// sparc-signal.h - Catch runtime signals and turn them into exceptions.

/* Copyright (C) 1998, 1999  Cygnus Solutions

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the
Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
details.  */

#ifndef JAVA_SIGNAL_H
#define JAVA_SIGNAL_H 1

#include <signal.h>
#include <ucontext.h>

#define HANDLE_SEGV 1
#define HANDLE_FPE 1

#define SIGNAL_HANDLER(_name) 						\
static void _name (int _dummy, siginfo_t *_info, void *arg)

#define FLUSH_REGISTER_WINDOWS					\
  asm volatile ("ta 3");

#define MAKE_THROW_FRAME					\
do								\
{								\
  ucontext_t *_context = (ucontext_t *) arg;                    \
  (void)_dummy;							\
  (void)_info;							\
  register int sp = _context->uc_mcontext.gregs[REG_SP];	\
  register int retaddr = _context->uc_mcontext.gregs[REG_O7];	\
  FLUSH_REGISTER_WINDOWS;					\
  asm volatile ("mov %0, %%i6; mov %1, %%i7"			\
		: : "r"(sp), "r"(retaddr));			\
}								\
while (0)

#define INIT_SEGV						\
do								\
  {								\
    nullp = new java::lang::NullPointerException ();		\
    struct sigaction act;					\
    act.sa_sigaction = catch_segv;				\
    act.sa_flags = SA_SIGINFO | SA_NODEFER;			\
    sigemptyset (&act.sa_mask);					\
    sigaction (SIGSEGV, &act, NULL);				\
  }								\
while (0)							
								
#define INIT_FPE						\
do								\
  {								\
    arithexception = new java::lang::ArithmeticException 	\
      (JvNewStringLatin1 ("/ by zero"));			\
    struct sigaction act;					\
    act.sa_flags = SA_SIGINFO | SA_NODEFER;			\
    act.sa_sigaction = catch_fpe;				\
    sigemptyset (&act.sa_mask);					\
    sigaction (SIGFPE, &act, NULL);				\
  }								\
while (0)

#endif /* JAVA_SIGNAL_H */
