#ifndef _ASM_X86_SIGCONTEXT_H #define _ASM_X86_SIGCONTEXT_H #include #include #define FP_XSTATE_MAGIC1 0x46505853U #define FP_XSTATE_MAGIC2 0x46505845U #define FP_XSTATE_MAGIC2_SIZE sizeof(FP_XSTATE_MAGIC2) /* * bytes 464..511 in the current 512byte layout of fxsave/fxrstor frame * are reserved for SW usage. On cpu's supporting xsave/xrstor, these bytes * are used to extended the fpstate pointer in the sigcontext, which now * includes the extended state information along with fpstate information. * * Presence of FP_XSTATE_MAGIC1 at the beginning of this SW reserved * area and FP_XSTATE_MAGIC2 at the end of memory layout * (extended_size - FP_XSTATE_MAGIC2_SIZE) indicates the presence of the * extended state information in the memory layout pointed by the fpstate * pointer in sigcontext. */ struct _fpx_sw_bytes { __u32 magic1; /* FP_XSTATE_MAGIC1 */ __u32 extended_size; /* total size of the layout referred by * fpstate pointer in the sigcontext. */ __u64 xstate_bv; /* feature bit mask (including fp/sse/extended * state) that is present in the memory * layout. */ __u32 xstate_size; /* actual xsave state size, based on the * features saved in the layout. * 'extended_size' will be greater than * 'xstate_size'. */ __u32 padding[7]; /* for future use. */ }; #ifdef __i386__ /* * 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 , 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 padding1[44]; union { unsigned long padding2[12]; struct _fpx_sw_bytes sw_reserved; /* represents the extended * state info */ }; }; #define X86_FXSR_MAGIC 0x0000 #ifdef __KERNEL__ struct sigcontext { unsigned short gs, __gsh; unsigned short fs, __fsh; unsigned short es, __esh; unsigned short ds, __dsh; unsigned long di; unsigned long si; unsigned long bp; unsigned long sp; unsigned long bx; unsigned long dx; unsigned long cx; unsigned long ax; unsigned long trapno; unsigned long err; unsigned long ip; unsigned short cs, __csh; unsigned long flags; unsigned long sp_at_signal; unsigned short ss, __ssh; /* * fpstate is really (struct _fpstate *) or (struct _xstate *) * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end * of extended memory layout. See comments at the definition of * (struct _fpx_sw_bytes) */ void __user *fpstate; /* zero when no FPU/extended context */ unsigned long oldmask; unsigned long cr2; }; #else /* __KERNEL__ */ /* * User-space might still rely on the old definition: */ 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 /* !__KERNEL__ */ #else /* __i386__ */ /* FXSAVE frame */ /* Note: reserved1/2 may someday contain valuable data. Always save/restore them when you change signal frames. */ struct _fpstate { __u16 cwd; __u16 swd; __u16 twd; /* Note this is not the same as the 32bit/x87/FSAVE twd */ __u16 fop; __u64 rip; __u64 rdp; __u32 mxcsr; __u32 mxcsr_mask; __u32 st_space[32]; /* 8*16 bytes for each FP-reg */ __u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg */ __u32 reserved2[12]; union { __u32 reserved3[12]; struct _fpx_sw_bytes sw_reserved; /* represents the extended * state information */ }; }; #ifdef __KERNEL__ struct sigcontext { unsigned long r8; unsigned long r9; unsigned long r10; unsigned long r11; unsigned long r12; unsigned long r13; unsigned long r14; unsigned long r15; unsigned long di; unsigned long si; unsigned long bp; unsigned long bx; unsigned long dx; unsigned long ax; unsigned long cx; unsigned long sp; unsigned long ip; unsigned long flags; unsigned short cs; unsigned short gs; unsigned short fs; unsigned short __pad0; unsigned long err; unsigned long trapno; unsigned long oldmask; unsigned long cr2; /* * fpstate is really (struct _fpstate *) or (struct _xstate *) * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end * of extended memory layout. See comments at the definition of * (struct _fpx_sw_bytes) */ void __user *fpstate; /* zero when no FPU/extended context */ unsigned long reserved1[8]; }; #else /* __KERNEL__ */ /* * User-space might still rely on the old definition: */ struct sigcontext { unsigned long r8; unsigned long r9; unsigned long r10; unsigned long r11; unsigned long r12; unsigned long r13; unsigned long r14; unsigned long r15; unsigned long rdi; unsigned long rsi; unsigned long rbp; unsigned long rbx; unsigned long rdx; unsigned long rax; unsigned long rcx; unsigned long rsp; unsigned long rip; unsigned long eflags; /* RFLAGS */ unsigned short cs; unsigned short gs; unsigned short fs; unsigned short __pad0; unsigned long err; unsigned long trapno; unsigned long oldmask; unsigned long cr2; struct _fpstate __user *fpstate; /* zero when no FPU context */ unsigned long reserved1[8]; }; #endif /* !__KERNEL__ */ #endif /* !__i386__ */ struct _xsave_hdr { __u64 xstate_bv; __u64 reserved1[2]; __u64 reserved2[5]; }; struct _ymmh_state { /* 16 * 16 bytes for each YMMH-reg */ __u32 ymmh_space[64]; }; /* * Extended state pointed by the fpstate pointer in the sigcontext. * In addition to the fpstate, information encoded in the xstate_hdr * indicates the presence of other extended state information * supported by the processor and OS. */ struct _xstate { struct _fpstate fpstate; struct _xsave_hdr xstate_hdr; struct _ymmh_state ymmh; /* new processor state extensions go here */ }; #endif /* _ASM_X86_SIGCONTEXT_H */