1 /* src/vm/jit/i386/linux/md-os.c - machine dependent i386 Linux functions
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Christian Thalinger
31 $Id: md-os.c 2916 2005-07-05 13:59:43Z twisti $
36 #define _GNU_SOURCE /* include REG_ defines from ucontext.h */
40 #include "vm/options.h"
41 #include "vm/stringlocal.h"
42 #include "vm/jit/asmpart.h"
45 /* signal_handler_sigsegv ******************************************************
47 NullPointerException signal handler for hardware null pointer check.
49 *******************************************************************************/
51 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
56 _uc = (ucontext_t *) _p;
57 _mc = &_uc->uc_mcontext;
59 _mc->gregs[REG_ECX] = _mc->gregs[REG_EIP]; /* REG_ITMP2_XPC */
60 _mc->gregs[REG_EAX] = (ptrint) string_java_lang_NullPointerException;
61 _mc->gregs[REG_EIP] = (ptrint) asm_throw_and_handle_exception;
65 /* signal_handler_sigfpe *******************************************************
67 ArithmeticException signal handler for hardware divide by zero check.
69 *******************************************************************************/
71 void signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
76 _uc = (ucontext_t *) _p;
77 _mc = &_uc->uc_mcontext;
79 _mc->gregs[REG_ECX] = _mc->gregs[REG_EIP]; /* REG_ITMP2_XPC */
81 (ptrint) asm_throw_and_handle_hardware_arithmetic_exception;
85 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
86 void thread_restartcriticalsection(ucontext_t *uc)
90 critical = thread_checkcritical((void *) uc->uc_mcontext.gregs[REG_EIP]);
93 uc->uc_mcontext.gregs[REG_EIP] = (ptrint) critical;
99 * These are local overrides for various environment variables in Emacs.
100 * Please do not remove this and leave it at the end of the file, where
101 * Emacs will automagically detect them.
102 * ---------------------------------------------------------------------
105 * indent-tabs-mode: t