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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _ASMi386_SIGCONTEXT_H |
| 2 | #define _ASMi386_SIGCONTEXT_H |
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| 3 | |||
| 4 | #include <linux/compiler.h> |
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| 5 | |||
| 6 | /* |
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| 7 | * As documented in the iBCS2 standard.. |
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| 8 | * |
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| 9 | * The first part of "struct _fpstate" is just the normal i387 |
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| 10 | * hardware setup, the extra "status" word is used to save the |
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| 11 | * coprocessor status word before entering the handler. |
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| 12 | * |
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| 13 | * Pentium III FXSR, SSE support |
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| 14 | * Gareth Hughes <gareth@valinux.com>, May 2000 |
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| 15 | * |
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| 16 | * The FPU state data structure has had to grow to accommodate the |
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| 17 | * extended FPU state required by the Streaming SIMD Extensions. |
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| 18 | * There is no documented standard to accomplish this at the moment. |
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| 19 | */ |
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| 20 | struct _fpreg { |
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| 21 | unsigned short significand[4]; |
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| 22 | unsigned short exponent; |
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| 23 | }; |
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| 24 | |||
| 25 | struct _fpxreg { |
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| 26 | unsigned short significand[4]; |
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| 27 | unsigned short exponent; |
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| 28 | unsigned short padding[3]; |
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| 29 | }; |
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| 30 | |||
| 31 | struct _xmmreg { |
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| 32 | unsigned long element[4]; |
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| 33 | }; |
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| 34 | |||
| 35 | struct _fpstate { |
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| 36 | /* Regular FPU environment */ |
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| 37 | unsigned long cw; |
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| 38 | unsigned long sw; |
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| 39 | unsigned long tag; |
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| 40 | unsigned long ipoff; |
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| 41 | unsigned long cssel; |
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| 42 | unsigned long dataoff; |
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| 43 | unsigned long datasel; |
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| 44 | struct _fpreg _st[8]; |
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| 45 | unsigned short status; |
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| 46 | unsigned short magic; /* 0xffff = regular FPU data only */ |
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| 47 | |||
| 48 | /* FXSR FPU environment */ |
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| 49 | unsigned long _fxsr_env[6]; /* FXSR FPU env is ignored */ |
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| 50 | unsigned long mxcsr; |
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| 51 | unsigned long reserved; |
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| 52 | struct _fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
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| 53 | struct _xmmreg _xmm[8]; |
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| 54 | unsigned long padding[56]; |
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| 55 | }; |
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| 56 | |||
| 57 | #define X86_FXSR_MAGIC 0x0000 |
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| 58 | |||
| 59 | struct sigcontext { |
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| 60 | unsigned short gs, __gsh; |
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| 61 | unsigned short fs, __fsh; |
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| 62 | unsigned short es, __esh; |
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| 63 | unsigned short ds, __dsh; |
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| 64 | unsigned long edi; |
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| 65 | unsigned long esi; |
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| 66 | unsigned long ebp; |
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| 67 | unsigned long esp; |
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| 68 | unsigned long ebx; |
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| 69 | unsigned long edx; |
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| 70 | unsigned long ecx; |
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| 71 | unsigned long eax; |
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| 72 | unsigned long trapno; |
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| 73 | unsigned long err; |
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| 74 | unsigned long eip; |
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| 75 | unsigned short cs, __csh; |
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| 76 | unsigned long eflags; |
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| 77 | unsigned long esp_at_signal; |
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| 78 | unsigned short ss, __ssh; |
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| 79 | struct _fpstate __user * fpstate; |
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| 80 | unsigned long oldmask; |
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| 81 | unsigned long cr2; |
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| 82 | }; |
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| 83 | |||
| 84 | |||
| 85 | #endif |