455 lines
12 KiB
C
455 lines
12 KiB
C
/* messages.c - error reporter -
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Copyright (C) 1987-2022 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "as.h"
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#include <signal.h>
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/* If the system doesn't provide strsignal, we get it defined in
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libiberty but no declaration is supplied. Because, reasons. */
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#if !defined (HAVE_STRSIGNAL) && !defined (strsignal)
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extern const char *strsignal (int);
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#endif
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static void identify (const char *);
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static void as_show_where (void);
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static void as_warn_internal (const char *, unsigned int, char *);
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static void as_bad_internal (const char *, unsigned int, char *);
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static void signal_crash (int) ATTRIBUTE_NORETURN;
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/* Despite the rest of the comments in this file, (FIXME-SOON),
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here is the current scheme for error messages etc:
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as_fatal() is used when gas is quite confused and
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continuing the assembly is pointless. In this case we
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exit immediately with error status.
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as_bad() is used to mark errors that result in what we
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presume to be a useless object file. Say, we ignored
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something that might have been vital. If we see any of
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these, assembly will continue to the end of the source,
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no object file will be produced, and we will terminate
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with error status. The new option, -Z, tells us to
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produce an object file anyway but we still exit with
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error status. The assumption here is that you don't want
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this object file but we could be wrong.
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as_warn() is used when we have an error from which we
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have a plausible error recovery. eg, masking the top
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bits of a constant that is longer than will fit in the
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destination. In this case we will continue to assemble
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the source, although we may have made a bad assumption,
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and we will produce an object file and return normal exit
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status (ie, no error). The new option -X tells us to
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treat all as_warn() errors as as_bad() errors. That is,
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no object file will be produced and we will exit with
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error status. The idea here is that we don't kill an
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entire make because of an error that we knew how to
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correct. On the other hand, sometimes you might want to
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stop the make at these points.
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as_tsktsk() is used when we see a minor error for which
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our error recovery action is almost certainly correct.
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In this case, we print a message and then assembly
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continues as though no error occurred.
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as_abort () is used for logic failure (assert or abort, signal).
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*/
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static void
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identify (const char *file)
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{
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static int identified;
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if (identified)
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return;
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identified++;
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if (!file)
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{
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unsigned int x;
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file = as_where (&x);
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}
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if (file)
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fprintf (stderr, "%s: ", file);
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fprintf (stderr, _("Assembler messages:\n"));
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}
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/* The number of warnings issued. */
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static int warning_count;
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int
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had_warnings (void)
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{
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return warning_count;
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}
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/* Nonzero if we've hit a 'bad error', and should not write an obj file,
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and exit with a nonzero error code. */
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static int error_count;
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int
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had_errors (void)
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{
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return error_count;
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}
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/* Print the current location to stderr. */
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static void
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as_show_where (void)
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{
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const char *file;
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unsigned int line;
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file = as_where (&line);
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identify (file);
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if (file)
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{
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if (line != 0)
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fprintf (stderr, "%s:%u: ", file, line);
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else
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fprintf (stderr, "%s: ", file);
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}
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}
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/* Send to stderr a string as a warning, and locate warning
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in input file(s).
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Please only use this for when we have some recovery action.
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Please explain in string (which may have '\n's) what recovery was
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done. */
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void
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as_tsktsk (const char *format, ...)
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{
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va_list args;
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as_show_where ();
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va_start (args, format);
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vfprintf (stderr, format, args);
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va_end (args);
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(void) putc ('\n', stderr);
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}
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/* The common portion of as_warn and as_warn_where. */
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static void
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as_warn_internal (const char *file, unsigned int line, char *buffer)
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{
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++warning_count;
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if (file == NULL)
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file = as_where (&line);
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identify (file);
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if (file)
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{
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if (line != 0)
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fprintf (stderr, "%s:%u: %s%s\n", file, line, _("Warning: "), buffer);
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else
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fprintf (stderr, "%s: %s%s\n", file, _("Warning: "), buffer);
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}
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else
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fprintf (stderr, "%s%s\n", _("Warning: "), buffer);
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#ifndef NO_LISTING
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listing_warning (buffer);
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#endif
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}
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/* Send to stderr a string as a warning, and locate warning
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in input file(s).
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Please only use this for when we have some recovery action.
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Please explain in string (which may have '\n's) what recovery was
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done. */
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void
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as_warn (const char *format, ...)
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{
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va_list args;
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char buffer[2000];
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if (!flag_no_warnings)
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{
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va_start (args, format);
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vsnprintf (buffer, sizeof (buffer), format, args);
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va_end (args);
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as_warn_internal ((char *) NULL, 0, buffer);
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}
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}
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/* Like as_bad but the file name and line number are passed in.
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Unfortunately, we have to repeat the function in order to handle
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the varargs correctly and portably. */
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void
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as_warn_where (const char *file, unsigned int line, const char *format, ...)
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{
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va_list args;
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char buffer[2000];
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if (!flag_no_warnings)
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{
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va_start (args, format);
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vsnprintf (buffer, sizeof (buffer), format, args);
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va_end (args);
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as_warn_internal (file, line, buffer);
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}
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}
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/* The common portion of as_bad and as_bad_where. */
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static void
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as_bad_internal (const char *file, unsigned int line, char *buffer)
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{
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++error_count;
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if (file == NULL)
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file = as_where (&line);
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identify (file);
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if (file)
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{
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if (line != 0)
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fprintf (stderr, "%s:%u: %s%s\n", file, line, _("Error: "), buffer);
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else
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fprintf (stderr, "%s: %s%s\n", file, _("Error: "), buffer);
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}
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else
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fprintf (stderr, "%s%s\n", _("Error: "), buffer);
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#ifndef NO_LISTING
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listing_error (buffer);
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#endif
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}
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/* Send to stderr a string as a warning, and locate warning in input
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file(s). Please use when there is no recovery, but we want to
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continue processing but not produce an object file.
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Please explain in string (which may have '\n's) what recovery was
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done. */
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void
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as_bad (const char *format, ...)
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{
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va_list args;
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char buffer[2000];
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va_start (args, format);
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vsnprintf (buffer, sizeof (buffer), format, args);
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va_end (args);
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as_bad_internal ((char *) NULL, 0, buffer);
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}
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/* Like as_bad but the file name and line number are passed in.
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Unfortunately, we have to repeat the function in order to handle
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the varargs correctly and portably. */
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void
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as_bad_where (const char *file, unsigned int line, const char *format, ...)
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{
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va_list args;
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char buffer[2000];
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va_start (args, format);
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vsnprintf (buffer, sizeof (buffer), format, args);
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va_end (args);
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as_bad_internal (file, line, buffer);
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}
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/* Send to stderr a string as a fatal message, and print location of
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error in input file(s).
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Please only use this for when we DON'T have some recovery action.
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It xexit()s with a warning status. */
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void
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as_fatal (const char *format, ...)
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{
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va_list args;
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as_show_where ();
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va_start (args, format);
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fprintf (stderr, _("Fatal error: "));
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vfprintf (stderr, format, args);
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(void) putc ('\n', stderr);
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va_end (args);
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/* Delete the output file, if it exists. This will prevent make from
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thinking that a file was created and hence does not need rebuilding. */
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if (out_file_name != NULL)
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unlink_if_ordinary (out_file_name);
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xexit (EXIT_FAILURE);
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}
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/* Indicate internal constency error.
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Arguments: Filename, line number, optional function name.
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FILENAME may be NULL, which we use for crash-via-signal. */
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void
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as_abort (const char *file, int line, const char *fn)
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{
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as_show_where ();
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if (!file)
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fprintf (stderr, _("Internal error (%s).\n"), fn ? fn : "unknown");
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else if (fn)
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fprintf (stderr, _("Internal error in %s at %s:%d.\n"), fn, file, line);
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else
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fprintf (stderr, _("Internal error at %s:%d.\n"), file, line);
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fprintf (stderr, _("Please report this bug.\n"));
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xexit (EXIT_FAILURE);
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}
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/* Handler for fatal signals, such as SIGSEGV. */
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static void
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signal_crash (int signo)
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{
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/* Reset, to prevent unbounded recursion. */
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signal (signo, SIG_DFL);
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as_abort (NULL, 0, strsignal (signo));
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}
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/* Register signal handlers, for less abrubt crashes. */
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void
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signal_init (void)
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{
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#ifdef SIGSEGV
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signal (SIGSEGV, signal_crash);
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#endif
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#ifdef SIGILL
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signal (SIGILL, signal_crash);
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#endif
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#ifdef SIGBUS
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signal (SIGBUS, signal_crash);
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#endif
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#ifdef SIGABRT
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signal (SIGABRT, signal_crash);
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#endif
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#if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
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signal (SIGIOT, signal_crash);
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#endif
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#ifdef SIGFPE
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signal (SIGFPE, signal_crash);
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#endif
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}
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/* Support routines. */
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#define HEX_MAX_THRESHOLD 1024
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#define HEX_MIN_THRESHOLD -(HEX_MAX_THRESHOLD)
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static void
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as_internal_value_out_of_range (const char *prefix,
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offsetT val,
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offsetT min,
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offsetT max,
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const char *file,
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unsigned line,
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bool bad)
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{
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const char * err;
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/* These buffer sizes are excessive, but better to be safe than sorry.
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Note - these buffers are used in order to make the error message
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string translateable. */
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char val_buf [128];
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char min_buf [128];
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char max_buf [128];
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if (prefix == NULL)
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prefix = "";
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if (val >= min && val <= max)
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{
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addressT right = max & -max;
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if (max <= 1)
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abort ();
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sprintf (val_buf, "%" BFD_VMA_FMT "d", val);
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sprintf (min_buf, "%" BFD_VMA_FMT "d", right);
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/* xgettext:c-format */
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err = _("%s out of domain (%s is not a multiple of %s)");
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if (bad)
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as_bad_where (file, line, err, prefix, val_buf, min_buf);
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else
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as_warn_where (file, line, err, prefix, val_buf, min_buf);
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}
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else if ( val < HEX_MAX_THRESHOLD
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&& min < HEX_MAX_THRESHOLD
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&& max < HEX_MAX_THRESHOLD
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&& val > HEX_MIN_THRESHOLD
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&& min > HEX_MIN_THRESHOLD
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&& max > HEX_MIN_THRESHOLD)
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{
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sprintf (val_buf, "%" BFD_VMA_FMT "d", val);
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sprintf (min_buf, "%" BFD_VMA_FMT "d", min);
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sprintf (max_buf, "%" BFD_VMA_FMT "d", max);
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/* xgettext:c-format. */
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err = _("%s out of range (%s is not between %s and %s)");
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if (bad)
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as_bad_where (file, line, err, prefix, val_buf, min_buf, max_buf);
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else
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as_warn_where (file, line, err, prefix, val_buf, min_buf, max_buf);
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}
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else
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{
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sprintf_vma (val_buf, (bfd_vma) val);
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sprintf_vma (min_buf, (bfd_vma) min);
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sprintf_vma (max_buf, (bfd_vma) max);
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/* xgettext:c-format. */
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err = _("%s out of range (0x%s is not between 0x%s and 0x%s)");
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if (bad)
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as_bad_where (file, line, err, prefix, val_buf, min_buf, max_buf);
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else
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as_warn_where (file, line, err, prefix, val_buf, min_buf, max_buf);
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}
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}
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void
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as_warn_value_out_of_range (const char *prefix,
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offsetT value,
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offsetT min,
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offsetT max,
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const char *file,
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unsigned line)
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{
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as_internal_value_out_of_range (prefix, value, min, max, file, line, false);
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}
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void
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as_bad_value_out_of_range (const char *prefix,
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offsetT value,
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offsetT min,
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offsetT max,
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const char *file,
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unsigned line)
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{
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as_internal_value_out_of_range (prefix, value, min, max, file, line, true);
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}
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