1 /* src/vm/jit/alpha/freebsd/md.c - machine dependent Alpha FreeBSD 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: Christian Thalinger
31 $Id: md-os.c 4921 2006-05-15 14:24:36Z twisti $
40 #include <sys/types.h> /* required by <machine/reg.h> */
41 #include <machine/reg.h>
45 #include "vm/jit/alpha/md-abi.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"
54 /* md_signal_handler_sigsegv ***************************************************
56 NullPointerException signal handler for hardware null pointer
59 *******************************************************************************/
61 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
72 _uc = (ucontext_t *) _p;
73 _mc = &_uc->uc_mcontext;
75 instr = *((s4 *) (_mc->mc_regs[R_PC]));
76 addr = _mc->mc_regs[(instr >> 16) & 0x1f];
79 pv = (u1 *) _mc->mc_regs[REG_PV];
80 sp = (u1 *) _mc->mc_regs[REG_SP];
81 ra = (u1 *) _mc->mc_regs[REG_RA]; /* this is correct for leafs */
82 xpc = (u1 *) _mc->mc_regs[R_PC];
84 _mc->mc_regs[REG_ITMP1_XPTR] =
85 (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
87 _mc->mc_regs[REG_ITMP2_XPC] = (ptrint) xpc;
88 _mc->mc_regs[R_PC] = (ptrint) asm_handle_exception;
91 addr += (long) ((instr << 16) >> 16);
93 throw_cacao_exception_exit(string_java_lang_InternalError,
94 "Segmentation fault: 0x%016lx at 0x%016lx\n",
95 addr, _mc->mc_regs[R_PC]);
100 #if defined(ENABLE_THREADS)
101 void thread_restartcriticalsection(ucontext_t *_uc)
106 _mc = &_uc->uc_mcontext;
108 critical = critical_find_restart_point((void *) _mc->mc_regs[R_PC]);
111 _mc->mc_regs[R_PC] = (ptrint) critical;
117 * These are local overrides for various environment variables in Emacs.
118 * Please do not remove this and leave it at the end of the file, where
119 * Emacs will automagically detect them.
120 * ---------------------------------------------------------------------
123 * indent-tabs-mode: t