1 // s390-signal.h - Catch runtime signals and turn them into exceptions
2 // on an s390 based Linux system.
4 /* Copyright (C) 2002 Free Software Foundation
6 This file is part of libgcj.
8 This software is copyrighted work licensed under the terms of the
9 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
14 #define JAVA_SIGNAL_H 1
17 #include <sys/syscall.h>
22 #define SIGNAL_HANDLER(_name) \
23 static void _name (int /* _signal */, struct sigcontext _sc)
25 #define MAKE_THROW_FRAME(_exception) \
28 /* Advance the program counter so that it is after the start of the \
29 instruction: the s390 exception handler expects the PSW to point \
30 to the instruction after a call. */ \
31 _sc.sregs->regs.psw.addr += 2; \
37 /* For an explanation why we cannot simply use sigaction to
38 install the handlers, see i386-signal.h. */
40 /* We use old_kernel_sigaction here because we're calling the kernel
41 directly rather than via glibc. The sigaction structure that the
42 syscall uses is a different shape from the one in userland and not
43 visible to us in a header file so we define it here. */
45 struct old_s390_kernel_sigaction
{
46 void (*k_sa_handler
) (int, struct sigcontext
);
47 unsigned long k_sa_mask
;
48 unsigned long k_sa_flags
;
49 void (*sa_restorer
) (void);
55 nullp = new java::lang::NullPointerException (); \
56 struct old_s390_kernel_sigaction kact; \
57 kact.k_sa_handler = catch_segv; \
59 kact.k_sa_flags = 0; \
60 syscall (SYS_sigaction, SIGSEGV, &kact, NULL); \
67 arithexception = new java::lang::ArithmeticException \
68 (JvNewStringLatin1 ("/ by zero")); \
69 struct old_s390_kernel_sigaction kact; \
70 kact.k_sa_handler = catch_fpe; \
72 kact.k_sa_flags = 0; \
73 syscall (SYS_sigaction, SIGFPE, &kact, NULL); \
77 #endif /* JAVA_SIGNAL_H */