| 1 | /* Xilinx MicroBlaze-specific support for 32-bit ELF |
| 2 | |
| 3 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the |
| 19 | Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | |
| 23 | int dbg = 0; |
| 24 | |
| 25 | #include "sysdep.h" |
| 26 | #include "bfd.h" |
| 27 | #include "bfdlink.h" |
| 28 | #include "libbfd.h" |
| 29 | #include "elf-bfd.h" |
| 30 | #include "elf/microblaze.h" |
| 31 | #include <assert.h> |
| 32 | |
| 33 | #define USE_RELA /* Only USE_REL is actually significant, but this is |
| 34 | here are a reminder... */ |
| 35 | #define INST_WORD_SIZE 4 |
| 36 | |
| 37 | static int ro_small_data_pointer = 0; |
| 38 | static int rw_small_data_pointer = 0; |
| 39 | |
| 40 | static reloc_howto_type * microblaze_elf_howto_table [(int) R_MICROBLAZE_max]; |
| 41 | |
| 42 | static reloc_howto_type microblaze_elf_howto_raw[] = |
| 43 | { |
| 44 | /* This reloc does nothing. */ |
| 45 | HOWTO (R_MICROBLAZE_NONE, /* Type. */ |
| 46 | 0, /* Rightshift. */ |
| 47 | 3, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 48 | 0, /* Bitsize. */ |
| 49 | FALSE, /* PC_relative. */ |
| 50 | 0, /* Bitpos. */ |
| 51 | complain_overflow_dont, /* Complain on overflow. */ |
| 52 | NULL, /* Special Function. */ |
| 53 | "R_MICROBLAZE_NONE", /* Name. */ |
| 54 | FALSE, /* Partial Inplace. */ |
| 55 | 0, /* Source Mask. */ |
| 56 | 0, /* Dest Mask. */ |
| 57 | FALSE), /* PC relative offset? */ |
| 58 | |
| 59 | /* A standard 32 bit relocation. */ |
| 60 | HOWTO (R_MICROBLAZE_32, /* Type. */ |
| 61 | 0, /* Rightshift. */ |
| 62 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 63 | 32, /* Bitsize. */ |
| 64 | FALSE, /* PC_relative. */ |
| 65 | 0, /* Bitpos. */ |
| 66 | complain_overflow_bitfield, /* Complain on overflow. */ |
| 67 | bfd_elf_generic_reloc,/* Special Function. */ |
| 68 | "R_MICROBLAZE_32", /* Name. */ |
| 69 | FALSE, /* Partial Inplace. */ |
| 70 | 0, /* Source Mask. */ |
| 71 | 0xffffffff, /* Dest Mask. */ |
| 72 | FALSE), /* PC relative offset? */ |
| 73 | |
| 74 | /* A standard PCREL 32 bit relocation. */ |
| 75 | HOWTO (R_MICROBLAZE_32_PCREL,/* Type. */ |
| 76 | 0, /* Rightshift. */ |
| 77 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 78 | 32, /* Bitsize. */ |
| 79 | TRUE, /* PC_relative. */ |
| 80 | 0, /* Bitpos. */ |
| 81 | complain_overflow_bitfield, /* Complain on overflow. */ |
| 82 | bfd_elf_generic_reloc,/* Special Function. */ |
| 83 | "R_MICROBLAZE_32_PCREL", /* Name. */ |
| 84 | TRUE, /* Partial Inplace. */ |
| 85 | 0, /* Source Mask. */ |
| 86 | 0xffffffff, /* Dest Mask. */ |
| 87 | TRUE), /* PC relative offset? */ |
| 88 | |
| 89 | /* A 64 bit PCREL relocation. Table-entry not really used. */ |
| 90 | HOWTO (R_MICROBLAZE_64_PCREL,/* Type. */ |
| 91 | 0, /* Rightshift. */ |
| 92 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 93 | 16, /* Bitsize. */ |
| 94 | TRUE, /* PC_relative. */ |
| 95 | 0, /* Bitpos. */ |
| 96 | complain_overflow_dont, /* Complain on overflow. */ |
| 97 | bfd_elf_generic_reloc,/* Special Function. */ |
| 98 | "R_MICROBLAZE_64_PCREL", /* Name. */ |
| 99 | FALSE, /* Partial Inplace. */ |
| 100 | 0, /* Source Mask. */ |
| 101 | 0x0000ffff, /* Dest Mask. */ |
| 102 | TRUE), /* PC relative offset? */ |
| 103 | |
| 104 | /* The low half of a PCREL 32 bit relocation. */ |
| 105 | HOWTO (R_MICROBLAZE_32_PCREL_LO, /* Type. */ |
| 106 | 0, /* Rightshift. */ |
| 107 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 108 | 16, /* Bitsize. */ |
| 109 | TRUE, /* PC_relative. */ |
| 110 | 0, /* Bitpos. */ |
| 111 | complain_overflow_signed, /* Complain on overflow. */ |
| 112 | bfd_elf_generic_reloc, /* Special Function. */ |
| 113 | "R_MICROBLAZE_32_PCREL_LO", /* Name. */ |
| 114 | FALSE, /* Partial Inplace. */ |
| 115 | 0, /* Source Mask. */ |
| 116 | 0x0000ffff, /* Dest Mask. */ |
| 117 | TRUE), /* PC relative offset? */ |
| 118 | |
| 119 | /* A 64 bit relocation. Table entry not really used. */ |
| 120 | HOWTO (R_MICROBLAZE_64, /* Type. */ |
| 121 | 0, /* Rightshift. */ |
| 122 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 123 | 16, /* Bitsize. */ |
| 124 | FALSE, /* PC_relative. */ |
| 125 | 0, /* Bitpos. */ |
| 126 | complain_overflow_dont, /* Complain on overflow. */ |
| 127 | bfd_elf_generic_reloc,/* Special Function. */ |
| 128 | "R_MICROBLAZE_64", /* Name. */ |
| 129 | FALSE, /* Partial Inplace. */ |
| 130 | 0, /* Source Mask. */ |
| 131 | 0x0000ffff, /* Dest Mask. */ |
| 132 | FALSE), /* PC relative offset? */ |
| 133 | |
| 134 | /* The low half of a 32 bit relocation. */ |
| 135 | HOWTO (R_MICROBLAZE_32_LO, /* Type. */ |
| 136 | 0, /* Rightshift. */ |
| 137 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 138 | 16, /* Bitsize. */ |
| 139 | FALSE, /* PC_relative. */ |
| 140 | 0, /* Bitpos. */ |
| 141 | complain_overflow_signed, /* Complain on overflow. */ |
| 142 | bfd_elf_generic_reloc,/* Special Function. */ |
| 143 | "R_MICROBLAZE_32_LO", /* Name. */ |
| 144 | FALSE, /* Partial Inplace. */ |
| 145 | 0, /* Source Mask. */ |
| 146 | 0x0000ffff, /* Dest Mask. */ |
| 147 | FALSE), /* PC relative offset? */ |
| 148 | |
| 149 | /* Read-only small data section relocation. */ |
| 150 | HOWTO (R_MICROBLAZE_SRO32, /* Type. */ |
| 151 | 0, /* Rightshift. */ |
| 152 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 153 | 16, /* Bitsize. */ |
| 154 | FALSE, /* PC_relative. */ |
| 155 | 0, /* Bitpos. */ |
| 156 | complain_overflow_bitfield, /* Complain on overflow. */ |
| 157 | bfd_elf_generic_reloc,/* Special Function. */ |
| 158 | "R_MICROBLAZE_SRO32", /* Name. */ |
| 159 | FALSE, /* Partial Inplace. */ |
| 160 | 0, /* Source Mask. */ |
| 161 | 0x0000ffff, /* Dest Mask. */ |
| 162 | FALSE), /* PC relative offset? */ |
| 163 | |
| 164 | /* Read-write small data area relocation. */ |
| 165 | HOWTO (R_MICROBLAZE_SRW32, /* Type. */ |
| 166 | 0, /* Rightshift. */ |
| 167 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 168 | 16, /* Bitsize. */ |
| 169 | FALSE, /* PC_relative. */ |
| 170 | 0, /* Bitpos. */ |
| 171 | complain_overflow_bitfield, /* Complain on overflow. */ |
| 172 | bfd_elf_generic_reloc,/* Special Function. */ |
| 173 | "R_MICROBLAZE_SRW32", /* Name. */ |
| 174 | FALSE, /* Partial Inplace. */ |
| 175 | 0, /* Source Mask. */ |
| 176 | 0x0000ffff, /* Dest Mask. */ |
| 177 | FALSE), /* PC relative offset? */ |
| 178 | |
| 179 | /* This reloc does nothing. Used for relaxation. */ |
| 180 | HOWTO (R_MICROBLAZE_64_NONE, /* Type. */ |
| 181 | 0, /* Rightshift. */ |
| 182 | 3, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 183 | 0, /* Bitsize. */ |
| 184 | TRUE, /* PC_relative. */ |
| 185 | 0, /* Bitpos. */ |
| 186 | complain_overflow_dont, /* Complain on overflow. */ |
| 187 | NULL, /* Special Function. */ |
| 188 | "R_MICROBLAZE_64_NONE",/* Name. */ |
| 189 | FALSE, /* Partial Inplace. */ |
| 190 | 0, /* Source Mask. */ |
| 191 | 0, /* Dest Mask. */ |
| 192 | FALSE), /* PC relative offset? */ |
| 193 | |
| 194 | /* Symbol Op Symbol relocation. */ |
| 195 | HOWTO (R_MICROBLAZE_32_SYM_OP_SYM, /* Type. */ |
| 196 | 0, /* Rightshift. */ |
| 197 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 198 | 32, /* Bitsize. */ |
| 199 | FALSE, /* PC_relative. */ |
| 200 | 0, /* Bitpos. */ |
| 201 | complain_overflow_bitfield, /* Complain on overflow. */ |
| 202 | bfd_elf_generic_reloc,/* Special Function. */ |
| 203 | "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */ |
| 204 | FALSE, /* Partial Inplace. */ |
| 205 | 0, /* Source Mask. */ |
| 206 | 0xffffffff, /* Dest Mask. */ |
| 207 | FALSE), /* PC relative offset? */ |
| 208 | |
| 209 | /* GNU extension to record C++ vtable hierarchy. */ |
| 210 | HOWTO (R_MICROBLAZE_GNU_VTINHERIT, /* Type. */ |
| 211 | 0, /* Rightshift. */ |
| 212 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 213 | 0, /* Bitsize. */ |
| 214 | FALSE, /* PC_relative. */ |
| 215 | 0, /* Bitpos. */ |
| 216 | complain_overflow_dont,/* Complain on overflow. */ |
| 217 | NULL, /* Special Function. */ |
| 218 | "R_MICROBLAZE_GNU_VTINHERIT", /* Name. */ |
| 219 | FALSE, /* Partial Inplace. */ |
| 220 | 0, /* Source Mask. */ |
| 221 | 0, /* Dest Mask. */ |
| 222 | FALSE), /* PC relative offset? */ |
| 223 | |
| 224 | /* GNU extension to record C++ vtable member usage. */ |
| 225 | HOWTO (R_MICROBLAZE_GNU_VTENTRY, /* Type. */ |
| 226 | 0, /* Rightshift. */ |
| 227 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 228 | 0, /* Bitsize. */ |
| 229 | FALSE, /* PC_relative. */ |
| 230 | 0, /* Bitpos. */ |
| 231 | complain_overflow_dont,/* Complain on overflow. */ |
| 232 | _bfd_elf_rel_vtable_reloc_fn, /* Special Function. */ |
| 233 | "R_MICROBLAZE_GNU_VTENTRY", /* Name. */ |
| 234 | FALSE, /* Partial Inplace. */ |
| 235 | 0, /* Source Mask. */ |
| 236 | 0, /* Dest Mask. */ |
| 237 | FALSE), /* PC relative offset? */ |
| 238 | |
| 239 | /* A 64 bit GOTPC relocation. Table-entry not really used. */ |
| 240 | HOWTO (R_MICROBLAZE_GOTPC_64, /* Type. */ |
| 241 | 0, /* Rightshift. */ |
| 242 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 243 | 16, /* Bitsize. */ |
| 244 | TRUE, /* PC_relative. */ |
| 245 | 0, /* Bitpos. */ |
| 246 | complain_overflow_dont, /* Complain on overflow. */ |
| 247 | bfd_elf_generic_reloc, /* Special Function. */ |
| 248 | "R_MICROBLAZE_GOTPC_64", /* Name. */ |
| 249 | FALSE, /* Partial Inplace. */ |
| 250 | 0, /* Source Mask. */ |
| 251 | 0x0000ffff, /* Dest Mask. */ |
| 252 | TRUE), /* PC relative offset? */ |
| 253 | |
| 254 | /* A 64 bit TEXTPCREL relocation. Table-entry not really used. */ |
| 255 | HOWTO (R_MICROBLAZE_TEXTPCREL_64, /* Type. */ |
| 256 | 0, /* Rightshift. */ |
| 257 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 258 | 16, /* Bitsize. */ |
| 259 | TRUE, /* PC_relative. */ |
| 260 | 0, /* Bitpos. */ |
| 261 | complain_overflow_dont, /* Complain on overflow. */ |
| 262 | bfd_elf_generic_reloc, /* Special Function. */ |
| 263 | "R_MICROBLAZE_TEXTPCREL_64", /* Name. */ |
| 264 | FALSE, /* Partial Inplace. */ |
| 265 | 0, /* Source Mask. */ |
| 266 | 0x0000ffff, /* Dest Mask. */ |
| 267 | TRUE), /* PC relative offset? */ |
| 268 | |
| 269 | /* A 64 bit GOT relocation. Table-entry not really used. */ |
| 270 | HOWTO (R_MICROBLAZE_GOT_64, /* Type. */ |
| 271 | 0, /* Rightshift. */ |
| 272 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 273 | 16, /* Bitsize. */ |
| 274 | FALSE, /* PC_relative. */ |
| 275 | 0, /* Bitpos. */ |
| 276 | complain_overflow_dont, /* Complain on overflow. */ |
| 277 | bfd_elf_generic_reloc,/* Special Function. */ |
| 278 | "R_MICROBLAZE_GOT_64",/* Name. */ |
| 279 | FALSE, /* Partial Inplace. */ |
| 280 | 0, /* Source Mask. */ |
| 281 | 0x0000ffff, /* Dest Mask. */ |
| 282 | FALSE), /* PC relative offset? */ |
| 283 | |
| 284 | /* A 64 bit TEXTREL relocation. Table-entry not really used. */ |
| 285 | HOWTO (R_MICROBLAZE_TEXTREL_64, /* Type. */ |
| 286 | 0, /* Rightshift. */ |
| 287 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 288 | 16, /* Bitsize. */ |
| 289 | FALSE, /* PC_relative. */ |
| 290 | 0, /* Bitpos. */ |
| 291 | complain_overflow_dont, /* Complain on overflow. */ |
| 292 | bfd_elf_generic_reloc,/* Special Function. */ |
| 293 | "R_MICROBLAZE_TEXTREL_64",/* Name. */ |
| 294 | FALSE, /* Partial Inplace. */ |
| 295 | 0, /* Source Mask. */ |
| 296 | 0x0000ffff, /* Dest Mask. */ |
| 297 | FALSE), /* PC relative offset? */ |
| 298 | |
| 299 | /* A 64 bit PLT relocation. Table-entry not really used. */ |
| 300 | HOWTO (R_MICROBLAZE_PLT_64, /* Type. */ |
| 301 | 0, /* Rightshift. */ |
| 302 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 303 | 16, /* Bitsize. */ |
| 304 | TRUE, /* PC_relative. */ |
| 305 | 0, /* Bitpos. */ |
| 306 | complain_overflow_dont, /* Complain on overflow. */ |
| 307 | bfd_elf_generic_reloc,/* Special Function. */ |
| 308 | "R_MICROBLAZE_PLT_64",/* Name. */ |
| 309 | FALSE, /* Partial Inplace. */ |
| 310 | 0, /* Source Mask. */ |
| 311 | 0x0000ffff, /* Dest Mask. */ |
| 312 | TRUE), /* PC relative offset? */ |
| 313 | |
| 314 | /* Table-entry not really used. */ |
| 315 | HOWTO (R_MICROBLAZE_REL, /* Type. */ |
| 316 | 0, /* Rightshift. */ |
| 317 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 318 | 16, /* Bitsize. */ |
| 319 | TRUE, /* PC_relative. */ |
| 320 | 0, /* Bitpos. */ |
| 321 | complain_overflow_dont, /* Complain on overflow. */ |
| 322 | bfd_elf_generic_reloc,/* Special Function. */ |
| 323 | "R_MICROBLAZE_REL", /* Name. */ |
| 324 | FALSE, /* Partial Inplace. */ |
| 325 | 0, /* Source Mask. */ |
| 326 | 0x0000ffff, /* Dest Mask. */ |
| 327 | TRUE), /* PC relative offset? */ |
| 328 | |
| 329 | /* Table-entry not really used. */ |
| 330 | HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */ |
| 331 | 0, /* Rightshift. */ |
| 332 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 333 | 16, /* Bitsize. */ |
| 334 | TRUE, /* PC_relative. */ |
| 335 | 0, /* Bitpos. */ |
| 336 | complain_overflow_dont, /* Complain on overflow. */ |
| 337 | bfd_elf_generic_reloc,/* Special Function. */ |
| 338 | "R_MICROBLAZE_JUMP_SLOT", /* Name. */ |
| 339 | FALSE, /* Partial Inplace. */ |
| 340 | 0, /* Source Mask. */ |
| 341 | 0x0000ffff, /* Dest Mask. */ |
| 342 | TRUE), /* PC relative offset? */ |
| 343 | |
| 344 | /* Table-entry not really used. */ |
| 345 | HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */ |
| 346 | 0, /* Rightshift. */ |
| 347 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 348 | 16, /* Bitsize. */ |
| 349 | TRUE, /* PC_relative. */ |
| 350 | 0, /* Bitpos. */ |
| 351 | complain_overflow_dont, /* Complain on overflow. */ |
| 352 | bfd_elf_generic_reloc,/* Special Function. */ |
| 353 | "R_MICROBLAZE_GLOB_DAT", /* Name. */ |
| 354 | FALSE, /* Partial Inplace. */ |
| 355 | 0, /* Source Mask. */ |
| 356 | 0x0000ffff, /* Dest Mask. */ |
| 357 | TRUE), /* PC relative offset? */ |
| 358 | |
| 359 | /* A 64 bit GOT relative relocation. Table-entry not really used. */ |
| 360 | HOWTO (R_MICROBLAZE_GOTOFF_64, /* Type. */ |
| 361 | 0, /* Rightshift. */ |
| 362 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 363 | 16, /* Bitsize. */ |
| 364 | FALSE, /* PC_relative. */ |
| 365 | 0, /* Bitpos. */ |
| 366 | complain_overflow_dont, /* Complain on overflow. */ |
| 367 | bfd_elf_generic_reloc,/* Special Function. */ |
| 368 | "R_MICROBLAZE_GOTOFF_64", /* Name. */ |
| 369 | FALSE, /* Partial Inplace. */ |
| 370 | 0, /* Source Mask. */ |
| 371 | 0x0000ffff, /* Dest Mask. */ |
| 372 | FALSE), /* PC relative offset? */ |
| 373 | |
| 374 | /* A 32 bit GOT relative relocation. Table-entry not really used. */ |
| 375 | HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */ |
| 376 | 0, /* Rightshift. */ |
| 377 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 378 | 16, /* Bitsize. */ |
| 379 | FALSE, /* PC_relative. */ |
| 380 | 0, /* Bitpos. */ |
| 381 | complain_overflow_dont, /* Complain on overflow. */ |
| 382 | bfd_elf_generic_reloc, /* Special Function. */ |
| 383 | "R_MICROBLAZE_GOTOFF_32", /* Name. */ |
| 384 | FALSE, /* Partial Inplace. */ |
| 385 | 0, /* Source Mask. */ |
| 386 | 0x0000ffff, /* Dest Mask. */ |
| 387 | FALSE), /* PC relative offset? */ |
| 388 | |
| 389 | /* COPY relocation. Table-entry not really used. */ |
| 390 | HOWTO (R_MICROBLAZE_COPY, /* Type. */ |
| 391 | 0, /* Rightshift. */ |
| 392 | 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 393 | 16, /* Bitsize. */ |
| 394 | FALSE, /* PC_relative. */ |
| 395 | 0, /* Bitpos. */ |
| 396 | complain_overflow_dont, /* Complain on overflow. */ |
| 397 | bfd_elf_generic_reloc,/* Special Function. */ |
| 398 | "R_MICROBLAZE_COPY", /* Name. */ |
| 399 | FALSE, /* Partial Inplace. */ |
| 400 | 0, /* Source Mask. */ |
| 401 | 0x0000ffff, /* Dest Mask. */ |
| 402 | FALSE), /* PC relative offset? */ |
| 403 | |
| 404 | /* Marker relocs for TLS. */ |
| 405 | HOWTO (R_MICROBLAZE_TLS, |
| 406 | 0, /* rightshift */ |
| 407 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 408 | 32, /* bitsize */ |
| 409 | FALSE, /* pc_relative */ |
| 410 | 0, /* bitpos */ |
| 411 | complain_overflow_dont, /* complain_on_overflow */ |
| 412 | bfd_elf_generic_reloc, /* special_function */ |
| 413 | "R_MICROBLAZE_TLS", /* name */ |
| 414 | FALSE, /* partial_inplace */ |
| 415 | 0, /* src_mask */ |
| 416 | 0x0000ffff, /* dst_mask */ |
| 417 | FALSE), /* pcrel_offset */ |
| 418 | |
| 419 | HOWTO (R_MICROBLAZE_TLSGD, |
| 420 | 0, /* rightshift */ |
| 421 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 422 | 32, /* bitsize */ |
| 423 | FALSE, /* pc_relative */ |
| 424 | 0, /* bitpos */ |
| 425 | complain_overflow_dont, /* complain_on_overflow */ |
| 426 | bfd_elf_generic_reloc, /* special_function */ |
| 427 | "R_MICROBLAZE_TLSGD", /* name */ |
| 428 | FALSE, /* partial_inplace */ |
| 429 | 0, /* src_mask */ |
| 430 | 0x0000ffff, /* dst_mask */ |
| 431 | FALSE), /* pcrel_offset */ |
| 432 | |
| 433 | HOWTO (R_MICROBLAZE_TLSLD, |
| 434 | 0, /* rightshift */ |
| 435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 436 | 32, /* bitsize */ |
| 437 | FALSE, /* pc_relative */ |
| 438 | 0, /* bitpos */ |
| 439 | complain_overflow_dont, /* complain_on_overflow */ |
| 440 | bfd_elf_generic_reloc, /* special_function */ |
| 441 | "R_MICROBLAZE_TLSLD", /* name */ |
| 442 | FALSE, /* partial_inplace */ |
| 443 | 0, /* src_mask */ |
| 444 | 0x0000ffff, /* dst_mask */ |
| 445 | FALSE), /* pcrel_offset */ |
| 446 | |
| 447 | /* Computes the load module index of the load module that contains the |
| 448 | definition of its TLS sym. */ |
| 449 | HOWTO (R_MICROBLAZE_TLSDTPMOD32, |
| 450 | 0, /* rightshift */ |
| 451 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 452 | 32, /* bitsize */ |
| 453 | FALSE, /* pc_relative */ |
| 454 | 0, /* bitpos */ |
| 455 | complain_overflow_dont, /* complain_on_overflow */ |
| 456 | bfd_elf_generic_reloc, /* special_function */ |
| 457 | "R_MICROBLAZE_TLSDTPMOD32", /* name */ |
| 458 | FALSE, /* partial_inplace */ |
| 459 | 0, /* src_mask */ |
| 460 | 0x0000ffff, /* dst_mask */ |
| 461 | FALSE), /* pcrel_offset */ |
| 462 | |
| 463 | /* Computes a dtv-relative displacement, the difference between the value |
| 464 | of sym+add and the base address of the thread-local storage block that |
| 465 | contains the definition of sym, minus 0x8000. Used for initializing GOT */ |
| 466 | HOWTO (R_MICROBLAZE_TLSDTPREL32, |
| 467 | 0, /* rightshift */ |
| 468 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 469 | 32, /* bitsize */ |
| 470 | FALSE, /* pc_relative */ |
| 471 | 0, /* bitpos */ |
| 472 | complain_overflow_dont, /* complain_on_overflow */ |
| 473 | bfd_elf_generic_reloc, /* special_function */ |
| 474 | "R_MICROBLAZE_TLSDTPREL32", /* name */ |
| 475 | FALSE, /* partial_inplace */ |
| 476 | 0, /* src_mask */ |
| 477 | 0x0000ffff, /* dst_mask */ |
| 478 | FALSE), /* pcrel_offset */ |
| 479 | |
| 480 | /* Computes a dtv-relative displacement, the difference between the value |
| 481 | of sym+add and the base address of the thread-local storage block that |
| 482 | contains the definition of sym, minus 0x8000. */ |
| 483 | HOWTO (R_MICROBLAZE_TLSDTPREL64, |
| 484 | 0, /* rightshift */ |
| 485 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 486 | 32, /* bitsize */ |
| 487 | FALSE, /* pc_relative */ |
| 488 | 0, /* bitpos */ |
| 489 | complain_overflow_dont, /* complain_on_overflow */ |
| 490 | bfd_elf_generic_reloc, /* special_function */ |
| 491 | "R_MICROBLAZE_TLSDTPREL64", /* name */ |
| 492 | FALSE, /* partial_inplace */ |
| 493 | 0, /* src_mask */ |
| 494 | 0x0000ffff, /* dst_mask */ |
| 495 | FALSE), /* pcrel_offset */ |
| 496 | |
| 497 | /* Computes a tp-relative displacement, the difference between the value of |
| 498 | sym+add and the value of the thread pointer (r13). */ |
| 499 | HOWTO (R_MICROBLAZE_TLSGOTTPREL32, |
| 500 | 0, /* rightshift */ |
| 501 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 502 | 32, /* bitsize */ |
| 503 | FALSE, /* pc_relative */ |
| 504 | 0, /* bitpos */ |
| 505 | complain_overflow_dont, /* complain_on_overflow */ |
| 506 | bfd_elf_generic_reloc, /* special_function */ |
| 507 | "R_MICROBLAZE_TLSGOTTPREL32", /* name */ |
| 508 | FALSE, /* partial_inplace */ |
| 509 | 0, /* src_mask */ |
| 510 | 0x0000ffff, /* dst_mask */ |
| 511 | FALSE), /* pcrel_offset */ |
| 512 | |
| 513 | /* Computes a tp-relative displacement, the difference between the value of |
| 514 | sym+add and the value of the thread pointer (r13). */ |
| 515 | HOWTO (R_MICROBLAZE_TLSTPREL32, |
| 516 | 0, /* rightshift */ |
| 517 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 518 | 32, /* bitsize */ |
| 519 | FALSE, /* pc_relative */ |
| 520 | 0, /* bitpos */ |
| 521 | complain_overflow_dont, /* complain_on_overflow */ |
| 522 | bfd_elf_generic_reloc, /* special_function */ |
| 523 | "R_MICROBLAZE_TLSTPREL32", /* name */ |
| 524 | FALSE, /* partial_inplace */ |
| 525 | 0, /* src_mask */ |
| 526 | 0x0000ffff, /* dst_mask */ |
| 527 | FALSE), /* pcrel_offset */ |
| 528 | |
| 529 | }; |
| 530 | |
| 531 | #ifndef NUM_ELEM |
| 532 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) |
| 533 | #endif |
| 534 | \f |
| 535 | /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */ |
| 536 | |
| 537 | static void |
| 538 | microblaze_elf_howto_init (void) |
| 539 | { |
| 540 | unsigned int i; |
| 541 | |
| 542 | for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;) |
| 543 | { |
| 544 | unsigned int type; |
| 545 | |
| 546 | type = microblaze_elf_howto_raw[i].type; |
| 547 | |
| 548 | BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table)); |
| 549 | |
| 550 | microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i]; |
| 551 | } |
| 552 | } |
| 553 | \f |
| 554 | static reloc_howto_type * |
| 555 | microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 556 | bfd_reloc_code_real_type code) |
| 557 | { |
| 558 | enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE; |
| 559 | |
| 560 | switch (code) |
| 561 | { |
| 562 | case BFD_RELOC_NONE: |
| 563 | microblaze_reloc = R_MICROBLAZE_NONE; |
| 564 | break; |
| 565 | case BFD_RELOC_MICROBLAZE_64_NONE: |
| 566 | microblaze_reloc = R_MICROBLAZE_64_NONE; |
| 567 | break; |
| 568 | case BFD_RELOC_32: |
| 569 | microblaze_reloc = R_MICROBLAZE_32; |
| 570 | break; |
| 571 | /* RVA is treated the same as 32 */ |
| 572 | case BFD_RELOC_RVA: |
| 573 | microblaze_reloc = R_MICROBLAZE_32; |
| 574 | break; |
| 575 | case BFD_RELOC_32_PCREL: |
| 576 | microblaze_reloc = R_MICROBLAZE_32_PCREL; |
| 577 | break; |
| 578 | case BFD_RELOC_64_PCREL: |
| 579 | microblaze_reloc = R_MICROBLAZE_64_PCREL; |
| 580 | break; |
| 581 | case BFD_RELOC_MICROBLAZE_32_LO_PCREL: |
| 582 | microblaze_reloc = R_MICROBLAZE_32_PCREL_LO; |
| 583 | break; |
| 584 | case BFD_RELOC_64: |
| 585 | microblaze_reloc = R_MICROBLAZE_64; |
| 586 | break; |
| 587 | case BFD_RELOC_MICROBLAZE_32_LO: |
| 588 | microblaze_reloc = R_MICROBLAZE_32_LO; |
| 589 | break; |
| 590 | case BFD_RELOC_MICROBLAZE_32_ROSDA: |
| 591 | microblaze_reloc = R_MICROBLAZE_SRO32; |
| 592 | break; |
| 593 | case BFD_RELOC_MICROBLAZE_32_RWSDA: |
| 594 | microblaze_reloc = R_MICROBLAZE_SRW32; |
| 595 | break; |
| 596 | case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM: |
| 597 | microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM; |
| 598 | break; |
| 599 | case BFD_RELOC_VTABLE_INHERIT: |
| 600 | microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT; |
| 601 | break; |
| 602 | case BFD_RELOC_VTABLE_ENTRY: |
| 603 | microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY; |
| 604 | break; |
| 605 | case BFD_RELOC_MICROBLAZE_64_GOTPC: |
| 606 | microblaze_reloc = R_MICROBLAZE_GOTPC_64; |
| 607 | break; |
| 608 | case BFD_RELOC_MICROBLAZE_64_GOT: |
| 609 | microblaze_reloc = R_MICROBLAZE_GOT_64; |
| 610 | break; |
| 611 | case BFD_RELOC_MICROBLAZE_64_TEXTPCREL: |
| 612 | microblaze_reloc = R_MICROBLAZE_TEXTPCREL_64; |
| 613 | break; |
| 614 | case BFD_RELOC_MICROBLAZE_64_TEXTREL: |
| 615 | microblaze_reloc = R_MICROBLAZE_TEXTREL_64; |
| 616 | break; |
| 617 | case BFD_RELOC_MICROBLAZE_64_PLT: |
| 618 | microblaze_reloc = R_MICROBLAZE_PLT_64; |
| 619 | break; |
| 620 | case BFD_RELOC_MICROBLAZE_64_GOTOFF: |
| 621 | microblaze_reloc = R_MICROBLAZE_GOTOFF_64; |
| 622 | break; |
| 623 | case BFD_RELOC_MICROBLAZE_32_GOTOFF: |
| 624 | microblaze_reloc = R_MICROBLAZE_GOTOFF_32; |
| 625 | break; |
| 626 | case BFD_RELOC_MICROBLAZE_64_TLSGD: |
| 627 | microblaze_reloc = R_MICROBLAZE_TLSGD; |
| 628 | break; |
| 629 | case BFD_RELOC_MICROBLAZE_64_TLSLD: |
| 630 | microblaze_reloc = R_MICROBLAZE_TLSLD; |
| 631 | break; |
| 632 | case BFD_RELOC_MICROBLAZE_32_TLSDTPREL: |
| 633 | microblaze_reloc = R_MICROBLAZE_TLSDTPREL32; |
| 634 | break; |
| 635 | case BFD_RELOC_MICROBLAZE_64_TLSDTPREL: |
| 636 | microblaze_reloc = R_MICROBLAZE_TLSDTPREL64; |
| 637 | break; |
| 638 | case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD: |
| 639 | microblaze_reloc = R_MICROBLAZE_TLSDTPMOD32; |
| 640 | break; |
| 641 | case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL: |
| 642 | microblaze_reloc = R_MICROBLAZE_TLSGOTTPREL32; |
| 643 | break; |
| 644 | case BFD_RELOC_MICROBLAZE_64_TLSTPREL: |
| 645 | microblaze_reloc = R_MICROBLAZE_TLSTPREL32; |
| 646 | break; |
| 647 | case BFD_RELOC_MICROBLAZE_COPY: |
| 648 | microblaze_reloc = R_MICROBLAZE_COPY; |
| 649 | break; |
| 650 | default: |
| 651 | return (reloc_howto_type *) NULL; |
| 652 | } |
| 653 | |
| 654 | if (!microblaze_elf_howto_table [R_MICROBLAZE_32]) |
| 655 | /* Initialize howto table if needed. */ |
| 656 | microblaze_elf_howto_init (); |
| 657 | |
| 658 | return microblaze_elf_howto_table [(int) microblaze_reloc]; |
| 659 | }; |
| 660 | |
| 661 | static reloc_howto_type * |
| 662 | microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 663 | const char *r_name) |
| 664 | { |
| 665 | unsigned int i; |
| 666 | |
| 667 | for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++) |
| 668 | if (microblaze_elf_howto_raw[i].name != NULL |
| 669 | && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0) |
| 670 | return µblaze_elf_howto_raw[i]; |
| 671 | |
| 672 | return NULL; |
| 673 | } |
| 674 | |
| 675 | /* Set the howto pointer for a RCE ELF reloc. */ |
| 676 | |
| 677 | static bfd_boolean |
| 678 | microblaze_elf_info_to_howto (bfd * abfd, |
| 679 | arelent * cache_ptr, |
| 680 | Elf_Internal_Rela * dst) |
| 681 | { |
| 682 | unsigned int r_type; |
| 683 | |
| 684 | if (!microblaze_elf_howto_table [R_MICROBLAZE_32]) |
| 685 | /* Initialize howto table if needed. */ |
| 686 | microblaze_elf_howto_init (); |
| 687 | |
| 688 | r_type = ELF32_R_TYPE (dst->r_info); |
| 689 | if (r_type >= R_MICROBLAZE_max) |
| 690 | { |
| 691 | /* xgettext:c-format */ |
| 692 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 693 | abfd, r_type); |
| 694 | bfd_set_error (bfd_error_bad_value); |
| 695 | return FALSE; |
| 696 | } |
| 697 | |
| 698 | cache_ptr->howto = microblaze_elf_howto_table [r_type]; |
| 699 | return TRUE; |
| 700 | } |
| 701 | |
| 702 | /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */ |
| 703 | |
| 704 | static bfd_boolean |
| 705 | microblaze_elf_is_local_label_name (bfd *abfd, const char *name) |
| 706 | { |
| 707 | if (name[0] == 'L' && name[1] == '.') |
| 708 | return TRUE; |
| 709 | |
| 710 | if (name[0] == '$' && name[1] == 'L') |
| 711 | return TRUE; |
| 712 | |
| 713 | /* With gcc, the labels go back to starting with '.', so we accept |
| 714 | the generic ELF local label syntax as well. */ |
| 715 | return _bfd_elf_is_local_label_name (abfd, name); |
| 716 | } |
| 717 | |
| 718 | /* ELF linker hash entry. */ |
| 719 | |
| 720 | struct elf32_mb_link_hash_entry |
| 721 | { |
| 722 | struct elf_link_hash_entry elf; |
| 723 | |
| 724 | /* TLS Reference Types for the symbol; Updated by check_relocs */ |
| 725 | #define TLS_GD 1 /* GD reloc. */ |
| 726 | #define TLS_LD 2 /* LD reloc. */ |
| 727 | #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| 728 | #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| 729 | #define TLS_TLS 16 /* Any TLS reloc. */ |
| 730 | unsigned char tls_mask; |
| 731 | |
| 732 | }; |
| 733 | |
| 734 | #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD)) |
| 735 | #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD)) |
| 736 | #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL)) |
| 737 | #define IS_TLS_NONE(x) (x == 0) |
| 738 | |
| 739 | #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent)) |
| 740 | |
| 741 | /* ELF linker hash table. */ |
| 742 | |
| 743 | struct elf32_mb_link_hash_table |
| 744 | { |
| 745 | struct elf_link_hash_table elf; |
| 746 | |
| 747 | /* Small local sym to section mapping cache. */ |
| 748 | struct sym_cache sym_sec; |
| 749 | |
| 750 | /* TLS Local Dynamic GOT Entry */ |
| 751 | union { |
| 752 | bfd_signed_vma refcount; |
| 753 | bfd_vma offset; |
| 754 | } tlsld_got; |
| 755 | }; |
| 756 | |
| 757 | /* Nonzero if this section has TLS related relocations. */ |
| 758 | #define has_tls_reloc sec_flg0 |
| 759 | |
| 760 | /* Get the ELF linker hash table from a link_info structure. */ |
| 761 | |
| 762 | #define elf32_mb_hash_table(p) \ |
| 763 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 764 | == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL) |
| 765 | |
| 766 | /* Create an entry in a microblaze ELF linker hash table. */ |
| 767 | |
| 768 | static struct bfd_hash_entry * |
| 769 | link_hash_newfunc (struct bfd_hash_entry *entry, |
| 770 | struct bfd_hash_table *table, |
| 771 | const char *string) |
| 772 | { |
| 773 | /* Allocate the structure if it has not already been allocated by a |
| 774 | subclass. */ |
| 775 | if (entry == NULL) |
| 776 | { |
| 777 | entry = bfd_hash_allocate (table, |
| 778 | sizeof (struct elf32_mb_link_hash_entry)); |
| 779 | if (entry == NULL) |
| 780 | return entry; |
| 781 | } |
| 782 | |
| 783 | /* Call the allocation method of the superclass. */ |
| 784 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 785 | if (entry != NULL) |
| 786 | { |
| 787 | struct elf32_mb_link_hash_entry *eh; |
| 788 | |
| 789 | eh = (struct elf32_mb_link_hash_entry *) entry; |
| 790 | eh->tls_mask = 0; |
| 791 | } |
| 792 | |
| 793 | return entry; |
| 794 | } |
| 795 | |
| 796 | /* Create a mb ELF linker hash table. */ |
| 797 | |
| 798 | static struct bfd_link_hash_table * |
| 799 | microblaze_elf_link_hash_table_create (bfd *abfd) |
| 800 | { |
| 801 | struct elf32_mb_link_hash_table *ret; |
| 802 | size_t amt = sizeof (struct elf32_mb_link_hash_table); |
| 803 | |
| 804 | ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt); |
| 805 | if (ret == NULL) |
| 806 | return NULL; |
| 807 | |
| 808 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
| 809 | sizeof (struct elf32_mb_link_hash_entry), |
| 810 | MICROBLAZE_ELF_DATA)) |
| 811 | { |
| 812 | free (ret); |
| 813 | return NULL; |
| 814 | } |
| 815 | |
| 816 | return &ret->elf.root; |
| 817 | } |
| 818 | \f |
| 819 | /* Set the values of the small data pointers. */ |
| 820 | |
| 821 | static void |
| 822 | microblaze_elf_final_sdp (struct bfd_link_info *info) |
| 823 | { |
| 824 | struct bfd_link_hash_entry *h; |
| 825 | |
| 826 | h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE); |
| 827 | if (h != (struct bfd_link_hash_entry *) NULL |
| 828 | && h->type == bfd_link_hash_defined) |
| 829 | ro_small_data_pointer = (h->u.def.value |
| 830 | + h->u.def.section->output_section->vma |
| 831 | + h->u.def.section->output_offset); |
| 832 | |
| 833 | h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE); |
| 834 | if (h != (struct bfd_link_hash_entry *) NULL |
| 835 | && h->type == bfd_link_hash_defined) |
| 836 | rw_small_data_pointer = (h->u.def.value |
| 837 | + h->u.def.section->output_section->vma |
| 838 | + h->u.def.section->output_offset); |
| 839 | } |
| 840 | |
| 841 | static bfd_vma |
| 842 | dtprel_base (struct bfd_link_info *info) |
| 843 | { |
| 844 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 845 | if (elf_hash_table (info)->tls_sec == NULL) |
| 846 | return 0; |
| 847 | return elf_hash_table (info)->tls_sec->vma; |
| 848 | } |
| 849 | |
| 850 | /* The size of the thread control block. */ |
| 851 | #define TCB_SIZE 8 |
| 852 | |
| 853 | /* Output a simple dynamic relocation into SRELOC. */ |
| 854 | |
| 855 | static void |
| 856 | microblaze_elf_output_dynamic_relocation (bfd *output_bfd, |
| 857 | asection *sreloc, |
| 858 | unsigned long reloc_index, |
| 859 | unsigned long indx, |
| 860 | int r_type, |
| 861 | bfd_vma offset, |
| 862 | bfd_vma addend) |
| 863 | { |
| 864 | |
| 865 | Elf_Internal_Rela rel; |
| 866 | |
| 867 | rel.r_info = ELF32_R_INFO (indx, r_type); |
| 868 | rel.r_offset = offset; |
| 869 | rel.r_addend = addend; |
| 870 | |
| 871 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 872 | (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela))); |
| 873 | } |
| 874 | |
| 875 | /* This code is taken from elf32-m32r.c |
| 876 | There is some attempt to make this function usable for many architectures, |
| 877 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], |
| 878 | if only to serve as a learning tool. |
| 879 | |
| 880 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 881 | to handle the relocations for a section. |
| 882 | |
| 883 | The relocs are always passed as Rela structures; if the section |
| 884 | actually uses Rel structures, the r_addend field will always be |
| 885 | zero. |
| 886 | |
| 887 | This function is responsible for adjust the section contents as |
| 888 | necessary, and (if using Rela relocs and generating a |
| 889 | relocatable output file) adjusting the reloc addend as |
| 890 | necessary. |
| 891 | |
| 892 | This function does not have to worry about setting the reloc |
| 893 | address or the reloc symbol index. |
| 894 | |
| 895 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 896 | |
| 897 | LOCAL_SECTIONS is an array giving the section in the input file |
| 898 | corresponding to the st_shndx field of each local symbol. |
| 899 | |
| 900 | The global hash table entry for the global symbols can be found |
| 901 | via elf_sym_hashes (input_bfd). |
| 902 | |
| 903 | When generating relocatable output, this function must handle |
| 904 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 905 | going to be the section symbol corresponding to the output |
| 906 | section, which means that the addend must be adjusted |
| 907 | accordingly. */ |
| 908 | |
| 909 | static bfd_boolean |
| 910 | microblaze_elf_relocate_section (bfd *output_bfd, |
| 911 | struct bfd_link_info *info, |
| 912 | bfd *input_bfd, |
| 913 | asection *input_section, |
| 914 | bfd_byte *contents, |
| 915 | Elf_Internal_Rela *relocs, |
| 916 | Elf_Internal_Sym *local_syms, |
| 917 | asection **local_sections) |
| 918 | { |
| 919 | struct elf32_mb_link_hash_table *htab; |
| 920 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 921 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 922 | Elf_Internal_Rela *rel, *relend; |
| 923 | int endian = (bfd_little_endian (output_bfd)) ? 0 : 2; |
| 924 | /* Assume success. */ |
| 925 | bfd_boolean ret = TRUE; |
| 926 | asection *sreloc; |
| 927 | bfd_vma *local_got_offsets; |
| 928 | unsigned int tls_type; |
| 929 | |
| 930 | if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1]) |
| 931 | microblaze_elf_howto_init (); |
| 932 | |
| 933 | htab = elf32_mb_hash_table (info); |
| 934 | if (htab == NULL) |
| 935 | return FALSE; |
| 936 | |
| 937 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 938 | |
| 939 | sreloc = elf_section_data (input_section)->sreloc; |
| 940 | |
| 941 | rel = relocs; |
| 942 | relend = relocs + input_section->reloc_count; |
| 943 | for (; rel < relend; rel++) |
| 944 | { |
| 945 | int r_type; |
| 946 | reloc_howto_type *howto; |
| 947 | unsigned long r_symndx; |
| 948 | bfd_vma addend = rel->r_addend; |
| 949 | bfd_vma offset = rel->r_offset; |
| 950 | struct elf_link_hash_entry *h; |
| 951 | Elf_Internal_Sym *sym; |
| 952 | asection *sec; |
| 953 | const char *sym_name; |
| 954 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 955 | const char *errmsg = NULL; |
| 956 | bfd_boolean unresolved_reloc = FALSE; |
| 957 | |
| 958 | h = NULL; |
| 959 | r_type = ELF32_R_TYPE (rel->r_info); |
| 960 | tls_type = 0; |
| 961 | |
| 962 | if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max) |
| 963 | { |
| 964 | /* xgettext:c-format */ |
| 965 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 966 | input_bfd, (int) r_type); |
| 967 | bfd_set_error (bfd_error_bad_value); |
| 968 | ret = FALSE; |
| 969 | continue; |
| 970 | } |
| 971 | |
| 972 | howto = microblaze_elf_howto_table[r_type]; |
| 973 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 974 | |
| 975 | if (bfd_link_relocatable (info)) |
| 976 | { |
| 977 | /* This is a relocatable link. We don't have to change |
| 978 | anything, unless the reloc is against a section symbol, |
| 979 | in which case we have to adjust according to where the |
| 980 | section symbol winds up in the output section. */ |
| 981 | sec = NULL; |
| 982 | if (r_symndx >= symtab_hdr->sh_info) |
| 983 | /* External symbol. */ |
| 984 | continue; |
| 985 | |
| 986 | /* Local symbol. */ |
| 987 | sym = local_syms + r_symndx; |
| 988 | sym_name = "<local symbol>"; |
| 989 | /* STT_SECTION: symbol is associated with a section. */ |
| 990 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 991 | /* Symbol isn't associated with a section. Nothing to do. */ |
| 992 | continue; |
| 993 | |
| 994 | sec = local_sections[r_symndx]; |
| 995 | addend += sec->output_offset + sym->st_value; |
| 996 | #ifndef USE_REL |
| 997 | /* This can't be done for USE_REL because it doesn't mean anything |
| 998 | and elf_link_input_bfd asserts this stays zero. */ |
| 999 | /* rel->r_addend = addend; */ |
| 1000 | #endif |
| 1001 | |
| 1002 | #ifndef USE_REL |
| 1003 | /* Addends are stored with relocs. We're done. */ |
| 1004 | continue; |
| 1005 | #else /* USE_REL */ |
| 1006 | /* If partial_inplace, we need to store any additional addend |
| 1007 | back in the section. */ |
| 1008 | if (!howto->partial_inplace) |
| 1009 | continue; |
| 1010 | /* ??? Here is a nice place to call a special_function like handler. */ |
| 1011 | r = _bfd_relocate_contents (howto, input_bfd, addend, |
| 1012 | contents + offset); |
| 1013 | #endif /* USE_REL */ |
| 1014 | } |
| 1015 | else |
| 1016 | { |
| 1017 | bfd_vma relocation; |
| 1018 | bfd_boolean resolved_to_zero; |
| 1019 | |
| 1020 | /* This is a final link. */ |
| 1021 | sym = NULL; |
| 1022 | sec = NULL; |
| 1023 | unresolved_reloc = FALSE; |
| 1024 | |
| 1025 | if (r_symndx < symtab_hdr->sh_info) |
| 1026 | { |
| 1027 | /* Local symbol. */ |
| 1028 | sym = local_syms + r_symndx; |
| 1029 | sec = local_sections[r_symndx]; |
| 1030 | if (sec == 0) |
| 1031 | continue; |
| 1032 | sym_name = "<local symbol>"; |
| 1033 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1034 | /* r_addend may have changed if the reference section was |
| 1035 | a merge section. */ |
| 1036 | addend = rel->r_addend; |
| 1037 | } |
| 1038 | else |
| 1039 | { |
| 1040 | /* External symbol. */ |
| 1041 | bfd_boolean warned ATTRIBUTE_UNUSED; |
| 1042 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
| 1043 | |
| 1044 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1045 | r_symndx, symtab_hdr, sym_hashes, |
| 1046 | h, sec, relocation, |
| 1047 | unresolved_reloc, warned, ignored); |
| 1048 | sym_name = h->root.root.string; |
| 1049 | } |
| 1050 | |
| 1051 | /* Sanity check the address. */ |
| 1052 | if (offset > bfd_get_section_limit (input_bfd, input_section)) |
| 1053 | { |
| 1054 | r = bfd_reloc_outofrange; |
| 1055 | goto check_reloc; |
| 1056 | } |
| 1057 | |
| 1058 | resolved_to_zero = (h != NULL |
| 1059 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
| 1060 | |
| 1061 | switch ((int) r_type) |
| 1062 | { |
| 1063 | case (int) R_MICROBLAZE_SRO32 : |
| 1064 | { |
| 1065 | const char *name; |
| 1066 | |
| 1067 | /* Only relocate if the symbol is defined. */ |
| 1068 | if (sec) |
| 1069 | { |
| 1070 | name = bfd_section_name (sec); |
| 1071 | |
| 1072 | if (strcmp (name, ".sdata2") == 0 |
| 1073 | || strcmp (name, ".sbss2") == 0) |
| 1074 | { |
| 1075 | if (ro_small_data_pointer == 0) |
| 1076 | microblaze_elf_final_sdp (info); |
| 1077 | if (ro_small_data_pointer == 0) |
| 1078 | { |
| 1079 | ret = FALSE; |
| 1080 | r = bfd_reloc_undefined; |
| 1081 | goto check_reloc; |
| 1082 | } |
| 1083 | |
| 1084 | /* At this point `relocation' contains the object's |
| 1085 | address. */ |
| 1086 | relocation -= ro_small_data_pointer; |
| 1087 | /* Now it contains the offset from _SDA2_BASE_. */ |
| 1088 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 1089 | input_section, |
| 1090 | contents, offset, |
| 1091 | relocation, addend); |
| 1092 | } |
| 1093 | else |
| 1094 | { |
| 1095 | _bfd_error_handler |
| 1096 | /* xgettext:c-format */ |
| 1097 | (_("%pB: the target (%s) of an %s relocation" |
| 1098 | " is in the wrong section (%pA)"), |
| 1099 | input_bfd, |
| 1100 | sym_name, |
| 1101 | microblaze_elf_howto_table[(int) r_type]->name, |
| 1102 | sec); |
| 1103 | /*bfd_set_error (bfd_error_bad_value); ??? why? */ |
| 1104 | ret = FALSE; |
| 1105 | continue; |
| 1106 | } |
| 1107 | } |
| 1108 | } |
| 1109 | break; |
| 1110 | |
| 1111 | case (int) R_MICROBLAZE_SRW32 : |
| 1112 | { |
| 1113 | const char *name; |
| 1114 | |
| 1115 | /* Only relocate if the symbol is defined. */ |
| 1116 | if (sec) |
| 1117 | { |
| 1118 | name = bfd_section_name (sec); |
| 1119 | |
| 1120 | if (strcmp (name, ".sdata") == 0 |
| 1121 | || strcmp (name, ".sbss") == 0) |
| 1122 | { |
| 1123 | if (rw_small_data_pointer == 0) |
| 1124 | microblaze_elf_final_sdp (info); |
| 1125 | if (rw_small_data_pointer == 0) |
| 1126 | { |
| 1127 | ret = FALSE; |
| 1128 | r = bfd_reloc_undefined; |
| 1129 | goto check_reloc; |
| 1130 | } |
| 1131 | |
| 1132 | /* At this point `relocation' contains the object's |
| 1133 | address. */ |
| 1134 | relocation -= rw_small_data_pointer; |
| 1135 | /* Now it contains the offset from _SDA_BASE_. */ |
| 1136 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 1137 | input_section, |
| 1138 | contents, offset, |
| 1139 | relocation, addend); |
| 1140 | } |
| 1141 | else |
| 1142 | { |
| 1143 | _bfd_error_handler |
| 1144 | /* xgettext:c-format */ |
| 1145 | (_("%pB: the target (%s) of an %s relocation" |
| 1146 | " is in the wrong section (%pA)"), |
| 1147 | input_bfd, |
| 1148 | sym_name, |
| 1149 | microblaze_elf_howto_table[(int) r_type]->name, |
| 1150 | sec); |
| 1151 | /*bfd_set_error (bfd_error_bad_value); ??? why? */ |
| 1152 | ret = FALSE; |
| 1153 | continue; |
| 1154 | } |
| 1155 | } |
| 1156 | } |
| 1157 | break; |
| 1158 | |
| 1159 | case (int) R_MICROBLAZE_32_SYM_OP_SYM: |
| 1160 | break; /* Do nothing. */ |
| 1161 | |
| 1162 | case (int) R_MICROBLAZE_GOTPC_64: |
| 1163 | relocation = (htab->elf.sgotplt->output_section->vma |
| 1164 | + htab->elf.sgotplt->output_offset); |
| 1165 | relocation -= (input_section->output_section->vma |
| 1166 | + input_section->output_offset |
| 1167 | + offset + INST_WORD_SIZE); |
| 1168 | relocation += addend; |
| 1169 | bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, |
| 1170 | contents + offset + endian); |
| 1171 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1172 | contents + offset + endian + INST_WORD_SIZE); |
| 1173 | break; |
| 1174 | |
| 1175 | case (int) R_MICROBLAZE_TEXTPCREL_64: |
| 1176 | relocation = input_section->output_section->vma; |
| 1177 | relocation -= (input_section->output_section->vma |
| 1178 | + input_section->output_offset |
| 1179 | + offset + INST_WORD_SIZE); |
| 1180 | relocation += addend; |
| 1181 | bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, |
| 1182 | contents + offset + endian); |
| 1183 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1184 | contents + offset + endian + INST_WORD_SIZE); |
| 1185 | break; |
| 1186 | |
| 1187 | case (int) R_MICROBLAZE_PLT_64: |
| 1188 | { |
| 1189 | bfd_vma immediate; |
| 1190 | if (htab->elf.splt != NULL && h != NULL |
| 1191 | && h->plt.offset != (bfd_vma) -1) |
| 1192 | { |
| 1193 | relocation = (htab->elf.splt->output_section->vma |
| 1194 | + htab->elf.splt->output_offset |
| 1195 | + h->plt.offset); |
| 1196 | unresolved_reloc = FALSE; |
| 1197 | immediate = relocation - (input_section->output_section->vma |
| 1198 | + input_section->output_offset |
| 1199 | + offset + INST_WORD_SIZE); |
| 1200 | bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff, |
| 1201 | contents + offset + endian); |
| 1202 | bfd_put_16 (input_bfd, immediate & 0xffff, |
| 1203 | contents + offset + endian + INST_WORD_SIZE); |
| 1204 | } |
| 1205 | else |
| 1206 | { |
| 1207 | relocation -= (input_section->output_section->vma |
| 1208 | + input_section->output_offset |
| 1209 | + offset + INST_WORD_SIZE); |
| 1210 | immediate = relocation; |
| 1211 | bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff, |
| 1212 | contents + offset + endian); |
| 1213 | bfd_put_16 (input_bfd, immediate & 0xffff, |
| 1214 | contents + offset + endian + INST_WORD_SIZE); |
| 1215 | } |
| 1216 | break; |
| 1217 | } |
| 1218 | |
| 1219 | case (int) R_MICROBLAZE_TLSGD: |
| 1220 | tls_type = (TLS_TLS | TLS_GD); |
| 1221 | goto dogot; |
| 1222 | case (int) R_MICROBLAZE_TLSLD: |
| 1223 | tls_type = (TLS_TLS | TLS_LD); |
| 1224 | /* Fall through. */ |
| 1225 | dogot: |
| 1226 | case (int) R_MICROBLAZE_GOT_64: |
| 1227 | { |
| 1228 | bfd_vma *offp; |
| 1229 | bfd_vma off, off2; |
| 1230 | unsigned long indx; |
| 1231 | bfd_vma static_value; |
| 1232 | |
| 1233 | bfd_boolean need_relocs = FALSE; |
| 1234 | if (htab->elf.sgot == NULL) |
| 1235 | abort (); |
| 1236 | |
| 1237 | indx = 0; |
| 1238 | offp = NULL; |
| 1239 | |
| 1240 | /* 1. Identify GOT Offset; |
| 1241 | 2. Compute Static Values |
| 1242 | 3. Process Module Id, Process Offset |
| 1243 | 4. Fixup Relocation with GOT offset value. */ |
| 1244 | |
| 1245 | /* 1. Determine GOT Offset to use : TLS_LD, global, local */ |
| 1246 | if (IS_TLS_LD (tls_type)) |
| 1247 | offp = &htab->tlsld_got.offset; |
| 1248 | else if (h != NULL) |
| 1249 | { |
| 1250 | if (htab->elf.sgotplt != NULL |
| 1251 | && h->got.offset != (bfd_vma) -1) |
| 1252 | offp = &h->got.offset; |
| 1253 | else |
| 1254 | abort (); |
| 1255 | } |
| 1256 | else |
| 1257 | { |
| 1258 | if (local_got_offsets == NULL) |
| 1259 | abort (); |
| 1260 | offp = &local_got_offsets[r_symndx]; |
| 1261 | } |
| 1262 | |
| 1263 | if (!offp) |
| 1264 | abort (); |
| 1265 | |
| 1266 | off = (*offp) & ~1; |
| 1267 | off2 = off; |
| 1268 | |
| 1269 | if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type)) |
| 1270 | off2 = off + 4; |
| 1271 | |
| 1272 | /* Symbol index to use for relocs */ |
| 1273 | if (h != NULL) |
| 1274 | { |
| 1275 | bfd_boolean dyn = |
| 1276 | elf_hash_table (info)->dynamic_sections_created; |
| 1277 | |
| 1278 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 1279 | bfd_link_pic (info), |
| 1280 | h) |
| 1281 | && (!bfd_link_pic (info) |
| 1282 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 1283 | indx = h->dynindx; |
| 1284 | } |
| 1285 | |
| 1286 | /* Need to generate relocs ? */ |
| 1287 | if ((bfd_link_pic (info) || indx != 0) |
| 1288 | && (h == NULL |
| 1289 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1290 | && !resolved_to_zero) |
| 1291 | || h->root.type != bfd_link_hash_undefweak)) |
| 1292 | need_relocs = TRUE; |
| 1293 | |
| 1294 | /* 2. Compute/Emit Static value of r-expression */ |
| 1295 | static_value = relocation + addend; |
| 1296 | |
| 1297 | /* 3. Process module-id and offset */ |
| 1298 | if (! ((*offp) & 1) ) |
| 1299 | { |
| 1300 | bfd_vma got_offset; |
| 1301 | |
| 1302 | got_offset = (htab->elf.sgot->output_section->vma |
| 1303 | + htab->elf.sgot->output_offset |
| 1304 | + off); |
| 1305 | |
| 1306 | /* Process module-id */ |
| 1307 | if (IS_TLS_LD(tls_type)) |
| 1308 | { |
| 1309 | if (! bfd_link_pic (info)) |
| 1310 | bfd_put_32 (output_bfd, 1, |
| 1311 | htab->elf.sgot->contents + off); |
| 1312 | else |
| 1313 | microblaze_elf_output_dynamic_relocation |
| 1314 | (output_bfd, |
| 1315 | htab->elf.srelgot, |
| 1316 | htab->elf.srelgot->reloc_count++, |
| 1317 | /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32, |
| 1318 | got_offset, 0); |
| 1319 | } |
| 1320 | else if (IS_TLS_GD(tls_type)) |
| 1321 | { |
| 1322 | if (! need_relocs) |
| 1323 | bfd_put_32 (output_bfd, 1, |
| 1324 | htab->elf.sgot->contents + off); |
| 1325 | else |
| 1326 | microblaze_elf_output_dynamic_relocation |
| 1327 | (output_bfd, |
| 1328 | htab->elf.srelgot, |
| 1329 | htab->elf.srelgot->reloc_count++, |
| 1330 | /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32, |
| 1331 | got_offset, indx ? 0 : static_value); |
| 1332 | } |
| 1333 | |
| 1334 | /* Process Offset */ |
| 1335 | if (htab->elf.srelgot == NULL) |
| 1336 | abort (); |
| 1337 | |
| 1338 | got_offset = (htab->elf.sgot->output_section->vma |
| 1339 | + htab->elf.sgot->output_offset |
| 1340 | + off2); |
| 1341 | if (IS_TLS_LD(tls_type)) |
| 1342 | { |
| 1343 | /* For LD, offset should be 0 */ |
| 1344 | *offp |= 1; |
| 1345 | bfd_put_32 (output_bfd, 0, |
| 1346 | htab->elf.sgot->contents + off2); |
| 1347 | } |
| 1348 | else if (IS_TLS_GD(tls_type)) |
| 1349 | { |
| 1350 | *offp |= 1; |
| 1351 | static_value -= dtprel_base(info); |
| 1352 | if (need_relocs) |
| 1353 | microblaze_elf_output_dynamic_relocation |
| 1354 | (output_bfd, |
| 1355 | htab->elf.srelgot, |
| 1356 | htab->elf.srelgot->reloc_count++, |
| 1357 | /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32, |
| 1358 | got_offset, indx ? 0 : static_value); |
| 1359 | else |
| 1360 | bfd_put_32 (output_bfd, static_value, |
| 1361 | htab->elf.sgot->contents + off2); |
| 1362 | } |
| 1363 | else |
| 1364 | { |
| 1365 | bfd_put_32 (output_bfd, static_value, |
| 1366 | htab->elf.sgot->contents + off2); |
| 1367 | |
| 1368 | /* Relocs for dyn symbols generated by |
| 1369 | finish_dynamic_symbols */ |
| 1370 | if (bfd_link_pic (info) && h == NULL) |
| 1371 | { |
| 1372 | *offp |= 1; |
| 1373 | microblaze_elf_output_dynamic_relocation |
| 1374 | (output_bfd, |
| 1375 | htab->elf.srelgot, |
| 1376 | htab->elf.srelgot->reloc_count++, |
| 1377 | /* symindex= */ indx, R_MICROBLAZE_REL, |
| 1378 | got_offset, static_value); |
| 1379 | } |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | /* 4. Fixup Relocation with GOT offset value |
| 1384 | Compute relative address of GOT entry for applying |
| 1385 | the current relocation */ |
| 1386 | relocation = htab->elf.sgot->output_section->vma |
| 1387 | + htab->elf.sgot->output_offset |
| 1388 | + off |
| 1389 | - htab->elf.sgotplt->output_section->vma |
| 1390 | - htab->elf.sgotplt->output_offset; |
| 1391 | |
| 1392 | /* Apply Current Relocation */ |
| 1393 | bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, |
| 1394 | contents + offset + endian); |
| 1395 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1396 | contents + offset + endian + INST_WORD_SIZE); |
| 1397 | |
| 1398 | unresolved_reloc = FALSE; |
| 1399 | break; |
| 1400 | } |
| 1401 | |
| 1402 | case (int) R_MICROBLAZE_GOTOFF_64: |
| 1403 | { |
| 1404 | bfd_vma immediate; |
| 1405 | unsigned short lo, high; |
| 1406 | relocation += addend; |
| 1407 | relocation -= (htab->elf.sgotplt->output_section->vma |
| 1408 | + htab->elf.sgotplt->output_offset); |
| 1409 | /* Write this value into correct location. */ |
| 1410 | immediate = relocation; |
| 1411 | lo = immediate & 0x0000ffff; |
| 1412 | high = (immediate >> 16) & 0x0000ffff; |
| 1413 | bfd_put_16 (input_bfd, high, contents + offset + endian); |
| 1414 | bfd_put_16 (input_bfd, lo, |
| 1415 | contents + offset + INST_WORD_SIZE + endian); |
| 1416 | break; |
| 1417 | } |
| 1418 | |
| 1419 | case (int) R_MICROBLAZE_GOTOFF_32: |
| 1420 | { |
| 1421 | relocation += addend; |
| 1422 | relocation -= (htab->elf.sgotplt->output_section->vma |
| 1423 | + htab->elf.sgotplt->output_offset); |
| 1424 | /* Write this value into correct location. */ |
| 1425 | bfd_put_32 (input_bfd, relocation, contents + offset); |
| 1426 | break; |
| 1427 | } |
| 1428 | |
| 1429 | case (int) R_MICROBLAZE_TLSDTPREL64: |
| 1430 | relocation += addend; |
| 1431 | relocation -= dtprel_base(info); |
| 1432 | bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, |
| 1433 | contents + offset + 2); |
| 1434 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1435 | contents + offset + 2 + INST_WORD_SIZE); |
| 1436 | break; |
| 1437 | case (int) R_MICROBLAZE_TEXTREL_64: |
| 1438 | case (int) R_MICROBLAZE_TEXTREL_32_LO: |
| 1439 | case (int) R_MICROBLAZE_64_PCREL : |
| 1440 | case (int) R_MICROBLAZE_64: |
| 1441 | case (int) R_MICROBLAZE_32: |
| 1442 | { |
| 1443 | /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols |
| 1444 | from removed linkonce sections, or sections discarded by |
| 1445 | a linker script. */ |
| 1446 | if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0) |
| 1447 | { |
| 1448 | relocation += addend; |
| 1449 | if (r_type == R_MICROBLAZE_32) |
| 1450 | bfd_put_32 (input_bfd, relocation, contents + offset); |
| 1451 | else |
| 1452 | { |
| 1453 | if (r_type == R_MICROBLAZE_64_PCREL) |
| 1454 | relocation -= (input_section->output_section->vma |
| 1455 | + input_section->output_offset |
| 1456 | + offset + INST_WORD_SIZE); |
| 1457 | else if (r_type == R_MICROBLAZE_TEXTREL_64 |
| 1458 | || r_type == R_MICROBLAZE_TEXTREL_32_LO) |
| 1459 | relocation -= input_section->output_section->vma; |
| 1460 | |
| 1461 | if (r_type == R_MICROBLAZE_TEXTREL_32_LO) |
| 1462 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1463 | contents + offset + endian); |
| 1464 | |
| 1465 | else |
| 1466 | { |
| 1467 | bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, |
| 1468 | contents + offset + endian); |
| 1469 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1470 | contents + offset + endian + INST_WORD_SIZE); |
| 1471 | } |
| 1472 | } |
| 1473 | break; |
| 1474 | } |
| 1475 | |
| 1476 | if ((bfd_link_pic (info) |
| 1477 | && (h == NULL |
| 1478 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1479 | && !resolved_to_zero) |
| 1480 | || h->root.type != bfd_link_hash_undefweak) |
| 1481 | && (!howto->pc_relative |
| 1482 | || (h != NULL |
| 1483 | && h->dynindx != -1 |
| 1484 | && (!info->symbolic |
| 1485 | || !h->def_regular)))) |
| 1486 | || (!bfd_link_pic (info) |
| 1487 | && h != NULL |
| 1488 | && h->dynindx != -1 |
| 1489 | && !h->non_got_ref |
| 1490 | && ((h->def_dynamic |
| 1491 | && !h->def_regular) |
| 1492 | || h->root.type == bfd_link_hash_undefweak |
| 1493 | || h->root.type == bfd_link_hash_undefined))) |
| 1494 | { |
| 1495 | Elf_Internal_Rela outrel; |
| 1496 | bfd_byte *loc; |
| 1497 | bfd_boolean skip; |
| 1498 | |
| 1499 | /* When generating a shared object, these relocations |
| 1500 | are copied into the output file to be resolved at run |
| 1501 | time. */ |
| 1502 | |
| 1503 | BFD_ASSERT (sreloc != NULL); |
| 1504 | |
| 1505 | skip = FALSE; |
| 1506 | |
| 1507 | outrel.r_offset = |
| 1508 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 1509 | rel->r_offset); |
| 1510 | if (outrel.r_offset == (bfd_vma) -1) |
| 1511 | skip = TRUE; |
| 1512 | else if (outrel.r_offset == (bfd_vma) -2) |
| 1513 | skip = TRUE; |
| 1514 | outrel.r_offset += (input_section->output_section->vma |
| 1515 | + input_section->output_offset); |
| 1516 | |
| 1517 | if (skip) |
| 1518 | memset (&outrel, 0, sizeof outrel); |
| 1519 | /* h->dynindx may be -1 if the symbol was marked to |
| 1520 | become local. */ |
| 1521 | else if (h != NULL |
| 1522 | && ((! info->symbolic && h->dynindx != -1) |
| 1523 | || !h->def_regular)) |
| 1524 | { |
| 1525 | BFD_ASSERT (h->dynindx != -1); |
| 1526 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 1527 | outrel.r_addend = addend; |
| 1528 | } |
| 1529 | else |
| 1530 | { |
| 1531 | if (r_type == R_MICROBLAZE_32) |
| 1532 | { |
| 1533 | outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL); |
| 1534 | outrel.r_addend = relocation + addend; |
| 1535 | } |
| 1536 | else |
| 1537 | { |
| 1538 | BFD_FAIL (); |
| 1539 | _bfd_error_handler |
| 1540 | (_("%pB: probably compiled without -fPIC?"), |
| 1541 | input_bfd); |
| 1542 | bfd_set_error (bfd_error_bad_value); |
| 1543 | return FALSE; |
| 1544 | } |
| 1545 | } |
| 1546 | |
| 1547 | loc = sreloc->contents; |
| 1548 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1549 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1550 | break; |
| 1551 | } |
| 1552 | else |
| 1553 | { |
| 1554 | relocation += addend; |
| 1555 | if (r_type == R_MICROBLAZE_32) |
| 1556 | bfd_put_32 (input_bfd, relocation, contents + offset); |
| 1557 | else |
| 1558 | { |
| 1559 | if (r_type == R_MICROBLAZE_64_PCREL) |
| 1560 | relocation -= (input_section->output_section->vma |
| 1561 | + input_section->output_offset |
| 1562 | + offset + INST_WORD_SIZE); |
| 1563 | else if (r_type == R_MICROBLAZE_TEXTREL_64 |
| 1564 | || r_type == R_MICROBLAZE_TEXTREL_32_LO) |
| 1565 | relocation -= input_section->output_section->vma; |
| 1566 | |
| 1567 | if (r_type == R_MICROBLAZE_TEXTREL_32_LO) |
| 1568 | { |
| 1569 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1570 | contents + offset + endian); |
| 1571 | } |
| 1572 | else |
| 1573 | { |
| 1574 | bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, |
| 1575 | contents + offset + endian); |
| 1576 | bfd_put_16 (input_bfd, relocation & 0xffff, |
| 1577 | contents + offset + endian |
| 1578 | + INST_WORD_SIZE); |
| 1579 | } |
| 1580 | } |
| 1581 | break; |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | default : |
| 1586 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1587 | contents, offset, |
| 1588 | relocation, addend); |
| 1589 | break; |
| 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | check_reloc: |
| 1594 | |
| 1595 | if (r != bfd_reloc_ok) |
| 1596 | { |
| 1597 | /* FIXME: This should be generic enough to go in a utility. */ |
| 1598 | const char *name; |
| 1599 | |
| 1600 | if (h != NULL) |
| 1601 | name = h->root.root.string; |
| 1602 | else |
| 1603 | { |
| 1604 | name = (bfd_elf_string_from_elf_section |
| 1605 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1606 | if (name == NULL || *name == '\0') |
| 1607 | name = bfd_section_name (sec); |
| 1608 | } |
| 1609 | |
| 1610 | if (errmsg != NULL) |
| 1611 | goto common_error; |
| 1612 | |
| 1613 | switch (r) |
| 1614 | { |
| 1615 | case bfd_reloc_overflow: |
| 1616 | (*info->callbacks->reloc_overflow) |
| 1617 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1618 | (bfd_vma) 0, input_bfd, input_section, offset); |
| 1619 | break; |
| 1620 | |
| 1621 | case bfd_reloc_undefined: |
| 1622 | (*info->callbacks->undefined_symbol) |
| 1623 | (info, name, input_bfd, input_section, offset, TRUE); |
| 1624 | break; |
| 1625 | |
| 1626 | case bfd_reloc_outofrange: |
| 1627 | errmsg = _("internal error: out of range error"); |
| 1628 | goto common_error; |
| 1629 | |
| 1630 | case bfd_reloc_notsupported: |
| 1631 | errmsg = _("internal error: unsupported relocation error"); |
| 1632 | goto common_error; |
| 1633 | |
| 1634 | case bfd_reloc_dangerous: |
| 1635 | errmsg = _("internal error: dangerous error"); |
| 1636 | goto common_error; |
| 1637 | |
| 1638 | default: |
| 1639 | errmsg = _("internal error: unknown error"); |
| 1640 | /* Fall through. */ |
| 1641 | common_error: |
| 1642 | (*info->callbacks->warning) (info, errmsg, name, input_bfd, |
| 1643 | input_section, offset); |
| 1644 | break; |
| 1645 | } |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | return ret; |
| 1650 | } |
| 1651 | \f |
| 1652 | /* Calculate fixup value for reference. */ |
| 1653 | |
| 1654 | static int |
| 1655 | calc_fixup (bfd_vma start, bfd_vma size, asection *sec) |
| 1656 | { |
| 1657 | bfd_vma end = start + size; |
| 1658 | int i, fixup = 0; |
| 1659 | |
| 1660 | if (sec == NULL || sec->relax == NULL) |
| 1661 | return 0; |
| 1662 | |
| 1663 | /* Look for addr in relax table, total fixup value. */ |
| 1664 | for (i = 0; i < sec->relax_count; i++) |
| 1665 | { |
| 1666 | if (end <= sec->relax[i].addr) |
| 1667 | break; |
| 1668 | if ((end != start) && (start > sec->relax[i].addr)) |
| 1669 | continue; |
| 1670 | fixup += sec->relax[i].size; |
| 1671 | } |
| 1672 | return fixup; |
| 1673 | } |
| 1674 | |
| 1675 | /* Read-modify-write into the bfd, an immediate value into appropriate fields of |
| 1676 | a 32-bit instruction. */ |
| 1677 | static void |
| 1678 | microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val) |
| 1679 | { |
| 1680 | unsigned long instr = bfd_get_32 (abfd, bfd_addr); |
| 1681 | instr &= ~0x0000ffff; |
| 1682 | instr |= (val & 0x0000ffff); |
| 1683 | bfd_put_32 (abfd, instr, bfd_addr); |
| 1684 | } |
| 1685 | |
| 1686 | /* Read-modify-write into the bfd, an immediate value into appropriate fields of |
| 1687 | two consecutive 32-bit instructions. */ |
| 1688 | static void |
| 1689 | microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val) |
| 1690 | { |
| 1691 | unsigned long instr_hi; |
| 1692 | unsigned long instr_lo; |
| 1693 | |
| 1694 | instr_hi = bfd_get_32 (abfd, bfd_addr); |
| 1695 | instr_hi &= ~0x0000ffff; |
| 1696 | instr_hi |= ((val >> 16) & 0x0000ffff); |
| 1697 | bfd_put_32 (abfd, instr_hi, bfd_addr); |
| 1698 | |
| 1699 | instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE); |
| 1700 | instr_lo &= ~0x0000ffff; |
| 1701 | instr_lo |= (val & 0x0000ffff); |
| 1702 | bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE); |
| 1703 | } |
| 1704 | |
| 1705 | static bfd_boolean |
| 1706 | microblaze_elf_relax_section (bfd *abfd, |
| 1707 | asection *sec, |
| 1708 | struct bfd_link_info *link_info, |
| 1709 | bfd_boolean *again) |
| 1710 | { |
| 1711 | Elf_Internal_Shdr *symtab_hdr; |
| 1712 | Elf_Internal_Rela *internal_relocs; |
| 1713 | Elf_Internal_Rela *free_relocs = NULL; |
| 1714 | Elf_Internal_Rela *irel, *irelend; |
| 1715 | bfd_byte *contents = NULL; |
| 1716 | bfd_byte *free_contents = NULL; |
| 1717 | int rel_count; |
| 1718 | unsigned int shndx; |
| 1719 | int i, sym_index; |
| 1720 | asection *o; |
| 1721 | struct elf_link_hash_entry *sym_hash; |
| 1722 | Elf_Internal_Sym *isymbuf, *isymend; |
| 1723 | Elf_Internal_Sym *isym; |
| 1724 | int symcount; |
| 1725 | int offset; |
| 1726 | bfd_vma src, dest; |
| 1727 | |
| 1728 | /* We only do this once per section. We may be able to delete some code |
| 1729 | by running multiple passes, but it is not worth it. */ |
| 1730 | *again = FALSE; |
| 1731 | |
| 1732 | /* Only do this for a text section. */ |
| 1733 | if (bfd_link_relocatable (link_info) |
| 1734 | || (sec->flags & SEC_RELOC) == 0 |
| 1735 | || (sec->reloc_count == 0) |
| 1736 | || (sec->flags & SEC_CODE) == 0) |
| 1737 | return TRUE; |
| 1738 | |
| 1739 | BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0)); |
| 1740 | |
| 1741 | /* If this is the first time we have been called for this section, |
| 1742 | initialize the cooked size. */ |
| 1743 | if (sec->size == 0) |
| 1744 | sec->size = sec->rawsize; |
| 1745 | |
| 1746 | /* Get symbols for this section. */ |
| 1747 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1748 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1749 | symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 1750 | if (isymbuf == NULL) |
| 1751 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount, |
| 1752 | 0, NULL, NULL, NULL); |
| 1753 | BFD_ASSERT (isymbuf != NULL); |
| 1754 | |
| 1755 | internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory); |
| 1756 | if (internal_relocs == NULL) |
| 1757 | goto error_return; |
| 1758 | if (! link_info->keep_memory) |
| 1759 | free_relocs = internal_relocs; |
| 1760 | |
| 1761 | sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1) |
| 1762 | * sizeof (struct relax_table)); |
| 1763 | if (sec->relax == NULL) |
| 1764 | goto error_return; |
| 1765 | sec->relax_count = 0; |
| 1766 | |
| 1767 | irelend = internal_relocs + sec->reloc_count; |
| 1768 | rel_count = 0; |
| 1769 | for (irel = internal_relocs; irel < irelend; irel++, rel_count++) |
| 1770 | { |
| 1771 | bfd_vma symval; |
| 1772 | if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL) |
| 1773 | && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64) |
| 1774 | && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_TEXTREL_64)) |
| 1775 | continue; /* Can't delete this reloc. */ |
| 1776 | |
| 1777 | /* Get the section contents. */ |
| 1778 | if (contents == NULL) |
| 1779 | { |
| 1780 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 1781 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1782 | else |
| 1783 | { |
| 1784 | contents = (bfd_byte *) bfd_malloc (sec->size); |
| 1785 | if (contents == NULL) |
| 1786 | goto error_return; |
| 1787 | free_contents = contents; |
| 1788 | |
| 1789 | if (!bfd_get_section_contents (abfd, sec, contents, |
| 1790 | (file_ptr) 0, sec->size)) |
| 1791 | goto error_return; |
| 1792 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1793 | } |
| 1794 | } |
| 1795 | |
| 1796 | /* Get the value of the symbol referred to by the reloc. */ |
| 1797 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1798 | { |
| 1799 | /* A local symbol. */ |
| 1800 | asection *sym_sec; |
| 1801 | |
| 1802 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 1803 | if (isym->st_shndx == SHN_UNDEF) |
| 1804 | sym_sec = bfd_und_section_ptr; |
| 1805 | else if (isym->st_shndx == SHN_ABS) |
| 1806 | sym_sec = bfd_abs_section_ptr; |
| 1807 | else if (isym->st_shndx == SHN_COMMON) |
| 1808 | sym_sec = bfd_com_section_ptr; |
| 1809 | else |
| 1810 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1811 | |
| 1812 | symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel); |
| 1813 | } |
| 1814 | else |
| 1815 | { |
| 1816 | unsigned long indx; |
| 1817 | struct elf_link_hash_entry *h; |
| 1818 | |
| 1819 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 1820 | h = elf_sym_hashes (abfd)[indx]; |
| 1821 | BFD_ASSERT (h != NULL); |
| 1822 | |
| 1823 | if (h->root.type != bfd_link_hash_defined |
| 1824 | && h->root.type != bfd_link_hash_defweak) |
| 1825 | /* This appears to be a reference to an undefined |
| 1826 | symbol. Just ignore it--it will be caught by the |
| 1827 | regular reloc processing. */ |
| 1828 | continue; |
| 1829 | |
| 1830 | symval = (h->root.u.def.value |
| 1831 | + h->root.u.def.section->output_section->vma |
| 1832 | + h->root.u.def.section->output_offset); |
| 1833 | } |
| 1834 | |
| 1835 | /* If this is a PC-relative reloc, subtract the instr offset from |
| 1836 | the symbol value. */ |
| 1837 | if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL) |
| 1838 | { |
| 1839 | symval = symval + irel->r_addend |
| 1840 | - (irel->r_offset |
| 1841 | + sec->output_section->vma |
| 1842 | + sec->output_offset); |
| 1843 | } |
| 1844 | else if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_TEXTREL_64) |
| 1845 | { |
| 1846 | symval = symval + irel->r_addend - (sec->output_section->vma); |
| 1847 | } |
| 1848 | else |
| 1849 | symval += irel->r_addend; |
| 1850 | |
| 1851 | if ((symval & 0xffff8000) == 0 |
| 1852 | || (symval & 0xffff8000) == 0xffff8000) |
| 1853 | { |
| 1854 | /* We can delete this instruction. */ |
| 1855 | sec->relax[sec->relax_count].addr = irel->r_offset; |
| 1856 | sec->relax[sec->relax_count].size = INST_WORD_SIZE; |
| 1857 | sec->relax_count++; |
| 1858 | |
| 1859 | /* Rewrite relocation type. */ |
| 1860 | switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info)) |
| 1861 | { |
| 1862 | case R_MICROBLAZE_64_PCREL: |
| 1863 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1864 | (int) R_MICROBLAZE_32_PCREL_LO); |
| 1865 | break; |
| 1866 | case R_MICROBLAZE_64: |
| 1867 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1868 | (int) R_MICROBLAZE_32_LO); |
| 1869 | break; |
| 1870 | case R_MICROBLAZE_TEXTREL_64: |
| 1871 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1872 | (int) R_MICROBLAZE_TEXTREL_32_LO); |
| 1873 | break; |
| 1874 | default: |
| 1875 | /* Cannot happen. */ |
| 1876 | BFD_ASSERT (FALSE); |
| 1877 | } |
| 1878 | } |
| 1879 | } /* Loop through all relocations. */ |
| 1880 | |
| 1881 | /* Loop through the relocs again, and see if anything needs to change. */ |
| 1882 | if (sec->relax_count > 0) |
| 1883 | { |
| 1884 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1885 | rel_count = 0; |
| 1886 | sec->relax[sec->relax_count].addr = sec->size; |
| 1887 | |
| 1888 | for (irel = internal_relocs; irel < irelend; irel++, rel_count++) |
| 1889 | { |
| 1890 | bfd_vma nraddr; |
| 1891 | |
| 1892 | /* Get the new reloc address. */ |
| 1893 | nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec); |
| 1894 | switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info)) |
| 1895 | { |
| 1896 | default: |
| 1897 | break; |
| 1898 | case R_MICROBLAZE_64_PCREL: |
| 1899 | break; |
| 1900 | case R_MICROBLAZE_TEXTREL_64: |
| 1901 | case R_MICROBLAZE_TEXTREL_32_LO: |
| 1902 | case R_MICROBLAZE_64: |
| 1903 | case R_MICROBLAZE_32_LO: |
| 1904 | /* If this reloc is against a symbol defined in this |
| 1905 | section, we must check the addend to see it will put the value in |
| 1906 | range to be adjusted, and hence must be changed. */ |
| 1907 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1908 | { |
| 1909 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 1910 | /* Only handle relocs against .text. */ |
| 1911 | if (isym->st_shndx == shndx |
| 1912 | && ELF32_ST_TYPE (isym->st_info) == STT_SECTION) |
| 1913 | irel->r_addend -= calc_fixup (irel->r_addend, 0, sec); |
| 1914 | } |
| 1915 | break; |
| 1916 | case R_MICROBLAZE_NONE: |
| 1917 | { |
| 1918 | /* This was a PC-relative instruction that was |
| 1919 | completely resolved. */ |
| 1920 | int sfix, efix; |
| 1921 | bfd_vma target_address; |
| 1922 | target_address = irel->r_addend + irel->r_offset; |
| 1923 | sfix = calc_fixup (irel->r_offset, 0, sec); |
| 1924 | efix = calc_fixup (target_address, 0, sec); |
| 1925 | irel->r_addend -= (efix - sfix); |
| 1926 | /* Should use HOWTO. */ |
| 1927 | microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset, |
| 1928 | irel->r_addend); |
| 1929 | } |
| 1930 | break; |
| 1931 | case R_MICROBLAZE_64_NONE: |
| 1932 | { |
| 1933 | /* This was a PC-relative 64-bit instruction that was |
| 1934 | completely resolved. */ |
| 1935 | int sfix, efix; |
| 1936 | bfd_vma target_address; |
| 1937 | target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE; |
| 1938 | sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec); |
| 1939 | efix = calc_fixup (target_address, 0, sec); |
| 1940 | irel->r_addend -= (efix - sfix); |
| 1941 | microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset |
| 1942 | + INST_WORD_SIZE, irel->r_addend); |
| 1943 | } |
| 1944 | break; |
| 1945 | } |
| 1946 | irel->r_offset = nraddr; |
| 1947 | } /* Change all relocs in this section. */ |
| 1948 | |
| 1949 | /* Look through all other sections. */ |
| 1950 | for (o = abfd->sections; o != NULL; o = o->next) |
| 1951 | { |
| 1952 | Elf_Internal_Rela *irelocs; |
| 1953 | Elf_Internal_Rela *irelscan, *irelscanend; |
| 1954 | bfd_byte *ocontents; |
| 1955 | |
| 1956 | if (o == sec |
| 1957 | || (o->flags & SEC_RELOC) == 0 |
| 1958 | || o->reloc_count == 0) |
| 1959 | continue; |
| 1960 | |
| 1961 | /* We always cache the relocs. Perhaps, if info->keep_memory is |
| 1962 | FALSE, we should free them, if we are permitted to. */ |
| 1963 | |
| 1964 | irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE); |
| 1965 | if (irelocs == NULL) |
| 1966 | goto error_return; |
| 1967 | |
| 1968 | ocontents = NULL; |
| 1969 | irelscanend = irelocs + o->reloc_count; |
| 1970 | for (irelscan = irelocs; irelscan < irelscanend; irelscan++) |
| 1971 | { |
| 1972 | if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32) |
| 1973 | { |
| 1974 | isym = isymbuf + ELF32_R_SYM (irelscan->r_info); |
| 1975 | |
| 1976 | /* Look at the reloc only if the value has been resolved. */ |
| 1977 | if (isym->st_shndx == shndx |
| 1978 | && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) |
| 1979 | { |
| 1980 | if (ocontents == NULL) |
| 1981 | { |
| 1982 | if (elf_section_data (o)->this_hdr.contents != NULL) |
| 1983 | ocontents = elf_section_data (o)->this_hdr.contents; |
| 1984 | else |
| 1985 | { |
| 1986 | /* We always cache the section contents. |
| 1987 | Perhaps, if info->keep_memory is FALSE, we |
| 1988 | should free them, if we are permitted to. */ |
| 1989 | if (o->rawsize == 0) |
| 1990 | o->rawsize = o->size; |
| 1991 | ocontents = (bfd_byte *) bfd_malloc (o->rawsize); |
| 1992 | if (ocontents == NULL) |
| 1993 | goto error_return; |
| 1994 | if (!bfd_get_section_contents (abfd, o, ocontents, |
| 1995 | (file_ptr) 0, |
| 1996 | o->rawsize)) |
| 1997 | goto error_return; |
| 1998 | elf_section_data (o)->this_hdr.contents = ocontents; |
| 1999 | } |
| 2000 | |
| 2001 | } |
| 2002 | irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec); |
| 2003 | } |
| 2004 | else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM) |
| 2005 | { |
| 2006 | isym = isymbuf + ELF32_R_SYM (irelscan->r_info); |
| 2007 | |
| 2008 | /* Look at the reloc only if the value has been resolved. */ |
| 2009 | if (ocontents == NULL) |
| 2010 | { |
| 2011 | if (elf_section_data (o)->this_hdr.contents != NULL) |
| 2012 | ocontents = elf_section_data (o)->this_hdr.contents; |
| 2013 | else |
| 2014 | { |
| 2015 | /* We always cache the section contents. |
| 2016 | Perhaps, if info->keep_memory is FALSE, we |
| 2017 | should free them, if we are permitted to. */ |
| 2018 | |
| 2019 | if (o->rawsize == 0) |
| 2020 | o->rawsize = o->size; |
| 2021 | ocontents = (bfd_byte *) bfd_malloc (o->rawsize); |
| 2022 | if (ocontents == NULL) |
| 2023 | goto error_return; |
| 2024 | if (!bfd_get_section_contents (abfd, o, ocontents, |
| 2025 | (file_ptr) 0, |
| 2026 | o->rawsize)) |
| 2027 | goto error_return; |
| 2028 | elf_section_data (o)->this_hdr.contents = ocontents; |
| 2029 | } |
| 2030 | } |
| 2031 | irelscan->r_addend -= calc_fixup (irel->r_addend |
| 2032 | + isym->st_value, |
| 2033 | 0, |
| 2034 | sec); |
| 2035 | } |
| 2036 | } |
| 2037 | else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO) |
| 2038 | || (ELF32_R_TYPE (irelscan->r_info) |
| 2039 | == (int) R_MICROBLAZE_32_LO) |
| 2040 | || (ELF32_R_TYPE (irelscan->r_info) |
| 2041 | == (int) R_MICROBLAZE_TEXTREL_32_LO)) |
| 2042 | { |
| 2043 | isym = isymbuf + ELF32_R_SYM (irelscan->r_info); |
| 2044 | |
| 2045 | /* Look at the reloc only if the value has been resolved. */ |
| 2046 | if (isym->st_shndx == shndx |
| 2047 | && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) |
| 2048 | { |
| 2049 | bfd_vma immediate; |
| 2050 | bfd_vma target_address; |
| 2051 | |
| 2052 | if (ocontents == NULL) |
| 2053 | { |
| 2054 | if (elf_section_data (o)->this_hdr.contents != NULL) |
| 2055 | ocontents = elf_section_data (o)->this_hdr.contents; |
| 2056 | else |
| 2057 | { |
| 2058 | /* We always cache the section contents. |
| 2059 | Perhaps, if info->keep_memory is FALSE, we |
| 2060 | should free them, if we are permitted to. */ |
| 2061 | if (o->rawsize == 0) |
| 2062 | o->rawsize = o->size; |
| 2063 | ocontents = (bfd_byte *) bfd_malloc (o->rawsize); |
| 2064 | if (ocontents == NULL) |
| 2065 | goto error_return; |
| 2066 | if (!bfd_get_section_contents (abfd, o, ocontents, |
| 2067 | (file_ptr) 0, |
| 2068 | o->rawsize)) |
| 2069 | goto error_return; |
| 2070 | elf_section_data (o)->this_hdr.contents = ocontents; |
| 2071 | } |
| 2072 | } |
| 2073 | |
| 2074 | unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset); |
| 2075 | immediate = instr & 0x0000ffff; |
| 2076 | target_address = immediate; |
| 2077 | offset = calc_fixup (target_address, 0, sec); |
| 2078 | immediate -= offset; |
| 2079 | irelscan->r_addend -= offset; |
| 2080 | microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset, |
| 2081 | irelscan->r_addend); |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64 |
| 2086 | || (ELF32_R_TYPE (irelscan->r_info) |
| 2087 | == (int) R_MICROBLAZE_TEXTREL_64)) |
| 2088 | { |
| 2089 | isym = isymbuf + ELF32_R_SYM (irelscan->r_info); |
| 2090 | |
| 2091 | /* Look at the reloc only if the value has been resolved. */ |
| 2092 | if (isym->st_shndx == shndx |
| 2093 | && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) |
| 2094 | { |
| 2095 | bfd_vma immediate; |
| 2096 | |
| 2097 | if (ocontents == NULL) |
| 2098 | { |
| 2099 | if (elf_section_data (o)->this_hdr.contents != NULL) |
| 2100 | ocontents = elf_section_data (o)->this_hdr.contents; |
| 2101 | else |
| 2102 | { |
| 2103 | /* We always cache the section contents. |
| 2104 | Perhaps, if info->keep_memory is FALSE, we |
| 2105 | should free them, if we are permitted to. */ |
| 2106 | |
| 2107 | if (o->rawsize == 0) |
| 2108 | o->rawsize = o->size; |
| 2109 | ocontents = (bfd_byte *) bfd_malloc (o->rawsize); |
| 2110 | if (ocontents == NULL) |
| 2111 | goto error_return; |
| 2112 | if (!bfd_get_section_contents (abfd, o, ocontents, |
| 2113 | (file_ptr) 0, |
| 2114 | o->rawsize)) |
| 2115 | goto error_return; |
| 2116 | elf_section_data (o)->this_hdr.contents = ocontents; |
| 2117 | } |
| 2118 | } |
| 2119 | unsigned long instr_hi = bfd_get_32 (abfd, ocontents |
| 2120 | + irelscan->r_offset); |
| 2121 | unsigned long instr_lo = bfd_get_32 (abfd, ocontents |
| 2122 | + irelscan->r_offset |
| 2123 | + INST_WORD_SIZE); |
| 2124 | immediate = (instr_hi & 0x0000ffff) << 16; |
| 2125 | immediate |= (instr_lo & 0x0000ffff); |
| 2126 | offset = calc_fixup (irelscan->r_addend, 0, sec); |
| 2127 | immediate -= offset; |
| 2128 | irelscan->r_addend -= offset; |
| 2129 | } |
| 2130 | } |
| 2131 | else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL) |
| 2132 | { |
| 2133 | isym = isymbuf + ELF32_R_SYM (irelscan->r_info); |
| 2134 | |
| 2135 | /* Look at the reloc only if the value has been resolved. */ |
| 2136 | if (isym->st_shndx == shndx |
| 2137 | && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) |
| 2138 | { |
| 2139 | bfd_vma immediate; |
| 2140 | bfd_vma target_address; |
| 2141 | |
| 2142 | if (ocontents == NULL) |
| 2143 | { |
| 2144 | if (elf_section_data (o)->this_hdr.contents != NULL) |
| 2145 | ocontents = elf_section_data (o)->this_hdr.contents; |
| 2146 | else |
| 2147 | { |
| 2148 | /* We always cache the section contents. |
| 2149 | Perhaps, if info->keep_memory is FALSE, we |
| 2150 | should free them, if we are permitted to. */ |
| 2151 | if (o->rawsize == 0) |
| 2152 | o->rawsize = o->size; |
| 2153 | ocontents = (bfd_byte *) bfd_malloc (o->rawsize); |
| 2154 | if (ocontents == NULL) |
| 2155 | goto error_return; |
| 2156 | if (!bfd_get_section_contents (abfd, o, ocontents, |
| 2157 | (file_ptr) 0, |
| 2158 | o->rawsize)) |
| 2159 | goto error_return; |
| 2160 | elf_section_data (o)->this_hdr.contents = ocontents; |
| 2161 | } |
| 2162 | } |
| 2163 | unsigned long instr_hi = bfd_get_32 (abfd, ocontents |
| 2164 | + irelscan->r_offset); |
| 2165 | unsigned long instr_lo = bfd_get_32 (abfd, ocontents |
| 2166 | + irelscan->r_offset |
| 2167 | + INST_WORD_SIZE); |
| 2168 | immediate = (instr_hi & 0x0000ffff) << 16; |
| 2169 | immediate |= (instr_lo & 0x0000ffff); |
| 2170 | target_address = immediate; |
| 2171 | offset = calc_fixup (target_address, 0, sec); |
| 2172 | immediate -= offset; |
| 2173 | irelscan->r_addend -= offset; |
| 2174 | microblaze_bfd_write_imm_value_64 (abfd, ocontents |
| 2175 | + irelscan->r_offset, immediate); |
| 2176 | } |
| 2177 | } |
| 2178 | } |
| 2179 | } |
| 2180 | |
| 2181 | /* Adjust the local symbols defined in this section. */ |
| 2182 | isymend = isymbuf + symtab_hdr->sh_info; |
| 2183 | for (isym = isymbuf; isym < isymend; isym++) |
| 2184 | { |
| 2185 | if (isym->st_shndx == shndx) |
| 2186 | { |
| 2187 | isym->st_value -= calc_fixup (isym->st_value, 0, sec); |
| 2188 | if (isym->st_size) |
| 2189 | isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec); |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | /* Now adjust the global symbols defined in this section. */ |
| 2194 | isym = isymbuf + symtab_hdr->sh_info; |
| 2195 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info; |
| 2196 | for (sym_index = 0; sym_index < symcount; sym_index++) |
| 2197 | { |
| 2198 | sym_hash = elf_sym_hashes (abfd)[sym_index]; |
| 2199 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 2200 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 2201 | && sym_hash->root.u.def.section == sec) |
| 2202 | { |
| 2203 | sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value, |
| 2204 | 0, sec); |
| 2205 | if (sym_hash->size) |
| 2206 | sym_hash->size -= calc_fixup (sym_hash->root.u.def.value, |
| 2207 | sym_hash->size, sec); |
| 2208 | } |
| 2209 | } |
| 2210 | |
| 2211 | /* Physically move the code and change the cooked size. */ |
| 2212 | dest = sec->relax[0].addr; |
| 2213 | for (i = 0; i < sec->relax_count; i++) |
| 2214 | { |
| 2215 | int len; |
| 2216 | src = sec->relax[i].addr + sec->relax[i].size; |
| 2217 | len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size; |
| 2218 | |
| 2219 | memmove (contents + dest, contents + src, len); |
| 2220 | sec->size -= sec->relax[i].size; |
| 2221 | dest += len; |
| 2222 | } |
| 2223 | |
| 2224 | elf_section_data (sec)->relocs = internal_relocs; |
| 2225 | free_relocs = NULL; |
| 2226 | |
| 2227 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2228 | free_contents = NULL; |
| 2229 | |
| 2230 | symtab_hdr->contents = (bfd_byte *) isymbuf; |
| 2231 | } |
| 2232 | |
| 2233 | free (free_relocs); |
| 2234 | free_relocs = NULL; |
| 2235 | |
| 2236 | if (free_contents != NULL) |
| 2237 | { |
| 2238 | if (!link_info->keep_memory) |
| 2239 | free (free_contents); |
| 2240 | else |
| 2241 | /* Cache the section contents for elf_link_input_bfd. */ |
| 2242 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2243 | free_contents = NULL; |
| 2244 | } |
| 2245 | |
| 2246 | if (sec->relax_count == 0) |
| 2247 | { |
| 2248 | *again = FALSE; |
| 2249 | free (sec->relax); |
| 2250 | sec->relax = NULL; |
| 2251 | } |
| 2252 | else |
| 2253 | *again = TRUE; |
| 2254 | return TRUE; |
| 2255 | |
| 2256 | error_return: |
| 2257 | free (free_relocs); |
| 2258 | free (free_contents); |
| 2259 | free (sec->relax); |
| 2260 | sec->relax = NULL; |
| 2261 | sec->relax_count = 0; |
| 2262 | return FALSE; |
| 2263 | } |
| 2264 | |
| 2265 | /* Return the section that should be marked against GC for a given |
| 2266 | relocation. */ |
| 2267 | |
| 2268 | static asection * |
| 2269 | microblaze_elf_gc_mark_hook (asection *sec, |
| 2270 | struct bfd_link_info * info, |
| 2271 | Elf_Internal_Rela * rel, |
| 2272 | struct elf_link_hash_entry * h, |
| 2273 | Elf_Internal_Sym * sym) |
| 2274 | { |
| 2275 | if (h != NULL) |
| 2276 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2277 | { |
| 2278 | case R_MICROBLAZE_GNU_VTINHERIT: |
| 2279 | case R_MICROBLAZE_GNU_VTENTRY: |
| 2280 | return NULL; |
| 2281 | } |
| 2282 | |
| 2283 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 2284 | } |
| 2285 | |
| 2286 | /* PIC support. */ |
| 2287 | |
| 2288 | #define PLT_ENTRY_SIZE 16 |
| 2289 | |
| 2290 | #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */ |
| 2291 | #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */ |
| 2292 | #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */ |
| 2293 | #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */ |
| 2294 | #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */ |
| 2295 | |
| 2296 | static bfd_boolean |
| 2297 | update_local_sym_info (bfd *abfd, |
| 2298 | Elf_Internal_Shdr *symtab_hdr, |
| 2299 | unsigned long r_symndx, |
| 2300 | unsigned int tls_type) |
| 2301 | { |
| 2302 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2303 | unsigned char *local_got_tls_masks; |
| 2304 | |
| 2305 | if (local_got_refcounts == NULL) |
| 2306 | { |
| 2307 | bfd_size_type size = symtab_hdr->sh_info; |
| 2308 | |
| 2309 | size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks)); |
| 2310 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 2311 | if (local_got_refcounts == NULL) |
| 2312 | return FALSE; |
| 2313 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2314 | } |
| 2315 | |
| 2316 | local_got_tls_masks = |
| 2317 | (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 2318 | local_got_tls_masks[r_symndx] |= tls_type; |
| 2319 | local_got_refcounts[r_symndx] += 1; |
| 2320 | |
| 2321 | return TRUE; |
| 2322 | } |
| 2323 | /* Look through the relocs for a section during the first phase. */ |
| 2324 | |
| 2325 | static bfd_boolean |
| 2326 | microblaze_elf_check_relocs (bfd * abfd, |
| 2327 | struct bfd_link_info * info, |
| 2328 | asection * sec, |
| 2329 | const Elf_Internal_Rela * relocs) |
| 2330 | { |
| 2331 | Elf_Internal_Shdr * symtab_hdr; |
| 2332 | struct elf_link_hash_entry ** sym_hashes; |
| 2333 | struct elf_link_hash_entry ** sym_hashes_end; |
| 2334 | const Elf_Internal_Rela * rel; |
| 2335 | const Elf_Internal_Rela * rel_end; |
| 2336 | struct elf32_mb_link_hash_table *htab; |
| 2337 | asection *sreloc = NULL; |
| 2338 | |
| 2339 | if (bfd_link_relocatable (info)) |
| 2340 | return TRUE; |
| 2341 | |
| 2342 | htab = elf32_mb_hash_table (info); |
| 2343 | if (htab == NULL) |
| 2344 | return FALSE; |
| 2345 | |
| 2346 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 2347 | sym_hashes = elf_sym_hashes (abfd); |
| 2348 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 2349 | if (!elf_bad_symtab (abfd)) |
| 2350 | sym_hashes_end -= symtab_hdr->sh_info; |
| 2351 | |
| 2352 | rel_end = relocs + sec->reloc_count; |
| 2353 | |
| 2354 | for (rel = relocs; rel < rel_end; rel++) |
| 2355 | { |
| 2356 | unsigned int r_type; |
| 2357 | struct elf_link_hash_entry * h; |
| 2358 | unsigned long r_symndx; |
| 2359 | unsigned char tls_type = 0; |
| 2360 | |
| 2361 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2362 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2363 | |
| 2364 | if (r_symndx < symtab_hdr->sh_info) |
| 2365 | h = NULL; |
| 2366 | else |
| 2367 | { |
| 2368 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; |
| 2369 | while (h->root.type == bfd_link_hash_indirect |
| 2370 | || h->root.type == bfd_link_hash_warning) |
| 2371 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2372 | } |
| 2373 | |
| 2374 | switch (r_type) |
| 2375 | { |
| 2376 | /* This relocation describes the C++ object vtable hierarchy. |
| 2377 | Reconstruct it for later use during GC. */ |
| 2378 | case R_MICROBLAZE_GNU_VTINHERIT: |
| 2379 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 2380 | return FALSE; |
| 2381 | break; |
| 2382 | |
| 2383 | /* This relocation describes which C++ vtable entries are actually |
| 2384 | used. Record for later use during GC. */ |
| 2385 | case R_MICROBLAZE_GNU_VTENTRY: |
| 2386 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 2387 | return FALSE; |
| 2388 | break; |
| 2389 | |
| 2390 | /* This relocation requires .plt entry. */ |
| 2391 | case R_MICROBLAZE_PLT_64: |
| 2392 | if (h != NULL) |
| 2393 | { |
| 2394 | h->needs_plt = 1; |
| 2395 | h->plt.refcount += 1; |
| 2396 | } |
| 2397 | break; |
| 2398 | |
| 2399 | /* This relocation requires .got entry. */ |
| 2400 | case R_MICROBLAZE_TLSGD: |
| 2401 | tls_type |= (TLS_TLS | TLS_GD); |
| 2402 | goto dogottls; |
| 2403 | case R_MICROBLAZE_TLSLD: |
| 2404 | tls_type |= (TLS_TLS | TLS_LD); |
| 2405 | /* Fall through. */ |
| 2406 | dogottls: |
| 2407 | sec->has_tls_reloc = 1; |
| 2408 | /* Fall through. */ |
| 2409 | case R_MICROBLAZE_GOT_64: |
| 2410 | if (htab->elf.sgot == NULL) |
| 2411 | { |
| 2412 | if (htab->elf.dynobj == NULL) |
| 2413 | htab->elf.dynobj = abfd; |
| 2414 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| 2415 | return FALSE; |
| 2416 | } |
| 2417 | if (h != NULL) |
| 2418 | { |
| 2419 | h->got.refcount += 1; |
| 2420 | elf32_mb_hash_entry (h)->tls_mask |= tls_type; |
| 2421 | } |
| 2422 | else |
| 2423 | { |
| 2424 | if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) ) |
| 2425 | return FALSE; |
| 2426 | } |
| 2427 | break; |
| 2428 | |
| 2429 | case R_MICROBLAZE_GOTOFF_64: |
| 2430 | case R_MICROBLAZE_GOTOFF_32: |
| 2431 | if (htab->elf.sgot == NULL) |
| 2432 | { |
| 2433 | if (htab->elf.dynobj == NULL) |
| 2434 | htab->elf.dynobj = abfd; |
| 2435 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| 2436 | return FALSE; |
| 2437 | } |
| 2438 | break; |
| 2439 | |
| 2440 | case R_MICROBLAZE_64: |
| 2441 | case R_MICROBLAZE_64_PCREL: |
| 2442 | case R_MICROBLAZE_32: |
| 2443 | { |
| 2444 | if (h != NULL && !bfd_link_pic (info)) |
| 2445 | { |
| 2446 | /* we may need a copy reloc. */ |
| 2447 | h->non_got_ref = 1; |
| 2448 | |
| 2449 | /* we may also need a .plt entry. */ |
| 2450 | h->plt.refcount += 1; |
| 2451 | if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL) |
| 2452 | h->pointer_equality_needed = 1; |
| 2453 | } |
| 2454 | |
| 2455 | |
| 2456 | /* If we are creating a shared library, and this is a reloc |
| 2457 | against a global symbol, or a non PC relative reloc |
| 2458 | against a local symbol, then we need to copy the reloc |
| 2459 | into the shared library. However, if we are linking with |
| 2460 | -Bsymbolic, we do not need to copy a reloc against a |
| 2461 | global symbol which is defined in an object we are |
| 2462 | including in the link (i.e., DEF_REGULAR is set). At |
| 2463 | this point we have not seen all the input files, so it is |
| 2464 | possible that DEF_REGULAR is not set now but will be set |
| 2465 | later (it is never cleared). In case of a weak definition, |
| 2466 | DEF_REGULAR may be cleared later by a strong definition in |
| 2467 | a shared library. We account for that possibility below by |
| 2468 | storing information in the relocs_copied field of the hash |
| 2469 | table entry. A similar situation occurs when creating |
| 2470 | shared libraries and symbol visibility changes render the |
| 2471 | symbol local. |
| 2472 | |
| 2473 | If on the other hand, we are creating an executable, we |
| 2474 | may need to keep relocations for symbols satisfied by a |
| 2475 | dynamic library if we manage to avoid copy relocs for the |
| 2476 | symbol. */ |
| 2477 | |
| 2478 | if ((bfd_link_pic (info) |
| 2479 | && (sec->flags & SEC_ALLOC) != 0 |
| 2480 | && (r_type != R_MICROBLAZE_64_PCREL |
| 2481 | || (h != NULL |
| 2482 | && (! info->symbolic |
| 2483 | || h->root.type == bfd_link_hash_defweak |
| 2484 | || !h->def_regular)))) |
| 2485 | || (!bfd_link_pic (info) |
| 2486 | && (sec->flags & SEC_ALLOC) != 0 |
| 2487 | && h != NULL |
| 2488 | && (h->root.type == bfd_link_hash_defweak |
| 2489 | || !h->def_regular))) |
| 2490 | { |
| 2491 | struct elf_dyn_relocs *p; |
| 2492 | struct elf_dyn_relocs **head; |
| 2493 | |
| 2494 | /* When creating a shared object, we must copy these |
| 2495 | relocs into the output file. We create a reloc |
| 2496 | section in dynobj and make room for the reloc. */ |
| 2497 | |
| 2498 | if (sreloc == NULL) |
| 2499 | { |
| 2500 | bfd *dynobj; |
| 2501 | |
| 2502 | if (htab->elf.dynobj == NULL) |
| 2503 | htab->elf.dynobj = abfd; |
| 2504 | dynobj = htab->elf.dynobj; |
| 2505 | |
| 2506 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, |
| 2507 | 2, abfd, 1); |
| 2508 | if (sreloc == NULL) |
| 2509 | return FALSE; |
| 2510 | } |
| 2511 | |
| 2512 | /* If this is a global symbol, we count the number of |
| 2513 | relocations we need for this symbol. */ |
| 2514 | if (h != NULL) |
| 2515 | head = &h->dyn_relocs; |
| 2516 | else |
| 2517 | { |
| 2518 | /* Track dynamic relocs needed for local syms too. |
| 2519 | We really need local syms available to do this |
| 2520 | easily. Oh well. */ |
| 2521 | |
| 2522 | asection *s; |
| 2523 | Elf_Internal_Sym *isym; |
| 2524 | void *vpp; |
| 2525 | |
| 2526 | isym = bfd_sym_from_r_symndx (&htab->sym_sec, |
| 2527 | abfd, r_symndx); |
| 2528 | if (isym == NULL) |
| 2529 | return FALSE; |
| 2530 | |
| 2531 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2532 | if (s == NULL) |
| 2533 | return FALSE; |
| 2534 | |
| 2535 | vpp = &elf_section_data (s)->local_dynrel; |
| 2536 | head = (struct elf_dyn_relocs **) vpp; |
| 2537 | } |
| 2538 | |
| 2539 | p = *head; |
| 2540 | if (p == NULL || p->sec != sec) |
| 2541 | { |
| 2542 | size_t amt = sizeof *p; |
| 2543 | p = ((struct elf_dyn_relocs *) |
| 2544 | bfd_alloc (htab->elf.dynobj, amt)); |
| 2545 | if (p == NULL) |
| 2546 | return FALSE; |
| 2547 | p->next = *head; |
| 2548 | *head = p; |
| 2549 | p->sec = sec; |
| 2550 | p->count = 0; |
| 2551 | p->pc_count = 0; |
| 2552 | } |
| 2553 | |
| 2554 | p->count += 1; |
| 2555 | if (r_type == R_MICROBLAZE_64_PCREL) |
| 2556 | p->pc_count += 1; |
| 2557 | } |
| 2558 | } |
| 2559 | break; |
| 2560 | } |
| 2561 | } |
| 2562 | |
| 2563 | return TRUE; |
| 2564 | } |
| 2565 | |
| 2566 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2567 | |
| 2568 | static void |
| 2569 | microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 2570 | struct elf_link_hash_entry *dir, |
| 2571 | struct elf_link_hash_entry *ind) |
| 2572 | { |
| 2573 | struct elf32_mb_link_hash_entry *edir, *eind; |
| 2574 | |
| 2575 | edir = (struct elf32_mb_link_hash_entry *) dir; |
| 2576 | eind = (struct elf32_mb_link_hash_entry *) ind; |
| 2577 | |
| 2578 | edir->tls_mask |= eind->tls_mask; |
| 2579 | |
| 2580 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2581 | } |
| 2582 | |
| 2583 | static bfd_boolean |
| 2584 | microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 2585 | struct elf_link_hash_entry *h) |
| 2586 | { |
| 2587 | struct elf32_mb_link_hash_table *htab; |
| 2588 | asection *s, *srel; |
| 2589 | unsigned int power_of_two; |
| 2590 | |
| 2591 | htab = elf32_mb_hash_table (info); |
| 2592 | if (htab == NULL) |
| 2593 | return FALSE; |
| 2594 | |
| 2595 | /* If this is a function, put it in the procedure linkage table. We |
| 2596 | will fill in the contents of the procedure linkage table later, |
| 2597 | when we know the address of the .got section. */ |
| 2598 | if (h->type == STT_FUNC |
| 2599 | || h->needs_plt) |
| 2600 | { |
| 2601 | if (h->plt.refcount <= 0 |
| 2602 | || SYMBOL_CALLS_LOCAL (info, h) |
| 2603 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 2604 | && h->root.type == bfd_link_hash_undefweak)) |
| 2605 | { |
| 2606 | /* This case can occur if we saw a PLT reloc in an input |
| 2607 | file, but the symbol was never referred to by a dynamic |
| 2608 | object, or if all references were garbage collected. In |
| 2609 | such a case, we don't actually need to build a procedure |
| 2610 | linkage table, and we can just do a PC32 reloc instead. */ |
| 2611 | h->plt.offset = (bfd_vma) -1; |
| 2612 | h->needs_plt = 0; |
| 2613 | } |
| 2614 | |
| 2615 | return TRUE; |
| 2616 | } |
| 2617 | else |
| 2618 | /* It's possible that we incorrectly decided a .plt reloc was |
| 2619 | needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in |
| 2620 | check_relocs. We can't decide accurately between function and |
| 2621 | non-function syms in check-relocs; Objects loaded later in |
| 2622 | the link may change h->type. So fix it now. */ |
| 2623 | h->plt.offset = (bfd_vma) -1; |
| 2624 | |
| 2625 | /* If this is a weak symbol, and there is a real definition, the |
| 2626 | processor independent code will have arranged for us to see the |
| 2627 | real definition first, and we can just use the same value. */ |
| 2628 | if (h->is_weakalias) |
| 2629 | { |
| 2630 | struct elf_link_hash_entry *def = weakdef (h); |
| 2631 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 2632 | h->root.u.def.section = def->root.u.def.section; |
| 2633 | h->root.u.def.value = def->root.u.def.value; |
| 2634 | return TRUE; |
| 2635 | } |
| 2636 | |
| 2637 | /* This is a reference to a symbol defined by a dynamic object which |
| 2638 | is not a function. */ |
| 2639 | |
| 2640 | /* If we are creating a shared library, we must presume that the |
| 2641 | only references to the symbol are via the global offset table. |
| 2642 | For such cases we need not do anything here; the relocations will |
| 2643 | be handled correctly by relocate_section. */ |
| 2644 | if (bfd_link_pic (info)) |
| 2645 | return TRUE; |
| 2646 | |
| 2647 | /* If there are no references to this symbol that do not use the |
| 2648 | GOT, we don't need to generate a copy reloc. */ |
| 2649 | if (!h->non_got_ref) |
| 2650 | return TRUE; |
| 2651 | |
| 2652 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 2653 | if (info->nocopyreloc) |
| 2654 | { |
| 2655 | h->non_got_ref = 0; |
| 2656 | return TRUE; |
| 2657 | } |
| 2658 | |
| 2659 | /* If we don't find any dynamic relocs in read-only sections, then |
| 2660 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 2661 | if (!_bfd_elf_readonly_dynrelocs (h)) |
| 2662 | { |
| 2663 | h->non_got_ref = 0; |
| 2664 | return TRUE; |
| 2665 | } |
| 2666 | |
| 2667 | /* We must allocate the symbol in our .dynbss section, which will |
| 2668 | become part of the .bss section of the executable. There will be |
| 2669 | an entry for this symbol in the .dynsym section. The dynamic |
| 2670 | object will contain position independent code, so all references |
| 2671 | from the dynamic object to this symbol will go through the global |
| 2672 | offset table. The dynamic linker will use the .dynsym entry to |
| 2673 | determine the address it must put in the global offset table, so |
| 2674 | both the dynamic object and the regular object will refer to the |
| 2675 | same memory location for the variable. */ |
| 2676 | |
| 2677 | /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker |
| 2678 | to copy the initial value out of the dynamic object and into the |
| 2679 | runtime process image. */ |
| 2680 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 2681 | { |
| 2682 | s = htab->elf.sdynrelro; |
| 2683 | srel = htab->elf.sreldynrelro; |
| 2684 | } |
| 2685 | else |
| 2686 | { |
| 2687 | s = htab->elf.sdynbss; |
| 2688 | srel = htab->elf.srelbss; |
| 2689 | } |
| 2690 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 2691 | { |
| 2692 | srel->size += sizeof (Elf32_External_Rela); |
| 2693 | h->needs_copy = 1; |
| 2694 | } |
| 2695 | |
| 2696 | /* We need to figure out the alignment required for this symbol. I |
| 2697 | have no idea how ELF linkers handle this. */ |
| 2698 | power_of_two = bfd_log2 (h->size); |
| 2699 | if (power_of_two > 3) |
| 2700 | power_of_two = 3; |
| 2701 | |
| 2702 | /* Apply the required alignment. */ |
| 2703 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 2704 | if (power_of_two > s->alignment_power) |
| 2705 | { |
| 2706 | if (!bfd_set_section_alignment (s, power_of_two)) |
| 2707 | return FALSE; |
| 2708 | } |
| 2709 | |
| 2710 | /* Define the symbol as being at this point in the section. */ |
| 2711 | h->root.u.def.section = s; |
| 2712 | h->root.u.def.value = s->size; |
| 2713 | |
| 2714 | /* Increment the section size to make room for the symbol. */ |
| 2715 | s->size += h->size; |
| 2716 | return TRUE; |
| 2717 | } |
| 2718 | |
| 2719 | /* Allocate space in .plt, .got and associated reloc sections for |
| 2720 | dynamic relocs. */ |
| 2721 | |
| 2722 | static bfd_boolean |
| 2723 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat) |
| 2724 | { |
| 2725 | struct bfd_link_info *info; |
| 2726 | struct elf32_mb_link_hash_table *htab; |
| 2727 | struct elf32_mb_link_hash_entry *eh; |
| 2728 | struct elf_dyn_relocs *p; |
| 2729 | |
| 2730 | if (h->root.type == bfd_link_hash_indirect) |
| 2731 | return TRUE; |
| 2732 | |
| 2733 | info = (struct bfd_link_info *) dat; |
| 2734 | htab = elf32_mb_hash_table (info); |
| 2735 | if (htab == NULL) |
| 2736 | return FALSE; |
| 2737 | |
| 2738 | if (htab->elf.dynamic_sections_created |
| 2739 | && h->plt.refcount > 0) |
| 2740 | { |
| 2741 | /* Make sure this symbol is output as a dynamic symbol. |
| 2742 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2743 | if (h->dynindx == -1 |
| 2744 | && !h->forced_local) |
| 2745 | { |
| 2746 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2747 | return FALSE; |
| 2748 | } |
| 2749 | |
| 2750 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
| 2751 | { |
| 2752 | asection *s = htab->elf.splt; |
| 2753 | |
| 2754 | /* The first entry in .plt is reserved. */ |
| 2755 | if (s->size == 0) |
| 2756 | s->size = PLT_ENTRY_SIZE; |
| 2757 | |
| 2758 | h->plt.offset = s->size; |
| 2759 | |
| 2760 | /* If this symbol is not defined in a regular file, and we are |
| 2761 | not generating a shared library, then set the symbol to this |
| 2762 | location in the .plt. This is required to make function |
| 2763 | pointers compare as equal between the normal executable and |
| 2764 | the shared library. */ |
| 2765 | if (! bfd_link_pic (info) |
| 2766 | && !h->def_regular) |
| 2767 | { |
| 2768 | h->root.u.def.section = s; |
| 2769 | h->root.u.def.value = h->plt.offset; |
| 2770 | } |
| 2771 | |
| 2772 | /* Make room for this entry. */ |
| 2773 | s->size += PLT_ENTRY_SIZE; |
| 2774 | |
| 2775 | /* We also need to make an entry in the .got.plt section, which |
| 2776 | will be placed in the .got section by the linker script. */ |
| 2777 | htab->elf.sgotplt->size += 4; |
| 2778 | |
| 2779 | /* We also need to make an entry in the .rel.plt section. */ |
| 2780 | htab->elf.srelplt->size += sizeof (Elf32_External_Rela); |
| 2781 | } |
| 2782 | else |
| 2783 | { |
| 2784 | h->plt.offset = (bfd_vma) -1; |
| 2785 | h->needs_plt = 0; |
| 2786 | } |
| 2787 | } |
| 2788 | else |
| 2789 | { |
| 2790 | h->plt.offset = (bfd_vma) -1; |
| 2791 | h->needs_plt = 0; |
| 2792 | } |
| 2793 | |
| 2794 | eh = (struct elf32_mb_link_hash_entry *) h; |
| 2795 | if (h->got.refcount > 0) |
| 2796 | { |
| 2797 | unsigned int need; |
| 2798 | asection *s; |
| 2799 | |
| 2800 | /* Make sure this symbol is output as a dynamic symbol. |
| 2801 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2802 | if (h->dynindx == -1 |
| 2803 | && !h->forced_local) |
| 2804 | { |
| 2805 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2806 | return FALSE; |
| 2807 | } |
| 2808 | |
| 2809 | need = 0; |
| 2810 | if ((eh->tls_mask & TLS_TLS) != 0) |
| 2811 | { |
| 2812 | /* Handle TLS Symbol */ |
| 2813 | if ((eh->tls_mask & TLS_LD) != 0) |
| 2814 | { |
| 2815 | if (!eh->elf.def_dynamic) |
| 2816 | /* We'll just use htab->tlsld_got.offset. This should |
| 2817 | always be the case. It's a little odd if we have |
| 2818 | a local dynamic reloc against a non-local symbol. */ |
| 2819 | htab->tlsld_got.refcount += 1; |
| 2820 | else |
| 2821 | need += 8; |
| 2822 | } |
| 2823 | if ((eh->tls_mask & TLS_GD) != 0) |
| 2824 | need += 8; |
| 2825 | } |
| 2826 | else |
| 2827 | { |
| 2828 | /* Regular (non-TLS) symbol */ |
| 2829 | need += 4; |
| 2830 | } |
| 2831 | if (need == 0) |
| 2832 | { |
| 2833 | h->got.offset = (bfd_vma) -1; |
| 2834 | } |
| 2835 | else |
| 2836 | { |
| 2837 | s = htab->elf.sgot; |
| 2838 | h->got.offset = s->size; |
| 2839 | s->size += need; |
| 2840 | htab->elf.srelgot->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 2841 | } |
| 2842 | } |
| 2843 | else |
| 2844 | h->got.offset = (bfd_vma) -1; |
| 2845 | |
| 2846 | if (h->dyn_relocs == NULL) |
| 2847 | return TRUE; |
| 2848 | |
| 2849 | /* In the shared -Bsymbolic case, discard space allocated for |
| 2850 | dynamic pc-relative relocs against symbols which turn out to be |
| 2851 | defined in regular objects. For the normal shared case, discard |
| 2852 | space for pc-relative relocs that have become local due to symbol |
| 2853 | visibility changes. */ |
| 2854 | |
| 2855 | if (bfd_link_pic (info)) |
| 2856 | { |
| 2857 | if (h->def_regular |
| 2858 | && (h->forced_local |
| 2859 | || info->symbolic)) |
| 2860 | { |
| 2861 | struct elf_dyn_relocs **pp; |
| 2862 | |
| 2863 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
| 2864 | { |
| 2865 | p->count -= p->pc_count; |
| 2866 | p->pc_count = 0; |
| 2867 | if (p->count == 0) |
| 2868 | *pp = p->next; |
| 2869 | else |
| 2870 | pp = &p->next; |
| 2871 | } |
| 2872 | } |
| 2873 | else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 2874 | h->dyn_relocs = NULL; |
| 2875 | } |
| 2876 | else |
| 2877 | { |
| 2878 | /* For the non-shared case, discard space for relocs against |
| 2879 | symbols which turn out to need copy relocs or are not |
| 2880 | dynamic. */ |
| 2881 | |
| 2882 | if (!h->non_got_ref |
| 2883 | && ((h->def_dynamic |
| 2884 | && !h->def_regular) |
| 2885 | || (htab->elf.dynamic_sections_created |
| 2886 | && (h->root.type == bfd_link_hash_undefweak |
| 2887 | || h->root.type == bfd_link_hash_undefined)))) |
| 2888 | { |
| 2889 | /* Make sure this symbol is output as a dynamic symbol. |
| 2890 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2891 | if (h->dynindx == -1 |
| 2892 | && !h->forced_local) |
| 2893 | { |
| 2894 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2895 | return FALSE; |
| 2896 | } |
| 2897 | |
| 2898 | /* If that succeeded, we know we'll be keeping all the |
| 2899 | relocs. */ |
| 2900 | if (h->dynindx != -1) |
| 2901 | goto keep; |
| 2902 | } |
| 2903 | |
| 2904 | h->dyn_relocs = NULL; |
| 2905 | |
| 2906 | keep: ; |
| 2907 | } |
| 2908 | |
| 2909 | /* Finally, allocate space. */ |
| 2910 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
| 2911 | { |
| 2912 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 2913 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 2914 | } |
| 2915 | |
| 2916 | return TRUE; |
| 2917 | } |
| 2918 | |
| 2919 | /* Set the sizes of the dynamic sections. */ |
| 2920 | |
| 2921 | static bfd_boolean |
| 2922 | microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2923 | struct bfd_link_info *info) |
| 2924 | { |
| 2925 | struct elf32_mb_link_hash_table *htab; |
| 2926 | bfd *dynobj; |
| 2927 | asection *s; |
| 2928 | bfd *ibfd; |
| 2929 | |
| 2930 | htab = elf32_mb_hash_table (info); |
| 2931 | if (htab == NULL) |
| 2932 | return FALSE; |
| 2933 | |
| 2934 | dynobj = htab->elf.dynobj; |
| 2935 | BFD_ASSERT (dynobj != NULL); |
| 2936 | |
| 2937 | /* Set up .got offsets for local syms, and space for local dynamic |
| 2938 | relocs. */ |
| 2939 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 2940 | { |
| 2941 | bfd_signed_vma *local_got; |
| 2942 | bfd_signed_vma *end_local_got; |
| 2943 | bfd_size_type locsymcount; |
| 2944 | Elf_Internal_Shdr *symtab_hdr; |
| 2945 | unsigned char *lgot_masks; |
| 2946 | asection *srel; |
| 2947 | |
| 2948 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 2949 | continue; |
| 2950 | |
| 2951 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2952 | { |
| 2953 | struct elf_dyn_relocs *p; |
| 2954 | |
| 2955 | for (p = ((struct elf_dyn_relocs *) |
| 2956 | elf_section_data (s)->local_dynrel); |
| 2957 | p != NULL; |
| 2958 | p = p->next) |
| 2959 | { |
| 2960 | if (!bfd_is_abs_section (p->sec) |
| 2961 | && bfd_is_abs_section (p->sec->output_section)) |
| 2962 | { |
| 2963 | /* Input section has been discarded, either because |
| 2964 | it is a copy of a linkonce section or due to |
| 2965 | linker script /DISCARD/, so we'll be discarding |
| 2966 | the relocs too. */ |
| 2967 | } |
| 2968 | else if (p->count != 0) |
| 2969 | { |
| 2970 | srel = elf_section_data (p->sec)->sreloc; |
| 2971 | srel->size += p->count * sizeof (Elf32_External_Rela); |
| 2972 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2973 | info->flags |= DF_TEXTREL; |
| 2974 | } |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | local_got = elf_local_got_refcounts (ibfd); |
| 2979 | if (!local_got) |
| 2980 | continue; |
| 2981 | |
| 2982 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2983 | locsymcount = symtab_hdr->sh_info; |
| 2984 | end_local_got = local_got + locsymcount; |
| 2985 | lgot_masks = (unsigned char *) end_local_got; |
| 2986 | s = htab->elf.sgot; |
| 2987 | srel = htab->elf.srelgot; |
| 2988 | |
| 2989 | for (; local_got < end_local_got; ++local_got, ++lgot_masks) |
| 2990 | { |
| 2991 | if (*local_got > 0) |
| 2992 | { |
| 2993 | unsigned int need = 0; |
| 2994 | if ((*lgot_masks & TLS_TLS) != 0) |
| 2995 | { |
| 2996 | if ((*lgot_masks & TLS_GD) != 0) |
| 2997 | need += 8; |
| 2998 | if ((*lgot_masks & TLS_LD) != 0) |
| 2999 | htab->tlsld_got.refcount += 1; |
| 3000 | } |
| 3001 | else |
| 3002 | need += 4; |
| 3003 | |
| 3004 | if (need == 0) |
| 3005 | { |
| 3006 | *local_got = (bfd_vma) -1; |
| 3007 | } |
| 3008 | else |
| 3009 | { |
| 3010 | *local_got = s->size; |
| 3011 | s->size += need; |
| 3012 | if (bfd_link_pic (info)) |
| 3013 | srel->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 3014 | } |
| 3015 | } |
| 3016 | else |
| 3017 | *local_got = (bfd_vma) -1; |
| 3018 | } |
| 3019 | } |
| 3020 | |
| 3021 | /* Allocate global sym .plt and .got entries, and space for global |
| 3022 | sym dynamic relocs. */ |
| 3023 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); |
| 3024 | |
| 3025 | if (htab->tlsld_got.refcount > 0) |
| 3026 | { |
| 3027 | htab->tlsld_got.offset = htab->elf.sgot->size; |
| 3028 | htab->elf.sgot->size += 8; |
| 3029 | if (bfd_link_pic (info)) |
| 3030 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 3031 | } |
| 3032 | else |
| 3033 | htab->tlsld_got.offset = (bfd_vma) -1; |
| 3034 | |
| 3035 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3036 | { |
| 3037 | /* Make space for the trailing nop in .plt. */ |
| 3038 | if (htab->elf.splt->size > 0) |
| 3039 | htab->elf.splt->size += 4; |
| 3040 | } |
| 3041 | |
| 3042 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 3043 | determined the sizes of the various dynamic sections. Allocate |
| 3044 | memory for them. */ |
| 3045 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 3046 | { |
| 3047 | const char *name; |
| 3048 | bfd_boolean strip = FALSE; |
| 3049 | |
| 3050 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 3051 | continue; |
| 3052 | |
| 3053 | /* It's OK to base decisions on the section name, because none |
| 3054 | of the dynobj section names depend upon the input files. */ |
| 3055 | name = bfd_section_name (s); |
| 3056 | |
| 3057 | if (strncmp (name, ".rela", 5) == 0) |
| 3058 | { |
| 3059 | if (s->size == 0) |
| 3060 | { |
| 3061 | /* If we don't need this section, strip it from the |
| 3062 | output file. This is to handle .rela.bss and |
| 3063 | .rela.plt. We must create it in |
| 3064 | create_dynamic_sections, because it must be created |
| 3065 | before the linker maps input sections to output |
| 3066 | sections. The linker does that before |
| 3067 | adjust_dynamic_symbol is called, and it is that |
| 3068 | function which decides whether anything needs to go |
| 3069 | into these sections. */ |
| 3070 | strip = TRUE; |
| 3071 | } |
| 3072 | else |
| 3073 | { |
| 3074 | /* We use the reloc_count field as a counter if we need |
| 3075 | to copy relocs into the output file. */ |
| 3076 | s->reloc_count = 0; |
| 3077 | } |
| 3078 | } |
| 3079 | else if (s != htab->elf.splt |
| 3080 | && s != htab->elf.sgot |
| 3081 | && s != htab->elf.sgotplt |
| 3082 | && s != htab->elf.sdynbss |
| 3083 | && s != htab->elf.sdynrelro) |
| 3084 | { |
| 3085 | /* It's not one of our sections, so don't allocate space. */ |
| 3086 | continue; |
| 3087 | } |
| 3088 | |
| 3089 | if (strip) |
| 3090 | { |
| 3091 | s->flags |= SEC_EXCLUDE; |
| 3092 | continue; |
| 3093 | } |
| 3094 | |
| 3095 | /* Allocate memory for the section contents. */ |
| 3096 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
| 3097 | Unused entries should be reclaimed before the section's contents |
| 3098 | are written out, but at the moment this does not happen. Thus in |
| 3099 | order to prevent writing out garbage, we initialise the section's |
| 3100 | contents to zero. */ |
| 3101 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 3102 | if (s->contents == NULL && s->size != 0) |
| 3103 | return FALSE; |
| 3104 | } |
| 3105 | |
| 3106 | /* ??? Force DF_BIND_NOW? */ |
| 3107 | info->flags |= DF_BIND_NOW; |
| 3108 | return _bfd_elf_add_dynamic_tags (output_bfd, info, TRUE); |
| 3109 | } |
| 3110 | |
| 3111 | /* Finish up dynamic symbol handling. We set the contents of various |
| 3112 | dynamic sections here. */ |
| 3113 | |
| 3114 | static bfd_boolean |
| 3115 | microblaze_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 3116 | struct bfd_link_info *info, |
| 3117 | struct elf_link_hash_entry *h, |
| 3118 | Elf_Internal_Sym *sym) |
| 3119 | { |
| 3120 | struct elf32_mb_link_hash_table *htab; |
| 3121 | struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h); |
| 3122 | |
| 3123 | htab = elf32_mb_hash_table (info); |
| 3124 | if (htab == NULL) |
| 3125 | return FALSE; |
| 3126 | |
| 3127 | if (h->plt.offset != (bfd_vma) -1) |
| 3128 | { |
| 3129 | asection *splt; |
| 3130 | asection *srela; |
| 3131 | asection *sgotplt; |
| 3132 | Elf_Internal_Rela rela; |
| 3133 | bfd_byte *loc; |
| 3134 | bfd_vma plt_index; |
| 3135 | bfd_vma got_offset; |
| 3136 | bfd_vma got_addr; |
| 3137 | |
| 3138 | /* This symbol has an entry in the procedure linkage table. Set |
| 3139 | it up. */ |
| 3140 | BFD_ASSERT (h->dynindx != -1); |
| 3141 | |
| 3142 | splt = htab->elf.splt; |
| 3143 | srela = htab->elf.srelplt; |
| 3144 | sgotplt = htab->elf.sgotplt; |
| 3145 | BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL); |
| 3146 | |
| 3147 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */ |
| 3148 | got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */ |
| 3149 | got_addr = got_offset; |
| 3150 | |
| 3151 | /* For non-PIC objects we need absolute address of the GOT entry. */ |
| 3152 | if (!bfd_link_pic (info)) |
| 3153 | got_addr += sgotplt->output_section->vma + sgotplt->output_offset; |
| 3154 | |
| 3155 | /* Fill in the entry in the procedure linkage table. */ |
| 3156 | bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff), |
| 3157 | splt->contents + h->plt.offset); |
| 3158 | if (bfd_link_pic (info)) |
| 3159 | bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff), |
| 3160 | splt->contents + h->plt.offset + 4); |
| 3161 | else |
| 3162 | bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff), |
| 3163 | splt->contents + h->plt.offset + 4); |
| 3164 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2, |
| 3165 | splt->contents + h->plt.offset + 8); |
| 3166 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3, |
| 3167 | splt->contents + h->plt.offset + 12); |
| 3168 | |
| 3169 | /* Any additions to the .got section??? */ |
| 3170 | /* bfd_put_32 (output_bfd, |
| 3171 | splt->output_section->vma + splt->output_offset + h->plt.offset + 4, |
| 3172 | sgotplt->contents + got_offset); */ |
| 3173 | |
| 3174 | /* Fill in the entry in the .rela.plt section. */ |
| 3175 | rela.r_offset = (sgotplt->output_section->vma |
| 3176 | + sgotplt->output_offset |
| 3177 | + got_offset); |
| 3178 | rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT); |
| 3179 | rela.r_addend = 0; |
| 3180 | loc = srela->contents; |
| 3181 | loc += plt_index * sizeof (Elf32_External_Rela); |
| 3182 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 3183 | |
| 3184 | if (!h->def_regular) |
| 3185 | { |
| 3186 | /* Mark the symbol as undefined, rather than as defined in |
| 3187 | the .plt section. Zero the value. */ |
| 3188 | sym->st_shndx = SHN_UNDEF; |
| 3189 | sym->st_value = 0; |
| 3190 | } |
| 3191 | } |
| 3192 | |
| 3193 | /* h->got.refcount to be checked ? */ |
| 3194 | if (h->got.offset != (bfd_vma) -1 && |
| 3195 | ! ((h->got.offset & 1) || |
| 3196 | IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask))) |
| 3197 | { |
| 3198 | asection *sgot; |
| 3199 | asection *srela; |
| 3200 | bfd_vma offset; |
| 3201 | |
| 3202 | /* This symbol has an entry in the global offset table. Set it |
| 3203 | up. */ |
| 3204 | |
| 3205 | sgot = htab->elf.sgot; |
| 3206 | srela = htab->elf.srelgot; |
| 3207 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 3208 | |
| 3209 | offset = (sgot->output_section->vma + sgot->output_offset |
| 3210 | + (h->got.offset &~ (bfd_vma) 1)); |
| 3211 | |
| 3212 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 3213 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 3214 | the symbol was forced to be local because of a version file. |
| 3215 | The entry in the global offset table will already have been |
| 3216 | initialized in the relocate_section function. */ |
| 3217 | if (bfd_link_pic (info) |
| 3218 | && ((info->symbolic && h->def_regular) |
| 3219 | || h->dynindx == -1)) |
| 3220 | { |
| 3221 | asection *sec = h->root.u.def.section; |
| 3222 | bfd_vma value; |
| 3223 | |
| 3224 | value = h->root.u.def.value; |
| 3225 | if (sec->output_section != NULL) |
| 3226 | /* PR 21180: If the output section is NULL, then the symbol is no |
| 3227 | longer needed, and in theory the GOT entry is redundant. But |
| 3228 | it is too late to change our minds now... */ |
| 3229 | value += sec->output_section->vma + sec->output_offset; |
| 3230 | |
| 3231 | microblaze_elf_output_dynamic_relocation (output_bfd, |
| 3232 | srela, srela->reloc_count++, |
| 3233 | /* symindex= */ 0, |
| 3234 | R_MICROBLAZE_REL, offset, |
| 3235 | value); |
| 3236 | } |
| 3237 | else |
| 3238 | { |
| 3239 | microblaze_elf_output_dynamic_relocation (output_bfd, |
| 3240 | srela, srela->reloc_count++, |
| 3241 | h->dynindx, |
| 3242 | R_MICROBLAZE_GLOB_DAT, |
| 3243 | offset, 0); |
| 3244 | } |
| 3245 | |
| 3246 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 3247 | sgot->contents + (h->got.offset &~ (bfd_vma) 1)); |
| 3248 | } |
| 3249 | |
| 3250 | if (h->needs_copy) |
| 3251 | { |
| 3252 | asection *s; |
| 3253 | Elf_Internal_Rela rela; |
| 3254 | bfd_byte *loc; |
| 3255 | |
| 3256 | /* This symbols needs a copy reloc. Set it up. */ |
| 3257 | |
| 3258 | BFD_ASSERT (h->dynindx != -1); |
| 3259 | |
| 3260 | rela.r_offset = (h->root.u.def.value |
| 3261 | + h->root.u.def.section->output_section->vma |
| 3262 | + h->root.u.def.section->output_offset); |
| 3263 | rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY); |
| 3264 | rela.r_addend = 0; |
| 3265 | if (h->root.u.def.section == htab->elf.sdynrelro) |
| 3266 | s = htab->elf.sreldynrelro; |
| 3267 | else |
| 3268 | s = htab->elf.srelbss; |
| 3269 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3270 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 3271 | } |
| 3272 | |
| 3273 | /* Mark some specially defined symbols as absolute. */ |
| 3274 | if (h == htab->elf.hdynamic |
| 3275 | || h == htab->elf.hgot |
| 3276 | || h == htab->elf.hplt) |
| 3277 | sym->st_shndx = SHN_ABS; |
| 3278 | |
| 3279 | return TRUE; |
| 3280 | } |
| 3281 | |
| 3282 | |
| 3283 | /* Finish up the dynamic sections. */ |
| 3284 | |
| 3285 | static bfd_boolean |
| 3286 | microblaze_elf_finish_dynamic_sections (bfd *output_bfd, |
| 3287 | struct bfd_link_info *info) |
| 3288 | { |
| 3289 | bfd *dynobj; |
| 3290 | asection *sdyn, *sgot; |
| 3291 | struct elf32_mb_link_hash_table *htab; |
| 3292 | |
| 3293 | htab = elf32_mb_hash_table (info); |
| 3294 | if (htab == NULL) |
| 3295 | return FALSE; |
| 3296 | |
| 3297 | dynobj = htab->elf.dynobj; |
| 3298 | |
| 3299 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 3300 | |
| 3301 | if (htab->elf.dynamic_sections_created) |
| 3302 | { |
| 3303 | asection *splt; |
| 3304 | Elf32_External_Dyn *dyncon, *dynconend; |
| 3305 | |
| 3306 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 3307 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 3308 | for (; dyncon < dynconend; dyncon++) |
| 3309 | { |
| 3310 | Elf_Internal_Dyn dyn; |
| 3311 | asection *s; |
| 3312 | bfd_boolean size; |
| 3313 | |
| 3314 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 3315 | |
| 3316 | switch (dyn.d_tag) |
| 3317 | { |
| 3318 | case DT_PLTGOT: |
| 3319 | s = htab->elf.sgotplt; |
| 3320 | size = FALSE; |
| 3321 | break; |
| 3322 | |
| 3323 | case DT_PLTRELSZ: |
| 3324 | s = htab->elf.srelplt; |
| 3325 | size = TRUE; |
| 3326 | break; |
| 3327 | |
| 3328 | case DT_JMPREL: |
| 3329 | s = htab->elf.srelplt; |
| 3330 | size = FALSE; |
| 3331 | break; |
| 3332 | |
| 3333 | default: |
| 3334 | continue; |
| 3335 | } |
| 3336 | |
| 3337 | if (s == NULL) |
| 3338 | dyn.d_un.d_val = 0; |
| 3339 | else |
| 3340 | { |
| 3341 | if (!size) |
| 3342 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 3343 | else |
| 3344 | dyn.d_un.d_val = s->size; |
| 3345 | } |
| 3346 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3347 | } |
| 3348 | |
| 3349 | splt = htab->elf.splt; |
| 3350 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 3351 | |
| 3352 | /* Clear the first entry in the procedure linkage table, |
| 3353 | and put a nop in the last four bytes. */ |
| 3354 | if (splt->size > 0) |
| 3355 | { |
| 3356 | memset (splt->contents, 0, PLT_ENTRY_SIZE); |
| 3357 | bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */, |
| 3358 | splt->contents + splt->size - 4); |
| 3359 | |
| 3360 | if (splt->output_section != bfd_abs_section_ptr) |
| 3361 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; |
| 3362 | } |
| 3363 | } |
| 3364 | |
| 3365 | /* Set the first entry in the global offset table to the address of |
| 3366 | the dynamic section. */ |
| 3367 | sgot = htab->elf.sgotplt; |
| 3368 | if (sgot && sgot->size > 0) |
| 3369 | { |
| 3370 | if (sdyn == NULL) |
| 3371 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 3372 | else |
| 3373 | bfd_put_32 (output_bfd, |
| 3374 | sdyn->output_section->vma + sdyn->output_offset, |
| 3375 | sgot->contents); |
| 3376 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 3377 | } |
| 3378 | |
| 3379 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
| 3380 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; |
| 3381 | |
| 3382 | return TRUE; |
| 3383 | } |
| 3384 | |
| 3385 | /* Hook called by the linker routine which adds symbols from an object |
| 3386 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 3387 | |
| 3388 | static bfd_boolean |
| 3389 | microblaze_elf_add_symbol_hook (bfd *abfd, |
| 3390 | struct bfd_link_info *info, |
| 3391 | Elf_Internal_Sym *sym, |
| 3392 | const char **namep ATTRIBUTE_UNUSED, |
| 3393 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 3394 | asection **secp, |
| 3395 | bfd_vma *valp) |
| 3396 | { |
| 3397 | if (sym->st_shndx == SHN_COMMON |
| 3398 | && !bfd_link_relocatable (info) |
| 3399 | && sym->st_size <= elf_gp_size (abfd)) |
| 3400 | { |
| 3401 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 3402 | put into .sbss. */ |
| 3403 | *secp = bfd_make_section_old_way (abfd, ".sbss"); |
| 3404 | if (*secp == NULL |
| 3405 | || !bfd_set_section_flags (*secp, SEC_IS_COMMON)) |
| 3406 | return FALSE; |
| 3407 | |
| 3408 | *valp = sym->st_size; |
| 3409 | } |
| 3410 | |
| 3411 | return TRUE; |
| 3412 | } |
| 3413 | |
| 3414 | #define TARGET_LITTLE_SYM microblaze_elf32_le_vec |
| 3415 | #define TARGET_LITTLE_NAME "elf32-microblazeel" |
| 3416 | |
| 3417 | #define TARGET_BIG_SYM microblaze_elf32_vec |
| 3418 | #define TARGET_BIG_NAME "elf32-microblaze" |
| 3419 | |
| 3420 | #define ELF_ARCH bfd_arch_microblaze |
| 3421 | #define ELF_TARGET_ID MICROBLAZE_ELF_DATA |
| 3422 | #define ELF_MACHINE_CODE EM_MICROBLAZE |
| 3423 | #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD |
| 3424 | #define ELF_MAXPAGESIZE 0x1000 |
| 3425 | #define elf_info_to_howto microblaze_elf_info_to_howto |
| 3426 | #define elf_info_to_howto_rel NULL |
| 3427 | |
| 3428 | #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup |
| 3429 | #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name |
| 3430 | #define elf_backend_relocate_section microblaze_elf_relocate_section |
| 3431 | #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section |
| 3432 | #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match |
| 3433 | #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup |
| 3434 | |
| 3435 | #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook |
| 3436 | #define elf_backend_check_relocs microblaze_elf_check_relocs |
| 3437 | #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol |
| 3438 | #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create |
| 3439 | #define elf_backend_can_gc_sections 1 |
| 3440 | #define elf_backend_can_refcount 1 |
| 3441 | #define elf_backend_want_got_plt 1 |
| 3442 | #define elf_backend_plt_readonly 1 |
| 3443 | #define elf_backend_got_header_size 12 |
| 3444 | #define elf_backend_want_dynrelro 1 |
| 3445 | #define elf_backend_rela_normal 1 |
| 3446 | #define elf_backend_dtrel_excludes_plt 1 |
| 3447 | |
| 3448 | #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol |
| 3449 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
| 3450 | #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections |
| 3451 | #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol |
| 3452 | #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections |
| 3453 | #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook |
| 3454 | |
| 3455 | #include "elf32-target.h" |