bfd/srec.c

   1 /* BFD back-end for s-record objects.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5    Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
   6
   7 This file is part of BFD, the Binary File Descriptor library.
   8
   9 This program is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program; if not, write to the Free Software
  21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 /*
  24 SUBSECTION
  25         S-Record handling
  26
  27 DESCRIPTION
  28
  29         Ordinary S-Records cannot hold anything but addresses and
  30         data, so that's all that we implement.
  31
  32         The only interesting thing is that S-Records may come out of
  33         order and there is no header, so an initial scan is required
  34         to discover the minimum and maximum addresses used to create
  35         the vma and size of the only section we create.  We
  36         arbitrarily call this section ".text".
  37
  38         When bfd_get_section_contents is called the file is read
  39         again, and this time the data is placed into a bfd_alloc'd
  40         area.
  41
  42         Any number of sections may be created for output, we save them
  43         up and output them when it's time to close the bfd.
  44
  45         An s record looks like:
  46
  47 EXAMPLE
  48         S<type><length><address><data><checksum>
  49
  50 DESCRIPTION
  51         Where
  52         o length
  53         is the number of bytes following upto the checksum. Note that
  54         this is not the number of chars following, since it takes two
  55         chars to represent a byte.
  56         o type
  57         is one of:
  58         0) header record
  59         1) two byte address data record
  60         2) three byte address data record
  61         3) four byte address data record
  62         7) four byte address termination record
  63         8) three byte address termination record
  64         9) two byte address termination record
  65
  66         o address
  67         is the start address of the data following, or in the case of
  68         a termination record, the start address of the image
  69         o data
  70         is the data.
  71         o checksum
  72         is the sum of all the raw byte data in the record, from the length
  73         upwards, modulo 256 and subtracted from 255.
  74
  75 SUBSECTION
  76         Symbol S-Record handling
  77
  78 DESCRIPTION
  79         Some ICE equipment understands an addition to the standard
  80         S-Record format; symbols and their addresses can be sent
  81         before the data.
  82
  83         The format of this is:
  84         ($$ <modulename>
  85                 (<space> <symbol> <address>)*)
  86         $$
  87
  88         so a short symbol table could look like:
  89
  90 EXAMPLE
  91         $$ flash.x
  92         $$ flash.c
  93           _port6 $0
  94           _delay $4
  95           _start $14
  96           _etext $8036
  97           _edata $8036
  98           _end $8036
  99         $$
 100
 101 DESCRIPTION
 102         We allow symbols to be anywhere in the data stream - the module names
 103         are always ignored.
 104
 105 */
 106
 107 #include "bfd.h"
 108 #include "sysdep.h"
 109 #include "libbfd.h"
 110 #include "libiberty.h"
 111 #include "safe-ctype.h"
 112
 113 static void srec_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
 114 static void srec_print_symbol
 115  PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
 116 static void srec_init PARAMS ((void));
 117 static bfd_boolean srec_mkobject PARAMS ((bfd *));
 118 static int srec_get_byte PARAMS ((bfd *, bfd_boolean *));
 119 static void srec_bad_byte PARAMS ((bfd *, unsigned int, int, bfd_boolean));
 120 static bfd_boolean srec_scan PARAMS ((bfd *));
 121 static const bfd_target *srec_object_p PARAMS ((bfd *));
 122 static const bfd_target *symbolsrec_object_p PARAMS ((bfd *));
 123 static bfd_boolean srec_read_section PARAMS ((bfd *, asection *, bfd_byte *));
 124
 125 static bfd_boolean srec_write_record
 126   PARAMS ((bfd *, unsigned int, bfd_vma, const bfd_byte *, const bfd_byte *));
 127 static bfd_boolean srec_write_header PARAMS ((bfd *));
 128 static bfd_boolean srec_write_symbols PARAMS ((bfd *));
 129 static bfd_boolean srec_new_symbol PARAMS ((bfd *, const char *, bfd_vma));
 130 static bfd_boolean srec_get_section_contents
 131   PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
 132 static bfd_boolean srec_set_arch_mach
 133   PARAMS ((bfd *, enum bfd_architecture, unsigned long));
 134 static bfd_boolean srec_set_section_contents
 135   PARAMS ((bfd *, sec_ptr, const PTR, file_ptr, bfd_size_type));
 136 static bfd_boolean internal_srec_write_object_contents PARAMS ((bfd *, int));
 137 static bfd_boolean srec_write_object_contents PARAMS ((bfd *));
 138 static bfd_boolean symbolsrec_write_object_contents PARAMS ((bfd *));
 139 static int srec_sizeof_headers PARAMS ((bfd *, bfd_boolean));
 140 static long srec_get_symtab_upper_bound PARAMS ((bfd *));
 141 static long srec_canonicalize_symtab PARAMS ((bfd *, asymbol **));
 142
 143 /* Macros for converting between hex and binary.  */
 144
 145 static const char digs[] = "0123456789ABCDEF";
 146
 147 #define NIBBLE(x) hex_value(x)
 148 #define HEX(buffer) ((NIBBLE((buffer)[0])<<4) + NIBBLE((buffer)[1]))
 149 #define TOHEX(d, x, ch) \
 150         d[1] = digs[(x) & 0xf]; \
 151         d[0] = digs[((x)>>4)&0xf]; \
 152         ch += ((x) & 0xff);
 153 #define ISHEX(x)  hex_p(x)
 154
 155 /* Initialize by filling in the hex conversion array.  */
 156
 157 static void
 158 srec_init ()
 159 {
 160   static bfd_boolean inited = FALSE;
 161
 162   if (! inited)
 163     {
 164       inited = TRUE;
 165       hex_init ();
 166     }
 167 }
 168
 169 /* The maximum number of address+data+crc bytes on a line is FF.  */
 170 #define MAXCHUNK 0xff
 171
 172 /* Default size for a CHUNK.  */
 173 #define DEFAULT_CHUNK 16
 174
 175 /* The number of data bytes we actually fit onto a line on output.
 176    This variable can be modified by objcopy's --srec-len parameter.
 177    For a 0x75 byte record you should set --srec-len=0x70.  */
 178 unsigned int Chunk = DEFAULT_CHUNK;
 179
 180 /* The type of srec output (free or forced to S3).
 181    This variable can be modified by objcopy's --srec-forceS3
 182    parameter.  */
 183 bfd_boolean S3Forced = FALSE;
 184
 185 /* When writing an S-record file, the S-records can not be output as
 186    they are seen.  This structure is used to hold them in memory.  */
 187
 188 struct srec_data_list_struct
 189 {
 190   struct srec_data_list_struct *next;
 191   bfd_byte *data;
 192   bfd_vma where;
 193   bfd_size_type size;
 194 };
 195
 196 typedef struct srec_data_list_struct srec_data_list_type;
 197
 198 /* When scanning the S-record file, a linked list of srec_symbol
 199    structures is built to represent the symbol table (if there is
 200    one).  */
 201
 202 struct srec_symbol
 203 {
 204   struct srec_symbol *next;
 205   const char *name;
 206   bfd_vma val;
 207 };
 208
 209 /* The S-record tdata information.  */
 210
 211 typedef struct srec_data_struct
 212   {
 213     srec_data_list_type *head;
 214     srec_data_list_type *tail;
 215     unsigned int type;
 216     struct srec_symbol *symbols;
 217     struct srec_symbol *symtail;
 218     asymbol *csymbols;
 219   }
 220 tdata_type;
 221
 222 static bfd_boolean srec_write_section
 223   PARAMS ((bfd *, tdata_type *, srec_data_list_type *));
 224 static bfd_boolean srec_write_terminator
 225   PARAMS ((bfd *, tdata_type *));
 226
 227 /* Set up the S-record tdata information.  */
 228
 229 static bfd_boolean
 230 srec_mkobject (abfd)
 231      bfd *abfd;
 232 {
 233   bfd_size_type amt;
 234   tdata_type *tdata;
 235
 236   srec_init ();
 237
 238   amt = sizeof (tdata_type);
 239   tdata = (tdata_type *) bfd_alloc (abfd, amt);
 240   if (tdata == NULL)
 241     return FALSE;
 242
 243   abfd->tdata.srec_data = tdata;
 244   tdata->type = 1;
 245   tdata->head = NULL;
 246   tdata->tail = NULL;
 247   tdata->symbols = NULL;
 248   tdata->symtail = NULL;
 249   tdata->csymbols = NULL;
 250
 251   return TRUE;
 252 }
 253
 254 /* Read a byte from an S record file.  Set *ERRORPTR if an error
 255    occurred.  Return EOF on error or end of file.  */
 256
 257 static int
 258 srec_get_byte (abfd, errorptr)
 259      bfd *abfd;
 260      bfd_boolean *errorptr;
 261 {
 262   bfd_byte c;
 263
 264   if (bfd_bread (&c, (bfd_size_type) 1, abfd) != 1)
 265     {
 266       if (bfd_get_error () != bfd_error_file_truncated)
 267         *errorptr = TRUE;
 268       return EOF;
 269     }
 270
 271   return (int) (c & 0xff);
 272 }
 273
 274 /* Report a problem in an S record file.  FIXME: This probably should
 275    not call fprintf, but we really do need some mechanism for printing
 276    error messages.  */
 277
 278 static void
 279 srec_bad_byte (abfd, lineno, c, error)
 280      bfd *abfd;
 281      unsigned int lineno;
 282      int c;
 283      bfd_boolean error;
 284 {
 285   if (c == EOF)
 286     {
 287       if (! error)
 288         bfd_set_error (bfd_error_file_truncated);
 289     }
 290   else
 291     {
 292       char buf[10];
 293
 294       if (! ISPRINT (c))
 295         sprintf (buf, "\\%03o", (unsigned int) c);
 296       else
 297         {
 298           buf[0] = c;
 299           buf[1] = '\0';
 300         }
 301       (*_bfd_error_handler)
 302         (_("%B:%d: Unexpected character `%s' in S-record file\n"),
 303          abfd, lineno, buf);
 304       bfd_set_error (bfd_error_bad_value);
 305     }
 306 }
 307
 308 /* Add a new symbol found in an S-record file.  */
 309
 310 static bfd_boolean
 311 srec_new_symbol (abfd, name, val)
 312      bfd *abfd;
 313      const char *name;
 314      bfd_vma val;
 315 {
 316   struct srec_symbol *n;
 317   bfd_size_type amt = sizeof (struct srec_symbol);
 318
 319   n = (struct srec_symbol *) bfd_alloc (abfd, amt);
 320   if (n == NULL)
 321     return FALSE;
 322
 323   n->name = name;
 324   n->val = val;
 325
 326   if (abfd->tdata.srec_data->symbols == NULL)
 327     abfd->tdata.srec_data->symbols = n;
 328   else
 329     abfd->tdata.srec_data->symtail->next = n;
 330   abfd->tdata.srec_data->symtail = n;
 331   n->next = NULL;
 332
 333   ++abfd->symcount;
 334
 335   return TRUE;
 336 }
 337
 338 /* Read the S record file and turn it into sections.  We create a new
 339    section for each contiguous set of bytes.  */
 340
 341 static bfd_boolean
 342 srec_scan (abfd)
 343      bfd *abfd;
 344 {
 345   int c;
 346   unsigned int lineno = 1;
 347   bfd_boolean error = FALSE;
 348   bfd_byte *buf = NULL;
 349   size_t bufsize = 0;
 350   asection *sec = NULL;
 351   char *symbuf = NULL;
 352
 353   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
 354     goto error_return;
 355
 356   while ((c = srec_get_byte (abfd, &error)) != EOF)
 357     {
 358       /* We only build sections from contiguous S-records, so if this
 359          is not an S-record, then stop building a section.  */
 360       if (c != 'S' && c != '\r' && c != '\n')
 361         sec = NULL;
 362
 363       switch (c)
 364         {
 365         default:
 366           srec_bad_byte (abfd, lineno, c, error);
 367           goto error_return;
 368
 369         case '\n':
 370           ++lineno;
 371           break;
 372
 373         case '\r':
 374           break;
 375
 376         case '$':
 377           /* Starting a module name, which we ignore.  */
 378           while ((c = srec_get_byte (abfd, &error)) != '\n'
 379                  && c != EOF)
 380             ;
 381           if (c == EOF)
 382             {
 383               srec_bad_byte (abfd, lineno, c, error);
 384               goto error_return;
 385             }
 386
 387           ++lineno;
 388
 389           break;
 390
 391         case ' ':
 392           do
 393             {
 394               bfd_size_type alc;
 395               char *p, *symname;
 396               bfd_vma symval;
 397
 398               /* Starting a symbol definition.  */
 399               while ((c = srec_get_byte (abfd, &error)) != EOF
 400                      && (c == ' ' || c == '\t'))
 401                 ;
 402
 403               if (c == '\n' || c == '\r')
 404                 break;
 405
 406               if (c == EOF)
 407                 {
 408                   srec_bad_byte (abfd, lineno, c, error);
 409                   goto error_return;
 410                 }
 411
 412               alc = 10;
 413               symbuf = (char *) bfd_malloc (alc + 1);
 414               if (symbuf == NULL)
 415                 goto error_return;
 416
 417               p = symbuf;
 418
 419               *p++ = c;
 420               while ((c = srec_get_byte (abfd, &error)) != EOF
 421                      && ! ISSPACE (c))
 422                 {
 423                   if ((bfd_size_type) (p - symbuf) >= alc)
 424                     {
 425                       char *n;
 426
 427                       alc *= 2;
 428                       n = (char *) bfd_realloc (symbuf, alc + 1);
 429                       if (n == NULL)
 430                         goto error_return;
 431                       p = n + (p - symbuf);
 432                       symbuf = n;
 433                     }
 434
 435                   *p++ = c;
 436                 }
 437
 438               if (c == EOF)
 439                 {
 440                   srec_bad_byte (abfd, lineno, c, error);
 441                   goto error_return;
 442                 }
 443
 444               *p++ = '\0';
 445               symname = bfd_alloc (abfd, (bfd_size_type) (p - symbuf));
 446               if (symname == NULL)
 447                 goto error_return;
 448               strcpy (symname, symbuf);
 449               free (symbuf);
 450               symbuf = NULL;
 451
 452               while ((c = srec_get_byte (abfd, &error)) != EOF
 453                      && (c == ' ' || c == '\t'))
 454                 ;
 455               if (c == EOF)
 456                 {
 457                   srec_bad_byte (abfd, lineno, c, error);
 458                   goto error_return;
 459                 }
 460
 461               /* Skip a dollar sign before the hex value.  */
 462               if (c == '$')
 463                 {
 464                   c = srec_get_byte (abfd, &error);
 465                   if (c == EOF)
 466                     {
 467                       srec_bad_byte (abfd, lineno, c, error);
 468                       goto error_return;
 469                     }
 470                 }
 471
 472               symval = 0;
 473               while (ISHEX (c))
 474                 {
 475                   symval <<= 4;
 476                   symval += NIBBLE (c);
 477                   c = srec_get_byte (abfd, &error);
 478                 }
 479
 480               if (! srec_new_symbol (abfd, symname, symval))
 481                 goto error_return;
 482             }
 483           while (c == ' ' || c == '\t')
 484             ;
 485
 486           if (c == '\n')
 487             ++lineno;
 488           else if (c != '\r')
 489             {
 490               srec_bad_byte (abfd, lineno, c, error);
 491               goto error_return;
 492             }
 493
 494           break;
 495
 496         case 'S':
 497           {
 498             file_ptr pos;
 499             char hdr[3];
 500             unsigned int bytes;
 501             bfd_vma address;
 502             bfd_byte *data;
 503
 504             /* Starting an S-record.  */
 505
 506             pos = bfd_tell (abfd) - 1;
 507
 508             if (bfd_bread (hdr, (bfd_size_type) 3, abfd) != 3)
 509               goto error_return;
 510
 511             if (! ISHEX (hdr[1]) || ! ISHEX (hdr[2]))
 512               {
 513                 if (! ISHEX (hdr[1]))
 514                   c = hdr[1];
 515                 else
 516                   c = hdr[2];
 517                 srec_bad_byte (abfd, lineno, c, error);
 518                 goto error_return;
 519               }
 520
 521             bytes = HEX (hdr + 1);
 522             if (bytes * 2 > bufsize)
 523               {
 524                 if (buf != NULL)
 525                   free (buf);
 526                 buf = (bfd_byte *) bfd_malloc ((bfd_size_type) bytes * 2);
 527                 if (buf == NULL)
 528                   goto error_return;
 529                 bufsize = bytes * 2;
 530               }
 531
 532             if (bfd_bread (buf, (bfd_size_type) bytes * 2, abfd) != bytes * 2)
 533               goto error_return;
 534
 535             /* Ignore the checksum byte.  */
 536             --bytes;
 537
 538             address = 0;
 539             data = buf;
 540             switch (hdr[0])
 541               {
 542               case '0':
 543               case '5':
 544                 /* Prologue--ignore the file name, but stop building a
 545                    section at this point.  */
 546                 sec = NULL;
 547                 break;
 548
 549               case '3':
 550                 address = HEX (data);
 551                 data += 2;
 552                 --bytes;
 553                 /* Fall through.  */
 554               case '2':
 555                 address = (address << 8) | HEX (data);
 556                 data += 2;
 557                 --bytes;
 558                 /* Fall through.  */
 559               case '1':
 560                 address = (address << 8) | HEX (data);
 561                 data += 2;
 562                 address = (address << 8) | HEX (data);
 563                 data += 2;
 564                 bytes -= 2;
 565
 566                 if (sec != NULL
 567                     && sec->vma + sec->size == address)
 568                   {
 569                     /* This data goes at the end of the section we are
 570                        currently building.  */
 571                     sec->size += bytes;
 572                   }
 573                 else
 574                   {
 575                     char secbuf[20];
 576                     char *secname;
 577                     bfd_size_type amt;
 578
 579                     sprintf (secbuf, ".sec%d", bfd_count_sections (abfd) + 1);
 580                     amt = strlen (secbuf) + 1;
 581                     secname = (char *) bfd_alloc (abfd, amt);
 582                     strcpy (secname, secbuf);
 583                     sec = bfd_make_section (abfd, secname);
 584                     if (sec == NULL)
 585                       goto error_return;
 586                     sec->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 587                     sec->vma = address;
 588                     sec->lma = address;
 589                     sec->size = bytes;
 590                     sec->filepos = pos;
 591                   }
 592
 593                 break;
 594
 595               case '7':
 596                 address = HEX (data);
 597                 data += 2;
 598                 /* Fall through.  */
 599               case '8':
 600                 address = (address << 8) | HEX (data);
 601                 data += 2;
 602                 /* Fall through.  */
 603               case '9':
 604                 address = (address << 8) | HEX (data);
 605                 data += 2;
 606                 address = (address << 8) | HEX (data);
 607                 data += 2;
 608
 609                 /* This is a termination record.  */
 610                 abfd->start_address = address;
 611
 612                 if (buf != NULL)
 613                   free (buf);
 614
 615                 return TRUE;
 616               }
 617           }
 618           break;
 619         }
 620     }
 621
 622   if (error)
 623     goto error_return;
 624
 625   if (buf != NULL)
 626     free (buf);
 627
 628   return TRUE;
 629
 630  error_return:
 631   if (symbuf != NULL)
 632     free (symbuf);
 633   if (buf != NULL)
 634     free (buf);
 635   return FALSE;
 636 }
 637
 638 /* Check whether an existing file is an S-record file.  */
 639
 640 static const bfd_target *
 641 srec_object_p (abfd)
 642      bfd *abfd;
 643 {
 644   PTR tdata_save;
 645   bfd_byte b[4];
 646
 647   srec_init ();
 648
 649   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
 650       || bfd_bread (b, (bfd_size_type) 4, abfd) != 4)
 651     return NULL;
 652
 653   if (b[0] != 'S' || !ISHEX (b[1]) || !ISHEX (b[2]) || !ISHEX (b[3]))
 654     {
 655       bfd_set_error (bfd_error_wrong_format);
 656       return NULL;
 657     }
 658
 659   tdata_save = abfd->tdata.any;
 660   if (! srec_mkobject (abfd) || ! srec_scan (abfd))
 661     {
 662       if (abfd->tdata.any != tdata_save && abfd->tdata.any != NULL)
 663         bfd_release (abfd, abfd->tdata.any);
 664       abfd->tdata.any = tdata_save;
 665       return NULL;
 666     }
 667
 668   if (abfd->symcount > 0)
 669     abfd->flags |= HAS_SYMS;
 670
 671   return abfd->xvec;
 672 }
 673
 674 /* Check whether an existing file is an S-record file with symbols.  */
 675
 676 static const bfd_target *
 677 symbolsrec_object_p (abfd)
 678      bfd *abfd;
 679 {
 680   PTR tdata_save;
 681   char b[2];
 682
 683   srec_init ();
 684
 685   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
 686       || bfd_bread (b, (bfd_size_type) 2, abfd) != 2)
 687     return NULL;
 688
 689   if (b[0] != '$' || b[1] != '$')
 690     {
 691       bfd_set_error (bfd_error_wrong_format);
 692       return NULL;
 693     }
 694
 695   tdata_save = abfd->tdata.any;
 696   if (! srec_mkobject (abfd) || ! srec_scan (abfd))
 697     {
 698       if (abfd->tdata.any != tdata_save && abfd->tdata.any != NULL)
 699         bfd_release (abfd, abfd->tdata.any);
 700       abfd->tdata.any = tdata_save;
 701       return NULL;
 702     }
 703
 704   if (abfd->symcount > 0)
 705     abfd->flags |= HAS_SYMS;
 706
 707   return abfd->xvec;
 708 }
 709
 710 /* Read in the contents of a section in an S-record file.  */
 711
 712 static bfd_boolean
 713 srec_read_section (abfd, section, contents)
 714      bfd *abfd;
 715      asection *section;
 716      bfd_byte *contents;
 717 {
 718   int c;
 719   bfd_size_type sofar = 0;
 720   bfd_boolean error = FALSE;
 721   bfd_byte *buf = NULL;
 722   size_t bufsize = 0;
 723
 724   if (bfd_seek (abfd, section->filepos, SEEK_SET) != 0)
 725     goto error_return;
 726
 727   while ((c = srec_get_byte (abfd, &error)) != EOF)
 728     {
 729       bfd_byte hdr[3];
 730       unsigned int bytes;
 731       bfd_vma address;
 732       bfd_byte *data;
 733
 734       if (c == '\r' || c == '\n')
 735         continue;
 736
 737       /* This is called after srec_scan has already been called, so we
 738          ought to know the exact format.  */
 739       BFD_ASSERT (c == 'S');
 740
 741       if (bfd_bread (hdr, (bfd_size_type) 3, abfd) != 3)
 742         goto error_return;
 743
 744       BFD_ASSERT (ISHEX (hdr[1]) && ISHEX (hdr[2]));
 745
 746       bytes = HEX (hdr + 1);
 747
 748       if (bytes * 2 > bufsize)
 749         {
 750           if (buf != NULL)
 751             free (buf);
 752           buf = (bfd_byte *) bfd_malloc ((bfd_size_type) bytes * 2);
 753           if (buf == NULL)
 754             goto error_return;
 755           bufsize = bytes * 2;
 756         }
 757
 758       if (bfd_bread (buf, (bfd_size_type) bytes * 2, abfd) != bytes * 2)
 759         goto error_return;
 760
 761       address = 0;
 762       data = buf;
 763       switch (hdr[0])
 764         {
 765         default:
 766           BFD_ASSERT (sofar == section->size);
 767           if (buf != NULL)
 768             free (buf);
 769           return TRUE;
 770
 771         case '3':
 772           address = HEX (data);
 773           data += 2;
 774           --bytes;
 775           /* Fall through.  */
 776         case '2':
 777           address = (address << 8) | HEX (data);
 778           data += 2;
 779           --bytes;
 780           /* Fall through.  */
 781         case '1':
 782           address = (address << 8) | HEX (data);
 783           data += 2;
 784           address = (address << 8) | HEX (data);
 785           data += 2;
 786           bytes -= 2;
 787
 788           if (address != section->vma + sofar)
 789             {
 790               /* We've come to the end of this section.  */
 791               BFD_ASSERT (sofar == section->size);
 792               if (buf != NULL)
 793                 free (buf);
 794               return TRUE;
 795             }
 796
 797           /* Don't consider checksum.  */
 798           --bytes;
 799
 800           while (bytes-- != 0)
 801             {
 802               contents[sofar] = HEX (data);
 803               data += 2;
 804               ++sofar;
 805             }
 806
 807           break;
 808         }
 809     }
 810
 811   if (error)
 812     goto error_return;
 813
 814   BFD_ASSERT (sofar == section->size);
 815
 816   if (buf != NULL)
 817     free (buf);
 818
 819   return TRUE;
 820
 821  error_return:
 822   if (buf != NULL)
 823     free (buf);
 824   return FALSE;
 825 }
 826
 827 /* Get the contents of a section in an S-record file.  */
 828
 829 static bfd_boolean
 830 srec_get_section_contents (abfd, section, location, offset, count)
 831      bfd *abfd;
 832      asection *section;
 833      PTR location;
 834      file_ptr offset;
 835      bfd_size_type count;
 836 {
 837   if (section->used_by_bfd == NULL)
 838     {
 839       section->used_by_bfd = bfd_alloc (abfd, section->size);
 840       if (section->used_by_bfd == NULL && section->size != 0)
 841         return FALSE;
 842
 843       if (! srec_read_section (abfd, section, section->used_by_bfd))
 844         return FALSE;
 845     }
 846
 847   memcpy (location, (bfd_byte *) section->used_by_bfd + offset,
 848           (size_t) count);
 849
 850   return TRUE;
 851 }
 852
 853 /* Set the architecture.  We accept an unknown architecture here.  */
 854
 855 static bfd_boolean
 856 srec_set_arch_mach (abfd, arch, mach)
 857      bfd *abfd;
 858      enum bfd_architecture arch;
 859      unsigned long mach;
 860 {
 861   if (arch == bfd_arch_unknown)
 862     {
 863       abfd->arch_info = &bfd_default_arch_struct;
 864       return TRUE;
 865     }
 866   return bfd_default_set_arch_mach (abfd, arch, mach);
 867 }
 868
 869 /* We have to save up all the Srecords for a splurge before output.  */
 870
 871 static bfd_boolean
 872 srec_set_section_contents (abfd, section, location, offset, bytes_to_do)
 873      bfd *abfd;
 874      sec_ptr section;
 875      const PTR location;
 876      file_ptr offset;
 877      bfd_size_type bytes_to_do;
 878 {
 879   tdata_type *tdata = abfd->tdata.srec_data;
 880   register srec_data_list_type *entry;
 881
 882   entry = ((srec_data_list_type *)
 883            bfd_alloc (abfd, (bfd_size_type) sizeof (srec_data_list_type)));
 884   if (entry == NULL)
 885     return FALSE;
 886
 887   if (bytes_to_do
 888       && (section->flags & SEC_ALLOC)
 889       && (section->flags & SEC_LOAD))
 890     {
 891       bfd_byte *data;
 892
 893       data = (bfd_byte *) bfd_alloc (abfd, bytes_to_do);
 894       if (data == NULL)
 895         return FALSE;
 896       memcpy ((PTR) data, location, (size_t) bytes_to_do);
 897
 898       /* Ff S3Forced is TRUE then always select S3 records,
 899          regardless of the siez of the addresses.  */
 900       if (S3Forced)
 901         tdata->type = 3;
 902       else if ((section->lma + offset + bytes_to_do - 1) <= 0xffff)
 903         ;  /* The default, S1, is OK.  */
 904       else if ((section->lma + offset + bytes_to_do - 1) <= 0xffffff
 905                && tdata->type <= 2)
 906         tdata->type = 2;
 907       else
 908         tdata->type = 3;
 909
 910       entry->data = data;
 911       entry->where = section->lma + offset;
 912       entry->size = bytes_to_do;
 913
 914       /* Sort the records by address.  Optimize for the common case of
 915          adding a record to the end of the list.  */
 916       if (tdata->tail != NULL
 917           && entry->where >= tdata->tail->where)
 918         {
 919           tdata->tail->next = entry;
 920           entry->next = NULL;
 921           tdata->tail = entry;
 922         }
 923       else
 924         {
 925           register srec_data_list_type **look;
 926
 927           for (look = &tdata->head;
 928                *look != NULL && (*look)->where < entry->where;
 929                look = &(*look)->next)
 930             ;
 931           entry->next = *look;
 932           *look = entry;
 933           if (entry->next == NULL)
 934             tdata->tail = entry;
 935         }
 936     }
 937   return TRUE;
 938 }
 939
 940 /* Write a record of type, of the supplied number of bytes. The
 941    supplied bytes and length don't have a checksum. That's worked out
 942    here.  */
 943
 944 static bfd_boolean
 945 srec_write_record (abfd, type, address, data, end)
 946      bfd *abfd;
 947      unsigned int type;
 948      bfd_vma address;
 949      const bfd_byte *data;
 950      const bfd_byte *end;
 951 {
 952   char buffer[2 * MAXCHUNK + 6];
 953   unsigned int check_sum = 0;
 954   const bfd_byte *src = data;
 955   char *dst = buffer;
 956   char *length;
 957   bfd_size_type wrlen;
 958
 959   *dst++ = 'S';
 960   *dst++ = '0' + type;
 961
 962   length = dst;
 963   dst += 2;                     /* Leave room for dst.  */
 964
 965   switch (type)
 966     {
 967     case 3:
 968     case 7:
 969       TOHEX (dst, (address >> 24), check_sum);
 970       dst += 2;
 971     case 8:
 972     case 2:
 973       TOHEX (dst, (address >> 16), check_sum);
 974       dst += 2;
 975     case 9:
 976     case 1:
 977     case 0:
 978       TOHEX (dst, (address >> 8), check_sum);
 979       dst += 2;
 980       TOHEX (dst, (address), check_sum);
 981       dst += 2;
 982       break;
 983
 984     }
 985   for (src = data; src < end; src++)
 986     {
 987       TOHEX (dst, *src, check_sum);
 988       dst += 2;
 989     }
 990
 991   /* Fill in the length.  */
 992   TOHEX (length, (dst - length) / 2, check_sum);
 993   check_sum &= 0xff;
 994   check_sum = 255 - check_sum;
 995   TOHEX (dst, check_sum, check_sum);
 996   dst += 2;
 997
 998   *dst++ = '\r';
 999   *dst++ = '\n';
1000   wrlen = dst - buffer;
1001   if (bfd_bwrite ((PTR) buffer, wrlen, abfd) != wrlen)
1002     return FALSE;
1003   return TRUE;
1004 }
1005
1006 static bfd_boolean
1007 srec_write_header (abfd)
1008      bfd *abfd;
1009 {
1010   unsigned int len = strlen (abfd->filename);
1011
1012   /* I'll put an arbitrary 40 char limit on header size.  */
1013   if (len > 40)
1014     len = 40;
1015
1016   return srec_write_record (abfd, 0, (bfd_vma) 0,
1017                             abfd->filename, abfd->filename + len);
1018 }
1019
1020 static bfd_boolean
1021 srec_write_section (abfd, tdata, list)
1022      bfd *abfd;
1023      tdata_type *tdata;
1024      srec_data_list_type *list;
1025 {
1026   unsigned int octets_written = 0;
1027   bfd_byte *location = list->data;
1028
1029   /* Validate number of data bytes to write.  The srec length byte
1030      counts the address, data and crc bytes.  S1 (tdata->type == 1)
1031      records have two address bytes, S2 (tdata->type == 2) records
1032      have three, and S3 (tdata->type == 3) records have four.
1033      The total length can't exceed 255, and a zero data length will
1034      spin for a long time.  */
1035   if (Chunk == 0)
1036     Chunk = 1;
1037   else if (Chunk > MAXCHUNK - tdata->type - 2)
1038     Chunk = MAXCHUNK - tdata->type - 2;
1039
1040   while (octets_written < list->size)
1041     {
1042       bfd_vma address;
1043       unsigned int octets_this_chunk = list->size - octets_written;
1044
1045       if (octets_this_chunk > Chunk)
1046         octets_this_chunk = Chunk;
1047
1048       address = list->where + octets_written / bfd_octets_per_byte (abfd);
1049
1050       if (! srec_write_record (abfd,
1051                                tdata->type,
1052                                address,
1053                                location,
1054                                location + octets_this_chunk))
1055         return FALSE;
1056
1057       octets_written += octets_this_chunk;
1058       location += octets_this_chunk;
1059     }
1060
1061   return TRUE;
1062 }
1063
1064 static bfd_boolean
1065 srec_write_terminator (abfd, tdata)
1066      bfd *abfd;
1067      tdata_type *tdata;
1068 {
1069   return srec_write_record (abfd, 10 - tdata->type,
1070                             abfd->start_address, NULL, NULL);
1071 }
1072
1073 static bfd_boolean
1074 srec_write_symbols (abfd)
1075      bfd *abfd;
1076 {
1077   /* Dump out the symbols of a bfd.  */
1078   int i;
1079   int count = bfd_get_symcount (abfd);
1080
1081   if (count)
1082     {
1083       bfd_size_type len;
1084       asymbol **table = bfd_get_outsymbols (abfd);
1085       len = strlen (abfd->filename);
1086       if (bfd_bwrite ("$$ ", (bfd_size_type) 3, abfd) != 3
1087           || bfd_bwrite (abfd->filename, len, abfd) != len
1088           || bfd_bwrite ("\r\n", (bfd_size_type) 2, abfd) != 2)
1089         return FALSE;
1090
1091       for (i = 0; i < count; i++)
1092         {
1093           asymbol *s = table[i];
1094           if (! bfd_is_local_label (abfd, s)
1095               && (s->flags & BSF_DEBUGGING) == 0)
1096             {
1097               /* Just dump out non debug symbols.  */
1098               char buf[43], *p;
1099
1100               len = strlen (s->name);
1101               if (bfd_bwrite ("  ", (bfd_size_type) 2, abfd) != 2
1102                   || bfd_bwrite (s->name, len, abfd) != len)
1103                 return FALSE;
1104
1105               sprintf_vma (buf + 2, (s->value
1106                                      + s->section->output_section->lma
1107                                      + s->section->output_offset));
1108               p = buf + 2;
1109               while (p[0] == '0' && p[1] != 0)
1110                 p++;
1111               len = strlen (p);
1112               p[len] = '\r';
1113               p[len + 1] = '\n';
1114               *--p = '$';
1115               *--p = ' ';
1116               len += 4;
1117               if (bfd_bwrite (p, len, abfd) != len)
1118                 return FALSE;
1119             }
1120         }
1121       if (bfd_bwrite ("$$ \r\n", (bfd_size_type) 5, abfd) != 5)
1122         return FALSE;
1123     }
1124
1125   return TRUE;
1126 }
1127
1128 static bfd_boolean
1129 internal_srec_write_object_contents (abfd, symbols)
1130      bfd *abfd;
1131      int symbols;
1132 {
1133   tdata_type *tdata = abfd->tdata.srec_data;
1134   srec_data_list_type *list;
1135
1136   if (symbols)
1137     {
1138       if (! srec_write_symbols (abfd))
1139         return FALSE;
1140     }
1141
1142   if (! srec_write_header (abfd))
1143     return FALSE;
1144
1145   /* Now wander though all the sections provided and output them.  */
1146   list = tdata->head;
1147
1148   while (list != (srec_data_list_type *) NULL)
1149     {
1150       if (! srec_write_section (abfd, tdata, list))
1151         return FALSE;
1152       list = list->next;
1153     }
1154   return srec_write_terminator (abfd, tdata);
1155 }
1156
1157 static bfd_boolean
1158 srec_write_object_contents (abfd)
1159      bfd *abfd;
1160 {
1161   return internal_srec_write_object_contents (abfd, 0);
1162 }
1163
1164 static bfd_boolean
1165 symbolsrec_write_object_contents (abfd)
1166      bfd *abfd;
1167 {
1168   return internal_srec_write_object_contents (abfd, 1);
1169 }
1170
1171 static int
1172 srec_sizeof_headers (abfd, exec)
1173      bfd *abfd ATTRIBUTE_UNUSED;
1174      bfd_boolean exec ATTRIBUTE_UNUSED;
1175 {
1176   return 0;
1177 }
1178
1179 /* Return the amount of memory needed to read the symbol table.  */
1180
1181 static long
1182 srec_get_symtab_upper_bound (abfd)
1183      bfd *abfd;
1184 {
1185   return (bfd_get_symcount (abfd) + 1) * sizeof (asymbol *);
1186 }
1187
1188 /* Return the symbol table.  */
1189
1190 static long
1191 srec_canonicalize_symtab (abfd, alocation)
1192      bfd *abfd;
1193      asymbol **alocation;
1194 {
1195   bfd_size_type symcount = bfd_get_symcount (abfd);
1196   asymbol *csymbols;
1197   unsigned int i;
1198
1199   csymbols = abfd->tdata.srec_data->csymbols;
1200   if (csymbols == NULL)
1201     {
1202       asymbol *c;
1203       struct srec_symbol *s;
1204
1205       csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol));
1206       if (csymbols == NULL && symcount != 0)
1207         return 0;
1208       abfd->tdata.srec_data->csymbols = csymbols;
1209
1210       for (s = abfd->tdata.srec_data->symbols, c = csymbols;
1211            s != NULL;
1212            s = s->next, ++c)
1213         {
1214           c->the_bfd = abfd;
1215           c->name = s->name;
1216           c->value = s->val;
1217           c->flags = BSF_GLOBAL;
1218           c->section = bfd_abs_section_ptr;
1219           c->udata.p = NULL;
1220         }
1221     }
1222
1223   for (i = 0; i < symcount; i++)
1224     *alocation++ = csymbols++;
1225   *alocation = NULL;
1226
1227   return symcount;
1228 }
1229
1230 static void
1231 srec_get_symbol_info (ignore_abfd, symbol, ret)
1232      bfd *ignore_abfd ATTRIBUTE_UNUSED;
1233      asymbol *symbol;
1234      symbol_info *ret;
1235 {
1236   bfd_symbol_info (symbol, ret);
1237 }
1238
1239 static void
1240 srec_print_symbol (abfd, afile, symbol, how)
1241      bfd *abfd;
1242      PTR afile;
1243      asymbol *symbol;
1244      bfd_print_symbol_type how;
1245 {
1246   FILE *file = (FILE *) afile;
1247   switch (how)
1248     {
1249     case bfd_print_symbol_name:
1250       fprintf (file, "%s", symbol->name);
1251       break;
1252     default:
1253       bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
1254       fprintf (file, " %-5s %s",
1255                symbol->section->name,
1256                symbol->name);
1257
1258     }
1259 }
1260
1261 #define srec_close_and_cleanup _bfd_generic_close_and_cleanup
1262 #define srec_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
1263 #define srec_new_section_hook _bfd_generic_new_section_hook
1264
1265 #define srec_bfd_is_local_label_name bfd_generic_is_local_label_name
1266 #define srec_get_lineno _bfd_nosymbols_get_lineno
1267 #define srec_find_nearest_line _bfd_nosymbols_find_nearest_line
1268 #define srec_make_empty_symbol _bfd_generic_make_empty_symbol
1269 #define srec_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
1270 #define srec_read_minisymbols _bfd_generic_read_minisymbols
1271 #define srec_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1272
1273 #define srec_get_reloc_upper_bound \
1274   ((long (*) PARAMS ((bfd *, asection *))) bfd_0l)
1275 #define srec_canonicalize_reloc \
1276   ((long (*) PARAMS ((bfd *, asection *, arelent **, asymbol **))) bfd_0l)
1277 #define srec_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
1278
1279 #define srec_get_section_contents_in_window \
1280   _bfd_generic_get_section_contents_in_window
1281
1282 #define srec_bfd_get_relocated_section_contents \
1283   bfd_generic_get_relocated_section_contents
1284 #define srec_bfd_relax_section bfd_generic_relax_section
1285 #define srec_bfd_gc_sections bfd_generic_gc_sections
1286 #define srec_bfd_merge_sections bfd_generic_merge_sections
1287 #define srec_bfd_is_group_section bfd_generic_is_group_section
1288 #define srec_bfd_discard_group bfd_generic_discard_group
1289 #define srec_section_already_linked \
1290   _bfd_generic_section_already_linked
1291 #define srec_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1292 #define srec_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
1293 #define srec_bfd_link_add_symbols _bfd_generic_link_add_symbols
1294 #define srec_bfd_link_just_syms _bfd_generic_link_just_syms
1295 #define srec_bfd_final_link _bfd_generic_final_link
1296 #define srec_bfd_link_split_section _bfd_generic_link_split_section
1297
1298 const bfd_target srec_vec =
1299 {
1300   "srec",                       /* name */
1301   bfd_target_srec_flavour,
1302   BFD_ENDIAN_UNKNOWN,           /* target byte order */
1303   BFD_ENDIAN_UNKNOWN,           /* target headers byte order */
1304   (HAS_RELOC | EXEC_P |         /* object flags */
1305    HAS_LINENO | HAS_DEBUG |
1306    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1307   (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
1308    | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1309   0,                            /* leading underscore */
1310   ' ',                          /* ar_pad_char */
1311   16,                           /* ar_max_namelen */
1312   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1313   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1314   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
1315   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1316   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1317   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* hdrs */
1318
1319   {
1320     _bfd_dummy_target,
1321     srec_object_p,              /* bfd_check_format */
1322     _bfd_dummy_target,
1323     _bfd_dummy_target,
1324   },
1325   {
1326     bfd_false,
1327     srec_mkobject,
1328     _bfd_generic_mkarchive,
1329     bfd_false,
1330   },
1331   {                             /* bfd_write_contents */
1332     bfd_false,
1333     srec_write_object_contents,
1334     _bfd_write_archive_contents,
1335     bfd_false,
1336   },
1337
1338   BFD_JUMP_TABLE_GENERIC (srec),
1339   BFD_JUMP_TABLE_COPY (_bfd_generic),
1340   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1341   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1342   BFD_JUMP_TABLE_SYMBOLS (srec),
1343   BFD_JUMP_TABLE_RELOCS (srec),
1344   BFD_JUMP_TABLE_WRITE (srec),
1345   BFD_JUMP_TABLE_LINK (srec),
1346   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1347
1348   NULL,
1349
1350   (PTR) 0
1351 };
1352
1353 const bfd_target symbolsrec_vec =
1354 {
1355   "symbolsrec",                 /* name */
1356   bfd_target_srec_flavour,
1357   BFD_ENDIAN_UNKNOWN,           /* target byte order */
1358   BFD_ENDIAN_UNKNOWN,           /* target headers byte order */
1359   (HAS_RELOC | EXEC_P |         /* object flags */
1360    HAS_LINENO | HAS_DEBUG |
1361    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1362   (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
1363    | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1364   0,                            /* leading underscore */
1365   ' ',                          /* ar_pad_char */
1366   16,                           /* ar_max_namelen */
1367   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1368   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1369   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
1370   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1371   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1372   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* hdrs */
1373
1374   {
1375     _bfd_dummy_target,
1376     symbolsrec_object_p,        /* bfd_check_format */
1377     _bfd_dummy_target,
1378     _bfd_dummy_target,
1379   },
1380   {
1381     bfd_false,
1382     srec_mkobject,
1383     _bfd_generic_mkarchive,
1384     bfd_false,
1385   },
1386   {                             /* bfd_write_contents */
1387     bfd_false,
1388     symbolsrec_write_object_contents,
1389     _bfd_write_archive_contents,
1390     bfd_false,
1391   },
1392
1393   BFD_JUMP_TABLE_GENERIC (srec),
1394   BFD_JUMP_TABLE_COPY (_bfd_generic),
1395   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1396   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1397   BFD_JUMP_TABLE_SYMBOLS (srec),
1398   BFD_JUMP_TABLE_RELOCS (srec),
1399   BFD_JUMP_TABLE_WRITE (srec),
1400   BFD_JUMP_TABLE_LINK (srec),
1401   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1402
1403   NULL,
1404
1405   (PTR) 0
1406 };