128 lines
4.5 KiB
C
128 lines
4.5 KiB
C
/* $NetBSD: signal.h,v 1.9 2003/10/18 18:34:10 christos 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/featuretest.h>
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typedef long sig_atomic_t;
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#define __HAVE_SIGINFO
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#ifdef COMPAT_16
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#define SIGTRAMP_VALID(vers) ((unsigned)(vers) <= 2)
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#else
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#define SIGTRAMP_VALID(vers) ((vers) == 2)
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#endif
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#if defined(_NETBSD_SOURCE)
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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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#if defined(__LIBC12_SOURCE__) || defined(_KERNEL)
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struct sigcontext13 {
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long sc_onstack; /* sigstack state to restore */
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long sc_mask; /* signal mask to restore (old style) */
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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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#define sc_sp sc_regs[R_SP]
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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_xxx[8]; /* XXX */
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};
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#endif /* __LIBC12_SOURCE__ || _KERNEL */
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struct sigcontext {
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long sc_onstack; /* sigstack state to restore */
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long __sc_mask13; /* signal mask to restore (old style) */
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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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#define sc_sp sc_regs[R_SP]
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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_xxx[8]; /* XXX */
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sigset_t sc_mask; /* signal mask to restore (new style) */
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};
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/*
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* The following macros are used to convert from a ucontext to sigcontext,
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* and vice-versa. This is for building a sigcontext to deliver to old-style
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* signal handlers, and converting back (in the event the handler modifies
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* the context).
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*/
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#define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \
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do { \
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(sc)->sc_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \
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(sc)->sc_ps = (uc)->uc_mcontext.__gregs[_REG_PS]; \
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memcpy(&(sc)->sc_regs, &(uc)->uc_mcontext.__gregs, \
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31 * sizeof(unsigned long)); \
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if ((uc)->uc_flags & _UC_FPU) { \
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(sc)->sc_ownedfp = 1; \
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memcpy(&(sc)->sc_fpregs, \
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&(uc)->uc_mcontext.__fpregs.__fp_fr, \
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31 * sizeof(unsigned long)); \
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(sc)->sc_fpcr = (uc)->uc_mcontext.__fpregs.__fp_fpcr; \
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/* XXX sc_fp_control */ \
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} else \
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(sc)->sc_ownedfp = 0; \
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} while (/*CONSTCOND*/0)
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#define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \
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do { \
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(uc)->uc_mcontext.__gregs[_REG_PC] = (sc)->sc_pc; \
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(uc)->uc_mcontext.__gregs[_REG_PS] = (sc)->sc_ps; \
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memcpy(&(uc)->uc_mcontext.__gregs, &(sc)->sc_regs, \
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31 * sizeof(unsigned long)); \
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if ((sc)->sc_ownedfp) { \
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memcpy(&(uc)->uc_mcontext.__fpregs.__fp_fr, \
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&(sc)->sc_fpregs, 31 * sizeof(unsigned long)); \
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(sc)->sc_fpcr = (uc)->uc_mcontext.__fpregs.__fp_fpcr; \
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/* XXX sc_fp_control */ \
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(uc)->uc_flags |= _UC_FPU; \
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} \
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} while (/*CONSTCOND*/0)
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#endif /* _NETBSD_SOURCE */
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#endif /* !_ALPHA_SIGNAL_H_*/
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