--- /dev/null
+/* 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)
+{
+ register int a0 asm("%a0");
+ register int a1 asm("%a1");
+ register int d0 asm("%d0");
+ register int d1 asm("%d1");
+
+ int savea[2], saved[2];
+
+ double fpsave[16];
+ int fsr;
+ int savefpu;
+
+ /* Save the call-clobbered registers. */
+ savea[0] = a0;
+ savea[1] = a1;
+ saved[0] = d0;
+ saved[1] = d1;
+
+#if 0
+ /* Save the FPU regs if the FPU enable bit is set in the PSR,
+ and the signal isn't an FP exception. */
+ savefpu = (context->sc_psr & 0x1000) && sig != SIGFPE;
+ if (savefpu)
+#endif
+
+ /* 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. */
+ a0 = savea[0];
+ a1 = savea[1];
+ d0 = saved[0];
+ d1 = saved[1];
+
+#if 0
+ if (savefpu)
+ ;
+#endif
+}
+
+#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;
+}