freebsd-dev/sys/i386/include/signal.h
Peter Wemm 23eeeff7be Split 4.x and 5.x signal handling so that we can keep 4.x signal
handling clean and functional as 5.x evolves.  This allows some of the
nasty bandaids in the 5.x codepaths to be unwound.

Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an
anti-foot-shooting measure in place, 5.x folks need this for a while) and
finish encapsulating the older stuff under COMPAT_43.  Since the ancient
stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *'
to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn
is supposed to take), add a compile time check to prevent foot shooting
there too.  Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc.

Tested on: i386, alpha, ia64.  Compiled on sparc64 (a few days ago).
Approved by: re
2002-10-25 19:10:58 +00:00

143 lines
3.9 KiB
C

/*
* Copyright (c) 1986, 1989, 1991, 1993
* The Regents of the University of California. 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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.
*
* @(#)signal.h 8.1 (Berkeley) 6/11/93
* $FreeBSD$
*/
#ifndef _MACHINE_SIGNAL_H_
#define _MACHINE_SIGNAL_H_
#include <sys/cdefs.h>
#include <sys/_sigset.h>
/*
* Machine-dependent signal definitions
*/
typedef int sig_atomic_t;
#if __XSI_VISIBLE
/*
* Minimum signal stack size. The current signal frame
* for i386 is 408 bytes large.
*/
#define MINSIGSTKSZ (512 * 4)
#endif
#if __BSD_VISIBLE
#include <machine/trap.h> /* codes for SIGILL, SIGFPE */
/*
* Only the kernel should need these old type definitions.
*/
#if defined(_KERNEL) && defined(COMPAT_43)
/*
* Information pushed on stack when a signal is delivered.
* This is used by the kernel to restore state following
* execution of the signal handler. It is also made available
* to the handler to allow it to restore state properly if
* a non-standard exit is performed.
*/
struct osigcontext {
int sc_onstack; /* sigstack state to restore */
osigset_t sc_mask; /* signal mask to restore */
int sc_esp; /* machine state follows: */
int sc_ebp;
int sc_isp;
int sc_eip;
int sc_efl;
int sc_es;
int sc_ds;
int sc_cs;
int sc_ss;
int sc_edi;
int sc_esi;
int sc_ebx;
int sc_edx;
int sc_ecx;
int sc_eax;
int sc_gs;
int sc_fs;
int sc_trapno;
int sc_err;
};
#endif
/*
* The sequence of the fields/registers in struct sigcontext should match
* those in mcontext_t.
*/
struct sigcontext {
struct __sigset sc_mask; /* signal mask to restore */
int sc_onstack; /* sigstack state to restore */
int sc_gs; /* machine state (struct trapframe): */
int sc_fs;
int sc_es;
int sc_ds;
int sc_edi;
int sc_esi;
int sc_ebp;
int sc_isp;
int sc_ebx;
int sc_edx;
int sc_ecx;
int sc_eax;
int sc_trapno;
int sc_err;
int sc_eip;
int sc_cs;
int sc_efl;
int sc_esp;
int sc_ss;
int sc_len; /* sizeof(struct mcontext_t) */
/*
* XXX - See <machine/ucontext.h> and <machine/npx.h> for
* the following fields.
*/
int sc_fpformat;
int sc_ownedfp;
int sc_spare1[1];
int sc_fpregs[128];
int sc_spare2[8];
};
#define sc_sp sc_esp
#define sc_fp sc_ebp
#define sc_pc sc_eip
#define sc_ps sc_efl
#define sc_eflags sc_efl
#endif /* __BSD_VISIBLE */
#endif /* !_MACHINE_SIGNAL_H_ */