libjava/include/hppa-signal.h

   1 /* hppa-signal.h - Catch runtime signals and turn them into exceptions,
   2    on a HP-UX 11 PA system.  */
   3
   4 /* Copyright (C) 2006  Free Software Foundation
   5
   6    This file is part of libgcj.
   7
   8 This software is copyrighted work licensed under the terms of the
   9 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
  10 details.  */
  11
  12 /* This file is really more of a specification.  The rest of the system
  13    should be arranged so that this Just Works.  */
  14
  15 #ifndef JAVA_SIGNAL_H
  16 # define JAVA_SIGNAL_H 1
  17
  18 #include <sys/types.h>
  19 #include <signal.h>
  20 #include <sys/syscall.h>
  21 #include <unistd.h>
  22
  23 # define HANDLE_SEGV 1
  24 # undef HANDLE_FPE
  25
  26 #define SIGNAL_HANDLER(_name)                                           \
  27   static void _name (int _dummy __attribute__ ((unused)),               \
  28                      siginfo_t *_info __attribute__ ((__unused__)),     \
  29                      void *arg __attribute__ ((__unused__)))
  30
  31 #define MAKE_THROW_FRAME(_exception)                                    \
  32 do                                                                      \
  33 {                                                                       \
  34   ucontext_t *_context = (ucontext_t *) arg;                            \
  35   (void)_dummy;                                                         \
  36   (void)_info;                                                          \
  37   mcontext_t *mc = &(_context->uc_mcontext);                            \
  38   SetSSReg (mc, ss_pcoq_head, GetSSReg (mc, ss_pcoq_tail));             \
  39   SetSSReg (mc, ss_pcsq_head, GetSSReg (mc, ss_pcsq_tail));             \
  40   /* This part is not quit right if the head pc was pointing            \
  41      at a branch.  The tail needs to be adjusted to the branch          \
  42      target if the branch is taken.  The tail space register            \
  43      may need adjustment as well if the branch is an interspace         \
  44      branch.  */                                                        \
  45   SetSSReg (mc, ss_pcoq_tail, (GetSSReg (mc, ss_pcoq_tail) + 4));       \
  46                                                                         \
  47  }                                                                      \
  48 while (0)
  49
  50 # define INIT_SEGV                              \
  51   do {                                          \
  52       struct sigaction sa;                      \
  53       sa.sa_sigaction = catch_segv;             \
  54       sigemptyset (&sa.sa_mask);                \
  55       sa.sa_flags = SA_SIGINFO | SA_NODEFER;    \
  56       sigaction (SIGSEGV, &sa, NULL);           \
  57     } while (0)
  58
  59 # define INIT_FPE                               \
  60   do {                                          \
  61       struct sigaction sa;                      \
  62       sa.sa_sigaction = catch_fpe;              \
  63       sigemptyset (&sa.sa_mask);                \
  64       sa.sa_flags = SA_SIGINFO | SA_NODEFER;    \
  65       sigaction (SIGFPE, &sa, NULL);            \
  66     } while (0)
  67
  68 #endif /* JAVA_SIGNAL_H */