2 * Copyright (c) 1999 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _MACHINE_UCONTEXT_H_
32 #define _MACHINE_UCONTEXT_H_
34 /* Keep _MC_* values similar to amd64 */
35 #define _MC_HASSEGS 0x1
36 #define _MC_HASBASES 0x2
37 #define _MC_HASFPXSTATE 0x4
38 #define _MC_FLAG_MASK (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
40 typedef struct __mcontext {
42 * The definition of mcontext_t must match the layout of
43 * struct sigcontext after the sc_mask member. This is so
44 * that we can support sigcontext and ucontext_t at the same
47 __register_t mc_onstack; /* XXX - sigcontext compat. */
48 __register_t mc_gs; /* machine state (struct trapframe) */
60 __register_t mc_trapno;
64 __register_t mc_eflags;
68 int mc_len; /* sizeof(mcontext_t) */
69 #define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
70 #define _MC_FPFMT_387 0x10001
71 #define _MC_FPFMT_XMM 0x10002
73 #define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
74 #define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
75 #define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
77 __register_t mc_flags;
79 * See <machine/npx.h> for the internals of mc_fpstate[].
81 int mc_fpstate[128] __aligned(16);
83 __register_t mc_fsbase;
84 __register_t mc_gsbase;
86 __register_t mc_xfpustate;
87 __register_t mc_xfpustate_len;
92 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
94 __register_t mc_onstack; /* XXX - sigcontext compat. */
95 __register_t mc_gs; /* machine state (struct trapframe) */
107 __register_t mc_trapno;
111 __register_t mc_eflags;
112 __register_t mc_esp; /* machine state */
114 __register_t mc_fpregs[28]; /* env87 + fpacc87 + u_long */
115 __register_t __spare__[17];
119 #endif /* !_MACHINE_UCONTEXT_H_ */