freebsd-dev/sys/i386/include/setjmp.h

/*-
 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by John Birrell.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef _MACHINE_SETJMP_H_
#define	_MACHINE_SETJMP_H_

#define	_JBLEN	11		/* Size of the jmp_buf on x86. */

/*
 * jmp_buf and sigjmp_buf are encapsulated in different structs to force
 * compile-time diagnostics for mismatches.  The structs are the same
 * internally to avoid some run-time errors for mismatches.
 */
#ifndef _ANSI_SOURCE
typedef	struct _sigjmp_buf { int _sjb[_JBLEN + 1]; } sigjmp_buf[1];
#endif

typedef	struct _jmp_buf { int _jb[_JBLEN + 1]; } jmp_buf[1];

#endif /* !_MACHINE_SETJMP_H_ */
style(9) <machine/setjmp.h> headers so they look mostly the same. 2002-10-04 22:10:06 +00:00			`/*-`
Add a machine dependent header for the i386 jmp_buf size instead of piling machine dependent definitions into src/include/setjmp.h. 1998-01-10 23:04:51 +00:00			`* Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.`
			`* All rights reserved.`
			`*`
			`* Redistribution and use in source and binary forms, with or without`
			`* modification, are permitted provided that the following conditions`
			`* are met:`
			`* 1. Redistributions of source code must retain the above copyright`
			`* notice, this list of conditions and the following disclaimer.`
			`* 2. Redistributions in binary form must reproduce the above copyright`
			`* notice, this list of conditions and the following disclaimer in the`
			`* documentation and/or other materials provided with the distribution.`
			`* 3. All advertising materials mentioning features or use of this software`
			`* must display the following acknowledgement:`
			`* This product includes software developed by John Birrell.`
			`* 4. Neither the name of the author nor the names of any co-contributors`
			`* may be used to endorse or promote products derived from this software`
			`* without specific prior written permission.`
			`*`
			* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
			`* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE`
			`* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE`
			`* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE`
			`* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL`
			`* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS`
			`* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)`
			`* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT`
			`* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY`
			`* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF`
			`* SUCH DAMAGE.`
			`*`
style(9) <machine/setjmp.h> headers so they look mostly the same. 2002-10-04 22:10:06 +00:00			`* $FreeBSD$`
Add a machine dependent header for the i386 jmp_buf size instead of piling machine dependent definitions into src/include/setjmp.h. 1998-01-10 23:04:51 +00:00			`*/`

style(9) <machine/setjmp.h> headers so they look mostly the same. 2002-10-04 22:10:06 +00:00			`#ifndef _MACHINE_SETJMP_H_`
			`#define _MACHINE_SETJMP_H_`

sigset_t change (part 3 of 5) ----------------------------- By introducing a new sigframe so that the signal handler operates on the new siginfo_t and on ucontext_t instead of sigcontext, we now need two version of sendsig and sigreturn. A flag in struct proc determines whether the process expects an old sigframe or a new sigframe. The signal trampoline handles which sigreturn to call. It does this by testing for a magic cookie in the frame. The alpha uses osigreturn to implement longjmp. This means that osigreturn is not only used for compatibility with existing binaries. To handle the new sigset_t, setjmp saves it in sc_reserved (see NOTE). the struct sigframe has been moved from frame.h to sigframe.h to handle the complex header dependencies that was caused by the new sigframe. NOTE: For the i386, the size of jmp_buf has been increased to hold the new sigset_t. On the alpha this has been prevented by using sc_reserved in sigcontext. 1999-09-29 15:06:27 +00:00			`#define _JBLEN 11 /* Size of the jmp_buf on x86. */`
Suggested by: bde Move sigjmp_buf and jmp_buf structure definitions to machine/setjmp.h so that i386 can continue to use int as the basic register type and alpha can use long. Bruce was concerned about possible differing alignment. I've left the definition of _JBLEN in machine/setjmp.h even though Bruce's example used the number directly. I don't know if any other code relies on _JBLEN, so I left it to avoid potential breakage. 1998-01-20 09:09:24 +00:00
			`/*`
			`* jmp_buf and sigjmp_buf are encapsulated in different structs to force`
			`* compile-time diagnostics for mismatches. The structs are the same`
			`* internally to avoid some run-time errors for mismatches.`
			`*/`
			`#ifndef _ANSI_SOURCE`
style(9) <machine/setjmp.h> headers so they look mostly the same. 2002-10-04 22:10:06 +00:00			`typedef struct _sigjmp_buf { int _sjb[_JBLEN + 1]; } sigjmp_buf[1];`
			`#endif`

			`typedef struct _jmp_buf { int _jb[_JBLEN + 1]; } jmp_buf[1];`
Suggested by: bde Move sigjmp_buf and jmp_buf structure definitions to machine/setjmp.h so that i386 can continue to use int as the basic register type and alpha can use long. Bruce was concerned about possible differing alignment. I've left the definition of _JBLEN in machine/setjmp.h even though Bruce's example used the number directly. I don't know if any other code relies on _JBLEN, so I left it to avoid potential breakage. 1998-01-20 09:09:24 +00:00
style(9) <machine/setjmp.h> headers so they look mostly the same. 2002-10-04 22:10:06 +00:00			`#endif /* !_MACHINE_SETJMP_H_ */`