23eeeff7be
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
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/* $FreeBSD$ */
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/* From: NetBSD: signal.h,v 1.3 1997/04/06 08:47:43 cgd Exp */
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/*
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* Copyright (c) 1994, 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _ALPHA_SIGNAL_H_
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#define _ALPHA_SIGNAL_H_
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#include <sys/cdefs.h>
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#include <sys/_sigset.h>
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typedef long sig_atomic_t;
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#if __XSI_VISIBLE
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/*
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* Minimum signal stack size. The current signal frame
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* for Alpha is 808 bytes large.
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*/
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#define MINSIGSTKSZ (1024 * 4)
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#endif
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/*
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* Only the kernel should need these old type definitions.
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*/
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#if defined(_KERNEL) && defined(COMPAT_43)
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/*
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* Information pushed on stack when a signal is delivered.
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* This is used by the kernel to restore state following
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* execution of the signal handler. It is also made available
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* to the handler to allow it to restore state properly if
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* a non-standard exit is performed.
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*
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* Note that sc_regs[] and sc_fpregs[]+sc_fpcr are inline
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* representations of 'struct reg' and 'struct fpreg', respectively.
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*/
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struct osigcontext {
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long sc_onstack; /* sigstack state to restore */
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long sc_mask; /* signal mask to restore */
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long sc_pc; /* pc to restore */
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long sc_ps; /* ps to restore */
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unsigned long sc_regs[32]; /* integer register set (see above) */
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long sc_ownedfp; /* fp has been used */
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unsigned long sc_fpregs[32]; /* FP register set (see above) */
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unsigned long sc_fpcr; /* FP control register (see above) */
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unsigned long sc_fp_control; /* FP software control word */
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long sc_reserved[2]; /* XXX */
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long sc_xxx1[2]; /* sc_ssize, sc_sbase on DUX */
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unsigned long sc_traparg_a0; /* a0 argument to trap at exception */
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unsigned long sc_traparg_a1; /* a1 argument to trap at exception */
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unsigned long sc_traparg_a2; /* a2 argument to trap at exception */
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long sc_xxx2[3]; /* sc_fp_trap_pc, sc_fp_trigger_sum, sc_fp_trigger_inst */
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};
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#endif /* _KERNEL */
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#if __BSD_VISIBLE
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/*
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* The sequence of the fields should match those in
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* mcontext_t. Keep them in sync!
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*/
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struct sigcontext {
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struct __sigset sc_mask; /* signal mask to restore */
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long sc_onstack; /* sigstack state to restore */
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unsigned long sc_regs[32]; /* integer register set (see above) */
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long sc_ps; /* ps to restore */
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long sc_pc; /* pc to restore */
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unsigned long sc_traparg_a0; /* a0 argument to trap at exception */
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unsigned long sc_traparg_a1; /* a1 argument to trap at exception */
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unsigned long sc_traparg_a2; /* a2 argument to trap at exception */
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unsigned long sc_fpregs[32]; /* FP register set (see above) */
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unsigned long sc_fpcr; /* FP control register (see above) */
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unsigned long sc_fp_control; /* FP software control word */
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long sc_ownedfp; /* fp has been used */
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long sc_xxx1[2]; /* sc_ssize, sc_sbase on DUX */
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long sc_xxx2[3]; /* sc_fp_trap_pc, sc_fp_trigger_sum, sc_fp_trigger_inst */
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long sc_reserved[2]; /* XXX */
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};
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#define sc_sp sc_regs[R_SP]
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#endif /* __BSD_VISIBLE */
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#endif /* !_ALPHA_SIGNAL_H_*/
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