/* 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, see <http://www.gnu.org/licenses/>. */ #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 */