FM / asm

/usr/include/asm

Name	Size	Mode	Actions
a.out.h	693	0644	edit dl rm
auxvec.h	281	0644	edit dl rm
bitsperlong.h	229	0644	edit dl rm
boot.h	260	0644	edit dl rm
bootparam.h	2970	0644	edit dl rm
byteorder.h	137	0644	edit dl rm
debugreg.h	2904	0644	edit dl rm
e820.h	2259	0644	edit dl rm
errno.h	31	0644	edit dl rm
fcntl.h	31	0644	edit dl rm
hyperv.h	8103	0644	edit dl rm
ioctl.h	31	0644	edit dl rm
ioctls.h	32	0644	edit dl rm
ipcbuf.h	32	0644	edit dl rm
ist.h	790	0644	edit dl rm
kvm.h	6212	0644	edit dl rm
kvm_para.h	2305	0644	edit dl rm
ldt.h	1243	0644	edit dl rm
mce.h	5241	0644	edit dl rm
mman.h	170	0644	edit dl rm
msgbuf.h	32	0644	edit dl rm
msr-index.h	23412	0644	edit dl rm
msr.h	311	0644	edit dl rm
mtrr.h	3788	0644	edit dl rm
param.h	31	0644	edit dl rm
poll.h	30	0644	edit dl rm
posix_types.h	92	0644	edit dl rm
posix_types_32.h	1316	0644	edit dl rm
posix_types_64.h	1306	0644	edit dl rm
prctl.h	190	0644	edit dl rm
processor-flags.h	3656	0644	edit dl rm
ptrace-abi.h	1797	0644	edit dl rm
ptrace.h	1192	0644	edit dl rm
resource.h	34	0644	edit dl rm
sembuf.h	699	0644	edit dl rm
setup.h	82	0644	edit dl rm
shmbuf.h	32	0644	edit dl rm
sigcontext.h	5403	0644	edit dl rm
sigcontext32.h	1684	0644	edit dl rm
siginfo.h	198	0644	edit dl rm
signal.h	2958	0644	edit dl rm
socket.h	32	0644	edit dl rm
sockios.h	33	0644	edit dl rm
stat.h	2324	0644	edit dl rm
statfs.h	353	0644	edit dl rm
swab.h	1179	0644	edit dl rm
termbits.h	34	0644	edit dl rm
termios.h	33	0644	edit dl rm
types.h	114	0644	edit dl rm
ucontext.h	339	0644	edit dl rm
unistd.h	82	0644	edit dl rm
unistd_32.h	10692	0644	edit dl rm
unistd_64.h	24238	0644	edit dl rm
vm86.h	3055	0644	edit dl rm
vsyscall.h	375	0644	edit dl rm

Edit: /usr/include/asm/sigcontext.h (5403B)

#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 */

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