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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;
- }
-