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120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
/* Copyright (C) 1997,99,2000 Free Software Foundation, Inc.
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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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/* System V/i386 ABI compliant context switching support. */
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#ifndef _SYS_UCONTEXT_H
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#define _SYS_UCONTEXT_H 1
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#include <features.h>
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#include <signal.h>
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/* Type for general register. */
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typedef int greg_t;
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/* Number of general registers. */
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#define NGREG 19
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/* Container for all general registers. */
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typedef greg_t gregset_t[NGREG];
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/* Number of each register is the `gregset_t' array. */
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enum
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{
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REG_GS = 0,
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#define REG_GS REG_GS
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REG_FS,
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#define REG_FS REG_FS
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REG_ES,
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#define REG_ES REG_ES
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REG_DS,
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#define REG_DS REG_DS
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REG_EDI,
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#define REG_EDI REG_EDI
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REG_ESI,
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#define REG_ESI REG_ESI
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REG_EBP,
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#define REG_EBP REG_EBP
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REG_ESP,
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#define REG_ESP REG_ESP
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REG_EBX,
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#define REG_EBX REG_EBX
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REG_EDX,
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#define REG_EDX REG_EDX
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REG_ECX,
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#define REG_ECX REG_ECX
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REG_EAX,
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#define REG_EAX REG_EAX
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REG_TRAPNO,
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#define REG_TRAPNO REG_TRAPNO
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REG_ERR,
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#define REG_ERR REG_ERR
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REG_EIP,
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#define REG_EIP REG_EIP
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REG_CS,
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#define REG_CS REG_CS
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REG_EFL,
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#define REG_EFL REG_EFL
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REG_UESP,
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#define REG_UESP REG_UESP
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REG_SS
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#define REG_SS REG_SS
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};
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/* Structure to describe FPU registers. */
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typedef struct fpregset
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{
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union
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{
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struct fpchip_state
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{
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int state[27];
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int status;
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} fpchip_state;
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struct fp_emul_space
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{
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char fp_emul[246];
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char fp_epad[2];
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} fp_emul_space;
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int f_fpregs[62];
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} fp_reg_set;
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long int f_wregs[33];
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} fpregset_t;
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/* Context to describe whole processor state. */
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typedef struct
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{
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gregset_t gregs;
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fpregset_t fpregs;
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} mcontext_t;
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/* Userlevel context. */
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typedef 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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__sigset_t uc_sigmask;
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stack_t uc_stack;
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mcontext_t uc_mcontext;
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long int uc_filler[5];
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} ucontext_t;
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#endif /* sys/ucontext.h */
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