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Initial revision
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Roland McGrath
parent
2a96c10282
commit
6e1bdbcff1
164
sysdeps/unix/bsd/sun/m68k/sigtramp.c
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164
sysdeps/unix/bsd/sun/m68k/sigtramp.c
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/* Copyright (C) 1993 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#ifndef __GNUC__
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#error This file uses GNU C extensions; you must compile with GCC.
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#endif
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/* Get the definition of `struct sigcontext'. */
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#define KERNEL
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#define sigvec sun_sigvec
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#define sigstack sun_sigstack
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#define sigcontext sun_sigcontext
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#include "/usr/include/sys/signal.h"
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#undef sigvec
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#undef sigstack
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#undef sigcontext
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#undef NSIG
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#undef SIGABRT
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#undef SIGCLD
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#undef SV_ONSTACK
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#undef SV_RESETHAND
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#undef SV_INTERRUPT
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#undef SA_ONSTACK
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#undef SA_NOCLDSTOP
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#undef SIG_ERR
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#undef SIG_DFL
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#undef SIG_IGN
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#undef sigmask
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#undef SIG_BLOCK
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#undef SIG_UNBLOCK
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#undef SIG_SETMASK
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#include <signal.h>
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#include <stddef.h>
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#include <errno.h>
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/* Defined in __sigvec.S. */
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extern int EXFUN(__raw_sigvec, (int sig, CONST struct sigvec *vec,
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struct sigvec *ovec));
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/* User-specified signal handlers. */
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#define mytramp 1
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#ifdef mytramp
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static __sighandler_t handlers[NSIG];
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#else
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#define handlers _sigfunc
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extern __sighandler_t _sigfunc[];
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#endif
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#if mytramp
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/* Handler for all signals that are handled by a user-specified function.
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Saves and restores the general regs %g2-%g7, the %y register, and
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all the FPU regs (including %fsr), around calling the user's handler. */
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static void
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DEFUN(trampoline, (sig, code, context, addr),
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int sig AND int code AND struct sigcontext *context AND PTR addr)
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{
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register int a0 asm("%a0");
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register int a1 asm("%a1");
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register int d0 asm("%d0");
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register int d1 asm("%d1");
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int savea[2], saved[2];
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double fpsave[16];
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int fsr;
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int savefpu;
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/* Save the call-clobbered registers. */
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savea[0] = a0;
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savea[1] = a1;
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saved[0] = d0;
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saved[1] = d1;
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#if 0
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/* Save the FPU regs if the FPU enable bit is set in the PSR,
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and the signal isn't an FP exception. */
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savefpu = (context->sc_psr & 0x1000) && sig != SIGFPE;
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if (savefpu)
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#endif
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/* Call the user's handler. */
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(*((void EXFUN((*), (int sig, int code, struct sigcontext *context,
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PTR addr))) handlers[sig]))
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(sig, code, context, addr);
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/* Restore the call-clobbered registers. */
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a0 = savea[0];
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a1 = savea[1];
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d0 = saved[0];
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d1 = saved[1];
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#if 0
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if (savefpu)
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;
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#endif
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}
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#endif
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int
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DEFUN(__sigvec, (sig, vec, ovec),
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int sig AND CONST struct sigvec *vec AND struct sigvec *ovec)
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{
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#ifndef mytramp
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extern void _sigtramp (int);
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#define trampoline _sigtramp
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#endif
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struct sigvec myvec;
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int mask;
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__sighandler_t ohandler;
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if (sig <= 0 || sig >= NSIG)
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{
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errno = EINVAL;
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return -1;
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}
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mask = __sigblock(sigmask(sig));
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ohandler = handlers[sig];
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if (vec != NULL &&
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vec->sv_handler != SIG_IGN && vec->sv_handler != SIG_DFL)
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{
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handlers[sig] = vec->sv_handler;
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myvec = *vec;
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myvec.sv_handler = trampoline;
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vec = &myvec;
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}
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if (__raw_sigvec(sig, vec, ovec) < 0)
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{
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int save = errno;
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(void) __sigsetmask(mask);
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errno = save;
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return -1;
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}
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if (ovec != NULL && ovec->sv_handler == trampoline)
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ovec->sv_handler = ohandler;
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(void) __sigsetmask(mask);
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return 0;
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}
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