| 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, 2011, 2012 |
| 4 | Free Software Foundation, Inc. |
| 5 | Written by Ian Lance Taylor, Cygnus Support. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the |
| 21 | Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 22 | Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | |
| 25 | /* This file is based on a preliminary PowerPC ELF ABI. The |
| 26 | information may not match the final PowerPC ELF ABI. It includes |
| 27 | suggestions from the in-progress Embedded PowerPC ABI, and that |
| 28 | information may also not match. */ |
| 29 | |
| 30 | #include "sysdep.h" |
| 31 | #include <stdarg.h> |
| 32 | #include "bfd.h" |
| 33 | #include "bfdlink.h" |
| 34 | #include "libbfd.h" |
| 35 | #include "elf-bfd.h" |
| 36 | #include "elf/ppc.h" |
| 37 | #include "elf32-ppc.h" |
| 38 | #include "elf-vxworks.h" |
| 39 | #include "dwarf2.h" |
| 40 | #include "elf-linux-psinfo.h" |
| 41 | |
| 42 | typedef enum split16_format_type |
| 43 | { |
| 44 | split16a_type = 0, |
| 45 | split16d_type |
| 46 | } |
| 47 | split16_format_type; |
| 48 | |
| 49 | /* RELA relocations are used here. */ |
| 50 | |
| 51 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 52 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 53 | static bfd_reloc_status_type ppc_elf_unhandled_reloc |
| 54 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 55 | static void ppc_elf_vle_split16 |
| 56 | (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type); |
| 57 | |
| 58 | /* Branch prediction bit for branch taken relocs. */ |
| 59 | #define BRANCH_PREDICT_BIT 0x200000 |
| 60 | /* Mask to set RA in memory instructions. */ |
| 61 | #define RA_REGISTER_MASK 0x001f0000 |
| 62 | /* Value to shift register by to insert RA. */ |
| 63 | #define RA_REGISTER_SHIFT 16 |
| 64 | |
| 65 | /* The name of the dynamic interpreter. This is put in the .interp |
| 66 | section. */ |
| 67 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 68 | |
| 69 | /* For old-style PLT. */ |
| 70 | /* The number of single-slot PLT entries (the rest use two slots). */ |
| 71 | #define PLT_NUM_SINGLE_ENTRIES 8192 |
| 72 | |
| 73 | /* For new-style .glink and .plt. */ |
| 74 | #define GLINK_PLTRESOLVE 16*4 |
| 75 | #define GLINK_ENTRY_SIZE 4*4 |
| 76 | #define TLS_GET_ADDR_GLINK_SIZE 12*4 |
| 77 | |
| 78 | /* VxWorks uses its own plt layout, filled in by the static linker. */ |
| 79 | |
| 80 | /* The standard VxWorks PLT entry. */ |
| 81 | #define VXWORKS_PLT_ENTRY_SIZE 32 |
| 82 | static const bfd_vma ppc_elf_vxworks_plt_entry |
| 83 | [VXWORKS_PLT_ENTRY_SIZE / 4] = |
| 84 | { |
| 85 | 0x3d800000, /* lis r12,0 */ |
| 86 | 0x818c0000, /* lwz r12,0(r12) */ |
| 87 | 0x7d8903a6, /* mtctr r12 */ |
| 88 | 0x4e800420, /* bctr */ |
| 89 | 0x39600000, /* li r11,0 */ |
| 90 | 0x48000000, /* b 14 <.PLT0resolve+0x4> */ |
| 91 | 0x60000000, /* nop */ |
| 92 | 0x60000000, /* nop */ |
| 93 | }; |
| 94 | static const bfd_vma ppc_elf_vxworks_pic_plt_entry |
| 95 | [VXWORKS_PLT_ENTRY_SIZE / 4] = |
| 96 | { |
| 97 | 0x3d9e0000, /* addis r12,r30,0 */ |
| 98 | 0x818c0000, /* lwz r12,0(r12) */ |
| 99 | 0x7d8903a6, /* mtctr r12 */ |
| 100 | 0x4e800420, /* bctr */ |
| 101 | 0x39600000, /* li r11,0 */ |
| 102 | 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ |
| 103 | 0x60000000, /* nop */ |
| 104 | 0x60000000, /* nop */ |
| 105 | }; |
| 106 | |
| 107 | /* The initial VxWorks PLT entry. */ |
| 108 | #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 |
| 109 | static const bfd_vma ppc_elf_vxworks_plt0_entry |
| 110 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = |
| 111 | { |
| 112 | 0x3d800000, /* lis r12,0 */ |
| 113 | 0x398c0000, /* addi r12,r12,0 */ |
| 114 | 0x800c0008, /* lwz r0,8(r12) */ |
| 115 | 0x7c0903a6, /* mtctr r0 */ |
| 116 | 0x818c0004, /* lwz r12,4(r12) */ |
| 117 | 0x4e800420, /* bctr */ |
| 118 | 0x60000000, /* nop */ |
| 119 | 0x60000000, /* nop */ |
| 120 | }; |
| 121 | static const bfd_vma ppc_elf_vxworks_pic_plt0_entry |
| 122 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = |
| 123 | { |
| 124 | 0x819e0008, /* lwz r12,8(r30) */ |
| 125 | 0x7d8903a6, /* mtctr r12 */ |
| 126 | 0x819e0004, /* lwz r12,4(r30) */ |
| 127 | 0x4e800420, /* bctr */ |
| 128 | 0x60000000, /* nop */ |
| 129 | 0x60000000, /* nop */ |
| 130 | 0x60000000, /* nop */ |
| 131 | 0x60000000, /* nop */ |
| 132 | }; |
| 133 | |
| 134 | /* For executables, we have some additional relocations in |
| 135 | .rela.plt.unloaded, for the kernel loader. */ |
| 136 | |
| 137 | /* The number of non-JMP_SLOT relocations per PLT0 slot. */ |
| 138 | #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 |
| 139 | /* The number of relocations in the PLTResolve slot. */ |
| 140 | #define VXWORKS_PLTRESOLVE_RELOCS 2 |
| 141 | /* The number of relocations in the PLTResolve slot when when creating |
| 142 | a shared library. */ |
| 143 | #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 |
| 144 | |
| 145 | /* Some instructions. */ |
| 146 | #define ADDIS_11_11 0x3d6b0000 |
| 147 | #define ADDIS_11_30 0x3d7e0000 |
| 148 | #define ADDIS_12_12 0x3d8c0000 |
| 149 | #define ADDI_11_11 0x396b0000 |
| 150 | #define ADD_0_11_11 0x7c0b5a14 |
| 151 | #define ADD_3_12_2 0x7c6c1214 |
| 152 | #define ADD_11_0_11 0x7d605a14 |
| 153 | #define B 0x48000000 |
| 154 | #define BCL_20_31 0x429f0005 |
| 155 | #define BCTR 0x4e800420 |
| 156 | #define BEQLR 0x4d820020 |
| 157 | #define CMPWI_11_0 0x2c0b0000 |
| 158 | #define LIS_11 0x3d600000 |
| 159 | #define LIS_12 0x3d800000 |
| 160 | #define LWZU_0_12 0x840c0000 |
| 161 | #define LWZ_0_12 0x800c0000 |
| 162 | #define LWZ_11_3 0x81630000 |
| 163 | #define LWZ_11_11 0x816b0000 |
| 164 | #define LWZ_11_30 0x817e0000 |
| 165 | #define LWZ_12_3 0x81830000 |
| 166 | #define LWZ_12_12 0x818c0000 |
| 167 | #define MR_0_3 0x7c601b78 |
| 168 | #define MR_3_0 0x7c030378 |
| 169 | #define MFLR_0 0x7c0802a6 |
| 170 | #define MFLR_12 0x7d8802a6 |
| 171 | #define MTCTR_0 0x7c0903a6 |
| 172 | #define MTCTR_11 0x7d6903a6 |
| 173 | #define MTLR_0 0x7c0803a6 |
| 174 | #define NOP 0x60000000 |
| 175 | #define SUB_11_11_12 0x7d6c5850 |
| 176 | |
| 177 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 178 | #define TP_OFFSET 0x7000 |
| 179 | #define DTP_OFFSET 0x8000 |
| 180 | |
| 181 | /* The value of a defined global symbol. */ |
| 182 | #define SYM_VAL(SYM) \ |
| 183 | ((SYM)->root.u.def.section->output_section->vma \ |
| 184 | + (SYM)->root.u.def.section->output_offset \ |
| 185 | + (SYM)->root.u.def.value) |
| 186 | \f |
| 187 | static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; |
| 188 | |
| 189 | static reloc_howto_type ppc_elf_howto_raw[] = { |
| 190 | /* This reloc does nothing. */ |
| 191 | HOWTO (R_PPC_NONE, /* type */ |
| 192 | 0, /* rightshift */ |
| 193 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 194 | 32, /* bitsize */ |
| 195 | FALSE, /* pc_relative */ |
| 196 | 0, /* bitpos */ |
| 197 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 198 | bfd_elf_generic_reloc, /* special_function */ |
| 199 | "R_PPC_NONE", /* name */ |
| 200 | FALSE, /* partial_inplace */ |
| 201 | 0, /* src_mask */ |
| 202 | 0, /* dst_mask */ |
| 203 | FALSE), /* pcrel_offset */ |
| 204 | |
| 205 | /* A standard 32 bit relocation. */ |
| 206 | HOWTO (R_PPC_ADDR32, /* type */ |
| 207 | 0, /* rightshift */ |
| 208 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 209 | 32, /* bitsize */ |
| 210 | FALSE, /* pc_relative */ |
| 211 | 0, /* bitpos */ |
| 212 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 213 | bfd_elf_generic_reloc, /* special_function */ |
| 214 | "R_PPC_ADDR32", /* name */ |
| 215 | FALSE, /* partial_inplace */ |
| 216 | 0, /* src_mask */ |
| 217 | 0xffffffff, /* dst_mask */ |
| 218 | FALSE), /* pcrel_offset */ |
| 219 | |
| 220 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 221 | FIXME: we don't check that, we just clear them. */ |
| 222 | HOWTO (R_PPC_ADDR24, /* type */ |
| 223 | 0, /* rightshift */ |
| 224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 225 | 26, /* bitsize */ |
| 226 | FALSE, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 229 | bfd_elf_generic_reloc, /* special_function */ |
| 230 | "R_PPC_ADDR24", /* name */ |
| 231 | FALSE, /* partial_inplace */ |
| 232 | 0, /* src_mask */ |
| 233 | 0x3fffffc, /* dst_mask */ |
| 234 | FALSE), /* pcrel_offset */ |
| 235 | |
| 236 | /* A standard 16 bit relocation. */ |
| 237 | HOWTO (R_PPC_ADDR16, /* type */ |
| 238 | 0, /* rightshift */ |
| 239 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 240 | 16, /* bitsize */ |
| 241 | FALSE, /* pc_relative */ |
| 242 | 0, /* bitpos */ |
| 243 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 244 | bfd_elf_generic_reloc, /* special_function */ |
| 245 | "R_PPC_ADDR16", /* name */ |
| 246 | FALSE, /* partial_inplace */ |
| 247 | 0, /* src_mask */ |
| 248 | 0xffff, /* dst_mask */ |
| 249 | FALSE), /* pcrel_offset */ |
| 250 | |
| 251 | /* A 16 bit relocation without overflow. */ |
| 252 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 253 | 0, /* rightshift */ |
| 254 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 255 | 16, /* bitsize */ |
| 256 | FALSE, /* pc_relative */ |
| 257 | 0, /* bitpos */ |
| 258 | complain_overflow_dont,/* complain_on_overflow */ |
| 259 | bfd_elf_generic_reloc, /* special_function */ |
| 260 | "R_PPC_ADDR16_LO", /* name */ |
| 261 | FALSE, /* partial_inplace */ |
| 262 | 0, /* src_mask */ |
| 263 | 0xffff, /* dst_mask */ |
| 264 | FALSE), /* pcrel_offset */ |
| 265 | |
| 266 | /* The high order 16 bits of an address. */ |
| 267 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 268 | 16, /* rightshift */ |
| 269 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 270 | 16, /* bitsize */ |
| 271 | FALSE, /* pc_relative */ |
| 272 | 0, /* bitpos */ |
| 273 | complain_overflow_dont, /* complain_on_overflow */ |
| 274 | bfd_elf_generic_reloc, /* special_function */ |
| 275 | "R_PPC_ADDR16_HI", /* name */ |
| 276 | FALSE, /* partial_inplace */ |
| 277 | 0, /* src_mask */ |
| 278 | 0xffff, /* dst_mask */ |
| 279 | FALSE), /* pcrel_offset */ |
| 280 | |
| 281 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 282 | the low 16 bits, treated as a signed number, is negative. */ |
| 283 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 284 | 16, /* rightshift */ |
| 285 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 286 | 16, /* bitsize */ |
| 287 | FALSE, /* pc_relative */ |
| 288 | 0, /* bitpos */ |
| 289 | complain_overflow_dont, /* complain_on_overflow */ |
| 290 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 291 | "R_PPC_ADDR16_HA", /* name */ |
| 292 | FALSE, /* partial_inplace */ |
| 293 | 0, /* src_mask */ |
| 294 | 0xffff, /* dst_mask */ |
| 295 | FALSE), /* pcrel_offset */ |
| 296 | |
| 297 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 298 | FIXME: we don't check that, we just clear them. */ |
| 299 | HOWTO (R_PPC_ADDR14, /* type */ |
| 300 | 0, /* rightshift */ |
| 301 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 302 | 16, /* bitsize */ |
| 303 | FALSE, /* pc_relative */ |
| 304 | 0, /* bitpos */ |
| 305 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 306 | bfd_elf_generic_reloc, /* special_function */ |
| 307 | "R_PPC_ADDR14", /* name */ |
| 308 | FALSE, /* partial_inplace */ |
| 309 | 0, /* src_mask */ |
| 310 | 0xfffc, /* dst_mask */ |
| 311 | FALSE), /* pcrel_offset */ |
| 312 | |
| 313 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 314 | indicate that the branch is expected to be taken. The lower two |
| 315 | bits must be zero. */ |
| 316 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 317 | 0, /* rightshift */ |
| 318 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 319 | 16, /* bitsize */ |
| 320 | FALSE, /* pc_relative */ |
| 321 | 0, /* bitpos */ |
| 322 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 323 | bfd_elf_generic_reloc, /* special_function */ |
| 324 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 325 | FALSE, /* partial_inplace */ |
| 326 | 0, /* src_mask */ |
| 327 | 0xfffc, /* dst_mask */ |
| 328 | FALSE), /* pcrel_offset */ |
| 329 | |
| 330 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 331 | indicate that the branch is not expected to be taken. The lower |
| 332 | two bits must be zero. */ |
| 333 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 334 | 0, /* rightshift */ |
| 335 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 336 | 16, /* bitsize */ |
| 337 | FALSE, /* pc_relative */ |
| 338 | 0, /* bitpos */ |
| 339 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 340 | bfd_elf_generic_reloc, /* special_function */ |
| 341 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 342 | FALSE, /* partial_inplace */ |
| 343 | 0, /* src_mask */ |
| 344 | 0xfffc, /* dst_mask */ |
| 345 | FALSE), /* pcrel_offset */ |
| 346 | |
| 347 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 348 | HOWTO (R_PPC_REL24, /* type */ |
| 349 | 0, /* rightshift */ |
| 350 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 351 | 26, /* bitsize */ |
| 352 | TRUE, /* pc_relative */ |
| 353 | 0, /* bitpos */ |
| 354 | complain_overflow_signed, /* complain_on_overflow */ |
| 355 | bfd_elf_generic_reloc, /* special_function */ |
| 356 | "R_PPC_REL24", /* name */ |
| 357 | FALSE, /* partial_inplace */ |
| 358 | 0, /* src_mask */ |
| 359 | 0x3fffffc, /* dst_mask */ |
| 360 | TRUE), /* pcrel_offset */ |
| 361 | |
| 362 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 363 | HOWTO (R_PPC_REL14, /* type */ |
| 364 | 0, /* rightshift */ |
| 365 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 366 | 16, /* bitsize */ |
| 367 | TRUE, /* pc_relative */ |
| 368 | 0, /* bitpos */ |
| 369 | complain_overflow_signed, /* complain_on_overflow */ |
| 370 | bfd_elf_generic_reloc, /* special_function */ |
| 371 | "R_PPC_REL14", /* name */ |
| 372 | FALSE, /* partial_inplace */ |
| 373 | 0, /* src_mask */ |
| 374 | 0xfffc, /* dst_mask */ |
| 375 | TRUE), /* pcrel_offset */ |
| 376 | |
| 377 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 378 | the branch is expected to be taken. The lower two bits must be |
| 379 | zero. */ |
| 380 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 381 | 0, /* rightshift */ |
| 382 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 383 | 16, /* bitsize */ |
| 384 | TRUE, /* pc_relative */ |
| 385 | 0, /* bitpos */ |
| 386 | complain_overflow_signed, /* complain_on_overflow */ |
| 387 | bfd_elf_generic_reloc, /* special_function */ |
| 388 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 389 | FALSE, /* partial_inplace */ |
| 390 | 0, /* src_mask */ |
| 391 | 0xfffc, /* dst_mask */ |
| 392 | TRUE), /* pcrel_offset */ |
| 393 | |
| 394 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 395 | the branch is not expected to be taken. The lower two bits must |
| 396 | be zero. */ |
| 397 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 398 | 0, /* rightshift */ |
| 399 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 400 | 16, /* bitsize */ |
| 401 | TRUE, /* pc_relative */ |
| 402 | 0, /* bitpos */ |
| 403 | complain_overflow_signed, /* complain_on_overflow */ |
| 404 | bfd_elf_generic_reloc, /* special_function */ |
| 405 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 406 | FALSE, /* partial_inplace */ |
| 407 | 0, /* src_mask */ |
| 408 | 0xfffc, /* dst_mask */ |
| 409 | TRUE), /* pcrel_offset */ |
| 410 | |
| 411 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 412 | symbol. */ |
| 413 | HOWTO (R_PPC_GOT16, /* type */ |
| 414 | 0, /* rightshift */ |
| 415 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 416 | 16, /* bitsize */ |
| 417 | FALSE, /* pc_relative */ |
| 418 | 0, /* bitpos */ |
| 419 | complain_overflow_signed, /* complain_on_overflow */ |
| 420 | bfd_elf_generic_reloc, /* special_function */ |
| 421 | "R_PPC_GOT16", /* name */ |
| 422 | FALSE, /* partial_inplace */ |
| 423 | 0, /* src_mask */ |
| 424 | 0xffff, /* dst_mask */ |
| 425 | FALSE), /* pcrel_offset */ |
| 426 | |
| 427 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 428 | the symbol. */ |
| 429 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 430 | 0, /* rightshift */ |
| 431 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 432 | 16, /* bitsize */ |
| 433 | FALSE, /* pc_relative */ |
| 434 | 0, /* bitpos */ |
| 435 | complain_overflow_dont, /* complain_on_overflow */ |
| 436 | bfd_elf_generic_reloc, /* special_function */ |
| 437 | "R_PPC_GOT16_LO", /* name */ |
| 438 | FALSE, /* partial_inplace */ |
| 439 | 0, /* src_mask */ |
| 440 | 0xffff, /* dst_mask */ |
| 441 | FALSE), /* pcrel_offset */ |
| 442 | |
| 443 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 444 | the symbol. */ |
| 445 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 446 | 16, /* rightshift */ |
| 447 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 448 | 16, /* bitsize */ |
| 449 | FALSE, /* pc_relative */ |
| 450 | 0, /* bitpos */ |
| 451 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 452 | bfd_elf_generic_reloc, /* special_function */ |
| 453 | "R_PPC_GOT16_HI", /* name */ |
| 454 | FALSE, /* partial_inplace */ |
| 455 | 0, /* src_mask */ |
| 456 | 0xffff, /* dst_mask */ |
| 457 | FALSE), /* pcrel_offset */ |
| 458 | |
| 459 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 460 | the symbol. */ |
| 461 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 462 | 16, /* rightshift */ |
| 463 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 464 | 16, /* bitsize */ |
| 465 | FALSE, /* pc_relative */ |
| 466 | 0, /* bitpos */ |
| 467 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 468 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 469 | "R_PPC_GOT16_HA", /* name */ |
| 470 | FALSE, /* partial_inplace */ |
| 471 | 0, /* src_mask */ |
| 472 | 0xffff, /* dst_mask */ |
| 473 | FALSE), /* pcrel_offset */ |
| 474 | |
| 475 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 476 | entry for the symbol. */ |
| 477 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 478 | 0, /* rightshift */ |
| 479 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 480 | 26, /* bitsize */ |
| 481 | TRUE, /* pc_relative */ |
| 482 | 0, /* bitpos */ |
| 483 | complain_overflow_signed, /* complain_on_overflow */ |
| 484 | bfd_elf_generic_reloc, /* special_function */ |
| 485 | "R_PPC_PLTREL24", /* name */ |
| 486 | FALSE, /* partial_inplace */ |
| 487 | 0, /* src_mask */ |
| 488 | 0x3fffffc, /* dst_mask */ |
| 489 | TRUE), /* pcrel_offset */ |
| 490 | |
| 491 | /* This is used only by the dynamic linker. The symbol should exist |
| 492 | both in the object being run and in some shared library. The |
| 493 | dynamic linker copies the data addressed by the symbol from the |
| 494 | shared library into the object, because the object being |
| 495 | run has to have the data at some particular address. */ |
| 496 | HOWTO (R_PPC_COPY, /* type */ |
| 497 | 0, /* rightshift */ |
| 498 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 499 | 32, /* bitsize */ |
| 500 | FALSE, /* pc_relative */ |
| 501 | 0, /* bitpos */ |
| 502 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 503 | bfd_elf_generic_reloc, /* special_function */ |
| 504 | "R_PPC_COPY", /* name */ |
| 505 | FALSE, /* partial_inplace */ |
| 506 | 0, /* src_mask */ |
| 507 | 0, /* dst_mask */ |
| 508 | FALSE), /* pcrel_offset */ |
| 509 | |
| 510 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 511 | entries. */ |
| 512 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 513 | 0, /* rightshift */ |
| 514 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 515 | 32, /* bitsize */ |
| 516 | FALSE, /* pc_relative */ |
| 517 | 0, /* bitpos */ |
| 518 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 519 | bfd_elf_generic_reloc, /* special_function */ |
| 520 | "R_PPC_GLOB_DAT", /* name */ |
| 521 | FALSE, /* partial_inplace */ |
| 522 | 0, /* src_mask */ |
| 523 | 0xffffffff, /* dst_mask */ |
| 524 | FALSE), /* pcrel_offset */ |
| 525 | |
| 526 | /* Marks a procedure linkage table entry for a symbol. */ |
| 527 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 528 | 0, /* rightshift */ |
| 529 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 530 | 32, /* bitsize */ |
| 531 | FALSE, /* pc_relative */ |
| 532 | 0, /* bitpos */ |
| 533 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 534 | bfd_elf_generic_reloc, /* special_function */ |
| 535 | "R_PPC_JMP_SLOT", /* name */ |
| 536 | FALSE, /* partial_inplace */ |
| 537 | 0, /* src_mask */ |
| 538 | 0, /* dst_mask */ |
| 539 | FALSE), /* pcrel_offset */ |
| 540 | |
| 541 | /* Used only by the dynamic linker. When the object is run, this |
| 542 | longword is set to the load address of the object, plus the |
| 543 | addend. */ |
| 544 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 545 | 0, /* rightshift */ |
| 546 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 547 | 32, /* bitsize */ |
| 548 | FALSE, /* pc_relative */ |
| 549 | 0, /* bitpos */ |
| 550 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 551 | bfd_elf_generic_reloc, /* special_function */ |
| 552 | "R_PPC_RELATIVE", /* name */ |
| 553 | FALSE, /* partial_inplace */ |
| 554 | 0, /* src_mask */ |
| 555 | 0xffffffff, /* dst_mask */ |
| 556 | FALSE), /* pcrel_offset */ |
| 557 | |
| 558 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 559 | object rather than the final value. Normally used for |
| 560 | _GLOBAL_OFFSET_TABLE_. */ |
| 561 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 562 | 0, /* rightshift */ |
| 563 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 564 | 26, /* bitsize */ |
| 565 | TRUE, /* pc_relative */ |
| 566 | 0, /* bitpos */ |
| 567 | complain_overflow_signed, /* complain_on_overflow */ |
| 568 | bfd_elf_generic_reloc, /* special_function */ |
| 569 | "R_PPC_LOCAL24PC", /* name */ |
| 570 | FALSE, /* partial_inplace */ |
| 571 | 0, /* src_mask */ |
| 572 | 0x3fffffc, /* dst_mask */ |
| 573 | TRUE), /* pcrel_offset */ |
| 574 | |
| 575 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 576 | HOWTO (R_PPC_UADDR32, /* type */ |
| 577 | 0, /* rightshift */ |
| 578 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 579 | 32, /* bitsize */ |
| 580 | FALSE, /* pc_relative */ |
| 581 | 0, /* bitpos */ |
| 582 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 583 | bfd_elf_generic_reloc, /* special_function */ |
| 584 | "R_PPC_UADDR32", /* name */ |
| 585 | FALSE, /* partial_inplace */ |
| 586 | 0, /* src_mask */ |
| 587 | 0xffffffff, /* dst_mask */ |
| 588 | FALSE), /* pcrel_offset */ |
| 589 | |
| 590 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 591 | HOWTO (R_PPC_UADDR16, /* type */ |
| 592 | 0, /* rightshift */ |
| 593 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 594 | 16, /* bitsize */ |
| 595 | FALSE, /* pc_relative */ |
| 596 | 0, /* bitpos */ |
| 597 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 598 | bfd_elf_generic_reloc, /* special_function */ |
| 599 | "R_PPC_UADDR16", /* name */ |
| 600 | FALSE, /* partial_inplace */ |
| 601 | 0, /* src_mask */ |
| 602 | 0xffff, /* dst_mask */ |
| 603 | FALSE), /* pcrel_offset */ |
| 604 | |
| 605 | /* 32-bit PC relative */ |
| 606 | HOWTO (R_PPC_REL32, /* type */ |
| 607 | 0, /* rightshift */ |
| 608 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 609 | 32, /* bitsize */ |
| 610 | TRUE, /* pc_relative */ |
| 611 | 0, /* bitpos */ |
| 612 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 613 | bfd_elf_generic_reloc, /* special_function */ |
| 614 | "R_PPC_REL32", /* name */ |
| 615 | FALSE, /* partial_inplace */ |
| 616 | 0, /* src_mask */ |
| 617 | 0xffffffff, /* dst_mask */ |
| 618 | TRUE), /* pcrel_offset */ |
| 619 | |
| 620 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 621 | FIXME: not supported. */ |
| 622 | HOWTO (R_PPC_PLT32, /* type */ |
| 623 | 0, /* rightshift */ |
| 624 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 625 | 32, /* bitsize */ |
| 626 | FALSE, /* pc_relative */ |
| 627 | 0, /* bitpos */ |
| 628 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 629 | bfd_elf_generic_reloc, /* special_function */ |
| 630 | "R_PPC_PLT32", /* name */ |
| 631 | FALSE, /* partial_inplace */ |
| 632 | 0, /* src_mask */ |
| 633 | 0, /* dst_mask */ |
| 634 | FALSE), /* pcrel_offset */ |
| 635 | |
| 636 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 637 | FIXME: not supported. */ |
| 638 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 639 | 0, /* rightshift */ |
| 640 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 641 | 32, /* bitsize */ |
| 642 | TRUE, /* pc_relative */ |
| 643 | 0, /* bitpos */ |
| 644 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 645 | bfd_elf_generic_reloc, /* special_function */ |
| 646 | "R_PPC_PLTREL32", /* name */ |
| 647 | FALSE, /* partial_inplace */ |
| 648 | 0, /* src_mask */ |
| 649 | 0, /* dst_mask */ |
| 650 | TRUE), /* pcrel_offset */ |
| 651 | |
| 652 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 653 | the symbol. */ |
| 654 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 655 | 0, /* rightshift */ |
| 656 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 657 | 16, /* bitsize */ |
| 658 | FALSE, /* pc_relative */ |
| 659 | 0, /* bitpos */ |
| 660 | complain_overflow_dont, /* complain_on_overflow */ |
| 661 | bfd_elf_generic_reloc, /* special_function */ |
| 662 | "R_PPC_PLT16_LO", /* name */ |
| 663 | FALSE, /* partial_inplace */ |
| 664 | 0, /* src_mask */ |
| 665 | 0xffff, /* dst_mask */ |
| 666 | FALSE), /* pcrel_offset */ |
| 667 | |
| 668 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 669 | the symbol. */ |
| 670 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 671 | 16, /* rightshift */ |
| 672 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 673 | 16, /* bitsize */ |
| 674 | FALSE, /* pc_relative */ |
| 675 | 0, /* bitpos */ |
| 676 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 677 | bfd_elf_generic_reloc, /* special_function */ |
| 678 | "R_PPC_PLT16_HI", /* name */ |
| 679 | FALSE, /* partial_inplace */ |
| 680 | 0, /* src_mask */ |
| 681 | 0xffff, /* dst_mask */ |
| 682 | FALSE), /* pcrel_offset */ |
| 683 | |
| 684 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 685 | the symbol. */ |
| 686 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 687 | 16, /* rightshift */ |
| 688 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 689 | 16, /* bitsize */ |
| 690 | FALSE, /* pc_relative */ |
| 691 | 0, /* bitpos */ |
| 692 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 693 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 694 | "R_PPC_PLT16_HA", /* name */ |
| 695 | FALSE, /* partial_inplace */ |
| 696 | 0, /* src_mask */ |
| 697 | 0xffff, /* dst_mask */ |
| 698 | FALSE), /* pcrel_offset */ |
| 699 | |
| 700 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 701 | small data items. */ |
| 702 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 703 | 0, /* rightshift */ |
| 704 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 705 | 16, /* bitsize */ |
| 706 | FALSE, /* pc_relative */ |
| 707 | 0, /* bitpos */ |
| 708 | complain_overflow_signed, /* complain_on_overflow */ |
| 709 | bfd_elf_generic_reloc, /* special_function */ |
| 710 | "R_PPC_SDAREL16", /* name */ |
| 711 | FALSE, /* partial_inplace */ |
| 712 | 0, /* src_mask */ |
| 713 | 0xffff, /* dst_mask */ |
| 714 | FALSE), /* pcrel_offset */ |
| 715 | |
| 716 | /* 16-bit section relative relocation. */ |
| 717 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 718 | 0, /* rightshift */ |
| 719 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 720 | 16, /* bitsize */ |
| 721 | FALSE, /* pc_relative */ |
| 722 | 0, /* bitpos */ |
| 723 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 724 | bfd_elf_generic_reloc, /* special_function */ |
| 725 | "R_PPC_SECTOFF", /* name */ |
| 726 | FALSE, /* partial_inplace */ |
| 727 | 0, /* src_mask */ |
| 728 | 0xffff, /* dst_mask */ |
| 729 | FALSE), /* pcrel_offset */ |
| 730 | |
| 731 | /* 16-bit lower half section relative relocation. */ |
| 732 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 733 | 0, /* rightshift */ |
| 734 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 735 | 16, /* bitsize */ |
| 736 | FALSE, /* pc_relative */ |
| 737 | 0, /* bitpos */ |
| 738 | complain_overflow_dont, /* complain_on_overflow */ |
| 739 | bfd_elf_generic_reloc, /* special_function */ |
| 740 | "R_PPC_SECTOFF_LO", /* name */ |
| 741 | FALSE, /* partial_inplace */ |
| 742 | 0, /* src_mask */ |
| 743 | 0xffff, /* dst_mask */ |
| 744 | FALSE), /* pcrel_offset */ |
| 745 | |
| 746 | /* 16-bit upper half section relative relocation. */ |
| 747 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 748 | 16, /* rightshift */ |
| 749 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 750 | 16, /* bitsize */ |
| 751 | FALSE, /* pc_relative */ |
| 752 | 0, /* bitpos */ |
| 753 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 754 | bfd_elf_generic_reloc, /* special_function */ |
| 755 | "R_PPC_SECTOFF_HI", /* name */ |
| 756 | FALSE, /* partial_inplace */ |
| 757 | 0, /* src_mask */ |
| 758 | 0xffff, /* dst_mask */ |
| 759 | FALSE), /* pcrel_offset */ |
| 760 | |
| 761 | /* 16-bit upper half adjusted section relative relocation. */ |
| 762 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 763 | 16, /* rightshift */ |
| 764 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 765 | 16, /* bitsize */ |
| 766 | FALSE, /* pc_relative */ |
| 767 | 0, /* bitpos */ |
| 768 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 769 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 770 | "R_PPC_SECTOFF_HA", /* name */ |
| 771 | FALSE, /* partial_inplace */ |
| 772 | 0, /* src_mask */ |
| 773 | 0xffff, /* dst_mask */ |
| 774 | FALSE), /* pcrel_offset */ |
| 775 | |
| 776 | /* Marker relocs for TLS. */ |
| 777 | HOWTO (R_PPC_TLS, |
| 778 | 0, /* rightshift */ |
| 779 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 780 | 32, /* bitsize */ |
| 781 | FALSE, /* pc_relative */ |
| 782 | 0, /* bitpos */ |
| 783 | complain_overflow_dont, /* complain_on_overflow */ |
| 784 | bfd_elf_generic_reloc, /* special_function */ |
| 785 | "R_PPC_TLS", /* name */ |
| 786 | FALSE, /* partial_inplace */ |
| 787 | 0, /* src_mask */ |
| 788 | 0, /* dst_mask */ |
| 789 | FALSE), /* pcrel_offset */ |
| 790 | |
| 791 | HOWTO (R_PPC_TLSGD, |
| 792 | 0, /* rightshift */ |
| 793 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 794 | 32, /* bitsize */ |
| 795 | FALSE, /* pc_relative */ |
| 796 | 0, /* bitpos */ |
| 797 | complain_overflow_dont, /* complain_on_overflow */ |
| 798 | bfd_elf_generic_reloc, /* special_function */ |
| 799 | "R_PPC_TLSGD", /* name */ |
| 800 | FALSE, /* partial_inplace */ |
| 801 | 0, /* src_mask */ |
| 802 | 0, /* dst_mask */ |
| 803 | FALSE), /* pcrel_offset */ |
| 804 | |
| 805 | HOWTO (R_PPC_TLSLD, |
| 806 | 0, /* rightshift */ |
| 807 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 808 | 32, /* bitsize */ |
| 809 | FALSE, /* pc_relative */ |
| 810 | 0, /* bitpos */ |
| 811 | complain_overflow_dont, /* complain_on_overflow */ |
| 812 | bfd_elf_generic_reloc, /* special_function */ |
| 813 | "R_PPC_TLSLD", /* name */ |
| 814 | FALSE, /* partial_inplace */ |
| 815 | 0, /* src_mask */ |
| 816 | 0, /* dst_mask */ |
| 817 | FALSE), /* pcrel_offset */ |
| 818 | |
| 819 | /* Computes the load module index of the load module that contains the |
| 820 | definition of its TLS sym. */ |
| 821 | HOWTO (R_PPC_DTPMOD32, |
| 822 | 0, /* rightshift */ |
| 823 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 824 | 32, /* bitsize */ |
| 825 | FALSE, /* pc_relative */ |
| 826 | 0, /* bitpos */ |
| 827 | complain_overflow_dont, /* complain_on_overflow */ |
| 828 | ppc_elf_unhandled_reloc, /* special_function */ |
| 829 | "R_PPC_DTPMOD32", /* name */ |
| 830 | FALSE, /* partial_inplace */ |
| 831 | 0, /* src_mask */ |
| 832 | 0xffffffff, /* dst_mask */ |
| 833 | FALSE), /* pcrel_offset */ |
| 834 | |
| 835 | /* Computes a dtv-relative displacement, the difference between the value |
| 836 | of sym+add and the base address of the thread-local storage block that |
| 837 | contains the definition of sym, minus 0x8000. */ |
| 838 | HOWTO (R_PPC_DTPREL32, |
| 839 | 0, /* rightshift */ |
| 840 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 841 | 32, /* bitsize */ |
| 842 | FALSE, /* pc_relative */ |
| 843 | 0, /* bitpos */ |
| 844 | complain_overflow_dont, /* complain_on_overflow */ |
| 845 | ppc_elf_unhandled_reloc, /* special_function */ |
| 846 | "R_PPC_DTPREL32", /* name */ |
| 847 | FALSE, /* partial_inplace */ |
| 848 | 0, /* src_mask */ |
| 849 | 0xffffffff, /* dst_mask */ |
| 850 | FALSE), /* pcrel_offset */ |
| 851 | |
| 852 | /* A 16 bit dtprel reloc. */ |
| 853 | HOWTO (R_PPC_DTPREL16, |
| 854 | 0, /* rightshift */ |
| 855 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 856 | 16, /* bitsize */ |
| 857 | FALSE, /* pc_relative */ |
| 858 | 0, /* bitpos */ |
| 859 | complain_overflow_signed, /* complain_on_overflow */ |
| 860 | ppc_elf_unhandled_reloc, /* special_function */ |
| 861 | "R_PPC_DTPREL16", /* name */ |
| 862 | FALSE, /* partial_inplace */ |
| 863 | 0, /* src_mask */ |
| 864 | 0xffff, /* dst_mask */ |
| 865 | FALSE), /* pcrel_offset */ |
| 866 | |
| 867 | /* Like DTPREL16, but no overflow. */ |
| 868 | HOWTO (R_PPC_DTPREL16_LO, |
| 869 | 0, /* rightshift */ |
| 870 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 871 | 16, /* bitsize */ |
| 872 | FALSE, /* pc_relative */ |
| 873 | 0, /* bitpos */ |
| 874 | complain_overflow_dont, /* complain_on_overflow */ |
| 875 | ppc_elf_unhandled_reloc, /* special_function */ |
| 876 | "R_PPC_DTPREL16_LO", /* name */ |
| 877 | FALSE, /* partial_inplace */ |
| 878 | 0, /* src_mask */ |
| 879 | 0xffff, /* dst_mask */ |
| 880 | FALSE), /* pcrel_offset */ |
| 881 | |
| 882 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| 883 | HOWTO (R_PPC_DTPREL16_HI, |
| 884 | 16, /* rightshift */ |
| 885 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 886 | 16, /* bitsize */ |
| 887 | FALSE, /* pc_relative */ |
| 888 | 0, /* bitpos */ |
| 889 | complain_overflow_dont, /* complain_on_overflow */ |
| 890 | ppc_elf_unhandled_reloc, /* special_function */ |
| 891 | "R_PPC_DTPREL16_HI", /* name */ |
| 892 | FALSE, /* partial_inplace */ |
| 893 | 0, /* src_mask */ |
| 894 | 0xffff, /* dst_mask */ |
| 895 | FALSE), /* pcrel_offset */ |
| 896 | |
| 897 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| 898 | HOWTO (R_PPC_DTPREL16_HA, |
| 899 | 16, /* rightshift */ |
| 900 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 901 | 16, /* bitsize */ |
| 902 | FALSE, /* pc_relative */ |
| 903 | 0, /* bitpos */ |
| 904 | complain_overflow_dont, /* complain_on_overflow */ |
| 905 | ppc_elf_unhandled_reloc, /* special_function */ |
| 906 | "R_PPC_DTPREL16_HA", /* name */ |
| 907 | FALSE, /* partial_inplace */ |
| 908 | 0, /* src_mask */ |
| 909 | 0xffff, /* dst_mask */ |
| 910 | FALSE), /* pcrel_offset */ |
| 911 | |
| 912 | /* Computes a tp-relative displacement, the difference between the value of |
| 913 | sym+add and the value of the thread pointer (r13). */ |
| 914 | HOWTO (R_PPC_TPREL32, |
| 915 | 0, /* rightshift */ |
| 916 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 917 | 32, /* bitsize */ |
| 918 | FALSE, /* pc_relative */ |
| 919 | 0, /* bitpos */ |
| 920 | complain_overflow_dont, /* complain_on_overflow */ |
| 921 | ppc_elf_unhandled_reloc, /* special_function */ |
| 922 | "R_PPC_TPREL32", /* name */ |
| 923 | FALSE, /* partial_inplace */ |
| 924 | 0, /* src_mask */ |
| 925 | 0xffffffff, /* dst_mask */ |
| 926 | FALSE), /* pcrel_offset */ |
| 927 | |
| 928 | /* A 16 bit tprel reloc. */ |
| 929 | HOWTO (R_PPC_TPREL16, |
| 930 | 0, /* rightshift */ |
| 931 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 932 | 16, /* bitsize */ |
| 933 | FALSE, /* pc_relative */ |
| 934 | 0, /* bitpos */ |
| 935 | complain_overflow_signed, /* complain_on_overflow */ |
| 936 | ppc_elf_unhandled_reloc, /* special_function */ |
| 937 | "R_PPC_TPREL16", /* name */ |
| 938 | FALSE, /* partial_inplace */ |
| 939 | 0, /* src_mask */ |
| 940 | 0xffff, /* dst_mask */ |
| 941 | FALSE), /* pcrel_offset */ |
| 942 | |
| 943 | /* Like TPREL16, but no overflow. */ |
| 944 | HOWTO (R_PPC_TPREL16_LO, |
| 945 | 0, /* rightshift */ |
| 946 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 947 | 16, /* bitsize */ |
| 948 | FALSE, /* pc_relative */ |
| 949 | 0, /* bitpos */ |
| 950 | complain_overflow_dont, /* complain_on_overflow */ |
| 951 | ppc_elf_unhandled_reloc, /* special_function */ |
| 952 | "R_PPC_TPREL16_LO", /* name */ |
| 953 | FALSE, /* partial_inplace */ |
| 954 | 0, /* src_mask */ |
| 955 | 0xffff, /* dst_mask */ |
| 956 | FALSE), /* pcrel_offset */ |
| 957 | |
| 958 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| 959 | HOWTO (R_PPC_TPREL16_HI, |
| 960 | 16, /* rightshift */ |
| 961 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 962 | 16, /* bitsize */ |
| 963 | FALSE, /* pc_relative */ |
| 964 | 0, /* bitpos */ |
| 965 | complain_overflow_dont, /* complain_on_overflow */ |
| 966 | ppc_elf_unhandled_reloc, /* special_function */ |
| 967 | "R_PPC_TPREL16_HI", /* name */ |
| 968 | FALSE, /* partial_inplace */ |
| 969 | 0, /* src_mask */ |
| 970 | 0xffff, /* dst_mask */ |
| 971 | FALSE), /* pcrel_offset */ |
| 972 | |
| 973 | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| 974 | HOWTO (R_PPC_TPREL16_HA, |
| 975 | 16, /* rightshift */ |
| 976 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 977 | 16, /* bitsize */ |
| 978 | FALSE, /* pc_relative */ |
| 979 | 0, /* bitpos */ |
| 980 | complain_overflow_dont, /* complain_on_overflow */ |
| 981 | ppc_elf_unhandled_reloc, /* special_function */ |
| 982 | "R_PPC_TPREL16_HA", /* name */ |
| 983 | FALSE, /* partial_inplace */ |
| 984 | 0, /* src_mask */ |
| 985 | 0xffff, /* dst_mask */ |
| 986 | FALSE), /* pcrel_offset */ |
| 987 | |
| 988 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 989 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| 990 | to the first entry. */ |
| 991 | HOWTO (R_PPC_GOT_TLSGD16, |
| 992 | 0, /* rightshift */ |
| 993 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 994 | 16, /* bitsize */ |
| 995 | FALSE, /* pc_relative */ |
| 996 | 0, /* bitpos */ |
| 997 | complain_overflow_signed, /* complain_on_overflow */ |
| 998 | ppc_elf_unhandled_reloc, /* special_function */ |
| 999 | "R_PPC_GOT_TLSGD16", /* name */ |
| 1000 | FALSE, /* partial_inplace */ |
| 1001 | 0, /* src_mask */ |
| 1002 | 0xffff, /* dst_mask */ |
| 1003 | FALSE), /* pcrel_offset */ |
| 1004 | |
| 1005 | /* Like GOT_TLSGD16, but no overflow. */ |
| 1006 | HOWTO (R_PPC_GOT_TLSGD16_LO, |
| 1007 | 0, /* rightshift */ |
| 1008 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1009 | 16, /* bitsize */ |
| 1010 | FALSE, /* pc_relative */ |
| 1011 | 0, /* bitpos */ |
| 1012 | complain_overflow_dont, /* complain_on_overflow */ |
| 1013 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1014 | "R_PPC_GOT_TLSGD16_LO", /* name */ |
| 1015 | FALSE, /* partial_inplace */ |
| 1016 | 0, /* src_mask */ |
| 1017 | 0xffff, /* dst_mask */ |
| 1018 | FALSE), /* pcrel_offset */ |
| 1019 | |
| 1020 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| 1021 | HOWTO (R_PPC_GOT_TLSGD16_HI, |
| 1022 | 16, /* rightshift */ |
| 1023 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1024 | 16, /* bitsize */ |
| 1025 | FALSE, /* pc_relative */ |
| 1026 | 0, /* bitpos */ |
| 1027 | complain_overflow_dont, /* complain_on_overflow */ |
| 1028 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1029 | "R_PPC_GOT_TLSGD16_HI", /* name */ |
| 1030 | FALSE, /* partial_inplace */ |
| 1031 | 0, /* src_mask */ |
| 1032 | 0xffff, /* dst_mask */ |
| 1033 | FALSE), /* pcrel_offset */ |
| 1034 | |
| 1035 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| 1036 | HOWTO (R_PPC_GOT_TLSGD16_HA, |
| 1037 | 16, /* rightshift */ |
| 1038 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1039 | 16, /* bitsize */ |
| 1040 | FALSE, /* pc_relative */ |
| 1041 | 0, /* bitpos */ |
| 1042 | complain_overflow_dont, /* complain_on_overflow */ |
| 1043 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1044 | "R_PPC_GOT_TLSGD16_HA", /* name */ |
| 1045 | FALSE, /* partial_inplace */ |
| 1046 | 0, /* src_mask */ |
| 1047 | 0xffff, /* dst_mask */ |
| 1048 | FALSE), /* pcrel_offset */ |
| 1049 | |
| 1050 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 1051 | with values (sym+add)@dtpmod and zero, and computes the offset to the |
| 1052 | first entry. */ |
| 1053 | HOWTO (R_PPC_GOT_TLSLD16, |
| 1054 | 0, /* rightshift */ |
| 1055 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1056 | 16, /* bitsize */ |
| 1057 | FALSE, /* pc_relative */ |
| 1058 | 0, /* bitpos */ |
| 1059 | complain_overflow_signed, /* complain_on_overflow */ |
| 1060 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1061 | "R_PPC_GOT_TLSLD16", /* name */ |
| 1062 | FALSE, /* partial_inplace */ |
| 1063 | 0, /* src_mask */ |
| 1064 | 0xffff, /* dst_mask */ |
| 1065 | FALSE), /* pcrel_offset */ |
| 1066 | |
| 1067 | /* Like GOT_TLSLD16, but no overflow. */ |
| 1068 | HOWTO (R_PPC_GOT_TLSLD16_LO, |
| 1069 | 0, /* rightshift */ |
| 1070 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1071 | 16, /* bitsize */ |
| 1072 | FALSE, /* pc_relative */ |
| 1073 | 0, /* bitpos */ |
| 1074 | complain_overflow_dont, /* complain_on_overflow */ |
| 1075 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1076 | "R_PPC_GOT_TLSLD16_LO", /* name */ |
| 1077 | FALSE, /* partial_inplace */ |
| 1078 | 0, /* src_mask */ |
| 1079 | 0xffff, /* dst_mask */ |
| 1080 | FALSE), /* pcrel_offset */ |
| 1081 | |
| 1082 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| 1083 | HOWTO (R_PPC_GOT_TLSLD16_HI, |
| 1084 | 16, /* rightshift */ |
| 1085 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1086 | 16, /* bitsize */ |
| 1087 | FALSE, /* pc_relative */ |
| 1088 | 0, /* bitpos */ |
| 1089 | complain_overflow_dont, /* complain_on_overflow */ |
| 1090 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1091 | "R_PPC_GOT_TLSLD16_HI", /* name */ |
| 1092 | FALSE, /* partial_inplace */ |
| 1093 | 0, /* src_mask */ |
| 1094 | 0xffff, /* dst_mask */ |
| 1095 | FALSE), /* pcrel_offset */ |
| 1096 | |
| 1097 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| 1098 | HOWTO (R_PPC_GOT_TLSLD16_HA, |
| 1099 | 16, /* rightshift */ |
| 1100 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1101 | 16, /* bitsize */ |
| 1102 | FALSE, /* pc_relative */ |
| 1103 | 0, /* bitpos */ |
| 1104 | complain_overflow_dont, /* complain_on_overflow */ |
| 1105 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1106 | "R_PPC_GOT_TLSLD16_HA", /* name */ |
| 1107 | FALSE, /* partial_inplace */ |
| 1108 | 0, /* src_mask */ |
| 1109 | 0xffff, /* dst_mask */ |
| 1110 | FALSE), /* pcrel_offset */ |
| 1111 | |
| 1112 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| 1113 | the offset to the entry. */ |
| 1114 | HOWTO (R_PPC_GOT_DTPREL16, |
| 1115 | 0, /* rightshift */ |
| 1116 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1117 | 16, /* bitsize */ |
| 1118 | FALSE, /* pc_relative */ |
| 1119 | 0, /* bitpos */ |
| 1120 | complain_overflow_signed, /* complain_on_overflow */ |
| 1121 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1122 | "R_PPC_GOT_DTPREL16", /* name */ |
| 1123 | FALSE, /* partial_inplace */ |
| 1124 | 0, /* src_mask */ |
| 1125 | 0xffff, /* dst_mask */ |
| 1126 | FALSE), /* pcrel_offset */ |
| 1127 | |
| 1128 | /* Like GOT_DTPREL16, but no overflow. */ |
| 1129 | HOWTO (R_PPC_GOT_DTPREL16_LO, |
| 1130 | 0, /* rightshift */ |
| 1131 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1132 | 16, /* bitsize */ |
| 1133 | FALSE, /* pc_relative */ |
| 1134 | 0, /* bitpos */ |
| 1135 | complain_overflow_dont, /* complain_on_overflow */ |
| 1136 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1137 | "R_PPC_GOT_DTPREL16_LO", /* name */ |
| 1138 | FALSE, /* partial_inplace */ |
| 1139 | 0, /* src_mask */ |
| 1140 | 0xffff, /* dst_mask */ |
| 1141 | FALSE), /* pcrel_offset */ |
| 1142 | |
| 1143 | /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ |
| 1144 | HOWTO (R_PPC_GOT_DTPREL16_HI, |
| 1145 | 16, /* rightshift */ |
| 1146 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1147 | 16, /* bitsize */ |
| 1148 | FALSE, /* pc_relative */ |
| 1149 | 0, /* bitpos */ |
| 1150 | complain_overflow_dont, /* complain_on_overflow */ |
| 1151 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1152 | "R_PPC_GOT_DTPREL16_HI", /* name */ |
| 1153 | FALSE, /* partial_inplace */ |
| 1154 | 0, /* src_mask */ |
| 1155 | 0xffff, /* dst_mask */ |
| 1156 | FALSE), /* pcrel_offset */ |
| 1157 | |
| 1158 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| 1159 | HOWTO (R_PPC_GOT_DTPREL16_HA, |
| 1160 | 16, /* rightshift */ |
| 1161 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1162 | 16, /* bitsize */ |
| 1163 | FALSE, /* pc_relative */ |
| 1164 | 0, /* bitpos */ |
| 1165 | complain_overflow_dont, /* complain_on_overflow */ |
| 1166 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1167 | "R_PPC_GOT_DTPREL16_HA", /* name */ |
| 1168 | FALSE, /* partial_inplace */ |
| 1169 | 0, /* src_mask */ |
| 1170 | 0xffff, /* dst_mask */ |
| 1171 | FALSE), /* pcrel_offset */ |
| 1172 | |
| 1173 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| 1174 | offset to the entry. */ |
| 1175 | HOWTO (R_PPC_GOT_TPREL16, |
| 1176 | 0, /* rightshift */ |
| 1177 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1178 | 16, /* bitsize */ |
| 1179 | FALSE, /* pc_relative */ |
| 1180 | 0, /* bitpos */ |
| 1181 | complain_overflow_signed, /* complain_on_overflow */ |
| 1182 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1183 | "R_PPC_GOT_TPREL16", /* name */ |
| 1184 | FALSE, /* partial_inplace */ |
| 1185 | 0, /* src_mask */ |
| 1186 | 0xffff, /* dst_mask */ |
| 1187 | FALSE), /* pcrel_offset */ |
| 1188 | |
| 1189 | /* Like GOT_TPREL16, but no overflow. */ |
| 1190 | HOWTO (R_PPC_GOT_TPREL16_LO, |
| 1191 | 0, /* rightshift */ |
| 1192 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1193 | 16, /* bitsize */ |
| 1194 | FALSE, /* pc_relative */ |
| 1195 | 0, /* bitpos */ |
| 1196 | complain_overflow_dont, /* complain_on_overflow */ |
| 1197 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1198 | "R_PPC_GOT_TPREL16_LO", /* name */ |
| 1199 | FALSE, /* partial_inplace */ |
| 1200 | 0, /* src_mask */ |
| 1201 | 0xffff, /* dst_mask */ |
| 1202 | FALSE), /* pcrel_offset */ |
| 1203 | |
| 1204 | /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ |
| 1205 | HOWTO (R_PPC_GOT_TPREL16_HI, |
| 1206 | 16, /* rightshift */ |
| 1207 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1208 | 16, /* bitsize */ |
| 1209 | FALSE, /* pc_relative */ |
| 1210 | 0, /* bitpos */ |
| 1211 | complain_overflow_dont, /* complain_on_overflow */ |
| 1212 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1213 | "R_PPC_GOT_TPREL16_HI", /* name */ |
| 1214 | FALSE, /* partial_inplace */ |
| 1215 | 0, /* src_mask */ |
| 1216 | 0xffff, /* dst_mask */ |
| 1217 | FALSE), /* pcrel_offset */ |
| 1218 | |
| 1219 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| 1220 | HOWTO (R_PPC_GOT_TPREL16_HA, |
| 1221 | 16, /* rightshift */ |
| 1222 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1223 | 16, /* bitsize */ |
| 1224 | FALSE, /* pc_relative */ |
| 1225 | 0, /* bitpos */ |
| 1226 | complain_overflow_dont, /* complain_on_overflow */ |
| 1227 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1228 | "R_PPC_GOT_TPREL16_HA", /* name */ |
| 1229 | FALSE, /* partial_inplace */ |
| 1230 | 0, /* src_mask */ |
| 1231 | 0xffff, /* dst_mask */ |
| 1232 | FALSE), /* pcrel_offset */ |
| 1233 | |
| 1234 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 1235 | in the SVR4 ELF ABI. */ |
| 1236 | |
| 1237 | /* 32 bit value resulting from the addend minus the symbol. */ |
| 1238 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 1239 | 0, /* rightshift */ |
| 1240 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1241 | 32, /* bitsize */ |
| 1242 | FALSE, /* pc_relative */ |
| 1243 | 0, /* bitpos */ |
| 1244 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1245 | bfd_elf_generic_reloc, /* special_function */ |
| 1246 | "R_PPC_EMB_NADDR32", /* name */ |
| 1247 | FALSE, /* partial_inplace */ |
| 1248 | 0, /* src_mask */ |
| 1249 | 0xffffffff, /* dst_mask */ |
| 1250 | FALSE), /* pcrel_offset */ |
| 1251 | |
| 1252 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1253 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 1254 | 0, /* rightshift */ |
| 1255 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1256 | 16, /* bitsize */ |
| 1257 | FALSE, /* pc_relative */ |
| 1258 | 0, /* bitpos */ |
| 1259 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1260 | bfd_elf_generic_reloc, /* special_function */ |
| 1261 | "R_PPC_EMB_NADDR16", /* name */ |
| 1262 | FALSE, /* partial_inplace */ |
| 1263 | 0, /* src_mask */ |
| 1264 | 0xffff, /* dst_mask */ |
| 1265 | FALSE), /* pcrel_offset */ |
| 1266 | |
| 1267 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1268 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 1269 | 0, /* rightshift */ |
| 1270 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1271 | 16, /* bitsize */ |
| 1272 | FALSE, /* pc_relative */ |
| 1273 | 0, /* bitpos */ |
| 1274 | complain_overflow_dont,/* complain_on_overflow */ |
| 1275 | bfd_elf_generic_reloc, /* special_function */ |
| 1276 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 1277 | FALSE, /* partial_inplace */ |
| 1278 | 0, /* src_mask */ |
| 1279 | 0xffff, /* dst_mask */ |
| 1280 | FALSE), /* pcrel_offset */ |
| 1281 | |
| 1282 | /* The high order 16 bits of the addend minus the symbol. */ |
| 1283 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 1284 | 16, /* rightshift */ |
| 1285 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1286 | 16, /* bitsize */ |
| 1287 | FALSE, /* pc_relative */ |
| 1288 | 0, /* bitpos */ |
| 1289 | complain_overflow_dont, /* complain_on_overflow */ |
| 1290 | bfd_elf_generic_reloc, /* special_function */ |
| 1291 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 1292 | FALSE, /* partial_inplace */ |
| 1293 | 0, /* src_mask */ |
| 1294 | 0xffff, /* dst_mask */ |
| 1295 | FALSE), /* pcrel_offset */ |
| 1296 | |
| 1297 | /* The high order 16 bits of the result of the addend minus the address, |
| 1298 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 1299 | is negative. */ |
| 1300 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 1301 | 16, /* rightshift */ |
| 1302 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1303 | 16, /* bitsize */ |
| 1304 | FALSE, /* pc_relative */ |
| 1305 | 0, /* bitpos */ |
| 1306 | complain_overflow_dont, /* complain_on_overflow */ |
| 1307 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1308 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 1309 | FALSE, /* partial_inplace */ |
| 1310 | 0, /* src_mask */ |
| 1311 | 0xffff, /* dst_mask */ |
| 1312 | FALSE), /* pcrel_offset */ |
| 1313 | |
| 1314 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1315 | address in the .sdata section, and returning the offset from |
| 1316 | _SDA_BASE_ for that relocation. */ |
| 1317 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 1318 | 0, /* rightshift */ |
| 1319 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1320 | 16, /* bitsize */ |
| 1321 | FALSE, /* pc_relative */ |
| 1322 | 0, /* bitpos */ |
| 1323 | complain_overflow_signed, /* complain_on_overflow */ |
| 1324 | bfd_elf_generic_reloc, /* special_function */ |
| 1325 | "R_PPC_EMB_SDAI16", /* name */ |
| 1326 | FALSE, /* partial_inplace */ |
| 1327 | 0, /* src_mask */ |
| 1328 | 0xffff, /* dst_mask */ |
| 1329 | FALSE), /* pcrel_offset */ |
| 1330 | |
| 1331 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1332 | address in the .sdata2 section, and returning the offset from |
| 1333 | _SDA2_BASE_ for that relocation. */ |
| 1334 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 1335 | 0, /* rightshift */ |
| 1336 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1337 | 16, /* bitsize */ |
| 1338 | FALSE, /* pc_relative */ |
| 1339 | 0, /* bitpos */ |
| 1340 | complain_overflow_signed, /* complain_on_overflow */ |
| 1341 | bfd_elf_generic_reloc, /* special_function */ |
| 1342 | "R_PPC_EMB_SDA2I16", /* name */ |
| 1343 | FALSE, /* partial_inplace */ |
| 1344 | 0, /* src_mask */ |
| 1345 | 0xffff, /* dst_mask */ |
| 1346 | FALSE), /* pcrel_offset */ |
| 1347 | |
| 1348 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 1349 | small data items. */ |
| 1350 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 1351 | 0, /* rightshift */ |
| 1352 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1353 | 16, /* bitsize */ |
| 1354 | FALSE, /* pc_relative */ |
| 1355 | 0, /* bitpos */ |
| 1356 | complain_overflow_signed, /* complain_on_overflow */ |
| 1357 | bfd_elf_generic_reloc, /* special_function */ |
| 1358 | "R_PPC_EMB_SDA2REL", /* name */ |
| 1359 | FALSE, /* partial_inplace */ |
| 1360 | 0, /* src_mask */ |
| 1361 | 0xffff, /* dst_mask */ |
| 1362 | FALSE), /* pcrel_offset */ |
| 1363 | |
| 1364 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 1365 | signed offset from the appropriate base, and filling in the register |
| 1366 | field with the appropriate register (0, 2, or 13). */ |
| 1367 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 1368 | 0, /* rightshift */ |
| 1369 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1370 | 16, /* bitsize */ |
| 1371 | FALSE, /* pc_relative */ |
| 1372 | 0, /* bitpos */ |
| 1373 | complain_overflow_signed, /* complain_on_overflow */ |
| 1374 | bfd_elf_generic_reloc, /* special_function */ |
| 1375 | "R_PPC_EMB_SDA21", /* name */ |
| 1376 | FALSE, /* partial_inplace */ |
| 1377 | 0, /* src_mask */ |
| 1378 | 0xffff, /* dst_mask */ |
| 1379 | FALSE), /* pcrel_offset */ |
| 1380 | |
| 1381 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 1382 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 1383 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 1384 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 1385 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 1386 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 1387 | |
| 1388 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 1389 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 1390 | register field with the appropriate register (0, 2, or 13). */ |
| 1391 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 1392 | 0, /* rightshift */ |
| 1393 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1394 | 16, /* bitsize */ |
| 1395 | FALSE, /* pc_relative */ |
| 1396 | 0, /* bitpos */ |
| 1397 | complain_overflow_signed, /* complain_on_overflow */ |
| 1398 | bfd_elf_generic_reloc, /* special_function */ |
| 1399 | "R_PPC_EMB_RELSDA", /* name */ |
| 1400 | FALSE, /* partial_inplace */ |
| 1401 | 0, /* src_mask */ |
| 1402 | 0xffff, /* dst_mask */ |
| 1403 | FALSE), /* pcrel_offset */ |
| 1404 | |
| 1405 | /* A relative 8 bit branch. */ |
| 1406 | HOWTO (R_PPC_VLE_REL8, /* type */ |
| 1407 | 1, /* rightshift */ |
| 1408 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1409 | 8, /* bitsize */ |
| 1410 | TRUE, /* pc_relative */ |
| 1411 | 0, /* bitpos */ |
| 1412 | complain_overflow_signed, /* complain_on_overflow */ |
| 1413 | bfd_elf_generic_reloc, /* special_function */ |
| 1414 | "R_PPC_VLE_REL8", /* name */ |
| 1415 | FALSE, /* partial_inplace */ |
| 1416 | 0, /* src_mask */ |
| 1417 | 0xff, /* dst_mask */ |
| 1418 | TRUE), /* pcrel_offset */ |
| 1419 | |
| 1420 | /* A relative 15 bit branch. */ |
| 1421 | HOWTO (R_PPC_VLE_REL15, /* type */ |
| 1422 | 1, /* rightshift */ |
| 1423 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1424 | 15, /* bitsize */ |
| 1425 | TRUE, /* pc_relative */ |
| 1426 | 1, /* bitpos */ |
| 1427 | complain_overflow_signed, /* complain_on_overflow */ |
| 1428 | bfd_elf_generic_reloc, /* special_function */ |
| 1429 | "R_PPC_VLE_REL15", /* name */ |
| 1430 | FALSE, /* partial_inplace */ |
| 1431 | 0, /* src_mask */ |
| 1432 | 0xfe, /* dst_mask */ |
| 1433 | TRUE), /* pcrel_offset */ |
| 1434 | |
| 1435 | /* A relative 24 bit branch. */ |
| 1436 | HOWTO (R_PPC_VLE_REL24, /* type */ |
| 1437 | 1, /* rightshift */ |
| 1438 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1439 | 24, /* bitsize */ |
| 1440 | TRUE, /* pc_relative */ |
| 1441 | 1, /* bitpos */ |
| 1442 | complain_overflow_signed, /* complain_on_overflow */ |
| 1443 | bfd_elf_generic_reloc, /* special_function */ |
| 1444 | "R_PPC_VLE_REL24", /* name */ |
| 1445 | FALSE, /* partial_inplace */ |
| 1446 | 0, /* src_mask */ |
| 1447 | 0x1fffffe, /* dst_mask */ |
| 1448 | TRUE), /* pcrel_offset */ |
| 1449 | |
| 1450 | /* The 16 LSBS in split16a format. */ |
| 1451 | HOWTO (R_PPC_VLE_LO16A, /* type */ |
| 1452 | 0, /* rightshift */ |
| 1453 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1454 | 32, /* bitsize */ |
| 1455 | FALSE, /* pc_relative */ |
| 1456 | 0, /* bitpos */ |
| 1457 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1458 | bfd_elf_generic_reloc, /* special_function */ |
| 1459 | "R_PPC_VLE_LO16A", /* name */ |
| 1460 | FALSE, /* partial_inplace */ |
| 1461 | 0, /* src_mask */ |
| 1462 | 0x1f007ff, /* dst_mask */ |
| 1463 | FALSE), /* pcrel_offset */ |
| 1464 | |
| 1465 | /* The 16 LSBS in split16d format. */ |
| 1466 | HOWTO (R_PPC_VLE_LO16D, /* type */ |
| 1467 | 0, /* rightshift */ |
| 1468 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1469 | 32, /* bitsize */ |
| 1470 | FALSE, /* pc_relative */ |
| 1471 | 0, /* bitpos */ |
| 1472 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1473 | bfd_elf_generic_reloc, /* special_function */ |
| 1474 | "R_PPC_VLE_LO16D", /* name */ |
| 1475 | FALSE, /* partial_inplace */ |
| 1476 | 0, /* src_mask */ |
| 1477 | 0x1f07ff, /* dst_mask */ |
| 1478 | FALSE), /* pcrel_offset */ |
| 1479 | |
| 1480 | /* Bits 16-31 split16a format. */ |
| 1481 | HOWTO (R_PPC_VLE_HI16A, /* type */ |
| 1482 | 0, /* rightshift */ |
| 1483 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1484 | 32, /* bitsize */ |
| 1485 | FALSE, /* pc_relative */ |
| 1486 | 0, /* bitpos */ |
| 1487 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1488 | bfd_elf_generic_reloc, /* special_function */ |
| 1489 | "R_PPC_VLE_HI16A", /* name */ |
| 1490 | FALSE, /* partial_inplace */ |
| 1491 | 0, /* src_mask */ |
| 1492 | 0x1f007ff, /* dst_mask */ |
| 1493 | FALSE), /* pcrel_offset */ |
| 1494 | |
| 1495 | /* Bits 16-31 split16d format. */ |
| 1496 | HOWTO (R_PPC_VLE_HI16D, /* type */ |
| 1497 | 0, /* rightshift */ |
| 1498 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1499 | 32, /* bitsize */ |
| 1500 | FALSE, /* pc_relative */ |
| 1501 | 0, /* bitpos */ |
| 1502 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1503 | bfd_elf_generic_reloc, /* special_function */ |
| 1504 | "R_PPC_VLE_HI16D", /* name */ |
| 1505 | FALSE, /* partial_inplace */ |
| 1506 | 0, /* src_mask */ |
| 1507 | 0x1f07ff, /* dst_mask */ |
| 1508 | FALSE), /* pcrel_offset */ |
| 1509 | |
| 1510 | /* Bits 16-31 (High Adjusted) in split16a format. */ |
| 1511 | HOWTO (R_PPC_VLE_HA16A, /* type */ |
| 1512 | 0, /* rightshift */ |
| 1513 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1514 | 32, /* bitsize */ |
| 1515 | FALSE, /* pc_relative */ |
| 1516 | 0, /* bitpos */ |
| 1517 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1518 | bfd_elf_generic_reloc, /* special_function */ |
| 1519 | "R_PPC_VLE_HA16A", /* name */ |
| 1520 | FALSE, /* partial_inplace */ |
| 1521 | 0, /* src_mask */ |
| 1522 | 0x1f007ff, /* dst_mask */ |
| 1523 | FALSE), /* pcrel_offset */ |
| 1524 | |
| 1525 | /* Bits 16-31 (High Adjusted) in split16d format. */ |
| 1526 | HOWTO (R_PPC_VLE_HA16D, /* type */ |
| 1527 | 0, /* rightshift */ |
| 1528 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1529 | 32, /* bitsize */ |
| 1530 | FALSE, /* pc_relative */ |
| 1531 | 0, /* bitpos */ |
| 1532 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1533 | bfd_elf_generic_reloc, /* special_function */ |
| 1534 | "R_PPC_VLE_HA16D", /* name */ |
| 1535 | FALSE, /* partial_inplace */ |
| 1536 | 0, /* src_mask */ |
| 1537 | 0x1f07ff, /* dst_mask */ |
| 1538 | FALSE), /* pcrel_offset */ |
| 1539 | |
| 1540 | /* This reloc does nothing. */ |
| 1541 | HOWTO (R_PPC_VLE_SDA21, /* type */ |
| 1542 | 0, /* rightshift */ |
| 1543 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1544 | 32, /* bitsize */ |
| 1545 | FALSE, /* pc_relative */ |
| 1546 | 0, /* bitpos */ |
| 1547 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1548 | bfd_elf_generic_reloc, /* special_function */ |
| 1549 | "R_PPC_VLE_SDA21", /* name */ |
| 1550 | FALSE, /* partial_inplace */ |
| 1551 | 0, /* src_mask */ |
| 1552 | 0xffff, /* dst_mask */ |
| 1553 | FALSE), /* pcrel_offset */ |
| 1554 | |
| 1555 | /* This reloc does nothing. */ |
| 1556 | HOWTO (R_PPC_VLE_SDA21_LO, /* type */ |
| 1557 | 0, /* rightshift */ |
| 1558 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1559 | 32, /* bitsize */ |
| 1560 | FALSE, /* pc_relative */ |
| 1561 | 0, /* bitpos */ |
| 1562 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1563 | bfd_elf_generic_reloc, /* special_function */ |
| 1564 | "R_PPC_VLE_SDA21_LO", /* name */ |
| 1565 | FALSE, /* partial_inplace */ |
| 1566 | 0, /* src_mask */ |
| 1567 | 0, /* dst_mask */ |
| 1568 | FALSE), /* pcrel_offset */ |
| 1569 | |
| 1570 | /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ |
| 1571 | HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ |
| 1572 | 0, /* rightshift */ |
| 1573 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1574 | 32, /* bitsize */ |
| 1575 | FALSE, /* pc_relative */ |
| 1576 | 0, /* bitpos */ |
| 1577 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1578 | bfd_elf_generic_reloc, /* special_function */ |
| 1579 | "R_PPC_VLE_SDAREL_LO16A", /* name */ |
| 1580 | FALSE, /* partial_inplace */ |
| 1581 | 0, /* src_mask */ |
| 1582 | 0x1f007ff, /* dst_mask */ |
| 1583 | FALSE), /* pcrel_offset */ |
| 1584 | |
| 1585 | /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ |
| 1586 | /* This reloc does nothing. */ |
| 1587 | HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ |
| 1588 | 0, /* rightshift */ |
| 1589 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1590 | 32, /* bitsize */ |
| 1591 | FALSE, /* pc_relative */ |
| 1592 | 0, /* bitpos */ |
| 1593 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1594 | bfd_elf_generic_reloc, /* special_function */ |
| 1595 | "R_PPC_VLE_SDAREL_LO16D", /* name */ |
| 1596 | FALSE, /* partial_inplace */ |
| 1597 | 0, /* src_mask */ |
| 1598 | 0x1f07ff, /* dst_mask */ |
| 1599 | FALSE), /* pcrel_offset */ |
| 1600 | |
| 1601 | /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ |
| 1602 | HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ |
| 1603 | 0, /* rightshift */ |
| 1604 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1605 | 32, /* bitsize */ |
| 1606 | FALSE, /* pc_relative */ |
| 1607 | 0, /* bitpos */ |
| 1608 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1609 | bfd_elf_generic_reloc, /* special_function */ |
| 1610 | "R_PPC_VLE_SDAREL_HI16A", /* name */ |
| 1611 | FALSE, /* partial_inplace */ |
| 1612 | 0, /* src_mask */ |
| 1613 | 0x1f007ff, /* dst_mask */ |
| 1614 | FALSE), /* pcrel_offset */ |
| 1615 | |
| 1616 | /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ |
| 1617 | HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ |
| 1618 | 0, /* rightshift */ |
| 1619 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1620 | 32, /* bitsize */ |
| 1621 | FALSE, /* pc_relative */ |
| 1622 | 0, /* bitpos */ |
| 1623 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1624 | bfd_elf_generic_reloc, /* special_function */ |
| 1625 | "R_PPC_VLE_SDAREL_HI16D", /* name */ |
| 1626 | FALSE, /* partial_inplace */ |
| 1627 | 0, /* src_mask */ |
| 1628 | 0x1f07ff, /* dst_mask */ |
| 1629 | FALSE), /* pcrel_offset */ |
| 1630 | |
| 1631 | /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ |
| 1632 | HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ |
| 1633 | 0, /* rightshift */ |
| 1634 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1635 | 32, /* bitsize */ |
| 1636 | FALSE, /* pc_relative */ |
| 1637 | 0, /* bitpos */ |
| 1638 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1639 | bfd_elf_generic_reloc, /* special_function */ |
| 1640 | "R_PPC_VLE_SDAREL_HA16A", /* name */ |
| 1641 | FALSE, /* partial_inplace */ |
| 1642 | 0, /* src_mask */ |
| 1643 | 0x1f007ff, /* dst_mask */ |
| 1644 | FALSE), /* pcrel_offset */ |
| 1645 | |
| 1646 | /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ |
| 1647 | HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ |
| 1648 | 0, /* rightshift */ |
| 1649 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1650 | 32, /* bitsize */ |
| 1651 | FALSE, /* pc_relative */ |
| 1652 | 0, /* bitpos */ |
| 1653 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1654 | bfd_elf_generic_reloc, /* special_function */ |
| 1655 | "R_PPC_VLE_SDAREL_HA16D", /* name */ |
| 1656 | FALSE, /* partial_inplace */ |
| 1657 | 0, /* src_mask */ |
| 1658 | 0x1f07ff, /* dst_mask */ |
| 1659 | FALSE), /* pcrel_offset */ |
| 1660 | |
| 1661 | HOWTO (R_PPC_IRELATIVE, /* type */ |
| 1662 | 0, /* rightshift */ |
| 1663 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1664 | 32, /* bitsize */ |
| 1665 | FALSE, /* pc_relative */ |
| 1666 | 0, /* bitpos */ |
| 1667 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1668 | bfd_elf_generic_reloc, /* special_function */ |
| 1669 | "R_PPC_IRELATIVE", /* name */ |
| 1670 | FALSE, /* partial_inplace */ |
| 1671 | 0, /* src_mask */ |
| 1672 | 0xffffffff, /* dst_mask */ |
| 1673 | FALSE), /* pcrel_offset */ |
| 1674 | |
| 1675 | /* A 16 bit relative relocation. */ |
| 1676 | HOWTO (R_PPC_REL16, /* type */ |
| 1677 | 0, /* rightshift */ |
| 1678 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1679 | 16, /* bitsize */ |
| 1680 | TRUE, /* pc_relative */ |
| 1681 | 0, /* bitpos */ |
| 1682 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1683 | bfd_elf_generic_reloc, /* special_function */ |
| 1684 | "R_PPC_REL16", /* name */ |
| 1685 | FALSE, /* partial_inplace */ |
| 1686 | 0, /* src_mask */ |
| 1687 | 0xffff, /* dst_mask */ |
| 1688 | TRUE), /* pcrel_offset */ |
| 1689 | |
| 1690 | /* A 16 bit relative relocation without overflow. */ |
| 1691 | HOWTO (R_PPC_REL16_LO, /* type */ |
| 1692 | 0, /* rightshift */ |
| 1693 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1694 | 16, /* bitsize */ |
| 1695 | TRUE, /* pc_relative */ |
| 1696 | 0, /* bitpos */ |
| 1697 | complain_overflow_dont,/* complain_on_overflow */ |
| 1698 | bfd_elf_generic_reloc, /* special_function */ |
| 1699 | "R_PPC_REL16_LO", /* name */ |
| 1700 | FALSE, /* partial_inplace */ |
| 1701 | 0, /* src_mask */ |
| 1702 | 0xffff, /* dst_mask */ |
| 1703 | TRUE), /* pcrel_offset */ |
| 1704 | |
| 1705 | /* The high order 16 bits of a relative address. */ |
| 1706 | HOWTO (R_PPC_REL16_HI, /* type */ |
| 1707 | 16, /* rightshift */ |
| 1708 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1709 | 16, /* bitsize */ |
| 1710 | TRUE, /* pc_relative */ |
| 1711 | 0, /* bitpos */ |
| 1712 | complain_overflow_dont, /* complain_on_overflow */ |
| 1713 | bfd_elf_generic_reloc, /* special_function */ |
| 1714 | "R_PPC_REL16_HI", /* name */ |
| 1715 | FALSE, /* partial_inplace */ |
| 1716 | 0, /* src_mask */ |
| 1717 | 0xffff, /* dst_mask */ |
| 1718 | TRUE), /* pcrel_offset */ |
| 1719 | |
| 1720 | /* The high order 16 bits of a relative address, plus 1 if the contents of |
| 1721 | the low 16 bits, treated as a signed number, is negative. */ |
| 1722 | HOWTO (R_PPC_REL16_HA, /* type */ |
| 1723 | 16, /* rightshift */ |
| 1724 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1725 | 16, /* bitsize */ |
| 1726 | TRUE, /* pc_relative */ |
| 1727 | 0, /* bitpos */ |
| 1728 | complain_overflow_dont, /* complain_on_overflow */ |
| 1729 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1730 | "R_PPC_REL16_HA", /* name */ |
| 1731 | FALSE, /* partial_inplace */ |
| 1732 | 0, /* src_mask */ |
| 1733 | 0xffff, /* dst_mask */ |
| 1734 | TRUE), /* pcrel_offset */ |
| 1735 | |
| 1736 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1737 | HOWTO (R_PPC_GNU_VTINHERIT, /* type */ |
| 1738 | 0, /* rightshift */ |
| 1739 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1740 | 0, /* bitsize */ |
| 1741 | FALSE, /* pc_relative */ |
| 1742 | 0, /* bitpos */ |
| 1743 | complain_overflow_dont, /* complain_on_overflow */ |
| 1744 | NULL, /* special_function */ |
| 1745 | "R_PPC_GNU_VTINHERIT", /* name */ |
| 1746 | FALSE, /* partial_inplace */ |
| 1747 | 0, /* src_mask */ |
| 1748 | 0, /* dst_mask */ |
| 1749 | FALSE), /* pcrel_offset */ |
| 1750 | |
| 1751 | /* GNU extension to record C++ vtable member usage. */ |
| 1752 | HOWTO (R_PPC_GNU_VTENTRY, /* type */ |
| 1753 | 0, /* rightshift */ |
| 1754 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1755 | 0, /* bitsize */ |
| 1756 | FALSE, /* pc_relative */ |
| 1757 | 0, /* bitpos */ |
| 1758 | complain_overflow_dont, /* complain_on_overflow */ |
| 1759 | NULL, /* special_function */ |
| 1760 | "R_PPC_GNU_VTENTRY", /* name */ |
| 1761 | FALSE, /* partial_inplace */ |
| 1762 | 0, /* src_mask */ |
| 1763 | 0, /* dst_mask */ |
| 1764 | FALSE), /* pcrel_offset */ |
| 1765 | |
| 1766 | /* Phony reloc to handle AIX style TOC entries. */ |
| 1767 | HOWTO (R_PPC_TOC16, /* type */ |
| 1768 | 0, /* rightshift */ |
| 1769 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1770 | 16, /* bitsize */ |
| 1771 | FALSE, /* pc_relative */ |
| 1772 | 0, /* bitpos */ |
| 1773 | complain_overflow_signed, /* complain_on_overflow */ |
| 1774 | bfd_elf_generic_reloc, /* special_function */ |
| 1775 | "R_PPC_TOC16", /* name */ |
| 1776 | FALSE, /* partial_inplace */ |
| 1777 | 0, /* src_mask */ |
| 1778 | 0xffff, /* dst_mask */ |
| 1779 | FALSE), /* pcrel_offset */ |
| 1780 | }; |
| 1781 | |
| 1782 | /* External 32-bit PPC structure for PRPSINFO. This structure is |
| 1783 | ABI-defined, thus we choose to use char arrays here in order to |
| 1784 | avoid dealing with different types in different architectures. |
| 1785 | |
| 1786 | The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while |
| 1787 | most non-PPC architectures use `short int'. |
| 1788 | |
| 1789 | This structure will ultimately be written in the corefile's note |
| 1790 | section, as the PRPSINFO. */ |
| 1791 | |
| 1792 | struct elf_external_ppc_linux_prpsinfo32 |
| 1793 | { |
| 1794 | char pr_state; /* Numeric process state. */ |
| 1795 | char pr_sname; /* Char for pr_state. */ |
| 1796 | char pr_zomb; /* Zombie. */ |
| 1797 | char pr_nice; /* Nice val. */ |
| 1798 | char pr_flag[4]; /* Flags. */ |
| 1799 | char pr_uid[4]; |
| 1800 | char pr_gid[4]; |
| 1801 | char pr_pid[4]; |
| 1802 | char pr_ppid[4]; |
| 1803 | char pr_pgrp[4]; |
| 1804 | char pr_sid[4]; |
| 1805 | char pr_fname[16]; /* Filename of executable. */ |
| 1806 | char pr_psargs[80]; /* Initial part of arg list. */ |
| 1807 | }; |
| 1808 | |
| 1809 | /* Helper macro to swap (properly handling endianess) things from the |
| 1810 | `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32' |
| 1811 | structure. |
| 1812 | |
| 1813 | Note that FROM should be a pointer, and TO should be the explicit type. */ |
| 1814 | |
| 1815 | #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \ |
| 1816 | do \ |
| 1817 | { \ |
| 1818 | H_PUT_8 (abfd, from->pr_state, &to.pr_state); \ |
| 1819 | H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \ |
| 1820 | H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \ |
| 1821 | H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \ |
| 1822 | H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \ |
| 1823 | H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \ |
| 1824 | H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \ |
| 1825 | H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \ |
| 1826 | H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \ |
| 1827 | H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \ |
| 1828 | H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \ |
| 1829 | strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \ |
| 1830 | strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \ |
| 1831 | } while (0) |
| 1832 | |
| 1833 | \f |
| 1834 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 1835 | |
| 1836 | static void |
| 1837 | ppc_elf_howto_init (void) |
| 1838 | { |
| 1839 | unsigned int i, type; |
| 1840 | |
| 1841 | for (i = 0; |
| 1842 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 1843 | i++) |
| 1844 | { |
| 1845 | type = ppc_elf_howto_raw[i].type; |
| 1846 | if (type >= (sizeof (ppc_elf_howto_table) |
| 1847 | / sizeof (ppc_elf_howto_table[0]))) |
| 1848 | abort (); |
| 1849 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 1850 | } |
| 1851 | } |
| 1852 | |
| 1853 | static reloc_howto_type * |
| 1854 | ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1855 | bfd_reloc_code_real_type code) |
| 1856 | { |
| 1857 | enum elf_ppc_reloc_type r; |
| 1858 | |
| 1859 | /* Initialize howto table if not already done. */ |
| 1860 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1861 | ppc_elf_howto_init (); |
| 1862 | |
| 1863 | switch (code) |
| 1864 | { |
| 1865 | default: |
| 1866 | return NULL; |
| 1867 | |
| 1868 | case BFD_RELOC_NONE: r = R_PPC_NONE; break; |
| 1869 | case BFD_RELOC_32: r = R_PPC_ADDR32; break; |
| 1870 | case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; |
| 1871 | case BFD_RELOC_PPC64_ADDR16_DS: |
| 1872 | case BFD_RELOC_16: r = R_PPC_ADDR16; break; |
| 1873 | case BFD_RELOC_PPC64_ADDR16_LO_DS: |
| 1874 | case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; |
| 1875 | case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; |
| 1876 | case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; |
| 1877 | case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; |
| 1878 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; |
| 1879 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; |
| 1880 | case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; |
| 1881 | case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; |
| 1882 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; |
| 1883 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; |
| 1884 | case BFD_RELOC_PPC64_GOT16_DS: |
| 1885 | case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; |
| 1886 | case BFD_RELOC_PPC64_GOT16_LO_DS: |
| 1887 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; |
| 1888 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; |
| 1889 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; |
| 1890 | case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; |
| 1891 | case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; |
| 1892 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; |
| 1893 | case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; |
| 1894 | case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; |
| 1895 | case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; |
| 1896 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; |
| 1897 | case BFD_RELOC_PPC64_PLT16_LO_DS: |
| 1898 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; |
| 1899 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; |
| 1900 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; |
| 1901 | case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; |
| 1902 | case BFD_RELOC_PPC64_SECTOFF_DS: |
| 1903 | case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; |
| 1904 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: |
| 1905 | case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; |
| 1906 | case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; |
| 1907 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; |
| 1908 | case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; |
| 1909 | case BFD_RELOC_PPC64_TOC16_DS: |
| 1910 | case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; |
| 1911 | case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; |
| 1912 | case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; |
| 1913 | case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; |
| 1914 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; |
| 1915 | case BFD_RELOC_PPC64_TPREL16_DS: |
| 1916 | case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; |
| 1917 | case BFD_RELOC_PPC64_TPREL16_LO_DS: |
| 1918 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; |
| 1919 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; |
| 1920 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; |
| 1921 | case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; |
| 1922 | case BFD_RELOC_PPC64_DTPREL16_DS: |
| 1923 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; |
| 1924 | case BFD_RELOC_PPC64_DTPREL16_LO_DS: |
| 1925 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; |
| 1926 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; |
| 1927 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; |
| 1928 | case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; |
| 1929 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; |
| 1930 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; |
| 1931 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; |
| 1932 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; |
| 1933 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; |
| 1934 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; |
| 1935 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; |
| 1936 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; |
| 1937 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; |
| 1938 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; |
| 1939 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; |
| 1940 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; |
| 1941 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; |
| 1942 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; |
| 1943 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; |
| 1944 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; |
| 1945 | case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; |
| 1946 | case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; |
| 1947 | case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; |
| 1948 | case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; |
| 1949 | case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; |
| 1950 | case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; |
| 1951 | case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; |
| 1952 | case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; |
| 1953 | case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; |
| 1954 | case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; |
| 1955 | case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; |
| 1956 | case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; |
| 1957 | case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; |
| 1958 | case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; |
| 1959 | case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; |
| 1960 | case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; |
| 1961 | case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; |
| 1962 | case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; |
| 1963 | case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; |
| 1964 | case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; |
| 1965 | case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; |
| 1966 | case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; |
| 1967 | case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; |
| 1968 | case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; |
| 1969 | case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; |
| 1970 | case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; |
| 1971 | case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; |
| 1972 | case BFD_RELOC_PPC_VLE_SDAREL_LO16A: |
| 1973 | r = R_PPC_VLE_SDAREL_LO16A; |
| 1974 | break; |
| 1975 | case BFD_RELOC_PPC_VLE_SDAREL_LO16D: |
| 1976 | r = R_PPC_VLE_SDAREL_LO16D; |
| 1977 | break; |
| 1978 | case BFD_RELOC_PPC_VLE_SDAREL_HI16A: |
| 1979 | r = R_PPC_VLE_SDAREL_HI16A; |
| 1980 | break; |
| 1981 | case BFD_RELOC_PPC_VLE_SDAREL_HI16D: |
| 1982 | r = R_PPC_VLE_SDAREL_HI16D; |
| 1983 | break; |
| 1984 | case BFD_RELOC_PPC_VLE_SDAREL_HA16A: |
| 1985 | r = R_PPC_VLE_SDAREL_HA16A; |
| 1986 | break; |
| 1987 | case BFD_RELOC_PPC_VLE_SDAREL_HA16D: |
| 1988 | r = R_PPC_VLE_SDAREL_HA16D; |
| 1989 | break; |
| 1990 | case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; |
| 1991 | case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; |
| 1992 | case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; |
| 1993 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; |
| 1994 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; |
| 1995 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; |
| 1996 | } |
| 1997 | |
| 1998 | return ppc_elf_howto_table[r]; |
| 1999 | }; |
| 2000 | |
| 2001 | static reloc_howto_type * |
| 2002 | ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 2003 | const char *r_name) |
| 2004 | { |
| 2005 | unsigned int i; |
| 2006 | |
| 2007 | for (i = 0; |
| 2008 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 2009 | i++) |
| 2010 | if (ppc_elf_howto_raw[i].name != NULL |
| 2011 | && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) |
| 2012 | return &ppc_elf_howto_raw[i]; |
| 2013 | |
| 2014 | return NULL; |
| 2015 | } |
| 2016 | |
| 2017 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 2018 | |
| 2019 | static void |
| 2020 | ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 2021 | arelent *cache_ptr, |
| 2022 | Elf_Internal_Rela *dst) |
| 2023 | { |
| 2024 | /* Initialize howto table if not already done. */ |
| 2025 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 2026 | ppc_elf_howto_init (); |
| 2027 | |
| 2028 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 2029 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 2030 | |
| 2031 | /* Just because the above assert didn't trigger doesn't mean that |
| 2032 | ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ |
| 2033 | if (!cache_ptr->howto) |
| 2034 | { |
| 2035 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
| 2036 | abfd, ELF32_R_TYPE (dst->r_info)); |
| 2037 | bfd_set_error (bfd_error_bad_value); |
| 2038 | |
| 2039 | cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; |
| 2040 | } |
| 2041 | } |
| 2042 | |
| 2043 | /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ |
| 2044 | |
| 2045 | static bfd_reloc_status_type |
| 2046 | ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 2047 | arelent *reloc_entry, |
| 2048 | asymbol *symbol, |
| 2049 | void *data ATTRIBUTE_UNUSED, |
| 2050 | asection *input_section, |
| 2051 | bfd *output_bfd, |
| 2052 | char **error_message ATTRIBUTE_UNUSED) |
| 2053 | { |
| 2054 | bfd_vma relocation; |
| 2055 | |
| 2056 | if (output_bfd != NULL) |
| 2057 | { |
| 2058 | reloc_entry->address += input_section->output_offset; |
| 2059 | return bfd_reloc_ok; |
| 2060 | } |
| 2061 | |
| 2062 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 2063 | return bfd_reloc_outofrange; |
| 2064 | |
| 2065 | if (bfd_is_com_section (symbol->section)) |
| 2066 | relocation = 0; |
| 2067 | else |
| 2068 | relocation = symbol->value; |
| 2069 | |
| 2070 | relocation += symbol->section->output_section->vma; |
| 2071 | relocation += symbol->section->output_offset; |
| 2072 | relocation += reloc_entry->addend; |
| 2073 | if (reloc_entry->howto->pc_relative) |
| 2074 | relocation -= reloc_entry->address; |
| 2075 | |
| 2076 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 2077 | |
| 2078 | return bfd_reloc_continue; |
| 2079 | } |
| 2080 | |
| 2081 | static bfd_reloc_status_type |
| 2082 | ppc_elf_unhandled_reloc (bfd *abfd, |
| 2083 | arelent *reloc_entry, |
| 2084 | asymbol *symbol, |
| 2085 | void *data, |
| 2086 | asection *input_section, |
| 2087 | bfd *output_bfd, |
| 2088 | char **error_message) |
| 2089 | { |
| 2090 | /* If this is a relocatable link (output_bfd test tells us), just |
| 2091 | call the generic function. Any adjustment will be done at final |
| 2092 | link time. */ |
| 2093 | if (output_bfd != NULL) |
| 2094 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 2095 | input_section, output_bfd, error_message); |
| 2096 | |
| 2097 | if (error_message != NULL) |
| 2098 | { |
| 2099 | static char buf[60]; |
| 2100 | sprintf (buf, _("generic linker can't handle %s"), |
| 2101 | reloc_entry->howto->name); |
| 2102 | *error_message = buf; |
| 2103 | } |
| 2104 | return bfd_reloc_dangerous; |
| 2105 | } |
| 2106 | \f |
| 2107 | /* Sections created by the linker. */ |
| 2108 | |
| 2109 | typedef struct elf_linker_section |
| 2110 | { |
| 2111 | /* Pointer to the bfd section. */ |
| 2112 | asection *section; |
| 2113 | /* Section name. */ |
| 2114 | const char *name; |
| 2115 | /* Associated bss section name. */ |
| 2116 | const char *bss_name; |
| 2117 | /* Associated symbol name. */ |
| 2118 | const char *sym_name; |
| 2119 | /* Associated symbol. */ |
| 2120 | struct elf_link_hash_entry *sym; |
| 2121 | } elf_linker_section_t; |
| 2122 | |
| 2123 | /* Linked list of allocated pointer entries. This hangs off of the |
| 2124 | symbol lists, and provides allows us to return different pointers, |
| 2125 | based on different addend's. */ |
| 2126 | |
| 2127 | typedef struct elf_linker_section_pointers |
| 2128 | { |
| 2129 | /* next allocated pointer for this symbol */ |
| 2130 | struct elf_linker_section_pointers *next; |
| 2131 | /* offset of pointer from beginning of section */ |
| 2132 | bfd_vma offset; |
| 2133 | /* addend used */ |
| 2134 | bfd_vma addend; |
| 2135 | /* which linker section this is */ |
| 2136 | elf_linker_section_t *lsect; |
| 2137 | } elf_linker_section_pointers_t; |
| 2138 | |
| 2139 | struct ppc_elf_obj_tdata |
| 2140 | { |
| 2141 | struct elf_obj_tdata elf; |
| 2142 | |
| 2143 | /* A mapping from local symbols to offsets into the various linker |
| 2144 | sections added. This is index by the symbol index. */ |
| 2145 | elf_linker_section_pointers_t **linker_section_pointers; |
| 2146 | |
| 2147 | /* Flags used to auto-detect plt type. */ |
| 2148 | unsigned int makes_plt_call : 1; |
| 2149 | unsigned int has_rel16 : 1; |
| 2150 | }; |
| 2151 | |
| 2152 | #define ppc_elf_tdata(bfd) \ |
| 2153 | ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) |
| 2154 | |
| 2155 | #define elf_local_ptr_offsets(bfd) \ |
| 2156 | (ppc_elf_tdata (bfd)->linker_section_pointers) |
| 2157 | |
| 2158 | #define is_ppc_elf(bfd) \ |
| 2159 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 2160 | && elf_object_id (bfd) == PPC32_ELF_DATA) |
| 2161 | |
| 2162 | /* Override the generic function because we store some extras. */ |
| 2163 | |
| 2164 | static bfd_boolean |
| 2165 | ppc_elf_mkobject (bfd *abfd) |
| 2166 | { |
| 2167 | return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), |
| 2168 | PPC32_ELF_DATA); |
| 2169 | } |
| 2170 | |
| 2171 | /* Fix bad default arch selected for a 32 bit input bfd when the |
| 2172 | default is 64 bit. */ |
| 2173 | |
| 2174 | static bfd_boolean |
| 2175 | ppc_elf_object_p (bfd *abfd) |
| 2176 | { |
| 2177 | if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) |
| 2178 | { |
| 2179 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 2180 | |
| 2181 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) |
| 2182 | { |
| 2183 | /* Relies on arch after 64 bit default being 32 bit default. */ |
| 2184 | abfd->arch_info = abfd->arch_info->next; |
| 2185 | BFD_ASSERT (abfd->arch_info->bits_per_word == 32); |
| 2186 | } |
| 2187 | } |
| 2188 | return TRUE; |
| 2189 | } |
| 2190 | |
| 2191 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 2192 | |
| 2193 | static bfd_boolean |
| 2194 | ppc_elf_set_private_flags (bfd *abfd, flagword flags) |
| 2195 | { |
| 2196 | BFD_ASSERT (!elf_flags_init (abfd) |
| 2197 | || elf_elfheader (abfd)->e_flags == flags); |
| 2198 | |
| 2199 | elf_elfheader (abfd)->e_flags = flags; |
| 2200 | elf_flags_init (abfd) = TRUE; |
| 2201 | return TRUE; |
| 2202 | } |
| 2203 | |
| 2204 | /* Support for core dump NOTE sections. */ |
| 2205 | |
| 2206 | static bfd_boolean |
| 2207 | ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 2208 | { |
| 2209 | int offset; |
| 2210 | unsigned int size; |
| 2211 | |
| 2212 | switch (note->descsz) |
| 2213 | { |
| 2214 | default: |
| 2215 | return FALSE; |
| 2216 | |
| 2217 | case 268: /* Linux/PPC. */ |
| 2218 | /* pr_cursig */ |
| 2219 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 2220 | |
| 2221 | /* pr_pid */ |
| 2222 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 2223 | |
| 2224 | /* pr_reg */ |
| 2225 | offset = 72; |
| 2226 | size = 192; |
| 2227 | |
| 2228 | break; |
| 2229 | } |
| 2230 | |
| 2231 | /* Make a ".reg/999" section. */ |
| 2232 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 2233 | size, note->descpos + offset); |
| 2234 | } |
| 2235 | |
| 2236 | static bfd_boolean |
| 2237 | ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 2238 | { |
| 2239 | switch (note->descsz) |
| 2240 | { |
| 2241 | default: |
| 2242 | return FALSE; |
| 2243 | |
| 2244 | case 128: /* Linux/PPC elf_prpsinfo. */ |
| 2245 | elf_tdata (abfd)->core->pid |
| 2246 | = bfd_get_32 (abfd, note->descdata + 16); |
| 2247 | elf_tdata (abfd)->core->program |
| 2248 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 2249 | elf_tdata (abfd)->core->command |
| 2250 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 2251 | } |
| 2252 | |
| 2253 | /* Note that for some reason, a spurious space is tacked |
| 2254 | onto the end of the args in some (at least one anyway) |
| 2255 | implementations, so strip it off if it exists. */ |
| 2256 | |
| 2257 | { |
| 2258 | char *command = elf_tdata (abfd)->core->command; |
| 2259 | int n = strlen (command); |
| 2260 | |
| 2261 | if (0 < n && command[n - 1] == ' ') |
| 2262 | command[n - 1] = '\0'; |
| 2263 | } |
| 2264 | |
| 2265 | return TRUE; |
| 2266 | } |
| 2267 | |
| 2268 | char * |
| 2269 | elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz, |
| 2270 | const struct elf_internal_linux_prpsinfo *prpsinfo) |
| 2271 | { |
| 2272 | struct elf_external_ppc_linux_prpsinfo32 data; |
| 2273 | |
| 2274 | memset (&data, 0, sizeof (data)); |
| 2275 | PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data); |
| 2276 | |
| 2277 | return elfcore_write_note (abfd, buf, bufsiz, |
| 2278 | "CORE", NT_PRPSINFO, &data, sizeof (data)); |
| 2279 | } |
| 2280 | |
| 2281 | static char * |
| 2282 | ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) |
| 2283 | { |
| 2284 | switch (note_type) |
| 2285 | { |
| 2286 | default: |
| 2287 | return NULL; |
| 2288 | |
| 2289 | case NT_PRPSINFO: |
| 2290 | { |
| 2291 | char data[128]; |
| 2292 | va_list ap; |
| 2293 | |
| 2294 | va_start (ap, note_type); |
| 2295 | memset (data, 0, sizeof (data)); |
| 2296 | strncpy (data + 32, va_arg (ap, const char *), 16); |
| 2297 | strncpy (data + 48, va_arg (ap, const char *), 80); |
| 2298 | va_end (ap); |
| 2299 | return elfcore_write_note (abfd, buf, bufsiz, |
| 2300 | "CORE", note_type, data, sizeof (data)); |
| 2301 | } |
| 2302 | |
| 2303 | case NT_PRSTATUS: |
| 2304 | { |
| 2305 | char data[268]; |
| 2306 | va_list ap; |
| 2307 | long pid; |
| 2308 | int cursig; |
| 2309 | const void *greg; |
| 2310 | |
| 2311 | va_start (ap, note_type); |
| 2312 | memset (data, 0, 72); |
| 2313 | pid = va_arg (ap, long); |
| 2314 | bfd_put_32 (abfd, pid, data + 24); |
| 2315 | cursig = va_arg (ap, int); |
| 2316 | bfd_put_16 (abfd, cursig, data + 12); |
| 2317 | greg = va_arg (ap, const void *); |
| 2318 | memcpy (data + 72, greg, 192); |
| 2319 | memset (data + 264, 0, 4); |
| 2320 | va_end (ap); |
| 2321 | return elfcore_write_note (abfd, buf, bufsiz, |
| 2322 | "CORE", note_type, data, sizeof (data)); |
| 2323 | } |
| 2324 | } |
| 2325 | } |
| 2326 | |
| 2327 | static flagword |
| 2328 | ppc_elf_lookup_section_flags (char *flag_name) |
| 2329 | { |
| 2330 | |
| 2331 | if (!strcmp (flag_name, "SHF_PPC_VLE")) |
| 2332 | return SHF_PPC_VLE; |
| 2333 | |
| 2334 | return 0; |
| 2335 | } |
| 2336 | |
| 2337 | /* Add the VLE flag if required. */ |
| 2338 | |
| 2339 | bfd_boolean |
| 2340 | ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr) |
| 2341 | { |
| 2342 | if (bfd_get_mach (abfd) == bfd_mach_ppc_vle |
| 2343 | && (shdr->sh_flags & SHF_EXECINSTR) != 0) |
| 2344 | shdr->sh_flags |= SHF_PPC_VLE; |
| 2345 | |
| 2346 | return TRUE; |
| 2347 | } |
| 2348 | |
| 2349 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 2350 | or (bfd_vma) -1 if it should not be included. */ |
| 2351 | |
| 2352 | static bfd_vma |
| 2353 | ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, |
| 2354 | const asection *plt ATTRIBUTE_UNUSED, |
| 2355 | const arelent *rel) |
| 2356 | { |
| 2357 | return rel->address; |
| 2358 | } |
| 2359 | |
| 2360 | /* Handle a PowerPC specific section when reading an object file. This |
| 2361 | is called when bfd_section_from_shdr finds a section with an unknown |
| 2362 | type. */ |
| 2363 | |
| 2364 | static bfd_boolean |
| 2365 | ppc_elf_section_from_shdr (bfd *abfd, |
| 2366 | Elf_Internal_Shdr *hdr, |
| 2367 | const char *name, |
| 2368 | int shindex) |
| 2369 | { |
| 2370 | asection *newsect; |
| 2371 | flagword flags; |
| 2372 | |
| 2373 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 2374 | return FALSE; |
| 2375 | |
| 2376 | newsect = hdr->bfd_section; |
| 2377 | flags = bfd_get_section_flags (abfd, newsect); |
| 2378 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 2379 | flags |= SEC_EXCLUDE; |
| 2380 | |
| 2381 | if (hdr->sh_type == SHT_ORDERED) |
| 2382 | flags |= SEC_SORT_ENTRIES; |
| 2383 | |
| 2384 | bfd_set_section_flags (abfd, newsect, flags); |
| 2385 | return TRUE; |
| 2386 | } |
| 2387 | |
| 2388 | /* Set up any other section flags and such that may be necessary. */ |
| 2389 | |
| 2390 | static bfd_boolean |
| 2391 | ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 2392 | Elf_Internal_Shdr *shdr, |
| 2393 | asection *asect) |
| 2394 | { |
| 2395 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 2396 | shdr->sh_type = SHT_ORDERED; |
| 2397 | |
| 2398 | return TRUE; |
| 2399 | } |
| 2400 | |
| 2401 | /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we |
| 2402 | need to bump up the number of section headers. */ |
| 2403 | |
| 2404 | static int |
| 2405 | ppc_elf_additional_program_headers (bfd *abfd, |
| 2406 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 2407 | { |
| 2408 | asection *s; |
| 2409 | int ret = 0; |
| 2410 | |
| 2411 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 2412 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 2413 | ++ret; |
| 2414 | |
| 2415 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 2416 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 2417 | ++ret; |
| 2418 | |
| 2419 | return ret; |
| 2420 | } |
| 2421 | |
| 2422 | /* Modify the segment map for VLE executables. */ |
| 2423 | |
| 2424 | bfd_boolean |
| 2425 | ppc_elf_modify_segment_map (bfd *abfd, |
| 2426 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 2427 | { |
| 2428 | struct elf_segment_map *m, *n; |
| 2429 | bfd_size_type amt; |
| 2430 | unsigned int j, k; |
| 2431 | bfd_boolean sect0_vle, sectj_vle; |
| 2432 | |
| 2433 | /* At this point in the link, output sections have already been sorted by |
| 2434 | LMA and assigned to segments. All that is left to do is to ensure |
| 2435 | there is no mixing of VLE & non-VLE sections in a text segment. |
| 2436 | If we find that case, we split the segment. |
| 2437 | We maintain the original output section order. */ |
| 2438 | |
| 2439 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) |
| 2440 | { |
| 2441 | if (m->count == 0) |
| 2442 | continue; |
| 2443 | |
| 2444 | sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0; |
| 2445 | for (j = 1; j < m->count; ++j) |
| 2446 | { |
| 2447 | sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0; |
| 2448 | |
| 2449 | if (sectj_vle != sect0_vle) |
| 2450 | break; |
| 2451 | } |
| 2452 | if (j >= m->count) |
| 2453 | continue; |
| 2454 | |
| 2455 | /* sections 0..j-1 stay in this (current) segment, |
| 2456 | the remainder are put in a new segment. |
| 2457 | The scan resumes with the new segment. */ |
| 2458 | |
| 2459 | /* Fix the new segment. */ |
| 2460 | amt = sizeof (struct elf_segment_map); |
| 2461 | amt += (m->count - j - 1) * sizeof (asection *); |
| 2462 | n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); |
| 2463 | if (n == NULL) |
| 2464 | return FALSE; |
| 2465 | |
| 2466 | n->p_type = PT_LOAD; |
| 2467 | n->p_flags = PF_X | PF_R; |
| 2468 | if (sectj_vle) |
| 2469 | n->p_flags |= PF_PPC_VLE; |
| 2470 | n->count = m->count - j; |
| 2471 | for (k = 0; k < n->count; ++k) |
| 2472 | { |
| 2473 | n->sections[k] = m->sections[j+k]; |
| 2474 | m->sections[j+k] = NULL; |
| 2475 | } |
| 2476 | n->next = m->next; |
| 2477 | m->next = n; |
| 2478 | |
| 2479 | /* Fix the current segment */ |
| 2480 | m->count = j; |
| 2481 | } |
| 2482 | |
| 2483 | return TRUE; |
| 2484 | } |
| 2485 | |
| 2486 | /* Add extra PPC sections -- Note, for now, make .sbss2 and |
| 2487 | .PPC.EMB.sbss0 a normal section, and not a bss section so |
| 2488 | that the linker doesn't crater when trying to make more than |
| 2489 | 2 sections. */ |
| 2490 | |
| 2491 | static const struct bfd_elf_special_section ppc_elf_special_sections[] = |
| 2492 | { |
| 2493 | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, |
| 2494 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 2495 | { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, |
| 2496 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 2497 | { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, |
| 2498 | { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, |
| 2499 | { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 }, |
| 2500 | { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 2501 | { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| 2502 | { NULL, 0, 0, 0, 0 } |
| 2503 | }; |
| 2504 | |
| 2505 | /* This is what we want for new plt/got. */ |
| 2506 | static struct bfd_elf_special_section ppc_alt_plt = |
| 2507 | { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; |
| 2508 | |
| 2509 | static const struct bfd_elf_special_section * |
| 2510 | ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 2511 | { |
| 2512 | const struct bfd_elf_special_section *ssect; |
| 2513 | |
| 2514 | /* See if this is one of the special sections. */ |
| 2515 | if (sec->name == NULL) |
| 2516 | return NULL; |
| 2517 | |
| 2518 | ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, |
| 2519 | sec->use_rela_p); |
| 2520 | if (ssect != NULL) |
| 2521 | { |
| 2522 | if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) |
| 2523 | ssect = &ppc_alt_plt; |
| 2524 | return ssect; |
| 2525 | } |
| 2526 | |
| 2527 | return _bfd_elf_get_sec_type_attr (abfd, sec); |
| 2528 | } |
| 2529 | \f |
| 2530 | /* Very simple linked list structure for recording apuinfo values. */ |
| 2531 | typedef struct apuinfo_list |
| 2532 | { |
| 2533 | struct apuinfo_list *next; |
| 2534 | unsigned long value; |
| 2535 | } |
| 2536 | apuinfo_list; |
| 2537 | |
| 2538 | static apuinfo_list *head; |
| 2539 | static bfd_boolean apuinfo_set; |
| 2540 | |
| 2541 | static void |
| 2542 | apuinfo_list_init (void) |
| 2543 | { |
| 2544 | head = NULL; |
| 2545 | apuinfo_set = FALSE; |
| 2546 | } |
| 2547 | |
| 2548 | static void |
| 2549 | apuinfo_list_add (unsigned long value) |
| 2550 | { |
| 2551 | apuinfo_list *entry = head; |
| 2552 | |
| 2553 | while (entry != NULL) |
| 2554 | { |
| 2555 | if (entry->value == value) |
| 2556 | return; |
| 2557 | entry = entry->next; |
| 2558 | } |
| 2559 | |
| 2560 | entry = bfd_malloc (sizeof (* entry)); |
| 2561 | if (entry == NULL) |
| 2562 | return; |
| 2563 | |
| 2564 | entry->value = value; |
| 2565 | entry->next = head; |
| 2566 | head = entry; |
| 2567 | } |
| 2568 | |
| 2569 | static unsigned |
| 2570 | apuinfo_list_length (void) |
| 2571 | { |
| 2572 | apuinfo_list *entry; |
| 2573 | unsigned long count; |
| 2574 | |
| 2575 | for (entry = head, count = 0; |
| 2576 | entry; |
| 2577 | entry = entry->next) |
| 2578 | ++ count; |
| 2579 | |
| 2580 | return count; |
| 2581 | } |
| 2582 | |
| 2583 | static inline unsigned long |
| 2584 | apuinfo_list_element (unsigned long number) |
| 2585 | { |
| 2586 | apuinfo_list * entry; |
| 2587 | |
| 2588 | for (entry = head; |
| 2589 | entry && number --; |
| 2590 | entry = entry->next) |
| 2591 | ; |
| 2592 | |
| 2593 | return entry ? entry->value : 0; |
| 2594 | } |
| 2595 | |
| 2596 | static void |
| 2597 | apuinfo_list_finish (void) |
| 2598 | { |
| 2599 | apuinfo_list *entry; |
| 2600 | |
| 2601 | for (entry = head; entry;) |
| 2602 | { |
| 2603 | apuinfo_list *next = entry->next; |
| 2604 | free (entry); |
| 2605 | entry = next; |
| 2606 | } |
| 2607 | |
| 2608 | head = NULL; |
| 2609 | } |
| 2610 | |
| 2611 | #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" |
| 2612 | #define APUINFO_LABEL "APUinfo" |
| 2613 | |
| 2614 | /* Scan the input BFDs and create a linked list of |
| 2615 | the APUinfo values that will need to be emitted. */ |
| 2616 | |
| 2617 | static void |
| 2618 | ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) |
| 2619 | { |
| 2620 | bfd *ibfd; |
| 2621 | asection *asec; |
| 2622 | char *buffer = NULL; |
| 2623 | bfd_size_type largest_input_size = 0; |
| 2624 | unsigned i; |
| 2625 | unsigned long length; |
| 2626 | const char *error_message = NULL; |
| 2627 | |
| 2628 | if (link_info == NULL) |
| 2629 | return; |
| 2630 | |
| 2631 | apuinfo_list_init (); |
| 2632 | |
| 2633 | /* Read in the input sections contents. */ |
| 2634 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 2635 | { |
| 2636 | unsigned long datum; |
| 2637 | |
| 2638 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 2639 | if (asec == NULL) |
| 2640 | continue; |
| 2641 | |
| 2642 | error_message = _("corrupt %s section in %B"); |
| 2643 | length = asec->size; |
| 2644 | if (length < 20) |
| 2645 | goto fail; |
| 2646 | |
| 2647 | apuinfo_set = TRUE; |
| 2648 | if (largest_input_size < asec->size) |
| 2649 | { |
| 2650 | if (buffer) |
| 2651 | free (buffer); |
| 2652 | largest_input_size = asec->size; |
| 2653 | buffer = bfd_malloc (largest_input_size); |
| 2654 | if (!buffer) |
| 2655 | return; |
| 2656 | } |
| 2657 | |
| 2658 | if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 |
| 2659 | || (bfd_bread (buffer, length, ibfd) != length)) |
| 2660 | { |
| 2661 | error_message = _("unable to read in %s section from %B"); |
| 2662 | goto fail; |
| 2663 | } |
| 2664 | |
| 2665 | /* Verify the contents of the header. Note - we have to |
| 2666 | extract the values this way in order to allow for a |
| 2667 | host whose endian-ness is different from the target. */ |
| 2668 | datum = bfd_get_32 (ibfd, buffer); |
| 2669 | if (datum != sizeof APUINFO_LABEL) |
| 2670 | goto fail; |
| 2671 | |
| 2672 | datum = bfd_get_32 (ibfd, buffer + 8); |
| 2673 | if (datum != 0x2) |
| 2674 | goto fail; |
| 2675 | |
| 2676 | if (strcmp (buffer + 12, APUINFO_LABEL) != 0) |
| 2677 | goto fail; |
| 2678 | |
| 2679 | /* Get the number of bytes used for apuinfo entries. */ |
| 2680 | datum = bfd_get_32 (ibfd, buffer + 4); |
| 2681 | if (datum + 20 != length) |
| 2682 | goto fail; |
| 2683 | |
| 2684 | /* Scan the apuinfo section, building a list of apuinfo numbers. */ |
| 2685 | for (i = 0; i < datum; i += 4) |
| 2686 | apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); |
| 2687 | } |
| 2688 | |
| 2689 | error_message = NULL; |
| 2690 | |
| 2691 | if (apuinfo_set) |
| 2692 | { |
| 2693 | /* Compute the size of the output section. */ |
| 2694 | unsigned num_entries = apuinfo_list_length (); |
| 2695 | |
| 2696 | /* Set the output section size, if it exists. */ |
| 2697 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 2698 | |
| 2699 | if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) |
| 2700 | { |
| 2701 | ibfd = abfd; |
| 2702 | error_message = _("warning: unable to set size of %s section in %B"); |
| 2703 | } |
| 2704 | } |
| 2705 | |
| 2706 | fail: |
| 2707 | if (buffer) |
| 2708 | free (buffer); |
| 2709 | |
| 2710 | if (error_message) |
| 2711 | (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); |
| 2712 | } |
| 2713 | |
| 2714 | /* Prevent the output section from accumulating the input sections' |
| 2715 | contents. We have already stored this in our linked list structure. */ |
| 2716 | |
| 2717 | static bfd_boolean |
| 2718 | ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, |
| 2719 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
| 2720 | asection *asec, |
| 2721 | bfd_byte *contents ATTRIBUTE_UNUSED) |
| 2722 | { |
| 2723 | return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; |
| 2724 | } |
| 2725 | |
| 2726 | /* Finally we can generate the output section. */ |
| 2727 | |
| 2728 | static void |
| 2729 | ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 2730 | { |
| 2731 | bfd_byte *buffer; |
| 2732 | asection *asec; |
| 2733 | unsigned i; |
| 2734 | unsigned num_entries; |
| 2735 | bfd_size_type length; |
| 2736 | |
| 2737 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 2738 | if (asec == NULL) |
| 2739 | return; |
| 2740 | |
| 2741 | if (!apuinfo_set) |
| 2742 | return; |
| 2743 | |
| 2744 | length = asec->size; |
| 2745 | if (length < 20) |
| 2746 | return; |
| 2747 | |
| 2748 | buffer = bfd_malloc (length); |
| 2749 | if (buffer == NULL) |
| 2750 | { |
| 2751 | (*_bfd_error_handler) |
| 2752 | (_("failed to allocate space for new APUinfo section.")); |
| 2753 | return; |
| 2754 | } |
| 2755 | |
| 2756 | /* Create the apuinfo header. */ |
| 2757 | num_entries = apuinfo_list_length (); |
| 2758 | bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); |
| 2759 | bfd_put_32 (abfd, num_entries * 4, buffer + 4); |
| 2760 | bfd_put_32 (abfd, 0x2, buffer + 8); |
| 2761 | strcpy ((char *) buffer + 12, APUINFO_LABEL); |
| 2762 | |
| 2763 | length = 20; |
| 2764 | for (i = 0; i < num_entries; i++) |
| 2765 | { |
| 2766 | bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); |
| 2767 | length += 4; |
| 2768 | } |
| 2769 | |
| 2770 | if (length != asec->size) |
| 2771 | (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); |
| 2772 | |
| 2773 | if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) |
| 2774 | (*_bfd_error_handler) (_("failed to install new APUinfo section.")); |
| 2775 | |
| 2776 | free (buffer); |
| 2777 | |
| 2778 | apuinfo_list_finish (); |
| 2779 | } |
| 2780 | \f |
| 2781 | static bfd_boolean |
| 2782 | is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) |
| 2783 | { |
| 2784 | bfd_byte buf[GLINK_ENTRY_SIZE]; |
| 2785 | |
| 2786 | if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) |
| 2787 | return FALSE; |
| 2788 | |
| 2789 | return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 |
| 2790 | && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 |
| 2791 | && bfd_get_32 (abfd, buf + 8) == MTCTR_11 |
| 2792 | && bfd_get_32 (abfd, buf + 12) == BCTR); |
| 2793 | } |
| 2794 | |
| 2795 | static bfd_boolean |
| 2796 | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) |
| 2797 | { |
| 2798 | bfd_vma vma = *(bfd_vma *) ptr; |
| 2799 | return ((section->flags & SEC_ALLOC) != 0 |
| 2800 | && section->vma <= vma |
| 2801 | && vma < section->vma + section->size); |
| 2802 | } |
| 2803 | |
| 2804 | static long |
| 2805 | ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, |
| 2806 | long dynsymcount, asymbol **dynsyms, |
| 2807 | asymbol **ret) |
| 2808 | { |
| 2809 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| 2810 | asection *plt, *relplt, *dynamic, *glink; |
| 2811 | bfd_vma glink_vma = 0; |
| 2812 | bfd_vma resolv_vma = 0; |
| 2813 | bfd_vma stub_vma; |
| 2814 | asymbol *s; |
| 2815 | arelent *p; |
| 2816 | long count, i; |
| 2817 | size_t size; |
| 2818 | char *names; |
| 2819 | bfd_byte buf[4]; |
| 2820 | |
| 2821 | *ret = NULL; |
| 2822 | |
| 2823 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
| 2824 | return 0; |
| 2825 | |
| 2826 | if (dynsymcount <= 0) |
| 2827 | return 0; |
| 2828 | |
| 2829 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2830 | if (relplt == NULL) |
| 2831 | return 0; |
| 2832 | |
| 2833 | plt = bfd_get_section_by_name (abfd, ".plt"); |
| 2834 | if (plt == NULL) |
| 2835 | return 0; |
| 2836 | |
| 2837 | /* Call common code to handle old-style executable PLTs. */ |
| 2838 | if (elf_section_flags (plt) & SHF_EXECINSTR) |
| 2839 | return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, |
| 2840 | dynsymcount, dynsyms, ret); |
| 2841 | |
| 2842 | /* If this object was prelinked, the prelinker stored the address |
| 2843 | of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ |
| 2844 | dynamic = bfd_get_section_by_name (abfd, ".dynamic"); |
| 2845 | if (dynamic != NULL) |
| 2846 | { |
| 2847 | bfd_byte *dynbuf, *extdyn, *extdynend; |
| 2848 | size_t extdynsize; |
| 2849 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); |
| 2850 | |
| 2851 | if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) |
| 2852 | return -1; |
| 2853 | |
| 2854 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
| 2855 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
| 2856 | |
| 2857 | extdyn = dynbuf; |
| 2858 | extdynend = extdyn + dynamic->size; |
| 2859 | for (; extdyn < extdynend; extdyn += extdynsize) |
| 2860 | { |
| 2861 | Elf_Internal_Dyn dyn; |
| 2862 | (*swap_dyn_in) (abfd, extdyn, &dyn); |
| 2863 | |
| 2864 | if (dyn.d_tag == DT_NULL) |
| 2865 | break; |
| 2866 | |
| 2867 | if (dyn.d_tag == DT_PPC_GOT) |
| 2868 | { |
| 2869 | unsigned int g_o_t = dyn.d_un.d_val; |
| 2870 | asection *got = bfd_get_section_by_name (abfd, ".got"); |
| 2871 | if (got != NULL |
| 2872 | && bfd_get_section_contents (abfd, got, buf, |
| 2873 | g_o_t - got->vma + 4, 4)) |
| 2874 | glink_vma = bfd_get_32 (abfd, buf); |
| 2875 | break; |
| 2876 | } |
| 2877 | } |
| 2878 | free (dynbuf); |
| 2879 | } |
| 2880 | |
| 2881 | /* Otherwise we read the first plt entry. */ |
| 2882 | if (glink_vma == 0) |
| 2883 | { |
| 2884 | if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) |
| 2885 | glink_vma = bfd_get_32 (abfd, buf); |
| 2886 | } |
| 2887 | |
| 2888 | if (glink_vma == 0) |
| 2889 | return 0; |
| 2890 | |
| 2891 | /* The .glink section usually does not survive the final |
| 2892 | link; search for the section (usually .text) where the |
| 2893 | glink stubs now reside. */ |
| 2894 | glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); |
| 2895 | if (glink == NULL) |
| 2896 | return 0; |
| 2897 | |
| 2898 | /* Determine glink PLT resolver by reading the relative branch |
| 2899 | from the first glink stub. */ |
| 2900 | if (bfd_get_section_contents (abfd, glink, buf, |
| 2901 | glink_vma - glink->vma, 4)) |
| 2902 | { |
| 2903 | unsigned int insn = bfd_get_32 (abfd, buf); |
| 2904 | |
| 2905 | /* The first glink stub may either branch to the resolver ... */ |
| 2906 | insn ^= B; |
| 2907 | if ((insn & ~0x3fffffc) == 0) |
| 2908 | resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; |
| 2909 | |
| 2910 | /* ... or fall through a bunch of NOPs. */ |
| 2911 | else if ((insn ^ B ^ NOP) == 0) |
| 2912 | for (i = 4; |
| 2913 | bfd_get_section_contents (abfd, glink, buf, |
| 2914 | glink_vma - glink->vma + i, 4); |
| 2915 | i += 4) |
| 2916 | if (bfd_get_32 (abfd, buf) != NOP) |
| 2917 | { |
| 2918 | resolv_vma = glink_vma + i; |
| 2919 | break; |
| 2920 | } |
| 2921 | } |
| 2922 | |
| 2923 | count = relplt->size / sizeof (Elf32_External_Rela); |
| 2924 | stub_vma = glink_vma - (bfd_vma) count * 16; |
| 2925 | /* If the stubs are those for -shared/-pie then we might have |
| 2926 | multiple stubs for each plt entry. If that is the case then |
| 2927 | there is no way to associate stubs with their plt entries short |
| 2928 | of figuring out the GOT pointer value used in the stub. */ |
| 2929 | if (!is_nonpic_glink_stub (abfd, glink, |
| 2930 | glink_vma - GLINK_ENTRY_SIZE - glink->vma)) |
| 2931 | return 0; |
| 2932 | |
| 2933 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| 2934 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) |
| 2935 | return -1; |
| 2936 | |
| 2937 | size = count * sizeof (asymbol); |
| 2938 | p = relplt->relocation; |
| 2939 | for (i = 0; i < count; i++, p++) |
| 2940 | { |
| 2941 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); |
| 2942 | if (p->addend != 0) |
| 2943 | size += sizeof ("+0x") - 1 + 8; |
| 2944 | } |
| 2945 | |
| 2946 | size += sizeof (asymbol) + sizeof ("__glink"); |
| 2947 | |
| 2948 | if (resolv_vma) |
| 2949 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); |
| 2950 | |
| 2951 | s = *ret = bfd_malloc (size); |
| 2952 | if (s == NULL) |
| 2953 | return -1; |
| 2954 | |
| 2955 | names = (char *) (s + count + 1 + (resolv_vma != 0)); |
| 2956 | p = relplt->relocation; |
| 2957 | for (i = 0; i < count; i++, p++) |
| 2958 | { |
| 2959 | size_t len; |
| 2960 | |
| 2961 | *s = **p->sym_ptr_ptr; |
| 2962 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since |
| 2963 | we are defining a symbol, ensure one of them is set. */ |
| 2964 | if ((s->flags & BSF_LOCAL) == 0) |
| 2965 | s->flags |= BSF_GLOBAL; |
| 2966 | s->flags |= BSF_SYNTHETIC; |
| 2967 | s->section = glink; |
| 2968 | s->value = stub_vma - glink->vma; |
| 2969 | s->name = names; |
| 2970 | s->udata.p = NULL; |
| 2971 | len = strlen ((*p->sym_ptr_ptr)->name); |
| 2972 | memcpy (names, (*p->sym_ptr_ptr)->name, len); |
| 2973 | names += len; |
| 2974 | if (p->addend != 0) |
| 2975 | { |
| 2976 | memcpy (names, "+0x", sizeof ("+0x") - 1); |
| 2977 | names += sizeof ("+0x") - 1; |
| 2978 | bfd_sprintf_vma (abfd, names, p->addend); |
| 2979 | names += strlen (names); |
| 2980 | } |
| 2981 | memcpy (names, "@plt", sizeof ("@plt")); |
| 2982 | names += sizeof ("@plt"); |
| 2983 | ++s; |
| 2984 | stub_vma += 16; |
| 2985 | } |
| 2986 | |
| 2987 | /* Add a symbol at the start of the glink branch table. */ |
| 2988 | memset (s, 0, sizeof *s); |
| 2989 | s->the_bfd = abfd; |
| 2990 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 2991 | s->section = glink; |
| 2992 | s->value = glink_vma - glink->vma; |
| 2993 | s->name = names; |
| 2994 | memcpy (names, "__glink", sizeof ("__glink")); |
| 2995 | names += sizeof ("__glink"); |
| 2996 | s++; |
| 2997 | count++; |
| 2998 | |
| 2999 | if (resolv_vma) |
| 3000 | { |
| 3001 | /* Add a symbol for the glink PLT resolver. */ |
| 3002 | memset (s, 0, sizeof *s); |
| 3003 | s->the_bfd = abfd; |
| 3004 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 3005 | s->section = glink; |
| 3006 | s->value = resolv_vma - glink->vma; |
| 3007 | s->name = names; |
| 3008 | memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); |
| 3009 | names += sizeof ("__glink_PLTresolve"); |
| 3010 | s++; |
| 3011 | count++; |
| 3012 | } |
| 3013 | |
| 3014 | return count; |
| 3015 | } |
| 3016 | \f |
| 3017 | /* The following functions are specific to the ELF linker, while |
| 3018 | functions above are used generally. They appear in this file more |
| 3019 | or less in the order in which they are called. eg. |
| 3020 | ppc_elf_check_relocs is called early in the link process, |
| 3021 | ppc_elf_finish_dynamic_sections is one of the last functions |
| 3022 | called. */ |
| 3023 | |
| 3024 | /* Track PLT entries needed for a given symbol. We might need more |
| 3025 | than one glink entry per symbol when generating a pic binary. */ |
| 3026 | struct plt_entry |
| 3027 | { |
| 3028 | struct plt_entry *next; |
| 3029 | |
| 3030 | /* -fPIC uses multiple GOT sections, one per file, called ".got2". |
| 3031 | This field stores the offset into .got2 used to initialise the |
| 3032 | GOT pointer reg. It will always be at least 32768. (Current |
| 3033 | gcc always uses an offset of 32768, but ld -r will pack .got2 |
| 3034 | sections together resulting in larger offsets). */ |
| 3035 | bfd_vma addend; |
| 3036 | |
| 3037 | /* The .got2 section. */ |
| 3038 | asection *sec; |
| 3039 | |
| 3040 | /* PLT refcount or offset. */ |
| 3041 | union |
| 3042 | { |
| 3043 | bfd_signed_vma refcount; |
| 3044 | bfd_vma offset; |
| 3045 | } plt; |
| 3046 | |
| 3047 | /* .glink stub offset. */ |
| 3048 | bfd_vma glink_offset; |
| 3049 | }; |
| 3050 | |
| 3051 | /* Of those relocs that might be copied as dynamic relocs, this function |
| 3052 | selects those that must be copied when linking a shared library, |
| 3053 | even when the symbol is local. */ |
| 3054 | |
| 3055 | static int |
| 3056 | must_be_dyn_reloc (struct bfd_link_info *info, |
| 3057 | enum elf_ppc_reloc_type r_type) |
| 3058 | { |
| 3059 | switch (r_type) |
| 3060 | { |
| 3061 | default: |
| 3062 | return 1; |
| 3063 | |
| 3064 | case R_PPC_REL24: |
| 3065 | case R_PPC_REL14: |
| 3066 | case R_PPC_REL14_BRTAKEN: |
| 3067 | case R_PPC_REL14_BRNTAKEN: |
| 3068 | case R_PPC_REL32: |
| 3069 | return 0; |
| 3070 | |
| 3071 | case R_PPC_TPREL32: |
| 3072 | case R_PPC_TPREL16: |
| 3073 | case R_PPC_TPREL16_LO: |
| 3074 | case R_PPC_TPREL16_HI: |
| 3075 | case R_PPC_TPREL16_HA: |
| 3076 | return !info->executable; |
| 3077 | } |
| 3078 | } |
| 3079 | |
| 3080 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 3081 | copying dynamic variables from a shared lib into an app's dynbss |
| 3082 | section, and instead use a dynamic relocation to point into the |
| 3083 | shared lib. */ |
| 3084 | #define ELIMINATE_COPY_RELOCS 1 |
| 3085 | |
| 3086 | /* Used to track dynamic relocations for local symbols. */ |
| 3087 | struct ppc_dyn_relocs |
| 3088 | { |
| 3089 | struct ppc_dyn_relocs *next; |
| 3090 | |
| 3091 | /* The input section of the reloc. */ |
| 3092 | asection *sec; |
| 3093 | |
| 3094 | /* Total number of relocs copied for the input section. */ |
| 3095 | unsigned int count : 31; |
| 3096 | |
| 3097 | /* Whether this entry is for STT_GNU_IFUNC symbols. */ |
| 3098 | unsigned int ifunc : 1; |
| 3099 | }; |
| 3100 | |
| 3101 | /* PPC ELF linker hash entry. */ |
| 3102 | |
| 3103 | struct ppc_elf_link_hash_entry |
| 3104 | { |
| 3105 | struct elf_link_hash_entry elf; |
| 3106 | |
| 3107 | /* If this symbol is used in the linker created sections, the processor |
| 3108 | specific backend uses this field to map the field into the offset |
| 3109 | from the beginning of the section. */ |
| 3110 | elf_linker_section_pointers_t *linker_section_pointer; |
| 3111 | |
| 3112 | /* Track dynamic relocs copied for this symbol. */ |
| 3113 | struct elf_dyn_relocs *dyn_relocs; |
| 3114 | |
| 3115 | /* Contexts in which symbol is used in the GOT (or TOC). |
| 3116 | TLS_GD .. TLS_TLS bits are or'd into the mask as the |
| 3117 | corresponding relocs are encountered during check_relocs. |
| 3118 | tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| 3119 | indicate the corresponding GOT entry type is not needed. */ |
| 3120 | #define TLS_GD 1 /* GD reloc. */ |
| 3121 | #define TLS_LD 2 /* LD reloc. */ |
| 3122 | #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| 3123 | #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| 3124 | #define TLS_TLS 16 /* Any TLS reloc. */ |
| 3125 | #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ |
| 3126 | #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ |
| 3127 | char tls_mask; |
| 3128 | |
| 3129 | /* Nonzero if we have seen a small data relocation referring to this |
| 3130 | symbol. */ |
| 3131 | unsigned char has_sda_refs; |
| 3132 | }; |
| 3133 | |
| 3134 | #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) |
| 3135 | |
| 3136 | /* PPC ELF linker hash table. */ |
| 3137 | |
| 3138 | struct ppc_elf_link_hash_table |
| 3139 | { |
| 3140 | struct elf_link_hash_table elf; |
| 3141 | |
| 3142 | /* Short-cuts to get to dynamic linker sections. */ |
| 3143 | asection *got; |
| 3144 | asection *relgot; |
| 3145 | asection *glink; |
| 3146 | asection *plt; |
| 3147 | asection *relplt; |
| 3148 | asection *iplt; |
| 3149 | asection *reliplt; |
| 3150 | asection *dynbss; |
| 3151 | asection *relbss; |
| 3152 | asection *dynsbss; |
| 3153 | asection *relsbss; |
| 3154 | elf_linker_section_t sdata[2]; |
| 3155 | asection *sbss; |
| 3156 | asection *glink_eh_frame; |
| 3157 | |
| 3158 | /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ |
| 3159 | asection *srelplt2; |
| 3160 | |
| 3161 | /* The .got.plt section (VxWorks only)*/ |
| 3162 | asection *sgotplt; |
| 3163 | |
| 3164 | /* Shortcut to __tls_get_addr. */ |
| 3165 | struct elf_link_hash_entry *tls_get_addr; |
| 3166 | |
| 3167 | /* The bfd that forced an old-style PLT. */ |
| 3168 | bfd *old_bfd; |
| 3169 | |
| 3170 | /* TLS local dynamic got entry handling. */ |
| 3171 | union { |
| 3172 | bfd_signed_vma refcount; |
| 3173 | bfd_vma offset; |
| 3174 | } tlsld_got; |
| 3175 | |
| 3176 | /* Offset of branch table to PltResolve function in glink. */ |
| 3177 | bfd_vma glink_pltresolve; |
| 3178 | |
| 3179 | /* Size of reserved GOT entries. */ |
| 3180 | unsigned int got_header_size; |
| 3181 | /* Non-zero if allocating the header left a gap. */ |
| 3182 | unsigned int got_gap; |
| 3183 | |
| 3184 | /* The type of PLT we have chosen to use. */ |
| 3185 | enum ppc_elf_plt_type plt_type; |
| 3186 | |
| 3187 | /* Set if we should emit symbols for stubs. */ |
| 3188 | unsigned int emit_stub_syms:1; |
| 3189 | |
| 3190 | /* Set if __tls_get_addr optimization should not be done. */ |
| 3191 | unsigned int no_tls_get_addr_opt:1; |
| 3192 | |
| 3193 | /* True if the target system is VxWorks. */ |
| 3194 | unsigned int is_vxworks:1; |
| 3195 | |
| 3196 | /* The size of PLT entries. */ |
| 3197 | int plt_entry_size; |
| 3198 | /* The distance between adjacent PLT slots. */ |
| 3199 | int plt_slot_size; |
| 3200 | /* The size of the first PLT entry. */ |
| 3201 | int plt_initial_entry_size; |
| 3202 | |
| 3203 | /* Small local sym cache. */ |
| 3204 | struct sym_cache sym_cache; |
| 3205 | }; |
| 3206 | |
| 3207 | /* Rename some of the generic section flags to better document how they |
| 3208 | are used for ppc32. The flags are only valid for ppc32 elf objects. */ |
| 3209 | |
| 3210 | /* Nonzero if this section has TLS related relocations. */ |
| 3211 | #define has_tls_reloc sec_flg0 |
| 3212 | |
| 3213 | /* Nonzero if this section has a call to __tls_get_addr. */ |
| 3214 | #define has_tls_get_addr_call sec_flg1 |
| 3215 | |
| 3216 | /* Get the PPC ELF linker hash table from a link_info structure. */ |
| 3217 | |
| 3218 | #define ppc_elf_hash_table(p) \ |
| 3219 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 3220 | == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) |
| 3221 | |
| 3222 | /* Create an entry in a PPC ELF linker hash table. */ |
| 3223 | |
| 3224 | static struct bfd_hash_entry * |
| 3225 | ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 3226 | struct bfd_hash_table *table, |
| 3227 | const char *string) |
| 3228 | { |
| 3229 | /* Allocate the structure if it has not already been allocated by a |
| 3230 | subclass. */ |
| 3231 | if (entry == NULL) |
| 3232 | { |
| 3233 | entry = bfd_hash_allocate (table, |
| 3234 | sizeof (struct ppc_elf_link_hash_entry)); |
| 3235 | if (entry == NULL) |
| 3236 | return entry; |
| 3237 | } |
| 3238 | |
| 3239 | /* Call the allocation method of the superclass. */ |
| 3240 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 3241 | if (entry != NULL) |
| 3242 | { |
| 3243 | ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; |
| 3244 | ppc_elf_hash_entry (entry)->dyn_relocs = NULL; |
| 3245 | ppc_elf_hash_entry (entry)->tls_mask = 0; |
| 3246 | ppc_elf_hash_entry (entry)->has_sda_refs = 0; |
| 3247 | } |
| 3248 | |
| 3249 | return entry; |
| 3250 | } |
| 3251 | |
| 3252 | /* Create a PPC ELF linker hash table. */ |
| 3253 | |
| 3254 | static struct bfd_link_hash_table * |
| 3255 | ppc_elf_link_hash_table_create (bfd *abfd) |
| 3256 | { |
| 3257 | struct ppc_elf_link_hash_table *ret; |
| 3258 | |
| 3259 | ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); |
| 3260 | if (ret == NULL) |
| 3261 | return NULL; |
| 3262 | |
| 3263 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 3264 | ppc_elf_link_hash_newfunc, |
| 3265 | sizeof (struct ppc_elf_link_hash_entry), |
| 3266 | PPC32_ELF_DATA)) |
| 3267 | { |
| 3268 | free (ret); |
| 3269 | return NULL; |
| 3270 | } |
| 3271 | |
| 3272 | ret->elf.init_plt_refcount.refcount = 0; |
| 3273 | ret->elf.init_plt_refcount.glist = NULL; |
| 3274 | ret->elf.init_plt_offset.offset = 0; |
| 3275 | ret->elf.init_plt_offset.glist = NULL; |
| 3276 | |
| 3277 | ret->sdata[0].name = ".sdata"; |
| 3278 | ret->sdata[0].sym_name = "_SDA_BASE_"; |
| 3279 | ret->sdata[0].bss_name = ".sbss"; |
| 3280 | |
| 3281 | ret->sdata[1].name = ".sdata2"; |
| 3282 | ret->sdata[1].sym_name = "_SDA2_BASE_"; |
| 3283 | ret->sdata[1].bss_name = ".sbss2"; |
| 3284 | |
| 3285 | ret->plt_entry_size = 12; |
| 3286 | ret->plt_slot_size = 8; |
| 3287 | ret->plt_initial_entry_size = 72; |
| 3288 | |
| 3289 | return &ret->elf.root; |
| 3290 | } |
| 3291 | |
| 3292 | /* Create .got and the related sections. */ |
| 3293 | |
| 3294 | static bfd_boolean |
| 3295 | ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) |
| 3296 | { |
| 3297 | struct ppc_elf_link_hash_table *htab; |
| 3298 | asection *s; |
| 3299 | flagword flags; |
| 3300 | |
| 3301 | if (!_bfd_elf_create_got_section (abfd, info)) |
| 3302 | return FALSE; |
| 3303 | |
| 3304 | htab = ppc_elf_hash_table (info); |
| 3305 | htab->got = s = bfd_get_linker_section (abfd, ".got"); |
| 3306 | if (s == NULL) |
| 3307 | abort (); |
| 3308 | |
| 3309 | if (htab->is_vxworks) |
| 3310 | { |
| 3311 | htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt"); |
| 3312 | if (!htab->sgotplt) |
| 3313 | abort (); |
| 3314 | } |
| 3315 | else |
| 3316 | { |
| 3317 | /* The powerpc .got has a blrl instruction in it. Mark it |
| 3318 | executable. */ |
| 3319 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS |
| 3320 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3321 | if (!bfd_set_section_flags (abfd, s, flags)) |
| 3322 | return FALSE; |
| 3323 | } |
| 3324 | |
| 3325 | htab->relgot = bfd_get_linker_section (abfd, ".rela.got"); |
| 3326 | if (!htab->relgot) |
| 3327 | abort (); |
| 3328 | |
| 3329 | return TRUE; |
| 3330 | } |
| 3331 | |
| 3332 | static bfd_boolean |
| 3333 | ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) |
| 3334 | { |
| 3335 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3336 | asection *s; |
| 3337 | flagword flags; |
| 3338 | |
| 3339 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS |
| 3340 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3341 | s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); |
| 3342 | htab->glink = s; |
| 3343 | if (s == NULL |
| 3344 | || !bfd_set_section_alignment (abfd, s, 4)) |
| 3345 | return FALSE; |
| 3346 | |
| 3347 | if (!info->no_ld_generated_unwind_info) |
| 3348 | { |
| 3349 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3350 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3351 | s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); |
| 3352 | htab->glink_eh_frame = s; |
| 3353 | if (s == NULL |
| 3354 | || !bfd_set_section_alignment (abfd, s, 2)) |
| 3355 | return FALSE; |
| 3356 | } |
| 3357 | |
| 3358 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
| 3359 | s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); |
| 3360 | htab->iplt = s; |
| 3361 | if (s == NULL |
| 3362 | || !bfd_set_section_alignment (abfd, s, 4)) |
| 3363 | return FALSE; |
| 3364 | |
| 3365 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3366 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3367 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); |
| 3368 | htab->reliplt = s; |
| 3369 | if (s == NULL |
| 3370 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3371 | return FALSE; |
| 3372 | return TRUE; |
| 3373 | } |
| 3374 | |
| 3375 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| 3376 | to output sections (just like _bfd_elf_create_dynamic_sections has |
| 3377 | to create .dynbss and .rela.bss). */ |
| 3378 | |
| 3379 | static bfd_boolean |
| 3380 | ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 3381 | { |
| 3382 | struct ppc_elf_link_hash_table *htab; |
| 3383 | asection *s; |
| 3384 | flagword flags; |
| 3385 | |
| 3386 | htab = ppc_elf_hash_table (info); |
| 3387 | |
| 3388 | if (htab->got == NULL |
| 3389 | && !ppc_elf_create_got (abfd, info)) |
| 3390 | return FALSE; |
| 3391 | |
| 3392 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| 3393 | return FALSE; |
| 3394 | |
| 3395 | if (htab->glink == NULL |
| 3396 | && !ppc_elf_create_glink (abfd, info)) |
| 3397 | return FALSE; |
| 3398 | |
| 3399 | htab->dynbss = bfd_get_linker_section (abfd, ".dynbss"); |
| 3400 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", |
| 3401 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 3402 | htab->dynsbss = s; |
| 3403 | if (s == NULL) |
| 3404 | return FALSE; |
| 3405 | |
| 3406 | if (! info->shared) |
| 3407 | { |
| 3408 | htab->relbss = bfd_get_linker_section (abfd, ".rela.bss"); |
| 3409 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3410 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3411 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); |
| 3412 | htab->relsbss = s; |
| 3413 | if (s == NULL |
| 3414 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3415 | return FALSE; |
| 3416 | } |
| 3417 | |
| 3418 | if (htab->is_vxworks |
| 3419 | && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) |
| 3420 | return FALSE; |
| 3421 | |
| 3422 | htab->relplt = bfd_get_linker_section (abfd, ".rela.plt"); |
| 3423 | htab->plt = s = bfd_get_linker_section (abfd, ".plt"); |
| 3424 | if (s == NULL) |
| 3425 | abort (); |
| 3426 | |
| 3427 | flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; |
| 3428 | if (htab->plt_type == PLT_VXWORKS) |
| 3429 | /* The VxWorks PLT is a loaded section with contents. */ |
| 3430 | flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; |
| 3431 | return bfd_set_section_flags (abfd, s, flags); |
| 3432 | } |
| 3433 | |
| 3434 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 3435 | |
| 3436 | static void |
| 3437 | ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 3438 | struct elf_link_hash_entry *dir, |
| 3439 | struct elf_link_hash_entry *ind) |
| 3440 | { |
| 3441 | struct ppc_elf_link_hash_entry *edir, *eind; |
| 3442 | |
| 3443 | edir = (struct ppc_elf_link_hash_entry *) dir; |
| 3444 | eind = (struct ppc_elf_link_hash_entry *) ind; |
| 3445 | |
| 3446 | edir->tls_mask |= eind->tls_mask; |
| 3447 | edir->has_sda_refs |= eind->has_sda_refs; |
| 3448 | |
| 3449 | /* If called to transfer flags for a weakdef during processing |
| 3450 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. |
| 3451 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 3452 | if (!(ELIMINATE_COPY_RELOCS |
| 3453 | && eind->elf.root.type != bfd_link_hash_indirect |
| 3454 | && edir->elf.dynamic_adjusted)) |
| 3455 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
| 3456 | |
| 3457 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
| 3458 | edir->elf.ref_regular |= eind->elf.ref_regular; |
| 3459 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; |
| 3460 | edir->elf.needs_plt |= eind->elf.needs_plt; |
| 3461 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; |
| 3462 | |
| 3463 | if (eind->dyn_relocs != NULL) |
| 3464 | { |
| 3465 | if (edir->dyn_relocs != NULL) |
| 3466 | { |
| 3467 | struct elf_dyn_relocs **pp; |
| 3468 | struct elf_dyn_relocs *p; |
| 3469 | |
| 3470 | /* Add reloc counts against the indirect sym to the direct sym |
| 3471 | list. Merge any entries against the same section. */ |
| 3472 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 3473 | { |
| 3474 | struct elf_dyn_relocs *q; |
| 3475 | |
| 3476 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 3477 | if (q->sec == p->sec) |
| 3478 | { |
| 3479 | q->pc_count += p->pc_count; |
| 3480 | q->count += p->count; |
| 3481 | *pp = p->next; |
| 3482 | break; |
| 3483 | } |
| 3484 | if (q == NULL) |
| 3485 | pp = &p->next; |
| 3486 | } |
| 3487 | *pp = edir->dyn_relocs; |
| 3488 | } |
| 3489 | |
| 3490 | edir->dyn_relocs = eind->dyn_relocs; |
| 3491 | eind->dyn_relocs = NULL; |
| 3492 | } |
| 3493 | |
| 3494 | /* If we were called to copy over info for a weak sym, that's all. |
| 3495 | You might think dyn_relocs need not be copied over; After all, |
| 3496 | both syms will be dynamic or both non-dynamic so we're just |
| 3497 | moving reloc accounting around. However, ELIMINATE_COPY_RELOCS |
| 3498 | code in ppc_elf_adjust_dynamic_symbol needs to check for |
| 3499 | dyn_relocs in read-only sections, and it does so on what is the |
| 3500 | DIR sym here. */ |
| 3501 | if (eind->elf.root.type != bfd_link_hash_indirect) |
| 3502 | return; |
| 3503 | |
| 3504 | /* Copy over the GOT refcount entries that we may have already seen to |
| 3505 | the symbol which just became indirect. */ |
| 3506 | edir->elf.got.refcount += eind->elf.got.refcount; |
| 3507 | eind->elf.got.refcount = 0; |
| 3508 | |
| 3509 | /* And plt entries. */ |
| 3510 | if (eind->elf.plt.plist != NULL) |
| 3511 | { |
| 3512 | if (edir->elf.plt.plist != NULL) |
| 3513 | { |
| 3514 | struct plt_entry **entp; |
| 3515 | struct plt_entry *ent; |
| 3516 | |
| 3517 | for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) |
| 3518 | { |
| 3519 | struct plt_entry *dent; |
| 3520 | |
| 3521 | for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) |
| 3522 | if (dent->sec == ent->sec && dent->addend == ent->addend) |
| 3523 | { |
| 3524 | dent->plt.refcount += ent->plt.refcount; |
| 3525 | *entp = ent->next; |
| 3526 | break; |
| 3527 | } |
| 3528 | if (dent == NULL) |
| 3529 | entp = &ent->next; |
| 3530 | } |
| 3531 | *entp = edir->elf.plt.plist; |
| 3532 | } |
| 3533 | |
| 3534 | edir->elf.plt.plist = eind->elf.plt.plist; |
| 3535 | eind->elf.plt.plist = NULL; |
| 3536 | } |
| 3537 | |
| 3538 | if (eind->elf.dynindx != -1) |
| 3539 | { |
| 3540 | if (edir->elf.dynindx != -1) |
| 3541 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 3542 | edir->elf.dynstr_index); |
| 3543 | edir->elf.dynindx = eind->elf.dynindx; |
| 3544 | edir->elf.dynstr_index = eind->elf.dynstr_index; |
| 3545 | eind->elf.dynindx = -1; |
| 3546 | eind->elf.dynstr_index = 0; |
| 3547 | } |
| 3548 | } |
| 3549 | |
| 3550 | /* Hook called by the linker routine which adds symbols from an object |
| 3551 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 3552 | |
| 3553 | static bfd_boolean |
| 3554 | ppc_elf_add_symbol_hook (bfd *abfd, |
| 3555 | struct bfd_link_info *info, |
| 3556 | Elf_Internal_Sym *sym, |
| 3557 | const char **namep ATTRIBUTE_UNUSED, |
| 3558 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 3559 | asection **secp, |
| 3560 | bfd_vma *valp) |
| 3561 | { |
| 3562 | if (sym->st_shndx == SHN_COMMON |
| 3563 | && !info->relocatable |
| 3564 | && is_ppc_elf (info->output_bfd) |
| 3565 | && sym->st_size <= elf_gp_size (abfd)) |
| 3566 | { |
| 3567 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 3568 | put into .sbss. */ |
| 3569 | struct ppc_elf_link_hash_table *htab; |
| 3570 | |
| 3571 | htab = ppc_elf_hash_table (info); |
| 3572 | if (htab->sbss == NULL) |
| 3573 | { |
| 3574 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; |
| 3575 | |
| 3576 | if (!htab->elf.dynobj) |
| 3577 | htab->elf.dynobj = abfd; |
| 3578 | |
| 3579 | htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 3580 | ".sbss", |
| 3581 | flags); |
| 3582 | if (htab->sbss == NULL) |
| 3583 | return FALSE; |
| 3584 | } |
| 3585 | |
| 3586 | *secp = htab->sbss; |
| 3587 | *valp = sym->st_size; |
| 3588 | } |
| 3589 | |
| 3590 | if ((abfd->flags & DYNAMIC) == 0 |
| 3591 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
| 3592 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) |
| 3593 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; |
| 3594 | |
| 3595 | return TRUE; |
| 3596 | } |
| 3597 | \f |
| 3598 | static bfd_boolean |
| 3599 | create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect) |
| 3600 | { |
| 3601 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3602 | |
| 3603 | lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name, |
| 3604 | TRUE, FALSE, TRUE); |
| 3605 | if (lsect->sym == NULL) |
| 3606 | return FALSE; |
| 3607 | if (lsect->sym->root.type == bfd_link_hash_new) |
| 3608 | lsect->sym->non_elf = 0; |
| 3609 | lsect->sym->ref_regular = 1; |
| 3610 | _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE); |
| 3611 | return TRUE; |
| 3612 | } |
| 3613 | |
| 3614 | /* Create a special linker section. */ |
| 3615 | |
| 3616 | static bfd_boolean |
| 3617 | ppc_elf_create_linker_section (bfd *abfd, |
| 3618 | struct bfd_link_info *info, |
| 3619 | flagword flags, |
| 3620 | elf_linker_section_t *lsect) |
| 3621 | { |
| 3622 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 3623 | asection *s; |
| 3624 | |
| 3625 | flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3626 | | SEC_LINKER_CREATED); |
| 3627 | |
| 3628 | /* Record the first bfd that needs the special sections. */ |
| 3629 | if (!htab->elf.dynobj) |
| 3630 | htab->elf.dynobj = abfd; |
| 3631 | |
| 3632 | s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 3633 | lsect->name, |
| 3634 | flags); |
| 3635 | if (s == NULL |
| 3636 | || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) |
| 3637 | return FALSE; |
| 3638 | lsect->section = s; |
| 3639 | |
| 3640 | return create_sdata_sym (info, lsect); |
| 3641 | } |
| 3642 | |
| 3643 | /* Find a linker generated pointer with a given addend and type. */ |
| 3644 | |
| 3645 | static elf_linker_section_pointers_t * |
| 3646 | elf_find_pointer_linker_section |
| 3647 | (elf_linker_section_pointers_t *linker_pointers, |
| 3648 | bfd_vma addend, |
| 3649 | elf_linker_section_t *lsect) |
| 3650 | { |
| 3651 | for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) |
| 3652 | if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) |
| 3653 | return linker_pointers; |
| 3654 | |
| 3655 | return NULL; |
| 3656 | } |
| 3657 | |
| 3658 | /* Allocate a pointer to live in a linker created section. */ |
| 3659 | |
| 3660 | static bfd_boolean |
| 3661 | elf_create_pointer_linker_section (bfd *abfd, |
| 3662 | elf_linker_section_t *lsect, |
| 3663 | struct elf_link_hash_entry *h, |
| 3664 | const Elf_Internal_Rela *rel) |
| 3665 | { |
| 3666 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; |
| 3667 | elf_linker_section_pointers_t *linker_section_ptr; |
| 3668 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 3669 | bfd_size_type amt; |
| 3670 | |
| 3671 | BFD_ASSERT (lsect != NULL); |
| 3672 | |
| 3673 | /* Is this a global symbol? */ |
| 3674 | if (h != NULL) |
| 3675 | { |
| 3676 | struct ppc_elf_link_hash_entry *eh; |
| 3677 | |
| 3678 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 3679 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 3680 | if (elf_find_pointer_linker_section (eh->linker_section_pointer, |
| 3681 | rel->r_addend, |
| 3682 | lsect)) |
| 3683 | return TRUE; |
| 3684 | |
| 3685 | ptr_linker_section_ptr = &eh->linker_section_pointer; |
| 3686 | } |
| 3687 | else |
| 3688 | { |
| 3689 | BFD_ASSERT (is_ppc_elf (abfd)); |
| 3690 | |
| 3691 | /* Allocation of a pointer to a local symbol. */ |
| 3692 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
| 3693 | |
| 3694 | /* Allocate a table to hold the local symbols if first time. */ |
| 3695 | if (!ptr) |
| 3696 | { |
| 3697 | unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; |
| 3698 | |
| 3699 | amt = num_symbols; |
| 3700 | amt *= sizeof (elf_linker_section_pointers_t *); |
| 3701 | ptr = bfd_zalloc (abfd, amt); |
| 3702 | |
| 3703 | if (!ptr) |
| 3704 | return FALSE; |
| 3705 | |
| 3706 | elf_local_ptr_offsets (abfd) = ptr; |
| 3707 | } |
| 3708 | |
| 3709 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 3710 | if (elf_find_pointer_linker_section (ptr[r_symndx], |
| 3711 | rel->r_addend, |
| 3712 | lsect)) |
| 3713 | return TRUE; |
| 3714 | |
| 3715 | ptr_linker_section_ptr = &ptr[r_symndx]; |
| 3716 | } |
| 3717 | |
| 3718 | /* Allocate space for a pointer in the linker section, and allocate |
| 3719 | a new pointer record from internal memory. */ |
| 3720 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
| 3721 | amt = sizeof (elf_linker_section_pointers_t); |
| 3722 | linker_section_ptr = bfd_alloc (abfd, amt); |
| 3723 | |
| 3724 | if (!linker_section_ptr) |
| 3725 | return FALSE; |
| 3726 | |
| 3727 | linker_section_ptr->next = *ptr_linker_section_ptr; |
| 3728 | linker_section_ptr->addend = rel->r_addend; |
| 3729 | linker_section_ptr->lsect = lsect; |
| 3730 | *ptr_linker_section_ptr = linker_section_ptr; |
| 3731 | |
| 3732 | linker_section_ptr->offset = lsect->section->size; |
| 3733 | lsect->section->size += 4; |
| 3734 | |
| 3735 | #ifdef DEBUG |
| 3736 | fprintf (stderr, |
| 3737 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", |
| 3738 | lsect->name, (long) linker_section_ptr->offset, |
| 3739 | (long) lsect->section->size); |
| 3740 | #endif |
| 3741 | |
| 3742 | return TRUE; |
| 3743 | } |
| 3744 | |
| 3745 | static struct plt_entry ** |
| 3746 | update_local_sym_info (bfd *abfd, |
| 3747 | Elf_Internal_Shdr *symtab_hdr, |
| 3748 | unsigned long r_symndx, |
| 3749 | int tls_type) |
| 3750 | { |
| 3751 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3752 | struct plt_entry **local_plt; |
| 3753 | char *local_got_tls_masks; |
| 3754 | |
| 3755 | if (local_got_refcounts == NULL) |
| 3756 | { |
| 3757 | bfd_size_type size = symtab_hdr->sh_info; |
| 3758 | |
| 3759 | size *= (sizeof (*local_got_refcounts) |
| 3760 | + sizeof (*local_plt) |
| 3761 | + sizeof (*local_got_tls_masks)); |
| 3762 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 3763 | if (local_got_refcounts == NULL) |
| 3764 | return NULL; |
| 3765 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 3766 | } |
| 3767 | |
| 3768 | local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); |
| 3769 | local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 3770 | local_got_tls_masks[r_symndx] |= tls_type; |
| 3771 | if (tls_type != PLT_IFUNC) |
| 3772 | local_got_refcounts[r_symndx] += 1; |
| 3773 | return local_plt + r_symndx; |
| 3774 | } |
| 3775 | |
| 3776 | static bfd_boolean |
| 3777 | update_plt_info (bfd *abfd, struct plt_entry **plist, |
| 3778 | asection *sec, bfd_vma addend) |
| 3779 | { |
| 3780 | struct plt_entry *ent; |
| 3781 | |
| 3782 | if (addend < 32768) |
| 3783 | sec = NULL; |
| 3784 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 3785 | if (ent->sec == sec && ent->addend == addend) |
| 3786 | break; |
| 3787 | if (ent == NULL) |
| 3788 | { |
| 3789 | bfd_size_type amt = sizeof (*ent); |
| 3790 | ent = bfd_alloc (abfd, amt); |
| 3791 | if (ent == NULL) |
| 3792 | return FALSE; |
| 3793 | ent->next = *plist; |
| 3794 | ent->sec = sec; |
| 3795 | ent->addend = addend; |
| 3796 | ent->plt.refcount = 0; |
| 3797 | *plist = ent; |
| 3798 | } |
| 3799 | ent->plt.refcount += 1; |
| 3800 | return TRUE; |
| 3801 | } |
| 3802 | |
| 3803 | static struct plt_entry * |
| 3804 | find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) |
| 3805 | { |
| 3806 | struct plt_entry *ent; |
| 3807 | |
| 3808 | if (addend < 32768) |
| 3809 | sec = NULL; |
| 3810 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 3811 | if (ent->sec == sec && ent->addend == addend) |
| 3812 | break; |
| 3813 | return ent; |
| 3814 | } |
| 3815 | |
| 3816 | static bfd_boolean |
| 3817 | is_branch_reloc (enum elf_ppc_reloc_type r_type) |
| 3818 | { |
| 3819 | return (r_type == R_PPC_PLTREL24 |
| 3820 | || r_type == R_PPC_LOCAL24PC |
| 3821 | || r_type == R_PPC_REL24 |
| 3822 | || r_type == R_PPC_REL14 |
| 3823 | || r_type == R_PPC_REL14_BRTAKEN |
| 3824 | || r_type == R_PPC_REL14_BRNTAKEN |
| 3825 | || r_type == R_PPC_ADDR24 |
| 3826 | || r_type == R_PPC_ADDR14 |
| 3827 | || r_type == R_PPC_ADDR14_BRTAKEN |
| 3828 | || r_type == R_PPC_ADDR14_BRNTAKEN); |
| 3829 | } |
| 3830 | |
| 3831 | static void |
| 3832 | bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) |
| 3833 | { |
| 3834 | (*_bfd_error_handler) |
| 3835 | (_("%B: relocation %s cannot be used when making a shared object"), |
| 3836 | abfd, |
| 3837 | ppc_elf_howto_table[r_type]->name); |
| 3838 | bfd_set_error (bfd_error_bad_value); |
| 3839 | } |
| 3840 | |
| 3841 | /* Look through the relocs for a section during the first phase, and |
| 3842 | allocate space in the global offset table or procedure linkage |
| 3843 | table. */ |
| 3844 | |
| 3845 | static bfd_boolean |
| 3846 | ppc_elf_check_relocs (bfd *abfd, |
| 3847 | struct bfd_link_info *info, |
| 3848 | asection *sec, |
| 3849 | const Elf_Internal_Rela *relocs) |
| 3850 | { |
| 3851 | struct ppc_elf_link_hash_table *htab; |
| 3852 | Elf_Internal_Shdr *symtab_hdr; |
| 3853 | struct elf_link_hash_entry **sym_hashes; |
| 3854 | const Elf_Internal_Rela *rel; |
| 3855 | const Elf_Internal_Rela *rel_end; |
| 3856 | asection *got2, *sreloc; |
| 3857 | struct elf_link_hash_entry *tga; |
| 3858 | |
| 3859 | if (info->relocatable) |
| 3860 | return TRUE; |
| 3861 | |
| 3862 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 3863 | In particular, any relocs in such sections should not affect GOT |
| 3864 | and PLT reference counting (ie. we don't allow them to create GOT |
| 3865 | or PLT entries), there's no possibility or desire to optimize TLS |
| 3866 | relocs, and there's not much point in propagating relocs to shared |
| 3867 | libs that the dynamic linker won't relocate. */ |
| 3868 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3869 | return TRUE; |
| 3870 | |
| 3871 | #ifdef DEBUG |
| 3872 | _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", |
| 3873 | sec, abfd); |
| 3874 | #endif |
| 3875 | |
| 3876 | BFD_ASSERT (is_ppc_elf (abfd)); |
| 3877 | |
| 3878 | /* Initialize howto table if not already done. */ |
| 3879 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 3880 | ppc_elf_howto_init (); |
| 3881 | |
| 3882 | htab = ppc_elf_hash_table (info); |
| 3883 | if (htab->glink == NULL) |
| 3884 | { |
| 3885 | if (htab->elf.dynobj == NULL) |
| 3886 | htab->elf.dynobj = abfd; |
| 3887 | if (!ppc_elf_create_glink (htab->elf.dynobj, info)) |
| 3888 | return FALSE; |
| 3889 | } |
| 3890 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 3891 | FALSE, FALSE, TRUE); |
| 3892 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 3893 | sym_hashes = elf_sym_hashes (abfd); |
| 3894 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 3895 | sreloc = NULL; |
| 3896 | |
| 3897 | rel_end = relocs + sec->reloc_count; |
| 3898 | for (rel = relocs; rel < rel_end; rel++) |
| 3899 | { |
| 3900 | unsigned long r_symndx; |
| 3901 | enum elf_ppc_reloc_type r_type; |
| 3902 | struct elf_link_hash_entry *h; |
| 3903 | int tls_type; |
| 3904 | |
| 3905 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3906 | if (r_symndx < symtab_hdr->sh_info) |
| 3907 | h = NULL; |
| 3908 | else |
| 3909 | { |
| 3910 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3911 | while (h->root.type == bfd_link_hash_indirect |
| 3912 | || h->root.type == bfd_link_hash_warning) |
| 3913 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3914 | |
| 3915 | /* PR15323, ref flags aren't set for references in the same |
| 3916 | object. */ |
| 3917 | h->root.non_ir_ref = 1; |
| 3918 | } |
| 3919 | |
| 3920 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 3921 | This shows up in particular in an R_PPC_ADDR32 in the eabi |
| 3922 | startup code. */ |
| 3923 | if (h != NULL |
| 3924 | && htab->got == NULL |
| 3925 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3926 | { |
| 3927 | if (htab->elf.dynobj == NULL) |
| 3928 | htab->elf.dynobj = abfd; |
| 3929 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 3930 | return FALSE; |
| 3931 | BFD_ASSERT (h == htab->elf.hgot); |
| 3932 | } |
| 3933 | |
| 3934 | tls_type = 0; |
| 3935 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3936 | if (h == NULL && !htab->is_vxworks) |
| 3937 | { |
| 3938 | Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 3939 | abfd, r_symndx); |
| 3940 | if (isym == NULL) |
| 3941 | return FALSE; |
| 3942 | |
| 3943 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 3944 | { |
| 3945 | struct plt_entry **ifunc; |
| 3946 | |
| 3947 | /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ |
| 3948 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 3949 | PLT_IFUNC); |
| 3950 | if (ifunc == NULL) |
| 3951 | return FALSE; |
| 3952 | |
| 3953 | /* STT_GNU_IFUNC symbols must have a PLT entry; |
| 3954 | In a non-pie executable even when there are |
| 3955 | no plt calls. */ |
| 3956 | if (!info->shared |
| 3957 | || is_branch_reloc (r_type)) |
| 3958 | { |
| 3959 | bfd_vma addend = 0; |
| 3960 | if (r_type == R_PPC_PLTREL24) |
| 3961 | { |
| 3962 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
| 3963 | if (info->shared) |
| 3964 | addend = rel->r_addend; |
| 3965 | } |
| 3966 | if (!update_plt_info (abfd, ifunc, got2, addend)) |
| 3967 | return FALSE; |
| 3968 | } |
| 3969 | } |
| 3970 | } |
| 3971 | |
| 3972 | if (!htab->is_vxworks |
| 3973 | && is_branch_reloc (r_type) |
| 3974 | && h != NULL |
| 3975 | && h == tga) |
| 3976 | { |
| 3977 | if (rel != relocs |
| 3978 | && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD |
| 3979 | || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) |
| 3980 | /* We have a new-style __tls_get_addr call with a marker |
| 3981 | reloc. */ |
| 3982 | ; |
| 3983 | else |
| 3984 | /* Mark this section as having an old-style call. */ |
| 3985 | sec->has_tls_get_addr_call = 1; |
| 3986 | } |
| 3987 | |
| 3988 | switch (r_type) |
| 3989 | { |
| 3990 | case R_PPC_TLSGD: |
| 3991 | case R_PPC_TLSLD: |
| 3992 | /* These special tls relocs tie a call to __tls_get_addr with |
| 3993 | its parameter symbol. */ |
| 3994 | break; |
| 3995 | |
| 3996 | case R_PPC_GOT_TLSLD16: |
| 3997 | case R_PPC_GOT_TLSLD16_LO: |
| 3998 | case R_PPC_GOT_TLSLD16_HI: |
| 3999 | case R_PPC_GOT_TLSLD16_HA: |
| 4000 | tls_type = TLS_TLS | TLS_LD; |
| 4001 | goto dogottls; |
| 4002 | |
| 4003 | case R_PPC_GOT_TLSGD16: |
| 4004 | case R_PPC_GOT_TLSGD16_LO: |
| 4005 | case R_PPC_GOT_TLSGD16_HI: |
| 4006 | case R_PPC_GOT_TLSGD16_HA: |
| 4007 | tls_type = TLS_TLS | TLS_GD; |
| 4008 | goto dogottls; |
| 4009 | |
| 4010 | case R_PPC_GOT_TPREL16: |
| 4011 | case R_PPC_GOT_TPREL16_LO: |
| 4012 | case R_PPC_GOT_TPREL16_HI: |
| 4013 | case R_PPC_GOT_TPREL16_HA: |
| 4014 | if (!info->executable) |
| 4015 | info->flags |= DF_STATIC_TLS; |
| 4016 | tls_type = TLS_TLS | TLS_TPREL; |
| 4017 | goto dogottls; |
| 4018 | |
| 4019 | case R_PPC_GOT_DTPREL16: |
| 4020 | case R_PPC_GOT_DTPREL16_LO: |
| 4021 | case R_PPC_GOT_DTPREL16_HI: |
| 4022 | case R_PPC_GOT_DTPREL16_HA: |
| 4023 | tls_type = TLS_TLS | TLS_DTPREL; |
| 4024 | dogottls: |
| 4025 | sec->has_tls_reloc = 1; |
| 4026 | /* Fall thru */ |
| 4027 | |
| 4028 | /* GOT16 relocations */ |
| 4029 | case R_PPC_GOT16: |
| 4030 | case R_PPC_GOT16_LO: |
| 4031 | case R_PPC_GOT16_HI: |
| 4032 | case R_PPC_GOT16_HA: |
| 4033 | /* This symbol requires a global offset table entry. */ |
| 4034 | if (htab->got == NULL) |
| 4035 | { |
| 4036 | if (htab->elf.dynobj == NULL) |
| 4037 | htab->elf.dynobj = abfd; |
| 4038 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 4039 | return FALSE; |
| 4040 | } |
| 4041 | if (h != NULL) |
| 4042 | { |
| 4043 | h->got.refcount += 1; |
| 4044 | ppc_elf_hash_entry (h)->tls_mask |= tls_type; |
| 4045 | } |
| 4046 | else |
| 4047 | /* This is a global offset table entry for a local symbol. */ |
| 4048 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) |
| 4049 | return FALSE; |
| 4050 | |
| 4051 | /* We may also need a plt entry if the symbol turns out to be |
| 4052 | an ifunc. */ |
| 4053 | if (h != NULL && !info->shared) |
| 4054 | { |
| 4055 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4056 | return FALSE; |
| 4057 | } |
| 4058 | break; |
| 4059 | |
| 4060 | /* Indirect .sdata relocation. */ |
| 4061 | case R_PPC_EMB_SDAI16: |
| 4062 | if (info->shared) |
| 4063 | { |
| 4064 | bad_shared_reloc (abfd, r_type); |
| 4065 | return FALSE; |
| 4066 | } |
| 4067 | if (htab->sdata[0].section == NULL |
| 4068 | && !ppc_elf_create_linker_section (abfd, info, 0, |
| 4069 | &htab->sdata[0])) |
| 4070 | return FALSE; |
| 4071 | if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], |
| 4072 | h, rel)) |
| 4073 | return FALSE; |
| 4074 | if (h != NULL) |
| 4075 | { |
| 4076 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4077 | h->non_got_ref = TRUE; |
| 4078 | } |
| 4079 | break; |
| 4080 | |
| 4081 | /* Indirect .sdata2 relocation. */ |
| 4082 | case R_PPC_EMB_SDA2I16: |
| 4083 | if (info->shared) |
| 4084 | { |
| 4085 | bad_shared_reloc (abfd, r_type); |
| 4086 | return FALSE; |
| 4087 | } |
| 4088 | if (htab->sdata[1].section == NULL |
| 4089 | && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, |
| 4090 | &htab->sdata[1])) |
| 4091 | return FALSE; |
| 4092 | if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], |
| 4093 | h, rel)) |
| 4094 | return FALSE; |
| 4095 | if (h != NULL) |
| 4096 | { |
| 4097 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4098 | h->non_got_ref = TRUE; |
| 4099 | } |
| 4100 | break; |
| 4101 | |
| 4102 | case R_PPC_VLE_SDAREL_LO16A: |
| 4103 | case R_PPC_VLE_SDAREL_LO16D: |
| 4104 | case R_PPC_VLE_SDAREL_HI16A: |
| 4105 | case R_PPC_VLE_SDAREL_HI16D: |
| 4106 | case R_PPC_VLE_SDAREL_HA16A: |
| 4107 | case R_PPC_VLE_SDAREL_HA16D: |
| 4108 | case R_PPC_SDAREL16: |
| 4109 | if (htab->sdata[0].sym == NULL |
| 4110 | && !create_sdata_sym (info, &htab->sdata[0])) |
| 4111 | return FALSE; |
| 4112 | |
| 4113 | if (htab->sdata[1].sym == NULL |
| 4114 | && !create_sdata_sym (info, &htab->sdata[1])) |
| 4115 | return FALSE; |
| 4116 | |
| 4117 | if (h != NULL) |
| 4118 | { |
| 4119 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4120 | h->non_got_ref = TRUE; |
| 4121 | } |
| 4122 | break; |
| 4123 | |
| 4124 | case R_PPC_VLE_REL8: |
| 4125 | case R_PPC_VLE_REL15: |
| 4126 | case R_PPC_VLE_REL24: |
| 4127 | case R_PPC_VLE_LO16A: |
| 4128 | case R_PPC_VLE_LO16D: |
| 4129 | case R_PPC_VLE_HI16A: |
| 4130 | case R_PPC_VLE_HI16D: |
| 4131 | case R_PPC_VLE_HA16A: |
| 4132 | case R_PPC_VLE_HA16D: |
| 4133 | break; |
| 4134 | |
| 4135 | case R_PPC_EMB_SDA2REL: |
| 4136 | if (info->shared) |
| 4137 | { |
| 4138 | bad_shared_reloc (abfd, r_type); |
| 4139 | return FALSE; |
| 4140 | } |
| 4141 | if (htab->sdata[1].sym == NULL |
| 4142 | && !create_sdata_sym (info, &htab->sdata[1])) |
| 4143 | return FALSE; |
| 4144 | if (h != NULL) |
| 4145 | { |
| 4146 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4147 | h->non_got_ref = TRUE; |
| 4148 | } |
| 4149 | break; |
| 4150 | |
| 4151 | case R_PPC_VLE_SDA21_LO: |
| 4152 | case R_PPC_VLE_SDA21: |
| 4153 | case R_PPC_EMB_SDA21: |
| 4154 | case R_PPC_EMB_RELSDA: |
| 4155 | if (info->shared) |
| 4156 | { |
| 4157 | bad_shared_reloc (abfd, r_type); |
| 4158 | return FALSE; |
| 4159 | } |
| 4160 | if (htab->sdata[0].sym == NULL |
| 4161 | && !create_sdata_sym (info, &htab->sdata[0])) |
| 4162 | return FALSE; |
| 4163 | if (htab->sdata[1].sym == NULL |
| 4164 | && !create_sdata_sym (info, &htab->sdata[1])) |
| 4165 | return FALSE; |
| 4166 | if (h != NULL) |
| 4167 | { |
| 4168 | ppc_elf_hash_entry (h)->has_sda_refs = TRUE; |
| 4169 | h->non_got_ref = TRUE; |
| 4170 | } |
| 4171 | break; |
| 4172 | |
| 4173 | case R_PPC_EMB_NADDR32: |
| 4174 | case R_PPC_EMB_NADDR16: |
| 4175 | case R_PPC_EMB_NADDR16_LO: |
| 4176 | case R_PPC_EMB_NADDR16_HI: |
| 4177 | case R_PPC_EMB_NADDR16_HA: |
| 4178 | if (info->shared) |
| 4179 | { |
| 4180 | bad_shared_reloc (abfd, r_type); |
| 4181 | return FALSE; |
| 4182 | } |
| 4183 | if (h != NULL) |
| 4184 | h->non_got_ref = TRUE; |
| 4185 | break; |
| 4186 | |
| 4187 | case R_PPC_PLTREL24: |
| 4188 | if (h == NULL) |
| 4189 | break; |
| 4190 | /* Fall through */ |
| 4191 | case R_PPC_PLT32: |
| 4192 | case R_PPC_PLTREL32: |
| 4193 | case R_PPC_PLT16_LO: |
| 4194 | case R_PPC_PLT16_HI: |
| 4195 | case R_PPC_PLT16_HA: |
| 4196 | #ifdef DEBUG |
| 4197 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 4198 | #endif |
| 4199 | /* This symbol requires a procedure linkage table entry. We |
| 4200 | actually build the entry in finish_dynamic_symbol, |
| 4201 | because this might be a case of linking PIC code without |
| 4202 | linking in any dynamic objects, in which case we don't |
| 4203 | need to generate a procedure linkage table after all. */ |
| 4204 | |
| 4205 | if (h == NULL) |
| 4206 | { |
| 4207 | /* It does not make sense to have a procedure linkage |
| 4208 | table entry for a local symbol. */ |
| 4209 | info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"), |
| 4210 | abfd, sec, rel->r_offset, |
| 4211 | ppc_elf_howto_table[r_type]->name); |
| 4212 | bfd_set_error (bfd_error_bad_value); |
| 4213 | return FALSE; |
| 4214 | } |
| 4215 | else |
| 4216 | { |
| 4217 | bfd_vma addend = 0; |
| 4218 | |
| 4219 | if (r_type == R_PPC_PLTREL24) |
| 4220 | { |
| 4221 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
| 4222 | if (info->shared) |
| 4223 | addend = rel->r_addend; |
| 4224 | } |
| 4225 | h->needs_plt = 1; |
| 4226 | if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) |
| 4227 | return FALSE; |
| 4228 | } |
| 4229 | break; |
| 4230 | |
| 4231 | /* The following relocations don't need to propagate the |
| 4232 | relocation if linking a shared object since they are |
| 4233 | section relative. */ |
| 4234 | case R_PPC_SECTOFF: |
| 4235 | case R_PPC_SECTOFF_LO: |
| 4236 | case R_PPC_SECTOFF_HI: |
| 4237 | case R_PPC_SECTOFF_HA: |
| 4238 | case R_PPC_DTPREL16: |
| 4239 | case R_PPC_DTPREL16_LO: |
| 4240 | case R_PPC_DTPREL16_HI: |
| 4241 | case R_PPC_DTPREL16_HA: |
| 4242 | case R_PPC_TOC16: |
| 4243 | break; |
| 4244 | |
| 4245 | case R_PPC_REL16: |
| 4246 | case R_PPC_REL16_LO: |
| 4247 | case R_PPC_REL16_HI: |
| 4248 | case R_PPC_REL16_HA: |
| 4249 | ppc_elf_tdata (abfd)->has_rel16 = 1; |
| 4250 | break; |
| 4251 | |
| 4252 | /* These are just markers. */ |
| 4253 | case R_PPC_TLS: |
| 4254 | case R_PPC_EMB_MRKREF: |
| 4255 | case R_PPC_NONE: |
| 4256 | case R_PPC_max: |
| 4257 | case R_PPC_RELAX: |
| 4258 | case R_PPC_RELAX_PLT: |
| 4259 | case R_PPC_RELAX_PLTREL24: |
| 4260 | break; |
| 4261 | |
| 4262 | /* These should only appear in dynamic objects. */ |
| 4263 | case R_PPC_COPY: |
| 4264 | case R_PPC_GLOB_DAT: |
| 4265 | case R_PPC_JMP_SLOT: |
| 4266 | case R_PPC_RELATIVE: |
| 4267 | case R_PPC_IRELATIVE: |
| 4268 | break; |
| 4269 | |
| 4270 | /* These aren't handled yet. We'll report an error later. */ |
| 4271 | case R_PPC_ADDR30: |
| 4272 | case R_PPC_EMB_RELSEC16: |
| 4273 | case R_PPC_EMB_RELST_LO: |
| 4274 | case R_PPC_EMB_RELST_HI: |
| 4275 | case R_PPC_EMB_RELST_HA: |
| 4276 | case R_PPC_EMB_BIT_FLD: |
| 4277 | break; |
| 4278 | |
| 4279 | /* This refers only to functions defined in the shared library. */ |
| 4280 | case R_PPC_LOCAL24PC: |
| 4281 | if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) |
| 4282 | { |
| 4283 | htab->plt_type = PLT_OLD; |
| 4284 | htab->old_bfd = abfd; |
| 4285 | } |
| 4286 | break; |
| 4287 | |
| 4288 | /* This relocation describes the C++ object vtable hierarchy. |
| 4289 | Reconstruct it for later use during GC. */ |
| 4290 | case R_PPC_GNU_VTINHERIT: |
| 4291 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 4292 | return FALSE; |
| 4293 | break; |
| 4294 | |
| 4295 | /* This relocation describes which C++ vtable entries are actually |
| 4296 | used. Record for later use during GC. */ |
| 4297 | case R_PPC_GNU_VTENTRY: |
| 4298 | BFD_ASSERT (h != NULL); |
| 4299 | if (h != NULL |
| 4300 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 4301 | return FALSE; |
| 4302 | break; |
| 4303 | |
| 4304 | /* We shouldn't really be seeing these. */ |
| 4305 | case R_PPC_TPREL32: |
| 4306 | case R_PPC_TPREL16: |
| 4307 | case R_PPC_TPREL16_LO: |
| 4308 | case R_PPC_TPREL16_HI: |
| 4309 | case R_PPC_TPREL16_HA: |
| 4310 | if (!info->executable) |
| 4311 | info->flags |= DF_STATIC_TLS; |
| 4312 | goto dodyn; |
| 4313 | |
| 4314 | /* Nor these. */ |
| 4315 | case R_PPC_DTPMOD32: |
| 4316 | case R_PPC_DTPREL32: |
| 4317 | goto dodyn; |
| 4318 | |
| 4319 | case R_PPC_REL32: |
| 4320 | if (h == NULL |
| 4321 | && got2 != NULL |
| 4322 | && (sec->flags & SEC_CODE) != 0 |
| 4323 | && info->shared |
| 4324 | && htab->plt_type == PLT_UNSET) |
| 4325 | { |
| 4326 | /* Old -fPIC gcc code has .long LCTOC1-LCFx just before |
| 4327 | the start of a function, which assembles to a REL32 |
| 4328 | reference to .got2. If we detect one of these, then |
| 4329 | force the old PLT layout because the linker cannot |
| 4330 | reliably deduce the GOT pointer value needed for |
| 4331 | PLT call stubs. */ |
| 4332 | asection *s; |
| 4333 | Elf_Internal_Sym *isym; |
| 4334 | |
| 4335 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4336 | abfd, r_symndx); |
| 4337 | if (isym == NULL) |
| 4338 | return FALSE; |
| 4339 | |
| 4340 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4341 | if (s == got2) |
| 4342 | { |
| 4343 | htab->plt_type = PLT_OLD; |
| 4344 | htab->old_bfd = abfd; |
| 4345 | } |
| 4346 | } |
| 4347 | if (h == NULL || h == htab->elf.hgot) |
| 4348 | break; |
| 4349 | /* fall through */ |
| 4350 | |
| 4351 | case R_PPC_ADDR32: |
| 4352 | case R_PPC_ADDR16: |
| 4353 | case R_PPC_ADDR16_LO: |
| 4354 | case R_PPC_ADDR16_HI: |
| 4355 | case R_PPC_ADDR16_HA: |
| 4356 | case R_PPC_UADDR32: |
| 4357 | case R_PPC_UADDR16: |
| 4358 | if (h != NULL && !info->shared) |
| 4359 | { |
| 4360 | /* We may need a plt entry if the symbol turns out to be |
| 4361 | a function defined in a dynamic object. */ |
| 4362 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4363 | return FALSE; |
| 4364 | |
| 4365 | /* We may need a copy reloc too. */ |
| 4366 | h->non_got_ref = 1; |
| 4367 | h->pointer_equality_needed = 1; |
| 4368 | } |
| 4369 | goto dodyn; |
| 4370 | |
| 4371 | case R_PPC_REL24: |
| 4372 | case R_PPC_REL14: |
| 4373 | case R_PPC_REL14_BRTAKEN: |
| 4374 | case R_PPC_REL14_BRNTAKEN: |
| 4375 | if (h == NULL) |
| 4376 | break; |
| 4377 | if (h == htab->elf.hgot) |
| 4378 | { |
| 4379 | if (htab->plt_type == PLT_UNSET) |
| 4380 | { |
| 4381 | htab->plt_type = PLT_OLD; |
| 4382 | htab->old_bfd = abfd; |
| 4383 | } |
| 4384 | break; |
| 4385 | } |
| 4386 | /* fall through */ |
| 4387 | |
| 4388 | case R_PPC_ADDR24: |
| 4389 | case R_PPC_ADDR14: |
| 4390 | case R_PPC_ADDR14_BRTAKEN: |
| 4391 | case R_PPC_ADDR14_BRNTAKEN: |
| 4392 | if (h != NULL && !info->shared) |
| 4393 | { |
| 4394 | /* We may need a plt entry if the symbol turns out to be |
| 4395 | a function defined in a dynamic object. */ |
| 4396 | h->needs_plt = 1; |
| 4397 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
| 4398 | return FALSE; |
| 4399 | break; |
| 4400 | } |
| 4401 | |
| 4402 | dodyn: |
| 4403 | /* If we are creating a shared library, and this is a reloc |
| 4404 | against a global symbol, or a non PC relative reloc |
| 4405 | against a local symbol, then we need to copy the reloc |
| 4406 | into the shared library. However, if we are linking with |
| 4407 | -Bsymbolic, we do not need to copy a reloc against a |
| 4408 | global symbol which is defined in an object we are |
| 4409 | including in the link (i.e., DEF_REGULAR is set). At |
| 4410 | this point we have not seen all the input files, so it is |
| 4411 | possible that DEF_REGULAR is not set now but will be set |
| 4412 | later (it is never cleared). In case of a weak definition, |
| 4413 | DEF_REGULAR may be cleared later by a strong definition in |
| 4414 | a shared library. We account for that possibility below by |
| 4415 | storing information in the dyn_relocs field of the hash |
| 4416 | table entry. A similar situation occurs when creating |
| 4417 | shared libraries and symbol visibility changes render the |
| 4418 | symbol local. |
| 4419 | |
| 4420 | If on the other hand, we are creating an executable, we |
| 4421 | may need to keep relocations for symbols satisfied by a |
| 4422 | dynamic library if we manage to avoid copy relocs for the |
| 4423 | symbol. */ |
| 4424 | if ((info->shared |
| 4425 | && (must_be_dyn_reloc (info, r_type) |
| 4426 | || (h != NULL |
| 4427 | && (! info->symbolic |
| 4428 | || h->root.type == bfd_link_hash_defweak |
| 4429 | || !h->def_regular)))) |
| 4430 | || (ELIMINATE_COPY_RELOCS |
| 4431 | && !info->shared |
| 4432 | && h != NULL |
| 4433 | && (h->root.type == bfd_link_hash_defweak |
| 4434 | || !h->def_regular))) |
| 4435 | { |
| 4436 | #ifdef DEBUG |
| 4437 | fprintf (stderr, |
| 4438 | "ppc_elf_check_relocs needs to " |
| 4439 | "create relocation for %s\n", |
| 4440 | (h && h->root.root.string |
| 4441 | ? h->root.root.string : "<unknown>")); |
| 4442 | #endif |
| 4443 | if (sreloc == NULL) |
| 4444 | { |
| 4445 | if (htab->elf.dynobj == NULL) |
| 4446 | htab->elf.dynobj = abfd; |
| 4447 | |
| 4448 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 4449 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); |
| 4450 | |
| 4451 | if (sreloc == NULL) |
| 4452 | return FALSE; |
| 4453 | } |
| 4454 | |
| 4455 | /* If this is a global symbol, we count the number of |
| 4456 | relocations we need for this symbol. */ |
| 4457 | if (h != NULL) |
| 4458 | { |
| 4459 | struct elf_dyn_relocs *p; |
| 4460 | struct elf_dyn_relocs **rel_head; |
| 4461 | |
| 4462 | rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; |
| 4463 | p = *rel_head; |
| 4464 | if (p == NULL || p->sec != sec) |
| 4465 | { |
| 4466 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 4467 | if (p == NULL) |
| 4468 | return FALSE; |
| 4469 | p->next = *rel_head; |
| 4470 | *rel_head = p; |
| 4471 | p->sec = sec; |
| 4472 | p->count = 0; |
| 4473 | p->pc_count = 0; |
| 4474 | } |
| 4475 | p->count += 1; |
| 4476 | if (!must_be_dyn_reloc (info, r_type)) |
| 4477 | p->pc_count += 1; |
| 4478 | } |
| 4479 | else |
| 4480 | { |
| 4481 | /* Track dynamic relocs needed for local syms too. |
| 4482 | We really need local syms available to do this |
| 4483 | easily. Oh well. */ |
| 4484 | struct ppc_dyn_relocs *p; |
| 4485 | struct ppc_dyn_relocs **rel_head; |
| 4486 | bfd_boolean is_ifunc; |
| 4487 | asection *s; |
| 4488 | void *vpp; |
| 4489 | Elf_Internal_Sym *isym; |
| 4490 | |
| 4491 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4492 | abfd, r_symndx); |
| 4493 | if (isym == NULL) |
| 4494 | return FALSE; |
| 4495 | |
| 4496 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4497 | if (s == NULL) |
| 4498 | s = sec; |
| 4499 | |
| 4500 | vpp = &elf_section_data (s)->local_dynrel; |
| 4501 | rel_head = (struct ppc_dyn_relocs **) vpp; |
| 4502 | is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; |
| 4503 | p = *rel_head; |
| 4504 | if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) |
| 4505 | p = p->next; |
| 4506 | if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) |
| 4507 | { |
| 4508 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 4509 | if (p == NULL) |
| 4510 | return FALSE; |
| 4511 | p->next = *rel_head; |
| 4512 | *rel_head = p; |
| 4513 | p->sec = sec; |
| 4514 | p->ifunc = is_ifunc; |
| 4515 | p->count = 0; |
| 4516 | } |
| 4517 | p->count += 1; |
| 4518 | } |
| 4519 | } |
| 4520 | |
| 4521 | break; |
| 4522 | } |
| 4523 | } |
| 4524 | |
| 4525 | return TRUE; |
| 4526 | } |
| 4527 | \f |
| 4528 | |
| 4529 | /* Merge object attributes from IBFD into OBFD. Raise an error if |
| 4530 | there are conflicting attributes. */ |
| 4531 | static bfd_boolean |
| 4532 | ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) |
| 4533 | { |
| 4534 | obj_attribute *in_attr, *in_attrs; |
| 4535 | obj_attribute *out_attr, *out_attrs; |
| 4536 | |
| 4537 | if (!elf_known_obj_attributes_proc (obfd)[0].i) |
| 4538 | { |
| 4539 | /* This is the first object. Copy the attributes. */ |
| 4540 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 4541 | |
| 4542 | /* Use the Tag_null value to indicate the attributes have been |
| 4543 | initialized. */ |
| 4544 | elf_known_obj_attributes_proc (obfd)[0].i = 1; |
| 4545 | |
| 4546 | return TRUE; |
| 4547 | } |
| 4548 | |
| 4549 | in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
| 4550 | out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; |
| 4551 | |
| 4552 | /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge |
| 4553 | non-conflicting ones. */ |
| 4554 | in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; |
| 4555 | out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; |
| 4556 | if (in_attr->i != out_attr->i) |
| 4557 | { |
| 4558 | out_attr->type = 1; |
| 4559 | if (out_attr->i == 0) |
| 4560 | out_attr->i = in_attr->i; |
| 4561 | else if (in_attr->i == 0) |
| 4562 | ; |
| 4563 | else if (out_attr->i == 1 && in_attr->i == 2) |
| 4564 | _bfd_error_handler |
| 4565 | (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); |
| 4566 | else if (out_attr->i == 1 && in_attr->i == 3) |
| 4567 | _bfd_error_handler |
| 4568 | (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), |
| 4569 | obfd, ibfd); |
| 4570 | else if (out_attr->i == 3 && in_attr->i == 1) |
| 4571 | _bfd_error_handler |
| 4572 | (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), |
| 4573 | ibfd, obfd); |
| 4574 | else if (out_attr->i == 3 && in_attr->i == 2) |
| 4575 | _bfd_error_handler |
| 4576 | (_("Warning: %B uses soft float, %B uses single-precision hard float"), |
| 4577 | ibfd, obfd); |
| 4578 | else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) |
| 4579 | _bfd_error_handler |
| 4580 | (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); |
| 4581 | else if (in_attr->i > 3) |
| 4582 | _bfd_error_handler |
| 4583 | (_("Warning: %B uses unknown floating point ABI %d"), ibfd, |
| 4584 | in_attr->i); |
| 4585 | else |
| 4586 | _bfd_error_handler |
| 4587 | (_("Warning: %B uses unknown floating point ABI %d"), obfd, |
| 4588 | out_attr->i); |
| 4589 | } |
| 4590 | |
| 4591 | /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and |
| 4592 | merge non-conflicting ones. */ |
| 4593 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; |
| 4594 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; |
| 4595 | if (in_attr->i != out_attr->i) |
| 4596 | { |
| 4597 | const char *in_abi = NULL, *out_abi = NULL; |
| 4598 | |
| 4599 | switch (in_attr->i) |
| 4600 | { |
| 4601 | case 1: in_abi = "generic"; break; |
| 4602 | case 2: in_abi = "AltiVec"; break; |
| 4603 | case 3: in_abi = "SPE"; break; |
| 4604 | } |
| 4605 | |
| 4606 | switch (out_attr->i) |
| 4607 | { |
| 4608 | case 1: out_abi = "generic"; break; |
| 4609 | case 2: out_abi = "AltiVec"; break; |
| 4610 | case 3: out_abi = "SPE"; break; |
| 4611 | } |
| 4612 | |
| 4613 | out_attr->type = 1; |
| 4614 | if (out_attr->i == 0) |
| 4615 | out_attr->i = in_attr->i; |
| 4616 | else if (in_attr->i == 0) |
| 4617 | ; |
| 4618 | /* For now, allow generic to transition to AltiVec or SPE |
| 4619 | without a warning. If GCC marked files with their stack |
| 4620 | alignment and used don't-care markings for files which are |
| 4621 | not affected by the vector ABI, we could warn about this |
| 4622 | case too. */ |
| 4623 | else if (out_attr->i == 1) |
| 4624 | out_attr->i = in_attr->i; |
| 4625 | else if (in_attr->i == 1) |
| 4626 | ; |
| 4627 | else if (in_abi == NULL) |
| 4628 | _bfd_error_handler |
| 4629 | (_("Warning: %B uses unknown vector ABI %d"), ibfd, |
| 4630 | in_attr->i); |
| 4631 | else if (out_abi == NULL) |
| 4632 | _bfd_error_handler |
| 4633 | (_("Warning: %B uses unknown vector ABI %d"), obfd, |
| 4634 | in_attr->i); |
| 4635 | else |
| 4636 | _bfd_error_handler |
| 4637 | (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), |
| 4638 | ibfd, obfd, in_abi, out_abi); |
| 4639 | } |
| 4640 | |
| 4641 | /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes |
| 4642 | and merge non-conflicting ones. */ |
| 4643 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; |
| 4644 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; |
| 4645 | if (in_attr->i != out_attr->i) |
| 4646 | { |
| 4647 | out_attr->type = 1; |
| 4648 | if (out_attr->i == 0) |
| 4649 | out_attr->i = in_attr->i; |
| 4650 | else if (in_attr->i == 0) |
| 4651 | ; |
| 4652 | else if (out_attr->i == 1 && in_attr->i == 2) |
| 4653 | _bfd_error_handler |
| 4654 | (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); |
| 4655 | else if (out_attr->i == 2 && in_attr->i == 1) |
| 4656 | _bfd_error_handler |
| 4657 | (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); |
| 4658 | else if (in_attr->i > 2) |
| 4659 | _bfd_error_handler |
| 4660 | (_("Warning: %B uses unknown small structure return convention %d"), ibfd, |
| 4661 | in_attr->i); |
| 4662 | else |
| 4663 | _bfd_error_handler |
| 4664 | (_("Warning: %B uses unknown small structure return convention %d"), obfd, |
| 4665 | out_attr->i); |
| 4666 | } |
| 4667 | |
| 4668 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| 4669 | _bfd_elf_merge_object_attributes (ibfd, obfd); |
| 4670 | |
| 4671 | return TRUE; |
| 4672 | } |
| 4673 | |
| 4674 | /* Merge backend specific data from an object file to the output |
| 4675 | object file when linking. */ |
| 4676 | |
| 4677 | static bfd_boolean |
| 4678 | ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4679 | { |
| 4680 | flagword old_flags; |
| 4681 | flagword new_flags; |
| 4682 | bfd_boolean error; |
| 4683 | |
| 4684 | if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) |
| 4685 | return TRUE; |
| 4686 | |
| 4687 | /* Check if we have the same endianness. */ |
| 4688 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 4689 | return FALSE; |
| 4690 | |
| 4691 | if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) |
| 4692 | return FALSE; |
| 4693 | |
| 4694 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 4695 | old_flags = elf_elfheader (obfd)->e_flags; |
| 4696 | if (!elf_flags_init (obfd)) |
| 4697 | { |
| 4698 | /* First call, no flags set. */ |
| 4699 | elf_flags_init (obfd) = TRUE; |
| 4700 | elf_elfheader (obfd)->e_flags = new_flags; |
| 4701 | } |
| 4702 | |
| 4703 | /* Compatible flags are ok. */ |
| 4704 | else if (new_flags == old_flags) |
| 4705 | ; |
| 4706 | |
| 4707 | /* Incompatible flags. */ |
| 4708 | else |
| 4709 | { |
| 4710 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib |
| 4711 | to be linked with either. */ |
| 4712 | error = FALSE; |
| 4713 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 4714 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 4715 | { |
| 4716 | error = TRUE; |
| 4717 | (*_bfd_error_handler) |
| 4718 | (_("%B: compiled with -mrelocatable and linked with " |
| 4719 | "modules compiled normally"), ibfd); |
| 4720 | } |
| 4721 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 4722 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 4723 | { |
| 4724 | error = TRUE; |
| 4725 | (*_bfd_error_handler) |
| 4726 | (_("%B: compiled normally and linked with " |
| 4727 | "modules compiled with -mrelocatable"), ibfd); |
| 4728 | } |
| 4729 | |
| 4730 | /* The output is -mrelocatable-lib iff both the input files are. */ |
| 4731 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) |
| 4732 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 4733 | |
| 4734 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, |
| 4735 | but each input file is either -mrelocatable or -mrelocatable-lib. */ |
| 4736 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) |
| 4737 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) |
| 4738 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) |
| 4739 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; |
| 4740 | |
| 4741 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if |
| 4742 | any module uses it. */ |
| 4743 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 4744 | |
| 4745 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 4746 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 4747 | |
| 4748 | /* Warn about any other mismatches. */ |
| 4749 | if (new_flags != old_flags) |
| 4750 | { |
| 4751 | error = TRUE; |
| 4752 | (*_bfd_error_handler) |
| 4753 | (_("%B: uses different e_flags (0x%lx) fields " |
| 4754 | "than previous modules (0x%lx)"), |
| 4755 | ibfd, (long) new_flags, (long) old_flags); |
| 4756 | } |
| 4757 | |
| 4758 | if (error) |
| 4759 | { |
| 4760 | bfd_set_error (bfd_error_bad_value); |
| 4761 | return FALSE; |
| 4762 | } |
| 4763 | } |
| 4764 | |
| 4765 | return TRUE; |
| 4766 | } |
| 4767 | |
| 4768 | static void |
| 4769 | ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents, |
| 4770 | bfd_vma offset, bfd_vma relocation, |
| 4771 | split16_format_type split16_format) |
| 4772 | |
| 4773 | { |
| 4774 | bfd_vma insn, top5, bottom11; |
| 4775 | |
| 4776 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 4777 | top5 = relocation >> 11; |
| 4778 | top5 = top5 << (split16_format == split16a_type ? 20 : 16); |
| 4779 | bottom11 = relocation & 0x7ff; |
| 4780 | insn |= top5; |
| 4781 | insn |= bottom11; |
| 4782 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 4783 | } |
| 4784 | |
| 4785 | \f |
| 4786 | /* Choose which PLT scheme to use, and set .plt flags appropriately. |
| 4787 | Returns -1 on error, 0 for old PLT, 1 for new PLT. */ |
| 4788 | int |
| 4789 | ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4790 | struct bfd_link_info *info, |
| 4791 | enum ppc_elf_plt_type plt_style, |
| 4792 | int emit_stub_syms) |
| 4793 | { |
| 4794 | struct ppc_elf_link_hash_table *htab; |
| 4795 | flagword flags; |
| 4796 | |
| 4797 | htab = ppc_elf_hash_table (info); |
| 4798 | |
| 4799 | htab->emit_stub_syms = emit_stub_syms; |
| 4800 | |
| 4801 | if (htab->plt_type == PLT_UNSET) |
| 4802 | { |
| 4803 | struct elf_link_hash_entry *h; |
| 4804 | |
| 4805 | if (plt_style == PLT_OLD) |
| 4806 | htab->plt_type = PLT_OLD; |
| 4807 | else if (info->shared |
| 4808 | && htab->elf.dynamic_sections_created |
| 4809 | && (h = elf_link_hash_lookup (&htab->elf, "_mcount", |
| 4810 | FALSE, FALSE, TRUE)) != NULL |
| 4811 | && (h->type == STT_FUNC |
| 4812 | || h->needs_plt) |
| 4813 | && h->ref_regular |
| 4814 | && !(SYMBOL_CALLS_LOCAL (info, h) |
| 4815 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 4816 | && h->root.type == bfd_link_hash_undefweak))) |
| 4817 | { |
| 4818 | /* Profiling of shared libs (and pies) is not supported with |
| 4819 | secure plt, because ppc32 does profiling before a |
| 4820 | function prologue and a secure plt pic call stubs needs |
| 4821 | r30 to be set up. */ |
| 4822 | htab->plt_type = PLT_OLD; |
| 4823 | } |
| 4824 | else |
| 4825 | { |
| 4826 | bfd *ibfd; |
| 4827 | enum ppc_elf_plt_type plt_type = plt_style; |
| 4828 | |
| 4829 | /* Look through the reloc flags left by ppc_elf_check_relocs. |
| 4830 | Use the old style bss plt if a file makes plt calls |
| 4831 | without using the new relocs, and if ld isn't given |
| 4832 | --secure-plt and we never see REL16 relocs. */ |
| 4833 | if (plt_type == PLT_UNSET) |
| 4834 | plt_type = PLT_OLD; |
| 4835 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 4836 | if (is_ppc_elf (ibfd)) |
| 4837 | { |
| 4838 | if (ppc_elf_tdata (ibfd)->has_rel16) |
| 4839 | plt_type = PLT_NEW; |
| 4840 | else if (ppc_elf_tdata (ibfd)->makes_plt_call) |
| 4841 | { |
| 4842 | plt_type = PLT_OLD; |
| 4843 | htab->old_bfd = ibfd; |
| 4844 | break; |
| 4845 | } |
| 4846 | } |
| 4847 | htab->plt_type = plt_type; |
| 4848 | } |
| 4849 | } |
| 4850 | if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW) |
| 4851 | { |
| 4852 | if (htab->old_bfd != NULL) |
| 4853 | info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), |
| 4854 | htab->old_bfd); |
| 4855 | else |
| 4856 | info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); |
| 4857 | } |
| 4858 | |
| 4859 | BFD_ASSERT (htab->plt_type != PLT_VXWORKS); |
| 4860 | |
| 4861 | if (htab->plt_type == PLT_NEW) |
| 4862 | { |
| 4863 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 4864 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 4865 | |
| 4866 | /* The new PLT is a loaded section. */ |
| 4867 | if (htab->plt != NULL |
| 4868 | && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) |
| 4869 | return -1; |
| 4870 | |
| 4871 | /* The new GOT is not executable. */ |
| 4872 | if (htab->got != NULL |
| 4873 | && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) |
| 4874 | return -1; |
| 4875 | } |
| 4876 | else |
| 4877 | { |
| 4878 | /* Stop an unused .glink section from affecting .text alignment. */ |
| 4879 | if (htab->glink != NULL |
| 4880 | && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) |
| 4881 | return -1; |
| 4882 | } |
| 4883 | return htab->plt_type == PLT_NEW; |
| 4884 | } |
| 4885 | \f |
| 4886 | /* Return the section that should be marked against GC for a given |
| 4887 | relocation. */ |
| 4888 | |
| 4889 | static asection * |
| 4890 | ppc_elf_gc_mark_hook (asection *sec, |
| 4891 | struct bfd_link_info *info, |
| 4892 | Elf_Internal_Rela *rel, |
| 4893 | struct elf_link_hash_entry *h, |
| 4894 | Elf_Internal_Sym *sym) |
| 4895 | { |
| 4896 | if (h != NULL) |
| 4897 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4898 | { |
| 4899 | case R_PPC_GNU_VTINHERIT: |
| 4900 | case R_PPC_GNU_VTENTRY: |
| 4901 | return NULL; |
| 4902 | } |
| 4903 | |
| 4904 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 4905 | } |
| 4906 | |
| 4907 | /* Update the got, plt and dynamic reloc reference counts for the |
| 4908 | section being removed. */ |
| 4909 | |
| 4910 | static bfd_boolean |
| 4911 | ppc_elf_gc_sweep_hook (bfd *abfd, |
| 4912 | struct bfd_link_info *info, |
| 4913 | asection *sec, |
| 4914 | const Elf_Internal_Rela *relocs) |
| 4915 | { |
| 4916 | struct ppc_elf_link_hash_table *htab; |
| 4917 | Elf_Internal_Shdr *symtab_hdr; |
| 4918 | struct elf_link_hash_entry **sym_hashes; |
| 4919 | bfd_signed_vma *local_got_refcounts; |
| 4920 | const Elf_Internal_Rela *rel, *relend; |
| 4921 | asection *got2; |
| 4922 | |
| 4923 | if (info->relocatable) |
| 4924 | return TRUE; |
| 4925 | |
| 4926 | if ((sec->flags & SEC_ALLOC) == 0) |
| 4927 | return TRUE; |
| 4928 | |
| 4929 | elf_section_data (sec)->local_dynrel = NULL; |
| 4930 | |
| 4931 | htab = ppc_elf_hash_table (info); |
| 4932 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 4933 | sym_hashes = elf_sym_hashes (abfd); |
| 4934 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 4935 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 4936 | |
| 4937 | relend = relocs + sec->reloc_count; |
| 4938 | for (rel = relocs; rel < relend; rel++) |
| 4939 | { |
| 4940 | unsigned long r_symndx; |
| 4941 | enum elf_ppc_reloc_type r_type; |
| 4942 | struct elf_link_hash_entry *h = NULL; |
| 4943 | |
| 4944 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4945 | if (r_symndx >= symtab_hdr->sh_info) |
| 4946 | { |
| 4947 | struct elf_dyn_relocs **pp, *p; |
| 4948 | struct ppc_elf_link_hash_entry *eh; |
| 4949 | |
| 4950 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4951 | while (h->root.type == bfd_link_hash_indirect |
| 4952 | || h->root.type == bfd_link_hash_warning) |
| 4953 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4954 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 4955 | |
| 4956 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 4957 | if (p->sec == sec) |
| 4958 | { |
| 4959 | /* Everything must go for SEC. */ |
| 4960 | *pp = p->next; |
| 4961 | break; |
| 4962 | } |
| 4963 | } |
| 4964 | |
| 4965 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4966 | if (!htab->is_vxworks |
| 4967 | && h == NULL |
| 4968 | && local_got_refcounts != NULL |
| 4969 | && (!info->shared |
| 4970 | || is_branch_reloc (r_type))) |
| 4971 | { |
| 4972 | struct plt_entry **local_plt = (struct plt_entry **) |
| 4973 | (local_got_refcounts + symtab_hdr->sh_info); |
| 4974 | char *local_got_tls_masks = (char *) |
| 4975 | (local_plt + symtab_hdr->sh_info); |
| 4976 | if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) |
| 4977 | { |
| 4978 | struct plt_entry **ifunc = local_plt + r_symndx; |
| 4979 | bfd_vma addend = 0; |
| 4980 | struct plt_entry *ent; |
| 4981 | |
| 4982 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 4983 | addend = rel->r_addend; |
| 4984 | ent = find_plt_ent (ifunc, got2, addend); |
| 4985 | if (ent->plt.refcount > 0) |
| 4986 | ent->plt.refcount -= 1; |
| 4987 | continue; |
| 4988 | } |
| 4989 | } |
| 4990 | |
| 4991 | switch (r_type) |
| 4992 | { |
| 4993 | case R_PPC_GOT_TLSLD16: |
| 4994 | case R_PPC_GOT_TLSLD16_LO: |
| 4995 | case R_PPC_GOT_TLSLD16_HI: |
| 4996 | case R_PPC_GOT_TLSLD16_HA: |
| 4997 | case R_PPC_GOT_TLSGD16: |
| 4998 | case R_PPC_GOT_TLSGD16_LO: |
| 4999 | case R_PPC_GOT_TLSGD16_HI: |
| 5000 | case R_PPC_GOT_TLSGD16_HA: |
| 5001 | case R_PPC_GOT_TPREL16: |
| 5002 | case R_PPC_GOT_TPREL16_LO: |
| 5003 | case R_PPC_GOT_TPREL16_HI: |
| 5004 | case R_PPC_GOT_TPREL16_HA: |
| 5005 | case R_PPC_GOT_DTPREL16: |
| 5006 | case R_PPC_GOT_DTPREL16_LO: |
| 5007 | case R_PPC_GOT_DTPREL16_HI: |
| 5008 | case R_PPC_GOT_DTPREL16_HA: |
| 5009 | case R_PPC_GOT16: |
| 5010 | case R_PPC_GOT16_LO: |
| 5011 | case R_PPC_GOT16_HI: |
| 5012 | case R_PPC_GOT16_HA: |
| 5013 | if (h != NULL) |
| 5014 | { |
| 5015 | if (h->got.refcount > 0) |
| 5016 | h->got.refcount--; |
| 5017 | if (!info->shared) |
| 5018 | { |
| 5019 | struct plt_entry *ent; |
| 5020 | |
| 5021 | ent = find_plt_ent (&h->plt.plist, NULL, 0); |
| 5022 | if (ent != NULL && ent->plt.refcount > 0) |
| 5023 | ent->plt.refcount -= 1; |
| 5024 | } |
| 5025 | } |
| 5026 | else if (local_got_refcounts != NULL) |
| 5027 | { |
| 5028 | if (local_got_refcounts[r_symndx] > 0) |
| 5029 | local_got_refcounts[r_symndx]--; |
| 5030 | } |
| 5031 | break; |
| 5032 | |
| 5033 | case R_PPC_REL24: |
| 5034 | case R_PPC_REL14: |
| 5035 | case R_PPC_REL14_BRTAKEN: |
| 5036 | case R_PPC_REL14_BRNTAKEN: |
| 5037 | case R_PPC_REL32: |
| 5038 | if (h == NULL || h == htab->elf.hgot) |
| 5039 | break; |
| 5040 | /* Fall thru */ |
| 5041 | |
| 5042 | case R_PPC_ADDR32: |
| 5043 | case R_PPC_ADDR24: |
| 5044 | case R_PPC_ADDR16: |
| 5045 | case R_PPC_ADDR16_LO: |
| 5046 | case R_PPC_ADDR16_HI: |
| 5047 | case R_PPC_ADDR16_HA: |
| 5048 | case R_PPC_ADDR14: |
| 5049 | case R_PPC_ADDR14_BRTAKEN: |
| 5050 | case R_PPC_ADDR14_BRNTAKEN: |
| 5051 | case R_PPC_UADDR32: |
| 5052 | case R_PPC_UADDR16: |
| 5053 | if (info->shared) |
| 5054 | break; |
| 5055 | |
| 5056 | case R_PPC_PLT32: |
| 5057 | case R_PPC_PLTREL24: |
| 5058 | case R_PPC_PLTREL32: |
| 5059 | case R_PPC_PLT16_LO: |
| 5060 | case R_PPC_PLT16_HI: |
| 5061 | case R_PPC_PLT16_HA: |
| 5062 | if (h != NULL) |
| 5063 | { |
| 5064 | bfd_vma addend = 0; |
| 5065 | struct plt_entry *ent; |
| 5066 | |
| 5067 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 5068 | addend = rel->r_addend; |
| 5069 | ent = find_plt_ent (&h->plt.plist, got2, addend); |
| 5070 | if (ent != NULL && ent->plt.refcount > 0) |
| 5071 | ent->plt.refcount -= 1; |
| 5072 | } |
| 5073 | break; |
| 5074 | |
| 5075 | default: |
| 5076 | break; |
| 5077 | } |
| 5078 | } |
| 5079 | return TRUE; |
| 5080 | } |
| 5081 | \f |
| 5082 | /* Set plt output section type, htab->tls_get_addr, and call the |
| 5083 | generic ELF tls_setup function. */ |
| 5084 | |
| 5085 | asection * |
| 5086 | ppc_elf_tls_setup (bfd *obfd, |
| 5087 | struct bfd_link_info *info, |
| 5088 | int no_tls_get_addr_opt) |
| 5089 | { |
| 5090 | struct ppc_elf_link_hash_table *htab; |
| 5091 | |
| 5092 | htab = ppc_elf_hash_table (info); |
| 5093 | htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 5094 | FALSE, FALSE, TRUE); |
| 5095 | if (!no_tls_get_addr_opt) |
| 5096 | { |
| 5097 | struct elf_link_hash_entry *opt, *tga; |
| 5098 | opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", |
| 5099 | FALSE, FALSE, TRUE); |
| 5100 | if (opt != NULL |
| 5101 | && (opt->root.type == bfd_link_hash_defined |
| 5102 | || opt->root.type == bfd_link_hash_defweak)) |
| 5103 | { |
| 5104 | /* If glibc supports an optimized __tls_get_addr call stub, |
| 5105 | signalled by the presence of __tls_get_addr_opt, and we'll |
| 5106 | be calling __tls_get_addr via a plt call stub, then |
| 5107 | make __tls_get_addr point to __tls_get_addr_opt. */ |
| 5108 | tga = htab->tls_get_addr; |
| 5109 | if (htab->elf.dynamic_sections_created |
| 5110 | && tga != NULL |
| 5111 | && (tga->type == STT_FUNC |
| 5112 | || tga->needs_plt) |
| 5113 | && !(SYMBOL_CALLS_LOCAL (info, tga) |
| 5114 | || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT |
| 5115 | && tga->root.type == bfd_link_hash_undefweak))) |
| 5116 | { |
| 5117 | struct plt_entry *ent; |
| 5118 | for (ent = tga->plt.plist; ent != NULL; ent = ent->next) |
| 5119 | if (ent->plt.refcount > 0) |
| 5120 | break; |
| 5121 | if (ent != NULL) |
| 5122 | { |
| 5123 | tga->root.type = bfd_link_hash_indirect; |
| 5124 | tga->root.u.i.link = &opt->root; |
| 5125 | ppc_elf_copy_indirect_symbol (info, opt, tga); |
| 5126 | if (opt->dynindx != -1) |
| 5127 | { |
| 5128 | /* Use __tls_get_addr_opt in dynamic relocations. */ |
| 5129 | opt->dynindx = -1; |
| 5130 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 5131 | opt->dynstr_index); |
| 5132 | if (!bfd_elf_link_record_dynamic_symbol (info, opt)) |
| 5133 | return FALSE; |
| 5134 | } |
| 5135 | htab->tls_get_addr = opt; |
| 5136 | } |
| 5137 | } |
| 5138 | } |
| 5139 | else |
| 5140 | no_tls_get_addr_opt = TRUE; |
| 5141 | } |
| 5142 | htab->no_tls_get_addr_opt = no_tls_get_addr_opt; |
| 5143 | if (htab->plt_type == PLT_NEW |
| 5144 | && htab->plt != NULL |
| 5145 | && htab->plt->output_section != NULL) |
| 5146 | { |
| 5147 | elf_section_type (htab->plt->output_section) = SHT_PROGBITS; |
| 5148 | elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; |
| 5149 | } |
| 5150 | |
| 5151 | return _bfd_elf_tls_setup (obfd, info); |
| 5152 | } |
| 5153 | |
| 5154 | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
| 5155 | HASH. */ |
| 5156 | |
| 5157 | static bfd_boolean |
| 5158 | branch_reloc_hash_match (const bfd *ibfd, |
| 5159 | const Elf_Internal_Rela *rel, |
| 5160 | const struct elf_link_hash_entry *hash) |
| 5161 | { |
| 5162 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 5163 | enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); |
| 5164 | unsigned int r_symndx = ELF32_R_SYM (rel->r_info); |
| 5165 | |
| 5166 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
| 5167 | { |
| 5168 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 5169 | struct elf_link_hash_entry *h; |
| 5170 | |
| 5171 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5172 | while (h->root.type == bfd_link_hash_indirect |
| 5173 | || h->root.type == bfd_link_hash_warning) |
| 5174 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5175 | if (h == hash) |
| 5176 | return TRUE; |
| 5177 | } |
| 5178 | return FALSE; |
| 5179 | } |
| 5180 | |
| 5181 | /* Run through all the TLS relocs looking for optimization |
| 5182 | opportunities. */ |
| 5183 | |
| 5184 | bfd_boolean |
| 5185 | ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, |
| 5186 | struct bfd_link_info *info) |
| 5187 | { |
| 5188 | bfd *ibfd; |
| 5189 | asection *sec; |
| 5190 | struct ppc_elf_link_hash_table *htab; |
| 5191 | int pass; |
| 5192 | |
| 5193 | if (info->relocatable || !info->executable) |
| 5194 | return TRUE; |
| 5195 | |
| 5196 | htab = ppc_elf_hash_table (info); |
| 5197 | if (htab == NULL) |
| 5198 | return FALSE; |
| 5199 | |
| 5200 | /* Make two passes through the relocs. First time check that tls |
| 5201 | relocs involved in setting up a tls_get_addr call are indeed |
| 5202 | followed by such a call. If they are not, don't do any tls |
| 5203 | optimization. On the second pass twiddle tls_mask flags to |
| 5204 | notify relocate_section that optimization can be done, and |
| 5205 | adjust got and plt refcounts. */ |
| 5206 | for (pass = 0; pass < 2; ++pass) |
| 5207 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 5208 | { |
| 5209 | Elf_Internal_Sym *locsyms = NULL; |
| 5210 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 5211 | asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); |
| 5212 | |
| 5213 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 5214 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| 5215 | { |
| 5216 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 5217 | int expecting_tls_get_addr = 0; |
| 5218 | |
| 5219 | /* Read the relocations. */ |
| 5220 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 5221 | info->keep_memory); |
| 5222 | if (relstart == NULL) |
| 5223 | return FALSE; |
| 5224 | |
| 5225 | relend = relstart + sec->reloc_count; |
| 5226 | for (rel = relstart; rel < relend; rel++) |
| 5227 | { |
| 5228 | enum elf_ppc_reloc_type r_type; |
| 5229 | unsigned long r_symndx; |
| 5230 | struct elf_link_hash_entry *h = NULL; |
| 5231 | char *tls_mask; |
| 5232 | char tls_set, tls_clear; |
| 5233 | bfd_boolean is_local; |
| 5234 | bfd_signed_vma *got_count; |
| 5235 | |
| 5236 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 5237 | if (r_symndx >= symtab_hdr->sh_info) |
| 5238 | { |
| 5239 | struct elf_link_hash_entry **sym_hashes; |
| 5240 | |
| 5241 | sym_hashes = elf_sym_hashes (ibfd); |
| 5242 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5243 | while (h->root.type == bfd_link_hash_indirect |
| 5244 | || h->root.type == bfd_link_hash_warning) |
| 5245 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5246 | } |
| 5247 | |
| 5248 | is_local = FALSE; |
| 5249 | if (h == NULL |
| 5250 | || !h->def_dynamic) |
| 5251 | is_local = TRUE; |
| 5252 | |
| 5253 | r_type = ELF32_R_TYPE (rel->r_info); |
| 5254 | /* If this section has old-style __tls_get_addr calls |
| 5255 | without marker relocs, then check that each |
| 5256 | __tls_get_addr call reloc is preceded by a reloc |
| 5257 | that conceivably belongs to the __tls_get_addr arg |
| 5258 | setup insn. If we don't find matching arg setup |
| 5259 | relocs, don't do any tls optimization. */ |
| 5260 | if (pass == 0 |
| 5261 | && sec->has_tls_get_addr_call |
| 5262 | && h != NULL |
| 5263 | && h == htab->tls_get_addr |
| 5264 | && !expecting_tls_get_addr |
| 5265 | && is_branch_reloc (r_type)) |
| 5266 | { |
| 5267 | info->callbacks->minfo ("%H __tls_get_addr lost arg, " |
| 5268 | "TLS optimization disabled\n", |
| 5269 | ibfd, sec, rel->r_offset); |
| 5270 | if (elf_section_data (sec)->relocs != relstart) |
| 5271 | free (relstart); |
| 5272 | return TRUE; |
| 5273 | } |
| 5274 | |
| 5275 | expecting_tls_get_addr = 0; |
| 5276 | switch (r_type) |
| 5277 | { |
| 5278 | case R_PPC_GOT_TLSLD16: |
| 5279 | case R_PPC_GOT_TLSLD16_LO: |
| 5280 | expecting_tls_get_addr = 1; |
| 5281 | /* Fall thru */ |
| 5282 | |
| 5283 | case R_PPC_GOT_TLSLD16_HI: |
| 5284 | case R_PPC_GOT_TLSLD16_HA: |
| 5285 | /* These relocs should never be against a symbol |
| 5286 | defined in a shared lib. Leave them alone if |
| 5287 | that turns out to be the case. */ |
| 5288 | if (!is_local) |
| 5289 | continue; |
| 5290 | |
| 5291 | /* LD -> LE */ |
| 5292 | tls_set = 0; |
| 5293 | tls_clear = TLS_LD; |
| 5294 | break; |
| 5295 | |
| 5296 | case R_PPC_GOT_TLSGD16: |
| 5297 | case R_PPC_GOT_TLSGD16_LO: |
| 5298 | expecting_tls_get_addr = 1; |
| 5299 | /* Fall thru */ |
| 5300 | |
| 5301 | case R_PPC_GOT_TLSGD16_HI: |
| 5302 | case R_PPC_GOT_TLSGD16_HA: |
| 5303 | if (is_local) |
| 5304 | /* GD -> LE */ |
| 5305 | tls_set = 0; |
| 5306 | else |
| 5307 | /* GD -> IE */ |
| 5308 | tls_set = TLS_TLS | TLS_TPRELGD; |
| 5309 | tls_clear = TLS_GD; |
| 5310 | break; |
| 5311 | |
| 5312 | case R_PPC_GOT_TPREL16: |
| 5313 | case R_PPC_GOT_TPREL16_LO: |
| 5314 | case R_PPC_GOT_TPREL16_HI: |
| 5315 | case R_PPC_GOT_TPREL16_HA: |
| 5316 | if (is_local) |
| 5317 | { |
| 5318 | /* IE -> LE */ |
| 5319 | tls_set = 0; |
| 5320 | tls_clear = TLS_TPREL; |
| 5321 | break; |
| 5322 | } |
| 5323 | else |
| 5324 | continue; |
| 5325 | |
| 5326 | case R_PPC_TLSGD: |
| 5327 | case R_PPC_TLSLD: |
| 5328 | expecting_tls_get_addr = 2; |
| 5329 | tls_set = 0; |
| 5330 | tls_clear = 0; |
| 5331 | break; |
| 5332 | |
| 5333 | default: |
| 5334 | continue; |
| 5335 | } |
| 5336 | |
| 5337 | if (pass == 0) |
| 5338 | { |
| 5339 | if (!expecting_tls_get_addr |
| 5340 | || (expecting_tls_get_addr == 1 |
| 5341 | && !sec->has_tls_get_addr_call)) |
| 5342 | continue; |
| 5343 | |
| 5344 | if (rel + 1 < relend |
| 5345 | && branch_reloc_hash_match (ibfd, rel + 1, |
| 5346 | htab->tls_get_addr)) |
| 5347 | continue; |
| 5348 | |
| 5349 | /* Uh oh, we didn't find the expected call. We |
| 5350 | could just mark this symbol to exclude it |
| 5351 | from tls optimization but it's safer to skip |
| 5352 | the entire optimization. */ |
| 5353 | info->callbacks->minfo (_("%H arg lost __tls_get_addr, " |
| 5354 | "TLS optimization disabled\n"), |
| 5355 | ibfd, sec, rel->r_offset); |
| 5356 | if (elf_section_data (sec)->relocs != relstart) |
| 5357 | free (relstart); |
| 5358 | return TRUE; |
| 5359 | } |
| 5360 | |
| 5361 | if (expecting_tls_get_addr) |
| 5362 | { |
| 5363 | struct plt_entry *ent; |
| 5364 | bfd_vma addend = 0; |
| 5365 | |
| 5366 | if (info->shared |
| 5367 | && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) |
| 5368 | addend = rel[1].r_addend; |
| 5369 | ent = find_plt_ent (&htab->tls_get_addr->plt.plist, |
| 5370 | got2, addend); |
| 5371 | if (ent != NULL && ent->plt.refcount > 0) |
| 5372 | ent->plt.refcount -= 1; |
| 5373 | |
| 5374 | if (expecting_tls_get_addr == 2) |
| 5375 | continue; |
| 5376 | } |
| 5377 | |
| 5378 | if (h != NULL) |
| 5379 | { |
| 5380 | tls_mask = &ppc_elf_hash_entry (h)->tls_mask; |
| 5381 | got_count = &h->got.refcount; |
| 5382 | } |
| 5383 | else |
| 5384 | { |
| 5385 | bfd_signed_vma *lgot_refs; |
| 5386 | struct plt_entry **local_plt; |
| 5387 | char *lgot_masks; |
| 5388 | |
| 5389 | if (locsyms == NULL) |
| 5390 | { |
| 5391 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 5392 | if (locsyms == NULL) |
| 5393 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 5394 | symtab_hdr->sh_info, |
| 5395 | 0, NULL, NULL, NULL); |
| 5396 | if (locsyms == NULL) |
| 5397 | { |
| 5398 | if (elf_section_data (sec)->relocs != relstart) |
| 5399 | free (relstart); |
| 5400 | return FALSE; |
| 5401 | } |
| 5402 | } |
| 5403 | lgot_refs = elf_local_got_refcounts (ibfd); |
| 5404 | if (lgot_refs == NULL) |
| 5405 | abort (); |
| 5406 | local_plt = (struct plt_entry **) |
| 5407 | (lgot_refs + symtab_hdr->sh_info); |
| 5408 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 5409 | tls_mask = &lgot_masks[r_symndx]; |
| 5410 | got_count = &lgot_refs[r_symndx]; |
| 5411 | } |
| 5412 | |
| 5413 | if (tls_set == 0) |
| 5414 | { |
| 5415 | /* We managed to get rid of a got entry. */ |
| 5416 | if (*got_count > 0) |
| 5417 | *got_count -= 1; |
| 5418 | } |
| 5419 | |
| 5420 | *tls_mask |= tls_set; |
| 5421 | *tls_mask &= ~tls_clear; |
| 5422 | } |
| 5423 | |
| 5424 | if (elf_section_data (sec)->relocs != relstart) |
| 5425 | free (relstart); |
| 5426 | } |
| 5427 | |
| 5428 | if (locsyms != NULL |
| 5429 | && (symtab_hdr->contents != (unsigned char *) locsyms)) |
| 5430 | { |
| 5431 | if (!info->keep_memory) |
| 5432 | free (locsyms); |
| 5433 | else |
| 5434 | symtab_hdr->contents = (unsigned char *) locsyms; |
| 5435 | } |
| 5436 | } |
| 5437 | return TRUE; |
| 5438 | } |
| 5439 | \f |
| 5440 | /* Return true if we have dynamic relocs that apply to read-only sections. */ |
| 5441 | |
| 5442 | static bfd_boolean |
| 5443 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 5444 | { |
| 5445 | struct elf_dyn_relocs *p; |
| 5446 | |
| 5447 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 5448 | { |
| 5449 | asection *s = p->sec->output_section; |
| 5450 | |
| 5451 | if (s != NULL |
| 5452 | && ((s->flags & (SEC_READONLY | SEC_ALLOC)) |
| 5453 | == (SEC_READONLY | SEC_ALLOC))) |
| 5454 | return TRUE; |
| 5455 | } |
| 5456 | return FALSE; |
| 5457 | } |
| 5458 | |
| 5459 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 5460 | regular object. The current definition is in some section of the |
| 5461 | dynamic object, but we're not including those sections. We have to |
| 5462 | change the definition to something the rest of the link can |
| 5463 | understand. */ |
| 5464 | |
| 5465 | static bfd_boolean |
| 5466 | ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 5467 | struct elf_link_hash_entry *h) |
| 5468 | { |
| 5469 | struct ppc_elf_link_hash_table *htab; |
| 5470 | asection *s; |
| 5471 | |
| 5472 | #ifdef DEBUG |
| 5473 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", |
| 5474 | h->root.root.string); |
| 5475 | #endif |
| 5476 | |
| 5477 | /* Make sure we know what is going on here. */ |
| 5478 | htab = ppc_elf_hash_table (info); |
| 5479 | BFD_ASSERT (htab->elf.dynobj != NULL |
| 5480 | && (h->needs_plt |
| 5481 | || h->type == STT_GNU_IFUNC |
| 5482 | || h->u.weakdef != NULL |
| 5483 | || (h->def_dynamic |
| 5484 | && h->ref_regular |
| 5485 | && !h->def_regular))); |
| 5486 | |
| 5487 | /* Deal with function syms. */ |
| 5488 | if (h->type == STT_FUNC |
| 5489 | || h->type == STT_GNU_IFUNC |
| 5490 | || h->needs_plt) |
| 5491 | { |
| 5492 | /* Clear procedure linkage table information for any symbol that |
| 5493 | won't need a .plt entry. */ |
| 5494 | struct plt_entry *ent; |
| 5495 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 5496 | if (ent->plt.refcount > 0) |
| 5497 | break; |
| 5498 | if (ent == NULL |
| 5499 | || (h->type != STT_GNU_IFUNC |
| 5500 | && (SYMBOL_CALLS_LOCAL (info, h) |
| 5501 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 5502 | && h->root.type == bfd_link_hash_undefweak)))) |
| 5503 | { |
| 5504 | /* A PLT entry is not required/allowed when: |
| 5505 | |
| 5506 | 1. We are not using ld.so; because then the PLT entry |
| 5507 | can't be set up, so we can't use one. In this case, |
| 5508 | ppc_elf_adjust_dynamic_symbol won't even be called. |
| 5509 | |
| 5510 | 2. GC has rendered the entry unused. |
| 5511 | |
| 5512 | 3. We know for certain that a call to this symbol |
| 5513 | will go to this object, or will remain undefined. */ |
| 5514 | h->plt.plist = NULL; |
| 5515 | h->needs_plt = 0; |
| 5516 | } |
| 5517 | else |
| 5518 | { |
| 5519 | /* After adjust_dynamic_symbol, non_got_ref set in the |
| 5520 | non-shared case means that we have allocated space in |
| 5521 | .dynbss for the symbol and thus dyn_relocs for this |
| 5522 | symbol should be discarded. |
| 5523 | If we get here we know we are making a PLT entry for this |
| 5524 | symbol, and in an executable we'd normally resolve |
| 5525 | relocations against this symbol to the PLT entry. Allow |
| 5526 | dynamic relocs if the reference is weak, and the dynamic |
| 5527 | relocs will not cause text relocation. */ |
| 5528 | if (!h->ref_regular_nonweak |
| 5529 | && h->non_got_ref |
| 5530 | && h->type != STT_GNU_IFUNC |
| 5531 | && !htab->is_vxworks |
| 5532 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 5533 | && !readonly_dynrelocs (h)) |
| 5534 | h->non_got_ref = 0; |
| 5535 | } |
| 5536 | return TRUE; |
| 5537 | } |
| 5538 | else |
| 5539 | h->plt.plist = NULL; |
| 5540 | |
| 5541 | /* If this is a weak symbol, and there is a real definition, the |
| 5542 | processor independent code will have arranged for us to see the |
| 5543 | real definition first, and we can just use the same value. */ |
| 5544 | if (h->u.weakdef != NULL) |
| 5545 | { |
| 5546 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 5547 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 5548 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 5549 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 5550 | if (ELIMINATE_COPY_RELOCS) |
| 5551 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 5552 | return TRUE; |
| 5553 | } |
| 5554 | |
| 5555 | /* This is a reference to a symbol defined by a dynamic object which |
| 5556 | is not a function. */ |
| 5557 | |
| 5558 | /* If we are creating a shared library, we must presume that the |
| 5559 | only references to the symbol are via the global offset table. |
| 5560 | For such cases we need not do anything here; the relocations will |
| 5561 | be handled correctly by relocate_section. */ |
| 5562 | if (info->shared) |
| 5563 | return TRUE; |
| 5564 | |
| 5565 | /* If there are no references to this symbol that do not use the |
| 5566 | GOT, we don't need to generate a copy reloc. */ |
| 5567 | if (!h->non_got_ref) |
| 5568 | return TRUE; |
| 5569 | |
| 5570 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 5571 | we'll be keeping the dynamic relocs and avoiding the copy reloc. |
| 5572 | We can't do this if there are any small data relocations. This |
| 5573 | doesn't work on VxWorks, where we can not have dynamic |
| 5574 | relocations (other than copy and jump slot relocations) in an |
| 5575 | executable. */ |
| 5576 | if (ELIMINATE_COPY_RELOCS |
| 5577 | && !ppc_elf_hash_entry (h)->has_sda_refs |
| 5578 | && !htab->is_vxworks |
| 5579 | && !h->def_regular |
| 5580 | && !readonly_dynrelocs (h)) |
| 5581 | { |
| 5582 | h->non_got_ref = 0; |
| 5583 | return TRUE; |
| 5584 | } |
| 5585 | |
| 5586 | /* We must allocate the symbol in our .dynbss section, which will |
| 5587 | become part of the .bss section of the executable. There will be |
| 5588 | an entry for this symbol in the .dynsym section. The dynamic |
| 5589 | object will contain position independent code, so all references |
| 5590 | from the dynamic object to this symbol will go through the global |
| 5591 | offset table. The dynamic linker will use the .dynsym entry to |
| 5592 | determine the address it must put in the global offset table, so |
| 5593 | both the dynamic object and the regular object will refer to the |
| 5594 | same memory location for the variable. |
| 5595 | |
| 5596 | Of course, if the symbol is referenced using SDAREL relocs, we |
| 5597 | must instead allocate it in .sbss. */ |
| 5598 | |
| 5599 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 5600 | s = htab->dynsbss; |
| 5601 | else |
| 5602 | s = htab->dynbss; |
| 5603 | BFD_ASSERT (s != NULL); |
| 5604 | |
| 5605 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 5606 | copy the initial value out of the dynamic object and into the |
| 5607 | runtime process image. We need to remember the offset into the |
| 5608 | .rela.bss section we are going to use. */ |
| 5609 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 5610 | { |
| 5611 | asection *srel; |
| 5612 | |
| 5613 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 5614 | srel = htab->relsbss; |
| 5615 | else |
| 5616 | srel = htab->relbss; |
| 5617 | BFD_ASSERT (srel != NULL); |
| 5618 | srel->size += sizeof (Elf32_External_Rela); |
| 5619 | h->needs_copy = 1; |
| 5620 | } |
| 5621 | |
| 5622 | return _bfd_elf_adjust_dynamic_copy (h, s); |
| 5623 | } |
| 5624 | \f |
| 5625 | /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is |
| 5626 | xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, |
| 5627 | specifying the addend on the plt relocation. For -fpic code, the sym |
| 5628 | is xxxxxxxx.plt_pic32.<callee>, and for -fPIC |
| 5629 | xxxxxxxx.got2.plt_pic32.<callee>. */ |
| 5630 | |
| 5631 | static bfd_boolean |
| 5632 | add_stub_sym (struct plt_entry *ent, |
| 5633 | struct elf_link_hash_entry *h, |
| 5634 | struct bfd_link_info *info) |
| 5635 | { |
| 5636 | struct elf_link_hash_entry *sh; |
| 5637 | size_t len1, len2, len3; |
| 5638 | char *name; |
| 5639 | const char *stub; |
| 5640 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 5641 | |
| 5642 | if (info->shared) |
| 5643 | stub = ".plt_pic32."; |
| 5644 | else |
| 5645 | stub = ".plt_call32."; |
| 5646 | |
| 5647 | len1 = strlen (h->root.root.string); |
| 5648 | len2 = strlen (stub); |
| 5649 | len3 = 0; |
| 5650 | if (ent->sec) |
| 5651 | len3 = strlen (ent->sec->name); |
| 5652 | name = bfd_malloc (len1 + len2 + len3 + 9); |
| 5653 | if (name == NULL) |
| 5654 | return FALSE; |
| 5655 | sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); |
| 5656 | if (ent->sec) |
| 5657 | memcpy (name + 8, ent->sec->name, len3); |
| 5658 | memcpy (name + 8 + len3, stub, len2); |
| 5659 | memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); |
| 5660 | sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 5661 | if (sh == NULL) |
| 5662 | return FALSE; |
| 5663 | if (sh->root.type == bfd_link_hash_new) |
| 5664 | { |
| 5665 | sh->root.type = bfd_link_hash_defined; |
| 5666 | sh->root.u.def.section = htab->glink; |
| 5667 | sh->root.u.def.value = ent->glink_offset; |
| 5668 | sh->ref_regular = 1; |
| 5669 | sh->def_regular = 1; |
| 5670 | sh->ref_regular_nonweak = 1; |
| 5671 | sh->forced_local = 1; |
| 5672 | sh->non_elf = 0; |
| 5673 | } |
| 5674 | return TRUE; |
| 5675 | } |
| 5676 | |
| 5677 | /* Allocate NEED contiguous space in .got, and return the offset. |
| 5678 | Handles allocation of the got header when crossing 32k. */ |
| 5679 | |
| 5680 | static bfd_vma |
| 5681 | allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) |
| 5682 | { |
| 5683 | bfd_vma where; |
| 5684 | unsigned int max_before_header; |
| 5685 | |
| 5686 | if (htab->plt_type == PLT_VXWORKS) |
| 5687 | { |
| 5688 | where = htab->got->size; |
| 5689 | htab->got->size += need; |
| 5690 | } |
| 5691 | else |
| 5692 | { |
| 5693 | max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; |
| 5694 | if (need <= htab->got_gap) |
| 5695 | { |
| 5696 | where = max_before_header - htab->got_gap; |
| 5697 | htab->got_gap -= need; |
| 5698 | } |
| 5699 | else |
| 5700 | { |
| 5701 | if (htab->got->size + need > max_before_header |
| 5702 | && htab->got->size <= max_before_header) |
| 5703 | { |
| 5704 | htab->got_gap = max_before_header - htab->got->size; |
| 5705 | htab->got->size = max_before_header + htab->got_header_size; |
| 5706 | } |
| 5707 | where = htab->got->size; |
| 5708 | htab->got->size += need; |
| 5709 | } |
| 5710 | } |
| 5711 | return where; |
| 5712 | } |
| 5713 | |
| 5714 | /* Allocate space in associated reloc sections for dynamic relocs. */ |
| 5715 | |
| 5716 | static bfd_boolean |
| 5717 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 5718 | { |
| 5719 | struct bfd_link_info *info = inf; |
| 5720 | struct ppc_elf_link_hash_entry *eh; |
| 5721 | struct ppc_elf_link_hash_table *htab; |
| 5722 | struct elf_dyn_relocs *p; |
| 5723 | |
| 5724 | if (h->root.type == bfd_link_hash_indirect) |
| 5725 | return TRUE; |
| 5726 | |
| 5727 | htab = ppc_elf_hash_table (info); |
| 5728 | if (htab->elf.dynamic_sections_created |
| 5729 | || h->type == STT_GNU_IFUNC) |
| 5730 | { |
| 5731 | struct plt_entry *ent; |
| 5732 | bfd_boolean doneone = FALSE; |
| 5733 | bfd_vma plt_offset = 0, glink_offset = 0; |
| 5734 | bfd_boolean dyn; |
| 5735 | |
| 5736 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 5737 | if (ent->plt.refcount > 0) |
| 5738 | { |
| 5739 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5740 | if (h->dynindx == -1 |
| 5741 | && !h->forced_local |
| 5742 | && !h->def_regular |
| 5743 | && htab->elf.dynamic_sections_created) |
| 5744 | { |
| 5745 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5746 | return FALSE; |
| 5747 | } |
| 5748 | |
| 5749 | dyn = htab->elf.dynamic_sections_created; |
| 5750 | if (info->shared |
| 5751 | || h->type == STT_GNU_IFUNC |
| 5752 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) |
| 5753 | { |
| 5754 | asection *s = htab->plt; |
| 5755 | if (!dyn || h->dynindx == -1) |
| 5756 | s = htab->iplt; |
| 5757 | |
| 5758 | if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) |
| 5759 | { |
| 5760 | if (!doneone) |
| 5761 | { |
| 5762 | plt_offset = s->size; |
| 5763 | s->size += 4; |
| 5764 | } |
| 5765 | ent->plt.offset = plt_offset; |
| 5766 | |
| 5767 | s = htab->glink; |
| 5768 | if (!doneone || info->shared) |
| 5769 | { |
| 5770 | glink_offset = s->size; |
| 5771 | s->size += GLINK_ENTRY_SIZE; |
| 5772 | if (h == htab->tls_get_addr |
| 5773 | && !htab->no_tls_get_addr_opt) |
| 5774 | s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; |
| 5775 | } |
| 5776 | if (!doneone |
| 5777 | && !info->shared |
| 5778 | && h->def_dynamic |
| 5779 | && !h->def_regular) |
| 5780 | { |
| 5781 | h->root.u.def.section = s; |
| 5782 | h->root.u.def.value = glink_offset; |
| 5783 | } |
| 5784 | ent->glink_offset = glink_offset; |
| 5785 | |
| 5786 | if (htab->emit_stub_syms |
| 5787 | && !add_stub_sym (ent, h, info)) |
| 5788 | return FALSE; |
| 5789 | } |
| 5790 | else |
| 5791 | { |
| 5792 | if (!doneone) |
| 5793 | { |
| 5794 | /* If this is the first .plt entry, make room |
| 5795 | for the special first entry. */ |
| 5796 | if (s->size == 0) |
| 5797 | s->size += htab->plt_initial_entry_size; |
| 5798 | |
| 5799 | /* The PowerPC PLT is actually composed of two |
| 5800 | parts, the first part is 2 words (for a load |
| 5801 | and a jump), and then there is a remaining |
| 5802 | word available at the end. */ |
| 5803 | plt_offset = (htab->plt_initial_entry_size |
| 5804 | + (htab->plt_slot_size |
| 5805 | * ((s->size |
| 5806 | - htab->plt_initial_entry_size) |
| 5807 | / htab->plt_entry_size))); |
| 5808 | |
| 5809 | /* If this symbol is not defined in a regular |
| 5810 | file, and we are not generating a shared |
| 5811 | library, then set the symbol to this location |
| 5812 | in the .plt. This is to avoid text |
| 5813 | relocations, and is required to make |
| 5814 | function pointers compare as equal between |
| 5815 | the normal executable and the shared library. */ |
| 5816 | if (! info->shared |
| 5817 | && h->def_dynamic |
| 5818 | && !h->def_regular) |
| 5819 | { |
| 5820 | h->root.u.def.section = s; |
| 5821 | h->root.u.def.value = plt_offset; |
| 5822 | } |
| 5823 | |
| 5824 | /* Make room for this entry. */ |
| 5825 | s->size += htab->plt_entry_size; |
| 5826 | /* After the 8192nd entry, room for two entries |
| 5827 | is allocated. */ |
| 5828 | if (htab->plt_type == PLT_OLD |
| 5829 | && (s->size - htab->plt_initial_entry_size) |
| 5830 | / htab->plt_entry_size |
| 5831 | > PLT_NUM_SINGLE_ENTRIES) |
| 5832 | s->size += htab->plt_entry_size; |
| 5833 | } |
| 5834 | ent->plt.offset = plt_offset; |
| 5835 | } |
| 5836 | |
| 5837 | /* We also need to make an entry in the .rela.plt section. */ |
| 5838 | if (!doneone) |
| 5839 | { |
| 5840 | if (!htab->elf.dynamic_sections_created |
| 5841 | || h->dynindx == -1) |
| 5842 | htab->reliplt->size += sizeof (Elf32_External_Rela); |
| 5843 | else |
| 5844 | { |
| 5845 | htab->relplt->size += sizeof (Elf32_External_Rela); |
| 5846 | |
| 5847 | if (htab->plt_type == PLT_VXWORKS) |
| 5848 | { |
| 5849 | /* Allocate space for the unloaded relocations. */ |
| 5850 | if (!info->shared |
| 5851 | && htab->elf.dynamic_sections_created) |
| 5852 | { |
| 5853 | if (ent->plt.offset |
| 5854 | == (bfd_vma) htab->plt_initial_entry_size) |
| 5855 | { |
| 5856 | htab->srelplt2->size |
| 5857 | += (sizeof (Elf32_External_Rela) |
| 5858 | * VXWORKS_PLTRESOLVE_RELOCS); |
| 5859 | } |
| 5860 | |
| 5861 | htab->srelplt2->size |
| 5862 | += (sizeof (Elf32_External_Rela) |
| 5863 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); |
| 5864 | } |
| 5865 | |
| 5866 | /* Every PLT entry has an associated GOT entry in |
| 5867 | .got.plt. */ |
| 5868 | htab->sgotplt->size += 4; |
| 5869 | } |
| 5870 | } |
| 5871 | doneone = TRUE; |
| 5872 | } |
| 5873 | } |
| 5874 | else |
| 5875 | ent->plt.offset = (bfd_vma) -1; |
| 5876 | } |
| 5877 | else |
| 5878 | ent->plt.offset = (bfd_vma) -1; |
| 5879 | |
| 5880 | if (!doneone) |
| 5881 | { |
| 5882 | h->plt.plist = NULL; |
| 5883 | h->needs_plt = 0; |
| 5884 | } |
| 5885 | } |
| 5886 | else |
| 5887 | { |
| 5888 | h->plt.plist = NULL; |
| 5889 | h->needs_plt = 0; |
| 5890 | } |
| 5891 | |
| 5892 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 5893 | if (eh->elf.got.refcount > 0) |
| 5894 | { |
| 5895 | bfd_boolean dyn; |
| 5896 | unsigned int need; |
| 5897 | |
| 5898 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5899 | if (eh->elf.dynindx == -1 |
| 5900 | && !eh->elf.forced_local |
| 5901 | && eh->elf.type != STT_GNU_IFUNC |
| 5902 | && htab->elf.dynamic_sections_created) |
| 5903 | { |
| 5904 | if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) |
| 5905 | return FALSE; |
| 5906 | } |
| 5907 | |
| 5908 | need = 0; |
| 5909 | if ((eh->tls_mask & TLS_TLS) != 0) |
| 5910 | { |
| 5911 | if ((eh->tls_mask & TLS_LD) != 0) |
| 5912 | { |
| 5913 | if (!eh->elf.def_dynamic) |
| 5914 | /* We'll just use htab->tlsld_got.offset. This should |
| 5915 | always be the case. It's a little odd if we have |
| 5916 | a local dynamic reloc against a non-local symbol. */ |
| 5917 | htab->tlsld_got.refcount += 1; |
| 5918 | else |
| 5919 | need += 8; |
| 5920 | } |
| 5921 | if ((eh->tls_mask & TLS_GD) != 0) |
| 5922 | need += 8; |
| 5923 | if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 5924 | need += 4; |
| 5925 | if ((eh->tls_mask & TLS_DTPREL) != 0) |
| 5926 | need += 4; |
| 5927 | } |
| 5928 | else |
| 5929 | need += 4; |
| 5930 | if (need == 0) |
| 5931 | eh->elf.got.offset = (bfd_vma) -1; |
| 5932 | else |
| 5933 | { |
| 5934 | eh->elf.got.offset = allocate_got (htab, need); |
| 5935 | dyn = htab->elf.dynamic_sections_created; |
| 5936 | if ((info->shared |
| 5937 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) |
| 5938 | && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT |
| 5939 | || eh->elf.root.type != bfd_link_hash_undefweak)) |
| 5940 | { |
| 5941 | asection *rsec = htab->relgot; |
| 5942 | |
| 5943 | if (eh->elf.type == STT_GNU_IFUNC) |
| 5944 | rsec = htab->reliplt; |
| 5945 | /* All the entries we allocated need relocs. |
| 5946 | Except LD only needs one. */ |
| 5947 | if ((eh->tls_mask & TLS_LD) != 0 |
| 5948 | && eh->elf.def_dynamic) |
| 5949 | need -= 4; |
| 5950 | rsec->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 5951 | } |
| 5952 | } |
| 5953 | } |
| 5954 | else |
| 5955 | eh->elf.got.offset = (bfd_vma) -1; |
| 5956 | |
| 5957 | if (eh->dyn_relocs == NULL |
| 5958 | || !htab->elf.dynamic_sections_created) |
| 5959 | return TRUE; |
| 5960 | |
| 5961 | /* In the shared -Bsymbolic case, discard space allocated for |
| 5962 | dynamic pc-relative relocs against symbols which turn out to be |
| 5963 | defined in regular objects. For the normal shared case, discard |
| 5964 | space for relocs that have become local due to symbol visibility |
| 5965 | changes. */ |
| 5966 | |
| 5967 | if (info->shared) |
| 5968 | { |
| 5969 | /* Relocs that use pc_count are those that appear on a call insn, |
| 5970 | or certain REL relocs (see must_be_dyn_reloc) that can be |
| 5971 | generated via assembly. We want calls to protected symbols to |
| 5972 | resolve directly to the function rather than going via the plt. |
| 5973 | If people want function pointer comparisons to work as expected |
| 5974 | then they should avoid writing weird assembly. */ |
| 5975 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 5976 | { |
| 5977 | struct elf_dyn_relocs **pp; |
| 5978 | |
| 5979 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 5980 | { |
| 5981 | p->count -= p->pc_count; |
| 5982 | p->pc_count = 0; |
| 5983 | if (p->count == 0) |
| 5984 | *pp = p->next; |
| 5985 | else |
| 5986 | pp = &p->next; |
| 5987 | } |
| 5988 | } |
| 5989 | |
| 5990 | if (htab->is_vxworks) |
| 5991 | { |
| 5992 | struct elf_dyn_relocs **pp; |
| 5993 | |
| 5994 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 5995 | { |
| 5996 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) |
| 5997 | *pp = p->next; |
| 5998 | else |
| 5999 | pp = &p->next; |
| 6000 | } |
| 6001 | } |
| 6002 | |
| 6003 | /* Discard relocs on undefined symbols that must be local. */ |
| 6004 | if (eh->dyn_relocs != NULL |
| 6005 | && h->root.type == bfd_link_hash_undefined |
| 6006 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN |
| 6007 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) |
| 6008 | eh->dyn_relocs = NULL; |
| 6009 | |
| 6010 | /* Also discard relocs on undefined weak syms with non-default |
| 6011 | visibility. */ |
| 6012 | if (eh->dyn_relocs != NULL |
| 6013 | && h->root.type == bfd_link_hash_undefweak) |
| 6014 | { |
| 6015 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 6016 | eh->dyn_relocs = NULL; |
| 6017 | |
| 6018 | /* Make sure undefined weak symbols are output as a dynamic |
| 6019 | symbol in PIEs. */ |
| 6020 | else if (h->dynindx == -1 |
| 6021 | && !h->forced_local |
| 6022 | && !h->def_regular) |
| 6023 | { |
| 6024 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6025 | return FALSE; |
| 6026 | } |
| 6027 | } |
| 6028 | } |
| 6029 | else if (ELIMINATE_COPY_RELOCS) |
| 6030 | { |
| 6031 | /* For the non-shared case, discard space for relocs against |
| 6032 | symbols which turn out to need copy relocs or are not |
| 6033 | dynamic. */ |
| 6034 | |
| 6035 | if (!h->non_got_ref |
| 6036 | && !h->def_regular) |
| 6037 | { |
| 6038 | /* Make sure this symbol is output as a dynamic symbol. |
| 6039 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6040 | if (h->dynindx == -1 |
| 6041 | && !h->forced_local) |
| 6042 | { |
| 6043 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6044 | return FALSE; |
| 6045 | } |
| 6046 | |
| 6047 | /* If that succeeded, we know we'll be keeping all the |
| 6048 | relocs. */ |
| 6049 | if (h->dynindx != -1) |
| 6050 | goto keep; |
| 6051 | } |
| 6052 | |
| 6053 | eh->dyn_relocs = NULL; |
| 6054 | |
| 6055 | keep: ; |
| 6056 | } |
| 6057 | |
| 6058 | /* Finally, allocate space. */ |
| 6059 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 6060 | { |
| 6061 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 6062 | if (eh->elf.type == STT_GNU_IFUNC) |
| 6063 | sreloc = htab->reliplt; |
| 6064 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 6065 | } |
| 6066 | |
| 6067 | return TRUE; |
| 6068 | } |
| 6069 | |
| 6070 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 6071 | read-only sections. */ |
| 6072 | |
| 6073 | static bfd_boolean |
| 6074 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info) |
| 6075 | { |
| 6076 | if (h->root.type == bfd_link_hash_indirect) |
| 6077 | return TRUE; |
| 6078 | |
| 6079 | if (readonly_dynrelocs (h)) |
| 6080 | { |
| 6081 | ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; |
| 6082 | |
| 6083 | /* Not an error, just cut short the traversal. */ |
| 6084 | return FALSE; |
| 6085 | } |
| 6086 | return TRUE; |
| 6087 | } |
| 6088 | |
| 6089 | static const unsigned char glink_eh_frame_cie[] = |
| 6090 | { |
| 6091 | 0, 0, 0, 16, /* length. */ |
| 6092 | 0, 0, 0, 0, /* id. */ |
| 6093 | 1, /* CIE version. */ |
| 6094 | 'z', 'R', 0, /* Augmentation string. */ |
| 6095 | 4, /* Code alignment. */ |
| 6096 | 0x7c, /* Data alignment. */ |
| 6097 | 65, /* RA reg. */ |
| 6098 | 1, /* Augmentation size. */ |
| 6099 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ |
| 6100 | DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ |
| 6101 | }; |
| 6102 | |
| 6103 | /* Set the sizes of the dynamic sections. */ |
| 6104 | |
| 6105 | static bfd_boolean |
| 6106 | ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 6107 | struct bfd_link_info *info) |
| 6108 | { |
| 6109 | struct ppc_elf_link_hash_table *htab; |
| 6110 | asection *s; |
| 6111 | bfd_boolean relocs; |
| 6112 | bfd *ibfd; |
| 6113 | |
| 6114 | #ifdef DEBUG |
| 6115 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 6116 | #endif |
| 6117 | |
| 6118 | htab = ppc_elf_hash_table (info); |
| 6119 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 6120 | |
| 6121 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6122 | { |
| 6123 | /* Set the contents of the .interp section to the interpreter. */ |
| 6124 | if (info->executable) |
| 6125 | { |
| 6126 | s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); |
| 6127 | BFD_ASSERT (s != NULL); |
| 6128 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 6129 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 6130 | } |
| 6131 | } |
| 6132 | |
| 6133 | if (htab->plt_type == PLT_OLD) |
| 6134 | htab->got_header_size = 16; |
| 6135 | else if (htab->plt_type == PLT_NEW) |
| 6136 | htab->got_header_size = 12; |
| 6137 | |
| 6138 | /* Set up .got offsets for local syms, and space for local dynamic |
| 6139 | relocs. */ |
| 6140 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 6141 | { |
| 6142 | bfd_signed_vma *local_got; |
| 6143 | bfd_signed_vma *end_local_got; |
| 6144 | struct plt_entry **local_plt; |
| 6145 | struct plt_entry **end_local_plt; |
| 6146 | char *lgot_masks; |
| 6147 | bfd_size_type locsymcount; |
| 6148 | Elf_Internal_Shdr *symtab_hdr; |
| 6149 | |
| 6150 | if (!is_ppc_elf (ibfd)) |
| 6151 | continue; |
| 6152 | |
| 6153 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 6154 | { |
| 6155 | struct ppc_dyn_relocs *p; |
| 6156 | |
| 6157 | for (p = ((struct ppc_dyn_relocs *) |
| 6158 | elf_section_data (s)->local_dynrel); |
| 6159 | p != NULL; |
| 6160 | p = p->next) |
| 6161 | { |
| 6162 | if (!bfd_is_abs_section (p->sec) |
| 6163 | && bfd_is_abs_section (p->sec->output_section)) |
| 6164 | { |
| 6165 | /* Input section has been discarded, either because |
| 6166 | it is a copy of a linkonce section or due to |
| 6167 | linker script /DISCARD/, so we'll be discarding |
| 6168 | the relocs too. */ |
| 6169 | } |
| 6170 | else if (htab->is_vxworks |
| 6171 | && strcmp (p->sec->output_section->name, |
| 6172 | ".tls_vars") == 0) |
| 6173 | { |
| 6174 | /* Relocations in vxworks .tls_vars sections are |
| 6175 | handled specially by the loader. */ |
| 6176 | } |
| 6177 | else if (p->count != 0) |
| 6178 | { |
| 6179 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 6180 | if (p->ifunc) |
| 6181 | sreloc = htab->reliplt; |
| 6182 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 6183 | if ((p->sec->output_section->flags |
| 6184 | & (SEC_READONLY | SEC_ALLOC)) |
| 6185 | == (SEC_READONLY | SEC_ALLOC)) |
| 6186 | info->flags |= DF_TEXTREL; |
| 6187 | } |
| 6188 | } |
| 6189 | } |
| 6190 | |
| 6191 | local_got = elf_local_got_refcounts (ibfd); |
| 6192 | if (!local_got) |
| 6193 | continue; |
| 6194 | |
| 6195 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 6196 | locsymcount = symtab_hdr->sh_info; |
| 6197 | end_local_got = local_got + locsymcount; |
| 6198 | local_plt = (struct plt_entry **) end_local_got; |
| 6199 | end_local_plt = local_plt + locsymcount; |
| 6200 | lgot_masks = (char *) end_local_plt; |
| 6201 | |
| 6202 | for (; local_got < end_local_got; ++local_got, ++lgot_masks) |
| 6203 | if (*local_got > 0) |
| 6204 | { |
| 6205 | unsigned int need = 0; |
| 6206 | if ((*lgot_masks & TLS_TLS) != 0) |
| 6207 | { |
| 6208 | if ((*lgot_masks & TLS_GD) != 0) |
| 6209 | need += 8; |
| 6210 | if ((*lgot_masks & TLS_LD) != 0) |
| 6211 | htab->tlsld_got.refcount += 1; |
| 6212 | if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 6213 | need += 4; |
| 6214 | if ((*lgot_masks & TLS_DTPREL) != 0) |
| 6215 | need += 4; |
| 6216 | } |
| 6217 | else |
| 6218 | need += 4; |
| 6219 | if (need == 0) |
| 6220 | *local_got = (bfd_vma) -1; |
| 6221 | else |
| 6222 | { |
| 6223 | *local_got = allocate_got (htab, need); |
| 6224 | if (info->shared) |
| 6225 | { |
| 6226 | asection *srel = htab->relgot; |
| 6227 | if ((*lgot_masks & PLT_IFUNC) != 0) |
| 6228 | srel = htab->reliplt; |
| 6229 | srel->size += need * (sizeof (Elf32_External_Rela) / 4); |
| 6230 | } |
| 6231 | } |
| 6232 | } |
| 6233 | else |
| 6234 | *local_got = (bfd_vma) -1; |
| 6235 | |
| 6236 | if (htab->is_vxworks) |
| 6237 | continue; |
| 6238 | |
| 6239 | /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ |
| 6240 | for (; local_plt < end_local_plt; ++local_plt) |
| 6241 | { |
| 6242 | struct plt_entry *ent; |
| 6243 | bfd_boolean doneone = FALSE; |
| 6244 | bfd_vma plt_offset = 0, glink_offset = 0; |
| 6245 | |
| 6246 | for (ent = *local_plt; ent != NULL; ent = ent->next) |
| 6247 | if (ent->plt.refcount > 0) |
| 6248 | { |
| 6249 | s = htab->iplt; |
| 6250 | |
| 6251 | if (!doneone) |
| 6252 | { |
| 6253 | plt_offset = s->size; |
| 6254 | s->size += 4; |
| 6255 | } |
| 6256 | ent->plt.offset = plt_offset; |
| 6257 | |
| 6258 | s = htab->glink; |
| 6259 | if (!doneone || info->shared) |
| 6260 | { |
| 6261 | glink_offset = s->size; |
| 6262 | s->size += GLINK_ENTRY_SIZE; |
| 6263 | } |
| 6264 | ent->glink_offset = glink_offset; |
| 6265 | |
| 6266 | if (!doneone) |
| 6267 | { |
| 6268 | htab->reliplt->size += sizeof (Elf32_External_Rela); |
| 6269 | doneone = TRUE; |
| 6270 | } |
| 6271 | } |
| 6272 | else |
| 6273 | ent->plt.offset = (bfd_vma) -1; |
| 6274 | } |
| 6275 | } |
| 6276 | |
| 6277 | /* Allocate space for global sym dynamic relocs. */ |
| 6278 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); |
| 6279 | |
| 6280 | if (htab->tlsld_got.refcount > 0) |
| 6281 | { |
| 6282 | htab->tlsld_got.offset = allocate_got (htab, 8); |
| 6283 | if (info->shared) |
| 6284 | htab->relgot->size += sizeof (Elf32_External_Rela); |
| 6285 | } |
| 6286 | else |
| 6287 | htab->tlsld_got.offset = (bfd_vma) -1; |
| 6288 | |
| 6289 | if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) |
| 6290 | { |
| 6291 | unsigned int g_o_t = 32768; |
| 6292 | |
| 6293 | /* If we haven't allocated the header, do so now. When we get here, |
| 6294 | for old plt/got the got size will be 0 to 32764 (not allocated), |
| 6295 | or 32780 to 65536 (header allocated). For new plt/got, the |
| 6296 | corresponding ranges are 0 to 32768 and 32780 to 65536. */ |
| 6297 | if (htab->got->size <= 32768) |
| 6298 | { |
| 6299 | g_o_t = htab->got->size; |
| 6300 | if (htab->plt_type == PLT_OLD) |
| 6301 | g_o_t += 4; |
| 6302 | htab->got->size += htab->got_header_size; |
| 6303 | } |
| 6304 | |
| 6305 | htab->elf.hgot->root.u.def.value = g_o_t; |
| 6306 | } |
| 6307 | if (info->shared) |
| 6308 | { |
| 6309 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 6310 | if (sda != NULL |
| 6311 | && !(sda->root.type == bfd_link_hash_defined |
| 6312 | || sda->root.type == bfd_link_hash_defweak)) |
| 6313 | { |
| 6314 | sda->root.type = bfd_link_hash_defined; |
| 6315 | sda->root.u.def.section = htab->elf.hgot->root.u.def.section; |
| 6316 | sda->root.u.def.value = htab->elf.hgot->root.u.def.value; |
| 6317 | } |
| 6318 | } |
| 6319 | |
| 6320 | if (htab->glink != NULL |
| 6321 | && htab->glink->size != 0 |
| 6322 | && htab->elf.dynamic_sections_created) |
| 6323 | { |
| 6324 | htab->glink_pltresolve = htab->glink->size; |
| 6325 | /* Space for the branch table. */ |
| 6326 | htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; |
| 6327 | /* Pad out to align the start of PLTresolve. */ |
| 6328 | htab->glink->size += -htab->glink->size & 15; |
| 6329 | htab->glink->size += GLINK_PLTRESOLVE; |
| 6330 | |
| 6331 | if (htab->emit_stub_syms) |
| 6332 | { |
| 6333 | struct elf_link_hash_entry *sh; |
| 6334 | sh = elf_link_hash_lookup (&htab->elf, "__glink", |
| 6335 | TRUE, FALSE, FALSE); |
| 6336 | if (sh == NULL) |
| 6337 | return FALSE; |
| 6338 | if (sh->root.type == bfd_link_hash_new) |
| 6339 | { |
| 6340 | sh->root.type = bfd_link_hash_defined; |
| 6341 | sh->root.u.def.section = htab->glink; |
| 6342 | sh->root.u.def.value = htab->glink_pltresolve; |
| 6343 | sh->ref_regular = 1; |
| 6344 | sh->def_regular = 1; |
| 6345 | sh->ref_regular_nonweak = 1; |
| 6346 | sh->forced_local = 1; |
| 6347 | sh->non_elf = 0; |
| 6348 | } |
| 6349 | sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", |
| 6350 | TRUE, FALSE, FALSE); |
| 6351 | if (sh == NULL) |
| 6352 | return FALSE; |
| 6353 | if (sh->root.type == bfd_link_hash_new) |
| 6354 | { |
| 6355 | sh->root.type = bfd_link_hash_defined; |
| 6356 | sh->root.u.def.section = htab->glink; |
| 6357 | sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; |
| 6358 | sh->ref_regular = 1; |
| 6359 | sh->def_regular = 1; |
| 6360 | sh->ref_regular_nonweak = 1; |
| 6361 | sh->forced_local = 1; |
| 6362 | sh->non_elf = 0; |
| 6363 | } |
| 6364 | } |
| 6365 | } |
| 6366 | |
| 6367 | if (htab->glink != NULL |
| 6368 | && htab->glink->size != 0 |
| 6369 | && htab->glink_eh_frame != NULL |
| 6370 | && !bfd_is_abs_section (htab->glink_eh_frame->output_section) |
| 6371 | && _bfd_elf_eh_frame_present (info)) |
| 6372 | { |
| 6373 | s = htab->glink_eh_frame; |
| 6374 | s->size = sizeof (glink_eh_frame_cie) + 20; |
| 6375 | if (info->shared) |
| 6376 | { |
| 6377 | s->size += 4; |
| 6378 | if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) |
| 6379 | s->size += 4; |
| 6380 | } |
| 6381 | } |
| 6382 | |
| 6383 | /* We've now determined the sizes of the various dynamic sections. |
| 6384 | Allocate memory for them. */ |
| 6385 | relocs = FALSE; |
| 6386 | for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) |
| 6387 | { |
| 6388 | bfd_boolean strip_section = TRUE; |
| 6389 | |
| 6390 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 6391 | continue; |
| 6392 | |
| 6393 | if (s == htab->plt |
| 6394 | || s == htab->got) |
| 6395 | { |
| 6396 | /* We'd like to strip these sections if they aren't needed, but if |
| 6397 | we've exported dynamic symbols from them we must leave them. |
| 6398 | It's too late to tell BFD to get rid of the symbols. */ |
| 6399 | if (htab->elf.hplt != NULL) |
| 6400 | strip_section = FALSE; |
| 6401 | /* Strip this section if we don't need it; see the |
| 6402 | comment below. */ |
| 6403 | } |
| 6404 | else if (s == htab->iplt |
| 6405 | || s == htab->glink |
| 6406 | || s == htab->glink_eh_frame |
| 6407 | || s == htab->sgotplt |
| 6408 | || s == htab->sbss |
| 6409 | || s == htab->dynbss |
| 6410 | || s == htab->dynsbss |
| 6411 | || s == htab->sdata[0].section |
| 6412 | || s == htab->sdata[1].section) |
| 6413 | { |
| 6414 | /* Strip these too. */ |
| 6415 | } |
| 6416 | else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), |
| 6417 | ".rela")) |
| 6418 | { |
| 6419 | if (s->size != 0) |
| 6420 | { |
| 6421 | /* Remember whether there are any relocation sections. */ |
| 6422 | relocs = TRUE; |
| 6423 | |
| 6424 | /* We use the reloc_count field as a counter if we need |
| 6425 | to copy relocs into the output file. */ |
| 6426 | s->reloc_count = 0; |
| 6427 | } |
| 6428 | } |
| 6429 | else |
| 6430 | { |
| 6431 | /* It's not one of our sections, so don't allocate space. */ |
| 6432 | continue; |
| 6433 | } |
| 6434 | |
| 6435 | if (s->size == 0 && strip_section) |
| 6436 | { |
| 6437 | /* If we don't need this section, strip it from the |
| 6438 | output file. This is mostly to handle .rela.bss and |
| 6439 | .rela.plt. We must create both sections in |
| 6440 | create_dynamic_sections, because they must be created |
| 6441 | before the linker maps input sections to output |
| 6442 | sections. The linker does that before |
| 6443 | adjust_dynamic_symbol is called, and it is that |
| 6444 | function which decides whether anything needs to go |
| 6445 | into these sections. */ |
| 6446 | s->flags |= SEC_EXCLUDE; |
| 6447 | continue; |
| 6448 | } |
| 6449 | |
| 6450 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 6451 | continue; |
| 6452 | |
| 6453 | /* Allocate memory for the section contents. */ |
| 6454 | s->contents = bfd_zalloc (htab->elf.dynobj, s->size); |
| 6455 | if (s->contents == NULL) |
| 6456 | return FALSE; |
| 6457 | } |
| 6458 | |
| 6459 | if (htab->elf.dynamic_sections_created) |
| 6460 | { |
| 6461 | /* Add some entries to the .dynamic section. We fill in the |
| 6462 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 6463 | must add the entries now so that we get the correct size for |
| 6464 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 6465 | dynamic linker and used by the debugger. */ |
| 6466 | #define add_dynamic_entry(TAG, VAL) \ |
| 6467 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 6468 | |
| 6469 | if (info->executable) |
| 6470 | { |
| 6471 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 6472 | return FALSE; |
| 6473 | } |
| 6474 | |
| 6475 | if (htab->plt != NULL && htab->plt->size != 0) |
| 6476 | { |
| 6477 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 6478 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 6479 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 6480 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 6481 | return FALSE; |
| 6482 | } |
| 6483 | |
| 6484 | if (htab->glink != NULL && htab->glink->size != 0) |
| 6485 | { |
| 6486 | if (!add_dynamic_entry (DT_PPC_GOT, 0)) |
| 6487 | return FALSE; |
| 6488 | if (!htab->no_tls_get_addr_opt |
| 6489 | && htab->tls_get_addr != NULL |
| 6490 | && htab->tls_get_addr->plt.plist != NULL |
| 6491 | && !add_dynamic_entry (DT_PPC_TLSOPT, 0)) |
| 6492 | return FALSE; |
| 6493 | } |
| 6494 | |
| 6495 | if (relocs) |
| 6496 | { |
| 6497 | if (!add_dynamic_entry (DT_RELA, 0) |
| 6498 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 6499 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 6500 | return FALSE; |
| 6501 | } |
| 6502 | |
| 6503 | /* If any dynamic relocs apply to a read-only section, then we |
| 6504 | need a DT_TEXTREL entry. */ |
| 6505 | if ((info->flags & DF_TEXTREL) == 0) |
| 6506 | elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, |
| 6507 | info); |
| 6508 | |
| 6509 | if ((info->flags & DF_TEXTREL) != 0) |
| 6510 | { |
| 6511 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 6512 | return FALSE; |
| 6513 | } |
| 6514 | if (htab->is_vxworks |
| 6515 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
| 6516 | return FALSE; |
| 6517 | } |
| 6518 | #undef add_dynamic_entry |
| 6519 | |
| 6520 | if (htab->glink_eh_frame != NULL |
| 6521 | && htab->glink_eh_frame->contents != NULL) |
| 6522 | { |
| 6523 | unsigned char *p = htab->glink_eh_frame->contents; |
| 6524 | bfd_vma val; |
| 6525 | |
| 6526 | memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); |
| 6527 | /* CIE length (rewrite in case little-endian). */ |
| 6528 | bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); |
| 6529 | p += sizeof (glink_eh_frame_cie); |
| 6530 | /* FDE length. */ |
| 6531 | val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); |
| 6532 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 6533 | p += 4; |
| 6534 | /* CIE pointer. */ |
| 6535 | val = p - htab->glink_eh_frame->contents; |
| 6536 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 6537 | p += 4; |
| 6538 | /* Offset to .glink. Set later. */ |
| 6539 | p += 4; |
| 6540 | /* .glink size. */ |
| 6541 | bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); |
| 6542 | p += 4; |
| 6543 | /* Augmentation. */ |
| 6544 | p += 1; |
| 6545 | |
| 6546 | if (info->shared |
| 6547 | && htab->elf.dynamic_sections_created) |
| 6548 | { |
| 6549 | bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; |
| 6550 | if (adv < 64) |
| 6551 | *p++ = DW_CFA_advance_loc + adv; |
| 6552 | else if (adv < 256) |
| 6553 | { |
| 6554 | *p++ = DW_CFA_advance_loc1; |
| 6555 | *p++ = adv; |
| 6556 | } |
| 6557 | else if (adv < 65536) |
| 6558 | { |
| 6559 | *p++ = DW_CFA_advance_loc2; |
| 6560 | bfd_put_16 (htab->elf.dynobj, adv, p); |
| 6561 | p += 2; |
| 6562 | } |
| 6563 | else |
| 6564 | { |
| 6565 | *p++ = DW_CFA_advance_loc4; |
| 6566 | bfd_put_32 (htab->elf.dynobj, adv, p); |
| 6567 | p += 4; |
| 6568 | } |
| 6569 | *p++ = DW_CFA_register; |
| 6570 | *p++ = 65; |
| 6571 | p++; |
| 6572 | *p++ = DW_CFA_advance_loc + 4; |
| 6573 | *p++ = DW_CFA_restore_extended; |
| 6574 | *p++ = 65; |
| 6575 | } |
| 6576 | BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) |
| 6577 | == htab->glink_eh_frame->size); |
| 6578 | } |
| 6579 | |
| 6580 | return TRUE; |
| 6581 | } |
| 6582 | |
| 6583 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
| 6584 | |
| 6585 | static bfd_boolean |
| 6586 | ppc_elf_hash_symbol (struct elf_link_hash_entry *h) |
| 6587 | { |
| 6588 | if (h->plt.plist != NULL |
| 6589 | && !h->def_regular |
| 6590 | && (!h->pointer_equality_needed |
| 6591 | || !h->ref_regular_nonweak)) |
| 6592 | return FALSE; |
| 6593 | |
| 6594 | return _bfd_elf_hash_symbol (h); |
| 6595 | } |
| 6596 | \f |
| 6597 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
| 6598 | |
| 6599 | /* Relaxation trampolines. r12 is available for clobbering (r11, is |
| 6600 | used for some functions that are allowed to break the ABI). */ |
| 6601 | static const int shared_stub_entry[] = |
| 6602 | { |
| 6603 | 0x7c0802a6, /* mflr 0 */ |
| 6604 | 0x429f0005, /* bcl 20, 31, .Lxxx */ |
| 6605 | 0x7d8802a6, /* mflr 12 */ |
| 6606 | 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ |
| 6607 | 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */ |
| 6608 | 0x7c0803a6, /* mtlr 0 */ |
| 6609 | 0x7d8903a6, /* mtctr 12 */ |
| 6610 | 0x4e800420, /* bctr */ |
| 6611 | }; |
| 6612 | |
| 6613 | static const int stub_entry[] = |
| 6614 | { |
| 6615 | 0x3d800000, /* lis 12,xxx@ha */ |
| 6616 | 0x398c0000, /* addi 12,12,xxx@l */ |
| 6617 | 0x7d8903a6, /* mtctr 12 */ |
| 6618 | 0x4e800420, /* bctr */ |
| 6619 | }; |
| 6620 | |
| 6621 | static bfd_boolean |
| 6622 | ppc_elf_relax_section (bfd *abfd, |
| 6623 | asection *isec, |
| 6624 | struct bfd_link_info *link_info, |
| 6625 | bfd_boolean *again) |
| 6626 | { |
| 6627 | struct one_fixup |
| 6628 | { |
| 6629 | struct one_fixup *next; |
| 6630 | asection *tsec; |
| 6631 | /* Final link, can use the symbol offset. For a |
| 6632 | relocatable link we use the symbol's index. */ |
| 6633 | bfd_vma toff; |
| 6634 | bfd_vma trampoff; |
| 6635 | }; |
| 6636 | |
| 6637 | Elf_Internal_Shdr *symtab_hdr; |
| 6638 | bfd_byte *contents = NULL; |
| 6639 | Elf_Internal_Sym *isymbuf = NULL; |
| 6640 | Elf_Internal_Rela *internal_relocs = NULL; |
| 6641 | Elf_Internal_Rela *irel, *irelend; |
| 6642 | struct one_fixup *fixups = NULL; |
| 6643 | unsigned changes = 0; |
| 6644 | struct ppc_elf_link_hash_table *htab; |
| 6645 | bfd_size_type trampoff; |
| 6646 | asection *got2; |
| 6647 | bfd_boolean maybe_pasted; |
| 6648 | |
| 6649 | *again = FALSE; |
| 6650 | |
| 6651 | /* Nothing to do if there are no relocations, and no need to do |
| 6652 | anything with non-alloc or non-code sections. */ |
| 6653 | if ((isec->flags & SEC_ALLOC) == 0 |
| 6654 | || (isec->flags & SEC_CODE) == 0 |
| 6655 | || (isec->flags & SEC_RELOC) == 0 |
| 6656 | || isec->reloc_count == 0) |
| 6657 | return TRUE; |
| 6658 | |
| 6659 | /* We cannot represent the required PIC relocs in the output, so don't |
| 6660 | do anything. The linker doesn't support mixing -shared and -r |
| 6661 | anyway. */ |
| 6662 | if (link_info->relocatable && link_info->shared) |
| 6663 | return TRUE; |
| 6664 | |
| 6665 | trampoff = (isec->size + 3) & (bfd_vma) -4; |
| 6666 | maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 |
| 6667 | || strcmp (isec->output_section->name, ".fini") == 0); |
| 6668 | /* Space for a branch around any trampolines. */ |
| 6669 | if (maybe_pasted) |
| 6670 | trampoff += 4; |
| 6671 | |
| 6672 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 6673 | |
| 6674 | /* Get a copy of the native relocations. */ |
| 6675 | internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, |
| 6676 | link_info->keep_memory); |
| 6677 | if (internal_relocs == NULL) |
| 6678 | goto error_return; |
| 6679 | |
| 6680 | htab = ppc_elf_hash_table (link_info); |
| 6681 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
| 6682 | |
| 6683 | irelend = internal_relocs + isec->reloc_count; |
| 6684 | for (irel = internal_relocs; irel < irelend; irel++) |
| 6685 | { |
| 6686 | unsigned long r_type = ELF32_R_TYPE (irel->r_info); |
| 6687 | bfd_vma toff, roff; |
| 6688 | asection *tsec; |
| 6689 | struct one_fixup *f; |
| 6690 | size_t insn_offset = 0; |
| 6691 | bfd_vma max_branch_offset, val; |
| 6692 | bfd_byte *hit_addr; |
| 6693 | unsigned long t0; |
| 6694 | struct elf_link_hash_entry *h; |
| 6695 | struct plt_entry **plist; |
| 6696 | unsigned char sym_type; |
| 6697 | |
| 6698 | switch (r_type) |
| 6699 | { |
| 6700 | case R_PPC_REL24: |
| 6701 | case R_PPC_LOCAL24PC: |
| 6702 | case R_PPC_PLTREL24: |
| 6703 | max_branch_offset = 1 << 25; |
| 6704 | break; |
| 6705 | |
| 6706 | case R_PPC_REL14: |
| 6707 | case R_PPC_REL14_BRTAKEN: |
| 6708 | case R_PPC_REL14_BRNTAKEN: |
| 6709 | max_branch_offset = 1 << 15; |
| 6710 | break; |
| 6711 | |
| 6712 | default: |
| 6713 | continue; |
| 6714 | } |
| 6715 | |
| 6716 | /* Get the value of the symbol referred to by the reloc. */ |
| 6717 | h = NULL; |
| 6718 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 6719 | { |
| 6720 | /* A local symbol. */ |
| 6721 | Elf_Internal_Sym *isym; |
| 6722 | |
| 6723 | /* Read this BFD's local symbols. */ |
| 6724 | if (isymbuf == NULL) |
| 6725 | { |
| 6726 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 6727 | if (isymbuf == NULL) |
| 6728 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 6729 | symtab_hdr->sh_info, 0, |
| 6730 | NULL, NULL, NULL); |
| 6731 | if (isymbuf == 0) |
| 6732 | goto error_return; |
| 6733 | } |
| 6734 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 6735 | if (isym->st_shndx == SHN_UNDEF) |
| 6736 | tsec = bfd_und_section_ptr; |
| 6737 | else if (isym->st_shndx == SHN_ABS) |
| 6738 | tsec = bfd_abs_section_ptr; |
| 6739 | else if (isym->st_shndx == SHN_COMMON) |
| 6740 | tsec = bfd_com_section_ptr; |
| 6741 | else |
| 6742 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 6743 | |
| 6744 | toff = isym->st_value; |
| 6745 | sym_type = ELF_ST_TYPE (isym->st_info); |
| 6746 | } |
| 6747 | else |
| 6748 | { |
| 6749 | /* Global symbol handling. */ |
| 6750 | unsigned long indx; |
| 6751 | |
| 6752 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 6753 | h = elf_sym_hashes (abfd)[indx]; |
| 6754 | |
| 6755 | while (h->root.type == bfd_link_hash_indirect |
| 6756 | || h->root.type == bfd_link_hash_warning) |
| 6757 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6758 | |
| 6759 | if (h->root.type == bfd_link_hash_defined |
| 6760 | || h->root.type == bfd_link_hash_defweak) |
| 6761 | { |
| 6762 | tsec = h->root.u.def.section; |
| 6763 | toff = h->root.u.def.value; |
| 6764 | } |
| 6765 | else if (h->root.type == bfd_link_hash_undefined |
| 6766 | || h->root.type == bfd_link_hash_undefweak) |
| 6767 | { |
| 6768 | tsec = bfd_und_section_ptr; |
| 6769 | toff = link_info->relocatable ? indx : 0; |
| 6770 | } |
| 6771 | else |
| 6772 | continue; |
| 6773 | |
| 6774 | sym_type = h->type; |
| 6775 | } |
| 6776 | |
| 6777 | /* The condition here under which we call find_plt_ent must |
| 6778 | match that in relocate_section. If we call find_plt_ent here |
| 6779 | but not in relocate_section, or vice versa, then the branch |
| 6780 | destination used here may be incorrect. */ |
| 6781 | plist = NULL; |
| 6782 | if (h != NULL) |
| 6783 | { |
| 6784 | /* We know is_branch_reloc (r_type) is true. */ |
| 6785 | if (h->type == STT_GNU_IFUNC |
| 6786 | || r_type == R_PPC_PLTREL24) |
| 6787 | plist = &h->plt.plist; |
| 6788 | } |
| 6789 | else if (sym_type == STT_GNU_IFUNC |
| 6790 | && elf_local_got_offsets (abfd) != NULL) |
| 6791 | { |
| 6792 | bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); |
| 6793 | struct plt_entry **local_plt = (struct plt_entry **) |
| 6794 | (local_got_offsets + symtab_hdr->sh_info); |
| 6795 | plist = local_plt + ELF32_R_SYM (irel->r_info); |
| 6796 | } |
| 6797 | if (plist != NULL) |
| 6798 | { |
| 6799 | bfd_vma addend = 0; |
| 6800 | struct plt_entry *ent; |
| 6801 | |
| 6802 | if (r_type == R_PPC_PLTREL24 && link_info->shared) |
| 6803 | addend = irel->r_addend; |
| 6804 | ent = find_plt_ent (plist, got2, addend); |
| 6805 | if (ent != NULL) |
| 6806 | { |
| 6807 | if (htab->plt_type == PLT_NEW |
| 6808 | || h == NULL |
| 6809 | || !htab->elf.dynamic_sections_created |
| 6810 | || h->dynindx == -1) |
| 6811 | { |
| 6812 | tsec = htab->glink; |
| 6813 | toff = ent->glink_offset; |
| 6814 | } |
| 6815 | else |
| 6816 | { |
| 6817 | tsec = htab->plt; |
| 6818 | toff = ent->plt.offset; |
| 6819 | } |
| 6820 | } |
| 6821 | } |
| 6822 | |
| 6823 | /* If the branch and target are in the same section, you have |
| 6824 | no hope of adding stubs. We'll error out later should the |
| 6825 | branch overflow. */ |
| 6826 | if (tsec == isec) |
| 6827 | continue; |
| 6828 | |
| 6829 | /* There probably isn't any reason to handle symbols in |
| 6830 | SEC_MERGE sections; SEC_MERGE doesn't seem a likely |
| 6831 | attribute for a code section, and we are only looking at |
| 6832 | branches. However, implement it correctly here as a |
| 6833 | reference for other target relax_section functions. */ |
| 6834 | if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) |
| 6835 | { |
| 6836 | /* At this stage in linking, no SEC_MERGE symbol has been |
| 6837 | adjusted, so all references to such symbols need to be |
| 6838 | passed through _bfd_merged_section_offset. (Later, in |
| 6839 | relocate_section, all SEC_MERGE symbols *except* for |
| 6840 | section symbols have been adjusted.) |
| 6841 | |
| 6842 | gas may reduce relocations against symbols in SEC_MERGE |
| 6843 | sections to a relocation against the section symbol when |
| 6844 | the original addend was zero. When the reloc is against |
| 6845 | a section symbol we should include the addend in the |
| 6846 | offset passed to _bfd_merged_section_offset, since the |
| 6847 | location of interest is the original symbol. On the |
| 6848 | other hand, an access to "sym+addend" where "sym" is not |
| 6849 | a section symbol should not include the addend; Such an |
| 6850 | access is presumed to be an offset from "sym"; The |
| 6851 | location of interest is just "sym". */ |
| 6852 | if (sym_type == STT_SECTION) |
| 6853 | toff += irel->r_addend; |
| 6854 | |
| 6855 | toff = _bfd_merged_section_offset (abfd, &tsec, |
| 6856 | elf_section_data (tsec)->sec_info, |
| 6857 | toff); |
| 6858 | |
| 6859 | if (sym_type != STT_SECTION) |
| 6860 | toff += irel->r_addend; |
| 6861 | } |
| 6862 | /* PLTREL24 addends are special. */ |
| 6863 | else if (r_type != R_PPC_PLTREL24) |
| 6864 | toff += irel->r_addend; |
| 6865 | |
| 6866 | /* Attempted -shared link of non-pic code loses. */ |
| 6867 | if (tsec->output_section == NULL) |
| 6868 | continue; |
| 6869 | |
| 6870 | roff = irel->r_offset; |
| 6871 | |
| 6872 | /* If the branch is in range, no need to do anything. */ |
| 6873 | if (tsec != bfd_und_section_ptr |
| 6874 | && (!link_info->relocatable |
| 6875 | /* A relocatable link may have sections moved during |
| 6876 | final link, so do not presume they remain in range. */ |
| 6877 | || tsec->output_section == isec->output_section)) |
| 6878 | { |
| 6879 | bfd_vma symaddr, reladdr; |
| 6880 | |
| 6881 | symaddr = tsec->output_section->vma + tsec->output_offset + toff; |
| 6882 | reladdr = isec->output_section->vma + isec->output_offset + roff; |
| 6883 | if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) |
| 6884 | continue; |
| 6885 | } |
| 6886 | |
| 6887 | /* Look for an existing fixup to this address. */ |
| 6888 | for (f = fixups; f ; f = f->next) |
| 6889 | if (f->tsec == tsec && f->toff == toff) |
| 6890 | break; |
| 6891 | |
| 6892 | if (f == NULL) |
| 6893 | { |
| 6894 | size_t size; |
| 6895 | unsigned long stub_rtype; |
| 6896 | |
| 6897 | val = trampoff - roff; |
| 6898 | if (val >= max_branch_offset) |
| 6899 | /* Oh dear, we can't reach a trampoline. Don't try to add |
| 6900 | one. We'll report an error later. */ |
| 6901 | continue; |
| 6902 | |
| 6903 | if (link_info->shared) |
| 6904 | { |
| 6905 | size = 4 * ARRAY_SIZE (shared_stub_entry); |
| 6906 | insn_offset = 12; |
| 6907 | } |
| 6908 | else |
| 6909 | { |
| 6910 | size = 4 * ARRAY_SIZE (stub_entry); |
| 6911 | insn_offset = 0; |
| 6912 | } |
| 6913 | stub_rtype = R_PPC_RELAX; |
| 6914 | if (tsec == htab->plt |
| 6915 | || tsec == htab->glink) |
| 6916 | { |
| 6917 | stub_rtype = R_PPC_RELAX_PLT; |
| 6918 | if (r_type == R_PPC_PLTREL24) |
| 6919 | stub_rtype = R_PPC_RELAX_PLTREL24; |
| 6920 | } |
| 6921 | |
| 6922 | /* Hijack the old relocation. Since we need two |
| 6923 | relocations for this use a "composite" reloc. */ |
| 6924 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 6925 | stub_rtype); |
| 6926 | irel->r_offset = trampoff + insn_offset; |
| 6927 | if (r_type == R_PPC_PLTREL24 |
| 6928 | && stub_rtype != R_PPC_RELAX_PLTREL24) |
| 6929 | irel->r_addend = 0; |
| 6930 | |
| 6931 | /* Record the fixup so we don't do it again this section. */ |
| 6932 | f = bfd_malloc (sizeof (*f)); |
| 6933 | f->next = fixups; |
| 6934 | f->tsec = tsec; |
| 6935 | f->toff = toff; |
| 6936 | f->trampoff = trampoff; |
| 6937 | fixups = f; |
| 6938 | |
| 6939 | trampoff += size; |
| 6940 | changes++; |
| 6941 | } |
| 6942 | else |
| 6943 | { |
| 6944 | val = f->trampoff - roff; |
| 6945 | if (val >= max_branch_offset) |
| 6946 | continue; |
| 6947 | |
| 6948 | /* Nop out the reloc, since we're finalizing things here. */ |
| 6949 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 6950 | } |
| 6951 | |
| 6952 | /* Get the section contents. */ |
| 6953 | if (contents == NULL) |
| 6954 | { |
| 6955 | /* Get cached copy if it exists. */ |
| 6956 | if (elf_section_data (isec)->this_hdr.contents != NULL) |
| 6957 | contents = elf_section_data (isec)->this_hdr.contents; |
| 6958 | else |
| 6959 | { |
| 6960 | /* Go get them off disk. */ |
| 6961 | if (!bfd_malloc_and_get_section (abfd, isec, &contents)) |
| 6962 | goto error_return; |
| 6963 | } |
| 6964 | } |
| 6965 | |
| 6966 | /* Fix up the existing branch to hit the trampoline. */ |
| 6967 | hit_addr = contents + roff; |
| 6968 | switch (r_type) |
| 6969 | { |
| 6970 | case R_PPC_REL24: |
| 6971 | case R_PPC_LOCAL24PC: |
| 6972 | case R_PPC_PLTREL24: |
| 6973 | t0 = bfd_get_32 (abfd, hit_addr); |
| 6974 | t0 &= ~0x3fffffc; |
| 6975 | t0 |= val & 0x3fffffc; |
| 6976 | bfd_put_32 (abfd, t0, hit_addr); |
| 6977 | break; |
| 6978 | |
| 6979 | case R_PPC_REL14: |
| 6980 | case R_PPC_REL14_BRTAKEN: |
| 6981 | case R_PPC_REL14_BRNTAKEN: |
| 6982 | t0 = bfd_get_32 (abfd, hit_addr); |
| 6983 | t0 &= ~0xfffc; |
| 6984 | t0 |= val & 0xfffc; |
| 6985 | bfd_put_32 (abfd, t0, hit_addr); |
| 6986 | break; |
| 6987 | } |
| 6988 | } |
| 6989 | |
| 6990 | /* Write out the trampolines. */ |
| 6991 | if (fixups != NULL) |
| 6992 | { |
| 6993 | const int *stub; |
| 6994 | bfd_byte *dest; |
| 6995 | int i, size; |
| 6996 | |
| 6997 | do |
| 6998 | { |
| 6999 | struct one_fixup *f = fixups; |
| 7000 | fixups = fixups->next; |
| 7001 | free (f); |
| 7002 | } |
| 7003 | while (fixups); |
| 7004 | |
| 7005 | contents = bfd_realloc_or_free (contents, trampoff); |
| 7006 | if (contents == NULL) |
| 7007 | goto error_return; |
| 7008 | |
| 7009 | isec->size = (isec->size + 3) & (bfd_vma) -4; |
| 7010 | dest = contents + isec->size; |
| 7011 | /* Branch around the trampolines. */ |
| 7012 | if (maybe_pasted) |
| 7013 | { |
| 7014 | bfd_vma val = B + trampoff - isec->size; |
| 7015 | bfd_put_32 (abfd, val, dest); |
| 7016 | dest += 4; |
| 7017 | } |
| 7018 | isec->size = trampoff; |
| 7019 | |
| 7020 | if (link_info->shared) |
| 7021 | { |
| 7022 | stub = shared_stub_entry; |
| 7023 | size = ARRAY_SIZE (shared_stub_entry); |
| 7024 | } |
| 7025 | else |
| 7026 | { |
| 7027 | stub = stub_entry; |
| 7028 | size = ARRAY_SIZE (stub_entry); |
| 7029 | } |
| 7030 | |
| 7031 | i = 0; |
| 7032 | while (dest < contents + trampoff) |
| 7033 | { |
| 7034 | bfd_put_32 (abfd, stub[i], dest); |
| 7035 | i++; |
| 7036 | if (i == size) |
| 7037 | i = 0; |
| 7038 | dest += 4; |
| 7039 | } |
| 7040 | BFD_ASSERT (i == 0); |
| 7041 | } |
| 7042 | |
| 7043 | if (isymbuf != NULL |
| 7044 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 7045 | { |
| 7046 | if (! link_info->keep_memory) |
| 7047 | free (isymbuf); |
| 7048 | else |
| 7049 | { |
| 7050 | /* Cache the symbols for elf_link_input_bfd. */ |
| 7051 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 7052 | } |
| 7053 | } |
| 7054 | |
| 7055 | if (contents != NULL |
| 7056 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 7057 | { |
| 7058 | if (!changes && !link_info->keep_memory) |
| 7059 | free (contents); |
| 7060 | else |
| 7061 | { |
| 7062 | /* Cache the section contents for elf_link_input_bfd. */ |
| 7063 | elf_section_data (isec)->this_hdr.contents = contents; |
| 7064 | } |
| 7065 | } |
| 7066 | |
| 7067 | if (changes != 0) |
| 7068 | { |
| 7069 | /* Append sufficient NOP relocs so we can write out relocation |
| 7070 | information for the trampolines. */ |
| 7071 | Elf_Internal_Shdr *rel_hdr; |
| 7072 | Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) |
| 7073 | * sizeof (*new_relocs)); |
| 7074 | unsigned ix; |
| 7075 | |
| 7076 | if (!new_relocs) |
| 7077 | goto error_return; |
| 7078 | memcpy (new_relocs, internal_relocs, |
| 7079 | isec->reloc_count * sizeof (*new_relocs)); |
| 7080 | for (ix = changes; ix--;) |
| 7081 | { |
| 7082 | irel = new_relocs + ix + isec->reloc_count; |
| 7083 | |
| 7084 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 7085 | } |
| 7086 | if (internal_relocs != elf_section_data (isec)->relocs) |
| 7087 | free (internal_relocs); |
| 7088 | elf_section_data (isec)->relocs = new_relocs; |
| 7089 | isec->reloc_count += changes; |
| 7090 | rel_hdr = _bfd_elf_single_rel_hdr (isec); |
| 7091 | rel_hdr->sh_size += changes * rel_hdr->sh_entsize; |
| 7092 | } |
| 7093 | else if (elf_section_data (isec)->relocs != internal_relocs) |
| 7094 | free (internal_relocs); |
| 7095 | |
| 7096 | *again = changes != 0; |
| 7097 | if (!*again && link_info->relocatable) |
| 7098 | { |
| 7099 | /* Convert the internal relax relocs to external form. */ |
| 7100 | for (irel = internal_relocs; irel < irelend; irel++) |
| 7101 | if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX) |
| 7102 | { |
| 7103 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); |
| 7104 | |
| 7105 | /* Rewrite the reloc and convert one of the trailing nop |
| 7106 | relocs to describe this relocation. */ |
| 7107 | BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE); |
| 7108 | /* The relocs are at the bottom 2 bytes */ |
| 7109 | irel[0].r_offset += 2; |
| 7110 | memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel)); |
| 7111 | irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); |
| 7112 | irel[1].r_offset += 4; |
| 7113 | irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); |
| 7114 | irel++; |
| 7115 | } |
| 7116 | } |
| 7117 | |
| 7118 | return TRUE; |
| 7119 | |
| 7120 | error_return: |
| 7121 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
| 7122 | free (isymbuf); |
| 7123 | if (contents != NULL |
| 7124 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 7125 | free (contents); |
| 7126 | if (internal_relocs != NULL |
| 7127 | && elf_section_data (isec)->relocs != internal_relocs) |
| 7128 | free (internal_relocs); |
| 7129 | return FALSE; |
| 7130 | } |
| 7131 | \f |
| 7132 | /* What to do when ld finds relocations against symbols defined in |
| 7133 | discarded sections. */ |
| 7134 | |
| 7135 | static unsigned int |
| 7136 | ppc_elf_action_discarded (asection *sec) |
| 7137 | { |
| 7138 | if (strcmp (".fixup", sec->name) == 0) |
| 7139 | return 0; |
| 7140 | |
| 7141 | if (strcmp (".got2", sec->name) == 0) |
| 7142 | return 0; |
| 7143 | |
| 7144 | return _bfd_elf_default_action_discarded (sec); |
| 7145 | } |
| 7146 | \f |
| 7147 | /* Fill in the address for a pointer generated in a linker section. */ |
| 7148 | |
| 7149 | static bfd_vma |
| 7150 | elf_finish_pointer_linker_section (bfd *input_bfd, |
| 7151 | elf_linker_section_t *lsect, |
| 7152 | struct elf_link_hash_entry *h, |
| 7153 | bfd_vma relocation, |
| 7154 | const Elf_Internal_Rela *rel) |
| 7155 | { |
| 7156 | elf_linker_section_pointers_t *linker_section_ptr; |
| 7157 | |
| 7158 | BFD_ASSERT (lsect != NULL); |
| 7159 | |
| 7160 | if (h != NULL) |
| 7161 | { |
| 7162 | /* Handle global symbol. */ |
| 7163 | struct ppc_elf_link_hash_entry *eh; |
| 7164 | |
| 7165 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 7166 | BFD_ASSERT (eh->elf.def_regular); |
| 7167 | linker_section_ptr = eh->linker_section_pointer; |
| 7168 | } |
| 7169 | else |
| 7170 | { |
| 7171 | /* Handle local symbol. */ |
| 7172 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 7173 | |
| 7174 | BFD_ASSERT (is_ppc_elf (input_bfd)); |
| 7175 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); |
| 7176 | linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; |
| 7177 | } |
| 7178 | |
| 7179 | linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, |
| 7180 | rel->r_addend, |
| 7181 | lsect); |
| 7182 | BFD_ASSERT (linker_section_ptr != NULL); |
| 7183 | |
| 7184 | /* Offset will always be a multiple of four, so use the bottom bit |
| 7185 | as a "written" flag. */ |
| 7186 | if ((linker_section_ptr->offset & 1) == 0) |
| 7187 | { |
| 7188 | bfd_put_32 (lsect->section->owner, |
| 7189 | relocation + linker_section_ptr->addend, |
| 7190 | lsect->section->contents + linker_section_ptr->offset); |
| 7191 | linker_section_ptr->offset += 1; |
| 7192 | } |
| 7193 | |
| 7194 | relocation = (lsect->section->output_section->vma |
| 7195 | + lsect->section->output_offset |
| 7196 | + linker_section_ptr->offset - 1 |
| 7197 | - SYM_VAL (lsect->sym)); |
| 7198 | |
| 7199 | #ifdef DEBUG |
| 7200 | fprintf (stderr, |
| 7201 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", |
| 7202 | lsect->name, (long) relocation, (long) relocation); |
| 7203 | #endif |
| 7204 | |
| 7205 | return relocation; |
| 7206 | } |
| 7207 | |
| 7208 | #define PPC_LO(v) ((v) & 0xffff) |
| 7209 | #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| 7210 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| 7211 | |
| 7212 | static void |
| 7213 | write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, |
| 7214 | struct bfd_link_info *info) |
| 7215 | { |
| 7216 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 7217 | bfd *output_bfd = info->output_bfd; |
| 7218 | bfd_vma plt; |
| 7219 | |
| 7220 | plt = ((ent->plt.offset & ~1) |
| 7221 | + plt_sec->output_section->vma |
| 7222 | + plt_sec->output_offset); |
| 7223 | |
| 7224 | if (info->shared) |
| 7225 | { |
| 7226 | bfd_vma got = 0; |
| 7227 | |
| 7228 | if (ent->addend >= 32768) |
| 7229 | got = (ent->addend |
| 7230 | + ent->sec->output_section->vma |
| 7231 | + ent->sec->output_offset); |
| 7232 | else if (htab->elf.hgot != NULL) |
| 7233 | got = SYM_VAL (htab->elf.hgot); |
| 7234 | |
| 7235 | plt -= got; |
| 7236 | |
| 7237 | if (plt + 0x8000 < 0x10000) |
| 7238 | { |
| 7239 | bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); |
| 7240 | p += 4; |
| 7241 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 7242 | p += 4; |
| 7243 | bfd_put_32 (output_bfd, BCTR, p); |
| 7244 | p += 4; |
| 7245 | bfd_put_32 (output_bfd, NOP, p); |
| 7246 | p += 4; |
| 7247 | } |
| 7248 | else |
| 7249 | { |
| 7250 | bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); |
| 7251 | p += 4; |
| 7252 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); |
| 7253 | p += 4; |
| 7254 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 7255 | p += 4; |
| 7256 | bfd_put_32 (output_bfd, BCTR, p); |
| 7257 | p += 4; |
| 7258 | } |
| 7259 | } |
| 7260 | else |
| 7261 | { |
| 7262 | bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); |
| 7263 | p += 4; |
| 7264 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); |
| 7265 | p += 4; |
| 7266 | bfd_put_32 (output_bfd, MTCTR_11, p); |
| 7267 | p += 4; |
| 7268 | bfd_put_32 (output_bfd, BCTR, p); |
| 7269 | p += 4; |
| 7270 | } |
| 7271 | } |
| 7272 | |
| 7273 | /* Return true if symbol is defined statically. */ |
| 7274 | |
| 7275 | static bfd_boolean |
| 7276 | is_static_defined (struct elf_link_hash_entry *h) |
| 7277 | { |
| 7278 | return ((h->root.type == bfd_link_hash_defined |
| 7279 | || h->root.type == bfd_link_hash_defweak) |
| 7280 | && h->root.u.def.section != NULL |
| 7281 | && h->root.u.def.section->output_section != NULL); |
| 7282 | } |
| 7283 | |
| 7284 | /* If INSN is an opcode that may be used with an @tls operand, return |
| 7285 | the transformed insn for TLS optimisation, otherwise return 0. If |
| 7286 | REG is non-zero only match an insn with RB or RA equal to REG. */ |
| 7287 | |
| 7288 | unsigned int |
| 7289 | _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) |
| 7290 | { |
| 7291 | unsigned int rtra; |
| 7292 | |
| 7293 | if ((insn & (0x3f << 26)) != 31 << 26) |
| 7294 | return 0; |
| 7295 | |
| 7296 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) |
| 7297 | rtra = insn & ((1 << 26) - (1 << 16)); |
| 7298 | else if (((insn >> 16) & 0x1f) == reg) |
| 7299 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); |
| 7300 | else |
| 7301 | return 0; |
| 7302 | |
| 7303 | if ((insn & (0x3ff << 1)) == 266 << 1) |
| 7304 | /* add -> addi. */ |
| 7305 | insn = 14 << 26; |
| 7306 | else if ((insn & (0x1f << 1)) == 23 << 1 |
| 7307 | && ((insn & (0x1f << 6)) < 14 << 6 |
| 7308 | || ((insn & (0x1f << 6)) >= 16 << 6 |
| 7309 | && (insn & (0x1f << 6)) < 24 << 6))) |
| 7310 | /* load and store indexed -> dform. */ |
| 7311 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; |
| 7312 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) |
| 7313 | /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| 7314 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); |
| 7315 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) |
| 7316 | /* lwax -> lwa. */ |
| 7317 | insn = (58 << 26) | 2; |
| 7318 | else |
| 7319 | return 0; |
| 7320 | insn |= rtra; |
| 7321 | return insn; |
| 7322 | } |
| 7323 | |
| 7324 | /* If INSN is an opcode that may be used with an @tprel operand, return |
| 7325 | the transformed insn for an undefined weak symbol, ie. with the |
| 7326 | thread pointer REG operand removed. Otherwise return 0. */ |
| 7327 | |
| 7328 | unsigned int |
| 7329 | _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) |
| 7330 | { |
| 7331 | if ((insn & (0x1f << 16)) == reg << 16 |
| 7332 | && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ |
| 7333 | || (insn & (0x3f << 26)) == 15u << 26 /* addis */ |
| 7334 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ |
| 7335 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ |
| 7336 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ |
| 7337 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ |
| 7338 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ |
| 7339 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ |
| 7340 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ |
| 7341 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ |
| 7342 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ |
| 7343 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ |
| 7344 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ |
| 7345 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ |
| 7346 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ |
| 7347 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ |
| 7348 | && (insn & 3) != 1) |
| 7349 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ |
| 7350 | && ((insn & 3) == 0 || (insn & 3) == 3)))) |
| 7351 | { |
| 7352 | insn &= ~(0x1f << 16); |
| 7353 | } |
| 7354 | else if ((insn & (0x1f << 21)) == reg << 21 |
| 7355 | && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ |
| 7356 | || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ |
| 7357 | || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) |
| 7358 | { |
| 7359 | insn &= ~(0x1f << 21); |
| 7360 | insn |= (insn & (0x1f << 16)) << 5; |
| 7361 | if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) |
| 7362 | insn -= 2 >> 26; /* convert to ori,oris */ |
| 7363 | } |
| 7364 | else |
| 7365 | insn = 0; |
| 7366 | return insn; |
| 7367 | } |
| 7368 | |
| 7369 | static bfd_boolean |
| 7370 | is_insn_ds_form (unsigned int insn) |
| 7371 | { |
| 7372 | return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ |
| 7373 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ |
| 7374 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ |
| 7375 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); |
| 7376 | } |
| 7377 | |
| 7378 | static bfd_boolean |
| 7379 | is_insn_dq_form (unsigned int insn) |
| 7380 | { |
| 7381 | return (insn & (0x3f << 26)) == 56u << 26; /* lq */ |
| 7382 | } |
| 7383 | |
| 7384 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 7385 | to handle the relocations for a section. |
| 7386 | |
| 7387 | The relocs are always passed as Rela structures; if the section |
| 7388 | actually uses Rel structures, the r_addend field will always be |
| 7389 | zero. |
| 7390 | |
| 7391 | This function is responsible for adjust the section contents as |
| 7392 | necessary, and (if using Rela relocs and generating a |
| 7393 | relocatable output file) adjusting the reloc addend as |
| 7394 | necessary. |
| 7395 | |
| 7396 | This function does not have to worry about setting the reloc |
| 7397 | address or the reloc symbol index. |
| 7398 | |
| 7399 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 7400 | |
| 7401 | LOCAL_SECTIONS is an array giving the section in the input file |
| 7402 | corresponding to the st_shndx field of each local symbol. |
| 7403 | |
| 7404 | The global hash table entry for the global symbols can be found |
| 7405 | via elf_sym_hashes (input_bfd). |
| 7406 | |
| 7407 | When generating relocatable output, this function must handle |
| 7408 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 7409 | going to be the section symbol corresponding to the output |
| 7410 | section, which means that the addend must be adjusted |
| 7411 | accordingly. */ |
| 7412 | |
| 7413 | static bfd_boolean |
| 7414 | ppc_elf_relocate_section (bfd *output_bfd, |
| 7415 | struct bfd_link_info *info, |
| 7416 | bfd *input_bfd, |
| 7417 | asection *input_section, |
| 7418 | bfd_byte *contents, |
| 7419 | Elf_Internal_Rela *relocs, |
| 7420 | Elf_Internal_Sym *local_syms, |
| 7421 | asection **local_sections) |
| 7422 | { |
| 7423 | Elf_Internal_Shdr *symtab_hdr; |
| 7424 | struct elf_link_hash_entry **sym_hashes; |
| 7425 | struct ppc_elf_link_hash_table *htab; |
| 7426 | Elf_Internal_Rela *rel; |
| 7427 | Elf_Internal_Rela *relend; |
| 7428 | Elf_Internal_Rela outrel; |
| 7429 | asection *got2; |
| 7430 | bfd_vma *local_got_offsets; |
| 7431 | bfd_boolean ret = TRUE; |
| 7432 | bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); |
| 7433 | bfd_boolean is_vxworks_tls; |
| 7434 | |
| 7435 | #ifdef DEBUG |
| 7436 | _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " |
| 7437 | "%ld relocations%s", |
| 7438 | input_bfd, input_section, |
| 7439 | (long) input_section->reloc_count, |
| 7440 | (info->relocatable) ? " (relocatable)" : ""); |
| 7441 | #endif |
| 7442 | |
| 7443 | got2 = bfd_get_section_by_name (input_bfd, ".got2"); |
| 7444 | |
| 7445 | /* Initialize howto table if not already done. */ |
| 7446 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 7447 | ppc_elf_howto_init (); |
| 7448 | |
| 7449 | htab = ppc_elf_hash_table (info); |
| 7450 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 7451 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 7452 | sym_hashes = elf_sym_hashes (input_bfd); |
| 7453 | /* We have to handle relocations in vxworks .tls_vars sections |
| 7454 | specially, because the dynamic loader is 'weird'. */ |
| 7455 | is_vxworks_tls = (htab->is_vxworks && info->shared |
| 7456 | && !strcmp (input_section->output_section->name, |
| 7457 | ".tls_vars")); |
| 7458 | rel = relocs; |
| 7459 | relend = relocs + input_section->reloc_count; |
| 7460 | for (; rel < relend; rel++) |
| 7461 | { |
| 7462 | enum elf_ppc_reloc_type r_type; |
| 7463 | bfd_vma addend; |
| 7464 | bfd_reloc_status_type r; |
| 7465 | Elf_Internal_Sym *sym; |
| 7466 | asection *sec; |
| 7467 | struct elf_link_hash_entry *h; |
| 7468 | const char *sym_name; |
| 7469 | reloc_howto_type *howto; |
| 7470 | unsigned long r_symndx; |
| 7471 | bfd_vma relocation; |
| 7472 | bfd_vma branch_bit, from; |
| 7473 | bfd_boolean unresolved_reloc; |
| 7474 | bfd_boolean warned; |
| 7475 | unsigned int tls_type, tls_mask, tls_gd; |
| 7476 | struct plt_entry **ifunc; |
| 7477 | |
| 7478 | r_type = ELF32_R_TYPE (rel->r_info); |
| 7479 | sym = NULL; |
| 7480 | sec = NULL; |
| 7481 | h = NULL; |
| 7482 | unresolved_reloc = FALSE; |
| 7483 | warned = FALSE; |
| 7484 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 7485 | |
| 7486 | if (r_symndx < symtab_hdr->sh_info) |
| 7487 | { |
| 7488 | sym = local_syms + r_symndx; |
| 7489 | sec = local_sections[r_symndx]; |
| 7490 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 7491 | |
| 7492 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 7493 | } |
| 7494 | else |
| 7495 | { |
| 7496 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 7497 | r_symndx, symtab_hdr, sym_hashes, |
| 7498 | h, sec, relocation, |
| 7499 | unresolved_reloc, warned); |
| 7500 | |
| 7501 | sym_name = h->root.root.string; |
| 7502 | } |
| 7503 | |
| 7504 | if (sec != NULL && discarded_section (sec)) |
| 7505 | { |
| 7506 | /* For relocs against symbols from removed linkonce sections, |
| 7507 | or sections discarded by a linker script, we just want the |
| 7508 | section contents zeroed. Avoid any special processing. */ |
| 7509 | howto = NULL; |
| 7510 | if (r_type < R_PPC_max) |
| 7511 | howto = ppc_elf_howto_table[r_type]; |
| 7512 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 7513 | rel, 1, relend, howto, 0, contents); |
| 7514 | } |
| 7515 | |
| 7516 | if (info->relocatable) |
| 7517 | { |
| 7518 | if (got2 != NULL |
| 7519 | && r_type == R_PPC_PLTREL24 |
| 7520 | && rel->r_addend != 0) |
| 7521 | { |
| 7522 | /* R_PPC_PLTREL24 is rather special. If non-zero, the |
| 7523 | addend specifies the GOT pointer offset within .got2. */ |
| 7524 | rel->r_addend += got2->output_offset; |
| 7525 | } |
| 7526 | continue; |
| 7527 | } |
| 7528 | |
| 7529 | /* TLS optimizations. Replace instruction sequences and relocs |
| 7530 | based on information we collected in tls_optimize. We edit |
| 7531 | RELOCS so that --emit-relocs will output something sensible |
| 7532 | for the final instruction stream. */ |
| 7533 | tls_mask = 0; |
| 7534 | tls_gd = 0; |
| 7535 | if (h != NULL) |
| 7536 | tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; |
| 7537 | else if (local_got_offsets != NULL) |
| 7538 | { |
| 7539 | struct plt_entry **local_plt; |
| 7540 | char *lgot_masks; |
| 7541 | local_plt |
| 7542 | = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); |
| 7543 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); |
| 7544 | tls_mask = lgot_masks[r_symndx]; |
| 7545 | } |
| 7546 | |
| 7547 | /* Ensure reloc mapping code below stays sane. */ |
| 7548 | if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) |
| 7549 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) |
| 7550 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) |
| 7551 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) |
| 7552 | || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) |
| 7553 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) |
| 7554 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) |
| 7555 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) |
| 7556 | abort (); |
| 7557 | switch (r_type) |
| 7558 | { |
| 7559 | default: |
| 7560 | break; |
| 7561 | |
| 7562 | case R_PPC_GOT_TPREL16: |
| 7563 | case R_PPC_GOT_TPREL16_LO: |
| 7564 | if ((tls_mask & TLS_TLS) != 0 |
| 7565 | && (tls_mask & TLS_TPREL) == 0) |
| 7566 | { |
| 7567 | bfd_vma insn; |
| 7568 | |
| 7569 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); |
| 7570 | insn &= 31 << 21; |
| 7571 | insn |= 0x3c020000; /* addis 0,2,0 */ |
| 7572 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); |
| 7573 | r_type = R_PPC_TPREL16_HA; |
| 7574 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7575 | } |
| 7576 | break; |
| 7577 | |
| 7578 | case R_PPC_TLS: |
| 7579 | if ((tls_mask & TLS_TLS) != 0 |
| 7580 | && (tls_mask & TLS_TPREL) == 0) |
| 7581 | { |
| 7582 | bfd_vma insn; |
| 7583 | |
| 7584 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7585 | insn = _bfd_elf_ppc_at_tls_transform (insn, 2); |
| 7586 | if (insn == 0) |
| 7587 | abort (); |
| 7588 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 7589 | r_type = R_PPC_TPREL16_LO; |
| 7590 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7591 | |
| 7592 | /* Was PPC_TLS which sits on insn boundary, now |
| 7593 | PPC_TPREL16_LO which is at low-order half-word. */ |
| 7594 | rel->r_offset += d_offset; |
| 7595 | } |
| 7596 | break; |
| 7597 | |
| 7598 | case R_PPC_GOT_TLSGD16_HI: |
| 7599 | case R_PPC_GOT_TLSGD16_HA: |
| 7600 | tls_gd = TLS_TPRELGD; |
| 7601 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7602 | goto tls_gdld_hi; |
| 7603 | break; |
| 7604 | |
| 7605 | case R_PPC_GOT_TLSLD16_HI: |
| 7606 | case R_PPC_GOT_TLSLD16_HA: |
| 7607 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7608 | { |
| 7609 | tls_gdld_hi: |
| 7610 | if ((tls_mask & tls_gd) != 0) |
| 7611 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 7612 | + R_PPC_GOT_TPREL16); |
| 7613 | else |
| 7614 | { |
| 7615 | bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| 7616 | rel->r_offset -= d_offset; |
| 7617 | r_type = R_PPC_NONE; |
| 7618 | } |
| 7619 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7620 | } |
| 7621 | break; |
| 7622 | |
| 7623 | case R_PPC_GOT_TLSGD16: |
| 7624 | case R_PPC_GOT_TLSGD16_LO: |
| 7625 | tls_gd = TLS_TPRELGD; |
| 7626 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7627 | goto tls_ldgd_opt; |
| 7628 | break; |
| 7629 | |
| 7630 | case R_PPC_GOT_TLSLD16: |
| 7631 | case R_PPC_GOT_TLSLD16_LO: |
| 7632 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7633 | { |
| 7634 | unsigned int insn1, insn2; |
| 7635 | bfd_vma offset; |
| 7636 | |
| 7637 | tls_ldgd_opt: |
| 7638 | offset = (bfd_vma) -1; |
| 7639 | /* If not using the newer R_PPC_TLSGD/LD to mark |
| 7640 | __tls_get_addr calls, we must trust that the call |
| 7641 | stays with its arg setup insns, ie. that the next |
| 7642 | reloc is the __tls_get_addr call associated with |
| 7643 | the current reloc. Edit both insns. */ |
| 7644 | if (input_section->has_tls_get_addr_call |
| 7645 | && rel + 1 < relend |
| 7646 | && branch_reloc_hash_match (input_bfd, rel + 1, |
| 7647 | htab->tls_get_addr)) |
| 7648 | offset = rel[1].r_offset; |
| 7649 | if ((tls_mask & tls_gd) != 0) |
| 7650 | { |
| 7651 | /* IE */ |
| 7652 | insn1 = bfd_get_32 (output_bfd, |
| 7653 | contents + rel->r_offset - d_offset); |
| 7654 | insn1 &= (1 << 26) - 1; |
| 7655 | insn1 |= 32 << 26; /* lwz */ |
| 7656 | if (offset != (bfd_vma) -1) |
| 7657 | { |
| 7658 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7659 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 7660 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7661 | } |
| 7662 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 7663 | + R_PPC_GOT_TPREL16); |
| 7664 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7665 | } |
| 7666 | else |
| 7667 | { |
| 7668 | /* LE */ |
| 7669 | insn1 = 0x3c620000; /* addis 3,2,0 */ |
| 7670 | if (tls_gd == 0) |
| 7671 | { |
| 7672 | /* Was an LD reloc. */ |
| 7673 | for (r_symndx = 0; |
| 7674 | r_symndx < symtab_hdr->sh_info; |
| 7675 | r_symndx++) |
| 7676 | if (local_sections[r_symndx] == sec) |
| 7677 | break; |
| 7678 | if (r_symndx >= symtab_hdr->sh_info) |
| 7679 | r_symndx = STN_UNDEF; |
| 7680 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7681 | if (r_symndx != STN_UNDEF) |
| 7682 | rel->r_addend -= (local_syms[r_symndx].st_value |
| 7683 | + sec->output_offset |
| 7684 | + sec->output_section->vma); |
| 7685 | } |
| 7686 | r_type = R_PPC_TPREL16_HA; |
| 7687 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7688 | if (offset != (bfd_vma) -1) |
| 7689 | { |
| 7690 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); |
| 7691 | rel[1].r_offset = offset + d_offset; |
| 7692 | rel[1].r_addend = rel->r_addend; |
| 7693 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7694 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7695 | } |
| 7696 | } |
| 7697 | bfd_put_32 (output_bfd, insn1, |
| 7698 | contents + rel->r_offset - d_offset); |
| 7699 | if (tls_gd == 0) |
| 7700 | { |
| 7701 | /* We changed the symbol on an LD reloc. Start over |
| 7702 | in order to get h, sym, sec etc. right. */ |
| 7703 | rel--; |
| 7704 | continue; |
| 7705 | } |
| 7706 | } |
| 7707 | break; |
| 7708 | |
| 7709 | case R_PPC_TLSGD: |
| 7710 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 7711 | { |
| 7712 | unsigned int insn2; |
| 7713 | bfd_vma offset = rel->r_offset; |
| 7714 | |
| 7715 | if ((tls_mask & TLS_TPRELGD) != 0) |
| 7716 | { |
| 7717 | /* IE */ |
| 7718 | r_type = R_PPC_NONE; |
| 7719 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 7720 | } |
| 7721 | else |
| 7722 | { |
| 7723 | /* LE */ |
| 7724 | r_type = R_PPC_TPREL16_LO; |
| 7725 | rel->r_offset += d_offset; |
| 7726 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7727 | } |
| 7728 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 7729 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 7730 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 7731 | BFD_ASSERT (offset == rel[1].r_offset); |
| 7732 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7733 | } |
| 7734 | break; |
| 7735 | |
| 7736 | case R_PPC_TLSLD: |
| 7737 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 7738 | { |
| 7739 | unsigned int insn2; |
| 7740 | |
| 7741 | for (r_symndx = 0; |
| 7742 | r_symndx < symtab_hdr->sh_info; |
| 7743 | r_symndx++) |
| 7744 | if (local_sections[r_symndx] == sec) |
| 7745 | break; |
| 7746 | if (r_symndx >= symtab_hdr->sh_info) |
| 7747 | r_symndx = STN_UNDEF; |
| 7748 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 7749 | if (r_symndx != STN_UNDEF) |
| 7750 | rel->r_addend -= (local_syms[r_symndx].st_value |
| 7751 | + sec->output_offset |
| 7752 | + sec->output_section->vma); |
| 7753 | |
| 7754 | rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); |
| 7755 | rel->r_offset += d_offset; |
| 7756 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 7757 | bfd_put_32 (output_bfd, insn2, |
| 7758 | contents + rel->r_offset - d_offset); |
| 7759 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 7760 | BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); |
| 7761 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
| 7762 | rel--; |
| 7763 | continue; |
| 7764 | } |
| 7765 | break; |
| 7766 | } |
| 7767 | |
| 7768 | /* Handle other relocations that tweak non-addend part of insn. */ |
| 7769 | branch_bit = 0; |
| 7770 | switch (r_type) |
| 7771 | { |
| 7772 | default: |
| 7773 | break; |
| 7774 | |
| 7775 | /* Branch taken prediction relocations. */ |
| 7776 | case R_PPC_ADDR14_BRTAKEN: |
| 7777 | case R_PPC_REL14_BRTAKEN: |
| 7778 | branch_bit = BRANCH_PREDICT_BIT; |
| 7779 | /* Fall thru */ |
| 7780 | |
| 7781 | /* Branch not taken prediction relocations. */ |
| 7782 | case R_PPC_ADDR14_BRNTAKEN: |
| 7783 | case R_PPC_REL14_BRNTAKEN: |
| 7784 | { |
| 7785 | bfd_vma insn; |
| 7786 | |
| 7787 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 7788 | insn &= ~BRANCH_PREDICT_BIT; |
| 7789 | insn |= branch_bit; |
| 7790 | |
| 7791 | from = (rel->r_offset |
| 7792 | + input_section->output_offset |
| 7793 | + input_section->output_section->vma); |
| 7794 | |
| 7795 | /* Invert 'y' bit if not the default. */ |
| 7796 | if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) |
| 7797 | insn ^= BRANCH_PREDICT_BIT; |
| 7798 | |
| 7799 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 7800 | break; |
| 7801 | } |
| 7802 | } |
| 7803 | |
| 7804 | ifunc = NULL; |
| 7805 | if (!htab->is_vxworks) |
| 7806 | { |
| 7807 | struct plt_entry *ent; |
| 7808 | |
| 7809 | if (h != NULL) |
| 7810 | { |
| 7811 | if (h->type == STT_GNU_IFUNC) |
| 7812 | ifunc = &h->plt.plist; |
| 7813 | } |
| 7814 | else if (local_got_offsets != NULL |
| 7815 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 7816 | { |
| 7817 | struct plt_entry **local_plt; |
| 7818 | |
| 7819 | local_plt = (struct plt_entry **) (local_got_offsets |
| 7820 | + symtab_hdr->sh_info); |
| 7821 | ifunc = local_plt + r_symndx; |
| 7822 | } |
| 7823 | |
| 7824 | ent = NULL; |
| 7825 | if (ifunc != NULL |
| 7826 | && (!info->shared |
| 7827 | || is_branch_reloc (r_type))) |
| 7828 | { |
| 7829 | addend = 0; |
| 7830 | if (r_type == R_PPC_PLTREL24 && info->shared) |
| 7831 | addend = rel->r_addend; |
| 7832 | ent = find_plt_ent (ifunc, got2, addend); |
| 7833 | } |
| 7834 | if (ent != NULL) |
| 7835 | { |
| 7836 | if (h == NULL && (ent->plt.offset & 1) == 0) |
| 7837 | { |
| 7838 | Elf_Internal_Rela rela; |
| 7839 | bfd_byte *loc; |
| 7840 | |
| 7841 | rela.r_offset = (htab->iplt->output_section->vma |
| 7842 | + htab->iplt->output_offset |
| 7843 | + ent->plt.offset); |
| 7844 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 7845 | rela.r_addend = relocation; |
| 7846 | loc = htab->reliplt->contents; |
| 7847 | loc += (htab->reliplt->reloc_count++ |
| 7848 | * sizeof (Elf32_External_Rela)); |
| 7849 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 7850 | |
| 7851 | ent->plt.offset |= 1; |
| 7852 | } |
| 7853 | if (h == NULL && (ent->glink_offset & 1) == 0) |
| 7854 | { |
| 7855 | unsigned char *p = ((unsigned char *) htab->glink->contents |
| 7856 | + ent->glink_offset); |
| 7857 | write_glink_stub (ent, htab->iplt, p, info); |
| 7858 | ent->glink_offset |= 1; |
| 7859 | } |
| 7860 | |
| 7861 | unresolved_reloc = FALSE; |
| 7862 | if (htab->plt_type == PLT_NEW |
| 7863 | || !htab->elf.dynamic_sections_created |
| 7864 | || h == NULL) |
| 7865 | relocation = (htab->glink->output_section->vma |
| 7866 | + htab->glink->output_offset |
| 7867 | + (ent->glink_offset & ~1)); |
| 7868 | else |
| 7869 | relocation = (htab->plt->output_section->vma |
| 7870 | + htab->plt->output_offset |
| 7871 | + ent->plt.offset); |
| 7872 | } |
| 7873 | } |
| 7874 | |
| 7875 | addend = rel->r_addend; |
| 7876 | tls_type = 0; |
| 7877 | howto = NULL; |
| 7878 | if (r_type < R_PPC_max) |
| 7879 | howto = ppc_elf_howto_table[r_type]; |
| 7880 | switch (r_type) |
| 7881 | { |
| 7882 | default: |
| 7883 | info->callbacks->einfo |
| 7884 | (_("%P: %B: unknown relocation type %d for symbol %s\n"), |
| 7885 | input_bfd, (int) r_type, sym_name); |
| 7886 | |
| 7887 | bfd_set_error (bfd_error_bad_value); |
| 7888 | ret = FALSE; |
| 7889 | continue; |
| 7890 | |
| 7891 | case R_PPC_NONE: |
| 7892 | case R_PPC_TLS: |
| 7893 | case R_PPC_TLSGD: |
| 7894 | case R_PPC_TLSLD: |
| 7895 | case R_PPC_EMB_MRKREF: |
| 7896 | case R_PPC_GNU_VTINHERIT: |
| 7897 | case R_PPC_GNU_VTENTRY: |
| 7898 | continue; |
| 7899 | |
| 7900 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 7901 | address in the GOT as relocation value instead of the |
| 7902 | symbol's value itself. Also, create a GOT entry for the |
| 7903 | symbol and put the symbol value there. */ |
| 7904 | case R_PPC_GOT_TLSGD16: |
| 7905 | case R_PPC_GOT_TLSGD16_LO: |
| 7906 | case R_PPC_GOT_TLSGD16_HI: |
| 7907 | case R_PPC_GOT_TLSGD16_HA: |
| 7908 | tls_type = TLS_TLS | TLS_GD; |
| 7909 | goto dogot; |
| 7910 | |
| 7911 | case R_PPC_GOT_TLSLD16: |
| 7912 | case R_PPC_GOT_TLSLD16_LO: |
| 7913 | case R_PPC_GOT_TLSLD16_HI: |
| 7914 | case R_PPC_GOT_TLSLD16_HA: |
| 7915 | tls_type = TLS_TLS | TLS_LD; |
| 7916 | goto dogot; |
| 7917 | |
| 7918 | case R_PPC_GOT_TPREL16: |
| 7919 | case R_PPC_GOT_TPREL16_LO: |
| 7920 | case R_PPC_GOT_TPREL16_HI: |
| 7921 | case R_PPC_GOT_TPREL16_HA: |
| 7922 | tls_type = TLS_TLS | TLS_TPREL; |
| 7923 | goto dogot; |
| 7924 | |
| 7925 | case R_PPC_GOT_DTPREL16: |
| 7926 | case R_PPC_GOT_DTPREL16_LO: |
| 7927 | case R_PPC_GOT_DTPREL16_HI: |
| 7928 | case R_PPC_GOT_DTPREL16_HA: |
| 7929 | tls_type = TLS_TLS | TLS_DTPREL; |
| 7930 | goto dogot; |
| 7931 | |
| 7932 | case R_PPC_GOT16: |
| 7933 | case R_PPC_GOT16_LO: |
| 7934 | case R_PPC_GOT16_HI: |
| 7935 | case R_PPC_GOT16_HA: |
| 7936 | tls_mask = 0; |
| 7937 | dogot: |
| 7938 | { |
| 7939 | /* Relocation is to the entry for this symbol in the global |
| 7940 | offset table. */ |
| 7941 | bfd_vma off; |
| 7942 | bfd_vma *offp; |
| 7943 | unsigned long indx; |
| 7944 | |
| 7945 | if (htab->got == NULL) |
| 7946 | abort (); |
| 7947 | |
| 7948 | indx = 0; |
| 7949 | if (tls_type == (TLS_TLS | TLS_LD) |
| 7950 | && (h == NULL |
| 7951 | || !h->def_dynamic)) |
| 7952 | offp = &htab->tlsld_got.offset; |
| 7953 | else if (h != NULL) |
| 7954 | { |
| 7955 | bfd_boolean dyn; |
| 7956 | dyn = htab->elf.dynamic_sections_created; |
| 7957 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 7958 | || (info->shared |
| 7959 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
| 7960 | /* This is actually a static link, or it is a |
| 7961 | -Bsymbolic link and the symbol is defined |
| 7962 | locally, or the symbol was forced to be local |
| 7963 | because of a version file. */ |
| 7964 | ; |
| 7965 | else |
| 7966 | { |
| 7967 | BFD_ASSERT (h->dynindx != -1); |
| 7968 | indx = h->dynindx; |
| 7969 | unresolved_reloc = FALSE; |
| 7970 | } |
| 7971 | offp = &h->got.offset; |
| 7972 | } |
| 7973 | else |
| 7974 | { |
| 7975 | if (local_got_offsets == NULL) |
| 7976 | abort (); |
| 7977 | offp = &local_got_offsets[r_symndx]; |
| 7978 | } |
| 7979 | |
| 7980 | /* The offset must always be a multiple of 4. We use the |
| 7981 | least significant bit to record whether we have already |
| 7982 | processed this entry. */ |
| 7983 | off = *offp; |
| 7984 | if ((off & 1) != 0) |
| 7985 | off &= ~1; |
| 7986 | else |
| 7987 | { |
| 7988 | unsigned int tls_m = (tls_mask |
| 7989 | & (TLS_LD | TLS_GD | TLS_DTPREL |
| 7990 | | TLS_TPREL | TLS_TPRELGD)); |
| 7991 | |
| 7992 | if (offp == &htab->tlsld_got.offset) |
| 7993 | tls_m = TLS_LD; |
| 7994 | else if (h == NULL |
| 7995 | || !h->def_dynamic) |
| 7996 | tls_m &= ~TLS_LD; |
| 7997 | |
| 7998 | /* We might have multiple got entries for this sym. |
| 7999 | Initialize them all. */ |
| 8000 | do |
| 8001 | { |
| 8002 | int tls_ty = 0; |
| 8003 | |
| 8004 | if ((tls_m & TLS_LD) != 0) |
| 8005 | { |
| 8006 | tls_ty = TLS_TLS | TLS_LD; |
| 8007 | tls_m &= ~TLS_LD; |
| 8008 | } |
| 8009 | else if ((tls_m & TLS_GD) != 0) |
| 8010 | { |
| 8011 | tls_ty = TLS_TLS | TLS_GD; |
| 8012 | tls_m &= ~TLS_GD; |
| 8013 | } |
| 8014 | else if ((tls_m & TLS_DTPREL) != 0) |
| 8015 | { |
| 8016 | tls_ty = TLS_TLS | TLS_DTPREL; |
| 8017 | tls_m &= ~TLS_DTPREL; |
| 8018 | } |
| 8019 | else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 8020 | { |
| 8021 | tls_ty = TLS_TLS | TLS_TPREL; |
| 8022 | tls_m = 0; |
| 8023 | } |
| 8024 | |
| 8025 | /* Generate relocs for the dynamic linker. */ |
| 8026 | if ((info->shared || indx != 0) |
| 8027 | && (offp == &htab->tlsld_got.offset |
| 8028 | || h == NULL |
| 8029 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 8030 | || h->root.type != bfd_link_hash_undefweak)) |
| 8031 | { |
| 8032 | asection *rsec = htab->relgot; |
| 8033 | bfd_byte * loc; |
| 8034 | |
| 8035 | if (ifunc != NULL) |
| 8036 | rsec = htab->reliplt; |
| 8037 | outrel.r_offset = (htab->got->output_section->vma |
| 8038 | + htab->got->output_offset |
| 8039 | + off); |
| 8040 | outrel.r_addend = 0; |
| 8041 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 8042 | { |
| 8043 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); |
| 8044 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 8045 | { |
| 8046 | loc = rsec->contents; |
| 8047 | loc += (rsec->reloc_count++ |
| 8048 | * sizeof (Elf32_External_Rela)); |
| 8049 | bfd_elf32_swap_reloca_out (output_bfd, |
| 8050 | &outrel, loc); |
| 8051 | outrel.r_offset += 4; |
| 8052 | outrel.r_info |
| 8053 | = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 8054 | } |
| 8055 | } |
| 8056 | else if (tls_ty == (TLS_TLS | TLS_DTPREL)) |
| 8057 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 8058 | else if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 8059 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); |
| 8060 | else if (indx != 0) |
| 8061 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); |
| 8062 | else if (ifunc != NULL) |
| 8063 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 8064 | else |
| 8065 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 8066 | if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) |
| 8067 | { |
| 8068 | outrel.r_addend += relocation; |
| 8069 | if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| 8070 | outrel.r_addend -= htab->elf.tls_sec->vma; |
| 8071 | } |
| 8072 | loc = rsec->contents; |
| 8073 | loc += (rsec->reloc_count++ |
| 8074 | * sizeof (Elf32_External_Rela)); |
| 8075 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 8076 | } |
| 8077 | |
| 8078 | /* Init the .got section contents if we're not |
| 8079 | emitting a reloc. */ |
| 8080 | else |
| 8081 | { |
| 8082 | bfd_vma value = relocation; |
| 8083 | |
| 8084 | if (tls_ty == (TLS_TLS | TLS_LD)) |
| 8085 | value = 1; |
| 8086 | else if (tls_ty != 0) |
| 8087 | { |
| 8088 | value -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 8089 | if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 8090 | value += DTP_OFFSET - TP_OFFSET; |
| 8091 | |
| 8092 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 8093 | { |
| 8094 | bfd_put_32 (output_bfd, value, |
| 8095 | htab->got->contents + off + 4); |
| 8096 | value = 1; |
| 8097 | } |
| 8098 | } |
| 8099 | bfd_put_32 (output_bfd, value, |
| 8100 | htab->got->contents + off); |
| 8101 | } |
| 8102 | |
| 8103 | off += 4; |
| 8104 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 8105 | off += 4; |
| 8106 | } |
| 8107 | while (tls_m != 0); |
| 8108 | |
| 8109 | off = *offp; |
| 8110 | *offp = off | 1; |
| 8111 | } |
| 8112 | |
| 8113 | if (off >= (bfd_vma) -2) |
| 8114 | abort (); |
| 8115 | |
| 8116 | if ((tls_type & TLS_TLS) != 0) |
| 8117 | { |
| 8118 | if (tls_type != (TLS_TLS | TLS_LD)) |
| 8119 | { |
| 8120 | if ((tls_mask & TLS_LD) != 0 |
| 8121 | && !(h == NULL |
| 8122 | || !h->def_dynamic)) |
| 8123 | off += 8; |
| 8124 | if (tls_type != (TLS_TLS | TLS_GD)) |
| 8125 | { |
| 8126 | if ((tls_mask & TLS_GD) != 0) |
| 8127 | off += 8; |
| 8128 | if (tls_type != (TLS_TLS | TLS_DTPREL)) |
| 8129 | { |
| 8130 | if ((tls_mask & TLS_DTPREL) != 0) |
| 8131 | off += 4; |
| 8132 | } |
| 8133 | } |
| 8134 | } |
| 8135 | } |
| 8136 | |
| 8137 | relocation = (htab->got->output_section->vma |
| 8138 | + htab->got->output_offset |
| 8139 | + off |
| 8140 | - SYM_VAL (htab->elf.hgot)); |
| 8141 | |
| 8142 | /* Addends on got relocations don't make much sense. |
| 8143 | x+off@got is actually x@got+off, and since the got is |
| 8144 | generated by a hash table traversal, the value in the |
| 8145 | got at entry m+n bears little relation to the entry m. */ |
| 8146 | if (addend != 0) |
| 8147 | info->callbacks->einfo |
| 8148 | (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), |
| 8149 | input_bfd, input_section, rel->r_offset, |
| 8150 | howto->name, |
| 8151 | sym_name); |
| 8152 | } |
| 8153 | break; |
| 8154 | |
| 8155 | /* Relocations that need no special processing. */ |
| 8156 | case R_PPC_LOCAL24PC: |
| 8157 | /* It makes no sense to point a local relocation |
| 8158 | at a symbol not in this object. */ |
| 8159 | if (unresolved_reloc) |
| 8160 | { |
| 8161 | if (! (*info->callbacks->undefined_symbol) (info, |
| 8162 | h->root.root.string, |
| 8163 | input_bfd, |
| 8164 | input_section, |
| 8165 | rel->r_offset, |
| 8166 | TRUE)) |
| 8167 | return FALSE; |
| 8168 | continue; |
| 8169 | } |
| 8170 | break; |
| 8171 | |
| 8172 | case R_PPC_DTPREL16: |
| 8173 | case R_PPC_DTPREL16_LO: |
| 8174 | case R_PPC_DTPREL16_HI: |
| 8175 | case R_PPC_DTPREL16_HA: |
| 8176 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 8177 | break; |
| 8178 | |
| 8179 | /* Relocations that may need to be propagated if this is a shared |
| 8180 | object. */ |
| 8181 | case R_PPC_TPREL16: |
| 8182 | case R_PPC_TPREL16_LO: |
| 8183 | case R_PPC_TPREL16_HI: |
| 8184 | case R_PPC_TPREL16_HA: |
| 8185 | if (h != NULL |
| 8186 | && h->root.type == bfd_link_hash_undefweak |
| 8187 | && h->dynindx == -1) |
| 8188 | { |
| 8189 | /* Make this relocation against an undefined weak symbol |
| 8190 | resolve to zero. This is really just a tweak, since |
| 8191 | code using weak externs ought to check that they are |
| 8192 | defined before using them. */ |
| 8193 | bfd_byte *p = contents + rel->r_offset - d_offset; |
| 8194 | unsigned int insn = bfd_get_32 (output_bfd, p); |
| 8195 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); |
| 8196 | if (insn != 0) |
| 8197 | bfd_put_32 (output_bfd, insn, p); |
| 8198 | break; |
| 8199 | } |
| 8200 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 8201 | /* The TPREL16 relocs shouldn't really be used in shared |
| 8202 | libs as they will result in DT_TEXTREL being set, but |
| 8203 | support them anyway. */ |
| 8204 | goto dodyn; |
| 8205 | |
| 8206 | case R_PPC_TPREL32: |
| 8207 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 8208 | goto dodyn; |
| 8209 | |
| 8210 | case R_PPC_DTPREL32: |
| 8211 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 8212 | goto dodyn; |
| 8213 | |
| 8214 | case R_PPC_DTPMOD32: |
| 8215 | relocation = 1; |
| 8216 | addend = 0; |
| 8217 | goto dodyn; |
| 8218 | |
| 8219 | case R_PPC_REL16: |
| 8220 | case R_PPC_REL16_LO: |
| 8221 | case R_PPC_REL16_HI: |
| 8222 | case R_PPC_REL16_HA: |
| 8223 | break; |
| 8224 | |
| 8225 | case R_PPC_REL32: |
| 8226 | if (h == NULL || h == htab->elf.hgot) |
| 8227 | break; |
| 8228 | /* fall through */ |
| 8229 | |
| 8230 | case R_PPC_ADDR32: |
| 8231 | case R_PPC_ADDR16: |
| 8232 | case R_PPC_ADDR16_LO: |
| 8233 | case R_PPC_ADDR16_HI: |
| 8234 | case R_PPC_ADDR16_HA: |
| 8235 | case R_PPC_UADDR32: |
| 8236 | case R_PPC_UADDR16: |
| 8237 | goto dodyn; |
| 8238 | |
| 8239 | case R_PPC_VLE_REL8: |
| 8240 | case R_PPC_VLE_REL15: |
| 8241 | case R_PPC_VLE_REL24: |
| 8242 | case R_PPC_REL24: |
| 8243 | case R_PPC_REL14: |
| 8244 | case R_PPC_REL14_BRTAKEN: |
| 8245 | case R_PPC_REL14_BRNTAKEN: |
| 8246 | /* If these relocations are not to a named symbol, they can be |
| 8247 | handled right here, no need to bother the dynamic linker. */ |
| 8248 | if (SYMBOL_CALLS_LOCAL (info, h) |
| 8249 | || h == htab->elf.hgot) |
| 8250 | break; |
| 8251 | /* fall through */ |
| 8252 | |
| 8253 | case R_PPC_ADDR24: |
| 8254 | case R_PPC_ADDR14: |
| 8255 | case R_PPC_ADDR14_BRTAKEN: |
| 8256 | case R_PPC_ADDR14_BRNTAKEN: |
| 8257 | if (h != NULL && !info->shared) |
| 8258 | break; |
| 8259 | /* fall through */ |
| 8260 | |
| 8261 | dodyn: |
| 8262 | if ((input_section->flags & SEC_ALLOC) == 0 |
| 8263 | || is_vxworks_tls) |
| 8264 | break; |
| 8265 | |
| 8266 | if ((info->shared |
| 8267 | && !(h != NULL |
| 8268 | && ((h->root.type == bfd_link_hash_undefined |
| 8269 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN |
| 8270 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) |
| 8271 | || (h->root.type == bfd_link_hash_undefweak |
| 8272 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) |
| 8273 | && (must_be_dyn_reloc (info, r_type) |
| 8274 | || !SYMBOL_CALLS_LOCAL (info, h))) |
| 8275 | || (ELIMINATE_COPY_RELOCS |
| 8276 | && !info->shared |
| 8277 | && h != NULL |
| 8278 | && h->dynindx != -1 |
| 8279 | && !h->non_got_ref |
| 8280 | && !h->def_regular)) |
| 8281 | { |
| 8282 | int skip; |
| 8283 | bfd_byte *loc; |
| 8284 | asection *sreloc; |
| 8285 | #ifdef DEBUG |
| 8286 | fprintf (stderr, "ppc_elf_relocate_section needs to " |
| 8287 | "create relocation for %s\n", |
| 8288 | (h && h->root.root.string |
| 8289 | ? h->root.root.string : "<unknown>")); |
| 8290 | #endif |
| 8291 | |
| 8292 | /* When generating a shared object, these relocations |
| 8293 | are copied into the output file to be resolved at run |
| 8294 | time. */ |
| 8295 | sreloc = elf_section_data (input_section)->sreloc; |
| 8296 | if (ifunc) |
| 8297 | sreloc = htab->reliplt; |
| 8298 | if (sreloc == NULL) |
| 8299 | return FALSE; |
| 8300 | |
| 8301 | skip = 0; |
| 8302 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, |
| 8303 | input_section, |
| 8304 | rel->r_offset); |
| 8305 | if (outrel.r_offset == (bfd_vma) -1 |
| 8306 | || outrel.r_offset == (bfd_vma) -2) |
| 8307 | skip = (int) outrel.r_offset; |
| 8308 | outrel.r_offset += (input_section->output_section->vma |
| 8309 | + input_section->output_offset); |
| 8310 | |
| 8311 | if (skip) |
| 8312 | memset (&outrel, 0, sizeof outrel); |
| 8313 | else if ((h != NULL |
| 8314 | && (h->root.type == bfd_link_hash_undefined |
| 8315 | || h->root.type == bfd_link_hash_undefweak)) |
| 8316 | || !SYMBOL_REFERENCES_LOCAL (info, h)) |
| 8317 | { |
| 8318 | BFD_ASSERT (h->dynindx != -1); |
| 8319 | unresolved_reloc = FALSE; |
| 8320 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 8321 | outrel.r_addend = rel->r_addend; |
| 8322 | } |
| 8323 | else |
| 8324 | { |
| 8325 | outrel.r_addend = relocation + rel->r_addend; |
| 8326 | |
| 8327 | if (r_type != R_PPC_ADDR32) |
| 8328 | { |
| 8329 | long indx = 0; |
| 8330 | |
| 8331 | if (ifunc != NULL) |
| 8332 | { |
| 8333 | /* If we get here when building a static |
| 8334 | executable, then the libc startup function |
| 8335 | responsible for applying indirect function |
| 8336 | relocations is going to complain about |
| 8337 | the reloc type. |
| 8338 | If we get here when building a dynamic |
| 8339 | executable, it will be because we have |
| 8340 | a text relocation. The dynamic loader |
| 8341 | will set the text segment writable and |
| 8342 | non-executable to apply text relocations. |
| 8343 | So we'll segfault when trying to run the |
| 8344 | indirection function to resolve the reloc. */ |
| 8345 | info->callbacks->einfo |
| 8346 | (_("%P: %H: relocation %s for indirect " |
| 8347 | "function %s unsupported\n"), |
| 8348 | input_bfd, input_section, rel->r_offset, |
| 8349 | howto->name, |
| 8350 | sym_name); |
| 8351 | ret = FALSE; |
| 8352 | } |
| 8353 | else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
| 8354 | ; |
| 8355 | else if (sec == NULL || sec->owner == NULL) |
| 8356 | { |
| 8357 | bfd_set_error (bfd_error_bad_value); |
| 8358 | ret = FALSE; |
| 8359 | } |
| 8360 | else |
| 8361 | { |
| 8362 | asection *osec; |
| 8363 | |
| 8364 | /* We are turning this relocation into one |
| 8365 | against a section symbol. It would be |
| 8366 | proper to subtract the symbol's value, |
| 8367 | osec->vma, from the emitted reloc addend, |
| 8368 | but ld.so expects buggy relocs. |
| 8369 | FIXME: Why not always use a zero index? */ |
| 8370 | osec = sec->output_section; |
| 8371 | indx = elf_section_data (osec)->dynindx; |
| 8372 | if (indx == 0) |
| 8373 | { |
| 8374 | osec = htab->elf.text_index_section; |
| 8375 | indx = elf_section_data (osec)->dynindx; |
| 8376 | } |
| 8377 | BFD_ASSERT (indx != 0); |
| 8378 | #ifdef DEBUG |
| 8379 | if (indx == 0) |
| 8380 | printf ("indx=%ld section=%s flags=%08x name=%s\n", |
| 8381 | indx, osec->name, osec->flags, |
| 8382 | h->root.root.string); |
| 8383 | #endif |
| 8384 | } |
| 8385 | |
| 8386 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 8387 | } |
| 8388 | else if (ifunc != NULL) |
| 8389 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 8390 | else |
| 8391 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 8392 | } |
| 8393 | |
| 8394 | loc = sreloc->contents; |
| 8395 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 8396 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 8397 | |
| 8398 | if (skip == -1) |
| 8399 | continue; |
| 8400 | |
| 8401 | /* This reloc will be computed at runtime. We clear the memory |
| 8402 | so that it contains predictable value. */ |
| 8403 | if (! skip |
| 8404 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 8405 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) |
| 8406 | { |
| 8407 | relocation = howto->pc_relative ? outrel.r_offset : 0; |
| 8408 | addend = 0; |
| 8409 | break; |
| 8410 | } |
| 8411 | } |
| 8412 | break; |
| 8413 | |
| 8414 | case R_PPC_RELAX_PLT: |
| 8415 | case R_PPC_RELAX_PLTREL24: |
| 8416 | if (h != NULL) |
| 8417 | { |
| 8418 | struct plt_entry *ent; |
| 8419 | bfd_vma got2_addend = 0; |
| 8420 | |
| 8421 | if (r_type == R_PPC_RELAX_PLTREL24) |
| 8422 | { |
| 8423 | if (info->shared) |
| 8424 | got2_addend = addend; |
| 8425 | addend = 0; |
| 8426 | } |
| 8427 | ent = find_plt_ent (&h->plt.plist, got2, got2_addend); |
| 8428 | if (htab->plt_type == PLT_NEW) |
| 8429 | relocation = (htab->glink->output_section->vma |
| 8430 | + htab->glink->output_offset |
| 8431 | + ent->glink_offset); |
| 8432 | else |
| 8433 | relocation = (htab->plt->output_section->vma |
| 8434 | + htab->plt->output_offset |
| 8435 | + ent->plt.offset); |
| 8436 | } |
| 8437 | /* Fall thru */ |
| 8438 | |
| 8439 | case R_PPC_RELAX: |
| 8440 | if (info->shared) |
| 8441 | relocation -= (input_section->output_section->vma |
| 8442 | + input_section->output_offset |
| 8443 | + rel->r_offset - 4); |
| 8444 | |
| 8445 | { |
| 8446 | unsigned long t0; |
| 8447 | unsigned long t1; |
| 8448 | |
| 8449 | t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 8450 | t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); |
| 8451 | |
| 8452 | /* We're clearing the bits for R_PPC_ADDR16_HA |
| 8453 | and R_PPC_ADDR16_LO here. */ |
| 8454 | t0 &= ~0xffff; |
| 8455 | t1 &= ~0xffff; |
| 8456 | |
| 8457 | /* t0 is HA, t1 is LO */ |
| 8458 | relocation += addend; |
| 8459 | t0 |= ((relocation + 0x8000) >> 16) & 0xffff; |
| 8460 | t1 |= relocation & 0xffff; |
| 8461 | |
| 8462 | bfd_put_32 (output_bfd, t0, contents + rel->r_offset); |
| 8463 | bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); |
| 8464 | |
| 8465 | /* Rewrite the reloc and convert one of the trailing nop |
| 8466 | relocs to describe this relocation. */ |
| 8467 | BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); |
| 8468 | /* The relocs are at the bottom 2 bytes */ |
| 8469 | rel[0].r_offset += 2; |
| 8470 | memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); |
| 8471 | rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); |
| 8472 | rel[1].r_offset += 4; |
| 8473 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); |
| 8474 | rel++; |
| 8475 | } |
| 8476 | continue; |
| 8477 | |
| 8478 | /* Indirect .sdata relocation. */ |
| 8479 | case R_PPC_EMB_SDAI16: |
| 8480 | BFD_ASSERT (htab->sdata[0].section != NULL); |
| 8481 | if (!is_static_defined (htab->sdata[0].sym)) |
| 8482 | { |
| 8483 | unresolved_reloc = TRUE; |
| 8484 | break; |
| 8485 | } |
| 8486 | relocation |
| 8487 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], |
| 8488 | h, relocation, rel); |
| 8489 | addend = 0; |
| 8490 | break; |
| 8491 | |
| 8492 | /* Indirect .sdata2 relocation. */ |
| 8493 | case R_PPC_EMB_SDA2I16: |
| 8494 | BFD_ASSERT (htab->sdata[1].section != NULL); |
| 8495 | if (!is_static_defined (htab->sdata[1].sym)) |
| 8496 | { |
| 8497 | unresolved_reloc = TRUE; |
| 8498 | break; |
| 8499 | } |
| 8500 | relocation |
| 8501 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], |
| 8502 | h, relocation, rel); |
| 8503 | addend = 0; |
| 8504 | break; |
| 8505 | |
| 8506 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 8507 | section, not the actual VMA. This is appropriate when generating |
| 8508 | an embedded ELF object, for which the .got section acts like the |
| 8509 | AIX .toc section. */ |
| 8510 | case R_PPC_TOC16: /* phony GOT16 relocations */ |
| 8511 | if (sec == NULL || sec->output_section == NULL) |
| 8512 | { |
| 8513 | unresolved_reloc = TRUE; |
| 8514 | break; |
| 8515 | } |
| 8516 | BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), |
| 8517 | ".got") == 0 |
| 8518 | || strcmp (bfd_get_section_name (sec->owner, sec), |
| 8519 | ".cgot") == 0); |
| 8520 | |
| 8521 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 8522 | break; |
| 8523 | |
| 8524 | case R_PPC_PLTREL24: |
| 8525 | if (h != NULL && ifunc == NULL) |
| 8526 | { |
| 8527 | struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, |
| 8528 | info->shared ? addend : 0); |
| 8529 | if (ent == NULL |
| 8530 | || htab->plt == NULL) |
| 8531 | { |
| 8532 | /* We didn't make a PLT entry for this symbol. This |
| 8533 | happens when statically linking PIC code, or when |
| 8534 | using -Bsymbolic. */ |
| 8535 | } |
| 8536 | else |
| 8537 | { |
| 8538 | /* Relocation is to the entry for this symbol in the |
| 8539 | procedure linkage table. */ |
| 8540 | unresolved_reloc = FALSE; |
| 8541 | if (htab->plt_type == PLT_NEW) |
| 8542 | relocation = (htab->glink->output_section->vma |
| 8543 | + htab->glink->output_offset |
| 8544 | + ent->glink_offset); |
| 8545 | else |
| 8546 | relocation = (htab->plt->output_section->vma |
| 8547 | + htab->plt->output_offset |
| 8548 | + ent->plt.offset); |
| 8549 | } |
| 8550 | } |
| 8551 | |
| 8552 | /* R_PPC_PLTREL24 is rather special. If non-zero, the |
| 8553 | addend specifies the GOT pointer offset within .got2. |
| 8554 | Don't apply it to the relocation field. */ |
| 8555 | addend = 0; |
| 8556 | break; |
| 8557 | |
| 8558 | /* Relocate against _SDA_BASE_. */ |
| 8559 | case R_PPC_SDAREL16: |
| 8560 | { |
| 8561 | const char *name; |
| 8562 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
| 8563 | |
| 8564 | if (sec == NULL |
| 8565 | || sec->output_section == NULL |
| 8566 | || !is_static_defined (sda)) |
| 8567 | { |
| 8568 | unresolved_reloc = TRUE; |
| 8569 | break; |
| 8570 | } |
| 8571 | addend -= SYM_VAL (sda); |
| 8572 | |
| 8573 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8574 | if (! ((CONST_STRNEQ (name, ".sdata") |
| 8575 | && (name[6] == 0 || name[6] == '.')) |
| 8576 | || (CONST_STRNEQ (name, ".sbss") |
| 8577 | && (name[5] == 0 || name[5] == '.')))) |
| 8578 | { |
| 8579 | info->callbacks->einfo |
| 8580 | (_("%P: %B: the target (%s) of a %s relocation is " |
| 8581 | "in the wrong output section (%s)\n"), |
| 8582 | input_bfd, |
| 8583 | sym_name, |
| 8584 | howto->name, |
| 8585 | name); |
| 8586 | } |
| 8587 | } |
| 8588 | break; |
| 8589 | |
| 8590 | /* Relocate against _SDA2_BASE_. */ |
| 8591 | case R_PPC_EMB_SDA2REL: |
| 8592 | { |
| 8593 | const char *name; |
| 8594 | struct elf_link_hash_entry *sda = htab->sdata[1].sym; |
| 8595 | |
| 8596 | if (sec == NULL |
| 8597 | || sec->output_section == NULL |
| 8598 | || !is_static_defined (sda)) |
| 8599 | { |
| 8600 | unresolved_reloc = TRUE; |
| 8601 | break; |
| 8602 | } |
| 8603 | addend -= SYM_VAL (sda); |
| 8604 | |
| 8605 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8606 | if (! (CONST_STRNEQ (name, ".sdata2") |
| 8607 | || CONST_STRNEQ (name, ".sbss2"))) |
| 8608 | { |
| 8609 | info->callbacks->einfo |
| 8610 | (_("%P: %B: the target (%s) of a %s relocation is " |
| 8611 | "in the wrong output section (%s)\n"), |
| 8612 | input_bfd, |
| 8613 | sym_name, |
| 8614 | howto->name, |
| 8615 | name); |
| 8616 | } |
| 8617 | } |
| 8618 | break; |
| 8619 | |
| 8620 | case R_PPC_VLE_LO16A: |
| 8621 | relocation = (relocation + addend) & 0xffff; |
| 8622 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8623 | relocation, split16a_type); |
| 8624 | continue; |
| 8625 | |
| 8626 | case R_PPC_VLE_LO16D: |
| 8627 | relocation = (relocation + addend) & 0xffff; |
| 8628 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8629 | relocation, split16d_type); |
| 8630 | continue; |
| 8631 | |
| 8632 | case R_PPC_VLE_HI16A: |
| 8633 | relocation = ((relocation + addend) >> 16) & 0xffff; |
| 8634 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8635 | relocation, split16a_type); |
| 8636 | continue; |
| 8637 | |
| 8638 | case R_PPC_VLE_HI16D: |
| 8639 | relocation = ((relocation + addend) >> 16) & 0xffff; |
| 8640 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8641 | relocation, split16d_type); |
| 8642 | continue; |
| 8643 | |
| 8644 | case R_PPC_VLE_HA16A: |
| 8645 | { |
| 8646 | bfd_vma value = relocation + addend; |
| 8647 | value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); |
| 8648 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8649 | value, split16a_type); |
| 8650 | } |
| 8651 | continue; |
| 8652 | |
| 8653 | case R_PPC_VLE_HA16D: |
| 8654 | { |
| 8655 | bfd_vma value = relocation + addend; |
| 8656 | value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); |
| 8657 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8658 | value, split16d_type); |
| 8659 | } |
| 8660 | continue; |
| 8661 | |
| 8662 | /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ |
| 8663 | case R_PPC_EMB_SDA21: |
| 8664 | case R_PPC_VLE_SDA21: |
| 8665 | case R_PPC_EMB_RELSDA: |
| 8666 | case R_PPC_VLE_SDA21_LO: |
| 8667 | { |
| 8668 | const char *name; |
| 8669 | int reg; |
| 8670 | struct elf_link_hash_entry *sda = NULL; |
| 8671 | |
| 8672 | if (sec == NULL || sec->output_section == NULL) |
| 8673 | { |
| 8674 | unresolved_reloc = TRUE; |
| 8675 | break; |
| 8676 | } |
| 8677 | |
| 8678 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8679 | if (((CONST_STRNEQ (name, ".sdata") |
| 8680 | && (name[6] == 0 || name[6] == '.')) |
| 8681 | || (CONST_STRNEQ (name, ".sbss") |
| 8682 | && (name[5] == 0 || name[5] == '.')))) |
| 8683 | { |
| 8684 | reg = 13; |
| 8685 | sda = htab->sdata[0].sym; |
| 8686 | } |
| 8687 | else if (CONST_STRNEQ (name, ".sdata2") |
| 8688 | || CONST_STRNEQ (name, ".sbss2")) |
| 8689 | { |
| 8690 | reg = 2; |
| 8691 | sda = htab->sdata[1].sym; |
| 8692 | } |
| 8693 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 |
| 8694 | || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 8695 | { |
| 8696 | reg = 0; |
| 8697 | } |
| 8698 | else |
| 8699 | { |
| 8700 | info->callbacks->einfo |
| 8701 | (_("%P: %B: the target (%s) of a %s relocation is " |
| 8702 | "in the wrong output section (%s)\n"), |
| 8703 | input_bfd, |
| 8704 | sym_name, |
| 8705 | howto->name, |
| 8706 | name); |
| 8707 | |
| 8708 | bfd_set_error (bfd_error_bad_value); |
| 8709 | ret = FALSE; |
| 8710 | continue; |
| 8711 | } |
| 8712 | |
| 8713 | if (sda != NULL) |
| 8714 | { |
| 8715 | if (!is_static_defined (sda)) |
| 8716 | { |
| 8717 | unresolved_reloc = TRUE; |
| 8718 | break; |
| 8719 | } |
| 8720 | addend -= SYM_VAL (sda); |
| 8721 | } |
| 8722 | |
| 8723 | if (reg == 0 |
| 8724 | && (r_type == R_PPC_VLE_SDA21 |
| 8725 | || r_type == R_PPC_VLE_SDA21_LO)) |
| 8726 | { |
| 8727 | /* Use the split20 format. */ |
| 8728 | bfd_vma insn, bits12to15, bits21to31; |
| 8729 | bfd_vma value = (relocation + rel->r_offset) & 0xffff; |
| 8730 | /* Propagate sign bit, if necessary. */ |
| 8731 | insn = (value & 0x8000) ? 0x70107800 : 0x70000000; |
| 8732 | bits12to15 = value & 0x700; |
| 8733 | bits21to31 = value & 0x7ff; |
| 8734 | insn |= bits12to15; |
| 8735 | insn |= bits21to31; |
| 8736 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 8737 | continue; |
| 8738 | } |
| 8739 | else if (r_type == R_PPC_EMB_SDA21 |
| 8740 | || r_type == R_PPC_VLE_SDA21 |
| 8741 | || r_type == R_PPC_VLE_SDA21_LO) |
| 8742 | { |
| 8743 | bfd_vma insn; /* Fill in register field. */ |
| 8744 | |
| 8745 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 8746 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 8747 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 8748 | } |
| 8749 | } |
| 8750 | break; |
| 8751 | |
| 8752 | case R_PPC_VLE_SDAREL_LO16A: |
| 8753 | case R_PPC_VLE_SDAREL_LO16D: |
| 8754 | case R_PPC_VLE_SDAREL_HI16A: |
| 8755 | case R_PPC_VLE_SDAREL_HI16D: |
| 8756 | case R_PPC_VLE_SDAREL_HA16A: |
| 8757 | case R_PPC_VLE_SDAREL_HA16D: |
| 8758 | { |
| 8759 | bfd_vma value; |
| 8760 | const char *name; |
| 8761 | //int reg; |
| 8762 | struct elf_link_hash_entry *sda = NULL; |
| 8763 | |
| 8764 | if (sec == NULL || sec->output_section == NULL) |
| 8765 | { |
| 8766 | unresolved_reloc = TRUE; |
| 8767 | break; |
| 8768 | } |
| 8769 | |
| 8770 | name = bfd_get_section_name (output_bfd, sec->output_section); |
| 8771 | if (((CONST_STRNEQ (name, ".sdata") |
| 8772 | && (name[6] == 0 || name[6] == '.')) |
| 8773 | || (CONST_STRNEQ (name, ".sbss") |
| 8774 | && (name[5] == 0 || name[5] == '.')))) |
| 8775 | { |
| 8776 | //reg = 13; |
| 8777 | sda = htab->sdata[0].sym; |
| 8778 | } |
| 8779 | else if (CONST_STRNEQ (name, ".sdata2") |
| 8780 | || CONST_STRNEQ (name, ".sbss2")) |
| 8781 | { |
| 8782 | //reg = 2; |
| 8783 | sda = htab->sdata[1].sym; |
| 8784 | } |
| 8785 | else |
| 8786 | { |
| 8787 | (*_bfd_error_handler) |
| 8788 | (_("%B: the target (%s) of a %s relocation is " |
| 8789 | "in the wrong output section (%s)"), |
| 8790 | input_bfd, |
| 8791 | sym_name, |
| 8792 | howto->name, |
| 8793 | name); |
| 8794 | |
| 8795 | bfd_set_error (bfd_error_bad_value); |
| 8796 | ret = FALSE; |
| 8797 | continue; |
| 8798 | } |
| 8799 | |
| 8800 | if (sda != NULL) |
| 8801 | { |
| 8802 | if (!is_static_defined (sda)) |
| 8803 | { |
| 8804 | unresolved_reloc = TRUE; |
| 8805 | break; |
| 8806 | } |
| 8807 | } |
| 8808 | |
| 8809 | value = sda->root.u.def.section->output_section->vma |
| 8810 | + sda->root.u.def.section->output_offset; |
| 8811 | |
| 8812 | if (r_type == R_PPC_VLE_SDAREL_LO16A) |
| 8813 | { |
| 8814 | value = (value + addend) & 0xffff; |
| 8815 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8816 | value, split16a_type); |
| 8817 | } |
| 8818 | else if (r_type == R_PPC_VLE_SDAREL_LO16D) |
| 8819 | { |
| 8820 | value = (value + addend) & 0xffff; |
| 8821 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8822 | value, split16d_type); |
| 8823 | } |
| 8824 | else if (r_type == R_PPC_VLE_SDAREL_HI16A) |
| 8825 | { |
| 8826 | value = ((value + addend) >> 16) & 0xffff; |
| 8827 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8828 | value, split16a_type); |
| 8829 | } |
| 8830 | else if (r_type == R_PPC_VLE_SDAREL_HI16D) |
| 8831 | { |
| 8832 | value = ((value + addend) >> 16) & 0xffff; |
| 8833 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8834 | value, split16d_type); |
| 8835 | } |
| 8836 | else if (r_type == R_PPC_VLE_SDAREL_HA16A) |
| 8837 | { |
| 8838 | value += addend; |
| 8839 | value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); |
| 8840 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8841 | value, split16a_type); |
| 8842 | } |
| 8843 | else if (r_type == R_PPC_VLE_SDAREL_HA16D) |
| 8844 | { |
| 8845 | value += addend; |
| 8846 | value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); |
| 8847 | ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, |
| 8848 | value, split16d_type); |
| 8849 | } |
| 8850 | } |
| 8851 | continue; |
| 8852 | |
| 8853 | /* Relocate against the beginning of the section. */ |
| 8854 | case R_PPC_SECTOFF: |
| 8855 | case R_PPC_SECTOFF_LO: |
| 8856 | case R_PPC_SECTOFF_HI: |
| 8857 | case R_PPC_SECTOFF_HA: |
| 8858 | if (sec == NULL || sec->output_section == NULL) |
| 8859 | { |
| 8860 | unresolved_reloc = TRUE; |
| 8861 | break; |
| 8862 | } |
| 8863 | addend -= sec->output_section->vma; |
| 8864 | break; |
| 8865 | |
| 8866 | /* Negative relocations. */ |
| 8867 | case R_PPC_EMB_NADDR32: |
| 8868 | case R_PPC_EMB_NADDR16: |
| 8869 | case R_PPC_EMB_NADDR16_LO: |
| 8870 | case R_PPC_EMB_NADDR16_HI: |
| 8871 | case R_PPC_EMB_NADDR16_HA: |
| 8872 | addend -= 2 * relocation; |
| 8873 | break; |
| 8874 | |
| 8875 | case R_PPC_COPY: |
| 8876 | case R_PPC_GLOB_DAT: |
| 8877 | case R_PPC_JMP_SLOT: |
| 8878 | case R_PPC_RELATIVE: |
| 8879 | case R_PPC_IRELATIVE: |
| 8880 | case R_PPC_PLT32: |
| 8881 | case R_PPC_PLTREL32: |
| 8882 | case R_PPC_PLT16_LO: |
| 8883 | case R_PPC_PLT16_HI: |
| 8884 | case R_PPC_PLT16_HA: |
| 8885 | case R_PPC_ADDR30: |
| 8886 | case R_PPC_EMB_RELSEC16: |
| 8887 | case R_PPC_EMB_RELST_LO: |
| 8888 | case R_PPC_EMB_RELST_HI: |
| 8889 | case R_PPC_EMB_RELST_HA: |
| 8890 | case R_PPC_EMB_BIT_FLD: |
| 8891 | info->callbacks->einfo |
| 8892 | (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), |
| 8893 | input_bfd, |
| 8894 | howto->name, |
| 8895 | sym_name); |
| 8896 | |
| 8897 | bfd_set_error (bfd_error_invalid_operation); |
| 8898 | ret = FALSE; |
| 8899 | continue; |
| 8900 | } |
| 8901 | |
| 8902 | /* Do any further special processing. */ |
| 8903 | switch (r_type) |
| 8904 | { |
| 8905 | default: |
| 8906 | break; |
| 8907 | |
| 8908 | case R_PPC_ADDR16_HA: |
| 8909 | case R_PPC_REL16_HA: |
| 8910 | case R_PPC_SECTOFF_HA: |
| 8911 | case R_PPC_TPREL16_HA: |
| 8912 | case R_PPC_DTPREL16_HA: |
| 8913 | case R_PPC_EMB_NADDR16_HA: |
| 8914 | case R_PPC_EMB_RELST_HA: |
| 8915 | /* It's just possible that this symbol is a weak symbol |
| 8916 | that's not actually defined anywhere. In that case, |
| 8917 | 'sec' would be NULL, and we should leave the symbol |
| 8918 | alone (it will be set to zero elsewhere in the link). */ |
| 8919 | if (sec == NULL) |
| 8920 | break; |
| 8921 | /* Fall thru */ |
| 8922 | |
| 8923 | case R_PPC_PLT16_HA: |
| 8924 | case R_PPC_GOT16_HA: |
| 8925 | case R_PPC_GOT_TLSGD16_HA: |
| 8926 | case R_PPC_GOT_TLSLD16_HA: |
| 8927 | case R_PPC_GOT_TPREL16_HA: |
| 8928 | case R_PPC_GOT_DTPREL16_HA: |
| 8929 | /* Add 0x10000 if sign bit in 0:15 is set. |
| 8930 | Bits 0:15 are not used. */ |
| 8931 | addend += 0x8000; |
| 8932 | break; |
| 8933 | |
| 8934 | case R_PPC_ADDR16: |
| 8935 | case R_PPC_ADDR16_LO: |
| 8936 | case R_PPC_GOT16: |
| 8937 | case R_PPC_GOT16_LO: |
| 8938 | case R_PPC_SDAREL16: |
| 8939 | case R_PPC_SECTOFF: |
| 8940 | case R_PPC_SECTOFF_LO: |
| 8941 | case R_PPC_DTPREL16: |
| 8942 | case R_PPC_DTPREL16_LO: |
| 8943 | case R_PPC_TPREL16: |
| 8944 | case R_PPC_TPREL16_LO: |
| 8945 | case R_PPC_GOT_TLSGD16: |
| 8946 | case R_PPC_GOT_TLSGD16_LO: |
| 8947 | case R_PPC_GOT_TLSLD16: |
| 8948 | case R_PPC_GOT_TLSLD16_LO: |
| 8949 | case R_PPC_GOT_DTPREL16: |
| 8950 | case R_PPC_GOT_DTPREL16_LO: |
| 8951 | case R_PPC_GOT_TPREL16: |
| 8952 | case R_PPC_GOT_TPREL16_LO: |
| 8953 | { |
| 8954 | /* The 32-bit ABI lacks proper relocations to deal with |
| 8955 | certain 64-bit instructions. Prevent damage to bits |
| 8956 | that make up part of the insn opcode. */ |
| 8957 | unsigned int insn, mask, lobit; |
| 8958 | |
| 8959 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); |
| 8960 | mask = 0; |
| 8961 | if (is_insn_ds_form (insn)) |
| 8962 | mask = 3; |
| 8963 | else if (is_insn_dq_form (insn)) |
| 8964 | mask = 15; |
| 8965 | else |
| 8966 | break; |
| 8967 | lobit = mask & (relocation + addend); |
| 8968 | if (lobit != 0) |
| 8969 | { |
| 8970 | addend -= lobit; |
| 8971 | info->callbacks->einfo |
| 8972 | (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), |
| 8973 | input_bfd, input_section, rel->r_offset, |
| 8974 | howto->name, sym_name, mask + 1); |
| 8975 | bfd_set_error (bfd_error_bad_value); |
| 8976 | ret = FALSE; |
| 8977 | } |
| 8978 | addend += insn & mask; |
| 8979 | } |
| 8980 | break; |
| 8981 | } |
| 8982 | |
| 8983 | #ifdef DEBUG |
| 8984 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " |
| 8985 | "offset = %ld, addend = %ld\n", |
| 8986 | howto->name, |
| 8987 | (int) r_type, |
| 8988 | sym_name, |
| 8989 | r_symndx, |
| 8990 | (long) rel->r_offset, |
| 8991 | (long) addend); |
| 8992 | #endif |
| 8993 | |
| 8994 | if (unresolved_reloc |
| 8995 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 8996 | && h->def_dynamic) |
| 8997 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 8998 | rel->r_offset) != (bfd_vma) -1) |
| 8999 | { |
| 9000 | info->callbacks->einfo |
| 9001 | (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), |
| 9002 | input_bfd, input_section, rel->r_offset, |
| 9003 | howto->name, |
| 9004 | sym_name); |
| 9005 | ret = FALSE; |
| 9006 | } |
| 9007 | |
| 9008 | r = _bfd_final_link_relocate (howto, |
| 9009 | input_bfd, |
| 9010 | input_section, |
| 9011 | contents, |
| 9012 | rel->r_offset, |
| 9013 | relocation, |
| 9014 | addend); |
| 9015 | |
| 9016 | if (r != bfd_reloc_ok) |
| 9017 | { |
| 9018 | if (r == bfd_reloc_overflow) |
| 9019 | { |
| 9020 | if (warned) |
| 9021 | continue; |
| 9022 | if (h != NULL |
| 9023 | && h->root.type == bfd_link_hash_undefweak |
| 9024 | && howto->pc_relative) |
| 9025 | { |
| 9026 | /* Assume this is a call protected by other code that |
| 9027 | detect the symbol is undefined. If this is the case, |
| 9028 | we can safely ignore the overflow. If not, the |
| 9029 | program is hosed anyway, and a little warning isn't |
| 9030 | going to help. */ |
| 9031 | |
| 9032 | continue; |
| 9033 | } |
| 9034 | |
| 9035 | if (! (*info->callbacks->reloc_overflow) (info, |
| 9036 | (h ? &h->root : NULL), |
| 9037 | sym_name, |
| 9038 | howto->name, |
| 9039 | rel->r_addend, |
| 9040 | input_bfd, |
| 9041 | input_section, |
| 9042 | rel->r_offset)) |
| 9043 | return FALSE; |
| 9044 | } |
| 9045 | else |
| 9046 | { |
| 9047 | info->callbacks->einfo |
| 9048 | (_("%P: %H: %s reloc against `%s': error %d\n"), |
| 9049 | input_bfd, input_section, rel->r_offset, |
| 9050 | howto->name, sym_name, (int) r); |
| 9051 | ret = FALSE; |
| 9052 | } |
| 9053 | } |
| 9054 | } |
| 9055 | |
| 9056 | #ifdef DEBUG |
| 9057 | fprintf (stderr, "\n"); |
| 9058 | #endif |
| 9059 | |
| 9060 | return ret; |
| 9061 | } |
| 9062 | \f |
| 9063 | /* Finish up dynamic symbol handling. We set the contents of various |
| 9064 | dynamic sections here. */ |
| 9065 | |
| 9066 | static bfd_boolean |
| 9067 | ppc_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 9068 | struct bfd_link_info *info, |
| 9069 | struct elf_link_hash_entry *h, |
| 9070 | Elf_Internal_Sym *sym) |
| 9071 | { |
| 9072 | struct ppc_elf_link_hash_table *htab; |
| 9073 | struct plt_entry *ent; |
| 9074 | bfd_boolean doneone; |
| 9075 | |
| 9076 | #ifdef DEBUG |
| 9077 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| 9078 | h->root.root.string); |
| 9079 | #endif |
| 9080 | |
| 9081 | htab = ppc_elf_hash_table (info); |
| 9082 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 9083 | |
| 9084 | doneone = FALSE; |
| 9085 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 9086 | if (ent->plt.offset != (bfd_vma) -1) |
| 9087 | { |
| 9088 | if (!doneone) |
| 9089 | { |
| 9090 | Elf_Internal_Rela rela; |
| 9091 | bfd_byte *loc; |
| 9092 | bfd_vma reloc_index; |
| 9093 | |
| 9094 | if (htab->plt_type == PLT_NEW |
| 9095 | || !htab->elf.dynamic_sections_created |
| 9096 | || h->dynindx == -1) |
| 9097 | reloc_index = ent->plt.offset / 4; |
| 9098 | else |
| 9099 | { |
| 9100 | reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) |
| 9101 | / htab->plt_slot_size); |
| 9102 | if (reloc_index > PLT_NUM_SINGLE_ENTRIES |
| 9103 | && htab->plt_type == PLT_OLD) |
| 9104 | reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
| 9105 | } |
| 9106 | |
| 9107 | /* This symbol has an entry in the procedure linkage table. |
| 9108 | Set it up. */ |
| 9109 | if (htab->plt_type == PLT_VXWORKS |
| 9110 | && htab->elf.dynamic_sections_created |
| 9111 | && h->dynindx != -1) |
| 9112 | { |
| 9113 | bfd_vma got_offset; |
| 9114 | const bfd_vma *plt_entry; |
| 9115 | |
| 9116 | /* The first three entries in .got.plt are reserved. */ |
| 9117 | got_offset = (reloc_index + 3) * 4; |
| 9118 | |
| 9119 | /* Use the right PLT. */ |
| 9120 | plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry |
| 9121 | : ppc_elf_vxworks_plt_entry; |
| 9122 | |
| 9123 | /* Fill in the .plt on VxWorks. */ |
| 9124 | if (info->shared) |
| 9125 | { |
| 9126 | bfd_put_32 (output_bfd, |
| 9127 | plt_entry[0] | PPC_HA (got_offset), |
| 9128 | htab->plt->contents + ent->plt.offset + 0); |
| 9129 | bfd_put_32 (output_bfd, |
| 9130 | plt_entry[1] | PPC_LO (got_offset), |
| 9131 | htab->plt->contents + ent->plt.offset + 4); |
| 9132 | } |
| 9133 | else |
| 9134 | { |
| 9135 | bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); |
| 9136 | |
| 9137 | bfd_put_32 (output_bfd, |
| 9138 | plt_entry[0] | PPC_HA (got_loc), |
| 9139 | htab->plt->contents + ent->plt.offset + 0); |
| 9140 | bfd_put_32 (output_bfd, |
| 9141 | plt_entry[1] | PPC_LO (got_loc), |
| 9142 | htab->plt->contents + ent->plt.offset + 4); |
| 9143 | } |
| 9144 | |
| 9145 | bfd_put_32 (output_bfd, plt_entry[2], |
| 9146 | htab->plt->contents + ent->plt.offset + 8); |
| 9147 | bfd_put_32 (output_bfd, plt_entry[3], |
| 9148 | htab->plt->contents + ent->plt.offset + 12); |
| 9149 | |
| 9150 | /* This instruction is an immediate load. The value loaded is |
| 9151 | the byte offset of the R_PPC_JMP_SLOT relocation from the |
| 9152 | start of the .rela.plt section. The value is stored in the |
| 9153 | low-order 16 bits of the load instruction. */ |
| 9154 | /* NOTE: It appears that this is now an index rather than a |
| 9155 | prescaled offset. */ |
| 9156 | bfd_put_32 (output_bfd, |
| 9157 | plt_entry[4] | reloc_index, |
| 9158 | htab->plt->contents + ent->plt.offset + 16); |
| 9159 | /* This instruction is a PC-relative branch whose target is |
| 9160 | the start of the PLT section. The address of this branch |
| 9161 | instruction is 20 bytes beyond the start of this PLT entry. |
| 9162 | The address is encoded in bits 6-29, inclusive. The value |
| 9163 | stored is right-shifted by two bits, permitting a 26-bit |
| 9164 | offset. */ |
| 9165 | bfd_put_32 (output_bfd, |
| 9166 | (plt_entry[5] |
| 9167 | | (-(ent->plt.offset + 20) & 0x03fffffc)), |
| 9168 | htab->plt->contents + ent->plt.offset + 20); |
| 9169 | bfd_put_32 (output_bfd, plt_entry[6], |
| 9170 | htab->plt->contents + ent->plt.offset + 24); |
| 9171 | bfd_put_32 (output_bfd, plt_entry[7], |
| 9172 | htab->plt->contents + ent->plt.offset + 28); |
| 9173 | |
| 9174 | /* Fill in the GOT entry corresponding to this PLT slot with |
| 9175 | the address immediately after the "bctr" instruction |
| 9176 | in this PLT entry. */ |
| 9177 | bfd_put_32 (output_bfd, (htab->plt->output_section->vma |
| 9178 | + htab->plt->output_offset |
| 9179 | + ent->plt.offset + 16), |
| 9180 | htab->sgotplt->contents + got_offset); |
| 9181 | |
| 9182 | if (!info->shared) |
| 9183 | { |
| 9184 | /* Fill in a couple of entries in .rela.plt.unloaded. */ |
| 9185 | loc = htab->srelplt2->contents |
| 9186 | + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index |
| 9187 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) |
| 9188 | * sizeof (Elf32_External_Rela)); |
| 9189 | |
| 9190 | /* Provide the @ha relocation for the first instruction. */ |
| 9191 | rela.r_offset = (htab->plt->output_section->vma |
| 9192 | + htab->plt->output_offset |
| 9193 | + ent->plt.offset + 2); |
| 9194 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
| 9195 | R_PPC_ADDR16_HA); |
| 9196 | rela.r_addend = got_offset; |
| 9197 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9198 | loc += sizeof (Elf32_External_Rela); |
| 9199 | |
| 9200 | /* Provide the @l relocation for the second instruction. */ |
| 9201 | rela.r_offset = (htab->plt->output_section->vma |
| 9202 | + htab->plt->output_offset |
| 9203 | + ent->plt.offset + 6); |
| 9204 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
| 9205 | R_PPC_ADDR16_LO); |
| 9206 | rela.r_addend = got_offset; |
| 9207 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9208 | loc += sizeof (Elf32_External_Rela); |
| 9209 | |
| 9210 | /* Provide a relocation for the GOT entry corresponding to this |
| 9211 | PLT slot. Point it at the middle of the .plt entry. */ |
| 9212 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 9213 | + htab->sgotplt->output_offset |
| 9214 | + got_offset); |
| 9215 | rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, |
| 9216 | R_PPC_ADDR32); |
| 9217 | rela.r_addend = ent->plt.offset + 16; |
| 9218 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9219 | } |
| 9220 | |
| 9221 | /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. |
| 9222 | In particular, the offset for the relocation is not the |
| 9223 | address of the PLT entry for this function, as specified |
| 9224 | by the ABI. Instead, the offset is set to the address of |
| 9225 | the GOT slot for this function. See EABI 4.4.4.1. */ |
| 9226 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 9227 | + htab->sgotplt->output_offset |
| 9228 | + got_offset); |
| 9229 | |
| 9230 | } |
| 9231 | else |
| 9232 | { |
| 9233 | asection *splt = htab->plt; |
| 9234 | if (!htab->elf.dynamic_sections_created |
| 9235 | || h->dynindx == -1) |
| 9236 | splt = htab->iplt; |
| 9237 | |
| 9238 | rela.r_offset = (splt->output_section->vma |
| 9239 | + splt->output_offset |
| 9240 | + ent->plt.offset); |
| 9241 | if (htab->plt_type == PLT_OLD |
| 9242 | || !htab->elf.dynamic_sections_created |
| 9243 | || h->dynindx == -1) |
| 9244 | { |
| 9245 | /* We don't need to fill in the .plt. The ppc dynamic |
| 9246 | linker will fill it in. */ |
| 9247 | } |
| 9248 | else |
| 9249 | { |
| 9250 | bfd_vma val = (htab->glink_pltresolve + ent->plt.offset |
| 9251 | + htab->glink->output_section->vma |
| 9252 | + htab->glink->output_offset); |
| 9253 | bfd_put_32 (output_bfd, val, |
| 9254 | splt->contents + ent->plt.offset); |
| 9255 | } |
| 9256 | } |
| 9257 | |
| 9258 | /* Fill in the entry in the .rela.plt section. */ |
| 9259 | rela.r_addend = 0; |
| 9260 | if (!htab->elf.dynamic_sections_created |
| 9261 | || h->dynindx == -1) |
| 9262 | { |
| 9263 | BFD_ASSERT (h->type == STT_GNU_IFUNC |
| 9264 | && h->def_regular |
| 9265 | && (h->root.type == bfd_link_hash_defined |
| 9266 | || h->root.type == bfd_link_hash_defweak)); |
| 9267 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); |
| 9268 | rela.r_addend = SYM_VAL (h); |
| 9269 | } |
| 9270 | else |
| 9271 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 9272 | |
| 9273 | if (!htab->elf.dynamic_sections_created |
| 9274 | || h->dynindx == -1) |
| 9275 | loc = (htab->reliplt->contents |
| 9276 | + (htab->reliplt->reloc_count++ |
| 9277 | * sizeof (Elf32_External_Rela))); |
| 9278 | else |
| 9279 | loc = (htab->relplt->contents |
| 9280 | + reloc_index * sizeof (Elf32_External_Rela)); |
| 9281 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9282 | |
| 9283 | if (!h->def_regular) |
| 9284 | { |
| 9285 | /* Mark the symbol as undefined, rather than as |
| 9286 | defined in the .plt section. Leave the value if |
| 9287 | there were any relocations where pointer equality |
| 9288 | matters (this is a clue for the dynamic linker, to |
| 9289 | make function pointer comparisons work between an |
| 9290 | application and shared library), otherwise set it |
| 9291 | to zero. */ |
| 9292 | sym->st_shndx = SHN_UNDEF; |
| 9293 | if (!h->pointer_equality_needed) |
| 9294 | sym->st_value = 0; |
| 9295 | else if (!h->ref_regular_nonweak) |
| 9296 | { |
| 9297 | /* This breaks function pointer comparisons, but |
| 9298 | that is better than breaking tests for a NULL |
| 9299 | function pointer. */ |
| 9300 | sym->st_value = 0; |
| 9301 | } |
| 9302 | } |
| 9303 | else if (h->type == STT_GNU_IFUNC |
| 9304 | && !info->shared) |
| 9305 | { |
| 9306 | /* Set the value of ifunc symbols in a non-pie |
| 9307 | executable to the glink entry. This is to avoid |
| 9308 | text relocations. We can't do this for ifunc in |
| 9309 | allocate_dynrelocs, as we do for normal dynamic |
| 9310 | function symbols with plt entries, because we need |
| 9311 | to keep the original value around for the ifunc |
| 9312 | relocation. */ |
| 9313 | sym->st_shndx = (_bfd_elf_section_from_bfd_section |
| 9314 | (output_bfd, htab->glink->output_section)); |
| 9315 | sym->st_value = (ent->glink_offset |
| 9316 | + htab->glink->output_offset |
| 9317 | + htab->glink->output_section->vma); |
| 9318 | } |
| 9319 | doneone = TRUE; |
| 9320 | } |
| 9321 | |
| 9322 | if (htab->plt_type == PLT_NEW |
| 9323 | || !htab->elf.dynamic_sections_created |
| 9324 | || h->dynindx == -1) |
| 9325 | { |
| 9326 | unsigned char *p; |
| 9327 | asection *splt = htab->plt; |
| 9328 | if (!htab->elf.dynamic_sections_created |
| 9329 | || h->dynindx == -1) |
| 9330 | splt = htab->iplt; |
| 9331 | |
| 9332 | p = (unsigned char *) htab->glink->contents + ent->glink_offset; |
| 9333 | |
| 9334 | if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt) |
| 9335 | { |
| 9336 | bfd_put_32 (output_bfd, LWZ_11_3, p); |
| 9337 | p += 4; |
| 9338 | bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); |
| 9339 | p += 4; |
| 9340 | bfd_put_32 (output_bfd, MR_0_3, p); |
| 9341 | p += 4; |
| 9342 | bfd_put_32 (output_bfd, CMPWI_11_0, p); |
| 9343 | p += 4; |
| 9344 | bfd_put_32 (output_bfd, ADD_3_12_2, p); |
| 9345 | p += 4; |
| 9346 | bfd_put_32 (output_bfd, BEQLR, p); |
| 9347 | p += 4; |
| 9348 | bfd_put_32 (output_bfd, MR_3_0, p); |
| 9349 | p += 4; |
| 9350 | bfd_put_32 (output_bfd, NOP, p); |
| 9351 | p += 4; |
| 9352 | } |
| 9353 | |
| 9354 | write_glink_stub (ent, splt, p, info); |
| 9355 | |
| 9356 | if (!info->shared) |
| 9357 | /* We only need one non-PIC glink stub. */ |
| 9358 | break; |
| 9359 | } |
| 9360 | else |
| 9361 | break; |
| 9362 | } |
| 9363 | |
| 9364 | if (h->needs_copy) |
| 9365 | { |
| 9366 | asection *s; |
| 9367 | Elf_Internal_Rela rela; |
| 9368 | bfd_byte *loc; |
| 9369 | |
| 9370 | /* This symbols needs a copy reloc. Set it up. */ |
| 9371 | |
| 9372 | #ifdef DEBUG |
| 9373 | fprintf (stderr, ", copy"); |
| 9374 | #endif |
| 9375 | |
| 9376 | BFD_ASSERT (h->dynindx != -1); |
| 9377 | |
| 9378 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
| 9379 | s = htab->relsbss; |
| 9380 | else |
| 9381 | s = htab->relbss; |
| 9382 | BFD_ASSERT (s != NULL); |
| 9383 | |
| 9384 | rela.r_offset = SYM_VAL (h); |
| 9385 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 9386 | rela.r_addend = 0; |
| 9387 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 9388 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9389 | } |
| 9390 | |
| 9391 | #ifdef DEBUG |
| 9392 | fprintf (stderr, "\n"); |
| 9393 | #endif |
| 9394 | |
| 9395 | return TRUE; |
| 9396 | } |
| 9397 | \f |
| 9398 | static enum elf_reloc_type_class |
| 9399 | ppc_elf_reloc_type_class (const struct bfd_link_info *info, |
| 9400 | const asection *rel_sec, |
| 9401 | const Elf_Internal_Rela *rela) |
| 9402 | { |
| 9403 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 9404 | |
| 9405 | if (rel_sec == htab->reliplt) |
| 9406 | return reloc_class_ifunc; |
| 9407 | |
| 9408 | switch (ELF32_R_TYPE (rela->r_info)) |
| 9409 | { |
| 9410 | case R_PPC_RELATIVE: |
| 9411 | return reloc_class_relative; |
| 9412 | case R_PPC_JMP_SLOT: |
| 9413 | return reloc_class_plt; |
| 9414 | case R_PPC_COPY: |
| 9415 | return reloc_class_copy; |
| 9416 | default: |
| 9417 | return reloc_class_normal; |
| 9418 | } |
| 9419 | } |
| 9420 | \f |
| 9421 | /* Finish up the dynamic sections. */ |
| 9422 | |
| 9423 | static bfd_boolean |
| 9424 | ppc_elf_finish_dynamic_sections (bfd *output_bfd, |
| 9425 | struct bfd_link_info *info) |
| 9426 | { |
| 9427 | asection *sdyn; |
| 9428 | asection *splt; |
| 9429 | struct ppc_elf_link_hash_table *htab; |
| 9430 | bfd_vma got; |
| 9431 | bfd *dynobj; |
| 9432 | bfd_boolean ret = TRUE; |
| 9433 | |
| 9434 | #ifdef DEBUG |
| 9435 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 9436 | #endif |
| 9437 | |
| 9438 | htab = ppc_elf_hash_table (info); |
| 9439 | dynobj = elf_hash_table (info)->dynobj; |
| 9440 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 9441 | if (htab->is_vxworks) |
| 9442 | splt = bfd_get_linker_section (dynobj, ".plt"); |
| 9443 | else |
| 9444 | splt = NULL; |
| 9445 | |
| 9446 | got = 0; |
| 9447 | if (htab->elf.hgot != NULL) |
| 9448 | got = SYM_VAL (htab->elf.hgot); |
| 9449 | |
| 9450 | if (htab->elf.dynamic_sections_created) |
| 9451 | { |
| 9452 | Elf32_External_Dyn *dyncon, *dynconend; |
| 9453 | |
| 9454 | BFD_ASSERT (htab->plt != NULL && sdyn != NULL); |
| 9455 | |
| 9456 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 9457 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 9458 | for (; dyncon < dynconend; dyncon++) |
| 9459 | { |
| 9460 | Elf_Internal_Dyn dyn; |
| 9461 | asection *s; |
| 9462 | |
| 9463 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 9464 | |
| 9465 | switch (dyn.d_tag) |
| 9466 | { |
| 9467 | case DT_PLTGOT: |
| 9468 | if (htab->is_vxworks) |
| 9469 | s = htab->sgotplt; |
| 9470 | else |
| 9471 | s = htab->plt; |
| 9472 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 9473 | break; |
| 9474 | |
| 9475 | case DT_PLTRELSZ: |
| 9476 | dyn.d_un.d_val = htab->relplt->size; |
| 9477 | break; |
| 9478 | |
| 9479 | case DT_JMPREL: |
| 9480 | s = htab->relplt; |
| 9481 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 9482 | break; |
| 9483 | |
| 9484 | case DT_PPC_GOT: |
| 9485 | dyn.d_un.d_ptr = got; |
| 9486 | break; |
| 9487 | |
| 9488 | case DT_RELASZ: |
| 9489 | if (htab->is_vxworks) |
| 9490 | { |
| 9491 | if (htab->relplt) |
| 9492 | dyn.d_un.d_ptr -= htab->relplt->size; |
| 9493 | break; |
| 9494 | } |
| 9495 | continue; |
| 9496 | |
| 9497 | default: |
| 9498 | if (htab->is_vxworks |
| 9499 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
| 9500 | break; |
| 9501 | continue; |
| 9502 | } |
| 9503 | |
| 9504 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 9505 | } |
| 9506 | } |
| 9507 | |
| 9508 | if (htab->got != NULL) |
| 9509 | { |
| 9510 | if (htab->elf.hgot->root.u.def.section == htab->got |
| 9511 | || htab->elf.hgot->root.u.def.section == htab->sgotplt) |
| 9512 | { |
| 9513 | unsigned char *p = htab->elf.hgot->root.u.def.section->contents; |
| 9514 | |
| 9515 | p += htab->elf.hgot->root.u.def.value; |
| 9516 | if (htab->plt_type == PLT_OLD) |
| 9517 | { |
| 9518 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 |
| 9519 | so that a function can easily find the address of |
| 9520 | _GLOBAL_OFFSET_TABLE_. */ |
| 9521 | BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 |
| 9522 | < htab->elf.hgot->root.u.def.section->size); |
| 9523 | bfd_put_32 (output_bfd, 0x4e800021, p - 4); |
| 9524 | } |
| 9525 | |
| 9526 | if (sdyn != NULL) |
| 9527 | { |
| 9528 | bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; |
| 9529 | BFD_ASSERT (htab->elf.hgot->root.u.def.value |
| 9530 | < htab->elf.hgot->root.u.def.section->size); |
| 9531 | bfd_put_32 (output_bfd, val, p); |
| 9532 | } |
| 9533 | } |
| 9534 | else |
| 9535 | { |
| 9536 | info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), |
| 9537 | htab->elf.hgot->root.root.string, |
| 9538 | (htab->sgotplt != NULL |
| 9539 | ? htab->sgotplt->name : htab->got->name)); |
| 9540 | bfd_set_error (bfd_error_bad_value); |
| 9541 | ret = FALSE; |
| 9542 | } |
| 9543 | |
| 9544 | elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; |
| 9545 | } |
| 9546 | |
| 9547 | /* Fill in the first entry in the VxWorks procedure linkage table. */ |
| 9548 | if (splt && splt->size > 0) |
| 9549 | { |
| 9550 | /* Use the right PLT. */ |
| 9551 | const bfd_vma *plt_entry = (info->shared |
| 9552 | ? ppc_elf_vxworks_pic_plt0_entry |
| 9553 | : ppc_elf_vxworks_plt0_entry); |
| 9554 | |
| 9555 | if (!info->shared) |
| 9556 | { |
| 9557 | bfd_vma got_value = SYM_VAL (htab->elf.hgot); |
| 9558 | |
| 9559 | bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), |
| 9560 | splt->contents + 0); |
| 9561 | bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), |
| 9562 | splt->contents + 4); |
| 9563 | } |
| 9564 | else |
| 9565 | { |
| 9566 | bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); |
| 9567 | bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); |
| 9568 | } |
| 9569 | bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); |
| 9570 | bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); |
| 9571 | bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); |
| 9572 | bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); |
| 9573 | bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); |
| 9574 | bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); |
| 9575 | |
| 9576 | if (! info->shared) |
| 9577 | { |
| 9578 | Elf_Internal_Rela rela; |
| 9579 | bfd_byte *loc; |
| 9580 | |
| 9581 | loc = htab->srelplt2->contents; |
| 9582 | |
| 9583 | /* Output the @ha relocation for the first instruction. */ |
| 9584 | rela.r_offset = (htab->plt->output_section->vma |
| 9585 | + htab->plt->output_offset |
| 9586 | + 2); |
| 9587 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
| 9588 | rela.r_addend = 0; |
| 9589 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9590 | loc += sizeof (Elf32_External_Rela); |
| 9591 | |
| 9592 | /* Output the @l relocation for the second instruction. */ |
| 9593 | rela.r_offset = (htab->plt->output_section->vma |
| 9594 | + htab->plt->output_offset |
| 9595 | + 6); |
| 9596 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
| 9597 | rela.r_addend = 0; |
| 9598 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 9599 | loc += sizeof (Elf32_External_Rela); |
| 9600 | |
| 9601 | /* Fix up the remaining relocations. They may have the wrong |
| 9602 | symbol index for _G_O_T_ or _P_L_T_ depending on the order |
| 9603 | in which symbols were output. */ |
| 9604 | while (loc < htab->srelplt2->contents + htab->srelplt2->size) |
| 9605 | { |
| 9606 | Elf_Internal_Rela rel; |
| 9607 | |
| 9608 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 9609 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
| 9610 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 9611 | loc += sizeof (Elf32_External_Rela); |
| 9612 | |
| 9613 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 9614 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
| 9615 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 9616 | loc += sizeof (Elf32_External_Rela); |
| 9617 | |
| 9618 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); |
| 9619 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); |
| 9620 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 9621 | loc += sizeof (Elf32_External_Rela); |
| 9622 | } |
| 9623 | } |
| 9624 | } |
| 9625 | |
| 9626 | if (htab->glink != NULL |
| 9627 | && htab->glink->contents != NULL |
| 9628 | && htab->elf.dynamic_sections_created) |
| 9629 | { |
| 9630 | unsigned char *p; |
| 9631 | unsigned char *endp; |
| 9632 | bfd_vma res0; |
| 9633 | unsigned int i; |
| 9634 | |
| 9635 | /* |
| 9636 | * PIC glink code is the following: |
| 9637 | * |
| 9638 | * # ith PLT code stub. |
| 9639 | * addis 11,30,(plt+(i-1)*4-got)@ha |
| 9640 | * lwz 11,(plt+(i-1)*4-got)@l(11) |
| 9641 | * mtctr 11 |
| 9642 | * bctr |
| 9643 | * |
| 9644 | * # A table of branches, one for each plt entry. |
| 9645 | * # The idea is that the plt call stub loads ctr and r11 with these |
| 9646 | * # addresses, so (r11 - res_0) gives the plt index * 4. |
| 9647 | * res_0: b PLTresolve |
| 9648 | * res_1: b PLTresolve |
| 9649 | * . |
| 9650 | * # Some number of entries towards the end can be nops |
| 9651 | * res_n_m3: nop |
| 9652 | * res_n_m2: nop |
| 9653 | * res_n_m1: |
| 9654 | * |
| 9655 | * PLTresolve: |
| 9656 | * addis 11,11,(1f-res_0)@ha |
| 9657 | * mflr 0 |
| 9658 | * bcl 20,31,1f |
| 9659 | * 1: addi 11,11,(1b-res_0)@l |
| 9660 | * mflr 12 |
| 9661 | * mtlr 0 |
| 9662 | * sub 11,11,12 # r11 = index * 4 |
| 9663 | * addis 12,12,(got+4-1b)@ha |
| 9664 | * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve |
| 9665 | * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address |
| 9666 | * mtctr 0 |
| 9667 | * add 0,11,11 |
| 9668 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
| 9669 | * bctr |
| 9670 | */ |
| 9671 | static const unsigned int pic_plt_resolve[] = |
| 9672 | { |
| 9673 | ADDIS_11_11, |
| 9674 | MFLR_0, |
| 9675 | BCL_20_31, |
| 9676 | ADDI_11_11, |
| 9677 | MFLR_12, |
| 9678 | MTLR_0, |
| 9679 | SUB_11_11_12, |
| 9680 | ADDIS_12_12, |
| 9681 | LWZ_0_12, |
| 9682 | LWZ_12_12, |
| 9683 | MTCTR_0, |
| 9684 | ADD_0_11_11, |
| 9685 | ADD_11_0_11, |
| 9686 | BCTR, |
| 9687 | NOP, |
| 9688 | NOP |
| 9689 | }; |
| 9690 | |
| 9691 | /* |
| 9692 | * Non-PIC glink code is a little simpler. |
| 9693 | * |
| 9694 | * # ith PLT code stub. |
| 9695 | * lis 11,(plt+(i-1)*4)@ha |
| 9696 | * lwz 11,(plt+(i-1)*4)@l(11) |
| 9697 | * mtctr 11 |
| 9698 | * bctr |
| 9699 | * |
| 9700 | * The branch table is the same, then comes |
| 9701 | * |
| 9702 | * PLTresolve: |
| 9703 | * lis 12,(got+4)@ha |
| 9704 | * addis 11,11,(-res_0)@ha |
| 9705 | * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve |
| 9706 | * addi 11,11,(-res_0)@l # r11 = index * 4 |
| 9707 | * mtctr 0 |
| 9708 | * add 0,11,11 |
| 9709 | * lwz 12,(got+8)@l(12) # got[2] contains the map address |
| 9710 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
| 9711 | * bctr |
| 9712 | */ |
| 9713 | static const unsigned int plt_resolve[] = |
| 9714 | { |
| 9715 | LIS_12, |
| 9716 | ADDIS_11_11, |
| 9717 | LWZ_0_12, |
| 9718 | ADDI_11_11, |
| 9719 | MTCTR_0, |
| 9720 | ADD_0_11_11, |
| 9721 | LWZ_12_12, |
| 9722 | ADD_11_0_11, |
| 9723 | BCTR, |
| 9724 | NOP, |
| 9725 | NOP, |
| 9726 | NOP, |
| 9727 | NOP, |
| 9728 | NOP, |
| 9729 | NOP, |
| 9730 | NOP |
| 9731 | }; |
| 9732 | |
| 9733 | if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) |
| 9734 | abort (); |
| 9735 | if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) |
| 9736 | abort (); |
| 9737 | |
| 9738 | /* Build the branch table, one for each plt entry (less one), |
| 9739 | and perhaps some padding. */ |
| 9740 | p = htab->glink->contents; |
| 9741 | p += htab->glink_pltresolve; |
| 9742 | endp = htab->glink->contents; |
| 9743 | endp += htab->glink->size - GLINK_PLTRESOLVE; |
| 9744 | while (p < endp - 8 * 4) |
| 9745 | { |
| 9746 | bfd_put_32 (output_bfd, B + endp - p, p); |
| 9747 | p += 4; |
| 9748 | } |
| 9749 | while (p < endp) |
| 9750 | { |
| 9751 | bfd_put_32 (output_bfd, NOP, p); |
| 9752 | p += 4; |
| 9753 | } |
| 9754 | |
| 9755 | res0 = (htab->glink_pltresolve |
| 9756 | + htab->glink->output_section->vma |
| 9757 | + htab->glink->output_offset); |
| 9758 | |
| 9759 | /* Last comes the PLTresolve stub. */ |
| 9760 | if (info->shared) |
| 9761 | { |
| 9762 | bfd_vma bcl; |
| 9763 | |
| 9764 | for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) |
| 9765 | { |
| 9766 | bfd_put_32 (output_bfd, pic_plt_resolve[i], p); |
| 9767 | p += 4; |
| 9768 | } |
| 9769 | p -= 4 * ARRAY_SIZE (pic_plt_resolve); |
| 9770 | |
| 9771 | bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 |
| 9772 | + htab->glink->output_section->vma |
| 9773 | + htab->glink->output_offset); |
| 9774 | |
| 9775 | bfd_put_32 (output_bfd, |
| 9776 | ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); |
| 9777 | bfd_put_32 (output_bfd, |
| 9778 | ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); |
| 9779 | bfd_put_32 (output_bfd, |
| 9780 | ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); |
| 9781 | if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) |
| 9782 | { |
| 9783 | bfd_put_32 (output_bfd, |
| 9784 | LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); |
| 9785 | bfd_put_32 (output_bfd, |
| 9786 | LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); |
| 9787 | } |
| 9788 | else |
| 9789 | { |
| 9790 | bfd_put_32 (output_bfd, |
| 9791 | LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); |
| 9792 | bfd_put_32 (output_bfd, |
| 9793 | LWZ_12_12 + 4, p + 9*4); |
| 9794 | } |
| 9795 | } |
| 9796 | else |
| 9797 | { |
| 9798 | for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) |
| 9799 | { |
| 9800 | bfd_put_32 (output_bfd, plt_resolve[i], p); |
| 9801 | p += 4; |
| 9802 | } |
| 9803 | p -= 4 * ARRAY_SIZE (plt_resolve); |
| 9804 | |
| 9805 | bfd_put_32 (output_bfd, |
| 9806 | LIS_12 + PPC_HA (got + 4), p + 0*4); |
| 9807 | bfd_put_32 (output_bfd, |
| 9808 | ADDIS_11_11 + PPC_HA (-res0), p + 1*4); |
| 9809 | bfd_put_32 (output_bfd, |
| 9810 | ADDI_11_11 + PPC_LO (-res0), p + 3*4); |
| 9811 | if (PPC_HA (got + 4) == PPC_HA (got + 8)) |
| 9812 | { |
| 9813 | bfd_put_32 (output_bfd, |
| 9814 | LWZ_0_12 + PPC_LO (got + 4), p + 2*4); |
| 9815 | bfd_put_32 (output_bfd, |
| 9816 | LWZ_12_12 + PPC_LO (got + 8), p + 6*4); |
| 9817 | } |
| 9818 | else |
| 9819 | { |
| 9820 | bfd_put_32 (output_bfd, |
| 9821 | LWZU_0_12 + PPC_LO (got + 4), p + 2*4); |
| 9822 | bfd_put_32 (output_bfd, |
| 9823 | LWZ_12_12 + 4, p + 6*4); |
| 9824 | } |
| 9825 | } |
| 9826 | } |
| 9827 | |
| 9828 | if (htab->glink_eh_frame != NULL |
| 9829 | && htab->glink_eh_frame->contents != NULL) |
| 9830 | { |
| 9831 | unsigned char *p = htab->glink_eh_frame->contents; |
| 9832 | bfd_vma val; |
| 9833 | |
| 9834 | p += sizeof (glink_eh_frame_cie); |
| 9835 | /* FDE length. */ |
| 9836 | p += 4; |
| 9837 | /* CIE pointer. */ |
| 9838 | p += 4; |
| 9839 | /* Offset to .glink. */ |
| 9840 | val = (htab->glink->output_section->vma |
| 9841 | + htab->glink->output_offset); |
| 9842 | val -= (htab->glink_eh_frame->output_section->vma |
| 9843 | + htab->glink_eh_frame->output_offset); |
| 9844 | val -= p - htab->glink_eh_frame->contents; |
| 9845 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 9846 | |
| 9847 | if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME |
| 9848 | && !_bfd_elf_write_section_eh_frame (output_bfd, info, |
| 9849 | htab->glink_eh_frame, |
| 9850 | htab->glink_eh_frame->contents)) |
| 9851 | return FALSE; |
| 9852 | } |
| 9853 | |
| 9854 | return ret; |
| 9855 | } |
| 9856 | \f |
| 9857 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 9858 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 9859 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 9860 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 9861 | #define ELF_ARCH bfd_arch_powerpc |
| 9862 | #define ELF_TARGET_ID PPC32_ELF_DATA |
| 9863 | #define ELF_MACHINE_CODE EM_PPC |
| 9864 | #ifdef __QNXTARGET__ |
| 9865 | #define ELF_MAXPAGESIZE 0x1000 |
| 9866 | #else |
| 9867 | #define ELF_MAXPAGESIZE 0x10000 |
| 9868 | #endif |
| 9869 | #define ELF_MINPAGESIZE 0x1000 |
| 9870 | #define ELF_COMMONPAGESIZE 0x1000 |
| 9871 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 9872 | |
| 9873 | #ifdef EM_CYGNUS_POWERPC |
| 9874 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 9875 | #endif |
| 9876 | |
| 9877 | #ifdef EM_PPC_OLD |
| 9878 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 9879 | #endif |
| 9880 | |
| 9881 | #define elf_backend_plt_not_loaded 1 |
| 9882 | #define elf_backend_can_gc_sections 1 |
| 9883 | #define elf_backend_can_refcount 1 |
| 9884 | #define elf_backend_rela_normal 1 |
| 9885 | |
| 9886 | #define bfd_elf32_mkobject ppc_elf_mkobject |
| 9887 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 9888 | #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
| 9889 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 9890 | #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup |
| 9891 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 9892 | #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create |
| 9893 | #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab |
| 9894 | |
| 9895 | #define elf_backend_object_p ppc_elf_object_p |
| 9896 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| 9897 | #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| 9898 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 9899 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 9900 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| 9901 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 9902 | #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol |
| 9903 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 9904 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 9905 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 9906 | #define elf_backend_hash_symbol ppc_elf_hash_symbol |
| 9907 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 9908 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 9909 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 9910 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 9911 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| 9912 | #define elf_backend_grok_prstatus ppc_elf_grok_prstatus |
| 9913 | #define elf_backend_grok_psinfo ppc_elf_grok_psinfo |
| 9914 | #define elf_backend_write_core_note ppc_elf_write_core_note |
| 9915 | #define elf_backend_reloc_type_class ppc_elf_reloc_type_class |
| 9916 | #define elf_backend_begin_write_processing ppc_elf_begin_write_processing |
| 9917 | #define elf_backend_final_write_processing ppc_elf_final_write_processing |
| 9918 | #define elf_backend_write_section ppc_elf_write_section |
| 9919 | #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr |
| 9920 | #define elf_backend_plt_sym_val ppc_elf_plt_sym_val |
| 9921 | #define elf_backend_action_discarded ppc_elf_action_discarded |
| 9922 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 9923 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
| 9924 | #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags |
| 9925 | #define elf_backend_section_processing ppc_elf_section_processing |
| 9926 | |
| 9927 | #include "elf32-target.h" |
| 9928 | |
| 9929 | /* FreeBSD Target */ |
| 9930 | |
| 9931 | #undef TARGET_LITTLE_SYM |
| 9932 | #undef TARGET_LITTLE_NAME |
| 9933 | |
| 9934 | #undef TARGET_BIG_SYM |
| 9935 | #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec |
| 9936 | #undef TARGET_BIG_NAME |
| 9937 | #define TARGET_BIG_NAME "elf32-powerpc-freebsd" |
| 9938 | |
| 9939 | #undef ELF_OSABI |
| 9940 | #define ELF_OSABI ELFOSABI_FREEBSD |
| 9941 | |
| 9942 | #undef elf32_bed |
| 9943 | #define elf32_bed elf32_powerpc_fbsd_bed |
| 9944 | |
| 9945 | #include "elf32-target.h" |
| 9946 | |
| 9947 | /* VxWorks Target */ |
| 9948 | |
| 9949 | #undef TARGET_LITTLE_SYM |
| 9950 | #undef TARGET_LITTLE_NAME |
| 9951 | |
| 9952 | #undef TARGET_BIG_SYM |
| 9953 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec |
| 9954 | #undef TARGET_BIG_NAME |
| 9955 | #define TARGET_BIG_NAME "elf32-powerpc-vxworks" |
| 9956 | |
| 9957 | #undef ELF_OSABI |
| 9958 | |
| 9959 | /* VxWorks uses the elf default section flags for .plt. */ |
| 9960 | static const struct bfd_elf_special_section * |
| 9961 | ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) |
| 9962 | { |
| 9963 | if (sec->name == NULL) |
| 9964 | return NULL; |
| 9965 | |
| 9966 | if (strcmp (sec->name, ".plt") == 0) |
| 9967 | return _bfd_elf_get_sec_type_attr (abfd, sec); |
| 9968 | |
| 9969 | return ppc_elf_get_sec_type_attr (abfd, sec); |
| 9970 | } |
| 9971 | |
| 9972 | /* Like ppc_elf_link_hash_table_create, but overrides |
| 9973 | appropriately for VxWorks. */ |
| 9974 | static struct bfd_link_hash_table * |
| 9975 | ppc_elf_vxworks_link_hash_table_create (bfd *abfd) |
| 9976 | { |
| 9977 | struct bfd_link_hash_table *ret; |
| 9978 | |
| 9979 | ret = ppc_elf_link_hash_table_create (abfd); |
| 9980 | if (ret) |
| 9981 | { |
| 9982 | struct ppc_elf_link_hash_table *htab |
| 9983 | = (struct ppc_elf_link_hash_table *)ret; |
| 9984 | htab->is_vxworks = 1; |
| 9985 | htab->plt_type = PLT_VXWORKS; |
| 9986 | htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; |
| 9987 | htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; |
| 9988 | htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; |
| 9989 | } |
| 9990 | return ret; |
| 9991 | } |
| 9992 | |
| 9993 | /* Tweak magic VxWorks symbols as they are loaded. */ |
| 9994 | static bfd_boolean |
| 9995 | ppc_elf_vxworks_add_symbol_hook (bfd *abfd, |
| 9996 | struct bfd_link_info *info, |
| 9997 | Elf_Internal_Sym *sym, |
| 9998 | const char **namep ATTRIBUTE_UNUSED, |
| 9999 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 10000 | asection **secp, |
| 10001 | bfd_vma *valp) |
| 10002 | { |
| 10003 | if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, |
| 10004 | valp)) |
| 10005 | return FALSE; |
| 10006 | |
| 10007 | return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); |
| 10008 | } |
| 10009 | |
| 10010 | static void |
| 10011 | ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) |
| 10012 | { |
| 10013 | ppc_elf_final_write_processing(abfd, linker); |
| 10014 | elf_vxworks_final_write_processing(abfd, linker); |
| 10015 | } |
| 10016 | |
| 10017 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so |
| 10018 | define it. */ |
| 10019 | #undef elf_backend_want_plt_sym |
| 10020 | #define elf_backend_want_plt_sym 1 |
| 10021 | #undef elf_backend_want_got_plt |
| 10022 | #define elf_backend_want_got_plt 1 |
| 10023 | #undef elf_backend_got_symbol_offset |
| 10024 | #define elf_backend_got_symbol_offset 0 |
| 10025 | #undef elf_backend_plt_not_loaded |
| 10026 | #define elf_backend_plt_not_loaded 0 |
| 10027 | #undef elf_backend_plt_readonly |
| 10028 | #define elf_backend_plt_readonly 1 |
| 10029 | #undef elf_backend_got_header_size |
| 10030 | #define elf_backend_got_header_size 12 |
| 10031 | |
| 10032 | #undef bfd_elf32_get_synthetic_symtab |
| 10033 | |
| 10034 | #undef bfd_elf32_bfd_link_hash_table_create |
| 10035 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 10036 | ppc_elf_vxworks_link_hash_table_create |
| 10037 | #undef elf_backend_add_symbol_hook |
| 10038 | #define elf_backend_add_symbol_hook \ |
| 10039 | ppc_elf_vxworks_add_symbol_hook |
| 10040 | #undef elf_backend_link_output_symbol_hook |
| 10041 | #define elf_backend_link_output_symbol_hook \ |
| 10042 | elf_vxworks_link_output_symbol_hook |
| 10043 | #undef elf_backend_final_write_processing |
| 10044 | #define elf_backend_final_write_processing \ |
| 10045 | ppc_elf_vxworks_final_write_processing |
| 10046 | #undef elf_backend_get_sec_type_attr |
| 10047 | #define elf_backend_get_sec_type_attr \ |
| 10048 | ppc_elf_vxworks_get_sec_type_attr |
| 10049 | #undef elf_backend_emit_relocs |
| 10050 | #define elf_backend_emit_relocs \ |
| 10051 | elf_vxworks_emit_relocs |
| 10052 | |
| 10053 | #undef elf32_bed |
| 10054 | #define elf32_bed ppc_elf_vxworks_bed |
| 10055 | #undef elf_backend_post_process_headers |
| 10056 | |
| 10057 | #include "elf32-target.h" |