/* Copyright (C) 1998, 2000, 2001, 2002, 2004 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> #include <bits/sigcontext.h> /* * These are here mostly for backwards compatibility with older Unices. * IA-64 Linux does not distinguish between "struct sigcontext" and * "ucontext_t" as all the necessary info is inside the former. */ typedef struct sigcontext mcontext_t; #if __GNUC_PREREQ (3, 5) # define _SC_GR0_OFFSET \ __builtin_offsetof (struct sigcontext, sc_gr[0]) #elif defined __GNUC__ # define _SC_GR0_OFFSET \ (((char *) &((struct sigcontext *) 0)->sc_gr[0]) - (char *) 0) #else # define _SC_GR0_OFFSET 0xc8 /* pray that this is correct... */ #endif typedef struct ucontext { union { mcontext_t _mc; struct { unsigned long _pad[_SC_GR0_OFFSET/8]; struct ucontext *_link; /* this should overlay sc_gr[0] */ } _uc; } _u; } ucontext_t; #define uc_mcontext _u._mc #define uc_sigmask _u._mc.sc_mask #define uc_stack _u._mc.sc_stack #define uc_link _u._uc._link #endif /* sys/ucontext.h */