1 /* src/vm/jit/alpha/md.c - machine dependent Alpha 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: Andreas Krall
30 Changes: Joseph Wenninger
33 $Id: md.c 2804 2005-06-23 13:40:41Z twisti $
41 #include "vm/jit/alpha/md-abi.h"
42 #include "vm/jit/alpha/types.h"
44 #include "vm/exceptions.h"
45 #include "vm/stringlocal.h"
46 #include "vm/jit/asmpart.h"
49 /* signal_handler_sigsegv ******************************************************
51 NullPointerException signal handler for hardware null pointer check.
53 *******************************************************************************/
55 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
62 _uc = (ucontext_t *) _p;
63 _mc = &_uc->uc_mcontext;
65 instr = *((s4 *) (_mc->sc_pc));
66 addr = _mc->sc_regs[(instr >> 16) & 0x1f];
69 _mc->sc_regs[REG_ITMP1_XPTR] =
70 (ptrint) string_java_lang_NullPointerException;
72 _mc->sc_regs[REG_ITMP2_XPC] = _mc->sc_pc;
73 _mc->sc_pc = (ptrint) asm_throw_and_handle_exception;
76 addr += (long) ((instr << 16) >> 16);
78 throw_cacao_exception_exit(string_java_lang_InternalError,
79 "faulting address: 0x%016lx\n", addr);
86 void init_exceptions(void)
91 /* Linux on Digital Alpha needs an initialisation of the ieee floating point
92 control for IEEE compliant arithmetic (option -mieee of GCC). Under
93 Digital Unix this is done automatically.
98 extern unsigned long ieee_get_fp_control();
99 extern void ieee_set_fp_control(unsigned long fp_control);
101 void init_exceptions(void)
103 /* initialize floating point control */
105 ieee_set_fp_control(ieee_get_fp_control()
106 & ~IEEE_TRAP_ENABLE_INV
107 & ~IEEE_TRAP_ENABLE_DZE
108 /* & ~IEEE_TRAP_ENABLE_UNF we dont want underflow */
109 & ~IEEE_TRAP_ENABLE_OVF);
115 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
116 void thread_restartcriticalsection(ucontext_t *uc)
120 critical = thread_checkcritical((void *) uc->uc_mcontext.sc_pc);
123 uc->uc_mcontext.sc_pc = (ptrint) critical;
129 * These are local overrides for various environment variables in Emacs.
130 * Please do not remove this and leave it at the end of the file, where
131 * Emacs will automagically detect them.
132 * ---------------------------------------------------------------------
135 * indent-tabs-mode: t