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1 | #ifndef _UAPI_ASM_X86_SIGCONTEXT_H | |
2 | #define _UAPI_ASM_X86_SIGCONTEXT_H | |
3 | ||
4 | #include <linux/compiler.h> | |
5 | #include <linux/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 | */ | |
23 | struct _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 xfeatures; | |
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 | */ | |
56 | struct _fpreg { | |
57 | unsigned short significand[4]; | |
58 | unsigned short exponent; | |
59 | }; | |
60 | ||
61 | struct _fpxreg { | |
62 | unsigned short significand[4]; | |
63 | unsigned short exponent; | |
64 | unsigned short padding[3]; | |
65 | }; | |
66 | ||
67 | struct _xmmreg { | |
68 | unsigned long element[4]; | |
69 | }; | |
70 | ||
71 | struct _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 | #ifndef __KERNEL__ | |
102 | /* | |
103 | * User-space might still rely on the old definition: | |
104 | */ | |
105 | struct sigcontext { | |
106 | unsigned short gs, __gsh; | |
107 | unsigned short fs, __fsh; | |
108 | unsigned short es, __esh; | |
109 | unsigned short ds, __dsh; | |
110 | unsigned long edi; | |
111 | unsigned long esi; | |
112 | unsigned long ebp; | |
113 | unsigned long esp; | |
114 | unsigned long ebx; | |
115 | unsigned long edx; | |
116 | unsigned long ecx; | |
117 | unsigned long eax; | |
118 | unsigned long trapno; | |
119 | unsigned long err; | |
120 | unsigned long eip; | |
121 | unsigned short cs, __csh; | |
122 | unsigned long eflags; | |
123 | unsigned long esp_at_signal; | |
124 | unsigned short ss, __ssh; | |
125 | struct _fpstate __user *fpstate; | |
126 | unsigned long oldmask; | |
127 | unsigned long cr2; | |
128 | }; | |
129 | #endif /* !__KERNEL__ */ | |
130 | ||
131 | #else /* __i386__ */ | |
132 | ||
133 | /* FXSAVE frame */ | |
134 | /* Note: reserved1/2 may someday contain valuable data. Always save/restore | |
135 | them when you change signal frames. */ | |
136 | struct _fpstate { | |
137 | __u16 cwd; | |
138 | __u16 swd; | |
139 | __u16 twd; /* Note this is not the same as the | |
140 | 32bit/x87/FSAVE twd */ | |
141 | __u16 fop; | |
142 | __u64 rip; | |
143 | __u64 rdp; | |
144 | __u32 mxcsr; | |
145 | __u32 mxcsr_mask; | |
146 | __u32 st_space[32]; /* 8*16 bytes for each FP-reg */ | |
147 | __u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg */ | |
148 | __u32 reserved2[12]; | |
149 | union { | |
150 | __u32 reserved3[12]; | |
151 | struct _fpx_sw_bytes sw_reserved; /* represents the extended | |
152 | * state information */ | |
153 | }; | |
154 | }; | |
155 | ||
156 | #ifndef __KERNEL__ | |
157 | /* | |
158 | * User-space might still rely on the old definition: | |
159 | */ | |
160 | struct sigcontext { | |
161 | __u64 r8; | |
162 | __u64 r9; | |
163 | __u64 r10; | |
164 | __u64 r11; | |
165 | __u64 r12; | |
166 | __u64 r13; | |
167 | __u64 r14; | |
168 | __u64 r15; | |
169 | __u64 rdi; | |
170 | __u64 rsi; | |
171 | __u64 rbp; | |
172 | __u64 rbx; | |
173 | __u64 rdx; | |
174 | __u64 rax; | |
175 | __u64 rcx; | |
176 | __u64 rsp; | |
177 | __u64 rip; | |
178 | __u64 eflags; /* RFLAGS */ | |
179 | __u16 cs; | |
180 | __u16 gs; | |
181 | __u16 fs; | |
182 | __u16 __pad0; | |
183 | __u64 err; | |
184 | __u64 trapno; | |
185 | __u64 oldmask; | |
186 | __u64 cr2; | |
187 | struct _fpstate __user *fpstate; /* zero when no FPU context */ | |
188 | #ifdef __ILP32__ | |
189 | __u32 __fpstate_pad; | |
190 | #endif | |
191 | __u64 reserved1[8]; | |
192 | }; | |
193 | #endif /* !__KERNEL__ */ | |
194 | ||
195 | #endif /* !__i386__ */ | |
196 | ||
197 | struct _header { | |
198 | __u64 xfeatures; | |
199 | __u64 reserved1[2]; | |
200 | __u64 reserved2[5]; | |
201 | }; | |
202 | ||
203 | struct _ymmh_state { | |
204 | /* 16 * 16 bytes for each YMMH-reg */ | |
205 | __u32 ymmh_space[64]; | |
206 | }; | |
207 | ||
208 | /* | |
209 | * Extended state pointed by the fpstate pointer in the sigcontext. | |
210 | * In addition to the fpstate, information encoded in the xstate_hdr | |
211 | * indicates the presence of other extended state information | |
212 | * supported by the processor and OS. | |
213 | */ | |
214 | struct _xstate { | |
215 | struct _fpstate fpstate; | |
216 | struct _header xstate_hdr; | |
217 | struct _ymmh_state ymmh; | |
218 | /* new processor state extensions go here */ | |
219 | }; | |
220 | ||
221 | #endif /* _UAPI_ASM_X86_SIGCONTEXT_H */ |