2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2003 Peter Wemm
5 * Copyright (c) 1999 Marcel Moolenaar
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer
13 * in this position and unchanged.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #ifndef _X86_UCONTEXT_H_
35 #define _X86_UCONTEXT_H_
38 /* Keep _MC_* values similar to amd64 */
39 #define _MC_HASSEGS 0x1
40 #define _MC_HASBASES 0x2
41 #define _MC_HASFPXSTATE 0x4
42 #define _MC_FLAG_MASK (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
44 typedef struct __mcontext {
46 * The definition of mcontext_t must match the layout of
47 * struct sigcontext after the sc_mask member. This is so
48 * that we can support sigcontext and ucontext_t at the same
51 __register_t mc_onstack; /* XXX - sigcontext compat. */
52 __register_t mc_gs; /* machine state (struct trapframe) */
64 __register_t mc_trapno;
68 __register_t mc_eflags;
72 int mc_len; /* sizeof(mcontext_t) */
73 #define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
74 #define _MC_FPFMT_387 0x10001
75 #define _MC_FPFMT_XMM 0x10002
77 #define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
78 #define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
79 #define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
81 __register_t mc_flags;
83 * See <machine/npx.h> for the internals of mc_fpstate[].
85 int mc_fpstate[128] __aligned(16);
87 __register_t mc_fsbase;
88 __register_t mc_gsbase;
90 __register_t mc_xfpustate;
91 __register_t mc_xfpustate_len;
99 * mc_flags bits. Shall be in sync with TF_XXX.
101 #define _MC_HASSEGS 0x1
102 #define _MC_HASBASES 0x2
103 #define _MC_HASFPXSTATE 0x4
104 #define _MC_FLAG_MASK (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
106 typedef struct __mcontext {
108 * The definition of mcontext_t must match the layout of
109 * struct sigcontext after the sc_mask member. This is so
110 * that we can support sigcontext and ucontext_t at the same
113 __register_t mc_onstack; /* XXX - sigcontext compat. */
114 __register_t mc_rdi; /* machine state (struct trapframe) */
129 __uint32_t mc_trapno;
132 __register_t mc_addr;
139 __register_t mc_rflags;
143 long mc_len; /* sizeof(mcontext_t) */
145 #define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
146 #define _MC_FPFMT_XMM 0x10002
148 #define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
149 #define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
150 #define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
153 * See <machine/fpu.h> for the internals of mc_fpstate[].
155 long mc_fpstate[64] __aligned(16);
157 __register_t mc_fsbase;
158 __register_t mc_gsbase;
160 __register_t mc_xfpustate;
161 __register_t mc_xfpustate_len;
165 #endif /* __amd64__ */
167 #endif /* !_X86_UCONTEXT_H_ */