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
104 lines
3.1 KiB
C
104 lines
3.1 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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* The first 20 fields must match the definition of
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* sigcontext. So that we can support sigcontext
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* and ucontext_t at the same time.
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*/
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int mc_onstack; /* XXX - sigcontext compat. */
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int mc_gs; /* machine state (trapframe) */
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int mc_fs;
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int mc_es;
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int mc_ds;
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int mc_edi;
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int mc_esi;
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int mc_ebp;
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int mc_isp;
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int mc_ebx;
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int mc_edx;
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int mc_ecx;
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int mc_eax;
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int mc_trapno;
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int mc_err;
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int mc_eip;
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int mc_cs;
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int mc_eflags;
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int mc_esp;
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int mc_ss;
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int mc_len; /* sizeof(mcontext_t) */
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#define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
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#define _MC_FPFMT_387 0x10001
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#define _MC_FPFMT_XMM 0x10002
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int mc_fpformat;
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#define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
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#define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
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#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
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int mc_ownedfp;
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int mc_spare1[1]; /* align next field to 16 bytes */
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int mc_fpstate[128]; /* must be multiple of 16 bytes */
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int mc_spare2[8];
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} mcontext_t;
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#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
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/* For 4.x binaries */
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struct mcontext4 {
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int mc_onstack; /* XXX - sigcontext compat. */
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int mc_gs;
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int mc_fs;
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int mc_es;
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int mc_ds;
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int mc_edi;
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int mc_esi;
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int mc_ebp;
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int mc_isp;
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int mc_ebx;
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int mc_edx;
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int mc_ecx;
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int mc_eax;
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int mc_trapno;
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int mc_err;
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int mc_eip;
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int mc_cs;
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int mc_eflags;
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int mc_esp; /* machine state */
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int mc_ss;
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int mc_fpregs[28]; /* env87 + fpacc87 + u_long */
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int __spare__[17];
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};
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#endif
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#endif /* !_MACHINE_UCONTEXT_H_ */
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