| 1 | /* BFD back-end for MIPS Extended-Coff files. |
| 2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
| 3 | Free Software Foundation, Inc. |
| 4 | Original version by Per Bothner. |
| 5 | Full support added by Ian Lance Taylor, ian@cygnus.com. |
| 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 2 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 Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "bfdlink.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "coff/internal.h" |
| 28 | #include "coff/sym.h" |
| 29 | #include "coff/symconst.h" |
| 30 | #include "coff/ecoff.h" |
| 31 | #include "coff/mips.h" |
| 32 | #include "libcoff.h" |
| 33 | #include "libecoff.h" |
| 34 | \f |
| 35 | /* Prototypes for static functions. */ |
| 36 | |
| 37 | static boolean mips_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr)); |
| 38 | static void mips_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, |
| 39 | struct internal_reloc *)); |
| 40 | static void mips_ecoff_swap_reloc_out PARAMS ((bfd *, |
| 41 | const struct internal_reloc *, |
| 42 | PTR)); |
| 43 | static void mips_adjust_reloc_in PARAMS ((bfd *, |
| 44 | const struct internal_reloc *, |
| 45 | arelent *)); |
| 46 | static void mips_adjust_reloc_out PARAMS ((bfd *, const arelent *, |
| 47 | struct internal_reloc *)); |
| 48 | static bfd_reloc_status_type mips_generic_reloc PARAMS ((bfd *abfd, |
| 49 | arelent *reloc, |
| 50 | asymbol *symbol, |
| 51 | PTR data, |
| 52 | asection *section, |
| 53 | bfd *output_bfd, |
| 54 | char **error)); |
| 55 | static bfd_reloc_status_type mips_refhi_reloc PARAMS ((bfd *abfd, |
| 56 | arelent *reloc, |
| 57 | asymbol *symbol, |
| 58 | PTR data, |
| 59 | asection *section, |
| 60 | bfd *output_bfd, |
| 61 | char **error)); |
| 62 | static bfd_reloc_status_type mips_reflo_reloc PARAMS ((bfd *abfd, |
| 63 | arelent *reloc, |
| 64 | asymbol *symbol, |
| 65 | PTR data, |
| 66 | asection *section, |
| 67 | bfd *output_bfd, |
| 68 | char **error)); |
| 69 | static bfd_reloc_status_type mips_gprel_reloc PARAMS ((bfd *abfd, |
| 70 | arelent *reloc, |
| 71 | asymbol *symbol, |
| 72 | PTR data, |
| 73 | asection *section, |
| 74 | bfd *output_bfd, |
| 75 | char **error)); |
| 76 | static bfd_reloc_status_type mips_relhi_reloc PARAMS ((bfd *abfd, |
| 77 | arelent *reloc, |
| 78 | asymbol *symbol, |
| 79 | PTR data, |
| 80 | asection *section, |
| 81 | bfd *output_bfd, |
| 82 | char **error)); |
| 83 | static bfd_reloc_status_type mips_rello_reloc PARAMS ((bfd *abfd, |
| 84 | arelent *reloc, |
| 85 | asymbol *symbol, |
| 86 | PTR data, |
| 87 | asection *section, |
| 88 | bfd *output_bfd, |
| 89 | char **error)); |
| 90 | static bfd_reloc_status_type mips_switch_reloc PARAMS ((bfd *abfd, |
| 91 | arelent *reloc, |
| 92 | asymbol *symbol, |
| 93 | PTR data, |
| 94 | asection *section, |
| 95 | bfd *output_bfd, |
| 96 | char **error)); |
| 97 | static void mips_relocate_hi PARAMS ((struct internal_reloc *refhi, |
| 98 | struct internal_reloc *reflo, |
| 99 | bfd *input_bfd, |
| 100 | asection *input_section, |
| 101 | bfd_byte *contents, |
| 102 | size_t adjust, |
| 103 | bfd_vma relocation, |
| 104 | boolean pcrel)); |
| 105 | static boolean mips_relocate_section PARAMS ((bfd *, struct bfd_link_info *, |
| 106 | bfd *, asection *, |
| 107 | bfd_byte *, PTR)); |
| 108 | static boolean mips_read_relocs PARAMS ((bfd *, asection *)); |
| 109 | static boolean mips_relax_section PARAMS ((bfd *, asection *, |
| 110 | struct bfd_link_info *, |
| 111 | boolean *)); |
| 112 | static boolean mips_relax_pcrel16 PARAMS ((struct bfd_link_info *, bfd *, |
| 113 | asection *, |
| 114 | struct ecoff_link_hash_entry *, |
| 115 | bfd_byte *, bfd_vma)); |
| 116 | static reloc_howto_type *mips_bfd_reloc_type_lookup |
| 117 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 118 | |
| 119 | \f |
| 120 | /* ECOFF has COFF sections, but the debugging information is stored in |
| 121 | a completely different format. ECOFF targets use some of the |
| 122 | swapping routines from coffswap.h, and some of the generic COFF |
| 123 | routines in coffgen.c, but, unlike the real COFF targets, do not |
| 124 | use coffcode.h itself. |
| 125 | |
| 126 | Get the generic COFF swapping routines, except for the reloc, |
| 127 | symbol, and lineno ones. Give them ECOFF names. */ |
| 128 | #define MIPSECOFF |
| 129 | #define NO_COFF_RELOCS |
| 130 | #define NO_COFF_SYMBOLS |
| 131 | #define NO_COFF_LINENOS |
| 132 | #define coff_swap_filehdr_in mips_ecoff_swap_filehdr_in |
| 133 | #define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out |
| 134 | #define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in |
| 135 | #define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out |
| 136 | #define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in |
| 137 | #define coff_swap_scnhdr_out mips_ecoff_swap_scnhdr_out |
| 138 | #include "coffswap.h" |
| 139 | |
| 140 | /* Get the ECOFF swapping routines. */ |
| 141 | #define ECOFF_32 |
| 142 | #include "ecoffswap.h" |
| 143 | \f |
| 144 | /* How to process the various relocs types. */ |
| 145 | |
| 146 | static reloc_howto_type mips_howto_table[] = |
| 147 | { |
| 148 | /* Reloc type 0 is ignored. The reloc reading code ensures that |
| 149 | this is a reference to the .abs section, which will cause |
| 150 | bfd_perform_relocation to do nothing. */ |
| 151 | HOWTO (MIPS_R_IGNORE, /* type */ |
| 152 | 0, /* rightshift */ |
| 153 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 154 | 8, /* bitsize */ |
| 155 | false, /* pc_relative */ |
| 156 | 0, /* bitpos */ |
| 157 | complain_overflow_dont, /* complain_on_overflow */ |
| 158 | 0, /* special_function */ |
| 159 | "IGNORE", /* name */ |
| 160 | false, /* partial_inplace */ |
| 161 | 0, /* src_mask */ |
| 162 | 0, /* dst_mask */ |
| 163 | false), /* pcrel_offset */ |
| 164 | |
| 165 | /* A 16 bit reference to a symbol, normally from a data section. */ |
| 166 | HOWTO (MIPS_R_REFHALF, /* type */ |
| 167 | 0, /* rightshift */ |
| 168 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 169 | 16, /* bitsize */ |
| 170 | false, /* pc_relative */ |
| 171 | 0, /* bitpos */ |
| 172 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 173 | mips_generic_reloc, /* special_function */ |
| 174 | "REFHALF", /* name */ |
| 175 | true, /* partial_inplace */ |
| 176 | 0xffff, /* src_mask */ |
| 177 | 0xffff, /* dst_mask */ |
| 178 | false), /* pcrel_offset */ |
| 179 | |
| 180 | /* A 32 bit reference to a symbol, normally from a data section. */ |
| 181 | HOWTO (MIPS_R_REFWORD, /* type */ |
| 182 | 0, /* rightshift */ |
| 183 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 184 | 32, /* bitsize */ |
| 185 | false, /* pc_relative */ |
| 186 | 0, /* bitpos */ |
| 187 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 188 | mips_generic_reloc, /* special_function */ |
| 189 | "REFWORD", /* name */ |
| 190 | true, /* partial_inplace */ |
| 191 | 0xffffffff, /* src_mask */ |
| 192 | 0xffffffff, /* dst_mask */ |
| 193 | false), /* pcrel_offset */ |
| 194 | |
| 195 | /* A 26 bit absolute jump address. */ |
| 196 | HOWTO (MIPS_R_JMPADDR, /* type */ |
| 197 | 2, /* rightshift */ |
| 198 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 199 | 26, /* bitsize */ |
| 200 | false, /* pc_relative */ |
| 201 | 0, /* bitpos */ |
| 202 | complain_overflow_dont, /* complain_on_overflow */ |
| 203 | /* This needs complex overflow |
| 204 | detection, because the upper four |
| 205 | bits must match the PC. */ |
| 206 | mips_generic_reloc, /* special_function */ |
| 207 | "JMPADDR", /* name */ |
| 208 | true, /* partial_inplace */ |
| 209 | 0x3ffffff, /* src_mask */ |
| 210 | 0x3ffffff, /* dst_mask */ |
| 211 | false), /* pcrel_offset */ |
| 212 | |
| 213 | /* The high 16 bits of a symbol value. Handled by the function |
| 214 | mips_refhi_reloc. */ |
| 215 | HOWTO (MIPS_R_REFHI, /* type */ |
| 216 | 16, /* rightshift */ |
| 217 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 218 | 16, /* bitsize */ |
| 219 | false, /* pc_relative */ |
| 220 | 0, /* bitpos */ |
| 221 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 222 | mips_refhi_reloc, /* special_function */ |
| 223 | "REFHI", /* name */ |
| 224 | true, /* partial_inplace */ |
| 225 | 0xffff, /* src_mask */ |
| 226 | 0xffff, /* dst_mask */ |
| 227 | false), /* pcrel_offset */ |
| 228 | |
| 229 | /* The low 16 bits of a symbol value. */ |
| 230 | HOWTO (MIPS_R_REFLO, /* type */ |
| 231 | 0, /* rightshift */ |
| 232 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 233 | 16, /* bitsize */ |
| 234 | false, /* pc_relative */ |
| 235 | 0, /* bitpos */ |
| 236 | complain_overflow_dont, /* complain_on_overflow */ |
| 237 | mips_reflo_reloc, /* special_function */ |
| 238 | "REFLO", /* name */ |
| 239 | true, /* partial_inplace */ |
| 240 | 0xffff, /* src_mask */ |
| 241 | 0xffff, /* dst_mask */ |
| 242 | false), /* pcrel_offset */ |
| 243 | |
| 244 | /* A reference to an offset from the gp register. Handled by the |
| 245 | function mips_gprel_reloc. */ |
| 246 | HOWTO (MIPS_R_GPREL, /* type */ |
| 247 | 0, /* rightshift */ |
| 248 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 249 | 16, /* bitsize */ |
| 250 | false, /* pc_relative */ |
| 251 | 0, /* bitpos */ |
| 252 | complain_overflow_signed, /* complain_on_overflow */ |
| 253 | mips_gprel_reloc, /* special_function */ |
| 254 | "GPREL", /* name */ |
| 255 | true, /* partial_inplace */ |
| 256 | 0xffff, /* src_mask */ |
| 257 | 0xffff, /* dst_mask */ |
| 258 | false), /* pcrel_offset */ |
| 259 | |
| 260 | /* A reference to a literal using an offset from the gp register. |
| 261 | Handled by the function mips_gprel_reloc. */ |
| 262 | HOWTO (MIPS_R_LITERAL, /* type */ |
| 263 | 0, /* rightshift */ |
| 264 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 265 | 16, /* bitsize */ |
| 266 | false, /* pc_relative */ |
| 267 | 0, /* bitpos */ |
| 268 | complain_overflow_signed, /* complain_on_overflow */ |
| 269 | mips_gprel_reloc, /* special_function */ |
| 270 | "LITERAL", /* name */ |
| 271 | true, /* partial_inplace */ |
| 272 | 0xffff, /* src_mask */ |
| 273 | 0xffff, /* dst_mask */ |
| 274 | false), /* pcrel_offset */ |
| 275 | |
| 276 | EMPTY_HOWTO (8), |
| 277 | EMPTY_HOWTO (9), |
| 278 | EMPTY_HOWTO (10), |
| 279 | EMPTY_HOWTO (11), |
| 280 | |
| 281 | /* This reloc is a Cygnus extension used when generating position |
| 282 | independent code for embedded systems. It represents a 16 bit PC |
| 283 | relative reloc rightshifted twice as used in the MIPS branch |
| 284 | instructions. */ |
| 285 | HOWTO (MIPS_R_PCREL16, /* type */ |
| 286 | 2, /* rightshift */ |
| 287 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 288 | 16, /* bitsize */ |
| 289 | true, /* pc_relative */ |
| 290 | 0, /* bitpos */ |
| 291 | complain_overflow_signed, /* complain_on_overflow */ |
| 292 | mips_generic_reloc, /* special_function */ |
| 293 | "PCREL16", /* name */ |
| 294 | true, /* partial_inplace */ |
| 295 | 0xffff, /* src_mask */ |
| 296 | 0xffff, /* dst_mask */ |
| 297 | true), /* pcrel_offset */ |
| 298 | |
| 299 | /* This reloc is a Cygnus extension used when generating position |
| 300 | independent code for embedded systems. It represents the high 16 |
| 301 | bits of a PC relative reloc. The next reloc must be |
| 302 | MIPS_R_RELLO, and the addend is formed from the addends of the |
| 303 | two instructions, just as in MIPS_R_REFHI and MIPS_R_REFLO. The |
| 304 | final value is actually PC relative to the location of the |
| 305 | MIPS_R_RELLO reloc, not the MIPS_R_RELHI reloc. */ |
| 306 | HOWTO (MIPS_R_RELHI, /* type */ |
| 307 | 16, /* rightshift */ |
| 308 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 309 | 16, /* bitsize */ |
| 310 | true, /* pc_relative */ |
| 311 | 0, /* bitpos */ |
| 312 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 313 | mips_relhi_reloc, /* special_function */ |
| 314 | "RELHI", /* name */ |
| 315 | true, /* partial_inplace */ |
| 316 | 0xffff, /* src_mask */ |
| 317 | 0xffff, /* dst_mask */ |
| 318 | true), /* pcrel_offset */ |
| 319 | |
| 320 | /* This reloc is a Cygnus extension used when generating position |
| 321 | independent code for embedded systems. It represents the low 16 |
| 322 | bits of a PC relative reloc. */ |
| 323 | HOWTO (MIPS_R_RELLO, /* type */ |
| 324 | 0, /* rightshift */ |
| 325 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 326 | 16, /* bitsize */ |
| 327 | true, /* pc_relative */ |
| 328 | 0, /* bitpos */ |
| 329 | complain_overflow_dont, /* complain_on_overflow */ |
| 330 | mips_rello_reloc, /* special_function */ |
| 331 | "RELLO", /* name */ |
| 332 | true, /* partial_inplace */ |
| 333 | 0xffff, /* src_mask */ |
| 334 | 0xffff, /* dst_mask */ |
| 335 | true), /* pcrel_offset */ |
| 336 | |
| 337 | EMPTY_HOWTO (15), |
| 338 | EMPTY_HOWTO (16), |
| 339 | EMPTY_HOWTO (17), |
| 340 | EMPTY_HOWTO (18), |
| 341 | EMPTY_HOWTO (19), |
| 342 | EMPTY_HOWTO (20), |
| 343 | EMPTY_HOWTO (21), |
| 344 | |
| 345 | /* This reloc is a Cygnus extension used when generating position |
| 346 | independent code for embedded systems. It represents an entry in |
| 347 | a switch table, which is the difference between two symbols in |
| 348 | the .text section. The symndx is actually the offset from the |
| 349 | reloc address to the subtrahend. See include/coff/mips.h for |
| 350 | more details. */ |
| 351 | HOWTO (MIPS_R_SWITCH, /* type */ |
| 352 | 0, /* rightshift */ |
| 353 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 354 | 32, /* bitsize */ |
| 355 | true, /* pc_relative */ |
| 356 | 0, /* bitpos */ |
| 357 | complain_overflow_dont, /* complain_on_overflow */ |
| 358 | mips_switch_reloc, /* special_function */ |
| 359 | "SWITCH", /* name */ |
| 360 | true, /* partial_inplace */ |
| 361 | 0xffffffff, /* src_mask */ |
| 362 | 0xffffffff, /* dst_mask */ |
| 363 | true) /* pcrel_offset */ |
| 364 | }; |
| 365 | |
| 366 | #define MIPS_HOWTO_COUNT \ |
| 367 | (sizeof mips_howto_table / sizeof mips_howto_table[0]) |
| 368 | |
| 369 | /* When the linker is doing relaxing, it may change a external PCREL16 |
| 370 | reloc. This typically represents an instruction like |
| 371 | bal foo |
| 372 | We change it to |
| 373 | .set noreorder |
| 374 | bal $L1 |
| 375 | lui $at,%hi(foo - $L1) |
| 376 | $L1: |
| 377 | addiu $at,%lo(foo - $L1) |
| 378 | addu $at,$at,$31 |
| 379 | jalr $at |
| 380 | PCREL16_EXPANSION_ADJUSTMENT is the number of bytes this changes the |
| 381 | instruction by. */ |
| 382 | |
| 383 | #define PCREL16_EXPANSION_ADJUSTMENT (4 * 4) |
| 384 | \f |
| 385 | /* See whether the magic number matches. */ |
| 386 | |
| 387 | static boolean |
| 388 | mips_ecoff_bad_format_hook (abfd, filehdr) |
| 389 | bfd *abfd; |
| 390 | PTR filehdr; |
| 391 | { |
| 392 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; |
| 393 | |
| 394 | switch (internal_f->f_magic) |
| 395 | { |
| 396 | case MIPS_MAGIC_1: |
| 397 | /* I don't know what endianness this implies. */ |
| 398 | return true; |
| 399 | |
| 400 | case MIPS_MAGIC_BIG: |
| 401 | case MIPS_MAGIC_BIG2: |
| 402 | case MIPS_MAGIC_BIG3: |
| 403 | return bfd_big_endian (abfd); |
| 404 | |
| 405 | case MIPS_MAGIC_LITTLE: |
| 406 | case MIPS_MAGIC_LITTLE2: |
| 407 | case MIPS_MAGIC_LITTLE3: |
| 408 | return bfd_little_endian (abfd); |
| 409 | |
| 410 | default: |
| 411 | return false; |
| 412 | } |
| 413 | } |
| 414 | \f |
| 415 | /* Reloc handling. MIPS ECOFF relocs are packed into 8 bytes in |
| 416 | external form. They use a bit which indicates whether the symbol |
| 417 | is external. */ |
| 418 | |
| 419 | /* Swap a reloc in. */ |
| 420 | |
| 421 | static void |
| 422 | mips_ecoff_swap_reloc_in (abfd, ext_ptr, intern) |
| 423 | bfd *abfd; |
| 424 | PTR ext_ptr; |
| 425 | struct internal_reloc *intern; |
| 426 | { |
| 427 | const RELOC *ext = (RELOC *) ext_ptr; |
| 428 | |
| 429 | intern->r_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_vaddr); |
| 430 | if (bfd_header_big_endian (abfd)) |
| 431 | { |
| 432 | intern->r_symndx = (((int) ext->r_bits[0] |
| 433 | << RELOC_BITS0_SYMNDX_SH_LEFT_BIG) |
| 434 | | ((int) ext->r_bits[1] |
| 435 | << RELOC_BITS1_SYMNDX_SH_LEFT_BIG) |
| 436 | | ((int) ext->r_bits[2] |
| 437 | << RELOC_BITS2_SYMNDX_SH_LEFT_BIG)); |
| 438 | intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG) |
| 439 | >> RELOC_BITS3_TYPE_SH_BIG); |
| 440 | intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0; |
| 441 | } |
| 442 | else |
| 443 | { |
| 444 | intern->r_symndx = (((int) ext->r_bits[0] |
| 445 | << RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE) |
| 446 | | ((int) ext->r_bits[1] |
| 447 | << RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE) |
| 448 | | ((int) ext->r_bits[2] |
| 449 | << RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE)); |
| 450 | intern->r_type = (((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE) |
| 451 | >> RELOC_BITS3_TYPE_SH_LITTLE) |
| 452 | | ((ext->r_bits[3] & RELOC_BITS3_TYPEHI_LITTLE) |
| 453 | << RELOC_BITS3_TYPEHI_SH_LITTLE)); |
| 454 | intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0; |
| 455 | } |
| 456 | |
| 457 | /* If this is a MIPS_R_SWITCH reloc, or an internal MIPS_R_RELHI or |
| 458 | MIPS_R_RELLO reloc, r_symndx is actually the offset from the |
| 459 | reloc address to the base of the difference (see |
| 460 | include/coff/mips.h for more details). We copy symndx into the |
| 461 | r_offset field so as not to confuse ecoff_slurp_reloc_table in |
| 462 | ecoff.c. In adjust_reloc_in we then copy r_offset into the reloc |
| 463 | addend. */ |
| 464 | if (intern->r_type == MIPS_R_SWITCH |
| 465 | || (! intern->r_extern |
| 466 | && (intern->r_type == MIPS_R_RELLO |
| 467 | || intern->r_type == MIPS_R_RELHI))) |
| 468 | { |
| 469 | BFD_ASSERT (! intern->r_extern); |
| 470 | intern->r_offset = intern->r_symndx; |
| 471 | if (intern->r_offset & 0x800000) |
| 472 | intern->r_offset -= 0x1000000; |
| 473 | intern->r_symndx = RELOC_SECTION_TEXT; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | /* Swap a reloc out. */ |
| 478 | |
| 479 | static void |
| 480 | mips_ecoff_swap_reloc_out (abfd, intern, dst) |
| 481 | bfd *abfd; |
| 482 | const struct internal_reloc *intern; |
| 483 | PTR dst; |
| 484 | { |
| 485 | RELOC *ext = (RELOC *) dst; |
| 486 | long r_symndx; |
| 487 | |
| 488 | BFD_ASSERT (intern->r_extern |
| 489 | || (intern->r_symndx >= 0 && intern->r_symndx <= 12)); |
| 490 | |
| 491 | /* If this is a MIPS_R_SWITCH reloc, or an internal MIPS_R_RELLO or |
| 492 | MIPS_R_RELHI reloc, we actually want to write the contents of |
| 493 | r_offset out as the symbol index. This undoes the change made by |
| 494 | mips_ecoff_swap_reloc_in. */ |
| 495 | if (intern->r_type != MIPS_R_SWITCH |
| 496 | && (intern->r_extern |
| 497 | || (intern->r_type != MIPS_R_RELHI |
| 498 | && intern->r_type != MIPS_R_RELLO))) |
| 499 | r_symndx = intern->r_symndx; |
| 500 | else |
| 501 | { |
| 502 | BFD_ASSERT (intern->r_symndx == RELOC_SECTION_TEXT); |
| 503 | r_symndx = intern->r_offset & 0xffffff; |
| 504 | } |
| 505 | |
| 506 | bfd_h_put_32 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr); |
| 507 | if (bfd_header_big_endian (abfd)) |
| 508 | { |
| 509 | ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG; |
| 510 | ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG; |
| 511 | ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG; |
| 512 | ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG) |
| 513 | & RELOC_BITS3_TYPE_BIG) |
| 514 | | (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0)); |
| 515 | } |
| 516 | else |
| 517 | { |
| 518 | ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE; |
| 519 | ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE; |
| 520 | ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE; |
| 521 | ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE) |
| 522 | & RELOC_BITS3_TYPE_LITTLE) |
| 523 | | ((intern->r_type >> RELOC_BITS3_TYPEHI_SH_LITTLE |
| 524 | & RELOC_BITS3_TYPEHI_LITTLE)) |
| 525 | | (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0)); |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | /* Finish canonicalizing a reloc. Part of this is generic to all |
| 530 | ECOFF targets, and that part is in ecoff.c. The rest is done in |
| 531 | this backend routine. It must fill in the howto field. */ |
| 532 | |
| 533 | static void |
| 534 | mips_adjust_reloc_in (abfd, intern, rptr) |
| 535 | bfd *abfd; |
| 536 | const struct internal_reloc *intern; |
| 537 | arelent *rptr; |
| 538 | { |
| 539 | if (intern->r_type > MIPS_R_SWITCH) |
| 540 | abort (); |
| 541 | |
| 542 | if (! intern->r_extern |
| 543 | && (intern->r_type == MIPS_R_GPREL |
| 544 | || intern->r_type == MIPS_R_LITERAL)) |
| 545 | rptr->addend += ecoff_data (abfd)->gp; |
| 546 | |
| 547 | /* If the type is MIPS_R_IGNORE, make sure this is a reference to |
| 548 | the absolute section so that the reloc is ignored. */ |
| 549 | if (intern->r_type == MIPS_R_IGNORE) |
| 550 | rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 551 | |
| 552 | /* If this is a MIPS_R_SWITCH reloc, or an internal MIPS_R_RELHI or |
| 553 | MIPS_R_RELLO reloc, we want the addend field of the BFD relocto |
| 554 | hold the value which was originally in the symndx field of the |
| 555 | internal MIPS ECOFF reloc. This value was copied into |
| 556 | intern->r_offset by mips_swap_reloc_in, and here we copy it into |
| 557 | the addend field. */ |
| 558 | if (intern->r_type == MIPS_R_SWITCH |
| 559 | || (! intern->r_extern |
| 560 | && (intern->r_type == MIPS_R_RELHI |
| 561 | || intern->r_type == MIPS_R_RELLO))) |
| 562 | rptr->addend = intern->r_offset; |
| 563 | |
| 564 | rptr->howto = &mips_howto_table[intern->r_type]; |
| 565 | } |
| 566 | |
| 567 | /* Make any adjustments needed to a reloc before writing it out. None |
| 568 | are needed for MIPS. */ |
| 569 | |
| 570 | static void |
| 571 | mips_adjust_reloc_out (abfd, rel, intern) |
| 572 | bfd *abfd ATTRIBUTE_UNUSED; |
| 573 | const arelent *rel; |
| 574 | struct internal_reloc *intern; |
| 575 | { |
| 576 | /* For a MIPS_R_SWITCH reloc, or an internal MIPS_R_RELHI or |
| 577 | MIPS_R_RELLO reloc, we must copy rel->addend into |
| 578 | intern->r_offset. This will then be written out as the symbol |
| 579 | index by mips_ecoff_swap_reloc_out. This operation parallels the |
| 580 | action of mips_adjust_reloc_in. */ |
| 581 | if (intern->r_type == MIPS_R_SWITCH |
| 582 | || (! intern->r_extern |
| 583 | && (intern->r_type == MIPS_R_RELHI |
| 584 | || intern->r_type == MIPS_R_RELLO))) |
| 585 | intern->r_offset = rel->addend; |
| 586 | } |
| 587 | |
| 588 | /* ECOFF relocs are either against external symbols, or against |
| 589 | sections. If we are producing relocateable output, and the reloc |
| 590 | is against an external symbol, and nothing has given us any |
| 591 | additional addend, the resulting reloc will also be against the |
| 592 | same symbol. In such a case, we don't want to change anything |
| 593 | about the way the reloc is handled, since it will all be done at |
| 594 | final link time. Rather than put special case code into |
| 595 | bfd_perform_relocation, all the reloc types use this howto |
| 596 | function. It just short circuits the reloc if producing |
| 597 | relocateable output against an external symbol. */ |
| 598 | |
| 599 | static bfd_reloc_status_type |
| 600 | mips_generic_reloc (abfd, |
| 601 | reloc_entry, |
| 602 | symbol, |
| 603 | data, |
| 604 | input_section, |
| 605 | output_bfd, |
| 606 | error_message) |
| 607 | bfd *abfd ATTRIBUTE_UNUSED; |
| 608 | arelent *reloc_entry; |
| 609 | asymbol *symbol; |
| 610 | PTR data ATTRIBUTE_UNUSED; |
| 611 | asection *input_section; |
| 612 | bfd *output_bfd; |
| 613 | char **error_message ATTRIBUTE_UNUSED; |
| 614 | { |
| 615 | if (output_bfd != (bfd *) NULL |
| 616 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 617 | && reloc_entry->addend == 0) |
| 618 | { |
| 619 | reloc_entry->address += input_section->output_offset; |
| 620 | return bfd_reloc_ok; |
| 621 | } |
| 622 | |
| 623 | return bfd_reloc_continue; |
| 624 | } |
| 625 | |
| 626 | /* Do a REFHI relocation. This has to be done in combination with a |
| 627 | REFLO reloc, because there is a carry from the REFLO to the REFHI. |
| 628 | Here we just save the information we need; we do the actual |
| 629 | relocation when we see the REFLO. MIPS ECOFF requires that the |
| 630 | REFLO immediately follow the REFHI. As a GNU extension, we permit |
| 631 | an arbitrary number of HI relocs to be associated with a single LO |
| 632 | reloc. This extension permits gcc to output the HI and LO relocs |
| 633 | itself. */ |
| 634 | |
| 635 | struct mips_hi |
| 636 | { |
| 637 | struct mips_hi *next; |
| 638 | bfd_byte *addr; |
| 639 | bfd_vma addend; |
| 640 | }; |
| 641 | |
| 642 | /* FIXME: This should not be a static variable. */ |
| 643 | |
| 644 | static struct mips_hi *mips_refhi_list; |
| 645 | |
| 646 | static bfd_reloc_status_type |
| 647 | mips_refhi_reloc (abfd, |
| 648 | reloc_entry, |
| 649 | symbol, |
| 650 | data, |
| 651 | input_section, |
| 652 | output_bfd, |
| 653 | error_message) |
| 654 | bfd *abfd ATTRIBUTE_UNUSED; |
| 655 | arelent *reloc_entry; |
| 656 | asymbol *symbol; |
| 657 | PTR data; |
| 658 | asection *input_section; |
| 659 | bfd *output_bfd; |
| 660 | char **error_message ATTRIBUTE_UNUSED; |
| 661 | { |
| 662 | bfd_reloc_status_type ret; |
| 663 | bfd_vma relocation; |
| 664 | struct mips_hi *n; |
| 665 | |
| 666 | /* If we're relocating, and this an external symbol, we don't want |
| 667 | to change anything. */ |
| 668 | if (output_bfd != (bfd *) NULL |
| 669 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 670 | && reloc_entry->addend == 0) |
| 671 | { |
| 672 | reloc_entry->address += input_section->output_offset; |
| 673 | return bfd_reloc_ok; |
| 674 | } |
| 675 | |
| 676 | ret = bfd_reloc_ok; |
| 677 | if (bfd_is_und_section (symbol->section) |
| 678 | && output_bfd == (bfd *) NULL) |
| 679 | ret = bfd_reloc_undefined; |
| 680 | |
| 681 | if (bfd_is_com_section (symbol->section)) |
| 682 | relocation = 0; |
| 683 | else |
| 684 | relocation = symbol->value; |
| 685 | |
| 686 | relocation += symbol->section->output_section->vma; |
| 687 | relocation += symbol->section->output_offset; |
| 688 | relocation += reloc_entry->addend; |
| 689 | |
| 690 | if (reloc_entry->address > input_section->_cooked_size) |
| 691 | return bfd_reloc_outofrange; |
| 692 | |
| 693 | /* Save the information, and let REFLO do the actual relocation. */ |
| 694 | n = (struct mips_hi *) bfd_malloc (sizeof *n); |
| 695 | if (n == NULL) |
| 696 | return bfd_reloc_outofrange; |
| 697 | n->addr = (bfd_byte *) data + reloc_entry->address; |
| 698 | n->addend = relocation; |
| 699 | n->next = mips_refhi_list; |
| 700 | mips_refhi_list = n; |
| 701 | |
| 702 | if (output_bfd != (bfd *) NULL) |
| 703 | reloc_entry->address += input_section->output_offset; |
| 704 | |
| 705 | return ret; |
| 706 | } |
| 707 | |
| 708 | /* Do a REFLO relocation. This is a straightforward 16 bit inplace |
| 709 | relocation; this function exists in order to do the REFHI |
| 710 | relocation described above. */ |
| 711 | |
| 712 | static bfd_reloc_status_type |
| 713 | mips_reflo_reloc (abfd, |
| 714 | reloc_entry, |
| 715 | symbol, |
| 716 | data, |
| 717 | input_section, |
| 718 | output_bfd, |
| 719 | error_message) |
| 720 | bfd *abfd; |
| 721 | arelent *reloc_entry; |
| 722 | asymbol *symbol; |
| 723 | PTR data; |
| 724 | asection *input_section; |
| 725 | bfd *output_bfd; |
| 726 | char **error_message; |
| 727 | { |
| 728 | if (mips_refhi_list != NULL) |
| 729 | { |
| 730 | struct mips_hi *l; |
| 731 | |
| 732 | l = mips_refhi_list; |
| 733 | while (l != NULL) |
| 734 | { |
| 735 | unsigned long insn; |
| 736 | unsigned long val; |
| 737 | unsigned long vallo; |
| 738 | struct mips_hi *next; |
| 739 | |
| 740 | /* Do the REFHI relocation. Note that we actually don't |
| 741 | need to know anything about the REFLO itself, except |
| 742 | where to find the low 16 bits of the addend needed by the |
| 743 | REFHI. */ |
| 744 | insn = bfd_get_32 (abfd, l->addr); |
| 745 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) |
| 746 | & 0xffff); |
| 747 | val = ((insn & 0xffff) << 16) + vallo; |
| 748 | val += l->addend; |
| 749 | |
| 750 | /* The low order 16 bits are always treated as a signed |
| 751 | value. Therefore, a negative value in the low order bits |
| 752 | requires an adjustment in the high order bits. We need |
| 753 | to make this adjustment in two ways: once for the bits we |
| 754 | took from the data, and once for the bits we are putting |
| 755 | back in to the data. */ |
| 756 | if ((vallo & 0x8000) != 0) |
| 757 | val -= 0x10000; |
| 758 | if ((val & 0x8000) != 0) |
| 759 | val += 0x10000; |
| 760 | |
| 761 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| 762 | bfd_put_32 (abfd, insn, l->addr); |
| 763 | |
| 764 | next = l->next; |
| 765 | free (l); |
| 766 | l = next; |
| 767 | } |
| 768 | |
| 769 | mips_refhi_list = NULL; |
| 770 | } |
| 771 | |
| 772 | /* Now do the REFLO reloc in the usual way. */ |
| 773 | return mips_generic_reloc (abfd, reloc_entry, symbol, data, |
| 774 | input_section, output_bfd, error_message); |
| 775 | } |
| 776 | |
| 777 | /* Do a GPREL relocation. This is a 16 bit value which must become |
| 778 | the offset from the gp register. */ |
| 779 | |
| 780 | static bfd_reloc_status_type |
| 781 | mips_gprel_reloc (abfd, |
| 782 | reloc_entry, |
| 783 | symbol, |
| 784 | data, |
| 785 | input_section, |
| 786 | output_bfd, |
| 787 | error_message) |
| 788 | bfd *abfd; |
| 789 | arelent *reloc_entry; |
| 790 | asymbol *symbol; |
| 791 | PTR data; |
| 792 | asection *input_section; |
| 793 | bfd *output_bfd; |
| 794 | char **error_message; |
| 795 | { |
| 796 | boolean relocateable; |
| 797 | bfd_vma gp; |
| 798 | bfd_vma relocation; |
| 799 | unsigned long val; |
| 800 | unsigned long insn; |
| 801 | |
| 802 | /* If we're relocating, and this is an external symbol with no |
| 803 | addend, we don't want to change anything. We will only have an |
| 804 | addend if this is a newly created reloc, not read from an ECOFF |
| 805 | file. */ |
| 806 | if (output_bfd != (bfd *) NULL |
| 807 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 808 | && reloc_entry->addend == 0) |
| 809 | { |
| 810 | reloc_entry->address += input_section->output_offset; |
| 811 | return bfd_reloc_ok; |
| 812 | } |
| 813 | |
| 814 | if (output_bfd != (bfd *) NULL) |
| 815 | relocateable = true; |
| 816 | else |
| 817 | { |
| 818 | relocateable = false; |
| 819 | output_bfd = symbol->section->output_section->owner; |
| 820 | } |
| 821 | |
| 822 | if (bfd_is_und_section (symbol->section) |
| 823 | && relocateable == false) |
| 824 | return bfd_reloc_undefined; |
| 825 | |
| 826 | /* We have to figure out the gp value, so that we can adjust the |
| 827 | symbol value correctly. We look up the symbol _gp in the output |
| 828 | BFD. If we can't find it, we're stuck. We cache it in the ECOFF |
| 829 | target data. We don't need to adjust the symbol value for an |
| 830 | external symbol if we are producing relocateable output. */ |
| 831 | gp = _bfd_get_gp_value (output_bfd); |
| 832 | if (gp == 0 |
| 833 | && (relocateable == false |
| 834 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 835 | { |
| 836 | if (relocateable != false) |
| 837 | { |
| 838 | /* Make up a value. */ |
| 839 | gp = symbol->section->output_section->vma + 0x4000; |
| 840 | _bfd_set_gp_value (output_bfd, gp); |
| 841 | } |
| 842 | else |
| 843 | { |
| 844 | unsigned int count; |
| 845 | asymbol **sym; |
| 846 | unsigned int i; |
| 847 | |
| 848 | count = bfd_get_symcount (output_bfd); |
| 849 | sym = bfd_get_outsymbols (output_bfd); |
| 850 | |
| 851 | if (sym == (asymbol **) NULL) |
| 852 | i = count; |
| 853 | else |
| 854 | { |
| 855 | for (i = 0; i < count; i++, sym++) |
| 856 | { |
| 857 | register CONST char *name; |
| 858 | |
| 859 | name = bfd_asymbol_name (*sym); |
| 860 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 861 | { |
| 862 | gp = bfd_asymbol_value (*sym); |
| 863 | _bfd_set_gp_value (output_bfd, gp); |
| 864 | break; |
| 865 | } |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | if (i >= count) |
| 870 | { |
| 871 | /* Only get the error once. */ |
| 872 | gp = 4; |
| 873 | _bfd_set_gp_value (output_bfd, gp); |
| 874 | *error_message = |
| 875 | (char *) _("GP relative relocation when _gp not defined"); |
| 876 | return bfd_reloc_dangerous; |
| 877 | } |
| 878 | } |
| 879 | } |
| 880 | |
| 881 | if (bfd_is_com_section (symbol->section)) |
| 882 | relocation = 0; |
| 883 | else |
| 884 | relocation = symbol->value; |
| 885 | |
| 886 | relocation += symbol->section->output_section->vma; |
| 887 | relocation += symbol->section->output_offset; |
| 888 | |
| 889 | if (reloc_entry->address > input_section->_cooked_size) |
| 890 | return bfd_reloc_outofrange; |
| 891 | |
| 892 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 893 | |
| 894 | /* Set val to the offset into the section or symbol. */ |
| 895 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; |
| 896 | if (val & 0x8000) |
| 897 | val -= 0x10000; |
| 898 | |
| 899 | /* Adjust val for the final section location and GP value. If we |
| 900 | are producing relocateable output, we don't want to do this for |
| 901 | an external symbol. */ |
| 902 | if (relocateable == false |
| 903 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 904 | val += relocation - gp; |
| 905 | |
| 906 | insn = (insn &~ 0xffff) | (val & 0xffff); |
| 907 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 908 | |
| 909 | if (relocateable != false) |
| 910 | reloc_entry->address += input_section->output_offset; |
| 911 | |
| 912 | /* Make sure it fit in 16 bits. */ |
| 913 | if (val >= 0x8000 && val < 0xffff8000) |
| 914 | return bfd_reloc_overflow; |
| 915 | |
| 916 | return bfd_reloc_ok; |
| 917 | } |
| 918 | |
| 919 | /* Do a RELHI relocation. We do this in conjunction with a RELLO |
| 920 | reloc, just as REFHI and REFLO are done together. RELHI and RELLO |
| 921 | are Cygnus extensions used when generating position independent |
| 922 | code for embedded systems. */ |
| 923 | |
| 924 | /* FIXME: This should not be a static variable. */ |
| 925 | |
| 926 | static struct mips_hi *mips_relhi_list; |
| 927 | |
| 928 | static bfd_reloc_status_type |
| 929 | mips_relhi_reloc (abfd, |
| 930 | reloc_entry, |
| 931 | symbol, |
| 932 | data, |
| 933 | input_section, |
| 934 | output_bfd, |
| 935 | error_message) |
| 936 | bfd *abfd ATTRIBUTE_UNUSED; |
| 937 | arelent *reloc_entry; |
| 938 | asymbol *symbol; |
| 939 | PTR data; |
| 940 | asection *input_section; |
| 941 | bfd *output_bfd; |
| 942 | char **error_message ATTRIBUTE_UNUSED; |
| 943 | { |
| 944 | bfd_reloc_status_type ret; |
| 945 | bfd_vma relocation; |
| 946 | struct mips_hi *n; |
| 947 | |
| 948 | /* If this is a reloc against a section symbol, then it is correct |
| 949 | in the object file. The only time we want to change this case is |
| 950 | when we are relaxing, and that is handled entirely by |
| 951 | mips_relocate_section and never calls this function. */ |
| 952 | if ((symbol->flags & BSF_SECTION_SYM) != 0) |
| 953 | { |
| 954 | if (output_bfd != (bfd *) NULL) |
| 955 | reloc_entry->address += input_section->output_offset; |
| 956 | return bfd_reloc_ok; |
| 957 | } |
| 958 | |
| 959 | /* This is an external symbol. If we're relocating, we don't want |
| 960 | to change anything. */ |
| 961 | if (output_bfd != (bfd *) NULL) |
| 962 | { |
| 963 | reloc_entry->address += input_section->output_offset; |
| 964 | return bfd_reloc_ok; |
| 965 | } |
| 966 | |
| 967 | ret = bfd_reloc_ok; |
| 968 | if (bfd_is_und_section (symbol->section) |
| 969 | && output_bfd == (bfd *) NULL) |
| 970 | ret = bfd_reloc_undefined; |
| 971 | |
| 972 | if (bfd_is_com_section (symbol->section)) |
| 973 | relocation = 0; |
| 974 | else |
| 975 | relocation = symbol->value; |
| 976 | |
| 977 | relocation += symbol->section->output_section->vma; |
| 978 | relocation += symbol->section->output_offset; |
| 979 | relocation += reloc_entry->addend; |
| 980 | |
| 981 | if (reloc_entry->address > input_section->_cooked_size) |
| 982 | return bfd_reloc_outofrange; |
| 983 | |
| 984 | /* Save the information, and let RELLO do the actual relocation. */ |
| 985 | n = (struct mips_hi *) bfd_malloc (sizeof *n); |
| 986 | if (n == NULL) |
| 987 | return bfd_reloc_outofrange; |
| 988 | n->addr = (bfd_byte *) data + reloc_entry->address; |
| 989 | n->addend = relocation; |
| 990 | n->next = mips_relhi_list; |
| 991 | mips_relhi_list = n; |
| 992 | |
| 993 | if (output_bfd != (bfd *) NULL) |
| 994 | reloc_entry->address += input_section->output_offset; |
| 995 | |
| 996 | return ret; |
| 997 | } |
| 998 | |
| 999 | /* Do a RELLO relocation. This is a straightforward 16 bit PC |
| 1000 | relative relocation; this function exists in order to do the RELHI |
| 1001 | relocation described above. */ |
| 1002 | |
| 1003 | static bfd_reloc_status_type |
| 1004 | mips_rello_reloc (abfd, |
| 1005 | reloc_entry, |
| 1006 | symbol, |
| 1007 | data, |
| 1008 | input_section, |
| 1009 | output_bfd, |
| 1010 | error_message) |
| 1011 | bfd *abfd; |
| 1012 | arelent *reloc_entry; |
| 1013 | asymbol *symbol; |
| 1014 | PTR data; |
| 1015 | asection *input_section; |
| 1016 | bfd *output_bfd; |
| 1017 | char **error_message; |
| 1018 | { |
| 1019 | if (mips_relhi_list != NULL) |
| 1020 | { |
| 1021 | struct mips_hi *l; |
| 1022 | |
| 1023 | l = mips_relhi_list; |
| 1024 | while (l != NULL) |
| 1025 | { |
| 1026 | unsigned long insn; |
| 1027 | unsigned long val; |
| 1028 | unsigned long vallo; |
| 1029 | struct mips_hi *next; |
| 1030 | |
| 1031 | /* Do the RELHI relocation. Note that we actually don't |
| 1032 | need to know anything about the RELLO itself, except |
| 1033 | where to find the low 16 bits of the addend needed by the |
| 1034 | RELHI. */ |
| 1035 | insn = bfd_get_32 (abfd, l->addr); |
| 1036 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) |
| 1037 | & 0xffff); |
| 1038 | val = ((insn & 0xffff) << 16) + vallo; |
| 1039 | val += l->addend; |
| 1040 | |
| 1041 | /* If the symbol is defined, make val PC relative. If the |
| 1042 | symbol is not defined we don't want to do this, because |
| 1043 | we don't want the value in the object file to incorporate |
| 1044 | the address of the reloc. */ |
| 1045 | if (! bfd_is_und_section (bfd_get_section (symbol)) |
| 1046 | && ! bfd_is_com_section (bfd_get_section (symbol))) |
| 1047 | val -= (input_section->output_section->vma |
| 1048 | + input_section->output_offset |
| 1049 | + reloc_entry->address); |
| 1050 | |
| 1051 | /* The low order 16 bits are always treated as a signed |
| 1052 | value. Therefore, a negative value in the low order bits |
| 1053 | requires an adjustment in the high order bits. We need |
| 1054 | to make this adjustment in two ways: once for the bits we |
| 1055 | took from the data, and once for the bits we are putting |
| 1056 | back in to the data. */ |
| 1057 | if ((vallo & 0x8000) != 0) |
| 1058 | val -= 0x10000; |
| 1059 | if ((val & 0x8000) != 0) |
| 1060 | val += 0x10000; |
| 1061 | |
| 1062 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| 1063 | bfd_put_32 (abfd, insn, l->addr); |
| 1064 | |
| 1065 | next = l->next; |
| 1066 | free (l); |
| 1067 | l = next; |
| 1068 | } |
| 1069 | |
| 1070 | mips_relhi_list = NULL; |
| 1071 | } |
| 1072 | |
| 1073 | /* If this is a reloc against a section symbol, then it is correct |
| 1074 | in the object file. The only time we want to change this case is |
| 1075 | when we are relaxing, and that is handled entirely by |
| 1076 | mips_relocate_section and never calls this function. */ |
| 1077 | if ((symbol->flags & BSF_SECTION_SYM) != 0) |
| 1078 | { |
| 1079 | if (output_bfd != (bfd *) NULL) |
| 1080 | reloc_entry->address += input_section->output_offset; |
| 1081 | return bfd_reloc_ok; |
| 1082 | } |
| 1083 | |
| 1084 | /* bfd_perform_relocation does not handle pcrel_offset relocations |
| 1085 | correctly when generating a relocateable file, so handle them |
| 1086 | directly here. */ |
| 1087 | if (output_bfd != (bfd *) NULL) |
| 1088 | { |
| 1089 | reloc_entry->address += input_section->output_offset; |
| 1090 | return bfd_reloc_ok; |
| 1091 | } |
| 1092 | |
| 1093 | /* Now do the RELLO reloc in the usual way. */ |
| 1094 | return mips_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1095 | input_section, output_bfd, error_message); |
| 1096 | } |
| 1097 | |
| 1098 | /* This is the special function for the MIPS_R_SWITCH reloc. This |
| 1099 | special reloc is normally correct in the object file, and only |
| 1100 | requires special handling when relaxing. We don't want |
| 1101 | bfd_perform_relocation to tamper with it at all. */ |
| 1102 | |
| 1103 | /*ARGSUSED*/ |
| 1104 | static bfd_reloc_status_type |
| 1105 | mips_switch_reloc (abfd, |
| 1106 | reloc_entry, |
| 1107 | symbol, |
| 1108 | data, |
| 1109 | input_section, |
| 1110 | output_bfd, |
| 1111 | error_message) |
| 1112 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1113 | arelent *reloc_entry ATTRIBUTE_UNUSED; |
| 1114 | asymbol *symbol ATTRIBUTE_UNUSED; |
| 1115 | PTR data ATTRIBUTE_UNUSED; |
| 1116 | asection *input_section ATTRIBUTE_UNUSED; |
| 1117 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 1118 | char **error_message ATTRIBUTE_UNUSED; |
| 1119 | { |
| 1120 | return bfd_reloc_ok; |
| 1121 | } |
| 1122 | |
| 1123 | /* Get the howto structure for a generic reloc type. */ |
| 1124 | |
| 1125 | static reloc_howto_type * |
| 1126 | mips_bfd_reloc_type_lookup (abfd, code) |
| 1127 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1128 | bfd_reloc_code_real_type code; |
| 1129 | { |
| 1130 | int mips_type; |
| 1131 | |
| 1132 | switch (code) |
| 1133 | { |
| 1134 | case BFD_RELOC_16: |
| 1135 | mips_type = MIPS_R_REFHALF; |
| 1136 | break; |
| 1137 | case BFD_RELOC_32: |
| 1138 | case BFD_RELOC_CTOR: |
| 1139 | mips_type = MIPS_R_REFWORD; |
| 1140 | break; |
| 1141 | case BFD_RELOC_MIPS_JMP: |
| 1142 | mips_type = MIPS_R_JMPADDR; |
| 1143 | break; |
| 1144 | case BFD_RELOC_HI16_S: |
| 1145 | mips_type = MIPS_R_REFHI; |
| 1146 | break; |
| 1147 | case BFD_RELOC_LO16: |
| 1148 | mips_type = MIPS_R_REFLO; |
| 1149 | break; |
| 1150 | case BFD_RELOC_MIPS_GPREL: |
| 1151 | mips_type = MIPS_R_GPREL; |
| 1152 | break; |
| 1153 | case BFD_RELOC_MIPS_LITERAL: |
| 1154 | mips_type = MIPS_R_LITERAL; |
| 1155 | break; |
| 1156 | case BFD_RELOC_16_PCREL_S2: |
| 1157 | mips_type = MIPS_R_PCREL16; |
| 1158 | break; |
| 1159 | case BFD_RELOC_PCREL_HI16_S: |
| 1160 | mips_type = MIPS_R_RELHI; |
| 1161 | break; |
| 1162 | case BFD_RELOC_PCREL_LO16: |
| 1163 | mips_type = MIPS_R_RELLO; |
| 1164 | break; |
| 1165 | case BFD_RELOC_GPREL32: |
| 1166 | mips_type = MIPS_R_SWITCH; |
| 1167 | break; |
| 1168 | default: |
| 1169 | return (reloc_howto_type *) NULL; |
| 1170 | } |
| 1171 | |
| 1172 | return &mips_howto_table[mips_type]; |
| 1173 | } |
| 1174 | \f |
| 1175 | /* A helper routine for mips_relocate_section which handles the REFHI |
| 1176 | and RELHI relocations. The REFHI relocation must be followed by a |
| 1177 | REFLO relocation (and RELHI by a RELLO), and the addend used is |
| 1178 | formed from the addends of both instructions. */ |
| 1179 | |
| 1180 | static void |
| 1181 | mips_relocate_hi (refhi, reflo, input_bfd, input_section, contents, adjust, |
| 1182 | relocation, pcrel) |
| 1183 | struct internal_reloc *refhi; |
| 1184 | struct internal_reloc *reflo; |
| 1185 | bfd *input_bfd; |
| 1186 | asection *input_section; |
| 1187 | bfd_byte *contents; |
| 1188 | size_t adjust; |
| 1189 | bfd_vma relocation; |
| 1190 | boolean pcrel; |
| 1191 | { |
| 1192 | unsigned long insn; |
| 1193 | unsigned long val; |
| 1194 | unsigned long vallo; |
| 1195 | |
| 1196 | if (refhi == NULL) |
| 1197 | return; |
| 1198 | |
| 1199 | insn = bfd_get_32 (input_bfd, |
| 1200 | contents + adjust + refhi->r_vaddr - input_section->vma); |
| 1201 | if (reflo == NULL) |
| 1202 | vallo = 0; |
| 1203 | else |
| 1204 | vallo = (bfd_get_32 (input_bfd, |
| 1205 | contents + adjust + reflo->r_vaddr - input_section->vma) |
| 1206 | & 0xffff); |
| 1207 | |
| 1208 | val = ((insn & 0xffff) << 16) + vallo; |
| 1209 | val += relocation; |
| 1210 | |
| 1211 | /* The low order 16 bits are always treated as a signed value. |
| 1212 | Therefore, a negative value in the low order bits requires an |
| 1213 | adjustment in the high order bits. We need to make this |
| 1214 | adjustment in two ways: once for the bits we took from the data, |
| 1215 | and once for the bits we are putting back in to the data. */ |
| 1216 | if ((vallo & 0x8000) != 0) |
| 1217 | val -= 0x10000; |
| 1218 | |
| 1219 | if (pcrel) |
| 1220 | val -= (input_section->output_section->vma |
| 1221 | + input_section->output_offset |
| 1222 | + (reflo->r_vaddr - input_section->vma + adjust)); |
| 1223 | |
| 1224 | if ((val & 0x8000) != 0) |
| 1225 | val += 0x10000; |
| 1226 | |
| 1227 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| 1228 | bfd_put_32 (input_bfd, (bfd_vma) insn, |
| 1229 | contents + adjust + refhi->r_vaddr - input_section->vma); |
| 1230 | } |
| 1231 | |
| 1232 | /* Relocate a section while linking a MIPS ECOFF file. */ |
| 1233 | |
| 1234 | static boolean |
| 1235 | mips_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1236 | contents, external_relocs) |
| 1237 | bfd *output_bfd; |
| 1238 | struct bfd_link_info *info; |
| 1239 | bfd *input_bfd; |
| 1240 | asection *input_section; |
| 1241 | bfd_byte *contents; |
| 1242 | PTR external_relocs; |
| 1243 | { |
| 1244 | asection **symndx_to_section; |
| 1245 | struct ecoff_link_hash_entry **sym_hashes; |
| 1246 | bfd_vma gp; |
| 1247 | boolean gp_undefined; |
| 1248 | size_t adjust; |
| 1249 | long *offsets; |
| 1250 | struct external_reloc *ext_rel; |
| 1251 | struct external_reloc *ext_rel_end; |
| 1252 | unsigned int i; |
| 1253 | boolean got_lo; |
| 1254 | struct internal_reloc lo_int_rel; |
| 1255 | |
| 1256 | BFD_ASSERT (input_bfd->xvec->byteorder |
| 1257 | == output_bfd->xvec->byteorder); |
| 1258 | |
| 1259 | /* We keep a table mapping the symndx found in an internal reloc to |
| 1260 | the appropriate section. This is faster than looking up the |
| 1261 | section by name each time. */ |
| 1262 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; |
| 1263 | if (symndx_to_section == (asection **) NULL) |
| 1264 | { |
| 1265 | symndx_to_section = ((asection **) |
| 1266 | bfd_alloc (input_bfd, |
| 1267 | (NUM_RELOC_SECTIONS |
| 1268 | * sizeof (asection *)))); |
| 1269 | if (!symndx_to_section) |
| 1270 | return false; |
| 1271 | |
| 1272 | symndx_to_section[RELOC_SECTION_NONE] = NULL; |
| 1273 | symndx_to_section[RELOC_SECTION_TEXT] = |
| 1274 | bfd_get_section_by_name (input_bfd, ".text"); |
| 1275 | symndx_to_section[RELOC_SECTION_RDATA] = |
| 1276 | bfd_get_section_by_name (input_bfd, ".rdata"); |
| 1277 | symndx_to_section[RELOC_SECTION_DATA] = |
| 1278 | bfd_get_section_by_name (input_bfd, ".data"); |
| 1279 | symndx_to_section[RELOC_SECTION_SDATA] = |
| 1280 | bfd_get_section_by_name (input_bfd, ".sdata"); |
| 1281 | symndx_to_section[RELOC_SECTION_SBSS] = |
| 1282 | bfd_get_section_by_name (input_bfd, ".sbss"); |
| 1283 | symndx_to_section[RELOC_SECTION_BSS] = |
| 1284 | bfd_get_section_by_name (input_bfd, ".bss"); |
| 1285 | symndx_to_section[RELOC_SECTION_INIT] = |
| 1286 | bfd_get_section_by_name (input_bfd, ".init"); |
| 1287 | symndx_to_section[RELOC_SECTION_LIT8] = |
| 1288 | bfd_get_section_by_name (input_bfd, ".lit8"); |
| 1289 | symndx_to_section[RELOC_SECTION_LIT4] = |
| 1290 | bfd_get_section_by_name (input_bfd, ".lit4"); |
| 1291 | symndx_to_section[RELOC_SECTION_XDATA] = NULL; |
| 1292 | symndx_to_section[RELOC_SECTION_PDATA] = NULL; |
| 1293 | symndx_to_section[RELOC_SECTION_FINI] = |
| 1294 | bfd_get_section_by_name (input_bfd, ".fini"); |
| 1295 | symndx_to_section[RELOC_SECTION_LITA] = NULL; |
| 1296 | symndx_to_section[RELOC_SECTION_ABS] = NULL; |
| 1297 | |
| 1298 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; |
| 1299 | } |
| 1300 | |
| 1301 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; |
| 1302 | |
| 1303 | gp = _bfd_get_gp_value (output_bfd); |
| 1304 | if (gp == 0) |
| 1305 | gp_undefined = true; |
| 1306 | else |
| 1307 | gp_undefined = false; |
| 1308 | |
| 1309 | got_lo = false; |
| 1310 | |
| 1311 | adjust = 0; |
| 1312 | |
| 1313 | if (ecoff_section_data (input_bfd, input_section) == NULL) |
| 1314 | offsets = NULL; |
| 1315 | else |
| 1316 | offsets = ecoff_section_data (input_bfd, input_section)->offsets; |
| 1317 | |
| 1318 | ext_rel = (struct external_reloc *) external_relocs; |
| 1319 | ext_rel_end = ext_rel + input_section->reloc_count; |
| 1320 | for (i = 0; ext_rel < ext_rel_end; ext_rel++, i++) |
| 1321 | { |
| 1322 | struct internal_reloc int_rel; |
| 1323 | boolean use_lo = false; |
| 1324 | bfd_vma addend; |
| 1325 | reloc_howto_type *howto; |
| 1326 | struct ecoff_link_hash_entry *h = NULL; |
| 1327 | asection *s = NULL; |
| 1328 | bfd_vma relocation; |
| 1329 | bfd_reloc_status_type r; |
| 1330 | |
| 1331 | if (! got_lo) |
| 1332 | mips_ecoff_swap_reloc_in (input_bfd, (PTR) ext_rel, &int_rel); |
| 1333 | else |
| 1334 | { |
| 1335 | int_rel = lo_int_rel; |
| 1336 | got_lo = false; |
| 1337 | } |
| 1338 | |
| 1339 | BFD_ASSERT (int_rel.r_type |
| 1340 | < sizeof mips_howto_table / sizeof mips_howto_table[0]); |
| 1341 | |
| 1342 | /* The REFHI and RELHI relocs requires special handling. they |
| 1343 | must be followed by a REFLO or RELLO reloc, respectively, and |
| 1344 | the addend is formed from both relocs. */ |
| 1345 | if (int_rel.r_type == MIPS_R_REFHI |
| 1346 | || int_rel.r_type == MIPS_R_RELHI) |
| 1347 | { |
| 1348 | struct external_reloc *lo_ext_rel; |
| 1349 | |
| 1350 | /* As a GNU extension, permit an arbitrary number of REFHI |
| 1351 | or RELHI relocs before the REFLO or RELLO reloc. This |
| 1352 | permits gcc to emit the HI and LO relocs itself. */ |
| 1353 | for (lo_ext_rel = ext_rel + 1; |
| 1354 | lo_ext_rel < ext_rel_end; |
| 1355 | lo_ext_rel++) |
| 1356 | { |
| 1357 | mips_ecoff_swap_reloc_in (input_bfd, (PTR) lo_ext_rel, |
| 1358 | &lo_int_rel); |
| 1359 | if (lo_int_rel.r_type != int_rel.r_type) |
| 1360 | break; |
| 1361 | } |
| 1362 | |
| 1363 | if (lo_ext_rel < ext_rel_end |
| 1364 | && (lo_int_rel.r_type |
| 1365 | == (int_rel.r_type == MIPS_R_REFHI |
| 1366 | ? MIPS_R_REFLO |
| 1367 | : MIPS_R_RELLO)) |
| 1368 | && int_rel.r_extern == lo_int_rel.r_extern |
| 1369 | && int_rel.r_symndx == lo_int_rel.r_symndx) |
| 1370 | { |
| 1371 | use_lo = true; |
| 1372 | if (lo_ext_rel == ext_rel + 1) |
| 1373 | got_lo = true; |
| 1374 | } |
| 1375 | } |
| 1376 | |
| 1377 | howto = &mips_howto_table[int_rel.r_type]; |
| 1378 | |
| 1379 | /* The SWITCH reloc must be handled specially. This reloc is |
| 1380 | marks the location of a difference between two portions of an |
| 1381 | object file. The symbol index does not reference a symbol, |
| 1382 | but is actually the offset from the reloc to the subtrahend |
| 1383 | of the difference. This reloc is correct in the object file, |
| 1384 | and needs no further adjustment, unless we are relaxing. If |
| 1385 | we are relaxing, we may have to add in an offset. Since no |
| 1386 | symbols are involved in this reloc, we handle it completely |
| 1387 | here. */ |
| 1388 | if (int_rel.r_type == MIPS_R_SWITCH) |
| 1389 | { |
| 1390 | if (offsets != NULL |
| 1391 | && offsets[i] != 0) |
| 1392 | { |
| 1393 | r = _bfd_relocate_contents (howto, input_bfd, |
| 1394 | (bfd_vma) offsets[i], |
| 1395 | (contents |
| 1396 | + adjust |
| 1397 | + int_rel.r_vaddr |
| 1398 | - input_section->vma)); |
| 1399 | BFD_ASSERT (r == bfd_reloc_ok); |
| 1400 | } |
| 1401 | |
| 1402 | continue; |
| 1403 | } |
| 1404 | |
| 1405 | if (int_rel.r_extern) |
| 1406 | { |
| 1407 | h = sym_hashes[int_rel.r_symndx]; |
| 1408 | /* If h is NULL, that means that there is a reloc against an |
| 1409 | external symbol which we thought was just a debugging |
| 1410 | symbol. This should not happen. */ |
| 1411 | if (h == (struct ecoff_link_hash_entry *) NULL) |
| 1412 | abort (); |
| 1413 | } |
| 1414 | else |
| 1415 | { |
| 1416 | if (int_rel.r_symndx < 0 || int_rel.r_symndx >= NUM_RELOC_SECTIONS) |
| 1417 | s = NULL; |
| 1418 | else |
| 1419 | s = symndx_to_section[int_rel.r_symndx]; |
| 1420 | |
| 1421 | if (s == (asection *) NULL) |
| 1422 | abort (); |
| 1423 | } |
| 1424 | |
| 1425 | /* The GPREL reloc uses an addend: the difference in the GP |
| 1426 | values. */ |
| 1427 | if (int_rel.r_type != MIPS_R_GPREL |
| 1428 | && int_rel.r_type != MIPS_R_LITERAL) |
| 1429 | addend = 0; |
| 1430 | else |
| 1431 | { |
| 1432 | if (gp_undefined) |
| 1433 | { |
| 1434 | if (! ((*info->callbacks->reloc_dangerous) |
| 1435 | (info, _("GP relative relocation when GP not defined"), |
| 1436 | input_bfd, input_section, |
| 1437 | int_rel.r_vaddr - input_section->vma))) |
| 1438 | return false; |
| 1439 | /* Only give the error once per link. */ |
| 1440 | gp = 4; |
| 1441 | _bfd_set_gp_value (output_bfd, gp); |
| 1442 | gp_undefined = false; |
| 1443 | } |
| 1444 | if (! int_rel.r_extern) |
| 1445 | { |
| 1446 | /* This is a relocation against a section. The current |
| 1447 | addend in the instruction is the difference between |
| 1448 | INPUT_SECTION->vma and the GP value of INPUT_BFD. We |
| 1449 | must change this to be the difference between the |
| 1450 | final definition (which will end up in RELOCATION) |
| 1451 | and the GP value of OUTPUT_BFD (which is in GP). */ |
| 1452 | addend = ecoff_data (input_bfd)->gp - gp; |
| 1453 | } |
| 1454 | else if (! info->relocateable |
| 1455 | || h->root.type == bfd_link_hash_defined |
| 1456 | || h->root.type == bfd_link_hash_defweak) |
| 1457 | { |
| 1458 | /* This is a relocation against a defined symbol. The |
| 1459 | current addend in the instruction is simply the |
| 1460 | desired offset into the symbol (normally zero). We |
| 1461 | are going to change this into a relocation against a |
| 1462 | defined symbol, so we want the instruction to hold |
| 1463 | the difference between the final definition of the |
| 1464 | symbol (which will end up in RELOCATION) and the GP |
| 1465 | value of OUTPUT_BFD (which is in GP). */ |
| 1466 | addend = - gp; |
| 1467 | } |
| 1468 | else |
| 1469 | { |
| 1470 | /* This is a relocation against an undefined or common |
| 1471 | symbol. The current addend in the instruction is |
| 1472 | simply the desired offset into the symbol (normally |
| 1473 | zero). We are generating relocateable output, and we |
| 1474 | aren't going to define this symbol, so we just leave |
| 1475 | the instruction alone. */ |
| 1476 | addend = 0; |
| 1477 | } |
| 1478 | } |
| 1479 | |
| 1480 | /* If we are relaxing, mips_relax_section may have set |
| 1481 | offsets[i] to some value. A value of 1 means we must expand |
| 1482 | a PC relative branch into a multi-instruction of sequence, |
| 1483 | and any other value is an addend. */ |
| 1484 | if (offsets != NULL |
| 1485 | && offsets[i] != 0) |
| 1486 | { |
| 1487 | BFD_ASSERT (! info->relocateable); |
| 1488 | BFD_ASSERT (int_rel.r_type == MIPS_R_PCREL16 |
| 1489 | || int_rel.r_type == MIPS_R_RELHI |
| 1490 | || int_rel.r_type == MIPS_R_RELLO); |
| 1491 | if (offsets[i] != 1) |
| 1492 | addend += offsets[i]; |
| 1493 | else |
| 1494 | { |
| 1495 | bfd_byte *here; |
| 1496 | |
| 1497 | BFD_ASSERT (int_rel.r_extern |
| 1498 | && int_rel.r_type == MIPS_R_PCREL16); |
| 1499 | |
| 1500 | /* Move the rest of the instructions up. */ |
| 1501 | here = (contents |
| 1502 | + adjust |
| 1503 | + int_rel.r_vaddr |
| 1504 | - input_section->vma); |
| 1505 | memmove (here + PCREL16_EXPANSION_ADJUSTMENT, here, |
| 1506 | (size_t) (input_section->_raw_size |
| 1507 | - (int_rel.r_vaddr - input_section->vma))); |
| 1508 | |
| 1509 | /* Generate the new instructions. */ |
| 1510 | if (! mips_relax_pcrel16 (info, input_bfd, input_section, |
| 1511 | h, here, |
| 1512 | (input_section->output_section->vma |
| 1513 | + input_section->output_offset |
| 1514 | + (int_rel.r_vaddr |
| 1515 | - input_section->vma) |
| 1516 | + adjust))) |
| 1517 | return false; |
| 1518 | |
| 1519 | /* We must adjust everything else up a notch. */ |
| 1520 | adjust += PCREL16_EXPANSION_ADJUSTMENT; |
| 1521 | |
| 1522 | /* mips_relax_pcrel16 handles all the details of this |
| 1523 | relocation. */ |
| 1524 | continue; |
| 1525 | } |
| 1526 | } |
| 1527 | |
| 1528 | /* If we are relaxing, and this is a reloc against the .text |
| 1529 | segment, we may need to adjust it if some branches have been |
| 1530 | expanded. The reloc types which are likely to occur in the |
| 1531 | .text section are handled efficiently by mips_relax_section, |
| 1532 | and thus do not need to be handled here. */ |
| 1533 | if (ecoff_data (input_bfd)->debug_info.adjust != NULL |
| 1534 | && ! int_rel.r_extern |
| 1535 | && int_rel.r_symndx == RELOC_SECTION_TEXT |
| 1536 | && (strcmp (bfd_get_section_name (input_bfd, input_section), |
| 1537 | ".text") != 0 |
| 1538 | || (int_rel.r_type != MIPS_R_PCREL16 |
| 1539 | && int_rel.r_type != MIPS_R_SWITCH |
| 1540 | && int_rel.r_type != MIPS_R_RELHI |
| 1541 | && int_rel.r_type != MIPS_R_RELLO))) |
| 1542 | { |
| 1543 | bfd_vma adr; |
| 1544 | struct ecoff_value_adjust *a; |
| 1545 | |
| 1546 | /* We need to get the addend so that we know whether we need |
| 1547 | to adjust the address. */ |
| 1548 | BFD_ASSERT (int_rel.r_type == MIPS_R_REFWORD); |
| 1549 | |
| 1550 | adr = bfd_get_32 (input_bfd, |
| 1551 | (contents |
| 1552 | + adjust |
| 1553 | + int_rel.r_vaddr |
| 1554 | - input_section->vma)); |
| 1555 | |
| 1556 | for (a = ecoff_data (input_bfd)->debug_info.adjust; |
| 1557 | a != (struct ecoff_value_adjust *) NULL; |
| 1558 | a = a->next) |
| 1559 | { |
| 1560 | if (adr >= a->start && adr < a->end) |
| 1561 | addend += a->adjust; |
| 1562 | } |
| 1563 | } |
| 1564 | |
| 1565 | if (info->relocateable) |
| 1566 | { |
| 1567 | /* We are generating relocateable output, and must convert |
| 1568 | the existing reloc. */ |
| 1569 | if (int_rel.r_extern) |
| 1570 | { |
| 1571 | if ((h->root.type == bfd_link_hash_defined |
| 1572 | || h->root.type == bfd_link_hash_defweak) |
| 1573 | && ! bfd_is_abs_section (h->root.u.def.section)) |
| 1574 | { |
| 1575 | const char *name; |
| 1576 | |
| 1577 | /* This symbol is defined in the output. Convert |
| 1578 | the reloc from being against the symbol to being |
| 1579 | against the section. */ |
| 1580 | |
| 1581 | /* Clear the r_extern bit. */ |
| 1582 | int_rel.r_extern = 0; |
| 1583 | |
| 1584 | /* Compute a new r_symndx value. */ |
| 1585 | s = h->root.u.def.section; |
| 1586 | name = bfd_get_section_name (output_bfd, |
| 1587 | s->output_section); |
| 1588 | |
| 1589 | int_rel.r_symndx = -1; |
| 1590 | switch (name[1]) |
| 1591 | { |
| 1592 | case 'b': |
| 1593 | if (strcmp (name, ".bss") == 0) |
| 1594 | int_rel.r_symndx = RELOC_SECTION_BSS; |
| 1595 | break; |
| 1596 | case 'd': |
| 1597 | if (strcmp (name, ".data") == 0) |
| 1598 | int_rel.r_symndx = RELOC_SECTION_DATA; |
| 1599 | break; |
| 1600 | case 'f': |
| 1601 | if (strcmp (name, ".fini") == 0) |
| 1602 | int_rel.r_symndx = RELOC_SECTION_FINI; |
| 1603 | break; |
| 1604 | case 'i': |
| 1605 | if (strcmp (name, ".init") == 0) |
| 1606 | int_rel.r_symndx = RELOC_SECTION_INIT; |
| 1607 | break; |
| 1608 | case 'l': |
| 1609 | if (strcmp (name, ".lit8") == 0) |
| 1610 | int_rel.r_symndx = RELOC_SECTION_LIT8; |
| 1611 | else if (strcmp (name, ".lit4") == 0) |
| 1612 | int_rel.r_symndx = RELOC_SECTION_LIT4; |
| 1613 | break; |
| 1614 | case 'r': |
| 1615 | if (strcmp (name, ".rdata") == 0) |
| 1616 | int_rel.r_symndx = RELOC_SECTION_RDATA; |
| 1617 | break; |
| 1618 | case 's': |
| 1619 | if (strcmp (name, ".sdata") == 0) |
| 1620 | int_rel.r_symndx = RELOC_SECTION_SDATA; |
| 1621 | else if (strcmp (name, ".sbss") == 0) |
| 1622 | int_rel.r_symndx = RELOC_SECTION_SBSS; |
| 1623 | break; |
| 1624 | case 't': |
| 1625 | if (strcmp (name, ".text") == 0) |
| 1626 | int_rel.r_symndx = RELOC_SECTION_TEXT; |
| 1627 | break; |
| 1628 | } |
| 1629 | |
| 1630 | if (int_rel.r_symndx == -1) |
| 1631 | abort (); |
| 1632 | |
| 1633 | /* Add the section VMA and the symbol value. */ |
| 1634 | relocation = (h->root.u.def.value |
| 1635 | + s->output_section->vma |
| 1636 | + s->output_offset); |
| 1637 | |
| 1638 | /* For a PC relative relocation, the object file |
| 1639 | currently holds just the addend. We must adjust |
| 1640 | by the address to get the right value. */ |
| 1641 | if (howto->pc_relative) |
| 1642 | { |
| 1643 | relocation -= int_rel.r_vaddr - input_section->vma; |
| 1644 | |
| 1645 | /* If we are converting a RELHI or RELLO reloc |
| 1646 | from being against an external symbol to |
| 1647 | being against a section, we must put a |
| 1648 | special value into the r_offset field. This |
| 1649 | value is the old addend. The r_offset for |
| 1650 | both the RELHI and RELLO relocs are the same, |
| 1651 | and we set both when we see RELHI. */ |
| 1652 | if (int_rel.r_type == MIPS_R_RELHI) |
| 1653 | { |
| 1654 | long addhi, addlo; |
| 1655 | |
| 1656 | addhi = bfd_get_32 (input_bfd, |
| 1657 | (contents |
| 1658 | + adjust |
| 1659 | + int_rel.r_vaddr |
| 1660 | - input_section->vma)); |
| 1661 | addhi &= 0xffff; |
| 1662 | if (addhi & 0x8000) |
| 1663 | addhi -= 0x10000; |
| 1664 | addhi <<= 16; |
| 1665 | |
| 1666 | if (! use_lo) |
| 1667 | addlo = 0; |
| 1668 | else |
| 1669 | { |
| 1670 | addlo = bfd_get_32 (input_bfd, |
| 1671 | (contents |
| 1672 | + adjust |
| 1673 | + lo_int_rel.r_vaddr |
| 1674 | - input_section->vma)); |
| 1675 | addlo &= 0xffff; |
| 1676 | if (addlo & 0x8000) |
| 1677 | addlo -= 0x10000; |
| 1678 | |
| 1679 | lo_int_rel.r_offset = addhi + addlo; |
| 1680 | } |
| 1681 | |
| 1682 | int_rel.r_offset = addhi + addlo; |
| 1683 | } |
| 1684 | } |
| 1685 | |
| 1686 | h = NULL; |
| 1687 | } |
| 1688 | else |
| 1689 | { |
| 1690 | /* Change the symndx value to the right one for the |
| 1691 | output BFD. */ |
| 1692 | int_rel.r_symndx = h->indx; |
| 1693 | if (int_rel.r_symndx == -1) |
| 1694 | { |
| 1695 | /* This symbol is not being written out. */ |
| 1696 | if (! ((*info->callbacks->unattached_reloc) |
| 1697 | (info, h->root.root.string, input_bfd, |
| 1698 | input_section, |
| 1699 | int_rel.r_vaddr - input_section->vma))) |
| 1700 | return false; |
| 1701 | int_rel.r_symndx = 0; |
| 1702 | } |
| 1703 | relocation = 0; |
| 1704 | } |
| 1705 | } |
| 1706 | else |
| 1707 | { |
| 1708 | /* This is a relocation against a section. Adjust the |
| 1709 | value by the amount the section moved. */ |
| 1710 | relocation = (s->output_section->vma |
| 1711 | + s->output_offset |
| 1712 | - s->vma); |
| 1713 | } |
| 1714 | |
| 1715 | relocation += addend; |
| 1716 | addend = 0; |
| 1717 | |
| 1718 | /* Adjust a PC relative relocation by removing the reference |
| 1719 | to the original address in the section and including the |
| 1720 | reference to the new address. However, external RELHI |
| 1721 | and RELLO relocs are PC relative, but don't include any |
| 1722 | reference to the address. The addend is merely an |
| 1723 | addend. */ |
| 1724 | if (howto->pc_relative |
| 1725 | && (! int_rel.r_extern |
| 1726 | || (int_rel.r_type != MIPS_R_RELHI |
| 1727 | && int_rel.r_type != MIPS_R_RELLO))) |
| 1728 | relocation -= (input_section->output_section->vma |
| 1729 | + input_section->output_offset |
| 1730 | - input_section->vma); |
| 1731 | |
| 1732 | /* Adjust the contents. */ |
| 1733 | if (relocation == 0) |
| 1734 | r = bfd_reloc_ok; |
| 1735 | else |
| 1736 | { |
| 1737 | if (int_rel.r_type != MIPS_R_REFHI |
| 1738 | && int_rel.r_type != MIPS_R_RELHI) |
| 1739 | r = _bfd_relocate_contents (howto, input_bfd, relocation, |
| 1740 | (contents |
| 1741 | + adjust |
| 1742 | + int_rel.r_vaddr |
| 1743 | - input_section->vma)); |
| 1744 | else |
| 1745 | { |
| 1746 | mips_relocate_hi (&int_rel, |
| 1747 | use_lo ? &lo_int_rel : NULL, |
| 1748 | input_bfd, input_section, contents, |
| 1749 | adjust, relocation, |
| 1750 | int_rel.r_type == MIPS_R_RELHI); |
| 1751 | r = bfd_reloc_ok; |
| 1752 | } |
| 1753 | } |
| 1754 | |
| 1755 | /* Adjust the reloc address. */ |
| 1756 | int_rel.r_vaddr += (input_section->output_section->vma |
| 1757 | + input_section->output_offset |
| 1758 | - input_section->vma); |
| 1759 | |
| 1760 | /* Save the changed reloc information. */ |
| 1761 | mips_ecoff_swap_reloc_out (input_bfd, &int_rel, (PTR) ext_rel); |
| 1762 | } |
| 1763 | else |
| 1764 | { |
| 1765 | /* We are producing a final executable. */ |
| 1766 | if (int_rel.r_extern) |
| 1767 | { |
| 1768 | /* This is a reloc against a symbol. */ |
| 1769 | if (h->root.type == bfd_link_hash_defined |
| 1770 | || h->root.type == bfd_link_hash_defweak) |
| 1771 | { |
| 1772 | asection *hsec; |
| 1773 | |
| 1774 | hsec = h->root.u.def.section; |
| 1775 | relocation = (h->root.u.def.value |
| 1776 | + hsec->output_section->vma |
| 1777 | + hsec->output_offset); |
| 1778 | } |
| 1779 | else |
| 1780 | { |
| 1781 | if (! ((*info->callbacks->undefined_symbol) |
| 1782 | (info, h->root.root.string, input_bfd, |
| 1783 | input_section, |
| 1784 | int_rel.r_vaddr - input_section->vma))) |
| 1785 | return false; |
| 1786 | relocation = 0; |
| 1787 | } |
| 1788 | } |
| 1789 | else |
| 1790 | { |
| 1791 | /* This is a reloc against a section. */ |
| 1792 | relocation = (s->output_section->vma |
| 1793 | + s->output_offset |
| 1794 | - s->vma); |
| 1795 | |
| 1796 | /* A PC relative reloc is already correct in the object |
| 1797 | file. Make it look like a pcrel_offset relocation by |
| 1798 | adding in the start address. */ |
| 1799 | if (howto->pc_relative) |
| 1800 | { |
| 1801 | if (int_rel.r_type != MIPS_R_RELHI || ! use_lo) |
| 1802 | relocation += int_rel.r_vaddr + adjust; |
| 1803 | else |
| 1804 | relocation += lo_int_rel.r_vaddr + adjust; |
| 1805 | } |
| 1806 | } |
| 1807 | |
| 1808 | if (int_rel.r_type != MIPS_R_REFHI |
| 1809 | && int_rel.r_type != MIPS_R_RELHI) |
| 1810 | r = _bfd_final_link_relocate (howto, |
| 1811 | input_bfd, |
| 1812 | input_section, |
| 1813 | contents, |
| 1814 | (int_rel.r_vaddr |
| 1815 | - input_section->vma |
| 1816 | + adjust), |
| 1817 | relocation, |
| 1818 | addend); |
| 1819 | else |
| 1820 | { |
| 1821 | mips_relocate_hi (&int_rel, |
| 1822 | use_lo ? &lo_int_rel : NULL, |
| 1823 | input_bfd, input_section, contents, adjust, |
| 1824 | relocation, |
| 1825 | int_rel.r_type == MIPS_R_RELHI); |
| 1826 | r = bfd_reloc_ok; |
| 1827 | } |
| 1828 | } |
| 1829 | |
| 1830 | /* MIPS_R_JMPADDR requires peculiar overflow detection. The |
| 1831 | instruction provides a 28 bit address (the two lower bits are |
| 1832 | implicit zeroes) which is combined with the upper four bits |
| 1833 | of the instruction address. */ |
| 1834 | if (r == bfd_reloc_ok |
| 1835 | && int_rel.r_type == MIPS_R_JMPADDR |
| 1836 | && (((relocation |
| 1837 | + addend |
| 1838 | + (int_rel.r_extern ? 0 : s->vma)) |
| 1839 | & 0xf0000000) |
| 1840 | != ((input_section->output_section->vma |
| 1841 | + input_section->output_offset |
| 1842 | + (int_rel.r_vaddr - input_section->vma) |
| 1843 | + adjust) |
| 1844 | & 0xf0000000))) |
| 1845 | r = bfd_reloc_overflow; |
| 1846 | |
| 1847 | if (r != bfd_reloc_ok) |
| 1848 | { |
| 1849 | switch (r) |
| 1850 | { |
| 1851 | default: |
| 1852 | case bfd_reloc_outofrange: |
| 1853 | abort (); |
| 1854 | case bfd_reloc_overflow: |
| 1855 | { |
| 1856 | const char *name; |
| 1857 | |
| 1858 | if (int_rel.r_extern) |
| 1859 | name = h->root.root.string; |
| 1860 | else |
| 1861 | name = bfd_section_name (input_bfd, s); |
| 1862 | if (! ((*info->callbacks->reloc_overflow) |
| 1863 | (info, name, howto->name, (bfd_vma) 0, |
| 1864 | input_bfd, input_section, |
| 1865 | int_rel.r_vaddr - input_section->vma))) |
| 1866 | return false; |
| 1867 | } |
| 1868 | break; |
| 1869 | } |
| 1870 | } |
| 1871 | } |
| 1872 | |
| 1873 | return true; |
| 1874 | } |
| 1875 | \f |
| 1876 | /* Read in the relocs for a section. */ |
| 1877 | |
| 1878 | static boolean |
| 1879 | mips_read_relocs (abfd, sec) |
| 1880 | bfd *abfd; |
| 1881 | asection *sec; |
| 1882 | { |
| 1883 | struct ecoff_section_tdata *section_tdata; |
| 1884 | |
| 1885 | section_tdata = ecoff_section_data (abfd, sec); |
| 1886 | if (section_tdata == (struct ecoff_section_tdata *) NULL) |
| 1887 | { |
| 1888 | sec->used_by_bfd = |
| 1889 | (PTR) bfd_alloc (abfd, sizeof (struct ecoff_section_tdata)); |
| 1890 | if (sec->used_by_bfd == NULL) |
| 1891 | return false; |
| 1892 | |
| 1893 | section_tdata = ecoff_section_data (abfd, sec); |
| 1894 | section_tdata->external_relocs = NULL; |
| 1895 | section_tdata->contents = NULL; |
| 1896 | section_tdata->offsets = NULL; |
| 1897 | } |
| 1898 | |
| 1899 | if (section_tdata->external_relocs == NULL) |
| 1900 | { |
| 1901 | bfd_size_type external_relocs_size; |
| 1902 | |
| 1903 | external_relocs_size = (ecoff_backend (abfd)->external_reloc_size |
| 1904 | * sec->reloc_count); |
| 1905 | |
| 1906 | section_tdata->external_relocs = |
| 1907 | (PTR) bfd_alloc (abfd, external_relocs_size); |
| 1908 | if (section_tdata->external_relocs == NULL && external_relocs_size != 0) |
| 1909 | return false; |
| 1910 | |
| 1911 | if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 |
| 1912 | || (bfd_read (section_tdata->external_relocs, 1, |
| 1913 | external_relocs_size, abfd) |
| 1914 | != external_relocs_size)) |
| 1915 | return false; |
| 1916 | } |
| 1917 | |
| 1918 | return true; |
| 1919 | } |
| 1920 | |
| 1921 | /* Relax a section when linking a MIPS ECOFF file. This is used for |
| 1922 | embedded PIC code, which always uses PC relative branches which |
| 1923 | only have an 18 bit range on MIPS. If a branch is not in range, we |
| 1924 | generate a long instruction sequence to compensate. Each time we |
| 1925 | find a branch to expand, we have to check all the others again to |
| 1926 | make sure they are still in range. This is slow, but it only has |
| 1927 | to be done when -relax is passed to the linker. |
| 1928 | |
| 1929 | This routine figures out which branches need to expand; the actual |
| 1930 | expansion is done in mips_relocate_section when the section |
| 1931 | contents are relocated. The information is stored in the offsets |
| 1932 | field of the ecoff_section_tdata structure. An offset of 1 means |
| 1933 | that the branch must be expanded into a multi-instruction PC |
| 1934 | relative branch (such an offset will only occur for a PC relative |
| 1935 | branch to an external symbol). Any other offset must be a multiple |
| 1936 | of four, and is the amount to change the branch by (such an offset |
| 1937 | will only occur for a PC relative branch within the same section). |
| 1938 | |
| 1939 | We do not modify the section relocs or contents themselves so that |
| 1940 | if memory usage becomes an issue we can discard them and read them |
| 1941 | again. The only information we must save in memory between this |
| 1942 | routine and the mips_relocate_section routine is the table of |
| 1943 | offsets. */ |
| 1944 | |
| 1945 | static boolean |
| 1946 | mips_relax_section (abfd, sec, info, again) |
| 1947 | bfd *abfd; |
| 1948 | asection *sec; |
| 1949 | struct bfd_link_info *info; |
| 1950 | boolean *again; |
| 1951 | { |
| 1952 | struct ecoff_section_tdata *section_tdata; |
| 1953 | bfd_byte *contents = NULL; |
| 1954 | long *offsets; |
| 1955 | struct external_reloc *ext_rel; |
| 1956 | struct external_reloc *ext_rel_end; |
| 1957 | unsigned int i; |
| 1958 | |
| 1959 | /* Assume we are not going to need another pass. */ |
| 1960 | *again = false; |
| 1961 | |
| 1962 | /* If we are not generating an ECOFF file, this is much too |
| 1963 | confusing to deal with. */ |
| 1964 | if (info->hash->creator->flavour != bfd_get_flavour (abfd)) |
| 1965 | return true; |
| 1966 | |
| 1967 | /* If there are no relocs, there is nothing to do. */ |
| 1968 | if (sec->reloc_count == 0) |
| 1969 | return true; |
| 1970 | |
| 1971 | /* We are only interested in PC relative relocs, and why would there |
| 1972 | ever be one from anything but the .text section? */ |
| 1973 | if (strcmp (bfd_get_section_name (abfd, sec), ".text") != 0) |
| 1974 | return true; |
| 1975 | |
| 1976 | /* Read in the relocs, if we haven't already got them. */ |
| 1977 | section_tdata = ecoff_section_data (abfd, sec); |
| 1978 | if (section_tdata == (struct ecoff_section_tdata *) NULL |
| 1979 | || section_tdata->external_relocs == NULL) |
| 1980 | { |
| 1981 | if (! mips_read_relocs (abfd, sec)) |
| 1982 | goto error_return; |
| 1983 | section_tdata = ecoff_section_data (abfd, sec); |
| 1984 | } |
| 1985 | |
| 1986 | if (sec->_cooked_size == 0) |
| 1987 | { |
| 1988 | /* We must initialize _cooked_size only the first time we are |
| 1989 | called. */ |
| 1990 | sec->_cooked_size = sec->_raw_size; |
| 1991 | } |
| 1992 | |
| 1993 | contents = section_tdata->contents; |
| 1994 | offsets = section_tdata->offsets; |
| 1995 | |
| 1996 | /* Look for any external PC relative relocs. Internal PC relative |
| 1997 | relocs are already correct in the object file, so they certainly |
| 1998 | can not overflow. */ |
| 1999 | ext_rel = (struct external_reloc *) section_tdata->external_relocs; |
| 2000 | ext_rel_end = ext_rel + sec->reloc_count; |
| 2001 | for (i = 0; ext_rel < ext_rel_end; ext_rel++, i++) |
| 2002 | { |
| 2003 | struct internal_reloc int_rel; |
| 2004 | struct ecoff_link_hash_entry *h; |
| 2005 | asection *hsec; |
| 2006 | bfd_signed_vma relocation; |
| 2007 | struct external_reloc *adj_ext_rel; |
| 2008 | unsigned int adj_i; |
| 2009 | unsigned long ext_count; |
| 2010 | struct ecoff_link_hash_entry **adj_h_ptr; |
| 2011 | struct ecoff_link_hash_entry **adj_h_ptr_end; |
| 2012 | struct ecoff_value_adjust *adjust; |
| 2013 | |
| 2014 | /* If we have already expanded this reloc, we certainly don't |
| 2015 | need to do it again. */ |
| 2016 | if (offsets != (long *) NULL && offsets[i] == 1) |
| 2017 | continue; |
| 2018 | |
| 2019 | /* Quickly check that this reloc is external PCREL16. */ |
| 2020 | if (bfd_header_big_endian (abfd)) |
| 2021 | { |
| 2022 | if ((ext_rel->r_bits[3] & RELOC_BITS3_EXTERN_BIG) == 0 |
| 2023 | || (((ext_rel->r_bits[3] & RELOC_BITS3_TYPE_BIG) |
| 2024 | >> RELOC_BITS3_TYPE_SH_BIG) |
| 2025 | != MIPS_R_PCREL16)) |
| 2026 | continue; |
| 2027 | } |
| 2028 | else |
| 2029 | { |
| 2030 | if ((ext_rel->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) == 0 |
| 2031 | || (((ext_rel->r_bits[3] & RELOC_BITS3_TYPE_LITTLE) |
| 2032 | >> RELOC_BITS3_TYPE_SH_LITTLE) |
| 2033 | != MIPS_R_PCREL16)) |
| 2034 | continue; |
| 2035 | } |
| 2036 | |
| 2037 | mips_ecoff_swap_reloc_in (abfd, (PTR) ext_rel, &int_rel); |
| 2038 | |
| 2039 | h = ecoff_data (abfd)->sym_hashes[int_rel.r_symndx]; |
| 2040 | if (h == (struct ecoff_link_hash_entry *) NULL) |
| 2041 | abort (); |
| 2042 | |
| 2043 | if (h->root.type != bfd_link_hash_defined |
| 2044 | && h->root.type != bfd_link_hash_defweak) |
| 2045 | { |
| 2046 | /* Just ignore undefined symbols. These will presumably |
| 2047 | generate an error later in the link. */ |
| 2048 | continue; |
| 2049 | } |
| 2050 | |
| 2051 | /* Get the value of the symbol. */ |
| 2052 | hsec = h->root.u.def.section; |
| 2053 | relocation = (h->root.u.def.value |
| 2054 | + hsec->output_section->vma |
| 2055 | + hsec->output_offset); |
| 2056 | |
| 2057 | /* Subtract out the current address. */ |
| 2058 | relocation -= (sec->output_section->vma |
| 2059 | + sec->output_offset |
| 2060 | + (int_rel.r_vaddr - sec->vma)); |
| 2061 | |
| 2062 | /* The addend is stored in the object file. In the normal case |
| 2063 | of ``bal symbol'', the addend will be -4. It will only be |
| 2064 | different in the case of ``bal symbol+constant''. To avoid |
| 2065 | always reading in the section contents, we don't check the |
| 2066 | addend in the object file (we could easily check the contents |
| 2067 | if we happen to have already read them in, but I fear that |
| 2068 | this could be confusing). This means we will screw up if |
| 2069 | there is a branch to a symbol that is in range, but added to |
| 2070 | a constant which puts it out of range; in such a case the |
| 2071 | link will fail with a reloc overflow error. Since the |
| 2072 | compiler will never generate such code, it should be easy |
| 2073 | enough to work around it by changing the assembly code in the |
| 2074 | source file. */ |
| 2075 | relocation -= 4; |
| 2076 | |
| 2077 | /* Now RELOCATION is the number we want to put in the object |
| 2078 | file. See whether it fits. */ |
| 2079 | if (relocation >= -0x20000 && relocation < 0x20000) |
| 2080 | continue; |
| 2081 | |
| 2082 | /* Now that we know this reloc needs work, which will rarely |
| 2083 | happen, go ahead and grab the section contents. */ |
| 2084 | if (contents == (bfd_byte *) NULL) |
| 2085 | { |
| 2086 | if (info->keep_memory) |
| 2087 | contents = (bfd_byte *) bfd_alloc (abfd, sec->_raw_size); |
| 2088 | else |
| 2089 | contents = (bfd_byte *) bfd_malloc ((size_t) sec->_raw_size); |
| 2090 | if (contents == (bfd_byte *) NULL) |
| 2091 | goto error_return; |
| 2092 | if (! bfd_get_section_contents (abfd, sec, (PTR) contents, |
| 2093 | (file_ptr) 0, sec->_raw_size)) |
| 2094 | goto error_return; |
| 2095 | if (info->keep_memory) |
| 2096 | section_tdata->contents = contents; |
| 2097 | } |
| 2098 | |
| 2099 | /* We only support changing the bal instruction. It would be |
| 2100 | possible to handle other PC relative branches, but some of |
| 2101 | them (the conditional branches) would require a different |
| 2102 | length instruction sequence which would complicate both this |
| 2103 | routine and mips_relax_pcrel16. It could be written if |
| 2104 | somebody felt it were important. Ignoring this reloc will |
| 2105 | presumably cause a reloc overflow error later on. */ |
| 2106 | if (bfd_get_32 (abfd, contents + int_rel.r_vaddr - sec->vma) |
| 2107 | != 0x0411ffff) /* bgezal $0,. == bal . */ |
| 2108 | continue; |
| 2109 | |
| 2110 | /* Bother. We need to expand this reloc, and we will need to |
| 2111 | make another relaxation pass since this change may put other |
| 2112 | relocs out of range. We need to examine the local branches |
| 2113 | and we need to allocate memory to hold the offsets we must |
| 2114 | add to them. We also need to adjust the values of all |
| 2115 | symbols in the object file following this location. */ |
| 2116 | |
| 2117 | sec->_cooked_size += PCREL16_EXPANSION_ADJUSTMENT; |
| 2118 | *again = true; |
| 2119 | |
| 2120 | if (offsets == (long *) NULL) |
| 2121 | { |
| 2122 | size_t size; |
| 2123 | |
| 2124 | size = sec->reloc_count * sizeof (long); |
| 2125 | offsets = (long *) bfd_alloc (abfd, size); |
| 2126 | if (offsets == (long *) NULL) |
| 2127 | goto error_return; |
| 2128 | memset (offsets, 0, size); |
| 2129 | section_tdata->offsets = offsets; |
| 2130 | } |
| 2131 | |
| 2132 | offsets[i] = 1; |
| 2133 | |
| 2134 | /* Now look for all PC relative references that cross this reloc |
| 2135 | and adjust their offsets. */ |
| 2136 | adj_ext_rel = (struct external_reloc *) section_tdata->external_relocs; |
| 2137 | for (adj_i = 0; adj_ext_rel < ext_rel_end; adj_ext_rel++, adj_i++) |
| 2138 | { |
| 2139 | struct internal_reloc adj_int_rel; |
| 2140 | bfd_vma start, stop; |
| 2141 | int change; |
| 2142 | |
| 2143 | mips_ecoff_swap_reloc_in (abfd, (PTR) adj_ext_rel, &adj_int_rel); |
| 2144 | |
| 2145 | if (adj_int_rel.r_type == MIPS_R_PCREL16) |
| 2146 | { |
| 2147 | unsigned long insn; |
| 2148 | |
| 2149 | /* We only care about local references. External ones |
| 2150 | will be relocated correctly anyhow. */ |
| 2151 | if (adj_int_rel.r_extern) |
| 2152 | continue; |
| 2153 | |
| 2154 | /* We are only interested in a PC relative reloc within |
| 2155 | this section. FIXME: Cross section PC relative |
| 2156 | relocs may not be handled correctly; does anybody |
| 2157 | care? */ |
| 2158 | if (adj_int_rel.r_symndx != RELOC_SECTION_TEXT) |
| 2159 | continue; |
| 2160 | |
| 2161 | start = adj_int_rel.r_vaddr; |
| 2162 | |
| 2163 | insn = bfd_get_32 (abfd, |
| 2164 | contents + adj_int_rel.r_vaddr - sec->vma); |
| 2165 | |
| 2166 | stop = (insn & 0xffff) << 2; |
| 2167 | if ((stop & 0x20000) != 0) |
| 2168 | stop -= 0x40000; |
| 2169 | stop += adj_int_rel.r_vaddr + 4; |
| 2170 | } |
| 2171 | else if (adj_int_rel.r_type == MIPS_R_RELHI) |
| 2172 | { |
| 2173 | struct internal_reloc rello; |
| 2174 | long addhi, addlo; |
| 2175 | |
| 2176 | /* The next reloc must be MIPS_R_RELLO, and we handle |
| 2177 | them together. */ |
| 2178 | BFD_ASSERT (adj_ext_rel + 1 < ext_rel_end); |
| 2179 | |
| 2180 | mips_ecoff_swap_reloc_in (abfd, (PTR) (adj_ext_rel + 1), &rello); |
| 2181 | |
| 2182 | BFD_ASSERT (rello.r_type == MIPS_R_RELLO); |
| 2183 | |
| 2184 | addhi = bfd_get_32 (abfd, |
| 2185 | contents + adj_int_rel.r_vaddr - sec->vma); |
| 2186 | addhi &= 0xffff; |
| 2187 | if (addhi & 0x8000) |
| 2188 | addhi -= 0x10000; |
| 2189 | addhi <<= 16; |
| 2190 | |
| 2191 | addlo = bfd_get_32 (abfd, contents + rello.r_vaddr - sec->vma); |
| 2192 | addlo &= 0xffff; |
| 2193 | if (addlo & 0x8000) |
| 2194 | addlo -= 0x10000; |
| 2195 | |
| 2196 | if (adj_int_rel.r_extern) |
| 2197 | { |
| 2198 | /* The value we want here is |
| 2199 | sym - RELLOaddr + addend |
| 2200 | which we can express as |
| 2201 | sym - (RELLOaddr - addend) |
| 2202 | Therefore if we are expanding the area between |
| 2203 | RELLOaddr and RELLOaddr - addend we must adjust |
| 2204 | the addend. This is admittedly ambiguous, since |
| 2205 | we might mean (sym + addend) - RELLOaddr, but in |
| 2206 | practice we don't, and there is no way to handle |
| 2207 | that case correctly since at this point we have |
| 2208 | no idea whether any reloc is being expanded |
| 2209 | between sym and sym + addend. */ |
| 2210 | start = rello.r_vaddr - (addhi + addlo); |
| 2211 | stop = rello.r_vaddr; |
| 2212 | } |
| 2213 | else |
| 2214 | { |
| 2215 | /* An internal RELHI/RELLO pair represents the |
| 2216 | difference between two addresses, $LC0 - foo. |
| 2217 | The symndx value is actually the difference |
| 2218 | between the reloc address and $LC0. This lets us |
| 2219 | compute $LC0, and, by considering the addend, |
| 2220 | foo. If the reloc we are expanding falls between |
| 2221 | those two relocs, we must adjust the addend. At |
| 2222 | this point, the symndx value is actually in the |
| 2223 | r_offset field, where it was put by |
| 2224 | mips_ecoff_swap_reloc_in. */ |
| 2225 | start = rello.r_vaddr - adj_int_rel.r_offset; |
| 2226 | stop = start + addhi + addlo; |
| 2227 | } |
| 2228 | } |
| 2229 | else if (adj_int_rel.r_type == MIPS_R_SWITCH) |
| 2230 | { |
| 2231 | /* A MIPS_R_SWITCH reloc represents a word of the form |
| 2232 | .word $L3-$LS12 |
| 2233 | The value in the object file is correct, assuming the |
| 2234 | original value of $L3. The symndx value is actually |
| 2235 | the difference between the reloc address and $LS12. |
| 2236 | This lets us compute the original value of $LS12 as |
| 2237 | vaddr - symndx |
| 2238 | and the original value of $L3 as |
| 2239 | vaddr - symndx + addend |
| 2240 | where addend is the value from the object file. At |
| 2241 | this point, the symndx value is actually found in the |
| 2242 | r_offset field, since it was moved by |
| 2243 | mips_ecoff_swap_reloc_in. */ |
| 2244 | start = adj_int_rel.r_vaddr - adj_int_rel.r_offset; |
| 2245 | stop = start + bfd_get_32 (abfd, |
| 2246 | (contents |
| 2247 | + adj_int_rel.r_vaddr |
| 2248 | - sec->vma)); |
| 2249 | } |
| 2250 | else |
| 2251 | continue; |
| 2252 | |
| 2253 | /* If the range expressed by this reloc, which is the |
| 2254 | distance between START and STOP crosses the reloc we are |
| 2255 | expanding, we must adjust the offset. The sign of the |
| 2256 | adjustment depends upon the direction in which the range |
| 2257 | crosses the reloc being expanded. */ |
| 2258 | if (start <= int_rel.r_vaddr && stop > int_rel.r_vaddr) |
| 2259 | change = PCREL16_EXPANSION_ADJUSTMENT; |
| 2260 | else if (start > int_rel.r_vaddr && stop <= int_rel.r_vaddr) |
| 2261 | change = - PCREL16_EXPANSION_ADJUSTMENT; |
| 2262 | else |
| 2263 | change = 0; |
| 2264 | |
| 2265 | offsets[adj_i] += change; |
| 2266 | |
| 2267 | if (adj_int_rel.r_type == MIPS_R_RELHI) |
| 2268 | { |
| 2269 | adj_ext_rel++; |
| 2270 | adj_i++; |
| 2271 | offsets[adj_i] += change; |
| 2272 | } |
| 2273 | } |
| 2274 | |
| 2275 | /* Find all symbols in this section defined by this object file |
| 2276 | and adjust their values. Note that we decide whether to |
| 2277 | adjust the value based on the value stored in the ECOFF EXTR |
| 2278 | structure, because the value stored in the hash table may |
| 2279 | have been changed by an earlier expanded reloc and thus may |
| 2280 | no longer correctly indicate whether the symbol is before or |
| 2281 | after the expanded reloc. */ |
| 2282 | ext_count = ecoff_data (abfd)->debug_info.symbolic_header.iextMax; |
| 2283 | adj_h_ptr = ecoff_data (abfd)->sym_hashes; |
| 2284 | adj_h_ptr_end = adj_h_ptr + ext_count; |
| 2285 | for (; adj_h_ptr < adj_h_ptr_end; adj_h_ptr++) |
| 2286 | { |
| 2287 | struct ecoff_link_hash_entry *adj_h; |
| 2288 | |
| 2289 | adj_h = *adj_h_ptr; |
| 2290 | if (adj_h != (struct ecoff_link_hash_entry *) NULL |
| 2291 | && (adj_h->root.type == bfd_link_hash_defined |
| 2292 | || adj_h->root.type == bfd_link_hash_defweak) |
| 2293 | && adj_h->root.u.def.section == sec |
| 2294 | && adj_h->esym.asym.value > int_rel.r_vaddr) |
| 2295 | adj_h->root.u.def.value += PCREL16_EXPANSION_ADJUSTMENT; |
| 2296 | } |
| 2297 | |
| 2298 | /* Add an entry to the symbol value adjust list. This is used |
| 2299 | by bfd_ecoff_debug_accumulate to adjust the values of |
| 2300 | internal symbols and FDR's. */ |
| 2301 | adjust = ((struct ecoff_value_adjust *) |
| 2302 | bfd_alloc (abfd, sizeof (struct ecoff_value_adjust))); |
| 2303 | if (adjust == (struct ecoff_value_adjust *) NULL) |
| 2304 | goto error_return; |
| 2305 | |
| 2306 | adjust->start = int_rel.r_vaddr; |
| 2307 | adjust->end = sec->vma + sec->_raw_size; |
| 2308 | adjust->adjust = PCREL16_EXPANSION_ADJUSTMENT; |
| 2309 | |
| 2310 | adjust->next = ecoff_data (abfd)->debug_info.adjust; |
| 2311 | ecoff_data (abfd)->debug_info.adjust = adjust; |
| 2312 | } |
| 2313 | |
| 2314 | if (contents != (bfd_byte *) NULL && ! info->keep_memory) |
| 2315 | free (contents); |
| 2316 | |
| 2317 | return true; |
| 2318 | |
| 2319 | error_return: |
| 2320 | if (contents != (bfd_byte *) NULL && ! info->keep_memory) |
| 2321 | free (contents); |
| 2322 | return false; |
| 2323 | } |
| 2324 | |
| 2325 | /* This routine is called from mips_relocate_section when a PC |
| 2326 | relative reloc must be expanded into the five instruction sequence. |
| 2327 | It handles all the details of the expansion, including resolving |
| 2328 | the reloc. */ |
| 2329 | |
| 2330 | static boolean |
| 2331 | mips_relax_pcrel16 (info, input_bfd, input_section, h, location, address) |
| 2332 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 2333 | bfd *input_bfd; |
| 2334 | asection *input_section ATTRIBUTE_UNUSED; |
| 2335 | struct ecoff_link_hash_entry *h; |
| 2336 | bfd_byte *location; |
| 2337 | bfd_vma address; |
| 2338 | { |
| 2339 | bfd_vma relocation; |
| 2340 | |
| 2341 | /* 0x0411ffff is bgezal $0,. == bal . */ |
| 2342 | BFD_ASSERT (bfd_get_32 (input_bfd, location) == 0x0411ffff); |
| 2343 | |
| 2344 | /* We need to compute the distance between the symbol and the |
| 2345 | current address plus eight. */ |
| 2346 | relocation = (h->root.u.def.value |
| 2347 | + h->root.u.def.section->output_section->vma |
| 2348 | + h->root.u.def.section->output_offset); |
| 2349 | relocation -= address + 8; |
| 2350 | |
| 2351 | /* If the lower half is negative, increment the upper 16 half. */ |
| 2352 | if ((relocation & 0x8000) != 0) |
| 2353 | relocation += 0x10000; |
| 2354 | |
| 2355 | bfd_put_32 (input_bfd, 0x04110001, location); /* bal .+8 */ |
| 2356 | bfd_put_32 (input_bfd, |
| 2357 | 0x3c010000 | ((relocation >> 16) & 0xffff), /* lui $at,XX */ |
| 2358 | location + 4); |
| 2359 | bfd_put_32 (input_bfd, |
| 2360 | 0x24210000 | (relocation & 0xffff), /* addiu $at,$at,XX */ |
| 2361 | location + 8); |
| 2362 | bfd_put_32 (input_bfd, 0x003f0821, location + 12); /* addu $at,$at,$ra */ |
| 2363 | bfd_put_32 (input_bfd, 0x0020f809, location + 16); /* jalr $at */ |
| 2364 | |
| 2365 | return true; |
| 2366 | } |
| 2367 | |
| 2368 | /* Given a .sdata section and a .rel.sdata in-memory section, store |
| 2369 | relocation information into the .rel.sdata section which can be |
| 2370 | used at runtime to relocate the section. This is called by the |
| 2371 | linker when the --embedded-relocs switch is used. This is called |
| 2372 | after the add_symbols entry point has been called for all the |
| 2373 | objects, and before the final_link entry point is called. This |
| 2374 | function presumes that the object was compiled using |
| 2375 | -membedded-pic. */ |
| 2376 | |
| 2377 | boolean |
| 2378 | bfd_mips_ecoff_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
| 2379 | bfd *abfd; |
| 2380 | struct bfd_link_info *info; |
| 2381 | asection *datasec; |
| 2382 | asection *relsec; |
| 2383 | char **errmsg; |
| 2384 | { |
| 2385 | struct ecoff_link_hash_entry **sym_hashes; |
| 2386 | struct ecoff_section_tdata *section_tdata; |
| 2387 | struct external_reloc *ext_rel; |
| 2388 | struct external_reloc *ext_rel_end; |
| 2389 | bfd_byte *p; |
| 2390 | |
| 2391 | BFD_ASSERT (! info->relocateable); |
| 2392 | |
| 2393 | *errmsg = NULL; |
| 2394 | |
| 2395 | if (datasec->reloc_count == 0) |
| 2396 | return true; |
| 2397 | |
| 2398 | sym_hashes = ecoff_data (abfd)->sym_hashes; |
| 2399 | |
| 2400 | if (! mips_read_relocs (abfd, datasec)) |
| 2401 | return false; |
| 2402 | |
| 2403 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, datasec->reloc_count * 4); |
| 2404 | if (relsec->contents == NULL) |
| 2405 | return false; |
| 2406 | |
| 2407 | p = relsec->contents; |
| 2408 | |
| 2409 | section_tdata = ecoff_section_data (abfd, datasec); |
| 2410 | ext_rel = (struct external_reloc *) section_tdata->external_relocs; |
| 2411 | ext_rel_end = ext_rel + datasec->reloc_count; |
| 2412 | for (; ext_rel < ext_rel_end; ext_rel++, p += 4) |
| 2413 | { |
| 2414 | struct internal_reloc int_rel; |
| 2415 | boolean text_relative; |
| 2416 | |
| 2417 | mips_ecoff_swap_reloc_in (abfd, (PTR) ext_rel, &int_rel); |
| 2418 | |
| 2419 | /* We are going to write a four byte word into the runtime reloc |
| 2420 | section. The word will be the address in the data section |
| 2421 | which must be relocated. This must be on a word boundary, |
| 2422 | which means the lower two bits must be zero. We use the |
| 2423 | least significant bit to indicate how the value in the data |
| 2424 | section must be relocated. A 0 means that the value is |
| 2425 | relative to the text section, while a 1 indicates that the |
| 2426 | value is relative to the data section. Given that we are |
| 2427 | assuming the code was compiled using -membedded-pic, there |
| 2428 | should not be any other possibilities. */ |
| 2429 | |
| 2430 | /* We can only relocate REFWORD relocs at run time. */ |
| 2431 | if (int_rel.r_type != MIPS_R_REFWORD) |
| 2432 | { |
| 2433 | *errmsg = _("unsupported reloc type"); |
| 2434 | bfd_set_error (bfd_error_bad_value); |
| 2435 | return false; |
| 2436 | } |
| 2437 | |
| 2438 | if (int_rel.r_extern) |
| 2439 | { |
| 2440 | struct ecoff_link_hash_entry *h; |
| 2441 | |
| 2442 | h = sym_hashes[int_rel.r_symndx]; |
| 2443 | /* If h is NULL, that means that there is a reloc against an |
| 2444 | external symbol which we thought was just a debugging |
| 2445 | symbol. This should not happen. */ |
| 2446 | if (h == (struct ecoff_link_hash_entry *) NULL) |
| 2447 | abort (); |
| 2448 | if ((h->root.type == bfd_link_hash_defined |
| 2449 | || h->root.type == bfd_link_hash_defweak) |
| 2450 | && (h->root.u.def.section->flags & SEC_CODE) != 0) |
| 2451 | text_relative = true; |
| 2452 | else |
| 2453 | text_relative = false; |
| 2454 | } |
| 2455 | else |
| 2456 | { |
| 2457 | switch (int_rel.r_symndx) |
| 2458 | { |
| 2459 | case RELOC_SECTION_TEXT: |
| 2460 | text_relative = true; |
| 2461 | break; |
| 2462 | case RELOC_SECTION_SDATA: |
| 2463 | case RELOC_SECTION_SBSS: |
| 2464 | case RELOC_SECTION_LIT8: |
| 2465 | text_relative = false; |
| 2466 | break; |
| 2467 | default: |
| 2468 | /* No other sections should appear in -membedded-pic |
| 2469 | code. */ |
| 2470 | *errmsg = _("reloc against unsupported section"); |
| 2471 | bfd_set_error (bfd_error_bad_value); |
| 2472 | return false; |
| 2473 | } |
| 2474 | } |
| 2475 | |
| 2476 | if ((int_rel.r_offset & 3) != 0) |
| 2477 | { |
| 2478 | *errmsg = _("reloc not properly aligned"); |
| 2479 | bfd_set_error (bfd_error_bad_value); |
| 2480 | return false; |
| 2481 | } |
| 2482 | |
| 2483 | bfd_put_32 (abfd, |
| 2484 | (int_rel.r_vaddr - datasec->vma + datasec->output_offset |
| 2485 | + (text_relative ? 0 : 1)), |
| 2486 | p); |
| 2487 | } |
| 2488 | |
| 2489 | return true; |
| 2490 | } |
| 2491 | \f |
| 2492 | /* This is the ECOFF backend structure. The backend field of the |
| 2493 | target vector points to this. */ |
| 2494 | |
| 2495 | static const struct ecoff_backend_data mips_ecoff_backend_data = |
| 2496 | { |
| 2497 | /* COFF backend structure. */ |
| 2498 | { |
| 2499 | (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */ |
| 2500 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ |
| 2501 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ |
| 2502 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/ |
| 2503 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ |
| 2504 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ |
| 2505 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ |
| 2506 | mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out, |
| 2507 | mips_ecoff_swap_scnhdr_out, |
| 2508 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, true, false, 4, |
| 2509 | mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in, |
| 2510 | mips_ecoff_swap_scnhdr_in, NULL, |
| 2511 | mips_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook, |
| 2512 | _bfd_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags, |
| 2513 | _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table, |
| 2514 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 2515 | NULL, NULL |
| 2516 | }, |
| 2517 | /* Supported architecture. */ |
| 2518 | bfd_arch_mips, |
| 2519 | /* Initial portion of armap string. */ |
| 2520 | "__________", |
| 2521 | /* The page boundary used to align sections in a demand-paged |
| 2522 | executable file. E.g., 0x1000. */ |
| 2523 | 0x1000, |
| 2524 | /* True if the .rdata section is part of the text segment, as on the |
| 2525 | Alpha. False if .rdata is part of the data segment, as on the |
| 2526 | MIPS. */ |
| 2527 | false, |
| 2528 | /* Bitsize of constructor entries. */ |
| 2529 | 32, |
| 2530 | /* Reloc to use for constructor entries. */ |
| 2531 | &mips_howto_table[MIPS_R_REFWORD], |
| 2532 | { |
| 2533 | /* Symbol table magic number. */ |
| 2534 | magicSym, |
| 2535 | /* Alignment of debugging information. E.g., 4. */ |
| 2536 | 4, |
| 2537 | /* Sizes of external symbolic information. */ |
| 2538 | sizeof (struct hdr_ext), |
| 2539 | sizeof (struct dnr_ext), |
| 2540 | sizeof (struct pdr_ext), |
| 2541 | sizeof (struct sym_ext), |
| 2542 | sizeof (struct opt_ext), |
| 2543 | sizeof (struct fdr_ext), |
| 2544 | sizeof (struct rfd_ext), |
| 2545 | sizeof (struct ext_ext), |
| 2546 | /* Functions to swap in external symbolic data. */ |
| 2547 | ecoff_swap_hdr_in, |
| 2548 | ecoff_swap_dnr_in, |
| 2549 | ecoff_swap_pdr_in, |
| 2550 | ecoff_swap_sym_in, |
| 2551 | ecoff_swap_opt_in, |
| 2552 | ecoff_swap_fdr_in, |
| 2553 | ecoff_swap_rfd_in, |
| 2554 | ecoff_swap_ext_in, |
| 2555 | _bfd_ecoff_swap_tir_in, |
| 2556 | _bfd_ecoff_swap_rndx_in, |
| 2557 | /* Functions to swap out external symbolic data. */ |
| 2558 | ecoff_swap_hdr_out, |
| 2559 | ecoff_swap_dnr_out, |
| 2560 | ecoff_swap_pdr_out, |
| 2561 | ecoff_swap_sym_out, |
| 2562 | ecoff_swap_opt_out, |
| 2563 | ecoff_swap_fdr_out, |
| 2564 | ecoff_swap_rfd_out, |
| 2565 | ecoff_swap_ext_out, |
| 2566 | _bfd_ecoff_swap_tir_out, |
| 2567 | _bfd_ecoff_swap_rndx_out, |
| 2568 | /* Function to read in symbolic data. */ |
| 2569 | _bfd_ecoff_slurp_symbolic_info |
| 2570 | }, |
| 2571 | /* External reloc size. */ |
| 2572 | RELSZ, |
| 2573 | /* Reloc swapping functions. */ |
| 2574 | mips_ecoff_swap_reloc_in, |
| 2575 | mips_ecoff_swap_reloc_out, |
| 2576 | /* Backend reloc tweaking. */ |
| 2577 | mips_adjust_reloc_in, |
| 2578 | mips_adjust_reloc_out, |
| 2579 | /* Relocate section contents while linking. */ |
| 2580 | mips_relocate_section, |
| 2581 | /* Do final adjustments to filehdr and aouthdr. */ |
| 2582 | NULL, |
| 2583 | /* Read an element from an archive at a given file position. */ |
| 2584 | _bfd_get_elt_at_filepos |
| 2585 | }; |
| 2586 | |
| 2587 | /* Looking up a reloc type is MIPS specific. */ |
| 2588 | #define _bfd_ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup |
| 2589 | |
| 2590 | /* Getting relocated section contents is generic. */ |
| 2591 | #define _bfd_ecoff_bfd_get_relocated_section_contents \ |
| 2592 | bfd_generic_get_relocated_section_contents |
| 2593 | |
| 2594 | /* Handling file windows is generic. */ |
| 2595 | #define _bfd_ecoff_get_section_contents_in_window \ |
| 2596 | _bfd_generic_get_section_contents_in_window |
| 2597 | |
| 2598 | /* Relaxing sections is MIPS specific. */ |
| 2599 | #define _bfd_ecoff_bfd_relax_section mips_relax_section |
| 2600 | |
| 2601 | /* GC of sections is not done. */ |
| 2602 | #define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections |
| 2603 | |
| 2604 | extern const bfd_target ecoff_big_vec; |
| 2605 | |
| 2606 | const bfd_target ecoff_little_vec = |
| 2607 | { |
| 2608 | "ecoff-littlemips", /* name */ |
| 2609 | bfd_target_ecoff_flavour, |
| 2610 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 2611 | BFD_ENDIAN_LITTLE, /* header byte order is little */ |
| 2612 | |
| 2613 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 2614 | HAS_LINENO | HAS_DEBUG | |
| 2615 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 2616 | |
| 2617 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 2618 | 0, /* leading underscore */ |
| 2619 | ' ', /* ar_pad_char */ |
| 2620 | 15, /* ar_max_namelen */ |
| 2621 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 2622 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 2623 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 2624 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 2625 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 2626 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 2627 | |
| 2628 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 2629 | _bfd_ecoff_archive_p, _bfd_dummy_target}, |
| 2630 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ |
| 2631 | _bfd_generic_mkarchive, bfd_false}, |
| 2632 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ |
| 2633 | _bfd_write_archive_contents, bfd_false}, |
| 2634 | |
| 2635 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), |
| 2636 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), |
| 2637 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 2638 | BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff), |
| 2639 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), |
| 2640 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), |
| 2641 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), |
| 2642 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), |
| 2643 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 2644 | |
| 2645 | & ecoff_big_vec, |
| 2646 | |
| 2647 | (PTR) &mips_ecoff_backend_data |
| 2648 | }; |
| 2649 | |
| 2650 | const bfd_target ecoff_big_vec = |
| 2651 | { |
| 2652 | "ecoff-bigmips", /* name */ |
| 2653 | bfd_target_ecoff_flavour, |
| 2654 | BFD_ENDIAN_BIG, /* data byte order is big */ |
| 2655 | BFD_ENDIAN_BIG, /* header byte order is big */ |
| 2656 | |
| 2657 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 2658 | HAS_LINENO | HAS_DEBUG | |
| 2659 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 2660 | |
| 2661 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 2662 | 0, /* leading underscore */ |
| 2663 | ' ', /* ar_pad_char */ |
| 2664 | 15, /* ar_max_namelen */ |
| 2665 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 2666 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 2667 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, |
| 2668 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 2669 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 2670 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, |
| 2671 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 2672 | _bfd_ecoff_archive_p, _bfd_dummy_target}, |
| 2673 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ |
| 2674 | _bfd_generic_mkarchive, bfd_false}, |
| 2675 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ |
| 2676 | _bfd_write_archive_contents, bfd_false}, |
| 2677 | |
| 2678 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), |
| 2679 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), |
| 2680 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 2681 | BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff), |
| 2682 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), |
| 2683 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), |
| 2684 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), |
| 2685 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), |
| 2686 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 2687 | |
| 2688 | & ecoff_little_vec, |
| 2689 | |
| 2690 | (PTR) &mips_ecoff_backend_data |
| 2691 | }; |
| 2692 | |
| 2693 | const bfd_target ecoff_biglittle_vec = |
| 2694 | { |
| 2695 | "ecoff-biglittlemips", /* name */ |
| 2696 | bfd_target_ecoff_flavour, |
| 2697 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 2698 | BFD_ENDIAN_BIG, /* header byte order is big */ |
| 2699 | |
| 2700 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 2701 | HAS_LINENO | HAS_DEBUG | |
| 2702 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 2703 | |
| 2704 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 2705 | 0, /* leading underscore */ |
| 2706 | ' ', /* ar_pad_char */ |
| 2707 | 15, /* ar_max_namelen */ |
| 2708 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 2709 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 2710 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 2711 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 2712 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 2713 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ |
| 2714 | |
| 2715 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 2716 | _bfd_ecoff_archive_p, _bfd_dummy_target}, |
| 2717 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ |
| 2718 | _bfd_generic_mkarchive, bfd_false}, |
| 2719 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ |
| 2720 | _bfd_write_archive_contents, bfd_false}, |
| 2721 | |
| 2722 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), |
| 2723 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), |
| 2724 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 2725 | BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff), |
| 2726 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), |
| 2727 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), |
| 2728 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), |
| 2729 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), |
| 2730 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 2731 | |
| 2732 | NULL, |
| 2733 | |
| 2734 | (PTR) &mips_ecoff_backend_data |
| 2735 | }; |