1 files changed, 78 insertions, 0 deletions
diff --git a/libjava/include/s390-signal.h b/libjava/include/s390-signal.h
new file mode 100644
index 0000000..44777c0
--- /dev/null
+++ b/libjava/include/s390-signal.h
@@ -0,0 +1,78 @@
+// s390-signal.h - Catch runtime signals and turn them into exceptions
+// on an s390 based Linux system.
+
+/* Copyright (C) 2002  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+
+#ifndef JAVA_SIGNAL_H
+#define JAVA_SIGNAL_H 1
+
+#include <signal.h>
+#include <sys/syscall.h>
+
+#define HANDLE_SEGV 1
+#undef HANDLE_FPE
+
+#define SIGNAL_HANDLER(_name)	\
+static void _name (int /* _signal */, struct sigcontext _sc)
+
+#define MAKE_THROW_FRAME(_exception)					\
+do									\
+{									\
+  /* Advance the program counter so that it is after the start of the	\
+     instruction:  the s390 exception handler expects the PSW to point 	\
+     to the instruction after a call. */				\
+  _sc.sregs->regs.psw.addr += 2;					\
+									\
+}									\
+while (0)
+
+
+/* For an explanation why we cannot simply use sigaction to
+   install the handlers, see i386-signal.h.  */
+
+/* We use old_kernel_sigaction here because we're calling the kernel
+   directly rather than via glibc.  The sigaction structure that the
+   syscall uses is a different shape from the one in userland and not
+   visible to us in a header file so we define it here.  */
+
+struct old_s390_kernel_sigaction {
+	void (*k_sa_handler) (int, struct sigcontext);
+	unsigned long k_sa_mask;
+	unsigned long k_sa_flags;
+	void (*sa_restorer) (void);
+};
+
+#define INIT_SEGV					\
+do							\
+  {							\
+    nullp = new java::lang::NullPointerException ();	\
+    struct old_s390_kernel_sigaction kact;		\
+    kact.k_sa_handler = catch_segv;			\
+    kact.k_sa_mask = 0;					\
+    kact.k_sa_flags = 0;				\
+    syscall (SYS_sigaction, SIGSEGV, &kact, NULL);	\
+  }							\
+while (0)  
+
+#define INIT_FPE						\
+do								\
+  {								\
+    arithexception = new java::lang::ArithmeticException	\
+      (JvNewStringLatin1 ("/ by zero"));			\
+    struct old_s390_kernel_sigaction kact;			\
+    kact.k_sa_handler = catch_fpe;				\
+    kact.k_sa_mask = 0;						\
+    kact.k_sa_flags = 0;					\
+    syscall (SYS_sigaction, SIGFPE, &kact, NULL);		\
+  }								\
+while (0)  
+
+#endif /* JAVA_SIGNAL_H */
+