arch/s390/include/uapi/asm/sigcontext.h

Source file repositories/reference/linux-study-clean/arch/s390/include/uapi/asm/sigcontext.h

File Facts

System
Linux kernel
Corpus path
arch/s390/include/uapi/asm/sigcontext.h
Extension
.h
Size
1432 bytes
Lines
71
Domain
Architecture Layer
Bucket
arch/s390
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#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

/* 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

#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
{
	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

Annotation

Implementation Notes