include/asm-i386/sigcontext.h

   1 #ifndef _ASMi386_SIGCONTEXT_H
   2 #define _ASMi386_SIGCONTEXT_H
   3
   4 #include <linux/compiler.h>
   5
   6 /*
   7  * As documented in the iBCS2 standard..
   8  *
   9  * The first part of "struct _fpstate" is just the normal i387
  10  * hardware setup, the extra "status" word is used to save the
  11  * coprocessor status word before entering the handler.
  12  *
  13  * Pentium III FXSR, SSE support
  14  *      Gareth Hughes <gareth@valinux.com>, May 2000
  15  *
  16  * The FPU state data structure has had to grow to accommodate the
  17  * extended FPU state required by the Streaming SIMD Extensions.
  18  * There is no documented standard to accomplish this at the moment.
  19  */
  20 struct _fpreg {
  21         unsigned short significand[4];
  22         unsigned short exponent;
  23 };
  24
  25 struct _fpxreg {
  26         unsigned short significand[4];
  27         unsigned short exponent;
  28         unsigned short padding[3];
  29 };
  30
  31 struct _xmmreg {
  32         unsigned long element[4];
  33 };
  34
  35 struct _fpstate {
  36         /* Regular FPU environment */
  37         unsigned long   cw;
  38         unsigned long   sw;
  39         unsigned long   tag;
  40         unsigned long   ipoff;
  41         unsigned long   cssel;
  42         unsigned long   dataoff;
  43         unsigned long   datasel;
  44         struct _fpreg   _st[8];
  45         unsigned short  status;
  46         unsigned short  magic;          /* 0xffff = regular FPU data only */
  47
  48         /* FXSR FPU environment */
  49         unsigned long   _fxsr_env[6];   /* FXSR FPU env is ignored */
  50         unsigned long   mxcsr;
  51         unsigned long   reserved;
  52         struct _fpxreg  _fxsr_st[8];    /* FXSR FPU reg data is ignored */
  53         struct _xmmreg  _xmm[8];
  54         unsigned long   padding[56];
  55 };
  56
  57 #define X86_FXSR_MAGIC          0x0000
  58
  59 struct sigcontext {
  60         unsigned short gs, __gsh;
  61         unsigned short fs, __fsh;
  62         unsigned short es, __esh;
  63         unsigned short ds, __dsh;
  64         unsigned long edi;
  65         unsigned long esi;
  66         unsigned long ebp;
  67         unsigned long esp;
  68         unsigned long ebx;
  69         unsigned long edx;
  70         unsigned long ecx;
  71         unsigned long eax;
  72         unsigned long trapno;
  73         unsigned long err;
  74         unsigned long eip;
  75         unsigned short cs, __csh;
  76         unsigned long eflags;
  77         unsigned long esp_at_signal;
  78         unsigned short ss, __ssh;
  79         struct _fpstate __user * fpstate;
  80         unsigned long oldmask;
  81         unsigned long cr2;
  82 };
  83
  84
  85 #endif