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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-17 21:05:42 -0400
committerH. Peter Anvin <hpa@zytor.com>2008-10-23 01:55:20 -0400
commitbb8985586b7a906e116db835c64773b7a7d51663 (patch)
treede93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/sigcontext.h
parent8ede0bdb63305d3353efd97e9af6210afb05734e (diff)
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/sigcontext.h')
-rw-r--r--arch/x86/include/asm/sigcontext.h284
1 files changed, 284 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sigcontext.h b/arch/x86/include/asm/sigcontext.h
new file mode 100644
index 000000000000..ee813f4fe5d5
--- /dev/null
+++ b/arch/x86/include/asm/sigcontext.h
@@ -0,0 +1,284 @@
1#ifndef ASM_X86__SIGCONTEXT_H
2#define ASM_X86__SIGCONTEXT_H
3
4#include <linux/compiler.h>
5#include <asm/types.h>
6
7#define FP_XSTATE_MAGIC1 0x46505853U
8#define FP_XSTATE_MAGIC2 0x46505845U
9#define FP_XSTATE_MAGIC2_SIZE sizeof(FP_XSTATE_MAGIC2)
10
11/*
12 * bytes 464..511 in the current 512byte layout of fxsave/fxrstor frame
13 * are reserved for SW usage. On cpu's supporting xsave/xrstor, these bytes
14 * are used to extended the fpstate pointer in the sigcontext, which now
15 * includes the extended state information along with fpstate information.
16 *
17 * Presence of FP_XSTATE_MAGIC1 at the beginning of this SW reserved
18 * area and FP_XSTATE_MAGIC2 at the end of memory layout
19 * (extended_size - FP_XSTATE_MAGIC2_SIZE) indicates the presence of the
20 * extended state information in the memory layout pointed by the fpstate
21 * pointer in sigcontext.
22 */
23struct _fpx_sw_bytes {
24 __u32 magic1; /* FP_XSTATE_MAGIC1 */
25 __u32 extended_size; /* total size of the layout referred by
26 * fpstate pointer in the sigcontext.
27 */
28 __u64 xstate_bv;
29 /* feature bit mask (including fp/sse/extended
30 * state) that is present in the memory
31 * layout.
32 */
33 __u32 xstate_size; /* actual xsave state size, based on the
34 * features saved in the layout.
35 * 'extended_size' will be greater than
36 * 'xstate_size'.
37 */
38 __u32 padding[7]; /* for future use. */
39};
40
41#ifdef __i386__
42/*
43 * As documented in the iBCS2 standard..
44 *
45 * The first part of "struct _fpstate" is just the normal i387
46 * hardware setup, the extra "status" word is used to save the
47 * coprocessor status word before entering the handler.
48 *
49 * Pentium III FXSR, SSE support
50 * Gareth Hughes <gareth@valinux.com>, May 2000
51 *
52 * The FPU state data structure has had to grow to accommodate the
53 * extended FPU state required by the Streaming SIMD Extensions.
54 * There is no documented standard to accomplish this at the moment.
55 */
56struct _fpreg {
57 unsigned short significand[4];
58 unsigned short exponent;
59};
60
61struct _fpxreg {
62 unsigned short significand[4];
63 unsigned short exponent;
64 unsigned short padding[3];
65};
66
67struct _xmmreg {
68 unsigned long element[4];
69};
70
71struct _fpstate {
72 /* Regular FPU environment */
73 unsigned long cw;
74 unsigned long sw;
75 unsigned long tag;
76 unsigned long ipoff;
77 unsigned long cssel;
78 unsigned long dataoff;
79 unsigned long datasel;
80 struct _fpreg _st[8];
81 unsigned short status;
82 unsigned short magic; /* 0xffff = regular FPU data only */
83
84 /* FXSR FPU environment */
85 unsigned long _fxsr_env[6]; /* FXSR FPU env is ignored */
86 unsigned long mxcsr;
87 unsigned long reserved;
88 struct _fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
89 struct _xmmreg _xmm[8];
90 unsigned long padding1[44];
91
92 union {
93 unsigned long padding2[12];
94 struct _fpx_sw_bytes sw_reserved; /* represents the extended
95 * state info */
96 };
97};
98
99#define X86_FXSR_MAGIC 0x0000
100
101#ifdef __KERNEL__
102struct sigcontext {
103 unsigned short gs, __gsh;
104 unsigned short fs, __fsh;
105 unsigned short es, __esh;
106 unsigned short ds, __dsh;
107 unsigned long di;
108 unsigned long si;
109 unsigned long bp;
110 unsigned long sp;
111 unsigned long bx;
112 unsigned long dx;
113 unsigned long cx;
114 unsigned long ax;
115 unsigned long trapno;
116 unsigned long err;
117 unsigned long ip;
118 unsigned short cs, __csh;
119 unsigned long flags;
120 unsigned long sp_at_signal;
121 unsigned short ss, __ssh;
122
123 /*
124 * fpstate is really (struct _fpstate *) or (struct _xstate *)
125 * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
126 * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
127 * of extended memory layout. See comments at the defintion of
128 * (struct _fpx_sw_bytes)
129 */
130 void __user *fpstate; /* zero when no FPU/extended context */
131 unsigned long oldmask;
132 unsigned long cr2;
133};
134#else /* __KERNEL__ */
135/*
136 * User-space might still rely on the old definition:
137 */
138struct sigcontext {
139 unsigned short gs, __gsh;
140 unsigned short fs, __fsh;
141 unsigned short es, __esh;
142 unsigned short ds, __dsh;
143 unsigned long edi;
144 unsigned long esi;
145 unsigned long ebp;
146 unsigned long esp;
147 unsigned long ebx;
148 unsigned long edx;
149 unsigned long ecx;
150 unsigned long eax;
151 unsigned long trapno;
152 unsigned long err;
153 unsigned long eip;
154 unsigned short cs, __csh;
155 unsigned long eflags;
156 unsigned long esp_at_signal;
157 unsigned short ss, __ssh;
158 struct _fpstate __user *fpstate;
159 unsigned long oldmask;
160 unsigned long cr2;
161};
162#endif /* !__KERNEL__ */
163
164#else /* __i386__ */
165
166/* FXSAVE frame */
167/* Note: reserved1/2 may someday contain valuable data. Always save/restore
168 them when you change signal frames. */
169struct _fpstate {
170 __u16 cwd;
171 __u16 swd;
172 __u16 twd; /* Note this is not the same as the
173 32bit/x87/FSAVE twd */
174 __u16 fop;
175 __u64 rip;
176 __u64 rdp;
177 __u32 mxcsr;
178 __u32 mxcsr_mask;
179 __u32 st_space[32]; /* 8*16 bytes for each FP-reg */
180 __u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg */
181 __u32 reserved2[12];
182 union {
183 __u32 reserved3[12];
184 struct _fpx_sw_bytes sw_reserved; /* represents the extended
185 * state information */
186 };
187};
188
189#ifdef __KERNEL__
190struct sigcontext {
191 unsigned long r8;
192 unsigned long r9;
193 unsigned long r10;
194 unsigned long r11;
195 unsigned long r12;
196 unsigned long r13;
197 unsigned long r14;
198 unsigned long r15;
199 unsigned long di;
200 unsigned long si;
201 unsigned long bp;
202 unsigned long bx;
203 unsigned long dx;
204 unsigned long ax;
205 unsigned long cx;
206 unsigned long sp;
207 unsigned long ip;
208 unsigned long flags;
209 unsigned short cs;
210 unsigned short gs;
211 unsigned short fs;
212 unsigned short __pad0;
213 unsigned long err;
214 unsigned long trapno;
215 unsigned long oldmask;
216 unsigned long cr2;
217
218 /*
219 * fpstate is really (struct _fpstate *) or (struct _xstate *)
220 * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
221 * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
222 * of extended memory layout. See comments at the defintion of
223 * (struct _fpx_sw_bytes)
224 */
225 void __user *fpstate; /* zero when no FPU/extended context */
226 unsigned long reserved1[8];
227};
228#else /* __KERNEL__ */
229/*
230 * User-space might still rely on the old definition:
231 */
232struct sigcontext {
233 unsigned long r8;
234 unsigned long r9;
235 unsigned long r10;
236 unsigned long r11;
237 unsigned long r12;
238 unsigned long r13;
239 unsigned long r14;
240 unsigned long r15;
241 unsigned long rdi;
242 unsigned long rsi;
243 unsigned long rbp;
244 unsigned long rbx;
245 unsigned long rdx;
246 unsigned long rax;
247 unsigned long rcx;
248 unsigned long rsp;
249 unsigned long rip;
250 unsigned long eflags; /* RFLAGS */
251 unsigned short cs;
252 unsigned short gs;
253 unsigned short fs;
254 unsigned short __pad0;
255 unsigned long err;
256 unsigned long trapno;
257 unsigned long oldmask;
258 unsigned long cr2;
259 struct _fpstate __user *fpstate; /* zero when no FPU context */
260 unsigned long reserved1[8];
261};
262#endif /* !__KERNEL__ */
263
264#endif /* !__i386__ */
265
266struct _xsave_hdr {
267 __u64 xstate_bv;
268 __u64 reserved1[2];
269 __u64 reserved2[5];
270};
271
272/*
273 * Extended state pointed by the fpstate pointer in the sigcontext.
274 * In addition to the fpstate, information encoded in the xstate_hdr
275 * indicates the presence of other extended state information
276 * supported by the processor and OS.
277 */
278struct _xstate {
279 struct _fpstate fpstate;
280 struct _xsave_hdr xstate_hdr;
281 /* new processor state extensions go here */
282};
283
284#endif /* ASM_X86__SIGCONTEXT_H */
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