2 * Copyright (c) 2003 Peter Wemm
3 * Copyright (c) 1999 Marcel Moolenaar
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #ifndef _MACHINE_UCONTEXT_H_
33 #define _MACHINE_UCONTEXT_H_
36 * mc_trapno bits. Shall be in sync with TF_XXX.
38 #define _MC_HASSEGS 0x1
39 #define _MC_HASBASES 0x2
40 #define _MC_HASFPXSTATE 0x4
41 #define _MC_FLAG_MASK (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
43 typedef struct __mcontext {
45 * The definition of mcontext_t must match the layout of
46 * struct sigcontext after the sc_mask member. This is so
47 * that we can support sigcontext and ucontext_t at the same
50 __register_t mc_onstack; /* XXX - sigcontext compat. */
51 __register_t mc_rdi; /* machine state (struct trapframe) */
76 __register_t mc_rflags;
80 long mc_len; /* sizeof(mcontext_t) */
82 #define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
83 #define _MC_FPFMT_XMM 0x10002
85 #define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
86 #define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
87 #define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
90 * See <machine/fpu.h> for the internals of mc_fpstate[].
92 long mc_fpstate[64] __aligned(16);
94 __register_t mc_fsbase;
95 __register_t mc_gsbase;
97 __register_t mc_xfpustate;
98 __register_t mc_xfpustate_len;
103 #endif /* !_MACHINE_UCONTEXT_H_ */