1 /* src/vm/jit/i386/darwin/md-os.c - machine dependent i386 Darwin 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 5074 2006-07-04 16:05:35Z twisti $
44 #include "vm/jit/i386/md-abi.h"
46 #include "vm/exceptions.h"
47 #include "vm/global.h"
48 #include "vm/signallocal.h"
49 #include "vm/stringlocal.h"
50 #include "vm/jit/asmpart.h"
51 #include "vm/jit/stacktrace.h"
53 #include "vm/jit/i386/codegen.h"
56 /* md_signal_handler_sigsegv ***************************************************
58 Signal handler for hardware exceptions.
60 *******************************************************************************/
62 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
67 i386_thread_state_t *_ss;
80 _uc = (ucontext_t *) _p;
81 _mc = _uc->uc_mcontext;
84 pv = NULL; /* is resolved during stackframeinfo creation */
86 xpc = (u1 *) _ss->eip;
87 ra = xpc; /* return address is equal to XPC */
89 /* get exception-throwing instruction */
91 opc = M_ALD_MEM_GET_OPC(xpc);
92 mod = M_ALD_MEM_GET_MOD(xpc);
93 rm = M_ALD_MEM_GET_RM(xpc);
95 /* for values see emit_mov_mem_reg and emit_mem */
97 if ((opc == 0x8b) && (mod == 0) && (rm == 5)) {
98 /* this was a hardware-exception */
100 d = M_ALD_MEM_GET_REG(xpc);
101 disp = M_ALD_MEM_GET_DISP(xpc);
103 /* we use the exception type as load displacement */
107 val = (d == 0) ? _ss->eax :
108 ((d == 1) ? _ss->ecx :
109 ((d == 2) ? _ss->edx :
110 ((d == 3) ? _ss->ebx :
111 ((d == 4) ? _ss->esp :
112 ((d == 5) ? _ss->ebp :
113 ((d == 6) ? _ss->esi : _ss->edi))))));
116 /* this was a normal NPE */
118 type = EXCEPTION_HARDWARE_NULLPOINTER;
121 /* generate appropriate exception */
123 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
127 _ss->eax = (ptrint) o;
128 _ss->ecx = (ptrint) xpc;
129 _ss->eip = (ptrint) asm_handle_exception;
133 /* md_signal_handler_sigfpe ****************************************************
135 ArithmeticException signal handler for hardware divide by zero
138 *******************************************************************************/
140 void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
145 i386_thread_state_t *_ss;
151 java_objectheader *o;
154 _uc = (ucontext_t *) _p;
155 _mc = _uc->uc_mcontext;
158 pv = NULL; /* is resolved during stackframeinfo creation */
159 sp = (u1 *) _ss->esp;
160 xpc = (u1 *) _ss->eip;
161 ra = xpc; /* return address is equal to xpc */
163 /* this is an ArithmeticException */
165 type = EXCEPTION_HARDWARE_ARITHMETIC;
168 /* generate appropriate exception */
170 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
172 _ss->eax = (ptrint) o;
173 _ss->ecx = (ptrint) xpc;
174 _ss->eip = (ptrint) asm_handle_exception;
178 /* md_signal_handler_sigusr2 ***************************************************
180 Signal handler for profiling sampling.
182 *******************************************************************************/
184 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
189 i386_thread_state_t *_ss;
194 _uc = (ucontext_t *) _p;
195 _mc = _uc->uc_mcontext;
198 pc = (u1 *) _ss->eip;
204 #if defined(ENABLE_THREADS)
205 void thread_restartcriticalsection(ucontext_t *_uc)
208 i386_thread_state_t *_ss;
212 _mc = _uc->uc_mcontext;
215 pc = (u1 *) _ss->eip;
217 rpc = critical_find_restart_point(pc);
220 _ss->eip = (ptrint) rpc;
226 * These are local overrides for various environment variables in Emacs.
227 * Please do not remove this and leave it at the end of the file, where
228 * Emacs will automagically detect them.
229 * ---------------------------------------------------------------------
232 * indent-tabs-mode: t