 | { |
| 1999 | case SHN_V850_SCOMMON: |
| 2000 | if (v850_elf_scom_section.name == NULL) |
| 2001 | { |
| 2002 | /* Initialize the small common section. */ |
| 2003 | v850_elf_scom_section.name = ".scommon"; |
| 2004 | v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA; |
| 2005 | v850_elf_scom_section.output_section = & v850_elf_scom_section; |
| 2006 | v850_elf_scom_section.symbol = & v850_elf_scom_symbol; |
| 2007 | v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr; |
| 2008 | v850_elf_scom_symbol.name = ".scommon"; |
| 2009 | v850_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| 2010 | v850_elf_scom_symbol.section = & v850_elf_scom_section; |
| 2011 | v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol; |
| 2012 | } |
| 2013 | asym->section = & v850_elf_scom_section; |
| 2014 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2015 | break; |
| 2016 | |
| 2017 | case SHN_V850_TCOMMON: |
| 2018 | if (v850_elf_tcom_section.name == NULL) |
| 2019 | { |
| 2020 | /* Initialize the tcommon section. */ |
| 2021 | v850_elf_tcom_section.name = ".tcommon"; |
| 2022 | v850_elf_tcom_section.flags = SEC_IS_COMMON; |
| 2023 | v850_elf_tcom_section.output_section = & v850_elf_tcom_section; |
| 2024 | v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol; |
| 2025 | v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr; |
| 2026 | v850_elf_tcom_symbol.name = ".tcommon"; |
| 2027 | v850_elf_tcom_symbol.flags = BSF_SECTION_SYM; |
| 2028 | v850_elf_tcom_symbol.section = & v850_elf_tcom_section; |
| 2029 | v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol; |
| 2030 | } |
| 2031 | asym->section = & v850_elf_tcom_section; |
| 2032 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2033 | break; |
| 2034 | |
| 2035 | case SHN_V850_ZCOMMON: |
| 2036 | if (v850_elf_zcom_section.name == NULL) |
| 2037 | { |
| 2038 | /* Initialize the zcommon section. */ |
| 2039 | v850_elf_zcom_section.name = ".zcommon"; |
| 2040 | v850_elf_zcom_section.flags = SEC_IS_COMMON; |
| 2041 | v850_elf_zcom_section.output_section = & v850_elf_zcom_section; |
| 2042 | v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol; |
| 2043 | v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr; |
| 2044 | v850_elf_zcom_symbol.name = ".zcommon"; |
| 2045 | v850_elf_zcom_symbol.flags = BSF_SECTION_SYM; |
| 2046 | v850_elf_zcom_symbol.section = & v850_elf_zcom_section; |
| 2047 | v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol; |
| 2048 | } |
| 2049 | asym->section = & v850_elf_zcom_section; |
| 2050 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2051 | break; |
| 2052 | } |
| 2053 | } |
| 2054 | |
| 2055 | /* Hook called by the linker routine which adds symbols from an object |
| 2056 | file. We must handle the special v850 section numbers here. */ |
| 2057 | |
| 2058 | /*ARGSUSED*/ |
| 2059 | static boolean |
| 2060 | v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 2061 | bfd * abfd; |
| 2062 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
| 2063 | const Elf_Internal_Sym * sym; |
| 2064 | const char ** namep ATTRIBUTE_UNUSED; |
| 2065 | flagword * flagsp ATTRIBUTE_UNUSED; |
| 2066 | asection ** secp; |
| 2067 | bfd_vma * valp; |
| 2068 | { |
| 2069 | int index = sym->st_shndx; |
| 2070 | |
| 2071 | /* If the section index is an "ordinary" index, then it may |
| 2072 | refer to a v850 specific section created by the assembler. |
| 2073 | Check the section's type and change the index it matches. |
| 2074 | |
| 2075 | FIXME: Should we alter the st_shndx field as well ? */ |
| 2076 | |
| 2077 | if (index < elf_elfheader(abfd)[0].e_shnum) |
| 2078 | switch (elf_elfsections(abfd)[index]->sh_type) |
| 2079 | { |
| 2080 | case SHT_V850_SCOMMON: |
| 2081 | index = SHN_V850_SCOMMON; |
| 2082 | break; |
| 2083 | |
| 2084 | case SHT_V850_TCOMMON: |
| 2085 | index = SHN_V850_TCOMMON; |
| 2086 | break; |
| 2087 | |
| 2088 | case SHT_V850_ZCOMMON: |
| 2089 | index = SHN_V850_ZCOMMON; |
| 2090 | break; |
| 2091 | |
| 2092 | default: |
| 2093 | break; |
| 2094 | } |
| 2095 | |
| 2096 | switch (index) |
| 2097 | { |
| 2098 | case SHN_V850_SCOMMON: |
| 2099 | *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| 2100 | (*secp)->flags |= SEC_IS_COMMON; |
| 2101 | *valp = sym->st_size; |
| 2102 | break; |
| 2103 | |
| 2104 | case SHN_V850_TCOMMON: |
| 2105 | *secp = bfd_make_section_old_way (abfd, ".tcommon"); |
| 2106 | (*secp)->flags |= SEC_IS_COMMON; |
| 2107 | *valp = sym->st_size; |
| 2108 | break; |
| 2109 | |
| 2110 | case SHN_V850_ZCOMMON: |
| 2111 | *secp = bfd_make_section_old_way (abfd, ".zcommon"); |
| 2112 | (*secp)->flags |= SEC_IS_COMMON; |
| 2113 | *valp = sym->st_size; |
| 2114 | break; |
| 2115 | } |
| 2116 | |
| 2117 | return true; |
| 2118 | } |
| 2119 | |
| 2120 | /*ARGSIGNORED*/ |
| 2121 | static boolean |
| 2122 | v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec) |
| 2123 | bfd * abfd ATTRIBUTE_UNUSED; |
| 2124 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
| 2125 | const char * name ATTRIBUTE_UNUSED; |
| 2126 | Elf_Internal_Sym * sym; |
| 2127 | asection * input_sec; |
| 2128 | { |
| 2129 | /* If we see a common symbol, which implies a relocatable link, then |
| 2130 | if a symbol was in a special common section in an input file, mark |
| 2131 | it as a special common in the output file. */ |
| 2132 | |
| 2133 | if (sym->st_shndx == SHN_COMMON) |
| 2134 | { |
| 2135 | if (strcmp (input_sec->name, ".scommon") == 0) |
| 2136 | sym->st_shndx = SHN_V850_SCOMMON; |
| 2137 | else if (strcmp (input_sec->name, ".tcommon") == 0) |
| 2138 | sym->st_shndx = SHN_V850_TCOMMON; |
| 2139 | else if (strcmp (input_sec->name, ".zcommon") == 0) |
| 2140 | sym->st_shndx = SHN_V850_ZCOMMON; |
| 2141 | } |
| 2142 | |
| 2143 | return true; |
| 2144 | } |
| 2145 | |
| 2146 | static boolean |
| 2147 | v850_elf_section_from_shdr (abfd, hdr, name) |
| 2148 | bfd * abfd; |
| 2149 | Elf_Internal_Shdr * hdr; |
| 2150 | char * name; |
| 2151 | { |
| 2152 | /* There ought to be a place to keep ELF backend specific flags, but |
| 2153 | at the moment there isn't one. We just keep track of the |
| 2154 | sections by their name, instead. */ |
| 2155 | |
| 2156 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 2157 | return false; |
| 2158 | |
| 2159 | switch (hdr->sh_type) |
| 2160 | { |
| 2161 | case SHT_V850_SCOMMON: |
| 2162 | case SHT_V850_TCOMMON: |
| 2163 | case SHT_V850_ZCOMMON: |
| 2164 | if (! bfd_set_section_flags (abfd, hdr->bfd_section, |
| 2165 | (bfd_get_section_flags (abfd, |
| 2166 | hdr->bfd_section) |
| 2167 | | SEC_IS_COMMON))) |
| 2168 | return false; |
| 2169 | } |
| 2170 | |
| 2171 | return true; |
| 2172 | } |
| 2173 | |
| 2174 | /* Set the correct type for a V850 ELF section. We do this by the |
| 2175 | section name, which is a hack, but ought to work. */ |
| 2176 | static boolean |
| 2177 | v850_elf_fake_sections (abfd, hdr, sec) |
| 2178 | bfd * abfd ATTRIBUTE_UNUSED; |
| 2179 | Elf32_Internal_Shdr * hdr; |
| 2180 | asection * sec; |
| 2181 | { |
| 2182 | register const char * name; |
| 2183 | |
| 2184 | name = bfd_get_section_name (abfd, sec); |
| 2185 | |
| 2186 | if (strcmp (name, ".scommon") == 0) |
| 2187 | { |
| 2188 | hdr->sh_type = SHT_V850_SCOMMON; |
| 2189 | } |
| 2190 | else if (strcmp (name, ".tcommon") == 0) |
| 2191 | { |
| 2192 | hdr->sh_type = SHT_V850_TCOMMON; |
| 2193 | } |
| 2194 | else if (strcmp (name, ".zcommon") == 0) |
| 2195 | hdr->sh_type = SHT_V850_ZCOMMON; |
| 2196 | |
| 2197 | return true; |
| 2198 | } |
| 2199 | |
| 2200 | |
| 2201 | \f |
| 2202 | #define TARGET_LITTLE_SYM bfd_elf32_v850_vec |
| 2203 | #define TARGET_LITTLE_NAME "elf32-v850" |
| 2204 | #define ELF_ARCH bfd_arch_v850 |
| 2205 | #define ELF_MACHINE_CODE EM_CYGNUS_V850 |
| 2206 | #define ELF_MAXPAGESIZE 0x1000 |
| 2207 | |
| 2208 | #define elf_info_to_howto v850_elf_info_to_howto_rela |
| 2209 | #define elf_info_to_howto_rel v850_elf_info_to_howto_rel |
| 2210 | |
| 2211 | #define elf_backend_check_relocs v850_elf_check_relocs |
| 2212 | #define elf_backend_relocate_section v850_elf_relocate_section |
| 2213 | #define elf_backend_object_p v850_elf_object_p |
| 2214 | #define elf_backend_final_write_processing v850_elf_final_write_processing |
| 2215 | #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section |
| 2216 | #define elf_backend_symbol_processing v850_elf_symbol_processing |
| 2217 | #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook |
| 2218 | #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook |
| 2219 | #define elf_backend_section_from_shdr v850_elf_section_from_shdr |
| 2220 | #define elf_backend_fake_sections v850_elf_fake_sections |
| 2221 | #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook |
| 2222 | #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook |
| 2223 | |
| 2224 | #define elf_backend_can_gc_sections 1 |
| 2225 | |
| 2226 | |
| 2227 | #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name |
| 2228 | #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup |
| 2229 | #define bfd_elf32_bfd_copy_private_bfd_data v850_elf_copy_private_bfd_data |
| 2230 | #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data |
| 2231 | #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags |
| 2232 | #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data |
| 2233 | |
| 2234 | #define elf_symbol_leading_char '_' |
| 2235 | |
| 2236 | #include "elf32-target.h" |