libjava/include/sparc-signal.h

   1 // sparc-signal.h - Catch runtime signals and turn them into exceptions.
   2
   3 /* Copyright (C) 1998, 1999, 2000  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #ifndef JAVA_SIGNAL_H
  12 #define JAVA_SIGNAL_H 1
  13
  14 #include <signal.h>
  15 #include <ucontext.h>
  16
  17 #define HANDLE_SEGV 1
  18 #define HANDLE_FPE 1
  19
  20 #define SIGNAL_HANDLER(_name)                                           \
  21 static void _name (int _dummy, siginfo_t *_info, void *arg)
  22
  23 #define FLUSH_REGISTER_WINDOWS                                  \
  24   asm volatile ("ta 3");
  25
  26 #define MAKE_THROW_FRAME(_exception)                            \
  27 do                                                              \
  28 {                                                               \
  29   ucontext_t *_context = (ucontext_t *) arg;                    \
  30   (void)_dummy;                                                 \
  31   (void)_info;                                                  \
  32   register int sp = _context->uc_mcontext.gregs[REG_SP];        \
  33   register int retaddr = _context->uc_mcontext.gregs[REG_O7];   \
  34   FLUSH_REGISTER_WINDOWS;                                       \
  35   asm volatile ("mov %0, %%i6; mov %1, %%i7"                    \
  36                 : : "r"(sp), "r"(retaddr));                     \
  37 }                                                               \
  38 while (0)
  39
  40 #define INIT_SEGV                                               \
  41 do                                                              \
  42   {                                                             \
  43     nullp = new java::lang::NullPointerException ();            \
  44     struct sigaction act;                                       \
  45     act.sa_sigaction = catch_segv;                              \
  46     act.sa_flags = SA_SIGINFO | SA_NODEFER;                     \
  47     sigemptyset (&act.sa_mask);                                 \
  48     sigaction (SIGSEGV, &act, NULL);                            \
  49   }                                                             \
  50 while (0)
  51
  52 #define INIT_FPE                                                \
  53 do                                                              \
  54   {                                                             \
  55     arithexception = new java::lang::ArithmeticException        \
  56       (JvNewStringLatin1 ("/ by zero"));                        \
  57     struct sigaction act;                                       \
  58     act.sa_flags = SA_SIGINFO | SA_NODEFER;                     \
  59     act.sa_sigaction = catch_fpe;                               \
  60     sigemptyset (&act.sa_mask);                                 \
  61     sigaction (SIGFPE, &act, NULL);                             \
  62   }                                                             \
  63 while (0)
  64
  65 #endif /* JAVA_SIGNAL_H */