gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gas / messages.c

diff --git a/gas/messages.c b/gas/messages.c
index ad40ca8a24609cf6ca8b4e8c14d2f94230dfd3ca..83bda87919931154a1716a4e8ba65e0688ae72f9 100644 (file)
--- a/gas/messages.c
+++ b/gas/messages.c
@@ -1,5 +1,5 @@
 /* messages.c - error reporter -
-   Copyright (C) 1987-2016 Free Software Foundation, Inc.
+   Copyright (C) 1987-2020 Free Software Foundation, Inc.
    This file is part of GAS, the GNU Assembler.
 
    GAS is free software; you can redistribute it and/or modify
@@ -18,11 +18,19 @@
    02110-1301, USA.  */
 
 #include "as.h"
+#include <signal.h>
+
+/* If the system doesn't provide strsignal, we get it defined in
+   libiberty but no declaration is supplied.  Because, reasons. */
+#if !defined (HAVE_STRSIGNAL) && !defined (strsignal)
+extern const char *strsignal (int);
+#endif
 
 static void identify (const char *);
 static void as_show_where (void);
 static void as_warn_internal (const char *, unsigned int, char *);
 static void as_bad_internal (const char *, unsigned int, char *);
+static void signal_crash (int) ATTRIBUTE_NORETURN;
 
 /* Despite the rest of the comments in this file, (FIXME-SOON),
    here is the current scheme for error messages etc:
@@ -58,7 +66,10 @@ static void as_bad_internal (const char *, unsigned int, char *);
    as_tsktsk() is used when we see a minor error for which
    our error recovery action is almost certainly correct.
    In this case, we print a message and then assembly
-   continues as though no error occurred.  */
+   continues as though no error occurred.
+
+   as_abort () is used for logic failure (assert or abort, signal).
+*/
 
 static void
 identify (const char *file)
@@ -228,7 +239,7 @@ as_bad_internal (const char *file, unsigned int line, char *buffer)
 }
 
 /* Send to stderr a string as a warning, and locate warning in input
-   file(s).  Please us when there is no recovery, but we want to
+   file(s).  Please use when there is no recovery, but we want to
    continue processing but not produce an object file.
    Please explain in string (which may have '\n's) what recovery was
    done.  */
@@ -286,38 +297,61 @@ as_fatal (const char *format, ...)
   xexit (EXIT_FAILURE);
 }
 
-/* Indicate assertion failure.
-   Arguments: Filename, line number, optional function name.  */
+/* Indicate internal constency error.
+   Arguments: Filename, line number, optional function name.
+   FILENAME may be NULL, which we use for crash-via-signal.  */
 
 void
-as_assert (const char *file, int line, const char *fn)
+as_abort (const char *file, int line, const char *fn)
 {
   as_show_where ();
-  fprintf (stderr, _("Internal error!\n"));
-  if (fn)
-    fprintf (stderr, _("Assertion failure in %s at %s:%d.\n"),
-            fn, file, line);
+
+  if (!file)
+    fprintf (stderr, _("Internal error (%s).\n"), fn ? fn : "unknown");
+  else if (fn)
+    fprintf (stderr, _("Internal error in %s at %s:%d.\n"), fn, file, line);
   else
-    fprintf (stderr, _("Assertion failure at %s:%d.\n"), file, line);
+    fprintf (stderr, _("Internal error at %s:%d.\n"), file, line);
+
   fprintf (stderr, _("Please report this bug.\n"));
+
   xexit (EXIT_FAILURE);
 }
 
-/* as_abort: Print a friendly message saying how totally hosed we are,
-   and exit without producing a core file.  */
+/* Handler for fatal signals, such as SIGSEGV. */
+
+static void
+signal_crash (int signo)
+{
+  /* Reset, to prevent unbounded recursion.  */
+  signal (signo, SIG_DFL);
+
+  as_abort (NULL, 0, strsignal (signo));
+}
+
+/* Register signal handlers, for less abrubt crashes.  */
 
 void
-as_abort (const char *file, int line, const char *fn)
+signal_init (void)
 {
-  as_show_where ();
-  if (fn)
-    fprintf (stderr, _("Internal error, aborting at %s:%d in %s\n"),
-            file, line, fn);
-  else
-    fprintf (stderr, _("Internal error, aborting at %s:%d\n"),
-            file, line);
-  fprintf (stderr, _("Please report this bug.\n"));
-  xexit (EXIT_FAILURE);
+#ifdef SIGSEGV
+  signal (SIGSEGV, signal_crash);
+#endif
+#ifdef SIGILL
+  signal (SIGILL, signal_crash);
+#endif
+#ifdef SIGBUS
+  signal (SIGBUS, signal_crash);
+#endif
+#ifdef SIGABRT
+  signal (SIGABRT, signal_crash);
+#endif
+#if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
+  signal (SIGIOT, signal_crash);
+#endif
+#ifdef SIGFPE
+  signal (SIGFPE, signal_crash);
+#endif
 }
 
 /* Support routines.  */
@@ -363,13 +397,12 @@ as_internal_value_out_of_range (const char *prefix,
        abort ();
 
       /* xgettext:c-format  */
-      err = _("%s out of domain (%d is not a multiple of %d)");
+      err = _("%s out of domain (%" BFD_VMA_FMT "d is not a multiple of %" \
+             BFD_VMA_FMT "d)");
       if (bad)
-       as_bad_where (file, line, err,
-                     prefix, (int) val, (int) right);
+       as_bad_where (file, line, err, prefix, val, right);
       else
-       as_warn_where (file, line, err,
-                      prefix, (int) val, (int) right);
+       as_warn_where (file, line, err, prefix, val, right);
       return;
     }
 
@@ -381,14 +414,13 @@ as_internal_value_out_of_range (const char *prefix,
       && max > HEX_MIN_THRESHOLD)
     {
       /* xgettext:c-format  */
-      err = _("%s out of range (%d is not between %d and %d)");
+      err = _("%s out of range (%" BFD_VMA_FMT "d is not between %" \
+             BFD_VMA_FMT "d and %" BFD_VMA_FMT "d)");
 
       if (bad)
-       as_bad_where (file, line, err,
-                     prefix, (int) val, (int) min, (int) max);
+       as_bad_where (file, line, err, prefix, val, min, max);
       else
-       as_warn_where (file, line, err,
-                      prefix, (int) val, (int) min, (int) max);
+       as_warn_where (file, line, err, prefix, val, min, max);
     }
   else
     {