1 /* src/vm/jit/powerpc/linux/md-os.c - machine dependent PowerPC 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: Christian Thalinger
31 $Id: md-os.c 5038 2006-06-19 22:22:34Z twisti $
43 #include "vm/jit/powerpc/linux/md-abi.h"
45 #if defined(ENABLE_THREADS)
46 # include "threads/native/threads.h"
49 #include "vm/exceptions.h"
50 #include "vm/signallocal.h"
51 #include "vm/stringlocal.h"
52 #include "vm/jit/asmpart.h"
54 #if defined(ENABLE_PROFILING)
55 # include "vm/jit/profile/profile.h"
58 #include "vm/jit/stacktrace.h"
61 /* md_signal_handler_sigsegv ***************************************************
63 NullPointerException signal handler for hardware null pointer
66 *******************************************************************************/
68 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
80 _uc = (ucontext_t *) _p;
81 _mc = _uc->uc_mcontext.uc_regs;
83 instr = *((u4 *) _mc->gregs[PT_NIP]);
84 reg = (instr >> 16) & 0x1f;
85 addr = _mc->gregs[reg];
88 pv = (u1 *) _mc->gregs[REG_PV];
89 sp = (u1 *) _mc->gregs[REG_SP];
90 ra = (u1 *) _mc->gregs[PT_LNK]; /* this is correct for leafs */
91 xpc = (u1 *) _mc->gregs[PT_NIP];
93 _mc->gregs[REG_ITMP1_XPTR] =
94 (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
96 _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
97 _mc->gregs[PT_NIP] = (ptrint) asm_handle_exception;
100 throw_cacao_exception_exit(string_java_lang_InternalError,
101 "Segmentation fault: 0x%08lx at 0x%08lx",
102 addr, _mc->gregs[PT_NIP]);
107 /* md_signal_handler_sigusr2 ***************************************************
109 Signal handler for profiling sampling.
111 *******************************************************************************/
113 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
122 _uc = (ucontext_t *) _p;
123 _mc = _uc->uc_mcontext.uc_regs;
125 pc = (u1 *) _mc->gregs[PT_NIP];
131 #if defined(ENABLE_THREADS)
132 void thread_restartcriticalsection(ucontext_t *_uc)
138 _mc = _uc->uc_mcontext.uc_regs;
140 pc = (u1 *) _mc->gregs[PT_NIP];
142 critical = critical_find_restart_point(pc);
145 _mc->gregs[PT_NIP] = (ptrint) critical;
151 * These are local overrides for various environment variables in Emacs.
152 * Please do not remove this and leave it at the end of the file, where
153 * Emacs will automagically detect them.
154 * ---------------------------------------------------------------------
157 * indent-tabs-mode: t