1/* BFD back-end for mmo objects (MMIX-specific object-format). 2 Copyright 2001, 2002, 2003, 2004, 2005, 2006 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 8This file is part of BFD, the Binary File Descriptor library. 9 10This program is free software; you can redistribute it and/or modify 11it under the terms of the GNU General Public License as published by 12the Free Software Foundation; either version 2 of the License, or 13(at your option) any later version. 14 15This program is distributed in the hope that it will be useful, 16but WITHOUT ANY WARRANTY; without even the implied warranty of 17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18GNU General Public License for more details. 19 20You should have received a copy of the GNU General Public License 21along with this program; if not, write to the Free Software 22Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 23 24/* 25SECTION 26 mmo backend 27 28 The mmo object format is used exclusively together with Professor 29 Donald E.@: Knuth's educational 64-bit processor MMIX. The simulator 30 @command{mmix} which is available at 31 @url{http://www-cs-faculty.stanford.edu/~knuth/programs/mmix.tar.gz} 32 understands this format. That package also includes a combined 33 assembler and linker called @command{mmixal}. The mmo format has 34 no advantages feature-wise compared to e.g. ELF. It is a simple 35 non-relocatable object format with no support for archives or 36 debugging information, except for symbol value information and 37 line numbers (which is not yet implemented in BFD). See 38 @url{http://www-cs-faculty.stanford.edu/~knuth/mmix.html} for more 39 information about MMIX. The ELF format is used for intermediate 40 object files in the BFD implementation. 41 42@c We want to xref the symbol table node. A feature in "chew" 43@c requires that "commands" do not contain spaces in the 44@c arguments. Hence the hyphen in "Symbol-table". 45@menu 46@* File layout:: 47@* Symbol-table:: 48@* mmo section mapping:: 49@end menu 50 51INODE 52File layout, Symbol-table, mmo, mmo 53SUBSECTION 54 File layout 55 56 The mmo file contents is not partitioned into named sections as 57 with e.g.@: ELF. Memory areas is formed by specifying the 58 location of the data that follows. Only the memory area 59 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} is executable, so 60 it is used for code (and constants) and the area 61 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} is used for 62 writable data. @xref{mmo section mapping}. 63 64 There is provision for specifying ``special data'' of 65536 65 different types. We use type 80 (decimal), arbitrarily chosen the 66 same as the ELF <<e_machine>> number for MMIX, filling it with 67 section information normally found in ELF objects. @xref{mmo 68 section mapping}. 69 70 Contents is entered as 32-bit words, xor:ed over previous 71 contents, always zero-initialized. A word that starts with the 72 byte @samp{0x98} forms a command called a @samp{lopcode}, where 73 the next byte distinguished between the thirteen lopcodes. The 74 two remaining bytes, called the @samp{Y} and @samp{Z} fields, or 75 the @samp{YZ} field (a 16-bit big-endian number), are used for 76 various purposes different for each lopcode. As documented in 77 @url{http://www-cs-faculty.stanford.edu/~knuth/mmixal-intro.ps.gz}, 78 the lopcodes are: 79 80 @table @code 81 @item lop_quote 82 0x98000001. The next word is contents, regardless of whether it 83 starts with 0x98 or not. 84 85 @item lop_loc 86 0x9801YYZZ, where @samp{Z} is 1 or 2. This is a location 87 directive, setting the location for the next data to the next 88 32-bit word (for @math{Z = 1}) or 64-bit word (for @math{Z = 2}), 89 plus @math{Y * 2^56}. Normally @samp{Y} is 0 for the text segment 90 and 2 for the data segment. 91 92 @item lop_skip 93 0x9802YYZZ. Increase the current location by @samp{YZ} bytes. 94 95 @item lop_fixo 96 0x9803YYZZ, where @samp{Z} is 1 or 2. Store the current location 97 as 64 bits into the location pointed to by the next 32-bit 98 (@math{Z = 1}) or 64-bit (@math{Z = 2}) word, plus @math{Y * 99 2^56}. 100 101 @item lop_fixr 102 0x9804YYZZ. @samp{YZ} is stored into the current location plus 103 @math{2 - 4 * YZ}. 104 105 @item lop_fixrx 106 0x980500ZZ. @samp{Z} is 16 or 24. A value @samp{L} derived from 107 the following 32-bit word are used in a manner similar to 108 @samp{YZ} in lop_fixr: it is xor:ed into the current location 109 minus @math{4 * L}. The first byte of the word is 0 or 1. If it 110 is 1, then @math{L = (@var{lowest 24 bits of word}) - 2^Z}, if 0, 111 then @math{L = (@var{lowest 24 bits of word})}. 112 113 @item lop_file 114 0x9806YYZZ. @samp{Y} is the file number, @samp{Z} is count of 115 32-bit words. Set the file number to @samp{Y} and the line 116 counter to 0. The next @math{Z * 4} bytes contain the file name, 117 padded with zeros if the count is not a multiple of four. The 118 same @samp{Y} may occur multiple times, but @samp{Z} must be 0 for 119 all but the first occurrence. 120 121 @item lop_line 122 0x9807YYZZ. @samp{YZ} is the line number. Together with 123 lop_file, it forms the source location for the next 32-bit word. 124 Note that for each non-lopcode 32-bit word, line numbers are 125 assumed incremented by one. 126 127 @item lop_spec 128 0x9808YYZZ. @samp{YZ} is the type number. Data until the next 129 lopcode other than lop_quote forms special data of type @samp{YZ}. 130 @xref{mmo section mapping}. 131 132 Other types than 80, (or type 80 with a content that does not 133 parse) is stored in sections named <<.MMIX.spec_data.@var{n}>> 134 where @var{n} is the @samp{YZ}-type. The flags for such a 135 sections say not to allocate or load the data. The vma is 0. 136 Contents of multiple occurrences of special data @var{n} is 137 concatenated to the data of the previous lop_spec @var{n}s. The 138 location in data or code at which the lop_spec occurred is lost. 139 140 @item lop_pre 141 0x980901ZZ. The first lopcode in a file. The @samp{Z} field forms the 142 length of header information in 32-bit words, where the first word 143 tells the time in seconds since @samp{00:00:00 GMT Jan 1 1970}. 144 145 @item lop_post 146 0x980a00ZZ. @math{Z > 32}. This lopcode follows after all 147 content-generating lopcodes in a program. The @samp{Z} field 148 denotes the value of @samp{rG} at the beginning of the program. 149 The following @math{256 - Z} big-endian 64-bit words are loaded 150 into global registers @samp{$G} @dots{} @samp{$255}. 151 152 @item lop_stab 153 0x980b0000. The next-to-last lopcode in a program. Must follow 154 immediately after the lop_post lopcode and its data. After this 155 lopcode follows all symbols in a compressed format 156 (@pxref{Symbol-table}). 157 158 @item lop_end 159 0x980cYYZZ. The last lopcode in a program. It must follow the 160 lop_stab lopcode and its data. The @samp{YZ} field contains the 161 number of 32-bit words of symbol table information after the 162 preceding lop_stab lopcode. 163 @end table 164 165 Note that the lopcode "fixups"; <<lop_fixr>>, <<lop_fixrx>> and 166 <<lop_fixo>> are not generated by BFD, but are handled. They are 167 generated by <<mmixal>>. 168 169EXAMPLE 170 This trivial one-label, one-instruction file: 171 172| :Main TRAP 1,2,3 173 174 can be represented this way in mmo: 175 176| 0x98090101 - lop_pre, one 32-bit word with timestamp. 177| <timestamp> 178| 0x98010002 - lop_loc, text segment, using a 64-bit address. 179| Note that mmixal does not emit this for the file above. 180| 0x00000000 - Address, high 32 bits. 181| 0x00000000 - Address, low 32 bits. 182| 0x98060002 - lop_file, 2 32-bit words for file-name. 183| 0x74657374 - "test" 184| 0x2e730000 - ".s\0\0" 185| 0x98070001 - lop_line, line 1. 186| 0x00010203 - TRAP 1,2,3 187| 0x980a00ff - lop_post, setting $255 to 0. 188| 0x00000000 189| 0x00000000 190| 0x980b0000 - lop_stab for ":Main" = 0, serial 1. 191| 0x203a4040 @xref{Symbol-table}. 192| 0x10404020 193| 0x4d206120 194| 0x69016e00 195| 0x81000000 196| 0x980c0005 - lop_end; symbol table contained five 32-bit words. */ 197 198#include "bfd.h" 199#include "sysdep.h" 200#include "libbfd.h" 201#include "libiberty.h" 202#include "elf/mmix.h" 203#include "opcode/mmix.h" 204 205#define LOP 0x98 206#define LOP_QUOTE 0 207#define LOP_LOC 1 208#define LOP_SKIP 2 209#define LOP_FIXO 3 210#define LOP_FIXR 4 211#define LOP_FIXRX 5 212#define LOP_FILE 6 213#define LOP_LINE 7 214#define LOP_SPEC 8 215#define LOP_PRE 9 216#define LOP_POST 10 217#define LOP_STAB 11 218#define LOP_END 12 219 220#define LOP_QUOTE_NEXT ((LOP << 24) | (LOP_QUOTE << 16) | 1) 221#define SPEC_DATA_SECTION 80 222#define LOP_SPEC_SECTION \ 223 ((LOP << 24) | (LOP_SPEC << 16) | SPEC_DATA_SECTION) 224 225/* Must be a power of two. If you change this to be >= 64k, you need a 226 new test-case; the ld test b-loc64k.d touches chunk-size problem areas. */ 227#define MMO_SEC_CONTENTS_CHUNK_SIZE (1 << 15) 228 229/* An arbitrary number for the maximum length section name size. */ 230#define MAX_SECTION_NAME_SIZE (1024 * 1024) 231 232/* A quite arbitrary number for the maximum length section size. */ 233#define MAX_ARTIFICIAL_SECTION_SIZE (1024 * 1024 * 1024) 234 235#define MMO3_WCHAR 0x80 236#define MMO3_LEFT 0x40 237#define MMO3_MIDDLE 0x20 238#define MMO3_RIGHT 0x10 239#define MMO3_TYPEBITS 0xf 240#define MMO3_REGQUAL_BITS 0xf 241#define MMO3_UNDEF 2 242#define MMO3_DATA 8 243#define MMO3_SYMBITS 0x2f 244 245/* Put these everywhere in new code. */ 246#define FATAL_DEBUG \ 247 _bfd_abort (__FILE__, __LINE__, \ 248 "Internal: Non-debugged code (test-case missing)") 249 250#define BAD_CASE(x) \ 251 _bfd_abort (__FILE__, __LINE__, \ 252 "bad case for " #x) 253 254enum mmo_sym_type { mmo_reg_sym, mmo_undef_sym, mmo_data_sym, mmo_abs_sym}; 255 256/* When scanning the mmo file, a linked list of mmo_symbol 257 structures is built to represent the symbol table (if there is 258 one). */ 259 260struct mmo_symbol 261 { 262 struct mmo_symbol *next; 263 char *name; 264 bfd_vma value; 265 enum mmo_sym_type sym_type; 266 unsigned int serno; 267 }; 268 269struct mmo_data_list_struct 270 { 271 struct mmo_data_list_struct *next; 272 bfd_vma where; 273 bfd_size_type size; 274 bfd_size_type allocated_size; 275 bfd_byte data[1]; 276 }; 277 278typedef struct mmo_data_list_struct mmo_data_list_type; 279 280struct mmo_symbol_trie 281 { 282 struct mmo_symbol_trie *left; 283 struct mmo_symbol_trie *right; 284 struct mmo_symbol_trie *middle; 285 286 bfd_byte symchar; 287 288 /* A zero name means there's nothing here. */ 289 struct mmo_symbol sym; 290 }; 291 292/* The mmo tdata information. */ 293 294struct mmo_data_struct 295 { 296 struct mmo_symbol *symbols; 297 struct mmo_symbol *symtail; 298 asymbol *csymbols; 299 300 /* File representation of time (NULL) when this file was created. */ 301 bfd_byte created[4]; 302 303 /* When we're reading bytes recursively, check this occasionally. 304 Also holds write errors. */ 305 bfd_boolean have_error; 306 307 /* Max symbol length that may appear in the lop_stab table. Note that 308 this table might just hold a subset of symbols for not-really large 309 programs, as it can only be 65536 * 4 bytes large. */ 310 int max_symbol_length; 311 312 /* Here's the symbol we build in lop_stab. */ 313 char *lop_stab_symbol; 314 315 /* Index into lop_stab_symbol for the next character when parsing the 316 symbol information. */ 317 int symbol_position; 318 319 /* When creating arbitrary sections, we need to count section numbers. */ 320 int sec_no; 321 322 /* When writing or reading byte-wise, we need to count the bytes 323 within a 32-bit word. */ 324 int byte_no; 325 326 /* We also need a buffer to hold the bytes we count reading or writing. */ 327 bfd_byte buf[4]; 328 }; 329 330typedef struct mmo_data_struct tdata_type; 331 332struct mmo_section_data_struct 333 { 334 mmo_data_list_type *head; 335 mmo_data_list_type *tail; 336 }; 337 338#define mmo_section_data(sec) \ 339 ((struct mmo_section_data_struct *) (sec)->used_by_bfd) 340 341/* These structures are used in bfd_map_over_sections constructs. */ 342 343/* Used when writing out sections; all but the register contents section 344 which is stored in reg_section. */ 345struct mmo_write_sec_info 346 { 347 asection *reg_section; 348 bfd_boolean retval; 349 }; 350 351/* Used when trying to find a section corresponding to addr. */ 352struct mmo_find_sec_info 353 { 354 asection *sec; 355 bfd_vma addr; 356 }; 357 358static bfd_boolean mmo_bfd_copy_private_bfd_data (bfd *, bfd *); 359static void mmo_write_section_unless_reg_contents (bfd *, asection *, void *); 360static void mmo_find_sec_w_addr (bfd *, asection *, void *); 361static void mmo_find_sec_w_addr_grow (bfd *, asection *, void *); 362static asection *mmo_make_section (bfd *, const char *); 363static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 364static void mmo_print_symbol (bfd *, void *, asymbol *, 365 bfd_print_symbol_type); 366static void mmo_init (void); 367static bfd_boolean mmo_mkobject (bfd *); 368static bfd_boolean mmo_scan (bfd *); 369static asection *mmo_decide_section (bfd *, bfd_vma); 370static asection *mmo_get_generic_spec_data_section (bfd *, int); 371static asection *mmo_get_spec_section (bfd *, int); 372static INLINE bfd_byte *mmo_get_loc (asection *, bfd_vma, int); 373static void mmo_xore_64 (asection *, bfd_vma vma, bfd_vma value); 374static void mmo_xore_32 (asection *, bfd_vma vma, unsigned int); 375static void mmo_xore_16 (asection *, bfd_vma vma, unsigned int); 376static const bfd_target *mmo_object_p (bfd *); 377static void mmo_map_set_sizes (bfd *, asection *, void *); 378static bfd_boolean mmo_get_symbols (bfd *); 379static bfd_boolean mmo_create_symbol (bfd *, const char *, bfd_vma, 380 enum mmo_sym_type, unsigned int); 381static bfd_boolean mmo_get_section_contents (bfd *, asection *, void *, 382 file_ptr, bfd_size_type); 383static long mmo_get_symtab_upper_bound (bfd *); 384static long mmo_canonicalize_symtab (bfd *, asymbol **); 385static void mmo_get_symbol_info (bfd *, asymbol *, symbol_info *); 386static void mmo_print_symbol (bfd *, void *, asymbol *, 387 bfd_print_symbol_type); 388static bfd_boolean mmo_set_section_contents (bfd *, sec_ptr, const void *, 389 file_ptr, bfd_size_type); 390static int mmo_sizeof_headers (bfd *, struct bfd_link_info *); 391static long mmo_get_reloc_upper_bound (bfd *, asection *); 392static bfd_boolean mmo_internal_write_header (bfd *); 393static bfd_boolean mmo_internal_write_post (bfd *, int, asection *); 394static bfd_boolean mmo_internal_add_3_sym (bfd *, struct mmo_symbol_trie *, 395 const struct mmo_symbol *); 396static unsigned int mmo_internal_3_length (bfd *, struct mmo_symbol_trie *); 397static void mmo_internal_3_dump (bfd *, struct mmo_symbol_trie *); 398static void mmo_beb128_out (bfd *, int, int); 399static bfd_boolean mmo_internal_write_section (bfd *, asection *); 400static void mmo_write_tetra (bfd *, unsigned int); 401static void mmo_write_tetra_raw (bfd *, unsigned int); 402static void mmo_write_octa (bfd *, bfd_vma); 403static void mmo_write_octa_raw (bfd *, bfd_vma); 404static bfd_boolean mmo_write_chunk (bfd *, const bfd_byte *, unsigned int); 405static bfd_boolean mmo_flush_chunk (bfd *); 406static bfd_boolean mmo_write_loc_chunk (bfd *, bfd_vma, const bfd_byte *, 407 unsigned int, bfd_vma *); 408static bfd_boolean mmo_write_chunk_list (bfd *, mmo_data_list_type *); 409static bfd_boolean mmo_write_loc_chunk_list (bfd *, mmo_data_list_type *); 410static bfd_boolean mmo_write_symbols_and_terminator (bfd *); 411static flagword mmo_sec_flags_from_bfd_flags (flagword); 412static flagword bfd_sec_flags_from_mmo_flags (flagword); 413static bfd_byte mmo_get_byte (bfd *); 414static void mmo_write_byte (bfd *, bfd_byte); 415static bfd_boolean mmo_new_section_hook (bfd *, asection *); 416static int mmo_sort_mmo_symbols (const void *, const void *); 417static bfd_boolean mmo_write_object_contents (bfd *); 418static long mmo_canonicalize_reloc (bfd *, sec_ptr, arelent **, asymbol **); 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 char *current_filename = NULL; 1534 bfd_size_type nbytes_read = 0; 1535 /* Buffer with room to read a 64-bit value. */ 1536 bfd_byte buf[8]; 1537 long stab_loc = -1; 1538 char *file_names[256]; 1539 1540 memset (file_names, 0, sizeof (file_names)); 1541 1542 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) 1543 goto error_return; 1544 1545 while ((nbytes_read = bfd_bread (buf, 4, abfd)) == 4) 1546 { 1547 if (buf[0] == LOP) 1548 { 1549 unsigned int y = bfd_get_8 (abfd, buf + 2); 1550 unsigned int z = bfd_get_8 (abfd, buf + 3); 1551 1552 /* Change back to the original section for lopcodes other 1553 than LOP_QUOTE that comes after a LOP_SPEC. */ 1554 if ((buf[1] != LOP_QUOTE || y != 0 || z != 1) 1555 && non_spec_sec != NULL) 1556 { 1557 sec = non_spec_sec; 1558 vma = non_spec_vma; 1559 non_spec_sec = NULL; 1560 } 1561 1562 switch (buf[1]) 1563 { 1564 default: 1565 (*_bfd_error_handler) 1566 (_("%s: invalid mmo file: unsupported lopcode `%d'\n"), 1567 bfd_get_filename (abfd), buf[1]); 1568 bfd_set_error (bfd_error_bad_value); 1569 goto error_return; 1570 1571 case LOP_QUOTE: 1572 /* Quote the next 32-bit word. */ 1573 if (y != 0 || z != 1) 1574 { 1575 (*_bfd_error_handler) 1576 (_("%s: invalid mmo file: expected YZ = 1 got YZ = %d for lop_quote\n"), 1577 bfd_get_filename (abfd), y*256+z); 1578 bfd_set_error (bfd_error_bad_value); 1579 goto error_return; 1580 } 1581 if (bfd_bread (buf, 4, abfd) != 4) 1582 goto error_return; 1583 1584 mmo_xore_32 (sec, vma, bfd_get_32 (abfd, buf)); 1585 vma += 4; 1586 vma &= ~3; 1587 lineno++; 1588 break; 1589 1590 case LOP_LOC: 1591 /* Set vma (and section). */ 1592 vma = (bfd_vma) y << 56; 1593 if (z == 1) 1594 { 1595 /* Get a 32-bit value. */ 1596 if (bfd_bread (buf, 4, abfd) != 4) 1597 goto error_return; 1598 1599 vma += bfd_get_32 (abfd, buf); 1600 } 1601 else if (z == 2) 1602 { 1603 /* Get a 64-bit value. */ 1604 if (bfd_bread (buf, 8, abfd) != 8) 1605 goto error_return; 1606 1607 vma += bfd_get_64 (abfd, buf); 1608 } 1609 else 1610 { 1611 (*_bfd_error_handler) 1612 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_loc\n"), 1613 bfd_get_filename (abfd), z); 1614 bfd_set_error (bfd_error_bad_value); 1615 goto error_return; 1616 } 1617 1618 sec = mmo_decide_section (abfd, vma); 1619 if (sec == NULL) 1620 goto error_return; 1621 break; 1622 1623 case LOP_SKIP: 1624 /* Move forward within the same section. */ 1625 vma += y * 256 + z; 1626 1627 sec = mmo_decide_section (abfd, vma); 1628 if (sec == NULL) 1629 goto error_return; 1630 break; 1631 1632 case LOP_FIXO: 1633 /* A fixup: Store the current vma somewhere. Position using 1634 same format as LOP_LOC. */ 1635 { 1636 bfd_vma p = (bfd_vma) y << 56; 1637 asection *fixosec; 1638 1639 if (z == 1) 1640 { 1641 /* Get a 32-bit value. */ 1642 if (bfd_bread (buf, 4, abfd) != 4) 1643 goto error_return; 1644 1645 p += bfd_get_32 (abfd, buf); 1646 } 1647 else if (z == 2) 1648 { 1649 /* Get a 64-bit value. */ 1650 if (bfd_bread (buf, 8, abfd) != 8) 1651 goto error_return; 1652 1653 p += bfd_get_64 (abfd, buf); 1654 } 1655 else 1656 { 1657 (*_bfd_error_handler) 1658 (_("%s: invalid mmo file: expected z = 1 or z = 2, got z = %d for lop_fixo\n"), 1659 bfd_get_filename (abfd), z); 1660 bfd_set_error (bfd_error_bad_value); 1661 goto error_return; 1662 } 1663 1664 /* The section where we store this address might be a 1665 different one than the current section. */ 1666 fixosec = mmo_decide_section (abfd, p); 1667 if (fixosec == NULL) 1668 goto error_return; 1669 mmo_xore_64 (fixosec, p, vma); 1670 } 1671 break; 1672 1673 case LOP_FIXR: 1674 /* A fixup: Store YZ of this lopcode into YZ at vma - 4 * yz. */ 1675 { 1676 unsigned int yz = (y * 256 + z); 1677 bfd_vma p = vma + 2 - 4 * yz; 1678 asection *fixrsec = mmo_decide_section (abfd, p); 1679 if (fixrsec == NULL) 1680 goto error_return; 1681 mmo_xore_16 (fixrsec, p, yz); 1682 } 1683 break; 1684 1685 case LOP_FIXRX: 1686 /* A fixup, similar to lop_fixr, but taking larger numbers 1687 and can change branches into the opposite direction 1688 (gasp!). */ 1689 { 1690 bfd_vma delta; 1691 bfd_vma p; 1692 asection *fixrsec; 1693 1694 if (y != 0) 1695 { 1696 (*_bfd_error_handler) 1697 (_("%s: invalid mmo file: expected y = 0, got y = %d for lop_fixrx\n"), 1698 bfd_get_filename (abfd), y); 1699 bfd_set_error (bfd_error_bad_value); 1700 goto error_return; 1701 } 1702 1703 if (z != 16 && z != 24) 1704 { 1705 (*_bfd_error_handler) 1706 (_("%s: invalid mmo file: expected z = 16 or z = 24, got z = %d for lop_fixrx\n"), 1707 bfd_get_filename (abfd), z); 1708 bfd_set_error (bfd_error_bad_value); 1709 goto error_return; 1710 } 1711 1712 /* Get the next 32-bit value. */ 1713 if (bfd_bread (buf, 4, abfd) != 4) 1714 goto error_return; 1715 1716 delta = bfd_get_32 (abfd, buf); 1717 1718 /* Do an, ehm, involved calculation for the location of 1719 the fixup. See mmixal documentation for a verbose 1720 explanation. We follow it verbosely here for the 1721 readers delight. */ 1722 if (buf[0] == 0) 1723 p = vma - 4 * delta; 1724 else if (buf[0] == 1) 1725 p = vma - 4 * ((delta & 0xffffff) - (1 << z)); 1726 else 1727 { 1728 (*_bfd_error_handler) 1729 (_("%s: invalid mmo file: leading byte of operand word must be 0 or 1, got %d for lop_fixrx\n"), 1730 bfd_get_filename (abfd), buf[0]); 1731 bfd_set_error (bfd_error_bad_value); 1732 goto error_return; 1733 } 1734 1735 fixrsec = mmo_decide_section (abfd, vma); 1736 if (fixrsec == NULL) 1737 goto error_return; 1738 mmo_xore_32 (fixrsec, p, delta); 1739 } 1740 break; 1741 1742 case LOP_FILE: 1743 /* Set current file and perhaps the file name. Reset line 1744 number. */ 1745 if (z != 0) 1746 { 1747 char *fname = bfd_malloc (z * 4 + 1); 1748 1749 if (fname == NULL) 1750 { 1751 (*_bfd_error_handler) 1752 (_("%s: cannot allocate file name for file number %d, %d bytes\n"), 1753 bfd_get_filename (abfd), y, z * 4 + 1); 1754 bfd_set_error (bfd_error_system_call); 1755 goto error_return; 1756 } 1757 1758 fname[z * 4] = 0; 1759 1760 for (i = 0; i < z; i++) 1761 { 1762 if (bfd_bread (fname + i * 4, 4, abfd) != 4) 1763 { 1764 free (fname); 1765 goto error_return; 1766 } 1767 } 1768 1769 if (file_names[y] != NULL) 1770 { 1771 (*_bfd_error_handler) 1772 (_("%s: invalid mmo file: file number %d `%s'," 1773 " was already entered as `%s'\n"), 1774 bfd_get_filename (abfd), y, fname, file_names[y]); 1775 bfd_set_error (bfd_error_bad_value); 1776 goto error_return; 1777 } 1778 1779 file_names[y] = fname; 1780 } 1781 1782 if (file_names[y] == NULL) 1783 { 1784 (*_bfd_error_handler) 1785 (_("%s: invalid mmo file: file name for number %d" 1786 " was not specified before use\n"), 1787 bfd_get_filename (abfd), y); 1788 bfd_set_error (bfd_error_bad_value); 1789 goto error_return; 1790 } 1791 1792 current_filename = file_names[y]; 1793 lineno = 0; 1794 break; 1795 1796 case LOP_LINE: 1797 /* Set line number. */ 1798 lineno = y * 256 + z; 1799 /* FIXME: Create a sequence of mmo-specific line number 1800 entries for each section, then translate into canonical 1801 format. */ 1802 break; 1803 1804 case LOP_SPEC: 1805 /* Special data follows until the next non-lop_quote 1806 lopcode. */ 1807 non_spec_sec = sec; 1808 non_spec_vma = vma; 1809 sec = mmo_get_spec_section (abfd, y * 256 + z); 1810 if (sec == NULL) 1811 goto error_return; 1812 1813 vma = sec->vma; 1814 break; 1815 1816 case LOP_PRE: 1817 { 1818 /* We ignore header information, except we read in the 1819 creation time from the first 32-bit word with the time 1820 in seconds since era. */ 1821 if (z >= 1 1822 && bfd_bread (abfd->tdata.mmo_data->created, 4, 1823 abfd) != 4) 1824 goto error_return; 1825 1826 for (i = 1; i < z; i++) 1827 if (bfd_bread (buf, 4, abfd) != 4) 1828 goto error_return; 1829 } 1830 break; 1831 1832 case LOP_POST: 1833 /* This tells of the contents of registers $Z..$255 at 1834 startup. We make a section out of it, with VMA = Z * 8, 1835 but only if Z != 255 or the contents is non-zero. */ 1836 { 1837 asection *rsec; 1838 bfd_byte *loc; 1839 bfd_vma first_octa; 1840 bfd_vma startaddr_octa; 1841 1842 /* Read first octaword outside loop to simplify logic when 1843 excluding the Z == 255, octa == 0 case. */ 1844 if (bfd_bread (buf, 8, abfd) != 8) 1845 goto error_return; 1846 1847 first_octa = bfd_get_64 (abfd, buf); 1848 1849 /* Don't emit contents for the trivial case which is 1850 always present; $255 pointing to Main. */ 1851 if (z != 255) 1852 { 1853 rsec 1854 = bfd_make_section_old_way (abfd, 1855 MMIX_REG_CONTENTS_SECTION_NAME); 1856 rsec->flags |= SEC_LINKER_CREATED; 1857 rsec->vma = z * 8; 1858 loc = mmo_get_loc (rsec, z * 8, (255 - z) * 8); 1859 bfd_put_64 (abfd, first_octa, loc); 1860 1861 for (i = z + 1; i < 255; i++) 1862 { 1863 if (bfd_bread (loc + (i - z) * 8, 8, abfd) != 8) 1864 goto error_return; 1865 } 1866 1867 /* Read out the last octabyte, and use it to set the 1868 start address. */ 1869 if (bfd_bread (buf, 8, abfd) != 8) 1870 goto error_return; 1871 1872 startaddr_octa = bfd_get_64 (abfd, buf); 1873 } 1874 else 1875 startaddr_octa = first_octa; 1876 1877 if (! bfd_set_start_address (abfd, startaddr_octa)) 1878 { 1879 /* Currently this can't fail, but this should handle 1880 future failures. */ 1881 bfd_set_error (bfd_error_bad_value); 1882 goto error_return; 1883 } 1884 } 1885 break; 1886 1887 case LOP_STAB: 1888 /* We read in the symbols now, not later. */ 1889 if (y != 0 || z != 0) 1890 { 1891 (*_bfd_error_handler) 1892 (_("%s: invalid mmo file: fields y and z of lop_stab" 1893 " non-zero, y: %d, z: %d\n"), 1894 bfd_get_filename (abfd), y, z); 1895 bfd_set_error (bfd_error_bad_value); 1896 goto error_return; 1897 } 1898 1899 /* Save the location, so we can check that YZ in the LOP_END 1900 is correct. */ 1901 stab_loc = bfd_tell (abfd); 1902 1903 /* It's not said that an MMO can be without symbols (though 1904 mmixal will refuse to assemble files without Main), but 1905 it seems it would still be a valid mmo-file, so allow it. 1906 We detect the absence of a symbol area in that the upper 1907 limit is computed (from the lop_end YZ field) as 0. 1908 Don't call mmo_get_symbols; it can only detect the end of 1909 a valid symbol trie, not the absence of one. */ 1910 if (abfd->tdata.mmo_data->max_symbol_length != 0 1911 && ! mmo_get_symbols (abfd)) 1912 goto error_return; 1913 break; 1914 1915 case LOP_END: 1916 { 1917 /* This must be the last 32-bit word in an mmo file. 1918 Let's find out. */ 1919 struct stat statbuf; 1920 file_ptr curpos = bfd_tell (abfd); 1921 1922 if (bfd_stat (abfd, &statbuf) < 0) 1923 goto error_return; 1924 1925 if (statbuf.st_size != curpos) 1926 { 1927 (*_bfd_error_handler) 1928 (_("%s: invalid mmo file: lop_end not last item in" 1929 " file\n"), 1930 bfd_get_filename (abfd)); 1931 bfd_set_error (bfd_error_bad_value); 1932 goto error_return; 1933 } 1934 1935 /* Check that the YZ field is right. Subtract the size of 1936 this LOP_END in the calculation; YZ does not include 1937 it. */ 1938 if ((long) (y * 256 + z) * 4 != (curpos - stab_loc) - 4) 1939 { 1940 (*_bfd_error_handler) 1941 (_("%s: invalid mmo file: YZ of lop_end (%ld)" 1942 " not equal to the number of tetras to the preceding" 1943 " lop_stab (%ld)\n"), 1944 bfd_get_filename (abfd), (long) (y * 256 + z), 1945 (curpos - stab_loc - 4)/4); 1946 bfd_set_error (bfd_error_bad_value); 1947 goto error_return; 1948 } 1949 1950 bfd_map_over_sections (abfd, mmo_map_set_sizes, NULL); 1951 goto done; 1952 } 1953 } 1954 } 1955 else 1956 { 1957 /* This wasn't a lopcode, so store it in the current section. */ 1958 mmo_xore_32 (sec, vma & ~3, bfd_get_32 (abfd, buf)); 1959 vma += 4; 1960 vma &= ~3; 1961 lineno++; 1962 } 1963 } 1964 1965 /* We know this file is a multiple of four bytes (checked in 1966 mmo_object_p), so if we got something other than 0, this was a bad 1967 file (although it's more likely we'll get 0 in that case too). 1968 If we got end-of-file, then there was no lop_stab, so the file has 1969 invalid format. */ 1970 1971 if (nbytes_read != 0) 1972 bfd_set_error (bfd_error_system_call); 1973 else 1974 bfd_set_error (bfd_error_bad_value); 1975 1976 error_return: 1977 error = TRUE; 1978 done: 1979 /* Mark the .text and .data section with their normal attribute if they 1980 contain anything. This is not redundant wrt. mmo_decide_section, 1981 since that code might never execute, and conversely the alloc+code 1982 section flags must be set then. */ 1983 sec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 1984 if (sec != NULL 1985 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 1986 && ! bfd_set_section_flags (abfd, sec, 1987 bfd_get_section_flags (abfd, sec) 1988 | SEC_ALLOC | SEC_LOAD | SEC_CODE)) 1989 error = TRUE; 1990 1991 sec = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 1992 if (sec != NULL 1993 && (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 1994 && ! bfd_set_section_flags (abfd, sec, 1995 bfd_get_section_flags (abfd, sec) 1996 | SEC_ALLOC | SEC_LOAD)) 1997 error = TRUE; 1998 1999 /* Free whatever resources we took. */ 2000 for (i = 0; i < sizeof (file_names) / sizeof (file_names[0]); i++) 2001 if (file_names[i]) 2002 free (file_names[i]); 2003 return ! error; 2004} 2005 2006/* A hook to set up object file dependent section information. For mmo, 2007 we point out the shape of allocated section contents. */ 2008 2009static bfd_boolean 2010mmo_new_section_hook (bfd *abfd, asection *newsect) 2011{ 2012 if (!newsect->used_by_bfd) 2013 { 2014 /* We zero-fill all fields and assume NULL is represented by an all 2015 zero-bit pattern. */ 2016 newsect->used_by_bfd 2017 = bfd_zalloc (abfd, sizeof (struct mmo_section_data_struct)); 2018 if (!newsect->used_by_bfd) 2019 return FALSE; 2020 } 2021 2022 /* Always align to at least 32-bit words. */ 2023 newsect->alignment_power = 2; 2024 return _bfd_generic_new_section_hook (abfd, newsect); 2025} 2026 2027/* We already have section contents loaded for sections that have 2028 contents. */ 2029 2030static bfd_boolean 2031mmo_get_section_contents (bfd *abfd ATTRIBUTE_UNUSED, 2032 asection *sec, 2033 void * location, 2034 file_ptr offset, 2035 bfd_size_type bytes_to_do) 2036{ 2037 /* Iterate over diminishing chunk sizes, copying contents, like 2038 mmo_set_section_contents. */ 2039 while (bytes_to_do) 2040 { 2041 /* A minor song-and-dance to make sure we're not bitten by the 2042 distant possibility of the cast from bfd_vma to int making the 2043 chunk zero-sized. */ 2044 int chunk_size 2045 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; 2046 bfd_byte *loc; 2047 2048 do 2049 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); 2050 while (loc == NULL && (chunk_size /= 2) != 0); 2051 2052 if (chunk_size == 0) 2053 return FALSE; 2054 2055 memcpy (location, loc, chunk_size); 2056 2057 location += chunk_size; 2058 bytes_to_do -= chunk_size; 2059 offset += chunk_size; 2060 } 2061 return TRUE; 2062} 2063 2064/* Return the amount of memory needed to read the symbol table. */ 2065 2066static long 2067mmo_get_symtab_upper_bound (bfd *abfd) 2068{ 2069 return (abfd->symcount + 1) * sizeof (asymbol *); 2070} 2071 2072/* Sort mmo symbols by serial number. */ 2073 2074static int 2075mmo_sort_mmo_symbols (const void *arg1, const void *arg2) 2076{ 2077 const struct mmo_symbol *sym1 = *(const struct mmo_symbol **) arg1; 2078 const struct mmo_symbol *sym2 = *(const struct mmo_symbol **) arg2; 2079 2080 /* Sort by serial number first. */ 2081 if (sym1->serno < sym2->serno) 2082 return -1; 2083 else if (sym1->serno > sym2->serno) 2084 return 1; 2085 2086 /* Then sort by address of the table entries. */ 2087 return ((const char *) arg1 - (const char *) arg2); 2088} 2089 2090/* Translate the symbol table. */ 2091 2092static long 2093mmo_canonicalize_symtab (bfd *abfd, asymbol **alocation) 2094{ 2095 unsigned int symcount = bfd_get_symcount (abfd); 2096 asymbol *csymbols; 2097 unsigned int i; 2098 2099 csymbols = abfd->tdata.mmo_data->csymbols; 2100 if (csymbols == NULL) 2101 { 2102 asymbol *c; 2103 struct mmo_symbol *s; 2104 struct mmo_symbol **msp; 2105 2106 /* First we store the symbols into the table we'll return, then we 2107 qsort it on the serial number, with secondary on the address of 2108 the symbol, to preserve order if there would be non-unique serial 2109 numbers. */ 2110 for (s = abfd->tdata.mmo_data->symbols, 2111 msp = (struct mmo_symbol **) alocation; 2112 s != NULL; 2113 s = s->next, ++msp) 2114 *msp = s; 2115 2116 *msp = NULL; 2117 2118 qsort (alocation, symcount, sizeof (struct mmo_symbol *), 2119 mmo_sort_mmo_symbols); 2120 2121 csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol)); 2122 if (csymbols == NULL && symcount != 0) 2123 return FALSE; 2124 abfd->tdata.mmo_data->csymbols = csymbols; 2125 2126 for (msp = (struct mmo_symbol **) alocation, c = csymbols; 2127 *msp != NULL; 2128 msp++, ++c) 2129 { 2130 s = *msp; 2131 c->the_bfd = abfd; 2132 c->name = s->name; 2133 c->value = s->value; 2134 c->flags = BSF_GLOBAL; 2135 2136 if (s->sym_type == mmo_data_sym) 2137 { 2138 c->section 2139 = bfd_get_section_by_name (abfd, MMO_DATA_SECTION_NAME); 2140 2141 if (c->section == NULL) 2142 c->section = bfd_abs_section_ptr; 2143 else 2144 c->value -= c->section->vma; 2145 } 2146 else if (s->sym_type == mmo_undef_sym) 2147 c->section = bfd_und_section_ptr; 2148 else if (s->sym_type == mmo_reg_sym) 2149 { 2150 c->section 2151 = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); 2152 c->section->flags |= SEC_LINKER_CREATED; 2153 } 2154 else 2155 { 2156 asection *textsec 2157 = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); 2158 asection *datasec; 2159 2160 if (textsec != NULL 2161 && c->value >= textsec->vma 2162 && c->value <= textsec->vma + textsec->size) 2163 { 2164 c->section = textsec; 2165 c->value -= c->section->vma; 2166 } 2167 /* In mmo, symbol types depend on the VMA. Therefore, if 2168 the data section isn't within the usual bounds, its 2169 symbols are marked as absolute. Correct that. This 2170 means we can't have absolute symbols with values matching 2171 data section addresses, but we also can't have with 2172 absolute symbols with values matching text section 2173 addresses. For such needs, use the ELF format. */ 2174 else if ((datasec 2175 = bfd_get_section_by_name (abfd, 2176 MMO_DATA_SECTION_NAME)) 2177 != NULL 2178 && c->value >= datasec->vma 2179 && c->value <= datasec->vma + datasec->size) 2180 { 2181 c->section = datasec; 2182 c->value -= c->section->vma; 2183 } 2184 else 2185 c->section = bfd_abs_section_ptr; 2186 } 2187 2188 c->udata.p = NULL; 2189 } 2190 } 2191 2192 /* Last, overwrite the incoming table with the right-type entries. */ 2193 for (i = 0; i < symcount; i++) 2194 *alocation++ = csymbols++; 2195 *alocation = NULL; 2196 2197 return symcount; 2198} 2199 2200/* Get information about a symbol. */ 2201 2202static void 2203mmo_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, 2204 asymbol *symbol, symbol_info *ret) 2205{ 2206 bfd_symbol_info (symbol, ret); 2207} 2208 2209static void 2210mmo_print_symbol (bfd *abfd, void *afile, asymbol *symbol, 2211 bfd_print_symbol_type how) 2212{ 2213 FILE *file = (FILE *) afile; 2214 2215 switch (how) 2216 { 2217 case bfd_print_symbol_name: 2218 fprintf (file, "%s", symbol->name); 2219 break; 2220 default: 2221 bfd_print_symbol_vandf (abfd, file, symbol); 2222 2223 fprintf (file, " %-5s %s", 2224 symbol->section->name, 2225 symbol->name); 2226 } 2227} 2228 2229/* We can't map a file directly into executable code, so the 2230 size of header information is irrelevant. */ 2231 2232static int 2233mmo_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, 2234 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2235{ 2236 return 0; 2237} 2238 2239/* Write the (section-neutral) file preamble. */ 2240 2241static bfd_boolean 2242mmo_internal_write_header (bfd *abfd) 2243{ 2244 const char lop_pre_bfd[] = { LOP, LOP_PRE, 1, 1}; 2245 2246 if (bfd_bwrite (lop_pre_bfd, 4, abfd) != 4) 2247 return FALSE; 2248 2249 /* Copy creation time of original file. */ 2250 if (bfd_bwrite (abfd->tdata.mmo_data->created, 4, abfd) != 4) 2251 return FALSE; 2252 2253 return TRUE; 2254} 2255 2256/* Write the LOP_POST record, with global register initializations. 2257 Z is the Z field of the LOP_POST, corresponding to 255 - number of 2258 registers at DATA. The Z = 255 field is filled in with the 2259 start-address. */ 2260 2261static bfd_boolean 2262mmo_internal_write_post (bfd *abfd, int z, asection *sec) 2263{ 2264 int i; 2265 bfd_byte buf[8]; 2266 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_POST << 16) | z); 2267 2268 for (i = z; i < 255; i++) 2269 { 2270 bfd_byte *data = mmo_get_loc (sec, i * 8, 8); 2271 2272 if (bfd_bwrite (data, 8, abfd) != 8) 2273 return FALSE; 2274 } 2275 2276 /* For Z == $255, we always emit the start location; supposedly Main, 2277 but we have it handy at bfd_get_start_address. If we're called with 2278 Z == 255, don't assume DATA is valid. */ 2279 bfd_put_64 (abfd, bfd_get_start_address (abfd), buf); 2280 2281 return ! abfd->tdata.mmo_data->have_error && bfd_bwrite (buf, 8, abfd) == 8; 2282} 2283 2284/* Translate to and from BFD flags. This is to make sure that we don't 2285 get bitten by BFD flag number changes. */ 2286 2287static flagword 2288mmo_sec_flags_from_bfd_flags (flagword flags) 2289{ 2290 flagword oflags = 0; 2291 2292 if (flags & SEC_ALLOC) 2293 oflags |= MMO_SEC_ALLOC; 2294 if (flags & SEC_LOAD) 2295 oflags |= MMO_SEC_LOAD; 2296 if (flags & SEC_RELOC) 2297 oflags |= MMO_SEC_RELOC; 2298 if (flags & SEC_READONLY) 2299 oflags |= MMO_SEC_READONLY; 2300 if (flags & SEC_CODE) 2301 oflags |= MMO_SEC_CODE; 2302 if (flags & SEC_DATA) 2303 oflags |= MMO_SEC_DATA; 2304 if (flags & SEC_NEVER_LOAD) 2305 oflags |= MMO_SEC_NEVER_LOAD; 2306 if (flags & SEC_IS_COMMON) 2307 oflags |= MMO_SEC_IS_COMMON; 2308 if (flags & SEC_DEBUGGING) 2309 oflags |= MMO_SEC_DEBUGGING; 2310 2311 return oflags; 2312} 2313 2314static flagword 2315bfd_sec_flags_from_mmo_flags (flagword flags) 2316{ 2317 flagword oflags = 0; 2318 2319 if (flags & MMO_SEC_ALLOC) 2320 oflags |= SEC_ALLOC; 2321 if (flags & MMO_SEC_LOAD) 2322 oflags |= SEC_LOAD; 2323 if (flags & MMO_SEC_RELOC) 2324 oflags |= SEC_RELOC; 2325 if (flags & MMO_SEC_READONLY) 2326 oflags |= SEC_READONLY; 2327 if (flags & MMO_SEC_CODE) 2328 oflags |= SEC_CODE; 2329 if (flags & MMO_SEC_DATA) 2330 oflags |= SEC_DATA; 2331 if (flags & MMO_SEC_NEVER_LOAD) 2332 oflags |= SEC_NEVER_LOAD; 2333 if (flags & MMO_SEC_IS_COMMON) 2334 oflags |= SEC_IS_COMMON; 2335 if (flags & MMO_SEC_DEBUGGING) 2336 oflags |= SEC_DEBUGGING; 2337 2338 return oflags; 2339} 2340 2341/* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and 2342 is 0. */ 2343 2344static bfd_boolean 2345mmo_has_leading_or_trailing_zero_tetra_p (bfd *abfd, asection *sec) 2346{ 2347 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2348 2349 if (sec->size < 4) 2350 return FALSE; 2351 2352 if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 2353 && bfd_get_32 (abfd, 2354 mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) 2355 return TRUE; 2356 2357 return FALSE; 2358} 2359 2360/* Write a section. */ 2361 2362static bfd_boolean 2363mmo_internal_write_section (bfd *abfd, asection *sec) 2364{ 2365 /* We do it differently depending on what section this is: 2366 2367 ".text": Output, prepended by information about the first source file 2368 (not yet implemented.) 2369 2370 ".data": Output. 2371 2372 (".MMIX.reg_contents": Not handled here.) 2373 2374 Anything else: Output inside a lop_spec 80, in the format described 2375 above. */ 2376 2377 if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) 2378 { 2379 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2380 2381 /* Because leading and trailing zeros are omitted in output, we need to 2382 specify the section boundaries so they're correct when the file 2383 is read in again. That's also the case if this section is 2384 specified as not within its usual boundaries or alignments. */ 2385 if (sec->size != 0 2386 && (secaddr + sec->size >= (bfd_vma) 1 << 56 2387 || (secaddr & 3) != 0 2388 || (sec->size & 3) != 0 2389 || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) 2390 { 2391 if (!mmo_write_section_description (abfd, sec)) 2392 return FALSE; 2393 } 2394 2395 /* FIXME: Output source file name and line number. */ 2396 return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); 2397 } 2398 else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) 2399 { 2400 bfd_vma secaddr = bfd_get_section_vma (abfd, sec); 2401 2402 /* Same goes as for MMO_TEXT_SECTION_NAME above. */ 2403 if (sec->size != 0 2404 && (secaddr < (bfd_vma) 0x20 << 56 2405 || secaddr + sec->size >= (bfd_vma) 0x21 << 56 2406 || (secaddr & 3) != 0 2407 || (sec->size & 3) != 0 2408 || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) 2409 { 2410 if (!mmo_write_section_description (abfd, sec)) 2411 return FALSE; 2412 } 2413 2414 return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); 2415 } 2416 else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 2417 /* Not handled here. */ 2418 { 2419 /* This would normally be an abort call since this can't happen, but 2420 we don't do that. */ 2421 bfd_set_error (bfd_error_bad_value); 2422 return FALSE; 2423 } 2424 else if (CONST_STRNEQ (sec->name, MMIX_OTHER_SPEC_SECTION_PREFIX)) 2425 { 2426 int n = atoi (sec->name + strlen (MMIX_OTHER_SPEC_SECTION_PREFIX)); 2427 2428 mmo_write_tetra_raw (abfd, (LOP << 24) | (LOP_SPEC << 16) | n); 2429 return (! abfd->tdata.mmo_data->have_error 2430 && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); 2431 } 2432 /* Ignore sections that are just allocated or empty; we write out 2433 _contents_ here. */ 2434 else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 2435 && sec->size != 0) 2436 { 2437 if (!mmo_write_section_description (abfd, sec)) 2438 return FALSE; 2439 2440 /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually 2441 loaded. */ 2442 if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) 2443 return (! abfd->tdata.mmo_data->have_error 2444 && mmo_write_loc_chunk_list (abfd, 2445 mmo_section_data (sec)->head)); 2446 return (! abfd->tdata.mmo_data->have_error 2447 && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); 2448 } 2449 2450 /* Some section without contents. */ 2451 return TRUE; 2452} 2453 2454/* Write the description of a section, extended-mmo-style. */ 2455 2456static bfd_boolean 2457mmo_write_section_description (bfd *abfd, asection *sec) 2458{ 2459 /* Keep the following document-comment formatted the way it is. */ 2460/* 2461INODE 2462mmo section mapping, , Symbol-table, mmo 2463SUBSECTION 2464 mmo section mapping 2465 2466 The implementation in BFD uses special data type 80 (decimal) to 2467 encapsulate and describe named sections, containing e.g.@: debug 2468 information. If needed, any datum in the encapsulation will be 2469 quoted using lop_quote. First comes a 32-bit word holding the 2470 number of 32-bit words containing the zero-terminated zero-padded 2471 segment name. After the name there's a 32-bit word holding flags 2472 describing the section type. Then comes a 64-bit big-endian word 2473 with the section length (in bytes), then another with the section 2474 start address. Depending on the type of section, the contents 2475 might follow, zero-padded to 32-bit boundary. For a loadable 2476 section (such as data or code), the contents might follow at some 2477 later point, not necessarily immediately, as a lop_loc with the 2478 same start address as in the section description, followed by the 2479 contents. This in effect forms a descriptor that must be emitted 2480 before the actual contents. Sections described this way must not 2481 overlap. 2482 2483 For areas that don't have such descriptors, synthetic sections are 2484 formed by BFD. Consecutive contents in the two memory areas 2485 @samp{0x0000@dots{}00} to @samp{0x01ff@dots{}ff} and 2486 @samp{0x2000@dots{}00} to @samp{0x20ff@dots{}ff} are entered in 2487 sections named <<.text>> and <<.data>> respectively. If an area 2488 is not otherwise described, but would together with a neighboring 2489 lower area be less than @samp{0x40000000} bytes long, it is joined 2490 with the lower area and the gap is zero-filled. For other cases, 2491 a new section is formed, named <<.MMIX.sec.@var{n}>>. Here, 2492 @var{n} is a number, a running count through the mmo file, 2493 starting at 0. 2494 2495EXAMPLE 2496 A loadable section specified as: 2497 2498| .section secname,"ax" 2499| TETRA 1,2,3,4,-1,-2009 2500| BYTE 80 2501 2502 and linked to address @samp{0x4}, is represented by the sequence: 2503 2504| 0x98080050 - lop_spec 80 2505| 0x00000002 - two 32-bit words for the section name 2506| 0x7365636e - "secn" 2507| 0x616d6500 - "ame\0" 2508| 0x00000033 - flags CODE, READONLY, LOAD, ALLOC 2509| 0x00000000 - high 32 bits of section length 2510| 0x0000001c - section length is 28 bytes; 6 * 4 + 1 + alignment to 32 bits 2511| 0x00000000 - high 32 bits of section address 2512| 0x00000004 - section address is 4 2513| 0x98010002 - 64 bits with address of following data 2514| 0x00000000 - high 32 bits of address 2515| 0x00000004 - low 32 bits: data starts at address 4 2516| 0x00000001 - 1 2517| 0x00000002 - 2 2518| 0x00000003 - 3 2519| 0x00000004 - 4 2520| 0xffffffff - -1 2521| 0xfffff827 - -2009 2522| 0x50000000 - 80 as a byte, padded with zeros. 2523 2524 Note that the lop_spec wrapping does not include the section 2525 contents. Compare this to a non-loaded section specified as: 2526 2527| .section thirdsec 2528| TETRA 200001,100002 2529| BYTE 38,40 2530 2531 This, when linked to address @samp{0x200000000000001c}, is 2532 represented by: 2533 2534| 0x98080050 - lop_spec 80 2535| 0x00000002 - two 32-bit words for the section name 2536| 0x7365636e - "thir" 2537| 0x616d6500 - "dsec" 2538| 0x00000010 - flag READONLY 2539| 0x00000000 - high 32 bits of section length 2540| 0x0000000c - section length is 12 bytes; 2 * 4 + 2 + alignment to 32 bits 2541| 0x20000000 - high 32 bits of address 2542| 0x0000001c - low 32 bits of address 0x200000000000001c 2543| 0x00030d41 - 200001 2544| 0x000186a2 - 100002 2545| 0x26280000 - 38, 40 as bytes, padded with zeros 2546 2547 For the latter example, the section contents must not be 2548 loaded in memory, and is therefore specified as part of the 2549 special data. The address is usually unimportant but might 2550 provide information for e.g.@: the DWARF 2 debugging format. */ 2551 2552 mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); 2553 mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); 2554 mmo_write_chunk (abfd, (bfd_byte *) sec->name, strlen (sec->name)); 2555 mmo_flush_chunk (abfd); 2556 /* FIXME: We can get debug sections (.debug_line & Co.) with a section 2557 flag still having SEC_RELOC set. Investigate. This might be true 2558 for all alien sections; perhaps mmo.em should clear that flag. Might 2559 be related to weak references. */ 2560 mmo_write_tetra (abfd, 2561 mmo_sec_flags_from_bfd_flags 2562 (bfd_get_section_flags (abfd, sec))); 2563 mmo_write_octa (abfd, sec->size); 2564 mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); 2565 return TRUE; 2566} 2567 2568/* We save up all data before output. */ 2569 2570static bfd_boolean 2571mmo_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED, sec_ptr sec, 2572 const void *location, file_ptr offset, 2573 bfd_size_type bytes_to_do) 2574{ 2575 /* Iterate over diminishing chunk sizes, copying contents. */ 2576 while (bytes_to_do) 2577 { 2578 /* A minor song-and-dance to make sure we're not bitten by the 2579 distant possibility of the cast from bfd_vma to int making the 2580 chunk zero-sized. */ 2581 int chunk_size 2582 = (int) bytes_to_do != 0 ? bytes_to_do : MMO_SEC_CONTENTS_CHUNK_SIZE; 2583 bfd_byte *loc; 2584 2585 do 2586 loc = mmo_get_loc (sec, sec->vma + offset, chunk_size); 2587 while (loc == NULL && (chunk_size /= 2) != 0); 2588 2589 if (chunk_size == 0) 2590 return FALSE; 2591 2592 memcpy (loc, location, chunk_size); 2593 2594 location += chunk_size; 2595 bytes_to_do -= chunk_size; 2596 offset += chunk_size; 2597 } 2598 return TRUE; 2599} 2600 2601/* Add a symbol to a trie-tree. */ 2602 2603static bfd_boolean 2604mmo_internal_add_3_sym (bfd *abfd, struct mmo_symbol_trie *rootp, 2605 const struct mmo_symbol *symp) 2606{ 2607 const char *name = symp->name; 2608 struct mmo_symbol_trie *trie = rootp; 2609 struct mmo_symbol_trie **triep = NULL; 2610 2611 while (*name && trie != NULL) 2612 { 2613 if (*name < trie->symchar) 2614 { 2615 triep = &trie->left; 2616 trie = trie->left; 2617 } 2618 else if (*name > trie->symchar) 2619 { 2620 triep = &trie->right; 2621 trie = trie->right; 2622 } 2623 else if (*name == trie->symchar) 2624 { 2625 triep = &trie->middle; 2626 name++; 2627 2628 /* Make sure "trie" points to where we should fill in the 2629 current symbol whenever we've iterated through "name". We 2630 would lose the right position if we encounter "foobar" then 2631 "foo". */ 2632 if (*name) 2633 trie = trie->middle; 2634 } 2635 } 2636 2637 while (*name != 0) 2638 { 2639 /* Create middle branches for the rest of the characters. */ 2640 trie = bfd_zalloc (abfd, sizeof (struct mmo_symbol_trie)); 2641 *triep = trie; 2642 trie->symchar = *name++; 2643 triep = &trie->middle; 2644 } 2645 2646 /* We discover a duplicate symbol rather late in the process, but still; 2647 we discover it and bail out. */ 2648 if (trie->sym.name != NULL) 2649 { 2650 (*_bfd_error_handler) 2651 (_("%s: invalid symbol table: duplicate symbol `%s'\n"), 2652 bfd_get_filename (abfd), trie->sym.name); 2653 bfd_set_error (bfd_error_bad_value); 2654 return FALSE; 2655 } 2656 2657 memcpy (&trie->sym, symp, sizeof *symp); 2658 return TRUE; 2659} 2660 2661/* Find out the length of the serialized version of a trie in bytes. */ 2662 2663static unsigned int 2664mmo_internal_3_length (bfd *abfd, struct mmo_symbol_trie *trie) 2665{ 2666 /* First, one for the control byte. */ 2667 unsigned int length = 1; 2668 2669 if (trie == NULL) 2670 return 0; 2671 2672 /* Add in the recursion to the left. */ 2673 length += mmo_internal_3_length (abfd, trie->left); 2674 2675 /* Add in the middle trie and the character. */ 2676 length += 1 + mmo_internal_3_length (abfd, trie->middle); 2677 2678 /* Add in the recursion to the right. */ 2679 length += mmo_internal_3_length (abfd, trie->right); 2680 2681 /* Add in bytes for the symbol (if this is an endnode). */ 2682 if (trie->sym.name != NULL) 2683 { 2684 unsigned int serno = trie->sym.serno; 2685 2686 /* First what it takes to encode the value. */ 2687 if (trie->sym.sym_type == mmo_reg_sym) 2688 length++; 2689 else if (trie->sym.sym_type == mmo_undef_sym) 2690 length += 2; 2691 else 2692 { 2693 bfd_vma value = trie->sym.value; 2694 2695 /* Coded in one to eight following bytes. */ 2696 if (trie->sym.sym_type == mmo_data_sym) 2697 value -= (bfd_vma) 0x20 << 56; 2698 2699 do 2700 { 2701 value >>= 8; 2702 length++; 2703 } 2704 while (value != 0); 2705 } 2706 2707 /* Find out what it takes to encode the serial number. */ 2708 do 2709 { 2710 serno >>= 7; 2711 length++; 2712 } 2713 while (serno != 0); 2714 } 2715 2716 return length; 2717} 2718 2719/* Helper function for outputting the serial number of a symbol, output as 2720 a variant of leb128 (see dwarf2 documentation) which could be called 2721 beb128. Using a helper function and recursion simplifies debugging. */ 2722 2723static void 2724mmo_beb128_out (bfd *abfd, int serno, int marker) 2725{ 2726 if (serno & ~0x7f) 2727 mmo_beb128_out (abfd, serno >> 7, 0); 2728 mmo_write_byte (abfd, marker | (serno & 0x7f)); 2729} 2730 2731/* Serialize a trie. */ 2732 2733static void 2734mmo_internal_3_dump (bfd *abfd, struct mmo_symbol_trie *trie) 2735{ 2736 bfd_byte control = 0; 2737 2738 if (trie == NULL) 2739 return; 2740 2741 if (trie->left) 2742 control |= MMO3_LEFT; 2743 2744 if (trie->middle) 2745 control |= MMO3_MIDDLE; 2746 2747 if (trie->right) 2748 control |= MMO3_RIGHT; 2749 2750 if (trie->sym.name != NULL) 2751 { 2752 /* Encode the symbol type and length of value bytes. */ 2753 if (trie->sym.sym_type == mmo_reg_sym) 2754 control |= MMO3_REGQUAL_BITS; 2755 else if (trie->sym.sym_type == mmo_undef_sym) 2756 control |= MMO3_UNDEF; 2757 else 2758 { 2759 bfd_vma value = trie->sym.value; 2760 2761 /* Coded in 1..8 following bytes. */ 2762 if (trie->sym.sym_type == mmo_data_sym) 2763 { 2764 control |= MMO3_DATA; 2765 value -= (bfd_vma) 0x20 << 56; 2766 } 2767 2768 do 2769 { 2770 value >>= 8; 2771 control++; 2772 } 2773 while (value != 0); 2774 } 2775 } 2776 2777 /* The control byte is output before recursing. */ 2778 mmo_write_byte (abfd, control); 2779 2780 mmo_internal_3_dump (abfd, trie->left); 2781 2782 if (control & MMO3_SYMBITS) 2783 { 2784 mmo_write_byte (abfd, trie->symchar); 2785 2786 if (trie->sym.name != NULL) 2787 { 2788 if (trie->sym.sym_type == mmo_reg_sym) 2789 mmo_write_byte (abfd, trie->sym.value); 2790 else if (trie->sym.sym_type == mmo_undef_sym) 2791 { 2792 mmo_write_byte (abfd, 0); 2793 mmo_write_byte (abfd, 0); 2794 } 2795 else 2796 { 2797 bfd_vma value = trie->sym.value; 2798 2799 bfd_byte byte_n = control & 15; 2800 2801 /* Coded in 1..8 following bytes. Note that the value is 2802 shifted out big-endian. */ 2803 if (trie->sym.sym_type == mmo_data_sym) 2804 { 2805 value -= (bfd_vma) 0x20 << 56; 2806 byte_n -= 8; 2807 } 2808 2809 do 2810 { 2811 mmo_write_byte (abfd, (value >> ((byte_n - 1) * 8)) & 0xff); 2812 byte_n--; 2813 } 2814 while (byte_n != 0); 2815 } 2816 2817 mmo_beb128_out (abfd, trie->sym.serno, 128); 2818 } 2819 mmo_internal_3_dump (abfd, trie->middle); 2820 } 2821 mmo_internal_3_dump (abfd, trie->right); 2822} 2823 2824/* Write symbols in mmo format. Also write the lop_end terminator. */ 2825 2826static bfd_boolean 2827mmo_write_symbols_and_terminator (bfd *abfd) 2828{ 2829 int count = bfd_get_symcount (abfd); 2830 asymbol *maintable[2]; 2831 asymbol **table; 2832 asymbol **orig_table = bfd_get_outsymbols (abfd); 2833 int serno; 2834 struct mmo_symbol_trie root; 2835 int trie_len; 2836 int i; 2837 bfd_byte buf[4]; 2838 2839 /* Create a symbol for "Main". */ 2840 asymbol *fakemain = bfd_make_empty_symbol (abfd); 2841 2842 fakemain->flags = BSF_GLOBAL; 2843 fakemain->value = bfd_get_start_address (abfd); 2844 fakemain->name = MMIX_START_SYMBOL_NAME; 2845 fakemain->section = bfd_abs_section_ptr; 2846 maintable[0] = fakemain; 2847 maintable[1] = NULL; 2848 2849 memset (&root, 0, sizeof (root)); 2850 2851 /* Make all symbols take a left turn. */ 2852 root.symchar = 0xff; 2853 2854 /* There must always be a ":Main", so we'll add one if there are no 2855 symbols. Make sure we have room for it. */ 2856 table = bfd_alloc (abfd, (count + 1) * sizeof (asymbol *)); 2857 if (table == NULL) 2858 return FALSE; 2859 2860 memcpy (table, orig_table, count * sizeof (asymbol *)); 2861 2862 /* Move :Main (if there is one) to the first position. This is 2863 necessary to get the same layout of the trie-tree when linking as 2864 when objcopying the result as in the objcopy.exp test "simple objcopy 2865 of executable". It also automatically takes care of assigning serial 2866 number 1 to :Main (as is mandatory). */ 2867 for (i = 0; i < count; i++) 2868 if (table[i] != NULL 2869 && strcmp (table[i]->name, MMIX_START_SYMBOL_NAME) == 0 2870 && (table[i]->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL) 2871 { 2872 asymbol *mainsym = table[i]; 2873 memcpy (table + 1, orig_table, i * sizeof (asymbol *)); 2874 table[0] = mainsym; 2875 2876 /* Check that the value assigned to :Main is the same as the entry 2877 address. The default linker script asserts this. This is as 2878 good a place as any to check this consistency. */ 2879 if ((mainsym->value 2880 + mainsym->section->output_section->vma 2881 + mainsym->section->output_offset) 2882 != bfd_get_start_address (abfd)) 2883 { 2884 /* Arbitrary buffer to hold the printable representation of a 2885 vma. */ 2886 char vmas_main[40]; 2887 char vmas_start[40]; 2888 bfd_vma vma_start = bfd_get_start_address (abfd); 2889 2890 sprintf_vma (vmas_main, mainsym->value); 2891 sprintf_vma (vmas_start, vma_start); 2892 2893 (*_bfd_error_handler) 2894 (_("%s: Bad symbol definition: `Main' set to %s rather" 2895 " than the start address %s\n"), 2896 bfd_get_filename (abfd), vmas_main, vmas_start); 2897 bfd_set_error (bfd_error_bad_value); 2898 return FALSE; 2899 } 2900 break; 2901 } 2902 if (i == count && count != 0) 2903 { 2904 /* When there are symbols, there must be a :Main. There was no 2905 :Main, so we need to add it manually. */ 2906 memcpy (table + 1, orig_table, count * sizeof (asymbol *)); 2907 table[0] = fakemain; 2908 count++; 2909 } 2910 2911 for (i = 0, serno = 1; i < count && table[i] != NULL; i++) 2912 { 2913 asymbol *s = table[i]; 2914 2915 /* It's not enough to consult bfd_is_local_label, since it does not 2916 mean "local" in the sense of linkable-and-observable-after-link. 2917 Let's just check the BSF_GLOBAL flag. 2918 2919 Also, don't export symbols with characters not in the allowed set. */ 2920 if ((s->flags & (BSF_DEBUGGING|BSF_GLOBAL)) == BSF_GLOBAL 2921 && strspn (s->name, 2922 valid_mmo_symbol_character_set) == strlen (s->name)) 2923 { 2924 struct mmo_symbol sym; 2925 memset (&sym, 0, sizeof (sym)); 2926 2927 /* Need to strip const here; strdup:ing would leak and the 2928 existing string must be safe to reuse. */ 2929 sym.name = (char *) s->name; 2930 sym.value = 2931 s->value 2932 + s->section->output_section->vma 2933 + s->section->output_offset; 2934 2935 if (bfd_is_und_section (s->section)) 2936 sym.sym_type = mmo_undef_sym; 2937 else if (strcmp (s->section->name, MMO_DATA_SECTION_NAME) == 0 2938 /* The encoding of data symbols require that the "rest" 2939 of the value fits in 6 bytes, so the upper two bytes 2940 must be 0x2000. All other symbols get to be the 2941 absolute type. */ 2942 && (sym.value >> 48) == 0x2000) 2943 sym.sym_type = mmo_data_sym; 2944 else if (strcmp (s->section->name, MMIX_REG_SECTION_NAME) == 0) 2945 sym.sym_type = mmo_reg_sym; 2946 else if (strcmp (s->section->name, 2947 MMIX_REG_CONTENTS_SECTION_NAME) == 0) 2948 { 2949 sym.sym_type = mmo_reg_sym; 2950 sym.value /= 8; 2951 } 2952 else 2953 sym.sym_type = mmo_abs_sym; 2954 2955 /* FIXME: We assume the order of the received symbols is an 2956 ordered mapping of the serial numbers. This is not 2957 necessarily true if we e.g. objcopy a mmo file to another and 2958 there are gaps in the numbering. Not sure if this can 2959 happen. Not sure what to do. */ 2960 sym.serno = serno++; 2961 2962 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 2963 return FALSE; 2964 } 2965 } 2966 2967 /* Change the root node to be a ":"-prefix. */ 2968 root.symchar = ':'; 2969 root.middle = root.left; 2970 root.right = NULL; 2971 root.left = NULL; 2972 2973 /* We have to find out if we can fit the whole symbol table in the mmo 2974 symtab. It would be bad to assume we can always fit it in 262144 2975 bytes. If we can't, just leave the Main symbol. */ 2976 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 2977 2978 if (trie_len > 0xffff) 2979 { 2980 /* Test this code by using a lower limit in the test above and check 2981 that the single "Main" symbol is emitted and handled properly. 2982 There's no specific test-case. */ 2983 struct mmo_symbol sym; 2984 2985 (*_bfd_error_handler) 2986 (_("%s: warning: symbol table too large for mmo, larger than 65535" 2987 " 32-bit words: %d. Only `Main' will be emitted.\n"), 2988 bfd_get_filename (abfd), trie_len); 2989 2990 memset (&sym, 0, sizeof (sym)); 2991 sym.sym_type = mmo_abs_sym; 2992 sym.name = MMIX_START_SYMBOL_NAME; 2993 sym.serno = 1; 2994 sym.value = bfd_get_start_address (abfd); 2995 2996 /* Then patch up a symbol table to be just the ":Main" symbol. */ 2997 memset (&root, 0, sizeof (root)); 2998 root.left = root.middle; 2999 root.symchar = 0xff; 3000 root.middle = NULL; 3001 root.right = NULL; 3002 3003 if (! mmo_internal_add_3_sym (abfd, &root, &sym)) 3004 return FALSE; 3005 3006 root.symchar = ':'; 3007 root.middle = root.left; 3008 root.right = NULL; 3009 root.left = NULL; 3010 3011 trie_len = (mmo_internal_3_length (abfd, &root) + 3)/4; 3012 } 3013 3014 /* Reset the written-bytes counter. */ 3015 abfd->tdata.mmo_data->byte_no = 0; 3016 3017 /* Put out the lop_stab mark. */ 3018 bfd_put_32 (abfd, (LOP << 24) | (LOP_STAB << 16), buf); 3019 if (bfd_bwrite (buf, 4, abfd) != 4) 3020 return FALSE; 3021 3022 /* Dump out symbols. */ 3023 mmo_internal_3_dump (abfd, &root); 3024 3025 if (trie_len != (abfd->tdata.mmo_data->byte_no + 3)/4) 3026 { 3027 /* I haven't seen this trig. It seems no use claiming this case 3028 isn't debugged and abort if we get here. Instead emit a 3029 diagnostic and fail "normally". */ 3030 (*_bfd_error_handler) 3031 (_("%s: internal error, symbol table changed size from %d to %d" 3032 " words\n"), 3033 bfd_get_filename (abfd), trie_len, 3034 (abfd->tdata.mmo_data->byte_no + 3)/4); 3035 bfd_set_error (bfd_error_bad_value); 3036 return FALSE; 3037 } 3038 3039 /* Dump out remaining bytes in the buffer and handle I/O errors by 3040 propagating errors. */ 3041 if ((abfd->tdata.mmo_data->byte_no % 4) != 0 3042 || abfd->tdata.mmo_data->have_error) 3043 { 3044 memset (abfd->tdata.mmo_data->buf + (abfd->tdata.mmo_data->byte_no % 4), 3045 0, 4 - (abfd->tdata.mmo_data->byte_no % 4)); 3046 3047 if (abfd->tdata.mmo_data->have_error 3048 || bfd_bwrite (abfd->tdata.mmo_data->buf, 4, abfd) != 4) 3049 return FALSE; 3050 } 3051 3052 bfd_put_32 (abfd, (LOP << 24) | (LOP_END << 16) | trie_len, buf); 3053 return bfd_bwrite (buf, 4, abfd) == 4; 3054} 3055 3056/* Write section unless it is the register contents section. For that, we 3057 instead store the section in the supplied pointer. This function is 3058 used through bfd_map_over_sections. */ 3059 3060static void 3061mmo_write_section_unless_reg_contents (bfd *abfd, asection *sec, void *p) 3062{ 3063 struct mmo_write_sec_info *infop = (struct mmo_write_sec_info *) p; 3064 3065 if (! infop->retval) 3066 return; 3067 3068 if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) 3069 { 3070 infop->reg_section = sec; 3071 return; 3072 } 3073 3074 /* Exclude the convenience register section. */ 3075 if (strcmp (sec->name, MMIX_REG_SECTION_NAME) == 0) 3076 { 3077 if (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) 3078 { 3079 /* Make sure it hasn't got contents. It seems impossible to 3080 make it carry contents, so we don't have a test-case for 3081 this. */ 3082 (*_bfd_error_handler) 3083 (_("%s: internal error, internal register section %s had" 3084 " contents\n"), 3085 bfd_get_filename (abfd), sec->name); 3086 bfd_set_error (bfd_error_bad_value); 3087 infop->retval = FALSE; 3088 return; 3089 } 3090 3091 return; 3092 } 3093 3094 infop->retval = mmo_internal_write_section (abfd, sec); 3095} 3096 3097/* Do the actual output of a file. Assumes mmo_set_section_contents is 3098 already called. */ 3099 3100static bfd_boolean 3101mmo_write_object_contents (bfd *abfd) 3102{ 3103 struct mmo_write_sec_info wsecinfo; 3104 3105 /* First, there are a few words of preamble. */ 3106 if (! mmo_internal_write_header (abfd)) 3107 return FALSE; 3108 3109 wsecinfo.reg_section = NULL; 3110 wsecinfo.retval = TRUE; 3111 3112 bfd_map_over_sections (abfd, mmo_write_section_unless_reg_contents, 3113 &wsecinfo); 3114 3115 if (! wsecinfo.retval) 3116 return FALSE; 3117 3118 if (wsecinfo.reg_section != NULL) 3119 { 3120 asection *sec = wsecinfo.reg_section; 3121 unsigned int z = (unsigned int) (sec->vma / 8); 3122 3123 /* Registers 0..31 must not be global. Do sanity check on the "vma" 3124 of the register contents section and check that it corresponds to 3125 the length of the section. */ 3126 if (z < 32 || z >= 255 || (sec->vma & 7) != 0 3127 || sec->vma != 256 * 8 - sec->size - 8) 3128 { 3129 bfd_set_error (bfd_error_bad_value); 3130 3131 if (sec->size == 0) 3132 /* There must always be at least one such register. */ 3133 (*_bfd_error_handler) 3134 (_("%s: no initialized registers; section length 0\n"), 3135 bfd_get_filename (abfd)); 3136 else if (sec->vma > (256 - 32) * 8) 3137 /* Provide better error message for the case of too many 3138 global registers. */ 3139 (*_bfd_error_handler) 3140 (_("%s: too many initialized registers; section length %ld\n"), 3141 bfd_get_filename (abfd), 3142 (long) sec->size); 3143 else 3144 (*_bfd_error_handler) 3145 (_("%s: invalid start address for initialized registers of" 3146 " length %ld: 0x%lx%08lx\n"), 3147 bfd_get_filename (abfd), 3148 (long) sec->size, 3149 (unsigned long) (sec->vma >> 32), (unsigned long) (sec->vma)); 3150 3151 return FALSE; 3152 } 3153 3154 if (! mmo_internal_write_post (abfd, z, sec)) 3155 return FALSE; 3156 } 3157 else 3158 if (! mmo_internal_write_post (abfd, 255, NULL)) 3159 return FALSE; 3160 3161 return mmo_write_symbols_and_terminator (abfd); 3162} 3163 3164/* Return the size of a NULL pointer, so we support linking in an mmo 3165 object. */ 3166 3167static long 3168mmo_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, 3169 asection *sec ATTRIBUTE_UNUSED) 3170{ 3171 return sizeof (void *); 3172} 3173 3174/* Similarly canonicalize relocs to empty, filling in the terminating NULL 3175 pointer. */ 3176 3177long 3178mmo_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED, 3179 sec_ptr section ATTRIBUTE_UNUSED, arelent **relptr, 3180 asymbol **symbols ATTRIBUTE_UNUSED) 3181{ 3182 *relptr = NULL; 3183 return 0; 3184} 3185 3186/* If there's anything in particular in a mmo bfd that we want to free, 3187 make this a real function. Only do this if you see major memory 3188 thrashing; zealous free:ing will cause unwanted behavior, especially if 3189 you "free" memory allocated with "bfd_alloc", or even "bfd_release" a 3190 block allocated with "bfd_alloc"; they're really allocated from an 3191 obstack, and we don't know what was allocated there since this 3192 particular allocation. */ 3193 3194#define mmo_close_and_cleanup _bfd_generic_close_and_cleanup 3195#define mmo_bfd_free_cached_info _bfd_generic_bfd_free_cached_info 3196 3197/* Perhaps we need to adjust this one; mmo labels (originally) without a 3198 leading ':' might more appropriately be called local. */ 3199#define mmo_bfd_is_local_label_name bfd_generic_is_local_label_name 3200#define mmo_bfd_is_target_special_symbol \ 3201 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 3202 3203/* Is this one really used or defined by anyone? */ 3204#define mmo_get_lineno _bfd_nosymbols_get_lineno 3205 3206/* FIXME: We can do better on this one, if we have a dwarf2 .debug_line 3207 section or if MMO line numbers are implemented. */ 3208#define mmo_find_nearest_line _bfd_nosymbols_find_nearest_line 3209#define mmo_find_inliner_info _bfd_nosymbols_find_inliner_info 3210#define mmo_make_empty_symbol _bfd_generic_make_empty_symbol 3211#define mmo_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 3212#define mmo_read_minisymbols _bfd_generic_read_minisymbols 3213#define mmo_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 3214 3215#define mmo_get_section_contents_in_window \ 3216 _bfd_generic_get_section_contents_in_window 3217#define mmo_bfd_get_relocated_section_contents \ 3218 bfd_generic_get_relocated_section_contents 3219#define mmo_bfd_gc_sections bfd_generic_gc_sections 3220#define mmo_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 3221#define mmo_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 3222#define mmo_bfd_link_add_symbols _bfd_generic_link_add_symbols 3223#define mmo_bfd_link_just_syms _bfd_generic_link_just_syms 3224#define mmo_bfd_final_link _bfd_generic_final_link 3225#define mmo_bfd_link_split_section _bfd_generic_link_split_section 3226 3227/* Strictly speaking, only MMIX uses this restricted format, but let's not 3228 stop anybody from shooting themselves in the foot. */ 3229#define mmo_set_arch_mach bfd_default_set_arch_mach 3230#define mmo_bfd_relax_section bfd_generic_relax_section 3231#define mmo_bfd_merge_sections bfd_generic_merge_sections 3232#define mmo_bfd_is_group_section bfd_generic_is_group_section 3233#define mmo_bfd_discard_group bfd_generic_discard_group 3234#define mmo_section_already_linked \ 3235 _bfd_generic_section_already_linked 3236 3237/* objcopy will be upset if we return -1 from bfd_get_reloc_upper_bound by 3238 using BFD_JUMP_TABLE_RELOCS (_bfd_norelocs) rather than 0. FIXME: Most 3239 likely a bug in the _bfd_norelocs definition. 3240 3241 On the other hand, we smuggle in an mmo object (because setting up ELF 3242 is too cumbersome) when linking (from other formats, presumably ELF) to 3243 represent the g255 entry. We need to link that object, so need to say 3244 it has no relocs. Upper bound for the size of the relocation table is 3245 the size of a NULL pointer, and we support "canonicalization" for that 3246 pointer. */ 3247#define mmo_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 3248 3249/* We want to copy time of creation, otherwise we'd use 3250 BFD_JUMP_TABLE_COPY (_bfd_generic). */ 3251#define mmo_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data 3252#define mmo_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data 3253#define mmo_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data 3254#define mmo_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data 3255#define mmo_bfd_set_private_flags _bfd_generic_bfd_set_private_flags 3256#define mmo_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data 3257 3258const bfd_target bfd_mmo_vec = 3259{ 3260 "mmo", /* name */ 3261 bfd_target_mmo_flavour, 3262 BFD_ENDIAN_BIG, /* target byte order */ 3263 BFD_ENDIAN_BIG, /* target headers byte order */ 3264 3265 /* FIXME: Might need adjustments. */ 3266 (HAS_RELOC | EXEC_P | /* object flags */ 3267 HAS_LINENO | HAS_DEBUG | 3268 HAS_SYMS | HAS_LOCALS | WP_TEXT), 3269 3270 /* FIXME: Might need adjustments. */ 3271 (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD 3272 | SEC_READONLY | SEC_EXCLUDE | SEC_DEBUGGING | SEC_IN_MEMORY), 3273 /* section flags */ 3274 0, /* leading underscore */ 3275 ' ', /* ar_pad_char */ 3276 16, /* ar_max_namelen */ 3277 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3278 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3279 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ 3280 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 3281 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 3282 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ 3283 3284 { 3285 _bfd_dummy_target, 3286 mmo_object_p, /* bfd_check_format */ 3287 _bfd_dummy_target, 3288 _bfd_dummy_target, 3289 }, 3290 { 3291 bfd_false, 3292 mmo_mkobject, 3293 bfd_false, 3294 bfd_false, 3295 }, 3296 { /* bfd_write_contents */ 3297 bfd_false, 3298 mmo_write_object_contents, 3299 bfd_false, 3300 bfd_false, 3301 }, 3302 3303 BFD_JUMP_TABLE_GENERIC (mmo), 3304 BFD_JUMP_TABLE_COPY (mmo), 3305 BFD_JUMP_TABLE_CORE (_bfd_nocore), 3306 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 3307 BFD_JUMP_TABLE_SYMBOLS (mmo), 3308 /* We have to provide a valid method for getting relocs, returning zero, 3309 so we can't say BFD_JUMP_TABLE_RELOCS (_bfd_norelocs). */ 3310 BFD_JUMP_TABLE_RELOCS (mmo), 3311 BFD_JUMP_TABLE_WRITE (mmo), 3312 BFD_JUMP_TABLE_LINK (mmo), 3313 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 3314 3315 NULL, 3316 3317 NULL 3318}; 3319