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 #ifdef __arch64__
  24 #define FLUSH_REGISTER_WINDOWS                                  \
  25   asm volatile ("flushw");
  26 #else
  27 #define FLUSH_REGISTER_WINDOWS                                  \
  28   asm volatile ("ta 3");
  29 #endif
  30
  31 #define MAKE_THROW_FRAME(_exception)                            \
  32 do                                                              \
  33 {                                                               \
  34   ucontext_t *_context = (ucontext_t *) arg;                    \
  35   (void)_dummy;                                                 \
  36   (void)_info;                                                  \
  37   register long sp = _context->uc_mcontext.gregs[REG_SP];       \
  38   register long retaddr = _context->uc_mcontext.gregs[REG_O7];  \
  39   FLUSH_REGISTER_WINDOWS;                                       \
  40   asm volatile ("mov %0, %%i6; mov %1, %%i7"                    \
  41                 : : "r"(sp), "r"(retaddr));                     \
  42 }                                                               \
  43 while (0)
  44
  45 #define INIT_SEGV                                               \
  46 do                                                              \
  47   {                                                             \
  48     nullp = new java::lang::NullPointerException ();            \
  49     struct sigaction act;                                       \
  50     act.sa_sigaction = catch_segv;                              \
  51     act.sa_flags = SA_SIGINFO | SA_NODEFER;                     \
  52     sigemptyset (&act.sa_mask);                                 \
  53     sigaction (SIGSEGV, &act, NULL);                            \
  54   }                                                             \
  55 while (0)
  56
  57 #define INIT_FPE                                                \
  58 do                                                              \
  59   {                                                             \
  60     arithexception = new java::lang::ArithmeticException        \
  61       (JvNewStringLatin1 ("/ by zero"));                        \
  62     struct sigaction act;                                       \
  63     act.sa_flags = SA_SIGINFO | SA_NODEFER;                     \
  64     act.sa_sigaction = catch_fpe;                               \
  65     sigemptyset (&act.sa_mask);                                 \
  66     sigaction (SIGFPE, &act, NULL);                             \
  67   }                                                             \
  68 while (0)
  69
  70 #endif /* JAVA_SIGNAL_H */