| 1 | /* write.c - emit .o file |
| 2 | Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS 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 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS 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 GAS; see the file COPYING. If not, write to the Free |
| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. */ |
| 21 | |
| 22 | /* This thing should be set up to do byteordering correctly. But... */ |
| 23 | |
| 24 | #include "as.h" |
| 25 | #include "subsegs.h" |
| 26 | #include "obstack.h" |
| 27 | #include "output-file.h" |
| 28 | |
| 29 | /* This looks like a good idea. Let's try turning it on always, for now. */ |
| 30 | #undef BFD_FAST_SECTION_FILL |
| 31 | #define BFD_FAST_SECTION_FILL |
| 32 | |
| 33 | /* The NOP_OPCODE is for the alignment fill value. Fill it with a nop |
| 34 | instruction so that the disassembler does not choke on it. */ |
| 35 | #ifndef NOP_OPCODE |
| 36 | #define NOP_OPCODE 0x00 |
| 37 | #endif |
| 38 | |
| 39 | #ifndef TC_ADJUST_RELOC_COUNT |
| 40 | #define TC_ADJUST_RELOC_COUNT(FIXP,COUNT) |
| 41 | #endif |
| 42 | |
| 43 | #ifndef TC_FORCE_RELOCATION |
| 44 | #define TC_FORCE_RELOCATION(FIXP) 0 |
| 45 | #endif |
| 46 | |
| 47 | #ifndef TC_FORCE_RELOCATION_SECTION |
| 48 | #define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP) |
| 49 | #endif |
| 50 | |
| 51 | #ifndef TC_LINKRELAX_FIXUP |
| 52 | #define TC_LINKRELAX_FIXUP(SEG) 1 |
| 53 | #endif |
| 54 | |
| 55 | #ifndef TC_FIX_ADJUSTABLE |
| 56 | #define TC_FIX_ADJUSTABLE(fix) 1 |
| 57 | #endif |
| 58 | |
| 59 | #ifndef MD_PCREL_FROM_SECTION |
| 60 | #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP) |
| 61 | #endif |
| 62 | |
| 63 | #ifndef WORKING_DOT_WORD |
| 64 | extern CONST int md_short_jump_size; |
| 65 | extern CONST int md_long_jump_size; |
| 66 | #endif |
| 67 | |
| 68 | int symbol_table_frozen; |
| 69 | void print_fixup PARAMS ((fixS *)); |
| 70 | |
| 71 | #ifdef BFD_ASSEMBLER |
| 72 | static void renumber_sections PARAMS ((bfd *, asection *, PTR)); |
| 73 | |
| 74 | /* We generally attach relocs to frag chains. However, after we have |
| 75 | chained these all together into a segment, any relocs we add after |
| 76 | that must be attached to a segment. This will include relocs added |
| 77 | in md_estimate_size_for_relax, for example. */ |
| 78 | static int frags_chained = 0; |
| 79 | #endif |
| 80 | |
| 81 | #ifndef BFD_ASSEMBLER |
| 82 | |
| 83 | #ifndef MANY_SEGMENTS |
| 84 | struct frag *text_frag_root; |
| 85 | struct frag *data_frag_root; |
| 86 | struct frag *bss_frag_root; |
| 87 | |
| 88 | struct frag *text_last_frag; /* Last frag in segment. */ |
| 89 | struct frag *data_last_frag; /* Last frag in segment. */ |
| 90 | static struct frag *bss_last_frag; /* Last frag in segment. */ |
| 91 | #endif |
| 92 | |
| 93 | #ifndef BFD |
| 94 | static object_headers headers; |
| 95 | #endif |
| 96 | |
| 97 | long string_byte_count; |
| 98 | char *next_object_file_charP; /* Tracks object file bytes. */ |
| 99 | |
| 100 | #ifndef OBJ_VMS |
| 101 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; |
| 102 | #endif |
| 103 | |
| 104 | #endif /* BFD_ASSEMBLER */ |
| 105 | |
| 106 | static int n_fixups; |
| 107 | |
| 108 | #ifdef BFD_ASSEMBLER |
| 109 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
| 110 | symbolS *add, symbolS *sub, |
| 111 | offsetT offset, int pcrel, |
| 112 | bfd_reloc_code_real_type r_type)); |
| 113 | #else |
| 114 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
| 115 | symbolS *add, symbolS *sub, |
| 116 | offsetT offset, int pcrel, |
| 117 | int r_type)); |
| 118 | #endif |
| 119 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) |
| 120 | static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); |
| 121 | #endif |
| 122 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); |
| 123 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) |
| 124 | static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *)); |
| 125 | #endif |
| 126 | #ifdef BFD_ASSEMBLER |
| 127 | static void chain_frchains_together PARAMS ((bfd *, segT, PTR)); |
| 128 | static void cvt_frag_to_fill PARAMS ((segT, fragS *)); |
| 129 | static void relax_and_size_seg PARAMS ((bfd *, asection *, PTR)); |
| 130 | static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR)); |
| 131 | static void write_relocs PARAMS ((bfd *, asection *, PTR)); |
| 132 | static void write_contents PARAMS ((bfd *, asection *, PTR)); |
| 133 | static void set_symtab PARAMS ((void)); |
| 134 | #endif |
| 135 | #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT)) |
| 136 | static void merge_data_into_text PARAMS ((void)); |
| 137 | #endif |
| 138 | #if ! defined (BFD_ASSEMBLER) && ! defined (BFD) |
| 139 | static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *)); |
| 140 | static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **)); |
| 141 | static void relax_and_size_all_segments PARAMS ((void)); |
| 142 | #endif |
| 143 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
| 144 | static void set_segment_vma PARAMS ((bfd *, asection *, PTR)); |
| 145 | #endif |
| 146 | |
| 147 | /* Create a fixS in obstack 'notes'. */ |
| 148 | |
| 149 | static fixS * |
| 150 | fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, |
| 151 | r_type) |
| 152 | fragS *frag; /* Which frag? */ |
| 153 | int where; /* Where in that frag? */ |
| 154 | int size; /* 1, 2, or 4 usually. */ |
| 155 | symbolS *add_symbol; /* X_add_symbol. */ |
| 156 | symbolS *sub_symbol; /* X_op_symbol. */ |
| 157 | offsetT offset; /* X_add_number. */ |
| 158 | int pcrel; /* TRUE if PC-relative relocation. */ |
| 159 | #ifdef BFD_ASSEMBLER |
| 160 | bfd_reloc_code_real_type r_type; /* Relocation type. */ |
| 161 | #else |
| 162 | int r_type; /* Relocation type. */ |
| 163 | #endif |
| 164 | { |
| 165 | fixS *fixP; |
| 166 | |
| 167 | n_fixups++; |
| 168 | |
| 169 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); |
| 170 | |
| 171 | fixP->fx_frag = frag; |
| 172 | fixP->fx_where = where; |
| 173 | fixP->fx_size = size; |
| 174 | /* We've made fx_size a narrow field; check that it's wide enough. */ |
| 175 | if (fixP->fx_size != size) |
| 176 | { |
| 177 | as_bad (_("field fx_size too small to hold %d"), size); |
| 178 | abort (); |
| 179 | } |
| 180 | fixP->fx_addsy = add_symbol; |
| 181 | fixP->fx_subsy = sub_symbol; |
| 182 | fixP->fx_offset = offset; |
| 183 | fixP->fx_pcrel = pcrel; |
| 184 | fixP->fx_plt = 0; |
| 185 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) |
| 186 | fixP->fx_r_type = r_type; |
| 187 | #endif |
| 188 | fixP->fx_im_disp = 0; |
| 189 | fixP->fx_pcrel_adjust = 0; |
| 190 | fixP->fx_bit_fixP = 0; |
| 191 | fixP->fx_addnumber = 0; |
| 192 | fixP->fx_tcbit = 0; |
| 193 | fixP->fx_done = 0; |
| 194 | fixP->fx_no_overflow = 0; |
| 195 | fixP->fx_signed = 0; |
| 196 | |
| 197 | #ifdef USING_CGEN |
| 198 | fixP->fx_cgen.insn = NULL; |
| 199 | fixP->fx_cgen.opinfo = 0; |
| 200 | #endif |
| 201 | |
| 202 | #ifdef TC_FIX_TYPE |
| 203 | TC_INIT_FIX_DATA (fixP); |
| 204 | #endif |
| 205 | |
| 206 | as_where (&fixP->fx_file, &fixP->fx_line); |
| 207 | |
| 208 | /* Usually, we want relocs sorted numerically, but while |
| 209 | comparing to older versions of gas that have relocs |
| 210 | reverse sorted, it is convenient to have this compile |
| 211 | time option. xoxorich. */ |
| 212 | { |
| 213 | |
| 214 | #ifdef BFD_ASSEMBLER |
| 215 | fixS **seg_fix_rootP = (frags_chained |
| 216 | ? &seg_info (now_seg)->fix_root |
| 217 | : &frchain_now->fix_root); |
| 218 | fixS **seg_fix_tailP = (frags_chained |
| 219 | ? &seg_info (now_seg)->fix_tail |
| 220 | : &frchain_now->fix_tail); |
| 221 | #endif |
| 222 | |
| 223 | #ifdef REVERSE_SORT_RELOCS |
| 224 | |
| 225 | fixP->fx_next = *seg_fix_rootP; |
| 226 | *seg_fix_rootP = fixP; |
| 227 | |
| 228 | #else /* REVERSE_SORT_RELOCS */ |
| 229 | |
| 230 | fixP->fx_next = NULL; |
| 231 | |
| 232 | if (*seg_fix_tailP) |
| 233 | (*seg_fix_tailP)->fx_next = fixP; |
| 234 | else |
| 235 | *seg_fix_rootP = fixP; |
| 236 | *seg_fix_tailP = fixP; |
| 237 | |
| 238 | #endif /* REVERSE_SORT_RELOCS */ |
| 239 | } |
| 240 | |
| 241 | return fixP; |
| 242 | } |
| 243 | |
| 244 | /* Create a fixup relative to a symbol (plus a constant). */ |
| 245 | |
| 246 | fixS * |
| 247 | fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) |
| 248 | fragS *frag; /* Which frag? */ |
| 249 | int where; /* Where in that frag? */ |
| 250 | int size; /* 1, 2, or 4 usually. */ |
| 251 | symbolS *add_symbol; /* X_add_symbol. */ |
| 252 | offsetT offset; /* X_add_number. */ |
| 253 | int pcrel; /* TRUE if PC-relative relocation. */ |
| 254 | #ifdef BFD_ASSEMBLER |
| 255 | bfd_reloc_code_real_type r_type; /* Relocation type. */ |
| 256 | #else |
| 257 | int r_type; /* Relocation type. */ |
| 258 | #endif |
| 259 | { |
| 260 | return fix_new_internal (frag, where, size, add_symbol, |
| 261 | (symbolS *) NULL, offset, pcrel, r_type); |
| 262 | } |
| 263 | |
| 264 | /* Create a fixup for an expression. Currently we only support fixups |
| 265 | for difference expressions. That is itself more than most object |
| 266 | file formats support anyhow. */ |
| 267 | |
| 268 | fixS * |
| 269 | fix_new_exp (frag, where, size, exp, pcrel, r_type) |
| 270 | fragS *frag; /* Which frag? */ |
| 271 | int where; /* Where in that frag? */ |
| 272 | int size; /* 1, 2, or 4 usually. */ |
| 273 | expressionS *exp; /* Expression. */ |
| 274 | int pcrel; /* TRUE if PC-relative relocation. */ |
| 275 | #ifdef BFD_ASSEMBLER |
| 276 | bfd_reloc_code_real_type r_type; /* Relocation type. */ |
| 277 | #else |
| 278 | int r_type; /* Relocation type. */ |
| 279 | #endif |
| 280 | { |
| 281 | symbolS *add = NULL; |
| 282 | symbolS *sub = NULL; |
| 283 | offsetT off = 0; |
| 284 | |
| 285 | switch (exp->X_op) |
| 286 | { |
| 287 | case O_absent: |
| 288 | break; |
| 289 | |
| 290 | case O_add: |
| 291 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if |
| 292 | the difference expression cannot immediately be reduced. */ |
| 293 | { |
| 294 | symbolS *stmp = make_expr_symbol (exp); |
| 295 | |
| 296 | exp->X_op = O_symbol; |
| 297 | exp->X_op_symbol = 0; |
| 298 | exp->X_add_symbol = stmp; |
| 299 | exp->X_add_number = 0; |
| 300 | |
| 301 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
| 302 | } |
| 303 | |
| 304 | case O_symbol_rva: |
| 305 | add = exp->X_add_symbol; |
| 306 | off = exp->X_add_number; |
| 307 | |
| 308 | #if defined(BFD_ASSEMBLER) |
| 309 | r_type = BFD_RELOC_RVA; |
| 310 | #else |
| 311 | #if defined(TC_RVA_RELOC) |
| 312 | r_type = TC_RVA_RELOC; |
| 313 | #else |
| 314 | as_fatal (_("rva not supported")); |
| 315 | #endif |
| 316 | #endif |
| 317 | break; |
| 318 | |
| 319 | case O_uminus: |
| 320 | sub = exp->X_add_symbol; |
| 321 | off = exp->X_add_number; |
| 322 | break; |
| 323 | |
| 324 | case O_subtract: |
| 325 | sub = exp->X_op_symbol; |
| 326 | /* Fall through. */ |
| 327 | case O_symbol: |
| 328 | add = exp->X_add_symbol; |
| 329 | /* Fall through. */ |
| 330 | case O_constant: |
| 331 | off = exp->X_add_number; |
| 332 | break; |
| 333 | |
| 334 | default: |
| 335 | add = make_expr_symbol (exp); |
| 336 | break; |
| 337 | } |
| 338 | |
| 339 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type); |
| 340 | } |
| 341 | |
| 342 | /* Append a string onto another string, bumping the pointer along. */ |
| 343 | void |
| 344 | append (charPP, fromP, length) |
| 345 | char **charPP; |
| 346 | char *fromP; |
| 347 | unsigned long length; |
| 348 | { |
| 349 | /* Don't trust memcpy() of 0 chars. */ |
| 350 | if (length == 0) |
| 351 | return; |
| 352 | |
| 353 | memcpy (*charPP, fromP, length); |
| 354 | *charPP += length; |
| 355 | } |
| 356 | |
| 357 | #ifndef BFD_ASSEMBLER |
| 358 | int section_alignment[SEG_MAXIMUM_ORDINAL]; |
| 359 | #endif |
| 360 | |
| 361 | /* This routine records the largest alignment seen for each segment. |
| 362 | If the beginning of the segment is aligned on the worst-case |
| 363 | boundary, all of the other alignments within it will work. At |
| 364 | least one object format really uses this info. */ |
| 365 | |
| 366 | void |
| 367 | record_alignment (seg, align) |
| 368 | /* Segment to which alignment pertains. */ |
| 369 | segT seg; |
| 370 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte |
| 371 | boundary, etc.) */ |
| 372 | int align; |
| 373 | { |
| 374 | if (seg == absolute_section) |
| 375 | return; |
| 376 | #ifdef BFD_ASSEMBLER |
| 377 | if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg)) |
| 378 | bfd_set_section_alignment (stdoutput, seg, align); |
| 379 | #else |
| 380 | if (align > section_alignment[(int) seg]) |
| 381 | section_alignment[(int) seg] = align; |
| 382 | #endif |
| 383 | } |
| 384 | |
| 385 | #ifdef BFD_ASSEMBLER |
| 386 | |
| 387 | /* Reset the section indices after removing the gas created sections. */ |
| 388 | |
| 389 | static void |
| 390 | renumber_sections (abfd, sec, countparg) |
| 391 | bfd *abfd ATTRIBUTE_UNUSED; |
| 392 | asection *sec; |
| 393 | PTR countparg; |
| 394 | { |
| 395 | int *countp = (int *) countparg; |
| 396 | |
| 397 | sec->index = *countp; |
| 398 | ++*countp; |
| 399 | } |
| 400 | |
| 401 | #endif /* defined (BFD_ASSEMBLER) */ |
| 402 | |
| 403 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) |
| 404 | |
| 405 | static fragS * |
| 406 | chain_frchains_together_1 (section, frchp) |
| 407 | segT section; |
| 408 | struct frchain *frchp; |
| 409 | { |
| 410 | fragS dummy, *prev_frag = &dummy; |
| 411 | #ifdef BFD_ASSEMBLER |
| 412 | fixS fix_dummy, *prev_fix = &fix_dummy; |
| 413 | #endif |
| 414 | |
| 415 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) |
| 416 | { |
| 417 | prev_frag->fr_next = frchp->frch_root; |
| 418 | prev_frag = frchp->frch_last; |
| 419 | assert (prev_frag->fr_type != 0); |
| 420 | #ifdef BFD_ASSEMBLER |
| 421 | if (frchp->fix_root != (fixS *) NULL) |
| 422 | { |
| 423 | if (seg_info (section)->fix_root == (fixS *) NULL) |
| 424 | seg_info (section)->fix_root = frchp->fix_root; |
| 425 | prev_fix->fx_next = frchp->fix_root; |
| 426 | seg_info (section)->fix_tail = frchp->fix_tail; |
| 427 | prev_fix = frchp->fix_tail; |
| 428 | } |
| 429 | #endif |
| 430 | } |
| 431 | assert (prev_frag->fr_type != 0); |
| 432 | prev_frag->fr_next = 0; |
| 433 | return prev_frag; |
| 434 | } |
| 435 | |
| 436 | #endif |
| 437 | |
| 438 | #ifdef BFD_ASSEMBLER |
| 439 | |
| 440 | static void |
| 441 | chain_frchains_together (abfd, section, xxx) |
| 442 | bfd *abfd ATTRIBUTE_UNUSED; |
| 443 | segT section; |
| 444 | PTR xxx ATTRIBUTE_UNUSED; |
| 445 | { |
| 446 | segment_info_type *info; |
| 447 | |
| 448 | /* BFD may have introduced its own sections without using |
| 449 | subseg_new, so it is possible that seg_info is NULL. */ |
| 450 | info = seg_info (section); |
| 451 | if (info != (segment_info_type *) NULL) |
| 452 | info->frchainP->frch_last |
| 453 | = chain_frchains_together_1 (section, info->frchainP); |
| 454 | |
| 455 | /* Now that we've chained the frags together, we must add new fixups |
| 456 | to the segment, not to the frag chain. */ |
| 457 | frags_chained = 1; |
| 458 | } |
| 459 | |
| 460 | #endif |
| 461 | |
| 462 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) |
| 463 | |
| 464 | static void |
| 465 | remove_subsegs (head, seg, root, last) |
| 466 | frchainS *head; |
| 467 | int seg; |
| 468 | fragS **root; |
| 469 | fragS **last; |
| 470 | { |
| 471 | *root = head->frch_root; |
| 472 | *last = chain_frchains_together_1 (seg, head); |
| 473 | } |
| 474 | |
| 475 | #endif /* BFD */ |
| 476 | |
| 477 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
| 478 | |
| 479 | #ifdef BFD_ASSEMBLER |
| 480 | static void |
| 481 | cvt_frag_to_fill (sec, fragP) |
| 482 | segT sec ATTRIBUTE_UNUSED; |
| 483 | fragS *fragP; |
| 484 | #else |
| 485 | static void |
| 486 | cvt_frag_to_fill (headersP, sec, fragP) |
| 487 | object_headers *headersP; |
| 488 | segT sec; |
| 489 | fragS *fragP; |
| 490 | #endif |
| 491 | { |
| 492 | switch (fragP->fr_type) |
| 493 | { |
| 494 | case rs_align: |
| 495 | case rs_align_code: |
| 496 | case rs_org: |
| 497 | case rs_space: |
| 498 | #ifdef HANDLE_ALIGN |
| 499 | HANDLE_ALIGN (fragP); |
| 500 | #endif |
| 501 | know (fragP->fr_next != NULL); |
| 502 | fragP->fr_offset = (fragP->fr_next->fr_address |
| 503 | - fragP->fr_address |
| 504 | - fragP->fr_fix) / fragP->fr_var; |
| 505 | if (fragP->fr_offset < 0) |
| 506 | { |
| 507 | as_bad_where (fragP->fr_file, fragP->fr_line, |
| 508 | _("attempt to .org/.space backwards? (%ld)"), |
| 509 | (long) fragP->fr_offset); |
| 510 | } |
| 511 | fragP->fr_type = rs_fill; |
| 512 | break; |
| 513 | |
| 514 | case rs_fill: |
| 515 | break; |
| 516 | |
| 517 | case rs_leb128: |
| 518 | { |
| 519 | valueT value = S_GET_VALUE (fragP->fr_symbol); |
| 520 | int size; |
| 521 | |
| 522 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
| 523 | fragP->fr_subtype); |
| 524 | |
| 525 | fragP->fr_fix += size; |
| 526 | fragP->fr_type = rs_fill; |
| 527 | fragP->fr_var = 0; |
| 528 | fragP->fr_offset = 0; |
| 529 | fragP->fr_symbol = NULL; |
| 530 | } |
| 531 | break; |
| 532 | |
| 533 | case rs_cfa: |
| 534 | eh_frame_convert_frag (fragP); |
| 535 | break; |
| 536 | |
| 537 | case rs_machine_dependent: |
| 538 | #ifdef BFD_ASSEMBLER |
| 539 | md_convert_frag (stdoutput, sec, fragP); |
| 540 | #else |
| 541 | md_convert_frag (headersP, sec, fragP); |
| 542 | #endif |
| 543 | |
| 544 | assert (fragP->fr_next == NULL |
| 545 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) |
| 546 | == fragP->fr_fix)); |
| 547 | |
| 548 | /* After md_convert_frag, we make the frag into a ".space 0". |
| 549 | md_convert_frag() should set up any fixSs and constants |
| 550 | required. */ |
| 551 | frag_wane (fragP); |
| 552 | break; |
| 553 | |
| 554 | #ifndef WORKING_DOT_WORD |
| 555 | case rs_broken_word: |
| 556 | { |
| 557 | struct broken_word *lie; |
| 558 | |
| 559 | if (fragP->fr_subtype) |
| 560 | { |
| 561 | fragP->fr_fix += md_short_jump_size; |
| 562 | for (lie = (struct broken_word *) (fragP->fr_symbol); |
| 563 | lie && lie->dispfrag == fragP; |
| 564 | lie = lie->next_broken_word) |
| 565 | if (lie->added == 1) |
| 566 | fragP->fr_fix += md_long_jump_size; |
| 567 | } |
| 568 | frag_wane (fragP); |
| 569 | } |
| 570 | break; |
| 571 | #endif |
| 572 | |
| 573 | default: |
| 574 | BAD_CASE (fragP->fr_type); |
| 575 | break; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
| 580 | |
| 581 | #ifdef BFD_ASSEMBLER |
| 582 | static void |
| 583 | relax_and_size_seg (abfd, sec, xxx) |
| 584 | bfd *abfd; |
| 585 | asection *sec; |
| 586 | PTR xxx ATTRIBUTE_UNUSED; |
| 587 | { |
| 588 | flagword flags; |
| 589 | fragS *fragp; |
| 590 | segment_info_type *seginfo; |
| 591 | int x; |
| 592 | valueT size, newsize; |
| 593 | |
| 594 | subseg_change (sec, 0); |
| 595 | |
| 596 | flags = bfd_get_section_flags (abfd, sec); |
| 597 | |
| 598 | seginfo = seg_info (sec); |
| 599 | if (seginfo && seginfo->frchainP) |
| 600 | { |
| 601 | relax_segment (seginfo->frchainP->frch_root, sec); |
| 602 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
| 603 | cvt_frag_to_fill (sec, fragp); |
| 604 | for (fragp = seginfo->frchainP->frch_root; |
| 605 | fragp->fr_next; |
| 606 | fragp = fragp->fr_next) |
| 607 | /* Walk to last elt. */ |
| 608 | ; |
| 609 | size = fragp->fr_address + fragp->fr_fix; |
| 610 | } |
| 611 | else |
| 612 | size = 0; |
| 613 | |
| 614 | if (size > 0 && ! seginfo->bss) |
| 615 | flags |= SEC_HAS_CONTENTS; |
| 616 | |
| 617 | /* @@ This is just an approximation. */ |
| 618 | if (seginfo && seginfo->fix_root) |
| 619 | flags |= SEC_RELOC; |
| 620 | else |
| 621 | flags &= ~SEC_RELOC; |
| 622 | x = bfd_set_section_flags (abfd, sec, flags); |
| 623 | assert (x == true); |
| 624 | |
| 625 | newsize = md_section_align (sec, size); |
| 626 | x = bfd_set_section_size (abfd, sec, newsize); |
| 627 | assert (x == true); |
| 628 | |
| 629 | /* If the size had to be rounded up, add some padding in the last |
| 630 | non-empty frag. */ |
| 631 | assert (newsize >= size); |
| 632 | if (size != newsize) |
| 633 | { |
| 634 | fragS *last = seginfo->frchainP->frch_last; |
| 635 | fragp = seginfo->frchainP->frch_root; |
| 636 | while (fragp->fr_next != last) |
| 637 | fragp = fragp->fr_next; |
| 638 | last->fr_address = size; |
| 639 | fragp->fr_offset += newsize - size; |
| 640 | } |
| 641 | |
| 642 | #ifdef tc_frob_section |
| 643 | tc_frob_section (sec); |
| 644 | #endif |
| 645 | #ifdef obj_frob_section |
| 646 | obj_frob_section (sec); |
| 647 | #endif |
| 648 | } |
| 649 | |
| 650 | #ifdef DEBUG2 |
| 651 | static void |
| 652 | dump_section_relocs (abfd, sec, stream_) |
| 653 | bfd *abfd ATTRIBUTE_UNUSED; |
| 654 | asection *sec; |
| 655 | char *stream_; |
| 656 | { |
| 657 | FILE *stream = (FILE *) stream_; |
| 658 | segment_info_type *seginfo = seg_info (sec); |
| 659 | fixS *fixp = seginfo->fix_root; |
| 660 | |
| 661 | if (!fixp) |
| 662 | return; |
| 663 | |
| 664 | fprintf (stream, "sec %s relocs:\n", sec->name); |
| 665 | while (fixp) |
| 666 | { |
| 667 | symbolS *s = fixp->fx_addsy; |
| 668 | |
| 669 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, |
| 670 | (int) fixp->fx_r_type); |
| 671 | if (s == NULL) |
| 672 | fprintf (stream, "no sym\n"); |
| 673 | else |
| 674 | { |
| 675 | print_symbol_value_1 (stream, s); |
| 676 | fprintf (stream, "\n"); |
| 677 | } |
| 678 | fixp = fixp->fx_next; |
| 679 | } |
| 680 | } |
| 681 | #else |
| 682 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) |
| 683 | #endif |
| 684 | |
| 685 | #ifndef EMIT_SECTION_SYMBOLS |
| 686 | #define EMIT_SECTION_SYMBOLS 1 |
| 687 | #endif |
| 688 | |
| 689 | static void |
| 690 | adjust_reloc_syms (abfd, sec, xxx) |
| 691 | bfd *abfd ATTRIBUTE_UNUSED; |
| 692 | asection *sec; |
| 693 | PTR xxx ATTRIBUTE_UNUSED; |
| 694 | { |
| 695 | segment_info_type *seginfo = seg_info (sec); |
| 696 | fixS *fixp; |
| 697 | |
| 698 | if (seginfo == NULL) |
| 699 | return; |
| 700 | |
| 701 | dump_section_relocs (abfd, sec, stderr); |
| 702 | |
| 703 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
| 704 | if (fixp->fx_done) |
| 705 | /* Ignore it. */ |
| 706 | ; |
| 707 | else if (fixp->fx_addsy) |
| 708 | { |
| 709 | symbolS *sym; |
| 710 | asection *symsec; |
| 711 | |
| 712 | #ifdef DEBUG5 |
| 713 | fprintf (stderr, "\n\nadjusting fixup:\n"); |
| 714 | print_fixup (fixp); |
| 715 | #endif |
| 716 | |
| 717 | sym = fixp->fx_addsy; |
| 718 | |
| 719 | /* All symbols should have already been resolved at this |
| 720 | point. It is possible to see unresolved expression |
| 721 | symbols, though, since they are not in the regular symbol |
| 722 | table. */ |
| 723 | if (sym != NULL) |
| 724 | resolve_symbol_value (sym, 1); |
| 725 | |
| 726 | if (fixp->fx_subsy != NULL) |
| 727 | resolve_symbol_value (fixp->fx_subsy, 1); |
| 728 | |
| 729 | /* If this symbol is equated to an undefined symbol, convert |
| 730 | the fixup to being against that symbol. */ |
| 731 | if (sym != NULL && symbol_equated_p (sym) |
| 732 | && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym))) |
| 733 | { |
| 734 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
| 735 | sym = symbol_get_value_expression (sym)->X_add_symbol; |
| 736 | fixp->fx_addsy = sym; |
| 737 | } |
| 738 | |
| 739 | if (sym != NULL && symbol_mri_common_p (sym)) |
| 740 | { |
| 741 | /* These symbols are handled specially in fixup_segment. */ |
| 742 | goto done; |
| 743 | } |
| 744 | |
| 745 | symsec = S_GET_SEGMENT (sym); |
| 746 | |
| 747 | if (symsec == NULL) |
| 748 | abort (); |
| 749 | |
| 750 | if (bfd_is_abs_section (symsec)) |
| 751 | { |
| 752 | /* The fixup_segment routine will not use this symbol in a |
| 753 | relocation unless TC_FORCE_RELOCATION returns 1. */ |
| 754 | if (TC_FORCE_RELOCATION (fixp)) |
| 755 | { |
| 756 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 757 | #ifdef UNDEFINED_DIFFERENCE_OK |
| 758 | if (fixp->fx_subsy != NULL) |
| 759 | symbol_mark_used_in_reloc (fixp->fx_subsy); |
| 760 | #endif |
| 761 | } |
| 762 | goto done; |
| 763 | } |
| 764 | |
| 765 | /* If it's one of these sections, assume the symbol is |
| 766 | definitely going to be output. The code in |
| 767 | md_estimate_size_before_relax in tc-mips.c uses this test |
| 768 | as well, so if you change this code you should look at that |
| 769 | code. */ |
| 770 | if (bfd_is_und_section (symsec) |
| 771 | || bfd_is_com_section (symsec)) |
| 772 | { |
| 773 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 774 | #ifdef UNDEFINED_DIFFERENCE_OK |
| 775 | /* We have the difference of an undefined symbol and some |
| 776 | other symbol. Make sure to mark the other symbol as used |
| 777 | in a relocation so that it will always be output. */ |
| 778 | if (fixp->fx_subsy) |
| 779 | symbol_mark_used_in_reloc (fixp->fx_subsy); |
| 780 | #endif |
| 781 | goto done; |
| 782 | } |
| 783 | |
| 784 | /* Don't try to reduce relocs which refer to non-local symbols |
| 785 | in .linkonce sections. It can lead to confusion when a |
| 786 | debugging section refers to a .linkonce section. I hope |
| 787 | this will always be correct. */ |
| 788 | if (symsec != sec && ! S_IS_LOCAL (sym)) |
| 789 | { |
| 790 | boolean linkonce; |
| 791 | |
| 792 | linkonce = false; |
| 793 | #ifdef BFD_ASSEMBLER |
| 794 | if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE) |
| 795 | != 0) |
| 796 | linkonce = true; |
| 797 | #endif |
| 798 | #ifdef OBJ_ELF |
| 799 | /* The GNU toolchain uses an extension for ELF: a section |
| 800 | beginning with the magic string .gnu.linkonce is a |
| 801 | linkonce section. */ |
| 802 | if (strncmp (segment_name (symsec), ".gnu.linkonce", |
| 803 | sizeof ".gnu.linkonce" - 1) == 0) |
| 804 | linkonce = true; |
| 805 | #endif |
| 806 | |
| 807 | if (linkonce) |
| 808 | { |
| 809 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 810 | #ifdef UNDEFINED_DIFFERENCE_OK |
| 811 | if (fixp->fx_subsy != NULL) |
| 812 | symbol_mark_used_in_reloc (fixp->fx_subsy); |
| 813 | #endif |
| 814 | goto done; |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | /* Since we're reducing to section symbols, don't attempt to reduce |
| 819 | anything that's already using one. */ |
| 820 | if (symbol_section_p (sym)) |
| 821 | { |
| 822 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 823 | goto done; |
| 824 | } |
| 825 | |
| 826 | #ifdef BFD_ASSEMBLER |
| 827 | /* We can never adjust a reloc against a weak symbol. If we |
| 828 | did, and the weak symbol was overridden by a real symbol |
| 829 | somewhere else, then our relocation would be pointing at |
| 830 | the wrong area of memory. */ |
| 831 | if (S_IS_WEAK (sym)) |
| 832 | { |
| 833 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 834 | goto done; |
| 835 | } |
| 836 | #endif |
| 837 | |
| 838 | /* Is there some other reason we can't adjust this one? (E.g., |
| 839 | call/bal links in i960-bout symbols.) */ |
| 840 | #ifdef obj_fix_adjustable |
| 841 | if (! obj_fix_adjustable (fixp)) |
| 842 | { |
| 843 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 844 | goto done; |
| 845 | } |
| 846 | #endif |
| 847 | |
| 848 | /* Is there some other (target cpu dependent) reason we can't adjust |
| 849 | this one? (E.g. relocations involving function addresses on |
| 850 | the PA. */ |
| 851 | #ifdef tc_fix_adjustable |
| 852 | if (! tc_fix_adjustable (fixp)) |
| 853 | { |
| 854 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 855 | goto done; |
| 856 | } |
| 857 | #endif |
| 858 | |
| 859 | /* If the section symbol isn't going to be output, the relocs |
| 860 | at least should still work. If not, figure out what to do |
| 861 | when we run into that case. |
| 862 | |
| 863 | We refetch the segment when calling section_symbol, rather |
| 864 | than using symsec, because S_GET_VALUE may wind up changing |
| 865 | the section when it calls resolve_symbol_value. */ |
| 866 | fixp->fx_offset += S_GET_VALUE (sym); |
| 867 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); |
| 868 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
| 869 | #ifdef DEBUG5 |
| 870 | fprintf (stderr, "\nadjusted fixup:\n"); |
| 871 | print_fixup (fixp); |
| 872 | #endif |
| 873 | |
| 874 | done: |
| 875 | ; |
| 876 | } |
| 877 | #if 1 /* def RELOC_REQUIRES_SYMBOL */ |
| 878 | else |
| 879 | { |
| 880 | /* There was no symbol required by this relocation. However, |
| 881 | BFD doesn't really handle relocations without symbols well. |
| 882 | (At least, the COFF support doesn't.) So for now we fake up |
| 883 | a local symbol in the absolute section. */ |
| 884 | |
| 885 | fixp->fx_addsy = section_symbol (absolute_section); |
| 886 | #if 0 |
| 887 | fixp->fx_addsy->sy_used_in_reloc = 1; |
| 888 | #endif |
| 889 | } |
| 890 | #endif |
| 891 | |
| 892 | dump_section_relocs (abfd, sec, stderr); |
| 893 | } |
| 894 | |
| 895 | static void |
| 896 | write_relocs (abfd, sec, xxx) |
| 897 | bfd *abfd; |
| 898 | asection *sec; |
| 899 | PTR xxx ATTRIBUTE_UNUSED; |
| 900 | { |
| 901 | segment_info_type *seginfo = seg_info (sec); |
| 902 | unsigned int i; |
| 903 | unsigned int n; |
| 904 | arelent **relocs; |
| 905 | fixS *fixp; |
| 906 | char *err; |
| 907 | |
| 908 | /* If seginfo is NULL, we did not create this section; don't do |
| 909 | anything with it. */ |
| 910 | if (seginfo == NULL) |
| 911 | return; |
| 912 | |
| 913 | fixup_segment (seginfo->fix_root, sec); |
| 914 | |
| 915 | n = 0; |
| 916 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
| 917 | n++; |
| 918 | |
| 919 | #ifndef RELOC_EXPANSION_POSSIBLE |
| 920 | /* Set up reloc information as well. */ |
| 921 | relocs = (arelent **) xmalloc (n * sizeof (arelent *)); |
| 922 | memset ((char *) relocs, 0, n * sizeof (arelent *)); |
| 923 | |
| 924 | i = 0; |
| 925 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
| 926 | { |
| 927 | arelent *reloc; |
| 928 | bfd_reloc_status_type s; |
| 929 | symbolS *sym; |
| 930 | |
| 931 | if (fixp->fx_done) |
| 932 | { |
| 933 | n--; |
| 934 | continue; |
| 935 | } |
| 936 | |
| 937 | /* If this is an undefined symbol which was equated to another |
| 938 | symbol, then use generate the reloc against the latter symbol |
| 939 | rather than the former. */ |
| 940 | sym = fixp->fx_addsy; |
| 941 | while (symbol_equated_p (sym) |
| 942 | && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym))) |
| 943 | { |
| 944 | symbolS *n; |
| 945 | |
| 946 | /* We must avoid looping, as that can occur with a badly |
| 947 | written program. */ |
| 948 | n = symbol_get_value_expression (sym)->X_add_symbol; |
| 949 | if (n == sym) |
| 950 | break; |
| 951 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
| 952 | sym = n; |
| 953 | } |
| 954 | fixp->fx_addsy = sym; |
| 955 | |
| 956 | reloc = tc_gen_reloc (sec, fixp); |
| 957 | if (!reloc) |
| 958 | { |
| 959 | n--; |
| 960 | continue; |
| 961 | } |
| 962 | |
| 963 | #if 0 |
| 964 | /* This test is triggered inappropriately for the SH. */ |
| 965 | if (fixp->fx_where + fixp->fx_size |
| 966 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
| 967 | abort (); |
| 968 | #endif |
| 969 | |
| 970 | s = bfd_install_relocation (stdoutput, reloc, |
| 971 | fixp->fx_frag->fr_literal, |
| 972 | fixp->fx_frag->fr_address, |
| 973 | sec, &err); |
| 974 | switch (s) |
| 975 | { |
| 976 | case bfd_reloc_ok: |
| 977 | break; |
| 978 | case bfd_reloc_overflow: |
| 979 | as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow")); |
| 980 | break; |
| 981 | case bfd_reloc_outofrange: |
| 982 | as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range")); |
| 983 | break; |
| 984 | default: |
| 985 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), |
| 986 | fixp->fx_file, fixp->fx_line, s); |
| 987 | } |
| 988 | relocs[i++] = reloc; |
| 989 | } |
| 990 | #else |
| 991 | n = n * MAX_RELOC_EXPANSION; |
| 992 | /* Set up reloc information as well. */ |
| 993 | relocs = (arelent **) xmalloc (n * sizeof (arelent *)); |
| 994 | |
| 995 | i = 0; |
| 996 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
| 997 | { |
| 998 | arelent **reloc; |
| 999 | char *data; |
| 1000 | bfd_reloc_status_type s; |
| 1001 | symbolS *sym; |
| 1002 | int j; |
| 1003 | |
| 1004 | if (fixp->fx_done) |
| 1005 | { |
| 1006 | n--; |
| 1007 | continue; |
| 1008 | } |
| 1009 | |
| 1010 | /* If this is an undefined symbol which was equated to another |
| 1011 | symbol, then generate the reloc against the latter symbol |
| 1012 | rather than the former. */ |
| 1013 | sym = fixp->fx_addsy; |
| 1014 | while (symbol_equated_p (sym) |
| 1015 | && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym))) |
| 1016 | sym = symbol_get_value_expression (sym)->X_add_symbol; |
| 1017 | fixp->fx_addsy = sym; |
| 1018 | |
| 1019 | reloc = tc_gen_reloc (sec, fixp); |
| 1020 | |
| 1021 | for (j = 0; reloc[j]; j++) |
| 1022 | { |
| 1023 | relocs[i++] = reloc[j]; |
| 1024 | assert (i <= n); |
| 1025 | } |
| 1026 | data = fixp->fx_frag->fr_literal + fixp->fx_where; |
| 1027 | if (fixp->fx_where + fixp->fx_size |
| 1028 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
| 1029 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1030 | _("internal error: fixup not contained within frag")); |
| 1031 | for (j = 0; reloc[j]; j++) |
| 1032 | { |
| 1033 | s = bfd_install_relocation (stdoutput, reloc[j], |
| 1034 | fixp->fx_frag->fr_literal, |
| 1035 | fixp->fx_frag->fr_address, |
| 1036 | sec, &err); |
| 1037 | switch (s) |
| 1038 | { |
| 1039 | case bfd_reloc_ok: |
| 1040 | break; |
| 1041 | case bfd_reloc_overflow: |
| 1042 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1043 | _("relocation overflow")); |
| 1044 | break; |
| 1045 | default: |
| 1046 | as_fatal (_("%s:%u: bad return from bfd_install_relocation"), |
| 1047 | fixp->fx_file, fixp->fx_line); |
| 1048 | } |
| 1049 | } |
| 1050 | } |
| 1051 | n = i; |
| 1052 | #endif |
| 1053 | |
| 1054 | #ifdef DEBUG4 |
| 1055 | { |
| 1056 | int i, j, nsyms; |
| 1057 | asymbol **sympp; |
| 1058 | sympp = bfd_get_outsymbols (stdoutput); |
| 1059 | nsyms = bfd_get_symcount (stdoutput); |
| 1060 | for (i = 0; i < n; i++) |
| 1061 | if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) |
| 1062 | { |
| 1063 | for (j = 0; j < nsyms; j++) |
| 1064 | if (sympp[j] == *relocs[i]->sym_ptr_ptr) |
| 1065 | break; |
| 1066 | if (j == nsyms) |
| 1067 | abort (); |
| 1068 | } |
| 1069 | } |
| 1070 | #endif |
| 1071 | |
| 1072 | if (n) |
| 1073 | bfd_set_reloc (stdoutput, sec, relocs, n); |
| 1074 | else |
| 1075 | bfd_set_section_flags (abfd, sec, |
| 1076 | (bfd_get_section_flags (abfd, sec) |
| 1077 | & (flagword) ~SEC_RELOC)); |
| 1078 | |
| 1079 | #ifdef SET_SECTION_RELOCS |
| 1080 | SET_SECTION_RELOCS (sec, relocs, n); |
| 1081 | #endif |
| 1082 | |
| 1083 | #ifdef DEBUG3 |
| 1084 | { |
| 1085 | int i; |
| 1086 | arelent *r; |
| 1087 | asymbol *s; |
| 1088 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
| 1089 | for (i = 0; i < n; i++) |
| 1090 | { |
| 1091 | r = relocs[i]; |
| 1092 | s = *r->sym_ptr_ptr; |
| 1093 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", |
| 1094 | i, r, r->address, s->name, r->addend); |
| 1095 | } |
| 1096 | } |
| 1097 | #endif |
| 1098 | } |
| 1099 | |
| 1100 | static void |
| 1101 | write_contents (abfd, sec, xxx) |
| 1102 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1103 | asection *sec; |
| 1104 | PTR xxx ATTRIBUTE_UNUSED; |
| 1105 | { |
| 1106 | segment_info_type *seginfo = seg_info (sec); |
| 1107 | unsigned long offset = 0; |
| 1108 | fragS *f; |
| 1109 | |
| 1110 | /* Write out the frags. */ |
| 1111 | if (seginfo == NULL |
| 1112 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
| 1113 | return; |
| 1114 | |
| 1115 | for (f = seginfo->frchainP->frch_root; |
| 1116 | f; |
| 1117 | f = f->fr_next) |
| 1118 | { |
| 1119 | int x; |
| 1120 | unsigned long fill_size; |
| 1121 | char *fill_literal; |
| 1122 | long count; |
| 1123 | |
| 1124 | assert (f->fr_type == rs_fill); |
| 1125 | if (f->fr_fix) |
| 1126 | { |
| 1127 | x = bfd_set_section_contents (stdoutput, sec, |
| 1128 | f->fr_literal, (file_ptr) offset, |
| 1129 | (bfd_size_type) f->fr_fix); |
| 1130 | if (x == false) |
| 1131 | { |
| 1132 | bfd_perror (stdoutput->filename); |
| 1133 | as_perror (_("FATAL: Can't write %s"), stdoutput->filename); |
| 1134 | exit (EXIT_FAILURE); |
| 1135 | } |
| 1136 | offset += f->fr_fix; |
| 1137 | } |
| 1138 | fill_literal = f->fr_literal + f->fr_fix; |
| 1139 | fill_size = f->fr_var; |
| 1140 | count = f->fr_offset; |
| 1141 | assert (count >= 0); |
| 1142 | if (fill_size && count) |
| 1143 | { |
| 1144 | char buf[256]; |
| 1145 | if (fill_size > sizeof (buf)) |
| 1146 | { |
| 1147 | /* Do it the old way. Can this ever happen? */ |
| 1148 | while (count--) |
| 1149 | { |
| 1150 | x = bfd_set_section_contents (stdoutput, sec, |
| 1151 | fill_literal, |
| 1152 | (file_ptr) offset, |
| 1153 | (bfd_size_type) fill_size); |
| 1154 | if (x == false) |
| 1155 | { |
| 1156 | bfd_perror (stdoutput->filename); |
| 1157 | as_perror (_("FATAL: Can't write %s"), |
| 1158 | stdoutput->filename); |
| 1159 | exit (EXIT_FAILURE); |
| 1160 | } |
| 1161 | offset += fill_size; |
| 1162 | } |
| 1163 | } |
| 1164 | else |
| 1165 | { |
| 1166 | /* Build a buffer full of fill objects and output it as |
| 1167 | often as necessary. This saves on the overhead of |
| 1168 | potentially lots of bfd_set_section_contents calls. */ |
| 1169 | int n_per_buf, i; |
| 1170 | if (fill_size == 1) |
| 1171 | { |
| 1172 | n_per_buf = sizeof (buf); |
| 1173 | memset (buf, *fill_literal, n_per_buf); |
| 1174 | } |
| 1175 | else |
| 1176 | { |
| 1177 | char *bufp; |
| 1178 | n_per_buf = sizeof (buf) / fill_size; |
| 1179 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
| 1180 | memcpy (bufp, fill_literal, fill_size); |
| 1181 | } |
| 1182 | for (; count > 0; count -= n_per_buf) |
| 1183 | { |
| 1184 | n_per_buf = n_per_buf > count ? count : n_per_buf; |
| 1185 | x = bfd_set_section_contents |
| 1186 | (stdoutput, sec, buf, (file_ptr) offset, |
| 1187 | (bfd_size_type) n_per_buf * fill_size); |
| 1188 | if (x != true) |
| 1189 | as_fatal (_("Cannot write to output file.")); |
| 1190 | offset += n_per_buf * fill_size; |
| 1191 | } |
| 1192 | } |
| 1193 | } |
| 1194 | } |
| 1195 | } |
| 1196 | #endif |
| 1197 | |
| 1198 | #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) |
| 1199 | static void |
| 1200 | merge_data_into_text () |
| 1201 | { |
| 1202 | #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) |
| 1203 | seg_info (text_section)->frchainP->frch_last->fr_next = |
| 1204 | seg_info (data_section)->frchainP->frch_root; |
| 1205 | seg_info (text_section)->frchainP->frch_last = |
| 1206 | seg_info (data_section)->frchainP->frch_last; |
| 1207 | seg_info (data_section)->frchainP = 0; |
| 1208 | #else |
| 1209 | fixS *tmp; |
| 1210 | |
| 1211 | text_last_frag->fr_next = data_frag_root; |
| 1212 | text_last_frag = data_last_frag; |
| 1213 | data_last_frag = NULL; |
| 1214 | data_frag_root = NULL; |
| 1215 | if (text_fix_root) |
| 1216 | { |
| 1217 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; |
| 1218 | tmp->fx_next = data_fix_root; |
| 1219 | text_fix_tail = data_fix_tail; |
| 1220 | } |
| 1221 | else |
| 1222 | text_fix_root = data_fix_root; |
| 1223 | data_fix_root = NULL; |
| 1224 | #endif |
| 1225 | } |
| 1226 | #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
| 1227 | |
| 1228 | #if !defined (BFD_ASSEMBLER) && !defined (BFD) |
| 1229 | static void |
| 1230 | relax_and_size_all_segments () |
| 1231 | { |
| 1232 | fragS *fragP; |
| 1233 | |
| 1234 | relax_segment (text_frag_root, SEG_TEXT); |
| 1235 | relax_segment (data_frag_root, SEG_DATA); |
| 1236 | relax_segment (bss_frag_root, SEG_BSS); |
| 1237 | |
| 1238 | /* Now the addresses of frags are correct within the segment. */ |
| 1239 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); |
| 1240 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); |
| 1241 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); |
| 1242 | |
| 1243 | /* Join the 2 segments into 1 huge segment. |
| 1244 | To do this, re-compute every rn_address in the SEG_DATA frags. |
| 1245 | Then join the data frags after the text frags. |
| 1246 | |
| 1247 | Determine a_data [length of data segment]. */ |
| 1248 | if (data_frag_root) |
| 1249 | { |
| 1250 | register relax_addressT slide; |
| 1251 | |
| 1252 | know ((text_last_frag->fr_type == rs_fill) |
| 1253 | && (text_last_frag->fr_offset == 0)); |
| 1254 | |
| 1255 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); |
| 1256 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); |
| 1257 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ |
| 1258 | #ifdef OBJ_BOUT |
| 1259 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) |
| 1260 | /* For b.out: If the data section has a strict alignment |
| 1261 | requirement, its load address in the .o file will be |
| 1262 | rounded up from the size of the text section. These |
| 1263 | two values are *not* the same! Similarly for the bss |
| 1264 | section.... */ |
| 1265 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); |
| 1266 | #endif |
| 1267 | |
| 1268 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) |
| 1269 | fragP->fr_address += slide; |
| 1270 | |
| 1271 | know (text_last_frag != 0); |
| 1272 | text_last_frag->fr_next = data_frag_root; |
| 1273 | } |
| 1274 | else |
| 1275 | { |
| 1276 | H_SET_DATA_SIZE (&headers, 0); |
| 1277 | } |
| 1278 | |
| 1279 | #ifdef OBJ_BOUT |
| 1280 | /* See above comments on b.out data section address. */ |
| 1281 | { |
| 1282 | long bss_vma; |
| 1283 | if (data_last_frag == 0) |
| 1284 | bss_vma = H_GET_TEXT_SIZE (&headers); |
| 1285 | else |
| 1286 | bss_vma = data_last_frag->fr_address; |
| 1287 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); |
| 1288 | bss_address_frag.fr_address = bss_vma; |
| 1289 | } |
| 1290 | #else /* ! OBJ_BOUT */ |
| 1291 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
| 1292 | H_GET_DATA_SIZE (&headers)); |
| 1293 | |
| 1294 | #endif /* ! OBJ_BOUT */ |
| 1295 | |
| 1296 | /* Slide all the frags. */ |
| 1297 | if (bss_frag_root) |
| 1298 | { |
| 1299 | relax_addressT slide = bss_address_frag.fr_address; |
| 1300 | |
| 1301 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) |
| 1302 | fragP->fr_address += slide; |
| 1303 | } |
| 1304 | |
| 1305 | if (bss_last_frag) |
| 1306 | H_SET_BSS_SIZE (&headers, |
| 1307 | bss_last_frag->fr_address - bss_frag_root->fr_address); |
| 1308 | else |
| 1309 | H_SET_BSS_SIZE (&headers, 0); |
| 1310 | } |
| 1311 | #endif /* ! BFD_ASSEMBLER && ! BFD */ |
| 1312 | |
| 1313 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
| 1314 | |
| 1315 | #ifdef BFD_ASSEMBLER |
| 1316 | static void |
| 1317 | set_symtab () |
| 1318 | { |
| 1319 | int nsyms; |
| 1320 | asymbol **asympp; |
| 1321 | symbolS *symp; |
| 1322 | boolean result; |
| 1323 | extern PTR bfd_alloc PARAMS ((bfd *, size_t)); |
| 1324 | |
| 1325 | /* Count symbols. We can't rely on a count made by the loop in |
| 1326 | write_object_file, because *_frob_file may add a new symbol or |
| 1327 | two. */ |
| 1328 | nsyms = 0; |
| 1329 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) |
| 1330 | nsyms++; |
| 1331 | |
| 1332 | if (nsyms) |
| 1333 | { |
| 1334 | int i; |
| 1335 | |
| 1336 | asympp = (asymbol **) bfd_alloc (stdoutput, |
| 1337 | nsyms * sizeof (asymbol *)); |
| 1338 | symp = symbol_rootP; |
| 1339 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) |
| 1340 | { |
| 1341 | asympp[i] = symbol_get_bfdsym (symp); |
| 1342 | symbol_mark_written (symp); |
| 1343 | } |
| 1344 | } |
| 1345 | else |
| 1346 | asympp = 0; |
| 1347 | result = bfd_set_symtab (stdoutput, asympp, nsyms); |
| 1348 | assert (result == true); |
| 1349 | symbol_table_frozen = 1; |
| 1350 | } |
| 1351 | #endif |
| 1352 | |
| 1353 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
| 1354 | static void |
| 1355 | set_segment_vma (abfd, sec, xxx) |
| 1356 | bfd *abfd; |
| 1357 | asection *sec; |
| 1358 | PTR xxx ATTRIBUTE_UNUSED; |
| 1359 | { |
| 1360 | static bfd_vma addr = 0; |
| 1361 | |
| 1362 | bfd_set_section_vma (abfd, sec, addr); |
| 1363 | addr += bfd_section_size (abfd, sec); |
| 1364 | } |
| 1365 | #endif /* BFD_ASSEMBLER && OBJ_COFF && !TE_PE */ |
| 1366 | |
| 1367 | /* Finish the subsegments. After every sub-segment, we fake an |
| 1368 | ".align ...". This conforms to BSD4.2 brane-damage. We then fake |
| 1369 | ".fill 0" because that is the kind of frag that requires least |
| 1370 | thought. ".align" frags like to have a following frag since that |
| 1371 | makes calculating their intended length trivial. */ |
| 1372 | |
| 1373 | #ifndef SUB_SEGMENT_ALIGN |
| 1374 | #ifdef BFD_ASSEMBLER |
| 1375 | #define SUB_SEGMENT_ALIGN(SEG) (0) |
| 1376 | #else |
| 1377 | #define SUB_SEGMENT_ALIGN(SEG) (2) |
| 1378 | #endif |
| 1379 | #endif |
| 1380 | |
| 1381 | void |
| 1382 | subsegs_finish () |
| 1383 | { |
| 1384 | struct frchain *frchainP; |
| 1385 | |
| 1386 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) |
| 1387 | { |
| 1388 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
| 1389 | |
| 1390 | /* This now gets called even if we had errors. In that case, |
| 1391 | any alignment is meaningless, and, moreover, will look weird |
| 1392 | if we are generating a listing. */ |
| 1393 | frag_align (had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg), |
| 1394 | subseg_text_p (now_seg) ? NOP_OPCODE : 0, |
| 1395 | 0); |
| 1396 | |
| 1397 | /* frag_align will have left a new frag. |
| 1398 | Use this last frag for an empty ".fill". |
| 1399 | |
| 1400 | For this segment ... |
| 1401 | Create a last frag. Do not leave a "being filled in frag". */ |
| 1402 | frag_wane (frag_now); |
| 1403 | frag_now->fr_fix = 0; |
| 1404 | know (frag_now->fr_next == NULL); |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | /* Write the object file. */ |
| 1409 | |
| 1410 | void |
| 1411 | write_object_file () |
| 1412 | { |
| 1413 | #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) |
| 1414 | fragS *fragP; /* Track along all frags. */ |
| 1415 | #endif |
| 1416 | |
| 1417 | /* Do we really want to write it? */ |
| 1418 | { |
| 1419 | int n_warns, n_errs; |
| 1420 | n_warns = had_warnings (); |
| 1421 | n_errs = had_errors (); |
| 1422 | /* The -Z flag indicates that an object file should be generated, |
| 1423 | regardless of warnings and errors. */ |
| 1424 | if (flag_always_generate_output) |
| 1425 | { |
| 1426 | if (n_warns || n_errs) |
| 1427 | as_warn (_("%d error%s, %d warning%s, generating bad object file.\n"), |
| 1428 | n_errs, n_errs == 1 ? "" : "s", |
| 1429 | n_warns, n_warns == 1 ? "" : "s"); |
| 1430 | } |
| 1431 | else |
| 1432 | { |
| 1433 | if (n_errs) |
| 1434 | as_fatal (_("%d error%s, %d warning%s, no object file generated.\n"), |
| 1435 | n_errs, n_errs == 1 ? "" : "s", |
| 1436 | n_warns, n_warns == 1 ? "" : "s"); |
| 1437 | } |
| 1438 | } |
| 1439 | |
| 1440 | #ifdef OBJ_VMS |
| 1441 | /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call |
| 1442 | a routine to check for the definition of the procedure "_main", |
| 1443 | and if so -- fix it up so that it can be program entry point. */ |
| 1444 | vms_check_for_main (); |
| 1445 | #endif /* OBJ_VMS */ |
| 1446 | |
| 1447 | /* From now on, we don't care about sub-segments. Build one frag chain |
| 1448 | for each segment. Linked thru fr_next. */ |
| 1449 | |
| 1450 | #ifdef BFD_ASSEMBLER |
| 1451 | /* Remove the sections created by gas for its own purposes. */ |
| 1452 | { |
| 1453 | asection **seclist, *sec; |
| 1454 | int i; |
| 1455 | |
| 1456 | seclist = &stdoutput->sections; |
| 1457 | while (seclist && *seclist) |
| 1458 | { |
| 1459 | sec = *seclist; |
| 1460 | while (sec == reg_section || sec == expr_section) |
| 1461 | { |
| 1462 | sec = sec->next; |
| 1463 | *seclist = sec; |
| 1464 | stdoutput->section_count--; |
| 1465 | if (!sec) |
| 1466 | break; |
| 1467 | } |
| 1468 | if (*seclist) |
| 1469 | seclist = &(*seclist)->next; |
| 1470 | } |
| 1471 | i = 0; |
| 1472 | bfd_map_over_sections (stdoutput, renumber_sections, &i); |
| 1473 | } |
| 1474 | |
| 1475 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); |
| 1476 | #else |
| 1477 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); |
| 1478 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); |
| 1479 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); |
| 1480 | #endif |
| 1481 | |
| 1482 | /* We have two segments. If user gave -R flag, then we must put the |
| 1483 | data frags into the text segment. Do this before relaxing so |
| 1484 | we know to take advantage of -R and make shorter addresses. */ |
| 1485 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) |
| 1486 | if (flag_readonly_data_in_text) |
| 1487 | { |
| 1488 | merge_data_into_text (); |
| 1489 | } |
| 1490 | #endif |
| 1491 | |
| 1492 | #ifdef BFD_ASSEMBLER |
| 1493 | bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0); |
| 1494 | #else |
| 1495 | relax_and_size_all_segments (); |
| 1496 | #endif /* BFD_ASSEMBLER */ |
| 1497 | |
| 1498 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
| 1499 | /* Now that the segments have their final sizes, run through the |
| 1500 | sections and set their vma and lma. !BFD gas sets them, and BFD gas |
| 1501 | should too. Currently, only DJGPP uses this code, but other |
| 1502 | COFF targets may need to execute this too. */ |
| 1503 | bfd_map_over_sections (stdoutput, set_segment_vma, (char *) 0); |
| 1504 | #endif |
| 1505 | |
| 1506 | #ifndef BFD_ASSEMBLER |
| 1507 | /* Crawl the symbol chain. |
| 1508 | |
| 1509 | For each symbol whose value depends on a frag, take the address of |
| 1510 | that frag and subsume it into the value of the symbol. |
| 1511 | After this, there is just one way to lookup a symbol value. |
| 1512 | Values are left in their final state for object file emission. |
| 1513 | We adjust the values of 'L' local symbols, even if we do |
| 1514 | not intend to emit them to the object file, because their values |
| 1515 | are needed for fix-ups. |
| 1516 | |
| 1517 | Unless we saw a -L flag, remove all symbols that begin with 'L' |
| 1518 | from the symbol chain. (They are still pointed to by the fixes.) |
| 1519 | |
| 1520 | Count the remaining symbols. |
| 1521 | Assign a symbol number to each symbol. |
| 1522 | Count the number of string-table chars we will emit. |
| 1523 | Put this info into the headers as appropriate. */ |
| 1524 | know (zero_address_frag.fr_address == 0); |
| 1525 | string_byte_count = sizeof (string_byte_count); |
| 1526 | |
| 1527 | obj_crawl_symbol_chain (&headers); |
| 1528 | |
| 1529 | if (string_byte_count == sizeof (string_byte_count)) |
| 1530 | string_byte_count = 0; |
| 1531 | |
| 1532 | H_SET_STRING_SIZE (&headers, string_byte_count); |
| 1533 | |
| 1534 | /* Addresses of frags now reflect addresses we use in the object file. |
| 1535 | Symbol values are correct. |
| 1536 | Scan the frags, converting any ".org"s and ".align"s to ".fill"s. |
| 1537 | Also converting any machine-dependent frags using md_convert_frag(); */ |
| 1538 | subseg_change (SEG_TEXT, 0); |
| 1539 | |
| 1540 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
| 1541 | { |
| 1542 | /* At this point we have linked all the frags into a single |
| 1543 | chain. However, cvt_frag_to_fill may call md_convert_frag |
| 1544 | which may call fix_new. We need to ensure that fix_new adds |
| 1545 | the fixup to the right section. */ |
| 1546 | if (fragP == data_frag_root) |
| 1547 | subseg_change (SEG_DATA, 0); |
| 1548 | |
| 1549 | cvt_frag_to_fill (&headers, SEG_TEXT, fragP); |
| 1550 | |
| 1551 | /* Some assert macros don't work with # directives mixed in. */ |
| 1552 | #ifndef NDEBUG |
| 1553 | if (!(fragP->fr_next == NULL |
| 1554 | #ifdef OBJ_BOUT |
| 1555 | || fragP->fr_next == data_frag_root |
| 1556 | #endif |
| 1557 | || ((fragP->fr_next->fr_address - fragP->fr_address) |
| 1558 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
| 1559 | abort (); |
| 1560 | #endif |
| 1561 | } |
| 1562 | #endif /* ! BFD_ASSEMBLER */ |
| 1563 | |
| 1564 | #ifndef WORKING_DOT_WORD |
| 1565 | { |
| 1566 | struct broken_word *lie; |
| 1567 | struct broken_word **prevP; |
| 1568 | |
| 1569 | prevP = &broken_words; |
| 1570 | for (lie = broken_words; lie; lie = lie->next_broken_word) |
| 1571 | if (!lie->added) |
| 1572 | { |
| 1573 | expressionS exp; |
| 1574 | |
| 1575 | subseg_change (lie->seg, lie->subseg); |
| 1576 | exp.X_op = O_subtract; |
| 1577 | exp.X_add_symbol = lie->add; |
| 1578 | exp.X_op_symbol = lie->sub; |
| 1579 | exp.X_add_number = lie->addnum; |
| 1580 | #ifdef BFD_ASSEMBLER |
| 1581 | #ifdef TC_CONS_FIX_NEW |
| 1582 | TC_CONS_FIX_NEW (lie->frag, |
| 1583 | lie->word_goes_here - lie->frag->fr_literal, |
| 1584 | 2, &exp); |
| 1585 | #else |
| 1586 | fix_new_exp (lie->frag, |
| 1587 | lie->word_goes_here - lie->frag->fr_literal, |
| 1588 | 2, &exp, 0, BFD_RELOC_16); |
| 1589 | #endif |
| 1590 | #else |
| 1591 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) |
| 1592 | fix_new_exp (lie->frag, |
| 1593 | lie->word_goes_here - lie->frag->fr_literal, |
| 1594 | 2, &exp, 0, NO_RELOC); |
| 1595 | #else |
| 1596 | #ifdef TC_NS32K |
| 1597 | fix_new_ns32k_exp (lie->frag, |
| 1598 | lie->word_goes_here - lie->frag->fr_literal, |
| 1599 | 2, &exp, 0, 0, 2, 0, 0); |
| 1600 | #else |
| 1601 | fix_new_exp (lie->frag, |
| 1602 | lie->word_goes_here - lie->frag->fr_literal, |
| 1603 | 2, &exp, 0, 0); |
| 1604 | #endif /* TC_NS32K */ |
| 1605 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ |
| 1606 | #endif /* BFD_ASSEMBLER */ |
| 1607 | *prevP = lie->next_broken_word; |
| 1608 | } |
| 1609 | else |
| 1610 | prevP = &(lie->next_broken_word); |
| 1611 | |
| 1612 | for (lie = broken_words; lie;) |
| 1613 | { |
| 1614 | struct broken_word *untruth; |
| 1615 | char *table_ptr; |
| 1616 | addressT table_addr; |
| 1617 | addressT from_addr, to_addr; |
| 1618 | int n, m; |
| 1619 | |
| 1620 | subseg_change (lie->seg, lie->subseg); |
| 1621 | fragP = lie->dispfrag; |
| 1622 | |
| 1623 | /* Find out how many broken_words go here. */ |
| 1624 | n = 0; |
| 1625 | for (untruth = lie; |
| 1626 | untruth && untruth->dispfrag == fragP; |
| 1627 | untruth = untruth->next_broken_word) |
| 1628 | if (untruth->added == 1) |
| 1629 | n++; |
| 1630 | |
| 1631 | table_ptr = lie->dispfrag->fr_opcode; |
| 1632 | table_addr = (lie->dispfrag->fr_address |
| 1633 | + (table_ptr - lie->dispfrag->fr_literal)); |
| 1634 | /* Create the jump around the long jumps. This is a short |
| 1635 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ |
| 1636 | from_addr = table_addr; |
| 1637 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; |
| 1638 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
| 1639 | lie->add); |
| 1640 | table_ptr += md_short_jump_size; |
| 1641 | table_addr += md_short_jump_size; |
| 1642 | |
| 1643 | for (m = 0; |
| 1644 | lie && lie->dispfrag == fragP; |
| 1645 | m++, lie = lie->next_broken_word) |
| 1646 | { |
| 1647 | if (lie->added == 2) |
| 1648 | continue; |
| 1649 | /* Patch the jump table. */ |
| 1650 | /* This is the offset from ??? to table_ptr+0. */ |
| 1651 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
| 1652 | #ifdef BFD_ASSEMBLER |
| 1653 | to_addr -= symbol_get_frag (lie->sub)->fr_address; |
| 1654 | #endif |
| 1655 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD |
| 1656 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie); |
| 1657 | #endif |
| 1658 | md_number_to_chars (lie->word_goes_here, to_addr, 2); |
| 1659 | for (untruth = lie->next_broken_word; |
| 1660 | untruth && untruth->dispfrag == fragP; |
| 1661 | untruth = untruth->next_broken_word) |
| 1662 | { |
| 1663 | if (untruth->use_jump == lie) |
| 1664 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); |
| 1665 | } |
| 1666 | |
| 1667 | /* Install the long jump. */ |
| 1668 | /* This is a long jump from table_ptr+0 to the final target. */ |
| 1669 | from_addr = table_addr; |
| 1670 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; |
| 1671 | #ifdef BFD_ASSEMBLER |
| 1672 | to_addr += symbol_get_frag (lie->add)->fr_address; |
| 1673 | #endif |
| 1674 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
| 1675 | lie->add); |
| 1676 | table_ptr += md_long_jump_size; |
| 1677 | table_addr += md_long_jump_size; |
| 1678 | } |
| 1679 | } |
| 1680 | } |
| 1681 | #endif /* not WORKING_DOT_WORD */ |
| 1682 | |
| 1683 | #ifndef BFD_ASSEMBLER |
| 1684 | #ifndef OBJ_VMS |
| 1685 | { /* not vms */ |
| 1686 | char *the_object_file; |
| 1687 | long object_file_size; |
| 1688 | /* Scan every FixS performing fixups. We had to wait until now to |
| 1689 | do this because md_convert_frag() may have made some fixSs. */ |
| 1690 | int trsize, drsize; |
| 1691 | |
| 1692 | subseg_change (SEG_TEXT, 0); |
| 1693 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); |
| 1694 | subseg_change (SEG_DATA, 0); |
| 1695 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); |
| 1696 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); |
| 1697 | |
| 1698 | /* FIXME: Move this stuff into the pre-write-hook. */ |
| 1699 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); |
| 1700 | H_SET_ENTRY_POINT (&headers, 0); |
| 1701 | |
| 1702 | obj_pre_write_hook (&headers); /* Extra coff stuff. */ |
| 1703 | |
| 1704 | object_file_size = H_GET_FILE_SIZE (&headers); |
| 1705 | next_object_file_charP = the_object_file = xmalloc (object_file_size); |
| 1706 | |
| 1707 | output_file_create (out_file_name); |
| 1708 | |
| 1709 | obj_header_append (&next_object_file_charP, &headers); |
| 1710 | |
| 1711 | know ((next_object_file_charP - the_object_file) |
| 1712 | == H_GET_HEADER_SIZE (&headers)); |
| 1713 | |
| 1714 | /* Emit code. */ |
| 1715 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
| 1716 | { |
| 1717 | register long count; |
| 1718 | register char *fill_literal; |
| 1719 | register long fill_size; |
| 1720 | |
| 1721 | PROGRESS (1); |
| 1722 | know (fragP->fr_type == rs_fill); |
| 1723 | append (&next_object_file_charP, fragP->fr_literal, |
| 1724 | (unsigned long) fragP->fr_fix); |
| 1725 | fill_literal = fragP->fr_literal + fragP->fr_fix; |
| 1726 | fill_size = fragP->fr_var; |
| 1727 | know (fragP->fr_offset >= 0); |
| 1728 | |
| 1729 | for (count = fragP->fr_offset; count; count--) |
| 1730 | append (&next_object_file_charP, fill_literal, |
| 1731 | (unsigned long) fill_size); |
| 1732 | } |
| 1733 | |
| 1734 | know ((next_object_file_charP - the_object_file) |
| 1735 | == (H_GET_HEADER_SIZE (&headers) |
| 1736 | + H_GET_TEXT_SIZE (&headers) |
| 1737 | + H_GET_DATA_SIZE (&headers))); |
| 1738 | |
| 1739 | /* Emit relocations. */ |
| 1740 | obj_emit_relocations (&next_object_file_charP, text_fix_root, |
| 1741 | (relax_addressT) 0); |
| 1742 | know ((next_object_file_charP - the_object_file) |
| 1743 | == (H_GET_HEADER_SIZE (&headers) |
| 1744 | + H_GET_TEXT_SIZE (&headers) |
| 1745 | + H_GET_DATA_SIZE (&headers) |
| 1746 | + H_GET_TEXT_RELOCATION_SIZE (&headers))); |
| 1747 | #ifdef TC_I960 |
| 1748 | /* Make addresses in data relocation directives relative to beginning of |
| 1749 | first data fragment, not end of last text fragment: alignment of the |
| 1750 | start of the data segment may place a gap between the segments. */ |
| 1751 | obj_emit_relocations (&next_object_file_charP, data_fix_root, |
| 1752 | data0_frchainP->frch_root->fr_address); |
| 1753 | #else /* TC_I960 */ |
| 1754 | obj_emit_relocations (&next_object_file_charP, data_fix_root, |
| 1755 | text_last_frag->fr_address); |
| 1756 | #endif /* TC_I960 */ |
| 1757 | |
| 1758 | know ((next_object_file_charP - the_object_file) |
| 1759 | == (H_GET_HEADER_SIZE (&headers) |
| 1760 | + H_GET_TEXT_SIZE (&headers) |
| 1761 | + H_GET_DATA_SIZE (&headers) |
| 1762 | + H_GET_TEXT_RELOCATION_SIZE (&headers) |
| 1763 | + H_GET_DATA_RELOCATION_SIZE (&headers))); |
| 1764 | |
| 1765 | /* Emit line number entries. */ |
| 1766 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
| 1767 | know ((next_object_file_charP - the_object_file) |
| 1768 | == (H_GET_HEADER_SIZE (&headers) |
| 1769 | + H_GET_TEXT_SIZE (&headers) |
| 1770 | + H_GET_DATA_SIZE (&headers) |
| 1771 | + H_GET_TEXT_RELOCATION_SIZE (&headers) |
| 1772 | + H_GET_DATA_RELOCATION_SIZE (&headers) |
| 1773 | + H_GET_LINENO_SIZE (&headers))); |
| 1774 | |
| 1775 | /* Emit symbols. */ |
| 1776 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
| 1777 | know ((next_object_file_charP - the_object_file) |
| 1778 | == (H_GET_HEADER_SIZE (&headers) |
| 1779 | + H_GET_TEXT_SIZE (&headers) |
| 1780 | + H_GET_DATA_SIZE (&headers) |
| 1781 | + H_GET_TEXT_RELOCATION_SIZE (&headers) |
| 1782 | + H_GET_DATA_RELOCATION_SIZE (&headers) |
| 1783 | + H_GET_LINENO_SIZE (&headers) |
| 1784 | + H_GET_SYMBOL_TABLE_SIZE (&headers))); |
| 1785 | |
| 1786 | /* Emit strings. */ |
| 1787 | if (string_byte_count > 0) |
| 1788 | obj_emit_strings (&next_object_file_charP); |
| 1789 | |
| 1790 | #ifdef BFD_HEADERS |
| 1791 | bfd_seek (stdoutput, 0, 0); |
| 1792 | bfd_write (the_object_file, 1, object_file_size, stdoutput); |
| 1793 | #else |
| 1794 | |
| 1795 | /* Write the data to the file. */ |
| 1796 | output_file_append (the_object_file, object_file_size, out_file_name); |
| 1797 | free (the_object_file); |
| 1798 | #endif |
| 1799 | } |
| 1800 | #else /* OBJ_VMS */ |
| 1801 | /* Now do the VMS-dependent part of writing the object file. */ |
| 1802 | vms_write_object_file (H_GET_TEXT_SIZE (&headers), |
| 1803 | H_GET_DATA_SIZE (&headers), |
| 1804 | H_GET_BSS_SIZE (&headers), |
| 1805 | text_frag_root, data_frag_root); |
| 1806 | #endif /* OBJ_VMS */ |
| 1807 | #else /* BFD_ASSEMBLER */ |
| 1808 | |
| 1809 | /* Resolve symbol values. This needs to be done before processing |
| 1810 | the relocations. */ |
| 1811 | if (symbol_rootP) |
| 1812 | { |
| 1813 | symbolS *symp; |
| 1814 | |
| 1815 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) |
| 1816 | resolve_symbol_value (symp, 1); |
| 1817 | } |
| 1818 | resolve_local_symbol_values (); |
| 1819 | |
| 1820 | PROGRESS (1); |
| 1821 | |
| 1822 | #ifdef tc_frob_file_before_adjust |
| 1823 | tc_frob_file_before_adjust (); |
| 1824 | #endif |
| 1825 | #ifdef obj_frob_file_before_adjust |
| 1826 | obj_frob_file_before_adjust (); |
| 1827 | #endif |
| 1828 | |
| 1829 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
| 1830 | |
| 1831 | /* Set up symbol table, and write it out. */ |
| 1832 | if (symbol_rootP) |
| 1833 | { |
| 1834 | symbolS *symp; |
| 1835 | |
| 1836 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) |
| 1837 | { |
| 1838 | int punt = 0; |
| 1839 | const char *name; |
| 1840 | |
| 1841 | if (symbol_mri_common_p (symp)) |
| 1842 | { |
| 1843 | if (S_IS_EXTERNAL (symp)) |
| 1844 | as_bad (_("%s: global symbols not supported in common sections"), |
| 1845 | S_GET_NAME (symp)); |
| 1846 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
| 1847 | continue; |
| 1848 | } |
| 1849 | |
| 1850 | name = S_GET_NAME (symp); |
| 1851 | if (name) |
| 1852 | { |
| 1853 | const char *name2 = |
| 1854 | decode_local_label_name ((char *) S_GET_NAME (symp)); |
| 1855 | /* They only differ if `name' is a fb or dollar local |
| 1856 | label name. */ |
| 1857 | if (name2 != name && ! S_IS_DEFINED (symp)) |
| 1858 | as_bad (_("local label %s is not defined"), name2); |
| 1859 | } |
| 1860 | |
| 1861 | /* Do it again, because adjust_reloc_syms might introduce |
| 1862 | more symbols. They'll probably only be section symbols, |
| 1863 | but they'll still need to have the values computed. */ |
| 1864 | resolve_symbol_value (symp, 1); |
| 1865 | |
| 1866 | /* Skip symbols which were equated to undefined or common |
| 1867 | symbols. */ |
| 1868 | if (symbol_equated_p (symp) |
| 1869 | && (! S_IS_DEFINED (symp) || S_IS_COMMON (symp))) |
| 1870 | { |
| 1871 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
| 1872 | continue; |
| 1873 | } |
| 1874 | |
| 1875 | /* So far, common symbols have been treated like undefined symbols. |
| 1876 | Put them in the common section now. */ |
| 1877 | if (S_IS_DEFINED (symp) == 0 |
| 1878 | && S_GET_VALUE (symp) != 0) |
| 1879 | S_SET_SEGMENT (symp, bfd_com_section_ptr); |
| 1880 | #if 0 |
| 1881 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", |
| 1882 | S_GET_NAME (symp), symp, |
| 1883 | S_GET_VALUE (symp), |
| 1884 | symbol_get_bfdsym (symp)->flags, |
| 1885 | segment_name (S_GET_SEGMENT (symp))); |
| 1886 | #endif |
| 1887 | |
| 1888 | #ifdef obj_frob_symbol |
| 1889 | obj_frob_symbol (symp, punt); |
| 1890 | #endif |
| 1891 | #ifdef tc_frob_symbol |
| 1892 | if (! punt || symbol_used_in_reloc_p (symp)) |
| 1893 | tc_frob_symbol (symp, punt); |
| 1894 | #endif |
| 1895 | |
| 1896 | /* If we don't want to keep this symbol, splice it out of |
| 1897 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never |
| 1898 | want section symbols. Otherwise, we skip local symbols |
| 1899 | and symbols that the frob_symbol macros told us to punt, |
| 1900 | but we keep such symbols if they are used in relocs. */ |
| 1901 | if ((! EMIT_SECTION_SYMBOLS |
| 1902 | && symbol_section_p (symp)) |
| 1903 | /* Note that S_IS_EXTERN and S_IS_LOCAL are not always |
| 1904 | opposites. Sometimes the former checks flags and the |
| 1905 | latter examines the name... */ |
| 1906 | || (!S_IS_EXTERN (symp) |
| 1907 | && (S_IS_LOCAL (symp) || punt) |
| 1908 | && ! symbol_used_in_reloc_p (symp))) |
| 1909 | { |
| 1910 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
| 1911 | |
| 1912 | /* After symbol_remove, symbol_next(symp) still returns |
| 1913 | the one that came after it in the chain. So we don't |
| 1914 | need to do any extra cleanup work here. */ |
| 1915 | continue; |
| 1916 | } |
| 1917 | |
| 1918 | /* Make sure we really got a value for the symbol. */ |
| 1919 | if (! symbol_resolved_p (symp)) |
| 1920 | { |
| 1921 | as_bad (_("can't resolve value for symbol \"%s\""), |
| 1922 | S_GET_NAME (symp)); |
| 1923 | symbol_mark_resolved (symp); |
| 1924 | } |
| 1925 | |
| 1926 | /* Set the value into the BFD symbol. Up til now the value |
| 1927 | has only been kept in the gas symbolS struct. */ |
| 1928 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
| 1929 | } |
| 1930 | } |
| 1931 | |
| 1932 | PROGRESS (1); |
| 1933 | |
| 1934 | /* Now do any format-specific adjustments to the symbol table, such |
| 1935 | as adding file symbols. */ |
| 1936 | #ifdef tc_adjust_symtab |
| 1937 | tc_adjust_symtab (); |
| 1938 | #endif |
| 1939 | #ifdef obj_adjust_symtab |
| 1940 | obj_adjust_symtab (); |
| 1941 | #endif |
| 1942 | |
| 1943 | /* Now that all the sizes are known, and contents correct, we can |
| 1944 | start writing to the file. */ |
| 1945 | set_symtab (); |
| 1946 | |
| 1947 | /* If *_frob_file changes the symbol value at this point, it is |
| 1948 | responsible for moving the changed value into symp->bsym->value |
| 1949 | as well. Hopefully all symbol value changing can be done in |
| 1950 | *_frob_symbol. */ |
| 1951 | #ifdef tc_frob_file |
| 1952 | tc_frob_file (); |
| 1953 | #endif |
| 1954 | #ifdef obj_frob_file |
| 1955 | obj_frob_file (); |
| 1956 | #endif |
| 1957 | |
| 1958 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
| 1959 | |
| 1960 | #ifdef tc_frob_file_after_relocs |
| 1961 | tc_frob_file_after_relocs (); |
| 1962 | #endif |
| 1963 | #ifdef obj_frob_file_after_relocs |
| 1964 | obj_frob_file_after_relocs (); |
| 1965 | #endif |
| 1966 | |
| 1967 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
| 1968 | #endif /* BFD_ASSEMBLER */ |
| 1969 | } |
| 1970 | #endif /* ! BFD */ |
| 1971 | |
| 1972 | #ifdef TC_GENERIC_RELAX_TABLE |
| 1973 | |
| 1974 | static int is_dnrange PARAMS ((fragS *, fragS *)); |
| 1975 | |
| 1976 | /* Subroutines of relax_segment. */ |
| 1977 | static int |
| 1978 | is_dnrange (f1, f2) |
| 1979 | fragS *f1; |
| 1980 | fragS *f2; |
| 1981 | { |
| 1982 | for (; f1; f1 = f1->fr_next) |
| 1983 | if (f1->fr_next == f2) |
| 1984 | return 1; |
| 1985 | return 0; |
| 1986 | } |
| 1987 | |
| 1988 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
| 1989 | |
| 1990 | long |
| 1991 | relax_frag (fragP, stretch) |
| 1992 | fragS *fragP; |
| 1993 | long stretch; |
| 1994 | { |
| 1995 | const relax_typeS *this_type; |
| 1996 | const relax_typeS *start_type; |
| 1997 | relax_substateT next_state; |
| 1998 | relax_substateT this_state; |
| 1999 | long aim, target, growth; |
| 2000 | symbolS *symbolP = fragP->fr_symbol; |
| 2001 | long offset = fragP->fr_offset; |
| 2002 | /* Recompute was_address by undoing "+= stretch" done by relax_segment. */ |
| 2003 | unsigned long was_address = fragP->fr_address - stretch; |
| 2004 | unsigned long address = fragP->fr_address; |
| 2005 | const relax_typeS *table = TC_GENERIC_RELAX_TABLE; |
| 2006 | |
| 2007 | this_state = fragP->fr_subtype; |
| 2008 | start_type = this_type = table + this_state; |
| 2009 | target = offset; |
| 2010 | |
| 2011 | if (symbolP) |
| 2012 | { |
| 2013 | #ifndef DIFF_EXPR_OK |
| 2014 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
| 2015 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
| 2016 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) |
| 2017 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) |
| 2018 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); |
| 2019 | #endif |
| 2020 | know (symbolP->sy_frag); |
| 2021 | #endif |
| 2022 | know (!(S_GET_SEGMENT (symbolP) == absolute_section) |
| 2023 | || symbolP->sy_frag == &zero_address_frag); |
| 2024 | target += S_GET_VALUE (symbolP) + symbol_get_frag (symbolP)->fr_address; |
| 2025 | |
| 2026 | /* If frag has yet to be reached on this pass, |
| 2027 | assume it will move by STRETCH just as we did. |
| 2028 | If this is not so, it will be because some frag |
| 2029 | between grows, and that will force another pass. |
| 2030 | |
| 2031 | Beware zero-length frags. |
| 2032 | |
| 2033 | There should be a faster way to do this. */ |
| 2034 | |
| 2035 | if (symbol_get_frag (symbolP)->fr_address >= was_address |
| 2036 | && is_dnrange (fragP, symbol_get_frag (symbolP))) |
| 2037 | { |
| 2038 | target += stretch; |
| 2039 | } |
| 2040 | } |
| 2041 | |
| 2042 | aim = target - address - fragP->fr_fix; |
| 2043 | #ifdef TC_PCREL_ADJUST |
| 2044 | /* Currently only the ns32k family needs this. */ |
| 2045 | aim += TC_PCREL_ADJUST (fragP); |
| 2046 | /* #else */ |
| 2047 | /* This machine doesn't want to use pcrel_adjust. |
| 2048 | In that case, pcrel_adjust should be zero. */ |
| 2049 | #if 0 |
| 2050 | assert (fragP->fr_targ.ns32k.pcrel_adjust == 0); |
| 2051 | #endif |
| 2052 | #endif |
| 2053 | #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */ |
| 2054 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
| 2055 | #endif |
| 2056 | |
| 2057 | if (aim < 0) |
| 2058 | { |
| 2059 | /* Look backwards. */ |
| 2060 | for (next_state = this_type->rlx_more; next_state;) |
| 2061 | if (aim >= this_type->rlx_backward) |
| 2062 | next_state = 0; |
| 2063 | else |
| 2064 | { |
| 2065 | /* Grow to next state. */ |
| 2066 | this_state = next_state; |
| 2067 | this_type = table + this_state; |
| 2068 | next_state = this_type->rlx_more; |
| 2069 | } |
| 2070 | } |
| 2071 | else |
| 2072 | { |
| 2073 | /* Look forwards. */ |
| 2074 | for (next_state = this_type->rlx_more; next_state;) |
| 2075 | if (aim <= this_type->rlx_forward) |
| 2076 | next_state = 0; |
| 2077 | else |
| 2078 | { |
| 2079 | /* Grow to next state. */ |
| 2080 | this_state = next_state; |
| 2081 | this_type = table + this_state; |
| 2082 | next_state = this_type->rlx_more; |
| 2083 | } |
| 2084 | } |
| 2085 | |
| 2086 | growth = this_type->rlx_length - start_type->rlx_length; |
| 2087 | if (growth != 0) |
| 2088 | fragP->fr_subtype = this_state; |
| 2089 | return growth; |
| 2090 | } |
| 2091 | |
| 2092 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
| 2093 | |
| 2094 | /* Relax_align. Advance location counter to next address that has 'alignment' |
| 2095 | lowest order bits all 0s, return size of adjustment made. */ |
| 2096 | static relax_addressT |
| 2097 | relax_align (address, alignment) |
| 2098 | register relax_addressT address; /* Address now. */ |
| 2099 | register int alignment; /* Alignment (binary). */ |
| 2100 | { |
| 2101 | relax_addressT mask; |
| 2102 | relax_addressT new_address; |
| 2103 | |
| 2104 | mask = ~((~0) << alignment); |
| 2105 | new_address = (address + mask) & (~mask); |
| 2106 | #ifdef LINKER_RELAXING_SHRINKS_ONLY |
| 2107 | if (linkrelax) |
| 2108 | /* We must provide lots of padding, so the linker can discard it |
| 2109 | when needed. The linker will not add extra space, ever. */ |
| 2110 | new_address += (1 << alignment); |
| 2111 | #endif |
| 2112 | return (new_address - address); |
| 2113 | } |
| 2114 | |
| 2115 | /* Now we have a segment, not a crowd of sub-segments, we can make |
| 2116 | fr_address values. |
| 2117 | |
| 2118 | Relax the frags. |
| 2119 | |
| 2120 | After this, all frags in this segment have addresses that are correct |
| 2121 | within the segment. Since segments live in different file addresses, |
| 2122 | these frag addresses may not be the same as final object-file |
| 2123 | addresses. */ |
| 2124 | |
| 2125 | void |
| 2126 | relax_segment (segment_frag_root, segment) |
| 2127 | struct frag *segment_frag_root; |
| 2128 | segT segment; |
| 2129 | { |
| 2130 | register struct frag *fragP; |
| 2131 | register relax_addressT address; |
| 2132 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
| 2133 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); |
| 2134 | #endif |
| 2135 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
| 2136 | subseg_change (segment, 0); |
| 2137 | |
| 2138 | /* For each frag in segment: count and store (a 1st guess of) |
| 2139 | fr_address. */ |
| 2140 | address = 0; |
| 2141 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
| 2142 | { |
| 2143 | fragP->fr_address = address; |
| 2144 | address += fragP->fr_fix; |
| 2145 | |
| 2146 | switch (fragP->fr_type) |
| 2147 | { |
| 2148 | case rs_fill: |
| 2149 | address += fragP->fr_offset * fragP->fr_var; |
| 2150 | break; |
| 2151 | |
| 2152 | case rs_align: |
| 2153 | case rs_align_code: |
| 2154 | { |
| 2155 | addressT offset = relax_align (address, (int) fragP->fr_offset); |
| 2156 | |
| 2157 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) |
| 2158 | offset = 0; |
| 2159 | |
| 2160 | if (offset % fragP->fr_var != 0) |
| 2161 | { |
| 2162 | as_bad (_("alignment padding (%lu bytes) not a multiple of %ld"), |
| 2163 | (unsigned long) offset, (long) fragP->fr_var); |
| 2164 | offset -= (offset % fragP->fr_var); |
| 2165 | } |
| 2166 | |
| 2167 | address += offset; |
| 2168 | } |
| 2169 | break; |
| 2170 | |
| 2171 | case rs_org: |
| 2172 | case rs_space: |
| 2173 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
| 2174 | break; |
| 2175 | |
| 2176 | case rs_machine_dependent: |
| 2177 | address += md_estimate_size_before_relax (fragP, segment); |
| 2178 | break; |
| 2179 | |
| 2180 | #ifndef WORKING_DOT_WORD |
| 2181 | /* Broken words don't concern us yet. */ |
| 2182 | case rs_broken_word: |
| 2183 | break; |
| 2184 | #endif |
| 2185 | |
| 2186 | case rs_leb128: |
| 2187 | /* Initial guess is always 1; doing otherwise can result in |
| 2188 | stable solutions that are larger than the minimum. */ |
| 2189 | address += fragP->fr_offset = 1; |
| 2190 | break; |
| 2191 | |
| 2192 | case rs_cfa: |
| 2193 | address += eh_frame_estimate_size_before_relax (fragP); |
| 2194 | break; |
| 2195 | |
| 2196 | default: |
| 2197 | BAD_CASE (fragP->fr_type); |
| 2198 | break; |
| 2199 | } |
| 2200 | } |
| 2201 | |
| 2202 | /* Do relax(). */ |
| 2203 | { |
| 2204 | long stretch; /* May be any size, 0 or negative. */ |
| 2205 | /* Cumulative number of addresses we have relaxed this pass. |
| 2206 | We may have relaxed more than one address. */ |
| 2207 | long stretched; /* Have we stretched on this pass? */ |
| 2208 | /* This is 'cuz stretch may be zero, when, in fact some piece of code |
| 2209 | grew, and another shrank. If a branch instruction doesn't fit anymore, |
| 2210 | we could be scrod. */ |
| 2211 | |
| 2212 | do |
| 2213 | { |
| 2214 | stretch = stretched = 0; |
| 2215 | |
| 2216 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
| 2217 | { |
| 2218 | long growth = 0; |
| 2219 | addressT was_address; |
| 2220 | offsetT offset; |
| 2221 | symbolS *symbolP; |
| 2222 | |
| 2223 | was_address = fragP->fr_address; |
| 2224 | address = fragP->fr_address += stretch; |
| 2225 | symbolP = fragP->fr_symbol; |
| 2226 | offset = fragP->fr_offset; |
| 2227 | |
| 2228 | switch (fragP->fr_type) |
| 2229 | { |
| 2230 | case rs_fill: /* .fill never relaxes. */ |
| 2231 | growth = 0; |
| 2232 | break; |
| 2233 | |
| 2234 | #ifndef WORKING_DOT_WORD |
| 2235 | /* JF: This is RMS's idea. I do *NOT* want to be blamed |
| 2236 | for it I do not want to write it. I do not want to have |
| 2237 | anything to do with it. This is not the proper way to |
| 2238 | implement this misfeature. */ |
| 2239 | case rs_broken_word: |
| 2240 | { |
| 2241 | struct broken_word *lie; |
| 2242 | struct broken_word *untruth; |
| 2243 | |
| 2244 | /* Yes this is ugly (storing the broken_word pointer |
| 2245 | in the symbol slot). Still, this whole chunk of |
| 2246 | code is ugly, and I don't feel like doing anything |
| 2247 | about it. Think of it as stubbornness in action. */ |
| 2248 | growth = 0; |
| 2249 | for (lie = (struct broken_word *) (fragP->fr_symbol); |
| 2250 | lie && lie->dispfrag == fragP; |
| 2251 | lie = lie->next_broken_word) |
| 2252 | { |
| 2253 | |
| 2254 | if (lie->added) |
| 2255 | continue; |
| 2256 | |
| 2257 | offset = (symbol_get_frag (lie->add)->fr_address |
| 2258 | + S_GET_VALUE (lie->add) |
| 2259 | + lie->addnum |
| 2260 | - (symbol_get_frag (lie->sub)->fr_address |
| 2261 | + S_GET_VALUE (lie->sub))); |
| 2262 | if (offset <= -32768 || offset >= 32767) |
| 2263 | { |
| 2264 | if (flag_warn_displacement) |
| 2265 | { |
| 2266 | char buf[50]; |
| 2267 | sprint_value (buf, (addressT) lie->addnum); |
| 2268 | as_warn (_(".word %s-%s+%s didn't fit"), |
| 2269 | S_GET_NAME (lie->add), |
| 2270 | S_GET_NAME (lie->sub), |
| 2271 | buf); |
| 2272 | } |
| 2273 | lie->added = 1; |
| 2274 | if (fragP->fr_subtype == 0) |
| 2275 | { |
| 2276 | fragP->fr_subtype++; |
| 2277 | growth += md_short_jump_size; |
| 2278 | } |
| 2279 | for (untruth = lie->next_broken_word; |
| 2280 | untruth && untruth->dispfrag == lie->dispfrag; |
| 2281 | untruth = untruth->next_broken_word) |
| 2282 | if ((symbol_get_frag (untruth->add) |
| 2283 | == symbol_get_frag (lie->add)) |
| 2284 | && (S_GET_VALUE (untruth->add) |
| 2285 | == S_GET_VALUE (lie->add))) |
| 2286 | { |
| 2287 | untruth->added = 2; |
| 2288 | untruth->use_jump = lie; |
| 2289 | } |
| 2290 | growth += md_long_jump_size; |
| 2291 | } |
| 2292 | } |
| 2293 | |
| 2294 | break; |
| 2295 | } /* case rs_broken_word */ |
| 2296 | #endif |
| 2297 | case rs_align: |
| 2298 | case rs_align_code: |
| 2299 | { |
| 2300 | addressT oldoff, newoff; |
| 2301 | |
| 2302 | oldoff = relax_align (was_address + fragP->fr_fix, |
| 2303 | (int) offset); |
| 2304 | newoff = relax_align (address + fragP->fr_fix, |
| 2305 | (int) offset); |
| 2306 | |
| 2307 | if (fragP->fr_subtype != 0) |
| 2308 | { |
| 2309 | if (oldoff > fragP->fr_subtype) |
| 2310 | oldoff = 0; |
| 2311 | if (newoff > fragP->fr_subtype) |
| 2312 | newoff = 0; |
| 2313 | } |
| 2314 | |
| 2315 | growth = newoff - oldoff; |
| 2316 | } |
| 2317 | break; |
| 2318 | |
| 2319 | case rs_org: |
| 2320 | { |
| 2321 | long target = offset; |
| 2322 | long after; |
| 2323 | |
| 2324 | if (symbolP) |
| 2325 | { |
| 2326 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
| 2327 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
| 2328 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) |
| 2329 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) |
| 2330 | || S_GET_SEGMENT (symbolP) == SEG_BSS); |
| 2331 | know (symbolP->sy_frag); |
| 2332 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
| 2333 | || (symbolP->sy_frag == &zero_address_frag)); |
| 2334 | #endif |
| 2335 | target += (S_GET_VALUE (symbolP) |
| 2336 | + symbol_get_frag (symbolP)->fr_address); |
| 2337 | } /* if we have a symbol */ |
| 2338 | |
| 2339 | know (fragP->fr_next); |
| 2340 | after = fragP->fr_next->fr_address; |
| 2341 | growth = target - after; |
| 2342 | if (growth < 0) |
| 2343 | { |
| 2344 | /* Growth may be negative, but variable part of frag |
| 2345 | cannot have fewer than 0 chars. That is, we can't |
| 2346 | .org backwards. */ |
| 2347 | as_bad_where (fragP->fr_file, fragP->fr_line, |
| 2348 | _("attempt to .org backwards ignored")); |
| 2349 | |
| 2350 | /* We've issued an error message. Change the |
| 2351 | frag to avoid cascading errors. */ |
| 2352 | fragP->fr_type = rs_align; |
| 2353 | fragP->fr_subtype = 0; |
| 2354 | fragP->fr_offset = 0; |
| 2355 | fragP->fr_fix = after - address; |
| 2356 | growth = stretch; |
| 2357 | } |
| 2358 | |
| 2359 | /* This is an absolute growth factor */ |
| 2360 | growth -= stretch; |
| 2361 | break; |
| 2362 | } |
| 2363 | |
| 2364 | case rs_space: |
| 2365 | if (symbolP) |
| 2366 | { |
| 2367 | growth = S_GET_VALUE (symbolP); |
| 2368 | if (symbol_get_frag (symbolP) != &zero_address_frag |
| 2369 | || S_IS_COMMON (symbolP) |
| 2370 | || ! S_IS_DEFINED (symbolP)) |
| 2371 | as_bad_where (fragP->fr_file, fragP->fr_line, |
| 2372 | _(".space specifies non-absolute value")); |
| 2373 | fragP->fr_symbol = 0; |
| 2374 | if (growth < 0) |
| 2375 | { |
| 2376 | as_warn (_(".space or .fill with negative value, ignored")); |
| 2377 | growth = 0; |
| 2378 | } |
| 2379 | } |
| 2380 | else |
| 2381 | growth = 0; |
| 2382 | break; |
| 2383 | |
| 2384 | case rs_machine_dependent: |
| 2385 | #ifdef md_relax_frag |
| 2386 | growth = md_relax_frag (fragP, stretch); |
| 2387 | #else |
| 2388 | #ifdef TC_GENERIC_RELAX_TABLE |
| 2389 | /* The default way to relax a frag is to look through |
| 2390 | TC_GENERIC_RELAX_TABLE. */ |
| 2391 | growth = relax_frag (fragP, stretch); |
| 2392 | #endif /* TC_GENERIC_RELAX_TABLE */ |
| 2393 | #endif |
| 2394 | break; |
| 2395 | |
| 2396 | case rs_leb128: |
| 2397 | { |
| 2398 | valueT value; |
| 2399 | int size; |
| 2400 | |
| 2401 | value = resolve_symbol_value (fragP->fr_symbol, 0); |
| 2402 | size = sizeof_leb128 (value, fragP->fr_subtype); |
| 2403 | growth = size - fragP->fr_offset; |
| 2404 | fragP->fr_offset = size; |
| 2405 | } |
| 2406 | break; |
| 2407 | |
| 2408 | case rs_cfa: |
| 2409 | growth = eh_frame_relax_frag (fragP); |
| 2410 | break; |
| 2411 | |
| 2412 | default: |
| 2413 | BAD_CASE (fragP->fr_type); |
| 2414 | break; |
| 2415 | } |
| 2416 | if (growth) |
| 2417 | { |
| 2418 | stretch += growth; |
| 2419 | stretched++; |
| 2420 | } |
| 2421 | } /* For each frag in the segment. */ |
| 2422 | } |
| 2423 | while (stretched); /* Until nothing further to relax. */ |
| 2424 | } /* do_relax */ |
| 2425 | |
| 2426 | /* We now have valid fr_address'es for each frag. */ |
| 2427 | |
| 2428 | /* All fr_address's are correct, relative to their own segment. |
| 2429 | We have made all the fixS we will ever make. */ |
| 2430 | } |
| 2431 | |
| 2432 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) |
| 2433 | |
| 2434 | #ifndef TC_RELOC_RTSYM_LOC_FIXUP |
| 2435 | #define TC_RELOC_RTSYM_LOC_FIXUP(X) (1) |
| 2436 | #endif |
| 2437 | |
| 2438 | /* fixup_segment() |
| 2439 | |
| 2440 | Go through all the fixS's in a segment and see which ones can be |
| 2441 | handled now. (These consist of fixS where we have since discovered |
| 2442 | the value of a symbol, or the address of the frag involved.) |
| 2443 | For each one, call md_apply_fix to put the fix into the frag data. |
| 2444 | |
| 2445 | Result is a count of how many relocation structs will be needed to |
| 2446 | handle the remaining fixS's that we couldn't completely handle here. |
| 2447 | These will be output later by emit_relocations(). */ |
| 2448 | |
| 2449 | static long |
| 2450 | fixup_segment (fixP, this_segment_type) |
| 2451 | register fixS *fixP; |
| 2452 | segT this_segment_type; /* N_TYPE bits for segment. */ |
| 2453 | { |
| 2454 | long seg_reloc_count = 0; |
| 2455 | symbolS *add_symbolP; |
| 2456 | symbolS *sub_symbolP; |
| 2457 | valueT add_number; |
| 2458 | int size; |
| 2459 | char *place; |
| 2460 | long where; |
| 2461 | int pcrel, plt; |
| 2462 | fragS *fragP; |
| 2463 | segT add_symbol_segment = absolute_section; |
| 2464 | |
| 2465 | /* If the linker is doing the relaxing, we must not do any fixups. |
| 2466 | |
| 2467 | Well, strictly speaking that's not true -- we could do any that are |
| 2468 | PC-relative and don't cross regions that could change size. And for the |
| 2469 | i960 (the only machine for which we've got a relaxing linker right now), |
| 2470 | we might be able to turn callx/callj into bal anyways in cases where we |
| 2471 | know the maximum displacement. */ |
| 2472 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment_type)) |
| 2473 | { |
| 2474 | for (; fixP; fixP = fixP->fx_next) |
| 2475 | seg_reloc_count++; |
| 2476 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
| 2477 | return seg_reloc_count; |
| 2478 | } |
| 2479 | |
| 2480 | for (; fixP; fixP = fixP->fx_next) |
| 2481 | { |
| 2482 | #ifdef DEBUG5 |
| 2483 | fprintf (stderr, "\nprocessing fixup:\n"); |
| 2484 | print_fixup (fixP); |
| 2485 | #endif |
| 2486 | |
| 2487 | fragP = fixP->fx_frag; |
| 2488 | know (fragP); |
| 2489 | where = fixP->fx_where; |
| 2490 | place = fragP->fr_literal + where; |
| 2491 | size = fixP->fx_size; |
| 2492 | add_symbolP = fixP->fx_addsy; |
| 2493 | #ifdef TC_VALIDATE_FIX |
| 2494 | TC_VALIDATE_FIX (fixP, this_segment_type, skip); |
| 2495 | #endif |
| 2496 | sub_symbolP = fixP->fx_subsy; |
| 2497 | add_number = fixP->fx_offset; |
| 2498 | pcrel = fixP->fx_pcrel; |
| 2499 | plt = fixP->fx_plt; |
| 2500 | |
| 2501 | if (add_symbolP != NULL |
| 2502 | && symbol_mri_common_p (add_symbolP)) |
| 2503 | { |
| 2504 | know (add_symbolP->sy_value.X_op == O_symbol); |
| 2505 | add_number += S_GET_VALUE (add_symbolP); |
| 2506 | fixP->fx_offset = add_number; |
| 2507 | add_symbolP = fixP->fx_addsy = |
| 2508 | symbol_get_value_expression (add_symbolP)->X_add_symbol; |
| 2509 | } |
| 2510 | |
| 2511 | if (add_symbolP) |
| 2512 | add_symbol_segment = S_GET_SEGMENT (add_symbolP); |
| 2513 | |
| 2514 | if (sub_symbolP) |
| 2515 | { |
| 2516 | resolve_symbol_value (sub_symbolP, 1); |
| 2517 | if (add_symbolP == NULL || add_symbol_segment == absolute_section) |
| 2518 | { |
| 2519 | if (add_symbolP != NULL) |
| 2520 | { |
| 2521 | add_number += S_GET_VALUE (add_symbolP); |
| 2522 | add_symbolP = NULL; |
| 2523 | fixP->fx_addsy = NULL; |
| 2524 | } |
| 2525 | |
| 2526 | /* It's just -sym. */ |
| 2527 | if (S_GET_SEGMENT (sub_symbolP) == absolute_section) |
| 2528 | { |
| 2529 | add_number -= S_GET_VALUE (sub_symbolP); |
| 2530 | fixP->fx_subsy = NULL; |
| 2531 | } |
| 2532 | else if (pcrel |
| 2533 | && S_GET_SEGMENT (sub_symbolP) == this_segment_type) |
| 2534 | { |
| 2535 | /* Should try converting to a constant. */ |
| 2536 | goto bad_sub_reloc; |
| 2537 | } |
| 2538 | else |
| 2539 | bad_sub_reloc: |
| 2540 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2541 | _("Negative of non-absolute symbol %s"), |
| 2542 | S_GET_NAME (sub_symbolP)); |
| 2543 | } |
| 2544 | else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment |
| 2545 | && SEG_NORMAL (add_symbol_segment)) |
| 2546 | { |
| 2547 | /* Difference of 2 symbols from same segment. |
| 2548 | Can't make difference of 2 undefineds: 'value' means |
| 2549 | something different for N_UNDF. */ |
| 2550 | #ifdef TC_I960 |
| 2551 | /* Makes no sense to use the difference of 2 arbitrary symbols |
| 2552 | as the target of a call instruction. */ |
| 2553 | if (fixP->fx_tcbit) |
| 2554 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2555 | _("callj to difference of 2 symbols")); |
| 2556 | #endif /* TC_I960 */ |
| 2557 | add_number += S_GET_VALUE (add_symbolP) - |
| 2558 | S_GET_VALUE (sub_symbolP); |
| 2559 | |
| 2560 | add_symbolP = NULL; |
| 2561 | pcrel = 0; /* No further pcrel processing. */ |
| 2562 | |
| 2563 | /* Let the target machine make the final determination |
| 2564 | as to whether or not a relocation will be needed to |
| 2565 | handle this fixup. */ |
| 2566 | if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type)) |
| 2567 | { |
| 2568 | fixP->fx_pcrel = 0; |
| 2569 | fixP->fx_addsy = NULL; |
| 2570 | fixP->fx_subsy = NULL; |
| 2571 | } |
| 2572 | } |
| 2573 | else |
| 2574 | { |
| 2575 | /* Different segments in subtraction. */ |
| 2576 | know (!(S_IS_EXTERNAL (sub_symbolP) |
| 2577 | && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); |
| 2578 | |
| 2579 | if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) |
| 2580 | add_number -= S_GET_VALUE (sub_symbolP); |
| 2581 | |
| 2582 | #ifdef DIFF_EXPR_OK |
| 2583 | else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type |
| 2584 | #if 0 |
| 2585 | /* Do this even if it's already described as |
| 2586 | pc-relative. For example, on the m68k, an |
| 2587 | operand of "pc@(foo-.-2)" should address |
| 2588 | "foo" in a pc-relative mode. */ |
| 2589 | && pcrel |
| 2590 | #endif |
| 2591 | ) |
| 2592 | { |
| 2593 | /* Make it pc-relative. */ |
| 2594 | add_number += (MD_PCREL_FROM_SECTION (fixP, this_segment_type) |
| 2595 | - S_GET_VALUE (sub_symbolP)); |
| 2596 | pcrel = 1; |
| 2597 | fixP->fx_pcrel = 1; |
| 2598 | sub_symbolP = 0; |
| 2599 | fixP->fx_subsy = 0; |
| 2600 | } |
| 2601 | #endif |
| 2602 | #ifdef UNDEFINED_DIFFERENCE_OK |
| 2603 | /* The PA needs this for PIC code generation. We basically |
| 2604 | don't want to do anything if we have the difference of two |
| 2605 | symbols at this point. */ |
| 2606 | else if (1) |
| 2607 | { |
| 2608 | /* Leave it alone. */ |
| 2609 | } |
| 2610 | #endif |
| 2611 | #ifdef BFD_ASSEMBLER |
| 2612 | else if (fixP->fx_r_type == BFD_RELOC_GPREL32 |
| 2613 | || fixP->fx_r_type == BFD_RELOC_GPREL16) |
| 2614 | { |
| 2615 | /* Leave it alone. */ |
| 2616 | } |
| 2617 | #endif |
| 2618 | else |
| 2619 | { |
| 2620 | char buf[50]; |
| 2621 | sprint_value (buf, fragP->fr_address + where); |
| 2622 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2623 | _("Subtraction of two symbols in different sections \"%s\" {%s section} - \"%s\" {%s section} at file address %s."), |
| 2624 | S_GET_NAME (add_symbolP), |
| 2625 | segment_name (S_GET_SEGMENT (add_symbolP)), |
| 2626 | S_GET_NAME (sub_symbolP), |
| 2627 | segment_name (S_GET_SEGMENT (sub_symbolP)), |
| 2628 | buf); |
| 2629 | } |
| 2630 | } |
| 2631 | } |
| 2632 | |
| 2633 | if (add_symbolP) |
| 2634 | { |
| 2635 | if (add_symbol_segment == this_segment_type && pcrel && !plt |
| 2636 | && TC_RELOC_RTSYM_LOC_FIXUP (fixP)) |
| 2637 | { |
| 2638 | /* This fixup was made when the symbol's segment was |
| 2639 | SEG_UNKNOWN, but it is now in the local segment. |
| 2640 | So we know how to do the address without relocation. */ |
| 2641 | #ifdef TC_I960 |
| 2642 | /* reloc_callj() may replace a 'call' with a 'calls' or a |
| 2643 | 'bal', in which cases it modifies *fixP as appropriate. |
| 2644 | In the case of a 'calls', no further work is required, |
| 2645 | and *fixP has been set up to make the rest of the code |
| 2646 | below a no-op. */ |
| 2647 | reloc_callj (fixP); |
| 2648 | #endif /* TC_I960 */ |
| 2649 | |
| 2650 | add_number += S_GET_VALUE (add_symbolP); |
| 2651 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); |
| 2652 | /* Lie. Don't want further pcrel processing. */ |
| 2653 | pcrel = 0; |
| 2654 | |
| 2655 | /* Let the target machine make the final determination |
| 2656 | as to whether or not a relocation will be needed to |
| 2657 | handle this fixup. */ |
| 2658 | if (!TC_FORCE_RELOCATION (fixP)) |
| 2659 | { |
| 2660 | fixP->fx_pcrel = 0; |
| 2661 | fixP->fx_addsy = NULL; |
| 2662 | } |
| 2663 | } |
| 2664 | else |
| 2665 | { |
| 2666 | if (add_symbol_segment == absolute_section |
| 2667 | && ! pcrel) |
| 2668 | { |
| 2669 | #ifdef TC_I960 |
| 2670 | /* See comment about reloc_callj() above. */ |
| 2671 | reloc_callj (fixP); |
| 2672 | #endif /* TC_I960 */ |
| 2673 | add_number += S_GET_VALUE (add_symbolP); |
| 2674 | |
| 2675 | /* Let the target machine make the final determination |
| 2676 | as to whether or not a relocation will be needed to |
| 2677 | handle this fixup. */ |
| 2678 | |
| 2679 | if (!TC_FORCE_RELOCATION (fixP)) |
| 2680 | { |
| 2681 | fixP->fx_addsy = NULL; |
| 2682 | add_symbolP = NULL; |
| 2683 | } |
| 2684 | } |
| 2685 | else if (add_symbol_segment == undefined_section |
| 2686 | #ifdef BFD_ASSEMBLER |
| 2687 | || bfd_is_com_section (add_symbol_segment) |
| 2688 | #endif |
| 2689 | ) |
| 2690 | { |
| 2691 | #ifdef TC_I960 |
| 2692 | if ((int) fixP->fx_bit_fixP == 13) |
| 2693 | { |
| 2694 | /* This is a COBR instruction. They have only a |
| 2695 | 13-bit displacement and are only to be used |
| 2696 | for local branches: flag as error, don't generate |
| 2697 | relocation. */ |
| 2698 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2699 | _("can't use COBR format with external label")); |
| 2700 | fixP->fx_addsy = NULL; |
| 2701 | fixP->fx_done = 1; |
| 2702 | continue; |
| 2703 | } /* COBR. */ |
| 2704 | #endif /* TC_I960 */ |
| 2705 | |
| 2706 | #ifdef OBJ_COFF |
| 2707 | #ifdef TE_I386AIX |
| 2708 | if (S_IS_COMMON (add_symbolP)) |
| 2709 | add_number += S_GET_VALUE (add_symbolP); |
| 2710 | #endif /* TE_I386AIX */ |
| 2711 | #endif /* OBJ_COFF */ |
| 2712 | ++seg_reloc_count; |
| 2713 | } |
| 2714 | else |
| 2715 | { |
| 2716 | seg_reloc_count++; |
| 2717 | if (TC_FIX_ADJUSTABLE (fixP)) |
| 2718 | add_number += S_GET_VALUE (add_symbolP); |
| 2719 | } |
| 2720 | } |
| 2721 | } |
| 2722 | |
| 2723 | if (pcrel) |
| 2724 | { |
| 2725 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); |
| 2726 | if (add_symbolP == 0) |
| 2727 | { |
| 2728 | #ifndef BFD_ASSEMBLER |
| 2729 | fixP->fx_addsy = &abs_symbol; |
| 2730 | #else |
| 2731 | fixP->fx_addsy = section_symbol (absolute_section); |
| 2732 | #endif |
| 2733 | symbol_mark_used_in_reloc (fixP->fx_addsy); |
| 2734 | ++seg_reloc_count; |
| 2735 | } |
| 2736 | } |
| 2737 | |
| 2738 | if (!fixP->fx_done) |
| 2739 | { |
| 2740 | #ifdef MD_APPLY_FIX3 |
| 2741 | md_apply_fix3 (fixP, &add_number, this_segment_type); |
| 2742 | #else |
| 2743 | #ifdef BFD_ASSEMBLER |
| 2744 | md_apply_fix (fixP, &add_number); |
| 2745 | #else |
| 2746 | md_apply_fix (fixP, add_number); |
| 2747 | #endif |
| 2748 | #endif |
| 2749 | |
| 2750 | #ifndef TC_HANDLES_FX_DONE |
| 2751 | /* If the tc-* files haven't been converted, assume it's handling |
| 2752 | it the old way, where a null fx_addsy means that the fix has |
| 2753 | been applied completely, and no further work is needed. */ |
| 2754 | if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0) |
| 2755 | fixP->fx_done = 1; |
| 2756 | #endif |
| 2757 | } |
| 2758 | |
| 2759 | if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0) |
| 2760 | { |
| 2761 | if ((size_t) size < sizeof (valueT)) |
| 2762 | { |
| 2763 | valueT mask; |
| 2764 | |
| 2765 | mask = 0; |
| 2766 | mask--; /* Set all bits to one. */ |
| 2767 | mask <<= size * 8 - (fixP->fx_signed ? 1 : 0); |
| 2768 | if ((add_number & mask) != 0 && (add_number & mask) != mask) |
| 2769 | { |
| 2770 | char buf[50], buf2[50]; |
| 2771 | sprint_value (buf, fragP->fr_address + where); |
| 2772 | if (add_number > 1000) |
| 2773 | sprint_value (buf2, add_number); |
| 2774 | else |
| 2775 | sprintf (buf2, "%ld", (long) add_number); |
| 2776 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2777 | _("Value of %s too large for field of %d bytes at %s"), |
| 2778 | buf2, size, buf); |
| 2779 | } /* Generic error checking. */ |
| 2780 | } |
| 2781 | #ifdef WARN_SIGNED_OVERFLOW_WORD |
| 2782 | /* Warn if a .word value is too large when treated as a signed |
| 2783 | number. We already know it is not too negative. This is to |
| 2784 | catch over-large switches generated by gcc on the 68k. */ |
| 2785 | if (!flag_signed_overflow_ok |
| 2786 | && size == 2 |
| 2787 | && add_number > 0x7fff) |
| 2788 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2789 | _("Signed .word overflow; switch may be too large; %ld at 0x%lx"), |
| 2790 | (long) add_number, |
| 2791 | (unsigned long) (fragP->fr_address + where)); |
| 2792 | #endif |
| 2793 | } /* Not a bit fix. */ |
| 2794 | |
| 2795 | #ifdef TC_VALIDATE_FIX |
| 2796 | skip: ATTRIBUTE_UNUSED_LABEL |
| 2797 | ; |
| 2798 | #endif |
| 2799 | #ifdef DEBUG5 |
| 2800 | fprintf (stderr, "result:\n"); |
| 2801 | print_fixup (fixP); |
| 2802 | #endif |
| 2803 | } /* For each fixS in this segment. */ |
| 2804 | |
| 2805 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
| 2806 | return seg_reloc_count; |
| 2807 | } |
| 2808 | |
| 2809 | #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */ |
| 2810 | |
| 2811 | void |
| 2812 | number_to_chars_bigendian (buf, val, n) |
| 2813 | char *buf; |
| 2814 | valueT val; |
| 2815 | int n; |
| 2816 | { |
| 2817 | if ((size_t) n > sizeof (val) || n <= 0) |
| 2818 | abort (); |
| 2819 | while (n--) |
| 2820 | { |
| 2821 | buf[n] = val & 0xff; |
| 2822 | val >>= 8; |
| 2823 | } |
| 2824 | } |
| 2825 | |
| 2826 | void |
| 2827 | number_to_chars_littleendian (buf, val, n) |
| 2828 | char *buf; |
| 2829 | valueT val; |
| 2830 | int n; |
| 2831 | { |
| 2832 | if ((size_t) n > sizeof (val) || n <= 0) |
| 2833 | abort (); |
| 2834 | while (n--) |
| 2835 | { |
| 2836 | *buf++ = val & 0xff; |
| 2837 | val >>= 8; |
| 2838 | } |
| 2839 | } |
| 2840 | |
| 2841 | void |
| 2842 | write_print_statistics (file) |
| 2843 | FILE *file; |
| 2844 | { |
| 2845 | fprintf (file, "fixups: %d\n", n_fixups); |
| 2846 | } |
| 2847 | |
| 2848 | /* For debugging. */ |
| 2849 | extern int indent_level; |
| 2850 | |
| 2851 | void |
| 2852 | print_fixup (fixp) |
| 2853 | fixS *fixp; |
| 2854 | { |
| 2855 | indent_level = 1; |
| 2856 | fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line); |
| 2857 | if (fixp->fx_pcrel) |
| 2858 | fprintf (stderr, " pcrel"); |
| 2859 | if (fixp->fx_pcrel_adjust) |
| 2860 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); |
| 2861 | if (fixp->fx_im_disp) |
| 2862 | { |
| 2863 | #ifdef TC_NS32K |
| 2864 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); |
| 2865 | #else |
| 2866 | fprintf (stderr, " im_disp"); |
| 2867 | #endif |
| 2868 | } |
| 2869 | if (fixp->fx_tcbit) |
| 2870 | fprintf (stderr, " tcbit"); |
| 2871 | if (fixp->fx_done) |
| 2872 | fprintf (stderr, " done"); |
| 2873 | fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx", |
| 2874 | fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where, |
| 2875 | (long) fixp->fx_offset, (long) fixp->fx_addnumber); |
| 2876 | #ifdef BFD_ASSEMBLER |
| 2877 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
| 2878 | fixp->fx_r_type); |
| 2879 | #else |
| 2880 | #ifdef NEED_FX_R_TYPE |
| 2881 | fprintf (stderr, " r_type=%d", fixp->fx_r_type); |
| 2882 | #endif |
| 2883 | #endif |
| 2884 | if (fixp->fx_addsy) |
| 2885 | { |
| 2886 | fprintf (stderr, "\n +<"); |
| 2887 | print_symbol_value_1 (stderr, fixp->fx_addsy); |
| 2888 | fprintf (stderr, ">"); |
| 2889 | } |
| 2890 | if (fixp->fx_subsy) |
| 2891 | { |
| 2892 | fprintf (stderr, "\n -<"); |
| 2893 | print_symbol_value_1 (stderr, fixp->fx_subsy); |
| 2894 | fprintf (stderr, ">"); |
| 2895 | } |
| 2896 | fprintf (stderr, "\n"); |
| 2897 | #ifdef TC_FIX_DATA_PRINT |
| 2898 | TC_FIX_DATA_PRINT (stderr, fixp); |
| 2899 | #endif |
| 2900 | } |