1 /* src/vm/jit/mips/irix/md-os.c - machine dependent MIPS IRIX 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
31 $Id: md-os.c 6180 2006-12-11 23:29:26Z twisti $
44 #include "vm/jit/mips/md-abi.h"
46 #include "mm/gc-common.h"
47 #include "vm/exceptions.h"
48 #include "vm/global.h"
49 #include "vm/signallocal.h"
50 #include "vm/stringlocal.h"
51 #include "vm/jit/asmpart.h"
52 #include "vm/jit/codegen-common.h"
53 #include "vm/jit/stacktrace.h"
56 /* md_init *********************************************************************
58 Do some machine dependent initialization.
60 *******************************************************************************/
64 /* The Boehm GC initialization blocks the SIGSEGV signal. So we do a */
65 /* dummy allocation here to ensure that the GC is initialized. */
67 #if defined(ENABLE_GC_BOEHM)
68 heap_allocate(1, 0, NULL);
72 /* Turn off flush-to-zero */
76 n.fc_word = get_fpc_csr();
77 n.fc_struct.flush = 0;
78 set_fpc_csr(n.fc_word);
83 /* md_signal_handler_sigsegv ***************************************************
85 NullPointerException signal handler for hardware null pointer
88 *******************************************************************************/
90 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
101 _uc = (struct ucontext *) _p;
102 _mc = &_uc->uc_mcontext;
104 pv = (u1 *) _mc->gregs[REG_PV];
105 sp = (u1 *) _mc->gregs[REG_SP];
106 ra = (u1 *) _mc->gregs[REG_RA]; /* this is correct for leafs */
107 xpc = (u1 *) _mc->gregs[CTX_EPC];
109 instr = *((u4 *) (_mc->gregs[CTX_EPC]));
110 addr = _mc->gregs[(instr >> 21) & 0x1f];
113 _mc->gregs[REG_ITMP1_XPTR] =
114 (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
116 _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
117 _mc->gregs[CTX_EPC] = (ptrint) asm_handle_exception;
120 codegen_get_pv_from_pc(xpc);
122 /* this should not happen */
129 #if defined(ENABLE_THREADS)
130 void thread_restartcriticalsection(ucontext_t *uc)
134 critical = critical_find_restart_point((void*) uc->uc_mcontext.gregs[CTX_EPC]);
137 uc->uc_mcontext.gregs[CTX_EPC] = (ptrint) critical;
143 * These are local overrides for various environment variables in Emacs.
144 * Please do not remove this and leave it at the end of the file, where
145 * Emacs will automagically detect them.
146 * ---------------------------------------------------------------------
149 * indent-tabs-mode: t