| 1 | /* BFD back-end for National Semiconductor's CR16 ELF |
| 2 | Copyright 2007, 2008, 2009 Free Software Foundation, Inc. |
| 3 | Written by M R Swami Reddy. |
| 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 Foundation, |
| 19 | Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "libiberty.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/cr16.h" |
| 28 | |
| 29 | /* The cr16 linker needs to keep track of the number of relocs that |
| 30 | it decides to copy in check_relocs for each symbol. This is so |
| 31 | that it can discard PC relative relocs if it doesn't need them when |
| 32 | linking with -Bsymbolic. We store the information in a field |
| 33 | extending the regular ELF linker hash table. */ |
| 34 | |
| 35 | struct elf32_cr16_link_hash_entry { |
| 36 | /* The basic elf link hash table entry. */ |
| 37 | struct elf_link_hash_entry root; |
| 38 | |
| 39 | /* For function symbols, the number of times this function is |
| 40 | called directly (ie by name). */ |
| 41 | unsigned int direct_calls; |
| 42 | |
| 43 | /* For function symbols, the size of this function's stack |
| 44 | (if <= 255 bytes). We stuff this into "call" instructions |
| 45 | to this target when it's valid and profitable to do so. |
| 46 | |
| 47 | This does not include stack allocated by movm! */ |
| 48 | unsigned char stack_size; |
| 49 | |
| 50 | /* For function symbols, arguments (if any) for movm instruction |
| 51 | in the prologue. We stuff this value into "call" instructions |
| 52 | to the target when it's valid and profitable to do so. */ |
| 53 | unsigned char movm_args; |
| 54 | |
| 55 | /* For function symbols, the amount of stack space that would be allocated |
| 56 | by the movm instruction. This is redundant with movm_args, but we |
| 57 | add it to the hash table to avoid computing it over and over. */ |
| 58 | unsigned char movm_stack_size; |
| 59 | |
| 60 | /* Used to mark functions which have had redundant parts of their |
| 61 | prologue deleted. */ |
| 62 | #define CR16_DELETED_PROLOGUE_BYTES 0x1 |
| 63 | unsigned char flags; |
| 64 | |
| 65 | /* Calculated value. */ |
| 66 | bfd_vma value; |
| 67 | }; |
| 68 | |
| 69 | /* We derive a hash table from the main elf linker hash table so |
| 70 | we can store state variables and a secondary hash table without |
| 71 | resorting to global variables. */ |
| 72 | struct elf32_cr16_link_hash_table { |
| 73 | /* The main hash table. */ |
| 74 | struct elf_link_hash_table root; |
| 75 | |
| 76 | /* A hash table for static functions. We could derive a new hash table |
| 77 | instead of using the full elf32_cr16_link_hash_table if we wanted |
| 78 | to save some memory. */ |
| 79 | struct elf32_cr16_link_hash_table *static_hash_table; |
| 80 | |
| 81 | /* Random linker state flags. */ |
| 82 | #define CR16_HASH_ENTRIES_INITIALIZED 0x1 |
| 83 | char flags; |
| 84 | }; |
| 85 | |
| 86 | /* For CR16 linker hash table. */ |
| 87 | |
| 88 | /* Get the CR16 ELF linker hash table from a link_info structure. */ |
| 89 | |
| 90 | #define elf32_cr16_hash_table(p) \ |
| 91 | ((struct elf32_cr16_link_hash_table *) ((p)->hash)) |
| 92 | |
| 93 | #define elf32_cr16_link_hash_traverse(table, func, info) \ |
| 94 | (elf_link_hash_traverse \ |
| 95 | (&(table)->root, \ |
| 96 | (bfd_boolean (*) ((struct elf_link_hash_entry *, void *))) (func), (info))) |
| 97 | |
| 98 | /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ |
| 99 | |
| 100 | struct cr16_reloc_map |
| 101 | { |
| 102 | bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ |
| 103 | unsigned short cr16_reloc_type; /* CR16 relocation type. */ |
| 104 | }; |
| 105 | |
| 106 | static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] = |
| 107 | { |
| 108 | {BFD_RELOC_NONE, R_CR16_NONE}, |
| 109 | {BFD_RELOC_CR16_NUM8, R_CR16_NUM8}, |
| 110 | {BFD_RELOC_CR16_NUM16, R_CR16_NUM16}, |
| 111 | {BFD_RELOC_CR16_NUM32, R_CR16_NUM32}, |
| 112 | {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a}, |
| 113 | {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4}, |
| 114 | {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a}, |
| 115 | {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14}, |
| 116 | {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a}, |
| 117 | {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16}, |
| 118 | {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20}, |
| 119 | {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a}, |
| 120 | {BFD_RELOC_CR16_ABS20, R_CR16_ABS20}, |
| 121 | {BFD_RELOC_CR16_ABS24, R_CR16_ABS24}, |
| 122 | {BFD_RELOC_CR16_IMM4, R_CR16_IMM4}, |
| 123 | {BFD_RELOC_CR16_IMM8, R_CR16_IMM8}, |
| 124 | {BFD_RELOC_CR16_IMM16, R_CR16_IMM16}, |
| 125 | {BFD_RELOC_CR16_IMM20, R_CR16_IMM20}, |
| 126 | {BFD_RELOC_CR16_IMM24, R_CR16_IMM24}, |
| 127 | {BFD_RELOC_CR16_IMM32, R_CR16_IMM32}, |
| 128 | {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a}, |
| 129 | {BFD_RELOC_CR16_DISP4, R_CR16_DISP4}, |
| 130 | {BFD_RELOC_CR16_DISP8, R_CR16_DISP8}, |
| 131 | {BFD_RELOC_CR16_DISP16, R_CR16_DISP16}, |
| 132 | {BFD_RELOC_CR16_DISP24, R_CR16_DISP24}, |
| 133 | {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a}, |
| 134 | {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8}, |
| 135 | {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16}, |
| 136 | {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32}, |
| 137 | {BFD_RELOC_CR16_GOT_REGREL20, R_CR16_GOT_REGREL20}, |
| 138 | {BFD_RELOC_CR16_GOTC_REGREL20, R_CR16_GOTC_REGREL20}, |
| 139 | {BFD_RELOC_CR16_GLOB_DAT, R_CR16_GLOB_DAT} |
| 140 | }; |
| 141 | |
| 142 | static reloc_howto_type cr16_elf_howto_table[] = |
| 143 | { |
| 144 | HOWTO (R_CR16_NONE, /* type */ |
| 145 | 0, /* rightshift */ |
| 146 | 2, /* size */ |
| 147 | 32, /* bitsize */ |
| 148 | FALSE, /* pc_relative */ |
| 149 | 0, /* bitpos */ |
| 150 | complain_overflow_dont, /* complain_on_overflow */ |
| 151 | bfd_elf_generic_reloc, /* special_function */ |
| 152 | "R_CR16_NONE", /* name */ |
| 153 | FALSE, /* partial_inplace */ |
| 154 | 0, /* src_mask */ |
| 155 | 0, /* dst_mask */ |
| 156 | FALSE), /* pcrel_offset */ |
| 157 | |
| 158 | HOWTO (R_CR16_NUM8, /* type */ |
| 159 | 0, /* rightshift */ |
| 160 | 0, /* size */ |
| 161 | 8, /* bitsize */ |
| 162 | FALSE, /* pc_relative */ |
| 163 | 0, /* bitpos */ |
| 164 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 165 | bfd_elf_generic_reloc, /* special_function */ |
| 166 | "R_CR16_NUM8", /* name */ |
| 167 | FALSE, /* partial_inplace */ |
| 168 | 0x0, /* src_mask */ |
| 169 | 0xff, /* dst_mask */ |
| 170 | FALSE), /* pcrel_offset */ |
| 171 | |
| 172 | HOWTO (R_CR16_NUM16, /* type */ |
| 173 | 0, /* rightshift */ |
| 174 | 1, /* size */ |
| 175 | 16, /* bitsize */ |
| 176 | FALSE, /* pc_relative */ |
| 177 | 0, /* bitpos */ |
| 178 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 179 | bfd_elf_generic_reloc, /* special_function */ |
| 180 | "R_CR16_NUM16", /* name */ |
| 181 | FALSE, /* partial_inplace */ |
| 182 | 0x0, /* src_mask */ |
| 183 | 0xffff, /* dst_mask */ |
| 184 | FALSE), /* pcrel_offset */ |
| 185 | |
| 186 | HOWTO (R_CR16_NUM32, /* type */ |
| 187 | 0, /* rightshift */ |
| 188 | 2, /* size */ |
| 189 | 32, /* bitsize */ |
| 190 | FALSE, /* pc_relative */ |
| 191 | 0, /* bitpos */ |
| 192 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 193 | bfd_elf_generic_reloc, /* special_function */ |
| 194 | "R_CR16_NUM32", /* name */ |
| 195 | FALSE, /* partial_inplace */ |
| 196 | 0x0, /* src_mask */ |
| 197 | 0xffffffff, /* dst_mask */ |
| 198 | FALSE), /* pcrel_offset */ |
| 199 | |
| 200 | HOWTO (R_CR16_NUM32a, /* type */ |
| 201 | 1, /* rightshift */ |
| 202 | 2, /* size */ |
| 203 | 32, /* bitsize */ |
| 204 | FALSE, /* pc_relative */ |
| 205 | 0, /* bitpos */ |
| 206 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 207 | bfd_elf_generic_reloc, /* special_function */ |
| 208 | "R_CR16_NUM32a", /* name */ |
| 209 | FALSE, /* partial_inplace */ |
| 210 | 0x0, /* src_mask */ |
| 211 | 0xffffffff, /* dst_mask */ |
| 212 | FALSE), /* pcrel_offset */ |
| 213 | |
| 214 | HOWTO (R_CR16_REGREL4, /* type */ |
| 215 | 0, /* rightshift */ |
| 216 | 0, /* size */ |
| 217 | 4, /* bitsize */ |
| 218 | FALSE, /* pc_relative */ |
| 219 | 0, /* bitpos */ |
| 220 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 221 | bfd_elf_generic_reloc, /* special_function */ |
| 222 | "R_CR16_REGREL4", /* name */ |
| 223 | FALSE, /* partial_inplace */ |
| 224 | 0x0, /* src_mask */ |
| 225 | 0xf, /* dst_mask */ |
| 226 | FALSE), /* pcrel_offset */ |
| 227 | |
| 228 | HOWTO (R_CR16_REGREL4a, /* type */ |
| 229 | 0, /* rightshift */ |
| 230 | 0, /* size */ |
| 231 | 4, /* bitsize */ |
| 232 | FALSE, /* pc_relative */ |
| 233 | 0, /* bitpos */ |
| 234 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 235 | bfd_elf_generic_reloc, /* special_function */ |
| 236 | "R_CR16_REGREL4a", /* name */ |
| 237 | FALSE, /* partial_inplace */ |
| 238 | 0x0, /* src_mask */ |
| 239 | 0xf, /* dst_mask */ |
| 240 | FALSE), /* pcrel_offset */ |
| 241 | |
| 242 | HOWTO (R_CR16_REGREL14, /* type */ |
| 243 | 0, /* rightshift */ |
| 244 | 1, /* size */ |
| 245 | 14, /* bitsize */ |
| 246 | FALSE, /* pc_relative */ |
| 247 | 0, /* bitpos */ |
| 248 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 249 | bfd_elf_generic_reloc, /* special_function */ |
| 250 | "R_CR16_REGREL14", /* name */ |
| 251 | FALSE, /* partial_inplace */ |
| 252 | 0x0, /* src_mask */ |
| 253 | 0x3fff, /* dst_mask */ |
| 254 | FALSE), /* pcrel_offset */ |
| 255 | |
| 256 | HOWTO (R_CR16_REGREL14a, /* type */ |
| 257 | 0, /* rightshift */ |
| 258 | 1, /* size */ |
| 259 | 14, /* bitsize */ |
| 260 | FALSE, /* pc_relative */ |
| 261 | 0, /* bitpos */ |
| 262 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 263 | bfd_elf_generic_reloc, /* special_function */ |
| 264 | "R_CR16_REGREL14a", /* name */ |
| 265 | FALSE, /* partial_inplace */ |
| 266 | 0x0, /* src_mask */ |
| 267 | 0x3fff, /* dst_mask */ |
| 268 | FALSE), /* pcrel_offset */ |
| 269 | |
| 270 | HOWTO (R_CR16_REGREL16, /* type */ |
| 271 | 0, /* rightshift */ |
| 272 | 1, /* size */ |
| 273 | 16, /* bitsize */ |
| 274 | FALSE, /* pc_relative */ |
| 275 | 0, /* bitpos */ |
| 276 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 277 | bfd_elf_generic_reloc, /* special_function */ |
| 278 | "R_CR16_REGREL16", /* name */ |
| 279 | FALSE, /* partial_inplace */ |
| 280 | 0x0, /* src_mask */ |
| 281 | 0xffff, /* dst_mask */ |
| 282 | FALSE), /* pcrel_offset */ |
| 283 | |
| 284 | HOWTO (R_CR16_REGREL20, /* type */ |
| 285 | 0, /* rightshift */ |
| 286 | 2, /* size */ |
| 287 | 20, /* bitsize */ |
| 288 | FALSE, /* pc_relative */ |
| 289 | 0, /* bitpos */ |
| 290 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 291 | bfd_elf_generic_reloc, /* special_function */ |
| 292 | "R_CR16_REGREL20", /* name */ |
| 293 | FALSE, /* partial_inplace */ |
| 294 | 0x0, /* src_mask */ |
| 295 | 0xfffff, /* dst_mask */ |
| 296 | FALSE), /* pcrel_offset */ |
| 297 | |
| 298 | HOWTO (R_CR16_REGREL20a, /* type */ |
| 299 | 0, /* rightshift */ |
| 300 | 2, /* size */ |
| 301 | 20, /* bitsize */ |
| 302 | FALSE, /* pc_relative */ |
| 303 | 0, /* bitpos */ |
| 304 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 305 | bfd_elf_generic_reloc, /* special_function */ |
| 306 | "R_CR16_REGREL20a", /* name */ |
| 307 | FALSE, /* partial_inplace */ |
| 308 | 0x0, /* src_mask */ |
| 309 | 0xfffff, /* dst_mask */ |
| 310 | FALSE), /* pcrel_offset */ |
| 311 | |
| 312 | HOWTO (R_CR16_ABS20, /* type */ |
| 313 | 0, /* rightshift */ |
| 314 | 2, /* size */ |
| 315 | 20, /* bitsize */ |
| 316 | FALSE, /* pc_relative */ |
| 317 | 0, /* bitpos */ |
| 318 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 319 | bfd_elf_generic_reloc, /* special_function */ |
| 320 | "R_CR16_ABS20", /* name */ |
| 321 | FALSE, /* partial_inplace */ |
| 322 | 0x0, /* src_mask */ |
| 323 | 0xfffff, /* dst_mask */ |
| 324 | FALSE), /* pcrel_offset */ |
| 325 | |
| 326 | HOWTO (R_CR16_ABS24, /* type */ |
| 327 | 0, /* rightshift */ |
| 328 | 2, /* size */ |
| 329 | 24, /* bitsize */ |
| 330 | FALSE, /* pc_relative */ |
| 331 | 0, /* bitpos */ |
| 332 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 333 | bfd_elf_generic_reloc, /* special_function */ |
| 334 | "R_CR16_ABS24", /* name */ |
| 335 | FALSE, /* partial_inplace */ |
| 336 | 0x0, /* src_mask */ |
| 337 | 0xffffff, /* dst_mask */ |
| 338 | FALSE), /* pcrel_offset */ |
| 339 | |
| 340 | HOWTO (R_CR16_IMM4, /* type */ |
| 341 | 0, /* rightshift */ |
| 342 | 0, /* size */ |
| 343 | 4, /* bitsize */ |
| 344 | FALSE, /* pc_relative */ |
| 345 | 0, /* bitpos */ |
| 346 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 347 | bfd_elf_generic_reloc, /* special_function */ |
| 348 | "R_CR16_IMM4", /* name */ |
| 349 | FALSE, /* partial_inplace */ |
| 350 | 0x0, /* src_mask */ |
| 351 | 0xf, /* dst_mask */ |
| 352 | FALSE), /* pcrel_offset */ |
| 353 | |
| 354 | HOWTO (R_CR16_IMM8, /* type */ |
| 355 | 0, /* rightshift */ |
| 356 | 0, /* size */ |
| 357 | 8, /* bitsize */ |
| 358 | FALSE, /* pc_relative */ |
| 359 | 0, /* bitpos */ |
| 360 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 361 | bfd_elf_generic_reloc, /* special_function */ |
| 362 | "R_CR16_IMM8", /* name */ |
| 363 | FALSE, /* partial_inplace */ |
| 364 | 0x0, /* src_mask */ |
| 365 | 0xff, /* dst_mask */ |
| 366 | FALSE), /* pcrel_offset */ |
| 367 | |
| 368 | HOWTO (R_CR16_IMM16, /* type */ |
| 369 | 0, /* rightshift */ |
| 370 | 1, /* size */ |
| 371 | 16, /* bitsize */ |
| 372 | FALSE, /* pc_relative */ |
| 373 | 0, /* bitpos */ |
| 374 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 375 | bfd_elf_generic_reloc, /* special_function */ |
| 376 | "R_CR16_IMM16", /* name */ |
| 377 | FALSE, /* partial_inplace */ |
| 378 | 0x0, /* src_mask */ |
| 379 | 0xffff, /* dst_mask */ |
| 380 | FALSE), /* pcrel_offset */ |
| 381 | |
| 382 | HOWTO (R_CR16_IMM20, /* type */ |
| 383 | 0, /* rightshift */ |
| 384 | 2, /* size */ |
| 385 | 20, /* bitsize */ |
| 386 | FALSE, /* pc_relative */ |
| 387 | 0, /* bitpos */ |
| 388 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 389 | bfd_elf_generic_reloc, /* special_function */ |
| 390 | "R_CR16_IMM20", /* name */ |
| 391 | FALSE, /* partial_inplace */ |
| 392 | 0x0, /* src_mask */ |
| 393 | 0xfffff, /* dst_mask */ |
| 394 | FALSE), /* pcrel_offset */ |
| 395 | |
| 396 | HOWTO (R_CR16_IMM24, /* type */ |
| 397 | 0, /* rightshift */ |
| 398 | 2, /* size */ |
| 399 | 24, /* bitsize */ |
| 400 | FALSE, /* pc_relative */ |
| 401 | 0, /* bitpos */ |
| 402 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 403 | bfd_elf_generic_reloc, /* special_function */ |
| 404 | "R_CR16_IMM24", /* name */ |
| 405 | FALSE, /* partial_inplace */ |
| 406 | 0x0, /* src_mask */ |
| 407 | 0xffffff, /* dst_mask */ |
| 408 | FALSE), /* pcrel_offset */ |
| 409 | |
| 410 | HOWTO (R_CR16_IMM32, /* type */ |
| 411 | 0, /* rightshift */ |
| 412 | 2, /* size */ |
| 413 | 32, /* bitsize */ |
| 414 | FALSE, /* pc_relative */ |
| 415 | 0, /* bitpos */ |
| 416 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 417 | bfd_elf_generic_reloc, /* special_function */ |
| 418 | "R_CR16_IMM32", /* name */ |
| 419 | FALSE, /* partial_inplace */ |
| 420 | 0x0, /* src_mask */ |
| 421 | 0xffffffff, /* dst_mask */ |
| 422 | FALSE), /* pcrel_offset */ |
| 423 | |
| 424 | HOWTO (R_CR16_IMM32a, /* type */ |
| 425 | 1, /* rightshift */ |
| 426 | 2, /* size */ |
| 427 | 32, /* bitsize */ |
| 428 | FALSE, /* pc_relative */ |
| 429 | 0, /* bitpos */ |
| 430 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 431 | bfd_elf_generic_reloc, /* special_function */ |
| 432 | "R_CR16_IMM32a", /* name */ |
| 433 | FALSE, /* partial_inplace */ |
| 434 | 0x0, /* src_mask */ |
| 435 | 0xffffffff, /* dst_mask */ |
| 436 | FALSE), /* pcrel_offset */ |
| 437 | |
| 438 | HOWTO (R_CR16_DISP4, /* type */ |
| 439 | 1, /* rightshift */ |
| 440 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 441 | 4, /* bitsize */ |
| 442 | TRUE, /* pc_relative */ |
| 443 | 0, /* bitpos */ |
| 444 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 445 | bfd_elf_generic_reloc, /* special_function */ |
| 446 | "R_CR16_DISP4", /* name */ |
| 447 | FALSE, /* partial_inplace */ |
| 448 | 0x0, /* src_mask */ |
| 449 | 0xf, /* dst_mask */ |
| 450 | FALSE), /* pcrel_offset */ |
| 451 | |
| 452 | HOWTO (R_CR16_DISP8, /* type */ |
| 453 | 1, /* rightshift */ |
| 454 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 455 | 8, /* bitsize */ |
| 456 | TRUE, /* pc_relative */ |
| 457 | 0, /* bitpos */ |
| 458 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 459 | bfd_elf_generic_reloc, /* special_function */ |
| 460 | "R_CR16_DISP8", /* name */ |
| 461 | FALSE, /* partial_inplace */ |
| 462 | 0x0, /* src_mask */ |
| 463 | 0x1ff, /* dst_mask */ |
| 464 | FALSE), /* pcrel_offset */ |
| 465 | |
| 466 | HOWTO (R_CR16_DISP16, /* type */ |
| 467 | 0, /* rightshift REVIITS: To sync with WinIDEA*/ |
| 468 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 469 | 16, /* bitsize */ |
| 470 | TRUE, /* pc_relative */ |
| 471 | 0, /* bitpos */ |
| 472 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 473 | bfd_elf_generic_reloc, /* special_function */ |
| 474 | "R_CR16_DISP16", /* name */ |
| 475 | FALSE, /* partial_inplace */ |
| 476 | 0x0, /* src_mask */ |
| 477 | 0x1ffff, /* dst_mask */ |
| 478 | FALSE), /* pcrel_offset */ |
| 479 | /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc |
| 480 | but its not done, to sync with WinIDEA and CR16 4.1 tools */ |
| 481 | HOWTO (R_CR16_DISP24, /* type */ |
| 482 | 0, /* rightshift */ |
| 483 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 484 | 24, /* bitsize */ |
| 485 | TRUE, /* pc_relative */ |
| 486 | 0, /* bitpos */ |
| 487 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 488 | bfd_elf_generic_reloc, /* special_function */ |
| 489 | "R_CR16_DISP24", /* name */ |
| 490 | FALSE, /* partial_inplace */ |
| 491 | 0x0, /* src_mask */ |
| 492 | 0x1ffffff, /* dst_mask */ |
| 493 | FALSE), /* pcrel_offset */ |
| 494 | |
| 495 | HOWTO (R_CR16_DISP24a, /* type */ |
| 496 | 0, /* rightshift */ |
| 497 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 498 | 24, /* bitsize */ |
| 499 | TRUE, /* pc_relative */ |
| 500 | 0, /* bitpos */ |
| 501 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 502 | bfd_elf_generic_reloc, /* special_function */ |
| 503 | "R_CR16_DISP24a", /* name */ |
| 504 | FALSE, /* partial_inplace */ |
| 505 | 0x0, /* src_mask */ |
| 506 | 0xffffff, /* dst_mask */ |
| 507 | FALSE), /* pcrel_offset */ |
| 508 | |
| 509 | /* An 8 bit switch table entry. This is generated for an expression |
| 510 | such as ``.byte L1 - L2''. The offset holds the difference |
| 511 | between the reloc address and L2. */ |
| 512 | HOWTO (R_CR16_SWITCH8, /* type */ |
| 513 | 0, /* rightshift */ |
| 514 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 515 | 8, /* bitsize */ |
| 516 | FALSE, /* pc_relative */ |
| 517 | 0, /* bitpos */ |
| 518 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 519 | bfd_elf_generic_reloc, /* special_function */ |
| 520 | "R_CR16_SWITCH8", /* name */ |
| 521 | FALSE, /* partial_inplace */ |
| 522 | 0x0, /* src_mask */ |
| 523 | 0xff, /* dst_mask */ |
| 524 | TRUE), /* pcrel_offset */ |
| 525 | |
| 526 | /* A 16 bit switch table entry. This is generated for an expression |
| 527 | such as ``.word L1 - L2''. The offset holds the difference |
| 528 | between the reloc address and L2. */ |
| 529 | HOWTO (R_CR16_SWITCH16, /* type */ |
| 530 | 0, /* rightshift */ |
| 531 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 532 | 16, /* bitsize */ |
| 533 | FALSE, /* pc_relative */ |
| 534 | 0, /* bitpos */ |
| 535 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 536 | bfd_elf_generic_reloc, /* special_function */ |
| 537 | "R_CR16_SWITCH16", /* name */ |
| 538 | FALSE, /* partial_inplace */ |
| 539 | 0x0, /* src_mask */ |
| 540 | 0xffff, /* dst_mask */ |
| 541 | TRUE), /* pcrel_offset */ |
| 542 | |
| 543 | /* A 32 bit switch table entry. This is generated for an expression |
| 544 | such as ``.long L1 - L2''. The offset holds the difference |
| 545 | between the reloc address and L2. */ |
| 546 | HOWTO (R_CR16_SWITCH32, /* type */ |
| 547 | 0, /* rightshift */ |
| 548 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 549 | 32, /* bitsize */ |
| 550 | FALSE, /* pc_relative */ |
| 551 | 0, /* bitpos */ |
| 552 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 553 | bfd_elf_generic_reloc, /* special_function */ |
| 554 | "R_CR16_SWITCH32", /* name */ |
| 555 | FALSE, /* partial_inplace */ |
| 556 | 0x0, /* src_mask */ |
| 557 | 0xffffffff, /* dst_mask */ |
| 558 | TRUE), /* pcrel_offset */ |
| 559 | |
| 560 | HOWTO (R_CR16_GOT_REGREL20, /* type */ |
| 561 | 0, /* rightshift */ |
| 562 | 2, /* size */ |
| 563 | 20, /* bitsize */ |
| 564 | FALSE, /* pc_relative */ |
| 565 | 0, /* bitpos */ |
| 566 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 567 | bfd_elf_generic_reloc, /* special_function */ |
| 568 | "R_CR16_GOT_REGREL20", /* name */ |
| 569 | TRUE, /* partial_inplace */ |
| 570 | 0x0, /* src_mask */ |
| 571 | 0xfffff, /* dst_mask */ |
| 572 | FALSE), /* pcrel_offset */ |
| 573 | |
| 574 | HOWTO (R_CR16_GOTC_REGREL20, /* type */ |
| 575 | 0, /* rightshift */ |
| 576 | 2, /* size */ |
| 577 | 20, /* bitsize */ |
| 578 | FALSE, /* pc_relative */ |
| 579 | 0, /* bitpos */ |
| 580 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 581 | bfd_elf_generic_reloc, /* special_function */ |
| 582 | "R_CR16_GOTC_REGREL20", /* name */ |
| 583 | TRUE, /* partial_inplace */ |
| 584 | 0x0, /* src_mask */ |
| 585 | 0xfffff, /* dst_mask */ |
| 586 | FALSE), /* pcrel_offset */ |
| 587 | |
| 588 | HOWTO (R_CR16_GLOB_DAT, /* type */ |
| 589 | 0, /* rightshift */ |
| 590 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 591 | 32, /* bitsize */ |
| 592 | FALSE, /* pc_relative */ |
| 593 | 0, /* bitpos */ |
| 594 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 595 | bfd_elf_generic_reloc, /* special_function */ |
| 596 | "R_CR16_GLOB_DAT", /* name */ |
| 597 | FALSE, /* partial_inplace */ |
| 598 | 0x0, /* src_mask */ |
| 599 | 0xffffffff, /* dst_mask */ |
| 600 | TRUE) /* pcrel_offset */ |
| 601 | }; |
| 602 | |
| 603 | |
| 604 | /* Create the GOT section. */ |
| 605 | |
| 606 | static bfd_boolean |
| 607 | _bfd_cr16_elf_create_got_section (bfd * abfd, struct bfd_link_info * info) |
| 608 | { |
| 609 | flagword flags; |
| 610 | asection * s; |
| 611 | struct elf_link_hash_entry * h; |
| 612 | const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
| 613 | int ptralign; |
| 614 | |
| 615 | /* This function may be called more than once. */ |
| 616 | if (bfd_get_section_by_name (abfd, ".got") != NULL) |
| 617 | return TRUE; |
| 618 | |
| 619 | switch (bed->s->arch_size) |
| 620 | { |
| 621 | case 16: |
| 622 | ptralign = 1; |
| 623 | break; |
| 624 | |
| 625 | case 32: |
| 626 | ptralign = 2; |
| 627 | break; |
| 628 | |
| 629 | default: |
| 630 | bfd_set_error (bfd_error_bad_value); |
| 631 | return FALSE; |
| 632 | } |
| 633 | |
| 634 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 635 | | SEC_LINKER_CREATED); |
| 636 | |
| 637 | s = bfd_make_section_with_flags (abfd, ".got", flags); |
| 638 | if (s == NULL |
| 639 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 640 | return FALSE; |
| 641 | |
| 642 | if (bed->want_got_plt) |
| 643 | { |
| 644 | s = bfd_make_section_with_flags (abfd, ".got.plt", flags); |
| 645 | if (s == NULL |
| 646 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 647 | return FALSE; |
| 648 | } |
| 649 | |
| 650 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 651 | (or .got.plt) section. We don't do this in the linker script |
| 652 | because we don't want to define the symbol if we are not creating |
| 653 | a global offset table. */ |
| 654 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_"); |
| 655 | elf_hash_table (info)->hgot = h; |
| 656 | if (h == NULL) |
| 657 | return FALSE; |
| 658 | |
| 659 | /* The first bit of the global offset table is the header. */ |
| 660 | s->size += bed->got_header_size; |
| 661 | |
| 662 | return TRUE; |
| 663 | } |
| 664 | |
| 665 | |
| 666 | /* Retrieve a howto ptr using a BFD reloc_code. */ |
| 667 | |
| 668 | static reloc_howto_type * |
| 669 | elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 670 | bfd_reloc_code_real_type code) |
| 671 | { |
| 672 | unsigned int i; |
| 673 | |
| 674 | for (i = 0; i < R_CR16_MAX; i++) |
| 675 | if (code == cr16_reloc_map[i].bfd_reloc_enum) |
| 676 | return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type]; |
| 677 | |
| 678 | _bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code); |
| 679 | return NULL; |
| 680 | } |
| 681 | |
| 682 | static reloc_howto_type * |
| 683 | elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 684 | const char *r_name) |
| 685 | { |
| 686 | unsigned int i; |
| 687 | |
| 688 | for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++) |
| 689 | if (cr16_elf_howto_table[i].name != NULL |
| 690 | && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0) |
| 691 | return cr16_elf_howto_table + i; |
| 692 | |
| 693 | return NULL; |
| 694 | } |
| 695 | |
| 696 | /* Retrieve a howto ptr using an internal relocation entry. */ |
| 697 | |
| 698 | static void |
| 699 | elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
| 700 | Elf_Internal_Rela *dst) |
| 701 | { |
| 702 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
| 703 | |
| 704 | BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX); |
| 705 | cache_ptr->howto = cr16_elf_howto_table + r_type; |
| 706 | } |
| 707 | |
| 708 | /* Look through the relocs for a section during the first phase. |
| 709 | Since we don't do .gots or .plts, we just need to consider the |
| 710 | virtual table relocs for gc. */ |
| 711 | |
| 712 | static bfd_boolean |
| 713 | cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
| 714 | const Elf_Internal_Rela *relocs) |
| 715 | { |
| 716 | Elf_Internal_Shdr *symtab_hdr; |
| 717 | Elf_Internal_Sym * isymbuf = NULL; |
| 718 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 719 | const Elf_Internal_Rela *rel; |
| 720 | const Elf_Internal_Rela *rel_end; |
| 721 | bfd * dynobj; |
| 722 | bfd_vma * local_got_offsets; |
| 723 | asection * sgot; |
| 724 | asection * srelgot; |
| 725 | |
| 726 | sgot = NULL; |
| 727 | srelgot = NULL; |
| 728 | bfd_boolean result = FALSE; |
| 729 | |
| 730 | if (info->relocatable) |
| 731 | return TRUE; |
| 732 | |
| 733 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 734 | sym_hashes = elf_sym_hashes (abfd); |
| 735 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| 736 | if (!elf_bad_symtab (abfd)) |
| 737 | sym_hashes_end -= symtab_hdr->sh_info; |
| 738 | |
| 739 | dynobj = elf_hash_table (info)->dynobj; |
| 740 | local_got_offsets = elf_local_got_offsets (abfd); |
| 741 | rel_end = relocs + sec->reloc_count; |
| 742 | for (rel = relocs; rel < rel_end; rel++) |
| 743 | { |
| 744 | struct elf_link_hash_entry *h; |
| 745 | unsigned long r_symndx; |
| 746 | |
| 747 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 748 | if (r_symndx < symtab_hdr->sh_info) |
| 749 | h = NULL; |
| 750 | else |
| 751 | { |
| 752 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 753 | while (h->root.type == bfd_link_hash_indirect |
| 754 | || h->root.type == bfd_link_hash_warning) |
| 755 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 756 | } |
| 757 | |
| 758 | /* Some relocs require a global offset table. */ |
| 759 | if (dynobj == NULL) |
| 760 | { |
| 761 | switch (ELF32_R_TYPE (rel->r_info)) |
| 762 | { |
| 763 | case R_CR16_GOT_REGREL20: |
| 764 | case R_CR16_GOTC_REGREL20: |
| 765 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 766 | if (! _bfd_cr16_elf_create_got_section (dynobj, info)) |
| 767 | goto fail; |
| 768 | break; |
| 769 | |
| 770 | default: |
| 771 | break; |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | switch (ELF32_R_TYPE (rel->r_info)) |
| 776 | { |
| 777 | case R_CR16_GOT_REGREL20: |
| 778 | case R_CR16_GOTC_REGREL20: |
| 779 | /* This symbol requires a global offset table entry. */ |
| 780 | |
| 781 | if (sgot == NULL) |
| 782 | { |
| 783 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 784 | BFD_ASSERT (sgot != NULL); |
| 785 | } |
| 786 | |
| 787 | if (srelgot == NULL |
| 788 | && (h != NULL || info->executable)) |
| 789 | { |
| 790 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 791 | if (srelgot == NULL) |
| 792 | { |
| 793 | srelgot = bfd_make_section_with_flags (dynobj, |
| 794 | ".rela.got", |
| 795 | (SEC_ALLOC |
| 796 | | SEC_LOAD |
| 797 | | SEC_HAS_CONTENTS |
| 798 | | SEC_IN_MEMORY |
| 799 | | SEC_LINKER_CREATED |
| 800 | | SEC_READONLY)); |
| 801 | if (srelgot == NULL |
| 802 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 803 | goto fail; |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | if (h != NULL) |
| 808 | { |
| 809 | if (h->got.offset != (bfd_vma) -1) |
| 810 | /* We have already allocated space in the .got. */ |
| 811 | break; |
| 812 | |
| 813 | h->got.offset = sgot->size; |
| 814 | |
| 815 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 816 | if (h->dynindx == -1) |
| 817 | { |
| 818 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 819 | goto fail; |
| 820 | } |
| 821 | |
| 822 | srelgot->size += sizeof (Elf32_External_Rela); |
| 823 | } |
| 824 | else |
| 825 | { |
| 826 | /* This is a global offset table entry for a local |
| 827 | symbol. */ |
| 828 | if (local_got_offsets == NULL) |
| 829 | { |
| 830 | size_t size; |
| 831 | unsigned int i; |
| 832 | |
| 833 | size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| 834 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| 835 | |
| 836 | if (local_got_offsets == NULL) |
| 837 | goto fail; |
| 838 | |
| 839 | elf_local_got_offsets (abfd) = local_got_offsets; |
| 840 | |
| 841 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 842 | local_got_offsets[i] = (bfd_vma) -1; |
| 843 | } |
| 844 | |
| 845 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| 846 | /* We have already allocated space in the .got. */ |
| 847 | break; |
| 848 | |
| 849 | local_got_offsets[r_symndx] = sgot->size; |
| 850 | |
| 851 | if (info->executable) |
| 852 | /* If we are generating a shared object, we need to |
| 853 | output a R_CR16_RELATIVE reloc so that the dynamic |
| 854 | linker can adjust this GOT entry. */ |
| 855 | srelgot->size += sizeof (Elf32_External_Rela); |
| 856 | } |
| 857 | |
| 858 | sgot->size += 4; |
| 859 | break; |
| 860 | |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | result = TRUE; |
| 865 | fail: |
| 866 | if (isymbuf != NULL) |
| 867 | free (isymbuf); |
| 868 | |
| 869 | return result; |
| 870 | } |
| 871 | |
| 872 | /* Perform a relocation as part of a final link. */ |
| 873 | |
| 874 | static bfd_reloc_status_type |
| 875 | cr16_elf_final_link_relocate (reloc_howto_type *howto, |
| 876 | bfd *input_bfd, |
| 877 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 878 | asection *input_section, |
| 879 | bfd_byte *contents, |
| 880 | bfd_vma offset, |
| 881 | bfd_vma Rvalue, |
| 882 | bfd_vma addend, |
| 883 | struct elf_link_hash_entry * h, |
| 884 | unsigned long symndx ATTRIBUTE_UNUSED, |
| 885 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 886 | asection *sec ATTRIBUTE_UNUSED, |
| 887 | int is_local ATTRIBUTE_UNUSED) |
| 888 | { |
| 889 | unsigned short r_type = howto->type; |
| 890 | bfd_byte *hit_data = contents + offset; |
| 891 | bfd_vma reloc_bits, check, Rvalue1; |
| 892 | |
| 893 | bfd * dynobj; |
| 894 | bfd_vma * local_got_offsets; |
| 895 | asection * sgot; |
| 896 | |
| 897 | dynobj = elf_hash_table (info)->dynobj; |
| 898 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 899 | |
| 900 | sgot = NULL; |
| 901 | |
| 902 | |
| 903 | switch (r_type) |
| 904 | { |
| 905 | case R_CR16_IMM4: |
| 906 | case R_CR16_IMM20: |
| 907 | case R_CR16_ABS20: |
| 908 | break; |
| 909 | |
| 910 | case R_CR16_IMM8: |
| 911 | case R_CR16_IMM16: |
| 912 | case R_CR16_IMM32: |
| 913 | case R_CR16_IMM32a: |
| 914 | case R_CR16_REGREL4: |
| 915 | case R_CR16_REGREL4a: |
| 916 | case R_CR16_REGREL14: |
| 917 | case R_CR16_REGREL14a: |
| 918 | case R_CR16_REGREL16: |
| 919 | case R_CR16_REGREL20: |
| 920 | case R_CR16_REGREL20a: |
| 921 | case R_CR16_GOT_REGREL20: |
| 922 | case R_CR16_GOTC_REGREL20: |
| 923 | case R_CR16_ABS24: |
| 924 | case R_CR16_DISP16: |
| 925 | case R_CR16_DISP24: |
| 926 | /* 'hit_data' is relative to the start of the instruction, not the |
| 927 | relocation offset. Advance it to account for the exact offset. */ |
| 928 | hit_data += 2; |
| 929 | break; |
| 930 | |
| 931 | case R_CR16_NONE: |
| 932 | return bfd_reloc_ok; |
| 933 | break; |
| 934 | |
| 935 | case R_CR16_DISP4: |
| 936 | if (is_local) |
| 937 | Rvalue += -1; |
| 938 | break; |
| 939 | |
| 940 | case R_CR16_DISP8: |
| 941 | case R_CR16_DISP24a: |
| 942 | if (is_local) |
| 943 | Rvalue -= -1; |
| 944 | break; |
| 945 | |
| 946 | case R_CR16_SWITCH8: |
| 947 | case R_CR16_SWITCH16: |
| 948 | case R_CR16_SWITCH32: |
| 949 | /* We only care about the addend, where the difference between |
| 950 | expressions is kept. */ |
| 951 | Rvalue = 0; |
| 952 | |
| 953 | default: |
| 954 | break; |
| 955 | } |
| 956 | |
| 957 | if (howto->pc_relative) |
| 958 | { |
| 959 | /* Subtract the address of the section containing the location. */ |
| 960 | Rvalue -= (input_section->output_section->vma |
| 961 | + input_section->output_offset); |
| 962 | /* Subtract the position of the location within the section. */ |
| 963 | Rvalue -= offset; |
| 964 | } |
| 965 | |
| 966 | /* Add in supplied addend. */ |
| 967 | Rvalue += addend; |
| 968 | |
| 969 | /* Complain if the bitfield overflows, whether it is considered |
| 970 | as signed or unsigned. */ |
| 971 | check = Rvalue >> howto->rightshift; |
| 972 | |
| 973 | /* Assumes two's complement. This expression avoids |
| 974 | overflow if howto->bitsize is the number of bits in |
| 975 | bfd_vma. */ |
| 976 | reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1; |
| 977 | |
| 978 | /* For GOT and GOTC relocs no boundary checks applied. */ |
| 979 | if (!((r_type == R_CR16_GOT_REGREL20) |
| 980 | || (r_type == R_CR16_GOTC_REGREL20))) |
| 981 | { |
| 982 | if (((bfd_vma) check & ~reloc_bits) != 0 |
| 983 | && (((bfd_vma) check & ~reloc_bits) |
| 984 | != (-(bfd_vma) 1 & ~reloc_bits))) |
| 985 | { |
| 986 | /* The above right shift is incorrect for a signed |
| 987 | value. See if turning on the upper bits fixes the |
| 988 | overflow. */ |
| 989 | if (howto->rightshift && (bfd_signed_vma) Rvalue < 0) |
| 990 | { |
| 991 | check |= ((bfd_vma) - 1 |
| 992 | & ~((bfd_vma) - 1 |
| 993 | >> howto->rightshift)); |
| 994 | |
| 995 | if (((bfd_vma) check & ~reloc_bits) |
| 996 | != (-(bfd_vma) 1 & ~reloc_bits)) |
| 997 | return bfd_reloc_overflow; |
| 998 | } |
| 999 | else |
| 1000 | return bfd_reloc_overflow; |
| 1001 | } |
| 1002 | |
| 1003 | /* Drop unwanted bits from the value we are relocating to. */ |
| 1004 | Rvalue >>= (bfd_vma) howto->rightshift; |
| 1005 | |
| 1006 | /* Apply dst_mask to select only relocatable part of the insn. */ |
| 1007 | Rvalue &= howto->dst_mask; |
| 1008 | } |
| 1009 | |
| 1010 | switch (howto->size) |
| 1011 | { |
| 1012 | case 0: |
| 1013 | if (r_type == R_CR16_DISP8) |
| 1014 | { |
| 1015 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 1016 | Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00) |
| 1017 | | (Rvalue1 & 0x00f0) | (Rvalue & 0xf)); |
| 1018 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 1019 | } |
| 1020 | else if (r_type == R_CR16_IMM4) |
| 1021 | { |
| 1022 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 1023 | Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0) |
| 1024 | | ((Rvalue1 & 0x0f00) >> 8)); |
| 1025 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 1026 | } |
| 1027 | else if (r_type == R_CR16_DISP4) |
| 1028 | { |
| 1029 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 1030 | Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4)); |
| 1031 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 1032 | } |
| 1033 | else |
| 1034 | { |
| 1035 | bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data); |
| 1036 | } |
| 1037 | break; |
| 1038 | |
| 1039 | case 1: |
| 1040 | if (r_type == R_CR16_DISP16) |
| 1041 | { |
| 1042 | Rvalue |= (bfd_get_16 (input_bfd, hit_data)); |
| 1043 | Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1)); |
| 1044 | } |
| 1045 | if (r_type == R_CR16_IMM16) |
| 1046 | { |
| 1047 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 1048 | |
| 1049 | /* Add or subtract the offset value. */ |
| 1050 | if (Rvalue1 & 0x8000) |
| 1051 | Rvalue -= (~Rvalue1 + 1) & 0xffff; |
| 1052 | else |
| 1053 | Rvalue += Rvalue1; |
| 1054 | |
| 1055 | /* Check for range. */ |
| 1056 | if ((long) Rvalue > 0xffff || (long) Rvalue < 0x0) |
| 1057 | return bfd_reloc_overflow; |
| 1058 | } |
| 1059 | |
| 1060 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 1061 | break; |
| 1062 | |
| 1063 | case 2: |
| 1064 | if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20)) |
| 1065 | { |
| 1066 | Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2) |
| 1067 | | (((bfd_get_16 (input_bfd, hit_data) & 0xf) <<16))); |
| 1068 | |
| 1069 | /* Add or subtract the offset value. */ |
| 1070 | if (Rvalue1 & 0x80000) |
| 1071 | Rvalue -= (~Rvalue1 + 1) & 0xfffff; |
| 1072 | else |
| 1073 | Rvalue += Rvalue1; |
| 1074 | |
| 1075 | /* Check for range. */ |
| 1076 | if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0) |
| 1077 | return bfd_reloc_overflow; |
| 1078 | |
| 1079 | bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0) |
| 1080 | | ((Rvalue >> 16) & 0xf)), hit_data); |
| 1081 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
| 1082 | } |
| 1083 | else if (r_type == R_CR16_GOT_REGREL20) |
| 1084 | { |
| 1085 | asection * sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1086 | |
| 1087 | if (h != NULL) |
| 1088 | { |
| 1089 | bfd_vma off; |
| 1090 | |
| 1091 | off = h->got.offset; |
| 1092 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1093 | |
| 1094 | if (! elf_hash_table (info)->dynamic_sections_created |
| 1095 | || SYMBOL_REFERENCES_LOCAL (info, h)) |
| 1096 | /* This is actually a static link, or it is a |
| 1097 | -Bsymbolic link and the symbol is defined |
| 1098 | locally, or the symbol was forced to be local |
| 1099 | because of a version file. We must initialize |
| 1100 | this entry in the global offset table. |
| 1101 | When doing a dynamic link, we create a .rela.got |
| 1102 | relocation entry to initialize the value. This |
| 1103 | is done in the finish_dynamic_symbol routine. */ |
| 1104 | bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); |
| 1105 | |
| 1106 | Rvalue = sgot->output_offset + off; |
| 1107 | } |
| 1108 | else |
| 1109 | { |
| 1110 | bfd_vma off; |
| 1111 | |
| 1112 | off = elf_local_got_offsets (input_bfd)[symndx]; |
| 1113 | bfd_put_32 (output_bfd,Rvalue, sgot->contents + off); |
| 1114 | |
| 1115 | Rvalue = sgot->output_offset + off; |
| 1116 | } |
| 1117 | |
| 1118 | Rvalue += addend; |
| 1119 | |
| 1120 | /* REVISIT: if ((long) Rvalue > 0xffffff || |
| 1121 | (long) Rvalue < -0x800000). */ |
| 1122 | if ((long) Rvalue > 0xffffff || (long) Rvalue < 0) |
| 1123 | return bfd_reloc_overflow; |
| 1124 | |
| 1125 | |
| 1126 | bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) |
| 1127 | | (((Rvalue >> 16) & 0xf) << 8), hit_data); |
| 1128 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
| 1129 | |
| 1130 | } |
| 1131 | else if (r_type == R_CR16_GOTC_REGREL20) |
| 1132 | { |
| 1133 | asection * sgot; |
| 1134 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1135 | |
| 1136 | if (h != NULL) |
| 1137 | { |
| 1138 | bfd_vma off; |
| 1139 | |
| 1140 | off = h->got.offset; |
| 1141 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1142 | |
| 1143 | Rvalue >>=1; /* For code symbols. */ |
| 1144 | |
| 1145 | if (! elf_hash_table (info)->dynamic_sections_created |
| 1146 | || SYMBOL_REFERENCES_LOCAL (info, h)) |
| 1147 | /* This is actually a static link, or it is a |
| 1148 | -Bsymbolic link and the symbol is defined |
| 1149 | locally, or the symbol was forced to be local |
| 1150 | because of a version file. We must initialize |
| 1151 | this entry in the global offset table. |
| 1152 | When doing a dynamic link, we create a .rela.got |
| 1153 | relocation entry to initialize the value. This |
| 1154 | is done in the finish_dynamic_symbol routine. */ |
| 1155 | bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); |
| 1156 | |
| 1157 | Rvalue = sgot->output_offset + off; |
| 1158 | } |
| 1159 | else |
| 1160 | { |
| 1161 | bfd_vma off; |
| 1162 | |
| 1163 | off = elf_local_got_offsets (input_bfd)[symndx]; |
| 1164 | Rvalue >>= 1; |
| 1165 | bfd_put_32 (output_bfd,Rvalue, sgot->contents + off); |
| 1166 | Rvalue = sgot->output_offset + off; |
| 1167 | } |
| 1168 | |
| 1169 | Rvalue += addend; |
| 1170 | |
| 1171 | /* Check if any value in DISP. */ |
| 1172 | Rvalue1 =((bfd_get_32 (input_bfd, hit_data) >>16) |
| 1173 | | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)); |
| 1174 | |
| 1175 | /* Add or subtract the offset value. */ |
| 1176 | if (Rvalue1 & 0x80000) |
| 1177 | Rvalue -= (~Rvalue1 + 1) & 0xfffff; |
| 1178 | else |
| 1179 | Rvalue += Rvalue1; |
| 1180 | |
| 1181 | /* Check for range. */ |
| 1182 | /* REVISIT: if ((long) Rvalue > 0xffffff |
| 1183 | || (long) Rvalue < -0x800000). */ |
| 1184 | if ((long) Rvalue > 0xffffff || (long) Rvalue < 0) |
| 1185 | return bfd_reloc_overflow; |
| 1186 | |
| 1187 | bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) |
| 1188 | | (((Rvalue >> 16) & 0xf) << 8), hit_data); |
| 1189 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
| 1190 | } |
| 1191 | else |
| 1192 | { |
| 1193 | if (r_type == R_CR16_ABS24) |
| 1194 | { |
| 1195 | Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16) |
| 1196 | | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16) |
| 1197 | | (((bfd_get_32 (input_bfd, hit_data) & 0xf) <<20))); |
| 1198 | |
| 1199 | /* Add or subtract the offset value. */ |
| 1200 | if (Rvalue1 & 0x800000) |
| 1201 | Rvalue -= (~Rvalue1 + 1) & 0xffffff; |
| 1202 | else |
| 1203 | Rvalue += Rvalue1; |
| 1204 | |
| 1205 | /* Check for Range. */ |
| 1206 | if ((long) Rvalue > 0xffffff || (long) Rvalue < 0x0) |
| 1207 | return bfd_reloc_overflow; |
| 1208 | |
| 1209 | Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8) |
| 1210 | | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0)) |
| 1211 | | ((Rvalue & 0xffff) << 16)); |
| 1212 | } |
| 1213 | else if (r_type == R_CR16_DISP24) |
| 1214 | { |
| 1215 | Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8) |
| 1216 | | (bfd_get_16 (input_bfd, hit_data))) |
| 1217 | | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16)); |
| 1218 | } |
| 1219 | else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a)) |
| 1220 | { |
| 1221 | Rvalue1 =((((bfd_get_32 (input_bfd, hit_data)) >> 16) &0xffff) |
| 1222 | | (((bfd_get_32 (input_bfd, hit_data)) &0xffff)) << 16); |
| 1223 | |
| 1224 | /* Add or subtract the offset value. */ |
| 1225 | if (Rvalue1 & 0x80000000) |
| 1226 | Rvalue -= (~Rvalue1 + 1) & 0xffffffff; |
| 1227 | else |
| 1228 | Rvalue += Rvalue1; |
| 1229 | |
| 1230 | /* Check for range. */ |
| 1231 | if (Rvalue > 0xffffffff || (long) Rvalue < 0x0) |
| 1232 | return bfd_reloc_overflow; |
| 1233 | |
| 1234 | Rvalue = (((Rvalue >> 16)& 0xffff) | (Rvalue & 0xffff) << 16); |
| 1235 | } |
| 1236 | else if (r_type == R_CR16_DISP24a) |
| 1237 | { |
| 1238 | Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23))); |
| 1239 | Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16) |
| 1240 | | (bfd_get_32 (input_bfd, hit_data)); |
| 1241 | } |
| 1242 | else if ((r_type == R_CR16_REGREL20) |
| 1243 | || (r_type == R_CR16_REGREL20a)) |
| 1244 | { |
| 1245 | Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16) |
| 1246 | | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)); |
| 1247 | /* Add or subtract the offset value. */ |
| 1248 | if (Rvalue1 & 0x80000) |
| 1249 | Rvalue -= (~Rvalue1 + 1) & 0xfffff; |
| 1250 | else |
| 1251 | Rvalue += Rvalue1; |
| 1252 | |
| 1253 | /* Check for range. */ |
| 1254 | if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0) |
| 1255 | return bfd_reloc_overflow; |
| 1256 | |
| 1257 | Rvalue = (((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8) |
| 1258 | | ((Rvalue & 0xffff) << 16))) |
| 1259 | | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff)); |
| 1260 | |
| 1261 | } |
| 1262 | else if (r_type == R_CR16_NUM32) |
| 1263 | { |
| 1264 | Rvalue1 = (bfd_get_32 (input_bfd, hit_data)); |
| 1265 | |
| 1266 | /* Add or subtract the offset value */ |
| 1267 | if (Rvalue1 & 0x80000000) |
| 1268 | Rvalue -= (~Rvalue1 + 1) & 0xffffffff; |
| 1269 | else |
| 1270 | Rvalue += Rvalue1; |
| 1271 | |
| 1272 | /* Check for Ranga */ |
| 1273 | if (Rvalue > 0xffffffff) |
| 1274 | return bfd_reloc_overflow; |
| 1275 | } |
| 1276 | |
| 1277 | bfd_put_32 (input_bfd, Rvalue, hit_data); |
| 1278 | } |
| 1279 | break; |
| 1280 | |
| 1281 | default: |
| 1282 | return bfd_reloc_notsupported; |
| 1283 | } |
| 1284 | |
| 1285 | return bfd_reloc_ok; |
| 1286 | } |
| 1287 | |
| 1288 | /* Delete some bytes from a section while relaxing. */ |
| 1289 | |
| 1290 | static bfd_boolean |
| 1291 | elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd, |
| 1292 | asection *sec, bfd_vma addr, int count) |
| 1293 | { |
| 1294 | Elf_Internal_Shdr *symtab_hdr; |
| 1295 | unsigned int sec_shndx; |
| 1296 | bfd_byte *contents; |
| 1297 | Elf_Internal_Rela *irel, *irelend; |
| 1298 | Elf_Internal_Rela *irelalign; |
| 1299 | bfd_vma toaddr; |
| 1300 | Elf_Internal_Sym *isym; |
| 1301 | Elf_Internal_Sym *isymend; |
| 1302 | struct elf_link_hash_entry **sym_hashes; |
| 1303 | struct elf_link_hash_entry **end_hashes; |
| 1304 | struct elf_link_hash_entry **start_hashes; |
| 1305 | unsigned int symcount; |
| 1306 | |
| 1307 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1308 | |
| 1309 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1310 | |
| 1311 | /* The deletion must stop at the next ALIGN reloc for an aligment |
| 1312 | power larger than the number of bytes we are deleting. */ |
| 1313 | irelalign = NULL; |
| 1314 | toaddr = sec->size; |
| 1315 | |
| 1316 | irel = elf_section_data (sec)->relocs; |
| 1317 | irelend = irel + sec->reloc_count; |
| 1318 | |
| 1319 | /* Actually delete the bytes. */ |
| 1320 | memmove (contents + addr, contents + addr + count, |
| 1321 | (size_t) (toaddr - addr - count)); |
| 1322 | sec->size -= count; |
| 1323 | |
| 1324 | /* Adjust all the relocs. */ |
| 1325 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 1326 | /* Get the new reloc address. */ |
| 1327 | if ((irel->r_offset > addr && irel->r_offset < toaddr)) |
| 1328 | irel->r_offset -= count; |
| 1329 | |
| 1330 | /* Adjust the local symbols defined in this section. */ |
| 1331 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1332 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1333 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 1334 | { |
| 1335 | if (isym->st_shndx == sec_shndx |
| 1336 | && isym->st_value > addr |
| 1337 | && isym->st_value < toaddr) |
| 1338 | { |
| 1339 | /* Adjust the addend of SWITCH relocations in this section, |
| 1340 | which reference this local symbol. */ |
| 1341 | #if 0 |
| 1342 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 1343 | { |
| 1344 | unsigned long r_symndx; |
| 1345 | Elf_Internal_Sym *rsym; |
| 1346 | bfd_vma addsym, subsym; |
| 1347 | |
| 1348 | /* Skip if not a SWITCH relocation. */ |
| 1349 | if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8 |
| 1350 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16 |
| 1351 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32) |
| 1352 | continue; |
| 1353 | |
| 1354 | r_symndx = ELF32_R_SYM (irel->r_info); |
| 1355 | rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx; |
| 1356 | |
| 1357 | /* Skip if not the local adjusted symbol. */ |
| 1358 | if (rsym != isym) |
| 1359 | continue; |
| 1360 | |
| 1361 | addsym = isym->st_value; |
| 1362 | subsym = addsym - irel->r_addend; |
| 1363 | |
| 1364 | /* Fix the addend only when -->> (addsym > addr >= subsym). */ |
| 1365 | if (subsym <= addr) |
| 1366 | irel->r_addend -= count; |
| 1367 | else |
| 1368 | continue; |
| 1369 | } |
| 1370 | #endif |
| 1371 | |
| 1372 | isym->st_value -= count; |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | /* Now adjust the global symbols defined in this section. */ |
| 1377 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1378 | - symtab_hdr->sh_info); |
| 1379 | sym_hashes = start_hashes = elf_sym_hashes (abfd); |
| 1380 | end_hashes = sym_hashes + symcount; |
| 1381 | |
| 1382 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1383 | { |
| 1384 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1385 | |
| 1386 | /* The '--wrap SYMBOL' option is causing a pain when the object file, |
| 1387 | containing the definition of __wrap_SYMBOL, includes a direct |
| 1388 | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference |
| 1389 | the same symbol (which is __wrap_SYMBOL), but still exist as two |
| 1390 | different symbols in 'sym_hashes', we don't want to adjust |
| 1391 | the global symbol __wrap_SYMBOL twice. |
| 1392 | This check is only relevant when symbols are being wrapped. */ |
| 1393 | if (link_info->wrap_hash != NULL) |
| 1394 | { |
| 1395 | struct elf_link_hash_entry **cur_sym_hashes; |
| 1396 | |
| 1397 | /* Loop only over the symbols whom been already checked. */ |
| 1398 | for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; |
| 1399 | cur_sym_hashes++) |
| 1400 | /* If the current symbol is identical to 'sym_hash', that means |
| 1401 | the symbol was already adjusted (or at least checked). */ |
| 1402 | if (*cur_sym_hashes == sym_hash) |
| 1403 | break; |
| 1404 | |
| 1405 | /* Don't adjust the symbol again. */ |
| 1406 | if (cur_sym_hashes < sym_hashes) |
| 1407 | continue; |
| 1408 | } |
| 1409 | |
| 1410 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1411 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1412 | && sym_hash->root.u.def.section == sec |
| 1413 | && sym_hash->root.u.def.value > addr |
| 1414 | && sym_hash->root.u.def.value < toaddr) |
| 1415 | sym_hash->root.u.def.value -= count; |
| 1416 | } |
| 1417 | |
| 1418 | return TRUE; |
| 1419 | } |
| 1420 | |
| 1421 | /* Relocate a CR16 ELF section. */ |
| 1422 | |
| 1423 | static bfd_boolean |
| 1424 | elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
| 1425 | bfd *input_bfd, asection *input_section, |
| 1426 | bfd_byte *contents, Elf_Internal_Rela *relocs, |
| 1427 | Elf_Internal_Sym *local_syms, |
| 1428 | asection **local_sections) |
| 1429 | { |
| 1430 | Elf_Internal_Shdr *symtab_hdr; |
| 1431 | struct elf_link_hash_entry **sym_hashes; |
| 1432 | Elf_Internal_Rela *rel, *relend; |
| 1433 | |
| 1434 | if (info->relocatable) |
| 1435 | return TRUE; |
| 1436 | |
| 1437 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1438 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1439 | |
| 1440 | rel = relocs; |
| 1441 | relend = relocs + input_section->reloc_count; |
| 1442 | for (; rel < relend; rel++) |
| 1443 | { |
| 1444 | int r_type; |
| 1445 | reloc_howto_type *howto; |
| 1446 | unsigned long r_symndx; |
| 1447 | Elf_Internal_Sym *sym; |
| 1448 | asection *sec; |
| 1449 | struct elf_link_hash_entry *h; |
| 1450 | bfd_vma relocation; |
| 1451 | bfd_reloc_status_type r; |
| 1452 | |
| 1453 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1454 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1455 | howto = cr16_elf_howto_table + (r_type); |
| 1456 | |
| 1457 | h = NULL; |
| 1458 | sym = NULL; |
| 1459 | sec = NULL; |
| 1460 | if (r_symndx < symtab_hdr->sh_info) |
| 1461 | { |
| 1462 | sym = local_syms + r_symndx; |
| 1463 | sec = local_sections[r_symndx]; |
| 1464 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1465 | } |
| 1466 | else |
| 1467 | { |
| 1468 | bfd_boolean unresolved_reloc, warned; |
| 1469 | |
| 1470 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1471 | r_symndx, symtab_hdr, sym_hashes, |
| 1472 | h, sec, relocation, |
| 1473 | unresolved_reloc, warned); |
| 1474 | } |
| 1475 | |
| 1476 | if (sec != NULL && elf_discarded_section (sec)) |
| 1477 | { |
| 1478 | /* For relocs against symbols from removed linkonce sections, |
| 1479 | or sections discarded by a linker script, we just want the |
| 1480 | section contents zeroed. Avoid any special processing. */ |
| 1481 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 1482 | rel->r_info = 0; |
| 1483 | rel->r_addend = 0; |
| 1484 | continue; |
| 1485 | } |
| 1486 | |
| 1487 | if (info->relocatable) |
| 1488 | continue; |
| 1489 | |
| 1490 | r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1491 | input_section, |
| 1492 | contents, rel->r_offset, |
| 1493 | relocation, rel->r_addend, |
| 1494 | (struct elf_link_hash_entry *) h, |
| 1495 | r_symndx, |
| 1496 | info, sec, h == NULL); |
| 1497 | |
| 1498 | if (r != bfd_reloc_ok) |
| 1499 | { |
| 1500 | const char *name; |
| 1501 | const char *msg = NULL; |
| 1502 | |
| 1503 | if (h != NULL) |
| 1504 | name = h->root.root.string; |
| 1505 | else |
| 1506 | { |
| 1507 | name = (bfd_elf_string_from_elf_section |
| 1508 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1509 | if (name == NULL || *name == '\0') |
| 1510 | name = bfd_section_name (input_bfd, sec); |
| 1511 | } |
| 1512 | |
| 1513 | switch (r) |
| 1514 | { |
| 1515 | case bfd_reloc_overflow: |
| 1516 | if (!((*info->callbacks->reloc_overflow) |
| 1517 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1518 | (bfd_vma) 0, input_bfd, input_section, |
| 1519 | rel->r_offset))) |
| 1520 | return FALSE; |
| 1521 | break; |
| 1522 | |
| 1523 | case bfd_reloc_undefined: |
| 1524 | if (!((*info->callbacks->undefined_symbol) |
| 1525 | (info, name, input_bfd, input_section, |
| 1526 | rel->r_offset, TRUE))) |
| 1527 | return FALSE; |
| 1528 | break; |
| 1529 | |
| 1530 | case bfd_reloc_outofrange: |
| 1531 | msg = _("internal error: out of range error"); |
| 1532 | goto common_error; |
| 1533 | |
| 1534 | case bfd_reloc_notsupported: |
| 1535 | msg = _("internal error: unsupported relocation error"); |
| 1536 | goto common_error; |
| 1537 | |
| 1538 | case bfd_reloc_dangerous: |
| 1539 | msg = _("internal error: dangerous error"); |
| 1540 | goto common_error; |
| 1541 | |
| 1542 | default: |
| 1543 | msg = _("internal error: unknown error"); |
| 1544 | /* Fall through. */ |
| 1545 | |
| 1546 | common_error: |
| 1547 | if (!((*info->callbacks->warning) |
| 1548 | (info, msg, name, input_bfd, input_section, |
| 1549 | rel->r_offset))) |
| 1550 | return FALSE; |
| 1551 | break; |
| 1552 | } |
| 1553 | } |
| 1554 | } |
| 1555 | |
| 1556 | return TRUE; |
| 1557 | } |
| 1558 | |
| 1559 | /* This is a version of bfd_generic_get_relocated_section_contents |
| 1560 | which uses elf32_cr16_relocate_section. */ |
| 1561 | |
| 1562 | static bfd_byte * |
| 1563 | elf32_cr16_get_relocated_section_contents (bfd *output_bfd, |
| 1564 | struct bfd_link_info *link_info, |
| 1565 | struct bfd_link_order *link_order, |
| 1566 | bfd_byte *data, |
| 1567 | bfd_boolean relocatable, |
| 1568 | asymbol **symbols) |
| 1569 | { |
| 1570 | Elf_Internal_Shdr *symtab_hdr; |
| 1571 | asection *input_section = link_order->u.indirect.section; |
| 1572 | bfd *input_bfd = input_section->owner; |
| 1573 | asection **sections = NULL; |
| 1574 | Elf_Internal_Rela *internal_relocs = NULL; |
| 1575 | Elf_Internal_Sym *isymbuf = NULL; |
| 1576 | |
| 1577 | /* We only need to handle the case of relaxing, or of having a |
| 1578 | particular set of section contents, specially. */ |
| 1579 | if (relocatable |
| 1580 | || elf_section_data (input_section)->this_hdr.contents == NULL) |
| 1581 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| 1582 | link_order, data, |
| 1583 | relocatable, |
| 1584 | symbols); |
| 1585 | |
| 1586 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1587 | |
| 1588 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| 1589 | (size_t) input_section->size); |
| 1590 | |
| 1591 | if ((input_section->flags & SEC_RELOC) != 0 |
| 1592 | && input_section->reloc_count > 0) |
| 1593 | { |
| 1594 | Elf_Internal_Sym *isym; |
| 1595 | Elf_Internal_Sym *isymend; |
| 1596 | asection **secpp; |
| 1597 | bfd_size_type amt; |
| 1598 | |
| 1599 | internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section, |
| 1600 | NULL, NULL, FALSE); |
| 1601 | if (internal_relocs == NULL) |
| 1602 | goto error_return; |
| 1603 | |
| 1604 | if (symtab_hdr->sh_info != 0) |
| 1605 | { |
| 1606 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1607 | if (isymbuf == NULL) |
| 1608 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 1609 | symtab_hdr->sh_info, 0, |
| 1610 | NULL, NULL, NULL); |
| 1611 | if (isymbuf == NULL) |
| 1612 | goto error_return; |
| 1613 | } |
| 1614 | |
| 1615 | amt = symtab_hdr->sh_info; |
| 1616 | amt *= sizeof (asection *); |
| 1617 | sections = bfd_malloc (amt); |
| 1618 | if (sections == NULL && amt != 0) |
| 1619 | goto error_return; |
| 1620 | |
| 1621 | isymend = isymbuf + symtab_hdr->sh_info; |
| 1622 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) |
| 1623 | { |
| 1624 | asection *isec; |
| 1625 | |
| 1626 | if (isym->st_shndx == SHN_UNDEF) |
| 1627 | isec = bfd_und_section_ptr; |
| 1628 | else if (isym->st_shndx == SHN_ABS) |
| 1629 | isec = bfd_abs_section_ptr; |
| 1630 | else if (isym->st_shndx == SHN_COMMON) |
| 1631 | isec = bfd_com_section_ptr; |
| 1632 | else |
| 1633 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| 1634 | |
| 1635 | *secpp = isec; |
| 1636 | } |
| 1637 | |
| 1638 | if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd, |
| 1639 | input_section, data, internal_relocs, |
| 1640 | isymbuf, sections)) |
| 1641 | goto error_return; |
| 1642 | |
| 1643 | if (sections != NULL) |
| 1644 | free (sections); |
| 1645 | if (isymbuf != NULL |
| 1646 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1647 | free (isymbuf); |
| 1648 | if (elf_section_data (input_section)->relocs != internal_relocs) |
| 1649 | free (internal_relocs); |
| 1650 | } |
| 1651 | |
| 1652 | return data; |
| 1653 | |
| 1654 | error_return: |
| 1655 | if (sections != NULL) |
| 1656 | free (sections); |
| 1657 | if (isymbuf != NULL |
| 1658 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1659 | free (isymbuf); |
| 1660 | if (internal_relocs != NULL |
| 1661 | && elf_section_data (input_section)->relocs != internal_relocs) |
| 1662 | free (internal_relocs); |
| 1663 | return NULL; |
| 1664 | } |
| 1665 | |
| 1666 | /* Assorted hash table functions. */ |
| 1667 | |
| 1668 | /* Initialize an entry in the link hash table. */ |
| 1669 | |
| 1670 | /* Create an entry in an CR16 ELF linker hash table. */ |
| 1671 | |
| 1672 | static struct bfd_hash_entry * |
| 1673 | elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 1674 | struct bfd_hash_table *table, |
| 1675 | const char *string) |
| 1676 | { |
| 1677 | struct elf32_cr16_link_hash_entry *ret = |
| 1678 | (struct elf32_cr16_link_hash_entry *) entry; |
| 1679 | |
| 1680 | /* Allocate the structure if it has not already been allocated by a |
| 1681 | subclass. */ |
| 1682 | if (ret == (struct elf32_cr16_link_hash_entry *) NULL) |
| 1683 | ret = ((struct elf32_cr16_link_hash_entry *) |
| 1684 | bfd_hash_allocate (table, |
| 1685 | sizeof (struct elf32_cr16_link_hash_entry))); |
| 1686 | if (ret == (struct elf32_cr16_link_hash_entry *) NULL) |
| 1687 | return (struct bfd_hash_entry *) ret; |
| 1688 | |
| 1689 | /* Call the allocation method of the superclass. */ |
| 1690 | ret = ((struct elf32_cr16_link_hash_entry *) |
| 1691 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1692 | table, string)); |
| 1693 | if (ret != (struct elf32_cr16_link_hash_entry *) NULL) |
| 1694 | { |
| 1695 | ret->direct_calls = 0; |
| 1696 | ret->stack_size = 0; |
| 1697 | ret->movm_args = 0; |
| 1698 | ret->movm_stack_size = 0; |
| 1699 | ret->flags = 0; |
| 1700 | ret->value = 0; |
| 1701 | } |
| 1702 | |
| 1703 | return (struct bfd_hash_entry *) ret; |
| 1704 | } |
| 1705 | |
| 1706 | /* Create an cr16 ELF linker hash table. */ |
| 1707 | |
| 1708 | static struct bfd_link_hash_table * |
| 1709 | elf32_cr16_link_hash_table_create (bfd *abfd) |
| 1710 | { |
| 1711 | struct elf32_cr16_link_hash_table *ret; |
| 1712 | bfd_size_type amt = sizeof (struct elf32_cr16_link_hash_table); |
| 1713 | |
| 1714 | ret = (struct elf32_cr16_link_hash_table *) bfd_malloc (amt); |
| 1715 | if (ret == (struct elf32_cr16_link_hash_table *) NULL) |
| 1716 | return NULL; |
| 1717 | |
| 1718 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 1719 | elf32_cr16_link_hash_newfunc, |
| 1720 | sizeof (struct elf32_cr16_link_hash_entry))) |
| 1721 | { |
| 1722 | free (ret); |
| 1723 | return NULL; |
| 1724 | } |
| 1725 | |
| 1726 | ret->flags = 0; |
| 1727 | amt = sizeof (struct elf_link_hash_table); |
| 1728 | ret->static_hash_table |
| 1729 | = (struct elf32_cr16_link_hash_table *) bfd_malloc (amt); |
| 1730 | if (ret->static_hash_table == NULL) |
| 1731 | { |
| 1732 | free (ret); |
| 1733 | return NULL; |
| 1734 | } |
| 1735 | |
| 1736 | if (!_bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd, |
| 1737 | elf32_cr16_link_hash_newfunc, |
| 1738 | sizeof (struct elf32_cr16_link_hash_entry))) |
| 1739 | { |
| 1740 | free (ret->static_hash_table); |
| 1741 | free (ret); |
| 1742 | return NULL; |
| 1743 | } |
| 1744 | return &ret->root.root; |
| 1745 | } |
| 1746 | |
| 1747 | /* Free an cr16 ELF linker hash table. */ |
| 1748 | |
| 1749 | static void |
| 1750 | elf32_cr16_link_hash_table_free (struct bfd_link_hash_table *hash) |
| 1751 | { |
| 1752 | struct elf32_cr16_link_hash_table *ret |
| 1753 | = (struct elf32_cr16_link_hash_table *) hash; |
| 1754 | |
| 1755 | _bfd_generic_link_hash_table_free |
| 1756 | ((struct bfd_link_hash_table *) ret->static_hash_table); |
| 1757 | _bfd_generic_link_hash_table_free |
| 1758 | ((struct bfd_link_hash_table *) ret); |
| 1759 | } |
| 1760 | |
| 1761 | static unsigned long |
| 1762 | elf_cr16_mach (flagword flags) |
| 1763 | { |
| 1764 | switch (flags) |
| 1765 | { |
| 1766 | case EM_CR16: |
| 1767 | default: |
| 1768 | return bfd_mach_cr16; |
| 1769 | } |
| 1770 | } |
| 1771 | |
| 1772 | /* The final processing done just before writing out a CR16 ELF object |
| 1773 | file. This gets the CR16 architecture right based on the machine |
| 1774 | number. */ |
| 1775 | |
| 1776 | static void |
| 1777 | _bfd_cr16_elf_final_write_processing (bfd *abfd, |
| 1778 | bfd_boolean linker ATTRIBUTE_UNUSED) |
| 1779 | { |
| 1780 | unsigned long val; |
| 1781 | switch (bfd_get_mach (abfd)) |
| 1782 | { |
| 1783 | default: |
| 1784 | case bfd_mach_cr16: |
| 1785 | val = EM_CR16; |
| 1786 | break; |
| 1787 | } |
| 1788 | |
| 1789 | |
| 1790 | elf_elfheader (abfd)->e_flags |= val; |
| 1791 | } |
| 1792 | |
| 1793 | |
| 1794 | static bfd_boolean |
| 1795 | _bfd_cr16_elf_object_p (bfd *abfd) |
| 1796 | { |
| 1797 | bfd_default_set_arch_mach (abfd, bfd_arch_cr16, |
| 1798 | elf_cr16_mach (elf_elfheader (abfd)->e_flags)); |
| 1799 | return TRUE; |
| 1800 | } |
| 1801 | |
| 1802 | /* Merge backend specific data from an object file to the output |
| 1803 | object file when linking. */ |
| 1804 | |
| 1805 | static bfd_boolean |
| 1806 | _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 1807 | { |
| 1808 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1809 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1810 | return TRUE; |
| 1811 | |
| 1812 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 1813 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) |
| 1814 | { |
| 1815 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 1816 | bfd_get_mach (ibfd))) |
| 1817 | return FALSE; |
| 1818 | } |
| 1819 | |
| 1820 | return TRUE; |
| 1821 | } |
| 1822 | |
| 1823 | |
| 1824 | /* This function handles relaxing for the CR16. |
| 1825 | |
| 1826 | There's quite a few relaxing opportunites available on the CR16: |
| 1827 | |
| 1828 | * bcond:24 -> bcond:16 1 byte |
| 1829 | * bcond:16 -> bcond:8 1 byte |
| 1830 | * arithmetic imm32 -> arithmetic imm20 12 bits |
| 1831 | * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits |
| 1832 | |
| 1833 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
| 1834 | |
| 1835 | static bfd_boolean |
| 1836 | elf32_cr16_relax_section (bfd *abfd, asection *sec, |
| 1837 | struct bfd_link_info *link_info, bfd_boolean *again) |
| 1838 | { |
| 1839 | Elf_Internal_Shdr *symtab_hdr; |
| 1840 | Elf_Internal_Rela *internal_relocs; |
| 1841 | Elf_Internal_Rela *irel, *irelend; |
| 1842 | bfd_byte *contents = NULL; |
| 1843 | Elf_Internal_Sym *isymbuf = NULL; |
| 1844 | |
| 1845 | /* Assume nothing changes. */ |
| 1846 | *again = FALSE; |
| 1847 | |
| 1848 | /* We don't have to do anything for a relocatable link, if |
| 1849 | this section does not have relocs, or if this is not a |
| 1850 | code section. */ |
| 1851 | if (link_info->relocatable |
| 1852 | || (sec->flags & SEC_RELOC) == 0 |
| 1853 | || sec->reloc_count == 0 |
| 1854 | || (sec->flags & SEC_CODE) == 0) |
| 1855 | return TRUE; |
| 1856 | |
| 1857 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1858 | |
| 1859 | /* Get a copy of the native relocations. */ |
| 1860 | internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
| 1861 | link_info->keep_memory); |
| 1862 | if (internal_relocs == NULL) |
| 1863 | goto error_return; |
| 1864 | |
| 1865 | /* Walk through them looking for relaxing opportunities. */ |
| 1866 | irelend = internal_relocs + sec->reloc_count; |
| 1867 | for (irel = internal_relocs; irel < irelend; irel++) |
| 1868 | { |
| 1869 | bfd_vma symval; |
| 1870 | |
| 1871 | /* If this isn't something that can be relaxed, then ignore |
| 1872 | this reloc. */ |
| 1873 | if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16 |
| 1874 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24 |
| 1875 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32 |
| 1876 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20 |
| 1877 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16) |
| 1878 | continue; |
| 1879 | |
| 1880 | /* Get the section contents if we haven't done so already. */ |
| 1881 | if (contents == NULL) |
| 1882 | { |
| 1883 | /* Get cached copy if it exists. */ |
| 1884 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 1885 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1886 | /* Go get them off disk. */ |
| 1887 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 1888 | goto error_return; |
| 1889 | } |
| 1890 | |
| 1891 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 1892 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 1893 | { |
| 1894 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1895 | if (isymbuf == NULL) |
| 1896 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 1897 | symtab_hdr->sh_info, 0, |
| 1898 | NULL, NULL, NULL); |
| 1899 | if (isymbuf == NULL) |
| 1900 | goto error_return; |
| 1901 | } |
| 1902 | |
| 1903 | /* Get the value of the symbol referred to by the reloc. */ |
| 1904 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1905 | { |
| 1906 | /* A local symbol. */ |
| 1907 | Elf_Internal_Sym *isym; |
| 1908 | asection *sym_sec; |
| 1909 | |
| 1910 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 1911 | if (isym->st_shndx == SHN_UNDEF) |
| 1912 | sym_sec = bfd_und_section_ptr; |
| 1913 | else if (isym->st_shndx == SHN_ABS) |
| 1914 | sym_sec = bfd_abs_section_ptr; |
| 1915 | else if (isym->st_shndx == SHN_COMMON) |
| 1916 | sym_sec = bfd_com_section_ptr; |
| 1917 | else |
| 1918 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1919 | symval = (isym->st_value |
| 1920 | + sym_sec->output_section->vma |
| 1921 | + sym_sec->output_offset); |
| 1922 | } |
| 1923 | else |
| 1924 | { |
| 1925 | unsigned long indx; |
| 1926 | struct elf_link_hash_entry *h; |
| 1927 | |
| 1928 | /* An external symbol. */ |
| 1929 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 1930 | h = elf_sym_hashes (abfd)[indx]; |
| 1931 | BFD_ASSERT (h != NULL); |
| 1932 | |
| 1933 | if (h->root.type != bfd_link_hash_defined |
| 1934 | && h->root.type != bfd_link_hash_defweak) |
| 1935 | /* This appears to be a reference to an undefined |
| 1936 | symbol. Just ignore it--it will be caught by the |
| 1937 | regular reloc processing. */ |
| 1938 | continue; |
| 1939 | |
| 1940 | symval = (h->root.u.def.value |
| 1941 | + h->root.u.def.section->output_section->vma |
| 1942 | + h->root.u.def.section->output_offset); |
| 1943 | } |
| 1944 | |
| 1945 | /* For simplicity of coding, we are going to modify the section |
| 1946 | contents, the section relocs, and the BFD symbol table. We |
| 1947 | must tell the rest of the code not to free up this |
| 1948 | information. It would be possible to instead create a table |
| 1949 | of changes which have to be made, as is done in coff-mips.c; |
| 1950 | that would be more work, but would require less memory when |
| 1951 | the linker is run. */ |
| 1952 | |
| 1953 | /* Try to turn a 24 branch/call into a 16bit relative |
| 1954 | branch/call. */ |
| 1955 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24) |
| 1956 | { |
| 1957 | bfd_vma value = symval; |
| 1958 | |
| 1959 | /* Deal with pc-relative gunk. */ |
| 1960 | value -= (sec->output_section->vma + sec->output_offset); |
| 1961 | value -= irel->r_offset; |
| 1962 | value += irel->r_addend; |
| 1963 | |
| 1964 | /* See if the value will fit in 16 bits, note the high value is |
| 1965 | 0xfffe + 2 as the target will be two bytes closer if we are |
| 1966 | able to relax. */ |
| 1967 | if ((long) value < 0x10000 && (long) value > -0x10002) |
| 1968 | { |
| 1969 | unsigned int code; |
| 1970 | |
| 1971 | /* Get the opcode. */ |
| 1972 | code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset); |
| 1973 | |
| 1974 | /* Verify it's a 'bcond' and fix the opcode. */ |
| 1975 | if ((code & 0xffff) == 0x0010) |
| 1976 | bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset); |
| 1977 | else |
| 1978 | continue; |
| 1979 | |
| 1980 | /* Note that we've changed the relocs, section contents, etc. */ |
| 1981 | elf_section_data (sec)->relocs = internal_relocs; |
| 1982 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1983 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1984 | |
| 1985 | /* Fix the relocation's type. */ |
| 1986 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1987 | R_CR16_DISP16); |
| 1988 | |
| 1989 | /* Delete two bytes of data. */ |
| 1990 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 1991 | irel->r_offset + 2, 2)) |
| 1992 | goto error_return; |
| 1993 | |
| 1994 | /* That will change things, so, we should relax again. |
| 1995 | Note that this is not required, and it may be slow. */ |
| 1996 | *again = TRUE; |
| 1997 | } |
| 1998 | } |
| 1999 | |
| 2000 | /* Try to turn a 16bit pc-relative branch into an |
| 2001 | 8bit pc-relative branch. */ |
| 2002 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16) |
| 2003 | { |
| 2004 | bfd_vma value = symval; |
| 2005 | |
| 2006 | /* Deal with pc-relative gunk. */ |
| 2007 | value -= (sec->output_section->vma + sec->output_offset); |
| 2008 | value -= irel->r_offset; |
| 2009 | value += irel->r_addend; |
| 2010 | |
| 2011 | /* See if the value will fit in 8 bits, note the high value is |
| 2012 | 0xfc + 2 as the target will be two bytes closer if we are |
| 2013 | able to relax. */ |
| 2014 | /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */ |
| 2015 | if ((long) value < 0xfa && (long) value > -0x100) |
| 2016 | { |
| 2017 | unsigned short code; |
| 2018 | |
| 2019 | /* Get the opcode. */ |
| 2020 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 2021 | |
| 2022 | /* Verify it's a 'bcond' and fix the opcode. */ |
| 2023 | if ((code & 0xff0f) == 0x1800) |
| 2024 | bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset); |
| 2025 | else |
| 2026 | continue; |
| 2027 | |
| 2028 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2029 | elf_section_data (sec)->relocs = internal_relocs; |
| 2030 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2031 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2032 | |
| 2033 | /* Fix the relocation's type. */ |
| 2034 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2035 | R_CR16_DISP8); |
| 2036 | |
| 2037 | /* Delete two bytes of data. */ |
| 2038 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 2039 | irel->r_offset + 2, 2)) |
| 2040 | goto error_return; |
| 2041 | |
| 2042 | /* That will change things, so, we should relax again. |
| 2043 | Note that this is not required, and it may be slow. */ |
| 2044 | *again = TRUE; |
| 2045 | } |
| 2046 | } |
| 2047 | |
| 2048 | /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */ |
| 2049 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32) |
| 2050 | { |
| 2051 | bfd_vma value = symval; |
| 2052 | unsigned short is_add_mov = 0; |
| 2053 | bfd_vma value1 = 0; |
| 2054 | |
| 2055 | /* Get the existing value from the mcode */ |
| 2056 | value1 = ((bfd_get_32 (abfd, contents + irel->r_offset + 2) >> 16) |
| 2057 | |(((bfd_get_32 (abfd, contents + irel->r_offset + 2) & 0xffff) << 16))); |
| 2058 | |
| 2059 | /* See if the value will fit in 20 bits. */ |
| 2060 | if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0) |
| 2061 | { |
| 2062 | unsigned short code; |
| 2063 | |
| 2064 | /* Get the opcode. */ |
| 2065 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 2066 | |
| 2067 | /* Verify it's a 'arithmetic ADDD or MOVD instruction'. |
| 2068 | For ADDD and MOVD only, convert to IMM32 -> IMM20. */ |
| 2069 | |
| 2070 | if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020)) |
| 2071 | is_add_mov = 1; |
| 2072 | |
| 2073 | if (is_add_mov) |
| 2074 | { |
| 2075 | /* Note that we've changed the relocs, section contents, |
| 2076 | etc. */ |
| 2077 | elf_section_data (sec)->relocs = internal_relocs; |
| 2078 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2079 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2080 | |
| 2081 | /* Fix the opcode. */ |
| 2082 | if ((code & 0xfff0) == 0x0070) /* For movd. */ |
| 2083 | bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1); |
| 2084 | else /* code == 0x0020 for addd. */ |
| 2085 | bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1); |
| 2086 | |
| 2087 | bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset); |
| 2088 | |
| 2089 | /* If existing value is nagavive adjust approriately |
| 2090 | place the 16-20bits (ie 4 bit) in new opcode, |
| 2091 | as the 0xffffxxxx, the higher 2 byte values removed. */ |
| 2092 | if (value1 & 0x80000000) |
| 2093 | bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset); |
| 2094 | else |
| 2095 | bfd_put_8 (abfd, (((value1 >> 16)&0xf) | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset); |
| 2096 | |
| 2097 | /* Fix the relocation's type. */ |
| 2098 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2099 | R_CR16_IMM20); |
| 2100 | |
| 2101 | /* Delete two bytes of data. */ |
| 2102 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 2103 | irel->r_offset + 2, 2)) |
| 2104 | goto error_return; |
| 2105 | |
| 2106 | /* That will change things, so, we should relax again. |
| 2107 | Note that this is not required, and it may be slow. */ |
| 2108 | *again = TRUE; |
| 2109 | } |
| 2110 | } |
| 2111 | |
| 2112 | /* See if the value will fit in 16 bits. */ |
| 2113 | if ((!is_add_mov) |
| 2114 | && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0)) |
| 2115 | { |
| 2116 | unsigned short code; |
| 2117 | |
| 2118 | /* Get the opcode. */ |
| 2119 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 2120 | |
| 2121 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2122 | elf_section_data (sec)->relocs = internal_relocs; |
| 2123 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2124 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2125 | |
| 2126 | /* Fix the opcode. */ |
| 2127 | if ((code & 0xf0) == 0x70) /* For movd. */ |
| 2128 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1); |
| 2129 | else if ((code & 0xf0) == 0x20) /* For addd. */ |
| 2130 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1); |
| 2131 | else if ((code & 0xf0) == 0x90) /* For cmpd. */ |
| 2132 | bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1); |
| 2133 | else |
| 2134 | continue; |
| 2135 | |
| 2136 | bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset); |
| 2137 | |
| 2138 | /* If existing value is nagavive adjust approriately |
| 2139 | place the 12-16bits (ie 4 bit) in new opcode, |
| 2140 | as the 0xfffffxxx, the higher 2 byte values removed. */ |
| 2141 | if (value1 & 0x80000000) |
| 2142 | bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset); |
| 2143 | else |
| 2144 | bfd_put_16 (abfd, value1, contents + irel->r_offset + 2); |
| 2145 | |
| 2146 | |
| 2147 | /* Fix the relocation's type. */ |
| 2148 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2149 | R_CR16_IMM16); |
| 2150 | |
| 2151 | /* Delete two bytes of data. */ |
| 2152 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 2153 | irel->r_offset + 2, 2)) |
| 2154 | goto error_return; |
| 2155 | |
| 2156 | /* That will change things, so, we should relax again. |
| 2157 | Note that this is not required, and it may be slow. */ |
| 2158 | *again = TRUE; |
| 2159 | } |
| 2160 | } |
| 2161 | |
| 2162 | #if 0 |
| 2163 | /* Try to turn a 16bit immediate address into a 4bit |
| 2164 | immediate address. */ |
| 2165 | if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) |
| 2166 | || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16)) |
| 2167 | { |
| 2168 | bfd_vma value = symval; |
| 2169 | bfd_vma value1 = 0; |
| 2170 | |
| 2171 | /* Get the existing value from the mcode */ |
| 2172 | value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff)); |
| 2173 | |
| 2174 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) |
| 2175 | { |
| 2176 | value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) & 0xf000) << 0x4); |
| 2177 | } |
| 2178 | |
| 2179 | /* See if the value will fit in 4 bits. */ |
| 2180 | if ((((long) (value + value1)) < 0xf) |
| 2181 | && (((long) (value + value1)) > 0)) |
| 2182 | { |
| 2183 | unsigned short code; |
| 2184 | |
| 2185 | /* Get the opcode. */ |
| 2186 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 2187 | |
| 2188 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2189 | elf_section_data (sec)->relocs = internal_relocs; |
| 2190 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2191 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2192 | |
| 2193 | /* Fix the opcode. */ |
| 2194 | if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500)) |
| 2195 | { |
| 2196 | if ((code & 0x0f00) == 0x0400) /* For movd imm20. */ |
| 2197 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
| 2198 | else /* For addd imm20. */ |
| 2199 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
| 2200 | bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1); |
| 2201 | } |
| 2202 | else |
| 2203 | { |
| 2204 | if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */ |
| 2205 | bfd_put_8 (abfd, 0x56, contents + irel->r_offset); |
| 2206 | else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */ |
| 2207 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
| 2208 | else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */ |
| 2209 | bfd_put_8 (abfd, 0x58, contents + irel->r_offset); |
| 2210 | else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */ |
| 2211 | bfd_put_8 (abfd, 0x5A, contents + irel->r_offset); |
| 2212 | else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */ |
| 2213 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
| 2214 | else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */ |
| 2215 | bfd_put_8 (abfd, 0x30, contents + irel->r_offset); |
| 2216 | else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */ |
| 2217 | bfd_put_8 (abfd, 0x2C, contents + irel->r_offset); |
| 2218 | else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */ |
| 2219 | bfd_put_8 (abfd, 0x32, contents + irel->r_offset); |
| 2220 | else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */ |
| 2221 | bfd_put_8 (abfd, 0x38, contents + irel->r_offset); |
| 2222 | else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */ |
| 2223 | bfd_put_8 (abfd, 0x3C, contents + irel->r_offset); |
| 2224 | else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */ |
| 2225 | bfd_put_8 (abfd, 0x3F, contents + irel->r_offset); |
| 2226 | else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */ |
| 2227 | bfd_put_8 (abfd, 0x3A, contents + irel->r_offset); |
| 2228 | else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */ |
| 2229 | bfd_put_8 (abfd, 0x50, contents + irel->r_offset); |
| 2230 | else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */ |
| 2231 | bfd_put_8 (abfd, 0x52, contents + irel->r_offset); |
| 2232 | else |
| 2233 | continue; |
| 2234 | |
| 2235 | bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1); |
| 2236 | } |
| 2237 | |
| 2238 | /* Fix the relocation's type. */ |
| 2239 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2240 | R_CR16_IMM4); |
| 2241 | |
| 2242 | /* Delete two bytes of data. */ |
| 2243 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 2244 | irel->r_offset + 2, 2)) |
| 2245 | goto error_return; |
| 2246 | |
| 2247 | /* That will change things, so, we should relax again. |
| 2248 | Note that this is not required, and it may be slow. */ |
| 2249 | *again = TRUE; |
| 2250 | } |
| 2251 | } |
| 2252 | #endif |
| 2253 | } |
| 2254 | |
| 2255 | if (isymbuf != NULL |
| 2256 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2257 | { |
| 2258 | if (! link_info->keep_memory) |
| 2259 | free (isymbuf); |
| 2260 | else |
| 2261 | /* Cache the symbols for elf_link_input_bfd. */ |
| 2262 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2263 | } |
| 2264 | |
| 2265 | if (contents != NULL |
| 2266 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2267 | { |
| 2268 | if (! link_info->keep_memory) |
| 2269 | free (contents); |
| 2270 | else |
| 2271 | /* Cache the section contents for elf_link_input_bfd. */ |
| 2272 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2273 | |
| 2274 | } |
| 2275 | |
| 2276 | if (internal_relocs != NULL |
| 2277 | && elf_section_data (sec)->relocs != internal_relocs) |
| 2278 | free (internal_relocs); |
| 2279 | |
| 2280 | return TRUE; |
| 2281 | |
| 2282 | error_return: |
| 2283 | if (isymbuf != NULL |
| 2284 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2285 | free (isymbuf); |
| 2286 | if (contents != NULL |
| 2287 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2288 | free (contents); |
| 2289 | if (internal_relocs != NULL |
| 2290 | && elf_section_data (sec)->relocs != internal_relocs) |
| 2291 | free (internal_relocs); |
| 2292 | |
| 2293 | return FALSE; |
| 2294 | } |
| 2295 | |
| 2296 | static asection * |
| 2297 | elf32_cr16_gc_mark_hook (asection *sec, |
| 2298 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2299 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, |
| 2300 | struct elf_link_hash_entry *h, |
| 2301 | Elf_Internal_Sym *sym) |
| 2302 | { |
| 2303 | if (h == NULL) |
| 2304 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 2305 | |
| 2306 | switch (h->root.type) |
| 2307 | { |
| 2308 | case bfd_link_hash_defined: |
| 2309 | case bfd_link_hash_defweak: |
| 2310 | return h->root.u.def.section; |
| 2311 | |
| 2312 | case bfd_link_hash_common: |
| 2313 | return h->root.u.c.p->section; |
| 2314 | |
| 2315 | default: |
| 2316 | return NULL; |
| 2317 | } |
| 2318 | } |
| 2319 | |
| 2320 | /* Update the got entry reference counts for the section being removed. */ |
| 2321 | |
| 2322 | static bfd_boolean |
| 2323 | elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 2324 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2325 | asection *sec ATTRIBUTE_UNUSED, |
| 2326 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) |
| 2327 | { |
| 2328 | /* We don't support garbage collection of GOT and PLT relocs yet. */ |
| 2329 | return TRUE; |
| 2330 | } |
| 2331 | |
| 2332 | /* Create dynamic sections when linking against a dynamic object. */ |
| 2333 | |
| 2334 | static bfd_boolean |
| 2335 | _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 2336 | { |
| 2337 | flagword flags; |
| 2338 | asection * s; |
| 2339 | const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
| 2340 | int ptralign = 0; |
| 2341 | |
| 2342 | switch (bed->s->arch_size) |
| 2343 | { |
| 2344 | case 16: |
| 2345 | ptralign = 1; |
| 2346 | break; |
| 2347 | |
| 2348 | case 32: |
| 2349 | ptralign = 2; |
| 2350 | break; |
| 2351 | |
| 2352 | default: |
| 2353 | bfd_set_error (bfd_error_bad_value); |
| 2354 | return FALSE; |
| 2355 | } |
| 2356 | |
| 2357 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| 2358 | .rel[a].bss sections. */ |
| 2359 | |
| 2360 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2361 | | SEC_LINKER_CREATED); |
| 2362 | |
| 2363 | s = bfd_make_section_with_flags (abfd, |
| 2364 | (bed->default_use_rela_p |
| 2365 | ? ".rela.plt" : ".rel.plt"), |
| 2366 | flags | SEC_READONLY); |
| 2367 | if (s == NULL |
| 2368 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 2369 | return FALSE; |
| 2370 | |
| 2371 | if (! _bfd_cr16_elf_create_got_section (abfd, info)) |
| 2372 | return FALSE; |
| 2373 | |
| 2374 | { |
| 2375 | const char * secname; |
| 2376 | char * relname; |
| 2377 | flagword secflags; |
| 2378 | asection * sec; |
| 2379 | |
| 2380 | for (sec = abfd->sections; sec; sec = sec->next) |
| 2381 | { |
| 2382 | secflags = bfd_get_section_flags (abfd, sec); |
| 2383 | if ((secflags & (SEC_DATA | SEC_LINKER_CREATED)) |
| 2384 | || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS)) |
| 2385 | continue; |
| 2386 | |
| 2387 | secname = bfd_get_section_name (abfd, sec); |
| 2388 | relname = (char *) bfd_malloc (strlen (secname) + 6); |
| 2389 | strcpy (relname, ".rela"); |
| 2390 | strcat (relname, secname); |
| 2391 | |
| 2392 | s = bfd_make_section_with_flags (abfd, relname, |
| 2393 | flags | SEC_READONLY); |
| 2394 | if (s == NULL |
| 2395 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 2396 | return FALSE; |
| 2397 | } |
| 2398 | } |
| 2399 | |
| 2400 | if (bed->want_dynbss) |
| 2401 | { |
| 2402 | /* The .dynbss section is a place to put symbols which are defined |
| 2403 | by dynamic objects, are referenced by regular objects, and are |
| 2404 | not functions. We must allocate space for them in the process |
| 2405 | image and use a R_*_COPY reloc to tell the dynamic linker to |
| 2406 | initialize them at run time. The linker script puts the .dynbss |
| 2407 | section into the .bss section of the final image. */ |
| 2408 | s = bfd_make_section_with_flags (abfd, ".dynbss", |
| 2409 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 2410 | if (s == NULL) |
| 2411 | return FALSE; |
| 2412 | |
| 2413 | /* The .rel[a].bss section holds copy relocs. This section is not |
| 2414 | normally needed. We need to create it here, though, so that the |
| 2415 | linker will map it to an output section. We can't just create it |
| 2416 | only if we need it, because we will not know whether we need it |
| 2417 | until we have seen all the input files, and the first time the |
| 2418 | main linker code calls BFD after examining all the input files |
| 2419 | (size_dynamic_sections) the input sections have already been |
| 2420 | mapped to the output sections. If the section turns out not to |
| 2421 | be needed, we can discard it later. We will never need this |
| 2422 | section when generating a shared object, since they do not use |
| 2423 | copy relocs. */ |
| 2424 | if (! info->executable) |
| 2425 | { |
| 2426 | s = bfd_make_section_with_flags (abfd, |
| 2427 | (bed->default_use_rela_p |
| 2428 | ? ".rela.bss" : ".rel.bss"), |
| 2429 | flags | SEC_READONLY); |
| 2430 | if (s == NULL |
| 2431 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 2432 | return FALSE; |
| 2433 | } |
| 2434 | } |
| 2435 | |
| 2436 | return TRUE; |
| 2437 | } |
| 2438 | \f |
| 2439 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2440 | regular object. The current definition is in some section of the |
| 2441 | dynamic object, but we're not including those sections. We have to |
| 2442 | change the definition to something the rest of the link can |
| 2443 | understand. */ |
| 2444 | |
| 2445 | static bfd_boolean |
| 2446 | _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info, |
| 2447 | struct elf_link_hash_entry * h) |
| 2448 | { |
| 2449 | bfd * dynobj; |
| 2450 | asection * s; |
| 2451 | |
| 2452 | dynobj = elf_hash_table (info)->dynobj; |
| 2453 | |
| 2454 | /* Make sure we know what is going on here. */ |
| 2455 | BFD_ASSERT (dynobj != NULL |
| 2456 | && (h->needs_plt |
| 2457 | || h->u.weakdef != NULL |
| 2458 | || (h->def_dynamic |
| 2459 | && h->ref_regular |
| 2460 | && !h->def_regular))); |
| 2461 | |
| 2462 | /* If this is a function, put it in the procedure linkage table. We |
| 2463 | will fill in the contents of the procedure linkage table later, |
| 2464 | when we know the address of the .got section. */ |
| 2465 | if (h->type == STT_FUNC |
| 2466 | || h->needs_plt) |
| 2467 | { |
| 2468 | if (! info->executable |
| 2469 | && !h->def_dynamic |
| 2470 | && !h->ref_dynamic) |
| 2471 | { |
| 2472 | /* This case can occur if we saw a PLT reloc in an input |
| 2473 | file, but the symbol was never referred to by a dynamic |
| 2474 | object. In such a case, we don't actually need to build |
| 2475 | a procedure linkage table, and we can just do a REL32 |
| 2476 | reloc instead. */ |
| 2477 | BFD_ASSERT (h->needs_plt); |
| 2478 | return TRUE; |
| 2479 | } |
| 2480 | |
| 2481 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2482 | if (h->dynindx == -1) |
| 2483 | { |
| 2484 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2485 | return FALSE; |
| 2486 | } |
| 2487 | |
| 2488 | /* We also need to make an entry in the .got.plt section, which |
| 2489 | will be placed in the .got section by the linker script. */ |
| 2490 | |
| 2491 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 2492 | BFD_ASSERT (s != NULL); |
| 2493 | s->size += 4; |
| 2494 | |
| 2495 | /* We also need to make an entry in the .rela.plt section. */ |
| 2496 | |
| 2497 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2498 | BFD_ASSERT (s != NULL); |
| 2499 | s->size += sizeof (Elf32_External_Rela); |
| 2500 | |
| 2501 | return TRUE; |
| 2502 | } |
| 2503 | |
| 2504 | /* If this is a weak symbol, and there is a real definition, the |
| 2505 | processor independent code will have arranged for us to see the |
| 2506 | real definition first, and we can just use the same value. */ |
| 2507 | if (h->u.weakdef != NULL) |
| 2508 | { |
| 2509 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 2510 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 2511 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 2512 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 2513 | return TRUE; |
| 2514 | } |
| 2515 | |
| 2516 | /* This is a reference to a symbol defined by a dynamic object which |
| 2517 | is not a function. */ |
| 2518 | |
| 2519 | /* If we are creating a shared library, we must presume that the |
| 2520 | only references to the symbol are via the global offset table. |
| 2521 | For such cases we need not do anything here; the relocations will |
| 2522 | be handled correctly by relocate_section. */ |
| 2523 | if (info->executable) |
| 2524 | return TRUE; |
| 2525 | |
| 2526 | /* If there are no references to this symbol that do not use the |
| 2527 | GOT, we don't need to generate a copy reloc. */ |
| 2528 | if (!h->non_got_ref) |
| 2529 | return TRUE; |
| 2530 | |
| 2531 | if (h->size == 0) |
| 2532 | { |
| 2533 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| 2534 | h->root.root.string); |
| 2535 | return TRUE; |
| 2536 | } |
| 2537 | |
| 2538 | /* We must allocate the symbol in our .dynbss section, which will |
| 2539 | become part of the .bss section of the executable. There will be |
| 2540 | an entry for this symbol in the .dynsym section. The dynamic |
| 2541 | object will contain position independent code, so all references |
| 2542 | from the dynamic object to this symbol will go through the global |
| 2543 | offset table. The dynamic linker will use the .dynsym entry to |
| 2544 | determine the address it must put in the global offset table, so |
| 2545 | both the dynamic object and the regular object will refer to the |
| 2546 | same memory location for the variable. */ |
| 2547 | |
| 2548 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 2549 | BFD_ASSERT (s != NULL); |
| 2550 | |
| 2551 | /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to |
| 2552 | copy the initial value out of the dynamic object and into the |
| 2553 | runtime process image. We need to remember the offset into the |
| 2554 | .rela.bss section we are going to use. */ |
| 2555 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 2556 | { |
| 2557 | asection * srel; |
| 2558 | |
| 2559 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 2560 | BFD_ASSERT (srel != NULL); |
| 2561 | srel->size += sizeof (Elf32_External_Rela); |
| 2562 | h->needs_copy = 1; |
| 2563 | } |
| 2564 | |
| 2565 | return _bfd_elf_adjust_dynamic_copy (h, s); |
| 2566 | } |
| 2567 | |
| 2568 | /* Set the sizes of the dynamic sections. */ |
| 2569 | |
| 2570 | static bfd_boolean |
| 2571 | _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd, |
| 2572 | struct bfd_link_info * info) |
| 2573 | { |
| 2574 | bfd * dynobj; |
| 2575 | asection * s; |
| 2576 | bfd_boolean plt; |
| 2577 | bfd_boolean relocs; |
| 2578 | bfd_boolean reltext; |
| 2579 | |
| 2580 | dynobj = elf_hash_table (info)->dynobj; |
| 2581 | BFD_ASSERT (dynobj != NULL); |
| 2582 | |
| 2583 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2584 | { |
| 2585 | /* Set the contents of the .interp section to the interpreter. */ |
| 2586 | if (info->executable) |
| 2587 | { |
| 2588 | #if 0 |
| 2589 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 2590 | BFD_ASSERT (s != NULL); |
| 2591 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2592 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2593 | #endif |
| 2594 | } |
| 2595 | } |
| 2596 | else |
| 2597 | { |
| 2598 | /* We may have created entries in the .rela.got section. |
| 2599 | However, if we are not creating the dynamic sections, we will |
| 2600 | not actually use these entries. Reset the size of .rela.got, |
| 2601 | which will cause it to get stripped from the output file |
| 2602 | below. */ |
| 2603 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2604 | if (s != NULL) |
| 2605 | s->size = 0; |
| 2606 | } |
| 2607 | |
| 2608 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 2609 | determined the sizes of the various dynamic sections. Allocate |
| 2610 | memory for them. */ |
| 2611 | plt = FALSE; |
| 2612 | relocs = FALSE; |
| 2613 | reltext = FALSE; |
| 2614 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2615 | { |
| 2616 | const char * name; |
| 2617 | |
| 2618 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2619 | continue; |
| 2620 | |
| 2621 | /* It's OK to base decisions on the section name, because none |
| 2622 | of the dynobj section names depend upon the input files. */ |
| 2623 | name = bfd_get_section_name (dynobj, s); |
| 2624 | |
| 2625 | if (strcmp (name, ".plt") == 0) |
| 2626 | { |
| 2627 | /* Remember whether there is a PLT. */ |
| 2628 | plt = s->size != 0; |
| 2629 | } |
| 2630 | else if (CONST_STRNEQ (name, ".rela")) |
| 2631 | { |
| 2632 | if (s->size != 0) |
| 2633 | { |
| 2634 | asection * target; |
| 2635 | |
| 2636 | /* Remember whether there are any reloc sections other |
| 2637 | than .rela.plt. */ |
| 2638 | if (strcmp (name, ".rela.plt") != 0) |
| 2639 | { |
| 2640 | const char * outname; |
| 2641 | |
| 2642 | relocs = TRUE; |
| 2643 | |
| 2644 | /* If this relocation section applies to a read only |
| 2645 | section, then we probably need a DT_TEXTREL |
| 2646 | entry. The entries in the .rela.plt section |
| 2647 | really apply to the .got section, which we |
| 2648 | created ourselves and so know is not readonly. */ |
| 2649 | outname = bfd_get_section_name (output_bfd, |
| 2650 | s->output_section); |
| 2651 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 2652 | if (target != NULL |
| 2653 | && (target->flags & SEC_READONLY) != 0 |
| 2654 | && (target->flags & SEC_ALLOC) != 0) |
| 2655 | reltext = TRUE; |
| 2656 | } |
| 2657 | |
| 2658 | /* We use the reloc_count field as a counter if we need |
| 2659 | to copy relocs into the output file. */ |
| 2660 | s->reloc_count = 0; |
| 2661 | } |
| 2662 | } |
| 2663 | else if (! CONST_STRNEQ (name, ".got") |
| 2664 | && strcmp (name, ".dynbss") != 0) |
| 2665 | /* It's not one of our sections, so don't allocate space. */ |
| 2666 | continue; |
| 2667 | |
| 2668 | if (s->size == 0) |
| 2669 | { |
| 2670 | /* If we don't need this section, strip it from the |
| 2671 | output file. This is mostly to handle .rela.bss and |
| 2672 | .rela.plt. We must create both sections in |
| 2673 | create_dynamic_sections, because they must be created |
| 2674 | before the linker maps input sections to output |
| 2675 | sections. The linker does that before |
| 2676 | adjust_dynamic_symbol is called, and it is that |
| 2677 | function which decides whether anything needs to go |
| 2678 | into these sections. */ |
| 2679 | s->flags |= SEC_EXCLUDE; |
| 2680 | continue; |
| 2681 | } |
| 2682 | |
| 2683 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 2684 | continue; |
| 2685 | |
| 2686 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 2687 | here in case unused entries are not reclaimed before the |
| 2688 | section's contents are written out. This should not happen, |
| 2689 | but this way if it does, we get a R_CR16_NONE reloc |
| 2690 | instead of garbage. */ |
| 2691 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 2692 | if (s->contents == NULL) |
| 2693 | return FALSE; |
| 2694 | } |
| 2695 | |
| 2696 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2697 | { |
| 2698 | /* Add some entries to the .dynamic section. We fill in the |
| 2699 | values later, in _bfd_cr16_elf_finish_dynamic_sections, |
| 2700 | but we must add the entries now so that we get the correct |
| 2701 | size for the .dynamic section. The DT_DEBUG entry is filled |
| 2702 | in by the dynamic linker and used by the debugger. */ |
| 2703 | if (! info->executable) |
| 2704 | { |
| 2705 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 2706 | return FALSE; |
| 2707 | } |
| 2708 | |
| 2709 | if (plt) |
| 2710 | { |
| 2711 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
| 2712 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 2713 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| 2714 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 2715 | return FALSE; |
| 2716 | } |
| 2717 | |
| 2718 | if (relocs) |
| 2719 | { |
| 2720 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) |
| 2721 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) |
| 2722 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
| 2723 | sizeof (Elf32_External_Rela))) |
| 2724 | return FALSE; |
| 2725 | } |
| 2726 | |
| 2727 | if (reltext) |
| 2728 | { |
| 2729 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 2730 | return FALSE; |
| 2731 | } |
| 2732 | } |
| 2733 | |
| 2734 | return TRUE; |
| 2735 | } |
| 2736 | |
| 2737 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2738 | dynamic sections here. */ |
| 2739 | |
| 2740 | static bfd_boolean |
| 2741 | _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd, |
| 2742 | struct bfd_link_info * info, |
| 2743 | struct elf_link_hash_entry * h, |
| 2744 | Elf_Internal_Sym * sym) |
| 2745 | { |
| 2746 | bfd * dynobj; |
| 2747 | |
| 2748 | dynobj = elf_hash_table (info)->dynobj; |
| 2749 | |
| 2750 | if (h->got.offset != (bfd_vma) -1) |
| 2751 | { |
| 2752 | asection * sgot; |
| 2753 | asection * srel; |
| 2754 | Elf_Internal_Rela rel; |
| 2755 | |
| 2756 | /* This symbol has an entry in the global offset table. Set it up. */ |
| 2757 | |
| 2758 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2759 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2760 | BFD_ASSERT (sgot != NULL && srel != NULL); |
| 2761 | |
| 2762 | rel.r_offset = (sgot->output_section->vma |
| 2763 | + sgot->output_offset |
| 2764 | + (h->got.offset & ~1)); |
| 2765 | |
| 2766 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 2767 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 2768 | the symbol was forced to be local because of a version file. |
| 2769 | The entry in the global offset table will already have been |
| 2770 | initialized in the relocate_section function. */ |
| 2771 | if (info->executable |
| 2772 | && (info->symbolic || h->dynindx == -1) |
| 2773 | && h->def_regular) |
| 2774 | { |
| 2775 | rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20); |
| 2776 | rel.r_addend = (h->root.u.def.value |
| 2777 | + h->root.u.def.section->output_section->vma |
| 2778 | + h->root.u.def.section->output_offset); |
| 2779 | } |
| 2780 | else |
| 2781 | { |
| 2782 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 2783 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20); |
| 2784 | rel.r_addend = 0; |
| 2785 | } |
| 2786 | |
| 2787 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 2788 | (bfd_byte *) ((Elf32_External_Rela *) srel->contents |
| 2789 | + srel->reloc_count)); |
| 2790 | ++ srel->reloc_count; |
| 2791 | } |
| 2792 | |
| 2793 | if (h->needs_copy) |
| 2794 | { |
| 2795 | asection * s; |
| 2796 | Elf_Internal_Rela rel; |
| 2797 | |
| 2798 | /* This symbol needs a copy reloc. Set it up. */ |
| 2799 | BFD_ASSERT (h->dynindx != -1 |
| 2800 | && (h->root.type == bfd_link_hash_defined |
| 2801 | || h->root.type == bfd_link_hash_defweak)); |
| 2802 | |
| 2803 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 2804 | ".rela.bss"); |
| 2805 | BFD_ASSERT (s != NULL); |
| 2806 | |
| 2807 | rel.r_offset = (h->root.u.def.value |
| 2808 | + h->root.u.def.section->output_section->vma |
| 2809 | + h->root.u.def.section->output_offset); |
| 2810 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20); |
| 2811 | rel.r_addend = 0; |
| 2812 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 2813 | (bfd_byte *) ((Elf32_External_Rela *) s->contents |
| 2814 | + s->reloc_count)); |
| 2815 | ++ s->reloc_count; |
| 2816 | } |
| 2817 | |
| 2818 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 2819 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2820 | || h == elf_hash_table (info)->hgot) |
| 2821 | sym->st_shndx = SHN_ABS; |
| 2822 | |
| 2823 | return TRUE; |
| 2824 | } |
| 2825 | |
| 2826 | /* Finish up the dynamic sections. */ |
| 2827 | |
| 2828 | static bfd_boolean |
| 2829 | _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd, |
| 2830 | struct bfd_link_info * info) |
| 2831 | { |
| 2832 | bfd * dynobj; |
| 2833 | asection * sgot; |
| 2834 | asection * sdyn; |
| 2835 | |
| 2836 | dynobj = elf_hash_table (info)->dynobj; |
| 2837 | |
| 2838 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 2839 | BFD_ASSERT (sgot != NULL); |
| 2840 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2841 | |
| 2842 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2843 | { |
| 2844 | Elf32_External_Dyn * dyncon; |
| 2845 | Elf32_External_Dyn * dynconend; |
| 2846 | |
| 2847 | BFD_ASSERT (sdyn != NULL); |
| 2848 | |
| 2849 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2850 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 2851 | |
| 2852 | for (; dyncon < dynconend; dyncon++) |
| 2853 | { |
| 2854 | Elf_Internal_Dyn dyn; |
| 2855 | const char * name; |
| 2856 | asection * s; |
| 2857 | |
| 2858 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2859 | |
| 2860 | switch (dyn.d_tag) |
| 2861 | { |
| 2862 | default: |
| 2863 | break; |
| 2864 | |
| 2865 | case DT_PLTGOT: |
| 2866 | name = ".got"; |
| 2867 | goto get_vma; |
| 2868 | |
| 2869 | case DT_JMPREL: |
| 2870 | name = ".rela.plt"; |
| 2871 | get_vma: |
| 2872 | s = bfd_get_section_by_name (output_bfd, name); |
| 2873 | BFD_ASSERT (s != NULL); |
| 2874 | dyn.d_un.d_ptr = s->vma; |
| 2875 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2876 | break; |
| 2877 | |
| 2878 | case DT_PLTRELSZ: |
| 2879 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 2880 | BFD_ASSERT (s != NULL); |
| 2881 | dyn.d_un.d_val = s->size; |
| 2882 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2883 | break; |
| 2884 | |
| 2885 | case DT_RELASZ: |
| 2886 | /* My reading of the SVR4 ABI indicates that the |
| 2887 | procedure linkage table relocs (DT_JMPREL) should be |
| 2888 | included in the overall relocs (DT_RELA). This is |
| 2889 | what Solaris does. However, UnixWare can not handle |
| 2890 | that case. Therefore, we override the DT_RELASZ entry |
| 2891 | here to make it not include the JMPREL relocs. Since |
| 2892 | the linker script arranges for .rela.plt to follow all |
| 2893 | other relocation sections, we don't have to worry |
| 2894 | about changing the DT_RELA entry. */ |
| 2895 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 2896 | if (s != NULL) |
| 2897 | dyn.d_un.d_val -= s->size; |
| 2898 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2899 | break; |
| 2900 | } |
| 2901 | } |
| 2902 | |
| 2903 | } |
| 2904 | |
| 2905 | /* Fill in the first three entries in the global offset table. */ |
| 2906 | if (sgot->size > 0) |
| 2907 | { |
| 2908 | if (sdyn == NULL) |
| 2909 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 2910 | else |
| 2911 | bfd_put_32 (output_bfd, |
| 2912 | sdyn->output_section->vma + sdyn->output_offset, |
| 2913 | sgot->contents); |
| 2914 | } |
| 2915 | |
| 2916 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 2917 | |
| 2918 | return TRUE; |
| 2919 | } |
| 2920 | |
| 2921 | /* Given a .data.rel section and a .emreloc in-memory section, store |
| 2922 | relocation information into the .emreloc section which can be |
| 2923 | used at runtime to relocate the section. This is called by the |
| 2924 | linker when the --embedded-relocs switch is used. This is called |
| 2925 | after the add_symbols entry point has been called for all the |
| 2926 | objects, and before the final_link entry point is called. */ |
| 2927 | |
| 2928 | bfd_boolean |
| 2929 | bfd_cr16_elf32_create_embedded_relocs (bfd *abfd, |
| 2930 | struct bfd_link_info *info, |
| 2931 | asection *datasec, |
| 2932 | asection *relsec, |
| 2933 | char **errmsg) |
| 2934 | { |
| 2935 | Elf_Internal_Shdr *symtab_hdr; |
| 2936 | Elf_Internal_Sym *isymbuf = NULL; |
| 2937 | Elf_Internal_Rela *internal_relocs = NULL; |
| 2938 | Elf_Internal_Rela *irel, *irelend; |
| 2939 | bfd_byte *p; |
| 2940 | bfd_size_type amt; |
| 2941 | |
| 2942 | BFD_ASSERT (! info->relocatable); |
| 2943 | |
| 2944 | *errmsg = NULL; |
| 2945 | |
| 2946 | if (datasec->reloc_count == 0) |
| 2947 | return TRUE; |
| 2948 | |
| 2949 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2950 | |
| 2951 | /* Get a copy of the native relocations. */ |
| 2952 | internal_relocs = (_bfd_elf_link_read_relocs |
| 2953 | (abfd, datasec, NULL, NULL, info->keep_memory)); |
| 2954 | if (internal_relocs == NULL) |
| 2955 | goto error_return; |
| 2956 | |
| 2957 | amt = (bfd_size_type) datasec->reloc_count * 8; |
| 2958 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); |
| 2959 | if (relsec->contents == NULL) |
| 2960 | goto error_return; |
| 2961 | |
| 2962 | p = relsec->contents; |
| 2963 | |
| 2964 | irelend = internal_relocs + datasec->reloc_count; |
| 2965 | for (irel = internal_relocs; irel < irelend; irel++, p += 8) |
| 2966 | { |
| 2967 | asection *targetsec; |
| 2968 | |
| 2969 | /* We are going to write a four byte longword into the runtime |
| 2970 | reloc section. The longword will be the address in the data |
| 2971 | section which must be relocated. It is followed by the name |
| 2972 | of the target section NUL-padded or truncated to 8 |
| 2973 | characters. */ |
| 2974 | |
| 2975 | /* We can only relocate absolute longword relocs at run time. */ |
| 2976 | if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a) |
| 2977 | || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32))) |
| 2978 | { |
| 2979 | *errmsg = _("unsupported reloc type"); |
| 2980 | bfd_set_error (bfd_error_bad_value); |
| 2981 | goto error_return; |
| 2982 | } |
| 2983 | |
| 2984 | /* Get the target section referred to by the reloc. */ |
| 2985 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2986 | { |
| 2987 | /* A local symbol. */ |
| 2988 | Elf_Internal_Sym *isym; |
| 2989 | |
| 2990 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 2991 | if (isymbuf == NULL) |
| 2992 | { |
| 2993 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2994 | if (isymbuf == NULL) |
| 2995 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2996 | symtab_hdr->sh_info, 0, |
| 2997 | NULL, NULL, NULL); |
| 2998 | if (isymbuf == NULL) |
| 2999 | goto error_return; |
| 3000 | } |
| 3001 | |
| 3002 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 3003 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3004 | } |
| 3005 | else |
| 3006 | { |
| 3007 | unsigned long indx; |
| 3008 | struct elf_link_hash_entry *h; |
| 3009 | |
| 3010 | /* An external symbol. */ |
| 3011 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 3012 | h = elf_sym_hashes (abfd)[indx]; |
| 3013 | BFD_ASSERT (h != NULL); |
| 3014 | if (h->root.type == bfd_link_hash_defined |
| 3015 | || h->root.type == bfd_link_hash_defweak) |
| 3016 | targetsec = h->root.u.def.section; |
| 3017 | else |
| 3018 | targetsec = NULL; |
| 3019 | } |
| 3020 | |
| 3021 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); |
| 3022 | memset (p + 4, 0, 4); |
| 3023 | if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a) |
| 3024 | && (targetsec != NULL) ) |
| 3025 | strncpy ((char *) p + 4, targetsec->output_section->name, 4); |
| 3026 | } |
| 3027 | |
| 3028 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3029 | free (isymbuf); |
| 3030 | if (internal_relocs != NULL |
| 3031 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 3032 | free (internal_relocs); |
| 3033 | return TRUE; |
| 3034 | |
| 3035 | error_return: |
| 3036 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3037 | free (isymbuf); |
| 3038 | if (internal_relocs != NULL |
| 3039 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 3040 | free (internal_relocs); |
| 3041 | return FALSE; |
| 3042 | } |
| 3043 | |
| 3044 | |
| 3045 | /* Classify relocation types, such that combreloc can sort them |
| 3046 | properly. */ |
| 3047 | |
| 3048 | static enum elf_reloc_type_class |
| 3049 | _bfd_cr16_elf_reloc_type_class (const Elf_Internal_Rela *rela) |
| 3050 | { |
| 3051 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 3052 | { |
| 3053 | case R_CR16_GOT_REGREL20: |
| 3054 | case R_CR16_GOTC_REGREL20: |
| 3055 | return reloc_class_relative; |
| 3056 | default: |
| 3057 | return reloc_class_normal; |
| 3058 | } |
| 3059 | } |
| 3060 | |
| 3061 | /* Definitions for setting CR16 target vector. */ |
| 3062 | #define TARGET_LITTLE_SYM bfd_elf32_cr16_vec |
| 3063 | #define TARGET_LITTLE_NAME "elf32-cr16" |
| 3064 | #define ELF_ARCH bfd_arch_cr16 |
| 3065 | #define ELF_MACHINE_CODE EM_CR16 |
| 3066 | #define ELF_MACHINE_ALT1 EM_CR16_OLD |
| 3067 | #define ELF_MAXPAGESIZE 0x1 |
| 3068 | #define elf_symbol_leading_char '_' |
| 3069 | |
| 3070 | #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup |
| 3071 | #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup |
| 3072 | #define elf_info_to_howto elf_cr16_info_to_howto |
| 3073 | #define elf_info_to_howto_rel 0 |
| 3074 | #define elf_backend_relocate_section elf32_cr16_relocate_section |
| 3075 | #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section |
| 3076 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 3077 | elf32_cr16_get_relocated_section_contents |
| 3078 | #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook |
| 3079 | #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook |
| 3080 | #define elf_backend_can_gc_sections 1 |
| 3081 | #define elf_backend_rela_normal 1 |
| 3082 | #define elf_backend_check_relocs cr16_elf_check_relocs |
| 3083 | /* So we can set bits in e_flags. */ |
| 3084 | #define elf_backend_final_write_processing \ |
| 3085 | _bfd_cr16_elf_final_write_processing |
| 3086 | #define elf_backend_object_p _bfd_cr16_elf_object_p |
| 3087 | |
| 3088 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 3089 | _bfd_cr16_elf_merge_private_bfd_data |
| 3090 | |
| 3091 | |
| 3092 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 3093 | elf32_cr16_link_hash_table_create |
| 3094 | #define bfd_elf32_bfd_link_hash_table_free \ |
| 3095 | elf32_cr16_link_hash_table_free |
| 3096 | |
| 3097 | #define elf_backend_create_dynamic_sections \ |
| 3098 | _bfd_cr16_elf_create_dynamic_sections |
| 3099 | #define elf_backend_adjust_dynamic_symbol \ |
| 3100 | _bfd_cr16_elf_adjust_dynamic_symbol |
| 3101 | #define elf_backend_size_dynamic_sections \ |
| 3102 | _bfd_cr16_elf_size_dynamic_sections |
| 3103 | #define elf_backend_omit_section_dynsym \ |
| 3104 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) |
| 3105 | #define elf_backend_finish_dynamic_symbol \ |
| 3106 | _bfd_cr16_elf_finish_dynamic_symbol |
| 3107 | #define elf_backend_finish_dynamic_sections \ |
| 3108 | _bfd_cr16_elf_finish_dynamic_sections |
| 3109 | |
| 3110 | #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class |
| 3111 | |
| 3112 | |
| 3113 | #define elf_backend_want_got_plt 1 |
| 3114 | #define elf_backend_plt_readonly 1 |
| 3115 | #define elf_backend_want_plt_sym 0 |
| 3116 | #define elf_backend_got_header_size 12 |
| 3117 | |
| 3118 | #include "elf32-target.h" |