| 1 | /* ft32-specific support for 32-bit ELF. |
| 2 | Copyright (C) 2013-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | Copied from elf32-moxie.c which is.. |
| 5 | Copyright (C) 2009-2015 Free Software Foundation, Inc. |
| 6 | Free Software Foundation, Inc. |
| 7 | |
| 8 | This file is part of BFD, the Binary File Descriptor library. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 23 | MA 02110-1301, USA. */ |
| 24 | |
| 25 | #include "sysdep.h" |
| 26 | #include "bfd.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "elf-bfd.h" |
| 29 | #include "elf/ft32.h" |
| 30 | |
| 31 | /* Forward declarations. */ |
| 32 | |
| 33 | static reloc_howto_type ft32_elf_howto_table [] = |
| 34 | { |
| 35 | /* This reloc does nothing. */ |
| 36 | HOWTO (R_FT32_NONE, /* type */ |
| 37 | 0, /* rightshift */ |
| 38 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 39 | 32, /* bitsize */ |
| 40 | FALSE, /* pc_relative */ |
| 41 | 0, /* bitpos */ |
| 42 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 43 | bfd_elf_generic_reloc, /* special_function */ |
| 44 | "R_FT32_NONE", /* name */ |
| 45 | FALSE, /* partial_inplace */ |
| 46 | 0, /* src_mask */ |
| 47 | 0, /* dst_mask */ |
| 48 | FALSE), /* pcrel_offset */ |
| 49 | |
| 50 | /* A 32 bit absolute relocation. */ |
| 51 | |
| 52 | HOWTO (R_FT32_32, /* type */ |
| 53 | 0, /* rightshift */ |
| 54 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 55 | 32, /* bitsize */ |
| 56 | FALSE, /* pc_relative */ |
| 57 | 0, /* bitpos */ |
| 58 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 59 | bfd_elf_generic_reloc, /* special_function */ |
| 60 | "R_FT32_32", /* name */ |
| 61 | FALSE, /* partial_inplace */ |
| 62 | 0x00000000, /* src_mask */ |
| 63 | 0xffffffff, /* dst_mask */ |
| 64 | FALSE), /* pcrel_offset */ |
| 65 | |
| 66 | HOWTO (R_FT32_16, /* type */ |
| 67 | 0, /* rightshift */ |
| 68 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 69 | 16, /* bitsize */ |
| 70 | FALSE, /* pc_relative */ |
| 71 | 0, /* bitpos */ |
| 72 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 73 | bfd_elf_generic_reloc, /* special_function */ |
| 74 | "R_FT32_16", /* name */ |
| 75 | FALSE, /* partial_inplace */ |
| 76 | 0x00000000, /* src_mask */ |
| 77 | 0x0000ffff, /* dst_mask */ |
| 78 | FALSE), /* pcrel_offset */ |
| 79 | |
| 80 | HOWTO (R_FT32_8, /* type */ |
| 81 | 0, /* rightshift */ |
| 82 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 83 | 8, /* bitsize */ |
| 84 | FALSE, /* pc_relative */ |
| 85 | 0, /* bitpos */ |
| 86 | complain_overflow_signed, /* complain_on_overflow */ |
| 87 | bfd_elf_generic_reloc, /* special_function */ |
| 88 | "R_FT32_8", /* name */ |
| 89 | FALSE, /* partial_inplace */ |
| 90 | 0x00000000, /* src_mask */ |
| 91 | 0x000000ff, /* dst_mask */ |
| 92 | FALSE), /* pcrel_offset */ |
| 93 | |
| 94 | HOWTO (R_FT32_10, /* type */ |
| 95 | 0, /* rightshift */ |
| 96 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 97 | 10, /* bitsize */ |
| 98 | FALSE, /* pc_relative */ |
| 99 | 4, /* bitpos */ |
| 100 | complain_overflow_signed, /* complain_on_overflow */ |
| 101 | bfd_elf_generic_reloc, /* special_function */ |
| 102 | "R_FT32_10", /* name */ |
| 103 | FALSE, /* partial_inplace */ |
| 104 | 0x00000000, /* src_mask */ |
| 105 | 0x00003ff0, /* dst_mask */ |
| 106 | FALSE), /* pcrel_offset */ |
| 107 | |
| 108 | HOWTO (R_FT32_20, /* type */ |
| 109 | 0, /* rightshift */ |
| 110 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 111 | 20, /* bitsize */ |
| 112 | FALSE, /* pc_relative */ |
| 113 | 0, /* bitpos */ |
| 114 | complain_overflow_dont, /* complain_on_overflow */ |
| 115 | bfd_elf_generic_reloc, /* special_function */ |
| 116 | "R_FT32_20", /* name */ |
| 117 | FALSE, /* partial_inplace */ |
| 118 | 0x00000000, /* src_mask */ |
| 119 | 0x000fffff, /* dst_mask */ |
| 120 | FALSE), /* pcrel_offset */ |
| 121 | |
| 122 | HOWTO (R_FT32_17, /* type */ |
| 123 | 0, /* rightshift */ |
| 124 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 125 | 17, /* bitsize */ |
| 126 | FALSE, /* pc_relative */ |
| 127 | 0, /* bitpos */ |
| 128 | complain_overflow_dont, /* complain_on_overflow */ |
| 129 | bfd_elf_generic_reloc, /* special_function */ |
| 130 | "R_FT32_17", /* name */ |
| 131 | FALSE, /* partial_inplace */ |
| 132 | 0x00000000, /* src_mask */ |
| 133 | 0x0001ffff, /* dst_mask */ |
| 134 | FALSE), /* pcrel_offset */ |
| 135 | |
| 136 | HOWTO (R_FT32_18, /* type */ |
| 137 | 2, /* rightshift */ |
| 138 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 139 | 18, /* bitsize */ |
| 140 | FALSE, /* pc_relative */ |
| 141 | 0, /* bitpos */ |
| 142 | complain_overflow_signed, /* complain_on_overflow */ |
| 143 | bfd_elf_generic_reloc, /* special_function */ |
| 144 | "R_FT32_18", /* name */ |
| 145 | FALSE, /* partial_inplace */ |
| 146 | 0x00000000, /* src_mask */ |
| 147 | 0x0003ffff, /* dst_mask */ |
| 148 | FALSE), /* pcrel_offset */ |
| 149 | |
| 150 | }; |
| 151 | \f |
| 152 | /* Map BFD reloc types to FT32 ELF reloc types. */ |
| 153 | |
| 154 | struct ft32_reloc_map |
| 155 | { |
| 156 | bfd_reloc_code_real_type bfd_reloc_val; |
| 157 | unsigned int ft32_reloc_val; |
| 158 | }; |
| 159 | |
| 160 | static const struct ft32_reloc_map ft32_reloc_map [] = |
| 161 | { |
| 162 | { BFD_RELOC_NONE, R_FT32_NONE }, |
| 163 | { BFD_RELOC_32, R_FT32_20 }, |
| 164 | { BFD_RELOC_16, R_FT32_16 }, |
| 165 | { BFD_RELOC_8, R_FT32_8 }, |
| 166 | { BFD_RELOC_FT32_10, R_FT32_10 }, |
| 167 | { BFD_RELOC_FT32_20, R_FT32_20 }, |
| 168 | { BFD_RELOC_FT32_17, R_FT32_17 }, |
| 169 | { BFD_RELOC_FT32_18, R_FT32_18 }, |
| 170 | }; |
| 171 | |
| 172 | static reloc_howto_type * |
| 173 | ft32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 174 | bfd_reloc_code_real_type code) |
| 175 | { |
| 176 | unsigned int i; |
| 177 | |
| 178 | for (i = sizeof (ft32_reloc_map) / sizeof (ft32_reloc_map[0]); |
| 179 | --i;) |
| 180 | if (ft32_reloc_map [i].bfd_reloc_val == code) |
| 181 | return & ft32_elf_howto_table [ft32_reloc_map[i].ft32_reloc_val]; |
| 182 | |
| 183 | return NULL; |
| 184 | } |
| 185 | |
| 186 | static reloc_howto_type * |
| 187 | ft32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| 188 | { |
| 189 | unsigned int i; |
| 190 | |
| 191 | for (i = 0; |
| 192 | i < sizeof (ft32_elf_howto_table) / sizeof (ft32_elf_howto_table[0]); |
| 193 | i++) |
| 194 | if (ft32_elf_howto_table[i].name != NULL |
| 195 | && strcasecmp (ft32_elf_howto_table[i].name, r_name) == 0) |
| 196 | return &ft32_elf_howto_table[i]; |
| 197 | |
| 198 | return NULL; |
| 199 | } |
| 200 | |
| 201 | /* Set the howto pointer for an FT32 ELF reloc. */ |
| 202 | |
| 203 | static void |
| 204 | ft32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
| 205 | arelent *cache_ptr, |
| 206 | Elf_Internal_Rela *dst) |
| 207 | { |
| 208 | unsigned int r_type; |
| 209 | |
| 210 | r_type = ELF32_R_TYPE (dst->r_info); |
| 211 | BFD_ASSERT (r_type < (unsigned int) R_FT32_max); |
| 212 | cache_ptr->howto = & ft32_elf_howto_table [r_type]; |
| 213 | } |
| 214 | \f |
| 215 | /* Relocate an FT32 ELF section. |
| 216 | |
| 217 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 218 | to handle the relocations for a section. |
| 219 | |
| 220 | The relocs are always passed as Rela structures; if the section |
| 221 | actually uses Rel structures, the r_addend field will always be |
| 222 | zero. |
| 223 | |
| 224 | This function is responsible for adjusting the section contents as |
| 225 | necessary, and (if using Rela relocs and generating a relocatable |
| 226 | output file) adjusting the reloc addend as necessary. |
| 227 | |
| 228 | This function does not have to worry about setting the reloc |
| 229 | address or the reloc symbol index. |
| 230 | |
| 231 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 232 | |
| 233 | LOCAL_SECTIONS is an array giving the section in the input file |
| 234 | corresponding to the st_shndx field of each local symbol. |
| 235 | |
| 236 | The global hash table entry for the global symbols can be found |
| 237 | via elf_sym_hashes (input_bfd). |
| 238 | |
| 239 | When generating relocatable output, this function must handle |
| 240 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 241 | going to be the section symbol corresponding to the output |
| 242 | section, which means that the addend must be adjusted |
| 243 | accordingly. */ |
| 244 | |
| 245 | static bfd_boolean |
| 246 | ft32_elf_relocate_section (bfd *output_bfd, |
| 247 | struct bfd_link_info *info, |
| 248 | bfd *input_bfd, |
| 249 | asection *input_section, |
| 250 | bfd_byte *contents, |
| 251 | Elf_Internal_Rela *relocs, |
| 252 | Elf_Internal_Sym *local_syms, |
| 253 | asection **local_sections) |
| 254 | { |
| 255 | Elf_Internal_Shdr *symtab_hdr; |
| 256 | struct elf_link_hash_entry **sym_hashes; |
| 257 | Elf_Internal_Rela *rel; |
| 258 | Elf_Internal_Rela *relend; |
| 259 | |
| 260 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 261 | sym_hashes = elf_sym_hashes (input_bfd); |
| 262 | relend = relocs + input_section->reloc_count; |
| 263 | |
| 264 | for (rel = relocs; rel < relend; rel ++) |
| 265 | { |
| 266 | reloc_howto_type *howto; |
| 267 | unsigned long r_symndx; |
| 268 | Elf_Internal_Sym *sym; |
| 269 | asection *sec; |
| 270 | struct elf_link_hash_entry *h; |
| 271 | bfd_vma relocation; |
| 272 | bfd_reloc_status_type r; |
| 273 | const char *name; |
| 274 | int r_type; |
| 275 | |
| 276 | r_type = ELF32_R_TYPE (rel->r_info); |
| 277 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 278 | howto = ft32_elf_howto_table + r_type; |
| 279 | h = NULL; |
| 280 | sym = NULL; |
| 281 | sec = NULL; |
| 282 | |
| 283 | if (r_symndx < symtab_hdr->sh_info) |
| 284 | { |
| 285 | sym = local_syms + r_symndx; |
| 286 | sec = local_sections [r_symndx]; |
| 287 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 288 | |
| 289 | name = bfd_elf_string_from_elf_section |
| 290 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 291 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 292 | } |
| 293 | else |
| 294 | { |
| 295 | bfd_boolean unresolved_reloc, warned, ignored; |
| 296 | |
| 297 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 298 | r_symndx, symtab_hdr, sym_hashes, |
| 299 | h, sec, relocation, |
| 300 | unresolved_reloc, warned, ignored); |
| 301 | |
| 302 | name = h->root.root.string; |
| 303 | } |
| 304 | |
| 305 | if (sec != NULL && discarded_section (sec)) |
| 306 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 307 | rel, 1, relend, howto, 0, contents); |
| 308 | |
| 309 | if (info->relocatable) |
| 310 | continue; |
| 311 | |
| 312 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 313 | contents, rel->r_offset, |
| 314 | relocation, rel->r_addend); |
| 315 | |
| 316 | if (r != bfd_reloc_ok) |
| 317 | { |
| 318 | const char * msg = NULL; |
| 319 | |
| 320 | switch (r) |
| 321 | { |
| 322 | case bfd_reloc_overflow: |
| 323 | r = info->callbacks->reloc_overflow |
| 324 | (info, (h ? &h->root : NULL), name, howto->name, |
| 325 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 326 | break; |
| 327 | |
| 328 | case bfd_reloc_undefined: |
| 329 | r = info->callbacks->undefined_symbol |
| 330 | (info, name, input_bfd, input_section, rel->r_offset, |
| 331 | TRUE); |
| 332 | break; |
| 333 | |
| 334 | case bfd_reloc_outofrange: |
| 335 | msg = _("internal error: out of range error"); |
| 336 | break; |
| 337 | |
| 338 | case bfd_reloc_notsupported: |
| 339 | msg = _("internal error: unsupported relocation error"); |
| 340 | break; |
| 341 | |
| 342 | case bfd_reloc_dangerous: |
| 343 | msg = _("internal error: dangerous relocation"); |
| 344 | break; |
| 345 | |
| 346 | default: |
| 347 | msg = _("internal error: unknown error"); |
| 348 | break; |
| 349 | } |
| 350 | |
| 351 | if (msg) |
| 352 | r = info->callbacks->warning |
| 353 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 354 | |
| 355 | if (! r) |
| 356 | return FALSE; |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | return TRUE; |
| 361 | } |
| 362 | \f |
| 363 | #define ELF_ARCH bfd_arch_ft32 |
| 364 | #define ELF_MACHINE_CODE EM_FT32 |
| 365 | #define ELF_MAXPAGESIZE 0x1 |
| 366 | |
| 367 | #define TARGET_LITTLE_SYM ft32_elf32_vec |
| 368 | #define TARGET_LITTLE_NAME "elf32-ft32" |
| 369 | |
| 370 | #define elf_info_to_howto_rel NULL |
| 371 | #define elf_info_to_howto ft32_info_to_howto_rela |
| 372 | #define elf_backend_relocate_section ft32_elf_relocate_section |
| 373 | |
| 374 | #define elf_backend_can_gc_sections 1 |
| 375 | #define elf_backend_rela_normal 1 |
| 376 | |
| 377 | #define bfd_elf32_bfd_reloc_type_lookup ft32_reloc_type_lookup |
| 378 | #define bfd_elf32_bfd_reloc_name_lookup ft32_reloc_name_lookup |
| 379 | |
| 380 | #include "elf32-target.h" |