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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 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, 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 <signal.h>
- /* We need the signal context definitions even if they are not used
- included in <signal.h>. */
- #include <bits/sigcontext.h>
- /* Type for general register. */
- typedef int greg_t;
- /* Number of general registers. */
- #define NGREG 19
- /* Container for all general registers. */
- typedef greg_t gregset_t[NGREG];
- #ifdef __USE_GNU
- /* 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
- /* Definitions taken from the kernel headers. */
- struct _libc_fpreg
- {
- unsigned short int significand[4];
- unsigned short int exponent;
- };
- struct _libc_fpstate
- {
- unsigned long int cw;
- unsigned long int sw;
- unsigned long int tag;
- unsigned long int ipoff;
- unsigned long int cssel;
- unsigned long int dataoff;
- unsigned long int datasel;
- struct _libc_fpreg _st[8];
- unsigned long int status;
- };
- /* Structure to describe FPU registers. */
- typedef struct _libc_fpstate *fpregset_t;
- /* Context to describe whole processor state. */
- typedef struct
- {
- gregset_t gregs;
- /* Due to Linux's history we have to use a pointer here. The SysV/i386
- ABI requires a struct with the values. */
- fpregset_t fpregs;
- unsigned long int oldmask;
- unsigned long int cr2;
- } mcontext_t;
- /* Userlevel context. */
- typedef struct ucontext
- {
- unsigned long int uc_flags;
- struct ucontext *uc_link;
- stack_t uc_stack;
- mcontext_t uc_mcontext;
- __sigset_t uc_sigmask;
- struct _libc_fpstate __fpregs_mem;
- } ucontext_t;
- #endif /* sys/ucontext.h */
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