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/* Copyright (C) 1997, 1998, 1999, 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1
#include <features.h>
#include <bits/types.h>
#include <bits/sigset.h>
/* Alternate, preferred interface. */
typedef struct sigaltstack
{
void *ss_sp;
size_t ss_size;
int ss_flags;
int __pad[4];
} stack_t;
/* Forward declaration of AIX type. */
typedef struct label_t label_t;
typedef unsigned int kvmhandle_t;
typedef struct
{
unsigned long int __alloc;
kvmhandle_t __srval[16];
} adspace_t;
#define _NGPRS 32
#define _NFPRS 32
struct __mstsafe
{
struct __mstsave *__prev; /* Previous save area. */
label_t *__kjmpbuf; /* Pointer to saved context. */
char *__stackfix; /* Stack fix pointer. */
char __intpri; /* Interrupt priority. */
char __backt; /* Back-track flag. */
char __rsvd[2]; /* Reserved. */
__pid_t __curid; /* Copy of curid. */
int __excp_type; /* Exception type for debugger. */
unsigned long int __iar; /* Instruction address register. */
unsigned long int __msr; /* Machine state register. */
unsigned long int __cr; /* Condition register. */
unsigned long int __lr; /* Link register. */
unsigned long int __ctr; /* Count register. */
unsigned long int __xer; /* Fixed point exception. */
unsigned long int __mq; /* Multiply/quotient register. */
unsigned long int __tid; /* TID register. */
unsigned long int __fpscr; /* Floating point status reg. */
char __fpeu; /* Floating point ever used. */
char __fpinfo; /* Floating point status flags. */
char __pad[2]; /* Pad to dword boundary. */
/* 1 implies state is in mstext */
unsigned long int __except[5]; /* exception structure. */
char __pad1[4]; /* Old bus field. */
unsigned long int __o_iar; /* Old iar (for longjmp excpt). */
unsigned long int __o_toc; /* Old toc (for longjmp excpt). */
unsigned long int __o_arg1; /* Old arg1 (for longjmp excpt). */
unsigned long int __excbranch; /* If not NULL, address to branch
to on exception. Used by
assembler routines for low
cost exception handling. */
unsigned long int __fpscrx; /* Software extension to fpscr. */
unsigned long int __o_vaddr; /* Saved vaddr for vmexception. */
unsigned long int __cachealign[7]; /* Reserved. */
adspace_t __as; /* Segment registers. */
unsigned long int __gpr[_NGPRS]; /* General purpose registers. */
double __fpr[_NFPRS]; /* Floating point registers. */
};
typedef struct mcontext_t
{
struct __mstsafe __jmp_context;
} mcontext_t;
typedef struct ucontext_t
{
int __sc_onstack; /* Sigstack state to restore. */
__sigset_t uc_sigmask; /* The set of signals that are blocked when
this context is active. */
int __sc_uerror; /* u_error to restore. */
mcontext_t uc_mcontext; /* Machine-specific image of saved context. */
struct ucontext_t *uc_link; /* context resumed after this one returns */
stack_t uc_stack; /* stack used by context */
int __pad[4];
} ucontext_t;
#endif /* sys/ucontext.h */
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