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101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Copyright (C) 2000-2014 Free Software Foundation, Inc.
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Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_UCONTEXT_H
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#define _SYS_UCONTEXT_H 1
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/* Forward definition to avoid parse errors */
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struct ucontext;
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typedef struct ucontext ucontext_t;
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#include <features.h>
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#include <signal.h>
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/* We need the signal context definitions even if they are not used
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included in <signal.h>. */
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#include <bits/sigcontext.h>
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/* Type for a program status word. */
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typedef struct
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{
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unsigned long mask;
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unsigned long addr;
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} __attribute__ ((__aligned__(8))) __psw_t;
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/* Type for a general-purpose register. */
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typedef unsigned long greg_t;
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/* And the whole bunch of them. We should have used `struct s390_regs',
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but to avoid name space pollution and since the tradition says that
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the register set is an array, we make gregset_t a simple array
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that has the same size as s390_regs. This is needed for the
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elf_prstatus structure. */
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#if __WORDSIZE == 64
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# define NGREG 27
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#else
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# define NGREG 36
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#endif
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/* Must match kernels psw_t alignment. */
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typedef greg_t gregset_t[NGREG] __attribute__ ((__aligned__(8)));
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typedef union
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{
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double d;
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float f;
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} fpreg_t;
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/* Register set for the floating-point registers. */
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typedef struct
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{
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unsigned int fpc;
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fpreg_t fprs[16];
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} fpregset_t;
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/* Bit is set if the uc_high_gprs field contains the upper halfs of
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the 64 bit general purpose registers. Since the uc_high_gprs field
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is only available in the 32 bit version of ucontext_t it will never
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be set for 64 bit. */
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#define UCONTEXT_UC_FLAGS_HIGH_GPRS (1UL << 0)
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/* A new uc_flags constant will be defined when actually making use of
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the reserved space: UCONTEXT_UCFLAGS_RESERVED (1UL << 1). */
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/* Context to describe whole processor state. */
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typedef struct
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{
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__psw_t psw;
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unsigned long gregs[16];
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unsigned int aregs[16];
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fpregset_t fpregs;
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} mcontext_t;
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/* Userlevel context. */
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struct ucontext
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{
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unsigned long int uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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mcontext_t uc_mcontext;
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__sigset_t uc_sigmask;
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#ifndef __s390x__
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unsigned long uc_high_gprs[16];
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#endif
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char __reserved[512];
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};
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#endif /* sys/ucontext.h */
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