libjava/include/mips-signal.h

   1 // mips-signal.h - Catch runtime signals and turn them into exceptions
   2 // on an mips based Linux system.
   3
   4 /* Copyright (C) 1998, 1999, 2001, 2002, 2003, 2004, 2006
   5    Free Software Foundation
   6
   7    This file is part of libgcj.
   8
   9 This software is copyrighted work licensed under the terms of the
  10 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
  11 details.  */
  12
  13 /* Adapted from sparc-signal.h and powerpc-signal.h
  14    by David Daney <ddaney@avtrex.com> */
  15
  16 #ifndef JAVA_SIGNAL_H
  17 #define JAVA_SIGNAL_H 1
  18
  19 #include <signal.h>
  20 #include <unistd.h>
  21 #include <sys/syscall.h>
  22 /* #include <asm/ucontext.h> structures we use are here but clash with
  23    sys/ucontext.h included by java-signal.h from prims.cc */
  24
  25 #define HANDLE_SEGV 1
  26 #define HANDLE_FPE 1
  27
  28 /* The third parameter to the signal handler points to something with
  29  * this structure defined in asm/ucontext.h, but the name clashes with
  30  * struct ucontext from sys/ucontext.h so this private copy is used. */
  31 typedef struct _sig_ucontext {
  32     unsigned long         uc_flags;
  33     struct _sig_ucontext  *uc_link;
  34     stack_t               uc_stack;
  35     struct sigcontext uc_mcontext;
  36     sigset_t      uc_sigmask;
  37 } sig_ucontext_t;
  38
  39 #define SIGNAL_HANDLER(_name) \
  40 static void _name (int _dummy __attribute__ ((__unused__)), \
  41                    siginfo_t *_info __attribute__ ((__unused__)), \
  42                    void *_arg __attribute__ ((__unused__)))
  43
  44 /*
  45  *  MIPS leaves pc pointing at the faulting instruction, but the
  46  *  unwinder expects it to point to the following instruction
  47  */
  48
  49 #define MAKE_THROW_FRAME(_exception) \
  50 do                                   \
  51 {                                    \
  52   ((sig_ucontext_t *)_arg)->uc_mcontext.sc_pc += 4;      \
  53   (void)_dummy;                      \
  54   (void)_info;                       \
  55 }                                    \
  56 while (0)
  57
  58 #define INIT_SEGV                            \
  59 do                                           \
  60   {                                          \
  61     struct sigaction act;                    \
  62     act.sa_sigaction = catch_segv;           \
  63     act.sa_flags = SA_SIGINFO | SA_NODEFER;  \
  64     sigemptyset (&act.sa_mask);              \
  65     sigaction(SIGSEGV, &act, NULL);          \
  66   }                                          \
  67 while (0)
  68
  69 #define INIT_FPE                             \
  70 do                                           \
  71   {                                          \
  72     struct sigaction act;                    \
  73     act.sa_sigaction = catch_fpe;            \
  74     act.sa_flags = SA_SIGINFO | SA_NODEFER;  \
  75     sigemptyset (&act.sa_mask);              \
  76     sigaction(SIGFPE, &act, NULL);           \
  77   }                                          \
  78 while (0)
  79
  80 #undef HANDLE_DIVIDE_OVERFLOW
  81
  82 #endif /* JAVA_SIGNAL_H */
  83