1 /* src/vm/jit/x86_64/md.c - machine dependent x86_64 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.c 2914 2005-07-05 13:39:44Z twisti $
42 #include "vm/jit/x86_64/md-abi.h"
44 #include "vm/options.h"
45 #include "vm/stringlocal.h"
46 #include "vm/jit/asmpart.h"
49 /* md_init *********************************************************************
51 Do some machine dependent initialization.
53 *******************************************************************************/
61 /* signal_handler_sigsegv ******************************************************
63 NullPointerException signal handler for hardware null pointer check.
65 *******************************************************************************/
67 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
72 _uc = (ucontext_t *) _p;
73 _mc = &_uc->uc_mcontext;
75 _mc->gregs[REG_RAX] = (ptrint) string_java_lang_NullPointerException;
76 _mc->gregs[REG_R10] = _mc->gregs[REG_RIP]; /* REG_ITMP2_XPC */
77 _mc->gregs[REG_RIP] = (ptrint) asm_throw_and_handle_exception;
81 /* signal_handler_sigfpe *******************************************************
83 ArithmeticException signal handler for hardware divide by zero check.
85 *******************************************************************************/
87 void signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
92 _uc = (ucontext_t *) _p;
93 _mc = &_uc->uc_mcontext;
95 _mc->gregs[REG_R10] = _mc->gregs[REG_RIP]; /* REG_ITMP2_XPC */
97 (ptrint) asm_throw_and_handle_hardware_arithmetic_exception;
101 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
102 void thread_restartcriticalsection(ucontext_t *uc)
106 critical = thread_checkcritical((void *) uc->uc_mcontext.gregs[REG_RIP]);
109 uc->uc_mcontext.gregs[REG_RIP] = (ptrint) critical;
114 /* md_stacktrace_get_returnaddress *********************************************
116 Returns the return address of the current stackframe, specified by
117 the passed stack pointer and the stack frame size.
119 *******************************************************************************/
121 functionptr md_stacktrace_get_returnaddress(u1 *sp, u4 framesize)
125 /* on x86_64 the return address is above the current stack frame */
127 ra = (functionptr) *((u1 **) (sp + framesize));
134 * These are local overrides for various environment variables in Emacs.
135 * Please do not remove this and leave it at the end of the file, where
136 * Emacs will automagically detect them.
137 * ---------------------------------------------------------------------
140 * indent-tabs-mode: t