Viewing file:  sigcontext.h (5.28 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#ifndef _ASM_X86_SIGCONTEXT_H
#define _ASM_X86_SIGCONTEXT_H
#include <linux/types.h>
#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 <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 padding1[44];
union {
unsigned long padding2[12];
struct _fpx_sw_bytes sw_reserved; /* represents the extended
* state info */
};
};
#define X86_FXSR_MAGIC 0x0000
/*
* 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 *fpstate;
unsigned long oldmask;
unsigned long cr2;
};
#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 */
};
};
/*
* 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 *fpstate; /* zero when no FPU context */
unsigned long reserved1[8];
};
#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 */
|