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/* Copyright (C) 1993 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#ifndef __GNUC__
#error This file uses GNU C extensions; you must compile with GCC.
#endif
/* Get the definition of `struct sigcontext'. */
#define KERNEL
#define sigvec sun_sigvec
#define sigstack sun_sigstack
#define sigcontext sun_sigcontext
#include "/usr/include/sys/signal.h"
#undef sigvec
#undef sigstack
#undef sigcontext
#undef NSIG
#undef SIGABRT
#undef SIGCLD
#undef SV_ONSTACK
#undef SV_RESETHAND
#undef SV_INTERRUPT
#undef SA_ONSTACK
#undef SA_NOCLDSTOP
#undef SIG_ERR
#undef SIG_DFL
#undef SIG_IGN
#undef sigmask
#undef SIG_BLOCK
#undef SIG_UNBLOCK
#undef SIG_SETMASK
#include <signal.h>
#include <stddef.h>
#include <errno.h>
/* Defined in __sigvec.S. */
extern int EXFUN(__raw_sigvec, (int sig, CONST struct sigvec *vec,
struct sigvec *ovec));
/* User-specified signal handlers. */
#define mytramp 1
#ifdef mytramp
static __sighandler_t handlers[NSIG];
#else
#define handlers _sigfunc
extern __sighandler_t _sigfunc[];
#endif
#if mytramp
/* Handler for all signals that are handled by a user-specified function.
Saves and restores the general regs %g2-%g7, the %y register, and
all the FPU regs (including %fsr), around calling the user's handler. */
static void
DEFUN(trampoline, (sig, code, context, addr),
int sig AND int code AND struct sigcontext *context AND PTR addr)
{
int save[4];
/* Save the call-clobbered registers. */
asm volatile ("movem%.l d0-d1/a0-a1, %0" : : "m" (save[0]));
/* XXX should save/restore FP regs */
/* Call the user's handler. */
(*((void EXFUN((*), (int sig, int code, struct sigcontext *context,
PTR addr))) handlers[sig]))
(sig, code, context, addr);
/* Restore the call-clobbered registers. */
asm volatile ("movem%.l %0, d0-d1/a0-a1" : : "g" (save[0]) :
"d0", "d1", "a0", "a1");
__sigreturn (context);
}
#endif
int
DEFUN(__sigvec, (sig, vec, ovec),
int sig AND CONST struct sigvec *vec AND struct sigvec *ovec)
{
#ifndef mytramp
extern void _sigtramp (int);
#define trampoline _sigtramp
#endif
struct sigvec myvec;
int mask;
__sighandler_t ohandler;
if (sig <= 0 || sig >= NSIG)
{
errno = EINVAL;
return -1;
}
mask = __sigblock(sigmask(sig));
ohandler = handlers[sig];
if (vec != NULL &&
vec->sv_handler != SIG_IGN && vec->sv_handler != SIG_DFL)
{
handlers[sig] = vec->sv_handler;
myvec = *vec;
myvec.sv_handler = trampoline;
vec = &myvec;
}
if (__raw_sigvec(sig, vec, ovec) < 0)
{
int save = errno;
(void) __sigsetmask(mask);
errno = save;
return -1;
}
if (ovec != NULL && ovec->sv_handler == trampoline)
ovec->sv_handler = ohandler;
(void) __sigsetmask(mask);
return 0;
}
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