| 1 | /* Linux bpf specific support for 64-bit ELF |
| 2 | Copyright (C) 2019 Free Software Foundation, Inc. |
| 3 | Contributed by Oracle 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, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/bpf.h" |
| 27 | #include "libiberty.h" |
| 28 | |
| 29 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 30 | #define MINUS_ONE (~ (bfd_vma) 0) |
| 31 | |
| 32 | #define BASEADDR(SEC) ((SEC)->output_section->vma + (SEC)->output_offset) |
| 33 | |
| 34 | /* Relocation tables. */ |
| 35 | static reloc_howto_type bpf_elf_howto_table [] = |
| 36 | { |
| 37 | /* This reloc does nothing. */ |
| 38 | HOWTO (R_BPF_NONE, /* type */ |
| 39 | 0, /* rightshift */ |
| 40 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 41 | 0, /* bitsize */ |
| 42 | FALSE, /* pc_relative */ |
| 43 | 0, /* bitpos */ |
| 44 | complain_overflow_dont, /* complain_on_overflow */ |
| 45 | bfd_elf_generic_reloc, /* special_function */ |
| 46 | "R_BPF_NONE", /* name */ |
| 47 | FALSE, /* partial_inplace */ |
| 48 | 0, /* src_mask */ |
| 49 | 0, /* dst_mask */ |
| 50 | FALSE), /* pcrel_offset */ |
| 51 | |
| 52 | /* 64-immediate in LDDW instruction. */ |
| 53 | HOWTO (R_BPF_INSN_64, /* type */ |
| 54 | 0, /* rightshift */ |
| 55 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 56 | 64, /* bitsize */ |
| 57 | FALSE, /* pc_relative */ |
| 58 | 0, /* bitpos */ |
| 59 | complain_overflow_signed, /* complain_on_overflow */ |
| 60 | bfd_elf_generic_reloc, /* special_function */ |
| 61 | "R_BPF_INSN_64", /* name */ |
| 62 | FALSE, /* partial_inplace */ |
| 63 | 0, /* src_mask */ |
| 64 | MINUS_ONE, /* dst_mask */ |
| 65 | TRUE), /* pcrel_offset */ |
| 66 | |
| 67 | /* 32-immediate in LDDW instruction. */ |
| 68 | HOWTO (R_BPF_INSN_32, /* type */ |
| 69 | 0, /* rightshift */ |
| 70 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 71 | 32, /* bitsize */ |
| 72 | FALSE, /* pc_relative */ |
| 73 | 0, /* bitpos */ |
| 74 | complain_overflow_signed, /* complain_on_overflow */ |
| 75 | bfd_elf_generic_reloc, /* special_function */ |
| 76 | "R_BPF_INSN_32", /* name */ |
| 77 | FALSE, /* partial_inplace */ |
| 78 | 0, /* src_mask */ |
| 79 | 0xffffffff, /* dst_mask */ |
| 80 | TRUE), /* pcrel_offset */ |
| 81 | |
| 82 | /* 16-bit offsets in instructions. */ |
| 83 | HOWTO (R_BPF_INSN_16, /* type */ |
| 84 | 0, /* rightshift */ |
| 85 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 86 | 16, /* bitsize */ |
| 87 | FALSE, /* pc_relative */ |
| 88 | 0, /* bitpos */ |
| 89 | complain_overflow_signed, /* complain_on_overflow */ |
| 90 | bfd_elf_generic_reloc, /* special_function */ |
| 91 | "R_BPF_INSN_16", /* name */ |
| 92 | FALSE, /* partial_inplace */ |
| 93 | 0, /* src_mask */ |
| 94 | 0x0000ffff, /* dst_mask */ |
| 95 | TRUE), /* pcrel_offset */ |
| 96 | |
| 97 | /* 16-bit PC-relative address in jump instructions. */ |
| 98 | HOWTO (R_BPF_INSN_DISP16, /* type */ |
| 99 | 0, /* rightshift */ |
| 100 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 101 | 16, /* bitsize */ |
| 102 | TRUE, /* pc_relative */ |
| 103 | 32, /* bitpos */ |
| 104 | complain_overflow_signed, /* complain_on_overflow */ |
| 105 | bfd_elf_generic_reloc, /* special_function */ |
| 106 | "R_BPF_INSN_DISP16", /* name */ |
| 107 | FALSE, /* partial_inplace */ |
| 108 | 0xffff, /* src_mask */ |
| 109 | 0xffff, /* dst_mask */ |
| 110 | TRUE), /* pcrel_offset */ |
| 111 | |
| 112 | HOWTO (R_BPF_DATA_8_PCREL, |
| 113 | 0, /* rightshift */ |
| 114 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 115 | 8, /* bitsize */ |
| 116 | TRUE, /* pc_relative */ |
| 117 | 0, /* bitpos */ |
| 118 | complain_overflow_signed, /* complain_on_overflow */ |
| 119 | bfd_elf_generic_reloc, /* special_function */ |
| 120 | "R_BPF_8_PCREL", /* name */ |
| 121 | FALSE, /* partial_inplace */ |
| 122 | 0, /* src_mask */ |
| 123 | 0xff, /* dst_mask */ |
| 124 | TRUE), /* pcrel_offset */ |
| 125 | |
| 126 | HOWTO (R_BPF_DATA_16_PCREL, |
| 127 | 0, /* rightshift */ |
| 128 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 129 | 16, /* bitsize */ |
| 130 | TRUE, /* pc_relative */ |
| 131 | 0, /* bitpos */ |
| 132 | complain_overflow_signed, /* complain_on_overflow */ |
| 133 | bfd_elf_generic_reloc, /* special_function */ |
| 134 | "R_BPF_16_PCREL", /* name */ |
| 135 | FALSE, /* partial_inplace */ |
| 136 | 0, /* src_mask */ |
| 137 | 0xffff, /* dst_mask */ |
| 138 | TRUE), /* pcrel_offset */ |
| 139 | |
| 140 | HOWTO (R_BPF_DATA_32_PCREL, |
| 141 | 0, /* rightshift */ |
| 142 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 143 | 32, /* bitsize */ |
| 144 | TRUE, /* pc_relative */ |
| 145 | 0, /* bitpos */ |
| 146 | complain_overflow_signed, /* complain_on_overflow */ |
| 147 | bfd_elf_generic_reloc, /* special_function */ |
| 148 | "R_BPF_32_PCREL", /* name */ |
| 149 | FALSE, /* partial_inplace */ |
| 150 | 0, /* src_mask */ |
| 151 | 0xffffffff, /* dst_mask */ |
| 152 | TRUE), /* pcrel_offset */ |
| 153 | |
| 154 | HOWTO (R_BPF_DATA_8, |
| 155 | 0, /* rightshift */ |
| 156 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 157 | 8, /* bitsize */ |
| 158 | FALSE, /* pc_relative */ |
| 159 | 0, /* bitpos */ |
| 160 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 161 | bfd_elf_generic_reloc, /* special_function */ |
| 162 | "R_BPF_DATA_8", /* name */ |
| 163 | FALSE, /* partial_inplace */ |
| 164 | 0, /* src_mask */ |
| 165 | 0xff, /* dst_mask */ |
| 166 | FALSE), /* pcrel_offset */ |
| 167 | |
| 168 | HOWTO (R_BPF_DATA_16, |
| 169 | 0, /* rightshift */ |
| 170 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 171 | 16, /* bitsize */ |
| 172 | FALSE, /* pc_relative */ |
| 173 | 0, /* bitpos */ |
| 174 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 175 | bfd_elf_generic_reloc, /* special_function */ |
| 176 | "R_BPF_DATA_16", /* name */ |
| 177 | FALSE, /* partial_inplace */ |
| 178 | 0, /* src_mask */ |
| 179 | 0xffff, /* dst_mask */ |
| 180 | FALSE), /* pcrel_offset */ |
| 181 | |
| 182 | /* 32-bit PC-relative address in call instructions. */ |
| 183 | HOWTO (R_BPF_INSN_DISP32, /* type */ |
| 184 | 0, /* rightshift */ |
| 185 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 186 | 32, /* bitsize */ |
| 187 | TRUE, /* pc_relative */ |
| 188 | 0, /* bitpos */ |
| 189 | complain_overflow_signed, /* complain_on_overflow */ |
| 190 | bfd_elf_generic_reloc, /* special_function */ |
| 191 | "R_BPF_INSN_DISP32", /* name */ |
| 192 | FALSE, /* partial_inplace */ |
| 193 | 0xffffffff, /* src_mask */ |
| 194 | 0xffffffff, /* dst_mask */ |
| 195 | TRUE), /* pcrel_offset */ |
| 196 | |
| 197 | /* 32-bit data. */ |
| 198 | HOWTO (R_BPF_DATA_32, /* type */ |
| 199 | 0, /* rightshift */ |
| 200 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 201 | 32, /* bitsize */ |
| 202 | FALSE, /* pc_relative */ |
| 203 | 0, /* bitpos */ |
| 204 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 205 | bfd_elf_generic_reloc, /* special_function */ |
| 206 | "R_BPF_DATA_32", /* name */ |
| 207 | FALSE, /* partial_inplace */ |
| 208 | 0, /* src_mask */ |
| 209 | 0xffffffff, /* dst_mask */ |
| 210 | TRUE), /* pcrel_offset */ |
| 211 | |
| 212 | /* 64-bit data. */ |
| 213 | HOWTO (R_BPF_DATA_64, /* type */ |
| 214 | 0, /* rightshift */ |
| 215 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 216 | 64, /* bitsize */ |
| 217 | FALSE, /* pc_relative */ |
| 218 | 0, /* bitpos */ |
| 219 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 220 | bfd_elf_generic_reloc, /* special_function */ |
| 221 | "R_BPF_DATA_64", /* name */ |
| 222 | FALSE, /* partial_inplace */ |
| 223 | 0, /* src_mask */ |
| 224 | MINUS_ONE, /* dst_mask */ |
| 225 | TRUE), /* pcrel_offset */ |
| 226 | |
| 227 | HOWTO (R_BPF_DATA_64_PCREL, |
| 228 | 0, /* rightshift */ |
| 229 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 230 | 64, /* bitsize */ |
| 231 | TRUE, /* pc_relative */ |
| 232 | 0, /* bitpos */ |
| 233 | complain_overflow_signed, /* complain_on_overflow */ |
| 234 | bfd_elf_generic_reloc, /* special_function */ |
| 235 | "R_BPF_64_PCREL", /* name */ |
| 236 | FALSE, /* partial_inplace */ |
| 237 | 0, /* src_mask */ |
| 238 | MINUS_ONE, /* dst_mask */ |
| 239 | TRUE), /* pcrel_offset */ |
| 240 | }; |
| 241 | #undef AHOW |
| 242 | |
| 243 | /* Map BFD reloc types to bpf ELF reloc types. */ |
| 244 | |
| 245 | static reloc_howto_type * |
| 246 | bpf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 247 | bfd_reloc_code_real_type code) |
| 248 | { |
| 249 | /* Note that the bpf_elf_howto_table is indexed by the R_ constants. |
| 250 | Thus, the order that the howto records appear in the table *must* |
| 251 | match the order of the relocation types defined in |
| 252 | include/elf/bpf.h. */ |
| 253 | |
| 254 | switch (code) |
| 255 | { |
| 256 | case BFD_RELOC_NONE: |
| 257 | return &bpf_elf_howto_table[ (int) R_BPF_NONE]; |
| 258 | |
| 259 | case BFD_RELOC_8_PCREL: |
| 260 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_8_PCREL]; |
| 261 | case BFD_RELOC_16_PCREL: |
| 262 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_16_PCREL]; |
| 263 | case BFD_RELOC_32_PCREL: |
| 264 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_32_PCREL]; |
| 265 | case BFD_RELOC_64_PCREL: |
| 266 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_64_PCREL]; |
| 267 | |
| 268 | case BFD_RELOC_8: |
| 269 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_8]; |
| 270 | case BFD_RELOC_16: |
| 271 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_16]; |
| 272 | case BFD_RELOC_32: |
| 273 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_32]; |
| 274 | case BFD_RELOC_64: |
| 275 | return &bpf_elf_howto_table[ (int) R_BPF_DATA_64]; |
| 276 | |
| 277 | case BFD_RELOC_BPF_64: |
| 278 | return &bpf_elf_howto_table[ (int) R_BPF_INSN_64]; |
| 279 | case BFD_RELOC_BPF_32: |
| 280 | return &bpf_elf_howto_table[ (int) R_BPF_INSN_32]; |
| 281 | case BFD_RELOC_BPF_16: |
| 282 | return &bpf_elf_howto_table[ (int) R_BPF_INSN_16]; |
| 283 | case BFD_RELOC_BPF_DISP16: |
| 284 | return &bpf_elf_howto_table[ (int) R_BPF_INSN_DISP16]; |
| 285 | case BFD_RELOC_BPF_DISP32: |
| 286 | return &bpf_elf_howto_table[ (int) R_BPF_INSN_DISP32]; |
| 287 | |
| 288 | default: |
| 289 | /* Pacify gcc -Wall. */ |
| 290 | return NULL; |
| 291 | } |
| 292 | return NULL; |
| 293 | } |
| 294 | |
| 295 | /* Map BFD reloc names to bpf ELF reloc names. */ |
| 296 | |
| 297 | static reloc_howto_type * |
| 298 | bpf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| 299 | { |
| 300 | unsigned int i; |
| 301 | |
| 302 | for (i = 0; i < ARRAY_SIZE (bpf_elf_howto_table); i++) |
| 303 | if (bpf_elf_howto_table[i].name != NULL |
| 304 | && strcasecmp (bpf_elf_howto_table[i].name, r_name) == 0) |
| 305 | return &bpf_elf_howto_table[i]; |
| 306 | |
| 307 | return NULL; |
| 308 | } |
| 309 | |
| 310 | /* Set the howto pointer for a bpf reloc. */ |
| 311 | |
| 312 | static bfd_boolean |
| 313 | bpf_info_to_howto (bfd *abfd, arelent *bfd_reloc, |
| 314 | Elf_Internal_Rela *elf_reloc) |
| 315 | { |
| 316 | unsigned int r_type; |
| 317 | |
| 318 | r_type = ELF64_R_TYPE (elf_reloc->r_info); |
| 319 | if (r_type >= (unsigned int) R_BPF_max) |
| 320 | { |
| 321 | /* xgettext:c-format */ |
| 322 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 323 | abfd, r_type); |
| 324 | bfd_set_error (bfd_error_bad_value); |
| 325 | return FALSE; |
| 326 | } |
| 327 | |
| 328 | bfd_reloc->howto = &bpf_elf_howto_table [r_type]; |
| 329 | return TRUE; |
| 330 | } |
| 331 | |
| 332 | /* Relocate an eBPF ELF section. |
| 333 | |
| 334 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 335 | to handle the relocations for a section. |
| 336 | |
| 337 | The relocs are always passed as Rela structures; if the section |
| 338 | actually uses Rel structures, the r_addend field will always be |
| 339 | zero. |
| 340 | |
| 341 | This function is responsible for adjusting the section contents as |
| 342 | necessary, and (if using Rela relocs and generating a relocatable |
| 343 | output file) adjusting the reloc addend as necessary. |
| 344 | |
| 345 | This function does not have to worry about setting the reloc |
| 346 | address or the reloc symbol index. |
| 347 | |
| 348 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 349 | |
| 350 | LOCAL_SECTIONS is an array giving the section in the input file |
| 351 | corresponding to the st_shndx field of each local symbol. |
| 352 | |
| 353 | The global hash table entry for the global symbols can be found |
| 354 | via elf_sym_hashes (input_bfd). |
| 355 | |
| 356 | When generating relocatable output, this function must handle |
| 357 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 358 | going to be the section symbol corresponding to the output |
| 359 | section, which means that the addend must be adjusted |
| 360 | accordingly. */ |
| 361 | |
| 362 | #define sec_addr(sec) ((sec)->output_section->vma + (sec)->output_offset) |
| 363 | |
| 364 | static bfd_boolean |
| 365 | bpf_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 366 | struct bfd_link_info *info, |
| 367 | bfd *input_bfd, |
| 368 | asection *input_section, |
| 369 | bfd_byte *contents, |
| 370 | Elf_Internal_Rela *relocs, |
| 371 | Elf_Internal_Sym *local_syms, |
| 372 | asection **local_sections) |
| 373 | { |
| 374 | Elf_Internal_Shdr *symtab_hdr; |
| 375 | struct elf_link_hash_entry **sym_hashes; |
| 376 | Elf_Internal_Rela *rel; |
| 377 | Elf_Internal_Rela *relend; |
| 378 | |
| 379 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 380 | sym_hashes = elf_sym_hashes (input_bfd); |
| 381 | relend = relocs + input_section->reloc_count; |
| 382 | |
| 383 | for (rel = relocs; rel < relend; rel ++) |
| 384 | { |
| 385 | reloc_howto_type * howto; |
| 386 | unsigned long r_symndx; |
| 387 | Elf_Internal_Sym * sym; |
| 388 | asection * sec; |
| 389 | struct elf_link_hash_entry * h; |
| 390 | bfd_vma relocation; |
| 391 | bfd_reloc_status_type r; |
| 392 | const char * name = NULL; |
| 393 | int r_type ATTRIBUTE_UNUSED; |
| 394 | |
| 395 | r_type = ELF64_R_TYPE (rel->r_info); |
| 396 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 397 | howto = bpf_elf_howto_table + ELF64_R_TYPE (rel->r_info); |
| 398 | h = NULL; |
| 399 | sym = NULL; |
| 400 | sec = NULL; |
| 401 | |
| 402 | if (r_symndx < symtab_hdr->sh_info) |
| 403 | { |
| 404 | sym = local_syms + r_symndx; |
| 405 | sec = local_sections [r_symndx]; |
| 406 | relocation = BASEADDR (sec) + sym->st_value; |
| 407 | |
| 408 | name = bfd_elf_string_from_elf_section |
| 409 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 410 | name = name == NULL ? bfd_section_name (sec) : name; |
| 411 | } |
| 412 | else |
| 413 | { |
| 414 | bfd_boolean warned ATTRIBUTE_UNUSED; |
| 415 | bfd_boolean unresolved_reloc ATTRIBUTE_UNUSED; |
| 416 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
| 417 | |
| 418 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 419 | r_symndx, symtab_hdr, sym_hashes, |
| 420 | h, sec, relocation, |
| 421 | unresolved_reloc, warned, ignored); |
| 422 | |
| 423 | name = h->root.root.string; |
| 424 | } |
| 425 | |
| 426 | if (sec != NULL && discarded_section (sec)) |
| 427 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 428 | rel, 1, relend, howto, 0, contents); |
| 429 | |
| 430 | if (bfd_link_relocatable (info)) |
| 431 | continue; |
| 432 | |
| 433 | switch (howto->type) |
| 434 | { |
| 435 | case R_BPF_INSN_DISP16: |
| 436 | case R_BPF_INSN_DISP32: |
| 437 | { |
| 438 | bfd_signed_vma addend; |
| 439 | |
| 440 | /* Make the relocation PC-relative, and change its unit to |
| 441 | 64-bit words. */ |
| 442 | relocation -= sec_addr (input_section) + rel->r_offset; |
| 443 | /* Make it 64-bit words. */ |
| 444 | relocation = relocation / 8; |
| 445 | |
| 446 | /* Get the addend from the instruction and apply it. */ |
| 447 | addend = bfd_get (howto->bitsize, input_bfd, |
| 448 | contents + rel->r_offset |
| 449 | + (howto->bitsize == 16 ? 2 : 4)); |
| 450 | |
| 451 | if ((addend & (((~howto->src_mask) >> 1) & howto->src_mask)) != 0) |
| 452 | addend -= (((~howto->src_mask) >> 1) & howto->src_mask) << 1; |
| 453 | relocation += addend; |
| 454 | |
| 455 | /* Write out the relocated value. */ |
| 456 | bfd_put (howto->bitsize, input_bfd, relocation, |
| 457 | contents + rel->r_offset |
| 458 | + (howto->bitsize == 16 ? 2 : 4)); |
| 459 | |
| 460 | r = bfd_reloc_ok; |
| 461 | break; |
| 462 | } |
| 463 | default: |
| 464 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 465 | contents, rel->r_offset, relocation, |
| 466 | rel->r_addend); |
| 467 | } |
| 468 | |
| 469 | if (r != bfd_reloc_ok) |
| 470 | { |
| 471 | const char * msg = NULL; |
| 472 | |
| 473 | switch (r) |
| 474 | { |
| 475 | case bfd_reloc_overflow: |
| 476 | (*info->callbacks->reloc_overflow) |
| 477 | (info, (h ? &h->root : NULL), name, howto->name, |
| 478 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 479 | break; |
| 480 | |
| 481 | case bfd_reloc_undefined: |
| 482 | (*info->callbacks->undefined_symbol) |
| 483 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 484 | break; |
| 485 | |
| 486 | case bfd_reloc_outofrange: |
| 487 | msg = _("internal error: out of range error"); |
| 488 | break; |
| 489 | |
| 490 | case bfd_reloc_notsupported: |
| 491 | if (sym != NULL) /* Only if it's not an unresolved symbol. */ |
| 492 | msg = _("internal error: relocation not supported"); |
| 493 | break; |
| 494 | |
| 495 | case bfd_reloc_dangerous: |
| 496 | msg = _("internal error: dangerous relocation"); |
| 497 | break; |
| 498 | |
| 499 | default: |
| 500 | msg = _("internal error: unknown error"); |
| 501 | break; |
| 502 | } |
| 503 | |
| 504 | if (msg) |
| 505 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
| 506 | input_section, rel->r_offset); |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | return TRUE; |
| 511 | } |
| 512 | |
| 513 | /* Merge backend specific data from an object file to the output |
| 514 | object file when linking. */ |
| 515 | |
| 516 | static bfd_boolean |
| 517 | elf64_bpf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 518 | { |
| 519 | /* Check if we have the same endianness. */ |
| 520 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
| 521 | return FALSE; |
| 522 | |
| 523 | return TRUE; |
| 524 | } |
| 525 | |
| 526 | /* The macros below configure the architecture. */ |
| 527 | |
| 528 | #define TARGET_LITTLE_SYM bpf_elf64_le_vec |
| 529 | #define TARGET_LITTLE_NAME "elf64-bpfle" |
| 530 | |
| 531 | #define TARGET_BIG_SYM bpf_elf64_be_vec |
| 532 | #define TARGET_BIG_NAME "elf64-bpfbe" |
| 533 | |
| 534 | #define ELF_ARCH bfd_arch_bpf |
| 535 | #define ELF_MACHINE_CODE EM_BPF |
| 536 | |
| 537 | #define ELF_MAXPAGESIZE 0x100000 |
| 538 | |
| 539 | #define elf_info_to_howto_rel bpf_info_to_howto |
| 540 | #define elf_info_to_howto bpf_info_to_howto |
| 541 | |
| 542 | #define elf_backend_may_use_rel_p 1 |
| 543 | #define elf_backend_may_use_rela_p 0 |
| 544 | #define elf_backend_default_use_rela_p 0 |
| 545 | #define elf_backend_relocate_section bpf_elf_relocate_section |
| 546 | |
| 547 | #define elf_backend_can_gc_sections 0 |
| 548 | |
| 549 | #define elf_symbol_leading_char '_' |
| 550 | #define bfd_elf64_bfd_reloc_type_lookup bpf_reloc_type_lookup |
| 551 | #define bfd_elf64_bfd_reloc_name_lookup bpf_reloc_name_lookup |
| 552 | |
| 553 | #define bfd_elf64_bfd_merge_private_bfd_data elf64_bpf_merge_private_bfd_data |
| 554 | |
| 555 | #include "elf64-target.h" |