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9ba1547929
- Maintain fpu state across signals. - Save and restore FPU state properly in ucontext_t's. Reviewed by: deischen, julian Approved by: -arch
83 lines
2.7 KiB
C
83 lines
2.7 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;
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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_len; /* sizeof(mcontext_t) */
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#define _MC_FPFMT_NODEV 0 /* device not present or configured */
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#define _MC_FPFMT_387 1
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#define _MC_FPFMT_XMM 2
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int mc_fpformat;
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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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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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#ifdef _KERNEL
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struct thread;
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void get_mcontext(struct thread *td, mcontext_t *mcp);
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int set_mcontext(struct thread *td, const mcontext_t *mcp);
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#endif
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#endif /* !_MACHINE_UCONTEXT_H_ */
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