1 /* BFD back-end for mmo objects (MMIX-specific object-format). 2 Copyright (C) 2001-2016 Free Software Foundation, Inc. 3 Written by Hans-Peter Nilsson (hp (at) bitrange.com). 4 Infrastructure and other bits originally copied from srec.c and 5 binary.c. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 25 /* 26 SECTION 27 mmo backend 28 29 The mmo object format is used exclusively together with Professor 30 Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator 31 @command{mmix} which is available at 32 @url{http://mmix.cs.hm.edu/src/index.html} 33 understands this format. That package also includes a combined 34 assembler and linker called @command{mmixal}. The mmo format has 35 no advantages feature-wise compared to e.g. ELF. It is a simple 36 non-relocatable object format with no support for archives or 37 debugging information, except for symbol value information and 38 line numbers (which is not yet implemented in BFD). See 39 @url{http://mmix.cs.hm.edu/} for more 40 information about MMIX. The ELF format is used for intermediate 41 object files in the BFD implementation. 42 43 @c We want to xref the symbol table node. A feature in "chew" 44 @c requires that "commands" do not contain spaces in the 45 @c arguments. Hence the hyphen in "Symbol-table". 46 @menu 47 @* File layout:: 48 @* Symbol-table:: 49 @* mmo section mapping:: 50 @end menu 51 52 INODE 53 File layout, Symbol-table, mmo, mmo 54 SUBSECTION 55 File layout 56 57 The mmo file contents is not partitioned into named sections as 58 with e.g.@: ELF. Memory areas is formed by specifying the 59 location of the data that follows. Only the memory area 60 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so 61 it is used for code (and constants) and the area 62 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for 63 writable data. @xref{mmo section mapping}. 64 65 There is provision for specifying ``special data'' of 65536 66 different types. We use type 80 (decimal), arbitrarily chosen the 67 same as the ELF <<e_machine>> number for MMIX, filling it with 68 section information normally found in ELF objects. @xref{mmo 69 section mapping}. 70 71 Contents is entered as 32-bit words, xor:ed over previous 72 contents, always zero-initialized. A word that starts with the 73 byte @samp{0x98} forms a command called a @samp{lopcode}, where 74 the next byte distinguished between the thirteen lopcodes. The 75 two remaining bytes, called the @samp{Y} and @samp{Z} fields, or 76 the @samp{YZ} field (a 16-bit big-endian number), are used for 77 various purposes different for each lopcode. As documented in 78 @url{http://mmix.cs.hm.edu/doc/mmixal.pdf}, 79 the lopcodes are: 80 81 @table @code 82 @item lop_quote 83 0x98000001. The next word is contents, regardless of whether it 84 starts with 0x98 or not. 85 86 @item lop_loc 87 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location 88 directive, setting the location for the next data to the next 89 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), 90 plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment 91 and 2 for the data segment. Beware that the low bits of non- 92 tetrabyte-aligned values are silently discarded when being 93 automatically incremented and when storing contents (in contrast 94 to e.g. its use as current location when followed by lop_fixo 95 et al before the next possibly-quoted tetrabyte contents). 96 97 @item lop_skip 98 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. 99 100 @item lop_fixo 101 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location 102 as 64 bits into the location pointed to by the next 32-bit 103 (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * 104 2^56}. 105 106 @item lop_fixr 107 0x9804YYZZ. @samp{YZ} is stored into the current location plus 108 @math{2 - 4 * YZ}. 109 110 @item lop_fixrx 111 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from 112 the following 32-bit word are used in a manner similar to 113 @samp{YZ} in lop_fixr: it is xor:ed into the current location 114 minus @math{4 * L}. The first byte of the word is 0 or 1. If it 115 is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, 116 then @math{L = (@var{lowest 24 bits of word})}. 117 118 @item lop_file 119 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of 120 32-bit words. Set the file number to @samp{Y} and the line 121 counter to 0. The next @math{Z * 4} bytes contain the file name, 122 padded with zeros if the count is not a multiple of four. The 123 same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for 124 all but the first occurrence. 125 126 @item lop_line 127 0x9807YYZZ. @samp{YZ} is the line number. Together with 128 lop_file, it forms the source location for the next 32-bit word. 129 Note that for each non-lopcode 32-bit word, line numbers are 130 assumed incremented by one. 131 132 @item lop_spec 133 0x9808YYZZ. @samp{YZ} is the type number. Data until the next 134 lopcode other than lop_quote forms special data of type @samp{YZ}. 135 @xref{mmo section mapping}. 136 137 Other types than 80, (or type 80 with a content that does not 138 parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> 139 where @var{n} is the @samp{YZ}-type. The flags for such a 140 sections say not to allocate or load the data. The vma is 0. 141 Contents of multiple occurrences of special data @var{n} is 142 concatenated to the data of the previous lop_spec @var{n}s. The 143 location in data or code at which the lop_spec occurred is lost. 144 145 @item lop_pre 146 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the 147 length of header information in 32-bit words, where the first word 148 tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. 149 150 @item lop_post 151 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all 152 content-generating lopcodes in a program. The @samp{Z} field 153 denotes the value of @samp{rG} at the beginning of the program. 154 The following @math{256 - Z} big-endian 64-bit words are loaded 155 into global registers @samp{$G} @dots{} @samp{$255}. 156 157 @item lop_stab 158 0x980b0000. The next-to-last lopcode in a program. Must follow 159 immediately after the lop_post lopcode and its data. After this 160 lopcode follows all symbols in a compressed format 161 (@pxref{Symbol-table}). 162 163 @item lop_end 164 0x980cYYZZ. The last lopcode in a program. It must follow the 165 lop_stab lopcode and its data. The @samp{YZ} field contains the 166 number of 32-bit words of symbol table information after the 167 preceding lop_stab lopcode. 168 @end table 169 170 Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and 171 <<lop_fixo>> are not generated by BFD, but are handled. They are 172 generated by <<mmixal>>. 173 174 EXAMPLE 175 This trivial one-label, one-instruction file: 176 177 | :Main TRAP 1,2,3 178 179 can be represented this way in mmo: 180 181 | 0x98090101 - lop_pre, one 32-bit word with timestamp. 182 | <timestamp> 183 | 0x98010002 - lop_loc, text segment, using a 64-bit address. 184 | Note that mmixal does not emit this for the file above. 185 | 0x00000000 - Address, high 32 bits. 186 | 0x00000000 - Address, low 32 bits. 187 | 0x98060002 - lop_file, 2 32-bit words for file-name. 188 | 0x74657374 - "test" 189 | 0x2e730000 - ".s\0\0" 190 | 0x98070001 - lop_line, line 1. 191 | 0x00010203 - TRAP 1,2,3 192 | 0x980a00ff - lop_post, setting $255 to 0. 193 | 0x00000000 194 | 0x00000000 195 | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. 196 | 0x203a4040 @xref{Symbol-table}. 197 | 0x10404020 198 | 0x4d206120 199 | 0x69016e00 200 | 0x81000000 201 | 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ 202 203 #include "sysdep.h" 204 #include "bfd.h" 205 #include "libbfd.h" 206 #include "libiberty.h" 207 #include "elf/mmix.h" 208 #include "opcode/mmix.h" 209 210 #define LOP 0x98 211 #define LOP_QUOTE 0 212 #define LOP_LOC 1 213 #define LOP_SKIP 2 214 #define LOP_FIXO 3 215 #define LOP_FIXR 4 216 #define LOP_FIXRX 5 217 #define LOP_FILE 6 218 #define LOP_LINE 7 219 #define LOP_SPEC 8 220 #define LOP_PRE 9 221 #define LOP_POST 10 222 #define LOP_STAB 11 223 #define LOP_END 12 224 225 #define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) 226 #define SPEC_DATA_SECTION 80 227 #define LOP_SPEC_SECTION \ 228 ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) 229 230 /* Must be a power of two. If you change this to be >= 64k, you need a 231 new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ 232 #define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) 233 234 /* An arbitrary number for the maximum length section name size. */ 235 #define MAX_SECTION_NAME_SIZE (1024 * 1024) 236 237 /* A quite arbitrary number for the maximum length section size. */ 238 #define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) 239 240 #define MMO3_WCHAR 0x80 241 #define MMO3_LEFT 0x40 242 #define MMO3_MIDDLE 0x20 243 #define MMO3_RIGHT 0x10 244 #define MMO3_TYPEBITS 0xf 245 #define MMO3_REGQUAL_BITS 0xf 246 #define MMO3_UNDEF 2 247 #define MMO3_DATA 8 248 #define MMO3_SYMBITS 0x2f 249 250 /* Put these everywhere in new code. */ 251 #define FATAL_DEBUG \ 252 _bfd_abort (__FILE__, __LINE__, \ 253 "Internal: Non-debugged code (test-case missing)") 254 255 #define BAD_CASE(x) \ 256 _bfd_abort (__FILE__, __LINE__, \ 257 "bad case for " #x) 258 259 enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; 260 261 /* When scanning the mmo file, a linked list of mmo_symbol 262 structures is built to represent the symbol table (if there is 263 one). */ 264 265 struct mmo_symbol 266 { 267 struct mmo_symbol *next; 268 char *name; 269 bfd_vma value; 270 enum mmo_sym_type sym_type; 271 unsigned int serno; 272 }; 273 274 struct mmo_data_list_struct 275 { 276 struct mmo_data_list_struct *next; 277 bfd_vma where; 278 bfd_size_type size; 279 bfd_size_type allocated_size; 280 bfd_byte data[1]; 281 }; 282 283 typedef struct mmo_data_list_struct mmo_data_list_type; 284 285 struct mmo_symbol_trie 286 { 287 struct mmo_symbol_trie *left; 288 struct mmo_symbol_trie *right; 289 struct mmo_symbol_trie *middle; 290 291 bfd_byte symchar; 292 293 /* A zero name means there's nothing here. */ 294 struct mmo_symbol sym; 295 }; 296 297 /* The mmo tdata information. */ 298 299 struct mmo_data_struct 300 { 301 struct mmo_symbol *symbols; 302 struct mmo_symbol *symtail; 303 asymbol *csymbols; 304 305 /* File representation of time (NULL) when this file was created. */ 306 bfd_byte created[4]; 307 308 /* When we're reading bytes recursively, check this occasionally. 309 Also holds write errors. */ 310 bfd_boolean have_error; 311 312 /* Max symbol length that may appear in the lop_stab table. Note that 313 this table might just hold a subset of symbols for not-really large 314 programs, as it can only be 65536 * 4 bytes large. */ 315 int max_symbol_length; 316 317 /* Here's the symbol we build in lop_stab. */ 318 char *lop_stab_symbol; 319 320 /* Index into lop_stab_symbol for the next character when parsing the 321 symbol information. */ 322 int symbol_position; 323 324 /* When creating arbitrary sections, we need to count section numbers. */ 325 int sec_no; 326 327 /* When writing or reading byte-wise, we need to count the bytes 328 within a 32-bit word. */ 329 int byte_no; 330 331 /* We also need a buffer to hold the bytes we count reading or writing. */ 332 bfd_byte buf[4]; 333 334 /* Whether we've calculated symbol consistency requirement yet. We do this 335 when-needed, which must be at some time after all section 336 contents is known. */ 337 bfd_boolean symbol_consistency_override_calculated; 338 339 /* Whether to consistency-check symbol values, in particular "Main". */ 340 bfd_boolean ignore_symbol_consistency; 341 }; 342 343 typedef struct mmo_data_struct tdata_type; 344 345 struct mmo_section_data_struct 346 { 347 mmo_data_list_type *head; 348 mmo_data_list_type *tail; 349 }; 350 351 #define mmo_section_data(sec) \ 352 ((struct mmo_section_data_struct *) (sec)->used_by_bfd) 353 354 /* These structures are used in bfd_map_over_sections constructs. */ 355 356 /* Used when writing out sections; all but the register contents section 357 which is stored in reg_section. */ 358 struct mmo_write_sec_info 359 { 360 asection *reg_section; 361 bfd_boolean retval; 362 }; 363 364 /* Used when trying to find a section corresponding to addr. */ 365 struct mmo_find_sec_info 366 { 367 asection *sec; 368 bfd_vma addr; 369 }; 370 371 static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); 372 static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); 373 static void mmo_find_sec_w_addr (bfd *, asection *, void *); 374 static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); 375 static asection *mmo_make_section (bfd *, const char *); 376 static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 377 static void mmo_print_symbol (bfd *, void *, asymbol *, 378 bfd_print_symbol_type); 379 static void mmo_init (void); 380 static bfd_boolean mmo_mkobject (bfd *); 381 static bfd_boolean mmo_scan (bfd *); 382 static asection *mmo_decide_section (bfd *, bfd_vma); 383 static asection *mmo_get_generic_spec_data_section (bfd *, int); 384 static asection *mmo_get_spec_section (bfd *, int); 385 static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); 386 static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); 387 static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); 388 static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); 389 static const bfd_target *mmo_object_p (bfd *); 390 static void mmo_map_set_sizes (bfd *, asection *, void *); 391 static bfd_boolean mmo_get_symbols (bfd *); 392 static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, 393 enum mmo_sym_type, unsigned int); 394 static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, 395 file_ptr, bfd_size_type); 396 static long mmo_get_symtab_upper_bound (bfd *); 397 static long mmo_canonicalize_symtab (bfd *, asymbol **); 398 static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 399 static void mmo_print_symbol (bfd *, void *, asymbol *, 400 bfd_print_symbol_type); 401 static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, 402 file_ptr, bfd_size_type); 403 static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); 404 static bfd_boolean mmo_internal_write_header (bfd *); 405 static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); 406 static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, 407 const struct mmo_symbol *); 408 static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); 409 static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); 410 static void mmo_beb128_out (bfd *, int, int); 411 static bfd_boolean mmo_internal_write_section (bfd *, asection *); 412 static void mmo_write_tetra (bfd *, unsigned int); 413 static void mmo_write_tetra_raw (bfd *, unsigned int); 414 static void mmo_write_octa (bfd *, bfd_vma); 415 static void mmo_write_octa_raw (bfd *, bfd_vma); 416 static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); 417 static bfd_boolean mmo_flush_chunk (bfd *); 418 static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, 419 unsigned int, bfd_vma *); 420 static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); 421 static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); 422 static bfd_boolean mmo_write_symbols_and_terminator (bfd *); 423 static flagword mmo_sec_flags_from_bfd_flags (flagword); 424 static flagword bfd_sec_flags_from_mmo_flags (flagword); 425 static bfd_byte mmo_get_byte (bfd *); 426 static void mmo_write_byte (bfd *, bfd_byte); 427 static bfd_boolean mmo_new_section_hook (bfd *, asection *); 428 static int mmo_sort_mmo_symbols (const void *, const void *); 429 static bfd_boolean mmo_write_object_contents (bfd *); 430 static bfd_boolean mmo_write_section_description (bfd *, asection *); 431 static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p (bfd *, 432 asection *); 433 434 /* Global "const" variables initialized once. Must not depend on 435 particular input or caller; put such things into the bfd or elsewhere. 436 Look ma, no static per-invocation data! */ 437 438 static 439 char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive 440 codes; sorry EBCDIC:ers!). */ 441 + 'Z' - 'A' + 1 + 'z' - 'a' + 1 442 /* Digits. */ 443 + 10 444 /* ':' and '_'. */ 445 + 1 + 1 446 /* Codes higher than 126. */ 447 + 256 - 126 448 /* Ending zero. */ 449 + 1]; 450 451 452 /* Get section SECNAME or create one if it doesn't exist. When creating 453 one, new memory for the name is allocated. */ 454 455 static asection * 456 mmo_make_section (bfd *abfd, const char *secname) 457 { 458 asection *sec = bfd_get_section_by_name (abfd, secname); 459 460 if (sec == NULL) 461 { 462 char *newsecname = strdup (secname); 463 464 if (newsecname == NULL) 465 { 466 (*_bfd_error_handler) 467 (_("%s: No core to allocate section name %s\n"), 468 bfd_get_filename (abfd), secname); 469 bfd_set_error (bfd_error_system_call); 470 return NULL; 471 } 472 sec = bfd_make_section (abfd, newsecname); 473 } 474 475 return sec; 476 } 477 478 /* Nothing to do, but keep as a placeholder if we need it. 479 Note that state that might differ between bfd:s must not be initialized 480 here, nor must it be static. Add it to tdata information instead. */ 481 482 static void 483 mmo_init (void) 484 { 485 static bfd_boolean inited = FALSE; 486 int i = 0; 487 int j = 0; 488 static const char letters[] 489 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; 490 491 if (inited) 492 return; 493 inited = TRUE; 494 495 /* Fill in the set of valid symbol characters. */ 496 strcpy (valid_mmo_symbol_character_set, letters); 497 i = strlen (letters); 498 499 for (j = 126; j < 256; j++) 500 valid_mmo_symbol_character_set[i++] = j; 501 } 502 503 /* Check whether an existing file is an mmo file. */ 504 505 static const bfd_target * 506 mmo_object_p (bfd *abfd) 507 { 508 struct stat statbuf; 509 bfd_byte b[4]; 510 511 mmo_init (); 512 513 if (bfd_stat (abfd, &statbuf) < 0 514 || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 515 || bfd_bread (b, 4, abfd) != 4) 516 goto bad_final; 517 518 /* All mmo files are a multiple of four bytes long. 519 Only recognize version one. */ 520 if ((statbuf.st_size % 4) != 0 521 || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1) 522 goto bad_format; 523 524 /* Get the last 32-bit word. */ 525 if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0 526 || bfd_bread (b, 4, abfd) != 4) 527 goto bad_final; 528 529 /* Check if the file ends in a lop_end lopcode. */ 530 if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd)) 531 goto bad_format; 532 533 /* Compute an upper bound on the max symbol length. Not really 534 important as all of the symbol information can only be 256k. */ 535 abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4; 536 abfd->tdata.mmo_data->lop_stab_symbol 537 = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1); 538 539 if (abfd->tdata.mmo_data->lop_stab_symbol == NULL) 540 { 541 (*_bfd_error_handler) 542 (_("%s: No core to allocate a symbol %d bytes long\n"), 543 bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length); 544 goto bad_final; 545 } 546 547 /* Read in everything. */ 548 if (! mmo_scan (abfd)) 549 goto bad_format_free; 550 551 if (abfd->symcount > 0) 552 abfd->flags |= HAS_SYMS; 553 554 /* You'll have to tweak this if you want to use this format for other 555 arches (not recommended due to its small-size limitations). Look at 556 the ELF format for how to make it target-generic. */ 557 if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0)) 558 goto bad_format_free; 559 560 return abfd->xvec; 561 562 bad_format_free: 563 free (abfd->tdata.mmo_data->lop_stab_symbol); 564 bad_format: 565 bfd_set_error (bfd_error_wrong_format); 566 bad_final: 567 return NULL; 568 } 569 570 /* Set up the mmo tdata information. */ 571 572 static bfd_boolean 573 mmo_mkobject (bfd *abfd) 574 { 575 mmo_init (); 576 577 if (abfd->tdata.mmo_data == NULL) 578 { 579 time_t created; 580 581 /* All fields are zero-initialized, so we don't have to explicitly 582 initialize most. */ 583 tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type)); 584 if (tdata == NULL) 585 return FALSE; 586 587 created = time (NULL); 588 bfd_put_32 (abfd, created, tdata->created); 589 590 abfd->tdata.mmo_data = tdata; 591 } 592 593 return TRUE; 594 } 595 596 static bfd_boolean 597 mmo_section_has_contents (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p ATTRIBUTE_UNUSED) 598 { 599 /* The point is to match what --extract-symbols does (well, negated). */ 600 return bfd_get_section_size (sec) != 0; 601 } 602 603 /* Find out whether we should omit symbol consistency checks for this 604 bfd and cache the value. 605 606 This function must only be called when all section contents is 607 known. However, calculating symbol consistency at the time the 608 private BFD data is initialized is too late for some uses. */ 609 610 static bfd_boolean 611 mmo_ignore_symbol_consistency (bfd *abfd) 612 { 613 if (!abfd->tdata.mmo_data->symbol_consistency_override_calculated) 614 { 615 abfd->tdata.mmo_data->ignore_symbol_consistency = 616 bfd_sections_find_if (abfd, mmo_section_has_contents, NULL) == NULL; 617 618 abfd->tdata.mmo_data->symbol_consistency_override_calculated = TRUE; 619 } 620 621 return abfd->tdata.mmo_data->ignore_symbol_consistency; 622 } 623 624 static bfd_boolean 625 mmo_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 626 { 627 if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour 628 || bfd_get_flavour (obfd) != bfd_target_mmo_flavour) 629 return TRUE; 630 631 /* Copy the time the copied-from file was created. If people want the 632 time the file was last *modified*, they have that in the normal file 633 information. */ 634 memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created, 635 sizeof (obfd->tdata.mmo_data->created)); 636 return TRUE; 637 } 638 639 /* Helper functions for mmo_decide_section, used through 640 bfd_map_over_sections. */ 641 642 static void 643 mmo_find_sec_w_addr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) 644 { 645 struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; 646 bfd_vma vma = bfd_get_section_vma (abfd, sec); 647 648 /* Ignore sections that aren't loaded. */ 649 if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) 650 != (SEC_LOAD | SEC_ALLOC)) 651 return; 652 653 if (infop->addr >= vma && infop->addr < vma + sec->size) 654 infop->sec = sec; 655 } 656 657 static void 658 mmo_find_sec_w_addr_grow (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) 659 { 660 struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; 661 bfd_vma vma = bfd_get_section_vma (abfd, sec); 662 663 /* Ignore sections that aren't loaded. */ 664 if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) 665 != (SEC_LOAD | SEC_ALLOC)) 666 return; 667 668 if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE) 669 infop->sec = sec; 670 } 671 672 /* Find a section that corresponds to a VMA. Automatically create .text 673 or .data and set current section to it, depending on what vma. If we 674 can't deduce a section, make one up as ".MMIX.sec.N", where N is an 675 increasing number. */ 676 677 static asection * 678 mmo_decide_section (bfd *abfd, bfd_vma vma) 679 { 680 asection *sec = NULL; 681 char sec_name[sizeof (".MMIX.sec.") + 20]; 682 struct mmo_find_sec_info info; 683 684 info.addr = vma; 685 info.sec = NULL; 686 687 /* First see if there's a section that would match exactly. */ 688 bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info); 689 690 if (info.sec != NULL) 691 return info.sec; 692 693 /* If there's no such section, try and expand one of the existing ones, 694 up to a limit. Make sure we have .text and .data before we try that; 695 create them corresponding to expected addresses and set flags to make 696 them match the "loaded and with contents" expectation. */ 697 if ((vma >> 56) == 0) 698 { 699 sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); 700 701 if (sec == NULL) 702 return NULL; 703 704 if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) 705 return NULL; 706 707 if (! bfd_set_section_flags (abfd, sec, 708 bfd_get_section_flags (abfd, sec) 709 | SEC_CODE | SEC_LOAD | SEC_ALLOC)) 710 return NULL; 711 } 712 else if ((vma >> 56) == 0x20) 713 { 714 sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME); 715 716 if (sec == NULL) 717 return NULL; 718 719 if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) 720 return NULL; 721 722 if (! bfd_set_section_flags (abfd, sec, 723 bfd_get_section_flags (abfd, sec) 724 | SEC_LOAD | SEC_ALLOC)) 725 return NULL; 726 } 727 728 bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info); 729 730 if (info.sec != NULL) 731 return info.sec; 732 733 /* If there's still no suitable section, make a new one. */ 734 sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++); 735 sec = mmo_make_section (abfd, sec_name); 736 737 if (! sec->user_set_vma && ! bfd_set_section_vma (abfd, sec, vma)) 738 return NULL; 739 740 if (! bfd_set_section_flags (abfd, sec, 741 bfd_get_section_flags (abfd, sec) 742 | SEC_LOAD | SEC_ALLOC)) 743 return NULL; 744 return sec; 745 } 746 747 /* Xor in a 64-bit value VALUE at VMA. */ 748 749 static INLINE void 750 mmo_xore_64 (asection *sec, bfd_vma vma, bfd_vma value) 751 { 752 bfd_byte *loc = mmo_get_loc (sec, vma, 8); 753 bfd_vma prev = bfd_get_64 (sec->owner, loc); 754 755 value ^= prev; 756 bfd_put_64 (sec->owner, value, loc); 757 } 758 759 /* Xor in a 32-bit value VALUE at VMA. */ 760 761 static INLINE void 762 mmo_xore_32 (asection *sec, bfd_vma vma, unsigned int value) 763 { 764 bfd_byte *loc = mmo_get_loc (sec, vma, 4); 765 unsigned int prev = bfd_get_32 (sec->owner, loc); 766 767 value ^= prev; 768 bfd_put_32 (sec->owner, value, loc); 769 } 770 771 /* Xor in a 16-bit value VALUE at VMA. */ 772 773 static INLINE void 774 mmo_xore_16 (asection *sec, bfd_vma vma, unsigned int value) 775 { 776 bfd_byte *loc = mmo_get_loc (sec, vma, 2); 777 unsigned int prev = bfd_get_16 (sec->owner, loc); 778 779 value ^= prev; 780 bfd_put_16 (sec->owner, value, loc); 781 } 782 783 /* Write a 32-bit word to output file, no lop_quote generated. */ 784 785 static INLINE void 786 mmo_write_tetra_raw (bfd *abfd, unsigned int value) 787 { 788 bfd_byte buf[4]; 789 790 bfd_put_32 (abfd, value, buf); 791 792 if (bfd_bwrite (buf, 4, abfd) != 4) 793 abfd->tdata.mmo_data->have_error = TRUE; 794 } 795 796 /* Write a 32-bit word to output file; lop_quote if necessary. */ 797 798 static INLINE void 799 mmo_write_tetra (bfd *abfd, unsigned int value) 800 { 801 if (((value >> 24) & 0xff) == LOP) 802 mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); 803 804 mmo_write_tetra_raw (abfd, value); 805 } 806 807 /* Write a 64-bit word to output file, perhaps with lop_quoting. */ 808 809 static INLINE void 810 mmo_write_octa (bfd *abfd, bfd_vma value) 811 { 812 mmo_write_tetra (abfd, (unsigned int) (value >> 32)); 813 mmo_write_tetra (abfd, (unsigned int) value); 814 } 815 816 /* Write a 64-bit word to output file, without lop_quoting. */ 817 818 static INLINE void 819 mmo_write_octa_raw (bfd *abfd, bfd_vma value) 820 { 821 mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32)); 822 mmo_write_tetra_raw (abfd, (unsigned int) value); 823 } 824 825 /* Write quoted contents. Intended to be called multiple times in 826 sequence, followed by a call to mmo_flush_chunk. */ 827 828 static INLINE bfd_boolean 829 mmo_write_chunk (bfd *abfd, const bfd_byte *loc, unsigned int len) 830 { 831 bfd_boolean retval = TRUE; 832 struct mmo_data_struct *mmop = abfd->tdata.mmo_data; 833 834 /* Fill up a tetra from bytes remaining from a previous chunk. */ 835 if (mmop->byte_no != 0) 836 { 837 while (mmop->byte_no < 4 && len != 0) 838 { 839 mmop->buf[mmop->byte_no++] = *loc++; 840 len--; 841 } 842 843 if (mmop->byte_no == 4) 844 { 845 mmo_write_tetra (abfd, bfd_get_32 (abfd, mmop->buf)); 846 mmop->byte_no = 0; 847 } 848 } 849 850 while (len >= 4) 851 { 852 if (loc[0] == LOP) 853 mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); 854 855 retval = (retval 856 && ! mmop->have_error 857 && 4 == bfd_bwrite (loc, 4, abfd)); 858 859 loc += 4; 860 len -= 4; 861 } 862 863 if (len) 864 { 865 /* We must have flushed a previous remainder if we get one from 866 this chunk too. */ 867 BFD_ASSERT (mmop->byte_no == 0); 868 memcpy (mmop->buf, loc, len); 869 mmop->byte_no = len; 870 } 871 872 if (! retval) 873 mmop->have_error = TRUE; 874 return retval; 875 } 876 877 /* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to 878 4 bytes. */ 879 880 static INLINE bfd_boolean 881 mmo_flush_chunk (bfd *abfd) 882 { 883 if (abfd->tdata.mmo_data->byte_no != 0) 884 { 885 memset (abfd->tdata.mmo_data->buf + abfd->tdata.mmo_data->byte_no, 886 0, 4 - abfd->tdata.mmo_data->byte_no); 887 mmo_write_tetra (abfd, 888 bfd_get_32 (abfd, abfd->tdata.mmo_data->buf)); 889 abfd->tdata.mmo_data->byte_no = 0; 890 } 891 892 return ! abfd->tdata.mmo_data->have_error; 893 } 894 895 /* Same, but from a list. */ 896 897 static INLINE bfd_boolean 898 mmo_write_chunk_list (bfd *abfd, mmo_data_list_type *datap) 899 { 900 for (; datap != NULL; datap = datap->next) 901 if (! mmo_write_chunk (abfd, datap->data, datap->size)) 902 return FALSE; 903 904 return mmo_flush_chunk (abfd); 905 } 906 907 /* Write a lop_loc and some contents. A caller needs to call 908 mmo_flush_chunk after calling this function. The location is only 909 output if different than *LAST_VMAP, which is updated after this call. */ 910 911 static bfd_boolean 912 mmo_write_loc_chunk (bfd *abfd, bfd_vma vma, const bfd_byte *loc, 913 unsigned int len, bfd_vma *last_vmap) 914 { 915 /* Find an initial and trailing section of zero (aligned) tetras; we don't 916 need to write out zeros. FIXME: When we do this, we should emit 917 section size and address specifiers, else objcopy can't always perform 918 an identity translation. Only do this if we *don't* have left-over 919 data from a previous write (and will not add any) or else the vma of 920 this chunk is *not* the next address, because then data isn't 921 tetrabyte-aligned and we're concatenating to that left-over data. */ 922 923 if ((vma & 3) == 0 924 && (abfd->tdata.mmo_data->byte_no == 0 || vma != *last_vmap)) 925 { 926 while (len > 4 && bfd_get_32 (abfd, loc) == 0) 927 { 928 vma += 4; 929 len -= 4; 930 loc += 4; 931 } 932 933 if ((len & 3) == 0) 934 while (len > 4 && bfd_get_32 (abfd, loc + len - 4) == 0) 935 len -= 4; 936 } 937 938 /* Only write out the location if it's different than the one the caller 939 (supposedly) previously handled, accounting for omitted leading zeros. */ 940 if (vma != *last_vmap) 941 { 942 /* We might be in the middle of a sequence. */ 943 mmo_flush_chunk (abfd); 944 945 /* This should not happen during normal usage, but can presumably 946 happen with an erroneous linker-script, so handle gracefully. 947 Avoid Knuth-specific terms in the message, such as "tetrabyte". 948 Note that this function will get non-4-multiple lengths and 949 unaligned vmas but those come in tuples (mostly pairs) and are 950 continuous (i.e. the if-condition above false) and they are 951 group-wise aligned. */ 952 if ((vma & 3) != 0) 953 { 954 (*_bfd_error_handler) 955 (_("%s: attempt to emit contents at non-multiple-of-4 address 0x%lx\n"), 956 bfd_get_filename (abfd), (unsigned long) vma); 957 bfd_set_error (bfd_error_bad_value); 958 return FALSE; 959 } 960 961 /* We always write the location as 64 bits; no use saving bytes 962 here. */ 963 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2); 964 mmo_write_octa_raw (abfd, vma); 965 } 966 967 /* Update to reflect end of this chunk, with trailing zeros omitted. */ 968 *last_vmap = vma + len; 969 970 return (! abfd->tdata.mmo_data->have_error 971 && mmo_write_chunk (abfd, loc, len)); 972 } 973 974 /* Same, but from a list. */ 975 976 static INLINE bfd_boolean 977 mmo_write_loc_chunk_list (bfd *abfd, mmo_data_list_type *datap) 978 { 979 /* Get an address different than the address of the first chunk. */ 980 bfd_vma last_vma = datap ? datap->where - 1 : 0; 981 982 for (; datap != NULL; datap = datap->next) 983 if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size, 984 &last_vma)) 985 return FALSE; 986 987 return mmo_flush_chunk (abfd); 988 } 989 990 /* Make a .MMIX.spec_data.N section. */ 991 992 static asection * 993 mmo_get_generic_spec_data_section (bfd *abfd, int spec_data_number) 994 { 995 asection *sec; 996 char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20] 997 = MMIX_OTHER_SPEC_SECTION_PREFIX; 998 999 sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX), 1000 "%d", spec_data_number); 1001 1002 sec = mmo_make_section (abfd, secname); 1003 1004 return sec; 1005 } 1006 1007 /* Make a special section for SPEC_DATA_NUMBER. If it is the one we use 1008 ourselves, parse some of its data to get at the section name. */ 1009 1010 static asection * 1011 mmo_get_spec_section (bfd *abfd, int spec_data_number) 1012 { 1013 char *secname; 1014 asection *sec; 1015 bfd_byte buf[4]; 1016 unsigned int secname_length; 1017 unsigned int i; 1018 bfd_vma section_length; 1019 bfd_vma section_vma; 1020 mmo_data_list_type *loc; 1021 flagword flags; 1022 long orig_pos; 1023 1024 /* If this isn't the "special" special data, then make a placeholder 1025 section. */ 1026 if (spec_data_number != SPEC_DATA_SECTION) 1027 return mmo_get_generic_spec_data_section (abfd, spec_data_number); 1028 1029 /* Seek back to this position if there was a format error. */ 1030 orig_pos = bfd_tell (abfd); 1031 1032 /* Read the length (in 32-bit words). */ 1033 if (bfd_bread (buf, 4, abfd) != 4) 1034 goto format_error; 1035 1036 if (buf[0] == LOP) 1037 { 1038 if (buf[1] != LOP_QUOTE) 1039 goto format_error; 1040 1041 if (bfd_bread (buf, 4, abfd) != 4) 1042 goto format_error; 1043 } 1044 1045 /* We don't care to keep the name length accurate. It's 1046 zero-terminated. */ 1047 secname_length = bfd_get_32 (abfd, buf) * 4; 1048 1049 /* Check section name length for sanity. */ 1050 if (secname_length > MAX_SECTION_NAME_SIZE) 1051 goto format_error; 1052 1053 /* This should be free'd regardless if a section is created. */ 1054 secname = bfd_malloc (secname_length + 1); 1055 secname[secname_length] = 0; 1056 1057 for (i = 0; i < secname_length / 4; i++) 1058 { 1059 if (bfd_bread (secname + i * 4, 4, abfd) != 4) 1060 goto format_error_free; 1061 1062 if (secname[i * 4] == (char) LOP) 1063 { 1064 /* A bit of overkill, but we handle char 0x98 in a section name, 1065 and recognize misparsing. */ 1066 if (secname[i * 4 + 1] != LOP_QUOTE 1067 || bfd_bread (secname + i * 4, 4, abfd) != 4) 1068 /* Whoops. We thought this was a name, and now we found a 1069 non-lop_quote lopcode before we parsed the whole length of 1070 the name. Signal end-of-file in the same manner. */ 1071 goto format_error_free; 1072 } 1073 } 1074 1075 /* Get the section flags. */ 1076 if (bfd_bread (buf, 4, abfd) != 4 1077 || (buf[0] == LOP 1078 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1079 goto format_error_free; 1080 1081 flags = bfd_get_32 (abfd, buf); 1082 1083 /* Get the section length. */ 1084 if (bfd_bread (buf, 4, abfd) != 4 1085 || (buf[0] == LOP 1086 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1087 goto format_error_free; 1088 1089 section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32; 1090 1091 /* That's the first, high-part. Now get the low part. */ 1092 1093 if (bfd_bread (buf, 4, abfd) != 4 1094 || (buf[0] == LOP 1095 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1096 goto format_error_free; 1097 1098 section_length |= (bfd_vma) bfd_get_32 (abfd, buf); 1099 1100 /* Check the section length for sanity. */ 1101 if (section_length > MAX_ARTIFICIAL_SECTION_SIZE) 1102 goto format_error_free; 1103 1104 /* Get the section VMA. */ 1105 if (bfd_bread (buf, 4, abfd) != 4 1106 || (buf[0] == LOP 1107 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1108 goto format_error_free; 1109 1110 section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32; 1111 1112 /* That's the first, high-part. Now get the low part. */ 1113 if (bfd_bread (buf, 4, abfd) != 4 1114 || (buf[0] == LOP 1115 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1116 goto format_error_free; 1117 1118 section_vma |= (bfd_vma) bfd_get_32 (abfd, buf); 1119 1120 sec = mmo_make_section (abfd, secname); 1121 free (secname); 1122 if (sec == NULL) 1123 goto format_error; 1124 1125 /* We allocate a buffer here for the advertised size, with head room for 1126 tetrabyte alignment. */ 1127 loc = bfd_zmalloc (section_length + 3 1128 + sizeof (struct mmo_data_list_struct)); 1129 if (loc == NULL) 1130 goto format_error; 1131 1132 /* Use a TETRA-rounded size for the allocated buffer; we set the 1133 "visible" section size below. */ 1134 loc->size = (section_length + 3) & ~3; 1135 1136 /* Add in the section flags we found to those bfd entered during this 1137 process and set the contents. */ 1138 if (! bfd_set_section_flags (abfd, sec, 1139 bfd_sec_flags_from_mmo_flags (flags) 1140 | bfd_get_section_flags (abfd, sec) 1141 | (section_length != 0 ? SEC_HAS_CONTENTS : 0)) 1142 || ! bfd_set_section_size (abfd, sec, sec->size + section_length) 1143 /* Set VMA only for the first occurrence. */ 1144 || (! sec->user_set_vma 1145 && ! bfd_set_section_vma (abfd, sec, section_vma))) 1146 { 1147 /* If we get an error for any of the calls above, signal more than 1148 just a format error for the spec section. */ 1149 return NULL; 1150 } 1151 1152 loc->next = NULL; 1153 if (mmo_section_data (sec)->tail != NULL) 1154 mmo_section_data (sec)->tail->next = loc; 1155 else 1156 mmo_section_data (sec)->head = loc; 1157 mmo_section_data (sec)->tail = loc; 1158 loc->where = section_vma; 1159 1160 return sec; 1161 1162 format_error_free: 1163 free (secname); 1164 format_error: 1165 if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0) 1166 return NULL; 1167 1168 return mmo_get_generic_spec_data_section (abfd, spec_data_number); 1169 } 1170 1171 /* Read a byte, but read from file in multiples of 32-bit words. */ 1172 1173 static bfd_byte 1174 mmo_get_byte (bfd *abfd) 1175 { 1176 bfd_byte retval; 1177 1178 if (abfd->tdata.mmo_data->byte_no == 0) 1179 { 1180 if (! abfd->tdata.mmo_data->have_error 1181 && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 1182 { 1183 abfd->tdata.mmo_data->have_error = TRUE; 1184 1185 /* A value somewhat safe against tripping on some inconsistency 1186 when mopping up after this error. */ 1187 return 128; 1188 } 1189 } 1190 1191 retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no]; 1192 abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4; 1193 1194 return retval; 1195 } 1196 1197 /* Write a byte, in multiples of 32-bit words. */ 1198 1199 static void 1200 mmo_write_byte (bfd *abfd, bfd_byte value) 1201 { 1202 abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value; 1203 if ((abfd->tdata.mmo_data->byte_no % 4) == 0) 1204 { 1205 if (! abfd->tdata.mmo_data->have_error 1206 && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 1207 abfd->tdata.mmo_data->have_error = TRUE; 1208 } 1209 } 1210 1211 /* Create a symbol. */ 1212 1213 static bfd_boolean 1214 mmo_create_symbol (bfd *abfd, const char *symname, bfd_vma addr, enum 1215 mmo_sym_type sym_type, unsigned int serno) 1216 { 1217 struct mmo_symbol *n; 1218 1219 n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol)); 1220 if (n == NULL) 1221 return FALSE; 1222 1223 n->name = bfd_alloc (abfd, strlen (symname) + 1); 1224 if (n->name == NULL) 1225 return FALSE; 1226 1227 strcpy (n->name, symname); 1228 1229 n->value = addr; 1230 n->sym_type = sym_type; 1231 n->serno = serno; 1232 1233 if (abfd->tdata.mmo_data->symbols == NULL) 1234 abfd->tdata.mmo_data->symbols = n; 1235 else 1236 abfd->tdata.mmo_data->symtail->next = n; 1237 abfd->tdata.mmo_data->symtail = n; 1238 n->next = NULL; 1239 1240 ++abfd->symcount; 1241 1242 /* Check that :Main equals the last octa of the .MMIX.reg_contents 1243 section, as it's the one place we're sure to pass when reading a mmo 1244 object. For written objects, we do it while setting the symbol 1245 table. */ 1246 if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0 1247 && bfd_get_start_address (abfd) != addr 1248 && !mmo_ignore_symbol_consistency (abfd)) 1249 { 1250 (*_bfd_error_handler) 1251 (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"), 1252 bfd_get_filename (abfd)); 1253 bfd_set_error (bfd_error_bad_value); 1254 return FALSE; 1255 } 1256 1257 return TRUE; 1258 } 1259 1260 /* Read in symbols. */ 1261 1262 static bfd_boolean 1263 mmo_get_symbols (bfd *abfd) 1264 { 1265 /* 1266 INODE 1267 Symbol-table, mmo section mapping, File layout, mmo 1268 SUBSECTION 1269 Symbol table format 1270 1271 From mmixal.w (or really, the generated mmixal.tex) in the 1272 MMIXware package which also contains the @command{mmix} simulator: 1273 ``Symbols are stored and retrieved by means of a @samp{ternary 1274 search trie}, following ideas of Bentley and Sedgewick. (See 1275 ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369; 1276 R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@: 1277 Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a 1278 character, and there are branches to subtries for the cases where 1279 a given character is less than, equal to, or greater than the 1280 character in the trie. There also is a pointer to a symbol table 1281 entry if a symbol ends at the current node.'' 1282 1283 So it's a tree encoded as a stream of bytes. The stream of bytes 1284 acts on a single virtual global symbol, adding and removing 1285 characters and signalling complete symbol points. Here, we read 1286 the stream and create symbols at the completion points. 1287 1288 First, there's a control byte <<m>>. If any of the listed bits 1289 in <<m>> is nonzero, we execute what stands at the right, in 1290 the listed order: 1291 1292 | (MMO3_LEFT) 1293 | 0x40 - Traverse left trie. 1294 | (Read a new command byte and recurse.) 1295 | 1296 | (MMO3_SYMBITS) 1297 | 0x2f - Read the next byte as a character and store it in the 1298 | current character position; increment character position. 1299 | Test the bits of <<m>>: 1300 | 1301 | (MMO3_WCHAR) 1302 | 0x80 - The character is 16-bit (so read another byte, 1303 | merge into current character. 1304 | 1305 | (MMO3_TYPEBITS) 1306 | 0xf - We have a complete symbol; parse the type, value 1307 | and serial number and do what should be done 1308 | with a symbol. The type and length information 1309 | is in j = (m & 0xf). 1310 | 1311 | (MMO3_REGQUAL_BITS) 1312 | j == 0xf: A register variable. The following 1313 | byte tells which register. 1314 | j <= 8: An absolute symbol. Read j bytes as the 1315 | big-endian number the symbol equals. 1316 | A j = 2 with two zero bytes denotes an 1317 | unknown symbol. 1318 | j > 8: As with j <= 8, but add (0x20 << 56) 1319 | to the value in the following j - 8 1320 | bytes. 1321 | 1322 | Then comes the serial number, as a variant of 1323 | uleb128, but better named ubeb128: 1324 | Read bytes and shift the previous value left 7 1325 | (multiply by 128). Add in the new byte, repeat 1326 | until a byte has bit 7 set. The serial number 1327 | is the computed value minus 128. 1328 | 1329 | (MMO3_MIDDLE) 1330 | 0x20 - Traverse middle trie. (Read a new command byte 1331 | and recurse.) Decrement character position. 1332 | 1333 | (MMO3_RIGHT) 1334 | 0x10 - Traverse right trie. (Read a new command byte and 1335 | recurse.) 1336 1337 Let's look again at the <<lop_stab>> for the trivial file 1338 (@pxref{File layout}). 1339 1340 | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. 1341 | 0x203a4040 1342 | 0x10404020 1343 | 0x4d206120 1344 | 0x69016e00 1345 | 0x81000000 1346 1347 This forms the trivial trie (note that the path between ``:'' and 1348 ``M'' is redundant): 1349 1350 | 203a ":" 1351 | 40 / 1352 | 40 / 1353 | 10 \ 1354 | 40 / 1355 | 40 / 1356 | 204d "M" 1357 | 2061 "a" 1358 | 2069 "i" 1359 | 016e "n" is the last character in a full symbol, and 1360 | with a value represented in one byte. 1361 | 00 The value is 0. 1362 | 81 The serial number is 1. */ 1363 1364 bfd_byte m = mmo_get_byte (abfd); 1365 1366 /* Check first if we have a bad hair day. */ 1367 if (abfd->tdata.mmo_data->have_error) 1368 return FALSE; 1369 1370 if (m & MMO3_LEFT) 1371 /* Traverse left trie. */ 1372 mmo_get_symbols (abfd); 1373 1374 if (m & MMO3_SYMBITS) 1375 { 1376 bfd_byte c = mmo_get_byte (abfd); 1377 bfd_byte j = m & MMO3_TYPEBITS; 1378 bfd_vma addr = 0; 1379 enum mmo_sym_type sym_type; 1380 unsigned int serno = 0; 1381 bfd_byte k; 1382 1383 if (m & MMO3_WCHAR) 1384 { 1385 bfd_byte c2 = mmo_get_byte (abfd); 1386 1387 /* A two-byte character. We can't grok this, but neither can 1388 mmotype, for other cases than the second byte being zero. */ 1389 1390 if (c != 0) 1391 { 1392 abfd->tdata.mmo_data->lop_stab_symbol 1393 [abfd->tdata.mmo_data->symbol_position] = 0; 1394 1395 (*_bfd_error_handler) 1396 (_("%s: unsupported wide character sequence" 1397 " 0x%02X 0x%02X after symbol name starting with `%s'\n"), 1398 bfd_get_filename (abfd), c, c2, 1399 abfd->tdata.mmo_data->lop_stab_symbol); 1400 bfd_set_error (bfd_error_bad_value); 1401 abfd->tdata.mmo_data->have_error = TRUE; 1402 return FALSE; 1403 } 1404 else 1405 c = c2; 1406 } 1407 1408 abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c; 1409 abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0; 1410 1411 if (j & MMO3_REGQUAL_BITS) 1412 { 1413 if (j == MMO3_REGQUAL_BITS) 1414 { 1415 sym_type = mmo_reg_sym; 1416 addr = mmo_get_byte (abfd); 1417 } 1418 else if (j <= 8) 1419 { 1420 unsigned int i; 1421 1422 for (i = 0; i < j; i++) 1423 addr = (addr << 8) + mmo_get_byte (abfd); 1424 1425 if (addr == 0 && j == MMO3_UNDEF) 1426 sym_type = mmo_undef_sym; 1427 else 1428 sym_type = mmo_abs_sym; 1429 } 1430 else 1431 { 1432 unsigned int i; 1433 1434 for (i = MMO3_DATA; i < j; i++) 1435 addr = (addr << 8) + mmo_get_byte (abfd); 1436 1437 addr += (bfd_vma) 0x20 << 56; 1438 sym_type = mmo_data_sym; 1439 } 1440 1441 /* Get the serial number. */ 1442 do 1443 { 1444 k = mmo_get_byte (abfd); 1445 serno = (serno << 7) + k; 1446 } 1447 while (k < 128); 1448 serno -= 128; 1449 1450 /* Got it. Now enter it. Skip a leading ":". */ 1451 if (! abfd->tdata.mmo_data->have_error 1452 && ! mmo_create_symbol (abfd, 1453 abfd->tdata.mmo_data->lop_stab_symbol 1454 + 1, 1455 addr, sym_type, serno)) 1456 abfd->tdata.mmo_data->have_error = TRUE; 1457 } 1458 1459 if (m & MMO3_MIDDLE) 1460 /* Traverse middle trie. */ 1461 mmo_get_symbols (abfd); 1462 1463 abfd->tdata.mmo_data->symbol_position--; 1464 } 1465 1466 if (m & MMO3_RIGHT) 1467 /* Traverse right trie. */ 1468 mmo_get_symbols (abfd); 1469 1470 return ! abfd->tdata.mmo_data->have_error; 1471 } 1472 1473 /* Get the location of memory area [VMA..VMA + SIZE - 1], which we think 1474 is in section SEC. Adjust and reallocate zero-initialized contents. 1475 If there's new contents, allocate to the next multiple of 1476 MMO_SEC_CONTENTS_CHUNK_SIZE. */ 1477 1478 static INLINE bfd_byte * 1479 mmo_get_loc (asection *sec, bfd_vma vma, int size) 1480 { 1481 bfd_size_type allocated_size; 1482 struct mmo_section_data_struct *sdatap = mmo_section_data (sec); 1483 struct mmo_data_list_struct *datap = sdatap->head; 1484 struct mmo_data_list_struct *entry; 1485 1486 /* First search the list to see if we have the requested chunk in one 1487 piece, or perhaps if we have a suitable chunk with room to fit. */ 1488 for (; datap != NULL; datap = datap->next) 1489 { 1490 if (datap->where <= vma 1491 && datap->where + datap->size >= vma + size) 1492 return datap->data + vma - datap->where; 1493 else if (datap->where <= vma 1494 && datap->where + datap->allocated_size >= vma + size 1495 /* Only munch on the "allocated size" if it does not 1496 overlap the next chunk. */ 1497 && (datap->next == NULL || datap->next->where >= vma + size)) 1498 { 1499 /* There was room allocated, but the size wasn't set to include 1500 it. Do that now. */ 1501 datap->size += (vma + size) - (datap->where + datap->size); 1502 1503 /* Update the section size. This happens only if we update the 1504 32-bit-aligned chunk size. Callers that have 1505 non-32-bit-aligned sections should do all allocation and 1506 size-setting by themselves or at least set the section size 1507 after the last allocating call to this function. */ 1508 if (vma + size > sec->vma + sec->size) 1509 sec->size += (vma + size) - (sec->vma + sec->size); 1510 1511 return datap->data + vma - datap->where; 1512 } 1513 } 1514 1515 /* Not found; allocate a new block. First check in case we get a 1516 request for a size split up over several blocks; we'll have to return 1517 NULL for those cases, requesting the caller to split up the request. 1518 Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and 1519 for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */ 1520 1521 for (datap = sdatap->head; datap != NULL; datap = datap->next) 1522 if ((datap->where <= vma && datap->where + datap->size > vma) 1523 || (datap->where < vma + size 1524 && datap->where + datap->size >= vma + size)) 1525 return NULL; 1526 1527 allocated_size 1528 = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1); 1529 entry = (mmo_data_list_type *) 1530 bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size); 1531 if (entry == NULL) 1532 return NULL; 1533 entry->where = vma; 1534 entry->size = size; 1535 entry->allocated_size = allocated_size; 1536 1537 datap = sdatap->head; 1538 1539 /* Sort the records by address. Optimize for the common case of adding 1540 a record to the end of the list. */ 1541 if (sdatap->tail != NULL && entry->where >= sdatap->tail->where) 1542 { 1543 sdatap->tail->next = entry; 1544 entry->next = NULL; 1545 sdatap->tail = entry; 1546 } 1547 else 1548 { 1549 mmo_data_list_type **look; 1550 for (look = &sdatap->head; 1551 *look != NULL && (*look)->where < entry->where; 1552 look = &(*look)->next) 1553 ; 1554 entry->next = *look; 1555 *look = entry; 1556 if (entry->next == NULL) 1557 { 1558 sdatap->tail = entry; 1559 1560 /* We get here for the first time (at other times too) for this 1561 section. Say we have contents. */ 1562 if (! bfd_set_section_flags (sec->owner, sec, 1563 bfd_get_section_flags (sec->owner, sec) 1564 | SEC_HAS_CONTENTS)) 1565 return NULL; 1566 } 1567 } 1568 1569 /* Update the section size. This happens only when we add contents and 1570 re-size as we go. The section size will then be aligned to 32 bits. */ 1571 if (vma + size > sec->vma + sec->size) 1572 sec->size += (vma + size) - (sec->vma + sec->size); 1573 return entry->data; 1574 } 1575 1576 /* Set sizes once we've read in all sections. */ 1577 1578 static void 1579 mmo_map_set_sizes (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, 1580 void *ignored ATTRIBUTE_UNUSED) 1581 { 1582 sec->lma = sec->vma; 1583 } 1584 1585 /* Read the mmo file and turn it into sections. */ 1586 1587 static bfd_boolean 1588 mmo_scan (bfd *abfd) 1589 { 1590 unsigned int i; 1591 unsigned int lineno = 1; 1592 bfd_boolean error = FALSE; 1593 bfd_vma vma = 0; 1594 asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); 1595 asection *non_spec_sec = NULL; 1596 bfd_vma non_spec_vma = 0; 1597 bfd_size_type nbytes_read = 0; 1598 /* Buffer with room to read a 64-bit value. */ 1599 bfd_byte buf[8]; 1600 long stab_loc = -1; 1601 char *file_names[256]; 1602 1603 abfd->symcount = 0; 1604 memset (file_names, 0, sizeof (file_names)); 1605 1606 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) 1607 goto error_return; 1608 1609 while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) 1610 { 1611 if (buf[0] == LOP) 1612 { 1613 unsigned int y = bfd_get_8 (abfd, buf + 2); 1614 unsigned int z = bfd_get_8 (abfd, buf + 3); 1615 1616 /* Change back to the original section for lopcodes other 1617 than LOP_QUOTE that comes after a LOP_SPEC. */ 1618 if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) 1619 && non_spec_sec != NULL) 1620 { 1621 sec = non_spec_sec; 1622 vma = non_spec_vma; 1623 non_spec_sec = NULL; 1624 } 1625 1626 switch (buf[1]) 1627 { 1628 default: 1629 (*_bfd_error_handler) 1630 (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), 1631 bfd_get_filename (abfd), buf[1]); 1632 bfd_set_error (bfd_error_bad_value); 1633 goto error_return; 1634 1635 case LOP_QUOTE: 1636 /* Quote the next 32-bit word. */ 1637 if (y != 0 || z != 1) 1638 { 1639 (*_bfd_error_handler) 1640 (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), 1641 bfd_get_filename (abfd), y*256+z); 1642 bfd_set_error (bfd_error_bad_value); 1643 goto error_return; 1644 } 1645 if (bfd_bread (buf, 4, abfd) != 4) 1646 goto error_return; 1647 1648 vma &= ~3; 1649 mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); 1650 vma += 4; 1651 lineno++; 1652 break; 1653 1654 case LOP_LOC: 1655 /* Set vma (and section). */ 1656 vma = (bfd_vma) y << 56; 1657 if (z == 1) 1658 { 1659 /* Get a 32-bit value. */ 1660 if (bfd_bread (buf, 4, abfd) != 4) 1661 goto error_return; 1662 1663 vma += bfd_get_32 (abfd, buf); 1664 } 1665 else if (z == 2) 1666 { 1667 /* Get a 64-bit value. */ 1668 if (bfd_bread (buf, 8, abfd) != 8) 1669 goto error_return; 1670 1671 vma += bfd_get_64 (abfd, buf); 1672 } 1673 else 1674 { 1675 (*_bfd_error_handler) 1676 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), 1677 bfd_get_filename (abfd), z); 1678 bfd_set_error (bfd_error_bad_value); 1679 goto error_return; 1680 } 1681 1682 /* When we decide which section the data goes into, we might 1683 create the section. If that happens, make sure the VMA at 1684 creation time is tetra-aligned. */ 1685 sec = mmo_decide_section (abfd, vma & ~3); 1686 if (sec == NULL) 1687 goto error_return; 1688 break; 1689 1690 case LOP_SKIP: 1691 /* Move forward within the same section. */ 1692 vma += y * 256 + z; 1693 1694 sec = mmo_decide_section (abfd, vma); 1695 if (sec == NULL) 1696 goto error_return; 1697 break; 1698 1699 case LOP_FIXO: 1700 /* A fixup: Store the current vma somewhere. Position using 1701 same format as LOP_LOC. */ 1702 { 1703 bfd_vma p = (bfd_vma) y << 56; 1704 asection *fixosec; 1705 1706 if (z == 1) 1707 { 1708 /* Get a 32-bit value. */ 1709 if (bfd_bread (buf, 4, abfd) != 4) 1710 goto error_return; 1711 1712 p += bfd_get_32 (abfd, buf); 1713 } 1714 else if (z == 2) 1715 { 1716 /* Get a 64-bit value. */ 1717 if (bfd_bread (buf, 8, abfd) != 8) 1718 goto error_return; 1719 1720 p += bfd_get_64 (abfd, buf); 1721 } 1722 else 1723 { 1724 (*_bfd_error_handler) 1725 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), 1726 bfd_get_filename (abfd), z); 1727 bfd_set_error (bfd_error_bad_value); 1728 goto error_return; 1729 } 1730 1731 /* The section where we store this address might be a 1732 different one than the current section. */ 1733 fixosec = mmo_decide_section (abfd, p); 1734 if (fixosec == NULL) 1735 goto error_return; 1736 mmo_xore_64 (fixosec, p, vma); 1737 } 1738 break; 1739 1740 case LOP_FIXR: 1741 /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ 1742 { 1743 unsigned int yz = (y * 256 + z); 1744 bfd_vma p = vma + 2 - 4 * yz; 1745 asection *fixrsec = mmo_decide_section (abfd, p); 1746 if (fixrsec == NULL) 1747 goto error_return; 1748 mmo_xore_16 (fixrsec, p, yz); 1749 } 1750 break; 1751 1752 case LOP_FIXRX: 1753 /* A fixup, similar to lop_fixr, but taking larger numbers 1754 and can change branches into the opposite direction 1755 (gasp!). */ 1756 { 1757 bfd_vma delta; 1758 bfd_vma p; 1759 asection *fixrsec; 1760 1761 if (y != 0) 1762 { 1763 (*_bfd_error_handler) 1764 (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), 1765 bfd_get_filename (abfd), y); 1766 bfd_set_error (bfd_error_bad_value); 1767 goto error_return; 1768 } 1769 1770 if (z != 16 && z != 24) 1771 { 1772 (*_bfd_error_handler) 1773 (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), 1774 bfd_get_filename (abfd), z); 1775 bfd_set_error (bfd_error_bad_value); 1776 goto error_return; 1777 } 1778 1779 /* Get the next 32-bit value. */ 1780 if (bfd_bread (buf, 4, abfd) != 4) 1781 goto error_return; 1782 1783 delta = bfd_get_32 (abfd, buf); 1784 1785 /* Do an, ehm, involved calculation for the location of 1786 the fixup. See mmixal documentation for a verbose 1787 explanation. We follow it verbosely here for the 1788 readers delight. */ 1789 if (buf[0] == 0) 1790 p = vma - 4 * delta; 1791 else if (buf[0] == 1) 1792 p = vma - 4 * ((delta & 0xffffff) - (1 << z)); 1793 else 1794 { 1795 (*_bfd_error_handler) 1796 (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), 1797 bfd_get_filename (abfd), buf[0]); 1798 bfd_set_error (bfd_error_bad_value); 1799 goto error_return; 1800 } 1801 1802 fixrsec = mmo_decide_section (abfd, vma); 1803 if (fixrsec == NULL) 1804 goto error_return; 1805 mmo_xore_32 (fixrsec, p, delta); 1806 } 1807 break; 1808 1809 case LOP_FILE: 1810 /* Set current file and perhaps the file name. Reset line 1811 number. */ 1812 if (z != 0) 1813 { 1814 char *fname = bfd_malloc (z * 4 + 1); 1815 1816 if (fname == NULL) 1817 { 1818 (*_bfd_error_handler) 1819 (_("%s: cannot allocate file name for file number %d, %d bytes\n"), 1820 bfd_get_filename (abfd), y, z * 4 + 1); 1821 bfd_set_error (bfd_error_system_call); 1822 goto error_return; 1823 } 1824 1825 fname[z * 4] = 0; 1826 1827 for (i = 0; i < z; i++) 1828 { 1829 if (bfd_bread (fname + i * 4, 4, abfd) != 4) 1830 { 1831 free (fname); 1832 goto error_return; 1833 } 1834 } 1835 1836 if (file_names[y] != NULL) 1837 { 1838 (*_bfd_error_handler) 1839 (_("%s: invalid mmo file: file number %d `%s'," 1840 " was already entered as `%s'\n"), 1841 bfd_get_filename (abfd), y, fname, file_names[y]); 1842 bfd_set_error (bfd_error_bad_value); 1843 goto error_return; 1844 } 1845 1846 file_names[y] = fname; 1847 } 1848 1849 if (file_names[y] == NULL) 1850 { 1851 (*_bfd_error_handler) 1852 (_("%s: invalid mmo file: file name for number %d" 1853 " was not specified before use\n"), 1854 bfd_get_filename (abfd), y); 1855 bfd_set_error (bfd_error_bad_value); 1856 goto error_return; 1857 } 1858 1859 lineno = 0; 1860 break; 1861 1862 case LOP_LINE: 1863 /* Set line number. */ 1864 lineno = y * 256 + z; 1865 /* FIXME: Create a sequence of mmo-specific line number 1866 entries for each section, then translate into canonical 1867 format. */ 1868 break; 1869 1870 case LOP_SPEC: 1871 /* Special data follows until the next non-lop_quote 1872 lopcode. */ 1873 non_spec_sec = sec; 1874 non_spec_vma = vma; 1875 sec = mmo_get_spec_section (abfd, y * 256 + z); 1876 if (sec == NULL) 1877 goto error_return; 1878 1879 vma = sec->vma; 1880 break; 1881 1882 case LOP_PRE: 1883 { 1884 /* We ignore header information, except we read in the 1885 creation time from the first 32-bit word with the time 1886 in seconds since era. */ 1887 if (z >= 1 1888 && bfd_bread (abfd->tdata.mmo_data->created, 4, 1889 abfd) != 4) 1890 goto error_return; 1891 1892 for (i = 1; i < z; i++) 1893 if (bfd_bread (buf, 4, abfd) != 4) 1894 goto error_return; 1895 } 1896 break; 1897 1898 case LOP_POST: 1899 /* This tells of the contents of registers $Z..$255 at 1900 startup. We make a section out of it, with VMA = Z * 8, 1901 but only if Z != 255 or the contents is non-zero. */ 1902 { 1903 asection *rsec; 1904 bfd_byte *loc; 1905 bfd_vma first_octa; 1906 bfd_vma startaddr_octa; 1907 1908 /* Read first octaword outside loop to simplify logic when 1909 excluding the Z == 255, octa == 0 case. */ 1910 if (bfd_bread (buf, 8, abfd) != 8) 1911 goto error_return; 1912 1913 first_octa = bfd_get_64 (abfd, buf); 1914 1915 /* Don't emit contents for the trivial case which is 1916 always present; $255 pointing to Main. */ 1917 if (z != 255) 1918 { 1919 rsec 1920 = bfd_make_section_old_way (abfd, 1921 MMIX_REG_CONTENTS_SECTION_NAME); 1922 rsec->flags |= SEC_LINKER_CREATED; 1923 rsec->vma = z * 8; 1924 loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); 1925 bfd_put_64 (abfd, first_octa, loc); 1926 1927 for (i = z + 1; i < 255; i++) 1928 { 1929 if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) 1930 goto error_return; 1931 } 1932 1933 /* Read out the last octabyte, and use it to set the 1934 start address. */ 1935 if (bfd_bread (buf, 8, abfd) != 8) 1936 goto error_return; 1937 1938 startaddr_octa = bfd_get_64 (abfd, buf); 1939 } 1940 else 1941 startaddr_octa = first_octa; 1942 1943 if (! bfd_set_start_address (abfd, startaddr_octa)) 1944 { 1945 /* Currently this can't fail, but this should handle 1946 future failures. */ 1947 bfd_set_error (bfd_error_bad_value); 1948 goto error_return; 1949 } 1950 } 1951 break; 1952 1953 case LOP_STAB: 1954 /* We read in the symbols now, not later. */ 1955 if (y != 0 || z != 0) 1956 { 1957 (*_bfd_error_handler) 1958 (_("%s: invalid mmo file: fields y and z of lop_stab" 1959 " non-zero, y: %d, z: %d\n"), 1960 bfd_get_filename (abfd), y, z); 1961 bfd_set_error (bfd_error_bad_value); 1962 goto error_return; 1963 } 1964 1965 /* Save the location, so we can check that YZ in the LOP_END 1966 is correct. */ 1967 stab_loc = bfd_tell (abfd); 1968 1969 /* It's not said that an MMO can be without symbols (though 1970 mmixal will refuse to assemble files without Main), but 1971 it seems it would still be a valid mmo-file, so allow it. 1972 We detect the absence of a symbol area in that the upper 1973 limit is computed (from the lop_end YZ field) as 0. 1974 Don't call mmo_get_symbols; it can only detect the end of 1975 a valid symbol trie, not the absence of one. */ 1976 if (abfd->tdata.mmo_data->max_symbol_length != 0 1977 && ! mmo_get_symbols (abfd)) 1978 goto error_return; 1979 break; 1980 1981 case LOP_END: 1982 { 1983 /* This must be the last 32-bit word in an mmo file. 1984 Let's find out. */ 1985 struct stat statbuf; 1986 file_ptr curpos = bfd_tell (abfd); 1987 1988 if (bfd_stat (abfd, &statbuf) < 0) 1989 goto error_return; 1990 1991 if (statbuf.st_size != curpos) 1992 { 1993 (*_bfd_error_handler) 1994 (_("%s: invalid mmo file: lop_end not last item in" 1995 " file\n"), 1996 bfd_get_filename (abfd)); 1997 bfd_set_error (bfd_error_bad_value); 1998 goto error_return; 1999 } 2000 2001 /* Check that the YZ field is right. Subtract the size of 2002 this LOP_END in the calculation; YZ does not include 2003 it. */ 2004 if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) 2005 { 2006 (*_bfd_error_handler) 2007 (_("%s: invalid mmo file: YZ of lop_end (%ld)" 2008 " not equal to the number of tetras to the preceding" 2009 " lop_stab (%ld)\n"), 2010 bfd_get_filename (abfd), (long) (y * 256 + z), 2011 (curpos - stab_loc - 4)/4); 2012 bfd_set_error (bfd_error_bad_value); 2013 goto error_return; 2014 } 2015 2016 bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); 2017 goto done; 2018 } 2019 } 2020 } 2021 else 2022 { 2023 /* This wasn't a lopcode, so store it in the current section. */ 2024 mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); 2025 vma += 4; 2026 vma &= ~3; 2027 lineno++; 2028 } 2029 } 2030 2031 /* We know this file is a multiple of four bytes (checked in 2032 mmo_object_p), so if we got something other than 0, this was a bad 2033 file (although it's more likely we'll get 0 in that case too). 2034 If we got end-of-file, then there was no lop_stab, so the file has 2035 invalid format. */ 2036 2037 if (nbytes_read != 0) 2038 bfd_set_error (bfd_error_system_call); 2039 else 2040 bfd_set_error (bfd_error_bad_value); 2041 2042 error_return: 2043 error = TRUE; 2044 done: 2045 /* Mark the .text and .data section with their normal attribute if they 2046 contain anything. This is not redundant wrt. mmo_decide_section, 2047 since that code might never execute, and conversely the alloc+code 2048 section flags must be set then. */ 2049 sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 2050 if (sec != NULL 2051 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 2052 && ! bfd_set_section_flags (abfd, sec, 2053 bfd_get_section_flags (abfd, sec) 2054 | SEC_ALLOC | SEC_LOAD | SEC_CODE)) 2055 error = TRUE; 2056 2057 sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 2058 if (sec != NULL 2059 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 2060 && ! bfd_set_section_flags (abfd, sec, 2061 bfd_get_section_flags (abfd, sec) 2062 | SEC_ALLOC | SEC_LOAD)) 2063 error = TRUE; 2064 2065 /* Free whatever resources we took. */ 2066 for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) 2067 if (file_names[i]) 2068 free (file_names[i]); 2069 return ! error; 2070 } 2071 2072 /* A hook to set up object file dependent section information. For mmo, 2073 we point out the shape of allocated section contents. */ 2074 2075 static bfd_boolean 2076 mmo_new_section_hook (bfd *abfd, asection *newsect) 2077 { 2078 if (!newsect->used_by_bfd) 2079 { 2080 /* We zero-fill all fields and assume NULL is represented by an all 2081 zero-bit pattern. */ 2082 newsect->used_by_bfd 2083 = bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); 2084 if (!newsect->used_by_bfd) 2085 return FALSE; 2086 } 2087 2088 /* Always align to at least 32-bit words. */ 2089 newsect->alignment_power = 2; 2090 return _bfd_generic_new_section_hook (abfd, newsect); 2091 } 2092 2093 /* We already have section contents loaded for sections that have 2094 contents. */ 2095 2096 static bfd_boolean 2097 mmo_get_section_contents (bfd *abfd ATTRIBUTE_UNUSED, 2098 asection *sec, 2099 void * location, 2100 file_ptr offset, 2101 bfd_size_type bytes_to_do) 2102 { 2103 /* Iterate over diminishing chunk sizes, copying contents, like 2104 mmo_set_section_contents. */ 2105 while (bytes_to_do) 2106 { 2107 /* A minor song-and-dance to make sure we're not bitten by the 2108 distant possibility of the cast from bfd_vma to int making the 2109 chunk zero-sized. */ 2110 int chunk_size 2111 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; 2112 bfd_byte *loc; 2113 2114 do 2115 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); 2116 while (loc == NULL && (chunk_size /= 2) != 0); 2117 2118 if (chunk_size == 0) 2119 return FALSE; 2120 2121 memcpy (location, loc, chunk_size); 2122 2123 location = (bfd_byte *) location + chunk_size; 2124 bytes_to_do -= chunk_size; 2125 offset += chunk_size; 2126 } 2127 return TRUE; 2128 } 2129 2130 /* Return the amount of memory needed to read the symbol table. */ 2131 2132 static long 2133 mmo_get_symtab_upper_bound (bfd *abfd) 2134 { 2135 return (abfd->symcount + 1) * sizeof (asymbol *); 2136 } 2137 2138 /* Sort mmo symbols by serial number. */ 2139 2140 static int 2141 mmo_sort_mmo_symbols (const void *arg1, const void *arg2) 2142 { 2143 const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1; 2144 const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2; 2145 2146 /* Sort by serial number first. */ 2147 if (sym1->serno < sym2->serno) 2148 return -1; 2149 else if (sym1->serno > sym2->serno) 2150 return 1; 2151 2152 /* Then sort by address of the table entries. */ 2153 return ((const char *) arg1 - (const char *) arg2); 2154 } 2155 2156 /* Translate the symbol table. */ 2157 2158 static long 2159 mmo_canonicalize_symtab (bfd *abfd, asymbol **alocation) 2160 { 2161 unsigned int symcount = bfd_get_symcount (abfd); 2162 asymbol *csymbols; 2163 unsigned int i; 2164 2165 csymbols = abfd->tdata.mmo_data->csymbols; 2166 if (csymbols == NULL && symcount != 0) 2167 { 2168 asymbol *c; 2169 struct mmo_symbol *s; 2170 struct mmo_symbol **msp; 2171 2172 /* First we store the symbols into the table we'll return, then we 2173 qsort it on the serial number, with secondary on the address of 2174 the symbol, to preserve order if there would be non-unique serial 2175 numbers. */ 2176 for (s = abfd->tdata.mmo_data->symbols, 2177 msp = (struct mmo_symbol **) alocation; 2178 s != NULL; 2179 s = s->next, ++msp) 2180 *msp = s; 2181 2182 *msp = NULL; 2183 2184 qsort (alocation, symcount, sizeof (struct mmo_symbol *), 2185 mmo_sort_mmo_symbols); 2186 2187 csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); 2188 if (csymbols == NULL) 2189 return -1; 2190 abfd->tdata.mmo_data->csymbols = csymbols; 2191 2192 for (msp = (struct mmo_symbol **) alocation, c = csymbols; 2193 *msp != NULL; 2194 msp++, ++c) 2195 { 2196 s = *msp; 2197 c->the_bfd = abfd; 2198 c->name = s->name; 2199 c->value = s->value; 2200 c->flags = BSF_GLOBAL; 2201 2202 if (s->sym_type == mmo_data_sym) 2203 { 2204 c->section 2205 = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 2206 2207 if (c->section == NULL) 2208 c->section = bfd_abs_section_ptr; 2209 else 2210 c->value -= c->section->vma; 2211 } 2212 else if (s->sym_type == mmo_undef_sym) 2213 c->section = bfd_und_section_ptr; 2214 else if (s->sym_type == mmo_reg_sym) 2215 { 2216 c->section 2217 = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); 2218 c->section->flags |= SEC_LINKER_CREATED; 2219 } 2220 else 2221 { 2222 asection *textsec 2223 = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 2224 asection *datasec; 2225 2226 if (textsec != NULL 2227 && c->value >= textsec->vma 2228 && c->value <= textsec->vma + textsec->size) 2229 { 2230 c->section = textsec; 2231 c->value -= c->section->vma; 2232 } 2233 /* In mmo, symbol types depend on the VMA. Therefore, if 2234 the data section isn't within the usual bounds, its 2235 symbols are marked as absolute. Correct that. This 2236 means we can't have absolute symbols with values matching 2237 data section addresses, but we also can't have with 2238 absolute symbols with values matching text section 2239 addresses. For such needs, use the ELF format. */ 2240 else if ((datasec 2241 = bfd_get_section_by_name (abfd, 2242 MMO_DATA_SECTION_NAME)) 2243 != NULL 2244 && c->value >= datasec->vma 2245 && c->value <= datasec->vma + datasec->size) 2246 { 2247 c->section = datasec; 2248 c->value -= c->section->vma; 2249 } 2250 else 2251 c->section = bfd_abs_section_ptr; 2252 } 2253 2254 c->udata.p = NULL; 2255 } 2256 } 2257 2258 /* Last, overwrite the incoming table with the right-type entries. */ 2259 for (i = 0; i < symcount; i++) 2260 *alocation++ = csymbols++; 2261 *alocation = NULL; 2262 2263 return symcount; 2264 } 2265 2266 /* Get information about a symbol. */ 2267 2268 static void 2269 mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2270 asymbol *symbol, symbol_info *ret) 2271 { 2272 bfd_symbol_info (symbol, ret); 2273 } 2274 2275 static void 2276 mmo_print_symbol (bfd *abfd, void *afile, asymbol *symbol, 2277 bfd_print_symbol_type how) 2278 { 2279 FILE *file = (FILE *) afile; 2280 2281 switch (how) 2282 { 2283 case bfd_print_symbol_name: 2284 fprintf (file, "%s", symbol->name); 2285 break; 2286 default: 2287 bfd_print_symbol_vandf (abfd, file, symbol); 2288 2289 fprintf (file, " %-5s %s", 2290 symbol->section->name, 2291 symbol->name); 2292 } 2293 } 2294 2295 /* We can't map a file directly into executable code, so the 2296 size of header information is irrelevant. */ 2297 2298 static int 2299 mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, 2300 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2301 { 2302 return 0; 2303 } 2304 2305 /* Write the (section-neutral) file preamble. */ 2306 2307 static bfd_boolean 2308 mmo_internal_write_header (bfd *abfd) 2309 { 2310 const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; 2311 2312 if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) 2313 return FALSE; 2314 2315 /* Copy creation time of original file. */ 2316 if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) 2317 return FALSE; 2318 2319 return TRUE; 2320 } 2321 2322 /* Write the LOP_POST record, with global register initializations. 2323 Z is the Z field of the LOP_POST, corresponding to 255 - number of 2324 registers at DATA. The Z = 255 field is filled in with the 2325 start-address. */ 2326 2327 static bfd_boolean 2328 mmo_internal_write_post (bfd *abfd, int z, asection *sec) 2329 { 2330 int i; 2331 bfd_byte buf[8]; 2332 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); 2333 2334 for (i = z; i < 255; i++) 2335 { 2336 bfd_byte *data = mmo_get_loc (sec, i * 8, 8); 2337 2338 if (bfd_bwrite (data, 8, abfd) != 8) 2339 return FALSE; 2340 } 2341 2342 /* For Z == $255, we always emit the start location; supposedly Main, 2343 but we have it handy at bfd_get_start_address. If we're called with 2344 Z == 255, don't assume DATA is valid. */ 2345 bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); 2346 2347 return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8; 2348 } 2349 2350 /* Translate to and from BFD flags. This is to make sure that we don't 2351 get bitten by BFD flag number changes. */ 2352 2353 static flagword 2354 mmo_sec_flags_from_bfd_flags (flagword flags) 2355 { 2356 flagword oflags = 0; 2357 2358 if (flags & SEC_ALLOC) 2359 oflags |= MMO_SEC_ALLOC; 2360 if (flags & SEC_LOAD) 2361 oflags |= MMO_SEC_LOAD; 2362 if (flags & SEC_RELOC) 2363 oflags |= MMO_SEC_RELOC; 2364 if (flags & SEC_READONLY) 2365 oflags |= MMO_SEC_READONLY; 2366 if (flags & SEC_CODE) 2367 oflags |= MMO_SEC_CODE; 2368 if (flags & SEC_DATA) 2369 oflags |= MMO_SEC_DATA; 2370 if (flags & SEC_NEVER_LOAD) 2371 oflags |= MMO_SEC_NEVER_LOAD; 2372 if (flags & SEC_IS_COMMON) 2373 oflags |= MMO_SEC_IS_COMMON; 2374 if (flags & SEC_DEBUGGING) 2375 oflags |= MMO_SEC_DEBUGGING; 2376 2377 return oflags; 2378 } 2379 2380 static flagword 2381 bfd_sec_flags_from_mmo_flags (flagword flags) 2382 { 2383 flagword oflags = 0; 2384 2385 if (flags & MMO_SEC_ALLOC) 2386 oflags |= SEC_ALLOC; 2387 if (flags & MMO_SEC_LOAD) 2388 oflags |= SEC_LOAD; 2389 if (flags & MMO_SEC_RELOC) 2390 oflags |= SEC_RELOC; 2391 if (flags & MMO_SEC_READONLY) 2392 oflags |= SEC_READONLY; 2393 if (flags & MMO_SEC_CODE) 2394 oflags |= SEC_CODE; 2395 if (flags & MMO_SEC_DATA) 2396 oflags |= SEC_DATA; 2397 if (flags & MMO_SEC_NEVER_LOAD) 2398 oflags |= SEC_NEVER_LOAD; 2399 if (flags & MMO_SEC_IS_COMMON) 2400 oflags |= SEC_IS_COMMON; 2401 if (flags & MMO_SEC_DEBUGGING) 2402 oflags |= SEC_DEBUGGING; 2403 2404 return oflags; 2405 } 2406 2407 /* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and 2408 is 0. */ 2409 2410 static bfd_boolean 2411 mmo_has_leading_or_trailing_zero_tetra_p (bfd *abfd, asection *sec) 2412 { 2413 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2414 2415 if (sec->size < 4) 2416 return FALSE; 2417 2418 if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 2419 && bfd_get_32 (abfd, 2420 mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) 2421 return TRUE; 2422 2423 return FALSE; 2424 } 2425 2426 /* Write a section. */ 2427 2428 static bfd_boolean 2429 mmo_internal_write_section (bfd *abfd, asection *sec) 2430 { 2431 /* We do it differently depending on what section this is: 2432 2433 ".text": Output, prepended by information about the first source file 2434 (not yet implemented.) 2435 2436 ".data": Output. 2437 2438 (".MMIX.reg_contents": Not handled here.) 2439 2440 Anything else: Output inside a lop_spec 80, in the format described 2441 above. */ 2442 2443 if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) 2444 { 2445 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2446 2447 /* Because leading and trailing zeros are omitted in output, we need to 2448 specify the section boundaries so they're correct when the file 2449 is read in again. That's also the case if this section is 2450 specified as not within its usual boundaries or alignments. */ 2451 if (sec->size != 0 2452 && (secaddr + sec->size >= (bfd_vma) 1 << 56 2453 || (secaddr & 3) != 0 2454 || (sec->size & 3) != 0 2455 || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) 2456 { 2457 if (!mmo_write_section_description (abfd, sec)) 2458 return FALSE; 2459 } 2460 2461 /* FIXME: Output source file name and line number. */ 2462 return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); 2463 } 2464 else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) 2465 { 2466 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2467 2468 /* Same goes as for MMO_TEXT_SECTION_NAME above. */ 2469 if (sec->size != 0 2470 && (secaddr < (bfd_vma) 0x20 << 56 2471 || secaddr + sec->size >= (bfd_vma) 0x21 << 56 2472 || (secaddr & 3) != 0 2473 || (sec->size & 3) != 0 2474 || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) 2475 { 2476 if (!mmo_write_section_description (abfd, sec)) 2477 return FALSE; 2478 } 2479 2480 return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); 2481 } 2482 else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 2483 /* Not handled here. */ 2484 { 2485 /* This would normally be an abort call since this can't happen, but 2486 we don't do that. */ 2487 bfd_set_error (bfd_error_bad_value); 2488 return FALSE; 2489 } 2490 else if (CONST_STRNEQ (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX)) 2491 { 2492 int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); 2493 2494 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); 2495 return (! abfd->tdata.mmo_data->have_error 2496 && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); 2497 } 2498 /* Ignore sections that are just allocated or empty; we write out 2499 _contents_ here. */ 2500 else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 2501 && sec->size != 0) 2502 { 2503 if (!mmo_write_section_description (abfd, sec)) 2504 return FALSE; 2505 2506 /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually 2507 loaded. */ 2508 if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) 2509 return (! abfd->tdata.mmo_data->have_error 2510 && mmo_write_loc_chunk_list (abfd, 2511 mmo_section_data (sec)->head)); 2512 return (! abfd->tdata.mmo_data->have_error 2513 && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); 2514 } 2515 2516 /* Some section without contents. */ 2517 return TRUE; 2518 } 2519 2520 /* Write the description of a section, extended-mmo-style. */ 2521 2522 static bfd_boolean 2523 mmo_write_section_description (bfd *abfd, asection *sec) 2524 { 2525 /* Keep the following document-comment formatted the way it is. */ 2526 /* 2527 INODE 2528 mmo section mapping, , Symbol-table, mmo 2529 SUBSECTION 2530 mmo section mapping 2531 2532 The implementation in BFD uses special data type 80 (decimal) to 2533 encapsulate and describe named sections, containing e.g.@: debug 2534 information. If needed, any datum in the encapsulation will be 2535 quoted using lop_quote. First comes a 32-bit word holding the 2536 number of 32-bit words containing the zero-terminated zero-padded 2537 segment name. After the name there's a 32-bit word holding flags 2538 describing the section type. Then comes a 64-bit big-endian word 2539 with the section length (in bytes), then another with the section 2540 start address. Depending on the type of section, the contents 2541 might follow, zero-padded to 32-bit boundary. For a loadable 2542 section (such as data or code), the contents might follow at some 2543 later point, not necessarily immediately, as a lop_loc with the 2544 same start address as in the section description, followed by the 2545 contents. This in effect forms a descriptor that must be emitted 2546 before the actual contents. Sections described this way must not 2547 overlap. 2548 2549 For areas that don't have such descriptors, synthetic sections are 2550 formed by BFD. Consecutive contents in the two memory areas 2551 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and 2552 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in 2553 sections named <<.text>> and <<.data>> respectively. If an area 2554 is not otherwise described, but would together with a neighboring 2555 lower area be less than @samp{0x40000000} bytes long, it is joined 2556 with the lower area and the gap is zero-filled. For other cases, 2557 a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, 2558 @var{n} is a number, a running count through the mmo file, 2559 starting at 0. 2560 2561 EXAMPLE 2562 A loadable section specified as: 2563 2564 | .section secname,"ax" 2565 | TETRA 1,2,3,4,-1,-2009 2566 | BYTE 80 2567 2568 and linked to address @samp{0x4}, is represented by the sequence: 2569 2570 | 0x98080050 - lop_spec 80 2571 | 0x00000002 - two 32-bit words for the section name 2572 | 0x7365636e - "secn" 2573 | 0x616d6500 - "ame\0" 2574 | 0x00000033 - flags CODE, READONLY, LOAD, ALLOC 2575 | 0x00000000 - high 32 bits of section length 2576 | 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits 2577 | 0x00000000 - high 32 bits of section address 2578 | 0x00000004 - section address is 4 2579 | 0x98010002 - 64 bits with address of following data 2580 | 0x00000000 - high 32 bits of address 2581 | 0x00000004 - low 32 bits: data starts at address 4 2582 | 0x00000001 - 1 2583 | 0x00000002 - 2 2584 | 0x00000003 - 3 2585 | 0x00000004 - 4 2586 | 0xffffffff - -1 2587 | 0xfffff827 - -2009 2588 | 0x50000000 - 80 as a byte, padded with zeros. 2589 2590 Note that the lop_spec wrapping does not include the section 2591 contents. Compare this to a non-loaded section specified as: 2592 2593 | .section thirdsec 2594 | TETRA 200001,100002 2595 | BYTE 38,40 2596 2597 This, when linked to address @samp{0x200000000000001c}, is 2598 represented by: 2599 2600 | 0x98080050 - lop_spec 80 2601 | 0x00000002 - two 32-bit words for the section name 2602 | 0x7365636e - "thir" 2603 | 0x616d6500 - "dsec" 2604 | 0x00000010 - flag READONLY 2605 | 0x00000000 - high 32 bits of section length 2606 | 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits 2607 | 0x20000000 - high 32 bits of address 2608 | 0x0000001c - low 32 bits of address 0x200000000000001c 2609 | 0x00030d41 - 200001 2610 | 0x000186a2 - 100002 2611 | 0x26280000 - 38, 40 as bytes, padded with zeros 2612 2613 For the latter example, the section contents must not be 2614 loaded in memory, and is therefore specified as part of the 2615 special data. The address is usually unimportant but might 2616 provide information for e.g.@: the DWARF 2 debugging format. */ 2617 2618 mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); 2619 mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); 2620 mmo_write_chunk (abfd, (bfd_byte *) sec->name, strlen (sec->name)); 2621 mmo_flush_chunk (abfd); 2622 /* FIXME: We can get debug sections (.debug_line & Co.) with a section 2623 flag still having SEC_RELOC set. Investigate. This might be true 2624 for all alien sections; perhaps mmo.em should clear that flag. Might 2625 be related to weak references. */ 2626 mmo_write_tetra (abfd, 2627 mmo_sec_flags_from_bfd_flags 2628 (bfd_get_section_flags (abfd, sec))); 2629 mmo_write_octa (abfd, sec->size); 2630 mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); 2631 return TRUE; 2632 } 2633 2634 /* We save up all data before output. */ 2635 2636 static bfd_boolean 2637 mmo_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED, sec_ptr sec, 2638 const void *location, file_ptr offset, 2639 bfd_size_type bytes_to_do) 2640 { 2641 /* Iterate over diminishing chunk sizes, copying contents. */ 2642 while (bytes_to_do) 2643 { 2644 /* A minor song-and-dance to make sure we're not bitten by the 2645 distant possibility of the cast from bfd_vma to int making the 2646 chunk zero-sized. */ 2647 int chunk_size 2648 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; 2649 bfd_byte *loc; 2650 2651 do 2652 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); 2653 while (loc == NULL && (chunk_size /= 2) != 0); 2654 2655 if (chunk_size == 0) 2656 return FALSE; 2657 2658 memcpy (loc, location, chunk_size); 2659 2660 location = (bfd_byte *) location + chunk_size; 2661 bytes_to_do -= chunk_size; 2662 offset += chunk_size; 2663 } 2664 return TRUE; 2665 } 2666 2667 /* Add a symbol to a trie-tree. */ 2668 2669 static bfd_boolean 2670 mmo_internal_add_3_sym (bfd *abfd, struct mmo_symbol_trie *rootp, 2671 const struct mmo_symbol *symp) 2672 { 2673 const char *name = symp->name; 2674 struct mmo_symbol_trie *trie = rootp; 2675 struct mmo_symbol_trie **triep = NULL; 2676 2677 while (*name && trie != NULL) 2678 { 2679 if (*name < trie->symchar) 2680 { 2681 triep = &trie->left; 2682 trie = trie->left; 2683 } 2684 else if (*name > trie->symchar) 2685 { 2686 triep = &trie->right; 2687 trie = trie->right; 2688 } 2689 else if (*name == trie->symchar) 2690 { 2691 triep = &trie->middle; 2692 name++; 2693 2694 /* Make sure "trie" points to where we should fill in the 2695 current symbol whenever we've iterated through "name". We 2696 would lose the right position if we encounter "foobar" then 2697 "foo". */ 2698 if (*name) 2699 trie = trie->middle; 2700 } 2701 } 2702 2703 while (*name != 0) 2704 { 2705 /* Create middle branches for the rest of the characters. */ 2706 trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); 2707 *triep = trie; 2708 trie->symchar = *name++; 2709 triep = &trie->middle; 2710 } 2711 2712 /* We discover a duplicate symbol rather late in the process, but still; 2713 we discover it and bail out. */ 2714 if (trie->sym.name != NULL) 2715 { 2716 (*_bfd_error_handler) 2717 (_("%s: invalid symbol table: duplicate symbol `%s'\n"), 2718 bfd_get_filename (abfd), trie->sym.name); 2719 bfd_set_error (bfd_error_bad_value); 2720 return FALSE; 2721 } 2722 2723 memcpy (&trie->sym, symp, sizeof *symp); 2724 return TRUE; 2725 } 2726 2727 /* Find out the length of the serialized version of a trie in bytes. */ 2728 2729 static unsigned int 2730 mmo_internal_3_length (bfd *abfd, struct mmo_symbol_trie *trie) 2731 { 2732 /* First, one for the control byte. */ 2733 unsigned int length = 1; 2734 2735 if (trie == NULL) 2736 return 0; 2737 2738 /* Add in the recursion to the left. */ 2739 length += mmo_internal_3_length (abfd, trie->left); 2740 2741 /* Add in the middle trie and the character. */ 2742 length += 1 + mmo_internal_3_length (abfd, trie->middle); 2743 2744 /* Add in the recursion to the right. */ 2745 length += mmo_internal_3_length (abfd, trie->right); 2746 2747 /* Add in bytes for the symbol (if this is an endnode). */ 2748 if (trie->sym.name != NULL) 2749 { 2750 unsigned int serno = trie->sym.serno; 2751 2752 /* First what it takes to encode the value. */ 2753 if (trie->sym.sym_type == mmo_reg_sym) 2754 length++; 2755 else if (trie->sym.sym_type == mmo_undef_sym) 2756 length += 2; 2757 else 2758 { 2759 bfd_vma value = trie->sym.value; 2760 2761 /* Coded in one to eight following bytes. */ 2762 if (trie->sym.sym_type == mmo_data_sym) 2763 value -= (bfd_vma) 0x20 << 56; 2764 2765 do 2766 { 2767 value >>= 8; 2768 length++; 2769 } 2770 while (value != 0); 2771 } 2772 2773 /* Find out what it takes to encode the serial number. */ 2774 do 2775 { 2776 serno >>= 7; 2777 length++; 2778 } 2779 while (serno != 0); 2780 } 2781 2782 return length; 2783 } 2784 2785 /* Helper function for outputting the serial number of a symbol, output as 2786 a variant of leb128 (see dwarf2 documentation) which could be called 2787 beb128. Using a helper function and recursion simplifies debugging. */ 2788 2789 static void 2790 mmo_beb128_out (bfd *abfd, int serno, int marker) 2791 { 2792 if (serno & ~0x7f) 2793 mmo_beb128_out (abfd, serno >> 7, 0); 2794 mmo_write_byte (abfd, marker | (serno & 0x7f)); 2795 } 2796 2797 /* Serialize a trie. */ 2798 2799 static void 2800 mmo_internal_3_dump (bfd *abfd, struct mmo_symbol_trie *trie) 2801 { 2802 bfd_byte control = 0; 2803 2804 if (trie == NULL) 2805 return; 2806 2807 if (trie->left) 2808 control |= MMO3_LEFT; 2809 2810 if (trie->middle) 2811 control |= MMO3_MIDDLE; 2812 2813 if (trie->right) 2814 control |= MMO3_RIGHT; 2815 2816 if (trie->sym.name != NULL) 2817 { 2818 /* Encode the symbol type and length of value bytes. */ 2819 if (trie->sym.sym_type == mmo_reg_sym) 2820 control |= MMO3_REGQUAL_BITS; 2821 else if (trie->sym.sym_type == mmo_undef_sym) 2822 control |= MMO3_UNDEF; 2823 else 2824 { 2825 bfd_vma value = trie->sym.value; 2826 2827 /* Coded in 1..8 following bytes. */ 2828 if (trie->sym.sym_type == mmo_data_sym) 2829 { 2830 control |= MMO3_DATA; 2831 value -= (bfd_vma) 0x20 << 56; 2832 } 2833 2834 do 2835 { 2836 value >>= 8; 2837 control++; 2838 } 2839 while (value != 0); 2840 } 2841 } 2842 2843 /* The control byte is output before recursing. */ 2844 mmo_write_byte (abfd, control); 2845 2846 mmo_internal_3_dump (abfd, trie->left); 2847 2848 if (control & MMO3_SYMBITS) 2849 { 2850 mmo_write_byte (abfd, trie->symchar); 2851 2852 if (trie->sym.name != NULL) 2853 { 2854 if (trie->sym.sym_type == mmo_reg_sym) 2855 mmo_write_byte (abfd, trie->sym.value); 2856 else if (trie->sym.sym_type == mmo_undef_sym) 2857 { 2858 mmo_write_byte (abfd, 0); 2859 mmo_write_byte (abfd, 0); 2860 } 2861 else 2862 { 2863 bfd_vma value = trie->sym.value; 2864 2865 bfd_byte byte_n = control & 15; 2866 2867 /* Coded in 1..8 following bytes. Note that the value is 2868 shifted out big-endian. */ 2869 if (trie->sym.sym_type == mmo_data_sym) 2870 { 2871 value -= (bfd_vma) 0x20 << 56; 2872 byte_n -= 8; 2873 } 2874 2875 do 2876 { 2877 mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); 2878 byte_n--; 2879 } 2880 while (byte_n != 0); 2881 } 2882 2883 mmo_beb128_out (abfd, trie->sym.serno, 128); 2884 } 2885 mmo_internal_3_dump (abfd, trie->middle); 2886 } 2887 mmo_internal_3_dump (abfd, trie->right); 2888 } 2889 2890 /* Write symbols in mmo format. Also write the lop_end terminator. */ 2891 2892 static bfd_boolean 2893 mmo_write_symbols_and_terminator (bfd *abfd) 2894 { 2895 int count = bfd_get_symcount (abfd); 2896 asymbol **table; 2897 asymbol **orig_table = bfd_get_outsymbols (abfd); 2898 int serno; 2899 struct mmo_symbol_trie root; 2900 int trie_len; 2901 int i; 2902 bfd_byte buf[4]; 2903 2904 /* Create a symbol for "Main". */ 2905 asymbol *fakemain = bfd_make_empty_symbol (abfd); 2906 2907 fakemain->flags = BSF_GLOBAL; 2908 fakemain->value = bfd_get_start_address (abfd); 2909 fakemain->name = MMIX_START_SYMBOL_NAME; 2910 fakemain->section = bfd_abs_section_ptr; 2911 2912 memset (&root, 0, sizeof (root)); 2913 2914 /* Make all symbols take a left turn. */ 2915 root.symchar = 0xff; 2916 2917 /* There must always be a ":Main", so we'll add one if there are no 2918 symbols. Make sure we have room for it. */ 2919 table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); 2920 if (table == NULL) 2921 return FALSE; 2922 2923 memcpy (table, orig_table, count * sizeof (asymbol *)); 2924 2925 /* Move :Main (if there is one) to the first position. This is 2926 necessary to get the same layout of the trie-tree when linking as 2927 when objcopying the result as in the objcopy.exp test "simple objcopy 2928 of executable". It also automatically takes care of assigning serial 2929 number 1 to :Main (as is mandatory). */ 2930 for (i = 0; i < count; i++) 2931 if (table[i] != NULL 2932 && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 2933 && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) 2934 { 2935 asymbol *mainsym = table[i]; 2936 bfd_vma mainvalue 2937 = (mainsym->value 2938 + mainsym->section->output_section->vma 2939 + mainsym->section->output_offset); 2940 memcpy (table + 1, orig_table, i * sizeof (asymbol *)); 2941 table[0] = mainsym; 2942 2943 /* Check that the value assigned to :Main is the same as the entry 2944 address. The default linker script asserts this. This is as 2945 good a place as any to check this consistency. */ 2946 if (mainvalue != bfd_get_start_address (abfd) 2947 && !mmo_ignore_symbol_consistency (abfd)) 2948 { 2949 /* Arbitrary buffer to hold the printable representation of a 2950 vma. */ 2951 char vmas_main[40]; 2952 char vmas_start[40]; 2953 bfd_vma vma_start = bfd_get_start_address (abfd); 2954 2955 sprintf_vma (vmas_main, mainvalue); 2956 sprintf_vma (vmas_start, vma_start); 2957 2958 (*_bfd_error_handler) 2959 (_("%s: Bad symbol definition: `Main' set to %s rather" 2960 " than the start address %s\n"), 2961 bfd_get_filename (abfd), vmas_main, vmas_start); 2962 bfd_set_error (bfd_error_bad_value); 2963 return FALSE; 2964 } 2965 break; 2966 } 2967 if (i == count && count != 0) 2968 { 2969 /* When there are symbols, there must be a :Main. There was no 2970 :Main, so we need to add it manually. */ 2971 memcpy (table + 1, orig_table, count * sizeof (asymbol *)); 2972 table[0] = fakemain; 2973 count++; 2974 } 2975 2976 /* Don't bother inspecting symbols in plugin dummy objects; their 2977 symbols aren't fully inspectable. */ 2978 if ((abfd->flags & BFD_PLUGIN) == 0) 2979 { 2980 for (i = 0, serno = 1; i < count && table[i] != NULL; i++) 2981 { 2982 asymbol *s = table[i]; 2983 2984 /* It's not enough to consult bfd_is_local_label, since it does not 2985 mean "local" in the sense of linkable-and-observable-after-link. 2986 Let's just check the BSF_GLOBAL flag. 2987 2988 Also, don't export symbols with characters not in the 2989 allowed set. */ 2990 if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL 2991 && strspn (s->name, 2992 valid_mmo_symbol_character_set) == strlen (s->name)) 2993 { 2994 struct mmo_symbol sym; 2995 memset (&sym, 0, sizeof (sym)); 2996 2997 /* Need to strip const here; strdup:ing would leak and the 2998 existing string must be safe to reuse. */ 2999 sym.name = (char *) s->name; 3000 sym.value = 3001 s->value 3002 + s->section->output_section->vma 3003 + s->section->output_offset; 3004 3005 if (bfd_is_und_section (s->section)) 3006 sym.sym_type = mmo_undef_sym; 3007 else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 3008 /* The encoding of data symbols require that the "rest" 3009 of the value fits in 6 bytes, so the upper two bytes 3010 must be 0x2000. All other symbols get to be the 3011 absolute type. */ 3012 && (sym.value >> 48) == 0x2000) 3013 sym.sym_type = mmo_data_sym; 3014 else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) 3015 sym.sym_type = mmo_reg_sym; 3016 else if (strcmp (s->section->name, 3017 MMIX_REG_CONTENTS_SECTION_NAME) == 0) 3018 { 3019 sym.sym_type = mmo_reg_sym; 3020 sym.value /= 8; 3021 } 3022 else 3023 sym.sym_type = mmo_abs_sym; 3024 3025 /* FIXME: We assume the order of the received symbols is an 3026 ordered mapping of the serial numbers. This is not 3027 necessarily true if we e.g. objcopy a mmo file to another and 3028 there are gaps in the numbering. Not sure if this can 3029 happen. Not sure what to do. */ 3030 sym.serno = serno++; 3031 3032 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 3033 return FALSE; 3034 } 3035 } 3036 } 3037 3038 /* Change the root node to be a ":"-prefix. */ 3039 root.symchar = ':'; 3040 root.middle = root.left; 3041 root.right = NULL; 3042 root.left = NULL; 3043 3044 /* We have to find out if we can fit the whole symbol table in the mmo 3045 symtab. It would be bad to assume we can always fit it in 262144 3046 bytes. If we can't, just leave the Main symbol. */ 3047 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 3048 3049 if (trie_len > 0xffff) 3050 { 3051 /* Test this code by using a lower limit in the test above and check 3052 that the single "Main" symbol is emitted and handled properly. 3053 There's no specific test-case. */ 3054 struct mmo_symbol sym; 3055 3056 (*_bfd_error_handler) 3057 (_("%s: warning: symbol table too large for mmo, larger than 65535" 3058 " 32-bit words: %d. Only `Main' will be emitted.\n"), 3059 bfd_get_filename (abfd), trie_len); 3060 3061 memset (&sym, 0, sizeof (sym)); 3062 sym.sym_type = mmo_abs_sym; 3063 sym.name = MMIX_START_SYMBOL_NAME; 3064 sym.serno = 1; 3065 sym.value = bfd_get_start_address (abfd); 3066 3067 /* Then patch up a symbol table to be just the ":Main" symbol. */ 3068 memset (&root, 0, sizeof (root)); 3069 root.left = root.middle; 3070 root.symchar = 0xff; 3071 root.middle = NULL; 3072 root.right = NULL; 3073 3074 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 3075 return FALSE; 3076 3077 root.symchar = ':'; 3078 root.middle = root.left; 3079 root.right = NULL; 3080 root.left = NULL; 3081 3082 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 3083 } 3084 3085 /* Reset the written-bytes counter. */ 3086 abfd->tdata.mmo_data->byte_no = 0; 3087 3088 /* Put out the lop_stab mark. */ 3089 bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); 3090 if (bfd_bwrite (buf, 4, abfd) != 4) 3091 return FALSE; 3092 3093 /* Dump out symbols. */ 3094 mmo_internal_3_dump (abfd, &root); 3095 3096 if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) 3097 { 3098 /* I haven't seen this trig. It seems no use claiming this case 3099 isn't debugged and abort if we get here. Instead emit a 3100 diagnostic and fail "normally". */ 3101 (*_bfd_error_handler) 3102 (_("%s: internal error, symbol table changed size from %d to %d" 3103 " words\n"), 3104 bfd_get_filename (abfd), trie_len, 3105 (abfd->tdata.mmo_data->byte_no + 3)/4); 3106 bfd_set_error (bfd_error_bad_value); 3107 return FALSE; 3108 } 3109 3110 /* Dump out remaining bytes in the buffer and handle I/O errors by 3111 propagating errors. */ 3112 if ((abfd->tdata.mmo_data->byte_no % 4) != 0 3113 || abfd->tdata.mmo_data->have_error) 3114 { 3115 memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), 3116 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); 3117 3118 if (abfd->tdata.mmo_data->have_error 3119 || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 3120 return FALSE; 3121 } 3122 3123 bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); 3124 return bfd_bwrite (buf, 4, abfd) == 4; 3125 } 3126 3127 /* Write section unless it is the register contents section. For that, we 3128 instead store the section in the supplied pointer. This function is 3129 used through bfd_map_over_sections. */ 3130 3131 static void 3132 mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) 3133 { 3134 struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; 3135 3136 if (! infop->retval) 3137 return; 3138 3139 if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 3140 { 3141 infop->reg_section = sec; 3142 return; 3143 } 3144 3145 /* Exclude the convenience register section. */ 3146 if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) 3147 { 3148 if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 3149 { 3150 /* Make sure it hasn't got contents. It seems impossible to 3151 make it carry contents, so we don't have a test-case for 3152 this. */ 3153 (*_bfd_error_handler) 3154 (_("%s: internal error, internal register section %s had" 3155 " contents\n"), 3156 bfd_get_filename (abfd), sec->name); 3157 bfd_set_error (bfd_error_bad_value); 3158 infop->retval = FALSE; 3159 return; 3160 } 3161 3162 return; 3163 } 3164 3165 infop->retval = mmo_internal_write_section (abfd, sec); 3166 } 3167 3168 /* Do the actual output of a file. Assumes mmo_set_section_contents is 3169 already called. */ 3170 3171 static bfd_boolean 3172 mmo_write_object_contents (bfd *abfd) 3173 { 3174 struct mmo_write_sec_info wsecinfo; 3175 3176 /* First, there are a few words of preamble. */ 3177 if (! mmo_internal_write_header (abfd)) 3178 return FALSE; 3179 3180 wsecinfo.reg_section = NULL; 3181 wsecinfo.retval = TRUE; 3182 3183 bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, 3184 &wsecinfo); 3185 3186 if (! wsecinfo.retval) 3187 return FALSE; 3188 3189 if (wsecinfo.reg_section != NULL) 3190 { 3191 asection *sec = wsecinfo.reg_section; 3192 unsigned int z = (unsigned int) (sec->vma / 8); 3193 3194 /* Registers 0..31 must not be global. Do sanity check on the "vma" 3195 of the register contents section and check that it corresponds to 3196 the length of the section. */ 3197 if (z < 32 || z >= 255 || (sec->vma & 7) != 0 3198 || sec->vma != 256 * 8 - sec->size - 8) 3199 { 3200 bfd_set_error (bfd_error_bad_value); 3201 3202 if (sec->size == 0) 3203 /* There must always be at least one such register. */ 3204 (*_bfd_error_handler) 3205 (_("%s: no initialized registers; section length 0\n"), 3206 bfd_get_filename (abfd)); 3207 else if (sec->vma > (256 - 32) * 8) 3208 /* Provide better error message for the case of too many 3209 global registers. */ 3210 (*_bfd_error_handler) 3211 (_("%s: too many initialized registers; section length %ld\n"), 3212 bfd_get_filename (abfd), 3213 (long) sec->size); 3214 else 3215 (*_bfd_error_handler) 3216 (_("%s: invalid start address for initialized registers of" 3217 " length %ld: 0x%lx%08lx\n"), 3218 bfd_get_filename (abfd), 3219 (long) sec->size, 3220 (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); 3221 3222 return FALSE; 3223 } 3224 3225 if (! mmo_internal_write_post (abfd, z, sec)) 3226 return FALSE; 3227 } 3228 else 3229 if (! mmo_internal_write_post (abfd, 255, NULL)) 3230 return FALSE; 3231 3232 return mmo_write_symbols_and_terminator (abfd); 3233 } 3234 3235 /* If there's anything in particular in a mmo bfd that we want to free, 3236 make this a real function. Only do this if you see major memory 3237 thrashing; zealous free:ing will cause unwanted behavior, especially if 3238 you "free" memory allocated with "bfd_alloc", or even "bfd_release" a 3239 block allocated with "bfd_alloc"; they're really allocated from an 3240 obstack, and we don't know what was allocated there since this 3241 particular allocation. */ 3242 3243 #define mmo_close_and_cleanup _bfd_generic_close_and_cleanup 3244 #define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info 3245 3246 /* Perhaps we need to adjust this one; mmo labels (originally) without a 3247 leading ':' might more appropriately be called local. */ 3248 #define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name 3249 #define mmo_bfd_is_target_special_symbol \ 3250 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 3251 3252 #define mmo_get_symbol_version_string \ 3253 _bfd_nosymbols_get_symbol_version_string 3254 3255 /* Is this one really used or defined by anyone? */ 3256 #define mmo_get_lineno _bfd_nosymbols_get_lineno 3257 3258 /* FIXME: We can do better on this one, if we have a dwarf2 .debug_line 3259 section or if MMO line numbers are implemented. */ 3260 #define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line 3261 #define mmo_find_line _bfd_nosymbols_find_line 3262 #define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info 3263 #define mmo_make_empty_symbol _bfd_generic_make_empty_symbol 3264 #define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 3265 #define mmo_read_minisymbols _bfd_generic_read_minisymbols 3266 #define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 3267 3268 #define mmo_get_section_contents_in_window \ 3269 _bfd_generic_get_section_contents_in_window 3270 #define mmo_bfd_get_relocated_section_contents \ 3271 bfd_generic_get_relocated_section_contents 3272 #define mmo_bfd_gc_sections bfd_generic_gc_sections 3273 #define mmo_bfd_lookup_section_flags bfd_generic_lookup_section_flags 3274 #define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 3275 #define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols 3276 #define mmo_bfd_link_just_syms _bfd_generic_link_just_syms 3277 #define mmo_bfd_copy_link_hash_symbol_type \ 3278 _bfd_generic_copy_link_hash_symbol_type 3279 #define mmo_bfd_final_link _bfd_generic_final_link 3280 #define mmo_bfd_link_split_section _bfd_generic_link_split_section 3281 #define mmo_bfd_link_check_relocs _bfd_generic_link_check_relocs 3282 3283 /* Strictly speaking, only MMIX uses this restricted format, but let's not 3284 stop anybody from shooting themselves in the foot. */ 3285 #define mmo_set_arch_mach bfd_default_set_arch_mach 3286 #define mmo_bfd_relax_section bfd_generic_relax_section 3287 #define mmo_bfd_merge_sections bfd_generic_merge_sections 3288 #define mmo_bfd_is_group_section bfd_generic_is_group_section 3289 #define mmo_bfd_discard_group bfd_generic_discard_group 3290 #define mmo_section_already_linked \ 3291 _bfd_generic_section_already_linked 3292 #define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol 3293 3294 /* We want to copy time of creation, otherwise we'd use 3295 BFD_JUMP_TABLE_COPY (_bfd_generic). */ 3296 #define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data 3297 #define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data 3298 #define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data 3299 #define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data 3300 #define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags 3301 #define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data 3302 3303 const bfd_target mmix_mmo_vec = 3304 { 3305 "mmo", /* name */ 3306 bfd_target_mmo_flavour, 3307 BFD_ENDIAN_BIG, /* target byte order */ 3308 BFD_ENDIAN_BIG, /* target headers byte order */ 3309 3310 /* FIXME: Might need adjustments. */ 3311 (HAS_RELOC | EXEC_P | /* object flags */ 3312 HAS_LINENO | HAS_DEBUG | 3313 HAS_SYMS | HAS_LOCALS | WP_TEXT), 3314 3315 /* FIXME: Might need adjustments. */ 3316 (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD 3317 | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), 3318 /* section flags */ 3319 0, /* leading underscore */ 3320 ' ', /* ar_pad_char */ 3321 16, /* ar_max_namelen */ 3322 0, /* match priority. */ 3323 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3324 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3325 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ 3326 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3327 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3328 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ 3329 3330 { 3331 _bfd_dummy_target, 3332 mmo_object_p, /* bfd_check_format */ 3333 _bfd_dummy_target, 3334 _bfd_dummy_target, 3335 }, 3336 { 3337 bfd_false, 3338 mmo_mkobject, 3339 bfd_false, 3340 bfd_false, 3341 }, 3342 { /* bfd_write_contents */ 3343 bfd_false, 3344 mmo_write_object_contents, 3345 bfd_false, 3346 bfd_false, 3347 }, 3348 3349 BFD_JUMP_TABLE_GENERIC (mmo), 3350 BFD_JUMP_TABLE_COPY (mmo), 3351 BFD_JUMP_TABLE_CORE (_bfd_nocore), 3352 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 3353 BFD_JUMP_TABLE_SYMBOLS (mmo), 3354 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 3355 BFD_JUMP_TABLE_WRITE (mmo), 3356 BFD_JUMP_TABLE_LINK (mmo), 3357 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 3358 3359 NULL, 3360 3361 NULL 3362 }; 3363
