include/asm-x86/sigcontext.h

   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 #ifdef __i386__
   8 /*
   9  * As documented in the iBCS2 standard..
  10  *
  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.
  14  *
  15  * Pentium III FXSR, SSE support
  16  *      Gareth Hughes <gareth@valinux.com>, May 2000
  17  *
  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.
  21  */
  22 struct _fpreg {
  23         unsigned short significand[4];
  24         unsigned short exponent;
  25 };
  26
  27 struct _fpxreg {
  28         unsigned short significand[4];
  29         unsigned short exponent;
  30         unsigned short padding[3];
  31 };
  32
  33 struct _xmmreg {
  34         unsigned long element[4];
  35 };
  36
  37 struct _fpstate {
  38         /* Regular FPU environment */
  39         unsigned long   cw;
  40         unsigned long   sw;
  41         unsigned long   tag;
  42         unsigned long   ipoff;
  43         unsigned long   cssel;
  44         unsigned long   dataoff;
  45         unsigned long   datasel;
  46         struct _fpreg   _st[8];
  47         unsigned short  status;
  48         unsigned short  magic;          /* 0xffff = regular FPU data only */
  49
  50         /* FXSR FPU environment */
  51         unsigned long   _fxsr_env[6];   /* FXSR FPU env is ignored */
  52         unsigned long   mxcsr;
  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];
  57 };
  58
  59 #define X86_FXSR_MAGIC          0x0000
  60
  61 struct sigcontext {
  62         unsigned short gs, __gsh;
  63         unsigned short fs, __fsh;
  64         unsigned short es, __esh;
  65         unsigned short ds, __dsh;
  66         unsigned long di;
  67         unsigned long si;
  68         unsigned long bp;
  69         unsigned long sp;
  70         unsigned long bx;
  71         unsigned long dx;
  72         unsigned long cx;
  73         unsigned long ax;
  74         unsigned long trapno;
  75         unsigned long err;
  76         unsigned long ip;
  77         unsigned short cs, __csh;
  78         unsigned long flags;
  79         unsigned long sp_at_signal;
  80         unsigned short ss, __ssh;
  81         struct _fpstate __user * fpstate;
  82         unsigned long oldmask;
  83         unsigned long cr2;
  84 };
  85
  86 #else /* __i386__ */
  87
  88 /* FXSAVE frame */
  89 /* Note: reserved1/2 may someday contain valuable data. Always save/restore
  90    them when you change signal frames. */
  91 struct _fpstate {
  92         __u16   cwd;
  93         __u16   swd;
  94         __u16   twd;    /* Note this is not the same as the 32bit/x87/FSAVE twd */
  95         __u16   fop;
  96         __u64   rip;
  97         __u64   rdp;
  98         __u32   mxcsr;
  99         __u32   mxcsr_mask;
 100         __u32   st_space[32];   /* 8*16 bytes for each FP-reg */
 101         __u32   xmm_space[64];  /* 16*16 bytes for each XMM-reg  */
 102         __u32   reserved2[24];
 103 };
 104
 105 struct sigcontext {
 106         unsigned long r8;
 107         unsigned long r9;
 108         unsigned long r10;
 109         unsigned long r11;
 110         unsigned long r12;
 111         unsigned long r13;
 112         unsigned long r14;
 113         unsigned long r15;
 114         unsigned long di;
 115         unsigned long si;
 116         unsigned long bp;
 117         unsigned long bx;
 118         unsigned long dx;
 119         unsigned long ax;
 120         unsigned long cx;
 121         unsigned long sp;
 122         unsigned long ip;
 123         unsigned long flags;
 124         unsigned short cs;
 125         unsigned short gs;
 126         unsigned short fs;
 127         unsigned short __pad0;
 128         unsigned long err;
 129         unsigned long trapno;
 130         unsigned long oldmask;
 131         unsigned long cr2;
 132         struct _fpstate __user *fpstate;        /* zero when no FPU context */
 133         unsigned long reserved1[8];
 134 };
 135
 136 #endif /* !__i386__ */
 137
 138 #endif