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glibc  2.9
sigvec.c
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00001 /* Copyright (C) 1992, 1996, 1997, 2004 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 /* The sigvec system call on MIPS Ultrix takes an additional
00020    parameter, which is the address that is actually called when the
00021    signal occurs.
00022 
00023    When a signal occurs, we arrange for the kernel to call __handler.
00024    That will save the frame and stack pointers into the context, and
00025    then jump to this routine.  See __handler.S.
00026 
00027    This code is based on sysdeps/unix/bsd/sun4/sigtramp.c, but it's
00028    different because since we get passed the user signal handler we
00029    don't actually need a trampoline.  */
00030 
00031 #include <signal.h>
00032 #include <stddef.h>
00033 #include <errno.h>
00034 
00035 /* The user's signal handler is called with three arguments.  */
00036 typedef void (*handler_type) (int sig, int code, struct sigcontext *);
00037 
00038 extern int __raw_sigvec (int sig, CONST struct sigvec *vec,
00039                       struct sigvec *ovec,
00040                       void (*)(int sig, int code,
00041                               struct sigcontext *,
00042                               handler_type));
00043 
00044 extern void __handler (int sig, int code,
00045                      struct sigcontext *,
00046                      handler_type);
00047 
00048 int
00049 __sigvec (sig, vec, ovec)
00050      int sig;
00051      const struct sigvec *vec;
00052      struct sigvec *ovec;
00053 {
00054   return __raw_sigvec (sig, vec, ovec, __handler);
00055 }