cregit-Linux how code gets into the kernel

Release 4.14 arch/sparc/include/uapi/asm/uctx.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * uctx.h: Sparc64 {set,get}context() register state layouts.
 *
 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
 */

#ifndef __SPARC64_UCTX_H

#define __SPARC64_UCTX_H


#define MC_TSTATE	0

#define MC_PC		1

#define MC_NPC		2

#define MC_Y		3

#define MC_G1		4

#define MC_G2		5

#define MC_G3		6

#define MC_G4		7

#define MC_G5		8

#define MC_G6		9

#define MC_G7		10

#define MC_O0		11

#define MC_O1		12

#define MC_O2		13

#define MC_O3		14

#define MC_O4		15

#define MC_O5		16

#define MC_O6		17

#define MC_O7		18

#define MC_NGREG	19


typedef unsigned long mc_greg_t;

typedef mc_greg_t mc_gregset_t[MC_NGREG];


#define MC_MAXFPQ	16

struct mc_fq {
	
unsigned long	*mcfq_addr;
	
unsigned int	mcfq_insn;
};


struct mc_fpu {
	union {
		
unsigned int	sregs[32];
		
unsigned long	dregs[32];
		
long double	qregs[16];
	
} mcfpu_fregs;
	
unsigned long	mcfpu_fsr;
	
unsigned long	mcfpu_fprs;
	
unsigned long	mcfpu_gsr;
	
struct mc_fq	*mcfpu_fq;
	
unsigned char	mcfpu_qcnt;
	
unsigned char	mcfpu_qentsz;
	
unsigned char	mcfpu_enab;
};

typedef struct mc_fpu mc_fpu_t;

typedef struct {
	
mc_gregset_t	mc_gregs;
	
mc_greg_t	mc_fp;
	
mc_greg_t	mc_i7;
	
mc_fpu_t	mc_fpregs;

} mcontext_t;


struct ucontext {
	
struct ucontext		*uc_link;
	
unsigned long		uc_flags;
	
sigset_t		uc_sigmask;
	
mcontext_t		uc_mcontext;
};

typedef struct ucontext ucontext_t;

#endif /* __SPARC64_UCTX_H */

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