1. 根目录:
2. arch
3. s390
4. include
5. uapi
6. asm
7. sigcontext.h

/*
 *  S390 version
 *    Copyright IBM Corp. 1999, 2000
 */

#ifndef _ASM_S390_SIGCONTEXT_H
#define _ASM_S390_SIGCONTEXT_H

#include <linux/compiler.h>
#include <linux/types.h>

#define __NUM_GPRS		16
#define __NUM_FPRS		16
#define __NUM_ACRS		16
#define __NUM_VXRS		32
#define __NUM_VXRS_LOW		16
#define __NUM_VXRS_HIGH		16

#ifndef __s390x__

/* Has to be at least _NSIG_WORDS from asm/signal.h */
#define _SIGCONTEXT_NSIG	64
#define _SIGCONTEXT_NSIG_BPW	32
/* Size of stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE	96

#else /* __s390x__ */

/* Has to be at least _NSIG_WORDS from asm/signal.h */
#define _SIGCONTEXT_NSIG	64
#define _SIGCONTEXT_NSIG_BPW	64 
/* Size of stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE	160

#endif /* __s390x__ */

#define _SIGCONTEXT_NSIG_WORDS	(_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
#define _SIGMASK_COPY_SIZE	(sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)

typedef struct 
{
        unsigned long mask;
        unsigned long addr;
} __attribute__ ((aligned(8))) _psw_t;

typedef struct
{
	_psw_t psw;
	unsigned long gprs[__NUM_GPRS];
	unsigned int  acrs[__NUM_ACRS];
} _s390_regs_common;

typedef struct
{
	unsigned int fpc;
	unsigned int pad;
	double   fprs[__NUM_FPRS];
} _s390_fp_regs;

typedef struct
{
	_s390_regs_common regs;
	_s390_fp_regs     fpregs;
} _sigregs;

typedef struct
{
#ifndef __s390x__
	unsigned long gprs_high[__NUM_GPRS];
#endif
	unsigned long long vxrs_low[__NUM_VXRS_LOW];
	__vector128 vxrs_high[__NUM_VXRS_HIGH];
	unsigned char __reserved[128];
} _sigregs_ext;

struct sigcontext
{
	unsigned long	oldmask[_SIGCONTEXT_NSIG_WORDS];
	_sigregs        __user *sregs;
};


#endif