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