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/* Copyright (C) 1998-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1
#include <features.h>
#include <bits/types/sigset_t.h>
#include <bits/types/stack_t.h>
#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif
/*
* These are here mostly for backwards compatibility with older Unices.
* IA-64 Linux does not distinguish between "mcontext_t" and
* "ucontext_t" as all the necessary info is inside the former.
*/
struct __ia64_fpreg_mcontext
{
union
{
unsigned long __ctx(bits)[2];
} __ctx(u);
} __attribute__ ((__aligned__ (16)));
typedef struct
{
unsigned long int __ctx(sc_flags);
unsigned long int __ctx(sc_nat);
stack_t __ctx(sc_stack);
unsigned long int __ctx(sc_ip);
unsigned long int __ctx(sc_cfm);
unsigned long int __ctx(sc_um);
unsigned long int __ctx(sc_ar_rsc);
unsigned long int __ctx(sc_ar_bsp);
unsigned long int __ctx(sc_ar_rnat);
unsigned long int __ctx(sc_ar_ccv);
unsigned long int __ctx(sc_ar_unat);
unsigned long int __ctx(sc_ar_fpsr);
unsigned long int __ctx(sc_ar_pfs);
unsigned long int __ctx(sc_ar_lc);
unsigned long int __ctx(sc_pr);
unsigned long int __ctx(sc_br)[8];
unsigned long int __ctx(sc_gr)[32];
struct __ia64_fpreg_mcontext __ctx(sc_fr)[128];
unsigned long int __ctx(sc_rbs_base);
unsigned long int __ctx(sc_loadrs);
unsigned long int __ctx(sc_ar25);
unsigned long int __ctx(sc_ar26);
unsigned long int __ctx(sc_rsvd)[12];
unsigned long int __ctx(sc_mask);
} mcontext_t;
#if __GNUC_PREREQ (3, 5)
# define _SC_GR0_OFFSET \
__builtin_offsetof (mcontext_t, __ctx(sc_gr)[0])
#elif defined __GNUC__
# define _SC_GR0_OFFSET \
(((char *) &((mcontext_t *) 0)->__ctx(sc_gr)[0]) - (char *) 0)
#else
# define _SC_GR0_OFFSET 0xc8 /* pray that this is correct... */
#endif
typedef struct ucontext_t
{
union
{
mcontext_t _mc;
struct
{
unsigned long _pad[_SC_GR0_OFFSET/8];
struct ucontext_t *_link; /* this should overlay sc_gr[0] */
}
_uc;
}
_u;
}
ucontext_t;
#define uc_mcontext _u._mc
#define uc_sigmask _u._mc.__ctx(sc_mask)
#define uc_stack _u._mc.__ctx(sc_stack)
#define uc_link _u._uc._link
#endif /* sys/ucontext.h */
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