| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright (C) 1994-2015 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the |
| 19 | Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | |
| 23 | /* This file is based on a preliminary PowerPC ELF ABI. The |
| 24 | information may not match the final PowerPC ELF ABI. It includes |
| 25 | suggestions from the in-progress Embedded PowerPC ABI, and that |
| 26 | information may also not match. */ |
| 27 | |
| 28 | #include "sysdep.h" |
| 29 | #include <stdarg.h> |
| 30 | #include "bfd.h" |
| 31 | #include "bfdlink.h" |
| 32 | #include "libbfd.h" |
| 33 | #include "elf-bfd.h" |
| 34 | #include "elf/ppc.h" |
| 35 | #include "elf32-ppc.h" |
| 36 | #include "elf-vxworks.h" |
| 37 | #include "dwarf2.h" |
| 38 | #include "elf-linux-psinfo.h" |
| 39 | |
| 40 | typedef enum split16_format_type |
| 41 | { |
| 42 | split16a_type = 0, |
| 43 | split16d_type |
| 44 | } |
| 45 | split16_format_type; |
| 46 | |
| 47 | /* RELA relocations are used here. */ |
| 48 | |
| 49 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 50 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 51 | static bfd_reloc_status_type ppc_elf_unhandled_reloc |
| 52 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 53 | |
| 54 | /* Branch prediction bit for branch taken relocs. */ |
| 55 | #define BRANCH_PREDICT_BIT 0x200000 |
| 56 | /* Mask to set RA in memory instructions. */ |
| 57 | #define RA_REGISTER_MASK 0x001f0000 |
| 58 | /* Value to shift register by to insert RA. */ |
| 59 | #define RA_REGISTER_SHIFT 16 |
| 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 | /* For old-style PLT. */ |
| 66 | /* The number of single-slot PLT entries (the rest use two slots). */ |
| 67 | #define PLT_NUM_SINGLE_ENTRIES 8192 |
| 68 | |
| 69 | /* For new-style .glink and .plt. */ |
| 70 | #define GLINK_PLTRESOLVE 16*4 |
| 71 | #define GLINK_ENTRY_SIZE 4*4 |
| 72 | #define TLS_GET_ADDR_GLINK_SIZE 12*4 |
| 73 | |
| 74 | /* VxWorks uses its own plt layout, filled in by the static linker. */ |
| 75 | |
| 76 | /* The standard VxWorks PLT entry. */ |
| 77 | #define VXWORKS_PLT_ENTRY_SIZE 32 |
| 78 | static const bfd_vma ppc_elf_vxworks_plt_entry |
| 79 | [VXWORKS_PLT_ENTRY_SIZE / 4] = |
| 80 | { |
| 81 | 0x3d800000, /* lis r12,0 */ |
| 82 | 0x818c0000, /* lwz r12,0(r12) */ |
| 83 | 0x7d8903a6, /* mtctr r12 */ |
| 84 | 0x4e800420, /* bctr */ |
| 85 | 0x39600000, /* li r11,0 */ |
| 86 | 0x48000000, /* b 14 <.PLT0resolve+0x4> */ |
| 87 | 0x60000000, /* nop */ |
| 88 | 0x60000000, /* nop */ |
| 89 | }; |
| 90 | static const bfd_vma ppc_elf_vxworks_pic_plt_entry |
| 91 | [VXWORKS_PLT_ENTRY_SIZE / 4] = |
| 92 | { |
| 93 | 0x3d9e0000, /* addis r12,r30,0 */ |
| 94 | 0x818c0000, /* lwz r12,0(r12) */ |
| 95 | 0x7d8903a6, /* mtctr r12 */ |
| 96 | 0x4e800420, /* bctr */ |
| 97 | 0x39600000, /* li r11,0 */ |
| 98 | 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ |
| 99 | 0x60000000, /* nop */ |
| 100 | 0x60000000, /* nop */ |
| 101 | }; |
| 102 | |
| 103 | /* The initial VxWorks PLT entry. */ |
| 104 | #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 |
| 105 | static const bfd_vma ppc_elf_vxworks_plt0_entry |
| 106 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = |
| 107 | { |
| 108 | 0x3d800000, /* lis r12,0 */ |
| 109 | 0x398c0000, /* addi r12,r12,0 */ |
| 110 | 0x800c0008, /* lwz r0,8(r12) */ |
| 111 | 0x7c0903a6, /* mtctr r0 */ |
| 112 | 0x818c0004, /* lwz r12,4(r12) */ |
| 113 | 0x4e800420, /* bctr */ |
| 114 | 0x60000000, /* nop */ |
| 115 | 0x60000000, /* nop */ |
| 116 | }; |
| 117 | static const bfd_vma ppc_elf_vxworks_pic_plt0_entry |
| 118 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = |
| 119 | { |
| 120 | 0x819e0008, /* lwz r12,8(r30) */ |
| 121 | 0x7d8903a6, /* mtctr r12 */ |
| 122 | 0x819e0004, /* lwz r12,4(r30) */ |
| 123 | 0x4e800420, /* bctr */ |
| 124 | 0x60000000, /* nop */ |
| 125 | 0x60000000, /* nop */ |
| 126 | 0x60000000, /* nop */ |
| 127 | 0x60000000, /* nop */ |
| 128 | }; |
| 129 | |
| 130 | /* For executables, we have some additional relocations in |
| 131 | .rela.plt.unloaded, for the kernel loader. */ |
| 132 | |
| 133 | /* The number of non-JMP_SLOT relocations per PLT0 slot. */ |
| 134 | #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 |
| 135 | /* The number of relocations in the PLTResolve slot. */ |
| 136 | #define VXWORKS_PLTRESOLVE_RELOCS 2 |
| 137 | /* The number of relocations in the PLTResolve slot when when creating |
| 138 | a shared library. */ |
| 139 | #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 |
| 140 | |
| 141 | /* Some instructions. */ |
| 142 | #define ADDIS_11_11 0x3d6b0000 |
| 143 | #define ADDIS_11_30 0x3d7e0000 |
| 144 | #define ADDIS_12_12 0x3d8c0000 |
| 145 | #define ADDI_11_11 0x396b0000 |
| 146 | #define ADD_0_11_11 0x7c0b5a14 |
| 147 | #define ADD_3_12_2 0x7c6c1214 |
| 148 | #define ADD_11_0_11 0x7d605a14 |
| 149 | #define B 0x48000000 |
| 150 | #define BA 0x48000002 |
| 151 | #define BCL_20_31 0x429f0005 |
| 152 | #define BCTR 0x4e800420 |
| 153 | #define BEQLR 0x4d820020 |
| 154 | #define CMPWI_11_0 0x2c0b0000 |
| 155 | #define LIS_11 0x3d600000 |
| 156 | #define LIS_12 0x3d800000 |
| 157 | #define LWZU_0_12 0x840c0000 |
| 158 | #define LWZ_0_12 0x800c0000 |
| 159 | #define LWZ_11_3 0x81630000 |
| 160 | #define LWZ_11_11 0x816b0000 |
| 161 | #define LWZ_11_30 0x817e0000 |
| 162 | #define LWZ_12_3 0x81830000 |
| 163 | #define LWZ_12_12 0x818c0000 |
| 164 | #define MR_0_3 0x7c601b78 |
| 165 | #define MR_3_0 0x7c030378 |
| 166 | #define MFLR_0 0x7c0802a6 |
| 167 | #define MFLR_12 0x7d8802a6 |
| 168 | #define MTCTR_0 0x7c0903a6 |
| 169 | #define MTCTR_11 0x7d6903a6 |
| 170 | #define MTLR_0 0x7c0803a6 |
| 171 | #define NOP 0x60000000 |
| 172 | #define SUB_11_11_12 0x7d6c5850 |
| 173 | |
| 174 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 175 | #define TP_OFFSET 0x7000 |
| 176 | #define DTP_OFFSET 0x8000 |
| 177 | |
| 178 | /* The value of a defined global symbol. */ |
| 179 | #define SYM_VAL(SYM) \ |
| 180 | ((SYM)->root.u.def.section->output_section->vma \ |
| 181 | + (SYM)->root.u.def.section->output_offset \ |
| 182 | + (SYM)->root.u.def.value) |
| 183 | \f |
| 184 | static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; |
| 185 | |
| 186 | static reloc_howto_type ppc_elf_howto_raw[] = { |
| 187 | /* This reloc does nothing. */ |
| 188 | HOWTO (R_PPC_NONE, /* type */ |
| 189 | 0, /* rightshift */ |
| 190 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 191 | 0, /* bitsize */ |
| 192 | FALSE, /* pc_relative */ |
| 193 | 0, /* bitpos */ |
| 194 | complain_overflow_dont, /* complain_on_overflow */ |
| 195 | bfd_elf_generic_reloc, /* special_function */ |
| 196 | "R_PPC_NONE", /* name */ |
| 197 | FALSE, /* partial_inplace */ |
| 198 | 0, /* src_mask */ |
| 199 | 0, /* dst_mask */ |
| 200 | FALSE), /* pcrel_offset */ |
| 201 | |
| 202 | /* A standard 32 bit relocation. */ |
| 203 | HOWTO (R_PPC_ADDR32, /* type */ |
| 204 | 0, /* rightshift */ |
| 205 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 206 | 32, /* bitsize */ |
| 207 | FALSE, /* pc_relative */ |
| 208 | 0, /* bitpos */ |
| 209 | complain_overflow_dont, /* complain_on_overflow */ |
| 210 | bfd_elf_generic_reloc, /* special_function */ |
| 211 | "R_PPC_ADDR32", /* name */ |
| 212 | FALSE, /* partial_inplace */ |
| 213 | 0, /* src_mask */ |
| 214 | 0xffffffff, /* dst_mask */ |
| 215 | FALSE), /* pcrel_offset */ |
| 216 | |
| 217 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 218 | FIXME: we don't check that, we just clear them. */ |
| 219 | HOWTO (R_PPC_ADDR24, /* type */ |
| 220 | 0, /* rightshift */ |
| 221 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 222 | 26, /* bitsize */ |
| 223 | FALSE, /* pc_relative */ |
| 224 | 0, /* bitpos */ |
| 225 | complain_overflow_signed, /* complain_on_overflow */ |
| 226 | bfd_elf_generic_reloc, /* special_function */ |
| 227 | "R_PPC_ADDR24", /* name */ |
| 228 | FALSE, /* partial_inplace */ |
| 229 | 0, /* src_mask */ |
| 230 | 0x3fffffc, /* dst_mask */ |
| 231 | FALSE), /* pcrel_offset */ |
| 232 | |
| 233 | /* A standard 16 bit relocation. */ |
| 234 | HOWTO (R_PPC_ADDR16, /* type */ |
| 235 | 0, /* rightshift */ |
| 236 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 237 | 16, /* bitsize */ |
| 238 | FALSE, /* pc_relative */ |
| 239 | 0, /* bitpos */ |
| 240 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 241 | bfd_elf_generic_reloc, /* special_function */ |
| 242 | "R_PPC_ADDR16", /* name */ |
| 243 | FALSE, /* partial_inplace */ |
| 244 | 0, /* src_mask */ |
| 245 | 0xffff, /* dst_mask */ |
| 246 | FALSE), /* pcrel_offset */ |
| 247 | |
| 248 | /* A 16 bit relocation without overflow. */ |
| 249 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 250 | 0, /* rightshift */ |
| 251 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 252 | 16, /* bitsize */ |
| 253 | FALSE, /* pc_relative */ |
| 254 | 0, /* bitpos */ |
| 255 | complain_overflow_dont,/* complain_on_overflow */ |
| 256 | bfd_elf_generic_reloc, /* special_function */ |
| 257 | "R_PPC_ADDR16_LO", /* name */ |
| 258 | FALSE, /* partial_inplace */ |
| 259 | 0, /* src_mask */ |
| 260 | 0xffff, /* dst_mask */ |
| 261 | FALSE), /* pcrel_offset */ |
| 262 | |
| 263 | /* The high order 16 bits of an address. */ |
| 264 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 265 | 16, /* rightshift */ |
| 266 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 267 | 16, /* bitsize */ |
| 268 | FALSE, /* pc_relative */ |
| 269 | 0, /* bitpos */ |
| 270 | complain_overflow_dont, /* complain_on_overflow */ |
| 271 | bfd_elf_generic_reloc, /* special_function */ |
| 272 | "R_PPC_ADDR16_HI", /* name */ |
| 273 | FALSE, /* partial_inplace */ |
| 274 | 0, /* src_mask */ |
| 275 | 0xffff, /* dst_mask */ |
| 276 | FALSE), /* pcrel_offset */ |
| 277 | |
| 278 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 279 | the low 16 bits, treated as a signed number, is negative. */ |
| 280 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 281 | 16, /* rightshift */ |
| 282 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 283 | 16, /* bitsize */ |
| 284 | FALSE, /* pc_relative */ |
| 285 | 0, /* bitpos */ |
| 286 | complain_overflow_dont, /* complain_on_overflow */ |
| 287 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 288 | "R_PPC_ADDR16_HA", /* name */ |
| 289 | FALSE, /* partial_inplace */ |
| 290 | 0, /* src_mask */ |
| 291 | 0xffff, /* dst_mask */ |
| 292 | FALSE), /* pcrel_offset */ |
| 293 | |
| 294 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 295 | FIXME: we don't check that, we just clear them. */ |
| 296 | HOWTO (R_PPC_ADDR14, /* type */ |
| 297 | 0, /* rightshift */ |
| 298 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 299 | 16, /* bitsize */ |
| 300 | FALSE, /* pc_relative */ |
| 301 | 0, /* bitpos */ |
| 302 | complain_overflow_signed, /* complain_on_overflow */ |
| 303 | bfd_elf_generic_reloc, /* special_function */ |
| 304 | "R_PPC_ADDR14", /* name */ |
| 305 | FALSE, /* partial_inplace */ |
| 306 | 0, /* src_mask */ |
| 307 | 0xfffc, /* dst_mask */ |
| 308 | FALSE), /* pcrel_offset */ |
| 309 | |
| 310 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 311 | indicate that the branch is expected to be taken. The lower two |
| 312 | bits must be zero. */ |
| 313 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 314 | 0, /* rightshift */ |
| 315 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 316 | 16, /* bitsize */ |
| 317 | FALSE, /* pc_relative */ |
| 318 | 0, /* bitpos */ |
| 319 | complain_overflow_signed, /* complain_on_overflow */ |
| 320 | bfd_elf_generic_reloc, /* special_function */ |
| 321 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 322 | FALSE, /* partial_inplace */ |
| 323 | 0, /* src_mask */ |
| 324 | 0xfffc, /* dst_mask */ |
| 325 | FALSE), /* pcrel_offset */ |
| 326 | |
| 327 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 328 | indicate that the branch is not expected to be taken. The lower |
| 329 | two bits must be zero. */ |
| 330 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 331 | 0, /* rightshift */ |
| 332 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 333 | 16, /* bitsize */ |
| 334 | FALSE, /* pc_relative */ |
| 335 | 0, /* bitpos */ |
| 336 | complain_overflow_signed, /* complain_on_overflow */ |
| 337 | bfd_elf_generic_reloc, /* special_function */ |
| 338 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 339 | FALSE, /* partial_inplace */ |
| 340 | 0, /* src_mask */ |
| 341 | 0xfffc, /* dst_mask */ |
| 342 | FALSE), /* pcrel_offset */ |
| 343 | |
| 344 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 345 | HOWTO (R_PPC_REL24, /* type */ |
| 346 | 0, /* rightshift */ |
| 347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 348 | 26, /* bitsize */ |
| 349 | TRUE, /* pc_relative */ |
| 350 | 0, /* bitpos */ |
| 351 | complain_overflow_signed, /* complain_on_overflow */ |
| 352 | bfd_elf_generic_reloc, /* special_function */ |
| 353 | "R_PPC_REL24", /* name */ |
| 354 | FALSE, /* partial_inplace */ |
| 355 | 0, /* src_mask */ |
| 356 | 0x3fffffc, /* dst_mask */ |
| 357 | TRUE), /* pcrel_offset */ |
| 358 | |
| 359 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 360 | HOWTO (R_PPC_REL14, /* type */ |
| 361 | 0, /* rightshift */ |
| 362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 363 | 16, /* bitsize */ |
| 364 | TRUE, /* pc_relative */ |
| 365 | 0, /* bitpos */ |
| 366 | complain_overflow_signed, /* complain_on_overflow */ |
| 367 | bfd_elf_generic_reloc, /* special_function */ |
| 368 | "R_PPC_REL14", /* name */ |
| 369 | FALSE, /* partial_inplace */ |
| 370 | 0, /* src_mask */ |
| 371 | 0xfffc, /* dst_mask */ |
| 372 | TRUE), /* pcrel_offset */ |
| 373 | |
| 374 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 375 | the branch is expected to be taken. The lower two bits must be |
| 376 | zero. */ |
| 377 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 378 | 0, /* rightshift */ |
| 379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 380 | 16, /* bitsize */ |
| 381 | TRUE, /* pc_relative */ |
| 382 | 0, /* bitpos */ |
| 383 | complain_overflow_signed, /* complain_on_overflow */ |
| 384 | bfd_elf_generic_reloc, /* special_function */ |
| 385 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 386 | FALSE, /* partial_inplace */ |
| 387 | 0, /* src_mask */ |
| 388 | 0xfffc, /* dst_mask */ |
| 389 | TRUE), /* pcrel_offset */ |
| 390 | |
| 391 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 392 | the branch is not expected to be taken. The lower two bits must |
| 393 | be zero. */ |
| 394 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 395 | 0, /* rightshift */ |
| 396 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 397 | 16, /* bitsize */ |
| 398 | TRUE, /* pc_relative */ |
| 399 | 0, /* bitpos */ |
| 400 | complain_overflow_signed, /* complain_on_overflow */ |
| 401 | bfd_elf_generic_reloc, /* special_function */ |
| 402 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 403 | FALSE, /* partial_inplace */ |
| 404 | 0, /* src_mask */ |
| 405 | 0xfffc, /* dst_mask */ |
| 406 | TRUE), /* pcrel_offset */ |
| 407 | |
| 408 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 409 | symbol. */ |
| 410 | HOWTO (R_PPC_GOT16, /* type */ |
| 411 | 0, /* rightshift */ |
| 412 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 413 | 16, /* bitsize */ |
| 414 | FALSE, /* pc_relative */ |
| 415 | 0, /* bitpos */ |
| 416 | complain_overflow_signed, /* complain_on_overflow */ |
| 417 | bfd_elf_generic_reloc, /* special_function */ |
| 418 | "R_PPC_GOT16", /* name */ |
| 419 | FALSE, /* partial_inplace */ |
| 420 | 0, /* src_mask */ |
| 421 | 0xffff, /* dst_mask */ |
| 422 | FALSE), /* pcrel_offset */ |
| 423 | |
| 424 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 425 | the symbol. */ |
| 426 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 427 | 0, /* rightshift */ |
| 428 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 429 | 16, /* bitsize */ |
| 430 | FALSE, /* pc_relative */ |
| 431 | 0, /* bitpos */ |
| 432 | complain_overflow_dont, /* complain_on_overflow */ |
| 433 | bfd_elf_generic_reloc, /* special_function */ |
| 434 | "R_PPC_GOT16_LO", /* name */ |
| 435 | FALSE, /* partial_inplace */ |
| 436 | 0, /* src_mask */ |
| 437 | 0xffff, /* dst_mask */ |
| 438 | FALSE), /* pcrel_offset */ |
| 439 | |
| 440 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 441 | the symbol. */ |
| 442 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 443 | 16, /* rightshift */ |
| 444 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 445 | 16, /* bitsize */ |
| 446 | FALSE, /* pc_relative */ |
| 447 | 0, /* bitpos */ |
| 448 | complain_overflow_dont, /* complain_on_overflow */ |
| 449 | bfd_elf_generic_reloc, /* special_function */ |
| 450 | "R_PPC_GOT16_HI", /* name */ |
| 451 | FALSE, /* partial_inplace */ |
| 452 | 0, /* src_mask */ |
| 453 | 0xffff, /* dst_mask */ |
| 454 | FALSE), /* pcrel_offset */ |
| 455 | |
| 456 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 457 | the symbol. */ |
| 458 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 459 | 16, /* rightshift */ |
| 460 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 461 | 16, /* bitsize */ |
| 462 | FALSE, /* pc_relative */ |
| 463 | 0, /* bitpos */ |
| 464 | complain_overflow_dont, /* complain_on_overflow */ |
| 465 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 466 | "R_PPC_GOT16_HA", /* name */ |
| 467 | FALSE, /* partial_inplace */ |
| 468 | 0, /* src_mask */ |
| 469 | 0xffff, /* dst_mask */ |
| 470 | FALSE), /* pcrel_offset */ |
| 471 | |
| 472 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 473 | entry for the symbol. */ |
| 474 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 475 | 0, /* rightshift */ |
| 476 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 477 | 26, /* bitsize */ |
| 478 | TRUE, /* pc_relative */ |
| 479 | 0, /* bitpos */ |
| 480 | complain_overflow_signed, /* complain_on_overflow */ |
| 481 | bfd_elf_generic_reloc, /* special_function */ |
| 482 | "R_PPC_PLTREL24", /* name */ |
| 483 | FALSE, /* partial_inplace */ |
| 484 | 0, /* src_mask */ |
| 485 | 0x3fffffc, /* dst_mask */ |
| 486 | TRUE), /* pcrel_offset */ |
| 487 | |
| 488 | /* This is used only by the dynamic linker. The symbol should exist |
| 489 | both in the object being run and in some shared library. The |
| 490 | dynamic linker copies the data addressed by the symbol from the |
| 491 | shared library into the object, because the object being |
| 492 | run has to have the data at some particular address. */ |
| 493 | HOWTO (R_PPC_COPY, /* type */ |
| 494 | 0, /* rightshift */ |
| 495 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 496 | 32, /* bitsize */ |
| 497 | FALSE, /* pc_relative */ |
| 498 | 0, /* bitpos */ |
| 499 | complain_overflow_dont, /* complain_on_overflow */ |
| 500 | bfd_elf_generic_reloc, /* special_function */ |
| 501 | "R_PPC_COPY", /* name */ |
| 502 | FALSE, /* partial_inplace */ |
| 503 | 0, /* src_mask */ |
| 504 | 0, /* dst_mask */ |
| 505 | FALSE), /* pcrel_offset */ |
| 506 | |
| 507 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 508 | entries. */ |
| 509 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 510 | 0, /* rightshift */ |
| 511 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 512 | 32, /* bitsize */ |
| 513 | FALSE, /* pc_relative */ |
| 514 | 0, /* bitpos */ |
| 515 | complain_overflow_dont, /* complain_on_overflow */ |
| 516 | bfd_elf_generic_reloc, /* special_function */ |
| 517 | "R_PPC_GLOB_DAT", /* name */ |
| 518 | FALSE, /* partial_inplace */ |
| 519 | 0, /* src_mask */ |
| 520 | 0xffffffff, /* dst_mask */ |
| 521 | FALSE), /* pcrel_offset */ |
| 522 | |
| 523 | /* Marks a procedure linkage table entry for a symbol. */ |
| 524 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 525 | 0, /* rightshift */ |
| 526 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 527 | 32, /* bitsize */ |
| 528 | FALSE, /* pc_relative */ |
| 529 | 0, /* bitpos */ |
| 530 | complain_overflow_dont, /* complain_on_overflow */ |
| 531 | bfd_elf_generic_reloc, /* special_function */ |
| 532 | "R_PPC_JMP_SLOT", /* name */ |
| 533 | FALSE, /* partial_inplace */ |
| 534 | 0, /* src_mask */ |
| 535 | 0, /* dst_mask */ |
| 536 | FALSE), /* pcrel_offset */ |
| 537 | |
| 538 | /* Used only by the dynamic linker. When the object is run, this |
| 539 | longword is set to the load address of the object, plus the |
| 540 | addend. */ |
| 541 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 542 | 0, /* rightshift */ |
| 543 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 544 | 32, /* bitsize */ |
| 545 | FALSE, /* pc_relative */ |
| 546 | 0, /* bitpos */ |
| 547 | complain_overflow_dont, /* complain_on_overflow */ |
| 548 | bfd_elf_generic_reloc, /* special_function */ |
| 549 | "R_PPC_RELATIVE", /* name */ |
| 550 | FALSE, /* partial_inplace */ |
| 551 | 0, /* src_mask */ |
| 552 | 0xffffffff, /* dst_mask */ |
| 553 | FALSE), /* pcrel_offset */ |
| 554 | |
| 555 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 556 | object rather than the final value. Normally used for |
| 557 | _GLOBAL_OFFSET_TABLE_. */ |
| 558 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 559 | 0, /* rightshift */ |
| 560 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 561 | 26, /* bitsize */ |
| 562 | TRUE, /* pc_relative */ |
| 563 | 0, /* bitpos */ |
| 564 | complain_overflow_signed, /* complain_on_overflow */ |
| 565 | bfd_elf_generic_reloc, /* special_function */ |
| 566 | "R_PPC_LOCAL24PC", /* name */ |
| 567 | FALSE, /* partial_inplace */ |
| 568 | 0, /* src_mask */ |
| 569 | 0x3fffffc, /* dst_mask */ |
| 570 | TRUE), /* pcrel_offset */ |
| 571 | |
| 572 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 573 | HOWTO (R_PPC_UADDR32, /* type */ |
| 574 | 0, /* rightshift */ |
| 575 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 576 | 32, /* bitsize */ |
| 577 | FALSE, /* pc_relative */ |
| 578 | 0, /* bitpos */ |
| 579 | complain_overflow_dont, /* complain_on_overflow */ |
| 580 | bfd_elf_generic_reloc, /* special_function */ |
| 581 | "R_PPC_UADDR32", /* name */ |
| 582 | FALSE, /* partial_inplace */ |
| 583 | 0, /* src_mask */ |
| 584 | 0xffffffff, /* dst_mask */ |
| 585 | FALSE), /* pcrel_offset */ |
| 586 | |
| 587 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 588 | HOWTO (R_PPC_UADDR16, /* type */ |
| 589 | 0, /* rightshift */ |
| 590 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 591 | 16, /* bitsize */ |
| 592 | FALSE, /* pc_relative */ |
| 593 | 0, /* bitpos */ |
| 594 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 595 | bfd_elf_generic_reloc, /* special_function */ |
| 596 | "R_PPC_UADDR16", /* name */ |
| 597 | FALSE, /* partial_inplace */ |
| 598 | 0, /* src_mask */ |
| 599 | 0xffff, /* dst_mask */ |
| 600 | FALSE), /* pcrel_offset */ |
| 601 | |
| 602 | /* 32-bit PC relative */ |
| 603 | HOWTO (R_PPC_REL32, /* type */ |
| 604 | 0, /* rightshift */ |
| 605 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 606 | 32, /* bitsize */ |
| 607 | TRUE, /* pc_relative */ |
| 608 | 0, /* bitpos */ |
| 609 | complain_overflow_dont, /* complain_on_overflow */ |
| 610 | bfd_elf_generic_reloc, /* special_function */ |
| 611 | "R_PPC_REL32", /* name */ |
| 612 | FALSE, /* partial_inplace */ |
| 613 | 0, /* src_mask */ |
| 614 | 0xffffffff, /* dst_mask */ |
| 615 | TRUE), /* pcrel_offset */ |
| 616 | |
| 617 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 618 | FIXME: not supported. */ |
| 619 | HOWTO (R_PPC_PLT32, /* type */ |
| 620 | 0, /* rightshift */ |
| 621 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 622 | 32, /* bitsize */ |
| 623 | FALSE, /* pc_relative */ |
| 624 | 0, /* bitpos */ |
| 625 | complain_overflow_dont, /* complain_on_overflow */ |
| 626 | bfd_elf_generic_reloc, /* special_function */ |
| 627 | "R_PPC_PLT32", /* name */ |
| 628 | FALSE, /* partial_inplace */ |
| 629 | 0, /* src_mask */ |
| 630 | 0, /* dst_mask */ |
| 631 | FALSE), /* pcrel_offset */ |
| 632 | |
| 633 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 634 | FIXME: not supported. */ |
| 635 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 636 | 0, /* rightshift */ |
| 637 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 638 | 32, /* bitsize */ |
| 639 | TRUE, /* pc_relative */ |
| 640 | 0, /* bitpos */ |
| 641 | complain_overflow_dont, /* complain_on_overflow */ |
| 642 | bfd_elf_generic_reloc, /* special_function */ |
| 643 | "R_PPC_PLTREL32", /* name */ |
| 644 | FALSE, /* partial_inplace */ |
| 645 | 0, /* src_mask */ |
| 646 | 0, /* dst_mask */ |
| 647 | TRUE), /* pcrel_offset */ |
| 648 | |
| 649 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 650 | the symbol. */ |
| 651 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 652 | 0, /* rightshift */ |
| 653 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 654 | 16, /* bitsize */ |
| 655 | FALSE, /* pc_relative */ |
| 656 | 0, /* bitpos */ |
| 657 | complain_overflow_dont, /* complain_on_overflow */ |
| 658 | bfd_elf_generic_reloc, /* special_function */ |
| 659 | "R_PPC_PLT16_LO", /* name */ |
| 660 | FALSE, /* partial_inplace */ |
| 661 | 0, /* src_mask */ |
| 662 | 0xffff, /* dst_mask */ |
| 663 | FALSE), /* pcrel_offset */ |
| 664 | |
| 665 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 666 | the symbol. */ |
| 667 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 668 | 16, /* rightshift */ |
| 669 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 670 | 16, /* bitsize */ |
| 671 | FALSE, /* pc_relative */ |
| 672 | 0, /* bitpos */ |
| 673 | complain_overflow_dont, /* complain_on_overflow */ |
| 674 | bfd_elf_generic_reloc, /* special_function */ |
| 675 | "R_PPC_PLT16_HI", /* name */ |
| 676 | FALSE, /* partial_inplace */ |
| 677 | 0, /* src_mask */ |
| 678 | 0xffff, /* dst_mask */ |
| 679 | FALSE), /* pcrel_offset */ |
| 680 | |
| 681 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 682 | the symbol. */ |
| 683 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 684 | 16, /* rightshift */ |
| 685 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 686 | 16, /* bitsize */ |
| 687 | FALSE, /* pc_relative */ |
| 688 | 0, /* bitpos */ |
| 689 | complain_overflow_dont, /* complain_on_overflow */ |
| 690 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 691 | "R_PPC_PLT16_HA", /* name */ |
| 692 | FALSE, /* partial_inplace */ |
| 693 | 0, /* src_mask */ |
| 694 | 0xffff, /* dst_mask */ |
| 695 | FALSE), /* pcrel_offset */ |
| 696 | |
| 697 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 698 | small data items. */ |
| 699 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 700 | 0, /* rightshift */ |
| 701 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 702 | 16, /* bitsize */ |
| 703 | FALSE, /* pc_relative */ |
| 704 | 0, /* bitpos */ |
| 705 | complain_overflow_signed, /* complain_on_overflow */ |
| 706 | bfd_elf_generic_reloc, /* special_function */ |
| 707 | "R_PPC_SDAREL16", /* name */ |
| 708 | FALSE, /* partial_inplace */ |
| 709 | 0, /* src_mask */ |
| 710 | 0xffff, /* dst_mask */ |
| 711 | FALSE), /* pcrel_offset */ |
| 712 | |
| 713 | /* 16-bit section relative relocation. */ |
| 714 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 715 | 0, /* rightshift */ |
| 716 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 717 | 16, /* bitsize */ |
| 718 | FALSE, /* pc_relative */ |
| 719 | 0, /* bitpos */ |
| 720 | complain_overflow_signed, /* complain_on_overflow */ |
| 721 | bfd_elf_generic_reloc, /* special_function */ |
| 722 | "R_PPC_SECTOFF", /* name */ |
| 723 | FALSE, /* partial_inplace */ |
| 724 | 0, /* src_mask */ |
| 725 | 0xffff, /* dst_mask */ |
| 726 | FALSE), /* pcrel_offset */ |
| 727 | |
| 728 | /* 16-bit lower half section relative relocation. */ |
| 729 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 730 | 0, /* rightshift */ |
| 731 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 732 | 16, /* bitsize */ |
| 733 | FALSE, /* pc_relative */ |
| 734 | 0, /* bitpos */ |
| 735 | complain_overflow_dont, /* complain_on_overflow */ |
| 736 | bfd_elf_generic_reloc, /* special_function */ |
| 737 | "R_PPC_SECTOFF_LO", /* name */ |
| 738 | FALSE, /* partial_inplace */ |
| 739 | 0, /* src_mask */ |
| 740 | 0xffff, /* dst_mask */ |
| 741 | FALSE), /* pcrel_offset */ |
| 742 | |
| 743 | /* 16-bit upper half section relative relocation. */ |
| 744 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 745 | 16, /* rightshift */ |
| 746 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 747 | 16, /* bitsize */ |
| 748 | FALSE, /* pc_relative */ |
| 749 | 0, /* bitpos */ |
| 750 | complain_overflow_dont, /* complain_on_overflow */ |
| 751 | bfd_elf_generic_reloc, /* special_function */ |
| 752 | "R_PPC_SECTOFF_HI", /* name */ |
| 753 | FALSE, /* partial_inplace */ |
| 754 | 0, /* src_mask */ |
| 755 | 0xffff, /* dst_mask */ |
| 756 | FALSE), /* pcrel_offset */ |
| 757 | |
| 758 | /* 16-bit upper half adjusted section relative relocation. */ |
| 759 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 760 | 16, /* rightshift */ |
| 761 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 762 | 16, /* bitsize */ |
| 763 | FALSE, /* pc_relative */ |
| 764 | 0, /* bitpos */ |
| 765 | complain_overflow_dont, /* complain_on_overflow */ |
| 766 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 767 | "R_PPC_SECTOFF_HA", /* name */ |
| 768 | FALSE, /* partial_inplace */ |
| 769 | 0, /* src_mask */ |
| 770 | 0xffff, /* dst_mask */ |
| 771 | FALSE), /* pcrel_offset */ |
| 772 | |
| 773 | /* Marker relocs for TLS. */ |
| 774 | HOWTO (R_PPC_TLS, |
| 775 | 0, /* rightshift */ |
| 776 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 777 | 32, /* bitsize */ |
| 778 | FALSE, /* pc_relative */ |
| 779 | 0, /* bitpos */ |
| 780 | complain_overflow_dont, /* complain_on_overflow */ |
| 781 | bfd_elf_generic_reloc, /* special_function */ |
| 782 | "R_PPC_TLS", /* name */ |
| 783 | FALSE, /* partial_inplace */ |
| 784 | 0, /* src_mask */ |
| 785 | 0, /* dst_mask */ |
| 786 | FALSE), /* pcrel_offset */ |
| 787 | |
| 788 | HOWTO (R_PPC_TLSGD, |
| 789 | 0, /* rightshift */ |
| 790 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 791 | 32, /* bitsize */ |
| 792 | FALSE, /* pc_relative */ |
| 793 | 0, /* bitpos */ |
| 794 | complain_overflow_dont, /* complain_on_overflow */ |
| 795 | bfd_elf_generic_reloc, /* special_function */ |
| 796 | "R_PPC_TLSGD", /* name */ |
| 797 | FALSE, /* partial_inplace */ |
| 798 | 0, /* src_mask */ |
| 799 | 0, /* dst_mask */ |
| 800 | FALSE), /* pcrel_offset */ |
| 801 | |
| 802 | HOWTO (R_PPC_TLSLD, |
| 803 | 0, /* rightshift */ |
| 804 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 805 | 32, /* bitsize */ |
| 806 | FALSE, /* pc_relative */ |
| 807 | 0, /* bitpos */ |
| 808 | complain_overflow_dont, /* complain_on_overflow */ |
| 809 | bfd_elf_generic_reloc, /* special_function */ |
| 810 | "R_PPC_TLSLD", /* name */ |
| 811 | FALSE, /* partial_inplace */ |
| 812 | 0, /* src_mask */ |
| 813 | 0, /* dst_mask */ |
| 814 | FALSE), /* pcrel_offset */ |
| 815 | |
| 816 | /* Computes the load module index of the load module that contains the |
| 817 | definition of its TLS sym. */ |
| 818 | HOWTO (R_PPC_DTPMOD32, |
| 819 | 0, /* rightshift */ |
| 820 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 821 | 32, /* bitsize */ |
| 822 | FALSE, /* pc_relative */ |
| 823 | 0, /* bitpos */ |
| 824 | complain_overflow_dont, /* complain_on_overflow */ |
| 825 | ppc_elf_unhandled_reloc, /* special_function */ |
| 826 | "R_PPC_DTPMOD32", /* name */ |
| 827 | FALSE, /* partial_inplace */ |
| 828 | 0, /* src_mask */ |
| 829 | 0xffffffff, /* dst_mask */ |
| 830 | FALSE), /* pcrel_offset */ |
| 831 | |
| 832 | /* Computes a dtv-relative displacement, the difference between the value |
| 833 | of sym+add and the base address of the thread-local storage block that |
| 834 | contains the definition of sym, minus 0x8000. */ |
| 835 | HOWTO (R_PPC_DTPREL32, |
| 836 | 0, /* rightshift */ |
| 837 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 838 | 32, /* bitsize */ |
| 839 | FALSE, /* pc_relative */ |
| 840 | 0, /* bitpos */ |
| 841 | complain_overflow_dont, /* complain_on_overflow */ |
| 842 | ppc_elf_unhandled_reloc, /* special_function */ |
| 843 | "R_PPC_DTPREL32", /* name */ |
| 844 | FALSE, /* partial_inplace */ |
| 845 | 0, /* src_mask */ |
| 846 | 0xffffffff, /* dst_mask */ |
| 847 | FALSE), /* pcrel_offset */ |
| 848 | |
| 849 | /* A 16 bit dtprel reloc. */ |
| 850 | HOWTO (R_PPC_DTPREL16, |
| 851 | 0, /* rightshift */ |
| 852 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 853 | 16, /* bitsize */ |
| 854 | FALSE, /* pc_relative */ |
| 855 | 0, /* bitpos */ |
| 856 | complain_overflow_signed, /* complain_on_overflow */ |
| 857 | ppc_elf_unhandled_reloc, /* special_function */ |
| 858 | "R_PPC_DTPREL16", /* name */ |
| 859 | FALSE, /* partial_inplace */ |
| 860 | 0, /* src_mask */ |
| 861 | 0xffff, /* dst_mask */ |
| 862 | FALSE), /* pcrel_offset */ |
| 863 | |
| 864 | /* Like DTPREL16, but no overflow. */ |
| 865 | HOWTO (R_PPC_DTPREL16_LO, |
| 866 | 0, /* rightshift */ |
| 867 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 868 | 16, /* bitsize */ |
| 869 | FALSE, /* pc_relative */ |
| 870 | 0, /* bitpos */ |
| 871 | complain_overflow_dont, /* complain_on_overflow */ |
| 872 | ppc_elf_unhandled_reloc, /* special_function */ |
| 873 | "R_PPC_DTPREL16_LO", /* name */ |
| 874 | FALSE, /* partial_inplace */ |
| 875 | 0, /* src_mask */ |
| 876 | 0xffff, /* dst_mask */ |
| 877 | FALSE), /* pcrel_offset */ |
| 878 | |
| 879 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| 880 | HOWTO (R_PPC_DTPREL16_HI, |
| 881 | 16, /* rightshift */ |
| 882 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 883 | 16, /* bitsize */ |
| 884 | FALSE, /* pc_relative */ |
| 885 | 0, /* bitpos */ |
| 886 | complain_overflow_dont, /* complain_on_overflow */ |
| 887 | ppc_elf_unhandled_reloc, /* special_function */ |
| 888 | "R_PPC_DTPREL16_HI", /* name */ |
| 889 | FALSE, /* partial_inplace */ |
| 890 | 0, /* src_mask */ |
| 891 | 0xffff, /* dst_mask */ |
| 892 | FALSE), /* pcrel_offset */ |
| 893 | |
| 894 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| 895 | HOWTO (R_PPC_DTPREL16_HA, |
| 896 | 16, /* rightshift */ |
| 897 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 898 | 16, /* bitsize */ |
| 899 | FALSE, /* pc_relative */ |
| 900 | 0, /* bitpos */ |
| 901 | complain_overflow_dont, /* complain_on_overflow */ |
| 902 | ppc_elf_unhandled_reloc, /* special_function */ |
| 903 | "R_PPC_DTPREL16_HA", /* name */ |
| 904 | FALSE, /* partial_inplace */ |
| 905 | 0, /* src_mask */ |
| 906 | 0xffff, /* dst_mask */ |
| 907 | FALSE), /* pcrel_offset */ |
| 908 | |
| 909 | /* Computes a tp-relative displacement, the difference between the value of |
| 910 | sym+add and the value of the thread pointer (r13). */ |
| 911 | HOWTO (R_PPC_TPREL32, |
| 912 | 0, /* rightshift */ |
| 913 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 914 | 32, /* bitsize */ |
| 915 | FALSE, /* pc_relative */ |
| 916 | 0, /* bitpos */ |
| 917 | complain_overflow_dont, /* complain_on_overflow */ |
| 918 | ppc_elf_unhandled_reloc, /* special_function */ |
| 919 | "R_PPC_TPREL32", /* name */ |
| 920 | FALSE, /* partial_inplace */ |
| 921 | 0, /* src_mask */ |
| 922 | 0xffffffff, /* dst_mask */ |
| 923 | FALSE), /* pcrel_offset */ |
| 924 | |
| 925 | /* A 16 bit tprel reloc. */ |
| 926 | HOWTO (R_PPC_TPREL16, |
| 927 | 0, /* rightshift */ |
| 928 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 929 | 16, /* bitsize */ |
| 930 | FALSE, /* pc_relative */ |
| 931 | 0, /* bitpos */ |
| 932 | complain_overflow_signed, /* complain_on_overflow */ |
| 933 | ppc_elf_unhandled_reloc, /* special_function */ |
| 934 | "R_PPC_TPREL16", /* name */ |
| 935 | FALSE, /* partial_inplace */ |
| 936 | 0, /* src_mask */ |
| 937 | 0xffff, /* dst_mask */ |
| 938 | FALSE), /* pcrel_offset */ |
| 939 | |
| 940 | /* Like TPREL16, but no overflow. */ |
| 941 | HOWTO (R_PPC_TPREL16_LO, |
| 942 | 0, /* rightshift */ |
| 943 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 944 | 16, /* bitsize */ |
| 945 | FALSE, /* pc_relative */ |
| 946 | 0, /* bitpos */ |
| 947 | complain_overflow_dont, /* complain_on_overflow */ |
| 948 | ppc_elf_unhandled_reloc, /* special_function */ |
| 949 | "R_PPC_TPREL16_LO", /* name */ |
| 950 | FALSE, /* partial_inplace */ |
| 951 | 0, /* src_mask */ |
| 952 | 0xffff, /* dst_mask */ |
| 953 | FALSE), /* pcrel_offset */ |
| 954 | |
| 955 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| 956 | HOWTO (R_PPC_TPREL16_HI, |
| 957 | 16, /* rightshift */ |
| 958 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 959 | 16, /* bitsize */ |
| 960 | FALSE, /* pc_relative */ |
| 961 | 0, /* bitpos */ |
| 962 | complain_overflow_dont, /* complain_on_overflow */ |
| 963 | ppc_elf_unhandled_reloc, /* special_function */ |
| 964 | "R_PPC_TPREL16_HI", /* name */ |
| 965 | FALSE, /* partial_inplace */ |
| 966 | 0, /* src_mask */ |
| 967 | 0xffff, /* dst_mask */ |
| 968 | FALSE), /* pcrel_offset */ |
| 969 | |
| 970 | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| 971 | HOWTO (R_PPC_TPREL16_HA, |
| 972 | 16, /* rightshift */ |
| 973 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 974 | 16, /* bitsize */ |
| 975 | FALSE, /* pc_relative */ |
| 976 | 0, /* bitpos */ |
| 977 | complain_overflow_dont, /* complain_on_overflow */ |
| 978 | ppc_elf_unhandled_reloc, /* special_function */ |
| 979 | "R_PPC_TPREL16_HA", /* name */ |
| 980 | FALSE, /* partial_inplace */ |
| 981 | 0, /* src_mask */ |
| 982 | 0xffff, /* dst_mask */ |
| 983 | FALSE), /* pcrel_offset */ |
| 984 | |
| 985 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 986 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| 987 | to the first entry. */ |
| 988 | HOWTO (R_PPC_GOT_TLSGD16, |
| 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_signed, /* complain_on_overflow */ |
| 995 | ppc_elf_unhandled_reloc, /* special_function */ |
| 996 | "R_PPC_GOT_TLSGD16", /* name */ |
| 997 | FALSE, /* partial_inplace */ |
| 998 | 0, /* src_mask */ |
| 999 | 0xffff, /* dst_mask */ |
| 1000 | FALSE), /* pcrel_offset */ |
| 1001 | |
| 1002 | /* Like GOT_TLSGD16, but no overflow. */ |
| 1003 | HOWTO (R_PPC_GOT_TLSGD16_LO, |
| 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 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1011 | "R_PPC_GOT_TLSGD16_LO", /* name */ |
| 1012 | FALSE, /* partial_inplace */ |
| 1013 | 0, /* src_mask */ |
| 1014 | 0xffff, /* dst_mask */ |
| 1015 | FALSE), /* pcrel_offset */ |
| 1016 | |
| 1017 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| 1018 | HOWTO (R_PPC_GOT_TLSGD16_HI, |
| 1019 | 16, /* rightshift */ |
| 1020 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1021 | 16, /* bitsize */ |
| 1022 | FALSE, /* pc_relative */ |
| 1023 | 0, /* bitpos */ |
| 1024 | complain_overflow_dont, /* complain_on_overflow */ |
| 1025 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1026 | "R_PPC_GOT_TLSGD16_HI", /* name */ |
| 1027 | FALSE, /* partial_inplace */ |
| 1028 | 0, /* src_mask */ |
| 1029 | 0xffff, /* dst_mask */ |
| 1030 | FALSE), /* pcrel_offset */ |
| 1031 | |
| 1032 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| 1033 | HOWTO (R_PPC_GOT_TLSGD16_HA, |
| 1034 | 16, /* 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 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1041 | "R_PPC_GOT_TLSGD16_HA", /* name */ |
| 1042 | FALSE, /* partial_inplace */ |
| 1043 | 0, /* src_mask */ |
| 1044 | 0xffff, /* dst_mask */ |
| 1045 | FALSE), /* pcrel_offset */ |
| 1046 | |
| 1047 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 1048 | with values (sym+add)@dtpmod and zero, and computes the offset to the |
| 1049 | first entry. */ |
| 1050 | HOWTO (R_PPC_GOT_TLSLD16, |
| 1051 | 0, /* rightshift */ |
| 1052 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1053 | 16, /* bitsize */ |
| 1054 | FALSE, /* pc_relative */ |
| 1055 | 0, /* bitpos */ |
| 1056 | complain_overflow_signed, /* complain_on_overflow */ |
| 1057 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1058 | "R_PPC_GOT_TLSLD16", /* name */ |
| 1059 | FALSE, /* partial_inplace */ |
| 1060 | 0, /* src_mask */ |
| 1061 | 0xffff, /* dst_mask */ |
| 1062 | FALSE), /* pcrel_offset */ |
| 1063 | |
| 1064 | /* Like GOT_TLSLD16, but no overflow. */ |
| 1065 | HOWTO (R_PPC_GOT_TLSLD16_LO, |
| 1066 | 0, /* rightshift */ |
| 1067 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1068 | 16, /* bitsize */ |
| 1069 | FALSE, /* pc_relative */ |
| 1070 | 0, /* bitpos */ |
| 1071 | complain_overflow_dont, /* complain_on_overflow */ |
| 1072 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1073 | "R_PPC_GOT_TLSLD16_LO", /* name */ |
| 1074 | FALSE, /* partial_inplace */ |
| 1075 | 0, /* src_mask */ |
| 1076 | 0xffff, /* dst_mask */ |
| 1077 | FALSE), /* pcrel_offset */ |
| 1078 | |
| 1079 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| 1080 | HOWTO (R_PPC_GOT_TLSLD16_HI, |
| 1081 | 16, /* rightshift */ |
| 1082 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1083 | 16, /* bitsize */ |
| 1084 | FALSE, /* pc_relative */ |
| 1085 | 0, /* bitpos */ |
| 1086 | complain_overflow_dont, /* complain_on_overflow */ |
| 1087 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1088 | "R_PPC_GOT_TLSLD16_HI", /* name */ |
| 1089 | FALSE, /* partial_inplace */ |
| 1090 | 0, /* src_mask */ |
| 1091 | 0xffff, /* dst_mask */ |
| 1092 | FALSE), /* pcrel_offset */ |
| 1093 | |
| 1094 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| 1095 | HOWTO (R_PPC_GOT_TLSLD16_HA, |
| 1096 | 16, /* rightshift */ |
| 1097 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1098 | 16, /* bitsize */ |
| 1099 | FALSE, /* pc_relative */ |
| 1100 | 0, /* bitpos */ |
| 1101 | complain_overflow_dont, /* complain_on_overflow */ |
| 1102 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1103 | "R_PPC_GOT_TLSLD16_HA", /* name */ |
| 1104 | FALSE, /* partial_inplace */ |
| 1105 | 0, /* src_mask */ |
| 1106 | 0xffff, /* dst_mask */ |
| 1107 | FALSE), /* pcrel_offset */ |
| 1108 | |
| 1109 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| 1110 | the offset to the entry. */ |
| 1111 | HOWTO (R_PPC_GOT_DTPREL16, |
| 1112 | 0, /* rightshift */ |
| 1113 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1114 | 16, /* bitsize */ |
| 1115 | FALSE, /* pc_relative */ |
| 1116 | 0, /* bitpos */ |
| 1117 | complain_overflow_signed, /* complain_on_overflow */ |
| 1118 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1119 | "R_PPC_GOT_DTPREL16", /* name */ |
| 1120 | FALSE, /* partial_inplace */ |
| 1121 | 0, /* src_mask */ |
| 1122 | 0xffff, /* dst_mask */ |
| 1123 | FALSE), /* pcrel_offset */ |
| 1124 | |
| 1125 | /* Like GOT_DTPREL16, but no overflow. */ |
| 1126 | HOWTO (R_PPC_GOT_DTPREL16_LO, |
| 1127 | 0, /* rightshift */ |
| 1128 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1129 | 16, /* bitsize */ |
| 1130 | FALSE, /* pc_relative */ |
| 1131 | 0, /* bitpos */ |
| 1132 | complain_overflow_dont, /* complain_on_overflow */ |
| 1133 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1134 | "R_PPC_GOT_DTPREL16_LO", /* name */ |
| 1135 | FALSE, /* partial_inplace */ |
| 1136 | 0, /* src_mask */ |
| 1137 | 0xffff, /* dst_mask */ |
| 1138 | FALSE), /* pcrel_offset */ |
| 1139 | |
| 1140 | /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ |
| 1141 | HOWTO (R_PPC_GOT_DTPREL16_HI, |
| 1142 | 16, /* rightshift */ |
| 1143 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1144 | 16, /* bitsize */ |
| 1145 | FALSE, /* pc_relative */ |
| 1146 | 0, /* bitpos */ |
| 1147 | complain_overflow_dont, /* complain_on_overflow */ |
| 1148 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1149 | "R_PPC_GOT_DTPREL16_HI", /* name */ |
| 1150 | FALSE, /* partial_inplace */ |
| 1151 | 0, /* src_mask */ |
| 1152 | 0xffff, /* dst_mask */ |
| 1153 | FALSE), /* pcrel_offset */ |
| 1154 | |
| 1155 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| 1156 | HOWTO (R_PPC_GOT_DTPREL16_HA, |
| 1157 | 16, /* rightshift */ |
| 1158 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1159 | 16, /* bitsize */ |
| 1160 | FALSE, /* pc_relative */ |
| 1161 | 0, /* bitpos */ |
| 1162 | complain_overflow_dont, /* complain_on_overflow */ |
| 1163 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1164 | "R_PPC_GOT_DTPREL16_HA", /* name */ |
| 1165 | FALSE, /* partial_inplace */ |
| 1166 | 0, /* src_mask */ |
| 1167 | 0xffff, /* dst_mask */ |
| 1168 | FALSE), /* pcrel_offset */ |
| 1169 | |
| 1170 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| 1171 | offset to the entry. */ |
| 1172 | HOWTO (R_PPC_GOT_TPREL16, |
| 1173 | 0, /* rightshift */ |
| 1174 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1175 | 16, /* bitsize */ |
| 1176 | FALSE, /* pc_relative */ |
| 1177 | 0, /* bitpos */ |
| 1178 | complain_overflow_signed, /* complain_on_overflow */ |
| 1179 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1180 | "R_PPC_GOT_TPREL16", /* name */ |
| 1181 | FALSE, /* partial_inplace */ |
| 1182 | 0, /* src_mask */ |
| 1183 | 0xffff, /* dst_mask */ |
| 1184 | FALSE), /* pcrel_offset */ |
| 1185 | |
| 1186 | /* Like GOT_TPREL16, but no overflow. */ |
| 1187 | HOWTO (R_PPC_GOT_TPREL16_LO, |
| 1188 | 0, /* rightshift */ |
| 1189 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1190 | 16, /* bitsize */ |
| 1191 | FALSE, /* pc_relative */ |
| 1192 | 0, /* bitpos */ |
| 1193 | complain_overflow_dont, /* complain_on_overflow */ |
| 1194 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1195 | "R_PPC_GOT_TPREL16_LO", /* name */ |
| 1196 | FALSE, /* partial_inplace */ |
| 1197 | 0, /* src_mask */ |
| 1198 | 0xffff, /* dst_mask */ |
| 1199 | FALSE), /* pcrel_offset */ |
| 1200 | |
| 1201 | /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ |
| 1202 | HOWTO (R_PPC_GOT_TPREL16_HI, |
| 1203 | 16, /* rightshift */ |
| 1204 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1205 | 16, /* bitsize */ |
| 1206 | FALSE, /* pc_relative */ |
| 1207 | 0, /* bitpos */ |
| 1208 | complain_overflow_dont, /* complain_on_overflow */ |
| 1209 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1210 | "R_PPC_GOT_TPREL16_HI", /* name */ |
| 1211 | FALSE, /* partial_inplace */ |
| 1212 | 0, /* src_mask */ |
| 1213 | 0xffff, /* dst_mask */ |
| 1214 | FALSE), /* pcrel_offset */ |
| 1215 | |
| 1216 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| 1217 | HOWTO (R_PPC_GOT_TPREL16_HA, |
| 1218 | 16, /* rightshift */ |
| 1219 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1220 | 16, /* bitsize */ |
| 1221 | FALSE, /* pc_relative */ |
| 1222 | 0, /* bitpos */ |
| 1223 | complain_overflow_dont, /* complain_on_overflow */ |
| 1224 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1225 | "R_PPC_GOT_TPREL16_HA", /* name */ |
| 1226 | FALSE, /* partial_inplace */ |
| 1227 | 0, /* src_mask */ |
| 1228 | 0xffff, /* dst_mask */ |
| 1229 | FALSE), /* pcrel_offset */ |
| 1230 | |
| 1231 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 1232 | in the SVR4 ELF ABI. */ |
| 1233 | |
| 1234 | /* 32 bit value resulting from the addend minus the symbol. */ |
| 1235 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 1236 | 0, /* rightshift */ |
| 1237 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1238 | 32, /* bitsize */ |
| 1239 | FALSE, /* pc_relative */ |
| 1240 | 0, /* bitpos */ |
| 1241 | complain_overflow_dont, /* complain_on_overflow */ |
| 1242 | bfd_elf_generic_reloc, /* special_function */ |
| 1243 | "R_PPC_EMB_NADDR32", /* name */ |
| 1244 | FALSE, /* partial_inplace */ |
| 1245 | 0, /* src_mask */ |
| 1246 | 0xffffffff, /* dst_mask */ |
| 1247 | FALSE), /* pcrel_offset */ |
| 1248 | |
| 1249 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1250 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 1251 | 0, /* rightshift */ |
| 1252 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1253 | 16, /* bitsize */ |
| 1254 | FALSE, /* pc_relative */ |
| 1255 | 0, /* bitpos */ |
| 1256 | complain_overflow_signed, /* complain_on_overflow */ |
| 1257 | bfd_elf_generic_reloc, /* special_function */ |
| 1258 | "R_PPC_EMB_NADDR16", /* name */ |
| 1259 | FALSE, /* partial_inplace */ |
| 1260 | 0, /* src_mask */ |
| 1261 | 0xffff, /* dst_mask */ |
| 1262 | FALSE), /* pcrel_offset */ |
| 1263 | |
| 1264 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1265 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 1266 | 0, /* rightshift */ |
| 1267 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1268 | 16, /* bitsize */ |
| 1269 | FALSE, /* pc_relative */ |
| 1270 | 0, /* bitpos */ |
| 1271 | complain_overflow_dont,/* complain_on_overflow */ |
| 1272 | bfd_elf_generic_reloc, /* special_function */ |
| 1273 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 1274 | FALSE, /* partial_inplace */ |
| 1275 | 0, /* src_mask */ |
| 1276 | 0xffff, /* dst_mask */ |
| 1277 | FALSE), /* pcrel_offset */ |
| 1278 | |
| 1279 | /* The high order 16 bits of the addend minus the symbol. */ |
| 1280 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 1281 | 16, /* rightshift */ |
| 1282 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1283 | 16, /* bitsize */ |
| 1284 | FALSE, /* pc_relative */ |
| 1285 | 0, /* bitpos */ |
| 1286 | complain_overflow_dont, /* complain_on_overflow */ |
| 1287 | bfd_elf_generic_reloc, /* special_function */ |
| 1288 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 1289 | FALSE, /* partial_inplace */ |
| 1290 | 0, /* src_mask */ |
| 1291 | 0xffff, /* dst_mask */ |
| 1292 | FALSE), /* pcrel_offset */ |
| 1293 | |
| 1294 | /* The high order 16 bits of the result of the addend minus the address, |
| 1295 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 1296 | is negative. */ |
| 1297 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 1298 | 16, /* rightshift */ |
| 1299 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1300 | 16, /* bitsize */ |
| 1301 | FALSE, /* pc_relative */ |
| 1302 | 0, /* bitpos */ |
| 1303 | complain_overflow_dont, /* complain_on_overflow */ |
| 1304 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1305 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 1306 | FALSE, /* partial_inplace */ |
| 1307 | 0, /* src_mask */ |
| 1308 | 0xffff, /* dst_mask */ |
| 1309 | FALSE), /* pcrel_offset */ |
| 1310 | |
| 1311 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1312 | address in the .sdata section, and returning the offset from |
| 1313 | _SDA_BASE_ for that relocation. */ |
| 1314 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 1315 | 0, /* rightshift */ |
| 1316 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1317 | 16, /* bitsize */ |
| 1318 | FALSE, /* pc_relative */ |
| 1319 | 0, /* bitpos */ |
| 1320 | complain_overflow_signed, /* complain_on_overflow */ |
| 1321 | bfd_elf_generic_reloc, /* special_function */ |
| 1322 | "R_PPC_EMB_SDAI16", /* name */ |
| 1323 | FALSE, /* partial_inplace */ |
| 1324 | 0, /* src_mask */ |
| 1325 | 0xffff, /* dst_mask */ |
| 1326 | FALSE), /* pcrel_offset */ |
| 1327 | |
| 1328 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1329 | address in the .sdata2 section, and returning the offset from |
| 1330 | _SDA2_BASE_ for that relocation. */ |
| 1331 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 1332 | 0, /* rightshift */ |
| 1333 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1334 | 16, /* bitsize */ |
| 1335 | FALSE, /* pc_relative */ |
| 1336 | 0, /* bitpos */ |
| 1337 | complain_overflow_signed, /* complain_on_overflow */ |
| 1338 | bfd_elf_generic_reloc, /* special_function */ |
| 1339 | "R_PPC_EMB_SDA2I16", /* name */ |
| 1340 | FALSE, /* partial_inplace */ |
| 1341 | 0, /* src_mask */ |
| 1342 | 0xffff, /* dst_mask */ |
| 1343 | FALSE), /* pcrel_offset */ |
| 1344 | |
| 1345 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 1346 | small data items. */ |
| 1347 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 1348 | 0, /* rightshift */ |
| 1349 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1350 | 16, /* bitsize */ |
| 1351 | FALSE, /* pc_relative */ |
| 1352 | 0, /* bitpos */ |
| 1353 | complain_overflow_signed, /* complain_on_overflow */ |
| 1354 | bfd_elf_generic_reloc, /* special_function */ |
| 1355 | "R_PPC_EMB_SDA2REL", /* name */ |
| 1356 | FALSE, /* partial_inplace */ |
| 1357 | 0, /* src_mask */ |
| 1358 | 0xffff, /* dst_mask */ |
| 1359 | FALSE), /* pcrel_offset */ |
| 1360 | |
| 1361 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 1362 | signed offset from the appropriate base, and filling in the register |
| 1363 | field with the appropriate register (0, 2, or 13). */ |
| 1364 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 1365 | 0, /* rightshift */ |
| 1366 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1367 | 16, /* bitsize */ |
| 1368 | FALSE, /* pc_relative */ |
| 1369 | 0, /* bitpos */ |
| 1370 | complain_overflow_signed, /* complain_on_overflow */ |
| 1371 | bfd_elf_generic_reloc, /* special_function */ |
| 1372 | "R_PPC_EMB_SDA21", /* name */ |
| 1373 | FALSE, /* partial_inplace */ |
| 1374 | 0, /* src_mask */ |
| 1375 | 0xffff, /* dst_mask */ |
| 1376 | FALSE), /* pcrel_offset */ |
| 1377 | |
| 1378 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 1379 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 1380 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 1381 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 1382 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 1383 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 1384 | |
| 1385 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 1386 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 1387 | register field with the appropriate register (0, 2, or 13). */ |
| 1388 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 1389 | 0, /* rightshift */ |
| 1390 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1391 | 16, /* bitsize */ |
| 1392 | FALSE, /* pc_relative */ |
| 1393 | 0, /* bitpos */ |
| 1394 | complain_overflow_signed, /* complain_on_overflow */ |
| 1395 | bfd_elf_generic_reloc, /* special_function */ |
| 1396 | "R_PPC_EMB_RELSDA", /* name */ |
| 1397 | FALSE, /* partial_inplace */ |
| 1398 | 0, /* src_mask */ |
| 1399 | 0xffff, /* dst_mask */ |
| 1400 | FALSE), /* pcrel_offset */ |
| 1401 | |
| 1402 | /* A relative 8 bit branch. */ |
| 1403 | HOWTO (R_PPC_VLE_REL8, /* type */ |
| 1404 | 1, /* rightshift */ |
| 1405 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1406 | 8, /* bitsize */ |
| 1407 | TRUE, /* pc_relative */ |
| 1408 | 0, /* bitpos */ |
| 1409 | complain_overflow_signed, /* complain_on_overflow */ |
| 1410 | bfd_elf_generic_reloc, /* special_function */ |
| 1411 | "R_PPC_VLE_REL8", /* name */ |
| 1412 | FALSE, /* partial_inplace */ |
| 1413 | 0, /* src_mask */ |
| 1414 | 0xff, /* dst_mask */ |
| 1415 | TRUE), /* pcrel_offset */ |
| 1416 | |
| 1417 | /* A relative 15 bit branch. */ |
| 1418 | HOWTO (R_PPC_VLE_REL15, /* type */ |
| 1419 | 1, /* rightshift */ |
| 1420 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1421 | 15, /* bitsize */ |
| 1422 | TRUE, /* pc_relative */ |
| 1423 | 1, /* bitpos */ |
| 1424 | complain_overflow_signed, /* complain_on_overflow */ |
| 1425 | bfd_elf_generic_reloc, /* special_function */ |
| 1426 | "R_PPC_VLE_REL15", /* name */ |
| 1427 | FALSE, /* partial_inplace */ |
| 1428 | 0, /* src_mask */ |
| 1429 | 0xfe, /* dst_mask */ |
| 1430 | TRUE), /* pcrel_offset */ |
| 1431 | |
| 1432 | /* A relative 24 bit branch. */ |
| 1433 | HOWTO (R_PPC_VLE_REL24, /* type */ |
| 1434 | 1, /* rightshift */ |
| 1435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1436 | 24, /* bitsize */ |
| 1437 | TRUE, /* pc_relative */ |
| 1438 | 1, /* bitpos */ |
| 1439 | complain_overflow_signed, /* complain_on_overflow */ |
| 1440 | bfd_elf_generic_reloc, /* special_function */ |
| 1441 | "R_PPC_VLE_REL24", /* name */ |
| 1442 | FALSE, /* partial_inplace */ |
| 1443 | 0, /* src_mask */ |
| 1444 | 0x1fffffe, /* dst_mask */ |
| 1445 | TRUE), /* pcrel_offset */ |
| 1446 | |
| 1447 | /* The 16 LSBS in split16a format. */ |
| 1448 | HOWTO (R_PPC_VLE_LO16A, /* type */ |
| 1449 | 0, /* rightshift */ |
| 1450 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1451 | 16, /* bitsize */ |
| 1452 | FALSE, /* pc_relative */ |
| 1453 | 0, /* bitpos */ |
| 1454 | complain_overflow_dont, /* complain_on_overflow */ |
| 1455 | bfd_elf_generic_reloc, /* special_function */ |
| 1456 | "R_PPC_VLE_LO16A", /* name */ |
| 1457 | FALSE, /* partial_inplace */ |
| 1458 | 0, /* src_mask */ |
| 1459 | 0x1f007ff, /* dst_mask */ |
| 1460 | FALSE), /* pcrel_offset */ |
| 1461 | |
| 1462 | /* The 16 LSBS in split16d format. */ |
| 1463 | HOWTO (R_PPC_VLE_LO16D, /* type */ |
| 1464 | 0, /* rightshift */ |
| 1465 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1466 | 16, /* bitsize */ |
| 1467 | FALSE, /* pc_relative */ |
| 1468 | 0, /* bitpos */ |
| 1469 | complain_overflow_dont, /* complain_on_overflow */ |
| 1470 | bfd_elf_generic_reloc, /* special_function */ |
| 1471 | "R_PPC_VLE_LO16D", /* name */ |
| 1472 | FALSE, /* partial_inplace */ |
| 1473 | 0, /* src_mask */ |
| 1474 | 0x1f07ff, /* dst_mask */ |
| 1475 | FALSE), /* pcrel_offset */ |
| 1476 | |
| 1477 | /* Bits 16-31 split16a format. */ |
| 1478 | HOWTO (R_PPC_VLE_HI16A, /* type */ |
| 1479 | 16, /* rightshift */ |
| 1480 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1481 | 16, /* bitsize */ |
| 1482 | FALSE, /* pc_relative */ |
| 1483 | 0, /* bitpos */ |
| 1484 | complain_overflow_dont, /* complain_on_overflow */ |
| 1485 | bfd_elf_generic_reloc, /* special_function */ |
| 1486 | "R_PPC_VLE_HI16A", /* name */ |
| 1487 | FALSE, /* partial_inplace */ |
| 1488 | 0, /* src_mask */ |
| 1489 | 0x1f007ff, /* dst_mask */ |
| 1490 | FALSE), /* pcrel_offset */ |
| 1491 | |
| 1492 | /* Bits 16-31 split16d format. */ |
| 1493 | HOWTO (R_PPC_VLE_HI16D, /* type */ |
| 1494 | 16, /* rightshift */ |
| 1495 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1496 | 16, /* bitsize */ |
| 1497 | FALSE, /* pc_relative */ |
| 1498 | 0, /* bitpos */ |
| 1499 | complain_overflow_dont, /* complain_on_overflow */ |
| 1500 | bfd_elf_generic_reloc, /* special_function */ |
| 1501 | "R_PPC_VLE_HI16D", /* name */ |
| 1502 | FALSE, /* partial_inplace */ |
| 1503 | 0, /* src_mask */ |
| 1504 | 0x1f07ff, /* dst_mask */ |
| 1505 | FALSE), /* pcrel_offset */ |
| 1506 | |
| 1507 | /* Bits 16-31 (High Adjusted) in split16a format. */ |
| 1508 | HOWTO (R_PPC_VLE_HA16A, /* type */ |
| 1509 | 16, /* rightshift */ |
| 1510 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1511 | 16, /* bitsize */ |
| 1512 | FALSE, /* pc_relative */ |
| 1513 | 0, /* bitpos */ |
| 1514 | complain_overflow_dont, /* complain_on_overflow */ |
| 1515 | bfd_elf_generic_reloc, /* special_function */ |
| 1516 | "R_PPC_VLE_HA16A", /* name */ |
| 1517 | FALSE, /* partial_inplace */ |
| 1518 | 0, /* src_mask */ |
| 1519 | 0x1f007ff, /* dst_mask */ |
| 1520 | FALSE), /* pcrel_offset */ |
| 1521 | |
| 1522 | /* Bits 16-31 (High Adjusted) in split16d format. */ |
| 1523 | HOWTO (R_PPC_VLE_HA16D, /* type */ |
| 1524 | 16, /* rightshift */ |
| 1525 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1526 | 16, /* bitsize */ |
| 1527 | FALSE, /* pc_relative */ |
| 1528 | 0, /* bitpos */ |
| 1529 | complain_overflow_dont, /* complain_on_overflow */ |
| 1530 | bfd_elf_generic_reloc, /* special_function */ |
| 1531 | "R_PPC_VLE_HA16D", /* name */ |
| 1532 | FALSE, /* partial_inplace */ |
| 1533 | 0, /* src_mask */ |
| 1534 | 0x1f07ff, /* dst_mask */ |
| 1535 | FALSE), /* pcrel_offset */ |
| 1536 | |
| 1537 | /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i |
| 1538 | instructions. If the register base is 0 then the linker changes |
| 1539 | the e_add16i to an e_li instruction. */ |
| 1540 | HOWTO (R_PPC_VLE_SDA21, /* type */ |
| 1541 | 0, /* rightshift */ |
| 1542 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1543 | 16, /* bitsize */ |
| 1544 | FALSE, /* pc_relative */ |
| 1545 | 0, /* bitpos */ |
| 1546 | complain_overflow_signed, /* complain_on_overflow */ |
| 1547 | bfd_elf_generic_reloc, /* special_function */ |
| 1548 | "R_PPC_VLE_SDA21", /* name */ |
| 1549 | FALSE, /* partial_inplace */ |
| 1550 | 0, /* src_mask */ |
| 1551 | 0xffff, /* dst_mask */ |
| 1552 | FALSE), /* pcrel_offset */ |
| 1553 | |
| 1554 | /* Like R_PPC_VLE_SDA21 but ignore overflow. */ |
| 1555 | HOWTO (R_PPC_VLE_SDA21_LO, /* type */ |
| 1556 | 0, /* rightshift */ |
| 1557 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1558 | 16, /* bitsize */ |
| 1559 | FALSE, /* pc_relative */ |
| 1560 | 0, /* bitpos */ |
| 1561 | complain_overflow_dont, /* complain_on_overflow */ |
| 1562 | bfd_elf_generic_reloc, /* special_function */ |
| 1563 | "R_PPC_VLE_SDA21_LO", /* name */ |
| 1564 | FALSE, /* partial_inplace */ |
| 1565 | 0, /* src_mask */ |
| 1566 | 0xffff, /* dst_mask */ |
| 1567 | FALSE), /* pcrel_offset */ |
| 1568 | |
| 1569 | /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ |
| 1570 | HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ |
| 1571 | 0, /* rightshift */ |
| 1572 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1573 | 16, /* bitsize */ |
| 1574 | FALSE, /* pc_relative */ |
| 1575 | 0, /* bitpos */ |
| 1576 | complain_overflow_dont, /* complain_on_overflow */ |
| 1577 | bfd_elf_generic_reloc, /* special_function */ |
| 1578 | "R_PPC_VLE_SDAREL_LO16A", /* name */ |
| 1579 | FALSE, /* partial_inplace */ |
| 1580 | 0, /* src_mask */ |
| 1581 | 0x1f007ff, /* dst_mask */ |
| 1582 | FALSE), /* pcrel_offset */ |
| 1583 | |
| 1584 | /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ |
| 1585 | HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ |
| 1586 | 0, /* rightshift */ |
| 1587 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1588 | 16, /* bitsize */ |
| 1589 | FALSE, /* pc_relative */ |
| 1590 | 0, /* bitpos */ |
| 1591 | complain_overflow_dont, /* complain_on_overflow */ |
| 1592 | bfd_elf_generic_reloc, /* special_function */ |
| 1593 | "R_PPC_VLE_SDAREL_LO16D", /* name */ |
| 1594 | FALSE, /* partial_inplace */ |
| 1595 | 0, /* src_mask */ |
| 1596 | 0x1f07ff, /* dst_mask */ |
| 1597 | FALSE), /* pcrel_offset */ |
| 1598 | |
| 1599 | /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ |
| 1600 | HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ |
| 1601 | 16, /* rightshift */ |
| 1602 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1603 | 16, /* bitsize */ |
| 1604 | FALSE, /* pc_relative */ |
| 1605 | 0, /* bitpos */ |
| 1606 | complain_overflow_dont, /* complain_on_overflow */ |
| 1607 | bfd_elf_generic_reloc, /* special_function */ |
| 1608 | "R_PPC_VLE_SDAREL_HI16A", /* name */ |
| 1609 | FALSE, /* partial_inplace */ |
| 1610 | 0, /* src_mask */ |
| 1611 | 0x1f007ff, /* dst_mask */ |
| 1612 | FALSE), /* pcrel_offset */ |
| 1613 | |
| 1614 | /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ |
| 1615 | HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ |
| 1616 | 16, /* rightshift */ |
| 1617 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1618 | 16, /* bitsize */ |
| 1619 | FALSE, /* pc_relative */ |
| 1620 | 0, /* bitpos */ |
| 1621 | complain_overflow_dont, /* complain_on_overflow */ |
| 1622 | bfd_elf_generic_reloc, /* special_function */ |
| 1623 | "R_PPC_VLE_SDAREL_HI16D", /* name */ |
| 1624 | FALSE, /* partial_inplace */ |
| 1625 | 0, /* src_mask */ |
| 1626 | 0x1f07ff, /* dst_mask */ |
| 1627 | FALSE), /* pcrel_offset */ |
| 1628 | |
| 1629 | /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ |
| 1630 | HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ |
| 1631 | 16, /* rightshift */ |
| 1632 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1633 | 16, /* bitsize */ |
| 1634 | FALSE, /* pc_relative */ |
| 1635 | 0, /* bitpos */ |
| 1636 | complain_overflow_dont, /* complain_on_overflow */ |
| 1637 | bfd_elf_generic_reloc, /* special_function */ |
| 1638 | "R_PPC_VLE_SDAREL_HA16A", /* name */ |
| 1639 | FALSE, /* partial_inplace */ |
| 1640 | 0, /* src_mask */ |
| 1641 | 0x1f007ff, /* dst_mask */ |
| 1642 | FALSE), /* pcrel_offset */ |
| 1643 | |
| 1644 | /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ |
| 1645 | HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ |
| 1646 | 16, /* rightshift */ |
| 1647 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1648 | 16, /* bitsize */ |
| 1649 | FALSE, /* pc_relative */ |
| 1650 | 0, /* bitpos */ |
| 1651 | complain_overflow_dont, /* complain_on_overflow */ |
| 1652 | bfd_elf_generic_reloc, /* special_function */ |
| 1653 | "R_PPC_VLE_SDAREL_HA16D", /* name */ |
| 1654 | FALSE, /* partial_inplace */ |
| 1655 | 0, /* src_mask */ |
| 1656 | 0x1f07ff, /* dst_mask */ |
| 1657 | FALSE), /* pcrel_offset */ |
| 1658 | |
| 1659 | HOWTO (R_PPC_IRELATIVE, /* type */ |
| 1660 | 0, /* rightshift */ |
| 1661 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1662 | 32, /* bitsize */ |
| 1663 | FALSE, /* pc_relative */ |
| 1664 | 0, /* bitpos */ |
| 1665 | complain_overflow_dont, /* complain_on_overflow */ |
| 1666 | bfd_elf_generic_reloc, /* special_function */ |
| 1667 | "R_PPC_IRELATIVE", /* name */ |
| 1668 | FALSE, /* partial_inplace */ |
| 1669 | 0, /* src_mask */ |
| 1670 | 0xffffffff, /* dst_mask */ |
| 1671 | FALSE), /* pcrel_offset */ |
| 1672 | |
| 1673 | /* A 16 bit relative relocation. */ |
| 1674 | HOWTO (R_PPC_REL16, /* type */ |
| 1675 | 0, /* rightshift */ |
| 1676 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1677 | 16, /* bitsize */ |
| 1678 | TRUE, /* pc_relative */ |
| 1679 | 0, /* bitpos */ |
| 1680 | complain_overflow_signed, /* complain_on_overflow */ |
| 1681 | bfd_elf_generic_reloc, /* special_function */ |
| 1682 | "R_PPC_REL16", /* name */ |
| 1683 | FALSE, /* partial_inplace */ |
| 1684 | 0, /* src_mask */ |
| 1685 | 0xffff, /* dst_mask */ |
| 1686 | TRUE), /* pcrel_offset */ |
| 1687 | |
| 1688 | /* A 16 bit relative relocation without overflow. */ |
| 1689 | HOWTO (R_PPC_REL16_LO, /* type */ |
| 1690 | 0, /* rightshift */ |
| 1691 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1692 | 16, /* bitsize */ |
| 1693 | TRUE, /* pc_relative */ |
| 1694 | 0, /* bitpos */ |
| 1695 | complain_overflow_dont,/* complain_on_overflow */ |
| 1696 | bfd_elf_generic_reloc, /* special_function */ |
| 1697 | "R_PPC_REL16_LO", /* name */ |
| 1698 | FALSE, /* partial_inplace */ |
| 1699 | 0, /* src_mask */ |
| 1700 | 0xffff, /* dst_mask */ |
| 1701 | TRUE), /* pcrel_offset */ |
| 1702 | |
| 1703 | /* The high order 16 bits of a relative address. */ |
| 1704 | HOWTO (R_PPC_REL16_HI, /* type */ |
| 1705 | 16, /* rightshift */ |
| 1706 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1707 | 16, /* bitsize */ |
| 1708 | TRUE, /* pc_relative */ |
| 1709 | 0, /* bitpos */ |
| 1710 | complain_overflow_dont, /* complain_on_overflow */ |
| 1711 | bfd_elf_generic_reloc, /* special_function */ |
| 1712 | "R_PPC_REL16_HI", /* name */ |
| 1713 | FALSE, /* partial_inplace */ |
| 1714 | 0, /* src_mask */ |
| 1715 | 0xffff, /* dst_mask */ |
| 1716 | TRUE), /* pcrel_offset */ |
| 1717 | |
| 1718 | /* The high order 16 bits of a relative address, plus 1 if the contents of |
| 1719 | the low 16 bits, treated as a signed number, is negative. */ |
| 1720 | HOWTO (R_PPC_REL16_HA, /* type */ |
| 1721 | 16, /* rightshift */ |
| 1722 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1723 | 16, /* bitsize */ |
| 1724 | TRUE, /* pc_relative */ |
| 1725 | 0, /* bitpos */ |
| 1726 | complain_overflow_dont, /* complain_on_overflow */ |
| 1727 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1728 | "R_PPC_REL16_HA", /* name */ |
| 1729 | FALSE, /* partial_inplace */ |
| 1730 | 0, /* src_mask */ |
| 1731 | 0xffff, /* dst_mask */ |
| 1732 | TRUE), /* pcrel_offset */ |
| 1733 | |
| 1734 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1735 | HOWTO (R_PPC_GNU_VTINHERIT, /* type */ |
| 1736 | 0, /* rightshift */ |
| 1737 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1738 | 0, /* bitsize */ |
| 1739 | FALSE, /* pc_relative */ |
| 1740 | 0, /* bitpos */ |
| 1741 | complain_overflow_dont, /* complain_on_overflow */ |
| 1742 | NULL, /* special_function */ |
| 1743 | "R_PPC_GNU_VTINHERIT", /* name */ |
| 1744 | FALSE, /* partial_inplace */ |
| 1745 | 0, /* src_mask */ |
| 1746 | 0, /* dst_mask */ |
| 1747 | FALSE), /* pcrel_offset */ |
| 1748 | |
| 1749 | /* GNU extension to record C++ vtable member usage. */ |
| 1750 | HOWTO (R_PPC_GNU_VTENTRY, /* type */ |
| 1751 | 0, /* rightshift */ |
| 1752 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1753 | 0, /* bitsize */ |
| 1754 | FALSE, /* pc_relative */ |
| 1755 | 0, /* bitpos */ |
| 1756 | complain_overflow_dont, /* complain_on_overflow */ |
| 1757 | NULL, /* special_function */ |
| 1758 | "R_PPC_GNU_VTENTRY", /* name */ |
| 1759 | FALSE, /* partial_inplace */ |
| 1760 | 0, /* src_mask */ |
| 1761 | 0, /* dst_mask */ |
| 1762 | FALSE), /* pcrel_offset */ |
| 1763 | |
| 1764 | /* Phony reloc to handle AIX style TOC entries. */ |
| 1765 | HOWTO (R_PPC_TOC16, /* type */ |
| 1766 | 0, /* rightshift */ |
| 1767 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1768 | 16, /* bitsize */ |
| 1769 | FALSE, /* pc_relative */ |
| 1770 | 0, /* bitpos */ |
| 1771 | complain_overflow_signed, /* complain_on_overflow */ |
| 1772 | bfd_elf_generic_reloc, /* special_function */ |
| 1773 | "R_PPC_TOC16", /* name */ |
| 1774 | FALSE, /* partial_inplace */ |
| 1775 | 0, /* src_mask */ |
| 1776 | 0xffff, /* dst_mask */ |
| 1777 | FALSE), /* pcrel_offset */ |
| 1778 | }; |
| 1779 | |
| 1780 | /* External 32-bit PPC structure for PRPSINFO. This structure is |
| 1781 | ABI-defined, thus we choose to use char arrays here in order to |
| 1782 | avoid dealing with different types in different architectures. |
| 1783 | |
| 1784 | The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while |
| 1785 | most non-PPC architectures use `short int'. |
| 1786 | |
| 1787 | This structure will ultimately be written in the corefile's note |
| 1788 | section, as the PRPSINFO. */ |
| 1789 | |
| 1790 | struct elf_external_ppc_linux_prpsinfo32 |
| 1791 | { |
| 1792 | char pr_state; /* Numeric process state. */ |
| 1793 | char pr_sname; /* Char for pr_state. */ |
| 1794 | char pr_zomb; /* Zombie. */ |
| 1795 | char pr_nice; /* Nice val. */ |
| 1796 | char pr_flag[4]; /* Flags. */ |
| 1797 | char pr_uid[4]; |
| 1798 | char pr_gid[4]; |
| 1799 | char pr_pid[4]; |
| 1800 | char pr_ppid[4]; |
| 1801 | char pr_pgrp[4]; |
| 1802 | char pr_sid[4]; |
| 1803 | char pr_fname[16]; /* Filename of executable. */ |
| 1804 | char pr_psargs[80]; /* Initial part of arg list. */ |
| 1805 | }; |
| 1806 | |
| 1807 | /* Helper macro to swap (properly handling endianess) things from the |
| 1808 | `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32' |
| 1809 | structure. |
| 1810 | |
| 1811 | Note that FROM should be a pointer, and TO should be the explicit type. */ |
| 1812 | |
| 1813 | #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \ |
| 1814 | do \ |
| 1815 | { \ |
| 1816 | H_PUT_8 (abfd, from->pr_state, &to.pr_state); \ |
| 1817 | H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \ |
| 1818 | H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \ |
| 1819 | H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \ |
| 1820 | H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \ |
| 1821 | H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \ |
| 1822 | H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \ |
| 1823 | H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \ |
| 1824 | H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \ |
| 1825 | H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \ |
| 1826 | H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \ |
| 1827 | strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \ |
| 1828 | strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \ |
| 1829 | } while (0) |
| 1830 | |
| 1831 | \f |
| 1832 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 1833 | |
| 1834 | static void |
| 1835 | ppc_elf_howto_init (void) |
| 1836 | { |
| 1837 | unsigned int i, type; |
| 1838 | |
| 1839 | for (i = 0; |
| 1840 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 1841 | i++) |
| 1842 | { |
| 1843 | type = ppc_elf_howto_raw[i].type; |
| 1844 | if (type >= (sizeof (ppc_elf_howto_table) |
| 1845 | / sizeof (ppc_elf_howto_table[0]))) |
| 1846 | abort (); |
| 1847 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 1848 | } |
| 1849 | } |
| 1850 | |
| 1851 | static reloc_howto_type * |
| 1852 | ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1853 | bfd_reloc_code_real_type code) |
| 1854 | { |
| 1855 | enum elf_ppc_reloc_type r; |
| 1856 | |
| 1857 | /* Initialize howto table if not already done. */ |
| 1858 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1859 | ppc_elf_howto_init (); |
| 1860 | |
| 1861 | switch (code) |
| 1862 | { |
| 1863 | default: |
| 1864 | return NULL; |
| 1865 | |
| 1866 | case BFD_RELOC_NONE: r = R_PPC_NONE; break; |
| 1867 | case BFD_RELOC_32: r = R_PPC_ADDR32; break; |
| 1868 | case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; |
| 1869 | case BFD_RELOC_PPC64_ADDR16_DS: |
| 1870 | case BFD_RELOC_16: r = R_PPC_ADDR16; break; |
| 1871 | case BFD_RELOC_PPC64_ADDR16_LO_DS: |
| 1872 | case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; |
| 1873 | case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; |
| 1874 | case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; |
| 1875 | case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; |
| 1876 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; |
| 1877 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; |
| 1878 | case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; |
| 1879 | case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; |
| 1880 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; |
| 1881 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; |
| 1882 | case BFD_RELOC_PPC64_GOT16_DS: |
| 1883 | case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; |
| 1884 | case BFD_RELOC_PPC64_GOT16_LO_DS: |
| 1885 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; |
| 1886 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; |
| 1887 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; |
| 1888 | case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; |
| 1889 | case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; |
| 1890 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; |
| 1891 | case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; |
| 1892 | case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; |
| 1893 | case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; |
| 1894 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; |
| 1895 | case BFD_RELOC_PPC64_PLT16_LO_DS: |
| 1896 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; |
| 1897 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; |
| 1898 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; |
| 1899 | case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; |
| 1900 | case BFD_RELOC_PPC64_SECTOFF_DS: |
| 1901 | case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; |
| 1902 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: |
| 1903 | case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; |
| 1904 | case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; |
| 1905 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; |
| 1906 | case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; |
| 1907 | case BFD_RELOC_PPC64_TOC16_DS: |
| 1908 | case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; |
| 1909 | case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; |
| 1910 | case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; |
| 1911 | case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; |
| 1912 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; |
| 1913 | case BFD_RELOC_PPC64_TPREL16_DS: |
| 1914 | case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; |
| 1915 | case BFD_RELOC_PPC64_TPREL16_LO_DS: |
| 1916 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; |
| 1917 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; |
| 1918 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; |
| 1919 | case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; |
| 1920 | case BFD_RELOC_PPC64_DTPREL16_DS: |
| 1921 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; |
| 1922 | case BFD_RELOC_PPC64_DTPREL16_LO_DS: |
| 1923 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; |
| 1924 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; |
| 1925 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; |
| 1926 | case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; |
| 1927 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; |
| 1928 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; |
| 1929 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; |
| 1930 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; |
| 1931 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; |
| 1932 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; |
| 1933 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; |
| 1934 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; |
| 1935 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; |
| 1936 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; |
| 1937 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; |
| 1938 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; |
| 1939 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; |
| 1940 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; |
| 1941 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; |
| 1942 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; |
| 1943 | case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; |
| 1944 | case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; |
| 1945 | case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; |
| 1946 | case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; |
| 1947 | case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; |
| 1948 | case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; |
| 1949 | case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; |
| 1950 | case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; |
| 1951 | case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; |
| 1952 | case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; |
| 1953 | case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; |
| 1954 | case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; |
| 1955 | case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; |
| 1956 | case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; |
| 1957 | case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; |
| 1958 | case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; |
| 1959 | case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; |
| 1960 | case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; |
| 1961 | case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; |
| 1962 | case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; |
| 1963 | case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; |
| 1964 | case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; |
| 1965 | case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; |
| 1966 | case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; |
| 1967 | case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; |
| 1968 | case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; |
| 1969 | case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; |
| 1970 | case BFD_RELOC_PPC_VLE_SDAREL_LO16A: |
| 1971 | r = R_PPC_VLE_SDAREL_LO16A; |
| 1972 | break; |
| 1973 | case BFD_RELOC_PPC_VLE_SDAREL_LO16D: |
| 1974 | r = R_PPC_VLE_SDAREL_LO16D; |
| 1975 | break; |
| 1976 | case BFD_RELOC_PPC_VLE_SDAREL_HI16A: |
| 1977 | r = R_PPC_VLE_SDAREL_HI16A; |
| 1978 | break; |
| 1979 | case BFD_RELOC_PPC_VLE_SDAREL_HI16D: |
| 1980 | r = R_PPC_VLE_SDAREL_HI16D; |
| 1981 | break; |
| 1982 | case BFD_RELOC_PPC_VLE_SDAREL_HA16A: |
| 1983 | r = R_PPC_VLE_SDAREL_HA16A; |
| 1984 | break; |
| 1985 | case BFD_RELOC_PPC_VLE_SDAREL_HA16D: |
| 1986 | r = R_PPC_VLE_SDAREL_HA16D; |
| 1987 | break; |
| 1988 | case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; |
| 1989 | case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; |
| 1990 | case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; |
| 1991 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; |
| 1992 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; |
| 1993 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; |
| 1994 | } |
| 1995 | |
| 1996 | return ppc_elf_howto_table[r]; |
| 1997 | }; |
| 1998 | |
| 1999 | static reloc_howto_type * |
| 2000 | ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 2001 | const char *r_name) |
| 2002 | { |
| 2003 | unsigned int i; |
| 2004 | |
| 2005 | for (i = 0; |
| 2006 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 2007 | i++) |
| 2008 | if (ppc_elf_howto_raw[i].name != NULL |
| 2009 | && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) |
| 2010 | return &ppc_elf_howto_raw[i]; |
| 2011 | |
| 2012 | return NULL; |
| 2013 | } |
| 2014 | |
| 2015 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 2016 | |
| 2017 | static void |
| 2018 | ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 2019 | arelent *cache_ptr, |
| 2020 | Elf_Internal_Rela *dst) |
| 2021 | { |
| 2022 | unsigned int r_type; |
| 2023 | |
| 2024 | /* Initialize howto table if not already done. */ |
| 2025 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 2026 | ppc_elf_howto_init (); |
| 2027 | |
| 2028 | r_type = ELF32_R_TYPE (dst->r_info); |
| 2029 | if (r_type >= R_PPC_max) |
| 2030 | { |
| 2031 | (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"), |
| 2032 | abfd, r_type); |
| 2033 | bfd_set_error (bfd_error_bad_value); |
| 2034 | r_type = R_PPC_NONE; |
| 2035 | } |
| 2036 | cache_ptr->howto = ppc_elf_howto_table[r_type]; |
| 2037 | |
| 2038 | /* Just because the above assert didn't trigger doesn't mean that |
| 2039 | ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ |
| 2040 | if (!cache_ptr->howto) |
| 2041 | { |
| 2042 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
| 2043 | abfd, r_type); |
| 2044 | bfd_set_error (bfd_error_bad_value); |
| 2045 | |
| 2046 | cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; |
| 2047 | } |
| 2048 | } |
| 2049 | |
| 2050 | /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ |
| 2051 | |
| 2052 | static bfd_reloc_status_type |
| 2053 | ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 2054 | arelent *reloc_entry, |
| 2055 | asymbol *symbol, |
| 2056 | void *data ATTRIBUTE_UNUSED, |
| 2057 | asection *input_section, |
| 2058 | bfd *output_bfd, |
| 2059 | char **error_message ATTRIBUTE_UNUSED) |
| 2060 | { |
| 2061 | bfd_vma relocation; |
| 2062 | |
| 2063 | if (output_bfd != NULL) |
| 2064 | { |
| 2065 | reloc_entry->address += input_section->output_offset; |
| 2066 | return bfd_reloc_ok; |
| 2067 | } |
| 2068 | |
| 2069 | if (bfd_is_com_section (symbol->section)) |
| 2070 | relocation = 0; |
| 2071 | else |
| 2072 | relocation = symbol->value; |
| 2073 | |
| 2074 | relocation += symbol->section->output_section->vma; |
| 2075 | relocation += symbol->section->output_offset; |
| 2076 | relocation += reloc_entry->addend; |
| 2077 | if (reloc_entry->howto->pc_relative) |
| 2078 | relocation -= reloc_entry->address; |
| 2079 | |
| 2080 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 2081 | |
| 2082 | return bfd_reloc_continue; |
| 2083 | } |
| 2084 | |
| 2085 | static bfd_reloc_status_type |
| 2086 | ppc_elf_unhandled_reloc (bfd *abfd, |
| 2087 | arelent *reloc_entry, |
| 2088 | asymbol *symbol, |
| 2089 | void *data, |
| 2090 | asection *input_section, |
| 2091 | bfd *output_bfd, |
| 2092 | char **error_message) |
| 2093 | { |
| 2094 | /* If this is a relocatable link (output_bfd test tells us), just |
| 2095 | call the generic function. Any adjustment will be done at final |
| 2096 | link time. */ |
| 2097 | if (output_bfd != NULL) |
| 2098 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 2099 | input_section, output_bfd, error_message); |
| 2100 | |
| 2101 | if (error_message != NULL) |
| 2102 | { |
| 2103 | static char buf[60]; |
| 2104 | sprintf (buf, _("generic linker can't handle %s"), |
| 2105 | reloc_entry->howto->name); |
| 2106 | *error_message = buf; |
| 2107 | } |
| 2108 | return bfd_reloc_dangerous; |
| 2109 | } |
| 2110 | \f |
| 2111 | /* Sections created by the linker. */ |
| 2112 | |
| 2113 | typedef struct elf_linker_section |
| 2114 | { |
| 2115 | /* Pointer to the bfd section. */ |
| 2116 | asection *section; |
| 2117 | /* Section name. */ |
| 2118 | const char *name; |
| 2119 | /* Associated bss section name. */ |
| 2120 | const char *bss_name; |
| 2121 | /* Associated symbol name. */ |
| 2122 | const char *sym_name; |
| 2123 | /* Associated symbol. */ |
| 2124 | struct elf_link_hash_entry *sym; |
| 2125 | } elf_linker_section_t; |
| 2126 | |
| 2127 | /* Linked list of allocated pointer entries. This hangs off of the |
| 2128 | symbol lists, and provides allows us to return different pointers, |
| 2129 | based on different addend's. */ |
| 2130 | |
| 2131 | typedef struct elf_linker_section_pointers |
| 2132 | { |
| 2133 | /* next allocated pointer for this symbol */ |
| 2134 | struct elf_linker_section_pointers *next; |
| 2135 | /* offset of pointer from beginning of section */ |
| 2136 | bfd_vma offset; |
| 2137 | /* addend used */ |
| 2138 | bfd_vma addend; |
| 2139 | /* which linker section this is */ |
| 2140 | elf_linker_section_t *lsect; |
| 2141 | } elf_linker_section_pointers_t; |
| 2142 | |
| 2143 | struct ppc_elf_obj_tdata |
| 2144 | { |
| 2145 | struct elf_obj_tdata elf; |
| 2146 | |
| 2147 | /* A mapping from local symbols to offsets into the various linker |
| 2148 | sections added. This is index by the symbol index. */ |
| 2149 | elf_linker_section_pointers_t **linker_section_pointers; |
| 2150 | |
| 2151 | /* Flags used to auto-detect plt type. */ |
| 2152 | unsigned int makes_plt_call : 1; |
| 2153 | unsigned int has_rel16 : 1; |
| 2154 | }; |
| 2155 | |
| 2156 | #define ppc_elf_tdata(bfd) \ |
| 2157 | ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) |
| 2158 | |
| 2159 | #define elf_local_ptr_offsets(bfd) \ |
| 2160 | (ppc_elf_tdata (bfd)->linker_section_pointers) |
| 2161 | |
| 2162 | #define is_ppc_elf(bfd) \ |
| 2163 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 2164 | && elf_object_id (bfd) == PPC32_ELF_DATA) |
| 2165 | |
| 2166 | /* Override the generic function because we store some extras. */ |
| 2167 | |
| 2168 | static bfd_boolean |
| 2169 | ppc_elf_mkobject (bfd *abfd) |
| 2170 | { |
| 2171 | return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), |
| 2172 | PPC32_ELF_DATA); |
| 2173 | } |
| 2174 | |
| 2175 | /* Fix bad default arch selected for a 32 bit input bfd when the |
| 2176 | default is 64 bit. */ |
| 2177 | |
| 2178 | static bfd_boolean |
| 2179 | ppc_elf_object_p (bfd *abfd) |
| 2180 | { |
| 2181 | if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) |
| 2182 | { |
| 2183 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 2184 | |
| 2185 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) |
| 2186 | { |
| 2187 | /* Relies on arch after 64 bit default being 32 bit default. */ |
| 2188 | abfd->arch_info = abfd->arch_info->next; |
| 2189 | BFD_ASSERT (abfd->arch_info->bits_per_word == 32); |
| 2190 | } |
| 2191 | } |
| 2192 | return TRUE; |
| 2193 | } |
| 2194 | |
| 2195 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 2196 | |
| 2197 | static bfd_boolean |
| 2198 | ppc_elf_set_private_flags (bfd *abfd, flagword flags) |
| 2199 | { |
| 2200 | BFD_ASSERT (!elf_flags_init (abfd) |
| 2201 | || elf_elfheader (abfd)->e_flags == flags); |
| 2202 | |
| 2203 | elf_elfheader (abfd)->e_flags = flags; |
| 2204 | elf_flags_init (abfd) = TRUE; |
| 2205 | return TRUE; |
| 2206 | } |
| 2207 | |
| 2208 | /* Support for core dump NOTE sections. */ |
| 2209 | |
| 2210 | static bfd_boolean |
| 2211 | ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 2212 | { |
| 2213 | int offset; |
| 2214 | unsigned int size; |
| 2215 | |
| 2216 | switch (note->descsz) |
| 2217 | { |
| 2218 | default: |
| 2219 | return FALSE; |
| 2220 | |
| 2221 | case 268: /* Linux/PPC. */ |
| 2222 | /* pr_cursig */ |
| 2223 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 2224 | |
| 2225 | /* pr_pid */ |
| 2226 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 2227 | |
| 2228 | /* pr_reg */ |
| 2229 | offset = 72; |
| 2230 | size = 192; |
| 2231 | |
| 2232 | break; |
| 2233 | } |
| 2234 | |
| 2235 | /* Make a ".reg/999" section. */ |
| 2236 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 2237 | size, note->descpos + offset); |
| 2238 | } |
| 2239 | |
| 2240 | static bfd_boolean |
| 2241 | ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 2242 | { |
| 2243 | switch (note->descsz) |
| 2244 | { |
| 2245 | default: |
| 2246 | return FALSE; |
| 2247 | |
| 2248 | case 128: /* Linux/PPC elf_prpsinfo. */ |
| 2249 | elf_tdata (abfd)->core->pid |
| 2250 | = bfd_get_32 (abfd, note->descdata + 16); |
| 2251 | elf_tdata (abfd)->core->program |
| 2252 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 2253 | elf_tdata (abfd)->core->command |
| 2254 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 2255 | } |
| 2256 | |
| 2257 | /* Note that for some reason, a spurious space is tacked |
| 2258 | onto the end of the args in some (at least one anyway) |
| 2259 | implementations, so strip it off if it exists. */ |
| 2260 | |
| 2261 | { |
| 2262 | char *command = elf_tdata (abfd)->core->command; |
| 2263 | int n = strlen (command); |
| 2264 | |
| 2265 | if (0 < n && command[n - 1] == ' ') |
| 2266 | command[n - 1] = '\0'; |
| 2267 | } |
| 2268 | |
| 2269 | return TRUE; |
| 2270 | } |
| 2271 | |
| 2272 | char * |
| 2273 | elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz, |
| 2274 | const struct elf_internal_linux_prpsinfo *prpsinfo) |
| 2275 | { |
| 2276 | struct elf_external_ppc_linux_prpsinfo32 data; |
| 2277 | |
| 2278 | memset (&data, 0, sizeof (data)); |
| 2279 | PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data); |
| 2280 | |
| 2281 | return elfcore_write_note (abfd, buf, bufsiz, |
| 2282 | "CORE", NT_PRPSINFO, &data, sizeof (data)); |
| 2283 | } |
| 2284 | |
| 2285 | static char * |
| 2286 | ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) |
| 2287 | { |
| 2288 | switch (note_type) |
| 2289 | { |
| 2290 | default: |
| 2291 | return NULL; |
| 2292 | |
| 2293 | case NT_PRPSINFO: |
| 2294 | { |
| 2295 | char data[128]; |
| 2296 | va_list ap; |
| 2297 | |
| 2298 | va_start (ap, note_type); |
| 2299 | memset (data, 0, sizeof (data)); |
| 2300 | strncpy (data + 32, va_arg (ap, const char *), 16); |
| 2301 | strncpy (data + 48, va_arg (ap, const char *), 80); |
| 2302 | va_end (ap); |
| 2303 | return elfcore_write_note (abfd, buf, bufsiz, |
| 2304 | "CORE", note_type, data, sizeof (data)); |
| 2305 | } |
| 2306 | |
| 2307 | case NT_PRSTATUS: |
| 2308 | { |
| 2309 | char data[268]; |
| 2310 | va_list ap; |
| 2311 | long pid; |
| 2312 | int cursig; |
| 2313 | const void *greg; |
| 2314 | |
| 2315 | va_start (ap, note_type); |
| 2316 | memset (data, 0, 72); |
| 2317 | pid = va_arg (ap, long); |
| 2318 | bfd_put_32 (abfd, pid, data + 24); |
| 2319 | cursig = va_arg (ap, int); |
| 2320 | bfd_put_16 (abfd, cursig, data + 12); |
| 2321 | greg = va_arg (ap, const void *); |
| 2322 | memcpy (data + 72, greg, 192); |
| 2323 | memset (data + 264, 0, 4); |
| 2324 | va_end (ap); |
| 2325 | return elfcore_write_note (abfd, buf, bufsiz, |
| 2326 | "CORE", note_type, data, sizeof (data)); |
| 2327 | } |
| 2328 | } |
| 2329 | } |
| 2330 | |
| 2331 | static flagword |
| 2332 | ppc_elf_lookup_section_flags (char *flag_name) |
| 2333 | { |
| 2334 | |
| 2335 | if (!strcmp (flag_name, "SHF_PPC_VLE")) |
| 2336 | return SHF_PPC_VLE; |
| 2337 | |
| 2338 | return 0; |
| 2339 | } |
| 2340 | |
| 2341 | /* Add the VLE flag if required. */ |
| 2342 | |
| 2343 | bfd_boolean |
| 2344 | ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr) |
| 2345 | { |
| 2346 | if (bfd_get_mach (abfd) == bfd_mach_ppc_vle |
| 2347 | && (shdr->sh_flags & SHF_EXECINSTR) != 0) |
| 2348 | shdr->sh_flags |= SHF_PPC_VLE; |
| 2349 | |
| 2350 | return TRUE; |
| 2351 | } |
| 2352 | |
| 2353 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 2354 | or (bfd_vma) -1 if it should not be included. */ |
| 2355 | |
| 2356 | static bfd_vma |
| 2357 | ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, |
| 2358 | const asection *plt ATTRIBUTE_UNUSED, |
| 2359 | const arelent *rel) |
| 2360 | { |
| 2361 | return rel->address; |
| 2362 | } |
| 2363 | |
| 2364 | /* Handle a PowerPC specific section when reading an object file. This |
| 2365 | is called when bfd_section_from_shdr finds a section with an unknown |
| 2366 | type. */ |
| 2367 | |
| 2368 | static bfd_boolean |
| 2369 | ppc_elf_section_from_shdr (bfd *abfd, |
| 2370 | Elf_Internal_Shdr *hdr, |
| 2371 | const char *name, |
| 2372 | int shindex) |
| 2373 | { |
| 2374 | asection *newsect; |
| 2375 | flagword flags; |
| 2376 | |
| 2377 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 2378 | return FALSE; |
| 2379 | |
| 2380 | newsect = hdr->bfd_section; |
| 2381 | flags = bfd_get_section_flags (abfd, newsect); |
| 2382 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 2383 | flags |= SEC_EXCLUDE; |
| 2384 | |
| 2385 | if (hdr->sh_type == SHT_ORDERED) |
| 2386 | flags |= SEC_SORT_ENTRIES; |
| 2387 | |
| 2388 | bfd_set_section_flags (abfd, newsect, flags); |
| 2389 | return TRUE; |
| 2390 | } |
| 2391 | |
| 2392 | /* Set up any other section flags and such that may be necessary. */ |
| 2393 | |
| 2394 | static bfd_boolean |
| 2395 | ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 2396 | Elf_Internal_Shdr *shdr, |
| 2397 | asection *asect) |
| 2398 | { |
| 2399 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 2400 | shdr->sh_type = SHT_ORDERED; |
| 2401 | |
| 2402 | return TRUE; |
| 2403 | } |
| 2404 | |
| 2405 | /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we |
| 2406 | need to bump up the number of section headers. */ |
| 2407 | |
| 2408 | static int |
| 2409 | ppc_elf_additional_program_headers (bfd *abfd, |
| 2410 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 2411 | { |
| 2412 | asection *s; |
| 2413 | int ret = 0; |
| 2414 | |
| 2415 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 2416 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 2417 | ++ret; |
| 2418 | |
| 2419 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 2420 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 2421 | ++ret; |
| 2422 | |
| 2423 | return ret; |
| 2424 | } |
| 2425 | |
| 2426 | /* Modify the segment map for VLE executables. */ |
| 2427 | |
| 2428 | bfd_boolean |
| 2429 | ppc_elf_modify_segment_map (bfd *abfd, |
| 2430 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 2431 | { |
| 2432 | struct elf_segment_map *m, *n; |
| 2433 | bfd_size_type amt; |
| 2434 | unsigned int j, k; |
| 2435 | bfd_boolean sect0_vle, sectj_vle; |
| 2436 | |
| 2437 | /* At this point in the link, output sections have already been sorted by |
| 2438 | LMA and assigned to segments. All that is left to do is to ensure |
| 2439 | there is no mixing of VLE & non-VLE sections in a text segment. |
| 2440 | If we find that case, we split the segment. |
| 2441 | We maintain the original output section order. */ |
| 2442 | |
| 2443 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) |
| 2444 | { |
| 2445 | if (m->count == 0) |
| 2446 | continue; |
| 2447 | |
| 2448 | sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0; |
| 2449 | for (j = 1; j < m->count; ++j) |
| 2450 | { |
| 2451 | sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0; |
| 2452 | |
| 2453 | if (sectj_vle != sect0_vle) |
| 2454 | break; |
| 2455 | } |
| 2456 | if (j >= m->count) |
| 2457 | continue; |
| 2458 | |
| 2459 | /* sections 0..j-1 stay in this (current) segment, |
| 2460 | the remainder are put in a new segment. |
| 2461 | The scan resumes with the new segment. */ |
| 2462 | |
| 2463 | /* Fix the new segment. */ |
| 2464 | amt = sizeof (struct elf_segment_map); |
| 2465 | amt += (m->count - j - 1) * sizeof (asection *); |
| 2466 | n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); |
| 2467 | if (n == NULL) |
| 2468 | return FALSE; |
| 2469 | |
| 2470 | n->p_type = PT_LOAD; |
| 2471 | n->p_flags = PF_X | PF_R; |
| 2472 | if (sectj_vle) |
| 2473 | n->p_flags |= PF_PPC_VLE; |
| 2474 | n->count = m->count - j; |
| 2475 | for (k = 0; k < n->count; ++k) |
| 2476 | { |
| 2477 | n->sections[k] = m->sections[j+k]; |
| 2478 | m->sections[j+k] = NULL; |
| 2479 | } |
| 2480 | n->next = m->next; |
| 2481 | m->next = n; |
| 2482 | |
| 2483 | /* Fix the current segment */ |
| 2484 | m->count = j; |
| 2485 | } |
| 2486 | |
| 2487 | return TRUE; |
| 2488 | } |
| 2489 | |
| 2490 | /* Add extra PPC sections -- Note, for now, make .sbss2 and |
| 2491 | .PPC.EMB.sbss0 a normal section, and not a bss section so |
| 2492 | that the linker doesn't crater when trying to make more than |
| 2493 | 2 sections. */ |
| 2494 | |
| 2495 | static const struct bfd_elf_special_section ppc_elf_special_sections[] = |
| 2496 | { |
| 2497 | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, |
| 2498 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 2499 | { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, |
| 2500 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 2501 | { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, |
| 2502 | { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, |
| 2503 | { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 }, |
| 2504 | { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 2505 | { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 2506 | { NULL, 0, 0, 0, 0 } |
| 2507 | }; |
| 2508 | |
| 2509 | /* This is what we want for new plt/got. */ |
| 2510 | static struct bfd_elf_special_section ppc_alt_plt = |
| 2511 | { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; |
| 2512 | |
| 2513 | static const struct bfd_elf_special_section * |
| 2514 | ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 2515 | { |
| 2516 | const struct bfd_elf_special_section *ssect; |
| 2517 | |
| 2518 | /* See if this is one of the special sections. */ |
| 2519 | if (sec->name == NULL) |
| 2520 | return NULL; |
| 2521 | |
| 2522 | ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, |
| 2523 | sec->use_rela_p); |
| 2524 | if (ssect != NULL) |
| 2525 | { |
| 2526 | if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) |
| 2527 | ssect = &ppc_alt_plt; |
| 2528 | return ssect; |
| 2529 | } |
| 2530 | |
| 2531 | return _bfd_elf_get_sec_type_attr (abfd, sec); |
| 2532 | } |
| 2533 | \f |
| 2534 | /* Very simple linked list structure for recording apuinfo values. */ |
| 2535 | typedef struct apuinfo_list |
| 2536 | { |
| 2537 | struct apuinfo_list *next; |
| 2538 | unsigned long value; |
| 2539 | } |
| 2540 | apuinfo_list; |
| 2541 | |
| 2542 | static apuinfo_list *head; |
| 2543 | static bfd_boolean apuinfo_set; |
| 2544 | |
| 2545 | static void |
| 2546 | apuinfo_list_init (void) |
| 2547 | { |
| 2548 | head = NULL; |
| 2549 | apuinfo_set = FALSE; |
| 2550 | } |
| 2551 | |
| 2552 | static void |
| 2553 | apuinfo_list_add (unsigned long value) |
| 2554 | { |
| 2555 | apuinfo_list *entry = head; |
| 2556 | |
| 2557 | while (entry != NULL) |
| 2558 | { |
| 2559 | if (entry->value == value) |
| 2560 | return; |
| 2561 | entry = entry->next; |
| 2562 | } |
| 2563 | |
| 2564 | entry = bfd_malloc (sizeof (* entry)); |
| 2565 | if (entry == NULL) |
| 2566 | return; |
| 2567 | |
| 2568 | entry->value = value; |
| 2569 | entry->next = head; |
| 2570 | head = entry; |
| 2571 | } |
| 2572 | |
| 2573 | static unsigned |
| 2574 | apuinfo_list_length (void) |
| 2575 | { |
| 2576 | apuinfo_list *entry; |
| 2577 | unsigned long count; |
| 2578 | |
| 2579 | for (entry = head, count = 0; |
| 2580 | entry; |
| 2581 | entry = entry->next) |
| 2582 | ++ count; |
| 2583 | |
| 2584 | return count; |
| 2585 | } |
| 2586 | |
| 2587 | static inline unsigned long |
| 2588 | apuinfo_list_element (unsigned long number) |
| 2589 | { |
| 2590 | apuinfo_list * entry; |
| 2591 | |
| 2592 | for (entry = head; |
| 2593 | entry && number --; |
| 2594 | entry = entry->next) |
| 2595 | ; |
| 2596 | |
| 2597 | return entry ? entry->value : 0; |
| 2598 | } |
| 2599 | |
| 2600 | static void |
| 2601 | apuinfo_list_finish (void) |
| 2602 | { |
| 2603 | apuinfo_list *entry; |
| 2604 | |
| 2605 | for (entry = head; entry;) |
| 2606 | { |
| 2607 | apuinfo_list *next = entry->next; |
| 2608 | free (entry); |
| 2609 | entry = next; |
| 2610 | } |
| 2611 | |
| 2612 | head = NULL; |
| 2613 | } |
| 2614 | |
| 2615 | #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" |
| 2616 | #define APUINFO_LABEL "APUinfo" |
| 2617 | |
| 2618 | /* Scan the input BFDs and create a linked list of |
| 2619 | the APUinfo values that will need to be emitted. */ |
| 2620 | |
| 2621 | static void |
| 2622 | ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) |
| 2623 | { |
| 2624 | bfd *ibfd; |
| 2625 | asection *asec; |
| 2626 | char *buffer = NULL; |
| 2627 | bfd_size_type largest_input_size = 0; |
| 2628 | unsigned i; |
| 2629 | unsigned long length; |
| 2630 | const char *error_message = NULL; |
| 2631 | |
| 2632 | if (link_info == NULL) |
| 2633 | return; |
| 2634 | |
| 2635 | apuinfo_list_init (); |
| 2636 | |
| 2637 | /* Read in the input sections contents. */ |
| 2638 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next) |
| 2639 | { |
| 2640 | unsigned long datum; |
| 2641 | |
| 2642 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 2643 | if (asec == NULL) |
| 2644 | continue; |
| 2645 | |
| 2646 | error_message = _("corrupt %s section in %B"); |
| 2647 | length = asec->size; |
| 2648 | if (length < 20) |
| 2649 | goto fail; |
| 2650 | |
| 2651 | apuinfo_set = TRUE; |
| 2652 | if (largest_input_size < asec->size) |
| 2653 | { |
| 2654 | if (buffer) |
| 2655 | free (buffer); |
| 2656 | largest_input_size = asec->size; |
| 2657 | buffer = bfd_malloc (largest_input_size); |
| 2658 | if (!buffer) |
| 2659 | return; |
| 2660 | } |
| 2661 | |
| 2662 | if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 |
| 2663 | || (bfd_bread (buffer, length, ibfd) != length)) |
| 2664 | { |
| 2665 | error_message = _("unable to read in %s section from %B"); |
| 2666 | goto fail; |
| 2667 | } |
| 2668 | |
| 2669 | /* Verify the contents of the header. Note - we have to |
| 2670 | extract the values this way in order to allow for a |
| 2671 | host whose endian-ness is different from the target. */ |
| 2672 | datum = bfd_get_32 (ibfd, buffer); |
| 2673 | if (datum != sizeof APUINFO_LABEL) |
| 2674 | goto fail; |
| 2675 | |
| 2676 | datum = bfd_get_32 (ibfd, buffer + 8); |
| 2677 | if (datum != 0x2) |
| 2678 | goto fail; |
| 2679 | |
| 2680 | if (strcmp (buffer + 12, APUINFO_LABEL) != 0) |
| 2681 | goto fail; |
| 2682 | |
| 2683 | /* Get the number of bytes used for apuinfo entries. */ |
| 2684 | datum = bfd_get_32 (ibfd, buffer + 4); |
| 2685 | if (datum + 20 != length) |
| 2686 | goto fail; |
| 2687 | |
| 2688 | /* Scan the apuinfo section, building a list of apuinfo numbers. */ |
| 2689 | for (i = 0; i < datum; i += 4) |
| 2690 | apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); |
| 2691 | } |
| 2692 | |
| 2693 | error_message = NULL; |
| 2694 | |
| 2695 | if (apuinfo_set) |
| 2696 | { |
| 2697 | /* Compute the size of the output section. */ |
| 2698 | unsigned num_entries = apuinfo_list_length (); |
| 2699 | |
| 2700 | /* Set the output section size, if it exists. */ |
| 2701 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 2702 | |
| 2703 | if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) |
| 2704 | { |
| 2705 | ibfd = abfd; |
| 2706 | error_message = _("warning: unable to set size of %s section in %B"); |
| 2707 | } |
| 2708 | } |
| 2709 | |
| 2710 | fail: |
| 2711 | if (buffer) |
| 2712 | free (buffer); |
| 2713 | |
| 2714 | if (error_message) |
| 2715 | (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); |
| 2716 | } |
| 2717 | |
| 2718 | /* Prevent the output section from accumulating the input sections' |
| 2719 | contents. We have already stored this in our linked list structure. */ |
| 2720 | |
| 2721 | static bfd_boolean |
| 2722 | ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, |
| 2723 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
| 2724 | asection *asec, |
| 2725 | bfd_byte *contents ATTRIBUTE_UNUSED) |
| 2726 | { |
| 2727 | return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; |
| 2728 | } |
| 2729 | |
| 2730 | /* Finally we can generate the output section. */ |
| 2731 | |
| 2732 | static void |
| 2733 | ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 2734 | { |
| 2735 | bfd_byte *buffer; |
| 2736 | asection *asec; |
| 2737 | unsigned i; |
| 2738 | unsigned num_entries; |
| 2739 | bfd_size_type length; |
| 2740 | |
| 2741 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 2742 | if (asec == NULL) |
| 2743 | return; |
| 2744 | |
| 2745 | if (!apuinfo_set) |
| 2746 | return; |
| 2747 | |
| 2748 | length = asec->size; |
| 2749 | if (length < 20) |
| 2750 | return; |
| 2751 | |
| 2752 | buffer = bfd_malloc (length); |
| 2753 | if (buffer == NULL) |
| 2754 | { |
| 2755 | (*_bfd_error_handler) |
| 2756 | (_("failed to allocate space for new APUinfo section.")); |
| 2757 | return; |
| 2758 | } |
| 2759 | |
| 2760 | /* Create the apuinfo header. */ |
| 2761 | num_entries = apuinfo_list_length (); |
| 2762 | bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); |
| 2763 | bfd_put_32 (abfd, num_entries * 4, buffer + 4); |
| 2764 | bfd_put_32 (abfd, 0x2, buffer + 8); |
| 2765 | strcpy ((char *) buffer + 12, APUINFO_LABEL); |
| 2766 | |
| 2767 | length = 20; |
| 2768 | for (i = 0; i < num_entries; i++) |
| 2769 | { |
| 2770 | bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); |
| 2771 | length += 4; |
| 2772 | } |
| 2773 | |
| 2774 | if (length != asec->size) |
| 2775 | (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); |
| 2776 | |
| 2777 | if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) |
| 2778 | (*_bfd_error_handler) (_("failed to install new APUinfo section.")); |
| 2779 | |
| 2780 | free (buffer); |
| 2781 | |
| 2782 | apuinfo_list_finish (); |
| 2783 | } |
| 2784 | \f |
| 2785 | static bfd_boolean |
| 2786 | is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) |
| 2787 | { |
| 2788 | bfd_byte buf[GLINK_ENTRY_SIZE]; |
| 2789 | |
| 2790 | if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) |
| 2791 | return FALSE; |
| 2792 | |
| 2793 | return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 |
| 2794 | && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 |
| 2795 | && bfd_get_32 (abfd, buf + 8) == MTCTR_11 |
| 2796 | && bfd_get_32 (abfd, buf + 12) == BCTR); |
| 2797 | } |
| 2798 | |
| 2799 | static bfd_boolean |
| 2800 | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) |
| 2801 | { |
| 2802 | bfd_vma vma = *(bfd_vma *) ptr; |
| 2803 | return ((section->flags & SEC_ALLOC) != 0 |
| 2804 | && section->vma <= vma |
| 2805 | && vma < section->vma + section->size); |
| 2806 | } |
| 2807 | |
| 2808 | static long |
| 2809 | ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, |
| 2810 | long dynsymcount, asymbol **dynsyms, |
| 2811 | asymbol **ret) |
| 2812 | { |
| 2813 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| 2814 | asection *plt, *relplt, *dynamic, *glink; |
| 2815 | bfd_vma glink_vma = 0; |
| 2816 | bfd_vma resolv_vma = 0; |
| 2817 | bfd_vma stub_vma; |
| 2818 | asymbol *s; |
| 2819 | arelent *p; |
| 2820 | long count, i; |
| 2821 | size_t size; |
| 2822 | char *names; |
| 2823 | bfd_byte buf[4]; |
| 2824 | |
| 2825 | *ret = NULL; |
| 2826 | |
| 2827 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
| 2828 | return 0; |
| 2829 | |
| 2830 | if (dynsymcount <= 0) |
| 2831 | return 0; |
| 2832 | |
| 2833 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2834 | if (relplt == NULL) |
| 2835 | return 0; |
| 2836 | |
| 2837 | plt = bfd_get_section_by_name (abfd, ".plt"); |
| 2838 | if (plt == NULL) |
| 2839 | return 0; |
| 2840 | |
| 2841 | /* Call common code to handle old-style executable PLTs. */ |
| 2842 | if (elf_section_flags (plt) & SHF_EXECINSTR) |
| 2843 | return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, |
| 2844 | dynsymcount, dynsyms, ret); |
| 2845 | |
| 2846 | /* If this object was prelinked, the prelinker stored the address |
| 2847 | of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ |
| 2848 | dynamic = bfd_get_section_by_name (abfd, ".dynamic"); |
| 2849 | if (dynamic != NULL) |
| 2850 | { |
| 2851 | bfd_byte *dynbuf, *extdyn, *extdynend; |
| 2852 | size_t extdynsize; |
| 2853 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); |
| 2854 | |
| 2855 | if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) |
| 2856 | return -1; |
| 2857 | |
| 2858 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
| 2859 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
| 2860 | |
| 2861 | extdyn = dynbuf; |
| 2862 | extdynend = extdyn + dynamic->size; |
| 2863 | for (; extdyn < extdynend; extdyn += extdynsize) |
| 2864 | { |
| 2865 | Elf_Internal_Dyn dyn; |
| 2866 | (*swap_dyn_in) (abfd, extdyn, &dyn); |
| 2867 | |
| 2868 | if (dyn.d_tag == DT_NULL) |
| 2869 | break; |
| 2870 | |
| 2871 | if (dyn.d_tag == DT_PPC_GOT) |
| 2872 | { |
| 2873 | unsigned int g_o_t = dyn.d_un.d_val; |
| 2874 | asection *got = bfd_get_section_by_name (abfd, ".got"); |
| 2875 | if (got != NULL |
| 2876 | && bfd_get_section_contents (abfd, got, buf, |
| 2877 | g_o_t - got->vma + 4, 4)) |
| 2878 | glink_vma = bfd_get_32 (abfd, buf); |
| 2879 | break; |
| 2880 | } |
| 2881 | } |
| 2882 | free (dynbuf); |
| 2883 | } |
| 2884 | |
| 2885 | /* Otherwise we read the first plt entry. */ |
| 2886 | if (glink_vma == 0) |
| 2887 | { |
| 2888 | if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) |
| 2889 | glink_vma = bfd_get_32 (abfd, buf); |
| 2890 | } |
| 2891 | |
| 2892 | if (glink_vma == 0) |
| 2893 | return 0; |
| 2894 | |
| 2895 | /* The .glink section usually does not survive the final |
| 2896 | link; search for the section (usually .text) where the |
| 2897 | glink stubs now reside. */ |
| 2898 | glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); |
| 2899 | if (glink == NULL) |
| 2900 | return 0; |
| 2901 | |
| 2902 | /* Determine glink PLT resolver by reading the relative branch |
| 2903 | from the first glink stub. */ |
| 2904 | if (bfd_get_section_contents (abfd, glink, buf, |
| 2905 | glink_vma - glink->vma, 4)) |
| 2906 | { |
| 2907 | unsigned int insn = bfd_get_32 (abfd, buf); |
| 2908 | |
| 2909 | /* The first glink stub may either branch to the resolver ... */ |
| 2910 | insn ^= B; |
| 2911 | if ((insn & ~0x3fffffc) == 0) |
| 2912 | resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; |
| 2913 | |
| 2914 | /* ... or fall through a bunch of NOPs. */ |
| 2915 | else if ((insn ^ B ^ NOP) == 0) |
| 2916 | for (i = 4; |
| 2917 | bfd_get_section_contents (abfd, glink, buf, |
| 2918 | glink_vma - glink->vma + i, 4); |
| 2919 | i += 4) |
| 2920 | if (bfd_get_32 (abfd, buf) != NOP) |
| 2921 | { |
| 2922 | resolv_vma = glink_vma + i; |
| 2923 | break; |
| 2924 | } |
| 2925 | } |
| 2926 | |
| 2927 | count = relplt->size / sizeof (Elf32_External_Rela); |
| 2928 | /* If the stubs are those for -shared/-pie then we might have |
| 2929 | multiple stubs for each plt entry. If that is the case then |
| 2930 | there is no way to associate stubs with their plt entries short |
| 2931 | of figuring out the GOT pointer value used in the stub. */ |
| 2932 | if (!is_nonpic_glink_stub (abfd, glink, |
| 2933 | glink_vma - GLINK_ENTRY_SIZE - glink->vma)) |
| 2934 | return 0; |
| 2935 | |
| 2936 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| 2937 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) |
| 2938 | return -1; |
| 2939 | |
| 2940 | size = count * sizeof (asymbol); |
| 2941 | p = relplt->relocation; |
| 2942 | for (i = 0; i < count; i++, p++) |
| 2943 | { |
| 2944 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); |
| 2945 | if (p->addend != 0) |
| 2946 | size += sizeof ("+0x") - 1 + 8; |
| 2947 | } |
| 2948 | |
| 2949 | size += sizeof (asymbol) + sizeof ("__glink"); |
| 2950 | |
| 2951 | if (resolv_vma) |
| 2952 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); |
| 2953 | |
| 2954 | s = *ret = bfd_malloc (size); |
| 2955 | if (s == NULL) |
| 2956 | return -1; |
| 2957 | |
| 2958 | stub_vma = glink_vma; |
| 2959 | names = (char *) (s + count + 1 + (resolv_vma != 0)); |
| 2960 | p = relplt->relocation + count - 1; |
| 2961 | for (i = 0; i < count; i++) |
| 2962 | { |
| 2963 | size_t len; |
| 2964 | |
| 2965 | *s = **p->sym_ptr_ptr; |
| 2966 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since |
| 2967 | we are defining a symbol, ensure one of them is set. */ |
| 2968 | if ((s->flags & BSF_LOCAL) == 0) |
| 2969 | s->flags |= BSF_GLOBAL; |
| 2970 | s->flags |= BSF_SYNTHETIC; |
| 2971 | s->section = glink; |
| 2972 | stub_vma -= 16; |
| 2973 | if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0) |
| 2974 | stub_vma -= 32; |
| 2975 | s->value = stub_vma - glink->vma; |
| 2976 | s->name = names; |
| 2977 | s->udata.p = NULL; |
| 2978 | len = strlen ((*p->sym_ptr_ptr)->name); |
| 2979 | memcpy (names, (*p->sym_ptr_ptr)->name, len); |
| 2980 | names += len; |
| 2981 | if (p->addend != 0) |
| 2982 | { |
| 2983 | memcpy (names, "+0x", sizeof ("+0x") - 1); |
| 2984 | names += sizeof ("+0x") - 1; |
| 2985 | bfd_sprintf_vma (abfd, names, p->addend); |
| 2986 | names += strlen (names); |
| 2987 | } |
| 2988 | memcpy (names, "@plt", sizeof ("@plt")); |
| 2989 | names += sizeof ("@plt"); |
| 2990 | ++s; |
| 2991 | --p; |
| 2992 | } |
| 2993 | |
| 2994 | /* Add a symbol at the start of the glink branch table. */ |
| 2995 | memset (s, 0, sizeof *s); |
| 2996 | s->the_bfd = abfd; |
| 2997 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 2998 | s->section = glink; |
| 2999 | s->value = glink_vma - glink->vma; |
| 3000 | s->name = names; |
| 3001 | memcpy (names, "__glink", sizeof ("__glink")); |
| 3002 | names += sizeof ("__glink"); |
| 3003 | s++; |
| 3004 | count++; |
| 3005 | |
| 3006 | if (resolv_vma) |
| 3007 | { |
| 3008 | /* Add a symbol for the glink PLT resolver. */ |
| 3009 | memset (s, 0, sizeof *s); |
| 3010 | s->the_bfd = abfd; |
| 3011 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 3012 | s->section = glink; |
| 3013 | s->value = resolv_vma - glink->vma; |
| 3014 | s->name = names; |
| 3015 | memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); |
| 3016 | names += sizeof ("__glink_PLTresolve"); |
| 3017 | s++; |
| 3018 | count++; |
| 3019 | } |
| 3020 | |
| 3021 | return count; |
| 3022 | } |
| 3023 | \f |
| 3024 | /* The following functions are specific to the ELF linker, while |
| 3025 | functions above are used generally. They appear in this file more |
| 3026 | or less in the order in which they are called. eg. |
| 3027 | ppc_elf_check_relocs is called early in the link process, |
| 3028 | ppc_elf_finish_dynamic_sections is one of the last functions |
| 3029 | called. */ |
| 3030 | |
| 3031 | /* Track PLT entries needed for a given symbol. We might need more |
| 3032 | than one glink entry per symbol when generating a pic binary. */ |
| 3033 | struct plt_entry |
| 3034 | { |
| 3035 | struct plt_entry *next; |
| 3036 | |
| 3037 | /* -fPIC uses multiple GOT sections, one per file, called ".got2". |
| 3038 | This field stores the offset into .got2 used to initialise the |
| 3039 | GOT pointer reg. It will always be at least 32768. (Current |
| 3040 | gcc always uses an offset of 32768, but ld -r will pack .got2 |
| 3041 | sections together resulting in larger offsets). */ |
| 3042 | bfd_vma addend; |
| 3043 | |
| 3044 | /* The .got2 section. */ |
| 3045 | asection *sec; |
| 3046 | |
| 3047 | /* PLT refcount or offset. */ |
| 3048 | union |
| 3049 | { |
| 3050 | bfd_signed_vma refcount; |
| 3051 | bfd_vma offset; |
| 3052 | } plt; |
| 3053 | |
| 3054 | /* .glink stub offset. */ |
| 3055 | bfd_vma glink_offset; |
| 3056 | }; |
| 3057 | |
| 3058 | /* Of those relocs that might be copied as dynamic relocs, this function |
| 3059 | selects those that must be copied when linking a shared library, |
| 3060 | even when the symbol is local. */ |
| 3061 | |
| 3062 | static int |
| 3063 | must_be_dyn_reloc (struct bfd_link_info *info, |
| 3064 | enum elf_ppc_reloc_type r_type) |
| 3065 | { |
| 3066 | switch (r_type) |
| 3067 | { |
| 3068 | default: |
| 3069 | return 1; |
| 3070 | |
| 3071 | case R_PPC_REL24: |
| 3072 | case R_PPC_REL14: |
| 3073 | case R_PPC_REL14_BRTAKEN: |
| 3074 | case R_PPC_REL14_BRNTAKEN: |
| 3075 | case R_PPC_REL32: |
| 3076 | return 0; |
| 3077 | |
| 3078 | case R_PPC_TPREL32: |
| 3079 | case R_PPC_TPREL16: |
| 3080 | case R_PPC_TPREL16_LO: |
| 3081 | case R_PPC_TPREL16_HI: |
| 3082 | case R_PPC_TPREL16_HA: |
| 3083 | return !info->executable; |
| 3084 | } |
| 3085 | } |
| 3086 | |
| 3087 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 3088 | copying dynamic variables from a shared lib into an app's dynbss |
| 3089 | section, and instead use a dynamic relocation to point into the |
| 3090 | shared lib. */ |
| 3091 | #define ELIMINATE_COPY_RELOCS 1 |
| 3092 | |
| 3093 | /* Used to track dynamic relocations for local symbols. */ |
| 3094 | struct ppc_dyn_relocs |
| 3095 | { |
| 3096 | struct ppc_dyn_relocs *next; |
| 3097 | |
| 3098 | /* The input section of the reloc. */ |
| 3099 | asection *sec; |
| 3100 | |
| 3101 | /* Total number of relocs copied for the input section. */ |
| 3102 | unsigned int count : 31; |
| 3103 | |
| 3104 | /* Whether this entry is for STT_GNU_IFUNC symbols. */ |
| 3105 | unsigned int ifunc : 1; |
| 3106 | }; |
| 3107 | |
| 3108 | /* PPC ELF linker hash entry. */ |
| 3109 | |
| 3110 | struct ppc_elf_link_hash_entry |
| 3111 | { |
| 3112 | struct elf_link_hash_entry elf; |
| 3113 | |
| 3114 | /* If this symbol is used in the linker created sections, the processor |
| 3115 | specific backend uses this field to map the field into the offset |
| 3116 | from the beginning of the section. */ |
| 3117 | elf_linker_section_pointers_t *linker_section_pointer; |
| 3118 | |
| 3119 | /* Track dynamic relocs copied for this symbol. */ |
| 3120 | struct elf_dyn_relocs *dyn_relocs; |
| 3121 | |
| 3122 | /* Contexts in which symbol is used in the GOT (or TOC). |
| 3123 | TLS_GD .. TLS_TLS bits are or'd into the mask as the |
| 3124 | corresponding relocs are encountered during check_relocs. |
| 3125 | tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| 3126 | indicate the corresponding GOT entry type is not needed. */ |
| 3127 | #define TLS_GD 1 /* GD reloc. */ |
| 3128 | #define TLS_LD 2 /* LD reloc. */ |
| 3129 | #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| 3130 | #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| 3131 | #define TLS_TLS 16 /* Any TLS reloc. */ |
| 3132 | #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ |
| 3133 | #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ |
| 3134 | char tls_mask; |
| 3135 | |
| 3136 | /* Nonzero if we have seen a small data relocation referring to this |
| 3137 | symbol. */ |
| 3138 | unsigned char has_sda_refs; |
| 3139 | }; |
| 3140 | |
| 3141 | #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) |
| 3142 | |
| 3143 | /* PPC ELF linker hash table. */ |
| 3144 | |
| 3145 | struct ppc_elf_link_hash_table |
| 3146 | { |
| 3147 | struct elf_link_hash_table elf; |
| 3148 | |
| 3149 | /* Various options passed from the linker. */ |
| 3150 | struct ppc_elf_params *params; |
| 3151 | |
| 3152 | /* Short-cuts to get to dynamic linker sections. */ |
| 3153 | asection *got; |
| 3154 | asection *relgot; |
| 3155 | asection *glink; |
| 3156 | asection *plt; |
| 3157 | asection *relplt; |
| 3158 | asection *iplt; |
| 3159 | asection *reliplt; |
| 3160 | asection *dynbss; |
| 3161 | asection *relbss; |
| 3162 | asection *dynsbss; |
| 3163 | asection *relsbss; |
| 3164 | elf_linker_section_t sdata[2]; |
| 3165 | asection *sbss; |
| 3166 | asection *glink_eh_frame; |
| 3167 | |
| 3168 | /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ |
| 3169 | asection *srelplt2; |
| 3170 | |
| 3171 | /* The .got.plt section (VxWorks only)*/ |
| 3172 | asection *sgotplt; |
| 3173 | |
| 3174 | /* Shortcut to __tls_get_addr. */ |
| 3175 | struct elf_link_hash_entry *tls_get_addr; |
| 3176 | |
| 3177 | /* The bfd that forced an old-style PLT. */ |
| 3178 | bfd *old_bfd; |
| 3179 | |
| 3180 | /* TLS local dynamic got entry handling. */ |
| 3181 | union { |
| 3182 | bfd_signed_vma refcount; |
| 3183 | bfd_vma offset; |
| 3184 | } tlsld_got; |
| 3185 | |
| 3186 | /* Offset of branch table to PltResolve function in glink. */ |
| 3187 | bfd_vma glink_pltresolve; |
| 3188 | |
| 3189 | /* Size of reserved GOT entries. */ |
| 3190 | unsigned int got_header_size; |
| 3191 | /* Non-zero if allocating the header left a gap. */ |
| 3192 | unsigned int got_gap; |
| 3193 | |
| 3194 | /* The type of PLT we have chosen to use. */ |
| 3195 | enum ppc_elf_plt_type plt_type; |
| 3196 | |
| 3197 | /* True if the target system is VxWorks. */ |
| 3198 | unsigned int is_vxworks:1; |
| 3199 | |
| 3200 | /* The size of PLT entries. */ |
| 3201 | int plt_entry_size; |
| 3202 | /* The distance between adjacent PLT slots. */ |
| 3203 | int plt_slot_size; |
| 3204 | /* The size of the first PLT entry. */ |
| 3205 | int plt_initial_entry_size; |
| 3206 | |
| 3207 | /* Small local sym cache. */ |
| 3208 | struct sym_cache sym_cache; |
| 3209 | }; |
| 3210 | |
| 3211 | /* Rename some of the generic section flags to better document how they |
| 3212 | are used for ppc32. The flags are only valid for ppc32 elf objects. */ |
| 3213 | |
| 3214 | /* Nonzero if this section has TLS related relocations. */ |
| 3215 | #define has_tls_reloc sec_flg0 |
| 3216 | |
| 3217 | /* Nonzero if this section has a call to __tls_get_addr. */ |
| 3218 | #define has_tls_get_addr_call sec_flg1 |
| 3219 | |
| 3220 | /* Get the PPC ELF linker hash table from a link_info structure. */ |
| 3221 | |
| 3222 | #define ppc_elf_hash_table(p) \ |
| 3223 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 3224 | == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) |
| 3225 | |
| 3226 | /* Create an entry in a PPC ELF linker hash table. */ |
| 3227 | |
| 3228 | static struct bfd_hash_entry * |
| 3229 | ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 3230 | struct bfd_hash_table *table, |
| 3231 | const char *string) |
| 3232 | { |
| 3233 | /* Allocate the structure if it has not already been allocated by a |
| 3234 | subclass. */ |
| 3235 | if (entry == NULL) |
| 3236 | { |
| 3237 | entry = bfd_hash_allocate (table, |
| 3238 | sizeof (struct ppc_elf_link_hash_entry)); |
| 3239 | if (entry == NULL) |
| 3240 | return entry; |
| 3241 | } |
| 3242 | |
| 3243 | /* Call the allocation method of the superclass. */ |
| 3244 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 3245 | if (entry != NULL) |
| 3246 | { |
| 3247 | ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; |
| 3248 | ppc_elf_hash_entry (entry)->dyn_relocs = NULL; |
| 3249 | ppc_elf_hash_entry (entry)->tls_mask = 0; |
| 3250 | ppc_elf_hash_entry (entry)->has_sda_refs = 0; |
| 3251 | } |
| 3252 | |
| 3253 | return entry; |
| 3254 | } |
| 3255 | |
| 3256 | /* Create a PPC ELF linker hash table. */ |
| 3257 | |
| 3258 | static struct bfd_link_hash_table * |
| 3259 | ppc_elf_link_hash_table_create (bfd *abfd) |
| 3260 | { |
| 3261 | struct ppc_elf_link_hash_table *ret; |
| 3262 | static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 }; |
| 3263 | |
| 3264 | ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); |
| 3265 | if (ret == NULL) |
| 3266 | return NULL; |
| 3267 | |
| 3268 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 3269 | ppc_elf_link_hash_newfunc, |
| 3270 | sizeof (struct ppc_elf_link_hash_entry), |
| 3271 | PPC32_ELF_DATA)) |
| 3272 | { |
| 3273 | free (ret); |
| 3274 | return NULL; |
| 3275 | } |
| 3276 | |
| 3277 | ret->elf.init_plt_refcount.refcount = 0; |
| 3278 | ret->elf.init_plt_refcount.glist = NULL; |
| 3279 | ret->elf.init_plt_offset.offset = 0; |
| 3280 | ret->elf.init_plt_offset.glist = NULL; |
| 3281 | |
| 3282 | ret->params = &default_params; |
| 3283 | |
| 3284 | ret->sdata[0].name = ".sdata"; |
| 3285 | ret->sdata[0].sym_name = "_SDA_BASE_"; |
| 3286 | ret->sdata[0].bss_name = ".sbss"; |
| 3287 | |
| 3288 | ret->sdata[1].name = ".sdata2"; |
| 3289 | ret->sdata[1].sym_name = "_SDA2_BASE_"; |
| 3290 | ret->sdata[1].bss_name = ".sbss2"; |
| 3291 | |
| 3292 | ret->plt_entry_size = 12; |
| 3293 | ret->plt_slot_size = 8; |
| 3294 | ret->plt_initial_entry_size = 72; |
| 3295 | |
| 3296 | return &ret->elf.root; |
| 3297 | } |
| 3298 | |
| 3299 | /* Hook linker params into hash table. */ |
| 3300 | |
| 3301 | void |
| 3302 | ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params) |
| 3303 | { |
| 3304 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3305 | |
| 3306 | if (htab) |
| 3307 | htab->params = params; |
| 3308 | } |
| 3309 | |
| 3310 | /* Create .got and the related sections. */ |
| 3311 | |
| 3312 | static bfd_boolean |
| 3313 | ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) |
| 3314 | { |
| 3315 | struct ppc_elf_link_hash_table *htab; |
| 3316 | asection *s; |
| 3317 | flagword flags; |
| 3318 | |
| 3319 | if (!_bfd_elf_create_got_section (abfd, info)) |
| 3320 | return FALSE; |
| 3321 | |
| 3322 | htab = ppc_elf_hash_table (info); |
| 3323 | htab->got = s = bfd_get_linker_section (abfd, ".got"); |
| 3324 | if (s == NULL) |
| 3325 | abort (); |
| 3326 | |
| 3327 | if (htab->is_vxworks) |
| 3328 | { |
| 3329 | htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt"); |
| 3330 | if (!htab->sgotplt) |
| 3331 | abort (); |
| 3332 | } |
| 3333 | else |
| 3334 | { |
| 3335 | /* The powerpc .got has a blrl instruction in it. Mark it |
| 3336 | executable. */ |
| 3337 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS |
| 3338 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3339 | if (!bfd_set_section_flags (abfd, s, flags)) |
| 3340 | return FALSE; |
| 3341 | } |
| 3342 | |
| 3343 | htab->relgot = bfd_get_linker_section (abfd, ".rela.got"); |
| 3344 | if (!htab->relgot) |
| 3345 | abort (); |
| 3346 | |
| 3347 | return TRUE; |
| 3348 | } |
| 3349 | |
| 3350 | /* Create a special linker section, used for R_PPC_EMB_SDAI16 and |
| 3351 | R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata |
| 3352 | and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */ |
| 3353 | |
| 3354 | static bfd_boolean |
| 3355 | ppc_elf_create_linker_section (bfd *abfd, |
| 3356 | struct bfd_link_info *info, |
| 3357 | flagword flags, |
| 3358 | elf_linker_section_t *lsect) |
| 3359 | { |
| 3360 | asection *s; |
| 3361 | |
| 3362 | flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3363 | | SEC_LINKER_CREATED); |
| 3364 | |
| 3365 | s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags); |
| 3366 | if (s == NULL) |
| 3367 | return FALSE; |
| 3368 | lsect->section = s; |
| 3369 | |
| 3370 | /* Define the sym on the first section of this name. */ |
| 3371 | s = bfd_get_section_by_name (abfd, lsect->name); |
| 3372 | |
| 3373 | lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name); |
| 3374 | if (lsect->sym == NULL) |
| 3375 | return FALSE; |
| 3376 | lsect->sym->root.u.def.value = 0x8000; |
| 3377 | return TRUE; |
| 3378 | } |
| 3379 | |
| 3380 | static bfd_boolean |
| 3381 | ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) |
| 3382 | { |
| 3383 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3384 | asection *s; |
| 3385 | flagword flags; |
| 3386 | |
| 3387 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS |
| 3388 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3389 | s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); |
| 3390 | htab->glink = s; |
| 3391 | if (s == NULL |
| 3392 | || !bfd_set_section_alignment (abfd, s, |
| 3393 | htab->params->ppc476_workaround ? 6 : 4)) |
| 3394 | return FALSE; |
| 3395 | |
| 3396 | if (!info->no_ld_generated_unwind_info) |
| 3397 | { |
| 3398 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3399 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3400 | s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); |
| 3401 | htab->glink_eh_frame = s; |
| 3402 | if (s == NULL |
| 3403 | || !bfd_set_section_alignment (abfd, s, 2)) |
| 3404 | return FALSE; |
| 3405 | } |
| 3406 | |
| 3407 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
| 3408 | s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); |
| 3409 | htab->iplt = s; |
| 3410 | if (s == NULL |
| 3411 | || !bfd_set_section_alignment (abfd, s, 4)) |
| 3412 | return FALSE; |
| 3413 | |
| 3414 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3415 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3416 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); |
| 3417 | htab->reliplt = s; |
| 3418 | if (s == NULL |
| 3419 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3420 | return FALSE; |
| 3421 | |
| 3422 | if (!ppc_elf_create_linker_section (abfd, info, 0, |
| 3423 | &htab->sdata[0])) |
| 3424 | return FALSE; |
| 3425 | |
| 3426 | if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY, |
| 3427 | &htab->sdata[1])) |
| 3428 | return FALSE; |
| 3429 | |
| 3430 | return TRUE; |
| 3431 | } |
| 3432 | |
| 3433 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| 3434 | to output sections (just like _bfd_elf_create_dynamic_sections has |
| 3435 | to create .dynbss and .rela.bss). */ |
| 3436 | |
| 3437 | static bfd_boolean |
| 3438 | ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 3439 | { |
| 3440 | struct ppc_elf_link_hash_table *htab; |
| 3441 | asection *s; |
| 3442 | flagword flags; |
| 3443 | |
| 3444 | htab = ppc_elf_hash_table (info); |
| 3445 | |
| 3446 | if (htab->got == NULL |
| 3447 | && !ppc_elf_create_got (abfd, info)) |
| 3448 | return FALSE; |
| 3449 | |
| 3450 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| 3451 | return FALSE; |
| 3452 | |
| 3453 | if (htab->glink == NULL |
| 3454 | && !ppc_elf_create_glink (abfd, info)) |
| 3455 | return FALSE; |
| 3456 | |
| 3457 | htab->dynbss = bfd_get_linker_section (abfd, ".dynbss"); |
| 3458 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", |
| 3459 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 3460 | htab->dynsbss = s; |
| 3461 | if (s == NULL) |
| 3462 | return FALSE; |
| 3463 | |
| 3464 | if (! info->shared) |
| 3465 | { |
| 3466 | htab->relbss = bfd_get_linker_section (abfd, ".rela.bss"); |
| 3467 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3468 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3469 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); |
| 3470 | htab->relsbss = s; |
| 3471 | if (s == NULL |
| 3472 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3473 | return FALSE; |
| 3474 | } |
| 3475 | |
| 3476 | if (htab->is_vxworks |
| 3477 | && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) |
| 3478 | return FALSE; |
| 3479 | |
| 3480 | htab->relplt = bfd_get_linker_section (abfd, ".rela.plt"); |
| 3481 | htab->plt = s = bfd_get_linker_section (abfd, ".plt"); |
| 3482 | if (s == NULL) |
| 3483 | abort (); |
| 3484 | |
| 3485 | flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; |
| 3486 | if (htab->plt_type == PLT_VXWORKS) |
| 3487 | /* The VxWorks PLT is a loaded section with contents. */ |
| 3488 | flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; |
| 3489 | return bfd_set_section_flags (abfd, s, flags); |
| 3490 | } |
| 3491 | |
| 3492 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 3493 | |
| 3494 | static void |
| 3495 | ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 3496 | struct elf_link_hash_entry *dir, |
| 3497 | struct elf_link_hash_entry *ind) |
| 3498 | { |
| 3499 | struct ppc_elf_link_hash_entry *edir, *eind; |
| 3500 | |
| 3501 | edir = (struct ppc_elf_link_hash_entry *) dir; |
| 3502 | eind = (struct ppc_elf_link_hash_entry *) ind; |
| 3503 | |
| 3504 | edir->tls_mask |= eind->tls_mask; |
| 3505 | edir->has_sda_refs |= eind->has_sda_refs; |
| 3506 | |
| 3507 | /* If called to transfer flags for a weakdef during processing |
| 3508 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. |
| 3509 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 3510 | if (!(ELIMINATE_COPY_RELOCS |
| 3511 | && eind->elf.root.type != bfd_link_hash_indirect |
| 3512 | && edir->elf.dynamic_adjusted)) |
| 3513 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
| 3514 | |
| 3515 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
| 3516 | edir->elf.ref_regular |= eind->elf.ref_regular; |
| 3517 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; |
| 3518 | edir->elf.needs_plt |= eind->elf.needs_plt; |
| 3519 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; |
| 3520 | |
| 3521 | if (eind->dyn_relocs != NULL) |
| 3522 | { |
| 3523 | if (edir->dyn_relocs != NULL) |
| 3524 | { |
| 3525 | struct elf_dyn_relocs **pp; |
| 3526 | struct elf_dyn_relocs *p; |
| 3527 | |
| 3528 | /* Add reloc counts against the indirect sym to the direct sym |
| 3529 | list. Merge any entries against the same section. */ |
| 3530 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 3531 | { |
| 3532 | struct elf_dyn_relocs *q; |
| 3533 | |
| 3534 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 3535 | if (q->sec == p->sec) |
| 3536 | { |
| 3537 | q->pc_count += p->pc_count; |
| 3538 | q->count += p->count; |
| 3539 | *pp = p->next; |
| 3540 | break; |
| 3541 | } |
| 3542 | if (q == NULL) |
| 3543 | pp = &p->next; |
| 3544 | } |
| 3545 | *pp = edir->dyn_relocs; |
| 3546 | } |
| 3547 | |
| 3548 | edir->dyn_relocs = eind->dyn_relocs; |
| 3549 | eind->dyn_relocs = NULL; |
| 3550 | } |
| 3551 | |
| 3552 | /* If we were called to copy over info for a weak sym, that's all. |
| 3553 | You might think dyn_relocs need not be copied over; After all, |
| 3554 | both syms will be dynamic or both non-dynamic so we're just |
| 3555 | moving reloc accounting around. However, ELIMINATE_COPY_RELOCS |
| 3556 | code in ppc_elf_adjust_dynamic_symbol needs to check for |
| 3557 | dyn_relocs in read-only sections, and it does so on what is the |
| 3558 | DIR sym here. */ |
| 3559 | if (eind->elf.root.type != bfd_link_hash_indirect) |
| 3560 | return; |
| 3561 | |
| 3562 | /* Copy over the GOT refcount entries that we may have already seen to |
| 3563 | the symbol which just became indirect. */ |
| 3564 | edir->elf.got.refcount += eind->elf.got.refcount; |
| 3565 | eind->elf.got.refcount = 0; |
| 3566 | |
| 3567 | /* And plt entries. */ |
| 3568 | if (eind->elf.plt.plist != NULL) |
| 3569 | { |
| 3570 | if (edir->elf.plt.plist != NULL) |
| 3571 | { |
| 3572 | struct plt_entry **entp; |
| 3573 | struct plt_entry *ent; |
| 3574 | |
| 3575 | for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) |
| 3576 | { |
| 3577 | struct plt_entry *dent; |
| 3578 | |
| 3579 | for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) |
| 3580 | if (dent->sec == ent->sec && dent->addend == ent->addend) |
| 3581 | { |
| 3582 | dent->plt.refcount += ent->plt.refcount; |
| 3583 | *entp = ent->next; |
| 3584 | break; |
| 3585 | } |
| 3586 | if (dent == NULL) |
| 3587 | entp = &ent->next; |
| 3588 | } |
| 3589 | *entp = edir->elf.plt.plist; |
| 3590 | } |
| 3591 | |
| 3592 | edir->elf.plt.plist = eind->elf.plt.plist; |
| 3593 | eind->elf.plt.plist = NULL; |
| 3594 | } |
| 3595 | |
| 3596 | if (eind->elf.dynindx != -1) |
| 3597 | { |
| 3598 | if (edir->elf.dynindx != -1) |
| 3599 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 3600 | edir->elf.dynstr_index); |
| 3601 | edir->elf.dynindx = eind->elf.dynindx; |
| 3602 | edir->elf.dynstr_index = eind->elf.dynstr_index; |
| 3603 | eind->elf.dynindx = -1; |
| 3604 | eind->elf.dynstr_index = 0; |
| 3605 | } |
| 3606 | } |
| 3607 | |
| 3608 | /* Hook called by the linker routine which adds symbols from an object |
| 3609 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 3610 | |
| 3611 | static bfd_boolean |
| 3612 | ppc_elf_add_symbol_hook (bfd *abfd, |
| 3613 | struct bfd_link_info *info, |
| 3614 | Elf_Internal_Sym *sym, |
| 3615 | const char **namep ATTRIBUTE_UNUSED, |
| 3616 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 3617 | asection **secp, |
| 3618 | bfd_vma *valp) |
| 3619 | { |
| 3620 | if (sym->st_shndx == SHN_COMMON |
| 3621 | && !info->relocatable |
| 3622 | && is_ppc_elf (info->output_bfd) |
| 3623 | && sym->st_size <= elf_gp_size (abfd)) |
| 3624 | { |
| 3625 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 3626 | put into .sbss. */ |
| 3627 | struct ppc_elf_link_hash_table *htab; |
| 3628 | |
| 3629 | htab = ppc_elf_hash_table (info); |
| 3630 | if (htab->sbss == NULL) |
| 3631 | { |
| 3632 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; |
| 3633 | |
| 3634 | if (!htab->elf.dynobj) |
| 3635 | htab->elf.dynobj = abfd; |
| 3636 | |
| 3637 | htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 3638 | ".sbss", |
| 3639 | flags); |
| 3640 | if (htab->sbss == NULL) |
| 3641 | return FALSE; |
| 3642 | } |
| 3643 | |
| 3644 | *secp = htab->sbss; |
| 3645 | *valp = sym->st_size; |
| 3646 | } |
| 3647 | |
| 3648 | if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
| 3649 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE) |
| 3650 | && (abfd->flags & DYNAMIC) == 0 |
| 3651 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) |
| 3652 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; |
| 3653 | |
| 3654 | return TRUE; |
| 3655 | } |
| 3656 | \f |
| 3657 | /* Find a linker generated pointer with a given addend and type. */ |
| 3658 | |
| 3659 | static elf_linker_section_pointers_t * |
| 3660 | elf_find_pointer_linker_section |
| 3661 | (elf_linker_section_pointers_t *linker_pointers, |
| 3662 | bfd_vma addend, |
| 3663 | elf_linker_section_t *lsect) |
| 3664 | { |
| 3665 | for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) |
| 3666 | if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) |
| 3667 | return linker_pointers; |
| 3668 | |
| 3669 | return NULL; |
| 3670 | } |
| 3671 | |
| 3672 | /* Allocate a pointer to live in a linker created section. */ |
| 3673 | |
| 3674 | static bfd_boolean |
| 3675 | elf_allocate_pointer_linker_section (bfd *abfd, |
| 3676 | elf_linker_section_t *lsect, |
| 3677 | struct elf_link_hash_entry *h, |
| 3678 | const Elf_Internal_Rela *rel) |
| 3679 | { |
| 3680 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; |
| 3681 | elf_linker_section_pointers_t *linker_section_ptr; |
| 3682 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 3683 | bfd_size_type amt; |
| 3684 | |
| 3685 | BFD_ASSERT (lsect != NULL); |
| 3686 | |
| 3687 | /* Is this a global symbol? */ |
| 3688 | if (h != NULL) |
| 3689 | { |
| 3690 | struct ppc_elf_link_hash_entry *eh; |
| 3691 | |
| 3692 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 3693 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 3694 | if (elf_find_pointer_linker_section (eh->linker_section_pointer, |
| 3695 | rel->r_addend, |
| 3696 | lsect)) |
| 3697 | return TRUE; |
| 3698 | |
| 3699 | ptr_linker_section_ptr = &eh->linker_section_pointer; |
| 3700 | } |
| 3701 | else |
| 3702 | { |
| 3703 | BFD_ASSERT (is_ppc_elf (abfd)); |
| 3704 | |
| 3705 | /* Allocation of a pointer to a local symbol. */ |
| 3706 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
| 3707 | |
| 3708 | /* Allocate a table to hold the local symbols if first time. */ |
| 3709 | if (!ptr) |
| 3710 | { |
| 3711 | unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; |
| 3712 | |
| 3713 | amt = num_symbols; |
| 3714 | amt *= sizeof (elf_linker_section_pointers_t *); |
| 3715 | ptr = bfd_zalloc (abfd, amt); |
| 3716 | |
| 3717 | if (!ptr) |
| 3718 | return FALSE; |
| 3719 | |
| 3720 | elf_local_ptr_offsets (abfd) = ptr; |
| 3721 | } |
| 3722 | |
| 3723 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 3724 | if (elf_find_pointer_linker_section (ptr[r_symndx], |
| 3725 | rel->r_addend, |
| 3726 | lsect)) |
| 3727 | return TRUE; |
| 3728 | |
| 3729 | ptr_linker_section_ptr = &ptr[r_symndx]; |
| 3730 | } |
| 3731 | |
| 3732 | /* Allocate space for a pointer in the linker section, and allocate |
| 3733 | a new pointer record from internal memory. */ |
| 3734 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
| 3735 | amt = sizeof (elf_linker_section_pointers_t); |
| 3736 | linker_section_ptr = bfd_alloc (abfd, amt); |
| 3737 | |
| 3738 | if (!linker_section_ptr) |
| 3739 | return FALSE; |
| 3740 | |
| 3741 | linker_section_ptr->next = *ptr_linker_section_ptr; |
| 3742 | linker_section_ptr->addend = rel->r_addend; |
| 3743 | linker_section_ptr->lsect = lsect; |
| 3744 | *ptr_linker_section_ptr = linker_section_ptr; |
| 3745 | |
| 3746 | if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2)) |
| 3747 | return FALSE; |
| 3748 | linker_section_ptr->offset = lsect->section->size; |
| 3749 | lsect->section->size += 4; |
| 3750 | |
| 3751 | #ifdef DEBUG |
| 3752 | fprintf (stderr, |
| 3753 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", |
| 3754 | lsect->name, (long) linker_section_ptr->offset, |
| 3755 | (long) lsect->section->size); |
| 3756 | #endif |
| 3757 | |
| 3758 | return TRUE; |
| 3759 | } |
| 3760 | |
| 3761 | static struct plt_entry ** |
| 3762 | update_local_sym_info (bfd *abfd, |
| 3763 | Elf_Internal_Shdr *symtab_hdr, |
| 3764 | unsigned long r_symndx, |
| 3765 | int tls_type) |
| 3766 | { |
| 3767 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3768 | struct plt_entry **local_plt; |
| 3769 | char *local_got_tls_masks; |
| 3770 | |
| 3771 | if (local_got_refcounts == NULL) |
| 3772 | { |
| 3773 | bfd_size_type size = symtab_hdr->sh_info; |
| 3774 | |
| 3775 | size *= (sizeof (*local_got_refcounts) |
| 3776 | + sizeof (*local_plt) |
| 3777 | + sizeof (*local_got_tls_masks)); |
| 3778 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 3779 | if (local_got_refcounts == NULL) |
| 3780 | return NULL; |
| 3781 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 3782 | } |
| 3783 | |
| 3784 | local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); |
| 3785 | local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 3786 | local_got_tls_masks[r_symndx] |= tls_type; |
| 3787 | if (tls_type != PLT_IFUNC) |
| 3788 | local_got_refcounts[r_symndx] += 1; |
| 3789 | return local_plt + r_symndx; |
| 3790 | } |
| 3791 | |
| 3792 | static bfd_boolean |
| 3793 | update_plt_info (bfd *abfd, struct plt_entry **plist, |
| 3794 | asection *sec, bfd_vma addend) |
| 3795 | { |
| 3796 | struct plt_entry *ent; |
| 3797 | |
| 3798 | if (addend < 32768) |
| 3799 | sec = NULL; |
| 3800 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 3801 | if (ent->sec == sec && ent->addend == addend) |
| 3802 | break; |
| 3803 | if (ent == NULL) |
| 3804 | { |
| 3805 | bfd_size_type amt = sizeof (*ent); |
| 3806 | ent = bfd_alloc (abfd, amt); |
| 3807 | if (ent == NULL) |
| 3808 | return FALSE; |
| 3809 | ent->next = *plist; |
| 3810 | ent->sec = sec; |
| 3811 | ent->addend = addend; |
| 3812 | ent->plt.refcount = 0; |
| 3813 | *plist = ent; |
| 3814 | } |
| 3815 | ent->plt.refcount += 1; |
| 3816 | return TRUE; |
| 3817 | } |
| 3818 | |
| 3819 | static struct plt_entry * |
| 3820 | find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) |
| 3821 | { |
| 3822 | struct plt_entry *ent; |
| 3823 | |
| 3824 | if (addend < 32768) |
| 3825 | sec = NULL; |
| 3826 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 3827 | if (ent->sec == sec && ent->addend == addend) |
| 3828 | break; |
| 3829 | return ent; |
| 3830 | } |
| 3831 | |
| 3832 | static bfd_boolean |
| 3833 | is_branch_reloc (enum elf_ppc_reloc_type r_type) |
| 3834 | { |
| 3835 | return (r_type == R_PPC_PLTREL24 |
| 3836 | || r_type == R_PPC_LOCAL24PC |
| 3837 | || r_type == R_PPC_REL24 |
| 3838 | || r_type == R_PPC_REL14 |
| 3839 | || r_type == R_PPC_REL14_BRTAKEN |
| 3840 | || r_type == R_PPC_REL14_BRNTAKEN |
| 3841 | || r_type == R_PPC_ADDR24 |
| 3842 | || r_type == R_PPC_ADDR14 |
| 3843 | || r_type == R_PPC_ADDR14_BRTAKEN |
| 3844 | || r_type == R_PPC_ADDR14_BRNTAKEN); |
| 3845 | } |
| 3846 | |
| 3847 | static void |
| 3848 | bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) |
| 3849 | { |
| 3850 | (*_bfd_error_handler) |
| 3851 | (_("%B: relocation %s cannot be used when making a shared object"), |
| 3852 | abfd, |
| 3853 | ppc_elf_howto_table[r_type]->name); |
| 3854 | bfd_set_error (bfd_error_bad_value); |
| 3855 | } |
| 3856 | |
| 3857 | /* Look through the relocs for a section during the first phase, and |
| 3858 | allocate space in the global offset table or procedure linkage |
| 3859 | table. */ |
| 3860 | |
| 3861 | static bfd_boolean |
| 3862 | ppc_elf_check_relocs (bfd *abfd, |
| 3863 | struct bfd_link_info *info, |
| 3864 | asection *sec, |
| 3865 | const Elf_Internal_Rela *relocs) |
| 3866 | { |
| 3867 | struct ppc_elf_link_hash_table *htab; |
| 3868 | Elf_Internal_Shdr *symtab_hdr; |
| 3869 | struct elf_link_hash_entry **sym_hashes; |
| 3870 | const Elf_Internal_Rela *rel; |
| 3871 | const Elf_Internal_Rela *rel_end; |
| 3872 | asection *got2, *sreloc; |
| 3873 | struct elf_link_hash_entry *tga; |
| 3874 | |
| 3875 | if (info->relocatable) |
| 3876 | return TRUE; |
| 3877 | |
| 3878 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 3879 | In particular, any relocs in such sections should not affect GOT |
| 3880 | and PLT reference counting (ie. we don't allow them to create GOT |
| 3881 | or PLT entries), there's no possibility or desire to optimize TLS |
| 3882 | relocs, and there's not much point in propagating relocs to shared |
| 3883 | libs that the dynamic linker won't relocate. */ |
| 3884 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3885 | return TRUE; |
| 3886 | |
| 3887 | #ifdef DEBUG |
| 3888 | _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", |
| 3889 | sec, abfd); |
| 3890 | #endif |
| 3891 | |
| 3892 | BFD_ASSERT (is_ppc_elf (abfd)); |
| 3893 | |
| 3894 | /* Initialize howto table if not already done. */ |
| 3895 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 3896 | ppc_elf_howto_init (); |
| 3897 | |
| 3898 | htab = ppc_elf_hash_table (info); |
| 3899 | if (htab->glink == NULL) |
| 3900 | { |
| 3901 | if (htab->elf.dynobj == NULL) |
| 3902 | htab->elf.dynobj = abfd; |
| 3903 | if (!ppc_elf_create_glink (htab->elf.dynobj, info)) |
| 3904 | return FALSE; |
| 3905 | } |
| 3906 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 3907 | FALSE, FALSE, TRUE); |
| 3908 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 3909 | sym_hashes = elf_sym_hashes (abfd); |
| 3910 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 3911 | sreloc = NULL; |
| 3912 | |
| 3913 | rel_end = relocs + sec->reloc_count; |
| 3914 | for (rel = relocs; rel < rel_end; rel++) |
| 3915 | { |
| 3916 | unsigned long r_symndx; |
| 3917 | enum elf_ppc_reloc_type r_type; |
| 3918 | struct elf_link_hash_entry *h; |
| 3919 | int tls_type; |
| 3920 | |
| 3921 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3922 | if (r_symndx < symtab_hdr->sh_info) |
| 3923 | h = NULL; |
| 3924 | else |
| 3925 | { |
| 3926 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3927 | while (h->root.type == bfd_link_hash_indirect |
| 3928 | || h->root.type == bfd_link_hash_warning) |
| 3929 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3930 | |
| 3931 | /* PR15323, ref flags aren't set for references in the same |
| 3932 | object. */ |
| 3933 | h->root.non_ir_ref = 1; |
| 3934 | } |
| 3935 | |
| 3936 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 3937 | This shows up in particular in an R_PPC_ADDR32 in the eabi |
| 3938 | startup code. */ |
| 3939 | if (h != NULL |
| 3940 | && htab->got == NULL |
| 3941 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3942 | { |
| 3943 | if (htab->elf.dynobj == NULL) |
| 3944 | htab->elf.dynobj = abfd; |
| 3945 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 3946 | return FALSE; |
| 3947 | BFD_ASSERT (h == htab->elf.hgot); |
| 3948 | } |
| 3949 | |
| 3950 | tls_type = 0; |
| 3951 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3952 | if (h == NULL && !htab->is_vxworks) |
| 3953 | { |
| 3954 | Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 3955 | abfd, r_symndx); |
| 3956 | if (isym == NULL) |
| 3957 | return FALSE; |
| 3958 | |
| 3959 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 3960 | { |
| 3961 | struct plt_entry **ifunc; |
| 3962 | |
| 3963 | /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ |
| 3964 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 3965 | PLT_IFUNC); |
| 3966 | if (ifunc == NULL) |
| 3967 | return FALSE; |
| 3968 | |
| 3969 | /* STT_GNU_IFUNC symbols must have a PLT entry; |
| 3970 | In a non-pie executable even when there are |
| 3971 | no plt calls. */ |
| 3972 | if (!info->shared |
| 3973 | || is_branch_reloc (r_type)) |
| 3974 | { |
| 3975 | bfd_vma addend = 0; |
| 3976 | if (r_type == R_PPC_PLTREL24) |
| 3977 | { |
| 3978 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
| 3979 | if (info->shared) |
| 3980 | addend = rel->r_addend; |
| 3981 | } |
| 3982 | if (!update_plt_info (abfd, ifunc, got2, addend)) |
| 3983 | return FALSE; |
| 3984 | } |
| 3985 | } |
| 3986 | } |
| 3987 | |
| 3988 | if (!htab->is_vxworks |
| 3989 | && is_branch_reloc (r_type) |
| 3990 | && h != NULL |
| 3991 | && h == tga) |
| 3992 | { |
| 3993 | if (rel != relocs |
| 3994 | && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD |
| 3995 | || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) |
| 3996 | /* We have a new-style __tls_get_addr call with a marker |
| 3997 | reloc. */ |
| 3998 | ; |
| 3999 | else |
| 4000 | /* Mark this section as having an old-style call. */ |
| 4001 | sec->has_tls_get_addr_call = 1; |
| 4002 | } |
| 4003 | |
| 4004 | switch (r_type) |
| 4005 | { |
| 4006 | case R_PPC_TLSGD: |
| 4007 | case R_PPC_TLSLD: |
| 4008 | /* These special tls relocs tie a call to __tls_get_addr with |
| 4009 | its parameter symbol. */ |
| 4010 | break; |
| 4011 | |
| 4012 | case R_PPC_GOT_TLSLD16: |
| 4013 | case R_PPC_GOT_TLSLD16_LO: |
| 4014 | case R_PPC_GOT_TLSLD16_HI: |
| 4015 | case R_PPC_GOT_TLSLD16_HA: |
| 4016 | tls_type = TLS_TLS | TLS_LD; |
| 4017 | goto dogottls; |
| 4018 | |
| 4019 | case R_PPC_GOT_TLSGD16: |
| 4020 | case R_PPC_GOT_TLSGD16_LO: |
| 4021 | case R_PPC_GOT_TLSGD16_HI: |
| 4022 | case R_PPC_GOT_TLSGD16_HA: |
| 4023 | tls_type = TLS_TLS | TLS_GD; |
| 4024 | goto dogottls; |
| 4025 | |
| 4026 | case R_PPC_GOT_TPREL16: |
| 4027 | case R_PPC_GOT_TPREL16_LO: |
| 4028 | case R_PPC_GOT_TPREL16_HI: |
| 4029 | case R_PPC_GOT_TPREL16_HA: |
| 4030 | if (info->shared) |
| 4031 | info->flags |= DF_STATIC_TLS; |
| 4032 | tls_type = TLS_TLS | TLS_TPREL; |
| 4033 | goto dogottls; |
| 4034 | |
| 4035 | case R_PPC_GOT_DTPREL16: |
| 4036 | case R_PPC_GOT_DTPREL16_LO: |
| 4037 | case R_PPC_GOT_DTPREL16_HI: |
| 4038 | case R_PPC_GOT_DTPREL16_HA: |
| 4039 | tls_type = TLS_TLS | TLS_DTPREL; |
| 4040 | dogottls: |
| 4041 | sec->has_tls_reloc = 1; |
| 4042 | /* Fall thru */ |
| 4043 | |
| 4044 | /* GOT16 relocations */ |
| 4045 | case R_PPC_GOT16: |
| 4046 | case R_PPC_GOT16_LO: |
| 4047 | case R_PPC_GOT16_HI: |
| 4048 | case R_PPC_GOT16_HA: |
| 4049 | /* This symbol requires a global offset table entry. */ |
| 4050 | if (htab->got == NULL) |
| 4051 | { |
| 4052 | if (htab->elf.dynobj == NULL) |
| 4053 | htab->elf.dynobj = abfd; |
| 4054 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 4055 | return FALSE; |
| 4056 | } |
| 4057 | if (h != NULL) |
| 4058 | { |
| 4059 | h->got.refcount += 1; |
| 4060 | ppc_elf_hash_entry (h)->tls_mask |= tls_type; |
| 4061 | } |
| 4062 | else |
| 4063 | /* This is a global offset table entry for a local symbol. */ |
| 4064 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) |
| 4065 | return FALSE; |
| 4066 | |
| 4067 | /* We may also need a plt entry if the symbol turns out to be |
| 4068 | an ifunc. */ |
| 4069 | if (h != NULL && !info->shared) |
| 4070 | { |
| 4071 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4072 | return FALSE; |
| 4073 | } |
| 4074 | break; |
| 4075 | |
| 4076 | /* Indirect .sdata relocation. */ |
| 4077 | case R_PPC_EMB_SDAI16: |
| 4078 | if (info->shared) |
| 4079 | { |
| 4080 | bad_shared_reloc (abfd, r_type); |
| 4081 | return FALSE; |
| 4082 | } |
| 4083 | htab->sdata[0].sym->ref_regular = 1; |
| 4084 | if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0], |
| 4085 | h, rel)) |
| 4086 | return FALSE; |
| 4087 | if (h != NULL) |
| 4088 | { |
| 4089 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4090 | h->non_got_ref = TRUE; |
| 4091 | } |
| 4092 | break; |
| 4093 | |
| 4094 | /* Indirect .sdata2 relocation. */ |
| 4095 | case R_PPC_EMB_SDA2I16: |
| 4096 | if (info->shared) |
| 4097 | { |
| 4098 | bad_shared_reloc (abfd, r_type); |
| 4099 | return FALSE; |
| 4100 | } |
| 4101 | htab->sdata[1].sym->ref_regular = 1; |
| 4102 | if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1], |
| 4103 | h, rel)) |
| 4104 | return FALSE; |
| 4105 | if (h != NULL) |
| 4106 | { |
| 4107 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4108 | h->non_got_ref = TRUE; |
| 4109 | } |
| 4110 | break; |
| 4111 | |
| 4112 | case R_PPC_SDAREL16: |
| 4113 | htab->sdata[0].sym->ref_regular = 1; |
| 4114 | /* Fall thru */ |
| 4115 | |
| 4116 | case R_PPC_VLE_SDAREL_LO16A: |
| 4117 | case R_PPC_VLE_SDAREL_LO16D: |
| 4118 | case R_PPC_VLE_SDAREL_HI16A: |
| 4119 | case R_PPC_VLE_SDAREL_HI16D: |
| 4120 | case R_PPC_VLE_SDAREL_HA16A: |
| 4121 | case R_PPC_VLE_SDAREL_HA16D: |
| 4122 | if (h != NULL) |
| 4123 | { |
| 4124 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4125 | h->non_got_ref = TRUE; |
| 4126 | } |
| 4127 | break; |
| 4128 | |
| 4129 | case R_PPC_VLE_REL8: |
| 4130 | case R_PPC_VLE_REL15: |
| 4131 | case R_PPC_VLE_REL24: |
| 4132 | case R_PPC_VLE_LO16A: |
| 4133 | case R_PPC_VLE_LO16D: |
| 4134 | case R_PPC_VLE_HI16A: |
| 4135 | case R_PPC_VLE_HI16D: |
| 4136 | case R_PPC_VLE_HA16A: |
| 4137 | case R_PPC_VLE_HA16D: |
| 4138 | break; |
| 4139 | |
| 4140 | case R_PPC_EMB_SDA2REL: |
| 4141 | if (info->shared) |
| 4142 | { |
| 4143 | bad_shared_reloc (abfd, r_type); |
| 4144 | return FALSE; |
| 4145 | } |
| 4146 | htab->sdata[1].sym->ref_regular = 1; |
| 4147 | if (h != NULL) |
| 4148 | { |
| 4149 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4150 | h->non_got_ref = TRUE; |
| 4151 | } |
| 4152 | break; |
| 4153 | |
| 4154 | case R_PPC_VLE_SDA21_LO: |
| 4155 | case R_PPC_VLE_SDA21: |
| 4156 | case R_PPC_EMB_SDA21: |
| 4157 | case R_PPC_EMB_RELSDA: |
| 4158 | if (info->shared) |
| 4159 | { |
| 4160 | bad_shared_reloc (abfd, r_type); |
| 4161 | return FALSE; |
| 4162 | } |
| 4163 | if (h != NULL) |
| 4164 | { |
| 4165 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4166 | h->non_got_ref = TRUE; |
| 4167 | } |
| 4168 | break; |
| 4169 | |
| 4170 | case R_PPC_EMB_NADDR32: |
| 4171 | case R_PPC_EMB_NADDR16: |
| 4172 | case R_PPC_EMB_NADDR16_LO: |
| 4173 | case R_PPC_EMB_NADDR16_HI: |
| 4174 | case R_PPC_EMB_NADDR16_HA: |
| 4175 | if (info->shared) |
| 4176 | { |
| 4177 | bad_shared_reloc (abfd, r_type); |
| 4178 | return FALSE; |
| 4179 | } |
| 4180 | if (h != NULL) |
| 4181 | h->non_got_ref = TRUE; |
| 4182 | break; |
| 4183 | |
| 4184 | case R_PPC_PLTREL24: |
| 4185 | if (h == NULL) |
| 4186 | break; |
| 4187 | /* Fall through */ |
| 4188 | case R_PPC_PLT32: |
| 4189 | case R_PPC_PLTREL32: |
| 4190 | case R_PPC_PLT16_LO: |
| 4191 | case R_PPC_PLT16_HI: |
| 4192 | case R_PPC_PLT16_HA: |
| 4193 | #ifdef DEBUG |
| 4194 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 4195 | #endif |
| 4196 | /* This symbol requires a procedure linkage table entry. We |
| 4197 | actually build the entry in finish_dynamic_symbol, |
| 4198 | because this might be a case of linking PIC code without |
| 4199 | linking in any dynamic objects, in which case we don't |
| 4200 | need to generate a procedure linkage table after all. */ |
| 4201 | |
| 4202 | if (h == NULL) |
| 4203 | { |
| 4204 | /* It does not make sense to have a procedure linkage |
| 4205 | table entry for a local symbol. */ |
| 4206 | info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"), |
| 4207 | abfd, sec, rel->r_offset, |
| 4208 | ppc_elf_howto_table[r_type]->name); |
| 4209 | bfd_set_error (bfd_error_bad_value); |
| 4210 | return FALSE; |
| 4211 | } |
| 4212 | else |
| 4213 | { |
| 4214 | bfd_vma addend = 0; |
| 4215 | |
| 4216 | if (r_type == R_PPC_PLTREL24) |
| 4217 | { |
| 4218 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
| 4219 | if (info->shared) |
| 4220 | addend = rel->r_addend; |
| 4221 | } |
| 4222 | h->needs_plt = 1; |
| 4223 | if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) |
| 4224 | return FALSE; |
| 4225 | } |
| 4226 | break; |
| 4227 | |
| 4228 | /* The following relocations don't need to propagate the |
| 4229 | relocation if linking a shared object since they are |
| 4230 | section relative. */ |
| 4231 | case R_PPC_SECTOFF: |
| 4232 | case R_PPC_SECTOFF_LO: |
| 4233 | case R_PPC_SECTOFF_HI: |
| 4234 | case R_PPC_SECTOFF_HA: |
| 4235 | case R_PPC_DTPREL16: |
| 4236 | case R_PPC_DTPREL16_LO: |
| 4237 | case R_PPC_DTPREL16_HI: |
| 4238 | case R_PPC_DTPREL16_HA: |
| 4239 | case R_PPC_TOC16: |
| 4240 | break; |
| 4241 | |
| 4242 | case R_PPC_REL16: |
| 4243 | case R_PPC_REL16_LO: |
| 4244 | case R_PPC_REL16_HI: |
| 4245 | case R_PPC_REL16_HA: |
| 4246 | ppc_elf_tdata (abfd)->has_rel16 = 1; |
| 4247 | break; |
| 4248 | |
| 4249 | /* These are just markers. */ |
| 4250 | case R_PPC_TLS: |
| 4251 | case R_PPC_EMB_MRKREF: |
| 4252 | case R_PPC_NONE: |
| 4253 | case R_PPC_max: |
| 4254 | case R_PPC_RELAX: |
| 4255 | case R_PPC_RELAX_PLT: |
| 4256 | case R_PPC_RELAX_PLTREL24: |
| 4257 | break; |
| 4258 | |
| 4259 | /* These should only appear in dynamic objects. */ |
| 4260 | case R_PPC_COPY: |
| 4261 | case R_PPC_GLOB_DAT: |
| 4262 | case R_PPC_JMP_SLOT: |
| 4263 | case R_PPC_RELATIVE: |
| 4264 | case R_PPC_IRELATIVE: |
| 4265 | break; |
| 4266 | |
| 4267 | /* These aren't handled yet. We'll report an error later. */ |
| 4268 | case R_PPC_ADDR30: |
| 4269 | case R_PPC_EMB_RELSEC16: |
| 4270 | case R_PPC_EMB_RELST_LO: |
| 4271 | case R_PPC_EMB_RELST_HI: |
| 4272 | case R_PPC_EMB_RELST_HA: |
| 4273 | case R_PPC_EMB_BIT_FLD: |
| 4274 | break; |
| 4275 | |
| 4276 | /* This refers only to functions defined in the shared library. */ |
| 4277 | case R_PPC_LOCAL24PC: |
| 4278 | if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) |
| 4279 | { |
| 4280 | htab->plt_type = PLT_OLD; |
| 4281 | htab->old_bfd = abfd; |
| 4282 | } |
| 4283 | if (h != NULL && h->type == STT_GNU_IFUNC) |
| 4284 | { |
| 4285 | if (info->shared) |
| 4286 | { |
| 4287 | info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"), |
| 4288 | abfd, sec, rel->r_offset, |
| 4289 | h->root.root.string); |
| 4290 | bfd_set_error (bfd_error_bad_value); |
| 4291 | return FALSE; |
| 4292 | } |
| 4293 | h->needs_plt = 1; |
| 4294 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4295 | return FALSE; |
| 4296 | } |
| 4297 | break; |
| 4298 | |
| 4299 | /* This relocation describes the C++ object vtable hierarchy. |
| 4300 | Reconstruct it for later use during GC. */ |
| 4301 | case R_PPC_GNU_VTINHERIT: |
| 4302 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 4303 | return FALSE; |
| 4304 | break; |
| 4305 | |
| 4306 | /* This relocation describes which C++ vtable entries are actually |
| 4307 | used. Record for later use during GC. */ |
| 4308 | case R_PPC_GNU_VTENTRY: |
| 4309 | BFD_ASSERT (h != NULL); |
| 4310 | if (h != NULL |
| 4311 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 4312 | return FALSE; |
| 4313 | break; |
| 4314 | |
| 4315 | /* We shouldn't really be seeing these. */ |
| 4316 | case R_PPC_TPREL32: |
| 4317 | case R_PPC_TPREL16: |
| 4318 | case R_PPC_TPREL16_LO: |
| 4319 | case R_PPC_TPREL16_HI: |
| 4320 | case R_PPC_TPREL16_HA: |
| 4321 | if (info->shared) |
| 4322 | info->flags |= DF_STATIC_TLS; |
| 4323 | goto dodyn; |
| 4324 | |
| 4325 | /* Nor these. */ |
| 4326 | case R_PPC_DTPMOD32: |
| 4327 | case R_PPC_DTPREL32: |
| 4328 | goto dodyn; |
| 4329 | |
| 4330 | case R_PPC_REL32: |
| 4331 | if (h == NULL |
| 4332 | && got2 != NULL |
| 4333 | && (sec->flags & SEC_CODE) != 0 |
| 4334 | && info->shared |
| 4335 | && htab->plt_type == PLT_UNSET) |
| 4336 | { |
| 4337 | /* Old -fPIC gcc code has .long LCTOC1-LCFx just before |
| 4338 | the start of a function, which assembles to a REL32 |
| 4339 | reference to .got2. If we detect one of these, then |
| 4340 | force the old PLT layout because the linker cannot |
| 4341 | reliably deduce the GOT pointer value needed for |
| 4342 | PLT call stubs. */ |
| 4343 | asection *s; |
| 4344 | Elf_Internal_Sym *isym; |
| 4345 | |
| 4346 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4347 | abfd, r_symndx); |
| 4348 | if (isym == NULL) |
| 4349 | return FALSE; |
| 4350 | |
| 4351 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4352 | if (s == got2) |
| 4353 | { |
| 4354 | htab->plt_type = PLT_OLD; |
| 4355 | htab->old_bfd = abfd; |
| 4356 | } |
| 4357 | } |
| 4358 | if (h == NULL || h == htab->elf.hgot) |
| 4359 | break; |
| 4360 | /* fall through */ |
| 4361 | |
| 4362 | case R_PPC_ADDR32: |
| 4363 | case R_PPC_ADDR16: |
| 4364 | case R_PPC_ADDR16_LO: |
| 4365 | case R_PPC_ADDR16_HI: |
| 4366 | case R_PPC_ADDR16_HA: |
| 4367 | case R_PPC_UADDR32: |
| 4368 | case R_PPC_UADDR16: |
| 4369 | if (h != NULL && !info->shared) |
| 4370 | { |
| 4371 | /* We may need a plt entry if the symbol turns out to be |
| 4372 | a function defined in a dynamic object. */ |
| 4373 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4374 | return FALSE; |
| 4375 | |
| 4376 | /* We may need a copy reloc too. */ |
| 4377 | h->non_got_ref = 1; |
| 4378 | h->pointer_equality_needed = 1; |
| 4379 | } |
| 4380 | goto dodyn; |
| 4381 | |
| 4382 | case R_PPC_REL24: |
| 4383 | case R_PPC_REL14: |
| 4384 | case R_PPC_REL14_BRTAKEN: |
| 4385 | case R_PPC_REL14_BRNTAKEN: |
| 4386 | if (h == NULL) |
| 4387 | break; |
| 4388 | if (h == htab->elf.hgot) |
| 4389 | { |
| 4390 | if (htab->plt_type == PLT_UNSET) |
| 4391 | { |
| 4392 | htab->plt_type = PLT_OLD; |
| 4393 | htab->old_bfd = abfd; |
| 4394 | } |
| 4395 | break; |
| 4396 | } |
| 4397 | /* fall through */ |
| 4398 | |
| 4399 | case R_PPC_ADDR24: |
| 4400 | case R_PPC_ADDR14: |
| 4401 | case R_PPC_ADDR14_BRTAKEN: |
| 4402 | case R_PPC_ADDR14_BRNTAKEN: |
| 4403 | if (h != NULL && !info->shared) |
| 4404 | { |
| 4405 | /* We may need a plt entry if the symbol turns out to be |
| 4406 | a function defined in a dynamic object. */ |
| 4407 | h->needs_plt = 1; |
| 4408 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4409 | return FALSE; |
| 4410 | break; |
| 4411 | } |
| 4412 | |
| 4413 | dodyn: |
| 4414 | /* If we are creating a shared library, and this is a reloc |
| 4415 | against a global symbol, or a non PC relative reloc |
| 4416 | against a local symbol, then we need to copy the reloc |
| 4417 | into the shared library. However, if we are linking with |
| 4418 | -Bsymbolic, we do not need to copy a reloc against a |
| 4419 | global symbol which is defined in an object we are |
| 4420 | including in the link (i.e., DEF_REGULAR is set). At |
| 4421 | this point we have not seen all the input files, so it is |
| 4422 | possible that DEF_REGULAR is not set now but will be set |
| 4423 | later (it is never cleared). In case of a weak definition, |
| 4424 | DEF_REGULAR may be cleared later by a strong definition in |
| 4425 | a shared library. We account for that possibility below by |
| 4426 | storing information in the dyn_relocs field of the hash |
| 4427 | table entry. A similar situation occurs when creating |
| 4428 | shared libraries and symbol visibility changes render the |
| 4429 | symbol local. |
| 4430 | |
| 4431 | If on the other hand, we are creating an executable, we |
| 4432 | may need to keep relocations for symbols satisfied by a |
| 4433 | dynamic library if we manage to avoid copy relocs for the |
| 4434 | symbol. */ |
| 4435 | if ((info->shared |
| 4436 | && (must_be_dyn_reloc (info, r_type) |
| 4437 | || (h != NULL |
| 4438 | && (!SYMBOLIC_BIND (info, h) |
| 4439 | || h->root.type == bfd_link_hash_defweak |
| 4440 | || !h->def_regular)))) |
| 4441 | || (ELIMINATE_COPY_RELOCS |
| 4442 | && !info->shared |
| 4443 | && h != NULL |
| 4444 | && (h->root.type == bfd_link_hash_defweak |
| 4445 | || !h->def_regular))) |
| 4446 | { |
| 4447 | #ifdef DEBUG |
| 4448 | fprintf (stderr, |
| 4449 | "ppc_elf_check_relocs needs to " |
| 4450 | "create relocation for %s\n", |
| 4451 | (h && h->root.root.string |
| 4452 | ? h->root.root.string : "<unknown>")); |
| 4453 | #endif |
| 4454 | if (sreloc == NULL) |
| 4455 | { |
| 4456 | if (htab->elf.dynobj == NULL) |
| 4457 | htab->elf.dynobj = abfd; |
| 4458 | |
| 4459 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 4460 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); |
| 4461 | |
| 4462 | if (sreloc == NULL) |
| 4463 | return FALSE; |
| 4464 | } |
| 4465 | |
| 4466 | /* If this is a global symbol, we count the number of |
| 4467 | relocations we need for this symbol. */ |
| 4468 | if (h != NULL) |
| 4469 | { |
| 4470 | struct elf_dyn_relocs *p; |
| 4471 | struct elf_dyn_relocs **rel_head; |
| 4472 | |
| 4473 | rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; |
| 4474 | p = *rel_head; |
| 4475 | if (p == NULL || p->sec != sec) |
| 4476 | { |
| 4477 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 4478 | if (p == NULL) |
| 4479 | return FALSE; |
| 4480 | p->next = *rel_head; |
| 4481 | *rel_head = p; |
| 4482 | p->sec = sec; |
| 4483 | p->count = 0; |
| 4484 | p->pc_count = 0; |
| 4485 | } |
| 4486 | p->count += 1; |
| 4487 | if (!must_be_dyn_reloc (info, r_type)) |
| 4488 | p->pc_count += 1; |
| 4489 | } |
| 4490 | else |
| 4491 | { |
| 4492 | /* Track dynamic relocs needed for local syms too. |
| 4493 | We really need local syms available to do this |
| 4494 | easily. Oh well. */ |
| 4495 | struct ppc_dyn_relocs *p; |
| 4496 | struct ppc_dyn_relocs **rel_head; |
| 4497 | bfd_boolean is_ifunc; |
| 4498 | asection *s; |
| 4499 | void *vpp; |
| 4500 | Elf_Internal_Sym *isym; |
| 4501 | |
| 4502 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4503 | abfd, r_symndx); |
| 4504 | if (isym == NULL) |
| 4505 | return FALSE; |
| 4506 | |
| 4507 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4508 | if (s == NULL) |
| 4509 | s = sec; |
| 4510 | |
| 4511 | vpp = &elf_section_data (s)->local_dynrel; |
| 4512 | rel_head = (struct ppc_dyn_relocs **) vpp; |
| 4513 | is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; |
| 4514 | p = *rel_head; |
| 4515 | if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) |
| 4516 | p = p->next; |
| 4517 | if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) |
| 4518 | { |
| 4519 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 4520 | if (p == NULL) |
| 4521 | return FALSE; |
| 4522 | p->next = *rel_head; |
| 4523 | *rel_head = p; |
| 4524 | p->sec = sec; |
| 4525 | p->ifunc = is_ifunc; |
| 4526 | p->count = 0; |
| 4527 | } |
| 4528 | p->count += 1; |
| 4529 | } |
| 4530 | } |
| 4531 | |
| 4532 | break; |
| 4533 | } |
| 4534 | } |
| 4535 | |
| 4536 | return TRUE; |
| 4537 | } |
| 4538 | \f |
| 4539 | |
| 4540 | /* Merge object attributes from IBFD into OBFD. Raise an error if |
| 4541 | there are conflicting attributes. */ |
| 4542 | static bfd_boolean |
| 4543 | ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) |
| 4544 | { |
| 4545 | obj_attribute *in_attr, *in_attrs; |
| 4546 | obj_attribute *out_attr, *out_attrs; |
| 4547 | |
| 4548 | if (!elf_known_obj_attributes_proc (obfd)[0].i) |
| 4549 | { |
| 4550 | /* This is the first object. Copy the attributes. */ |
| 4551 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 4552 | |
| 4553 | /* Use the Tag_null value to indicate the attributes have been |
| 4554 | initialized. */ |
| 4555 | elf_known_obj_attributes_proc (obfd)[0].i = 1; |
| 4556 | |
| 4557 | return TRUE; |
| 4558 | } |
| 4559 | |
| 4560 | in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
| 4561 | out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; |
| 4562 | |
| 4563 | /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge |
| 4564 | non-conflicting ones. */ |
| 4565 | in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; |
| 4566 | out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; |
| 4567 | if (in_attr->i != out_attr->i) |
| 4568 | { |
| 4569 | out_attr->type = 1; |
| 4570 | if (out_attr->i == 0) |
| 4571 | out_attr->i = in_attr->i; |
| 4572 | else if (in_attr->i == 0) |
| 4573 | ; |
| 4574 | else if (out_attr->i == 1 && in_attr->i == 2) |
| 4575 | _bfd_error_handler |
| 4576 | (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); |
| 4577 | else if (out_attr->i == 1 && in_attr->i == 3) |
| 4578 | _bfd_error_handler |
| 4579 | (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), |
| 4580 | obfd, ibfd); |
| 4581 | else if (out_attr->i == 3 && in_attr->i == 1) |
| 4582 | _bfd_error_handler |
| 4583 | (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), |
| 4584 | ibfd, obfd); |
| 4585 | else if (out_attr->i == 3 && in_attr->i == 2) |
| 4586 | _bfd_error_handler |
| 4587 | (_("Warning: %B uses soft float, %B uses single-precision hard float"), |
| 4588 | ibfd, obfd); |
| 4589 | else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) |
| 4590 | _bfd_error_handler |
| 4591 | (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); |
| 4592 | else if (in_attr->i > 3) |
| 4593 | _bfd_error_handler |
| 4594 | (_("Warning: %B uses unknown floating point ABI %d"), ibfd, |
| 4595 | in_attr->i); |
| 4596 | else |
| 4597 | _bfd_error_handler |
| 4598 | (_("Warning: %B uses unknown floating point ABI %d"), obfd, |
| 4599 | out_attr->i); |
| 4600 | } |
| 4601 | |
| 4602 | /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and |
| 4603 | merge non-conflicting ones. */ |
| 4604 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; |
| 4605 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; |
| 4606 | if (in_attr->i != out_attr->i) |
| 4607 | { |
| 4608 | const char *in_abi = NULL, *out_abi = NULL; |
| 4609 | |
| 4610 | switch (in_attr->i) |
| 4611 | { |
| 4612 | case 1: in_abi = "generic"; break; |
| 4613 | case 2: in_abi = "AltiVec"; break; |
| 4614 | case 3: in_abi = "SPE"; break; |
| 4615 | } |
| 4616 | |
| 4617 | switch (out_attr->i) |
| 4618 | { |
| 4619 | case 1: out_abi = "generic"; break; |
| 4620 | case 2: out_abi = "AltiVec"; break; |
| 4621 | case 3: out_abi = "SPE"; break; |
| 4622 | } |
| 4623 | |
| 4624 | out_attr->type = 1; |
| 4625 | if (out_attr->i == 0) |
| 4626 | out_attr->i = in_attr->i; |
| 4627 | else if (in_attr->i == 0) |
| 4628 | ; |
| 4629 | /* For now, allow generic to transition to AltiVec or SPE |
| 4630 | without a warning. If GCC marked files with their stack |
| 4631 | alignment and used don't-care markings for files which are |
| 4632 | not affected by the vector ABI, we could warn about this |
| 4633 | case too. */ |
| 4634 | else if (out_attr->i == 1) |
| 4635 | out_attr->i = in_attr->i; |
| 4636 | else if (in_attr->i == 1) |
| 4637 | ; |
| 4638 | else if (in_abi == NULL) |
| 4639 | _bfd_error_handler |
| 4640 | (_("Warning: %B uses unknown vector ABI %d"), ibfd, |
| 4641 | in_attr->i); |
| 4642 | else if (out_abi == NULL) |
| 4643 | _bfd_error_handler |
| 4644 | (_("Warning: %B uses unknown vector ABI %d"), obfd, |
| 4645 | in_attr->i); |
| 4646 | else |
| 4647 | _bfd_error_handler |
| 4648 | (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), |
| 4649 | ibfd, obfd, in_abi, out_abi); |
| 4650 | } |
| 4651 | |
| 4652 | /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes |
| 4653 | and merge non-conflicting ones. */ |
| 4654 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; |
| 4655 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; |
| 4656 | if (in_attr->i != out_attr->i) |
| 4657 | { |
| 4658 | out_attr->type = 1; |
| 4659 | if (out_attr->i == 0) |
| 4660 | out_attr->i = in_attr->i; |
| 4661 | else if (in_attr->i == 0) |
| 4662 | ; |
| 4663 | else if (out_attr->i == 1 && in_attr->i == 2) |
| 4664 | _bfd_error_handler |
| 4665 | (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); |
| 4666 | else if (out_attr->i == 2 && in_attr->i == 1) |
| 4667 | _bfd_error_handler |
| 4668 | (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); |
| 4669 | else if (in_attr->i > 2) |
| 4670 | _bfd_error_handler |
| 4671 | (_("Warning: %B uses unknown small structure return convention %d"), ibfd, |
| 4672 | in_attr->i); |
| 4673 | else |
| 4674 | _bfd_error_handler |
| 4675 | (_("Warning: %B uses unknown small structure return convention %d"), obfd, |
| 4676 | out_attr->i); |
| 4677 | } |
| 4678 | |
| 4679 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| 4680 | _bfd_elf_merge_object_attributes (ibfd, obfd); |
| 4681 | |
| 4682 | return TRUE; |
| 4683 | } |
| 4684 | |
| 4685 | /* Merge backend specific data from an object file to the output |
| 4686 | object file when linking. */ |
| 4687 | |
| 4688 | static bfd_boolean |
| 4689 | ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4690 | { |
| 4691 | flagword old_flags; |
| 4692 | flagword new_flags; |
| 4693 | bfd_boolean error; |
| 4694 | |
| 4695 | if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) |
| 4696 | return TRUE; |
| 4697 | |
| 4698 | /* Check if we have the same endianness. */ |
| 4699 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 4700 | return FALSE; |
| 4701 | |
| 4702 | if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) |
| 4703 | return FALSE; |
| 4704 | |
| 4705 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 4706 | old_flags = elf_elfheader (obfd)->e_flags; |
| 4707 | if (!elf_flags_init (obfd)) |
| 4708 | { |
| 4709 | /* First call, no flags set. */ |
| 4710 | elf_flags_init (obfd) = TRUE; |
| 4711 | elf_elfheader (obfd)->e_flags = new_flags; |
| 4712 | } |
| 4713 | |
| 4714 | /* Compatible flags are ok. */ |
| 4715 | else if (new_flags == old_flags) |
| 4716 | ; |
| 4717 | |
| 4718 | /* Incompatible flags. */ |
| 4719 | else |
| 4720 | { |
| 4721 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib |
| 4722 | to be linked with either. */ |
| 4723 | error = FALSE; |
| 4724 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 4725 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 4726 | { |
| 4727 | error = TRUE; |
| 4728 | (*_bfd_error_handler) |
| 4729 | (_("%B: compiled with -mrelocatable and linked with " |
| 4730 | "modules compiled normally"), ibfd); |
| 4731 | } |
| 4732 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 4733 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 4734 | { |
| 4735 | error = TRUE; |
| 4736 | (*_bfd_error_handler) |
| 4737 | (_("%B: compiled normally and linked with " |
| 4738 | "modules compiled with -mrelocatable"), ibfd); |
| 4739 | } |
| 4740 | |
| 4741 | /* The output is -mrelocatable-lib iff both the input files are. */ |
| 4742 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) |
| 4743 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 4744 | |
| 4745 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, |
| 4746 | but each input file is either -mrelocatable or -mrelocatable-lib. */ |
| 4747 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) |
| 4748 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) |
| 4749 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) |
| 4750 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; |
| 4751 | |
| 4752 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if |
| 4753 | any module uses it. */ |
| 4754 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 4755 | |
| 4756 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 4757 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 4758 | |
| 4759 | /* Warn about any other mismatches. */ |
| 4760 | if (new_flags != old_flags) |
| 4761 | { |
| 4762 | error = TRUE; |
| 4763 | (*_bfd_error_handler) |
| 4764 | (_("%B: uses different e_flags (0x%lx) fields " |
| 4765 | "than previous modules (0x%lx)"), |
| 4766 | ibfd, (long) new_flags, (long) old_flags); |
| 4767 | } |
| 4768 | |
| 4769 | if (error) |
| 4770 | { |
| 4771 | bfd_set_error (bfd_error_bad_value); |
| 4772 | return FALSE; |
| 4773 | } |
| 4774 | } |
| 4775 | |
| 4776 | return TRUE; |
| 4777 | } |
| 4778 | |
| 4779 | static void |
| 4780 | ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc, |
| 4781 | bfd_vma value, |
| 4782 | split16_format_type split16_format) |
| 4783 | |
| 4784 | { |
| 4785 | unsigned int insn, top5; |
| 4786 | |
| 4787 | insn = bfd_get_32 (output_bfd, loc); |
| 4788 | top5 = value & 0xf800; |
| 4789 | top5 = top5 << (split16_format == split16a_type ? 9 : 5); |
| 4790 | insn |= top5; |
| 4791 | insn |= value & 0x7ff; |
| 4792 | bfd_put_32 (output_bfd, insn, loc); |
| 4793 | } |
| 4794 | |
| 4795 | \f |
| 4796 | /* Choose which PLT scheme to use, and set .plt flags appropriately. |
| 4797 | Returns -1 on error, 0 for old PLT, 1 for new PLT. */ |
| 4798 | int |
| 4799 | ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4800 | struct bfd_link_info *info) |
| 4801 | { |
| 4802 | struct ppc_elf_link_hash_table *htab; |
| 4803 | flagword flags; |
| 4804 | |
| 4805 | htab = ppc_elf_hash_table (info); |
| 4806 | |
| 4807 | if (htab->plt_type == PLT_UNSET) |
| 4808 | { |
| 4809 | struct elf_link_hash_entry *h; |
| 4810 | |
| 4811 | if (htab->params->plt_style == PLT_OLD) |
| 4812 | htab->plt_type = PLT_OLD; |
| 4813 | else if (info->shared |
| 4814 | && htab->elf.dynamic_sections_created |
| 4815 | && (h = elf_link_hash_lookup (&htab->elf, "_mcount", |
| 4816 | FALSE, FALSE, TRUE)) != NULL |
| 4817 | && (h->type == STT_FUNC |
| 4818 | || h->needs_plt) |
| 4819 | && h->ref_regular |
| 4820 | && !(SYMBOL_CALLS_LOCAL (info, h) |
| 4821 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 4822 | && h->root.type == bfd_link_hash_undefweak))) |
| 4823 | { |
| 4824 | /* Profiling of shared libs (and pies) is not supported with |
| 4825 | secure plt, because ppc32 does profiling before a |
| 4826 | function prologue and a secure plt pic call stubs needs |
| 4827 | r30 to be set up. */ |
| 4828 | htab->plt_type = PLT_OLD; |
| 4829 | } |
| 4830 | else |
| 4831 | { |
| 4832 | bfd *ibfd; |
| 4833 | enum ppc_elf_plt_type plt_type = htab->params->plt_style; |
| 4834 | |
| 4835 | /* Look through the reloc flags left by ppc_elf_check_relocs. |
| 4836 | Use the old style bss plt if a file makes plt calls |
| 4837 | without using the new relocs, and if ld isn't given |
| 4838 | --secure-plt and we never see REL16 relocs. */ |
| 4839 | if (plt_type == PLT_UNSET) |
| 4840 | plt_type = PLT_OLD; |
| 4841 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
| 4842 | if (is_ppc_elf (ibfd)) |
| 4843 | { |
| 4844 | if (ppc_elf_tdata (ibfd)->has_rel16) |
| 4845 | plt_type = PLT_NEW; |
| 4846 | else if (ppc_elf_tdata (ibfd)->makes_plt_call) |
| 4847 | { |
| 4848 | plt_type = PLT_OLD; |
| 4849 | htab->old_bfd = ibfd; |
| 4850 | break; |
| 4851 | } |
| 4852 | } |
| 4853 | htab->plt_type = plt_type; |
| 4854 | } |
| 4855 | } |
| 4856 | if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW) |
| 4857 | { |
| 4858 | if (htab->old_bfd != NULL) |
| 4859 | info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), |
| 4860 | htab->old_bfd); |
| 4861 | else |
| 4862 | info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); |
| 4863 | } |
| 4864 | |
| 4865 | BFD_ASSERT (htab->plt_type != PLT_VXWORKS); |
| 4866 | |
| 4867 | if (htab->plt_type == PLT_NEW) |
| 4868 | { |
| 4869 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 4870 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 4871 | |
| 4872 | /* The new PLT is a loaded section. */ |
| 4873 | if (htab->plt != NULL |
| 4874 | && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) |
| 4875 | return -1; |
| 4876 | |
| 4877 | /* The new GOT is not executable. */ |
| 4878 | if (htab->got != NULL |
| 4879 | && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) |
| 4880 | return -1; |
| 4881 | } |
| 4882 | else |
| 4883 | { |
| 4884 | /* Stop an unused .glink section from affecting .text alignment. */ |
| 4885 | if (htab->glink != NULL |
| 4886 | && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) |
| 4887 | return -1; |
| 4888 | } |
| 4889 | return htab->plt_type == PLT_NEW; |
| 4890 | } |
| 4891 | \f |
| 4892 | /* Return the section that should be marked against GC for a given |
| 4893 | relocation. */ |
| 4894 | |
| 4895 | static asection * |
| 4896 | ppc_elf_gc_mark_hook (asection *sec, |
| 4897 | struct bfd_link_info *info, |
| 4898 | Elf_Internal_Rela *rel, |
| 4899 | struct elf_link_hash_entry *h, |
| 4900 | Elf_Internal_Sym *sym) |
| 4901 | { |
| 4902 | if (h != NULL) |
| 4903 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4904 | { |
| 4905 | case R_PPC_GNU_VTINHERIT: |
| 4906 | case R_PPC_GNU_VTENTRY: |
| 4907 | return NULL; |
| 4908 | } |
| 4909 | |
| 4910 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 4911 | } |
| 4912 | |
| 4913 | /* Update the got, plt and dynamic reloc reference counts for the |
| 4914 | section being removed. */ |
| 4915 | |
| 4916 | static bfd_boolean |
| 4917 | ppc_elf_gc_sweep_hook (bfd *abfd, |
| 4918 | struct bfd_link_info *info, |
| 4919 | asection *sec, |
| 4920 | const Elf_Internal_Rela *relocs) |
| 4921 | { |
| 4922 | struct ppc_elf_link_hash_table *htab; |
| 4923 | Elf_Internal_Shdr *symtab_hdr; |
| 4924 | struct elf_link_hash_entry **sym_hashes; |
| 4925 | bfd_signed_vma *local_got_refcounts; |
| 4926 | const Elf_Internal_Rela *rel, *relend; |
| 4927 | asection *got2; |
| 4928 | |
| 4929 | if (info->relocatable) |
| 4930 | return TRUE; |
| 4931 | |
| 4932 | if ((sec->flags & SEC_ALLOC) == 0) |
| 4933 | return TRUE; |
| 4934 | |
| 4935 | elf_section_data (sec)->local_dynrel = NULL; |
| 4936 | |
| 4937 | htab = ppc_elf_hash_table (info); |
| 4938 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 4939 | sym_hashes = elf_sym_hashes (abfd); |
| 4940 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 4941 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 4942 | |
| 4943 | relend = relocs + sec->reloc_count; |
| 4944 | for (rel = relocs; rel < relend; rel++) |
| 4945 | { |
| 4946 | unsigned long r_symndx; |
| 4947 | enum elf_ppc_reloc_type r_type; |
| 4948 | struct elf_link_hash_entry *h = NULL; |
| 4949 | |
| 4950 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4951 | if (r_symndx >= symtab_hdr->sh_info) |
| 4952 | { |
| 4953 | struct elf_dyn_relocs **pp, *p; |
| 4954 | struct ppc_elf_link_hash_entry *eh; |
| 4955 | |
| 4956 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4957 | while (h->root.type == bfd_link_hash_indirect |
| 4958 | || h->root.type == bfd_link_hash_warning) |
| 4959 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4960 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 4961 | |
| 4962 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 4963 | if (p->sec == sec) |
| 4964 | { |
| 4965 | /* Everything must go for SEC. */ |
| 4966 | *pp = p->next; |
| 4967 | break; |
| 4968 | } |
| 4969 | } |
| 4970 | |
| 4971 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4972 | if (!htab->is_vxworks |
| 4973 | && h == NULL |
| 4974 | && local_got_refcounts != NULL |
| 4975 | && (!info->shared |
| 4976 | || is_branch_reloc (r_type))) |
| 4977 | { |
| 4978 | struct plt_entry **local_plt = (struct plt_entry **) |
| 4979 | (local_got_refcounts + symtab_hdr->sh_info); |
| 4980 | char *local_got_tls_masks = (char *) |
| 4981 | (local_plt + symtab_hdr->sh_info); |
| 4982 | if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) |
| 4983 | { |
| 4984 | struct plt_entry **ifunc = local_plt + r_symndx; |
| 4985 | bfd_vma addend = 0; |
| 4986 | struct plt_entry *ent; |
| 4987 | |
| 4988 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 4989 | addend = rel->r_addend; |
| 4990 | ent = find_plt_ent (ifunc, got2, addend); |
| 4991 | if (ent->plt.refcount > 0) |
| 4992 | ent->plt.refcount -= 1; |
| 4993 | continue; |
| 4994 | } |
| 4995 | } |
| 4996 | |
| 4997 | switch (r_type) |
| 4998 | { |
| 4999 | case R_PPC_GOT_TLSLD16: |
| 5000 | case R_PPC_GOT_TLSLD16_LO: |
| 5001 | case R_PPC_GOT_TLSLD16_HI: |
| 5002 | case R_PPC_GOT_TLSLD16_HA: |
| 5003 | case R_PPC_GOT_TLSGD16: |
| 5004 | case R_PPC_GOT_TLSGD16_LO: |
| 5005 | case R_PPC_GOT_TLSGD16_HI: |
| 5006 | case R_PPC_GOT_TLSGD16_HA: |
| 5007 | case R_PPC_GOT_TPREL16: |
| 5008 | case R_PPC_GOT_TPREL16_LO: |
| 5009 | case R_PPC_GOT_TPREL16_HI: |
| 5010 | case R_PPC_GOT_TPREL16_HA: |
| 5011 | case R_PPC_GOT_DTPREL16: |
| 5012 | case R_PPC_GOT_DTPREL16_LO: |
| 5013 | case R_PPC_GOT_DTPREL16_HI: |
| 5014 | case R_PPC_GOT_DTPREL16_HA: |
| 5015 | case R_PPC_GOT16: |
| 5016 | case R_PPC_GOT16_LO: |
| 5017 | case R_PPC_GOT16_HI: |
| 5018 | case R_PPC_GOT16_HA: |
| 5019 | if (h != NULL) |
| 5020 | { |
| 5021 | if (h->got.refcount > 0) |
| 5022 | h->got.refcount--; |
| 5023 | if (!info->shared) |
| 5024 | { |
| 5025 | struct plt_entry *ent; |
| 5026 | |
| 5027 | ent = find_plt_ent (&h->plt.plist, NULL, 0); |
| 5028 | if (ent != NULL && ent->plt.refcount > 0) |
| 5029 | ent->plt.refcount -= 1; |
| 5030 | } |
| 5031 | } |
| 5032 | else if (local_got_refcounts != NULL) |
| 5033 | { |
| 5034 | if (local_got_refcounts[r_symndx] > 0) |
| 5035 | local_got_refcounts[r_symndx]--; |
| 5036 | } |
| 5037 | break; |
| 5038 | |
| 5039 | case R_PPC_REL24: |
| 5040 | case R_PPC_REL14: |
| 5041 | case R_PPC_REL14_BRTAKEN: |
| 5042 | case R_PPC_REL14_BRNTAKEN: |
| 5043 | case R_PPC_REL32: |
| 5044 | if (h == NULL || h == htab->elf.hgot) |
| 5045 | break; |
| 5046 | /* Fall thru */ |
| 5047 | |
| 5048 | case R_PPC_ADDR32: |
| 5049 | case R_PPC_ADDR24: |
| 5050 | case R_PPC_ADDR16: |
| 5051 | case R_PPC_ADDR16_LO: |
| 5052 | case R_PPC_ADDR16_HI: |
| 5053 | case R_PPC_ADDR16_HA: |
| 5054 | case R_PPC_ADDR14: |
| 5055 | case R_PPC_ADDR14_BRTAKEN: |
| 5056 | case R_PPC_ADDR14_BRNTAKEN: |
| 5057 | case R_PPC_UADDR32: |
| 5058 | case R_PPC_UADDR16: |
| 5059 | if (info->shared) |
| 5060 | break; |
| 5061 | |
| 5062 | case R_PPC_PLT32: |
| 5063 | case R_PPC_PLTREL24: |
| 5064 | case R_PPC_PLTREL32: |
| 5065 | case R_PPC_PLT16_LO: |
| 5066 | case R_PPC_PLT16_HI: |
| 5067 | case R_PPC_PLT16_HA: |
| 5068 | if (h != NULL) |
| 5069 | { |
| 5070 | bfd_vma addend = 0; |
| 5071 | struct plt_entry *ent; |
| 5072 | |
| 5073 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 5074 | addend = rel->r_addend; |
| 5075 | ent = find_plt_ent (&h->plt.plist, got2, addend); |
| 5076 | if (ent != NULL && ent->plt.refcount > 0) |
| 5077 | ent->plt.refcount -= 1; |
| 5078 | } |
| 5079 | break; |
| 5080 | |
| 5081 | default: |
| 5082 | break; |
| 5083 | } |
| 5084 | } |
| 5085 | return TRUE; |
| 5086 | } |
| 5087 | \f |
| 5088 | /* Set plt output section type, htab->tls_get_addr, and call the |
| 5089 | generic ELF tls_setup function. */ |
| 5090 | |
| 5091 | asection * |
| 5092 | ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) |
| 5093 | { |
| 5094 | struct ppc_elf_link_hash_table *htab; |
| 5095 | |
| 5096 | htab = ppc_elf_hash_table (info); |
| 5097 | htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 5098 | FALSE, FALSE, TRUE); |
| 5099 | if (htab->plt_type != PLT_NEW) |
| 5100 | htab->params->no_tls_get_addr_opt = TRUE; |
| 5101 | |
| 5102 | if (!htab->params->no_tls_get_addr_opt) |
| 5103 | { |
| 5104 | struct elf_link_hash_entry *opt, *tga; |
| 5105 | opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", |
| 5106 | FALSE, FALSE, TRUE); |
| 5107 | if (opt != NULL |
| 5108 | && (opt->root.type == bfd_link_hash_defined |
| 5109 | || opt->root.type == bfd_link_hash_defweak)) |
| 5110 | { |
| 5111 | /* If glibc supports an optimized __tls_get_addr call stub, |
| 5112 | signalled by the presence of __tls_get_addr_opt, and we'll |
| 5113 | be calling __tls_get_addr via a plt call stub, then |
| 5114 | make __tls_get_addr point to __tls_get_addr_opt. */ |
| 5115 | tga = htab->tls_get_addr; |
| 5116 | if (htab->elf.dynamic_sections_created |
| 5117 | && tga != NULL |
| 5118 | && (tga->type == STT_FUNC |
| 5119 | || tga->needs_plt) |
| 5120 | && !(SYMBOL_CALLS_LOCAL (info, tga) |
| 5121 | || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT |
| 5122 | && tga->root.type == bfd_link_hash_undefweak))) |
| 5123 | { |
| 5124 | struct plt_entry *ent; |
| 5125 | for (ent = tga->plt.plist; ent != NULL; ent = ent->next) |
| 5126 | if (ent->plt.refcount > 0) |
| 5127 | break; |
| 5128 | if (ent != NULL) |
| 5129 | { |
| 5130 | tga->root.type = bfd_link_hash_indirect; |
| 5131 | tga->root.u.i.link = &opt->root; |
| 5132 | ppc_elf_copy_indirect_symbol (info, opt, tga); |
| 5133 | if (opt->dynindx != -1) |
| 5134 | { |
| 5135 | /* Use __tls_get_addr_opt in dynamic relocations. */ |
| 5136 | opt->dynindx = -1; |
| 5137 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 5138 | opt->dynstr_index); |
| 5139 | if (!bfd_elf_link_record_dynamic_symbol (info, opt)) |
| 5140 | return FALSE; |
| 5141 | } |
| 5142 | htab->tls_get_addr = opt; |
| 5143 | } |
| 5144 | } |
| 5145 | } |
| 5146 | else |
| 5147 | htab->params->no_tls_get_addr_opt = TRUE; |
| 5148 | } |
| 5149 | if (htab->plt_type == PLT_NEW |
| 5150 | && htab->plt != NULL |
| 5151 | && htab->plt->output_section != NULL) |
| 5152 | { |
| 5153 | elf_section_type (htab->plt->output_section) = SHT_PROGBITS; |
| 5154 | elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; |
| 5155 | } |
| 5156 | |
| 5157 | return _bfd_elf_tls_setup (obfd, info); |
| 5158 | } |
| 5159 | |
| 5160 | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
| 5161 | HASH. */ |
| 5162 | |
| 5163 | static bfd_boolean |
| 5164 | branch_reloc_hash_match (const bfd *ibfd, |
| 5165 | const Elf_Internal_Rela *rel, |
| 5166 | const struct elf_link_hash_entry *hash) |
| 5167 | { |
| 5168 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 5169 | enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); |
| 5170 | unsigned int r_symndx = ELF32_R_SYM (rel->r_info); |
| 5171 | |
| 5172 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
| 5173 | { |
| 5174 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 5175 | struct elf_link_hash_entry *h; |
| 5176 | |
| 5177 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5178 | while (h->root.type == bfd_link_hash_indirect |
| 5179 | || h->root.type == bfd_link_hash_warning) |
| 5180 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5181 | if (h == hash) |
| 5182 | return TRUE; |
| 5183 | } |
| 5184 | return FALSE; |
| 5185 | } |
| 5186 | |
| 5187 | /* Run through all the TLS relocs looking for optimization |
| 5188 | opportunities. */ |
| 5189 | |
| 5190 | bfd_boolean |
| 5191 | ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, |
| 5192 | struct bfd_link_info *info) |
| 5193 | { |
| 5194 | bfd *ibfd; |
| 5195 | asection *sec; |
| 5196 | struct ppc_elf_link_hash_table *htab; |
| 5197 | int pass; |
| 5198 | |
| 5199 | if (info->relocatable || !info->executable) |
| 5200 | return TRUE; |
| 5201 | |
| 5202 | htab = ppc_elf_hash_table (info); |
| 5203 | if (htab == NULL) |
| 5204 | return FALSE; |
| 5205 | |
| 5206 | /* Make two passes through the relocs. First time check that tls |
| 5207 | relocs involved in setting up a tls_get_addr call are indeed |
| 5208 | followed by such a call. If they are not, don't do any tls |
| 5209 | optimization. On the second pass twiddle tls_mask flags to |
| 5210 | notify relocate_section that optimization can be done, and |
| 5211 | adjust got and plt refcounts. */ |
| 5212 | for (pass = 0; pass < 2; ++pass) |
| 5213 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 5214 | { |
| 5215 | Elf_Internal_Sym *locsyms = NULL; |
| 5216 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 5217 | asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); |
| 5218 | |
| 5219 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 5220 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| 5221 | { |
| 5222 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 5223 | int expecting_tls_get_addr = 0; |
| 5224 | |
| 5225 | /* Read the relocations. */ |
| 5226 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 5227 | info->keep_memory); |
| 5228 | if (relstart == NULL) |
| 5229 | return FALSE; |
| 5230 | |
| 5231 | relend = relstart + sec->reloc_count; |
| 5232 | for (rel = relstart; rel < relend; rel++) |
| 5233 | { |
| 5234 | enum elf_ppc_reloc_type r_type; |
| 5235 | unsigned long r_symndx; |
| 5236 | struct elf_link_hash_entry *h = NULL; |
| 5237 | char *tls_mask; |
| 5238 | char tls_set, tls_clear; |
| 5239 | bfd_boolean is_local; |
| 5240 | bfd_signed_vma *got_count; |
| 5241 | |
| 5242 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 5243 | if (r_symndx >= symtab_hdr->sh_info) |
| 5244 | { |
| 5245 | struct elf_link_hash_entry **sym_hashes; |
| 5246 | |
| 5247 | sym_hashes = elf_sym_hashes (ibfd); |
| 5248 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5249 | while (h->root.type == bfd_link_hash_indirect |
| 5250 | || h->root.type == bfd_link_hash_warning) |
| 5251 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5252 | } |
| 5253 | |
| 5254 | is_local = FALSE; |
| 5255 | if (h == NULL |
| 5256 | || !h->def_dynamic) |
| 5257 | is_local = TRUE; |
| 5258 | |
| 5259 | r_type = ELF32_R_TYPE (rel->r_info); |
| 5260 | /* If this section has old-style __tls_get_addr calls |
| 5261 | without marker relocs, then check that each |
| 5262 | __tls_get_addr call reloc is preceded by a reloc |
| 5263 | that conceivably belongs to the __tls_get_addr arg |
| 5264 | setup insn. If we don't find matching arg setup |
| 5265 | relocs, don't do any tls optimization. */ |
| 5266 | if (pass == 0 |
| 5267 | && sec->has_tls_get_addr_call |
| 5268 | && h != NULL |
| 5269 | && h == htab->tls_get_addr |
| 5270 | && !expecting_tls_get_addr |
| 5271 | && is_branch_reloc (r_type)) |
| 5272 | { |
| 5273 | info->callbacks->minfo ("%H __tls_get_addr lost arg, " |
| 5274 | "TLS optimization disabled\n", |
| 5275 | ibfd, sec, rel->r_offset); |
| 5276 | if (elf_section_data (sec)->relocs != relstart) |
| 5277 | free (relstart); |
| 5278 | return TRUE; |
| 5279 | } |
| 5280 | |
| 5281 | expecting_tls_get_addr = 0; |
| 5282 | switch (r_type) |
| 5283 | { |
| 5284 | case R_PPC_GOT_TLSLD16: |
| 5285 | case R_PPC_GOT_TLSLD16_LO: |
| 5286 | expecting_tls_get_addr = 1; |
| 5287 | /* Fall thru */ |
| 5288 | |
| 5289 | case R_PPC_GOT_TLSLD16_HI: |
| 5290 | case R_PPC_GOT_TLSLD16_HA: |
| 5291 | /* These relocs should never be against a symbol |
| 5292 | defined in a shared lib. Leave them alone if |
| 5293 | that turns out to be the case. */ |
| 5294 | if (!is_local) |
| 5295 | continue; |
| 5296 | |
| 5297 | /* LD -> LE */ |
| 5298 | tls_set = 0; |
| 5299 | tls_clear = TLS_LD; |
| 5300 | break; |
| 5301 | |
| 5302 | case R_PPC_GOT_TLSGD16: |
| 5303 | case R_PPC_GOT_TLSGD16_LO: |
| 5304 | expecting_tls_get_addr = 1; |
| 5305 | /* Fall thru */ |
| 5306 | |
| 5307 | case R_PPC_GOT_TLSGD16_HI: |
| 5308 | case R_PPC_GOT_TLSGD16_HA: |
| 5309 | if (is_local) |
| 5310 | /* GD -> LE */ |
| 5311 | tls_set = 0; |
| 5312 | else |
| 5313 | /* GD -> IE */ |
| 5314 | tls_set = TLS_TLS | TLS_TPRELGD; |
| 5315 | tls_clear = TLS_GD; |
| 5316 | break; |
| 5317 | |
| 5318 | case R_PPC_GOT_TPREL16: |
| 5319 | case R_PPC_GOT_TPREL16_LO: |
| 5320 | case R_PPC_GOT_TPREL16_HI: |
| 5321 | case R_PPC_GOT_TPREL16_HA: |
| 5322 | if (is_local) |
| 5323 | { |
| 5324 | /* IE -> LE */ |
| 5325 | tls_set = 0; |
| 5326 | tls_clear = TLS_TPREL; |
| 5327 | break; |
| 5328 | } |
| 5329 | else |
| 5330 | continue; |
| 5331 | |
| 5332 | case R_PPC_TLSGD: |
| 5333 | case R_PPC_TLSLD: |
| 5334 | expecting_tls_get_addr = 2; |
| 5335 | tls_set = 0; |
| 5336 | tls_clear = 0; |
| 5337 | break; |
| 5338 | |
| 5339 | default: |
| 5340 | continue; |
| 5341 | } |
| 5342 | |
| 5343 | if (pass == 0) |
| 5344 | { |
| 5345 | if (!expecting_tls_get_addr |
| 5346 | || (expecting_tls_get_addr == 1 |
| 5347 | && !sec->has_tls_get_addr_call)) |
| 5348 | continue; |
| 5349 | |
| 5350 | if (rel + 1 < relend |
| 5351 | && branch_reloc_hash_match (ibfd, rel + 1, |
| 5352 | htab->tls_get_addr)) |
| 5353 | continue; |
| 5354 | |
| 5355 | /* Uh oh, we didn't find the expected call. We |
| 5356 | could just mark this symbol to exclude it |
| 5357 | from tls optimization but it's safer to skip |
| 5358 | the entire optimization. */ |
| 5359 | info->callbacks->minfo (_("%H arg lost __tls_get_addr, " |
| 5360 | "TLS optimization disabled\n"), |
| 5361 | ibfd, sec, rel->r_offset); |
| 5362 | if (elf_section_data (sec)->relocs != relstart) |
| 5363 | free (relstart); |
| 5364 | return TRUE; |
| 5365 | } |
| 5366 | |
| 5367 | if (expecting_tls_get_addr) |
| 5368 | { |
| 5369 | struct plt_entry *ent; |
| 5370 | bfd_vma addend = 0; |
| 5371 | |
| 5372 | if (info->shared |
| 5373 | && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) |
| 5374 | addend = rel[1].r_addend; |
| 5375 | ent = find_plt_ent (&htab->tls_get_addr->plt.plist, |
| 5376 | got2, addend); |
| 5377 | if (ent != NULL && ent->plt.refcount > 0) |
| 5378 | ent->plt.refcount -= 1; |
| 5379 | |
| 5380 | if (expecting_tls_get_addr == 2) |
| 5381 | continue; |
| 5382 | } |
| 5383 | |
| 5384 | if (h != NULL) |
| 5385 | { |
| 5386 | tls_mask = &ppc_elf_hash_entry (h)->tls_mask; |
| 5387 | got_count = &h->got.refcount; |
| 5388 | } |
| 5389 | else |
| 5390 | { |
| 5391 | bfd_signed_vma *lgot_refs; |
| 5392 | struct plt_entry **local_plt; |
| 5393 | char *lgot_masks; |
| 5394 | |
| 5395 | if (locsyms == NULL) |
| 5396 | { |
| 5397 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 5398 | if (locsyms == NULL) |
| 5399 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 5400 | symtab_hdr->sh_info, |
| 5401 | 0, NULL, NULL, NULL); |
| 5402 | if (locsyms == NULL) |
| 5403 | { |
| 5404 | if (elf_section_data (sec)->relocs != relstart) |
| 5405 | free (relstart); |
| 5406 | return FALSE; |
| 5407 | } |
| 5408 | } |
| 5409 | lgot_refs = elf_local_got_refcounts (ibfd); |
| 5410 | if (lgot_refs == NULL) |
| 5411 | abort (); |
| 5412 | local_plt = (struct plt_entry **) |
| 5413 | (lgot_refs + symtab_hdr->sh_info); |
| 5414 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 5415 | tls_mask = &lgot_masks[r_symndx]; |
| 5416 | got_count = &lgot_refs[r_symndx]; |
| 5417 | } |
| 5418 | |
| 5419 | if (tls_set == 0) |
| 5420 | { |
| 5421 | /* We managed to get rid of a got entry. */ |
| 5422 | if (*got_count > 0) |
| 5423 | *got_count -= 1; |
| 5424 | } |
| 5425 | |
| 5426 | *tls_mask |= tls_set; |
| 5427 | *tls_mask &= ~tls_clear; |
| 5428 | } |
| 5429 | |
| 5430 | if (elf_section_data (sec)->relocs != relstart) |
| 5431 | free (relstart); |
| 5432 | } |
| 5433 | |
| 5434 | if (locsyms != NULL |
| 5435 | && (symtab_hdr->contents != (unsigned char *) locsyms)) |
| 5436 | { |
| 5437 | if (!info->keep_memory) |
| 5438 | free (locsyms); |
| 5439 | else |
| 5440 | symtab_hdr->contents = (unsigned char *) locsyms; |
| 5441 | } |
| 5442 | } |
| 5443 | return TRUE; |
| 5444 | } |
| 5445 | \f |
| 5446 | /* Return true if we have dynamic relocs that apply to read-only sections. */ |
| 5447 | |
| 5448 | static bfd_boolean |
| 5449 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 5450 | { |
| 5451 | struct elf_dyn_relocs *p; |
| 5452 | |
| 5453 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 5454 | { |
| 5455 | asection *s = p->sec->output_section; |
| 5456 | |
| 5457 | if (s != NULL |
| 5458 | && ((s->flags & (SEC_READONLY | SEC_ALLOC)) |
| 5459 | == (SEC_READONLY | SEC_ALLOC))) |
| 5460 | return TRUE; |
| 5461 | } |
| 5462 | return FALSE; |
| 5463 | } |
| 5464 | |
| 5465 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 5466 | regular object. The current definition is in some section of the |
| 5467 | dynamic object, but we're not including those sections. We have to |
| 5468 | change the definition to something the rest of the link can |
| 5469 | understand. */ |
| 5470 | |
| 5471 | static bfd_boolean |
| 5472 | ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 5473 | struct elf_link_hash_entry *h) |
| 5474 | { |
| 5475 | struct ppc_elf_link_hash_table *htab; |
| 5476 | asection *s; |
| 5477 | |
| 5478 | #ifdef DEBUG |
| 5479 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", |
| 5480 | h->root.root.string); |
| 5481 | #endif |
| 5482 | |
| 5483 | /* Make sure we know what is going on here. */ |
| 5484 | htab = ppc_elf_hash_table (info); |
| 5485 | BFD_ASSERT (htab->elf.dynobj != NULL |
| 5486 | && (h->needs_plt |
| 5487 | || h->type == STT_GNU_IFUNC |
| 5488 | || h->u.weakdef != NULL |
| 5489 | || (h->def_dynamic |
| 5490 | && h->ref_regular |
| 5491 | && !h->def_regular))); |
| 5492 | |
| 5493 | /* Deal with function syms. */ |
| 5494 | if (h->type == STT_FUNC |
| 5495 | || h->type == STT_GNU_IFUNC |
| 5496 | || h->needs_plt) |
| 5497 | { |
| 5498 | /* Clear procedure linkage table information for any symbol that |
| 5499 | won't need a .plt entry. */ |
| 5500 | struct plt_entry *ent; |
| 5501 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 5502 | if (ent->plt.refcount > 0) |
| 5503 | break; |
| 5504 | if (ent == NULL |
| 5505 | || (h->type != STT_GNU_IFUNC |
| 5506 | && (SYMBOL_CALLS_LOCAL (info, h) |
| 5507 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 5508 | && h->root.type == bfd_link_hash_undefweak)))) |
| 5509 | { |
| 5510 | /* A PLT entry is not required/allowed when: |
| 5511 | |
| 5512 | 1. We are not using ld.so; because then the PLT entry |
| 5513 | can't be set up, so we can't use one. In this case, |
| 5514 | ppc_elf_adjust_dynamic_symbol won't even be called. |
| 5515 | |
| 5516 | 2. GC has rendered the entry unused. |
| 5517 | |
| 5518 | 3. We know for certain that a call to this symbol |
| 5519 | will go to this object, or will remain undefined. */ |
| 5520 | h->plt.plist = NULL; |
| 5521 | h->needs_plt = 0; |
| 5522 | h->pointer_equality_needed = 0; |
| 5523 | } |
| 5524 | else |
| 5525 | { |
| 5526 | /* Taking a function's address in a read/write section |
| 5527 | doesn't require us to define the function symbol in the |
| 5528 | executable on a plt call stub. A dynamic reloc can |
| 5529 | be used instead. */ |
| 5530 | if (h->pointer_equality_needed |
| 5531 | && h->type != STT_GNU_IFUNC |
| 5532 | && !htab->is_vxworks |
| 5533 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 5534 | && !readonly_dynrelocs (h)) |
| 5535 | { |
| 5536 | h->pointer_equality_needed = 0; |
| 5537 | h->non_got_ref = 0; |
| 5538 | } |
| 5539 | |
| 5540 | /* After adjust_dynamic_symbol, non_got_ref set in the |
| 5541 | non-shared case means that we have allocated space in |
| 5542 | .dynbss for the symbol and thus dyn_relocs for this |
| 5543 | symbol should be discarded. |
| 5544 | If we get here we know we are making a PLT entry for this |
| 5545 | symbol, and in an executable we'd normally resolve |
| 5546 | relocations against this symbol to the PLT entry. Allow |
| 5547 | dynamic relocs if the reference is weak, and the dynamic |
| 5548 | relocs will not cause text relocation. */ |
| 5549 | else if (!h->ref_regular_nonweak |
| 5550 | && h->non_got_ref |
| 5551 | && h->type != STT_GNU_IFUNC |
| 5552 | && !htab->is_vxworks |
| 5553 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 5554 | && !readonly_dynrelocs (h)) |
| 5555 | h->non_got_ref = 0; |
| 5556 | } |
| 5557 | return TRUE; |
| 5558 | } |
| 5559 | else |
| 5560 | h->plt.plist = NULL; |
| 5561 | |
| 5562 | /* If this is a weak symbol, and there is a real definition, the |
| 5563 | processor independent code will have arranged for us to see the |
| 5564 | real definition first, and we can just use the same value. */ |
| 5565 | if (h->u.weakdef != NULL) |
| 5566 | { |
| 5567 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 5568 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 5569 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 5570 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 5571 | if (ELIMINATE_COPY_RELOCS) |
| 5572 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 5573 | return TRUE; |
| 5574 | } |
| 5575 | |
| 5576 | /* This is a reference to a symbol defined by a dynamic object which |
| 5577 | is not a function. */ |
| 5578 | |
| 5579 | /* If we are creating a shared library, we must presume that the |
| 5580 | only references to the symbol are via the global offset table. |
| 5581 | For such cases we need not do anything here; the relocations will |
| 5582 | be handled correctly by relocate_section. */ |
| 5583 | if (info->shared) |
| 5584 | return TRUE; |
| 5585 | |
| 5586 | /* If there are no references to this symbol that do not use the |
| 5587 | GOT, we don't need to generate a copy reloc. */ |
| 5588 | if (!h->non_got_ref) |
| 5589 | return TRUE; |
| 5590 | |
| 5591 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 5592 | if (info->nocopyreloc) |
| 5593 | { |
| 5594 | h->non_got_ref = 0; |
| 5595 | return TRUE; |
| 5596 | } |
| 5597 | |
| 5598 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 5599 | we'll be keeping the dynamic relocs and avoiding the copy reloc. |
| 5600 | We can't do this if there are any small data relocations. This |
| 5601 | doesn't work on VxWorks, where we can not have dynamic |
| 5602 | relocations (other than copy and jump slot relocations) in an |
| 5603 | executable. */ |
| 5604 | if (ELIMINATE_COPY_RELOCS |
| 5605 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 5606 | && !htab->is_vxworks |
| 5607 | && !h->def_regular |
| 5608 | && !readonly_dynrelocs (h)) |
| 5609 | { |
| 5610 | h->non_got_ref = 0; |
| 5611 | return TRUE; |
| 5612 | } |
| 5613 | |
| 5614 | /* Protected variables do not work with .dynbss. The copy in |
| 5615 | .dynbss won't be used by the shared library with the protected |
| 5616 | definition for the variable. Text relocations are preferable |
| 5617 | to an incorrect program. */ |
| 5618 | if (h->protected_def) |
| 5619 | { |
| 5620 | h->non_got_ref = 0; |
| 5621 | return TRUE; |
| 5622 | } |
| 5623 | |
| 5624 | /* We must allocate the symbol in our .dynbss section, which will |
| 5625 | become part of the .bss section of the executable. There will be |
| 5626 | an entry for this symbol in the .dynsym section. The dynamic |
| 5627 | object will contain position independent code, so all references |
| 5628 | from the dynamic object to this symbol will go through the global |
| 5629 | offset table. The dynamic linker will use the .dynsym entry to |
| 5630 | determine the address it must put in the global offset table, so |
| 5631 | both the dynamic object and the regular object will refer to the |
| 5632 | same memory location for the variable. |
| 5633 | |
| 5634 | Of course, if the symbol is referenced using SDAREL relocs, we |
| 5635 | must instead allocate it in .sbss. */ |
| 5636 | |
| 5637 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 5638 | s = htab->dynsbss; |
| 5639 | else |
| 5640 | s = htab->dynbss; |
| 5641 | BFD_ASSERT (s != NULL); |
| 5642 | |
| 5643 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 5644 | copy the initial value out of the dynamic object and into the |
| 5645 | runtime process image. We need to remember the offset into the |
| 5646 | .rela.bss section we are going to use. */ |
| 5647 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 5648 | { |
| 5649 | asection *srel; |
| 5650 | |
| 5651 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 5652 | srel = htab->relsbss; |
| 5653 | else |
| 5654 | srel = htab->relbss; |
| 5655 | BFD_ASSERT (srel != NULL); |
| 5656 | srel->size += sizeof (Elf32_External_Rela); |
| 5657 | h->needs_copy = 1; |
| 5658 | } |
| 5659 | |
| 5660 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 5661 | } |
| 5662 | \f |
| 5663 | /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is |
| 5664 | xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, |
| 5665 | specifying the addend on the plt relocation. For -fpic code, the sym |
| 5666 | is xxxxxxxx.plt_pic32.<callee>, and for -fPIC |
| 5667 | xxxxxxxx.got2.plt_pic32.<callee>. */ |
| 5668 | |
| 5669 | static bfd_boolean |
| 5670 | add_stub_sym (struct plt_entry *ent, |
| 5671 | struct elf_link_hash_entry *h, |
| 5672 | struct bfd_link_info *info) |
| 5673 | { |
| 5674 | struct elf_link_hash_entry *sh; |
| 5675 | size_t len1, len2, len3; |
| 5676 | char *name; |
| 5677 | const char *stub; |
| 5678 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 5679 | |
| 5680 | if (info->shared) |
| 5681 | stub = ".plt_pic32."; |
| 5682 | else |
| 5683 | stub = ".plt_call32."; |
| 5684 | |
| 5685 | len1 = strlen (h->root.root.string); |
| 5686 | len2 = strlen (stub); |
| 5687 | len3 = 0; |
| 5688 | if (ent->sec) |
| 5689 | len3 = strlen (ent->sec->name); |
| 5690 | name = bfd_malloc (len1 + len2 + len3 + 9); |
| 5691 | if (name == NULL) |
| 5692 | return FALSE; |
| 5693 | sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); |
| 5694 | if (ent->sec) |
| 5695 | memcpy (name + 8, ent->sec->name, len3); |
| 5696 | memcpy (name + 8 + len3, stub, len2); |
| 5697 | memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); |
| 5698 | sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 5699 | if (sh == NULL) |
| 5700 | return FALSE; |
| 5701 | if (sh->root.type == bfd_link_hash_new) |
| 5702 | { |
| 5703 | sh->root.type = bfd_link_hash_defined; |
| 5704 | sh->root.u.def.section = htab->glink; |
| 5705 | sh->root.u.def.value = ent->glink_offset; |
| 5706 | sh->ref_regular = 1; |
| 5707 | sh->def_regular = 1; |
| 5708 | sh->ref_regular_nonweak = 1; |
| 5709 | sh->forced_local = 1; |
| 5710 | sh->non_elf = 0; |
| 5711 | sh->root.linker_def = 1; |
| 5712 | } |
| 5713 | return TRUE; |
| 5714 | } |
| 5715 | |
| 5716 | /* Allocate NEED contiguous space in .got, and return the offset. |
| 5717 | Handles allocation of the got header when crossing 32k. */ |
| 5718 | |
| 5719 | static bfd_vma |
| 5720 | allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) |
| 5721 | { |
| 5722 | bfd_vma where; |
| 5723 | unsigned int max_before_header; |
| 5724 | |
| 5725 | if (htab->plt_type == PLT_VXWORKS) |
| 5726 | { |
| 5727 | where = htab->got->size; |
| 5728 | htab->got->size += need; |
| 5729 | } |
| 5730 | else |
| 5731 | { |
| 5732 | max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; |
| 5733 | if (need <= htab->got_gap) |
| 5734 | { |
| 5735 | where = max_before_header - htab->got_gap; |
| 5736 | htab->got_gap -= need; |
| 5737 | } |
| 5738 | else |
| 5739 | { |
| 5740 | if (htab->got->size + need > max_before_header |
| 5741 | && htab->got->size <= max_before_header) |
| 5742 | { |
| 5743 | htab->got_gap = max_before_header - htab->got->size; |
| 5744 | htab->got->size = max_before_header + htab->got_header_size; |
| 5745 | } |
| 5746 | where = htab->got->size; |
| 5747 | htab->got->size += need; |
| 5748 | } |
| 5749 | } |
| 5750 | return where; |
| 5751 | } |
| 5752 | |
| 5753 | /* Allocate space in associated reloc sections for dynamic relocs. */ |
| 5754 | |
| 5755 | static bfd_boolean |
| 5756 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 5757 | { |
| 5758 | struct bfd_link_info *info = inf; |
| 5759 | struct ppc_elf_link_hash_entry *eh; |
| 5760 | struct ppc_elf_link_hash_table *htab; |
| 5761 | struct elf_dyn_relocs *p; |
| 5762 | |
| 5763 | if (h->root.type == bfd_link_hash_indirect) |
| 5764 | return TRUE; |
| 5765 | |
| 5766 | htab = ppc_elf_hash_table (info); |
| 5767 | if (htab->elf.dynamic_sections_created |
| 5768 | || h->type == STT_GNU_IFUNC) |
| 5769 | { |
| 5770 | struct plt_entry *ent; |
| 5771 | bfd_boolean doneone = FALSE; |
| 5772 | bfd_vma plt_offset = 0, glink_offset = 0; |
| 5773 | bfd_boolean dyn; |
| 5774 | |
| 5775 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 5776 | if (ent->plt.refcount > 0) |
| 5777 | { |
| 5778 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5779 | if (h->dynindx == -1 |
| 5780 | && !h->forced_local |
| 5781 | && !h->def_regular |
| 5782 | && htab->elf.dynamic_sections_created) |
| 5783 | { |
| 5784 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5785 | return FALSE; |
| 5786 | } |
| 5787 | |
| 5788 | dyn = htab->elf.dynamic_sections_created; |
| 5789 | if (info->shared |
| 5790 | || h->type == STT_GNU_IFUNC |
| 5791 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) |
| 5792 | { |
| 5793 | asection *s = htab->plt; |
| 5794 | if (!dyn || h->dynindx == -1) |
| 5795 | s = htab->iplt; |
| 5796 | |
| 5797 | if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) |
| 5798 | { |
| 5799 | if (!doneone) |
| 5800 | { |
| 5801 | plt_offset = s->size; |
| 5802 | s->size += 4; |
| 5803 | } |
| 5804 | ent->plt.offset = plt_offset; |
| 5805 | |
| 5806 | s = htab->glink; |
| 5807 | if (!doneone || info->shared) |
| 5808 | { |
| 5809 | glink_offset = s->size; |
| 5810 | s->size += GLINK_ENTRY_SIZE; |
| 5811 | if (h == htab->tls_get_addr |
| 5812 | && !htab->params->no_tls_get_addr_opt) |
| 5813 | s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; |
| 5814 | } |
| 5815 | if (!doneone |
| 5816 | && !info->shared |
| 5817 | && h->def_dynamic |
| 5818 | && !h->def_regular) |
| 5819 | { |
| 5820 | h->root.u.def.section = s; |
| 5821 | h->root.u.def.value = glink_offset; |
| 5822 | } |
| 5823 | ent->glink_offset = glink_offset; |
| 5824 | |
| 5825 | if (htab->params->emit_stub_syms |
| 5826 | && !add_stub_sym (ent, h, info)) |
| 5827 | return FALSE; |
| 5828 | } |
| 5829 | else |
| 5830 | { |
| 5831 | if (!doneone) |
| 5832 | { |
| 5833 | /* If this is the first .plt entry, make room |
| 5834 | for the special first entry. */ |
| 5835 | if (s->size == 0) |
| 5836 | s->size += htab->plt_initial_entry_size; |
| 5837 | |
| 5838 | /* The PowerPC PLT is actually composed of two |
| 5839 | parts, the first part is 2 words (for a load |
| 5840 | and a jump), and then there is a remaining |
| 5841 | word available at the end. */ |
| 5842 | plt_offset = (htab->plt_initial_entry_size |
| 5843 | + (htab->plt_slot_size |
| 5844 | * ((s->size |
| 5845 | - htab->plt_initial_entry_size) |
| 5846 | / htab->plt_entry_size))); |
| 5847 | |
| 5848 | /* If this symbol is not defined in a regular |
| 5849 | file, and we are not generating a shared |
| 5850 | library, then set the symbol to this location |
| 5851 | in the .plt. This is to avoid text |
| 5852 | relocations, and is required to make |
| 5853 | function pointers compare as equal between |
| 5854 | the normal executable and the shared library. */ |
| 5855 | if (! info->shared |
| 5856 | && h->def_dynamic |
| 5857 | && !h->def_regular) |
| 5858 | { |
| 5859 | h->root.u.def.section = s; |
| 5860 | h->root.u.def.value = plt_offset; |
| 5861 | } |
| 5862 | |
| 5863 | /* Make room for this entry. */ |
| 5864 | s->size += htab->plt_entry_size; |
| 5865 | /* After the 8192nd entry, room for two entries |
| 5866 | is allocated. */ |
| 5867 | if (htab->plt_type == PLT_OLD |
| 5868 | && (s->size - htab->plt_initial_entry_size) |
| 5869 | / htab->plt_entry_size |
| 5870 | > PLT_NUM_SINGLE_ENTRIES) |
| 5871 | s->size += htab->plt_entry_size; |
| 5872 | } |
| 5873 | ent->plt.offset = plt_offset; |
| 5874 | } |
| 5875 | |
| 5876 | /* We also need to make an entry in the .rela.plt section. */ |
| 5877 | if (!doneone) |
| 5878 | { |
| 5879 | if (!htab->elf.dynamic_sections_created |
| 5880 | || h->dynindx == -1) |
| 5881 | htab->reliplt->size += sizeof (Elf32_External_Rela); |
| 5882 | else |
| 5883 | { |
| 5884 | htab->relplt->size += sizeof (Elf32_External_Rela); |
| 5885 | |
| 5886 | if (htab->plt_type == PLT_VXWORKS) |
| 5887 | { |
| 5888 | /* Allocate space for the unloaded relocations. */ |
| 5889 | if (!info->shared |
| 5890 | && htab->elf.dynamic_sections_created) |
| 5891 | { |
| 5892 | if (ent->plt.offset |
| 5893 | == (bfd_vma) htab->plt_initial_entry_size) |
| 5894 | { |
| 5895 | htab->srelplt2->size |
| 5896 | += (sizeof (Elf32_External_Rela) |
| 5897 | * VXWORKS_PLTRESOLVE_RELOCS); |
| 5898 | } |
| 5899 | |
| 5900 | htab->srelplt2->size |
| 5901 | += (sizeof (Elf32_External_Rela) |
| 5902 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); |
| 5903 | } |
| 5904 | |
| 5905 | /* Every PLT entry has an associated GOT entry in |
| 5906 | .got.plt. */ |
| 5907 | htab->sgotplt->size += 4; |
| 5908 | } |
| 5909 | } |
| 5910 | doneone = TRUE; |
| 5911 | } |
| 5912 | } |
| 5913 | else |
| 5914 | ent->plt.offset = (bfd_vma) -1; |
| 5915 | } |
| 5916 | else |
| 5917 | ent->plt.offset = (bfd_vma) -1; |
| 5918 | |
| 5919 | if (!doneone) |
| 5920 | { |
| 5921 | h->plt.plist = NULL; |
| 5922 | h->needs_plt = 0; |
| 5923 | } |
| 5924 | } |
| 5925 | else |
| 5926 | { |
| 5927 | h->plt.plist = NULL; |
| 5928 | h->needs_plt = 0; |
| 5929 | } |
| 5930 | |
| 5931 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 5932 | if (eh->elf.got.refcount > 0) |
| 5933 | { |
| 5934 | bfd_boolean dyn; |
| 5935 | unsigned int need; |
| 5936 | |
| 5937 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5938 | if (eh->elf.dynindx == -1 |
| 5939 | && !eh->elf.forced_local |
| 5940 | && eh->elf.type != STT_GNU_IFUNC |
| 5941 | && htab->elf.dynamic_sections_created) |
| 5942 | { |
| 5943 | if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) |
| 5944 | return FALSE; |
| 5945 | } |
| 5946 | |
| 5947 | need = 0; |
| 5948 | if ((eh->tls_mask & TLS_TLS) != 0) |
| 5949 | { |
| 5950 | if ((eh->tls_mask & TLS_LD) != 0) |
| 5951 | { |
| 5952 | if (!eh->elf.def_dynamic) |
| 5953 | /* We'll just use htab->tlsld_got.offset. This should |
| 5954 | always be the case. It's a little odd if we have |
| 5955 | a local dynamic reloc against a non-local symbol. */ |
| 5956 | htab->tlsld_got.refcount += 1; |
| 5957 | else |
| 5958 | need += 8; |
| 5959 | } |
| 5960 | if ((eh->tls_mask & TLS_GD) != 0) |
| 5961 | need += 8; |
| 5962 | if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 5963 | need += 4; |
| 5964 | if ((eh->tls_mask & TLS_DTPREL) != 0) |
| 5965 | need += 4; |
| 5966 | } |
| 5967 | else |
| 5968 | need += 4; |
| 5969 | if (need == 0) |
| 5970 | eh->elf.got.offset = (bfd_vma) -1; |
| 5971 | else |
| 5972 | { |
| 5973 | eh->elf.got.offset = allocate_got (htab, need); |
| 5974 | dyn = htab->elf.dynamic_sections_created; |
| 5975 | if ((info->shared |
| 5976 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) |
| 5977 | && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT |
| 5978 | || eh->elf.root.type != bfd_link_hash_undefweak)) |
| 5979 | { |
| 5980 | asection *rsec = htab->relgot; |
| 5981 | |
| 5982 | if (eh->elf.type == STT_GNU_IFUNC) |
| 5983 | rsec = htab->reliplt; |
| 5984 | /* All the entries we allocated need relocs. |
| 5985 | Except LD only needs one. */ |
| 5986 | if ((eh->tls_mask & TLS_LD) != 0 |
| 5987 | && eh->elf.def_dynamic) |
| 5988 | need -= 4; |
| 5989 | rsec->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 5990 | } |
| 5991 | } |
| 5992 | } |
| 5993 | else |
| 5994 | eh->elf.got.offset = (bfd_vma) -1; |
| 5995 | |
| 5996 | if (eh->dyn_relocs == NULL |
| 5997 | || !htab->elf.dynamic_sections_created) |
| 5998 | return TRUE; |
| 5999 | |
| 6000 | /* In the shared -Bsymbolic case, discard space allocated for |
| 6001 | dynamic pc-relative relocs against symbols which turn out to be |
| 6002 | defined in regular objects. For the normal shared case, discard |
| 6003 | space for relocs that have become local due to symbol visibility |
| 6004 | changes. */ |
| 6005 | |
| 6006 | if (info->shared) |
| 6007 | { |
| 6008 | /* Relocs that use pc_count are those that appear on a call insn, |
| 6009 | or certain REL relocs (see must_be_dyn_reloc) that can be |
| 6010 | generated via assembly. We want calls to protected symbols to |
| 6011 | resolve directly to the function rather than going via the plt. |
| 6012 | If people want function pointer comparisons to work as expected |
| 6013 | then they should avoid writing weird assembly. */ |
| 6014 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 6015 | { |
| 6016 | struct elf_dyn_relocs **pp; |
| 6017 | |
| 6018 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 6019 | { |
| 6020 | p->count -= p->pc_count; |
| 6021 | p->pc_count = 0; |
| 6022 | if (p->count == 0) |
| 6023 | *pp = p->next; |
| 6024 | else |
| 6025 | pp = &p->next; |
| 6026 | } |
| 6027 | } |
| 6028 | |
| 6029 | if (htab->is_vxworks) |
| 6030 | { |
| 6031 | struct elf_dyn_relocs **pp; |
| 6032 | |
| 6033 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 6034 | { |
| 6035 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) |
| 6036 | *pp = p->next; |
| 6037 | else |
| 6038 | pp = &p->next; |
| 6039 | } |
| 6040 | } |
| 6041 | |
| 6042 | /* Discard relocs on undefined symbols that must be local. */ |
| 6043 | if (eh->dyn_relocs != NULL |
| 6044 | && h->root.type == bfd_link_hash_undefined |
| 6045 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN |
| 6046 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) |
| 6047 | eh->dyn_relocs = NULL; |
| 6048 | |
| 6049 | /* Also discard relocs on undefined weak syms with non-default |
| 6050 | visibility. */ |
| 6051 | if (eh->dyn_relocs != NULL |
| 6052 | && h->root.type == bfd_link_hash_undefweak) |
| 6053 | { |
| 6054 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 6055 | eh->dyn_relocs = NULL; |
| 6056 | |
| 6057 | /* Make sure undefined weak symbols are output as a dynamic |
| 6058 | symbol in PIEs. */ |
| 6059 | else if (h->dynindx == -1 |
| 6060 | && !h->forced_local |
| 6061 | && !h->def_regular) |
| 6062 | { |
| 6063 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6064 | return FALSE; |
| 6065 | } |
| 6066 | } |
| 6067 | } |
| 6068 | else if (ELIMINATE_COPY_RELOCS) |
| 6069 | { |
| 6070 | /* For the non-shared case, discard space for relocs against |
| 6071 | symbols which turn out to need copy relocs or are not |
| 6072 | dynamic. */ |
| 6073 | |
| 6074 | if (!h->non_got_ref |
| 6075 | && !h->def_regular) |
| 6076 | { |
| 6077 | /* Make sure this symbol is output as a dynamic symbol. |
| 6078 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6079 | if (h->dynindx == -1 |
| 6080 | && !h->forced_local) |
| 6081 | { |
| 6082 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6083 | return FALSE; |
| 6084 | } |
| 6085 | |
| 6086 | /* If that succeeded, we know we'll be keeping all the |
| 6087 | relocs. */ |
| 6088 | if (h->dynindx != -1) |
| 6089 | goto keep; |
| 6090 | } |
| 6091 | |
| 6092 | eh->dyn_relocs = NULL; |
| 6093 | |
| 6094 | keep: ; |
| 6095 | } |
| 6096 | |
| 6097 | /* Finally, allocate space. */ |
| 6098 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 6099 | { |
| 6100 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 6101 | if (eh->elf.type == STT_GNU_IFUNC) |
| 6102 | sreloc = htab->reliplt; |
| 6103 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 6104 | } |
| 6105 | |
| 6106 | return TRUE; |
| 6107 | } |
| 6108 | |
| 6109 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 6110 | read-only sections. */ |
| 6111 | |
| 6112 | static bfd_boolean |
| 6113 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info) |
| 6114 | { |
| 6115 | if (h->root.type == bfd_link_hash_indirect) |
| 6116 | return TRUE; |
| 6117 | |
| 6118 | if (readonly_dynrelocs (h)) |
| 6119 | { |
| 6120 | ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; |
| 6121 | |
| 6122 | /* Not an error, just cut short the traversal. */ |
| 6123 | return FALSE; |
| 6124 | } |
| 6125 | return TRUE; |
| 6126 | } |
| 6127 | |
| 6128 | static const unsigned char glink_eh_frame_cie[] = |
| 6129 | { |
| 6130 | 0, 0, 0, 16, /* length. */ |
| 6131 | 0, 0, 0, 0, /* id. */ |
| 6132 | 1, /* CIE version. */ |
| 6133 | 'z', 'R', 0, /* Augmentation string. */ |
| 6134 | 4, /* Code alignment. */ |
| 6135 | 0x7c, /* Data alignment. */ |
| 6136 | 65, /* RA reg. */ |
| 6137 | 1, /* Augmentation size. */ |
| 6138 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ |
| 6139 | DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ |
| 6140 | }; |
| 6141 | |
| 6142 | /* Set the sizes of the dynamic sections. */ |
| 6143 | |
| 6144 | static bfd_boolean |
| 6145 | ppc_elf_size_dynamic_sections (bfd *output_bfd, |
| 6146 | struct bfd_link_info *info) |
| 6147 | { |
| 6148 | struct ppc_elf_link_hash_table *htab; |
| 6149 | asection *s; |
| 6150 | bfd_boolean relocs; |
| 6151 | bfd *ibfd; |
| 6152 | |
| 6153 | #ifdef DEBUG |
| 6154 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 6155 | #endif |
| 6156 | |
| 6157 | htab = ppc_elf_hash_table (info); |
| 6158 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 6159 | |
| 6160 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6161 | { |
| 6162 | /* Set the contents of the .interp section to the interpreter. */ |
| 6163 | if (info->executable) |
| 6164 | { |
| 6165 | s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); |
| 6166 | BFD_ASSERT (s != NULL); |
| 6167 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 6168 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 6169 | } |
| 6170 | } |
| 6171 | |
| 6172 | if (htab->plt_type == PLT_OLD) |
| 6173 | htab->got_header_size = 16; |
| 6174 | else if (htab->plt_type == PLT_NEW) |
| 6175 | htab->got_header_size = 12; |
| 6176 | |
| 6177 | /* Set up .got offsets for local syms, and space for local dynamic |
| 6178 | relocs. */ |
| 6179 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 6180 | { |
| 6181 | bfd_signed_vma *local_got; |
| 6182 | bfd_signed_vma *end_local_got; |
| 6183 | struct plt_entry **local_plt; |
| 6184 | struct plt_entry **end_local_plt; |
| 6185 | char *lgot_masks; |
| 6186 | bfd_size_type locsymcount; |
| 6187 | Elf_Internal_Shdr *symtab_hdr; |
| 6188 | |
| 6189 | if (!is_ppc_elf (ibfd)) |
| 6190 | continue; |
| 6191 | |
| 6192 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 6193 | { |
| 6194 | struct ppc_dyn_relocs *p; |
| 6195 | |
| 6196 | for (p = ((struct ppc_dyn_relocs *) |
| 6197 | elf_section_data (s)->local_dynrel); |
| 6198 | p != NULL; |
| 6199 | p = p->next) |
| 6200 | { |
| 6201 | if (!bfd_is_abs_section (p->sec) |
| 6202 | && bfd_is_abs_section (p->sec->output_section)) |
| 6203 | { |
| 6204 | /* Input section has been discarded, either because |
| 6205 | it is a copy of a linkonce section or due to |
| 6206 | linker script /DISCARD/, so we'll be discarding |
| 6207 | the relocs too. */ |
| 6208 | } |
| 6209 | else if (htab->is_vxworks |
| 6210 | && strcmp (p->sec->output_section->name, |
| 6211 | ".tls_vars") == 0) |
| 6212 | { |
| 6213 | /* Relocations in vxworks .tls_vars sections are |
| 6214 | handled specially by the loader. */ |
| 6215 | } |
| 6216 | else if (p->count != 0) |
| 6217 | { |
| 6218 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 6219 | if (p->ifunc) |
| 6220 | sreloc = htab->reliplt; |
| 6221 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 6222 | if ((p->sec->output_section->flags |
| 6223 | & (SEC_READONLY | SEC_ALLOC)) |
| 6224 | == (SEC_READONLY | SEC_ALLOC)) |
| 6225 | info->flags |= DF_TEXTREL; |
| 6226 | } |
| 6227 | } |
| 6228 | } |
| 6229 | |
| 6230 | local_got = elf_local_got_refcounts (ibfd); |
| 6231 | if (!local_got) |
| 6232 | continue; |
| 6233 | |
| 6234 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 6235 | locsymcount = symtab_hdr->sh_info; |
| 6236 | end_local_got = local_got + locsymcount; |
| 6237 | local_plt = (struct plt_entry **) end_local_got; |
| 6238 | end_local_plt = local_plt + locsymcount; |
| 6239 | lgot_masks = (char *) end_local_plt; |
| 6240 | |
| 6241 | for (; local_got < end_local_got; ++local_got, ++lgot_masks) |
| 6242 | if (*local_got > 0) |
| 6243 | { |
| 6244 | unsigned int need = 0; |
| 6245 | if ((*lgot_masks & TLS_TLS) != 0) |
| 6246 | { |
| 6247 | if ((*lgot_masks & TLS_GD) != 0) |
| 6248 | need += 8; |
| 6249 | if ((*lgot_masks & TLS_LD) != 0) |
| 6250 | htab->tlsld_got.refcount += 1; |
| 6251 | if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 6252 | need += 4; |
| 6253 | if ((*lgot_masks & TLS_DTPREL) != 0) |
| 6254 | need += 4; |
| 6255 | } |
| 6256 | else |
| 6257 | need += 4; |
| 6258 | if (need == 0) |
| 6259 | *local_got = (bfd_vma) -1; |
| 6260 | else |
| 6261 | { |
| 6262 | *local_got = allocate_got (htab, need); |
| 6263 | if (info->shared) |
| 6264 | { |
| 6265 | asection *srel = htab->relgot; |
| 6266 | if ((*lgot_masks & PLT_IFUNC) != 0) |
| 6267 | srel = htab->reliplt; |
| 6268 | srel->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 6269 | } |
| 6270 | } |
| 6271 | } |
| 6272 | else |
| 6273 | *local_got = (bfd_vma) -1; |
| 6274 | |
| 6275 | if (htab->is_vxworks) |
| 6276 | continue; |
| 6277 | |
| 6278 | /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ |
| 6279 | for (; local_plt < end_local_plt; ++local_plt) |
| 6280 | { |
| 6281 | struct plt_entry *ent; |
| 6282 | bfd_boolean doneone = FALSE; |
| 6283 | bfd_vma plt_offset = 0, glink_offset = 0; |
| 6284 | |
| 6285 | for (ent = *local_plt; ent != NULL; ent = ent->next) |
| 6286 | if (ent->plt.refcount > 0) |
| 6287 | { |
| 6288 | s = htab->iplt; |
| 6289 | |
| 6290 | if (!doneone) |
| 6291 | { |
| 6292 | plt_offset = s->size; |
| 6293 | s->size += 4; |
| 6294 | } |
| 6295 | ent->plt.offset = plt_offset; |
| 6296 | |
| 6297 | s = htab->glink; |
| 6298 | if (!doneone || info->shared) |
| 6299 | { |
| 6300 | glink_offset = s->size; |
| 6301 | s->size += GLINK_ENTRY_SIZE; |
| 6302 | } |
| 6303 | ent->glink_offset = glink_offset; |
| 6304 | |
| 6305 | if (!doneone) |
| 6306 | { |
| 6307 | htab->reliplt->size += sizeof (Elf32_External_Rela); |
| 6308 | doneone = TRUE; |
| 6309 | } |
| 6310 | } |
| 6311 | else |
| 6312 | ent->plt.offset = (bfd_vma) -1; |
| 6313 | } |
| 6314 | } |
| 6315 | |
| 6316 | /* Allocate space for global sym dynamic relocs. */ |
| 6317 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); |
| 6318 | |
| 6319 | if (htab->tlsld_got.refcount > 0) |
| 6320 | { |
| 6321 | htab->tlsld_got.offset = allocate_got (htab, 8); |
| 6322 | if (info->shared) |
| 6323 | htab->relgot->size += sizeof (Elf32_External_Rela); |
| 6324 | } |
| 6325 | else |
| 6326 | htab->tlsld_got.offset = (bfd_vma) -1; |
| 6327 | |
| 6328 | if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) |
| 6329 | { |
| 6330 | unsigned int g_o_t = 32768; |
| 6331 | |
| 6332 | /* If we haven't allocated the header, do so now. When we get here, |
| 6333 | for old plt/got the got size will be 0 to 32764 (not allocated), |
| 6334 | or 32780 to 65536 (header allocated). For new plt/got, the |
| 6335 | corresponding ranges are 0 to 32768 and 32780 to 65536. */ |
| 6336 | if (htab->got->size <= 32768) |
| 6337 | { |
| 6338 | g_o_t = htab->got->size; |
| 6339 | if (htab->plt_type == PLT_OLD) |
| 6340 | g_o_t += 4; |
| 6341 | htab->got->size += htab->got_header_size; |
| 6342 | } |
| 6343 | |
| 6344 | htab->elf.hgot->root.u.def.value = g_o_t; |
| 6345 | } |
| 6346 | if (info->shared) |
| 6347 | { |
| 6348 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 6349 | |
| 6350 | sda->root.u.def.section = htab->elf.hgot->root.u.def.section; |
| 6351 | sda->root.u.def.value = htab->elf.hgot->root.u.def.value; |
| 6352 | } |
| 6353 | if (info->emitrelocations) |
| 6354 | { |
| 6355 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 6356 | |
| 6357 | if (sda != NULL && sda->ref_regular) |
| 6358 | sda->root.u.def.section->flags |= SEC_KEEP; |
| 6359 | sda = htab->sdata[1].sym; |
| 6360 | if (sda != NULL && sda->ref_regular) |
| 6361 | sda->root.u.def.section->flags |= SEC_KEEP; |
| 6362 | } |
| 6363 | |
| 6364 | if (htab->glink != NULL |
| 6365 | && htab->glink->size != 0 |
| 6366 | && htab->elf.dynamic_sections_created) |
| 6367 | { |
| 6368 | htab->glink_pltresolve = htab->glink->size; |
| 6369 | /* Space for the branch table. */ |
| 6370 | htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; |
| 6371 | /* Pad out to align the start of PLTresolve. */ |
| 6372 | htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround |
| 6373 | ? 63 : 15); |
| 6374 | htab->glink->size += GLINK_PLTRESOLVE; |
| 6375 | |
| 6376 | if (htab->params->emit_stub_syms) |
| 6377 | { |
| 6378 | struct elf_link_hash_entry *sh; |
| 6379 | sh = elf_link_hash_lookup (&htab->elf, "__glink", |
| 6380 | TRUE, FALSE, FALSE); |
| 6381 | if (sh == NULL) |
| 6382 | return FALSE; |
| 6383 | if (sh->root.type == bfd_link_hash_new) |
| 6384 | { |
| 6385 | sh->root.type = bfd_link_hash_defined; |
| 6386 | sh->root.u.def.section = htab->glink; |
| 6387 | sh->root.u.def.value = htab->glink_pltresolve; |
| 6388 | sh->ref_regular = 1; |
| 6389 | sh->def_regular = 1; |
| 6390 | sh->ref_regular_nonweak = 1; |
| 6391 | sh->forced_local = 1; |
| 6392 | sh->non_elf = 0; |
| 6393 | sh->root.linker_def = 1; |
| 6394 | } |
| 6395 | sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", |
| 6396 | TRUE, FALSE, FALSE); |
| 6397 | if (sh == NULL) |
| 6398 | return FALSE; |
| 6399 | if (sh->root.type == bfd_link_hash_new) |
| 6400 | { |
| 6401 | sh->root.type = bfd_link_hash_defined; |
| 6402 | sh->root.u.def.section = htab->glink; |
| 6403 | sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; |
| 6404 | sh->ref_regular = 1; |
| 6405 | sh->def_regular = 1; |
| 6406 | sh->ref_regular_nonweak = 1; |
| 6407 | sh->forced_local = 1; |
| 6408 | sh->non_elf = 0; |
| 6409 | sh->root.linker_def = 1; |
| 6410 | } |
| 6411 | } |
| 6412 | } |
| 6413 | |
| 6414 | if (htab->glink != NULL |
| 6415 | && htab->glink->size != 0 |
| 6416 | && htab->glink_eh_frame != NULL |
| 6417 | && !bfd_is_abs_section (htab->glink_eh_frame->output_section) |
| 6418 | && _bfd_elf_eh_frame_present (info)) |
| 6419 | { |
| 6420 | s = htab->glink_eh_frame; |
| 6421 | s->size = sizeof (glink_eh_frame_cie) + 20; |
| 6422 | if (info->shared) |
| 6423 | { |
| 6424 | s->size += 4; |
| 6425 | if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) |
| 6426 | s->size += 4; |
| 6427 | } |
| 6428 | } |
| 6429 | |
| 6430 | /* We've now determined the sizes of the various dynamic sections. |
| 6431 | Allocate memory for them. */ |
| 6432 | relocs = FALSE; |
| 6433 | for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) |
| 6434 | { |
| 6435 | bfd_boolean strip_section = TRUE; |
| 6436 | |
| 6437 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 6438 | continue; |
| 6439 | |
| 6440 | if (s == htab->plt |
| 6441 | || s == htab->got) |
| 6442 | { |
| 6443 | /* We'd like to strip these sections if they aren't needed, but if |
| 6444 | we've exported dynamic symbols from them we must leave them. |
| 6445 | It's too late to tell BFD to get rid of the symbols. */ |
| 6446 | if (htab->elf.hplt != NULL) |
| 6447 | strip_section = FALSE; |
| 6448 | /* Strip this section if we don't need it; see the |
| 6449 | comment below. */ |
| 6450 | } |
| 6451 | else if (s == htab->iplt |
| 6452 | || s == htab->glink |
| 6453 | || s == htab->glink_eh_frame |
| 6454 | || s == htab->sgotplt |
| 6455 | || s == htab->sbss |
| 6456 | || s == htab->dynbss |
| 6457 | || s == htab->dynsbss) |
| 6458 | { |
| 6459 | /* Strip these too. */ |
| 6460 | } |
| 6461 | else if (s == htab->sdata[0].section |
| 6462 | || s == htab->sdata[1].section) |
| 6463 | { |
| 6464 | strip_section = (s->flags & SEC_KEEP) == 0; |
| 6465 | } |
| 6466 | else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), |
| 6467 | ".rela")) |
| 6468 | { |
| 6469 | if (s->size != 0) |
| 6470 | { |
| 6471 | /* Remember whether there are any relocation sections. */ |
| 6472 | relocs = TRUE; |
| 6473 | |
| 6474 | /* We use the reloc_count field as a counter if we need |
| 6475 | to copy relocs into the output file. */ |
| 6476 | s->reloc_count = 0; |
| 6477 | } |
| 6478 | } |
| 6479 | else |
| 6480 | { |
| 6481 | /* It's not one of our sections, so don't allocate space. */ |
| 6482 | continue; |
| 6483 | } |
| 6484 | |
| 6485 | if (s->size == 0 && strip_section) |
| 6486 | { |
| 6487 | /* If we don't need this section, strip it from the |
| 6488 | output file. This is mostly to handle .rela.bss and |
| 6489 | .rela.plt. We must create both sections in |
| 6490 | create_dynamic_sections, because they must be created |
| 6491 | before the linker maps input sections to output |
| 6492 | sections. The linker does that before |
| 6493 | adjust_dynamic_symbol is called, and it is that |
| 6494 | function which decides whether anything needs to go |
| 6495 | into these sections. */ |
| 6496 | s->flags |= SEC_EXCLUDE; |
| 6497 | continue; |
| 6498 | } |
| 6499 | |
| 6500 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 6501 | continue; |
| 6502 | |
| 6503 | /* Allocate memory for the section contents. */ |
| 6504 | s->contents = bfd_zalloc (htab->elf.dynobj, s->size); |
| 6505 | if (s->contents == NULL) |
| 6506 | return FALSE; |
| 6507 | } |
| 6508 | |
| 6509 | if (htab->elf.dynamic_sections_created) |
| 6510 | { |
| 6511 | /* Add some entries to the .dynamic section. We fill in the |
| 6512 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 6513 | must add the entries now so that we get the correct size for |
| 6514 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 6515 | dynamic linker and used by the debugger. */ |
| 6516 | #define add_dynamic_entry(TAG, VAL) \ |
| 6517 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 6518 | |
| 6519 | if (info->executable) |
| 6520 | { |
| 6521 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 6522 | return FALSE; |
| 6523 | } |
| 6524 | |
| 6525 | if (htab->plt != NULL && htab->plt->size != 0) |
| 6526 | { |
| 6527 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 6528 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 6529 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 6530 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 6531 | return FALSE; |
| 6532 | } |
| 6533 | |
| 6534 | if (htab->plt_type == PLT_NEW |
| 6535 | && htab->glink != NULL |
| 6536 | && htab->glink->size != 0) |
| 6537 | { |
| 6538 | if (!add_dynamic_entry (DT_PPC_GOT, 0)) |
| 6539 | return FALSE; |
| 6540 | if (!htab->params->no_tls_get_addr_opt |
| 6541 | && htab->tls_get_addr != NULL |
| 6542 | && htab->tls_get_addr->plt.plist != NULL |
| 6543 | && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS)) |
| 6544 | return FALSE; |
| 6545 | } |
| 6546 | |
| 6547 | if (relocs) |
| 6548 | { |
| 6549 | if (!add_dynamic_entry (DT_RELA, 0) |
| 6550 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 6551 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 6552 | return FALSE; |
| 6553 | } |
| 6554 | |
| 6555 | /* If any dynamic relocs apply to a read-only section, then we |
| 6556 | need a DT_TEXTREL entry. */ |
| 6557 | if ((info->flags & DF_TEXTREL) == 0) |
| 6558 | elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, |
| 6559 | info); |
| 6560 | |
| 6561 | if ((info->flags & DF_TEXTREL) != 0) |
| 6562 | { |
| 6563 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 6564 | return FALSE; |
| 6565 | } |
| 6566 | if (htab->is_vxworks |
| 6567 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
| 6568 | return FALSE; |
| 6569 | } |
| 6570 | #undef add_dynamic_entry |
| 6571 | |
| 6572 | if (htab->glink_eh_frame != NULL |
| 6573 | && htab->glink_eh_frame->contents != NULL) |
| 6574 | { |
| 6575 | unsigned char *p = htab->glink_eh_frame->contents; |
| 6576 | bfd_vma val; |
| 6577 | |
| 6578 | memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); |
| 6579 | /* CIE length (rewrite in case little-endian). */ |
| 6580 | bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); |
| 6581 | p += sizeof (glink_eh_frame_cie); |
| 6582 | /* FDE length. */ |
| 6583 | val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); |
| 6584 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 6585 | p += 4; |
| 6586 | /* CIE pointer. */ |
| 6587 | val = p - htab->glink_eh_frame->contents; |
| 6588 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 6589 | p += 4; |
| 6590 | /* Offset to .glink. Set later. */ |
| 6591 | p += 4; |
| 6592 | /* .glink size. */ |
| 6593 | bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); |
| 6594 | p += 4; |
| 6595 | /* Augmentation. */ |
| 6596 | p += 1; |
| 6597 | |
| 6598 | if (info->shared |
| 6599 | && htab->elf.dynamic_sections_created) |
| 6600 | { |
| 6601 | bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; |
| 6602 | if (adv < 64) |
| 6603 | *p++ = DW_CFA_advance_loc + adv; |
| 6604 | else if (adv < 256) |
| 6605 | { |
| 6606 | *p++ = DW_CFA_advance_loc1; |
| 6607 | *p++ = adv; |
| 6608 | } |
| 6609 | else if (adv < 65536) |
| 6610 | { |
| 6611 | *p++ = DW_CFA_advance_loc2; |
| 6612 | bfd_put_16 (htab->elf.dynobj, adv, p); |
| 6613 | p += 2; |
| 6614 | } |
| 6615 | else |
| 6616 | { |
| 6617 | *p++ = DW_CFA_advance_loc4; |
| 6618 | bfd_put_32 (htab->elf.dynobj, adv, p); |
| 6619 | p += 4; |
| 6620 | } |
| 6621 | *p++ = DW_CFA_register; |
| 6622 | *p++ = 65; |
| 6623 | p++; |
| 6624 | *p++ = DW_CFA_advance_loc + 4; |
| 6625 | *p++ = DW_CFA_restore_extended; |
| 6626 | *p++ = 65; |
| 6627 | } |
| 6628 | BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) |
| 6629 | == htab->glink_eh_frame->size); |
| 6630 | } |
| 6631 | |
| 6632 | return TRUE; |
| 6633 | } |
| 6634 | |
| 6635 | /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output |
| 6636 | if it looks like nothing is using them. */ |
| 6637 | |
| 6638 | static void |
| 6639 | maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect) |
| 6640 | { |
| 6641 | struct elf_link_hash_entry *sda = lsect->sym; |
| 6642 | |
| 6643 | if (sda != NULL && !sda->ref_regular && sda->dynindx == -1) |
| 6644 | { |
| 6645 | asection *s; |
| 6646 | |
| 6647 | s = bfd_get_section_by_name (output_bfd, lsect->name); |
| 6648 | if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) |
| 6649 | { |
| 6650 | s = bfd_get_section_by_name (output_bfd, lsect->bss_name); |
| 6651 | if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) |
| 6652 | { |
| 6653 | sda->def_regular = 0; |
| 6654 | /* This is somewhat magic. See elf_link_output_extsym. */ |
| 6655 | sda->ref_dynamic = 1; |
| 6656 | sda->forced_local = 0; |
| 6657 | } |
| 6658 | } |
| 6659 | } |
| 6660 | } |
| 6661 | |
| 6662 | void |
| 6663 | ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info) |
| 6664 | { |
| 6665 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 6666 | |
| 6667 | if (htab != NULL) |
| 6668 | { |
| 6669 | maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]); |
| 6670 | maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]); |
| 6671 | } |
| 6672 | } |
| 6673 | |
| 6674 | |
| 6675 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
| 6676 | |
| 6677 | static bfd_boolean |
| 6678 | ppc_elf_hash_symbol (struct elf_link_hash_entry *h) |
| 6679 | { |
| 6680 | if (h->plt.plist != NULL |
| 6681 | && !h->def_regular |
| 6682 | && (!h->pointer_equality_needed |
| 6683 | || !h->ref_regular_nonweak)) |
| 6684 | return FALSE; |
| 6685 | |
| 6686 | return _bfd_elf_hash_symbol (h); |
| 6687 | } |
| 6688 | \f |
| 6689 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
| 6690 | |
| 6691 | /* Relaxation trampolines. r12 is available for clobbering (r11, is |
| 6692 | used for some functions that are allowed to break the ABI). */ |
| 6693 | static const int shared_stub_entry[] = |
| 6694 | { |
| 6695 | 0x7c0802a6, /* mflr 0 */ |
| 6696 | 0x429f0005, /* bcl 20, 31, .Lxxx */ |
| 6697 | 0x7d8802a6, /* mflr 12 */ |
| 6698 | 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ |
| 6699 | 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */ |
| 6700 | 0x7c0803a6, /* mtlr 0 */ |
| 6701 | 0x7d8903a6, /* mtctr 12 */ |
| 6702 | 0x4e800420, /* bctr */ |
| 6703 | }; |
| 6704 | |
| 6705 | static const int stub_entry[] = |
| 6706 | { |
| 6707 | 0x3d800000, /* lis 12,xxx@ha */ |
| 6708 | 0x398c0000, /* addi 12,12,xxx@l */ |
| 6709 | 0x7d8903a6, /* mtctr 12 */ |
| 6710 | 0x4e800420, /* bctr */ |
| 6711 | }; |
| 6712 | |
| 6713 | struct ppc_elf_relax_info |
| 6714 | { |
| 6715 | unsigned int workaround_size; |
| 6716 | }; |
| 6717 | |
| 6718 | /* This function implements long branch trampolines, and the ppc476 |
| 6719 | icache bug workaround. Any section needing trampolines or patch |
| 6720 | space for the workaround has its size extended so that we can |
| 6721 | add trampolines at the end of the section. */ |
| 6722 | |
| 6723 | static bfd_boolean |
| 6724 | ppc_elf_relax_section (bfd *abfd, |
| 6725 | asection *isec, |
| 6726 | struct bfd_link_info *link_info, |
| 6727 | bfd_boolean *again) |
| 6728 | { |
| 6729 | struct one_fixup |
| 6730 | { |
| 6731 | struct one_fixup *next; |
| 6732 | asection *tsec; |
| 6733 | /* Final link, can use the symbol offset. For a |
| 6734 | relocatable link we use the symbol's index. */ |
| 6735 | bfd_vma toff; |
| 6736 | bfd_vma trampoff; |
| 6737 | }; |
| 6738 | |
| 6739 | Elf_Internal_Shdr *symtab_hdr; |
| 6740 | bfd_byte *contents = NULL; |
| 6741 | Elf_Internal_Sym *isymbuf = NULL; |
| 6742 | Elf_Internal_Rela *internal_relocs = NULL; |
| 6743 | Elf_Internal_Rela *irel, *irelend = NULL; |
| 6744 | struct one_fixup *fixups = NULL; |
| 6745 | struct ppc_elf_relax_info *relax_info = NULL; |
| 6746 | unsigned changes = 0; |
| 6747 | bfd_boolean workaround_change; |
| 6748 | struct ppc_elf_link_hash_table *htab; |
| 6749 | bfd_size_type trampbase, trampoff, newsize; |
| 6750 | asection *got2; |
| 6751 | bfd_boolean maybe_pasted; |
| 6752 | |
| 6753 | *again = FALSE; |
| 6754 | |
| 6755 | /* No need to do anything with non-alloc or non-code sections. */ |
| 6756 | if ((isec->flags & SEC_ALLOC) == 0 |
| 6757 | || (isec->flags & SEC_CODE) == 0 |
| 6758 | || (isec->flags & SEC_LINKER_CREATED) != 0 |
| 6759 | || isec->size < 4) |
| 6760 | return TRUE; |
| 6761 | |
| 6762 | /* We cannot represent the required PIC relocs in the output, so don't |
| 6763 | do anything. The linker doesn't support mixing -shared and -r |
| 6764 | anyway. */ |
| 6765 | if (link_info->relocatable && link_info->shared) |
| 6766 | return TRUE; |
| 6767 | |
| 6768 | htab = ppc_elf_hash_table (link_info); |
| 6769 | if (htab == NULL) |
| 6770 | return TRUE; |
| 6771 | |
| 6772 | isec->size = (isec->size + 3) & -4; |
| 6773 | if (isec->rawsize == 0) |
| 6774 | isec->rawsize = isec->size; |
| 6775 | trampbase = isec->size; |
| 6776 | |
| 6777 | BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE |
| 6778 | || isec->sec_info_type == SEC_INFO_TYPE_TARGET); |
| 6779 | isec->sec_info_type = SEC_INFO_TYPE_TARGET; |
| 6780 | |
| 6781 | if (htab->params->ppc476_workaround) |
| 6782 | { |
| 6783 | if (elf_section_data (isec)->sec_info == NULL) |
| 6784 | { |
| 6785 | elf_section_data (isec)->sec_info |
| 6786 | = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info)); |
| 6787 | if (elf_section_data (isec)->sec_info == NULL) |
| 6788 | return FALSE; |
| 6789 | } |
| 6790 | relax_info = elf_section_data (isec)->sec_info; |
| 6791 | trampbase -= relax_info->workaround_size; |
| 6792 | } |
| 6793 | |
| 6794 | maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 |
| 6795 | || strcmp (isec->output_section->name, ".fini") == 0); |
| 6796 | /* Space for a branch around any trampolines. */ |
| 6797 | trampoff = trampbase; |
| 6798 | if (maybe_pasted && trampbase == isec->rawsize) |
| 6799 | trampoff += 4; |
| 6800 | |
| 6801 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 6802 | |
| 6803 | if (htab->params->branch_trampolines) |
| 6804 | { |
| 6805 | /* Get a copy of the native relocations. */ |
| 6806 | if (isec->reloc_count != 0) |
| 6807 | { |
| 6808 | internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, |
| 6809 | link_info->keep_memory); |
| 6810 | if (internal_relocs == NULL) |
| 6811 | goto error_return; |
| 6812 | } |
| 6813 | |
| 6814 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 6815 | |
| 6816 | irelend = internal_relocs + isec->reloc_count; |
| 6817 | for (irel = internal_relocs; irel < irelend; irel++) |
| 6818 | { |
| 6819 | unsigned long r_type = ELF32_R_TYPE (irel->r_info); |
| 6820 | bfd_vma toff, roff; |
| 6821 | asection *tsec; |
| 6822 | struct one_fixup *f; |
| 6823 | size_t insn_offset = 0; |
| 6824 | bfd_vma max_branch_offset, val; |
| 6825 | bfd_byte *hit_addr; |
| 6826 | unsigned long t0; |
| 6827 | struct elf_link_hash_entry *h; |
| 6828 | struct plt_entry **plist; |
| 6829 | unsigned char sym_type; |
| 6830 | |
| 6831 | switch (r_type) |
| 6832 | { |
| 6833 | case R_PPC_REL24: |
| 6834 | case R_PPC_LOCAL24PC: |
| 6835 | case R_PPC_PLTREL24: |
| 6836 | max_branch_offset = 1 << 25; |
| 6837 | break; |
| 6838 | |
| 6839 | case R_PPC_REL14: |
| 6840 | case R_PPC_REL14_BRTAKEN: |
| 6841 | case R_PPC_REL14_BRNTAKEN: |
| 6842 | max_branch_offset = 1 << 15; |
| 6843 | break; |
| 6844 | |
| 6845 | default: |
| 6846 | continue; |
| 6847 | } |
| 6848 | |
| 6849 | /* Get the value of the symbol referred to by the reloc. */ |
| 6850 | h = NULL; |
| 6851 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 6852 | { |
| 6853 | /* A local symbol. */ |
| 6854 | Elf_Internal_Sym *isym; |
| 6855 | |
| 6856 | /* Read this BFD's local symbols. */ |
| 6857 | if (isymbuf == NULL) |
| 6858 | { |
| 6859 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 6860 | if (isymbuf == NULL) |
| 6861 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 6862 | symtab_hdr->sh_info, 0, |
| 6863 | NULL, NULL, NULL); |
| 6864 | if (isymbuf == 0) |
| 6865 | goto error_return; |
| 6866 | } |
| 6867 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 6868 | if (isym->st_shndx == SHN_UNDEF) |
| 6869 | tsec = bfd_und_section_ptr; |
| 6870 | else if (isym->st_shndx == SHN_ABS) |
| 6871 | tsec = bfd_abs_section_ptr; |
| 6872 | else if (isym->st_shndx == SHN_COMMON) |
| 6873 | tsec = bfd_com_section_ptr; |
| 6874 | else |
| 6875 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 6876 | |
| 6877 | toff = isym->st_value; |
| 6878 | sym_type = ELF_ST_TYPE (isym->st_info); |
| 6879 | } |
| 6880 | else |
| 6881 | { |
| 6882 | /* Global symbol handling. */ |
| 6883 | unsigned long indx; |
| 6884 | |
| 6885 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 6886 | h = elf_sym_hashes (abfd)[indx]; |
| 6887 | |
| 6888 | while (h->root.type == bfd_link_hash_indirect |
| 6889 | || h->root.type == bfd_link_hash_warning) |
| 6890 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6891 | |
| 6892 | if (h->root.type == bfd_link_hash_defined |
| 6893 | || h->root.type == bfd_link_hash_defweak) |
| 6894 | { |
| 6895 | tsec = h->root.u.def.section; |
| 6896 | toff = h->root.u.def.value; |
| 6897 | } |
| 6898 | else if (h->root.type == bfd_link_hash_undefined |
| 6899 | || h->root.type == bfd_link_hash_undefweak) |
| 6900 | { |
| 6901 | tsec = bfd_und_section_ptr; |
| 6902 | toff = link_info->relocatable ? indx : 0; |
| 6903 | } |
| 6904 | else |
| 6905 | continue; |
| 6906 | |
| 6907 | /* If this branch is to __tls_get_addr then we may later |
| 6908 | optimise away the call. We won't be needing a long- |
| 6909 | branch stub in that case. */ |
| 6910 | if (link_info->executable |
| 6911 | && !link_info->relocatable |
| 6912 | && h == htab->tls_get_addr |
| 6913 | && irel != internal_relocs) |
| 6914 | { |
| 6915 | unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); |
| 6916 | unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); |
| 6917 | unsigned int tls_mask = 0; |
| 6918 | |
| 6919 | /* The previous reloc should be one of R_PPC_TLSGD or |
| 6920 | R_PPC_TLSLD, or for older object files, a reloc |
| 6921 | on the __tls_get_addr arg setup insn. Get tls |
| 6922 | mask bits from the symbol on that reloc. */ |
| 6923 | if (t_symndx < symtab_hdr->sh_info) |
| 6924 | { |
| 6925 | bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); |
| 6926 | |
| 6927 | if (local_got_offsets != NULL) |
| 6928 | { |
| 6929 | struct plt_entry **local_plt = (struct plt_entry **) |
| 6930 | (local_got_offsets + symtab_hdr->sh_info); |
| 6931 | char *lgot_masks = (char *) |
| 6932 | (local_plt + symtab_hdr->sh_info); |
| 6933 | tls_mask = lgot_masks[t_symndx]; |
| 6934 | } |
| 6935 | } |
| 6936 | else |
| 6937 | { |
| 6938 | struct elf_link_hash_entry *th |
| 6939 | = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; |
| 6940 | |
| 6941 | while (th->root.type == bfd_link_hash_indirect |
| 6942 | || th->root.type == bfd_link_hash_warning) |
| 6943 | th = (struct elf_link_hash_entry *) th->root.u.i.link; |
| 6944 | |
| 6945 | tls_mask |
| 6946 | = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; |
| 6947 | } |
| 6948 | |
| 6949 | /* The mask bits tell us if the call will be |
| 6950 | optimised away. */ |
| 6951 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
| 6952 | && (t_rtype == R_PPC_TLSGD |
| 6953 | || t_rtype == R_PPC_GOT_TLSGD16 |
| 6954 | || t_rtype == R_PPC_GOT_TLSGD16_LO)) |
| 6955 | continue; |
| 6956 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
| 6957 | && (t_rtype == R_PPC_TLSLD |
| 6958 | || t_rtype == R_PPC_GOT_TLSLD16 |
| 6959 | || t_rtype == R_PPC_GOT_TLSLD16_LO)) |
| 6960 | continue; |
| 6961 | } |
| 6962 | |
| 6963 | sym_type = h->type; |
| 6964 | } |
| 6965 | |
| 6966 | /* The condition here under which we call find_plt_ent must |
| 6967 | match that in relocate_section. If we call find_plt_ent here |
| 6968 | but not in relocate_section, or vice versa, then the branch |
| 6969 | destination used here may be incorrect. */ |
| 6970 | plist = NULL; |
| 6971 | if (h != NULL) |
| 6972 | { |
| 6973 | /* We know is_branch_reloc (r_type) is true. */ |
| 6974 | if (h->type == STT_GNU_IFUNC |
| 6975 | || r_type == R_PPC_PLTREL24) |
| 6976 | plist = &h->plt.plist; |
| 6977 | } |
| 6978 | else if (sym_type == STT_GNU_IFUNC |
| 6979 | && elf_local_got_offsets (abfd) != NULL) |
| 6980 | { |
| 6981 | bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); |
| 6982 | struct plt_entry **local_plt = (struct plt_entry **) |
| 6983 | (local_got_offsets + symtab_hdr->sh_info); |
| 6984 | plist = local_plt + ELF32_R_SYM (irel->r_info); |
| 6985 | } |
| 6986 | if (plist != NULL) |
| 6987 | { |
| 6988 | bfd_vma addend = 0; |
| 6989 | struct plt_entry *ent; |
| 6990 | |
| 6991 | if (r_type == R_PPC_PLTREL24 && link_info->shared) |
| 6992 | addend = irel->r_addend; |
| 6993 | ent = find_plt_ent (plist, got2, addend); |
| 6994 | if (ent != NULL) |
| 6995 | { |
| 6996 | if (htab->plt_type == PLT_NEW |
| 6997 | || h == NULL |
| 6998 | || !htab->elf.dynamic_sections_created |
| 6999 | || h->dynindx == -1) |
| 7000 | { |
| 7001 | tsec = htab->glink; |
| 7002 | toff = ent->glink_offset; |
| 7003 | } |
| 7004 | else |
| 7005 | { |
| 7006 | tsec = htab->plt; |
| 7007 | toff = ent->plt.offset; |
| 7008 | } |
| 7009 | } |
| 7010 | } |
| 7011 | |
| 7012 | /* If the branch and target are in the same section, you have |
| 7013 | no hope of adding stubs. We'll error out later should the |
| 7014 | branch overflow. */ |
| 7015 | if (tsec == isec) |
| 7016 | continue; |
| 7017 | |
| 7018 | /* There probably isn't any reason to handle symbols in |
| 7019 | SEC_MERGE sections; SEC_MERGE doesn't seem a likely |
| 7020 | attribute for a code section, and we are only looking at |
| 7021 | branches. However, implement it correctly here as a |
| 7022 | reference for other target relax_section functions. */ |
| 7023 | if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) |
| 7024 | { |
| 7025 | /* At this stage in linking, no SEC_MERGE symbol has been |
| 7026 | adjusted, so all references to such symbols need to be |
| 7027 | passed through _bfd_merged_section_offset. (Later, in |
| 7028 | relocate_section, all SEC_MERGE symbols *except* for |
| 7029 | section symbols have been adjusted.) |
| 7030 | |
| 7031 | gas may reduce relocations against symbols in SEC_MERGE |
| 7032 | sections to a relocation against the section symbol when |
| 7033 | the original addend was zero. When the reloc is against |
| 7034 | a section symbol we should include the addend in the |
| 7035 | offset passed to _bfd_merged_section_offset, since the |
| 7036 | location of interest is the original symbol. On the |
| 7037 | other hand, an access to "sym+addend" where "sym" is not |
| 7038 | a section symbol should not include the addend; Such an |
| 7039 | access is presumed to be an offset from "sym"; The |
| 7040 | location of interest is just "sym". */ |
| 7041 | if (sym_type == STT_SECTION) |
| 7042 | toff += irel->r_addend; |
| 7043 | |
| 7044 | toff |
| 7045 | = _bfd_merged_section_offset (abfd, &tsec, |
| 7046 | elf_section_data (tsec)->sec_info, |
| 7047 | toff); |
| 7048 | |
| 7049 | if (sym_type != STT_SECTION) |
| 7050 | toff += irel->r_addend; |
| 7051 | } |
| 7052 | /* PLTREL24 addends are special. */ |
| 7053 | else if (r_type != R_PPC_PLTREL24) |
| 7054 | toff += irel->r_addend; |
| 7055 | |
| 7056 | /* Attempted -shared link of non-pic code loses. */ |
| 7057 | if ((!link_info->relocatable |
| 7058 | && tsec == bfd_und_section_ptr) |
| 7059 | || tsec->output_section == NULL |
| 7060 | || (tsec->owner != NULL |
| 7061 | && (tsec->owner->flags & BFD_PLUGIN) != 0)) |
| 7062 | continue; |
| 7063 | |
| 7064 | roff = irel->r_offset; |
| 7065 | |
| 7066 | /* If the branch is in range, no need to do anything. */ |
| 7067 | if (tsec != bfd_und_section_ptr |
| 7068 | && (!link_info->relocatable |
| 7069 | /* A relocatable link may have sections moved during |
| 7070 | final link, so do not presume they remain in range. */ |
| 7071 | || tsec->output_section == isec->output_section)) |
| 7072 | { |
| 7073 | bfd_vma symaddr, reladdr; |
| 7074 | |
| 7075 | symaddr = tsec->output_section->vma + tsec->output_offset + toff; |
| 7076 | reladdr = isec->output_section->vma + isec->output_offset + roff; |
| 7077 | if (symaddr - reladdr + max_branch_offset |
| 7078 | < 2 * max_branch_offset) |
| 7079 | continue; |
| 7080 | } |
| 7081 | |
| 7082 | /* Look for an existing fixup to this address. */ |
| 7083 | for (f = fixups; f ; f = f->next) |
| 7084 | if (f->tsec == tsec && f->toff == toff) |
| 7085 | break; |
| 7086 | |
| 7087 | if (f == NULL) |
| 7088 | { |
| 7089 | size_t size; |
| 7090 | unsigned long stub_rtype; |
| 7091 | |
| 7092 | val = trampoff - roff; |
| 7093 | if (val >= max_branch_offset) |
| 7094 | /* Oh dear, we can't reach a trampoline. Don't try to add |
| 7095 | one. We'll report an error later. */ |
| 7096 | continue; |
| 7097 | |
| 7098 | if (link_info->shared) |
| 7099 | { |
| 7100 | size = 4 * ARRAY_SIZE (shared_stub_entry); |
| 7101 | insn_offset = 12; |
| 7102 | } |
| 7103 | else |
| 7104 | { |
| 7105 | size = 4 * ARRAY_SIZE (stub_entry); |
| 7106 | insn_offset = 0; |
| 7107 | } |
| 7108 | stub_rtype = R_PPC_RELAX; |
| 7109 | if (tsec == htab->plt |
| 7110 | || tsec == htab->glink) |
| 7111 | { |
| 7112 | stub_rtype = R_PPC_RELAX_PLT; |
| 7113 | if (r_type == R_PPC_PLTREL24) |
| 7114 | stub_rtype = R_PPC_RELAX_PLTREL24; |
| 7115 | } |
| 7116 | |
| 7117 | /* Hijack the old relocation. Since we need two |
| 7118 | relocations for this use a "composite" reloc. */ |
| 7119 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 7120 | stub_rtype); |
| 7121 | irel->r_offset = trampoff + insn_offset; |
| 7122 | if (r_type == R_PPC_PLTREL24 |
| 7123 | && stub_rtype != R_PPC_RELAX_PLTREL24) |
| 7124 | irel->r_addend = 0; |
| 7125 | |
| 7126 | /* Record the fixup so we don't do it again this section. */ |
| 7127 | f = bfd_malloc (sizeof (*f)); |
| 7128 | f->next = fixups; |
| 7129 | f->tsec = tsec; |
| 7130 | f->toff = toff; |
| 7131 | f->trampoff = trampoff; |
| 7132 | fixups = f; |
| 7133 | |
| 7134 | trampoff += size; |
| 7135 | changes++; |
| 7136 | } |
| 7137 | else |
| 7138 | { |
| 7139 | val = f->trampoff - roff; |
| 7140 | if (val >= max_branch_offset) |
| 7141 | continue; |
| 7142 | |
| 7143 | /* Nop out the reloc, since we're finalizing things here. */ |
| 7144 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 7145 | } |
| 7146 | |
| 7147 | /* Get the section contents. */ |
| 7148 | if (contents == NULL) |
| 7149 | { |
| 7150 | /* Get cached copy if it exists. */ |
| 7151 | if (elf_section_data (isec)->this_hdr.contents != NULL) |
| 7152 | contents = elf_section_data (isec)->this_hdr.contents; |
| 7153 | /* Go get them off disk. */ |
| 7154 | else if (!bfd_malloc_and_get_section (abfd, isec, &contents)) |
| 7155 | goto error_return; |
| 7156 | } |
| 7157 | |
| 7158 | /* Fix up the existing branch to hit the trampoline. */ |
| 7159 | hit_addr = contents + roff; |
| 7160 | switch (r_type) |
| 7161 | { |
| 7162 | case R_PPC_REL24: |
| 7163 | case R_PPC_LOCAL24PC: |
| 7164 | case R_PPC_PLTREL24: |
| 7165 | t0 = bfd_get_32 (abfd, hit_addr); |
| 7166 | t0 &= ~0x3fffffc; |
| 7167 | t0 |= val & 0x3fffffc; |
| 7168 | bfd_put_32 (abfd, t0, hit_addr); |
| 7169 | break; |
| 7170 | |
| 7171 | case R_PPC_REL14: |
| 7172 | case R_PPC_REL14_BRTAKEN: |
| 7173 | case R_PPC_REL14_BRNTAKEN: |
| 7174 | t0 = bfd_get_32 (abfd, hit_addr); |
| 7175 | t0 &= ~0xfffc; |
| 7176 | t0 |= val & 0xfffc; |
| 7177 | bfd_put_32 (abfd, t0, hit_addr); |
| 7178 | break; |
| 7179 | } |
| 7180 | } |
| 7181 | |
| 7182 | while (fixups != NULL) |
| 7183 | { |
| 7184 | struct one_fixup *f = fixups; |
| 7185 | fixups = fixups->next; |
| 7186 | free (f); |
| 7187 | } |
| 7188 | } |
| 7189 | |
| 7190 | workaround_change = FALSE; |
| 7191 | newsize = trampoff; |
| 7192 | if (htab->params->ppc476_workaround |
| 7193 | && (!link_info->relocatable |
| 7194 | || isec->output_section->alignment_power >= htab->params->pagesize_p2)) |
| 7195 | { |
| 7196 | bfd_vma addr, end_addr; |
| 7197 | unsigned int crossings; |
| 7198 | bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; |
| 7199 | |
| 7200 | addr = isec->output_section->vma + isec->output_offset; |
| 7201 | end_addr = addr + trampoff; |
| 7202 | addr &= -pagesize; |
| 7203 | crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2; |
| 7204 | if (crossings != 0) |
| 7205 | { |
| 7206 | /* Keep space aligned, to ensure the patch code itself does |
| 7207 | not cross a page. Don't decrease size calculated on a |
| 7208 | previous pass as otherwise we might never settle on a layout. */ |
| 7209 | newsize = 15 - ((end_addr - 1) & 15); |
| 7210 | newsize += crossings * 16; |
| 7211 | if (relax_info->workaround_size < newsize) |
| 7212 | { |
| 7213 | relax_info->workaround_size = newsize; |
| 7214 | workaround_change = TRUE; |
| 7215 | } |
| 7216 | /* Ensure relocate_section is called. */ |
| 7217 | isec->flags |= SEC_RELOC; |
| 7218 | } |
| 7219 | newsize = trampoff + relax_info->workaround_size; |
| 7220 | } |
| 7221 | |
| 7222 | if (changes || workaround_change) |
| 7223 | isec->size = newsize; |
| 7224 | |
| 7225 | if (isymbuf != NULL |
| 7226 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 7227 | { |
| 7228 | if (! link_info->keep_memory) |
| 7229 | free (isymbuf); |
| 7230 | else |
| 7231 | { |
| 7232 | /* Cache the symbols for elf_link_input_bfd. */ |
| 7233 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 7234 | } |
| 7235 | } |
| 7236 | |
| 7237 | if (contents != NULL |
| 7238 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 7239 | { |
| 7240 | if (!changes && !link_info->keep_memory) |
| 7241 | free (contents); |
| 7242 | else |
| 7243 | { |
| 7244 | /* Cache the section contents for elf_link_input_bfd. */ |
| 7245 | elf_section_data (isec)->this_hdr.contents = contents; |
| 7246 | } |
| 7247 | } |
| 7248 | |
| 7249 | if (changes != 0) |
| 7250 | { |
| 7251 | /* Append sufficient NOP relocs so we can write out relocation |
| 7252 | information for the trampolines. */ |
| 7253 | Elf_Internal_Shdr *rel_hdr; |
| 7254 | Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) |
| 7255 | * sizeof (*new_relocs)); |
| 7256 | unsigned ix; |
| 7257 | |
| 7258 | if (!new_relocs) |
| 7259 | goto error_return; |
| 7260 | memcpy (new_relocs, internal_relocs, |
| 7261 | isec->reloc_count * sizeof (*new_relocs)); |
| 7262 | for (ix = changes; ix--;) |
| 7263 | { |
| 7264 | irel = new_relocs + ix + isec->reloc_count; |
| 7265 | |
| 7266 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 7267 | } |
| 7268 | if (internal_relocs != elf_section_data (isec)->relocs) |
| 7269 | free (internal_relocs); |
| 7270 | elf_section_data (isec)->relocs = new_relocs; |
| 7271 | isec->reloc_count += changes; |
| 7272 | rel_hdr = _bfd_elf_single_rel_hdr (isec); |
| 7273 | rel_hdr->sh_size += changes * rel_hdr->sh_entsize; |
| 7274 | } |
| 7275 | else if (internal_relocs != NULL |
| 7276 | && elf_section_data (isec)->relocs != internal_relocs) |
| 7277 | free (internal_relocs); |
| 7278 | |
| 7279 | *again = changes != 0 || workaround_change; |
| 7280 | return TRUE; |
| 7281 | |
| 7282 | error_return: |
| 7283 | while (fixups != NULL) |
| 7284 | { |
| 7285 | struct one_fixup *f = fixups; |
| 7286 | fixups = fixups->next; |
| 7287 | free (f); |
| 7288 | } |
| 7289 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
| 7290 | free (isymbuf); |
| 7291 | if (contents != NULL |
| 7292 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 7293 | free (contents); |
| 7294 | if (internal_relocs != NULL |
| 7295 | && elf_section_data (isec)->relocs != internal_relocs) |
| 7296 | free (internal_relocs); |
| 7297 | return FALSE; |
| 7298 | } |
| 7299 | \f |
| 7300 | /* What to do when ld finds relocations against symbols defined in |
| 7301 | discarded sections. */ |
| 7302 | |
| 7303 | static unsigned int |
| 7304 | ppc_elf_action_discarded (asection *sec) |
| 7305 | { |
| 7306 | if (strcmp (".fixup", sec->name) == 0) |
| 7307 | return 0; |
| 7308 | |
| 7309 | if (strcmp (".got2", sec->name) == 0) |
| 7310 | return 0; |
| 7311 | |
| 7312 | return _bfd_elf_default_action_discarded (sec); |
| 7313 | } |
| 7314 | \f |
| 7315 | /* Fill in the address for a pointer generated in a linker section. */ |
| 7316 | |
| 7317 | static bfd_vma |
| 7318 | elf_finish_pointer_linker_section (bfd *input_bfd, |
| 7319 | elf_linker_section_t *lsect, |
| 7320 | struct elf_link_hash_entry *h, |
| 7321 | bfd_vma relocation, |
| 7322 | const Elf_Internal_Rela *rel) |
| 7323 | { |
| 7324 | elf_linker_section_pointers_t *linker_section_ptr; |
| 7325 | |
| 7326 | BFD_ASSERT (lsect != NULL); |
| 7327 | |
| 7328 | if (h != NULL) |
| 7329 | { |
| 7330 | /* Handle global symbol. */ |
| 7331 | struct ppc_elf_link_hash_entry *eh; |
| 7332 | |
| 7333 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 7334 | BFD_ASSERT (eh->elf.def_regular); |
| 7335 | linker_section_ptr = eh->linker_section_pointer; |
| 7336 | } |
| 7337 | else |
| 7338 | { |
| 7339 | /* Handle local symbol. */ |
| 7340 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 7341 | |
| 7342 | BFD_ASSERT (is_ppc_elf (input_bfd)); |
| 7343 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); |
| 7344 | linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; |
| 7345 | } |
| 7346 | |
| 7347 | linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, |
| 7348 | rel->r_addend, |
| 7349 | lsect); |
| 7350 | BFD_ASSERT (linker_section_ptr != NULL); |
| 7351 | |
| 7352 | /* Offset will always be a multiple of four, so use the bottom bit |
| 7353 | as a "written" flag. */ |
| 7354 | if ((linker_section_ptr->offset & 1) == 0) |
| 7355 | { |
| 7356 | bfd_put_32 (lsect->section->owner, |
| 7357 | relocation + linker_section_ptr->addend, |
| 7358 | lsect->section->contents + linker_section_ptr->offset); |
| 7359 | linker_section_ptr->offset += 1; |
| 7360 | } |
| 7361 | |
| 7362 | relocation = (lsect->section->output_section->vma |
| 7363 | + lsect->section->output_offset |
| 7364 | + linker_section_ptr->offset - 1 |
| 7365 | - SYM_VAL (lsect->sym)); |
| 7366 | |
| 7367 | #ifdef DEBUG |
| 7368 | fprintf (stderr, |
| 7369 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", |
| 7370 | lsect->name, (long) relocation, (long) relocation); |
| 7371 | #endif |
| 7372 | |
| 7373 | return relocation; |
| 7374 | } |
| 7375 | |
| 7376 | #define PPC_LO(v) ((v) & 0xffff) |
| 7377 | #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| 7378 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| 7379 | |
| 7380 | static void |
| 7381 | write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, |
| 7382 | struct bfd_link_info *info) |
| 7383 | { |
| 7384 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 7385 | bfd *output_bfd = info->output_bfd; |
| 7386 | bfd_vma plt; |
| 7387 | |
| 7388 | plt = ((ent->plt.offset & ~1) |
| 7389 | + plt_sec->output_section->vma |
| 7390 | + plt_sec->output_offset); |
| 7391 | |
| 7392 | if (info->shared) |
| 7393 | { |
| 7394 | bfd_vma got = 0; |
| 7395 | |
| 7396 | if (ent->addend >= 32768) |
| 7397 | got = (ent->addend |
| 7398 | + ent->sec->output_section->vma |
| 7399 | + ent->sec->output_offset); |
| 7400 | else if (htab->elf.hgot != NULL) |
| 7401 | got = SYM_VAL (htab->elf.hgot); |
| 7402 | |
| 7403 | plt -= got; |
| 7404 | |
| 7405 | if (plt + 0x8000 < 0x10000) |
| 7406 | { |
| 7407 | bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); |
| 7408 | p += 4; |
| 7409 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 7410 | p += 4; |
| 7411 | bfd_put_32 (output_bfd, BCTR, p); |
| 7412 | p += 4; |
| 7413 | bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p); |
| 7414 | p += 4; |
| 7415 | } |
| 7416 | else |
| 7417 | { |
| 7418 | bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); |
| 7419 | p += 4; |
| 7420 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); |
| 7421 | p += 4; |
| 7422 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 7423 | p += 4; |
| 7424 | bfd_put_32 (output_bfd, BCTR, p); |
| 7425 | p += 4; |
| 7426 | } |
| 7427 | } |
| 7428 | else |
| 7429 | { |
| 7430 | bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); |
| 7431 | p += 4; |
| 7432 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); |
| 7433 | p += 4; |
| 7434 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 7435 | p += 4; |
| 7436 | bfd_put_32 (output_bfd, BCTR, p); |
| 7437 | p += 4; |
| 7438 | } |
| 7439 | } |
| 7440 | |
| 7441 | /* Return true if symbol is defined statically. */ |
| 7442 | |
| 7443 | static bfd_boolean |
| 7444 | is_static_defined (struct elf_link_hash_entry *h) |
| 7445 | { |
| 7446 | return ((h->root.type == bfd_link_hash_defined |
| 7447 | || h->root.type == bfd_link_hash_defweak) |
| 7448 | && h->root.u.def.section != NULL |
| 7449 | && h->root.u.def.section->output_section != NULL); |
| 7450 | } |
| 7451 | |
| 7452 | /* If INSN is an opcode that may be used with an @tls operand, return |
| 7453 | the transformed insn for TLS optimisation, otherwise return 0. If |
| 7454 | REG is non-zero only match an insn with RB or RA equal to REG. */ |
| 7455 | |
| 7456 | unsigned int |
| 7457 | _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) |
| 7458 | { |
| 7459 | unsigned int rtra; |
| 7460 | |
| 7461 | if ((insn & (0x3f << 26)) != 31 << 26) |
| 7462 | return 0; |
| 7463 | |
| 7464 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) |
| 7465 | rtra = insn & ((1 << 26) - (1 << 16)); |
| 7466 | else if (((insn >> 16) & 0x1f) == reg) |
| 7467 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); |
| 7468 | else |
| 7469 | return 0; |
| 7470 | |
| 7471 | if ((insn & (0x3ff << 1)) == 266 << 1) |
| 7472 | /* add -> addi. */ |
| 7473 | insn = 14 << 26; |
| 7474 | else if ((insn & (0x1f << 1)) == 23 << 1 |
| 7475 | && ((insn & (0x1f << 6)) < 14 << 6 |
| 7476 | || ((insn & (0x1f << 6)) >= 16 << 6 |
| 7477 | && (insn & (0x1f << 6)) < 24 << 6))) |
| 7478 | /* load and store indexed -> dform. */ |
| 7479 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; |
| 7480 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) |
| 7481 | /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| 7482 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); |
| 7483 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) |
| 7484 | /* lwax -> lwa. */ |
| 7485 | insn = (58 << 26) | 2; |
| 7486 | else |
| 7487 | return 0; |
| 7488 | insn |= rtra; |
| 7489 | return insn; |
| 7490 | } |
| 7491 | |
| 7492 | /* If INSN is an opcode that may be used with an @tprel operand, return |
| 7493 | the transformed insn for an undefined weak symbol, ie. with the |
| 7494 | thread pointer REG operand removed. Otherwise return 0. */ |
| 7495 | |
| 7496 | unsigned int |
| 7497 | _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) |
| 7498 | { |
| 7499 | if ((insn & (0x1f << 16)) == reg << 16 |
| 7500 | && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ |
| 7501 | || (insn & (0x3f << 26)) == 15u << 26 /* addis */ |
| 7502 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ |
| 7503 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ |
| 7504 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ |
| 7505 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ |
| 7506 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ |
| 7507 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ |
| 7508 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ |
| 7509 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ |
| 7510 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ |
| 7511 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ |
| 7512 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ |
| 7513 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ |
| 7514 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ |
| 7515 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ |
| 7516 | && (insn & 3) != 1) |
| 7517 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ |
| 7518 | && ((insn & 3) == 0 || (insn & 3) == 3)))) |
| 7519 | { |
| 7520 | insn &= ~(0x1f << 16); |
| 7521 | } |
| 7522 | else if ((insn & (0x1f << 21)) == reg << 21 |
| 7523 | && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ |
| 7524 | || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ |
| 7525 | || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) |
| 7526 | { |
| 7527 | insn &= ~(0x1f << 21); |
| 7528 | insn |= (insn & (0x1f << 16)) << 5; |
| 7529 | if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) |
| 7530 | insn -= 2 >> 26; /* convert to ori,oris */ |
| 7531 | } |
| 7532 | else |
| 7533 | insn = 0; |
| 7534 | return insn; |
| 7535 | } |
| 7536 | |
| 7537 | static bfd_boolean |
| 7538 | is_insn_ds_form (unsigned int insn) |
| 7539 | { |
| 7540 | return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ |
| 7541 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ |
| 7542 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ |
| 7543 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); |
| 7544 | } |
| 7545 | |
| 7546 | static bfd_boolean |
| 7547 | is_insn_dq_form (unsigned int insn) |
| 7548 | { |
| 7549 | return (insn & (0x3f << 26)) == 56u << 26; /* lq */ |
| 7550 | } |
| 7551 | |
| 7552 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 7553 | to handle the relocations for a section. |
| 7554 | |
| 7555 | The relocs are always passed as Rela structures; if the section |
| 7556 | actually uses Rel structures, the r_addend field will always be |
| 7557 | zero. |
| 7558 | |
| 7559 | This function is responsible for adjust the section contents as |
| 7560 | necessary, and (if using Rela relocs and generating a |
| 7561 | relocatable output file) adjusting the reloc addend as |
| 7562 | necessary. |
| 7563 | |
| 7564 | This function does not have to worry about setting the reloc |
| 7565 | address or the reloc symbol index. |
| 7566 | |
| 7567 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 7568 | |
| 7569 | LOCAL_SECTIONS is an array giving the section in the input file |
| 7570 | corresponding to the st_shndx field of each local symbol. |
| 7571 | |
| 7572 | The global hash table entry for the global symbols can be found |
| 7573 | via elf_sym_hashes (input_bfd). |
| 7574 | |
| 7575 | When generating relocatable output, this function must handle |
| 7576 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 7577 | going to be the section symbol corresponding to the output |
| 7578 | section, which means that the addend must be adjusted |
| 7579 | accordingly. */ |
| 7580 | |
| 7581 | static bfd_boolean |
| 7582 | ppc_elf_relocate_section (bfd *output_bfd, |
| 7583 | struct bfd_link_info *info, |
| 7584 | bfd *input_bfd, |
| 7585 | asection *input_section, |
| 7586 | bfd_byte *contents, |
| 7587 | Elf_Internal_Rela *relocs, |
| 7588 | Elf_Internal_Sym *local_syms, |
| 7589 | asection **local_sections) |
| 7590 | { |
| 7591 | Elf_Internal_Shdr *symtab_hdr; |
| 7592 | struct elf_link_hash_entry **sym_hashes; |
| 7593 | struct ppc_elf_link_hash_table *htab; |
| 7594 | Elf_Internal_Rela *rel; |
| 7595 | Elf_Internal_Rela *relend; |
| 7596 | Elf_Internal_Rela outrel; |
| 7597 | asection *got2; |
| 7598 | bfd_vma *local_got_offsets; |
| 7599 | bfd_boolean ret = TRUE; |
| 7600 | bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); |
| 7601 | bfd_boolean is_vxworks_tls; |
| 7602 | |
| 7603 | #ifdef DEBUG |
| 7604 | _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " |
| 7605 | "%ld relocations%s", |
| 7606 | input_bfd, input_section, |
| 7607 | (long) input_section->reloc_count, |
| 7608 | (info->relocatable) ? " (relocatable)" : ""); |
| 7609 | #endif |
| 7610 | |
| 7611 | got2 = bfd_get_section_by_name (input_bfd, ".got2"); |
| 7612 | |
| 7613 | /* Initialize howto table if not already done. */ |
| 7614 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 7615 | ppc_elf_howto_init (); |
| 7616 | |
| 7617 | htab = ppc_elf_hash_table (info); |
| 7618 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 7619 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 7620 | sym_hashes = elf_sym_hashes (input_bfd); |
| 7621 | /* We have to handle relocations in vxworks .tls_vars sections |
| 7622 | specially, because the dynamic loader is 'weird'. */ |
| 7623 | is_vxworks_tls = (htab->is_vxworks && info->shared |
| 7624 | && !strcmp (input_section->output_section->name, |
| 7625 | ".tls_vars")); |
| 7626 | rel = relocs; |
| 7627 | relend = relocs + input_section->reloc_count; |
| 7628 | for (; rel < relend; rel++) |
| 7629 | { |
| 7630 | enum elf_ppc_reloc_type r_type; |
| 7631 | bfd_vma addend; |
| 7632 | bfd_reloc_status_type r; |
| 7633 | Elf_Internal_Sym *sym; |
| 7634 | asection *sec; |
| 7635 | struct elf_link_hash_entry *h; |
| 7636 | const char *sym_name; |
| 7637 | reloc_howto_type *howto; |
| 7638 | unsigned long r_symndx; |
| 7639 | bfd_vma relocation; |
| 7640 | bfd_vma branch_bit, from; |
| 7641 | bfd_boolean unresolved_reloc; |
| 7642 | bfd_boolean warned; |
| 7643 | unsigned int tls_type, tls_mask, tls_gd; |
| 7644 | struct plt_entry **ifunc; |
| 7645 | struct reloc_howto_struct alt_howto; |
| 7646 | |
| 7647 | r_type = ELF32_R_TYPE (rel->r_info); |
| 7648 | sym = NULL; |
| 7649 | sec = NULL; |
| 7650 | h = NULL; |
| 7651 | unresolved_reloc = FALSE; |
| 7652 | warned = FALSE; |
| 7653 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 7654 | |
| 7655 | if (r_symndx < symtab_hdr->sh_info) |
| 7656 | { |
| 7657 | sym = local_syms + r_symndx; |
| 7658 | sec = local_sections[r_symndx]; |
| 7659 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 7660 | |
| 7661 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 7662 | } |
| 7663 | else |
| 7664 | { |
| 7665 | bfd_boolean ignored; |
| 7666 | |
| 7667 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 7668 | r_symndx, symtab_hdr, sym_hashes, |
| 7669 | h, sec, relocation, |
| 7670 | unresolved_reloc, warned, ignored); |
| 7671 | |
| 7672 | sym_name = h->root.root.string; |
| 7673 | } |
| 7674 | |
| 7675 | if (sec != NULL && discarded_section (sec)) |
| 7676 | { |
| 7677 | /* For relocs against symbols from removed linkonce sections, |
| 7678 | or sections discarded by a linker script, we just want the |
| 7679 | section contents zeroed. Avoid any special processing. */ |
| 7680 | howto = NULL; |
| 7681 | if (r_type < R_PPC_max) |
| 7682 | howto = ppc_elf_howto_table[r_type]; |
| 7683 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 7684 | rel, 1, relend, howto, 0, contents); |
| 7685 | } |
| 7686 | |
| 7687 | if (info->relocatable) |
| 7688 | { |
| 7689 | if (got2 != NULL |
| 7690 | && r_type == R_PPC_PLTREL24 |
| 7691 | && rel->r_addend != 0) |
| 7692 | { |
| 7693 | /* R_PPC_PLTREL24 is rather special. If non-zero, the |
| 7694 | addend specifies the GOT pointer offset within .got2. */ |
| 7695 | rel->r_addend += got2->output_offset; |
| 7696 | } |
| 7697 | if (r_type != R_PPC_RELAX_PLT |
| 7698 | && r_type != R_PPC_RELAX_PLTREL24 |
| 7699 | && r_type != R_PPC_RELAX) |
| 7700 | continue; |
| 7701 | } |
| 7702 | |
| 7703 | /* TLS optimizations. Replace instruction sequences and relocs |
| 7704 | based on information we collected in tls_optimize. We edit |
| 7705 | RELOCS so that --emit-relocs will output something sensible |
| 7706 | for the final instruction stream. */ |
| 7707 | tls_mask = 0; |
| 7708 | tls_gd = 0; |
| 7709 | if (h != NULL) |
| 7710 | tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; |
| 7711 | else if (local_got_offsets != NULL) |
| 7712 | { |
| 7713 | struct plt_entry **local_plt; |
| 7714 | char *lgot_masks; |
| 7715 | local_plt |
| 7716 | = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); |
| 7717 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 7718 | tls_mask = lgot_masks[r_symndx]; |
| 7719 | } |
| 7720 | |
| 7721 | /* Ensure reloc mapping code below stays sane. */ |
| 7722 | if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) |
| 7723 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) |
| 7724 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) |
| 7725 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) |
| 7726 | || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) |
| 7727 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) |
| 7728 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) |
| 7729 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) |
| 7730 | abort (); |
| 7731 | switch (r_type) |
| 7732 | { |
| 7733 | default: |
| 7734 | break; |
| 7735 | |
| 7736 | case R_PPC_GOT_TPREL16: |
| 7737 | case R_PPC_GOT_TPREL16_LO: |
| 7738 | if ((tls_mask & TLS_TLS) != 0 |
| 7739 | && (tls_mask & TLS_TPREL) == 0) |
| 7740 | { |
| 7741 | bfd_vma insn; |
| 7742 | |
| 7743 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); |
| 7744 | insn &= 31 << 21; |
| 7745 | insn |= 0x3c020000; /* addis 0,2,0 */ |
| 7746 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); |
| 7747 | r_type = R_PPC_TPREL16_HA; |
| 7748 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7749 | } |
| 7750 | break; |
| 7751 | |
| 7752 | case R_PPC_TLS: |
| 7753 | if ((tls_mask & TLS_TLS) != 0 |
| 7754 | && (tls_mask & TLS_TPREL) == 0) |
| 7755 | { |
| 7756 | bfd_vma insn; |
| 7757 | |
| 7758 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7759 | insn = _bfd_elf_ppc_at_tls_transform (insn, 2); |
| 7760 | if (insn == 0) |
| 7761 | abort (); |
| 7762 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 7763 | r_type = R_PPC_TPREL16_LO; |
| 7764 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7765 | |
| 7766 | /* Was PPC_TLS which sits on insn boundary, now |
| 7767 | PPC_TPREL16_LO which is at low-order half-word. */ |
| 7768 | rel->r_offset += d_offset; |
| 7769 | } |
| 7770 | break; |
| 7771 | |
| 7772 | case R_PPC_GOT_TLSGD16_HI: |
| 7773 | case R_PPC_GOT_TLSGD16_HA: |
| 7774 | tls_gd = TLS_TPRELGD; |
| 7775 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7776 | goto tls_gdld_hi; |
| 7777 | break; |
| 7778 | |
| 7779 | case R_PPC_GOT_TLSLD16_HI: |
| 7780 | case R_PPC_GOT_TLSLD16_HA: |
| 7781 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7782 | { |
| 7783 | tls_gdld_hi: |
| 7784 | if ((tls_mask & tls_gd) != 0) |
| 7785 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 7786 | + R_PPC_GOT_TPREL16); |
| 7787 | else |
| 7788 | { |
| 7789 | rel->r_offset -= d_offset; |
| 7790 | bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| 7791 | r_type = R_PPC_NONE; |
| 7792 | } |
| 7793 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7794 | } |
| 7795 | break; |
| 7796 | |
| 7797 | case R_PPC_GOT_TLSGD16: |
| 7798 | case R_PPC_GOT_TLSGD16_LO: |
| 7799 | tls_gd = TLS_TPRELGD; |
| 7800 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7801 | goto tls_ldgd_opt; |
| 7802 | break; |
| 7803 | |
| 7804 | case R_PPC_GOT_TLSLD16: |
| 7805 | case R_PPC_GOT_TLSLD16_LO: |
| 7806 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7807 | { |
| 7808 | unsigned int insn1, insn2; |
| 7809 | bfd_vma offset; |
| 7810 | |
| 7811 | tls_ldgd_opt: |
| 7812 | offset = (bfd_vma) -1; |
| 7813 | /* If not using the newer R_PPC_TLSGD/LD to mark |
| 7814 | __tls_get_addr calls, we must trust that the call |
| 7815 | stays with its arg setup insns, ie. that the next |
| 7816 | reloc is the __tls_get_addr call associated with |
| 7817 | the current reloc. Edit both insns. */ |
| 7818 | if (input_section->has_tls_get_addr_call |
| 7819 | && rel + 1 < relend |
| 7820 | && branch_reloc_hash_match (input_bfd, rel + 1, |
| 7821 | htab->tls_get_addr)) |
| 7822 | offset = rel[1].r_offset; |
| 7823 | /* We read the low GOT_TLS insn because we need to keep |
| 7824 | the destination reg. It may be something other than |
| 7825 | the usual r3, and moved to r3 before the call by |
| 7826 | intervening code. */ |
| 7827 | insn1 = bfd_get_32 (output_bfd, |
| 7828 | contents + rel->r_offset - d_offset); |
| 7829 | if ((tls_mask & tls_gd) != 0) |
| 7830 | { |
| 7831 | /* IE */ |
| 7832 | insn1 &= (0x1f << 21) | (0x1f << 16); |
| 7833 | insn1 |= 32 << 26; /* lwz */ |
| 7834 | if (offset != (bfd_vma) -1) |
| 7835 | { |
| 7836 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7837 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 7838 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7839 | } |
| 7840 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 7841 | + R_PPC_GOT_TPREL16); |
| 7842 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7843 | } |
| 7844 | else |
| 7845 | { |
| 7846 | /* LE */ |
| 7847 | insn1 &= 0x1f << 21; |
| 7848 | insn1 |= 0x3c020000; /* addis r,2,0 */ |
| 7849 | if (tls_gd == 0) |
| 7850 | { |
| 7851 | /* Was an LD reloc. */ |
| 7852 | for (r_symndx = 0; |
| 7853 | r_symndx < symtab_hdr->sh_info; |
| 7854 | r_symndx++) |
| 7855 | if (local_sections[r_symndx] == sec) |
| 7856 | break; |
| 7857 | if (r_symndx >= symtab_hdr->sh_info) |
| 7858 | r_symndx = STN_UNDEF; |
| 7859 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7860 | if (r_symndx != STN_UNDEF) |
| 7861 | rel->r_addend -= (local_syms[r_symndx].st_value |
| 7862 | + sec->output_offset |
| 7863 | + sec->output_section->vma); |
| 7864 | } |
| 7865 | r_type = R_PPC_TPREL16_HA; |
| 7866 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7867 | if (offset != (bfd_vma) -1) |
| 7868 | { |
| 7869 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); |
| 7870 | rel[1].r_offset = offset + d_offset; |
| 7871 | rel[1].r_addend = rel->r_addend; |
| 7872 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7873 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7874 | } |
| 7875 | } |
| 7876 | bfd_put_32 (output_bfd, insn1, |
| 7877 | contents + rel->r_offset - d_offset); |
| 7878 | if (tls_gd == 0) |
| 7879 | { |
| 7880 | /* We changed the symbol on an LD reloc. Start over |
| 7881 | in order to get h, sym, sec etc. right. */ |
| 7882 | rel--; |
| 7883 | continue; |
| 7884 | } |
| 7885 | } |
| 7886 | break; |
| 7887 | |
| 7888 | case R_PPC_TLSGD: |
| 7889 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7890 | { |
| 7891 | unsigned int insn2; |
| 7892 | bfd_vma offset = rel->r_offset; |
| 7893 | |
| 7894 | if ((tls_mask & TLS_TPRELGD) != 0) |
| 7895 | { |
| 7896 | /* IE */ |
| 7897 | r_type = R_PPC_NONE; |
| 7898 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 7899 | } |
| 7900 | else |
| 7901 | { |
| 7902 | /* LE */ |
| 7903 | r_type = R_PPC_TPREL16_LO; |
| 7904 | rel->r_offset += d_offset; |
| 7905 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7906 | } |
| 7907 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7908 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7909 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 7910 | BFD_ASSERT (offset == rel[1].r_offset); |
| 7911 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7912 | } |
| 7913 | break; |
| 7914 | |
| 7915 | case R_PPC_TLSLD: |
| 7916 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7917 | { |
| 7918 | unsigned int insn2; |
| 7919 | |
| 7920 | for (r_symndx = 0; |
| 7921 | r_symndx < symtab_hdr->sh_info; |
| 7922 | r_symndx++) |
| 7923 | if (local_sections[r_symndx] == sec) |
| 7924 | break; |
| 7925 | if (r_symndx >= symtab_hdr->sh_info) |
| 7926 | r_symndx = STN_UNDEF; |
| 7927 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7928 | if (r_symndx != STN_UNDEF) |
| 7929 | rel->r_addend -= (local_syms[r_symndx].st_value |
| 7930 | + sec->output_offset |
| 7931 | + sec->output_section->vma); |
| 7932 | |
| 7933 | rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); |
| 7934 | rel->r_offset += d_offset; |
| 7935 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7936 | bfd_put_32 (output_bfd, insn2, |
| 7937 | contents + rel->r_offset - d_offset); |
| 7938 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 7939 | BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); |
| 7940 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7941 | rel--; |
| 7942 | continue; |
| 7943 | } |
| 7944 | break; |
| 7945 | } |
| 7946 | |
| 7947 | /* Handle other relocations that tweak non-addend part of insn. */ |
| 7948 | branch_bit = 0; |
| 7949 | switch (r_type) |
| 7950 | { |
| 7951 | default: |
| 7952 | break; |
| 7953 | |
| 7954 | /* Branch taken prediction relocations. */ |
| 7955 | case R_PPC_ADDR14_BRTAKEN: |
| 7956 | case R_PPC_REL14_BRTAKEN: |
| 7957 | branch_bit = BRANCH_PREDICT_BIT; |
| 7958 | /* Fall thru */ |
| 7959 | |
| 7960 | /* Branch not taken prediction relocations. */ |
| 7961 | case R_PPC_ADDR14_BRNTAKEN: |
| 7962 | case R_PPC_REL14_BRNTAKEN: |
| 7963 | { |
| 7964 | bfd_vma insn; |
| 7965 | |
| 7966 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7967 | insn &= ~BRANCH_PREDICT_BIT; |
| 7968 | insn |= branch_bit; |
| 7969 | |
| 7970 | from = (rel->r_offset |
| 7971 | + input_section->output_offset |
| 7972 | + input_section->output_section->vma); |
| 7973 | |
| 7974 | /* Invert 'y' bit if not the default. */ |
| 7975 | if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) |
| 7976 | insn ^= BRANCH_PREDICT_BIT; |
| 7977 | |
| 7978 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 7979 | break; |
| 7980 | } |
| 7981 | } |
| 7982 | |
| 7983 | ifunc = NULL; |
| 7984 | if (!htab->is_vxworks) |
| 7985 | { |
| 7986 | struct plt_entry *ent; |
| 7987 | |
| 7988 | if (h != NULL) |
| 7989 | { |
| 7990 | if (h->type == STT_GNU_IFUNC) |
| 7991 | ifunc = &h->plt.plist; |
| 7992 | } |
| 7993 | else if (local_got_offsets != NULL |
| 7994 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 7995 | { |
| 7996 | struct plt_entry **local_plt; |
| 7997 | |
| 7998 | local_plt = (struct plt_entry **) (local_got_offsets |
| 7999 | + symtab_hdr->sh_info); |
| 8000 | ifunc = local_plt + r_symndx; |
| 8001 | } |
| 8002 | |
| 8003 | ent = NULL; |
| 8004 | if (ifunc != NULL |
| 8005 | && (!info->shared |
| 8006 | || is_branch_reloc (r_type))) |
| 8007 | { |
| 8008 | addend = 0; |
| 8009 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 8010 | addend = rel->r_addend; |
| 8011 | ent = find_plt_ent (ifunc, got2, addend); |
| 8012 | } |
| 8013 | if (ent != NULL) |
| 8014 | { |
| 8015 | if (h == NULL && (ent->plt.offset & 1) == 0) |
| 8016 | { |
| 8017 | Elf_Internal_Rela rela; |
| 8018 | bfd_byte *loc; |
| 8019 | |
| 8020 | rela.r_offset = (htab->iplt->output_section->vma |
| 8021 | + htab->iplt->output_offset |
| 8022 | + ent->plt.offset); |
| 8023 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 8024 | rela.r_addend = relocation; |
| 8025 | loc = htab->reliplt->contents; |
| 8026 | loc += (htab->reliplt->reloc_count++ |
| 8027 | * sizeof (Elf32_External_Rela)); |
| 8028 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8029 | |
| 8030 | ent->plt.offset |= 1; |
| 8031 | } |
| 8032 | if (h == NULL && (ent->glink_offset & 1) == 0) |
| 8033 | { |
| 8034 | unsigned char *p = ((unsigned char *) htab->glink->contents |
| 8035 | + ent->glink_offset); |
| 8036 | write_glink_stub (ent, htab->iplt, p, info); |
| 8037 | ent->glink_offset |= 1; |
| 8038 | } |
| 8039 | |
| 8040 | unresolved_reloc = FALSE; |
| 8041 | if (htab->plt_type == PLT_NEW |
| 8042 | || !htab->elf.dynamic_sections_created |
| 8043 | || h == NULL |
| 8044 | || h->dynindx == -1) |
| 8045 | relocation = (htab->glink->output_section->vma |
| 8046 | + htab->glink->output_offset |
| 8047 | + (ent->glink_offset & ~1)); |
| 8048 | else |
| 8049 | relocation = (htab->plt->output_section->vma |
| 8050 | + htab->plt->output_offset |
| 8051 | + ent->plt.offset); |
| 8052 | } |
| 8053 | } |
| 8054 | |
| 8055 | addend = rel->r_addend; |
| 8056 | tls_type = 0; |
| 8057 | howto = NULL; |
| 8058 | if (r_type < R_PPC_max) |
| 8059 | howto = ppc_elf_howto_table[r_type]; |
| 8060 | switch (r_type) |
| 8061 | { |
| 8062 | default: |
| 8063 | info->callbacks->einfo |
| 8064 | (_("%P: %B: unknown relocation type %d for symbol %s\n"), |
| 8065 | input_bfd, (int) r_type, sym_name); |
| 8066 | |
| 8067 | bfd_set_error (bfd_error_bad_value); |
| 8068 | ret = FALSE; |
| 8069 | continue; |
| 8070 | |
| 8071 | case R_PPC_NONE: |
| 8072 | case R_PPC_TLS: |
| 8073 | case R_PPC_TLSGD: |
| 8074 | case R_PPC_TLSLD: |
| 8075 | case R_PPC_EMB_MRKREF: |
| 8076 | case R_PPC_GNU_VTINHERIT: |
| 8077 | case R_PPC_GNU_VTENTRY: |
| 8078 | continue; |
| 8079 | |
| 8080 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 8081 | address in the GOT as relocation value instead of the |
| 8082 | symbol's value itself. Also, create a GOT entry for the |
| 8083 | symbol and put the symbol value there. */ |
| 8084 | case R_PPC_GOT_TLSGD16: |
| 8085 | case R_PPC_GOT_TLSGD16_LO: |
| 8086 | case R_PPC_GOT_TLSGD16_HI: |
| 8087 | case R_PPC_GOT_TLSGD16_HA: |
| 8088 | tls_type = TLS_TLS | TLS_GD; |
| 8089 | goto dogot; |
| 8090 | |
| 8091 | case R_PPC_GOT_TLSLD16: |
| 8092 | case R_PPC_GOT_TLSLD16_LO: |
| 8093 | case R_PPC_GOT_TLSLD16_HI: |
| 8094 | case R_PPC_GOT_TLSLD16_HA: |
| 8095 | tls_type = TLS_TLS | TLS_LD; |
| 8096 | goto dogot; |
| 8097 | |
| 8098 | case R_PPC_GOT_TPREL16: |
| 8099 | case R_PPC_GOT_TPREL16_LO: |
| 8100 | case R_PPC_GOT_TPREL16_HI: |
| 8101 | case R_PPC_GOT_TPREL16_HA: |
| 8102 | tls_type = TLS_TLS | TLS_TPREL; |
| 8103 | goto dogot; |
| 8104 | |
| 8105 | case R_PPC_GOT_DTPREL16: |
| 8106 | case R_PPC_GOT_DTPREL16_LO: |
| 8107 | case R_PPC_GOT_DTPREL16_HI: |
| 8108 | case R_PPC_GOT_DTPREL16_HA: |
| 8109 | tls_type = TLS_TLS | TLS_DTPREL; |
| 8110 | goto dogot; |
| 8111 | |
| 8112 | case R_PPC_GOT16: |
| 8113 | case R_PPC_GOT16_LO: |
| 8114 | case R_PPC_GOT16_HI: |
| 8115 | case R_PPC_GOT16_HA: |
| 8116 | tls_mask = 0; |
| 8117 | dogot: |
| 8118 | { |
| 8119 | /* Relocation is to the entry for this symbol in the global |
| 8120 | offset table. */ |
| 8121 | bfd_vma off; |
| 8122 | bfd_vma *offp; |
| 8123 | unsigned long indx; |
| 8124 | |
| 8125 | if (htab->got == NULL) |
| 8126 | abort (); |
| 8127 | |
| 8128 | indx = 0; |
| 8129 | if (tls_type == (TLS_TLS | TLS_LD) |
| 8130 | && (h == NULL |
| 8131 | || !h->def_dynamic)) |
| 8132 | offp = &htab->tlsld_got.offset; |
| 8133 | else if (h != NULL) |
| 8134 | { |
| 8135 | bfd_boolean dyn; |
| 8136 | dyn = htab->elf.dynamic_sections_created; |
| 8137 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 8138 | || (info->shared |
| 8139 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
| 8140 | /* This is actually a static link, or it is a |
| 8141 | -Bsymbolic link and the symbol is defined |
| 8142 | locally, or the symbol was forced to be local |
| 8143 | because of a version file. */ |
| 8144 | ; |
| 8145 | else |
| 8146 | { |
| 8147 | BFD_ASSERT (h->dynindx != -1); |
| 8148 | indx = h->dynindx; |
| 8149 | unresolved_reloc = FALSE; |
| 8150 | } |
| 8151 | offp = &h->got.offset; |
| 8152 | } |
| 8153 | else |
| 8154 | { |
| 8155 | if (local_got_offsets == NULL) |
| 8156 | abort (); |
| 8157 | offp = &local_got_offsets[r_symndx]; |
| 8158 | } |
| 8159 | |
| 8160 | /* The offset must always be a multiple of 4. We use the |
| 8161 | least significant bit to record whether we have already |
| 8162 | processed this entry. */ |
| 8163 | off = *offp; |
| 8164 | if ((off & 1) != 0) |
| 8165 | off &= ~1; |
| 8166 | else |
| 8167 | { |
| 8168 | unsigned int tls_m = (tls_mask |
| 8169 | & (TLS_LD | TLS_GD | TLS_DTPREL |
| 8170 | | TLS_TPREL | TLS_TPRELGD)); |
| 8171 | |
| 8172 | if (offp == &htab->tlsld_got.offset) |
| 8173 | tls_m = TLS_LD; |
| 8174 | else if (h == NULL |
| 8175 | || !h->def_dynamic) |
| 8176 | tls_m &= ~TLS_LD; |
| 8177 | |
| 8178 | /* We might have multiple got entries for this sym. |
| 8179 | Initialize them all. */ |
| 8180 | do |
| 8181 | { |
| 8182 | int tls_ty = 0; |
| 8183 | |
| 8184 | if ((tls_m & TLS_LD) != 0) |
| 8185 | { |
| 8186 | tls_ty = TLS_TLS | TLS_LD; |
| 8187 | tls_m &= ~TLS_LD; |
| 8188 | } |
| 8189 | else if ((tls_m & TLS_GD) != 0) |
| 8190 | { |
| 8191 | tls_ty = TLS_TLS | TLS_GD; |
| 8192 | tls_m &= ~TLS_GD; |
| 8193 | } |
| 8194 | else if ((tls_m & TLS_DTPREL) != 0) |
| 8195 | { |
| 8196 | tls_ty = TLS_TLS | TLS_DTPREL; |
| 8197 | tls_m &= ~TLS_DTPREL; |
| 8198 | } |
| 8199 | else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 8200 | { |
| 8201 | tls_ty = TLS_TLS | TLS_TPREL; |
| 8202 | tls_m = 0; |
| 8203 | } |
| 8204 | |
| 8205 | /* Generate relocs for the dynamic linker. */ |
| 8206 | if ((info->shared || indx != 0) |
| 8207 | && (offp == &htab->tlsld_got.offset |
| 8208 | || h == NULL |
| 8209 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 8210 | || h->root.type != bfd_link_hash_undefweak)) |
| 8211 | { |
| 8212 | asection *rsec = htab->relgot; |
| 8213 | bfd_byte * loc; |
| 8214 | |
| 8215 | if (ifunc != NULL) |
| 8216 | rsec = htab->reliplt; |
| 8217 | outrel.r_offset = (htab->got->output_section->vma |
| 8218 | + htab->got->output_offset |
| 8219 | + off); |
| 8220 | outrel.r_addend = 0; |
| 8221 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 8222 | { |
| 8223 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); |
| 8224 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 8225 | { |
| 8226 | loc = rsec->contents; |
| 8227 | loc += (rsec->reloc_count++ |
| 8228 | * sizeof (Elf32_External_Rela)); |
| 8229 | bfd_elf32_swap_reloca_out (output_bfd, |
| 8230 | &outrel, loc); |
| 8231 | outrel.r_offset += 4; |
| 8232 | outrel.r_info |
| 8233 | = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 8234 | } |
| 8235 | } |
| 8236 | else if (tls_ty == (TLS_TLS | TLS_DTPREL)) |
| 8237 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 8238 | else if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 8239 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); |
| 8240 | else if (indx != 0) |
| 8241 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); |
| 8242 | else if (ifunc != NULL) |
| 8243 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 8244 | else |
| 8245 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 8246 | if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) |
| 8247 | { |
| 8248 | outrel.r_addend += relocation; |
| 8249 | if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| 8250 | { |
| 8251 | if (htab->elf.tls_sec == NULL) |
| 8252 | outrel.r_addend = 0; |
| 8253 | else |
| 8254 | outrel.r_addend -= htab->elf.tls_sec->vma; |
| 8255 | } |
| 8256 | } |
| 8257 | loc = rsec->contents; |
| 8258 | loc += (rsec->reloc_count++ |
| 8259 | * sizeof (Elf32_External_Rela)); |
| 8260 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 8261 | } |
| 8262 | |
| 8263 | /* Init the .got section contents if we're not |
| 8264 | emitting a reloc. */ |
| 8265 | else |
| 8266 | { |
| 8267 | bfd_vma value = relocation; |
| 8268 | |
| 8269 | if (tls_ty == (TLS_TLS | TLS_LD)) |
| 8270 | value = 1; |
| 8271 | else if (tls_ty != 0) |
| 8272 | { |
| 8273 | if (htab->elf.tls_sec == NULL) |
| 8274 | value = 0; |
| 8275 | else |
| 8276 | { |
| 8277 | value -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 8278 | if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 8279 | value += DTP_OFFSET - TP_OFFSET; |
| 8280 | } |
| 8281 | |
| 8282 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 8283 | { |
| 8284 | bfd_put_32 (output_bfd, value, |
| 8285 | htab->got->contents + off + 4); |
| 8286 | value = 1; |
| 8287 | } |
| 8288 | } |
| 8289 | bfd_put_32 (output_bfd, value, |
| 8290 | htab->got->contents + off); |
| 8291 | } |
| 8292 | |
| 8293 | off += 4; |
| 8294 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 8295 | off += 4; |
| 8296 | } |
| 8297 | while (tls_m != 0); |
| 8298 | |
| 8299 | off = *offp; |
| 8300 | *offp = off | 1; |
| 8301 | } |
| 8302 | |
| 8303 | if (off >= (bfd_vma) -2) |
| 8304 | abort (); |
| 8305 | |
| 8306 | if ((tls_type & TLS_TLS) != 0) |
| 8307 | { |
| 8308 | if (tls_type != (TLS_TLS | TLS_LD)) |
| 8309 | { |
| 8310 | if ((tls_mask & TLS_LD) != 0 |
| 8311 | && !(h == NULL |
| 8312 | || !h->def_dynamic)) |
| 8313 | off += 8; |
| 8314 | if (tls_type != (TLS_TLS | TLS_GD)) |
| 8315 | { |
| 8316 | if ((tls_mask & TLS_GD) != 0) |
| 8317 | off += 8; |
| 8318 | if (tls_type != (TLS_TLS | TLS_DTPREL)) |
| 8319 | { |
| 8320 | if ((tls_mask & TLS_DTPREL) != 0) |
| 8321 | off += 4; |
| 8322 | } |
| 8323 | } |
| 8324 | } |
| 8325 | } |
| 8326 | |
| 8327 | relocation = (htab->got->output_section->vma |
| 8328 | + htab->got->output_offset |
| 8329 | + off |
| 8330 | - SYM_VAL (htab->elf.hgot)); |
| 8331 | |
| 8332 | /* Addends on got relocations don't make much sense. |
| 8333 | x+off@got is actually x@got+off, and since the got is |
| 8334 | generated by a hash table traversal, the value in the |
| 8335 | got at entry m+n bears little relation to the entry m. */ |
| 8336 | if (addend != 0) |
| 8337 | info->callbacks->einfo |
| 8338 | (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), |
| 8339 | input_bfd, input_section, rel->r_offset, |
| 8340 | howto->name, |
| 8341 | sym_name); |
| 8342 | } |
| 8343 | break; |
| 8344 | |
| 8345 | /* Relocations that need no special processing. */ |
| 8346 | case R_PPC_LOCAL24PC: |
| 8347 | /* It makes no sense to point a local relocation |
| 8348 | at a symbol not in this object. */ |
| 8349 | if (unresolved_reloc) |
| 8350 | { |
| 8351 | if (! (*info->callbacks->undefined_symbol) (info, |
| 8352 | h->root.root.string, |
| 8353 | input_bfd, |
| 8354 | input_section, |
| 8355 | rel->r_offset, |
| 8356 | TRUE)) |
| 8357 | return FALSE; |
| 8358 | continue; |
| 8359 | } |
| 8360 | break; |
| 8361 | |
| 8362 | case R_PPC_DTPREL16: |
| 8363 | case R_PPC_DTPREL16_LO: |
| 8364 | case R_PPC_DTPREL16_HI: |
| 8365 | case R_PPC_DTPREL16_HA: |
| 8366 | if (htab->elf.tls_sec != NULL) |
| 8367 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 8368 | break; |
| 8369 | |
| 8370 | /* Relocations that may need to be propagated if this is a shared |
| 8371 | object. */ |
| 8372 | case R_PPC_TPREL16: |
| 8373 | case R_PPC_TPREL16_LO: |
| 8374 | case R_PPC_TPREL16_HI: |
| 8375 | case R_PPC_TPREL16_HA: |
| 8376 | if (h != NULL |
| 8377 | && h->root.type == bfd_link_hash_undefweak |
| 8378 | && h->dynindx == -1) |
| 8379 | { |
| 8380 | /* Make this relocation against an undefined weak symbol |
| 8381 | resolve to zero. This is really just a tweak, since |
| 8382 | code using weak externs ought to check that they are |
| 8383 | defined before using them. */ |
| 8384 | bfd_byte *p = contents + rel->r_offset - d_offset; |
| 8385 | unsigned int insn = bfd_get_32 (output_bfd, p); |
| 8386 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); |
| 8387 | if (insn != 0) |
| 8388 | bfd_put_32 (output_bfd, insn, p); |
| 8389 | break; |
| 8390 | } |
| 8391 | if (htab->elf.tls_sec != NULL) |
| 8392 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 8393 | /* The TPREL16 relocs shouldn't really be used in shared |
| 8394 | libs as they will result in DT_TEXTREL being set, but |
| 8395 | support them anyway. */ |
| 8396 | goto dodyn; |
| 8397 | |
| 8398 | case R_PPC_TPREL32: |
| 8399 | if (htab->elf.tls_sec != NULL) |
| 8400 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 8401 | goto dodyn; |
| 8402 | |
| 8403 | case R_PPC_DTPREL32: |
| 8404 | if (htab->elf.tls_sec != NULL) |
| 8405 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 8406 | goto dodyn; |
| 8407 | |
| 8408 | case R_PPC_DTPMOD32: |
| 8409 | relocation = 1; |
| 8410 | addend = 0; |
| 8411 | goto dodyn; |
| 8412 | |
| 8413 | case R_PPC_REL16: |
| 8414 | case R_PPC_REL16_LO: |
| 8415 | case R_PPC_REL16_HI: |
| 8416 | case R_PPC_REL16_HA: |
| 8417 | break; |
| 8418 | |
| 8419 | case R_PPC_REL32: |
| 8420 | if (h == NULL || h == htab->elf.hgot) |
| 8421 | break; |
| 8422 | /* fall through */ |
| 8423 | |
| 8424 | case R_PPC_ADDR32: |
| 8425 | case R_PPC_ADDR16: |
| 8426 | case R_PPC_ADDR16_LO: |
| 8427 | case R_PPC_ADDR16_HI: |
| 8428 | case R_PPC_ADDR16_HA: |
| 8429 | case R_PPC_UADDR32: |
| 8430 | case R_PPC_UADDR16: |
| 8431 | goto dodyn; |
| 8432 | |
| 8433 | case R_PPC_VLE_REL8: |
| 8434 | case R_PPC_VLE_REL15: |
| 8435 | case R_PPC_VLE_REL24: |
| 8436 | case R_PPC_REL24: |
| 8437 | case R_PPC_REL14: |
| 8438 | case R_PPC_REL14_BRTAKEN: |
| 8439 | case R_PPC_REL14_BRNTAKEN: |
| 8440 | /* If these relocations are not to a named symbol, they can be |
| 8441 | handled right here, no need to bother the dynamic linker. */ |
| 8442 | if (SYMBOL_CALLS_LOCAL (info, h) |
| 8443 | || h == htab->elf.hgot) |
| 8444 | break; |
| 8445 | /* fall through */ |
| 8446 | |
| 8447 | case R_PPC_ADDR24: |
| 8448 | case R_PPC_ADDR14: |
| 8449 | case R_PPC_ADDR14_BRTAKEN: |
| 8450 | case R_PPC_ADDR14_BRNTAKEN: |
| 8451 | if (h != NULL && !info->shared) |
| 8452 | break; |
| 8453 | /* fall through */ |
| 8454 | |
| 8455 | dodyn: |
| 8456 | if ((input_section->flags & SEC_ALLOC) == 0 |
| 8457 | || is_vxworks_tls) |
| 8458 | break; |
| 8459 | |
| 8460 | if ((info->shared |
| 8461 | && !(h != NULL |
| 8462 | && ((h->root.type == bfd_link_hash_undefined |
| 8463 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN |
| 8464 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) |
| 8465 | || (h->root.type == bfd_link_hash_undefweak |
| 8466 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) |
| 8467 | && (must_be_dyn_reloc (info, r_type) |
| 8468 | || !SYMBOL_CALLS_LOCAL (info, h))) |
| 8469 | || (ELIMINATE_COPY_RELOCS |
| 8470 | && !info->shared |
| 8471 | && h != NULL |
| 8472 | && h->dynindx != -1 |
| 8473 | && !h->non_got_ref |
| 8474 | && !h->def_regular)) |
| 8475 | { |
| 8476 | int skip; |
| 8477 | bfd_byte *loc; |
| 8478 | asection *sreloc; |
| 8479 | #ifdef DEBUG |
| 8480 | fprintf (stderr, "ppc_elf_relocate_section needs to " |
| 8481 | "create relocation for %s\n", |
| 8482 | (h && h->root.root.string |
| 8483 | ? h->root.root.string : "<unknown>")); |
| 8484 | #endif |
| 8485 | |
| 8486 | /* When generating a shared object, these relocations |
| 8487 | are copied into the output file to be resolved at run |
| 8488 | time. */ |
| 8489 | sreloc = elf_section_data (input_section)->sreloc; |
| 8490 | if (ifunc) |
| 8491 | sreloc = htab->reliplt; |
| 8492 | if (sreloc == NULL) |
| 8493 | return FALSE; |
| 8494 | |
| 8495 | skip = 0; |
| 8496 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, |
| 8497 | input_section, |
| 8498 | rel->r_offset); |
| 8499 | if (outrel.r_offset == (bfd_vma) -1 |
| 8500 | || outrel.r_offset == (bfd_vma) -2) |
| 8501 | skip = (int) outrel.r_offset; |
| 8502 | outrel.r_offset += (input_section->output_section->vma |
| 8503 | + input_section->output_offset); |
| 8504 | |
| 8505 | if (skip) |
| 8506 | memset (&outrel, 0, sizeof outrel); |
| 8507 | else if ((h != NULL |
| 8508 | && (h->root.type == bfd_link_hash_undefined |
| 8509 | || h->root.type == bfd_link_hash_undefweak)) |
| 8510 | || !SYMBOL_REFERENCES_LOCAL (info, h)) |
| 8511 | { |
| 8512 | BFD_ASSERT (h->dynindx != -1); |
| 8513 | unresolved_reloc = FALSE; |
| 8514 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 8515 | outrel.r_addend = rel->r_addend; |
| 8516 | } |
| 8517 | else |
| 8518 | { |
| 8519 | outrel.r_addend = relocation + rel->r_addend; |
| 8520 | |
| 8521 | if (r_type != R_PPC_ADDR32) |
| 8522 | { |
| 8523 | long indx = 0; |
| 8524 | |
| 8525 | if (ifunc != NULL) |
| 8526 | { |
| 8527 | /* If we get here when building a static |
| 8528 | executable, then the libc startup function |
| 8529 | responsible for applying indirect function |
| 8530 | relocations is going to complain about |
| 8531 | the reloc type. |
| 8532 | If we get here when building a dynamic |
| 8533 | executable, it will be because we have |
| 8534 | a text relocation. The dynamic loader |
| 8535 | will set the text segment writable and |
| 8536 | non-executable to apply text relocations. |
| 8537 | So we'll segfault when trying to run the |
| 8538 | indirection function to resolve the reloc. */ |
| 8539 | info->callbacks->einfo |
| 8540 | (_("%P: %H: relocation %s for indirect " |
| 8541 | "function %s unsupported\n"), |
| 8542 | input_bfd, input_section, rel->r_offset, |
| 8543 | howto->name, |
| 8544 | sym_name); |
| 8545 | ret = FALSE; |
| 8546 | } |
| 8547 | else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
| 8548 | ; |
| 8549 | else if (sec == NULL || sec->owner == NULL) |
| 8550 | { |
| 8551 | bfd_set_error (bfd_error_bad_value); |
| 8552 | ret = FALSE; |
| 8553 | } |
| 8554 | else |
| 8555 | { |
| 8556 | asection *osec; |
| 8557 | |
| 8558 | /* We are turning this relocation into one |
| 8559 | against a section symbol. It would be |
| 8560 | proper to subtract the symbol's value, |
| 8561 | osec->vma, from the emitted reloc addend, |
| 8562 | but ld.so expects buggy relocs. |
| 8563 | FIXME: Why not always use a zero index? */ |
| 8564 | osec = sec->output_section; |
| 8565 | indx = elf_section_data (osec)->dynindx; |
| 8566 | if (indx == 0) |
| 8567 | { |
| 8568 | osec = htab->elf.text_index_section; |
| 8569 | indx = elf_section_data (osec)->dynindx; |
| 8570 | } |
| 8571 | BFD_ASSERT (indx != 0); |
| 8572 | #ifdef DEBUG |
| 8573 | if (indx == 0) |
| 8574 | printf ("indx=%ld section=%s flags=%08x name=%s\n", |
| 8575 | indx, osec->name, osec->flags, |
| 8576 | h->root.root.string); |
| 8577 | #endif |
| 8578 | } |
| 8579 | |
| 8580 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 8581 | } |
| 8582 | else if (ifunc != NULL) |
| 8583 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 8584 | else |
| 8585 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 8586 | } |
| 8587 | |
| 8588 | loc = sreloc->contents; |
| 8589 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 8590 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 8591 | |
| 8592 | if (skip == -1) |
| 8593 | continue; |
| 8594 | |
| 8595 | /* This reloc will be computed at runtime. We clear the memory |
| 8596 | so that it contains predictable value. */ |
| 8597 | if (! skip |
| 8598 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 8599 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) |
| 8600 | { |
| 8601 | relocation = howto->pc_relative ? outrel.r_offset : 0; |
| 8602 | addend = 0; |
| 8603 | break; |
| 8604 | } |
| 8605 | } |
| 8606 | break; |
| 8607 | |
| 8608 | case R_PPC_RELAX_PLT: |
| 8609 | case R_PPC_RELAX_PLTREL24: |
| 8610 | if (h != NULL) |
| 8611 | { |
| 8612 | struct plt_entry *ent; |
| 8613 | bfd_vma got2_addend = 0; |
| 8614 | |
| 8615 | if (r_type == R_PPC_RELAX_PLTREL24) |
| 8616 | { |
| 8617 | if (info->shared) |
| 8618 | got2_addend = addend; |
| 8619 | addend = 0; |
| 8620 | } |
| 8621 | ent = find_plt_ent (&h->plt.plist, got2, got2_addend); |
| 8622 | if (htab->plt_type == PLT_NEW) |
| 8623 | relocation = (htab->glink->output_section->vma |
| 8624 | + htab->glink->output_offset |
| 8625 | + ent->glink_offset); |
| 8626 | else |
| 8627 | relocation = (htab->plt->output_section->vma |
| 8628 | + htab->plt->output_offset |
| 8629 | + ent->plt.offset); |
| 8630 | } |
| 8631 | /* Fall thru */ |
| 8632 | |
| 8633 | case R_PPC_RELAX: |
| 8634 | { |
| 8635 | const int *stub; |
| 8636 | size_t size; |
| 8637 | size_t insn_offset = rel->r_offset; |
| 8638 | unsigned int insn; |
| 8639 | |
| 8640 | if (info->shared) |
| 8641 | { |
| 8642 | relocation -= (input_section->output_section->vma |
| 8643 | + input_section->output_offset |
| 8644 | + rel->r_offset - 4); |
| 8645 | stub = shared_stub_entry; |
| 8646 | bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12); |
| 8647 | bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8); |
| 8648 | bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4); |
| 8649 | stub += 3; |
| 8650 | size = ARRAY_SIZE (shared_stub_entry) - 3; |
| 8651 | } |
| 8652 | else |
| 8653 | { |
| 8654 | stub = stub_entry; |
| 8655 | size = ARRAY_SIZE (stub_entry); |
| 8656 | } |
| 8657 | |
| 8658 | relocation += addend; |
| 8659 | if (info->relocatable) |
| 8660 | relocation = 0; |
| 8661 | |
| 8662 | /* First insn is HA, second is LO. */ |
| 8663 | insn = *stub++; |
| 8664 | insn |= ((relocation + 0x8000) >> 16) & 0xffff; |
| 8665 | bfd_put_32 (output_bfd, insn, contents + insn_offset); |
| 8666 | insn_offset += 4; |
| 8667 | |
| 8668 | insn = *stub++; |
| 8669 | insn |= relocation & 0xffff; |
| 8670 | bfd_put_32 (output_bfd, insn, contents + insn_offset); |
| 8671 | insn_offset += 4; |
| 8672 | size -= 2; |
| 8673 | |
| 8674 | while (size != 0) |
| 8675 | { |
| 8676 | insn = *stub++; |
| 8677 | --size; |
| 8678 | bfd_put_32 (output_bfd, insn, contents + insn_offset); |
| 8679 | insn_offset += 4; |
| 8680 | } |
| 8681 | |
| 8682 | /* Rewrite the reloc and convert one of the trailing nop |
| 8683 | relocs to describe this relocation. */ |
| 8684 | BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); |
| 8685 | /* The relocs are at the bottom 2 bytes */ |
| 8686 | rel[0].r_offset += d_offset; |
| 8687 | memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); |
| 8688 | rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); |
| 8689 | rel[1].r_offset += 4; |
| 8690 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); |
| 8691 | rel++; |
| 8692 | } |
| 8693 | continue; |
| 8694 | |
| 8695 | /* Indirect .sdata relocation. */ |
| 8696 | case R_PPC_EMB_SDAI16: |
| 8697 | BFD_ASSERT (htab->sdata[0].section != NULL); |
| 8698 | if (!is_static_defined (htab->sdata[0].sym)) |
| 8699 | { |
| 8700 | unresolved_reloc = TRUE; |
| 8701 | break; |
| 8702 | } |
| 8703 | relocation |
| 8704 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], |
| 8705 | h, relocation, rel); |
| 8706 | addend = 0; |
| 8707 | break; |
| 8708 | |
| 8709 | /* Indirect .sdata2 relocation. */ |
| 8710 | case R_PPC_EMB_SDA2I16: |
| 8711 | BFD_ASSERT (htab->sdata[1].section != NULL); |
| 8712 | if (!is_static_defined (htab->sdata[1].sym)) |
| 8713 | { |
| 8714 | unresolved_reloc = TRUE; |
| 8715 | break; |
| 8716 | } |
| 8717 | relocation |
| 8718 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], |
| 8719 | h, relocation, rel); |
| 8720 | addend = 0; |
| 8721 | break; |
| 8722 | |
| 8723 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 8724 | section, not the actual VMA. This is appropriate when generating |
| 8725 | an embedded ELF object, for which the .got section acts like the |
| 8726 | AIX .toc section. */ |
| 8727 | case R_PPC_TOC16: /* phony GOT16 relocations */ |
| 8728 | if (sec == NULL || sec->output_section == NULL) |
| 8729 | { |
| 8730 | unresolved_reloc = TRUE; |
| 8731 | break; |
| 8732 | } |
| 8733 | BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), |
| 8734 | ".got") == 0 |
| 8735 | || strcmp (bfd_get_section_name (sec->owner, sec), |
| 8736 | ".cgot") == 0); |
| 8737 | |
| 8738 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 8739 | break; |
| 8740 | |
| 8741 | case R_PPC_PLTREL24: |
| 8742 | if (h != NULL && ifunc == NULL) |
| 8743 | { |
| 8744 | struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, |
| 8745 | info->shared ? addend : 0); |
| 8746 | if (ent == NULL |
| 8747 | || htab->plt == NULL) |
| 8748 | { |
| 8749 | /* We didn't make a PLT entry for this symbol. This |
| 8750 | happens when statically linking PIC code, or when |
| 8751 | using -Bsymbolic. */ |
| 8752 | } |
| 8753 | else |
| 8754 | { |
| 8755 | /* Relocation is to the entry for this symbol in the |
| 8756 | procedure linkage table. */ |
| 8757 | unresolved_reloc = FALSE; |
| 8758 | if (htab->plt_type == PLT_NEW) |
| 8759 | relocation = (htab->glink->output_section->vma |
| 8760 | + htab->glink->output_offset |
| 8761 | + ent->glink_offset); |
| 8762 | else |
| 8763 | relocation = (htab->plt->output_section->vma |
| 8764 | + htab->plt->output_offset |
| 8765 | + ent->plt.offset); |
| 8766 | } |
| 8767 | } |
| 8768 | |
| 8769 | /* R_PPC_PLTREL24 is rather special. If non-zero, the |
| 8770 | addend specifies the GOT pointer offset within .got2. |
| 8771 | Don't apply it to the relocation field. */ |
| 8772 | addend = 0; |
| 8773 | break; |
| 8774 | |
| 8775 | /* Relocate against _SDA_BASE_. */ |
| 8776 | case R_PPC_SDAREL16: |
| 8777 | { |
| 8778 | const char *name; |
| 8779 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 8780 | |
| 8781 | if (sec == NULL |
| 8782 | || sec->output_section == NULL |
| 8783 | || !is_static_defined (sda)) |
| 8784 | { |
| 8785 | unresolved_reloc = TRUE; |
| 8786 | break; |
| 8787 | } |
| 8788 | addend -= SYM_VAL (sda); |
| 8789 | |
| 8790 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8791 | if (!(strcmp (name, ".sdata") == 0 |
| 8792 | || strcmp (name, ".sbss") == 0)) |
| 8793 | { |
| 8794 | info->callbacks->einfo |
| 8795 | (_("%P: %B: the target (%s) of a %s relocation is " |
| 8796 | "in the wrong output section (%s)\n"), |
| 8797 | input_bfd, |
| 8798 | sym_name, |
| 8799 | howto->name, |
| 8800 | name); |
| 8801 | } |
| 8802 | } |
| 8803 | break; |
| 8804 | |
| 8805 | /* Relocate against _SDA2_BASE_. */ |
| 8806 | case R_PPC_EMB_SDA2REL: |
| 8807 | { |
| 8808 | const char *name; |
| 8809 | struct elf_link_hash_entry *sda = htab->sdata[1].sym; |
| 8810 | |
| 8811 | if (sec == NULL |
| 8812 | || sec->output_section == NULL |
| 8813 | || !is_static_defined (sda)) |
| 8814 | { |
| 8815 | unresolved_reloc = TRUE; |
| 8816 | break; |
| 8817 | } |
| 8818 | addend -= SYM_VAL (sda); |
| 8819 | |
| 8820 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8821 | if (!(strcmp (name, ".sdata2") == 0 |
| 8822 | || strcmp (name, ".sbss2") == 0)) |
| 8823 | { |
| 8824 | info->callbacks->einfo |
| 8825 | (_("%P: %B: the target (%s) of a %s relocation is " |
| 8826 | "in the wrong output section (%s)\n"), |
| 8827 | input_bfd, |
| 8828 | sym_name, |
| 8829 | howto->name, |
| 8830 | name); |
| 8831 | } |
| 8832 | } |
| 8833 | break; |
| 8834 | |
| 8835 | case R_PPC_VLE_LO16A: |
| 8836 | relocation = relocation + addend; |
| 8837 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 8838 | relocation, split16a_type); |
| 8839 | continue; |
| 8840 | |
| 8841 | case R_PPC_VLE_LO16D: |
| 8842 | relocation = relocation + addend; |
| 8843 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 8844 | relocation, split16d_type); |
| 8845 | continue; |
| 8846 | |
| 8847 | case R_PPC_VLE_HI16A: |
| 8848 | relocation = (relocation + addend) >> 16; |
| 8849 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 8850 | relocation, split16a_type); |
| 8851 | continue; |
| 8852 | |
| 8853 | case R_PPC_VLE_HI16D: |
| 8854 | relocation = (relocation + addend) >> 16; |
| 8855 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 8856 | relocation, split16d_type); |
| 8857 | continue; |
| 8858 | |
| 8859 | case R_PPC_VLE_HA16A: |
| 8860 | relocation = (relocation + addend + 0x8000) >> 16; |
| 8861 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 8862 | relocation, split16a_type); |
| 8863 | continue; |
| 8864 | |
| 8865 | case R_PPC_VLE_HA16D: |
| 8866 | relocation = (relocation + addend + 0x8000) >> 16; |
| 8867 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 8868 | relocation, split16d_type); |
| 8869 | continue; |
| 8870 | |
| 8871 | /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ |
| 8872 | case R_PPC_EMB_SDA21: |
| 8873 | case R_PPC_VLE_SDA21: |
| 8874 | case R_PPC_EMB_RELSDA: |
| 8875 | case R_PPC_VLE_SDA21_LO: |
| 8876 | { |
| 8877 | const char *name; |
| 8878 | int reg; |
| 8879 | unsigned int insn; |
| 8880 | struct elf_link_hash_entry *sda = NULL; |
| 8881 | |
| 8882 | if (sec == NULL || sec->output_section == NULL) |
| 8883 | { |
| 8884 | unresolved_reloc = TRUE; |
| 8885 | break; |
| 8886 | } |
| 8887 | |
| 8888 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8889 | if (strcmp (name, ".sdata") == 0 |
| 8890 | || strcmp (name, ".sbss") == 0) |
| 8891 | { |
| 8892 | reg = 13; |
| 8893 | sda = htab->sdata[0].sym; |
| 8894 | } |
| 8895 | else if (strcmp (name, ".sdata2") == 0 |
| 8896 | || strcmp (name, ".sbss2") == 0) |
| 8897 | { |
| 8898 | reg = 2; |
| 8899 | sda = htab->sdata[1].sym; |
| 8900 | } |
| 8901 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 |
| 8902 | || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 8903 | { |
| 8904 | reg = 0; |
| 8905 | } |
| 8906 | else |
| 8907 | { |
| 8908 | info->callbacks->einfo |
| 8909 | (_("%P: %B: the target (%s) of a %s relocation is " |
| 8910 | "in the wrong output section (%s)\n"), |
| 8911 | input_bfd, |
| 8912 | sym_name, |
| 8913 | howto->name, |
| 8914 | name); |
| 8915 | |
| 8916 | bfd_set_error (bfd_error_bad_value); |
| 8917 | ret = FALSE; |
| 8918 | continue; |
| 8919 | } |
| 8920 | |
| 8921 | if (sda != NULL) |
| 8922 | { |
| 8923 | if (!is_static_defined (sda)) |
| 8924 | { |
| 8925 | unresolved_reloc = TRUE; |
| 8926 | break; |
| 8927 | } |
| 8928 | addend -= SYM_VAL (sda); |
| 8929 | } |
| 8930 | |
| 8931 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 8932 | if (reg == 0 |
| 8933 | && (r_type == R_PPC_VLE_SDA21 |
| 8934 | || r_type == R_PPC_VLE_SDA21_LO)) |
| 8935 | { |
| 8936 | relocation = relocation + addend; |
| 8937 | addend = 0; |
| 8938 | |
| 8939 | /* Force e_li insn, keeping RT from original insn. */ |
| 8940 | insn &= 0x1f << 21; |
| 8941 | insn |= 28u << 26; |
| 8942 | |
| 8943 | /* We have an li20 field, bits 17..20, 11..15, 21..31. */ |
| 8944 | /* Top 4 bits of value to 17..20. */ |
| 8945 | insn |= (relocation & 0xf0000) >> 5; |
| 8946 | /* Next 5 bits of the value to 11..15. */ |
| 8947 | insn |= (relocation & 0xf800) << 5; |
| 8948 | /* And the final 11 bits of the value to bits 21 to 31. */ |
| 8949 | insn |= relocation & 0x7ff; |
| 8950 | |
| 8951 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 8952 | |
| 8953 | if (r_type == R_PPC_VLE_SDA21 |
| 8954 | && ((relocation + 0x80000) & 0xffffffff) > 0x100000) |
| 8955 | goto overflow; |
| 8956 | continue; |
| 8957 | } |
| 8958 | else if (r_type == R_PPC_EMB_SDA21 |
| 8959 | || r_type == R_PPC_VLE_SDA21 |
| 8960 | || r_type == R_PPC_VLE_SDA21_LO) |
| 8961 | { |
| 8962 | /* Fill in register field. */ |
| 8963 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 8964 | } |
| 8965 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 8966 | } |
| 8967 | break; |
| 8968 | |
| 8969 | case R_PPC_VLE_SDAREL_LO16A: |
| 8970 | case R_PPC_VLE_SDAREL_LO16D: |
| 8971 | case R_PPC_VLE_SDAREL_HI16A: |
| 8972 | case R_PPC_VLE_SDAREL_HI16D: |
| 8973 | case R_PPC_VLE_SDAREL_HA16A: |
| 8974 | case R_PPC_VLE_SDAREL_HA16D: |
| 8975 | { |
| 8976 | bfd_vma value; |
| 8977 | const char *name; |
| 8978 | //int reg; |
| 8979 | struct elf_link_hash_entry *sda = NULL; |
| 8980 | |
| 8981 | if (sec == NULL || sec->output_section == NULL) |
| 8982 | { |
| 8983 | unresolved_reloc = TRUE; |
| 8984 | break; |
| 8985 | } |
| 8986 | |
| 8987 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8988 | if (strcmp (name, ".sdata") == 0 |
| 8989 | || strcmp (name, ".sbss") == 0) |
| 8990 | { |
| 8991 | //reg = 13; |
| 8992 | sda = htab->sdata[0].sym; |
| 8993 | } |
| 8994 | else if (strcmp (name, ".sdata2") == 0 |
| 8995 | || strcmp (name, ".sbss2") == 0) |
| 8996 | { |
| 8997 | //reg = 2; |
| 8998 | sda = htab->sdata[1].sym; |
| 8999 | } |
| 9000 | else |
| 9001 | { |
| 9002 | (*_bfd_error_handler) |
| 9003 | (_("%B: the target (%s) of a %s relocation is " |
| 9004 | "in the wrong output section (%s)"), |
| 9005 | input_bfd, |
| 9006 | sym_name, |
| 9007 | howto->name, |
| 9008 | name); |
| 9009 | |
| 9010 | bfd_set_error (bfd_error_bad_value); |
| 9011 | ret = FALSE; |
| 9012 | continue; |
| 9013 | } |
| 9014 | |
| 9015 | if (sda != NULL) |
| 9016 | { |
| 9017 | if (!is_static_defined (sda)) |
| 9018 | { |
| 9019 | unresolved_reloc = TRUE; |
| 9020 | break; |
| 9021 | } |
| 9022 | } |
| 9023 | |
| 9024 | value = (sda->root.u.def.section->output_section->vma |
| 9025 | + sda->root.u.def.section->output_offset |
| 9026 | + addend); |
| 9027 | |
| 9028 | if (r_type == R_PPC_VLE_SDAREL_LO16A) |
| 9029 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 9030 | value, split16a_type); |
| 9031 | else if (r_type == R_PPC_VLE_SDAREL_LO16D) |
| 9032 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 9033 | value, split16d_type); |
| 9034 | else if (r_type == R_PPC_VLE_SDAREL_HI16A) |
| 9035 | { |
| 9036 | value = value >> 16; |
| 9037 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 9038 | value, split16a_type); |
| 9039 | } |
| 9040 | else if (r_type == R_PPC_VLE_SDAREL_HI16D) |
| 9041 | { |
| 9042 | value = value >> 16; |
| 9043 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 9044 | value, split16d_type); |
| 9045 | } |
| 9046 | else if (r_type == R_PPC_VLE_SDAREL_HA16A) |
| 9047 | { |
| 9048 | value = (value + 0x8000) >> 16; |
| 9049 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 9050 | value, split16a_type); |
| 9051 | } |
| 9052 | else if (r_type == R_PPC_VLE_SDAREL_HA16D) |
| 9053 | { |
| 9054 | value = (value + 0x8000) >> 16; |
| 9055 | ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, |
| 9056 | value, split16d_type); |
| 9057 | } |
| 9058 | } |
| 9059 | continue; |
| 9060 | |
| 9061 | /* Relocate against the beginning of the section. */ |
| 9062 | case R_PPC_SECTOFF: |
| 9063 | case R_PPC_SECTOFF_LO: |
| 9064 | case R_PPC_SECTOFF_HI: |
| 9065 | case R_PPC_SECTOFF_HA: |
| 9066 | if (sec == NULL || sec->output_section == NULL) |
| 9067 | { |
| 9068 | unresolved_reloc = TRUE; |
| 9069 | break; |
| 9070 | } |
| 9071 | addend -= sec->output_section->vma; |
| 9072 | break; |
| 9073 | |
| 9074 | /* Negative relocations. */ |
| 9075 | case R_PPC_EMB_NADDR32: |
| 9076 | case R_PPC_EMB_NADDR16: |
| 9077 | case R_PPC_EMB_NADDR16_LO: |
| 9078 | case R_PPC_EMB_NADDR16_HI: |
| 9079 | case R_PPC_EMB_NADDR16_HA: |
| 9080 | addend -= 2 * relocation; |
| 9081 | break; |
| 9082 | |
| 9083 | case R_PPC_COPY: |
| 9084 | case R_PPC_GLOB_DAT: |
| 9085 | case R_PPC_JMP_SLOT: |
| 9086 | case R_PPC_RELATIVE: |
| 9087 | case R_PPC_IRELATIVE: |
| 9088 | case R_PPC_PLT32: |
| 9089 | case R_PPC_PLTREL32: |
| 9090 | case R_PPC_PLT16_LO: |
| 9091 | case R_PPC_PLT16_HI: |
| 9092 | case R_PPC_PLT16_HA: |
| 9093 | case R_PPC_ADDR30: |
| 9094 | case R_PPC_EMB_RELSEC16: |
| 9095 | case R_PPC_EMB_RELST_LO: |
| 9096 | case R_PPC_EMB_RELST_HI: |
| 9097 | case R_PPC_EMB_RELST_HA: |
| 9098 | case R_PPC_EMB_BIT_FLD: |
| 9099 | info->callbacks->einfo |
| 9100 | (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), |
| 9101 | input_bfd, |
| 9102 | howto->name, |
| 9103 | sym_name); |
| 9104 | |
| 9105 | bfd_set_error (bfd_error_invalid_operation); |
| 9106 | ret = FALSE; |
| 9107 | continue; |
| 9108 | } |
| 9109 | |
| 9110 | /* Do any further special processing. */ |
| 9111 | switch (r_type) |
| 9112 | { |
| 9113 | default: |
| 9114 | break; |
| 9115 | |
| 9116 | case R_PPC_ADDR16_HA: |
| 9117 | case R_PPC_REL16_HA: |
| 9118 | case R_PPC_SECTOFF_HA: |
| 9119 | case R_PPC_TPREL16_HA: |
| 9120 | case R_PPC_DTPREL16_HA: |
| 9121 | case R_PPC_EMB_NADDR16_HA: |
| 9122 | case R_PPC_EMB_RELST_HA: |
| 9123 | /* It's just possible that this symbol is a weak symbol |
| 9124 | that's not actually defined anywhere. In that case, |
| 9125 | 'sec' would be NULL, and we should leave the symbol |
| 9126 | alone (it will be set to zero elsewhere in the link). */ |
| 9127 | if (sec == NULL) |
| 9128 | break; |
| 9129 | /* Fall thru */ |
| 9130 | |
| 9131 | case R_PPC_PLT16_HA: |
| 9132 | case R_PPC_GOT16_HA: |
| 9133 | case R_PPC_GOT_TLSGD16_HA: |
| 9134 | case R_PPC_GOT_TLSLD16_HA: |
| 9135 | case R_PPC_GOT_TPREL16_HA: |
| 9136 | case R_PPC_GOT_DTPREL16_HA: |
| 9137 | /* Add 0x10000 if sign bit in 0:15 is set. |
| 9138 | Bits 0:15 are not used. */ |
| 9139 | addend += 0x8000; |
| 9140 | break; |
| 9141 | |
| 9142 | case R_PPC_ADDR16: |
| 9143 | case R_PPC_ADDR16_LO: |
| 9144 | case R_PPC_GOT16: |
| 9145 | case R_PPC_GOT16_LO: |
| 9146 | case R_PPC_SDAREL16: |
| 9147 | case R_PPC_SECTOFF: |
| 9148 | case R_PPC_SECTOFF_LO: |
| 9149 | case R_PPC_DTPREL16: |
| 9150 | case R_PPC_DTPREL16_LO: |
| 9151 | case R_PPC_TPREL16: |
| 9152 | case R_PPC_TPREL16_LO: |
| 9153 | case R_PPC_GOT_TLSGD16: |
| 9154 | case R_PPC_GOT_TLSGD16_LO: |
| 9155 | case R_PPC_GOT_TLSLD16: |
| 9156 | case R_PPC_GOT_TLSLD16_LO: |
| 9157 | case R_PPC_GOT_DTPREL16: |
| 9158 | case R_PPC_GOT_DTPREL16_LO: |
| 9159 | case R_PPC_GOT_TPREL16: |
| 9160 | case R_PPC_GOT_TPREL16_LO: |
| 9161 | { |
| 9162 | /* The 32-bit ABI lacks proper relocations to deal with |
| 9163 | certain 64-bit instructions. Prevent damage to bits |
| 9164 | that make up part of the insn opcode. */ |
| 9165 | unsigned int insn, mask, lobit; |
| 9166 | |
| 9167 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); |
| 9168 | mask = 0; |
| 9169 | if (is_insn_ds_form (insn)) |
| 9170 | mask = 3; |
| 9171 | else if (is_insn_dq_form (insn)) |
| 9172 | mask = 15; |
| 9173 | else |
| 9174 | break; |
| 9175 | lobit = mask & (relocation + addend); |
| 9176 | if (lobit != 0) |
| 9177 | { |
| 9178 | addend -= lobit; |
| 9179 | info->callbacks->einfo |
| 9180 | (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), |
| 9181 | input_bfd, input_section, rel->r_offset, |
| 9182 | howto->name, sym_name, mask + 1); |
| 9183 | bfd_set_error (bfd_error_bad_value); |
| 9184 | ret = FALSE; |
| 9185 | } |
| 9186 | addend += insn & mask; |
| 9187 | } |
| 9188 | break; |
| 9189 | } |
| 9190 | |
| 9191 | #ifdef DEBUG |
| 9192 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " |
| 9193 | "offset = %ld, addend = %ld\n", |
| 9194 | howto->name, |
| 9195 | (int) r_type, |
| 9196 | sym_name, |
| 9197 | r_symndx, |
| 9198 | (long) rel->r_offset, |
| 9199 | (long) addend); |
| 9200 | #endif |
| 9201 | |
| 9202 | if (unresolved_reloc |
| 9203 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 9204 | && h->def_dynamic) |
| 9205 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 9206 | rel->r_offset) != (bfd_vma) -1) |
| 9207 | { |
| 9208 | info->callbacks->einfo |
| 9209 | (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), |
| 9210 | input_bfd, input_section, rel->r_offset, |
| 9211 | howto->name, |
| 9212 | sym_name); |
| 9213 | ret = FALSE; |
| 9214 | } |
| 9215 | |
| 9216 | /* 16-bit fields in insns mostly have signed values, but a |
| 9217 | few insns have 16-bit unsigned values. Really, we should |
| 9218 | have different reloc types. */ |
| 9219 | if (howto->complain_on_overflow != complain_overflow_dont |
| 9220 | && howto->dst_mask == 0xffff |
| 9221 | && (input_section->flags & SEC_CODE) != 0) |
| 9222 | { |
| 9223 | enum complain_overflow complain = complain_overflow_signed; |
| 9224 | |
| 9225 | if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0) |
| 9226 | { |
| 9227 | unsigned int insn; |
| 9228 | |
| 9229 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| 9230 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
| 9231 | complain = complain_overflow_bitfield; |
| 9232 | else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ |
| 9233 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ |
| 9234 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) |
| 9235 | complain = complain_overflow_unsigned; |
| 9236 | } |
| 9237 | if (howto->complain_on_overflow != complain) |
| 9238 | { |
| 9239 | alt_howto = *howto; |
| 9240 | alt_howto.complain_on_overflow = complain; |
| 9241 | howto = &alt_howto; |
| 9242 | } |
| 9243 | } |
| 9244 | |
| 9245 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, |
| 9246 | rel->r_offset, relocation, addend); |
| 9247 | |
| 9248 | if (r != bfd_reloc_ok) |
| 9249 | { |
| 9250 | if (r == bfd_reloc_overflow) |
| 9251 | { |
| 9252 | overflow: |
| 9253 | if (warned) |
| 9254 | continue; |
| 9255 | if (h != NULL |
| 9256 | && h->root.type == bfd_link_hash_undefweak |
| 9257 | && howto->pc_relative) |
| 9258 | { |
| 9259 | /* Assume this is a call protected by other code that |
| 9260 | detect the symbol is undefined. If this is the case, |
| 9261 | we can safely ignore the overflow. If not, the |
| 9262 | program is hosed anyway, and a little warning isn't |
| 9263 | going to help. */ |
| 9264 | |
| 9265 | continue; |
| 9266 | } |
| 9267 | |
| 9268 | if (! (*info->callbacks->reloc_overflow) (info, |
| 9269 | (h ? &h->root : NULL), |
| 9270 | sym_name, |
| 9271 | howto->name, |
| 9272 | rel->r_addend, |
| 9273 | input_bfd, |
| 9274 | input_section, |
| 9275 | rel->r_offset)) |
| 9276 | return FALSE; |
| 9277 | } |
| 9278 | else |
| 9279 | { |
| 9280 | info->callbacks->einfo |
| 9281 | (_("%P: %H: %s reloc against `%s': error %d\n"), |
| 9282 | input_bfd, input_section, rel->r_offset, |
| 9283 | howto->name, sym_name, (int) r); |
| 9284 | ret = FALSE; |
| 9285 | } |
| 9286 | } |
| 9287 | } |
| 9288 | |
| 9289 | #ifdef DEBUG |
| 9290 | fprintf (stderr, "\n"); |
| 9291 | #endif |
| 9292 | |
| 9293 | if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET |
| 9294 | && input_section->size != input_section->rawsize |
| 9295 | && (strcmp (input_section->output_section->name, ".init") == 0 |
| 9296 | || strcmp (input_section->output_section->name, ".fini") == 0)) |
| 9297 | { |
| 9298 | /* Branch around the trampolines. */ |
| 9299 | unsigned int insn = B + input_section->size - input_section->rawsize; |
| 9300 | bfd_put_32 (input_bfd, insn, contents + input_section->rawsize); |
| 9301 | } |
| 9302 | |
| 9303 | if (htab->params->ppc476_workaround |
| 9304 | && input_section->sec_info_type == SEC_INFO_TYPE_TARGET |
| 9305 | && (!info->relocatable |
| 9306 | || (input_section->output_section->alignment_power |
| 9307 | >= htab->params->pagesize_p2))) |
| 9308 | { |
| 9309 | struct ppc_elf_relax_info *relax_info; |
| 9310 | bfd_vma start_addr, end_addr, addr; |
| 9311 | bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; |
| 9312 | |
| 9313 | relax_info = elf_section_data (input_section)->sec_info; |
| 9314 | if (relax_info->workaround_size != 0) |
| 9315 | { |
| 9316 | bfd_byte *p; |
| 9317 | unsigned int n; |
| 9318 | bfd_byte fill[4]; |
| 9319 | |
| 9320 | bfd_put_32 (input_bfd, BA, fill); |
| 9321 | p = contents + input_section->size - relax_info->workaround_size; |
| 9322 | n = relax_info->workaround_size >> 2; |
| 9323 | while (n--) |
| 9324 | { |
| 9325 | memcpy (p, fill, 4); |
| 9326 | p += 4; |
| 9327 | } |
| 9328 | } |
| 9329 | |
| 9330 | /* The idea is: Replace the last instruction on a page with a |
| 9331 | branch to a patch area. Put the insn there followed by a |
| 9332 | branch back to the next page. Complicated a little by |
| 9333 | needing to handle moved conditional branches, and by not |
| 9334 | wanting to touch data-in-text. */ |
| 9335 | |
| 9336 | start_addr = (input_section->output_section->vma |
| 9337 | + input_section->output_offset); |
| 9338 | end_addr = (start_addr + input_section->size |
| 9339 | - relax_info->workaround_size); |
| 9340 | for (addr = ((start_addr & -pagesize) + pagesize - 4); |
| 9341 | addr < end_addr; |
| 9342 | addr += pagesize) |
| 9343 | { |
| 9344 | bfd_vma offset = addr - start_addr; |
| 9345 | Elf_Internal_Rela *lo, *hi; |
| 9346 | bfd_boolean is_data; |
| 9347 | bfd_vma patch_off, patch_addr; |
| 9348 | unsigned int insn; |
| 9349 | |
| 9350 | /* Do we have a data reloc at this offset? If so, leave |
| 9351 | the word alone. */ |
| 9352 | is_data = FALSE; |
| 9353 | lo = relocs; |
| 9354 | hi = relend; |
| 9355 | rel = NULL; |
| 9356 | while (lo < hi) |
| 9357 | { |
| 9358 | rel = lo + (hi - lo) / 2; |
| 9359 | if (rel->r_offset < offset) |
| 9360 | lo = rel + 1; |
| 9361 | else if (rel->r_offset > offset + 3) |
| 9362 | hi = rel; |
| 9363 | else |
| 9364 | { |
| 9365 | switch (ELF32_R_TYPE (rel->r_info)) |
| 9366 | { |
| 9367 | case R_PPC_ADDR32: |
| 9368 | case R_PPC_UADDR32: |
| 9369 | case R_PPC_REL32: |
| 9370 | case R_PPC_ADDR30: |
| 9371 | is_data = TRUE; |
| 9372 | break; |
| 9373 | default: |
| 9374 | break; |
| 9375 | } |
| 9376 | break; |
| 9377 | } |
| 9378 | } |
| 9379 | if (is_data) |
| 9380 | continue; |
| 9381 | |
| 9382 | /* Some instructions can be left alone too. Unconditional |
| 9383 | branches, except for bcctr with BO=0x14 (bctr, bctrl), |
| 9384 | avoid the icache failure. |
| 9385 | |
| 9386 | The problem occurs due to prefetch across a page boundary |
| 9387 | where stale instructions can be fetched from the next |
| 9388 | page, and the mechanism for flushing these bad |
| 9389 | instructions fails under certain circumstances. The |
| 9390 | unconditional branches: |
| 9391 | 1) Branch: b, bl, ba, bla, |
| 9392 | 2) Branch Conditional: bc, bca, bcl, bcla, |
| 9393 | 3) Branch Conditional to Link Register: bclr, bclrl, |
| 9394 | where (2) and (3) have BO=0x14 making them unconditional, |
| 9395 | prevent the bad prefetch because the prefetch itself is |
| 9396 | affected by these instructions. This happens even if the |
| 9397 | instruction is not executed. |
| 9398 | |
| 9399 | A bctr example: |
| 9400 | . |
| 9401 | . lis 9,new_page@ha |
| 9402 | . addi 9,9,new_page@l |
| 9403 | . mtctr 9 |
| 9404 | . bctr |
| 9405 | . nop |
| 9406 | . nop |
| 9407 | . new_page: |
| 9408 | . |
| 9409 | The bctr is not predicted taken due to ctr not being |
| 9410 | ready, so prefetch continues on past the bctr into the |
| 9411 | new page which might have stale instructions. If they |
| 9412 | fail to be flushed, then they will be executed after the |
| 9413 | bctr executes. Either of the following modifications |
| 9414 | prevent the bad prefetch from happening in the first |
| 9415 | place: |
| 9416 | . |
| 9417 | . lis 9,new_page@ha lis 9,new_page@ha |
| 9418 | . addi 9,9,new_page@l addi 9,9,new_page@l |
| 9419 | . mtctr 9 mtctr 9 |
| 9420 | . bctr bctr |
| 9421 | . nop b somewhere_else |
| 9422 | . b somewhere_else nop |
| 9423 | . new_page: new_page: |
| 9424 | . */ |
| 9425 | insn = bfd_get_32 (input_bfd, contents + offset); |
| 9426 | if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */ |
| 9427 | || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/ |
| 9428 | && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */ |
| 9429 | || ((insn & (0x3f << 26)) == (19u << 26) |
| 9430 | && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */ |
| 9431 | && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */ |
| 9432 | continue; |
| 9433 | |
| 9434 | patch_addr = (start_addr + input_section->size |
| 9435 | - relax_info->workaround_size); |
| 9436 | patch_addr = (patch_addr + 15) & -16; |
| 9437 | patch_off = patch_addr - start_addr; |
| 9438 | bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset); |
| 9439 | |
| 9440 | if (rel != NULL |
| 9441 | && rel->r_offset >= offset |
| 9442 | && rel->r_offset < offset + 4) |
| 9443 | { |
| 9444 | /* If the insn we are patching had a reloc, adjust the |
| 9445 | reloc r_offset so that the reloc applies to the moved |
| 9446 | location. This matters for -r and --emit-relocs. */ |
| 9447 | if (rel + 1 != relend) |
| 9448 | { |
| 9449 | Elf_Internal_Rela tmp = *rel; |
| 9450 | |
| 9451 | /* Keep the relocs sorted by r_offset. */ |
| 9452 | memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel)); |
| 9453 | relend[-1] = tmp; |
| 9454 | } |
| 9455 | relend[-1].r_offset += patch_off - offset; |
| 9456 | } |
| 9457 | else |
| 9458 | rel = NULL; |
| 9459 | |
| 9460 | if ((insn & (0x3f << 26)) == (16u << 26) /* bc */ |
| 9461 | && (insn & 2) == 0 /* relative */) |
| 9462 | { |
| 9463 | bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000; |
| 9464 | |
| 9465 | delta += offset - patch_off; |
| 9466 | if (info->relocatable && rel != NULL) |
| 9467 | delta = 0; |
| 9468 | if (!info->relocatable && rel != NULL) |
| 9469 | { |
| 9470 | enum elf_ppc_reloc_type r_type; |
| 9471 | |
| 9472 | r_type = ELF32_R_TYPE (relend[-1].r_info); |
| 9473 | if (r_type == R_PPC_REL14_BRTAKEN) |
| 9474 | insn |= BRANCH_PREDICT_BIT; |
| 9475 | else if (r_type == R_PPC_REL14_BRNTAKEN) |
| 9476 | insn &= ~BRANCH_PREDICT_BIT; |
| 9477 | else |
| 9478 | BFD_ASSERT (r_type == R_PPC_REL14); |
| 9479 | |
| 9480 | if ((r_type == R_PPC_REL14_BRTAKEN |
| 9481 | || r_type == R_PPC_REL14_BRNTAKEN) |
| 9482 | && delta + 0x8000 < 0x10000 |
| 9483 | && (bfd_signed_vma) delta < 0) |
| 9484 | insn ^= BRANCH_PREDICT_BIT; |
| 9485 | } |
| 9486 | if (delta + 0x8000 < 0x10000) |
| 9487 | { |
| 9488 | bfd_put_32 (input_bfd, |
| 9489 | (insn & ~0xfffc) | (delta & 0xfffc), |
| 9490 | contents + patch_off); |
| 9491 | patch_off += 4; |
| 9492 | bfd_put_32 (input_bfd, |
| 9493 | B | ((offset + 4 - patch_off) & 0x3fffffc), |
| 9494 | contents + patch_off); |
| 9495 | patch_off += 4; |
| 9496 | } |
| 9497 | else |
| 9498 | { |
| 9499 | if (rel != NULL) |
| 9500 | { |
| 9501 | unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info); |
| 9502 | |
| 9503 | relend[-1].r_offset += 8; |
| 9504 | relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24); |
| 9505 | } |
| 9506 | bfd_put_32 (input_bfd, |
| 9507 | (insn & ~0xfffc) | 8, |
| 9508 | contents + patch_off); |
| 9509 | patch_off += 4; |
| 9510 | bfd_put_32 (input_bfd, |
| 9511 | B | ((offset + 4 - patch_off) & 0x3fffffc), |
| 9512 | contents + patch_off); |
| 9513 | patch_off += 4; |
| 9514 | bfd_put_32 (input_bfd, |
| 9515 | B | ((delta - 8) & 0x3fffffc), |
| 9516 | contents + patch_off); |
| 9517 | patch_off += 4; |
| 9518 | } |
| 9519 | } |
| 9520 | else |
| 9521 | { |
| 9522 | bfd_put_32 (input_bfd, insn, contents + patch_off); |
| 9523 | patch_off += 4; |
| 9524 | bfd_put_32 (input_bfd, |
| 9525 | B | ((offset + 4 - patch_off) & 0x3fffffc), |
| 9526 | contents + patch_off); |
| 9527 | patch_off += 4; |
| 9528 | } |
| 9529 | BFD_ASSERT (patch_off <= input_section->size); |
| 9530 | relax_info->workaround_size = input_section->size - patch_off; |
| 9531 | } |
| 9532 | } |
| 9533 | |
| 9534 | return ret; |
| 9535 | } |
| 9536 | \f |
| 9537 | /* Finish up dynamic symbol handling. We set the contents of various |
| 9538 | dynamic sections here. */ |
| 9539 | |
| 9540 | static bfd_boolean |
| 9541 | ppc_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 9542 | struct bfd_link_info *info, |
| 9543 | struct elf_link_hash_entry *h, |
| 9544 | Elf_Internal_Sym *sym) |
| 9545 | { |
| 9546 | struct ppc_elf_link_hash_table *htab; |
| 9547 | struct plt_entry *ent; |
| 9548 | bfd_boolean doneone; |
| 9549 | |
| 9550 | #ifdef DEBUG |
| 9551 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| 9552 | h->root.root.string); |
| 9553 | #endif |
| 9554 | |
| 9555 | htab = ppc_elf_hash_table (info); |
| 9556 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 9557 | |
| 9558 | doneone = FALSE; |
| 9559 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 9560 | if (ent->plt.offset != (bfd_vma) -1) |
| 9561 | { |
| 9562 | if (!doneone) |
| 9563 | { |
| 9564 | Elf_Internal_Rela rela; |
| 9565 | bfd_byte *loc; |
| 9566 | bfd_vma reloc_index; |
| 9567 | |
| 9568 | if (htab->plt_type == PLT_NEW |
| 9569 | || !htab->elf.dynamic_sections_created |
| 9570 | || h->dynindx == -1) |
| 9571 | reloc_index = ent->plt.offset / 4; |
| 9572 | else |
| 9573 | { |
| 9574 | reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) |
| 9575 | / htab->plt_slot_size); |
| 9576 | if (reloc_index > PLT_NUM_SINGLE_ENTRIES |
| 9577 | && htab->plt_type == PLT_OLD) |
| 9578 | reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
| 9579 | } |
| 9580 | |
| 9581 | /* This symbol has an entry in the procedure linkage table. |
| 9582 | Set it up. */ |
| 9583 | if (htab->plt_type == PLT_VXWORKS |
| 9584 | && htab->elf.dynamic_sections_created |
| 9585 | && h->dynindx != -1) |
| 9586 | { |
| 9587 | bfd_vma got_offset; |
| 9588 | const bfd_vma *plt_entry; |
| 9589 | |
| 9590 | /* The first three entries in .got.plt are reserved. */ |
| 9591 | got_offset = (reloc_index + 3) * 4; |
| 9592 | |
| 9593 | /* Use the right PLT. */ |
| 9594 | plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry |
| 9595 | : ppc_elf_vxworks_plt_entry; |
| 9596 | |
| 9597 | /* Fill in the .plt on VxWorks. */ |
| 9598 | if (info->shared) |
| 9599 | { |
| 9600 | bfd_put_32 (output_bfd, |
| 9601 | plt_entry[0] | PPC_HA (got_offset), |
| 9602 | htab->plt->contents + ent->plt.offset + 0); |
| 9603 | bfd_put_32 (output_bfd, |
| 9604 | plt_entry[1] | PPC_LO (got_offset), |
| 9605 | htab->plt->contents + ent->plt.offset + 4); |
| 9606 | } |
| 9607 | else |
| 9608 | { |
| 9609 | bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); |
| 9610 | |
| 9611 | bfd_put_32 (output_bfd, |
| 9612 | plt_entry[0] | PPC_HA (got_loc), |
| 9613 | htab->plt->contents + ent->plt.offset + 0); |
| 9614 | bfd_put_32 (output_bfd, |
| 9615 | plt_entry[1] | PPC_LO (got_loc), |
| 9616 | htab->plt->contents + ent->plt.offset + 4); |
| 9617 | } |
| 9618 | |
| 9619 | bfd_put_32 (output_bfd, plt_entry[2], |
| 9620 | htab->plt->contents + ent->plt.offset + 8); |
| 9621 | bfd_put_32 (output_bfd, plt_entry[3], |
| 9622 | htab->plt->contents + ent->plt.offset + 12); |
| 9623 | |
| 9624 | /* This instruction is an immediate load. The value loaded is |
| 9625 | the byte offset of the R_PPC_JMP_SLOT relocation from the |
| 9626 | start of the .rela.plt section. The value is stored in the |
| 9627 | low-order 16 bits of the load instruction. */ |
| 9628 | /* NOTE: It appears that this is now an index rather than a |
| 9629 | prescaled offset. */ |
| 9630 | bfd_put_32 (output_bfd, |
| 9631 | plt_entry[4] | reloc_index, |
| 9632 | htab->plt->contents + ent->plt.offset + 16); |
| 9633 | /* This instruction is a PC-relative branch whose target is |
| 9634 | the start of the PLT section. The address of this branch |
| 9635 | instruction is 20 bytes beyond the start of this PLT entry. |
| 9636 | The address is encoded in bits 6-29, inclusive. The value |
| 9637 | stored is right-shifted by two bits, permitting a 26-bit |
| 9638 | offset. */ |
| 9639 | bfd_put_32 (output_bfd, |
| 9640 | (plt_entry[5] |
| 9641 | | (-(ent->plt.offset + 20) & 0x03fffffc)), |
| 9642 | htab->plt->contents + ent->plt.offset + 20); |
| 9643 | bfd_put_32 (output_bfd, plt_entry[6], |
| 9644 | htab->plt->contents + ent->plt.offset + 24); |
| 9645 | bfd_put_32 (output_bfd, plt_entry[7], |
| 9646 | htab->plt->contents + ent->plt.offset + 28); |
| 9647 | |
| 9648 | /* Fill in the GOT entry corresponding to this PLT slot with |
| 9649 | the address immediately after the "bctr" instruction |
| 9650 | in this PLT entry. */ |
| 9651 | bfd_put_32 (output_bfd, (htab->plt->output_section->vma |
| 9652 | + htab->plt->output_offset |
| 9653 | + ent->plt.offset + 16), |
| 9654 | htab->sgotplt->contents + got_offset); |
| 9655 | |
| 9656 | if (!info->shared) |
| 9657 | { |
| 9658 | /* Fill in a couple of entries in .rela.plt.unloaded. */ |
| 9659 | loc = htab->srelplt2->contents |
| 9660 | + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index |
| 9661 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) |
| 9662 | * sizeof (Elf32_External_Rela)); |
| 9663 | |
| 9664 | /* Provide the @ha relocation for the first instruction. */ |
| 9665 | rela.r_offset = (htab->plt->output_section->vma |
| 9666 | + htab->plt->output_offset |
| 9667 | + ent->plt.offset + 2); |
| 9668 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
| 9669 | R_PPC_ADDR16_HA); |
| 9670 | rela.r_addend = got_offset; |
| 9671 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9672 | loc += sizeof (Elf32_External_Rela); |
| 9673 | |
| 9674 | /* Provide the @l relocation for the second instruction. */ |
| 9675 | rela.r_offset = (htab->plt->output_section->vma |
| 9676 | + htab->plt->output_offset |
| 9677 | + ent->plt.offset + 6); |
| 9678 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
| 9679 | R_PPC_ADDR16_LO); |
| 9680 | rela.r_addend = got_offset; |
| 9681 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9682 | loc += sizeof (Elf32_External_Rela); |
| 9683 | |
| 9684 | /* Provide a relocation for the GOT entry corresponding to this |
| 9685 | PLT slot. Point it at the middle of the .plt entry. */ |
| 9686 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 9687 | + htab->sgotplt->output_offset |
| 9688 | + got_offset); |
| 9689 | rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, |
| 9690 | R_PPC_ADDR32); |
| 9691 | rela.r_addend = ent->plt.offset + 16; |
| 9692 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9693 | } |
| 9694 | |
| 9695 | /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. |
| 9696 | In particular, the offset for the relocation is not the |
| 9697 | address of the PLT entry for this function, as specified |
| 9698 | by the ABI. Instead, the offset is set to the address of |
| 9699 | the GOT slot for this function. See EABI 4.4.4.1. */ |
| 9700 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 9701 | + htab->sgotplt->output_offset |
| 9702 | + got_offset); |
| 9703 | |
| 9704 | } |
| 9705 | else |
| 9706 | { |
| 9707 | asection *splt = htab->plt; |
| 9708 | if (!htab->elf.dynamic_sections_created |
| 9709 | || h->dynindx == -1) |
| 9710 | splt = htab->iplt; |
| 9711 | |
| 9712 | rela.r_offset = (splt->output_section->vma |
| 9713 | + splt->output_offset |
| 9714 | + ent->plt.offset); |
| 9715 | if (htab->plt_type == PLT_OLD |
| 9716 | || !htab->elf.dynamic_sections_created |
| 9717 | || h->dynindx == -1) |
| 9718 | { |
| 9719 | /* We don't need to fill in the .plt. The ppc dynamic |
| 9720 | linker will fill it in. */ |
| 9721 | } |
| 9722 | else |
| 9723 | { |
| 9724 | bfd_vma val = (htab->glink_pltresolve + ent->plt.offset |
| 9725 | + htab->glink->output_section->vma |
| 9726 | + htab->glink->output_offset); |
| 9727 | bfd_put_32 (output_bfd, val, |
| 9728 | splt->contents + ent->plt.offset); |
| 9729 | } |
| 9730 | } |
| 9731 | |
| 9732 | /* Fill in the entry in the .rela.plt section. */ |
| 9733 | rela.r_addend = 0; |
| 9734 | if (!htab->elf.dynamic_sections_created |
| 9735 | || h->dynindx == -1) |
| 9736 | { |
| 9737 | BFD_ASSERT (h->type == STT_GNU_IFUNC |
| 9738 | && h->def_regular |
| 9739 | && (h->root.type == bfd_link_hash_defined |
| 9740 | || h->root.type == bfd_link_hash_defweak)); |
| 9741 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 9742 | rela.r_addend = SYM_VAL (h); |
| 9743 | } |
| 9744 | else |
| 9745 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 9746 | |
| 9747 | if (!htab->elf.dynamic_sections_created |
| 9748 | || h->dynindx == -1) |
| 9749 | loc = (htab->reliplt->contents |
| 9750 | + (htab->reliplt->reloc_count++ |
| 9751 | * sizeof (Elf32_External_Rela))); |
| 9752 | else |
| 9753 | loc = (htab->relplt->contents |
| 9754 | + reloc_index * sizeof (Elf32_External_Rela)); |
| 9755 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9756 | |
| 9757 | if (!h->def_regular) |
| 9758 | { |
| 9759 | /* Mark the symbol as undefined, rather than as |
| 9760 | defined in the .plt section. Leave the value if |
| 9761 | there were any relocations where pointer equality |
| 9762 | matters (this is a clue for the dynamic linker, to |
| 9763 | make function pointer comparisons work between an |
| 9764 | application and shared library), otherwise set it |
| 9765 | to zero. */ |
| 9766 | sym->st_shndx = SHN_UNDEF; |
| 9767 | if (!h->pointer_equality_needed) |
| 9768 | sym->st_value = 0; |
| 9769 | else if (!h->ref_regular_nonweak) |
| 9770 | { |
| 9771 | /* This breaks function pointer comparisons, but |
| 9772 | that is better than breaking tests for a NULL |
| 9773 | function pointer. */ |
| 9774 | sym->st_value = 0; |
| 9775 | } |
| 9776 | } |
| 9777 | else if (h->type == STT_GNU_IFUNC |
| 9778 | && !info->shared) |
| 9779 | { |
| 9780 | /* Set the value of ifunc symbols in a non-pie |
| 9781 | executable to the glink entry. This is to avoid |
| 9782 | text relocations. We can't do this for ifunc in |
| 9783 | allocate_dynrelocs, as we do for normal dynamic |
| 9784 | function symbols with plt entries, because we need |
| 9785 | to keep the original value around for the ifunc |
| 9786 | relocation. */ |
| 9787 | sym->st_shndx = (_bfd_elf_section_from_bfd_section |
| 9788 | (output_bfd, htab->glink->output_section)); |
| 9789 | sym->st_value = (ent->glink_offset |
| 9790 | + htab->glink->output_offset |
| 9791 | + htab->glink->output_section->vma); |
| 9792 | } |
| 9793 | doneone = TRUE; |
| 9794 | } |
| 9795 | |
| 9796 | if (htab->plt_type == PLT_NEW |
| 9797 | || !htab->elf.dynamic_sections_created |
| 9798 | || h->dynindx == -1) |
| 9799 | { |
| 9800 | unsigned char *p; |
| 9801 | asection *splt = htab->plt; |
| 9802 | if (!htab->elf.dynamic_sections_created |
| 9803 | || h->dynindx == -1) |
| 9804 | splt = htab->iplt; |
| 9805 | |
| 9806 | p = (unsigned char *) htab->glink->contents + ent->glink_offset; |
| 9807 | |
| 9808 | if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt) |
| 9809 | { |
| 9810 | bfd_put_32 (output_bfd, LWZ_11_3, p); |
| 9811 | p += 4; |
| 9812 | bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); |
| 9813 | p += 4; |
| 9814 | bfd_put_32 (output_bfd, MR_0_3, p); |
| 9815 | p += 4; |
| 9816 | bfd_put_32 (output_bfd, CMPWI_11_0, p); |
| 9817 | p += 4; |
| 9818 | bfd_put_32 (output_bfd, ADD_3_12_2, p); |
| 9819 | p += 4; |
| 9820 | bfd_put_32 (output_bfd, BEQLR, p); |
| 9821 | p += 4; |
| 9822 | bfd_put_32 (output_bfd, MR_3_0, p); |
| 9823 | p += 4; |
| 9824 | bfd_put_32 (output_bfd, NOP, p); |
| 9825 | p += 4; |
| 9826 | } |
| 9827 | |
| 9828 | write_glink_stub (ent, splt, p, info); |
| 9829 | |
| 9830 | if (!info->shared) |
| 9831 | /* We only need one non-PIC glink stub. */ |
| 9832 | break; |
| 9833 | } |
| 9834 | else |
| 9835 | break; |
| 9836 | } |
| 9837 | |
| 9838 | if (h->needs_copy) |
| 9839 | { |
| 9840 | asection *s; |
| 9841 | Elf_Internal_Rela rela; |
| 9842 | bfd_byte *loc; |
| 9843 | |
| 9844 | /* This symbols needs a copy reloc. Set it up. */ |
| 9845 | |
| 9846 | #ifdef DEBUG |
| 9847 | fprintf (stderr, ", copy"); |
| 9848 | #endif |
| 9849 | |
| 9850 | BFD_ASSERT (h->dynindx != -1); |
| 9851 | |
| 9852 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 9853 | s = htab->relsbss; |
| 9854 | else |
| 9855 | s = htab->relbss; |
| 9856 | BFD_ASSERT (s != NULL); |
| 9857 | |
| 9858 | rela.r_offset = SYM_VAL (h); |
| 9859 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 9860 | rela.r_addend = 0; |
| 9861 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 9862 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9863 | } |
| 9864 | |
| 9865 | #ifdef DEBUG |
| 9866 | fprintf (stderr, "\n"); |
| 9867 | #endif |
| 9868 | |
| 9869 | return TRUE; |
| 9870 | } |
| 9871 | \f |
| 9872 | static enum elf_reloc_type_class |
| 9873 | ppc_elf_reloc_type_class (const struct bfd_link_info *info, |
| 9874 | const asection *rel_sec, |
| 9875 | const Elf_Internal_Rela *rela) |
| 9876 | { |
| 9877 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 9878 | |
| 9879 | if (rel_sec == htab->reliplt) |
| 9880 | return reloc_class_ifunc; |
| 9881 | |
| 9882 | switch (ELF32_R_TYPE (rela->r_info)) |
| 9883 | { |
| 9884 | case R_PPC_RELATIVE: |
| 9885 | return reloc_class_relative; |
| 9886 | case R_PPC_JMP_SLOT: |
| 9887 | return reloc_class_plt; |
| 9888 | case R_PPC_COPY: |
| 9889 | return reloc_class_copy; |
| 9890 | default: |
| 9891 | return reloc_class_normal; |
| 9892 | } |
| 9893 | } |
| 9894 | \f |
| 9895 | /* Finish up the dynamic sections. */ |
| 9896 | |
| 9897 | static bfd_boolean |
| 9898 | ppc_elf_finish_dynamic_sections (bfd *output_bfd, |
| 9899 | struct bfd_link_info *info) |
| 9900 | { |
| 9901 | asection *sdyn; |
| 9902 | asection *splt; |
| 9903 | struct ppc_elf_link_hash_table *htab; |
| 9904 | bfd_vma got; |
| 9905 | bfd *dynobj; |
| 9906 | bfd_boolean ret = TRUE; |
| 9907 | |
| 9908 | #ifdef DEBUG |
| 9909 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 9910 | #endif |
| 9911 | |
| 9912 | htab = ppc_elf_hash_table (info); |
| 9913 | dynobj = elf_hash_table (info)->dynobj; |
| 9914 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 9915 | if (htab->is_vxworks) |
| 9916 | splt = bfd_get_linker_section (dynobj, ".plt"); |
| 9917 | else |
| 9918 | splt = NULL; |
| 9919 | |
| 9920 | got = 0; |
| 9921 | if (htab->elf.hgot != NULL) |
| 9922 | got = SYM_VAL (htab->elf.hgot); |
| 9923 | |
| 9924 | if (htab->elf.dynamic_sections_created) |
| 9925 | { |
| 9926 | Elf32_External_Dyn *dyncon, *dynconend; |
| 9927 | |
| 9928 | BFD_ASSERT (htab->plt != NULL && sdyn != NULL); |
| 9929 | |
| 9930 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 9931 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 9932 | for (; dyncon < dynconend; dyncon++) |
| 9933 | { |
| 9934 | Elf_Internal_Dyn dyn; |
| 9935 | asection *s; |
| 9936 | |
| 9937 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 9938 | |
| 9939 | switch (dyn.d_tag) |
| 9940 | { |
| 9941 | case DT_PLTGOT: |
| 9942 | if (htab->is_vxworks) |
| 9943 | s = htab->sgotplt; |
| 9944 | else |
| 9945 | s = htab->plt; |
| 9946 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 9947 | break; |
| 9948 | |
| 9949 | case DT_PLTRELSZ: |
| 9950 | dyn.d_un.d_val = htab->relplt->size; |
| 9951 | break; |
| 9952 | |
| 9953 | case DT_JMPREL: |
| 9954 | s = htab->relplt; |
| 9955 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 9956 | break; |
| 9957 | |
| 9958 | case DT_PPC_GOT: |
| 9959 | dyn.d_un.d_ptr = got; |
| 9960 | break; |
| 9961 | |
| 9962 | case DT_RELASZ: |
| 9963 | if (htab->is_vxworks) |
| 9964 | { |
| 9965 | if (htab->relplt) |
| 9966 | dyn.d_un.d_ptr -= htab->relplt->size; |
| 9967 | break; |
| 9968 | } |
| 9969 | continue; |
| 9970 | |
| 9971 | default: |
| 9972 | if (htab->is_vxworks |
| 9973 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
| 9974 | break; |
| 9975 | continue; |
| 9976 | } |
| 9977 | |
| 9978 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 9979 | } |
| 9980 | } |
| 9981 | |
| 9982 | if (htab->got != NULL) |
| 9983 | { |
| 9984 | if (htab->elf.hgot->root.u.def.section == htab->got |
| 9985 | || htab->elf.hgot->root.u.def.section == htab->sgotplt) |
| 9986 | { |
| 9987 | unsigned char *p = htab->elf.hgot->root.u.def.section->contents; |
| 9988 | |
| 9989 | p += htab->elf.hgot->root.u.def.value; |
| 9990 | if (htab->plt_type == PLT_OLD) |
| 9991 | { |
| 9992 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 |
| 9993 | so that a function can easily find the address of |
| 9994 | _GLOBAL_OFFSET_TABLE_. */ |
| 9995 | BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 |
| 9996 | < htab->elf.hgot->root.u.def.section->size); |
| 9997 | bfd_put_32 (output_bfd, 0x4e800021, p - 4); |
| 9998 | } |
| 9999 | |
| 10000 | if (sdyn != NULL) |
| 10001 | { |
| 10002 | bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; |
| 10003 | BFD_ASSERT (htab->elf.hgot->root.u.def.value |
| 10004 | < htab->elf.hgot->root.u.def.section->size); |
| 10005 | bfd_put_32 (output_bfd, val, p); |
| 10006 | } |
| 10007 | } |
| 10008 | else |
| 10009 | { |
| 10010 | info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), |
| 10011 | htab->elf.hgot->root.root.string, |
| 10012 | (htab->sgotplt != NULL |
| 10013 | ? htab->sgotplt->name : htab->got->name)); |
| 10014 | bfd_set_error (bfd_error_bad_value); |
| 10015 | ret = FALSE; |
| 10016 | } |
| 10017 | |
| 10018 | elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; |
| 10019 | } |
| 10020 | |
| 10021 | /* Fill in the first entry in the VxWorks procedure linkage table. */ |
| 10022 | if (splt && splt->size > 0) |
| 10023 | { |
| 10024 | /* Use the right PLT. */ |
| 10025 | const bfd_vma *plt_entry = (info->shared |
| 10026 | ? ppc_elf_vxworks_pic_plt0_entry |
| 10027 | : ppc_elf_vxworks_plt0_entry); |
| 10028 | |
| 10029 | if (!info->shared) |
| 10030 | { |
| 10031 | bfd_vma got_value = SYM_VAL (htab->elf.hgot); |
| 10032 | |
| 10033 | bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), |
| 10034 | splt->contents + 0); |
| 10035 | bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), |
| 10036 | splt->contents + 4); |
| 10037 | } |
| 10038 | else |
| 10039 | { |
| 10040 | bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); |
| 10041 | bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); |
| 10042 | } |
| 10043 | bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); |
| 10044 | bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); |
| 10045 | bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); |
| 10046 | bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); |
| 10047 | bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); |
| 10048 | bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); |
| 10049 | |
| 10050 | if (! info->shared) |
| 10051 | { |
| 10052 | Elf_Internal_Rela rela; |
| 10053 | bfd_byte *loc; |
| 10054 | |
| 10055 | loc = htab->srelplt2->contents; |
| 10056 | |
| 10057 | /* Output the @ha relocation for the first instruction. */ |
| 10058 | rela.r_offset = (htab->plt->output_section->vma |
| 10059 | + htab->plt->output_offset |
| 10060 | + 2); |
| 10061 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
| 10062 | rela.r_addend = 0; |
| 10063 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 10064 | loc += sizeof (Elf32_External_Rela); |
| 10065 | |
| 10066 | /* Output the @l relocation for the second instruction. */ |
| 10067 | rela.r_offset = (htab->plt->output_section->vma |
| 10068 | + htab->plt->output_offset |
| 10069 | + 6); |
| 10070 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
| 10071 | rela.r_addend = 0; |
| 10072 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 10073 | loc += sizeof (Elf32_External_Rela); |
| 10074 | |
| 10075 | /* Fix up the remaining relocations. They may have the wrong |
| 10076 | symbol index for _G_O_T_ or _P_L_T_ depending on the order |
| 10077 | in which symbols were output. */ |
| 10078 | while (loc < htab->srelplt2->contents + htab->srelplt2->size) |
| 10079 | { |
| 10080 | Elf_Internal_Rela rel; |
| 10081 | |
| 10082 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 10083 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
| 10084 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 10085 | loc += sizeof (Elf32_External_Rela); |
| 10086 | |
| 10087 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 10088 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
| 10089 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 10090 | loc += sizeof (Elf32_External_Rela); |
| 10091 | |
| 10092 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 10093 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); |
| 10094 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 10095 | loc += sizeof (Elf32_External_Rela); |
| 10096 | } |
| 10097 | } |
| 10098 | } |
| 10099 | |
| 10100 | if (htab->glink != NULL |
| 10101 | && htab->glink->contents != NULL |
| 10102 | && htab->elf.dynamic_sections_created) |
| 10103 | { |
| 10104 | unsigned char *p; |
| 10105 | unsigned char *endp; |
| 10106 | bfd_vma res0; |
| 10107 | unsigned int i; |
| 10108 | |
| 10109 | /* |
| 10110 | * PIC glink code is the following: |
| 10111 | * |
| 10112 | * # ith PLT code stub. |
| 10113 | * addis 11,30,(plt+(i-1)*4-got)@ha |
| 10114 | * lwz 11,(plt+(i-1)*4-got)@l(11) |
| 10115 | * mtctr 11 |
| 10116 | * bctr |
| 10117 | * |
| 10118 | * # A table of branches, one for each plt entry. |
| 10119 | * # The idea is that the plt call stub loads ctr and r11 with these |
| 10120 | * # addresses, so (r11 - res_0) gives the plt index * 4. |
| 10121 | * res_0: b PLTresolve |
| 10122 | * res_1: b PLTresolve |
| 10123 | * . |
| 10124 | * # Some number of entries towards the end can be nops |
| 10125 | * res_n_m3: nop |
| 10126 | * res_n_m2: nop |
| 10127 | * res_n_m1: |
| 10128 | * |
| 10129 | * PLTresolve: |
| 10130 | * addis 11,11,(1f-res_0)@ha |
| 10131 | * mflr 0 |
| 10132 | * bcl 20,31,1f |
| 10133 | * 1: addi 11,11,(1b-res_0)@l |
| 10134 | * mflr 12 |
| 10135 | * mtlr 0 |
| 10136 | * sub 11,11,12 # r11 = index * 4 |
| 10137 | * addis 12,12,(got+4-1b)@ha |
| 10138 | * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve |
| 10139 | * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address |
| 10140 | * mtctr 0 |
| 10141 | * add 0,11,11 |
| 10142 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
| 10143 | * bctr |
| 10144 | */ |
| 10145 | static const unsigned int pic_plt_resolve[] = |
| 10146 | { |
| 10147 | ADDIS_11_11, |
| 10148 | MFLR_0, |
| 10149 | BCL_20_31, |
| 10150 | ADDI_11_11, |
| 10151 | MFLR_12, |
| 10152 | MTLR_0, |
| 10153 | SUB_11_11_12, |
| 10154 | ADDIS_12_12, |
| 10155 | LWZ_0_12, |
| 10156 | LWZ_12_12, |
| 10157 | MTCTR_0, |
| 10158 | ADD_0_11_11, |
| 10159 | ADD_11_0_11, |
| 10160 | BCTR, |
| 10161 | NOP, |
| 10162 | NOP |
| 10163 | }; |
| 10164 | |
| 10165 | /* |
| 10166 | * Non-PIC glink code is a little simpler. |
| 10167 | * |
| 10168 | * # ith PLT code stub. |
| 10169 | * lis 11,(plt+(i-1)*4)@ha |
| 10170 | * lwz 11,(plt+(i-1)*4)@l(11) |
| 10171 | * mtctr 11 |
| 10172 | * bctr |
| 10173 | * |
| 10174 | * The branch table is the same, then comes |
| 10175 | * |
| 10176 | * PLTresolve: |
| 10177 | * lis 12,(got+4)@ha |
| 10178 | * addis 11,11,(-res_0)@ha |
| 10179 | * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve |
| 10180 | * addi 11,11,(-res_0)@l # r11 = index * 4 |
| 10181 | * mtctr 0 |
| 10182 | * add 0,11,11 |
| 10183 | * lwz 12,(got+8)@l(12) # got[2] contains the map address |
| 10184 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
| 10185 | * bctr |
| 10186 | */ |
| 10187 | static const unsigned int plt_resolve[] = |
| 10188 | { |
| 10189 | LIS_12, |
| 10190 | ADDIS_11_11, |
| 10191 | LWZ_0_12, |
| 10192 | ADDI_11_11, |
| 10193 | MTCTR_0, |
| 10194 | ADD_0_11_11, |
| 10195 | LWZ_12_12, |
| 10196 | ADD_11_0_11, |
| 10197 | BCTR, |
| 10198 | NOP, |
| 10199 | NOP, |
| 10200 | NOP, |
| 10201 | NOP, |
| 10202 | NOP, |
| 10203 | NOP, |
| 10204 | NOP |
| 10205 | }; |
| 10206 | |
| 10207 | if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) |
| 10208 | abort (); |
| 10209 | if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) |
| 10210 | abort (); |
| 10211 | |
| 10212 | /* Build the branch table, one for each plt entry (less one), |
| 10213 | and perhaps some padding. */ |
| 10214 | p = htab->glink->contents; |
| 10215 | p += htab->glink_pltresolve; |
| 10216 | endp = htab->glink->contents; |
| 10217 | endp += htab->glink->size - GLINK_PLTRESOLVE; |
| 10218 | while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4)) |
| 10219 | { |
| 10220 | bfd_put_32 (output_bfd, B + endp - p, p); |
| 10221 | p += 4; |
| 10222 | } |
| 10223 | while (p < endp) |
| 10224 | { |
| 10225 | bfd_put_32 (output_bfd, NOP, p); |
| 10226 | p += 4; |
| 10227 | } |
| 10228 | |
| 10229 | res0 = (htab->glink_pltresolve |
| 10230 | + htab->glink->output_section->vma |
| 10231 | + htab->glink->output_offset); |
| 10232 | |
| 10233 | if (htab->params->ppc476_workaround) |
| 10234 | { |
| 10235 | /* Ensure that a call stub at the end of a page doesn't |
| 10236 | result in prefetch over the end of the page into the |
| 10237 | glink branch table. */ |
| 10238 | bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; |
| 10239 | bfd_vma page_addr; |
| 10240 | bfd_vma glink_start = (htab->glink->output_section->vma |
| 10241 | + htab->glink->output_offset); |
| 10242 | |
| 10243 | for (page_addr = res0 & -pagesize; |
| 10244 | page_addr > glink_start; |
| 10245 | page_addr -= pagesize) |
| 10246 | { |
| 10247 | /* We have a plt call stub that may need fixing. */ |
| 10248 | bfd_byte *loc; |
| 10249 | unsigned int insn; |
| 10250 | |
| 10251 | loc = htab->glink->contents + page_addr - 4 - glink_start; |
| 10252 | insn = bfd_get_32 (output_bfd, loc); |
| 10253 | if (insn == BCTR) |
| 10254 | { |
| 10255 | /* By alignment, we know that there must be at least |
| 10256 | one other call stub before this one. */ |
| 10257 | insn = bfd_get_32 (output_bfd, loc - 16); |
| 10258 | if (insn == BCTR) |
| 10259 | bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc); |
| 10260 | else |
| 10261 | bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc); |
| 10262 | } |
| 10263 | } |
| 10264 | } |
| 10265 | |
| 10266 | /* Last comes the PLTresolve stub. */ |
| 10267 | if (info->shared) |
| 10268 | { |
| 10269 | bfd_vma bcl; |
| 10270 | |
| 10271 | for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) |
| 10272 | { |
| 10273 | unsigned int insn = pic_plt_resolve[i]; |
| 10274 | |
| 10275 | if (htab->params->ppc476_workaround && insn == NOP) |
| 10276 | insn = BA + 0; |
| 10277 | bfd_put_32 (output_bfd, insn, p); |
| 10278 | p += 4; |
| 10279 | } |
| 10280 | p -= 4 * ARRAY_SIZE (pic_plt_resolve); |
| 10281 | |
| 10282 | bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 |
| 10283 | + htab->glink->output_section->vma |
| 10284 | + htab->glink->output_offset); |
| 10285 | |
| 10286 | bfd_put_32 (output_bfd, |
| 10287 | ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); |
| 10288 | bfd_put_32 (output_bfd, |
| 10289 | ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); |
| 10290 | bfd_put_32 (output_bfd, |
| 10291 | ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); |
| 10292 | if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) |
| 10293 | { |
| 10294 | bfd_put_32 (output_bfd, |
| 10295 | LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); |
| 10296 | bfd_put_32 (output_bfd, |
| 10297 | LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); |
| 10298 | } |
| 10299 | else |
| 10300 | { |
| 10301 | bfd_put_32 (output_bfd, |
| 10302 | LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); |
| 10303 | bfd_put_32 (output_bfd, |
| 10304 | LWZ_12_12 + 4, p + 9*4); |
| 10305 | } |
| 10306 | } |
| 10307 | else |
| 10308 | { |
| 10309 | for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) |
| 10310 | { |
| 10311 | unsigned int insn = plt_resolve[i]; |
| 10312 | |
| 10313 | if (htab->params->ppc476_workaround && insn == NOP) |
| 10314 | insn = BA + 0; |
| 10315 | bfd_put_32 (output_bfd, insn, p); |
| 10316 | p += 4; |
| 10317 | } |
| 10318 | p -= 4 * ARRAY_SIZE (plt_resolve); |
| 10319 | |
| 10320 | bfd_put_32 (output_bfd, |
| 10321 | LIS_12 + PPC_HA (got + 4), p + 0*4); |
| 10322 | bfd_put_32 (output_bfd, |
| 10323 | ADDIS_11_11 + PPC_HA (-res0), p + 1*4); |
| 10324 | bfd_put_32 (output_bfd, |
| 10325 | ADDI_11_11 + PPC_LO (-res0), p + 3*4); |
| 10326 | if (PPC_HA (got + 4) == PPC_HA (got + 8)) |
| 10327 | { |
| 10328 | bfd_put_32 (output_bfd, |
| 10329 | LWZ_0_12 + PPC_LO (got + 4), p + 2*4); |
| 10330 | bfd_put_32 (output_bfd, |
| 10331 | LWZ_12_12 + PPC_LO (got + 8), p + 6*4); |
| 10332 | } |
| 10333 | else |
| 10334 | { |
| 10335 | bfd_put_32 (output_bfd, |
| 10336 | LWZU_0_12 + PPC_LO (got + 4), p + 2*4); |
| 10337 | bfd_put_32 (output_bfd, |
| 10338 | LWZ_12_12 + 4, p + 6*4); |
| 10339 | } |
| 10340 | } |
| 10341 | } |
| 10342 | |
| 10343 | if (htab->glink_eh_frame != NULL |
| 10344 | && htab->glink_eh_frame->contents != NULL) |
| 10345 | { |
| 10346 | unsigned char *p = htab->glink_eh_frame->contents; |
| 10347 | bfd_vma val; |
| 10348 | |
| 10349 | p += sizeof (glink_eh_frame_cie); |
| 10350 | /* FDE length. */ |
| 10351 | p += 4; |
| 10352 | /* CIE pointer. */ |
| 10353 | p += 4; |
| 10354 | /* Offset to .glink. */ |
| 10355 | val = (htab->glink->output_section->vma |
| 10356 | + htab->glink->output_offset); |
| 10357 | val -= (htab->glink_eh_frame->output_section->vma |
| 10358 | + htab->glink_eh_frame->output_offset); |
| 10359 | val -= p - htab->glink_eh_frame->contents; |
| 10360 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 10361 | |
| 10362 | if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME |
| 10363 | && !_bfd_elf_write_section_eh_frame (output_bfd, info, |
| 10364 | htab->glink_eh_frame, |
| 10365 | htab->glink_eh_frame->contents)) |
| 10366 | return FALSE; |
| 10367 | } |
| 10368 | |
| 10369 | return ret; |
| 10370 | } |
| 10371 | \f |
| 10372 | #define TARGET_LITTLE_SYM powerpc_elf32_le_vec |
| 10373 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 10374 | #define TARGET_BIG_SYM powerpc_elf32_vec |
| 10375 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 10376 | #define ELF_ARCH bfd_arch_powerpc |
| 10377 | #define ELF_TARGET_ID PPC32_ELF_DATA |
| 10378 | #define ELF_MACHINE_CODE EM_PPC |
| 10379 | #ifdef __QNXTARGET__ |
| 10380 | #define ELF_MAXPAGESIZE 0x1000 |
| 10381 | #define ELF_COMMONPAGESIZE 0x1000 |
| 10382 | #else |
| 10383 | #define ELF_MAXPAGESIZE 0x10000 |
| 10384 | #define ELF_COMMONPAGESIZE 0x10000 |
| 10385 | #endif |
| 10386 | #define ELF_MINPAGESIZE 0x1000 |
| 10387 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 10388 | |
| 10389 | #ifdef EM_CYGNUS_POWERPC |
| 10390 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 10391 | #endif |
| 10392 | |
| 10393 | #ifdef EM_PPC_OLD |
| 10394 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 10395 | #endif |
| 10396 | |
| 10397 | #define elf_backend_plt_not_loaded 1 |
| 10398 | #define elf_backend_can_gc_sections 1 |
| 10399 | #define elf_backend_can_refcount 1 |
| 10400 | #define elf_backend_rela_normal 1 |
| 10401 | #define elf_backend_caches_rawsize 1 |
| 10402 | |
| 10403 | #define bfd_elf32_mkobject ppc_elf_mkobject |
| 10404 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 10405 | #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
| 10406 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 10407 | #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup |
| 10408 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 10409 | #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create |
| 10410 | #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab |
| 10411 | |
| 10412 | #define elf_backend_object_p ppc_elf_object_p |
| 10413 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| 10414 | #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| 10415 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 10416 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 10417 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| 10418 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 10419 | #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol |
| 10420 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 10421 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 10422 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 10423 | #define elf_backend_hash_symbol ppc_elf_hash_symbol |
| 10424 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 10425 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 10426 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 10427 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 10428 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| 10429 | #define elf_backend_grok_prstatus ppc_elf_grok_prstatus |
| 10430 | #define elf_backend_grok_psinfo ppc_elf_grok_psinfo |
| 10431 | #define elf_backend_write_core_note ppc_elf_write_core_note |
| 10432 | #define elf_backend_reloc_type_class ppc_elf_reloc_type_class |
| 10433 | #define elf_backend_begin_write_processing ppc_elf_begin_write_processing |
| 10434 | #define elf_backend_final_write_processing ppc_elf_final_write_processing |
| 10435 | #define elf_backend_write_section ppc_elf_write_section |
| 10436 | #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr |
| 10437 | #define elf_backend_plt_sym_val ppc_elf_plt_sym_val |
| 10438 | #define elf_backend_action_discarded ppc_elf_action_discarded |
| 10439 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 10440 | #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags |
| 10441 | #define elf_backend_section_processing ppc_elf_section_processing |
| 10442 | |
| 10443 | #include "elf32-target.h" |
| 10444 | |
| 10445 | /* FreeBSD Target */ |
| 10446 | |
| 10447 | #undef TARGET_LITTLE_SYM |
| 10448 | #undef TARGET_LITTLE_NAME |
| 10449 | |
| 10450 | #undef TARGET_BIG_SYM |
| 10451 | #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec |
| 10452 | #undef TARGET_BIG_NAME |
| 10453 | #define TARGET_BIG_NAME "elf32-powerpc-freebsd" |
| 10454 | |
| 10455 | #undef ELF_OSABI |
| 10456 | #define ELF_OSABI ELFOSABI_FREEBSD |
| 10457 | |
| 10458 | #undef elf32_bed |
| 10459 | #define elf32_bed elf32_powerpc_fbsd_bed |
| 10460 | |
| 10461 | #include "elf32-target.h" |
| 10462 | |
| 10463 | /* VxWorks Target */ |
| 10464 | |
| 10465 | #undef TARGET_LITTLE_SYM |
| 10466 | #undef TARGET_LITTLE_NAME |
| 10467 | |
| 10468 | #undef TARGET_BIG_SYM |
| 10469 | #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec |
| 10470 | #undef TARGET_BIG_NAME |
| 10471 | #define TARGET_BIG_NAME "elf32-powerpc-vxworks" |
| 10472 | |
| 10473 | #undef ELF_OSABI |
| 10474 | |
| 10475 | /* VxWorks uses the elf default section flags for .plt. */ |
| 10476 | static const struct bfd_elf_special_section * |
| 10477 | ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 10478 | { |
| 10479 | if (sec->name == NULL) |
| 10480 | return NULL; |
| 10481 | |
| 10482 | if (strcmp (sec->name, ".plt") == 0) |
| 10483 | return _bfd_elf_get_sec_type_attr (abfd, sec); |
| 10484 | |
| 10485 | return ppc_elf_get_sec_type_attr (abfd, sec); |
| 10486 | } |
| 10487 | |
| 10488 | /* Like ppc_elf_link_hash_table_create, but overrides |
| 10489 | appropriately for VxWorks. */ |
| 10490 | static struct bfd_link_hash_table * |
| 10491 | ppc_elf_vxworks_link_hash_table_create (bfd *abfd) |
| 10492 | { |
| 10493 | struct bfd_link_hash_table *ret; |
| 10494 | |
| 10495 | ret = ppc_elf_link_hash_table_create (abfd); |
| 10496 | if (ret) |
| 10497 | { |
| 10498 | struct ppc_elf_link_hash_table *htab |
| 10499 | = (struct ppc_elf_link_hash_table *)ret; |
| 10500 | htab->is_vxworks = 1; |
| 10501 | htab->plt_type = PLT_VXWORKS; |
| 10502 | htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; |
| 10503 | htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; |
| 10504 | htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; |
| 10505 | } |
| 10506 | return ret; |
| 10507 | } |
| 10508 | |
| 10509 | /* Tweak magic VxWorks symbols as they are loaded. */ |
| 10510 | static bfd_boolean |
| 10511 | ppc_elf_vxworks_add_symbol_hook (bfd *abfd, |
| 10512 | struct bfd_link_info *info, |
| 10513 | Elf_Internal_Sym *sym, |
| 10514 | const char **namep ATTRIBUTE_UNUSED, |
| 10515 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 10516 | asection **secp, |
| 10517 | bfd_vma *valp) |
| 10518 | { |
| 10519 | if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, |
| 10520 | valp)) |
| 10521 | return FALSE; |
| 10522 | |
| 10523 | return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); |
| 10524 | } |
| 10525 | |
| 10526 | static void |
| 10527 | ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) |
| 10528 | { |
| 10529 | ppc_elf_final_write_processing(abfd, linker); |
| 10530 | elf_vxworks_final_write_processing(abfd, linker); |
| 10531 | } |
| 10532 | |
| 10533 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so |
| 10534 | define it. */ |
| 10535 | #undef elf_backend_want_plt_sym |
| 10536 | #define elf_backend_want_plt_sym 1 |
| 10537 | #undef elf_backend_want_got_plt |
| 10538 | #define elf_backend_want_got_plt 1 |
| 10539 | #undef elf_backend_got_symbol_offset |
| 10540 | #define elf_backend_got_symbol_offset 0 |
| 10541 | #undef elf_backend_plt_not_loaded |
| 10542 | #define elf_backend_plt_not_loaded 0 |
| 10543 | #undef elf_backend_plt_readonly |
| 10544 | #define elf_backend_plt_readonly 1 |
| 10545 | #undef elf_backend_got_header_size |
| 10546 | #define elf_backend_got_header_size 12 |
| 10547 | |
| 10548 | #undef bfd_elf32_get_synthetic_symtab |
| 10549 | |
| 10550 | #undef bfd_elf32_bfd_link_hash_table_create |
| 10551 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 10552 | ppc_elf_vxworks_link_hash_table_create |
| 10553 | #undef elf_backend_add_symbol_hook |
| 10554 | #define elf_backend_add_symbol_hook \ |
| 10555 | ppc_elf_vxworks_add_symbol_hook |
| 10556 | #undef elf_backend_link_output_symbol_hook |
| 10557 | #define elf_backend_link_output_symbol_hook \ |
| 10558 | elf_vxworks_link_output_symbol_hook |
| 10559 | #undef elf_backend_final_write_processing |
| 10560 | #define elf_backend_final_write_processing \ |
| 10561 | ppc_elf_vxworks_final_write_processing |
| 10562 | #undef elf_backend_get_sec_type_attr |
| 10563 | #define elf_backend_get_sec_type_attr \ |
| 10564 | ppc_elf_vxworks_get_sec_type_attr |
| 10565 | #undef elf_backend_emit_relocs |
| 10566 | #define elf_backend_emit_relocs \ |
| 10567 | elf_vxworks_emit_relocs |
| 10568 | |
| 10569 | #undef elf32_bed |
| 10570 | #define elf32_bed ppc_elf_vxworks_bed |
| 10571 | #undef elf_backend_post_process_headers |
| 10572 | |
| 10573 | #include "elf32-target.h" |