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/* Copyright (C) 1997-2021 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
<https://www.gnu.org/licenses/>. */
/* System V/i386 ABI compliant context switching support. */
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1
#include <features.h>
#include <bits/types/sigset_t.h>
#include <bits/types/stack_t.h>
/* Type for general register. */
typedef int greg_t;
/* Number of general registers. */
#define __NGREG 19
#ifdef __USE_MISC
# define NGREG __NGREG
#endif
/* Container for all general registers. */
typedef greg_t gregset_t[__NGREG];
#ifdef __USE_MISC
/* Number of each register is the `gregset_t' array. */
enum
{
REG_GS = 0,
# define REG_GS REG_GS
REG_FS,
# define REG_FS REG_FS
REG_ES,
# define REG_ES REG_ES
REG_DS,
# define REG_DS REG_DS
REG_EDI,
# define REG_EDI REG_EDI
REG_ESI,
# define REG_ESI REG_ESI
REG_EBP,
# define REG_EBP REG_EBP
REG_ESP,
# define REG_ESP REG_ESP
REG_EBX,
# define REG_EBX REG_EBX
REG_EDX,
# define REG_EDX REG_EDX
REG_ECX,
# define REG_ECX REG_ECX
REG_EAX,
# define REG_EAX REG_EAX
REG_TRAPNO,
# define REG_TRAPNO REG_TRAPNO
REG_ERR,
# define REG_ERR REG_ERR
REG_EIP,
# define REG_EIP REG_EIP
REG_CS,
# define REG_CS REG_CS
REG_EFL,
# define REG_EFL REG_EFL
REG_UESP,
# define REG_UESP REG_UESP
REG_SS
# define REG_SS REG_SS
};
#endif
#ifdef __USE_MISC
# define __ctx(fld) fld
# define __ctxt(tag) tag
#else
# define __ctx(fld) __ ## fld
# define __ctxt(tag) /* Empty. */
#endif
/* Structure to describe FPU registers. */
typedef struct
{
union
{
struct __ctxt(fpchip_state)
{
int __ctx(state)[27];
int __ctx(status);
} __ctx(fpchip_state);
struct __ctxt(fp_emul_space)
{
char __ctx(fp_emul)[246];
char __ctx(fp_epad)[2];
} __ctx(fp_emul_space);
int __ctx(f_fpregs)[62];
} __ctx(fp_reg_set);
long int __ctx(f_wregs)[33];
} fpregset_t;
/* Context to describe whole processor state. */
typedef struct
{
gregset_t __ctx(gregs);
fpregset_t __ctx(fpregs);
} mcontext_t;
/* Userlevel context. */
typedef struct ucontext_t
{
unsigned long int __ctx(uc_flags);
struct ucontext_t *uc_link;
sigset_t uc_sigmask;
stack_t uc_stack;
mcontext_t uc_mcontext;
long int __glibc_reserved1[5];
} ucontext_t;
#undef __ctx
#undef __ctxt
#endif /* sys/ucontext.h */
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