1 /* src/vm/jit/mips/linux/md-os.c - machine dependent MIPS 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: Andreas Krall
30 Changes: Christian Thalinger
32 $Id: md-os.c 4357 2006-01-22 23:33:38Z twisti $
45 #include "vm/jit/mips/md-abi.h"
48 #include "vm/exceptions.h"
49 #include "vm/signallocal.h"
50 #include "vm/stringlocal.h"
51 #include "vm/jit/asmpart.h"
52 #include "vm/jit/stacktrace.h"
55 /* md_init *********************************************************************
57 Do some machine dependent initialization.
59 *******************************************************************************/
63 /* The Boehm GC initialization blocks the SIGSEGV signal. So we do a */
64 /* dummy allocation here to ensure that the GC is initialized. */
66 heap_allocate(1, 0, NULL);
69 /* Turn off flush-to-zero */
73 n.fc_word = get_fpc_csr();
74 n.fc_struct.flush = 0;
75 set_fpc_csr(n.fc_word);
81 /* md_signal_handler_sigsegv ***************************************************
83 NullPointerException signal handler for hardware null pointer
86 *******************************************************************************/
88 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
99 _uc = (struct ucontext *) _p;
100 _mc = &_uc->uc_mcontext;
102 /* in ucontext.h the registers are defined as long long, even for
103 MIPS32, so we cast them */
105 instr = *((u4 *) ((ptrint) _mc->pc));
106 addr = _mc->gregs[(instr >> 21) & 0x1f];
109 pv = (u1 *) (ptrint) _mc->gregs[REG_PV];
110 sp = (u1 *) (ptrint) _mc->gregs[REG_SP];
111 ra = (u1 *) (ptrint) _mc->gregs[REG_RA]; /* this is correct for leafs*/
112 xpc = (u1 *) (ptrint) _mc->pc;
114 _mc->gregs[REG_ITMP1_XPTR] =
115 (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
117 _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
118 _mc->pc = (ptrint) asm_handle_exception;
121 addr += (long) ((instr << 16) >> 16);
123 throw_cacao_exception_exit(string_java_lang_InternalError,
124 "faulting address: 0x%lx at 0x%lx\n",
130 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
131 void thread_restartcriticalsection(ucontext_t *_uc)
136 _mc = &_uc->uc_mcontext;
138 critical = thread_checkcritical((void *) (ptrint) _mc->pc);
141 _mc->pc = (ptrint) critical;
147 * These are local overrides for various environment variables in Emacs.
148 * Please do not remove this and leave it at the end of the file, where
149 * Emacs will automagically detect them.
150 * ---------------------------------------------------------------------
153 * indent-tabs-mode: t