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#ifndef _ASMi386_SIGCONTEXT_H #define _ASMi386_SIGCONTEXT_H #include <linux/compiler.h> /* * As documented in the iBCS2 standard.. * * The first part of "struct _fpstate" is just the normal i387 * hardware setup, the extra "status" word is used to save the * coprocessor status word before entering the handler. * * Pentium III FXSR, SSE support * Gareth Hughes <gareth@valinux.com>, May 2000 * * The FPU state data structure has had to grow to accommodate the * extended FPU state required by the Streaming SIMD Extensions. * There is no documented standard to accomplish this at the moment. */ struct _fpreg { unsigned short significand[4]; unsigned short exponent; }; struct _fpxreg { unsigned short significand[4]; unsigned short exponent; unsigned short padding[3]; }; struct _xmmreg { unsigned long element[4]; }; struct _fpstate { /* Regular FPU environment */ unsigned long cw; unsigned long sw; unsigned long tag; unsigned long ipoff; unsigned long cssel; unsigned long dataoff; unsigned long datasel; struct _fpreg _st[8]; unsigned short status; unsigned short magic; /* 0xffff = regular FPU data only */ /* FXSR FPU environment */ unsigned long _fxsr_env[6]; /* FXSR FPU env is ignored */ unsigned long mxcsr; unsigned long reserved; struct _fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ struct _xmmreg _xmm[8]; unsigned long padding[56]; }; #define X86_FXSR_MAGIC 0x0000 struct sigcontext { unsigned short gs, __gsh; unsigned short fs, __fsh; unsigned short es, __esh; unsigned short ds, __dsh; unsigned long edi; unsigned long esi; unsigned long ebp; unsigned long esp; unsigned long ebx; unsigned long edx; unsigned long ecx; unsigned long eax; unsigned long trapno; unsigned long err; unsigned long eip; unsigned short cs, __csh; unsigned long eflags; unsigned long esp_at_signal; unsigned short ss, __ssh; struct _fpstate __user * fpstate; unsigned long oldmask; unsigned long cr2; }; #endif