| /* 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, 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> |
| |
| #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 defined __cplusplus && __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 */ |