1 /* src/vm/jit/x86_64/linux/md-os.c - machine dependent x86_64 Linux functions
3 Copyright (C) 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 $Id: md.c 7249 2007-01-29 19:32:52Z twisti $
40 #include "vm/jit/x86_64/codegen.h"
42 #if defined(ENABLE_THREADS)
43 # include "threads/native/threads.h"
46 #include "vm/exceptions.h"
47 #include "vm/signallocal.h"
49 #include "vm/jit/asmpart.h"
50 #include "vm/jit/stacktrace.h"
53 /* md_signal_handler_sigsegv ***************************************************
55 Signal handler for hardware exception.
57 *******************************************************************************/
59 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
75 _uc = (ucontext_t *) _p;
76 _mc = &_uc->uc_mcontext;
78 /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
79 different to the ones in <ucontext.h>. */
81 sp = (u1 *) _mc->gregs[REG_RSP];
82 xpc = (u1 *) _mc->gregs[REG_RIP];
83 ra = xpc; /* return address is equal to xpc */
86 /* check for StackOverflowException */
88 threads_check_stackoverflow(sp);
91 /* get exception-throwing instruction */
93 opc = M_ALD_MEM_GET_OPC(xpc);
94 mod = M_ALD_MEM_GET_MOD(xpc);
95 rm = M_ALD_MEM_GET_RM(xpc);
97 /* for values see emit_mov_mem_reg and emit_mem */
99 if ((opc == 0x8b) && (mod == 0) && (rm == 4)) {
100 /* this was a hardware-exception */
102 d = M_ALD_MEM_GET_REG(xpc);
103 disp = M_ALD_MEM_GET_DISP(xpc);
105 /* we use the exception type as load displacement */
111 /* ATTENTION: The _mc->gregs layout is even worse than on
112 i386! See /usr/include/sys/ucontext.h. We need a
113 switch-case here... */
116 case 0: /* REG_RAX == 13 */
119 case 1: /* REG_RCX == 14 */
122 case 2: /* REG_RDX == 12 */
125 case 3: /* REG_RBX == 11 */
128 case 4: /* REG_RSP == 15 */
131 case 5: /* REG_RBP == 10 */
134 case 6: /* REG_RSI == 9 */
137 case 7: /* REG_RDI == 8 */
140 case 8: /* REG_R8 == 0 */
141 case 9: /* REG_R9 == 1 */
142 case 10: /* REG_R10 == 2 */
143 case 11: /* REG_R11 == 3 */
144 case 12: /* REG_R12 == 4 */
145 case 13: /* REG_R13 == 5 */
146 case 14: /* REG_R14 == 6 */
147 case 15: /* REG_R15 == 7 */
155 /* this was a normal NPE */
157 type = EXCEPTION_HARDWARE_NULLPOINTER;
160 /* generate appropriate exception */
162 o = exceptions_new_hardware_exception(NULL, sp, ra, xpc, type, val);
166 _mc->gregs[REG_RAX] = (ptrint) o;
167 _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
168 _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
172 /* md_signal_handler_sigfpe ****************************************************
174 ArithmeticException signal handler for hardware divide by zero
177 *******************************************************************************/
179 void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
189 java_objectheader *o;
191 _uc = (ucontext_t *) _p;
192 _mc = &_uc->uc_mcontext;
194 /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
195 different to the ones in <ucontext.h>. */
198 sp = (u1 *) _mc->gregs[REG_RSP];
199 xpc = (u1 *) _mc->gregs[REG_RIP];
200 ra = xpc; /* return address is equal to xpc */
202 /* this is an ArithmeticException */
204 type = EXCEPTION_HARDWARE_ARITHMETIC;
207 /* generate appropriate exception */
209 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
213 _mc->gregs[REG_RAX] = (ptrint) o;
214 _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
215 _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
219 /* md_signal_handler_sigusr2 ***************************************************
221 Signal handler for profiling sampling.
223 *******************************************************************************/
225 #if defined(ENABLE_THREADS)
226 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
235 _uc = (ucontext_t *) _p;
236 _mc = &_uc->uc_mcontext;
238 /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
239 different to the ones in <ucontext.h>. */
241 pc = (u1 *) _mc->gregs[REG_RIP];
248 /* md_critical_section_restart *************************************************
250 Search the critical sections tree for a matching section and set
251 the PC to the restart point, if necessary.
253 *******************************************************************************/
255 #if defined(ENABLE_THREADS)
256 void md_critical_section_restart(ucontext_t *_uc)
262 _mc = &_uc->uc_mcontext;
264 /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
265 different to the ones in <ucontext.h>. */
267 pc = (u1 *) _mc->gregs[REG_RIP];
269 npc = critical_find_restart_point(pc);
272 log_println("md_critical_section_restart: pc=%p, npc=%p", pc, npc);
273 _mc->gregs[REG_RIP] = (ptrint) npc;
280 * These are local overrides for various environment variables in Emacs.
281 * Please do not remove this and leave it at the end of the file, where
282 * Emacs will automagically detect them.
283 * ---------------------------------------------------------------------
286 * indent-tabs-mode: t
290 * vim:noexpandtab:sw=4:ts=4: