1 #ifndef _ASM_X86_SIGCONTEXT_H
2 #define _ASM_X86_SIGCONTEXT_H
4 #include <linux/compiler.h>
9 * As documented in the iBCS2 standard..
11 * The first part of "struct _fpstate" is just the normal i387
12 * hardware setup, the extra "status" word is used to save the
13 * coprocessor status word before entering the handler.
15 * Pentium III FXSR, SSE support
16 * Gareth Hughes <gareth@valinux.com>, May 2000
18 * The FPU state data structure has had to grow to accommodate the
19 * extended FPU state required by the Streaming SIMD Extensions.
20 * There is no documented standard to accomplish this at the moment.
23 unsigned short significand[4];
24 unsigned short exponent;
28 unsigned short significand[4];
29 unsigned short exponent;
30 unsigned short padding[3];
34 unsigned long element[4];
38 /* Regular FPU environment */
44 unsigned long dataoff;
45 unsigned long datasel;
47 unsigned short status;
48 unsigned short magic; /* 0xffff = regular FPU data only */
50 /* FXSR FPU environment */
51 unsigned long _fxsr_env[6]; /* FXSR FPU env is ignored */
53 unsigned long reserved;
54 struct _fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
55 struct _xmmreg _xmm[8];
56 unsigned long padding[56];
59 #define X86_FXSR_MAGIC 0x0000
62 unsigned short gs, __gsh;
63 unsigned short fs, __fsh;
64 unsigned short es, __esh;
65 unsigned short ds, __dsh;
77 unsigned short cs, __csh;
79 unsigned long sp_at_signal;
80 unsigned short ss, __ssh;
81 struct _fpstate __user * fpstate;
82 unsigned long oldmask;
89 /* Note: reserved1/2 may someday contain valuable data. Always save/restore
90 them when you change signal frames. */
94 __u16 twd; /* Note this is not the same as the 32bit/x87/FSAVE twd */
100 __u32 st_space[32]; /* 8*16 bytes for each FP-reg */
101 __u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg */
127 unsigned short __pad0;
129 unsigned long trapno;
130 unsigned long oldmask;
132 struct _fpstate __user *fpstate; /* zero when no FPU context */
133 unsigned long reserved1[8];
136 #endif /* !__i386__ */