| 1 | /* V850-specific support for 32-bit ELF |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 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. |
| 11 | |
| 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. |
| 16 | |
| 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. */ |
| 20 | |
| 21 | /* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char |
| 22 | dependencies. As is the gas & simulator code for the v850. */ |
| 23 | |
| 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" |
| 30 | #include "libiberty.h" |
| 31 | |
| 32 | /* Sign-extend a 24-bit number. */ |
| 33 | #define SEXT24(x) ((((x) & 0xffffff) ^ 0x800000) - 0x800000) |
| 34 | |
| 35 | static reloc_howto_type *v850_elf_reloc_type_lookup |
| 36 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 37 | static void v850_elf_info_to_howto_rel |
| 38 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
| 39 | static void v850_elf_info_to_howto_rela |
| 40 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); |
| 41 | static bfd_reloc_status_type v850_elf_reloc |
| 42 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 43 | static boolean v850_elf_is_local_label_name |
| 44 | PARAMS ((bfd *, const char *)); |
| 45 | static boolean v850_elf_relocate_section |
| 46 | PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 47 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 48 | static bfd_reloc_status_type v850_elf_perform_relocation |
| 49 | PARAMS ((bfd *, unsigned int, bfd_vma, bfd_byte *)); |
| 50 | static boolean v850_elf_check_relocs |
| 51 | PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); |
| 52 | static void remember_hi16s_reloc |
| 53 | PARAMS ((bfd *, bfd_vma, bfd_byte *)); |
| 54 | static bfd_byte * find_remembered_hi16s_reloc |
| 55 | PARAMS ((bfd_vma, boolean *)); |
| 56 | static 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)); |
| 59 | static boolean v850_elf_object_p |
| 60 | PARAMS ((bfd *)); |
| 61 | static boolean v850_elf_fake_sections |
| 62 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); |
| 63 | static void v850_elf_final_write_processing |
| 64 | PARAMS ((bfd *, boolean)); |
| 65 | static boolean v850_elf_set_private_flags |
| 66 | PARAMS ((bfd *, flagword)); |
| 67 | static boolean v850_elf_merge_private_bfd_data |
| 68 | PARAMS ((bfd *, bfd *)); |
| 69 | static boolean v850_elf_print_private_bfd_data |
| 70 | PARAMS ((bfd *, PTR)); |
| 71 | static boolean v850_elf_section_from_bfd_section |
| 72 | PARAMS ((bfd *, asection *, int *)); |
| 73 | static void v850_elf_symbol_processing |
| 74 | PARAMS ((bfd *, asymbol *)); |
| 75 | static boolean v850_elf_add_symbol_hook |
| 76 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 77 | const char **, flagword *, asection **, bfd_vma *)); |
| 78 | static boolean v850_elf_link_output_symbol_hook |
| 79 | PARAMS ((bfd *, struct bfd_link_info *, const char *, |
| 80 | Elf_Internal_Sym *, asection *)); |
| 81 | static boolean v850_elf_section_from_shdr |
| 82 | PARAMS ((bfd *, Elf_Internal_Shdr *, const char *)); |
| 83 | static boolean v850_elf_gc_sweep_hook |
| 84 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 85 | const Elf_Internal_Rela *)); |
| 86 | static asection * v850_elf_gc_mark_hook |
| 87 | PARAMS ((asection *, struct bfd_link_info *, |
| 88 | Elf_Internal_Rela *, struct elf_link_hash_entry *, |
| 89 | Elf_Internal_Sym *)); |
| 90 | static bfd_reloc_status_type v850_elf_ignore_reloc |
| 91 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 92 | static boolean v850_elf_relax_delete_bytes |
| 93 | PARAMS ((bfd *, asection *, bfd_vma, bfd_vma, int)); |
| 94 | static boolean v850_elf_relax_section |
| 95 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); |
| 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. */ |
| 99 | static 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 */ |
| 106 | false, /* pc_relative */ |
| 107 | 0, /* bitpos */ |
| 108 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 109 | bfd_elf_generic_reloc, /* special_function */ |
| 110 | "R_V850_NONE", /* name */ |
| 111 | false, /* partial_inplace */ |
| 112 | 0, /* src_mask */ |
| 113 | 0, /* dst_mask */ |
| 114 | false), /* pcrel_offset */ |
| 115 | |
| 116 | /* A PC relative 9 bit branch. */ |
| 117 | HOWTO (R_V850_9_PCREL, /* type */ |
| 118 | 2, /* rightshift */ |
| 119 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 120 | 26, /* bitsize */ |
| 121 | true, /* pc_relative */ |
| 122 | 0, /* bitpos */ |
| 123 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 124 | v850_elf_reloc, /* special_function */ |
| 125 | "R_V850_9_PCREL", /* name */ |
| 126 | false, /* partial_inplace */ |
| 127 | 0x00ffffff, /* src_mask */ |
| 128 | 0x00ffffff, /* dst_mask */ |
| 129 | true), /* pcrel_offset */ |
| 130 | |
| 131 | /* A PC relative 22 bit branch. */ |
| 132 | HOWTO (R_V850_22_PCREL, /* type */ |
| 133 | 2, /* rightshift */ |
| 134 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 135 | 22, /* bitsize */ |
| 136 | true, /* pc_relative */ |
| 137 | 7, /* bitpos */ |
| 138 | complain_overflow_signed, /* complain_on_overflow */ |
| 139 | v850_elf_reloc, /* special_function */ |
| 140 | "R_V850_22_PCREL", /* name */ |
| 141 | false, /* partial_inplace */ |
| 142 | 0x07ffff80, /* src_mask */ |
| 143 | 0x07ffff80, /* dst_mask */ |
| 144 | true), /* pcrel_offset */ |
| 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 */ |
| 151 | false, /* pc_relative */ |
| 152 | 0, /* bitpos */ |
| 153 | complain_overflow_dont, /* complain_on_overflow */ |
| 154 | v850_elf_reloc, /* special_function */ |
| 155 | "R_V850_HI16_S", /* name */ |
| 156 | false, /* partial_inplace */ |
| 157 | 0xffff, /* src_mask */ |
| 158 | 0xffff, /* dst_mask */ |
| 159 | false), /* pcrel_offset */ |
| 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 */ |
| 166 | false, /* pc_relative */ |
| 167 | 0, /* bitpos */ |
| 168 | complain_overflow_dont, /* complain_on_overflow */ |
| 169 | v850_elf_reloc, /* special_function */ |
| 170 | "R_V850_HI16", /* name */ |
| 171 | false, /* partial_inplace */ |
| 172 | 0xffff, /* src_mask */ |
| 173 | 0xffff, /* dst_mask */ |
| 174 | false), /* pcrel_offset */ |
| 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 */ |
| 181 | false, /* pc_relative */ |
| 182 | 0, /* bitpos */ |
| 183 | complain_overflow_dont, /* complain_on_overflow */ |
| 184 | v850_elf_reloc, /* special_function */ |
| 185 | "R_V850_LO16", /* name */ |
| 186 | false, /* partial_inplace */ |
| 187 | 0xffff, /* src_mask */ |
| 188 | 0xffff, /* dst_mask */ |
| 189 | false), /* pcrel_offset */ |
| 190 | |
| 191 | /* Simple 32bit reloc. */ |
| 192 | HOWTO (R_V850_32, /* type */ |
| 193 | 0, /* rightshift */ |
| 194 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 195 | 32, /* bitsize */ |
| 196 | false, /* pc_relative */ |
| 197 | 0, /* bitpos */ |
| 198 | complain_overflow_dont, /* complain_on_overflow */ |
| 199 | v850_elf_reloc, /* special_function */ |
| 200 | "R_V850_32", /* name */ |
| 201 | false, /* partial_inplace */ |
| 202 | 0xffffffff, /* src_mask */ |
| 203 | 0xffffffff, /* dst_mask */ |
| 204 | false), /* pcrel_offset */ |
| 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 */ |
| 211 | false, /* pc_relative */ |
| 212 | 0, /* bitpos */ |
| 213 | complain_overflow_dont, /* complain_on_overflow */ |
| 214 | bfd_elf_generic_reloc, /* special_function */ |
| 215 | "R_V850_16", /* name */ |
| 216 | false, /* partial_inplace */ |
| 217 | 0xffff, /* src_mask */ |
| 218 | 0xffff, /* dst_mask */ |
| 219 | false), /* pcrel_offset */ |
| 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 */ |
| 226 | false, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_dont, /* complain_on_overflow */ |
| 229 | bfd_elf_generic_reloc, /* special_function */ |
| 230 | "R_V850_8", /* name */ |
| 231 | false, /* partial_inplace */ |
| 232 | 0xff, /* src_mask */ |
| 233 | 0xff, /* dst_mask */ |
| 234 | false), /* pcrel_offset */ |
| 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 */ |
| 241 | false, /* pc_relative */ |
| 242 | 0, /* bitpos */ |
| 243 | complain_overflow_dont, /* complain_on_overflow */ |
| 244 | v850_elf_reloc, /* special_function */ |
| 245 | "R_V850_SDA_16_16_OFFSET", /* name */ |
| 246 | false, /* partial_inplace */ |
| 247 | 0xffff, /* src_mask */ |
| 248 | 0xffff, /* dst_mask */ |
| 249 | false), /* pcrel_offset */ |
| 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 */ |
| 256 | false, /* pc_relative */ |
| 257 | 1, /* bitpos */ |
| 258 | complain_overflow_dont, /* complain_on_overflow */ |
| 259 | v850_elf_reloc, /* special_function */ |
| 260 | "R_V850_SDA_15_16_OFFSET", /* name */ |
| 261 | false, /* partial_inplace */ |
| 262 | 0xfffe, /* src_mask */ |
| 263 | 0xfffe, /* dst_mask */ |
| 264 | false), /* pcrel_offset */ |
| 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 */ |
| 271 | false, /* pc_relative */ |
| 272 | 0, /* bitpos */ |
| 273 | complain_overflow_dont, /* complain_on_overflow */ |
| 274 | v850_elf_reloc, /* special_function */ |
| 275 | "R_V850_ZDA_16_16_OFFSET", /* name */ |
| 276 | false, /* partial_inplace */ |
| 277 | 0xffff, /* src_mask */ |
| 278 | 0xffff, /* dst_mask */ |
| 279 | false), /* pcrel_offset */ |
| 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 */ |
| 286 | false, /* pc_relative */ |
| 287 | 1, /* bitpos */ |
| 288 | complain_overflow_dont, /* complain_on_overflow */ |
| 289 | v850_elf_reloc, /* special_function */ |
| 290 | "R_V850_ZDA_15_16_OFFSET", /* name */ |
| 291 | false, /* partial_inplace */ |
| 292 | 0xfffe, /* src_mask */ |
| 293 | 0xfffe, /* dst_mask */ |
| 294 | false), /* pcrel_offset */ |
| 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 */ |
| 301 | false, /* pc_relative */ |
| 302 | 1, /* bitpos */ |
| 303 | complain_overflow_dont, /* complain_on_overflow */ |
| 304 | v850_elf_reloc, /* special_function */ |
| 305 | "R_V850_TDA_6_8_OFFSET", /* name */ |
| 306 | false, /* partial_inplace */ |
| 307 | 0x7e, /* src_mask */ |
| 308 | 0x7e, /* dst_mask */ |
| 309 | false), /* pcrel_offset */ |
| 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 */ |
| 316 | false, /* pc_relative */ |
| 317 | 0, /* bitpos */ |
| 318 | complain_overflow_dont, /* complain_on_overflow */ |
| 319 | v850_elf_reloc, /* special_function */ |
| 320 | "R_V850_TDA_7_8_OFFSET", /* name */ |
| 321 | false, /* partial_inplace */ |
| 322 | 0x7f, /* src_mask */ |
| 323 | 0x7f, /* dst_mask */ |
| 324 | false), /* pcrel_offset */ |
| 325 | |
| 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 */ |
| 331 | false, /* pc_relative */ |
| 332 | 0, /* bitpos */ |
| 333 | complain_overflow_dont, /* complain_on_overflow */ |
| 334 | v850_elf_reloc, /* special_function */ |
| 335 | "R_V850_TDA_7_7_OFFSET", /* name */ |
| 336 | false, /* partial_inplace */ |
| 337 | 0x7f, /* src_mask */ |
| 338 | 0x7f, /* dst_mask */ |
| 339 | false), /* pcrel_offset */ |
| 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 */ |
| 346 | false, /* pc_relative */ |
| 347 | 0, /* bitpos */ |
| 348 | complain_overflow_dont, /* complain_on_overflow */ |
| 349 | v850_elf_reloc, /* special_function */ |
| 350 | "R_V850_TDA_16_16_OFFSET", /* name */ |
| 351 | false, /* partial_inplace */ |
| 352 | 0xffff, /* src_mask */ |
| 353 | 0xfff, /* dst_mask */ |
| 354 | false), /* pcrel_offset */ |
| 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 */ |
| 361 | false, /* pc_relative */ |
| 362 | 0, /* bitpos */ |
| 363 | complain_overflow_dont, /* complain_on_overflow */ |
| 364 | v850_elf_reloc, /* special_function */ |
| 365 | "R_V850_TDA_4_5_OFFSET", /* name */ |
| 366 | false, /* partial_inplace */ |
| 367 | 0x0f, /* src_mask */ |
| 368 | 0x0f, /* dst_mask */ |
| 369 | false), /* pcrel_offset */ |
| 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 */ |
| 376 | false, /* pc_relative */ |
| 377 | 0, /* bitpos */ |
| 378 | complain_overflow_dont, /* complain_on_overflow */ |
| 379 | v850_elf_reloc, /* special_function */ |
| 380 | "R_V850_TDA_4_4_OFFSET", /* name */ |
| 381 | false, /* partial_inplace */ |
| 382 | 0x0f, /* src_mask */ |
| 383 | 0x0f, /* dst_mask */ |
| 384 | false), /* pcrel_offset */ |
| 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 */ |
| 391 | false, /* pc_relative */ |
| 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 */ |
| 396 | false, /* partial_inplace */ |
| 397 | 0xfffe0020, /* src_mask */ |
| 398 | 0xfffe0020, /* dst_mask */ |
| 399 | false), /* pcrel_offset */ |
| 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 */ |
| 406 | false, /* pc_relative */ |
| 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 */ |
| 411 | false, /* partial_inplace */ |
| 412 | 0xfffe0020, /* src_mask */ |
| 413 | 0xfffe0020, /* dst_mask */ |
| 414 | false), /* pcrel_offset */ |
| 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 */ |
| 421 | false, /* pc_relative */ |
| 422 | 0, /* bitpos */ |
| 423 | complain_overflow_dont, /* complain_on_overflow */ |
| 424 | v850_elf_reloc, /* special_function */ |
| 425 | "R_V850_CALLT_6_7_OFFSET", /* name */ |
| 426 | false, /* partial_inplace */ |
| 427 | 0x3f, /* src_mask */ |
| 428 | 0x3f, /* dst_mask */ |
| 429 | false), /* pcrel_offset */ |
| 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 */ |
| 436 | false, /* pc_relative */ |
| 437 | 0, /* bitpos */ |
| 438 | complain_overflow_dont, /* complain_on_overflow */ |
| 439 | v850_elf_reloc, /* special_function */ |
| 440 | "R_V850_CALLT_16_16_OFFSET", /* name */ |
| 441 | false, /* partial_inplace */ |
| 442 | 0xffff, /* src_mask */ |
| 443 | 0xffff, /* dst_mask */ |
| 444 | false), /* pcrel_offset */ |
| 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 */ |
| 451 | false, /* pc_relative */ |
| 452 | 0, /* bitpos */ |
| 453 | complain_overflow_dont, /* complain_on_overflow */ |
| 454 | NULL, /* special_function */ |
| 455 | "R_V850_GNU_VTINHERIT", /* name */ |
| 456 | false, /* partial_inplace */ |
| 457 | 0, /* src_mask */ |
| 458 | 0, /* dst_mask */ |
| 459 | false), /* pcrel_offset */ |
| 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 */ |
| 466 | false, /* pc_relative */ |
| 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 */ |
| 471 | false, /* partial_inplace */ |
| 472 | 0, /* src_mask */ |
| 473 | 0, /* dst_mask */ |
| 474 | false), /* pcrel_offset */ |
| 475 | |
| 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 */ |
| 482 | true, /* pc_relative */ |
| 483 | 0, /* bitpos */ |
| 484 | complain_overflow_signed, /* complain_on_overflow */ |
| 485 | v850_elf_ignore_reloc, /* special_function */ |
| 486 | "R_V850_LONGCALL", /* name */ |
| 487 | false, /* partial_inplace */ |
| 488 | 0, /* src_mask */ |
| 489 | 0, /* dst_mask */ |
| 490 | true), /* pcrel_offset */ |
| 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 */ |
| 498 | true, /* pc_relative */ |
| 499 | 0, /* bitpos */ |
| 500 | complain_overflow_signed, /* complain_on_overflow */ |
| 501 | v850_elf_ignore_reloc, /* special_function */ |
| 502 | "R_V850_LONGJUMP", /* name */ |
| 503 | false, /* partial_inplace */ |
| 504 | 0, /* src_mask */ |
| 505 | 0, /* dst_mask */ |
| 506 | true), /* pcrel_offset */ |
| 507 | |
| 508 | HOWTO (R_V850_ALIGN, /* type */ |
| 509 | 0, /* rightshift */ |
| 510 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 511 | 0, /* bitsize */ |
| 512 | false, /* pc_relative */ |
| 513 | 0, /* bitpos */ |
| 514 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 515 | v850_elf_ignore_reloc, /* special_function */ |
| 516 | "R_V850_ALIGN", /* name */ |
| 517 | false, /* partial_inplace */ |
| 518 | 0, /* src_mask */ |
| 519 | 0, /* dst_mask */ |
| 520 | true), /* pcrel_offset */ |
| 521 | }; |
| 522 | |
| 523 | /* Map BFD reloc types to V850 ELF reloc types. */ |
| 524 | |
| 525 | struct v850_elf_reloc_map |
| 526 | { |
| 527 | /* BFD_RELOC_V850_CALLT_16_16_OFFSET is 258, which will not fix in an |
| 528 | unsigned char. */ |
| 529 | bfd_reloc_code_real_type bfd_reloc_val; |
| 530 | unsigned int elf_reloc_val; |
| 531 | }; |
| 532 | |
| 533 | static const struct v850_elf_reloc_map v850_elf_reloc_map[] = |
| 534 | { |
| 535 | { BFD_RELOC_NONE, R_V850_NONE }, |
| 536 | { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL }, |
| 537 | { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL }, |
| 538 | { BFD_RELOC_HI16_S, R_V850_HI16_S }, |
| 539 | { BFD_RELOC_HI16, R_V850_HI16 }, |
| 540 | { BFD_RELOC_LO16, R_V850_LO16 }, |
| 541 | { BFD_RELOC_32, R_V850_32 }, |
| 542 | { BFD_RELOC_16, R_V850_16 }, |
| 543 | { BFD_RELOC_8, R_V850_8 }, |
| 544 | { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET }, |
| 545 | { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET }, |
| 546 | { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET }, |
| 547 | { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET }, |
| 548 | { BFD_RELOC_V850_TDA_6_8_OFFSET, R_V850_TDA_6_8_OFFSET }, |
| 549 | { BFD_RELOC_V850_TDA_7_8_OFFSET, R_V850_TDA_7_8_OFFSET }, |
| 550 | { BFD_RELOC_V850_TDA_7_7_OFFSET, R_V850_TDA_7_7_OFFSET }, |
| 551 | { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET }, |
| 552 | { BFD_RELOC_V850_TDA_4_5_OFFSET, R_V850_TDA_4_5_OFFSET }, |
| 553 | { BFD_RELOC_V850_TDA_4_4_OFFSET, R_V850_TDA_4_4_OFFSET }, |
| 554 | { BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET, R_V850_SDA_16_16_SPLIT_OFFSET }, |
| 555 | { BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET, R_V850_ZDA_16_16_SPLIT_OFFSET }, |
| 556 | { BFD_RELOC_V850_CALLT_6_7_OFFSET, R_V850_CALLT_6_7_OFFSET }, |
| 557 | { BFD_RELOC_V850_CALLT_16_16_OFFSET, R_V850_CALLT_16_16_OFFSET }, |
| 558 | { BFD_RELOC_VTABLE_INHERIT, R_V850_GNU_VTINHERIT }, |
| 559 | { BFD_RELOC_VTABLE_ENTRY, R_V850_GNU_VTENTRY }, |
| 560 | { BFD_RELOC_V850_LONGCALL, R_V850_LONGCALL }, |
| 561 | { BFD_RELOC_V850_LONGJUMP, R_V850_LONGJUMP }, |
| 562 | { BFD_RELOC_V850_ALIGN, R_V850_ALIGN }, |
| 563 | |
| 564 | }; |
| 565 | \f |
| 566 | /* Map a bfd relocation into the appropriate howto structure. */ |
| 567 | |
| 568 | static reloc_howto_type * |
| 569 | v850_elf_reloc_type_lookup (abfd, code) |
| 570 | bfd * abfd ATTRIBUTE_UNUSED; |
| 571 | bfd_reloc_code_real_type code; |
| 572 | { |
| 573 | unsigned int i; |
| 574 | |
| 575 | for (i = ARRAY_SIZE (v850_elf_reloc_map); i --;) |
| 576 | if (v850_elf_reloc_map[i].bfd_reloc_val == code) |
| 577 | { |
| 578 | unsigned int elf_reloc_val = v850_elf_reloc_map[i].elf_reloc_val; |
| 579 | |
| 580 | BFD_ASSERT (v850_elf_howto_table[elf_reloc_val].type == elf_reloc_val); |
| 581 | |
| 582 | return v850_elf_howto_table + elf_reloc_val; |
| 583 | } |
| 584 | |
| 585 | return NULL; |
| 586 | } |
| 587 | \f |
| 588 | /* Set the howto pointer for an V850 ELF reloc. */ |
| 589 | |
| 590 | static void |
| 591 | v850_elf_info_to_howto_rel (abfd, cache_ptr, dst) |
| 592 | bfd * abfd ATTRIBUTE_UNUSED; |
| 593 | arelent * cache_ptr; |
| 594 | Elf32_Internal_Rel * dst; |
| 595 | { |
| 596 | unsigned int r_type; |
| 597 | |
| 598 | r_type = ELF32_R_TYPE (dst->r_info); |
| 599 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); |
| 600 | cache_ptr->howto = &v850_elf_howto_table[r_type]; |
| 601 | } |
| 602 | |
| 603 | /* Set the howto pointer for a V850 ELF reloc (type RELA). */ |
| 604 | static void |
| 605 | v850_elf_info_to_howto_rela (abfd, cache_ptr, dst) |
| 606 | bfd * abfd ATTRIBUTE_UNUSED; |
| 607 | arelent * cache_ptr; |
| 608 | Elf32_Internal_Rela *dst; |
| 609 | { |
| 610 | unsigned int r_type; |
| 611 | |
| 612 | r_type = ELF32_R_TYPE (dst->r_info); |
| 613 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); |
| 614 | cache_ptr->howto = &v850_elf_howto_table[r_type]; |
| 615 | } |
| 616 | \f |
| 617 | /* Look through the relocs for a section during the first phase, and |
| 618 | allocate space in the global offset table or procedure linkage |
| 619 | table. */ |
| 620 | |
| 621 | static boolean |
| 622 | v850_elf_check_relocs (abfd, info, sec, relocs) |
| 623 | bfd * abfd; |
| 624 | struct bfd_link_info * info; |
| 625 | asection * sec; |
| 626 | const Elf_Internal_Rela * relocs; |
| 627 | { |
| 628 | boolean ret = true; |
| 629 | bfd *dynobj; |
| 630 | Elf_Internal_Shdr *symtab_hdr; |
| 631 | struct elf_link_hash_entry **sym_hashes; |
| 632 | const Elf_Internal_Rela *rel; |
| 633 | const Elf_Internal_Rela *rel_end; |
| 634 | asection *sreloc; |
| 635 | enum v850_reloc_type r_type; |
| 636 | int other = 0; |
| 637 | const char *common = (const char *)0; |
| 638 | |
| 639 | if (info->relocateable) |
| 640 | return true; |
| 641 | |
| 642 | #ifdef DEBUG |
| 643 | fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n", |
| 644 | bfd_get_section_name (abfd, sec), |
| 645 | bfd_archive_filename (abfd)); |
| 646 | #endif |
| 647 | |
| 648 | dynobj = elf_hash_table (info)->dynobj; |
| 649 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 650 | sym_hashes = elf_sym_hashes (abfd); |
| 651 | sreloc = NULL; |
| 652 | |
| 653 | rel_end = relocs + sec->reloc_count; |
| 654 | for (rel = relocs; rel < rel_end; rel++) |
| 655 | { |
| 656 | unsigned long r_symndx; |
| 657 | struct elf_link_hash_entry *h; |
| 658 | |
| 659 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 660 | if (r_symndx < symtab_hdr->sh_info) |
| 661 | h = NULL; |
| 662 | else |
| 663 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 664 | |
| 665 | r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info); |
| 666 | switch (r_type) |
| 667 | { |
| 668 | default: |
| 669 | case R_V850_NONE: |
| 670 | case R_V850_9_PCREL: |
| 671 | case R_V850_22_PCREL: |
| 672 | case R_V850_HI16_S: |
| 673 | case R_V850_HI16: |
| 674 | case R_V850_LO16: |
| 675 | case R_V850_32: |
| 676 | case R_V850_16: |
| 677 | case R_V850_8: |
| 678 | case R_V850_CALLT_6_7_OFFSET: |
| 679 | case R_V850_CALLT_16_16_OFFSET: |
| 680 | break; |
| 681 | |
| 682 | /* This relocation describes the C++ object vtable hierarchy. |
| 683 | Reconstruct it for later use during GC. */ |
| 684 | case R_V850_GNU_VTINHERIT: |
| 685 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 686 | return false; |
| 687 | break; |
| 688 | |
| 689 | /* This relocation describes which C++ vtable entries |
| 690 | are actually used. Record for later use during GC. */ |
| 691 | case R_V850_GNU_VTENTRY: |
| 692 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 693 | return false; |
| 694 | break; |
| 695 | |
| 696 | case R_V850_SDA_16_16_SPLIT_OFFSET: |
| 697 | case R_V850_SDA_16_16_OFFSET: |
| 698 | case R_V850_SDA_15_16_OFFSET: |
| 699 | other = V850_OTHER_SDA; |
| 700 | common = ".scommon"; |
| 701 | goto small_data_common; |
| 702 | |
| 703 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
| 704 | case R_V850_ZDA_16_16_OFFSET: |
| 705 | case R_V850_ZDA_15_16_OFFSET: |
| 706 | other = V850_OTHER_ZDA; |
| 707 | common = ".zcommon"; |
| 708 | goto small_data_common; |
| 709 | |
| 710 | case R_V850_TDA_4_5_OFFSET: |
| 711 | case R_V850_TDA_4_4_OFFSET: |
| 712 | case R_V850_TDA_6_8_OFFSET: |
| 713 | case R_V850_TDA_7_8_OFFSET: |
| 714 | case R_V850_TDA_7_7_OFFSET: |
| 715 | case R_V850_TDA_16_16_OFFSET: |
| 716 | other = V850_OTHER_TDA; |
| 717 | common = ".tcommon"; |
| 718 | /* fall through */ |
| 719 | |
| 720 | #define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA) |
| 721 | |
| 722 | small_data_common: |
| 723 | if (h) |
| 724 | { |
| 725 | /* Flag which type of relocation was used. */ |
| 726 | h->other |= other; |
| 727 | if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK) |
| 728 | && (h->other & V850_OTHER_ERROR) == 0) |
| 729 | { |
| 730 | const char * msg; |
| 731 | static char buff[200]; /* XXX */ |
| 732 | |
| 733 | switch (h->other & V850_OTHER_MASK) |
| 734 | { |
| 735 | default: |
| 736 | msg = _("Variable `%s' cannot occupy in multiple small data regions"); |
| 737 | break; |
| 738 | case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA: |
| 739 | msg = _("Variable `%s' can only be in one of the small, zero, and tiny data regions"); |
| 740 | break; |
| 741 | case V850_OTHER_SDA | V850_OTHER_ZDA: |
| 742 | msg = _("Variable `%s' cannot be in both small and zero data regions simultaneously"); |
| 743 | break; |
| 744 | case V850_OTHER_SDA | V850_OTHER_TDA: |
| 745 | msg = _("Variable `%s' cannot be in both small and tiny data regions simultaneously"); |
| 746 | break; |
| 747 | case V850_OTHER_ZDA | V850_OTHER_TDA: |
| 748 | msg = _("Variable `%s' cannot be in both zero and tiny data regions simultaneously"); |
| 749 | break; |
| 750 | } |
| 751 | |
| 752 | sprintf (buff, msg, h->root.root.string); |
| 753 | info->callbacks->warning (info, buff, h->root.root.string, |
| 754 | abfd, h->root.u.def.section, |
| 755 | (bfd_vma) 0); |
| 756 | |
| 757 | bfd_set_error (bfd_error_bad_value); |
| 758 | h->other |= V850_OTHER_ERROR; |
| 759 | ret = false; |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | if (h && h->root.type == bfd_link_hash_common |
| 764 | && h->root.u.c.p |
| 765 | && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON")) |
| 766 | { |
| 767 | asection * section; |
| 768 | |
| 769 | section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common); |
| 770 | section->flags |= SEC_IS_COMMON; |
| 771 | } |
| 772 | |
| 773 | #ifdef DEBUG |
| 774 | fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n", |
| 775 | v850_elf_howto_table[ (int)r_type ].name, |
| 776 | (h && h->root.root.string) ? h->root.root.string : "<unknown>", |
| 777 | (h->root.type == bfd_link_hash_common) ? ", symbol is common" : ""); |
| 778 | #endif |
| 779 | break; |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | return ret; |
| 784 | } |
| 785 | |
| 786 | /* In the old version, when an entry was checked out from the table, |
| 787 | it was deleted. This produced an error if the entry was needed |
| 788 | more than once, as the second attempted retry failed. |
| 789 | |
| 790 | In the current version, the entry is not deleted, instead we set |
| 791 | the field 'found' to true. If a second lookup matches the same |
| 792 | entry, then we know that the hi16s reloc has already been updated |
| 793 | and does not need to be updated a second time. |
| 794 | |
| 795 | TODO - TOFIX: If it is possible that we need to restore 2 different |
| 796 | addresses from the same table entry, where the first generates an |
| 797 | overflow, whilst the second do not, then this code will fail. */ |
| 798 | |
| 799 | typedef struct hi16s_location |
| 800 | { |
| 801 | bfd_vma addend; |
| 802 | bfd_byte * address; |
| 803 | unsigned long counter; |
| 804 | boolean found; |
| 805 | struct hi16s_location * next; |
| 806 | } |
| 807 | hi16s_location; |
| 808 | |
| 809 | static hi16s_location * previous_hi16s; |
| 810 | static hi16s_location * free_hi16s; |
| 811 | static unsigned long hi16s_counter; |
| 812 | |
| 813 | static void |
| 814 | remember_hi16s_reloc (abfd, addend, address) |
| 815 | bfd * abfd; |
| 816 | bfd_vma addend; |
| 817 | bfd_byte * address; |
| 818 | { |
| 819 | hi16s_location * entry = NULL; |
| 820 | bfd_size_type amt = sizeof (* free_hi16s); |
| 821 | |
| 822 | /* Find a free structure. */ |
| 823 | if (free_hi16s == NULL) |
| 824 | free_hi16s = (hi16s_location *) bfd_zalloc (abfd, amt); |
| 825 | |
| 826 | entry = free_hi16s; |
| 827 | free_hi16s = free_hi16s->next; |
| 828 | |
| 829 | entry->addend = addend; |
| 830 | entry->address = address; |
| 831 | entry->counter = hi16s_counter ++; |
| 832 | entry->found = false; |
| 833 | entry->next = previous_hi16s; |
| 834 | previous_hi16s = entry; |
| 835 | |
| 836 | /* Cope with wrap around of our counter. */ |
| 837 | if (hi16s_counter == 0) |
| 838 | { |
| 839 | /* XXX - Assume that all counter entries differ only in their low 16 bits. */ |
| 840 | for (entry = previous_hi16s; entry != NULL; entry = entry->next) |
| 841 | entry->counter &= 0xffff; |
| 842 | |
| 843 | hi16s_counter = 0x10000; |
| 844 | } |
| 845 | |
| 846 | return; |
| 847 | } |
| 848 | |
| 849 | static bfd_byte * |
| 850 | find_remembered_hi16s_reloc (addend, already_found) |
| 851 | bfd_vma addend; |
| 852 | boolean * already_found; |
| 853 | { |
| 854 | hi16s_location * match = NULL; |
| 855 | hi16s_location * entry; |
| 856 | hi16s_location * previous = NULL; |
| 857 | hi16s_location * prev; |
| 858 | bfd_byte * addr; |
| 859 | |
| 860 | /* Search the table. Record the most recent entry that matches. */ |
| 861 | for (entry = previous_hi16s; entry; entry = entry->next) |
| 862 | { |
| 863 | if (entry->addend == addend |
| 864 | && (match == NULL || match->counter < entry->counter)) |
| 865 | { |
| 866 | previous = prev; |
| 867 | match = entry; |
| 868 | } |
| 869 | |
| 870 | prev = entry; |
| 871 | } |
| 872 | |
| 873 | if (match == NULL) |
| 874 | return NULL; |
| 875 | |
| 876 | /* Extract the address. */ |
| 877 | addr = match->address; |
| 878 | |
| 879 | /* Remeber if this entry has already been used before. */ |
| 880 | if (already_found) |
| 881 | * already_found = match->found; |
| 882 | |
| 883 | /* Note that this entry has now been used. */ |
| 884 | match->found = true; |
| 885 | |
| 886 | return addr; |
| 887 | } |
| 888 | |
| 889 | /* FIXME: The code here probably ought to be removed and the code in reloc.c |
| 890 | allowed to do its stuff instead. At least for most of the relocs, anwyay. */ |
| 891 | |
| 892 | static bfd_reloc_status_type |
| 893 | v850_elf_perform_relocation (abfd, r_type, addend, address) |
| 894 | bfd *abfd; |
| 895 | unsigned int r_type; |
| 896 | bfd_vma addend; |
| 897 | bfd_byte *address; |
| 898 | { |
| 899 | unsigned long insn; |
| 900 | bfd_signed_vma saddend = (bfd_signed_vma) addend; |
| 901 | |
| 902 | switch (r_type) |
| 903 | { |
| 904 | default: |
| 905 | /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */ |
| 906 | return bfd_reloc_notsupported; |
| 907 | |
| 908 | case R_V850_32: |
| 909 | bfd_put_32 (abfd, addend, address); |
| 910 | return bfd_reloc_ok; |
| 911 | |
| 912 | case R_V850_22_PCREL: |
| 913 | if (saddend > 0x1fffff || saddend < -0x200000) |
| 914 | return bfd_reloc_overflow; |
| 915 | |
| 916 | if ((addend % 2) != 0) |
| 917 | return bfd_reloc_dangerous; |
| 918 | |
| 919 | insn = bfd_get_32 (abfd, address); |
| 920 | insn &= ~0xfffe003f; |
| 921 | insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16)); |
| 922 | bfd_put_32 (abfd, (bfd_vma) insn, address); |
| 923 | return bfd_reloc_ok; |
| 924 | |
| 925 | case R_V850_9_PCREL: |
| 926 | if (saddend > 0xff || saddend < -0x100) |
| 927 | return bfd_reloc_overflow; |
| 928 | |
| 929 | if ((addend % 2) != 0) |
| 930 | return bfd_reloc_dangerous; |
| 931 | |
| 932 | insn = bfd_get_16 (abfd, address); |
| 933 | insn &= ~ 0xf870; |
| 934 | insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3); |
| 935 | break; |
| 936 | |
| 937 | case R_V850_HI16: |
| 938 | addend += (bfd_get_16 (abfd, address) << 16); |
| 939 | addend = (addend >> 16); |
| 940 | insn = addend; |
| 941 | break; |
| 942 | |
| 943 | case R_V850_HI16_S: |
| 944 | /* Remember where this relocation took place. */ |
| 945 | remember_hi16s_reloc (abfd, addend, address); |
| 946 | |
| 947 | addend += (bfd_get_16 (abfd, address) << 16); |
| 948 | addend = (addend >> 16) + ((addend & 0x8000) != 0); |
| 949 | |
| 950 | /* This relocation cannot overflow. */ |
| 951 | if (addend > 0x7fff) |
| 952 | addend = 0; |
| 953 | |
| 954 | insn = addend; |
| 955 | break; |
| 956 | |
| 957 | case R_V850_LO16: |
| 958 | /* Calculate the sum of the value stored in the instruction and the |
| 959 | addend and check for overflow from the low 16 bits into the high |
| 960 | 16 bits. The assembler has already done some of this: If the |
| 961 | value stored in the instruction has its 15th bit set, (counting |
| 962 | from zero) then the assembler will have added 1 to the value |
| 963 | stored in the associated HI16S reloc. So for example, these |
| 964 | relocations: |
| 965 | |
| 966 | movhi hi( fred ), r0, r1 |
| 967 | movea lo( fred ), r1, r1 |
| 968 | |
| 969 | will store 0 in the value fields for the MOVHI and MOVEA instructions |
| 970 | and addend will be the address of fred, but for these instructions: |
| 971 | |
| 972 | movhi hi( fred + 0x123456), r0, r1 |
| 973 | movea lo( fred + 0x123456), r1, r1 |
| 974 | |
| 975 | the value stored in the MOVHI instruction will be 0x12 and the value |
| 976 | stored in the MOVEA instruction will be 0x3456. If however the |
| 977 | instructions were: |
| 978 | |
| 979 | movhi hi( fred + 0x10ffff), r0, r1 |
| 980 | movea lo( fred + 0x10ffff), r1, r1 |
| 981 | |
| 982 | then the value stored in the MOVHI instruction would be 0x11 (not |
| 983 | 0x10) and the value stored in the MOVEA instruction would be 0xffff. |
| 984 | Thus (assuming for the moment that the addend is 0), at run time the |
| 985 | MOVHI instruction loads 0x110000 into r1, then the MOVEA instruction |
| 986 | adds 0xffffffff (sign extension!) producing 0x10ffff. Similarly if |
| 987 | the instructions were: |
| 988 | |
| 989 | movhi hi( fred - 1), r0, r1 |
| 990 | movea lo( fred - 1), r1, r1 |
| 991 | |
| 992 | then 0 is stored in the MOVHI instruction and -1 is stored in the |
| 993 | MOVEA instruction. |
| 994 | |
| 995 | Overflow can occur if the addition of the value stored in the |
| 996 | instruction plus the addend sets the 15th bit when before it was clear. |
| 997 | This is because the 15th bit will be sign extended into the high part, |
| 998 | thus reducing its value by one, but since the 15th bit was originally |
| 999 | clear, the assembler will not have added 1 to the previous HI16S reloc |
| 1000 | to compensate for this effect. For example: |
| 1001 | |
| 1002 | movhi hi( fred + 0x123456), r0, r1 |
| 1003 | movea lo( fred + 0x123456), r1, r1 |
| 1004 | |
| 1005 | The value stored in HI16S reloc is 0x12, the value stored in the LO16 |
| 1006 | reloc is 0x3456. If we assume that the address of fred is 0x00007000 |
| 1007 | then the relocations become: |
| 1008 | |
| 1009 | HI16S: 0x0012 + (0x00007000 >> 16) = 0x12 |
| 1010 | LO16: 0x3456 + (0x00007000 & 0xffff) = 0xa456 |
| 1011 | |
| 1012 | but when the instructions are executed, the MOVEA instruction's value |
| 1013 | is signed extended, so the sum becomes: |
| 1014 | |
| 1015 | 0x00120000 |
| 1016 | + 0xffffa456 |
| 1017 | ------------ |
| 1018 | 0x0011a456 but 'fred + 0x123456' = 0x0012a456 |
| 1019 | |
| 1020 | Note that if the 15th bit was set in the value stored in the LO16 |
| 1021 | reloc, then we do not have to do anything: |
| 1022 | |
| 1023 | movhi hi( fred + 0x10ffff), r0, r1 |
| 1024 | movea lo( fred + 0x10ffff), r1, r1 |
| 1025 | |
| 1026 | HI16S: 0x0011 + (0x00007000 >> 16) = 0x11 |
| 1027 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff |
| 1028 | |
| 1029 | 0x00110000 |
| 1030 | + 0x00006fff |
| 1031 | ------------ |
| 1032 | 0x00116fff = fred + 0x10ffff = 0x7000 + 0x10ffff |
| 1033 | |
| 1034 | Overflow can also occur if the computation carries into the 16th bit |
| 1035 | and it also results in the 15th bit having the same value as the 15th |
| 1036 | bit of the original value. What happens is that the HI16S reloc |
| 1037 | will have already examined the 15th bit of the original value and |
| 1038 | added 1 to the high part if the bit is set. This compensates for the |
| 1039 | sign extension of 15th bit of the result of the computation. But now |
| 1040 | there is a carry into the 16th bit, and this has not been allowed for. |
| 1041 | |
| 1042 | So, for example if fred is at address 0xf000: |
| 1043 | |
| 1044 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] |
| 1045 | movea lo( fred + 0xffff), r1, r1 |
| 1046 | |
| 1047 | HI16S: 0x0001 + (0x0000f000 >> 16) = 0x0001 |
| 1048 | LO16: 0xffff + (0x0000f000 & 0xffff) = 0xefff (carry into bit 16 is lost) |
| 1049 | |
| 1050 | 0x00010000 |
| 1051 | + 0xffffefff |
| 1052 | ------------ |
| 1053 | 0x0000efff but 'fred + 0xffff' = 0x0001efff |
| 1054 | |
| 1055 | Similarly, if the 15th bit remains clear, but overflow occurs into |
| 1056 | the 16th bit then (assuming the address of fred is 0xf000): |
| 1057 | |
| 1058 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] |
| 1059 | movea lo( fred + 0x7000), r1, r1 |
| 1060 | |
| 1061 | HI16S: 0x0000 + (0x0000f000 >> 16) = 0x0000 |
| 1062 | LO16: 0x7000 + (0x0000f000 & 0xffff) = 0x6fff (carry into bit 16 is lost) |
| 1063 | |
| 1064 | 0x00000000 |
| 1065 | + 0x00006fff |
| 1066 | ------------ |
| 1067 | 0x00006fff but 'fred + 0x7000' = 0x00016fff |
| 1068 | |
| 1069 | Note - there is no need to change anything if a carry occurs, and the |
| 1070 | 15th bit changes its value from being set to being clear, as the HI16S |
| 1071 | reloc will have already added in 1 to the high part for us: |
| 1072 | |
| 1073 | movhi hi( fred + 0xffff), r0, r1 [bit 15 of the offset is set] |
| 1074 | movea lo( fred + 0xffff), r1, r1 |
| 1075 | |
| 1076 | HI16S: 0x0001 + (0x00007000 >> 16) |
| 1077 | LO16: 0xffff + (0x00007000 & 0xffff) = 0x6fff (carry into bit 16 is lost) |
| 1078 | |
| 1079 | 0x00010000 |
| 1080 | + 0x00006fff (bit 15 not set, so the top half is zero) |
| 1081 | ------------ |
| 1082 | 0x00016fff which is right (assuming that fred is at 0x7000) |
| 1083 | |
| 1084 | but if the 15th bit goes from being clear to being set, then we must |
| 1085 | once again handle overflow: |
| 1086 | |
| 1087 | movhi hi( fred + 0x7000), r0, r1 [bit 15 of the offset is clear] |
| 1088 | movea lo( fred + 0x7000), r1, r1 |
| 1089 | |
| 1090 | HI16S: 0x0000 + (0x0000ffff >> 16) |
| 1091 | LO16: 0x7000 + (0x0000ffff & 0xffff) = 0x6fff (carry into bit 16) |
| 1092 | |
| 1093 | 0x00000000 |
| 1094 | + 0x00006fff (bit 15 not set, so the top half is zero) |
| 1095 | ------------ |
| 1096 | 0x00006fff which is wrong (assuming that fred is at 0xffff). */ |
| 1097 | { |
| 1098 | long result; |
| 1099 | |
| 1100 | insn = bfd_get_16 (abfd, address); |
| 1101 | result = insn + addend; |
| 1102 | |
| 1103 | #define BIT15_SET(x) ((x) & 0x8000) |
| 1104 | #define OVERFLOWS(a,i) ((((a) & 0xffff) + (i)) > 0xffff) |
| 1105 | |
| 1106 | if ((BIT15_SET (result) && ! BIT15_SET (addend)) |
| 1107 | || (OVERFLOWS (addend, insn) |
| 1108 | && ((! BIT15_SET (insn)) || (BIT15_SET (addend))))) |
| 1109 | { |
| 1110 | boolean already_updated; |
| 1111 | bfd_byte * hi16s_address = find_remembered_hi16s_reloc |
| 1112 | (addend, & already_updated); |
| 1113 | |
| 1114 | /* Amend the matching HI16_S relocation. */ |
| 1115 | if (hi16s_address != NULL) |
| 1116 | { |
| 1117 | if (! already_updated) |
| 1118 | { |
| 1119 | insn = bfd_get_16 (abfd, hi16s_address); |
| 1120 | insn += 1; |
| 1121 | bfd_put_16 (abfd, (bfd_vma) insn, hi16s_address); |
| 1122 | } |
| 1123 | } |
| 1124 | else |
| 1125 | { |
| 1126 | fprintf (stderr, _("FAILED to find previous HI16 reloc\n")); |
| 1127 | return bfd_reloc_overflow; |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | /* Do not complain if value has top bit set, as this has been anticipated. */ |
| 1132 | insn = result & 0xffff; |
| 1133 | break; |
| 1134 | } |
| 1135 | |
| 1136 | case R_V850_8: |
| 1137 | addend += (char) bfd_get_8 (abfd, address); |
| 1138 | |
| 1139 | saddend = (bfd_signed_vma) addend; |
| 1140 | |
| 1141 | if (saddend > 0x7f || saddend < -0x80) |
| 1142 | return bfd_reloc_overflow; |
| 1143 | |
| 1144 | bfd_put_8 (abfd, addend, address); |
| 1145 | return bfd_reloc_ok; |
| 1146 | |
| 1147 | case R_V850_CALLT_16_16_OFFSET: |
| 1148 | addend += bfd_get_16 (abfd, address); |
| 1149 | |
| 1150 | saddend = (bfd_signed_vma) addend; |
| 1151 | |
| 1152 | if (saddend > 0xffff || saddend < 0) |
| 1153 | return bfd_reloc_overflow; |
| 1154 | |
| 1155 | insn = addend; |
| 1156 | break; |
| 1157 | |
| 1158 | case R_V850_16: |
| 1159 | |
| 1160 | /* drop through */ |
| 1161 | case R_V850_SDA_16_16_OFFSET: |
| 1162 | case R_V850_ZDA_16_16_OFFSET: |
| 1163 | case R_V850_TDA_16_16_OFFSET: |
| 1164 | addend += bfd_get_16 (abfd, address); |
| 1165 | |
| 1166 | saddend = (bfd_signed_vma) addend; |
| 1167 | |
| 1168 | if (saddend > 0x7fff || saddend < -0x8000) |
| 1169 | return bfd_reloc_overflow; |
| 1170 | |
| 1171 | insn = addend; |
| 1172 | break; |
| 1173 | |
| 1174 | case R_V850_SDA_15_16_OFFSET: |
| 1175 | case R_V850_ZDA_15_16_OFFSET: |
| 1176 | insn = bfd_get_16 (abfd, address); |
| 1177 | addend += (insn & 0xfffe); |
| 1178 | |
| 1179 | saddend = (bfd_signed_vma) addend; |
| 1180 | |
| 1181 | if (saddend > 0x7ffe || saddend < -0x8000) |
| 1182 | return bfd_reloc_overflow; |
| 1183 | |
| 1184 | if (addend & 1) |
| 1185 | return bfd_reloc_dangerous; |
| 1186 | |
| 1187 | insn = (addend &~ (bfd_vma) 1) | (insn & 1); |
| 1188 | break; |
| 1189 | |
| 1190 | case R_V850_TDA_6_8_OFFSET: |
| 1191 | insn = bfd_get_16 (abfd, address); |
| 1192 | addend += ((insn & 0x7e) << 1); |
| 1193 | |
| 1194 | saddend = (bfd_signed_vma) addend; |
| 1195 | |
| 1196 | if (saddend > 0xfc || saddend < 0) |
| 1197 | return bfd_reloc_overflow; |
| 1198 | |
| 1199 | if (addend & 3) |
| 1200 | return bfd_reloc_dangerous; |
| 1201 | |
| 1202 | insn &= 0xff81; |
| 1203 | insn |= (addend >> 1); |
| 1204 | break; |
| 1205 | |
| 1206 | case R_V850_TDA_7_8_OFFSET: |
| 1207 | insn = bfd_get_16 (abfd, address); |
| 1208 | addend += ((insn & 0x7f) << 1); |
| 1209 | |
| 1210 | saddend = (bfd_signed_vma) addend; |
| 1211 | |
| 1212 | if (saddend > 0xfe || saddend < 0) |
| 1213 | return bfd_reloc_overflow; |
| 1214 | |
| 1215 | if (addend & 1) |
| 1216 | return bfd_reloc_dangerous; |
| 1217 | |
| 1218 | insn &= 0xff80; |
| 1219 | insn |= (addend >> 1); |
| 1220 | break; |
| 1221 | |
| 1222 | case R_V850_TDA_7_7_OFFSET: |
| 1223 | insn = bfd_get_16 (abfd, address); |
| 1224 | addend += insn & 0x7f; |
| 1225 | |
| 1226 | saddend = (bfd_signed_vma) addend; |
| 1227 | |
| 1228 | if (saddend > 0x7f || saddend < 0) |
| 1229 | return bfd_reloc_overflow; |
| 1230 | |
| 1231 | insn &= 0xff80; |
| 1232 | insn |= addend; |
| 1233 | break; |
| 1234 | |
| 1235 | case R_V850_TDA_4_5_OFFSET: |
| 1236 | insn = bfd_get_16 (abfd, address); |
| 1237 | addend += ((insn & 0xf) << 1); |
| 1238 | |
| 1239 | saddend = (bfd_signed_vma) addend; |
| 1240 | |
| 1241 | if (saddend > 0x1e || saddend < 0) |
| 1242 | return bfd_reloc_overflow; |
| 1243 | |
| 1244 | if (addend & 1) |
| 1245 | return bfd_reloc_dangerous; |
| 1246 | |
| 1247 | insn &= 0xfff0; |
| 1248 | insn |= (addend >> 1); |
| 1249 | break; |
| 1250 | |
| 1251 | case R_V850_TDA_4_4_OFFSET: |
| 1252 | insn = bfd_get_16 (abfd, address); |
| 1253 | addend += insn & 0xf; |
| 1254 | |
| 1255 | saddend = (bfd_signed_vma) addend; |
| 1256 | |
| 1257 | if (saddend > 0xf || saddend < 0) |
| 1258 | return bfd_reloc_overflow; |
| 1259 | |
| 1260 | insn &= 0xfff0; |
| 1261 | insn |= addend; |
| 1262 | break; |
| 1263 | |
| 1264 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
| 1265 | case R_V850_SDA_16_16_SPLIT_OFFSET: |
| 1266 | insn = bfd_get_32 (abfd, address); |
| 1267 | addend += ((insn & 0xfffe0000) >> 16) + ((insn & 0x20) >> 5); |
| 1268 | |
| 1269 | saddend = (bfd_signed_vma) addend; |
| 1270 | |
| 1271 | if (saddend > 0x7fff || saddend < -0x8000) |
| 1272 | return bfd_reloc_overflow; |
| 1273 | |
| 1274 | insn &= 0x0001ffdf; |
| 1275 | insn |= (addend & 1) << 5; |
| 1276 | insn |= (addend &~ (bfd_vma) 1) << 16; |
| 1277 | |
| 1278 | bfd_put_32 (abfd, (bfd_vma) insn, address); |
| 1279 | return bfd_reloc_ok; |
| 1280 | |
| 1281 | case R_V850_CALLT_6_7_OFFSET: |
| 1282 | insn = bfd_get_16 (abfd, address); |
| 1283 | addend += ((insn & 0x3f) << 1); |
| 1284 | |
| 1285 | saddend = (bfd_signed_vma) addend; |
| 1286 | |
| 1287 | if (saddend > 0x7e || saddend < 0) |
| 1288 | return bfd_reloc_overflow; |
| 1289 | |
| 1290 | if (addend & 1) |
| 1291 | return bfd_reloc_dangerous; |
| 1292 | |
| 1293 | insn &= 0xff80; |
| 1294 | insn |= (addend >> 1); |
| 1295 | break; |
| 1296 | |
| 1297 | case R_V850_GNU_VTINHERIT: |
| 1298 | case R_V850_GNU_VTENTRY: |
| 1299 | return bfd_reloc_ok; |
| 1300 | |
| 1301 | } |
| 1302 | |
| 1303 | bfd_put_16 (abfd, (bfd_vma) insn, address); |
| 1304 | return bfd_reloc_ok; |
| 1305 | } |
| 1306 | \f |
| 1307 | /* Insert the addend into the instruction. */ |
| 1308 | |
| 1309 | static bfd_reloc_status_type |
| 1310 | v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err) |
| 1311 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1312 | arelent * reloc; |
| 1313 | asymbol * symbol; |
| 1314 | PTR data ATTRIBUTE_UNUSED; |
| 1315 | asection * isection; |
| 1316 | bfd * obfd; |
| 1317 | char ** err ATTRIBUTE_UNUSED; |
| 1318 | { |
| 1319 | long relocation; |
| 1320 | |
| 1321 | /* If there is an output BFD, |
| 1322 | and the symbol is not a section name (which is only defined at final link time), |
| 1323 | and either we are not putting the addend into the instruction |
| 1324 | or the addend is zero, so there is nothing to add into the instruction |
| 1325 | then just fixup the address and return. */ |
| 1326 | if (obfd != (bfd *) NULL |
| 1327 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1328 | && (! reloc->howto->partial_inplace |
| 1329 | || reloc->addend == 0)) |
| 1330 | { |
| 1331 | reloc->address += isection->output_offset; |
| 1332 | return bfd_reloc_ok; |
| 1333 | } |
| 1334 | |
| 1335 | /* Catch relocs involving undefined symbols. */ |
| 1336 | if (bfd_is_und_section (symbol->section) |
| 1337 | && (symbol->flags & BSF_WEAK) == 0 |
| 1338 | && obfd == NULL) |
| 1339 | return bfd_reloc_undefined; |
| 1340 | |
| 1341 | /* We handle final linking of some relocs ourselves. */ |
| 1342 | |
| 1343 | /* Is the address of the relocation really within the section? */ |
| 1344 | if (reloc->address > isection->_cooked_size) |
| 1345 | return bfd_reloc_outofrange; |
| 1346 | |
| 1347 | /* Work out which section the relocation is targetted at and the |
| 1348 | initial relocation command value. */ |
| 1349 | |
| 1350 | if (reloc->howto->pc_relative == true) |
| 1351 | return bfd_reloc_ok; |
| 1352 | |
| 1353 | /* Get symbol value. (Common symbols are special.) */ |
| 1354 | if (bfd_is_com_section (symbol->section)) |
| 1355 | relocation = 0; |
| 1356 | else |
| 1357 | relocation = symbol->value; |
| 1358 | |
| 1359 | /* Convert input-section-relative symbol value to absolute + addend. */ |
| 1360 | relocation += symbol->section->output_section->vma; |
| 1361 | relocation += symbol->section->output_offset; |
| 1362 | relocation += reloc->addend; |
| 1363 | |
| 1364 | #if 0 /* Since this reloc is going to be processed later on, we should |
| 1365 | not make it pc-relative here. To test this, try assembling and |
| 1366 | linking this program: |
| 1367 | |
| 1368 | .text |
| 1369 | .globl _start |
| 1370 | nop |
| 1371 | _start: |
| 1372 | jr foo |
| 1373 | |
| 1374 | .section ".foo","ax" |
| 1375 | nop |
| 1376 | foo: |
| 1377 | nop */ |
| 1378 | if (reloc->howto->pc_relative) |
| 1379 | { |
| 1380 | /* Here the variable relocation holds the final address of the |
| 1381 | symbol we are relocating against, plus any addend. */ |
| 1382 | relocation -= isection->output_section->vma + isection->output_offset; |
| 1383 | |
| 1384 | /* Deal with pcrel_offset. */ |
| 1385 | relocation -= reloc->address; |
| 1386 | } |
| 1387 | #endif |
| 1388 | reloc->addend = relocation; |
| 1389 | return bfd_reloc_ok; |
| 1390 | } |
| 1391 | |
| 1392 | /* This function is used for relocs which are only used |
| 1393 | for relaxing, which the linker should otherwise ignore. */ |
| 1394 | |
| 1395 | static bfd_reloc_status_type |
| 1396 | v850_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1397 | output_bfd, error_message) |
| 1398 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1399 | arelent * reloc_entry; |
| 1400 | asymbol * symbol ATTRIBUTE_UNUSED; |
| 1401 | PTR data ATTRIBUTE_UNUSED; |
| 1402 | asection * input_section; |
| 1403 | bfd * output_bfd; |
| 1404 | char ** error_message ATTRIBUTE_UNUSED; |
| 1405 | { |
| 1406 | if (output_bfd != NULL) |
| 1407 | reloc_entry->address += input_section->output_offset; |
| 1408 | |
| 1409 | return bfd_reloc_ok; |
| 1410 | } |
| 1411 | \f |
| 1412 | static boolean |
| 1413 | v850_elf_is_local_label_name (abfd, name) |
| 1414 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1415 | const char * name; |
| 1416 | { |
| 1417 | return ( (name[0] == '.' && (name[1] == 'L' || name[1] == '.')) |
| 1418 | || (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')); |
| 1419 | } |
| 1420 | \f |
| 1421 | /* We overload some of the bfd_reloc error codes for own purposes. */ |
| 1422 | #define bfd_reloc_gp_not_found bfd_reloc_other |
| 1423 | #define bfd_reloc_ep_not_found bfd_reloc_continue |
| 1424 | #define bfd_reloc_ctbp_not_found (bfd_reloc_dangerous + 1) |
| 1425 | |
| 1426 | /* Perform a relocation as part of a final link. */ |
| 1427 | |
| 1428 | static bfd_reloc_status_type |
| 1429 | v850_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1430 | input_section, contents, offset, value, |
| 1431 | addend, info, sym_sec, is_local) |
| 1432 | reloc_howto_type * howto; |
| 1433 | bfd * input_bfd; |
| 1434 | bfd * output_bfd ATTRIBUTE_UNUSED; |
| 1435 | asection * input_section; |
| 1436 | bfd_byte * contents; |
| 1437 | bfd_vma offset; |
| 1438 | bfd_vma value; |
| 1439 | bfd_vma addend; |
| 1440 | struct bfd_link_info * info; |
| 1441 | asection * sym_sec; |
| 1442 | int is_local ATTRIBUTE_UNUSED; |
| 1443 | { |
| 1444 | unsigned int r_type = howto->type; |
| 1445 | bfd_byte * hit_data = contents + offset; |
| 1446 | |
| 1447 | /* Adjust the value according to the relocation. */ |
| 1448 | switch (r_type) |
| 1449 | { |
| 1450 | case R_V850_9_PCREL: |
| 1451 | value -= (input_section->output_section->vma |
| 1452 | + input_section->output_offset); |
| 1453 | value -= offset; |
| 1454 | break; |
| 1455 | |
| 1456 | case R_V850_22_PCREL: |
| 1457 | value -= (input_section->output_section->vma |
| 1458 | + input_section->output_offset |
| 1459 | + offset); |
| 1460 | |
| 1461 | /* If the sign extension will corrupt the value then we have overflowed. */ |
| 1462 | if (((value & 0xff000000) != 0x0) && ((value & 0xff000000) != 0xff000000)) |
| 1463 | return bfd_reloc_overflow; |
| 1464 | |
| 1465 | /* Only the bottom 24 bits of the PC are valid */ |
| 1466 | value = SEXT24 (value); |
| 1467 | break; |
| 1468 | |
| 1469 | case R_V850_HI16_S: |
| 1470 | case R_V850_HI16: |
| 1471 | case R_V850_LO16: |
| 1472 | case R_V850_16: |
| 1473 | case R_V850_32: |
| 1474 | case R_V850_8: |
| 1475 | break; |
| 1476 | |
| 1477 | case R_V850_ZDA_15_16_OFFSET: |
| 1478 | case R_V850_ZDA_16_16_OFFSET: |
| 1479 | case R_V850_ZDA_16_16_SPLIT_OFFSET: |
| 1480 | if (sym_sec == NULL) |
| 1481 | return bfd_reloc_undefined; |
| 1482 | |
| 1483 | value -= sym_sec->output_section->vma; |
| 1484 | break; |
| 1485 | |
| 1486 | case R_V850_SDA_15_16_OFFSET: |
| 1487 | case R_V850_SDA_16_16_OFFSET: |
| 1488 | case R_V850_SDA_16_16_SPLIT_OFFSET: |
| 1489 | { |
| 1490 | unsigned long gp; |
| 1491 | struct bfd_link_hash_entry * h; |
| 1492 | |
| 1493 | if (sym_sec == NULL) |
| 1494 | return bfd_reloc_undefined; |
| 1495 | |
| 1496 | /* Get the value of __gp. */ |
| 1497 | h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true); |
| 1498 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1499 | || h->type != bfd_link_hash_defined) |
| 1500 | return bfd_reloc_gp_not_found; |
| 1501 | |
| 1502 | gp = (h->u.def.value |
| 1503 | + h->u.def.section->output_section->vma |
| 1504 | + h->u.def.section->output_offset); |
| 1505 | |
| 1506 | value -= sym_sec->output_section->vma; |
| 1507 | value -= (gp - sym_sec->output_section->vma); |
| 1508 | } |
| 1509 | break; |
| 1510 | |
| 1511 | case R_V850_TDA_4_4_OFFSET: |
| 1512 | case R_V850_TDA_4_5_OFFSET: |
| 1513 | case R_V850_TDA_16_16_OFFSET: |
| 1514 | case R_V850_TDA_7_7_OFFSET: |
| 1515 | case R_V850_TDA_7_8_OFFSET: |
| 1516 | case R_V850_TDA_6_8_OFFSET: |
| 1517 | { |
| 1518 | unsigned long ep; |
| 1519 | struct bfd_link_hash_entry * h; |
| 1520 | |
| 1521 | /* Get the value of __ep. */ |
| 1522 | h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true); |
| 1523 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1524 | || h->type != bfd_link_hash_defined) |
| 1525 | return bfd_reloc_ep_not_found; |
| 1526 | |
| 1527 | ep = (h->u.def.value |
| 1528 | + h->u.def.section->output_section->vma |
| 1529 | + h->u.def.section->output_offset); |
| 1530 | |
| 1531 | value -= ep; |
| 1532 | } |
| 1533 | break; |
| 1534 | |
| 1535 | case R_V850_CALLT_6_7_OFFSET: |
| 1536 | { |
| 1537 | unsigned long ctbp; |
| 1538 | struct bfd_link_hash_entry * h; |
| 1539 | |
| 1540 | /* Get the value of __ctbp. */ |
| 1541 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); |
| 1542 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1543 | || h->type != bfd_link_hash_defined) |
| 1544 | return bfd_reloc_ctbp_not_found; |
| 1545 | |
| 1546 | ctbp = (h->u.def.value |
| 1547 | + h->u.def.section->output_section->vma |
| 1548 | + h->u.def.section->output_offset); |
| 1549 | value -= ctbp; |
| 1550 | } |
| 1551 | break; |
| 1552 | |
| 1553 | case R_V850_CALLT_16_16_OFFSET: |
| 1554 | { |
| 1555 | unsigned long ctbp; |
| 1556 | struct bfd_link_hash_entry * h; |
| 1557 | |
| 1558 | if (sym_sec == NULL) |
| 1559 | return bfd_reloc_undefined; |
| 1560 | |
| 1561 | /* Get the value of __ctbp. */ |
| 1562 | h = bfd_link_hash_lookup (info->hash, "__ctbp", false, false, true); |
| 1563 | if (h == (struct bfd_link_hash_entry *) NULL |
| 1564 | || h->type != bfd_link_hash_defined) |
| 1565 | return bfd_reloc_ctbp_not_found; |
| 1566 | |
| 1567 | ctbp = (h->u.def.value |
| 1568 | + h->u.def.section->output_section->vma |
| 1569 | + h->u.def.section->output_offset); |
| 1570 | |
| 1571 | value -= sym_sec->output_section->vma; |
| 1572 | value -= (ctbp - sym_sec->output_section->vma); |
| 1573 | } |
| 1574 | break; |
| 1575 | |
| 1576 | case R_V850_NONE: |
| 1577 | case R_V850_GNU_VTINHERIT: |
| 1578 | case R_V850_GNU_VTENTRY: |
| 1579 | case R_V850_LONGCALL: |
| 1580 | case R_V850_LONGJUMP: |
| 1581 | case R_V850_ALIGN: |
| 1582 | return bfd_reloc_ok; |
| 1583 | |
| 1584 | default: |
| 1585 | return bfd_reloc_notsupported; |
| 1586 | } |
| 1587 | |
| 1588 | /* Perform the relocation. */ |
| 1589 | return v850_elf_perform_relocation (input_bfd, r_type, value + addend, hit_data); |
| 1590 | } |
| 1591 | \f |
| 1592 | /* Relocate an V850 ELF section. */ |
| 1593 | |
| 1594 | static boolean |
| 1595 | v850_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1596 | contents, relocs, local_syms, local_sections) |
| 1597 | bfd * output_bfd; |
| 1598 | struct bfd_link_info * info; |
| 1599 | bfd * input_bfd; |
| 1600 | asection * input_section; |
| 1601 | bfd_byte * contents; |
| 1602 | Elf_Internal_Rela * relocs; |
| 1603 | Elf_Internal_Sym * local_syms; |
| 1604 | asection ** local_sections; |
| 1605 | { |
| 1606 | Elf_Internal_Shdr * symtab_hdr; |
| 1607 | struct elf_link_hash_entry ** sym_hashes; |
| 1608 | Elf_Internal_Rela * rel; |
| 1609 | Elf_Internal_Rela * relend; |
| 1610 | |
| 1611 | if (info->relocateable) |
| 1612 | return true; |
| 1613 | |
| 1614 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 1615 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1616 | |
| 1617 | if (sym_hashes == NULL) |
| 1618 | { |
| 1619 | info->callbacks->warning |
| 1620 | (info, "no hash table available", |
| 1621 | NULL, input_bfd, input_section, (bfd_vma) 0); |
| 1622 | |
| 1623 | return false; |
| 1624 | } |
| 1625 | |
| 1626 | /* Reset the list of remembered HI16S relocs to empty. */ |
| 1627 | free_hi16s = previous_hi16s; |
| 1628 | previous_hi16s = NULL; |
| 1629 | hi16s_counter = 0; |
| 1630 | |
| 1631 | rel = relocs; |
| 1632 | relend = relocs + input_section->reloc_count; |
| 1633 | for (; rel < relend; rel++) |
| 1634 | { |
| 1635 | int r_type; |
| 1636 | reloc_howto_type * howto; |
| 1637 | unsigned long r_symndx; |
| 1638 | Elf_Internal_Sym * sym; |
| 1639 | asection * sec; |
| 1640 | struct elf_link_hash_entry * h; |
| 1641 | bfd_vma relocation; |
| 1642 | bfd_reloc_status_type r; |
| 1643 | |
| 1644 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1645 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1646 | |
| 1647 | if (r_type == R_V850_GNU_VTENTRY |
| 1648 | || r_type == R_V850_GNU_VTINHERIT) |
| 1649 | continue; |
| 1650 | |
| 1651 | /* This is a final link. */ |
| 1652 | howto = v850_elf_howto_table + r_type; |
| 1653 | h = NULL; |
| 1654 | sym = NULL; |
| 1655 | sec = NULL; |
| 1656 | if (r_symndx < symtab_hdr->sh_info) |
| 1657 | { |
| 1658 | sym = local_syms + r_symndx; |
| 1659 | sec = local_sections[r_symndx]; |
| 1660 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| 1661 | #if 0 |
| 1662 | { |
| 1663 | char * name; |
| 1664 | |
| 1665 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 1666 | name = (name == NULL) ? "<none>" : name; |
| 1667 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", |
| 1668 | sec->name, name, sym->st_name, |
| 1669 | sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend); |
| 1670 | } |
| 1671 | #endif |
| 1672 | } |
| 1673 | else |
| 1674 | { |
| 1675 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1676 | |
| 1677 | while (h->root.type == bfd_link_hash_indirect |
| 1678 | || h->root.type == bfd_link_hash_warning) |
| 1679 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1680 | |
| 1681 | if (h->root.type == bfd_link_hash_defined |
| 1682 | || h->root.type == bfd_link_hash_defweak) |
| 1683 | { |
| 1684 | sec = h->root.u.def.section; |
| 1685 | relocation = (h->root.u.def.value |
| 1686 | + sec->output_section->vma |
| 1687 | + sec->output_offset); |
| 1688 | #if 0 |
| 1689 | fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", |
| 1690 | sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation); |
| 1691 | #endif |
| 1692 | } |
| 1693 | else if (h->root.type == bfd_link_hash_undefweak) |
| 1694 | { |
| 1695 | #if 0 |
| 1696 | fprintf (stderr, "undefined: sec: %s, name: %s\n", |
| 1697 | sec->name, h->root.root.string); |
| 1698 | #endif |
| 1699 | relocation = 0; |
| 1700 | } |
| 1701 | else |
| 1702 | { |
| 1703 | if (! ((*info->callbacks->undefined_symbol) |
| 1704 | (info, h->root.root.string, input_bfd, |
| 1705 | input_section, rel->r_offset, true))) |
| 1706 | return false; |
| 1707 | #if 0 |
| 1708 | fprintf (stderr, "unknown: name: %s\n", h->root.root.string); |
| 1709 | #endif |
| 1710 | relocation = 0; |
| 1711 | } |
| 1712 | } |
| 1713 | |
| 1714 | /* FIXME: We should use the addend, but the COFF relocations don't. */ |
| 1715 | r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1716 | input_section, |
| 1717 | contents, rel->r_offset, |
| 1718 | relocation, rel->r_addend, |
| 1719 | info, sec, h == NULL); |
| 1720 | |
| 1721 | if (r != bfd_reloc_ok) |
| 1722 | { |
| 1723 | const char * name; |
| 1724 | const char * msg = (const char *)0; |
| 1725 | |
| 1726 | if (h != NULL) |
| 1727 | name = h->root.root.string; |
| 1728 | else |
| 1729 | { |
| 1730 | name = (bfd_elf_string_from_elf_section |
| 1731 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1732 | if (name == NULL || *name == '\0') |
| 1733 | name = bfd_section_name (input_bfd, sec); |
| 1734 | } |
| 1735 | |
| 1736 | switch (r) |
| 1737 | { |
| 1738 | case bfd_reloc_overflow: |
| 1739 | if (! ((*info->callbacks->reloc_overflow) |
| 1740 | (info, name, howto->name, (bfd_vma) 0, |
| 1741 | input_bfd, input_section, rel->r_offset))) |
| 1742 | return false; |
| 1743 | break; |
| 1744 | |
| 1745 | case bfd_reloc_undefined: |
| 1746 | if (! ((*info->callbacks->undefined_symbol) |
| 1747 | (info, name, input_bfd, input_section, |
| 1748 | rel->r_offset, true))) |
| 1749 | return false; |
| 1750 | break; |
| 1751 | |
| 1752 | case bfd_reloc_outofrange: |
| 1753 | msg = _("internal error: out of range error"); |
| 1754 | goto common_error; |
| 1755 | |
| 1756 | case bfd_reloc_notsupported: |
| 1757 | msg = _("internal error: unsupported relocation error"); |
| 1758 | goto common_error; |
| 1759 | |
| 1760 | case bfd_reloc_dangerous: |
| 1761 | msg = _("internal error: dangerous relocation"); |
| 1762 | goto common_error; |
| 1763 | |
| 1764 | case bfd_reloc_gp_not_found: |
| 1765 | msg = _("could not locate special linker symbol __gp"); |
| 1766 | goto common_error; |
| 1767 | |
| 1768 | case bfd_reloc_ep_not_found: |
| 1769 | msg = _("could not locate special linker symbol __ep"); |
| 1770 | goto common_error; |
| 1771 | |
| 1772 | case bfd_reloc_ctbp_not_found: |
| 1773 | msg = _("could not locate special linker symbol __ctbp"); |
| 1774 | goto common_error; |
| 1775 | |
| 1776 | default: |
| 1777 | msg = _("internal error: unknown error"); |
| 1778 | /* fall through */ |
| 1779 | |
| 1780 | common_error: |
| 1781 | if (!((*info->callbacks->warning) |
| 1782 | (info, msg, name, input_bfd, input_section, |
| 1783 | rel->r_offset))) |
| 1784 | return false; |
| 1785 | break; |
| 1786 | } |
| 1787 | } |
| 1788 | } |
| 1789 | |
| 1790 | return true; |
| 1791 | } |
| 1792 | |
| 1793 | static boolean |
| 1794 | v850_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| 1795 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1796 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1797 | asection *sec ATTRIBUTE_UNUSED; |
| 1798 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; |
| 1799 | { |
| 1800 | /* No got and plt entries for v850-elf. */ |
| 1801 | return true; |
| 1802 | } |
| 1803 | |
| 1804 | static asection * |
| 1805 | v850_elf_gc_mark_hook (sec, info, rel, h, sym) |
| 1806 | asection *sec; |
| 1807 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1808 | Elf_Internal_Rela *rel; |
| 1809 | struct elf_link_hash_entry *h; |
| 1810 | Elf_Internal_Sym *sym; |
| 1811 | { |
| 1812 | if (h != NULL) |
| 1813 | { |
| 1814 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1815 | { |
| 1816 | case R_V850_GNU_VTINHERIT: |
| 1817 | case R_V850_GNU_VTENTRY: |
| 1818 | break; |
| 1819 | |
| 1820 | default: |
| 1821 | switch (h->root.type) |
| 1822 | { |
| 1823 | case bfd_link_hash_defined: |
| 1824 | case bfd_link_hash_defweak: |
| 1825 | return h->root.u.def.section; |
| 1826 | |
| 1827 | case bfd_link_hash_common: |
| 1828 | return h->root.u.c.p->section; |
| 1829 | |
| 1830 | default: |
| 1831 | break; |
| 1832 | } |
| 1833 | } |
| 1834 | } |
| 1835 | else |
| 1836 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 1837 | |
| 1838 | return NULL; |
| 1839 | } |
| 1840 | |
| 1841 | /* Set the right machine number. */ |
| 1842 | |
| 1843 | static boolean |
| 1844 | v850_elf_object_p (abfd) |
| 1845 | bfd *abfd; |
| 1846 | { |
| 1847 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) |
| 1848 | { |
| 1849 | default: |
| 1850 | case E_V850_ARCH: |
| 1851 | bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850); |
| 1852 | break; |
| 1853 | case E_V850E_ARCH: |
| 1854 | bfd_default_set_arch_mach (abfd, bfd_arch_v850, bfd_mach_v850e); |
| 1855 | break; |
| 1856 | } |
| 1857 | return true; |
| 1858 | } |
| 1859 | |
| 1860 | /* Store the machine number in the flags field. */ |
| 1861 | |
| 1862 | static void |
| 1863 | v850_elf_final_write_processing (abfd, linker) |
| 1864 | bfd * abfd; |
| 1865 | boolean linker ATTRIBUTE_UNUSED; |
| 1866 | { |
| 1867 | unsigned long val; |
| 1868 | |
| 1869 | switch (bfd_get_mach (abfd)) |
| 1870 | { |
| 1871 | default: |
| 1872 | case bfd_mach_v850: val = E_V850_ARCH; break; |
| 1873 | case bfd_mach_v850e: val = E_V850E_ARCH; break; |
| 1874 | } |
| 1875 | |
| 1876 | elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH; |
| 1877 | elf_elfheader (abfd)->e_flags |= val; |
| 1878 | } |
| 1879 | |
| 1880 | /* Function to keep V850 specific file flags. */ |
| 1881 | |
| 1882 | static boolean |
| 1883 | v850_elf_set_private_flags (abfd, flags) |
| 1884 | bfd * abfd; |
| 1885 | flagword flags; |
| 1886 | { |
| 1887 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1888 | || elf_elfheader (abfd)->e_flags == flags); |
| 1889 | |
| 1890 | elf_elfheader (abfd)->e_flags = flags; |
| 1891 | elf_flags_init (abfd) = true; |
| 1892 | return true; |
| 1893 | } |
| 1894 | |
| 1895 | /* Merge backend specific data from an object file |
| 1896 | to the output object file when linking. */ |
| 1897 | static boolean |
| 1898 | v850_elf_merge_private_bfd_data (ibfd, obfd) |
| 1899 | bfd * ibfd; |
| 1900 | bfd * obfd; |
| 1901 | { |
| 1902 | flagword out_flags; |
| 1903 | flagword in_flags; |
| 1904 | |
| 1905 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1906 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1907 | return true; |
| 1908 | |
| 1909 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 1910 | out_flags = elf_elfheader (obfd)->e_flags; |
| 1911 | |
| 1912 | if (! elf_flags_init (obfd)) |
| 1913 | { |
| 1914 | /* If the input is the default architecture then do not |
| 1915 | bother setting the flags for the output architecture, |
| 1916 | instead allow future merges to do this. If no future |
| 1917 | merges ever set these flags then they will retain their |
| 1918 | unitialised values, which surprise surprise, correspond |
| 1919 | to the default values. */ |
| 1920 | if (bfd_get_arch_info (ibfd)->the_default) |
| 1921 | return true; |
| 1922 | |
| 1923 | elf_flags_init (obfd) = true; |
| 1924 | elf_elfheader (obfd)->e_flags = in_flags; |
| 1925 | |
| 1926 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 1927 | && bfd_get_arch_info (obfd)->the_default) |
| 1928 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| 1929 | |
| 1930 | return true; |
| 1931 | } |
| 1932 | |
| 1933 | /* Check flag compatibility. */ |
| 1934 | if (in_flags == out_flags) |
| 1935 | return true; |
| 1936 | |
| 1937 | if ((in_flags & EF_V850_ARCH) != (out_flags & EF_V850_ARCH) |
| 1938 | && (in_flags & EF_V850_ARCH) != E_V850_ARCH) |
| 1939 | _bfd_error_handler (_("%s: Architecture mismatch with previous modules"), |
| 1940 | bfd_archive_filename (ibfd)); |
| 1941 | |
| 1942 | return true; |
| 1943 | } |
| 1944 | |
| 1945 | /* Display the flags field. */ |
| 1946 | |
| 1947 | static boolean |
| 1948 | v850_elf_print_private_bfd_data (abfd, ptr) |
| 1949 | bfd * abfd; |
| 1950 | PTR ptr; |
| 1951 | { |
| 1952 | FILE * file = (FILE *) ptr; |
| 1953 | |
| 1954 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 1955 | |
| 1956 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 1957 | |
| 1958 | /* xgettext:c-format */ |
| 1959 | fprintf (file, _("private flags = %lx: "), elf_elfheader (abfd)->e_flags); |
| 1960 | |
| 1961 | switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH) |
| 1962 | { |
| 1963 | default: |
| 1964 | case E_V850_ARCH: fprintf (file, _("v850 architecture")); break; |
| 1965 | case E_V850E_ARCH: fprintf (file, _("v850e architecture")); break; |
| 1966 | } |
| 1967 | |
| 1968 | fputc ('\n', file); |
| 1969 | |
| 1970 | return true; |
| 1971 | } |
| 1972 | |
| 1973 | /* V850 ELF uses four common sections. One is the usual one, and the |
| 1974 | others are for (small) objects in one of the special data areas: |
| 1975 | small, tiny and zero. All the objects are kept together, and then |
| 1976 | referenced via the gp register, the ep register or the r0 register |
| 1977 | respectively, which yields smaller, faster assembler code. This |
| 1978 | approach is copied from elf32-mips.c. */ |
| 1979 | |
| 1980 | static asection v850_elf_scom_section; |
| 1981 | static asymbol v850_elf_scom_symbol; |
| 1982 | static asymbol * v850_elf_scom_symbol_ptr; |
| 1983 | static asection v850_elf_tcom_section; |
| 1984 | static asymbol v850_elf_tcom_symbol; |
| 1985 | static asymbol * v850_elf_tcom_symbol_ptr; |
| 1986 | static asection v850_elf_zcom_section; |
| 1987 | static asymbol v850_elf_zcom_symbol; |
| 1988 | static asymbol * v850_elf_zcom_symbol_ptr; |
| 1989 | |
| 1990 | /* Given a BFD section, try to locate the |
| 1991 | corresponding ELF section index. */ |
| 1992 | |
| 1993 | static boolean |
| 1994 | v850_elf_section_from_bfd_section (abfd, sec, retval) |
| 1995 | bfd * abfd ATTRIBUTE_UNUSED; |
| 1996 | asection * sec; |
| 1997 | int * retval; |
| 1998 | { |
| 1999 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) |
| 2000 | *retval = SHN_V850_SCOMMON; |
| 2001 | else if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0) |
| 2002 | *retval = SHN_V850_TCOMMON; |
| 2003 | else if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0) |
| 2004 | *retval = SHN_V850_ZCOMMON; |
| 2005 | else |
| 2006 | return false; |
| 2007 | |
| 2008 | return true; |
| 2009 | } |
| 2010 | |
| 2011 | /* Handle the special V850 section numbers that a symbol may use. */ |
| 2012 | |
| 2013 | static void |
| 2014 | v850_elf_symbol_processing (abfd, asym) |
| 2015 | bfd * abfd; |
| 2016 | asymbol * asym; |
| 2017 | { |
| 2018 | elf_symbol_type * elfsym = (elf_symbol_type *) asym; |
| 2019 | unsigned int indx; |
| 2020 | |
| 2021 | indx = elfsym->internal_elf_sym.st_shndx; |
| 2022 | |
| 2023 | /* If the section index is an "ordinary" index, then it may |
| 2024 | refer to a v850 specific section created by the assembler. |
| 2025 | Check the section's type and change the index it matches. |
| 2026 | |
| 2027 | FIXME: Should we alter the st_shndx field as well ? */ |
| 2028 | |
| 2029 | if (indx < elf_numsections (abfd)) |
| 2030 | switch (elf_elfsections(abfd)[indx]->sh_type) |
| 2031 | { |
| 2032 | case SHT_V850_SCOMMON: |
| 2033 | indx = SHN_V850_SCOMMON; |
| 2034 | break; |
| 2035 | |
| 2036 | case SHT_V850_TCOMMON: |
| 2037 | indx = SHN_V850_TCOMMON; |
| 2038 | break; |
| 2039 | |
| 2040 | case SHT_V850_ZCOMMON: |
| 2041 | indx = SHN_V850_ZCOMMON; |
| 2042 | break; |
| 2043 | |
| 2044 | default: |
| 2045 | break; |
| 2046 | } |
| 2047 | |
| 2048 | switch (indx) |
| 2049 | { |
| 2050 | case SHN_V850_SCOMMON: |
| 2051 | if (v850_elf_scom_section.name == NULL) |
| 2052 | { |
| 2053 | /* Initialize the small common section. */ |
| 2054 | v850_elf_scom_section.name = ".scommon"; |
| 2055 | v850_elf_scom_section.flags = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA; |
| 2056 | v850_elf_scom_section.output_section = & v850_elf_scom_section; |
| 2057 | v850_elf_scom_section.symbol = & v850_elf_scom_symbol; |
| 2058 | v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr; |
| 2059 | v850_elf_scom_symbol.name = ".scommon"; |
| 2060 | v850_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| 2061 | v850_elf_scom_symbol.section = & v850_elf_scom_section; |
| 2062 | v850_elf_scom_symbol_ptr = & v850_elf_scom_symbol; |
| 2063 | } |
| 2064 | asym->section = & v850_elf_scom_section; |
| 2065 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2066 | break; |
| 2067 | |
| 2068 | case SHN_V850_TCOMMON: |
| 2069 | if (v850_elf_tcom_section.name == NULL) |
| 2070 | { |
| 2071 | /* Initialize the tcommon section. */ |
| 2072 | v850_elf_tcom_section.name = ".tcommon"; |
| 2073 | v850_elf_tcom_section.flags = SEC_IS_COMMON; |
| 2074 | v850_elf_tcom_section.output_section = & v850_elf_tcom_section; |
| 2075 | v850_elf_tcom_section.symbol = & v850_elf_tcom_symbol; |
| 2076 | v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr; |
| 2077 | v850_elf_tcom_symbol.name = ".tcommon"; |
| 2078 | v850_elf_tcom_symbol.flags = BSF_SECTION_SYM; |
| 2079 | v850_elf_tcom_symbol.section = & v850_elf_tcom_section; |
| 2080 | v850_elf_tcom_symbol_ptr = & v850_elf_tcom_symbol; |
| 2081 | } |
| 2082 | asym->section = & v850_elf_tcom_section; |
| 2083 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2084 | break; |
| 2085 | |
| 2086 | case SHN_V850_ZCOMMON: |
| 2087 | if (v850_elf_zcom_section.name == NULL) |
| 2088 | { |
| 2089 | /* Initialize the zcommon section. */ |
| 2090 | v850_elf_zcom_section.name = ".zcommon"; |
| 2091 | v850_elf_zcom_section.flags = SEC_IS_COMMON; |
| 2092 | v850_elf_zcom_section.output_section = & v850_elf_zcom_section; |
| 2093 | v850_elf_zcom_section.symbol = & v850_elf_zcom_symbol; |
| 2094 | v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr; |
| 2095 | v850_elf_zcom_symbol.name = ".zcommon"; |
| 2096 | v850_elf_zcom_symbol.flags = BSF_SECTION_SYM; |
| 2097 | v850_elf_zcom_symbol.section = & v850_elf_zcom_section; |
| 2098 | v850_elf_zcom_symbol_ptr = & v850_elf_zcom_symbol; |
| 2099 | } |
| 2100 | asym->section = & v850_elf_zcom_section; |
| 2101 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2102 | break; |
| 2103 | } |
| 2104 | } |
| 2105 | |
| 2106 | /* Hook called by the linker routine which adds symbols from an object |
| 2107 | file. We must handle the special v850 section numbers here. */ |
| 2108 | |
| 2109 | static boolean |
| 2110 | v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 2111 | bfd * abfd; |
| 2112 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
| 2113 | const Elf_Internal_Sym * sym; |
| 2114 | const char ** namep ATTRIBUTE_UNUSED; |
| 2115 | flagword * flagsp ATTRIBUTE_UNUSED; |
| 2116 | asection ** secp; |
| 2117 | bfd_vma * valp; |
| 2118 | { |
| 2119 | unsigned int indx = sym->st_shndx; |
| 2120 | |
| 2121 | /* If the section index is an "ordinary" index, then it may |
| 2122 | refer to a v850 specific section created by the assembler. |
| 2123 | Check the section's type and change the index it matches. |
| 2124 | |
| 2125 | FIXME: Should we alter the st_shndx field as well ? */ |
| 2126 | |
| 2127 | if (indx < elf_numsections (abfd)) |
| 2128 | switch (elf_elfsections(abfd)[indx]->sh_type) |
| 2129 | { |
| 2130 | case SHT_V850_SCOMMON: |
| 2131 | indx = SHN_V850_SCOMMON; |
| 2132 | break; |
| 2133 | |
| 2134 | case SHT_V850_TCOMMON: |
| 2135 | indx = SHN_V850_TCOMMON; |
| 2136 | break; |
| 2137 | |
| 2138 | case SHT_V850_ZCOMMON: |
| 2139 | indx = SHN_V850_ZCOMMON; |
| 2140 | break; |
| 2141 | |
| 2142 | default: |
| 2143 | break; |
| 2144 | } |
| 2145 | |
| 2146 | switch (indx) |
| 2147 | { |
| 2148 | case SHN_V850_SCOMMON: |
| 2149 | *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| 2150 | (*secp)->flags |= SEC_IS_COMMON; |
| 2151 | *valp = sym->st_size; |
| 2152 | break; |
| 2153 | |
| 2154 | case SHN_V850_TCOMMON: |
| 2155 | *secp = bfd_make_section_old_way (abfd, ".tcommon"); |
| 2156 | (*secp)->flags |= SEC_IS_COMMON; |
| 2157 | *valp = sym->st_size; |
| 2158 | break; |
| 2159 | |
| 2160 | case SHN_V850_ZCOMMON: |
| 2161 | *secp = bfd_make_section_old_way (abfd, ".zcommon"); |
| 2162 | (*secp)->flags |= SEC_IS_COMMON; |
| 2163 | *valp = sym->st_size; |
| 2164 | break; |
| 2165 | } |
| 2166 | |
| 2167 | return true; |
| 2168 | } |
| 2169 | |
| 2170 | static boolean |
| 2171 | v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec) |
| 2172 | bfd * abfd ATTRIBUTE_UNUSED; |
| 2173 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
| 2174 | const char * name ATTRIBUTE_UNUSED; |
| 2175 | Elf_Internal_Sym * sym; |
| 2176 | asection * input_sec; |
| 2177 | { |
| 2178 | /* If we see a common symbol, which implies a relocatable link, then |
| 2179 | if a symbol was in a special common section in an input file, mark |
| 2180 | it as a special common in the output file. */ |
| 2181 | |
| 2182 | if (sym->st_shndx == SHN_COMMON) |
| 2183 | { |
| 2184 | if (strcmp (input_sec->name, ".scommon") == 0) |
| 2185 | sym->st_shndx = SHN_V850_SCOMMON; |
| 2186 | else if (strcmp (input_sec->name, ".tcommon") == 0) |
| 2187 | sym->st_shndx = SHN_V850_TCOMMON; |
| 2188 | else if (strcmp (input_sec->name, ".zcommon") == 0) |
| 2189 | sym->st_shndx = SHN_V850_ZCOMMON; |
| 2190 | } |
| 2191 | |
| 2192 | return true; |
| 2193 | } |
| 2194 | |
| 2195 | static boolean |
| 2196 | v850_elf_section_from_shdr (abfd, hdr, name) |
| 2197 | bfd * abfd; |
| 2198 | Elf_Internal_Shdr * hdr; |
| 2199 | const char * name; |
| 2200 | { |
| 2201 | /* There ought to be a place to keep ELF backend specific flags, but |
| 2202 | at the moment there isn't one. We just keep track of the |
| 2203 | sections by their name, instead. */ |
| 2204 | |
| 2205 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 2206 | return false; |
| 2207 | |
| 2208 | switch (hdr->sh_type) |
| 2209 | { |
| 2210 | case SHT_V850_SCOMMON: |
| 2211 | case SHT_V850_TCOMMON: |
| 2212 | case SHT_V850_ZCOMMON: |
| 2213 | if (! bfd_set_section_flags (abfd, hdr->bfd_section, |
| 2214 | (bfd_get_section_flags (abfd, |
| 2215 | hdr->bfd_section) |
| 2216 | | SEC_IS_COMMON))) |
| 2217 | return false; |
| 2218 | } |
| 2219 | |
| 2220 | return true; |
| 2221 | } |
| 2222 | |
| 2223 | /* Set the correct type for a V850 ELF section. We do this |
| 2224 | by the section name, which is a hack, but ought to work. */ |
| 2225 | |
| 2226 | static boolean |
| 2227 | v850_elf_fake_sections (abfd, hdr, sec) |
| 2228 | bfd * abfd ATTRIBUTE_UNUSED; |
| 2229 | Elf32_Internal_Shdr * hdr; |
| 2230 | asection * sec; |
| 2231 | { |
| 2232 | register const char * name; |
| 2233 | |
| 2234 | name = bfd_get_section_name (abfd, sec); |
| 2235 | |
| 2236 | if (strcmp (name, ".scommon") == 0) |
| 2237 | { |
| 2238 | hdr->sh_type = SHT_V850_SCOMMON; |
| 2239 | } |
| 2240 | else if (strcmp (name, ".tcommon") == 0) |
| 2241 | { |
| 2242 | hdr->sh_type = SHT_V850_TCOMMON; |
| 2243 | } |
| 2244 | else if (strcmp (name, ".zcommon") == 0) |
| 2245 | hdr->sh_type = SHT_V850_ZCOMMON; |
| 2246 | |
| 2247 | return true; |
| 2248 | } |
| 2249 | |
| 2250 | /* Delete some bytes from a section while relaxing. */ |
| 2251 | |
| 2252 | static boolean |
| 2253 | v850_elf_relax_delete_bytes (abfd, sec, addr, toaddr, count) |
| 2254 | bfd * abfd; |
| 2255 | asection * sec; |
| 2256 | bfd_vma addr; |
| 2257 | bfd_vma toaddr; |
| 2258 | int count; |
| 2259 | { |
| 2260 | Elf_Internal_Shdr * symtab_hdr; |
| 2261 | Elf32_External_Sym * extsyms; |
| 2262 | Elf32_External_Sym * esym; |
| 2263 | Elf32_External_Sym * esymend; |
| 2264 | int index; |
| 2265 | unsigned int sec_shndx; |
| 2266 | bfd_byte * contents; |
| 2267 | Elf_Internal_Rela * irel; |
| 2268 | Elf_Internal_Rela * irelend; |
| 2269 | struct elf_link_hash_entry * sym_hash; |
| 2270 | Elf_Internal_Shdr * shndx_hdr; |
| 2271 | Elf_External_Sym_Shndx * shndx; |
| 2272 | |
| 2273 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2274 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| 2275 | |
| 2276 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 2277 | |
| 2278 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2279 | |
| 2280 | /* The deletion must stop at the next ALIGN reloc for an alignment |
| 2281 | power larger than the number of bytes we are deleting. */ |
| 2282 | |
| 2283 | /* Actually delete the bytes. */ |
| 2284 | #if (DEBUG_RELAX & 2) |
| 2285 | fprintf (stderr, "relax_delete: contents: sec: %s %p .. %p %x\n", |
| 2286 | sec->name, addr, toaddr, count ); |
| 2287 | #endif |
| 2288 | memmove (contents + addr, contents + addr + count, |
| 2289 | toaddr - addr - count); |
| 2290 | memset (contents + toaddr-count, 0, count); |
| 2291 | |
| 2292 | /* Adjust all the relocs. */ |
| 2293 | irel = elf_section_data (sec)->relocs; |
| 2294 | irelend = irel + sec->reloc_count; |
| 2295 | shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
| 2296 | shndx = (Elf_External_Sym_Shndx *) shndx_hdr->contents; |
| 2297 | |
| 2298 | for (; irel < irelend; irel++) |
| 2299 | { |
| 2300 | bfd_vma raddr, paddr, symval; |
| 2301 | Elf_Internal_Sym isym; |
| 2302 | |
| 2303 | /* Get the new reloc address. */ |
| 2304 | raddr = irel->r_offset; |
| 2305 | if ((raddr >= (addr + count) && raddr < toaddr)) |
| 2306 | irel->r_offset -= count; |
| 2307 | |
| 2308 | if (raddr >= addr && raddr < addr + count) |
| 2309 | { |
| 2310 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2311 | (int) R_V850_NONE); |
| 2312 | continue; |
| 2313 | } |
| 2314 | |
| 2315 | if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN) |
| 2316 | continue; |
| 2317 | |
| 2318 | bfd_elf32_swap_symbol_in (abfd, |
| 2319 | extsyms + ELF32_R_SYM (irel->r_info), |
| 2320 | shndx ? shndx + ELF32_R_SYM (irel->r_info) : NULL, |
| 2321 | & isym); |
| 2322 | |
| 2323 | if (isym.st_shndx != sec_shndx) |
| 2324 | continue; |
| 2325 | |
| 2326 | /* Get the value of the symbol referred to by the reloc. */ |
| 2327 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2328 | { |
| 2329 | symval = isym.st_value; |
| 2330 | #if (DEBUG_RELAX & 2) |
| 2331 | { |
| 2332 | char * name = bfd_elf_string_from_elf_section |
| 2333 | (abfd, symtab_hdr->sh_link, isym.st_name); |
| 2334 | fprintf (stderr, |
| 2335 | "relax_delete: local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", |
| 2336 | sec->name, name, isym.st_name, |
| 2337 | sec->output_section->vma, sec->output_offset, |
| 2338 | isym.st_value, irel->r_addend); |
| 2339 | } |
| 2340 | #endif |
| 2341 | } |
| 2342 | else |
| 2343 | { |
| 2344 | unsigned long indx; |
| 2345 | struct elf_link_hash_entry * h; |
| 2346 | |
| 2347 | /* An external symbol. */ |
| 2348 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2349 | |
| 2350 | h = elf_sym_hashes (abfd) [indx]; |
| 2351 | BFD_ASSERT (h != NULL); |
| 2352 | |
| 2353 | symval = h->root.u.def.value; |
| 2354 | #if (DEBUG_RELAX & 2) |
| 2355 | fprintf (stderr, |
| 2356 | "relax_delete: defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n", |
| 2357 | sec->name, h->root.root.string, h->root.u.def.value, |
| 2358 | sec->output_section->vma, sec->output_offset, irel->r_addend); |
| 2359 | #endif |
| 2360 | } |
| 2361 | |
| 2362 | paddr = symval + irel->r_addend; |
| 2363 | |
| 2364 | if ( (symval >= addr + count && symval < toaddr) |
| 2365 | && (paddr < addr + count || paddr >= toaddr)) |
| 2366 | irel->r_addend += count; |
| 2367 | else if ( (symval < addr + count || symval >= toaddr) |
| 2368 | && (paddr >= addr + count && paddr < toaddr)) |
| 2369 | irel->r_addend -= count; |
| 2370 | } |
| 2371 | |
| 2372 | /* Adjust the local symbols defined in this section. */ |
| 2373 | esym = extsyms; |
| 2374 | esymend = esym + symtab_hdr->sh_info; |
| 2375 | |
| 2376 | for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL)) |
| 2377 | { |
| 2378 | Elf_Internal_Sym isym; |
| 2379 | |
| 2380 | bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym); |
| 2381 | |
| 2382 | if (isym.st_shndx == sec_shndx |
| 2383 | && isym.st_value >= addr + count |
| 2384 | && isym.st_value < toaddr) |
| 2385 | { |
| 2386 | isym.st_value -= count; |
| 2387 | |
| 2388 | if (isym.st_value + isym.st_size >= toaddr) |
| 2389 | isym.st_size += count; |
| 2390 | |
| 2391 | bfd_elf32_swap_symbol_out (abfd, & isym, shndx, esym); |
| 2392 | } |
| 2393 | else if (isym.st_shndx == sec_shndx |
| 2394 | && isym.st_value < addr + count) |
| 2395 | { |
| 2396 | if (isym.st_value+isym.st_size >= addr + count |
| 2397 | && isym.st_value+isym.st_size < toaddr) |
| 2398 | isym.st_size -= count; |
| 2399 | |
| 2400 | if (isym.st_value >= addr |
| 2401 | && isym.st_value < addr + count) |
| 2402 | isym.st_value = addr; |
| 2403 | |
| 2404 | bfd_elf32_swap_symbol_out (abfd, & isym, shndx, esym); |
| 2405 | } |
| 2406 | } |
| 2407 | |
| 2408 | /* Now adjust the global symbols defined in this section. */ |
| 2409 | esym = extsyms + symtab_hdr->sh_info; |
| 2410 | esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); |
| 2411 | |
| 2412 | for (index = 0; esym < esymend; esym ++, index ++) |
| 2413 | { |
| 2414 | Elf_Internal_Sym isym; |
| 2415 | |
| 2416 | bfd_elf32_swap_symbol_in (abfd, esym, shndx, & isym); |
| 2417 | sym_hash = elf_sym_hashes (abfd) [index]; |
| 2418 | |
| 2419 | if (isym.st_shndx == sec_shndx |
| 2420 | && ((sym_hash)->root.type == bfd_link_hash_defined |
| 2421 | || (sym_hash)->root.type == bfd_link_hash_defweak) |
| 2422 | && (sym_hash)->root.u.def.section == sec |
| 2423 | && (sym_hash)->root.u.def.value >= addr + count |
| 2424 | && (sym_hash)->root.u.def.value < toaddr) |
| 2425 | { |
| 2426 | if ((sym_hash)->root.u.def.value + isym.st_size >= toaddr) |
| 2427 | { |
| 2428 | isym.st_size += count; |
| 2429 | bfd_elf32_swap_symbol_out (abfd, & isym, shndx, esym); |
| 2430 | } |
| 2431 | |
| 2432 | (sym_hash)->root.u.def.value -= count; |
| 2433 | } |
| 2434 | else if (isym.st_shndx == sec_shndx |
| 2435 | && ((sym_hash)->root.type == bfd_link_hash_defined |
| 2436 | || (sym_hash)->root.type == bfd_link_hash_defweak) |
| 2437 | && (sym_hash)->root.u.def.section == sec |
| 2438 | && (sym_hash)->root.u.def.value < addr + count) |
| 2439 | { |
| 2440 | if ((sym_hash)->root.u.def.value+isym.st_size >= addr + count |
| 2441 | && (sym_hash)->root.u.def.value+isym.st_size < toaddr) |
| 2442 | isym.st_size -= count; |
| 2443 | |
| 2444 | if ((sym_hash)->root.u.def.value >= addr |
| 2445 | && (sym_hash)->root.u.def.value < addr + count) |
| 2446 | (sym_hash)->root.u.def.value = addr; |
| 2447 | |
| 2448 | bfd_elf32_swap_symbol_out (abfd, & isym, shndx, esym); |
| 2449 | } |
| 2450 | |
| 2451 | if (shndx) |
| 2452 | ++ shndx; |
| 2453 | } |
| 2454 | |
| 2455 | return true; |
| 2456 | } |
| 2457 | |
| 2458 | #define NOP_OPCODE (0x0000) |
| 2459 | #define MOVHI 0x0640 /* 4byte */ |
| 2460 | #define MOVHI_MASK 0x07e0 |
| 2461 | #define MOVHI_R1(insn) ((insn) & 0x1f) /* 4byte */ |
| 2462 | #define MOVHI_R2(insn) ((insn) >> 11) |
| 2463 | #define MOVEA 0x0620 /* 2byte */ |
| 2464 | #define MOVEA_MASK 0x07e0 |
| 2465 | #define MOVEA_R1(insn) ((insn) & 0x1f) |
| 2466 | #define MOVEA_R2(insn) ((insn) >> 11) |
| 2467 | #define JARL_4 0x00040780 /* 4byte */ |
| 2468 | #define JARL_4_MASK 0xFFFF07FF |
| 2469 | #define JARL_R2(insn) (int)(((insn) & (~JARL_4_MASK)) >> 11) |
| 2470 | #define ADD_I 0x0240 /* 2byte */ |
| 2471 | #define ADD_I_MASK 0x07e0 |
| 2472 | #define ADD_I5(insn) ((((insn) & 0x001f) << 11) >> 11) /* 2byte */ |
| 2473 | #define ADD_R2(insn) ((insn) >> 11) |
| 2474 | #define JMP_R 0x0060 /* 2byte */ |
| 2475 | #define JMP_R_MASK 0xFFE0 |
| 2476 | #define JMP_R1(insn) ((insn) & 0x1f) |
| 2477 | |
| 2478 | static boolean |
| 2479 | v850_elf_relax_section (abfd, sec, link_info, again) |
| 2480 | bfd * abfd; |
| 2481 | asection * sec; |
| 2482 | struct bfd_link_info * link_info; |
| 2483 | boolean * again; |
| 2484 | { |
| 2485 | Elf_Internal_Shdr * symtab_hdr; |
| 2486 | Elf_Internal_Rela * internal_relocs; |
| 2487 | Elf_Internal_Rela * irel; |
| 2488 | Elf_Internal_Rela * irelend; |
| 2489 | Elf_Internal_Rela * irelalign = NULL; |
| 2490 | Elf_Internal_Sym * isymbuf = NULL; |
| 2491 | bfd_byte * contents = NULL; |
| 2492 | bfd_vma addr = 0; |
| 2493 | bfd_vma toaddr; |
| 2494 | int align_pad_size = 0; |
| 2495 | boolean result = true; |
| 2496 | |
| 2497 | * again = false; |
| 2498 | |
| 2499 | if (link_info->relocateable |
| 2500 | || (sec->flags & SEC_RELOC) == 0 |
| 2501 | || sec->reloc_count == 0) |
| 2502 | return true; |
| 2503 | |
| 2504 | /* If this is the first time we have been called |
| 2505 | for this section, initialize the cooked size. */ |
| 2506 | if (sec->_cooked_size == 0) |
| 2507 | sec->_cooked_size = sec->_raw_size; |
| 2508 | |
| 2509 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 2510 | |
| 2511 | internal_relocs = (_bfd_elf32_link_read_relocs |
| 2512 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 2513 | link_info->keep_memory)); |
| 2514 | if (internal_relocs == NULL) |
| 2515 | goto error_return; |
| 2516 | |
| 2517 | irelend = internal_relocs + sec->reloc_count; |
| 2518 | |
| 2519 | while (addr < sec->_cooked_size) |
| 2520 | { |
| 2521 | toaddr = sec->_cooked_size; |
| 2522 | |
| 2523 | for (irel = internal_relocs; irel < irelend; irel ++) |
| 2524 | if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN |
| 2525 | && irel->r_offset > addr |
| 2526 | && irel->r_offset < toaddr) |
| 2527 | toaddr = irel->r_offset; |
| 2528 | |
| 2529 | #ifdef DEBUG_RELAX |
| 2530 | fprintf (stderr, "relax region 0x%x to 0x%x align pad %d\n", |
| 2531 | addr, toaddr, align_pad_size); |
| 2532 | #endif |
| 2533 | if (irelalign) |
| 2534 | { |
| 2535 | bfd_vma alignto; |
| 2536 | bfd_vma alignmoveto; |
| 2537 | |
| 2538 | alignmoveto = BFD_ALIGN (addr - align_pad_size, 1 << irelalign->r_addend); |
| 2539 | alignto = BFD_ALIGN (addr, 1 << irelalign->r_addend); |
| 2540 | |
| 2541 | if (alignmoveto < alignto) |
| 2542 | { |
| 2543 | unsigned int i; |
| 2544 | |
| 2545 | align_pad_size = alignto - alignmoveto; |
| 2546 | #ifdef DEBUG_RELAX |
| 2547 | fprintf (stderr, "relax move region 0x%x to 0x%x delete size 0x%x\n", |
| 2548 | alignmoveto, toaddr, align_pad_size); |
| 2549 | #endif |
| 2550 | if (!v850_elf_relax_delete_bytes (abfd, sec, alignmoveto, |
| 2551 | toaddr, align_pad_size)) |
| 2552 | goto error_return; |
| 2553 | |
| 2554 | for (i = BFD_ALIGN (toaddr - align_pad_size, 1); |
| 2555 | (i + 1) < toaddr; i += 2) |
| 2556 | bfd_put_16 (abfd, NOP_OPCODE, contents + i); |
| 2557 | |
| 2558 | addr = alignmoveto; |
| 2559 | } |
| 2560 | else |
| 2561 | align_pad_size = 0; |
| 2562 | } |
| 2563 | |
| 2564 | for (irel = internal_relocs; irel < irelend; irel++) |
| 2565 | { |
| 2566 | bfd_vma laddr; |
| 2567 | bfd_vma addend; |
| 2568 | bfd_vma symval; |
| 2569 | int insn[5]; |
| 2570 | int no_match = -1; |
| 2571 | Elf_Internal_Rela * hi_irelfn; |
| 2572 | Elf_Internal_Rela * lo_irelfn; |
| 2573 | Elf_Internal_Rela * irelcall; |
| 2574 | bfd_signed_vma foff; |
| 2575 | |
| 2576 | if (! (irel->r_offset >= addr && irel->r_offset < toaddr |
| 2577 | && (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL |
| 2578 | || ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP))) |
| 2579 | continue; |
| 2580 | |
| 2581 | #ifdef DEBUG_RELAX |
| 2582 | fprintf (stderr, "relax check r_info 0x%x r_offset 0x%x r_addend 0x%x\n", |
| 2583 | irel->r_info, |
| 2584 | irel->r_offset, |
| 2585 | irel->r_addend ); |
| 2586 | #endif |
| 2587 | |
| 2588 | /* Get the section contents. */ |
| 2589 | if (contents == NULL) |
| 2590 | { |
| 2591 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2592 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2593 | else |
| 2594 | { |
| 2595 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); |
| 2596 | if (contents == NULL) |
| 2597 | goto error_return; |
| 2598 | |
| 2599 | if (! bfd_get_section_contents (abfd, sec, contents, |
| 2600 | (file_ptr) 0, sec->_raw_size)) |
| 2601 | goto error_return; |
| 2602 | } |
| 2603 | } |
| 2604 | |
| 2605 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 2606 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 2607 | { |
| 2608 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2609 | if (isymbuf == NULL) |
| 2610 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2611 | symtab_hdr->sh_info, 0, |
| 2612 | NULL, NULL, NULL); |
| 2613 | if (isymbuf == NULL) |
| 2614 | goto error_return; |
| 2615 | } |
| 2616 | |
| 2617 | laddr = irel->r_offset; |
| 2618 | |
| 2619 | if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGCALL) |
| 2620 | { |
| 2621 | /* Check code for -mlong-calls output. */ |
| 2622 | if (laddr + 16 <= (bfd_vma) sec->_raw_size) |
| 2623 | { |
| 2624 | insn[0] = bfd_get_16 (abfd, contents + laddr); |
| 2625 | insn[1] = bfd_get_16 (abfd, contents + laddr + 4); |
| 2626 | insn[2] = bfd_get_32 (abfd, contents + laddr + 8); |
| 2627 | insn[3] = bfd_get_16 (abfd, contents + laddr + 12); |
| 2628 | insn[4] = bfd_get_16 (abfd, contents + laddr + 14); |
| 2629 | |
| 2630 | if ((insn[0] & MOVHI_MASK) != MOVHI |
| 2631 | || MOVHI_R1 (insn[0]) != 0) |
| 2632 | no_match = 0; |
| 2633 | |
| 2634 | if (no_match < 0 |
| 2635 | && ((insn[1] & MOVEA_MASK) != MOVEA |
| 2636 | || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1]))) |
| 2637 | no_match = 1; |
| 2638 | |
| 2639 | if (no_match < 0 |
| 2640 | && (insn[2] & JARL_4_MASK) != JARL_4) |
| 2641 | no_match = 2; |
| 2642 | |
| 2643 | if (no_match < 0 |
| 2644 | && ((insn[3] & ADD_I_MASK) != ADD_I |
| 2645 | || ADD_I5 (insn[3]) != 4 |
| 2646 | || JARL_R2 (insn[2]) != ADD_R2 (insn[3]))) |
| 2647 | no_match = 3; |
| 2648 | |
| 2649 | if (no_match < 0 |
| 2650 | && ((insn[4] & JMP_R_MASK) != JMP_R |
| 2651 | || MOVEA_R2 (insn[1]) != JMP_R1 (insn[4]))) |
| 2652 | no_match = 4; |
| 2653 | } |
| 2654 | else |
| 2655 | { |
| 2656 | ((*_bfd_error_handler) |
| 2657 | ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insns", |
| 2658 | bfd_get_filename (abfd), (unsigned long) irel->r_offset)); |
| 2659 | |
| 2660 | continue; |
| 2661 | } |
| 2662 | |
| 2663 | if (no_match >= 0) |
| 2664 | { |
| 2665 | ((*_bfd_error_handler) |
| 2666 | ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized insn 0x%x", |
| 2667 | bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match])); |
| 2668 | |
| 2669 | continue; |
| 2670 | } |
| 2671 | |
| 2672 | /* Get the reloc for the address from which the register is |
| 2673 | being loaded. This reloc will tell us which function is |
| 2674 | actually being called. */ |
| 2675 | for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++) |
| 2676 | if (hi_irelfn->r_offset == laddr + 2 |
| 2677 | && ELF32_R_TYPE (hi_irelfn->r_info) |
| 2678 | == (int) R_V850_HI16_S) |
| 2679 | break; |
| 2680 | |
| 2681 | for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++) |
| 2682 | if (lo_irelfn->r_offset == laddr + 6 |
| 2683 | && ELF32_R_TYPE (lo_irelfn->r_info) |
| 2684 | == (int) R_V850_LO16) |
| 2685 | break; |
| 2686 | |
| 2687 | for (irelcall = internal_relocs; irelcall < irelend; irelcall ++) |
| 2688 | if (irelcall->r_offset == laddr + 8 |
| 2689 | && ELF32_R_TYPE (irelcall->r_info) |
| 2690 | == (int) R_V850_22_PCREL) |
| 2691 | break; |
| 2692 | |
| 2693 | if ( hi_irelfn == irelend |
| 2694 | || lo_irelfn == irelend |
| 2695 | || irelcall == irelend) |
| 2696 | { |
| 2697 | ((*_bfd_error_handler) |
| 2698 | ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc", |
| 2699 | bfd_get_filename (abfd), (unsigned long) irel->r_offset )); |
| 2700 | |
| 2701 | continue; |
| 2702 | } |
| 2703 | |
| 2704 | if (ELF32_R_SYM (irelcall->r_info) < symtab_hdr->sh_info) |
| 2705 | { |
| 2706 | Elf_Internal_Sym * isym; |
| 2707 | |
| 2708 | /* A local symbol. */ |
| 2709 | isym = isymbuf + ELF32_R_SYM (irelcall->r_info); |
| 2710 | |
| 2711 | symval = isym->st_value; |
| 2712 | } |
| 2713 | else |
| 2714 | { |
| 2715 | unsigned long indx; |
| 2716 | struct elf_link_hash_entry * h; |
| 2717 | |
| 2718 | /* An external symbol. */ |
| 2719 | indx = ELF32_R_SYM (irelcall->r_info) - symtab_hdr->sh_info; |
| 2720 | h = elf_sym_hashes (abfd)[indx]; |
| 2721 | BFD_ASSERT (h != NULL); |
| 2722 | |
| 2723 | if ( h->root.type != bfd_link_hash_defined |
| 2724 | && h->root.type != bfd_link_hash_defweak) |
| 2725 | /* This appears to be a reference to an undefined |
| 2726 | symbol. Just ignore it--it will be caught by the |
| 2727 | regular reloc processing. */ |
| 2728 | continue; |
| 2729 | |
| 2730 | symval = h->root.u.def.value; |
| 2731 | } |
| 2732 | |
| 2733 | if (symval + irelcall->r_addend != irelcall->r_offset + 4) |
| 2734 | { |
| 2735 | ((*_bfd_error_handler) |
| 2736 | ("%s: 0x%lx: warning: R_V850_LONGCALL points to unrecognized reloc 0x%lx", |
| 2737 | bfd_get_filename (abfd), (unsigned long) irel->r_offset, irelcall->r_offset )); |
| 2738 | |
| 2739 | continue; |
| 2740 | } |
| 2741 | |
| 2742 | /* Get the value of the symbol referred to by the reloc. */ |
| 2743 | if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info) |
| 2744 | { |
| 2745 | Elf_Internal_Sym * isym; |
| 2746 | asection * sym_sec; |
| 2747 | |
| 2748 | /* A local symbol. */ |
| 2749 | isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info); |
| 2750 | |
| 2751 | if (isym->st_shndx == SHN_UNDEF) |
| 2752 | sym_sec = bfd_und_section_ptr; |
| 2753 | else if (isym->st_shndx == SHN_ABS) |
| 2754 | sym_sec = bfd_abs_section_ptr; |
| 2755 | else if (isym->st_shndx == SHN_COMMON) |
| 2756 | sym_sec = bfd_com_section_ptr; |
| 2757 | else |
| 2758 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2759 | symval = (isym->st_value |
| 2760 | + sym_sec->output_section->vma |
| 2761 | + sym_sec->output_offset); |
| 2762 | } |
| 2763 | else |
| 2764 | { |
| 2765 | unsigned long indx; |
| 2766 | struct elf_link_hash_entry * h; |
| 2767 | |
| 2768 | /* An external symbol. */ |
| 2769 | indx = ELF32_R_SYM (hi_irelfn->r_info) - symtab_hdr->sh_info; |
| 2770 | h = elf_sym_hashes (abfd)[indx]; |
| 2771 | BFD_ASSERT (h != NULL); |
| 2772 | |
| 2773 | if ( h->root.type != bfd_link_hash_defined |
| 2774 | && h->root.type != bfd_link_hash_defweak) |
| 2775 | /* This appears to be a reference to an undefined |
| 2776 | symbol. Just ignore it--it will be caught by the |
| 2777 | regular reloc processing. */ |
| 2778 | continue; |
| 2779 | |
| 2780 | symval = (h->root.u.def.value |
| 2781 | + h->root.u.def.section->output_section->vma |
| 2782 | + h->root.u.def.section->output_offset); |
| 2783 | } |
| 2784 | |
| 2785 | addend = irel->r_addend; |
| 2786 | |
| 2787 | foff = (symval + addend |
| 2788 | - (irel->r_offset |
| 2789 | + sec->output_section->vma |
| 2790 | + sec->output_offset |
| 2791 | + 4)); |
| 2792 | #ifdef DEBUG_RELAX |
| 2793 | fprintf (stderr, "relax longcall r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n", |
| 2794 | irel->r_offset, |
| 2795 | (irel->r_offset |
| 2796 | + sec->output_section->vma |
| 2797 | + sec->output_offset), |
| 2798 | symval, addend, foff); |
| 2799 | #endif |
| 2800 | |
| 2801 | if (foff < -0x100000 || foff >= 0x100000) |
| 2802 | /* After all that work, we can't shorten this function call. */ |
| 2803 | continue; |
| 2804 | |
| 2805 | /* For simplicity of coding, we are going to modify the section |
| 2806 | contents, the section relocs, and the BFD symbol table. We |
| 2807 | must tell the rest of the code not to free up this |
| 2808 | information. It would be possible to instead create a table |
| 2809 | of changes which have to be made, as is done in coff-mips.c; |
| 2810 | that would be more work, but would require less memory when |
| 2811 | the linker is run. */ |
| 2812 | elf_section_data (sec)->relocs = internal_relocs; |
| 2813 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2814 | symtab_hdr->contents = (bfd_byte *) isymbuf; |
| 2815 | |
| 2816 | /* Replace the long call with a jarl. */ |
| 2817 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_22_PCREL); |
| 2818 | |
| 2819 | addend = 0; |
| 2820 | |
| 2821 | if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info) |
| 2822 | /* If this needs to be changed because of future relaxing, |
| 2823 | it will be handled here like other internal IND12W |
| 2824 | relocs. */ |
| 2825 | bfd_put_32 (abfd, |
| 2826 | 0x00000780 | (JARL_R2 (insn[2])<<11) | ((addend << 16) & 0xffff) | ((addend >> 16) & 0xf), |
| 2827 | contents + irel->r_offset); |
| 2828 | else |
| 2829 | /* We can't fully resolve this yet, because the external |
| 2830 | symbol value may be changed by future relaxing. |
| 2831 | We let the final link phase handle it. */ |
| 2832 | bfd_put_32 (abfd, 0x00000780 | (JARL_R2 (insn[2])<<11), |
| 2833 | contents + irel->r_offset); |
| 2834 | |
| 2835 | hi_irelfn->r_info = |
| 2836 | ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE); |
| 2837 | lo_irelfn->r_info = |
| 2838 | ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE); |
| 2839 | irelcall->r_info = |
| 2840 | ELF32_R_INFO (ELF32_R_SYM (irelcall->r_info), R_V850_NONE); |
| 2841 | |
| 2842 | if (! v850_elf_relax_delete_bytes (abfd, sec, |
| 2843 | irel->r_offset + 4, toaddr, 12)) |
| 2844 | goto error_return; |
| 2845 | |
| 2846 | align_pad_size += 12; |
| 2847 | } |
| 2848 | else if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_LONGJUMP) |
| 2849 | { |
| 2850 | /* Check code for -mlong-jumps output. */ |
| 2851 | if (laddr + 10 <= (bfd_vma) sec->_raw_size) |
| 2852 | { |
| 2853 | insn[0] = bfd_get_16 (abfd, contents + laddr); |
| 2854 | insn[1] = bfd_get_16 (abfd, contents + laddr + 4); |
| 2855 | insn[2] = bfd_get_16 (abfd, contents + laddr + 8); |
| 2856 | |
| 2857 | if ((insn[0] & MOVHI_MASK) != MOVHI |
| 2858 | || MOVHI_R1 (insn[0]) != 0) |
| 2859 | no_match = 0; |
| 2860 | |
| 2861 | if (no_match < 0 |
| 2862 | && ((insn[1] & MOVEA_MASK) != MOVEA |
| 2863 | || MOVHI_R2 (insn[0]) != MOVEA_R1 (insn[1]))) |
| 2864 | no_match = 1; |
| 2865 | |
| 2866 | if (no_match < 0 |
| 2867 | && ((insn[2] & JMP_R_MASK) != JMP_R |
| 2868 | || MOVEA_R2 (insn[1]) != JMP_R1 (insn[2]))) |
| 2869 | no_match = 4; |
| 2870 | } |
| 2871 | else |
| 2872 | { |
| 2873 | ((*_bfd_error_handler) |
| 2874 | ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insns", |
| 2875 | bfd_get_filename (abfd), (unsigned long) irel->r_offset)); |
| 2876 | |
| 2877 | continue; |
| 2878 | } |
| 2879 | |
| 2880 | if (no_match >= 0) |
| 2881 | { |
| 2882 | ((*_bfd_error_handler) |
| 2883 | ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized insn 0x%x", |
| 2884 | bfd_get_filename (abfd), (unsigned long) irel->r_offset+no_match, insn[no_match])); |
| 2885 | |
| 2886 | continue; |
| 2887 | } |
| 2888 | |
| 2889 | /* Get the reloc for the address from which the register is |
| 2890 | being loaded. This reloc will tell us which function is |
| 2891 | actually being called. */ |
| 2892 | for (hi_irelfn = internal_relocs; hi_irelfn < irelend; hi_irelfn ++) |
| 2893 | if (hi_irelfn->r_offset == laddr + 2 |
| 2894 | && ELF32_R_TYPE (hi_irelfn->r_info) == (int) R_V850_HI16_S) |
| 2895 | break; |
| 2896 | |
| 2897 | for (lo_irelfn = internal_relocs; lo_irelfn < irelend; lo_irelfn ++) |
| 2898 | if (lo_irelfn->r_offset == laddr + 6 |
| 2899 | && ELF32_R_TYPE (lo_irelfn->r_info) == (int) R_V850_LO16) |
| 2900 | break; |
| 2901 | |
| 2902 | if ( hi_irelfn == irelend |
| 2903 | || lo_irelfn == irelend) |
| 2904 | { |
| 2905 | ((*_bfd_error_handler) |
| 2906 | ("%s: 0x%lx: warning: R_V850_LONGJUMP points to unrecognized reloc", |
| 2907 | bfd_get_filename (abfd), (unsigned long) irel->r_offset )); |
| 2908 | |
| 2909 | continue; |
| 2910 | } |
| 2911 | |
| 2912 | /* Get the value of the symbol referred to by the reloc. */ |
| 2913 | if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info) |
| 2914 | { |
| 2915 | Elf_Internal_Sym * isym; |
| 2916 | asection * sym_sec; |
| 2917 | |
| 2918 | /* A local symbol. */ |
| 2919 | isym = isymbuf + ELF32_R_SYM (hi_irelfn->r_info); |
| 2920 | |
| 2921 | if (isym->st_shndx == SHN_UNDEF) |
| 2922 | sym_sec = bfd_und_section_ptr; |
| 2923 | else if (isym->st_shndx == SHN_ABS) |
| 2924 | sym_sec = bfd_abs_section_ptr; |
| 2925 | else if (isym->st_shndx == SHN_COMMON) |
| 2926 | sym_sec = bfd_com_section_ptr; |
| 2927 | else |
| 2928 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2929 | symval = (isym->st_value |
| 2930 | + sym_sec->output_section->vma |
| 2931 | + sym_sec->output_offset); |
| 2932 | #ifdef DEBUG_RELAX |
| 2933 | { |
| 2934 | char * name = bfd_elf_string_from_elf_section |
| 2935 | (abfd, symtab_hdr->sh_link, isym->st_name); |
| 2936 | |
| 2937 | fprintf (stderr, "relax long jump local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", |
| 2938 | sym_sec->name, name, isym->st_name, |
| 2939 | sym_sec->output_section->vma, |
| 2940 | sym_sec->output_offset, |
| 2941 | isym->st_value, irel->r_addend); |
| 2942 | } |
| 2943 | #endif |
| 2944 | } |
| 2945 | else |
| 2946 | { |
| 2947 | unsigned long indx; |
| 2948 | struct elf_link_hash_entry * h; |
| 2949 | |
| 2950 | /* An external symbol. */ |
| 2951 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2952 | h = elf_sym_hashes (abfd)[indx]; |
| 2953 | BFD_ASSERT (h != NULL); |
| 2954 | |
| 2955 | if ( h->root.type != bfd_link_hash_defined |
| 2956 | && h->root.type != bfd_link_hash_defweak) |
| 2957 | /* This appears to be a reference to an undefined |
| 2958 | symbol. Just ignore it--it will be caught by the |
| 2959 | regular reloc processing. */ |
| 2960 | continue; |
| 2961 | |
| 2962 | symval = (h->root.u.def.value |
| 2963 | + h->root.u.def.section->output_section->vma |
| 2964 | + h->root.u.def.section->output_offset); |
| 2965 | #ifdef DEBUG_RELAX |
| 2966 | fprintf (stderr, |
| 2967 | "relax longjump defined: sec: %s, name: %s, value: %x + %x + %x addend %x\n", |
| 2968 | sec->name, h->root.root.string, h->root.u.def.value, |
| 2969 | sec->output_section->vma, sec->output_offset, irel->r_addend); |
| 2970 | #endif |
| 2971 | } |
| 2972 | |
| 2973 | addend = irel->r_addend; |
| 2974 | |
| 2975 | foff = (symval + addend |
| 2976 | - (irel->r_offset |
| 2977 | + sec->output_section->vma |
| 2978 | + sec->output_offset |
| 2979 | + 4)); |
| 2980 | #ifdef DEBUG_RELAX |
| 2981 | fprintf (stderr, "relax longjump r_offset 0x%x ptr 0x%x symbol 0x%x addend 0x%x distance 0x%x\n", |
| 2982 | irel->r_offset, |
| 2983 | (irel->r_offset |
| 2984 | + sec->output_section->vma |
| 2985 | + sec->output_offset), |
| 2986 | symval, addend, foff); |
| 2987 | #endif |
| 2988 | if (foff < -0x100000 || foff >= 0x100000) |
| 2989 | /* After all that work, we can't shorten this function call. */ |
| 2990 | continue; |
| 2991 | |
| 2992 | /* For simplicity of coding, we are going to modify the section |
| 2993 | contents, the section relocs, and the BFD symbol table. We |
| 2994 | must tell the rest of the code not to free up this |
| 2995 | information. It would be possible to instead create a table |
| 2996 | of changes which have to be made, as is done in coff-mips.c; |
| 2997 | that would be more work, but would require less memory when |
| 2998 | the linker is run. */ |
| 2999 | elf_section_data (sec)->relocs = internal_relocs; |
| 3000 | elf_section_data (sec)->this_hdr.contents = contents; |
| 3001 | symtab_hdr->contents = (bfd_byte *) isymbuf; |
| 3002 | |
| 3003 | if (foff < -0x100 || foff >= 0x100) |
| 3004 | { |
| 3005 | /* Replace the long jump with a jr. */ |
| 3006 | |
| 3007 | irel->r_info = |
| 3008 | ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_22_PCREL); |
| 3009 | |
| 3010 | irel->r_addend = addend; |
| 3011 | addend = 0; |
| 3012 | |
| 3013 | if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info) |
| 3014 | /* If this needs to be changed because of future relaxing, |
| 3015 | it will be handled here like other internal IND12W |
| 3016 | relocs. */ |
| 3017 | bfd_put_32 (abfd, |
| 3018 | 0x00000780 | ((addend << 15) & 0xffff0000) | ((addend >> 17) & 0xf), |
| 3019 | contents + irel->r_offset); |
| 3020 | else |
| 3021 | /* We can't fully resolve this yet, because the external |
| 3022 | symbol value may be changed by future relaxing. |
| 3023 | We let the final link phase handle it. */ |
| 3024 | bfd_put_32 (abfd, 0x00000780, contents + irel->r_offset); |
| 3025 | |
| 3026 | hi_irelfn->r_info = |
| 3027 | ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE); |
| 3028 | lo_irelfn->r_info = |
| 3029 | ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE); |
| 3030 | if (!v850_elf_relax_delete_bytes (abfd, sec, |
| 3031 | irel->r_offset + 4, toaddr, 6)) |
| 3032 | goto error_return; |
| 3033 | |
| 3034 | align_pad_size += 6; |
| 3035 | } |
| 3036 | else |
| 3037 | { |
| 3038 | /* Replace the long jump with a br. */ |
| 3039 | |
| 3040 | irel->r_info = |
| 3041 | ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_V850_9_PCREL); |
| 3042 | |
| 3043 | irel->r_addend = addend; |
| 3044 | addend = 0; |
| 3045 | |
| 3046 | if (ELF32_R_SYM (hi_irelfn->r_info) < symtab_hdr->sh_info) |
| 3047 | /* If this needs to be changed because of future relaxing, |
| 3048 | it will be handled here like other internal IND12W |
| 3049 | relocs. */ |
| 3050 | bfd_put_16 (abfd, |
| 3051 | 0x0585 | ((addend << 10) & 0xf800) | ((addend << 3) & 0x0070), |
| 3052 | contents + irel->r_offset); |
| 3053 | else |
| 3054 | /* We can't fully resolve this yet, because the external |
| 3055 | symbol value may be changed by future relaxing. |
| 3056 | We let the final link phase handle it. */ |
| 3057 | bfd_put_16 (abfd, 0x0585, contents + irel->r_offset); |
| 3058 | |
| 3059 | hi_irelfn->r_info = |
| 3060 | ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_V850_NONE); |
| 3061 | lo_irelfn->r_info = |
| 3062 | ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_V850_NONE); |
| 3063 | if (!v850_elf_relax_delete_bytes (abfd, sec, |
| 3064 | irel->r_offset + 2, toaddr, 8)) |
| 3065 | goto error_return; |
| 3066 | |
| 3067 | align_pad_size += 8; |
| 3068 | } |
| 3069 | } |
| 3070 | } |
| 3071 | |
| 3072 | irelalign = NULL; |
| 3073 | for (irel = internal_relocs; irel < irelend; irel++) |
| 3074 | { |
| 3075 | if (ELF32_R_TYPE (irel->r_info) == (int) R_V850_ALIGN |
| 3076 | && irel->r_offset == toaddr) |
| 3077 | { |
| 3078 | irel->r_offset -= align_pad_size; |
| 3079 | |
| 3080 | if (irelalign == NULL || irelalign->r_addend > irel->r_addend) |
| 3081 | irelalign = irel; |
| 3082 | } |
| 3083 | } |
| 3084 | |
| 3085 | addr = toaddr; |
| 3086 | } |
| 3087 | |
| 3088 | if (!irelalign) |
| 3089 | { |
| 3090 | #ifdef DEBUG_RELAX |
| 3091 | fprintf (stderr, "relax pad %d shorten %d -> %d\n", |
| 3092 | align_pad_size, |
| 3093 | sec->_cooked_size, |
| 3094 | sec->_cooked_size - align_pad_size); |
| 3095 | #endif |
| 3096 | sec->_cooked_size -= align_pad_size; |
| 3097 | } |
| 3098 | |
| 3099 | finish: |
| 3100 | if (internal_relocs != NULL |
| 3101 | && elf_section_data (sec)->relocs != internal_relocs) |
| 3102 | free (internal_relocs); |
| 3103 | |
| 3104 | if (contents != NULL |
| 3105 | && elf_section_data (sec)->this_hdr.contents != (unsigned char *) contents) |
| 3106 | free (contents); |
| 3107 | |
| 3108 | if (isymbuf != NULL |
| 3109 | && symtab_hdr->contents != (bfd_byte *) isymbuf) |
| 3110 | free (isymbuf); |
| 3111 | |
| 3112 | return result; |
| 3113 | |
| 3114 | error_return: |
| 3115 | result = false; |
| 3116 | goto finish; |
| 3117 | } |
| 3118 | \f |
| 3119 | #define TARGET_LITTLE_SYM bfd_elf32_v850_vec |
| 3120 | #define TARGET_LITTLE_NAME "elf32-v850" |
| 3121 | #define ELF_ARCH bfd_arch_v850 |
| 3122 | #define ELF_MACHINE_CODE EM_V850 |
| 3123 | #define ELF_MACHINE_ALT1 EM_CYGNUS_V850 |
| 3124 | #define ELF_MAXPAGESIZE 0x1000 |
| 3125 | |
| 3126 | #define elf_info_to_howto v850_elf_info_to_howto_rela |
| 3127 | #define elf_info_to_howto_rel v850_elf_info_to_howto_rel |
| 3128 | |
| 3129 | #define elf_backend_check_relocs v850_elf_check_relocs |
| 3130 | #define elf_backend_relocate_section v850_elf_relocate_section |
| 3131 | #define elf_backend_object_p v850_elf_object_p |
| 3132 | #define elf_backend_final_write_processing v850_elf_final_write_processing |
| 3133 | #define elf_backend_section_from_bfd_section v850_elf_section_from_bfd_section |
| 3134 | #define elf_backend_symbol_processing v850_elf_symbol_processing |
| 3135 | #define elf_backend_add_symbol_hook v850_elf_add_symbol_hook |
| 3136 | #define elf_backend_link_output_symbol_hook v850_elf_link_output_symbol_hook |
| 3137 | #define elf_backend_section_from_shdr v850_elf_section_from_shdr |
| 3138 | #define elf_backend_fake_sections v850_elf_fake_sections |
| 3139 | #define elf_backend_gc_mark_hook v850_elf_gc_mark_hook |
| 3140 | #define elf_backend_gc_sweep_hook v850_elf_gc_sweep_hook |
| 3141 | |
| 3142 | #define elf_backend_can_gc_sections 1 |
| 3143 | #define elf_backend_rela_normal 1 |
| 3144 | |
| 3145 | #define bfd_elf32_bfd_is_local_label_name v850_elf_is_local_label_name |
| 3146 | #define bfd_elf32_bfd_reloc_type_lookup v850_elf_reloc_type_lookup |
| 3147 | #define bfd_elf32_bfd_merge_private_bfd_data v850_elf_merge_private_bfd_data |
| 3148 | #define bfd_elf32_bfd_set_private_flags v850_elf_set_private_flags |
| 3149 | #define bfd_elf32_bfd_print_private_bfd_data v850_elf_print_private_bfd_data |
| 3150 | #define bfd_elf32_bfd_relax_section v850_elf_relax_section |
| 3151 | |
| 3152 | #define elf_symbol_leading_char '_' |
| 3153 | |
| 3154 | #include "elf32-target.h" |