gas/messages.c

   1 /* messages.c - error reporter -
   2    Copyright 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001, 2003
   3    Free Software Foundation, Inc.
   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 the Free
  18    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 #include "as.h"
  22
  23 #include <stdio.h>
  24 #ifdef HAVE_ERRNO_H
  25 #include <errno.h>
  26 #endif
  27
  28 #ifdef USE_STDARG
  29 #include <stdarg.h>
  30 #endif
  31
  32 #ifdef USE_VARARGS
  33 #include <varargs.h>
  34 #endif
  35
  36 #if !defined (USE_STDARG) && !defined (USE_VARARGS)
  37 /* Roll our own.  */
  38 #define va_alist REST
  39 #define va_dcl
  40 typedef int * va_list;
  41 #define va_start(ARGS)  ARGS = &REST
  42 #define va_end(ARGS)
  43 #endif
  44
  45 static void identify (char *);
  46 static void as_show_where (void);
  47 static void as_warn_internal (char *, unsigned int, char *);
  48 static void as_bad_internal (char *, unsigned int, char *);
  49
  50 /* Despite the rest of the comments in this file, (FIXME-SOON),
  51    here is the current scheme for error messages etc:
  52
  53    as_fatal() is used when gas is quite confused and
  54    continuing the assembly is pointless.  In this case we
  55    exit immediately with error status.
  56
  57    as_bad() is used to mark errors that result in what we
  58    presume to be a useless object file.  Say, we ignored
  59    something that might have been vital.  If we see any of
  60    these, assembly will continue to the end of the source,
  61    no object file will be produced, and we will terminate
  62    with error status.  The new option, -Z, tells us to
  63    produce an object file anyway but we still exit with
  64    error status.  The assumption here is that you don't want
  65    this object file but we could be wrong.
  66
  67    as_warn() is used when we have an error from which we
  68    have a plausible error recovery.  eg, masking the top
  69    bits of a constant that is longer than will fit in the
  70    destination.  In this case we will continue to assemble
  71    the source, although we may have made a bad assumption,
  72    and we will produce an object file and return normal exit
  73    status (ie, no error).  The new option -X tells us to
  74    treat all as_warn() errors as as_bad() errors.  That is,
  75    no object file will be produced and we will exit with
  76    error status.  The idea here is that we don't kill an
  77    entire make because of an error that we knew how to
  78    correct.  On the other hand, sometimes you might want to
  79    stop the make at these points.
  80
  81    as_tsktsk() is used when we see a minor error for which
  82    our error recovery action is almost certainly correct.
  83    In this case, we print a message and then assembly
  84    continues as though no error occurred.  */
  85
  86 static void
  87 identify (char *file)
  88 {
  89   static int identified;
  90
  91   if (identified)
  92     return;
  93   identified++;
  94
  95   if (!file)
  96     {
  97       unsigned int x;
  98       as_where (&file, &x);
  99     }
 100
 101   if (file)
 102     fprintf (stderr, "%s: ", file);
 103   fprintf (stderr, _("Assembler messages:\n"));
 104 }
 105
 106 /* The number of warnings issued.  */
 107 static int warning_count;
 108
 109 int
 110 had_warnings (void)
 111 {
 112   return warning_count;
 113 }
 114
 115 /* Nonzero if we've hit a 'bad error', and should not write an obj file,
 116    and exit with a nonzero error code.  */
 117
 118 static int error_count;
 119
 120 int
 121 had_errors (void)
 122 {
 123   return error_count;
 124 }
 125
 126 /* Print the current location to stderr.  */
 127
 128 static void
 129 as_show_where (void)
 130 {
 131   char *file;
 132   unsigned int line;
 133
 134   as_where (&file, &line);
 135   identify (file);
 136   if (file)
 137     fprintf (stderr, "%s:%u: ", file, line);
 138 }
 139
 140 /* Like perror(3), but with more info.  */
 141
 142 void
 143 as_perror (const char *gripe,           /* Unpunctuated error theme.  */
 144            const char *filename)
 145 {
 146   const char *errtxt;
 147   int saved_errno = errno;
 148
 149   as_show_where ();
 150   fprintf (stderr, gripe, filename);
 151   errno = saved_errno;
 152 #ifdef BFD_ASSEMBLER
 153   errtxt = bfd_errmsg (bfd_get_error ());
 154 #else
 155   errtxt = xstrerror (errno);
 156 #endif
 157   fprintf (stderr, ": %s\n", errtxt);
 158   errno = 0;
 159 #ifdef BFD_ASSEMBLER
 160   bfd_set_error (bfd_error_no_error);
 161 #endif
 162 }
 163
 164 /* Send to stderr a string as a warning, and locate warning
 165    in input file(s).
 166    Please only use this for when we have some recovery action.
 167    Please explain in string (which may have '\n's) what recovery was
 168    done.  */
 169
 170 #ifdef USE_STDARG
 171 void
 172 as_tsktsk (const char *format, ...)
 173 {
 174   va_list args;
 175
 176   as_show_where ();
 177   va_start (args, format);
 178   vfprintf (stderr, format, args);
 179   va_end (args);
 180   (void) putc ('\n', stderr);
 181 }
 182 #else
 183 void
 184 as_tsktsk (format, va_alist)
 185      const char *format;
 186      va_dcl
 187 {
 188   va_list args;
 189
 190   as_show_where ();
 191   va_start (args);
 192   vfprintf (stderr, format, args);
 193   va_end (args);
 194   (void) putc ('\n', stderr);
 195 }
 196 #endif /* not NO_STDARG */
 197
 198 /* The common portion of as_warn and as_warn_where.  */
 199
 200 static void
 201 as_warn_internal (char *file, unsigned int line, char *buffer)
 202 {
 203   ++warning_count;
 204
 205   if (file == NULL)
 206     as_where (&file, &line);
 207
 208   identify (file);
 209   if (file)
 210     fprintf (stderr, "%s:%u: ", file, line);
 211   fprintf (stderr, _("Warning: "));
 212   fputs (buffer, stderr);
 213   (void) putc ('\n', stderr);
 214 #ifndef NO_LISTING
 215   listing_warning (buffer);
 216 #endif
 217 }
 218
 219 /* Send to stderr a string as a warning, and locate warning
 220    in input file(s).
 221    Please only use this for when we have some recovery action.
 222    Please explain in string (which may have '\n's) what recovery was
 223    done.  */
 224
 225 #ifdef USE_STDARG
 226 void
 227 as_warn (const char *format, ...)
 228 {
 229   va_list args;
 230   char buffer[2000];
 231
 232   if (!flag_no_warnings)
 233     {
 234       va_start (args, format);
 235       vsprintf (buffer, format, args);
 236       va_end (args);
 237       as_warn_internal ((char *) NULL, 0, buffer);
 238     }
 239 }
 240 #else
 241 void
 242 as_warn (format, va_alist)
 243      const char *format;
 244      va_dcl
 245 {
 246   va_list args;
 247   char buffer[2000];
 248
 249   if (!flag_no_warnings)
 250     {
 251       va_start (args);
 252       vsprintf (buffer, format, args);
 253       va_end (args);
 254       as_warn_internal ((char *) NULL, 0, buffer);
 255     }
 256 }
 257 #endif /* not NO_STDARG */
 258
 259 /* Like as_bad but the file name and line number are passed in.
 260    Unfortunately, we have to repeat the function in order to handle
 261    the varargs correctly and portably.  */
 262
 263 #ifdef USE_STDARG
 264 void
 265 as_warn_where (char *file, unsigned int line, const char *format, ...)
 266 {
 267   va_list args;
 268   char buffer[2000];
 269
 270   if (!flag_no_warnings)
 271     {
 272       va_start (args, format);
 273       vsprintf (buffer, format, args);
 274       va_end (args);
 275       as_warn_internal (file, line, buffer);
 276     }
 277 }
 278 #else
 279 void
 280 as_warn_where (file, line, format, va_alist)
 281      char *file;
 282      unsigned int line;
 283      const char *format;
 284      va_dcl
 285 {
 286   va_list args;
 287   char buffer[2000];
 288
 289   if (!flag_no_warnings)
 290     {
 291       va_start (args);
 292       vsprintf (buffer, format, args);
 293       va_end (args);
 294       as_warn_internal (file, line, buffer);
 295     }
 296 }
 297 #endif /* not NO_STDARG */
 298
 299 /* The common portion of as_bad and as_bad_where.  */
 300
 301 static void
 302 as_bad_internal (char *file, unsigned int line, char *buffer)
 303 {
 304   ++error_count;
 305
 306   if (file == NULL)
 307     as_where (&file, &line);
 308
 309   identify (file);
 310   if (file)
 311     fprintf (stderr, "%s:%u: ", file, line);
 312   fprintf (stderr, _("Error: "));
 313   fputs (buffer, stderr);
 314   (void) putc ('\n', stderr);
 315 #ifndef NO_LISTING
 316   listing_error (buffer);
 317 #endif
 318 }
 319
 320 /* Send to stderr a string as a warning, and locate warning in input
 321    file(s).  Please us when there is no recovery, but we want to
 322    continue processing but not produce an object file.
 323    Please explain in string (which may have '\n's) what recovery was
 324    done.  */
 325
 326 #ifdef USE_STDARG
 327 void
 328 as_bad (const char *format, ...)
 329 {
 330   va_list args;
 331   char buffer[2000];
 332
 333   va_start (args, format);
 334   vsprintf (buffer, format, args);
 335   va_end (args);
 336
 337   as_bad_internal ((char *) NULL, 0, buffer);
 338 }
 339
 340 #else
 341 void
 342 as_bad (format, va_alist)
 343      const char *format;
 344      va_dcl
 345 {
 346   va_list args;
 347   char buffer[2000];
 348
 349   va_start (args);
 350   vsprintf (buffer, format, args);
 351   va_end (args);
 352
 353   as_bad_internal ((char *) NULL, 0, buffer);
 354 }
 355 #endif /* not NO_STDARG */
 356
 357 /* Like as_bad but the file name and line number are passed in.
 358    Unfortunately, we have to repeat the function in order to handle
 359    the varargs correctly and portably.  */
 360
 361 #ifdef USE_STDARG
 362 void
 363 as_bad_where (char *file, unsigned int line, const char *format, ...)
 364 {
 365   va_list args;
 366   char buffer[2000];
 367
 368   va_start (args, format);
 369   vsprintf (buffer, format, args);
 370   va_end (args);
 371
 372   as_bad_internal (file, line, buffer);
 373 }
 374
 375 #else
 376 void
 377 as_bad_where (file, line, format, va_alist)
 378      char *file;
 379      unsigned int line;
 380      const char *format;
 381      va_dcl
 382 {
 383   va_list args;
 384   char buffer[2000];
 385
 386   va_start (args);
 387   vsprintf (buffer, format, args);
 388   va_end (args);
 389
 390   as_bad_internal (file, line, buffer);
 391 }
 392 #endif /* not NO_STDARG */
 393
 394 /* Send to stderr a string as a fatal message, and print location of
 395    error in input file(s).
 396    Please only use this for when we DON'T have some recovery action.
 397    It xexit()s with a warning status.  */
 398
 399 #ifdef USE_STDARG
 400 void
 401 as_fatal (const char *format, ...)
 402 {
 403   va_list args;
 404
 405   as_show_where ();
 406   va_start (args, format);
 407   fprintf (stderr, _("Fatal error: "));
 408   vfprintf (stderr, format, args);
 409   (void) putc ('\n', stderr);
 410   va_end (args);
 411   /* Delete the output file, if it exists.  This will prevent make from
 412      thinking that a file was created and hence does not need rebuilding.  */
 413   if (out_file_name != NULL)
 414     unlink (out_file_name);
 415   xexit (EXIT_FAILURE);
 416 }
 417 #else
 418 void
 419 as_fatal (format, va_alist)
 420      char *format;
 421      va_dcl
 422 {
 423   va_list args;
 424
 425   as_show_where ();
 426   va_start (args);
 427   fprintf (stderr, _("Fatal error: "));
 428   vfprintf (stderr, format, args);
 429   (void) putc ('\n', stderr);
 430   va_end (args);
 431   xexit (EXIT_FAILURE);
 432 }
 433 #endif /* not NO_STDARG */
 434
 435 /* Indicate assertion failure.
 436    Arguments: Filename, line number, optional function name.  */
 437
 438 void
 439 as_assert (const char *file, int line, const char *fn)
 440 {
 441   as_show_where ();
 442   fprintf (stderr, _("Internal error!\n"));
 443   if (fn)
 444     fprintf (stderr, _("Assertion failure in %s at %s line %d.\n"),
 445              fn, file, line);
 446   else
 447     fprintf (stderr, _("Assertion failure at %s line %d.\n"), file, line);
 448   fprintf (stderr, _("Please report this bug.\n"));
 449   xexit (EXIT_FAILURE);
 450 }
 451
 452 /* as_abort: Print a friendly message saying how totally hosed we are,
 453    and exit without producing a core file.  */
 454
 455 void
 456 as_abort (const char *file, int line, const char *fn)
 457 {
 458   as_show_where ();
 459   if (fn)
 460     fprintf (stderr, _("Internal error, aborting at %s line %d in %s\n"),
 461              file, line, fn);
 462   else
 463     fprintf (stderr, _("Internal error, aborting at %s line %d\n"),
 464              file, line);
 465   fprintf (stderr, _("Please report this bug.\n"));
 466   xexit (EXIT_FAILURE);
 467 }
 468
 469 /* Support routines.  */
 470
 471 void
 472 fprint_value (FILE *file, valueT val)
 473 {
 474   if (sizeof (val) <= sizeof (long))
 475     {
 476       fprintf (file, "%ld", (long) val);
 477       return;
 478     }
 479 #ifdef BFD_ASSEMBLER
 480   if (sizeof (val) <= sizeof (bfd_vma))
 481     {
 482       fprintf_vma (file, val);
 483       return;
 484     }
 485 #endif
 486   abort ();
 487 }
 488
 489 void
 490 sprint_value (char *buf, valueT val)
 491 {
 492   if (sizeof (val) <= sizeof (long))
 493     {
 494       sprintf (buf, "%ld", (long) val);
 495       return;
 496     }
 497 #ifdef BFD_ASSEMBLER
 498   if (sizeof (val) <= sizeof (bfd_vma))
 499     {
 500       sprintf_vma (buf, val);
 501       return;
 502     }
 503 #endif
 504   abort ();
 505 }