1/* BFD back-end for mmo objects (MMIX-specific object-format). 2 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 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 3 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, 23 MA 02110-1301, USA. */ 24 25 26/* 27SECTION 28 mmo backend 29 30 The mmo object format is used exclusively together with Professor 31 Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator 32 @command{mmix} which is available at 33 @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz} 34 understands this format. That package also includes a combined 35 assembler and linker called @command{mmixal}. The mmo format has 36 no advantages feature-wise compared to e.g. ELF. It is a simple 37 non-relocatable object format with no support for archives or 38 debugging information, except for symbol value information and 39 line numbers (which is not yet implemented in BFD). See 40 @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more 41 information about MMIX. The ELF format is used for intermediate 42 object files in the BFD implementation. 43 44@c We want to xref the symbol table node. A feature in "chew" 45@c requires that "commands" do not contain spaces in the 46@c arguments. Hence the hyphen in "Symbol-table". 47@menu 48@* File layout:: 49@* Symbol-table:: 50@* mmo section mapping:: 51@end menu 52 53INODE 54File layout, Symbol-table, mmo, mmo 55SUBSECTION 56 File layout 57 58 The mmo file contents is not partitioned into named sections as 59 with e.g.@: ELF. Memory areas is formed by specifying the 60 location of the data that follows. Only the memory area 61 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so 62 it is used for code (and constants) and the area 63 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for 64 writable data. @xref{mmo section mapping}. 65 66 There is provision for specifying ``special data'' of 65536 67 different types. We use type 80 (decimal), arbitrarily chosen the 68 same as the ELF <<e_machine>> number for MMIX, filling it with 69 section information normally found in ELF objects. @xref{mmo 70 section mapping}. 71 72 Contents is entered as 32-bit words, xor:ed over previous 73 contents, always zero-initialized. A word that starts with the 74 byte @samp{0x98} forms a command called a @samp{lopcode}, where 75 the next byte distinguished between the thirteen lopcodes. The 76 two remaining bytes, called the @samp{Y} and @samp{Z} fields, or 77 the @samp{YZ} field (a 16-bit big-endian number), are used for 78 various purposes different for each lopcode. As documented in 79 @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz}, 80 the lopcodes are: 81 82 @table @code 83 @item lop_quote 84 0x98000001. The next word is contents, regardless of whether it 85 starts with 0x98 or not. 86 87 @item lop_loc 88 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location 89 directive, setting the location for the next data to the next 90 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), 91 plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment 92 and 2 for the data segment. 93 94 @item lop_skip 95 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. 96 97 @item lop_fixo 98 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location 99 as 64 bits into the location pointed to by the next 32-bit 100 (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * 101 2^56}. 102 103 @item lop_fixr 104 0x9804YYZZ. @samp{YZ} is stored into the current location plus 105 @math{2 - 4 * YZ}. 106 107 @item lop_fixrx 108 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from 109 the following 32-bit word are used in a manner similar to 110 @samp{YZ} in lop_fixr: it is xor:ed into the current location 111 minus @math{4 * L}. The first byte of the word is 0 or 1. If it 112 is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, 113 then @math{L = (@var{lowest 24 bits of word})}. 114 115 @item lop_file 116 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of 117 32-bit words. Set the file number to @samp{Y} and the line 118 counter to 0. The next @math{Z * 4} bytes contain the file name, 119 padded with zeros if the count is not a multiple of four. The 120 same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for 121 all but the first occurrence. 122 123 @item lop_line 124 0x9807YYZZ. @samp{YZ} is the line number. Together with 125 lop_file, it forms the source location for the next 32-bit word. 126 Note that for each non-lopcode 32-bit word, line numbers are 127 assumed incremented by one. 128 129 @item lop_spec 130 0x9808YYZZ. @samp{YZ} is the type number. Data until the next 131 lopcode other than lop_quote forms special data of type @samp{YZ}. 132 @xref{mmo section mapping}. 133 134 Other types than 80, (or type 80 with a content that does not 135 parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> 136 where @var{n} is the @samp{YZ}-type. The flags for such a 137 sections say not to allocate or load the data. The vma is 0. 138 Contents of multiple occurrences of special data @var{n} is 139 concatenated to the data of the previous lop_spec @var{n}s. The 140 location in data or code at which the lop_spec occurred is lost. 141 142 @item lop_pre 143 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the 144 length of header information in 32-bit words, where the first word 145 tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. 146 147 @item lop_post 148 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all 149 content-generating lopcodes in a program. The @samp{Z} field 150 denotes the value of @samp{rG} at the beginning of the program. 151 The following @math{256 - Z} big-endian 64-bit words are loaded 152 into global registers @samp{$G} @dots{} @samp{$255}. 153 154 @item lop_stab 155 0x980b0000. The next-to-last lopcode in a program. Must follow 156 immediately after the lop_post lopcode and its data. After this 157 lopcode follows all symbols in a compressed format 158 (@pxref{Symbol-table}). 159 160 @item lop_end 161 0x980cYYZZ. The last lopcode in a program. It must follow the 162 lop_stab lopcode and its data. The @samp{YZ} field contains the 163 number of 32-bit words of symbol table information after the 164 preceding lop_stab lopcode. 165 @end table 166 167 Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and 168 <<lop_fixo>> are not generated by BFD, but are handled. They are 169 generated by <<mmixal>>. 170 171EXAMPLE 172 This trivial one-label, one-instruction file: 173 174| :Main TRAP 1,2,3 175 176 can be represented this way in mmo: 177 178| 0x98090101 - lop_pre, one 32-bit word with timestamp. 179| <timestamp> 180| 0x98010002 - lop_loc, text segment, using a 64-bit address. 181| Note that mmixal does not emit this for the file above. 182| 0x00000000 - Address, high 32 bits. 183| 0x00000000 - Address, low 32 bits. 184| 0x98060002 - lop_file, 2 32-bit words for file-name. 185| 0x74657374 - "test" 186| 0x2e730000 - ".s\0\0" 187| 0x98070001 - lop_line, line 1. 188| 0x00010203 - TRAP 1,2,3 189| 0x980a00ff - lop_post, setting $255 to 0. 190| 0x00000000 191| 0x00000000 192| 0x980b0000 - lop_stab for ":Main" = 0, serial 1. 193| 0x203a4040 @xref{Symbol-table}. 194| 0x10404020 195| 0x4d206120 196| 0x69016e00 197| 0x81000000 198| 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ 199 200#include "sysdep.h" 201#include "bfd.h" 202#include "libbfd.h" 203#include "libiberty.h" 204#include "elf/mmix.h" 205#include "opcode/mmix.h" 206 207#define LOP 0x98 208#define LOP_QUOTE 0 209#define LOP_LOC 1 210#define LOP_SKIP 2 211#define LOP_FIXO 3 212#define LOP_FIXR 4 213#define LOP_FIXRX 5 214#define LOP_FILE 6 215#define LOP_LINE 7 216#define LOP_SPEC 8 217#define LOP_PRE 9 218#define LOP_POST 10 219#define LOP_STAB 11 220#define LOP_END 12 221 222#define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) 223#define SPEC_DATA_SECTION 80 224#define LOP_SPEC_SECTION \ 225 ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) 226 227/* Must be a power of two. If you change this to be >= 64k, you need a 228 new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ 229#define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) 230 231/* An arbitrary number for the maximum length section name size. */ 232#define MAX_SECTION_NAME_SIZE (1024 * 1024) 233 234/* A quite arbitrary number for the maximum length section size. */ 235#define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) 236 237#define MMO3_WCHAR 0x80 238#define MMO3_LEFT 0x40 239#define MMO3_MIDDLE 0x20 240#define MMO3_RIGHT 0x10 241#define MMO3_TYPEBITS 0xf 242#define MMO3_REGQUAL_BITS 0xf 243#define MMO3_UNDEF 2 244#define MMO3_DATA 8 245#define MMO3_SYMBITS 0x2f 246 247/* Put these everywhere in new code. */ 248#define FATAL_DEBUG \ 249 _bfd_abort (__FILE__, __LINE__, \ 250 "Internal: Non-debugged code (test-case missing)") 251 252#define BAD_CASE(x) \ 253 _bfd_abort (__FILE__, __LINE__, \ 254 "bad case for " #x) 255 256enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; 257 258/* When scanning the mmo file, a linked list of mmo_symbol 259 structures is built to represent the symbol table (if there is 260 one). */ 261 262struct mmo_symbol 263 { 264 struct mmo_symbol *next; 265 char *name; 266 bfd_vma value; 267 enum mmo_sym_type sym_type; 268 unsigned int serno; 269 }; 270 271struct mmo_data_list_struct 272 { 273 struct mmo_data_list_struct *next; 274 bfd_vma where; 275 bfd_size_type size; 276 bfd_size_type allocated_size; 277 bfd_byte data[1]; 278 }; 279 280typedef struct mmo_data_list_struct mmo_data_list_type; 281 282struct mmo_symbol_trie 283 { 284 struct mmo_symbol_trie *left; 285 struct mmo_symbol_trie *right; 286 struct mmo_symbol_trie *middle; 287 288 bfd_byte symchar; 289 290 /* A zero name means there's nothing here. */ 291 struct mmo_symbol sym; 292 }; 293 294/* The mmo tdata information. */ 295 296struct mmo_data_struct 297 { 298 struct mmo_symbol *symbols; 299 struct mmo_symbol *symtail; 300 asymbol *csymbols; 301 302 /* File representation of time (NULL) when this file was created. */ 303 bfd_byte created[4]; 304 305 /* When we're reading bytes recursively, check this occasionally. 306 Also holds write errors. */ 307 bfd_boolean have_error; 308 309 /* Max symbol length that may appear in the lop_stab table. Note that 310 this table might just hold a subset of symbols for not-really large 311 programs, as it can only be 65536 * 4 bytes large. */ 312 int max_symbol_length; 313 314 /* Here's the symbol we build in lop_stab. */ 315 char *lop_stab_symbol; 316 317 /* Index into lop_stab_symbol for the next character when parsing the 318 symbol information. */ 319 int symbol_position; 320 321 /* When creating arbitrary sections, we need to count section numbers. */ 322 int sec_no; 323 324 /* When writing or reading byte-wise, we need to count the bytes 325 within a 32-bit word. */ 326 int byte_no; 327 328 /* We also need a buffer to hold the bytes we count reading or writing. */ 329 bfd_byte buf[4]; 330 }; 331 332typedef struct mmo_data_struct tdata_type; 333 334struct mmo_section_data_struct 335 { 336 mmo_data_list_type *head; 337 mmo_data_list_type *tail; 338 }; 339 340#define mmo_section_data(sec) \ 341 ((struct mmo_section_data_struct *) (sec)->used_by_bfd) 342 343/* These structures are used in bfd_map_over_sections constructs. */ 344 345/* Used when writing out sections; all but the register contents section 346 which is stored in reg_section. */ 347struct mmo_write_sec_info 348 { 349 asection *reg_section; 350 bfd_boolean retval; 351 }; 352 353/* Used when trying to find a section corresponding to addr. */ 354struct mmo_find_sec_info 355 { 356 asection *sec; 357 bfd_vma addr; 358 }; 359 360static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); 361static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); 362static void mmo_find_sec_w_addr (bfd *, asection *, void *); 363static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); 364static asection *mmo_make_section (bfd *, const char *); 365static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 366static void mmo_print_symbol (bfd *, void *, asymbol *, 367 bfd_print_symbol_type); 368static void mmo_init (void); 369static bfd_boolean mmo_mkobject (bfd *); 370static bfd_boolean mmo_scan (bfd *); 371static asection *mmo_decide_section (bfd *, bfd_vma); 372static asection *mmo_get_generic_spec_data_section (bfd *, int); 373static asection *mmo_get_spec_section (bfd *, int); 374static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); 375static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); 376static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); 377static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); 378static const bfd_target *mmo_object_p (bfd *); 379static void mmo_map_set_sizes (bfd *, asection *, void *); 380static bfd_boolean mmo_get_symbols (bfd *); 381static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, 382 enum mmo_sym_type, unsigned int); 383static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, 384 file_ptr, bfd_size_type); 385static long mmo_get_symtab_upper_bound (bfd *); 386static long mmo_canonicalize_symtab (bfd *, asymbol **); 387static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 388static void mmo_print_symbol (bfd *, void *, asymbol *, 389 bfd_print_symbol_type); 390static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, 391 file_ptr, bfd_size_type); 392static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); 393static bfd_boolean mmo_internal_write_header (bfd *); 394static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); 395static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, 396 const struct mmo_symbol *); 397static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); 398static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); 399static void mmo_beb128_out (bfd *, int, int); 400static bfd_boolean mmo_internal_write_section (bfd *, asection *); 401static void mmo_write_tetra (bfd *, unsigned int); 402static void mmo_write_tetra_raw (bfd *, unsigned int); 403static void mmo_write_octa (bfd *, bfd_vma); 404static void mmo_write_octa_raw (bfd *, bfd_vma); 405static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); 406static bfd_boolean mmo_flush_chunk (bfd *); 407static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, 408 unsigned int, bfd_vma *); 409static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); 410static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); 411static bfd_boolean mmo_write_symbols_and_terminator (bfd *); 412static flagword mmo_sec_flags_from_bfd_flags (flagword); 413static flagword bfd_sec_flags_from_mmo_flags (flagword); 414static bfd_byte mmo_get_byte (bfd *); 415static void mmo_write_byte (bfd *, bfd_byte); 416static bfd_boolean mmo_new_section_hook (bfd *, asection *); 417static int mmo_sort_mmo_symbols (const void *, const void *); 418static bfd_boolean mmo_write_object_contents (bfd *); 419static bfd_boolean mmo_write_section_description (bfd *, asection *); 420static 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 427static 428char 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 444static asection * 445mmo_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 471static void 472mmo_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 494static const bfd_target * 495mmo_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 561static bfd_boolean 562mmo_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 585static bfd_boolean 586mmo_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 603static void 604mmo_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 618static void 619mmo_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 638static asection * 639mmo_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 707static INLINE void 708mmo_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 719static INLINE void 720mmo_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 731static INLINE void 732mmo_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 743static INLINE void 744mmo_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 756static INLINE void 757mmo_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 767static INLINE void 768mmo_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 776static INLINE void 777mmo_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 786static INLINE bfd_boolean 787mmo_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 835static INLINE bfd_boolean 836mmo_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 852static INLINE bfd_boolean 853mmo_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 866static bfd_boolean 867mmo_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 913static INLINE bfd_boolean 914mmo_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 929static asection * 930mmo_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 947static asection * 948mmo_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 1110static bfd_byte 1111mmo_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 1136static void 1137mmo_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 1150static bfd_boolean 1151mmo_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 1198static bfd_boolean 1199mmo_get_symbols (bfd *abfd) 1200{ 1201/* 1202INODE 1203Symbol-table, mmo section mapping, File layout, mmo 1204SUBSECTION 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 1414static INLINE bfd_byte * 1415mmo_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 1514static void 1515mmo_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 1523static bfd_boolean 1524mmo_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 bfd_size_type nbytes_read = 0; 1534 /* Buffer with room to read a 64-bit value. */ 1535 bfd_byte buf[8]; 1536 long stab_loc = -1; 1537 char *file_names[256]; 1538 1539 memset (file_names, 0, sizeof (file_names)); 1540 1541 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) 1542 goto error_return; 1543 1544 while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) 1545 { 1546 if (buf[0] == LOP) 1547 { 1548 unsigned int y = bfd_get_8 (abfd, buf + 2); 1549 unsigned int z = bfd_get_8 (abfd, buf + 3); 1550 1551 /* Change back to the original section for lopcodes other 1552 than LOP_QUOTE that comes after a LOP_SPEC. */ 1553 if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) 1554 && non_spec_sec != NULL) 1555 { 1556 sec = non_spec_sec; 1557 vma = non_spec_vma; 1558 non_spec_sec = NULL; 1559 } 1560 1561 switch (buf[1]) 1562 { 1563 default: 1564 (*_bfd_error_handler) 1565 (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), 1566 bfd_get_filename (abfd), buf[1]); 1567 bfd_set_error (bfd_error_bad_value); 1568 goto error_return; 1569 1570 case LOP_QUOTE: 1571 /* Quote the next 32-bit word. */ 1572 if (y != 0 || z != 1) 1573 { 1574 (*_bfd_error_handler) 1575 (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), 1576 bfd_get_filename (abfd), y*256+z); 1577 bfd_set_error (bfd_error_bad_value); 1578 goto error_return; 1579 } 1580 if (bfd_bread (buf, 4, abfd) != 4) 1581 goto error_return; 1582 1583 mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); 1584 vma += 4; 1585 vma &= ~3; 1586 lineno++; 1587 break; 1588 1589 case LOP_LOC: 1590 /* Set vma (and section). */ 1591 vma = (bfd_vma) y << 56; 1592 if (z == 1) 1593 { 1594 /* Get a 32-bit value. */ 1595 if (bfd_bread (buf, 4, abfd) != 4) 1596 goto error_return; 1597 1598 vma += bfd_get_32 (abfd, buf); 1599 } 1600 else if (z == 2) 1601 { 1602 /* Get a 64-bit value. */ 1603 if (bfd_bread (buf, 8, abfd) != 8) 1604 goto error_return; 1605 1606 vma += bfd_get_64 (abfd, buf); 1607 } 1608 else 1609 { 1610 (*_bfd_error_handler) 1611 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), 1612 bfd_get_filename (abfd), z); 1613 bfd_set_error (bfd_error_bad_value); 1614 goto error_return; 1615 } 1616 1617 sec = mmo_decide_section (abfd, vma); 1618 if (sec == NULL) 1619 goto error_return; 1620 break; 1621 1622 case LOP_SKIP: 1623 /* Move forward within the same section. */ 1624 vma += y * 256 + z; 1625 1626 sec = mmo_decide_section (abfd, vma); 1627 if (sec == NULL) 1628 goto error_return; 1629 break; 1630 1631 case LOP_FIXO: 1632 /* A fixup: Store the current vma somewhere. Position using 1633 same format as LOP_LOC. */ 1634 { 1635 bfd_vma p = (bfd_vma) y << 56; 1636 asection *fixosec; 1637 1638 if (z == 1) 1639 { 1640 /* Get a 32-bit value. */ 1641 if (bfd_bread (buf, 4, abfd) != 4) 1642 goto error_return; 1643 1644 p += bfd_get_32 (abfd, buf); 1645 } 1646 else if (z == 2) 1647 { 1648 /* Get a 64-bit value. */ 1649 if (bfd_bread (buf, 8, abfd) != 8) 1650 goto error_return; 1651 1652 p += bfd_get_64 (abfd, buf); 1653 } 1654 else 1655 { 1656 (*_bfd_error_handler) 1657 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), 1658 bfd_get_filename (abfd), z); 1659 bfd_set_error (bfd_error_bad_value); 1660 goto error_return; 1661 } 1662 1663 /* The section where we store this address might be a 1664 different one than the current section. */ 1665 fixosec = mmo_decide_section (abfd, p); 1666 if (fixosec == NULL) 1667 goto error_return; 1668 mmo_xore_64 (fixosec, p, vma); 1669 } 1670 break; 1671 1672 case LOP_FIXR: 1673 /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ 1674 { 1675 unsigned int yz = (y * 256 + z); 1676 bfd_vma p = vma + 2 - 4 * yz; 1677 asection *fixrsec = mmo_decide_section (abfd, p); 1678 if (fixrsec == NULL) 1679 goto error_return; 1680 mmo_xore_16 (fixrsec, p, yz); 1681 } 1682 break; 1683 1684 case LOP_FIXRX: 1685 /* A fixup, similar to lop_fixr, but taking larger numbers 1686 and can change branches into the opposite direction 1687 (gasp!). */ 1688 { 1689 bfd_vma delta; 1690 bfd_vma p; 1691 asection *fixrsec; 1692 1693 if (y != 0) 1694 { 1695 (*_bfd_error_handler) 1696 (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), 1697 bfd_get_filename (abfd), y); 1698 bfd_set_error (bfd_error_bad_value); 1699 goto error_return; 1700 } 1701 1702 if (z != 16 && z != 24) 1703 { 1704 (*_bfd_error_handler) 1705 (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), 1706 bfd_get_filename (abfd), z); 1707 bfd_set_error (bfd_error_bad_value); 1708 goto error_return; 1709 } 1710 1711 /* Get the next 32-bit value. */ 1712 if (bfd_bread (buf, 4, abfd) != 4) 1713 goto error_return; 1714 1715 delta = bfd_get_32 (abfd, buf); 1716 1717 /* Do an, ehm, involved calculation for the location of 1718 the fixup. See mmixal documentation for a verbose 1719 explanation. We follow it verbosely here for the 1720 readers delight. */ 1721 if (buf[0] == 0) 1722 p = vma - 4 * delta; 1723 else if (buf[0] == 1) 1724 p = vma - 4 * ((delta & 0xffffff) - (1 << z)); 1725 else 1726 { 1727 (*_bfd_error_handler) 1728 (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), 1729 bfd_get_filename (abfd), buf[0]); 1730 bfd_set_error (bfd_error_bad_value); 1731 goto error_return; 1732 } 1733 1734 fixrsec = mmo_decide_section (abfd, vma); 1735 if (fixrsec == NULL) 1736 goto error_return; 1737 mmo_xore_32 (fixrsec, p, delta); 1738 } 1739 break; 1740 1741 case LOP_FILE: 1742 /* Set current file and perhaps the file name. Reset line 1743 number. */ 1744 if (z != 0) 1745 { 1746 char *fname = bfd_malloc (z * 4 + 1); 1747 1748 if (fname == NULL) 1749 { 1750 (*_bfd_error_handler) 1751 (_("%s: cannot allocate file name for file number %d, %d bytes\n"), 1752 bfd_get_filename (abfd), y, z * 4 + 1); 1753 bfd_set_error (bfd_error_system_call); 1754 goto error_return; 1755 } 1756 1757 fname[z * 4] = 0; 1758 1759 for (i = 0; i < z; i++) 1760 { 1761 if (bfd_bread (fname + i * 4, 4, abfd) != 4) 1762 { 1763 free (fname); 1764 goto error_return; 1765 } 1766 } 1767 1768 if (file_names[y] != NULL) 1769 { 1770 (*_bfd_error_handler) 1771 (_("%s: invalid mmo file: file number %d `%s'," 1772 " was already entered as `%s'\n"), 1773 bfd_get_filename (abfd), y, fname, file_names[y]); 1774 bfd_set_error (bfd_error_bad_value); 1775 goto error_return; 1776 } 1777 1778 file_names[y] = fname; 1779 } 1780 1781 if (file_names[y] == NULL) 1782 { 1783 (*_bfd_error_handler) 1784 (_("%s: invalid mmo file: file name for number %d" 1785 " was not specified before use\n"), 1786 bfd_get_filename (abfd), y); 1787 bfd_set_error (bfd_error_bad_value); 1788 goto error_return; 1789 } 1790 1791 lineno = 0; 1792 break; 1793 1794 case LOP_LINE: 1795 /* Set line number. */ 1796 lineno = y * 256 + z; 1797 /* FIXME: Create a sequence of mmo-specific line number 1798 entries for each section, then translate into canonical 1799 format. */ 1800 break; 1801 1802 case LOP_SPEC: 1803 /* Special data follows until the next non-lop_quote 1804 lopcode. */ 1805 non_spec_sec = sec; 1806 non_spec_vma = vma; 1807 sec = mmo_get_spec_section (abfd, y * 256 + z); 1808 if (sec == NULL) 1809 goto error_return; 1810 1811 vma = sec->vma; 1812 break; 1813 1814 case LOP_PRE: 1815 { 1816 /* We ignore header information, except we read in the 1817 creation time from the first 32-bit word with the time 1818 in seconds since era. */ 1819 if (z >= 1 1820 && bfd_bread (abfd->tdata.mmo_data->created, 4, 1821 abfd) != 4) 1822 goto error_return; 1823 1824 for (i = 1; i < z; i++) 1825 if (bfd_bread (buf, 4, abfd) != 4) 1826 goto error_return; 1827 } 1828 break; 1829 1830 case LOP_POST: 1831 /* This tells of the contents of registers $Z..$255 at 1832 startup. We make a section out of it, with VMA = Z * 8, 1833 but only if Z != 255 or the contents is non-zero. */ 1834 { 1835 asection *rsec; 1836 bfd_byte *loc; 1837 bfd_vma first_octa; 1838 bfd_vma startaddr_octa; 1839 1840 /* Read first octaword outside loop to simplify logic when 1841 excluding the Z == 255, octa == 0 case. */ 1842 if (bfd_bread (buf, 8, abfd) != 8) 1843 goto error_return; 1844 1845 first_octa = bfd_get_64 (abfd, buf); 1846 1847 /* Don't emit contents for the trivial case which is 1848 always present; $255 pointing to Main. */ 1849 if (z != 255) 1850 { 1851 rsec 1852 = bfd_make_section_old_way (abfd, 1853 MMIX_REG_CONTENTS_SECTION_NAME); 1854 rsec->flags |= SEC_LINKER_CREATED; 1855 rsec->vma = z * 8; 1856 loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); 1857 bfd_put_64 (abfd, first_octa, loc); 1858 1859 for (i = z + 1; i < 255; i++) 1860 { 1861 if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) 1862 goto error_return; 1863 } 1864 1865 /* Read out the last octabyte, and use it to set the 1866 start address. */ 1867 if (bfd_bread (buf, 8, abfd) != 8) 1868 goto error_return; 1869 1870 startaddr_octa = bfd_get_64 (abfd, buf); 1871 } 1872 else 1873 startaddr_octa = first_octa; 1874 1875 if (! bfd_set_start_address (abfd, startaddr_octa)) 1876 { 1877 /* Currently this can't fail, but this should handle 1878 future failures. */ 1879 bfd_set_error (bfd_error_bad_value); 1880 goto error_return; 1881 } 1882 } 1883 break; 1884 1885 case LOP_STAB: 1886 /* We read in the symbols now, not later. */ 1887 if (y != 0 || z != 0) 1888 { 1889 (*_bfd_error_handler) 1890 (_("%s: invalid mmo file: fields y and z of lop_stab" 1891 " non-zero, y: %d, z: %d\n"), 1892 bfd_get_filename (abfd), y, z); 1893 bfd_set_error (bfd_error_bad_value); 1894 goto error_return; 1895 } 1896 1897 /* Save the location, so we can check that YZ in the LOP_END 1898 is correct. */ 1899 stab_loc = bfd_tell (abfd); 1900 1901 /* It's not said that an MMO can be without symbols (though 1902 mmixal will refuse to assemble files without Main), but 1903 it seems it would still be a valid mmo-file, so allow it. 1904 We detect the absence of a symbol area in that the upper 1905 limit is computed (from the lop_end YZ field) as 0. 1906 Don't call mmo_get_symbols; it can only detect the end of 1907 a valid symbol trie, not the absence of one. */ 1908 if (abfd->tdata.mmo_data->max_symbol_length != 0 1909 && ! mmo_get_symbols (abfd)) 1910 goto error_return; 1911 break; 1912 1913 case LOP_END: 1914 { 1915 /* This must be the last 32-bit word in an mmo file. 1916 Let's find out. */ 1917 struct stat statbuf; 1918 file_ptr curpos = bfd_tell (abfd); 1919 1920 if (bfd_stat (abfd, &statbuf) < 0) 1921 goto error_return; 1922 1923 if (statbuf.st_size != curpos) 1924 { 1925 (*_bfd_error_handler) 1926 (_("%s: invalid mmo file: lop_end not last item in" 1927 " file\n"), 1928 bfd_get_filename (abfd)); 1929 bfd_set_error (bfd_error_bad_value); 1930 goto error_return; 1931 } 1932 1933 /* Check that the YZ field is right. Subtract the size of 1934 this LOP_END in the calculation; YZ does not include 1935 it. */ 1936 if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) 1937 { 1938 (*_bfd_error_handler) 1939 (_("%s: invalid mmo file: YZ of lop_end (%ld)" 1940 " not equal to the number of tetras to the preceding" 1941 " lop_stab (%ld)\n"), 1942 bfd_get_filename (abfd), (long) (y * 256 + z), 1943 (curpos - stab_loc - 4)/4); 1944 bfd_set_error (bfd_error_bad_value); 1945 goto error_return; 1946 } 1947 1948 bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); 1949 goto done; 1950 } 1951 } 1952 } 1953 else 1954 { 1955 /* This wasn't a lopcode, so store it in the current section. */ 1956 mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); 1957 vma += 4; 1958 vma &= ~3; 1959 lineno++; 1960 } 1961 } 1962 1963 /* We know this file is a multiple of four bytes (checked in 1964 mmo_object_p), so if we got something other than 0, this was a bad 1965 file (although it's more likely we'll get 0 in that case too). 1966 If we got end-of-file, then there was no lop_stab, so the file has 1967 invalid format. */ 1968 1969 if (nbytes_read != 0) 1970 bfd_set_error (bfd_error_system_call); 1971 else 1972 bfd_set_error (bfd_error_bad_value); 1973 1974 error_return: 1975 error = TRUE; 1976 done: 1977 /* Mark the .text and .data section with their normal attribute if they 1978 contain anything. This is not redundant wrt. mmo_decide_section, 1979 since that code might never execute, and conversely the alloc+code 1980 section flags must be set then. */ 1981 sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 1982 if (sec != NULL 1983 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 1984 && ! bfd_set_section_flags (abfd, sec, 1985 bfd_get_section_flags (abfd, sec) 1986 | SEC_ALLOC | SEC_LOAD | SEC_CODE)) 1987 error = TRUE; 1988 1989 sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 1990 if (sec != NULL 1991 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 1992 && ! bfd_set_section_flags (abfd, sec, 1993 bfd_get_section_flags (abfd, sec) 1994 | SEC_ALLOC | SEC_LOAD)) 1995 error = TRUE; 1996 1997 /* Free whatever resources we took. */ 1998 for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) 1999 if (file_names[i]) 2000 free (file_names[i]); 2001 return ! error; 2002} 2003 2004/* A hook to set up object file dependent section information. For mmo, 2005 we point out the shape of allocated section contents. */ 2006 2007static bfd_boolean 2008mmo_new_section_hook (bfd *abfd, asection *newsect) 2009{ 2010 if (!newsect->used_by_bfd) 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 if (!newsect->used_by_bfd) 2017 return FALSE; 2018 } 2019 2020 /* Always align to at least 32-bit words. */ 2021 newsect->alignment_power = 2; 2022 return _bfd_generic_new_section_hook (abfd, newsect); 2023} 2024 2025/* We already have section contents loaded for sections that have 2026 contents. */ 2027 2028static bfd_boolean 2029mmo_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 2064static long 2065mmo_get_symtab_upper_bound (bfd *abfd) 2066{ 2067 return (abfd->symcount + 1) * sizeof (asymbol *); 2068} 2069 2070/* Sort mmo symbols by serial number. */ 2071 2072static int 2073mmo_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 2090static long 2091mmo_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 && symcount != 0) 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) 2121 return -1; 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 2200static void 2201mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2202 asymbol *symbol, symbol_info *ret) 2203{ 2204 bfd_symbol_info (symbol, ret); 2205} 2206 2207static void 2208mmo_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 2230static int 2231mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, 2232 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2233{ 2234 return 0; 2235} 2236 2237/* Write the (section-neutral) file preamble. */ 2238 2239static bfd_boolean 2240mmo_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 2259static bfd_boolean 2260mmo_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 2285static flagword 2286mmo_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 2312static flagword 2313bfd_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 2342static bfd_boolean 2343mmo_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 2360static bfd_boolean 2361mmo_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 (CONST_STRNEQ (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX)) 2423 { 2424 int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); 2425 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 2454static bfd_boolean 2455mmo_write_section_description (bfd *abfd, asection *sec) 2456{ 2457 /* Keep the following document-comment formatted the way it is. */ 2458/* 2459INODE 2460mmo section mapping, , Symbol-table, mmo 2461SUBSECTION 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 2493EXAMPLE 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 2568static bfd_boolean 2569mmo_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 2601static bfd_boolean 2602mmo_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 2661static unsigned int 2662mmo_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 2721static void 2722mmo_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 2731static void 2732mmo_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 2824static bfd_boolean 2825mmo_write_symbols_and_terminator (bfd *abfd) 2826{ 2827 int count = bfd_get_symcount (abfd); 2828 asymbol **table; 2829 asymbol **orig_table = bfd_get_outsymbols (abfd); 2830 int serno; 2831 struct mmo_symbol_trie root; 2832 int trie_len; 2833 int i; 2834 bfd_byte buf[4]; 2835 2836 /* Create a symbol for "Main". */ 2837 asymbol *fakemain = bfd_make_empty_symbol (abfd); 2838 2839 fakemain->flags = BSF_GLOBAL; 2840 fakemain->value = bfd_get_start_address (abfd); 2841 fakemain->name = MMIX_START_SYMBOL_NAME; 2842 fakemain->section = bfd_abs_section_ptr; 2843 2844 memset (&root, 0, sizeof (root)); 2845 2846 /* Make all symbols take a left turn. */ 2847 root.symchar = 0xff; 2848 2849 /* There must always be a ":Main", so we'll add one if there are no 2850 symbols. Make sure we have room for it. */ 2851 table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); 2852 if (table == NULL) 2853 return FALSE; 2854 2855 memcpy (table, orig_table, count * sizeof (asymbol *)); 2856 2857 /* Move :Main (if there is one) to the first position. This is 2858 necessary to get the same layout of the trie-tree when linking as 2859 when objcopying the result as in the objcopy.exp test "simple objcopy 2860 of executable". It also automatically takes care of assigning serial 2861 number 1 to :Main (as is mandatory). */ 2862 for (i = 0; i < count; i++) 2863 if (table[i] != NULL 2864 && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 2865 && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) 2866 { 2867 asymbol *mainsym = table[i]; 2868 memcpy (table + 1, orig_table, i * sizeof (asymbol *)); 2869 table[0] = mainsym; 2870 2871 /* Check that the value assigned to :Main is the same as the entry 2872 address. The default linker script asserts this. This is as 2873 good a place as any to check this consistency. */ 2874 if ((mainsym->value 2875 + mainsym->section->output_section->vma 2876 + mainsym->section->output_offset) 2877 != bfd_get_start_address (abfd)) 2878 { 2879 /* Arbitrary buffer to hold the printable representation of a 2880 vma. */ 2881 char vmas_main[40]; 2882 char vmas_start[40]; 2883 bfd_vma vma_start = bfd_get_start_address (abfd); 2884 2885 sprintf_vma (vmas_main, mainsym->value); 2886 sprintf_vma (vmas_start, vma_start); 2887 2888 (*_bfd_error_handler) 2889 (_("%s: Bad symbol definition: `Main' set to %s rather" 2890 " than the start address %s\n"), 2891 bfd_get_filename (abfd), vmas_main, vmas_start); 2892 bfd_set_error (bfd_error_bad_value); 2893 return FALSE; 2894 } 2895 break; 2896 } 2897 if (i == count && count != 0) 2898 { 2899 /* When there are symbols, there must be a :Main. There was no 2900 :Main, so we need to add it manually. */ 2901 memcpy (table + 1, orig_table, count * sizeof (asymbol *)); 2902 table[0] = fakemain; 2903 count++; 2904 } 2905 2906 for (i = 0, serno = 1; i < count && table[i] != NULL; i++) 2907 { 2908 asymbol *s = table[i]; 2909 2910 /* It's not enough to consult bfd_is_local_label, since it does not 2911 mean "local" in the sense of linkable-and-observable-after-link. 2912 Let's just check the BSF_GLOBAL flag. 2913 2914 Also, don't export symbols with characters not in the allowed set. */ 2915 if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL 2916 && strspn (s->name, 2917 valid_mmo_symbol_character_set) == strlen (s->name)) 2918 { 2919 struct mmo_symbol sym; 2920 memset (&sym, 0, sizeof (sym)); 2921 2922 /* Need to strip const here; strdup:ing would leak and the 2923 existing string must be safe to reuse. */ 2924 sym.name = (char *) s->name; 2925 sym.value = 2926 s->value 2927 + s->section->output_section->vma 2928 + s->section->output_offset; 2929 2930 if (bfd_is_und_section (s->section)) 2931 sym.sym_type = mmo_undef_sym; 2932 else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 2933 /* The encoding of data symbols require that the "rest" 2934 of the value fits in 6 bytes, so the upper two bytes 2935 must be 0x2000. All other symbols get to be the 2936 absolute type. */ 2937 && (sym.value >> 48) == 0x2000) 2938 sym.sym_type = mmo_data_sym; 2939 else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) 2940 sym.sym_type = mmo_reg_sym; 2941 else if (strcmp (s->section->name, 2942 MMIX_REG_CONTENTS_SECTION_NAME) == 0) 2943 { 2944 sym.sym_type = mmo_reg_sym; 2945 sym.value /= 8; 2946 } 2947 else 2948 sym.sym_type = mmo_abs_sym; 2949 2950 /* FIXME: We assume the order of the received symbols is an 2951 ordered mapping of the serial numbers. This is not 2952 necessarily true if we e.g. objcopy a mmo file to another and 2953 there are gaps in the numbering. Not sure if this can 2954 happen. Not sure what to do. */ 2955 sym.serno = serno++; 2956 2957 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 2958 return FALSE; 2959 } 2960 } 2961 2962 /* Change the root node to be a ":"-prefix. */ 2963 root.symchar = ':'; 2964 root.middle = root.left; 2965 root.right = NULL; 2966 root.left = NULL; 2967 2968 /* We have to find out if we can fit the whole symbol table in the mmo 2969 symtab. It would be bad to assume we can always fit it in 262144 2970 bytes. If we can't, just leave the Main symbol. */ 2971 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 2972 2973 if (trie_len > 0xffff) 2974 { 2975 /* Test this code by using a lower limit in the test above and check 2976 that the single "Main" symbol is emitted and handled properly. 2977 There's no specific test-case. */ 2978 struct mmo_symbol sym; 2979 2980 (*_bfd_error_handler) 2981 (_("%s: warning: symbol table too large for mmo, larger than 65535" 2982 " 32-bit words: %d. Only `Main' will be emitted.\n"), 2983 bfd_get_filename (abfd), trie_len); 2984 2985 memset (&sym, 0, sizeof (sym)); 2986 sym.sym_type = mmo_abs_sym; 2987 sym.name = MMIX_START_SYMBOL_NAME; 2988 sym.serno = 1; 2989 sym.value = bfd_get_start_address (abfd); 2990 2991 /* Then patch up a symbol table to be just the ":Main" symbol. */ 2992 memset (&root, 0, sizeof (root)); 2993 root.left = root.middle; 2994 root.symchar = 0xff; 2995 root.middle = NULL; 2996 root.right = NULL; 2997 2998 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 2999 return FALSE; 3000 3001 root.symchar = ':'; 3002 root.middle = root.left; 3003 root.right = NULL; 3004 root.left = NULL; 3005 3006 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 3007 } 3008 3009 /* Reset the written-bytes counter. */ 3010 abfd->tdata.mmo_data->byte_no = 0; 3011 3012 /* Put out the lop_stab mark. */ 3013 bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); 3014 if (bfd_bwrite (buf, 4, abfd) != 4) 3015 return FALSE; 3016 3017 /* Dump out symbols. */ 3018 mmo_internal_3_dump (abfd, &root); 3019 3020 if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) 3021 { 3022 /* I haven't seen this trig. It seems no use claiming this case 3023 isn't debugged and abort if we get here. Instead emit a 3024 diagnostic and fail "normally". */ 3025 (*_bfd_error_handler) 3026 (_("%s: internal error, symbol table changed size from %d to %d" 3027 " words\n"), 3028 bfd_get_filename (abfd), trie_len, 3029 (abfd->tdata.mmo_data->byte_no + 3)/4); 3030 bfd_set_error (bfd_error_bad_value); 3031 return FALSE; 3032 } 3033 3034 /* Dump out remaining bytes in the buffer and handle I/O errors by 3035 propagating errors. */ 3036 if ((abfd->tdata.mmo_data->byte_no % 4) != 0 3037 || abfd->tdata.mmo_data->have_error) 3038 { 3039 memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), 3040 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); 3041 3042 if (abfd->tdata.mmo_data->have_error 3043 || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 3044 return FALSE; 3045 } 3046 3047 bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); 3048 return bfd_bwrite (buf, 4, abfd) == 4; 3049} 3050 3051/* Write section unless it is the register contents section. For that, we 3052 instead store the section in the supplied pointer. This function is 3053 used through bfd_map_over_sections. */ 3054 3055static void 3056mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) 3057{ 3058 struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; 3059 3060 if (! infop->retval) 3061 return; 3062 3063 if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 3064 { 3065 infop->reg_section = sec; 3066 return; 3067 } 3068 3069 /* Exclude the convenience register section. */ 3070 if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) 3071 { 3072 if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 3073 { 3074 /* Make sure it hasn't got contents. It seems impossible to 3075 make it carry contents, so we don't have a test-case for 3076 this. */ 3077 (*_bfd_error_handler) 3078 (_("%s: internal error, internal register section %s had" 3079 " contents\n"), 3080 bfd_get_filename (abfd), sec->name); 3081 bfd_set_error (bfd_error_bad_value); 3082 infop->retval = FALSE; 3083 return; 3084 } 3085 3086 return; 3087 } 3088 3089 infop->retval = mmo_internal_write_section (abfd, sec); 3090} 3091 3092/* Do the actual output of a file. Assumes mmo_set_section_contents is 3093 already called. */ 3094 3095static bfd_boolean 3096mmo_write_object_contents (bfd *abfd) 3097{ 3098 struct mmo_write_sec_info wsecinfo; 3099 3100 /* First, there are a few words of preamble. */ 3101 if (! mmo_internal_write_header (abfd)) 3102 return FALSE; 3103 3104 wsecinfo.reg_section = NULL; 3105 wsecinfo.retval = TRUE; 3106 3107 bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, 3108 &wsecinfo); 3109 3110 if (! wsecinfo.retval) 3111 return FALSE; 3112 3113 if (wsecinfo.reg_section != NULL) 3114 { 3115 asection *sec = wsecinfo.reg_section; 3116 unsigned int z = (unsigned int) (sec->vma / 8); 3117 3118 /* Registers 0..31 must not be global. Do sanity check on the "vma" 3119 of the register contents section and check that it corresponds to 3120 the length of the section. */ 3121 if (z < 32 || z >= 255 || (sec->vma & 7) != 0 3122 || sec->vma != 256 * 8 - sec->size - 8) 3123 { 3124 bfd_set_error (bfd_error_bad_value); 3125 3126 if (sec->size == 0) 3127 /* There must always be at least one such register. */ 3128 (*_bfd_error_handler) 3129 (_("%s: no initialized registers; section length 0\n"), 3130 bfd_get_filename (abfd)); 3131 else if (sec->vma > (256 - 32) * 8) 3132 /* Provide better error message for the case of too many 3133 global registers. */ 3134 (*_bfd_error_handler) 3135 (_("%s: too many initialized registers; section length %ld\n"), 3136 bfd_get_filename (abfd), 3137 (long) sec->size); 3138 else 3139 (*_bfd_error_handler) 3140 (_("%s: invalid start address for initialized registers of" 3141 " length %ld: 0x%lx%08lx\n"), 3142 bfd_get_filename (abfd), 3143 (long) sec->size, 3144 (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); 3145 3146 return FALSE; 3147 } 3148 3149 if (! mmo_internal_write_post (abfd, z, sec)) 3150 return FALSE; 3151 } 3152 else 3153 if (! mmo_internal_write_post (abfd, 255, NULL)) 3154 return FALSE; 3155 3156 return mmo_write_symbols_and_terminator (abfd); 3157} 3158 3159/* If there's anything in particular in a mmo bfd that we want to free, 3160 make this a real function. Only do this if you see major memory 3161 thrashing; zealous free:ing will cause unwanted behavior, especially if 3162 you "free" memory allocated with "bfd_alloc", or even "bfd_release" a 3163 block allocated with "bfd_alloc"; they're really allocated from an 3164 obstack, and we don't know what was allocated there since this 3165 particular allocation. */ 3166 3167#define mmo_close_and_cleanup _bfd_generic_close_and_cleanup 3168#define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info 3169 3170/* Perhaps we need to adjust this one; mmo labels (originally) without a 3171 leading ':' might more appropriately be called local. */ 3172#define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name 3173#define mmo_bfd_is_target_special_symbol \ 3174 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 3175 3176/* Is this one really used or defined by anyone? */ 3177#define mmo_get_lineno _bfd_nosymbols_get_lineno 3178 3179/* FIXME: We can do better on this one, if we have a dwarf2 .debug_line 3180 section or if MMO line numbers are implemented. */ 3181#define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line 3182#define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info 3183#define mmo_make_empty_symbol _bfd_generic_make_empty_symbol 3184#define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 3185#define mmo_read_minisymbols _bfd_generic_read_minisymbols 3186#define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 3187 3188#define mmo_get_section_contents_in_window \ 3189 _bfd_generic_get_section_contents_in_window 3190#define mmo_bfd_get_relocated_section_contents \ 3191 bfd_generic_get_relocated_section_contents 3192#define mmo_bfd_gc_sections bfd_generic_gc_sections 3193#define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 3194#define mmo_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 3195#define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols 3196#define mmo_bfd_link_just_syms _bfd_generic_link_just_syms 3197#define mmo_bfd_copy_link_hash_symbol_type \ 3198 _bfd_generic_copy_link_hash_symbol_type 3199#define mmo_bfd_final_link _bfd_generic_final_link 3200#define mmo_bfd_link_split_section _bfd_generic_link_split_section 3201 3202/* Strictly speaking, only MMIX uses this restricted format, but let's not 3203 stop anybody from shooting themselves in the foot. */ 3204#define mmo_set_arch_mach bfd_default_set_arch_mach 3205#define mmo_bfd_relax_section bfd_generic_relax_section 3206#define mmo_bfd_merge_sections bfd_generic_merge_sections 3207#define mmo_bfd_is_group_section bfd_generic_is_group_section 3208#define mmo_bfd_discard_group bfd_generic_discard_group 3209#define mmo_section_already_linked \ 3210 _bfd_generic_section_already_linked 3211#define mmo_bfd_define_common_symbol bfd_generic_define_common_symbol 3212 3213/* We want to copy time of creation, otherwise we'd use 3214 BFD_JUMP_TABLE_COPY (_bfd_generic). */ 3215#define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data 3216#define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data 3217#define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data 3218#define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data 3219#define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags 3220#define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data 3221 3222const bfd_target bfd_mmo_vec = 3223{ 3224 "mmo", /* name */ 3225 bfd_target_mmo_flavour, 3226 BFD_ENDIAN_BIG, /* target byte order */ 3227 BFD_ENDIAN_BIG, /* target headers byte order */ 3228 3229 /* FIXME: Might need adjustments. */ 3230 (HAS_RELOC | EXEC_P | /* object flags */ 3231 HAS_LINENO | HAS_DEBUG | 3232 HAS_SYMS | HAS_LOCALS | WP_TEXT), 3233 3234 /* FIXME: Might need adjustments. */ 3235 (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD 3236 | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), 3237 /* section flags */ 3238 0, /* leading underscore */ 3239 ' ', /* ar_pad_char */ 3240 16, /* ar_max_namelen */ 3241 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3242 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3243 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ 3244 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3245 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3246 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ 3247 3248 { 3249 _bfd_dummy_target, 3250 mmo_object_p, /* bfd_check_format */ 3251 _bfd_dummy_target, 3252 _bfd_dummy_target, 3253 }, 3254 { 3255 bfd_false, 3256 mmo_mkobject, 3257 bfd_false, 3258 bfd_false, 3259 }, 3260 { /* bfd_write_contents */ 3261 bfd_false, 3262 mmo_write_object_contents, 3263 bfd_false, 3264 bfd_false, 3265 }, 3266 3267 BFD_JUMP_TABLE_GENERIC (mmo), 3268 BFD_JUMP_TABLE_COPY (mmo), 3269 BFD_JUMP_TABLE_CORE (_bfd_nocore), 3270 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 3271 BFD_JUMP_TABLE_SYMBOLS (mmo), 3272 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 3273 BFD_JUMP_TABLE_WRITE (mmo), 3274 BFD_JUMP_TABLE_LINK (mmo), 3275 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 3276 3277 NULL, 3278 3279 NULL 3280}; 3281