4be7a2dcf3
by the application, all NetBSD interfaces are made visible, even if some other feature-test macro (like _POSIX_C_SOURCE) is defined. <sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE, _POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve existing behaviour. This has two major advantages: + Programs that require non-POSIX facilities but define _POSIX_C_SOURCE can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS. + It makes most of the #ifs simpler, in that they're all now ORs of the various macros, rather than having checks for (!defined(_ANSI_SOURCE) || !defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place. I've tried not to change the semantics of the headers in any case where _NETBSD_SOURCE wasn't defined, but there were some places where the current semantics were clearly mad, and retaining them was harder than correcting them. In particular, I've mostly normalised things so that _ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE, _XOPEN_SOURCE and _NETBSD_SOURCE in that order. Tested by building for vax, encouraged by thorpej, and uncontested in tech-userlevel for a week.
157 lines
5.8 KiB
C
157 lines
5.8 KiB
C
/* $NetBSD: signal.h,v 1.19 2003/04/28 23:16:21 bjh21 Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)signal.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _MIPS_SIGNAL_H_
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#define _MIPS_SIGNAL_H_
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#include <sys/featuretest.h>
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#include <machine/cdefs.h> /* for API selection */
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#if !defined(__ASSEMBLER__)
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/*
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* Machine-dependent signal definitions
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*/
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typedef int sig_atomic_t;
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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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* sizeof(sigcontext) = 45 * sizeof(int) + 35 * sizeof(mips_reg_t)
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*/
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#if defined(__LIBC12_SOURCE__) || defined(_KERNEL)
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struct sigcontext13 {
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int sc_onstack; /* sigstack state to restore */
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int sc_mask; /* signal mask to restore (old style) */
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mips_reg_t sc_pc; /* pc at time of signal */
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mips_reg_t sc_regs[32]; /* processor regs 0 to 31 */
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mips_reg_t mullo, mulhi;/* mullo and mulhi registers... */
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int sc_fpused; /* fp has been used */
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int sc_fpregs[33]; /* fp regs 0 to 31 and csr */
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int sc_fpc_eir; /* floating point exception instruction reg */
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int sc_xxx[8]; /* XXX reserved */
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};
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#endif /* __LIBC12_SOURCE__ || _KERNEL */
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struct sigcontext {
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int sc_onstack; /* sigstack state to restore */
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int __sc_mask13; /* signal mask to restore (old style) */
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mips_reg_t sc_pc; /* pc at time of signal */
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mips_reg_t sc_regs[32]; /* processor regs 0 to 31 */
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mips_reg_t mullo, mulhi;/* mullo and mulhi registers... */
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int sc_fpused; /* fp has been used */
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int sc_fpregs[33]; /* fp regs 0 to 31 and csr */
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int sc_fpc_eir; /* floating point exception instruction reg */
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int sc_xxx[8]; /* XXX reserved */
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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_EPC]; \
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memcpy((sc)->sc_regs, (uc)->uc_mcontext.__gregs, \
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sizeof((sc)->sc_regs)); \
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(sc)->mullo = (uc)->uc_mcontext.__gregs[_REG_MDLO]; \
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(sc)->mulhi = (uc)->uc_mcontext.__gregs[_REG_MDHI]; \
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\
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if ((uc)->uc_flags & _UC_FPU) { \
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memcpy(&(sc)->sc_fpregs, \
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&(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, \
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sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32)); \
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(sc)->sc_fpregs[32] = \
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(uc)->uc_mcontext.__fpregs.__fp_csr; \
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(sc)->sc_fpc_eir = 0; /* XXX */ \
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(sc)->sc_fpused = 1; \
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} else \
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(sc)->sc_fpused = 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_EPC] = (sc)->sc_pc; \
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memcpy((uc)->uc_mcontext.__gregs, (sc)->sc_regs, \
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sizeof((sc)->sc_regs)); \
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(uc)->uc_mcontext.__gregs[_REG_MDLO] = (sc)->mullo; \
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(uc)->uc_mcontext.__gregs[_REG_MDHI] = (sc)->mulhi; \
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\
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if ((sc)->sc_fpused) { \
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memcpy(&(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, \
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&(sc)->sc_fpregs, \
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sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32)); \
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(uc)->uc_mcontext.__fpregs.__fp_csr = \
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(sc)->sc_fpregs[32]; \
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(uc)->uc_flags |= _UC_FPU; \
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} else \
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(uc)->uc_flags &= ~_UC_FPU; \
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} while (/*CONSTCOND*/0)
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#endif /* _NETBSD_SOURCE */
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#endif /* !_LANGUAGE_ASSEMBLY */
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#if !defined(_KERNEL)
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/*
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* Hard code these to make people think twice about breaking compatibility.
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* These macros are generated independently for the kernel.
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*/
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#if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
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#define _OFFSETOF_SC_REGS 12
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#define _OFFSETOF_SC_FPREGS 152
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#define _OFFSETOF_SC_MASK 320
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#else
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#define _OFFSETOF_SC_REGS 16
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#define _OFFSETOF_SC_FPREGS 292
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#define _OFFSETOF_SC_MASK 460
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#endif
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#endif /* !_KERNEL */
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#endif /* !_MIPS_SIGNAL_H_ */
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