| 1 | /* Visium-specific support for 32-bit ELF. |
| 2 | |
| 3 | Copyright (C) 2003-2018 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 3 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., 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/visium.h" |
| 28 | #include "libiberty.h" |
| 29 | |
| 30 | static bfd_reloc_status_type visium_elf_howto_parity_reloc |
| 31 | (bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **); |
| 32 | |
| 33 | static reloc_howto_type visium_elf_howto_table[] = { |
| 34 | /* This reloc does nothing. */ |
| 35 | HOWTO (R_VISIUM_NONE, /* type */ |
| 36 | 0, /* rightshift */ |
| 37 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 38 | 0, /* bitsize */ |
| 39 | FALSE, /* pc_relative */ |
| 40 | 0, /* bitpos */ |
| 41 | complain_overflow_dont, /* complain_on_overflow */ |
| 42 | bfd_elf_generic_reloc, /* special_function */ |
| 43 | "R_VISIUM_NONE", /* name */ |
| 44 | FALSE, /* partial_inplace */ |
| 45 | 0, /* src_mask */ |
| 46 | 0, /* dst_mask */ |
| 47 | FALSE), /* pcrel_offset */ |
| 48 | |
| 49 | /* A 8 bit absolute relocation. */ |
| 50 | HOWTO (R_VISIUM_8, /* type */ |
| 51 | 0, /* rightshift */ |
| 52 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 53 | 8, /* bitsize */ |
| 54 | FALSE, /* pc_relative */ |
| 55 | 0, /* bitpos */ |
| 56 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 57 | bfd_elf_generic_reloc, /* special_function */ |
| 58 | "R_VISIUM_8", /* name */ |
| 59 | FALSE, /* partial_inplace */ |
| 60 | 0x00, /* src_mask */ |
| 61 | 0xff, /* dst_mask */ |
| 62 | FALSE), /* pcrel_offset */ |
| 63 | |
| 64 | /* A 16 bit absolute relocation. */ |
| 65 | HOWTO (R_VISIUM_16, /* type */ |
| 66 | 0, /* rightshift */ |
| 67 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 68 | 16, /* bitsize */ |
| 69 | FALSE, /* pc_relative */ |
| 70 | 0, /* bitpos */ |
| 71 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 72 | bfd_elf_generic_reloc, /* special_function */ |
| 73 | "R_VISIUM_16", /* name */ |
| 74 | FALSE, /* partial_inplace */ |
| 75 | 0x0000, /* src_mask */ |
| 76 | 0xffff, /* dst_mask */ |
| 77 | FALSE), /* pcrel_offset */ |
| 78 | |
| 79 | /* A 32 bit absolute relocation. */ |
| 80 | HOWTO (R_VISIUM_32, /* type */ |
| 81 | 0, /* rightshift */ |
| 82 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 83 | 32, /* bitsize */ |
| 84 | FALSE, /* pc_relative */ |
| 85 | 0, /* bitpos */ |
| 86 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 87 | bfd_elf_generic_reloc, /* special_function */ |
| 88 | "R_VISIUM_32", /* name */ |
| 89 | FALSE, /* partial_inplace */ |
| 90 | 0x00000000, /* src_mask */ |
| 91 | 0xffffffff, /* dst_mask */ |
| 92 | FALSE), /* pcrel_offset */ |
| 93 | |
| 94 | |
| 95 | /* A 8 bit PC relative relocation. */ |
| 96 | HOWTO (R_VISIUM_8_PCREL, /* type */ |
| 97 | 0, /* rightshift */ |
| 98 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 99 | 8, /* bitsize */ |
| 100 | TRUE, /* pc_relative */ |
| 101 | 0, /* bitpos */ |
| 102 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 103 | bfd_elf_generic_reloc, /* special_function */ |
| 104 | "R_VISIUM_8_PCREL", /* name */ |
| 105 | FALSE, /* partial_inplace */ |
| 106 | 0x00, /* src_mask */ |
| 107 | 0xff, /* dst_mask */ |
| 108 | TRUE), /* pcrel_offset */ |
| 109 | |
| 110 | /* A 16 bit PC relative relocation. */ |
| 111 | HOWTO (R_VISIUM_16_PCREL, /* type */ |
| 112 | 0, /* rightshift */ |
| 113 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 114 | 16, /* bitsize */ |
| 115 | TRUE, /* pc_relative */ |
| 116 | 0, /* bitpos */ |
| 117 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 118 | bfd_elf_generic_reloc, /* special_function */ |
| 119 | "R_VISIUM_16_PCREL", /* name */ |
| 120 | FALSE, /* partial inplace */ |
| 121 | 0x0000, /* src_mask */ |
| 122 | 0xffff, /* dst_mask */ |
| 123 | TRUE), /* pcrel_offset */ |
| 124 | |
| 125 | /* A 32-bit PC relative relocation. */ |
| 126 | HOWTO (R_VISIUM_32_PCREL, /* type */ |
| 127 | 0, /* rightshift */ |
| 128 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 129 | 32, /* bitsize */ |
| 130 | TRUE, /* pc_relative */ |
| 131 | 0, /* bitpos */ |
| 132 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 133 | bfd_elf_generic_reloc, /* special_function */ |
| 134 | "R_VISIUM_32_PCREL", /* name */ |
| 135 | FALSE, /* partial_inplace */ |
| 136 | 0, /* src_mask */ |
| 137 | 0xffffffff, /* dst_mask */ |
| 138 | TRUE), /* pcrel_offset */ |
| 139 | |
| 140 | /* A 16-bit PC word relative offset, relative to start of instruction |
| 141 | and always in the second half of the instruction. */ |
| 142 | HOWTO (R_VISIUM_PC16, /* type */ |
| 143 | 2, /* rightshift */ |
| 144 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 145 | 16, /* bitsize */ |
| 146 | TRUE, /* pc_relative */ |
| 147 | 0, /* bitpos */ |
| 148 | complain_overflow_signed, /* complain_on_overflow */ |
| 149 | visium_elf_howto_parity_reloc, /* special_function */ |
| 150 | "R_VISIUM_PC16", /* name */ |
| 151 | FALSE, /* partial_inplace */ |
| 152 | 0x00000000, /* src_mask */ |
| 153 | 0x0000ffff, /* dst_mask */ |
| 154 | TRUE), /* pcrel_offset */ |
| 155 | |
| 156 | /* The high 16 bits of symbol value. */ |
| 157 | HOWTO (R_VISIUM_HI16, /* type */ |
| 158 | 16, /* rightshift */ |
| 159 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 160 | 16, /* bitsize */ |
| 161 | FALSE, /* pc_relative */ |
| 162 | 0, /* bitpos */ |
| 163 | complain_overflow_dont, /* complain_on_overflow */ |
| 164 | visium_elf_howto_parity_reloc, /* special_function */ |
| 165 | "R_VISIUM_HI16", /* name */ |
| 166 | FALSE, /* partial_inplace */ |
| 167 | 0x00000000, /* src_mask */ |
| 168 | 0x0000ffff, /* dst_mask */ |
| 169 | FALSE), /* pcrel_offset */ |
| 170 | |
| 171 | /* The low 16 bits of symbol value. */ |
| 172 | HOWTO (R_VISIUM_LO16, /* type */ |
| 173 | 0, /* rightshift */ |
| 174 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 175 | 16, /* bitsize */ |
| 176 | FALSE, /* pc_relative */ |
| 177 | 0, /* bitpos */ |
| 178 | complain_overflow_dont, /* complain_on_overflow */ |
| 179 | visium_elf_howto_parity_reloc, /* special_function */ |
| 180 | "R_VISIUM_LO16", /* name */ |
| 181 | FALSE, /* partial_inplace */ |
| 182 | 0x00000000, /* src_mask */ |
| 183 | 0x0000ffff, /* dst_mask */ |
| 184 | FALSE), /* pcrel_offset */ |
| 185 | |
| 186 | /* A 16 bit immediate value. */ |
| 187 | HOWTO (R_VISIUM_IM16, /* type */ |
| 188 | 0, /* rightshift */ |
| 189 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 190 | 16, /* bitsize */ |
| 191 | FALSE, /* pc_relative */ |
| 192 | 0, /* bitpos */ |
| 193 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 194 | visium_elf_howto_parity_reloc, /* special_function */ |
| 195 | "R_VISIUM_IM16", /* name */ |
| 196 | FALSE, /* partial_inplace */ |
| 197 | 0x0000000, /* src_mask */ |
| 198 | 0x000ffff, /* dst_mask */ |
| 199 | FALSE), /* pcrel_offset */ |
| 200 | |
| 201 | /* The high 16 bits of symbol value, pc relative. */ |
| 202 | HOWTO (R_VISIUM_HI16_PCREL, /* type */ |
| 203 | 16, /* rightshift */ |
| 204 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 205 | 16, /* bitsize */ |
| 206 | TRUE, /* pc_relative */ |
| 207 | 0, /* bitpos */ |
| 208 | complain_overflow_dont, /* complain_on_overflow */ |
| 209 | visium_elf_howto_parity_reloc, /* special_function */ |
| 210 | "R_VISIUM_HI16_PCREL", /* name */ |
| 211 | FALSE, /* partial_inplace */ |
| 212 | 0x00000000, /* src_mask */ |
| 213 | 0x0000ffff, /* dst_mask */ |
| 214 | TRUE), /* pcrel_offset */ |
| 215 | |
| 216 | /* The low 16 bits of symbol value, pc relative. */ |
| 217 | HOWTO (R_VISIUM_LO16_PCREL, /* type */ |
| 218 | 0, /* rightshift */ |
| 219 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 220 | 16, /* bitsize */ |
| 221 | TRUE, /* pc_relative */ |
| 222 | 0, /* bitpos */ |
| 223 | complain_overflow_dont, /* complain_on_overflow */ |
| 224 | visium_elf_howto_parity_reloc, /* special_function */ |
| 225 | "R_VISIUM_LO16_PCREL", /* name */ |
| 226 | FALSE, /* partial_inplace */ |
| 227 | 0x00000000, /* src_mask */ |
| 228 | 0x0000ffff, /* dst_mask */ |
| 229 | TRUE), /* pcrel_offset */ |
| 230 | |
| 231 | /* A 16 bit immediate value, pc relative. */ |
| 232 | HOWTO (R_VISIUM_IM16_PCREL, /* type */ |
| 233 | 0, /* rightshift */ |
| 234 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 235 | 16, /* bitsize */ |
| 236 | TRUE, /* pc_relative */ |
| 237 | 0, /* bitpos */ |
| 238 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 239 | visium_elf_howto_parity_reloc, /* special_function */ |
| 240 | "R_VISIUM_IM16_PCREL", /* name */ |
| 241 | FALSE, /* partial_inplace */ |
| 242 | 0x0000000, /* src_mask */ |
| 243 | 0x000ffff, /* dst_mask */ |
| 244 | TRUE), /* pcrel_offset */ |
| 245 | |
| 246 | }; |
| 247 | |
| 248 | /* GNU extension to record C++ vtable hierarchy. */ |
| 249 | static reloc_howto_type visium_elf_vtinherit_howto = |
| 250 | HOWTO (R_VISIUM_GNU_VTINHERIT, /* type */ |
| 251 | 0, /* rightshift */ |
| 252 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 253 | 0, /* bitsize */ |
| 254 | FALSE, /* pc_relative */ |
| 255 | 0, /* bitpos */ |
| 256 | complain_overflow_dont, /* complain_on_overflow */ |
| 257 | NULL, /* special_function */ |
| 258 | "R_VISIUM_GNU_VTINHERIT", /* name */ |
| 259 | FALSE, /* partial_inplace */ |
| 260 | 0, /* src_mask */ |
| 261 | 0, /* dst_mask */ |
| 262 | FALSE); /* pcrel_offset */ |
| 263 | |
| 264 | /* GNU extension to record C++ vtable member usage. */ |
| 265 | static reloc_howto_type visium_elf_vtentry_howto = |
| 266 | HOWTO (R_VISIUM_GNU_VTENTRY, /* type */ |
| 267 | 0, /* rightshift */ |
| 268 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 269 | 0, /* bitsize */ |
| 270 | FALSE, /* pc_relative */ |
| 271 | 0, /* bitpos */ |
| 272 | complain_overflow_dont, /* complain_on_overflow */ |
| 273 | NULL, /* special_function */ |
| 274 | "R_VISIUM_GNU_VTENTRY", /* name */ |
| 275 | FALSE, /* partial_inplace */ |
| 276 | 0, /* src_mask */ |
| 277 | 0, /* dst_mask */ |
| 278 | FALSE); /* pcrel_offset */ |
| 279 | |
| 280 | /* Return the parity bit for INSN shifted to its final position. */ |
| 281 | |
| 282 | static bfd_vma |
| 283 | visium_parity_bit (bfd_vma insn) |
| 284 | { |
| 285 | bfd_vma p = 0; |
| 286 | int i; |
| 287 | |
| 288 | for (i = 0; i < 31; i++) |
| 289 | { |
| 290 | p ^= (insn & 1); |
| 291 | insn >>= 1; |
| 292 | } |
| 293 | |
| 294 | return p << 31; |
| 295 | } |
| 296 | |
| 297 | /* This "special function" will only be used when the input and |
| 298 | output files have different formats ie. when generating S-records |
| 299 | directly using "--oformat srec". Otherwise we use |
| 300 | _bfd_final_link_relocate which uses a howto structure, but does |
| 301 | not use the special_function field. |
| 302 | |
| 303 | It sets instruction parity to even. This cannot be done by a howto. */ |
| 304 | |
| 305 | static bfd_reloc_status_type |
| 306 | visium_elf_howto_parity_reloc (bfd * input_bfd, arelent *reloc_entry, |
| 307 | asymbol *symbol, PTR data, |
| 308 | asection *input_section, bfd *output_bfd, |
| 309 | char **error_message ATTRIBUTE_UNUSED) |
| 310 | { |
| 311 | bfd_reloc_status_type ret; |
| 312 | bfd_vma relocation; |
| 313 | bfd_byte *inplace_address; |
| 314 | bfd_vma insn; |
| 315 | const bfd_vma signmask = 0xffff8000; |
| 316 | |
| 317 | /* This part is from bfd_elf_generic_reloc. |
| 318 | If we're relocating, and this an external symbol, we don't want |
| 319 | to change anything. */ |
| 320 | if (output_bfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0) |
| 321 | { |
| 322 | reloc_entry->address += input_section->output_offset; |
| 323 | return bfd_reloc_ok; |
| 324 | } |
| 325 | |
| 326 | /* Now do the reloc in the usual way. */ |
| 327 | |
| 328 | /* Sanity check the address (offset in section). */ |
| 329 | if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section)) |
| 330 | return bfd_reloc_outofrange; |
| 331 | |
| 332 | ret = bfd_reloc_ok; |
| 333 | if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) |
| 334 | ret = bfd_reloc_undefined; |
| 335 | |
| 336 | if (bfd_is_com_section (symbol->section) || output_bfd != (bfd *) NULL) |
| 337 | relocation = 0; |
| 338 | else |
| 339 | relocation = symbol->value; |
| 340 | |
| 341 | /* Only do this for a final link. */ |
| 342 | if (output_bfd == (bfd *) NULL) |
| 343 | { |
| 344 | relocation += symbol->section->output_section->vma; |
| 345 | relocation += symbol->section->output_offset; |
| 346 | } |
| 347 | |
| 348 | relocation += reloc_entry->addend; |
| 349 | inplace_address = (bfd_byte *) data + reloc_entry->address; |
| 350 | insn = bfd_get_32 (input_bfd, inplace_address); |
| 351 | |
| 352 | if (reloc_entry->howto->pc_relative) |
| 353 | { |
| 354 | relocation -= input_section->output_section->vma |
| 355 | + input_section->output_offset; |
| 356 | relocation -= reloc_entry->address; |
| 357 | } |
| 358 | |
| 359 | switch (reloc_entry->howto->type) |
| 360 | { |
| 361 | case R_VISIUM_PC16: |
| 362 | relocation >>= 2; |
| 363 | if (ret == bfd_reloc_ok && (relocation & signmask) != 0 |
| 364 | && (relocation & signmask) != signmask) |
| 365 | ret = bfd_reloc_overflow; |
| 366 | relocation &= 0xffff; |
| 367 | break; |
| 368 | case R_VISIUM_HI16: |
| 369 | case R_VISIUM_HI16_PCREL: |
| 370 | relocation = (relocation >> 16) & 0xffff; |
| 371 | break; |
| 372 | case R_VISIUM_LO16: |
| 373 | case R_VISIUM_LO16_PCREL: |
| 374 | relocation &= 0xffff; |
| 375 | break; |
| 376 | case R_VISIUM_IM16: |
| 377 | case R_VISIUM_IM16_PCREL: |
| 378 | if (ret == bfd_reloc_ok && (relocation & 0xffff0000) != 0) |
| 379 | ret = bfd_reloc_overflow; |
| 380 | relocation &= 0xffff; |
| 381 | break; |
| 382 | } |
| 383 | insn = (insn & 0x7fff0000) | relocation; |
| 384 | insn |= visium_parity_bit (insn); |
| 385 | bfd_put_32 (input_bfd, insn, inplace_address); |
| 386 | |
| 387 | if (output_bfd != (bfd *) NULL) |
| 388 | reloc_entry->address += input_section->output_offset; |
| 389 | |
| 390 | return ret; |
| 391 | } |
| 392 | |
| 393 | static reloc_howto_type * |
| 394 | visium_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 395 | bfd_reloc_code_real_type code) |
| 396 | { |
| 397 | /* Note that the visium_elf_howto_table is indexed by the R_ |
| 398 | constants. Thus, the order that the howto records appear in the |
| 399 | table *must* match the order of the relocation types defined in |
| 400 | include/elf/visium.h. */ |
| 401 | switch (code) |
| 402 | { |
| 403 | case BFD_RELOC_NONE: |
| 404 | return &visium_elf_howto_table[(int) R_VISIUM_NONE]; |
| 405 | case BFD_RELOC_8: |
| 406 | return &visium_elf_howto_table[(int) R_VISIUM_8]; |
| 407 | case BFD_RELOC_16: |
| 408 | return &visium_elf_howto_table[(int) R_VISIUM_16]; |
| 409 | case BFD_RELOC_32: |
| 410 | return &visium_elf_howto_table[(int) R_VISIUM_32]; |
| 411 | case BFD_RELOC_8_PCREL: |
| 412 | return &visium_elf_howto_table[(int) R_VISIUM_8_PCREL]; |
| 413 | case BFD_RELOC_16_PCREL: |
| 414 | return &visium_elf_howto_table[(int) R_VISIUM_16_PCREL]; |
| 415 | case BFD_RELOC_32_PCREL: |
| 416 | return &visium_elf_howto_table[(int) R_VISIUM_32_PCREL]; |
| 417 | case BFD_RELOC_VISIUM_REL16: |
| 418 | return &visium_elf_howto_table[(int) R_VISIUM_PC16]; |
| 419 | case BFD_RELOC_VISIUM_HI16: |
| 420 | return &visium_elf_howto_table[(int) R_VISIUM_HI16]; |
| 421 | case BFD_RELOC_VISIUM_LO16: |
| 422 | return &visium_elf_howto_table[(int) R_VISIUM_LO16]; |
| 423 | case BFD_RELOC_VISIUM_IM16: |
| 424 | return &visium_elf_howto_table[(int) R_VISIUM_IM16]; |
| 425 | case BFD_RELOC_VISIUM_HI16_PCREL: |
| 426 | return &visium_elf_howto_table[(int) R_VISIUM_HI16_PCREL]; |
| 427 | case BFD_RELOC_VISIUM_LO16_PCREL: |
| 428 | return &visium_elf_howto_table[(int) R_VISIUM_LO16_PCREL]; |
| 429 | case BFD_RELOC_VISIUM_IM16_PCREL: |
| 430 | return &visium_elf_howto_table[(int) R_VISIUM_IM16_PCREL]; |
| 431 | case BFD_RELOC_VTABLE_INHERIT: |
| 432 | return &visium_elf_vtinherit_howto; |
| 433 | case BFD_RELOC_VTABLE_ENTRY: |
| 434 | return &visium_elf_vtentry_howto; |
| 435 | default: |
| 436 | return NULL; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | static reloc_howto_type * |
| 441 | visium_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| 442 | { |
| 443 | unsigned int i; |
| 444 | |
| 445 | for (i = 0; |
| 446 | i < (sizeof (visium_elf_howto_table) |
| 447 | / sizeof (visium_elf_howto_table[0])); i++) |
| 448 | if (visium_elf_howto_table[i].name != NULL |
| 449 | && strcasecmp (visium_elf_howto_table[i].name, r_name) == 0) |
| 450 | return &visium_elf_howto_table[i]; |
| 451 | |
| 452 | if (strcasecmp (visium_elf_vtinherit_howto.name, r_name) == 0) |
| 453 | return &visium_elf_vtinherit_howto; |
| 454 | if (strcasecmp (visium_elf_vtentry_howto.name, r_name) == 0) |
| 455 | return &visium_elf_vtentry_howto; |
| 456 | |
| 457 | return NULL; |
| 458 | } |
| 459 | |
| 460 | /* Set the howto pointer for a VISIUM ELF reloc. */ |
| 461 | |
| 462 | static bfd_boolean |
| 463 | visium_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, |
| 464 | Elf_Internal_Rela *dst) |
| 465 | { |
| 466 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
| 467 | |
| 468 | switch (r_type) |
| 469 | { |
| 470 | case R_VISIUM_GNU_VTINHERIT: |
| 471 | cache_ptr->howto = &visium_elf_vtinherit_howto; |
| 472 | break; |
| 473 | |
| 474 | case R_VISIUM_GNU_VTENTRY: |
| 475 | cache_ptr->howto = &visium_elf_vtentry_howto; |
| 476 | break; |
| 477 | |
| 478 | default: |
| 479 | if (r_type >= ARRAY_SIZE (visium_elf_howto_table)) |
| 480 | { |
| 481 | /* xgettext:c-format */ |
| 482 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 483 | abfd, r_type); |
| 484 | bfd_set_error (bfd_error_bad_value); |
| 485 | return FALSE; |
| 486 | } |
| 487 | cache_ptr->howto = &visium_elf_howto_table[r_type]; |
| 488 | break; |
| 489 | } |
| 490 | return TRUE; |
| 491 | } |
| 492 | |
| 493 | /* Look through the relocs for a section during the first phase. |
| 494 | Since we don't do .gots or .plts, we just need to consider the |
| 495 | virtual table relocs for gc. */ |
| 496 | |
| 497 | static bfd_boolean |
| 498 | visium_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 499 | asection *sec, const Elf_Internal_Rela *relocs) |
| 500 | { |
| 501 | Elf_Internal_Shdr *symtab_hdr; |
| 502 | struct elf_link_hash_entry **sym_hashes; |
| 503 | const Elf_Internal_Rela *rel; |
| 504 | const Elf_Internal_Rela *rel_end; |
| 505 | |
| 506 | if (bfd_link_relocatable (info)) |
| 507 | return TRUE; |
| 508 | |
| 509 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 510 | sym_hashes = elf_sym_hashes (abfd); |
| 511 | |
| 512 | rel_end = relocs + sec->reloc_count; |
| 513 | for (rel = relocs; rel < rel_end; rel++) |
| 514 | { |
| 515 | struct elf_link_hash_entry *h; |
| 516 | unsigned long r_symndx; |
| 517 | |
| 518 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 519 | if (r_symndx < symtab_hdr->sh_info) |
| 520 | h = NULL; |
| 521 | else |
| 522 | { |
| 523 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 524 | while (h->root.type == bfd_link_hash_indirect |
| 525 | || h->root.type == bfd_link_hash_warning) |
| 526 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 527 | } |
| 528 | |
| 529 | switch (ELF32_R_TYPE (rel->r_info)) |
| 530 | { |
| 531 | /* This relocation describes the C++ object vtable hierarchy. |
| 532 | Reconstruct it for later use during GC. */ |
| 533 | case R_VISIUM_GNU_VTINHERIT: |
| 534 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 535 | return FALSE; |
| 536 | break; |
| 537 | |
| 538 | /* This relocation describes which C++ vtable entries are actually |
| 539 | used. Record for later use during GC. */ |
| 540 | case R_VISIUM_GNU_VTENTRY: |
| 541 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 542 | return FALSE; |
| 543 | break; |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | return TRUE; |
| 548 | } |
| 549 | |
| 550 | /* Relocate a VISIUM ELF section. */ |
| 551 | |
| 552 | static bfd_boolean |
| 553 | visium_elf_relocate_section (bfd *output_bfd, |
| 554 | struct bfd_link_info *info, bfd *input_bfd, |
| 555 | asection *input_section, bfd_byte *contents, |
| 556 | Elf_Internal_Rela *relocs, |
| 557 | Elf_Internal_Sym *local_syms, |
| 558 | asection **local_sections) |
| 559 | { |
| 560 | Elf_Internal_Shdr *symtab_hdr; |
| 561 | struct elf_link_hash_entry **sym_hashes; |
| 562 | Elf_Internal_Rela *rel; |
| 563 | Elf_Internal_Rela *relend; |
| 564 | |
| 565 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 566 | sym_hashes = elf_sym_hashes (input_bfd); |
| 567 | relend = relocs + input_section->reloc_count; |
| 568 | |
| 569 | for (rel = relocs; rel < relend; rel++) |
| 570 | { |
| 571 | reloc_howto_type *howto; |
| 572 | unsigned long r_symndx; |
| 573 | Elf_Internal_Sym *sym; |
| 574 | asection *sec; |
| 575 | struct elf_link_hash_entry *h; |
| 576 | bfd_vma relocation; |
| 577 | bfd_reloc_status_type r; |
| 578 | const char *name = NULL; |
| 579 | int r_type; |
| 580 | bfd_vma insn; |
| 581 | |
| 582 | r_type = ELF32_R_TYPE (rel->r_info); |
| 583 | |
| 584 | if (r_type == R_VISIUM_GNU_VTINHERIT || r_type == R_VISIUM_GNU_VTENTRY) |
| 585 | continue; |
| 586 | |
| 587 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 588 | |
| 589 | howto = visium_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
| 590 | h = NULL; |
| 591 | sym = NULL; |
| 592 | sec = NULL; |
| 593 | |
| 594 | if (r_symndx < symtab_hdr->sh_info) |
| 595 | { |
| 596 | /* This is a local symbol. */ |
| 597 | sym = local_syms + r_symndx; |
| 598 | sec = local_sections[r_symndx]; |
| 599 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 600 | |
| 601 | name = bfd_elf_string_from_elf_section |
| 602 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 603 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 604 | } |
| 605 | else |
| 606 | { |
| 607 | bfd_boolean unresolved_reloc; |
| 608 | bfd_boolean warned, ignored; |
| 609 | |
| 610 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 611 | r_symndx, symtab_hdr, sym_hashes, |
| 612 | h, sec, relocation, |
| 613 | unresolved_reloc, warned, ignored); |
| 614 | |
| 615 | name = h->root.root.string; |
| 616 | } |
| 617 | |
| 618 | if (sec != NULL && discarded_section (sec)) |
| 619 | { |
| 620 | /* For relocs against symbols from removed linkonce sections, |
| 621 | or sections discarded by a linker script, we just want the |
| 622 | section contents zeroed. Avoid any special processing. */ |
| 623 | _bfd_clear_contents (howto, input_bfd, input_section, |
| 624 | contents + rel->r_offset); |
| 625 | |
| 626 | rel->r_info = 0; |
| 627 | rel->r_addend = 0; |
| 628 | continue; |
| 629 | } |
| 630 | |
| 631 | if (bfd_link_relocatable (info)) |
| 632 | continue; |
| 633 | |
| 634 | switch (r_type) |
| 635 | { |
| 636 | case R_VISIUM_PC16: |
| 637 | case R_VISIUM_HI16: |
| 638 | case R_VISIUM_LO16: |
| 639 | case R_VISIUM_IM16: |
| 640 | case R_VISIUM_HI16_PCREL: |
| 641 | case R_VISIUM_LO16_PCREL: |
| 642 | case R_VISIUM_IM16_PCREL: |
| 643 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 644 | contents, rel->r_offset, |
| 645 | relocation, rel->r_addend); |
| 646 | |
| 647 | /* For instruction relocations, the parity needs correcting. */ |
| 648 | if (r == bfd_reloc_ok) |
| 649 | { |
| 650 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 651 | insn = (insn & 0x7fffffff) | visium_parity_bit (insn); |
| 652 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 653 | } |
| 654 | break; |
| 655 | |
| 656 | default: |
| 657 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 658 | contents, rel->r_offset, |
| 659 | relocation, rel->r_addend); |
| 660 | break; |
| 661 | } |
| 662 | |
| 663 | if (r != bfd_reloc_ok) |
| 664 | { |
| 665 | const char *msg = (const char *) NULL; |
| 666 | |
| 667 | switch (r) |
| 668 | { |
| 669 | case bfd_reloc_overflow: |
| 670 | (*info->callbacks->reloc_overflow) |
| 671 | (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, |
| 672 | input_bfd, input_section, rel->r_offset); |
| 673 | break; |
| 674 | |
| 675 | case bfd_reloc_undefined: |
| 676 | (*info->callbacks->undefined_symbol) |
| 677 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 678 | break; |
| 679 | |
| 680 | case bfd_reloc_outofrange: |
| 681 | msg = _("internal error: out of range error"); |
| 682 | break; |
| 683 | |
| 684 | case bfd_reloc_notsupported: |
| 685 | msg = _("internal error: unsupported relocation error"); |
| 686 | break; |
| 687 | |
| 688 | case bfd_reloc_dangerous: |
| 689 | msg = _("internal error: dangerous relocation"); |
| 690 | break; |
| 691 | |
| 692 | default: |
| 693 | msg = _("internal error: unknown error"); |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | if (msg) |
| 698 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
| 699 | input_section, rel->r_offset); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | return TRUE; |
| 704 | } |
| 705 | |
| 706 | /* This function is called during section gc to discover the section a |
| 707 | to which a particular relocation refers. Return the section that |
| 708 | should be marked against GC for a given relocation. */ |
| 709 | |
| 710 | static asection * |
| 711 | visium_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, |
| 712 | Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, |
| 713 | Elf_Internal_Sym *sym) |
| 714 | { |
| 715 | if (h != NULL) |
| 716 | switch (ELF32_R_TYPE (rel->r_info)) |
| 717 | { |
| 718 | case R_VISIUM_GNU_VTINHERIT: |
| 719 | case R_VISIUM_GNU_VTENTRY: |
| 720 | return NULL; |
| 721 | } |
| 722 | |
| 723 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 724 | } |
| 725 | |
| 726 | static void |
| 727 | visium_elf_post_process_headers (bfd *abfd, |
| 728 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 729 | { |
| 730 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); |
| 731 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_STANDALONE; |
| 732 | i_ehdrp->e_ident[EI_ABIVERSION] = 1; |
| 733 | } |
| 734 | |
| 735 | /* Function to set the ELF flag bits. */ |
| 736 | |
| 737 | static bfd_boolean |
| 738 | visium_elf_set_private_flags (bfd *abfd, flagword flags) |
| 739 | { |
| 740 | elf_elfheader (abfd)->e_flags = flags; |
| 741 | elf_flags_init (abfd) = TRUE; |
| 742 | return TRUE; |
| 743 | } |
| 744 | |
| 745 | /* Copy backend specific data from one object module to another. */ |
| 746 | |
| 747 | static bfd_boolean |
| 748 | visium_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 749 | { |
| 750 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 751 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 752 | return TRUE; |
| 753 | |
| 754 | BFD_ASSERT (!elf_flags_init (obfd) |
| 755 | || elf_elfheader (obfd)->e_flags == |
| 756 | elf_elfheader (ibfd)->e_flags); |
| 757 | |
| 758 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 759 | elf_flags_init (obfd) = TRUE; |
| 760 | |
| 761 | /* Copy object attributes. */ |
| 762 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 763 | |
| 764 | return TRUE; |
| 765 | } |
| 766 | |
| 767 | /* Merge backend specific data from an object |
| 768 | file to the output object file when linking. */ |
| 769 | |
| 770 | static bfd_boolean |
| 771 | visium_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 772 | { |
| 773 | bfd *obfd = info->output_bfd; |
| 774 | flagword old_flags; |
| 775 | flagword new_flags; |
| 776 | flagword mismatch; |
| 777 | const char *opt_arch = NULL; |
| 778 | const char *new_opt_with = NULL; |
| 779 | const char *old_opt_with = NULL; |
| 780 | const char *with = "with"; |
| 781 | const char *without = "without"; |
| 782 | const char *mcm = "mcm"; |
| 783 | const char *mcm24 = "mcm24"; |
| 784 | const char *gr6 = "gr6"; |
| 785 | |
| 786 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 787 | old_flags = elf_elfheader (obfd)->e_flags; |
| 788 | |
| 789 | if (!elf_flags_init (obfd)) |
| 790 | { |
| 791 | /* First call, no flags set. */ |
| 792 | elf_flags_init (obfd) = TRUE; |
| 793 | elf_elfheader (obfd)->e_flags = new_flags; |
| 794 | } |
| 795 | else |
| 796 | { |
| 797 | mismatch = (new_flags ^ old_flags) |
| 798 | & (EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_MCM24 | EF_VISIUM_ARCH_GR6); |
| 799 | if (mismatch & EF_VISIUM_ARCH_GR6) |
| 800 | { |
| 801 | opt_arch = gr6; |
| 802 | new_opt_with = new_flags & EF_VISIUM_ARCH_GR6 ? with : without; |
| 803 | old_opt_with = old_flags & EF_VISIUM_ARCH_GR6 ? with : without; |
| 804 | } |
| 805 | else if (mismatch & EF_VISIUM_ARCH_MCM) |
| 806 | { |
| 807 | opt_arch = mcm; |
| 808 | new_opt_with = new_flags & EF_VISIUM_ARCH_MCM ? with : without; |
| 809 | old_opt_with = old_flags & EF_VISIUM_ARCH_MCM ? with : without; |
| 810 | } |
| 811 | else if (mismatch & EF_VISIUM_ARCH_MCM24) |
| 812 | { |
| 813 | opt_arch = mcm24; |
| 814 | new_opt_with = new_flags & EF_VISIUM_ARCH_MCM24 ? with : without; |
| 815 | old_opt_with = old_flags & EF_VISIUM_ARCH_MCM24 ? with : without; |
| 816 | } |
| 817 | |
| 818 | if (mismatch) |
| 819 | _bfd_error_handler |
| 820 | /* xgettext:c-format */ |
| 821 | (_("%pB: compiled %s -mtune=%s and linked with modules" |
| 822 | " compiled %s -mtune=%s"), |
| 823 | ibfd, new_opt_with, opt_arch, old_opt_with, opt_arch); |
| 824 | } |
| 825 | |
| 826 | return TRUE; |
| 827 | } |
| 828 | |
| 829 | static bfd_boolean |
| 830 | visium_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
| 831 | { |
| 832 | FILE *file = (FILE *) ptr; |
| 833 | flagword flags; |
| 834 | |
| 835 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 836 | |
| 837 | /* Print normal ELF private data. */ |
| 838 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 839 | |
| 840 | flags = elf_elfheader (abfd)->e_flags; |
| 841 | fprintf (file, _("private flags = 0x%lx:"), (long) flags); |
| 842 | |
| 843 | if (flags & EF_VISIUM_ARCH_GR6) |
| 844 | fprintf (file, " -mtune=gr6"); |
| 845 | else if (flags & EF_VISIUM_ARCH_MCM) |
| 846 | fprintf (file, " -mtune=mcm"); |
| 847 | else if (flags & EF_VISIUM_ARCH_MCM24) |
| 848 | fprintf (file, " -mtune=mcm24"); |
| 849 | |
| 850 | fputc ('\n', file); |
| 851 | return TRUE; |
| 852 | } |
| 853 | |
| 854 | #define ELF_ARCH bfd_arch_visium |
| 855 | #define ELF_MACHINE_CODE EM_VISIUM |
| 856 | #define ELF_MAXPAGESIZE 1 |
| 857 | |
| 858 | #define TARGET_BIG_SYM visium_elf32_vec |
| 859 | #define TARGET_BIG_NAME "elf32-visium" |
| 860 | |
| 861 | #define elf_info_to_howto_rel NULL |
| 862 | #define elf_info_to_howto visium_info_to_howto_rela |
| 863 | #define elf_backend_relocate_section visium_elf_relocate_section |
| 864 | #define elf_backend_gc_mark_hook visium_elf_gc_mark_hook |
| 865 | #define elf_backend_check_relocs visium_elf_check_relocs |
| 866 | #define elf_backend_rela_normal 1 |
| 867 | |
| 868 | #define elf_backend_can_gc_sections 1 |
| 869 | |
| 870 | #define bfd_elf32_bfd_reloc_type_lookup visium_reloc_type_lookup |
| 871 | #define bfd_elf32_bfd_reloc_name_lookup visium_reloc_name_lookup |
| 872 | |
| 873 | #define bfd_elf32_bfd_set_private_flags visium_elf_set_private_flags |
| 874 | #define bfd_elf32_bfd_copy_private_bfd_data visium_elf_copy_private_bfd_data |
| 875 | #define bfd_elf32_bfd_merge_private_bfd_data visium_elf_merge_private_bfd_data |
| 876 | #define bfd_elf32_bfd_print_private_bfd_data visium_elf_print_private_bfd_data |
| 877 | #define elf_backend_post_process_headers visium_elf_post_process_headers |
| 878 | |
| 879 | #include "elf32-target.h" |