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authorThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
committerThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
commitf07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch)
tree12b07c7e578fc1a5f53dbfde2632408491ff2a70 /i386/include/mach/setjmp.h
Initial source
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diff --git a/i386/include/mach/setjmp.h b/i386/include/mach/setjmp.h
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+/*
+ * Mach Operating System
+ * Copyright (c) 1993 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * Setjmp/longjmp buffer for i386.
+ */
+#ifndef _MACH_SETJMP_H_PROCESSED_
+#define _MACH_SETJMP_H_PROCESSED_ 1
+
+/* XXX prefix these with mach_ so they don't interfere with higher layers?
+ This stuff is included by cthreads.h. */
+
+/* XXX The original definition of jmp_buf[] causes problems using
+ * libthreads when linked against NetBSD and FreeBSD's libc because
+ * it's too small. When cthreads calls _setjmp, it gets the libc
+ * version which saves more state than it's expecting and overwrites
+ * important cthread data. =( This definition is big enough for all
+ * known systems so far (Linux's is 6, FreeBSD's is 9 and NetBSD's is
+ * 10). This file really shouldn't even be here, since we should be
+ * using libc's setjmp.h.
+ */
+#if 0
+#define _JBLEN 6
+#else
+#define _JBLEN 10
+#endif
+
+typedef int jmp_buf[_JBLEN]; /* ebx, esi, edi, ebp, esp, eip */
+
+
+extern int setjmp (jmp_buf);
+extern void longjmp (jmp_buf, int);
+extern int _setjmp (jmp_buf);
+extern void _longjmp (jmp_buf, int);
+
+#endif /* _MACH_SETJMP_H_PROCESSED_ */