1 /* src/vm/jit/mips/md.c - machine dependent MIPS 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: Christian Thalinger
32 $Id: md.c 2827 2005-06-25 13:43:51Z twisti $
43 #include "vm/jit/mips/md-abi.h"
44 #include "vm/jit/mips/types.h"
46 #include "vm/exceptions.h"
47 #include "vm/stringlocal.h"
48 #include "vm/jit/asmpart.h"
51 /* md_init *********************************************************************
53 Do some machine dependent initialization.
55 *******************************************************************************/
59 /* The Boehm GC initialization blocks the SIGSEGV signal. So we do a */
60 /* dummy allocation here to ensure that the GC is initialized. */
62 heap_allocate(1, 0, NULL);
65 /* Turn off flush-to-zero */
69 n.fc_word = get_fpc_csr();
70 n.fc_struct.flush = 0;
71 set_fpc_csr(n.fc_word);
76 /* signal_handler_sigsegv ******************************************************
78 NullPointerException signal handler for hardware null pointer check.
80 *******************************************************************************/
82 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
89 _uc = (struct ucontext *) _p;
90 _mc = &_uc->uc_mcontext;
92 instr = *((u4 *) (_mc->gregs[CTX_EPC]));
93 addr = _mc->gregs[(instr >> 21) & 0x1f];
96 _mc->gregs[REG_ITMP1_XPTR] = (ptrint) new_nullpointerexception();
97 _mc->gregs[REG_ITMP2_XPC] = _mc->gregs[CTX_EPC];
98 _mc->gregs[CTX_EPC] = (ptrint) asm_handle_exception;
101 addr += (long) ((instr << 16) >> 16);
103 throw_cacao_exception_exit(string_java_lang_InternalError,
104 "faulting address: 0x%lx at 0x%lx\n",
105 addr, _mc->gregs[CTX_EPC]);
110 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
111 void thread_restartcriticalsection(ucontext_t *uc)
115 critical = thread_checkcritical((void*) uc->uc_mcontext.gregs[CTX_EPC]);
118 uc->uc_mcontext.gregs[CTX_EPC] = (ptrint) critical;
123 void docacheflush(u1 *p, long bytelen)
126 long psize = sysconf(_SC_PAGESIZE);
127 p -= (long) p & (psize - 1);
128 e += psize - ((((long) e - 1) & (psize - 1)) + 1);
130 mprotect(p, bytelen, PROT_READ | PROT_WRITE | PROT_EXEC);
135 * These are local overrides for various environment variables in Emacs.
136 * Please do not remove this and leave it at the end of the file, where
137 * Emacs will automagically detect them.
138 * ---------------------------------------------------------------------
141 * indent-tabs-mode: t