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)
81 _uc = (ucontext_t*) _p;
82 _sc = &_uc->uc_mcontext;
84 /* ATTENTION: glibc included messed up kernel headers */
85 /* we needed a workaround for the ucontext structure */
87 addr = (ptrint) siginfo->si_addr;
88 /*xpc = (u1*) _mc->gregs[REG_PC];*/
89 xpc = (u1*) _sc->arm_pc;
92 base = *((s4*) _sc + OFFSET(scontext_t, arm_r0)/4 + ((instr >> 16) & 0x0f));
95 pv = (u1*) _sc->arm_ip;
96 sp = (u1*) _sc->arm_sp;
97 ra = (u1*) _sc->arm_lr; /* this is correct for leafs */
99 _sc->arm_r10 = (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
100 _sc->arm_fp = (ptrint) xpc;
101 _sc->arm_pc = (ptrint) asm_handle_exception;
104 codegen_get_pv_from_pc(xpc);
106 /* this should not happen */
113 /* md_signal_handler_sigill ****************************************************
115 Illegal Instruction signal handler for hardware exception checks.
117 *******************************************************************************/
119 void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
130 java_objectheader *o;
132 _uc = (ucontext_t*) _p;
133 _sc = &_uc->uc_mcontext;
135 /* ATTENTION: glibc included messed up kernel headers we needed a
136 workaround for the ucontext structure. */
138 pv = (u1*) _sc->arm_ip;
139 sp = (u1*) _sc->arm_sp;
140 ra = (u1*) _sc->arm_lr; /* this is correct for leafs */
141 xpc = (u1*) _sc->arm_pc;
143 /* get exception-throwing instruction */
145 mcode = *((u4 *) xpc);
147 /* check for undefined instruction we use */
149 if ((mcode & 0x0ff000f0) != 0x07f000f0)
150 vm_abort("md_signal_handler_sigill: unknown illegal instruction");
152 type = (mcode >> 8) & 0x0fff;
153 val = *((s4 *) _sc + OFFSET(scontext_t, arm_r0)/4 + (mcode & 0x0f));
155 /* generate appropriate exception */
157 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
161 _sc->arm_r10 = (ptrint) o;
162 _sc->arm_fp = (ptrint) xpc;
163 _sc->arm_pc = (ptrint) asm_handle_exception;
167 /* thread_restartcriticalsection ***********************************************
171 *******************************************************************************/
173 #if defined(ENABLE_THREADS)
174 void thread_restartcriticalsection(ucontext_t *_uc)
179 _sc = &_uc->uc_mcontext;
181 critical = critical_find_restart_point((void *) _sc->arm_pc);
184 _sc->arm_pc = (ptrint) critical;
190 * These are local overrides for various environment variables in Emacs.
191 * Please do not remove this and leave it at the end of the file, where
192 * Emacs will automagically detect them.
193 * ---------------------------------------------------------------------
196 * indent-tabs-mode: t