| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |