| 1 | /* DLX specific support for 32-bit ELF |
| 2 | Copyright 2002, 2003, 2004 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "bfd.h" |
| 21 | #include "sysdep.h" |
| 22 | #include "libbfd.h" |
| 23 | #include "elf-bfd.h" |
| 24 | #include "elf/dlx.h" |
| 25 | |
| 26 | int set_dlx_skip_hi16_flag PARAMS ((int)); |
| 27 | |
| 28 | static bfd_boolean elf32_dlx_check_relocs |
| 29 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 30 | const Elf_Internal_Rela *)); |
| 31 | static void elf32_dlx_info_to_howto |
| 32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 33 | static void elf32_dlx_info_to_howto_rel |
| 34 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 35 | static bfd_reloc_status_type elf32_dlx_relocate16 |
| 36 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 37 | static bfd_reloc_status_type elf32_dlx_relocate26 |
| 38 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 39 | static reloc_howto_type *elf32_dlx_reloc_type_lookup |
| 40 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 41 | static bfd_reloc_status_type _bfd_dlx_elf_hi16_reloc |
| 42 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 43 | static reloc_howto_type * dlx_rtype_to_howto |
| 44 | PARAMS ((unsigned int)); |
| 45 | |
| 46 | |
| 47 | #define USE_REL 1 |
| 48 | |
| 49 | #define bfd_elf32_bfd_reloc_type_lookup elf32_dlx_reloc_type_lookup |
| 50 | #define elf_info_to_howto elf32_dlx_info_to_howto |
| 51 | #define elf_info_to_howto_rel elf32_dlx_info_to_howto_rel |
| 52 | #define elf_backend_check_relocs elf32_dlx_check_relocs |
| 53 | |
| 54 | static reloc_howto_type dlx_elf_howto_table[]= |
| 55 | { |
| 56 | /* No relocation. */ |
| 57 | HOWTO (R_DLX_NONE, /* type */ |
| 58 | 0, /* rightshift */ |
| 59 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 60 | 0, /* bitsize */ |
| 61 | FALSE, /* pc_relative */ |
| 62 | 0, /* bitpos */ |
| 63 | complain_overflow_dont,/* complain_on_overflow */ |
| 64 | bfd_elf_generic_reloc, /* special_function */ |
| 65 | "R_DLX_NONE", /* name */ |
| 66 | FALSE, /* partial_inplace */ |
| 67 | 0, /* src_mask */ |
| 68 | 0, /* dst_mask */ |
| 69 | FALSE), /* pcrel_offset */ |
| 70 | |
| 71 | /* 8 bit relocation. */ |
| 72 | HOWTO (R_DLX_RELOC_8, /* type */ |
| 73 | 0, /* rightshift */ |
| 74 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 75 | 8, /* bitsize */ |
| 76 | FALSE, /* pc_relative */ |
| 77 | 0, /* bitpos */ |
| 78 | complain_overflow_dont,/* complain_on_overflow */ |
| 79 | bfd_elf_generic_reloc, /* special_function */ |
| 80 | "R_DLX_RELOC_8", /* name */ |
| 81 | TRUE, /* partial_inplace */ |
| 82 | 0xff, /* src_mask */ |
| 83 | 0xff, /* dst_mask */ |
| 84 | FALSE), /* pcrel_offset */ |
| 85 | |
| 86 | /* 16 bit relocation. */ |
| 87 | HOWTO (R_DLX_RELOC_16, /* type */ |
| 88 | 0, /* rightshift */ |
| 89 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 90 | 16, /* bitsize */ |
| 91 | FALSE, /* pc_relative */ |
| 92 | 0, /* bitpos */ |
| 93 | complain_overflow_dont,/* complain_on_overflow */ |
| 94 | bfd_elf_generic_reloc, /* special_function */ |
| 95 | "R_DLX_RELOC_16", /* name */ |
| 96 | TRUE, /* partial_inplace */ |
| 97 | 0xffff, /* src_mask */ |
| 98 | 0xffff, /* dst_mask */ |
| 99 | FALSE), /* pcrel_offset */ |
| 100 | |
| 101 | #if 0 |
| 102 | /* 26 bit jump address. */ |
| 103 | HOWTO (R_DLX_RELOC_26, /* type */ |
| 104 | 0, /* rightshift */ |
| 105 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 106 | 26, /* bitsize */ |
| 107 | FALSE, /* pc_relative */ |
| 108 | 0, /* bitpos */ |
| 109 | complain_overflow_dont,/* complain_on_overflow */ |
| 110 | /* This needs complex overflow detection, because the upper four |
| 111 | bits must match the PC + 4. */ |
| 112 | bfd_elf_generic_reloc, /* special_function */ |
| 113 | "R_DLX_RELOC_26", /* name */ |
| 114 | TRUE, /* partial_inplace */ |
| 115 | 0x3ffffff, /* src_mask */ |
| 116 | 0x3ffffff, /* dst_mask */ |
| 117 | FALSE), /* pcrel_offset */ |
| 118 | #endif |
| 119 | |
| 120 | /* 32 bit relocation. */ |
| 121 | HOWTO (R_DLX_RELOC_32, /* type */ |
| 122 | 0, /* rightshift */ |
| 123 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 124 | 32, /* bitsize */ |
| 125 | FALSE, /* pc_relative */ |
| 126 | 0, /* bitpos */ |
| 127 | complain_overflow_dont,/* complain_on_overflow */ |
| 128 | bfd_elf_generic_reloc, /* special_function */ |
| 129 | "R_DLX_RELOC_32", /* name */ |
| 130 | TRUE, /* partial_inplace */ |
| 131 | 0xffffffff, /* src_mask */ |
| 132 | 0xffffffff, /* dst_mask */ |
| 133 | FALSE), /* pcrel_offset */ |
| 134 | |
| 135 | /* GNU extension to record C++ vtable hierarchy */ |
| 136 | HOWTO (R_DLX_GNU_VTINHERIT, /* type */ |
| 137 | 0, /* rightshift */ |
| 138 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 139 | 0, /* bitsize */ |
| 140 | FALSE, /* pc_relative */ |
| 141 | 0, /* bitpos */ |
| 142 | complain_overflow_dont,/* complain_on_overflow */ |
| 143 | NULL, /* special_function */ |
| 144 | "R_DLX_GNU_VTINHERIT", /* name */ |
| 145 | FALSE, /* partial_inplace */ |
| 146 | 0, /* src_mask */ |
| 147 | 0, /* dst_mask */ |
| 148 | FALSE), /* pcrel_offset */ |
| 149 | |
| 150 | /* GNU extension to record C++ vtable member usage */ |
| 151 | HOWTO (R_DLX_GNU_VTENTRY, /* type */ |
| 152 | 0, /* rightshift */ |
| 153 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 154 | 0, /* bitsize */ |
| 155 | FALSE, /* pc_relative */ |
| 156 | 0, /* bitpos */ |
| 157 | complain_overflow_dont,/* complain_on_overflow */ |
| 158 | _bfd_elf_rel_vtable_reloc_fn,/* special_function */ |
| 159 | "R_DLX_GNU_VTENTRY", /* name */ |
| 160 | FALSE, /* partial_inplace */ |
| 161 | 0, /* src_mask */ |
| 162 | 0, /* dst_mask */ |
| 163 | FALSE) /* pcrel_offset */ |
| 164 | }; |
| 165 | |
| 166 | /* 16 bit offset for pc-relative branches. */ |
| 167 | static reloc_howto_type elf_dlx_gnu_rel16_s2 = |
| 168 | HOWTO (R_DLX_RELOC_16_PCREL, /* type */ |
| 169 | 0, /* rightshift */ |
| 170 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 171 | 16, /* bitsize */ |
| 172 | TRUE, /* pc_relative */ |
| 173 | 0, /* bitpos */ |
| 174 | complain_overflow_signed, /* complain_on_overflow */ |
| 175 | elf32_dlx_relocate16, /* special_function */ |
| 176 | "R_DLX_RELOC_16_PCREL",/* name */ |
| 177 | TRUE, /* partial_inplace */ |
| 178 | 0xffff, /* src_mask */ |
| 179 | 0xffff, /* dst_mask */ |
| 180 | TRUE); /* pcrel_offset */ |
| 181 | |
| 182 | /* 26 bit offset for pc-relative branches. */ |
| 183 | static reloc_howto_type elf_dlx_gnu_rel26_s2 = |
| 184 | HOWTO (R_DLX_RELOC_26_PCREL, /* type */ |
| 185 | 0, /* rightshift */ |
| 186 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 187 | 26, /* bitsize */ |
| 188 | TRUE, /* pc_relative */ |
| 189 | 0, /* bitpos */ |
| 190 | complain_overflow_dont,/* complain_on_overflow */ |
| 191 | elf32_dlx_relocate26, /* special_function */ |
| 192 | "R_DLX_RELOC_26_PCREL",/* name */ |
| 193 | TRUE, /* partial_inplace */ |
| 194 | 0xffff, /* src_mask */ |
| 195 | 0xffff, /* dst_mask */ |
| 196 | TRUE); /* pcrel_offset */ |
| 197 | |
| 198 | /* High 16 bits of symbol value. */ |
| 199 | static reloc_howto_type elf_dlx_reloc_16_hi = |
| 200 | HOWTO (R_DLX_RELOC_16_HI, /* type */ |
| 201 | 16, /* rightshift */ |
| 202 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 203 | 32, /* bitsize */ |
| 204 | FALSE, /* pc_relative */ |
| 205 | 0, /* bitpos */ |
| 206 | complain_overflow_dont, /* complain_on_overflow */ |
| 207 | _bfd_dlx_elf_hi16_reloc,/* special_function */ |
| 208 | "R_DLX_RELOC_16_HI", /* name */ |
| 209 | TRUE, /* partial_inplace */ |
| 210 | 0xFFFF, /* src_mask */ |
| 211 | 0xffff, /* dst_mask */ |
| 212 | FALSE); /* pcrel_offset */ |
| 213 | |
| 214 | /* Low 16 bits of symbol value. */ |
| 215 | static reloc_howto_type elf_dlx_reloc_16_lo = |
| 216 | HOWTO (R_DLX_RELOC_16_LO, /* type */ |
| 217 | 0, /* rightshift */ |
| 218 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 219 | 16, /* bitsize */ |
| 220 | FALSE, /* pc_relative */ |
| 221 | 0, /* bitpos */ |
| 222 | complain_overflow_dont,/* complain_on_overflow */ |
| 223 | bfd_elf_generic_reloc, /* special_function */ |
| 224 | "R_DLX_RELOC_16_LO", /* name */ |
| 225 | TRUE, /* partial_inplace */ |
| 226 | 0xffff, /* src_mask */ |
| 227 | 0xffff, /* dst_mask */ |
| 228 | FALSE); /* pcrel_offset */ |
| 229 | |
| 230 | |
| 231 | /* The gas default behavior is not to preform the %hi modifier so that the |
| 232 | GNU assembler can have the lower 16 bits offset placed in the insn, BUT |
| 233 | we do like the gas to indicate it is %hi reloc type so when we in the link |
| 234 | loader phase we can have the corrected hi16 vale replace the buggous lo16 |
| 235 | value that was placed there by gas. */ |
| 236 | |
| 237 | static int skip_dlx_elf_hi16_reloc = 0; |
| 238 | |
| 239 | int |
| 240 | set_dlx_skip_hi16_flag (flag) |
| 241 | int flag; |
| 242 | { |
| 243 | skip_dlx_elf_hi16_reloc = flag; |
| 244 | return flag; |
| 245 | } |
| 246 | |
| 247 | static bfd_reloc_status_type |
| 248 | _bfd_dlx_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| 249 | input_section, output_bfd, error_message) |
| 250 | bfd *abfd; |
| 251 | arelent *reloc_entry; |
| 252 | asymbol *symbol; |
| 253 | PTR data; |
| 254 | asection *input_section; |
| 255 | bfd *output_bfd; |
| 256 | char **error_message; |
| 257 | { |
| 258 | bfd_reloc_status_type ret; |
| 259 | bfd_vma relocation; |
| 260 | |
| 261 | /* If the skip flag is set then we simply do the generic relocating, this |
| 262 | is more of a hack for dlx gas/gld, so we do not need to do the %hi/%lo |
| 263 | fixup like mips gld did. */ |
| 264 | #if 0 |
| 265 | printf ("DEBUG: skip_dlx_elf_hi16_reloc = 0x%08x\n", skip_dlx_elf_hi16_reloc); |
| 266 | #endif |
| 267 | if (skip_dlx_elf_hi16_reloc) |
| 268 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 269 | input_section, output_bfd, error_message); |
| 270 | |
| 271 | /* If we're relocating, and this an external symbol, we don't want |
| 272 | to change anything. */ |
| 273 | if (output_bfd != (bfd *) NULL |
| 274 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 275 | && reloc_entry->addend == 0) |
| 276 | { |
| 277 | reloc_entry->address += input_section->output_offset; |
| 278 | return bfd_reloc_ok; |
| 279 | } |
| 280 | |
| 281 | ret = bfd_reloc_ok; |
| 282 | |
| 283 | if (bfd_is_und_section (symbol->section) |
| 284 | && output_bfd == (bfd *) NULL) |
| 285 | ret = bfd_reloc_undefined; |
| 286 | |
| 287 | #if 0 |
| 288 | { |
| 289 | unsigned long vallo, val; |
| 290 | |
| 291 | vallo = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 292 | printf ("DEBUG: The relocation address = 0x%08x\n", reloc_entry->address); |
| 293 | printf ("DEBUG: The symbol = 0x%08x\n", vallo); |
| 294 | printf ("DEBUG: The symbol name = %s\n", bfd_asymbol_name (symbol)); |
| 295 | printf ("DEBUG: The symbol->value = 0x%08x\n", symbol->value); |
| 296 | printf ("DEBUG: The vma = 0x%08x\n", symbol->section->output_section->vma); |
| 297 | printf ("DEBUG: The output_offset = 0x%08x\n", symbol->section->output_offset); |
| 298 | printf ("DEBUG: The input_offset = 0x%08x\n", input_section->output_offset); |
| 299 | printf ("DEBUG: The input_vma = 0x%08x\n", input_section->vma); |
| 300 | printf ("DEBUG: The addend = 0x%08x\n", reloc_entry->addend); |
| 301 | } |
| 302 | #endif |
| 303 | |
| 304 | relocation = (bfd_is_com_section (symbol->section)) ? 0 : symbol->value; |
| 305 | relocation += symbol->section->output_section->vma; |
| 306 | relocation += symbol->section->output_offset; |
| 307 | relocation += reloc_entry->addend; |
| 308 | relocation += bfd_get_16 (abfd, (bfd_byte *)data + reloc_entry->address); |
| 309 | |
| 310 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 311 | return bfd_reloc_outofrange; |
| 312 | |
| 313 | #if 0 |
| 314 | printf ("DEBUG: The finial relocation value = 0x%08x\n", relocation); |
| 315 | #endif |
| 316 | |
| 317 | bfd_put_16 (abfd, (short)((relocation >> 16) & 0xFFFF), |
| 318 | (bfd_byte *)data + reloc_entry->address); |
| 319 | |
| 320 | return ret; |
| 321 | } |
| 322 | |
| 323 | /* ELF relocs are against symbols. If we are producing relocatable |
| 324 | output, and the reloc is against an external symbol, and nothing |
| 325 | has given us any additional addend, the resulting reloc will also |
| 326 | be against the same symbol. In such a case, we don't want to |
| 327 | change anything about the way the reloc is handled, since it will |
| 328 | all be done at final link time. Rather than put special case code |
| 329 | into bfd_perform_relocation, all the reloc types use this howto |
| 330 | function. It just short circuits the reloc if producing |
| 331 | relocatable output against an external symbol. */ |
| 332 | |
| 333 | static bfd_reloc_status_type |
| 334 | elf32_dlx_relocate16 (abfd, reloc_entry, symbol, data, |
| 335 | input_section, output_bfd, error_message) |
| 336 | bfd *abfd; |
| 337 | arelent *reloc_entry; |
| 338 | asymbol *symbol; |
| 339 | PTR data; |
| 340 | asection *input_section; |
| 341 | bfd *output_bfd; |
| 342 | char **error_message ATTRIBUTE_UNUSED; |
| 343 | { |
| 344 | unsigned long insn, vallo, allignment; |
| 345 | int val; |
| 346 | |
| 347 | /* HACK: I think this first condition is necessary when producing |
| 348 | relocatable output. After the end of HACK, the code is identical |
| 349 | to bfd_elf_generic_reloc(). I would _guess_ the first change |
| 350 | belongs there rather than here. martindo 1998-10-23. */ |
| 351 | |
| 352 | if (skip_dlx_elf_hi16_reloc) |
| 353 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 354 | input_section, output_bfd, error_message); |
| 355 | |
| 356 | /* Check undefined section and undefined symbols */ |
| 357 | if (bfd_is_und_section (symbol->section) |
| 358 | && output_bfd == (bfd *) NULL) |
| 359 | return bfd_reloc_undefined; |
| 360 | |
| 361 | /* Can not support a long jump to sections other then .text */ |
| 362 | if (strcmp (input_section->name, symbol->section->output_section->name) != 0) |
| 363 | { |
| 364 | fprintf (stderr, |
| 365 | "BFD Link Error: branch (PC rel16) to section (%s) not supported\n", |
| 366 | symbol->section->output_section->name); |
| 367 | return bfd_reloc_undefined; |
| 368 | } |
| 369 | |
| 370 | insn = bfd_get_32 (abfd, (bfd_byte *)data + reloc_entry->address); |
| 371 | allignment = 1 << (input_section->output_section->alignment_power - 1); |
| 372 | vallo = insn & 0x0000FFFF; |
| 373 | |
| 374 | if (vallo & 0x8000) |
| 375 | vallo = ~(vallo | 0xFFFF0000) + 1; |
| 376 | |
| 377 | /* vallo points to the vma of next instruction. */ |
| 378 | vallo += (((unsigned long)(input_section->output_section->vma + |
| 379 | input_section->output_offset) + |
| 380 | allignment) & ~allignment); |
| 381 | |
| 382 | /* val is the displacement (PC relative to next instruction). */ |
| 383 | val = (symbol->section->output_offset + |
| 384 | symbol->section->output_section->vma + |
| 385 | symbol->value) - vallo; |
| 386 | #if 0 |
| 387 | printf ("DEBUG elf32_dlx_relocate: We are here\n"); |
| 388 | printf ("DEBUG: The insn = 0x%08x\n", insn); |
| 389 | printf ("DEBUG: The vallo = 0x%08x\n", vallo); |
| 390 | printf ("DEBUG: The val = 0x%08x\n", val); |
| 391 | printf ("DEBUG: The symbol name = %s\n", bfd_asymbol_name (symbol)); |
| 392 | printf ("DEBUG: The symbol->value = 0x%08x\n", symbol->value); |
| 393 | printf ("DEBUG: The vma = 0x%08x\n", symbol->section->output_section->vma); |
| 394 | printf ("DEBUG: The lma = 0x%08x\n", symbol->section->output_section->lma); |
| 395 | printf ("DEBUG: The alignment_power = 0x%08x\n", symbol->section->output_section->alignment_power); |
| 396 | printf ("DEBUG: The output_offset = 0x%08x\n", symbol->section->output_offset); |
| 397 | printf ("DEBUG: The addend = 0x%08x\n", reloc_entry->addend); |
| 398 | #endif |
| 399 | |
| 400 | if (abs ((int) val) > 0x00007FFF) |
| 401 | return bfd_reloc_outofrange; |
| 402 | |
| 403 | insn = (insn & 0xFFFF0000) | (val & 0x0000FFFF); |
| 404 | |
| 405 | bfd_put_32 (abfd, insn, |
| 406 | (bfd_byte *) data + reloc_entry->address); |
| 407 | |
| 408 | return bfd_reloc_ok; |
| 409 | } |
| 410 | |
| 411 | static bfd_reloc_status_type |
| 412 | elf32_dlx_relocate26 (abfd, reloc_entry, symbol, data, |
| 413 | input_section, output_bfd, error_message) |
| 414 | bfd *abfd; |
| 415 | arelent *reloc_entry; |
| 416 | asymbol *symbol; |
| 417 | PTR data; |
| 418 | asection *input_section; |
| 419 | bfd *output_bfd; |
| 420 | char **error_message ATTRIBUTE_UNUSED; |
| 421 | { |
| 422 | unsigned long insn, vallo, allignment; |
| 423 | int val; |
| 424 | |
| 425 | /* HACK: I think this first condition is necessary when producing |
| 426 | relocatable output. After the end of HACK, the code is identical |
| 427 | to bfd_elf_generic_reloc(). I would _guess_ the first change |
| 428 | belongs there rather than here. martindo 1998-10-23. */ |
| 429 | |
| 430 | if (skip_dlx_elf_hi16_reloc) |
| 431 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 432 | input_section, output_bfd, error_message); |
| 433 | |
| 434 | /* Check undefined section and undefined symbols. */ |
| 435 | if (bfd_is_und_section (symbol->section) |
| 436 | && output_bfd == (bfd *) NULL) |
| 437 | return bfd_reloc_undefined; |
| 438 | |
| 439 | /* Can not support a long jump to sections other then .text */ |
| 440 | if (strcmp (input_section->name, symbol->section->output_section->name) != 0) |
| 441 | { |
| 442 | fprintf (stderr, |
| 443 | "BFD Link Error: jump (PC rel26) to section (%s) not supported\n", |
| 444 | symbol->section->output_section->name); |
| 445 | return bfd_reloc_undefined; |
| 446 | } |
| 447 | |
| 448 | insn = bfd_get_32 (abfd, (bfd_byte *)data + reloc_entry->address); |
| 449 | allignment = 1 << (input_section->output_section->alignment_power - 1); |
| 450 | vallo = insn & 0x03FFFFFF; |
| 451 | |
| 452 | if (vallo & 0x03000000) |
| 453 | vallo = ~(vallo | 0xFC000000) + 1; |
| 454 | |
| 455 | /* vallo is the vma for the next instruction. */ |
| 456 | vallo += (((unsigned long) (input_section->output_section->vma + |
| 457 | input_section->output_offset) + |
| 458 | allignment) & ~allignment); |
| 459 | |
| 460 | /* val is the displacement (PC relative to next instruction). */ |
| 461 | val = (symbol->section->output_offset + |
| 462 | symbol->section->output_section->vma + symbol->value) |
| 463 | - vallo; |
| 464 | #if 0 |
| 465 | printf ("DEBUG elf32_dlx_relocate26: We are here\n"); |
| 466 | printf ("DEBUG: The insn = 0x%08x\n", insn); |
| 467 | printf ("DEBUG: The vallo = 0x%08x\n", vallo); |
| 468 | printf ("DEBUG: The val = 0x%08x\n", val); |
| 469 | printf ("DEBUG: The abs(val) = 0x%08x\n", abs (val)); |
| 470 | printf ("DEBUG: The symbol name = %s\n", bfd_asymbol_name (symbol)); |
| 471 | printf ("DEBUG: The symbol->value = 0x%08x\n", symbol->value); |
| 472 | printf ("DEBUG: The vma = 0x%08x\n", symbol->section->output_section->vma); |
| 473 | printf ("DEBUG: The output_offset = 0x%08x\n", symbol->section->output_offset); |
| 474 | printf ("DEBUG: The input_vma = 0x%08x\n", input_section->output_section->vma); |
| 475 | printf ("DEBUG: The input_offset = 0x%08x\n", input_section->output_offset); |
| 476 | printf ("DEBUG: The input_name = %s\n", input_section->name); |
| 477 | printf ("DEBUG: The addend = 0x%08x\n", reloc_entry->addend); |
| 478 | #endif |
| 479 | |
| 480 | if (abs ((int) val) > 0x01FFFFFF) |
| 481 | return bfd_reloc_outofrange; |
| 482 | |
| 483 | insn = (insn & 0xFC000000) | (val & 0x03FFFFFF); |
| 484 | bfd_put_32 (abfd, insn, |
| 485 | (bfd_byte *) data + reloc_entry->address); |
| 486 | |
| 487 | return bfd_reloc_ok; |
| 488 | } |
| 489 | |
| 490 | /* A mapping from BFD reloc types to DLX ELF reloc types. |
| 491 | Stolen from elf32-mips.c. |
| 492 | |
| 493 | More about this table - for dlx elf relocation we do not really |
| 494 | need this table, if we have a rtype defined in this table will |
| 495 | caused tc_gen_relocate confused and die on us, but if we remove |
| 496 | this table it will caused more problem, so for now simple solution |
| 497 | is to remove those entries which may cause problem. */ |
| 498 | struct elf_reloc_map |
| 499 | { |
| 500 | bfd_reloc_code_real_type bfd_reloc_val; |
| 501 | enum elf_dlx_reloc_type elf_reloc_val; |
| 502 | }; |
| 503 | |
| 504 | static const struct elf_reloc_map dlx_reloc_map[] = |
| 505 | { |
| 506 | { BFD_RELOC_NONE, R_DLX_NONE }, |
| 507 | { BFD_RELOC_16, R_DLX_RELOC_16 }, |
| 508 | #if 0 |
| 509 | { BFD_RELOC_DLX_JMP26, R_DLX_RELOC_26_PCREL }, |
| 510 | #endif |
| 511 | { BFD_RELOC_32, R_DLX_RELOC_32 }, |
| 512 | { BFD_RELOC_DLX_HI16_S, R_DLX_RELOC_16_HI }, |
| 513 | { BFD_RELOC_DLX_LO16, R_DLX_RELOC_16_LO }, |
| 514 | { BFD_RELOC_VTABLE_INHERIT, R_DLX_GNU_VTINHERIT }, |
| 515 | { BFD_RELOC_VTABLE_ENTRY, R_DLX_GNU_VTENTRY } |
| 516 | }; |
| 517 | |
| 518 | |
| 519 | /* Look through the relocs for a section during the first phase. |
| 520 | Since we don't do .gots or .plts, we just need to consider the |
| 521 | virtual table relocs for gc. */ |
| 522 | |
| 523 | static bfd_boolean |
| 524 | elf32_dlx_check_relocs (abfd, info, sec, relocs) |
| 525 | bfd *abfd; |
| 526 | struct bfd_link_info *info; |
| 527 | asection *sec; |
| 528 | const Elf_Internal_Rela *relocs; |
| 529 | { |
| 530 | Elf_Internal_Shdr *symtab_hdr; |
| 531 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 532 | const Elf_Internal_Rela *rel; |
| 533 | const Elf_Internal_Rela *rel_end; |
| 534 | |
| 535 | if (info->relocatable) |
| 536 | return TRUE; |
| 537 | |
| 538 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 539 | sym_hashes = elf_sym_hashes (abfd); |
| 540 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 541 | if (!elf_bad_symtab (abfd)) |
| 542 | sym_hashes_end -= symtab_hdr->sh_info; |
| 543 | |
| 544 | rel_end = relocs + sec->reloc_count; |
| 545 | for (rel = relocs; rel < rel_end; rel++) |
| 546 | { |
| 547 | struct elf_link_hash_entry *h; |
| 548 | unsigned long r_symndx; |
| 549 | |
| 550 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 551 | if (r_symndx < symtab_hdr->sh_info) |
| 552 | h = NULL; |
| 553 | else |
| 554 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 555 | |
| 556 | switch (ELF32_R_TYPE (rel->r_info)) |
| 557 | { |
| 558 | /* This relocation describes the C++ object vtable hierarchy. |
| 559 | Reconstruct it for later use during GC. */ |
| 560 | case R_DLX_GNU_VTINHERIT: |
| 561 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 562 | return FALSE; |
| 563 | break; |
| 564 | |
| 565 | /* This relocation describes which C++ vtable entries are actually |
| 566 | used. Record for later use during GC. */ |
| 567 | case R_DLX_GNU_VTENTRY: |
| 568 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 569 | return FALSE; |
| 570 | break; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | return TRUE; |
| 575 | } |
| 576 | |
| 577 | /* Given a BFD reloc type, return a howto structure. */ |
| 578 | |
| 579 | static reloc_howto_type * |
| 580 | elf32_dlx_reloc_type_lookup (abfd, code) |
| 581 | bfd *abfd ATTRIBUTE_UNUSED; |
| 582 | bfd_reloc_code_real_type code; |
| 583 | { |
| 584 | unsigned int i; |
| 585 | |
| 586 | for (i = 0; i < sizeof (dlx_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 587 | if (dlx_reloc_map[i].bfd_reloc_val == code) |
| 588 | return &dlx_elf_howto_table[(int) dlx_reloc_map[i].elf_reloc_val]; |
| 589 | |
| 590 | switch (code) |
| 591 | { |
| 592 | default: |
| 593 | bfd_set_error (bfd_error_bad_value); |
| 594 | return NULL; |
| 595 | case BFD_RELOC_16_PCREL_S2: |
| 596 | return &elf_dlx_gnu_rel16_s2; |
| 597 | case BFD_RELOC_DLX_JMP26: |
| 598 | return &elf_dlx_gnu_rel26_s2; |
| 599 | case BFD_RELOC_HI16_S: |
| 600 | return &elf_dlx_reloc_16_hi; |
| 601 | case BFD_RELOC_LO16: |
| 602 | return &elf_dlx_reloc_16_lo; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | static reloc_howto_type * |
| 607 | dlx_rtype_to_howto (r_type) |
| 608 | unsigned int r_type; |
| 609 | { |
| 610 | switch (r_type) |
| 611 | { |
| 612 | case R_DLX_RELOC_16_PCREL: |
| 613 | return & elf_dlx_gnu_rel16_s2; |
| 614 | break; |
| 615 | case R_DLX_RELOC_26_PCREL: |
| 616 | return & elf_dlx_gnu_rel26_s2; |
| 617 | break; |
| 618 | case R_DLX_RELOC_16_HI: |
| 619 | return & elf_dlx_reloc_16_hi; |
| 620 | break; |
| 621 | case R_DLX_RELOC_16_LO: |
| 622 | return & elf_dlx_reloc_16_lo; |
| 623 | break; |
| 624 | |
| 625 | default: |
| 626 | BFD_ASSERT (r_type < (unsigned int) R_DLX_max); |
| 627 | return & dlx_elf_howto_table[r_type]; |
| 628 | break; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | static void |
| 633 | elf32_dlx_info_to_howto (abfd, cache_ptr, dst) |
| 634 | bfd * abfd ATTRIBUTE_UNUSED; |
| 635 | arelent * cache_ptr ATTRIBUTE_UNUSED; |
| 636 | Elf_Internal_Rela * dst ATTRIBUTE_UNUSED; |
| 637 | { |
| 638 | abort (); |
| 639 | } |
| 640 | |
| 641 | static void |
| 642 | elf32_dlx_info_to_howto_rel (abfd, cache_ptr, dst) |
| 643 | bfd *abfd ATTRIBUTE_UNUSED; |
| 644 | arelent *cache_ptr; |
| 645 | Elf_Internal_Rela *dst; |
| 646 | { |
| 647 | unsigned int r_type; |
| 648 | |
| 649 | r_type = ELF32_R_TYPE (dst->r_info); |
| 650 | cache_ptr->howto = dlx_rtype_to_howto (r_type); |
| 651 | return; |
| 652 | } |
| 653 | |
| 654 | #define TARGET_BIG_SYM bfd_elf32_dlx_big_vec |
| 655 | #define TARGET_BIG_NAME "elf32-dlx" |
| 656 | #define ELF_ARCH bfd_arch_dlx |
| 657 | #define ELF_MACHINE_CODE EM_DLX |
| 658 | #define ELF_MAXPAGESIZE 1 /* FIXME: This number is wrong, It should be the page size in bytes. */ |
| 659 | |
| 660 | #include "elf32-target.h" |