| 1 | /* PowerPC64-specific support for 64-bit ELF. |
| 2 | Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
| 3 | Written by Linus Nordberg, Swox AB <info@swox.com>, |
| 4 | based on elf32-ppc.c by Ian Lance Taylor. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* This file is based on the 64-bit PowerPC ELF ABI. It is also based |
| 23 | on the file elf32-ppc.c. */ |
| 24 | |
| 25 | #include "bfd.h" |
| 26 | #include "sysdep.h" |
| 27 | #include "bfdlink.h" |
| 28 | #include "libbfd.h" |
| 29 | #include "elf-bfd.h" |
| 30 | #include "elf/ppc.h" |
| 31 | #include "elf64-ppc.h" |
| 32 | |
| 33 | static void ppc_howto_init |
| 34 | PARAMS ((void)); |
| 35 | static reloc_howto_type *ppc64_elf_reloc_type_lookup |
| 36 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 37 | static void ppc64_elf_info_to_howto |
| 38 | PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)); |
| 39 | static bfd_reloc_status_type ppc64_elf_ha_reloc |
| 40 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 41 | static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
| 42 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 43 | static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
| 44 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 45 | static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
| 46 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 47 | static bfd_reloc_status_type ppc64_elf_toc_reloc |
| 48 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 49 | static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
| 50 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 51 | static bfd_reloc_status_type ppc64_elf_toc64_reloc |
| 52 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 53 | static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
| 54 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 55 | static bfd_boolean ppc64_elf_object_p |
| 56 | PARAMS ((bfd *)); |
| 57 | static bfd_boolean ppc64_elf_merge_private_bfd_data |
| 58 | PARAMS ((bfd *, bfd *)); |
| 59 | |
| 60 | |
| 61 | /* The name of the dynamic interpreter. This is put in the .interp |
| 62 | section. */ |
| 63 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 64 | |
| 65 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 66 | #define PLT_ENTRY_SIZE 24 |
| 67 | |
| 68 | /* The initial size of the plt reserved for the dynamic linker. */ |
| 69 | #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE |
| 70 | |
| 71 | /* TOC base pointers offset from start of TOC. */ |
| 72 | #define TOC_BASE_OFF (0x8000) |
| 73 | |
| 74 | /* .plt call stub instructions. */ |
| 75 | #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ |
| 76 | #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ |
| 77 | #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ |
| 78 | #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ |
| 79 | #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ |
| 80 | /* ld %r11,xxx+16@l(%r12) */ |
| 81 | #define BCTR 0x4e800420 /* bctr */ |
| 82 | |
| 83 | /* The normal stub is this size. */ |
| 84 | #define PLT_CALL_STUB_SIZE (7*4) |
| 85 | |
| 86 | /* But sometimes the .plt entry crosses a 64k boundary, and we need |
| 87 | to adjust the high word with this insn. */ |
| 88 | #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */ |
| 89 | |
| 90 | /* The .glink fixup call stub is the same as the .plt call stub, but |
| 91 | the first instruction restores r2, and the std is omitted. */ |
| 92 | #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ |
| 93 | |
| 94 | /* Always allow this much space. */ |
| 95 | #define GLINK_CALL_STUB_SIZE (8*4) |
| 96 | |
| 97 | /* Pad with this. */ |
| 98 | #define NOP 0x60000000 |
| 99 | |
| 100 | /* Some other nops. */ |
| 101 | #define CROR_151515 0x4def7b82 |
| 102 | #define CROR_313131 0x4ffffb82 |
| 103 | |
| 104 | /* .glink entries for the first 32k functions are two instructions. */ |
| 105 | #define LI_R0_0 0x38000000 /* li %r0,0 */ |
| 106 | #define B_DOT 0x48000000 /* b . */ |
| 107 | |
| 108 | /* After that, we need two instructions to load the index, followed by |
| 109 | a branch. */ |
| 110 | #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ |
| 111 | #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
| 112 | |
| 113 | /* Instructions to save and restore floating point regs. */ |
| 114 | #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
| 115 | #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ |
| 116 | #define BLR 0x4e800020 /* blr */ |
| 117 | |
| 118 | /* Since .opd is an array of descriptors and each entry will end up |
| 119 | with identical R_PPC64_RELATIVE relocs, there is really no need to |
| 120 | propagate .opd relocs; The dynamic linker should be taught to |
| 121 | relocate .opd without reloc entries. */ |
| 122 | #ifndef NO_OPD_RELOCS |
| 123 | #define NO_OPD_RELOCS 0 |
| 124 | #endif |
| 125 | \f |
| 126 | #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) |
| 127 | |
| 128 | /* Relocation HOWTO's. */ |
| 129 | static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max]; |
| 130 | |
| 131 | static reloc_howto_type ppc64_elf_howto_raw[] = { |
| 132 | /* This reloc does nothing. */ |
| 133 | HOWTO (R_PPC64_NONE, /* type */ |
| 134 | 0, /* rightshift */ |
| 135 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 136 | 8, /* bitsize */ |
| 137 | FALSE, /* pc_relative */ |
| 138 | 0, /* bitpos */ |
| 139 | complain_overflow_dont, /* complain_on_overflow */ |
| 140 | bfd_elf_generic_reloc, /* special_function */ |
| 141 | "R_PPC64_NONE", /* name */ |
| 142 | FALSE, /* partial_inplace */ |
| 143 | 0, /* src_mask */ |
| 144 | 0, /* dst_mask */ |
| 145 | FALSE), /* pcrel_offset */ |
| 146 | |
| 147 | /* A standard 32 bit relocation. */ |
| 148 | HOWTO (R_PPC64_ADDR32, /* type */ |
| 149 | 0, /* rightshift */ |
| 150 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 151 | 32, /* bitsize */ |
| 152 | FALSE, /* pc_relative */ |
| 153 | 0, /* bitpos */ |
| 154 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 155 | bfd_elf_generic_reloc, /* special_function */ |
| 156 | "R_PPC64_ADDR32", /* name */ |
| 157 | FALSE, /* partial_inplace */ |
| 158 | 0, /* src_mask */ |
| 159 | 0xffffffff, /* dst_mask */ |
| 160 | FALSE), /* pcrel_offset */ |
| 161 | |
| 162 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 163 | FIXME: we don't check that, we just clear them. */ |
| 164 | HOWTO (R_PPC64_ADDR24, /* type */ |
| 165 | 0, /* rightshift */ |
| 166 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 167 | 26, /* bitsize */ |
| 168 | FALSE, /* pc_relative */ |
| 169 | 0, /* bitpos */ |
| 170 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 171 | bfd_elf_generic_reloc, /* special_function */ |
| 172 | "R_PPC64_ADDR24", /* name */ |
| 173 | FALSE, /* partial_inplace */ |
| 174 | 0, /* src_mask */ |
| 175 | 0x03fffffc, /* dst_mask */ |
| 176 | FALSE), /* pcrel_offset */ |
| 177 | |
| 178 | /* A standard 16 bit relocation. */ |
| 179 | HOWTO (R_PPC64_ADDR16, /* type */ |
| 180 | 0, /* rightshift */ |
| 181 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 182 | 16, /* bitsize */ |
| 183 | FALSE, /* pc_relative */ |
| 184 | 0, /* bitpos */ |
| 185 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 186 | bfd_elf_generic_reloc, /* special_function */ |
| 187 | "R_PPC64_ADDR16", /* name */ |
| 188 | FALSE, /* partial_inplace */ |
| 189 | 0, /* src_mask */ |
| 190 | 0xffff, /* dst_mask */ |
| 191 | FALSE), /* pcrel_offset */ |
| 192 | |
| 193 | /* A 16 bit relocation without overflow. */ |
| 194 | HOWTO (R_PPC64_ADDR16_LO, /* type */ |
| 195 | 0, /* rightshift */ |
| 196 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 197 | 16, /* bitsize */ |
| 198 | FALSE, /* pc_relative */ |
| 199 | 0, /* bitpos */ |
| 200 | complain_overflow_dont,/* complain_on_overflow */ |
| 201 | bfd_elf_generic_reloc, /* special_function */ |
| 202 | "R_PPC64_ADDR16_LO", /* name */ |
| 203 | FALSE, /* partial_inplace */ |
| 204 | 0, /* src_mask */ |
| 205 | 0xffff, /* dst_mask */ |
| 206 | FALSE), /* pcrel_offset */ |
| 207 | |
| 208 | /* Bits 16-31 of an address. */ |
| 209 | HOWTO (R_PPC64_ADDR16_HI, /* type */ |
| 210 | 16, /* rightshift */ |
| 211 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 212 | 16, /* bitsize */ |
| 213 | FALSE, /* pc_relative */ |
| 214 | 0, /* bitpos */ |
| 215 | complain_overflow_dont, /* complain_on_overflow */ |
| 216 | bfd_elf_generic_reloc, /* special_function */ |
| 217 | "R_PPC64_ADDR16_HI", /* name */ |
| 218 | FALSE, /* partial_inplace */ |
| 219 | 0, /* src_mask */ |
| 220 | 0xffff, /* dst_mask */ |
| 221 | FALSE), /* pcrel_offset */ |
| 222 | |
| 223 | /* Bits 16-31 of an address, plus 1 if the contents of the low 16 |
| 224 | bits, treated as a signed number, is negative. */ |
| 225 | HOWTO (R_PPC64_ADDR16_HA, /* type */ |
| 226 | 16, /* rightshift */ |
| 227 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 228 | 16, /* bitsize */ |
| 229 | FALSE, /* pc_relative */ |
| 230 | 0, /* bitpos */ |
| 231 | complain_overflow_dont, /* complain_on_overflow */ |
| 232 | ppc64_elf_ha_reloc, /* special_function */ |
| 233 | "R_PPC64_ADDR16_HA", /* name */ |
| 234 | FALSE, /* partial_inplace */ |
| 235 | 0, /* src_mask */ |
| 236 | 0xffff, /* dst_mask */ |
| 237 | FALSE), /* pcrel_offset */ |
| 238 | |
| 239 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 240 | FIXME: we don't check that, we just clear them. */ |
| 241 | HOWTO (R_PPC64_ADDR14, /* type */ |
| 242 | 0, /* rightshift */ |
| 243 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 244 | 16, /* bitsize */ |
| 245 | FALSE, /* pc_relative */ |
| 246 | 0, /* bitpos */ |
| 247 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 248 | bfd_elf_generic_reloc, /* special_function */ |
| 249 | "R_PPC64_ADDR14", /* name */ |
| 250 | FALSE, /* partial_inplace */ |
| 251 | 0, /* src_mask */ |
| 252 | 0x0000fffc, /* dst_mask */ |
| 253 | FALSE), /* pcrel_offset */ |
| 254 | |
| 255 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 256 | indicate that the branch is expected to be taken. The lower two |
| 257 | bits must be zero. */ |
| 258 | HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ |
| 259 | 0, /* rightshift */ |
| 260 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 261 | 16, /* bitsize */ |
| 262 | FALSE, /* pc_relative */ |
| 263 | 0, /* bitpos */ |
| 264 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 265 | ppc64_elf_brtaken_reloc, /* special_function */ |
| 266 | "R_PPC64_ADDR14_BRTAKEN",/* name */ |
| 267 | FALSE, /* partial_inplace */ |
| 268 | 0, /* src_mask */ |
| 269 | 0x0000fffc, /* dst_mask */ |
| 270 | FALSE), /* pcrel_offset */ |
| 271 | |
| 272 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 273 | indicate that the branch is not expected to be taken. The lower |
| 274 | two bits must be zero. */ |
| 275 | HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ |
| 276 | 0, /* rightshift */ |
| 277 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 278 | 16, /* bitsize */ |
| 279 | FALSE, /* pc_relative */ |
| 280 | 0, /* bitpos */ |
| 281 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 282 | ppc64_elf_brtaken_reloc, /* special_function */ |
| 283 | "R_PPC64_ADDR14_BRNTAKEN",/* name */ |
| 284 | FALSE, /* partial_inplace */ |
| 285 | 0, /* src_mask */ |
| 286 | 0x0000fffc, /* dst_mask */ |
| 287 | FALSE), /* pcrel_offset */ |
| 288 | |
| 289 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 290 | HOWTO (R_PPC64_REL24, /* type */ |
| 291 | 0, /* rightshift */ |
| 292 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 293 | 26, /* bitsize */ |
| 294 | TRUE, /* pc_relative */ |
| 295 | 0, /* bitpos */ |
| 296 | complain_overflow_signed, /* complain_on_overflow */ |
| 297 | bfd_elf_generic_reloc, /* special_function */ |
| 298 | "R_PPC64_REL24", /* name */ |
| 299 | FALSE, /* partial_inplace */ |
| 300 | 0, /* src_mask */ |
| 301 | 0x03fffffc, /* dst_mask */ |
| 302 | TRUE), /* pcrel_offset */ |
| 303 | |
| 304 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 305 | HOWTO (R_PPC64_REL14, /* type */ |
| 306 | 0, /* rightshift */ |
| 307 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 308 | 16, /* bitsize */ |
| 309 | TRUE, /* pc_relative */ |
| 310 | 0, /* bitpos */ |
| 311 | complain_overflow_signed, /* complain_on_overflow */ |
| 312 | bfd_elf_generic_reloc, /* special_function */ |
| 313 | "R_PPC64_REL14", /* name */ |
| 314 | FALSE, /* partial_inplace */ |
| 315 | 0, /* src_mask */ |
| 316 | 0x0000fffc, /* dst_mask */ |
| 317 | TRUE), /* pcrel_offset */ |
| 318 | |
| 319 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 320 | the branch is expected to be taken. The lower two bits must be |
| 321 | zero. */ |
| 322 | HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ |
| 323 | 0, /* rightshift */ |
| 324 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 325 | 16, /* bitsize */ |
| 326 | TRUE, /* pc_relative */ |
| 327 | 0, /* bitpos */ |
| 328 | complain_overflow_signed, /* complain_on_overflow */ |
| 329 | ppc64_elf_brtaken_reloc, /* special_function */ |
| 330 | "R_PPC64_REL14_BRTAKEN", /* name */ |
| 331 | FALSE, /* partial_inplace */ |
| 332 | 0, /* src_mask */ |
| 333 | 0x0000fffc, /* dst_mask */ |
| 334 | TRUE), /* pcrel_offset */ |
| 335 | |
| 336 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 337 | the branch is not expected to be taken. The lower two bits must |
| 338 | be zero. */ |
| 339 | HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ |
| 340 | 0, /* rightshift */ |
| 341 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 342 | 16, /* bitsize */ |
| 343 | TRUE, /* pc_relative */ |
| 344 | 0, /* bitpos */ |
| 345 | complain_overflow_signed, /* complain_on_overflow */ |
| 346 | ppc64_elf_brtaken_reloc, /* special_function */ |
| 347 | "R_PPC64_REL14_BRNTAKEN",/* name */ |
| 348 | FALSE, /* partial_inplace */ |
| 349 | 0, /* src_mask */ |
| 350 | 0x0000fffc, /* dst_mask */ |
| 351 | TRUE), /* pcrel_offset */ |
| 352 | |
| 353 | /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the |
| 354 | symbol. */ |
| 355 | HOWTO (R_PPC64_GOT16, /* type */ |
| 356 | 0, /* rightshift */ |
| 357 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 358 | 16, /* bitsize */ |
| 359 | FALSE, /* pc_relative */ |
| 360 | 0, /* bitpos */ |
| 361 | complain_overflow_signed, /* complain_on_overflow */ |
| 362 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 363 | "R_PPC64_GOT16", /* name */ |
| 364 | FALSE, /* partial_inplace */ |
| 365 | 0, /* src_mask */ |
| 366 | 0xffff, /* dst_mask */ |
| 367 | FALSE), /* pcrel_offset */ |
| 368 | |
| 369 | /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for |
| 370 | the symbol. */ |
| 371 | HOWTO (R_PPC64_GOT16_LO, /* type */ |
| 372 | 0, /* rightshift */ |
| 373 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 374 | 16, /* bitsize */ |
| 375 | FALSE, /* pc_relative */ |
| 376 | 0, /* bitpos */ |
| 377 | complain_overflow_dont, /* complain_on_overflow */ |
| 378 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 379 | "R_PPC64_GOT16_LO", /* name */ |
| 380 | FALSE, /* partial_inplace */ |
| 381 | 0, /* src_mask */ |
| 382 | 0xffff, /* dst_mask */ |
| 383 | FALSE), /* pcrel_offset */ |
| 384 | |
| 385 | /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for |
| 386 | the symbol. */ |
| 387 | HOWTO (R_PPC64_GOT16_HI, /* type */ |
| 388 | 16, /* rightshift */ |
| 389 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 390 | 16, /* bitsize */ |
| 391 | FALSE, /* pc_relative */ |
| 392 | 0, /* bitpos */ |
| 393 | complain_overflow_dont,/* complain_on_overflow */ |
| 394 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 395 | "R_PPC64_GOT16_HI", /* name */ |
| 396 | FALSE, /* partial_inplace */ |
| 397 | 0, /* src_mask */ |
| 398 | 0xffff, /* dst_mask */ |
| 399 | FALSE), /* pcrel_offset */ |
| 400 | |
| 401 | /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for |
| 402 | the symbol. */ |
| 403 | HOWTO (R_PPC64_GOT16_HA, /* type */ |
| 404 | 16, /* rightshift */ |
| 405 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 406 | 16, /* bitsize */ |
| 407 | FALSE, /* pc_relative */ |
| 408 | 0, /* bitpos */ |
| 409 | complain_overflow_dont,/* complain_on_overflow */ |
| 410 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 411 | "R_PPC64_GOT16_HA", /* name */ |
| 412 | FALSE, /* partial_inplace */ |
| 413 | 0, /* src_mask */ |
| 414 | 0xffff, /* dst_mask */ |
| 415 | FALSE), /* pcrel_offset */ |
| 416 | |
| 417 | /* This is used only by the dynamic linker. The symbol should exist |
| 418 | both in the object being run and in some shared library. The |
| 419 | dynamic linker copies the data addressed by the symbol from the |
| 420 | shared library into the object, because the object being |
| 421 | run has to have the data at some particular address. */ |
| 422 | HOWTO (R_PPC64_COPY, /* type */ |
| 423 | 0, /* rightshift */ |
| 424 | 0, /* this one is variable size */ |
| 425 | 0, /* bitsize */ |
| 426 | FALSE, /* pc_relative */ |
| 427 | 0, /* bitpos */ |
| 428 | complain_overflow_dont, /* complain_on_overflow */ |
| 429 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 430 | "R_PPC64_COPY", /* name */ |
| 431 | FALSE, /* partial_inplace */ |
| 432 | 0, /* src_mask */ |
| 433 | 0, /* dst_mask */ |
| 434 | FALSE), /* pcrel_offset */ |
| 435 | |
| 436 | /* Like R_PPC64_ADDR64, but used when setting global offset table |
| 437 | entries. */ |
| 438 | HOWTO (R_PPC64_GLOB_DAT, /* type */ |
| 439 | 0, /* rightshift */ |
| 440 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 441 | 64, /* bitsize */ |
| 442 | FALSE, /* pc_relative */ |
| 443 | 0, /* bitpos */ |
| 444 | complain_overflow_dont, /* complain_on_overflow */ |
| 445 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 446 | "R_PPC64_GLOB_DAT", /* name */ |
| 447 | FALSE, /* partial_inplace */ |
| 448 | 0, /* src_mask */ |
| 449 | ONES (64), /* dst_mask */ |
| 450 | FALSE), /* pcrel_offset */ |
| 451 | |
| 452 | /* Created by the link editor. Marks a procedure linkage table |
| 453 | entry for a symbol. */ |
| 454 | HOWTO (R_PPC64_JMP_SLOT, /* type */ |
| 455 | 0, /* rightshift */ |
| 456 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 457 | 0, /* bitsize */ |
| 458 | FALSE, /* pc_relative */ |
| 459 | 0, /* bitpos */ |
| 460 | complain_overflow_dont, /* complain_on_overflow */ |
| 461 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 462 | "R_PPC64_JMP_SLOT", /* name */ |
| 463 | FALSE, /* partial_inplace */ |
| 464 | 0, /* src_mask */ |
| 465 | 0, /* dst_mask */ |
| 466 | FALSE), /* pcrel_offset */ |
| 467 | |
| 468 | /* Used only by the dynamic linker. When the object is run, this |
| 469 | doubleword64 is set to the load address of the object, plus the |
| 470 | addend. */ |
| 471 | HOWTO (R_PPC64_RELATIVE, /* type */ |
| 472 | 0, /* rightshift */ |
| 473 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 474 | 64, /* bitsize */ |
| 475 | FALSE, /* pc_relative */ |
| 476 | 0, /* bitpos */ |
| 477 | complain_overflow_dont, /* complain_on_overflow */ |
| 478 | bfd_elf_generic_reloc, /* special_function */ |
| 479 | "R_PPC64_RELATIVE", /* name */ |
| 480 | FALSE, /* partial_inplace */ |
| 481 | 0, /* src_mask */ |
| 482 | ONES (64), /* dst_mask */ |
| 483 | FALSE), /* pcrel_offset */ |
| 484 | |
| 485 | /* Like R_PPC64_ADDR32, but may be unaligned. */ |
| 486 | HOWTO (R_PPC64_UADDR32, /* type */ |
| 487 | 0, /* rightshift */ |
| 488 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 489 | 32, /* bitsize */ |
| 490 | FALSE, /* pc_relative */ |
| 491 | 0, /* bitpos */ |
| 492 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 493 | bfd_elf_generic_reloc, /* special_function */ |
| 494 | "R_PPC64_UADDR32", /* name */ |
| 495 | FALSE, /* partial_inplace */ |
| 496 | 0, /* src_mask */ |
| 497 | 0xffffffff, /* dst_mask */ |
| 498 | FALSE), /* pcrel_offset */ |
| 499 | |
| 500 | /* Like R_PPC64_ADDR16, but may be unaligned. */ |
| 501 | HOWTO (R_PPC64_UADDR16, /* type */ |
| 502 | 0, /* rightshift */ |
| 503 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 504 | 16, /* bitsize */ |
| 505 | FALSE, /* pc_relative */ |
| 506 | 0, /* bitpos */ |
| 507 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 508 | bfd_elf_generic_reloc, /* special_function */ |
| 509 | "R_PPC64_UADDR16", /* name */ |
| 510 | FALSE, /* partial_inplace */ |
| 511 | 0, /* src_mask */ |
| 512 | 0xffff, /* dst_mask */ |
| 513 | FALSE), /* pcrel_offset */ |
| 514 | |
| 515 | /* 32-bit PC relative. */ |
| 516 | HOWTO (R_PPC64_REL32, /* type */ |
| 517 | 0, /* rightshift */ |
| 518 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 519 | 32, /* bitsize */ |
| 520 | TRUE, /* pc_relative */ |
| 521 | 0, /* bitpos */ |
| 522 | /* FIXME: Verify. Was complain_overflow_bitfield. */ |
| 523 | complain_overflow_signed, /* complain_on_overflow */ |
| 524 | bfd_elf_generic_reloc, /* special_function */ |
| 525 | "R_PPC64_REL32", /* name */ |
| 526 | FALSE, /* partial_inplace */ |
| 527 | 0, /* src_mask */ |
| 528 | 0xffffffff, /* dst_mask */ |
| 529 | TRUE), /* pcrel_offset */ |
| 530 | |
| 531 | /* 32-bit relocation to the symbol's procedure linkage table. */ |
| 532 | HOWTO (R_PPC64_PLT32, /* type */ |
| 533 | 0, /* rightshift */ |
| 534 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 535 | 32, /* bitsize */ |
| 536 | FALSE, /* pc_relative */ |
| 537 | 0, /* bitpos */ |
| 538 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 539 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 540 | "R_PPC64_PLT32", /* name */ |
| 541 | FALSE, /* partial_inplace */ |
| 542 | 0, /* src_mask */ |
| 543 | 0xffffffff, /* dst_mask */ |
| 544 | FALSE), /* pcrel_offset */ |
| 545 | |
| 546 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 547 | FIXME: R_PPC64_PLTREL32 not supported. */ |
| 548 | HOWTO (R_PPC64_PLTREL32, /* type */ |
| 549 | 0, /* rightshift */ |
| 550 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 551 | 32, /* bitsize */ |
| 552 | TRUE, /* pc_relative */ |
| 553 | 0, /* bitpos */ |
| 554 | complain_overflow_signed, /* complain_on_overflow */ |
| 555 | bfd_elf_generic_reloc, /* special_function */ |
| 556 | "R_PPC64_PLTREL32", /* name */ |
| 557 | FALSE, /* partial_inplace */ |
| 558 | 0, /* src_mask */ |
| 559 | 0xffffffff, /* dst_mask */ |
| 560 | TRUE), /* pcrel_offset */ |
| 561 | |
| 562 | /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for |
| 563 | the symbol. */ |
| 564 | HOWTO (R_PPC64_PLT16_LO, /* type */ |
| 565 | 0, /* rightshift */ |
| 566 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 567 | 16, /* bitsize */ |
| 568 | FALSE, /* pc_relative */ |
| 569 | 0, /* bitpos */ |
| 570 | complain_overflow_dont, /* complain_on_overflow */ |
| 571 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 572 | "R_PPC64_PLT16_LO", /* name */ |
| 573 | FALSE, /* partial_inplace */ |
| 574 | 0, /* src_mask */ |
| 575 | 0xffff, /* dst_mask */ |
| 576 | FALSE), /* pcrel_offset */ |
| 577 | |
| 578 | /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for |
| 579 | the symbol. */ |
| 580 | HOWTO (R_PPC64_PLT16_HI, /* type */ |
| 581 | 16, /* rightshift */ |
| 582 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 583 | 16, /* bitsize */ |
| 584 | FALSE, /* pc_relative */ |
| 585 | 0, /* bitpos */ |
| 586 | complain_overflow_dont, /* complain_on_overflow */ |
| 587 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 588 | "R_PPC64_PLT16_HI", /* name */ |
| 589 | FALSE, /* partial_inplace */ |
| 590 | 0, /* src_mask */ |
| 591 | 0xffff, /* dst_mask */ |
| 592 | FALSE), /* pcrel_offset */ |
| 593 | |
| 594 | /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for |
| 595 | the symbol. */ |
| 596 | HOWTO (R_PPC64_PLT16_HA, /* type */ |
| 597 | 16, /* rightshift */ |
| 598 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 599 | 16, /* bitsize */ |
| 600 | FALSE, /* pc_relative */ |
| 601 | 0, /* bitpos */ |
| 602 | complain_overflow_dont, /* complain_on_overflow */ |
| 603 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 604 | "R_PPC64_PLT16_HA", /* name */ |
| 605 | FALSE, /* partial_inplace */ |
| 606 | 0, /* src_mask */ |
| 607 | 0xffff, /* dst_mask */ |
| 608 | FALSE), /* pcrel_offset */ |
| 609 | |
| 610 | /* 16-bit section relative relocation. */ |
| 611 | HOWTO (R_PPC64_SECTOFF, /* type */ |
| 612 | 0, /* rightshift */ |
| 613 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 614 | 16, /* bitsize */ |
| 615 | FALSE, /* pc_relative */ |
| 616 | 0, /* bitpos */ |
| 617 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 618 | ppc64_elf_sectoff_reloc, /* special_function */ |
| 619 | "R_PPC64_SECTOFF", /* name */ |
| 620 | FALSE, /* partial_inplace */ |
| 621 | 0, /* src_mask */ |
| 622 | 0xffff, /* dst_mask */ |
| 623 | FALSE), /* pcrel_offset */ |
| 624 | |
| 625 | /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
| 626 | HOWTO (R_PPC64_SECTOFF_LO, /* type */ |
| 627 | 0, /* rightshift */ |
| 628 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 629 | 16, /* bitsize */ |
| 630 | FALSE, /* pc_relative */ |
| 631 | 0, /* bitpos */ |
| 632 | complain_overflow_dont, /* complain_on_overflow */ |
| 633 | ppc64_elf_sectoff_reloc, /* special_function */ |
| 634 | "R_PPC64_SECTOFF_LO", /* name */ |
| 635 | FALSE, /* partial_inplace */ |
| 636 | 0, /* src_mask */ |
| 637 | 0xffff, /* dst_mask */ |
| 638 | FALSE), /* pcrel_offset */ |
| 639 | |
| 640 | /* 16-bit upper half section relative relocation. */ |
| 641 | HOWTO (R_PPC64_SECTOFF_HI, /* type */ |
| 642 | 16, /* rightshift */ |
| 643 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 644 | 16, /* bitsize */ |
| 645 | FALSE, /* pc_relative */ |
| 646 | 0, /* bitpos */ |
| 647 | complain_overflow_dont, /* complain_on_overflow */ |
| 648 | ppc64_elf_sectoff_reloc, /* special_function */ |
| 649 | "R_PPC64_SECTOFF_HI", /* name */ |
| 650 | FALSE, /* partial_inplace */ |
| 651 | 0, /* src_mask */ |
| 652 | 0xffff, /* dst_mask */ |
| 653 | FALSE), /* pcrel_offset */ |
| 654 | |
| 655 | /* 16-bit upper half adjusted section relative relocation. */ |
| 656 | HOWTO (R_PPC64_SECTOFF_HA, /* type */ |
| 657 | 16, /* rightshift */ |
| 658 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 659 | 16, /* bitsize */ |
| 660 | FALSE, /* pc_relative */ |
| 661 | 0, /* bitpos */ |
| 662 | complain_overflow_dont, /* complain_on_overflow */ |
| 663 | ppc64_elf_sectoff_ha_reloc, /* special_function */ |
| 664 | "R_PPC64_SECTOFF_HA", /* name */ |
| 665 | FALSE, /* partial_inplace */ |
| 666 | 0, /* src_mask */ |
| 667 | 0xffff, /* dst_mask */ |
| 668 | FALSE), /* pcrel_offset */ |
| 669 | |
| 670 | /* Like R_PPC64_REL24 without touching the two least significant |
| 671 | bits. Should have been named R_PPC64_REL30! */ |
| 672 | HOWTO (R_PPC64_ADDR30, /* type */ |
| 673 | 2, /* rightshift */ |
| 674 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 675 | 30, /* bitsize */ |
| 676 | TRUE, /* pc_relative */ |
| 677 | 0, /* bitpos */ |
| 678 | complain_overflow_dont, /* complain_on_overflow */ |
| 679 | bfd_elf_generic_reloc, /* special_function */ |
| 680 | "R_PPC64_ADDR30", /* name */ |
| 681 | FALSE, /* partial_inplace */ |
| 682 | 0, /* src_mask */ |
| 683 | 0xfffffffc, /* dst_mask */ |
| 684 | TRUE), /* pcrel_offset */ |
| 685 | |
| 686 | /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ |
| 687 | |
| 688 | /* A standard 64-bit relocation. */ |
| 689 | HOWTO (R_PPC64_ADDR64, /* type */ |
| 690 | 0, /* rightshift */ |
| 691 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 692 | 64, /* bitsize */ |
| 693 | FALSE, /* pc_relative */ |
| 694 | 0, /* bitpos */ |
| 695 | complain_overflow_dont, /* complain_on_overflow */ |
| 696 | bfd_elf_generic_reloc, /* special_function */ |
| 697 | "R_PPC64_ADDR64", /* name */ |
| 698 | FALSE, /* partial_inplace */ |
| 699 | 0, /* src_mask */ |
| 700 | ONES (64), /* dst_mask */ |
| 701 | FALSE), /* pcrel_offset */ |
| 702 | |
| 703 | /* The bits 32-47 of an address. */ |
| 704 | HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ |
| 705 | 32, /* rightshift */ |
| 706 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 707 | 16, /* bitsize */ |
| 708 | FALSE, /* pc_relative */ |
| 709 | 0, /* bitpos */ |
| 710 | complain_overflow_dont, /* complain_on_overflow */ |
| 711 | bfd_elf_generic_reloc, /* special_function */ |
| 712 | "R_PPC64_ADDR16_HIGHER", /* name */ |
| 713 | FALSE, /* partial_inplace */ |
| 714 | 0, /* src_mask */ |
| 715 | 0xffff, /* dst_mask */ |
| 716 | FALSE), /* pcrel_offset */ |
| 717 | |
| 718 | /* The bits 32-47 of an address, plus 1 if the contents of the low |
| 719 | 16 bits, treated as a signed number, is negative. */ |
| 720 | HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ |
| 721 | 32, /* rightshift */ |
| 722 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 723 | 16, /* bitsize */ |
| 724 | FALSE, /* pc_relative */ |
| 725 | 0, /* bitpos */ |
| 726 | complain_overflow_dont, /* complain_on_overflow */ |
| 727 | ppc64_elf_ha_reloc, /* special_function */ |
| 728 | "R_PPC64_ADDR16_HIGHERA", /* name */ |
| 729 | FALSE, /* partial_inplace */ |
| 730 | 0, /* src_mask */ |
| 731 | 0xffff, /* dst_mask */ |
| 732 | FALSE), /* pcrel_offset */ |
| 733 | |
| 734 | /* The bits 48-63 of an address. */ |
| 735 | HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ |
| 736 | 48, /* rightshift */ |
| 737 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 738 | 16, /* bitsize */ |
| 739 | FALSE, /* pc_relative */ |
| 740 | 0, /* bitpos */ |
| 741 | complain_overflow_dont, /* complain_on_overflow */ |
| 742 | bfd_elf_generic_reloc, /* special_function */ |
| 743 | "R_PPC64_ADDR16_HIGHEST", /* name */ |
| 744 | FALSE, /* partial_inplace */ |
| 745 | 0, /* src_mask */ |
| 746 | 0xffff, /* dst_mask */ |
| 747 | FALSE), /* pcrel_offset */ |
| 748 | |
| 749 | /* The bits 48-63 of an address, plus 1 if the contents of the low |
| 750 | 16 bits, treated as a signed number, is negative. */ |
| 751 | HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ |
| 752 | 48, /* rightshift */ |
| 753 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 754 | 16, /* bitsize */ |
| 755 | FALSE, /* pc_relative */ |
| 756 | 0, /* bitpos */ |
| 757 | complain_overflow_dont, /* complain_on_overflow */ |
| 758 | ppc64_elf_ha_reloc, /* special_function */ |
| 759 | "R_PPC64_ADDR16_HIGHESTA", /* name */ |
| 760 | FALSE, /* partial_inplace */ |
| 761 | 0, /* src_mask */ |
| 762 | 0xffff, /* dst_mask */ |
| 763 | FALSE), /* pcrel_offset */ |
| 764 | |
| 765 | /* Like ADDR64, but may be unaligned. */ |
| 766 | HOWTO (R_PPC64_UADDR64, /* type */ |
| 767 | 0, /* rightshift */ |
| 768 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 769 | 64, /* bitsize */ |
| 770 | FALSE, /* pc_relative */ |
| 771 | 0, /* bitpos */ |
| 772 | complain_overflow_dont, /* complain_on_overflow */ |
| 773 | bfd_elf_generic_reloc, /* special_function */ |
| 774 | "R_PPC64_UADDR64", /* name */ |
| 775 | FALSE, /* partial_inplace */ |
| 776 | 0, /* src_mask */ |
| 777 | ONES (64), /* dst_mask */ |
| 778 | FALSE), /* pcrel_offset */ |
| 779 | |
| 780 | /* 64-bit relative relocation. */ |
| 781 | HOWTO (R_PPC64_REL64, /* type */ |
| 782 | 0, /* rightshift */ |
| 783 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 784 | 64, /* bitsize */ |
| 785 | TRUE, /* pc_relative */ |
| 786 | 0, /* bitpos */ |
| 787 | complain_overflow_dont, /* complain_on_overflow */ |
| 788 | bfd_elf_generic_reloc, /* special_function */ |
| 789 | "R_PPC64_REL64", /* name */ |
| 790 | FALSE, /* partial_inplace */ |
| 791 | 0, /* src_mask */ |
| 792 | ONES (64), /* dst_mask */ |
| 793 | TRUE), /* pcrel_offset */ |
| 794 | |
| 795 | /* 64-bit relocation to the symbol's procedure linkage table. */ |
| 796 | HOWTO (R_PPC64_PLT64, /* type */ |
| 797 | 0, /* rightshift */ |
| 798 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 799 | 64, /* bitsize */ |
| 800 | FALSE, /* pc_relative */ |
| 801 | 0, /* bitpos */ |
| 802 | complain_overflow_dont, /* complain_on_overflow */ |
| 803 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 804 | "R_PPC64_PLT64", /* name */ |
| 805 | FALSE, /* partial_inplace */ |
| 806 | 0, /* src_mask */ |
| 807 | ONES (64), /* dst_mask */ |
| 808 | FALSE), /* pcrel_offset */ |
| 809 | |
| 810 | /* 64-bit PC relative relocation to the symbol's procedure linkage |
| 811 | table. */ |
| 812 | /* FIXME: R_PPC64_PLTREL64 not supported. */ |
| 813 | HOWTO (R_PPC64_PLTREL64, /* type */ |
| 814 | 0, /* rightshift */ |
| 815 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 816 | 64, /* bitsize */ |
| 817 | TRUE, /* pc_relative */ |
| 818 | 0, /* bitpos */ |
| 819 | complain_overflow_dont, /* complain_on_overflow */ |
| 820 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 821 | "R_PPC64_PLTREL64", /* name */ |
| 822 | FALSE, /* partial_inplace */ |
| 823 | 0, /* src_mask */ |
| 824 | ONES (64), /* dst_mask */ |
| 825 | TRUE), /* pcrel_offset */ |
| 826 | |
| 827 | /* 16 bit TOC-relative relocation. */ |
| 828 | |
| 829 | /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ |
| 830 | HOWTO (R_PPC64_TOC16, /* type */ |
| 831 | 0, /* rightshift */ |
| 832 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 833 | 16, /* bitsize */ |
| 834 | FALSE, /* pc_relative */ |
| 835 | 0, /* bitpos */ |
| 836 | complain_overflow_signed, /* complain_on_overflow */ |
| 837 | ppc64_elf_toc_reloc, /* special_function */ |
| 838 | "R_PPC64_TOC16", /* name */ |
| 839 | FALSE, /* partial_inplace */ |
| 840 | 0, /* src_mask */ |
| 841 | 0xffff, /* dst_mask */ |
| 842 | FALSE), /* pcrel_offset */ |
| 843 | |
| 844 | /* 16 bit TOC-relative relocation without overflow. */ |
| 845 | |
| 846 | /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ |
| 847 | HOWTO (R_PPC64_TOC16_LO, /* type */ |
| 848 | 0, /* rightshift */ |
| 849 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 850 | 16, /* bitsize */ |
| 851 | FALSE, /* pc_relative */ |
| 852 | 0, /* bitpos */ |
| 853 | complain_overflow_dont, /* complain_on_overflow */ |
| 854 | ppc64_elf_toc_reloc, /* special_function */ |
| 855 | "R_PPC64_TOC16_LO", /* name */ |
| 856 | FALSE, /* partial_inplace */ |
| 857 | 0, /* src_mask */ |
| 858 | 0xffff, /* dst_mask */ |
| 859 | FALSE), /* pcrel_offset */ |
| 860 | |
| 861 | /* 16 bit TOC-relative relocation, high 16 bits. */ |
| 862 | |
| 863 | /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ |
| 864 | HOWTO (R_PPC64_TOC16_HI, /* type */ |
| 865 | 16, /* rightshift */ |
| 866 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 867 | 16, /* bitsize */ |
| 868 | FALSE, /* pc_relative */ |
| 869 | 0, /* bitpos */ |
| 870 | complain_overflow_dont, /* complain_on_overflow */ |
| 871 | ppc64_elf_toc_reloc, /* special_function */ |
| 872 | "R_PPC64_TOC16_HI", /* name */ |
| 873 | FALSE, /* partial_inplace */ |
| 874 | 0, /* src_mask */ |
| 875 | 0xffff, /* dst_mask */ |
| 876 | FALSE), /* pcrel_offset */ |
| 877 | |
| 878 | /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the |
| 879 | contents of the low 16 bits, treated as a signed number, is |
| 880 | negative. */ |
| 881 | |
| 882 | /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ |
| 883 | HOWTO (R_PPC64_TOC16_HA, /* type */ |
| 884 | 16, /* rightshift */ |
| 885 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 886 | 16, /* bitsize */ |
| 887 | FALSE, /* pc_relative */ |
| 888 | 0, /* bitpos */ |
| 889 | complain_overflow_dont, /* complain_on_overflow */ |
| 890 | ppc64_elf_toc_ha_reloc, /* special_function */ |
| 891 | "R_PPC64_TOC16_HA", /* name */ |
| 892 | FALSE, /* partial_inplace */ |
| 893 | 0, /* src_mask */ |
| 894 | 0xffff, /* dst_mask */ |
| 895 | FALSE), /* pcrel_offset */ |
| 896 | |
| 897 | /* 64-bit relocation; insert value of TOC base (.TOC.). */ |
| 898 | |
| 899 | /* R_PPC64_TOC 51 doubleword64 .TOC. */ |
| 900 | HOWTO (R_PPC64_TOC, /* type */ |
| 901 | 0, /* rightshift */ |
| 902 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 903 | 64, /* bitsize */ |
| 904 | FALSE, /* pc_relative */ |
| 905 | 0, /* bitpos */ |
| 906 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 907 | ppc64_elf_toc64_reloc, /* special_function */ |
| 908 | "R_PPC64_TOC", /* name */ |
| 909 | FALSE, /* partial_inplace */ |
| 910 | 0, /* src_mask */ |
| 911 | ONES (64), /* dst_mask */ |
| 912 | FALSE), /* pcrel_offset */ |
| 913 | |
| 914 | /* Like R_PPC64_GOT16, but also informs the link editor that the |
| 915 | value to relocate may (!) refer to a PLT entry which the link |
| 916 | editor (a) may replace with the symbol value. If the link editor |
| 917 | is unable to fully resolve the symbol, it may (b) create a PLT |
| 918 | entry and store the address to the new PLT entry in the GOT. |
| 919 | This permits lazy resolution of function symbols at run time. |
| 920 | The link editor may also skip all of this and just (c) emit a |
| 921 | R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ |
| 922 | /* FIXME: R_PPC64_PLTGOT16 not implemented. */ |
| 923 | HOWTO (R_PPC64_PLTGOT16, /* type */ |
| 924 | 0, /* rightshift */ |
| 925 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 926 | 16, /* bitsize */ |
| 927 | FALSE, /* pc_relative */ |
| 928 | 0, /* bitpos */ |
| 929 | complain_overflow_signed, /* complain_on_overflow */ |
| 930 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 931 | "R_PPC64_PLTGOT16", /* name */ |
| 932 | FALSE, /* partial_inplace */ |
| 933 | 0, /* src_mask */ |
| 934 | 0xffff, /* dst_mask */ |
| 935 | FALSE), /* pcrel_offset */ |
| 936 | |
| 937 | /* Like R_PPC64_PLTGOT16, but without overflow. */ |
| 938 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| 939 | HOWTO (R_PPC64_PLTGOT16_LO, /* type */ |
| 940 | 0, /* rightshift */ |
| 941 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 942 | 16, /* bitsize */ |
| 943 | FALSE, /* pc_relative */ |
| 944 | 0, /* bitpos */ |
| 945 | complain_overflow_dont, /* complain_on_overflow */ |
| 946 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 947 | "R_PPC64_PLTGOT16_LO", /* name */ |
| 948 | FALSE, /* partial_inplace */ |
| 949 | 0, /* src_mask */ |
| 950 | 0xffff, /* dst_mask */ |
| 951 | FALSE), /* pcrel_offset */ |
| 952 | |
| 953 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ |
| 954 | /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ |
| 955 | HOWTO (R_PPC64_PLTGOT16_HI, /* type */ |
| 956 | 16, /* rightshift */ |
| 957 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 958 | 16, /* bitsize */ |
| 959 | FALSE, /* pc_relative */ |
| 960 | 0, /* bitpos */ |
| 961 | complain_overflow_dont, /* complain_on_overflow */ |
| 962 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 963 | "R_PPC64_PLTGOT16_HI", /* name */ |
| 964 | FALSE, /* partial_inplace */ |
| 965 | 0, /* src_mask */ |
| 966 | 0xffff, /* dst_mask */ |
| 967 | FALSE), /* pcrel_offset */ |
| 968 | |
| 969 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus |
| 970 | 1 if the contents of the low 16 bits, treated as a signed number, |
| 971 | is negative. */ |
| 972 | /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ |
| 973 | HOWTO (R_PPC64_PLTGOT16_HA, /* type */ |
| 974 | 16, /* rightshift */ |
| 975 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 976 | 16, /* bitsize */ |
| 977 | FALSE, /* pc_relative */ |
| 978 | 0, /* bitpos */ |
| 979 | complain_overflow_dont,/* complain_on_overflow */ |
| 980 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 981 | "R_PPC64_PLTGOT16_HA", /* name */ |
| 982 | FALSE, /* partial_inplace */ |
| 983 | 0, /* src_mask */ |
| 984 | 0xffff, /* dst_mask */ |
| 985 | FALSE), /* pcrel_offset */ |
| 986 | |
| 987 | /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ |
| 988 | HOWTO (R_PPC64_ADDR16_DS, /* type */ |
| 989 | 0, /* rightshift */ |
| 990 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 991 | 16, /* bitsize */ |
| 992 | FALSE, /* pc_relative */ |
| 993 | 0, /* bitpos */ |
| 994 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 995 | bfd_elf_generic_reloc, /* special_function */ |
| 996 | "R_PPC64_ADDR16_DS", /* name */ |
| 997 | FALSE, /* partial_inplace */ |
| 998 | 0, /* src_mask */ |
| 999 | 0xfffc, /* dst_mask */ |
| 1000 | FALSE), /* pcrel_offset */ |
| 1001 | |
| 1002 | /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ |
| 1003 | HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ |
| 1004 | 0, /* rightshift */ |
| 1005 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1006 | 16, /* bitsize */ |
| 1007 | FALSE, /* pc_relative */ |
| 1008 | 0, /* bitpos */ |
| 1009 | complain_overflow_dont,/* complain_on_overflow */ |
| 1010 | bfd_elf_generic_reloc, /* special_function */ |
| 1011 | "R_PPC64_ADDR16_LO_DS",/* name */ |
| 1012 | FALSE, /* partial_inplace */ |
| 1013 | 0, /* src_mask */ |
| 1014 | 0xfffc, /* dst_mask */ |
| 1015 | FALSE), /* pcrel_offset */ |
| 1016 | |
| 1017 | /* Like R_PPC64_GOT16, but for instructions with a DS field. */ |
| 1018 | HOWTO (R_PPC64_GOT16_DS, /* type */ |
| 1019 | 0, /* rightshift */ |
| 1020 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1021 | 16, /* bitsize */ |
| 1022 | FALSE, /* pc_relative */ |
| 1023 | 0, /* bitpos */ |
| 1024 | complain_overflow_signed, /* complain_on_overflow */ |
| 1025 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 1026 | "R_PPC64_GOT16_DS", /* name */ |
| 1027 | FALSE, /* partial_inplace */ |
| 1028 | 0, /* src_mask */ |
| 1029 | 0xfffc, /* dst_mask */ |
| 1030 | FALSE), /* pcrel_offset */ |
| 1031 | |
| 1032 | /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ |
| 1033 | HOWTO (R_PPC64_GOT16_LO_DS, /* type */ |
| 1034 | 0, /* rightshift */ |
| 1035 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1036 | 16, /* bitsize */ |
| 1037 | FALSE, /* pc_relative */ |
| 1038 | 0, /* bitpos */ |
| 1039 | complain_overflow_dont, /* complain_on_overflow */ |
| 1040 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 1041 | "R_PPC64_GOT16_LO_DS", /* name */ |
| 1042 | FALSE, /* partial_inplace */ |
| 1043 | 0, /* src_mask */ |
| 1044 | 0xfffc, /* dst_mask */ |
| 1045 | FALSE), /* pcrel_offset */ |
| 1046 | |
| 1047 | /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ |
| 1048 | HOWTO (R_PPC64_PLT16_LO_DS, /* type */ |
| 1049 | 0, /* rightshift */ |
| 1050 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1051 | 16, /* bitsize */ |
| 1052 | FALSE, /* pc_relative */ |
| 1053 | 0, /* bitpos */ |
| 1054 | complain_overflow_dont, /* complain_on_overflow */ |
| 1055 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 1056 | "R_PPC64_PLT16_LO_DS", /* name */ |
| 1057 | FALSE, /* partial_inplace */ |
| 1058 | 0, /* src_mask */ |
| 1059 | 0xfffc, /* dst_mask */ |
| 1060 | FALSE), /* pcrel_offset */ |
| 1061 | |
| 1062 | /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ |
| 1063 | HOWTO (R_PPC64_SECTOFF_DS, /* type */ |
| 1064 | 0, /* rightshift */ |
| 1065 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1066 | 16, /* bitsize */ |
| 1067 | FALSE, /* pc_relative */ |
| 1068 | 0, /* bitpos */ |
| 1069 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1070 | ppc64_elf_sectoff_reloc, /* special_function */ |
| 1071 | "R_PPC64_SECTOFF_DS", /* name */ |
| 1072 | FALSE, /* partial_inplace */ |
| 1073 | 0, /* src_mask */ |
| 1074 | 0xfffc, /* dst_mask */ |
| 1075 | FALSE), /* pcrel_offset */ |
| 1076 | |
| 1077 | /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ |
| 1078 | HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ |
| 1079 | 0, /* rightshift */ |
| 1080 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1081 | 16, /* bitsize */ |
| 1082 | FALSE, /* pc_relative */ |
| 1083 | 0, /* bitpos */ |
| 1084 | complain_overflow_dont, /* complain_on_overflow */ |
| 1085 | ppc64_elf_sectoff_reloc, /* special_function */ |
| 1086 | "R_PPC64_SECTOFF_LO_DS",/* name */ |
| 1087 | FALSE, /* partial_inplace */ |
| 1088 | 0, /* src_mask */ |
| 1089 | 0xfffc, /* dst_mask */ |
| 1090 | FALSE), /* pcrel_offset */ |
| 1091 | |
| 1092 | /* Like R_PPC64_TOC16, but for instructions with a DS field. */ |
| 1093 | HOWTO (R_PPC64_TOC16_DS, /* type */ |
| 1094 | 0, /* rightshift */ |
| 1095 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1096 | 16, /* bitsize */ |
| 1097 | FALSE, /* pc_relative */ |
| 1098 | 0, /* bitpos */ |
| 1099 | complain_overflow_signed, /* complain_on_overflow */ |
| 1100 | ppc64_elf_toc_reloc, /* special_function */ |
| 1101 | "R_PPC64_TOC16_DS", /* name */ |
| 1102 | FALSE, /* partial_inplace */ |
| 1103 | 0, /* src_mask */ |
| 1104 | 0xfffc, /* dst_mask */ |
| 1105 | FALSE), /* pcrel_offset */ |
| 1106 | |
| 1107 | /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ |
| 1108 | HOWTO (R_PPC64_TOC16_LO_DS, /* type */ |
| 1109 | 0, /* rightshift */ |
| 1110 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1111 | 16, /* bitsize */ |
| 1112 | FALSE, /* pc_relative */ |
| 1113 | 0, /* bitpos */ |
| 1114 | complain_overflow_dont, /* complain_on_overflow */ |
| 1115 | ppc64_elf_toc_reloc, /* special_function */ |
| 1116 | "R_PPC64_TOC16_LO_DS", /* name */ |
| 1117 | FALSE, /* partial_inplace */ |
| 1118 | 0, /* src_mask */ |
| 1119 | 0xfffc, /* dst_mask */ |
| 1120 | FALSE), /* pcrel_offset */ |
| 1121 | |
| 1122 | /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ |
| 1123 | /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ |
| 1124 | HOWTO (R_PPC64_PLTGOT16_DS, /* type */ |
| 1125 | 0, /* rightshift */ |
| 1126 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1127 | 16, /* bitsize */ |
| 1128 | FALSE, /* pc_relative */ |
| 1129 | 0, /* bitpos */ |
| 1130 | complain_overflow_signed, /* complain_on_overflow */ |
| 1131 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 1132 | "R_PPC64_PLTGOT16_DS", /* name */ |
| 1133 | FALSE, /* partial_inplace */ |
| 1134 | 0, /* src_mask */ |
| 1135 | 0xfffc, /* dst_mask */ |
| 1136 | FALSE), /* pcrel_offset */ |
| 1137 | |
| 1138 | /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ |
| 1139 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| 1140 | HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ |
| 1141 | 0, /* rightshift */ |
| 1142 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1143 | 16, /* bitsize */ |
| 1144 | FALSE, /* pc_relative */ |
| 1145 | 0, /* bitpos */ |
| 1146 | complain_overflow_dont, /* complain_on_overflow */ |
| 1147 | ppc64_elf_unhandled_reloc, /* special_function */ |
| 1148 | "R_PPC64_PLTGOT16_LO_DS",/* name */ |
| 1149 | FALSE, /* partial_inplace */ |
| 1150 | 0, /* src_mask */ |
| 1151 | 0xfffc, /* dst_mask */ |
| 1152 | FALSE), /* pcrel_offset */ |
| 1153 | |
| 1154 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1155 | HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ |
| 1156 | 0, /* rightshift */ |
| 1157 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1158 | 0, /* bitsize */ |
| 1159 | FALSE, /* pc_relative */ |
| 1160 | 0, /* bitpos */ |
| 1161 | complain_overflow_dont, /* complain_on_overflow */ |
| 1162 | NULL, /* special_function */ |
| 1163 | "R_PPC64_GNU_VTINHERIT", /* name */ |
| 1164 | FALSE, /* partial_inplace */ |
| 1165 | 0, /* src_mask */ |
| 1166 | 0, /* dst_mask */ |
| 1167 | FALSE), /* pcrel_offset */ |
| 1168 | |
| 1169 | /* GNU extension to record C++ vtable member usage. */ |
| 1170 | HOWTO (R_PPC64_GNU_VTENTRY, /* type */ |
| 1171 | 0, /* rightshift */ |
| 1172 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1173 | 0, /* bitsize */ |
| 1174 | FALSE, /* pc_relative */ |
| 1175 | 0, /* bitpos */ |
| 1176 | complain_overflow_dont, /* complain_on_overflow */ |
| 1177 | NULL, /* special_function */ |
| 1178 | "R_PPC64_GNU_VTENTRY", /* name */ |
| 1179 | FALSE, /* partial_inplace */ |
| 1180 | 0, /* src_mask */ |
| 1181 | 0, /* dst_mask */ |
| 1182 | FALSE), /* pcrel_offset */ |
| 1183 | }; |
| 1184 | |
| 1185 | \f |
| 1186 | /* Initialize the ppc64_elf_howto_table, so that linear accesses can |
| 1187 | be done. */ |
| 1188 | |
| 1189 | static void |
| 1190 | ppc_howto_init () |
| 1191 | { |
| 1192 | unsigned int i, type; |
| 1193 | |
| 1194 | for (i = 0; |
| 1195 | i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); |
| 1196 | i++) |
| 1197 | { |
| 1198 | type = ppc64_elf_howto_raw[i].type; |
| 1199 | BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) |
| 1200 | / sizeof (ppc64_elf_howto_table[0]))); |
| 1201 | ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; |
| 1202 | } |
| 1203 | } |
| 1204 | |
| 1205 | static reloc_howto_type * |
| 1206 | ppc64_elf_reloc_type_lookup (abfd, code) |
| 1207 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1208 | bfd_reloc_code_real_type code; |
| 1209 | { |
| 1210 | enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE; |
| 1211 | |
| 1212 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 1213 | /* Initialize howto table if needed. */ |
| 1214 | ppc_howto_init (); |
| 1215 | |
| 1216 | switch ((int) code) |
| 1217 | { |
| 1218 | default: |
| 1219 | return (reloc_howto_type *) NULL; |
| 1220 | |
| 1221 | case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE; |
| 1222 | break; |
| 1223 | case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32; |
| 1224 | break; |
| 1225 | case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24; |
| 1226 | break; |
| 1227 | case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16; |
| 1228 | break; |
| 1229 | case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO; |
| 1230 | break; |
| 1231 | case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI; |
| 1232 | break; |
| 1233 | case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA; |
| 1234 | break; |
| 1235 | case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14; |
| 1236 | break; |
| 1237 | case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN; |
| 1238 | break; |
| 1239 | case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN; |
| 1240 | break; |
| 1241 | case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24; |
| 1242 | break; |
| 1243 | case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14; |
| 1244 | break; |
| 1245 | case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN; |
| 1246 | break; |
| 1247 | case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN; |
| 1248 | break; |
| 1249 | case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16; |
| 1250 | break; |
| 1251 | case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO; |
| 1252 | break; |
| 1253 | case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI; |
| 1254 | break; |
| 1255 | case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA; |
| 1256 | break; |
| 1257 | case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY; |
| 1258 | break; |
| 1259 | case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT; |
| 1260 | break; |
| 1261 | case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32; |
| 1262 | break; |
| 1263 | case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32; |
| 1264 | break; |
| 1265 | case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32; |
| 1266 | break; |
| 1267 | case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO; |
| 1268 | break; |
| 1269 | case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI; |
| 1270 | break; |
| 1271 | case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA; |
| 1272 | break; |
| 1273 | case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF; |
| 1274 | break; |
| 1275 | case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO; |
| 1276 | break; |
| 1277 | case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI; |
| 1278 | break; |
| 1279 | case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA; |
| 1280 | break; |
| 1281 | case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64; |
| 1282 | break; |
| 1283 | case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64; |
| 1284 | break; |
| 1285 | case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER; |
| 1286 | break; |
| 1287 | case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA; |
| 1288 | break; |
| 1289 | case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST; |
| 1290 | break; |
| 1291 | case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA; |
| 1292 | break; |
| 1293 | case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64; |
| 1294 | break; |
| 1295 | case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64; |
| 1296 | break; |
| 1297 | case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64; |
| 1298 | break; |
| 1299 | case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16; |
| 1300 | break; |
| 1301 | case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO; |
| 1302 | break; |
| 1303 | case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI; |
| 1304 | break; |
| 1305 | case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA; |
| 1306 | break; |
| 1307 | case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC; |
| 1308 | break; |
| 1309 | case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16; |
| 1310 | break; |
| 1311 | case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO; |
| 1312 | break; |
| 1313 | case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI; |
| 1314 | break; |
| 1315 | case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA; |
| 1316 | break; |
| 1317 | case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS; |
| 1318 | break; |
| 1319 | case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS; |
| 1320 | break; |
| 1321 | case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS; |
| 1322 | break; |
| 1323 | case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS; |
| 1324 | break; |
| 1325 | case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS; |
| 1326 | break; |
| 1327 | case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS; |
| 1328 | break; |
| 1329 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS; |
| 1330 | break; |
| 1331 | case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS; |
| 1332 | break; |
| 1333 | case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS; |
| 1334 | break; |
| 1335 | case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS; |
| 1336 | break; |
| 1337 | case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS; |
| 1338 | break; |
| 1339 | case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT; |
| 1340 | break; |
| 1341 | case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY; |
| 1342 | break; |
| 1343 | } |
| 1344 | |
| 1345 | return ppc64_elf_howto_table[(int) ppc_reloc]; |
| 1346 | }; |
| 1347 | |
| 1348 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1349 | |
| 1350 | static void |
| 1351 | ppc64_elf_info_to_howto (abfd, cache_ptr, dst) |
| 1352 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1353 | arelent *cache_ptr; |
| 1354 | Elf_Internal_Rela *dst; |
| 1355 | { |
| 1356 | unsigned int type; |
| 1357 | |
| 1358 | /* Initialize howto table if needed. */ |
| 1359 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 1360 | ppc_howto_init (); |
| 1361 | |
| 1362 | type = ELF64_R_TYPE (dst->r_info); |
| 1363 | BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) |
| 1364 | / sizeof (ppc64_elf_howto_table[0]))); |
| 1365 | cache_ptr->howto = ppc64_elf_howto_table[type]; |
| 1366 | } |
| 1367 | |
| 1368 | /* Handle the R_PPC_ADDR16_HA and similar relocs. */ |
| 1369 | |
| 1370 | static bfd_reloc_status_type |
| 1371 | ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data, |
| 1372 | input_section, output_bfd, error_message) |
| 1373 | bfd *abfd; |
| 1374 | arelent *reloc_entry; |
| 1375 | asymbol *symbol; |
| 1376 | PTR data; |
| 1377 | asection *input_section; |
| 1378 | bfd *output_bfd; |
| 1379 | char **error_message; |
| 1380 | { |
| 1381 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1382 | call the generic function. Any adjustment will be done at final |
| 1383 | link time. */ |
| 1384 | if (output_bfd != NULL) |
| 1385 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1386 | input_section, output_bfd, error_message); |
| 1387 | |
| 1388 | /* Adjust the addend for sign extension of the low 16 bits. |
| 1389 | We won't actually be using the low 16 bits, so trashing them |
| 1390 | doesn't matter. */ |
| 1391 | reloc_entry->addend += 0x8000; |
| 1392 | return bfd_reloc_continue; |
| 1393 | } |
| 1394 | |
| 1395 | static bfd_reloc_status_type |
| 1396 | ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data, |
| 1397 | input_section, output_bfd, error_message) |
| 1398 | bfd *abfd; |
| 1399 | arelent *reloc_entry; |
| 1400 | asymbol *symbol; |
| 1401 | PTR data; |
| 1402 | asection *input_section; |
| 1403 | bfd *output_bfd; |
| 1404 | char **error_message; |
| 1405 | { |
| 1406 | long insn; |
| 1407 | enum elf_ppc_reloc_type r_type; |
| 1408 | bfd_size_type octets; |
| 1409 | /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| 1410 | bfd_boolean is_power4 = FALSE; |
| 1411 | |
| 1412 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1413 | call the generic function. Any adjustment will be done at final |
| 1414 | link time. */ |
| 1415 | if (output_bfd != NULL) |
| 1416 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1417 | input_section, output_bfd, error_message); |
| 1418 | |
| 1419 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| 1420 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
| 1421 | insn &= ~(0x01 << 21); |
| 1422 | r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type; |
| 1423 | if (r_type == R_PPC64_ADDR14_BRTAKEN |
| 1424 | || r_type == R_PPC64_REL14_BRTAKEN) |
| 1425 | insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| 1426 | |
| 1427 | if (is_power4) |
| 1428 | { |
| 1429 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
| 1430 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| 1431 | for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| 1432 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| 1433 | insn |= 0x02 << 21; |
| 1434 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| 1435 | insn |= 0x08 << 21; |
| 1436 | else |
| 1437 | return bfd_reloc_continue; |
| 1438 | } |
| 1439 | else |
| 1440 | { |
| 1441 | bfd_vma target = 0; |
| 1442 | bfd_vma from; |
| 1443 | |
| 1444 | if (!bfd_is_com_section (symbol->section)) |
| 1445 | target = symbol->value; |
| 1446 | target += symbol->section->output_section->vma; |
| 1447 | target += symbol->section->output_offset; |
| 1448 | target += reloc_entry->addend; |
| 1449 | |
| 1450 | from = (reloc_entry->address |
| 1451 | + input_section->output_offset |
| 1452 | + input_section->output_section->vma); |
| 1453 | |
| 1454 | /* Invert 'y' bit if not the default. */ |
| 1455 | if ((bfd_signed_vma) (target - from) < 0) |
| 1456 | insn ^= 0x01 << 21; |
| 1457 | } |
| 1458 | bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets); |
| 1459 | return bfd_reloc_continue; |
| 1460 | } |
| 1461 | |
| 1462 | static bfd_reloc_status_type |
| 1463 | ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data, |
| 1464 | input_section, output_bfd, error_message) |
| 1465 | bfd *abfd; |
| 1466 | arelent *reloc_entry; |
| 1467 | asymbol *symbol; |
| 1468 | PTR data; |
| 1469 | asection *input_section; |
| 1470 | bfd *output_bfd; |
| 1471 | char **error_message; |
| 1472 | { |
| 1473 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1474 | call the generic function. Any adjustment will be done at final |
| 1475 | link time. */ |
| 1476 | if (output_bfd != NULL) |
| 1477 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1478 | input_section, output_bfd, error_message); |
| 1479 | |
| 1480 | /* Subtract the symbol section base address. */ |
| 1481 | reloc_entry->addend -= symbol->section->output_section->vma; |
| 1482 | return bfd_reloc_continue; |
| 1483 | } |
| 1484 | |
| 1485 | static bfd_reloc_status_type |
| 1486 | ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data, |
| 1487 | input_section, output_bfd, error_message) |
| 1488 | bfd *abfd; |
| 1489 | arelent *reloc_entry; |
| 1490 | asymbol *symbol; |
| 1491 | PTR data; |
| 1492 | asection *input_section; |
| 1493 | bfd *output_bfd; |
| 1494 | char **error_message; |
| 1495 | { |
| 1496 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1497 | call the generic function. Any adjustment will be done at final |
| 1498 | link time. */ |
| 1499 | if (output_bfd != NULL) |
| 1500 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1501 | input_section, output_bfd, error_message); |
| 1502 | |
| 1503 | /* Subtract the symbol section base address. */ |
| 1504 | reloc_entry->addend -= symbol->section->output_section->vma; |
| 1505 | |
| 1506 | /* Adjust the addend for sign extension of the low 16 bits. */ |
| 1507 | reloc_entry->addend += 0x8000; |
| 1508 | return bfd_reloc_continue; |
| 1509 | } |
| 1510 | |
| 1511 | static bfd_reloc_status_type |
| 1512 | ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data, |
| 1513 | input_section, output_bfd, error_message) |
| 1514 | bfd *abfd; |
| 1515 | arelent *reloc_entry; |
| 1516 | asymbol *symbol; |
| 1517 | PTR data; |
| 1518 | asection *input_section; |
| 1519 | bfd *output_bfd; |
| 1520 | char **error_message; |
| 1521 | { |
| 1522 | bfd_vma TOCstart; |
| 1523 | |
| 1524 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1525 | call the generic function. Any adjustment will be done at final |
| 1526 | link time. */ |
| 1527 | if (output_bfd != NULL) |
| 1528 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1529 | input_section, output_bfd, error_message); |
| 1530 | |
| 1531 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| 1532 | if (TOCstart == 0) |
| 1533 | TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| 1534 | |
| 1535 | /* Subtract the TOC base address. */ |
| 1536 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| 1537 | return bfd_reloc_continue; |
| 1538 | } |
| 1539 | |
| 1540 | static bfd_reloc_status_type |
| 1541 | ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data, |
| 1542 | input_section, output_bfd, error_message) |
| 1543 | bfd *abfd; |
| 1544 | arelent *reloc_entry; |
| 1545 | asymbol *symbol; |
| 1546 | PTR data; |
| 1547 | asection *input_section; |
| 1548 | bfd *output_bfd; |
| 1549 | char **error_message; |
| 1550 | { |
| 1551 | bfd_vma TOCstart; |
| 1552 | |
| 1553 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1554 | call the generic function. Any adjustment will be done at final |
| 1555 | link time. */ |
| 1556 | if (output_bfd != NULL) |
| 1557 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1558 | input_section, output_bfd, error_message); |
| 1559 | |
| 1560 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| 1561 | if (TOCstart == 0) |
| 1562 | TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| 1563 | |
| 1564 | /* Subtract the TOC base address. */ |
| 1565 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| 1566 | |
| 1567 | /* Adjust the addend for sign extension of the low 16 bits. */ |
| 1568 | reloc_entry->addend += 0x8000; |
| 1569 | return bfd_reloc_continue; |
| 1570 | } |
| 1571 | |
| 1572 | static bfd_reloc_status_type |
| 1573 | ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data, |
| 1574 | input_section, output_bfd, error_message) |
| 1575 | bfd *abfd; |
| 1576 | arelent *reloc_entry; |
| 1577 | asymbol *symbol; |
| 1578 | PTR data; |
| 1579 | asection *input_section; |
| 1580 | bfd *output_bfd; |
| 1581 | char **error_message; |
| 1582 | { |
| 1583 | bfd_vma TOCstart; |
| 1584 | bfd_size_type octets; |
| 1585 | |
| 1586 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1587 | call the generic function. Any adjustment will be done at final |
| 1588 | link time. */ |
| 1589 | if (output_bfd != NULL) |
| 1590 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1591 | input_section, output_bfd, error_message); |
| 1592 | |
| 1593 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| 1594 | if (TOCstart == 0) |
| 1595 | TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| 1596 | |
| 1597 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| 1598 | bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); |
| 1599 | return bfd_reloc_ok; |
| 1600 | } |
| 1601 | |
| 1602 | static bfd_reloc_status_type |
| 1603 | ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data, |
| 1604 | input_section, output_bfd, error_message) |
| 1605 | bfd *abfd; |
| 1606 | arelent *reloc_entry; |
| 1607 | asymbol *symbol; |
| 1608 | PTR data; |
| 1609 | asection *input_section; |
| 1610 | bfd *output_bfd; |
| 1611 | char **error_message; |
| 1612 | { |
| 1613 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1614 | call the generic function. Any adjustment will be done at final |
| 1615 | link time. */ |
| 1616 | if (output_bfd != NULL) |
| 1617 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1618 | input_section, output_bfd, error_message); |
| 1619 | |
| 1620 | if (error_message != NULL) |
| 1621 | { |
| 1622 | static char buf[60]; |
| 1623 | sprintf (buf, "generic linker can't handle %s", |
| 1624 | reloc_entry->howto->name); |
| 1625 | *error_message = buf; |
| 1626 | } |
| 1627 | return bfd_reloc_dangerous; |
| 1628 | } |
| 1629 | |
| 1630 | /* Fix bad default arch selected for a 64 bit input bfd when the |
| 1631 | default is 32 bit. */ |
| 1632 | |
| 1633 | static bfd_boolean |
| 1634 | ppc64_elf_object_p (abfd) |
| 1635 | bfd *abfd; |
| 1636 | { |
| 1637 | if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32) |
| 1638 | { |
| 1639 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 1640 | |
| 1641 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) |
| 1642 | { |
| 1643 | /* Relies on arch after 32 bit default being 64 bit default. */ |
| 1644 | abfd->arch_info = abfd->arch_info->next; |
| 1645 | BFD_ASSERT (abfd->arch_info->bits_per_word == 64); |
| 1646 | } |
| 1647 | } |
| 1648 | return TRUE; |
| 1649 | } |
| 1650 | |
| 1651 | /* Merge backend specific data from an object file to the output |
| 1652 | object file when linking. */ |
| 1653 | |
| 1654 | static bfd_boolean |
| 1655 | ppc64_elf_merge_private_bfd_data (ibfd, obfd) |
| 1656 | bfd *ibfd; |
| 1657 | bfd *obfd; |
| 1658 | { |
| 1659 | /* Check if we have the same endianess. */ |
| 1660 | if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| 1661 | && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN |
| 1662 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| 1663 | { |
| 1664 | const char *msg; |
| 1665 | |
| 1666 | if (bfd_big_endian (ibfd)) |
| 1667 | msg = _("%s: compiled for a big endian system and target is little endian"); |
| 1668 | else |
| 1669 | msg = _("%s: compiled for a little endian system and target is big endian"); |
| 1670 | |
| 1671 | (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd)); |
| 1672 | |
| 1673 | bfd_set_error (bfd_error_wrong_format); |
| 1674 | return FALSE; |
| 1675 | } |
| 1676 | |
| 1677 | return TRUE; |
| 1678 | } |
| 1679 | \f |
| 1680 | /* The following functions are specific to the ELF linker, while |
| 1681 | functions above are used generally. Those named ppc64_elf_* are |
| 1682 | called by the main ELF linker code. They appear in this file more |
| 1683 | or less in the order in which they are called. eg. |
| 1684 | ppc64_elf_check_relocs is called early in the link process, |
| 1685 | ppc64_elf_finish_dynamic_sections is one of the last functions |
| 1686 | called. |
| 1687 | |
| 1688 | PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that |
| 1689 | functions have both a function code symbol and a function descriptor |
| 1690 | symbol. A call to foo in a relocatable object file looks like: |
| 1691 | |
| 1692 | . .text |
| 1693 | . x: |
| 1694 | . bl .foo |
| 1695 | . nop |
| 1696 | |
| 1697 | The function definition in another object file might be: |
| 1698 | |
| 1699 | . .section .opd |
| 1700 | . foo: .quad .foo |
| 1701 | . .quad .TOC.@tocbase |
| 1702 | . .quad 0 |
| 1703 | . |
| 1704 | . .text |
| 1705 | . .foo: blr |
| 1706 | |
| 1707 | When the linker resolves the call during a static link, the branch |
| 1708 | unsurprisingly just goes to .foo and the .opd information is unused. |
| 1709 | If the function definition is in a shared library, things are a little |
| 1710 | different: The call goes via a plt call stub, the opd information gets |
| 1711 | copied to the plt, and the linker patches the nop. |
| 1712 | |
| 1713 | . x: |
| 1714 | . bl .foo_stub |
| 1715 | . ld 2,40(1) |
| 1716 | . |
| 1717 | . |
| 1718 | . .foo_stub: |
| 1719 | . addis 12,2,Lfoo@toc@ha # in practice, the call stub |
| 1720 | . addi 12,12,Lfoo@toc@l # is slightly optimised, but |
| 1721 | . std 2,40(1) # this is the general idea |
| 1722 | . ld 11,0(12) |
| 1723 | . ld 2,8(12) |
| 1724 | . mtctr 11 |
| 1725 | . ld 11,16(12) |
| 1726 | . bctr |
| 1727 | . |
| 1728 | . .section .plt |
| 1729 | . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) |
| 1730 | |
| 1731 | The "reloc ()" notation is supposed to indicate that the linker emits |
| 1732 | an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd |
| 1733 | copying. |
| 1734 | |
| 1735 | What are the difficulties here? Well, firstly, the relocations |
| 1736 | examined by the linker in check_relocs are against the function code |
| 1737 | sym .foo, while the dynamic relocation in the plt is emitted against |
| 1738 | the function descriptor symbol, foo. Somewhere along the line, we need |
| 1739 | to carefully copy dynamic link information from one symbol to the other. |
| 1740 | Secondly, the generic part of the elf linker will make .foo a dynamic |
| 1741 | symbol as is normal for most other backends. We need foo dynamic |
| 1742 | instead, at least for an application final link. However, when |
| 1743 | creating a shared library containing foo, we need to have both symbols |
| 1744 | dynamic so that references to .foo are satisfied during the early |
| 1745 | stages of linking. Otherwise the linker might decide to pull in a |
| 1746 | definition from some other object, eg. a static library. */ |
| 1747 | |
| 1748 | /* The linker needs to keep track of the number of relocs that it |
| 1749 | decides to copy as dynamic relocs in check_relocs for each symbol. |
| 1750 | This is so that it can later discard them if they are found to be |
| 1751 | unnecessary. We store the information in a field extending the |
| 1752 | regular ELF linker hash table. */ |
| 1753 | |
| 1754 | struct ppc_dyn_relocs |
| 1755 | { |
| 1756 | struct ppc_dyn_relocs *next; |
| 1757 | |
| 1758 | /* The input section of the reloc. */ |
| 1759 | asection *sec; |
| 1760 | |
| 1761 | /* Total number of relocs copied for the input section. */ |
| 1762 | bfd_size_type count; |
| 1763 | |
| 1764 | /* Number of pc-relative relocs copied for the input section. */ |
| 1765 | bfd_size_type pc_count; |
| 1766 | }; |
| 1767 | |
| 1768 | /* Of those relocs that might be copied as dynamic relocs, this macro |
| 1769 | selects between relative and absolute types. */ |
| 1770 | |
| 1771 | #define IS_ABSOLUTE_RELOC(RTYPE) \ |
| 1772 | ((RTYPE) != R_PPC64_REL32 \ |
| 1773 | && (RTYPE) != R_PPC64_REL64 \ |
| 1774 | && (RTYPE) != R_PPC64_ADDR30) |
| 1775 | |
| 1776 | /* Section name for stubs is the associated section name plus this |
| 1777 | string. */ |
| 1778 | #define STUB_SUFFIX ".stub" |
| 1779 | |
| 1780 | /* Linker stubs. |
| 1781 | ppc_stub_long_branch: |
| 1782 | Used when a 14 bit branch (or even a 24 bit branch) can't reach its |
| 1783 | destination, but a 24 bit branch in a stub section will reach. |
| 1784 | . b dest |
| 1785 | |
| 1786 | ppc_stub_plt_branch: |
| 1787 | Similar to the above, but a 24 bit branch in the stub section won't |
| 1788 | reach its destination. |
| 1789 | . addis %r12,%r2,xxx@toc@ha |
| 1790 | . ld %r11,xxx@toc@l(%r12) |
| 1791 | . mtctr %r11 |
| 1792 | . bctr |
| 1793 | |
| 1794 | ppc_stub_plt_call: |
| 1795 | Used to call a function in a shared library. |
| 1796 | . addis %r12,%r2,xxx@toc@ha |
| 1797 | . std %r2,40(%r1) |
| 1798 | . ld %r11,xxx+0@toc@l(%r12) |
| 1799 | . ld %r2,xxx+8@toc@l(%r12) |
| 1800 | . mtctr %r11 |
| 1801 | . ld %r11,xxx+16@toc@l(%r12) |
| 1802 | . bctr |
| 1803 | */ |
| 1804 | |
| 1805 | enum ppc_stub_type { |
| 1806 | ppc_stub_none, |
| 1807 | ppc_stub_long_branch, |
| 1808 | ppc_stub_plt_branch, |
| 1809 | ppc_stub_plt_call |
| 1810 | }; |
| 1811 | |
| 1812 | struct ppc_stub_hash_entry { |
| 1813 | |
| 1814 | /* Base hash table entry structure. */ |
| 1815 | struct bfd_hash_entry root; |
| 1816 | |
| 1817 | /* The stub section. */ |
| 1818 | asection *stub_sec; |
| 1819 | |
| 1820 | /* Offset within stub_sec of the beginning of this stub. */ |
| 1821 | bfd_vma stub_offset; |
| 1822 | |
| 1823 | /* Given the symbol's value and its section we can determine its final |
| 1824 | value when building the stubs (so the stub knows where to jump. */ |
| 1825 | bfd_vma target_value; |
| 1826 | asection *target_section; |
| 1827 | |
| 1828 | enum ppc_stub_type stub_type; |
| 1829 | |
| 1830 | /* The symbol table entry, if any, that this was derived from. */ |
| 1831 | struct ppc_link_hash_entry *h; |
| 1832 | |
| 1833 | /* Where this stub is being called from, or, in the case of combined |
| 1834 | stub sections, the first input section in the group. */ |
| 1835 | asection *id_sec; |
| 1836 | }; |
| 1837 | |
| 1838 | struct ppc_branch_hash_entry { |
| 1839 | |
| 1840 | /* Base hash table entry structure. */ |
| 1841 | struct bfd_hash_entry root; |
| 1842 | |
| 1843 | /* Offset within .branch_lt. */ |
| 1844 | unsigned int offset; |
| 1845 | |
| 1846 | /* Generation marker. */ |
| 1847 | unsigned int iter; |
| 1848 | }; |
| 1849 | |
| 1850 | struct ppc_link_hash_entry |
| 1851 | { |
| 1852 | struct elf_link_hash_entry elf; |
| 1853 | |
| 1854 | /* A pointer to the most recently used stub hash entry against this |
| 1855 | symbol. */ |
| 1856 | struct ppc_stub_hash_entry *stub_cache; |
| 1857 | |
| 1858 | /* Track dynamic relocs copied for this symbol. */ |
| 1859 | struct ppc_dyn_relocs *dyn_relocs; |
| 1860 | |
| 1861 | /* Link between function code and descriptor symbols. */ |
| 1862 | struct elf_link_hash_entry *oh; |
| 1863 | |
| 1864 | /* Flag function code and descriptor symbols. */ |
| 1865 | unsigned int is_func:1; |
| 1866 | unsigned int is_func_descriptor:1; |
| 1867 | unsigned int is_entry:1; |
| 1868 | }; |
| 1869 | |
| 1870 | /* ppc64 ELF linker hash table. */ |
| 1871 | |
| 1872 | struct ppc_link_hash_table |
| 1873 | { |
| 1874 | struct elf_link_hash_table elf; |
| 1875 | |
| 1876 | /* The stub hash table. */ |
| 1877 | struct bfd_hash_table stub_hash_table; |
| 1878 | |
| 1879 | /* Another hash table for plt_branch stubs. */ |
| 1880 | struct bfd_hash_table branch_hash_table; |
| 1881 | |
| 1882 | /* Linker stub bfd. */ |
| 1883 | bfd *stub_bfd; |
| 1884 | |
| 1885 | /* Linker call-backs. */ |
| 1886 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| 1887 | void (*layout_sections_again) PARAMS ((void)); |
| 1888 | |
| 1889 | /* Array to keep track of which stub sections have been created, and |
| 1890 | information on stub grouping. */ |
| 1891 | struct map_stub { |
| 1892 | /* This is the section to which stubs in the group will be attached. */ |
| 1893 | asection *link_sec; |
| 1894 | /* The stub section. */ |
| 1895 | asection *stub_sec; |
| 1896 | } *stub_group; |
| 1897 | |
| 1898 | /* Assorted information used by ppc64_elf_size_stubs. */ |
| 1899 | int top_index; |
| 1900 | asection **input_list; |
| 1901 | |
| 1902 | /* Short-cuts to get to dynamic linker sections. */ |
| 1903 | asection *sgot; |
| 1904 | asection *srelgot; |
| 1905 | asection *splt; |
| 1906 | asection *srelplt; |
| 1907 | asection *sdynbss; |
| 1908 | asection *srelbss; |
| 1909 | asection *sglink; |
| 1910 | asection *sfpr; |
| 1911 | asection *sbrlt; |
| 1912 | asection *srelbrlt; |
| 1913 | |
| 1914 | /* Set on error. */ |
| 1915 | unsigned int stub_error; |
| 1916 | |
| 1917 | /* Flag set when small branches are detected. Used to |
| 1918 | select suitable defaults for the stub group size. */ |
| 1919 | unsigned int has_14bit_branch; |
| 1920 | |
| 1921 | /* Set if we detect a reference undefined weak symbol. */ |
| 1922 | unsigned int have_undefweak; |
| 1923 | |
| 1924 | /* Incremented every time we size stubs. */ |
| 1925 | unsigned int stub_iteration; |
| 1926 | |
| 1927 | /* Small local sym to section mapping cache. */ |
| 1928 | struct sym_sec_cache sym_sec; |
| 1929 | }; |
| 1930 | |
| 1931 | static struct bfd_hash_entry *stub_hash_newfunc |
| 1932 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 1933 | static struct bfd_hash_entry *branch_hash_newfunc |
| 1934 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 1935 | static struct bfd_hash_entry *link_hash_newfunc |
| 1936 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 1937 | static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create |
| 1938 | PARAMS ((bfd *)); |
| 1939 | static void ppc64_elf_link_hash_table_free |
| 1940 | PARAMS ((struct bfd_link_hash_table *)); |
| 1941 | static char *ppc_stub_name |
| 1942 | PARAMS ((const asection *, const asection *, |
| 1943 | const struct ppc_link_hash_entry *, const Elf_Internal_Rela *)); |
| 1944 | static struct ppc_stub_hash_entry *ppc_get_stub_entry |
| 1945 | PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *, |
| 1946 | const Elf_Internal_Rela *, struct ppc_link_hash_table *)); |
| 1947 | static struct ppc_stub_hash_entry *ppc_add_stub |
| 1948 | PARAMS ((const char *, asection *, struct ppc_link_hash_table *)); |
| 1949 | static bfd_boolean create_linkage_sections |
| 1950 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 1951 | static bfd_boolean create_got_section |
| 1952 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 1953 | static bfd_boolean ppc64_elf_create_dynamic_sections |
| 1954 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 1955 | static void ppc64_elf_copy_indirect_symbol |
| 1956 | PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
| 1957 | struct elf_link_hash_entry *)); |
| 1958 | static bfd_boolean ppc64_elf_check_relocs |
| 1959 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 1960 | const Elf_Internal_Rela *)); |
| 1961 | static asection * ppc64_elf_gc_mark_hook |
| 1962 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| 1963 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 1964 | static bfd_boolean ppc64_elf_gc_sweep_hook |
| 1965 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 1966 | const Elf_Internal_Rela *)); |
| 1967 | static bfd_boolean func_desc_adjust |
| 1968 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 1969 | static bfd_boolean ppc64_elf_func_desc_adjust |
| 1970 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 1971 | static bfd_boolean ppc64_elf_adjust_dynamic_symbol |
| 1972 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 1973 | static void ppc64_elf_hide_symbol |
| 1974 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean)); |
| 1975 | static bfd_boolean allocate_dynrelocs |
| 1976 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 1977 | static bfd_boolean readonly_dynrelocs |
| 1978 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 1979 | static enum elf_reloc_type_class ppc64_elf_reloc_type_class |
| 1980 | PARAMS ((const Elf_Internal_Rela *)); |
| 1981 | static bfd_boolean ppc64_elf_size_dynamic_sections |
| 1982 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 1983 | static INLINE enum ppc_stub_type ppc_type_of_stub |
| 1984 | PARAMS ((asection *, const Elf_Internal_Rela *, |
| 1985 | struct ppc_link_hash_entry **, bfd_vma)); |
| 1986 | static bfd_byte *build_plt_stub |
| 1987 | PARAMS ((bfd *, bfd_byte *, int, int)); |
| 1988 | static bfd_boolean ppc_build_one_stub |
| 1989 | PARAMS ((struct bfd_hash_entry *, PTR)); |
| 1990 | static bfd_boolean ppc_size_one_stub |
| 1991 | PARAMS ((struct bfd_hash_entry *, PTR)); |
| 1992 | static void group_sections |
| 1993 | PARAMS ((struct ppc_link_hash_table *, bfd_size_type, bfd_boolean)); |
| 1994 | static bfd_boolean ppc64_elf_relocate_section |
| 1995 | PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, |
| 1996 | Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, |
| 1997 | asection **)); |
| 1998 | static bfd_boolean ppc64_elf_finish_dynamic_symbol |
| 1999 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 2000 | Elf_Internal_Sym *)); |
| 2001 | static bfd_boolean ppc64_elf_finish_dynamic_sections |
| 2002 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 2003 | |
| 2004 | /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
| 2005 | |
| 2006 | #define ppc_hash_table(p) \ |
| 2007 | ((struct ppc_link_hash_table *) ((p)->hash)) |
| 2008 | |
| 2009 | #define ppc_stub_hash_lookup(table, string, create, copy) \ |
| 2010 | ((struct ppc_stub_hash_entry *) \ |
| 2011 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 2012 | |
| 2013 | #define ppc_branch_hash_lookup(table, string, create, copy) \ |
| 2014 | ((struct ppc_branch_hash_entry *) \ |
| 2015 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 2016 | |
| 2017 | /* Create an entry in the stub hash table. */ |
| 2018 | |
| 2019 | static struct bfd_hash_entry * |
| 2020 | stub_hash_newfunc (entry, table, string) |
| 2021 | struct bfd_hash_entry *entry; |
| 2022 | struct bfd_hash_table *table; |
| 2023 | const char *string; |
| 2024 | { |
| 2025 | /* Allocate the structure if it has not already been allocated by a |
| 2026 | subclass. */ |
| 2027 | if (entry == NULL) |
| 2028 | { |
| 2029 | entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); |
| 2030 | if (entry == NULL) |
| 2031 | return entry; |
| 2032 | } |
| 2033 | |
| 2034 | /* Call the allocation method of the superclass. */ |
| 2035 | entry = bfd_hash_newfunc (entry, table, string); |
| 2036 | if (entry != NULL) |
| 2037 | { |
| 2038 | struct ppc_stub_hash_entry *eh; |
| 2039 | |
| 2040 | /* Initialize the local fields. */ |
| 2041 | eh = (struct ppc_stub_hash_entry *) entry; |
| 2042 | eh->stub_sec = NULL; |
| 2043 | eh->stub_offset = 0; |
| 2044 | eh->target_value = 0; |
| 2045 | eh->target_section = NULL; |
| 2046 | eh->stub_type = ppc_stub_none; |
| 2047 | eh->h = NULL; |
| 2048 | eh->id_sec = NULL; |
| 2049 | } |
| 2050 | |
| 2051 | return entry; |
| 2052 | } |
| 2053 | |
| 2054 | /* Create an entry in the branch hash table. */ |
| 2055 | |
| 2056 | static struct bfd_hash_entry * |
| 2057 | branch_hash_newfunc (entry, table, string) |
| 2058 | struct bfd_hash_entry *entry; |
| 2059 | struct bfd_hash_table *table; |
| 2060 | const char *string; |
| 2061 | { |
| 2062 | /* Allocate the structure if it has not already been allocated by a |
| 2063 | subclass. */ |
| 2064 | if (entry == NULL) |
| 2065 | { |
| 2066 | entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); |
| 2067 | if (entry == NULL) |
| 2068 | return entry; |
| 2069 | } |
| 2070 | |
| 2071 | /* Call the allocation method of the superclass. */ |
| 2072 | entry = bfd_hash_newfunc (entry, table, string); |
| 2073 | if (entry != NULL) |
| 2074 | { |
| 2075 | struct ppc_branch_hash_entry *eh; |
| 2076 | |
| 2077 | /* Initialize the local fields. */ |
| 2078 | eh = (struct ppc_branch_hash_entry *) entry; |
| 2079 | eh->offset = 0; |
| 2080 | eh->iter = 0; |
| 2081 | } |
| 2082 | |
| 2083 | return entry; |
| 2084 | } |
| 2085 | |
| 2086 | /* Create an entry in a ppc64 ELF linker hash table. */ |
| 2087 | |
| 2088 | static struct bfd_hash_entry * |
| 2089 | link_hash_newfunc (entry, table, string) |
| 2090 | struct bfd_hash_entry *entry; |
| 2091 | struct bfd_hash_table *table; |
| 2092 | const char *string; |
| 2093 | { |
| 2094 | /* Allocate the structure if it has not already been allocated by a |
| 2095 | subclass. */ |
| 2096 | if (entry == NULL) |
| 2097 | { |
| 2098 | entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); |
| 2099 | if (entry == NULL) |
| 2100 | return entry; |
| 2101 | } |
| 2102 | |
| 2103 | /* Call the allocation method of the superclass. */ |
| 2104 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 2105 | if (entry != NULL) |
| 2106 | { |
| 2107 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; |
| 2108 | |
| 2109 | eh->stub_cache = NULL; |
| 2110 | eh->dyn_relocs = NULL; |
| 2111 | eh->oh = NULL; |
| 2112 | eh->is_func = 0; |
| 2113 | eh->is_func_descriptor = 0; |
| 2114 | eh->is_entry = 0; |
| 2115 | } |
| 2116 | |
| 2117 | return entry; |
| 2118 | } |
| 2119 | |
| 2120 | /* Create a ppc64 ELF linker hash table. */ |
| 2121 | |
| 2122 | static struct bfd_link_hash_table * |
| 2123 | ppc64_elf_link_hash_table_create (abfd) |
| 2124 | bfd *abfd; |
| 2125 | { |
| 2126 | struct ppc_link_hash_table *htab; |
| 2127 | bfd_size_type amt = sizeof (struct ppc_link_hash_table); |
| 2128 | |
| 2129 | htab = (struct ppc_link_hash_table *) bfd_malloc (amt); |
| 2130 | if (htab == NULL) |
| 2131 | return NULL; |
| 2132 | |
| 2133 | if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) |
| 2134 | { |
| 2135 | free (htab); |
| 2136 | return NULL; |
| 2137 | } |
| 2138 | |
| 2139 | /* Init the stub hash table too. */ |
| 2140 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc)) |
| 2141 | return NULL; |
| 2142 | |
| 2143 | /* And the branch hash table. */ |
| 2144 | if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc)) |
| 2145 | return NULL; |
| 2146 | |
| 2147 | htab->stub_bfd = NULL; |
| 2148 | htab->add_stub_section = NULL; |
| 2149 | htab->layout_sections_again = NULL; |
| 2150 | htab->stub_group = NULL; |
| 2151 | htab->sgot = NULL; |
| 2152 | htab->srelgot = NULL; |
| 2153 | htab->splt = NULL; |
| 2154 | htab->srelplt = NULL; |
| 2155 | htab->sdynbss = NULL; |
| 2156 | htab->srelbss = NULL; |
| 2157 | htab->sglink = NULL; |
| 2158 | htab->sfpr = NULL; |
| 2159 | htab->sbrlt = NULL; |
| 2160 | htab->srelbrlt = NULL; |
| 2161 | htab->stub_error = 0; |
| 2162 | htab->has_14bit_branch = 0; |
| 2163 | htab->have_undefweak = 0; |
| 2164 | htab->stub_iteration = 0; |
| 2165 | htab->sym_sec.abfd = NULL; |
| 2166 | |
| 2167 | return &htab->elf.root; |
| 2168 | } |
| 2169 | |
| 2170 | /* Free the derived linker hash table. */ |
| 2171 | |
| 2172 | static void |
| 2173 | ppc64_elf_link_hash_table_free (hash) |
| 2174 | struct bfd_link_hash_table *hash; |
| 2175 | { |
| 2176 | struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash; |
| 2177 | |
| 2178 | bfd_hash_table_free (&ret->stub_hash_table); |
| 2179 | bfd_hash_table_free (&ret->branch_hash_table); |
| 2180 | _bfd_generic_link_hash_table_free (hash); |
| 2181 | } |
| 2182 | |
| 2183 | /* Build a name for an entry in the stub hash table. */ |
| 2184 | |
| 2185 | static char * |
| 2186 | ppc_stub_name (input_section, sym_sec, h, rel) |
| 2187 | const asection *input_section; |
| 2188 | const asection *sym_sec; |
| 2189 | const struct ppc_link_hash_entry *h; |
| 2190 | const Elf_Internal_Rela *rel; |
| 2191 | { |
| 2192 | char *stub_name; |
| 2193 | bfd_size_type len; |
| 2194 | |
| 2195 | /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 |
| 2196 | offsets from a sym as a branch target? In fact, we could |
| 2197 | probably assume the addend is always zero. */ |
| 2198 | BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); |
| 2199 | |
| 2200 | if (h) |
| 2201 | { |
| 2202 | len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; |
| 2203 | stub_name = bfd_malloc (len); |
| 2204 | if (stub_name != NULL) |
| 2205 | { |
| 2206 | sprintf (stub_name, "%08x_%s+%x", |
| 2207 | input_section->id & 0xffffffff, |
| 2208 | h->elf.root.root.string, |
| 2209 | (int) rel->r_addend & 0xffffffff); |
| 2210 | } |
| 2211 | } |
| 2212 | else |
| 2213 | { |
| 2214 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; |
| 2215 | stub_name = bfd_malloc (len); |
| 2216 | if (stub_name != NULL) |
| 2217 | { |
| 2218 | sprintf (stub_name, "%08x_%x:%x+%x", |
| 2219 | input_section->id & 0xffffffff, |
| 2220 | sym_sec->id & 0xffffffff, |
| 2221 | (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, |
| 2222 | (int) rel->r_addend & 0xffffffff); |
| 2223 | } |
| 2224 | } |
| 2225 | return stub_name; |
| 2226 | } |
| 2227 | |
| 2228 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 2229 | creating the stub name takes a bit of time. */ |
| 2230 | |
| 2231 | static struct ppc_stub_hash_entry * |
| 2232 | ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab) |
| 2233 | const asection *input_section; |
| 2234 | const asection *sym_sec; |
| 2235 | struct elf_link_hash_entry *hash; |
| 2236 | const Elf_Internal_Rela *rel; |
| 2237 | struct ppc_link_hash_table *htab; |
| 2238 | { |
| 2239 | struct ppc_stub_hash_entry *stub_entry; |
| 2240 | struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash; |
| 2241 | const asection *id_sec; |
| 2242 | |
| 2243 | /* If this input section is part of a group of sections sharing one |
| 2244 | stub section, then use the id of the first section in the group. |
| 2245 | Stub names need to include a section id, as there may well be |
| 2246 | more than one stub used to reach say, printf, and we need to |
| 2247 | distinguish between them. */ |
| 2248 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 2249 | |
| 2250 | if (h != NULL && h->stub_cache != NULL |
| 2251 | && h->stub_cache->h == h |
| 2252 | && h->stub_cache->id_sec == id_sec) |
| 2253 | { |
| 2254 | stub_entry = h->stub_cache; |
| 2255 | } |
| 2256 | else |
| 2257 | { |
| 2258 | char *stub_name; |
| 2259 | |
| 2260 | stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); |
| 2261 | if (stub_name == NULL) |
| 2262 | return NULL; |
| 2263 | |
| 2264 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| 2265 | stub_name, FALSE, FALSE); |
| 2266 | if (h != NULL) |
| 2267 | h->stub_cache = stub_entry; |
| 2268 | |
| 2269 | free (stub_name); |
| 2270 | } |
| 2271 | |
| 2272 | return stub_entry; |
| 2273 | } |
| 2274 | |
| 2275 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 2276 | stub entry are initialised. */ |
| 2277 | |
| 2278 | static struct ppc_stub_hash_entry * |
| 2279 | ppc_add_stub (stub_name, section, htab) |
| 2280 | const char *stub_name; |
| 2281 | asection *section; |
| 2282 | struct ppc_link_hash_table *htab; |
| 2283 | { |
| 2284 | asection *link_sec; |
| 2285 | asection *stub_sec; |
| 2286 | struct ppc_stub_hash_entry *stub_entry; |
| 2287 | |
| 2288 | link_sec = htab->stub_group[section->id].link_sec; |
| 2289 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 2290 | if (stub_sec == NULL) |
| 2291 | { |
| 2292 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 2293 | if (stub_sec == NULL) |
| 2294 | { |
| 2295 | size_t namelen; |
| 2296 | bfd_size_type len; |
| 2297 | char *s_name; |
| 2298 | |
| 2299 | namelen = strlen (link_sec->name); |
| 2300 | len = namelen + sizeof (STUB_SUFFIX); |
| 2301 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 2302 | if (s_name == NULL) |
| 2303 | return NULL; |
| 2304 | |
| 2305 | memcpy (s_name, link_sec->name, namelen); |
| 2306 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 2307 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 2308 | if (stub_sec == NULL) |
| 2309 | return NULL; |
| 2310 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 2311 | } |
| 2312 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 2313 | } |
| 2314 | |
| 2315 | /* Enter this entry into the linker stub hash table. */ |
| 2316 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 2317 | TRUE, FALSE); |
| 2318 | if (stub_entry == NULL) |
| 2319 | { |
| 2320 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 2321 | bfd_archive_filename (section->owner), |
| 2322 | stub_name); |
| 2323 | return NULL; |
| 2324 | } |
| 2325 | |
| 2326 | stub_entry->stub_sec = stub_sec; |
| 2327 | stub_entry->stub_offset = 0; |
| 2328 | stub_entry->id_sec = link_sec; |
| 2329 | return stub_entry; |
| 2330 | } |
| 2331 | |
| 2332 | /* Create sections for linker generated code. */ |
| 2333 | |
| 2334 | static bfd_boolean |
| 2335 | create_linkage_sections (dynobj, info) |
| 2336 | bfd *dynobj; |
| 2337 | struct bfd_link_info *info; |
| 2338 | { |
| 2339 | struct ppc_link_hash_table *htab; |
| 2340 | flagword flags; |
| 2341 | |
| 2342 | htab = ppc_hash_table (info); |
| 2343 | |
| 2344 | /* Create .sfpr for code to save and restore fp regs. */ |
| 2345 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
| 2346 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2347 | htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr"); |
| 2348 | if (htab->sfpr == NULL |
| 2349 | || ! bfd_set_section_flags (dynobj, htab->sfpr, flags) |
| 2350 | || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) |
| 2351 | return FALSE; |
| 2352 | |
| 2353 | /* Create .glink for lazy dynamic linking support. */ |
| 2354 | htab->sglink = bfd_make_section_anyway (dynobj, ".glink"); |
| 2355 | if (htab->sglink == NULL |
| 2356 | || ! bfd_set_section_flags (dynobj, htab->sglink, flags) |
| 2357 | || ! bfd_set_section_alignment (dynobj, htab->sglink, 2)) |
| 2358 | return FALSE; |
| 2359 | |
| 2360 | /* Create .branch_lt for plt_branch stubs. */ |
| 2361 | flags = (SEC_ALLOC | SEC_LOAD |
| 2362 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2363 | htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt"); |
| 2364 | if (htab->sbrlt == NULL |
| 2365 | || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags) |
| 2366 | || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3)) |
| 2367 | return FALSE; |
| 2368 | |
| 2369 | if (info->shared) |
| 2370 | { |
| 2371 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| 2372 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2373 | htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt"); |
| 2374 | if (!htab->srelbrlt |
| 2375 | || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags) |
| 2376 | || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3)) |
| 2377 | return FALSE; |
| 2378 | } |
| 2379 | return TRUE; |
| 2380 | } |
| 2381 | |
| 2382 | /* Create .got and .rela.got sections in DYNOBJ, and set up |
| 2383 | shortcuts to them in our hash table. */ |
| 2384 | |
| 2385 | static bfd_boolean |
| 2386 | create_got_section (dynobj, info) |
| 2387 | bfd *dynobj; |
| 2388 | struct bfd_link_info *info; |
| 2389 | { |
| 2390 | struct ppc_link_hash_table *htab; |
| 2391 | |
| 2392 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 2393 | return FALSE; |
| 2394 | |
| 2395 | htab = ppc_hash_table (info); |
| 2396 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2397 | if (!htab->sgot) |
| 2398 | abort (); |
| 2399 | |
| 2400 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 2401 | if (!htab->srelgot |
| 2402 | || ! bfd_set_section_flags (dynobj, htab->srelgot, |
| 2403 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 2404 | | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 2405 | | SEC_READONLY)) |
| 2406 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
| 2407 | return FALSE; |
| 2408 | return TRUE; |
| 2409 | } |
| 2410 | |
| 2411 | /* Create the dynamic sections, and set up shortcuts. */ |
| 2412 | |
| 2413 | static bfd_boolean |
| 2414 | ppc64_elf_create_dynamic_sections (dynobj, info) |
| 2415 | bfd *dynobj; |
| 2416 | struct bfd_link_info *info; |
| 2417 | { |
| 2418 | struct ppc_link_hash_table *htab; |
| 2419 | |
| 2420 | htab = ppc_hash_table (info); |
| 2421 | if (!htab->sgot && !create_got_section (dynobj, info)) |
| 2422 | return FALSE; |
| 2423 | |
| 2424 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 2425 | return FALSE; |
| 2426 | |
| 2427 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2428 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2429 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 2430 | if (!info->shared) |
| 2431 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 2432 | |
| 2433 | if (!htab->splt || !htab->srelplt || !htab->sdynbss |
| 2434 | || (!info->shared && !htab->srelbss)) |
| 2435 | abort (); |
| 2436 | |
| 2437 | return TRUE; |
| 2438 | } |
| 2439 | |
| 2440 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2441 | |
| 2442 | static void |
| 2443 | ppc64_elf_copy_indirect_symbol (bed, dir, ind) |
| 2444 | struct elf_backend_data *bed; |
| 2445 | struct elf_link_hash_entry *dir, *ind; |
| 2446 | { |
| 2447 | struct ppc_link_hash_entry *edir, *eind; |
| 2448 | |
| 2449 | edir = (struct ppc_link_hash_entry *) dir; |
| 2450 | eind = (struct ppc_link_hash_entry *) ind; |
| 2451 | |
| 2452 | if (eind->dyn_relocs != NULL) |
| 2453 | { |
| 2454 | if (edir->dyn_relocs != NULL) |
| 2455 | { |
| 2456 | struct ppc_dyn_relocs **pp; |
| 2457 | struct ppc_dyn_relocs *p; |
| 2458 | |
| 2459 | if (ind->root.type == bfd_link_hash_indirect) |
| 2460 | abort (); |
| 2461 | |
| 2462 | /* Add reloc counts against the weak sym to the strong sym |
| 2463 | list. Merge any entries against the same section. */ |
| 2464 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 2465 | { |
| 2466 | struct ppc_dyn_relocs *q; |
| 2467 | |
| 2468 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2469 | if (q->sec == p->sec) |
| 2470 | { |
| 2471 | q->pc_count += p->pc_count; |
| 2472 | q->count += p->count; |
| 2473 | *pp = p->next; |
| 2474 | break; |
| 2475 | } |
| 2476 | if (q == NULL) |
| 2477 | pp = &p->next; |
| 2478 | } |
| 2479 | *pp = edir->dyn_relocs; |
| 2480 | } |
| 2481 | |
| 2482 | edir->dyn_relocs = eind->dyn_relocs; |
| 2483 | eind->dyn_relocs = NULL; |
| 2484 | } |
| 2485 | |
| 2486 | edir->is_func |= eind->is_func; |
| 2487 | edir->is_func_descriptor |= eind->is_func_descriptor; |
| 2488 | edir->is_entry |= eind->is_entry; |
| 2489 | |
| 2490 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
| 2491 | } |
| 2492 | |
| 2493 | /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and |
| 2494 | symbols undefined on the command-line. */ |
| 2495 | |
| 2496 | bfd_boolean |
| 2497 | ppc64_elf_mark_entry_syms (info) |
| 2498 | struct bfd_link_info *info; |
| 2499 | { |
| 2500 | struct ppc_link_hash_table *htab; |
| 2501 | struct bfd_sym_chain *sym; |
| 2502 | |
| 2503 | htab = ppc_hash_table (info); |
| 2504 | for (sym = info->gc_sym_list; sym; sym = sym->next) |
| 2505 | { |
| 2506 | struct elf_link_hash_entry *h; |
| 2507 | |
| 2508 | h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE); |
| 2509 | if (h != NULL) |
| 2510 | ((struct ppc_link_hash_entry *) h)->is_entry = 1; |
| 2511 | } |
| 2512 | return TRUE; |
| 2513 | } |
| 2514 | |
| 2515 | /* Look through the relocs for a section during the first phase, and |
| 2516 | calculate needed space in the global offset table, procedure |
| 2517 | linkage table, and dynamic reloc sections. */ |
| 2518 | |
| 2519 | static bfd_boolean |
| 2520 | ppc64_elf_check_relocs (abfd, info, sec, relocs) |
| 2521 | bfd *abfd; |
| 2522 | struct bfd_link_info *info; |
| 2523 | asection *sec; |
| 2524 | const Elf_Internal_Rela *relocs; |
| 2525 | { |
| 2526 | struct ppc_link_hash_table *htab; |
| 2527 | Elf_Internal_Shdr *symtab_hdr; |
| 2528 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 2529 | const Elf_Internal_Rela *rel; |
| 2530 | const Elf_Internal_Rela *rel_end; |
| 2531 | asection *sreloc; |
| 2532 | asection **opd_sym_map; |
| 2533 | |
| 2534 | if (info->relocateable) |
| 2535 | return TRUE; |
| 2536 | |
| 2537 | htab = ppc_hash_table (info); |
| 2538 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2539 | |
| 2540 | sym_hashes = elf_sym_hashes (abfd); |
| 2541 | sym_hashes_end = (sym_hashes |
| 2542 | + symtab_hdr->sh_size / sizeof (Elf64_External_Sym) |
| 2543 | - symtab_hdr->sh_info); |
| 2544 | |
| 2545 | sreloc = NULL; |
| 2546 | opd_sym_map = NULL; |
| 2547 | if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0) |
| 2548 | { |
| 2549 | /* Garbage collection needs some extra help with .opd sections. |
| 2550 | We don't want to necessarily keep everything referenced by |
| 2551 | relocs in .opd, as that would keep all functions. Instead, |
| 2552 | if we reference an .opd symbol (a function descriptor), we |
| 2553 | want to keep the function code symbol's section. This is |
| 2554 | easy for global symbols, but for local syms we need to keep |
| 2555 | information about the associated function section. Later, if |
| 2556 | edit_opd deletes entries, we'll use this array to adjust |
| 2557 | local syms in .opd. */ |
| 2558 | union opd_info { |
| 2559 | asection *func_section; |
| 2560 | long entry_adjust; |
| 2561 | }; |
| 2562 | bfd_size_type amt; |
| 2563 | |
| 2564 | amt = sec->_raw_size * sizeof (union opd_info) / 24; |
| 2565 | opd_sym_map = (asection **) bfd_zalloc (abfd, amt); |
| 2566 | if (opd_sym_map == NULL) |
| 2567 | return FALSE; |
| 2568 | elf_section_data (sec)->tdata = opd_sym_map; |
| 2569 | } |
| 2570 | |
| 2571 | if (htab->elf.dynobj == NULL) |
| 2572 | htab->elf.dynobj = abfd; |
| 2573 | if (htab->sfpr == NULL |
| 2574 | && !create_linkage_sections (htab->elf.dynobj, info)) |
| 2575 | return FALSE; |
| 2576 | |
| 2577 | rel_end = relocs + sec->reloc_count; |
| 2578 | for (rel = relocs; rel < rel_end; rel++) |
| 2579 | { |
| 2580 | unsigned long r_symndx; |
| 2581 | struct elf_link_hash_entry *h; |
| 2582 | enum elf_ppc_reloc_type r_type; |
| 2583 | |
| 2584 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 2585 | if (r_symndx < symtab_hdr->sh_info) |
| 2586 | h = NULL; |
| 2587 | else |
| 2588 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2589 | |
| 2590 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| 2591 | switch (r_type) |
| 2592 | { |
| 2593 | /* GOT16 relocations */ |
| 2594 | case R_PPC64_GOT16: |
| 2595 | case R_PPC64_GOT16_DS: |
| 2596 | case R_PPC64_GOT16_HA: |
| 2597 | case R_PPC64_GOT16_HI: |
| 2598 | case R_PPC64_GOT16_LO: |
| 2599 | case R_PPC64_GOT16_LO_DS: |
| 2600 | |
| 2601 | /* This symbol requires a global offset table entry. */ |
| 2602 | if (htab->sgot == NULL |
| 2603 | && !create_got_section (htab->elf.dynobj, info)) |
| 2604 | return FALSE; |
| 2605 | |
| 2606 | if (h != NULL) |
| 2607 | { |
| 2608 | h->got.refcount += 1; |
| 2609 | } |
| 2610 | else |
| 2611 | { |
| 2612 | bfd_signed_vma *local_got_refcounts; |
| 2613 | |
| 2614 | /* This is a global offset table entry for a local symbol. */ |
| 2615 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2616 | if (local_got_refcounts == NULL) |
| 2617 | { |
| 2618 | bfd_size_type size; |
| 2619 | |
| 2620 | size = symtab_hdr->sh_info; |
| 2621 | size *= sizeof (bfd_signed_vma); |
| 2622 | local_got_refcounts = ((bfd_signed_vma *) |
| 2623 | bfd_zalloc (abfd, size)); |
| 2624 | if (local_got_refcounts == NULL) |
| 2625 | return FALSE; |
| 2626 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2627 | } |
| 2628 | local_got_refcounts[r_symndx] += 1; |
| 2629 | } |
| 2630 | break; |
| 2631 | |
| 2632 | case R_PPC64_PLT16_HA: |
| 2633 | case R_PPC64_PLT16_HI: |
| 2634 | case R_PPC64_PLT16_LO: |
| 2635 | case R_PPC64_PLT32: |
| 2636 | case R_PPC64_PLT64: |
| 2637 | /* This symbol requires a procedure linkage table entry. We |
| 2638 | actually build the entry in adjust_dynamic_symbol, |
| 2639 | because this might be a case of linking PIC code without |
| 2640 | linking in any dynamic objects, in which case we don't |
| 2641 | need to generate a procedure linkage table after all. */ |
| 2642 | if (h == NULL) |
| 2643 | { |
| 2644 | /* It does not make sense to have a procedure linkage |
| 2645 | table entry for a local symbol. */ |
| 2646 | bfd_set_error (bfd_error_bad_value); |
| 2647 | return FALSE; |
| 2648 | } |
| 2649 | |
| 2650 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2651 | h->plt.refcount += 1; |
| 2652 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| 2653 | break; |
| 2654 | |
| 2655 | /* The following relocations don't need to propagate the |
| 2656 | relocation if linking a shared object since they are |
| 2657 | section relative. */ |
| 2658 | case R_PPC64_SECTOFF: |
| 2659 | case R_PPC64_SECTOFF_LO: |
| 2660 | case R_PPC64_SECTOFF_HI: |
| 2661 | case R_PPC64_SECTOFF_HA: |
| 2662 | case R_PPC64_SECTOFF_DS: |
| 2663 | case R_PPC64_SECTOFF_LO_DS: |
| 2664 | case R_PPC64_TOC16: |
| 2665 | case R_PPC64_TOC16_LO: |
| 2666 | case R_PPC64_TOC16_HI: |
| 2667 | case R_PPC64_TOC16_HA: |
| 2668 | case R_PPC64_TOC16_DS: |
| 2669 | case R_PPC64_TOC16_LO_DS: |
| 2670 | break; |
| 2671 | |
| 2672 | /* This relocation describes the C++ object vtable hierarchy. |
| 2673 | Reconstruct it for later use during GC. */ |
| 2674 | case R_PPC64_GNU_VTINHERIT: |
| 2675 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 2676 | return FALSE; |
| 2677 | break; |
| 2678 | |
| 2679 | /* This relocation describes which C++ vtable entries are actually |
| 2680 | used. Record for later use during GC. */ |
| 2681 | case R_PPC64_GNU_VTENTRY: |
| 2682 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 2683 | return FALSE; |
| 2684 | break; |
| 2685 | |
| 2686 | case R_PPC64_REL14: |
| 2687 | case R_PPC64_REL14_BRTAKEN: |
| 2688 | case R_PPC64_REL14_BRNTAKEN: |
| 2689 | htab->has_14bit_branch = 1; |
| 2690 | /* Fall through. */ |
| 2691 | |
| 2692 | case R_PPC64_REL24: |
| 2693 | if (h != NULL |
| 2694 | && h->root.root.string[0] == '.' |
| 2695 | && h->root.root.string[1] != 0) |
| 2696 | { |
| 2697 | /* We may need a .plt entry if the function this reloc |
| 2698 | refers to is in a shared lib. */ |
| 2699 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2700 | h->plt.refcount += 1; |
| 2701 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| 2702 | } |
| 2703 | break; |
| 2704 | |
| 2705 | case R_PPC64_ADDR64: |
| 2706 | if (opd_sym_map != NULL |
| 2707 | && h != NULL |
| 2708 | && h->root.root.string[0] == '.' |
| 2709 | && h->root.root.string[1] != 0) |
| 2710 | { |
| 2711 | struct elf_link_hash_entry *fdh; |
| 2712 | |
| 2713 | fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, |
| 2714 | FALSE, FALSE, FALSE); |
| 2715 | if (fdh != NULL) |
| 2716 | { |
| 2717 | ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
| 2718 | ((struct ppc_link_hash_entry *) fdh)->oh = h; |
| 2719 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| 2720 | ((struct ppc_link_hash_entry *) h)->oh = fdh; |
| 2721 | } |
| 2722 | } |
| 2723 | if (opd_sym_map != NULL |
| 2724 | && h == NULL |
| 2725 | && rel + 1 < rel_end |
| 2726 | && ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info) |
| 2727 | == R_PPC64_TOC)) |
| 2728 | { |
| 2729 | asection *s; |
| 2730 | |
| 2731 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, |
| 2732 | r_symndx); |
| 2733 | if (s == NULL) |
| 2734 | return FALSE; |
| 2735 | else if (s != sec) |
| 2736 | opd_sym_map[rel->r_offset / 24] = s; |
| 2737 | } |
| 2738 | /* Fall through. */ |
| 2739 | |
| 2740 | case R_PPC64_REL64: |
| 2741 | case R_PPC64_REL32: |
| 2742 | case R_PPC64_ADDR14: |
| 2743 | case R_PPC64_ADDR14_BRNTAKEN: |
| 2744 | case R_PPC64_ADDR14_BRTAKEN: |
| 2745 | case R_PPC64_ADDR16: |
| 2746 | case R_PPC64_ADDR16_DS: |
| 2747 | case R_PPC64_ADDR16_HA: |
| 2748 | case R_PPC64_ADDR16_HI: |
| 2749 | case R_PPC64_ADDR16_HIGHER: |
| 2750 | case R_PPC64_ADDR16_HIGHERA: |
| 2751 | case R_PPC64_ADDR16_HIGHEST: |
| 2752 | case R_PPC64_ADDR16_HIGHESTA: |
| 2753 | case R_PPC64_ADDR16_LO: |
| 2754 | case R_PPC64_ADDR16_LO_DS: |
| 2755 | case R_PPC64_ADDR24: |
| 2756 | case R_PPC64_ADDR30: |
| 2757 | case R_PPC64_ADDR32: |
| 2758 | case R_PPC64_UADDR16: |
| 2759 | case R_PPC64_UADDR32: |
| 2760 | case R_PPC64_UADDR64: |
| 2761 | case R_PPC64_TOC: |
| 2762 | /* Don't propagate .opd relocs. */ |
| 2763 | if (NO_OPD_RELOCS && opd_sym_map != NULL) |
| 2764 | break; |
| 2765 | |
| 2766 | /* If we are creating a shared library, and this is a reloc |
| 2767 | against a global symbol, or a non PC relative reloc |
| 2768 | against a local symbol, then we need to copy the reloc |
| 2769 | into the shared library. However, if we are linking with |
| 2770 | -Bsymbolic, we do not need to copy a reloc against a |
| 2771 | global symbol which is defined in an object we are |
| 2772 | including in the link (i.e., DEF_REGULAR is set). At |
| 2773 | this point we have not seen all the input files, so it is |
| 2774 | possible that DEF_REGULAR is not set now but will be set |
| 2775 | later (it is never cleared). In case of a weak definition, |
| 2776 | DEF_REGULAR may be cleared later by a strong definition in |
| 2777 | a shared library. We account for that possibility below by |
| 2778 | storing information in the relocs_copied field of the hash |
| 2779 | table entry. A similar situation occurs when creating |
| 2780 | shared libraries and symbol visibility changes render the |
| 2781 | symbol local. |
| 2782 | |
| 2783 | If on the other hand, we are creating an executable, we |
| 2784 | may need to keep relocations for symbols satisfied by a |
| 2785 | dynamic library if we manage to avoid copy relocs for the |
| 2786 | symbol. */ |
| 2787 | if ((info->shared |
| 2788 | && (sec->flags & SEC_ALLOC) != 0 |
| 2789 | && (IS_ABSOLUTE_RELOC (r_type) |
| 2790 | || (h != NULL |
| 2791 | && (! info->symbolic |
| 2792 | || h->root.type == bfd_link_hash_defweak |
| 2793 | || (h->elf_link_hash_flags |
| 2794 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 2795 | || (!info->shared |
| 2796 | && (sec->flags & SEC_ALLOC) != 0 |
| 2797 | && h != NULL |
| 2798 | && (h->root.type == bfd_link_hash_defweak |
| 2799 | || (h->elf_link_hash_flags |
| 2800 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| 2801 | { |
| 2802 | struct ppc_dyn_relocs *p; |
| 2803 | struct ppc_dyn_relocs **head; |
| 2804 | |
| 2805 | /* We must copy these reloc types into the output file. |
| 2806 | Create a reloc section in dynobj and make room for |
| 2807 | this reloc. */ |
| 2808 | if (sreloc == NULL) |
| 2809 | { |
| 2810 | const char *name; |
| 2811 | bfd *dynobj; |
| 2812 | |
| 2813 | name = (bfd_elf_string_from_elf_section |
| 2814 | (abfd, |
| 2815 | elf_elfheader (abfd)->e_shstrndx, |
| 2816 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 2817 | if (name == NULL) |
| 2818 | return FALSE; |
| 2819 | |
| 2820 | if (strncmp (name, ".rela", 5) != 0 |
| 2821 | || strcmp (bfd_get_section_name (abfd, sec), |
| 2822 | name + 5) != 0) |
| 2823 | { |
| 2824 | (*_bfd_error_handler) |
| 2825 | (_("%s: bad relocation section name `%s\'"), |
| 2826 | bfd_archive_filename (abfd), name); |
| 2827 | bfd_set_error (bfd_error_bad_value); |
| 2828 | } |
| 2829 | |
| 2830 | dynobj = htab->elf.dynobj; |
| 2831 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 2832 | if (sreloc == NULL) |
| 2833 | { |
| 2834 | flagword flags; |
| 2835 | |
| 2836 | sreloc = bfd_make_section (dynobj, name); |
| 2837 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 2838 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2839 | if ((sec->flags & SEC_ALLOC) != 0) |
| 2840 | flags |= SEC_ALLOC | SEC_LOAD; |
| 2841 | if (sreloc == NULL |
| 2842 | || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| 2843 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
| 2844 | return FALSE; |
| 2845 | } |
| 2846 | elf_section_data (sec)->sreloc = sreloc; |
| 2847 | } |
| 2848 | |
| 2849 | /* If this is a global symbol, we count the number of |
| 2850 | relocations we need for this symbol. */ |
| 2851 | if (h != NULL) |
| 2852 | { |
| 2853 | head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; |
| 2854 | } |
| 2855 | else |
| 2856 | { |
| 2857 | /* Track dynamic relocs needed for local syms too. |
| 2858 | We really need local syms available to do this |
| 2859 | easily. Oh well. */ |
| 2860 | |
| 2861 | asection *s; |
| 2862 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| 2863 | sec, r_symndx); |
| 2864 | if (s == NULL) |
| 2865 | return FALSE; |
| 2866 | |
| 2867 | head = ((struct ppc_dyn_relocs **) |
| 2868 | &elf_section_data (s)->local_dynrel); |
| 2869 | } |
| 2870 | |
| 2871 | p = *head; |
| 2872 | if (p == NULL || p->sec != sec) |
| 2873 | { |
| 2874 | p = ((struct ppc_dyn_relocs *) |
| 2875 | bfd_alloc (htab->elf.dynobj, |
| 2876 | (bfd_size_type) sizeof *p)); |
| 2877 | if (p == NULL) |
| 2878 | return FALSE; |
| 2879 | p->next = *head; |
| 2880 | *head = p; |
| 2881 | p->sec = sec; |
| 2882 | p->count = 0; |
| 2883 | p->pc_count = 0; |
| 2884 | } |
| 2885 | |
| 2886 | p->count += 1; |
| 2887 | if (!IS_ABSOLUTE_RELOC (r_type)) |
| 2888 | p->pc_count += 1; |
| 2889 | } |
| 2890 | break; |
| 2891 | |
| 2892 | default: |
| 2893 | break; |
| 2894 | } |
| 2895 | } |
| 2896 | |
| 2897 | return TRUE; |
| 2898 | } |
| 2899 | |
| 2900 | /* Return the section that should be marked against GC for a given |
| 2901 | relocation. */ |
| 2902 | |
| 2903 | static asection * |
| 2904 | ppc64_elf_gc_mark_hook (sec, info, rel, h, sym) |
| 2905 | asection *sec; |
| 2906 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 2907 | Elf_Internal_Rela *rel; |
| 2908 | struct elf_link_hash_entry *h; |
| 2909 | Elf_Internal_Sym *sym; |
| 2910 | { |
| 2911 | asection *rsec = NULL; |
| 2912 | |
| 2913 | if (h != NULL) |
| 2914 | { |
| 2915 | enum elf_ppc_reloc_type r_type; |
| 2916 | struct ppc_link_hash_entry *fdh; |
| 2917 | |
| 2918 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| 2919 | switch (r_type) |
| 2920 | { |
| 2921 | case R_PPC64_GNU_VTINHERIT: |
| 2922 | case R_PPC64_GNU_VTENTRY: |
| 2923 | break; |
| 2924 | |
| 2925 | default: |
| 2926 | switch (h->root.type) |
| 2927 | { |
| 2928 | case bfd_link_hash_defined: |
| 2929 | case bfd_link_hash_defweak: |
| 2930 | fdh = (struct ppc_link_hash_entry *) h; |
| 2931 | |
| 2932 | /* Function descriptor syms cause the associated |
| 2933 | function code sym section to be marked. */ |
| 2934 | if (fdh->is_func_descriptor) |
| 2935 | rsec = fdh->oh->root.u.def.section; |
| 2936 | |
| 2937 | /* Function entry syms return NULL if they are in .opd |
| 2938 | and are not ._start (or others undefined on the ld |
| 2939 | command line). Thus we avoid marking all function |
| 2940 | sections, as all functions are referenced in .opd. */ |
| 2941 | else if ((fdh->oh != NULL |
| 2942 | && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry) |
| 2943 | || elf_section_data (sec)->tdata == NULL) |
| 2944 | rsec = h->root.u.def.section; |
| 2945 | break; |
| 2946 | |
| 2947 | case bfd_link_hash_common: |
| 2948 | rsec = h->root.u.c.p->section; |
| 2949 | break; |
| 2950 | |
| 2951 | default: |
| 2952 | break; |
| 2953 | } |
| 2954 | } |
| 2955 | } |
| 2956 | else |
| 2957 | { |
| 2958 | asection **opd_sym_section; |
| 2959 | |
| 2960 | rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 2961 | opd_sym_section = (asection **) elf_section_data (rsec)->tdata; |
| 2962 | if (opd_sym_section != NULL) |
| 2963 | rsec = opd_sym_section[sym->st_value / 24]; |
| 2964 | else if (elf_section_data (sec)->tdata != NULL) |
| 2965 | rsec = NULL; |
| 2966 | } |
| 2967 | |
| 2968 | return rsec; |
| 2969 | } |
| 2970 | |
| 2971 | /* Update the .got, .plt. and dynamic reloc reference counts for the |
| 2972 | section being removed. */ |
| 2973 | |
| 2974 | static bfd_boolean |
| 2975 | ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| 2976 | bfd *abfd; |
| 2977 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 2978 | asection *sec; |
| 2979 | const Elf_Internal_Rela *relocs; |
| 2980 | { |
| 2981 | Elf_Internal_Shdr *symtab_hdr; |
| 2982 | struct elf_link_hash_entry **sym_hashes; |
| 2983 | bfd_signed_vma *local_got_refcounts; |
| 2984 | const Elf_Internal_Rela *rel, *relend; |
| 2985 | |
| 2986 | elf_section_data (sec)->local_dynrel = NULL; |
| 2987 | |
| 2988 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2989 | sym_hashes = elf_sym_hashes (abfd); |
| 2990 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2991 | |
| 2992 | relend = relocs + sec->reloc_count; |
| 2993 | for (rel = relocs; rel < relend; rel++) |
| 2994 | { |
| 2995 | unsigned long r_symndx; |
| 2996 | enum elf_ppc_reloc_type r_type; |
| 2997 | struct elf_link_hash_entry *h; |
| 2998 | |
| 2999 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 3000 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| 3001 | switch (r_type) |
| 3002 | { |
| 3003 | case R_PPC64_GOT16: |
| 3004 | case R_PPC64_GOT16_DS: |
| 3005 | case R_PPC64_GOT16_HA: |
| 3006 | case R_PPC64_GOT16_HI: |
| 3007 | case R_PPC64_GOT16_LO: |
| 3008 | case R_PPC64_GOT16_LO_DS: |
| 3009 | if (r_symndx >= symtab_hdr->sh_info) |
| 3010 | { |
| 3011 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3012 | if (h->got.refcount > 0) |
| 3013 | h->got.refcount--; |
| 3014 | } |
| 3015 | else |
| 3016 | { |
| 3017 | if (local_got_refcounts[r_symndx] > 0) |
| 3018 | local_got_refcounts[r_symndx]--; |
| 3019 | } |
| 3020 | break; |
| 3021 | |
| 3022 | case R_PPC64_PLT16_HA: |
| 3023 | case R_PPC64_PLT16_HI: |
| 3024 | case R_PPC64_PLT16_LO: |
| 3025 | case R_PPC64_PLT32: |
| 3026 | case R_PPC64_PLT64: |
| 3027 | if (r_symndx >= symtab_hdr->sh_info) |
| 3028 | { |
| 3029 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3030 | if (h->plt.refcount > 0) |
| 3031 | h->plt.refcount--; |
| 3032 | } |
| 3033 | break; |
| 3034 | |
| 3035 | case R_PPC64_REL14: |
| 3036 | case R_PPC64_REL14_BRNTAKEN: |
| 3037 | case R_PPC64_REL14_BRTAKEN: |
| 3038 | case R_PPC64_REL24: |
| 3039 | if (r_symndx >= symtab_hdr->sh_info) |
| 3040 | { |
| 3041 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3042 | if (h->plt.refcount > 0) |
| 3043 | h->plt.refcount--; |
| 3044 | } |
| 3045 | break; |
| 3046 | |
| 3047 | case R_PPC64_REL32: |
| 3048 | case R_PPC64_REL64: |
| 3049 | if (r_symndx >= symtab_hdr->sh_info) |
| 3050 | { |
| 3051 | struct ppc_link_hash_entry *eh; |
| 3052 | struct ppc_dyn_relocs **pp; |
| 3053 | struct ppc_dyn_relocs *p; |
| 3054 | |
| 3055 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3056 | eh = (struct ppc_link_hash_entry *) h; |
| 3057 | |
| 3058 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 3059 | if (p->sec == sec) |
| 3060 | { |
| 3061 | p->pc_count -= 1; |
| 3062 | p->count -= 1; |
| 3063 | if (p->count == 0) |
| 3064 | *pp = p->next; |
| 3065 | break; |
| 3066 | } |
| 3067 | } |
| 3068 | break; |
| 3069 | |
| 3070 | case R_PPC64_ADDR14: |
| 3071 | case R_PPC64_ADDR14_BRNTAKEN: |
| 3072 | case R_PPC64_ADDR14_BRTAKEN: |
| 3073 | case R_PPC64_ADDR16: |
| 3074 | case R_PPC64_ADDR16_DS: |
| 3075 | case R_PPC64_ADDR16_HA: |
| 3076 | case R_PPC64_ADDR16_HI: |
| 3077 | case R_PPC64_ADDR16_HIGHER: |
| 3078 | case R_PPC64_ADDR16_HIGHERA: |
| 3079 | case R_PPC64_ADDR16_HIGHEST: |
| 3080 | case R_PPC64_ADDR16_HIGHESTA: |
| 3081 | case R_PPC64_ADDR16_LO: |
| 3082 | case R_PPC64_ADDR16_LO_DS: |
| 3083 | case R_PPC64_ADDR24: |
| 3084 | case R_PPC64_ADDR30: |
| 3085 | case R_PPC64_ADDR32: |
| 3086 | case R_PPC64_ADDR64: |
| 3087 | case R_PPC64_UADDR16: |
| 3088 | case R_PPC64_UADDR32: |
| 3089 | case R_PPC64_UADDR64: |
| 3090 | case R_PPC64_TOC: |
| 3091 | if (r_symndx >= symtab_hdr->sh_info) |
| 3092 | { |
| 3093 | struct ppc_link_hash_entry *eh; |
| 3094 | struct ppc_dyn_relocs **pp; |
| 3095 | struct ppc_dyn_relocs *p; |
| 3096 | |
| 3097 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3098 | eh = (struct ppc_link_hash_entry *) h; |
| 3099 | |
| 3100 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 3101 | if (p->sec == sec) |
| 3102 | { |
| 3103 | p->count -= 1; |
| 3104 | if (p->count == 0) |
| 3105 | *pp = p->next; |
| 3106 | break; |
| 3107 | } |
| 3108 | } |
| 3109 | break; |
| 3110 | |
| 3111 | default: |
| 3112 | break; |
| 3113 | } |
| 3114 | } |
| 3115 | return TRUE; |
| 3116 | } |
| 3117 | |
| 3118 | /* Called via elf_link_hash_traverse to transfer dynamic linking |
| 3119 | information on function code symbol entries to their corresponding |
| 3120 | function descriptor symbol entries. */ |
| 3121 | static bfd_boolean |
| 3122 | func_desc_adjust (h, inf) |
| 3123 | struct elf_link_hash_entry *h; |
| 3124 | PTR inf; |
| 3125 | { |
| 3126 | struct bfd_link_info *info; |
| 3127 | struct ppc_link_hash_table *htab; |
| 3128 | |
| 3129 | if (h->root.type == bfd_link_hash_indirect) |
| 3130 | return TRUE; |
| 3131 | |
| 3132 | if (h->root.type == bfd_link_hash_warning) |
| 3133 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3134 | |
| 3135 | info = (struct bfd_link_info *) inf; |
| 3136 | htab = ppc_hash_table (info); |
| 3137 | |
| 3138 | /* If this is a function code symbol, transfer dynamic linking |
| 3139 | information to the function descriptor symbol. */ |
| 3140 | if (!((struct ppc_link_hash_entry *) h)->is_func) |
| 3141 | return TRUE; |
| 3142 | |
| 3143 | if (h->root.type == bfd_link_hash_undefweak |
| 3144 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR)) |
| 3145 | htab->have_undefweak = TRUE; |
| 3146 | |
| 3147 | if (h->plt.refcount > 0 |
| 3148 | && h->root.root.string[0] == '.' |
| 3149 | && h->root.root.string[1] != '\0') |
| 3150 | { |
| 3151 | struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh; |
| 3152 | bfd_boolean force_local; |
| 3153 | |
| 3154 | /* Find the corresponding function descriptor symbol. Create it |
| 3155 | as undefined if necessary. */ |
| 3156 | |
| 3157 | if (fdh == NULL) |
| 3158 | fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, |
| 3159 | FALSE, FALSE, TRUE); |
| 3160 | |
| 3161 | if (fdh == NULL |
| 3162 | && info->shared |
| 3163 | && (h->root.type == bfd_link_hash_undefined |
| 3164 | || h->root.type == bfd_link_hash_undefweak)) |
| 3165 | { |
| 3166 | bfd *abfd; |
| 3167 | asymbol *newsym; |
| 3168 | struct bfd_link_hash_entry *bh; |
| 3169 | |
| 3170 | abfd = h->root.u.undef.abfd; |
| 3171 | newsym = bfd_make_empty_symbol (abfd); |
| 3172 | newsym->name = h->root.root.string + 1; |
| 3173 | newsym->section = bfd_und_section_ptr; |
| 3174 | newsym->value = 0; |
| 3175 | newsym->flags = BSF_OBJECT; |
| 3176 | if (h->root.type == bfd_link_hash_undefweak) |
| 3177 | newsym->flags |= BSF_WEAK; |
| 3178 | |
| 3179 | bh = &fdh->root; |
| 3180 | if ( !(_bfd_generic_link_add_one_symbol |
| 3181 | (info, abfd, newsym->name, newsym->flags, |
| 3182 | newsym->section, newsym->value, NULL, FALSE, FALSE, &bh))) |
| 3183 | { |
| 3184 | return FALSE; |
| 3185 | } |
| 3186 | fdh = (struct elf_link_hash_entry *) bh; |
| 3187 | fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
| 3188 | } |
| 3189 | |
| 3190 | if (fdh != NULL |
| 3191 | && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 |
| 3192 | && (info->shared |
| 3193 | || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 3194 | || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) |
| 3195 | { |
| 3196 | if (fdh->dynindx == -1) |
| 3197 | if (! bfd_elf64_link_record_dynamic_symbol (info, fdh)) |
| 3198 | return FALSE; |
| 3199 | fdh->elf_link_hash_flags |= (h->elf_link_hash_flags |
| 3200 | & (ELF_LINK_HASH_REF_REGULAR |
| 3201 | | ELF_LINK_HASH_REF_DYNAMIC |
| 3202 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK |
| 3203 | | ELF_LINK_NON_GOT_REF)); |
| 3204 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 3205 | { |
| 3206 | fdh->plt.refcount = h->plt.refcount; |
| 3207 | fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 3208 | } |
| 3209 | ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
| 3210 | ((struct ppc_link_hash_entry *) fdh)->oh = h; |
| 3211 | ((struct ppc_link_hash_entry *) h)->oh = fdh; |
| 3212 | } |
| 3213 | |
| 3214 | /* Now that the info is on the function descriptor, clear the |
| 3215 | function code sym info. Any function code syms for which we |
| 3216 | don't have a definition in a regular file, we force local. |
| 3217 | This prevents a shared library from exporting syms that have |
| 3218 | been imported from another library. Function code syms that |
| 3219 | are really in the library we must leave global to prevent the |
| 3220 | linker dragging in a definition from a static library. */ |
| 3221 | force_local = (info->shared |
| 3222 | && ((h->elf_link_hash_flags |
| 3223 | & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| 3224 | || fdh == NULL |
| 3225 | || (fdh->elf_link_hash_flags |
| 3226 | & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| 3227 | || (fdh->elf_link_hash_flags |
| 3228 | & ELF_LINK_FORCED_LOCAL) != 0)); |
| 3229 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| 3230 | } |
| 3231 | |
| 3232 | return TRUE; |
| 3233 | } |
| 3234 | |
| 3235 | #define MIN_SAVE_FPR 14 |
| 3236 | #define MAX_SAVE_FPR 31 |
| 3237 | |
| 3238 | /* Called near the start of bfd_elf_size_dynamic_sections. We use |
| 3239 | this hook to a) provide some gcc support functions, and b) transfer |
| 3240 | dynamic linking information gathered so far on function code symbol |
| 3241 | entries, to their corresponding function descriptor symbol entries. */ |
| 3242 | static bfd_boolean |
| 3243 | ppc64_elf_func_desc_adjust (obfd, info) |
| 3244 | bfd *obfd ATTRIBUTE_UNUSED; |
| 3245 | struct bfd_link_info *info; |
| 3246 | { |
| 3247 | struct ppc_link_hash_table *htab; |
| 3248 | unsigned int lowest_savef = MAX_SAVE_FPR + 2; |
| 3249 | unsigned int lowest_restf = MAX_SAVE_FPR + 2; |
| 3250 | unsigned int i; |
| 3251 | struct elf_link_hash_entry *h; |
| 3252 | bfd_byte *p; |
| 3253 | char sym[10]; |
| 3254 | |
| 3255 | htab = ppc_hash_table (info); |
| 3256 | |
| 3257 | if (htab->sfpr == NULL) |
| 3258 | /* We don't have any relocs. */ |
| 3259 | return TRUE; |
| 3260 | |
| 3261 | /* First provide any missing ._savef* and ._restf* functions. */ |
| 3262 | memcpy (sym, "._savef14", 10); |
| 3263 | for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) |
| 3264 | { |
| 3265 | sym[7] = i / 10 + '0'; |
| 3266 | sym[8] = i % 10 + '0'; |
| 3267 | h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); |
| 3268 | if (h != NULL |
| 3269 | && h->root.type == bfd_link_hash_undefined) |
| 3270 | { |
| 3271 | if (lowest_savef > i) |
| 3272 | lowest_savef = i; |
| 3273 | h->root.type = bfd_link_hash_defined; |
| 3274 | h->root.u.def.section = htab->sfpr; |
| 3275 | h->root.u.def.value = (i - lowest_savef) * 4; |
| 3276 | h->type = STT_FUNC; |
| 3277 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 3278 | _bfd_elf_link_hash_hide_symbol (info, h, info->shared); |
| 3279 | } |
| 3280 | } |
| 3281 | |
| 3282 | memcpy (sym, "._restf14", 10); |
| 3283 | for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) |
| 3284 | { |
| 3285 | sym[7] = i / 10 + '0'; |
| 3286 | sym[8] = i % 10 + '0'; |
| 3287 | h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); |
| 3288 | if (h != NULL |
| 3289 | && h->root.type == bfd_link_hash_undefined) |
| 3290 | { |
| 3291 | if (lowest_restf > i) |
| 3292 | lowest_restf = i; |
| 3293 | h->root.type = bfd_link_hash_defined; |
| 3294 | h->root.u.def.section = htab->sfpr; |
| 3295 | h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
| 3296 | + (i - lowest_restf) * 4); |
| 3297 | h->type = STT_FUNC; |
| 3298 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 3299 | _bfd_elf_link_hash_hide_symbol (info, h, info->shared); |
| 3300 | } |
| 3301 | } |
| 3302 | |
| 3303 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info); |
| 3304 | |
| 3305 | htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
| 3306 | + (MAX_SAVE_FPR + 2 - lowest_restf) * 4); |
| 3307 | |
| 3308 | if (htab->sfpr->_raw_size == 0) |
| 3309 | { |
| 3310 | if (!htab->have_undefweak) |
| 3311 | { |
| 3312 | _bfd_strip_section_from_output (info, htab->sfpr); |
| 3313 | return TRUE; |
| 3314 | } |
| 3315 | |
| 3316 | htab->sfpr->_raw_size = 4; |
| 3317 | } |
| 3318 | |
| 3319 | p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size); |
| 3320 | if (p == NULL) |
| 3321 | return FALSE; |
| 3322 | htab->sfpr->contents = p; |
| 3323 | |
| 3324 | for (i = lowest_savef; i <= MAX_SAVE_FPR; i++) |
| 3325 | { |
| 3326 | unsigned int fpr = i << 21; |
| 3327 | unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; |
| 3328 | bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p); |
| 3329 | p += 4; |
| 3330 | } |
| 3331 | if (lowest_savef <= MAX_SAVE_FPR) |
| 3332 | { |
| 3333 | bfd_put_32 (htab->elf.dynobj, BLR, p); |
| 3334 | p += 4; |
| 3335 | } |
| 3336 | |
| 3337 | for (i = lowest_restf; i <= MAX_SAVE_FPR; i++) |
| 3338 | { |
| 3339 | unsigned int fpr = i << 21; |
| 3340 | unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; |
| 3341 | bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p); |
| 3342 | p += 4; |
| 3343 | } |
| 3344 | if (lowest_restf <= MAX_SAVE_FPR |
| 3345 | || htab->sfpr->_raw_size == 4) |
| 3346 | { |
| 3347 | bfd_put_32 (htab->elf.dynobj, BLR, p); |
| 3348 | } |
| 3349 | |
| 3350 | return TRUE; |
| 3351 | } |
| 3352 | |
| 3353 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 3354 | regular object. The current definition is in some section of the |
| 3355 | dynamic object, but we're not including those sections. We have to |
| 3356 | change the definition to something the rest of the link can |
| 3357 | understand. */ |
| 3358 | |
| 3359 | static bfd_boolean |
| 3360 | ppc64_elf_adjust_dynamic_symbol (info, h) |
| 3361 | struct bfd_link_info *info; |
| 3362 | struct elf_link_hash_entry *h; |
| 3363 | { |
| 3364 | struct ppc_link_hash_table *htab; |
| 3365 | struct ppc_link_hash_entry * eh; |
| 3366 | struct ppc_dyn_relocs *p; |
| 3367 | asection *s; |
| 3368 | unsigned int power_of_two; |
| 3369 | |
| 3370 | htab = ppc_hash_table (info); |
| 3371 | |
| 3372 | /* Deal with function syms. */ |
| 3373 | if (h->type == STT_FUNC |
| 3374 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 3375 | { |
| 3376 | /* Clear procedure linkage table information for any symbol that |
| 3377 | won't need a .plt entry. */ |
| 3378 | if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor |
| 3379 | || h->plt.refcount <= 0 |
| 3380 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| 3381 | || (! info->shared |
| 3382 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| 3383 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)) |
| 3384 | { |
| 3385 | h->plt.offset = (bfd_vma) -1; |
| 3386 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 3387 | } |
| 3388 | return TRUE; |
| 3389 | } |
| 3390 | else |
| 3391 | h->plt.offset = (bfd_vma) -1; |
| 3392 | |
| 3393 | /* If this is a weak symbol, and there is a real definition, the |
| 3394 | processor independent code will have arranged for us to see the |
| 3395 | real definition first, and we can just use the same value. */ |
| 3396 | if (h->weakdef != NULL) |
| 3397 | { |
| 3398 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 3399 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 3400 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 3401 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 3402 | return TRUE; |
| 3403 | } |
| 3404 | |
| 3405 | /* This is a reference to a symbol defined by a dynamic object which |
| 3406 | is not a function. */ |
| 3407 | |
| 3408 | /* If we are creating a shared library, we must presume that the |
| 3409 | only references to the symbol are via the global offset table. |
| 3410 | For such cases we need not do anything here; the relocations will |
| 3411 | be handled correctly by relocate_section. */ |
| 3412 | if (info->shared) |
| 3413 | return TRUE; |
| 3414 | |
| 3415 | /* If there are no references to this symbol that do not use the |
| 3416 | GOT, we don't need to generate a copy reloc. */ |
| 3417 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| 3418 | return TRUE; |
| 3419 | |
| 3420 | eh = (struct ppc_link_hash_entry *) h; |
| 3421 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 3422 | { |
| 3423 | s = p->sec->output_section; |
| 3424 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 3425 | break; |
| 3426 | } |
| 3427 | |
| 3428 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 3429 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 3430 | if (p == NULL) |
| 3431 | { |
| 3432 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| 3433 | return TRUE; |
| 3434 | } |
| 3435 | |
| 3436 | /* We must allocate the symbol in our .dynbss section, which will |
| 3437 | become part of the .bss section of the executable. There will be |
| 3438 | an entry for this symbol in the .dynsym section. The dynamic |
| 3439 | object will contain position independent code, so all references |
| 3440 | from the dynamic object to this symbol will go through the global |
| 3441 | offset table. The dynamic linker will use the .dynsym entry to |
| 3442 | determine the address it must put in the global offset table, so |
| 3443 | both the dynamic object and the regular object will refer to the |
| 3444 | same memory location for the variable. */ |
| 3445 | |
| 3446 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 3447 | copy the initial value out of the dynamic object and into the |
| 3448 | runtime process image. We need to remember the offset into the |
| 3449 | .rela.bss section we are going to use. */ |
| 3450 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 3451 | { |
| 3452 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
| 3453 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 3454 | } |
| 3455 | |
| 3456 | /* We need to figure out the alignment required for this symbol. I |
| 3457 | have no idea how ELF linkers handle this. */ |
| 3458 | power_of_two = bfd_log2 (h->size); |
| 3459 | if (power_of_two > 4) |
| 3460 | power_of_two = 4; |
| 3461 | |
| 3462 | /* Apply the required alignment. */ |
| 3463 | s = htab->sdynbss; |
| 3464 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
| 3465 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| 3466 | { |
| 3467 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| 3468 | return FALSE; |
| 3469 | } |
| 3470 | |
| 3471 | /* Define the symbol as being at this point in the section. */ |
| 3472 | h->root.u.def.section = s; |
| 3473 | h->root.u.def.value = s->_raw_size; |
| 3474 | |
| 3475 | /* Increment the section size to make room for the symbol. */ |
| 3476 | s->_raw_size += h->size; |
| 3477 | |
| 3478 | return TRUE; |
| 3479 | } |
| 3480 | |
| 3481 | /* If given a function descriptor symbol, hide both the function code |
| 3482 | sym and the descriptor. */ |
| 3483 | static void |
| 3484 | ppc64_elf_hide_symbol (info, h, force_local) |
| 3485 | struct bfd_link_info *info; |
| 3486 | struct elf_link_hash_entry *h; |
| 3487 | bfd_boolean force_local; |
| 3488 | { |
| 3489 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| 3490 | |
| 3491 | if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) |
| 3492 | { |
| 3493 | struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh; |
| 3494 | |
| 3495 | if (fh == NULL) |
| 3496 | { |
| 3497 | const char *p, *q; |
| 3498 | struct ppc_link_hash_table *htab; |
| 3499 | char save; |
| 3500 | |
| 3501 | /* We aren't supposed to use alloca in BFD because on |
| 3502 | systems which do not have alloca the version in libiberty |
| 3503 | calls xmalloc, which might cause the program to crash |
| 3504 | when it runs out of memory. This function doesn't have a |
| 3505 | return status, so there's no way to gracefully return an |
| 3506 | error. So cheat. We know that string[-1] can be safely |
| 3507 | dereferenced; It's either a string in an ELF string |
| 3508 | table, or allocated in an objalloc structure. */ |
| 3509 | |
| 3510 | p = h->root.root.string - 1; |
| 3511 | save = *p; |
| 3512 | *(char *) p = '.'; |
| 3513 | htab = ppc_hash_table (info); |
| 3514 | fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); |
| 3515 | *(char *) p = save; |
| 3516 | |
| 3517 | /* Unfortunately, if it so happens that the string we were |
| 3518 | looking for was allocated immediately before this string, |
| 3519 | then we overwrote the string terminator. That's the only |
| 3520 | reason the lookup should fail. */ |
| 3521 | if (fh == NULL) |
| 3522 | { |
| 3523 | q = h->root.root.string + strlen (h->root.root.string); |
| 3524 | while (q >= h->root.root.string && *q == *p) |
| 3525 | --q, --p; |
| 3526 | if (q < h->root.root.string && *p == '.') |
| 3527 | fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); |
| 3528 | } |
| 3529 | if (fh != NULL) |
| 3530 | { |
| 3531 | ((struct ppc_link_hash_entry *) h)->oh = fh; |
| 3532 | ((struct ppc_link_hash_entry *) fh)->oh = h; |
| 3533 | } |
| 3534 | } |
| 3535 | if (fh != NULL) |
| 3536 | _bfd_elf_link_hash_hide_symbol (info, fh, force_local); |
| 3537 | } |
| 3538 | } |
| 3539 | |
| 3540 | bfd_boolean |
| 3541 | ppc64_elf_edit_opd (obfd, info) |
| 3542 | bfd *obfd; |
| 3543 | struct bfd_link_info *info; |
| 3544 | { |
| 3545 | bfd *ibfd; |
| 3546 | unsigned int bfd_indx; |
| 3547 | |
| 3548 | for (bfd_indx = 0, ibfd = info->input_bfds; |
| 3549 | ibfd != NULL; |
| 3550 | ibfd = ibfd->link_next, bfd_indx++) |
| 3551 | { |
| 3552 | asection *sec; |
| 3553 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 3554 | Elf_Internal_Shdr *symtab_hdr; |
| 3555 | Elf_Internal_Sym *local_syms; |
| 3556 | struct elf_link_hash_entry **sym_hashes; |
| 3557 | bfd_vma offset; |
| 3558 | bfd_size_type amt; |
| 3559 | long *adjust; |
| 3560 | bfd_boolean need_edit; |
| 3561 | |
| 3562 | sec = bfd_get_section_by_name (ibfd, ".opd"); |
| 3563 | if (sec == NULL) |
| 3564 | continue; |
| 3565 | |
| 3566 | amt = sec->_raw_size * sizeof (long) / 24; |
| 3567 | adjust = (long *) elf_section_data (sec)->tdata; |
| 3568 | if (adjust == NULL) |
| 3569 | { |
| 3570 | /* Must be a ld -r link. ie. check_relocs hasn't been |
| 3571 | called. */ |
| 3572 | adjust = (long *) bfd_zalloc (obfd, amt); |
| 3573 | elf_section_data (sec)->tdata = adjust; |
| 3574 | } |
| 3575 | memset (adjust, 0, (size_t) amt); |
| 3576 | |
| 3577 | if (sec->output_section == bfd_abs_section_ptr) |
| 3578 | continue; |
| 3579 | |
| 3580 | /* Look through the section relocs. */ |
| 3581 | if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) |
| 3582 | continue; |
| 3583 | |
| 3584 | local_syms = NULL; |
| 3585 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 3586 | sym_hashes = elf_sym_hashes (ibfd); |
| 3587 | |
| 3588 | /* Read the relocations. */ |
| 3589 | relstart = _bfd_elf64_link_read_relocs (ibfd, sec, (PTR) NULL, |
| 3590 | (Elf_Internal_Rela *) NULL, |
| 3591 | info->keep_memory); |
| 3592 | if (relstart == NULL) |
| 3593 | return FALSE; |
| 3594 | |
| 3595 | /* First run through the relocs to check they are sane, and to |
| 3596 | determine whether we need to edit this opd section. */ |
| 3597 | need_edit = FALSE; |
| 3598 | offset = 0; |
| 3599 | relend = relstart + sec->reloc_count; |
| 3600 | for (rel = relstart; rel < relend; rel++) |
| 3601 | { |
| 3602 | enum elf_ppc_reloc_type r_type; |
| 3603 | unsigned long r_symndx; |
| 3604 | asection *sym_sec; |
| 3605 | struct elf_link_hash_entry *h; |
| 3606 | Elf_Internal_Sym *sym; |
| 3607 | |
| 3608 | /* .opd contains a regular array of 24 byte entries. We're |
| 3609 | only interested in the reloc pointing to a function entry |
| 3610 | point. */ |
| 3611 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| 3612 | if (r_type == R_PPC64_TOC) |
| 3613 | continue; |
| 3614 | |
| 3615 | if (r_type != R_PPC64_ADDR64) |
| 3616 | { |
| 3617 | (*_bfd_error_handler) |
| 3618 | (_("%s: unexpected reloc type %u in .opd section"), |
| 3619 | bfd_archive_filename (ibfd), r_type); |
| 3620 | need_edit = FALSE; |
| 3621 | break; |
| 3622 | } |
| 3623 | |
| 3624 | if (rel + 1 >= relend) |
| 3625 | continue; |
| 3626 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info); |
| 3627 | if (r_type != R_PPC64_TOC) |
| 3628 | continue; |
| 3629 | |
| 3630 | if (rel->r_offset != offset) |
| 3631 | { |
| 3632 | /* If someone messes with .opd alignment then after a |
| 3633 | "ld -r" we might have padding in the middle of .opd. |
| 3634 | Also, there's nothing to prevent someone putting |
| 3635 | something silly in .opd with the assembler. No .opd |
| 3636 | optimization for them! */ |
| 3637 | (*_bfd_error_handler) |
| 3638 | (_("%s: .opd is not a regular array of opd entries"), |
| 3639 | bfd_archive_filename (ibfd)); |
| 3640 | need_edit = FALSE; |
| 3641 | break; |
| 3642 | } |
| 3643 | |
| 3644 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 3645 | sym_sec = NULL; |
| 3646 | h = NULL; |
| 3647 | sym = NULL; |
| 3648 | if (r_symndx >= symtab_hdr->sh_info) |
| 3649 | { |
| 3650 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3651 | while (h->root.type == bfd_link_hash_indirect |
| 3652 | || h->root.type == bfd_link_hash_warning) |
| 3653 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3654 | if (h->root.type == bfd_link_hash_defined |
| 3655 | || h->root.type == bfd_link_hash_defweak) |
| 3656 | sym_sec = h->root.u.def.section; |
| 3657 | } |
| 3658 | else |
| 3659 | { |
| 3660 | if (local_syms == NULL) |
| 3661 | { |
| 3662 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3663 | if (local_syms == NULL) |
| 3664 | local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 3665 | symtab_hdr->sh_info, 0, |
| 3666 | NULL, NULL, NULL); |
| 3667 | if (local_syms == NULL) |
| 3668 | goto error_free_rel; |
| 3669 | } |
| 3670 | sym = local_syms + r_symndx; |
| 3671 | if ((sym->st_shndx != SHN_UNDEF |
| 3672 | && sym->st_shndx < SHN_LORESERVE) |
| 3673 | || sym->st_shndx > SHN_HIRESERVE) |
| 3674 | sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
| 3675 | } |
| 3676 | |
| 3677 | if (sym_sec == NULL || sym_sec->owner == NULL) |
| 3678 | { |
| 3679 | (*_bfd_error_handler) |
| 3680 | (_("%s: undefined sym `%s' in .opd section"), |
| 3681 | bfd_archive_filename (ibfd), |
| 3682 | h != NULL ? h->root.root.string : "<local symbol>"); |
| 3683 | need_edit = FALSE; |
| 3684 | break; |
| 3685 | } |
| 3686 | |
| 3687 | /* opd entries are always for functions defined in the |
| 3688 | current input bfd. If the symbol isn't defined in the |
| 3689 | input bfd, then we won't be using the function in this |
| 3690 | bfd; It must be defined in a linkonce section in another |
| 3691 | bfd, or is weak. It's also possible that we are |
| 3692 | discarding the function due to a linker script /DISCARD/, |
| 3693 | which we test for via the output_section. */ |
| 3694 | if (sym_sec->owner != ibfd |
| 3695 | || sym_sec->output_section == bfd_abs_section_ptr) |
| 3696 | need_edit = TRUE; |
| 3697 | |
| 3698 | offset += 24; |
| 3699 | } |
| 3700 | |
| 3701 | if (need_edit) |
| 3702 | { |
| 3703 | Elf_Internal_Rela *write_rel; |
| 3704 | bfd_byte *rptr, *wptr; |
| 3705 | bfd_boolean skip; |
| 3706 | |
| 3707 | /* This seems a waste of time as input .opd sections are all |
| 3708 | zeros as generated by gcc, but I suppose there's no reason |
| 3709 | this will always be so. We might start putting something in |
| 3710 | the third word of .opd entries. */ |
| 3711 | if ((sec->flags & SEC_IN_MEMORY) == 0) |
| 3712 | { |
| 3713 | bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size); |
| 3714 | if (loc == NULL |
| 3715 | || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0, |
| 3716 | sec->_raw_size)) |
| 3717 | { |
| 3718 | if (local_syms != NULL |
| 3719 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 3720 | free (local_syms); |
| 3721 | error_free_rel: |
| 3722 | if (elf_section_data (sec)->relocs != relstart) |
| 3723 | free (relstart); |
| 3724 | return FALSE; |
| 3725 | } |
| 3726 | sec->contents = loc; |
| 3727 | sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
| 3728 | } |
| 3729 | |
| 3730 | elf_section_data (sec)->relocs = relstart; |
| 3731 | |
| 3732 | wptr = sec->contents; |
| 3733 | rptr = sec->contents; |
| 3734 | write_rel = relstart; |
| 3735 | skip = FALSE; |
| 3736 | offset = 0; |
| 3737 | for (rel = relstart; rel < relend; rel++) |
| 3738 | { |
| 3739 | if (rel->r_offset == offset) |
| 3740 | { |
| 3741 | unsigned long r_symndx; |
| 3742 | asection *sym_sec; |
| 3743 | struct elf_link_hash_entry *h; |
| 3744 | Elf_Internal_Sym *sym; |
| 3745 | |
| 3746 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 3747 | sym_sec = NULL; |
| 3748 | h = NULL; |
| 3749 | sym = NULL; |
| 3750 | if (r_symndx >= symtab_hdr->sh_info) |
| 3751 | { |
| 3752 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3753 | while (h->root.type == bfd_link_hash_indirect |
| 3754 | || h->root.type == bfd_link_hash_warning) |
| 3755 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3756 | if (h->root.type == bfd_link_hash_defined |
| 3757 | || h->root.type == bfd_link_hash_defweak) |
| 3758 | sym_sec = h->root.u.def.section; |
| 3759 | } |
| 3760 | else |
| 3761 | { |
| 3762 | sym = local_syms + r_symndx; |
| 3763 | if ((sym->st_shndx != SHN_UNDEF |
| 3764 | && sym->st_shndx < SHN_LORESERVE) |
| 3765 | || sym->st_shndx > SHN_HIRESERVE) |
| 3766 | sym_sec = bfd_section_from_elf_index (ibfd, |
| 3767 | sym->st_shndx); |
| 3768 | } |
| 3769 | |
| 3770 | skip = (sym_sec->owner != ibfd |
| 3771 | || sym_sec->output_section == bfd_abs_section_ptr); |
| 3772 | if (skip) |
| 3773 | { |
| 3774 | if (h != NULL && sym_sec->owner == ibfd) |
| 3775 | { |
| 3776 | /* Arrange for the function descriptor sym |
| 3777 | to be dropped. */ |
| 3778 | struct ppc_link_hash_entry *fdh; |
| 3779 | struct ppc_link_hash_entry *fh; |
| 3780 | |
| 3781 | fh = (struct ppc_link_hash_entry *) h; |
| 3782 | fdh = (struct ppc_link_hash_entry *) fh->oh; |
| 3783 | if (fdh == NULL) |
| 3784 | { |
| 3785 | const char *fd_name; |
| 3786 | struct ppc_link_hash_table *htab; |
| 3787 | |
| 3788 | fd_name = h->root.root.string + 1; |
| 3789 | htab = ppc_hash_table (info); |
| 3790 | fdh = (struct ppc_link_hash_entry *) |
| 3791 | elf_link_hash_lookup (&htab->elf, fd_name, |
| 3792 | FALSE, FALSE, FALSE); |
| 3793 | fdh->is_func_descriptor = 1; |
| 3794 | fdh->oh = &fh->elf; |
| 3795 | fh->is_func = 1; |
| 3796 | fh->oh = &fdh->elf; |
| 3797 | } |
| 3798 | |
| 3799 | fdh->elf.root.u.def.value = 0; |
| 3800 | fdh->elf.root.u.def.section = sym_sec; |
| 3801 | } |
| 3802 | } |
| 3803 | else |
| 3804 | { |
| 3805 | /* We'll be keeping this opd entry. */ |
| 3806 | |
| 3807 | if (h != NULL) |
| 3808 | { |
| 3809 | /* Redefine the function descriptor symbol |
| 3810 | to this location in the opd section. |
| 3811 | We've checked above that opd relocs are |
| 3812 | ordered. */ |
| 3813 | struct ppc_link_hash_entry *fdh; |
| 3814 | struct ppc_link_hash_entry *fh; |
| 3815 | |
| 3816 | fh = (struct ppc_link_hash_entry *) h; |
| 3817 | fdh = (struct ppc_link_hash_entry *) fh->oh; |
| 3818 | if (fdh == NULL) |
| 3819 | { |
| 3820 | const char *fd_name; |
| 3821 | struct ppc_link_hash_table *htab; |
| 3822 | |
| 3823 | fd_name = h->root.root.string + 1; |
| 3824 | htab = ppc_hash_table (info); |
| 3825 | fdh = (struct ppc_link_hash_entry *) |
| 3826 | elf_link_hash_lookup (&htab->elf, fd_name, |
| 3827 | FALSE, FALSE, FALSE); |
| 3828 | fdh->is_func_descriptor = 1; |
| 3829 | fdh->oh = &fh->elf; |
| 3830 | fh->is_func = 1; |
| 3831 | fh->oh = &fdh->elf; |
| 3832 | } |
| 3833 | |
| 3834 | fdh->elf.root.u.def.value = wptr - sec->contents; |
| 3835 | } |
| 3836 | else |
| 3837 | { |
| 3838 | /* Local syms are a bit tricky. We could |
| 3839 | tweak them as they can be cached, but |
| 3840 | we'd need to look through the local syms |
| 3841 | for the function descriptor sym which we |
| 3842 | don't have at the moment. So keep an |
| 3843 | array of adjustments. */ |
| 3844 | adjust[rel->r_offset / 24] = wptr - rptr; |
| 3845 | } |
| 3846 | |
| 3847 | if (wptr != rptr) |
| 3848 | memcpy (wptr, rptr, 24); |
| 3849 | wptr += 24; |
| 3850 | } |
| 3851 | rptr += 24; |
| 3852 | offset += 24; |
| 3853 | } |
| 3854 | |
| 3855 | /* We need to adjust any reloc offsets to point to the |
| 3856 | new opd entries. While we're at it, we may as well |
| 3857 | remove redundant relocs. */ |
| 3858 | if (!skip) |
| 3859 | { |
| 3860 | rel->r_offset += wptr - rptr; |
| 3861 | if (write_rel != rel) |
| 3862 | memcpy (write_rel, rel, sizeof (*rel)); |
| 3863 | ++write_rel; |
| 3864 | } |
| 3865 | } |
| 3866 | |
| 3867 | sec->_cooked_size = wptr - sec->contents; |
| 3868 | sec->reloc_count = write_rel - relstart; |
| 3869 | /* Fudge the size too, as this is used later in |
| 3870 | elf_bfd_final_link if we are emitting relocs. */ |
| 3871 | elf_section_data (sec)->rel_hdr.sh_size |
| 3872 | = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize; |
| 3873 | BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL); |
| 3874 | } |
| 3875 | else if (elf_section_data (sec)->relocs != relstart) |
| 3876 | free (relstart); |
| 3877 | |
| 3878 | if (local_syms != NULL |
| 3879 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 3880 | { |
| 3881 | if (!info->keep_memory) |
| 3882 | free (local_syms); |
| 3883 | else |
| 3884 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 3885 | } |
| 3886 | } |
| 3887 | |
| 3888 | return TRUE; |
| 3889 | } |
| 3890 | |
| 3891 | /* This is the condition under which ppc64_elf_finish_dynamic_symbol |
| 3892 | will be called from elflink.h. If elflink.h doesn't call our |
| 3893 | finish_dynamic_symbol routine, we'll need to do something about |
| 3894 | initializing any .plt and .got entries in ppc64_elf_relocate_section. */ |
| 3895 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ |
| 3896 | ((DYN) \ |
| 3897 | && ((INFO)->shared \ |
| 3898 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| 3899 | && ((H)->dynindx != -1 \ |
| 3900 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| 3901 | |
| 3902 | /* Allocate space in .plt, .got and associated reloc sections for |
| 3903 | dynamic relocs. */ |
| 3904 | |
| 3905 | static bfd_boolean |
| 3906 | allocate_dynrelocs (h, inf) |
| 3907 | struct elf_link_hash_entry *h; |
| 3908 | PTR inf; |
| 3909 | { |
| 3910 | struct bfd_link_info *info; |
| 3911 | struct ppc_link_hash_table *htab; |
| 3912 | asection *s; |
| 3913 | struct ppc_link_hash_entry *eh; |
| 3914 | struct ppc_dyn_relocs *p; |
| 3915 | |
| 3916 | if (h->root.type == bfd_link_hash_indirect) |
| 3917 | return TRUE; |
| 3918 | |
| 3919 | if (h->root.type == bfd_link_hash_warning) |
| 3920 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3921 | |
| 3922 | info = (struct bfd_link_info *) inf; |
| 3923 | htab = ppc_hash_table (info); |
| 3924 | |
| 3925 | if (htab->elf.dynamic_sections_created |
| 3926 | && h->plt.refcount > 0 |
| 3927 | && h->dynindx != -1) |
| 3928 | { |
| 3929 | BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); |
| 3930 | |
| 3931 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
| 3932 | { |
| 3933 | /* If this is the first .plt entry, make room for the special |
| 3934 | first entry. */ |
| 3935 | s = htab->splt; |
| 3936 | if (s->_raw_size == 0) |
| 3937 | s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| 3938 | |
| 3939 | h->plt.offset = s->_raw_size; |
| 3940 | |
| 3941 | /* Make room for this entry. */ |
| 3942 | s->_raw_size += PLT_ENTRY_SIZE; |
| 3943 | |
| 3944 | /* Make room for the .glink code. */ |
| 3945 | s = htab->sglink; |
| 3946 | if (s->_raw_size == 0) |
| 3947 | s->_raw_size += GLINK_CALL_STUB_SIZE; |
| 3948 | /* We need bigger stubs past index 32767. */ |
| 3949 | if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4) |
| 3950 | s->_raw_size += 4; |
| 3951 | s->_raw_size += 2*4; |
| 3952 | |
| 3953 | /* We also need to make an entry in the .rela.plt section. */ |
| 3954 | s = htab->srelplt; |
| 3955 | s->_raw_size += sizeof (Elf64_External_Rela); |
| 3956 | } |
| 3957 | else |
| 3958 | { |
| 3959 | h->plt.offset = (bfd_vma) -1; |
| 3960 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 3961 | } |
| 3962 | } |
| 3963 | else |
| 3964 | { |
| 3965 | h->plt.offset = (bfd_vma) -1; |
| 3966 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 3967 | } |
| 3968 | |
| 3969 | if (h->got.refcount > 0) |
| 3970 | { |
| 3971 | bfd_boolean dyn; |
| 3972 | |
| 3973 | /* Make sure this symbol is output as a dynamic symbol. |
| 3974 | Undefined weak syms won't yet be marked as dynamic. */ |
| 3975 | if (h->dynindx == -1 |
| 3976 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 3977 | { |
| 3978 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| 3979 | return FALSE; |
| 3980 | } |
| 3981 | |
| 3982 | s = htab->sgot; |
| 3983 | h->got.offset = s->_raw_size; |
| 3984 | s->_raw_size += 8; |
| 3985 | dyn = htab->elf.dynamic_sections_created; |
| 3986 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) |
| 3987 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| 3988 | } |
| 3989 | else |
| 3990 | h->got.offset = (bfd_vma) -1; |
| 3991 | |
| 3992 | eh = (struct ppc_link_hash_entry *) h; |
| 3993 | if (eh->dyn_relocs == NULL) |
| 3994 | return TRUE; |
| 3995 | |
| 3996 | /* In the shared -Bsymbolic case, discard space allocated for |
| 3997 | dynamic pc-relative relocs against symbols which turn out to be |
| 3998 | defined in regular objects. For the normal shared case, discard |
| 3999 | space for relocs that have become local due to symbol visibility |
| 4000 | changes. */ |
| 4001 | |
| 4002 | if (info->shared) |
| 4003 | { |
| 4004 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 4005 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| 4006 | || info->symbolic)) |
| 4007 | { |
| 4008 | struct ppc_dyn_relocs **pp; |
| 4009 | |
| 4010 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 4011 | { |
| 4012 | p->count -= p->pc_count; |
| 4013 | p->pc_count = 0; |
| 4014 | if (p->count == 0) |
| 4015 | *pp = p->next; |
| 4016 | else |
| 4017 | pp = &p->next; |
| 4018 | } |
| 4019 | } |
| 4020 | } |
| 4021 | else |
| 4022 | { |
| 4023 | /* For the non-shared case, discard space for relocs against |
| 4024 | symbols which turn out to need copy relocs or are not |
| 4025 | dynamic. */ |
| 4026 | |
| 4027 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 4028 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 4029 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 4030 | || (htab->elf.dynamic_sections_created |
| 4031 | && (h->root.type == bfd_link_hash_undefweak |
| 4032 | || h->root.type == bfd_link_hash_undefined)))) |
| 4033 | { |
| 4034 | /* Make sure this symbol is output as a dynamic symbol. |
| 4035 | Undefined weak syms won't yet be marked as dynamic. */ |
| 4036 | if (h->dynindx == -1 |
| 4037 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 4038 | { |
| 4039 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| 4040 | return FALSE; |
| 4041 | } |
| 4042 | |
| 4043 | /* If that succeeded, we know we'll be keeping all the |
| 4044 | relocs. */ |
| 4045 | if (h->dynindx != -1) |
| 4046 | goto keep; |
| 4047 | } |
| 4048 | |
| 4049 | eh->dyn_relocs = NULL; |
| 4050 | |
| 4051 | keep: ; |
| 4052 | } |
| 4053 | |
| 4054 | /* Finally, allocate space. */ |
| 4055 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 4056 | { |
| 4057 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 4058 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| 4059 | } |
| 4060 | |
| 4061 | return TRUE; |
| 4062 | } |
| 4063 | |
| 4064 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 4065 | |
| 4066 | static bfd_boolean |
| 4067 | readonly_dynrelocs (h, inf) |
| 4068 | struct elf_link_hash_entry *h; |
| 4069 | PTR inf; |
| 4070 | { |
| 4071 | struct ppc_link_hash_entry *eh; |
| 4072 | struct ppc_dyn_relocs *p; |
| 4073 | |
| 4074 | if (h->root.type == bfd_link_hash_warning) |
| 4075 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4076 | |
| 4077 | eh = (struct ppc_link_hash_entry *) h; |
| 4078 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 4079 | { |
| 4080 | asection *s = p->sec->output_section; |
| 4081 | |
| 4082 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 4083 | { |
| 4084 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 4085 | |
| 4086 | info->flags |= DF_TEXTREL; |
| 4087 | |
| 4088 | /* Not an error, just cut short the traversal. */ |
| 4089 | return FALSE; |
| 4090 | } |
| 4091 | } |
| 4092 | return TRUE; |
| 4093 | } |
| 4094 | |
| 4095 | /* Set the sizes of the dynamic sections. */ |
| 4096 | |
| 4097 | static bfd_boolean |
| 4098 | ppc64_elf_size_dynamic_sections (output_bfd, info) |
| 4099 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 4100 | struct bfd_link_info *info; |
| 4101 | { |
| 4102 | struct ppc_link_hash_table *htab; |
| 4103 | bfd *dynobj; |
| 4104 | asection *s; |
| 4105 | bfd_boolean relocs; |
| 4106 | bfd *ibfd; |
| 4107 | |
| 4108 | htab = ppc_hash_table (info); |
| 4109 | dynobj = htab->elf.dynobj; |
| 4110 | if (dynobj == NULL) |
| 4111 | abort (); |
| 4112 | |
| 4113 | if (htab->elf.dynamic_sections_created) |
| 4114 | { |
| 4115 | /* Set the contents of the .interp section to the interpreter. */ |
| 4116 | if (! info->shared) |
| 4117 | { |
| 4118 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 4119 | if (s == NULL) |
| 4120 | abort (); |
| 4121 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 4122 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 4123 | } |
| 4124 | } |
| 4125 | |
| 4126 | /* Set up .got offsets for local syms, and space for local dynamic |
| 4127 | relocs. */ |
| 4128 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 4129 | { |
| 4130 | bfd_signed_vma *local_got; |
| 4131 | bfd_signed_vma *end_local_got; |
| 4132 | bfd_size_type locsymcount; |
| 4133 | Elf_Internal_Shdr *symtab_hdr; |
| 4134 | asection *srel; |
| 4135 | |
| 4136 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 4137 | continue; |
| 4138 | |
| 4139 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 4140 | { |
| 4141 | struct ppc_dyn_relocs *p; |
| 4142 | |
| 4143 | for (p = *((struct ppc_dyn_relocs **) |
| 4144 | &elf_section_data (s)->local_dynrel); |
| 4145 | p != NULL; |
| 4146 | p = p->next) |
| 4147 | { |
| 4148 | if (!bfd_is_abs_section (p->sec) |
| 4149 | && bfd_is_abs_section (p->sec->output_section)) |
| 4150 | { |
| 4151 | /* Input section has been discarded, either because |
| 4152 | it is a copy of a linkonce section or due to |
| 4153 | linker script /DISCARD/, so we'll be discarding |
| 4154 | the relocs too. */ |
| 4155 | } |
| 4156 | else if (p->count != 0) |
| 4157 | { |
| 4158 | srel = elf_section_data (p->sec)->sreloc; |
| 4159 | srel->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| 4160 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 4161 | info->flags |= DF_TEXTREL; |
| 4162 | } |
| 4163 | } |
| 4164 | } |
| 4165 | |
| 4166 | local_got = elf_local_got_refcounts (ibfd); |
| 4167 | if (!local_got) |
| 4168 | continue; |
| 4169 | |
| 4170 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 4171 | locsymcount = symtab_hdr->sh_info; |
| 4172 | end_local_got = local_got + locsymcount; |
| 4173 | s = htab->sgot; |
| 4174 | srel = htab->srelgot; |
| 4175 | for (; local_got < end_local_got; ++local_got) |
| 4176 | { |
| 4177 | if (*local_got > 0) |
| 4178 | { |
| 4179 | *local_got = s->_raw_size; |
| 4180 | s->_raw_size += 8; |
| 4181 | if (info->shared) |
| 4182 | srel->_raw_size += sizeof (Elf64_External_Rela); |
| 4183 | } |
| 4184 | else |
| 4185 | *local_got = (bfd_vma) -1; |
| 4186 | } |
| 4187 | } |
| 4188 | |
| 4189 | /* Allocate global sym .plt and .got entries, and space for global |
| 4190 | sym dynamic relocs. */ |
| 4191 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
| 4192 | |
| 4193 | /* We now have determined the sizes of the various dynamic sections. |
| 4194 | Allocate memory for them. */ |
| 4195 | relocs = FALSE; |
| 4196 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 4197 | { |
| 4198 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 4199 | continue; |
| 4200 | |
| 4201 | if (s == htab->sbrlt || s == htab->srelbrlt) |
| 4202 | /* These haven't been allocated yet; don't strip. */ |
| 4203 | continue; |
| 4204 | else if (s == htab->splt |
| 4205 | || s == htab->sgot |
| 4206 | || s == htab->sglink) |
| 4207 | { |
| 4208 | /* Strip this section if we don't need it; see the |
| 4209 | comment below. */ |
| 4210 | } |
| 4211 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| 4212 | { |
| 4213 | if (s->_raw_size == 0) |
| 4214 | { |
| 4215 | /* If we don't need this section, strip it from the |
| 4216 | output file. This is mostly to handle .rela.bss and |
| 4217 | .rela.plt. We must create both sections in |
| 4218 | create_dynamic_sections, because they must be created |
| 4219 | before the linker maps input sections to output |
| 4220 | sections. The linker does that before |
| 4221 | adjust_dynamic_symbol is called, and it is that |
| 4222 | function which decides whether anything needs to go |
| 4223 | into these sections. */ |
| 4224 | } |
| 4225 | else |
| 4226 | { |
| 4227 | if (s != htab->srelplt) |
| 4228 | relocs = TRUE; |
| 4229 | |
| 4230 | /* We use the reloc_count field as a counter if we need |
| 4231 | to copy relocs into the output file. */ |
| 4232 | s->reloc_count = 0; |
| 4233 | } |
| 4234 | } |
| 4235 | else |
| 4236 | { |
| 4237 | /* It's not one of our sections, so don't allocate space. */ |
| 4238 | continue; |
| 4239 | } |
| 4240 | |
| 4241 | if (s->_raw_size == 0) |
| 4242 | { |
| 4243 | _bfd_strip_section_from_output (info, s); |
| 4244 | continue; |
| 4245 | } |
| 4246 | |
| 4247 | /* .plt is in the bss section. We don't initialise it. */ |
| 4248 | if ((s->flags & SEC_LOAD) == 0) |
| 4249 | continue; |
| 4250 | |
| 4251 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 4252 | here in case unused entries are not reclaimed before the |
| 4253 | section's contents are written out. This should not happen, |
| 4254 | but this way if it does, we get a R_PPC64_NONE reloc instead |
| 4255 | of garbage. */ |
| 4256 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 4257 | if (s->contents == NULL) |
| 4258 | return FALSE; |
| 4259 | } |
| 4260 | |
| 4261 | if (htab->elf.dynamic_sections_created) |
| 4262 | { |
| 4263 | /* Add some entries to the .dynamic section. We fill in the |
| 4264 | values later, in ppc64_elf_finish_dynamic_sections, but we |
| 4265 | must add the entries now so that we get the correct size for |
| 4266 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 4267 | dynamic linker and used by the debugger. */ |
| 4268 | #define add_dynamic_entry(TAG, VAL) \ |
| 4269 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 4270 | |
| 4271 | if (!info->shared) |
| 4272 | { |
| 4273 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 4274 | return FALSE; |
| 4275 | } |
| 4276 | |
| 4277 | if (htab->splt != NULL && htab->splt->_raw_size != 0) |
| 4278 | { |
| 4279 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 4280 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 4281 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 4282 | || !add_dynamic_entry (DT_JMPREL, 0) |
| 4283 | || !add_dynamic_entry (DT_PPC64_GLINK, 0)) |
| 4284 | return FALSE; |
| 4285 | } |
| 4286 | |
| 4287 | if (NO_OPD_RELOCS) |
| 4288 | { |
| 4289 | if (!add_dynamic_entry (DT_PPC64_OPD, 0) |
| 4290 | || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) |
| 4291 | return FALSE; |
| 4292 | } |
| 4293 | |
| 4294 | if (relocs) |
| 4295 | { |
| 4296 | if (!add_dynamic_entry (DT_RELA, 0) |
| 4297 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 4298 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| 4299 | return FALSE; |
| 4300 | |
| 4301 | /* If any dynamic relocs apply to a read-only section, |
| 4302 | then we need a DT_TEXTREL entry. */ |
| 4303 | if ((info->flags & DF_TEXTREL) == 0) |
| 4304 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, |
| 4305 | (PTR) info); |
| 4306 | |
| 4307 | if ((info->flags & DF_TEXTREL) != 0) |
| 4308 | { |
| 4309 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 4310 | return FALSE; |
| 4311 | } |
| 4312 | } |
| 4313 | } |
| 4314 | #undef add_dynamic_entry |
| 4315 | |
| 4316 | return TRUE; |
| 4317 | } |
| 4318 | |
| 4319 | /* Determine the type of stub needed, if any, for a call. */ |
| 4320 | |
| 4321 | static INLINE enum ppc_stub_type |
| 4322 | ppc_type_of_stub (input_sec, rel, hash, destination) |
| 4323 | asection *input_sec; |
| 4324 | const Elf_Internal_Rela *rel; |
| 4325 | struct ppc_link_hash_entry **hash; |
| 4326 | bfd_vma destination; |
| 4327 | { |
| 4328 | struct ppc_link_hash_entry *h = *hash; |
| 4329 | bfd_vma location; |
| 4330 | bfd_vma branch_offset; |
| 4331 | bfd_vma max_branch_offset; |
| 4332 | unsigned int r_type; |
| 4333 | |
| 4334 | if (h != NULL) |
| 4335 | { |
| 4336 | if (h->oh != NULL |
| 4337 | && h->oh->plt.offset != (bfd_vma) -1 |
| 4338 | && h->oh->dynindx != -1) |
| 4339 | { |
| 4340 | *hash = (struct ppc_link_hash_entry *) h->oh; |
| 4341 | return ppc_stub_plt_call; |
| 4342 | } |
| 4343 | |
| 4344 | if (h->elf.root.type == bfd_link_hash_undefweak |
| 4345 | || h->elf.root.type == bfd_link_hash_undefined) |
| 4346 | return ppc_stub_none; |
| 4347 | } |
| 4348 | |
| 4349 | /* Determine where the call point is. */ |
| 4350 | location = (input_sec->output_offset |
| 4351 | + input_sec->output_section->vma |
| 4352 | + rel->r_offset); |
| 4353 | |
| 4354 | branch_offset = destination - location; |
| 4355 | r_type = ELF64_R_TYPE (rel->r_info); |
| 4356 | |
| 4357 | /* Determine if a long branch stub is needed. */ |
| 4358 | max_branch_offset = 1 << 25; |
| 4359 | if (r_type != (unsigned int) R_PPC64_REL24) |
| 4360 | max_branch_offset = 1 << 15; |
| 4361 | |
| 4362 | if (branch_offset + max_branch_offset >= 2 * max_branch_offset) |
| 4363 | /* We need a stub. Figure out whether a long_branch or plt_branch |
| 4364 | is needed later. */ |
| 4365 | return ppc_stub_long_branch; |
| 4366 | |
| 4367 | return ppc_stub_none; |
| 4368 | } |
| 4369 | |
| 4370 | /* Build a .plt call stub. */ |
| 4371 | |
| 4372 | static bfd_byte * |
| 4373 | build_plt_stub (obfd, p, offset, glink) |
| 4374 | bfd *obfd; |
| 4375 | bfd_byte *p; |
| 4376 | int offset; |
| 4377 | int glink; |
| 4378 | { |
| 4379 | #define PPC_LO(v) ((v) & 0xffff) |
| 4380 | #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| 4381 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| 4382 | |
| 4383 | if (glink) |
| 4384 | bfd_put_32 (obfd, LD_R2_40R1, p), p += 4; |
| 4385 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; |
| 4386 | if (!glink) |
| 4387 | bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; |
| 4388 | bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; |
| 4389 | if (PPC_HA (offset + 8) != PPC_HA (offset)) |
| 4390 | bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4; |
| 4391 | offset += 8; |
| 4392 | bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4; |
| 4393 | if (PPC_HA (offset + 8) != PPC_HA (offset)) |
| 4394 | bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4; |
| 4395 | offset += 8; |
| 4396 | bfd_put_32 (obfd, MTCTR_R11, p), p += 4; |
| 4397 | bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; |
| 4398 | bfd_put_32 (obfd, BCTR, p), p += 4; |
| 4399 | return p; |
| 4400 | } |
| 4401 | |
| 4402 | static bfd_boolean |
| 4403 | ppc_build_one_stub (gen_entry, in_arg) |
| 4404 | struct bfd_hash_entry *gen_entry; |
| 4405 | PTR in_arg; |
| 4406 | { |
| 4407 | struct ppc_stub_hash_entry *stub_entry; |
| 4408 | struct ppc_branch_hash_entry *br_entry; |
| 4409 | struct bfd_link_info *info; |
| 4410 | struct ppc_link_hash_table *htab; |
| 4411 | asection *stub_sec; |
| 4412 | bfd *stub_bfd; |
| 4413 | bfd_byte *loc; |
| 4414 | bfd_byte *p; |
| 4415 | unsigned int indx; |
| 4416 | bfd_vma off; |
| 4417 | int size; |
| 4418 | |
| 4419 | /* Massage our args to the form they really have. */ |
| 4420 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| 4421 | info = (struct bfd_link_info *) in_arg; |
| 4422 | |
| 4423 | htab = ppc_hash_table (info); |
| 4424 | stub_sec = stub_entry->stub_sec; |
| 4425 | |
| 4426 | /* Make a note of the offset within the stubs for this entry. */ |
| 4427 | stub_entry->stub_offset = stub_sec->_cooked_size; |
| 4428 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 4429 | |
| 4430 | stub_bfd = stub_sec->owner; |
| 4431 | |
| 4432 | switch (stub_entry->stub_type) |
| 4433 | { |
| 4434 | case ppc_stub_long_branch: |
| 4435 | /* Branches are relative. This is where we are going to. */ |
| 4436 | off = (stub_entry->target_value |
| 4437 | + stub_entry->target_section->output_offset |
| 4438 | + stub_entry->target_section->output_section->vma); |
| 4439 | |
| 4440 | /* And this is where we are coming from. */ |
| 4441 | off -= (stub_entry->stub_offset |
| 4442 | + stub_sec->output_offset |
| 4443 | + stub_sec->output_section->vma); |
| 4444 | |
| 4445 | BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); |
| 4446 | |
| 4447 | bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc); |
| 4448 | size = 4; |
| 4449 | break; |
| 4450 | |
| 4451 | case ppc_stub_plt_branch: |
| 4452 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| 4453 | stub_entry->root.string + 9, |
| 4454 | FALSE, FALSE); |
| 4455 | if (br_entry == NULL) |
| 4456 | { |
| 4457 | (*_bfd_error_handler) (_("can't find branch stub `%s'"), |
| 4458 | stub_entry->root.string + 9); |
| 4459 | htab->stub_error = TRUE; |
| 4460 | return FALSE; |
| 4461 | } |
| 4462 | |
| 4463 | off = (stub_entry->target_value |
| 4464 | + stub_entry->target_section->output_offset |
| 4465 | + stub_entry->target_section->output_section->vma); |
| 4466 | |
| 4467 | bfd_put_64 (htab->sbrlt->owner, off, |
| 4468 | htab->sbrlt->contents + br_entry->offset); |
| 4469 | |
| 4470 | if (info->shared) |
| 4471 | { |
| 4472 | /* Create a reloc for the branch lookup table entry. */ |
| 4473 | Elf_Internal_Rela rela; |
| 4474 | bfd_byte *loc; |
| 4475 | |
| 4476 | rela.r_offset = (br_entry->offset |
| 4477 | + htab->sbrlt->output_offset |
| 4478 | + htab->sbrlt->output_section->vma); |
| 4479 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 4480 | rela.r_addend = off; |
| 4481 | |
| 4482 | loc = htab->srelbrlt->contents; |
| 4483 | loc += htab->srelbrlt->reloc_count++ * sizeof (Elf64_External_Rela); |
| 4484 | bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, loc); |
| 4485 | } |
| 4486 | |
| 4487 | off = (br_entry->offset |
| 4488 | + htab->sbrlt->output_offset |
| 4489 | + htab->sbrlt->output_section->vma |
| 4490 | - elf_gp (htab->sbrlt->output_section->owner) |
| 4491 | - TOC_BASE_OFF); |
| 4492 | |
| 4493 | if (off + 0x80000000 > 0xffffffff || (off & 7) != 0) |
| 4494 | { |
| 4495 | (*_bfd_error_handler) |
| 4496 | (_("linkage table error against `%s'"), |
| 4497 | stub_entry->root.string); |
| 4498 | bfd_set_error (bfd_error_bad_value); |
| 4499 | htab->stub_error = TRUE; |
| 4500 | return FALSE; |
| 4501 | } |
| 4502 | |
| 4503 | indx = off; |
| 4504 | bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc); |
| 4505 | bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4); |
| 4506 | bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8); |
| 4507 | bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12); |
| 4508 | size = 16; |
| 4509 | break; |
| 4510 | |
| 4511 | case ppc_stub_plt_call: |
| 4512 | /* Do the best we can for shared libraries built without |
| 4513 | exporting ".foo" for each "foo". This can happen when symbol |
| 4514 | versioning scripts strip all bar a subset of symbols. */ |
| 4515 | if (stub_entry->h->oh->root.type != bfd_link_hash_defined |
| 4516 | && stub_entry->h->oh->root.type != bfd_link_hash_defweak) |
| 4517 | { |
| 4518 | /* Point the symbol at the stub. There may be multiple stubs, |
| 4519 | we don't really care; The main thing is to make this sym |
| 4520 | defined somewhere. */ |
| 4521 | stub_entry->h->oh->root.type = bfd_link_hash_defined; |
| 4522 | stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec; |
| 4523 | stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset; |
| 4524 | } |
| 4525 | |
| 4526 | /* Now build the stub. */ |
| 4527 | off = stub_entry->h->elf.plt.offset; |
| 4528 | if (off >= (bfd_vma) -2) |
| 4529 | abort (); |
| 4530 | |
| 4531 | off &= ~ (bfd_vma) 1; |
| 4532 | off += (htab->splt->output_offset |
| 4533 | + htab->splt->output_section->vma |
| 4534 | - elf_gp (htab->splt->output_section->owner) |
| 4535 | - TOC_BASE_OFF); |
| 4536 | |
| 4537 | if (off + 0x80000000 > 0xffffffff || (off & 7) != 0) |
| 4538 | { |
| 4539 | (*_bfd_error_handler) |
| 4540 | (_("linkage table error against `%s'"), |
| 4541 | stub_entry->h->elf.root.root.string); |
| 4542 | bfd_set_error (bfd_error_bad_value); |
| 4543 | htab->stub_error = TRUE; |
| 4544 | return FALSE; |
| 4545 | } |
| 4546 | |
| 4547 | p = build_plt_stub (stub_bfd, loc, (int) off, 0); |
| 4548 | size = p - loc; |
| 4549 | break; |
| 4550 | |
| 4551 | default: |
| 4552 | BFD_FAIL (); |
| 4553 | return FALSE; |
| 4554 | } |
| 4555 | |
| 4556 | stub_sec->_cooked_size += size; |
| 4557 | return TRUE; |
| 4558 | } |
| 4559 | |
| 4560 | /* As above, but don't actually build the stub. Just bump offset so |
| 4561 | we know stub section sizes, and select plt_branch stubs where |
| 4562 | long_branch stubs won't do. */ |
| 4563 | |
| 4564 | static bfd_boolean |
| 4565 | ppc_size_one_stub (gen_entry, in_arg) |
| 4566 | struct bfd_hash_entry *gen_entry; |
| 4567 | PTR in_arg; |
| 4568 | { |
| 4569 | struct ppc_stub_hash_entry *stub_entry; |
| 4570 | struct ppc_link_hash_table *htab; |
| 4571 | bfd_vma off; |
| 4572 | int size; |
| 4573 | |
| 4574 | /* Massage our args to the form they really have. */ |
| 4575 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| 4576 | htab = (struct ppc_link_hash_table *) in_arg; |
| 4577 | |
| 4578 | if (stub_entry->stub_type == ppc_stub_plt_call) |
| 4579 | { |
| 4580 | off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1; |
| 4581 | off += (htab->splt->output_offset |
| 4582 | + htab->splt->output_section->vma |
| 4583 | - elf_gp (htab->splt->output_section->owner) |
| 4584 | - TOC_BASE_OFF); |
| 4585 | |
| 4586 | size = 28; |
| 4587 | if (PPC_HA ((int) off + 16) != PPC_HA ((int) off)) |
| 4588 | size += 4; |
| 4589 | } |
| 4590 | else |
| 4591 | { |
| 4592 | /* ppc_stub_long_branch or ppc_stub_plt_branch. */ |
| 4593 | stub_entry->stub_type = ppc_stub_long_branch; |
| 4594 | size = 4; |
| 4595 | |
| 4596 | off = (stub_entry->target_value |
| 4597 | + stub_entry->target_section->output_offset |
| 4598 | + stub_entry->target_section->output_section->vma); |
| 4599 | off -= (stub_entry->stub_sec->_raw_size |
| 4600 | + stub_entry->stub_sec->output_offset |
| 4601 | + stub_entry->stub_sec->output_section->vma); |
| 4602 | |
| 4603 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| 4604 | { |
| 4605 | struct ppc_branch_hash_entry *br_entry; |
| 4606 | |
| 4607 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| 4608 | stub_entry->root.string + 9, |
| 4609 | TRUE, FALSE); |
| 4610 | if (br_entry == NULL) |
| 4611 | { |
| 4612 | (*_bfd_error_handler) (_("can't build branch stub `%s'"), |
| 4613 | stub_entry->root.string + 9); |
| 4614 | htab->stub_error = TRUE; |
| 4615 | return FALSE; |
| 4616 | } |
| 4617 | |
| 4618 | if (br_entry->iter != htab->stub_iteration) |
| 4619 | { |
| 4620 | br_entry->iter = htab->stub_iteration; |
| 4621 | br_entry->offset = htab->sbrlt->_raw_size; |
| 4622 | htab->sbrlt->_raw_size += 8; |
| 4623 | } |
| 4624 | stub_entry->stub_type = ppc_stub_plt_branch; |
| 4625 | size = 16; |
| 4626 | } |
| 4627 | } |
| 4628 | |
| 4629 | stub_entry->stub_sec->_raw_size += size; |
| 4630 | return TRUE; |
| 4631 | } |
| 4632 | |
| 4633 | /* Set up various things so that we can make a list of input sections |
| 4634 | for each output section included in the link. Returns -1 on error, |
| 4635 | 0 when no stubs will be needed, and 1 on success. */ |
| 4636 | |
| 4637 | int |
| 4638 | ppc64_elf_setup_section_lists (output_bfd, info) |
| 4639 | bfd *output_bfd; |
| 4640 | struct bfd_link_info *info; |
| 4641 | { |
| 4642 | bfd *input_bfd; |
| 4643 | int top_id, top_index; |
| 4644 | asection *section; |
| 4645 | asection **input_list, **list; |
| 4646 | bfd_size_type amt; |
| 4647 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 4648 | |
| 4649 | if (htab->elf.root.creator->flavour != bfd_target_elf_flavour |
| 4650 | || htab->sbrlt == NULL) |
| 4651 | return 0; |
| 4652 | |
| 4653 | /* Find the top input section id. */ |
| 4654 | for (input_bfd = info->input_bfds, top_id = 0; |
| 4655 | input_bfd != NULL; |
| 4656 | input_bfd = input_bfd->link_next) |
| 4657 | { |
| 4658 | for (section = input_bfd->sections; |
| 4659 | section != NULL; |
| 4660 | section = section->next) |
| 4661 | { |
| 4662 | if (top_id < section->id) |
| 4663 | top_id = section->id; |
| 4664 | } |
| 4665 | } |
| 4666 | |
| 4667 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 4668 | htab->stub_group = (struct map_stub *) bfd_zmalloc (amt); |
| 4669 | if (htab->stub_group == NULL) |
| 4670 | return -1; |
| 4671 | |
| 4672 | /* We can't use output_bfd->section_count here to find the top output |
| 4673 | section index as some sections may have been removed, and |
| 4674 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 4675 | for (section = output_bfd->sections, top_index = 0; |
| 4676 | section != NULL; |
| 4677 | section = section->next) |
| 4678 | { |
| 4679 | if (top_index < section->index) |
| 4680 | top_index = section->index; |
| 4681 | } |
| 4682 | |
| 4683 | htab->top_index = top_index; |
| 4684 | amt = sizeof (asection *) * (top_index + 1); |
| 4685 | input_list = (asection **) bfd_malloc (amt); |
| 4686 | htab->input_list = input_list; |
| 4687 | if (input_list == NULL) |
| 4688 | return -1; |
| 4689 | |
| 4690 | /* For sections we aren't interested in, mark their entries with a |
| 4691 | value we can check later. */ |
| 4692 | list = input_list + top_index; |
| 4693 | do |
| 4694 | *list = bfd_abs_section_ptr; |
| 4695 | while (list-- != input_list); |
| 4696 | |
| 4697 | for (section = output_bfd->sections; |
| 4698 | section != NULL; |
| 4699 | section = section->next) |
| 4700 | { |
| 4701 | if ((section->flags & SEC_CODE) != 0) |
| 4702 | input_list[section->index] = NULL; |
| 4703 | } |
| 4704 | |
| 4705 | return 1; |
| 4706 | } |
| 4707 | |
| 4708 | /* The linker repeatedly calls this function for each input section, |
| 4709 | in the order that input sections are linked into output sections. |
| 4710 | Build lists of input sections to determine groupings between which |
| 4711 | we may insert linker stubs. */ |
| 4712 | |
| 4713 | void |
| 4714 | ppc64_elf_next_input_section (info, isec) |
| 4715 | struct bfd_link_info *info; |
| 4716 | asection *isec; |
| 4717 | { |
| 4718 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 4719 | |
| 4720 | if (isec->output_section->index <= htab->top_index) |
| 4721 | { |
| 4722 | asection **list = htab->input_list + isec->output_section->index; |
| 4723 | if (*list != bfd_abs_section_ptr) |
| 4724 | { |
| 4725 | /* Steal the link_sec pointer for our list. */ |
| 4726 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 4727 | /* This happens to make the list in reverse order, |
| 4728 | which is what we want. */ |
| 4729 | PREV_SEC (isec) = *list; |
| 4730 | *list = isec; |
| 4731 | } |
| 4732 | } |
| 4733 | } |
| 4734 | |
| 4735 | /* See whether we can group stub sections together. Grouping stub |
| 4736 | sections may result in fewer stubs. More importantly, we need to |
| 4737 | put all .init* and .fini* stubs at the beginning of the .init or |
| 4738 | .fini output sections respectively, because glibc splits the |
| 4739 | _init and _fini functions into multiple parts. Putting a stub in |
| 4740 | the middle of a function is not a good idea. */ |
| 4741 | |
| 4742 | static void |
| 4743 | group_sections (htab, stub_group_size, stubs_always_before_branch) |
| 4744 | struct ppc_link_hash_table *htab; |
| 4745 | bfd_size_type stub_group_size; |
| 4746 | bfd_boolean stubs_always_before_branch; |
| 4747 | { |
| 4748 | asection **list = htab->input_list + htab->top_index; |
| 4749 | do |
| 4750 | { |
| 4751 | asection *tail = *list; |
| 4752 | if (tail == bfd_abs_section_ptr) |
| 4753 | continue; |
| 4754 | while (tail != NULL) |
| 4755 | { |
| 4756 | asection *curr; |
| 4757 | asection *prev; |
| 4758 | bfd_size_type total; |
| 4759 | |
| 4760 | curr = tail; |
| 4761 | if (tail->_cooked_size) |
| 4762 | total = tail->_cooked_size; |
| 4763 | else |
| 4764 | total = tail->_raw_size; |
| 4765 | while ((prev = PREV_SEC (curr)) != NULL |
| 4766 | && ((total += curr->output_offset - prev->output_offset) |
| 4767 | < stub_group_size)) |
| 4768 | curr = prev; |
| 4769 | |
| 4770 | /* OK, the size from the start of CURR to the end is less |
| 4771 | than stub_group_size and thus can be handled by one stub |
| 4772 | section. (or the tail section is itself larger than |
| 4773 | stub_group_size, in which case we may be toast.) We |
| 4774 | should really be keeping track of the total size of stubs |
| 4775 | added here, as stubs contribute to the final output |
| 4776 | section size. That's a little tricky, and this way will |
| 4777 | only break if stubs added make the total size more than |
| 4778 | 2^25, ie. for the default stub_group_size, if stubs total |
| 4779 | more than 2834432 bytes, or over 100000 plt call stubs. */ |
| 4780 | do |
| 4781 | { |
| 4782 | prev = PREV_SEC (tail); |
| 4783 | /* Set up this stub group. */ |
| 4784 | htab->stub_group[tail->id].link_sec = curr; |
| 4785 | } |
| 4786 | while (tail != curr && (tail = prev) != NULL); |
| 4787 | |
| 4788 | /* But wait, there's more! Input sections up to stub_group_size |
| 4789 | bytes before the stub section can be handled by it too. */ |
| 4790 | if (!stubs_always_before_branch) |
| 4791 | { |
| 4792 | total = 0; |
| 4793 | while (prev != NULL |
| 4794 | && ((total += tail->output_offset - prev->output_offset) |
| 4795 | < stub_group_size)) |
| 4796 | { |
| 4797 | tail = prev; |
| 4798 | prev = PREV_SEC (tail); |
| 4799 | htab->stub_group[tail->id].link_sec = curr; |
| 4800 | } |
| 4801 | } |
| 4802 | tail = prev; |
| 4803 | } |
| 4804 | } |
| 4805 | while (list-- != htab->input_list); |
| 4806 | free (htab->input_list); |
| 4807 | #undef PREV_SEC |
| 4808 | } |
| 4809 | |
| 4810 | /* Determine and set the size of the stub section for a final link. |
| 4811 | |
| 4812 | The basic idea here is to examine all the relocations looking for |
| 4813 | PC-relative calls to a target that is unreachable with a "bl" |
| 4814 | instruction. */ |
| 4815 | |
| 4816 | bfd_boolean |
| 4817 | ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size, |
| 4818 | add_stub_section, layout_sections_again) |
| 4819 | bfd *output_bfd; |
| 4820 | bfd *stub_bfd; |
| 4821 | struct bfd_link_info *info; |
| 4822 | bfd_signed_vma group_size; |
| 4823 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| 4824 | void (*layout_sections_again) PARAMS ((void)); |
| 4825 | { |
| 4826 | bfd_size_type stub_group_size; |
| 4827 | bfd_boolean stubs_always_before_branch; |
| 4828 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 4829 | |
| 4830 | /* Stash our params away. */ |
| 4831 | htab->stub_bfd = stub_bfd; |
| 4832 | htab->add_stub_section = add_stub_section; |
| 4833 | htab->layout_sections_again = layout_sections_again; |
| 4834 | stubs_always_before_branch = group_size < 0; |
| 4835 | if (group_size < 0) |
| 4836 | stub_group_size = -group_size; |
| 4837 | else |
| 4838 | stub_group_size = group_size; |
| 4839 | if (stub_group_size == 1) |
| 4840 | { |
| 4841 | /* Default values. */ |
| 4842 | stub_group_size = 30720000; |
| 4843 | if (htab->has_14bit_branch) |
| 4844 | stub_group_size = 30000; |
| 4845 | } |
| 4846 | |
| 4847 | group_sections (htab, stub_group_size, stubs_always_before_branch); |
| 4848 | |
| 4849 | while (1) |
| 4850 | { |
| 4851 | bfd *input_bfd; |
| 4852 | unsigned int bfd_indx; |
| 4853 | asection *stub_sec; |
| 4854 | bfd_boolean stub_changed; |
| 4855 | |
| 4856 | htab->stub_iteration += 1; |
| 4857 | stub_changed = FALSE; |
| 4858 | |
| 4859 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 4860 | input_bfd != NULL; |
| 4861 | input_bfd = input_bfd->link_next, bfd_indx++) |
| 4862 | { |
| 4863 | Elf_Internal_Shdr *symtab_hdr; |
| 4864 | asection *section; |
| 4865 | Elf_Internal_Sym *local_syms = NULL; |
| 4866 | |
| 4867 | /* We'll need the symbol table in a second. */ |
| 4868 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4869 | if (symtab_hdr->sh_info == 0) |
| 4870 | continue; |
| 4871 | |
| 4872 | /* Walk over each section attached to the input bfd. */ |
| 4873 | for (section = input_bfd->sections; |
| 4874 | section != NULL; |
| 4875 | section = section->next) |
| 4876 | { |
| 4877 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 4878 | |
| 4879 | /* If there aren't any relocs, then there's nothing more |
| 4880 | to do. */ |
| 4881 | if ((section->flags & SEC_RELOC) == 0 |
| 4882 | || section->reloc_count == 0) |
| 4883 | continue; |
| 4884 | |
| 4885 | /* If this section is a link-once section that will be |
| 4886 | discarded, then don't create any stubs. */ |
| 4887 | if (section->output_section == NULL |
| 4888 | || section->output_section->owner != output_bfd) |
| 4889 | continue; |
| 4890 | |
| 4891 | /* Get the relocs. */ |
| 4892 | internal_relocs |
| 4893 | = _bfd_elf64_link_read_relocs (input_bfd, section, NULL, |
| 4894 | (Elf_Internal_Rela *) NULL, |
| 4895 | info->keep_memory); |
| 4896 | if (internal_relocs == NULL) |
| 4897 | goto error_ret_free_local; |
| 4898 | |
| 4899 | /* Now examine each relocation. */ |
| 4900 | irela = internal_relocs; |
| 4901 | irelaend = irela + section->reloc_count; |
| 4902 | for (; irela < irelaend; irela++) |
| 4903 | { |
| 4904 | unsigned int r_type, r_indx; |
| 4905 | enum ppc_stub_type stub_type; |
| 4906 | struct ppc_stub_hash_entry *stub_entry; |
| 4907 | asection *sym_sec; |
| 4908 | bfd_vma sym_value; |
| 4909 | bfd_vma destination; |
| 4910 | struct ppc_link_hash_entry *hash; |
| 4911 | char *stub_name; |
| 4912 | const asection *id_sec; |
| 4913 | |
| 4914 | r_type = ELF64_R_TYPE (irela->r_info); |
| 4915 | r_indx = ELF64_R_SYM (irela->r_info); |
| 4916 | |
| 4917 | if (r_type >= (unsigned int) R_PPC_max) |
| 4918 | { |
| 4919 | bfd_set_error (bfd_error_bad_value); |
| 4920 | goto error_ret_free_internal; |
| 4921 | } |
| 4922 | |
| 4923 | /* Only look for stubs on branch instructions. */ |
| 4924 | if (r_type != (unsigned int) R_PPC64_REL24 |
| 4925 | && r_type != (unsigned int) R_PPC64_REL14 |
| 4926 | && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN |
| 4927 | && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN) |
| 4928 | continue; |
| 4929 | |
| 4930 | /* Now determine the call target, its name, value, |
| 4931 | section. */ |
| 4932 | sym_sec = NULL; |
| 4933 | sym_value = 0; |
| 4934 | destination = 0; |
| 4935 | hash = NULL; |
| 4936 | if (r_indx < symtab_hdr->sh_info) |
| 4937 | { |
| 4938 | /* It's a local symbol. */ |
| 4939 | Elf_Internal_Sym *sym; |
| 4940 | Elf_Internal_Shdr *hdr; |
| 4941 | |
| 4942 | if (local_syms == NULL) |
| 4943 | { |
| 4944 | local_syms |
| 4945 | = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 4946 | if (local_syms == NULL) |
| 4947 | local_syms |
| 4948 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 4949 | symtab_hdr->sh_info, 0, |
| 4950 | NULL, NULL, NULL); |
| 4951 | if (local_syms == NULL) |
| 4952 | goto error_ret_free_internal; |
| 4953 | } |
| 4954 | sym = local_syms + r_indx; |
| 4955 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| 4956 | sym_sec = hdr->bfd_section; |
| 4957 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 4958 | sym_value = sym->st_value; |
| 4959 | destination = (sym_value + irela->r_addend |
| 4960 | + sym_sec->output_offset |
| 4961 | + sym_sec->output_section->vma); |
| 4962 | } |
| 4963 | else |
| 4964 | { |
| 4965 | /* It's an external symbol. */ |
| 4966 | int e_indx; |
| 4967 | |
| 4968 | e_indx = r_indx - symtab_hdr->sh_info; |
| 4969 | hash = ((struct ppc_link_hash_entry *) |
| 4970 | elf_sym_hashes (input_bfd)[e_indx]); |
| 4971 | |
| 4972 | while (hash->elf.root.type == bfd_link_hash_indirect |
| 4973 | || hash->elf.root.type == bfd_link_hash_warning) |
| 4974 | hash = ((struct ppc_link_hash_entry *) |
| 4975 | hash->elf.root.u.i.link); |
| 4976 | |
| 4977 | if (hash->elf.root.type == bfd_link_hash_defined |
| 4978 | || hash->elf.root.type == bfd_link_hash_defweak) |
| 4979 | { |
| 4980 | sym_sec = hash->elf.root.u.def.section; |
| 4981 | sym_value = hash->elf.root.u.def.value; |
| 4982 | if (sym_sec->output_section != NULL) |
| 4983 | destination = (sym_value + irela->r_addend |
| 4984 | + sym_sec->output_offset |
| 4985 | + sym_sec->output_section->vma); |
| 4986 | } |
| 4987 | else if (hash->elf.root.type == bfd_link_hash_undefweak) |
| 4988 | ; |
| 4989 | else if (hash->elf.root.type == bfd_link_hash_undefined) |
| 4990 | ; |
| 4991 | else |
| 4992 | { |
| 4993 | bfd_set_error (bfd_error_bad_value); |
| 4994 | goto error_ret_free_internal; |
| 4995 | } |
| 4996 | } |
| 4997 | |
| 4998 | /* Determine what (if any) linker stub is needed. */ |
| 4999 | stub_type = ppc_type_of_stub (section, irela, &hash, |
| 5000 | destination); |
| 5001 | if (stub_type == ppc_stub_none) |
| 5002 | continue; |
| 5003 | |
| 5004 | /* Support for grouping stub sections. */ |
| 5005 | id_sec = htab->stub_group[section->id].link_sec; |
| 5006 | |
| 5007 | /* Get the name of this stub. */ |
| 5008 | stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); |
| 5009 | if (!stub_name) |
| 5010 | goto error_ret_free_internal; |
| 5011 | |
| 5012 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| 5013 | stub_name, FALSE, FALSE); |
| 5014 | if (stub_entry != NULL) |
| 5015 | { |
| 5016 | /* The proper stub has already been created. */ |
| 5017 | free (stub_name); |
| 5018 | continue; |
| 5019 | } |
| 5020 | |
| 5021 | stub_entry = ppc_add_stub (stub_name, section, htab); |
| 5022 | if (stub_entry == NULL) |
| 5023 | { |
| 5024 | free (stub_name); |
| 5025 | error_ret_free_internal: |
| 5026 | if (elf_section_data (section)->relocs == NULL) |
| 5027 | free (internal_relocs); |
| 5028 | error_ret_free_local: |
| 5029 | if (local_syms != NULL |
| 5030 | && (symtab_hdr->contents |
| 5031 | != (unsigned char *) local_syms)) |
| 5032 | free (local_syms); |
| 5033 | return FALSE; |
| 5034 | } |
| 5035 | |
| 5036 | stub_entry->target_value = sym_value; |
| 5037 | stub_entry->target_section = sym_sec; |
| 5038 | stub_entry->stub_type = stub_type; |
| 5039 | stub_entry->h = hash; |
| 5040 | stub_changed = TRUE; |
| 5041 | } |
| 5042 | |
| 5043 | /* We're done with the internal relocs, free them. */ |
| 5044 | if (elf_section_data (section)->relocs != internal_relocs) |
| 5045 | free (internal_relocs); |
| 5046 | } |
| 5047 | |
| 5048 | if (local_syms != NULL |
| 5049 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 5050 | { |
| 5051 | if (!info->keep_memory) |
| 5052 | free (local_syms); |
| 5053 | else |
| 5054 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 5055 | } |
| 5056 | } |
| 5057 | |
| 5058 | if (!stub_changed) |
| 5059 | break; |
| 5060 | |
| 5061 | /* OK, we've added some stubs. Find out the new size of the |
| 5062 | stub sections. */ |
| 5063 | for (stub_sec = htab->stub_bfd->sections; |
| 5064 | stub_sec != NULL; |
| 5065 | stub_sec = stub_sec->next) |
| 5066 | { |
| 5067 | stub_sec->_raw_size = 0; |
| 5068 | stub_sec->_cooked_size = 0; |
| 5069 | } |
| 5070 | htab->sbrlt->_raw_size = 0; |
| 5071 | htab->sbrlt->_cooked_size = 0; |
| 5072 | |
| 5073 | bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab); |
| 5074 | |
| 5075 | /* Ask the linker to do its stuff. */ |
| 5076 | (*htab->layout_sections_again) (); |
| 5077 | } |
| 5078 | |
| 5079 | /* It would be nice to strip .branch_lt from the output if the |
| 5080 | section is empty, but it's too late. If we strip sections here, |
| 5081 | the dynamic symbol table is corrupted since the section symbol |
| 5082 | for the stripped section isn't written. */ |
| 5083 | |
| 5084 | return TRUE; |
| 5085 | } |
| 5086 | |
| 5087 | /* Called after we have determined section placement. If sections |
| 5088 | move, we'll be called again. Provide a value for TOCstart. */ |
| 5089 | |
| 5090 | bfd_vma |
| 5091 | ppc64_elf_toc (obfd) |
| 5092 | bfd *obfd; |
| 5093 | { |
| 5094 | asection *s; |
| 5095 | bfd_vma TOCstart; |
| 5096 | |
| 5097 | /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
| 5098 | order. The TOC starts where the first of these sections starts. */ |
| 5099 | s = bfd_get_section_by_name (obfd, ".got"); |
| 5100 | if (s == NULL) |
| 5101 | s = bfd_get_section_by_name (obfd, ".toc"); |
| 5102 | if (s == NULL) |
| 5103 | s = bfd_get_section_by_name (obfd, ".tocbss"); |
| 5104 | if (s == NULL) |
| 5105 | s = bfd_get_section_by_name (obfd, ".plt"); |
| 5106 | if (s == NULL) |
| 5107 | { |
| 5108 | /* This may happen for |
| 5109 | o references to TOC base (SYM@toc / TOC[tc0]) without a |
| 5110 | .toc directive |
| 5111 | o bad linker script |
| 5112 | o --gc-sections and empty TOC sections |
| 5113 | |
| 5114 | FIXME: Warn user? */ |
| 5115 | |
| 5116 | /* Look for a likely section. We probably won't even be |
| 5117 | using TOCstart. */ |
| 5118 | for (s = obfd->sections; s != NULL; s = s->next) |
| 5119 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) |
| 5120 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
| 5121 | break; |
| 5122 | if (s == NULL) |
| 5123 | for (s = obfd->sections; s != NULL; s = s->next) |
| 5124 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) |
| 5125 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
| 5126 | break; |
| 5127 | if (s == NULL) |
| 5128 | for (s = obfd->sections; s != NULL; s = s->next) |
| 5129 | if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
| 5130 | break; |
| 5131 | if (s == NULL) |
| 5132 | for (s = obfd->sections; s != NULL; s = s->next) |
| 5133 | if ((s->flags & SEC_ALLOC) == SEC_ALLOC) |
| 5134 | break; |
| 5135 | } |
| 5136 | |
| 5137 | TOCstart = 0; |
| 5138 | if (s != NULL) |
| 5139 | TOCstart = s->output_section->vma + s->output_offset; |
| 5140 | |
| 5141 | return TOCstart; |
| 5142 | } |
| 5143 | |
| 5144 | /* Build all the stubs associated with the current output file. |
| 5145 | The stubs are kept in a hash table attached to the main linker |
| 5146 | hash table. This function is called via gldelf64ppc_finish. */ |
| 5147 | |
| 5148 | bfd_boolean |
| 5149 | ppc64_elf_build_stubs (info) |
| 5150 | struct bfd_link_info *info; |
| 5151 | { |
| 5152 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 5153 | asection *stub_sec; |
| 5154 | bfd_vma plt_r2; |
| 5155 | bfd_byte *p; |
| 5156 | |
| 5157 | for (stub_sec = htab->stub_bfd->sections; |
| 5158 | stub_sec != NULL; |
| 5159 | stub_sec = stub_sec->next) |
| 5160 | { |
| 5161 | bfd_size_type size; |
| 5162 | |
| 5163 | /* Allocate memory to hold the linker stubs. */ |
| 5164 | size = stub_sec->_raw_size; |
| 5165 | if (size != 0) |
| 5166 | { |
| 5167 | stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size); |
| 5168 | if (stub_sec->contents == NULL) |
| 5169 | return FALSE; |
| 5170 | } |
| 5171 | stub_sec->_cooked_size = 0; |
| 5172 | } |
| 5173 | |
| 5174 | if (htab->splt != NULL) |
| 5175 | { |
| 5176 | unsigned int indx; |
| 5177 | |
| 5178 | /* Build the .glink plt call stub. */ |
| 5179 | plt_r2 = (htab->splt->output_offset |
| 5180 | + htab->splt->output_section->vma |
| 5181 | - elf_gp (htab->splt->output_section->owner) |
| 5182 | - TOC_BASE_OFF); |
| 5183 | p = htab->sglink->contents; |
| 5184 | p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1); |
| 5185 | while (p < htab->sglink->contents + GLINK_CALL_STUB_SIZE) |
| 5186 | { |
| 5187 | bfd_put_32 (htab->sglink->owner, NOP, p); |
| 5188 | p += 4; |
| 5189 | } |
| 5190 | |
| 5191 | /* Build the .glink lazy link call stubs. */ |
| 5192 | indx = 0; |
| 5193 | while (p < htab->sglink->contents + htab->sglink->_raw_size) |
| 5194 | { |
| 5195 | if (indx < 0x8000) |
| 5196 | { |
| 5197 | bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p); |
| 5198 | p += 4; |
| 5199 | } |
| 5200 | else |
| 5201 | { |
| 5202 | bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p); |
| 5203 | p += 4; |
| 5204 | bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); |
| 5205 | p += 4; |
| 5206 | } |
| 5207 | bfd_put_32 (htab->sglink->owner, |
| 5208 | B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p); |
| 5209 | indx++; |
| 5210 | p += 4; |
| 5211 | } |
| 5212 | htab->sglink->_cooked_size = p - htab->sglink->contents; |
| 5213 | } |
| 5214 | |
| 5215 | if (htab->sbrlt->_raw_size != 0) |
| 5216 | { |
| 5217 | htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner, |
| 5218 | htab->sbrlt->_raw_size); |
| 5219 | if (htab->sbrlt->contents == NULL) |
| 5220 | return FALSE; |
| 5221 | } |
| 5222 | |
| 5223 | /* Build the stubs as directed by the stub hash table. */ |
| 5224 | bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); |
| 5225 | |
| 5226 | for (stub_sec = htab->stub_bfd->sections; |
| 5227 | stub_sec != NULL; |
| 5228 | stub_sec = stub_sec->next) |
| 5229 | { |
| 5230 | if (stub_sec->_raw_size != stub_sec->_cooked_size) |
| 5231 | break; |
| 5232 | } |
| 5233 | |
| 5234 | if (stub_sec != NULL |
| 5235 | || htab->sglink->_raw_size != htab->sglink->_cooked_size) |
| 5236 | { |
| 5237 | htab->stub_error = TRUE; |
| 5238 | (*_bfd_error_handler) (_("stubs don't match calculated size")); |
| 5239 | } |
| 5240 | |
| 5241 | return !htab->stub_error; |
| 5242 | } |
| 5243 | |
| 5244 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 5245 | to handle the relocations for a section. |
| 5246 | |
| 5247 | The relocs are always passed as Rela structures; if the section |
| 5248 | actually uses Rel structures, the r_addend field will always be |
| 5249 | zero. |
| 5250 | |
| 5251 | This function is responsible for adjust the section contents as |
| 5252 | necessary, and (if using Rela relocs and generating a |
| 5253 | relocateable output file) adjusting the reloc addend as |
| 5254 | necessary. |
| 5255 | |
| 5256 | This function does not have to worry about setting the reloc |
| 5257 | address or the reloc symbol index. |
| 5258 | |
| 5259 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 5260 | |
| 5261 | LOCAL_SECTIONS is an array giving the section in the input file |
| 5262 | corresponding to the st_shndx field of each local symbol. |
| 5263 | |
| 5264 | The global hash table entry for the global symbols can be found |
| 5265 | via elf_sym_hashes (input_bfd). |
| 5266 | |
| 5267 | When generating relocateable output, this function must handle |
| 5268 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 5269 | going to be the section symbol corresponding to the output |
| 5270 | section, which means that the addend must be adjusted |
| 5271 | accordingly. */ |
| 5272 | |
| 5273 | static bfd_boolean |
| 5274 | ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 5275 | contents, relocs, local_syms, local_sections) |
| 5276 | bfd *output_bfd; |
| 5277 | struct bfd_link_info *info; |
| 5278 | bfd *input_bfd; |
| 5279 | asection *input_section; |
| 5280 | bfd_byte *contents; |
| 5281 | Elf_Internal_Rela *relocs; |
| 5282 | Elf_Internal_Sym *local_syms; |
| 5283 | asection **local_sections; |
| 5284 | { |
| 5285 | struct ppc_link_hash_table *htab; |
| 5286 | Elf_Internal_Shdr *symtab_hdr; |
| 5287 | struct elf_link_hash_entry **sym_hashes; |
| 5288 | Elf_Internal_Rela *rel; |
| 5289 | Elf_Internal_Rela *relend; |
| 5290 | bfd_vma *local_got_offsets; |
| 5291 | bfd_vma TOCstart; |
| 5292 | bfd_boolean ret = TRUE; |
| 5293 | bfd_boolean is_opd; |
| 5294 | /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| 5295 | bfd_boolean is_power4 = FALSE; |
| 5296 | |
| 5297 | if (info->relocateable) |
| 5298 | return TRUE; |
| 5299 | |
| 5300 | /* Initialize howto table if needed. */ |
| 5301 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 5302 | ppc_howto_init (); |
| 5303 | |
| 5304 | htab = ppc_hash_table (info); |
| 5305 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 5306 | TOCstart = elf_gp (output_bfd); |
| 5307 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 5308 | sym_hashes = elf_sym_hashes (input_bfd); |
| 5309 | is_opd = elf_section_data (input_section)->tdata != NULL; |
| 5310 | |
| 5311 | rel = relocs; |
| 5312 | relend = relocs + input_section->reloc_count; |
| 5313 | for (; rel < relend; rel++) |
| 5314 | { |
| 5315 | enum elf_ppc_reloc_type r_type; |
| 5316 | bfd_vma offset; |
| 5317 | bfd_vma addend; |
| 5318 | bfd_reloc_status_type r; |
| 5319 | Elf_Internal_Sym *sym; |
| 5320 | asection *sec; |
| 5321 | struct elf_link_hash_entry *h; |
| 5322 | struct elf_link_hash_entry *fdh; |
| 5323 | const char *sym_name; |
| 5324 | unsigned long r_symndx; |
| 5325 | bfd_vma relocation; |
| 5326 | bfd_boolean unresolved_reloc; |
| 5327 | bfd_boolean warned; |
| 5328 | long insn; |
| 5329 | struct ppc_stub_hash_entry *stub_entry; |
| 5330 | bfd_vma max_br_offset; |
| 5331 | bfd_vma from; |
| 5332 | |
| 5333 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
| 5334 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 5335 | offset = rel->r_offset; |
| 5336 | addend = rel->r_addend; |
| 5337 | r = bfd_reloc_other; |
| 5338 | sym = (Elf_Internal_Sym *) 0; |
| 5339 | sec = (asection *) 0; |
| 5340 | h = (struct elf_link_hash_entry *) 0; |
| 5341 | sym_name = (const char *) 0; |
| 5342 | unresolved_reloc = FALSE; |
| 5343 | warned = FALSE; |
| 5344 | |
| 5345 | if (r_type == R_PPC64_TOC) |
| 5346 | { |
| 5347 | /* Relocation value is TOC base. Symbol is ignored. */ |
| 5348 | relocation = TOCstart + TOC_BASE_OFF; |
| 5349 | } |
| 5350 | else if (r_symndx < symtab_hdr->sh_info) |
| 5351 | { |
| 5352 | /* It's a local symbol. */ |
| 5353 | sym = local_syms + r_symndx; |
| 5354 | sec = local_sections[r_symndx]; |
| 5355 | sym_name = "<local symbol>"; |
| 5356 | |
| 5357 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| 5358 | /* rel may have changed, update our copy of addend. */ |
| 5359 | addend = rel->r_addend; |
| 5360 | |
| 5361 | if (elf_section_data (sec) != NULL) |
| 5362 | { |
| 5363 | long *opd_sym_adjust; |
| 5364 | |
| 5365 | opd_sym_adjust = (long *) elf_section_data (sec)->tdata; |
| 5366 | if (opd_sym_adjust != NULL && sym->st_value % 24 == 0) |
| 5367 | relocation += opd_sym_adjust[sym->st_value / 24]; |
| 5368 | } |
| 5369 | } |
| 5370 | else |
| 5371 | { |
| 5372 | /* It's a global symbol. */ |
| 5373 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5374 | while (h->root.type == bfd_link_hash_indirect |
| 5375 | || h->root.type == bfd_link_hash_warning) |
| 5376 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5377 | sym_name = h->root.root.string; |
| 5378 | relocation = 0; |
| 5379 | if (h->root.type == bfd_link_hash_defined |
| 5380 | || h->root.type == bfd_link_hash_defweak) |
| 5381 | { |
| 5382 | sec = h->root.u.def.section; |
| 5383 | if (sec->output_section == NULL) |
| 5384 | /* Set a flag that will be cleared later if we find a |
| 5385 | relocation value for this symbol. output_section |
| 5386 | is typically NULL for symbols satisfied by a shared |
| 5387 | library. */ |
| 5388 | unresolved_reloc = TRUE; |
| 5389 | else |
| 5390 | relocation = (h->root.u.def.value |
| 5391 | + sec->output_section->vma |
| 5392 | + sec->output_offset); |
| 5393 | } |
| 5394 | else if (h->root.type == bfd_link_hash_undefweak) |
| 5395 | ; |
| 5396 | else if (info->shared |
| 5397 | && (!info->symbolic || info->allow_shlib_undefined) |
| 5398 | && !info->no_undefined |
| 5399 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 5400 | ; |
| 5401 | else |
| 5402 | { |
| 5403 | if (! ((*info->callbacks->undefined_symbol) |
| 5404 | (info, h->root.root.string, input_bfd, input_section, |
| 5405 | offset, (!info->shared |
| 5406 | || info->no_undefined |
| 5407 | || ELF_ST_VISIBILITY (h->other))))) |
| 5408 | return FALSE; |
| 5409 | warned = TRUE; |
| 5410 | } |
| 5411 | } |
| 5412 | |
| 5413 | /* First handle relocations that tweak non-addend part of insn. */ |
| 5414 | insn = 0; |
| 5415 | switch (r_type) |
| 5416 | { |
| 5417 | default: |
| 5418 | break; |
| 5419 | |
| 5420 | /* Branch taken prediction relocations. */ |
| 5421 | case R_PPC64_ADDR14_BRTAKEN: |
| 5422 | case R_PPC64_REL14_BRTAKEN: |
| 5423 | insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| 5424 | /* Fall thru. */ |
| 5425 | |
| 5426 | /* Branch not taken prediction relocations. */ |
| 5427 | case R_PPC64_ADDR14_BRNTAKEN: |
| 5428 | case R_PPC64_REL14_BRNTAKEN: |
| 5429 | insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21); |
| 5430 | if (is_power4) |
| 5431 | { |
| 5432 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
| 5433 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| 5434 | for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| 5435 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| 5436 | insn |= 0x02 << 21; |
| 5437 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| 5438 | insn |= 0x08 << 21; |
| 5439 | else |
| 5440 | break; |
| 5441 | } |
| 5442 | else |
| 5443 | { |
| 5444 | from = (offset |
| 5445 | + input_section->output_offset |
| 5446 | + input_section->output_section->vma); |
| 5447 | |
| 5448 | /* Invert 'y' bit if not the default. */ |
| 5449 | if ((bfd_signed_vma) (relocation + addend - from) < 0) |
| 5450 | insn ^= 0x01 << 21; |
| 5451 | } |
| 5452 | |
| 5453 | bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset); |
| 5454 | break; |
| 5455 | |
| 5456 | case R_PPC64_REL24: |
| 5457 | /* A REL24 branching to a linkage function is followed by a |
| 5458 | nop. We replace the nop with a ld in order to restore |
| 5459 | the TOC base pointer. Only calls to shared objects need |
| 5460 | to alter the TOC base. These are recognized by their |
| 5461 | need for a PLT entry. */ |
| 5462 | if (h != NULL |
| 5463 | && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL |
| 5464 | && fdh->plt.offset != (bfd_vma) -1 |
| 5465 | && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, |
| 5466 | rel, htab)) != NULL) |
| 5467 | { |
| 5468 | bfd_boolean can_plt_call = 0; |
| 5469 | |
| 5470 | if (offset + 8 <= input_section->_cooked_size) |
| 5471 | { |
| 5472 | insn = bfd_get_32 (input_bfd, contents + offset + 4); |
| 5473 | if (insn == NOP |
| 5474 | || insn == CROR_151515 || insn == CROR_313131) |
| 5475 | { |
| 5476 | bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1, |
| 5477 | contents + offset + 4); |
| 5478 | can_plt_call = 1; |
| 5479 | } |
| 5480 | } |
| 5481 | |
| 5482 | if (!can_plt_call) |
| 5483 | { |
| 5484 | /* If this is a plain branch rather than a branch |
| 5485 | and link, don't require a nop. */ |
| 5486 | insn = bfd_get_32 (input_bfd, contents + offset); |
| 5487 | if ((insn & 1) == 0) |
| 5488 | can_plt_call = 1; |
| 5489 | } |
| 5490 | |
| 5491 | if (can_plt_call) |
| 5492 | { |
| 5493 | relocation = (stub_entry->stub_offset |
| 5494 | + stub_entry->stub_sec->output_offset |
| 5495 | + stub_entry->stub_sec->output_section->vma); |
| 5496 | addend = 0; |
| 5497 | unresolved_reloc = FALSE; |
| 5498 | } |
| 5499 | } |
| 5500 | |
| 5501 | if (h != NULL |
| 5502 | && h->root.type == bfd_link_hash_undefweak |
| 5503 | && relocation == 0 |
| 5504 | && addend == 0) |
| 5505 | { |
| 5506 | /* Tweak calls to undefined weak functions to point at a |
| 5507 | blr. We can thus call a weak function without first |
| 5508 | checking whether the function is defined. We have a |
| 5509 | blr at the end of .sfpr. */ |
| 5510 | BFD_ASSERT (htab->sfpr->_raw_size != 0); |
| 5511 | relocation = (htab->sfpr->_raw_size - 4 |
| 5512 | + htab->sfpr->output_offset |
| 5513 | + htab->sfpr->output_section->vma); |
| 5514 | from = (offset |
| 5515 | + input_section->output_offset |
| 5516 | + input_section->output_section->vma); |
| 5517 | |
| 5518 | /* But let's not be silly about it. If the blr isn't in |
| 5519 | reach, just go to the next instruction. */ |
| 5520 | if (relocation - from + (1 << 25) >= (1 << 26) |
| 5521 | || htab->sfpr->_raw_size == 0) |
| 5522 | relocation = from + 4; |
| 5523 | } |
| 5524 | break; |
| 5525 | } |
| 5526 | |
| 5527 | /* Set `addend'. */ |
| 5528 | switch (r_type) |
| 5529 | { |
| 5530 | default: |
| 5531 | (*_bfd_error_handler) |
| 5532 | (_("%s: unknown relocation type %d for symbol %s"), |
| 5533 | bfd_archive_filename (input_bfd), (int) r_type, sym_name); |
| 5534 | |
| 5535 | bfd_set_error (bfd_error_bad_value); |
| 5536 | ret = FALSE; |
| 5537 | continue; |
| 5538 | |
| 5539 | case R_PPC64_NONE: |
| 5540 | case R_PPC_GNU_VTINHERIT: |
| 5541 | case R_PPC_GNU_VTENTRY: |
| 5542 | continue; |
| 5543 | |
| 5544 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 5545 | address in the GOT as relocation value instead of the |
| 5546 | symbols value itself. Also, create a GOT entry for the |
| 5547 | symbol and put the symbol value there. */ |
| 5548 | case R_PPC64_GOT16: |
| 5549 | case R_PPC64_GOT16_LO: |
| 5550 | case R_PPC64_GOT16_HI: |
| 5551 | case R_PPC64_GOT16_HA: |
| 5552 | case R_PPC64_GOT16_DS: |
| 5553 | case R_PPC64_GOT16_LO_DS: |
| 5554 | { |
| 5555 | /* Relocation is to the entry for this symbol in the global |
| 5556 | offset table. */ |
| 5557 | bfd_vma off; |
| 5558 | |
| 5559 | if (htab->sgot == NULL) |
| 5560 | abort (); |
| 5561 | |
| 5562 | if (h != NULL) |
| 5563 | { |
| 5564 | bfd_boolean dyn; |
| 5565 | |
| 5566 | off = h->got.offset; |
| 5567 | dyn = htab->elf.dynamic_sections_created; |
| 5568 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
| 5569 | || (info->shared |
| 5570 | && (info->symbolic |
| 5571 | || h->dynindx == -1 |
| 5572 | || (h->elf_link_hash_flags |
| 5573 | & ELF_LINK_FORCED_LOCAL)) |
| 5574 | && (h->elf_link_hash_flags |
| 5575 | & ELF_LINK_HASH_DEF_REGULAR))) |
| 5576 | { |
| 5577 | /* This is actually a static link, or it is a |
| 5578 | -Bsymbolic link and the symbol is defined |
| 5579 | locally, or the symbol was forced to be local |
| 5580 | because of a version file. We must initialize |
| 5581 | this entry in the global offset table. Since the |
| 5582 | offset must always be a multiple of 8, we use the |
| 5583 | least significant bit to record whether we have |
| 5584 | initialized it already. |
| 5585 | |
| 5586 | When doing a dynamic link, we create a .rel.got |
| 5587 | relocation entry to initialize the value. This |
| 5588 | is done in the finish_dynamic_symbol routine. */ |
| 5589 | if ((off & 1) != 0) |
| 5590 | off &= ~1; |
| 5591 | else |
| 5592 | { |
| 5593 | bfd_put_64 (output_bfd, relocation, |
| 5594 | htab->sgot->contents + off); |
| 5595 | h->got.offset |= 1; |
| 5596 | } |
| 5597 | } |
| 5598 | else |
| 5599 | unresolved_reloc = FALSE; |
| 5600 | } |
| 5601 | else |
| 5602 | { |
| 5603 | if (local_got_offsets == NULL) |
| 5604 | abort (); |
| 5605 | |
| 5606 | off = local_got_offsets[r_symndx]; |
| 5607 | |
| 5608 | /* The offset must always be a multiple of 8. We use |
| 5609 | the least significant bit to record whether we have |
| 5610 | already processed this entry. */ |
| 5611 | if ((off & 1) != 0) |
| 5612 | off &= ~1; |
| 5613 | else |
| 5614 | { |
| 5615 | bfd_put_64 (output_bfd, relocation, |
| 5616 | htab->sgot->contents + off); |
| 5617 | |
| 5618 | if (info->shared) |
| 5619 | { |
| 5620 | Elf_Internal_Rela outrel; |
| 5621 | bfd_byte *loc; |
| 5622 | |
| 5623 | /* We need to generate a R_PPC64_RELATIVE reloc |
| 5624 | for the dynamic linker. */ |
| 5625 | outrel.r_offset = (htab->sgot->output_section->vma |
| 5626 | + htab->sgot->output_offset |
| 5627 | + off); |
| 5628 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 5629 | outrel.r_addend = relocation; |
| 5630 | loc = htab->srelgot->contents; |
| 5631 | loc += (htab->srelgot->reloc_count++ |
| 5632 | * sizeof (Elf64_External_Rela)); |
| 5633 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 5634 | } |
| 5635 | |
| 5636 | local_got_offsets[r_symndx] |= 1; |
| 5637 | } |
| 5638 | } |
| 5639 | |
| 5640 | if (off >= (bfd_vma) -2) |
| 5641 | abort (); |
| 5642 | |
| 5643 | relocation = htab->sgot->output_offset + off; |
| 5644 | |
| 5645 | /* TOC base (r2) is TOC start plus 0x8000. */ |
| 5646 | addend -= TOC_BASE_OFF; |
| 5647 | } |
| 5648 | break; |
| 5649 | |
| 5650 | case R_PPC64_PLT16_HA: |
| 5651 | case R_PPC64_PLT16_HI: |
| 5652 | case R_PPC64_PLT16_LO: |
| 5653 | case R_PPC64_PLT32: |
| 5654 | case R_PPC64_PLT64: |
| 5655 | /* Relocation is to the entry for this symbol in the |
| 5656 | procedure linkage table. */ |
| 5657 | |
| 5658 | /* Resolve a PLT reloc against a local symbol directly, |
| 5659 | without using the procedure linkage table. */ |
| 5660 | if (h == NULL) |
| 5661 | break; |
| 5662 | |
| 5663 | if (h->plt.offset == (bfd_vma) -1 |
| 5664 | || htab->splt == NULL) |
| 5665 | { |
| 5666 | /* We didn't make a PLT entry for this symbol. This |
| 5667 | happens when statically linking PIC code, or when |
| 5668 | using -Bsymbolic. */ |
| 5669 | break; |
| 5670 | } |
| 5671 | |
| 5672 | relocation = (htab->splt->output_section->vma |
| 5673 | + htab->splt->output_offset |
| 5674 | + h->plt.offset); |
| 5675 | unresolved_reloc = FALSE; |
| 5676 | break; |
| 5677 | |
| 5678 | /* TOC16 relocs. We want the offset relative to the TOC base, |
| 5679 | which is the address of the start of the TOC plus 0x8000. |
| 5680 | The TOC consists of sections .got, .toc, .tocbss, and .plt, |
| 5681 | in this order. */ |
| 5682 | case R_PPC64_TOC16: |
| 5683 | case R_PPC64_TOC16_LO: |
| 5684 | case R_PPC64_TOC16_HI: |
| 5685 | case R_PPC64_TOC16_DS: |
| 5686 | case R_PPC64_TOC16_LO_DS: |
| 5687 | case R_PPC64_TOC16_HA: |
| 5688 | addend -= TOCstart + TOC_BASE_OFF; |
| 5689 | break; |
| 5690 | |
| 5691 | /* Relocate against the beginning of the section. */ |
| 5692 | case R_PPC64_SECTOFF: |
| 5693 | case R_PPC64_SECTOFF_LO: |
| 5694 | case R_PPC64_SECTOFF_HI: |
| 5695 | case R_PPC64_SECTOFF_DS: |
| 5696 | case R_PPC64_SECTOFF_LO_DS: |
| 5697 | case R_PPC64_SECTOFF_HA: |
| 5698 | if (sec != (asection *) 0) |
| 5699 | addend -= sec->output_section->vma; |
| 5700 | break; |
| 5701 | |
| 5702 | case R_PPC64_REL14: |
| 5703 | case R_PPC64_REL14_BRNTAKEN: |
| 5704 | case R_PPC64_REL14_BRTAKEN: |
| 5705 | case R_PPC64_REL24: |
| 5706 | break; |
| 5707 | |
| 5708 | /* Relocations that may need to be propagated if this is a |
| 5709 | dynamic object. */ |
| 5710 | case R_PPC64_REL32: |
| 5711 | case R_PPC64_REL64: |
| 5712 | case R_PPC64_ADDR14: |
| 5713 | case R_PPC64_ADDR14_BRNTAKEN: |
| 5714 | case R_PPC64_ADDR14_BRTAKEN: |
| 5715 | case R_PPC64_ADDR16: |
| 5716 | case R_PPC64_ADDR16_DS: |
| 5717 | case R_PPC64_ADDR16_HA: |
| 5718 | case R_PPC64_ADDR16_HI: |
| 5719 | case R_PPC64_ADDR16_HIGHER: |
| 5720 | case R_PPC64_ADDR16_HIGHERA: |
| 5721 | case R_PPC64_ADDR16_HIGHEST: |
| 5722 | case R_PPC64_ADDR16_HIGHESTA: |
| 5723 | case R_PPC64_ADDR16_LO: |
| 5724 | case R_PPC64_ADDR16_LO_DS: |
| 5725 | case R_PPC64_ADDR24: |
| 5726 | case R_PPC64_ADDR30: |
| 5727 | case R_PPC64_ADDR32: |
| 5728 | case R_PPC64_ADDR64: |
| 5729 | case R_PPC64_UADDR16: |
| 5730 | case R_PPC64_UADDR32: |
| 5731 | case R_PPC64_UADDR64: |
| 5732 | /* r_symndx will be zero only for relocs against symbols |
| 5733 | from removed linkonce sections, or sections discarded by |
| 5734 | a linker script. */ |
| 5735 | if (r_symndx == 0) |
| 5736 | break; |
| 5737 | /* Fall thru. */ |
| 5738 | |
| 5739 | case R_PPC64_TOC: |
| 5740 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 5741 | break; |
| 5742 | |
| 5743 | if (NO_OPD_RELOCS && is_opd) |
| 5744 | break; |
| 5745 | |
| 5746 | if ((info->shared |
| 5747 | && (IS_ABSOLUTE_RELOC (r_type) |
| 5748 | || (h != NULL |
| 5749 | && h->dynindx != -1 |
| 5750 | && (! info->symbolic |
| 5751 | || (h->elf_link_hash_flags |
| 5752 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 5753 | || (!info->shared |
| 5754 | && h != NULL |
| 5755 | && h->dynindx != -1 |
| 5756 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 5757 | && (((h->elf_link_hash_flags |
| 5758 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 5759 | && (h->elf_link_hash_flags |
| 5760 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 5761 | || h->root.type == bfd_link_hash_undefweak |
| 5762 | || h->root.type == bfd_link_hash_undefined))) |
| 5763 | { |
| 5764 | Elf_Internal_Rela outrel; |
| 5765 | bfd_boolean skip, relocate; |
| 5766 | asection *sreloc; |
| 5767 | bfd_byte *loc; |
| 5768 | |
| 5769 | /* When generating a dynamic object, these relocations |
| 5770 | are copied into the output file to be resolved at run |
| 5771 | time. */ |
| 5772 | |
| 5773 | skip = FALSE; |
| 5774 | relocate = FALSE; |
| 5775 | |
| 5776 | outrel.r_offset = |
| 5777 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 5778 | rel->r_offset); |
| 5779 | if (outrel.r_offset == (bfd_vma) -1) |
| 5780 | skip = TRUE; |
| 5781 | else if (outrel.r_offset == (bfd_vma) -2) |
| 5782 | skip = TRUE, relocate = TRUE; |
| 5783 | outrel.r_offset += (input_section->output_section->vma |
| 5784 | + input_section->output_offset); |
| 5785 | outrel.r_addend = addend; |
| 5786 | |
| 5787 | if (skip) |
| 5788 | memset (&outrel, 0, sizeof outrel); |
| 5789 | else if (h != NULL |
| 5790 | && h->dynindx != -1 |
| 5791 | && !is_opd |
| 5792 | && (!IS_ABSOLUTE_RELOC (r_type) |
| 5793 | || !info->shared |
| 5794 | || !info->symbolic |
| 5795 | || (h->elf_link_hash_flags |
| 5796 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 5797 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| 5798 | else |
| 5799 | { |
| 5800 | /* This symbol is local, or marked to become local, |
| 5801 | or this is an opd section reloc which must point |
| 5802 | at a local function. */ |
| 5803 | outrel.r_addend += relocation; |
| 5804 | relocate = TRUE; |
| 5805 | if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
| 5806 | { |
| 5807 | if (is_opd && h != NULL) |
| 5808 | { |
| 5809 | /* Lie about opd entries. This case occurs |
| 5810 | when building shared libraries and we |
| 5811 | reference a function in another shared |
| 5812 | lib. The same thing happens for a weak |
| 5813 | definition in an application that's |
| 5814 | overridden by a strong definition in a |
| 5815 | shared lib. (I believe this is a generic |
| 5816 | bug in binutils handling of weak syms.) |
| 5817 | In these cases we won't use the opd |
| 5818 | entry in this lib. */ |
| 5819 | unresolved_reloc = FALSE; |
| 5820 | } |
| 5821 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 5822 | } |
| 5823 | else |
| 5824 | { |
| 5825 | long indx = 0; |
| 5826 | |
| 5827 | if (bfd_is_abs_section (sec)) |
| 5828 | ; |
| 5829 | else if (sec == NULL || sec->owner == NULL) |
| 5830 | { |
| 5831 | bfd_set_error (bfd_error_bad_value); |
| 5832 | return FALSE; |
| 5833 | } |
| 5834 | else |
| 5835 | { |
| 5836 | asection *osec; |
| 5837 | |
| 5838 | osec = sec->output_section; |
| 5839 | indx = elf_section_data (osec)->dynindx; |
| 5840 | |
| 5841 | /* We are turning this relocation into one |
| 5842 | against a section symbol, so subtract out |
| 5843 | the output section's address but not the |
| 5844 | offset of the input section in the output |
| 5845 | section. */ |
| 5846 | outrel.r_addend -= osec->vma; |
| 5847 | } |
| 5848 | |
| 5849 | outrel.r_info = ELF64_R_INFO (indx, r_type); |
| 5850 | } |
| 5851 | } |
| 5852 | |
| 5853 | sreloc = elf_section_data (input_section)->sreloc; |
| 5854 | if (sreloc == NULL) |
| 5855 | abort (); |
| 5856 | |
| 5857 | loc = sreloc->contents; |
| 5858 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| 5859 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 5860 | |
| 5861 | /* If this reloc is against an external symbol, it will |
| 5862 | be computed at runtime, so there's no need to do |
| 5863 | anything now. */ |
| 5864 | if (! relocate) |
| 5865 | continue; |
| 5866 | } |
| 5867 | break; |
| 5868 | |
| 5869 | case R_PPC64_COPY: |
| 5870 | case R_PPC64_GLOB_DAT: |
| 5871 | case R_PPC64_JMP_SLOT: |
| 5872 | case R_PPC64_RELATIVE: |
| 5873 | /* We shouldn't ever see these dynamic relocs in relocatable |
| 5874 | files. */ |
| 5875 | /* Fall thru */ |
| 5876 | |
| 5877 | case R_PPC64_PLTGOT16: |
| 5878 | case R_PPC64_PLTGOT16_DS: |
| 5879 | case R_PPC64_PLTGOT16_HA: |
| 5880 | case R_PPC64_PLTGOT16_HI: |
| 5881 | case R_PPC64_PLTGOT16_LO: |
| 5882 | case R_PPC64_PLTGOT16_LO_DS: |
| 5883 | case R_PPC64_PLTREL32: |
| 5884 | case R_PPC64_PLTREL64: |
| 5885 | /* These ones haven't been implemented yet. */ |
| 5886 | |
| 5887 | (*_bfd_error_handler) |
| 5888 | (_("%s: Relocation %s is not supported for symbol %s."), |
| 5889 | bfd_archive_filename (input_bfd), |
| 5890 | ppc64_elf_howto_table[(int) r_type]->name, sym_name); |
| 5891 | |
| 5892 | bfd_set_error (bfd_error_invalid_operation); |
| 5893 | ret = FALSE; |
| 5894 | continue; |
| 5895 | } |
| 5896 | |
| 5897 | /* Do any further special processing. */ |
| 5898 | switch (r_type) |
| 5899 | { |
| 5900 | default: |
| 5901 | break; |
| 5902 | |
| 5903 | case R_PPC64_ADDR16_HA: |
| 5904 | case R_PPC64_ADDR16_HIGHERA: |
| 5905 | case R_PPC64_ADDR16_HIGHESTA: |
| 5906 | case R_PPC64_PLT16_HA: |
| 5907 | case R_PPC64_TOC16_HA: |
| 5908 | case R_PPC64_SECTOFF_HA: |
| 5909 | /* It's just possible that this symbol is a weak symbol |
| 5910 | that's not actually defined anywhere. In that case, |
| 5911 | 'sec' would be NULL, and we should leave the symbol |
| 5912 | alone (it will be set to zero elsewhere in the link). */ |
| 5913 | if (sec != NULL) |
| 5914 | /* Add 0x10000 if sign bit in 0:15 is set. */ |
| 5915 | addend += ((relocation + addend) & 0x8000) << 1; |
| 5916 | break; |
| 5917 | |
| 5918 | case R_PPC64_ADDR16_DS: |
| 5919 | case R_PPC64_ADDR16_LO_DS: |
| 5920 | case R_PPC64_GOT16_DS: |
| 5921 | case R_PPC64_GOT16_LO_DS: |
| 5922 | case R_PPC64_PLT16_LO_DS: |
| 5923 | case R_PPC64_SECTOFF_DS: |
| 5924 | case R_PPC64_SECTOFF_LO_DS: |
| 5925 | case R_PPC64_TOC16_DS: |
| 5926 | case R_PPC64_TOC16_LO_DS: |
| 5927 | case R_PPC64_PLTGOT16_DS: |
| 5928 | case R_PPC64_PLTGOT16_LO_DS: |
| 5929 | if (((relocation + addend) & 3) != 0) |
| 5930 | { |
| 5931 | (*_bfd_error_handler) |
| 5932 | (_("%s: error: relocation %s not a multiple of 4"), |
| 5933 | bfd_archive_filename (input_bfd), |
| 5934 | ppc64_elf_howto_table[(int) r_type]->name); |
| 5935 | bfd_set_error (bfd_error_bad_value); |
| 5936 | ret = FALSE; |
| 5937 | continue; |
| 5938 | } |
| 5939 | break; |
| 5940 | |
| 5941 | case R_PPC64_REL14: |
| 5942 | case R_PPC64_REL14_BRNTAKEN: |
| 5943 | case R_PPC64_REL14_BRTAKEN: |
| 5944 | max_br_offset = 1 << 15; |
| 5945 | goto branch_check; |
| 5946 | |
| 5947 | case R_PPC64_REL24: |
| 5948 | max_br_offset = 1 << 25; |
| 5949 | |
| 5950 | branch_check: |
| 5951 | /* If the branch is out of reach, then redirect the |
| 5952 | call to the local stub for this function. */ |
| 5953 | from = (offset |
| 5954 | + input_section->output_offset |
| 5955 | + input_section->output_section->vma); |
| 5956 | if (relocation + addend - from + max_br_offset >= 2 * max_br_offset |
| 5957 | && (stub_entry = ppc_get_stub_entry (input_section, sec, h, |
| 5958 | rel, htab)) != NULL) |
| 5959 | { |
| 5960 | /* Munge up the value and addend so that we call the stub |
| 5961 | rather than the procedure directly. */ |
| 5962 | relocation = (stub_entry->stub_offset |
| 5963 | + stub_entry->stub_sec->output_offset |
| 5964 | + stub_entry->stub_sec->output_section->vma); |
| 5965 | addend = 0; |
| 5966 | } |
| 5967 | break; |
| 5968 | } |
| 5969 | |
| 5970 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 5971 | because such sections are not SEC_ALLOC and thus ld.so will |
| 5972 | not process them. */ |
| 5973 | if (unresolved_reloc |
| 5974 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 5975 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| 5976 | { |
| 5977 | (*_bfd_error_handler) |
| 5978 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), |
| 5979 | bfd_archive_filename (input_bfd), |
| 5980 | bfd_get_section_name (input_bfd, input_section), |
| 5981 | (long) rel->r_offset, |
| 5982 | h->root.root.string); |
| 5983 | ret = FALSE; |
| 5984 | } |
| 5985 | |
| 5986 | r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], |
| 5987 | input_bfd, |
| 5988 | input_section, |
| 5989 | contents, |
| 5990 | offset, |
| 5991 | relocation, |
| 5992 | addend); |
| 5993 | |
| 5994 | if (r != bfd_reloc_ok) |
| 5995 | { |
| 5996 | const char *name; |
| 5997 | |
| 5998 | if (h != NULL) |
| 5999 | { |
| 6000 | if (h->root.type == bfd_link_hash_undefweak |
| 6001 | && ppc64_elf_howto_table[(int) r_type]->pc_relative) |
| 6002 | { |
| 6003 | /* Assume this is a call protected by other code that |
| 6004 | detects the symbol is undefined. If this is the case, |
| 6005 | we can safely ignore the overflow. If not, the |
| 6006 | program is hosed anyway, and a little warning isn't |
| 6007 | going to help. */ |
| 6008 | |
| 6009 | continue; |
| 6010 | } |
| 6011 | |
| 6012 | name = h->root.root.string; |
| 6013 | } |
| 6014 | else |
| 6015 | { |
| 6016 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 6017 | symtab_hdr->sh_link, |
| 6018 | sym->st_name); |
| 6019 | if (name == NULL) |
| 6020 | continue; |
| 6021 | if (*name == '\0') |
| 6022 | name = bfd_section_name (input_bfd, sec); |
| 6023 | } |
| 6024 | |
| 6025 | if (r == bfd_reloc_overflow) |
| 6026 | { |
| 6027 | if (warned) |
| 6028 | continue; |
| 6029 | if (!((*info->callbacks->reloc_overflow) |
| 6030 | (info, name, ppc64_elf_howto_table[(int) r_type]->name, |
| 6031 | rel->r_addend, input_bfd, input_section, offset))) |
| 6032 | return FALSE; |
| 6033 | } |
| 6034 | else |
| 6035 | { |
| 6036 | (*_bfd_error_handler) |
| 6037 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), |
| 6038 | bfd_archive_filename (input_bfd), |
| 6039 | bfd_get_section_name (input_bfd, input_section), |
| 6040 | (long) rel->r_offset, name, (int) r); |
| 6041 | ret = FALSE; |
| 6042 | } |
| 6043 | } |
| 6044 | } |
| 6045 | |
| 6046 | return ret; |
| 6047 | } |
| 6048 | |
| 6049 | /* Finish up dynamic symbol handling. We set the contents of various |
| 6050 | dynamic sections here. */ |
| 6051 | |
| 6052 | static bfd_boolean |
| 6053 | ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 6054 | bfd *output_bfd; |
| 6055 | struct bfd_link_info *info; |
| 6056 | struct elf_link_hash_entry *h; |
| 6057 | Elf_Internal_Sym *sym; |
| 6058 | { |
| 6059 | struct ppc_link_hash_table *htab; |
| 6060 | bfd *dynobj; |
| 6061 | |
| 6062 | htab = ppc_hash_table (info); |
| 6063 | dynobj = htab->elf.dynobj; |
| 6064 | |
| 6065 | if (h->plt.offset != (bfd_vma) -1 |
| 6066 | && ((struct ppc_link_hash_entry *) h)->is_func_descriptor) |
| 6067 | { |
| 6068 | Elf_Internal_Rela rela; |
| 6069 | bfd_byte *loc; |
| 6070 | |
| 6071 | /* This symbol has an entry in the procedure linkage table. Set |
| 6072 | it up. */ |
| 6073 | |
| 6074 | if (htab->splt == NULL |
| 6075 | || htab->srelplt == NULL |
| 6076 | || htab->sglink == NULL) |
| 6077 | abort (); |
| 6078 | |
| 6079 | /* Create a JMP_SLOT reloc to inform the dynamic linker to |
| 6080 | fill in the PLT entry. */ |
| 6081 | |
| 6082 | rela.r_offset = (htab->splt->output_section->vma |
| 6083 | + htab->splt->output_offset |
| 6084 | + h->plt.offset); |
| 6085 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
| 6086 | rela.r_addend = 0; |
| 6087 | |
| 6088 | loc = htab->srelplt->contents; |
| 6089 | loc += ((h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE |
| 6090 | * sizeof (Elf64_External_Rela)); |
| 6091 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 6092 | } |
| 6093 | |
| 6094 | if (h->got.offset != (bfd_vma) -1) |
| 6095 | { |
| 6096 | Elf_Internal_Rela rela; |
| 6097 | bfd_byte *loc; |
| 6098 | |
| 6099 | /* This symbol has an entry in the global offset table. Set it |
| 6100 | up. */ |
| 6101 | |
| 6102 | if (htab->sgot == NULL || htab->srelgot == NULL) |
| 6103 | abort (); |
| 6104 | |
| 6105 | rela.r_offset = (htab->sgot->output_section->vma |
| 6106 | + htab->sgot->output_offset |
| 6107 | + (h->got.offset &~ (bfd_vma) 1)); |
| 6108 | |
| 6109 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 6110 | symbol is defined locally or was forced to be local because |
| 6111 | of a version file, we just want to emit a RELATIVE reloc. |
| 6112 | The entry in the global offset table will already have been |
| 6113 | initialized in the relocate_section function. */ |
| 6114 | if (info->shared |
| 6115 | && (info->symbolic |
| 6116 | || h->dynindx == -1 |
| 6117 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| 6118 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 6119 | { |
| 6120 | BFD_ASSERT((h->got.offset & 1) != 0); |
| 6121 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 6122 | rela.r_addend = (h->root.u.def.value |
| 6123 | + h->root.u.def.section->output_section->vma |
| 6124 | + h->root.u.def.section->output_offset); |
| 6125 | } |
| 6126 | else |
| 6127 | { |
| 6128 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 6129 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 6130 | htab->sgot->contents + h->got.offset); |
| 6131 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT); |
| 6132 | rela.r_addend = 0; |
| 6133 | } |
| 6134 | |
| 6135 | loc = htab->srelgot->contents; |
| 6136 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); |
| 6137 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 6138 | } |
| 6139 | |
| 6140 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 6141 | { |
| 6142 | Elf_Internal_Rela rela; |
| 6143 | bfd_byte *loc; |
| 6144 | |
| 6145 | /* This symbol needs a copy reloc. Set it up. */ |
| 6146 | |
| 6147 | if (h->dynindx == -1 |
| 6148 | || (h->root.type != bfd_link_hash_defined |
| 6149 | && h->root.type != bfd_link_hash_defweak) |
| 6150 | || htab->srelbss == NULL) |
| 6151 | abort (); |
| 6152 | |
| 6153 | rela.r_offset = (h->root.u.def.value |
| 6154 | + h->root.u.def.section->output_section->vma |
| 6155 | + h->root.u.def.section->output_offset); |
| 6156 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); |
| 6157 | rela.r_addend = 0; |
| 6158 | loc = htab->srelbss->contents; |
| 6159 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); |
| 6160 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 6161 | } |
| 6162 | |
| 6163 | /* Mark some specially defined symbols as absolute. */ |
| 6164 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0) |
| 6165 | sym->st_shndx = SHN_ABS; |
| 6166 | |
| 6167 | return TRUE; |
| 6168 | } |
| 6169 | |
| 6170 | /* Used to decide how to sort relocs in an optimal manner for the |
| 6171 | dynamic linker, before writing them out. */ |
| 6172 | |
| 6173 | static enum elf_reloc_type_class |
| 6174 | ppc64_elf_reloc_type_class (rela) |
| 6175 | const Elf_Internal_Rela *rela; |
| 6176 | { |
| 6177 | enum elf_ppc_reloc_type r_type; |
| 6178 | |
| 6179 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info); |
| 6180 | switch (r_type) |
| 6181 | { |
| 6182 | case R_PPC64_RELATIVE: |
| 6183 | return reloc_class_relative; |
| 6184 | case R_PPC64_JMP_SLOT: |
| 6185 | return reloc_class_plt; |
| 6186 | case R_PPC64_COPY: |
| 6187 | return reloc_class_copy; |
| 6188 | default: |
| 6189 | return reloc_class_normal; |
| 6190 | } |
| 6191 | } |
| 6192 | |
| 6193 | /* Finish up the dynamic sections. */ |
| 6194 | |
| 6195 | static bfd_boolean |
| 6196 | ppc64_elf_finish_dynamic_sections (output_bfd, info) |
| 6197 | bfd *output_bfd; |
| 6198 | struct bfd_link_info *info; |
| 6199 | { |
| 6200 | struct ppc_link_hash_table *htab; |
| 6201 | bfd *dynobj; |
| 6202 | asection *sdyn; |
| 6203 | |
| 6204 | htab = ppc_hash_table (info); |
| 6205 | dynobj = htab->elf.dynobj; |
| 6206 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 6207 | |
| 6208 | if (htab->elf.dynamic_sections_created) |
| 6209 | { |
| 6210 | Elf64_External_Dyn *dyncon, *dynconend; |
| 6211 | |
| 6212 | if (sdyn == NULL || htab->sgot == NULL) |
| 6213 | abort (); |
| 6214 | |
| 6215 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 6216 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 6217 | for (; dyncon < dynconend; dyncon++) |
| 6218 | { |
| 6219 | Elf_Internal_Dyn dyn; |
| 6220 | asection *s; |
| 6221 | |
| 6222 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 6223 | |
| 6224 | switch (dyn.d_tag) |
| 6225 | { |
| 6226 | default: |
| 6227 | continue; |
| 6228 | |
| 6229 | case DT_PPC64_GLINK: |
| 6230 | dyn.d_un.d_ptr = (htab->sglink->output_section->vma |
| 6231 | + htab->sglink->output_offset); |
| 6232 | break; |
| 6233 | |
| 6234 | case DT_PPC64_OPD: |
| 6235 | s = bfd_get_section_by_name (output_bfd, ".opd"); |
| 6236 | if (s != NULL) |
| 6237 | dyn.d_un.d_ptr = s->vma; |
| 6238 | break; |
| 6239 | |
| 6240 | case DT_PPC64_OPDSZ: |
| 6241 | s = bfd_get_section_by_name (output_bfd, ".opd"); |
| 6242 | if (s != NULL) |
| 6243 | dyn.d_un.d_val = s->_raw_size; |
| 6244 | break; |
| 6245 | |
| 6246 | case DT_PLTGOT: |
| 6247 | dyn.d_un.d_ptr = (htab->splt->output_section->vma |
| 6248 | + htab->splt->output_offset); |
| 6249 | break; |
| 6250 | |
| 6251 | case DT_JMPREL: |
| 6252 | dyn.d_un.d_ptr = (htab->srelplt->output_section->vma |
| 6253 | + htab->srelplt->output_offset); |
| 6254 | break; |
| 6255 | |
| 6256 | case DT_PLTRELSZ: |
| 6257 | dyn.d_un.d_val = htab->srelplt->_raw_size; |
| 6258 | break; |
| 6259 | |
| 6260 | case DT_RELASZ: |
| 6261 | /* Don't count procedure linkage table relocs in the |
| 6262 | overall reloc count. */ |
| 6263 | if (htab->srelplt != NULL) |
| 6264 | dyn.d_un.d_val -= htab->srelplt->_raw_size; |
| 6265 | break; |
| 6266 | } |
| 6267 | |
| 6268 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6269 | } |
| 6270 | } |
| 6271 | |
| 6272 | if (htab->sgot != NULL && htab->sgot->_raw_size != 0) |
| 6273 | { |
| 6274 | /* Fill in the first entry in the global offset table. |
| 6275 | We use it to hold the link-time TOCbase. */ |
| 6276 | bfd_put_64 (output_bfd, |
| 6277 | elf_gp (output_bfd) + TOC_BASE_OFF, |
| 6278 | htab->sgot->contents); |
| 6279 | |
| 6280 | /* Set .got entry size. */ |
| 6281 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8; |
| 6282 | } |
| 6283 | |
| 6284 | if (htab->splt != NULL && htab->splt->_raw_size != 0) |
| 6285 | { |
| 6286 | /* Set .plt entry size. */ |
| 6287 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize |
| 6288 | = PLT_ENTRY_SIZE; |
| 6289 | } |
| 6290 | |
| 6291 | return TRUE; |
| 6292 | } |
| 6293 | |
| 6294 | #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec |
| 6295 | #define TARGET_LITTLE_NAME "elf64-powerpcle" |
| 6296 | #define TARGET_BIG_SYM bfd_elf64_powerpc_vec |
| 6297 | #define TARGET_BIG_NAME "elf64-powerpc" |
| 6298 | #define ELF_ARCH bfd_arch_powerpc |
| 6299 | #define ELF_MACHINE_CODE EM_PPC64 |
| 6300 | #define ELF_MAXPAGESIZE 0x10000 |
| 6301 | #define elf_info_to_howto ppc64_elf_info_to_howto |
| 6302 | |
| 6303 | #ifdef EM_CYGNUS_POWERPC |
| 6304 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 6305 | #endif |
| 6306 | |
| 6307 | #ifdef EM_PPC_OLD |
| 6308 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 6309 | #endif |
| 6310 | |
| 6311 | #define elf_backend_want_got_sym 0 |
| 6312 | #define elf_backend_want_plt_sym 0 |
| 6313 | #define elf_backend_plt_alignment 3 |
| 6314 | #define elf_backend_plt_not_loaded 1 |
| 6315 | #define elf_backend_got_symbol_offset 0 |
| 6316 | #define elf_backend_got_header_size 8 |
| 6317 | #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE |
| 6318 | #define elf_backend_can_gc_sections 1 |
| 6319 | #define elf_backend_can_refcount 1 |
| 6320 | #define elf_backend_rela_normal 1 |
| 6321 | |
| 6322 | #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
| 6323 | #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
| 6324 | #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create |
| 6325 | #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free |
| 6326 | |
| 6327 | #define elf_backend_object_p ppc64_elf_object_p |
| 6328 | #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections |
| 6329 | #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol |
| 6330 | #define elf_backend_check_relocs ppc64_elf_check_relocs |
| 6331 | #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook |
| 6332 | #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook |
| 6333 | #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol |
| 6334 | #define elf_backend_hide_symbol ppc64_elf_hide_symbol |
| 6335 | #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust |
| 6336 | #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections |
| 6337 | #define elf_backend_relocate_section ppc64_elf_relocate_section |
| 6338 | #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol |
| 6339 | #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class |
| 6340 | #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections |
| 6341 | |
| 6342 | #include "elf64-target.h" |