2be05b70c9
Previously these were libc functions but were requested to be made into system calls for atomicity and to coalesce what might be two entrances into the kernel (signal mask setting and floating point trap) into one. A few style nits and comments from bde are also included. Tested on alpha by: gallatin
69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/*-
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* Copyright (c) 1999 Marcel Moolenaar
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* All rights reserved.
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_UCONTEXT_H_
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#define _MACHINE_UCONTEXT_H_
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typedef struct __mcontext {
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/*
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* These fields must match the definition
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* of struct sigcontext. That way we can support
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* struct sigcontext and ucontext_t at the same
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* time.
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*/
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long mc_onstack; /* XXX - sigcontext compat. */
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unsigned long mc_regs[37];
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unsigned long mc_fpregs[32];
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unsigned long mc_fpcr;
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unsigned long mc_fp_control;
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#define _MC_FPOWNED_NONE 0 /* FP state not used */
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#define _MC_FPOWNED_FPU 1 /* FP state came from FPU */
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#define _MC_FPOWNED_PCB 2 /* FP state came from PCB */
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long mc_ownedfp;
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#define _MC_REV0_SIGFRAME 1 /* context is a signal frame */
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#define _MC_REV0_TRAPFRAME 2 /* context is a trap frame */
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long mc_format;
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long mc_spare[6];
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} mcontext_t;
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#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
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struct mcontext4 {
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long mc_onstack; /* XXX - sigcontext compat. */
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unsigned long mc_regs[37];
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unsigned long mc_fpregs[32];
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unsigned long mc_fpcr;
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unsigned long mc_fp_control;
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long mc_ownedfp;
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long __spare__[7];
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};
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#endif
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#endif /* !_MACHINE_UCONTEXT_H_ */
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