| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
| 3 | 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 4 | Written by Ian Lance Taylor, Cygnus Support. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the |
| 20 | Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | |
| 24 | /* This file is based on a preliminary PowerPC ELF ABI. The |
| 25 | information may not match the final PowerPC ELF ABI. It includes |
| 26 | suggestions from the in-progress Embedded PowerPC ABI, and that |
| 27 | information may also not match. */ |
| 28 | |
| 29 | #include "sysdep.h" |
| 30 | #include <stdarg.h> |
| 31 | #include "bfd.h" |
| 32 | #include "bfdlink.h" |
| 33 | #include "libbfd.h" |
| 34 | #include "elf-bfd.h" |
| 35 | #include "elf/ppc.h" |
| 36 | #include "elf32-ppc.h" |
| 37 | #include "elf-vxworks.h" |
| 38 | |
| 39 | /* RELA relocations are used here. */ |
| 40 | |
| 41 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 42 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 43 | static bfd_reloc_status_type ppc_elf_unhandled_reloc |
| 44 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 45 | |
| 46 | /* Branch prediction bit for branch taken relocs. */ |
| 47 | #define BRANCH_PREDICT_BIT 0x200000 |
| 48 | /* Mask to set RA in memory instructions. */ |
| 49 | #define RA_REGISTER_MASK 0x001f0000 |
| 50 | /* Value to shift register by to insert RA. */ |
| 51 | #define RA_REGISTER_SHIFT 16 |
| 52 | |
| 53 | /* The name of the dynamic interpreter. This is put in the .interp |
| 54 | section. */ |
| 55 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 56 | |
| 57 | /* For old-style PLT. */ |
| 58 | /* The number of single-slot PLT entries (the rest use two slots). */ |
| 59 | #define PLT_NUM_SINGLE_ENTRIES 8192 |
| 60 | |
| 61 | /* For new-style .glink and .plt. */ |
| 62 | #define GLINK_PLTRESOLVE 16*4 |
| 63 | #define GLINK_ENTRY_SIZE 4*4 |
| 64 | #define TLS_GET_ADDR_GLINK_SIZE 12*4 |
| 65 | |
| 66 | /* VxWorks uses its own plt layout, filled in by the static linker. */ |
| 67 | |
| 68 | /* The standard VxWorks PLT entry. */ |
| 69 | #define VXWORKS_PLT_ENTRY_SIZE 32 |
| 70 | static const bfd_vma ppc_elf_vxworks_plt_entry |
| 71 | [VXWORKS_PLT_ENTRY_SIZE / 4] = |
| 72 | { |
| 73 | 0x3d800000, /* lis r12,0 */ |
| 74 | 0x818c0000, /* lwz r12,0(r12) */ |
| 75 | 0x7d8903a6, /* mtctr r12 */ |
| 76 | 0x4e800420, /* bctr */ |
| 77 | 0x39600000, /* li r11,0 */ |
| 78 | 0x48000000, /* b 14 <.PLT0resolve+0x4> */ |
| 79 | 0x60000000, /* nop */ |
| 80 | 0x60000000, /* nop */ |
| 81 | }; |
| 82 | static const bfd_vma ppc_elf_vxworks_pic_plt_entry |
| 83 | [VXWORKS_PLT_ENTRY_SIZE / 4] = |
| 84 | { |
| 85 | 0x3d9e0000, /* addis r12,r30,0 */ |
| 86 | 0x818c0000, /* lwz r12,0(r12) */ |
| 87 | 0x7d8903a6, /* mtctr r12 */ |
| 88 | 0x4e800420, /* bctr */ |
| 89 | 0x39600000, /* li r11,0 */ |
| 90 | 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ |
| 91 | 0x60000000, /* nop */ |
| 92 | 0x60000000, /* nop */ |
| 93 | }; |
| 94 | |
| 95 | /* The initial VxWorks PLT entry. */ |
| 96 | #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 |
| 97 | static const bfd_vma ppc_elf_vxworks_plt0_entry |
| 98 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = |
| 99 | { |
| 100 | 0x3d800000, /* lis r12,0 */ |
| 101 | 0x398c0000, /* addi r12,r12,0 */ |
| 102 | 0x800c0008, /* lwz r0,8(r12) */ |
| 103 | 0x7c0903a6, /* mtctr r0 */ |
| 104 | 0x818c0004, /* lwz r12,4(r12) */ |
| 105 | 0x4e800420, /* bctr */ |
| 106 | 0x60000000, /* nop */ |
| 107 | 0x60000000, /* nop */ |
| 108 | }; |
| 109 | static const bfd_vma ppc_elf_vxworks_pic_plt0_entry |
| 110 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = |
| 111 | { |
| 112 | 0x819e0008, /* lwz r12,8(r30) */ |
| 113 | 0x7d8903a6, /* mtctr r12 */ |
| 114 | 0x819e0004, /* lwz r12,4(r30) */ |
| 115 | 0x4e800420, /* bctr */ |
| 116 | 0x60000000, /* nop */ |
| 117 | 0x60000000, /* nop */ |
| 118 | 0x60000000, /* nop */ |
| 119 | 0x60000000, /* nop */ |
| 120 | }; |
| 121 | |
| 122 | /* For executables, we have some additional relocations in |
| 123 | .rela.plt.unloaded, for the kernel loader. */ |
| 124 | |
| 125 | /* The number of non-JMP_SLOT relocations per PLT0 slot. */ |
| 126 | #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 |
| 127 | /* The number of relocations in the PLTResolve slot. */ |
| 128 | #define VXWORKS_PLTRESOLVE_RELOCS 2 |
| 129 | /* The number of relocations in the PLTResolve slot when when creating |
| 130 | a shared library. */ |
| 131 | #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 |
| 132 | |
| 133 | /* Some instructions. */ |
| 134 | #define ADDIS_11_11 0x3d6b0000 |
| 135 | #define ADDIS_11_30 0x3d7e0000 |
| 136 | #define ADDIS_12_12 0x3d8c0000 |
| 137 | #define ADDI_11_11 0x396b0000 |
| 138 | #define ADD_0_11_11 0x7c0b5a14 |
| 139 | #define ADD_3_12_2 0x7c6c1214 |
| 140 | #define ADD_11_0_11 0x7d605a14 |
| 141 | #define B 0x48000000 |
| 142 | #define BCL_20_31 0x429f0005 |
| 143 | #define BCTR 0x4e800420 |
| 144 | #define BEQLR 0x4d820020 |
| 145 | #define CMPWI_11_0 0x2c0b0000 |
| 146 | #define LIS_11 0x3d600000 |
| 147 | #define LIS_12 0x3d800000 |
| 148 | #define LWZU_0_12 0x840c0000 |
| 149 | #define LWZ_0_12 0x800c0000 |
| 150 | #define LWZ_11_3 0x81630000 |
| 151 | #define LWZ_11_11 0x816b0000 |
| 152 | #define LWZ_11_30 0x817e0000 |
| 153 | #define LWZ_12_3 0x81830000 |
| 154 | #define LWZ_12_12 0x818c0000 |
| 155 | #define MR_0_3 0x7c601b78 |
| 156 | #define MR_3_0 0x7c030378 |
| 157 | #define MFLR_0 0x7c0802a6 |
| 158 | #define MFLR_12 0x7d8802a6 |
| 159 | #define MTCTR_0 0x7c0903a6 |
| 160 | #define MTCTR_11 0x7d6903a6 |
| 161 | #define MTLR_0 0x7c0803a6 |
| 162 | #define NOP 0x60000000 |
| 163 | #define SUB_11_11_12 0x7d6c5850 |
| 164 | |
| 165 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 166 | #define TP_OFFSET 0x7000 |
| 167 | #define DTP_OFFSET 0x8000 |
| 168 | |
| 169 | /* The value of a defined global symbol. */ |
| 170 | #define SYM_VAL(SYM) \ |
| 171 | ((SYM)->root.u.def.section->output_section->vma \ |
| 172 | + (SYM)->root.u.def.section->output_offset \ |
| 173 | + (SYM)->root.u.def.value) |
| 174 | \f |
| 175 | static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; |
| 176 | |
| 177 | static reloc_howto_type ppc_elf_howto_raw[] = { |
| 178 | /* This reloc does nothing. */ |
| 179 | HOWTO (R_PPC_NONE, /* type */ |
| 180 | 0, /* rightshift */ |
| 181 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 182 | 32, /* bitsize */ |
| 183 | FALSE, /* pc_relative */ |
| 184 | 0, /* bitpos */ |
| 185 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 186 | bfd_elf_generic_reloc, /* special_function */ |
| 187 | "R_PPC_NONE", /* name */ |
| 188 | FALSE, /* partial_inplace */ |
| 189 | 0, /* src_mask */ |
| 190 | 0, /* dst_mask */ |
| 191 | FALSE), /* pcrel_offset */ |
| 192 | |
| 193 | /* A standard 32 bit relocation. */ |
| 194 | HOWTO (R_PPC_ADDR32, /* type */ |
| 195 | 0, /* rightshift */ |
| 196 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 197 | 32, /* bitsize */ |
| 198 | FALSE, /* pc_relative */ |
| 199 | 0, /* bitpos */ |
| 200 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 201 | bfd_elf_generic_reloc, /* special_function */ |
| 202 | "R_PPC_ADDR32", /* name */ |
| 203 | FALSE, /* partial_inplace */ |
| 204 | 0, /* src_mask */ |
| 205 | 0xffffffff, /* dst_mask */ |
| 206 | FALSE), /* pcrel_offset */ |
| 207 | |
| 208 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 209 | FIXME: we don't check that, we just clear them. */ |
| 210 | HOWTO (R_PPC_ADDR24, /* type */ |
| 211 | 0, /* rightshift */ |
| 212 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 213 | 26, /* bitsize */ |
| 214 | FALSE, /* pc_relative */ |
| 215 | 0, /* bitpos */ |
| 216 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 217 | bfd_elf_generic_reloc, /* special_function */ |
| 218 | "R_PPC_ADDR24", /* name */ |
| 219 | FALSE, /* partial_inplace */ |
| 220 | 0, /* src_mask */ |
| 221 | 0x3fffffc, /* dst_mask */ |
| 222 | FALSE), /* pcrel_offset */ |
| 223 | |
| 224 | /* A standard 16 bit relocation. */ |
| 225 | HOWTO (R_PPC_ADDR16, /* type */ |
| 226 | 0, /* rightshift */ |
| 227 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 228 | 16, /* bitsize */ |
| 229 | FALSE, /* pc_relative */ |
| 230 | 0, /* bitpos */ |
| 231 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 232 | bfd_elf_generic_reloc, /* special_function */ |
| 233 | "R_PPC_ADDR16", /* name */ |
| 234 | FALSE, /* partial_inplace */ |
| 235 | 0, /* src_mask */ |
| 236 | 0xffff, /* dst_mask */ |
| 237 | FALSE), /* pcrel_offset */ |
| 238 | |
| 239 | /* A 16 bit relocation without overflow. */ |
| 240 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 241 | 0, /* rightshift */ |
| 242 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 243 | 16, /* bitsize */ |
| 244 | FALSE, /* pc_relative */ |
| 245 | 0, /* bitpos */ |
| 246 | complain_overflow_dont,/* complain_on_overflow */ |
| 247 | bfd_elf_generic_reloc, /* special_function */ |
| 248 | "R_PPC_ADDR16_LO", /* name */ |
| 249 | FALSE, /* partial_inplace */ |
| 250 | 0, /* src_mask */ |
| 251 | 0xffff, /* dst_mask */ |
| 252 | FALSE), /* pcrel_offset */ |
| 253 | |
| 254 | /* The high order 16 bits of an address. */ |
| 255 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 256 | 16, /* rightshift */ |
| 257 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 258 | 16, /* bitsize */ |
| 259 | FALSE, /* pc_relative */ |
| 260 | 0, /* bitpos */ |
| 261 | complain_overflow_dont, /* complain_on_overflow */ |
| 262 | bfd_elf_generic_reloc, /* special_function */ |
| 263 | "R_PPC_ADDR16_HI", /* name */ |
| 264 | FALSE, /* partial_inplace */ |
| 265 | 0, /* src_mask */ |
| 266 | 0xffff, /* dst_mask */ |
| 267 | FALSE), /* pcrel_offset */ |
| 268 | |
| 269 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 270 | the low 16 bits, treated as a signed number, is negative. */ |
| 271 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 272 | 16, /* rightshift */ |
| 273 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 274 | 16, /* bitsize */ |
| 275 | FALSE, /* pc_relative */ |
| 276 | 0, /* bitpos */ |
| 277 | complain_overflow_dont, /* complain_on_overflow */ |
| 278 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 279 | "R_PPC_ADDR16_HA", /* name */ |
| 280 | FALSE, /* partial_inplace */ |
| 281 | 0, /* src_mask */ |
| 282 | 0xffff, /* dst_mask */ |
| 283 | FALSE), /* pcrel_offset */ |
| 284 | |
| 285 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 286 | FIXME: we don't check that, we just clear them. */ |
| 287 | HOWTO (R_PPC_ADDR14, /* type */ |
| 288 | 0, /* rightshift */ |
| 289 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 290 | 16, /* bitsize */ |
| 291 | FALSE, /* pc_relative */ |
| 292 | 0, /* bitpos */ |
| 293 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 294 | bfd_elf_generic_reloc, /* special_function */ |
| 295 | "R_PPC_ADDR14", /* name */ |
| 296 | FALSE, /* partial_inplace */ |
| 297 | 0, /* src_mask */ |
| 298 | 0xfffc, /* dst_mask */ |
| 299 | FALSE), /* pcrel_offset */ |
| 300 | |
| 301 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 302 | indicate that the branch is expected to be taken. The lower two |
| 303 | bits must be zero. */ |
| 304 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 305 | 0, /* rightshift */ |
| 306 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 307 | 16, /* bitsize */ |
| 308 | FALSE, /* pc_relative */ |
| 309 | 0, /* bitpos */ |
| 310 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 311 | bfd_elf_generic_reloc, /* special_function */ |
| 312 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 313 | FALSE, /* partial_inplace */ |
| 314 | 0, /* src_mask */ |
| 315 | 0xfffc, /* dst_mask */ |
| 316 | FALSE), /* pcrel_offset */ |
| 317 | |
| 318 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 319 | indicate that the branch is not expected to be taken. The lower |
| 320 | two bits must be zero. */ |
| 321 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 322 | 0, /* rightshift */ |
| 323 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 324 | 16, /* bitsize */ |
| 325 | FALSE, /* pc_relative */ |
| 326 | 0, /* bitpos */ |
| 327 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 328 | bfd_elf_generic_reloc, /* special_function */ |
| 329 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 330 | FALSE, /* partial_inplace */ |
| 331 | 0, /* src_mask */ |
| 332 | 0xfffc, /* dst_mask */ |
| 333 | FALSE), /* pcrel_offset */ |
| 334 | |
| 335 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 336 | HOWTO (R_PPC_REL24, /* type */ |
| 337 | 0, /* rightshift */ |
| 338 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 339 | 26, /* bitsize */ |
| 340 | TRUE, /* pc_relative */ |
| 341 | 0, /* bitpos */ |
| 342 | complain_overflow_signed, /* complain_on_overflow */ |
| 343 | bfd_elf_generic_reloc, /* special_function */ |
| 344 | "R_PPC_REL24", /* name */ |
| 345 | FALSE, /* partial_inplace */ |
| 346 | 0, /* src_mask */ |
| 347 | 0x3fffffc, /* dst_mask */ |
| 348 | TRUE), /* pcrel_offset */ |
| 349 | |
| 350 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 351 | HOWTO (R_PPC_REL14, /* type */ |
| 352 | 0, /* rightshift */ |
| 353 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 354 | 16, /* bitsize */ |
| 355 | TRUE, /* pc_relative */ |
| 356 | 0, /* bitpos */ |
| 357 | complain_overflow_signed, /* complain_on_overflow */ |
| 358 | bfd_elf_generic_reloc, /* special_function */ |
| 359 | "R_PPC_REL14", /* name */ |
| 360 | FALSE, /* partial_inplace */ |
| 361 | 0, /* src_mask */ |
| 362 | 0xfffc, /* dst_mask */ |
| 363 | TRUE), /* pcrel_offset */ |
| 364 | |
| 365 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 366 | the branch is expected to be taken. The lower two bits must be |
| 367 | zero. */ |
| 368 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 369 | 0, /* rightshift */ |
| 370 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 371 | 16, /* bitsize */ |
| 372 | TRUE, /* pc_relative */ |
| 373 | 0, /* bitpos */ |
| 374 | complain_overflow_signed, /* complain_on_overflow */ |
| 375 | bfd_elf_generic_reloc, /* special_function */ |
| 376 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 377 | FALSE, /* partial_inplace */ |
| 378 | 0, /* src_mask */ |
| 379 | 0xfffc, /* dst_mask */ |
| 380 | TRUE), /* pcrel_offset */ |
| 381 | |
| 382 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 383 | the branch is not expected to be taken. The lower two bits must |
| 384 | be zero. */ |
| 385 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 386 | 0, /* rightshift */ |
| 387 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 388 | 16, /* bitsize */ |
| 389 | TRUE, /* pc_relative */ |
| 390 | 0, /* bitpos */ |
| 391 | complain_overflow_signed, /* complain_on_overflow */ |
| 392 | bfd_elf_generic_reloc, /* special_function */ |
| 393 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 394 | FALSE, /* partial_inplace */ |
| 395 | 0, /* src_mask */ |
| 396 | 0xfffc, /* dst_mask */ |
| 397 | TRUE), /* pcrel_offset */ |
| 398 | |
| 399 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 400 | symbol. */ |
| 401 | HOWTO (R_PPC_GOT16, /* type */ |
| 402 | 0, /* rightshift */ |
| 403 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 404 | 16, /* bitsize */ |
| 405 | FALSE, /* pc_relative */ |
| 406 | 0, /* bitpos */ |
| 407 | complain_overflow_signed, /* complain_on_overflow */ |
| 408 | bfd_elf_generic_reloc, /* special_function */ |
| 409 | "R_PPC_GOT16", /* name */ |
| 410 | FALSE, /* partial_inplace */ |
| 411 | 0, /* src_mask */ |
| 412 | 0xffff, /* dst_mask */ |
| 413 | FALSE), /* pcrel_offset */ |
| 414 | |
| 415 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 416 | the symbol. */ |
| 417 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 418 | 0, /* rightshift */ |
| 419 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 420 | 16, /* bitsize */ |
| 421 | FALSE, /* pc_relative */ |
| 422 | 0, /* bitpos */ |
| 423 | complain_overflow_dont, /* complain_on_overflow */ |
| 424 | bfd_elf_generic_reloc, /* special_function */ |
| 425 | "R_PPC_GOT16_LO", /* name */ |
| 426 | FALSE, /* partial_inplace */ |
| 427 | 0, /* src_mask */ |
| 428 | 0xffff, /* dst_mask */ |
| 429 | FALSE), /* pcrel_offset */ |
| 430 | |
| 431 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 432 | the symbol. */ |
| 433 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 434 | 16, /* rightshift */ |
| 435 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 436 | 16, /* bitsize */ |
| 437 | FALSE, /* pc_relative */ |
| 438 | 0, /* bitpos */ |
| 439 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 440 | bfd_elf_generic_reloc, /* special_function */ |
| 441 | "R_PPC_GOT16_HI", /* name */ |
| 442 | FALSE, /* partial_inplace */ |
| 443 | 0, /* src_mask */ |
| 444 | 0xffff, /* dst_mask */ |
| 445 | FALSE), /* pcrel_offset */ |
| 446 | |
| 447 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 448 | the symbol. */ |
| 449 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 450 | 16, /* rightshift */ |
| 451 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 452 | 16, /* bitsize */ |
| 453 | FALSE, /* pc_relative */ |
| 454 | 0, /* bitpos */ |
| 455 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 456 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 457 | "R_PPC_GOT16_HA", /* name */ |
| 458 | FALSE, /* partial_inplace */ |
| 459 | 0, /* src_mask */ |
| 460 | 0xffff, /* dst_mask */ |
| 461 | FALSE), /* pcrel_offset */ |
| 462 | |
| 463 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 464 | entry for the symbol. */ |
| 465 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 466 | 0, /* rightshift */ |
| 467 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 468 | 26, /* bitsize */ |
| 469 | TRUE, /* pc_relative */ |
| 470 | 0, /* bitpos */ |
| 471 | complain_overflow_signed, /* complain_on_overflow */ |
| 472 | bfd_elf_generic_reloc, /* special_function */ |
| 473 | "R_PPC_PLTREL24", /* name */ |
| 474 | FALSE, /* partial_inplace */ |
| 475 | 0, /* src_mask */ |
| 476 | 0x3fffffc, /* dst_mask */ |
| 477 | TRUE), /* pcrel_offset */ |
| 478 | |
| 479 | /* This is used only by the dynamic linker. The symbol should exist |
| 480 | both in the object being run and in some shared library. The |
| 481 | dynamic linker copies the data addressed by the symbol from the |
| 482 | shared library into the object, because the object being |
| 483 | run has to have the data at some particular address. */ |
| 484 | HOWTO (R_PPC_COPY, /* type */ |
| 485 | 0, /* rightshift */ |
| 486 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 487 | 32, /* bitsize */ |
| 488 | FALSE, /* pc_relative */ |
| 489 | 0, /* bitpos */ |
| 490 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 491 | bfd_elf_generic_reloc, /* special_function */ |
| 492 | "R_PPC_COPY", /* name */ |
| 493 | FALSE, /* partial_inplace */ |
| 494 | 0, /* src_mask */ |
| 495 | 0, /* dst_mask */ |
| 496 | FALSE), /* pcrel_offset */ |
| 497 | |
| 498 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 499 | entries. */ |
| 500 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 501 | 0, /* rightshift */ |
| 502 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 503 | 32, /* bitsize */ |
| 504 | FALSE, /* pc_relative */ |
| 505 | 0, /* bitpos */ |
| 506 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 507 | bfd_elf_generic_reloc, /* special_function */ |
| 508 | "R_PPC_GLOB_DAT", /* name */ |
| 509 | FALSE, /* partial_inplace */ |
| 510 | 0, /* src_mask */ |
| 511 | 0xffffffff, /* dst_mask */ |
| 512 | FALSE), /* pcrel_offset */ |
| 513 | |
| 514 | /* Marks a procedure linkage table entry for a symbol. */ |
| 515 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 516 | 0, /* rightshift */ |
| 517 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 518 | 32, /* bitsize */ |
| 519 | FALSE, /* pc_relative */ |
| 520 | 0, /* bitpos */ |
| 521 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 522 | bfd_elf_generic_reloc, /* special_function */ |
| 523 | "R_PPC_JMP_SLOT", /* name */ |
| 524 | FALSE, /* partial_inplace */ |
| 525 | 0, /* src_mask */ |
| 526 | 0, /* dst_mask */ |
| 527 | FALSE), /* pcrel_offset */ |
| 528 | |
| 529 | /* Used only by the dynamic linker. When the object is run, this |
| 530 | longword is set to the load address of the object, plus the |
| 531 | addend. */ |
| 532 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 533 | 0, /* rightshift */ |
| 534 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 535 | 32, /* bitsize */ |
| 536 | FALSE, /* pc_relative */ |
| 537 | 0, /* bitpos */ |
| 538 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 539 | bfd_elf_generic_reloc, /* special_function */ |
| 540 | "R_PPC_RELATIVE", /* name */ |
| 541 | FALSE, /* partial_inplace */ |
| 542 | 0, /* src_mask */ |
| 543 | 0xffffffff, /* dst_mask */ |
| 544 | FALSE), /* pcrel_offset */ |
| 545 | |
| 546 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 547 | object rather than the final value. Normally used for |
| 548 | _GLOBAL_OFFSET_TABLE_. */ |
| 549 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 550 | 0, /* rightshift */ |
| 551 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 552 | 26, /* bitsize */ |
| 553 | TRUE, /* pc_relative */ |
| 554 | 0, /* bitpos */ |
| 555 | complain_overflow_signed, /* complain_on_overflow */ |
| 556 | bfd_elf_generic_reloc, /* special_function */ |
| 557 | "R_PPC_LOCAL24PC", /* name */ |
| 558 | FALSE, /* partial_inplace */ |
| 559 | 0, /* src_mask */ |
| 560 | 0x3fffffc, /* dst_mask */ |
| 561 | TRUE), /* pcrel_offset */ |
| 562 | |
| 563 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 564 | HOWTO (R_PPC_UADDR32, /* type */ |
| 565 | 0, /* rightshift */ |
| 566 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 567 | 32, /* bitsize */ |
| 568 | FALSE, /* pc_relative */ |
| 569 | 0, /* bitpos */ |
| 570 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 571 | bfd_elf_generic_reloc, /* special_function */ |
| 572 | "R_PPC_UADDR32", /* name */ |
| 573 | FALSE, /* partial_inplace */ |
| 574 | 0, /* src_mask */ |
| 575 | 0xffffffff, /* dst_mask */ |
| 576 | FALSE), /* pcrel_offset */ |
| 577 | |
| 578 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 579 | HOWTO (R_PPC_UADDR16, /* type */ |
| 580 | 0, /* rightshift */ |
| 581 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 582 | 16, /* bitsize */ |
| 583 | FALSE, /* pc_relative */ |
| 584 | 0, /* bitpos */ |
| 585 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 586 | bfd_elf_generic_reloc, /* special_function */ |
| 587 | "R_PPC_UADDR16", /* name */ |
| 588 | FALSE, /* partial_inplace */ |
| 589 | 0, /* src_mask */ |
| 590 | 0xffff, /* dst_mask */ |
| 591 | FALSE), /* pcrel_offset */ |
| 592 | |
| 593 | /* 32-bit PC relative */ |
| 594 | HOWTO (R_PPC_REL32, /* type */ |
| 595 | 0, /* rightshift */ |
| 596 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 597 | 32, /* bitsize */ |
| 598 | TRUE, /* pc_relative */ |
| 599 | 0, /* bitpos */ |
| 600 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 601 | bfd_elf_generic_reloc, /* special_function */ |
| 602 | "R_PPC_REL32", /* name */ |
| 603 | FALSE, /* partial_inplace */ |
| 604 | 0, /* src_mask */ |
| 605 | 0xffffffff, /* dst_mask */ |
| 606 | TRUE), /* pcrel_offset */ |
| 607 | |
| 608 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 609 | FIXME: not supported. */ |
| 610 | HOWTO (R_PPC_PLT32, /* type */ |
| 611 | 0, /* rightshift */ |
| 612 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 613 | 32, /* bitsize */ |
| 614 | FALSE, /* pc_relative */ |
| 615 | 0, /* bitpos */ |
| 616 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 617 | bfd_elf_generic_reloc, /* special_function */ |
| 618 | "R_PPC_PLT32", /* name */ |
| 619 | FALSE, /* partial_inplace */ |
| 620 | 0, /* src_mask */ |
| 621 | 0, /* dst_mask */ |
| 622 | FALSE), /* pcrel_offset */ |
| 623 | |
| 624 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 625 | FIXME: not supported. */ |
| 626 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 627 | 0, /* rightshift */ |
| 628 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 629 | 32, /* bitsize */ |
| 630 | TRUE, /* pc_relative */ |
| 631 | 0, /* bitpos */ |
| 632 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 633 | bfd_elf_generic_reloc, /* special_function */ |
| 634 | "R_PPC_PLTREL32", /* name */ |
| 635 | FALSE, /* partial_inplace */ |
| 636 | 0, /* src_mask */ |
| 637 | 0, /* dst_mask */ |
| 638 | TRUE), /* pcrel_offset */ |
| 639 | |
| 640 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 641 | the symbol. */ |
| 642 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 643 | 0, /* rightshift */ |
| 644 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 645 | 16, /* bitsize */ |
| 646 | FALSE, /* pc_relative */ |
| 647 | 0, /* bitpos */ |
| 648 | complain_overflow_dont, /* complain_on_overflow */ |
| 649 | bfd_elf_generic_reloc, /* special_function */ |
| 650 | "R_PPC_PLT16_LO", /* name */ |
| 651 | FALSE, /* partial_inplace */ |
| 652 | 0, /* src_mask */ |
| 653 | 0xffff, /* dst_mask */ |
| 654 | FALSE), /* pcrel_offset */ |
| 655 | |
| 656 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 657 | the symbol. */ |
| 658 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 659 | 16, /* rightshift */ |
| 660 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 661 | 16, /* bitsize */ |
| 662 | FALSE, /* pc_relative */ |
| 663 | 0, /* bitpos */ |
| 664 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 665 | bfd_elf_generic_reloc, /* special_function */ |
| 666 | "R_PPC_PLT16_HI", /* name */ |
| 667 | FALSE, /* partial_inplace */ |
| 668 | 0, /* src_mask */ |
| 669 | 0xffff, /* dst_mask */ |
| 670 | FALSE), /* pcrel_offset */ |
| 671 | |
| 672 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 673 | the symbol. */ |
| 674 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 675 | 16, /* rightshift */ |
| 676 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 677 | 16, /* bitsize */ |
| 678 | FALSE, /* pc_relative */ |
| 679 | 0, /* bitpos */ |
| 680 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 681 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 682 | "R_PPC_PLT16_HA", /* name */ |
| 683 | FALSE, /* partial_inplace */ |
| 684 | 0, /* src_mask */ |
| 685 | 0xffff, /* dst_mask */ |
| 686 | FALSE), /* pcrel_offset */ |
| 687 | |
| 688 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 689 | small data items. */ |
| 690 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 691 | 0, /* rightshift */ |
| 692 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 693 | 16, /* bitsize */ |
| 694 | FALSE, /* pc_relative */ |
| 695 | 0, /* bitpos */ |
| 696 | complain_overflow_signed, /* complain_on_overflow */ |
| 697 | bfd_elf_generic_reloc, /* special_function */ |
| 698 | "R_PPC_SDAREL16", /* name */ |
| 699 | FALSE, /* partial_inplace */ |
| 700 | 0, /* src_mask */ |
| 701 | 0xffff, /* dst_mask */ |
| 702 | FALSE), /* pcrel_offset */ |
| 703 | |
| 704 | /* 16-bit section relative relocation. */ |
| 705 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 706 | 0, /* rightshift */ |
| 707 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 708 | 16, /* bitsize */ |
| 709 | FALSE, /* pc_relative */ |
| 710 | 0, /* bitpos */ |
| 711 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 712 | bfd_elf_generic_reloc, /* special_function */ |
| 713 | "R_PPC_SECTOFF", /* name */ |
| 714 | FALSE, /* partial_inplace */ |
| 715 | 0, /* src_mask */ |
| 716 | 0xffff, /* dst_mask */ |
| 717 | FALSE), /* pcrel_offset */ |
| 718 | |
| 719 | /* 16-bit lower half section relative relocation. */ |
| 720 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 721 | 0, /* rightshift */ |
| 722 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 723 | 16, /* bitsize */ |
| 724 | FALSE, /* pc_relative */ |
| 725 | 0, /* bitpos */ |
| 726 | complain_overflow_dont, /* complain_on_overflow */ |
| 727 | bfd_elf_generic_reloc, /* special_function */ |
| 728 | "R_PPC_SECTOFF_LO", /* name */ |
| 729 | FALSE, /* partial_inplace */ |
| 730 | 0, /* src_mask */ |
| 731 | 0xffff, /* dst_mask */ |
| 732 | FALSE), /* pcrel_offset */ |
| 733 | |
| 734 | /* 16-bit upper half section relative relocation. */ |
| 735 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 736 | 16, /* rightshift */ |
| 737 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 738 | 16, /* bitsize */ |
| 739 | FALSE, /* pc_relative */ |
| 740 | 0, /* bitpos */ |
| 741 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 742 | bfd_elf_generic_reloc, /* special_function */ |
| 743 | "R_PPC_SECTOFF_HI", /* name */ |
| 744 | FALSE, /* partial_inplace */ |
| 745 | 0, /* src_mask */ |
| 746 | 0xffff, /* dst_mask */ |
| 747 | FALSE), /* pcrel_offset */ |
| 748 | |
| 749 | /* 16-bit upper half adjusted section relative relocation. */ |
| 750 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 751 | 16, /* rightshift */ |
| 752 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 753 | 16, /* bitsize */ |
| 754 | FALSE, /* pc_relative */ |
| 755 | 0, /* bitpos */ |
| 756 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 757 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 758 | "R_PPC_SECTOFF_HA", /* name */ |
| 759 | FALSE, /* partial_inplace */ |
| 760 | 0, /* src_mask */ |
| 761 | 0xffff, /* dst_mask */ |
| 762 | FALSE), /* pcrel_offset */ |
| 763 | |
| 764 | /* Marker relocs for TLS. */ |
| 765 | HOWTO (R_PPC_TLS, |
| 766 | 0, /* rightshift */ |
| 767 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 768 | 32, /* bitsize */ |
| 769 | FALSE, /* pc_relative */ |
| 770 | 0, /* bitpos */ |
| 771 | complain_overflow_dont, /* complain_on_overflow */ |
| 772 | bfd_elf_generic_reloc, /* special_function */ |
| 773 | "R_PPC_TLS", /* name */ |
| 774 | FALSE, /* partial_inplace */ |
| 775 | 0, /* src_mask */ |
| 776 | 0, /* dst_mask */ |
| 777 | FALSE), /* pcrel_offset */ |
| 778 | |
| 779 | HOWTO (R_PPC_TLSGD, |
| 780 | 0, /* rightshift */ |
| 781 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 782 | 32, /* bitsize */ |
| 783 | FALSE, /* pc_relative */ |
| 784 | 0, /* bitpos */ |
| 785 | complain_overflow_dont, /* complain_on_overflow */ |
| 786 | bfd_elf_generic_reloc, /* special_function */ |
| 787 | "R_PPC_TLSGD", /* name */ |
| 788 | FALSE, /* partial_inplace */ |
| 789 | 0, /* src_mask */ |
| 790 | 0, /* dst_mask */ |
| 791 | FALSE), /* pcrel_offset */ |
| 792 | |
| 793 | HOWTO (R_PPC_TLSLD, |
| 794 | 0, /* rightshift */ |
| 795 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 796 | 32, /* bitsize */ |
| 797 | FALSE, /* pc_relative */ |
| 798 | 0, /* bitpos */ |
| 799 | complain_overflow_dont, /* complain_on_overflow */ |
| 800 | bfd_elf_generic_reloc, /* special_function */ |
| 801 | "R_PPC_TLSLD", /* name */ |
| 802 | FALSE, /* partial_inplace */ |
| 803 | 0, /* src_mask */ |
| 804 | 0, /* dst_mask */ |
| 805 | FALSE), /* pcrel_offset */ |
| 806 | |
| 807 | /* Computes the load module index of the load module that contains the |
| 808 | definition of its TLS sym. */ |
| 809 | HOWTO (R_PPC_DTPMOD32, |
| 810 | 0, /* rightshift */ |
| 811 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 812 | 32, /* bitsize */ |
| 813 | FALSE, /* pc_relative */ |
| 814 | 0, /* bitpos */ |
| 815 | complain_overflow_dont, /* complain_on_overflow */ |
| 816 | ppc_elf_unhandled_reloc, /* special_function */ |
| 817 | "R_PPC_DTPMOD32", /* name */ |
| 818 | FALSE, /* partial_inplace */ |
| 819 | 0, /* src_mask */ |
| 820 | 0xffffffff, /* dst_mask */ |
| 821 | FALSE), /* pcrel_offset */ |
| 822 | |
| 823 | /* Computes a dtv-relative displacement, the difference between the value |
| 824 | of sym+add and the base address of the thread-local storage block that |
| 825 | contains the definition of sym, minus 0x8000. */ |
| 826 | HOWTO (R_PPC_DTPREL32, |
| 827 | 0, /* rightshift */ |
| 828 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 829 | 32, /* bitsize */ |
| 830 | FALSE, /* pc_relative */ |
| 831 | 0, /* bitpos */ |
| 832 | complain_overflow_dont, /* complain_on_overflow */ |
| 833 | ppc_elf_unhandled_reloc, /* special_function */ |
| 834 | "R_PPC_DTPREL32", /* name */ |
| 835 | FALSE, /* partial_inplace */ |
| 836 | 0, /* src_mask */ |
| 837 | 0xffffffff, /* dst_mask */ |
| 838 | FALSE), /* pcrel_offset */ |
| 839 | |
| 840 | /* A 16 bit dtprel reloc. */ |
| 841 | HOWTO (R_PPC_DTPREL16, |
| 842 | 0, /* rightshift */ |
| 843 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 844 | 16, /* bitsize */ |
| 845 | FALSE, /* pc_relative */ |
| 846 | 0, /* bitpos */ |
| 847 | complain_overflow_signed, /* complain_on_overflow */ |
| 848 | ppc_elf_unhandled_reloc, /* special_function */ |
| 849 | "R_PPC_DTPREL16", /* name */ |
| 850 | FALSE, /* partial_inplace */ |
| 851 | 0, /* src_mask */ |
| 852 | 0xffff, /* dst_mask */ |
| 853 | FALSE), /* pcrel_offset */ |
| 854 | |
| 855 | /* Like DTPREL16, but no overflow. */ |
| 856 | HOWTO (R_PPC_DTPREL16_LO, |
| 857 | 0, /* rightshift */ |
| 858 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 859 | 16, /* bitsize */ |
| 860 | FALSE, /* pc_relative */ |
| 861 | 0, /* bitpos */ |
| 862 | complain_overflow_dont, /* complain_on_overflow */ |
| 863 | ppc_elf_unhandled_reloc, /* special_function */ |
| 864 | "R_PPC_DTPREL16_LO", /* name */ |
| 865 | FALSE, /* partial_inplace */ |
| 866 | 0, /* src_mask */ |
| 867 | 0xffff, /* dst_mask */ |
| 868 | FALSE), /* pcrel_offset */ |
| 869 | |
| 870 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| 871 | HOWTO (R_PPC_DTPREL16_HI, |
| 872 | 16, /* rightshift */ |
| 873 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 874 | 16, /* bitsize */ |
| 875 | FALSE, /* pc_relative */ |
| 876 | 0, /* bitpos */ |
| 877 | complain_overflow_dont, /* complain_on_overflow */ |
| 878 | ppc_elf_unhandled_reloc, /* special_function */ |
| 879 | "R_PPC_DTPREL16_HI", /* name */ |
| 880 | FALSE, /* partial_inplace */ |
| 881 | 0, /* src_mask */ |
| 882 | 0xffff, /* dst_mask */ |
| 883 | FALSE), /* pcrel_offset */ |
| 884 | |
| 885 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| 886 | HOWTO (R_PPC_DTPREL16_HA, |
| 887 | 16, /* rightshift */ |
| 888 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 889 | 16, /* bitsize */ |
| 890 | FALSE, /* pc_relative */ |
| 891 | 0, /* bitpos */ |
| 892 | complain_overflow_dont, /* complain_on_overflow */ |
| 893 | ppc_elf_unhandled_reloc, /* special_function */ |
| 894 | "R_PPC_DTPREL16_HA", /* name */ |
| 895 | FALSE, /* partial_inplace */ |
| 896 | 0, /* src_mask */ |
| 897 | 0xffff, /* dst_mask */ |
| 898 | FALSE), /* pcrel_offset */ |
| 899 | |
| 900 | /* Computes a tp-relative displacement, the difference between the value of |
| 901 | sym+add and the value of the thread pointer (r13). */ |
| 902 | HOWTO (R_PPC_TPREL32, |
| 903 | 0, /* rightshift */ |
| 904 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 905 | 32, /* bitsize */ |
| 906 | FALSE, /* pc_relative */ |
| 907 | 0, /* bitpos */ |
| 908 | complain_overflow_dont, /* complain_on_overflow */ |
| 909 | ppc_elf_unhandled_reloc, /* special_function */ |
| 910 | "R_PPC_TPREL32", /* name */ |
| 911 | FALSE, /* partial_inplace */ |
| 912 | 0, /* src_mask */ |
| 913 | 0xffffffff, /* dst_mask */ |
| 914 | FALSE), /* pcrel_offset */ |
| 915 | |
| 916 | /* A 16 bit tprel reloc. */ |
| 917 | HOWTO (R_PPC_TPREL16, |
| 918 | 0, /* rightshift */ |
| 919 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 920 | 16, /* bitsize */ |
| 921 | FALSE, /* pc_relative */ |
| 922 | 0, /* bitpos */ |
| 923 | complain_overflow_signed, /* complain_on_overflow */ |
| 924 | ppc_elf_unhandled_reloc, /* special_function */ |
| 925 | "R_PPC_TPREL16", /* name */ |
| 926 | FALSE, /* partial_inplace */ |
| 927 | 0, /* src_mask */ |
| 928 | 0xffff, /* dst_mask */ |
| 929 | FALSE), /* pcrel_offset */ |
| 930 | |
| 931 | /* Like TPREL16, but no overflow. */ |
| 932 | HOWTO (R_PPC_TPREL16_LO, |
| 933 | 0, /* rightshift */ |
| 934 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 935 | 16, /* bitsize */ |
| 936 | FALSE, /* pc_relative */ |
| 937 | 0, /* bitpos */ |
| 938 | complain_overflow_dont, /* complain_on_overflow */ |
| 939 | ppc_elf_unhandled_reloc, /* special_function */ |
| 940 | "R_PPC_TPREL16_LO", /* name */ |
| 941 | FALSE, /* partial_inplace */ |
| 942 | 0, /* src_mask */ |
| 943 | 0xffff, /* dst_mask */ |
| 944 | FALSE), /* pcrel_offset */ |
| 945 | |
| 946 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| 947 | HOWTO (R_PPC_TPREL16_HI, |
| 948 | 16, /* rightshift */ |
| 949 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 950 | 16, /* bitsize */ |
| 951 | FALSE, /* pc_relative */ |
| 952 | 0, /* bitpos */ |
| 953 | complain_overflow_dont, /* complain_on_overflow */ |
| 954 | ppc_elf_unhandled_reloc, /* special_function */ |
| 955 | "R_PPC_TPREL16_HI", /* name */ |
| 956 | FALSE, /* partial_inplace */ |
| 957 | 0, /* src_mask */ |
| 958 | 0xffff, /* dst_mask */ |
| 959 | FALSE), /* pcrel_offset */ |
| 960 | |
| 961 | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| 962 | HOWTO (R_PPC_TPREL16_HA, |
| 963 | 16, /* rightshift */ |
| 964 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 965 | 16, /* bitsize */ |
| 966 | FALSE, /* pc_relative */ |
| 967 | 0, /* bitpos */ |
| 968 | complain_overflow_dont, /* complain_on_overflow */ |
| 969 | ppc_elf_unhandled_reloc, /* special_function */ |
| 970 | "R_PPC_TPREL16_HA", /* name */ |
| 971 | FALSE, /* partial_inplace */ |
| 972 | 0, /* src_mask */ |
| 973 | 0xffff, /* dst_mask */ |
| 974 | FALSE), /* pcrel_offset */ |
| 975 | |
| 976 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 977 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| 978 | to the first entry. */ |
| 979 | HOWTO (R_PPC_GOT_TLSGD16, |
| 980 | 0, /* rightshift */ |
| 981 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 982 | 16, /* bitsize */ |
| 983 | FALSE, /* pc_relative */ |
| 984 | 0, /* bitpos */ |
| 985 | complain_overflow_signed, /* complain_on_overflow */ |
| 986 | ppc_elf_unhandled_reloc, /* special_function */ |
| 987 | "R_PPC_GOT_TLSGD16", /* name */ |
| 988 | FALSE, /* partial_inplace */ |
| 989 | 0, /* src_mask */ |
| 990 | 0xffff, /* dst_mask */ |
| 991 | FALSE), /* pcrel_offset */ |
| 992 | |
| 993 | /* Like GOT_TLSGD16, but no overflow. */ |
| 994 | HOWTO (R_PPC_GOT_TLSGD16_LO, |
| 995 | 0, /* rightshift */ |
| 996 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 997 | 16, /* bitsize */ |
| 998 | FALSE, /* pc_relative */ |
| 999 | 0, /* bitpos */ |
| 1000 | complain_overflow_dont, /* complain_on_overflow */ |
| 1001 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1002 | "R_PPC_GOT_TLSGD16_LO", /* name */ |
| 1003 | FALSE, /* partial_inplace */ |
| 1004 | 0, /* src_mask */ |
| 1005 | 0xffff, /* dst_mask */ |
| 1006 | FALSE), /* pcrel_offset */ |
| 1007 | |
| 1008 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| 1009 | HOWTO (R_PPC_GOT_TLSGD16_HI, |
| 1010 | 16, /* rightshift */ |
| 1011 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1012 | 16, /* bitsize */ |
| 1013 | FALSE, /* pc_relative */ |
| 1014 | 0, /* bitpos */ |
| 1015 | complain_overflow_dont, /* complain_on_overflow */ |
| 1016 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1017 | "R_PPC_GOT_TLSGD16_HI", /* name */ |
| 1018 | FALSE, /* partial_inplace */ |
| 1019 | 0, /* src_mask */ |
| 1020 | 0xffff, /* dst_mask */ |
| 1021 | FALSE), /* pcrel_offset */ |
| 1022 | |
| 1023 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| 1024 | HOWTO (R_PPC_GOT_TLSGD16_HA, |
| 1025 | 16, /* rightshift */ |
| 1026 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1027 | 16, /* bitsize */ |
| 1028 | FALSE, /* pc_relative */ |
| 1029 | 0, /* bitpos */ |
| 1030 | complain_overflow_dont, /* complain_on_overflow */ |
| 1031 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1032 | "R_PPC_GOT_TLSGD16_HA", /* name */ |
| 1033 | FALSE, /* partial_inplace */ |
| 1034 | 0, /* src_mask */ |
| 1035 | 0xffff, /* dst_mask */ |
| 1036 | FALSE), /* pcrel_offset */ |
| 1037 | |
| 1038 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 1039 | with values (sym+add)@dtpmod and zero, and computes the offset to the |
| 1040 | first entry. */ |
| 1041 | HOWTO (R_PPC_GOT_TLSLD16, |
| 1042 | 0, /* rightshift */ |
| 1043 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1044 | 16, /* bitsize */ |
| 1045 | FALSE, /* pc_relative */ |
| 1046 | 0, /* bitpos */ |
| 1047 | complain_overflow_signed, /* complain_on_overflow */ |
| 1048 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1049 | "R_PPC_GOT_TLSLD16", /* name */ |
| 1050 | FALSE, /* partial_inplace */ |
| 1051 | 0, /* src_mask */ |
| 1052 | 0xffff, /* dst_mask */ |
| 1053 | FALSE), /* pcrel_offset */ |
| 1054 | |
| 1055 | /* Like GOT_TLSLD16, but no overflow. */ |
| 1056 | HOWTO (R_PPC_GOT_TLSLD16_LO, |
| 1057 | 0, /* rightshift */ |
| 1058 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1059 | 16, /* bitsize */ |
| 1060 | FALSE, /* pc_relative */ |
| 1061 | 0, /* bitpos */ |
| 1062 | complain_overflow_dont, /* complain_on_overflow */ |
| 1063 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1064 | "R_PPC_GOT_TLSLD16_LO", /* name */ |
| 1065 | FALSE, /* partial_inplace */ |
| 1066 | 0, /* src_mask */ |
| 1067 | 0xffff, /* dst_mask */ |
| 1068 | FALSE), /* pcrel_offset */ |
| 1069 | |
| 1070 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| 1071 | HOWTO (R_PPC_GOT_TLSLD16_HI, |
| 1072 | 16, /* rightshift */ |
| 1073 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1074 | 16, /* bitsize */ |
| 1075 | FALSE, /* pc_relative */ |
| 1076 | 0, /* bitpos */ |
| 1077 | complain_overflow_dont, /* complain_on_overflow */ |
| 1078 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1079 | "R_PPC_GOT_TLSLD16_HI", /* name */ |
| 1080 | FALSE, /* partial_inplace */ |
| 1081 | 0, /* src_mask */ |
| 1082 | 0xffff, /* dst_mask */ |
| 1083 | FALSE), /* pcrel_offset */ |
| 1084 | |
| 1085 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| 1086 | HOWTO (R_PPC_GOT_TLSLD16_HA, |
| 1087 | 16, /* rightshift */ |
| 1088 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1089 | 16, /* bitsize */ |
| 1090 | FALSE, /* pc_relative */ |
| 1091 | 0, /* bitpos */ |
| 1092 | complain_overflow_dont, /* complain_on_overflow */ |
| 1093 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1094 | "R_PPC_GOT_TLSLD16_HA", /* name */ |
| 1095 | FALSE, /* partial_inplace */ |
| 1096 | 0, /* src_mask */ |
| 1097 | 0xffff, /* dst_mask */ |
| 1098 | FALSE), /* pcrel_offset */ |
| 1099 | |
| 1100 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| 1101 | the offset to the entry. */ |
| 1102 | HOWTO (R_PPC_GOT_DTPREL16, |
| 1103 | 0, /* rightshift */ |
| 1104 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1105 | 16, /* bitsize */ |
| 1106 | FALSE, /* pc_relative */ |
| 1107 | 0, /* bitpos */ |
| 1108 | complain_overflow_signed, /* complain_on_overflow */ |
| 1109 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1110 | "R_PPC_GOT_DTPREL16", /* name */ |
| 1111 | FALSE, /* partial_inplace */ |
| 1112 | 0, /* src_mask */ |
| 1113 | 0xffff, /* dst_mask */ |
| 1114 | FALSE), /* pcrel_offset */ |
| 1115 | |
| 1116 | /* Like GOT_DTPREL16, but no overflow. */ |
| 1117 | HOWTO (R_PPC_GOT_DTPREL16_LO, |
| 1118 | 0, /* rightshift */ |
| 1119 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1120 | 16, /* bitsize */ |
| 1121 | FALSE, /* pc_relative */ |
| 1122 | 0, /* bitpos */ |
| 1123 | complain_overflow_dont, /* complain_on_overflow */ |
| 1124 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1125 | "R_PPC_GOT_DTPREL16_LO", /* name */ |
| 1126 | FALSE, /* partial_inplace */ |
| 1127 | 0, /* src_mask */ |
| 1128 | 0xffff, /* dst_mask */ |
| 1129 | FALSE), /* pcrel_offset */ |
| 1130 | |
| 1131 | /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ |
| 1132 | HOWTO (R_PPC_GOT_DTPREL16_HI, |
| 1133 | 16, /* rightshift */ |
| 1134 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1135 | 16, /* bitsize */ |
| 1136 | FALSE, /* pc_relative */ |
| 1137 | 0, /* bitpos */ |
| 1138 | complain_overflow_dont, /* complain_on_overflow */ |
| 1139 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1140 | "R_PPC_GOT_DTPREL16_HI", /* name */ |
| 1141 | FALSE, /* partial_inplace */ |
| 1142 | 0, /* src_mask */ |
| 1143 | 0xffff, /* dst_mask */ |
| 1144 | FALSE), /* pcrel_offset */ |
| 1145 | |
| 1146 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| 1147 | HOWTO (R_PPC_GOT_DTPREL16_HA, |
| 1148 | 16, /* rightshift */ |
| 1149 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1150 | 16, /* bitsize */ |
| 1151 | FALSE, /* pc_relative */ |
| 1152 | 0, /* bitpos */ |
| 1153 | complain_overflow_dont, /* complain_on_overflow */ |
| 1154 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1155 | "R_PPC_GOT_DTPREL16_HA", /* name */ |
| 1156 | FALSE, /* partial_inplace */ |
| 1157 | 0, /* src_mask */ |
| 1158 | 0xffff, /* dst_mask */ |
| 1159 | FALSE), /* pcrel_offset */ |
| 1160 | |
| 1161 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| 1162 | offset to the entry. */ |
| 1163 | HOWTO (R_PPC_GOT_TPREL16, |
| 1164 | 0, /* rightshift */ |
| 1165 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1166 | 16, /* bitsize */ |
| 1167 | FALSE, /* pc_relative */ |
| 1168 | 0, /* bitpos */ |
| 1169 | complain_overflow_signed, /* complain_on_overflow */ |
| 1170 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1171 | "R_PPC_GOT_TPREL16", /* name */ |
| 1172 | FALSE, /* partial_inplace */ |
| 1173 | 0, /* src_mask */ |
| 1174 | 0xffff, /* dst_mask */ |
| 1175 | FALSE), /* pcrel_offset */ |
| 1176 | |
| 1177 | /* Like GOT_TPREL16, but no overflow. */ |
| 1178 | HOWTO (R_PPC_GOT_TPREL16_LO, |
| 1179 | 0, /* rightshift */ |
| 1180 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1181 | 16, /* bitsize */ |
| 1182 | FALSE, /* pc_relative */ |
| 1183 | 0, /* bitpos */ |
| 1184 | complain_overflow_dont, /* complain_on_overflow */ |
| 1185 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1186 | "R_PPC_GOT_TPREL16_LO", /* name */ |
| 1187 | FALSE, /* partial_inplace */ |
| 1188 | 0, /* src_mask */ |
| 1189 | 0xffff, /* dst_mask */ |
| 1190 | FALSE), /* pcrel_offset */ |
| 1191 | |
| 1192 | /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ |
| 1193 | HOWTO (R_PPC_GOT_TPREL16_HI, |
| 1194 | 16, /* rightshift */ |
| 1195 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1196 | 16, /* bitsize */ |
| 1197 | FALSE, /* pc_relative */ |
| 1198 | 0, /* bitpos */ |
| 1199 | complain_overflow_dont, /* complain_on_overflow */ |
| 1200 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1201 | "R_PPC_GOT_TPREL16_HI", /* name */ |
| 1202 | FALSE, /* partial_inplace */ |
| 1203 | 0, /* src_mask */ |
| 1204 | 0xffff, /* dst_mask */ |
| 1205 | FALSE), /* pcrel_offset */ |
| 1206 | |
| 1207 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| 1208 | HOWTO (R_PPC_GOT_TPREL16_HA, |
| 1209 | 16, /* rightshift */ |
| 1210 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1211 | 16, /* bitsize */ |
| 1212 | FALSE, /* pc_relative */ |
| 1213 | 0, /* bitpos */ |
| 1214 | complain_overflow_dont, /* complain_on_overflow */ |
| 1215 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1216 | "R_PPC_GOT_TPREL16_HA", /* name */ |
| 1217 | FALSE, /* partial_inplace */ |
| 1218 | 0, /* src_mask */ |
| 1219 | 0xffff, /* dst_mask */ |
| 1220 | FALSE), /* pcrel_offset */ |
| 1221 | |
| 1222 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 1223 | in the SVR4 ELF ABI. */ |
| 1224 | |
| 1225 | /* 32 bit value resulting from the addend minus the symbol. */ |
| 1226 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 1227 | 0, /* rightshift */ |
| 1228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1229 | 32, /* bitsize */ |
| 1230 | FALSE, /* pc_relative */ |
| 1231 | 0, /* bitpos */ |
| 1232 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1233 | bfd_elf_generic_reloc, /* special_function */ |
| 1234 | "R_PPC_EMB_NADDR32", /* name */ |
| 1235 | FALSE, /* partial_inplace */ |
| 1236 | 0, /* src_mask */ |
| 1237 | 0xffffffff, /* dst_mask */ |
| 1238 | FALSE), /* pcrel_offset */ |
| 1239 | |
| 1240 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1241 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 1242 | 0, /* rightshift */ |
| 1243 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1244 | 16, /* bitsize */ |
| 1245 | FALSE, /* pc_relative */ |
| 1246 | 0, /* bitpos */ |
| 1247 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1248 | bfd_elf_generic_reloc, /* special_function */ |
| 1249 | "R_PPC_EMB_NADDR16", /* name */ |
| 1250 | FALSE, /* partial_inplace */ |
| 1251 | 0, /* src_mask */ |
| 1252 | 0xffff, /* dst_mask */ |
| 1253 | FALSE), /* pcrel_offset */ |
| 1254 | |
| 1255 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1256 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 1257 | 0, /* rightshift */ |
| 1258 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1259 | 16, /* bitsize */ |
| 1260 | FALSE, /* pc_relative */ |
| 1261 | 0, /* bitpos */ |
| 1262 | complain_overflow_dont,/* complain_on_overflow */ |
| 1263 | bfd_elf_generic_reloc, /* special_function */ |
| 1264 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 1265 | FALSE, /* partial_inplace */ |
| 1266 | 0, /* src_mask */ |
| 1267 | 0xffff, /* dst_mask */ |
| 1268 | FALSE), /* pcrel_offset */ |
| 1269 | |
| 1270 | /* The high order 16 bits of the addend minus the symbol. */ |
| 1271 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 1272 | 16, /* rightshift */ |
| 1273 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1274 | 16, /* bitsize */ |
| 1275 | FALSE, /* pc_relative */ |
| 1276 | 0, /* bitpos */ |
| 1277 | complain_overflow_dont, /* complain_on_overflow */ |
| 1278 | bfd_elf_generic_reloc, /* special_function */ |
| 1279 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 1280 | FALSE, /* partial_inplace */ |
| 1281 | 0, /* src_mask */ |
| 1282 | 0xffff, /* dst_mask */ |
| 1283 | FALSE), /* pcrel_offset */ |
| 1284 | |
| 1285 | /* The high order 16 bits of the result of the addend minus the address, |
| 1286 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 1287 | is negative. */ |
| 1288 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 1289 | 16, /* rightshift */ |
| 1290 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1291 | 16, /* bitsize */ |
| 1292 | FALSE, /* pc_relative */ |
| 1293 | 0, /* bitpos */ |
| 1294 | complain_overflow_dont, /* complain_on_overflow */ |
| 1295 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1296 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 1297 | FALSE, /* partial_inplace */ |
| 1298 | 0, /* src_mask */ |
| 1299 | 0xffff, /* dst_mask */ |
| 1300 | FALSE), /* pcrel_offset */ |
| 1301 | |
| 1302 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1303 | address in the .sdata section, and returning the offset from |
| 1304 | _SDA_BASE_ for that relocation. */ |
| 1305 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 1306 | 0, /* rightshift */ |
| 1307 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1308 | 16, /* bitsize */ |
| 1309 | FALSE, /* pc_relative */ |
| 1310 | 0, /* bitpos */ |
| 1311 | complain_overflow_signed, /* complain_on_overflow */ |
| 1312 | bfd_elf_generic_reloc, /* special_function */ |
| 1313 | "R_PPC_EMB_SDAI16", /* name */ |
| 1314 | FALSE, /* partial_inplace */ |
| 1315 | 0, /* src_mask */ |
| 1316 | 0xffff, /* dst_mask */ |
| 1317 | FALSE), /* pcrel_offset */ |
| 1318 | |
| 1319 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1320 | address in the .sdata2 section, and returning the offset from |
| 1321 | _SDA2_BASE_ for that relocation. */ |
| 1322 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 1323 | 0, /* rightshift */ |
| 1324 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1325 | 16, /* bitsize */ |
| 1326 | FALSE, /* pc_relative */ |
| 1327 | 0, /* bitpos */ |
| 1328 | complain_overflow_signed, /* complain_on_overflow */ |
| 1329 | bfd_elf_generic_reloc, /* special_function */ |
| 1330 | "R_PPC_EMB_SDA2I16", /* name */ |
| 1331 | FALSE, /* partial_inplace */ |
| 1332 | 0, /* src_mask */ |
| 1333 | 0xffff, /* dst_mask */ |
| 1334 | FALSE), /* pcrel_offset */ |
| 1335 | |
| 1336 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 1337 | small data items. */ |
| 1338 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 1339 | 0, /* rightshift */ |
| 1340 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1341 | 16, /* bitsize */ |
| 1342 | FALSE, /* pc_relative */ |
| 1343 | 0, /* bitpos */ |
| 1344 | complain_overflow_signed, /* complain_on_overflow */ |
| 1345 | bfd_elf_generic_reloc, /* special_function */ |
| 1346 | "R_PPC_EMB_SDA2REL", /* name */ |
| 1347 | FALSE, /* partial_inplace */ |
| 1348 | 0, /* src_mask */ |
| 1349 | 0xffff, /* dst_mask */ |
| 1350 | FALSE), /* pcrel_offset */ |
| 1351 | |
| 1352 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 1353 | signed offset from the appropriate base, and filling in the register |
| 1354 | field with the appropriate register (0, 2, or 13). */ |
| 1355 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 1356 | 0, /* rightshift */ |
| 1357 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1358 | 16, /* bitsize */ |
| 1359 | FALSE, /* pc_relative */ |
| 1360 | 0, /* bitpos */ |
| 1361 | complain_overflow_signed, /* complain_on_overflow */ |
| 1362 | bfd_elf_generic_reloc, /* special_function */ |
| 1363 | "R_PPC_EMB_SDA21", /* name */ |
| 1364 | FALSE, /* partial_inplace */ |
| 1365 | 0, /* src_mask */ |
| 1366 | 0xffff, /* dst_mask */ |
| 1367 | FALSE), /* pcrel_offset */ |
| 1368 | |
| 1369 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 1370 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 1371 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 1372 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 1373 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 1374 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 1375 | |
| 1376 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 1377 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 1378 | register field with the appropriate register (0, 2, or 13). */ |
| 1379 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 1380 | 0, /* rightshift */ |
| 1381 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1382 | 16, /* bitsize */ |
| 1383 | FALSE, /* pc_relative */ |
| 1384 | 0, /* bitpos */ |
| 1385 | complain_overflow_signed, /* complain_on_overflow */ |
| 1386 | bfd_elf_generic_reloc, /* special_function */ |
| 1387 | "R_PPC_EMB_RELSDA", /* name */ |
| 1388 | FALSE, /* partial_inplace */ |
| 1389 | 0, /* src_mask */ |
| 1390 | 0xffff, /* dst_mask */ |
| 1391 | FALSE), /* pcrel_offset */ |
| 1392 | |
| 1393 | HOWTO (R_PPC_IRELATIVE, /* type */ |
| 1394 | 0, /* rightshift */ |
| 1395 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1396 | 32, /* bitsize */ |
| 1397 | FALSE, /* pc_relative */ |
| 1398 | 0, /* bitpos */ |
| 1399 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1400 | bfd_elf_generic_reloc, /* special_function */ |
| 1401 | "R_PPC_IRELATIVE", /* name */ |
| 1402 | FALSE, /* partial_inplace */ |
| 1403 | 0, /* src_mask */ |
| 1404 | 0xffffffff, /* dst_mask */ |
| 1405 | FALSE), /* pcrel_offset */ |
| 1406 | |
| 1407 | /* A 16 bit relative relocation. */ |
| 1408 | HOWTO (R_PPC_REL16, /* type */ |
| 1409 | 0, /* rightshift */ |
| 1410 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1411 | 16, /* bitsize */ |
| 1412 | TRUE, /* pc_relative */ |
| 1413 | 0, /* bitpos */ |
| 1414 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1415 | bfd_elf_generic_reloc, /* special_function */ |
| 1416 | "R_PPC_REL16", /* name */ |
| 1417 | FALSE, /* partial_inplace */ |
| 1418 | 0, /* src_mask */ |
| 1419 | 0xffff, /* dst_mask */ |
| 1420 | TRUE), /* pcrel_offset */ |
| 1421 | |
| 1422 | /* A 16 bit relative relocation without overflow. */ |
| 1423 | HOWTO (R_PPC_REL16_LO, /* type */ |
| 1424 | 0, /* rightshift */ |
| 1425 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1426 | 16, /* bitsize */ |
| 1427 | TRUE, /* pc_relative */ |
| 1428 | 0, /* bitpos */ |
| 1429 | complain_overflow_dont,/* complain_on_overflow */ |
| 1430 | bfd_elf_generic_reloc, /* special_function */ |
| 1431 | "R_PPC_REL16_LO", /* name */ |
| 1432 | FALSE, /* partial_inplace */ |
| 1433 | 0, /* src_mask */ |
| 1434 | 0xffff, /* dst_mask */ |
| 1435 | TRUE), /* pcrel_offset */ |
| 1436 | |
| 1437 | /* The high order 16 bits of a relative address. */ |
| 1438 | HOWTO (R_PPC_REL16_HI, /* type */ |
| 1439 | 16, /* rightshift */ |
| 1440 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1441 | 16, /* bitsize */ |
| 1442 | TRUE, /* pc_relative */ |
| 1443 | 0, /* bitpos */ |
| 1444 | complain_overflow_dont, /* complain_on_overflow */ |
| 1445 | bfd_elf_generic_reloc, /* special_function */ |
| 1446 | "R_PPC_REL16_HI", /* name */ |
| 1447 | FALSE, /* partial_inplace */ |
| 1448 | 0, /* src_mask */ |
| 1449 | 0xffff, /* dst_mask */ |
| 1450 | TRUE), /* pcrel_offset */ |
| 1451 | |
| 1452 | /* The high order 16 bits of a relative address, plus 1 if the contents of |
| 1453 | the low 16 bits, treated as a signed number, is negative. */ |
| 1454 | HOWTO (R_PPC_REL16_HA, /* type */ |
| 1455 | 16, /* rightshift */ |
| 1456 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1457 | 16, /* bitsize */ |
| 1458 | TRUE, /* pc_relative */ |
| 1459 | 0, /* bitpos */ |
| 1460 | complain_overflow_dont, /* complain_on_overflow */ |
| 1461 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1462 | "R_PPC_REL16_HA", /* name */ |
| 1463 | FALSE, /* partial_inplace */ |
| 1464 | 0, /* src_mask */ |
| 1465 | 0xffff, /* dst_mask */ |
| 1466 | TRUE), /* pcrel_offset */ |
| 1467 | |
| 1468 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1469 | HOWTO (R_PPC_GNU_VTINHERIT, /* type */ |
| 1470 | 0, /* rightshift */ |
| 1471 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1472 | 0, /* bitsize */ |
| 1473 | FALSE, /* pc_relative */ |
| 1474 | 0, /* bitpos */ |
| 1475 | complain_overflow_dont, /* complain_on_overflow */ |
| 1476 | NULL, /* special_function */ |
| 1477 | "R_PPC_GNU_VTINHERIT", /* name */ |
| 1478 | FALSE, /* partial_inplace */ |
| 1479 | 0, /* src_mask */ |
| 1480 | 0, /* dst_mask */ |
| 1481 | FALSE), /* pcrel_offset */ |
| 1482 | |
| 1483 | /* GNU extension to record C++ vtable member usage. */ |
| 1484 | HOWTO (R_PPC_GNU_VTENTRY, /* type */ |
| 1485 | 0, /* rightshift */ |
| 1486 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1487 | 0, /* bitsize */ |
| 1488 | FALSE, /* pc_relative */ |
| 1489 | 0, /* bitpos */ |
| 1490 | complain_overflow_dont, /* complain_on_overflow */ |
| 1491 | NULL, /* special_function */ |
| 1492 | "R_PPC_GNU_VTENTRY", /* name */ |
| 1493 | FALSE, /* partial_inplace */ |
| 1494 | 0, /* src_mask */ |
| 1495 | 0, /* dst_mask */ |
| 1496 | FALSE), /* pcrel_offset */ |
| 1497 | |
| 1498 | /* Phony reloc to handle AIX style TOC entries. */ |
| 1499 | HOWTO (R_PPC_TOC16, /* type */ |
| 1500 | 0, /* rightshift */ |
| 1501 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1502 | 16, /* bitsize */ |
| 1503 | FALSE, /* pc_relative */ |
| 1504 | 0, /* bitpos */ |
| 1505 | complain_overflow_signed, /* complain_on_overflow */ |
| 1506 | bfd_elf_generic_reloc, /* special_function */ |
| 1507 | "R_PPC_TOC16", /* name */ |
| 1508 | FALSE, /* partial_inplace */ |
| 1509 | 0, /* src_mask */ |
| 1510 | 0xffff, /* dst_mask */ |
| 1511 | FALSE), /* pcrel_offset */ |
| 1512 | }; |
| 1513 | \f |
| 1514 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 1515 | |
| 1516 | static void |
| 1517 | ppc_elf_howto_init (void) |
| 1518 | { |
| 1519 | unsigned int i, type; |
| 1520 | |
| 1521 | for (i = 0; |
| 1522 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 1523 | i++) |
| 1524 | { |
| 1525 | type = ppc_elf_howto_raw[i].type; |
| 1526 | if (type >= (sizeof (ppc_elf_howto_table) |
| 1527 | / sizeof (ppc_elf_howto_table[0]))) |
| 1528 | abort (); |
| 1529 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 1530 | } |
| 1531 | } |
| 1532 | |
| 1533 | static reloc_howto_type * |
| 1534 | ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1535 | bfd_reloc_code_real_type code) |
| 1536 | { |
| 1537 | enum elf_ppc_reloc_type r; |
| 1538 | |
| 1539 | /* Initialize howto table if not already done. */ |
| 1540 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1541 | ppc_elf_howto_init (); |
| 1542 | |
| 1543 | switch (code) |
| 1544 | { |
| 1545 | default: |
| 1546 | return NULL; |
| 1547 | |
| 1548 | case BFD_RELOC_NONE: r = R_PPC_NONE; break; |
| 1549 | case BFD_RELOC_32: r = R_PPC_ADDR32; break; |
| 1550 | case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; |
| 1551 | case BFD_RELOC_16: r = R_PPC_ADDR16; break; |
| 1552 | case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; |
| 1553 | case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; |
| 1554 | case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; |
| 1555 | case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; |
| 1556 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; |
| 1557 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; |
| 1558 | case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; |
| 1559 | case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; |
| 1560 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; |
| 1561 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; |
| 1562 | case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; |
| 1563 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; |
| 1564 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; |
| 1565 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; |
| 1566 | case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; |
| 1567 | case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; |
| 1568 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; |
| 1569 | case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; |
| 1570 | case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; |
| 1571 | case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; |
| 1572 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; |
| 1573 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; |
| 1574 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; |
| 1575 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; |
| 1576 | case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; |
| 1577 | case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; |
| 1578 | case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; |
| 1579 | case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; |
| 1580 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; |
| 1581 | case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; |
| 1582 | case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; |
| 1583 | case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; |
| 1584 | case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; |
| 1585 | case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; |
| 1586 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; |
| 1587 | case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; |
| 1588 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; |
| 1589 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; |
| 1590 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; |
| 1591 | case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; |
| 1592 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; |
| 1593 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; |
| 1594 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; |
| 1595 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; |
| 1596 | case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; |
| 1597 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; |
| 1598 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; |
| 1599 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; |
| 1600 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; |
| 1601 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; |
| 1602 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; |
| 1603 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; |
| 1604 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; |
| 1605 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; |
| 1606 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; |
| 1607 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; |
| 1608 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; |
| 1609 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; |
| 1610 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; |
| 1611 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; |
| 1612 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; |
| 1613 | case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; |
| 1614 | case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; |
| 1615 | case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; |
| 1616 | case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; |
| 1617 | case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; |
| 1618 | case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; |
| 1619 | case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; |
| 1620 | case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; |
| 1621 | case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; |
| 1622 | case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; |
| 1623 | case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; |
| 1624 | case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; |
| 1625 | case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; |
| 1626 | case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; |
| 1627 | case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; |
| 1628 | case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; |
| 1629 | case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; |
| 1630 | case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; |
| 1631 | case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; |
| 1632 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; |
| 1633 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; |
| 1634 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; |
| 1635 | } |
| 1636 | |
| 1637 | return ppc_elf_howto_table[r]; |
| 1638 | }; |
| 1639 | |
| 1640 | static reloc_howto_type * |
| 1641 | ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1642 | const char *r_name) |
| 1643 | { |
| 1644 | unsigned int i; |
| 1645 | |
| 1646 | for (i = 0; |
| 1647 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 1648 | i++) |
| 1649 | if (ppc_elf_howto_raw[i].name != NULL |
| 1650 | && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) |
| 1651 | return &ppc_elf_howto_raw[i]; |
| 1652 | |
| 1653 | return NULL; |
| 1654 | } |
| 1655 | |
| 1656 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1657 | |
| 1658 | static void |
| 1659 | ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 1660 | arelent *cache_ptr, |
| 1661 | Elf_Internal_Rela *dst) |
| 1662 | { |
| 1663 | /* Initialize howto table if not already done. */ |
| 1664 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1665 | ppc_elf_howto_init (); |
| 1666 | |
| 1667 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 1668 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 1669 | |
| 1670 | /* Just because the above assert didn't trigger doesn't mean that |
| 1671 | ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ |
| 1672 | if (!cache_ptr->howto) |
| 1673 | { |
| 1674 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
| 1675 | abfd, ELF32_R_TYPE (dst->r_info)); |
| 1676 | bfd_set_error (bfd_error_bad_value); |
| 1677 | |
| 1678 | cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ |
| 1683 | |
| 1684 | static bfd_reloc_status_type |
| 1685 | ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 1686 | arelent *reloc_entry, |
| 1687 | asymbol *symbol, |
| 1688 | void *data ATTRIBUTE_UNUSED, |
| 1689 | asection *input_section, |
| 1690 | bfd *output_bfd, |
| 1691 | char **error_message ATTRIBUTE_UNUSED) |
| 1692 | { |
| 1693 | bfd_vma relocation; |
| 1694 | |
| 1695 | if (output_bfd != NULL) |
| 1696 | { |
| 1697 | reloc_entry->address += input_section->output_offset; |
| 1698 | return bfd_reloc_ok; |
| 1699 | } |
| 1700 | |
| 1701 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 1702 | return bfd_reloc_outofrange; |
| 1703 | |
| 1704 | if (bfd_is_com_section (symbol->section)) |
| 1705 | relocation = 0; |
| 1706 | else |
| 1707 | relocation = symbol->value; |
| 1708 | |
| 1709 | relocation += symbol->section->output_section->vma; |
| 1710 | relocation += symbol->section->output_offset; |
| 1711 | relocation += reloc_entry->addend; |
| 1712 | if (reloc_entry->howto->pc_relative) |
| 1713 | relocation -= reloc_entry->address; |
| 1714 | |
| 1715 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 1716 | |
| 1717 | return bfd_reloc_continue; |
| 1718 | } |
| 1719 | |
| 1720 | static bfd_reloc_status_type |
| 1721 | ppc_elf_unhandled_reloc (bfd *abfd, |
| 1722 | arelent *reloc_entry, |
| 1723 | asymbol *symbol, |
| 1724 | void *data, |
| 1725 | asection *input_section, |
| 1726 | bfd *output_bfd, |
| 1727 | char **error_message) |
| 1728 | { |
| 1729 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1730 | call the generic function. Any adjustment will be done at final |
| 1731 | link time. */ |
| 1732 | if (output_bfd != NULL) |
| 1733 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1734 | input_section, output_bfd, error_message); |
| 1735 | |
| 1736 | if (error_message != NULL) |
| 1737 | { |
| 1738 | static char buf[60]; |
| 1739 | sprintf (buf, _("generic linker can't handle %s"), |
| 1740 | reloc_entry->howto->name); |
| 1741 | *error_message = buf; |
| 1742 | } |
| 1743 | return bfd_reloc_dangerous; |
| 1744 | } |
| 1745 | \f |
| 1746 | /* Sections created by the linker. */ |
| 1747 | |
| 1748 | typedef struct elf_linker_section |
| 1749 | { |
| 1750 | /* Pointer to the bfd section. */ |
| 1751 | asection *section; |
| 1752 | /* Section name. */ |
| 1753 | const char *name; |
| 1754 | /* Associated bss section name. */ |
| 1755 | const char *bss_name; |
| 1756 | /* Associated symbol name. */ |
| 1757 | const char *sym_name; |
| 1758 | /* Associated symbol. */ |
| 1759 | struct elf_link_hash_entry *sym; |
| 1760 | } elf_linker_section_t; |
| 1761 | |
| 1762 | /* Linked list of allocated pointer entries. This hangs off of the |
| 1763 | symbol lists, and provides allows us to return different pointers, |
| 1764 | based on different addend's. */ |
| 1765 | |
| 1766 | typedef struct elf_linker_section_pointers |
| 1767 | { |
| 1768 | /* next allocated pointer for this symbol */ |
| 1769 | struct elf_linker_section_pointers *next; |
| 1770 | /* offset of pointer from beginning of section */ |
| 1771 | bfd_vma offset; |
| 1772 | /* addend used */ |
| 1773 | bfd_vma addend; |
| 1774 | /* which linker section this is */ |
| 1775 | elf_linker_section_t *lsect; |
| 1776 | } elf_linker_section_pointers_t; |
| 1777 | |
| 1778 | struct ppc_elf_obj_tdata |
| 1779 | { |
| 1780 | struct elf_obj_tdata elf; |
| 1781 | |
| 1782 | /* A mapping from local symbols to offsets into the various linker |
| 1783 | sections added. This is index by the symbol index. */ |
| 1784 | elf_linker_section_pointers_t **linker_section_pointers; |
| 1785 | |
| 1786 | /* Flags used to auto-detect plt type. */ |
| 1787 | unsigned int makes_plt_call : 1; |
| 1788 | unsigned int has_rel16 : 1; |
| 1789 | }; |
| 1790 | |
| 1791 | #define ppc_elf_tdata(bfd) \ |
| 1792 | ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) |
| 1793 | |
| 1794 | #define elf_local_ptr_offsets(bfd) \ |
| 1795 | (ppc_elf_tdata (bfd)->linker_section_pointers) |
| 1796 | |
| 1797 | #define is_ppc_elf(bfd) \ |
| 1798 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 1799 | && elf_object_id (bfd) == PPC32_ELF_DATA) |
| 1800 | |
| 1801 | /* Override the generic function because we store some extras. */ |
| 1802 | |
| 1803 | static bfd_boolean |
| 1804 | ppc_elf_mkobject (bfd *abfd) |
| 1805 | { |
| 1806 | return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), |
| 1807 | PPC32_ELF_DATA); |
| 1808 | } |
| 1809 | |
| 1810 | /* Fix bad default arch selected for a 32 bit input bfd when the |
| 1811 | default is 64 bit. */ |
| 1812 | |
| 1813 | static bfd_boolean |
| 1814 | ppc_elf_object_p (bfd *abfd) |
| 1815 | { |
| 1816 | if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) |
| 1817 | { |
| 1818 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 1819 | |
| 1820 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) |
| 1821 | { |
| 1822 | /* Relies on arch after 64 bit default being 32 bit default. */ |
| 1823 | abfd->arch_info = abfd->arch_info->next; |
| 1824 | BFD_ASSERT (abfd->arch_info->bits_per_word == 32); |
| 1825 | } |
| 1826 | } |
| 1827 | return TRUE; |
| 1828 | } |
| 1829 | |
| 1830 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 1831 | |
| 1832 | static bfd_boolean |
| 1833 | ppc_elf_set_private_flags (bfd *abfd, flagword flags) |
| 1834 | { |
| 1835 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1836 | || elf_elfheader (abfd)->e_flags == flags); |
| 1837 | |
| 1838 | elf_elfheader (abfd)->e_flags = flags; |
| 1839 | elf_flags_init (abfd) = TRUE; |
| 1840 | return TRUE; |
| 1841 | } |
| 1842 | |
| 1843 | /* Support for core dump NOTE sections. */ |
| 1844 | |
| 1845 | static bfd_boolean |
| 1846 | ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1847 | { |
| 1848 | int offset; |
| 1849 | unsigned int size; |
| 1850 | |
| 1851 | switch (note->descsz) |
| 1852 | { |
| 1853 | default: |
| 1854 | return FALSE; |
| 1855 | |
| 1856 | case 268: /* Linux/PPC. */ |
| 1857 | /* pr_cursig */ |
| 1858 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1859 | |
| 1860 | /* pr_pid */ |
| 1861 | elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 1862 | |
| 1863 | /* pr_reg */ |
| 1864 | offset = 72; |
| 1865 | size = 192; |
| 1866 | |
| 1867 | break; |
| 1868 | } |
| 1869 | |
| 1870 | /* Make a ".reg/999" section. */ |
| 1871 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1872 | size, note->descpos + offset); |
| 1873 | } |
| 1874 | |
| 1875 | static bfd_boolean |
| 1876 | ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1877 | { |
| 1878 | switch (note->descsz) |
| 1879 | { |
| 1880 | default: |
| 1881 | return FALSE; |
| 1882 | |
| 1883 | case 128: /* Linux/PPC elf_prpsinfo. */ |
| 1884 | elf_tdata (abfd)->core_program |
| 1885 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 1886 | elf_tdata (abfd)->core_command |
| 1887 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 1888 | } |
| 1889 | |
| 1890 | /* Note that for some reason, a spurious space is tacked |
| 1891 | onto the end of the args in some (at least one anyway) |
| 1892 | implementations, so strip it off if it exists. */ |
| 1893 | |
| 1894 | { |
| 1895 | char *command = elf_tdata (abfd)->core_command; |
| 1896 | int n = strlen (command); |
| 1897 | |
| 1898 | if (0 < n && command[n - 1] == ' ') |
| 1899 | command[n - 1] = '\0'; |
| 1900 | } |
| 1901 | |
| 1902 | return TRUE; |
| 1903 | } |
| 1904 | |
| 1905 | static char * |
| 1906 | ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) |
| 1907 | { |
| 1908 | switch (note_type) |
| 1909 | { |
| 1910 | default: |
| 1911 | return NULL; |
| 1912 | |
| 1913 | case NT_PRPSINFO: |
| 1914 | { |
| 1915 | char data[128]; |
| 1916 | va_list ap; |
| 1917 | |
| 1918 | va_start (ap, note_type); |
| 1919 | memset (data, 0, 32); |
| 1920 | strncpy (data + 32, va_arg (ap, const char *), 16); |
| 1921 | strncpy (data + 48, va_arg (ap, const char *), 80); |
| 1922 | va_end (ap); |
| 1923 | return elfcore_write_note (abfd, buf, bufsiz, |
| 1924 | "CORE", note_type, data, sizeof (data)); |
| 1925 | } |
| 1926 | |
| 1927 | case NT_PRSTATUS: |
| 1928 | { |
| 1929 | char data[268]; |
| 1930 | va_list ap; |
| 1931 | long pid; |
| 1932 | int cursig; |
| 1933 | const void *greg; |
| 1934 | |
| 1935 | va_start (ap, note_type); |
| 1936 | memset (data, 0, 72); |
| 1937 | pid = va_arg (ap, long); |
| 1938 | bfd_put_32 (abfd, pid, data + 24); |
| 1939 | cursig = va_arg (ap, int); |
| 1940 | bfd_put_16 (abfd, cursig, data + 12); |
| 1941 | greg = va_arg (ap, const void *); |
| 1942 | memcpy (data + 72, greg, 192); |
| 1943 | memset (data + 264, 0, 4); |
| 1944 | va_end (ap); |
| 1945 | return elfcore_write_note (abfd, buf, bufsiz, |
| 1946 | "CORE", note_type, data, sizeof (data)); |
| 1947 | } |
| 1948 | } |
| 1949 | } |
| 1950 | |
| 1951 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 1952 | or (bfd_vma) -1 if it should not be included. */ |
| 1953 | |
| 1954 | static bfd_vma |
| 1955 | ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, |
| 1956 | const asection *plt ATTRIBUTE_UNUSED, |
| 1957 | const arelent *rel) |
| 1958 | { |
| 1959 | return rel->address; |
| 1960 | } |
| 1961 | |
| 1962 | /* Handle a PowerPC specific section when reading an object file. This |
| 1963 | is called when bfd_section_from_shdr finds a section with an unknown |
| 1964 | type. */ |
| 1965 | |
| 1966 | static bfd_boolean |
| 1967 | ppc_elf_section_from_shdr (bfd *abfd, |
| 1968 | Elf_Internal_Shdr *hdr, |
| 1969 | const char *name, |
| 1970 | int shindex) |
| 1971 | { |
| 1972 | asection *newsect; |
| 1973 | flagword flags; |
| 1974 | |
| 1975 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 1976 | return FALSE; |
| 1977 | |
| 1978 | newsect = hdr->bfd_section; |
| 1979 | flags = bfd_get_section_flags (abfd, newsect); |
| 1980 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 1981 | flags |= SEC_EXCLUDE; |
| 1982 | |
| 1983 | if (hdr->sh_type == SHT_ORDERED) |
| 1984 | flags |= SEC_SORT_ENTRIES; |
| 1985 | |
| 1986 | bfd_set_section_flags (abfd, newsect, flags); |
| 1987 | return TRUE; |
| 1988 | } |
| 1989 | |
| 1990 | /* Set up any other section flags and such that may be necessary. */ |
| 1991 | |
| 1992 | static bfd_boolean |
| 1993 | ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 1994 | Elf_Internal_Shdr *shdr, |
| 1995 | asection *asect) |
| 1996 | { |
| 1997 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 1998 | shdr->sh_type = SHT_ORDERED; |
| 1999 | |
| 2000 | return TRUE; |
| 2001 | } |
| 2002 | |
| 2003 | /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we |
| 2004 | need to bump up the number of section headers. */ |
| 2005 | |
| 2006 | static int |
| 2007 | ppc_elf_additional_program_headers (bfd *abfd, |
| 2008 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 2009 | { |
| 2010 | asection *s; |
| 2011 | int ret = 0; |
| 2012 | |
| 2013 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 2014 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 2015 | ++ret; |
| 2016 | |
| 2017 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 2018 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 2019 | ++ret; |
| 2020 | |
| 2021 | return ret; |
| 2022 | } |
| 2023 | |
| 2024 | /* Add extra PPC sections -- Note, for now, make .sbss2 and |
| 2025 | .PPC.EMB.sbss0 a normal section, and not a bss section so |
| 2026 | that the linker doesn't crater when trying to make more than |
| 2027 | 2 sections. */ |
| 2028 | |
| 2029 | static const struct bfd_elf_special_section ppc_elf_special_sections[] = |
| 2030 | { |
| 2031 | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, |
| 2032 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 2033 | { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, |
| 2034 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 2035 | { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, |
| 2036 | { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, |
| 2037 | { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 }, |
| 2038 | { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 2039 | { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 2040 | { NULL, 0, 0, 0, 0 } |
| 2041 | }; |
| 2042 | |
| 2043 | /* This is what we want for new plt/got. */ |
| 2044 | static struct bfd_elf_special_section ppc_alt_plt = |
| 2045 | { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; |
| 2046 | |
| 2047 | static const struct bfd_elf_special_section * |
| 2048 | ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 2049 | { |
| 2050 | const struct bfd_elf_special_section *ssect; |
| 2051 | |
| 2052 | /* See if this is one of the special sections. */ |
| 2053 | if (sec->name == NULL) |
| 2054 | return NULL; |
| 2055 | |
| 2056 | ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, |
| 2057 | sec->use_rela_p); |
| 2058 | if (ssect != NULL) |
| 2059 | { |
| 2060 | if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) |
| 2061 | ssect = &ppc_alt_plt; |
| 2062 | return ssect; |
| 2063 | } |
| 2064 | |
| 2065 | return _bfd_elf_get_sec_type_attr (abfd, sec); |
| 2066 | } |
| 2067 | \f |
| 2068 | /* Very simple linked list structure for recording apuinfo values. */ |
| 2069 | typedef struct apuinfo_list |
| 2070 | { |
| 2071 | struct apuinfo_list *next; |
| 2072 | unsigned long value; |
| 2073 | } |
| 2074 | apuinfo_list; |
| 2075 | |
| 2076 | static apuinfo_list *head; |
| 2077 | static bfd_boolean apuinfo_set; |
| 2078 | |
| 2079 | static void |
| 2080 | apuinfo_list_init (void) |
| 2081 | { |
| 2082 | head = NULL; |
| 2083 | apuinfo_set = FALSE; |
| 2084 | } |
| 2085 | |
| 2086 | static void |
| 2087 | apuinfo_list_add (unsigned long value) |
| 2088 | { |
| 2089 | apuinfo_list *entry = head; |
| 2090 | |
| 2091 | while (entry != NULL) |
| 2092 | { |
| 2093 | if (entry->value == value) |
| 2094 | return; |
| 2095 | entry = entry->next; |
| 2096 | } |
| 2097 | |
| 2098 | entry = bfd_malloc (sizeof (* entry)); |
| 2099 | if (entry == NULL) |
| 2100 | return; |
| 2101 | |
| 2102 | entry->value = value; |
| 2103 | entry->next = head; |
| 2104 | head = entry; |
| 2105 | } |
| 2106 | |
| 2107 | static unsigned |
| 2108 | apuinfo_list_length (void) |
| 2109 | { |
| 2110 | apuinfo_list *entry; |
| 2111 | unsigned long count; |
| 2112 | |
| 2113 | for (entry = head, count = 0; |
| 2114 | entry; |
| 2115 | entry = entry->next) |
| 2116 | ++ count; |
| 2117 | |
| 2118 | return count; |
| 2119 | } |
| 2120 | |
| 2121 | static inline unsigned long |
| 2122 | apuinfo_list_element (unsigned long number) |
| 2123 | { |
| 2124 | apuinfo_list * entry; |
| 2125 | |
| 2126 | for (entry = head; |
| 2127 | entry && number --; |
| 2128 | entry = entry->next) |
| 2129 | ; |
| 2130 | |
| 2131 | return entry ? entry->value : 0; |
| 2132 | } |
| 2133 | |
| 2134 | static void |
| 2135 | apuinfo_list_finish (void) |
| 2136 | { |
| 2137 | apuinfo_list *entry; |
| 2138 | |
| 2139 | for (entry = head; entry;) |
| 2140 | { |
| 2141 | apuinfo_list *next = entry->next; |
| 2142 | free (entry); |
| 2143 | entry = next; |
| 2144 | } |
| 2145 | |
| 2146 | head = NULL; |
| 2147 | } |
| 2148 | |
| 2149 | #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" |
| 2150 | #define APUINFO_LABEL "APUinfo" |
| 2151 | |
| 2152 | /* Scan the input BFDs and create a linked list of |
| 2153 | the APUinfo values that will need to be emitted. */ |
| 2154 | |
| 2155 | static void |
| 2156 | ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) |
| 2157 | { |
| 2158 | bfd *ibfd; |
| 2159 | asection *asec; |
| 2160 | char *buffer = NULL; |
| 2161 | bfd_size_type largest_input_size = 0; |
| 2162 | unsigned i; |
| 2163 | unsigned long length; |
| 2164 | const char *error_message = NULL; |
| 2165 | |
| 2166 | if (link_info == NULL) |
| 2167 | return; |
| 2168 | |
| 2169 | apuinfo_list_init (); |
| 2170 | |
| 2171 | /* Read in the input sections contents. */ |
| 2172 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 2173 | { |
| 2174 | unsigned long datum; |
| 2175 | |
| 2176 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 2177 | if (asec == NULL) |
| 2178 | continue; |
| 2179 | |
| 2180 | error_message = _("corrupt %s section in %B"); |
| 2181 | length = asec->size; |
| 2182 | if (length < 20) |
| 2183 | goto fail; |
| 2184 | |
| 2185 | apuinfo_set = TRUE; |
| 2186 | if (largest_input_size < asec->size) |
| 2187 | { |
| 2188 | if (buffer) |
| 2189 | free (buffer); |
| 2190 | largest_input_size = asec->size; |
| 2191 | buffer = bfd_malloc (largest_input_size); |
| 2192 | if (!buffer) |
| 2193 | return; |
| 2194 | } |
| 2195 | |
| 2196 | if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 |
| 2197 | || (bfd_bread (buffer, length, ibfd) != length)) |
| 2198 | { |
| 2199 | error_message = _("unable to read in %s section from %B"); |
| 2200 | goto fail; |
| 2201 | } |
| 2202 | |
| 2203 | /* Verify the contents of the header. Note - we have to |
| 2204 | extract the values this way in order to allow for a |
| 2205 | host whose endian-ness is different from the target. */ |
| 2206 | datum = bfd_get_32 (ibfd, buffer); |
| 2207 | if (datum != sizeof APUINFO_LABEL) |
| 2208 | goto fail; |
| 2209 | |
| 2210 | datum = bfd_get_32 (ibfd, buffer + 8); |
| 2211 | if (datum != 0x2) |
| 2212 | goto fail; |
| 2213 | |
| 2214 | if (strcmp (buffer + 12, APUINFO_LABEL) != 0) |
| 2215 | goto fail; |
| 2216 | |
| 2217 | /* Get the number of bytes used for apuinfo entries. */ |
| 2218 | datum = bfd_get_32 (ibfd, buffer + 4); |
| 2219 | if (datum + 20 != length) |
| 2220 | goto fail; |
| 2221 | |
| 2222 | /* Scan the apuinfo section, building a list of apuinfo numbers. */ |
| 2223 | for (i = 0; i < datum; i += 4) |
| 2224 | apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); |
| 2225 | } |
| 2226 | |
| 2227 | error_message = NULL; |
| 2228 | |
| 2229 | if (apuinfo_set) |
| 2230 | { |
| 2231 | /* Compute the size of the output section. */ |
| 2232 | unsigned num_entries = apuinfo_list_length (); |
| 2233 | |
| 2234 | /* Set the output section size, if it exists. */ |
| 2235 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 2236 | |
| 2237 | if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) |
| 2238 | { |
| 2239 | ibfd = abfd; |
| 2240 | error_message = _("warning: unable to set size of %s section in %B"); |
| 2241 | } |
| 2242 | } |
| 2243 | |
| 2244 | fail: |
| 2245 | if (buffer) |
| 2246 | free (buffer); |
| 2247 | |
| 2248 | if (error_message) |
| 2249 | (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); |
| 2250 | } |
| 2251 | |
| 2252 | /* Prevent the output section from accumulating the input sections' |
| 2253 | contents. We have already stored this in our linked list structure. */ |
| 2254 | |
| 2255 | static bfd_boolean |
| 2256 | ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, |
| 2257 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
| 2258 | asection *asec, |
| 2259 | bfd_byte *contents ATTRIBUTE_UNUSED) |
| 2260 | { |
| 2261 | return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; |
| 2262 | } |
| 2263 | |
| 2264 | /* Finally we can generate the output section. */ |
| 2265 | |
| 2266 | static void |
| 2267 | ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 2268 | { |
| 2269 | bfd_byte *buffer; |
| 2270 | asection *asec; |
| 2271 | unsigned i; |
| 2272 | unsigned num_entries; |
| 2273 | bfd_size_type length; |
| 2274 | |
| 2275 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 2276 | if (asec == NULL) |
| 2277 | return; |
| 2278 | |
| 2279 | if (!apuinfo_set) |
| 2280 | return; |
| 2281 | |
| 2282 | length = asec->size; |
| 2283 | if (length < 20) |
| 2284 | return; |
| 2285 | |
| 2286 | buffer = bfd_malloc (length); |
| 2287 | if (buffer == NULL) |
| 2288 | { |
| 2289 | (*_bfd_error_handler) |
| 2290 | (_("failed to allocate space for new APUinfo section.")); |
| 2291 | return; |
| 2292 | } |
| 2293 | |
| 2294 | /* Create the apuinfo header. */ |
| 2295 | num_entries = apuinfo_list_length (); |
| 2296 | bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); |
| 2297 | bfd_put_32 (abfd, num_entries * 4, buffer + 4); |
| 2298 | bfd_put_32 (abfd, 0x2, buffer + 8); |
| 2299 | strcpy ((char *) buffer + 12, APUINFO_LABEL); |
| 2300 | |
| 2301 | length = 20; |
| 2302 | for (i = 0; i < num_entries; i++) |
| 2303 | { |
| 2304 | bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); |
| 2305 | length += 4; |
| 2306 | } |
| 2307 | |
| 2308 | if (length != asec->size) |
| 2309 | (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); |
| 2310 | |
| 2311 | if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) |
| 2312 | (*_bfd_error_handler) (_("failed to install new APUinfo section.")); |
| 2313 | |
| 2314 | free (buffer); |
| 2315 | |
| 2316 | apuinfo_list_finish (); |
| 2317 | } |
| 2318 | \f |
| 2319 | static bfd_boolean |
| 2320 | is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) |
| 2321 | { |
| 2322 | bfd_byte buf[GLINK_ENTRY_SIZE]; |
| 2323 | |
| 2324 | if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) |
| 2325 | return FALSE; |
| 2326 | |
| 2327 | return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 |
| 2328 | && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 |
| 2329 | && bfd_get_32 (abfd, buf + 8) == MTCTR_11 |
| 2330 | && bfd_get_32 (abfd, buf + 12) == BCTR); |
| 2331 | } |
| 2332 | |
| 2333 | static bfd_boolean |
| 2334 | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) |
| 2335 | { |
| 2336 | bfd_vma vma = *(bfd_vma *) ptr; |
| 2337 | return ((section->flags & SEC_ALLOC) != 0 |
| 2338 | && section->vma <= vma |
| 2339 | && vma < section->vma + section->size); |
| 2340 | } |
| 2341 | |
| 2342 | static long |
| 2343 | ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, |
| 2344 | long dynsymcount, asymbol **dynsyms, |
| 2345 | asymbol **ret) |
| 2346 | { |
| 2347 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| 2348 | asection *plt, *relplt, *dynamic, *glink; |
| 2349 | bfd_vma glink_vma = 0; |
| 2350 | bfd_vma resolv_vma = 0; |
| 2351 | bfd_vma stub_vma; |
| 2352 | asymbol *s; |
| 2353 | arelent *p; |
| 2354 | long count, i; |
| 2355 | size_t size; |
| 2356 | char *names; |
| 2357 | bfd_byte buf[4]; |
| 2358 | |
| 2359 | *ret = NULL; |
| 2360 | |
| 2361 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
| 2362 | return 0; |
| 2363 | |
| 2364 | if (dynsymcount <= 0) |
| 2365 | return 0; |
| 2366 | |
| 2367 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2368 | if (relplt == NULL) |
| 2369 | return 0; |
| 2370 | |
| 2371 | plt = bfd_get_section_by_name (abfd, ".plt"); |
| 2372 | if (plt == NULL) |
| 2373 | return 0; |
| 2374 | |
| 2375 | /* Call common code to handle old-style executable PLTs. */ |
| 2376 | if (elf_section_flags (plt) & SHF_EXECINSTR) |
| 2377 | return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, |
| 2378 | dynsymcount, dynsyms, ret); |
| 2379 | |
| 2380 | /* If this object was prelinked, the prelinker stored the address |
| 2381 | of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ |
| 2382 | dynamic = bfd_get_section_by_name (abfd, ".dynamic"); |
| 2383 | if (dynamic != NULL) |
| 2384 | { |
| 2385 | bfd_byte *dynbuf, *extdyn, *extdynend; |
| 2386 | size_t extdynsize; |
| 2387 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); |
| 2388 | |
| 2389 | if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) |
| 2390 | return -1; |
| 2391 | |
| 2392 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
| 2393 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
| 2394 | |
| 2395 | extdyn = dynbuf; |
| 2396 | extdynend = extdyn + dynamic->size; |
| 2397 | for (; extdyn < extdynend; extdyn += extdynsize) |
| 2398 | { |
| 2399 | Elf_Internal_Dyn dyn; |
| 2400 | (*swap_dyn_in) (abfd, extdyn, &dyn); |
| 2401 | |
| 2402 | if (dyn.d_tag == DT_NULL) |
| 2403 | break; |
| 2404 | |
| 2405 | if (dyn.d_tag == DT_PPC_GOT) |
| 2406 | { |
| 2407 | unsigned int g_o_t = dyn.d_un.d_val; |
| 2408 | asection *got = bfd_get_section_by_name (abfd, ".got"); |
| 2409 | if (got != NULL |
| 2410 | && bfd_get_section_contents (abfd, got, buf, |
| 2411 | g_o_t - got->vma + 4, 4)) |
| 2412 | glink_vma = bfd_get_32 (abfd, buf); |
| 2413 | break; |
| 2414 | } |
| 2415 | } |
| 2416 | free (dynbuf); |
| 2417 | } |
| 2418 | |
| 2419 | /* Otherwise we read the first plt entry. */ |
| 2420 | if (glink_vma == 0) |
| 2421 | { |
| 2422 | if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) |
| 2423 | glink_vma = bfd_get_32 (abfd, buf); |
| 2424 | } |
| 2425 | |
| 2426 | if (glink_vma == 0) |
| 2427 | return 0; |
| 2428 | |
| 2429 | /* The .glink section usually does not survive the final |
| 2430 | link; search for the section (usually .text) where the |
| 2431 | glink stubs now reside. */ |
| 2432 | glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); |
| 2433 | if (glink == NULL) |
| 2434 | return 0; |
| 2435 | |
| 2436 | /* Determine glink PLT resolver by reading the relative branch |
| 2437 | from the first glink stub. */ |
| 2438 | if (bfd_get_section_contents (abfd, glink, buf, |
| 2439 | glink_vma - glink->vma, 4)) |
| 2440 | { |
| 2441 | unsigned int insn = bfd_get_32 (abfd, buf); |
| 2442 | |
| 2443 | /* The first glink stub may either branch to the resolver ... */ |
| 2444 | insn ^= B; |
| 2445 | if ((insn & ~0x3fffffc) == 0) |
| 2446 | resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; |
| 2447 | |
| 2448 | /* ... or fall through a bunch of NOPs. */ |
| 2449 | else if ((insn ^ B ^ NOP) == 0) |
| 2450 | for (i = 4; |
| 2451 | bfd_get_section_contents (abfd, glink, buf, |
| 2452 | glink_vma - glink->vma + i, 4); |
| 2453 | i += 4) |
| 2454 | if (bfd_get_32 (abfd, buf) != NOP) |
| 2455 | { |
| 2456 | resolv_vma = glink_vma + i; |
| 2457 | break; |
| 2458 | } |
| 2459 | } |
| 2460 | |
| 2461 | count = relplt->size / sizeof (Elf32_External_Rela); |
| 2462 | stub_vma = glink_vma - (bfd_vma) count * 16; |
| 2463 | /* If the stubs are those for -shared/-pie then we might have |
| 2464 | multiple stubs for each plt entry. If that is the case then |
| 2465 | there is no way to associate stubs with their plt entries short |
| 2466 | of figuring out the GOT pointer value used in the stub. */ |
| 2467 | if (!is_nonpic_glink_stub (abfd, glink, |
| 2468 | glink_vma - GLINK_ENTRY_SIZE - glink->vma)) |
| 2469 | return 0; |
| 2470 | |
| 2471 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| 2472 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) |
| 2473 | return -1; |
| 2474 | |
| 2475 | size = count * sizeof (asymbol); |
| 2476 | p = relplt->relocation; |
| 2477 | for (i = 0; i < count; i++, p++) |
| 2478 | { |
| 2479 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); |
| 2480 | if (p->addend != 0) |
| 2481 | size += sizeof ("+0x") - 1 + 8; |
| 2482 | } |
| 2483 | |
| 2484 | size += sizeof (asymbol) + sizeof ("__glink"); |
| 2485 | |
| 2486 | if (resolv_vma) |
| 2487 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); |
| 2488 | |
| 2489 | s = *ret = bfd_malloc (size); |
| 2490 | if (s == NULL) |
| 2491 | return -1; |
| 2492 | |
| 2493 | names = (char *) (s + count + 1 + (resolv_vma != 0)); |
| 2494 | p = relplt->relocation; |
| 2495 | for (i = 0; i < count; i++, p++) |
| 2496 | { |
| 2497 | size_t len; |
| 2498 | |
| 2499 | *s = **p->sym_ptr_ptr; |
| 2500 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since |
| 2501 | we are defining a symbol, ensure one of them is set. */ |
| 2502 | if ((s->flags & BSF_LOCAL) == 0) |
| 2503 | s->flags |= BSF_GLOBAL; |
| 2504 | s->flags |= BSF_SYNTHETIC; |
| 2505 | s->section = glink; |
| 2506 | s->value = stub_vma - glink->vma; |
| 2507 | s->name = names; |
| 2508 | s->udata.p = NULL; |
| 2509 | len = strlen ((*p->sym_ptr_ptr)->name); |
| 2510 | memcpy (names, (*p->sym_ptr_ptr)->name, len); |
| 2511 | names += len; |
| 2512 | if (p->addend != 0) |
| 2513 | { |
| 2514 | memcpy (names, "+0x", sizeof ("+0x") - 1); |
| 2515 | names += sizeof ("+0x") - 1; |
| 2516 | bfd_sprintf_vma (abfd, names, p->addend); |
| 2517 | names += strlen (names); |
| 2518 | } |
| 2519 | memcpy (names, "@plt", sizeof ("@plt")); |
| 2520 | names += sizeof ("@plt"); |
| 2521 | ++s; |
| 2522 | stub_vma += 16; |
| 2523 | } |
| 2524 | |
| 2525 | /* Add a symbol at the start of the glink branch table. */ |
| 2526 | memset (s, 0, sizeof *s); |
| 2527 | s->the_bfd = abfd; |
| 2528 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 2529 | s->section = glink; |
| 2530 | s->value = glink_vma - glink->vma; |
| 2531 | s->name = names; |
| 2532 | memcpy (names, "__glink", sizeof ("__glink")); |
| 2533 | names += sizeof ("__glink"); |
| 2534 | s++; |
| 2535 | count++; |
| 2536 | |
| 2537 | if (resolv_vma) |
| 2538 | { |
| 2539 | /* Add a symbol for the glink PLT resolver. */ |
| 2540 | memset (s, 0, sizeof *s); |
| 2541 | s->the_bfd = abfd; |
| 2542 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 2543 | s->section = glink; |
| 2544 | s->value = resolv_vma - glink->vma; |
| 2545 | s->name = names; |
| 2546 | memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); |
| 2547 | names += sizeof ("__glink_PLTresolve"); |
| 2548 | s++; |
| 2549 | count++; |
| 2550 | } |
| 2551 | |
| 2552 | return count; |
| 2553 | } |
| 2554 | \f |
| 2555 | /* The following functions are specific to the ELF linker, while |
| 2556 | functions above are used generally. They appear in this file more |
| 2557 | or less in the order in which they are called. eg. |
| 2558 | ppc_elf_check_relocs is called early in the link process, |
| 2559 | ppc_elf_finish_dynamic_sections is one of the last functions |
| 2560 | called. */ |
| 2561 | |
| 2562 | /* The PPC linker needs to keep track of the number of relocs that it |
| 2563 | decides to copy as dynamic relocs in check_relocs for each symbol. |
| 2564 | This is so that it can later discard them if they are found to be |
| 2565 | unnecessary. We store the information in a field extending the |
| 2566 | regular ELF linker hash table. */ |
| 2567 | |
| 2568 | struct ppc_elf_dyn_relocs |
| 2569 | { |
| 2570 | struct ppc_elf_dyn_relocs *next; |
| 2571 | |
| 2572 | /* The input section of the reloc. */ |
| 2573 | asection *sec; |
| 2574 | |
| 2575 | /* Total number of relocs copied for the input section. */ |
| 2576 | bfd_size_type count; |
| 2577 | |
| 2578 | /* Number of pc-relative relocs copied for the input section. */ |
| 2579 | bfd_size_type pc_count; |
| 2580 | }; |
| 2581 | |
| 2582 | /* Track PLT entries needed for a given symbol. We might need more |
| 2583 | than one glink entry per symbol when generating a pic binary. */ |
| 2584 | struct plt_entry |
| 2585 | { |
| 2586 | struct plt_entry *next; |
| 2587 | |
| 2588 | /* -fPIC uses multiple GOT sections, one per file, called ".got2". |
| 2589 | This field stores the offset into .got2 used to initialise the |
| 2590 | GOT pointer reg. It will always be at least 32768. (Current |
| 2591 | gcc always uses an offset of 32768, but ld -r will pack .got2 |
| 2592 | sections together resulting in larger offsets). */ |
| 2593 | bfd_vma addend; |
| 2594 | |
| 2595 | /* The .got2 section. */ |
| 2596 | asection *sec; |
| 2597 | |
| 2598 | /* PLT refcount or offset. */ |
| 2599 | union |
| 2600 | { |
| 2601 | bfd_signed_vma refcount; |
| 2602 | bfd_vma offset; |
| 2603 | } plt; |
| 2604 | |
| 2605 | /* .glink stub offset. */ |
| 2606 | bfd_vma glink_offset; |
| 2607 | }; |
| 2608 | |
| 2609 | /* Of those relocs that might be copied as dynamic relocs, this function |
| 2610 | selects those that must be copied when linking a shared library, |
| 2611 | even when the symbol is local. */ |
| 2612 | |
| 2613 | static int |
| 2614 | must_be_dyn_reloc (struct bfd_link_info *info, |
| 2615 | enum elf_ppc_reloc_type r_type) |
| 2616 | { |
| 2617 | switch (r_type) |
| 2618 | { |
| 2619 | default: |
| 2620 | return 1; |
| 2621 | |
| 2622 | case R_PPC_REL24: |
| 2623 | case R_PPC_REL14: |
| 2624 | case R_PPC_REL14_BRTAKEN: |
| 2625 | case R_PPC_REL14_BRNTAKEN: |
| 2626 | case R_PPC_REL32: |
| 2627 | return 0; |
| 2628 | |
| 2629 | case R_PPC_TPREL32: |
| 2630 | case R_PPC_TPREL16: |
| 2631 | case R_PPC_TPREL16_LO: |
| 2632 | case R_PPC_TPREL16_HI: |
| 2633 | case R_PPC_TPREL16_HA: |
| 2634 | return !info->executable; |
| 2635 | } |
| 2636 | } |
| 2637 | |
| 2638 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 2639 | copying dynamic variables from a shared lib into an app's dynbss |
| 2640 | section, and instead use a dynamic relocation to point into the |
| 2641 | shared lib. */ |
| 2642 | #define ELIMINATE_COPY_RELOCS 1 |
| 2643 | |
| 2644 | /* PPC ELF linker hash entry. */ |
| 2645 | |
| 2646 | struct ppc_elf_link_hash_entry |
| 2647 | { |
| 2648 | struct elf_link_hash_entry elf; |
| 2649 | |
| 2650 | /* If this symbol is used in the linker created sections, the processor |
| 2651 | specific backend uses this field to map the field into the offset |
| 2652 | from the beginning of the section. */ |
| 2653 | elf_linker_section_pointers_t *linker_section_pointer; |
| 2654 | |
| 2655 | /* Track dynamic relocs copied for this symbol. */ |
| 2656 | struct ppc_elf_dyn_relocs *dyn_relocs; |
| 2657 | |
| 2658 | /* Contexts in which symbol is used in the GOT (or TOC). |
| 2659 | TLS_GD .. TLS_TLS bits are or'd into the mask as the |
| 2660 | corresponding relocs are encountered during check_relocs. |
| 2661 | tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| 2662 | indicate the corresponding GOT entry type is not needed. */ |
| 2663 | #define TLS_GD 1 /* GD reloc. */ |
| 2664 | #define TLS_LD 2 /* LD reloc. */ |
| 2665 | #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| 2666 | #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| 2667 | #define TLS_TLS 16 /* Any TLS reloc. */ |
| 2668 | #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ |
| 2669 | #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ |
| 2670 | char tls_mask; |
| 2671 | |
| 2672 | /* Nonzero if we have seen a small data relocation referring to this |
| 2673 | symbol. */ |
| 2674 | unsigned char has_sda_refs; |
| 2675 | }; |
| 2676 | |
| 2677 | #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) |
| 2678 | |
| 2679 | /* PPC ELF linker hash table. */ |
| 2680 | |
| 2681 | struct ppc_elf_link_hash_table |
| 2682 | { |
| 2683 | struct elf_link_hash_table elf; |
| 2684 | |
| 2685 | /* Short-cuts to get to dynamic linker sections. */ |
| 2686 | asection *got; |
| 2687 | asection *relgot; |
| 2688 | asection *glink; |
| 2689 | asection *plt; |
| 2690 | asection *relplt; |
| 2691 | asection *iplt; |
| 2692 | asection *reliplt; |
| 2693 | asection *dynbss; |
| 2694 | asection *relbss; |
| 2695 | asection *dynsbss; |
| 2696 | asection *relsbss; |
| 2697 | elf_linker_section_t sdata[2]; |
| 2698 | asection *sbss; |
| 2699 | |
| 2700 | /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ |
| 2701 | asection *srelplt2; |
| 2702 | |
| 2703 | /* The .got.plt section (VxWorks only)*/ |
| 2704 | asection *sgotplt; |
| 2705 | |
| 2706 | /* Shortcut to __tls_get_addr. */ |
| 2707 | struct elf_link_hash_entry *tls_get_addr; |
| 2708 | |
| 2709 | /* The bfd that forced an old-style PLT. */ |
| 2710 | bfd *old_bfd; |
| 2711 | |
| 2712 | /* TLS local dynamic got entry handling. */ |
| 2713 | union { |
| 2714 | bfd_signed_vma refcount; |
| 2715 | bfd_vma offset; |
| 2716 | } tlsld_got; |
| 2717 | |
| 2718 | /* Offset of branch table to PltResolve function in glink. */ |
| 2719 | bfd_vma glink_pltresolve; |
| 2720 | |
| 2721 | /* Size of reserved GOT entries. */ |
| 2722 | unsigned int got_header_size; |
| 2723 | /* Non-zero if allocating the header left a gap. */ |
| 2724 | unsigned int got_gap; |
| 2725 | |
| 2726 | /* The type of PLT we have chosen to use. */ |
| 2727 | enum ppc_elf_plt_type plt_type; |
| 2728 | |
| 2729 | /* Set if we should emit symbols for stubs. */ |
| 2730 | unsigned int emit_stub_syms:1; |
| 2731 | |
| 2732 | /* Set if __tls_get_addr optimization should not be done. */ |
| 2733 | unsigned int no_tls_get_addr_opt:1; |
| 2734 | |
| 2735 | /* True if the target system is VxWorks. */ |
| 2736 | unsigned int is_vxworks:1; |
| 2737 | |
| 2738 | /* The size of PLT entries. */ |
| 2739 | int plt_entry_size; |
| 2740 | /* The distance between adjacent PLT slots. */ |
| 2741 | int plt_slot_size; |
| 2742 | /* The size of the first PLT entry. */ |
| 2743 | int plt_initial_entry_size; |
| 2744 | |
| 2745 | /* Small local sym cache. */ |
| 2746 | struct sym_cache sym_cache; |
| 2747 | }; |
| 2748 | |
| 2749 | /* Rename some of the generic section flags to better document how they |
| 2750 | are used here. */ |
| 2751 | |
| 2752 | /* Nonzero if this section has TLS related relocations. */ |
| 2753 | #define has_tls_reloc sec_flg0 |
| 2754 | |
| 2755 | /* Nonzero if this section has a call to __tls_get_addr. */ |
| 2756 | #define has_tls_get_addr_call sec_flg1 |
| 2757 | |
| 2758 | /* Get the PPC ELF linker hash table from a link_info structure. */ |
| 2759 | |
| 2760 | #define ppc_elf_hash_table(p) \ |
| 2761 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 2762 | == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) |
| 2763 | |
| 2764 | /* Create an entry in a PPC ELF linker hash table. */ |
| 2765 | |
| 2766 | static struct bfd_hash_entry * |
| 2767 | ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 2768 | struct bfd_hash_table *table, |
| 2769 | const char *string) |
| 2770 | { |
| 2771 | /* Allocate the structure if it has not already been allocated by a |
| 2772 | subclass. */ |
| 2773 | if (entry == NULL) |
| 2774 | { |
| 2775 | entry = bfd_hash_allocate (table, |
| 2776 | sizeof (struct ppc_elf_link_hash_entry)); |
| 2777 | if (entry == NULL) |
| 2778 | return entry; |
| 2779 | } |
| 2780 | |
| 2781 | /* Call the allocation method of the superclass. */ |
| 2782 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 2783 | if (entry != NULL) |
| 2784 | { |
| 2785 | ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; |
| 2786 | ppc_elf_hash_entry (entry)->dyn_relocs = NULL; |
| 2787 | ppc_elf_hash_entry (entry)->tls_mask = 0; |
| 2788 | } |
| 2789 | |
| 2790 | return entry; |
| 2791 | } |
| 2792 | |
| 2793 | /* Create a PPC ELF linker hash table. */ |
| 2794 | |
| 2795 | static struct bfd_link_hash_table * |
| 2796 | ppc_elf_link_hash_table_create (bfd *abfd) |
| 2797 | { |
| 2798 | struct ppc_elf_link_hash_table *ret; |
| 2799 | |
| 2800 | ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); |
| 2801 | if (ret == NULL) |
| 2802 | return NULL; |
| 2803 | |
| 2804 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 2805 | ppc_elf_link_hash_newfunc, |
| 2806 | sizeof (struct ppc_elf_link_hash_entry), |
| 2807 | PPC32_ELF_DATA)) |
| 2808 | { |
| 2809 | free (ret); |
| 2810 | return NULL; |
| 2811 | } |
| 2812 | |
| 2813 | ret->elf.init_plt_refcount.refcount = 0; |
| 2814 | ret->elf.init_plt_refcount.glist = NULL; |
| 2815 | ret->elf.init_plt_offset.offset = 0; |
| 2816 | ret->elf.init_plt_offset.glist = NULL; |
| 2817 | |
| 2818 | ret->sdata[0].name = ".sdata"; |
| 2819 | ret->sdata[0].sym_name = "_SDA_BASE_"; |
| 2820 | ret->sdata[0].bss_name = ".sbss"; |
| 2821 | |
| 2822 | ret->sdata[1].name = ".sdata2"; |
| 2823 | ret->sdata[1].sym_name = "_SDA2_BASE_"; |
| 2824 | ret->sdata[1].bss_name = ".sbss2"; |
| 2825 | |
| 2826 | ret->plt_entry_size = 12; |
| 2827 | ret->plt_slot_size = 8; |
| 2828 | ret->plt_initial_entry_size = 72; |
| 2829 | |
| 2830 | return &ret->elf.root; |
| 2831 | } |
| 2832 | |
| 2833 | /* Create .got and the related sections. */ |
| 2834 | |
| 2835 | static bfd_boolean |
| 2836 | ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) |
| 2837 | { |
| 2838 | struct ppc_elf_link_hash_table *htab; |
| 2839 | asection *s; |
| 2840 | flagword flags; |
| 2841 | |
| 2842 | if (!_bfd_elf_create_got_section (abfd, info)) |
| 2843 | return FALSE; |
| 2844 | |
| 2845 | htab = ppc_elf_hash_table (info); |
| 2846 | htab->got = s = bfd_get_section_by_name (abfd, ".got"); |
| 2847 | if (s == NULL) |
| 2848 | abort (); |
| 2849 | |
| 2850 | if (htab->is_vxworks) |
| 2851 | { |
| 2852 | htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt"); |
| 2853 | if (!htab->sgotplt) |
| 2854 | abort (); |
| 2855 | } |
| 2856 | else |
| 2857 | { |
| 2858 | /* The powerpc .got has a blrl instruction in it. Mark it |
| 2859 | executable. */ |
| 2860 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS |
| 2861 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2862 | if (!bfd_set_section_flags (abfd, s, flags)) |
| 2863 | return FALSE; |
| 2864 | } |
| 2865 | |
| 2866 | htab->relgot = bfd_get_section_by_name (abfd, ".rela.got"); |
| 2867 | if (!htab->relgot) |
| 2868 | abort (); |
| 2869 | |
| 2870 | return TRUE; |
| 2871 | } |
| 2872 | |
| 2873 | static bfd_boolean |
| 2874 | ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) |
| 2875 | { |
| 2876 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 2877 | asection *s; |
| 2878 | flagword flags; |
| 2879 | |
| 2880 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS |
| 2881 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2882 | s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); |
| 2883 | htab->glink = s; |
| 2884 | if (s == NULL |
| 2885 | || !bfd_set_section_alignment (abfd, s, 4)) |
| 2886 | return FALSE; |
| 2887 | |
| 2888 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
| 2889 | s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); |
| 2890 | htab->iplt = s; |
| 2891 | if (s == NULL |
| 2892 | || !bfd_set_section_alignment (abfd, s, 4)) |
| 2893 | return FALSE; |
| 2894 | |
| 2895 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 2896 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2897 | s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags); |
| 2898 | htab->reliplt = s; |
| 2899 | if (s == NULL |
| 2900 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 2901 | return FALSE; |
| 2902 | return TRUE; |
| 2903 | } |
| 2904 | |
| 2905 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| 2906 | to output sections (just like _bfd_elf_create_dynamic_sections has |
| 2907 | to create .dynbss and .rela.bss). */ |
| 2908 | |
| 2909 | static bfd_boolean |
| 2910 | ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 2911 | { |
| 2912 | struct ppc_elf_link_hash_table *htab; |
| 2913 | asection *s; |
| 2914 | flagword flags; |
| 2915 | |
| 2916 | htab = ppc_elf_hash_table (info); |
| 2917 | |
| 2918 | if (htab->got == NULL |
| 2919 | && !ppc_elf_create_got (abfd, info)) |
| 2920 | return FALSE; |
| 2921 | |
| 2922 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| 2923 | return FALSE; |
| 2924 | |
| 2925 | if (htab->glink == NULL |
| 2926 | && !ppc_elf_create_glink (abfd, info)) |
| 2927 | return FALSE; |
| 2928 | |
| 2929 | htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); |
| 2930 | s = bfd_make_section_with_flags (abfd, ".dynsbss", |
| 2931 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 2932 | htab->dynsbss = s; |
| 2933 | if (s == NULL) |
| 2934 | return FALSE; |
| 2935 | |
| 2936 | if (! info->shared) |
| 2937 | { |
| 2938 | htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); |
| 2939 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 2940 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2941 | s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags); |
| 2942 | htab->relsbss = s; |
| 2943 | if (s == NULL |
| 2944 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 2945 | return FALSE; |
| 2946 | } |
| 2947 | |
| 2948 | if (htab->is_vxworks |
| 2949 | && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) |
| 2950 | return FALSE; |
| 2951 | |
| 2952 | htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2953 | htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); |
| 2954 | if (s == NULL) |
| 2955 | abort (); |
| 2956 | |
| 2957 | flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; |
| 2958 | if (htab->plt_type == PLT_VXWORKS) |
| 2959 | /* The VxWorks PLT is a loaded section with contents. */ |
| 2960 | flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; |
| 2961 | return bfd_set_section_flags (abfd, s, flags); |
| 2962 | } |
| 2963 | |
| 2964 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2965 | |
| 2966 | static void |
| 2967 | ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 2968 | struct elf_link_hash_entry *dir, |
| 2969 | struct elf_link_hash_entry *ind) |
| 2970 | { |
| 2971 | struct ppc_elf_link_hash_entry *edir, *eind; |
| 2972 | |
| 2973 | edir = (struct ppc_elf_link_hash_entry *) dir; |
| 2974 | eind = (struct ppc_elf_link_hash_entry *) ind; |
| 2975 | |
| 2976 | if (eind->dyn_relocs != NULL) |
| 2977 | { |
| 2978 | if (edir->dyn_relocs != NULL) |
| 2979 | { |
| 2980 | struct ppc_elf_dyn_relocs **pp; |
| 2981 | struct ppc_elf_dyn_relocs *p; |
| 2982 | |
| 2983 | /* Add reloc counts against the indirect sym to the direct sym |
| 2984 | list. Merge any entries against the same section. */ |
| 2985 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 2986 | { |
| 2987 | struct ppc_elf_dyn_relocs *q; |
| 2988 | |
| 2989 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2990 | if (q->sec == p->sec) |
| 2991 | { |
| 2992 | q->pc_count += p->pc_count; |
| 2993 | q->count += p->count; |
| 2994 | *pp = p->next; |
| 2995 | break; |
| 2996 | } |
| 2997 | if (q == NULL) |
| 2998 | pp = &p->next; |
| 2999 | } |
| 3000 | *pp = edir->dyn_relocs; |
| 3001 | } |
| 3002 | |
| 3003 | edir->dyn_relocs = eind->dyn_relocs; |
| 3004 | eind->dyn_relocs = NULL; |
| 3005 | } |
| 3006 | |
| 3007 | edir->tls_mask |= eind->tls_mask; |
| 3008 | edir->has_sda_refs |= eind->has_sda_refs; |
| 3009 | |
| 3010 | /* If called to transfer flags for a weakdef during processing |
| 3011 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. |
| 3012 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 3013 | if (!(ELIMINATE_COPY_RELOCS |
| 3014 | && eind->elf.root.type != bfd_link_hash_indirect |
| 3015 | && edir->elf.dynamic_adjusted)) |
| 3016 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
| 3017 | |
| 3018 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
| 3019 | edir->elf.ref_regular |= eind->elf.ref_regular; |
| 3020 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; |
| 3021 | edir->elf.needs_plt |= eind->elf.needs_plt; |
| 3022 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; |
| 3023 | |
| 3024 | /* If we were called to copy over info for a weak sym, that's all. */ |
| 3025 | if (eind->elf.root.type != bfd_link_hash_indirect) |
| 3026 | return; |
| 3027 | |
| 3028 | /* Copy over the GOT refcount entries that we may have already seen to |
| 3029 | the symbol which just became indirect. */ |
| 3030 | edir->elf.got.refcount += eind->elf.got.refcount; |
| 3031 | eind->elf.got.refcount = 0; |
| 3032 | |
| 3033 | /* And plt entries. */ |
| 3034 | if (eind->elf.plt.plist != NULL) |
| 3035 | { |
| 3036 | if (edir->elf.plt.plist != NULL) |
| 3037 | { |
| 3038 | struct plt_entry **entp; |
| 3039 | struct plt_entry *ent; |
| 3040 | |
| 3041 | for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) |
| 3042 | { |
| 3043 | struct plt_entry *dent; |
| 3044 | |
| 3045 | for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) |
| 3046 | if (dent->sec == ent->sec && dent->addend == ent->addend) |
| 3047 | { |
| 3048 | dent->plt.refcount += ent->plt.refcount; |
| 3049 | *entp = ent->next; |
| 3050 | break; |
| 3051 | } |
| 3052 | if (dent == NULL) |
| 3053 | entp = &ent->next; |
| 3054 | } |
| 3055 | *entp = edir->elf.plt.plist; |
| 3056 | } |
| 3057 | |
| 3058 | edir->elf.plt.plist = eind->elf.plt.plist; |
| 3059 | eind->elf.plt.plist = NULL; |
| 3060 | } |
| 3061 | |
| 3062 | if (eind->elf.dynindx != -1) |
| 3063 | { |
| 3064 | if (edir->elf.dynindx != -1) |
| 3065 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 3066 | edir->elf.dynstr_index); |
| 3067 | edir->elf.dynindx = eind->elf.dynindx; |
| 3068 | edir->elf.dynstr_index = eind->elf.dynstr_index; |
| 3069 | eind->elf.dynindx = -1; |
| 3070 | eind->elf.dynstr_index = 0; |
| 3071 | } |
| 3072 | } |
| 3073 | |
| 3074 | /* Hook called by the linker routine which adds symbols from an object |
| 3075 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 3076 | |
| 3077 | static bfd_boolean |
| 3078 | ppc_elf_add_symbol_hook (bfd *abfd, |
| 3079 | struct bfd_link_info *info, |
| 3080 | Elf_Internal_Sym *sym, |
| 3081 | const char **namep ATTRIBUTE_UNUSED, |
| 3082 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 3083 | asection **secp, |
| 3084 | bfd_vma *valp) |
| 3085 | { |
| 3086 | if (sym->st_shndx == SHN_COMMON |
| 3087 | && !info->relocatable |
| 3088 | && is_ppc_elf (info->output_bfd) |
| 3089 | && sym->st_size <= elf_gp_size (abfd)) |
| 3090 | { |
| 3091 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 3092 | put into .sbss. */ |
| 3093 | struct ppc_elf_link_hash_table *htab; |
| 3094 | |
| 3095 | htab = ppc_elf_hash_table (info); |
| 3096 | if (htab->sbss == NULL) |
| 3097 | { |
| 3098 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; |
| 3099 | |
| 3100 | if (!htab->elf.dynobj) |
| 3101 | htab->elf.dynobj = abfd; |
| 3102 | |
| 3103 | htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 3104 | ".sbss", |
| 3105 | flags); |
| 3106 | if (htab->sbss == NULL) |
| 3107 | return FALSE; |
| 3108 | } |
| 3109 | |
| 3110 | *secp = htab->sbss; |
| 3111 | *valp = sym->st_size; |
| 3112 | } |
| 3113 | |
| 3114 | if ((abfd->flags & DYNAMIC) == 0 |
| 3115 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 3116 | elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE; |
| 3117 | |
| 3118 | return TRUE; |
| 3119 | } |
| 3120 | \f |
| 3121 | static bfd_boolean |
| 3122 | create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect) |
| 3123 | { |
| 3124 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3125 | |
| 3126 | lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name, |
| 3127 | TRUE, FALSE, TRUE); |
| 3128 | if (lsect->sym == NULL) |
| 3129 | return FALSE; |
| 3130 | if (lsect->sym->root.type == bfd_link_hash_new) |
| 3131 | lsect->sym->non_elf = 0; |
| 3132 | lsect->sym->ref_regular = 1; |
| 3133 | _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE); |
| 3134 | return TRUE; |
| 3135 | } |
| 3136 | |
| 3137 | /* Create a special linker section. */ |
| 3138 | |
| 3139 | static bfd_boolean |
| 3140 | ppc_elf_create_linker_section (bfd *abfd, |
| 3141 | struct bfd_link_info *info, |
| 3142 | flagword flags, |
| 3143 | elf_linker_section_t *lsect) |
| 3144 | { |
| 3145 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3146 | asection *s; |
| 3147 | |
| 3148 | flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3149 | | SEC_LINKER_CREATED); |
| 3150 | |
| 3151 | /* Record the first bfd that needs the special sections. */ |
| 3152 | if (!htab->elf.dynobj) |
| 3153 | htab->elf.dynobj = abfd; |
| 3154 | |
| 3155 | s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 3156 | lsect->name, |
| 3157 | flags); |
| 3158 | if (s == NULL |
| 3159 | || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) |
| 3160 | return FALSE; |
| 3161 | lsect->section = s; |
| 3162 | |
| 3163 | return create_sdata_sym (info, lsect); |
| 3164 | } |
| 3165 | |
| 3166 | /* Find a linker generated pointer with a given addend and type. */ |
| 3167 | |
| 3168 | static elf_linker_section_pointers_t * |
| 3169 | elf_find_pointer_linker_section |
| 3170 | (elf_linker_section_pointers_t *linker_pointers, |
| 3171 | bfd_vma addend, |
| 3172 | elf_linker_section_t *lsect) |
| 3173 | { |
| 3174 | for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) |
| 3175 | if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) |
| 3176 | return linker_pointers; |
| 3177 | |
| 3178 | return NULL; |
| 3179 | } |
| 3180 | |
| 3181 | /* Allocate a pointer to live in a linker created section. */ |
| 3182 | |
| 3183 | static bfd_boolean |
| 3184 | elf_create_pointer_linker_section (bfd *abfd, |
| 3185 | elf_linker_section_t *lsect, |
| 3186 | struct elf_link_hash_entry *h, |
| 3187 | const Elf_Internal_Rela *rel) |
| 3188 | { |
| 3189 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; |
| 3190 | elf_linker_section_pointers_t *linker_section_ptr; |
| 3191 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 3192 | bfd_size_type amt; |
| 3193 | |
| 3194 | BFD_ASSERT (lsect != NULL); |
| 3195 | |
| 3196 | /* Is this a global symbol? */ |
| 3197 | if (h != NULL) |
| 3198 | { |
| 3199 | struct ppc_elf_link_hash_entry *eh; |
| 3200 | |
| 3201 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 3202 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 3203 | if (elf_find_pointer_linker_section (eh->linker_section_pointer, |
| 3204 | rel->r_addend, |
| 3205 | lsect)) |
| 3206 | return TRUE; |
| 3207 | |
| 3208 | ptr_linker_section_ptr = &eh->linker_section_pointer; |
| 3209 | } |
| 3210 | else |
| 3211 | { |
| 3212 | BFD_ASSERT (is_ppc_elf (abfd)); |
| 3213 | |
| 3214 | /* Allocation of a pointer to a local symbol. */ |
| 3215 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
| 3216 | |
| 3217 | /* Allocate a table to hold the local symbols if first time. */ |
| 3218 | if (!ptr) |
| 3219 | { |
| 3220 | unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; |
| 3221 | |
| 3222 | amt = num_symbols; |
| 3223 | amt *= sizeof (elf_linker_section_pointers_t *); |
| 3224 | ptr = bfd_zalloc (abfd, amt); |
| 3225 | |
| 3226 | if (!ptr) |
| 3227 | return FALSE; |
| 3228 | |
| 3229 | elf_local_ptr_offsets (abfd) = ptr; |
| 3230 | } |
| 3231 | |
| 3232 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 3233 | if (elf_find_pointer_linker_section (ptr[r_symndx], |
| 3234 | rel->r_addend, |
| 3235 | lsect)) |
| 3236 | return TRUE; |
| 3237 | |
| 3238 | ptr_linker_section_ptr = &ptr[r_symndx]; |
| 3239 | } |
| 3240 | |
| 3241 | /* Allocate space for a pointer in the linker section, and allocate |
| 3242 | a new pointer record from internal memory. */ |
| 3243 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
| 3244 | amt = sizeof (elf_linker_section_pointers_t); |
| 3245 | linker_section_ptr = bfd_alloc (abfd, amt); |
| 3246 | |
| 3247 | if (!linker_section_ptr) |
| 3248 | return FALSE; |
| 3249 | |
| 3250 | linker_section_ptr->next = *ptr_linker_section_ptr; |
| 3251 | linker_section_ptr->addend = rel->r_addend; |
| 3252 | linker_section_ptr->lsect = lsect; |
| 3253 | *ptr_linker_section_ptr = linker_section_ptr; |
| 3254 | |
| 3255 | linker_section_ptr->offset = lsect->section->size; |
| 3256 | lsect->section->size += 4; |
| 3257 | |
| 3258 | #ifdef DEBUG |
| 3259 | fprintf (stderr, |
| 3260 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", |
| 3261 | lsect->name, (long) linker_section_ptr->offset, |
| 3262 | (long) lsect->section->size); |
| 3263 | #endif |
| 3264 | |
| 3265 | return TRUE; |
| 3266 | } |
| 3267 | |
| 3268 | static struct plt_entry ** |
| 3269 | update_local_sym_info (bfd *abfd, |
| 3270 | Elf_Internal_Shdr *symtab_hdr, |
| 3271 | unsigned long r_symndx, |
| 3272 | int tls_type) |
| 3273 | { |
| 3274 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3275 | struct plt_entry **local_plt; |
| 3276 | char *local_got_tls_masks; |
| 3277 | |
| 3278 | if (local_got_refcounts == NULL) |
| 3279 | { |
| 3280 | bfd_size_type size = symtab_hdr->sh_info; |
| 3281 | |
| 3282 | size *= (sizeof (*local_got_refcounts) |
| 3283 | + sizeof (*local_plt) |
| 3284 | + sizeof (*local_got_tls_masks)); |
| 3285 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 3286 | if (local_got_refcounts == NULL) |
| 3287 | return NULL; |
| 3288 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 3289 | } |
| 3290 | |
| 3291 | local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); |
| 3292 | local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 3293 | local_got_tls_masks[r_symndx] |= tls_type; |
| 3294 | if (tls_type != PLT_IFUNC) |
| 3295 | local_got_refcounts[r_symndx] += 1; |
| 3296 | return local_plt + r_symndx; |
| 3297 | } |
| 3298 | |
| 3299 | static bfd_boolean |
| 3300 | update_plt_info (bfd *abfd, struct plt_entry **plist, |
| 3301 | asection *sec, bfd_vma addend) |
| 3302 | { |
| 3303 | struct plt_entry *ent; |
| 3304 | |
| 3305 | if (addend < 32768) |
| 3306 | sec = NULL; |
| 3307 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 3308 | if (ent->sec == sec && ent->addend == addend) |
| 3309 | break; |
| 3310 | if (ent == NULL) |
| 3311 | { |
| 3312 | bfd_size_type amt = sizeof (*ent); |
| 3313 | ent = bfd_alloc (abfd, amt); |
| 3314 | if (ent == NULL) |
| 3315 | return FALSE; |
| 3316 | ent->next = *plist; |
| 3317 | ent->sec = sec; |
| 3318 | ent->addend = addend; |
| 3319 | ent->plt.refcount = 0; |
| 3320 | *plist = ent; |
| 3321 | } |
| 3322 | ent->plt.refcount += 1; |
| 3323 | return TRUE; |
| 3324 | } |
| 3325 | |
| 3326 | static struct plt_entry * |
| 3327 | find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) |
| 3328 | { |
| 3329 | struct plt_entry *ent; |
| 3330 | |
| 3331 | if (addend < 32768) |
| 3332 | sec = NULL; |
| 3333 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 3334 | if (ent->sec == sec && ent->addend == addend) |
| 3335 | break; |
| 3336 | return ent; |
| 3337 | } |
| 3338 | |
| 3339 | static bfd_boolean |
| 3340 | is_branch_reloc (enum elf_ppc_reloc_type r_type) |
| 3341 | { |
| 3342 | return (r_type == R_PPC_PLTREL24 |
| 3343 | || r_type == R_PPC_LOCAL24PC |
| 3344 | || r_type == R_PPC_REL24 |
| 3345 | || r_type == R_PPC_REL14 |
| 3346 | || r_type == R_PPC_REL14_BRTAKEN |
| 3347 | || r_type == R_PPC_REL14_BRNTAKEN |
| 3348 | || r_type == R_PPC_ADDR24 |
| 3349 | || r_type == R_PPC_ADDR14 |
| 3350 | || r_type == R_PPC_ADDR14_BRTAKEN |
| 3351 | || r_type == R_PPC_ADDR14_BRNTAKEN); |
| 3352 | } |
| 3353 | |
| 3354 | static void |
| 3355 | bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) |
| 3356 | { |
| 3357 | (*_bfd_error_handler) |
| 3358 | (_("%B: relocation %s cannot be used when making a shared object"), |
| 3359 | abfd, |
| 3360 | ppc_elf_howto_table[r_type]->name); |
| 3361 | bfd_set_error (bfd_error_bad_value); |
| 3362 | } |
| 3363 | |
| 3364 | /* Look through the relocs for a section during the first phase, and |
| 3365 | allocate space in the global offset table or procedure linkage |
| 3366 | table. */ |
| 3367 | |
| 3368 | static bfd_boolean |
| 3369 | ppc_elf_check_relocs (bfd *abfd, |
| 3370 | struct bfd_link_info *info, |
| 3371 | asection *sec, |
| 3372 | const Elf_Internal_Rela *relocs) |
| 3373 | { |
| 3374 | struct ppc_elf_link_hash_table *htab; |
| 3375 | Elf_Internal_Shdr *symtab_hdr; |
| 3376 | struct elf_link_hash_entry **sym_hashes; |
| 3377 | const Elf_Internal_Rela *rel; |
| 3378 | const Elf_Internal_Rela *rel_end; |
| 3379 | asection *got2, *sreloc; |
| 3380 | struct elf_link_hash_entry *tga; |
| 3381 | |
| 3382 | if (info->relocatable) |
| 3383 | return TRUE; |
| 3384 | |
| 3385 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 3386 | In particular, any relocs in such sections should not affect GOT |
| 3387 | and PLT reference counting (ie. we don't allow them to create GOT |
| 3388 | or PLT entries), there's no possibility or desire to optimize TLS |
| 3389 | relocs, and there's not much point in propagating relocs to shared |
| 3390 | libs that the dynamic linker won't relocate. */ |
| 3391 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3392 | return TRUE; |
| 3393 | |
| 3394 | #ifdef DEBUG |
| 3395 | _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", |
| 3396 | sec, abfd); |
| 3397 | #endif |
| 3398 | |
| 3399 | BFD_ASSERT (is_ppc_elf (abfd)); |
| 3400 | |
| 3401 | /* Initialize howto table if not already done. */ |
| 3402 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 3403 | ppc_elf_howto_init (); |
| 3404 | |
| 3405 | htab = ppc_elf_hash_table (info); |
| 3406 | if (htab->glink == NULL) |
| 3407 | { |
| 3408 | if (htab->elf.dynobj == NULL) |
| 3409 | htab->elf.dynobj = abfd; |
| 3410 | if (!ppc_elf_create_glink (htab->elf.dynobj, info)) |
| 3411 | return FALSE; |
| 3412 | } |
| 3413 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 3414 | FALSE, FALSE, TRUE); |
| 3415 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 3416 | sym_hashes = elf_sym_hashes (abfd); |
| 3417 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 3418 | sreloc = NULL; |
| 3419 | |
| 3420 | rel_end = relocs + sec->reloc_count; |
| 3421 | for (rel = relocs; rel < rel_end; rel++) |
| 3422 | { |
| 3423 | unsigned long r_symndx; |
| 3424 | enum elf_ppc_reloc_type r_type; |
| 3425 | struct elf_link_hash_entry *h; |
| 3426 | int tls_type; |
| 3427 | |
| 3428 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3429 | if (r_symndx < symtab_hdr->sh_info) |
| 3430 | h = NULL; |
| 3431 | else |
| 3432 | { |
| 3433 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3434 | while (h->root.type == bfd_link_hash_indirect |
| 3435 | || h->root.type == bfd_link_hash_warning) |
| 3436 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3437 | } |
| 3438 | |
| 3439 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 3440 | This shows up in particular in an R_PPC_ADDR32 in the eabi |
| 3441 | startup code. */ |
| 3442 | if (h != NULL |
| 3443 | && htab->got == NULL |
| 3444 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3445 | { |
| 3446 | if (htab->elf.dynobj == NULL) |
| 3447 | htab->elf.dynobj = abfd; |
| 3448 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 3449 | return FALSE; |
| 3450 | BFD_ASSERT (h == htab->elf.hgot); |
| 3451 | } |
| 3452 | |
| 3453 | tls_type = 0; |
| 3454 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3455 | if (h == NULL && !htab->is_vxworks) |
| 3456 | { |
| 3457 | Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 3458 | abfd, r_symndx); |
| 3459 | if (isym == NULL) |
| 3460 | return FALSE; |
| 3461 | |
| 3462 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC |
| 3463 | && (!info->shared |
| 3464 | || is_branch_reloc (r_type))) |
| 3465 | { |
| 3466 | struct plt_entry **ifunc; |
| 3467 | bfd_vma addend; |
| 3468 | |
| 3469 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 3470 | PLT_IFUNC); |
| 3471 | if (ifunc == NULL) |
| 3472 | return FALSE; |
| 3473 | |
| 3474 | /* STT_GNU_IFUNC symbols must have a PLT entry; |
| 3475 | In a non-pie executable even when there are |
| 3476 | no plt calls. */ |
| 3477 | addend = 0; |
| 3478 | if (r_type == R_PPC_PLTREL24) |
| 3479 | { |
| 3480 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
| 3481 | if (info->shared) |
| 3482 | addend = rel->r_addend; |
| 3483 | } |
| 3484 | if (!update_plt_info (abfd, ifunc, got2, addend)) |
| 3485 | return FALSE; |
| 3486 | } |
| 3487 | } |
| 3488 | |
| 3489 | if (!htab->is_vxworks |
| 3490 | && is_branch_reloc (r_type) |
| 3491 | && h != NULL |
| 3492 | && h == tga) |
| 3493 | { |
| 3494 | if (rel != relocs |
| 3495 | && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD |
| 3496 | || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) |
| 3497 | /* We have a new-style __tls_get_addr call with a marker |
| 3498 | reloc. */ |
| 3499 | ; |
| 3500 | else |
| 3501 | /* Mark this section as having an old-style call. */ |
| 3502 | sec->has_tls_get_addr_call = 1; |
| 3503 | } |
| 3504 | |
| 3505 | switch (r_type) |
| 3506 | { |
| 3507 | case R_PPC_TLSGD: |
| 3508 | case R_PPC_TLSLD: |
| 3509 | /* These special tls relocs tie a call to __tls_get_addr with |
| 3510 | its parameter symbol. */ |
| 3511 | break; |
| 3512 | |
| 3513 | case R_PPC_GOT_TLSLD16: |
| 3514 | case R_PPC_GOT_TLSLD16_LO: |
| 3515 | case R_PPC_GOT_TLSLD16_HI: |
| 3516 | case R_PPC_GOT_TLSLD16_HA: |
| 3517 | tls_type = TLS_TLS | TLS_LD; |
| 3518 | goto dogottls; |
| 3519 | |
| 3520 | case R_PPC_GOT_TLSGD16: |
| 3521 | case R_PPC_GOT_TLSGD16_LO: |
| 3522 | case R_PPC_GOT_TLSGD16_HI: |
| 3523 | case R_PPC_GOT_TLSGD16_HA: |
| 3524 | tls_type = TLS_TLS | TLS_GD; |
| 3525 | goto dogottls; |
| 3526 | |
| 3527 | case R_PPC_GOT_TPREL16: |
| 3528 | case R_PPC_GOT_TPREL16_LO: |
| 3529 | case R_PPC_GOT_TPREL16_HI: |
| 3530 | case R_PPC_GOT_TPREL16_HA: |
| 3531 | if (!info->executable) |
| 3532 | info->flags |= DF_STATIC_TLS; |
| 3533 | tls_type = TLS_TLS | TLS_TPREL; |
| 3534 | goto dogottls; |
| 3535 | |
| 3536 | case R_PPC_GOT_DTPREL16: |
| 3537 | case R_PPC_GOT_DTPREL16_LO: |
| 3538 | case R_PPC_GOT_DTPREL16_HI: |
| 3539 | case R_PPC_GOT_DTPREL16_HA: |
| 3540 | tls_type = TLS_TLS | TLS_DTPREL; |
| 3541 | dogottls: |
| 3542 | sec->has_tls_reloc = 1; |
| 3543 | /* Fall thru */ |
| 3544 | |
| 3545 | /* GOT16 relocations */ |
| 3546 | case R_PPC_GOT16: |
| 3547 | case R_PPC_GOT16_LO: |
| 3548 | case R_PPC_GOT16_HI: |
| 3549 | case R_PPC_GOT16_HA: |
| 3550 | /* This symbol requires a global offset table entry. */ |
| 3551 | if (htab->got == NULL) |
| 3552 | { |
| 3553 | if (htab->elf.dynobj == NULL) |
| 3554 | htab->elf.dynobj = abfd; |
| 3555 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 3556 | return FALSE; |
| 3557 | } |
| 3558 | if (h != NULL) |
| 3559 | { |
| 3560 | h->got.refcount += 1; |
| 3561 | ppc_elf_hash_entry (h)->tls_mask |= tls_type; |
| 3562 | } |
| 3563 | else |
| 3564 | /* This is a global offset table entry for a local symbol. */ |
| 3565 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) |
| 3566 | return FALSE; |
| 3567 | |
| 3568 | /* We may also need a plt entry if the symbol turns out to be |
| 3569 | an ifunc. */ |
| 3570 | if (h != NULL && !info->shared) |
| 3571 | { |
| 3572 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 3573 | return FALSE; |
| 3574 | } |
| 3575 | break; |
| 3576 | |
| 3577 | /* Indirect .sdata relocation. */ |
| 3578 | case R_PPC_EMB_SDAI16: |
| 3579 | if (info->shared) |
| 3580 | { |
| 3581 | bad_shared_reloc (abfd, r_type); |
| 3582 | return FALSE; |
| 3583 | } |
| 3584 | if (htab->sdata[0].section == NULL |
| 3585 | && !ppc_elf_create_linker_section (abfd, info, 0, |
| 3586 | &htab->sdata[0])) |
| 3587 | return FALSE; |
| 3588 | if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], |
| 3589 | h, rel)) |
| 3590 | return FALSE; |
| 3591 | if (h != NULL) |
| 3592 | { |
| 3593 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 3594 | h->non_got_ref = TRUE; |
| 3595 | } |
| 3596 | break; |
| 3597 | |
| 3598 | /* Indirect .sdata2 relocation. */ |
| 3599 | case R_PPC_EMB_SDA2I16: |
| 3600 | if (info->shared) |
| 3601 | { |
| 3602 | bad_shared_reloc (abfd, r_type); |
| 3603 | return FALSE; |
| 3604 | } |
| 3605 | if (htab->sdata[1].section == NULL |
| 3606 | && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, |
| 3607 | &htab->sdata[1])) |
| 3608 | return FALSE; |
| 3609 | if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], |
| 3610 | h, rel)) |
| 3611 | return FALSE; |
| 3612 | if (h != NULL) |
| 3613 | { |
| 3614 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 3615 | h->non_got_ref = TRUE; |
| 3616 | } |
| 3617 | break; |
| 3618 | |
| 3619 | case R_PPC_SDAREL16: |
| 3620 | if (htab->sdata[0].sym == NULL |
| 3621 | && !create_sdata_sym (info, &htab->sdata[0])) |
| 3622 | return FALSE; |
| 3623 | if (h != NULL) |
| 3624 | { |
| 3625 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 3626 | h->non_got_ref = TRUE; |
| 3627 | } |
| 3628 | break; |
| 3629 | |
| 3630 | case R_PPC_EMB_SDA2REL: |
| 3631 | if (info->shared) |
| 3632 | { |
| 3633 | bad_shared_reloc (abfd, r_type); |
| 3634 | return FALSE; |
| 3635 | } |
| 3636 | if (htab->sdata[1].sym == NULL |
| 3637 | && !create_sdata_sym (info, &htab->sdata[1])) |
| 3638 | return FALSE; |
| 3639 | if (h != NULL) |
| 3640 | { |
| 3641 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 3642 | h->non_got_ref = TRUE; |
| 3643 | } |
| 3644 | break; |
| 3645 | |
| 3646 | case R_PPC_EMB_SDA21: |
| 3647 | case R_PPC_EMB_RELSDA: |
| 3648 | if (info->shared) |
| 3649 | { |
| 3650 | bad_shared_reloc (abfd, r_type); |
| 3651 | return FALSE; |
| 3652 | } |
| 3653 | if (htab->sdata[0].sym == NULL |
| 3654 | && !create_sdata_sym (info, &htab->sdata[0])) |
| 3655 | return FALSE; |
| 3656 | if (htab->sdata[1].sym == NULL |
| 3657 | && !create_sdata_sym (info, &htab->sdata[1])) |
| 3658 | return FALSE; |
| 3659 | if (h != NULL) |
| 3660 | { |
| 3661 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 3662 | h->non_got_ref = TRUE; |
| 3663 | } |
| 3664 | break; |
| 3665 | |
| 3666 | case R_PPC_EMB_NADDR32: |
| 3667 | case R_PPC_EMB_NADDR16: |
| 3668 | case R_PPC_EMB_NADDR16_LO: |
| 3669 | case R_PPC_EMB_NADDR16_HI: |
| 3670 | case R_PPC_EMB_NADDR16_HA: |
| 3671 | if (info->shared) |
| 3672 | { |
| 3673 | bad_shared_reloc (abfd, r_type); |
| 3674 | return FALSE; |
| 3675 | } |
| 3676 | if (h != NULL) |
| 3677 | h->non_got_ref = TRUE; |
| 3678 | break; |
| 3679 | |
| 3680 | case R_PPC_PLTREL24: |
| 3681 | if (h == NULL) |
| 3682 | break; |
| 3683 | /* Fall through */ |
| 3684 | case R_PPC_PLT32: |
| 3685 | case R_PPC_PLTREL32: |
| 3686 | case R_PPC_PLT16_LO: |
| 3687 | case R_PPC_PLT16_HI: |
| 3688 | case R_PPC_PLT16_HA: |
| 3689 | #ifdef DEBUG |
| 3690 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 3691 | #endif |
| 3692 | /* This symbol requires a procedure linkage table entry. We |
| 3693 | actually build the entry in finish_dynamic_symbol, |
| 3694 | because this might be a case of linking PIC code without |
| 3695 | linking in any dynamic objects, in which case we don't |
| 3696 | need to generate a procedure linkage table after all. */ |
| 3697 | |
| 3698 | if (h == NULL) |
| 3699 | { |
| 3700 | /* It does not make sense to have a procedure linkage |
| 3701 | table entry for a local symbol. */ |
| 3702 | (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against " |
| 3703 | "local symbol"), |
| 3704 | abfd, |
| 3705 | sec, |
| 3706 | (long) rel->r_offset, |
| 3707 | ppc_elf_howto_table[r_type]->name); |
| 3708 | bfd_set_error (bfd_error_bad_value); |
| 3709 | return FALSE; |
| 3710 | } |
| 3711 | else |
| 3712 | { |
| 3713 | bfd_vma addend = 0; |
| 3714 | |
| 3715 | if (r_type == R_PPC_PLTREL24) |
| 3716 | { |
| 3717 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
| 3718 | if (info->shared) |
| 3719 | addend = rel->r_addend; |
| 3720 | } |
| 3721 | h->needs_plt = 1; |
| 3722 | if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) |
| 3723 | return FALSE; |
| 3724 | } |
| 3725 | break; |
| 3726 | |
| 3727 | /* The following relocations don't need to propagate the |
| 3728 | relocation if linking a shared object since they are |
| 3729 | section relative. */ |
| 3730 | case R_PPC_SECTOFF: |
| 3731 | case R_PPC_SECTOFF_LO: |
| 3732 | case R_PPC_SECTOFF_HI: |
| 3733 | case R_PPC_SECTOFF_HA: |
| 3734 | case R_PPC_DTPREL16: |
| 3735 | case R_PPC_DTPREL16_LO: |
| 3736 | case R_PPC_DTPREL16_HI: |
| 3737 | case R_PPC_DTPREL16_HA: |
| 3738 | case R_PPC_TOC16: |
| 3739 | break; |
| 3740 | |
| 3741 | case R_PPC_REL16: |
| 3742 | case R_PPC_REL16_LO: |
| 3743 | case R_PPC_REL16_HI: |
| 3744 | case R_PPC_REL16_HA: |
| 3745 | ppc_elf_tdata (abfd)->has_rel16 = 1; |
| 3746 | break; |
| 3747 | |
| 3748 | /* These are just markers. */ |
| 3749 | case R_PPC_TLS: |
| 3750 | case R_PPC_EMB_MRKREF: |
| 3751 | case R_PPC_NONE: |
| 3752 | case R_PPC_max: |
| 3753 | case R_PPC_RELAX: |
| 3754 | case R_PPC_RELAX_PLT: |
| 3755 | case R_PPC_RELAX_PLTREL24: |
| 3756 | break; |
| 3757 | |
| 3758 | /* These should only appear in dynamic objects. */ |
| 3759 | case R_PPC_COPY: |
| 3760 | case R_PPC_GLOB_DAT: |
| 3761 | case R_PPC_JMP_SLOT: |
| 3762 | case R_PPC_RELATIVE: |
| 3763 | case R_PPC_IRELATIVE: |
| 3764 | break; |
| 3765 | |
| 3766 | /* These aren't handled yet. We'll report an error later. */ |
| 3767 | case R_PPC_ADDR30: |
| 3768 | case R_PPC_EMB_RELSEC16: |
| 3769 | case R_PPC_EMB_RELST_LO: |
| 3770 | case R_PPC_EMB_RELST_HI: |
| 3771 | case R_PPC_EMB_RELST_HA: |
| 3772 | case R_PPC_EMB_BIT_FLD: |
| 3773 | break; |
| 3774 | |
| 3775 | /* This refers only to functions defined in the shared library. */ |
| 3776 | case R_PPC_LOCAL24PC: |
| 3777 | if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) |
| 3778 | { |
| 3779 | htab->plt_type = PLT_OLD; |
| 3780 | htab->old_bfd = abfd; |
| 3781 | } |
| 3782 | break; |
| 3783 | |
| 3784 | /* This relocation describes the C++ object vtable hierarchy. |
| 3785 | Reconstruct it for later use during GC. */ |
| 3786 | case R_PPC_GNU_VTINHERIT: |
| 3787 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 3788 | return FALSE; |
| 3789 | break; |
| 3790 | |
| 3791 | /* This relocation describes which C++ vtable entries are actually |
| 3792 | used. Record for later use during GC. */ |
| 3793 | case R_PPC_GNU_VTENTRY: |
| 3794 | BFD_ASSERT (h != NULL); |
| 3795 | if (h != NULL |
| 3796 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 3797 | return FALSE; |
| 3798 | break; |
| 3799 | |
| 3800 | /* We shouldn't really be seeing these. */ |
| 3801 | case R_PPC_TPREL32: |
| 3802 | case R_PPC_TPREL16: |
| 3803 | case R_PPC_TPREL16_LO: |
| 3804 | case R_PPC_TPREL16_HI: |
| 3805 | case R_PPC_TPREL16_HA: |
| 3806 | if (!info->executable) |
| 3807 | info->flags |= DF_STATIC_TLS; |
| 3808 | goto dodyn; |
| 3809 | |
| 3810 | /* Nor these. */ |
| 3811 | case R_PPC_DTPMOD32: |
| 3812 | case R_PPC_DTPREL32: |
| 3813 | goto dodyn; |
| 3814 | |
| 3815 | case R_PPC_REL32: |
| 3816 | if (h == NULL |
| 3817 | && got2 != NULL |
| 3818 | && (sec->flags & SEC_CODE) != 0 |
| 3819 | && info->shared |
| 3820 | && htab->plt_type == PLT_UNSET) |
| 3821 | { |
| 3822 | /* Old -fPIC gcc code has .long LCTOC1-LCFx just before |
| 3823 | the start of a function, which assembles to a REL32 |
| 3824 | reference to .got2. If we detect one of these, then |
| 3825 | force the old PLT layout because the linker cannot |
| 3826 | reliably deduce the GOT pointer value needed for |
| 3827 | PLT call stubs. */ |
| 3828 | asection *s; |
| 3829 | Elf_Internal_Sym *isym; |
| 3830 | |
| 3831 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 3832 | abfd, r_symndx); |
| 3833 | if (isym == NULL) |
| 3834 | return FALSE; |
| 3835 | |
| 3836 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3837 | if (s == got2) |
| 3838 | { |
| 3839 | htab->plt_type = PLT_OLD; |
| 3840 | htab->old_bfd = abfd; |
| 3841 | } |
| 3842 | } |
| 3843 | if (h == NULL || h == htab->elf.hgot) |
| 3844 | break; |
| 3845 | /* fall through */ |
| 3846 | |
| 3847 | case R_PPC_ADDR32: |
| 3848 | case R_PPC_ADDR16: |
| 3849 | case R_PPC_ADDR16_LO: |
| 3850 | case R_PPC_ADDR16_HI: |
| 3851 | case R_PPC_ADDR16_HA: |
| 3852 | case R_PPC_UADDR32: |
| 3853 | case R_PPC_UADDR16: |
| 3854 | if (h != NULL && !info->shared) |
| 3855 | { |
| 3856 | /* We may need a plt entry if the symbol turns out to be |
| 3857 | a function defined in a dynamic object. */ |
| 3858 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 3859 | return FALSE; |
| 3860 | |
| 3861 | /* We may need a copy reloc too. */ |
| 3862 | h->non_got_ref = 1; |
| 3863 | h->pointer_equality_needed = 1; |
| 3864 | } |
| 3865 | goto dodyn; |
| 3866 | |
| 3867 | case R_PPC_REL24: |
| 3868 | case R_PPC_REL14: |
| 3869 | case R_PPC_REL14_BRTAKEN: |
| 3870 | case R_PPC_REL14_BRNTAKEN: |
| 3871 | if (h == NULL) |
| 3872 | break; |
| 3873 | if (h == htab->elf.hgot) |
| 3874 | { |
| 3875 | if (htab->plt_type == PLT_UNSET) |
| 3876 | { |
| 3877 | htab->plt_type = PLT_OLD; |
| 3878 | htab->old_bfd = abfd; |
| 3879 | } |
| 3880 | break; |
| 3881 | } |
| 3882 | /* fall through */ |
| 3883 | |
| 3884 | case R_PPC_ADDR24: |
| 3885 | case R_PPC_ADDR14: |
| 3886 | case R_PPC_ADDR14_BRTAKEN: |
| 3887 | case R_PPC_ADDR14_BRNTAKEN: |
| 3888 | if (h != NULL && !info->shared) |
| 3889 | { |
| 3890 | /* We may need a plt entry if the symbol turns out to be |
| 3891 | a function defined in a dynamic object. */ |
| 3892 | h->needs_plt = 1; |
| 3893 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 3894 | return FALSE; |
| 3895 | break; |
| 3896 | } |
| 3897 | |
| 3898 | dodyn: |
| 3899 | /* If we are creating a shared library, and this is a reloc |
| 3900 | against a global symbol, or a non PC relative reloc |
| 3901 | against a local symbol, then we need to copy the reloc |
| 3902 | into the shared library. However, if we are linking with |
| 3903 | -Bsymbolic, we do not need to copy a reloc against a |
| 3904 | global symbol which is defined in an object we are |
| 3905 | including in the link (i.e., DEF_REGULAR is set). At |
| 3906 | this point we have not seen all the input files, so it is |
| 3907 | possible that DEF_REGULAR is not set now but will be set |
| 3908 | later (it is never cleared). In case of a weak definition, |
| 3909 | DEF_REGULAR may be cleared later by a strong definition in |
| 3910 | a shared library. We account for that possibility below by |
| 3911 | storing information in the dyn_relocs field of the hash |
| 3912 | table entry. A similar situation occurs when creating |
| 3913 | shared libraries and symbol visibility changes render the |
| 3914 | symbol local. |
| 3915 | |
| 3916 | If on the other hand, we are creating an executable, we |
| 3917 | may need to keep relocations for symbols satisfied by a |
| 3918 | dynamic library if we manage to avoid copy relocs for the |
| 3919 | symbol. */ |
| 3920 | if ((info->shared |
| 3921 | && (must_be_dyn_reloc (info, r_type) |
| 3922 | || (h != NULL |
| 3923 | && (! info->symbolic |
| 3924 | || h->root.type == bfd_link_hash_defweak |
| 3925 | || !h->def_regular)))) |
| 3926 | || (ELIMINATE_COPY_RELOCS |
| 3927 | && !info->shared |
| 3928 | && h != NULL |
| 3929 | && (h->root.type == bfd_link_hash_defweak |
| 3930 | || !h->def_regular))) |
| 3931 | { |
| 3932 | struct ppc_elf_dyn_relocs *p; |
| 3933 | struct ppc_elf_dyn_relocs **rel_head; |
| 3934 | |
| 3935 | #ifdef DEBUG |
| 3936 | fprintf (stderr, |
| 3937 | "ppc_elf_check_relocs needs to " |
| 3938 | "create relocation for %s\n", |
| 3939 | (h && h->root.root.string |
| 3940 | ? h->root.root.string : "<unknown>")); |
| 3941 | #endif |
| 3942 | if (sreloc == NULL) |
| 3943 | { |
| 3944 | if (htab->elf.dynobj == NULL) |
| 3945 | htab->elf.dynobj = abfd; |
| 3946 | |
| 3947 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 3948 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); |
| 3949 | |
| 3950 | if (sreloc == NULL) |
| 3951 | return FALSE; |
| 3952 | } |
| 3953 | |
| 3954 | /* If this is a global symbol, we count the number of |
| 3955 | relocations we need for this symbol. */ |
| 3956 | if (h != NULL) |
| 3957 | { |
| 3958 | rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; |
| 3959 | } |
| 3960 | else |
| 3961 | { |
| 3962 | /* Track dynamic relocs needed for local syms too. |
| 3963 | We really need local syms available to do this |
| 3964 | easily. Oh well. */ |
| 3965 | asection *s; |
| 3966 | void *vpp; |
| 3967 | Elf_Internal_Sym *isym; |
| 3968 | |
| 3969 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 3970 | abfd, r_symndx); |
| 3971 | if (isym == NULL) |
| 3972 | return FALSE; |
| 3973 | |
| 3974 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3975 | if (s == NULL) |
| 3976 | s = sec; |
| 3977 | |
| 3978 | vpp = &elf_section_data (s)->local_dynrel; |
| 3979 | rel_head = (struct ppc_elf_dyn_relocs **) vpp; |
| 3980 | } |
| 3981 | |
| 3982 | p = *rel_head; |
| 3983 | if (p == NULL || p->sec != sec) |
| 3984 | { |
| 3985 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 3986 | if (p == NULL) |
| 3987 | return FALSE; |
| 3988 | p->next = *rel_head; |
| 3989 | *rel_head = p; |
| 3990 | p->sec = sec; |
| 3991 | p->count = 0; |
| 3992 | p->pc_count = 0; |
| 3993 | } |
| 3994 | |
| 3995 | p->count += 1; |
| 3996 | if (!must_be_dyn_reloc (info, r_type)) |
| 3997 | p->pc_count += 1; |
| 3998 | } |
| 3999 | |
| 4000 | break; |
| 4001 | } |
| 4002 | } |
| 4003 | |
| 4004 | return TRUE; |
| 4005 | } |
| 4006 | \f |
| 4007 | |
| 4008 | /* Merge object attributes from IBFD into OBFD. Raise an error if |
| 4009 | there are conflicting attributes. */ |
| 4010 | static bfd_boolean |
| 4011 | ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) |
| 4012 | { |
| 4013 | obj_attribute *in_attr, *in_attrs; |
| 4014 | obj_attribute *out_attr, *out_attrs; |
| 4015 | |
| 4016 | if (!elf_known_obj_attributes_proc (obfd)[0].i) |
| 4017 | { |
| 4018 | /* This is the first object. Copy the attributes. */ |
| 4019 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 4020 | |
| 4021 | /* Use the Tag_null value to indicate the attributes have been |
| 4022 | initialized. */ |
| 4023 | elf_known_obj_attributes_proc (obfd)[0].i = 1; |
| 4024 | |
| 4025 | return TRUE; |
| 4026 | } |
| 4027 | |
| 4028 | in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
| 4029 | out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; |
| 4030 | |
| 4031 | /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge |
| 4032 | non-conflicting ones. */ |
| 4033 | in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; |
| 4034 | out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; |
| 4035 | if (in_attr->i != out_attr->i) |
| 4036 | { |
| 4037 | out_attr->type = 1; |
| 4038 | if (out_attr->i == 0) |
| 4039 | out_attr->i = in_attr->i; |
| 4040 | else if (in_attr->i == 0) |
| 4041 | ; |
| 4042 | else if (out_attr->i == 1 && in_attr->i == 2) |
| 4043 | _bfd_error_handler |
| 4044 | (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); |
| 4045 | else if (out_attr->i == 1 && in_attr->i == 3) |
| 4046 | _bfd_error_handler |
| 4047 | (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), |
| 4048 | obfd, ibfd); |
| 4049 | else if (out_attr->i == 3 && in_attr->i == 1) |
| 4050 | _bfd_error_handler |
| 4051 | (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), |
| 4052 | ibfd, obfd); |
| 4053 | else if (out_attr->i == 3 && in_attr->i == 2) |
| 4054 | _bfd_error_handler |
| 4055 | (_("Warning: %B uses soft float, %B uses single-precision hard float"), |
| 4056 | ibfd, obfd); |
| 4057 | else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) |
| 4058 | _bfd_error_handler |
| 4059 | (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); |
| 4060 | else if (in_attr->i > 3) |
| 4061 | _bfd_error_handler |
| 4062 | (_("Warning: %B uses unknown floating point ABI %d"), ibfd, |
| 4063 | in_attr->i); |
| 4064 | else |
| 4065 | _bfd_error_handler |
| 4066 | (_("Warning: %B uses unknown floating point ABI %d"), obfd, |
| 4067 | out_attr->i); |
| 4068 | } |
| 4069 | |
| 4070 | /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and |
| 4071 | merge non-conflicting ones. */ |
| 4072 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; |
| 4073 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; |
| 4074 | if (in_attr->i != out_attr->i) |
| 4075 | { |
| 4076 | const char *in_abi = NULL, *out_abi = NULL; |
| 4077 | |
| 4078 | switch (in_attr->i) |
| 4079 | { |
| 4080 | case 1: in_abi = "generic"; break; |
| 4081 | case 2: in_abi = "AltiVec"; break; |
| 4082 | case 3: in_abi = "SPE"; break; |
| 4083 | } |
| 4084 | |
| 4085 | switch (out_attr->i) |
| 4086 | { |
| 4087 | case 1: out_abi = "generic"; break; |
| 4088 | case 2: out_abi = "AltiVec"; break; |
| 4089 | case 3: out_abi = "SPE"; break; |
| 4090 | } |
| 4091 | |
| 4092 | out_attr->type = 1; |
| 4093 | if (out_attr->i == 0) |
| 4094 | out_attr->i = in_attr->i; |
| 4095 | else if (in_attr->i == 0) |
| 4096 | ; |
| 4097 | /* For now, allow generic to transition to AltiVec or SPE |
| 4098 | without a warning. If GCC marked files with their stack |
| 4099 | alignment and used don't-care markings for files which are |
| 4100 | not affected by the vector ABI, we could warn about this |
| 4101 | case too. */ |
| 4102 | else if (out_attr->i == 1) |
| 4103 | out_attr->i = in_attr->i; |
| 4104 | else if (in_attr->i == 1) |
| 4105 | ; |
| 4106 | else if (in_abi == NULL) |
| 4107 | _bfd_error_handler |
| 4108 | (_("Warning: %B uses unknown vector ABI %d"), ibfd, |
| 4109 | in_attr->i); |
| 4110 | else if (out_abi == NULL) |
| 4111 | _bfd_error_handler |
| 4112 | (_("Warning: %B uses unknown vector ABI %d"), obfd, |
| 4113 | in_attr->i); |
| 4114 | else |
| 4115 | _bfd_error_handler |
| 4116 | (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), |
| 4117 | ibfd, obfd, in_abi, out_abi); |
| 4118 | } |
| 4119 | |
| 4120 | /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes |
| 4121 | and merge non-conflicting ones. */ |
| 4122 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; |
| 4123 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; |
| 4124 | if (in_attr->i != out_attr->i) |
| 4125 | { |
| 4126 | out_attr->type = 1; |
| 4127 | if (out_attr->i == 0) |
| 4128 | out_attr->i = in_attr->i; |
| 4129 | else if (in_attr->i == 0) |
| 4130 | ; |
| 4131 | else if (out_attr->i == 1 && in_attr->i == 2) |
| 4132 | _bfd_error_handler |
| 4133 | (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); |
| 4134 | else if (out_attr->i == 2 && in_attr->i == 1) |
| 4135 | _bfd_error_handler |
| 4136 | (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); |
| 4137 | else if (in_attr->i > 2) |
| 4138 | _bfd_error_handler |
| 4139 | (_("Warning: %B uses unknown small structure return convention %d"), ibfd, |
| 4140 | in_attr->i); |
| 4141 | else |
| 4142 | _bfd_error_handler |
| 4143 | (_("Warning: %B uses unknown small structure return convention %d"), obfd, |
| 4144 | out_attr->i); |
| 4145 | } |
| 4146 | |
| 4147 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| 4148 | _bfd_elf_merge_object_attributes (ibfd, obfd); |
| 4149 | |
| 4150 | return TRUE; |
| 4151 | } |
| 4152 | |
| 4153 | /* Merge backend specific data from an object file to the output |
| 4154 | object file when linking. */ |
| 4155 | |
| 4156 | static bfd_boolean |
| 4157 | ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4158 | { |
| 4159 | flagword old_flags; |
| 4160 | flagword new_flags; |
| 4161 | bfd_boolean error; |
| 4162 | |
| 4163 | if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) |
| 4164 | return TRUE; |
| 4165 | |
| 4166 | /* Check if we have the same endianess. */ |
| 4167 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 4168 | return FALSE; |
| 4169 | |
| 4170 | if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) |
| 4171 | return FALSE; |
| 4172 | |
| 4173 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 4174 | old_flags = elf_elfheader (obfd)->e_flags; |
| 4175 | if (!elf_flags_init (obfd)) |
| 4176 | { |
| 4177 | /* First call, no flags set. */ |
| 4178 | elf_flags_init (obfd) = TRUE; |
| 4179 | elf_elfheader (obfd)->e_flags = new_flags; |
| 4180 | } |
| 4181 | |
| 4182 | /* Compatible flags are ok. */ |
| 4183 | else if (new_flags == old_flags) |
| 4184 | ; |
| 4185 | |
| 4186 | /* Incompatible flags. */ |
| 4187 | else |
| 4188 | { |
| 4189 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib |
| 4190 | to be linked with either. */ |
| 4191 | error = FALSE; |
| 4192 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 4193 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 4194 | { |
| 4195 | error = TRUE; |
| 4196 | (*_bfd_error_handler) |
| 4197 | (_("%B: compiled with -mrelocatable and linked with " |
| 4198 | "modules compiled normally"), ibfd); |
| 4199 | } |
| 4200 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 4201 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 4202 | { |
| 4203 | error = TRUE; |
| 4204 | (*_bfd_error_handler) |
| 4205 | (_("%B: compiled normally and linked with " |
| 4206 | "modules compiled with -mrelocatable"), ibfd); |
| 4207 | } |
| 4208 | |
| 4209 | /* The output is -mrelocatable-lib iff both the input files are. */ |
| 4210 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) |
| 4211 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 4212 | |
| 4213 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, |
| 4214 | but each input file is either -mrelocatable or -mrelocatable-lib. */ |
| 4215 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) |
| 4216 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) |
| 4217 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) |
| 4218 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; |
| 4219 | |
| 4220 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if |
| 4221 | any module uses it. */ |
| 4222 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 4223 | |
| 4224 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 4225 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 4226 | |
| 4227 | /* Warn about any other mismatches. */ |
| 4228 | if (new_flags != old_flags) |
| 4229 | { |
| 4230 | error = TRUE; |
| 4231 | (*_bfd_error_handler) |
| 4232 | (_("%B: uses different e_flags (0x%lx) fields " |
| 4233 | "than previous modules (0x%lx)"), |
| 4234 | ibfd, (long) new_flags, (long) old_flags); |
| 4235 | } |
| 4236 | |
| 4237 | if (error) |
| 4238 | { |
| 4239 | bfd_set_error (bfd_error_bad_value); |
| 4240 | return FALSE; |
| 4241 | } |
| 4242 | } |
| 4243 | |
| 4244 | return TRUE; |
| 4245 | } |
| 4246 | \f |
| 4247 | /* Choose which PLT scheme to use, and set .plt flags appropriately. |
| 4248 | Returns -1 on error, 0 for old PLT, 1 for new PLT. */ |
| 4249 | int |
| 4250 | ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4251 | struct bfd_link_info *info, |
| 4252 | enum ppc_elf_plt_type plt_style, |
| 4253 | int emit_stub_syms) |
| 4254 | { |
| 4255 | struct ppc_elf_link_hash_table *htab; |
| 4256 | flagword flags; |
| 4257 | |
| 4258 | htab = ppc_elf_hash_table (info); |
| 4259 | |
| 4260 | htab->emit_stub_syms = emit_stub_syms; |
| 4261 | |
| 4262 | if (htab->plt_type == PLT_UNSET) |
| 4263 | { |
| 4264 | if (plt_style == PLT_OLD) |
| 4265 | htab->plt_type = PLT_OLD; |
| 4266 | else |
| 4267 | { |
| 4268 | bfd *ibfd; |
| 4269 | enum ppc_elf_plt_type plt_type = plt_style; |
| 4270 | |
| 4271 | /* Look through the reloc flags left by ppc_elf_check_relocs. |
| 4272 | Use the old style bss plt if a file makes plt calls |
| 4273 | without using the new relocs, and if ld isn't given |
| 4274 | --secure-plt and we never see REL16 relocs. */ |
| 4275 | if (plt_type == PLT_UNSET) |
| 4276 | plt_type = PLT_OLD; |
| 4277 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 4278 | if (is_ppc_elf (ibfd)) |
| 4279 | { |
| 4280 | if (ppc_elf_tdata (ibfd)->has_rel16) |
| 4281 | plt_type = PLT_NEW; |
| 4282 | else if (ppc_elf_tdata (ibfd)->makes_plt_call) |
| 4283 | { |
| 4284 | plt_type = PLT_OLD; |
| 4285 | htab->old_bfd = ibfd; |
| 4286 | break; |
| 4287 | } |
| 4288 | } |
| 4289 | htab->plt_type = plt_type; |
| 4290 | } |
| 4291 | } |
| 4292 | if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW) |
| 4293 | info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd); |
| 4294 | |
| 4295 | BFD_ASSERT (htab->plt_type != PLT_VXWORKS); |
| 4296 | |
| 4297 | if (htab->plt_type == PLT_NEW) |
| 4298 | { |
| 4299 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 4300 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 4301 | |
| 4302 | /* The new PLT is a loaded section. */ |
| 4303 | if (htab->plt != NULL |
| 4304 | && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) |
| 4305 | return -1; |
| 4306 | |
| 4307 | /* The new GOT is not executable. */ |
| 4308 | if (htab->got != NULL |
| 4309 | && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) |
| 4310 | return -1; |
| 4311 | } |
| 4312 | else |
| 4313 | { |
| 4314 | /* Stop an unused .glink section from affecting .text alignment. */ |
| 4315 | if (htab->glink != NULL |
| 4316 | && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) |
| 4317 | return -1; |
| 4318 | } |
| 4319 | return htab->plt_type == PLT_NEW; |
| 4320 | } |
| 4321 | \f |
| 4322 | /* Return the section that should be marked against GC for a given |
| 4323 | relocation. */ |
| 4324 | |
| 4325 | static asection * |
| 4326 | ppc_elf_gc_mark_hook (asection *sec, |
| 4327 | struct bfd_link_info *info, |
| 4328 | Elf_Internal_Rela *rel, |
| 4329 | struct elf_link_hash_entry *h, |
| 4330 | Elf_Internal_Sym *sym) |
| 4331 | { |
| 4332 | if (h != NULL) |
| 4333 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4334 | { |
| 4335 | case R_PPC_GNU_VTINHERIT: |
| 4336 | case R_PPC_GNU_VTENTRY: |
| 4337 | return NULL; |
| 4338 | } |
| 4339 | |
| 4340 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 4341 | } |
| 4342 | |
| 4343 | /* Update the got, plt and dynamic reloc reference counts for the |
| 4344 | section being removed. */ |
| 4345 | |
| 4346 | static bfd_boolean |
| 4347 | ppc_elf_gc_sweep_hook (bfd *abfd, |
| 4348 | struct bfd_link_info *info, |
| 4349 | asection *sec, |
| 4350 | const Elf_Internal_Rela *relocs) |
| 4351 | { |
| 4352 | struct ppc_elf_link_hash_table *htab; |
| 4353 | Elf_Internal_Shdr *symtab_hdr; |
| 4354 | struct elf_link_hash_entry **sym_hashes; |
| 4355 | bfd_signed_vma *local_got_refcounts; |
| 4356 | const Elf_Internal_Rela *rel, *relend; |
| 4357 | asection *got2; |
| 4358 | |
| 4359 | if (info->relocatable) |
| 4360 | return TRUE; |
| 4361 | |
| 4362 | if ((sec->flags & SEC_ALLOC) == 0) |
| 4363 | return TRUE; |
| 4364 | |
| 4365 | elf_section_data (sec)->local_dynrel = NULL; |
| 4366 | |
| 4367 | htab = ppc_elf_hash_table (info); |
| 4368 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 4369 | sym_hashes = elf_sym_hashes (abfd); |
| 4370 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 4371 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 4372 | |
| 4373 | relend = relocs + sec->reloc_count; |
| 4374 | for (rel = relocs; rel < relend; rel++) |
| 4375 | { |
| 4376 | unsigned long r_symndx; |
| 4377 | enum elf_ppc_reloc_type r_type; |
| 4378 | struct elf_link_hash_entry *h = NULL; |
| 4379 | |
| 4380 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4381 | if (r_symndx >= symtab_hdr->sh_info) |
| 4382 | { |
| 4383 | struct ppc_elf_dyn_relocs **pp, *p; |
| 4384 | struct ppc_elf_link_hash_entry *eh; |
| 4385 | |
| 4386 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4387 | while (h->root.type == bfd_link_hash_indirect |
| 4388 | || h->root.type == bfd_link_hash_warning) |
| 4389 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4390 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 4391 | |
| 4392 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 4393 | if (p->sec == sec) |
| 4394 | { |
| 4395 | /* Everything must go for SEC. */ |
| 4396 | *pp = p->next; |
| 4397 | break; |
| 4398 | } |
| 4399 | } |
| 4400 | |
| 4401 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4402 | if (!htab->is_vxworks |
| 4403 | && h == NULL |
| 4404 | && local_got_refcounts != NULL |
| 4405 | && (!info->shared |
| 4406 | || is_branch_reloc (r_type))) |
| 4407 | { |
| 4408 | struct plt_entry **local_plt = (struct plt_entry **) |
| 4409 | (local_got_refcounts + symtab_hdr->sh_info); |
| 4410 | char *local_got_tls_masks = (char *) |
| 4411 | (local_plt + symtab_hdr->sh_info); |
| 4412 | if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) |
| 4413 | { |
| 4414 | struct plt_entry **ifunc = local_plt + r_symndx; |
| 4415 | bfd_vma addend = 0; |
| 4416 | struct plt_entry *ent; |
| 4417 | |
| 4418 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 4419 | addend = rel->r_addend; |
| 4420 | ent = find_plt_ent (ifunc, got2, addend); |
| 4421 | if (ent->plt.refcount > 0) |
| 4422 | ent->plt.refcount -= 1; |
| 4423 | continue; |
| 4424 | } |
| 4425 | } |
| 4426 | |
| 4427 | switch (r_type) |
| 4428 | { |
| 4429 | case R_PPC_GOT_TLSLD16: |
| 4430 | case R_PPC_GOT_TLSLD16_LO: |
| 4431 | case R_PPC_GOT_TLSLD16_HI: |
| 4432 | case R_PPC_GOT_TLSLD16_HA: |
| 4433 | case R_PPC_GOT_TLSGD16: |
| 4434 | case R_PPC_GOT_TLSGD16_LO: |
| 4435 | case R_PPC_GOT_TLSGD16_HI: |
| 4436 | case R_PPC_GOT_TLSGD16_HA: |
| 4437 | case R_PPC_GOT_TPREL16: |
| 4438 | case R_PPC_GOT_TPREL16_LO: |
| 4439 | case R_PPC_GOT_TPREL16_HI: |
| 4440 | case R_PPC_GOT_TPREL16_HA: |
| 4441 | case R_PPC_GOT_DTPREL16: |
| 4442 | case R_PPC_GOT_DTPREL16_LO: |
| 4443 | case R_PPC_GOT_DTPREL16_HI: |
| 4444 | case R_PPC_GOT_DTPREL16_HA: |
| 4445 | case R_PPC_GOT16: |
| 4446 | case R_PPC_GOT16_LO: |
| 4447 | case R_PPC_GOT16_HI: |
| 4448 | case R_PPC_GOT16_HA: |
| 4449 | if (h != NULL) |
| 4450 | { |
| 4451 | if (h->got.refcount > 0) |
| 4452 | h->got.refcount--; |
| 4453 | if (!info->shared) |
| 4454 | { |
| 4455 | struct plt_entry *ent; |
| 4456 | |
| 4457 | ent = find_plt_ent (&h->plt.plist, NULL, 0); |
| 4458 | if (ent != NULL && ent->plt.refcount > 0) |
| 4459 | ent->plt.refcount -= 1; |
| 4460 | } |
| 4461 | } |
| 4462 | else if (local_got_refcounts != NULL) |
| 4463 | { |
| 4464 | if (local_got_refcounts[r_symndx] > 0) |
| 4465 | local_got_refcounts[r_symndx]--; |
| 4466 | } |
| 4467 | break; |
| 4468 | |
| 4469 | case R_PPC_REL24: |
| 4470 | case R_PPC_REL14: |
| 4471 | case R_PPC_REL14_BRTAKEN: |
| 4472 | case R_PPC_REL14_BRNTAKEN: |
| 4473 | case R_PPC_REL32: |
| 4474 | if (h == NULL || h == htab->elf.hgot) |
| 4475 | break; |
| 4476 | /* Fall thru */ |
| 4477 | |
| 4478 | case R_PPC_ADDR32: |
| 4479 | case R_PPC_ADDR24: |
| 4480 | case R_PPC_ADDR16: |
| 4481 | case R_PPC_ADDR16_LO: |
| 4482 | case R_PPC_ADDR16_HI: |
| 4483 | case R_PPC_ADDR16_HA: |
| 4484 | case R_PPC_ADDR14: |
| 4485 | case R_PPC_ADDR14_BRTAKEN: |
| 4486 | case R_PPC_ADDR14_BRNTAKEN: |
| 4487 | case R_PPC_UADDR32: |
| 4488 | case R_PPC_UADDR16: |
| 4489 | if (info->shared) |
| 4490 | break; |
| 4491 | |
| 4492 | case R_PPC_PLT32: |
| 4493 | case R_PPC_PLTREL24: |
| 4494 | case R_PPC_PLTREL32: |
| 4495 | case R_PPC_PLT16_LO: |
| 4496 | case R_PPC_PLT16_HI: |
| 4497 | case R_PPC_PLT16_HA: |
| 4498 | if (h != NULL) |
| 4499 | { |
| 4500 | bfd_vma addend = 0; |
| 4501 | struct plt_entry *ent; |
| 4502 | |
| 4503 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 4504 | addend = rel->r_addend; |
| 4505 | ent = find_plt_ent (&h->plt.plist, got2, addend); |
| 4506 | if (ent != NULL && ent->plt.refcount > 0) |
| 4507 | ent->plt.refcount -= 1; |
| 4508 | } |
| 4509 | break; |
| 4510 | |
| 4511 | default: |
| 4512 | break; |
| 4513 | } |
| 4514 | } |
| 4515 | return TRUE; |
| 4516 | } |
| 4517 | \f |
| 4518 | /* Set plt output section type, htab->tls_get_addr, and call the |
| 4519 | generic ELF tls_setup function. */ |
| 4520 | |
| 4521 | asection * |
| 4522 | ppc_elf_tls_setup (bfd *obfd, |
| 4523 | struct bfd_link_info *info, |
| 4524 | int no_tls_get_addr_opt) |
| 4525 | { |
| 4526 | struct ppc_elf_link_hash_table *htab; |
| 4527 | |
| 4528 | htab = ppc_elf_hash_table (info); |
| 4529 | htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 4530 | FALSE, FALSE, TRUE); |
| 4531 | if (!no_tls_get_addr_opt) |
| 4532 | { |
| 4533 | struct elf_link_hash_entry *opt, *tga; |
| 4534 | opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", |
| 4535 | FALSE, FALSE, TRUE); |
| 4536 | if (opt != NULL |
| 4537 | && (opt->root.type == bfd_link_hash_defined |
| 4538 | || opt->root.type == bfd_link_hash_defweak)) |
| 4539 | { |
| 4540 | /* If glibc supports an optimized __tls_get_addr call stub, |
| 4541 | signalled by the presence of __tls_get_addr_opt, and we'll |
| 4542 | be calling __tls_get_addr via a plt call stub, then |
| 4543 | make __tls_get_addr point to __tls_get_addr_opt. */ |
| 4544 | tga = htab->tls_get_addr; |
| 4545 | if (htab->elf.dynamic_sections_created |
| 4546 | && tga != NULL |
| 4547 | && (tga->type == STT_FUNC |
| 4548 | || tga->needs_plt) |
| 4549 | && !(SYMBOL_CALLS_LOCAL (info, tga) |
| 4550 | || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT |
| 4551 | && tga->root.type == bfd_link_hash_undefweak))) |
| 4552 | { |
| 4553 | struct plt_entry *ent; |
| 4554 | for (ent = tga->plt.plist; ent != NULL; ent = ent->next) |
| 4555 | if (ent->plt.refcount > 0) |
| 4556 | break; |
| 4557 | if (ent != NULL) |
| 4558 | { |
| 4559 | tga->root.type = bfd_link_hash_indirect; |
| 4560 | tga->root.u.i.link = &opt->root; |
| 4561 | ppc_elf_copy_indirect_symbol (info, opt, tga); |
| 4562 | if (opt->dynindx != -1) |
| 4563 | { |
| 4564 | /* Use __tls_get_addr_opt in dynamic relocations. */ |
| 4565 | opt->dynindx = -1; |
| 4566 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 4567 | opt->dynstr_index); |
| 4568 | if (!bfd_elf_link_record_dynamic_symbol (info, opt)) |
| 4569 | return FALSE; |
| 4570 | } |
| 4571 | htab->tls_get_addr = opt; |
| 4572 | } |
| 4573 | } |
| 4574 | } |
| 4575 | else |
| 4576 | no_tls_get_addr_opt = TRUE; |
| 4577 | } |
| 4578 | htab->no_tls_get_addr_opt = no_tls_get_addr_opt; |
| 4579 | if (htab->plt_type == PLT_NEW |
| 4580 | && htab->plt != NULL |
| 4581 | && htab->plt->output_section != NULL) |
| 4582 | { |
| 4583 | elf_section_type (htab->plt->output_section) = SHT_PROGBITS; |
| 4584 | elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; |
| 4585 | } |
| 4586 | |
| 4587 | return _bfd_elf_tls_setup (obfd, info); |
| 4588 | } |
| 4589 | |
| 4590 | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
| 4591 | HASH. */ |
| 4592 | |
| 4593 | static bfd_boolean |
| 4594 | branch_reloc_hash_match (const bfd *ibfd, |
| 4595 | const Elf_Internal_Rela *rel, |
| 4596 | const struct elf_link_hash_entry *hash) |
| 4597 | { |
| 4598 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 4599 | enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); |
| 4600 | unsigned int r_symndx = ELF32_R_SYM (rel->r_info); |
| 4601 | |
| 4602 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
| 4603 | { |
| 4604 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 4605 | struct elf_link_hash_entry *h; |
| 4606 | |
| 4607 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4608 | while (h->root.type == bfd_link_hash_indirect |
| 4609 | || h->root.type == bfd_link_hash_warning) |
| 4610 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4611 | if (h == hash) |
| 4612 | return TRUE; |
| 4613 | } |
| 4614 | return FALSE; |
| 4615 | } |
| 4616 | |
| 4617 | /* Run through all the TLS relocs looking for optimization |
| 4618 | opportunities. */ |
| 4619 | |
| 4620 | bfd_boolean |
| 4621 | ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, |
| 4622 | struct bfd_link_info *info) |
| 4623 | { |
| 4624 | bfd *ibfd; |
| 4625 | asection *sec; |
| 4626 | struct ppc_elf_link_hash_table *htab; |
| 4627 | int pass; |
| 4628 | |
| 4629 | if (info->relocatable || !info->executable) |
| 4630 | return TRUE; |
| 4631 | |
| 4632 | htab = ppc_elf_hash_table (info); |
| 4633 | /* Make two passes through the relocs. First time check that tls |
| 4634 | relocs involved in setting up a tls_get_addr call are indeed |
| 4635 | followed by such a call. If they are not, exclude them from |
| 4636 | the optimizations done on the second pass. */ |
| 4637 | for (pass = 0; pass < 2; ++pass) |
| 4638 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 4639 | { |
| 4640 | Elf_Internal_Sym *locsyms = NULL; |
| 4641 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 4642 | asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); |
| 4643 | |
| 4644 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 4645 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| 4646 | { |
| 4647 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 4648 | |
| 4649 | /* Read the relocations. */ |
| 4650 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 4651 | info->keep_memory); |
| 4652 | if (relstart == NULL) |
| 4653 | return FALSE; |
| 4654 | |
| 4655 | relend = relstart + sec->reloc_count; |
| 4656 | for (rel = relstart; rel < relend; rel++) |
| 4657 | { |
| 4658 | enum elf_ppc_reloc_type r_type; |
| 4659 | unsigned long r_symndx; |
| 4660 | struct elf_link_hash_entry *h = NULL; |
| 4661 | char *tls_mask; |
| 4662 | char tls_set, tls_clear; |
| 4663 | bfd_boolean is_local; |
| 4664 | int expecting_tls_get_addr; |
| 4665 | bfd_signed_vma *got_count; |
| 4666 | |
| 4667 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4668 | if (r_symndx >= symtab_hdr->sh_info) |
| 4669 | { |
| 4670 | struct elf_link_hash_entry **sym_hashes; |
| 4671 | |
| 4672 | sym_hashes = elf_sym_hashes (ibfd); |
| 4673 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4674 | while (h->root.type == bfd_link_hash_indirect |
| 4675 | || h->root.type == bfd_link_hash_warning) |
| 4676 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4677 | } |
| 4678 | |
| 4679 | expecting_tls_get_addr = 0; |
| 4680 | is_local = FALSE; |
| 4681 | if (h == NULL |
| 4682 | || !h->def_dynamic) |
| 4683 | is_local = TRUE; |
| 4684 | |
| 4685 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4686 | switch (r_type) |
| 4687 | { |
| 4688 | case R_PPC_GOT_TLSLD16: |
| 4689 | case R_PPC_GOT_TLSLD16_LO: |
| 4690 | expecting_tls_get_addr = 1; |
| 4691 | /* Fall thru */ |
| 4692 | |
| 4693 | case R_PPC_GOT_TLSLD16_HI: |
| 4694 | case R_PPC_GOT_TLSLD16_HA: |
| 4695 | /* These relocs should never be against a symbol |
| 4696 | defined in a shared lib. Leave them alone if |
| 4697 | that turns out to be the case. */ |
| 4698 | if (!is_local) |
| 4699 | continue; |
| 4700 | |
| 4701 | /* LD -> LE */ |
| 4702 | tls_set = 0; |
| 4703 | tls_clear = TLS_LD; |
| 4704 | break; |
| 4705 | |
| 4706 | case R_PPC_GOT_TLSGD16: |
| 4707 | case R_PPC_GOT_TLSGD16_LO: |
| 4708 | expecting_tls_get_addr = 1; |
| 4709 | /* Fall thru */ |
| 4710 | |
| 4711 | case R_PPC_GOT_TLSGD16_HI: |
| 4712 | case R_PPC_GOT_TLSGD16_HA: |
| 4713 | if (is_local) |
| 4714 | /* GD -> LE */ |
| 4715 | tls_set = 0; |
| 4716 | else |
| 4717 | /* GD -> IE */ |
| 4718 | tls_set = TLS_TLS | TLS_TPRELGD; |
| 4719 | tls_clear = TLS_GD; |
| 4720 | break; |
| 4721 | |
| 4722 | case R_PPC_GOT_TPREL16: |
| 4723 | case R_PPC_GOT_TPREL16_LO: |
| 4724 | case R_PPC_GOT_TPREL16_HI: |
| 4725 | case R_PPC_GOT_TPREL16_HA: |
| 4726 | if (is_local) |
| 4727 | { |
| 4728 | /* IE -> LE */ |
| 4729 | tls_set = 0; |
| 4730 | tls_clear = TLS_TPREL; |
| 4731 | break; |
| 4732 | } |
| 4733 | else |
| 4734 | continue; |
| 4735 | |
| 4736 | case R_PPC_TLSGD: |
| 4737 | case R_PPC_TLSLD: |
| 4738 | expecting_tls_get_addr = 2; |
| 4739 | tls_set = 0; |
| 4740 | tls_clear = 0; |
| 4741 | break; |
| 4742 | |
| 4743 | default: |
| 4744 | continue; |
| 4745 | } |
| 4746 | |
| 4747 | if (pass == 0) |
| 4748 | { |
| 4749 | if (!expecting_tls_get_addr |
| 4750 | || (expecting_tls_get_addr == 1 |
| 4751 | && !sec->has_tls_get_addr_call)) |
| 4752 | continue; |
| 4753 | |
| 4754 | if (rel + 1 < relend |
| 4755 | && branch_reloc_hash_match (ibfd, rel + 1, |
| 4756 | htab->tls_get_addr)) |
| 4757 | continue; |
| 4758 | |
| 4759 | /* Uh oh, we didn't find the expected call. We |
| 4760 | could just mark this symbol to exclude it |
| 4761 | from tls optimization but it's safer to skip |
| 4762 | the entire section. */ |
| 4763 | sec->has_tls_reloc = 0; |
| 4764 | break; |
| 4765 | } |
| 4766 | |
| 4767 | if (expecting_tls_get_addr) |
| 4768 | { |
| 4769 | struct plt_entry *ent; |
| 4770 | bfd_vma addend = 0; |
| 4771 | |
| 4772 | if (info->shared |
| 4773 | && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) |
| 4774 | addend = rel[1].r_addend; |
| 4775 | ent = find_plt_ent (&htab->tls_get_addr->plt.plist, |
| 4776 | got2, addend); |
| 4777 | if (ent != NULL && ent->plt.refcount > 0) |
| 4778 | ent->plt.refcount -= 1; |
| 4779 | |
| 4780 | if (expecting_tls_get_addr == 2) |
| 4781 | continue; |
| 4782 | } |
| 4783 | |
| 4784 | if (h != NULL) |
| 4785 | { |
| 4786 | tls_mask = &ppc_elf_hash_entry (h)->tls_mask; |
| 4787 | got_count = &h->got.refcount; |
| 4788 | } |
| 4789 | else |
| 4790 | { |
| 4791 | bfd_signed_vma *lgot_refs; |
| 4792 | struct plt_entry **local_plt; |
| 4793 | char *lgot_masks; |
| 4794 | |
| 4795 | if (locsyms == NULL) |
| 4796 | { |
| 4797 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 4798 | if (locsyms == NULL) |
| 4799 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 4800 | symtab_hdr->sh_info, |
| 4801 | 0, NULL, NULL, NULL); |
| 4802 | if (locsyms == NULL) |
| 4803 | { |
| 4804 | if (elf_section_data (sec)->relocs != relstart) |
| 4805 | free (relstart); |
| 4806 | return FALSE; |
| 4807 | } |
| 4808 | } |
| 4809 | lgot_refs = elf_local_got_refcounts (ibfd); |
| 4810 | if (lgot_refs == NULL) |
| 4811 | abort (); |
| 4812 | local_plt = (struct plt_entry **) |
| 4813 | (lgot_refs + symtab_hdr->sh_info); |
| 4814 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 4815 | tls_mask = &lgot_masks[r_symndx]; |
| 4816 | got_count = &lgot_refs[r_symndx]; |
| 4817 | } |
| 4818 | |
| 4819 | if (tls_set == 0) |
| 4820 | { |
| 4821 | /* We managed to get rid of a got entry. */ |
| 4822 | if (*got_count > 0) |
| 4823 | *got_count -= 1; |
| 4824 | } |
| 4825 | |
| 4826 | *tls_mask |= tls_set; |
| 4827 | *tls_mask &= ~tls_clear; |
| 4828 | } |
| 4829 | |
| 4830 | if (elf_section_data (sec)->relocs != relstart) |
| 4831 | free (relstart); |
| 4832 | } |
| 4833 | |
| 4834 | if (locsyms != NULL |
| 4835 | && (symtab_hdr->contents != (unsigned char *) locsyms)) |
| 4836 | { |
| 4837 | if (!info->keep_memory) |
| 4838 | free (locsyms); |
| 4839 | else |
| 4840 | symtab_hdr->contents = (unsigned char *) locsyms; |
| 4841 | } |
| 4842 | } |
| 4843 | return TRUE; |
| 4844 | } |
| 4845 | \f |
| 4846 | /* Return true if we have dynamic relocs that apply to read-only sections. */ |
| 4847 | |
| 4848 | static bfd_boolean |
| 4849 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 4850 | { |
| 4851 | struct ppc_elf_dyn_relocs *p; |
| 4852 | |
| 4853 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 4854 | { |
| 4855 | asection *s = p->sec->output_section; |
| 4856 | |
| 4857 | if (s != NULL |
| 4858 | && ((s->flags & (SEC_READONLY | SEC_ALLOC)) |
| 4859 | == (SEC_READONLY | SEC_ALLOC))) |
| 4860 | return TRUE; |
| 4861 | } |
| 4862 | return FALSE; |
| 4863 | } |
| 4864 | |
| 4865 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 4866 | regular object. The current definition is in some section of the |
| 4867 | dynamic object, but we're not including those sections. We have to |
| 4868 | change the definition to something the rest of the link can |
| 4869 | understand. */ |
| 4870 | |
| 4871 | static bfd_boolean |
| 4872 | ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 4873 | struct elf_link_hash_entry *h) |
| 4874 | { |
| 4875 | struct ppc_elf_link_hash_table *htab; |
| 4876 | asection *s; |
| 4877 | |
| 4878 | #ifdef DEBUG |
| 4879 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", |
| 4880 | h->root.root.string); |
| 4881 | #endif |
| 4882 | |
| 4883 | /* Make sure we know what is going on here. */ |
| 4884 | htab = ppc_elf_hash_table (info); |
| 4885 | BFD_ASSERT (htab->elf.dynobj != NULL |
| 4886 | && (h->needs_plt |
| 4887 | || h->type == STT_GNU_IFUNC |
| 4888 | || h->u.weakdef != NULL |
| 4889 | || (h->def_dynamic |
| 4890 | && h->ref_regular |
| 4891 | && !h->def_regular))); |
| 4892 | |
| 4893 | /* Deal with function syms. */ |
| 4894 | if (h->type == STT_FUNC |
| 4895 | || h->type == STT_GNU_IFUNC |
| 4896 | || h->needs_plt) |
| 4897 | { |
| 4898 | /* Clear procedure linkage table information for any symbol that |
| 4899 | won't need a .plt entry. */ |
| 4900 | struct plt_entry *ent; |
| 4901 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 4902 | if (ent->plt.refcount > 0) |
| 4903 | break; |
| 4904 | if (ent == NULL |
| 4905 | || (h->type != STT_GNU_IFUNC |
| 4906 | && (SYMBOL_CALLS_LOCAL (info, h) |
| 4907 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 4908 | && h->root.type == bfd_link_hash_undefweak)))) |
| 4909 | { |
| 4910 | /* A PLT entry is not required/allowed when: |
| 4911 | |
| 4912 | 1. We are not using ld.so; because then the PLT entry |
| 4913 | can't be set up, so we can't use one. In this case, |
| 4914 | ppc_elf_adjust_dynamic_symbol won't even be called. |
| 4915 | |
| 4916 | 2. GC has rendered the entry unused. |
| 4917 | |
| 4918 | 3. We know for certain that a call to this symbol |
| 4919 | will go to this object, or will remain undefined. */ |
| 4920 | h->plt.plist = NULL; |
| 4921 | h->needs_plt = 0; |
| 4922 | } |
| 4923 | else |
| 4924 | { |
| 4925 | /* After adjust_dynamic_symbol, non_got_ref set in the |
| 4926 | non-shared case means that we have allocated space in |
| 4927 | .dynbss for the symbol and thus dyn_relocs for this |
| 4928 | symbol should be discarded. |
| 4929 | If we get here we know we are making a PLT entry for this |
| 4930 | symbol, and in an executable we'd normally resolve |
| 4931 | relocations against this symbol to the PLT entry. Allow |
| 4932 | dynamic relocs if the reference is weak, and the dynamic |
| 4933 | relocs will not cause text relocation. */ |
| 4934 | if (!h->ref_regular_nonweak |
| 4935 | && h->non_got_ref |
| 4936 | && h->type != STT_GNU_IFUNC |
| 4937 | && !htab->is_vxworks |
| 4938 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 4939 | && !readonly_dynrelocs (h)) |
| 4940 | h->non_got_ref = 0; |
| 4941 | } |
| 4942 | return TRUE; |
| 4943 | } |
| 4944 | else |
| 4945 | h->plt.plist = NULL; |
| 4946 | |
| 4947 | /* If this is a weak symbol, and there is a real definition, the |
| 4948 | processor independent code will have arranged for us to see the |
| 4949 | real definition first, and we can just use the same value. */ |
| 4950 | if (h->u.weakdef != NULL) |
| 4951 | { |
| 4952 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 4953 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 4954 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 4955 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 4956 | if (ELIMINATE_COPY_RELOCS) |
| 4957 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 4958 | return TRUE; |
| 4959 | } |
| 4960 | |
| 4961 | /* This is a reference to a symbol defined by a dynamic object which |
| 4962 | is not a function. */ |
| 4963 | |
| 4964 | /* If we are creating a shared library, we must presume that the |
| 4965 | only references to the symbol are via the global offset table. |
| 4966 | For such cases we need not do anything here; the relocations will |
| 4967 | be handled correctly by relocate_section. */ |
| 4968 | if (info->shared) |
| 4969 | return TRUE; |
| 4970 | |
| 4971 | /* If there are no references to this symbol that do not use the |
| 4972 | GOT, we don't need to generate a copy reloc. */ |
| 4973 | if (!h->non_got_ref) |
| 4974 | return TRUE; |
| 4975 | |
| 4976 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 4977 | we'll be keeping the dynamic relocs and avoiding the copy reloc. |
| 4978 | We can't do this if there are any small data relocations. This |
| 4979 | doesn't work on VxWorks, where we can not have dynamic |
| 4980 | relocations (other than copy and jump slot relocations) in an |
| 4981 | executable. */ |
| 4982 | if (ELIMINATE_COPY_RELOCS |
| 4983 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 4984 | && !htab->is_vxworks |
| 4985 | && !h->def_regular |
| 4986 | && !readonly_dynrelocs (h)) |
| 4987 | { |
| 4988 | h->non_got_ref = 0; |
| 4989 | return TRUE; |
| 4990 | } |
| 4991 | |
| 4992 | if (h->size == 0) |
| 4993 | { |
| 4994 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| 4995 | h->root.root.string); |
| 4996 | return TRUE; |
| 4997 | } |
| 4998 | |
| 4999 | /* We must allocate the symbol in our .dynbss section, which will |
| 5000 | become part of the .bss section of the executable. There will be |
| 5001 | an entry for this symbol in the .dynsym section. The dynamic |
| 5002 | object will contain position independent code, so all references |
| 5003 | from the dynamic object to this symbol will go through the global |
| 5004 | offset table. The dynamic linker will use the .dynsym entry to |
| 5005 | determine the address it must put in the global offset table, so |
| 5006 | both the dynamic object and the regular object will refer to the |
| 5007 | same memory location for the variable. |
| 5008 | |
| 5009 | Of course, if the symbol is referenced using SDAREL relocs, we |
| 5010 | must instead allocate it in .sbss. */ |
| 5011 | |
| 5012 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 5013 | s = htab->dynsbss; |
| 5014 | else |
| 5015 | s = htab->dynbss; |
| 5016 | BFD_ASSERT (s != NULL); |
| 5017 | |
| 5018 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 5019 | copy the initial value out of the dynamic object and into the |
| 5020 | runtime process image. We need to remember the offset into the |
| 5021 | .rela.bss section we are going to use. */ |
| 5022 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 5023 | { |
| 5024 | asection *srel; |
| 5025 | |
| 5026 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 5027 | srel = htab->relsbss; |
| 5028 | else |
| 5029 | srel = htab->relbss; |
| 5030 | BFD_ASSERT (srel != NULL); |
| 5031 | srel->size += sizeof (Elf32_External_Rela); |
| 5032 | h->needs_copy = 1; |
| 5033 | } |
| 5034 | |
| 5035 | return _bfd_elf_adjust_dynamic_copy (h, s); |
| 5036 | } |
| 5037 | \f |
| 5038 | /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is |
| 5039 | xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, |
| 5040 | specifying the addend on the plt relocation. For -fpic code, the sym |
| 5041 | is xxxxxxxx.plt_pic32.<callee>, and for -fPIC |
| 5042 | xxxxxxxx.got2.plt_pic32.<callee>. */ |
| 5043 | |
| 5044 | static bfd_boolean |
| 5045 | add_stub_sym (struct plt_entry *ent, |
| 5046 | struct elf_link_hash_entry *h, |
| 5047 | struct bfd_link_info *info) |
| 5048 | { |
| 5049 | struct elf_link_hash_entry *sh; |
| 5050 | size_t len1, len2, len3; |
| 5051 | char *name; |
| 5052 | const char *stub; |
| 5053 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 5054 | |
| 5055 | if (info->shared) |
| 5056 | stub = ".plt_pic32."; |
| 5057 | else |
| 5058 | stub = ".plt_call32."; |
| 5059 | |
| 5060 | len1 = strlen (h->root.root.string); |
| 5061 | len2 = strlen (stub); |
| 5062 | len3 = 0; |
| 5063 | if (ent->sec) |
| 5064 | len3 = strlen (ent->sec->name); |
| 5065 | name = bfd_malloc (len1 + len2 + len3 + 9); |
| 5066 | if (name == NULL) |
| 5067 | return FALSE; |
| 5068 | sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); |
| 5069 | if (ent->sec) |
| 5070 | memcpy (name + 8, ent->sec->name, len3); |
| 5071 | memcpy (name + 8 + len3, stub, len2); |
| 5072 | memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); |
| 5073 | sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 5074 | if (sh == NULL) |
| 5075 | return FALSE; |
| 5076 | if (sh->root.type == bfd_link_hash_new) |
| 5077 | { |
| 5078 | sh->root.type = bfd_link_hash_defined; |
| 5079 | sh->root.u.def.section = htab->glink; |
| 5080 | sh->root.u.def.value = ent->glink_offset; |
| 5081 | sh->ref_regular = 1; |
| 5082 | sh->def_regular = 1; |
| 5083 | sh->ref_regular_nonweak = 1; |
| 5084 | sh->forced_local = 1; |
| 5085 | sh->non_elf = 0; |
| 5086 | } |
| 5087 | return TRUE; |
| 5088 | } |
| 5089 | |
| 5090 | /* Allocate NEED contiguous space in .got, and return the offset. |
| 5091 | Handles allocation of the got header when crossing 32k. */ |
| 5092 | |
| 5093 | static bfd_vma |
| 5094 | allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) |
| 5095 | { |
| 5096 | bfd_vma where; |
| 5097 | unsigned int max_before_header; |
| 5098 | |
| 5099 | if (htab->plt_type == PLT_VXWORKS) |
| 5100 | { |
| 5101 | where = htab->got->size; |
| 5102 | htab->got->size += need; |
| 5103 | } |
| 5104 | else |
| 5105 | { |
| 5106 | max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; |
| 5107 | if (need <= htab->got_gap) |
| 5108 | { |
| 5109 | where = max_before_header - htab->got_gap; |
| 5110 | htab->got_gap -= need; |
| 5111 | } |
| 5112 | else |
| 5113 | { |
| 5114 | if (htab->got->size + need > max_before_header |
| 5115 | && htab->got->size <= max_before_header) |
| 5116 | { |
| 5117 | htab->got_gap = max_before_header - htab->got->size; |
| 5118 | htab->got->size = max_before_header + htab->got_header_size; |
| 5119 | } |
| 5120 | where = htab->got->size; |
| 5121 | htab->got->size += need; |
| 5122 | } |
| 5123 | } |
| 5124 | return where; |
| 5125 | } |
| 5126 | |
| 5127 | /* Allocate space in associated reloc sections for dynamic relocs. */ |
| 5128 | |
| 5129 | static bfd_boolean |
| 5130 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 5131 | { |
| 5132 | struct bfd_link_info *info = inf; |
| 5133 | struct ppc_elf_link_hash_entry *eh; |
| 5134 | struct ppc_elf_link_hash_table *htab; |
| 5135 | struct ppc_elf_dyn_relocs *p; |
| 5136 | |
| 5137 | if (h->root.type == bfd_link_hash_indirect) |
| 5138 | return TRUE; |
| 5139 | |
| 5140 | if (h->root.type == bfd_link_hash_warning) |
| 5141 | /* When warning symbols are created, they **replace** the "real" |
| 5142 | entry in the hash table, thus we never get to see the real |
| 5143 | symbol in a hash traversal. So look at it now. */ |
| 5144 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5145 | |
| 5146 | htab = ppc_elf_hash_table (info); |
| 5147 | if (htab->elf.dynamic_sections_created |
| 5148 | || h->type == STT_GNU_IFUNC) |
| 5149 | { |
| 5150 | struct plt_entry *ent; |
| 5151 | bfd_boolean doneone = FALSE; |
| 5152 | bfd_vma plt_offset = 0, glink_offset = 0; |
| 5153 | bfd_boolean dyn; |
| 5154 | |
| 5155 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 5156 | if (ent->plt.refcount > 0) |
| 5157 | { |
| 5158 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5159 | if (h->dynindx == -1 |
| 5160 | && !h->forced_local |
| 5161 | && !h->def_regular |
| 5162 | && htab->elf.dynamic_sections_created) |
| 5163 | { |
| 5164 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5165 | return FALSE; |
| 5166 | } |
| 5167 | |
| 5168 | dyn = htab->elf.dynamic_sections_created; |
| 5169 | if (info->shared |
| 5170 | || h->type == STT_GNU_IFUNC |
| 5171 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) |
| 5172 | { |
| 5173 | asection *s = htab->plt; |
| 5174 | if (!dyn || h->dynindx == -1) |
| 5175 | s = htab->iplt; |
| 5176 | |
| 5177 | if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) |
| 5178 | { |
| 5179 | if (!doneone) |
| 5180 | { |
| 5181 | plt_offset = s->size; |
| 5182 | s->size += 4; |
| 5183 | } |
| 5184 | ent->plt.offset = plt_offset; |
| 5185 | |
| 5186 | s = htab->glink; |
| 5187 | if (!doneone || info->shared) |
| 5188 | { |
| 5189 | glink_offset = s->size; |
| 5190 | s->size += GLINK_ENTRY_SIZE; |
| 5191 | if (h == htab->tls_get_addr |
| 5192 | && !htab->no_tls_get_addr_opt) |
| 5193 | s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; |
| 5194 | } |
| 5195 | if (!doneone |
| 5196 | && !info->shared |
| 5197 | && h->def_dynamic |
| 5198 | && !h->def_regular) |
| 5199 | { |
| 5200 | h->root.u.def.section = s; |
| 5201 | h->root.u.def.value = glink_offset; |
| 5202 | } |
| 5203 | ent->glink_offset = glink_offset; |
| 5204 | |
| 5205 | if (htab->emit_stub_syms |
| 5206 | && !add_stub_sym (ent, h, info)) |
| 5207 | return FALSE; |
| 5208 | } |
| 5209 | else |
| 5210 | { |
| 5211 | if (!doneone) |
| 5212 | { |
| 5213 | /* If this is the first .plt entry, make room |
| 5214 | for the special first entry. */ |
| 5215 | if (s->size == 0) |
| 5216 | s->size += htab->plt_initial_entry_size; |
| 5217 | |
| 5218 | /* The PowerPC PLT is actually composed of two |
| 5219 | parts, the first part is 2 words (for a load |
| 5220 | and a jump), and then there is a remaining |
| 5221 | word available at the end. */ |
| 5222 | plt_offset = (htab->plt_initial_entry_size |
| 5223 | + (htab->plt_slot_size |
| 5224 | * ((s->size |
| 5225 | - htab->plt_initial_entry_size) |
| 5226 | / htab->plt_entry_size))); |
| 5227 | |
| 5228 | /* If this symbol is not defined in a regular |
| 5229 | file, and we are not generating a shared |
| 5230 | library, then set the symbol to this location |
| 5231 | in the .plt. This is to avoid text |
| 5232 | relocations, and is required to make |
| 5233 | function pointers compare as equal between |
| 5234 | the normal executable and the shared library. */ |
| 5235 | if (! info->shared |
| 5236 | && h->def_dynamic |
| 5237 | && !h->def_regular) |
| 5238 | { |
| 5239 | h->root.u.def.section = s; |
| 5240 | h->root.u.def.value = plt_offset; |
| 5241 | } |
| 5242 | |
| 5243 | /* Make room for this entry. */ |
| 5244 | s->size += htab->plt_entry_size; |
| 5245 | /* After the 8192nd entry, room for two entries |
| 5246 | is allocated. */ |
| 5247 | if (htab->plt_type == PLT_OLD |
| 5248 | && (s->size - htab->plt_initial_entry_size) |
| 5249 | / htab->plt_entry_size |
| 5250 | > PLT_NUM_SINGLE_ENTRIES) |
| 5251 | s->size += htab->plt_entry_size; |
| 5252 | } |
| 5253 | ent->plt.offset = plt_offset; |
| 5254 | } |
| 5255 | |
| 5256 | /* We also need to make an entry in the .rela.plt section. */ |
| 5257 | if (!doneone) |
| 5258 | { |
| 5259 | if (!htab->elf.dynamic_sections_created |
| 5260 | || h->dynindx == -1) |
| 5261 | htab->reliplt->size += sizeof (Elf32_External_Rela); |
| 5262 | else |
| 5263 | { |
| 5264 | htab->relplt->size += sizeof (Elf32_External_Rela); |
| 5265 | |
| 5266 | if (htab->plt_type == PLT_VXWORKS) |
| 5267 | { |
| 5268 | /* Allocate space for the unloaded relocations. */ |
| 5269 | if (!info->shared |
| 5270 | && htab->elf.dynamic_sections_created) |
| 5271 | { |
| 5272 | if (ent->plt.offset |
| 5273 | == (bfd_vma) htab->plt_initial_entry_size) |
| 5274 | { |
| 5275 | htab->srelplt2->size |
| 5276 | += (sizeof (Elf32_External_Rela) |
| 5277 | * VXWORKS_PLTRESOLVE_RELOCS); |
| 5278 | } |
| 5279 | |
| 5280 | htab->srelplt2->size |
| 5281 | += (sizeof (Elf32_External_Rela) |
| 5282 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); |
| 5283 | } |
| 5284 | |
| 5285 | /* Every PLT entry has an associated GOT entry in |
| 5286 | .got.plt. */ |
| 5287 | htab->sgotplt->size += 4; |
| 5288 | } |
| 5289 | } |
| 5290 | doneone = TRUE; |
| 5291 | } |
| 5292 | } |
| 5293 | else |
| 5294 | ent->plt.offset = (bfd_vma) -1; |
| 5295 | } |
| 5296 | else |
| 5297 | ent->plt.offset = (bfd_vma) -1; |
| 5298 | |
| 5299 | if (!doneone) |
| 5300 | { |
| 5301 | h->plt.plist = NULL; |
| 5302 | h->needs_plt = 0; |
| 5303 | } |
| 5304 | } |
| 5305 | else |
| 5306 | { |
| 5307 | h->plt.plist = NULL; |
| 5308 | h->needs_plt = 0; |
| 5309 | } |
| 5310 | |
| 5311 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 5312 | if (eh->elf.got.refcount > 0) |
| 5313 | { |
| 5314 | bfd_boolean dyn; |
| 5315 | unsigned int need; |
| 5316 | |
| 5317 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5318 | if (eh->elf.dynindx == -1 |
| 5319 | && !eh->elf.forced_local |
| 5320 | && eh->elf.type != STT_GNU_IFUNC |
| 5321 | && htab->elf.dynamic_sections_created) |
| 5322 | { |
| 5323 | if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) |
| 5324 | return FALSE; |
| 5325 | } |
| 5326 | |
| 5327 | need = 0; |
| 5328 | if ((eh->tls_mask & TLS_TLS) != 0) |
| 5329 | { |
| 5330 | if ((eh->tls_mask & TLS_LD) != 0) |
| 5331 | { |
| 5332 | if (!eh->elf.def_dynamic) |
| 5333 | /* We'll just use htab->tlsld_got.offset. This should |
| 5334 | always be the case. It's a little odd if we have |
| 5335 | a local dynamic reloc against a non-local symbol. */ |
| 5336 | htab->tlsld_got.refcount += 1; |
| 5337 | else |
| 5338 | need += 8; |
| 5339 | } |
| 5340 | if ((eh->tls_mask & TLS_GD) != 0) |
| 5341 | need += 8; |
| 5342 | if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 5343 | need += 4; |
| 5344 | if ((eh->tls_mask & TLS_DTPREL) != 0) |
| 5345 | need += 4; |
| 5346 | } |
| 5347 | else |
| 5348 | need += 4; |
| 5349 | if (need == 0) |
| 5350 | eh->elf.got.offset = (bfd_vma) -1; |
| 5351 | else |
| 5352 | { |
| 5353 | eh->elf.got.offset = allocate_got (htab, need); |
| 5354 | dyn = htab->elf.dynamic_sections_created; |
| 5355 | if ((info->shared |
| 5356 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) |
| 5357 | && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT |
| 5358 | || eh->elf.root.type != bfd_link_hash_undefweak)) |
| 5359 | { |
| 5360 | asection *rsec = htab->relgot; |
| 5361 | /* All the entries we allocated need relocs. |
| 5362 | Except LD only needs one. */ |
| 5363 | if ((eh->tls_mask & TLS_LD) != 0 |
| 5364 | && eh->elf.def_dynamic) |
| 5365 | need -= 4; |
| 5366 | rsec->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 5367 | } |
| 5368 | } |
| 5369 | } |
| 5370 | else |
| 5371 | eh->elf.got.offset = (bfd_vma) -1; |
| 5372 | |
| 5373 | if (eh->dyn_relocs == NULL |
| 5374 | || !htab->elf.dynamic_sections_created) |
| 5375 | return TRUE; |
| 5376 | |
| 5377 | /* In the shared -Bsymbolic case, discard space allocated for |
| 5378 | dynamic pc-relative relocs against symbols which turn out to be |
| 5379 | defined in regular objects. For the normal shared case, discard |
| 5380 | space for relocs that have become local due to symbol visibility |
| 5381 | changes. */ |
| 5382 | |
| 5383 | if (info->shared) |
| 5384 | { |
| 5385 | /* Relocs that use pc_count are those that appear on a call insn, |
| 5386 | or certain REL relocs (see must_be_dyn_reloc) that can be |
| 5387 | generated via assembly. We want calls to protected symbols to |
| 5388 | resolve directly to the function rather than going via the plt. |
| 5389 | If people want function pointer comparisons to work as expected |
| 5390 | then they should avoid writing weird assembly. */ |
| 5391 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 5392 | { |
| 5393 | struct ppc_elf_dyn_relocs **pp; |
| 5394 | |
| 5395 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 5396 | { |
| 5397 | p->count -= p->pc_count; |
| 5398 | p->pc_count = 0; |
| 5399 | if (p->count == 0) |
| 5400 | *pp = p->next; |
| 5401 | else |
| 5402 | pp = &p->next; |
| 5403 | } |
| 5404 | } |
| 5405 | |
| 5406 | if (htab->is_vxworks) |
| 5407 | { |
| 5408 | struct ppc_elf_dyn_relocs **pp; |
| 5409 | |
| 5410 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 5411 | { |
| 5412 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) |
| 5413 | *pp = p->next; |
| 5414 | else |
| 5415 | pp = &p->next; |
| 5416 | } |
| 5417 | } |
| 5418 | |
| 5419 | /* Discard relocs on undefined symbols that must be local. */ |
| 5420 | if (eh->dyn_relocs != NULL |
| 5421 | && h->root.type == bfd_link_hash_undefined |
| 5422 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN |
| 5423 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) |
| 5424 | eh->dyn_relocs = NULL; |
| 5425 | |
| 5426 | /* Also discard relocs on undefined weak syms with non-default |
| 5427 | visibility. */ |
| 5428 | if (eh->dyn_relocs != NULL |
| 5429 | && h->root.type == bfd_link_hash_undefweak) |
| 5430 | { |
| 5431 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 5432 | eh->dyn_relocs = NULL; |
| 5433 | |
| 5434 | /* Make sure undefined weak symbols are output as a dynamic |
| 5435 | symbol in PIEs. */ |
| 5436 | else if (h->dynindx == -1 |
| 5437 | && !h->forced_local |
| 5438 | && !h->def_regular) |
| 5439 | { |
| 5440 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5441 | return FALSE; |
| 5442 | } |
| 5443 | } |
| 5444 | } |
| 5445 | else if (ELIMINATE_COPY_RELOCS) |
| 5446 | { |
| 5447 | /* For the non-shared case, discard space for relocs against |
| 5448 | symbols which turn out to need copy relocs or are not |
| 5449 | dynamic. */ |
| 5450 | |
| 5451 | if (!h->non_got_ref |
| 5452 | && !h->def_regular) |
| 5453 | { |
| 5454 | /* Make sure this symbol is output as a dynamic symbol. |
| 5455 | Undefined weak syms won't yet be marked as dynamic. */ |
| 5456 | if (h->dynindx == -1 |
| 5457 | && !h->forced_local) |
| 5458 | { |
| 5459 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5460 | return FALSE; |
| 5461 | } |
| 5462 | |
| 5463 | /* If that succeeded, we know we'll be keeping all the |
| 5464 | relocs. */ |
| 5465 | if (h->dynindx != -1) |
| 5466 | goto keep; |
| 5467 | } |
| 5468 | |
| 5469 | eh->dyn_relocs = NULL; |
| 5470 | |
| 5471 | keep: ; |
| 5472 | } |
| 5473 | |
| 5474 | /* Finally, allocate space. */ |
| 5475 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 5476 | { |
| 5477 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 5478 | if (!htab->elf.dynamic_sections_created) |
| 5479 | sreloc = htab->reliplt; |
| 5480 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 5481 | } |
| 5482 | |
| 5483 | return TRUE; |
| 5484 | } |
| 5485 | |
| 5486 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 5487 | read-only sections. */ |
| 5488 | |
| 5489 | static bfd_boolean |
| 5490 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info) |
| 5491 | { |
| 5492 | if (h->root.type == bfd_link_hash_indirect) |
| 5493 | return TRUE; |
| 5494 | |
| 5495 | if (h->root.type == bfd_link_hash_warning) |
| 5496 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5497 | |
| 5498 | if (readonly_dynrelocs (h)) |
| 5499 | { |
| 5500 | ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; |
| 5501 | |
| 5502 | /* Not an error, just cut short the traversal. */ |
| 5503 | return FALSE; |
| 5504 | } |
| 5505 | return TRUE; |
| 5506 | } |
| 5507 | |
| 5508 | /* Set the sizes of the dynamic sections. */ |
| 5509 | |
| 5510 | static bfd_boolean |
| 5511 | ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 5512 | struct bfd_link_info *info) |
| 5513 | { |
| 5514 | struct ppc_elf_link_hash_table *htab; |
| 5515 | asection *s; |
| 5516 | bfd_boolean relocs; |
| 5517 | bfd *ibfd; |
| 5518 | |
| 5519 | #ifdef DEBUG |
| 5520 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 5521 | #endif |
| 5522 | |
| 5523 | htab = ppc_elf_hash_table (info); |
| 5524 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 5525 | |
| 5526 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5527 | { |
| 5528 | /* Set the contents of the .interp section to the interpreter. */ |
| 5529 | if (info->executable) |
| 5530 | { |
| 5531 | s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); |
| 5532 | BFD_ASSERT (s != NULL); |
| 5533 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 5534 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 5535 | } |
| 5536 | } |
| 5537 | |
| 5538 | if (htab->plt_type == PLT_OLD) |
| 5539 | htab->got_header_size = 16; |
| 5540 | else if (htab->plt_type == PLT_NEW) |
| 5541 | htab->got_header_size = 12; |
| 5542 | |
| 5543 | /* Set up .got offsets for local syms, and space for local dynamic |
| 5544 | relocs. */ |
| 5545 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 5546 | { |
| 5547 | bfd_signed_vma *local_got; |
| 5548 | bfd_signed_vma *end_local_got; |
| 5549 | struct plt_entry **local_plt; |
| 5550 | struct plt_entry **end_local_plt; |
| 5551 | char *lgot_masks; |
| 5552 | bfd_size_type locsymcount; |
| 5553 | Elf_Internal_Shdr *symtab_hdr; |
| 5554 | |
| 5555 | if (!is_ppc_elf (ibfd)) |
| 5556 | continue; |
| 5557 | |
| 5558 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 5559 | { |
| 5560 | struct ppc_elf_dyn_relocs *p; |
| 5561 | |
| 5562 | for (p = ((struct ppc_elf_dyn_relocs *) |
| 5563 | elf_section_data (s)->local_dynrel); |
| 5564 | p != NULL; |
| 5565 | p = p->next) |
| 5566 | { |
| 5567 | if (!bfd_is_abs_section (p->sec) |
| 5568 | && bfd_is_abs_section (p->sec->output_section)) |
| 5569 | { |
| 5570 | /* Input section has been discarded, either because |
| 5571 | it is a copy of a linkonce section or due to |
| 5572 | linker script /DISCARD/, so we'll be discarding |
| 5573 | the relocs too. */ |
| 5574 | } |
| 5575 | else if (htab->is_vxworks |
| 5576 | && strcmp (p->sec->output_section->name, |
| 5577 | ".tls_vars") == 0) |
| 5578 | { |
| 5579 | /* Relocations in vxworks .tls_vars sections are |
| 5580 | handled specially by the loader. */ |
| 5581 | } |
| 5582 | else if (p->count != 0) |
| 5583 | { |
| 5584 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 5585 | if (!htab->elf.dynamic_sections_created) |
| 5586 | sreloc = htab->reliplt; |
| 5587 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 5588 | if ((p->sec->output_section->flags |
| 5589 | & (SEC_READONLY | SEC_ALLOC)) |
| 5590 | == (SEC_READONLY | SEC_ALLOC)) |
| 5591 | info->flags |= DF_TEXTREL; |
| 5592 | } |
| 5593 | } |
| 5594 | } |
| 5595 | |
| 5596 | local_got = elf_local_got_refcounts (ibfd); |
| 5597 | if (!local_got) |
| 5598 | continue; |
| 5599 | |
| 5600 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 5601 | locsymcount = symtab_hdr->sh_info; |
| 5602 | end_local_got = local_got + locsymcount; |
| 5603 | local_plt = (struct plt_entry **) end_local_got; |
| 5604 | end_local_plt = local_plt + locsymcount; |
| 5605 | lgot_masks = (char *) end_local_plt; |
| 5606 | |
| 5607 | for (; local_got < end_local_got; ++local_got, ++lgot_masks) |
| 5608 | if (*local_got > 0) |
| 5609 | { |
| 5610 | unsigned int need = 0; |
| 5611 | if ((*lgot_masks & TLS_TLS) != 0) |
| 5612 | { |
| 5613 | if ((*lgot_masks & TLS_GD) != 0) |
| 5614 | need += 8; |
| 5615 | if ((*lgot_masks & TLS_LD) != 0) |
| 5616 | htab->tlsld_got.refcount += 1; |
| 5617 | if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 5618 | need += 4; |
| 5619 | if ((*lgot_masks & TLS_DTPREL) != 0) |
| 5620 | need += 4; |
| 5621 | } |
| 5622 | else |
| 5623 | need += 4; |
| 5624 | if (need == 0) |
| 5625 | *local_got = (bfd_vma) -1; |
| 5626 | else |
| 5627 | { |
| 5628 | *local_got = allocate_got (htab, need); |
| 5629 | if (info->shared) |
| 5630 | htab->relgot->size += (need |
| 5631 | * (sizeof (Elf32_External_Rela) / 4)); |
| 5632 | } |
| 5633 | } |
| 5634 | else |
| 5635 | *local_got = (bfd_vma) -1; |
| 5636 | |
| 5637 | if (htab->is_vxworks) |
| 5638 | continue; |
| 5639 | |
| 5640 | /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ |
| 5641 | for (; local_plt < end_local_plt; ++local_plt) |
| 5642 | { |
| 5643 | struct plt_entry *ent; |
| 5644 | bfd_boolean doneone = FALSE; |
| 5645 | bfd_vma plt_offset = 0, glink_offset = 0; |
| 5646 | |
| 5647 | for (ent = *local_plt; ent != NULL; ent = ent->next) |
| 5648 | if (ent->plt.refcount > 0) |
| 5649 | { |
| 5650 | s = htab->iplt; |
| 5651 | |
| 5652 | if (!doneone) |
| 5653 | { |
| 5654 | plt_offset = s->size; |
| 5655 | s->size += 4; |
| 5656 | } |
| 5657 | ent->plt.offset = plt_offset; |
| 5658 | |
| 5659 | s = htab->glink; |
| 5660 | if (!doneone || info->shared) |
| 5661 | { |
| 5662 | glink_offset = s->size; |
| 5663 | s->size += GLINK_ENTRY_SIZE; |
| 5664 | } |
| 5665 | ent->glink_offset = glink_offset; |
| 5666 | |
| 5667 | if (!doneone) |
| 5668 | { |
| 5669 | htab->reliplt->size += sizeof (Elf32_External_Rela); |
| 5670 | doneone = TRUE; |
| 5671 | } |
| 5672 | } |
| 5673 | else |
| 5674 | ent->plt.offset = (bfd_vma) -1; |
| 5675 | } |
| 5676 | } |
| 5677 | |
| 5678 | /* Allocate space for global sym dynamic relocs. */ |
| 5679 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); |
| 5680 | |
| 5681 | if (htab->tlsld_got.refcount > 0) |
| 5682 | { |
| 5683 | htab->tlsld_got.offset = allocate_got (htab, 8); |
| 5684 | if (info->shared) |
| 5685 | htab->relgot->size += sizeof (Elf32_External_Rela); |
| 5686 | } |
| 5687 | else |
| 5688 | htab->tlsld_got.offset = (bfd_vma) -1; |
| 5689 | |
| 5690 | if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) |
| 5691 | { |
| 5692 | unsigned int g_o_t = 32768; |
| 5693 | |
| 5694 | /* If we haven't allocated the header, do so now. When we get here, |
| 5695 | for old plt/got the got size will be 0 to 32764 (not allocated), |
| 5696 | or 32780 to 65536 (header allocated). For new plt/got, the |
| 5697 | corresponding ranges are 0 to 32768 and 32780 to 65536. */ |
| 5698 | if (htab->got->size <= 32768) |
| 5699 | { |
| 5700 | g_o_t = htab->got->size; |
| 5701 | if (htab->plt_type == PLT_OLD) |
| 5702 | g_o_t += 4; |
| 5703 | htab->got->size += htab->got_header_size; |
| 5704 | } |
| 5705 | |
| 5706 | htab->elf.hgot->root.u.def.value = g_o_t; |
| 5707 | } |
| 5708 | if (info->shared) |
| 5709 | { |
| 5710 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 5711 | if (sda != NULL |
| 5712 | && !(sda->root.type == bfd_link_hash_defined |
| 5713 | || sda->root.type == bfd_link_hash_defweak)) |
| 5714 | { |
| 5715 | sda->root.type = bfd_link_hash_defined; |
| 5716 | sda->root.u.def.section = htab->elf.hgot->root.u.def.section; |
| 5717 | sda->root.u.def.value = htab->elf.hgot->root.u.def.value; |
| 5718 | } |
| 5719 | } |
| 5720 | |
| 5721 | if (htab->glink != NULL |
| 5722 | && htab->glink->size != 0 |
| 5723 | && htab->elf.dynamic_sections_created) |
| 5724 | { |
| 5725 | htab->glink_pltresolve = htab->glink->size; |
| 5726 | /* Space for the branch table. */ |
| 5727 | htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; |
| 5728 | /* Pad out to align the start of PLTresolve. */ |
| 5729 | htab->glink->size += -htab->glink->size & 15; |
| 5730 | htab->glink->size += GLINK_PLTRESOLVE; |
| 5731 | |
| 5732 | if (htab->emit_stub_syms) |
| 5733 | { |
| 5734 | struct elf_link_hash_entry *sh; |
| 5735 | sh = elf_link_hash_lookup (&htab->elf, "__glink", |
| 5736 | TRUE, FALSE, FALSE); |
| 5737 | if (sh == NULL) |
| 5738 | return FALSE; |
| 5739 | if (sh->root.type == bfd_link_hash_new) |
| 5740 | { |
| 5741 | sh->root.type = bfd_link_hash_defined; |
| 5742 | sh->root.u.def.section = htab->glink; |
| 5743 | sh->root.u.def.value = htab->glink_pltresolve; |
| 5744 | sh->ref_regular = 1; |
| 5745 | sh->def_regular = 1; |
| 5746 | sh->ref_regular_nonweak = 1; |
| 5747 | sh->forced_local = 1; |
| 5748 | sh->non_elf = 0; |
| 5749 | } |
| 5750 | sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", |
| 5751 | TRUE, FALSE, FALSE); |
| 5752 | if (sh == NULL) |
| 5753 | return FALSE; |
| 5754 | if (sh->root.type == bfd_link_hash_new) |
| 5755 | { |
| 5756 | sh->root.type = bfd_link_hash_defined; |
| 5757 | sh->root.u.def.section = htab->glink; |
| 5758 | sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; |
| 5759 | sh->ref_regular = 1; |
| 5760 | sh->def_regular = 1; |
| 5761 | sh->ref_regular_nonweak = 1; |
| 5762 | sh->forced_local = 1; |
| 5763 | sh->non_elf = 0; |
| 5764 | } |
| 5765 | } |
| 5766 | } |
| 5767 | |
| 5768 | /* We've now determined the sizes of the various dynamic sections. |
| 5769 | Allocate memory for them. */ |
| 5770 | relocs = FALSE; |
| 5771 | for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) |
| 5772 | { |
| 5773 | bfd_boolean strip_section = TRUE; |
| 5774 | |
| 5775 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 5776 | continue; |
| 5777 | |
| 5778 | if (s == htab->plt |
| 5779 | || s == htab->got) |
| 5780 | { |
| 5781 | /* We'd like to strip these sections if they aren't needed, but if |
| 5782 | we've exported dynamic symbols from them we must leave them. |
| 5783 | It's too late to tell BFD to get rid of the symbols. */ |
| 5784 | if (htab->elf.hplt != NULL) |
| 5785 | strip_section = FALSE; |
| 5786 | /* Strip this section if we don't need it; see the |
| 5787 | comment below. */ |
| 5788 | } |
| 5789 | else if (s == htab->iplt |
| 5790 | || s == htab->glink |
| 5791 | || s == htab->sgotplt |
| 5792 | || s == htab->sbss |
| 5793 | || s == htab->dynbss |
| 5794 | || s == htab->dynsbss |
| 5795 | || s == htab->sdata[0].section |
| 5796 | || s == htab->sdata[1].section) |
| 5797 | { |
| 5798 | /* Strip these too. */ |
| 5799 | } |
| 5800 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 5801 | { |
| 5802 | if (s->size != 0) |
| 5803 | { |
| 5804 | /* Remember whether there are any relocation sections. */ |
| 5805 | relocs = TRUE; |
| 5806 | |
| 5807 | /* We use the reloc_count field as a counter if we need |
| 5808 | to copy relocs into the output file. */ |
| 5809 | s->reloc_count = 0; |
| 5810 | } |
| 5811 | } |
| 5812 | else |
| 5813 | { |
| 5814 | /* It's not one of our sections, so don't allocate space. */ |
| 5815 | continue; |
| 5816 | } |
| 5817 | |
| 5818 | if (s->size == 0 && strip_section) |
| 5819 | { |
| 5820 | /* If we don't need this section, strip it from the |
| 5821 | output file. This is mostly to handle .rela.bss and |
| 5822 | .rela.plt. We must create both sections in |
| 5823 | create_dynamic_sections, because they must be created |
| 5824 | before the linker maps input sections to output |
| 5825 | sections. The linker does that before |
| 5826 | adjust_dynamic_symbol is called, and it is that |
| 5827 | function which decides whether anything needs to go |
| 5828 | into these sections. */ |
| 5829 | s->flags |= SEC_EXCLUDE; |
| 5830 | continue; |
| 5831 | } |
| 5832 | |
| 5833 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 5834 | continue; |
| 5835 | |
| 5836 | /* Allocate memory for the section contents. */ |
| 5837 | s->contents = bfd_zalloc (htab->elf.dynobj, s->size); |
| 5838 | if (s->contents == NULL) |
| 5839 | return FALSE; |
| 5840 | } |
| 5841 | |
| 5842 | if (htab->elf.dynamic_sections_created) |
| 5843 | { |
| 5844 | /* Add some entries to the .dynamic section. We fill in the |
| 5845 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 5846 | must add the entries now so that we get the correct size for |
| 5847 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 5848 | dynamic linker and used by the debugger. */ |
| 5849 | #define add_dynamic_entry(TAG, VAL) \ |
| 5850 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 5851 | |
| 5852 | if (info->executable) |
| 5853 | { |
| 5854 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 5855 | return FALSE; |
| 5856 | } |
| 5857 | |
| 5858 | if (htab->plt != NULL && htab->plt->size != 0) |
| 5859 | { |
| 5860 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 5861 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 5862 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 5863 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 5864 | return FALSE; |
| 5865 | } |
| 5866 | |
| 5867 | if (htab->glink != NULL && htab->glink->size != 0) |
| 5868 | { |
| 5869 | if (!add_dynamic_entry (DT_PPC_GOT, 0)) |
| 5870 | return FALSE; |
| 5871 | if (!htab->no_tls_get_addr_opt |
| 5872 | && htab->tls_get_addr != NULL |
| 5873 | && htab->tls_get_addr->plt.plist != NULL |
| 5874 | && !add_dynamic_entry (DT_PPC_TLSOPT, 0)) |
| 5875 | return FALSE; |
| 5876 | } |
| 5877 | |
| 5878 | if (relocs) |
| 5879 | { |
| 5880 | if (!add_dynamic_entry (DT_RELA, 0) |
| 5881 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 5882 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 5883 | return FALSE; |
| 5884 | } |
| 5885 | |
| 5886 | /* If any dynamic relocs apply to a read-only section, then we |
| 5887 | need a DT_TEXTREL entry. */ |
| 5888 | if ((info->flags & DF_TEXTREL) == 0) |
| 5889 | elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, |
| 5890 | info); |
| 5891 | |
| 5892 | if ((info->flags & DF_TEXTREL) != 0) |
| 5893 | { |
| 5894 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 5895 | return FALSE; |
| 5896 | } |
| 5897 | if (htab->is_vxworks |
| 5898 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
| 5899 | return FALSE; |
| 5900 | } |
| 5901 | #undef add_dynamic_entry |
| 5902 | |
| 5903 | return TRUE; |
| 5904 | } |
| 5905 | |
| 5906 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
| 5907 | |
| 5908 | static bfd_boolean |
| 5909 | ppc_elf_hash_symbol (struct elf_link_hash_entry *h) |
| 5910 | { |
| 5911 | if (h->plt.plist != NULL |
| 5912 | && !h->def_regular |
| 5913 | && (!h->pointer_equality_needed |
| 5914 | || !h->ref_regular_nonweak)) |
| 5915 | return FALSE; |
| 5916 | |
| 5917 | return _bfd_elf_hash_symbol (h); |
| 5918 | } |
| 5919 | \f |
| 5920 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
| 5921 | |
| 5922 | /* Relaxation trampolines. r12 is available for clobbering (r11, is |
| 5923 | used for some functions that are allowed to break the ABI). */ |
| 5924 | static const int shared_stub_entry[] = |
| 5925 | { |
| 5926 | 0x7c0802a6, /* mflr 0 */ |
| 5927 | 0x429f0005, /* bcl 20, 31, .Lxxx */ |
| 5928 | 0x7d8802a6, /* mflr 12 */ |
| 5929 | 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ |
| 5930 | 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */ |
| 5931 | 0x7c0803a6, /* mtlr 0 */ |
| 5932 | 0x7d8903a6, /* mtctr 12 */ |
| 5933 | 0x4e800420, /* bctr */ |
| 5934 | }; |
| 5935 | |
| 5936 | static const int stub_entry[] = |
| 5937 | { |
| 5938 | 0x3d800000, /* lis 12,xxx@ha */ |
| 5939 | 0x398c0000, /* addi 12,12,xxx@l */ |
| 5940 | 0x7d8903a6, /* mtctr 12 */ |
| 5941 | 0x4e800420, /* bctr */ |
| 5942 | }; |
| 5943 | |
| 5944 | static bfd_boolean |
| 5945 | ppc_elf_relax_section (bfd *abfd, |
| 5946 | asection *isec, |
| 5947 | struct bfd_link_info *link_info, |
| 5948 | bfd_boolean *again) |
| 5949 | { |
| 5950 | struct one_fixup |
| 5951 | { |
| 5952 | struct one_fixup *next; |
| 5953 | asection *tsec; |
| 5954 | /* Final link, can use the symbol offset. For a |
| 5955 | relocatable link we use the symbol's index. */ |
| 5956 | bfd_vma toff; |
| 5957 | bfd_vma trampoff; |
| 5958 | }; |
| 5959 | |
| 5960 | Elf_Internal_Shdr *symtab_hdr; |
| 5961 | bfd_byte *contents = NULL; |
| 5962 | Elf_Internal_Sym *isymbuf = NULL; |
| 5963 | Elf_Internal_Rela *internal_relocs = NULL; |
| 5964 | Elf_Internal_Rela *irel, *irelend; |
| 5965 | struct one_fixup *fixups = NULL; |
| 5966 | unsigned changes = 0; |
| 5967 | struct ppc_elf_link_hash_table *htab; |
| 5968 | bfd_size_type trampoff; |
| 5969 | asection *got2; |
| 5970 | bfd_boolean maybe_pasted; |
| 5971 | |
| 5972 | *again = FALSE; |
| 5973 | |
| 5974 | /* Nothing to do if there are no relocations, and no need to do |
| 5975 | anything with non-alloc or non-code sections. */ |
| 5976 | if ((isec->flags & SEC_ALLOC) == 0 |
| 5977 | || (isec->flags & SEC_CODE) == 0 |
| 5978 | || (isec->flags & SEC_RELOC) == 0 |
| 5979 | || isec->reloc_count == 0) |
| 5980 | return TRUE; |
| 5981 | |
| 5982 | /* We cannot represent the required PIC relocs in the output, so don't |
| 5983 | do anything. The linker doesn't support mixing -shared and -r |
| 5984 | anyway. */ |
| 5985 | if (link_info->relocatable && link_info->shared) |
| 5986 | return TRUE; |
| 5987 | |
| 5988 | trampoff = (isec->size + 3) & (bfd_vma) -4; |
| 5989 | maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 |
| 5990 | || strcmp (isec->output_section->name, ".fini") == 0); |
| 5991 | /* Space for a branch around any trampolines. */ |
| 5992 | if (maybe_pasted) |
| 5993 | trampoff += 4; |
| 5994 | |
| 5995 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 5996 | |
| 5997 | /* Get a copy of the native relocations. */ |
| 5998 | internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, |
| 5999 | link_info->keep_memory); |
| 6000 | if (internal_relocs == NULL) |
| 6001 | goto error_return; |
| 6002 | |
| 6003 | htab = ppc_elf_hash_table (link_info); |
| 6004 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 6005 | |
| 6006 | irelend = internal_relocs + isec->reloc_count; |
| 6007 | for (irel = internal_relocs; irel < irelend; irel++) |
| 6008 | { |
| 6009 | unsigned long r_type = ELF32_R_TYPE (irel->r_info); |
| 6010 | bfd_vma toff, roff; |
| 6011 | asection *tsec; |
| 6012 | struct one_fixup *f; |
| 6013 | size_t insn_offset = 0; |
| 6014 | bfd_vma max_branch_offset, val; |
| 6015 | bfd_byte *hit_addr; |
| 6016 | unsigned long t0; |
| 6017 | struct elf_link_hash_entry *h; |
| 6018 | struct plt_entry **plist; |
| 6019 | unsigned char sym_type; |
| 6020 | |
| 6021 | switch (r_type) |
| 6022 | { |
| 6023 | case R_PPC_REL24: |
| 6024 | case R_PPC_LOCAL24PC: |
| 6025 | case R_PPC_PLTREL24: |
| 6026 | max_branch_offset = 1 << 25; |
| 6027 | break; |
| 6028 | |
| 6029 | case R_PPC_REL14: |
| 6030 | case R_PPC_REL14_BRTAKEN: |
| 6031 | case R_PPC_REL14_BRNTAKEN: |
| 6032 | max_branch_offset = 1 << 15; |
| 6033 | break; |
| 6034 | |
| 6035 | default: |
| 6036 | continue; |
| 6037 | } |
| 6038 | |
| 6039 | /* Get the value of the symbol referred to by the reloc. */ |
| 6040 | h = NULL; |
| 6041 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 6042 | { |
| 6043 | /* A local symbol. */ |
| 6044 | Elf_Internal_Sym *isym; |
| 6045 | |
| 6046 | /* Read this BFD's local symbols. */ |
| 6047 | if (isymbuf == NULL) |
| 6048 | { |
| 6049 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 6050 | if (isymbuf == NULL) |
| 6051 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 6052 | symtab_hdr->sh_info, 0, |
| 6053 | NULL, NULL, NULL); |
| 6054 | if (isymbuf == 0) |
| 6055 | goto error_return; |
| 6056 | } |
| 6057 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 6058 | if (isym->st_shndx == SHN_UNDEF) |
| 6059 | tsec = bfd_und_section_ptr; |
| 6060 | else if (isym->st_shndx == SHN_ABS) |
| 6061 | tsec = bfd_abs_section_ptr; |
| 6062 | else if (isym->st_shndx == SHN_COMMON) |
| 6063 | tsec = bfd_com_section_ptr; |
| 6064 | else |
| 6065 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 6066 | |
| 6067 | toff = isym->st_value; |
| 6068 | sym_type = ELF_ST_TYPE (isym->st_info); |
| 6069 | } |
| 6070 | else |
| 6071 | { |
| 6072 | /* Global symbol handling. */ |
| 6073 | unsigned long indx; |
| 6074 | |
| 6075 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 6076 | h = elf_sym_hashes (abfd)[indx]; |
| 6077 | |
| 6078 | while (h->root.type == bfd_link_hash_indirect |
| 6079 | || h->root.type == bfd_link_hash_warning) |
| 6080 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6081 | |
| 6082 | if (h->root.type == bfd_link_hash_defined |
| 6083 | || h->root.type == bfd_link_hash_defweak) |
| 6084 | { |
| 6085 | tsec = h->root.u.def.section; |
| 6086 | toff = h->root.u.def.value; |
| 6087 | } |
| 6088 | else if (h->root.type == bfd_link_hash_undefined |
| 6089 | || h->root.type == bfd_link_hash_undefweak) |
| 6090 | { |
| 6091 | tsec = bfd_und_section_ptr; |
| 6092 | toff = link_info->relocatable ? indx : 0; |
| 6093 | } |
| 6094 | else |
| 6095 | continue; |
| 6096 | |
| 6097 | sym_type = h->type; |
| 6098 | } |
| 6099 | |
| 6100 | /* The condition here under which we call find_plt_ent must |
| 6101 | match that in relocate_section. If we call find_plt_ent here |
| 6102 | but not in relocate_section, or vice versa, then the branch |
| 6103 | destination used here may be incorrect. */ |
| 6104 | plist = NULL; |
| 6105 | if (h != NULL) |
| 6106 | { |
| 6107 | /* We know is_branch_reloc (r_type) is true. */ |
| 6108 | if (h->type == STT_GNU_IFUNC |
| 6109 | || r_type == R_PPC_PLTREL24) |
| 6110 | plist = &h->plt.plist; |
| 6111 | } |
| 6112 | else if (sym_type == STT_GNU_IFUNC |
| 6113 | && elf_local_got_offsets (abfd) != NULL) |
| 6114 | { |
| 6115 | bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); |
| 6116 | struct plt_entry **local_plt = (struct plt_entry **) |
| 6117 | (local_got_offsets + symtab_hdr->sh_info); |
| 6118 | plist = local_plt + ELF32_R_SYM (irel->r_info); |
| 6119 | } |
| 6120 | if (plist != NULL) |
| 6121 | { |
| 6122 | bfd_vma addend = 0; |
| 6123 | struct plt_entry *ent; |
| 6124 | |
| 6125 | if (r_type == R_PPC_PLTREL24 && link_info->shared) |
| 6126 | addend = irel->r_addend; |
| 6127 | ent = find_plt_ent (plist, got2, addend); |
| 6128 | if (ent != NULL) |
| 6129 | { |
| 6130 | if (htab->plt_type == PLT_NEW |
| 6131 | || h == NULL |
| 6132 | || !htab->elf.dynamic_sections_created |
| 6133 | || h->dynindx == -1) |
| 6134 | { |
| 6135 | tsec = htab->glink; |
| 6136 | toff = ent->glink_offset; |
| 6137 | } |
| 6138 | else |
| 6139 | { |
| 6140 | tsec = htab->plt; |
| 6141 | toff = ent->plt.offset; |
| 6142 | } |
| 6143 | } |
| 6144 | } |
| 6145 | |
| 6146 | /* If the branch and target are in the same section, you have |
| 6147 | no hope of adding stubs. We'll error out later should the |
| 6148 | branch overflow. */ |
| 6149 | if (tsec == isec) |
| 6150 | continue; |
| 6151 | |
| 6152 | /* There probably isn't any reason to handle symbols in |
| 6153 | SEC_MERGE sections; SEC_MERGE doesn't seem a likely |
| 6154 | attribute for a code section, and we are only looking at |
| 6155 | branches. However, implement it correctly here as a |
| 6156 | reference for other target relax_section functions. */ |
| 6157 | if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE) |
| 6158 | { |
| 6159 | /* At this stage in linking, no SEC_MERGE symbol has been |
| 6160 | adjusted, so all references to such symbols need to be |
| 6161 | passed through _bfd_merged_section_offset. (Later, in |
| 6162 | relocate_section, all SEC_MERGE symbols *except* for |
| 6163 | section symbols have been adjusted.) |
| 6164 | |
| 6165 | gas may reduce relocations against symbols in SEC_MERGE |
| 6166 | sections to a relocation against the section symbol when |
| 6167 | the original addend was zero. When the reloc is against |
| 6168 | a section symbol we should include the addend in the |
| 6169 | offset passed to _bfd_merged_section_offset, since the |
| 6170 | location of interest is the original symbol. On the |
| 6171 | other hand, an access to "sym+addend" where "sym" is not |
| 6172 | a section symbol should not include the addend; Such an |
| 6173 | access is presumed to be an offset from "sym"; The |
| 6174 | location of interest is just "sym". */ |
| 6175 | if (sym_type == STT_SECTION) |
| 6176 | toff += irel->r_addend; |
| 6177 | |
| 6178 | toff = _bfd_merged_section_offset (abfd, &tsec, |
| 6179 | elf_section_data (tsec)->sec_info, |
| 6180 | toff); |
| 6181 | |
| 6182 | if (sym_type != STT_SECTION) |
| 6183 | toff += irel->r_addend; |
| 6184 | } |
| 6185 | /* PLTREL24 addends are special. */ |
| 6186 | else if (r_type != R_PPC_PLTREL24) |
| 6187 | toff += irel->r_addend; |
| 6188 | |
| 6189 | /* Attempted -shared link of non-pic code loses. */ |
| 6190 | if (tsec->output_section == NULL) |
| 6191 | continue; |
| 6192 | |
| 6193 | roff = irel->r_offset; |
| 6194 | |
| 6195 | /* If the branch is in range, no need to do anything. */ |
| 6196 | if (tsec != bfd_und_section_ptr |
| 6197 | && (!link_info->relocatable |
| 6198 | /* A relocatable link may have sections moved during |
| 6199 | final link, so do not presume they remain in range. */ |
| 6200 | || tsec->output_section == isec->output_section)) |
| 6201 | { |
| 6202 | bfd_vma symaddr, reladdr; |
| 6203 | |
| 6204 | symaddr = tsec->output_section->vma + tsec->output_offset + toff; |
| 6205 | reladdr = isec->output_section->vma + isec->output_offset + roff; |
| 6206 | if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) |
| 6207 | continue; |
| 6208 | } |
| 6209 | |
| 6210 | /* Look for an existing fixup to this address. */ |
| 6211 | for (f = fixups; f ; f = f->next) |
| 6212 | if (f->tsec == tsec && f->toff == toff) |
| 6213 | break; |
| 6214 | |
| 6215 | if (f == NULL) |
| 6216 | { |
| 6217 | size_t size; |
| 6218 | unsigned long stub_rtype; |
| 6219 | |
| 6220 | val = trampoff - roff; |
| 6221 | if (val >= max_branch_offset) |
| 6222 | /* Oh dear, we can't reach a trampoline. Don't try to add |
| 6223 | one. We'll report an error later. */ |
| 6224 | continue; |
| 6225 | |
| 6226 | if (link_info->shared) |
| 6227 | { |
| 6228 | size = 4 * ARRAY_SIZE (shared_stub_entry); |
| 6229 | insn_offset = 12; |
| 6230 | } |
| 6231 | else |
| 6232 | { |
| 6233 | size = 4 * ARRAY_SIZE (stub_entry); |
| 6234 | insn_offset = 0; |
| 6235 | } |
| 6236 | stub_rtype = R_PPC_RELAX; |
| 6237 | if (tsec == htab->plt |
| 6238 | || tsec == htab->glink) |
| 6239 | { |
| 6240 | stub_rtype = R_PPC_RELAX_PLT; |
| 6241 | if (r_type == R_PPC_PLTREL24) |
| 6242 | stub_rtype = R_PPC_RELAX_PLTREL24; |
| 6243 | } |
| 6244 | |
| 6245 | /* Hijack the old relocation. Since we need two |
| 6246 | relocations for this use a "composite" reloc. */ |
| 6247 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 6248 | stub_rtype); |
| 6249 | irel->r_offset = trampoff + insn_offset; |
| 6250 | if (r_type == R_PPC_PLTREL24 |
| 6251 | && stub_rtype != R_PPC_RELAX_PLTREL24) |
| 6252 | irel->r_addend = 0; |
| 6253 | |
| 6254 | /* Record the fixup so we don't do it again this section. */ |
| 6255 | f = bfd_malloc (sizeof (*f)); |
| 6256 | f->next = fixups; |
| 6257 | f->tsec = tsec; |
| 6258 | f->toff = toff; |
| 6259 | f->trampoff = trampoff; |
| 6260 | fixups = f; |
| 6261 | |
| 6262 | trampoff += size; |
| 6263 | changes++; |
| 6264 | } |
| 6265 | else |
| 6266 | { |
| 6267 | val = f->trampoff - roff; |
| 6268 | if (val >= max_branch_offset) |
| 6269 | continue; |
| 6270 | |
| 6271 | /* Nop out the reloc, since we're finalizing things here. */ |
| 6272 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 6273 | } |
| 6274 | |
| 6275 | /* Get the section contents. */ |
| 6276 | if (contents == NULL) |
| 6277 | { |
| 6278 | /* Get cached copy if it exists. */ |
| 6279 | if (elf_section_data (isec)->this_hdr.contents != NULL) |
| 6280 | contents = elf_section_data (isec)->this_hdr.contents; |
| 6281 | else |
| 6282 | { |
| 6283 | /* Go get them off disk. */ |
| 6284 | if (!bfd_malloc_and_get_section (abfd, isec, &contents)) |
| 6285 | goto error_return; |
| 6286 | } |
| 6287 | } |
| 6288 | |
| 6289 | /* Fix up the existing branch to hit the trampoline. */ |
| 6290 | hit_addr = contents + roff; |
| 6291 | switch (r_type) |
| 6292 | { |
| 6293 | case R_PPC_REL24: |
| 6294 | case R_PPC_LOCAL24PC: |
| 6295 | case R_PPC_PLTREL24: |
| 6296 | t0 = bfd_get_32 (abfd, hit_addr); |
| 6297 | t0 &= ~0x3fffffc; |
| 6298 | t0 |= val & 0x3fffffc; |
| 6299 | bfd_put_32 (abfd, t0, hit_addr); |
| 6300 | break; |
| 6301 | |
| 6302 | case R_PPC_REL14: |
| 6303 | case R_PPC_REL14_BRTAKEN: |
| 6304 | case R_PPC_REL14_BRNTAKEN: |
| 6305 | t0 = bfd_get_32 (abfd, hit_addr); |
| 6306 | t0 &= ~0xfffc; |
| 6307 | t0 |= val & 0xfffc; |
| 6308 | bfd_put_32 (abfd, t0, hit_addr); |
| 6309 | break; |
| 6310 | } |
| 6311 | } |
| 6312 | |
| 6313 | /* Write out the trampolines. */ |
| 6314 | if (fixups != NULL) |
| 6315 | { |
| 6316 | const int *stub; |
| 6317 | bfd_byte *dest; |
| 6318 | int i, size; |
| 6319 | |
| 6320 | do |
| 6321 | { |
| 6322 | struct one_fixup *f = fixups; |
| 6323 | fixups = fixups->next; |
| 6324 | free (f); |
| 6325 | } |
| 6326 | while (fixups); |
| 6327 | |
| 6328 | contents = bfd_realloc_or_free (contents, trampoff); |
| 6329 | if (contents == NULL) |
| 6330 | goto error_return; |
| 6331 | |
| 6332 | isec->size = (isec->size + 3) & (bfd_vma) -4; |
| 6333 | dest = contents + isec->size; |
| 6334 | /* Branch around the trampolines. */ |
| 6335 | if (maybe_pasted) |
| 6336 | { |
| 6337 | bfd_vma val = B + trampoff - isec->size; |
| 6338 | bfd_put_32 (abfd, val, dest); |
| 6339 | dest += 4; |
| 6340 | } |
| 6341 | isec->size = trampoff; |
| 6342 | |
| 6343 | if (link_info->shared) |
| 6344 | { |
| 6345 | stub = shared_stub_entry; |
| 6346 | size = ARRAY_SIZE (shared_stub_entry); |
| 6347 | } |
| 6348 | else |
| 6349 | { |
| 6350 | stub = stub_entry; |
| 6351 | size = ARRAY_SIZE (stub_entry); |
| 6352 | } |
| 6353 | |
| 6354 | i = 0; |
| 6355 | while (dest < contents + trampoff) |
| 6356 | { |
| 6357 | bfd_put_32 (abfd, stub[i], dest); |
| 6358 | i++; |
| 6359 | if (i == size) |
| 6360 | i = 0; |
| 6361 | dest += 4; |
| 6362 | } |
| 6363 | BFD_ASSERT (i == 0); |
| 6364 | } |
| 6365 | |
| 6366 | if (isymbuf != NULL |
| 6367 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 6368 | { |
| 6369 | if (! link_info->keep_memory) |
| 6370 | free (isymbuf); |
| 6371 | else |
| 6372 | { |
| 6373 | /* Cache the symbols for elf_link_input_bfd. */ |
| 6374 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 6375 | } |
| 6376 | } |
| 6377 | |
| 6378 | if (contents != NULL |
| 6379 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 6380 | { |
| 6381 | if (!changes && !link_info->keep_memory) |
| 6382 | free (contents); |
| 6383 | else |
| 6384 | { |
| 6385 | /* Cache the section contents for elf_link_input_bfd. */ |
| 6386 | elf_section_data (isec)->this_hdr.contents = contents; |
| 6387 | } |
| 6388 | } |
| 6389 | |
| 6390 | if (changes != 0) |
| 6391 | { |
| 6392 | /* Append sufficient NOP relocs so we can write out relocation |
| 6393 | information for the trampolines. */ |
| 6394 | Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) |
| 6395 | * sizeof (*new_relocs)); |
| 6396 | unsigned ix; |
| 6397 | |
| 6398 | if (!new_relocs) |
| 6399 | goto error_return; |
| 6400 | memcpy (new_relocs, internal_relocs, |
| 6401 | isec->reloc_count * sizeof (*new_relocs)); |
| 6402 | for (ix = changes; ix--;) |
| 6403 | { |
| 6404 | irel = new_relocs + ix + isec->reloc_count; |
| 6405 | |
| 6406 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 6407 | } |
| 6408 | if (internal_relocs != elf_section_data (isec)->relocs) |
| 6409 | free (internal_relocs); |
| 6410 | elf_section_data (isec)->relocs = new_relocs; |
| 6411 | isec->reloc_count += changes; |
| 6412 | elf_section_data (isec)->rel_hdr.sh_size |
| 6413 | += changes * elf_section_data (isec)->rel_hdr.sh_entsize; |
| 6414 | } |
| 6415 | else if (elf_section_data (isec)->relocs != internal_relocs) |
| 6416 | free (internal_relocs); |
| 6417 | |
| 6418 | *again = changes != 0; |
| 6419 | if (!*again && link_info->relocatable) |
| 6420 | { |
| 6421 | /* Convert the internal relax relocs to external form. */ |
| 6422 | for (irel = internal_relocs; irel < irelend; irel++) |
| 6423 | if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX) |
| 6424 | { |
| 6425 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); |
| 6426 | |
| 6427 | /* Rewrite the reloc and convert one of the trailing nop |
| 6428 | relocs to describe this relocation. */ |
| 6429 | BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE); |
| 6430 | /* The relocs are at the bottom 2 bytes */ |
| 6431 | irel[0].r_offset += 2; |
| 6432 | memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel)); |
| 6433 | irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); |
| 6434 | irel[1].r_offset += 4; |
| 6435 | irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); |
| 6436 | irel++; |
| 6437 | } |
| 6438 | } |
| 6439 | |
| 6440 | return TRUE; |
| 6441 | |
| 6442 | error_return: |
| 6443 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
| 6444 | free (isymbuf); |
| 6445 | if (contents != NULL |
| 6446 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 6447 | free (contents); |
| 6448 | if (internal_relocs != NULL |
| 6449 | && elf_section_data (isec)->relocs != internal_relocs) |
| 6450 | free (internal_relocs); |
| 6451 | return FALSE; |
| 6452 | } |
| 6453 | \f |
| 6454 | /* What to do when ld finds relocations against symbols defined in |
| 6455 | discarded sections. */ |
| 6456 | |
| 6457 | static unsigned int |
| 6458 | ppc_elf_action_discarded (asection *sec) |
| 6459 | { |
| 6460 | if (strcmp (".fixup", sec->name) == 0) |
| 6461 | return 0; |
| 6462 | |
| 6463 | if (strcmp (".got2", sec->name) == 0) |
| 6464 | return 0; |
| 6465 | |
| 6466 | return _bfd_elf_default_action_discarded (sec); |
| 6467 | } |
| 6468 | \f |
| 6469 | /* Fill in the address for a pointer generated in a linker section. */ |
| 6470 | |
| 6471 | static bfd_vma |
| 6472 | elf_finish_pointer_linker_section (bfd *input_bfd, |
| 6473 | elf_linker_section_t *lsect, |
| 6474 | struct elf_link_hash_entry *h, |
| 6475 | bfd_vma relocation, |
| 6476 | const Elf_Internal_Rela *rel) |
| 6477 | { |
| 6478 | elf_linker_section_pointers_t *linker_section_ptr; |
| 6479 | |
| 6480 | BFD_ASSERT (lsect != NULL); |
| 6481 | |
| 6482 | if (h != NULL) |
| 6483 | { |
| 6484 | /* Handle global symbol. */ |
| 6485 | struct ppc_elf_link_hash_entry *eh; |
| 6486 | |
| 6487 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 6488 | BFD_ASSERT (eh->elf.def_regular); |
| 6489 | linker_section_ptr = eh->linker_section_pointer; |
| 6490 | } |
| 6491 | else |
| 6492 | { |
| 6493 | /* Handle local symbol. */ |
| 6494 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 6495 | |
| 6496 | BFD_ASSERT (is_ppc_elf (input_bfd)); |
| 6497 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); |
| 6498 | linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; |
| 6499 | } |
| 6500 | |
| 6501 | linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, |
| 6502 | rel->r_addend, |
| 6503 | lsect); |
| 6504 | BFD_ASSERT (linker_section_ptr != NULL); |
| 6505 | |
| 6506 | /* Offset will always be a multiple of four, so use the bottom bit |
| 6507 | as a "written" flag. */ |
| 6508 | if ((linker_section_ptr->offset & 1) == 0) |
| 6509 | { |
| 6510 | bfd_put_32 (lsect->section->owner, |
| 6511 | relocation + linker_section_ptr->addend, |
| 6512 | lsect->section->contents + linker_section_ptr->offset); |
| 6513 | linker_section_ptr->offset += 1; |
| 6514 | } |
| 6515 | |
| 6516 | relocation = (lsect->section->output_section->vma |
| 6517 | + lsect->section->output_offset |
| 6518 | + linker_section_ptr->offset - 1 |
| 6519 | - SYM_VAL (lsect->sym)); |
| 6520 | |
| 6521 | #ifdef DEBUG |
| 6522 | fprintf (stderr, |
| 6523 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", |
| 6524 | lsect->name, (long) relocation, (long) relocation); |
| 6525 | #endif |
| 6526 | |
| 6527 | return relocation; |
| 6528 | } |
| 6529 | |
| 6530 | #define PPC_LO(v) ((v) & 0xffff) |
| 6531 | #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| 6532 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| 6533 | |
| 6534 | static void |
| 6535 | write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, |
| 6536 | struct bfd_link_info *info) |
| 6537 | { |
| 6538 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 6539 | bfd *output_bfd = info->output_bfd; |
| 6540 | bfd_vma plt; |
| 6541 | |
| 6542 | plt = ((ent->plt.offset & ~1) |
| 6543 | + plt_sec->output_section->vma |
| 6544 | + plt_sec->output_offset); |
| 6545 | |
| 6546 | if (info->shared) |
| 6547 | { |
| 6548 | bfd_vma got = 0; |
| 6549 | |
| 6550 | if (ent->addend >= 32768) |
| 6551 | got = (ent->addend |
| 6552 | + ent->sec->output_section->vma |
| 6553 | + ent->sec->output_offset); |
| 6554 | else if (htab->elf.hgot != NULL) |
| 6555 | got = SYM_VAL (htab->elf.hgot); |
| 6556 | |
| 6557 | plt -= got; |
| 6558 | |
| 6559 | if (plt + 0x8000 < 0x10000) |
| 6560 | { |
| 6561 | bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); |
| 6562 | p += 4; |
| 6563 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 6564 | p += 4; |
| 6565 | bfd_put_32 (output_bfd, BCTR, p); |
| 6566 | p += 4; |
| 6567 | bfd_put_32 (output_bfd, NOP, p); |
| 6568 | p += 4; |
| 6569 | } |
| 6570 | else |
| 6571 | { |
| 6572 | bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); |
| 6573 | p += 4; |
| 6574 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); |
| 6575 | p += 4; |
| 6576 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 6577 | p += 4; |
| 6578 | bfd_put_32 (output_bfd, BCTR, p); |
| 6579 | p += 4; |
| 6580 | } |
| 6581 | } |
| 6582 | else |
| 6583 | { |
| 6584 | bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); |
| 6585 | p += 4; |
| 6586 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); |
| 6587 | p += 4; |
| 6588 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 6589 | p += 4; |
| 6590 | bfd_put_32 (output_bfd, BCTR, p); |
| 6591 | p += 4; |
| 6592 | } |
| 6593 | } |
| 6594 | |
| 6595 | /* Return true if symbol is defined statically. */ |
| 6596 | |
| 6597 | static bfd_boolean |
| 6598 | is_static_defined (struct elf_link_hash_entry *h) |
| 6599 | { |
| 6600 | return ((h->root.type == bfd_link_hash_defined |
| 6601 | || h->root.type == bfd_link_hash_defweak) |
| 6602 | && h->root.u.def.section != NULL |
| 6603 | && h->root.u.def.section->output_section != NULL); |
| 6604 | } |
| 6605 | |
| 6606 | /* If INSN is an opcode that may be used with an @tls operand, return |
| 6607 | the transformed insn for TLS optimisation, otherwise return 0. If |
| 6608 | REG is non-zero only match an insn with RB or RA equal to REG. */ |
| 6609 | |
| 6610 | unsigned int |
| 6611 | _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) |
| 6612 | { |
| 6613 | unsigned int rtra; |
| 6614 | |
| 6615 | if ((insn & (0x3f << 26)) != 31 << 26) |
| 6616 | return 0; |
| 6617 | |
| 6618 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) |
| 6619 | rtra = insn & ((1 << 26) - (1 << 16)); |
| 6620 | else if (((insn >> 16) & 0x1f) == reg) |
| 6621 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); |
| 6622 | else |
| 6623 | return 0; |
| 6624 | |
| 6625 | if ((insn & (0x3ff << 1)) == 266 << 1) |
| 6626 | /* add -> addi. */ |
| 6627 | insn = 14 << 26; |
| 6628 | else if ((insn & (0x1f << 1)) == 23 << 1 |
| 6629 | && ((insn & (0x1f << 6)) < 14 << 6 |
| 6630 | || ((insn & (0x1f << 6)) >= 16 << 6 |
| 6631 | && (insn & (0x1f << 6)) < 24 << 6))) |
| 6632 | /* load and store indexed -> dform. */ |
| 6633 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; |
| 6634 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) |
| 6635 | /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| 6636 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); |
| 6637 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) |
| 6638 | /* lwax -> lwa. */ |
| 6639 | insn = (58 << 26) | 2; |
| 6640 | else |
| 6641 | return 0; |
| 6642 | insn |= rtra; |
| 6643 | return insn; |
| 6644 | } |
| 6645 | |
| 6646 | /* If INSN is an opcode that may be used with an @tprel operand, return |
| 6647 | the transformed insn for an undefined weak symbol, ie. with the |
| 6648 | thread pointer REG operand removed. Otherwise return 0. */ |
| 6649 | |
| 6650 | unsigned int |
| 6651 | _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) |
| 6652 | { |
| 6653 | if ((insn & (0x1f << 16)) == reg << 16 |
| 6654 | && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ |
| 6655 | || (insn & (0x3f << 26)) == 15u << 26 /* addis */ |
| 6656 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ |
| 6657 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ |
| 6658 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ |
| 6659 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ |
| 6660 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ |
| 6661 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ |
| 6662 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ |
| 6663 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ |
| 6664 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ |
| 6665 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ |
| 6666 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ |
| 6667 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ |
| 6668 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ |
| 6669 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ |
| 6670 | && (insn & 3) != 1) |
| 6671 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ |
| 6672 | && ((insn & 3) == 0 || (insn & 3) == 3)))) |
| 6673 | { |
| 6674 | insn &= ~(0x1f << 16); |
| 6675 | } |
| 6676 | else if ((insn & (0x1f << 21)) == reg << 21 |
| 6677 | && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ |
| 6678 | || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ |
| 6679 | || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) |
| 6680 | { |
| 6681 | insn &= ~(0x1f << 21); |
| 6682 | insn |= (insn & (0x1f << 16)) << 5; |
| 6683 | if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) |
| 6684 | insn -= 2 >> 26; /* convert to ori,oris */ |
| 6685 | } |
| 6686 | else |
| 6687 | insn = 0; |
| 6688 | return insn; |
| 6689 | } |
| 6690 | |
| 6691 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 6692 | to handle the relocations for a section. |
| 6693 | |
| 6694 | The relocs are always passed as Rela structures; if the section |
| 6695 | actually uses Rel structures, the r_addend field will always be |
| 6696 | zero. |
| 6697 | |
| 6698 | This function is responsible for adjust the section contents as |
| 6699 | necessary, and (if using Rela relocs and generating a |
| 6700 | relocatable output file) adjusting the reloc addend as |
| 6701 | necessary. |
| 6702 | |
| 6703 | This function does not have to worry about setting the reloc |
| 6704 | address or the reloc symbol index. |
| 6705 | |
| 6706 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 6707 | |
| 6708 | LOCAL_SECTIONS is an array giving the section in the input file |
| 6709 | corresponding to the st_shndx field of each local symbol. |
| 6710 | |
| 6711 | The global hash table entry for the global symbols can be found |
| 6712 | via elf_sym_hashes (input_bfd). |
| 6713 | |
| 6714 | When generating relocatable output, this function must handle |
| 6715 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 6716 | going to be the section symbol corresponding to the output |
| 6717 | section, which means that the addend must be adjusted |
| 6718 | accordingly. */ |
| 6719 | |
| 6720 | static bfd_boolean |
| 6721 | ppc_elf_relocate_section (bfd *output_bfd, |
| 6722 | struct bfd_link_info *info, |
| 6723 | bfd *input_bfd, |
| 6724 | asection *input_section, |
| 6725 | bfd_byte *contents, |
| 6726 | Elf_Internal_Rela *relocs, |
| 6727 | Elf_Internal_Sym *local_syms, |
| 6728 | asection **local_sections) |
| 6729 | { |
| 6730 | Elf_Internal_Shdr *symtab_hdr; |
| 6731 | struct elf_link_hash_entry **sym_hashes; |
| 6732 | struct ppc_elf_link_hash_table *htab; |
| 6733 | Elf_Internal_Rela *rel; |
| 6734 | Elf_Internal_Rela *relend; |
| 6735 | Elf_Internal_Rela outrel; |
| 6736 | asection *got2, *sreloc = NULL; |
| 6737 | bfd_vma *local_got_offsets; |
| 6738 | bfd_boolean ret = TRUE; |
| 6739 | bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); |
| 6740 | bfd_boolean is_vxworks_tls; |
| 6741 | |
| 6742 | #ifdef DEBUG |
| 6743 | _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " |
| 6744 | "%ld relocations%s", |
| 6745 | input_bfd, input_section, |
| 6746 | (long) input_section->reloc_count, |
| 6747 | (info->relocatable) ? " (relocatable)" : ""); |
| 6748 | #endif |
| 6749 | |
| 6750 | got2 = bfd_get_section_by_name (input_bfd, ".got2"); |
| 6751 | |
| 6752 | /* Initialize howto table if not already done. */ |
| 6753 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 6754 | ppc_elf_howto_init (); |
| 6755 | |
| 6756 | htab = ppc_elf_hash_table (info); |
| 6757 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 6758 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 6759 | sym_hashes = elf_sym_hashes (input_bfd); |
| 6760 | /* We have to handle relocations in vxworks .tls_vars sections |
| 6761 | specially, because the dynamic loader is 'weird'. */ |
| 6762 | is_vxworks_tls = (htab->is_vxworks && info->shared |
| 6763 | && !strcmp (input_section->output_section->name, |
| 6764 | ".tls_vars")); |
| 6765 | rel = relocs; |
| 6766 | relend = relocs + input_section->reloc_count; |
| 6767 | for (; rel < relend; rel++) |
| 6768 | { |
| 6769 | enum elf_ppc_reloc_type r_type; |
| 6770 | bfd_vma addend; |
| 6771 | bfd_reloc_status_type r; |
| 6772 | Elf_Internal_Sym *sym; |
| 6773 | asection *sec; |
| 6774 | struct elf_link_hash_entry *h; |
| 6775 | const char *sym_name; |
| 6776 | reloc_howto_type *howto; |
| 6777 | unsigned long r_symndx; |
| 6778 | bfd_vma relocation; |
| 6779 | bfd_vma branch_bit, from; |
| 6780 | bfd_boolean unresolved_reloc; |
| 6781 | bfd_boolean warned; |
| 6782 | unsigned int tls_type, tls_mask, tls_gd; |
| 6783 | struct plt_entry **ifunc; |
| 6784 | |
| 6785 | r_type = ELF32_R_TYPE (rel->r_info); |
| 6786 | sym = NULL; |
| 6787 | sec = NULL; |
| 6788 | h = NULL; |
| 6789 | unresolved_reloc = FALSE; |
| 6790 | warned = FALSE; |
| 6791 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 6792 | |
| 6793 | if (r_symndx < symtab_hdr->sh_info) |
| 6794 | { |
| 6795 | sym = local_syms + r_symndx; |
| 6796 | sec = local_sections[r_symndx]; |
| 6797 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 6798 | |
| 6799 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 6800 | } |
| 6801 | else |
| 6802 | { |
| 6803 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 6804 | r_symndx, symtab_hdr, sym_hashes, |
| 6805 | h, sec, relocation, |
| 6806 | unresolved_reloc, warned); |
| 6807 | |
| 6808 | sym_name = h->root.root.string; |
| 6809 | } |
| 6810 | |
| 6811 | if (sec != NULL && elf_discarded_section (sec)) |
| 6812 | { |
| 6813 | /* For relocs against symbols from removed linkonce sections, |
| 6814 | or sections discarded by a linker script, we just want the |
| 6815 | section contents zeroed. Avoid any special processing. */ |
| 6816 | howto = NULL; |
| 6817 | if (r_type < R_PPC_max) |
| 6818 | howto = ppc_elf_howto_table[r_type]; |
| 6819 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 6820 | rel->r_info = 0; |
| 6821 | rel->r_addend = 0; |
| 6822 | continue; |
| 6823 | } |
| 6824 | |
| 6825 | if (info->relocatable) |
| 6826 | { |
| 6827 | if (got2 != NULL |
| 6828 | && r_type == R_PPC_PLTREL24 |
| 6829 | && rel->r_addend >= 32768) |
| 6830 | { |
| 6831 | /* R_PPC_PLTREL24 is rather special. If non-zero, the |
| 6832 | addend specifies the GOT pointer offset within .got2. */ |
| 6833 | rel->r_addend += got2->output_offset; |
| 6834 | } |
| 6835 | continue; |
| 6836 | } |
| 6837 | |
| 6838 | /* TLS optimizations. Replace instruction sequences and relocs |
| 6839 | based on information we collected in tls_optimize. We edit |
| 6840 | RELOCS so that --emit-relocs will output something sensible |
| 6841 | for the final instruction stream. */ |
| 6842 | tls_mask = 0; |
| 6843 | tls_gd = 0; |
| 6844 | if (h != NULL) |
| 6845 | tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; |
| 6846 | else if (local_got_offsets != NULL) |
| 6847 | { |
| 6848 | struct plt_entry **local_plt; |
| 6849 | char *lgot_masks; |
| 6850 | local_plt |
| 6851 | = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); |
| 6852 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 6853 | tls_mask = lgot_masks[r_symndx]; |
| 6854 | } |
| 6855 | |
| 6856 | /* Ensure reloc mapping code below stays sane. */ |
| 6857 | if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) |
| 6858 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) |
| 6859 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) |
| 6860 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) |
| 6861 | || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) |
| 6862 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) |
| 6863 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) |
| 6864 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) |
| 6865 | abort (); |
| 6866 | switch (r_type) |
| 6867 | { |
| 6868 | default: |
| 6869 | break; |
| 6870 | |
| 6871 | case R_PPC_GOT_TPREL16: |
| 6872 | case R_PPC_GOT_TPREL16_LO: |
| 6873 | if ((tls_mask & TLS_TLS) != 0 |
| 6874 | && (tls_mask & TLS_TPREL) == 0) |
| 6875 | { |
| 6876 | bfd_vma insn; |
| 6877 | |
| 6878 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); |
| 6879 | insn &= 31 << 21; |
| 6880 | insn |= 0x3c020000; /* addis 0,2,0 */ |
| 6881 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); |
| 6882 | r_type = R_PPC_TPREL16_HA; |
| 6883 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 6884 | } |
| 6885 | break; |
| 6886 | |
| 6887 | case R_PPC_TLS: |
| 6888 | if ((tls_mask & TLS_TLS) != 0 |
| 6889 | && (tls_mask & TLS_TPREL) == 0) |
| 6890 | { |
| 6891 | bfd_vma insn; |
| 6892 | |
| 6893 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 6894 | insn = _bfd_elf_ppc_at_tls_transform (insn, 2); |
| 6895 | if (insn == 0) |
| 6896 | abort (); |
| 6897 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 6898 | r_type = R_PPC_TPREL16_LO; |
| 6899 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 6900 | |
| 6901 | /* Was PPC_TLS which sits on insn boundary, now |
| 6902 | PPC_TPREL16_LO which is at low-order half-word. */ |
| 6903 | rel->r_offset += d_offset; |
| 6904 | } |
| 6905 | break; |
| 6906 | |
| 6907 | case R_PPC_GOT_TLSGD16_HI: |
| 6908 | case R_PPC_GOT_TLSGD16_HA: |
| 6909 | tls_gd = TLS_TPRELGD; |
| 6910 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 6911 | goto tls_gdld_hi; |
| 6912 | break; |
| 6913 | |
| 6914 | case R_PPC_GOT_TLSLD16_HI: |
| 6915 | case R_PPC_GOT_TLSLD16_HA: |
| 6916 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 6917 | { |
| 6918 | tls_gdld_hi: |
| 6919 | if ((tls_mask & tls_gd) != 0) |
| 6920 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 6921 | + R_PPC_GOT_TPREL16); |
| 6922 | else |
| 6923 | { |
| 6924 | bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| 6925 | rel->r_offset -= d_offset; |
| 6926 | r_type = R_PPC_NONE; |
| 6927 | } |
| 6928 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 6929 | } |
| 6930 | break; |
| 6931 | |
| 6932 | case R_PPC_GOT_TLSGD16: |
| 6933 | case R_PPC_GOT_TLSGD16_LO: |
| 6934 | tls_gd = TLS_TPRELGD; |
| 6935 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 6936 | goto tls_ldgd_opt; |
| 6937 | break; |
| 6938 | |
| 6939 | case R_PPC_GOT_TLSLD16: |
| 6940 | case R_PPC_GOT_TLSLD16_LO: |
| 6941 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 6942 | { |
| 6943 | unsigned int insn1, insn2; |
| 6944 | bfd_vma offset; |
| 6945 | |
| 6946 | tls_ldgd_opt: |
| 6947 | offset = (bfd_vma) -1; |
| 6948 | /* If not using the newer R_PPC_TLSGD/LD to mark |
| 6949 | __tls_get_addr calls, we must trust that the call |
| 6950 | stays with its arg setup insns, ie. that the next |
| 6951 | reloc is the __tls_get_addr call associated with |
| 6952 | the current reloc. Edit both insns. */ |
| 6953 | if (input_section->has_tls_get_addr_call |
| 6954 | && rel + 1 < relend |
| 6955 | && branch_reloc_hash_match (input_bfd, rel + 1, |
| 6956 | htab->tls_get_addr)) |
| 6957 | offset = rel[1].r_offset; |
| 6958 | if ((tls_mask & tls_gd) != 0) |
| 6959 | { |
| 6960 | /* IE */ |
| 6961 | insn1 = bfd_get_32 (output_bfd, |
| 6962 | contents + rel->r_offset - d_offset); |
| 6963 | insn1 &= (1 << 26) - 1; |
| 6964 | insn1 |= 32 << 26; /* lwz */ |
| 6965 | if (offset != (bfd_vma) -1) |
| 6966 | { |
| 6967 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 6968 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 6969 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 6970 | } |
| 6971 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 6972 | + R_PPC_GOT_TPREL16); |
| 6973 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 6974 | } |
| 6975 | else |
| 6976 | { |
| 6977 | /* LE */ |
| 6978 | insn1 = 0x3c620000; /* addis 3,2,0 */ |
| 6979 | if (tls_gd == 0) |
| 6980 | { |
| 6981 | /* Was an LD reloc. */ |
| 6982 | for (r_symndx = 0; |
| 6983 | r_symndx < symtab_hdr->sh_info; |
| 6984 | r_symndx++) |
| 6985 | if (local_sections[r_symndx] == sec) |
| 6986 | break; |
| 6987 | if (r_symndx >= symtab_hdr->sh_info) |
| 6988 | r_symndx = 0; |
| 6989 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 6990 | if (r_symndx != 0) |
| 6991 | rel->r_addend -= (local_syms[r_symndx].st_value |
| 6992 | + sec->output_offset |
| 6993 | + sec->output_section->vma); |
| 6994 | } |
| 6995 | r_type = R_PPC_TPREL16_HA; |
| 6996 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 6997 | if (offset != (bfd_vma) -1) |
| 6998 | { |
| 6999 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); |
| 7000 | rel[1].r_offset = offset + d_offset; |
| 7001 | rel[1].r_addend = rel->r_addend; |
| 7002 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7003 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7004 | } |
| 7005 | } |
| 7006 | bfd_put_32 (output_bfd, insn1, |
| 7007 | contents + rel->r_offset - d_offset); |
| 7008 | if (tls_gd == 0) |
| 7009 | { |
| 7010 | /* We changed the symbol on an LD reloc. Start over |
| 7011 | in order to get h, sym, sec etc. right. */ |
| 7012 | rel--; |
| 7013 | continue; |
| 7014 | } |
| 7015 | } |
| 7016 | break; |
| 7017 | |
| 7018 | case R_PPC_TLSGD: |
| 7019 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7020 | { |
| 7021 | unsigned int insn2; |
| 7022 | bfd_vma offset = rel->r_offset; |
| 7023 | |
| 7024 | if ((tls_mask & TLS_TPRELGD) != 0) |
| 7025 | { |
| 7026 | /* IE */ |
| 7027 | r_type = R_PPC_NONE; |
| 7028 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 7029 | } |
| 7030 | else |
| 7031 | { |
| 7032 | /* LE */ |
| 7033 | r_type = R_PPC_TPREL16_LO; |
| 7034 | rel->r_offset += d_offset; |
| 7035 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7036 | } |
| 7037 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7038 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7039 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 7040 | BFD_ASSERT (offset == rel[1].r_offset); |
| 7041 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7042 | } |
| 7043 | break; |
| 7044 | |
| 7045 | case R_PPC_TLSLD: |
| 7046 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7047 | { |
| 7048 | unsigned int insn2; |
| 7049 | |
| 7050 | for (r_symndx = 0; |
| 7051 | r_symndx < symtab_hdr->sh_info; |
| 7052 | r_symndx++) |
| 7053 | if (local_sections[r_symndx] == sec) |
| 7054 | break; |
| 7055 | if (r_symndx >= symtab_hdr->sh_info) |
| 7056 | r_symndx = 0; |
| 7057 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7058 | if (r_symndx != 0) |
| 7059 | rel->r_addend -= (local_syms[r_symndx].st_value |
| 7060 | + sec->output_offset |
| 7061 | + sec->output_section->vma); |
| 7062 | |
| 7063 | rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); |
| 7064 | rel->r_offset += d_offset; |
| 7065 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7066 | bfd_put_32 (output_bfd, insn2, |
| 7067 | contents + rel->r_offset - d_offset); |
| 7068 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 7069 | BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); |
| 7070 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7071 | rel--; |
| 7072 | continue; |
| 7073 | } |
| 7074 | break; |
| 7075 | } |
| 7076 | |
| 7077 | /* Handle other relocations that tweak non-addend part of insn. */ |
| 7078 | branch_bit = 0; |
| 7079 | switch (r_type) |
| 7080 | { |
| 7081 | default: |
| 7082 | break; |
| 7083 | |
| 7084 | /* Branch taken prediction relocations. */ |
| 7085 | case R_PPC_ADDR14_BRTAKEN: |
| 7086 | case R_PPC_REL14_BRTAKEN: |
| 7087 | branch_bit = BRANCH_PREDICT_BIT; |
| 7088 | /* Fall thru */ |
| 7089 | |
| 7090 | /* Branch not taken prediction relocations. */ |
| 7091 | case R_PPC_ADDR14_BRNTAKEN: |
| 7092 | case R_PPC_REL14_BRNTAKEN: |
| 7093 | { |
| 7094 | bfd_vma insn; |
| 7095 | |
| 7096 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7097 | insn &= ~BRANCH_PREDICT_BIT; |
| 7098 | insn |= branch_bit; |
| 7099 | |
| 7100 | from = (rel->r_offset |
| 7101 | + input_section->output_offset |
| 7102 | + input_section->output_section->vma); |
| 7103 | |
| 7104 | /* Invert 'y' bit if not the default. */ |
| 7105 | if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) |
| 7106 | insn ^= BRANCH_PREDICT_BIT; |
| 7107 | |
| 7108 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 7109 | break; |
| 7110 | } |
| 7111 | } |
| 7112 | |
| 7113 | ifunc = NULL; |
| 7114 | if (!htab->is_vxworks) |
| 7115 | { |
| 7116 | struct plt_entry *ent; |
| 7117 | |
| 7118 | if (h != NULL) |
| 7119 | { |
| 7120 | if (h->type == STT_GNU_IFUNC) |
| 7121 | ifunc = &h->plt.plist; |
| 7122 | } |
| 7123 | else if (local_got_offsets != NULL |
| 7124 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 7125 | { |
| 7126 | struct plt_entry **local_plt; |
| 7127 | |
| 7128 | local_plt = (struct plt_entry **) (local_got_offsets |
| 7129 | + symtab_hdr->sh_info); |
| 7130 | ifunc = local_plt + r_symndx; |
| 7131 | } |
| 7132 | |
| 7133 | ent = NULL; |
| 7134 | if (ifunc != NULL |
| 7135 | && (!info->shared |
| 7136 | || is_branch_reloc (r_type))) |
| 7137 | { |
| 7138 | addend = 0; |
| 7139 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 7140 | addend = rel->r_addend; |
| 7141 | ent = find_plt_ent (ifunc, got2, addend); |
| 7142 | } |
| 7143 | if (ent != NULL) |
| 7144 | { |
| 7145 | if (h == NULL && (ent->plt.offset & 1) == 0) |
| 7146 | { |
| 7147 | Elf_Internal_Rela rela; |
| 7148 | bfd_byte *loc; |
| 7149 | |
| 7150 | rela.r_offset = (htab->iplt->output_section->vma |
| 7151 | + htab->iplt->output_offset |
| 7152 | + ent->plt.offset); |
| 7153 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 7154 | rela.r_addend = relocation; |
| 7155 | loc = htab->reliplt->contents; |
| 7156 | loc += (htab->reliplt->reloc_count++ |
| 7157 | * sizeof (Elf32_External_Rela)); |
| 7158 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 7159 | |
| 7160 | ent->plt.offset |= 1; |
| 7161 | } |
| 7162 | if (h == NULL && (ent->glink_offset & 1) == 0) |
| 7163 | { |
| 7164 | unsigned char *p = ((unsigned char *) htab->glink->contents |
| 7165 | + ent->glink_offset); |
| 7166 | write_glink_stub (ent, htab->iplt, p, info); |
| 7167 | ent->glink_offset |= 1; |
| 7168 | } |
| 7169 | |
| 7170 | unresolved_reloc = FALSE; |
| 7171 | if (htab->plt_type == PLT_NEW |
| 7172 | || !htab->elf.dynamic_sections_created |
| 7173 | || h == NULL) |
| 7174 | relocation = (htab->glink->output_section->vma |
| 7175 | + htab->glink->output_offset |
| 7176 | + (ent->glink_offset & ~1)); |
| 7177 | else |
| 7178 | relocation = (htab->plt->output_section->vma |
| 7179 | + htab->plt->output_offset |
| 7180 | + ent->plt.offset); |
| 7181 | } |
| 7182 | } |
| 7183 | |
| 7184 | addend = rel->r_addend; |
| 7185 | tls_type = 0; |
| 7186 | howto = NULL; |
| 7187 | if (r_type < R_PPC_max) |
| 7188 | howto = ppc_elf_howto_table[r_type]; |
| 7189 | switch (r_type) |
| 7190 | { |
| 7191 | default: |
| 7192 | (*_bfd_error_handler) |
| 7193 | (_("%B: unknown relocation type %d for symbol %s"), |
| 7194 | input_bfd, (int) r_type, sym_name); |
| 7195 | |
| 7196 | bfd_set_error (bfd_error_bad_value); |
| 7197 | ret = FALSE; |
| 7198 | continue; |
| 7199 | |
| 7200 | case R_PPC_NONE: |
| 7201 | case R_PPC_TLS: |
| 7202 | case R_PPC_TLSGD: |
| 7203 | case R_PPC_TLSLD: |
| 7204 | case R_PPC_EMB_MRKREF: |
| 7205 | case R_PPC_GNU_VTINHERIT: |
| 7206 | case R_PPC_GNU_VTENTRY: |
| 7207 | continue; |
| 7208 | |
| 7209 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 7210 | address in the GOT as relocation value instead of the |
| 7211 | symbol's value itself. Also, create a GOT entry for the |
| 7212 | symbol and put the symbol value there. */ |
| 7213 | case R_PPC_GOT_TLSGD16: |
| 7214 | case R_PPC_GOT_TLSGD16_LO: |
| 7215 | case R_PPC_GOT_TLSGD16_HI: |
| 7216 | case R_PPC_GOT_TLSGD16_HA: |
| 7217 | tls_type = TLS_TLS | TLS_GD; |
| 7218 | goto dogot; |
| 7219 | |
| 7220 | case R_PPC_GOT_TLSLD16: |
| 7221 | case R_PPC_GOT_TLSLD16_LO: |
| 7222 | case R_PPC_GOT_TLSLD16_HI: |
| 7223 | case R_PPC_GOT_TLSLD16_HA: |
| 7224 | tls_type = TLS_TLS | TLS_LD; |
| 7225 | goto dogot; |
| 7226 | |
| 7227 | case R_PPC_GOT_TPREL16: |
| 7228 | case R_PPC_GOT_TPREL16_LO: |
| 7229 | case R_PPC_GOT_TPREL16_HI: |
| 7230 | case R_PPC_GOT_TPREL16_HA: |
| 7231 | tls_type = TLS_TLS | TLS_TPREL; |
| 7232 | goto dogot; |
| 7233 | |
| 7234 | case R_PPC_GOT_DTPREL16: |
| 7235 | case R_PPC_GOT_DTPREL16_LO: |
| 7236 | case R_PPC_GOT_DTPREL16_HI: |
| 7237 | case R_PPC_GOT_DTPREL16_HA: |
| 7238 | tls_type = TLS_TLS | TLS_DTPREL; |
| 7239 | goto dogot; |
| 7240 | |
| 7241 | case R_PPC_GOT16: |
| 7242 | case R_PPC_GOT16_LO: |
| 7243 | case R_PPC_GOT16_HI: |
| 7244 | case R_PPC_GOT16_HA: |
| 7245 | tls_mask = 0; |
| 7246 | dogot: |
| 7247 | { |
| 7248 | /* Relocation is to the entry for this symbol in the global |
| 7249 | offset table. */ |
| 7250 | bfd_vma off; |
| 7251 | bfd_vma *offp; |
| 7252 | unsigned long indx; |
| 7253 | |
| 7254 | if (htab->got == NULL) |
| 7255 | abort (); |
| 7256 | |
| 7257 | indx = 0; |
| 7258 | if (tls_type == (TLS_TLS | TLS_LD) |
| 7259 | && (h == NULL |
| 7260 | || !h->def_dynamic)) |
| 7261 | offp = &htab->tlsld_got.offset; |
| 7262 | else if (h != NULL) |
| 7263 | { |
| 7264 | bfd_boolean dyn; |
| 7265 | dyn = htab->elf.dynamic_sections_created; |
| 7266 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 7267 | || (info->shared |
| 7268 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
| 7269 | /* This is actually a static link, or it is a |
| 7270 | -Bsymbolic link and the symbol is defined |
| 7271 | locally, or the symbol was forced to be local |
| 7272 | because of a version file. */ |
| 7273 | ; |
| 7274 | else |
| 7275 | { |
| 7276 | indx = h->dynindx; |
| 7277 | unresolved_reloc = FALSE; |
| 7278 | } |
| 7279 | offp = &h->got.offset; |
| 7280 | } |
| 7281 | else |
| 7282 | { |
| 7283 | if (local_got_offsets == NULL) |
| 7284 | abort (); |
| 7285 | offp = &local_got_offsets[r_symndx]; |
| 7286 | } |
| 7287 | |
| 7288 | /* The offset must always be a multiple of 4. We use the |
| 7289 | least significant bit to record whether we have already |
| 7290 | processed this entry. */ |
| 7291 | off = *offp; |
| 7292 | if ((off & 1) != 0) |
| 7293 | off &= ~1; |
| 7294 | else |
| 7295 | { |
| 7296 | unsigned int tls_m = (tls_mask |
| 7297 | & (TLS_LD | TLS_GD | TLS_DTPREL |
| 7298 | | TLS_TPREL | TLS_TPRELGD)); |
| 7299 | |
| 7300 | if (offp == &htab->tlsld_got.offset) |
| 7301 | tls_m = TLS_LD; |
| 7302 | else if (h == NULL |
| 7303 | || !h->def_dynamic) |
| 7304 | tls_m &= ~TLS_LD; |
| 7305 | |
| 7306 | /* We might have multiple got entries for this sym. |
| 7307 | Initialize them all. */ |
| 7308 | do |
| 7309 | { |
| 7310 | int tls_ty = 0; |
| 7311 | |
| 7312 | if ((tls_m & TLS_LD) != 0) |
| 7313 | { |
| 7314 | tls_ty = TLS_TLS | TLS_LD; |
| 7315 | tls_m &= ~TLS_LD; |
| 7316 | } |
| 7317 | else if ((tls_m & TLS_GD) != 0) |
| 7318 | { |
| 7319 | tls_ty = TLS_TLS | TLS_GD; |
| 7320 | tls_m &= ~TLS_GD; |
| 7321 | } |
| 7322 | else if ((tls_m & TLS_DTPREL) != 0) |
| 7323 | { |
| 7324 | tls_ty = TLS_TLS | TLS_DTPREL; |
| 7325 | tls_m &= ~TLS_DTPREL; |
| 7326 | } |
| 7327 | else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 7328 | { |
| 7329 | tls_ty = TLS_TLS | TLS_TPREL; |
| 7330 | tls_m = 0; |
| 7331 | } |
| 7332 | |
| 7333 | /* Generate relocs for the dynamic linker. */ |
| 7334 | if ((info->shared || indx != 0) |
| 7335 | && (offp == &htab->tlsld_got.offset |
| 7336 | || h == NULL |
| 7337 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 7338 | || h->root.type != bfd_link_hash_undefweak)) |
| 7339 | { |
| 7340 | asection *rsec = htab->relgot; |
| 7341 | bfd_byte * loc; |
| 7342 | |
| 7343 | outrel.r_offset = (htab->got->output_section->vma |
| 7344 | + htab->got->output_offset |
| 7345 | + off); |
| 7346 | outrel.r_addend = 0; |
| 7347 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 7348 | { |
| 7349 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); |
| 7350 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 7351 | { |
| 7352 | loc = rsec->contents; |
| 7353 | loc += (rsec->reloc_count++ |
| 7354 | * sizeof (Elf32_External_Rela)); |
| 7355 | bfd_elf32_swap_reloca_out (output_bfd, |
| 7356 | &outrel, loc); |
| 7357 | outrel.r_offset += 4; |
| 7358 | outrel.r_info |
| 7359 | = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 7360 | } |
| 7361 | } |
| 7362 | else if (tls_ty == (TLS_TLS | TLS_DTPREL)) |
| 7363 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 7364 | else if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 7365 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); |
| 7366 | else if (indx != 0) |
| 7367 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); |
| 7368 | else if (ifunc != NULL) |
| 7369 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 7370 | else |
| 7371 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 7372 | if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) |
| 7373 | { |
| 7374 | outrel.r_addend += relocation; |
| 7375 | if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| 7376 | outrel.r_addend -= htab->elf.tls_sec->vma; |
| 7377 | } |
| 7378 | loc = rsec->contents; |
| 7379 | loc += (rsec->reloc_count++ |
| 7380 | * sizeof (Elf32_External_Rela)); |
| 7381 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 7382 | } |
| 7383 | |
| 7384 | /* Init the .got section contents if we're not |
| 7385 | emitting a reloc. */ |
| 7386 | else |
| 7387 | { |
| 7388 | bfd_vma value = relocation; |
| 7389 | |
| 7390 | if (tls_ty == (TLS_TLS | TLS_LD)) |
| 7391 | value = 1; |
| 7392 | else if (tls_ty != 0) |
| 7393 | { |
| 7394 | value -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7395 | if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 7396 | value += DTP_OFFSET - TP_OFFSET; |
| 7397 | |
| 7398 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 7399 | { |
| 7400 | bfd_put_32 (output_bfd, value, |
| 7401 | htab->got->contents + off + 4); |
| 7402 | value = 1; |
| 7403 | } |
| 7404 | } |
| 7405 | bfd_put_32 (output_bfd, value, |
| 7406 | htab->got->contents + off); |
| 7407 | } |
| 7408 | |
| 7409 | off += 4; |
| 7410 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 7411 | off += 4; |
| 7412 | } |
| 7413 | while (tls_m != 0); |
| 7414 | |
| 7415 | off = *offp; |
| 7416 | *offp = off | 1; |
| 7417 | } |
| 7418 | |
| 7419 | if (off >= (bfd_vma) -2) |
| 7420 | abort (); |
| 7421 | |
| 7422 | if ((tls_type & TLS_TLS) != 0) |
| 7423 | { |
| 7424 | if (tls_type != (TLS_TLS | TLS_LD)) |
| 7425 | { |
| 7426 | if ((tls_mask & TLS_LD) != 0 |
| 7427 | && !(h == NULL |
| 7428 | || !h->def_dynamic)) |
| 7429 | off += 8; |
| 7430 | if (tls_type != (TLS_TLS | TLS_GD)) |
| 7431 | { |
| 7432 | if ((tls_mask & TLS_GD) != 0) |
| 7433 | off += 8; |
| 7434 | if (tls_type != (TLS_TLS | TLS_DTPREL)) |
| 7435 | { |
| 7436 | if ((tls_mask & TLS_DTPREL) != 0) |
| 7437 | off += 4; |
| 7438 | } |
| 7439 | } |
| 7440 | } |
| 7441 | } |
| 7442 | |
| 7443 | relocation = (htab->got->output_section->vma |
| 7444 | + htab->got->output_offset |
| 7445 | + off |
| 7446 | - SYM_VAL (htab->elf.hgot)); |
| 7447 | |
| 7448 | /* Addends on got relocations don't make much sense. |
| 7449 | x+off@got is actually x@got+off, and since the got is |
| 7450 | generated by a hash table traversal, the value in the |
| 7451 | got at entry m+n bears little relation to the entry m. */ |
| 7452 | if (addend != 0) |
| 7453 | (*_bfd_error_handler) |
| 7454 | (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"), |
| 7455 | input_bfd, |
| 7456 | input_section, |
| 7457 | (long) rel->r_offset, |
| 7458 | howto->name, |
| 7459 | sym_name); |
| 7460 | } |
| 7461 | break; |
| 7462 | |
| 7463 | /* Relocations that need no special processing. */ |
| 7464 | case R_PPC_LOCAL24PC: |
| 7465 | /* It makes no sense to point a local relocation |
| 7466 | at a symbol not in this object. */ |
| 7467 | if (unresolved_reloc) |
| 7468 | { |
| 7469 | if (! (*info->callbacks->undefined_symbol) (info, |
| 7470 | h->root.root.string, |
| 7471 | input_bfd, |
| 7472 | input_section, |
| 7473 | rel->r_offset, |
| 7474 | TRUE)) |
| 7475 | return FALSE; |
| 7476 | continue; |
| 7477 | } |
| 7478 | break; |
| 7479 | |
| 7480 | case R_PPC_DTPREL16: |
| 7481 | case R_PPC_DTPREL16_LO: |
| 7482 | case R_PPC_DTPREL16_HI: |
| 7483 | case R_PPC_DTPREL16_HA: |
| 7484 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7485 | break; |
| 7486 | |
| 7487 | /* Relocations that may need to be propagated if this is a shared |
| 7488 | object. */ |
| 7489 | case R_PPC_TPREL16: |
| 7490 | case R_PPC_TPREL16_LO: |
| 7491 | case R_PPC_TPREL16_HI: |
| 7492 | case R_PPC_TPREL16_HA: |
| 7493 | if (h != NULL |
| 7494 | && h->root.type == bfd_link_hash_undefweak |
| 7495 | && h->dynindx == -1) |
| 7496 | { |
| 7497 | /* Make this relocation against an undefined weak symbol |
| 7498 | resolve to zero. This is really just a tweak, since |
| 7499 | code using weak externs ought to check that they are |
| 7500 | defined before using them. */ |
| 7501 | bfd_byte *p = contents + rel->r_offset - d_offset; |
| 7502 | unsigned int insn = bfd_get_32 (output_bfd, p); |
| 7503 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); |
| 7504 | if (insn != 0) |
| 7505 | bfd_put_32 (output_bfd, insn, p); |
| 7506 | break; |
| 7507 | } |
| 7508 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 7509 | /* The TPREL16 relocs shouldn't really be used in shared |
| 7510 | libs as they will result in DT_TEXTREL being set, but |
| 7511 | support them anyway. */ |
| 7512 | goto dodyn; |
| 7513 | |
| 7514 | case R_PPC_TPREL32: |
| 7515 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 7516 | goto dodyn; |
| 7517 | |
| 7518 | case R_PPC_DTPREL32: |
| 7519 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7520 | goto dodyn; |
| 7521 | |
| 7522 | case R_PPC_DTPMOD32: |
| 7523 | relocation = 1; |
| 7524 | addend = 0; |
| 7525 | goto dodyn; |
| 7526 | |
| 7527 | case R_PPC_REL16: |
| 7528 | case R_PPC_REL16_LO: |
| 7529 | case R_PPC_REL16_HI: |
| 7530 | case R_PPC_REL16_HA: |
| 7531 | break; |
| 7532 | |
| 7533 | case R_PPC_REL32: |
| 7534 | if (h == NULL || h == htab->elf.hgot) |
| 7535 | break; |
| 7536 | /* fall through */ |
| 7537 | |
| 7538 | case R_PPC_ADDR32: |
| 7539 | case R_PPC_ADDR16: |
| 7540 | case R_PPC_ADDR16_LO: |
| 7541 | case R_PPC_ADDR16_HI: |
| 7542 | case R_PPC_ADDR16_HA: |
| 7543 | case R_PPC_UADDR32: |
| 7544 | case R_PPC_UADDR16: |
| 7545 | goto dodyn; |
| 7546 | |
| 7547 | case R_PPC_REL24: |
| 7548 | case R_PPC_REL14: |
| 7549 | case R_PPC_REL14_BRTAKEN: |
| 7550 | case R_PPC_REL14_BRNTAKEN: |
| 7551 | /* If these relocations are not to a named symbol, they can be |
| 7552 | handled right here, no need to bother the dynamic linker. */ |
| 7553 | if (SYMBOL_CALLS_LOCAL (info, h) |
| 7554 | || h == htab->elf.hgot) |
| 7555 | break; |
| 7556 | /* fall through */ |
| 7557 | |
| 7558 | case R_PPC_ADDR24: |
| 7559 | case R_PPC_ADDR14: |
| 7560 | case R_PPC_ADDR14_BRTAKEN: |
| 7561 | case R_PPC_ADDR14_BRNTAKEN: |
| 7562 | if (h != NULL && !info->shared) |
| 7563 | break; |
| 7564 | /* fall through */ |
| 7565 | |
| 7566 | dodyn: |
| 7567 | if ((input_section->flags & SEC_ALLOC) == 0 |
| 7568 | || is_vxworks_tls) |
| 7569 | break; |
| 7570 | |
| 7571 | if ((info->shared |
| 7572 | && !(h != NULL |
| 7573 | && ((h->root.type == bfd_link_hash_undefined |
| 7574 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN |
| 7575 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) |
| 7576 | || (h->root.type == bfd_link_hash_undefweak |
| 7577 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) |
| 7578 | && (must_be_dyn_reloc (info, r_type) |
| 7579 | || !SYMBOL_CALLS_LOCAL (info, h))) |
| 7580 | || (ELIMINATE_COPY_RELOCS |
| 7581 | && !info->shared |
| 7582 | && h != NULL |
| 7583 | && h->dynindx != -1 |
| 7584 | && !h->non_got_ref |
| 7585 | && !h->def_regular)) |
| 7586 | { |
| 7587 | int skip; |
| 7588 | bfd_byte * loc; |
| 7589 | #ifdef DEBUG |
| 7590 | fprintf (stderr, "ppc_elf_relocate_section needs to " |
| 7591 | "create relocation for %s\n", |
| 7592 | (h && h->root.root.string |
| 7593 | ? h->root.root.string : "<unknown>")); |
| 7594 | #endif |
| 7595 | |
| 7596 | /* When generating a shared object, these relocations |
| 7597 | are copied into the output file to be resolved at run |
| 7598 | time. */ |
| 7599 | if (sreloc == NULL) |
| 7600 | { |
| 7601 | sreloc = elf_section_data (input_section)->sreloc; |
| 7602 | if (!htab->elf.dynamic_sections_created) |
| 7603 | sreloc = htab->reliplt; |
| 7604 | if (sreloc == NULL) |
| 7605 | return FALSE; |
| 7606 | } |
| 7607 | |
| 7608 | skip = 0; |
| 7609 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, |
| 7610 | input_section, |
| 7611 | rel->r_offset); |
| 7612 | if (outrel.r_offset == (bfd_vma) -1 |
| 7613 | || outrel.r_offset == (bfd_vma) -2) |
| 7614 | skip = (int) outrel.r_offset; |
| 7615 | outrel.r_offset += (input_section->output_section->vma |
| 7616 | + input_section->output_offset); |
| 7617 | |
| 7618 | if (skip) |
| 7619 | memset (&outrel, 0, sizeof outrel); |
| 7620 | else if ((h != NULL |
| 7621 | && (h->root.type == bfd_link_hash_undefined |
| 7622 | || h->root.type == bfd_link_hash_undefweak)) |
| 7623 | || !SYMBOL_REFERENCES_LOCAL (info, h)) |
| 7624 | { |
| 7625 | unresolved_reloc = FALSE; |
| 7626 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 7627 | outrel.r_addend = rel->r_addend; |
| 7628 | } |
| 7629 | else |
| 7630 | { |
| 7631 | outrel.r_addend = relocation + rel->r_addend; |
| 7632 | |
| 7633 | if (r_type != R_PPC_ADDR32) |
| 7634 | { |
| 7635 | long indx = 0; |
| 7636 | |
| 7637 | if (ifunc != NULL) |
| 7638 | { |
| 7639 | /* If we get here when building a static |
| 7640 | executable, then the libc startup function |
| 7641 | responsible for applying indirect function |
| 7642 | relocations is going to complain about |
| 7643 | the reloc type. |
| 7644 | If we get here when building a dynamic |
| 7645 | executable, it will be because we have |
| 7646 | a text relocation. The dynamic loader |
| 7647 | will set the text segment writable and |
| 7648 | non-executable to apply text relocations. |
| 7649 | So we'll segfault when trying to run the |
| 7650 | indirection function to resolve the reloc. */ |
| 7651 | (*_bfd_error_handler) |
| 7652 | (_("%B(%A+0x%lx): relocation %s for indirect " |
| 7653 | "function %s unsupported"), |
| 7654 | input_bfd, |
| 7655 | input_section, |
| 7656 | (long) rel->r_offset, |
| 7657 | howto->name, |
| 7658 | sym_name); |
| 7659 | ret = FALSE; |
| 7660 | } |
| 7661 | else if (r_symndx == 0 || bfd_is_abs_section (sec)) |
| 7662 | ; |
| 7663 | else if (sec == NULL || sec->owner == NULL) |
| 7664 | { |
| 7665 | bfd_set_error (bfd_error_bad_value); |
| 7666 | ret = FALSE; |
| 7667 | } |
| 7668 | else |
| 7669 | { |
| 7670 | asection *osec; |
| 7671 | |
| 7672 | /* We are turning this relocation into one |
| 7673 | against a section symbol. It would be |
| 7674 | proper to subtract the symbol's value, |
| 7675 | osec->vma, from the emitted reloc addend, |
| 7676 | but ld.so expects buggy relocs. |
| 7677 | FIXME: Why not always use a zero index? */ |
| 7678 | osec = sec->output_section; |
| 7679 | indx = elf_section_data (osec)->dynindx; |
| 7680 | if (indx == 0) |
| 7681 | { |
| 7682 | osec = htab->elf.text_index_section; |
| 7683 | indx = elf_section_data (osec)->dynindx; |
| 7684 | } |
| 7685 | BFD_ASSERT (indx != 0); |
| 7686 | #ifdef DEBUG |
| 7687 | if (indx == 0) |
| 7688 | printf ("indx=%ld section=%s flags=%08x name=%s\n", |
| 7689 | indx, osec->name, osec->flags, |
| 7690 | h->root.root.string); |
| 7691 | #endif |
| 7692 | } |
| 7693 | |
| 7694 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 7695 | } |
| 7696 | else if (ifunc != NULL) |
| 7697 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 7698 | else |
| 7699 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 7700 | } |
| 7701 | |
| 7702 | loc = sreloc->contents; |
| 7703 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 7704 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 7705 | |
| 7706 | if (skip == -1) |
| 7707 | continue; |
| 7708 | |
| 7709 | /* This reloc will be computed at runtime. We clear the memory |
| 7710 | so that it contains predictable value. */ |
| 7711 | if (! skip |
| 7712 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 7713 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) |
| 7714 | { |
| 7715 | relocation = howto->pc_relative ? outrel.r_offset : 0; |
| 7716 | addend = 0; |
| 7717 | break; |
| 7718 | } |
| 7719 | } |
| 7720 | break; |
| 7721 | |
| 7722 | case R_PPC_RELAX_PLT: |
| 7723 | case R_PPC_RELAX_PLTREL24: |
| 7724 | if (h != NULL) |
| 7725 | { |
| 7726 | struct plt_entry *ent; |
| 7727 | bfd_vma got2_addend = 0; |
| 7728 | |
| 7729 | if (r_type == R_PPC_RELAX_PLTREL24) |
| 7730 | { |
| 7731 | if (info->shared) |
| 7732 | got2_addend = addend; |
| 7733 | addend = 0; |
| 7734 | } |
| 7735 | ent = find_plt_ent (&h->plt.plist, got2, got2_addend); |
| 7736 | if (htab->plt_type == PLT_NEW) |
| 7737 | relocation = (htab->glink->output_section->vma |
| 7738 | + htab->glink->output_offset |
| 7739 | + ent->glink_offset); |
| 7740 | else |
| 7741 | relocation = (htab->plt->output_section->vma |
| 7742 | + htab->plt->output_offset |
| 7743 | + ent->plt.offset); |
| 7744 | } |
| 7745 | /* Fall thru */ |
| 7746 | |
| 7747 | case R_PPC_RELAX: |
| 7748 | if (info->shared) |
| 7749 | relocation -= (input_section->output_section->vma |
| 7750 | + input_section->output_offset |
| 7751 | + rel->r_offset - 4); |
| 7752 | |
| 7753 | { |
| 7754 | unsigned long t0; |
| 7755 | unsigned long t1; |
| 7756 | |
| 7757 | t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7758 | t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); |
| 7759 | |
| 7760 | /* We're clearing the bits for R_PPC_ADDR16_HA |
| 7761 | and R_PPC_ADDR16_LO here. */ |
| 7762 | t0 &= ~0xffff; |
| 7763 | t1 &= ~0xffff; |
| 7764 | |
| 7765 | /* t0 is HA, t1 is LO */ |
| 7766 | relocation += addend; |
| 7767 | t0 |= ((relocation + 0x8000) >> 16) & 0xffff; |
| 7768 | t1 |= relocation & 0xffff; |
| 7769 | |
| 7770 | bfd_put_32 (output_bfd, t0, contents + rel->r_offset); |
| 7771 | bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); |
| 7772 | |
| 7773 | /* Rewrite the reloc and convert one of the trailing nop |
| 7774 | relocs to describe this relocation. */ |
| 7775 | BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); |
| 7776 | /* The relocs are at the bottom 2 bytes */ |
| 7777 | rel[0].r_offset += 2; |
| 7778 | memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); |
| 7779 | rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); |
| 7780 | rel[1].r_offset += 4; |
| 7781 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); |
| 7782 | rel++; |
| 7783 | } |
| 7784 | continue; |
| 7785 | |
| 7786 | /* Indirect .sdata relocation. */ |
| 7787 | case R_PPC_EMB_SDAI16: |
| 7788 | BFD_ASSERT (htab->sdata[0].section != NULL); |
| 7789 | if (!is_static_defined (htab->sdata[0].sym)) |
| 7790 | { |
| 7791 | unresolved_reloc = TRUE; |
| 7792 | break; |
| 7793 | } |
| 7794 | relocation |
| 7795 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], |
| 7796 | h, relocation, rel); |
| 7797 | addend = 0; |
| 7798 | break; |
| 7799 | |
| 7800 | /* Indirect .sdata2 relocation. */ |
| 7801 | case R_PPC_EMB_SDA2I16: |
| 7802 | BFD_ASSERT (htab->sdata[1].section != NULL); |
| 7803 | if (!is_static_defined (htab->sdata[1].sym)) |
| 7804 | { |
| 7805 | unresolved_reloc = TRUE; |
| 7806 | break; |
| 7807 | } |
| 7808 | relocation |
| 7809 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], |
| 7810 | h, relocation, rel); |
| 7811 | addend = 0; |
| 7812 | break; |
| 7813 | |
| 7814 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 7815 | section, not the actual VMA. This is appropriate when generating |
| 7816 | an embedded ELF object, for which the .got section acts like the |
| 7817 | AIX .toc section. */ |
| 7818 | case R_PPC_TOC16: /* phony GOT16 relocations */ |
| 7819 | if (sec == NULL || sec->output_section == NULL) |
| 7820 | { |
| 7821 | unresolved_reloc = TRUE; |
| 7822 | break; |
| 7823 | } |
| 7824 | BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| 7825 | || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0); |
| 7826 | |
| 7827 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 7828 | break; |
| 7829 | |
| 7830 | case R_PPC_PLTREL24: |
| 7831 | if (h == NULL || ifunc != NULL) |
| 7832 | break; |
| 7833 | /* Relocation is to the entry for this symbol in the |
| 7834 | procedure linkage table. */ |
| 7835 | { |
| 7836 | struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, |
| 7837 | info->shared ? addend : 0); |
| 7838 | addend = 0; |
| 7839 | if (ent == NULL |
| 7840 | || htab->plt == NULL) |
| 7841 | { |
| 7842 | /* We didn't make a PLT entry for this symbol. This |
| 7843 | happens when statically linking PIC code, or when |
| 7844 | using -Bsymbolic. */ |
| 7845 | break; |
| 7846 | } |
| 7847 | |
| 7848 | unresolved_reloc = FALSE; |
| 7849 | if (htab->plt_type == PLT_NEW) |
| 7850 | relocation = (htab->glink->output_section->vma |
| 7851 | + htab->glink->output_offset |
| 7852 | + ent->glink_offset); |
| 7853 | else |
| 7854 | relocation = (htab->plt->output_section->vma |
| 7855 | + htab->plt->output_offset |
| 7856 | + ent->plt.offset); |
| 7857 | } |
| 7858 | break; |
| 7859 | |
| 7860 | /* Relocate against _SDA_BASE_. */ |
| 7861 | case R_PPC_SDAREL16: |
| 7862 | { |
| 7863 | const char *name; |
| 7864 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 7865 | |
| 7866 | if (sec == NULL |
| 7867 | || sec->output_section == NULL |
| 7868 | || !is_static_defined (sda)) |
| 7869 | { |
| 7870 | unresolved_reloc = TRUE; |
| 7871 | break; |
| 7872 | } |
| 7873 | addend -= SYM_VAL (sda); |
| 7874 | |
| 7875 | name = bfd_get_section_name (abfd, sec->output_section); |
| 7876 | if (! ((CONST_STRNEQ (name, ".sdata") |
| 7877 | && (name[6] == 0 || name[6] == '.')) |
| 7878 | || (CONST_STRNEQ (name, ".sbss") |
| 7879 | && (name[5] == 0 || name[5] == '.')))) |
| 7880 | { |
| 7881 | (*_bfd_error_handler) |
| 7882 | (_("%B: the target (%s) of a %s relocation is " |
| 7883 | "in the wrong output section (%s)"), |
| 7884 | input_bfd, |
| 7885 | sym_name, |
| 7886 | howto->name, |
| 7887 | name); |
| 7888 | } |
| 7889 | } |
| 7890 | break; |
| 7891 | |
| 7892 | /* Relocate against _SDA2_BASE_. */ |
| 7893 | case R_PPC_EMB_SDA2REL: |
| 7894 | { |
| 7895 | const char *name; |
| 7896 | struct elf_link_hash_entry *sda = htab->sdata[1].sym; |
| 7897 | |
| 7898 | if (sec == NULL |
| 7899 | || sec->output_section == NULL |
| 7900 | || !is_static_defined (sda)) |
| 7901 | { |
| 7902 | unresolved_reloc = TRUE; |
| 7903 | break; |
| 7904 | } |
| 7905 | addend -= SYM_VAL (sda); |
| 7906 | |
| 7907 | name = bfd_get_section_name (abfd, sec->output_section); |
| 7908 | if (! (CONST_STRNEQ (name, ".sdata2") |
| 7909 | || CONST_STRNEQ (name, ".sbss2"))) |
| 7910 | { |
| 7911 | (*_bfd_error_handler) |
| 7912 | (_("%B: the target (%s) of a %s relocation is " |
| 7913 | "in the wrong output section (%s)"), |
| 7914 | input_bfd, |
| 7915 | sym_name, |
| 7916 | howto->name, |
| 7917 | name); |
| 7918 | } |
| 7919 | } |
| 7920 | break; |
| 7921 | |
| 7922 | /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ |
| 7923 | case R_PPC_EMB_SDA21: |
| 7924 | case R_PPC_EMB_RELSDA: |
| 7925 | { |
| 7926 | const char *name; |
| 7927 | int reg; |
| 7928 | struct elf_link_hash_entry *sda = NULL; |
| 7929 | |
| 7930 | if (sec == NULL || sec->output_section == NULL) |
| 7931 | { |
| 7932 | unresolved_reloc = TRUE; |
| 7933 | break; |
| 7934 | } |
| 7935 | |
| 7936 | name = bfd_get_section_name (abfd, sec->output_section); |
| 7937 | if (((CONST_STRNEQ (name, ".sdata") |
| 7938 | && (name[6] == 0 || name[6] == '.')) |
| 7939 | || (CONST_STRNEQ (name, ".sbss") |
| 7940 | && (name[5] == 0 || name[5] == '.')))) |
| 7941 | { |
| 7942 | reg = 13; |
| 7943 | sda = htab->sdata[0].sym; |
| 7944 | } |
| 7945 | else if (CONST_STRNEQ (name, ".sdata2") |
| 7946 | || CONST_STRNEQ (name, ".sbss2")) |
| 7947 | { |
| 7948 | reg = 2; |
| 7949 | sda = htab->sdata[1].sym; |
| 7950 | } |
| 7951 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 |
| 7952 | || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 7953 | { |
| 7954 | reg = 0; |
| 7955 | } |
| 7956 | else |
| 7957 | { |
| 7958 | (*_bfd_error_handler) |
| 7959 | (_("%B: the target (%s) of a %s relocation is " |
| 7960 | "in the wrong output section (%s)"), |
| 7961 | input_bfd, |
| 7962 | sym_name, |
| 7963 | howto->name, |
| 7964 | name); |
| 7965 | |
| 7966 | bfd_set_error (bfd_error_bad_value); |
| 7967 | ret = FALSE; |
| 7968 | continue; |
| 7969 | } |
| 7970 | |
| 7971 | if (sda != NULL) |
| 7972 | { |
| 7973 | if (!is_static_defined (sda)) |
| 7974 | { |
| 7975 | unresolved_reloc = TRUE; |
| 7976 | break; |
| 7977 | } |
| 7978 | addend -= SYM_VAL (sda); |
| 7979 | } |
| 7980 | |
| 7981 | if (r_type == R_PPC_EMB_SDA21) |
| 7982 | { |
| 7983 | bfd_vma insn; /* Fill in register field. */ |
| 7984 | |
| 7985 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7986 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 7987 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 7988 | } |
| 7989 | } |
| 7990 | break; |
| 7991 | |
| 7992 | /* Relocate against the beginning of the section. */ |
| 7993 | case R_PPC_SECTOFF: |
| 7994 | case R_PPC_SECTOFF_LO: |
| 7995 | case R_PPC_SECTOFF_HI: |
| 7996 | case R_PPC_SECTOFF_HA: |
| 7997 | if (sec == NULL || sec->output_section == NULL) |
| 7998 | { |
| 7999 | unresolved_reloc = TRUE; |
| 8000 | break; |
| 8001 | } |
| 8002 | addend -= sec->output_section->vma; |
| 8003 | break; |
| 8004 | |
| 8005 | /* Negative relocations. */ |
| 8006 | case R_PPC_EMB_NADDR32: |
| 8007 | case R_PPC_EMB_NADDR16: |
| 8008 | case R_PPC_EMB_NADDR16_LO: |
| 8009 | case R_PPC_EMB_NADDR16_HI: |
| 8010 | case R_PPC_EMB_NADDR16_HA: |
| 8011 | addend -= 2 * relocation; |
| 8012 | break; |
| 8013 | |
| 8014 | case R_PPC_COPY: |
| 8015 | case R_PPC_GLOB_DAT: |
| 8016 | case R_PPC_JMP_SLOT: |
| 8017 | case R_PPC_RELATIVE: |
| 8018 | case R_PPC_IRELATIVE: |
| 8019 | case R_PPC_PLT32: |
| 8020 | case R_PPC_PLTREL32: |
| 8021 | case R_PPC_PLT16_LO: |
| 8022 | case R_PPC_PLT16_HI: |
| 8023 | case R_PPC_PLT16_HA: |
| 8024 | case R_PPC_ADDR30: |
| 8025 | case R_PPC_EMB_RELSEC16: |
| 8026 | case R_PPC_EMB_RELST_LO: |
| 8027 | case R_PPC_EMB_RELST_HI: |
| 8028 | case R_PPC_EMB_RELST_HA: |
| 8029 | case R_PPC_EMB_BIT_FLD: |
| 8030 | (*_bfd_error_handler) |
| 8031 | (_("%B: relocation %s is not yet supported for symbol %s."), |
| 8032 | input_bfd, |
| 8033 | howto->name, |
| 8034 | sym_name); |
| 8035 | |
| 8036 | bfd_set_error (bfd_error_invalid_operation); |
| 8037 | ret = FALSE; |
| 8038 | continue; |
| 8039 | } |
| 8040 | |
| 8041 | /* Do any further special processing. */ |
| 8042 | switch (r_type) |
| 8043 | { |
| 8044 | default: |
| 8045 | break; |
| 8046 | |
| 8047 | case R_PPC_ADDR16_HA: |
| 8048 | case R_PPC_REL16_HA: |
| 8049 | case R_PPC_SECTOFF_HA: |
| 8050 | case R_PPC_TPREL16_HA: |
| 8051 | case R_PPC_DTPREL16_HA: |
| 8052 | case R_PPC_EMB_NADDR16_HA: |
| 8053 | case R_PPC_EMB_RELST_HA: |
| 8054 | /* It's just possible that this symbol is a weak symbol |
| 8055 | that's not actually defined anywhere. In that case, |
| 8056 | 'sec' would be NULL, and we should leave the symbol |
| 8057 | alone (it will be set to zero elsewhere in the link). */ |
| 8058 | if (sec == NULL) |
| 8059 | break; |
| 8060 | /* Fall thru */ |
| 8061 | |
| 8062 | case R_PPC_PLT16_HA: |
| 8063 | case R_PPC_GOT16_HA: |
| 8064 | case R_PPC_GOT_TLSGD16_HA: |
| 8065 | case R_PPC_GOT_TLSLD16_HA: |
| 8066 | case R_PPC_GOT_TPREL16_HA: |
| 8067 | case R_PPC_GOT_DTPREL16_HA: |
| 8068 | /* Add 0x10000 if sign bit in 0:15 is set. |
| 8069 | Bits 0:15 are not used. */ |
| 8070 | addend += 0x8000; |
| 8071 | break; |
| 8072 | } |
| 8073 | |
| 8074 | #ifdef DEBUG |
| 8075 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " |
| 8076 | "offset = %ld, addend = %ld\n", |
| 8077 | howto->name, |
| 8078 | (int) r_type, |
| 8079 | sym_name, |
| 8080 | r_symndx, |
| 8081 | (long) rel->r_offset, |
| 8082 | (long) addend); |
| 8083 | #endif |
| 8084 | |
| 8085 | if (unresolved_reloc |
| 8086 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 8087 | && h->def_dynamic)) |
| 8088 | { |
| 8089 | (*_bfd_error_handler) |
| 8090 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 8091 | input_bfd, |
| 8092 | input_section, |
| 8093 | (long) rel->r_offset, |
| 8094 | howto->name, |
| 8095 | sym_name); |
| 8096 | ret = FALSE; |
| 8097 | } |
| 8098 | |
| 8099 | r = _bfd_final_link_relocate (howto, |
| 8100 | input_bfd, |
| 8101 | input_section, |
| 8102 | contents, |
| 8103 | rel->r_offset, |
| 8104 | relocation, |
| 8105 | addend); |
| 8106 | |
| 8107 | if (r != bfd_reloc_ok) |
| 8108 | { |
| 8109 | if (r == bfd_reloc_overflow) |
| 8110 | { |
| 8111 | if (warned) |
| 8112 | continue; |
| 8113 | if (h != NULL |
| 8114 | && h->root.type == bfd_link_hash_undefweak |
| 8115 | && howto->pc_relative) |
| 8116 | { |
| 8117 | /* Assume this is a call protected by other code that |
| 8118 | detect the symbol is undefined. If this is the case, |
| 8119 | we can safely ignore the overflow. If not, the |
| 8120 | program is hosed anyway, and a little warning isn't |
| 8121 | going to help. */ |
| 8122 | |
| 8123 | continue; |
| 8124 | } |
| 8125 | |
| 8126 | if (! (*info->callbacks->reloc_overflow) (info, |
| 8127 | (h ? &h->root : NULL), |
| 8128 | sym_name, |
| 8129 | howto->name, |
| 8130 | rel->r_addend, |
| 8131 | input_bfd, |
| 8132 | input_section, |
| 8133 | rel->r_offset)) |
| 8134 | return FALSE; |
| 8135 | } |
| 8136 | else |
| 8137 | { |
| 8138 | (*_bfd_error_handler) |
| 8139 | (_("%B(%A+0x%lx): %s reloc against `%s': error %d"), |
| 8140 | input_bfd, input_section, |
| 8141 | (long) rel->r_offset, howto->name, sym_name, (int) r); |
| 8142 | ret = FALSE; |
| 8143 | } |
| 8144 | } |
| 8145 | } |
| 8146 | |
| 8147 | #ifdef DEBUG |
| 8148 | fprintf (stderr, "\n"); |
| 8149 | #endif |
| 8150 | |
| 8151 | return ret; |
| 8152 | } |
| 8153 | \f |
| 8154 | /* Finish up dynamic symbol handling. We set the contents of various |
| 8155 | dynamic sections here. */ |
| 8156 | |
| 8157 | static bfd_boolean |
| 8158 | ppc_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 8159 | struct bfd_link_info *info, |
| 8160 | struct elf_link_hash_entry *h, |
| 8161 | Elf_Internal_Sym *sym) |
| 8162 | { |
| 8163 | struct ppc_elf_link_hash_table *htab; |
| 8164 | struct plt_entry *ent; |
| 8165 | bfd_boolean doneone; |
| 8166 | |
| 8167 | #ifdef DEBUG |
| 8168 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| 8169 | h->root.root.string); |
| 8170 | #endif |
| 8171 | |
| 8172 | htab = ppc_elf_hash_table (info); |
| 8173 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 8174 | |
| 8175 | doneone = FALSE; |
| 8176 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 8177 | if (ent->plt.offset != (bfd_vma) -1) |
| 8178 | { |
| 8179 | if (!doneone) |
| 8180 | { |
| 8181 | Elf_Internal_Rela rela; |
| 8182 | bfd_byte *loc; |
| 8183 | bfd_vma reloc_index; |
| 8184 | |
| 8185 | if (htab->plt_type == PLT_NEW |
| 8186 | || !htab->elf.dynamic_sections_created |
| 8187 | || h->dynindx == -1) |
| 8188 | reloc_index = ent->plt.offset / 4; |
| 8189 | else |
| 8190 | { |
| 8191 | reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) |
| 8192 | / htab->plt_slot_size); |
| 8193 | if (reloc_index > PLT_NUM_SINGLE_ENTRIES |
| 8194 | && htab->plt_type == PLT_OLD) |
| 8195 | reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
| 8196 | } |
| 8197 | |
| 8198 | /* This symbol has an entry in the procedure linkage table. |
| 8199 | Set it up. */ |
| 8200 | if (htab->plt_type == PLT_VXWORKS |
| 8201 | && htab->elf.dynamic_sections_created |
| 8202 | && h->dynindx != -1) |
| 8203 | { |
| 8204 | bfd_vma got_offset; |
| 8205 | const bfd_vma *plt_entry; |
| 8206 | |
| 8207 | /* The first three entries in .got.plt are reserved. */ |
| 8208 | got_offset = (reloc_index + 3) * 4; |
| 8209 | |
| 8210 | /* Use the right PLT. */ |
| 8211 | plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry |
| 8212 | : ppc_elf_vxworks_plt_entry; |
| 8213 | |
| 8214 | /* Fill in the .plt on VxWorks. */ |
| 8215 | if (info->shared) |
| 8216 | { |
| 8217 | bfd_put_32 (output_bfd, |
| 8218 | plt_entry[0] | PPC_HA (got_offset), |
| 8219 | htab->plt->contents + ent->plt.offset + 0); |
| 8220 | bfd_put_32 (output_bfd, |
| 8221 | plt_entry[1] | PPC_LO (got_offset), |
| 8222 | htab->plt->contents + ent->plt.offset + 4); |
| 8223 | } |
| 8224 | else |
| 8225 | { |
| 8226 | bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); |
| 8227 | |
| 8228 | bfd_put_32 (output_bfd, |
| 8229 | plt_entry[0] | PPC_HA (got_loc), |
| 8230 | htab->plt->contents + ent->plt.offset + 0); |
| 8231 | bfd_put_32 (output_bfd, |
| 8232 | plt_entry[1] | PPC_LO (got_loc), |
| 8233 | htab->plt->contents + ent->plt.offset + 4); |
| 8234 | } |
| 8235 | |
| 8236 | bfd_put_32 (output_bfd, plt_entry[2], |
| 8237 | htab->plt->contents + ent->plt.offset + 8); |
| 8238 | bfd_put_32 (output_bfd, plt_entry[3], |
| 8239 | htab->plt->contents + ent->plt.offset + 12); |
| 8240 | |
| 8241 | /* This instruction is an immediate load. The value loaded is |
| 8242 | the byte offset of the R_PPC_JMP_SLOT relocation from the |
| 8243 | start of the .rela.plt section. The value is stored in the |
| 8244 | low-order 16 bits of the load instruction. */ |
| 8245 | /* NOTE: It appears that this is now an index rather than a |
| 8246 | prescaled offset. */ |
| 8247 | bfd_put_32 (output_bfd, |
| 8248 | plt_entry[4] | reloc_index, |
| 8249 | htab->plt->contents + ent->plt.offset + 16); |
| 8250 | /* This instruction is a PC-relative branch whose target is |
| 8251 | the start of the PLT section. The address of this branch |
| 8252 | instruction is 20 bytes beyond the start of this PLT entry. |
| 8253 | The address is encoded in bits 6-29, inclusive. The value |
| 8254 | stored is right-shifted by two bits, permitting a 26-bit |
| 8255 | offset. */ |
| 8256 | bfd_put_32 (output_bfd, |
| 8257 | (plt_entry[5] |
| 8258 | | (-(ent->plt.offset + 20) & 0x03fffffc)), |
| 8259 | htab->plt->contents + ent->plt.offset + 20); |
| 8260 | bfd_put_32 (output_bfd, plt_entry[6], |
| 8261 | htab->plt->contents + ent->plt.offset + 24); |
| 8262 | bfd_put_32 (output_bfd, plt_entry[7], |
| 8263 | htab->plt->contents + ent->plt.offset + 28); |
| 8264 | |
| 8265 | /* Fill in the GOT entry corresponding to this PLT slot with |
| 8266 | the address immediately after the the "bctr" instruction |
| 8267 | in this PLT entry. */ |
| 8268 | bfd_put_32 (output_bfd, (htab->plt->output_section->vma |
| 8269 | + htab->plt->output_offset |
| 8270 | + ent->plt.offset + 16), |
| 8271 | htab->sgotplt->contents + got_offset); |
| 8272 | |
| 8273 | if (!info->shared) |
| 8274 | { |
| 8275 | /* Fill in a couple of entries in .rela.plt.unloaded. */ |
| 8276 | loc = htab->srelplt2->contents |
| 8277 | + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index |
| 8278 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) |
| 8279 | * sizeof (Elf32_External_Rela)); |
| 8280 | |
| 8281 | /* Provide the @ha relocation for the first instruction. */ |
| 8282 | rela.r_offset = (htab->plt->output_section->vma |
| 8283 | + htab->plt->output_offset |
| 8284 | + ent->plt.offset + 2); |
| 8285 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
| 8286 | R_PPC_ADDR16_HA); |
| 8287 | rela.r_addend = got_offset; |
| 8288 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8289 | loc += sizeof (Elf32_External_Rela); |
| 8290 | |
| 8291 | /* Provide the @l relocation for the second instruction. */ |
| 8292 | rela.r_offset = (htab->plt->output_section->vma |
| 8293 | + htab->plt->output_offset |
| 8294 | + ent->plt.offset + 6); |
| 8295 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
| 8296 | R_PPC_ADDR16_LO); |
| 8297 | rela.r_addend = got_offset; |
| 8298 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8299 | loc += sizeof (Elf32_External_Rela); |
| 8300 | |
| 8301 | /* Provide a relocation for the GOT entry corresponding to this |
| 8302 | PLT slot. Point it at the middle of the .plt entry. */ |
| 8303 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 8304 | + htab->sgotplt->output_offset |
| 8305 | + got_offset); |
| 8306 | rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, |
| 8307 | R_PPC_ADDR32); |
| 8308 | rela.r_addend = ent->plt.offset + 16; |
| 8309 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8310 | } |
| 8311 | |
| 8312 | /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. |
| 8313 | In particular, the offset for the relocation is not the |
| 8314 | address of the PLT entry for this function, as specified |
| 8315 | by the ABI. Instead, the offset is set to the address of |
| 8316 | the GOT slot for this function. See EABI 4.4.4.1. */ |
| 8317 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 8318 | + htab->sgotplt->output_offset |
| 8319 | + got_offset); |
| 8320 | |
| 8321 | } |
| 8322 | else |
| 8323 | { |
| 8324 | asection *splt = htab->plt; |
| 8325 | if (!htab->elf.dynamic_sections_created |
| 8326 | || h->dynindx == -1) |
| 8327 | splt = htab->iplt; |
| 8328 | |
| 8329 | rela.r_offset = (splt->output_section->vma |
| 8330 | + splt->output_offset |
| 8331 | + ent->plt.offset); |
| 8332 | if (htab->plt_type == PLT_OLD |
| 8333 | || !htab->elf.dynamic_sections_created |
| 8334 | || h->dynindx == -1) |
| 8335 | { |
| 8336 | /* We don't need to fill in the .plt. The ppc dynamic |
| 8337 | linker will fill it in. */ |
| 8338 | } |
| 8339 | else |
| 8340 | { |
| 8341 | bfd_vma val = (htab->glink_pltresolve + ent->plt.offset |
| 8342 | + htab->glink->output_section->vma |
| 8343 | + htab->glink->output_offset); |
| 8344 | bfd_put_32 (output_bfd, val, |
| 8345 | splt->contents + ent->plt.offset); |
| 8346 | } |
| 8347 | } |
| 8348 | |
| 8349 | /* Fill in the entry in the .rela.plt section. */ |
| 8350 | rela.r_addend = 0; |
| 8351 | if (!htab->elf.dynamic_sections_created |
| 8352 | || h->dynindx == -1) |
| 8353 | { |
| 8354 | BFD_ASSERT (h->type == STT_GNU_IFUNC |
| 8355 | && h->def_regular |
| 8356 | && (h->root.type == bfd_link_hash_defined |
| 8357 | || h->root.type == bfd_link_hash_defweak)); |
| 8358 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 8359 | rela.r_addend = SYM_VAL (h); |
| 8360 | } |
| 8361 | else |
| 8362 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 8363 | |
| 8364 | if (!htab->elf.dynamic_sections_created |
| 8365 | || h->dynindx == -1) |
| 8366 | loc = (htab->reliplt->contents |
| 8367 | + (htab->reliplt->reloc_count++ |
| 8368 | * sizeof (Elf32_External_Rela))); |
| 8369 | else |
| 8370 | loc = (htab->relplt->contents |
| 8371 | + reloc_index * sizeof (Elf32_External_Rela)); |
| 8372 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8373 | |
| 8374 | if (!h->def_regular) |
| 8375 | { |
| 8376 | /* Mark the symbol as undefined, rather than as |
| 8377 | defined in the .plt section. Leave the value if |
| 8378 | there were any relocations where pointer equality |
| 8379 | matters (this is a clue for the dynamic linker, to |
| 8380 | make function pointer comparisons work between an |
| 8381 | application and shared library), otherwise set it |
| 8382 | to zero. */ |
| 8383 | sym->st_shndx = SHN_UNDEF; |
| 8384 | if (!h->pointer_equality_needed) |
| 8385 | sym->st_value = 0; |
| 8386 | else if (!h->ref_regular_nonweak) |
| 8387 | { |
| 8388 | /* This breaks function pointer comparisons, but |
| 8389 | that is better than breaking tests for a NULL |
| 8390 | function pointer. */ |
| 8391 | sym->st_value = 0; |
| 8392 | } |
| 8393 | } |
| 8394 | else if (h->type == STT_GNU_IFUNC |
| 8395 | && !info->shared) |
| 8396 | { |
| 8397 | /* Set the value of ifunc symbols in a non-pie |
| 8398 | executable to the glink entry. This is to avoid |
| 8399 | text relocations. We can't do this for ifunc in |
| 8400 | allocate_dynrelocs, as we do for normal dynamic |
| 8401 | function symbols with plt entries, because we need |
| 8402 | to keep the original value around for the ifunc |
| 8403 | relocation. */ |
| 8404 | sym->st_shndx = (_bfd_elf_section_from_bfd_section |
| 8405 | (output_bfd, htab->glink->output_section)); |
| 8406 | sym->st_value = (ent->glink_offset |
| 8407 | + htab->glink->output_offset |
| 8408 | + htab->glink->output_section->vma); |
| 8409 | } |
| 8410 | doneone = TRUE; |
| 8411 | } |
| 8412 | |
| 8413 | if (htab->plt_type == PLT_NEW |
| 8414 | || !htab->elf.dynamic_sections_created |
| 8415 | || h->dynindx == -1) |
| 8416 | { |
| 8417 | unsigned char *p; |
| 8418 | asection *splt = htab->plt; |
| 8419 | if (!htab->elf.dynamic_sections_created |
| 8420 | || h->dynindx == -1) |
| 8421 | splt = htab->iplt; |
| 8422 | |
| 8423 | p = (unsigned char *) htab->glink->contents + ent->glink_offset; |
| 8424 | |
| 8425 | if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt) |
| 8426 | { |
| 8427 | bfd_put_32 (output_bfd, LWZ_11_3, p); |
| 8428 | p += 4; |
| 8429 | bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); |
| 8430 | p += 4; |
| 8431 | bfd_put_32 (output_bfd, MR_0_3, p); |
| 8432 | p += 4; |
| 8433 | bfd_put_32 (output_bfd, CMPWI_11_0, p); |
| 8434 | p += 4; |
| 8435 | bfd_put_32 (output_bfd, ADD_3_12_2, p); |
| 8436 | p += 4; |
| 8437 | bfd_put_32 (output_bfd, BEQLR, p); |
| 8438 | p += 4; |
| 8439 | bfd_put_32 (output_bfd, MR_3_0, p); |
| 8440 | p += 4; |
| 8441 | bfd_put_32 (output_bfd, NOP, p); |
| 8442 | p += 4; |
| 8443 | } |
| 8444 | |
| 8445 | write_glink_stub (ent, splt, p, info); |
| 8446 | |
| 8447 | if (!info->shared) |
| 8448 | /* We only need one non-PIC glink stub. */ |
| 8449 | break; |
| 8450 | } |
| 8451 | else |
| 8452 | break; |
| 8453 | } |
| 8454 | |
| 8455 | if (h->needs_copy) |
| 8456 | { |
| 8457 | asection *s; |
| 8458 | Elf_Internal_Rela rela; |
| 8459 | bfd_byte *loc; |
| 8460 | |
| 8461 | /* This symbols needs a copy reloc. Set it up. */ |
| 8462 | |
| 8463 | #ifdef DEBUG |
| 8464 | fprintf (stderr, ", copy"); |
| 8465 | #endif |
| 8466 | |
| 8467 | BFD_ASSERT (h->dynindx != -1); |
| 8468 | |
| 8469 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 8470 | s = htab->relsbss; |
| 8471 | else |
| 8472 | s = htab->relbss; |
| 8473 | BFD_ASSERT (s != NULL); |
| 8474 | |
| 8475 | rela.r_offset = SYM_VAL (h); |
| 8476 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 8477 | rela.r_addend = 0; |
| 8478 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 8479 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8480 | } |
| 8481 | |
| 8482 | #ifdef DEBUG |
| 8483 | fprintf (stderr, "\n"); |
| 8484 | #endif |
| 8485 | |
| 8486 | /* Mark some specially defined symbols as absolute. */ |
| 8487 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 8488 | || (!htab->is_vxworks |
| 8489 | && (h == htab->elf.hgot |
| 8490 | || strcmp (h->root.root.string, |
| 8491 | "_PROCEDURE_LINKAGE_TABLE_") == 0))) |
| 8492 | sym->st_shndx = SHN_ABS; |
| 8493 | |
| 8494 | return TRUE; |
| 8495 | } |
| 8496 | \f |
| 8497 | static enum elf_reloc_type_class |
| 8498 | ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) |
| 8499 | { |
| 8500 | switch (ELF32_R_TYPE (rela->r_info)) |
| 8501 | { |
| 8502 | case R_PPC_RELATIVE: |
| 8503 | return reloc_class_relative; |
| 8504 | case R_PPC_REL24: |
| 8505 | case R_PPC_ADDR24: |
| 8506 | case R_PPC_JMP_SLOT: |
| 8507 | return reloc_class_plt; |
| 8508 | case R_PPC_COPY: |
| 8509 | return reloc_class_copy; |
| 8510 | default: |
| 8511 | return reloc_class_normal; |
| 8512 | } |
| 8513 | } |
| 8514 | \f |
| 8515 | /* Finish up the dynamic sections. */ |
| 8516 | |
| 8517 | static bfd_boolean |
| 8518 | ppc_elf_finish_dynamic_sections (bfd *output_bfd, |
| 8519 | struct bfd_link_info *info) |
| 8520 | { |
| 8521 | asection *sdyn; |
| 8522 | asection *splt; |
| 8523 | struct ppc_elf_link_hash_table *htab; |
| 8524 | bfd_vma got; |
| 8525 | bfd *dynobj; |
| 8526 | bfd_boolean ret = TRUE; |
| 8527 | |
| 8528 | #ifdef DEBUG |
| 8529 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 8530 | #endif |
| 8531 | |
| 8532 | htab = ppc_elf_hash_table (info); |
| 8533 | dynobj = elf_hash_table (info)->dynobj; |
| 8534 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 8535 | if (htab->is_vxworks) |
| 8536 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 8537 | else |
| 8538 | splt = NULL; |
| 8539 | |
| 8540 | got = 0; |
| 8541 | if (htab->elf.hgot != NULL) |
| 8542 | got = SYM_VAL (htab->elf.hgot); |
| 8543 | |
| 8544 | if (htab->elf.dynamic_sections_created) |
| 8545 | { |
| 8546 | Elf32_External_Dyn *dyncon, *dynconend; |
| 8547 | |
| 8548 | BFD_ASSERT (htab->plt != NULL && sdyn != NULL); |
| 8549 | |
| 8550 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 8551 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 8552 | for (; dyncon < dynconend; dyncon++) |
| 8553 | { |
| 8554 | Elf_Internal_Dyn dyn; |
| 8555 | asection *s; |
| 8556 | |
| 8557 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 8558 | |
| 8559 | switch (dyn.d_tag) |
| 8560 | { |
| 8561 | case DT_PLTGOT: |
| 8562 | if (htab->is_vxworks) |
| 8563 | s = htab->sgotplt; |
| 8564 | else |
| 8565 | s = htab->plt; |
| 8566 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 8567 | break; |
| 8568 | |
| 8569 | case DT_PLTRELSZ: |
| 8570 | dyn.d_un.d_val = htab->relplt->size; |
| 8571 | break; |
| 8572 | |
| 8573 | case DT_JMPREL: |
| 8574 | s = htab->relplt; |
| 8575 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 8576 | break; |
| 8577 | |
| 8578 | case DT_PPC_GOT: |
| 8579 | dyn.d_un.d_ptr = got; |
| 8580 | break; |
| 8581 | |
| 8582 | case DT_RELASZ: |
| 8583 | if (htab->is_vxworks) |
| 8584 | { |
| 8585 | if (htab->relplt) |
| 8586 | dyn.d_un.d_ptr -= htab->relplt->size; |
| 8587 | break; |
| 8588 | } |
| 8589 | continue; |
| 8590 | |
| 8591 | default: |
| 8592 | if (htab->is_vxworks |
| 8593 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
| 8594 | break; |
| 8595 | continue; |
| 8596 | } |
| 8597 | |
| 8598 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 8599 | } |
| 8600 | } |
| 8601 | |
| 8602 | if (htab->got != NULL) |
| 8603 | { |
| 8604 | if (htab->elf.hgot->root.u.def.section == htab->got |
| 8605 | || htab->elf.hgot->root.u.def.section == htab->sgotplt) |
| 8606 | { |
| 8607 | unsigned char *p = htab->elf.hgot->root.u.def.section->contents; |
| 8608 | |
| 8609 | p += htab->elf.hgot->root.u.def.value; |
| 8610 | if (htab->plt_type == PLT_OLD) |
| 8611 | { |
| 8612 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 |
| 8613 | so that a function can easily find the address of |
| 8614 | _GLOBAL_OFFSET_TABLE_. */ |
| 8615 | BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 |
| 8616 | < htab->elf.hgot->root.u.def.section->size); |
| 8617 | bfd_put_32 (output_bfd, 0x4e800021, p - 4); |
| 8618 | } |
| 8619 | |
| 8620 | if (sdyn != NULL) |
| 8621 | { |
| 8622 | bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; |
| 8623 | BFD_ASSERT (htab->elf.hgot->root.u.def.value |
| 8624 | < htab->elf.hgot->root.u.def.section->size); |
| 8625 | bfd_put_32 (output_bfd, val, p); |
| 8626 | } |
| 8627 | } |
| 8628 | else |
| 8629 | { |
| 8630 | (*_bfd_error_handler) (_("%s not defined in linker created %s"), |
| 8631 | htab->elf.hgot->root.root.string, |
| 8632 | (htab->sgotplt != NULL |
| 8633 | ? htab->sgotplt->name : htab->got->name)); |
| 8634 | bfd_set_error (bfd_error_bad_value); |
| 8635 | ret = FALSE; |
| 8636 | } |
| 8637 | |
| 8638 | elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; |
| 8639 | } |
| 8640 | |
| 8641 | /* Fill in the first entry in the VxWorks procedure linkage table. */ |
| 8642 | if (splt && splt->size > 0) |
| 8643 | { |
| 8644 | /* Use the right PLT. */ |
| 8645 | const bfd_vma *plt_entry = (info->shared |
| 8646 | ? ppc_elf_vxworks_pic_plt0_entry |
| 8647 | : ppc_elf_vxworks_plt0_entry); |
| 8648 | |
| 8649 | if (!info->shared) |
| 8650 | { |
| 8651 | bfd_vma got_value = SYM_VAL (htab->elf.hgot); |
| 8652 | |
| 8653 | bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), |
| 8654 | splt->contents + 0); |
| 8655 | bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), |
| 8656 | splt->contents + 4); |
| 8657 | } |
| 8658 | else |
| 8659 | { |
| 8660 | bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); |
| 8661 | bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); |
| 8662 | } |
| 8663 | bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); |
| 8664 | bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); |
| 8665 | bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); |
| 8666 | bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); |
| 8667 | bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); |
| 8668 | bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); |
| 8669 | |
| 8670 | if (! info->shared) |
| 8671 | { |
| 8672 | Elf_Internal_Rela rela; |
| 8673 | bfd_byte *loc; |
| 8674 | |
| 8675 | loc = htab->srelplt2->contents; |
| 8676 | |
| 8677 | /* Output the @ha relocation for the first instruction. */ |
| 8678 | rela.r_offset = (htab->plt->output_section->vma |
| 8679 | + htab->plt->output_offset |
| 8680 | + 2); |
| 8681 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
| 8682 | rela.r_addend = 0; |
| 8683 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8684 | loc += sizeof (Elf32_External_Rela); |
| 8685 | |
| 8686 | /* Output the @l relocation for the second instruction. */ |
| 8687 | rela.r_offset = (htab->plt->output_section->vma |
| 8688 | + htab->plt->output_offset |
| 8689 | + 6); |
| 8690 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
| 8691 | rela.r_addend = 0; |
| 8692 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 8693 | loc += sizeof (Elf32_External_Rela); |
| 8694 | |
| 8695 | /* Fix up the remaining relocations. They may have the wrong |
| 8696 | symbol index for _G_O_T_ or _P_L_T_ depending on the order |
| 8697 | in which symbols were output. */ |
| 8698 | while (loc < htab->srelplt2->contents + htab->srelplt2->size) |
| 8699 | { |
| 8700 | Elf_Internal_Rela rel; |
| 8701 | |
| 8702 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 8703 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
| 8704 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 8705 | loc += sizeof (Elf32_External_Rela); |
| 8706 | |
| 8707 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 8708 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
| 8709 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 8710 | loc += sizeof (Elf32_External_Rela); |
| 8711 | |
| 8712 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 8713 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); |
| 8714 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 8715 | loc += sizeof (Elf32_External_Rela); |
| 8716 | } |
| 8717 | } |
| 8718 | } |
| 8719 | |
| 8720 | if (htab->glink != NULL |
| 8721 | && htab->glink->contents != NULL |
| 8722 | && htab->elf.dynamic_sections_created) |
| 8723 | { |
| 8724 | unsigned char *p; |
| 8725 | unsigned char *endp; |
| 8726 | bfd_vma res0; |
| 8727 | unsigned int i; |
| 8728 | |
| 8729 | /* |
| 8730 | * PIC glink code is the following: |
| 8731 | * |
| 8732 | * # ith PLT code stub. |
| 8733 | * addis 11,30,(plt+(i-1)*4-got)@ha |
| 8734 | * lwz 11,(plt+(i-1)*4-got)@l(11) |
| 8735 | * mtctr 11 |
| 8736 | * bctr |
| 8737 | * |
| 8738 | * # A table of branches, one for each plt entry. |
| 8739 | * # The idea is that the plt call stub loads ctr and r11 with these |
| 8740 | * # addresses, so (r11 - res_0) gives the plt index * 4. |
| 8741 | * res_0: b PLTresolve |
| 8742 | * res_1: b PLTresolve |
| 8743 | * . |
| 8744 | * # Some number of entries towards the end can be nops |
| 8745 | * res_n_m3: nop |
| 8746 | * res_n_m2: nop |
| 8747 | * res_n_m1: |
| 8748 | * |
| 8749 | * PLTresolve: |
| 8750 | * addis 11,11,(1f-res_0)@ha |
| 8751 | * mflr 0 |
| 8752 | * bcl 20,31,1f |
| 8753 | * 1: addi 11,11,(1b-res_0)@l |
| 8754 | * mflr 12 |
| 8755 | * mtlr 0 |
| 8756 | * sub 11,11,12 # r11 = index * 4 |
| 8757 | * addis 12,12,(got+4-1b)@ha |
| 8758 | * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve |
| 8759 | * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address |
| 8760 | * mtctr 0 |
| 8761 | * add 0,11,11 |
| 8762 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
| 8763 | * bctr |
| 8764 | */ |
| 8765 | static const unsigned int pic_plt_resolve[] = |
| 8766 | { |
| 8767 | ADDIS_11_11, |
| 8768 | MFLR_0, |
| 8769 | BCL_20_31, |
| 8770 | ADDI_11_11, |
| 8771 | MFLR_12, |
| 8772 | MTLR_0, |
| 8773 | SUB_11_11_12, |
| 8774 | ADDIS_12_12, |
| 8775 | LWZ_0_12, |
| 8776 | LWZ_12_12, |
| 8777 | MTCTR_0, |
| 8778 | ADD_0_11_11, |
| 8779 | ADD_11_0_11, |
| 8780 | BCTR, |
| 8781 | NOP, |
| 8782 | NOP |
| 8783 | }; |
| 8784 | |
| 8785 | /* |
| 8786 | * Non-PIC glink code is a little simpler. |
| 8787 | * |
| 8788 | * # ith PLT code stub. |
| 8789 | * lis 11,(plt+(i-1)*4)@ha |
| 8790 | * lwz 11,(plt+(i-1)*4)@l(11) |
| 8791 | * mtctr 11 |
| 8792 | * bctr |
| 8793 | * |
| 8794 | * The branch table is the same, then comes |
| 8795 | * |
| 8796 | * PLTresolve: |
| 8797 | * lis 12,(got+4)@ha |
| 8798 | * addis 11,11,(-res_0)@ha |
| 8799 | * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve |
| 8800 | * addi 11,11,(-res_0)@l # r11 = index * 4 |
| 8801 | * mtctr 0 |
| 8802 | * add 0,11,11 |
| 8803 | * lwz 12,(got+8)@l(12) # got[2] contains the map address |
| 8804 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
| 8805 | * bctr |
| 8806 | */ |
| 8807 | static const unsigned int plt_resolve[] = |
| 8808 | { |
| 8809 | LIS_12, |
| 8810 | ADDIS_11_11, |
| 8811 | LWZ_0_12, |
| 8812 | ADDI_11_11, |
| 8813 | MTCTR_0, |
| 8814 | ADD_0_11_11, |
| 8815 | LWZ_12_12, |
| 8816 | ADD_11_0_11, |
| 8817 | BCTR, |
| 8818 | NOP, |
| 8819 | NOP, |
| 8820 | NOP, |
| 8821 | NOP, |
| 8822 | NOP, |
| 8823 | NOP, |
| 8824 | NOP |
| 8825 | }; |
| 8826 | |
| 8827 | if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) |
| 8828 | abort (); |
| 8829 | if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) |
| 8830 | abort (); |
| 8831 | |
| 8832 | /* Build the branch table, one for each plt entry (less one), |
| 8833 | and perhaps some padding. */ |
| 8834 | p = htab->glink->contents; |
| 8835 | p += htab->glink_pltresolve; |
| 8836 | endp = htab->glink->contents; |
| 8837 | endp += htab->glink->size - GLINK_PLTRESOLVE; |
| 8838 | while (p < endp - 8 * 4) |
| 8839 | { |
| 8840 | bfd_put_32 (output_bfd, B + endp - p, p); |
| 8841 | p += 4; |
| 8842 | } |
| 8843 | while (p < endp) |
| 8844 | { |
| 8845 | bfd_put_32 (output_bfd, NOP, p); |
| 8846 | p += 4; |
| 8847 | } |
| 8848 | |
| 8849 | res0 = (htab->glink_pltresolve |
| 8850 | + htab->glink->output_section->vma |
| 8851 | + htab->glink->output_offset); |
| 8852 | |
| 8853 | /* Last comes the PLTresolve stub. */ |
| 8854 | if (info->shared) |
| 8855 | { |
| 8856 | bfd_vma bcl; |
| 8857 | |
| 8858 | for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) |
| 8859 | { |
| 8860 | bfd_put_32 (output_bfd, pic_plt_resolve[i], p); |
| 8861 | p += 4; |
| 8862 | } |
| 8863 | p -= 4 * ARRAY_SIZE (pic_plt_resolve); |
| 8864 | |
| 8865 | bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 |
| 8866 | + htab->glink->output_section->vma |
| 8867 | + htab->glink->output_offset); |
| 8868 | |
| 8869 | bfd_put_32 (output_bfd, |
| 8870 | ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); |
| 8871 | bfd_put_32 (output_bfd, |
| 8872 | ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); |
| 8873 | bfd_put_32 (output_bfd, |
| 8874 | ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); |
| 8875 | if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) |
| 8876 | { |
| 8877 | bfd_put_32 (output_bfd, |
| 8878 | LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); |
| 8879 | bfd_put_32 (output_bfd, |
| 8880 | LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); |
| 8881 | } |
| 8882 | else |
| 8883 | { |
| 8884 | bfd_put_32 (output_bfd, |
| 8885 | LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); |
| 8886 | bfd_put_32 (output_bfd, |
| 8887 | LWZ_12_12 + 4, p + 9*4); |
| 8888 | } |
| 8889 | } |
| 8890 | else |
| 8891 | { |
| 8892 | for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) |
| 8893 | { |
| 8894 | bfd_put_32 (output_bfd, plt_resolve[i], p); |
| 8895 | p += 4; |
| 8896 | } |
| 8897 | p -= 4 * ARRAY_SIZE (plt_resolve); |
| 8898 | |
| 8899 | bfd_put_32 (output_bfd, |
| 8900 | LIS_12 + PPC_HA (got + 4), p + 0*4); |
| 8901 | bfd_put_32 (output_bfd, |
| 8902 | ADDIS_11_11 + PPC_HA (-res0), p + 1*4); |
| 8903 | bfd_put_32 (output_bfd, |
| 8904 | ADDI_11_11 + PPC_LO (-res0), p + 3*4); |
| 8905 | if (PPC_HA (got + 4) == PPC_HA (got + 8)) |
| 8906 | { |
| 8907 | bfd_put_32 (output_bfd, |
| 8908 | LWZ_0_12 + PPC_LO (got + 4), p + 2*4); |
| 8909 | bfd_put_32 (output_bfd, |
| 8910 | LWZ_12_12 + PPC_LO (got + 8), p + 6*4); |
| 8911 | } |
| 8912 | else |
| 8913 | { |
| 8914 | bfd_put_32 (output_bfd, |
| 8915 | LWZU_0_12 + PPC_LO (got + 4), p + 2*4); |
| 8916 | bfd_put_32 (output_bfd, |
| 8917 | LWZ_12_12 + 4, p + 6*4); |
| 8918 | } |
| 8919 | } |
| 8920 | } |
| 8921 | |
| 8922 | return ret; |
| 8923 | } |
| 8924 | \f |
| 8925 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 8926 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 8927 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 8928 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 8929 | #define ELF_ARCH bfd_arch_powerpc |
| 8930 | #define ELF_MACHINE_CODE EM_PPC |
| 8931 | #ifdef __QNXTARGET__ |
| 8932 | #define ELF_MAXPAGESIZE 0x1000 |
| 8933 | #else |
| 8934 | #define ELF_MAXPAGESIZE 0x10000 |
| 8935 | #endif |
| 8936 | #define ELF_MINPAGESIZE 0x1000 |
| 8937 | #define ELF_COMMONPAGESIZE 0x1000 |
| 8938 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 8939 | |
| 8940 | #ifdef EM_CYGNUS_POWERPC |
| 8941 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 8942 | #endif |
| 8943 | |
| 8944 | #ifdef EM_PPC_OLD |
| 8945 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 8946 | #endif |
| 8947 | |
| 8948 | #define elf_backend_plt_not_loaded 1 |
| 8949 | #define elf_backend_can_gc_sections 1 |
| 8950 | #define elf_backend_can_refcount 1 |
| 8951 | #define elf_backend_rela_normal 1 |
| 8952 | |
| 8953 | #define bfd_elf32_mkobject ppc_elf_mkobject |
| 8954 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 8955 | #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
| 8956 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 8957 | #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup |
| 8958 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 8959 | #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create |
| 8960 | #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab |
| 8961 | |
| 8962 | #define elf_backend_object_p ppc_elf_object_p |
| 8963 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| 8964 | #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| 8965 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 8966 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 8967 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| 8968 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 8969 | #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol |
| 8970 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 8971 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 8972 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 8973 | #define elf_backend_hash_symbol ppc_elf_hash_symbol |
| 8974 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 8975 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 8976 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 8977 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 8978 | #define elf_backend_grok_prstatus ppc_elf_grok_prstatus |
| 8979 | #define elf_backend_grok_psinfo ppc_elf_grok_psinfo |
| 8980 | #define elf_backend_write_core_note ppc_elf_write_core_note |
| 8981 | #define elf_backend_reloc_type_class ppc_elf_reloc_type_class |
| 8982 | #define elf_backend_begin_write_processing ppc_elf_begin_write_processing |
| 8983 | #define elf_backend_final_write_processing ppc_elf_final_write_processing |
| 8984 | #define elf_backend_write_section ppc_elf_write_section |
| 8985 | #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr |
| 8986 | #define elf_backend_plt_sym_val ppc_elf_plt_sym_val |
| 8987 | #define elf_backend_action_discarded ppc_elf_action_discarded |
| 8988 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 8989 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
| 8990 | |
| 8991 | #include "elf32-target.h" |
| 8992 | |
| 8993 | /* VxWorks Target */ |
| 8994 | |
| 8995 | #undef TARGET_LITTLE_SYM |
| 8996 | #undef TARGET_LITTLE_NAME |
| 8997 | |
| 8998 | #undef TARGET_BIG_SYM |
| 8999 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec |
| 9000 | #undef TARGET_BIG_NAME |
| 9001 | #define TARGET_BIG_NAME "elf32-powerpc-vxworks" |
| 9002 | |
| 9003 | /* VxWorks uses the elf default section flags for .plt. */ |
| 9004 | static const struct bfd_elf_special_section * |
| 9005 | ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 9006 | { |
| 9007 | if (sec->name == NULL) |
| 9008 | return NULL; |
| 9009 | |
| 9010 | if (strcmp (sec->name, ".plt") == 0) |
| 9011 | return _bfd_elf_get_sec_type_attr (abfd, sec); |
| 9012 | |
| 9013 | return ppc_elf_get_sec_type_attr (abfd, sec); |
| 9014 | } |
| 9015 | |
| 9016 | /* Like ppc_elf_link_hash_table_create, but overrides |
| 9017 | appropriately for VxWorks. */ |
| 9018 | static struct bfd_link_hash_table * |
| 9019 | ppc_elf_vxworks_link_hash_table_create (bfd *abfd) |
| 9020 | { |
| 9021 | struct bfd_link_hash_table *ret; |
| 9022 | |
| 9023 | ret = ppc_elf_link_hash_table_create (abfd); |
| 9024 | if (ret) |
| 9025 | { |
| 9026 | struct ppc_elf_link_hash_table *htab |
| 9027 | = (struct ppc_elf_link_hash_table *)ret; |
| 9028 | htab->is_vxworks = 1; |
| 9029 | htab->plt_type = PLT_VXWORKS; |
| 9030 | htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; |
| 9031 | htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; |
| 9032 | htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; |
| 9033 | } |
| 9034 | return ret; |
| 9035 | } |
| 9036 | |
| 9037 | /* Tweak magic VxWorks symbols as they are loaded. */ |
| 9038 | static bfd_boolean |
| 9039 | ppc_elf_vxworks_add_symbol_hook (bfd *abfd, |
| 9040 | struct bfd_link_info *info, |
| 9041 | Elf_Internal_Sym *sym, |
| 9042 | const char **namep ATTRIBUTE_UNUSED, |
| 9043 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 9044 | asection **secp, |
| 9045 | bfd_vma *valp) |
| 9046 | { |
| 9047 | if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, |
| 9048 | valp)) |
| 9049 | return FALSE; |
| 9050 | |
| 9051 | return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); |
| 9052 | } |
| 9053 | |
| 9054 | static void |
| 9055 | ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) |
| 9056 | { |
| 9057 | ppc_elf_final_write_processing(abfd, linker); |
| 9058 | elf_vxworks_final_write_processing(abfd, linker); |
| 9059 | } |
| 9060 | |
| 9061 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so |
| 9062 | define it. */ |
| 9063 | #undef elf_backend_want_plt_sym |
| 9064 | #define elf_backend_want_plt_sym 1 |
| 9065 | #undef elf_backend_want_got_plt |
| 9066 | #define elf_backend_want_got_plt 1 |
| 9067 | #undef elf_backend_got_symbol_offset |
| 9068 | #define elf_backend_got_symbol_offset 0 |
| 9069 | #undef elf_backend_plt_not_loaded |
| 9070 | #define elf_backend_plt_not_loaded 0 |
| 9071 | #undef elf_backend_plt_readonly |
| 9072 | #define elf_backend_plt_readonly 1 |
| 9073 | #undef elf_backend_got_header_size |
| 9074 | #define elf_backend_got_header_size 12 |
| 9075 | |
| 9076 | #undef bfd_elf32_get_synthetic_symtab |
| 9077 | |
| 9078 | #undef bfd_elf32_bfd_link_hash_table_create |
| 9079 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 9080 | ppc_elf_vxworks_link_hash_table_create |
| 9081 | #undef elf_backend_add_symbol_hook |
| 9082 | #define elf_backend_add_symbol_hook \ |
| 9083 | ppc_elf_vxworks_add_symbol_hook |
| 9084 | #undef elf_backend_link_output_symbol_hook |
| 9085 | #define elf_backend_link_output_symbol_hook \ |
| 9086 | elf_vxworks_link_output_symbol_hook |
| 9087 | #undef elf_backend_final_write_processing |
| 9088 | #define elf_backend_final_write_processing \ |
| 9089 | ppc_elf_vxworks_final_write_processing |
| 9090 | #undef elf_backend_get_sec_type_attr |
| 9091 | #define elf_backend_get_sec_type_attr \ |
| 9092 | ppc_elf_vxworks_get_sec_type_attr |
| 9093 | #undef elf_backend_emit_relocs |
| 9094 | #define elf_backend_emit_relocs \ |
| 9095 | elf_vxworks_emit_relocs |
| 9096 | |
| 9097 | #undef elf32_bed |
| 9098 | #define elf32_bed ppc_elf_vxworks_bed |
| 9099 | #undef elf_backend_post_process_headers |
| 9100 | |
| 9101 | #include "elf32-target.h" |