1 /* BFD back-end for mmo objects (MMIX-specific object-format). 2 Copyright 2001, 2002, 2003, 2004, 2005 3 Free Software Foundation, Inc. 4 Written by Hans-Peter Nilsson (hp@bitrange.com). 5 Infrastructure and other bits originally copied from srec.c and 6 binary.c. 7 8 This file is part of BFD, the Binary File Descriptor library. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 23 24 /* 25 SECTION 26 mmo backend 27 28 The mmo object format is used exclusively together with Professor 29 Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator 30 @command{mmix} which is available at 31 @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz} 32 understands this format. That package also includes a combined 33 assembler and linker called @command{mmixal}. The mmo format has 34 no advantages feature-wise compared to e.g. ELF. It is a simple 35 non-relocatable object format with no support for archives or 36 debugging information, except for symbol value information and 37 line numbers (which is not yet implemented in BFD). See 38 @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more 39 information about MMIX. The ELF format is used for intermediate 40 object files in the BFD implementation. 41 42 @c We want to xref the symbol table node. A feature in "chew" 43 @c requires that "commands" do not contain spaces in the 44 @c arguments. Hence the hyphen in "Symbol-table". 45 @menu 46 @* File layout:: 47 @* Symbol-table:: 48 @* mmo section mapping:: 49 @end menu 50 51 INODE 52 File layout, Symbol-table, mmo, mmo 53 SUBSECTION 54 File layout 55 56 The mmo file contents is not partitioned into named sections as 57 with e.g.@: ELF. Memory areas is formed by specifying the 58 location of the data that follows. Only the memory area 59 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so 60 it is used for code (and constants) and the area 61 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for 62 writable data. @xref{mmo section mapping}. 63 64 There is provision for specifying ``special data'' of 65536 65 different types. We use type 80 (decimal), arbitrarily chosen the 66 same as the ELF <<e_machine>> number for MMIX, filling it with 67 section information normally found in ELF objects. @xref{mmo 68 section mapping}. 69 70 Contents is entered as 32-bit words, xor:ed over previous 71 contents, always zero-initialized. A word that starts with the 72 byte @samp{0x98} forms a command called a @samp{lopcode}, where 73 the next byte distinguished between the thirteen lopcodes. The 74 two remaining bytes, called the @samp{Y} and @samp{Z} fields, or 75 the @samp{YZ} field (a 16-bit big-endian number), are used for 76 various purposes different for each lopcode. As documented in 77 @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz}, 78 the lopcodes are: 79 80 @table @code 81 @item lop_quote 82 0x98000001. The next word is contents, regardless of whether it 83 starts with 0x98 or not. 84 85 @item lop_loc 86 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location 87 directive, setting the location for the next data to the next 88 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), 89 plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment 90 and 2 for the data segment. 91 92 @item lop_skip 93 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. 94 95 @item lop_fixo 96 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location 97 as 64 bits into the location pointed to by the next 32-bit 98 (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * 99 2^56}. 100 101 @item lop_fixr 102 0x9804YYZZ. @samp{YZ} is stored into the current location plus 103 @math{2 - 4 * YZ}. 104 105 @item lop_fixrx 106 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from 107 the following 32-bit word are used in a manner similar to 108 @samp{YZ} in lop_fixr: it is xor:ed into the current location 109 minus @math{4 * L}. The first byte of the word is 0 or 1. If it 110 is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, 111 then @math{L = (@var{lowest 24 bits of word})}. 112 113 @item lop_file 114 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of 115 32-bit words. Set the file number to @samp{Y} and the line 116 counter to 0. The next @math{Z * 4} bytes contain the file name, 117 padded with zeros if the count is not a multiple of four. The 118 same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for 119 all but the first occurrence. 120 121 @item lop_line 122 0x9807YYZZ. @samp{YZ} is the line number. Together with 123 lop_file, it forms the source location for the next 32-bit word. 124 Note that for each non-lopcode 32-bit word, line numbers are 125 assumed incremented by one. 126 127 @item lop_spec 128 0x9808YYZZ. @samp{YZ} is the type number. Data until the next 129 lopcode other than lop_quote forms special data of type @samp{YZ}. 130 @xref{mmo section mapping}. 131 132 Other types than 80, (or type 80 with a content that does not 133 parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> 134 where @var{n} is the @samp{YZ}-type. The flags for such a 135 sections say not to allocate or load the data. The vma is 0. 136 Contents of multiple occurrences of special data @var{n} is 137 concatenated to the data of the previous lop_spec @var{n}s. The 138 location in data or code at which the lop_spec occurred is lost. 139 140 @item lop_pre 141 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the 142 length of header information in 32-bit words, where the first word 143 tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. 144 145 @item lop_post 146 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all 147 content-generating lopcodes in a program. The @samp{Z} field 148 denotes the value of @samp{rG} at the beginning of the program. 149 The following @math{256 - Z} big-endian 64-bit words are loaded 150 into global registers @samp{$G} @dots{} @samp{$255}. 151 152 @item lop_stab 153 0x980b0000. The next-to-last lopcode in a program. Must follow 154 immediately after the lop_post lopcode and its data. After this 155 lopcode follows all symbols in a compressed format 156 (@pxref{Symbol-table}). 157 158 @item lop_end 159 0x980cYYZZ. The last lopcode in a program. It must follow the 160 lop_stab lopcode and its data. The @samp{YZ} field contains the 161 number of 32-bit words of symbol table information after the 162 preceding lop_stab lopcode. 163 @end table 164 165 Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and 166 <<lop_fixo>> are not generated by BFD, but are handled. They are 167 generated by <<mmixal>>. 168 169 EXAMPLE 170 This trivial one-label, one-instruction file: 171 172 | :Main TRAP 1,2,3 173 174 can be represented this way in mmo: 175 176 | 0x98090101 - lop_pre, one 32-bit word with timestamp. 177 | <timestamp> 178 | 0x98010002 - lop_loc, text segment, using a 64-bit address. 179 | Note that mmixal does not emit this for the file above. 180 | 0x00000000 - Address, high 32 bits. 181 | 0x00000000 - Address, low 32 bits. 182 | 0x98060002 - lop_file, 2 32-bit words for file-name. 183 | 0x74657374 - "test" 184 | 0x2e730000 - ".s\0\0" 185 | 0x98070001 - lop_line, line 1. 186 | 0x00010203 - TRAP 1,2,3 187 | 0x980a00ff - lop_post, setting $255 to 0. 188 | 0x00000000 189 | 0x00000000 190 | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. 191 | 0x203a4040 @xref{Symbol-table}. 192 | 0x10404020 193 | 0x4d206120 194 | 0x69016e00 195 | 0x81000000 196 | 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ 197 198 #include "bfd.h" 199 #include "sysdep.h" 200 #include "libbfd.h" 201 #include "libiberty.h" 202 #include "elf/mmix.h" 203 #include "opcode/mmix.h" 204 205 #define LOP 0x98 206 #define LOP_QUOTE 0 207 #define LOP_LOC 1 208 #define LOP_SKIP 2 209 #define LOP_FIXO 3 210 #define LOP_FIXR 4 211 #define LOP_FIXRX 5 212 #define LOP_FILE 6 213 #define LOP_LINE 7 214 #define LOP_SPEC 8 215 #define LOP_PRE 9 216 #define LOP_POST 10 217 #define LOP_STAB 11 218 #define LOP_END 12 219 220 #define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) 221 #define SPEC_DATA_SECTION 80 222 #define LOP_SPEC_SECTION \ 223 ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) 224 225 /* Must be a power of two. If you change this to be >= 64k, you need a 226 new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ 227 #define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) 228 229 /* An arbitrary number for the maximum length section name size. */ 230 #define MAX_SECTION_NAME_SIZE (1024 * 1024) 231 232 /* A quite arbitrary number for the maximum length section size. */ 233 #define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) 234 235 #define MMO3_WCHAR 0x80 236 #define MMO3_LEFT 0x40 237 #define MMO3_MIDDLE 0x20 238 #define MMO3_RIGHT 0x10 239 #define MMO3_TYPEBITS 0xf 240 #define MMO3_REGQUAL_BITS 0xf 241 #define MMO3_UNDEF 2 242 #define MMO3_DATA 8 243 #define MMO3_SYMBITS 0x2f 244 245 /* Put these everywhere in new code. */ 246 #define FATAL_DEBUG \ 247 _bfd_abort (__FILE__, __LINE__, \ 248 "Internal: Non-debugged code (test-case missing)") 249 250 #define BAD_CASE(x) \ 251 _bfd_abort (__FILE__, __LINE__, \ 252 "bad case for " #x) 253 254 enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; 255 256 /* When scanning the mmo file, a linked list of mmo_symbol 257 structures is built to represent the symbol table (if there is 258 one). */ 259 260 struct mmo_symbol 261 { 262 struct mmo_symbol *next; 263 char *name; 264 bfd_vma value; 265 enum mmo_sym_type sym_type; 266 unsigned int serno; 267 }; 268 269 struct mmo_data_list_struct 270 { 271 struct mmo_data_list_struct *next; 272 bfd_vma where; 273 bfd_size_type size; 274 bfd_size_type allocated_size; 275 bfd_byte data[1]; 276 }; 277 278 typedef struct mmo_data_list_struct mmo_data_list_type; 279 280 struct mmo_symbol_trie 281 { 282 struct mmo_symbol_trie *left; 283 struct mmo_symbol_trie *right; 284 struct mmo_symbol_trie *middle; 285 286 bfd_byte symchar; 287 288 /* A zero name means there's nothing here. */ 289 struct mmo_symbol sym; 290 }; 291 292 /* The mmo tdata information. */ 293 294 struct mmo_data_struct 295 { 296 struct mmo_symbol *symbols; 297 struct mmo_symbol *symtail; 298 asymbol *csymbols; 299 300 /* File representation of time (NULL) when this file was created. */ 301 bfd_byte created[4]; 302 303 /* When we're reading bytes recursively, check this occasionally. 304 Also holds write errors. */ 305 bfd_boolean have_error; 306 307 /* Max symbol length that may appear in the lop_stab table. Note that 308 this table might just hold a subset of symbols for not-really large 309 programs, as it can only be 65536 * 4 bytes large. */ 310 int max_symbol_length; 311 312 /* Here's the symbol we build in lop_stab. */ 313 char *lop_stab_symbol; 314 315 /* Index into lop_stab_symbol for the next character when parsing the 316 symbol information. */ 317 int symbol_position; 318 319 /* When creating arbitrary sections, we need to count section numbers. */ 320 int sec_no; 321 322 /* When writing or reading byte-wise, we need to count the bytes 323 within a 32-bit word. */ 324 int byte_no; 325 326 /* We also need a buffer to hold the bytes we count reading or writing. */ 327 bfd_byte buf[4]; 328 }; 329 330 typedef struct mmo_data_struct tdata_type; 331 332 struct mmo_section_data_struct 333 { 334 mmo_data_list_type *head; 335 mmo_data_list_type *tail; 336 }; 337 338 #define mmo_section_data(sec) \ 339 ((struct mmo_section_data_struct *) (sec)->used_by_bfd) 340 341 /* These structures are used in bfd_map_over_sections constructs. */ 342 343 /* Used when writing out sections; all but the register contents section 344 which is stored in reg_section. */ 345 struct mmo_write_sec_info 346 { 347 asection *reg_section; 348 bfd_boolean retval; 349 }; 350 351 /* Used when trying to find a section corresponding to addr. */ 352 struct mmo_find_sec_info 353 { 354 asection *sec; 355 bfd_vma addr; 356 }; 357 358 static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); 359 static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); 360 static void mmo_find_sec_w_addr (bfd *, asection *, void *); 361 static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); 362 static asection *mmo_make_section (bfd *, const char *); 363 static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 364 static void mmo_print_symbol (bfd *, void *, asymbol *, 365 bfd_print_symbol_type); 366 static void mmo_init (void); 367 static bfd_boolean mmo_mkobject (bfd *); 368 static bfd_boolean mmo_scan (bfd *); 369 static asection *mmo_decide_section (bfd *, bfd_vma); 370 static asection *mmo_get_generic_spec_data_section (bfd *, int); 371 static asection *mmo_get_spec_section (bfd *, int); 372 static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); 373 static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); 374 static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); 375 static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); 376 static const bfd_target *mmo_object_p (bfd *); 377 static void mmo_map_set_sizes (bfd *, asection *, void *); 378 static bfd_boolean mmo_get_symbols (bfd *); 379 static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, 380 enum mmo_sym_type, unsigned int); 381 static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, 382 file_ptr, bfd_size_type); 383 static long mmo_get_symtab_upper_bound (bfd *); 384 static long mmo_canonicalize_symtab (bfd *, asymbol **); 385 static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 386 static void mmo_print_symbol (bfd *, void *, asymbol *, 387 bfd_print_symbol_type); 388 static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, 389 file_ptr, bfd_size_type); 390 static int mmo_sizeof_headers (bfd *, bfd_boolean); 391 static long mmo_get_reloc_upper_bound (bfd *, asection *); 392 static bfd_boolean mmo_internal_write_header (bfd *); 393 static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); 394 static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, 395 const struct mmo_symbol *); 396 static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); 397 static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); 398 static void mmo_beb128_out (bfd *, int, int); 399 static bfd_boolean mmo_internal_write_section (bfd *, asection *); 400 static void mmo_write_tetra (bfd *, unsigned int); 401 static void mmo_write_tetra_raw (bfd *, unsigned int); 402 static void mmo_write_octa (bfd *, bfd_vma); 403 static void mmo_write_octa_raw (bfd *, bfd_vma); 404 static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); 405 static bfd_boolean mmo_flush_chunk (bfd *); 406 static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, 407 unsigned int, bfd_vma *); 408 static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); 409 static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); 410 static bfd_boolean mmo_write_symbols_and_terminator (bfd *); 411 static flagword mmo_sec_flags_from_bfd_flags (flagword); 412 static flagword bfd_sec_flags_from_mmo_flags (flagword); 413 static bfd_byte mmo_get_byte (bfd *); 414 static void mmo_write_byte (bfd *, bfd_byte); 415 static bfd_boolean mmo_new_section_hook (bfd *, asection *); 416 static int mmo_sort_mmo_symbols (const void *, const void *); 417 static bfd_boolean mmo_write_object_contents (bfd *); 418 static long mmo_canonicalize_reloc (bfd *, sec_ptr, arelent **, asymbol **); 419 static bfd_boolean mmo_write_section_description (bfd *, asection *); 420 static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p (bfd *, 421 asection *); 422 423 /* Global "const" variables initialized once. Must not depend on 424 particular input or caller; put such things into the bfd or elsewhere. 425 Look ma, no static per-invocation data! */ 426 427 static 428 char valid_mmo_symbol_character_set[/* A-Z a-z (we assume consecutive 429 codes; sorry EBCDIC:ers!). */ 430 + 'Z' - 'A' + 1 + 'z' - 'a' + 1 431 /* Digits. */ 432 + 10 433 /* ':' and '_'. */ 434 + 1 + 1 435 /* Codes higher than 126. */ 436 + 256 - 126 437 /* Ending zero. */ 438 + 1]; 439 440 441 /* Get section SECNAME or create one if it doesn't exist. When creating 442 one, new memory for the name is allocated. */ 443 444 static asection * 445 mmo_make_section (bfd *abfd, const char *secname) 446 { 447 asection *sec = bfd_get_section_by_name (abfd, secname); 448 449 if (sec == NULL) 450 { 451 char *newsecname = strdup (secname); 452 453 if (newsecname == NULL) 454 { 455 (*_bfd_error_handler) 456 (_("%s: No core to allocate section name %s\n"), 457 bfd_get_filename (abfd), secname); 458 bfd_set_error (bfd_error_system_call); 459 return NULL; 460 } 461 sec = bfd_make_section (abfd, newsecname); 462 } 463 464 return sec; 465 } 466 467 /* Nothing to do, but keep as a placeholder if we need it. 468 Note that state that might differ between bfd:s must not be initialized 469 here, nor must it be static. Add it to tdata information instead. */ 470 471 static void 472 mmo_init (void) 473 { 474 static bfd_boolean inited = FALSE; 475 int i = 0; 476 int j = 0; 477 static const char letters[] 478 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:_"; 479 480 if (inited) 481 return; 482 inited = TRUE; 483 484 /* Fill in the set of valid symbol characters. */ 485 strcpy (valid_mmo_symbol_character_set, letters); 486 i = strlen (letters); 487 488 for (j = 126; j < 256; j++) 489 valid_mmo_symbol_character_set[i++] = j; 490 } 491 492 /* Check whether an existing file is an mmo file. */ 493 494 static const bfd_target * 495 mmo_object_p (bfd *abfd) 496 { 497 struct stat statbuf; 498 bfd_byte b[4]; 499 500 mmo_init (); 501 502 if (bfd_stat (abfd, &statbuf) < 0 503 || bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 504 || bfd_bread (b, 4, abfd) != 4) 505 goto bad_final; 506 507 /* All mmo files are a multiple of four bytes long. 508 Only recognize version one. */ 509 if ((statbuf.st_size % 4) != 0 510 || b[0] != LOP || b[1] != LOP_PRE || b[2] != 1) 511 goto bad_format; 512 513 /* Get the last 32-bit word. */ 514 if (bfd_seek (abfd, (file_ptr) statbuf.st_size - 4, SEEK_SET) != 0 515 || bfd_bread (b, 4, abfd) != 4) 516 goto bad_final; 517 518 /* Check if the file ends in a lop_end lopcode. */ 519 if (b[0] != LOP || b[1] != LOP_END || ! mmo_mkobject (abfd)) 520 goto bad_format; 521 522 /* Compute an upper bound on the max symbol length. Not really 523 important as all of the symbol information can only be 256k. */ 524 abfd->tdata.mmo_data->max_symbol_length = (b[2] * 256 + b[3]) * 4; 525 abfd->tdata.mmo_data->lop_stab_symbol 526 = bfd_malloc (abfd->tdata.mmo_data->max_symbol_length + 1); 527 528 if (abfd->tdata.mmo_data->lop_stab_symbol == NULL) 529 { 530 (*_bfd_error_handler) 531 (_("%s: No core to allocate a symbol %d bytes long\n"), 532 bfd_get_filename (abfd), abfd->tdata.mmo_data->max_symbol_length); 533 goto bad_final; 534 } 535 536 /* Read in everything. */ 537 if (! mmo_scan (abfd)) 538 goto bad_format_free; 539 540 if (abfd->symcount > 0) 541 abfd->flags |= HAS_SYMS; 542 543 /* You'll have to tweak this if you want to use this format for other 544 arches (not recommended due to its small-size limitations). Look at 545 the ELF format for how to make it target-generic. */ 546 if (! bfd_default_set_arch_mach (abfd, bfd_arch_mmix, 0)) 547 goto bad_format_free; 548 549 return abfd->xvec; 550 551 bad_format_free: 552 free (abfd->tdata.mmo_data->lop_stab_symbol); 553 bad_format: 554 bfd_set_error (bfd_error_wrong_format); 555 bad_final: 556 return NULL; 557 } 558 559 /* Set up the mmo tdata information. */ 560 561 static bfd_boolean 562 mmo_mkobject (bfd *abfd) 563 { 564 mmo_init (); 565 566 if (abfd->tdata.mmo_data == NULL) 567 { 568 time_t created; 569 570 /* All fields are zero-initialized, so we don't have to explicitly 571 initialize most. */ 572 tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type)); 573 if (tdata == NULL) 574 return FALSE; 575 576 created = time (NULL); 577 bfd_put_32 (abfd, created, tdata->created); 578 579 abfd->tdata.mmo_data = tdata; 580 } 581 582 return TRUE; 583 } 584 585 static bfd_boolean 586 mmo_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 587 { 588 if (bfd_get_flavour (ibfd) != bfd_target_mmo_flavour 589 || bfd_get_flavour (obfd) != bfd_target_mmo_flavour) 590 return TRUE; 591 592 /* Copy the time the copied-from file was created. If people want the 593 time the file was last *modified*, they have that in the normal file 594 information. */ 595 memcpy (obfd->tdata.mmo_data->created, ibfd->tdata.mmo_data->created, 596 sizeof (obfd->tdata.mmo_data->created)); 597 return TRUE; 598 } 599 600 /* Helper functions for mmo_decide_section, used through 601 bfd_map_over_sections. */ 602 603 static void 604 mmo_find_sec_w_addr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) 605 { 606 struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; 607 bfd_vma vma = bfd_get_section_vma (abfd, sec); 608 609 /* Ignore sections that aren't loaded. */ 610 if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) 611 != (SEC_LOAD | SEC_ALLOC)) 612 return; 613 614 if (infop->addr >= vma && infop->addr < vma + sec->size) 615 infop->sec = sec; 616 } 617 618 static void 619 mmo_find_sec_w_addr_grow (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *p) 620 { 621 struct mmo_find_sec_info *infop = (struct mmo_find_sec_info *) p; 622 bfd_vma vma = bfd_get_section_vma (abfd, sec); 623 624 /* Ignore sections that aren't loaded. */ 625 if ((bfd_get_section_flags (abfd, sec) & (SEC_LOAD | SEC_ALLOC)) 626 != (SEC_LOAD | SEC_ALLOC)) 627 return; 628 629 if (infop->addr >= vma && infop->addr < vma + MAX_ARTIFICIAL_SECTION_SIZE) 630 infop->sec = sec; 631 } 632 633 /* Find a section that corresponds to a VMA. Automatically create .text 634 or .data and set current section to it, depending on what vma. If we 635 can't deduce a section, make one up as ".MMIX.sec.N", where N is an 636 increasing number. */ 637 638 static asection * 639 mmo_decide_section (bfd *abfd, bfd_vma vma) 640 { 641 asection *sec = NULL; 642 char sec_name[sizeof (".MMIX.sec.") + 20]; 643 struct mmo_find_sec_info info; 644 645 info.addr = vma; 646 info.sec = NULL; 647 648 /* First see if there's a section that would match exactly. */ 649 bfd_map_over_sections (abfd, mmo_find_sec_w_addr, &info); 650 651 if (info.sec != NULL) 652 return info.sec; 653 654 /* If there's no such section, try and expand one of the existing ones, 655 up to a limit. Make sure we have .text and .data before we try that; 656 create them corresponding to expected addresses and set flags to make 657 them match the "loaded and with contents" expectation. */ 658 if ((vma >> 56) == 0) 659 { 660 sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); 661 662 if (sec == NULL) 663 return NULL; 664 665 if (! sec->user_set_vma) 666 bfd_set_section_vma (abfd, sec, vma); 667 if (! bfd_set_section_flags (abfd, sec, 668 bfd_get_section_flags (abfd, sec) 669 | SEC_CODE | SEC_LOAD | SEC_ALLOC)) 670 return NULL; 671 } 672 else if ((vma >> 56) == 0x20) 673 { 674 sec = bfd_make_section_old_way (abfd, MMO_DATA_SECTION_NAME); 675 676 if (sec == NULL) 677 return NULL; 678 679 if (! sec->user_set_vma) 680 bfd_set_section_vma (abfd, sec, vma); 681 if (! bfd_set_section_flags (abfd, sec, 682 bfd_get_section_flags (abfd, sec) 683 | SEC_LOAD | SEC_ALLOC)) 684 return NULL; 685 } 686 687 bfd_map_over_sections (abfd, mmo_find_sec_w_addr_grow, &info); 688 689 if (info.sec != NULL) 690 return info.sec; 691 692 /* If there's still no suitable section, make a new one. */ 693 sprintf (sec_name, ".MMIX.sec.%d", abfd->tdata.mmo_data->sec_no++); 694 sec = mmo_make_section (abfd, sec_name); 695 if (! sec->user_set_vma) 696 bfd_set_section_vma (abfd, sec, vma); 697 698 if (! bfd_set_section_flags (abfd, sec, 699 bfd_get_section_flags (abfd, sec) 700 | SEC_LOAD | SEC_ALLOC)) 701 return NULL; 702 return sec; 703 } 704 705 /* Xor in a 64-bit value VALUE at VMA. */ 706 707 static INLINE void 708 mmo_xore_64 (asection *sec, bfd_vma vma, bfd_vma value) 709 { 710 bfd_byte *loc = mmo_get_loc (sec, vma, 8); 711 bfd_vma prev = bfd_get_64 (sec->owner, loc); 712 713 value ^= prev; 714 bfd_put_64 (sec->owner, value, loc); 715 } 716 717 /* Xor in a 32-bit value VALUE at VMA. */ 718 719 static INLINE void 720 mmo_xore_32 (asection *sec, bfd_vma vma, unsigned int value) 721 { 722 bfd_byte *loc = mmo_get_loc (sec, vma, 4); 723 unsigned int prev = bfd_get_32 (sec->owner, loc); 724 725 value ^= prev; 726 bfd_put_32 (sec->owner, value, loc); 727 } 728 729 /* Xor in a 16-bit value VALUE at VMA. */ 730 731 static INLINE void 732 mmo_xore_16 (asection *sec, bfd_vma vma, unsigned int value) 733 { 734 bfd_byte *loc = mmo_get_loc (sec, vma, 2); 735 unsigned int prev = bfd_get_16 (sec->owner, loc); 736 737 value ^= prev; 738 bfd_put_16 (sec->owner, value, loc); 739 } 740 741 /* Write a 32-bit word to output file, no lop_quote generated. */ 742 743 static INLINE void 744 mmo_write_tetra_raw (bfd *abfd, unsigned int value) 745 { 746 bfd_byte buf[4]; 747 748 bfd_put_32 (abfd, value, buf); 749 750 if (bfd_bwrite (buf, 4, abfd) != 4) 751 abfd->tdata.mmo_data->have_error = TRUE; 752 } 753 754 /* Write a 32-bit word to output file; lop_quote if necessary. */ 755 756 static INLINE void 757 mmo_write_tetra (bfd *abfd, unsigned int value) 758 { 759 if (((value >> 24) & 0xff) == LOP) 760 mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); 761 762 mmo_write_tetra_raw (abfd, value); 763 } 764 765 /* Write a 64-bit word to output file, perhaps with lop_quoting. */ 766 767 static INLINE void 768 mmo_write_octa (bfd *abfd, bfd_vma value) 769 { 770 mmo_write_tetra (abfd, (unsigned int) (value >> 32)); 771 mmo_write_tetra (abfd, (unsigned int) value); 772 } 773 774 /* Write a 64-bit word to output file, without lop_quoting. */ 775 776 static INLINE void 777 mmo_write_octa_raw (bfd *abfd, bfd_vma value) 778 { 779 mmo_write_tetra_raw (abfd, (unsigned int) (value >> 32)); 780 mmo_write_tetra_raw (abfd, (unsigned int) value); 781 } 782 783 /* Write quoted contents. Intended to be called multiple times in 784 sequence, followed by a call to mmo_flush_chunk. */ 785 786 static INLINE bfd_boolean 787 mmo_write_chunk (bfd *abfd, const bfd_byte *loc, unsigned int len) 788 { 789 bfd_boolean retval = TRUE; 790 791 /* Fill up a tetra from bytes remaining from a previous chunk. */ 792 if (abfd->tdata.mmo_data->byte_no != 0) 793 { 794 while (abfd->tdata.mmo_data->byte_no < 4 && len != 0) 795 { 796 abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no++] = *loc++; 797 len--; 798 } 799 800 if (abfd->tdata.mmo_data->byte_no == 4) 801 { 802 mmo_write_tetra (abfd, 803 bfd_get_32 (abfd, abfd->tdata.mmo_data->buf)); 804 abfd->tdata.mmo_data->byte_no = 0; 805 } 806 } 807 808 while (len >= 4) 809 { 810 if (loc[0] == LOP) 811 mmo_write_tetra_raw (abfd, LOP_QUOTE_NEXT); 812 813 retval = (retval 814 && ! abfd->tdata.mmo_data->have_error 815 && 4 == bfd_bwrite (loc, 4, abfd)); 816 817 loc += 4; 818 len -= 4; 819 } 820 821 if (len) 822 { 823 memcpy (abfd->tdata.mmo_data->buf, loc, len); 824 abfd->tdata.mmo_data->byte_no = len; 825 } 826 827 if (! retval) 828 abfd->tdata.mmo_data->have_error = TRUE; 829 return retval; 830 } 831 832 /* Flush remaining bytes, from a previous mmo_write_chunk, zero-padded to 833 4 bytes. */ 834 835 static INLINE bfd_boolean 836 mmo_flush_chunk (bfd *abfd) 837 { 838 if (abfd->tdata.mmo_data->byte_no != 0) 839 { 840 memset (abfd->tdata.mmo_data->buf + abfd->tdata.mmo_data->byte_no, 841 0, 4 - abfd->tdata.mmo_data->byte_no); 842 mmo_write_tetra (abfd, 843 bfd_get_32 (abfd, abfd->tdata.mmo_data->buf)); 844 abfd->tdata.mmo_data->byte_no = 0; 845 } 846 847 return ! abfd->tdata.mmo_data->have_error; 848 } 849 850 /* Same, but from a list. */ 851 852 static INLINE bfd_boolean 853 mmo_write_chunk_list (bfd *abfd, mmo_data_list_type *datap) 854 { 855 for (; datap != NULL; datap = datap->next) 856 if (! mmo_write_chunk (abfd, datap->data, datap->size)) 857 return FALSE; 858 859 return mmo_flush_chunk (abfd); 860 } 861 862 /* Write a lop_loc and some contents. A caller needs to call 863 mmo_flush_chunk after calling this function. The location is only 864 output if different than *LAST_VMAP, which is updated after this call. */ 865 866 static bfd_boolean 867 mmo_write_loc_chunk (bfd *abfd, bfd_vma vma, const bfd_byte *loc, 868 unsigned int len, bfd_vma *last_vmap) 869 { 870 /* Find an initial and trailing section of zero tetras; we don't need to 871 write out zeros. FIXME: When we do this, we should emit section size 872 and address specifiers, else objcopy can't always perform an identity 873 translation. Only do this if we *don't* have left-over data from a 874 previous write or the vma of this chunk is *not* the next address, 875 because then data isn't tetrabyte-aligned and we're concatenating to 876 that left-over data. */ 877 878 if (abfd->tdata.mmo_data->byte_no == 0 || vma != *last_vmap) 879 { 880 while (len >= 4 && bfd_get_32 (abfd, loc) == 0) 881 { 882 vma += 4; 883 len -= 4; 884 loc += 4; 885 } 886 887 while (len >= 4 && bfd_get_32 (abfd, loc + len - 4) == 0) 888 len -= 4; 889 } 890 891 /* Only write out the location if it's different than the one the caller 892 (supposedly) previously handled, accounting for omitted leading zeros. */ 893 if (vma != *last_vmap) 894 { 895 /* We might be in the middle of a sequence. */ 896 mmo_flush_chunk (abfd); 897 898 /* We always write the location as 64 bits; no use saving bytes 899 here. */ 900 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_LOC << 16) | 2); 901 mmo_write_octa_raw (abfd, vma); 902 } 903 904 /* Update to reflect end of this chunk, with trailing zeros omitted. */ 905 *last_vmap = vma + len; 906 907 return (! abfd->tdata.mmo_data->have_error 908 && mmo_write_chunk (abfd, loc, len)); 909 } 910 911 /* Same, but from a list. */ 912 913 static INLINE bfd_boolean 914 mmo_write_loc_chunk_list (bfd *abfd, mmo_data_list_type *datap) 915 { 916 /* Get an address different than the address of the first chunk. */ 917 bfd_vma last_vma = datap ? datap->where - 1 : 0; 918 919 for (; datap != NULL; datap = datap->next) 920 if (! mmo_write_loc_chunk (abfd, datap->where, datap->data, datap->size, 921 &last_vma)) 922 return FALSE; 923 924 return mmo_flush_chunk (abfd); 925 } 926 927 /* Make a .MMIX.spec_data.N section. */ 928 929 static asection * 930 mmo_get_generic_spec_data_section (bfd *abfd, int spec_data_number) 931 { 932 asection *sec; 933 char secname[sizeof (MMIX_OTHER_SPEC_SECTION_PREFIX) + 20] 934 = MMIX_OTHER_SPEC_SECTION_PREFIX; 935 936 sprintf (secname + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX), 937 "%d", spec_data_number); 938 939 sec = mmo_make_section (abfd, secname); 940 941 return sec; 942 } 943 944 /* Make a special section for SPEC_DATA_NUMBER. If it is the one we use 945 ourselves, parse some of its data to get at the section name. */ 946 947 static asection * 948 mmo_get_spec_section (bfd *abfd, int spec_data_number) 949 { 950 char *secname; 951 asection *sec; 952 bfd_byte buf[4]; 953 unsigned int secname_length; 954 unsigned int i; 955 bfd_vma section_length; 956 bfd_vma section_vma; 957 mmo_data_list_type *loc; 958 flagword flags; 959 long orig_pos; 960 961 /* If this isn't the "special" special data, then make a placeholder 962 section. */ 963 if (spec_data_number != SPEC_DATA_SECTION) 964 return mmo_get_generic_spec_data_section (abfd, spec_data_number); 965 966 /* Seek back to this position if there was a format error. */ 967 orig_pos = bfd_tell (abfd); 968 969 /* Read the length (in 32-bit words). */ 970 if (bfd_bread (buf, 4, abfd) != 4) 971 goto format_error; 972 973 if (buf[0] == LOP) 974 { 975 if (buf[1] != LOP_QUOTE) 976 goto format_error; 977 978 if (bfd_bread (buf, 4, abfd) != 4) 979 goto format_error; 980 } 981 982 /* We don't care to keep the name length accurate. It's 983 zero-terminated. */ 984 secname_length = bfd_get_32 (abfd, buf) * 4; 985 986 /* Check section name length for sanity. */ 987 if (secname_length > MAX_SECTION_NAME_SIZE) 988 goto format_error; 989 990 /* This should be free'd regardless if a section is created. */ 991 secname = bfd_malloc (secname_length + 1); 992 secname[secname_length] = 0; 993 994 for (i = 0; i < secname_length / 4; i++) 995 { 996 if (bfd_bread (secname + i * 4, 4, abfd) != 4) 997 goto format_error_free; 998 999 if (secname[i * 4] == (char) LOP) 1000 { 1001 /* A bit of overkill, but we handle char 0x98 in a section name, 1002 and recognize misparsing. */ 1003 if (secname[i * 4 + 1] != LOP_QUOTE 1004 || bfd_bread (secname + i * 4, 4, abfd) != 4) 1005 /* Whoops. We thought this was a name, and now we found a 1006 non-lop_quote lopcode before we parsed the whole length of 1007 the name. Signal end-of-file in the same manner. */ 1008 goto format_error_free; 1009 } 1010 } 1011 1012 /* Get the section flags. */ 1013 if (bfd_bread (buf, 4, abfd) != 4 1014 || (buf[0] == LOP 1015 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1016 goto format_error_free; 1017 1018 flags = bfd_get_32 (abfd, buf); 1019 1020 /* Get the section length. */ 1021 if (bfd_bread (buf, 4, abfd) != 4 1022 || (buf[0] == LOP 1023 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1024 goto format_error_free; 1025 1026 section_length = (bfd_vma) bfd_get_32 (abfd, buf) << 32; 1027 1028 /* That's the first, high-part. Now get the low part. */ 1029 1030 if (bfd_bread (buf, 4, abfd) != 4 1031 || (buf[0] == LOP 1032 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1033 goto format_error_free; 1034 1035 section_length |= (bfd_vma) bfd_get_32 (abfd, buf); 1036 1037 /* Check the section length for sanity. */ 1038 if (section_length > MAX_ARTIFICIAL_SECTION_SIZE) 1039 goto format_error_free; 1040 1041 /* Get the section VMA. */ 1042 if (bfd_bread (buf, 4, abfd) != 4 1043 || (buf[0] == LOP 1044 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1045 goto format_error_free; 1046 1047 section_vma = (bfd_vma) bfd_get_32 (abfd, buf) << 32; 1048 1049 /* That's the first, high-part. Now get the low part. */ 1050 if (bfd_bread (buf, 4, abfd) != 4 1051 || (buf[0] == LOP 1052 && (buf[1] != LOP_QUOTE || bfd_bread (buf, 4, abfd) != 4))) 1053 goto format_error_free; 1054 1055 section_vma |= (bfd_vma) bfd_get_32 (abfd, buf); 1056 1057 sec = mmo_make_section (abfd, secname); 1058 free (secname); 1059 if (sec == NULL) 1060 goto format_error; 1061 1062 /* We allocate a buffer here for the advertised size, with head room for 1063 tetrabyte alignment. */ 1064 loc = bfd_zmalloc (section_length + 3 1065 + sizeof (struct mmo_data_list_struct)); 1066 if (loc == NULL) 1067 goto format_error; 1068 1069 /* Use a TETRA-rounded size for the allocated buffer; we set the 1070 "visible" section size below. */ 1071 loc->size = (section_length + 3) & ~3; 1072 1073 /* Add in the section flags we found to those bfd entered during this 1074 process and set the contents. */ 1075 if (! bfd_set_section_flags (abfd, sec, 1076 bfd_sec_flags_from_mmo_flags (flags) 1077 | bfd_get_section_flags (abfd, sec) 1078 | (section_length != 0 ? SEC_HAS_CONTENTS : 0)) 1079 || ! bfd_set_section_size (abfd, sec, sec->size + section_length) 1080 /* Set VMA only for the first occurrence. */ 1081 || (! sec->user_set_vma 1082 && ! bfd_set_section_vma (abfd, sec, section_vma))) 1083 { 1084 /* If we get an error for any of the calls above, signal more than 1085 just a format error for the spec section. */ 1086 return NULL; 1087 } 1088 1089 loc->next = NULL; 1090 if (mmo_section_data (sec)->tail != NULL) 1091 mmo_section_data (sec)->tail->next = loc; 1092 else 1093 mmo_section_data (sec)->head = loc; 1094 mmo_section_data (sec)->tail = loc; 1095 loc->where = section_vma; 1096 1097 return sec; 1098 1099 format_error_free: 1100 free (secname); 1101 format_error: 1102 if (bfd_seek (abfd, orig_pos, SEEK_SET) != 0) 1103 return NULL; 1104 1105 return mmo_get_generic_spec_data_section (abfd, spec_data_number); 1106 } 1107 1108 /* Read a byte, but read from file in multiples of 32-bit words. */ 1109 1110 static bfd_byte 1111 mmo_get_byte (bfd *abfd) 1112 { 1113 bfd_byte retval; 1114 1115 if (abfd->tdata.mmo_data->byte_no == 0) 1116 { 1117 if (! abfd->tdata.mmo_data->have_error 1118 && bfd_bread (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 1119 { 1120 abfd->tdata.mmo_data->have_error = TRUE; 1121 1122 /* A value somewhat safe against tripping on some inconsistency 1123 when mopping up after this error. */ 1124 return 128; 1125 } 1126 } 1127 1128 retval = abfd->tdata.mmo_data->buf[abfd->tdata.mmo_data->byte_no]; 1129 abfd->tdata.mmo_data->byte_no = (abfd->tdata.mmo_data->byte_no + 1) % 4; 1130 1131 return retval; 1132 } 1133 1134 /* Write a byte, in multiples of 32-bit words. */ 1135 1136 static void 1137 mmo_write_byte (bfd *abfd, bfd_byte value) 1138 { 1139 abfd->tdata.mmo_data->buf[(abfd->tdata.mmo_data->byte_no++ % 4)] = value; 1140 if ((abfd->tdata.mmo_data->byte_no % 4) == 0) 1141 { 1142 if (! abfd->tdata.mmo_data->have_error 1143 && bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 1144 abfd->tdata.mmo_data->have_error = TRUE; 1145 } 1146 } 1147 1148 /* Create a symbol. */ 1149 1150 static bfd_boolean 1151 mmo_create_symbol (bfd *abfd, const char *symname, bfd_vma addr, enum 1152 mmo_sym_type sym_type, unsigned int serno) 1153 { 1154 struct mmo_symbol *n; 1155 1156 n = (struct mmo_symbol *) bfd_alloc (abfd, sizeof (struct mmo_symbol)); 1157 if (n == NULL) 1158 return FALSE; 1159 1160 n->name = bfd_alloc (abfd, strlen (symname) + 1); 1161 if (n->name == NULL) 1162 return FALSE; 1163 1164 strcpy (n->name, symname); 1165 1166 n->value = addr; 1167 n->sym_type = sym_type; 1168 n->serno = serno; 1169 1170 if (abfd->tdata.mmo_data->symbols == NULL) 1171 abfd->tdata.mmo_data->symbols = n; 1172 else 1173 abfd->tdata.mmo_data->symtail->next = n; 1174 abfd->tdata.mmo_data->symtail = n; 1175 n->next = NULL; 1176 1177 ++abfd->symcount; 1178 1179 /* Check that :Main equals the last octa of the .MMIX.reg_contents 1180 section, as it's the one place we're sure to pass when reading a mmo 1181 object. For written objects, we do it while setting the symbol 1182 table. */ 1183 if (strcmp (symname, MMIX_START_SYMBOL_NAME) == 0 1184 && bfd_get_start_address (abfd) != addr) 1185 { 1186 (*_bfd_error_handler) 1187 (_("%s: invalid mmo file: initialization value for $255 is not `Main'\n"), 1188 bfd_get_filename (abfd)); 1189 bfd_set_error (bfd_error_bad_value); 1190 return FALSE; 1191 } 1192 1193 return TRUE; 1194 } 1195 1196 /* Read in symbols. */ 1197 1198 static bfd_boolean 1199 mmo_get_symbols (bfd *abfd) 1200 { 1201 /* 1202 INODE 1203 Symbol-table, mmo section mapping, File layout, mmo 1204 SUBSECTION 1205 Symbol table format 1206 1207 From mmixal.w (or really, the generated mmixal.tex) in 1208 @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz}): 1209 ``Symbols are stored and retrieved by means of a @samp{ternary 1210 search trie}, following ideas of Bentley and Sedgewick. (See 1211 ACM--SIAM Symp.@: on Discrete Algorithms @samp{8} (1997), 360--369; 1212 R.@:Sedgewick, @samp{Algorithms in C} (Reading, Mass.@: 1213 Addison--Wesley, 1998), @samp{15.4}.) Each trie node stores a 1214 character, and there are branches to subtries for the cases where 1215 a given character is less than, equal to, or greater than the 1216 character in the trie. There also is a pointer to a symbol table 1217 entry if a symbol ends at the current node.'' 1218 1219 So it's a tree encoded as a stream of bytes. The stream of bytes 1220 acts on a single virtual global symbol, adding and removing 1221 characters and signalling complete symbol points. Here, we read 1222 the stream and create symbols at the completion points. 1223 1224 First, there's a control byte <<m>>. If any of the listed bits 1225 in <<m>> is nonzero, we execute what stands at the right, in 1226 the listed order: 1227 1228 | (MMO3_LEFT) 1229 | 0x40 - Traverse left trie. 1230 | (Read a new command byte and recurse.) 1231 | 1232 | (MMO3_SYMBITS) 1233 | 0x2f - Read the next byte as a character and store it in the 1234 | current character position; increment character position. 1235 | Test the bits of <<m>>: 1236 | 1237 | (MMO3_WCHAR) 1238 | 0x80 - The character is 16-bit (so read another byte, 1239 | merge into current character. 1240 | 1241 | (MMO3_TYPEBITS) 1242 | 0xf - We have a complete symbol; parse the type, value 1243 | and serial number and do what should be done 1244 | with a symbol. The type and length information 1245 | is in j = (m & 0xf). 1246 | 1247 | (MMO3_REGQUAL_BITS) 1248 | j == 0xf: A register variable. The following 1249 | byte tells which register. 1250 | j <= 8: An absolute symbol. Read j bytes as the 1251 | big-endian number the symbol equals. 1252 | A j = 2 with two zero bytes denotes an 1253 | unknown symbol. 1254 | j > 8: As with j <= 8, but add (0x20 << 56) 1255 | to the value in the following j - 8 1256 | bytes. 1257 | 1258 | Then comes the serial number, as a variant of 1259 | uleb128, but better named ubeb128: 1260 | Read bytes and shift the previous value left 7 1261 | (multiply by 128). Add in the new byte, repeat 1262 | until a byte has bit 7 set. The serial number 1263 | is the computed value minus 128. 1264 | 1265 | (MMO3_MIDDLE) 1266 | 0x20 - Traverse middle trie. (Read a new command byte 1267 | and recurse.) Decrement character position. 1268 | 1269 | (MMO3_RIGHT) 1270 | 0x10 - Traverse right trie. (Read a new command byte and 1271 | recurse.) 1272 1273 Let's look again at the <<lop_stab>> for the trivial file 1274 (@pxref{File layout}). 1275 1276 | 0x980b0000 - lop_stab for ":Main" = 0, serial 1. 1277 | 0x203a4040 1278 | 0x10404020 1279 | 0x4d206120 1280 | 0x69016e00 1281 | 0x81000000 1282 1283 This forms the trivial trie (note that the path between ``:'' and 1284 ``M'' is redundant): 1285 1286 | 203a ":" 1287 | 40 / 1288 | 40 / 1289 | 10 \ 1290 | 40 / 1291 | 40 / 1292 | 204d "M" 1293 | 2061 "a" 1294 | 2069 "i" 1295 | 016e "n" is the last character in a full symbol, and 1296 | with a value represented in one byte. 1297 | 00 The value is 0. 1298 | 81 The serial number is 1. */ 1299 1300 bfd_byte m = mmo_get_byte (abfd); 1301 1302 /* Check first if we have a bad hair day. */ 1303 if (abfd->tdata.mmo_data->have_error) 1304 return FALSE; 1305 1306 if (m & MMO3_LEFT) 1307 /* Traverse left trie. */ 1308 mmo_get_symbols (abfd); 1309 1310 if (m & MMO3_SYMBITS) 1311 { 1312 bfd_byte c = mmo_get_byte (abfd); 1313 bfd_byte j = m & MMO3_TYPEBITS; 1314 bfd_vma addr = 0; 1315 enum mmo_sym_type sym_type; 1316 unsigned int serno = 0; 1317 bfd_byte k; 1318 1319 if (m & MMO3_WCHAR) 1320 { 1321 bfd_byte c2 = mmo_get_byte (abfd); 1322 1323 /* A two-byte character. We can't grok this, but neither can 1324 mmotype, for other cases than the second byte being zero. */ 1325 1326 if (c != 0) 1327 { 1328 abfd->tdata.mmo_data->lop_stab_symbol 1329 [abfd->tdata.mmo_data->symbol_position] = 0; 1330 1331 (*_bfd_error_handler) 1332 (_("%s: unsupported wide character sequence" 1333 " 0x%02X 0x%02X after symbol name starting with `%s'\n"), 1334 bfd_get_filename (abfd), c, c2, 1335 abfd->tdata.mmo_data->lop_stab_symbol); 1336 bfd_set_error (bfd_error_bad_value); 1337 abfd->tdata.mmo_data->have_error = TRUE; 1338 return FALSE; 1339 } 1340 else 1341 c = c2; 1342 } 1343 1344 abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position++] = c; 1345 abfd->tdata.mmo_data->lop_stab_symbol[abfd->tdata.mmo_data->symbol_position] = 0; 1346 1347 if (j & MMO3_REGQUAL_BITS) 1348 { 1349 if (j == MMO3_REGQUAL_BITS) 1350 { 1351 sym_type = mmo_reg_sym; 1352 addr = mmo_get_byte (abfd); 1353 } 1354 else if (j <= 8) 1355 { 1356 unsigned int i; 1357 1358 for (i = 0; i < j; i++) 1359 addr = (addr << 8) + mmo_get_byte (abfd); 1360 1361 if (addr == 0 && j == MMO3_UNDEF) 1362 sym_type = mmo_undef_sym; 1363 else 1364 sym_type = mmo_abs_sym; 1365 } 1366 else 1367 { 1368 unsigned int i; 1369 1370 for (i = MMO3_DATA; i < j; i++) 1371 addr = (addr << 8) + mmo_get_byte (abfd); 1372 1373 addr += (bfd_vma) 0x20 << 56; 1374 sym_type = mmo_data_sym; 1375 } 1376 1377 /* Get the serial number. */ 1378 do 1379 { 1380 k = mmo_get_byte (abfd); 1381 serno = (serno << 7) + k; 1382 } 1383 while (k < 128); 1384 serno -= 128; 1385 1386 /* Got it. Now enter it. Skip a leading ":". */ 1387 if (! abfd->tdata.mmo_data->have_error 1388 && ! mmo_create_symbol (abfd, 1389 abfd->tdata.mmo_data->lop_stab_symbol 1390 + 1, 1391 addr, sym_type, serno)) 1392 abfd->tdata.mmo_data->have_error = TRUE; 1393 } 1394 1395 if (m & MMO3_MIDDLE) 1396 /* Traverse middle trie. */ 1397 mmo_get_symbols (abfd); 1398 1399 abfd->tdata.mmo_data->symbol_position--; 1400 } 1401 1402 if (m & MMO3_RIGHT) 1403 /* Traverse right trie. */ 1404 mmo_get_symbols (abfd); 1405 1406 return ! abfd->tdata.mmo_data->have_error; 1407 } 1408 1409 /* Get the location of memory area [VMA..VMA + SIZE - 1], which we think 1410 is in section SEC. Adjust and reallocate zero-initialized contents. 1411 If there's new contents, allocate to the next multiple of 1412 MMO_SEC_CONTENTS_CHUNK_SIZE. */ 1413 1414 static INLINE bfd_byte * 1415 mmo_get_loc (asection *sec, bfd_vma vma, int size) 1416 { 1417 bfd_size_type allocated_size; 1418 struct mmo_section_data_struct *sdatap = mmo_section_data (sec); 1419 struct mmo_data_list_struct *datap = sdatap->head; 1420 struct mmo_data_list_struct *entry; 1421 1422 /* First search the list to see if we have the requested chunk in one 1423 piece, or perhaps if we have a suitable chunk with room to fit. */ 1424 for (; datap != NULL; datap = datap->next) 1425 { 1426 if (datap->where <= vma 1427 && datap->where + datap->size >= vma + size) 1428 return datap->data + vma - datap->where; 1429 else if (datap->where <= vma 1430 && datap->where + datap->allocated_size >= vma + size 1431 /* Only munch on the "allocated size" if it does not 1432 overlap the next chunk. */ 1433 && (datap->next == NULL || datap->next->where >= vma + size)) 1434 { 1435 /* There was room allocated, but the size wasn't set to include 1436 it. Do that now. */ 1437 datap->size += (vma + size) - (datap->where + datap->size); 1438 1439 /* Update the section size. This happens only if we update the 1440 32-bit-aligned chunk size. Callers that have 1441 non-32-bit-aligned sections should do all allocation and 1442 size-setting by themselves or at least set the section size 1443 after the last allocating call to this function. */ 1444 if (vma + size > sec->vma + sec->size) 1445 sec->size += (vma + size) - (sec->vma + sec->size); 1446 1447 return datap->data + vma - datap->where; 1448 } 1449 } 1450 1451 /* Not found; allocate a new block. First check in case we get a 1452 request for a size split up over several blocks; we'll have to return 1453 NULL for those cases, requesting the caller to split up the request. 1454 Requests with an address aligned on MMO_SEC_CONTENTS_CHUNK_SIZE bytes and 1455 for no more than MMO_SEC_CONTENTS_CHUNK_SIZE will always get resolved. */ 1456 1457 for (datap = sdatap->head; datap != NULL; datap = datap->next) 1458 if ((datap->where <= vma && datap->where + datap->size > vma) 1459 || (datap->where < vma + size 1460 && datap->where + datap->size >= vma + size)) 1461 return NULL; 1462 1463 allocated_size 1464 = (size + MMO_SEC_CONTENTS_CHUNK_SIZE - 1) & ~(MMO_SEC_CONTENTS_CHUNK_SIZE - 1); 1465 entry = (mmo_data_list_type *) 1466 bfd_zalloc (sec->owner, sizeof (mmo_data_list_type) + allocated_size); 1467 if (entry == NULL) 1468 return NULL; 1469 entry->where = vma; 1470 entry->size = size; 1471 entry->allocated_size = allocated_size; 1472 1473 datap = sdatap->head; 1474 1475 /* Sort the records by address. Optimize for the common case of adding 1476 a record to the end of the list. */ 1477 if (sdatap->tail != NULL && entry->where >= sdatap->tail->where) 1478 { 1479 sdatap->tail->next = entry; 1480 entry->next = NULL; 1481 sdatap->tail = entry; 1482 } 1483 else 1484 { 1485 mmo_data_list_type **look; 1486 for (look = &sdatap->head; 1487 *look != NULL && (*look)->where < entry->where; 1488 look = &(*look)->next) 1489 ; 1490 entry->next = *look; 1491 *look = entry; 1492 if (entry->next == NULL) 1493 { 1494 sdatap->tail = entry; 1495 1496 /* We get here for the first time (at other times too) for this 1497 section. Say we have contents. */ 1498 if (! bfd_set_section_flags (sec->owner, sec, 1499 bfd_get_section_flags (sec->owner, sec) 1500 | SEC_HAS_CONTENTS)) 1501 return NULL; 1502 } 1503 } 1504 1505 /* Update the section size. This happens only when we add contents and 1506 re-size as we go. The section size will then be aligned to 32 bits. */ 1507 if (vma + size > sec->vma + sec->size) 1508 sec->size += (vma + size) - (sec->vma + sec->size); 1509 return entry->data; 1510 } 1511 1512 /* Set sizes once we've read in all sections. */ 1513 1514 static void 1515 mmo_map_set_sizes (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, 1516 void *ignored ATTRIBUTE_UNUSED) 1517 { 1518 sec->lma = sec->vma; 1519 } 1520 1521 /* Read the mmo file and turn it into sections. */ 1522 1523 static bfd_boolean 1524 mmo_scan (bfd *abfd) 1525 { 1526 unsigned int i; 1527 unsigned int lineno = 1; 1528 bfd_boolean error = FALSE; 1529 bfd_vma vma = 0; 1530 asection *sec = bfd_make_section_old_way (abfd, MMO_TEXT_SECTION_NAME); 1531 asection *non_spec_sec = NULL; 1532 bfd_vma non_spec_vma = 0; 1533 char *current_filename = NULL; 1534 bfd_size_type nbytes_read = 0; 1535 /* Buffer with room to read a 64-bit value. */ 1536 bfd_byte buf[8]; 1537 long stab_loc = -1; 1538 char *file_names[256]; 1539 1540 memset (file_names, 0, sizeof (file_names)); 1541 1542 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) 1543 goto error_return; 1544 1545 while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) 1546 { 1547 if (buf[0] == LOP) 1548 { 1549 unsigned int y = bfd_get_8 (abfd, buf + 2); 1550 unsigned int z = bfd_get_8 (abfd, buf + 3); 1551 1552 /* Change back to the original section for lopcodes other 1553 than LOP_QUOTE that comes after a LOP_SPEC. */ 1554 if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) 1555 && non_spec_sec != NULL) 1556 { 1557 sec = non_spec_sec; 1558 vma = non_spec_vma; 1559 non_spec_sec = NULL; 1560 } 1561 1562 switch (buf[1]) 1563 { 1564 default: 1565 (*_bfd_error_handler) 1566 (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), 1567 bfd_get_filename (abfd), buf[1]); 1568 bfd_set_error (bfd_error_bad_value); 1569 goto error_return; 1570 1571 case LOP_QUOTE: 1572 /* Quote the next 32-bit word. */ 1573 if (y != 0 || z != 1) 1574 { 1575 (*_bfd_error_handler) 1576 (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), 1577 bfd_get_filename (abfd), y*256+z); 1578 bfd_set_error (bfd_error_bad_value); 1579 goto error_return; 1580 } 1581 if (bfd_bread (buf, 4, abfd) != 4) 1582 goto error_return; 1583 1584 mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); 1585 vma += 4; 1586 vma &= ~3; 1587 lineno++; 1588 break; 1589 1590 case LOP_LOC: 1591 /* Set vma (and section). */ 1592 vma = (bfd_vma) y << 56; 1593 if (z == 1) 1594 { 1595 /* Get a 32-bit value. */ 1596 if (bfd_bread (buf, 4, abfd) != 4) 1597 goto error_return; 1598 1599 vma += bfd_get_32 (abfd, buf); 1600 } 1601 else if (z == 2) 1602 { 1603 /* Get a 64-bit value. */ 1604 if (bfd_bread (buf, 8, abfd) != 8) 1605 goto error_return; 1606 1607 vma += bfd_get_64 (abfd, buf); 1608 } 1609 else 1610 { 1611 (*_bfd_error_handler) 1612 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), 1613 bfd_get_filename (abfd), z); 1614 bfd_set_error (bfd_error_bad_value); 1615 goto error_return; 1616 } 1617 1618 sec = mmo_decide_section (abfd, vma); 1619 if (sec == NULL) 1620 goto error_return; 1621 break; 1622 1623 case LOP_SKIP: 1624 /* Move forward within the same section. */ 1625 vma += y * 256 + z; 1626 1627 sec = mmo_decide_section (abfd, vma); 1628 if (sec == NULL) 1629 goto error_return; 1630 break; 1631 1632 case LOP_FIXO: 1633 /* A fixup: Store the current vma somewhere. Position using 1634 same format as LOP_LOC. */ 1635 { 1636 bfd_vma p = (bfd_vma) y << 56; 1637 asection *fixosec; 1638 1639 if (z == 1) 1640 { 1641 /* Get a 32-bit value. */ 1642 if (bfd_bread (buf, 4, abfd) != 4) 1643 goto error_return; 1644 1645 p += bfd_get_32 (abfd, buf); 1646 } 1647 else if (z == 2) 1648 { 1649 /* Get a 64-bit value. */ 1650 if (bfd_bread (buf, 8, abfd) != 8) 1651 goto error_return; 1652 1653 p += bfd_get_64 (abfd, buf); 1654 } 1655 else 1656 { 1657 (*_bfd_error_handler) 1658 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), 1659 bfd_get_filename (abfd), z); 1660 bfd_set_error (bfd_error_bad_value); 1661 goto error_return; 1662 } 1663 1664 /* The section where we store this address might be a 1665 different one than the current section. */ 1666 fixosec = mmo_decide_section (abfd, p); 1667 if (fixosec == NULL) 1668 goto error_return; 1669 mmo_xore_64 (fixosec, p, vma); 1670 } 1671 break; 1672 1673 case LOP_FIXR: 1674 /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ 1675 { 1676 unsigned int yz = (y * 256 + z); 1677 bfd_vma p = vma + 2 - 4 * yz; 1678 asection *fixrsec = mmo_decide_section (abfd, p); 1679 if (fixrsec == NULL) 1680 goto error_return; 1681 mmo_xore_16 (fixrsec, p, yz); 1682 } 1683 break; 1684 1685 case LOP_FIXRX: 1686 /* A fixup, similar to lop_fixr, but taking larger numbers 1687 and can change branches into the opposite direction 1688 (gasp!). */ 1689 { 1690 bfd_vma delta; 1691 bfd_vma p; 1692 asection *fixrsec; 1693 1694 if (y != 0) 1695 { 1696 (*_bfd_error_handler) 1697 (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), 1698 bfd_get_filename (abfd), y); 1699 bfd_set_error (bfd_error_bad_value); 1700 goto error_return; 1701 } 1702 1703 if (z != 16 && z != 24) 1704 { 1705 (*_bfd_error_handler) 1706 (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), 1707 bfd_get_filename (abfd), z); 1708 bfd_set_error (bfd_error_bad_value); 1709 goto error_return; 1710 } 1711 1712 /* Get the next 32-bit value. */ 1713 if (bfd_bread (buf, 4, abfd) != 4) 1714 goto error_return; 1715 1716 delta = bfd_get_32 (abfd, buf); 1717 1718 /* Do an, ehm, involved calculation for the location of 1719 the fixup. See mmixal documentation for a verbose 1720 explanation. We follow it verbosely here for the 1721 readers delight. */ 1722 if (buf[0] == 0) 1723 p = vma - 4 * delta; 1724 else if (buf[0] == 1) 1725 p = vma - 4 * ((delta & 0xffffff) - (1 << z)); 1726 else 1727 { 1728 (*_bfd_error_handler) 1729 (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), 1730 bfd_get_filename (abfd), buf[0]); 1731 bfd_set_error (bfd_error_bad_value); 1732 goto error_return; 1733 } 1734 1735 fixrsec = mmo_decide_section (abfd, vma); 1736 if (fixrsec == NULL) 1737 goto error_return; 1738 mmo_xore_32 (fixrsec, p, delta); 1739 } 1740 break; 1741 1742 case LOP_FILE: 1743 /* Set current file and perhaps the file name. Reset line 1744 number. */ 1745 if (z != 0) 1746 { 1747 char *fname = bfd_malloc (z * 4 + 1); 1748 1749 if (fname == NULL) 1750 { 1751 (*_bfd_error_handler) 1752 (_("%s: cannot allocate file name for file number %d, %d bytes\n"), 1753 bfd_get_filename (abfd), y, z * 4 + 1); 1754 bfd_set_error (bfd_error_system_call); 1755 goto error_return; 1756 } 1757 1758 fname[z * 4] = 0; 1759 1760 for (i = 0; i < z; i++) 1761 { 1762 if (bfd_bread (fname + i * 4, 4, abfd) != 4) 1763 { 1764 free (fname); 1765 goto error_return; 1766 } 1767 } 1768 1769 if (file_names[y] != NULL) 1770 { 1771 (*_bfd_error_handler) 1772 (_("%s: invalid mmo file: file number %d `%s'," 1773 " was already entered as `%s'\n"), 1774 bfd_get_filename (abfd), y, fname, file_names[y]); 1775 bfd_set_error (bfd_error_bad_value); 1776 goto error_return; 1777 } 1778 1779 file_names[y] = fname; 1780 } 1781 1782 if (file_names[y] == NULL) 1783 { 1784 (*_bfd_error_handler) 1785 (_("%s: invalid mmo file: file name for number %d" 1786 " was not specified before use\n"), 1787 bfd_get_filename (abfd), y); 1788 bfd_set_error (bfd_error_bad_value); 1789 goto error_return; 1790 } 1791 1792 current_filename = file_names[y]; 1793 lineno = 0; 1794 break; 1795 1796 case LOP_LINE: 1797 /* Set line number. */ 1798 lineno = y * 256 + z; 1799 /* FIXME: Create a sequence of mmo-specific line number 1800 entries for each section, then translate into canonical 1801 format. */ 1802 break; 1803 1804 case LOP_SPEC: 1805 /* Special data follows until the next non-lop_quote 1806 lopcode. */ 1807 non_spec_sec = sec; 1808 non_spec_vma = vma; 1809 sec = mmo_get_spec_section (abfd, y * 256 + z); 1810 if (sec == NULL) 1811 goto error_return; 1812 1813 vma = sec->vma; 1814 break; 1815 1816 case LOP_PRE: 1817 { 1818 /* We ignore header information, except we read in the 1819 creation time from the first 32-bit word with the time 1820 in seconds since era. */ 1821 if (z >= 1 1822 && bfd_bread (abfd->tdata.mmo_data->created, 4, 1823 abfd) != 4) 1824 goto error_return; 1825 1826 for (i = 1; i < z; i++) 1827 if (bfd_bread (buf, 4, abfd) != 4) 1828 goto error_return; 1829 } 1830 break; 1831 1832 case LOP_POST: 1833 /* This tells of the contents of registers $Z..$255 at 1834 startup. We make a section out of it, with VMA = Z * 8, 1835 but only if Z != 255 or the contents is non-zero. */ 1836 { 1837 asection *rsec; 1838 bfd_byte *loc; 1839 bfd_vma first_octa; 1840 bfd_vma startaddr_octa; 1841 1842 /* Read first octaword outside loop to simplify logic when 1843 excluding the Z == 255, octa == 0 case. */ 1844 if (bfd_bread (buf, 8, abfd) != 8) 1845 goto error_return; 1846 1847 first_octa = bfd_get_64 (abfd, buf); 1848 1849 /* Don't emit contents for the trivial case which is 1850 always present; $255 pointing to Main. */ 1851 if (z != 255) 1852 { 1853 rsec 1854 = bfd_make_section_old_way (abfd, 1855 MMIX_REG_CONTENTS_SECTION_NAME); 1856 rsec->flags |= SEC_LINKER_CREATED; 1857 rsec->vma = z * 8; 1858 loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); 1859 bfd_put_64 (abfd, first_octa, loc); 1860 1861 for (i = z + 1; i < 255; i++) 1862 { 1863 if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) 1864 goto error_return; 1865 } 1866 1867 /* Read out the last octabyte, and use it to set the 1868 start address. */ 1869 if (bfd_bread (buf, 8, abfd) != 8) 1870 goto error_return; 1871 1872 startaddr_octa = bfd_get_64 (abfd, buf); 1873 } 1874 else 1875 startaddr_octa = first_octa; 1876 1877 if (! bfd_set_start_address (abfd, startaddr_octa)) 1878 { 1879 /* Currently this can't fail, but this should handle 1880 future failures. */ 1881 bfd_set_error (bfd_error_bad_value); 1882 goto error_return; 1883 } 1884 } 1885 break; 1886 1887 case LOP_STAB: 1888 /* We read in the symbols now, not later. */ 1889 if (y != 0 || z != 0) 1890 { 1891 (*_bfd_error_handler) 1892 (_("%s: invalid mmo file: fields y and z of lop_stab" 1893 " non-zero, y: %d, z: %d\n"), 1894 bfd_get_filename (abfd), y, z); 1895 bfd_set_error (bfd_error_bad_value); 1896 goto error_return; 1897 } 1898 1899 /* Save the location, so we can check that YZ in the LOP_END 1900 is correct. */ 1901 stab_loc = bfd_tell (abfd); 1902 1903 /* It's not said that an MMO can be without symbols (though 1904 mmixal will refuse to assemble files without Main), but 1905 it seems it would still be a valid mmo-file, so allow it. 1906 We detect the absence of a symbol area in that the upper 1907 limit is computed (from the lop_end YZ field) as 0. 1908 Don't call mmo_get_symbols; it can only detect the end of 1909 a valid symbol trie, not the absence of one. */ 1910 if (abfd->tdata.mmo_data->max_symbol_length != 0 1911 && ! mmo_get_symbols (abfd)) 1912 goto error_return; 1913 break; 1914 1915 case LOP_END: 1916 { 1917 /* This must be the last 32-bit word in an mmo file. 1918 Let's find out. */ 1919 struct stat statbuf; 1920 long curpos = bfd_tell (abfd); 1921 1922 if (bfd_stat (abfd, &statbuf) < 0) 1923 goto error_return; 1924 1925 if (statbuf.st_size != curpos) 1926 { 1927 (*_bfd_error_handler) 1928 (_("%s: invalid mmo file: lop_end not last item in" 1929 " file\n"), 1930 bfd_get_filename (abfd)); 1931 bfd_set_error (bfd_error_bad_value); 1932 goto error_return; 1933 } 1934 1935 /* Check that the YZ field is right. Subtract the size of 1936 this LOP_END in the calculation; YZ does not include 1937 it. */ 1938 if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) 1939 { 1940 (*_bfd_error_handler) 1941 (_("%s: invalid mmo file: YZ of lop_end (%ld)" 1942 " not equal to the number of tetras to the preceding" 1943 " lop_stab (%ld)\n"), 1944 bfd_get_filename (abfd), (long) (y * 256 + z), 1945 (curpos - stab_loc - 4)/4); 1946 bfd_set_error (bfd_error_bad_value); 1947 goto error_return; 1948 } 1949 1950 bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); 1951 goto done; 1952 } 1953 } 1954 } 1955 else 1956 { 1957 /* This wasn't a lopcode, so store it in the current section. */ 1958 mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); 1959 vma += 4; 1960 vma &= ~3; 1961 lineno++; 1962 } 1963 } 1964 1965 /* We know this file is a multiple of four bytes (checked in 1966 mmo_object_p), so if we got something other than 0, this was a bad 1967 file (although it's more likely we'll get 0 in that case too). 1968 If we got end-of-file, then there was no lop_stab, so the file has 1969 invalid format. */ 1970 1971 if (nbytes_read != 0) 1972 bfd_set_error (bfd_error_system_call); 1973 else 1974 bfd_set_error (bfd_error_bad_value); 1975 1976 error_return: 1977 error = TRUE; 1978 done: 1979 /* Mark the .text and .data section with their normal attribute if they 1980 contain anything. This is not redundant wrt. mmo_decide_section, 1981 since that code might never execute, and conversely the alloc+code 1982 section flags must be set then. */ 1983 sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 1984 if (sec != NULL 1985 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 1986 && ! bfd_set_section_flags (abfd, sec, 1987 bfd_get_section_flags (abfd, sec) 1988 | SEC_ALLOC | SEC_LOAD | SEC_CODE)) 1989 error = TRUE; 1990 1991 sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 1992 if (sec != NULL 1993 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 1994 && ! bfd_set_section_flags (abfd, sec, 1995 bfd_get_section_flags (abfd, sec) 1996 | SEC_ALLOC | SEC_LOAD)) 1997 error = TRUE; 1998 1999 /* Free whatever resources we took. */ 2000 for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) 2001 if (file_names[i]) 2002 free (file_names[i]); 2003 return ! error; 2004 } 2005 2006 /* A hook to set up object file dependent section information. For mmo, 2007 we point out the shape of allocated section contents. */ 2008 2009 static bfd_boolean 2010 mmo_new_section_hook (bfd *abfd ATTRIBUTE_UNUSED, asection *newsect) 2011 { 2012 /* We zero-fill all fields and assume NULL is represented by an all 2013 zero-bit pattern. */ 2014 newsect->used_by_bfd = 2015 bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); 2016 2017 if (!newsect->used_by_bfd) 2018 return FALSE; 2019 2020 /* Always align to at least 32-bit words. */ 2021 newsect->alignment_power = 2; 2022 return TRUE; 2023 } 2024 2025 /* We already have section contents loaded for sections that have 2026 contents. */ 2027 2028 static bfd_boolean 2029 mmo_get_section_contents (bfd *abfd ATTRIBUTE_UNUSED, 2030 asection *sec, 2031 void * location, 2032 file_ptr offset, 2033 bfd_size_type bytes_to_do) 2034 { 2035 /* Iterate over diminishing chunk sizes, copying contents, like 2036 mmo_set_section_contents. */ 2037 while (bytes_to_do) 2038 { 2039 /* A minor song-and-dance to make sure we're not bitten by the 2040 distant possibility of the cast from bfd_vma to int making the 2041 chunk zero-sized. */ 2042 int chunk_size 2043 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; 2044 bfd_byte *loc; 2045 2046 do 2047 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); 2048 while (loc == NULL && (chunk_size /= 2) != 0); 2049 2050 if (chunk_size == 0) 2051 return FALSE; 2052 2053 memcpy (location, loc, chunk_size); 2054 2055 location += chunk_size; 2056 bytes_to_do -= chunk_size; 2057 offset += chunk_size; 2058 } 2059 return TRUE; 2060 } 2061 2062 /* Return the amount of memory needed to read the symbol table. */ 2063 2064 static long 2065 mmo_get_symtab_upper_bound (bfd *abfd) 2066 { 2067 return (abfd->symcount + 1) * sizeof (asymbol *); 2068 } 2069 2070 /* Sort mmo symbols by serial number. */ 2071 2072 static int 2073 mmo_sort_mmo_symbols (const void *arg1, const void *arg2) 2074 { 2075 const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1; 2076 const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2; 2077 2078 /* Sort by serial number first. */ 2079 if (sym1->serno < sym2->serno) 2080 return -1; 2081 else if (sym1->serno > sym2->serno) 2082 return 1; 2083 2084 /* Then sort by address of the table entries. */ 2085 return ((const char *) arg1 - (const char *) arg2); 2086 } 2087 2088 /* Translate the symbol table. */ 2089 2090 static long 2091 mmo_canonicalize_symtab (bfd *abfd, asymbol **alocation) 2092 { 2093 unsigned int symcount = bfd_get_symcount (abfd); 2094 asymbol *csymbols; 2095 unsigned int i; 2096 2097 csymbols = abfd->tdata.mmo_data->csymbols; 2098 if (csymbols == NULL) 2099 { 2100 asymbol *c; 2101 struct mmo_symbol *s; 2102 struct mmo_symbol **msp; 2103 2104 /* First we store the symbols into the table we'll return, then we 2105 qsort it on the serial number, with secondary on the address of 2106 the symbol, to preserve order if there would be non-unique serial 2107 numbers. */ 2108 for (s = abfd->tdata.mmo_data->symbols, 2109 msp = (struct mmo_symbol **) alocation; 2110 s != NULL; 2111 s = s->next, ++msp) 2112 *msp = s; 2113 2114 *msp = NULL; 2115 2116 qsort (alocation, symcount, sizeof (struct mmo_symbol *), 2117 mmo_sort_mmo_symbols); 2118 2119 csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); 2120 if (csymbols == NULL && symcount != 0) 2121 return FALSE; 2122 abfd->tdata.mmo_data->csymbols = csymbols; 2123 2124 for (msp = (struct mmo_symbol **) alocation, c = csymbols; 2125 *msp != NULL; 2126 msp++, ++c) 2127 { 2128 s = *msp; 2129 c->the_bfd = abfd; 2130 c->name = s->name; 2131 c->value = s->value; 2132 c->flags = BSF_GLOBAL; 2133 2134 if (s->sym_type == mmo_data_sym) 2135 { 2136 c->section 2137 = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 2138 2139 if (c->section == NULL) 2140 c->section = bfd_abs_section_ptr; 2141 else 2142 c->value -= c->section->vma; 2143 } 2144 else if (s->sym_type == mmo_undef_sym) 2145 c->section = bfd_und_section_ptr; 2146 else if (s->sym_type == mmo_reg_sym) 2147 { 2148 c->section 2149 = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); 2150 c->section->flags |= SEC_LINKER_CREATED; 2151 } 2152 else 2153 { 2154 asection *textsec 2155 = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 2156 asection *datasec; 2157 2158 if (textsec != NULL 2159 && c->value >= textsec->vma 2160 && c->value <= textsec->vma + textsec->size) 2161 { 2162 c->section = textsec; 2163 c->value -= c->section->vma; 2164 } 2165 /* In mmo, symbol types depend on the VMA. Therefore, if 2166 the data section isn't within the usual bounds, its 2167 symbols are marked as absolute. Correct that. This 2168 means we can't have absolute symbols with values matching 2169 data section addresses, but we also can't have with 2170 absolute symbols with values matching text section 2171 addresses. For such needs, use the ELF format. */ 2172 else if ((datasec 2173 = bfd_get_section_by_name (abfd, 2174 MMO_DATA_SECTION_NAME)) 2175 != NULL 2176 && c->value >= datasec->vma 2177 && c->value <= datasec->vma + datasec->size) 2178 { 2179 c->section = datasec; 2180 c->value -= c->section->vma; 2181 } 2182 else 2183 c->section = bfd_abs_section_ptr; 2184 } 2185 2186 c->udata.p = NULL; 2187 } 2188 } 2189 2190 /* Last, overwrite the incoming table with the right-type entries. */ 2191 for (i = 0; i < symcount; i++) 2192 *alocation++ = csymbols++; 2193 *alocation = NULL; 2194 2195 return symcount; 2196 } 2197 2198 /* Get information about a symbol. */ 2199 2200 static void 2201 mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2202 asymbol *symbol, symbol_info *ret) 2203 { 2204 bfd_symbol_info (symbol, ret); 2205 } 2206 2207 static void 2208 mmo_print_symbol (bfd *abfd, void *afile, asymbol *symbol, 2209 bfd_print_symbol_type how) 2210 { 2211 FILE *file = (FILE *) afile; 2212 2213 switch (how) 2214 { 2215 case bfd_print_symbol_name: 2216 fprintf (file, "%s", symbol->name); 2217 break; 2218 default: 2219 bfd_print_symbol_vandf (abfd, file, symbol); 2220 2221 fprintf (file, " %-5s %s", 2222 symbol->section->name, 2223 symbol->name); 2224 } 2225 } 2226 2227 /* We can't map a file directly into executable code, so the 2228 size of header information is irrelevant. */ 2229 2230 static int 2231 mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, 2232 bfd_boolean exec ATTRIBUTE_UNUSED) 2233 { 2234 return 0; 2235 } 2236 2237 /* Write the (section-neutral) file preamble. */ 2238 2239 static bfd_boolean 2240 mmo_internal_write_header (bfd *abfd) 2241 { 2242 const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; 2243 2244 if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) 2245 return FALSE; 2246 2247 /* Copy creation time of original file. */ 2248 if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) 2249 return FALSE; 2250 2251 return TRUE; 2252 } 2253 2254 /* Write the LOP_POST record, with global register initializations. 2255 Z is the Z field of the LOP_POST, corresponding to 255 - number of 2256 registers at DATA. The Z = 255 field is filled in with the 2257 start-address. */ 2258 2259 static bfd_boolean 2260 mmo_internal_write_post (bfd *abfd, int z, asection *sec) 2261 { 2262 int i; 2263 bfd_byte buf[8]; 2264 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); 2265 2266 for (i = z; i < 255; i++) 2267 { 2268 bfd_byte *data = mmo_get_loc (sec, i * 8, 8); 2269 2270 if (bfd_bwrite (data, 8, abfd) != 8) 2271 return FALSE; 2272 } 2273 2274 /* For Z == $255, we always emit the start location; supposedly Main, 2275 but we have it handy at bfd_get_start_address. If we're called with 2276 Z == 255, don't assume DATA is valid. */ 2277 bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); 2278 2279 return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8; 2280 } 2281 2282 /* Translate to and from BFD flags. This is to make sure that we don't 2283 get bitten by BFD flag number changes. */ 2284 2285 static flagword 2286 mmo_sec_flags_from_bfd_flags (flagword flags) 2287 { 2288 flagword oflags = 0; 2289 2290 if (flags & SEC_ALLOC) 2291 oflags |= MMO_SEC_ALLOC; 2292 if (flags & SEC_LOAD) 2293 oflags |= MMO_SEC_LOAD; 2294 if (flags & SEC_RELOC) 2295 oflags |= MMO_SEC_RELOC; 2296 if (flags & SEC_READONLY) 2297 oflags |= MMO_SEC_READONLY; 2298 if (flags & SEC_CODE) 2299 oflags |= MMO_SEC_CODE; 2300 if (flags & SEC_DATA) 2301 oflags |= MMO_SEC_DATA; 2302 if (flags & SEC_NEVER_LOAD) 2303 oflags |= MMO_SEC_NEVER_LOAD; 2304 if (flags & SEC_IS_COMMON) 2305 oflags |= MMO_SEC_IS_COMMON; 2306 if (flags & SEC_DEBUGGING) 2307 oflags |= MMO_SEC_DEBUGGING; 2308 2309 return oflags; 2310 } 2311 2312 static flagword 2313 bfd_sec_flags_from_mmo_flags (flagword flags) 2314 { 2315 flagword oflags = 0; 2316 2317 if (flags & MMO_SEC_ALLOC) 2318 oflags |= SEC_ALLOC; 2319 if (flags & MMO_SEC_LOAD) 2320 oflags |= SEC_LOAD; 2321 if (flags & MMO_SEC_RELOC) 2322 oflags |= SEC_RELOC; 2323 if (flags & MMO_SEC_READONLY) 2324 oflags |= SEC_READONLY; 2325 if (flags & MMO_SEC_CODE) 2326 oflags |= SEC_CODE; 2327 if (flags & MMO_SEC_DATA) 2328 oflags |= SEC_DATA; 2329 if (flags & MMO_SEC_NEVER_LOAD) 2330 oflags |= SEC_NEVER_LOAD; 2331 if (flags & MMO_SEC_IS_COMMON) 2332 oflags |= SEC_IS_COMMON; 2333 if (flags & MMO_SEC_DEBUGGING) 2334 oflags |= SEC_DEBUGGING; 2335 2336 return oflags; 2337 } 2338 2339 /* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and 2340 is 0. */ 2341 2342 static bfd_boolean 2343 mmo_has_leading_or_trailing_zero_tetra_p (bfd *abfd, asection *sec) 2344 { 2345 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2346 2347 if (sec->size < 4) 2348 return FALSE; 2349 2350 if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 2351 && bfd_get_32 (abfd, 2352 mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) 2353 return TRUE; 2354 2355 return FALSE; 2356 } 2357 2358 /* Write a section. */ 2359 2360 static bfd_boolean 2361 mmo_internal_write_section (bfd *abfd, asection *sec) 2362 { 2363 /* We do it differently depending on what section this is: 2364 2365 ".text": Output, prepended by information about the first source file 2366 (not yet implemented.) 2367 2368 ".data": Output. 2369 2370 (".MMIX.reg_contents": Not handled here.) 2371 2372 Anything else: Output inside a lop_spec 80, in the format described 2373 above. */ 2374 2375 if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) 2376 { 2377 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2378 2379 /* Because leading and trailing zeros are omitted in output, we need to 2380 specify the section boundaries so they're correct when the file 2381 is read in again. That's also the case if this section is 2382 specified as not within its usual boundaries or alignments. */ 2383 if (sec->size != 0 2384 && (secaddr + sec->size >= (bfd_vma) 1 << 56 2385 || (secaddr & 3) != 0 2386 || (sec->size & 3) != 0 2387 || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) 2388 { 2389 if (!mmo_write_section_description (abfd, sec)) 2390 return FALSE; 2391 } 2392 2393 /* FIXME: Output source file name and line number. */ 2394 return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); 2395 } 2396 else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) 2397 { 2398 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2399 2400 /* Same goes as for MMO_TEXT_SECTION_NAME above. */ 2401 if (sec->size != 0 2402 && (secaddr < (bfd_vma) 0x20 << 56 2403 || secaddr + sec->size >= (bfd_vma) 0x21 << 56 2404 || (secaddr & 3) != 0 2405 || (sec->size & 3) != 0 2406 || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) 2407 { 2408 if (!mmo_write_section_description (abfd, sec)) 2409 return FALSE; 2410 } 2411 2412 return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); 2413 } 2414 else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 2415 /* Not handled here. */ 2416 { 2417 /* This would normally be an abort call since this can't happen, but 2418 we don't do that. */ 2419 bfd_set_error (bfd_error_bad_value); 2420 return FALSE; 2421 } 2422 else if (strncmp (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX, 2423 strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)) == 0) 2424 { 2425 int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); 2426 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); 2427 return (! abfd->tdata.mmo_data->have_error 2428 && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); 2429 } 2430 /* Ignore sections that are just allocated or empty; we write out 2431 _contents_ here. */ 2432 else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 2433 && sec->size != 0) 2434 { 2435 if (!mmo_write_section_description (abfd, sec)) 2436 return FALSE; 2437 2438 /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually 2439 loaded. */ 2440 if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) 2441 return (! abfd->tdata.mmo_data->have_error 2442 && mmo_write_loc_chunk_list (abfd, 2443 mmo_section_data (sec)->head)); 2444 return (! abfd->tdata.mmo_data->have_error 2445 && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); 2446 } 2447 2448 /* Some section without contents. */ 2449 return TRUE; 2450 } 2451 2452 /* Write the description of a section, extended-mmo-style. */ 2453 2454 static bfd_boolean 2455 mmo_write_section_description (bfd *abfd, asection *sec) 2456 { 2457 /* Keep the following document-comment formatted the way it is. */ 2458 /* 2459 INODE 2460 mmo section mapping, , Symbol-table, mmo 2461 SUBSECTION 2462 mmo section mapping 2463 2464 The implementation in BFD uses special data type 80 (decimal) to 2465 encapsulate and describe named sections, containing e.g.@: debug 2466 information. If needed, any datum in the encapsulation will be 2467 quoted using lop_quote. First comes a 32-bit word holding the 2468 number of 32-bit words containing the zero-terminated zero-padded 2469 segment name. After the name there's a 32-bit word holding flags 2470 describing the section type. Then comes a 64-bit big-endian word 2471 with the section length (in bytes), then another with the section 2472 start address. Depending on the type of section, the contents 2473 might follow, zero-padded to 32-bit boundary. For a loadable 2474 section (such as data or code), the contents might follow at some 2475 later point, not necessarily immediately, as a lop_loc with the 2476 same start address as in the section description, followed by the 2477 contents. This in effect forms a descriptor that must be emitted 2478 before the actual contents. Sections described this way must not 2479 overlap. 2480 2481 For areas that don't have such descriptors, synthetic sections are 2482 formed by BFD. Consecutive contents in the two memory areas 2483 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and 2484 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in 2485 sections named <<.text>> and <<.data>> respectively. If an area 2486 is not otherwise described, but would together with a neighboring 2487 lower area be less than @samp{0x40000000} bytes long, it is joined 2488 with the lower area and the gap is zero-filled. For other cases, 2489 a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, 2490 @var{n} is a number, a running count through the mmo file, 2491 starting at 0. 2492 2493 EXAMPLE 2494 A loadable section specified as: 2495 2496 | .section secname,"ax" 2497 | TETRA 1,2,3,4,-1,-2009 2498 | BYTE 80 2499 2500 and linked to address @samp{0x4}, is represented by the sequence: 2501 2502 | 0x98080050 - lop_spec 80 2503 | 0x00000002 - two 32-bit words for the section name 2504 | 0x7365636e - "secn" 2505 | 0x616d6500 - "ame\0" 2506 | 0x00000033 - flags CODE, READONLY, LOAD, ALLOC 2507 | 0x00000000 - high 32 bits of section length 2508 | 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits 2509 | 0x00000000 - high 32 bits of section address 2510 | 0x00000004 - section address is 4 2511 | 0x98010002 - 64 bits with address of following data 2512 | 0x00000000 - high 32 bits of address 2513 | 0x00000004 - low 32 bits: data starts at address 4 2514 | 0x00000001 - 1 2515 | 0x00000002 - 2 2516 | 0x00000003 - 3 2517 | 0x00000004 - 4 2518 | 0xffffffff - -1 2519 | 0xfffff827 - -2009 2520 | 0x50000000 - 80 as a byte, padded with zeros. 2521 2522 Note that the lop_spec wrapping does not include the section 2523 contents. Compare this to a non-loaded section specified as: 2524 2525 | .section thirdsec 2526 | TETRA 200001,100002 2527 | BYTE 38,40 2528 2529 This, when linked to address @samp{0x200000000000001c}, is 2530 represented by: 2531 2532 | 0x98080050 - lop_spec 80 2533 | 0x00000002 - two 32-bit words for the section name 2534 | 0x7365636e - "thir" 2535 | 0x616d6500 - "dsec" 2536 | 0x00000010 - flag READONLY 2537 | 0x00000000 - high 32 bits of section length 2538 | 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits 2539 | 0x20000000 - high 32 bits of address 2540 | 0x0000001c - low 32 bits of address 0x200000000000001c 2541 | 0x00030d41 - 200001 2542 | 0x000186a2 - 100002 2543 | 0x26280000 - 38, 40 as bytes, padded with zeros 2544 2545 For the latter example, the section contents must not be 2546 loaded in memory, and is therefore specified as part of the 2547 special data. The address is usually unimportant but might 2548 provide information for e.g.@: the DWARF 2 debugging format. */ 2549 2550 mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); 2551 mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); 2552 mmo_write_chunk (abfd, (bfd_byte *) sec->name, strlen (sec->name)); 2553 mmo_flush_chunk (abfd); 2554 /* FIXME: We can get debug sections (.debug_line & Co.) with a section 2555 flag still having SEC_RELOC set. Investigate. This might be true 2556 for all alien sections; perhaps mmo.em should clear that flag. Might 2557 be related to weak references. */ 2558 mmo_write_tetra (abfd, 2559 mmo_sec_flags_from_bfd_flags 2560 (bfd_get_section_flags (abfd, sec))); 2561 mmo_write_octa (abfd, sec->size); 2562 mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); 2563 return TRUE; 2564 } 2565 2566 /* We save up all data before output. */ 2567 2568 static bfd_boolean 2569 mmo_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED, sec_ptr sec, 2570 const void *location, file_ptr offset, 2571 bfd_size_type bytes_to_do) 2572 { 2573 /* Iterate over diminishing chunk sizes, copying contents. */ 2574 while (bytes_to_do) 2575 { 2576 /* A minor song-and-dance to make sure we're not bitten by the 2577 distant possibility of the cast from bfd_vma to int making the 2578 chunk zero-sized. */ 2579 int chunk_size 2580 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; 2581 bfd_byte *loc; 2582 2583 do 2584 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); 2585 while (loc == NULL && (chunk_size /= 2) != 0); 2586 2587 if (chunk_size == 0) 2588 return FALSE; 2589 2590 memcpy (loc, location, chunk_size); 2591 2592 location += chunk_size; 2593 bytes_to_do -= chunk_size; 2594 offset += chunk_size; 2595 } 2596 return TRUE; 2597 } 2598 2599 /* Add a symbol to a trie-tree. */ 2600 2601 static bfd_boolean 2602 mmo_internal_add_3_sym (bfd *abfd, struct mmo_symbol_trie *rootp, 2603 const struct mmo_symbol *symp) 2604 { 2605 const char *name = symp->name; 2606 struct mmo_symbol_trie *trie = rootp; 2607 struct mmo_symbol_trie **triep = NULL; 2608 2609 while (*name && trie != NULL) 2610 { 2611 if (*name < trie->symchar) 2612 { 2613 triep = &trie->left; 2614 trie = trie->left; 2615 } 2616 else if (*name > trie->symchar) 2617 { 2618 triep = &trie->right; 2619 trie = trie->right; 2620 } 2621 else if (*name == trie->symchar) 2622 { 2623 triep = &trie->middle; 2624 name++; 2625 2626 /* Make sure "trie" points to where we should fill in the 2627 current symbol whenever we've iterated through "name". We 2628 would lose the right position if we encounter "foobar" then 2629 "foo". */ 2630 if (*name) 2631 trie = trie->middle; 2632 } 2633 } 2634 2635 while (*name != 0) 2636 { 2637 /* Create middle branches for the rest of the characters. */ 2638 trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); 2639 *triep = trie; 2640 trie->symchar = *name++; 2641 triep = &trie->middle; 2642 } 2643 2644 /* We discover a duplicate symbol rather late in the process, but still; 2645 we discover it and bail out. */ 2646 if (trie->sym.name != NULL) 2647 { 2648 (*_bfd_error_handler) 2649 (_("%s: invalid symbol table: duplicate symbol `%s'\n"), 2650 bfd_get_filename (abfd), trie->sym.name); 2651 bfd_set_error (bfd_error_bad_value); 2652 return FALSE; 2653 } 2654 2655 memcpy (&trie->sym, symp, sizeof *symp); 2656 return TRUE; 2657 } 2658 2659 /* Find out the length of the serialized version of a trie in bytes. */ 2660 2661 static unsigned int 2662 mmo_internal_3_length (bfd *abfd, struct mmo_symbol_trie *trie) 2663 { 2664 /* First, one for the control byte. */ 2665 unsigned int length = 1; 2666 2667 if (trie == NULL) 2668 return 0; 2669 2670 /* Add in the recursion to the left. */ 2671 length += mmo_internal_3_length (abfd, trie->left); 2672 2673 /* Add in the middle trie and the character. */ 2674 length += 1 + mmo_internal_3_length (abfd, trie->middle); 2675 2676 /* Add in the recursion to the right. */ 2677 length += mmo_internal_3_length (abfd, trie->right); 2678 2679 /* Add in bytes for the symbol (if this is an endnode). */ 2680 if (trie->sym.name != NULL) 2681 { 2682 unsigned int serno = trie->sym.serno; 2683 2684 /* First what it takes to encode the value. */ 2685 if (trie->sym.sym_type == mmo_reg_sym) 2686 length++; 2687 else if (trie->sym.sym_type == mmo_undef_sym) 2688 length += 2; 2689 else 2690 { 2691 bfd_vma value = trie->sym.value; 2692 2693 /* Coded in one to eight following bytes. */ 2694 if (trie->sym.sym_type == mmo_data_sym) 2695 value -= (bfd_vma) 0x20 << 56; 2696 2697 do 2698 { 2699 value >>= 8; 2700 length++; 2701 } 2702 while (value != 0); 2703 } 2704 2705 /* Find out what it takes to encode the serial number. */ 2706 do 2707 { 2708 serno >>= 7; 2709 length++; 2710 } 2711 while (serno != 0); 2712 } 2713 2714 return length; 2715 } 2716 2717 /* Helper function for outputting the serial number of a symbol, output as 2718 a variant of leb128 (see dwarf2 documentation) which could be called 2719 beb128. Using a helper function and recursion simplifies debugging. */ 2720 2721 static void 2722 mmo_beb128_out (bfd *abfd, int serno, int marker) 2723 { 2724 if (serno & ~0x7f) 2725 mmo_beb128_out (abfd, serno >> 7, 0); 2726 mmo_write_byte (abfd, marker | (serno & 0x7f)); 2727 } 2728 2729 /* Serialize a trie. */ 2730 2731 static void 2732 mmo_internal_3_dump (bfd *abfd, struct mmo_symbol_trie *trie) 2733 { 2734 bfd_byte control = 0; 2735 2736 if (trie == NULL) 2737 return; 2738 2739 if (trie->left) 2740 control |= MMO3_LEFT; 2741 2742 if (trie->middle) 2743 control |= MMO3_MIDDLE; 2744 2745 if (trie->right) 2746 control |= MMO3_RIGHT; 2747 2748 if (trie->sym.name != NULL) 2749 { 2750 /* Encode the symbol type and length of value bytes. */ 2751 if (trie->sym.sym_type == mmo_reg_sym) 2752 control |= MMO3_REGQUAL_BITS; 2753 else if (trie->sym.sym_type == mmo_undef_sym) 2754 control |= MMO3_UNDEF; 2755 else 2756 { 2757 bfd_vma value = trie->sym.value; 2758 2759 /* Coded in 1..8 following bytes. */ 2760 if (trie->sym.sym_type == mmo_data_sym) 2761 { 2762 control |= MMO3_DATA; 2763 value -= (bfd_vma) 0x20 << 56; 2764 } 2765 2766 do 2767 { 2768 value >>= 8; 2769 control++; 2770 } 2771 while (value != 0); 2772 } 2773 } 2774 2775 /* The control byte is output before recursing. */ 2776 mmo_write_byte (abfd, control); 2777 2778 mmo_internal_3_dump (abfd, trie->left); 2779 2780 if (control & MMO3_SYMBITS) 2781 { 2782 mmo_write_byte (abfd, trie->symchar); 2783 2784 if (trie->sym.name != NULL) 2785 { 2786 if (trie->sym.sym_type == mmo_reg_sym) 2787 mmo_write_byte (abfd, trie->sym.value); 2788 else if (trie->sym.sym_type == mmo_undef_sym) 2789 { 2790 mmo_write_byte (abfd, 0); 2791 mmo_write_byte (abfd, 0); 2792 } 2793 else 2794 { 2795 bfd_vma value = trie->sym.value; 2796 2797 bfd_byte byte_n = control & 15; 2798 2799 /* Coded in 1..8 following bytes. Note that the value is 2800 shifted out big-endian. */ 2801 if (trie->sym.sym_type == mmo_data_sym) 2802 { 2803 value -= (bfd_vma) 0x20 << 56; 2804 byte_n -= 8; 2805 } 2806 2807 do 2808 { 2809 mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); 2810 byte_n--; 2811 } 2812 while (byte_n != 0); 2813 } 2814 2815 mmo_beb128_out (abfd, trie->sym.serno, 128); 2816 } 2817 mmo_internal_3_dump (abfd, trie->middle); 2818 } 2819 mmo_internal_3_dump (abfd, trie->right); 2820 } 2821 2822 /* Write symbols in mmo format. Also write the lop_end terminator. */ 2823 2824 static bfd_boolean 2825 mmo_write_symbols_and_terminator (bfd *abfd) 2826 { 2827 int count = bfd_get_symcount (abfd); 2828 asymbol *maintable[2]; 2829 asymbol **table; 2830 asymbol **orig_table = bfd_get_outsymbols (abfd); 2831 int serno; 2832 struct mmo_symbol_trie root; 2833 int trie_len; 2834 int i; 2835 bfd_byte buf[4]; 2836 2837 /* Create a symbol for "Main". */ 2838 asymbol *fakemain = bfd_make_empty_symbol (abfd); 2839 2840 fakemain->flags = BSF_GLOBAL; 2841 fakemain->value = bfd_get_start_address (abfd); 2842 fakemain->name = MMIX_START_SYMBOL_NAME; 2843 fakemain->section = bfd_abs_section_ptr; 2844 maintable[0] = fakemain; 2845 maintable[1] = NULL; 2846 2847 memset (&root, 0, sizeof (root)); 2848 2849 /* Make all symbols take a left turn. */ 2850 root.symchar = 0xff; 2851 2852 /* There must always be a ":Main", so we'll add one if there are no 2853 symbols. Make sure we have room for it. */ 2854 table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); 2855 if (table == NULL) 2856 return FALSE; 2857 2858 memcpy (table, orig_table, count * sizeof (asymbol *)); 2859 2860 /* Move :Main (if there is one) to the first position. This is 2861 necessary to get the same layout of the trie-tree when linking as 2862 when objcopying the result as in the objcopy.exp test "simple objcopy 2863 of executable". It also automatically takes care of assigning serial 2864 number 1 to :Main (as is mandatory). */ 2865 for (i = 0; i < count; i++) 2866 if (table[i] != NULL 2867 && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 2868 && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) 2869 { 2870 asymbol *mainsym = table[i]; 2871 memcpy (table + 1, orig_table, i * sizeof (asymbol *)); 2872 table[0] = mainsym; 2873 2874 /* Check that the value assigned to :Main is the same as the entry 2875 address. The default linker script asserts this. This is as 2876 good a place as any to check this consistency. */ 2877 if ((mainsym->value 2878 + mainsym->section->output_section->vma 2879 + mainsym->section->output_offset) 2880 != bfd_get_start_address (abfd)) 2881 { 2882 /* Arbitrary buffer to hold the printable representation of a 2883 vma. */ 2884 char vmas_main[40]; 2885 char vmas_start[40]; 2886 bfd_vma vma_start = bfd_get_start_address (abfd); 2887 2888 sprintf_vma (vmas_main, mainsym->value); 2889 sprintf_vma (vmas_start, vma_start); 2890 2891 (*_bfd_error_handler) 2892 (_("%s: Bad symbol definition: `Main' set to %s rather" 2893 " than the start address %s\n"), 2894 bfd_get_filename (abfd), vmas_main, vmas_start); 2895 bfd_set_error (bfd_error_bad_value); 2896 return FALSE; 2897 } 2898 break; 2899 } 2900 if (i == count && count != 0) 2901 { 2902 /* When there are symbols, there must be a :Main. There was no 2903 :Main, so we need to add it manually. */ 2904 memcpy (table + 1, orig_table, count * sizeof (asymbol *)); 2905 table[0] = fakemain; 2906 count++; 2907 } 2908 2909 for (i = 0, serno = 1; i < count && table[i] != NULL; i++) 2910 { 2911 asymbol *s = table[i]; 2912 2913 /* It's not enough to consult bfd_is_local_label, since it does not 2914 mean "local" in the sense of linkable-and-observable-after-link. 2915 Let's just check the BSF_GLOBAL flag. 2916 2917 Also, don't export symbols with characters not in the allowed set. */ 2918 if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL 2919 && strspn (s->name, 2920 valid_mmo_symbol_character_set) == strlen (s->name)) 2921 { 2922 struct mmo_symbol sym; 2923 memset (&sym, 0, sizeof (sym)); 2924 2925 /* Need to strip const here; strdup:ing would leak and the 2926 existing string must be safe to reuse. */ 2927 sym.name = (char *) s->name; 2928 sym.value = 2929 s->value 2930 + s->section->output_section->vma 2931 + s->section->output_offset; 2932 2933 if (bfd_is_und_section (s->section)) 2934 sym.sym_type = mmo_undef_sym; 2935 else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 2936 /* The encoding of data symbols require that the "rest" 2937 of the value fits in 6 bytes, so the upper two bytes 2938 must be 0x2000. All other symbols get to be the 2939 absolute type. */ 2940 && (sym.value >> 48) == 0x2000) 2941 sym.sym_type = mmo_data_sym; 2942 else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) 2943 sym.sym_type = mmo_reg_sym; 2944 else if (strcmp (s->section->name, 2945 MMIX_REG_CONTENTS_SECTION_NAME) == 0) 2946 { 2947 sym.sym_type = mmo_reg_sym; 2948 sym.value /= 8; 2949 } 2950 else 2951 sym.sym_type = mmo_abs_sym; 2952 2953 /* FIXME: We assume the order of the received symbols is an 2954 ordered mapping of the serial numbers. This is not 2955 necessarily true if we e.g. objcopy a mmo file to another and 2956 there are gaps in the numbering. Not sure if this can 2957 happen. Not sure what to do. */ 2958 sym.serno = serno++; 2959 2960 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 2961 return FALSE; 2962 } 2963 } 2964 2965 /* Change the root node to be a ":"-prefix. */ 2966 root.symchar = ':'; 2967 root.middle = root.left; 2968 root.right = NULL; 2969 root.left = NULL; 2970 2971 /* We have to find out if we can fit the whole symbol table in the mmo 2972 symtab. It would be bad to assume we can always fit it in 262144 2973 bytes. If we can't, just leave the Main symbol. */ 2974 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 2975 2976 if (trie_len > 0xffff) 2977 { 2978 /* Test this code by using a lower limit in the test above and check 2979 that the single "Main" symbol is emitted and handled properly. 2980 There's no specific test-case. */ 2981 struct mmo_symbol sym; 2982 2983 (*_bfd_error_handler) 2984 (_("%s: warning: symbol table too large for mmo, larger than 65535" 2985 " 32-bit words: %d. Only `Main' will be emitted.\n"), 2986 bfd_get_filename (abfd), trie_len); 2987 2988 memset (&sym, 0, sizeof (sym)); 2989 sym.sym_type = mmo_abs_sym; 2990 sym.name = MMIX_START_SYMBOL_NAME; 2991 sym.serno = 1; 2992 sym.value = bfd_get_start_address (abfd); 2993 2994 /* Then patch up a symbol table to be just the ":Main" symbol. */ 2995 memset (&root, 0, sizeof (root)); 2996 root.left = root.middle; 2997 root.symchar = 0xff; 2998 root.middle = NULL; 2999 root.right = NULL; 3000 3001 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 3002 return FALSE; 3003 3004 root.symchar = ':'; 3005 root.middle = root.left; 3006 root.right = NULL; 3007 root.left = NULL; 3008 3009 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 3010 } 3011 3012 /* Reset the written-bytes counter. */ 3013 abfd->tdata.mmo_data->byte_no = 0; 3014 3015 /* Put out the lop_stab mark. */ 3016 bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); 3017 if (bfd_bwrite (buf, 4, abfd) != 4) 3018 return FALSE; 3019 3020 /* Dump out symbols. */ 3021 mmo_internal_3_dump (abfd, &root); 3022 3023 if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) 3024 { 3025 /* I haven't seen this trig. It seems no use claiming this case 3026 isn't debugged and abort if we get here. Instead emit a 3027 diagnostic and fail "normally". */ 3028 (*_bfd_error_handler) 3029 (_("%s: internal error, symbol table changed size from %d to %d" 3030 " words\n"), 3031 bfd_get_filename (abfd), trie_len, 3032 (abfd->tdata.mmo_data->byte_no + 3)/4); 3033 bfd_set_error (bfd_error_bad_value); 3034 return FALSE; 3035 } 3036 3037 /* Dump out remaining bytes in the buffer and handle I/O errors by 3038 propagating errors. */ 3039 if ((abfd->tdata.mmo_data->byte_no % 4) != 0 3040 || abfd->tdata.mmo_data->have_error) 3041 { 3042 memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), 3043 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); 3044 3045 if (abfd->tdata.mmo_data->have_error 3046 || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 3047 return FALSE; 3048 } 3049 3050 bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); 3051 return bfd_bwrite (buf, 4, abfd) == 4; 3052 } 3053 3054 /* Write section unless it is the register contents section. For that, we 3055 instead store the section in the supplied pointer. This function is 3056 used through bfd_map_over_sections. */ 3057 3058 static void 3059 mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) 3060 { 3061 struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; 3062 3063 if (! infop->retval) 3064 return; 3065 3066 if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 3067 { 3068 infop->reg_section = sec; 3069 return; 3070 } 3071 3072 /* Exclude the convenience register section. */ 3073 if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) 3074 { 3075 if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 3076 { 3077 /* Make sure it hasn't got contents. It seems impossible to 3078 make it carry contents, so we don't have a test-case for 3079 this. */ 3080 (*_bfd_error_handler) 3081 (_("%s: internal error, internal register section %s had" 3082 " contents\n"), 3083 bfd_get_filename (abfd), sec->name); 3084 bfd_set_error (bfd_error_bad_value); 3085 infop->retval = FALSE; 3086 return; 3087 } 3088 3089 return; 3090 } 3091 3092 infop->retval = mmo_internal_write_section (abfd, sec); 3093 } 3094 3095 /* Do the actual output of a file. Assumes mmo_set_section_contents is 3096 already called. */ 3097 3098 static bfd_boolean 3099 mmo_write_object_contents (bfd *abfd) 3100 { 3101 struct mmo_write_sec_info wsecinfo; 3102 3103 /* First, there are a few words of preamble. */ 3104 if (! mmo_internal_write_header (abfd)) 3105 return FALSE; 3106 3107 wsecinfo.reg_section = NULL; 3108 wsecinfo.retval = TRUE; 3109 3110 bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, 3111 &wsecinfo); 3112 3113 if (! wsecinfo.retval) 3114 return FALSE; 3115 3116 if (wsecinfo.reg_section != NULL) 3117 { 3118 asection *sec = wsecinfo.reg_section; 3119 unsigned int z = (unsigned int) (sec->vma / 8); 3120 3121 /* Registers 0..31 must not be global. Do sanity check on the "vma" 3122 of the register contents section and check that it corresponds to 3123 the length of the section. */ 3124 if (z < 32 || z >= 255 || (sec->vma & 7) != 0 3125 || sec->vma != 256 * 8 - sec->size - 8) 3126 { 3127 bfd_set_error (bfd_error_bad_value); 3128 3129 if (sec->size == 0) 3130 /* There must always be at least one such register. */ 3131 (*_bfd_error_handler) 3132 (_("%s: no initialized registers; section length 0\n"), 3133 bfd_get_filename (abfd)); 3134 else if (sec->vma > (256 - 32) * 8) 3135 /* Provide better error message for the case of too many 3136 global registers. */ 3137 (*_bfd_error_handler) 3138 (_("%s: too many initialized registers; section length %ld\n"), 3139 bfd_get_filename (abfd), 3140 (long) sec->size); 3141 else 3142 (*_bfd_error_handler) 3143 (_("%s: invalid start address for initialized registers of" 3144 " length %ld: 0x%lx%08lx\n"), 3145 bfd_get_filename (abfd), 3146 (long) sec->size, 3147 (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); 3148 3149 return FALSE; 3150 } 3151 3152 if (! mmo_internal_write_post (abfd, z, sec)) 3153 return FALSE; 3154 } 3155 else 3156 if (! mmo_internal_write_post (abfd, 255, NULL)) 3157 return FALSE; 3158 3159 return mmo_write_symbols_and_terminator (abfd); 3160 } 3161 3162 /* Return the size of a NULL pointer, so we support linking in an mmo 3163 object. */ 3164 3165 static long 3166 mmo_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, 3167 asection *sec ATTRIBUTE_UNUSED) 3168 { 3169 return sizeof (void *); 3170 } 3171 3172 /* Similarly canonicalize relocs to empty, filling in the terminating NULL 3173 pointer. */ 3174 3175 long 3176 mmo_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED, 3177 sec_ptr section ATTRIBUTE_UNUSED, arelent **relptr, 3178 asymbol **symbols ATTRIBUTE_UNUSED) 3179 { 3180 *relptr = NULL; 3181 return 0; 3182 } 3183 3184 /* If there's anything in particular in a mmo bfd that we want to free, 3185 make this a real function. Only do this if you see major memory 3186 thrashing; zealous free:ing will cause unwanted behavior, especially if 3187 you "free" memory allocated with "bfd_alloc", or even "bfd_release" a 3188 block allocated with "bfd_alloc"; they're really allocated from an 3189 obstack, and we don't know what was allocated there since this 3190 particular allocation. */ 3191 3192 #define mmo_close_and_cleanup _bfd_generic_close_and_cleanup 3193 #define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info 3194 3195 /* Perhaps we need to adjust this one; mmo labels (originally) without a 3196 leading ':' might more appropriately be called local. */ 3197 #define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name 3198 #define mmo_bfd_is_target_special_symbol \ 3199 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 3200 3201 /* Is this one really used or defined by anyone? */ 3202 #define mmo_get_lineno _bfd_nosymbols_get_lineno 3203 3204 /* FIXME: We can do better on this one, if we have a dwarf2 .debug_line 3205 section or if MMO line numbers are implemented. */ 3206 #define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line 3207 #define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info 3208 #define mmo_make_empty_symbol _bfd_generic_make_empty_symbol 3209 #define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 3210 #define mmo_read_minisymbols _bfd_generic_read_minisymbols 3211 #define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 3212 3213 #define mmo_get_section_contents_in_window \ 3214 _bfd_generic_get_section_contents_in_window 3215 #define mmo_bfd_get_relocated_section_contents \ 3216 bfd_generic_get_relocated_section_contents 3217 #define mmo_bfd_gc_sections bfd_generic_gc_sections 3218 #define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 3219 #define mmo_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 3220 #define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols 3221 #define mmo_bfd_link_just_syms _bfd_generic_link_just_syms 3222 #define mmo_bfd_final_link _bfd_generic_final_link 3223 #define mmo_bfd_link_split_section _bfd_generic_link_split_section 3224 3225 /* Strictly speaking, only MMIX uses this restricted format, but let's not 3226 stop anybody from shooting themselves in the foot. */ 3227 #define mmo_set_arch_mach bfd_default_set_arch_mach 3228 #define mmo_bfd_relax_section bfd_generic_relax_section 3229 #define mmo_bfd_merge_sections bfd_generic_merge_sections 3230 #define mmo_bfd_is_group_section bfd_generic_is_group_section 3231 #define mmo_bfd_discard_group bfd_generic_discard_group 3232 #define mmo_section_already_linked \ 3233 _bfd_generic_section_already_linked 3234 3235 /* objcopy will be upset if we return -1 from bfd_get_reloc_upper_bound by 3236 using BFD_JUMP_TABLE_RELOCS (_bfd_norelocs) rather than 0. FIXME: Most 3237 likely a bug in the _bfd_norelocs definition. 3238 3239 On the other hand, we smuggle in an mmo object (because setting up ELF 3240 is too cumbersome) when linking (from other formats, presumably ELF) to 3241 represent the g255 entry. We need to link that object, so need to say 3242 it has no relocs. Upper bound for the size of the relocation table is 3243 the size of a NULL pointer, and we support "canonicalization" for that 3244 pointer. */ 3245 #define mmo_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 3246 3247 /* We want to copy time of creation, otherwise we'd use 3248 BFD_JUMP_TABLE_COPY (_bfd_generic). */ 3249 #define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data 3250 #define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data 3251 #define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data 3252 #define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data 3253 #define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags 3254 #define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data 3255 3256 const bfd_target bfd_mmo_vec = 3257 { 3258 "mmo", /* name */ 3259 bfd_target_mmo_flavour, 3260 BFD_ENDIAN_BIG, /* target byte order */ 3261 BFD_ENDIAN_BIG, /* target headers byte order */ 3262 3263 /* FIXME: Might need adjustments. */ 3264 (HAS_RELOC | EXEC_P | /* object flags */ 3265 HAS_LINENO | HAS_DEBUG | 3266 HAS_SYMS | HAS_LOCALS | WP_TEXT), 3267 3268 /* FIXME: Might need adjustments. */ 3269 (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD 3270 | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), 3271 /* section flags */ 3272 0, /* leading underscore */ 3273 ' ', /* ar_pad_char */ 3274 16, /* ar_max_namelen */ 3275 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3276 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3277 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ 3278 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3279 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3280 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ 3281 3282 { 3283 _bfd_dummy_target, 3284 mmo_object_p, /* bfd_check_format */ 3285 _bfd_dummy_target, 3286 _bfd_dummy_target, 3287 }, 3288 { 3289 bfd_false, 3290 mmo_mkobject, 3291 bfd_false, 3292 bfd_false, 3293 }, 3294 { /* bfd_write_contents */ 3295 bfd_false, 3296 mmo_write_object_contents, 3297 bfd_false, 3298 bfd_false, 3299 }, 3300 3301 BFD_JUMP_TABLE_GENERIC (mmo), 3302 BFD_JUMP_TABLE_COPY (mmo), 3303 BFD_JUMP_TABLE_CORE (_bfd_nocore), 3304 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 3305 BFD_JUMP_TABLE_SYMBOLS (mmo), 3306 /* We have to provide a valid method for getting relocs, returning zero, 3307 so we can't say BFD_JUMP_TABLE_RELOCS (_bfd_norelocs). */ 3308 BFD_JUMP_TABLE_RELOCS (mmo), 3309 BFD_JUMP_TABLE_WRITE (mmo), 3310 BFD_JUMP_TABLE_LINK (mmo), 3311 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 3312 3313 NULL, 3314 3315 NULL 3316 }; 3317