libjava/include/pa-signal.h

   1 // pa-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 #include <sys/syscall.h>
  17
  18 #define HANDLE_SEGV 1
  19 #define HANDLE_FPE 1
  20
  21 #define SIGNAL_HANDLER(_name)                                   \
  22 static void _Jv_##_name (int _dummy, siginfo_t *_info, void *arg)
  23
  24 #define MAKE_THROW_FRAME(_exception)                            \
  25 do                                                              \
  26 {                                                               \
  27   struct ucontext *uc = (struct ucontext *)arg;                 \
  28   struct sigcontext *sc = &uc->uc_mcontext;                     \
  29   (void)_dummy;                                                 \
  30   (void)_info;                                                  \
  31   /* Advance the program counter so that it is after the start  \
  32      of the instruction:  the exception handler expects         \
  33      the PC to point to the instruction after a call. */        \
  34   sc->sc_iaoq[0] = sc->sc_iaoq[1];                              \
  35   sc->sc_iaoq[1] += 4;                                          \
  36 }                                                               \
  37 while (0)
  38
  39 #define INIT_SEGV                                               \
  40 do                                                              \
  41   {                                                             \
  42     struct sigaction act;                                       \
  43     act.sa_sigaction = _Jv_catch_segv;                          \
  44     sigemptyset (&act.sa_mask);                                 \
  45     act.sa_flags = SA_SIGINFO;                                  \
  46     syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, _NSIG / 8); \
  47   }                                                             \
  48 while (0)
  49
  50 #define INIT_FPE                                                \
  51 do                                                              \
  52   {                                                             \
  53     struct sigaction act;                                       \
  54     act.sa_sigaction = _Jv_catch_fpe;                           \
  55     sigemptyset (&act.sa_mask);                                 \
  56     act.sa_flags = SA_SIGINFO;                                  \
  57     syscall (SYS_rt_sigaction, SIGFPE, &act, NULL, _NSIG / 8);  \
  58   }                                                             \
  59 while (0)
  60
  61 #endif /* JAVA_SIGNAL_H */