| 1 | /* BFD back-end for Intel 960 b.out binaries. |
| 2 | Copyright (C) 1990-2017 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "bfdlink.h" |
| 26 | #include "genlink.h" |
| 27 | #include "bout.h" |
| 28 | #include "libiberty.h" |
| 29 | |
| 30 | #include "aout/stab_gnu.h" |
| 31 | #include "libaout.h" /* BFD a.out internal data structures. */ |
| 32 | |
| 33 | #define ABS32CODE 0 |
| 34 | #define ABS32CODE_SHRUNK 1 |
| 35 | #define PCREL24 2 |
| 36 | #define CALLJ 3 |
| 37 | #define ABS32 4 |
| 38 | #define PCREL13 5 |
| 39 | #define ABS32_MAYBE_RELAXABLE 1 |
| 40 | #define ABS32_WAS_RELAXABLE 2 |
| 41 | |
| 42 | #define ALIGNER 10 |
| 43 | #define ALIGNDONE 11 |
| 44 | |
| 45 | static reloc_howto_type howto_reloc_callj = |
| 46 | HOWTO (CALLJ, 0, 2, 24, TRUE, 0, complain_overflow_signed, 0,"callj", TRUE, 0x00ffffff, 0x00ffffff,FALSE); |
| 47 | static reloc_howto_type howto_reloc_abs32 = |
| 48 | HOWTO (ABS32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"abs32", TRUE, 0xffffffff,0xffffffff,FALSE); |
| 49 | static reloc_howto_type howto_reloc_pcrel24 = |
| 50 | HOWTO (PCREL24, 0, 2, 24, TRUE, 0, complain_overflow_signed,0,"pcrel24", TRUE, 0x00ffffff,0x00ffffff,FALSE); |
| 51 | static reloc_howto_type howto_reloc_pcrel13 = |
| 52 | HOWTO (PCREL13, 0, 2, 13, TRUE, 0, complain_overflow_signed,0,"pcrel13", TRUE, 0x00001fff,0x00001fff,FALSE); |
| 53 | static reloc_howto_type howto_reloc_abs32codeshrunk = |
| 54 | HOWTO (ABS32CODE_SHRUNK, 0, 2, 24, TRUE, 0, complain_overflow_signed, 0,"callx->callj", TRUE, 0x00ffffff, 0x00ffffff,FALSE); |
| 55 | static reloc_howto_type howto_reloc_abs32code = |
| 56 | HOWTO (ABS32CODE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"callx", TRUE, 0xffffffff,0xffffffff,FALSE); |
| 57 | |
| 58 | static reloc_howto_type howto_align_table[] = |
| 59 | { |
| 60 | HOWTO (ALIGNER, 0, 0x1, 0, FALSE, 0, complain_overflow_dont, 0, "align16", FALSE, 0, 0, FALSE), |
| 61 | HOWTO (ALIGNER, 0, 0x3, 0, FALSE, 0, complain_overflow_dont, 0, "align32", FALSE, 0, 0, FALSE), |
| 62 | HOWTO (ALIGNER, 0, 0x7, 0, FALSE, 0, complain_overflow_dont, 0, "align64", FALSE, 0, 0, FALSE), |
| 63 | HOWTO (ALIGNER, 0, 0xf, 0, FALSE, 0, complain_overflow_dont, 0, "align128", FALSE, 0, 0, FALSE), |
| 64 | }; |
| 65 | |
| 66 | static reloc_howto_type howto_done_align_table[] = |
| 67 | { |
| 68 | HOWTO (ALIGNDONE, 0x1, 0x1, 0, FALSE, 0, complain_overflow_dont, 0, "donealign16", FALSE, 0, 0, FALSE), |
| 69 | HOWTO (ALIGNDONE, 0x3, 0x3, 0, FALSE, 0, complain_overflow_dont, 0, "donealign32", FALSE, 0, 0, FALSE), |
| 70 | HOWTO (ALIGNDONE, 0x7, 0x7, 0, FALSE, 0, complain_overflow_dont, 0, "donealign64", FALSE, 0, 0, FALSE), |
| 71 | HOWTO (ALIGNDONE, 0xf, 0xf, 0, FALSE, 0, complain_overflow_dont, 0, "donealign128", FALSE, 0, 0, FALSE), |
| 72 | }; |
| 73 | |
| 74 | /* Swaps the information in an executable header taken from a raw byte |
| 75 | stream memory image, into the internal exec_header structure. */ |
| 76 | |
| 77 | static void |
| 78 | bout_swap_exec_header_in (bfd *abfd, |
| 79 | struct external_exec *bytes, |
| 80 | struct internal_exec *execp) |
| 81 | { |
| 82 | /* Now fill in fields in the execp, from the bytes in the raw data. */ |
| 83 | execp->a_info = H_GET_32 (abfd, bytes->e_info); |
| 84 | execp->a_text = GET_WORD (abfd, bytes->e_text); |
| 85 | execp->a_data = GET_WORD (abfd, bytes->e_data); |
| 86 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); |
| 87 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); |
| 88 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); |
| 89 | execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); |
| 90 | execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); |
| 91 | execp->a_tload = GET_WORD (abfd, bytes->e_tload); |
| 92 | execp->a_dload = GET_WORD (abfd, bytes->e_dload); |
| 93 | execp->a_talign = bytes->e_talign[0]; |
| 94 | execp->a_dalign = bytes->e_dalign[0]; |
| 95 | execp->a_balign = bytes->e_balign[0]; |
| 96 | execp->a_relaxable = bytes->e_relaxable[0]; |
| 97 | } |
| 98 | |
| 99 | /* Swaps the information in an internal exec header structure into the |
| 100 | supplied buffer ready for writing to disk. */ |
| 101 | |
| 102 | static void |
| 103 | bout_swap_exec_header_out (bfd *abfd, |
| 104 | struct internal_exec *execp, |
| 105 | struct external_exec *bytes) |
| 106 | { |
| 107 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ |
| 108 | H_PUT_32 (abfd, execp->a_info , bytes->e_info); |
| 109 | PUT_WORD (abfd, execp->a_text , bytes->e_text); |
| 110 | PUT_WORD (abfd, execp->a_data , bytes->e_data); |
| 111 | PUT_WORD (abfd, execp->a_bss , bytes->e_bss); |
| 112 | PUT_WORD (abfd, execp->a_syms , bytes->e_syms); |
| 113 | PUT_WORD (abfd, execp->a_entry , bytes->e_entry); |
| 114 | PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); |
| 115 | PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); |
| 116 | PUT_WORD (abfd, execp->a_tload , bytes->e_tload); |
| 117 | PUT_WORD (abfd, execp->a_dload , bytes->e_dload); |
| 118 | bytes->e_talign[0] = execp->a_talign; |
| 119 | bytes->e_dalign[0] = execp->a_dalign; |
| 120 | bytes->e_balign[0] = execp->a_balign; |
| 121 | bytes->e_relaxable[0] = execp->a_relaxable; |
| 122 | } |
| 123 | |
| 124 | /* Finish up the opening of a b.out file for reading. Fill in all the |
| 125 | fields that are not handled by common code. */ |
| 126 | |
| 127 | static const bfd_target * |
| 128 | b_out_callback (bfd *abfd) |
| 129 | { |
| 130 | struct internal_exec *execp = exec_hdr (abfd); |
| 131 | unsigned long bss_start; |
| 132 | |
| 133 | /* Architecture and machine type. */ |
| 134 | bfd_set_arch_mach (abfd, |
| 135 | bfd_arch_i960, /* B.out only used on i960. */ |
| 136 | bfd_mach_i960_core /* Default. */ |
| 137 | ); |
| 138 | |
| 139 | /* The positions of the string table and symbol table. */ |
| 140 | obj_str_filepos (abfd) = N_STROFF (execp); |
| 141 | obj_sym_filepos (abfd) = N_SYMOFF (execp); |
| 142 | |
| 143 | /* The alignments of the sections. */ |
| 144 | obj_textsec (abfd)->alignment_power = execp->a_talign; |
| 145 | obj_datasec (abfd)->alignment_power = execp->a_dalign; |
| 146 | obj_bsssec (abfd)->alignment_power = execp->a_balign; |
| 147 | |
| 148 | /* The starting addresses of the sections. */ |
| 149 | obj_textsec (abfd)->vma = execp->a_tload; |
| 150 | obj_datasec (abfd)->vma = execp->a_dload; |
| 151 | |
| 152 | obj_textsec (abfd)->lma = obj_textsec (abfd)->vma; |
| 153 | obj_datasec (abfd)->lma = obj_datasec (abfd)->vma; |
| 154 | |
| 155 | /* And reload the sizes, since the aout module zaps them. */ |
| 156 | obj_textsec (abfd)->size = execp->a_text; |
| 157 | |
| 158 | bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */ |
| 159 | obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); |
| 160 | |
| 161 | obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma; |
| 162 | |
| 163 | /* The file positions of the sections. */ |
| 164 | obj_textsec (abfd)->filepos = N_TXTOFF (execp); |
| 165 | obj_datasec (abfd)->filepos = N_DATOFF (execp); |
| 166 | |
| 167 | /* The file positions of the relocation info. */ |
| 168 | obj_textsec (abfd)->rel_filepos = N_TROFF (execp); |
| 169 | obj_datasec (abfd)->rel_filepos = N_DROFF (execp); |
| 170 | |
| 171 | adata (abfd).page_size = 1; /* Not applicable. */ |
| 172 | adata (abfd).segment_size = 1; /* Not applicable. */ |
| 173 | adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE; |
| 174 | |
| 175 | if (execp->a_relaxable) |
| 176 | abfd->flags |= BFD_IS_RELAXABLE; |
| 177 | return abfd->xvec; |
| 178 | } |
| 179 | |
| 180 | static const bfd_target * |
| 181 | b_out_object_p (bfd *abfd) |
| 182 | { |
| 183 | struct internal_exec anexec; |
| 184 | struct external_exec exec_bytes; |
| 185 | bfd_size_type amt = EXEC_BYTES_SIZE; |
| 186 | |
| 187 | if (bfd_bread ((void *) &exec_bytes, amt, abfd) != amt) |
| 188 | { |
| 189 | if (bfd_get_error () != bfd_error_system_call) |
| 190 | bfd_set_error (bfd_error_wrong_format); |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | anexec.a_info = H_GET_32 (abfd, exec_bytes.e_info); |
| 195 | |
| 196 | if (N_BADMAG (&anexec)) |
| 197 | { |
| 198 | bfd_set_error (bfd_error_wrong_format); |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | bout_swap_exec_header_in (abfd, &exec_bytes, &anexec); |
| 203 | return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback); |
| 204 | } |
| 205 | |
| 206 | struct bout_data_struct |
| 207 | { |
| 208 | struct aoutdata a; |
| 209 | struct internal_exec e; |
| 210 | }; |
| 211 | |
| 212 | static bfd_boolean |
| 213 | b_out_mkobject (bfd *abfd) |
| 214 | { |
| 215 | struct bout_data_struct *rawptr; |
| 216 | bfd_size_type amt = sizeof (struct bout_data_struct); |
| 217 | |
| 218 | rawptr = bfd_zalloc (abfd, amt); |
| 219 | if (rawptr == NULL) |
| 220 | return FALSE; |
| 221 | |
| 222 | abfd->tdata.bout_data = rawptr; |
| 223 | exec_hdr (abfd) = &rawptr->e; |
| 224 | |
| 225 | obj_textsec (abfd) = NULL; |
| 226 | obj_datasec (abfd) = NULL; |
| 227 | obj_bsssec (abfd) = NULL; |
| 228 | |
| 229 | return TRUE; |
| 230 | } |
| 231 | |
| 232 | static int |
| 233 | b_out_symbol_cmp (const void * a_ptr, const void * b_ptr) |
| 234 | { |
| 235 | struct aout_symbol ** a = (struct aout_symbol **) a_ptr; |
| 236 | struct aout_symbol ** b = (struct aout_symbol **) b_ptr; |
| 237 | asection *sec; |
| 238 | bfd_vma av, bv; |
| 239 | |
| 240 | /* Primary key is address. */ |
| 241 | sec = bfd_get_section (&(*a)->symbol); |
| 242 | av = sec->output_section->vma + sec->output_offset + (*a)->symbol.value; |
| 243 | sec = bfd_get_section (&(*b)->symbol); |
| 244 | bv = sec->output_section->vma + sec->output_offset + (*b)->symbol.value; |
| 245 | |
| 246 | if (av < bv) |
| 247 | return -1; |
| 248 | if (av > bv) |
| 249 | return 1; |
| 250 | |
| 251 | /* Secondary key puts CALLNAME syms last and BALNAME syms first, |
| 252 | so that they have the best chance of being contiguous. */ |
| 253 | if (IS_BALNAME ((*a)->other) || IS_CALLNAME ((*b)->other)) |
| 254 | return -1; |
| 255 | if (IS_CALLNAME ((*a)->other) || IS_BALNAME ((*b)->other)) |
| 256 | return 1; |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static bfd_boolean |
| 262 | b_out_squirt_out_relocs (bfd *abfd, asection *section) |
| 263 | { |
| 264 | arelent **generic; |
| 265 | int r_extern = 0; |
| 266 | int r_idx; |
| 267 | int incode_mask; |
| 268 | int len_1; |
| 269 | unsigned int count = section->reloc_count; |
| 270 | struct relocation_info *native, *natptr; |
| 271 | bfd_size_type natsize; |
| 272 | int extern_mask, pcrel_mask, len_2, callj_mask; |
| 273 | |
| 274 | if (count == 0) |
| 275 | return TRUE; |
| 276 | |
| 277 | generic = section->orelocation; |
| 278 | natsize = (bfd_size_type) count * sizeof (struct relocation_info); |
| 279 | native = bfd_malloc (natsize); |
| 280 | if (!native && natsize != 0) |
| 281 | return FALSE; |
| 282 | |
| 283 | if (bfd_header_big_endian (abfd)) |
| 284 | { |
| 285 | /* Big-endian bit field allocation order. */ |
| 286 | pcrel_mask = 0x80; |
| 287 | extern_mask = 0x10; |
| 288 | len_2 = 0x40; |
| 289 | len_1 = 0x20; |
| 290 | callj_mask = 0x02; |
| 291 | incode_mask = 0x08; |
| 292 | } |
| 293 | else |
| 294 | { |
| 295 | /* Little-endian bit field allocation order. */ |
| 296 | pcrel_mask = 0x01; |
| 297 | extern_mask = 0x08; |
| 298 | len_2 = 0x04; |
| 299 | len_1 = 0x02; |
| 300 | callj_mask = 0x40; |
| 301 | incode_mask = 0x10; |
| 302 | } |
| 303 | |
| 304 | for (natptr = native; count > 0; --count, ++natptr, ++generic) |
| 305 | { |
| 306 | arelent *g = *generic; |
| 307 | unsigned char *raw = (unsigned char *) natptr; |
| 308 | asymbol *sym = *(g->sym_ptr_ptr); |
| 309 | asection *output_section = sym->section->output_section; |
| 310 | |
| 311 | H_PUT_32 (abfd, g->address, raw); |
| 312 | /* Find a type in the output format which matches the input howto - |
| 313 | at the moment we assume input format == output format FIXME!! */ |
| 314 | r_idx = 0; |
| 315 | /* FIXME: Need callj stuff here, and to check the howto entries to |
| 316 | be sure they are real for this architecture. */ |
| 317 | if (g->howto== &howto_reloc_callj) |
| 318 | raw[7] = callj_mask + pcrel_mask + len_2; |
| 319 | else if (g->howto == &howto_reloc_pcrel24) |
| 320 | raw[7] = pcrel_mask + len_2; |
| 321 | else if (g->howto == &howto_reloc_pcrel13) |
| 322 | raw[7] = pcrel_mask + len_1; |
| 323 | else if (g->howto == &howto_reloc_abs32code) |
| 324 | raw[7] = len_2 + incode_mask; |
| 325 | else if (g->howto >= howto_align_table |
| 326 | && g->howto <= (howto_align_table + ARRAY_SIZE (howto_align_table) - 1)) |
| 327 | { |
| 328 | /* symnum == -2; extern_mask not set, pcrel_mask set. */ |
| 329 | r_idx = -2; |
| 330 | r_extern = 0; |
| 331 | raw[7] = (pcrel_mask |
| 332 | | ((g->howto - howto_align_table) << 1)); |
| 333 | } |
| 334 | else |
| 335 | raw[7] = len_2; |
| 336 | |
| 337 | if (r_idx != 0) |
| 338 | /* Already mucked with r_extern, r_idx. */; |
| 339 | else if (bfd_is_com_section (output_section) |
| 340 | || bfd_is_abs_section (output_section) |
| 341 | || bfd_is_und_section (output_section)) |
| 342 | { |
| 343 | if (bfd_abs_section_ptr->symbol == sym) |
| 344 | { |
| 345 | /* Whoops, looked like an abs symbol, but is really an offset |
| 346 | from the abs section. */ |
| 347 | r_idx = 0; |
| 348 | r_extern = 0; |
| 349 | } |
| 350 | else |
| 351 | { |
| 352 | /* Fill in symbol. */ |
| 353 | r_extern = 1; |
| 354 | r_idx = (*g->sym_ptr_ptr)->udata.i; |
| 355 | } |
| 356 | } |
| 357 | else |
| 358 | { |
| 359 | /* Just an ordinary section. */ |
| 360 | r_extern = 0; |
| 361 | r_idx = output_section->target_index; |
| 362 | } |
| 363 | |
| 364 | if (bfd_header_big_endian (abfd)) |
| 365 | { |
| 366 | raw[4] = (unsigned char) (r_idx >> 16); |
| 367 | raw[5] = (unsigned char) (r_idx >> 8); |
| 368 | raw[6] = (unsigned char) (r_idx ); |
| 369 | } |
| 370 | else |
| 371 | { |
| 372 | raw[6] = (unsigned char) (r_idx >> 16); |
| 373 | raw[5] = (unsigned char) (r_idx>> 8); |
| 374 | raw[4] = (unsigned char) (r_idx ); |
| 375 | } |
| 376 | |
| 377 | if (r_extern) |
| 378 | raw[7] |= extern_mask; |
| 379 | } |
| 380 | |
| 381 | if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) |
| 382 | { |
| 383 | free (native); |
| 384 | return FALSE; |
| 385 | } |
| 386 | |
| 387 | free (native); |
| 388 | |
| 389 | return TRUE; |
| 390 | } |
| 391 | |
| 392 | static bfd_boolean |
| 393 | b_out_write_object_contents (bfd *abfd) |
| 394 | { |
| 395 | struct external_exec swapped_hdr; |
| 396 | bfd_size_type amt; |
| 397 | |
| 398 | if (! aout_32_make_sections (abfd)) |
| 399 | return FALSE; |
| 400 | |
| 401 | exec_hdr (abfd)->a_info = BMAGIC; |
| 402 | |
| 403 | exec_hdr (abfd)->a_text = obj_textsec (abfd)->size; |
| 404 | exec_hdr (abfd)->a_data = obj_datasec (abfd)->size; |
| 405 | exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->size; |
| 406 | exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * 12; |
| 407 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); |
| 408 | exec_hdr (abfd)->a_trsize = (obj_textsec (abfd)->reloc_count) * 8; |
| 409 | exec_hdr (abfd)->a_drsize = (obj_datasec (abfd)->reloc_count) * 8; |
| 410 | |
| 411 | exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; |
| 412 | exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; |
| 413 | exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; |
| 414 | |
| 415 | exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; |
| 416 | exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; |
| 417 | |
| 418 | bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); |
| 419 | |
| 420 | amt = EXEC_BYTES_SIZE; |
| 421 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
| 422 | || bfd_bwrite ((void *) &swapped_hdr, amt, abfd) != amt) |
| 423 | return FALSE; |
| 424 | |
| 425 | /* Now write out reloc info, followed by syms and strings */ |
| 426 | if (bfd_get_symcount (abfd) != 0) |
| 427 | { |
| 428 | /* Make sure {CALL,BAL}NAME symbols remain adjacent on output |
| 429 | by sorting. This is complicated by the fact that stabs are |
| 430 | also ordered. Solve this by shifting all stabs to the end |
| 431 | in order, then sorting the rest. */ |
| 432 | |
| 433 | asymbol **outsyms, **p, **q; |
| 434 | |
| 435 | outsyms = bfd_get_outsymbols (abfd); |
| 436 | p = outsyms + bfd_get_symcount (abfd); |
| 437 | |
| 438 | for (q = p--; p >= outsyms; p--) |
| 439 | { |
| 440 | if ((*p)->flags & BSF_DEBUGGING) |
| 441 | { |
| 442 | asymbol *t = *--q; |
| 443 | *q = *p; |
| 444 | *p = t; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | if (q > outsyms) |
| 449 | qsort (outsyms, (size_t) (q - outsyms), sizeof (asymbol*), |
| 450 | b_out_symbol_cmp); |
| 451 | |
| 452 | /* Back to your regularly scheduled program. */ |
| 453 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (exec_hdr (abfd))), SEEK_SET) |
| 454 | != 0) |
| 455 | return FALSE; |
| 456 | |
| 457 | if (! aout_32_write_syms (abfd)) |
| 458 | return FALSE; |
| 459 | |
| 460 | if (bfd_seek (abfd, (file_ptr) (N_TROFF (exec_hdr (abfd))), SEEK_SET) |
| 461 | != 0) |
| 462 | return FALSE; |
| 463 | |
| 464 | if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) |
| 465 | return FALSE; |
| 466 | if (bfd_seek (abfd, (file_ptr) (N_DROFF (exec_hdr (abfd))), SEEK_SET) |
| 467 | != 0) |
| 468 | return FALSE; |
| 469 | |
| 470 | if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) |
| 471 | return FALSE; |
| 472 | } |
| 473 | return TRUE; |
| 474 | } |
| 475 | \f |
| 476 | /* Some reloc hackery. */ |
| 477 | |
| 478 | #define CALLS 0x66003800 /* Template for 'calls' instruction */ |
| 479 | #define BAL 0x0b000000 /* Template for 'bal' instruction */ |
| 480 | #define BAL_MASK 0x00ffffff |
| 481 | #define BALX 0x85f00000 /* Template for 'balx' instruction */ |
| 482 | #define BALX_MASK 0x0007ffff |
| 483 | #define CALL 0x09000000 |
| 484 | #define PCREL13_MASK 0x1fff |
| 485 | |
| 486 | #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma) |
| 487 | |
| 488 | static bfd_vma |
| 489 | get_value (arelent *reloc, |
| 490 | struct bfd_link_info *link_info, |
| 491 | asection *input_section) |
| 492 | { |
| 493 | bfd_vma value; |
| 494 | asymbol *symbol = *(reloc->sym_ptr_ptr); |
| 495 | |
| 496 | /* A symbol holds a pointer to a section, and an offset from the |
| 497 | base of the section. To relocate, we find where the section will |
| 498 | live in the output and add that in. */ |
| 499 | if (bfd_is_und_section (symbol->section)) |
| 500 | { |
| 501 | struct bfd_link_hash_entry *h; |
| 502 | |
| 503 | /* The symbol is undefined in this BFD. Look it up in the |
| 504 | global linker hash table. FIXME: This should be changed when |
| 505 | we convert b.out to use a specific final_link function and |
| 506 | change the interface to bfd_relax_section to not require the |
| 507 | generic symbols. */ |
| 508 | h = bfd_wrapped_link_hash_lookup (input_section->owner, link_info, |
| 509 | bfd_asymbol_name (symbol), |
| 510 | FALSE, FALSE, TRUE); |
| 511 | if (h != (struct bfd_link_hash_entry *) NULL |
| 512 | && (h->type == bfd_link_hash_defined |
| 513 | || h->type == bfd_link_hash_defweak)) |
| 514 | value = h->u.def.value + output_addr (h->u.def.section); |
| 515 | else if (h != (struct bfd_link_hash_entry *) NULL |
| 516 | && h->type == bfd_link_hash_common) |
| 517 | value = h->u.c.size; |
| 518 | else |
| 519 | { |
| 520 | (*link_info->callbacks->undefined_symbol) |
| 521 | (link_info, bfd_asymbol_name (symbol), |
| 522 | input_section->owner, input_section, reloc->address, TRUE); |
| 523 | value = 0; |
| 524 | } |
| 525 | } |
| 526 | else |
| 527 | value = symbol->value + output_addr (symbol->section); |
| 528 | |
| 529 | /* Add the value contained in the relocation. */ |
| 530 | value += reloc->addend; |
| 531 | |
| 532 | return value; |
| 533 | } |
| 534 | |
| 535 | /* Magic to turn callx into calljx. */ |
| 536 | |
| 537 | static bfd_reloc_status_type |
| 538 | calljx_callback (bfd *abfd, |
| 539 | struct bfd_link_info *link_info, |
| 540 | arelent *reloc_entry, |
| 541 | void * src, |
| 542 | void * dst, |
| 543 | asection *input_section) |
| 544 | { |
| 545 | int word = bfd_get_32 (abfd, src); |
| 546 | asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); |
| 547 | aout_symbol_type *symbol = aout_symbol (symbol_in); |
| 548 | bfd_vma value; |
| 549 | |
| 550 | value = get_value (reloc_entry, link_info, input_section); |
| 551 | |
| 552 | if (IS_CALLNAME (symbol->other)) |
| 553 | { |
| 554 | aout_symbol_type *balsym = symbol+1; |
| 555 | int inst = bfd_get_32 (abfd, (bfd_byte *) src-4); |
| 556 | |
| 557 | /* The next symbol should be an N_BALNAME. */ |
| 558 | BFD_ASSERT (IS_BALNAME (balsym->other)); |
| 559 | inst &= BALX_MASK; |
| 560 | inst |= BALX; |
| 561 | bfd_put_32 (abfd, (bfd_vma) inst, (bfd_byte *) dst-4); |
| 562 | symbol = balsym; |
| 563 | value = (symbol->symbol.value |
| 564 | + output_addr (symbol->symbol.section)); |
| 565 | } |
| 566 | |
| 567 | word += value + reloc_entry->addend; |
| 568 | |
| 569 | bfd_put_32 (abfd, (bfd_vma) word, dst); |
| 570 | return bfd_reloc_ok; |
| 571 | } |
| 572 | |
| 573 | /* Magic to turn call into callj. */ |
| 574 | |
| 575 | static bfd_reloc_status_type |
| 576 | callj_callback (bfd *abfd, |
| 577 | struct bfd_link_info *link_info, |
| 578 | arelent *reloc_entry, |
| 579 | void * data, |
| 580 | unsigned int srcidx, |
| 581 | unsigned int dstidx, |
| 582 | asection *input_section, |
| 583 | bfd_boolean shrinking) |
| 584 | { |
| 585 | int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx); |
| 586 | asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); |
| 587 | aout_symbol_type *symbol = aout_symbol (symbol_in); |
| 588 | bfd_vma value; |
| 589 | |
| 590 | value = get_value (reloc_entry, link_info, input_section); |
| 591 | |
| 592 | if (IS_OTHER (symbol->other)) |
| 593 | /* Call to a system procedure - replace code with system |
| 594 | procedure number. */ |
| 595 | word = CALLS | (symbol->other - 1); |
| 596 | |
| 597 | else if (IS_CALLNAME (symbol->other)) |
| 598 | { |
| 599 | aout_symbol_type *balsym = symbol+1; |
| 600 | |
| 601 | /* The next symbol should be an N_BALNAME. */ |
| 602 | BFD_ASSERT (IS_BALNAME (balsym->other)); |
| 603 | |
| 604 | /* We are calling a leaf, so replace the call instruction with a |
| 605 | bal. */ |
| 606 | word = BAL | ((word |
| 607 | + output_addr (balsym->symbol.section) |
| 608 | + balsym->symbol.value + reloc_entry->addend |
| 609 | - dstidx |
| 610 | - output_addr (input_section)) |
| 611 | & BAL_MASK); |
| 612 | } |
| 613 | else if ((symbol->symbol.flags & BSF_SECTION_SYM) != 0) |
| 614 | { |
| 615 | /* A callj against a symbol in the same section is a fully |
| 616 | resolved relative call. We don't need to do anything here. |
| 617 | If the symbol is not in the same section, I'm not sure what |
| 618 | to do; fortunately, this case will probably never arise. */ |
| 619 | BFD_ASSERT (! shrinking); |
| 620 | BFD_ASSERT (symbol->symbol.section == input_section); |
| 621 | } |
| 622 | else |
| 623 | word = CALL | (((word & BAL_MASK) |
| 624 | + value |
| 625 | + reloc_entry->addend |
| 626 | - (shrinking ? dstidx : 0) |
| 627 | - output_addr (input_section)) |
| 628 | & BAL_MASK); |
| 629 | |
| 630 | bfd_put_32 (abfd, (bfd_vma) word, (bfd_byte *) data + dstidx); |
| 631 | return bfd_reloc_ok; |
| 632 | } |
| 633 | |
| 634 | static reloc_howto_type * |
| 635 | b_out_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 636 | bfd_reloc_code_real_type code) |
| 637 | { |
| 638 | switch (code) |
| 639 | { |
| 640 | default: |
| 641 | return 0; |
| 642 | case BFD_RELOC_I960_CALLJ: |
| 643 | return &howto_reloc_callj; |
| 644 | case BFD_RELOC_32: |
| 645 | case BFD_RELOC_CTOR: |
| 646 | return &howto_reloc_abs32; |
| 647 | case BFD_RELOC_24_PCREL: |
| 648 | return &howto_reloc_pcrel24; |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | static reloc_howto_type * |
| 653 | b_out_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 654 | const char *r_name) |
| 655 | { |
| 656 | if (strcasecmp (howto_reloc_callj.name, r_name) == 0) |
| 657 | return &howto_reloc_callj; |
| 658 | if (strcasecmp (howto_reloc_abs32.name, r_name) == 0) |
| 659 | return &howto_reloc_abs32; |
| 660 | if (strcasecmp (howto_reloc_pcrel24.name, r_name) == 0) |
| 661 | return &howto_reloc_pcrel24; |
| 662 | |
| 663 | return NULL; |
| 664 | } |
| 665 | |
| 666 | /* Allocate enough room for all the reloc entries, plus pointers to them all. */ |
| 667 | |
| 668 | static bfd_boolean |
| 669 | b_out_slurp_reloc_table (bfd *abfd, sec_ptr asect, asymbol **symbols) |
| 670 | { |
| 671 | struct relocation_info *rptr; |
| 672 | unsigned int counter; |
| 673 | arelent *cache_ptr; |
| 674 | int extern_mask, pcrel_mask, callj_mask, length_shift; |
| 675 | int incode_mask; |
| 676 | int size_mask; |
| 677 | bfd_vma prev_addr = 0; |
| 678 | unsigned int count; |
| 679 | bfd_size_type reloc_size, amt; |
| 680 | struct relocation_info *relocs; |
| 681 | arelent *reloc_cache; |
| 682 | |
| 683 | if (asect->relocation) |
| 684 | return TRUE; |
| 685 | |
| 686 | if (!aout_32_slurp_symbol_table (abfd)) |
| 687 | return FALSE; |
| 688 | |
| 689 | if (asect == obj_datasec (abfd)) |
| 690 | reloc_size = exec_hdr (abfd)->a_drsize; |
| 691 | else if (asect == obj_textsec (abfd)) |
| 692 | reloc_size = exec_hdr (abfd)->a_trsize; |
| 693 | else if (asect == obj_bsssec (abfd)) |
| 694 | reloc_size = 0; |
| 695 | else |
| 696 | { |
| 697 | bfd_set_error (bfd_error_invalid_operation); |
| 698 | return FALSE; |
| 699 | } |
| 700 | |
| 701 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
| 702 | return FALSE; |
| 703 | count = reloc_size / sizeof (struct relocation_info); |
| 704 | |
| 705 | relocs = bfd_malloc (reloc_size); |
| 706 | if (!relocs && reloc_size != 0) |
| 707 | return FALSE; |
| 708 | |
| 709 | amt = ((bfd_size_type) count + 1) * sizeof (arelent); |
| 710 | reloc_cache = bfd_malloc (amt); |
| 711 | if (!reloc_cache) |
| 712 | { |
| 713 | if (relocs != NULL) |
| 714 | free (relocs); |
| 715 | return FALSE; |
| 716 | } |
| 717 | |
| 718 | if (bfd_bread ((void *) relocs, reloc_size, abfd) != reloc_size) |
| 719 | { |
| 720 | free (reloc_cache); |
| 721 | if (relocs != NULL) |
| 722 | free (relocs); |
| 723 | return FALSE; |
| 724 | } |
| 725 | |
| 726 | if (bfd_header_big_endian (abfd)) |
| 727 | { |
| 728 | /* Big-endian bit field allocation order. */ |
| 729 | pcrel_mask = 0x80; |
| 730 | extern_mask = 0x10; |
| 731 | incode_mask = 0x08; |
| 732 | callj_mask = 0x02; |
| 733 | size_mask = 0x20; |
| 734 | length_shift = 5; |
| 735 | } |
| 736 | else |
| 737 | { |
| 738 | /* Little-endian bit field allocation order. */ |
| 739 | pcrel_mask = 0x01; |
| 740 | extern_mask = 0x08; |
| 741 | incode_mask = 0x10; |
| 742 | callj_mask = 0x40; |
| 743 | size_mask = 0x02; |
| 744 | length_shift = 1; |
| 745 | } |
| 746 | |
| 747 | for (rptr = relocs, cache_ptr = reloc_cache, counter = 0; |
| 748 | counter < count; |
| 749 | counter++, rptr++, cache_ptr++) |
| 750 | { |
| 751 | unsigned char *raw = (unsigned char *)rptr; |
| 752 | unsigned int symnum; |
| 753 | |
| 754 | cache_ptr->address = H_GET_32 (abfd, raw + 0); |
| 755 | cache_ptr->howto = 0; |
| 756 | |
| 757 | if (bfd_header_big_endian (abfd)) |
| 758 | symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6]; |
| 759 | else |
| 760 | symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4]; |
| 761 | |
| 762 | if (raw[7] & extern_mask) |
| 763 | { |
| 764 | /* If this is set then the r_index is an index into the symbol table; |
| 765 | if the bit is not set then r_index contains a section map. |
| 766 | We either fill in the sym entry with a pointer to the symbol, |
| 767 | or point to the correct section. */ |
| 768 | cache_ptr->sym_ptr_ptr = symbols + symnum; |
| 769 | cache_ptr->addend = 0; |
| 770 | } |
| 771 | else |
| 772 | { |
| 773 | /* In a.out symbols are relative to the beginning of the |
| 774 | file rather than sections ? |
| 775 | (look in translate_from_native_sym_flags) |
| 776 | The reloc entry addend has added to it the offset into the |
| 777 | file of the data, so subtract the base to make the reloc |
| 778 | section relative. */ |
| 779 | int s; |
| 780 | |
| 781 | /* Sign-extend symnum from 24 bits to whatever host uses. */ |
| 782 | s = symnum; |
| 783 | if (s & (1 << 23)) |
| 784 | s |= (~0U) << 24; |
| 785 | |
| 786 | cache_ptr->sym_ptr_ptr = (asymbol **)NULL; |
| 787 | switch (s) |
| 788 | { |
| 789 | case N_TEXT: |
| 790 | case N_TEXT | N_EXT: |
| 791 | cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; |
| 792 | cache_ptr->addend = - obj_textsec (abfd)->vma; |
| 793 | break; |
| 794 | case N_DATA: |
| 795 | case N_DATA | N_EXT: |
| 796 | cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; |
| 797 | cache_ptr->addend = - obj_datasec (abfd)->vma; |
| 798 | break; |
| 799 | case N_BSS: |
| 800 | case N_BSS | N_EXT: |
| 801 | cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; |
| 802 | cache_ptr->addend = - obj_bsssec (abfd)->vma; |
| 803 | break; |
| 804 | case N_ABS: |
| 805 | case N_ABS | N_EXT: |
| 806 | cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; |
| 807 | cache_ptr->addend = 0; |
| 808 | break; |
| 809 | case -2: /* .align */ |
| 810 | if (raw[7] & pcrel_mask) |
| 811 | { |
| 812 | cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3]; |
| 813 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 814 | } |
| 815 | else |
| 816 | { |
| 817 | /* .org? */ |
| 818 | abort (); |
| 819 | } |
| 820 | cache_ptr->addend = 0; |
| 821 | break; |
| 822 | default: |
| 823 | BFD_ASSERT (FALSE); |
| 824 | break; |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | /* The i960 only has a few relocation types: |
| 829 | abs 32-bit and pcrel 24bit. except for callj's! */ |
| 830 | if (cache_ptr->howto != 0) |
| 831 | ; |
| 832 | else if (raw[7] & callj_mask) |
| 833 | { |
| 834 | cache_ptr->howto = &howto_reloc_callj; |
| 835 | } |
| 836 | else if ( raw[7] & pcrel_mask) |
| 837 | { |
| 838 | if (raw[7] & size_mask) |
| 839 | cache_ptr->howto = &howto_reloc_pcrel13; |
| 840 | else |
| 841 | cache_ptr->howto = &howto_reloc_pcrel24; |
| 842 | } |
| 843 | else |
| 844 | { |
| 845 | if (raw[7] & incode_mask) |
| 846 | cache_ptr->howto = &howto_reloc_abs32code; |
| 847 | else |
| 848 | cache_ptr->howto = &howto_reloc_abs32; |
| 849 | } |
| 850 | |
| 851 | if (cache_ptr->address < prev_addr) |
| 852 | { |
| 853 | /* Ouch! this reloc is out of order, insert into the right place. */ |
| 854 | arelent tmp; |
| 855 | arelent *cursor = cache_ptr-1; |
| 856 | bfd_vma stop = cache_ptr->address; |
| 857 | |
| 858 | tmp = *cache_ptr; |
| 859 | while (cursor->address > stop && cursor >= reloc_cache) |
| 860 | { |
| 861 | cursor[1] = cursor[0]; |
| 862 | cursor--; |
| 863 | } |
| 864 | |
| 865 | cursor[1] = tmp; |
| 866 | } |
| 867 | else |
| 868 | prev_addr = cache_ptr->address; |
| 869 | } |
| 870 | |
| 871 | if (relocs != NULL) |
| 872 | free (relocs); |
| 873 | asect->relocation = reloc_cache; |
| 874 | asect->reloc_count = count; |
| 875 | |
| 876 | return TRUE; |
| 877 | } |
| 878 | |
| 879 | /* This is stupid. This function should be a boolean predicate. */ |
| 880 | |
| 881 | static long |
| 882 | b_out_canonicalize_reloc (bfd *abfd, |
| 883 | sec_ptr section, |
| 884 | arelent **relptr, |
| 885 | asymbol **symbols) |
| 886 | { |
| 887 | arelent *tblptr; |
| 888 | unsigned int count; |
| 889 | |
| 890 | if ((section->flags & SEC_CONSTRUCTOR) != 0) |
| 891 | { |
| 892 | arelent_chain *chain = section->constructor_chain; |
| 893 | |
| 894 | for (count = 0; count < section->reloc_count; count++) |
| 895 | { |
| 896 | *relptr++ = &chain->relent; |
| 897 | chain = chain->next; |
| 898 | } |
| 899 | } |
| 900 | else |
| 901 | { |
| 902 | if (section->relocation == NULL |
| 903 | && ! b_out_slurp_reloc_table (abfd, section, symbols)) |
| 904 | return -1; |
| 905 | |
| 906 | tblptr = section->relocation; |
| 907 | for (count = 0; count++ < section->reloc_count;) |
| 908 | *relptr++ = tblptr++; |
| 909 | } |
| 910 | |
| 911 | *relptr = NULL; |
| 912 | |
| 913 | return section->reloc_count; |
| 914 | } |
| 915 | |
| 916 | static long |
| 917 | b_out_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) |
| 918 | { |
| 919 | if (bfd_get_format (abfd) != bfd_object) |
| 920 | { |
| 921 | bfd_set_error (bfd_error_invalid_operation); |
| 922 | return -1; |
| 923 | } |
| 924 | |
| 925 | if (asect->flags & SEC_CONSTRUCTOR) |
| 926 | return sizeof (arelent *) * (asect->reloc_count + 1); |
| 927 | |
| 928 | if (asect == obj_datasec (abfd)) |
| 929 | return (sizeof (arelent *) * |
| 930 | ((exec_hdr (abfd)->a_drsize / sizeof (struct relocation_info)) |
| 931 | + 1)); |
| 932 | |
| 933 | if (asect == obj_textsec (abfd)) |
| 934 | return (sizeof (arelent *) * |
| 935 | ((exec_hdr (abfd)->a_trsize / sizeof (struct relocation_info)) |
| 936 | + 1)); |
| 937 | |
| 938 | if (asect == obj_bsssec (abfd)) |
| 939 | return 0; |
| 940 | |
| 941 | bfd_set_error (bfd_error_invalid_operation); |
| 942 | return -1; |
| 943 | } |
| 944 | |
| 945 | \f |
| 946 | static bfd_boolean |
| 947 | b_out_set_section_contents (bfd *abfd, |
| 948 | asection *section, |
| 949 | const void * location, |
| 950 | file_ptr offset, |
| 951 | bfd_size_type count) |
| 952 | { |
| 953 | if (! abfd->output_has_begun) |
| 954 | { |
| 955 | /* Set by bfd.c handler. */ |
| 956 | if (! aout_32_make_sections (abfd)) |
| 957 | return FALSE; |
| 958 | |
| 959 | obj_textsec (abfd)->filepos = sizeof (struct external_exec); |
| 960 | obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos |
| 961 | + obj_textsec (abfd)->size; |
| 962 | } |
| 963 | |
| 964 | /* Regardless, once we know what we're doing, we might as well get going. */ |
| 965 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) |
| 966 | return FALSE; |
| 967 | |
| 968 | if (count == 0) |
| 969 | return TRUE; |
| 970 | |
| 971 | return bfd_bwrite ((void *) location, count, abfd) == count; |
| 972 | } |
| 973 | |
| 974 | static bfd_boolean |
| 975 | b_out_set_arch_mach (bfd *abfd, |
| 976 | enum bfd_architecture arch, |
| 977 | unsigned long machine) |
| 978 | { |
| 979 | bfd_default_set_arch_mach (abfd, arch, machine); |
| 980 | |
| 981 | if (arch == bfd_arch_unknown) /* Unknown machine arch is OK. */ |
| 982 | return TRUE; |
| 983 | |
| 984 | if (arch == bfd_arch_i960) /* i960 default is OK. */ |
| 985 | switch (machine) |
| 986 | { |
| 987 | case bfd_mach_i960_core: |
| 988 | case bfd_mach_i960_kb_sb: |
| 989 | case bfd_mach_i960_mc: |
| 990 | case bfd_mach_i960_xa: |
| 991 | case bfd_mach_i960_ca: |
| 992 | case bfd_mach_i960_ka_sa: |
| 993 | case bfd_mach_i960_jx: |
| 994 | case bfd_mach_i960_hx: |
| 995 | case 0: |
| 996 | return TRUE; |
| 997 | default: |
| 998 | return FALSE; |
| 999 | } |
| 1000 | |
| 1001 | return FALSE; |
| 1002 | } |
| 1003 | |
| 1004 | static int |
| 1005 | b_out_sizeof_headers (bfd *ignore_abfd ATTRIBUTE_UNUSED, |
| 1006 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 1007 | { |
| 1008 | return sizeof (struct external_exec); |
| 1009 | } |
| 1010 | \f |
| 1011 | static void |
| 1012 | perform_slip (bfd *abfd, |
| 1013 | unsigned int slip, |
| 1014 | asection *input_section, |
| 1015 | bfd_vma value) |
| 1016 | { |
| 1017 | asymbol **s; |
| 1018 | |
| 1019 | s = _bfd_generic_link_get_symbols (abfd); |
| 1020 | BFD_ASSERT (s != (asymbol **) NULL); |
| 1021 | |
| 1022 | /* Find all symbols past this point, and make them know |
| 1023 | what's happened. */ |
| 1024 | while (*s) |
| 1025 | { |
| 1026 | asymbol *p = *s; |
| 1027 | |
| 1028 | if (p->section == input_section) |
| 1029 | { |
| 1030 | /* This was pointing into this section, so mangle it. */ |
| 1031 | if (p->value > value) |
| 1032 | { |
| 1033 | p->value -=slip; |
| 1034 | |
| 1035 | if (p->udata.p != NULL) |
| 1036 | { |
| 1037 | struct generic_link_hash_entry *h; |
| 1038 | |
| 1039 | h = (struct generic_link_hash_entry *) p->udata.p; |
| 1040 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| 1041 | h->root.u.def.value -= slip; |
| 1042 | BFD_ASSERT (h->root.u.def.value == p->value); |
| 1043 | } |
| 1044 | } |
| 1045 | } |
| 1046 | s++; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | /* This routine works out if the thing we want to get to can be |
| 1051 | reached with a 24bit offset instead of a 32 bit one. |
| 1052 | If it can, then it changes the amode. */ |
| 1053 | |
| 1054 | static int |
| 1055 | abs32code (bfd *abfd, |
| 1056 | asection *input_section, |
| 1057 | arelent *r, |
| 1058 | unsigned int shrink, |
| 1059 | struct bfd_link_info *link_info) |
| 1060 | { |
| 1061 | bfd_vma value = get_value (r, link_info, input_section); |
| 1062 | bfd_vma dot = output_addr (input_section) + r->address; |
| 1063 | bfd_vma gap; |
| 1064 | |
| 1065 | /* See if the address we're looking at within 2^23 bytes of where |
| 1066 | we are, if so then we can use a small branch rather than the |
| 1067 | jump we were going to. */ |
| 1068 | gap = value - (dot - shrink); |
| 1069 | |
| 1070 | if ((long)(-1UL << 23) < (long)gap && (long)gap < 1L << 23) |
| 1071 | { |
| 1072 | /* Change the reloc type from 32bitcode possible 24, to 24bit |
| 1073 | possible 32. */ |
| 1074 | r->howto = &howto_reloc_abs32codeshrunk; |
| 1075 | /* The place to relc moves back by four bytes. */ |
| 1076 | r->address -=4; |
| 1077 | |
| 1078 | /* This will be four bytes smaller in the long run. */ |
| 1079 | shrink += 4 ; |
| 1080 | perform_slip (abfd, 4, input_section, r->address-shrink + 4); |
| 1081 | } |
| 1082 | |
| 1083 | return shrink; |
| 1084 | } |
| 1085 | |
| 1086 | static int |
| 1087 | aligncode (bfd *abfd, |
| 1088 | asection *input_section, |
| 1089 | arelent *r, |
| 1090 | unsigned int shrink) |
| 1091 | { |
| 1092 | bfd_vma dot = output_addr (input_section) + r->address; |
| 1093 | bfd_vma old_end; |
| 1094 | bfd_vma new_end; |
| 1095 | unsigned int shrink_delta; |
| 1096 | int size = r->howto->size; |
| 1097 | |
| 1098 | /* Reduce the size of the alignment so that it's still aligned but |
| 1099 | smaller - the current size is already the same size as or bigger |
| 1100 | than the alignment required. */ |
| 1101 | |
| 1102 | /* Calculate the first byte following the padding before we optimize. */ |
| 1103 | old_end = ((dot + size ) & ~size) + size+1; |
| 1104 | /* Work out where the new end will be - remember that we're smaller |
| 1105 | than we used to be. */ |
| 1106 | new_end = ((dot - shrink + size) & ~size); |
| 1107 | |
| 1108 | shrink_delta = (old_end - new_end) - shrink; |
| 1109 | |
| 1110 | if (shrink_delta) |
| 1111 | { |
| 1112 | /* Change the reloc so that it knows how far to align to. */ |
| 1113 | r->howto = howto_done_align_table + (r->howto - howto_align_table); |
| 1114 | |
| 1115 | /* Encode the stuff into the addend - for future use we need to |
| 1116 | know how big the reloc used to be. */ |
| 1117 | r->addend = old_end - dot + r->address; |
| 1118 | |
| 1119 | /* This will be N bytes smaller in the long run, adjust all the symbols. */ |
| 1120 | perform_slip (abfd, shrink_delta, input_section, r->address - shrink); |
| 1121 | shrink += shrink_delta; |
| 1122 | } |
| 1123 | |
| 1124 | return shrink; |
| 1125 | } |
| 1126 | |
| 1127 | static bfd_boolean |
| 1128 | b_out_bfd_relax_section (bfd *abfd, |
| 1129 | asection *i, |
| 1130 | struct bfd_link_info *link_info, |
| 1131 | bfd_boolean *again) |
| 1132 | { |
| 1133 | /* Get enough memory to hold the stuff. */ |
| 1134 | bfd *input_bfd = i->owner; |
| 1135 | asection *input_section = i; |
| 1136 | unsigned int shrink = 0 ; |
| 1137 | arelent **reloc_vector = NULL; |
| 1138 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 1139 | |
| 1140 | if (bfd_link_relocatable (link_info)) |
| 1141 | (*link_info->callbacks->einfo) |
| 1142 | (_("%P%F: --relax and -r may not be used together\n")); |
| 1143 | |
| 1144 | if (reloc_size < 0) |
| 1145 | return FALSE; |
| 1146 | |
| 1147 | /* We only run this relaxation once. It might work to run it |
| 1148 | multiple times, but it hasn't been tested. */ |
| 1149 | *again = FALSE; |
| 1150 | |
| 1151 | if (reloc_size) |
| 1152 | { |
| 1153 | long reloc_count; |
| 1154 | |
| 1155 | reloc_vector = bfd_malloc ((bfd_size_type) reloc_size); |
| 1156 | if (reloc_vector == NULL && reloc_size != 0) |
| 1157 | goto error_return; |
| 1158 | |
| 1159 | /* Get the relocs and think about them. */ |
| 1160 | reloc_count = |
| 1161 | bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector, |
| 1162 | _bfd_generic_link_get_symbols (input_bfd)); |
| 1163 | if (reloc_count < 0) |
| 1164 | goto error_return; |
| 1165 | if (reloc_count > 0) |
| 1166 | { |
| 1167 | arelent **parent; |
| 1168 | |
| 1169 | for (parent = reloc_vector; *parent; parent++) |
| 1170 | { |
| 1171 | arelent *r = *parent; |
| 1172 | |
| 1173 | switch (r->howto->type) |
| 1174 | { |
| 1175 | case ALIGNER: |
| 1176 | /* An alignment reloc. */ |
| 1177 | shrink = aligncode (abfd, input_section, r, shrink); |
| 1178 | break; |
| 1179 | case ABS32CODE: |
| 1180 | /* A 32bit reloc in an addressing mode. */ |
| 1181 | shrink = abs32code (input_bfd, input_section, r, shrink, |
| 1182 | link_info); |
| 1183 | break; |
| 1184 | case ABS32CODE_SHRUNK: |
| 1185 | shrink += 4; |
| 1186 | break; |
| 1187 | } |
| 1188 | } |
| 1189 | } |
| 1190 | } |
| 1191 | input_section->size -= shrink; |
| 1192 | |
| 1193 | if (reloc_vector != NULL) |
| 1194 | free (reloc_vector); |
| 1195 | return TRUE; |
| 1196 | error_return: |
| 1197 | if (reloc_vector != NULL) |
| 1198 | free (reloc_vector); |
| 1199 | return FALSE; |
| 1200 | } |
| 1201 | |
| 1202 | static bfd_byte * |
| 1203 | b_out_bfd_get_relocated_section_contents (bfd *output_bfd, |
| 1204 | struct bfd_link_info *link_info, |
| 1205 | struct bfd_link_order *link_order, |
| 1206 | bfd_byte *data, |
| 1207 | bfd_boolean relocatable, |
| 1208 | asymbol **symbols) |
| 1209 | { |
| 1210 | /* Get enough memory to hold the stuff. */ |
| 1211 | bfd *input_bfd = link_order->u.indirect.section->owner; |
| 1212 | asection *input_section = link_order->u.indirect.section; |
| 1213 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 1214 | arelent **reloc_vector = NULL; |
| 1215 | long reloc_count; |
| 1216 | |
| 1217 | if (reloc_size < 0) |
| 1218 | goto error_return; |
| 1219 | |
| 1220 | /* If producing relocatable output, don't bother to relax. */ |
| 1221 | if (relocatable) |
| 1222 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| 1223 | link_order, |
| 1224 | data, relocatable, |
| 1225 | symbols); |
| 1226 | |
| 1227 | reloc_vector = bfd_malloc ((bfd_size_type) reloc_size); |
| 1228 | if (reloc_vector == NULL && reloc_size != 0) |
| 1229 | goto error_return; |
| 1230 | |
| 1231 | /* Read in the section. */ |
| 1232 | BFD_ASSERT (bfd_get_section_contents (input_bfd, |
| 1233 | input_section, |
| 1234 | data, |
| 1235 | (bfd_vma) 0, |
| 1236 | input_section->size)); |
| 1237 | |
| 1238 | reloc_count = bfd_canonicalize_reloc (input_bfd, |
| 1239 | input_section, |
| 1240 | reloc_vector, |
| 1241 | symbols); |
| 1242 | if (reloc_count < 0) |
| 1243 | goto error_return; |
| 1244 | if (reloc_count > 0) |
| 1245 | { |
| 1246 | arelent **parent = reloc_vector; |
| 1247 | arelent *reloc ; |
| 1248 | unsigned int dst_address = 0; |
| 1249 | unsigned int src_address = 0; |
| 1250 | unsigned int run; |
| 1251 | unsigned int idx; |
| 1252 | |
| 1253 | /* Find how long a run we can do. */ |
| 1254 | while (dst_address < link_order->size) |
| 1255 | { |
| 1256 | reloc = *parent; |
| 1257 | if (reloc) |
| 1258 | { |
| 1259 | /* Note that the relaxing didn't tie up the addresses in the |
| 1260 | relocation, so we use the original address to work out the |
| 1261 | run of non-relocated data. */ |
| 1262 | BFD_ASSERT (reloc->address >= src_address); |
| 1263 | run = reloc->address - src_address; |
| 1264 | parent++; |
| 1265 | } |
| 1266 | else |
| 1267 | run = link_order->size - dst_address; |
| 1268 | |
| 1269 | /* Copy the bytes. */ |
| 1270 | for (idx = 0; idx < run; idx++) |
| 1271 | data[dst_address++] = data[src_address++]; |
| 1272 | |
| 1273 | /* Now do the relocation. */ |
| 1274 | if (reloc) |
| 1275 | { |
| 1276 | switch (reloc->howto->type) |
| 1277 | { |
| 1278 | case ABS32CODE: |
| 1279 | calljx_callback (input_bfd, link_info, reloc, |
| 1280 | src_address + data, dst_address + data, |
| 1281 | input_section); |
| 1282 | src_address += 4; |
| 1283 | dst_address += 4; |
| 1284 | break; |
| 1285 | case ABS32: |
| 1286 | bfd_put_32 (input_bfd, |
| 1287 | (bfd_get_32 (input_bfd, data + src_address) |
| 1288 | + get_value (reloc, link_info, input_section)), |
| 1289 | data + dst_address); |
| 1290 | src_address += 4; |
| 1291 | dst_address += 4; |
| 1292 | break; |
| 1293 | case CALLJ: |
| 1294 | callj_callback (input_bfd, link_info, reloc, data, |
| 1295 | src_address, dst_address, input_section, |
| 1296 | FALSE); |
| 1297 | src_address += 4; |
| 1298 | dst_address += 4; |
| 1299 | break; |
| 1300 | case ALIGNDONE: |
| 1301 | BFD_ASSERT (reloc->addend >= src_address); |
| 1302 | BFD_ASSERT ((bfd_vma) reloc->addend |
| 1303 | <= input_section->size); |
| 1304 | src_address = reloc->addend; |
| 1305 | dst_address = ((dst_address + reloc->howto->size) |
| 1306 | & ~reloc->howto->size); |
| 1307 | break; |
| 1308 | case ABS32CODE_SHRUNK: |
| 1309 | /* This used to be a callx, but we've found out that a |
| 1310 | callj will reach, so do the right thing. */ |
| 1311 | callj_callback (input_bfd, link_info, reloc, data, |
| 1312 | src_address + 4, dst_address, input_section, |
| 1313 | TRUE); |
| 1314 | dst_address += 4; |
| 1315 | src_address += 8; |
| 1316 | break; |
| 1317 | case PCREL24: |
| 1318 | { |
| 1319 | long int word = bfd_get_32 (input_bfd, |
| 1320 | data + src_address); |
| 1321 | bfd_vma value; |
| 1322 | |
| 1323 | value = get_value (reloc, link_info, input_section); |
| 1324 | word = ((word & ~BAL_MASK) |
| 1325 | | (((word & BAL_MASK) |
| 1326 | + value |
| 1327 | - output_addr (input_section) |
| 1328 | + reloc->addend) |
| 1329 | & BAL_MASK)); |
| 1330 | |
| 1331 | bfd_put_32 (input_bfd, (bfd_vma) word, data + dst_address); |
| 1332 | dst_address += 4; |
| 1333 | src_address += 4; |
| 1334 | |
| 1335 | } |
| 1336 | break; |
| 1337 | case PCREL13: |
| 1338 | { |
| 1339 | long int word = bfd_get_32 (input_bfd, |
| 1340 | data + src_address); |
| 1341 | bfd_vma value; |
| 1342 | |
| 1343 | value = get_value (reloc, link_info, input_section); |
| 1344 | word = ((word & ~PCREL13_MASK) |
| 1345 | | (((word & PCREL13_MASK) |
| 1346 | + value |
| 1347 | + reloc->addend |
| 1348 | - output_addr (input_section)) |
| 1349 | & PCREL13_MASK)); |
| 1350 | |
| 1351 | bfd_put_32 (input_bfd, (bfd_vma) word, data + dst_address); |
| 1352 | dst_address += 4; |
| 1353 | src_address += 4; |
| 1354 | } |
| 1355 | break; |
| 1356 | |
| 1357 | default: |
| 1358 | abort (); |
| 1359 | } |
| 1360 | } |
| 1361 | } |
| 1362 | } |
| 1363 | if (reloc_vector != NULL) |
| 1364 | free (reloc_vector); |
| 1365 | return data; |
| 1366 | error_return: |
| 1367 | if (reloc_vector != NULL) |
| 1368 | free (reloc_vector); |
| 1369 | return NULL; |
| 1370 | } |
| 1371 | \f |
| 1372 | |
| 1373 | /* Build the transfer vectors for Big and Little-Endian B.OUT files. */ |
| 1374 | |
| 1375 | #define aout_32_find_line _bfd_nosymbols_find_line |
| 1376 | #define aout_32_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string |
| 1377 | #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
| 1378 | #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info |
| 1379 | #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
| 1380 | #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols |
| 1381 | #define b_out_bfd_link_just_syms _bfd_generic_link_just_syms |
| 1382 | #define b_out_bfd_copy_link_hash_symbol_type \ |
| 1383 | _bfd_generic_copy_link_hash_symbol_type |
| 1384 | #define b_out_bfd_final_link _bfd_generic_final_link |
| 1385 | #define b_out_bfd_link_split_section _bfd_generic_link_split_section |
| 1386 | #define b_out_bfd_gc_sections bfd_generic_gc_sections |
| 1387 | #define b_out_bfd_lookup_section_flags bfd_generic_lookup_section_flags |
| 1388 | #define b_out_bfd_merge_sections bfd_generic_merge_sections |
| 1389 | #define b_out_bfd_is_group_section bfd_generic_is_group_section |
| 1390 | #define b_out_bfd_discard_group bfd_generic_discard_group |
| 1391 | #define b_out_section_already_linked _bfd_generic_section_already_linked |
| 1392 | #define b_out_bfd_define_common_symbol bfd_generic_define_common_symbol |
| 1393 | #define aout_32_get_section_contents_in_window _bfd_generic_get_section_contents_in_window |
| 1394 | #define b_out_bfd_link_check_relocs _bfd_generic_link_check_relocs |
| 1395 | |
| 1396 | extern const bfd_target bout_le_vec; |
| 1397 | |
| 1398 | const bfd_target bout_be_vec = |
| 1399 | { |
| 1400 | "b.out.big", /* Name. */ |
| 1401 | bfd_target_aout_flavour, |
| 1402 | BFD_ENDIAN_LITTLE, /* Data byte order. */ |
| 1403 | BFD_ENDIAN_BIG, /* Header byte order. */ |
| 1404 | (HAS_RELOC | EXEC_P | /* Object flags. */ |
| 1405 | HAS_LINENO | HAS_DEBUG | |
| 1406 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), |
| 1407 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 1408 | '_', /* Symbol leading char. */ |
| 1409 | ' ', /* AR_pad_char. */ |
| 1410 | 16, /* AR_max_namelen. */ |
| 1411 | 0, /* match priority. */ |
| 1412 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 1413 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 1414 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ |
| 1415 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 1416 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 1417 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Headers. */ |
| 1418 | {_bfd_dummy_target, b_out_object_p, /* bfd_check_format. */ |
| 1419 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 1420 | {bfd_false, b_out_mkobject, /* bfd_set_format. */ |
| 1421 | _bfd_generic_mkarchive, bfd_false}, |
| 1422 | {bfd_false, b_out_write_object_contents, /* bfd_write_contents. */ |
| 1423 | _bfd_write_archive_contents, bfd_false}, |
| 1424 | |
| 1425 | BFD_JUMP_TABLE_GENERIC (aout_32), |
| 1426 | BFD_JUMP_TABLE_COPY (_bfd_generic), |
| 1427 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 1428 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), |
| 1429 | BFD_JUMP_TABLE_SYMBOLS (aout_32), |
| 1430 | BFD_JUMP_TABLE_RELOCS (b_out), |
| 1431 | BFD_JUMP_TABLE_WRITE (b_out), |
| 1432 | BFD_JUMP_TABLE_LINK (b_out), |
| 1433 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 1434 | |
| 1435 | & bout_le_vec, |
| 1436 | |
| 1437 | NULL |
| 1438 | }; |
| 1439 | |
| 1440 | const bfd_target bout_le_vec = |
| 1441 | { |
| 1442 | "b.out.little", /* Name. */ |
| 1443 | bfd_target_aout_flavour, |
| 1444 | BFD_ENDIAN_LITTLE, /* Data byte order. */ |
| 1445 | BFD_ENDIAN_LITTLE, /* Header byte order. */ |
| 1446 | (HAS_RELOC | EXEC_P | /* Object flags. */ |
| 1447 | HAS_LINENO | HAS_DEBUG | |
| 1448 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), |
| 1449 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), |
| 1450 | '_', /* Symbol leading char. */ |
| 1451 | ' ', /* AR_pad_char. */ |
| 1452 | 16, /* AR_max_namelen. */ |
| 1453 | 0, /* match priority. */ |
| 1454 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 1455 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 1456 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ |
| 1457 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 1458 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 1459 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */ |
| 1460 | |
| 1461 | {_bfd_dummy_target, b_out_object_p, /* bfd_check_format. */ |
| 1462 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 1463 | {bfd_false, b_out_mkobject, /* bfd_set_format. */ |
| 1464 | _bfd_generic_mkarchive, bfd_false}, |
| 1465 | {bfd_false, b_out_write_object_contents, /* bfd_write_contents. */ |
| 1466 | _bfd_write_archive_contents, bfd_false}, |
| 1467 | |
| 1468 | BFD_JUMP_TABLE_GENERIC (aout_32), |
| 1469 | BFD_JUMP_TABLE_COPY (_bfd_generic), |
| 1470 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 1471 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), |
| 1472 | BFD_JUMP_TABLE_SYMBOLS (aout_32), |
| 1473 | BFD_JUMP_TABLE_RELOCS (b_out), |
| 1474 | BFD_JUMP_TABLE_WRITE (b_out), |
| 1475 | BFD_JUMP_TABLE_LINK (b_out), |
| 1476 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 1477 | |
| 1478 | & bout_be_vec, |
| 1479 | |
| 1480 | NULL |
| 1481 | }; |