gas/listing.c

   1 /* listing.c - mainting assembly listings
   2    Copyright (C) 1991, 1992 Free Software Foundation, Inc.
   3
   4 This file is part of GAS, the GNU Assembler.
   5
   6 GAS is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GAS is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GAS; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  19
  20 /*
  21  Contributed by Steve Chamberlain
  22                 sac@cygnus.com
  23
  24
  25  A listing page looks like:
  26
  27  LISTING_HEADER  sourcefilename pagenumber
  28  TITLE LINE
  29  SUBTITLE LINE
  30  linenumber address data  source
  31  linenumber address data  source
  32  linenumber address data  source
  33  linenumber address data  source
  34
  35  If not overridden, the listing commands are:
  36
  37  .title  "stuff"
  38         Put "stuff" onto the title line
  39  .sbttl  "stuff"
  40         Put stuff onto the subtitle line
  41
  42   If these commands come within 10 lines of the top of the page, they
  43   will affect the page they are on, as well as any subsequent page
  44
  45  .eject
  46         Thow a page
  47  .list
  48         Increment the enable listing counter
  49  .nolist
  50         Decrement the enable listing counter
  51
  52  .psize Y[,X]
  53         Set the paper size to X wide and Y high. Setting a psize Y of
  54         zero will suppress form feeds except where demanded by .eject
  55
  56  If the counter goes below zero, listing is suppressed.
  57
  58
  59  Listings are a maintained by read calling various listing_<foo>
  60  functions.  What happens most is that the macro NO_LISTING is not
  61  defined (from the Makefile), then the macro LISTING_NEWLINE expands
  62  into a call to listing_newline.  The call is done from read.c, every
  63  time it sees a newline, and -l is on the command line.
  64
  65  The function listing_newline remembers the frag associated with the
  66  newline, and creates a new frag - note that this is wasteful, but not
  67  a big deal, since listing slows things down a lot anyway.  The
  68  function also rememebers when the filename changes.
  69
  70  When all the input has finished, and gas has had a chance to settle
  71  down, the listing is output. This is done by running down the list of
  72  frag/source file records, and opening the files as needed and printing
  73  out the bytes and chars associated with them.
  74
  75  The only things which the architecture can change about the listing
  76  are defined in these macros:
  77
  78  LISTING_HEADER         The name of the architecture
  79  LISTING_WORD_SIZE      The make of the number of bytes in a word, this determines
  80                         the clumping of the output data. eg a value of
  81                         2 makes words look like 1234 5678, whilst 1
  82                         would make the same value look like 12 34 56
  83                         78
  84  LISTING_LHS_WIDTH      Number of words of above size for the lhs
  85
  86  LISTING_LHS_WIDTH_SECOND   Number of words for the data on the lhs
  87                         for the second line
  88
  89  LISTING_LHS_CONT_LINES Max number of lines to use up for a continutation
  90  LISTING_RHS_WIDTH      Number of chars from the input file to print
  91                         on a line
  92 */
  93
  94 #include <ctype.h>
  95
  96 #include "as.h"
  97 #include <obstack.h>
  98 #include "input-file.h"
  99 #include "subsegs.h"
 100
 101 #ifndef NO_LISTING
 102 #ifndef LISTING_HEADER
 103 #define LISTING_HEADER "GAS LISTING"
 104 #endif
 105 #ifndef LISTING_WORD_SIZE
 106 #define LISTING_WORD_SIZE 4
 107 #endif
 108 #ifndef LISTING_LHS_WIDTH
 109 #define LISTING_LHS_WIDTH 1
 110 #endif
 111 #ifndef LISTING_LHS_WIDTH_SECOND
 112 #define LISTING_LHS_WIDTH_SECOND 1
 113 #endif
 114 #ifndef LISTING_RHS_WIDTH
 115 #define LISTING_RHS_WIDTH 100
 116 #endif
 117 #ifndef LISTING_LHS_CONT_LINES
 118 #define LISTING_LHS_CONT_LINES 4
 119 #endif
 120
 121
 122
 123
 124 /* This structure remembers which .s were used */
 125 typedef struct file_info_struct
 126 {
 127   char *filename;
 128   int linenum;
 129   FILE *file;
 130   struct file_info_struct *next;
 131   int at_end;
 132 }
 133
 134 file_info_type;
 135
 136
 137 /* this structure rememebrs which line from which file goes into which
 138    frag */
 139 typedef struct list_info_struct
 140 {
 141   /* Frag which this line of source is nearest to */
 142   fragS *frag;
 143   /* The actual line in the source file */
 144   unsigned int line;
 145   /* Pointer to the file info struct for the file which this line
 146      belongs to */
 147   file_info_type *file;
 148
 149   /* Next in list */
 150   struct list_info_struct *next;
 151
 152
 153   /* Pointer to the file info struct for the high level language
 154      source line that belongs here */
 155   file_info_type *hll_file;
 156
 157   /* High level language source line */
 158   int hll_line;
 159
 160
 161   /* Pointer to any error message associated with this line */
 162   char *message;
 163
 164   enum
 165     {
 166       EDICT_NONE,
 167       EDICT_SBTTL,
 168       EDICT_TITLE,
 169       EDICT_NOLIST,
 170       EDICT_LIST,
 171       EDICT_EJECT
 172     } edict;
 173   char *edict_arg;
 174
 175 }
 176
 177 list_info_type;
 178
 179
 180 static struct list_info_struct *head;
 181 struct list_info_struct *listing_tail;
 182 extern int listing;
 183 extern fragS *frag_now;
 184
 185
 186 static int paper_width = 200;
 187 static int paper_height = 60;
 188
 189 /* File to output listings to.  */
 190 static FILE *list_file;
 191
 192 /* this static array is used to keep the text of data to be printed
 193    before the start of the line.
 194     It is stored so we can give a bit more info on the next line.  To much, and large
 195    initialized arrays will use up lots of paper.
 196  */
 197
 198 static char data_buffer[100];
 199 static unsigned int data_buffer_size;
 200
 201
 202 /* Prototypes.  */
 203 static void listing_message PARAMS ((const char *name, const char *message));
 204 static file_info_type *file_info PARAMS ((const char *file_name));
 205 static void new_frag PARAMS ((void));
 206 static char *buffer_line PARAMS ((file_info_type *file,
 207                                   char *line, unsigned int size));
 208 static void listing_page PARAMS ((list_info_type *list));
 209 static unsigned int calc_hex PARAMS ((list_info_type *list));
 210 static void print_lines PARAMS ((list_info_type *list,
 211                                  char *string,
 212                                  unsigned int address));
 213 static void list_symbol_table PARAMS ((void));
 214 static void print_source PARAMS ((file_info_type *current_file,
 215                                   list_info_type *list,
 216                                   char *buffer,
 217                                   unsigned int width));
 218 static int debugging_pseudo PARAMS ((char *line));
 219 static void listing_listing PARAMS ((char *name));
 220
 221
 222 static void
 223 listing_message (name, message)
 224      const char *name;
 225      const char *message;
 226 {
 227   unsigned int l = strlen (name) + strlen (message) + 1;
 228   char *n = (char *) xmalloc (l);
 229   strcpy (n, name);
 230   strcat (n, message);
 231   if (listing_tail != (list_info_type *) NULL)
 232     {
 233       listing_tail->message = n;
 234     }
 235 }
 236
 237 void
 238 listing_warning (message)
 239      const char *message;
 240 {
 241   listing_message ("Warning:", message);
 242 }
 243
 244 void
 245 listing_error (message)
 246      const char *message;
 247 {
 248   listing_message ("Error:", message);
 249 }
 250
 251
 252
 253
 254 static file_info_type *file_info_head;
 255
 256 static file_info_type *
 257 file_info (file_name)
 258      const char *file_name;
 259 {
 260   /* Find an entry with this file name */
 261   file_info_type *p = file_info_head;
 262
 263   while (p != (file_info_type *) NULL)
 264     {
 265       if (strcmp (p->filename, file_name) == 0)
 266         return p;
 267       p = p->next;
 268     }
 269
 270   /* Make new entry */
 271
 272   p = (file_info_type *) xmalloc (sizeof (file_info_type));
 273   p->next = file_info_head;
 274   file_info_head = p;
 275   p->filename = xmalloc ((unsigned long) strlen (file_name) + 1);
 276   strcpy (p->filename, file_name);
 277   p->linenum = 0;
 278   p->at_end = 0;
 279
 280   p->file = fopen (p->filename, "r");
 281   if (p->file)
 282     fgetc (p->file);
 283
 284   return p;
 285 }
 286
 287
 288 static void
 289 new_frag ()
 290 {
 291
 292   frag_wane (frag_now);
 293   frag_new (0);
 294
 295 }
 296
 297 void
 298 listing_newline (ps)
 299      char *ps;
 300 {
 301   char *file;
 302   unsigned int line;
 303   static unsigned int last_line = 0xffff;
 304   static char *last_file = NULL;
 305   list_info_type *new;
 306
 307   as_where (&file, &line);
 308   if (line != last_line || (last_file && file && strcmp(file, last_file)))
 309     {
 310       last_line = line;
 311       last_file = file;
 312       new_frag ();
 313
 314       new = (list_info_type *) xmalloc (sizeof (list_info_type));
 315       new->frag = frag_now;
 316       new->line = line;
 317       new->file = file_info (file);
 318
 319       if (listing_tail)
 320         {
 321           listing_tail->next = new;
 322         }
 323       else
 324         {
 325           head = new;
 326         }
 327       listing_tail = new;
 328       new->next = (list_info_type *) NULL;
 329       new->message = (char *) NULL;
 330       new->edict = EDICT_NONE;
 331       new->hll_file = (file_info_type *) NULL;
 332       new->hll_line = 0;
 333       new_frag ();
 334     }
 335 }
 336
 337 /* Attach all current frags to the previous line instead of the
 338    current line.  This is called by the MIPS backend when it discovers
 339    that it needs to add some NOP instructions; the added NOP
 340    instructions should go with the instruction that has the delay, not
 341    with the new instruction.  */
 342
 343 void
 344 listing_prev_line ()
 345 {
 346   list_info_type *l;
 347   fragS *f;
 348
 349   if (head == (list_info_type *) NULL
 350       || head == listing_tail)
 351     return;
 352
 353   new_frag ();
 354
 355   for (l = head; l->next != listing_tail; l = l->next)
 356     ;
 357
 358   for (f = frchain_now->frch_root; f != (fragS *) NULL; f = f->fr_next)
 359     if (f->line == listing_tail)
 360       f->line = l;
 361
 362   listing_tail->frag = frag_now;
 363   new_frag ();
 364 }
 365
 366 /*
 367  This function returns the next source line from the file supplied,
 368  truncated to size.  It appends a fake line to the end of each input
 369  file to make
 370 */
 371
 372 static char *
 373 buffer_line (file, line, size)
 374      file_info_type * file;
 375      char *line;
 376      unsigned int size;
 377 {
 378   unsigned int count = 0;
 379   int c;
 380
 381   char *p = line;
 382
 383   /* If we couldn't open the file, return an empty line */
 384   if (file->file == (FILE *) NULL || file->at_end)
 385     {
 386       return "";
 387     }
 388
 389   if (file->linenum == 0)
 390     rewind (file->file);
 391
 392   c = fgetc (file->file);
 393
 394   size -= 1;                    /* leave room for null */
 395
 396   while (c != EOF && c != '\n')
 397     {
 398       if (count < size)
 399         *p++ = c;
 400       count++;
 401
 402       c = fgetc (file->file);
 403
 404     }
 405   if (c == EOF)
 406     {
 407       file->at_end = 1;
 408       *p++ = '.';
 409       *p++ = '.';
 410       *p++ = '.';
 411     }
 412   file->linenum++;
 413   *p++ = 0;
 414   return line;
 415 }
 416
 417
 418 static const char *fn;
 419
 420 static unsigned int eject;      /* Eject pending */
 421 static unsigned int page;       /* Current page number */
 422 static char *title;             /* current title */
 423 static char *subtitle;          /* current subtitle */
 424 static unsigned int on_page;    /* number of lines printed on current page */
 425
 426
 427 static void
 428 listing_page (list)
 429      list_info_type *list;
 430 {
 431   /* Grope around, see if we can see a title or subtitle edict coming up
 432      soon  (we look down 10 lines of the page and see if it's there)*/
 433   if ((eject || (on_page >= paper_height)) && paper_height != 0)
 434     {
 435       unsigned int c = 10;
 436       int had_title = 0;
 437       int had_subtitle = 0;
 438
 439       page++;
 440
 441       while (c != 0 && list)
 442         {
 443           if (list->edict == EDICT_SBTTL && !had_subtitle)
 444             {
 445               had_subtitle = 1;
 446               subtitle = list->edict_arg;
 447             }
 448           if (list->edict == EDICT_TITLE && !had_title)
 449             {
 450               had_title = 1;
 451               title = list->edict_arg;
 452             }
 453           list = list->next;
 454           c--;
 455         }
 456
 457
 458       if (page > 1)
 459         {
 460           fprintf (list_file, "\f");
 461         }
 462
 463       fprintf (list_file, "%s %s \t\t\tpage %d\n", LISTING_HEADER, fn, page);
 464       fprintf (list_file, "%s\n", title);
 465       fprintf (list_file, "%s\n", subtitle);
 466       on_page = 3;
 467       eject = 0;
 468     }
 469 }
 470
 471
 472 static unsigned int
 473 calc_hex (list)
 474      list_info_type * list;
 475 {
 476   list_info_type *first = list;
 477   unsigned int address = (unsigned int) ~0;
 478
 479   fragS *frag;
 480   fragS *frag_ptr;
 481
 482   unsigned int byte_in_frag;
 483
 484
 485   /* Find first frag which says it belongs to this line */
 486   frag = list->frag;
 487   while (frag && frag->line != list)
 488     frag = frag->fr_next;
 489
 490   frag_ptr = frag;
 491
 492   data_buffer_size = 0;
 493
 494   /* Dump all the frags which belong to this line */
 495   while (frag_ptr != (fragS *) NULL && frag_ptr->line == first)
 496     {
 497       /* Print as many bytes from the fixed part as is sensible */
 498       byte_in_frag = 0;
 499       while (byte_in_frag < frag_ptr->fr_fix && data_buffer_size < sizeof (data_buffer) - 10)
 500         {
 501           if (address == ~0)
 502             {
 503               address = frag_ptr->fr_address;
 504             }
 505
 506           sprintf (data_buffer + data_buffer_size,
 507                    "%02X",
 508                    (frag_ptr->fr_literal[byte_in_frag]) & 0xff);
 509           data_buffer_size += 2;
 510           byte_in_frag++;
 511         }
 512       {
 513         unsigned int var_rep_max = byte_in_frag;
 514         unsigned int var_rep_idx = byte_in_frag;
 515
 516         /* Print as many bytes from the variable part as is sensible */
 517         while (byte_in_frag < frag_ptr->fr_var * frag_ptr->fr_offset
 518                && data_buffer_size < sizeof (data_buffer) - 10)
 519           {
 520             if (address == ~0)
 521               {
 522                 address = frag_ptr->fr_address;
 523               }
 524             sprintf (data_buffer + data_buffer_size,
 525                      "%02X",
 526                      (frag_ptr->fr_literal[var_rep_idx]) & 0xff);
 527 #if 0
 528             data_buffer[data_buffer_size++] = '*';
 529             data_buffer[data_buffer_size++] = '*';
 530 #endif
 531             data_buffer_size += 2;
 532
 533             var_rep_idx++;
 534             byte_in_frag++;
 535
 536             if (var_rep_idx >= frag_ptr->fr_var)
 537               var_rep_idx = var_rep_max;
 538           }
 539       }
 540
 541       frag_ptr = frag_ptr->fr_next;
 542     }
 543   data_buffer[data_buffer_size++] = 0;
 544   return address;
 545 }
 546
 547
 548
 549
 550
 551
 552 static void
 553 print_lines (list, string, address)
 554      list_info_type *list;
 555      char *string;
 556      unsigned int address;
 557 {
 558   unsigned int idx;
 559   unsigned int nchars;
 560   unsigned int lines;
 561   unsigned int byte_in_word = 0;
 562   char *src = data_buffer;
 563
 564   /* Print the stuff on the first line */
 565   listing_page (list);
 566   nchars = (LISTING_WORD_SIZE * 2 + 1) * LISTING_LHS_WIDTH;
 567   /* Print the hex for the first line */
 568   if (address == ~0)
 569     {
 570       fprintf (list_file, "% 4d     ", list->line);
 571       for (idx = 0; idx < nchars; idx++)
 572         fprintf (list_file, " ");
 573
 574       fprintf (list_file, "\t%s\n", string ? string : "");
 575       on_page++;
 576       listing_page (0);
 577
 578     }
 579   else
 580     {
 581       if (had_errors ())
 582         {
 583           fprintf (list_file, "% 4d ???? ", list->line);
 584         }
 585       else
 586         {
 587           fprintf (list_file, "% 4d %04x ", list->line, address);
 588         }
 589
 590       /* And the data to go along with it */
 591       idx = 0;
 592
 593       while (*src && idx < nchars)
 594         {
 595           fprintf (list_file, "%c%c", src[0], src[1]);
 596           src += 2;
 597           byte_in_word++;
 598           if (byte_in_word == LISTING_WORD_SIZE)
 599             {
 600               fprintf (list_file, " ");
 601               idx++;
 602               byte_in_word = 0;
 603             }
 604           idx += 2;
 605         }
 606
 607       for (; idx < nchars; idx++)
 608         fprintf (list_file, " ");
 609
 610       fprintf (list_file, "\t%s\n", string ? string : "");
 611       on_page++;
 612       listing_page (list);
 613       if (list->message)
 614         {
 615           fprintf (list_file, "****  %s\n", list->message);
 616           listing_page (list);
 617           on_page++;
 618         }
 619
 620       for (lines = 0;
 621            lines < LISTING_LHS_CONT_LINES
 622            && *src;
 623            lines++)
 624         {
 625           nchars = ((LISTING_WORD_SIZE * 2) + 1) * LISTING_LHS_WIDTH_SECOND - 1;
 626           idx = 0;
 627           /* Print any more lines of data, but more compactly */
 628           fprintf (list_file, "% 4d      ", list->line);
 629
 630           while (*src && idx < nchars)
 631             {
 632               fprintf (list_file, "%c%c", src[0], src[1]);
 633               src += 2;
 634               idx += 2;
 635               byte_in_word++;
 636               if (byte_in_word == LISTING_WORD_SIZE)
 637                 {
 638                   fprintf (list_file, " ");
 639                   idx++;
 640                   byte_in_word = 0;
 641                 }
 642             }
 643
 644           fprintf (list_file, "\n");
 645           on_page++;
 646           listing_page (list);
 647
 648         }
 649
 650
 651     }
 652 }
 653
 654
 655 static void
 656 list_symbol_table ()
 657 {
 658   extern symbolS *symbol_rootP;
 659   int got_some = 0;
 660
 661   symbolS *ptr;
 662   eject = 1;
 663   listing_page (0);
 664
 665   for (ptr = symbol_rootP; ptr != (symbolS *) NULL; ptr = symbol_next (ptr))
 666     {
 667       if (ptr->sy_frag->line)
 668         {
 669           if (S_GET_NAME (ptr))
 670             {
 671               char buf[30], fmt[8];
 672               valueT val = S_GET_VALUE (ptr);
 673
 674               /* @@ Note that this is dependent on the compilation options,
 675                  not solely on the target characteristics.  */
 676               if (sizeof (val) == 4 && sizeof (int) == 4)
 677                 sprintf (buf, "%08lx", (unsigned long) val);
 678               else if (sizeof (val) <= sizeof (unsigned long))
 679                 {
 680                   sprintf (fmt, "%%0%lulx",
 681                            (unsigned long) (sizeof (val) * 2));
 682                   sprintf (buf, fmt, (unsigned long) val);
 683                 }
 684 #if defined (BFD64)
 685               else if (sizeof (val) > 4)
 686                 {
 687                   char buf1[30];
 688                   sprintf_vma (buf1, val);
 689                   strcpy (buf, "00000000");
 690                   strcpy (buf + 8 - strlen (buf1), buf1);
 691                 }
 692 #endif
 693               else
 694                 abort ();
 695
 696               if (!got_some)
 697                 {
 698                   fprintf (list_file, "DEFINED SYMBOLS\n");
 699                   on_page++;
 700                   got_some = 1;
 701                 }
 702
 703               fprintf (list_file, "%20s:%-5d  %s:%s %s\n",
 704                        ptr->sy_frag->line->file->filename,
 705                        ptr->sy_frag->line->line,
 706                        segment_name (S_GET_SEGMENT (ptr)),
 707                        buf, S_GET_NAME (ptr));
 708
 709               on_page++;
 710               listing_page (0);
 711             }
 712         }
 713
 714     }
 715   if (!got_some)
 716     {
 717       fprintf (list_file, "NO DEFINED SYMBOLS\n");
 718       on_page++;
 719     }
 720   fprintf (list_file, "\n");
 721   on_page++;
 722   listing_page (0);
 723
 724   got_some = 0;
 725
 726   for (ptr = symbol_rootP; ptr != (symbolS *) NULL; ptr = symbol_next (ptr))
 727     {
 728       if (S_GET_NAME (ptr) && strlen (S_GET_NAME (ptr)) != 0)
 729         {
 730           if (ptr->sy_frag->line == 0
 731 #ifdef S_IS_REGISTER
 732               && !S_IS_REGISTER (ptr)
 733 #endif
 734               && S_GET_SEGMENT (ptr) != reg_section)
 735             {
 736               if (!got_some)
 737                 {
 738                   got_some = 1;
 739                   fprintf (list_file, "UNDEFINED SYMBOLS\n");
 740                   on_page++;
 741                   listing_page (0);
 742                 }
 743               fprintf (list_file, "%s\n", S_GET_NAME (ptr));
 744               on_page++;
 745               listing_page (0);
 746             }
 747         }
 748     }
 749   if (!got_some)
 750     {
 751       fprintf (list_file, "NO UNDEFINED SYMBOLS\n");
 752       on_page++;
 753       listing_page (0);
 754     }
 755 }
 756
 757 static void
 758 print_source (current_file, list, buffer, width)
 759      file_info_type *current_file;
 760      list_info_type *list;
 761      char *buffer;
 762      unsigned int width;
 763 {
 764   if (current_file->file)
 765     {
 766       while (current_file->linenum < list->hll_line
 767              && !current_file->at_end)
 768         {
 769           char *p = buffer_line (current_file, buffer, width);
 770           fprintf (list_file, "%4d:%-13s **** %s\n", current_file->linenum,
 771                    current_file->filename, p);
 772           on_page++;
 773           listing_page (list);
 774         }
 775     }
 776 }
 777
 778 /* Sometimes the user doesn't want to be bothered by the debugging
 779    records inserted by the compiler, see if the line is suspicious */
 780
 781 static int
 782 debugging_pseudo (line)
 783      char *line;
 784 {
 785   while (isspace (*line))
 786     line++;
 787
 788   if (*line != '.')
 789     return 0;
 790
 791   line++;
 792
 793   if (strncmp (line, "def", 3) == 0)
 794     return 1;
 795   if (strncmp (line, "val", 3) == 0)
 796     return 1;
 797   if (strncmp (line, "scl", 3) == 0)
 798     return 1;
 799   if (strncmp (line, "line", 4) == 0)
 800     return 1;
 801   if (strncmp (line, "endef", 5) == 0)
 802     return 1;
 803   if (strncmp (line, "ln", 2) == 0)
 804     return 1;
 805   if (strncmp (line, "type", 4) == 0)
 806     return 1;
 807   if (strncmp (line, "size", 4) == 0)
 808     return 1;
 809   if (strncmp (line, "dim", 3) == 0)
 810     return 1;
 811   if (strncmp (line, "tag", 3) == 0)
 812     return 1;
 813
 814   if (strncmp (line, "stabs", 5) == 0)
 815     return 1;
 816   if (strncmp (line, "stabn", 5) == 0)
 817     return 1;
 818
 819   return 0;
 820
 821 }
 822
 823 static void
 824 listing_listing (name)
 825      char *name;
 826 {
 827   list_info_type *list = head;
 828   file_info_type *current_hll_file = (file_info_type *) NULL;
 829   char *message;
 830   char *buffer;
 831   char *p;
 832   int show_listing = 1;
 833   unsigned int width;
 834
 835   buffer = xmalloc (LISTING_RHS_WIDTH);
 836   eject = 1;
 837   list = head;
 838
 839   while (list != (list_info_type *) NULL && 0)
 840     {
 841       if (list->next)
 842         list->frag = list->next->frag;
 843       list = list->next;
 844
 845     }
 846
 847   list = head->next;
 848
 849
 850   while (list)
 851     {
 852       width = LISTING_RHS_WIDTH > paper_width ? paper_width :
 853         LISTING_RHS_WIDTH;
 854
 855       switch (list->edict)
 856         {
 857         case EDICT_LIST:
 858           show_listing++;
 859           break;
 860         case EDICT_NOLIST:
 861           show_listing--;
 862           break;
 863         case EDICT_EJECT:
 864           break;
 865         case EDICT_NONE:
 866           break;
 867         case EDICT_TITLE:
 868           title = list->edict_arg;
 869           break;
 870         case EDICT_SBTTL:
 871           subtitle = list->edict_arg;
 872           break;
 873         default:
 874           abort ();
 875         }
 876
 877       if (show_listing > 0)
 878         {
 879           /* Scan down the list and print all the stuff which can be done
 880              with this line (or lines).  */
 881           message = 0;
 882
 883           if (list->hll_file)
 884             {
 885               current_hll_file = list->hll_file;
 886             }
 887
 888           if (current_hll_file && list->hll_line && listing & LISTING_HLL)
 889             {
 890               print_source (current_hll_file, list, buffer, width);
 891             }
 892
 893           while (list->file->file
 894                  && list->file->linenum < list->line
 895                  && !list->file->at_end)
 896             {
 897               p = buffer_line (list->file, buffer, width);
 898
 899               if (!((listing & LISTING_NODEBUG) && debugging_pseudo (p)))
 900                 {
 901                   print_lines (list, p, calc_hex (list));
 902                 }
 903             }
 904
 905           if (list->edict == EDICT_EJECT)
 906             {
 907               eject = 1;
 908             }
 909         }
 910       else
 911         {
 912           while (list->file->file
 913                  && list->file->linenum < list->line
 914                  && !list->file->at_end)
 915             p = buffer_line (list->file, buffer, width);
 916         }
 917
 918       list = list->next;
 919     }
 920   free (buffer);
 921 }
 922
 923 void
 924 listing_print (name)
 925      char *name;
 926 {
 927   title = "";
 928   subtitle = "";
 929
 930   if (name == NULL)
 931     list_file = stdout;
 932   else
 933     {
 934       list_file = fopen (name, "w");
 935       if (list_file == NULL)
 936         {
 937           as_perror ("can't open list file: %s", name);
 938           list_file = stdout;
 939         }
 940     }
 941
 942   if (listing & LISTING_NOFORM)
 943     {
 944       paper_height = 0;
 945     }
 946
 947   if (listing & LISTING_LISTING)
 948     {
 949       listing_listing (name);
 950
 951     }
 952   if (listing & LISTING_SYMBOLS)
 953     {
 954       list_symbol_table ();
 955     }
 956 }
 957
 958
 959 void
 960 listing_file (name)
 961      const char *name;
 962 {
 963   fn = name;
 964 }
 965
 966 void
 967 listing_eject (ignore)
 968      int ignore;
 969 {
 970   listing_tail->edict = EDICT_EJECT;
 971 }
 972
 973 void
 974 listing_flags (ignore)
 975      int ignore;
 976 {
 977   while ((*input_line_pointer++) && (*input_line_pointer != '\n'))
 978     input_line_pointer++;
 979
 980 }
 981
 982 void
 983 listing_list (on)
 984      int on;
 985 {
 986   listing_tail->edict = on ? EDICT_LIST : EDICT_NOLIST;
 987 }
 988
 989
 990 void
 991 listing_psize (ignore)
 992      int ignore;
 993 {
 994   paper_height = get_absolute_expression ();
 995
 996   if (paper_height < 0 || paper_height > 1000)
 997     {
 998       paper_height = 0;
 999       as_warn ("strange paper height, set to no form");
1000     }
1001   if (*input_line_pointer == ',')
1002     {
1003       input_line_pointer++;
1004       paper_width = get_absolute_expression ();
1005     }
1006 }
1007
1008
1009 void
1010 listing_title (depth)
1011      int depth;
1012 {
1013   char *start;
1014   char *ttl;
1015   unsigned int length;
1016
1017   SKIP_WHITESPACE ();
1018   if (*input_line_pointer == '\"')
1019     {
1020       input_line_pointer++;
1021       start = input_line_pointer;
1022
1023       while (*input_line_pointer)
1024         {
1025           if (*input_line_pointer == '\"')
1026             {
1027               length = input_line_pointer - start;
1028               ttl = xmalloc (length + 1);
1029               memcpy (ttl, start, length);
1030               ttl[length] = 0;
1031               listing_tail->edict = depth ? EDICT_SBTTL : EDICT_TITLE;
1032               listing_tail->edict_arg = ttl;
1033               input_line_pointer++;
1034               demand_empty_rest_of_line ();
1035               return;
1036             }
1037           else if (*input_line_pointer == '\n')
1038             {
1039               as_bad ("New line in title");
1040               demand_empty_rest_of_line ();
1041               return;
1042             }
1043           else
1044             {
1045               input_line_pointer++;
1046             }
1047         }
1048     }
1049   else
1050     {
1051       as_bad ("expecting title in quotes");
1052     }
1053 }
1054
1055
1056
1057 void
1058 listing_source_line (line)
1059      unsigned int line;
1060 {
1061   new_frag ();
1062   listing_tail->hll_line = line;
1063   new_frag ();
1064
1065 }
1066
1067 void
1068 listing_source_file (file)
1069      const char *file;
1070 {
1071   if (listing_tail)
1072     listing_tail->hll_file = file_info (file);
1073 }
1074
1075
1076
1077 #else
1078
1079
1080 /* Dummy functions for when compiled without listing enabled */
1081
1082 void
1083 listing_flags (ignore)
1084      int ignore;
1085 {
1086   s_ignore (0);
1087 }
1088
1089 void
1090 listing_list (on)
1091      int on;
1092 {
1093   s_ignore (0);
1094 }
1095
1096 void
1097 listing_eject (ignore)
1098      int ignore;
1099 {
1100   s_ignore (0);
1101 }
1102
1103 void
1104 listing_psize (ignore)
1105      int ignore;
1106 {
1107   s_ignore (0);
1108 }
1109
1110 void
1111 listing_title (depth)
1112      int depth;
1113 {
1114   s_ignore (0);
1115 }
1116
1117 void
1118 listing_file (name)
1119      const char *name;
1120 {
1121
1122 }
1123
1124 void
1125 listing_newline (name)
1126      char *name;
1127 {
1128
1129 }
1130
1131 void
1132 listing_source_line (n)
1133      unsigned int n;
1134 {
1135
1136 }
1137 void
1138 listing_source_file (n)
1139      const char *n;
1140 {
1141
1142 }
1143
1144 #endif