zig

fork of https://codeberg.org/ziglang/zig
Log | Files | Refs | README | LICENSE

blob c554d78b (4037B) - Raw

      1 /*	$NetBSD: ucontext.h,v 1.19 2018/02/27 23:09:02 uwe Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999, 2003 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Klaus Klein, and by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_UCONTEXT_H_
     33 #define _SYS_UCONTEXT_H_
     34 
     35 #include <sys/sigtypes.h>
     36 #include <machine/mcontext.h>
     37 
     38 typedef struct __ucontext	ucontext_t;
     39 
     40 struct __ucontext {
     41 	unsigned int	uc_flags;	/* properties */
     42 	ucontext_t * 	uc_link;	/* context to resume */
     43 	sigset_t	uc_sigmask;	/* signals blocked in this context */
     44 	stack_t		uc_stack;	/* the stack used by this context */
     45 	mcontext_t	uc_mcontext;	/* machine state */
     46 #if defined(_UC_MACHINE_PAD)
     47 	long		__uc_pad[_UC_MACHINE_PAD];
     48 #endif
     49 };
     50 
     51 #ifndef _UC_UCONTEXT_ALIGN
     52 #define _UC_UCONTEXT_ALIGN (~0)
     53 #endif
     54 
     55 /* uc_flags */
     56 #define _UC_SIGMASK	0x01		/* valid uc_sigmask */
     57 #define _UC_STACK	0x02		/* valid uc_stack */
     58 #define _UC_CPU		0x04		/* valid GPR context in uc_mcontext */
     59 #define _UC_FPU		0x08		/* valid FPU context in uc_mcontext */
     60 #define	_UC_MD		0x400f0020	/* MD bits.  see below */
     61 
     62 /*
     63  * if your port needs more MD bits, please try to choose bits from _UC_MD
     64  * first, rather than picking random unused bits.
     65  *
     66  * _UC_MD details
     67  *
     68  * 	_UC_TLSBASE	Context contains valid pthread private pointer 
     69  *			All ports must define this MD flag
     70  * 			0x00040000	hppa, mips
     71  * 			0x00000020	alpha
     72  *			0x00080000	all other ports
     73  *
     74  *	_UC_SETSTACK	Context uses signal stack
     75  *			0x00020000	arm
     76  *			[undefined]	alpha, powerpc and vax
     77  *			0x00010000	other ports
     78  *
     79  *	_UC_CLRSTACK	Context does not use signal stack
     80  *			0x00040000	arm
     81  *			[undefined]	alpha, powerpc and vax
     82  *			0x00020000	other ports
     83  *
     84  *	_UC_POWERPC_VEC Context contains valid AltiVec context
     85  *			0x00010000	powerpc only
     86  *
     87  *	_UC_POWERPC_SPE	Context contains valid SPE context
     88  *			0x00020000	powerpc only
     89  *
     90  *	_UC_M68K_UC_USER Used by m68k machdep code, but undocumented
     91  *			0x40000000	m68k only
     92  *
     93  *	_UC_ARM_VFP	Unused
     94  *			0x00010000	arm only
     95  *
     96  *	_UC_VM		Context contains valid virtual 8086 context
     97  *			0x00040000	i386, amd64 only
     98  *
     99  *	_UC_FXSAVE	Context contains FPU context in that 
    100  *			is in FXSAVE format in XMM space 
    101  *			0x00000020	i386, amd64 only
    102  */
    103 
    104 #ifdef _KERNEL
    105 struct lwp;
    106 
    107 void	getucontext(struct lwp *, ucontext_t *);
    108 int	setucontext(struct lwp *, const ucontext_t *);
    109 void	cpu_getmcontext(struct lwp *, mcontext_t *, unsigned int *);
    110 int	cpu_setmcontext(struct lwp *, const mcontext_t *, unsigned int);
    111 int	cpu_mcontext_validate(struct lwp *, const mcontext_t *);
    112 
    113 #ifdef __UCONTEXT_SIZE
    114 __CTASSERT(sizeof(ucontext_t) == __UCONTEXT_SIZE);
    115 #endif
    116 #endif /* _KERNEL */
    117 
    118 #endif /* !_SYS_UCONTEXT_H_ */