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glibc  2.9
sigcontextinfo.h
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00001 /* Copyright (C) 1999, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Philip Blundell <philb@gnu.org>, 1999.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <sys/ucontext.h>
00021 #include "kernel-features.h"
00022 
00023 #define SIGCONTEXT siginfo_t *_si, struct ucontext *
00024 #define SIGCONTEXT_EXTRA_ARGS _si,
00025 
00026 /* The sigcontext structure changed between 2.0 and 2.1 kernels.  On any
00027    modern system we should be able to assume that the "new" format will be
00028    in use.  */
00029 
00030 #define GET_PC(ctx)  ((void *) (ctx)->uc_mcontext.arm_pc)
00031 #define GET_FRAME(ctx)      ADVANCE_STACK_FRAME ((void *) ctx->uc_mcontext.arm_fp)
00032 #define GET_STACK(ctx)      ((void *) (ctx)->uc_mcontext.arm_sp)
00033 
00034 #define ADVANCE_STACK_FRAME(frm)   \
00035                      ((struct layout *)frm - 1)
00036 
00037 #define CALL_SIGHANDLER(handler, signo, ctx) \
00038   (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))
00039 
00040 /* There is no reliable way to get the sigcontext unless we use a
00041    three-argument signal handler.  */
00042 #define __sigaction(sig, act, oact) ({ \
00043   (act)->sa_flags |= SA_SIGINFO; \
00044   (__sigaction) (sig, act, oact); \
00045 })
00046 
00047 #define sigaction(sig, act, oact) ({ \
00048   (act)->sa_flags |= SA_SIGINFO; \
00049   (sigaction) (sig, act, oact); \
00050 })