1 /* src/vm/jit/arm/linux/md-os.c - machine dependent arm linux 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 $Id: md.c 166 2006-01-22 23:38:44Z twisti $
36 #include "vm/jit/arm/md-abi.h"
38 #define ucontext broken_glibc_ucontext
39 #define ucontext_t broken_glibc_ucontext_t
44 typedef struct ucontext {
45 unsigned long uc_flags;
46 struct ucontext *uc_link;
48 struct sigcontext uc_mcontext;
52 #define scontext_t struct sigcontext
54 #include "mm/memory.h"
55 #include "vm/exceptions.h"
56 #include "vm/signallocal.h"
57 #include "vm/stringlocal.h"
58 #include "vm/jit/asmpart.h"
59 #include "vm/jit/stacktrace.h"
62 /* md_signal_handler_sigsegv ***************************************************
64 Signal handler for hardware exceptions.
66 *******************************************************************************/
68 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
82 _uc = (ucontext_t*) _p;
83 _sc = &_uc->uc_mcontext;
85 /* ATTENTION: glibc included messed up kernel headers we needed a
86 workaround for the ucontext structure. */
88 pv = (u1 *) _sc->arm_ip;
89 sp = (u1 *) _sc->arm_sp;
90 ra = (u1 *) _sc->arm_lr; /* this is correct for leafs */
91 xpc = (u1 *) _sc->arm_pc;
93 /* get exception-throwing instruction */
95 mcode = *((s4 *) xpc);
97 /* this is a NullPointerException */
99 /* addr = _mc->gregs[s1]; */
100 addr = *((s4 *) _sc + OFFSET(scontext_t, arm_r0)/4 + ((mcode >> 16) & 0x0f));
101 type = EXCEPTION_HARDWARE_NULLPOINTER;
105 vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
107 /* generate appropriate exception */
109 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
113 _sc->arm_r10 = (ptrint) o;
114 _sc->arm_fp = (ptrint) xpc;
115 _sc->arm_pc = (ptrint) asm_handle_exception;
119 /* md_signal_handler_sigill ****************************************************
121 Illegal Instruction signal handler for hardware exception checks.
123 *******************************************************************************/
125 void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
136 java_objectheader *o;
138 _uc = (ucontext_t*) _p;
139 _sc = &_uc->uc_mcontext;
141 /* ATTENTION: glibc included messed up kernel headers we needed a
142 workaround for the ucontext structure. */
144 pv = (u1 *) _sc->arm_ip;
145 sp = (u1 *) _sc->arm_sp;
146 ra = (u1 *) _sc->arm_lr; /* this is correct for leafs */
147 xpc = (u1 *) _sc->arm_pc;
149 /* get exception-throwing instruction */
151 mcode = *((u4 *) xpc);
153 /* check for undefined instruction we use */
155 if ((mcode & 0x0ff000f0) != 0x07f000f0)
156 vm_abort("md_signal_handler_sigill: unknown illegal instruction");
158 type = (mcode >> 8) & 0x0fff;
159 val = *((s4 *) _sc + OFFSET(scontext_t, arm_r0)/4 + (mcode & 0x0f));
161 /* generate appropriate exception */
163 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
167 _sc->arm_r10 = (ptrint) o;
168 _sc->arm_fp = (ptrint) xpc;
169 _sc->arm_pc = (ptrint) asm_handle_exception;
173 /* md_signal_handler_sigusr2 ***************************************************
175 Signal handler for profiling sampling.
177 *******************************************************************************/
179 #if defined(ENABLE_THREADS)
180 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
182 threadobject *thread;
187 thread = THREADOBJECT;
189 _uc = (ucontext_t*) _p;
190 _sc = &_uc->uc_mcontext;
192 pc = (u1 *) _sc->arm_pc;
199 /* thread_restartcriticalsection ***********************************************
203 *******************************************************************************/
205 #if defined(ENABLE_THREADS)
206 void thread_restartcriticalsection(ucontext_t *_uc)
211 _sc = &_uc->uc_mcontext;
213 critical = critical_find_restart_point((void *) _sc->arm_pc);
216 _sc->arm_pc = (ptrint) critical;
222 * These are local overrides for various environment variables in Emacs.
223 * Please do not remove this and leave it at the end of the file, where
224 * Emacs will automagically detect them.
225 * ---------------------------------------------------------------------
228 * indent-tabs-mode: t