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authorRoland McGrath <roland@hack.frob.com>2014-07-31 13:07:19 -0700
committerRoland McGrath <roland@hack.frob.com>2014-07-31 13:07:19 -0700
commit9fe7e787adc4f41201c441014fbad318eaae6f80 (patch)
tree0bad49b124ab865c1bdfa62a7704de1ee3abcfec /sysdeps/generic
parent23fe486bebc9ce58405853eb70cd87352156c91d (diff)
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Use __builtin_trap for ABORT_INSTRUCTION.
Diffstat (limited to 'sysdeps/generic')
-rw-r--r--sysdeps/generic/abort-instr.h31
1 files changed, 30 insertions, 1 deletions
diff --git a/sysdeps/generic/abort-instr.h b/sysdeps/generic/abort-instr.h
index 106a330b2b..4ac11d2ea5 100644
--- a/sysdeps/generic/abort-instr.h
+++ b/sysdeps/generic/abort-instr.h
@@ -1,2 +1,31 @@
+/* Magic instruction to crash quickly and reliably. Generic/stub version.
+ Copyright (C) 2014 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _ABORT_INSTR_H
+#define _ABORT_INSTR_H 1
+
+/* If the compiler provides the generic way to generate the right
+ instruction, we can use that without any machine-specific knowledge. */
+#if HAVE_BUILTIN_TRAP
+# define ABORT_INSTRUCTION __builtin_trap ()
+#else
/* We cannot give any generic instruction to crash the program.
- abort() will have to make sure it never returns. */
+ abort will have to make sure it never returns. */
+#endif
+
+#endif /* abort-instr.h */