| 1 | /* CRIS-specific support for 32-bit ELF. |
| 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
| 3 | Contributed by Axis Communications AB. |
| 4 | Written by Hans-Peter Nilsson, based on elf32-fr30.c |
| 5 | PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 22 | MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include "bfd.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "elf-bfd.h" |
| 28 | #include "elf/cris.h" |
| 29 | #include <limits.h> |
| 30 | |
| 31 | bfd_reloc_status_type |
| 32 | cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *, |
| 33 | asection *, bfd *, char **); |
| 34 | static bfd_boolean |
| 35 | cris_elf_set_mach_from_flags (bfd *, unsigned long); |
| 36 | |
| 37 | /* Forward declarations. */ |
| 38 | static reloc_howto_type cris_elf_howto_table [] = |
| 39 | { |
| 40 | /* This reloc does nothing. */ |
| 41 | HOWTO (R_CRIS_NONE, /* type */ |
| 42 | 0, /* rightshift */ |
| 43 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 44 | 0, /* bitsize */ |
| 45 | FALSE, /* pc_relative */ |
| 46 | 0, /* bitpos */ |
| 47 | complain_overflow_dont, /* complain_on_overflow */ |
| 48 | bfd_elf_generic_reloc, /* special_function */ |
| 49 | "R_CRIS_NONE", /* name */ |
| 50 | FALSE, /* partial_inplace */ |
| 51 | 0, /* src_mask */ |
| 52 | 0, /* dst_mask */ |
| 53 | FALSE), /* pcrel_offset */ |
| 54 | |
| 55 | /* An 8 bit absolute relocation. */ |
| 56 | HOWTO (R_CRIS_8, /* type */ |
| 57 | 0, /* rightshift */ |
| 58 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 59 | 8, /* bitsize */ |
| 60 | FALSE, /* pc_relative */ |
| 61 | 0, /* bitpos */ |
| 62 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 63 | bfd_elf_generic_reloc, /* special_function */ |
| 64 | "R_CRIS_8", /* name */ |
| 65 | FALSE, /* partial_inplace */ |
| 66 | 0x0000, /* src_mask */ |
| 67 | 0x00ff, /* dst_mask */ |
| 68 | FALSE), /* pcrel_offset */ |
| 69 | |
| 70 | /* A 16 bit absolute relocation. */ |
| 71 | HOWTO (R_CRIS_16, /* type */ |
| 72 | 0, /* rightshift */ |
| 73 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 74 | 16, /* bitsize */ |
| 75 | FALSE, /* pc_relative */ |
| 76 | 0, /* bitpos */ |
| 77 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 78 | bfd_elf_generic_reloc, /* special_function */ |
| 79 | "R_CRIS_16", /* name */ |
| 80 | FALSE, /* partial_inplace */ |
| 81 | 0x00000000, /* src_mask */ |
| 82 | 0x0000ffff, /* dst_mask */ |
| 83 | FALSE), /* pcrel_offset */ |
| 84 | |
| 85 | /* A 32 bit absolute relocation. */ |
| 86 | HOWTO (R_CRIS_32, /* type */ |
| 87 | 0, /* rightshift */ |
| 88 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 89 | 32, /* bitsize */ |
| 90 | FALSE, /* pc_relative */ |
| 91 | 0, /* bitpos */ |
| 92 | /* We don't want overflow complaints for 64-bit vma builds |
| 93 | for e.g. sym+0x40000000 (or actually sym-0xc0000000 in |
| 94 | 32-bit ELF) where sym=0xc0001234. |
| 95 | Don't do this for the PIC relocs, as we don't expect to |
| 96 | see them with large offsets. */ |
| 97 | complain_overflow_dont, /* complain_on_overflow */ |
| 98 | bfd_elf_generic_reloc, /* special_function */ |
| 99 | "R_CRIS_32", /* name */ |
| 100 | FALSE, /* partial_inplace */ |
| 101 | 0x00000000, /* src_mask */ |
| 102 | 0xffffffff, /* dst_mask */ |
| 103 | FALSE), /* pcrel_offset */ |
| 104 | |
| 105 | /* An 8 bit PC-relative relocation. */ |
| 106 | HOWTO (R_CRIS_8_PCREL, /* type */ |
| 107 | 0, /* rightshift */ |
| 108 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 109 | 8, /* bitsize */ |
| 110 | TRUE, /* pc_relative */ |
| 111 | 0, /* bitpos */ |
| 112 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 113 | cris_elf_pcrel_reloc, /* special_function */ |
| 114 | "R_CRIS_8_PCREL", /* name */ |
| 115 | FALSE, /* partial_inplace */ |
| 116 | 0x0000, /* src_mask */ |
| 117 | 0x00ff, /* dst_mask */ |
| 118 | TRUE), /* pcrel_offset */ |
| 119 | |
| 120 | /* A 16 bit PC-relative relocation. */ |
| 121 | HOWTO (R_CRIS_16_PCREL, /* type */ |
| 122 | 0, /* rightshift */ |
| 123 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 124 | 16, /* bitsize */ |
| 125 | TRUE, /* pc_relative */ |
| 126 | 0, /* bitpos */ |
| 127 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 128 | cris_elf_pcrel_reloc, /* special_function */ |
| 129 | "R_CRIS_16_PCREL", /* name */ |
| 130 | FALSE, /* partial_inplace */ |
| 131 | 0x00000000, /* src_mask */ |
| 132 | 0x0000ffff, /* dst_mask */ |
| 133 | TRUE), /* pcrel_offset */ |
| 134 | |
| 135 | /* A 32 bit PC-relative relocation. */ |
| 136 | HOWTO (R_CRIS_32_PCREL, /* type */ |
| 137 | 0, /* rightshift */ |
| 138 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 139 | 32, /* bitsize */ |
| 140 | TRUE, /* pc_relative */ |
| 141 | 0, /* bitpos */ |
| 142 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 143 | cris_elf_pcrel_reloc, /* special_function */ |
| 144 | "R_CRIS_32_PCREL", /* name */ |
| 145 | FALSE, /* partial_inplace */ |
| 146 | 0x00000000, /* src_mask */ |
| 147 | 0xffffffff, /* dst_mask */ |
| 148 | TRUE), /* pcrel_offset */ |
| 149 | |
| 150 | /* GNU extension to record C++ vtable hierarchy. */ |
| 151 | HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ |
| 152 | 0, /* rightshift */ |
| 153 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 154 | 0, /* bitsize */ |
| 155 | FALSE, /* pc_relative */ |
| 156 | 0, /* bitpos */ |
| 157 | complain_overflow_dont, /* complain_on_overflow */ |
| 158 | NULL, /* special_function */ |
| 159 | "R_CRIS_GNU_VTINHERIT", /* name */ |
| 160 | FALSE, /* partial_inplace */ |
| 161 | 0, /* src_mask */ |
| 162 | 0, /* dst_mask */ |
| 163 | FALSE), /* pcrel_offset */ |
| 164 | |
| 165 | /* GNU extension to record C++ vtable member usage. */ |
| 166 | HOWTO (R_CRIS_GNU_VTENTRY, /* type */ |
| 167 | 0, /* rightshift */ |
| 168 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 169 | 0, /* bitsize */ |
| 170 | FALSE, /* pc_relative */ |
| 171 | 0, /* bitpos */ |
| 172 | complain_overflow_dont, /* complain_on_overflow */ |
| 173 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 174 | "R_CRIS_GNU_VTENTRY", /* name */ |
| 175 | FALSE, /* partial_inplace */ |
| 176 | 0, /* src_mask */ |
| 177 | 0, /* dst_mask */ |
| 178 | FALSE), /* pcrel_offset */ |
| 179 | |
| 180 | /* This is used only by the dynamic linker. The symbol should exist |
| 181 | both in the object being run and in some shared library. The |
| 182 | dynamic linker copies the data addressed by the symbol from the |
| 183 | shared library into the object, because the object being |
| 184 | run has to have the data at some particular address. */ |
| 185 | HOWTO (R_CRIS_COPY, /* type */ |
| 186 | 0, /* rightshift */ |
| 187 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 188 | 32, /* bitsize */ |
| 189 | FALSE, /* pc_relative */ |
| 190 | 0, /* bitpos */ |
| 191 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 192 | bfd_elf_generic_reloc, /* special_function */ |
| 193 | "R_CRIS_COPY", /* name */ |
| 194 | FALSE, /* partial_inplace */ |
| 195 | 0, /* src_mask */ |
| 196 | 0, /* dst_mask */ |
| 197 | FALSE), /* pcrel_offset */ |
| 198 | |
| 199 | /* Like R_CRIS_32, but used when setting global offset table entries. */ |
| 200 | HOWTO (R_CRIS_GLOB_DAT, /* type */ |
| 201 | 0, /* rightshift */ |
| 202 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 203 | 32, /* bitsize */ |
| 204 | FALSE, /* pc_relative */ |
| 205 | 0, /* bitpos */ |
| 206 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 207 | bfd_elf_generic_reloc, /* special_function */ |
| 208 | "R_CRIS_GLOB_DAT", /* name */ |
| 209 | FALSE, /* partial_inplace */ |
| 210 | 0, /* src_mask */ |
| 211 | 0xffffffff, /* dst_mask */ |
| 212 | FALSE), /* pcrel_offset */ |
| 213 | |
| 214 | /* Marks a procedure linkage table entry for a symbol. */ |
| 215 | HOWTO (R_CRIS_JUMP_SLOT, /* type */ |
| 216 | 0, /* rightshift */ |
| 217 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 218 | 32, /* bitsize */ |
| 219 | FALSE, /* pc_relative */ |
| 220 | 0, /* bitpos */ |
| 221 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 222 | bfd_elf_generic_reloc, /* special_function */ |
| 223 | "R_CRIS_JUMP_SLOT", /* name */ |
| 224 | FALSE, /* partial_inplace */ |
| 225 | 0, /* src_mask */ |
| 226 | 0, /* dst_mask */ |
| 227 | FALSE), /* pcrel_offset */ |
| 228 | |
| 229 | /* Used only by the dynamic linker. When the object is run, this |
| 230 | longword is set to the load address of the object, plus the |
| 231 | addend. */ |
| 232 | HOWTO (R_CRIS_RELATIVE, /* type */ |
| 233 | 0, /* rightshift */ |
| 234 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 235 | 32, /* bitsize */ |
| 236 | FALSE, /* pc_relative */ |
| 237 | 0, /* bitpos */ |
| 238 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 239 | bfd_elf_generic_reloc, /* special_function */ |
| 240 | "R_CRIS_RELATIVE", /* name */ |
| 241 | FALSE, /* partial_inplace */ |
| 242 | 0, /* src_mask */ |
| 243 | 0xffffffff, /* dst_mask */ |
| 244 | FALSE), /* pcrel_offset */ |
| 245 | |
| 246 | /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */ |
| 247 | HOWTO (R_CRIS_16_GOT, /* type */ |
| 248 | 0, /* rightshift */ |
| 249 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 250 | 16, /* bitsize */ |
| 251 | FALSE, /* pc_relative */ |
| 252 | 0, /* bitpos */ |
| 253 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 254 | bfd_elf_generic_reloc, /* special_function */ |
| 255 | "R_CRIS_16_GOT", /* name */ |
| 256 | FALSE, /* partial_inplace */ |
| 257 | 0, /* src_mask */ |
| 258 | 0xffff, /* dst_mask */ |
| 259 | FALSE), /* pcrel_offset */ |
| 260 | |
| 261 | HOWTO (R_CRIS_32_GOT, /* type */ |
| 262 | 0, /* rightshift */ |
| 263 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 264 | 32, /* bitsize */ |
| 265 | FALSE, /* pc_relative */ |
| 266 | 0, /* bitpos */ |
| 267 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 268 | bfd_elf_generic_reloc, /* special_function */ |
| 269 | "R_CRIS_32_GOT", /* name */ |
| 270 | FALSE, /* partial_inplace */ |
| 271 | 0, /* src_mask */ |
| 272 | 0xffffffff, /* dst_mask */ |
| 273 | FALSE), /* pcrel_offset */ |
| 274 | |
| 275 | /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of |
| 276 | the GOT table for the symbol. */ |
| 277 | HOWTO (R_CRIS_16_GOTPLT, /* type */ |
| 278 | 0, /* rightshift */ |
| 279 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 280 | 16, /* bitsize */ |
| 281 | FALSE, /* pc_relative */ |
| 282 | 0, /* bitpos */ |
| 283 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 284 | bfd_elf_generic_reloc, /* special_function */ |
| 285 | "R_CRIS_16_GOTPLT", /* name */ |
| 286 | FALSE, /* partial_inplace */ |
| 287 | 0, /* src_mask */ |
| 288 | 0xffff, /* dst_mask */ |
| 289 | FALSE), /* pcrel_offset */ |
| 290 | |
| 291 | HOWTO (R_CRIS_32_GOTPLT, /* type */ |
| 292 | 0, /* rightshift */ |
| 293 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 294 | 32, /* bitsize */ |
| 295 | FALSE, /* pc_relative */ |
| 296 | 0, /* bitpos */ |
| 297 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 298 | bfd_elf_generic_reloc, /* special_function */ |
| 299 | "R_CRIS_32_GOTPLT", /* name */ |
| 300 | FALSE, /* partial_inplace */ |
| 301 | 0, /* src_mask */ |
| 302 | 0xffffffff, /* dst_mask */ |
| 303 | FALSE), /* pcrel_offset */ |
| 304 | |
| 305 | /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should |
| 306 | be necessary. */ |
| 307 | HOWTO (R_CRIS_32_GOTREL, /* type */ |
| 308 | 0, /* rightshift */ |
| 309 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 310 | 32, /* bitsize */ |
| 311 | FALSE, /* pc_relative */ |
| 312 | 0, /* bitpos */ |
| 313 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 314 | bfd_elf_generic_reloc, /* special_function */ |
| 315 | "R_CRIS_32_GOTREL", /* name */ |
| 316 | FALSE, /* partial_inplace */ |
| 317 | 0, /* src_mask */ |
| 318 | 0xffffffff, /* dst_mask */ |
| 319 | FALSE), /* pcrel_offset */ |
| 320 | |
| 321 | /* A 32-bit offset from GOT to entry for this symbol in PLT and request |
| 322 | to create PLT entry for symbol. */ |
| 323 | HOWTO (R_CRIS_32_PLT_GOTREL, /* type */ |
| 324 | 0, /* rightshift */ |
| 325 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 326 | 32, /* bitsize */ |
| 327 | FALSE, /* pc_relative */ |
| 328 | 0, /* bitpos */ |
| 329 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 330 | bfd_elf_generic_reloc, /* special_function */ |
| 331 | "R_CRIS_32_PLT_GOTREL", /* name */ |
| 332 | FALSE, /* partial_inplace */ |
| 333 | 0, /* src_mask */ |
| 334 | 0xffffffff, /* dst_mask */ |
| 335 | FALSE), /* pcrel_offset */ |
| 336 | |
| 337 | /* A 32-bit offset from PC (location after the relocation) + addend to |
| 338 | entry for this symbol in PLT and request to create PLT entry for |
| 339 | symbol. */ |
| 340 | HOWTO (R_CRIS_32_PLT_PCREL, /* type */ |
| 341 | 0, /* rightshift */ |
| 342 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 343 | 32, /* bitsize */ |
| 344 | TRUE, /* pc_relative */ |
| 345 | 0, /* bitpos */ |
| 346 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 347 | cris_elf_pcrel_reloc, /* special_function */ |
| 348 | "R_CRIS_32_PLT_PCREL", /* name */ |
| 349 | FALSE, /* partial_inplace */ |
| 350 | 0, /* src_mask */ |
| 351 | 0xffffffff, /* dst_mask */ |
| 352 | TRUE), /* pcrel_offset */ |
| 353 | |
| 354 | /* We don't handle these in any special manner and cross-format |
| 355 | linking is not supported; just recognize them enough to pass them |
| 356 | around. FIXME: do the same for most PIC relocs and add sanity |
| 357 | tests to actually refuse gracefully to handle these and PIC |
| 358 | relocs for cross-format linking. */ |
| 359 | #define TLSHOWTO32(name) \ |
| 360 | HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \ |
| 361 | bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE) |
| 362 | #define TLSHOWTO16X(name, X) \ |
| 363 | HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \ |
| 364 | bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE) |
| 365 | #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned) |
| 366 | #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed) |
| 367 | |
| 368 | TLSHOWTO32 (R_CRIS_32_GOT_GD), |
| 369 | TLSHOWTO16 (R_CRIS_16_GOT_GD), |
| 370 | TLSHOWTO32 (R_CRIS_32_GD), |
| 371 | TLSHOWTO32 (R_CRIS_DTP), |
| 372 | TLSHOWTO32 (R_CRIS_32_DTPREL), |
| 373 | TLSHOWTO16S (R_CRIS_16_DTPREL), |
| 374 | TLSHOWTO32 (R_CRIS_32_GOT_TPREL), |
| 375 | TLSHOWTO16S (R_CRIS_16_GOT_TPREL), |
| 376 | TLSHOWTO32 (R_CRIS_32_TPREL), |
| 377 | TLSHOWTO16S (R_CRIS_16_TPREL), |
| 378 | TLSHOWTO32 (R_CRIS_DTPMOD), |
| 379 | TLSHOWTO32 (R_CRIS_32_IE) |
| 380 | }; |
| 381 | \f |
| 382 | /* Map BFD reloc types to CRIS ELF reloc types. */ |
| 383 | |
| 384 | struct cris_reloc_map |
| 385 | { |
| 386 | bfd_reloc_code_real_type bfd_reloc_val; |
| 387 | unsigned int cris_reloc_val; |
| 388 | }; |
| 389 | |
| 390 | static const struct cris_reloc_map cris_reloc_map [] = |
| 391 | { |
| 392 | { BFD_RELOC_NONE, R_CRIS_NONE }, |
| 393 | { BFD_RELOC_8, R_CRIS_8 }, |
| 394 | { BFD_RELOC_16, R_CRIS_16 }, |
| 395 | { BFD_RELOC_32, R_CRIS_32 }, |
| 396 | { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL }, |
| 397 | { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL }, |
| 398 | { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL }, |
| 399 | { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT }, |
| 400 | { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY }, |
| 401 | { BFD_RELOC_CRIS_COPY, R_CRIS_COPY }, |
| 402 | { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT }, |
| 403 | { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT }, |
| 404 | { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE }, |
| 405 | { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT }, |
| 406 | { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT }, |
| 407 | { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT }, |
| 408 | { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT }, |
| 409 | { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL }, |
| 410 | { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL }, |
| 411 | { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }, |
| 412 | { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD }, |
| 413 | { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD }, |
| 414 | { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD }, |
| 415 | { BFD_RELOC_CRIS_DTP, R_CRIS_DTP }, |
| 416 | { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL }, |
| 417 | { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL }, |
| 418 | { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL }, |
| 419 | { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL }, |
| 420 | { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL }, |
| 421 | { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL }, |
| 422 | { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD }, |
| 423 | { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE } |
| 424 | }; |
| 425 | |
| 426 | static reloc_howto_type * |
| 427 | cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 428 | bfd_reloc_code_real_type code) |
| 429 | { |
| 430 | unsigned int i; |
| 431 | |
| 432 | for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++) |
| 433 | if (cris_reloc_map [i].bfd_reloc_val == code) |
| 434 | return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val]; |
| 435 | |
| 436 | return NULL; |
| 437 | } |
| 438 | |
| 439 | static reloc_howto_type * |
| 440 | cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| 441 | { |
| 442 | unsigned int i; |
| 443 | |
| 444 | for (i = 0; |
| 445 | i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]); |
| 446 | i++) |
| 447 | if (cris_elf_howto_table[i].name != NULL |
| 448 | && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0) |
| 449 | return &cris_elf_howto_table[i]; |
| 450 | |
| 451 | return NULL; |
| 452 | } |
| 453 | |
| 454 | /* Set the howto pointer for an CRIS ELF reloc. */ |
| 455 | |
| 456 | static void |
| 457 | cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, |
| 458 | arelent * cache_ptr, |
| 459 | Elf_Internal_Rela * dst) |
| 460 | { |
| 461 | enum elf_cris_reloc_type r_type; |
| 462 | |
| 463 | r_type = ELF32_R_TYPE (dst->r_info); |
| 464 | if (r_type >= R_CRIS_max) |
| 465 | { |
| 466 | /* xgettext:c-format */ |
| 467 | _bfd_error_handler (_("%B: invalid CRIS reloc number: %d"), abfd, r_type); |
| 468 | r_type = 0; |
| 469 | } |
| 470 | cache_ptr->howto = & cris_elf_howto_table [r_type]; |
| 471 | } |
| 472 | |
| 473 | bfd_reloc_status_type |
| 474 | cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 475 | arelent *reloc_entry, |
| 476 | asymbol *symbol, |
| 477 | void * data ATTRIBUTE_UNUSED, |
| 478 | asection *input_section, |
| 479 | bfd *output_bfd, |
| 480 | char **error_message ATTRIBUTE_UNUSED) |
| 481 | { |
| 482 | /* By default (using only bfd_elf_generic_reloc when linking to |
| 483 | non-ELF formats) PC-relative relocs are relative to the beginning |
| 484 | of the reloc. CRIS PC-relative relocs are relative to the position |
| 485 | *after* the reloc because that's what pre-CRISv32 PC points to |
| 486 | after reading an insn field with that reloc. (For CRISv32, PC is |
| 487 | actually relative to the start of the insn, but we keep the old |
| 488 | definition.) Still, we use as much generic machinery as we can. |
| 489 | |
| 490 | Only adjust when doing a final link. */ |
| 491 | if (output_bfd == (bfd *) NULL) |
| 492 | reloc_entry->addend -= 1 << reloc_entry->howto->size; |
| 493 | |
| 494 | return |
| 495 | bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 496 | input_section, output_bfd, error_message); |
| 497 | } |
| 498 | \f |
| 499 | /* Support for core dump NOTE sections. |
| 500 | The slightly unintuitive code layout is an attempt to keep at least |
| 501 | some similarities with other ports, hoping to simplify general |
| 502 | changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */ |
| 503 | |
| 504 | static bfd_boolean |
| 505 | cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 506 | { |
| 507 | int offset; |
| 508 | size_t size; |
| 509 | |
| 510 | if (bfd_get_mach (abfd) == bfd_mach_cris_v32) |
| 511 | switch (note->descsz) |
| 512 | { |
| 513 | default: |
| 514 | return FALSE; |
| 515 | |
| 516 | case 202: /* Linux/CRISv32 */ |
| 517 | /* pr_cursig */ |
| 518 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 519 | |
| 520 | /* pr_pid */ |
| 521 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22); |
| 522 | |
| 523 | /* pr_reg */ |
| 524 | offset = 70; |
| 525 | size = 128; |
| 526 | |
| 527 | break; |
| 528 | } |
| 529 | else |
| 530 | switch (note->descsz) |
| 531 | { |
| 532 | default: |
| 533 | return FALSE; |
| 534 | |
| 535 | case 214: /* Linux/CRIS */ |
| 536 | /* pr_cursig */ |
| 537 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 538 | |
| 539 | /* pr_pid */ |
| 540 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22); |
| 541 | |
| 542 | /* pr_reg */ |
| 543 | offset = 70; |
| 544 | size = 140; |
| 545 | |
| 546 | break; |
| 547 | } |
| 548 | |
| 549 | /* Make a ".reg/999" section. */ |
| 550 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 551 | size, note->descpos + offset); |
| 552 | } |
| 553 | |
| 554 | static bfd_boolean |
| 555 | cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 556 | { |
| 557 | if (bfd_get_mach (abfd) == bfd_mach_cris_v32) |
| 558 | switch (note->descsz) |
| 559 | { |
| 560 | default: |
| 561 | return FALSE; |
| 562 | |
| 563 | case 124: /* Linux/CRISv32 elf_prpsinfo */ |
| 564 | elf_tdata (abfd)->core->program |
| 565 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 566 | elf_tdata (abfd)->core->command |
| 567 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 568 | } |
| 569 | else |
| 570 | switch (note->descsz) |
| 571 | { |
| 572 | default: |
| 573 | return FALSE; |
| 574 | |
| 575 | case 124: /* Linux/CRIS elf_prpsinfo */ |
| 576 | elf_tdata (abfd)->core->program |
| 577 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 578 | elf_tdata (abfd)->core->command |
| 579 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 580 | } |
| 581 | |
| 582 | /* Note that for some reason, a spurious space is tacked |
| 583 | onto the end of the args in some (at least one anyway) |
| 584 | implementations, so strip it off if it exists. */ |
| 585 | |
| 586 | { |
| 587 | char *command = elf_tdata (abfd)->core->command; |
| 588 | int n = strlen (command); |
| 589 | |
| 590 | if (0 < n && command[n - 1] == ' ') |
| 591 | command[n - 1] = '\0'; |
| 592 | } |
| 593 | |
| 594 | return TRUE; |
| 595 | } |
| 596 | \f |
| 597 | /* The name of the dynamic interpreter. This is put in the .interp |
| 598 | section. */ |
| 599 | |
| 600 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 601 | |
| 602 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 603 | |
| 604 | #define PLT_ENTRY_SIZE 20 |
| 605 | #define PLT_ENTRY_SIZE_V32 26 |
| 606 | |
| 607 | /* The first entry in an absolute procedure linkage table looks like this. */ |
| 608 | |
| 609 | static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] = |
| 610 | { |
| 611 | 0xfc, 0xe1, |
| 612 | 0x7e, 0x7e, /* push mof. */ |
| 613 | 0x7f, 0x0d, /* (dip [pc+]) */ |
| 614 | 0, 0, 0, 0, /* Replaced with address of .got + 4. */ |
| 615 | 0x30, 0x7a, /* move [...],mof */ |
| 616 | 0x7f, 0x0d, /* (dip [pc+]) */ |
| 617 | 0, 0, 0, 0, /* Replaced with address of .got + 8. */ |
| 618 | 0x30, 0x09 /* jump [...] */ |
| 619 | }; |
| 620 | |
| 621 | static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = |
| 622 | { |
| 623 | 0x84, 0xe2, /* subq 4,$sp */ |
| 624 | 0x6f, 0xfe, /* move.d 0,$acr */ |
| 625 | 0, 0, 0, 0, /* Replaced by address of .got + 4. */ |
| 626 | 0x7e, 0x7a, /* move $mof,[$sp] */ |
| 627 | 0x3f, 0x7a, /* move [$acr],$mof */ |
| 628 | 0x04, 0xf2, /* addq 4,acr */ |
| 629 | 0x6f, 0xfa, /* move.d [$acr],$acr */ |
| 630 | 0xbf, 0x09, /* jump $acr */ |
| 631 | 0xb0, 0x05, /* nop */ |
| 632 | 0, 0 /* Pad out to 26 bytes. */ |
| 633 | }; |
| 634 | |
| 635 | /* Subsequent entries in an absolute procedure linkage table look like |
| 636 | this. */ |
| 637 | |
| 638 | static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] = |
| 639 | { |
| 640 | 0x7f, 0x0d, /* (dip [pc+]) */ |
| 641 | 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ |
| 642 | 0x30, 0x09, /* jump [...] */ |
| 643 | 0x3f, 0x7e, /* move [pc+],mof */ |
| 644 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ |
| 645 | 0x2f, 0xfe, /* add.d [pc+],pc */ |
| 646 | 0xec, 0xff, |
| 647 | 0xff, 0xff /* Replaced with offset to start of .plt. */ |
| 648 | }; |
| 649 | |
| 650 | static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] = |
| 651 | { |
| 652 | 0x6f, 0xfe, /* move.d 0,$acr */ |
| 653 | 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ |
| 654 | 0x6f, 0xfa, /* move.d [$acr],$acr */ |
| 655 | 0xbf, 0x09, /* jump $acr */ |
| 656 | 0xb0, 0x05, /* nop */ |
| 657 | 0x3f, 0x7e, /* move 0,mof */ |
| 658 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ |
| 659 | 0xbf, 0x0e, /* ba start_of_plt0_entry */ |
| 660 | 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */ |
| 661 | 0xb0, 0x05 /* nop */ |
| 662 | }; |
| 663 | |
| 664 | /* The first entry in a PIC procedure linkage table looks like this. */ |
| 665 | |
| 666 | static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] = |
| 667 | { |
| 668 | 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */ |
| 669 | 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */ |
| 670 | 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */ |
| 671 | 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */ |
| 672 | }; |
| 673 | |
| 674 | static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = |
| 675 | { |
| 676 | 0x84, 0xe2, /* subq 4,$sp */ |
| 677 | 0x04, 0x01, /* addoq 4,$r0,$acr */ |
| 678 | 0x7e, 0x7a, /* move $mof,[$sp] */ |
| 679 | 0x3f, 0x7a, /* move [$acr],$mof */ |
| 680 | 0x04, 0xf2, /* addq 4,$acr */ |
| 681 | 0x6f, 0xfa, /* move.d [$acr],$acr */ |
| 682 | 0xbf, 0x09, /* jump $acr */ |
| 683 | 0xb0, 0x05, /* nop */ |
| 684 | 0, 0, /* Pad out to 26 bytes. */ |
| 685 | 0, 0, 0, 0, |
| 686 | 0, 0, 0, 0 |
| 687 | }; |
| 688 | |
| 689 | /* Subsequent entries in a PIC procedure linkage table look like this. */ |
| 690 | |
| 691 | static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] = |
| 692 | { |
| 693 | 0x6f, 0x0d, /* (bdap [pc+].d,r0) */ |
| 694 | 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ |
| 695 | 0x30, 0x09, /* jump [...] */ |
| 696 | 0x3f, 0x7e, /* move [pc+],mof */ |
| 697 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ |
| 698 | 0x2f, 0xfe, /* add.d [pc+],pc */ |
| 699 | 0xec, 0xff, /* Replaced with offset to start of .plt. */ |
| 700 | 0xff, 0xff |
| 701 | }; |
| 702 | |
| 703 | static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] = |
| 704 | { |
| 705 | 0x6f, 0x0d, /* addo.d 0,$r0,$acr */ |
| 706 | 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ |
| 707 | 0x6f, 0xfa, /* move.d [$acr],$acr */ |
| 708 | 0xbf, 0x09, /* jump $acr */ |
| 709 | 0xb0, 0x05, /* nop */ |
| 710 | 0x3f, 0x7e, /* move relocoffs,$mof */ |
| 711 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ |
| 712 | 0xbf, 0x0e, /* ba start_of_plt */ |
| 713 | 0, 0, 0, 0, /* Replaced with offset to start of .plt. */ |
| 714 | 0xb0, 0x05 /* nop */ |
| 715 | }; |
| 716 | \f |
| 717 | /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits |
| 718 | (and most other PIC/shlib stuff). Check that we don't drift away |
| 719 | without reason. |
| 720 | |
| 721 | The CRIS linker, like the m68k and i386 linkers (and probably the rest |
| 722 | too) needs to keep track of the number of relocs that it decides to |
| 723 | copy in check_relocs for each symbol. This is so that it can discard |
| 724 | PC relative relocs if it doesn't need them when linking with |
| 725 | -Bsymbolic. We store the information in a field extending the regular |
| 726 | ELF linker hash table. */ |
| 727 | |
| 728 | /* This structure keeps track of the number of PC relative relocs we have |
| 729 | copied for a given symbol. */ |
| 730 | |
| 731 | struct elf_cris_pcrel_relocs_copied |
| 732 | { |
| 733 | /* Next section. */ |
| 734 | struct elf_cris_pcrel_relocs_copied *next; |
| 735 | |
| 736 | /* A section in dynobj. */ |
| 737 | asection *section; |
| 738 | |
| 739 | /* Number of relocs copied in this section. */ |
| 740 | bfd_size_type count; |
| 741 | |
| 742 | /* Example of reloc being copied, for message. */ |
| 743 | enum elf_cris_reloc_type r_type; |
| 744 | }; |
| 745 | |
| 746 | /* CRIS ELF linker hash entry. */ |
| 747 | |
| 748 | struct elf_cris_link_hash_entry |
| 749 | { |
| 750 | struct elf_link_hash_entry root; |
| 751 | |
| 752 | /* Number of PC relative relocs copied for this symbol. */ |
| 753 | struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied; |
| 754 | |
| 755 | /* The GOTPLT references are CRIS-specific; the goal is to avoid having |
| 756 | both a general GOT and a PLT-specific GOT entry for the same symbol, |
| 757 | when it is referenced both as a function and as a function pointer. |
| 758 | |
| 759 | Number of GOTPLT references for a function. */ |
| 760 | bfd_signed_vma gotplt_refcount; |
| 761 | |
| 762 | /* Actual GOTPLT index for this symbol, if applicable, or zero if not |
| 763 | (zero is never used as an index). FIXME: We should be able to fold |
| 764 | this with gotplt_refcount in a union, like the got and plt unions in |
| 765 | elf_link_hash_entry. */ |
| 766 | bfd_size_type gotplt_offset; |
| 767 | |
| 768 | /* The root.got.refcount is the sum of the regular reference counts |
| 769 | (this) and those members below. We have to keep a separate count |
| 770 | to track when we've found the first (or last) reference to a |
| 771 | regular got entry. The offset is in root.got.offset. */ |
| 772 | bfd_signed_vma reg_got_refcount; |
| 773 | |
| 774 | /* Similar to the above, the number of reloc references to this |
| 775 | symbols that need a R_CRIS_32_TPREL slot. The offset is in |
| 776 | root.got.offset, because this and .dtp_refcount can't validly |
| 777 | happen when there's also a regular GOT entry; that's invalid |
| 778 | input for which an error is emitted. */ |
| 779 | bfd_signed_vma tprel_refcount; |
| 780 | |
| 781 | /* Similar to the above, the number of reloc references to this |
| 782 | symbols that need a R_CRIS_DTP slot. The offset is in |
| 783 | root.got.offset; plus 4 if .tprel_refcount > 0. */ |
| 784 | bfd_signed_vma dtp_refcount; |
| 785 | }; |
| 786 | |
| 787 | static bfd_boolean |
| 788 | elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *, |
| 789 | void * ); |
| 790 | static bfd_boolean |
| 791 | elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *, |
| 792 | void *); |
| 793 | |
| 794 | /* The local_got_refcounts and local_got_offsets are a multiple of |
| 795 | LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the |
| 796 | refcount for GOT itself, see code), with the summary / group offset |
| 797 | for local symbols located at offset N, reference counts for |
| 798 | ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP |
| 799 | relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N + |
| 800 | 3*LSNUM. */ |
| 801 | |
| 802 | #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info) |
| 803 | #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info) |
| 804 | #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info) |
| 805 | #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4) |
| 806 | |
| 807 | /* CRIS ELF linker hash table. */ |
| 808 | |
| 809 | struct elf_cris_link_hash_table |
| 810 | { |
| 811 | struct elf_link_hash_table root; |
| 812 | |
| 813 | /* We can't use the PLT offset and calculate to get the GOTPLT offset, |
| 814 | since we try and avoid creating GOTPLT:s when there's already a GOT. |
| 815 | Instead, we keep and update the next available index here. */ |
| 816 | bfd_size_type next_gotplt_entry; |
| 817 | |
| 818 | /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have |
| 819 | been seen for any input; if != 0, then the constant-offset |
| 820 | R_CRIS_DTPMOD is needed for this DSO/executable. This turns |
| 821 | negative at relocation, so that we don't need an extra flag for |
| 822 | when the reloc is output. */ |
| 823 | bfd_signed_vma dtpmod_refcount; |
| 824 | }; |
| 825 | |
| 826 | /* Traverse a CRIS ELF linker hash table. */ |
| 827 | |
| 828 | #define elf_cris_link_hash_traverse(table, func, info) \ |
| 829 | (elf_link_hash_traverse \ |
| 830 | (&(table)->root, \ |
| 831 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 832 | (info))) |
| 833 | |
| 834 | /* Get the CRIS ELF linker hash table from a link_info structure. */ |
| 835 | |
| 836 | #define elf_cris_hash_table(p) \ |
| 837 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 838 | == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL) |
| 839 | |
| 840 | /* Get the CRIS ELF linker hash entry from a regular hash entry (the |
| 841 | "parent class"). The .root reference is just a simple type |
| 842 | check on the argument. */ |
| 843 | |
| 844 | #define elf_cris_hash_entry(p) \ |
| 845 | ((struct elf_cris_link_hash_entry *) (&(p)->root)) |
| 846 | |
| 847 | /* Create an entry in a CRIS ELF linker hash table. */ |
| 848 | |
| 849 | static struct bfd_hash_entry * |
| 850 | elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 851 | struct bfd_hash_table *table, |
| 852 | const char *string) |
| 853 | { |
| 854 | struct elf_cris_link_hash_entry *ret = |
| 855 | (struct elf_cris_link_hash_entry *) entry; |
| 856 | |
| 857 | /* Allocate the structure if it has not already been allocated by a |
| 858 | subclass. */ |
| 859 | if (ret == (struct elf_cris_link_hash_entry *) NULL) |
| 860 | ret = ((struct elf_cris_link_hash_entry *) |
| 861 | bfd_hash_allocate (table, |
| 862 | sizeof (struct elf_cris_link_hash_entry))); |
| 863 | if (ret == (struct elf_cris_link_hash_entry *) NULL) |
| 864 | return (struct bfd_hash_entry *) ret; |
| 865 | |
| 866 | /* Call the allocation method of the superclass. */ |
| 867 | ret = ((struct elf_cris_link_hash_entry *) |
| 868 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 869 | table, string)); |
| 870 | if (ret != (struct elf_cris_link_hash_entry *) NULL) |
| 871 | { |
| 872 | ret->pcrel_relocs_copied = NULL; |
| 873 | ret->gotplt_refcount = 0; |
| 874 | ret->gotplt_offset = 0; |
| 875 | ret->dtp_refcount = 0; |
| 876 | ret->tprel_refcount = 0; |
| 877 | ret->reg_got_refcount = 0; |
| 878 | } |
| 879 | |
| 880 | return (struct bfd_hash_entry *) ret; |
| 881 | } |
| 882 | |
| 883 | /* Create a CRIS ELF linker hash table. */ |
| 884 | |
| 885 | static struct bfd_link_hash_table * |
| 886 | elf_cris_link_hash_table_create (bfd *abfd) |
| 887 | { |
| 888 | struct elf_cris_link_hash_table *ret; |
| 889 | bfd_size_type amt = sizeof (struct elf_cris_link_hash_table); |
| 890 | |
| 891 | ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt)); |
| 892 | if (ret == (struct elf_cris_link_hash_table *) NULL) |
| 893 | return NULL; |
| 894 | |
| 895 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 896 | elf_cris_link_hash_newfunc, |
| 897 | sizeof (struct elf_cris_link_hash_entry), |
| 898 | CRIS_ELF_DATA)) |
| 899 | { |
| 900 | free (ret); |
| 901 | return NULL; |
| 902 | } |
| 903 | |
| 904 | /* Initialize to skip over the first three entries in the gotplt; they |
| 905 | are used for run-time symbol evaluation. */ |
| 906 | ret->next_gotplt_entry = 12; |
| 907 | |
| 908 | return &ret->root.root; |
| 909 | } |
| 910 | \f |
| 911 | /* Perform a single relocation. By default we use the standard BFD |
| 912 | routines, with a few tweaks. */ |
| 913 | |
| 914 | static bfd_reloc_status_type |
| 915 | cris_final_link_relocate (reloc_howto_type * howto, |
| 916 | bfd * input_bfd, |
| 917 | asection * input_section, |
| 918 | bfd_byte * contents, |
| 919 | Elf_Internal_Rela * rel, |
| 920 | bfd_vma relocation) |
| 921 | { |
| 922 | bfd_reloc_status_type r; |
| 923 | enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); |
| 924 | |
| 925 | /* PC-relative relocations are relative to the position *after* |
| 926 | the reloc. Note that for R_CRIS_8_PCREL the adjustment is |
| 927 | not a single byte, since PC must be 16-bit-aligned. */ |
| 928 | switch (r_type) |
| 929 | { |
| 930 | /* Check that the 16-bit GOT relocs are positive. */ |
| 931 | case R_CRIS_16_GOTPLT: |
| 932 | case R_CRIS_16_GOT: |
| 933 | if ((bfd_signed_vma) relocation < 0) |
| 934 | return bfd_reloc_overflow; |
| 935 | break; |
| 936 | |
| 937 | case R_CRIS_32_PLT_PCREL: |
| 938 | case R_CRIS_32_PCREL: |
| 939 | relocation -= 2; |
| 940 | /* Fall through. */ |
| 941 | case R_CRIS_8_PCREL: |
| 942 | case R_CRIS_16_PCREL: |
| 943 | relocation -= 2; |
| 944 | break; |
| 945 | |
| 946 | default: |
| 947 | break; |
| 948 | } |
| 949 | |
| 950 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 951 | contents, rel->r_offset, |
| 952 | relocation, rel->r_addend); |
| 953 | return r; |
| 954 | } |
| 955 | \f |
| 956 | |
| 957 | /* The number of errors left before we stop outputting reloc-specific |
| 958 | explanatory messages. By coincidence, this works nicely together |
| 959 | with the default number of messages you'll get from LD about |
| 960 | "relocation truncated to fit" messages before you get an |
| 961 | "additional relocation overflows omitted from the output". */ |
| 962 | static int additional_relocation_error_msg_count = 10; |
| 963 | |
| 964 | /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was |
| 965 | copied, for further comments. */ |
| 966 | |
| 967 | static bfd_boolean |
| 968 | cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 969 | struct bfd_link_info *info, |
| 970 | bfd *input_bfd, |
| 971 | asection *input_section, |
| 972 | bfd_byte *contents, |
| 973 | Elf_Internal_Rela *relocs, |
| 974 | Elf_Internal_Sym *local_syms, |
| 975 | asection **local_sections) |
| 976 | { |
| 977 | struct elf_cris_link_hash_table * htab; |
| 978 | bfd *dynobj; |
| 979 | Elf_Internal_Shdr *symtab_hdr; |
| 980 | struct elf_link_hash_entry **sym_hashes; |
| 981 | bfd_vma *local_got_offsets; |
| 982 | asection *sgot; |
| 983 | asection *splt; |
| 984 | asection *sreloc; |
| 985 | Elf_Internal_Rela *rel; |
| 986 | Elf_Internal_Rela *relend; |
| 987 | asection *srelgot; |
| 988 | |
| 989 | htab = elf_cris_hash_table (info); |
| 990 | if (htab == NULL) |
| 991 | return FALSE; |
| 992 | |
| 993 | dynobj = htab->root.dynobj; |
| 994 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 995 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 996 | sym_hashes = elf_sym_hashes (input_bfd); |
| 997 | relend = relocs + input_section->reloc_count; |
| 998 | |
| 999 | sgot = NULL; |
| 1000 | splt = NULL; |
| 1001 | sreloc = NULL; |
| 1002 | srelgot = NULL; |
| 1003 | |
| 1004 | if (dynobj != NULL) |
| 1005 | { |
| 1006 | splt = htab->root.splt; |
| 1007 | sgot = htab->root.sgot; |
| 1008 | } |
| 1009 | |
| 1010 | for (rel = relocs; rel < relend; rel ++) |
| 1011 | { |
| 1012 | reloc_howto_type *howto; |
| 1013 | unsigned long r_symndx; |
| 1014 | Elf_Internal_Sym *sym; |
| 1015 | asection *sec; |
| 1016 | struct elf_link_hash_entry *h; |
| 1017 | bfd_vma relocation; |
| 1018 | bfd_reloc_status_type r; |
| 1019 | const char *symname = NULL; |
| 1020 | enum elf_cris_reloc_type r_type; |
| 1021 | |
| 1022 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1023 | |
| 1024 | if ( r_type == R_CRIS_GNU_VTINHERIT |
| 1025 | || r_type == R_CRIS_GNU_VTENTRY) |
| 1026 | continue; |
| 1027 | |
| 1028 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1029 | howto = cris_elf_howto_table + r_type; |
| 1030 | h = NULL; |
| 1031 | sym = NULL; |
| 1032 | sec = NULL; |
| 1033 | |
| 1034 | if (r_symndx < symtab_hdr->sh_info) |
| 1035 | { |
| 1036 | sym = local_syms + r_symndx; |
| 1037 | sec = local_sections [r_symndx]; |
| 1038 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1039 | |
| 1040 | symname = (bfd_elf_string_from_elf_section |
| 1041 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1042 | if (symname == NULL) |
| 1043 | symname = bfd_section_name (input_bfd, sec); |
| 1044 | } |
| 1045 | else |
| 1046 | { |
| 1047 | bfd_boolean warned, ignored; |
| 1048 | bfd_boolean unresolved_reloc; |
| 1049 | |
| 1050 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1051 | r_symndx, symtab_hdr, sym_hashes, |
| 1052 | h, sec, relocation, |
| 1053 | unresolved_reloc, warned, ignored); |
| 1054 | |
| 1055 | symname = h->root.root.string; |
| 1056 | |
| 1057 | if (unresolved_reloc |
| 1058 | /* Perhaps we should detect the cases that |
| 1059 | sec->output_section is expected to be NULL like i386 and |
| 1060 | m68k, but apparently (and according to elfxx-ia64.c) all |
| 1061 | valid cases are where the symbol is defined in a shared |
| 1062 | object which we link dynamically against. This includes |
| 1063 | PLT relocs for which we've created a PLT entry and other |
| 1064 | relocs for which we're prepared to create dynamic |
| 1065 | relocations. |
| 1066 | |
| 1067 | For now, new situations cause us to just err when |
| 1068 | sec->output_offset is NULL but the object with the symbol |
| 1069 | is *not* dynamically linked against. Thus this will |
| 1070 | automatically remind us so we can see if there are other |
| 1071 | valid cases we need to revisit. */ |
| 1072 | && (sec->owner->flags & DYNAMIC) != 0) |
| 1073 | relocation = 0; |
| 1074 | |
| 1075 | else if (h->root.type == bfd_link_hash_defined |
| 1076 | || h->root.type == bfd_link_hash_defweak) |
| 1077 | { |
| 1078 | /* Here follow the cases where the relocation value must |
| 1079 | be zero (or when further handling is simplified when |
| 1080 | zero). I can't claim to understand the various |
| 1081 | conditions and they weren't described in the files |
| 1082 | where I copied them from (elf32-m68k.c and |
| 1083 | elf32-i386.c), but let's mention examples of where |
| 1084 | they happen. FIXME: Perhaps define and use a |
| 1085 | dynamic_symbol_p function like ia64. |
| 1086 | |
| 1087 | - When creating a shared library, we can have an |
| 1088 | ordinary relocation for a symbol defined in a shared |
| 1089 | library (perhaps the one we create). We then make |
| 1090 | the relocation value zero, as the value seen now will |
| 1091 | be added into the relocation addend in this shared |
| 1092 | library, but must be handled only at dynamic-link |
| 1093 | time. FIXME: Not sure this example covers the |
| 1094 | h->elf_link_hash_flags test, though it's there in |
| 1095 | other targets. */ |
| 1096 | if (bfd_link_pic (info) |
| 1097 | && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1) |
| 1098 | || !h->def_regular) |
| 1099 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1100 | && (r_type == R_CRIS_8 |
| 1101 | || r_type == R_CRIS_16 |
| 1102 | || r_type == R_CRIS_32 |
| 1103 | || r_type == R_CRIS_8_PCREL |
| 1104 | || r_type == R_CRIS_16_PCREL |
| 1105 | || r_type == R_CRIS_32_PCREL)) |
| 1106 | relocation = 0; |
| 1107 | else if (!bfd_link_relocatable (info) && unresolved_reloc |
| 1108 | && (_bfd_elf_section_offset (output_bfd, info, |
| 1109 | input_section, |
| 1110 | rel->r_offset) |
| 1111 | != (bfd_vma) -1)) |
| 1112 | { |
| 1113 | _bfd_error_handler |
| 1114 | /* xgettext:c-format */ |
| 1115 | (_("%B, section %A: unresolvable relocation %s against symbol `%s'"), |
| 1116 | input_bfd, |
| 1117 | input_section, |
| 1118 | cris_elf_howto_table[r_type].name, |
| 1119 | symname); |
| 1120 | bfd_set_error (bfd_error_bad_value); |
| 1121 | return FALSE; |
| 1122 | } |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | if (sec != NULL && discarded_section (sec)) |
| 1127 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 1128 | rel, 1, relend, howto, 0, contents); |
| 1129 | |
| 1130 | if (bfd_link_relocatable (info)) |
| 1131 | continue; |
| 1132 | |
| 1133 | switch (r_type) |
| 1134 | { |
| 1135 | case R_CRIS_16_GOTPLT: |
| 1136 | case R_CRIS_32_GOTPLT: |
| 1137 | /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT, |
| 1138 | but we require a PLT, and the PLT handling will take care of |
| 1139 | filling in the PLT-specific GOT entry. For the GOT offset, |
| 1140 | calculate it as we do when filling it in for the .got.plt |
| 1141 | section. If we don't have a PLT, punt to GOT handling. */ |
| 1142 | if (h != NULL |
| 1143 | && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0) |
| 1144 | { |
| 1145 | asection *sgotplt = htab->root.sgotplt; |
| 1146 | bfd_vma got_offset; |
| 1147 | |
| 1148 | BFD_ASSERT (h->dynindx != -1); |
| 1149 | BFD_ASSERT (sgotplt != NULL); |
| 1150 | |
| 1151 | got_offset |
| 1152 | = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; |
| 1153 | |
| 1154 | relocation = got_offset; |
| 1155 | break; |
| 1156 | } |
| 1157 | |
| 1158 | /* We didn't make a PLT entry for this symbol. Maybe everything is |
| 1159 | folded into the GOT. Other than folding, this happens when |
| 1160 | statically linking PIC code, or when using -Bsymbolic. Check |
| 1161 | that we instead have a GOT entry as done for us by |
| 1162 | elf_cris_adjust_dynamic_symbol, and drop through into the |
| 1163 | ordinary GOT cases. This must not happen for the |
| 1164 | executable, because any reference it does to a function |
| 1165 | that is satisfied by a DSO must generate a PLT. We assume |
| 1166 | these call-specific relocs don't address non-functions. */ |
| 1167 | if (h != NULL |
| 1168 | && (h->got.offset == (bfd_vma) -1 |
| 1169 | || (!bfd_link_pic (info) |
| 1170 | && !(h->def_regular |
| 1171 | || (!h->def_dynamic |
| 1172 | && h->root.type == bfd_link_hash_undefweak))))) |
| 1173 | { |
| 1174 | _bfd_error_handler |
| 1175 | ((h->got.offset == (bfd_vma) -1) |
| 1176 | /* xgettext:c-format */ |
| 1177 | ? _("%B, section %A: No PLT nor GOT for relocation %s" |
| 1178 | " against symbol `%s'") |
| 1179 | /* xgettext:c-format */ |
| 1180 | : _("%B, section %A: No PLT for relocation %s" |
| 1181 | " against symbol `%s'"), |
| 1182 | input_bfd, |
| 1183 | input_section, |
| 1184 | cris_elf_howto_table[r_type].name, |
| 1185 | (symname != NULL && symname[0] != '\0' |
| 1186 | ? symname : _("[whose name is lost]"))); |
| 1187 | |
| 1188 | /* FIXME: Perhaps blaming input is not the right thing to |
| 1189 | do; this is probably an internal error. But it is true |
| 1190 | that we didn't like that particular input. */ |
| 1191 | bfd_set_error (bfd_error_bad_value); |
| 1192 | return FALSE; |
| 1193 | } |
| 1194 | /* Fall through. */ |
| 1195 | |
| 1196 | /* The size of the actual relocation is not used here; we only |
| 1197 | fill in the GOT table here. */ |
| 1198 | case R_CRIS_16_GOT: |
| 1199 | case R_CRIS_32_GOT: |
| 1200 | { |
| 1201 | bfd_vma off; |
| 1202 | |
| 1203 | /* Note that despite using RELA relocations, the .got contents |
| 1204 | is always filled in with the link-relative relocation |
| 1205 | value; the addend. */ |
| 1206 | |
| 1207 | if (h != NULL) |
| 1208 | { |
| 1209 | off = h->got.offset; |
| 1210 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1211 | |
| 1212 | if (!elf_hash_table (info)->dynamic_sections_created |
| 1213 | || (! bfd_link_pic (info) |
| 1214 | && (h->def_regular |
| 1215 | || h->type == STT_FUNC |
| 1216 | || h->needs_plt)) |
| 1217 | || (bfd_link_pic (info) |
| 1218 | && (SYMBOLIC_BIND (info, h) || h->dynindx == -1) |
| 1219 | && h->def_regular)) |
| 1220 | { |
| 1221 | /* This wasn't checked above for ! bfd_link_pic (info), but |
| 1222 | must hold there if we get here; the symbol must |
| 1223 | be defined in the regular program or be undefweak |
| 1224 | or be a function or otherwise need a PLT. */ |
| 1225 | BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created |
| 1226 | || bfd_link_pic (info) |
| 1227 | || h->def_regular |
| 1228 | || h->type == STT_FUNC |
| 1229 | || h->needs_plt |
| 1230 | || h->root.type == bfd_link_hash_undefweak); |
| 1231 | |
| 1232 | /* This is actually a static link, or it is a |
| 1233 | -Bsymbolic link and the symbol is defined locally, |
| 1234 | or is undefweak, or the symbol was forced to be |
| 1235 | local because of a version file, or we're not |
| 1236 | creating a dynamic object. We must initialize this |
| 1237 | entry in the global offset table. Since the offset |
| 1238 | must always be a multiple of 4, we use the least |
| 1239 | significant bit to record whether we have |
| 1240 | initialized it already. |
| 1241 | |
| 1242 | If this GOT entry should be runtime-initialized, we |
| 1243 | will create a .rela.got relocation entry to |
| 1244 | initialize the value. This is done in the |
| 1245 | finish_dynamic_symbol routine. */ |
| 1246 | if ((off & 1) != 0) |
| 1247 | off &= ~1; |
| 1248 | else |
| 1249 | { |
| 1250 | bfd_put_32 (output_bfd, relocation, |
| 1251 | sgot->contents + off); |
| 1252 | h->got.offset |= 1; |
| 1253 | } |
| 1254 | } |
| 1255 | } |
| 1256 | else |
| 1257 | { |
| 1258 | BFD_ASSERT (local_got_offsets != NULL |
| 1259 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 1260 | |
| 1261 | off = local_got_offsets[r_symndx]; |
| 1262 | |
| 1263 | /* The offset must always be a multiple of 4. We use |
| 1264 | the least significant bit to record whether we have |
| 1265 | already generated the necessary reloc. */ |
| 1266 | if ((off & 1) != 0) |
| 1267 | off &= ~1; |
| 1268 | else |
| 1269 | { |
| 1270 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1271 | |
| 1272 | if (bfd_link_pic (info)) |
| 1273 | { |
| 1274 | Elf_Internal_Rela outrel; |
| 1275 | bfd_byte *loc; |
| 1276 | |
| 1277 | srelgot = htab->root.srelgot; |
| 1278 | BFD_ASSERT (srelgot != NULL); |
| 1279 | |
| 1280 | outrel.r_offset = (sgot->output_section->vma |
| 1281 | + sgot->output_offset |
| 1282 | + off); |
| 1283 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); |
| 1284 | outrel.r_addend = relocation; |
| 1285 | loc = srelgot->contents; |
| 1286 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1287 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1288 | } |
| 1289 | |
| 1290 | local_got_offsets[r_symndx] |= 1; |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | relocation = sgot->output_offset + off; |
| 1295 | if (rel->r_addend != 0) |
| 1296 | { |
| 1297 | /* We can't do anything for a relocation which is against |
| 1298 | a symbol *plus offset*. GOT holds relocations for |
| 1299 | symbols. Make this an error; the compiler isn't |
| 1300 | allowed to pass us these kinds of things. */ |
| 1301 | if (h == NULL) |
| 1302 | _bfd_error_handler |
| 1303 | /* xgettext:c-format */ |
| 1304 | (_("%B, section %A: relocation %s with non-zero addend %d" |
| 1305 | " against local symbol"), |
| 1306 | input_bfd, |
| 1307 | input_section, |
| 1308 | cris_elf_howto_table[r_type].name, |
| 1309 | rel->r_addend); |
| 1310 | else |
| 1311 | _bfd_error_handler |
| 1312 | /* xgettext:c-format */ |
| 1313 | (_("%B, section %A: relocation %s with non-zero addend %d" |
| 1314 | " against symbol `%s'"), |
| 1315 | input_bfd, |
| 1316 | input_section, |
| 1317 | cris_elf_howto_table[r_type].name, |
| 1318 | rel->r_addend, |
| 1319 | symname[0] != '\0' ? symname : _("[whose name is lost]")); |
| 1320 | |
| 1321 | bfd_set_error (bfd_error_bad_value); |
| 1322 | return FALSE; |
| 1323 | } |
| 1324 | } |
| 1325 | break; |
| 1326 | |
| 1327 | case R_CRIS_32_GOTREL: |
| 1328 | /* This relocation must only be performed against local symbols. |
| 1329 | It's also ok when we link a program and the symbol is either |
| 1330 | defined in an ordinary (non-DSO) object or is undefined weak. */ |
| 1331 | if (h != NULL |
| 1332 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1333 | && !(!bfd_link_pic (info) |
| 1334 | && (h->def_regular |
| 1335 | || (!h->def_dynamic |
| 1336 | && h->root.type == bfd_link_hash_undefweak)))) |
| 1337 | { |
| 1338 | _bfd_error_handler |
| 1339 | /* xgettext:c-format */ |
| 1340 | (_("%B, section %A: relocation %s is" |
| 1341 | " not allowed for global symbol: `%s'"), |
| 1342 | input_bfd, |
| 1343 | input_section, |
| 1344 | cris_elf_howto_table[r_type].name, |
| 1345 | symname); |
| 1346 | bfd_set_error (bfd_error_bad_value); |
| 1347 | return FALSE; |
| 1348 | } |
| 1349 | |
| 1350 | /* This can happen if we get a link error with the input ELF |
| 1351 | variant mismatching the output variant. Emit an error so |
| 1352 | it's noticed if it happens elsewhere. */ |
| 1353 | if (sgot == NULL) |
| 1354 | { |
| 1355 | _bfd_error_handler |
| 1356 | /* xgettext:c-format */ |
| 1357 | (_("%B, section %A: relocation %s with no GOT created"), |
| 1358 | input_bfd, |
| 1359 | input_section, |
| 1360 | cris_elf_howto_table[r_type].name); |
| 1361 | bfd_set_error (bfd_error_bad_value); |
| 1362 | return FALSE; |
| 1363 | } |
| 1364 | |
| 1365 | /* This relocation is like a PC-relative one, except the |
| 1366 | reference point is the location of GOT. Note that |
| 1367 | sgot->output_offset is not involved in this calculation. We |
| 1368 | always want the start of entire .got section, not the |
| 1369 | position after the reserved header. */ |
| 1370 | relocation -= sgot->output_section->vma; |
| 1371 | break; |
| 1372 | |
| 1373 | case R_CRIS_32_PLT_PCREL: |
| 1374 | /* Relocation is to the entry for this symbol in the |
| 1375 | procedure linkage table. */ |
| 1376 | |
| 1377 | /* Resolve a PLT_PCREL reloc against a local symbol directly, |
| 1378 | without using the procedure linkage table. */ |
| 1379 | if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 1380 | break; |
| 1381 | |
| 1382 | if (h->plt.offset == (bfd_vma) -1 |
| 1383 | || splt == NULL) |
| 1384 | { |
| 1385 | /* We didn't make a PLT entry for this symbol. This |
| 1386 | happens when statically linking PIC code, or when |
| 1387 | using -Bsymbolic. */ |
| 1388 | break; |
| 1389 | } |
| 1390 | |
| 1391 | relocation = (splt->output_section->vma |
| 1392 | + splt->output_offset |
| 1393 | + h->plt.offset); |
| 1394 | break; |
| 1395 | |
| 1396 | case R_CRIS_32_PLT_GOTREL: |
| 1397 | /* Like R_CRIS_32_PLT_PCREL, but the reference point is the |
| 1398 | start of the .got section. See also comment at |
| 1399 | R_CRIS_32_GOT. */ |
| 1400 | relocation -= sgot->output_section->vma; |
| 1401 | |
| 1402 | /* Resolve a PLT_GOTREL reloc against a local symbol directly, |
| 1403 | without using the procedure linkage table. */ |
| 1404 | if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 1405 | break; |
| 1406 | |
| 1407 | if (h->plt.offset == (bfd_vma) -1 |
| 1408 | || splt == NULL) |
| 1409 | { |
| 1410 | /* We didn't make a PLT entry for this symbol. This |
| 1411 | happens when statically linking PIC code, or when |
| 1412 | using -Bsymbolic. */ |
| 1413 | break; |
| 1414 | } |
| 1415 | |
| 1416 | relocation = (splt->output_section->vma |
| 1417 | + splt->output_offset |
| 1418 | + h->plt.offset |
| 1419 | - sgot->output_section->vma); |
| 1420 | break; |
| 1421 | |
| 1422 | case R_CRIS_8_PCREL: |
| 1423 | case R_CRIS_16_PCREL: |
| 1424 | case R_CRIS_32_PCREL: |
| 1425 | /* If the symbol was local, we need no shlib-specific handling. */ |
| 1426 | if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 1427 | || h->dynindx == -1) |
| 1428 | break; |
| 1429 | |
| 1430 | /* Fall through. */ |
| 1431 | case R_CRIS_8: |
| 1432 | case R_CRIS_16: |
| 1433 | case R_CRIS_32: |
| 1434 | if (bfd_link_pic (info) |
| 1435 | && r_symndx != STN_UNDEF |
| 1436 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1437 | && ((r_type != R_CRIS_8_PCREL |
| 1438 | && r_type != R_CRIS_16_PCREL |
| 1439 | && r_type != R_CRIS_32_PCREL) |
| 1440 | || (!SYMBOLIC_BIND (info, h) |
| 1441 | || (h != NULL && !h->def_regular)))) |
| 1442 | { |
| 1443 | Elf_Internal_Rela outrel; |
| 1444 | bfd_byte *loc; |
| 1445 | bfd_boolean skip, relocate; |
| 1446 | |
| 1447 | /* When generating a shared object, these relocations |
| 1448 | are copied into the output file to be resolved at run |
| 1449 | time. */ |
| 1450 | |
| 1451 | if (sreloc == NULL) |
| 1452 | { |
| 1453 | sreloc = _bfd_elf_get_dynamic_reloc_section |
| 1454 | (dynobj, input_section, /*rela?*/ TRUE); |
| 1455 | /* The section should have been created in cris_elf_check_relocs, |
| 1456 | but that function will not be called for objects which fail in |
| 1457 | cris_elf_merge_private_bfd_data. */ |
| 1458 | if (sreloc == NULL) |
| 1459 | { |
| 1460 | bfd_set_error (bfd_error_bad_value); |
| 1461 | return FALSE; |
| 1462 | } |
| 1463 | } |
| 1464 | |
| 1465 | skip = FALSE; |
| 1466 | relocate = FALSE; |
| 1467 | |
| 1468 | outrel.r_offset = |
| 1469 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 1470 | rel->r_offset); |
| 1471 | if (outrel.r_offset == (bfd_vma) -1) |
| 1472 | skip = TRUE; |
| 1473 | else if (outrel.r_offset == (bfd_vma) -2 |
| 1474 | /* For now, undefined weak symbols with non-default |
| 1475 | visibility (yielding 0), like exception info for |
| 1476 | discarded sections, will get a R_CRIS_NONE |
| 1477 | relocation rather than no relocation, because we |
| 1478 | notice too late that the symbol doesn't need a |
| 1479 | relocation. */ |
| 1480 | || (h != NULL |
| 1481 | && h->root.type == bfd_link_hash_undefweak |
| 1482 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)) |
| 1483 | skip = TRUE, relocate = TRUE; |
| 1484 | outrel.r_offset += (input_section->output_section->vma |
| 1485 | + input_section->output_offset); |
| 1486 | |
| 1487 | if (skip) |
| 1488 | memset (&outrel, 0, sizeof outrel); |
| 1489 | /* h->dynindx may be -1 if the symbol was marked to |
| 1490 | become local. */ |
| 1491 | else if (h != NULL |
| 1492 | && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1) |
| 1493 | || !h->def_regular)) |
| 1494 | { |
| 1495 | BFD_ASSERT (h->dynindx != -1); |
| 1496 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 1497 | outrel.r_addend = relocation + rel->r_addend; |
| 1498 | } |
| 1499 | else |
| 1500 | { |
| 1501 | outrel.r_addend = relocation + rel->r_addend; |
| 1502 | |
| 1503 | if (r_type == R_CRIS_32) |
| 1504 | { |
| 1505 | relocate = TRUE; |
| 1506 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); |
| 1507 | } |
| 1508 | else |
| 1509 | { |
| 1510 | long indx; |
| 1511 | |
| 1512 | if (bfd_is_abs_section (sec)) |
| 1513 | indx = 0; |
| 1514 | else if (sec == NULL || sec->owner == NULL) |
| 1515 | { |
| 1516 | bfd_set_error (bfd_error_bad_value); |
| 1517 | return FALSE; |
| 1518 | } |
| 1519 | else |
| 1520 | { |
| 1521 | asection *osec; |
| 1522 | |
| 1523 | /* We are turning this relocation into one |
| 1524 | against a section symbol. It would be |
| 1525 | proper to subtract the symbol's value, |
| 1526 | osec->vma, from the emitted reloc addend, |
| 1527 | but ld.so expects buggy relocs. */ |
| 1528 | osec = sec->output_section; |
| 1529 | indx = elf_section_data (osec)->dynindx; |
| 1530 | if (indx == 0) |
| 1531 | { |
| 1532 | osec = htab->root.text_index_section; |
| 1533 | indx = elf_section_data (osec)->dynindx; |
| 1534 | } |
| 1535 | BFD_ASSERT (indx != 0); |
| 1536 | } |
| 1537 | |
| 1538 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 1539 | } |
| 1540 | } |
| 1541 | |
| 1542 | loc = sreloc->contents; |
| 1543 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1544 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1545 | |
| 1546 | /* This reloc will be computed at runtime, so there's no |
| 1547 | need to do anything now, except for R_CRIS_32 relocations |
| 1548 | that have been turned into R_CRIS_RELATIVE. */ |
| 1549 | if (!relocate) |
| 1550 | continue; |
| 1551 | } |
| 1552 | |
| 1553 | break; |
| 1554 | |
| 1555 | case R_CRIS_16_DTPREL: |
| 1556 | case R_CRIS_32_DTPREL: |
| 1557 | /* This relocation must only be performed against local |
| 1558 | symbols, or to sections that are not loadable. It's also |
| 1559 | ok when we link a program and the symbol is defined in an |
| 1560 | ordinary (non-DSO) object (if it's undefined there, we've |
| 1561 | already seen an error). */ |
| 1562 | if (h != NULL |
| 1563 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1564 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1565 | && (bfd_link_pic (info) |
| 1566 | || (!h->def_regular |
| 1567 | && h->root.type != bfd_link_hash_undefined))) |
| 1568 | { |
| 1569 | _bfd_error_handler |
| 1570 | ((h->root.type == bfd_link_hash_undefined) |
| 1571 | /* We shouldn't get here for GCC-emitted code. */ |
| 1572 | /* xgettext:c-format */ |
| 1573 | ? _("%B, section %A: relocation %s has an undefined" |
| 1574 | " reference to `%s', perhaps a declaration mixup?") |
| 1575 | /* xgettext:c-format */ |
| 1576 | : _("%B, section %A: relocation %s is" |
| 1577 | " not allowed for `%s', a global symbol with default" |
| 1578 | " visibility, perhaps a declaration mixup?"), |
| 1579 | input_bfd, |
| 1580 | input_section, |
| 1581 | cris_elf_howto_table[r_type].name, |
| 1582 | symname != NULL && symname[0] != '\0' |
| 1583 | ? symname : _("[whose name is lost]")); |
| 1584 | bfd_set_error (bfd_error_bad_value); |
| 1585 | return FALSE; |
| 1586 | } |
| 1587 | |
| 1588 | BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0 |
| 1589 | || htab->dtpmod_refcount != 0); |
| 1590 | |
| 1591 | /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't |
| 1592 | already done so. Note that we do this in .got.plt, not |
| 1593 | in .got, as .got.plt contains the first part, still the |
| 1594 | reloc is against .got, because the linker script directs |
| 1595 | (is required to direct) them both into .got. */ |
| 1596 | if (htab->dtpmod_refcount > 0 |
| 1597 | && (input_section->flags & SEC_ALLOC) != 0) |
| 1598 | { |
| 1599 | asection *sgotplt = htab->root.sgotplt; |
| 1600 | BFD_ASSERT (sgotplt != NULL); |
| 1601 | |
| 1602 | if (bfd_link_pic (info)) |
| 1603 | { |
| 1604 | Elf_Internal_Rela outrel; |
| 1605 | bfd_byte *loc; |
| 1606 | |
| 1607 | srelgot = htab->root.srelgot; |
| 1608 | BFD_ASSERT (srelgot != NULL); |
| 1609 | loc = srelgot->contents; |
| 1610 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1611 | |
| 1612 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12); |
| 1613 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); |
| 1614 | outrel.r_offset = (sgotplt->output_section->vma |
| 1615 | + sgotplt->output_offset |
| 1616 | + 12); |
| 1617 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD); |
| 1618 | outrel.r_addend = 0; |
| 1619 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1620 | } |
| 1621 | else |
| 1622 | { |
| 1623 | /* For an executable, the GOT entry contents is known. */ |
| 1624 | bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12); |
| 1625 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); |
| 1626 | } |
| 1627 | |
| 1628 | /* Reverse the sign to mark that we've emitted the |
| 1629 | required GOT entry. */ |
| 1630 | htab->dtpmod_refcount = - htab->dtpmod_refcount; |
| 1631 | } |
| 1632 | |
| 1633 | /* The relocation is the offset from the start of the module |
| 1634 | TLS block to the (local) symbol. */ |
| 1635 | relocation -= elf_hash_table (info)->tls_sec == NULL |
| 1636 | ? 0 : elf_hash_table (info)->tls_sec->vma; |
| 1637 | break; |
| 1638 | |
| 1639 | case R_CRIS_32_GD: |
| 1640 | if (bfd_link_pic (info)) |
| 1641 | { |
| 1642 | bfd_set_error (bfd_error_invalid_operation); |
| 1643 | |
| 1644 | /* We've already informed in cris_elf_check_relocs that |
| 1645 | this is an error. */ |
| 1646 | return FALSE; |
| 1647 | } |
| 1648 | /* Fall through. */ |
| 1649 | |
| 1650 | case R_CRIS_16_GOT_GD: |
| 1651 | case R_CRIS_32_GOT_GD: |
| 1652 | if (rel->r_addend != 0) |
| 1653 | { |
| 1654 | /* We can't do anything for a relocation which is against a |
| 1655 | symbol *plus offset*. The GOT holds relocations for |
| 1656 | symbols. Make this an error; the compiler isn't allowed |
| 1657 | to pass us these kinds of things. */ |
| 1658 | _bfd_error_handler |
| 1659 | /* xgettext:c-format */ |
| 1660 | (_("%B, section %A: relocation %s with non-zero addend %d" |
| 1661 | " against symbol `%s'"), |
| 1662 | input_bfd, |
| 1663 | input_section, |
| 1664 | cris_elf_howto_table[r_type].name, |
| 1665 | rel->r_addend, |
| 1666 | symname[0] != '\0' ? symname : _("[whose name is lost]")); |
| 1667 | |
| 1668 | bfd_set_error (bfd_error_bad_value); |
| 1669 | return FALSE; |
| 1670 | } |
| 1671 | |
| 1672 | if (!bfd_link_pic (info) |
| 1673 | && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) |
| 1674 | { |
| 1675 | /* Known contents of the GOT. */ |
| 1676 | bfd_vma off; |
| 1677 | |
| 1678 | /* The symbol is defined in the program, so just write |
| 1679 | (1, known_tpoffset) into the GOT. */ |
| 1680 | relocation -= elf_hash_table (info)->tls_sec->vma; |
| 1681 | |
| 1682 | if (h != NULL) |
| 1683 | { |
| 1684 | off = elf_cris_hash_entry (h)->tprel_refcount > 0 |
| 1685 | ? h->got.offset + 4 : h->got.offset; |
| 1686 | } |
| 1687 | else |
| 1688 | { |
| 1689 | off = local_got_offsets[r_symndx]; |
| 1690 | if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) |
| 1691 | off += 4; |
| 1692 | } |
| 1693 | |
| 1694 | /* We use bit 1 of the offset as a flag for GOT entry with |
| 1695 | the R_CRIS_DTP reloc, setting it when we've emitted the |
| 1696 | GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL |
| 1697 | relocs. */ |
| 1698 | if ((off & 2) == 0) |
| 1699 | { |
| 1700 | off &= ~3; |
| 1701 | |
| 1702 | if (h != NULL) |
| 1703 | h->got.offset |= 2; |
| 1704 | else |
| 1705 | local_got_offsets[r_symndx] |= 2; |
| 1706 | |
| 1707 | bfd_put_32 (output_bfd, 1, sgot->contents + off); |
| 1708 | bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4); |
| 1709 | } |
| 1710 | else |
| 1711 | off &= ~3; |
| 1712 | |
| 1713 | relocation = sgot->output_offset + off |
| 1714 | + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); |
| 1715 | } |
| 1716 | else |
| 1717 | { |
| 1718 | /* Not all parts of the GOT entry are known; emit a real |
| 1719 | relocation. */ |
| 1720 | bfd_vma off; |
| 1721 | |
| 1722 | if (h != NULL) |
| 1723 | off = elf_cris_hash_entry (h)->tprel_refcount > 0 |
| 1724 | ? h->got.offset + 4 : h->got.offset; |
| 1725 | else |
| 1726 | { |
| 1727 | off = local_got_offsets[r_symndx]; |
| 1728 | if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) |
| 1729 | off += 4; |
| 1730 | } |
| 1731 | |
| 1732 | /* See above re bit 1 and bit 0 usage. */ |
| 1733 | if ((off & 2) == 0) |
| 1734 | { |
| 1735 | Elf_Internal_Rela outrel; |
| 1736 | bfd_byte *loc; |
| 1737 | |
| 1738 | off &= ~3; |
| 1739 | |
| 1740 | if (h != NULL) |
| 1741 | h->got.offset |= 2; |
| 1742 | else |
| 1743 | local_got_offsets[r_symndx] |= 2; |
| 1744 | |
| 1745 | /* Clear the target contents of the GOT (just as a |
| 1746 | gesture; it's already cleared on allocation): this |
| 1747 | relocation is not like the other dynrelocs. */ |
| 1748 | bfd_put_32 (output_bfd, 0, sgot->contents + off); |
| 1749 | bfd_put_32 (output_bfd, 0, sgot->contents + off + 4); |
| 1750 | |
| 1751 | srelgot = htab->root.srelgot; |
| 1752 | BFD_ASSERT (srelgot != NULL); |
| 1753 | |
| 1754 | if (h != NULL && h->dynindx != -1) |
| 1755 | { |
| 1756 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP); |
| 1757 | relocation = 0; |
| 1758 | } |
| 1759 | else |
| 1760 | { |
| 1761 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP); |
| 1762 | |
| 1763 | /* NULL if we had an error. */ |
| 1764 | relocation -= elf_hash_table (info)->tls_sec == NULL |
| 1765 | ? 0 : elf_hash_table (info)->tls_sec->vma; |
| 1766 | } |
| 1767 | |
| 1768 | outrel.r_offset = (sgot->output_section->vma |
| 1769 | + sgot->output_offset |
| 1770 | + off); |
| 1771 | outrel.r_addend = relocation; |
| 1772 | loc = srelgot->contents; |
| 1773 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1774 | |
| 1775 | /* NULL if we had an error. */ |
| 1776 | if (srelgot->contents != NULL) |
| 1777 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1778 | } |
| 1779 | else |
| 1780 | off &= ~3; |
| 1781 | |
| 1782 | relocation = sgot->output_offset + off |
| 1783 | + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); |
| 1784 | } |
| 1785 | |
| 1786 | /* The GOT-relative offset to the GOT entry is the |
| 1787 | relocation, or for R_CRIS_32_GD, the actual address of |
| 1788 | the GOT entry. */ |
| 1789 | break; |
| 1790 | |
| 1791 | case R_CRIS_32_IE: |
| 1792 | if (bfd_link_pic (info)) |
| 1793 | { |
| 1794 | bfd_set_error (bfd_error_invalid_operation); |
| 1795 | |
| 1796 | /* We've already informed in cris_elf_check_relocs that |
| 1797 | this is an error. */ |
| 1798 | return FALSE; |
| 1799 | } |
| 1800 | /* Fall through. */ |
| 1801 | |
| 1802 | case R_CRIS_32_GOT_TPREL: |
| 1803 | case R_CRIS_16_GOT_TPREL: |
| 1804 | if (rel->r_addend != 0) |
| 1805 | { |
| 1806 | /* We can't do anything for a relocation which is |
| 1807 | against a symbol *plus offset*. GOT holds |
| 1808 | relocations for symbols. Make this an error; the |
| 1809 | compiler isn't allowed to pass us these kinds of |
| 1810 | things. */ |
| 1811 | _bfd_error_handler |
| 1812 | /* xgettext:c-format */ |
| 1813 | (_("%B, section %A: relocation %s with non-zero addend %d" |
| 1814 | " against symbol `%s'"), |
| 1815 | input_bfd, |
| 1816 | input_section, |
| 1817 | cris_elf_howto_table[r_type].name, |
| 1818 | rel->r_addend, |
| 1819 | symname[0] != '\0' ? symname : _("[whose name is lost]")); |
| 1820 | bfd_set_error (bfd_error_bad_value); |
| 1821 | return FALSE; |
| 1822 | } |
| 1823 | |
| 1824 | if (!bfd_link_pic (info) |
| 1825 | && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) |
| 1826 | { |
| 1827 | /* Known contents of the GOT. */ |
| 1828 | bfd_vma off; |
| 1829 | |
| 1830 | /* The symbol is defined in the program, so just write |
| 1831 | the -prog_tls_size+known_tpoffset into the GOT. */ |
| 1832 | relocation -= elf_hash_table (info)->tls_sec->vma; |
| 1833 | relocation -= elf_hash_table (info)->tls_size; |
| 1834 | |
| 1835 | if (h != NULL) |
| 1836 | off = h->got.offset; |
| 1837 | else |
| 1838 | off = local_got_offsets[r_symndx]; |
| 1839 | |
| 1840 | /* Bit 0 is used to mark whether we've emitted the required |
| 1841 | entry (and if needed R_CRIS_32_TPREL reloc). Bit 1 |
| 1842 | is used similarly for R_CRIS_DTP, see above. */ |
| 1843 | if ((off & 1) == 0) |
| 1844 | { |
| 1845 | off &= ~3; |
| 1846 | |
| 1847 | if (h != NULL) |
| 1848 | h->got.offset |= 1; |
| 1849 | else |
| 1850 | local_got_offsets[r_symndx] |= 1; |
| 1851 | |
| 1852 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1853 | } |
| 1854 | else |
| 1855 | off &= ~3; |
| 1856 | |
| 1857 | relocation = sgot->output_offset + off |
| 1858 | + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); |
| 1859 | } |
| 1860 | else |
| 1861 | { |
| 1862 | /* Emit a real relocation. */ |
| 1863 | bfd_vma off; |
| 1864 | |
| 1865 | if (h != NULL) |
| 1866 | off = h->got.offset; |
| 1867 | else |
| 1868 | off = local_got_offsets[r_symndx]; |
| 1869 | |
| 1870 | /* See above re usage of bit 0 and 1. */ |
| 1871 | if ((off & 1) == 0) |
| 1872 | { |
| 1873 | Elf_Internal_Rela outrel; |
| 1874 | bfd_byte *loc; |
| 1875 | |
| 1876 | off &= ~3; |
| 1877 | |
| 1878 | if (h != NULL) |
| 1879 | h->got.offset |= 1; |
| 1880 | else |
| 1881 | local_got_offsets[r_symndx] |= 1; |
| 1882 | |
| 1883 | srelgot = htab->root.srelgot; |
| 1884 | BFD_ASSERT (srelgot != NULL); |
| 1885 | |
| 1886 | if (h != NULL && h->dynindx != -1) |
| 1887 | { |
| 1888 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL); |
| 1889 | relocation = 0; |
| 1890 | } |
| 1891 | else |
| 1892 | { |
| 1893 | outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL); |
| 1894 | |
| 1895 | /* NULL if we had an error. */ |
| 1896 | relocation -= elf_hash_table (info)->tls_sec == NULL |
| 1897 | ? 0 : elf_hash_table (info)->tls_sec->vma; |
| 1898 | } |
| 1899 | |
| 1900 | /* Just "define" the initial contents in some |
| 1901 | semi-logical way. */ |
| 1902 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1903 | |
| 1904 | outrel.r_offset = (sgot->output_section->vma |
| 1905 | + sgot->output_offset |
| 1906 | + off); |
| 1907 | outrel.r_addend = relocation; |
| 1908 | loc = srelgot->contents; |
| 1909 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1910 | /* NULL if we had an error. */ |
| 1911 | if (srelgot->contents != NULL) |
| 1912 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1913 | } |
| 1914 | else |
| 1915 | off &= ~3; |
| 1916 | |
| 1917 | relocation = sgot->output_offset + off |
| 1918 | + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); |
| 1919 | } |
| 1920 | |
| 1921 | /* The GOT-relative offset to the GOT entry is the relocation, |
| 1922 | or for R_CRIS_32_GD, the actual address of the GOT entry. */ |
| 1923 | break; |
| 1924 | |
| 1925 | case R_CRIS_16_TPREL: |
| 1926 | case R_CRIS_32_TPREL: |
| 1927 | /* This relocation must only be performed against symbols |
| 1928 | defined in an ordinary (non-DSO) object. */ |
| 1929 | if (bfd_link_pic (info)) |
| 1930 | { |
| 1931 | bfd_set_error (bfd_error_invalid_operation); |
| 1932 | |
| 1933 | /* We've already informed in cris_elf_check_relocs that |
| 1934 | this is an error. */ |
| 1935 | return FALSE; |
| 1936 | } |
| 1937 | |
| 1938 | if (h != NULL |
| 1939 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1940 | && !(h->def_regular || ELF_COMMON_DEF_P (h)) |
| 1941 | /* If it's undefined, then an error message has already |
| 1942 | been emitted. */ |
| 1943 | && h->root.type != bfd_link_hash_undefined) |
| 1944 | { |
| 1945 | _bfd_error_handler |
| 1946 | /* xgettext:c-format */ |
| 1947 | (_("%B, section %A: relocation %s is" |
| 1948 | " not allowed for symbol: `%s'" |
| 1949 | " which is defined outside the program," |
| 1950 | " perhaps a declaration mixup?"), |
| 1951 | input_bfd, |
| 1952 | input_section, |
| 1953 | cris_elf_howto_table[r_type].name, |
| 1954 | symname); |
| 1955 | bfd_set_error (bfd_error_bad_value); |
| 1956 | return FALSE; |
| 1957 | } |
| 1958 | |
| 1959 | /* NULL if we had an error. */ |
| 1960 | relocation -= elf_hash_table (info)->tls_sec == NULL |
| 1961 | ? 0 |
| 1962 | : (elf_hash_table (info)->tls_sec->vma |
| 1963 | + elf_hash_table (info)->tls_size); |
| 1964 | |
| 1965 | /* The TLS-relative offset is the relocation. */ |
| 1966 | break; |
| 1967 | |
| 1968 | default: |
| 1969 | BFD_FAIL (); |
| 1970 | return FALSE; |
| 1971 | } |
| 1972 | |
| 1973 | r = cris_final_link_relocate (howto, input_bfd, input_section, |
| 1974 | contents, rel, relocation); |
| 1975 | |
| 1976 | if (r != bfd_reloc_ok) |
| 1977 | { |
| 1978 | const char * msg = (const char *) NULL; |
| 1979 | |
| 1980 | switch (r) |
| 1981 | { |
| 1982 | case bfd_reloc_overflow: |
| 1983 | (*info->callbacks->reloc_overflow) |
| 1984 | (info, (h ? &h->root : NULL), symname, howto->name, |
| 1985 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 1986 | if (additional_relocation_error_msg_count > 0) |
| 1987 | { |
| 1988 | additional_relocation_error_msg_count--; |
| 1989 | switch (r_type) |
| 1990 | { |
| 1991 | case R_CRIS_16_GOTPLT: |
| 1992 | case R_CRIS_16_GOT: |
| 1993 | |
| 1994 | /* Not just TLS is involved here, so we make |
| 1995 | generation and message depend on -fPIC/-fpic |
| 1996 | only. */ |
| 1997 | case R_CRIS_16_GOT_TPREL: |
| 1998 | case R_CRIS_16_GOT_GD: |
| 1999 | _bfd_error_handler |
| 2000 | (_("(too many global variables for -fpic:" |
| 2001 | " recompile with -fPIC)")); |
| 2002 | break; |
| 2003 | |
| 2004 | case R_CRIS_16_TPREL: |
| 2005 | case R_CRIS_16_DTPREL: |
| 2006 | _bfd_error_handler |
| 2007 | (_("(thread-local data too big for -fpic or" |
| 2008 | " -msmall-tls: recompile with -fPIC or" |
| 2009 | " -mno-small-tls)")); |
| 2010 | break; |
| 2011 | |
| 2012 | /* No known cause for overflow for other relocs. */ |
| 2013 | default: |
| 2014 | break; |
| 2015 | } |
| 2016 | } |
| 2017 | break; |
| 2018 | |
| 2019 | case bfd_reloc_undefined: |
| 2020 | (*info->callbacks->undefined_symbol) |
| 2021 | (info, symname, input_bfd, input_section, rel->r_offset, TRUE); |
| 2022 | break; |
| 2023 | |
| 2024 | case bfd_reloc_outofrange: |
| 2025 | msg = _("internal error: out of range error"); |
| 2026 | break; |
| 2027 | |
| 2028 | case bfd_reloc_notsupported: |
| 2029 | msg = _("internal error: unsupported relocation error"); |
| 2030 | break; |
| 2031 | |
| 2032 | case bfd_reloc_dangerous: |
| 2033 | msg = _("internal error: dangerous relocation"); |
| 2034 | break; |
| 2035 | |
| 2036 | default: |
| 2037 | msg = _("internal error: unknown error"); |
| 2038 | break; |
| 2039 | } |
| 2040 | |
| 2041 | if (msg) |
| 2042 | (*info->callbacks->warning) (info, msg, symname, input_bfd, |
| 2043 | input_section, rel->r_offset); |
| 2044 | } |
| 2045 | } |
| 2046 | |
| 2047 | return TRUE; |
| 2048 | } |
| 2049 | \f |
| 2050 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2051 | dynamic sections here. */ |
| 2052 | |
| 2053 | static bfd_boolean |
| 2054 | elf_cris_finish_dynamic_symbol (bfd *output_bfd, |
| 2055 | struct bfd_link_info *info, |
| 2056 | struct elf_link_hash_entry *h, |
| 2057 | Elf_Internal_Sym *sym) |
| 2058 | { |
| 2059 | struct elf_cris_link_hash_table * htab; |
| 2060 | |
| 2061 | /* Where in the plt entry to put values. */ |
| 2062 | int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16; |
| 2063 | |
| 2064 | /* What offset to add to the distance to the first PLT entry for the |
| 2065 | value at plt_off3. */ |
| 2066 | int plt_off3_value_bias = 4; |
| 2067 | |
| 2068 | /* Where in the PLT entry the call-dynlink-stub is (happens to be same |
| 2069 | for PIC and non-PIC for v32 and pre-v32). */ |
| 2070 | int plt_stub_offset = 8; |
| 2071 | int plt_entry_size = PLT_ENTRY_SIZE; |
| 2072 | const bfd_byte *plt_entry = elf_cris_plt_entry; |
| 2073 | const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry; |
| 2074 | |
| 2075 | htab = elf_cris_hash_table (info); |
| 2076 | if (htab == NULL) |
| 2077 | return FALSE; |
| 2078 | |
| 2079 | /* Adjust the various PLT entry offsets. */ |
| 2080 | if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) |
| 2081 | { |
| 2082 | plt_off2 = 14; |
| 2083 | plt_off3 = 20; |
| 2084 | plt_off3_value_bias = -2; |
| 2085 | plt_stub_offset = 12; |
| 2086 | plt_entry_size = PLT_ENTRY_SIZE_V32; |
| 2087 | plt_entry = elf_cris_plt_entry_v32; |
| 2088 | plt_pic_entry = elf_cris_pic_plt_entry_v32; |
| 2089 | } |
| 2090 | |
| 2091 | if (h->plt.offset != (bfd_vma) -1) |
| 2092 | { |
| 2093 | asection *splt; |
| 2094 | asection *sgotplt; |
| 2095 | asection *srela; |
| 2096 | bfd_vma got_base; |
| 2097 | |
| 2098 | bfd_vma gotplt_offset |
| 2099 | = elf_cris_hash_entry (h)->gotplt_offset; |
| 2100 | Elf_Internal_Rela rela; |
| 2101 | bfd_byte *loc; |
| 2102 | bfd_boolean has_gotplt = gotplt_offset != 0; |
| 2103 | |
| 2104 | /* Get the index in the .rela.plt relocations for the .got.plt |
| 2105 | entry that corresponds to this symbol. |
| 2106 | We have to count backwards here, and the result is only valid |
| 2107 | as an index into .rela.plt. We also have to undo the effect |
| 2108 | of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into |
| 2109 | .got.plt) for which gotplt_offset is adjusted, because while |
| 2110 | that entry goes into .got.plt, its relocation goes into |
| 2111 | .rela.got, not .rela.plt. (It's not PLT-specific; not to be |
| 2112 | processed as part of the runtime lazy .rela.plt relocation). |
| 2113 | FIXME: There be literal constants here... */ |
| 2114 | bfd_vma rela_plt_index |
| 2115 | = (htab->dtpmod_refcount != 0 |
| 2116 | ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3); |
| 2117 | |
| 2118 | /* Get the offset into the .got table of the entry that corresponds |
| 2119 | to this function. Note that we embed knowledge that "incoming" |
| 2120 | .got goes after .got.plt in the output without padding (pointer |
| 2121 | aligned). However, that knowledge is present in several other |
| 2122 | places too. */ |
| 2123 | bfd_vma got_offset |
| 2124 | = (has_gotplt |
| 2125 | ? gotplt_offset |
| 2126 | : h->got.offset + htab->next_gotplt_entry); |
| 2127 | |
| 2128 | /* This symbol has an entry in the procedure linkage table. Set it |
| 2129 | up. */ |
| 2130 | |
| 2131 | BFD_ASSERT (h->dynindx != -1); |
| 2132 | |
| 2133 | splt = htab->root.splt; |
| 2134 | sgotplt = htab->root.sgotplt; |
| 2135 | srela = htab->root.srelplt; |
| 2136 | BFD_ASSERT (splt != NULL && sgotplt != NULL |
| 2137 | && (! has_gotplt || srela != NULL)); |
| 2138 | |
| 2139 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; |
| 2140 | |
| 2141 | /* Fill in the entry in the procedure linkage table. */ |
| 2142 | if (! bfd_link_pic (info)) |
| 2143 | { |
| 2144 | memcpy (splt->contents + h->plt.offset, plt_entry, |
| 2145 | plt_entry_size); |
| 2146 | |
| 2147 | /* We need to enter the absolute address of the GOT entry here. */ |
| 2148 | bfd_put_32 (output_bfd, got_base + got_offset, |
| 2149 | splt->contents + h->plt.offset + plt_off1); |
| 2150 | } |
| 2151 | else |
| 2152 | { |
| 2153 | memcpy (splt->contents + h->plt.offset, plt_pic_entry, |
| 2154 | plt_entry_size); |
| 2155 | bfd_put_32 (output_bfd, got_offset, |
| 2156 | splt->contents + h->plt.offset + plt_off1); |
| 2157 | } |
| 2158 | |
| 2159 | /* Fill in the plt entry and make a relocation, if this is a "real" |
| 2160 | PLT entry. */ |
| 2161 | if (has_gotplt) |
| 2162 | { |
| 2163 | /* Fill in the offset to the reloc table. */ |
| 2164 | bfd_put_32 (output_bfd, |
| 2165 | rela_plt_index * sizeof (Elf32_External_Rela), |
| 2166 | splt->contents + h->plt.offset + plt_off2); |
| 2167 | |
| 2168 | /* Fill in the offset to the first PLT entry, where to "jump". */ |
| 2169 | bfd_put_32 (output_bfd, |
| 2170 | - (h->plt.offset + plt_off3 + plt_off3_value_bias), |
| 2171 | splt->contents + h->plt.offset + plt_off3); |
| 2172 | |
| 2173 | /* Fill in the entry in the global offset table with the address of |
| 2174 | the relocating stub. */ |
| 2175 | bfd_put_32 (output_bfd, |
| 2176 | (splt->output_section->vma |
| 2177 | + splt->output_offset |
| 2178 | + h->plt.offset |
| 2179 | + plt_stub_offset), |
| 2180 | sgotplt->contents + got_offset); |
| 2181 | |
| 2182 | /* Fill in the entry in the .rela.plt section. */ |
| 2183 | rela.r_offset = (sgotplt->output_section->vma |
| 2184 | + sgotplt->output_offset |
| 2185 | + got_offset); |
| 2186 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT); |
| 2187 | rela.r_addend = 0; |
| 2188 | loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela); |
| 2189 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2190 | } |
| 2191 | |
| 2192 | if (!h->def_regular) |
| 2193 | { |
| 2194 | /* Mark the symbol as undefined, rather than as defined in |
| 2195 | the .plt section. Leave the value alone. */ |
| 2196 | sym->st_shndx = SHN_UNDEF; |
| 2197 | |
| 2198 | /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't |
| 2199 | know whether resetting the value is significant; if it really |
| 2200 | is, rather than a quirk or bug in the sparc port, then I |
| 2201 | believe we'd see this elsewhere. */ |
| 2202 | /* If the symbol is weak, we do need to clear the value. |
| 2203 | Otherwise, the PLT entry would provide a definition for |
| 2204 | the symbol even if the symbol wasn't defined anywhere, |
| 2205 | and so the symbol would never be NULL. */ |
| 2206 | if (!h->ref_regular_nonweak) |
| 2207 | sym->st_value = 0; |
| 2208 | } |
| 2209 | } |
| 2210 | |
| 2211 | /* For an ordinary program, we emit .got relocs only for symbols that |
| 2212 | are in the dynamic-symbols table and are either defined by the |
| 2213 | program or are undefined weak symbols, or are function symbols |
| 2214 | where we do not output a PLT: the PLT reloc was output above and all |
| 2215 | references to the function symbol are redirected to the PLT. */ |
| 2216 | if (h->got.offset != (bfd_vma) -1 |
| 2217 | && (elf_cris_hash_entry (h)->reg_got_refcount > 0) |
| 2218 | && (bfd_link_pic (info) |
| 2219 | || (h->dynindx != -1 |
| 2220 | && h->plt.offset == (bfd_vma) -1 |
| 2221 | && !h->def_regular |
| 2222 | && h->root.type != bfd_link_hash_undefweak))) |
| 2223 | { |
| 2224 | asection *sgot; |
| 2225 | asection *srela; |
| 2226 | Elf_Internal_Rela rela; |
| 2227 | bfd_byte *loc; |
| 2228 | bfd_byte *where; |
| 2229 | |
| 2230 | /* This symbol has an entry in the global offset table. Set it up. */ |
| 2231 | |
| 2232 | sgot = htab->root.sgot; |
| 2233 | srela = htab->root.srelgot; |
| 2234 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 2235 | |
| 2236 | rela.r_offset = (sgot->output_section->vma |
| 2237 | + sgot->output_offset |
| 2238 | + (h->got.offset &~ (bfd_vma) 1)); |
| 2239 | |
| 2240 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 2241 | symbol is defined locally or was forced to be local because |
| 2242 | of a version file, we just want to emit a RELATIVE reloc. |
| 2243 | The entry in the global offset table will already have been |
| 2244 | initialized in the relocate_section function. */ |
| 2245 | where = sgot->contents + (h->got.offset &~ (bfd_vma) 1); |
| 2246 | if (! elf_hash_table (info)->dynamic_sections_created |
| 2247 | || (bfd_link_pic (info) |
| 2248 | && (SYMBOLIC_BIND (info, h) || h->dynindx == -1) |
| 2249 | && h->def_regular)) |
| 2250 | { |
| 2251 | rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); |
| 2252 | rela.r_addend = bfd_get_signed_32 (output_bfd, where); |
| 2253 | } |
| 2254 | else |
| 2255 | { |
| 2256 | bfd_put_32 (output_bfd, (bfd_vma) 0, where); |
| 2257 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT); |
| 2258 | rela.r_addend = 0; |
| 2259 | } |
| 2260 | |
| 2261 | loc = srela->contents; |
| 2262 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2263 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2264 | } |
| 2265 | |
| 2266 | if (h->needs_copy) |
| 2267 | { |
| 2268 | asection *s; |
| 2269 | Elf_Internal_Rela rela; |
| 2270 | bfd_byte *loc; |
| 2271 | |
| 2272 | /* This symbol needs a copy reloc. Set it up. */ |
| 2273 | |
| 2274 | BFD_ASSERT (h->dynindx != -1 |
| 2275 | && (h->root.type == bfd_link_hash_defined |
| 2276 | || h->root.type == bfd_link_hash_defweak)); |
| 2277 | |
| 2278 | if (h->root.u.def.section == htab->root.sdynrelro) |
| 2279 | s = htab->root.sreldynrelro; |
| 2280 | else |
| 2281 | s = htab->root.srelbss; |
| 2282 | |
| 2283 | rela.r_offset = (h->root.u.def.value |
| 2284 | + h->root.u.def.section->output_section->vma |
| 2285 | + h->root.u.def.section->output_offset); |
| 2286 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY); |
| 2287 | rela.r_addend = 0; |
| 2288 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2289 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2290 | } |
| 2291 | |
| 2292 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 2293 | if (h == elf_hash_table (info)->hdynamic |
| 2294 | || h == elf_hash_table (info)->hgot) |
| 2295 | sym->st_shndx = SHN_ABS; |
| 2296 | |
| 2297 | return TRUE; |
| 2298 | } |
| 2299 | \f |
| 2300 | /* Finish up the dynamic sections. Do *not* emit relocs here, as their |
| 2301 | offsets were changed, as part of -z combreloc handling, from those we |
| 2302 | computed. */ |
| 2303 | |
| 2304 | static bfd_boolean |
| 2305 | elf_cris_finish_dynamic_sections (bfd *output_bfd, |
| 2306 | struct bfd_link_info *info) |
| 2307 | { |
| 2308 | bfd *dynobj; |
| 2309 | asection *sgot; |
| 2310 | asection *sdyn; |
| 2311 | |
| 2312 | dynobj = elf_hash_table (info)->dynobj; |
| 2313 | |
| 2314 | sgot = elf_hash_table (info)->sgotplt; |
| 2315 | BFD_ASSERT (sgot != NULL); |
| 2316 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 2317 | |
| 2318 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2319 | { |
| 2320 | asection *splt; |
| 2321 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2322 | |
| 2323 | splt = elf_hash_table (info)->splt; |
| 2324 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 2325 | |
| 2326 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2327 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 2328 | for (; dyncon < dynconend; dyncon++) |
| 2329 | { |
| 2330 | Elf_Internal_Dyn dyn; |
| 2331 | asection *s; |
| 2332 | |
| 2333 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2334 | |
| 2335 | switch (dyn.d_tag) |
| 2336 | { |
| 2337 | default: |
| 2338 | break; |
| 2339 | |
| 2340 | case DT_PLTGOT: |
| 2341 | dyn.d_un.d_ptr = sgot->output_section->vma + sgot->output_offset; |
| 2342 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2343 | break; |
| 2344 | |
| 2345 | case DT_JMPREL: |
| 2346 | /* Yes, we *can* have a .plt and no .plt.rela, for instance |
| 2347 | if all symbols are found in the .got (not .got.plt). */ |
| 2348 | s = elf_hash_table (info)->srelplt; |
| 2349 | dyn.d_un.d_ptr = s != NULL ? (s->output_section->vma |
| 2350 | + s->output_offset) : 0; |
| 2351 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2352 | break; |
| 2353 | |
| 2354 | case DT_PLTRELSZ: |
| 2355 | s = elf_hash_table (info)->srelplt; |
| 2356 | if (s == NULL) |
| 2357 | dyn.d_un.d_val = 0; |
| 2358 | else |
| 2359 | dyn.d_un.d_val = s->size; |
| 2360 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2361 | break; |
| 2362 | } |
| 2363 | } |
| 2364 | |
| 2365 | /* Fill in the first entry in the procedure linkage table. */ |
| 2366 | if (splt->size > 0) |
| 2367 | { |
| 2368 | if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) |
| 2369 | { |
| 2370 | if (bfd_link_pic (info)) |
| 2371 | memcpy (splt->contents, elf_cris_pic_plt0_entry_v32, |
| 2372 | PLT_ENTRY_SIZE_V32); |
| 2373 | else |
| 2374 | { |
| 2375 | memcpy (splt->contents, elf_cris_plt0_entry_v32, |
| 2376 | PLT_ENTRY_SIZE_V32); |
| 2377 | bfd_put_32 (output_bfd, |
| 2378 | sgot->output_section->vma |
| 2379 | + sgot->output_offset + 4, |
| 2380 | splt->contents + 4); |
| 2381 | |
| 2382 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
| 2383 | = PLT_ENTRY_SIZE_V32; |
| 2384 | } |
| 2385 | } |
| 2386 | else |
| 2387 | { |
| 2388 | if (bfd_link_pic (info)) |
| 2389 | memcpy (splt->contents, elf_cris_pic_plt0_entry, |
| 2390 | PLT_ENTRY_SIZE); |
| 2391 | else |
| 2392 | { |
| 2393 | memcpy (splt->contents, elf_cris_plt0_entry, |
| 2394 | PLT_ENTRY_SIZE); |
| 2395 | bfd_put_32 (output_bfd, |
| 2396 | sgot->output_section->vma |
| 2397 | + sgot->output_offset + 4, |
| 2398 | splt->contents + 6); |
| 2399 | bfd_put_32 (output_bfd, |
| 2400 | sgot->output_section->vma |
| 2401 | + sgot->output_offset + 8, |
| 2402 | splt->contents + 14); |
| 2403 | |
| 2404 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
| 2405 | = PLT_ENTRY_SIZE; |
| 2406 | } |
| 2407 | } |
| 2408 | } |
| 2409 | } |
| 2410 | |
| 2411 | /* Fill in the first three entries in the global offset table. */ |
| 2412 | if (sgot->size > 0) |
| 2413 | { |
| 2414 | if (sdyn == NULL) |
| 2415 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 2416 | else |
| 2417 | bfd_put_32 (output_bfd, |
| 2418 | sdyn->output_section->vma + sdyn->output_offset, |
| 2419 | sgot->contents); |
| 2420 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 2421 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 2422 | } |
| 2423 | |
| 2424 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 2425 | |
| 2426 | return TRUE; |
| 2427 | } |
| 2428 | \f |
| 2429 | /* Return the section that should be marked against GC for a given |
| 2430 | relocation. */ |
| 2431 | |
| 2432 | static asection * |
| 2433 | cris_elf_gc_mark_hook (asection *sec, |
| 2434 | struct bfd_link_info *info, |
| 2435 | Elf_Internal_Rela *rel, |
| 2436 | struct elf_link_hash_entry *h, |
| 2437 | Elf_Internal_Sym *sym) |
| 2438 | { |
| 2439 | enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); |
| 2440 | if (h != NULL) |
| 2441 | switch (r_type) |
| 2442 | { |
| 2443 | case R_CRIS_GNU_VTINHERIT: |
| 2444 | case R_CRIS_GNU_VTENTRY: |
| 2445 | return NULL; |
| 2446 | |
| 2447 | default: |
| 2448 | break; |
| 2449 | } |
| 2450 | |
| 2451 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 2452 | } |
| 2453 | |
| 2454 | /* Update the got entry reference counts for the section being removed. */ |
| 2455 | |
| 2456 | static bfd_boolean |
| 2457 | cris_elf_gc_sweep_hook (bfd *abfd, |
| 2458 | struct bfd_link_info *info, |
| 2459 | asection *sec, |
| 2460 | const Elf_Internal_Rela *relocs) |
| 2461 | { |
| 2462 | struct elf_cris_link_hash_table * htab; |
| 2463 | Elf_Internal_Shdr *symtab_hdr; |
| 2464 | struct elf_link_hash_entry **sym_hashes; |
| 2465 | bfd_signed_vma *local_got_refcounts; |
| 2466 | const Elf_Internal_Rela *rel, *relend; |
| 2467 | bfd *dynobj; |
| 2468 | asection *sgot; |
| 2469 | asection *srelgot; |
| 2470 | |
| 2471 | if (bfd_link_relocatable (info)) |
| 2472 | return TRUE; |
| 2473 | |
| 2474 | dynobj = elf_hash_table (info)->dynobj; |
| 2475 | if (dynobj == NULL) |
| 2476 | return TRUE; |
| 2477 | |
| 2478 | htab = elf_cris_hash_table (info); |
| 2479 | if (htab == NULL) |
| 2480 | return FALSE; |
| 2481 | |
| 2482 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2483 | sym_hashes = elf_sym_hashes (abfd); |
| 2484 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2485 | |
| 2486 | sgot = htab->root.sgot; |
| 2487 | srelgot = htab->root.srelgot; |
| 2488 | |
| 2489 | relend = relocs + sec->reloc_count; |
| 2490 | for (rel = relocs; rel < relend; rel++) |
| 2491 | { |
| 2492 | unsigned long r_symndx; |
| 2493 | struct elf_link_hash_entry *h = NULL; |
| 2494 | bfd_signed_vma got_element_size = 4; |
| 2495 | bfd_signed_vma *specific_refcount = NULL; |
| 2496 | enum elf_cris_reloc_type r_type; |
| 2497 | |
| 2498 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2499 | if (r_symndx >= symtab_hdr->sh_info) |
| 2500 | { |
| 2501 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2502 | while (h->root.type == bfd_link_hash_indirect |
| 2503 | || h->root.type == bfd_link_hash_warning) |
| 2504 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2505 | } |
| 2506 | |
| 2507 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2508 | switch (r_type) |
| 2509 | { |
| 2510 | case R_CRIS_32_GOT: |
| 2511 | case R_CRIS_16_GOT: |
| 2512 | case R_CRIS_16_GOTPLT: |
| 2513 | case R_CRIS_32_GOTPLT: |
| 2514 | specific_refcount = h != NULL |
| 2515 | ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount |
| 2516 | : &local_got_refcounts[LGOT_REG_NDX (r_symndx)]; |
| 2517 | break; |
| 2518 | |
| 2519 | case R_CRIS_32_GD: |
| 2520 | case R_CRIS_32_GOT_GD: |
| 2521 | case R_CRIS_16_GOT_GD: |
| 2522 | got_element_size = 8; |
| 2523 | specific_refcount = h != NULL |
| 2524 | ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount |
| 2525 | : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)]; |
| 2526 | break; |
| 2527 | |
| 2528 | case R_CRIS_32_IE: |
| 2529 | case R_CRIS_16_GOT_TPREL: |
| 2530 | case R_CRIS_32_GOT_TPREL: |
| 2531 | specific_refcount = h != NULL |
| 2532 | ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount |
| 2533 | : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)]; |
| 2534 | break; |
| 2535 | |
| 2536 | default: |
| 2537 | break; |
| 2538 | } |
| 2539 | |
| 2540 | switch (r_type) |
| 2541 | { |
| 2542 | case R_CRIS_32_IE: |
| 2543 | case R_CRIS_32_GD: |
| 2544 | case R_CRIS_16_GOT_TPREL: |
| 2545 | case R_CRIS_32_GOT_TPREL: |
| 2546 | case R_CRIS_32_GOT_GD: |
| 2547 | case R_CRIS_16_GOT_GD: |
| 2548 | case R_CRIS_16_GOT: |
| 2549 | case R_CRIS_32_GOT: |
| 2550 | if (h != NULL) |
| 2551 | { |
| 2552 | /* If the counters are 0 when we got here, we've |
| 2553 | miscounted somehow somewhere, an internal error. */ |
| 2554 | BFD_ASSERT (h->got.refcount > 0); |
| 2555 | --h->got.refcount; |
| 2556 | |
| 2557 | BFD_ASSERT (*specific_refcount > 0); |
| 2558 | --*specific_refcount; |
| 2559 | if (*specific_refcount == 0) |
| 2560 | { |
| 2561 | /* We don't need the .got entry any more. */ |
| 2562 | sgot->size -= got_element_size; |
| 2563 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 2564 | } |
| 2565 | break; |
| 2566 | } |
| 2567 | |
| 2568 | local_got_reloc: |
| 2569 | if (local_got_refcounts != NULL) |
| 2570 | { |
| 2571 | /* If the counters are 0 when we got here, we've |
| 2572 | miscounted somehow somewhere, an internal error. */ |
| 2573 | BFD_ASSERT (local_got_refcounts[r_symndx] > 0); |
| 2574 | --local_got_refcounts[r_symndx]; |
| 2575 | |
| 2576 | BFD_ASSERT (*specific_refcount > 0); |
| 2577 | --*specific_refcount; |
| 2578 | if (*specific_refcount == 0) |
| 2579 | { |
| 2580 | /* We don't need the .got entry any more. */ |
| 2581 | sgot->size -= got_element_size; |
| 2582 | if (bfd_link_pic (info)) |
| 2583 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 2584 | } |
| 2585 | } |
| 2586 | break; |
| 2587 | |
| 2588 | case R_CRIS_16_GOTPLT: |
| 2589 | case R_CRIS_32_GOTPLT: |
| 2590 | /* For local symbols, treat these like GOT relocs. */ |
| 2591 | if (h == NULL) |
| 2592 | goto local_got_reloc; |
| 2593 | else |
| 2594 | /* For global symbols, adjust the reloc-specific refcount. */ |
| 2595 | elf_cris_hash_entry (h)->gotplt_refcount--; |
| 2596 | /* Fall through. */ |
| 2597 | |
| 2598 | case R_CRIS_32_PLT_GOTREL: |
| 2599 | /* FIXME: We don't garbage-collect away the .got section. */ |
| 2600 | if (local_got_refcounts != NULL) |
| 2601 | local_got_refcounts[-1]--; |
| 2602 | /* Fall through. */ |
| 2603 | |
| 2604 | case R_CRIS_8: |
| 2605 | case R_CRIS_16: |
| 2606 | case R_CRIS_32: |
| 2607 | case R_CRIS_8_PCREL: |
| 2608 | case R_CRIS_16_PCREL: |
| 2609 | case R_CRIS_32_PCREL: |
| 2610 | case R_CRIS_32_PLT_PCREL: |
| 2611 | /* Negate the increment we did in cris_elf_check_relocs. */ |
| 2612 | if (h != NULL) |
| 2613 | { |
| 2614 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 2615 | && h->plt.refcount > 0) |
| 2616 | --h->plt.refcount; |
| 2617 | } |
| 2618 | break; |
| 2619 | |
| 2620 | case R_CRIS_32_DTPREL: |
| 2621 | /* This'd be a .dtpreld entry in e.g. debug info. */ |
| 2622 | if ((sec->flags & SEC_ALLOC) == 0) |
| 2623 | break; |
| 2624 | /* Fall through. */ |
| 2625 | case R_CRIS_16_DTPREL: |
| 2626 | htab->dtpmod_refcount--; |
| 2627 | if (htab->dtpmod_refcount == 0) |
| 2628 | htab->next_gotplt_entry -= 8; |
| 2629 | BFD_ASSERT (local_got_refcounts != NULL); |
| 2630 | local_got_refcounts[-1]--; |
| 2631 | break; |
| 2632 | |
| 2633 | default: |
| 2634 | break; |
| 2635 | } |
| 2636 | } |
| 2637 | |
| 2638 | return TRUE; |
| 2639 | } |
| 2640 | |
| 2641 | /* The elf_backend_plt_sym_val hook function. */ |
| 2642 | |
| 2643 | static bfd_vma |
| 2644 | cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt, |
| 2645 | const arelent *rel) |
| 2646 | { |
| 2647 | bfd_size_type plt_entry_size; |
| 2648 | bfd_size_type pltoffs; |
| 2649 | bfd *abfd = plt->owner; |
| 2650 | |
| 2651 | /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */ |
| 2652 | bfd_size_type plt_entry_got_offset = 2; |
| 2653 | bfd_size_type plt_sec_size; |
| 2654 | bfd_size_type got_vma_for_dyn; |
| 2655 | asection *got; |
| 2656 | |
| 2657 | /* FIXME: the .got section should be readily available also when |
| 2658 | we're not linking. */ |
| 2659 | if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL) |
| 2660 | return (bfd_vma) -1; |
| 2661 | |
| 2662 | plt_sec_size = bfd_section_size (plt->owner, plt); |
| 2663 | plt_entry_size |
| 2664 | = (bfd_get_mach (abfd) == bfd_mach_cris_v32 |
| 2665 | ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); |
| 2666 | |
| 2667 | /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */ |
| 2668 | got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma; |
| 2669 | |
| 2670 | /* Because we can have merged GOT entries; a single .got entry for |
| 2671 | both GOT and the PLT part of the GOT (.got.plt), the index of the |
| 2672 | reloc in .rela.plt is not the same as the index in the PLT. |
| 2673 | Instead, we have to hunt down the GOT offset in the PLT that |
| 2674 | corresponds to that of this reloc. Unfortunately, we will only |
| 2675 | be called for the .rela.plt relocs, so we'll miss synthetic |
| 2676 | symbols for .plt entries with merged GOT entries. (FIXME: |
| 2677 | fixable by providing our own bfd_elf32_get_synthetic_symtab. |
| 2678 | Doesn't seem worthwile at time of this writing.) FIXME: we've |
| 2679 | gone from O(1) to O(N) (N number of PLT entries) for finding each |
| 2680 | PLT address. Shouldn't matter in practice though. */ |
| 2681 | |
| 2682 | for (pltoffs = plt_entry_size; |
| 2683 | pltoffs < plt_sec_size; |
| 2684 | pltoffs += plt_entry_size) |
| 2685 | { |
| 2686 | bfd_size_type got_offset; |
| 2687 | bfd_byte gotoffs_raw[4]; |
| 2688 | |
| 2689 | if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw, |
| 2690 | pltoffs + plt_entry_got_offset, |
| 2691 | sizeof (gotoffs_raw))) |
| 2692 | return (bfd_vma) -1; |
| 2693 | |
| 2694 | got_offset = bfd_get_32 (abfd, gotoffs_raw); |
| 2695 | if (got_offset + got_vma_for_dyn == rel->address) |
| 2696 | return plt->vma + pltoffs; |
| 2697 | } |
| 2698 | |
| 2699 | /* While it's tempting to BFD_ASSERT that we shouldn't get here, |
| 2700 | that'd not be graceful behavior for invalid input. */ |
| 2701 | return (bfd_vma) -1; |
| 2702 | } |
| 2703 | |
| 2704 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
| 2705 | entry but we found we will not create any. Called when we find we will |
| 2706 | not have any PLT for this symbol, by for example |
| 2707 | elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link, |
| 2708 | or elf_cris_size_dynamic_sections if no dynamic sections will be |
| 2709 | created (we're only linking static objects). */ |
| 2710 | |
| 2711 | static bfd_boolean |
| 2712 | elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p) |
| 2713 | { |
| 2714 | struct bfd_link_info *info = (struct bfd_link_info *) p; |
| 2715 | |
| 2716 | /* A GOTPLT reloc, when activated, is supposed to be included into |
| 2717 | the PLT refcount, when the symbol isn't set-or-forced local. */ |
| 2718 | BFD_ASSERT (h->gotplt_refcount == 0 |
| 2719 | || h->root.plt.refcount == -1 |
| 2720 | || h->gotplt_refcount <= h->root.plt.refcount); |
| 2721 | |
| 2722 | /* If nobody wanted a GOTPLT with this symbol, we're done. */ |
| 2723 | if (h->gotplt_refcount <= 0) |
| 2724 | return TRUE; |
| 2725 | |
| 2726 | if (h->reg_got_refcount > 0) |
| 2727 | { |
| 2728 | /* There's a GOT entry for this symbol. Just adjust the refcounts. |
| 2729 | Probably not necessary at this stage, but keeping them accurate |
| 2730 | helps avoiding surprises later. */ |
| 2731 | h->root.got.refcount += h->gotplt_refcount; |
| 2732 | h->reg_got_refcount += h->gotplt_refcount; |
| 2733 | h->gotplt_refcount = 0; |
| 2734 | } |
| 2735 | else |
| 2736 | { |
| 2737 | /* No GOT entry for this symbol. We need to create one. */ |
| 2738 | asection *sgot; |
| 2739 | asection *srelgot; |
| 2740 | |
| 2741 | sgot = elf_hash_table (info)->sgot; |
| 2742 | srelgot = elf_hash_table (info)->srelgot; |
| 2743 | |
| 2744 | /* Put accurate refcounts there. */ |
| 2745 | BFD_ASSERT (h->root.got.refcount >= 0); |
| 2746 | h->root.got.refcount += h->gotplt_refcount; |
| 2747 | h->reg_got_refcount = h->gotplt_refcount; |
| 2748 | |
| 2749 | h->gotplt_refcount = 0; |
| 2750 | |
| 2751 | /* We always have a .got and a .rela.got section if there were |
| 2752 | GOTPLT relocs in input. */ |
| 2753 | BFD_ASSERT (sgot != NULL && srelgot != NULL); |
| 2754 | |
| 2755 | /* Allocate space in the .got section. */ |
| 2756 | sgot->size += 4; |
| 2757 | |
| 2758 | /* Allocate relocation space. */ |
| 2759 | srelgot->size += sizeof (Elf32_External_Rela); |
| 2760 | } |
| 2761 | |
| 2762 | return TRUE; |
| 2763 | } |
| 2764 | |
| 2765 | /* Try to fold PLT entries with GOT entries. There are two cases when we |
| 2766 | want to do this: |
| 2767 | |
| 2768 | - When all PLT references are GOTPLT references, and there are GOT |
| 2769 | references, and this is not the executable. We don't have to |
| 2770 | generate a PLT at all. |
| 2771 | |
| 2772 | - When there are both (ordinary) PLT references and GOT references, |
| 2773 | and this isn't the executable. |
| 2774 | We want to make the PLT reference use the ordinary GOT entry rather |
| 2775 | than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry, |
| 2776 | since the GOT entry will have to be resolved at startup anyway. |
| 2777 | |
| 2778 | Though the latter case is handled when room for the PLT is allocated, |
| 2779 | not here. |
| 2780 | |
| 2781 | By folding into the GOT, we may need a round-trip to a PLT in the |
| 2782 | executable for calls, a loss in performance. Still, losing a |
| 2783 | reloc is a win in size and at least in start-up time. |
| 2784 | |
| 2785 | Note that this function is called before symbols are forced local by |
| 2786 | version scripts. The differing cases are handled by |
| 2787 | elf_cris_hide_symbol. */ |
| 2788 | |
| 2789 | static bfd_boolean |
| 2790 | elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p) |
| 2791 | { |
| 2792 | struct bfd_link_info *info = (struct bfd_link_info *) p; |
| 2793 | |
| 2794 | /* If there are no GOT references for this symbol, we can't fold any |
| 2795 | other reference so there's nothing to do. Likewise if there are no |
| 2796 | PLT references; GOTPLT references included. */ |
| 2797 | if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0) |
| 2798 | return TRUE; |
| 2799 | |
| 2800 | /* GOTPLT relocs are supposed to be included into the PLT refcount. */ |
| 2801 | BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount); |
| 2802 | |
| 2803 | if (h->gotplt_refcount == h->root.plt.refcount) |
| 2804 | { |
| 2805 | /* The only PLT references are GOTPLT references, and there are GOT |
| 2806 | references. Convert PLT to GOT references. */ |
| 2807 | if (! elf_cris_adjust_gotplt_to_got (h, info)) |
| 2808 | return FALSE; |
| 2809 | |
| 2810 | /* Clear the PLT references, so no PLT will be created. */ |
| 2811 | h->root.plt.offset = (bfd_vma) -1; |
| 2812 | } |
| 2813 | |
| 2814 | return TRUE; |
| 2815 | } |
| 2816 | |
| 2817 | /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc |
| 2818 | to use a GOT entry (and create one) rather than requiring a GOTPLT |
| 2819 | entry. */ |
| 2820 | |
| 2821 | static void |
| 2822 | elf_cris_hide_symbol (struct bfd_link_info *info, |
| 2823 | struct elf_link_hash_entry *h, |
| 2824 | bfd_boolean force_local) |
| 2825 | { |
| 2826 | elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info); |
| 2827 | |
| 2828 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| 2829 | } |
| 2830 | |
| 2831 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2832 | regular object. The current definition is in some section of the |
| 2833 | dynamic object, but we're not including those sections. We have to |
| 2834 | change the definition to something the rest of the link can |
| 2835 | understand. */ |
| 2836 | |
| 2837 | static bfd_boolean |
| 2838 | elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 2839 | struct elf_link_hash_entry *h) |
| 2840 | { |
| 2841 | struct elf_cris_link_hash_table * htab; |
| 2842 | bfd *dynobj; |
| 2843 | asection *s; |
| 2844 | asection *srel; |
| 2845 | bfd_size_type plt_entry_size; |
| 2846 | |
| 2847 | htab = elf_cris_hash_table (info); |
| 2848 | if (htab == NULL) |
| 2849 | return FALSE; |
| 2850 | |
| 2851 | dynobj = htab->root.dynobj; |
| 2852 | |
| 2853 | /* Make sure we know what is going on here. */ |
| 2854 | BFD_ASSERT (dynobj != NULL |
| 2855 | && (h->needs_plt |
| 2856 | || h->u.weakdef != NULL |
| 2857 | || (h->def_dynamic |
| 2858 | && h->ref_regular |
| 2859 | && !h->def_regular))); |
| 2860 | |
| 2861 | plt_entry_size |
| 2862 | = (bfd_get_mach (dynobj) == bfd_mach_cris_v32 |
| 2863 | ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); |
| 2864 | |
| 2865 | /* If this is a function, put it in the procedure linkage table. We |
| 2866 | will fill in the contents of the procedure linkage table later, |
| 2867 | when we know the address of the .got section. */ |
| 2868 | if (h->type == STT_FUNC |
| 2869 | || h->needs_plt) |
| 2870 | { |
| 2871 | /* If we link a program (not a DSO), we'll get rid of unnecessary |
| 2872 | PLT entries; we point to the actual symbols -- even for pic |
| 2873 | relocs, because a program built with -fpic should have the same |
| 2874 | result as one built without -fpic, specifically considering weak |
| 2875 | symbols. |
| 2876 | FIXME: m68k and i386 differ here, for unclear reasons. */ |
| 2877 | if (! bfd_link_pic (info) |
| 2878 | && !h->def_dynamic) |
| 2879 | { |
| 2880 | /* This case can occur if we saw a PLT reloc in an input file, |
| 2881 | but the symbol was not defined by a dynamic object. In such |
| 2882 | a case, we don't actually need to build a procedure linkage |
| 2883 | table, and we can just do an absolute or PC reloc instead, or |
| 2884 | change a .got.plt index to a .got index for GOTPLT relocs. */ |
| 2885 | BFD_ASSERT (h->needs_plt); |
| 2886 | h->needs_plt = 0; |
| 2887 | h->plt.offset = (bfd_vma) -1; |
| 2888 | return |
| 2889 | elf_cris_adjust_gotplt_to_got ((struct |
| 2890 | elf_cris_link_hash_entry *) h, |
| 2891 | info); |
| 2892 | } |
| 2893 | |
| 2894 | /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT; |
| 2895 | where a pointer-equivalent symbol was unimportant (i.e. more |
| 2896 | like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid |
| 2897 | of the PLT. We can't for the executable, because the GOT |
| 2898 | entries will point to the PLT there (and be constant). */ |
| 2899 | if (bfd_link_pic (info) |
| 2900 | && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*) |
| 2901 | h, info)) |
| 2902 | return FALSE; |
| 2903 | |
| 2904 | /* GC or folding may have rendered this entry unused. */ |
| 2905 | if (h->plt.refcount <= 0) |
| 2906 | { |
| 2907 | h->needs_plt = 0; |
| 2908 | h->plt.offset = (bfd_vma) -1; |
| 2909 | return TRUE; |
| 2910 | } |
| 2911 | |
| 2912 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2913 | if (h->dynindx == -1) |
| 2914 | { |
| 2915 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2916 | return FALSE; |
| 2917 | } |
| 2918 | |
| 2919 | s = htab->root.splt; |
| 2920 | BFD_ASSERT (s != NULL); |
| 2921 | |
| 2922 | /* If this is the first .plt entry, make room for the special |
| 2923 | first entry. */ |
| 2924 | if (s->size == 0) |
| 2925 | s->size += plt_entry_size; |
| 2926 | |
| 2927 | /* If this symbol is not defined in a regular file, and we are |
| 2928 | not generating a shared library, then set the symbol to this |
| 2929 | location in the .plt. */ |
| 2930 | if (!bfd_link_pic (info) |
| 2931 | && !h->def_regular) |
| 2932 | { |
| 2933 | h->root.u.def.section = s; |
| 2934 | h->root.u.def.value = s->size; |
| 2935 | } |
| 2936 | |
| 2937 | /* If there's already a GOT entry, use that, not a .got.plt. A |
| 2938 | GOT field still has a reference count when we get here; it's |
| 2939 | not yet changed to an offset. We can't do this for an |
| 2940 | executable, because then the reloc associated with the PLT |
| 2941 | would get a non-PLT reloc pointing to the PLT. FIXME: Move |
| 2942 | this to elf_cris_try_fold_plt_to_got. */ |
| 2943 | if (bfd_link_pic (info) && h->got.refcount > 0) |
| 2944 | { |
| 2945 | h->got.refcount += h->plt.refcount; |
| 2946 | |
| 2947 | /* Mark the PLT offset to use the GOT entry by setting the low |
| 2948 | bit in the plt offset; it is always a multiple of |
| 2949 | plt_entry_size (which is at least a multiple of 2). */ |
| 2950 | BFD_ASSERT ((s->size % plt_entry_size) == 0); |
| 2951 | |
| 2952 | /* Change the PLT refcount to an offset. */ |
| 2953 | h->plt.offset = s->size; |
| 2954 | |
| 2955 | /* By not setting gotplt_offset (i.e. it remains at 0), we signal |
| 2956 | that the got entry should be used instead. */ |
| 2957 | BFD_ASSERT (((struct elf_cris_link_hash_entry *) |
| 2958 | h)->gotplt_offset == 0); |
| 2959 | |
| 2960 | /* Make room for this entry. */ |
| 2961 | s->size += plt_entry_size; |
| 2962 | |
| 2963 | return TRUE; |
| 2964 | } |
| 2965 | |
| 2966 | /* No GOT reference for this symbol; prepare for an ordinary PLT. */ |
| 2967 | h->plt.offset = s->size; |
| 2968 | |
| 2969 | /* Make room for this entry. */ |
| 2970 | s->size += plt_entry_size; |
| 2971 | |
| 2972 | /* We also need to make an entry in the .got.plt section, which |
| 2973 | will be placed in the .got section by the linker script. */ |
| 2974 | ((struct elf_cris_link_hash_entry *) h)->gotplt_offset |
| 2975 | = htab->next_gotplt_entry; |
| 2976 | htab->next_gotplt_entry += 4; |
| 2977 | |
| 2978 | s = htab->root.sgotplt; |
| 2979 | BFD_ASSERT (s != NULL); |
| 2980 | s->size += 4; |
| 2981 | |
| 2982 | /* We also need to make an entry in the .rela.plt section. */ |
| 2983 | |
| 2984 | s = htab->root.srelplt; |
| 2985 | BFD_ASSERT (s != NULL); |
| 2986 | s->size += sizeof (Elf32_External_Rela); |
| 2987 | |
| 2988 | return TRUE; |
| 2989 | } |
| 2990 | |
| 2991 | /* Reinitialize the plt offset now that it is not used as a reference |
| 2992 | count any more. */ |
| 2993 | h->plt.offset = (bfd_vma) -1; |
| 2994 | |
| 2995 | /* If this is a weak symbol, and there is a real definition, the |
| 2996 | processor independent code will have arranged for us to see the |
| 2997 | real definition first, and we can just use the same value. */ |
| 2998 | if (h->u.weakdef != NULL) |
| 2999 | { |
| 3000 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 3001 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 3002 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 3003 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 3004 | return TRUE; |
| 3005 | } |
| 3006 | |
| 3007 | /* This is a reference to a symbol defined by a dynamic object which |
| 3008 | is not a function. */ |
| 3009 | |
| 3010 | /* If we are creating a shared library, we must presume that the |
| 3011 | only references to the symbol are via the global offset table. |
| 3012 | For such cases we need not do anything here; the relocations will |
| 3013 | be handled correctly by relocate_section. */ |
| 3014 | if (bfd_link_pic (info)) |
| 3015 | return TRUE; |
| 3016 | |
| 3017 | /* If there are no references to this symbol that do not use the |
| 3018 | GOT, we don't need to generate a copy reloc. */ |
| 3019 | if (!h->non_got_ref) |
| 3020 | return TRUE; |
| 3021 | |
| 3022 | /* We must allocate the symbol in our .dynbss section, which will |
| 3023 | become part of the .bss section of the executable. There will be |
| 3024 | an entry for this symbol in the .dynsym section. The dynamic |
| 3025 | object will contain position independent code, so all references |
| 3026 | from the dynamic object to this symbol will go through the global |
| 3027 | offset table. The dynamic linker will use the .dynsym entry to |
| 3028 | determine the address it must put in the global offset table, so |
| 3029 | both the dynamic object and the regular object will refer to the |
| 3030 | same memory location for the variable. */ |
| 3031 | |
| 3032 | /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to |
| 3033 | copy the initial value out of the dynamic object and into the |
| 3034 | runtime process image. We need to remember the offset into the |
| 3035 | .rela.bss section we are going to use. */ |
| 3036 | |
| 3037 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 3038 | { |
| 3039 | s = htab->root.sdynrelro; |
| 3040 | srel = htab->root.sreldynrelro; |
| 3041 | } |
| 3042 | else |
| 3043 | { |
| 3044 | s = htab->root.sdynbss; |
| 3045 | srel = htab->root.srelbss; |
| 3046 | } |
| 3047 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 3048 | { |
| 3049 | BFD_ASSERT (srel != NULL); |
| 3050 | srel->size += sizeof (Elf32_External_Rela); |
| 3051 | h->needs_copy = 1; |
| 3052 | } |
| 3053 | |
| 3054 | BFD_ASSERT (s != NULL); |
| 3055 | |
| 3056 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 3057 | } |
| 3058 | |
| 3059 | /* Adjust our "subclass" elements for an indirect symbol. */ |
| 3060 | |
| 3061 | static void |
| 3062 | elf_cris_copy_indirect_symbol (struct bfd_link_info *info, |
| 3063 | struct elf_link_hash_entry *dir, |
| 3064 | struct elf_link_hash_entry *ind) |
| 3065 | { |
| 3066 | struct elf_cris_link_hash_entry *edir, *eind; |
| 3067 | |
| 3068 | edir = (struct elf_cris_link_hash_entry *) dir; |
| 3069 | eind = (struct elf_cris_link_hash_entry *) ind; |
| 3070 | |
| 3071 | /* Only indirect symbols are replaced; we're not interested in |
| 3072 | updating any of EIND's fields for other symbols. */ |
| 3073 | if (eind->root.root.type != bfd_link_hash_indirect) |
| 3074 | { |
| 3075 | /* Still, we need to copy flags for e.g. weak definitions. */ |
| 3076 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 3077 | return; |
| 3078 | } |
| 3079 | |
| 3080 | BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0); |
| 3081 | |
| 3082 | #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z |
| 3083 | #define XMOVE(F) XMOVOPZ (F, +=, 0) |
| 3084 | if (eind->pcrel_relocs_copied != NULL) |
| 3085 | { |
| 3086 | if (edir->pcrel_relocs_copied != NULL) |
| 3087 | { |
| 3088 | struct elf_cris_pcrel_relocs_copied **pp; |
| 3089 | struct elf_cris_pcrel_relocs_copied *p; |
| 3090 | |
| 3091 | /* Add reloc counts against the indirect sym to the direct sym |
| 3092 | list. Merge any entries against the same section. */ |
| 3093 | for (pp = &eind->pcrel_relocs_copied; *pp != NULL;) |
| 3094 | { |
| 3095 | struct elf_cris_pcrel_relocs_copied *q; |
| 3096 | p = *pp; |
| 3097 | for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next) |
| 3098 | if (q->section == p->section) |
| 3099 | { |
| 3100 | q->count += p->count; |
| 3101 | *pp = p->next; |
| 3102 | break; |
| 3103 | } |
| 3104 | if (q == NULL) |
| 3105 | pp = &p->next; |
| 3106 | } |
| 3107 | *pp = edir->pcrel_relocs_copied; |
| 3108 | } |
| 3109 | XMOVOPZ (pcrel_relocs_copied, =, NULL); |
| 3110 | } |
| 3111 | XMOVE (gotplt_refcount); |
| 3112 | XMOVE (gotplt_offset); |
| 3113 | XMOVE (reg_got_refcount); |
| 3114 | XMOVE (tprel_refcount); |
| 3115 | XMOVE (dtp_refcount); |
| 3116 | #undef XMOVE |
| 3117 | #undef XMOVOPZ |
| 3118 | |
| 3119 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 3120 | } |
| 3121 | |
| 3122 | /* Look through the relocs for a section during the first phase. */ |
| 3123 | |
| 3124 | static bfd_boolean |
| 3125 | cris_elf_check_relocs (bfd *abfd, |
| 3126 | struct bfd_link_info *info, |
| 3127 | asection *sec, |
| 3128 | const Elf_Internal_Rela *relocs) |
| 3129 | { |
| 3130 | struct elf_cris_link_hash_table * htab; |
| 3131 | bfd *dynobj; |
| 3132 | Elf_Internal_Shdr *symtab_hdr; |
| 3133 | struct elf_link_hash_entry **sym_hashes; |
| 3134 | bfd_signed_vma *local_got_refcounts; |
| 3135 | const Elf_Internal_Rela *rel; |
| 3136 | const Elf_Internal_Rela *rel_end; |
| 3137 | asection *sgot; |
| 3138 | asection *srelgot; |
| 3139 | asection *sreloc; |
| 3140 | |
| 3141 | if (bfd_link_relocatable (info)) |
| 3142 | return TRUE; |
| 3143 | |
| 3144 | htab = elf_cris_hash_table (info); |
| 3145 | if (htab == NULL) |
| 3146 | return FALSE; |
| 3147 | |
| 3148 | dynobj = elf_hash_table (info)->dynobj; |
| 3149 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3150 | sym_hashes = elf_sym_hashes (abfd); |
| 3151 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3152 | |
| 3153 | sgot = NULL; |
| 3154 | srelgot = NULL; |
| 3155 | sreloc = NULL; |
| 3156 | |
| 3157 | rel_end = relocs + sec->reloc_count; |
| 3158 | for (rel = relocs; rel < rel_end; rel++) |
| 3159 | { |
| 3160 | struct elf_link_hash_entry *h; |
| 3161 | unsigned long r_symndx; |
| 3162 | enum elf_cris_reloc_type r_type; |
| 3163 | bfd_signed_vma got_element_size = 4; |
| 3164 | unsigned long r_symndx_lgot = INT_MAX; |
| 3165 | |
| 3166 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3167 | if (r_symndx < symtab_hdr->sh_info) |
| 3168 | { |
| 3169 | h = NULL; |
| 3170 | r_symndx_lgot = LGOT_REG_NDX (r_symndx); |
| 3171 | } |
| 3172 | else |
| 3173 | { |
| 3174 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3175 | while (h->root.type == bfd_link_hash_indirect |
| 3176 | || h->root.type == bfd_link_hash_warning) |
| 3177 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3178 | |
| 3179 | /* PR15323, ref flags aren't set for references in the same |
| 3180 | object. */ |
| 3181 | h->root.non_ir_ref_regular = 1; |
| 3182 | } |
| 3183 | |
| 3184 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3185 | |
| 3186 | /* Some relocs require linker-created sections; we need to hang them |
| 3187 | on the first input bfd we found that contained dynamic relocs. */ |
| 3188 | switch (r_type) |
| 3189 | { |
| 3190 | case R_CRIS_32_DTPREL: |
| 3191 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3192 | /* This'd be a .dtpreld entry in e.g. debug info. We have |
| 3193 | several different switch statements below, but none of |
| 3194 | that is needed; we need no preparations for resolving |
| 3195 | R_CRIS_32_DTPREL into a non-allocated section (debug |
| 3196 | info), so let's just move on to the next |
| 3197 | relocation. */ |
| 3198 | continue; |
| 3199 | /* Fall through. */ |
| 3200 | case R_CRIS_16_DTPREL: |
| 3201 | /* The first .got.plt entry is right after the R_CRIS_DTPMOD |
| 3202 | entry at index 3. */ |
| 3203 | if (htab->dtpmod_refcount == 0) |
| 3204 | htab->next_gotplt_entry += 8; |
| 3205 | |
| 3206 | htab->dtpmod_refcount++; |
| 3207 | /* Fall through. */ |
| 3208 | |
| 3209 | case R_CRIS_32_IE: |
| 3210 | case R_CRIS_32_GD: |
| 3211 | case R_CRIS_16_GOT_GD: |
| 3212 | case R_CRIS_32_GOT_GD: |
| 3213 | case R_CRIS_32_GOT_TPREL: |
| 3214 | case R_CRIS_16_GOT_TPREL: |
| 3215 | case R_CRIS_16_GOT: |
| 3216 | case R_CRIS_32_GOT: |
| 3217 | case R_CRIS_32_GOTREL: |
| 3218 | case R_CRIS_32_PLT_GOTREL: |
| 3219 | case R_CRIS_32_PLT_PCREL: |
| 3220 | case R_CRIS_16_GOTPLT: |
| 3221 | case R_CRIS_32_GOTPLT: |
| 3222 | if (dynobj == NULL) |
| 3223 | { |
| 3224 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 3225 | |
| 3226 | /* We could handle this if we can get a handle on the |
| 3227 | output bfd in elf_cris_adjust_dynamic_symbol. Failing |
| 3228 | that, we must insist on dynobj being a specific mach. */ |
| 3229 | if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32) |
| 3230 | { |
| 3231 | _bfd_error_handler |
| 3232 | /* xgettext:c-format */ |
| 3233 | (_("%B, section %A:\n v10/v32 compatible object %s" |
| 3234 | " must not contain a PIC relocation"), |
| 3235 | abfd, sec); |
| 3236 | return FALSE; |
| 3237 | } |
| 3238 | } |
| 3239 | |
| 3240 | if (sgot == NULL) |
| 3241 | { |
| 3242 | /* We may have a dynobj but no .got section, if machine- |
| 3243 | independent parts of the linker found a reason to create |
| 3244 | a dynobj. We want to create the .got section now, so we |
| 3245 | can assume it's always present whenever there's a dynobj. |
| 3246 | It's ok to call this function more than once. */ |
| 3247 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 3248 | return FALSE; |
| 3249 | |
| 3250 | sgot = elf_hash_table (info)->sgot; |
| 3251 | srelgot = elf_hash_table (info)->srelgot; |
| 3252 | } |
| 3253 | |
| 3254 | if (local_got_refcounts == NULL) |
| 3255 | { |
| 3256 | bfd_size_type amt; |
| 3257 | |
| 3258 | /* We use index local_got_refcounts[-1] to count all |
| 3259 | GOT-relative relocations that do not have explicit |
| 3260 | GOT entries. */ |
| 3261 | amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1; |
| 3262 | amt *= sizeof (bfd_signed_vma); |
| 3263 | local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt)); |
| 3264 | if (local_got_refcounts == NULL) |
| 3265 | return FALSE; |
| 3266 | |
| 3267 | local_got_refcounts++; |
| 3268 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 3269 | } |
| 3270 | break; |
| 3271 | |
| 3272 | default: |
| 3273 | break; |
| 3274 | } |
| 3275 | |
| 3276 | /* Warn and error for invalid input. */ |
| 3277 | switch (r_type) |
| 3278 | { |
| 3279 | case R_CRIS_32_IE: |
| 3280 | case R_CRIS_32_TPREL: |
| 3281 | case R_CRIS_16_TPREL: |
| 3282 | case R_CRIS_32_GD: |
| 3283 | if (bfd_link_pic (info)) |
| 3284 | { |
| 3285 | _bfd_error_handler |
| 3286 | /* xgettext:c-format */ |
| 3287 | (_("%B, section %A:\n relocation %s not valid" |
| 3288 | " in a shared object;" |
| 3289 | " typically an option mixup, recompile with -fPIC"), |
| 3290 | abfd, |
| 3291 | sec, |
| 3292 | cris_elf_howto_table[r_type].name); |
| 3293 | /* Don't return FALSE here; we want messages for all of |
| 3294 | these and the error behavior is ungraceful |
| 3295 | anyway. */ |
| 3296 | } |
| 3297 | default: |
| 3298 | break; |
| 3299 | } |
| 3300 | |
| 3301 | switch (r_type) |
| 3302 | { |
| 3303 | case R_CRIS_32_GD: |
| 3304 | case R_CRIS_16_GOT_GD: |
| 3305 | case R_CRIS_32_GOT_GD: |
| 3306 | /* These are requests for tls_index entries, run-time R_CRIS_DTP. */ |
| 3307 | got_element_size = 8; |
| 3308 | r_symndx_lgot = LGOT_DTP_NDX (r_symndx); |
| 3309 | break; |
| 3310 | |
| 3311 | case R_CRIS_16_DTPREL: |
| 3312 | case R_CRIS_32_DTPREL: |
| 3313 | /* These two just request for the constant-index |
| 3314 | module-local tls_index-sized GOT entry, which we add |
| 3315 | elsewhere. */ |
| 3316 | break; |
| 3317 | |
| 3318 | case R_CRIS_32_IE: |
| 3319 | case R_CRIS_32_GOT_TPREL: |
| 3320 | case R_CRIS_16_GOT_TPREL: |
| 3321 | r_symndx_lgot = LGOT_TPREL_NDX (r_symndx); |
| 3322 | |
| 3323 | /* Those relocs also require that a DSO is of type |
| 3324 | Initial Exec. Like other targets, we don't reset this |
| 3325 | flag even if the relocs are GC:ed away. */ |
| 3326 | if (bfd_link_pic (info)) |
| 3327 | info->flags |= DF_STATIC_TLS; |
| 3328 | break; |
| 3329 | |
| 3330 | /* Let's list the other assembler-generated TLS-relocs too, |
| 3331 | just to show that they're not forgotten. */ |
| 3332 | case R_CRIS_16_TPREL: |
| 3333 | case R_CRIS_32_TPREL: |
| 3334 | default: |
| 3335 | break; |
| 3336 | } |
| 3337 | |
| 3338 | switch (r_type) |
| 3339 | { |
| 3340 | case R_CRIS_16_GOTPLT: |
| 3341 | case R_CRIS_32_GOTPLT: |
| 3342 | /* Mark that we need a GOT entry if the PLT entry (and its GOT |
| 3343 | entry) is eliminated. We can only do this for a non-local |
| 3344 | symbol. */ |
| 3345 | if (h != NULL) |
| 3346 | { |
| 3347 | elf_cris_hash_entry (h)->gotplt_refcount++; |
| 3348 | goto handle_gotplt_reloc; |
| 3349 | } |
| 3350 | /* If h is NULL then this is a local symbol, and we must make a |
| 3351 | GOT entry for it, so handle it like a GOT reloc. */ |
| 3352 | /* Fall through. */ |
| 3353 | |
| 3354 | case R_CRIS_32_IE: |
| 3355 | case R_CRIS_32_GD: |
| 3356 | case R_CRIS_16_GOT_GD: |
| 3357 | case R_CRIS_32_GOT_GD: |
| 3358 | case R_CRIS_32_GOT_TPREL: |
| 3359 | case R_CRIS_16_GOT_TPREL: |
| 3360 | case R_CRIS_16_GOT: |
| 3361 | case R_CRIS_32_GOT: |
| 3362 | /* This symbol requires a global offset table entry. */ |
| 3363 | if (h != NULL) |
| 3364 | { |
| 3365 | if (h->got.refcount == 0) |
| 3366 | { |
| 3367 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 3368 | if (h->dynindx == -1) |
| 3369 | { |
| 3370 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3371 | return FALSE; |
| 3372 | } |
| 3373 | } |
| 3374 | |
| 3375 | /* Update the sum of reloc counts for this symbol. */ |
| 3376 | h->got.refcount++; |
| 3377 | |
| 3378 | switch (r_type) |
| 3379 | { |
| 3380 | case R_CRIS_16_GOT: |
| 3381 | case R_CRIS_32_GOT: |
| 3382 | if (elf_cris_hash_entry (h)->reg_got_refcount == 0) |
| 3383 | { |
| 3384 | /* Allocate space in the .got section. */ |
| 3385 | sgot->size += got_element_size; |
| 3386 | /* Allocate relocation space. */ |
| 3387 | srelgot->size += sizeof (Elf32_External_Rela); |
| 3388 | } |
| 3389 | elf_cris_hash_entry (h)->reg_got_refcount++; |
| 3390 | break; |
| 3391 | |
| 3392 | case R_CRIS_32_GD: |
| 3393 | case R_CRIS_16_GOT_GD: |
| 3394 | case R_CRIS_32_GOT_GD: |
| 3395 | if (elf_cris_hash_entry (h)->dtp_refcount == 0) |
| 3396 | { |
| 3397 | /* Allocate space in the .got section. */ |
| 3398 | sgot->size += got_element_size; |
| 3399 | /* Allocate relocation space. */ |
| 3400 | srelgot->size += sizeof (Elf32_External_Rela); |
| 3401 | } |
| 3402 | elf_cris_hash_entry (h)->dtp_refcount++; |
| 3403 | break; |
| 3404 | |
| 3405 | case R_CRIS_32_IE: |
| 3406 | case R_CRIS_32_GOT_TPREL: |
| 3407 | case R_CRIS_16_GOT_TPREL: |
| 3408 | if (elf_cris_hash_entry (h)->tprel_refcount == 0) |
| 3409 | { |
| 3410 | /* Allocate space in the .got section. */ |
| 3411 | sgot->size += got_element_size; |
| 3412 | /* Allocate relocation space. */ |
| 3413 | srelgot->size += sizeof (Elf32_External_Rela); |
| 3414 | } |
| 3415 | elf_cris_hash_entry (h)->tprel_refcount++; |
| 3416 | break; |
| 3417 | |
| 3418 | default: |
| 3419 | BFD_FAIL (); |
| 3420 | break; |
| 3421 | } |
| 3422 | } |
| 3423 | else |
| 3424 | { |
| 3425 | /* This is a global offset table entry for a local symbol. */ |
| 3426 | if (local_got_refcounts[r_symndx_lgot] == 0) |
| 3427 | { |
| 3428 | sgot->size += got_element_size; |
| 3429 | if (bfd_link_pic (info)) |
| 3430 | { |
| 3431 | /* If we are generating a shared object, we need |
| 3432 | to output a R_CRIS_RELATIVE reloc so that the |
| 3433 | dynamic linker can adjust this GOT entry. |
| 3434 | Similarly for non-regular got entries. */ |
| 3435 | srelgot->size += sizeof (Elf32_External_Rela); |
| 3436 | } |
| 3437 | } |
| 3438 | /* Update the reloc-specific count. */ |
| 3439 | local_got_refcounts[r_symndx_lgot]++; |
| 3440 | |
| 3441 | /* This one is the sum of all the others. */ |
| 3442 | local_got_refcounts[r_symndx]++; |
| 3443 | } |
| 3444 | break; |
| 3445 | |
| 3446 | case R_CRIS_16_DTPREL: |
| 3447 | case R_CRIS_32_DTPREL: |
| 3448 | case R_CRIS_32_GOTREL: |
| 3449 | /* This reference requires a global offset table. |
| 3450 | FIXME: The actual refcount isn't used currently; the .got |
| 3451 | section can't be removed if there were any references in the |
| 3452 | input. */ |
| 3453 | local_got_refcounts[-1]++; |
| 3454 | break; |
| 3455 | |
| 3456 | handle_gotplt_reloc: |
| 3457 | |
| 3458 | case R_CRIS_32_PLT_GOTREL: |
| 3459 | /* This reference requires a global offset table. */ |
| 3460 | local_got_refcounts[-1]++; |
| 3461 | /* Fall through. */ |
| 3462 | |
| 3463 | case R_CRIS_32_PLT_PCREL: |
| 3464 | /* This symbol requires a procedure linkage table entry. We |
| 3465 | actually build the entry in adjust_dynamic_symbol, |
| 3466 | because this might be a case of linking PIC code which is |
| 3467 | never referenced by a dynamic object, in which case we |
| 3468 | don't need to generate a procedure linkage table entry |
| 3469 | after all. */ |
| 3470 | |
| 3471 | /* Beware: if we'd check for visibility of the symbol here |
| 3472 | (and not marking the need for a PLT when non-visible), we'd |
| 3473 | get into trouble with keeping handling consistent with |
| 3474 | regards to relocs found before definition and GOTPLT |
| 3475 | handling. Eliminable PLT entries will be dealt with later |
| 3476 | anyway. */ |
| 3477 | if (h == NULL) |
| 3478 | continue; |
| 3479 | |
| 3480 | h->needs_plt = 1; |
| 3481 | |
| 3482 | /* If the symbol is forced local, the refcount is unavailable. */ |
| 3483 | if (h->plt.refcount != -1) |
| 3484 | h->plt.refcount++; |
| 3485 | break; |
| 3486 | |
| 3487 | case R_CRIS_8: |
| 3488 | case R_CRIS_16: |
| 3489 | case R_CRIS_32: |
| 3490 | /* Let's help debug shared library creation. Any of these |
| 3491 | relocs *can* be used in shared libs, but pages containing |
| 3492 | them cannot be shared, so they're not appropriate for |
| 3493 | common use. Don't warn for sections we don't care about, |
| 3494 | such as debug sections or non-constant sections. We |
| 3495 | can't help tables of (global) function pointers, for |
| 3496 | example, though they must be emitted in a (writable) data |
| 3497 | section to avoid having impure text sections. */ |
| 3498 | if (bfd_link_pic (info) |
| 3499 | && (sec->flags & SEC_ALLOC) != 0 |
| 3500 | && (sec->flags & SEC_READONLY) != 0) |
| 3501 | { |
| 3502 | /* FIXME: How do we make this optionally a warning only? */ |
| 3503 | _bfd_error_handler |
| 3504 | /* xgettext:c-format */ |
| 3505 | (_("%B, section %A:\n relocation %s should not" |
| 3506 | " be used in a shared object; recompile with -fPIC"), |
| 3507 | abfd, |
| 3508 | sec, |
| 3509 | cris_elf_howto_table[r_type].name); |
| 3510 | } |
| 3511 | |
| 3512 | /* We don't need to handle relocs into sections not going into |
| 3513 | the "real" output. */ |
| 3514 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3515 | break; |
| 3516 | |
| 3517 | if (h != NULL) |
| 3518 | { |
| 3519 | h->non_got_ref = 1; |
| 3520 | |
| 3521 | /* Make sure a plt entry is created for this symbol if it |
| 3522 | turns out to be a function defined by a dynamic object. */ |
| 3523 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 3524 | h->plt.refcount++; |
| 3525 | } |
| 3526 | |
| 3527 | /* If we are creating a shared library and this is not a local |
| 3528 | symbol, we need to copy the reloc into the shared library. |
| 3529 | However when linking with -Bsymbolic and this is a global |
| 3530 | symbol which is defined in an object we are including in the |
| 3531 | link (i.e., DEF_REGULAR is set), then we can resolve the |
| 3532 | reloc directly. At this point we have not seen all the input |
| 3533 | files, so it is possible that DEF_REGULAR is not set now but |
| 3534 | will be set later (it is never cleared). In case of a weak |
| 3535 | definition, DEF_REGULAR may be cleared later by a strong |
| 3536 | definition in a shared library. We account for that |
| 3537 | possibility below by storing information in the relocs_copied |
| 3538 | field of the hash table entry. A similar situation occurs |
| 3539 | when creating shared libraries and symbol visibility changes |
| 3540 | render the symbol local. */ |
| 3541 | |
| 3542 | /* No need to do anything if we're not creating a shared object. */ |
| 3543 | if (! bfd_link_pic (info)) |
| 3544 | break; |
| 3545 | |
| 3546 | /* We may need to create a reloc section in the dynobj and made room |
| 3547 | for this reloc. */ |
| 3548 | if (sreloc == NULL) |
| 3549 | { |
| 3550 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 3551 | (sec, dynobj, 2, abfd, /*rela?*/ TRUE); |
| 3552 | |
| 3553 | if (sreloc == NULL) |
| 3554 | return FALSE; |
| 3555 | } |
| 3556 | |
| 3557 | if (sec->flags & SEC_READONLY) |
| 3558 | info->flags |= DF_TEXTREL; |
| 3559 | |
| 3560 | sreloc->size += sizeof (Elf32_External_Rela); |
| 3561 | break; |
| 3562 | |
| 3563 | case R_CRIS_8_PCREL: |
| 3564 | case R_CRIS_16_PCREL: |
| 3565 | case R_CRIS_32_PCREL: |
| 3566 | if (h != NULL) |
| 3567 | { |
| 3568 | h->non_got_ref = 1; |
| 3569 | |
| 3570 | /* Make sure a plt entry is created for this symbol if it |
| 3571 | turns out to be a function defined by a dynamic object. */ |
| 3572 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 3573 | h->plt.refcount++; |
| 3574 | } |
| 3575 | |
| 3576 | /* If we are creating a shared library and this is not a local |
| 3577 | symbol, we need to copy the reloc into the shared library. |
| 3578 | However when linking with -Bsymbolic and this is a global |
| 3579 | symbol which is defined in an object we are including in the |
| 3580 | link (i.e., DEF_REGULAR is set), then we can resolve the |
| 3581 | reloc directly. At this point we have not seen all the input |
| 3582 | files, so it is possible that DEF_REGULAR is not set now but |
| 3583 | will be set later (it is never cleared). In case of a weak |
| 3584 | definition, DEF_REGULAR may be cleared later by a strong |
| 3585 | definition in a shared library. We account for that |
| 3586 | possibility below by storing information in the relocs_copied |
| 3587 | field of the hash table entry. A similar situation occurs |
| 3588 | when creating shared libraries and symbol visibility changes |
| 3589 | render the symbol local. */ |
| 3590 | |
| 3591 | /* No need to do anything if we're not creating a shared object. */ |
| 3592 | if (! bfd_link_pic (info)) |
| 3593 | break; |
| 3594 | |
| 3595 | /* We don't need to handle relocs into sections not going into |
| 3596 | the "real" output. */ |
| 3597 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3598 | break; |
| 3599 | |
| 3600 | /* If the symbol is local, then we know already we can |
| 3601 | eliminate the reloc. */ |
| 3602 | if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 3603 | break; |
| 3604 | |
| 3605 | /* If this is with -Bsymbolic and the symbol isn't weak, and |
| 3606 | is defined by an ordinary object (the ones we include in |
| 3607 | this shared library) then we can also eliminate the |
| 3608 | reloc. See comment above for more eliminable cases which |
| 3609 | we can't identify at this time. */ |
| 3610 | if (SYMBOLIC_BIND (info, h) |
| 3611 | && h->root.type != bfd_link_hash_defweak |
| 3612 | && h->def_regular) |
| 3613 | break; |
| 3614 | |
| 3615 | /* We may need to create a reloc section in the dynobj and made room |
| 3616 | for this reloc. */ |
| 3617 | if (sreloc == NULL) |
| 3618 | { |
| 3619 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 3620 | (sec, dynobj, 2, abfd, /*rela?*/ TRUE); |
| 3621 | |
| 3622 | if (sreloc == NULL) |
| 3623 | return FALSE; |
| 3624 | } |
| 3625 | |
| 3626 | sreloc->size += sizeof (Elf32_External_Rela); |
| 3627 | |
| 3628 | /* We count the number of PC relative relocations we have |
| 3629 | entered for this symbol, so that we can discard them |
| 3630 | again if the symbol is later defined by a regular object. |
| 3631 | We know that h is really a pointer to an |
| 3632 | elf_cris_link_hash_entry. */ |
| 3633 | { |
| 3634 | struct elf_cris_link_hash_entry *eh; |
| 3635 | struct elf_cris_pcrel_relocs_copied *p; |
| 3636 | |
| 3637 | eh = elf_cris_hash_entry (h); |
| 3638 | |
| 3639 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) |
| 3640 | if (p->section == sec) |
| 3641 | break; |
| 3642 | |
| 3643 | if (p == NULL) |
| 3644 | { |
| 3645 | p = ((struct elf_cris_pcrel_relocs_copied *) |
| 3646 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
| 3647 | if (p == NULL) |
| 3648 | return FALSE; |
| 3649 | p->next = eh->pcrel_relocs_copied; |
| 3650 | eh->pcrel_relocs_copied = p; |
| 3651 | p->section = sec; |
| 3652 | p->count = 0; |
| 3653 | p->r_type = r_type; |
| 3654 | } |
| 3655 | |
| 3656 | ++p->count; |
| 3657 | } |
| 3658 | break; |
| 3659 | |
| 3660 | /* This relocation describes the C++ object vtable hierarchy. |
| 3661 | Reconstruct it for later use during GC. */ |
| 3662 | case R_CRIS_GNU_VTINHERIT: |
| 3663 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 3664 | return FALSE; |
| 3665 | break; |
| 3666 | |
| 3667 | /* This relocation describes which C++ vtable entries are actually |
| 3668 | used. Record for later use during GC. */ |
| 3669 | case R_CRIS_GNU_VTENTRY: |
| 3670 | BFD_ASSERT (h != NULL); |
| 3671 | if (h != NULL |
| 3672 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 3673 | return FALSE; |
| 3674 | break; |
| 3675 | |
| 3676 | case R_CRIS_16_TPREL: |
| 3677 | case R_CRIS_32_TPREL: |
| 3678 | /* Already warned above, when necessary. */ |
| 3679 | break; |
| 3680 | |
| 3681 | default: |
| 3682 | /* Other relocs do not appear here. */ |
| 3683 | bfd_set_error (bfd_error_bad_value); |
| 3684 | return FALSE; |
| 3685 | } |
| 3686 | } |
| 3687 | |
| 3688 | return TRUE; |
| 3689 | } |
| 3690 | |
| 3691 | /* Set the sizes of the dynamic sections. */ |
| 3692 | |
| 3693 | static bfd_boolean |
| 3694 | elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 3695 | struct bfd_link_info *info) |
| 3696 | { |
| 3697 | struct elf_cris_link_hash_table * htab; |
| 3698 | bfd *dynobj; |
| 3699 | asection *s; |
| 3700 | bfd_boolean plt; |
| 3701 | bfd_boolean relocs; |
| 3702 | |
| 3703 | htab = elf_cris_hash_table (info); |
| 3704 | if (htab == NULL) |
| 3705 | return FALSE; |
| 3706 | |
| 3707 | dynobj = htab->root.dynobj; |
| 3708 | BFD_ASSERT (dynobj != NULL); |
| 3709 | |
| 3710 | if (htab->root.dynamic_sections_created) |
| 3711 | { |
| 3712 | /* Set the contents of the .interp section to the interpreter. */ |
| 3713 | if (bfd_link_executable (info) && !info->nointerp) |
| 3714 | { |
| 3715 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 3716 | BFD_ASSERT (s != NULL); |
| 3717 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 3718 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 3719 | } |
| 3720 | } |
| 3721 | else |
| 3722 | { |
| 3723 | /* Adjust all expected GOTPLT uses to use a GOT entry instead. */ |
| 3724 | elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got, |
| 3725 | info); |
| 3726 | |
| 3727 | /* We may have created entries in the .rela.got section. |
| 3728 | However, if we are not creating the dynamic sections, we will |
| 3729 | not actually use these entries. Reset the size of .rela.got, |
| 3730 | which will cause it to get stripped from the output file |
| 3731 | below. */ |
| 3732 | s = htab->root.srelgot; |
| 3733 | if (s != NULL) |
| 3734 | s->size = 0; |
| 3735 | } |
| 3736 | |
| 3737 | /* If this is a -Bsymbolic shared link, then we need to discard all PC |
| 3738 | relative relocs against symbols defined in a regular object. We |
| 3739 | allocated space for them in the check_relocs routine, but we will not |
| 3740 | fill them in in the relocate_section routine. We also discard space |
| 3741 | for relocs that have become for local symbols due to symbol |
| 3742 | visibility changes. For programs, we discard space for relocs for |
| 3743 | symbols not referenced by any dynamic object. */ |
| 3744 | if (bfd_link_pic (info)) |
| 3745 | elf_cris_link_hash_traverse (htab, |
| 3746 | elf_cris_discard_excess_dso_dynamics, |
| 3747 | info); |
| 3748 | else |
| 3749 | elf_cris_link_hash_traverse (htab, |
| 3750 | elf_cris_discard_excess_program_dynamics, |
| 3751 | info); |
| 3752 | |
| 3753 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 3754 | determined the sizes of the various dynamic sections. Allocate |
| 3755 | memory for them. */ |
| 3756 | plt = FALSE; |
| 3757 | relocs = FALSE; |
| 3758 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 3759 | { |
| 3760 | const char *name; |
| 3761 | |
| 3762 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 3763 | continue; |
| 3764 | |
| 3765 | /* It's OK to base decisions on the section name, because none |
| 3766 | of the dynobj section names depend upon the input files. */ |
| 3767 | name = bfd_get_section_name (dynobj, s); |
| 3768 | |
| 3769 | if (strcmp (name, ".plt") == 0) |
| 3770 | { |
| 3771 | /* Remember whether there is a PLT. */ |
| 3772 | plt = s->size != 0; |
| 3773 | } |
| 3774 | else if (strcmp (name, ".got.plt") == 0) |
| 3775 | { |
| 3776 | /* The .got.plt contains the .got header as well as the |
| 3777 | actual .got.plt contents. The .got header may contain a |
| 3778 | R_CRIS_DTPMOD entry at index 3. */ |
| 3779 | s->size += htab->dtpmod_refcount != 0 |
| 3780 | ? 8 : 0; |
| 3781 | } |
| 3782 | else if (CONST_STRNEQ (name, ".rela")) |
| 3783 | { |
| 3784 | if (strcmp (name, ".rela.got") == 0 |
| 3785 | && htab->dtpmod_refcount != 0 |
| 3786 | && bfd_link_pic (info)) |
| 3787 | s->size += sizeof (Elf32_External_Rela); |
| 3788 | |
| 3789 | if (s->size != 0) |
| 3790 | { |
| 3791 | /* Remember whether there are any reloc sections other |
| 3792 | than .rela.plt. */ |
| 3793 | if (strcmp (name, ".rela.plt") != 0) |
| 3794 | relocs = TRUE; |
| 3795 | |
| 3796 | /* We use the reloc_count field as a counter if we need |
| 3797 | to copy relocs into the output file. */ |
| 3798 | s->reloc_count = 0; |
| 3799 | } |
| 3800 | } |
| 3801 | else if (! CONST_STRNEQ (name, ".got") |
| 3802 | && strcmp (name, ".dynbss") != 0 |
| 3803 | && s != htab->root.sdynrelro) |
| 3804 | { |
| 3805 | /* It's not one of our sections, so don't allocate space. */ |
| 3806 | continue; |
| 3807 | } |
| 3808 | |
| 3809 | if (s->size == 0) |
| 3810 | { |
| 3811 | /* If we don't need this section, strip it from the |
| 3812 | output file. This is mostly to handle .rela.bss and |
| 3813 | .rela.plt. We must create both sections in |
| 3814 | create_dynamic_sections, because they must be created |
| 3815 | before the linker maps input sections to output |
| 3816 | sections. The linker does that before |
| 3817 | adjust_dynamic_symbol is called, and it is that |
| 3818 | function which decides whether anything needs to go |
| 3819 | into these sections. */ |
| 3820 | s->flags |= SEC_EXCLUDE; |
| 3821 | continue; |
| 3822 | } |
| 3823 | |
| 3824 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 3825 | continue; |
| 3826 | |
| 3827 | /* Allocate memory for the section contents. We use bfd_zalloc here |
| 3828 | in case unused entries are not reclaimed before the section's |
| 3829 | contents are written out. This should not happen, but this way |
| 3830 | if it does, we will not write out garbage. For reloc sections, |
| 3831 | this will make entries have the type R_CRIS_NONE. */ |
| 3832 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 3833 | if (s->contents == NULL) |
| 3834 | return FALSE; |
| 3835 | } |
| 3836 | |
| 3837 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3838 | { |
| 3839 | /* Add some entries to the .dynamic section. We fill in the |
| 3840 | values later, in elf_cris_finish_dynamic_sections, but we |
| 3841 | must add the entries now so that we get the correct size for |
| 3842 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 3843 | dynamic linker and used by the debugger. */ |
| 3844 | #define add_dynamic_entry(TAG, VAL) \ |
| 3845 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 3846 | |
| 3847 | if (!bfd_link_pic (info)) |
| 3848 | { |
| 3849 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 3850 | return FALSE; |
| 3851 | } |
| 3852 | |
| 3853 | if (plt) |
| 3854 | { |
| 3855 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 3856 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 3857 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 3858 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 3859 | return FALSE; |
| 3860 | } |
| 3861 | |
| 3862 | if (relocs) |
| 3863 | { |
| 3864 | if (!add_dynamic_entry (DT_RELA, 0) |
| 3865 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 3866 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 3867 | return FALSE; |
| 3868 | } |
| 3869 | |
| 3870 | if ((info->flags & DF_TEXTREL) != 0) |
| 3871 | { |
| 3872 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 3873 | return FALSE; |
| 3874 | info->flags |= DF_TEXTREL; |
| 3875 | } |
| 3876 | } |
| 3877 | #undef add_dynamic_entry |
| 3878 | |
| 3879 | return TRUE; |
| 3880 | } |
| 3881 | |
| 3882 | /* This function is called via elf_cris_link_hash_traverse if we are |
| 3883 | creating a shared object. In the -Bsymbolic case, it discards the |
| 3884 | space allocated to copy PC relative relocs against symbols which |
| 3885 | are defined in regular objects. For the normal non-symbolic case, |
| 3886 | we also discard space for relocs that have become local due to |
| 3887 | symbol visibility changes. We allocated space for them in the |
| 3888 | check_relocs routine, but we won't fill them in in the |
| 3889 | relocate_section routine. */ |
| 3890 | |
| 3891 | static bfd_boolean |
| 3892 | elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h, |
| 3893 | void * inf) |
| 3894 | { |
| 3895 | struct elf_cris_pcrel_relocs_copied *s; |
| 3896 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 3897 | |
| 3898 | /* If a symbol has been forced local or we have found a regular |
| 3899 | definition for the symbolic link case, then we won't be needing |
| 3900 | any relocs. */ |
| 3901 | if (h->root.def_regular |
| 3902 | && (h->root.forced_local |
| 3903 | || SYMBOLIC_BIND (info, &h->root))) |
| 3904 | { |
| 3905 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) |
| 3906 | { |
| 3907 | asection *sreloc |
| 3908 | = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info) |
| 3909 | ->dynobj, |
| 3910 | s->section, |
| 3911 | /*rela?*/ TRUE); |
| 3912 | sreloc->size -= s->count * sizeof (Elf32_External_Rela); |
| 3913 | } |
| 3914 | return TRUE; |
| 3915 | } |
| 3916 | |
| 3917 | /* If we have accounted for PC-relative relocs for read-only |
| 3918 | sections, now is the time to warn for them. We can't do it in |
| 3919 | cris_elf_check_relocs, because we don't know the status of all |
| 3920 | symbols at that time (and it's common to force symbols local |
| 3921 | late). */ |
| 3922 | |
| 3923 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) |
| 3924 | if ((s->section->flags & SEC_READONLY) != 0) |
| 3925 | { |
| 3926 | /* FIXME: How do we make this optionally a warning only? */ |
| 3927 | _bfd_error_handler |
| 3928 | /* xgettext:c-format */ |
| 3929 | (_("%B, section `%A', to symbol `%s':\n" |
| 3930 | " relocation %s should not be used" |
| 3931 | " in a shared object; recompile with -fPIC"), |
| 3932 | s->section->owner, |
| 3933 | s->section, |
| 3934 | h->root.root.root.string, |
| 3935 | cris_elf_howto_table[s->r_type].name); |
| 3936 | |
| 3937 | info->flags |= DF_TEXTREL; |
| 3938 | } |
| 3939 | |
| 3940 | return TRUE; |
| 3941 | } |
| 3942 | |
| 3943 | /* This function is called via elf_cris_link_hash_traverse if we are *not* |
| 3944 | creating a shared object. We discard space for relocs for symbols put |
| 3945 | in the .got, but which we found we do not have to resolve at run-time. */ |
| 3946 | |
| 3947 | static bfd_boolean |
| 3948 | elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h, |
| 3949 | void * inf) |
| 3950 | { |
| 3951 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 3952 | |
| 3953 | /* If we're not creating a shared library and have a symbol which is |
| 3954 | referred to by .got references, but the symbol is defined locally, |
| 3955 | (or rather, not defined by a DSO) then lose the reloc for the .got |
| 3956 | (don't allocate room for it). Likewise for relocs for something |
| 3957 | for which we create a PLT. */ |
| 3958 | if (!h->root.def_dynamic |
| 3959 | || h->root.plt.refcount > 0) |
| 3960 | { |
| 3961 | if (h->reg_got_refcount > 0 |
| 3962 | /* The size of this section is only valid and in sync with the |
| 3963 | various reference counts if we do dynamic; don't decrement it |
| 3964 | otherwise. */ |
| 3965 | && elf_hash_table (info)->dynamic_sections_created) |
| 3966 | { |
| 3967 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 3968 | asection *srelgot = elf_hash_table (info)->srelgot; |
| 3969 | |
| 3970 | BFD_ASSERT (dynobj != NULL); |
| 3971 | BFD_ASSERT (srelgot != NULL); |
| 3972 | |
| 3973 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 3974 | } |
| 3975 | |
| 3976 | /* If the locally-defined symbol isn't used by a DSO, then we don't |
| 3977 | have to export it as a dynamic symbol. This was already done for |
| 3978 | functions; doing this for all symbols would presumably not |
| 3979 | introduce new problems. Of course we don't do this if we're |
| 3980 | exporting all dynamic symbols, or all data symbols, regardless of |
| 3981 | them being referenced or not. */ |
| 3982 | if (! (info->export_dynamic |
| 3983 | || (h->root.type != STT_FUNC && info->dynamic_data)) |
| 3984 | && h->root.dynindx != -1 |
| 3985 | && !h->root.def_dynamic |
| 3986 | && !h->root.ref_dynamic) |
| 3987 | { |
| 3988 | h->root.dynindx = -1; |
| 3989 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 3990 | h->root.dynstr_index); |
| 3991 | } |
| 3992 | } |
| 3993 | |
| 3994 | return TRUE; |
| 3995 | } |
| 3996 | |
| 3997 | /* Reject a file depending on presence and expectation of prefixed |
| 3998 | underscores on symbols. */ |
| 3999 | |
| 4000 | static bfd_boolean |
| 4001 | cris_elf_object_p (bfd *abfd) |
| 4002 | { |
| 4003 | if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags)) |
| 4004 | return FALSE; |
| 4005 | |
| 4006 | if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)) |
| 4007 | return (bfd_get_symbol_leading_char (abfd) == '_'); |
| 4008 | else |
| 4009 | return (bfd_get_symbol_leading_char (abfd) == 0); |
| 4010 | } |
| 4011 | |
| 4012 | /* Mark presence or absence of leading underscore. Set machine type |
| 4013 | flags from mach type. */ |
| 4014 | |
| 4015 | static void |
| 4016 | cris_elf_final_write_processing (bfd *abfd, |
| 4017 | bfd_boolean linker ATTRIBUTE_UNUSED) |
| 4018 | { |
| 4019 | unsigned long e_flags = elf_elfheader (abfd)->e_flags; |
| 4020 | |
| 4021 | e_flags &= ~EF_CRIS_UNDERSCORE; |
| 4022 | if (bfd_get_symbol_leading_char (abfd) == '_') |
| 4023 | e_flags |= EF_CRIS_UNDERSCORE; |
| 4024 | |
| 4025 | switch (bfd_get_mach (abfd)) |
| 4026 | { |
| 4027 | case bfd_mach_cris_v0_v10: |
| 4028 | e_flags |= EF_CRIS_VARIANT_ANY_V0_V10; |
| 4029 | break; |
| 4030 | |
| 4031 | case bfd_mach_cris_v10_v32: |
| 4032 | e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32; |
| 4033 | break; |
| 4034 | |
| 4035 | case bfd_mach_cris_v32: |
| 4036 | e_flags |= EF_CRIS_VARIANT_V32; |
| 4037 | break; |
| 4038 | |
| 4039 | default: |
| 4040 | _bfd_abort (__FILE__, __LINE__, |
| 4041 | _("Unexpected machine number")); |
| 4042 | } |
| 4043 | |
| 4044 | elf_elfheader (abfd)->e_flags = e_flags; |
| 4045 | } |
| 4046 | |
| 4047 | /* Set the mach type from e_flags value. */ |
| 4048 | |
| 4049 | static bfd_boolean |
| 4050 | cris_elf_set_mach_from_flags (bfd *abfd, |
| 4051 | unsigned long flags) |
| 4052 | { |
| 4053 | switch (flags & EF_CRIS_VARIANT_MASK) |
| 4054 | { |
| 4055 | case EF_CRIS_VARIANT_ANY_V0_V10: |
| 4056 | bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10); |
| 4057 | break; |
| 4058 | |
| 4059 | case EF_CRIS_VARIANT_V32: |
| 4060 | bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32); |
| 4061 | break; |
| 4062 | |
| 4063 | case EF_CRIS_VARIANT_COMMON_V10_V32: |
| 4064 | bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32); |
| 4065 | break; |
| 4066 | |
| 4067 | default: |
| 4068 | /* Since we don't recognize them, we obviously can't support them |
| 4069 | with this code; we'd have to require that all future handling |
| 4070 | would be optional. */ |
| 4071 | bfd_set_error (bfd_error_wrong_format); |
| 4072 | return FALSE; |
| 4073 | } |
| 4074 | |
| 4075 | return TRUE; |
| 4076 | } |
| 4077 | |
| 4078 | /* Display the flags field. */ |
| 4079 | |
| 4080 | static bfd_boolean |
| 4081 | cris_elf_print_private_bfd_data (bfd *abfd, void * ptr) |
| 4082 | { |
| 4083 | FILE *file = (FILE *) ptr; |
| 4084 | |
| 4085 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 4086 | |
| 4087 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 4088 | |
| 4089 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 4090 | |
| 4091 | if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE) |
| 4092 | fprintf (file, _(" [symbols have a _ prefix]")); |
| 4093 | if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) |
| 4094 | == EF_CRIS_VARIANT_COMMON_V10_V32) |
| 4095 | fprintf (file, _(" [v10 and v32]")); |
| 4096 | if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) |
| 4097 | == EF_CRIS_VARIANT_V32) |
| 4098 | fprintf (file, _(" [v32]")); |
| 4099 | |
| 4100 | fputc ('\n', file); |
| 4101 | return TRUE; |
| 4102 | } |
| 4103 | |
| 4104 | /* Don't mix files with and without a leading underscore. */ |
| 4105 | |
| 4106 | static bfd_boolean |
| 4107 | cris_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 4108 | { |
| 4109 | bfd *obfd = info->output_bfd; |
| 4110 | int imach, omach; |
| 4111 | |
| 4112 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
| 4113 | return FALSE; |
| 4114 | |
| 4115 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4116 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4117 | return TRUE; |
| 4118 | |
| 4119 | imach = bfd_get_mach (ibfd); |
| 4120 | |
| 4121 | if (! elf_flags_init (obfd)) |
| 4122 | { |
| 4123 | /* This happens when ld starts out with a 'blank' output file. */ |
| 4124 | elf_flags_init (obfd) = TRUE; |
| 4125 | |
| 4126 | /* We ignore the linker-set mach, and instead set it according to |
| 4127 | the first input file. This would also happen if we could |
| 4128 | somehow filter out the OUTPUT_ARCH () setting from elf.sc. |
| 4129 | This allows us to keep the same linker config across |
| 4130 | cris(v0..v10) and crisv32. The drawback is that we can't force |
| 4131 | the output type, which might be a sane thing to do for a |
| 4132 | v10+v32 compatibility object. */ |
| 4133 | if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) |
| 4134 | return FALSE; |
| 4135 | } |
| 4136 | |
| 4137 | if (bfd_get_symbol_leading_char (ibfd) |
| 4138 | != bfd_get_symbol_leading_char (obfd)) |
| 4139 | { |
| 4140 | _bfd_error_handler |
| 4141 | (bfd_get_symbol_leading_char (ibfd) == '_' |
| 4142 | ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols") |
| 4143 | : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"), |
| 4144 | ibfd); |
| 4145 | bfd_set_error (bfd_error_bad_value); |
| 4146 | return FALSE; |
| 4147 | } |
| 4148 | |
| 4149 | omach = bfd_get_mach (obfd); |
| 4150 | |
| 4151 | if (imach != omach) |
| 4152 | { |
| 4153 | /* We can get an incompatible combination only if either is |
| 4154 | bfd_mach_cris_v32, and the other one isn't compatible. */ |
| 4155 | if ((imach == bfd_mach_cris_v32 |
| 4156 | && omach != bfd_mach_cris_v10_v32) |
| 4157 | || (omach == bfd_mach_cris_v32 |
| 4158 | && imach != bfd_mach_cris_v10_v32)) |
| 4159 | { |
| 4160 | _bfd_error_handler |
| 4161 | ((imach == bfd_mach_cris_v32) |
| 4162 | ? _("%B contains CRIS v32 code, incompatible" |
| 4163 | " with previous objects") |
| 4164 | : _("%B contains non-CRIS-v32 code, incompatible" |
| 4165 | " with previous objects"), |
| 4166 | ibfd); |
| 4167 | bfd_set_error (bfd_error_bad_value); |
| 4168 | return FALSE; |
| 4169 | } |
| 4170 | |
| 4171 | /* We don't have to check the case where the input is compatible |
| 4172 | with v10 and v32, because the output is already known to be set |
| 4173 | to the other (compatible) mach. */ |
| 4174 | if (omach == bfd_mach_cris_v10_v32 |
| 4175 | && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) |
| 4176 | return FALSE; |
| 4177 | } |
| 4178 | |
| 4179 | return TRUE; |
| 4180 | } |
| 4181 | |
| 4182 | /* Do side-effects of e_flags copying to obfd. */ |
| 4183 | |
| 4184 | static bfd_boolean |
| 4185 | cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4186 | { |
| 4187 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4188 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4189 | return TRUE; |
| 4190 | |
| 4191 | /* Call the base function. */ |
| 4192 | if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd)) |
| 4193 | return FALSE; |
| 4194 | |
| 4195 | /* Do what we really came here for. */ |
| 4196 | return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd)); |
| 4197 | } |
| 4198 | |
| 4199 | static enum elf_reloc_type_class |
| 4200 | elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4201 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 4202 | const Elf_Internal_Rela *rela) |
| 4203 | { |
| 4204 | enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info); |
| 4205 | switch (r_type) |
| 4206 | { |
| 4207 | case R_CRIS_RELATIVE: |
| 4208 | return reloc_class_relative; |
| 4209 | case R_CRIS_JUMP_SLOT: |
| 4210 | return reloc_class_plt; |
| 4211 | case R_CRIS_COPY: |
| 4212 | return reloc_class_copy; |
| 4213 | default: |
| 4214 | return reloc_class_normal; |
| 4215 | } |
| 4216 | } |
| 4217 | |
| 4218 | /* The elf_backend_got_elt_size worker. For one symbol, we can have up to |
| 4219 | two GOT entries from three types with two different sizes. We handle |
| 4220 | it as a single entry, so we can use the regular offset-calculation |
| 4221 | machinery. */ |
| 4222 | |
| 4223 | static bfd_vma |
| 4224 | elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED, |
| 4225 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4226 | struct elf_link_hash_entry *hr, |
| 4227 | bfd *ibfd, |
| 4228 | unsigned long symndx) |
| 4229 | { |
| 4230 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr; |
| 4231 | bfd_vma eltsiz = 0; |
| 4232 | |
| 4233 | /* We may have one regular GOT entry or up to two TLS GOT |
| 4234 | entries. */ |
| 4235 | if (h == NULL) |
| 4236 | { |
| 4237 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 4238 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd); |
| 4239 | |
| 4240 | BFD_ASSERT (local_got_refcounts != NULL); |
| 4241 | |
| 4242 | if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0) |
| 4243 | { |
| 4244 | /* We can't have a variable referred to both as a regular |
| 4245 | variable and through TLS relocs. */ |
| 4246 | BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0 |
| 4247 | && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0); |
| 4248 | return 4; |
| 4249 | } |
| 4250 | |
| 4251 | if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0) |
| 4252 | eltsiz += 8; |
| 4253 | |
| 4254 | if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0) |
| 4255 | eltsiz += 4; |
| 4256 | } |
| 4257 | else |
| 4258 | { |
| 4259 | struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h); |
| 4260 | if (hh->reg_got_refcount > 0) |
| 4261 | { |
| 4262 | /* The actual error-on-input is emitted elsewhere. */ |
| 4263 | BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0); |
| 4264 | return 4; |
| 4265 | } |
| 4266 | |
| 4267 | if (hh->dtp_refcount > 0) |
| 4268 | eltsiz += 8; |
| 4269 | |
| 4270 | if (hh->tprel_refcount > 0) |
| 4271 | eltsiz += 4; |
| 4272 | } |
| 4273 | |
| 4274 | /* We're only called when h->got.refcount is non-zero, so we must |
| 4275 | have a non-zero size. */ |
| 4276 | BFD_ASSERT (eltsiz != 0); |
| 4277 | return eltsiz; |
| 4278 | } |
| 4279 | \f |
| 4280 | #define ELF_ARCH bfd_arch_cris |
| 4281 | #define ELF_TARGET_ID CRIS_ELF_DATA |
| 4282 | #define ELF_MACHINE_CODE EM_CRIS |
| 4283 | #define ELF_MAXPAGESIZE 0x2000 |
| 4284 | |
| 4285 | #define TARGET_LITTLE_SYM cris_elf32_vec |
| 4286 | #define TARGET_LITTLE_NAME "elf32-cris" |
| 4287 | #define elf_symbol_leading_char 0 |
| 4288 | |
| 4289 | #define elf_info_to_howto_rel NULL |
| 4290 | #define elf_info_to_howto cris_info_to_howto_rela |
| 4291 | #define elf_backend_relocate_section cris_elf_relocate_section |
| 4292 | #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook |
| 4293 | #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook |
| 4294 | #define elf_backend_plt_sym_val cris_elf_plt_sym_val |
| 4295 | #define elf_backend_check_relocs cris_elf_check_relocs |
| 4296 | #define elf_backend_grok_prstatus cris_elf_grok_prstatus |
| 4297 | #define elf_backend_grok_psinfo cris_elf_grok_psinfo |
| 4298 | |
| 4299 | #define elf_backend_can_gc_sections 1 |
| 4300 | #define elf_backend_can_refcount 1 |
| 4301 | |
| 4302 | #define elf_backend_object_p cris_elf_object_p |
| 4303 | #define elf_backend_final_write_processing \ |
| 4304 | cris_elf_final_write_processing |
| 4305 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 4306 | cris_elf_print_private_bfd_data |
| 4307 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 4308 | cris_elf_merge_private_bfd_data |
| 4309 | #define bfd_elf32_bfd_copy_private_bfd_data \ |
| 4310 | cris_elf_copy_private_bfd_data |
| 4311 | |
| 4312 | #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup |
| 4313 | #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup |
| 4314 | |
| 4315 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 4316 | elf_cris_link_hash_table_create |
| 4317 | #define elf_backend_adjust_dynamic_symbol \ |
| 4318 | elf_cris_adjust_dynamic_symbol |
| 4319 | #define elf_backend_copy_indirect_symbol \ |
| 4320 | elf_cris_copy_indirect_symbol |
| 4321 | #define elf_backend_size_dynamic_sections \ |
| 4322 | elf_cris_size_dynamic_sections |
| 4323 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 4324 | #define elf_backend_finish_dynamic_symbol \ |
| 4325 | elf_cris_finish_dynamic_symbol |
| 4326 | #define elf_backend_finish_dynamic_sections \ |
| 4327 | elf_cris_finish_dynamic_sections |
| 4328 | #define elf_backend_create_dynamic_sections \ |
| 4329 | _bfd_elf_create_dynamic_sections |
| 4330 | #define bfd_elf32_bfd_final_link \ |
| 4331 | bfd_elf_gc_common_final_link |
| 4332 | #define elf_backend_hide_symbol elf_cris_hide_symbol |
| 4333 | #define elf_backend_reloc_type_class elf_cris_reloc_type_class |
| 4334 | |
| 4335 | #define elf_backend_want_got_plt 1 |
| 4336 | #define elf_backend_plt_readonly 1 |
| 4337 | #define elf_backend_want_plt_sym 0 |
| 4338 | #define elf_backend_got_header_size 12 |
| 4339 | #define elf_backend_got_elt_size elf_cris_got_elt_size |
| 4340 | #define elf_backend_dtrel_excludes_plt 1 |
| 4341 | #define elf_backend_want_dynrelro 1 |
| 4342 | |
| 4343 | /* Later, we my want to optimize RELA entries into REL entries for dynamic |
| 4344 | linking and libraries (if it's a win of any significance). Until then, |
| 4345 | take the easy route. */ |
| 4346 | #define elf_backend_may_use_rel_p 0 |
| 4347 | #define elf_backend_may_use_rela_p 1 |
| 4348 | #define elf_backend_rela_normal 1 |
| 4349 | |
| 4350 | #include "elf32-target.h" |
| 4351 | |
| 4352 | #undef TARGET_LITTLE_SYM |
| 4353 | #undef TARGET_LITTLE_NAME |
| 4354 | #undef elf_symbol_leading_char |
| 4355 | |
| 4356 | #define TARGET_LITTLE_SYM cris_elf32_us_vec |
| 4357 | #define TARGET_LITTLE_NAME "elf32-us-cris" |
| 4358 | #define elf_symbol_leading_char '_' |
| 4359 | #undef elf32_bed |
| 4360 | #define elf32_bed elf32_us_cris_bed |
| 4361 | |
| 4362 | #include "elf32-target.h" |