1/* Copyright (C) 1997-2025 Free Software Foundation, Inc.  This file is part of the GNU C Library.
  2
  3   The GNU C Library is free software; you can redistribute it and/or
  4   modify it under the terms of the GNU Lesser General Public
  5   License as published by the Free Software Foundation; either
  6   version 2.1 of the License, or (at your option) any later version.
  7
  8   The GNU C Library is distributed in the hope that it will be useful,
  9   but WITHOUT ANY WARRANTY; without even the implied warranty of
 10   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 11   Lesser General Public License for more details.
 12
 13   You should have received a copy of the GNU Lesser General Public
 14   License along with the GNU C Library.  If not, see
 15   <https://www.gnu.org/licenses/>.  */
 16
 17/* Don't rely on this, the interface is currently messed up and may need to
 18   be broken to be fixed.  */
 19#ifndef _SYS_UCONTEXT_H
 20#define _SYS_UCONTEXT_H	1
 21
 22#include <features.h>
 23
 24#include <bits/types/sigset_t.h>
 25#include <bits/types/stack_t.h>
 26
 27#include <sgidefs.h>
 28
 29
 30/* Type for general register.  Even in o32 we assume 64-bit registers,
 31   like the kernel.  */
 32__extension__ typedef unsigned long long int greg_t;
 33
 34/* Number of general registers.  */
 35#define __NGREG	32
 36#define __NFPREG	32
 37#ifdef __USE_MISC
 38# define NGREG	__NGREG
 39# define NFPREG	__NFPREG
 40#endif
 41
 42/* Container for all general registers.  */
 43typedef greg_t gregset_t[__NGREG];
 44
 45#ifdef __USE_MISC
 46# define __ctx(fld) fld
 47#else
 48# define __ctx(fld) __ ## fld
 49#endif
 50
 51/* Container for all FPU registers.  */
 52typedef struct {
 53	union {
 54		double	__ctx(fp_dregs)[__NFPREG];
 55		struct {
 56			float		_fp_fregs;
 57			unsigned int	_fp_pad;
 58		} __ctx(fp_fregs)[__NFPREG];
 59	} __ctx(fp_r);
 60} fpregset_t;
 61
 62
 63/* Context to describe whole processor state.  */
 64#if _MIPS_SIM == _ABIO32
 65/* Earlier versions of glibc for mips had an entirely different
 66   definition of mcontext_t, that didn't even resemble the
 67   corresponding kernel data structure.  Fortunately, makecontext,
 68   [gs]etcontext et all were not implemented back then, so this can
 69   still be rectified.  */
 70typedef struct
 71  {
 72    unsigned int __ctx(regmask);
 73    unsigned int __ctx(status);
 74    greg_t __ctx(pc);
 75    gregset_t __ctx(gregs);
 76    fpregset_t __ctx(fpregs);
 77    unsigned int __ctx(fp_owned);
 78    unsigned int __ctx(fpc_csr);
 79    unsigned int __ctx(fpc_eir);
 80    unsigned int __ctx(used_math);
 81    unsigned int __ctx(dsp);
 82    greg_t __ctx(mdhi);
 83    greg_t __ctx(mdlo);
 84    unsigned long __ctx(hi1);
 85    unsigned long __ctx(lo1);
 86    unsigned long __ctx(hi2);
 87    unsigned long __ctx(lo2);
 88    unsigned long __ctx(hi3);
 89    unsigned long __ctx(lo3);
 90  } mcontext_t;
 91#else
 92typedef struct
 93  {
 94    gregset_t __ctx(gregs);
 95    fpregset_t __ctx(fpregs);
 96    greg_t __ctx(mdhi);
 97    greg_t __ctx(hi1);
 98    greg_t __ctx(hi2);
 99    greg_t __ctx(hi3);
100    greg_t __ctx(mdlo);
101    greg_t __ctx(lo1);
102    greg_t __ctx(lo2);
103    greg_t __ctx(lo3);
104    greg_t __ctx(pc);
105    unsigned int __ctx(fpc_csr);
106    unsigned int __ctx(used_math);
107    unsigned int __ctx(dsp);
108    unsigned int __glibc_reserved1;
109  } mcontext_t;
110#endif
111
112/* Userlevel context.  */
113typedef struct ucontext_t
114  {
115    unsigned long int __ctx(uc_flags);
116    struct ucontext_t *uc_link;
117    stack_t uc_stack;
118    mcontext_t uc_mcontext;
119    sigset_t uc_sigmask;
120  } ucontext_t;
121
122#undef __ctx
123
124#endif /* sys/ucontext.h */