1 /* src/vm/jit/i386/linux/md-os.c - machine dependent i386 Linux functions
3 Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, 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., 51 Franklin Street, Fifth Floor, Boston, MA
25 Contact: cacao@cacaojvm.org
27 Authors: Christian Thalinger
31 $Id: md-os.c 4357 2006-01-22 23:33:38Z twisti $
36 #define _GNU_SOURCE /* include REG_ defines from ucontext.h */
44 #include "vm/exceptions.h"
45 #include "vm/signallocal.h"
46 #include "vm/stringlocal.h"
47 #include "vm/jit/asmpart.h"
48 #include "vm/jit/stacktrace.h"
51 /* md_signal_handler_sigsegv ***************************************************
53 NullPointerException signal handler for hardware null pointer
56 *******************************************************************************/
58 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
66 _uc = (ucontext_t *) _p;
67 _mc = &_uc->uc_mcontext;
69 sp = (u1 *) _mc->gregs[REG_ESP];
70 xpc = (u1 *) _mc->gregs[REG_EIP];
71 ra = xpc; /* return address is equal to xpc */
74 (ptrint) stacktrace_hardware_nullpointerexception(NULL, sp, ra, xpc);
76 _mc->gregs[REG_ECX] = (ptrint) xpc; /* REG_ITMP2_XPC */
77 _mc->gregs[REG_EIP] = (ptrint) asm_handle_exception;
81 /* md_signal_handler_sigfpe ****************************************************
83 ArithmeticException signal handler for hardware divide by zero
86 *******************************************************************************/
88 void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
96 _uc = (ucontext_t *) _p;
97 _mc = &_uc->uc_mcontext;
99 sp = (u1 *) _mc->gregs[REG_ESP];
100 xpc = (u1 *) _mc->gregs[REG_EIP];
101 ra = xpc; /* return address is equal to xpc */
103 _mc->gregs[REG_EAX] =
104 (ptrint) stacktrace_hardware_arithmeticexception(NULL, sp, ra, xpc);
106 _mc->gregs[REG_ECX] = (ptrint) xpc; /* REG_ITMP2_XPC */
107 _mc->gregs[REG_EIP] = (ptrint) asm_handle_exception;
111 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
112 void thread_restartcriticalsection(ucontext_t *uc)
116 critical = thread_checkcritical((void *) uc->uc_mcontext.gregs[REG_EIP]);
119 uc->uc_mcontext.gregs[REG_EIP] = (ptrint) critical;
125 * These are local overrides for various environment variables in Emacs.
126 * Please do not remove this and leave it at the end of the file, where
127 * Emacs will automagically detect them.
128 * ---------------------------------------------------------------------
131 * indent-tabs-mode: t