1 /* src/vm/jit/powerpc/darwin/md-os.c - machine dependent PowerPC Darwin functions
3 Copyright (C) 1996-2005, 2006, 2007 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
29 $Id: md-os.c 7770 2007-04-19 19:39:06Z twisti $
42 #include "vm/jit/powerpc/codegen.h"
43 #include "vm/jit/powerpc/darwin/md-abi.h"
45 #if defined(ENABLE_THREADS)
46 # include "threads/native/threads.h"
49 #include "vm/exceptions.h"
50 #include "vm/global.h"
51 #include "vm/signallocal.h"
52 #include "vm/stringlocal.h"
54 #include "vm/jit/asmpart.h"
55 #include "vm/jit/stacktrace.h"
58 /* md_signal_handler_sigsegv ***************************************************
60 NullPointerException signal handler for hardware null pointer
63 *******************************************************************************/
65 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
69 ppc_thread_state_t *_ss;
84 _uc = (ucontext_t *) _p;
85 _mc = _uc->uc_mcontext;
88 /* immitate a gregs array */
92 /* get register values */
96 ra = (u1 *) _ss->lr; /* this is correct for leafs */
97 xpc = (u1 *) _ss->srr0;
99 /* get exception-throwing instruction */
101 mcode = *((u4 *) xpc);
103 s1 = M_INSTR_OP2_IMM_A(mcode);
104 disp = M_INSTR_OP2_IMM_I(mcode);
105 d = M_INSTR_OP2_IMM_D(mcode);
109 /* check for special-load */
111 if (s1 == REG_ZERO) {
112 /* we use the exception type as load displacement */
117 /* This is a normal NPE: addr must be NULL and the NPE-type
121 type = EXCEPTION_HARDWARE_NULLPOINTER;
124 vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
127 /* generate appropriate exception */
129 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
133 _ss->r11 = (ptrint) o;
134 _ss->r12 = (ptrint) xpc;
135 _ss->srr0 = (ptrint) asm_handle_exception;
139 /* md_signal_handler_sigtrap ***************************************************
141 Signal handler for hardware-traps.
143 *******************************************************************************/
145 void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
149 ppc_thread_state_t *_ss;
159 java_objectheader *o;
161 _uc = (ucontext_t *) _p;
162 _mc = _uc->uc_mcontext;
165 /* immitate a gregs array */
169 /* get register values */
171 pv = (u1 *) _ss->r13;
173 ra = (u1 *) _ss->lr; /* this is correct for leafs */
174 xpc = (u1 *) _ss->srr0;
176 /* get exception-throwing instruction */
178 mcode = *((u4 *) xpc);
180 s1 = M_OP3_GET_A(mcode);
182 /* for now we only handle ArrayIndexOutOfBoundsException */
184 type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
187 /* generate appropriate exception */
189 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
193 _ss->r11 = (ptrint) o;
194 _ss->r12 = (ptrint) xpc;
195 _ss->srr0 = (ptrint) asm_handle_exception;
199 /* md_signal_handler_sigusr2 ***************************************************
201 Signal handler for profiling sampling.
203 *******************************************************************************/
205 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
210 ppc_thread_state_t *_ss;
215 _uc = (ucontext_t *) _p;
216 _mc = _uc->uc_mcontext;
219 pc = (u1 *) _ss->srr0;
225 #if defined(ENABLE_THREADS)
226 void thread_restartcriticalsection(ucontext_t *_uc)
229 ppc_thread_state_t *_ss;
232 _mc = _uc->uc_mcontext;
235 critical = critical_find_restart_point((void *) _ss->srr0);
238 _ss->srr0 = (ptrint) critical;
244 * These are local overrides for various environment variables in Emacs.
245 * Please do not remove this and leave it at the end of the file, where
246 * Emacs will automagically detect them.
247 * ---------------------------------------------------------------------
250 * indent-tabs-mode: t