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 (at) 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 edi; 67 unsigned long esi; 68 unsigned long ebp; 69 unsigned long esp; 70 unsigned long ebx; 71 unsigned long edx; 72 unsigned long ecx; 73 unsigned long eax; 74 unsigned long trapno; 75 unsigned long err; 76 unsigned long eip; 77 unsigned short cs, __csh; 78 unsigned long eflags; 79 unsigned long esp_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 rdi; 115 unsigned long rsi; 116 unsigned long rbp; 117 unsigned long rbx; 118 unsigned long rdx; 119 unsigned long rax; 120 unsigned long rcx; 121 unsigned long rsp; 122 unsigned long rip; 123 unsigned long eflags; /* RFLAGS */ 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 139
