| // 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 \ |
| { \ |
| 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 \ |
| { \ |
| 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 */ |
| |